diff options
author | Eli Cohen <eli@mellanox.com> | 2013-07-07 16:25:49 +0200 |
---|---|---|
committer | Roland Dreier <roland@purestorage.com> | 2013-07-08 19:32:24 +0200 |
commit | e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c (patch) | |
tree | c886014a89a8a96b8fb171ad6683dc80ce2ff018 /drivers | |
parent | IB/core: Add reserved values to enums for low-level driver use (diff) | |
download | linux-e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c.tar.xz linux-e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c.zip |
mlx5: Add driver for Mellanox Connect-IB adapters
The driver is comprised of two kernel modules: mlx5_ib and mlx5_core.
This partitioning resembles what we have for mlx4, except that mlx5_ib
is the pci device driver and not mlx5_core.
mlx5_core is essentially a library that provides general functionality
that is intended to be used by other Mellanox devices that will be
introduced in the future. mlx5_ib has a similar role as any hardware
device under drivers/infiniband/hw.
Signed-off-by: Eli Cohen <eli@mellanox.com>
Signed-off-by: Jack Morgenstein <jackm@dev.mellanox.co.il>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
[ Merge in coccinelle fixes from Fengguang Wu <fengguang.wu@intel.com>.
- Roland ]
Signed-off-by: Roland Dreier <roland@purestorage.com>
Diffstat (limited to 'drivers')
37 files changed, 13292 insertions, 0 deletions
diff --git a/drivers/infiniband/Kconfig b/drivers/infiniband/Kconfig index c85b56c28099..5ceda710f516 100644 --- a/drivers/infiniband/Kconfig +++ b/drivers/infiniband/Kconfig @@ -50,6 +50,7 @@ source "drivers/infiniband/hw/amso1100/Kconfig" source "drivers/infiniband/hw/cxgb3/Kconfig" source "drivers/infiniband/hw/cxgb4/Kconfig" source "drivers/infiniband/hw/mlx4/Kconfig" +source "drivers/infiniband/hw/mlx5/Kconfig" source "drivers/infiniband/hw/nes/Kconfig" source "drivers/infiniband/hw/ocrdma/Kconfig" diff --git a/drivers/infiniband/Makefile b/drivers/infiniband/Makefile index b126fefe0b1c..1fe69888515f 100644 --- a/drivers/infiniband/Makefile +++ b/drivers/infiniband/Makefile @@ -7,6 +7,7 @@ obj-$(CONFIG_INFINIBAND_AMSO1100) += hw/amso1100/ obj-$(CONFIG_INFINIBAND_CXGB3) += hw/cxgb3/ obj-$(CONFIG_INFINIBAND_CXGB4) += hw/cxgb4/ obj-$(CONFIG_MLX4_INFINIBAND) += hw/mlx4/ +obj-$(CONFIG_MLX5_INFINIBAND) += hw/mlx5/ obj-$(CONFIG_INFINIBAND_NES) += hw/nes/ obj-$(CONFIG_INFINIBAND_OCRDMA) += hw/ocrdma/ obj-$(CONFIG_INFINIBAND_IPOIB) += ulp/ipoib/ diff --git a/drivers/infiniband/hw/mlx5/Kconfig b/drivers/infiniband/hw/mlx5/Kconfig new file mode 100644 index 000000000000..8e6aebfaf8a4 --- /dev/null +++ b/drivers/infiniband/hw/mlx5/Kconfig @@ -0,0 +1,10 @@ +config MLX5_INFINIBAND + tristate "Mellanox Connect-IB HCA support" + depends on NETDEVICES && ETHERNET && PCI && X86 + select NET_VENDOR_MELLANOX + select MLX5_CORE + ---help--- + This driver provides low-level InfiniBand support for + Mellanox Connect-IB PCI Express host channel adapters (HCAs). + This is required to use InfiniBand protocols such as + IP-over-IB or SRP with these devices. diff --git a/drivers/infiniband/hw/mlx5/Makefile b/drivers/infiniband/hw/mlx5/Makefile new file mode 100644 index 000000000000..4ea0135af484 --- /dev/null +++ b/drivers/infiniband/hw/mlx5/Makefile @@ -0,0 +1,3 @@ +obj-$(CONFIG_MLX5_INFINIBAND) += mlx5_ib.o + +mlx5_ib-y := main.o cq.o doorbell.o qp.o mem.o srq.o mr.o ah.o mad.o diff --git a/drivers/infiniband/hw/mlx5/ah.c b/drivers/infiniband/hw/mlx5/ah.c new file mode 100644 index 000000000000..39ab0caefdf9 --- /dev/null +++ b/drivers/infiniband/hw/mlx5/ah.c @@ -0,0 +1,92 @@ +/* + * Copyright (c) 2013, Mellanox Technologies inc. All rights reserved. + * + * This software is available to you under a choice of one of two + * licenses. You may choose to be licensed under the terms of the GNU + * General Public License (GPL) Version 2, available from the file + * COPYING in the main directory of this source tree, or the + * OpenIB.org BSD license below: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * - Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * - Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +#include "mlx5_ib.h" + +struct ib_ah *create_ib_ah(struct ib_ah_attr *ah_attr, + struct mlx5_ib_ah *ah) +{ + if (ah_attr->ah_flags & IB_AH_GRH) { + memcpy(ah->av.rgid, &ah_attr->grh.dgid, 16); + ah->av.grh_gid_fl = cpu_to_be32(ah_attr->grh.flow_label | + (1 << 30) | + ah_attr->grh.sgid_index << 20); + ah->av.hop_limit = ah_attr->grh.hop_limit; + ah->av.tclass = ah_attr->grh.traffic_class; + } + + ah->av.rlid = cpu_to_be16(ah_attr->dlid); + ah->av.fl_mlid = ah_attr->src_path_bits & 0x7f; + ah->av.stat_rate_sl = (ah_attr->static_rate << 4) | (ah_attr->sl & 0xf); + + return &ah->ibah; +} + +struct ib_ah *mlx5_ib_create_ah(struct ib_pd *pd, struct ib_ah_attr *ah_attr) +{ + struct mlx5_ib_ah *ah; + + ah = kzalloc(sizeof(*ah), GFP_ATOMIC); + if (!ah) + return ERR_PTR(-ENOMEM); + + return create_ib_ah(ah_attr, ah); /* never fails */ +} + +int mlx5_ib_query_ah(struct ib_ah *ibah, struct ib_ah_attr *ah_attr) +{ + struct mlx5_ib_ah *ah = to_mah(ibah); + u32 tmp; + + memset(ah_attr, 0, sizeof(*ah_attr)); + + tmp = be32_to_cpu(ah->av.grh_gid_fl); + if (tmp & (1 << 30)) { + ah_attr->ah_flags = IB_AH_GRH; + ah_attr->grh.sgid_index = (tmp >> 20) & 0xff; + ah_attr->grh.flow_label = tmp & 0xfffff; + memcpy(&ah_attr->grh.dgid, ah->av.rgid, 16); + ah_attr->grh.hop_limit = ah->av.hop_limit; + ah_attr->grh.traffic_class = ah->av.tclass; + } + ah_attr->dlid = be16_to_cpu(ah->av.rlid); + ah_attr->static_rate = ah->av.stat_rate_sl >> 4; + ah_attr->sl = ah->av.stat_rate_sl & 0xf; + + return 0; +} + +int mlx5_ib_destroy_ah(struct ib_ah *ah) +{ + kfree(to_mah(ah)); + return 0; +} diff --git a/drivers/infiniband/hw/mlx5/cq.c b/drivers/infiniband/hw/mlx5/cq.c new file mode 100644 index 000000000000..344ab03948a3 --- /dev/null +++ b/drivers/infiniband/hw/mlx5/cq.c @@ -0,0 +1,843 @@ +/* + * Copyright (c) 2013, Mellanox Technologies inc. All rights reserved. + * + * This software is available to you under a choice of one of two + * licenses. You may choose to be licensed under the terms of the GNU + * General Public License (GPL) Version 2, available from the file + * COPYING in the main directory of this source tree, or the + * OpenIB.org BSD license below: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * - Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * - Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +#include <linux/kref.h> +#include <rdma/ib_umem.h> +#include "mlx5_ib.h" +#include "user.h" + +static void mlx5_ib_cq_comp(struct mlx5_core_cq *cq) +{ + struct ib_cq *ibcq = &to_mibcq(cq)->ibcq; + + ibcq->comp_handler(ibcq, ibcq->cq_context); +} + +static void mlx5_ib_cq_event(struct mlx5_core_cq *mcq, enum mlx5_event type) +{ + struct mlx5_ib_cq *cq = container_of(mcq, struct mlx5_ib_cq, mcq); + struct mlx5_ib_dev *dev = to_mdev(cq->ibcq.device); + struct ib_cq *ibcq = &cq->ibcq; + struct ib_event event; + + if (type != MLX5_EVENT_TYPE_CQ_ERROR) { + mlx5_ib_warn(dev, "Unexpected event type %d on CQ %06x\n", + type, mcq->cqn); + return; + } + + if (ibcq->event_handler) { + event.device = &dev->ib_dev; + event.event = IB_EVENT_CQ_ERR; + event.element.cq = ibcq; + ibcq->event_handler(&event, ibcq->cq_context); + } +} + +static void *get_cqe_from_buf(struct mlx5_ib_cq_buf *buf, int n, int size) +{ + return mlx5_buf_offset(&buf->buf, n * size); +} + +static void *get_cqe(struct mlx5_ib_cq *cq, int n) +{ + return get_cqe_from_buf(&cq->buf, n, cq->mcq.cqe_sz); +} + +static void *get_sw_cqe(struct mlx5_ib_cq *cq, int n) +{ + void *cqe = get_cqe(cq, n & cq->ibcq.cqe); + struct mlx5_cqe64 *cqe64; + + cqe64 = (cq->mcq.cqe_sz == 64) ? cqe : cqe + 64; + return ((cqe64->op_own & MLX5_CQE_OWNER_MASK) ^ + !!(n & (cq->ibcq.cqe + 1))) ? NULL : cqe; +} + +static void *next_cqe_sw(struct mlx5_ib_cq *cq) +{ + return get_sw_cqe(cq, cq->mcq.cons_index); +} + +static enum ib_wc_opcode get_umr_comp(struct mlx5_ib_wq *wq, int idx) +{ + switch (wq->wr_data[idx]) { + case MLX5_IB_WR_UMR: + return 0; + + case IB_WR_LOCAL_INV: + return IB_WC_LOCAL_INV; + + case IB_WR_FAST_REG_MR: + return IB_WC_FAST_REG_MR; + + default: + pr_warn("unknown completion status\n"); + return 0; + } +} + +static void handle_good_req(struct ib_wc *wc, struct mlx5_cqe64 *cqe, + struct mlx5_ib_wq *wq, int idx) +{ + wc->wc_flags = 0; + switch (be32_to_cpu(cqe->sop_drop_qpn) >> 24) { + case MLX5_OPCODE_RDMA_WRITE_IMM: + wc->wc_flags |= IB_WC_WITH_IMM; + case MLX5_OPCODE_RDMA_WRITE: + wc->opcode = IB_WC_RDMA_WRITE; + break; + case MLX5_OPCODE_SEND_IMM: + wc->wc_flags |= IB_WC_WITH_IMM; + case MLX5_OPCODE_SEND: + case MLX5_OPCODE_SEND_INVAL: + wc->opcode = IB_WC_SEND; + break; + case MLX5_OPCODE_RDMA_READ: + wc->opcode = IB_WC_RDMA_READ; + wc->byte_len = be32_to_cpu(cqe->byte_cnt); + break; + case MLX5_OPCODE_ATOMIC_CS: + wc->opcode = IB_WC_COMP_SWAP; + wc->byte_len = 8; + break; + case MLX5_OPCODE_ATOMIC_FA: + wc->opcode = IB_WC_FETCH_ADD; + wc->byte_len = 8; + break; + case MLX5_OPCODE_ATOMIC_MASKED_CS: + wc->opcode = IB_WC_MASKED_COMP_SWAP; + wc->byte_len = 8; + break; + case MLX5_OPCODE_ATOMIC_MASKED_FA: + wc->opcode = IB_WC_MASKED_FETCH_ADD; + wc->byte_len = 8; + break; + case MLX5_OPCODE_BIND_MW: + wc->opcode = IB_WC_BIND_MW; + break; + case MLX5_OPCODE_UMR: + wc->opcode = get_umr_comp(wq, idx); + break; + } +} + +enum { + MLX5_GRH_IN_BUFFER = 1, + MLX5_GRH_IN_CQE = 2, +}; + +static void handle_responder(struct ib_wc *wc, struct mlx5_cqe64 *cqe, + struct mlx5_ib_qp *qp) +{ + struct mlx5_ib_dev *dev = to_mdev(qp->ibqp.device); + struct mlx5_ib_srq *srq; + struct mlx5_ib_wq *wq; + u16 wqe_ctr; + u8 g; + + if (qp->ibqp.srq || qp->ibqp.xrcd) { + struct mlx5_core_srq *msrq = NULL; + + if (qp->ibqp.xrcd) { + msrq = mlx5_core_get_srq(&dev->mdev, + be32_to_cpu(cqe->srqn)); + srq = to_mibsrq(msrq); + } else { + srq = to_msrq(qp->ibqp.srq); + } + if (srq) { + wqe_ctr = be16_to_cpu(cqe->wqe_counter); + wc->wr_id = srq->wrid[wqe_ctr]; + mlx5_ib_free_srq_wqe(srq, wqe_ctr); + if (msrq && atomic_dec_and_test(&msrq->refcount)) + complete(&msrq->free); + } + } else { + wq = &qp->rq; + wc->wr_id = wq->wrid[wq->tail & (wq->wqe_cnt - 1)]; + ++wq->tail; + } + wc->byte_len = be32_to_cpu(cqe->byte_cnt); + + switch (cqe->op_own >> 4) { + case MLX5_CQE_RESP_WR_IMM: + wc->opcode = IB_WC_RECV_RDMA_WITH_IMM; + wc->wc_flags = IB_WC_WITH_IMM; + wc->ex.imm_data = cqe->imm_inval_pkey; + break; + case MLX5_CQE_RESP_SEND: + wc->opcode = IB_WC_RECV; + wc->wc_flags = 0; + break; + case MLX5_CQE_RESP_SEND_IMM: + wc->opcode = IB_WC_RECV; + wc->wc_flags = IB_WC_WITH_IMM; + wc->ex.imm_data = cqe->imm_inval_pkey; + break; + case MLX5_CQE_RESP_SEND_INV: + wc->opcode = IB_WC_RECV; + wc->wc_flags = IB_WC_WITH_INVALIDATE; + wc->ex.invalidate_rkey = be32_to_cpu(cqe->imm_inval_pkey); + break; + } + wc->slid = be16_to_cpu(cqe->slid); + wc->sl = (be32_to_cpu(cqe->flags_rqpn) >> 24) & 0xf; + wc->src_qp = be32_to_cpu(cqe->flags_rqpn) & 0xffffff; + wc->dlid_path_bits = cqe->ml_path; + g = (be32_to_cpu(cqe->flags_rqpn) >> 28) & 3; + wc->wc_flags |= g ? IB_WC_GRH : 0; + wc->pkey_index = be32_to_cpu(cqe->imm_inval_pkey) & 0xffff; +} + +static void dump_cqe(struct mlx5_ib_dev *dev, struct mlx5_err_cqe *cqe) +{ + __be32 *p = (__be32 *)cqe; + int i; + + mlx5_ib_warn(dev, "dump error cqe\n"); + for (i = 0; i < sizeof(*cqe) / 16; i++, p += 4) + pr_info("%08x %08x %08x %08x\n", be32_to_cpu(p[0]), + be32_to_cpu(p[1]), be32_to_cpu(p[2]), + be32_to_cpu(p[3])); +} + +static void mlx5_handle_error_cqe(struct mlx5_ib_dev *dev, + struct mlx5_err_cqe *cqe, + struct ib_wc *wc) +{ + int dump = 1; + + switch (cqe->syndrome) { + case MLX5_CQE_SYNDROME_LOCAL_LENGTH_ERR: + wc->status = IB_WC_LOC_LEN_ERR; + break; + case MLX5_CQE_SYNDROME_LOCAL_QP_OP_ERR: + wc->status = IB_WC_LOC_QP_OP_ERR; + break; + case MLX5_CQE_SYNDROME_LOCAL_PROT_ERR: + wc->status = IB_WC_LOC_PROT_ERR; + break; + case MLX5_CQE_SYNDROME_WR_FLUSH_ERR: + dump = 0; + wc->status = IB_WC_WR_FLUSH_ERR; + break; + case MLX5_CQE_SYNDROME_MW_BIND_ERR: + wc->status = IB_WC_MW_BIND_ERR; + break; + case MLX5_CQE_SYNDROME_BAD_RESP_ERR: + wc->status = IB_WC_BAD_RESP_ERR; + break; + case MLX5_CQE_SYNDROME_LOCAL_ACCESS_ERR: + wc->status = IB_WC_LOC_ACCESS_ERR; + break; + case MLX5_CQE_SYNDROME_REMOTE_INVAL_REQ_ERR: + wc->status = IB_WC_REM_INV_REQ_ERR; + break; + case MLX5_CQE_SYNDROME_REMOTE_ACCESS_ERR: + wc->status = IB_WC_REM_ACCESS_ERR; + break; + case MLX5_CQE_SYNDROME_REMOTE_OP_ERR: + wc->status = IB_WC_REM_OP_ERR; + break; + case MLX5_CQE_SYNDROME_TRANSPORT_RETRY_EXC_ERR: + wc->status = IB_WC_RETRY_EXC_ERR; + dump = 0; + break; + case MLX5_CQE_SYNDROME_RNR_RETRY_EXC_ERR: + wc->status = IB_WC_RNR_RETRY_EXC_ERR; + dump = 0; + break; + case MLX5_CQE_SYNDROME_REMOTE_ABORTED_ERR: + wc->status = IB_WC_REM_ABORT_ERR; + break; + default: + wc->status = IB_WC_GENERAL_ERR; + break; + } + + wc->vendor_err = cqe->vendor_err_synd; + if (dump) + dump_cqe(dev, cqe); +} + +static int is_atomic_response(struct mlx5_ib_qp *qp, uint16_t idx) +{ + /* TBD: waiting decision + */ + return 0; +} + +static void *mlx5_get_atomic_laddr(struct mlx5_ib_qp *qp, uint16_t idx) +{ + struct mlx5_wqe_data_seg *dpseg; + void *addr; + + dpseg = mlx5_get_send_wqe(qp, idx) + sizeof(struct mlx5_wqe_ctrl_seg) + + sizeof(struct mlx5_wqe_raddr_seg) + + sizeof(struct mlx5_wqe_atomic_seg); + addr = (void *)(unsigned long)be64_to_cpu(dpseg->addr); + return addr; +} + +static void handle_atomic(struct mlx5_ib_qp *qp, struct mlx5_cqe64 *cqe64, + uint16_t idx) +{ + void *addr; + int byte_count; + int i; + + if (!is_atomic_response(qp, idx)) + return; + + byte_count = be32_to_cpu(cqe64->byte_cnt); + addr = mlx5_get_atomic_laddr(qp, idx); + + if (byte_count == 4) { + *(uint32_t *)addr = be32_to_cpu(*((__be32 *)addr)); + } else { + for (i = 0; i < byte_count; i += 8) { + *(uint64_t *)addr = be64_to_cpu(*((__be64 *)addr)); + addr += 8; + } + } + + return; +} + +static void handle_atomics(struct mlx5_ib_qp *qp, struct mlx5_cqe64 *cqe64, + u16 tail, u16 head) +{ + int idx; + + do { + idx = tail & (qp->sq.wqe_cnt - 1); + handle_atomic(qp, cqe64, idx); + if (idx == head) + break; + + tail = qp->sq.w_list[idx].next; + } while (1); + tail = qp->sq.w_list[idx].next; + qp->sq.last_poll = tail; +} + +static int mlx5_poll_one(struct mlx5_ib_cq *cq, + struct mlx5_ib_qp **cur_qp, + struct ib_wc *wc) +{ + struct mlx5_ib_dev *dev = to_mdev(cq->ibcq.device); + struct mlx5_err_cqe *err_cqe; + struct mlx5_cqe64 *cqe64; + struct mlx5_core_qp *mqp; + struct mlx5_ib_wq *wq; + uint8_t opcode; + uint32_t qpn; + u16 wqe_ctr; + void *cqe; + int idx; + + cqe = next_cqe_sw(cq); + if (!cqe) + return -EAGAIN; + + cqe64 = (cq->mcq.cqe_sz == 64) ? cqe : cqe + 64; + + ++cq->mcq.cons_index; + + /* Make sure we read CQ entry contents after we've checked the + * ownership bit. + */ + rmb(); + + /* TBD: resize CQ */ + + qpn = ntohl(cqe64->sop_drop_qpn) & 0xffffff; + if (!*cur_qp || (qpn != (*cur_qp)->ibqp.qp_num)) { + /* We do not have to take the QP table lock here, + * because CQs will be locked while QPs are removed + * from the table. + */ + mqp = __mlx5_qp_lookup(&dev->mdev, qpn); + if (unlikely(!mqp)) { + mlx5_ib_warn(dev, "CQE@CQ %06x for unknown QPN %6x\n", + cq->mcq.cqn, qpn); + return -EINVAL; + } + + *cur_qp = to_mibqp(mqp); + } + + wc->qp = &(*cur_qp)->ibqp; + opcode = cqe64->op_own >> 4; + switch (opcode) { + case MLX5_CQE_REQ: + wq = &(*cur_qp)->sq; + wqe_ctr = be16_to_cpu(cqe64->wqe_counter); + idx = wqe_ctr & (wq->wqe_cnt - 1); + handle_good_req(wc, cqe64, wq, idx); + handle_atomics(*cur_qp, cqe64, wq->last_poll, idx); + wc->wr_id = wq->wrid[idx]; + wq->tail = wq->wqe_head[idx] + 1; + wc->status = IB_WC_SUCCESS; + break; + case MLX5_CQE_RESP_WR_IMM: + case MLX5_CQE_RESP_SEND: + case MLX5_CQE_RESP_SEND_IMM: + case MLX5_CQE_RESP_SEND_INV: + handle_responder(wc, cqe64, *cur_qp); + wc->status = IB_WC_SUCCESS; + break; + case MLX5_CQE_RESIZE_CQ: + break; + case MLX5_CQE_REQ_ERR: + case MLX5_CQE_RESP_ERR: + err_cqe = (struct mlx5_err_cqe *)cqe64; + mlx5_handle_error_cqe(dev, err_cqe, wc); + mlx5_ib_dbg(dev, "%s error cqe on cqn 0x%x:\n", + opcode == MLX5_CQE_REQ_ERR ? + "Requestor" : "Responder", cq->mcq.cqn); + mlx5_ib_dbg(dev, "syndrome 0x%x, vendor syndrome 0x%x\n", + err_cqe->syndrome, err_cqe->vendor_err_synd); + if (opcode == MLX5_CQE_REQ_ERR) { + wq = &(*cur_qp)->sq; + wqe_ctr = be16_to_cpu(cqe64->wqe_counter); + idx = wqe_ctr & (wq->wqe_cnt - 1); + wc->wr_id = wq->wrid[idx]; + wq->tail = wq->wqe_head[idx] + 1; + } else { + struct mlx5_ib_srq *srq; + + if ((*cur_qp)->ibqp.srq) { + srq = to_msrq((*cur_qp)->ibqp.srq); + wqe_ctr = be16_to_cpu(cqe64->wqe_counter); + wc->wr_id = srq->wrid[wqe_ctr]; + mlx5_ib_free_srq_wqe(srq, wqe_ctr); + } else { + wq = &(*cur_qp)->rq; + wc->wr_id = wq->wrid[wq->tail & (wq->wqe_cnt - 1)]; + ++wq->tail; + } + } + break; + } + + return 0; +} + +int mlx5_ib_poll_cq(struct ib_cq *ibcq, int num_entries, struct ib_wc *wc) +{ + struct mlx5_ib_cq *cq = to_mcq(ibcq); + struct mlx5_ib_qp *cur_qp = NULL; + unsigned long flags; + int npolled; + int err = 0; + + spin_lock_irqsave(&cq->lock, flags); + + for (npolled = 0; npolled < num_entries; npolled++) { + err = mlx5_poll_one(cq, &cur_qp, wc + npolled); + if (err) + break; + } + + if (npolled) + mlx5_cq_set_ci(&cq->mcq); + + spin_unlock_irqrestore(&cq->lock, flags); + + if (err == 0 || err == -EAGAIN) + return npolled; + else + return err; +} + +int mlx5_ib_arm_cq(struct ib_cq *ibcq, enum ib_cq_notify_flags flags) +{ + mlx5_cq_arm(&to_mcq(ibcq)->mcq, + (flags & IB_CQ_SOLICITED_MASK) == IB_CQ_SOLICITED ? + MLX5_CQ_DB_REQ_NOT_SOL : MLX5_CQ_DB_REQ_NOT, + to_mdev(ibcq->device)->mdev.priv.uuari.uars[0].map, + MLX5_GET_DOORBELL_LOCK(&to_mdev(ibcq->device)->mdev.priv.cq_uar_lock)); + + return 0; +} + +static int alloc_cq_buf(struct mlx5_ib_dev *dev, struct mlx5_ib_cq_buf *buf, + int nent, int cqe_size) +{ + int err; + + err = mlx5_buf_alloc(&dev->mdev, nent * cqe_size, + PAGE_SIZE * 2, &buf->buf); + if (err) + return err; + + buf->cqe_size = cqe_size; + + return 0; +} + +static void free_cq_buf(struct mlx5_ib_dev *dev, struct mlx5_ib_cq_buf *buf) +{ + mlx5_buf_free(&dev->mdev, &buf->buf); +} + +static int create_cq_user(struct mlx5_ib_dev *dev, struct ib_udata *udata, + struct ib_ucontext *context, struct mlx5_ib_cq *cq, + int entries, struct mlx5_create_cq_mbox_in **cqb, + int *cqe_size, int *index, int *inlen) +{ + struct mlx5_ib_create_cq ucmd; + int page_shift; + int npages; + int ncont; + int err; + + if (ib_copy_from_udata(&ucmd, udata, sizeof(ucmd))) + return -EFAULT; + + if (ucmd.cqe_size != 64 && ucmd.cqe_size != 128) + return -EINVAL; + + *cqe_size = ucmd.cqe_size; + + cq->buf.umem = ib_umem_get(context, ucmd.buf_addr, + entries * ucmd.cqe_size, + IB_ACCESS_LOCAL_WRITE, 1); + if (IS_ERR(cq->buf.umem)) { + err = PTR_ERR(cq->buf.umem); + return err; + } + + err = mlx5_ib_db_map_user(to_mucontext(context), ucmd.db_addr, + &cq->db); + if (err) + goto err_umem; + + mlx5_ib_cont_pages(cq->buf.umem, ucmd.buf_addr, &npages, &page_shift, + &ncont, NULL); + mlx5_ib_dbg(dev, "addr 0x%llx, size %u, npages %d, page_shift %d, ncont %d\n", + ucmd.buf_addr, entries * ucmd.cqe_size, npages, page_shift, ncont); + + *inlen = sizeof(**cqb) + sizeof(*(*cqb)->pas) * ncont; + *cqb = mlx5_vzalloc(*inlen); + if (!*cqb) { + err = -ENOMEM; + goto err_db; + } + mlx5_ib_populate_pas(dev, cq->buf.umem, page_shift, (*cqb)->pas, 0); + (*cqb)->ctx.log_pg_sz = page_shift - PAGE_SHIFT; + + *index = to_mucontext(context)->uuari.uars[0].index; + + return 0; + +err_db: + mlx5_ib_db_unmap_user(to_mucontext(context), &cq->db); + +err_umem: + ib_umem_release(cq->buf.umem); + return err; +} + +static void destroy_cq_user(struct mlx5_ib_cq *cq, struct ib_ucontext *context) +{ + mlx5_ib_db_unmap_user(to_mucontext(context), &cq->db); + ib_umem_release(cq->buf.umem); +} + +static void init_cq_buf(struct mlx5_ib_cq *cq, int nent) +{ + int i; + void *cqe; + struct mlx5_cqe64 *cqe64; + + for (i = 0; i < nent; i++) { + cqe = get_cqe(cq, i); + cqe64 = (cq->buf.cqe_size == 64) ? cqe : cqe + 64; + cqe64->op_own = 0xf1; + } +} + +static int create_cq_kernel(struct mlx5_ib_dev *dev, struct mlx5_ib_cq *cq, + int entries, int cqe_size, + struct mlx5_create_cq_mbox_in **cqb, + int *index, int *inlen) +{ + int err; + + err = mlx5_db_alloc(&dev->mdev, &cq->db); + if (err) + return err; + + cq->mcq.set_ci_db = cq->db.db; + cq->mcq.arm_db = cq->db.db + 1; + *cq->mcq.set_ci_db = 0; + *cq->mcq.arm_db = 0; + cq->mcq.cqe_sz = cqe_size; + + err = alloc_cq_buf(dev, &cq->buf, entries, cqe_size); + if (err) + goto err_db; + + init_cq_buf(cq, entries); + + *inlen = sizeof(**cqb) + sizeof(*(*cqb)->pas) * cq->buf.buf.npages; + *cqb = mlx5_vzalloc(*inlen); + if (!*cqb) { + err = -ENOMEM; + goto err_buf; + } + mlx5_fill_page_array(&cq->buf.buf, (*cqb)->pas); + + (*cqb)->ctx.log_pg_sz = cq->buf.buf.page_shift - PAGE_SHIFT; + *index = dev->mdev.priv.uuari.uars[0].index; + + return 0; + +err_buf: + free_cq_buf(dev, &cq->buf); + +err_db: + mlx5_db_free(&dev->mdev, &cq->db); + return err; +} + +static void destroy_cq_kernel(struct mlx5_ib_dev *dev, struct mlx5_ib_cq *cq) +{ + free_cq_buf(dev, &cq->buf); + mlx5_db_free(&dev->mdev, &cq->db); +} + +struct ib_cq *mlx5_ib_create_cq(struct ib_device *ibdev, int entries, + int vector, struct ib_ucontext *context, + struct ib_udata *udata) +{ + struct mlx5_create_cq_mbox_in *cqb = NULL; + struct mlx5_ib_dev *dev = to_mdev(ibdev); + struct mlx5_ib_cq *cq; + int uninitialized_var(index); + int uninitialized_var(inlen); + int cqe_size; + int irqn; + int eqn; + int err; + + entries = roundup_pow_of_two(entries + 1); + if (entries < 1 || entries > dev->mdev.caps.max_cqes) + return ERR_PTR(-EINVAL); + + cq = kzalloc(sizeof(*cq), GFP_KERNEL); + if (!cq) + return ERR_PTR(-ENOMEM); + + cq->ibcq.cqe = entries - 1; + mutex_init(&cq->resize_mutex); + spin_lock_init(&cq->lock); + cq->resize_buf = NULL; + cq->resize_umem = NULL; + + if (context) { + err = create_cq_user(dev, udata, context, cq, entries, + &cqb, &cqe_size, &index, &inlen); + if (err) + goto err_create; + } else { + /* for now choose 64 bytes till we have a proper interface */ + cqe_size = 64; + err = create_cq_kernel(dev, cq, entries, cqe_size, &cqb, + &index, &inlen); + if (err) + goto err_create; + } + + cq->cqe_size = cqe_size; + cqb->ctx.cqe_sz_flags = cqe_sz_to_mlx_sz(cqe_size) << 5; + cqb->ctx.log_sz_usr_page = cpu_to_be32((ilog2(entries) << 24) | index); + err = mlx5_vector2eqn(dev, vector, &eqn, &irqn); + if (err) + goto err_cqb; + + cqb->ctx.c_eqn = cpu_to_be16(eqn); + cqb->ctx.db_record_addr = cpu_to_be64(cq->db.dma); + + err = mlx5_core_create_cq(&dev->mdev, &cq->mcq, cqb, inlen); + if (err) + goto err_cqb; + + mlx5_ib_dbg(dev, "cqn 0x%x\n", cq->mcq.cqn); + cq->mcq.irqn = irqn; + cq->mcq.comp = mlx5_ib_cq_comp; + cq->mcq.event = mlx5_ib_cq_event; + + if (context) + if (ib_copy_to_udata(udata, &cq->mcq.cqn, sizeof(__u32))) { + err = -EFAULT; + goto err_cmd; + } + + + mlx5_vfree(cqb); + return &cq->ibcq; + +err_cmd: + mlx5_core_destroy_cq(&dev->mdev, &cq->mcq); + +err_cqb: + mlx5_vfree(cqb); + if (context) + destroy_cq_user(cq, context); + else + destroy_cq_kernel(dev, cq); + +err_create: + kfree(cq); + + return ERR_PTR(err); +} + + +int mlx5_ib_destroy_cq(struct ib_cq *cq) +{ + struct mlx5_ib_dev *dev = to_mdev(cq->device); + struct mlx5_ib_cq *mcq = to_mcq(cq); + struct ib_ucontext *context = NULL; + + if (cq->uobject) + context = cq->uobject->context; + + mlx5_core_destroy_cq(&dev->mdev, &mcq->mcq); + if (context) + destroy_cq_user(mcq, context); + else + destroy_cq_kernel(dev, mcq); + + kfree(mcq); + + return 0; +} + +static int is_equal_rsn(struct mlx5_cqe64 *cqe64, struct mlx5_ib_srq *srq, + u32 rsn) +{ + u32 lrsn; + + if (srq) + lrsn = be32_to_cpu(cqe64->srqn) & 0xffffff; + else + lrsn = be32_to_cpu(cqe64->sop_drop_qpn) & 0xffffff; + + return rsn == lrsn; +} + +void __mlx5_ib_cq_clean(struct mlx5_ib_cq *cq, u32 rsn, struct mlx5_ib_srq *srq) +{ + struct mlx5_cqe64 *cqe64, *dest64; + void *cqe, *dest; + u32 prod_index; + int nfreed = 0; + u8 owner_bit; + + if (!cq) + return; + + /* First we need to find the current producer index, so we + * know where to start cleaning from. It doesn't matter if HW + * adds new entries after this loop -- the QP we're worried + * about is already in RESET, so the new entries won't come + * from our QP and therefore don't need to be checked. + */ + for (prod_index = cq->mcq.cons_index; get_sw_cqe(cq, prod_index); prod_index++) + if (prod_index == cq->mcq.cons_index + cq->ibcq.cqe) + break; + + /* Now sweep backwards through the CQ, removing CQ entries + * that match our QP by copying older entries on top of them. + */ + while ((int) --prod_index - (int) cq->mcq.cons_index >= 0) { + cqe = get_cqe(cq, prod_index & cq->ibcq.cqe); + cqe64 = (cq->mcq.cqe_sz == 64) ? cqe : cqe + 64; + if (is_equal_rsn(cqe64, srq, rsn)) { + if (srq) + mlx5_ib_free_srq_wqe(srq, be16_to_cpu(cqe64->wqe_counter)); + ++nfreed; + } else if (nfreed) { + dest = get_cqe(cq, (prod_index + nfreed) & cq->ibcq.cqe); + dest64 = (cq->mcq.cqe_sz == 64) ? dest : dest + 64; + owner_bit = dest64->op_own & MLX5_CQE_OWNER_MASK; + memcpy(dest, cqe, cq->mcq.cqe_sz); + dest64->op_own = owner_bit | + (dest64->op_own & ~MLX5_CQE_OWNER_MASK); + } + } + + if (nfreed) { + cq->mcq.cons_index += nfreed; + /* Make sure update of buffer contents is done before + * updating consumer index. + */ + wmb(); + mlx5_cq_set_ci(&cq->mcq); + } +} + +void mlx5_ib_cq_clean(struct mlx5_ib_cq *cq, u32 qpn, struct mlx5_ib_srq *srq) +{ + if (!cq) + return; + + spin_lock_irq(&cq->lock); + __mlx5_ib_cq_clean(cq, qpn, srq); + spin_unlock_irq(&cq->lock); +} + +int mlx5_ib_modify_cq(struct ib_cq *cq, u16 cq_count, u16 cq_period) +{ + return -ENOSYS; +} + +int mlx5_ib_resize_cq(struct ib_cq *ibcq, int entries, struct ib_udata *udata) +{ + return -ENOSYS; +} + +int mlx5_ib_get_cqe_size(struct mlx5_ib_dev *dev, struct ib_cq *ibcq) +{ + struct mlx5_ib_cq *cq; + + if (!ibcq) + return 128; + + cq = to_mcq(ibcq); + return cq->cqe_size; +} diff --git a/drivers/infiniband/hw/mlx5/doorbell.c b/drivers/infiniband/hw/mlx5/doorbell.c new file mode 100644 index 000000000000..256a23344f28 --- /dev/null +++ b/drivers/infiniband/hw/mlx5/doorbell.c @@ -0,0 +1,100 @@ +/* + * Copyright (c) 2013, Mellanox Technologies inc. All rights reserved. + * + * This software is available to you under a choice of one of two + * licenses. You may choose to be licensed under the terms of the GNU + * General Public License (GPL) Version 2, available from the file + * COPYING in the main directory of this source tree, or the + * OpenIB.org BSD license below: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * - Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * - Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +#include <linux/kref.h> +#include <linux/slab.h> +#include <rdma/ib_umem.h> + +#include "mlx5_ib.h" + +struct mlx5_ib_user_db_page { + struct list_head list; + struct ib_umem *umem; + unsigned long user_virt; + int refcnt; +}; + +int mlx5_ib_db_map_user(struct mlx5_ib_ucontext *context, unsigned long virt, + struct mlx5_db *db) +{ + struct mlx5_ib_user_db_page *page; + struct ib_umem_chunk *chunk; + int err = 0; + + mutex_lock(&context->db_page_mutex); + + list_for_each_entry(page, &context->db_page_list, list) + if (page->user_virt == (virt & PAGE_MASK)) + goto found; + + page = kmalloc(sizeof(*page), GFP_KERNEL); + if (!page) { + err = -ENOMEM; + goto out; + } + + page->user_virt = (virt & PAGE_MASK); + page->refcnt = 0; + page->umem = ib_umem_get(&context->ibucontext, virt & PAGE_MASK, + PAGE_SIZE, 0, 0); + if (IS_ERR(page->umem)) { + err = PTR_ERR(page->umem); + kfree(page); + goto out; + } + + list_add(&page->list, &context->db_page_list); + +found: + chunk = list_entry(page->umem->chunk_list.next, struct ib_umem_chunk, list); + db->dma = sg_dma_address(chunk->page_list) + (virt & ~PAGE_MASK); + db->u.user_page = page; + ++page->refcnt; + +out: + mutex_unlock(&context->db_page_mutex); + + return err; +} + +void mlx5_ib_db_unmap_user(struct mlx5_ib_ucontext *context, struct mlx5_db *db) +{ + mutex_lock(&context->db_page_mutex); + + if (!--db->u.user_page->refcnt) { + list_del(&db->u.user_page->list); + ib_umem_release(db->u.user_page->umem); + kfree(db->u.user_page); + } + + mutex_unlock(&context->db_page_mutex); +} diff --git a/drivers/infiniband/hw/mlx5/mad.c b/drivers/infiniband/hw/mlx5/mad.c new file mode 100644 index 000000000000..5c8938be0e08 --- /dev/null +++ b/drivers/infiniband/hw/mlx5/mad.c @@ -0,0 +1,139 @@ +/* + * Copyright (c) 2013, Mellanox Technologies inc. All rights reserved. + * + * This software is available to you under a choice of one of two + * licenses. You may choose to be licensed under the terms of the GNU + * General Public License (GPL) Version 2, available from the file + * COPYING in the main directory of this source tree, or the + * OpenIB.org BSD license below: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * - Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * - Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +#include <linux/mlx5/cmd.h> +#include <rdma/ib_mad.h> +#include <rdma/ib_smi.h> +#include "mlx5_ib.h" + +enum { + MLX5_IB_VENDOR_CLASS1 = 0x9, + MLX5_IB_VENDOR_CLASS2 = 0xa +}; + +int mlx5_MAD_IFC(struct mlx5_ib_dev *dev, int ignore_mkey, int ignore_bkey, + int port, struct ib_wc *in_wc, struct ib_grh *in_grh, + void *in_mad, void *response_mad) +{ + u8 op_modifier = 0; + + /* Key check traps can't be generated unless we have in_wc to + * tell us where to send the trap. + */ + if (ignore_mkey || !in_wc) + op_modifier |= 0x1; + if (ignore_bkey || !in_wc) + op_modifier |= 0x2; + + return mlx5_core_mad_ifc(&dev->mdev, in_mad, response_mad, op_modifier, port); +} + +int mlx5_ib_process_mad(struct ib_device *ibdev, int mad_flags, u8 port_num, + struct ib_wc *in_wc, struct ib_grh *in_grh, + struct ib_mad *in_mad, struct ib_mad *out_mad) +{ + u16 slid; + int err; + + slid = in_wc ? in_wc->slid : be16_to_cpu(IB_LID_PERMISSIVE); + + if (in_mad->mad_hdr.method == IB_MGMT_METHOD_TRAP && slid == 0) + return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED; + + if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED || + in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) { + if (in_mad->mad_hdr.method != IB_MGMT_METHOD_GET && + in_mad->mad_hdr.method != IB_MGMT_METHOD_SET && + in_mad->mad_hdr.method != IB_MGMT_METHOD_TRAP_REPRESS) + return IB_MAD_RESULT_SUCCESS; + + /* Don't process SMInfo queries -- the SMA can't handle them. + */ + if (in_mad->mad_hdr.attr_id == IB_SMP_ATTR_SM_INFO) + return IB_MAD_RESULT_SUCCESS; + } else if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_PERF_MGMT || + in_mad->mad_hdr.mgmt_class == MLX5_IB_VENDOR_CLASS1 || + in_mad->mad_hdr.mgmt_class == MLX5_IB_VENDOR_CLASS2 || + in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_CONG_MGMT) { + if (in_mad->mad_hdr.method != IB_MGMT_METHOD_GET && + in_mad->mad_hdr.method != IB_MGMT_METHOD_SET) + return IB_MAD_RESULT_SUCCESS; + } else { + return IB_MAD_RESULT_SUCCESS; + } + + err = mlx5_MAD_IFC(to_mdev(ibdev), + mad_flags & IB_MAD_IGNORE_MKEY, + mad_flags & IB_MAD_IGNORE_BKEY, + port_num, in_wc, in_grh, in_mad, out_mad); + if (err) + return IB_MAD_RESULT_FAILURE; + + /* set return bit in status of directed route responses */ + if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) + out_mad->mad_hdr.status |= cpu_to_be16(1 << 15); + + if (in_mad->mad_hdr.method == IB_MGMT_METHOD_TRAP_REPRESS) + /* no response for trap repress */ + return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED; + + return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY; +} + +int mlx5_query_ext_port_caps(struct mlx5_ib_dev *dev, u8 port) +{ + struct ib_smp *in_mad = NULL; + struct ib_smp *out_mad = NULL; + int err = -ENOMEM; + u16 packet_error; + + in_mad = kzalloc(sizeof(*in_mad), GFP_KERNEL); + out_mad = kmalloc(sizeof(*out_mad), GFP_KERNEL); + if (!in_mad || !out_mad) + goto out; + + init_query_mad(in_mad); + in_mad->attr_id = MLX5_ATTR_EXTENDED_PORT_INFO; + in_mad->attr_mod = cpu_to_be32(port); + + err = mlx5_MAD_IFC(dev, 1, 1, 1, NULL, NULL, in_mad, out_mad); + + packet_error = be16_to_cpu(out_mad->status); + + dev->mdev.caps.ext_port_cap[port - 1] = (!err && !packet_error) ? + MLX_EXT_PORT_CAP_FLAG_EXTENDED_PORT_INFO : 0; + +out: + kfree(in_mad); + kfree(out_mad); + return err; +} diff --git a/drivers/infiniband/hw/mlx5/main.c b/drivers/infiniband/hw/mlx5/main.c new file mode 100644 index 000000000000..6b1007f9bc29 --- /dev/null +++ b/drivers/infiniband/hw/mlx5/main.c @@ -0,0 +1,1504 @@ +/* + * Copyright (c) 2013, Mellanox Technologies inc. All rights reserved. + * + * This software is available to you under a choice of one of two + * licenses. You may choose to be licensed under the terms of the GNU + * General Public License (GPL) Version 2, available from the file + * COPYING in the main directory of this source tree, or the + * OpenIB.org BSD license below: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * - Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * - Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +#include <asm-generic/kmap_types.h> +#include <linux/module.h> +#include <linux/init.h> +#include <linux/errno.h> +#include <linux/pci.h> +#include <linux/dma-mapping.h> +#include <linux/slab.h> +#include <linux/io-mapping.h> +#include <linux/sched.h> +#include <rdma/ib_user_verbs.h> +#include <rdma/ib_smi.h> +#include <rdma/ib_umem.h> +#include "user.h" +#include "mlx5_ib.h" + +#define DRIVER_NAME "mlx5_ib" +#define DRIVER_VERSION "1.0" +#define DRIVER_RELDATE "June 2013" + +MODULE_AUTHOR("Eli Cohen <eli@mellanox.com>"); +MODULE_DESCRIPTION("Mellanox Connect-IB HCA IB driver"); +MODULE_LICENSE("Dual BSD/GPL"); +MODULE_VERSION(DRIVER_VERSION); + +static int prof_sel = 2; +module_param_named(prof_sel, prof_sel, int, 0444); +MODULE_PARM_DESC(prof_sel, "profile selector. Valid range 0 - 2"); + +static char mlx5_version[] = + DRIVER_NAME ": Mellanox Connect-IB Infiniband driver v" + DRIVER_VERSION " (" DRIVER_RELDATE ")\n"; + +struct mlx5_profile profile[] = { + [0] = { + .mask = 0, + }, + [1] = { + .mask = MLX5_PROF_MASK_QP_SIZE, + .log_max_qp = 12, + }, + [2] = { + .mask = MLX5_PROF_MASK_QP_SIZE | + MLX5_PROF_MASK_MR_CACHE, + .log_max_qp = 17, + .mr_cache[0] = { + .size = 500, + .limit = 250 + }, + .mr_cache[1] = { + .size = 500, + .limit = 250 + }, + .mr_cache[2] = { + .size = 500, + .limit = 250 + }, + .mr_cache[3] = { + .size = 500, + .limit = 250 + }, + .mr_cache[4] = { + .size = 500, + .limit = 250 + }, + .mr_cache[5] = { + .size = 500, + .limit = 250 + }, + .mr_cache[6] = { + .size = 500, + .limit = 250 + }, + .mr_cache[7] = { + .size = 500, + .limit = 250 + }, + .mr_cache[8] = { + .size = 500, + .limit = 250 + }, + .mr_cache[9] = { + .size = 500, + .limit = 250 + }, + .mr_cache[10] = { + .size = 500, + .limit = 250 + }, + .mr_cache[11] = { + .size = 500, + .limit = 250 + }, + .mr_cache[12] = { + .size = 64, + .limit = 32 + }, + .mr_cache[13] = { + .size = 32, + .limit = 16 + }, + .mr_cache[14] = { + .size = 16, + .limit = 8 + }, + .mr_cache[15] = { + .size = 8, + .limit = 4 + }, + }, +}; + +int mlx5_vector2eqn(struct mlx5_ib_dev *dev, int vector, int *eqn, int *irqn) +{ + struct mlx5_eq_table *table = &dev->mdev.priv.eq_table; + struct mlx5_eq *eq, *n; + int err = -ENOENT; + + spin_lock(&table->lock); + list_for_each_entry_safe(eq, n, &dev->eqs_list, list) { + if (eq->index == vector) { + *eqn = eq->eqn; + *irqn = eq->irqn; + err = 0; + break; + } + } + spin_unlock(&table->lock); + + return err; +} + +static int alloc_comp_eqs(struct mlx5_ib_dev *dev) +{ + struct mlx5_eq_table *table = &dev->mdev.priv.eq_table; + struct mlx5_eq *eq, *n; + int ncomp_vec; + int nent; + int err; + int i; + + INIT_LIST_HEAD(&dev->eqs_list); + ncomp_vec = table->num_comp_vectors; + nent = MLX5_COMP_EQ_SIZE; + for (i = 0; i < ncomp_vec; i++) { + eq = kzalloc(sizeof(*eq), GFP_KERNEL); + if (!eq) { + err = -ENOMEM; + goto clean; + } + + snprintf(eq->name, MLX5_MAX_EQ_NAME, "mlx5_comp%d", i); + err = mlx5_create_map_eq(&dev->mdev, eq, + i + MLX5_EQ_VEC_COMP_BASE, nent, 0, + eq->name, + &dev->mdev.priv.uuari.uars[0]); + if (err) { + kfree(eq); + goto clean; + } + mlx5_ib_dbg(dev, "allocated completion EQN %d\n", eq->eqn); + eq->index = i; + spin_lock(&table->lock); + list_add_tail(&eq->list, &dev->eqs_list); + spin_unlock(&table->lock); + } + + dev->num_comp_vectors = ncomp_vec; + return 0; + +clean: + spin_lock(&table->lock); + list_for_each_entry_safe(eq, n, &dev->eqs_list, list) { + list_del(&eq->list); + spin_unlock(&table->lock); + if (mlx5_destroy_unmap_eq(&dev->mdev, eq)) + mlx5_ib_warn(dev, "failed to destroy EQ 0x%x\n", eq->eqn); + kfree(eq); + spin_lock(&table->lock); + } + spin_unlock(&table->lock); + return err; +} + +static void free_comp_eqs(struct mlx5_ib_dev *dev) +{ + struct mlx5_eq_table *table = &dev->mdev.priv.eq_table; + struct mlx5_eq *eq, *n; + + spin_lock(&table->lock); + list_for_each_entry_safe(eq, n, &dev->eqs_list, list) { + list_del(&eq->list); + spin_unlock(&table->lock); + if (mlx5_destroy_unmap_eq(&dev->mdev, eq)) + mlx5_ib_warn(dev, "failed to destroy EQ 0x%x\n", eq->eqn); + kfree(eq); + spin_lock(&table->lock); + } + spin_unlock(&table->lock); +} + +static int mlx5_ib_query_device(struct ib_device *ibdev, + struct ib_device_attr *props) +{ + struct mlx5_ib_dev *dev = to_mdev(ibdev); + struct ib_smp *in_mad = NULL; + struct ib_smp *out_mad = NULL; + int err = -ENOMEM; + int max_rq_sg; + int max_sq_sg; + u64 flags; + + in_mad = kzalloc(sizeof(*in_mad), GFP_KERNEL); + out_mad = kmalloc(sizeof(*out_mad), GFP_KERNEL); + if (!in_mad || !out_mad) + goto out; + + init_query_mad(in_mad); + in_mad->attr_id = IB_SMP_ATTR_NODE_INFO; + + err = mlx5_MAD_IFC(to_mdev(ibdev), 1, 1, 1, NULL, NULL, in_mad, out_mad); + if (err) + goto out; + + memset(props, 0, sizeof(*props)); + + props->fw_ver = ((u64)fw_rev_maj(&dev->mdev) << 32) | + (fw_rev_min(&dev->mdev) << 16) | + fw_rev_sub(&dev->mdev); + props->device_cap_flags = IB_DEVICE_CHANGE_PHY_PORT | + IB_DEVICE_PORT_ACTIVE_EVENT | + IB_DEVICE_SYS_IMAGE_GUID | + IB_DEVICE_RC_RNR_NAK_GEN | + IB_DEVICE_BLOCK_MULTICAST_LOOPBACK; + flags = dev->mdev.caps.flags; + if (flags & MLX5_DEV_CAP_FLAG_BAD_PKEY_CNTR) + props->device_cap_flags |= IB_DEVICE_BAD_PKEY_CNTR; + if (flags & MLX5_DEV_CAP_FLAG_BAD_QKEY_CNTR) + props->device_cap_flags |= IB_DEVICE_BAD_QKEY_CNTR; + if (flags & MLX5_DEV_CAP_FLAG_APM) + props->device_cap_flags |= IB_DEVICE_AUTO_PATH_MIG; + props->device_cap_flags |= IB_DEVICE_LOCAL_DMA_LKEY; + if (flags & MLX5_DEV_CAP_FLAG_XRC) + props->device_cap_flags |= IB_DEVICE_XRC; + props->device_cap_flags |= IB_DEVICE_MEM_MGT_EXTENSIONS; + + props->vendor_id = be32_to_cpup((__be32 *)(out_mad->data + 36)) & + 0xffffff; + props->vendor_part_id = be16_to_cpup((__be16 *)(out_mad->data + 30)); + props->hw_ver = be32_to_cpup((__be32 *)(out_mad->data + 32)); + memcpy(&props->sys_image_guid, out_mad->data + 4, 8); + + props->max_mr_size = ~0ull; + props->page_size_cap = dev->mdev.caps.min_page_sz; + props->max_qp = 1 << dev->mdev.caps.log_max_qp; + props->max_qp_wr = dev->mdev.caps.max_wqes; + max_rq_sg = dev->mdev.caps.max_rq_desc_sz / sizeof(struct mlx5_wqe_data_seg); + max_sq_sg = (dev->mdev.caps.max_sq_desc_sz - sizeof(struct mlx5_wqe_ctrl_seg)) / + sizeof(struct mlx5_wqe_data_seg); + props->max_sge = min(max_rq_sg, max_sq_sg); + props->max_cq = 1 << dev->mdev.caps.log_max_cq; + props->max_cqe = dev->mdev.caps.max_cqes - 1; + props->max_mr = 1 << dev->mdev.caps.log_max_mkey; + props->max_pd = 1 << dev->mdev.caps.log_max_pd; + props->max_qp_rd_atom = dev->mdev.caps.max_ra_req_qp; + props->max_qp_init_rd_atom = dev->mdev.caps.max_ra_res_qp; + props->max_res_rd_atom = props->max_qp_rd_atom * props->max_qp; + props->max_srq = 1 << dev->mdev.caps.log_max_srq; + props->max_srq_wr = dev->mdev.caps.max_srq_wqes - 1; + props->max_srq_sge = max_rq_sg - 1; + props->max_fast_reg_page_list_len = (unsigned int)-1; + props->local_ca_ack_delay = dev->mdev.caps.local_ca_ack_delay; + props->atomic_cap = dev->mdev.caps.flags & MLX5_DEV_CAP_FLAG_ATOMIC ? + IB_ATOMIC_HCA : IB_ATOMIC_NONE; + props->masked_atomic_cap = IB_ATOMIC_HCA; + props->max_pkeys = be16_to_cpup((__be16 *)(out_mad->data + 28)); + props->max_mcast_grp = 1 << dev->mdev.caps.log_max_mcg; + props->max_mcast_qp_attach = dev->mdev.caps.max_qp_mcg; + props->max_total_mcast_qp_attach = props->max_mcast_qp_attach * + props->max_mcast_grp; + props->max_map_per_fmr = INT_MAX; /* no limit in ConnectIB */ + +out: + kfree(in_mad); + kfree(out_mad); + + return err; +} + +int mlx5_ib_query_port(struct ib_device *ibdev, u8 port, + struct ib_port_attr *props) +{ + struct mlx5_ib_dev *dev = to_mdev(ibdev); + struct ib_smp *in_mad = NULL; + struct ib_smp *out_mad = NULL; + int ext_active_speed; + int err = -ENOMEM; + + if (port < 1 || port > dev->mdev.caps.num_ports) { + mlx5_ib_warn(dev, "invalid port number %d\n", port); + return -EINVAL; + } + + in_mad = kzalloc(sizeof(*in_mad), GFP_KERNEL); + out_mad = kmalloc(sizeof(*out_mad), GFP_KERNEL); + if (!in_mad || !out_mad) + goto out; + + memset(props, 0, sizeof(*props)); + + init_query_mad(in_mad); + in_mad->attr_id = IB_SMP_ATTR_PORT_INFO; + in_mad->attr_mod = cpu_to_be32(port); + + err = mlx5_MAD_IFC(dev, 1, 1, port, NULL, NULL, in_mad, out_mad); + if (err) { + mlx5_ib_warn(dev, "err %d\n", err); + goto out; + } + + + props->lid = be16_to_cpup((__be16 *)(out_mad->data + 16)); + props->lmc = out_mad->data[34] & 0x7; + props->sm_lid = be16_to_cpup((__be16 *)(out_mad->data + 18)); + props->sm_sl = out_mad->data[36] & 0xf; + props->state = out_mad->data[32] & 0xf; + props->phys_state = out_mad->data[33] >> 4; + props->port_cap_flags = be32_to_cpup((__be32 *)(out_mad->data + 20)); + props->gid_tbl_len = out_mad->data[50]; + props->max_msg_sz = 1 << to_mdev(ibdev)->mdev.caps.log_max_msg; + props->pkey_tbl_len = to_mdev(ibdev)->mdev.caps.port[port - 1].pkey_table_len; + props->bad_pkey_cntr = be16_to_cpup((__be16 *)(out_mad->data + 46)); + props->qkey_viol_cntr = be16_to_cpup((__be16 *)(out_mad->data + 48)); + props->active_width = out_mad->data[31] & 0xf; + props->active_speed = out_mad->data[35] >> 4; + props->max_mtu = out_mad->data[41] & 0xf; + props->active_mtu = out_mad->data[36] >> 4; + props->subnet_timeout = out_mad->data[51] & 0x1f; + props->max_vl_num = out_mad->data[37] >> 4; + props->init_type_reply = out_mad->data[41] >> 4; + + /* Check if extended speeds (EDR/FDR/...) are supported */ + if (props->port_cap_flags & IB_PORT_EXTENDED_SPEEDS_SUP) { + ext_active_speed = out_mad->data[62] >> 4; + + switch (ext_active_speed) { + case 1: + props->active_speed = 16; /* FDR */ + break; + case 2: + props->active_speed = 32; /* EDR */ + break; + } + } + + /* If reported active speed is QDR, check if is FDR-10 */ + if (props->active_speed == 4) { + if (dev->mdev.caps.ext_port_cap[port - 1] & + MLX_EXT_PORT_CAP_FLAG_EXTENDED_PORT_INFO) { + init_query_mad(in_mad); + in_mad->attr_id = MLX5_ATTR_EXTENDED_PORT_INFO; + in_mad->attr_mod = cpu_to_be32(port); + + err = mlx5_MAD_IFC(dev, 1, 1, port, + NULL, NULL, in_mad, out_mad); + if (err) + goto out; + + /* Checking LinkSpeedActive for FDR-10 */ + if (out_mad->data[15] & 0x1) + props->active_speed = 8; + } + } + +out: + kfree(in_mad); + kfree(out_mad); + + return err; +} + +static int mlx5_ib_query_gid(struct ib_device *ibdev, u8 port, int index, + union ib_gid *gid) +{ + struct ib_smp *in_mad = NULL; + struct ib_smp *out_mad = NULL; + int err = -ENOMEM; + + in_mad = kzalloc(sizeof(*in_mad), GFP_KERNEL); + out_mad = kmalloc(sizeof(*out_mad), GFP_KERNEL); + if (!in_mad || !out_mad) + goto out; + + init_query_mad(in_mad); + in_mad->attr_id = IB_SMP_ATTR_PORT_INFO; + in_mad->attr_mod = cpu_to_be32(port); + + err = mlx5_MAD_IFC(to_mdev(ibdev), 1, 1, port, NULL, NULL, in_mad, out_mad); + if (err) + goto out; + + memcpy(gid->raw, out_mad->data + 8, 8); + + init_query_mad(in_mad); + in_mad->attr_id = IB_SMP_ATTR_GUID_INFO; + in_mad->attr_mod = cpu_to_be32(index / 8); + + err = mlx5_MAD_IFC(to_mdev(ibdev), 1, 1, port, NULL, NULL, in_mad, out_mad); + if (err) + goto out; + + memcpy(gid->raw + 8, out_mad->data + (index % 8) * 8, 8); + +out: + kfree(in_mad); + kfree(out_mad); + return err; +} + +static int mlx5_ib_query_pkey(struct ib_device *ibdev, u8 port, u16 index, + u16 *pkey) +{ + struct ib_smp *in_mad = NULL; + struct ib_smp *out_mad = NULL; + int err = -ENOMEM; + + in_mad = kzalloc(sizeof(*in_mad), GFP_KERNEL); + out_mad = kmalloc(sizeof(*out_mad), GFP_KERNEL); + if (!in_mad || !out_mad) + goto out; + + init_query_mad(in_mad); + in_mad->attr_id = IB_SMP_ATTR_PKEY_TABLE; + in_mad->attr_mod = cpu_to_be32(index / 32); + + err = mlx5_MAD_IFC(to_mdev(ibdev), 1, 1, port, NULL, NULL, in_mad, out_mad); + if (err) + goto out; + + *pkey = be16_to_cpu(((__be16 *)out_mad->data)[index % 32]); + +out: + kfree(in_mad); + kfree(out_mad); + return err; +} + +struct mlx5_reg_node_desc { + u8 desc[64]; +}; + +static int mlx5_ib_modify_device(struct ib_device *ibdev, int mask, + struct ib_device_modify *props) +{ + struct mlx5_ib_dev *dev = to_mdev(ibdev); + struct mlx5_reg_node_desc in; + struct mlx5_reg_node_desc out; + int err; + + if (mask & ~IB_DEVICE_MODIFY_NODE_DESC) + return -EOPNOTSUPP; + + if (!(mask & IB_DEVICE_MODIFY_NODE_DESC)) + return 0; + + /* + * If possible, pass node desc to FW, so it can generate + * a 144 trap. If cmd fails, just ignore. + */ + memcpy(&in, props->node_desc, 64); + err = mlx5_core_access_reg(&dev->mdev, &in, sizeof(in), &out, + sizeof(out), MLX5_REG_NODE_DESC, 0, 1); + if (err) + return err; + + memcpy(ibdev->node_desc, props->node_desc, 64); + + return err; +} + +static int mlx5_ib_modify_port(struct ib_device *ibdev, u8 port, int mask, + struct ib_port_modify *props) +{ + struct mlx5_ib_dev *dev = to_mdev(ibdev); + struct ib_port_attr attr; + u32 tmp; + int err; + + mutex_lock(&dev->cap_mask_mutex); + + err = mlx5_ib_query_port(ibdev, port, &attr); + if (err) + goto out; + + tmp = (attr.port_cap_flags | props->set_port_cap_mask) & + ~props->clr_port_cap_mask; + + err = mlx5_set_port_caps(&dev->mdev, port, tmp); + +out: + mutex_unlock(&dev->cap_mask_mutex); + return err; +} + +static struct ib_ucontext *mlx5_ib_alloc_ucontext(struct ib_device *ibdev, + struct ib_udata *udata) +{ + struct mlx5_ib_dev *dev = to_mdev(ibdev); + struct mlx5_ib_alloc_ucontext_req req; + struct mlx5_ib_alloc_ucontext_resp resp; + struct mlx5_ib_ucontext *context; + struct mlx5_uuar_info *uuari; + struct mlx5_uar *uars; + int num_uars; + int uuarn; + int err; + int i; + + if (!dev->ib_active) + return ERR_PTR(-EAGAIN); + + err = ib_copy_from_udata(&req, udata, sizeof(req)); + if (err) + return ERR_PTR(err); + + if (req.total_num_uuars > MLX5_MAX_UUARS) + return ERR_PTR(-ENOMEM); + + if (req.total_num_uuars == 0) + return ERR_PTR(-EINVAL); + + req.total_num_uuars = ALIGN(req.total_num_uuars, MLX5_BF_REGS_PER_PAGE); + if (req.num_low_latency_uuars > req.total_num_uuars - 1) + return ERR_PTR(-EINVAL); + + num_uars = req.total_num_uuars / MLX5_BF_REGS_PER_PAGE; + resp.qp_tab_size = 1 << dev->mdev.caps.log_max_qp; + resp.bf_reg_size = dev->mdev.caps.bf_reg_size; + resp.cache_line_size = L1_CACHE_BYTES; + resp.max_sq_desc_sz = dev->mdev.caps.max_sq_desc_sz; + resp.max_rq_desc_sz = dev->mdev.caps.max_rq_desc_sz; + resp.max_send_wqebb = dev->mdev.caps.max_wqes; + resp.max_recv_wr = dev->mdev.caps.max_wqes; + resp.max_srq_recv_wr = dev->mdev.caps.max_srq_wqes; + + context = kzalloc(sizeof(*context), GFP_KERNEL); + if (!context) + return ERR_PTR(-ENOMEM); + + uuari = &context->uuari; + mutex_init(&uuari->lock); + uars = kcalloc(num_uars, sizeof(*uars), GFP_KERNEL); + if (!uars) { + err = -ENOMEM; + goto out_ctx; + } + + uuari->bitmap = kcalloc(BITS_TO_LONGS(req.total_num_uuars), + sizeof(*uuari->bitmap), + GFP_KERNEL); + if (!uuari->bitmap) { + err = -ENOMEM; + goto out_uar_ctx; + } + /* + * clear all fast path uuars + */ + for (i = 0; i < req.total_num_uuars; i++) { + uuarn = i & 3; + if (uuarn == 2 || uuarn == 3) + set_bit(i, uuari->bitmap); + } + + uuari->count = kcalloc(req.total_num_uuars, sizeof(*uuari->count), GFP_KERNEL); + if (!uuari->count) { + err = -ENOMEM; + goto out_bitmap; + } + + for (i = 0; i < num_uars; i++) { + err = mlx5_cmd_alloc_uar(&dev->mdev, &uars[i].index); + if (err) + goto out_count; + } + + INIT_LIST_HEAD(&context->db_page_list); + mutex_init(&context->db_page_mutex); + + resp.tot_uuars = req.total_num_uuars; + resp.num_ports = dev->mdev.caps.num_ports; + err = ib_copy_to_udata(udata, &resp, sizeof(resp)); + if (err) + goto out_uars; + + uuari->num_low_latency_uuars = req.num_low_latency_uuars; + uuari->uars = uars; + uuari->num_uars = num_uars; + return &context->ibucontext; + +out_uars: + for (i--; i >= 0; i--) + mlx5_cmd_free_uar(&dev->mdev, uars[i].index); +out_count: + kfree(uuari->count); + +out_bitmap: + kfree(uuari->bitmap); + +out_uar_ctx: + kfree(uars); + +out_ctx: + kfree(context); + return ERR_PTR(err); +} + +static int mlx5_ib_dealloc_ucontext(struct ib_ucontext *ibcontext) +{ + struct mlx5_ib_ucontext *context = to_mucontext(ibcontext); + struct mlx5_ib_dev *dev = to_mdev(ibcontext->device); + struct mlx5_uuar_info *uuari = &context->uuari; + int i; + + for (i = 0; i < uuari->num_uars; i++) { + if (mlx5_cmd_free_uar(&dev->mdev, uuari->uars[i].index)) + mlx5_ib_warn(dev, "failed to free UAR 0x%x\n", uuari->uars[i].index); + } + + kfree(uuari->count); + kfree(uuari->bitmap); + kfree(uuari->uars); + kfree(context); + + return 0; +} + +static phys_addr_t uar_index2pfn(struct mlx5_ib_dev *dev, int index) +{ + return (pci_resource_start(dev->mdev.pdev, 0) >> PAGE_SHIFT) + index; +} + +static int get_command(unsigned long offset) +{ + return (offset >> MLX5_IB_MMAP_CMD_SHIFT) & MLX5_IB_MMAP_CMD_MASK; +} + +static int get_arg(unsigned long offset) +{ + return offset & ((1 << MLX5_IB_MMAP_CMD_SHIFT) - 1); +} + +static int get_index(unsigned long offset) +{ + return get_arg(offset); +} + +static int mlx5_ib_mmap(struct ib_ucontext *ibcontext, struct vm_area_struct *vma) +{ + struct mlx5_ib_ucontext *context = to_mucontext(ibcontext); + struct mlx5_ib_dev *dev = to_mdev(ibcontext->device); + struct mlx5_uuar_info *uuari = &context->uuari; + unsigned long command; + unsigned long idx; + phys_addr_t pfn; + + command = get_command(vma->vm_pgoff); + switch (command) { + case MLX5_IB_MMAP_REGULAR_PAGE: + if (vma->vm_end - vma->vm_start != PAGE_SIZE) + return -EINVAL; + + idx = get_index(vma->vm_pgoff); + pfn = uar_index2pfn(dev, uuari->uars[idx].index); + mlx5_ib_dbg(dev, "uar idx 0x%lx, pfn 0x%llx\n", idx, + (unsigned long long)pfn); + + if (idx >= uuari->num_uars) + return -EINVAL; + + vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot); + if (io_remap_pfn_range(vma, vma->vm_start, pfn, + PAGE_SIZE, vma->vm_page_prot)) + return -EAGAIN; + + mlx5_ib_dbg(dev, "mapped WC at 0x%lx, PA 0x%llx\n", + vma->vm_start, + (unsigned long long)pfn << PAGE_SHIFT); + break; + + case MLX5_IB_MMAP_GET_CONTIGUOUS_PAGES: + return -ENOSYS; + + default: + return -EINVAL; + } + + return 0; +} + +static int alloc_pa_mkey(struct mlx5_ib_dev *dev, u32 *key, u32 pdn) +{ + struct mlx5_create_mkey_mbox_in *in; + struct mlx5_mkey_seg *seg; + struct mlx5_core_mr mr; + int err; + + in = kzalloc(sizeof(*in), GFP_KERNEL); + if (!in) + return -ENOMEM; + + seg = &in->seg; + seg->flags = MLX5_PERM_LOCAL_READ | MLX5_ACCESS_MODE_PA; + seg->flags_pd = cpu_to_be32(pdn | MLX5_MKEY_LEN64); + seg->qpn_mkey7_0 = cpu_to_be32(0xffffff << 8); + seg->start_addr = 0; + + err = mlx5_core_create_mkey(&dev->mdev, &mr, in, sizeof(*in)); + if (err) { + mlx5_ib_warn(dev, "failed to create mkey, %d\n", err); + goto err_in; + } + + kfree(in); + *key = mr.key; + + return 0; + +err_in: + kfree(in); + + return err; +} + +static void free_pa_mkey(struct mlx5_ib_dev *dev, u32 key) +{ + struct mlx5_core_mr mr; + int err; + + memset(&mr, 0, sizeof(mr)); + mr.key = key; + err = mlx5_core_destroy_mkey(&dev->mdev, &mr); + if (err) + mlx5_ib_warn(dev, "failed to destroy mkey 0x%x\n", key); +} + +static struct ib_pd *mlx5_ib_alloc_pd(struct ib_device *ibdev, + struct ib_ucontext *context, + struct ib_udata *udata) +{ + struct mlx5_ib_alloc_pd_resp resp; + struct mlx5_ib_pd *pd; + int err; + + pd = kmalloc(sizeof(*pd), GFP_KERNEL); + if (!pd) + return ERR_PTR(-ENOMEM); + + err = mlx5_core_alloc_pd(&to_mdev(ibdev)->mdev, &pd->pdn); + if (err) { + kfree(pd); + return ERR_PTR(err); + } + + if (context) { + resp.pdn = pd->pdn; + if (ib_copy_to_udata(udata, &resp, sizeof(resp))) { + mlx5_core_dealloc_pd(&to_mdev(ibdev)->mdev, pd->pdn); + kfree(pd); + return ERR_PTR(-EFAULT); + } + } else { + err = alloc_pa_mkey(to_mdev(ibdev), &pd->pa_lkey, pd->pdn); + if (err) { + mlx5_core_dealloc_pd(&to_mdev(ibdev)->mdev, pd->pdn); + kfree(pd); + return ERR_PTR(err); + } + } + + return &pd->ibpd; +} + +static int mlx5_ib_dealloc_pd(struct ib_pd *pd) +{ + struct mlx5_ib_dev *mdev = to_mdev(pd->device); + struct mlx5_ib_pd *mpd = to_mpd(pd); + + if (!pd->uobject) + free_pa_mkey(mdev, mpd->pa_lkey); + + mlx5_core_dealloc_pd(&mdev->mdev, mpd->pdn); + kfree(mpd); + + return 0; +} + +static int mlx5_ib_mcg_attach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid) +{ + struct mlx5_ib_dev *dev = to_mdev(ibqp->device); + int err; + + err = mlx5_core_attach_mcg(&dev->mdev, gid, ibqp->qp_num); + if (err) + mlx5_ib_warn(dev, "failed attaching QPN 0x%x, MGID %pI6\n", + ibqp->qp_num, gid->raw); + + return err; +} + +static int mlx5_ib_mcg_detach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid) +{ + struct mlx5_ib_dev *dev = to_mdev(ibqp->device); + int err; + + err = mlx5_core_detach_mcg(&dev->mdev, gid, ibqp->qp_num); + if (err) + mlx5_ib_warn(dev, "failed detaching QPN 0x%x, MGID %pI6\n", + ibqp->qp_num, gid->raw); + + return err; +} + +static int init_node_data(struct mlx5_ib_dev *dev) +{ + struct ib_smp *in_mad = NULL; + struct ib_smp *out_mad = NULL; + int err = -ENOMEM; + + in_mad = kzalloc(sizeof(*in_mad), GFP_KERNEL); + out_mad = kmalloc(sizeof(*out_mad), GFP_KERNEL); + if (!in_mad || !out_mad) + goto out; + + init_query_mad(in_mad); + in_mad->attr_id = IB_SMP_ATTR_NODE_DESC; + + err = mlx5_MAD_IFC(dev, 1, 1, 1, NULL, NULL, in_mad, out_mad); + if (err) + goto out; + + memcpy(dev->ib_dev.node_desc, out_mad->data, 64); + + in_mad->attr_id = IB_SMP_ATTR_NODE_INFO; + + err = mlx5_MAD_IFC(dev, 1, 1, 1, NULL, NULL, in_mad, out_mad); + if (err) + goto out; + + dev->mdev.rev_id = be32_to_cpup((__be32 *)(out_mad->data + 32)); + memcpy(&dev->ib_dev.node_guid, out_mad->data + 12, 8); + +out: + kfree(in_mad); + kfree(out_mad); + return err; +} + +static ssize_t show_fw_pages(struct device *device, struct device_attribute *attr, + char *buf) +{ + struct mlx5_ib_dev *dev = + container_of(device, struct mlx5_ib_dev, ib_dev.dev); + + return sprintf(buf, "%d\n", dev->mdev.priv.fw_pages); +} + +static ssize_t show_reg_pages(struct device *device, + struct device_attribute *attr, char *buf) +{ + struct mlx5_ib_dev *dev = + container_of(device, struct mlx5_ib_dev, ib_dev.dev); + + return sprintf(buf, "%d\n", dev->mdev.priv.reg_pages); +} + +static ssize_t show_hca(struct device *device, struct device_attribute *attr, + char *buf) +{ + struct mlx5_ib_dev *dev = + container_of(device, struct mlx5_ib_dev, ib_dev.dev); + return sprintf(buf, "MT%d\n", dev->mdev.pdev->device); +} + +static ssize_t show_fw_ver(struct device *device, struct device_attribute *attr, + char *buf) +{ + struct mlx5_ib_dev *dev = + container_of(device, struct mlx5_ib_dev, ib_dev.dev); + return sprintf(buf, "%d.%d.%d\n", fw_rev_maj(&dev->mdev), + fw_rev_min(&dev->mdev), fw_rev_sub(&dev->mdev)); +} + +static ssize_t show_rev(struct device *device, struct device_attribute *attr, + char *buf) +{ + struct mlx5_ib_dev *dev = + container_of(device, struct mlx5_ib_dev, ib_dev.dev); + return sprintf(buf, "%x\n", dev->mdev.rev_id); +} + +static ssize_t show_board(struct device *device, struct device_attribute *attr, + char *buf) +{ + struct mlx5_ib_dev *dev = + container_of(device, struct mlx5_ib_dev, ib_dev.dev); + return sprintf(buf, "%.*s\n", MLX5_BOARD_ID_LEN, + dev->mdev.board_id); +} + +static DEVICE_ATTR(hw_rev, S_IRUGO, show_rev, NULL); +static DEVICE_ATTR(fw_ver, S_IRUGO, show_fw_ver, NULL); +static DEVICE_ATTR(hca_type, S_IRUGO, show_hca, NULL); +static DEVICE_ATTR(board_id, S_IRUGO, show_board, NULL); +static DEVICE_ATTR(fw_pages, S_IRUGO, show_fw_pages, NULL); +static DEVICE_ATTR(reg_pages, S_IRUGO, show_reg_pages, NULL); + +static struct device_attribute *mlx5_class_attributes[] = { + &dev_attr_hw_rev, + &dev_attr_fw_ver, + &dev_attr_hca_type, + &dev_attr_board_id, + &dev_attr_fw_pages, + &dev_attr_reg_pages, +}; + +static void mlx5_ib_event(struct mlx5_core_dev *dev, enum mlx5_dev_event event, + void *data) +{ + struct mlx5_ib_dev *ibdev = container_of(dev, struct mlx5_ib_dev, mdev); + struct ib_event ibev; + u8 port = 0; + + switch (event) { + case MLX5_DEV_EVENT_SYS_ERROR: + ibdev->ib_active = false; + ibev.event = IB_EVENT_DEVICE_FATAL; + break; + + case MLX5_DEV_EVENT_PORT_UP: + ibev.event = IB_EVENT_PORT_ACTIVE; + port = *(u8 *)data; + break; + + case MLX5_DEV_EVENT_PORT_DOWN: + ibev.event = IB_EVENT_PORT_ERR; + port = *(u8 *)data; + break; + + case MLX5_DEV_EVENT_PORT_INITIALIZED: + /* not used by ULPs */ + return; + + case MLX5_DEV_EVENT_LID_CHANGE: + ibev.event = IB_EVENT_LID_CHANGE; + port = *(u8 *)data; + break; + + case MLX5_DEV_EVENT_PKEY_CHANGE: + ibev.event = IB_EVENT_PKEY_CHANGE; + port = *(u8 *)data; + break; + + case MLX5_DEV_EVENT_GUID_CHANGE: + ibev.event = IB_EVENT_GID_CHANGE; + port = *(u8 *)data; + break; + + case MLX5_DEV_EVENT_CLIENT_REREG: + ibev.event = IB_EVENT_CLIENT_REREGISTER; + port = *(u8 *)data; + break; + } + + ibev.device = &ibdev->ib_dev; + ibev.element.port_num = port; + + if (ibdev->ib_active) + ib_dispatch_event(&ibev); +} + +static void get_ext_port_caps(struct mlx5_ib_dev *dev) +{ + int port; + + for (port = 1; port <= dev->mdev.caps.num_ports; port++) + mlx5_query_ext_port_caps(dev, port); +} + +static int get_port_caps(struct mlx5_ib_dev *dev) +{ + struct ib_device_attr *dprops = NULL; + struct ib_port_attr *pprops = NULL; + int err = 0; + int port; + + pprops = kmalloc(sizeof(*pprops), GFP_KERNEL); + if (!pprops) + goto out; + + dprops = kmalloc(sizeof(*dprops), GFP_KERNEL); + if (!dprops) + goto out; + + err = mlx5_ib_query_device(&dev->ib_dev, dprops); + if (err) { + mlx5_ib_warn(dev, "query_device failed %d\n", err); + goto out; + } + + for (port = 1; port <= dev->mdev.caps.num_ports; port++) { + err = mlx5_ib_query_port(&dev->ib_dev, port, pprops); + if (err) { + mlx5_ib_warn(dev, "query_port %d failed %d\n", port, err); + break; + } + dev->mdev.caps.port[port - 1].pkey_table_len = dprops->max_pkeys; + dev->mdev.caps.port[port - 1].gid_table_len = pprops->gid_tbl_len; + mlx5_ib_dbg(dev, "pkey_table_len %d, gid_table_len %d\n", + dprops->max_pkeys, pprops->gid_tbl_len); + } + +out: + kfree(pprops); + kfree(dprops); + + return err; +} + +static void destroy_umrc_res(struct mlx5_ib_dev *dev) +{ + int err; + + err = mlx5_mr_cache_cleanup(dev); + if (err) + mlx5_ib_warn(dev, "mr cache cleanup failed\n"); + + mlx5_ib_destroy_qp(dev->umrc.qp); + ib_destroy_cq(dev->umrc.cq); + ib_dereg_mr(dev->umrc.mr); + ib_dealloc_pd(dev->umrc.pd); +} + +enum { + MAX_UMR_WR = 128, +}; + +static int create_umr_res(struct mlx5_ib_dev *dev) +{ + struct ib_qp_init_attr *init_attr = NULL; + struct ib_qp_attr *attr = NULL; + struct ib_pd *pd; + struct ib_cq *cq; + struct ib_qp *qp; + struct ib_mr *mr; + int ret; + + attr = kzalloc(sizeof(*attr), GFP_KERNEL); + init_attr = kzalloc(sizeof(*init_attr), GFP_KERNEL); + if (!attr || !init_attr) { + ret = -ENOMEM; + goto error_0; + } + + pd = ib_alloc_pd(&dev->ib_dev); + if (IS_ERR(pd)) { + mlx5_ib_dbg(dev, "Couldn't create PD for sync UMR QP\n"); + ret = PTR_ERR(pd); + goto error_0; + } + + mr = ib_get_dma_mr(pd, IB_ACCESS_LOCAL_WRITE); + if (IS_ERR(mr)) { + mlx5_ib_dbg(dev, "Couldn't create DMA MR for sync UMR QP\n"); + ret = PTR_ERR(mr); + goto error_1; + } + + cq = ib_create_cq(&dev->ib_dev, mlx5_umr_cq_handler, NULL, NULL, 128, + 0); + if (IS_ERR(cq)) { + mlx5_ib_dbg(dev, "Couldn't create CQ for sync UMR QP\n"); + ret = PTR_ERR(cq); + goto error_2; + } + ib_req_notify_cq(cq, IB_CQ_NEXT_COMP); + + init_attr->send_cq = cq; + init_attr->recv_cq = cq; + init_attr->sq_sig_type = IB_SIGNAL_ALL_WR; + init_attr->cap.max_send_wr = MAX_UMR_WR; + init_attr->cap.max_send_sge = 1; + init_attr->qp_type = MLX5_IB_QPT_REG_UMR; + init_attr->port_num = 1; + qp = mlx5_ib_create_qp(pd, init_attr, NULL); + if (IS_ERR(qp)) { + mlx5_ib_dbg(dev, "Couldn't create sync UMR QP\n"); + ret = PTR_ERR(qp); + goto error_3; + } + qp->device = &dev->ib_dev; + qp->real_qp = qp; + qp->uobject = NULL; + qp->qp_type = MLX5_IB_QPT_REG_UMR; + + attr->qp_state = IB_QPS_INIT; + attr->port_num = 1; + ret = mlx5_ib_modify_qp(qp, attr, IB_QP_STATE | IB_QP_PKEY_INDEX | + IB_QP_PORT, NULL); + if (ret) { + mlx5_ib_dbg(dev, "Couldn't modify UMR QP\n"); + goto error_4; + } + + memset(attr, 0, sizeof(*attr)); + attr->qp_state = IB_QPS_RTR; + attr->path_mtu = IB_MTU_256; + + ret = mlx5_ib_modify_qp(qp, attr, IB_QP_STATE, NULL); + if (ret) { + mlx5_ib_dbg(dev, "Couldn't modify umr QP to rtr\n"); + goto error_4; + } + + memset(attr, 0, sizeof(*attr)); + attr->qp_state = IB_QPS_RTS; + ret = mlx5_ib_modify_qp(qp, attr, IB_QP_STATE, NULL); + if (ret) { + mlx5_ib_dbg(dev, "Couldn't modify umr QP to rts\n"); + goto error_4; + } + + dev->umrc.qp = qp; + dev->umrc.cq = cq; + dev->umrc.mr = mr; + dev->umrc.pd = pd; + + sema_init(&dev->umrc.sem, MAX_UMR_WR); + ret = mlx5_mr_cache_init(dev); + if (ret) { + mlx5_ib_warn(dev, "mr cache init failed %d\n", ret); + goto error_4; + } + + kfree(attr); + kfree(init_attr); + + return 0; + +error_4: + mlx5_ib_destroy_qp(qp); + +error_3: + ib_destroy_cq(cq); + +error_2: + ib_dereg_mr(mr); + +error_1: + ib_dealloc_pd(pd); + +error_0: + kfree(attr); + kfree(init_attr); + return ret; +} + +static int create_dev_resources(struct mlx5_ib_resources *devr) +{ + struct ib_srq_init_attr attr; + struct mlx5_ib_dev *dev; + int ret = 0; + + dev = container_of(devr, struct mlx5_ib_dev, devr); + + devr->p0 = mlx5_ib_alloc_pd(&dev->ib_dev, NULL, NULL); + if (IS_ERR(devr->p0)) { + ret = PTR_ERR(devr->p0); + goto error0; + } + devr->p0->device = &dev->ib_dev; + devr->p0->uobject = NULL; + atomic_set(&devr->p0->usecnt, 0); + + devr->c0 = mlx5_ib_create_cq(&dev->ib_dev, 1, 0, NULL, NULL); + if (IS_ERR(devr->c0)) { + ret = PTR_ERR(devr->c0); + goto error1; + } + devr->c0->device = &dev->ib_dev; + devr->c0->uobject = NULL; + devr->c0->comp_handler = NULL; + devr->c0->event_handler = NULL; + devr->c0->cq_context = NULL; + atomic_set(&devr->c0->usecnt, 0); + + devr->x0 = mlx5_ib_alloc_xrcd(&dev->ib_dev, NULL, NULL); + if (IS_ERR(devr->x0)) { + ret = PTR_ERR(devr->x0); + goto error2; + } + devr->x0->device = &dev->ib_dev; + devr->x0->inode = NULL; + atomic_set(&devr->x0->usecnt, 0); + mutex_init(&devr->x0->tgt_qp_mutex); + INIT_LIST_HEAD(&devr->x0->tgt_qp_list); + + devr->x1 = mlx5_ib_alloc_xrcd(&dev->ib_dev, NULL, NULL); + if (IS_ERR(devr->x1)) { + ret = PTR_ERR(devr->x1); + goto error3; + } + devr->x1->device = &dev->ib_dev; + devr->x1->inode = NULL; + atomic_set(&devr->x1->usecnt, 0); + mutex_init(&devr->x1->tgt_qp_mutex); + INIT_LIST_HEAD(&devr->x1->tgt_qp_list); + + memset(&attr, 0, sizeof(attr)); + attr.attr.max_sge = 1; + attr.attr.max_wr = 1; + attr.srq_type = IB_SRQT_XRC; + attr.ext.xrc.cq = devr->c0; + attr.ext.xrc.xrcd = devr->x0; + + devr->s0 = mlx5_ib_create_srq(devr->p0, &attr, NULL); + if (IS_ERR(devr->s0)) { + ret = PTR_ERR(devr->s0); + goto error4; + } + devr->s0->device = &dev->ib_dev; + devr->s0->pd = devr->p0; + devr->s0->uobject = NULL; + devr->s0->event_handler = NULL; + devr->s0->srq_context = NULL; + devr->s0->srq_type = IB_SRQT_XRC; + devr->s0->ext.xrc.xrcd = devr->x0; + devr->s0->ext.xrc.cq = devr->c0; + atomic_inc(&devr->s0->ext.xrc.xrcd->usecnt); + atomic_inc(&devr->s0->ext.xrc.cq->usecnt); + atomic_inc(&devr->p0->usecnt); + atomic_set(&devr->s0->usecnt, 0); + + return 0; + +error4: + mlx5_ib_dealloc_xrcd(devr->x1); +error3: + mlx5_ib_dealloc_xrcd(devr->x0); +error2: + mlx5_ib_destroy_cq(devr->c0); +error1: + mlx5_ib_dealloc_pd(devr->p0); +error0: + return ret; +} + +static void destroy_dev_resources(struct mlx5_ib_resources *devr) +{ + mlx5_ib_destroy_srq(devr->s0); + mlx5_ib_dealloc_xrcd(devr->x0); + mlx5_ib_dealloc_xrcd(devr->x1); + mlx5_ib_destroy_cq(devr->c0); + mlx5_ib_dealloc_pd(devr->p0); +} + +static int init_one(struct pci_dev *pdev, + const struct pci_device_id *id) +{ + struct mlx5_core_dev *mdev; + struct mlx5_ib_dev *dev; + int err; + int i; + + printk_once(KERN_INFO "%s", mlx5_version); + + dev = (struct mlx5_ib_dev *)ib_alloc_device(sizeof(*dev)); + if (!dev) + return -ENOMEM; + + mdev = &dev->mdev; + mdev->event = mlx5_ib_event; + if (prof_sel >= ARRAY_SIZE(profile)) { + pr_warn("selected pofile out of range, selceting default\n"); + prof_sel = 0; + } + mdev->profile = &profile[prof_sel]; + err = mlx5_dev_init(mdev, pdev); + if (err) + goto err_free; + + err = get_port_caps(dev); + if (err) + goto err_cleanup; + + get_ext_port_caps(dev); + + err = alloc_comp_eqs(dev); + if (err) + goto err_cleanup; + + MLX5_INIT_DOORBELL_LOCK(&dev->uar_lock); + + strlcpy(dev->ib_dev.name, "mlx5_%d", IB_DEVICE_NAME_MAX); + dev->ib_dev.owner = THIS_MODULE; + dev->ib_dev.node_type = RDMA_NODE_IB_CA; + dev->ib_dev.local_dma_lkey = mdev->caps.reserved_lkey; + dev->num_ports = mdev->caps.num_ports; + dev->ib_dev.phys_port_cnt = dev->num_ports; + dev->ib_dev.num_comp_vectors = dev->num_comp_vectors; + dev->ib_dev.dma_device = &mdev->pdev->dev; + + dev->ib_dev.uverbs_abi_ver = MLX5_IB_UVERBS_ABI_VERSION; + dev->ib_dev.uverbs_cmd_mask = + (1ull << IB_USER_VERBS_CMD_GET_CONTEXT) | + (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE) | + (1ull << IB_USER_VERBS_CMD_QUERY_PORT) | + (1ull << IB_USER_VERBS_CMD_ALLOC_PD) | + (1ull << IB_USER_VERBS_CMD_DEALLOC_PD) | + (1ull << IB_USER_VERBS_CMD_REG_MR) | + (1ull << IB_USER_VERBS_CMD_DEREG_MR) | + (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) | + (1ull << IB_USER_VERBS_CMD_CREATE_CQ) | + (1ull << IB_USER_VERBS_CMD_RESIZE_CQ) | + (1ull << IB_USER_VERBS_CMD_DESTROY_CQ) | + (1ull << IB_USER_VERBS_CMD_CREATE_QP) | + (1ull << IB_USER_VERBS_CMD_MODIFY_QP) | + (1ull << IB_USER_VERBS_CMD_QUERY_QP) | + (1ull << IB_USER_VERBS_CMD_DESTROY_QP) | + (1ull << IB_USER_VERBS_CMD_ATTACH_MCAST) | + (1ull << IB_USER_VERBS_CMD_DETACH_MCAST) | + (1ull << IB_USER_VERBS_CMD_CREATE_SRQ) | + (1ull << IB_USER_VERBS_CMD_MODIFY_SRQ) | + (1ull << IB_USER_VERBS_CMD_QUERY_SRQ) | + (1ull << IB_USER_VERBS_CMD_DESTROY_SRQ) | + (1ull << IB_USER_VERBS_CMD_CREATE_XSRQ) | + (1ull << IB_USER_VERBS_CMD_OPEN_QP); + + dev->ib_dev.query_device = mlx5_ib_query_device; + dev->ib_dev.query_port = mlx5_ib_query_port; + dev->ib_dev.query_gid = mlx5_ib_query_gid; + dev->ib_dev.query_pkey = mlx5_ib_query_pkey; + dev->ib_dev.modify_device = mlx5_ib_modify_device; + dev->ib_dev.modify_port = mlx5_ib_modify_port; + dev->ib_dev.alloc_ucontext = mlx5_ib_alloc_ucontext; + dev->ib_dev.dealloc_ucontext = mlx5_ib_dealloc_ucontext; + dev->ib_dev.mmap = mlx5_ib_mmap; + dev->ib_dev.alloc_pd = mlx5_ib_alloc_pd; + dev->ib_dev.dealloc_pd = mlx5_ib_dealloc_pd; + dev->ib_dev.create_ah = mlx5_ib_create_ah; + dev->ib_dev.query_ah = mlx5_ib_query_ah; + dev->ib_dev.destroy_ah = mlx5_ib_destroy_ah; + dev->ib_dev.create_srq = mlx5_ib_create_srq; + dev->ib_dev.modify_srq = mlx5_ib_modify_srq; + dev->ib_dev.query_srq = mlx5_ib_query_srq; + dev->ib_dev.destroy_srq = mlx5_ib_destroy_srq; + dev->ib_dev.post_srq_recv = mlx5_ib_post_srq_recv; + dev->ib_dev.create_qp = mlx5_ib_create_qp; + dev->ib_dev.modify_qp = mlx5_ib_modify_qp; + dev->ib_dev.query_qp = mlx5_ib_query_qp; + dev->ib_dev.destroy_qp = mlx5_ib_destroy_qp; + dev->ib_dev.post_send = mlx5_ib_post_send; + dev->ib_dev.post_recv = mlx5_ib_post_recv; + dev->ib_dev.create_cq = mlx5_ib_create_cq; + dev->ib_dev.modify_cq = mlx5_ib_modify_cq; + dev->ib_dev.resize_cq = mlx5_ib_resize_cq; + dev->ib_dev.destroy_cq = mlx5_ib_destroy_cq; + dev->ib_dev.poll_cq = mlx5_ib_poll_cq; + dev->ib_dev.req_notify_cq = mlx5_ib_arm_cq; + dev->ib_dev.get_dma_mr = mlx5_ib_get_dma_mr; + dev->ib_dev.reg_user_mr = mlx5_ib_reg_user_mr; + dev->ib_dev.dereg_mr = mlx5_ib_dereg_mr; + dev->ib_dev.attach_mcast = mlx5_ib_mcg_attach; + dev->ib_dev.detach_mcast = mlx5_ib_mcg_detach; + dev->ib_dev.process_mad = mlx5_ib_process_mad; + dev->ib_dev.alloc_fast_reg_mr = mlx5_ib_alloc_fast_reg_mr; + dev->ib_dev.alloc_fast_reg_page_list = mlx5_ib_alloc_fast_reg_page_list; + dev->ib_dev.free_fast_reg_page_list = mlx5_ib_free_fast_reg_page_list; + + if (mdev->caps.flags & MLX5_DEV_CAP_FLAG_XRC) { + dev->ib_dev.alloc_xrcd = mlx5_ib_alloc_xrcd; + dev->ib_dev.dealloc_xrcd = mlx5_ib_dealloc_xrcd; + dev->ib_dev.uverbs_cmd_mask |= + (1ull << IB_USER_VERBS_CMD_OPEN_XRCD) | + (1ull << IB_USER_VERBS_CMD_CLOSE_XRCD); + } + + err = init_node_data(dev); + if (err) + goto err_eqs; + + mutex_init(&dev->cap_mask_mutex); + spin_lock_init(&dev->mr_lock); + + err = create_dev_resources(&dev->devr); + if (err) + goto err_eqs; + + if (ib_register_device(&dev->ib_dev, NULL)) + goto err_rsrc; + + err = create_umr_res(dev); + if (err) + goto err_dev; + + for (i = 0; i < ARRAY_SIZE(mlx5_class_attributes); i++) { + if (device_create_file(&dev->ib_dev.dev, + mlx5_class_attributes[i])) + goto err_umrc; + } + + dev->ib_active = true; + + return 0; + +err_umrc: + destroy_umrc_res(dev); + +err_dev: + ib_unregister_device(&dev->ib_dev); + +err_rsrc: + destroy_dev_resources(&dev->devr); + +err_eqs: + free_comp_eqs(dev); + +err_cleanup: + mlx5_dev_cleanup(mdev); + +err_free: + ib_dealloc_device((struct ib_device *)dev); + + return err; +} + +static void remove_one(struct pci_dev *pdev) +{ + struct mlx5_ib_dev *dev = mlx5_pci2ibdev(pdev); + + destroy_umrc_res(dev); + ib_unregister_device(&dev->ib_dev); + destroy_dev_resources(&dev->devr); + free_comp_eqs(dev); + mlx5_dev_cleanup(&dev->mdev); + ib_dealloc_device(&dev->ib_dev); +} + +static DEFINE_PCI_DEVICE_TABLE(mlx5_ib_pci_table) = { + { PCI_VDEVICE(MELLANOX, 4113) }, /* MT4113 Connect-IB */ + { 0, } +}; + +MODULE_DEVICE_TABLE(pci, mlx5_ib_pci_table); + +static struct pci_driver mlx5_ib_driver = { + .name = DRIVER_NAME, + .id_table = mlx5_ib_pci_table, + .probe = init_one, + .remove = remove_one +}; + +static int __init mlx5_ib_init(void) +{ + return pci_register_driver(&mlx5_ib_driver); +} + +static void __exit mlx5_ib_cleanup(void) +{ + pci_unregister_driver(&mlx5_ib_driver); +} + +module_init(mlx5_ib_init); +module_exit(mlx5_ib_cleanup); diff --git a/drivers/infiniband/hw/mlx5/mem.c b/drivers/infiniband/hw/mlx5/mem.c new file mode 100644 index 000000000000..3a5322870b96 --- /dev/null +++ b/drivers/infiniband/hw/mlx5/mem.c @@ -0,0 +1,162 @@ +/* + * Copyright (c) 2013, Mellanox Technologies inc. All rights reserved. + * + * This software is available to you under a choice of one of two + * licenses. You may choose to be licensed under the terms of the GNU + * General Public License (GPL) Version 2, available from the file + * COPYING in the main directory of this source tree, or the + * OpenIB.org BSD license below: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * - Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * - Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +#include <linux/module.h> +#include <rdma/ib_umem.h> +#include "mlx5_ib.h" + +/* @umem: umem object to scan + * @addr: ib virtual address requested by the user + * @count: number of PAGE_SIZE pages covered by umem + * @shift: page shift for the compound pages found in the region + * @ncont: number of compund pages + * @order: log2 of the number of compound pages + */ +void mlx5_ib_cont_pages(struct ib_umem *umem, u64 addr, int *count, int *shift, + int *ncont, int *order) +{ + struct ib_umem_chunk *chunk; + unsigned long tmp; + unsigned long m; + int i, j, k; + u64 base = 0; + int p = 0; + int skip; + int mask; + u64 len; + u64 pfn; + + addr = addr >> PAGE_SHIFT; + tmp = (unsigned long)addr; + m = find_first_bit(&tmp, sizeof(tmp)); + skip = 1 << m; + mask = skip - 1; + i = 0; + list_for_each_entry(chunk, &umem->chunk_list, list) + for (j = 0; j < chunk->nmap; j++) { + len = sg_dma_len(&chunk->page_list[j]) >> PAGE_SHIFT; + pfn = sg_dma_address(&chunk->page_list[j]) >> PAGE_SHIFT; + for (k = 0; k < len; k++) { + if (!(i & mask)) { + tmp = (unsigned long)pfn; + m = min(m, find_first_bit(&tmp, sizeof(tmp))); + skip = 1 << m; + mask = skip - 1; + base = pfn; + p = 0; + } else { + if (base + p != pfn) { + tmp = (unsigned long)p; + m = find_first_bit(&tmp, sizeof(tmp)); + skip = 1 << m; + mask = skip - 1; + base = pfn; + p = 0; + } + } + p++; + i++; + } + } + + if (i) { + m = min_t(unsigned long, ilog2(roundup_pow_of_two(i)), m); + + if (order) + *order = ilog2(roundup_pow_of_two(i) >> m); + + *ncont = DIV_ROUND_UP(i, (1 << m)); + } else { + m = 0; + + if (order) + *order = 0; + + *ncont = 0; + } + *shift = PAGE_SHIFT + m; + *count = i; +} + +void mlx5_ib_populate_pas(struct mlx5_ib_dev *dev, struct ib_umem *umem, + int page_shift, __be64 *pas, int umr) +{ + int shift = page_shift - PAGE_SHIFT; + int mask = (1 << shift) - 1; + struct ib_umem_chunk *chunk; + int i, j, k; + u64 cur = 0; + u64 base; + int len; + + i = 0; + list_for_each_entry(chunk, &umem->chunk_list, list) + for (j = 0; j < chunk->nmap; j++) { + len = sg_dma_len(&chunk->page_list[j]) >> PAGE_SHIFT; + base = sg_dma_address(&chunk->page_list[j]); + for (k = 0; k < len; k++) { + if (!(i & mask)) { + cur = base + (k << PAGE_SHIFT); + if (umr) + cur |= 3; + + pas[i >> shift] = cpu_to_be64(cur); + mlx5_ib_dbg(dev, "pas[%d] 0x%llx\n", + i >> shift, be64_to_cpu(pas[i >> shift])); + } else + mlx5_ib_dbg(dev, "=====> 0x%llx\n", + base + (k << PAGE_SHIFT)); + i++; + } + } +} + +int mlx5_ib_get_buf_offset(u64 addr, int page_shift, u32 *offset) +{ + u64 page_size; + u64 page_mask; + u64 off_size; + u64 off_mask; + u64 buf_off; + + page_size = 1 << page_shift; + page_mask = page_size - 1; + buf_off = addr & page_mask; + off_size = page_size >> 6; + off_mask = off_size - 1; + + if (buf_off & off_mask) + return -EINVAL; + + *offset = buf_off >> ilog2(off_size); + return 0; +} diff --git a/drivers/infiniband/hw/mlx5/mlx5_ib.h b/drivers/infiniband/hw/mlx5/mlx5_ib.h new file mode 100644 index 000000000000..836be9157242 --- /dev/null +++ b/drivers/infiniband/hw/mlx5/mlx5_ib.h @@ -0,0 +1,545 @@ +/* + * Copyright (c) 2013, Mellanox Technologies inc. All rights reserved. + * + * This software is available to you under a choice of one of two + * licenses. You may choose to be licensed under the terms of the GNU + * General Public License (GPL) Version 2, available from the file + * COPYING in the main directory of this source tree, or the + * OpenIB.org BSD license below: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * - Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * - Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +#ifndef MLX5_IB_H +#define MLX5_IB_H + +#include <linux/kernel.h> +#include <linux/sched.h> +#include <rdma/ib_verbs.h> +#include <rdma/ib_smi.h> +#include <linux/mlx5/driver.h> +#include <linux/mlx5/cq.h> +#include <linux/mlx5/qp.h> +#include <linux/mlx5/srq.h> +#include <linux/types.h> + +#define mlx5_ib_dbg(dev, format, arg...) \ +pr_debug("%s:%s:%d:(pid %d): " format, (dev)->ib_dev.name, __func__, \ + __LINE__, current->pid, ##arg) + +#define mlx5_ib_err(dev, format, arg...) \ +pr_err("%s:%s:%d:(pid %d): " format, (dev)->ib_dev.name, __func__, \ + __LINE__, current->pid, ##arg) + +#define mlx5_ib_warn(dev, format, arg...) \ +pr_warn("%s:%s:%d:(pid %d): " format, (dev)->ib_dev.name, __func__, \ + __LINE__, current->pid, ##arg) + +enum { + MLX5_IB_MMAP_CMD_SHIFT = 8, + MLX5_IB_MMAP_CMD_MASK = 0xff, +}; + +enum mlx5_ib_mmap_cmd { + MLX5_IB_MMAP_REGULAR_PAGE = 0, + MLX5_IB_MMAP_GET_CONTIGUOUS_PAGES = 1, /* always last */ +}; + +enum { + MLX5_RES_SCAT_DATA32_CQE = 0x1, + MLX5_RES_SCAT_DATA64_CQE = 0x2, + MLX5_REQ_SCAT_DATA32_CQE = 0x11, + MLX5_REQ_SCAT_DATA64_CQE = 0x22, +}; + +enum mlx5_ib_latency_class { + MLX5_IB_LATENCY_CLASS_LOW, + MLX5_IB_LATENCY_CLASS_MEDIUM, + MLX5_IB_LATENCY_CLASS_HIGH, + MLX5_IB_LATENCY_CLASS_FAST_PATH +}; + +enum mlx5_ib_mad_ifc_flags { + MLX5_MAD_IFC_IGNORE_MKEY = 1, + MLX5_MAD_IFC_IGNORE_BKEY = 2, + MLX5_MAD_IFC_NET_VIEW = 4, +}; + +struct mlx5_ib_ucontext { + struct ib_ucontext ibucontext; + struct list_head db_page_list; + + /* protect doorbell record alloc/free + */ + struct mutex db_page_mutex; + struct mlx5_uuar_info uuari; +}; + +static inline struct mlx5_ib_ucontext *to_mucontext(struct ib_ucontext *ibucontext) +{ + return container_of(ibucontext, struct mlx5_ib_ucontext, ibucontext); +} + +struct mlx5_ib_pd { + struct ib_pd ibpd; + u32 pdn; + u32 pa_lkey; +}; + +/* Use macros here so that don't have to duplicate + * enum ib_send_flags and enum ib_qp_type for low-level driver + */ + +#define MLX5_IB_SEND_UMR_UNREG IB_SEND_RESERVED_START +#define MLX5_IB_QPT_REG_UMR IB_QPT_RESERVED1 +#define MLX5_IB_WR_UMR IB_WR_RESERVED1 + +struct wr_list { + u16 opcode; + u16 next; +}; + +struct mlx5_ib_wq { + u64 *wrid; + u32 *wr_data; + struct wr_list *w_list; + unsigned *wqe_head; + u16 unsig_count; + + /* serialize post to the work queue + */ + spinlock_t lock; + int wqe_cnt; + int max_post; + int max_gs; + int offset; + int wqe_shift; + unsigned head; + unsigned tail; + u16 cur_post; + u16 last_poll; + void *qend; +}; + +enum { + MLX5_QP_USER, + MLX5_QP_KERNEL, + MLX5_QP_EMPTY +}; + +struct mlx5_ib_qp { + struct ib_qp ibqp; + struct mlx5_core_qp mqp; + struct mlx5_buf buf; + + struct mlx5_db db; + struct mlx5_ib_wq rq; + + u32 doorbell_qpn; + u8 sq_signal_bits; + u8 fm_cache; + int sq_max_wqes_per_wr; + int sq_spare_wqes; + struct mlx5_ib_wq sq; + + struct ib_umem *umem; + int buf_size; + + /* serialize qp state modifications + */ + struct mutex mutex; + u16 xrcdn; + u32 flags; + u8 port; + u8 alt_port; + u8 atomic_rd_en; + u8 resp_depth; + u8 state; + int mlx_type; + int wq_sig; + int scat_cqe; + int max_inline_data; + struct mlx5_bf *bf; + int has_rq; + + /* only for user space QPs. For kernel + * we have it from the bf object + */ + int uuarn; + + int create_type; + u32 pa_lkey; +}; + +struct mlx5_ib_cq_buf { + struct mlx5_buf buf; + struct ib_umem *umem; + int cqe_size; +}; + +enum mlx5_ib_qp_flags { + MLX5_IB_QP_BLOCK_MULTICAST_LOOPBACK = 1 << 0, + MLX5_IB_QP_SIGNATURE_HANDLING = 1 << 1, +}; + +struct mlx5_shared_mr_info { + int mr_id; + struct ib_umem *umem; +}; + +struct mlx5_ib_cq { + struct ib_cq ibcq; + struct mlx5_core_cq mcq; + struct mlx5_ib_cq_buf buf; + struct mlx5_db db; + + /* serialize access to the CQ + */ + spinlock_t lock; + + /* protect resize cq + */ + struct mutex resize_mutex; + struct mlx5_ib_cq_resize *resize_buf; + struct ib_umem *resize_umem; + int cqe_size; +}; + +struct mlx5_ib_srq { + struct ib_srq ibsrq; + struct mlx5_core_srq msrq; + struct mlx5_buf buf; + struct mlx5_db db; + u64 *wrid; + /* protect SRQ hanlding + */ + spinlock_t lock; + int head; + int tail; + u16 wqe_ctr; + struct ib_umem *umem; + /* serialize arming a SRQ + */ + struct mutex mutex; + int wq_sig; +}; + +struct mlx5_ib_xrcd { + struct ib_xrcd ibxrcd; + u32 xrcdn; +}; + +struct mlx5_ib_mr { + struct ib_mr ibmr; + struct mlx5_core_mr mmr; + struct ib_umem *umem; + struct mlx5_shared_mr_info *smr_info; + struct list_head list; + int order; + int umred; + __be64 *pas; + dma_addr_t dma; + int npages; + struct completion done; + enum ib_wc_status status; +}; + +struct mlx5_ib_fast_reg_page_list { + struct ib_fast_reg_page_list ibfrpl; + __be64 *mapped_page_list; + dma_addr_t map; +}; + +struct umr_common { + struct ib_pd *pd; + struct ib_cq *cq; + struct ib_qp *qp; + struct ib_mr *mr; + /* control access to UMR QP + */ + struct semaphore sem; +}; + +enum { + MLX5_FMR_INVALID, + MLX5_FMR_VALID, + MLX5_FMR_BUSY, +}; + +struct mlx5_ib_fmr { + struct ib_fmr ibfmr; + struct mlx5_core_mr mr; + int access_flags; + int state; + /* protect fmr state + */ + spinlock_t lock; + u64 wrid; + struct ib_send_wr wr[2]; + u8 page_shift; + struct ib_fast_reg_page_list page_list; +}; + +struct mlx5_cache_ent { + struct list_head head; + /* sync access to the cahce entry + */ + spinlock_t lock; + + + struct dentry *dir; + char name[4]; + u32 order; + u32 size; + u32 cur; + u32 miss; + u32 limit; + + struct dentry *fsize; + struct dentry *fcur; + struct dentry *fmiss; + struct dentry *flimit; + + struct mlx5_ib_dev *dev; + struct work_struct work; + struct delayed_work dwork; +}; + +struct mlx5_mr_cache { + struct workqueue_struct *wq; + struct mlx5_cache_ent ent[MAX_MR_CACHE_ENTRIES]; + int stopped; + struct dentry *root; + unsigned long last_add; +}; + +struct mlx5_ib_resources { + struct ib_cq *c0; + struct ib_xrcd *x0; + struct ib_xrcd *x1; + struct ib_pd *p0; + struct ib_srq *s0; +}; + +struct mlx5_ib_dev { + struct ib_device ib_dev; + struct mlx5_core_dev mdev; + MLX5_DECLARE_DOORBELL_LOCK(uar_lock); + struct list_head eqs_list; + int num_ports; + int num_comp_vectors; + /* serialize update of capability mask + */ + struct mutex cap_mask_mutex; + bool ib_active; + struct umr_common umrc; + /* sync used page count stats + */ + spinlock_t mr_lock; + struct mlx5_ib_resources devr; + struct mlx5_mr_cache cache; +}; + +static inline struct mlx5_ib_cq *to_mibcq(struct mlx5_core_cq *mcq) +{ + return container_of(mcq, struct mlx5_ib_cq, mcq); +} + +static inline struct mlx5_ib_xrcd *to_mxrcd(struct ib_xrcd *ibxrcd) +{ + return container_of(ibxrcd, struct mlx5_ib_xrcd, ibxrcd); +} + +static inline struct mlx5_ib_dev *to_mdev(struct ib_device *ibdev) +{ + return container_of(ibdev, struct mlx5_ib_dev, ib_dev); +} + +static inline struct mlx5_ib_fmr *to_mfmr(struct ib_fmr *ibfmr) +{ + return container_of(ibfmr, struct mlx5_ib_fmr, ibfmr); +} + +static inline struct mlx5_ib_cq *to_mcq(struct ib_cq *ibcq) +{ + return container_of(ibcq, struct mlx5_ib_cq, ibcq); +} + +static inline struct mlx5_ib_qp *to_mibqp(struct mlx5_core_qp *mqp) +{ + return container_of(mqp, struct mlx5_ib_qp, mqp); +} + +static inline struct mlx5_ib_pd *to_mpd(struct ib_pd *ibpd) +{ + return container_of(ibpd, struct mlx5_ib_pd, ibpd); +} + +static inline struct mlx5_ib_srq *to_msrq(struct ib_srq *ibsrq) +{ + return container_of(ibsrq, struct mlx5_ib_srq, ibsrq); +} + +static inline struct mlx5_ib_qp *to_mqp(struct ib_qp *ibqp) +{ + return container_of(ibqp, struct mlx5_ib_qp, ibqp); +} + +static inline struct mlx5_ib_srq *to_mibsrq(struct mlx5_core_srq *msrq) +{ + return container_of(msrq, struct mlx5_ib_srq, msrq); +} + +static inline struct mlx5_ib_mr *to_mmr(struct ib_mr *ibmr) +{ + return container_of(ibmr, struct mlx5_ib_mr, ibmr); +} + +static inline struct mlx5_ib_fast_reg_page_list *to_mfrpl(struct ib_fast_reg_page_list *ibfrpl) +{ + return container_of(ibfrpl, struct mlx5_ib_fast_reg_page_list, ibfrpl); +} + +struct mlx5_ib_ah { + struct ib_ah ibah; + struct mlx5_av av; +}; + +static inline struct mlx5_ib_ah *to_mah(struct ib_ah *ibah) +{ + return container_of(ibah, struct mlx5_ib_ah, ibah); +} + +static inline struct mlx5_ib_dev *mlx5_core2ibdev(struct mlx5_core_dev *dev) +{ + return container_of(dev, struct mlx5_ib_dev, mdev); +} + +static inline struct mlx5_ib_dev *mlx5_pci2ibdev(struct pci_dev *pdev) +{ + return mlx5_core2ibdev(pci2mlx5_core_dev(pdev)); +} + +int mlx5_ib_db_map_user(struct mlx5_ib_ucontext *context, unsigned long virt, + struct mlx5_db *db); +void mlx5_ib_db_unmap_user(struct mlx5_ib_ucontext *context, struct mlx5_db *db); +void __mlx5_ib_cq_clean(struct mlx5_ib_cq *cq, u32 qpn, struct mlx5_ib_srq *srq); +void mlx5_ib_cq_clean(struct mlx5_ib_cq *cq, u32 qpn, struct mlx5_ib_srq *srq); +void mlx5_ib_free_srq_wqe(struct mlx5_ib_srq *srq, int wqe_index); +int mlx5_MAD_IFC(struct mlx5_ib_dev *dev, int ignore_mkey, int ignore_bkey, + int port, struct ib_wc *in_wc, struct ib_grh *in_grh, + void *in_mad, void *response_mad); +struct ib_ah *create_ib_ah(struct ib_ah_attr *ah_attr, + struct mlx5_ib_ah *ah); +struct ib_ah *mlx5_ib_create_ah(struct ib_pd *pd, struct ib_ah_attr *ah_attr); +int mlx5_ib_query_ah(struct ib_ah *ibah, struct ib_ah_attr *ah_attr); +int mlx5_ib_destroy_ah(struct ib_ah *ah); +struct ib_srq *mlx5_ib_create_srq(struct ib_pd *pd, + struct ib_srq_init_attr *init_attr, + struct ib_udata *udata); +int mlx5_ib_modify_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr, + enum ib_srq_attr_mask attr_mask, struct ib_udata *udata); +int mlx5_ib_query_srq(struct ib_srq *ibsrq, struct ib_srq_attr *srq_attr); +int mlx5_ib_destroy_srq(struct ib_srq *srq); +int mlx5_ib_post_srq_recv(struct ib_srq *ibsrq, struct ib_recv_wr *wr, + struct ib_recv_wr **bad_wr); +struct ib_qp *mlx5_ib_create_qp(struct ib_pd *pd, + struct ib_qp_init_attr *init_attr, + struct ib_udata *udata); +int mlx5_ib_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, + int attr_mask, struct ib_udata *udata); +int mlx5_ib_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *qp_attr, int qp_attr_mask, + struct ib_qp_init_attr *qp_init_attr); +int mlx5_ib_destroy_qp(struct ib_qp *qp); +int mlx5_ib_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr, + struct ib_send_wr **bad_wr); +int mlx5_ib_post_recv(struct ib_qp *ibqp, struct ib_recv_wr *wr, + struct ib_recv_wr **bad_wr); +void *mlx5_get_send_wqe(struct mlx5_ib_qp *qp, int n); +struct ib_cq *mlx5_ib_create_cq(struct ib_device *ibdev, int entries, + int vector, struct ib_ucontext *context, + struct ib_udata *udata); +int mlx5_ib_destroy_cq(struct ib_cq *cq); +int mlx5_ib_poll_cq(struct ib_cq *ibcq, int num_entries, struct ib_wc *wc); +int mlx5_ib_arm_cq(struct ib_cq *ibcq, enum ib_cq_notify_flags flags); +int mlx5_ib_modify_cq(struct ib_cq *cq, u16 cq_count, u16 cq_period); +int mlx5_ib_resize_cq(struct ib_cq *ibcq, int entries, struct ib_udata *udata); +struct ib_mr *mlx5_ib_get_dma_mr(struct ib_pd *pd, int acc); +struct ib_mr *mlx5_ib_reg_user_mr(struct ib_pd *pd, u64 start, u64 length, + u64 virt_addr, int access_flags, + struct ib_udata *udata); +int mlx5_ib_dereg_mr(struct ib_mr *ibmr); +struct ib_mr *mlx5_ib_alloc_fast_reg_mr(struct ib_pd *pd, + int max_page_list_len); +struct ib_fast_reg_page_list *mlx5_ib_alloc_fast_reg_page_list(struct ib_device *ibdev, + int page_list_len); +void mlx5_ib_free_fast_reg_page_list(struct ib_fast_reg_page_list *page_list); +struct ib_fmr *mlx5_ib_fmr_alloc(struct ib_pd *pd, int acc, + struct ib_fmr_attr *fmr_attr); +int mlx5_ib_map_phys_fmr(struct ib_fmr *ibfmr, u64 *page_list, + int npages, u64 iova); +int mlx5_ib_unmap_fmr(struct list_head *fmr_list); +int mlx5_ib_fmr_dealloc(struct ib_fmr *ibfmr); +int mlx5_ib_process_mad(struct ib_device *ibdev, int mad_flags, u8 port_num, + struct ib_wc *in_wc, struct ib_grh *in_grh, + struct ib_mad *in_mad, struct ib_mad *out_mad); +struct ib_xrcd *mlx5_ib_alloc_xrcd(struct ib_device *ibdev, + struct ib_ucontext *context, + struct ib_udata *udata); +int mlx5_ib_dealloc_xrcd(struct ib_xrcd *xrcd); +int mlx5_vector2eqn(struct mlx5_ib_dev *dev, int vector, int *eqn, int *irqn); +int mlx5_ib_get_buf_offset(u64 addr, int page_shift, u32 *offset); +int mlx5_query_ext_port_caps(struct mlx5_ib_dev *dev, u8 port); +int mlx5_ib_query_port(struct ib_device *ibdev, u8 port, + struct ib_port_attr *props); +int mlx5_ib_init_fmr(struct mlx5_ib_dev *dev); +void mlx5_ib_cleanup_fmr(struct mlx5_ib_dev *dev); +void mlx5_ib_cont_pages(struct ib_umem *umem, u64 addr, int *count, int *shift, + int *ncont, int *order); +void mlx5_ib_populate_pas(struct mlx5_ib_dev *dev, struct ib_umem *umem, + int page_shift, __be64 *pas, int umr); +void mlx5_ib_copy_pas(u64 *old, u64 *new, int step, int num); +int mlx5_ib_get_cqe_size(struct mlx5_ib_dev *dev, struct ib_cq *ibcq); +int mlx5_mr_cache_init(struct mlx5_ib_dev *dev); +int mlx5_mr_cache_cleanup(struct mlx5_ib_dev *dev); +int mlx5_mr_ib_cont_pages(struct ib_umem *umem, u64 addr, int *count, int *shift); +void mlx5_umr_cq_handler(struct ib_cq *cq, void *cq_context); + +static inline void init_query_mad(struct ib_smp *mad) +{ + mad->base_version = 1; + mad->mgmt_class = IB_MGMT_CLASS_SUBN_LID_ROUTED; + mad->class_version = 1; + mad->method = IB_MGMT_METHOD_GET; +} + +static inline u8 convert_access(int acc) +{ + return (acc & IB_ACCESS_REMOTE_ATOMIC ? MLX5_PERM_ATOMIC : 0) | + (acc & IB_ACCESS_REMOTE_WRITE ? MLX5_PERM_REMOTE_WRITE : 0) | + (acc & IB_ACCESS_REMOTE_READ ? MLX5_PERM_REMOTE_READ : 0) | + (acc & IB_ACCESS_LOCAL_WRITE ? MLX5_PERM_LOCAL_WRITE : 0) | + MLX5_PERM_LOCAL_READ; +} + +#endif /* MLX5_IB_H */ diff --git a/drivers/infiniband/hw/mlx5/mr.c b/drivers/infiniband/hw/mlx5/mr.c new file mode 100644 index 000000000000..e2daa8f02476 --- /dev/null +++ b/drivers/infiniband/hw/mlx5/mr.c @@ -0,0 +1,1007 @@ +/* + * Copyright (c) 2013, Mellanox Technologies inc. All rights reserved. + * + * This software is available to you under a choice of one of two + * licenses. You may choose to be licensed under the terms of the GNU + * General Public License (GPL) Version 2, available from the file + * COPYING in the main directory of this source tree, or the + * OpenIB.org BSD license below: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * - Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * - Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + + +#include <linux/kref.h> +#include <linux/random.h> +#include <linux/debugfs.h> +#include <linux/export.h> +#include <rdma/ib_umem.h> +#include "mlx5_ib.h" + +enum { + DEF_CACHE_SIZE = 10, +}; + +static __be64 *mr_align(__be64 *ptr, int align) +{ + unsigned long mask = align - 1; + + return (__be64 *)(((unsigned long)ptr + mask) & ~mask); +} + +static int order2idx(struct mlx5_ib_dev *dev, int order) +{ + struct mlx5_mr_cache *cache = &dev->cache; + + if (order < cache->ent[0].order) + return 0; + else + return order - cache->ent[0].order; +} + +static int add_keys(struct mlx5_ib_dev *dev, int c, int num) +{ + struct device *ddev = dev->ib_dev.dma_device; + struct mlx5_mr_cache *cache = &dev->cache; + struct mlx5_cache_ent *ent = &cache->ent[c]; + struct mlx5_create_mkey_mbox_in *in; + struct mlx5_ib_mr *mr; + int npages = 1 << ent->order; + int size = sizeof(u64) * npages; + int err = 0; + int i; + + in = kzalloc(sizeof(*in), GFP_KERNEL); + if (!in) + return -ENOMEM; + + for (i = 0; i < num; i++) { + mr = kzalloc(sizeof(*mr), GFP_KERNEL); + if (!mr) { + err = -ENOMEM; + goto out; + } + mr->order = ent->order; + mr->umred = 1; + mr->pas = kmalloc(size + 0x3f, GFP_KERNEL); + if (!mr->pas) { + kfree(mr); + err = -ENOMEM; + goto out; + } + mr->dma = dma_map_single(ddev, mr_align(mr->pas, 0x40), size, + DMA_TO_DEVICE); + if (dma_mapping_error(ddev, mr->dma)) { + kfree(mr->pas); + kfree(mr); + err = -ENOMEM; + goto out; + } + + in->seg.status = 1 << 6; + in->seg.xlt_oct_size = cpu_to_be32((npages + 1) / 2); + in->seg.qpn_mkey7_0 = cpu_to_be32(0xffffff << 8); + in->seg.flags = MLX5_ACCESS_MODE_MTT | MLX5_PERM_UMR_EN; + in->seg.log2_page_size = 12; + + err = mlx5_core_create_mkey(&dev->mdev, &mr->mmr, in, + sizeof(*in)); + if (err) { + mlx5_ib_warn(dev, "create mkey failed %d\n", err); + dma_unmap_single(ddev, mr->dma, size, DMA_TO_DEVICE); + kfree(mr->pas); + kfree(mr); + goto out; + } + cache->last_add = jiffies; + + spin_lock(&ent->lock); + list_add_tail(&mr->list, &ent->head); + ent->cur++; + ent->size++; + spin_unlock(&ent->lock); + } + +out: + kfree(in); + return err; +} + +static void remove_keys(struct mlx5_ib_dev *dev, int c, int num) +{ + struct device *ddev = dev->ib_dev.dma_device; + struct mlx5_mr_cache *cache = &dev->cache; + struct mlx5_cache_ent *ent = &cache->ent[c]; + struct mlx5_ib_mr *mr; + int size; + int err; + int i; + + for (i = 0; i < num; i++) { + spin_lock(&ent->lock); + if (list_empty(&ent->head)) { + spin_unlock(&ent->lock); + return; + } + mr = list_first_entry(&ent->head, struct mlx5_ib_mr, list); + list_del(&mr->list); + ent->cur--; + ent->size--; + spin_unlock(&ent->lock); + err = mlx5_core_destroy_mkey(&dev->mdev, &mr->mmr); + if (err) { + mlx5_ib_warn(dev, "failed destroy mkey\n"); + } else { + size = ALIGN(sizeof(u64) * (1 << mr->order), 0x40); + dma_unmap_single(ddev, mr->dma, size, DMA_TO_DEVICE); + kfree(mr->pas); + kfree(mr); + } + } +} + +static ssize_t size_write(struct file *filp, const char __user *buf, + size_t count, loff_t *pos) +{ + struct mlx5_cache_ent *ent = filp->private_data; + struct mlx5_ib_dev *dev = ent->dev; + char lbuf[20]; + u32 var; + int err; + int c; + + if (copy_from_user(lbuf, buf, sizeof(lbuf))) + return -EPERM; + + c = order2idx(dev, ent->order); + lbuf[sizeof(lbuf) - 1] = 0; + + if (sscanf(lbuf, "%u", &var) != 1) + return -EINVAL; + + if (var < ent->limit) + return -EINVAL; + + if (var > ent->size) { + err = add_keys(dev, c, var - ent->size); + if (err) + return err; + } else if (var < ent->size) { + remove_keys(dev, c, ent->size - var); + } + + return count; +} + +static ssize_t size_read(struct file *filp, char __user *buf, size_t count, + loff_t *pos) +{ + struct mlx5_cache_ent *ent = filp->private_data; + char lbuf[20]; + int err; + + if (*pos) + return 0; + + err = snprintf(lbuf, sizeof(lbuf), "%d\n", ent->size); + if (err < 0) + return err; + + if (copy_to_user(buf, lbuf, err)) + return -EPERM; + + *pos += err; + + return err; +} + +static const struct file_operations size_fops = { + .owner = THIS_MODULE, + .open = simple_open, + .write = size_write, + .read = size_read, +}; + +static ssize_t limit_write(struct file *filp, const char __user *buf, + size_t count, loff_t *pos) +{ + struct mlx5_cache_ent *ent = filp->private_data; + struct mlx5_ib_dev *dev = ent->dev; + char lbuf[20]; + u32 var; + int err; + int c; + + if (copy_from_user(lbuf, buf, sizeof(lbuf))) + return -EPERM; + + c = order2idx(dev, ent->order); + lbuf[sizeof(lbuf) - 1] = 0; + + if (sscanf(lbuf, "%u", &var) != 1) + return -EINVAL; + + if (var > ent->size) + return -EINVAL; + + ent->limit = var; + + if (ent->cur < ent->limit) { + err = add_keys(dev, c, 2 * ent->limit - ent->cur); + if (err) + return err; + } + + return count; +} + +static ssize_t limit_read(struct file *filp, char __user *buf, size_t count, + loff_t *pos) +{ + struct mlx5_cache_ent *ent = filp->private_data; + char lbuf[20]; + int err; + + if (*pos) + return 0; + + err = snprintf(lbuf, sizeof(lbuf), "%d\n", ent->limit); + if (err < 0) + return err; + + if (copy_to_user(buf, lbuf, err)) + return -EPERM; + + *pos += err; + + return err; +} + +static const struct file_operations limit_fops = { + .owner = THIS_MODULE, + .open = simple_open, + .write = limit_write, + .read = limit_read, +}; + +static int someone_adding(struct mlx5_mr_cache *cache) +{ + int i; + + for (i = 0; i < MAX_MR_CACHE_ENTRIES; i++) { + if (cache->ent[i].cur < cache->ent[i].limit) + return 1; + } + + return 0; +} + +static void __cache_work_func(struct mlx5_cache_ent *ent) +{ + struct mlx5_ib_dev *dev = ent->dev; + struct mlx5_mr_cache *cache = &dev->cache; + int i = order2idx(dev, ent->order); + + if (cache->stopped) + return; + + ent = &dev->cache.ent[i]; + if (ent->cur < 2 * ent->limit) { + add_keys(dev, i, 1); + if (ent->cur < 2 * ent->limit) + queue_work(cache->wq, &ent->work); + } else if (ent->cur > 2 * ent->limit) { + if (!someone_adding(cache) && + time_after(jiffies, cache->last_add + 60 * HZ)) { + remove_keys(dev, i, 1); + if (ent->cur > ent->limit) + queue_work(cache->wq, &ent->work); + } else { + queue_delayed_work(cache->wq, &ent->dwork, 60 * HZ); + } + } +} + +static void delayed_cache_work_func(struct work_struct *work) +{ + struct mlx5_cache_ent *ent; + + ent = container_of(work, struct mlx5_cache_ent, dwork.work); + __cache_work_func(ent); +} + +static void cache_work_func(struct work_struct *work) +{ + struct mlx5_cache_ent *ent; + + ent = container_of(work, struct mlx5_cache_ent, work); + __cache_work_func(ent); +} + +static struct mlx5_ib_mr *alloc_cached_mr(struct mlx5_ib_dev *dev, int order) +{ + struct mlx5_mr_cache *cache = &dev->cache; + struct mlx5_ib_mr *mr = NULL; + struct mlx5_cache_ent *ent; + int c; + int i; + + c = order2idx(dev, order); + if (c < 0 || c >= MAX_MR_CACHE_ENTRIES) { + mlx5_ib_warn(dev, "order %d, cache index %d\n", order, c); + return NULL; + } + + for (i = c; i < MAX_MR_CACHE_ENTRIES; i++) { + ent = &cache->ent[i]; + + mlx5_ib_dbg(dev, "order %d, cache index %d\n", ent->order, i); + + spin_lock(&ent->lock); + if (!list_empty(&ent->head)) { + mr = list_first_entry(&ent->head, struct mlx5_ib_mr, + list); + list_del(&mr->list); + ent->cur--; + spin_unlock(&ent->lock); + if (ent->cur < ent->limit) + queue_work(cache->wq, &ent->work); + break; + } + spin_unlock(&ent->lock); + + queue_work(cache->wq, &ent->work); + + if (mr) + break; + } + + if (!mr) + cache->ent[c].miss++; + + return mr; +} + +static void free_cached_mr(struct mlx5_ib_dev *dev, struct mlx5_ib_mr *mr) +{ + struct mlx5_mr_cache *cache = &dev->cache; + struct mlx5_cache_ent *ent; + int shrink = 0; + int c; + + c = order2idx(dev, mr->order); + if (c < 0 || c >= MAX_MR_CACHE_ENTRIES) { + mlx5_ib_warn(dev, "order %d, cache index %d\n", mr->order, c); + return; + } + ent = &cache->ent[c]; + spin_lock(&ent->lock); + list_add_tail(&mr->list, &ent->head); + ent->cur++; + if (ent->cur > 2 * ent->limit) + shrink = 1; + spin_unlock(&ent->lock); + + if (shrink) + queue_work(cache->wq, &ent->work); +} + +static void clean_keys(struct mlx5_ib_dev *dev, int c) +{ + struct device *ddev = dev->ib_dev.dma_device; + struct mlx5_mr_cache *cache = &dev->cache; + struct mlx5_cache_ent *ent = &cache->ent[c]; + struct mlx5_ib_mr *mr; + int size; + int err; + + while (1) { + spin_lock(&ent->lock); + if (list_empty(&ent->head)) { + spin_unlock(&ent->lock); + return; + } + mr = list_first_entry(&ent->head, struct mlx5_ib_mr, list); + list_del(&mr->list); + ent->cur--; + ent->size--; + spin_unlock(&ent->lock); + err = mlx5_core_destroy_mkey(&dev->mdev, &mr->mmr); + if (err) { + mlx5_ib_warn(dev, "failed destroy mkey\n"); + } else { + size = ALIGN(sizeof(u64) * (1 << mr->order), 0x40); + dma_unmap_single(ddev, mr->dma, size, DMA_TO_DEVICE); + kfree(mr->pas); + kfree(mr); + } + } +} + +static int mlx5_mr_cache_debugfs_init(struct mlx5_ib_dev *dev) +{ + struct mlx5_mr_cache *cache = &dev->cache; + struct mlx5_cache_ent *ent; + int i; + + if (!mlx5_debugfs_root) + return 0; + + cache->root = debugfs_create_dir("mr_cache", dev->mdev.priv.dbg_root); + if (!cache->root) + return -ENOMEM; + + for (i = 0; i < MAX_MR_CACHE_ENTRIES; i++) { + ent = &cache->ent[i]; + sprintf(ent->name, "%d", ent->order); + ent->dir = debugfs_create_dir(ent->name, cache->root); + if (!ent->dir) + return -ENOMEM; + + ent->fsize = debugfs_create_file("size", 0600, ent->dir, ent, + &size_fops); + if (!ent->fsize) + return -ENOMEM; + + ent->flimit = debugfs_create_file("limit", 0600, ent->dir, ent, + &limit_fops); + if (!ent->flimit) + return -ENOMEM; + + ent->fcur = debugfs_create_u32("cur", 0400, ent->dir, + &ent->cur); + if (!ent->fcur) + return -ENOMEM; + + ent->fmiss = debugfs_create_u32("miss", 0600, ent->dir, + &ent->miss); + if (!ent->fmiss) + return -ENOMEM; + } + + return 0; +} + +static void mlx5_mr_cache_debugfs_cleanup(struct mlx5_ib_dev *dev) +{ + if (!mlx5_debugfs_root) + return; + + debugfs_remove_recursive(dev->cache.root); +} + +int mlx5_mr_cache_init(struct mlx5_ib_dev *dev) +{ + struct mlx5_mr_cache *cache = &dev->cache; + struct mlx5_cache_ent *ent; + int limit; + int size; + int err; + int i; + + cache->wq = create_singlethread_workqueue("mkey_cache"); + if (!cache->wq) { + mlx5_ib_warn(dev, "failed to create work queue\n"); + return -ENOMEM; + } + + for (i = 0; i < MAX_MR_CACHE_ENTRIES; i++) { + INIT_LIST_HEAD(&cache->ent[i].head); + spin_lock_init(&cache->ent[i].lock); + + ent = &cache->ent[i]; + INIT_LIST_HEAD(&ent->head); + spin_lock_init(&ent->lock); + ent->order = i + 2; + ent->dev = dev; + + if (dev->mdev.profile->mask & MLX5_PROF_MASK_MR_CACHE) { + size = dev->mdev.profile->mr_cache[i].size; + limit = dev->mdev.profile->mr_cache[i].limit; + } else { + size = DEF_CACHE_SIZE; + limit = 0; + } + INIT_WORK(&ent->work, cache_work_func); + INIT_DELAYED_WORK(&ent->dwork, delayed_cache_work_func); + ent->limit = limit; + queue_work(cache->wq, &ent->work); + } + + err = mlx5_mr_cache_debugfs_init(dev); + if (err) + mlx5_ib_warn(dev, "cache debugfs failure\n"); + + return 0; +} + +int mlx5_mr_cache_cleanup(struct mlx5_ib_dev *dev) +{ + int i; + + dev->cache.stopped = 1; + destroy_workqueue(dev->cache.wq); + + mlx5_mr_cache_debugfs_cleanup(dev); + + for (i = 0; i < MAX_MR_CACHE_ENTRIES; i++) + clean_keys(dev, i); + + return 0; +} + +struct ib_mr *mlx5_ib_get_dma_mr(struct ib_pd *pd, int acc) +{ + struct mlx5_ib_dev *dev = to_mdev(pd->device); + struct mlx5_core_dev *mdev = &dev->mdev; + struct mlx5_create_mkey_mbox_in *in; + struct mlx5_mkey_seg *seg; + struct mlx5_ib_mr *mr; + int err; + + mr = kzalloc(sizeof(*mr), GFP_KERNEL); + if (!mr) + return ERR_PTR(-ENOMEM); + + in = kzalloc(sizeof(*in), GFP_KERNEL); + if (!in) { + err = -ENOMEM; + goto err_free; + } + + seg = &in->seg; + seg->flags = convert_access(acc) | MLX5_ACCESS_MODE_PA; + seg->flags_pd = cpu_to_be32(to_mpd(pd)->pdn | MLX5_MKEY_LEN64); + seg->qpn_mkey7_0 = cpu_to_be32(0xffffff << 8); + seg->start_addr = 0; + + err = mlx5_core_create_mkey(mdev, &mr->mmr, in, sizeof(*in)); + if (err) + goto err_in; + + kfree(in); + mr->ibmr.lkey = mr->mmr.key; + mr->ibmr.rkey = mr->mmr.key; + mr->umem = NULL; + + return &mr->ibmr; + +err_in: + kfree(in); + +err_free: + kfree(mr); + + return ERR_PTR(err); +} + +static int get_octo_len(u64 addr, u64 len, int page_size) +{ + u64 offset; + int npages; + + offset = addr & (page_size - 1); + npages = ALIGN(len + offset, page_size) >> ilog2(page_size); + return (npages + 1) / 2; +} + +static int use_umr(int order) +{ + return order <= 17; +} + +static void prep_umr_reg_wqe(struct ib_pd *pd, struct ib_send_wr *wr, + struct ib_sge *sg, u64 dma, int n, u32 key, + int page_shift, u64 virt_addr, u64 len, + int access_flags) +{ + struct mlx5_ib_dev *dev = to_mdev(pd->device); + struct ib_mr *mr = dev->umrc.mr; + + sg->addr = dma; + sg->length = ALIGN(sizeof(u64) * n, 64); + sg->lkey = mr->lkey; + + wr->next = NULL; + wr->send_flags = 0; + wr->sg_list = sg; + if (n) + wr->num_sge = 1; + else + wr->num_sge = 0; + + wr->opcode = MLX5_IB_WR_UMR; + wr->wr.fast_reg.page_list_len = n; + wr->wr.fast_reg.page_shift = page_shift; + wr->wr.fast_reg.rkey = key; + wr->wr.fast_reg.iova_start = virt_addr; + wr->wr.fast_reg.length = len; + wr->wr.fast_reg.access_flags = access_flags; + wr->wr.fast_reg.page_list = (struct ib_fast_reg_page_list *)pd; +} + +static void prep_umr_unreg_wqe(struct mlx5_ib_dev *dev, + struct ib_send_wr *wr, u32 key) +{ + wr->send_flags = MLX5_IB_SEND_UMR_UNREG; + wr->opcode = MLX5_IB_WR_UMR; + wr->wr.fast_reg.rkey = key; +} + +void mlx5_umr_cq_handler(struct ib_cq *cq, void *cq_context) +{ + struct mlx5_ib_mr *mr; + struct ib_wc wc; + int err; + + while (1) { + err = ib_poll_cq(cq, 1, &wc); + if (err < 0) { + pr_warn("poll cq error %d\n", err); + return; + } + if (err == 0) + break; + + mr = (struct mlx5_ib_mr *)(unsigned long)wc.wr_id; + mr->status = wc.status; + complete(&mr->done); + } + ib_req_notify_cq(cq, IB_CQ_NEXT_COMP); +} + +static struct mlx5_ib_mr *reg_umr(struct ib_pd *pd, struct ib_umem *umem, + u64 virt_addr, u64 len, int npages, + int page_shift, int order, int access_flags) +{ + struct mlx5_ib_dev *dev = to_mdev(pd->device); + struct umr_common *umrc = &dev->umrc; + struct ib_send_wr wr, *bad; + struct mlx5_ib_mr *mr; + struct ib_sge sg; + int err; + int i; + + for (i = 0; i < 10; i++) { + mr = alloc_cached_mr(dev, order); + if (mr) + break; + + err = add_keys(dev, order2idx(dev, order), 1); + if (err) { + mlx5_ib_warn(dev, "add_keys failed\n"); + break; + } + } + + if (!mr) + return ERR_PTR(-EAGAIN); + + mlx5_ib_populate_pas(dev, umem, page_shift, mr_align(mr->pas, 0x40), 1); + + memset(&wr, 0, sizeof(wr)); + wr.wr_id = (u64)(unsigned long)mr; + prep_umr_reg_wqe(pd, &wr, &sg, mr->dma, npages, mr->mmr.key, page_shift, virt_addr, len, access_flags); + + /* We serialize polls so one process does not kidnap another's + * completion. This is not a problem since wr is completed in + * around 1 usec + */ + down(&umrc->sem); + init_completion(&mr->done); + err = ib_post_send(umrc->qp, &wr, &bad); + if (err) { + mlx5_ib_warn(dev, "post send failed, err %d\n", err); + up(&umrc->sem); + goto error; + } + wait_for_completion(&mr->done); + up(&umrc->sem); + + if (mr->status != IB_WC_SUCCESS) { + mlx5_ib_warn(dev, "reg umr failed\n"); + err = -EFAULT; + goto error; + } + + return mr; + +error: + free_cached_mr(dev, mr); + return ERR_PTR(err); +} + +static struct mlx5_ib_mr *reg_create(struct ib_pd *pd, u64 virt_addr, + u64 length, struct ib_umem *umem, + int npages, int page_shift, + int access_flags) +{ + struct mlx5_ib_dev *dev = to_mdev(pd->device); + struct mlx5_create_mkey_mbox_in *in; + struct mlx5_ib_mr *mr; + int inlen; + int err; + + mr = kzalloc(sizeof(*mr), GFP_KERNEL); + if (!mr) + return ERR_PTR(-ENOMEM); + + inlen = sizeof(*in) + sizeof(*in->pas) * ((npages + 1) / 2) * 2; + in = mlx5_vzalloc(inlen); + if (!in) { + err = -ENOMEM; + goto err_1; + } + mlx5_ib_populate_pas(dev, umem, page_shift, in->pas, 0); + + in->seg.flags = convert_access(access_flags) | + MLX5_ACCESS_MODE_MTT; + in->seg.flags_pd = cpu_to_be32(to_mpd(pd)->pdn); + in->seg.start_addr = cpu_to_be64(virt_addr); + in->seg.len = cpu_to_be64(length); + in->seg.bsfs_octo_size = 0; + in->seg.xlt_oct_size = cpu_to_be32(get_octo_len(virt_addr, length, 1 << page_shift)); + in->seg.log2_page_size = page_shift; + in->seg.qpn_mkey7_0 = cpu_to_be32(0xffffff << 8); + in->xlat_oct_act_size = cpu_to_be32(get_octo_len(virt_addr, length, 1 << page_shift)); + err = mlx5_core_create_mkey(&dev->mdev, &mr->mmr, in, inlen); + if (err) { + mlx5_ib_warn(dev, "create mkey failed\n"); + goto err_2; + } + mr->umem = umem; + mlx5_vfree(in); + + mlx5_ib_dbg(dev, "mkey = 0x%x\n", mr->mmr.key); + + return mr; + +err_2: + mlx5_vfree(in); + +err_1: + kfree(mr); + + return ERR_PTR(err); +} + +struct ib_mr *mlx5_ib_reg_user_mr(struct ib_pd *pd, u64 start, u64 length, + u64 virt_addr, int access_flags, + struct ib_udata *udata) +{ + struct mlx5_ib_dev *dev = to_mdev(pd->device); + struct mlx5_ib_mr *mr = NULL; + struct ib_umem *umem; + int page_shift; + int npages; + int ncont; + int order; + int err; + + mlx5_ib_dbg(dev, "start 0x%llx, virt_addr 0x%llx, length 0x%llx\n", + start, virt_addr, length); + umem = ib_umem_get(pd->uobject->context, start, length, access_flags, + 0); + if (IS_ERR(umem)) { + mlx5_ib_dbg(dev, "umem get failed\n"); + return (void *)umem; + } + + mlx5_ib_cont_pages(umem, start, &npages, &page_shift, &ncont, &order); + if (!npages) { + mlx5_ib_warn(dev, "avoid zero region\n"); + err = -EINVAL; + goto error; + } + + mlx5_ib_dbg(dev, "npages %d, ncont %d, order %d, page_shift %d\n", + npages, ncont, order, page_shift); + + if (use_umr(order)) { + mr = reg_umr(pd, umem, virt_addr, length, ncont, page_shift, + order, access_flags); + if (PTR_ERR(mr) == -EAGAIN) { + mlx5_ib_dbg(dev, "cache empty for order %d", order); + mr = NULL; + } + } + + if (!mr) + mr = reg_create(pd, virt_addr, length, umem, ncont, page_shift, + access_flags); + + if (IS_ERR(mr)) { + err = PTR_ERR(mr); + goto error; + } + + mlx5_ib_dbg(dev, "mkey 0x%x\n", mr->mmr.key); + + mr->umem = umem; + mr->npages = npages; + spin_lock(&dev->mr_lock); + dev->mdev.priv.reg_pages += npages; + spin_unlock(&dev->mr_lock); + mr->ibmr.lkey = mr->mmr.key; + mr->ibmr.rkey = mr->mmr.key; + + return &mr->ibmr; + +error: + ib_umem_release(umem); + return ERR_PTR(err); +} + +static int unreg_umr(struct mlx5_ib_dev *dev, struct mlx5_ib_mr *mr) +{ + struct umr_common *umrc = &dev->umrc; + struct ib_send_wr wr, *bad; + int err; + + memset(&wr, 0, sizeof(wr)); + wr.wr_id = (u64)(unsigned long)mr; + prep_umr_unreg_wqe(dev, &wr, mr->mmr.key); + + down(&umrc->sem); + init_completion(&mr->done); + err = ib_post_send(umrc->qp, &wr, &bad); + if (err) { + up(&umrc->sem); + mlx5_ib_dbg(dev, "err %d\n", err); + goto error; + } + wait_for_completion(&mr->done); + up(&umrc->sem); + if (mr->status != IB_WC_SUCCESS) { + mlx5_ib_warn(dev, "unreg umr failed\n"); + err = -EFAULT; + goto error; + } + return 0; + +error: + return err; +} + +int mlx5_ib_dereg_mr(struct ib_mr *ibmr) +{ + struct mlx5_ib_dev *dev = to_mdev(ibmr->device); + struct mlx5_ib_mr *mr = to_mmr(ibmr); + struct ib_umem *umem = mr->umem; + int npages = mr->npages; + int umred = mr->umred; + int err; + + if (!umred) { + err = mlx5_core_destroy_mkey(&dev->mdev, &mr->mmr); + if (err) { + mlx5_ib_warn(dev, "failed to destroy mkey 0x%x (%d)\n", + mr->mmr.key, err); + return err; + } + } else { + err = unreg_umr(dev, mr); + if (err) { + mlx5_ib_warn(dev, "failed unregister\n"); + return err; + } + free_cached_mr(dev, mr); + } + + if (umem) { + ib_umem_release(umem); + spin_lock(&dev->mr_lock); + dev->mdev.priv.reg_pages -= npages; + spin_unlock(&dev->mr_lock); + } + + if (!umred) + kfree(mr); + + return 0; +} + +struct ib_mr *mlx5_ib_alloc_fast_reg_mr(struct ib_pd *pd, + int max_page_list_len) +{ + struct mlx5_ib_dev *dev = to_mdev(pd->device); + struct mlx5_create_mkey_mbox_in *in; + struct mlx5_ib_mr *mr; + int err; + + mr = kzalloc(sizeof(*mr), GFP_KERNEL); + if (!mr) + return ERR_PTR(-ENOMEM); + + in = kzalloc(sizeof(*in), GFP_KERNEL); + if (!in) { + err = -ENOMEM; + goto err_free; + } + + in->seg.status = 1 << 6; /* free */ + in->seg.xlt_oct_size = cpu_to_be32((max_page_list_len + 1) / 2); + in->seg.qpn_mkey7_0 = cpu_to_be32(0xffffff << 8); + in->seg.flags = MLX5_PERM_UMR_EN | MLX5_ACCESS_MODE_MTT; + in->seg.flags_pd = cpu_to_be32(to_mpd(pd)->pdn); + /* + * TBD not needed - issue 197292 */ + in->seg.log2_page_size = PAGE_SHIFT; + + err = mlx5_core_create_mkey(&dev->mdev, &mr->mmr, in, sizeof(*in)); + kfree(in); + if (err) + goto err_free; + + mr->ibmr.lkey = mr->mmr.key; + mr->ibmr.rkey = mr->mmr.key; + mr->umem = NULL; + + return &mr->ibmr; + +err_free: + kfree(mr); + return ERR_PTR(err); +} + +struct ib_fast_reg_page_list *mlx5_ib_alloc_fast_reg_page_list(struct ib_device *ibdev, + int page_list_len) +{ + struct mlx5_ib_fast_reg_page_list *mfrpl; + int size = page_list_len * sizeof(u64); + + mfrpl = kmalloc(sizeof(*mfrpl), GFP_KERNEL); + if (!mfrpl) + return ERR_PTR(-ENOMEM); + + mfrpl->ibfrpl.page_list = kmalloc(size, GFP_KERNEL); + if (!mfrpl->ibfrpl.page_list) + goto err_free; + + mfrpl->mapped_page_list = dma_alloc_coherent(ibdev->dma_device, + size, &mfrpl->map, + GFP_KERNEL); + if (!mfrpl->mapped_page_list) + goto err_free; + + WARN_ON(mfrpl->map & 0x3f); + + return &mfrpl->ibfrpl; + +err_free: + kfree(mfrpl->ibfrpl.page_list); + kfree(mfrpl); + return ERR_PTR(-ENOMEM); +} + +void mlx5_ib_free_fast_reg_page_list(struct ib_fast_reg_page_list *page_list) +{ + struct mlx5_ib_fast_reg_page_list *mfrpl = to_mfrpl(page_list); + struct mlx5_ib_dev *dev = to_mdev(page_list->device); + int size = page_list->max_page_list_len * sizeof(u64); + + dma_free_coherent(&dev->mdev.pdev->dev, size, mfrpl->mapped_page_list, + mfrpl->map); + kfree(mfrpl->ibfrpl.page_list); + kfree(mfrpl); +} diff --git a/drivers/infiniband/hw/mlx5/qp.c b/drivers/infiniband/hw/mlx5/qp.c new file mode 100644 index 000000000000..16ac54c9819f --- /dev/null +++ b/drivers/infiniband/hw/mlx5/qp.c @@ -0,0 +1,2524 @@ +/* + * Copyright (c) 2013, Mellanox Technologies inc. All rights reserved. + * + * This software is available to you under a choice of one of two + * licenses. You may choose to be licensed under the terms of the GNU + * General Public License (GPL) Version 2, available from the file + * COPYING in the main directory of this source tree, or the + * OpenIB.org BSD license below: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * - Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * - Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +#include <linux/module.h> +#include <rdma/ib_umem.h> +#include "mlx5_ib.h" +#include "user.h" + +/* not supported currently */ +static int wq_signature; + +enum { + MLX5_IB_ACK_REQ_FREQ = 8, +}; + +enum { + MLX5_IB_DEFAULT_SCHED_QUEUE = 0x83, + MLX5_IB_DEFAULT_QP0_SCHED_QUEUE = 0x3f, + MLX5_IB_LINK_TYPE_IB = 0, + MLX5_IB_LINK_TYPE_ETH = 1 +}; + +enum { + MLX5_IB_SQ_STRIDE = 6, + MLX5_IB_CACHE_LINE_SIZE = 64, +}; + +static const u32 mlx5_ib_opcode[] = { + [IB_WR_SEND] = MLX5_OPCODE_SEND, + [IB_WR_SEND_WITH_IMM] = MLX5_OPCODE_SEND_IMM, + [IB_WR_RDMA_WRITE] = MLX5_OPCODE_RDMA_WRITE, + [IB_WR_RDMA_WRITE_WITH_IMM] = MLX5_OPCODE_RDMA_WRITE_IMM, + [IB_WR_RDMA_READ] = MLX5_OPCODE_RDMA_READ, + [IB_WR_ATOMIC_CMP_AND_SWP] = MLX5_OPCODE_ATOMIC_CS, + [IB_WR_ATOMIC_FETCH_AND_ADD] = MLX5_OPCODE_ATOMIC_FA, + [IB_WR_SEND_WITH_INV] = MLX5_OPCODE_SEND_INVAL, + [IB_WR_LOCAL_INV] = MLX5_OPCODE_UMR, + [IB_WR_FAST_REG_MR] = MLX5_OPCODE_UMR, + [IB_WR_MASKED_ATOMIC_CMP_AND_SWP] = MLX5_OPCODE_ATOMIC_MASKED_CS, + [IB_WR_MASKED_ATOMIC_FETCH_AND_ADD] = MLX5_OPCODE_ATOMIC_MASKED_FA, + [MLX5_IB_WR_UMR] = MLX5_OPCODE_UMR, +}; + +struct umr_wr { + u64 virt_addr; + struct ib_pd *pd; + unsigned int page_shift; + unsigned int npages; + u32 length; + int access_flags; + u32 mkey; +}; + +static int is_qp0(enum ib_qp_type qp_type) +{ + return qp_type == IB_QPT_SMI; +} + +static int is_qp1(enum ib_qp_type qp_type) +{ + return qp_type == IB_QPT_GSI; +} + +static int is_sqp(enum ib_qp_type qp_type) +{ + return is_qp0(qp_type) || is_qp1(qp_type); +} + +static void *get_wqe(struct mlx5_ib_qp *qp, int offset) +{ + return mlx5_buf_offset(&qp->buf, offset); +} + +static void *get_recv_wqe(struct mlx5_ib_qp *qp, int n) +{ + return get_wqe(qp, qp->rq.offset + (n << qp->rq.wqe_shift)); +} + +void *mlx5_get_send_wqe(struct mlx5_ib_qp *qp, int n) +{ + return get_wqe(qp, qp->sq.offset + (n << MLX5_IB_SQ_STRIDE)); +} + +static void mlx5_ib_qp_event(struct mlx5_core_qp *qp, int type) +{ + struct ib_qp *ibqp = &to_mibqp(qp)->ibqp; + struct ib_event event; + + if (type == MLX5_EVENT_TYPE_PATH_MIG) + to_mibqp(qp)->port = to_mibqp(qp)->alt_port; + + if (ibqp->event_handler) { + event.device = ibqp->device; + event.element.qp = ibqp; + switch (type) { + case MLX5_EVENT_TYPE_PATH_MIG: + event.event = IB_EVENT_PATH_MIG; + break; + case MLX5_EVENT_TYPE_COMM_EST: + event.event = IB_EVENT_COMM_EST; + break; + case MLX5_EVENT_TYPE_SQ_DRAINED: + event.event = IB_EVENT_SQ_DRAINED; + break; + case MLX5_EVENT_TYPE_SRQ_LAST_WQE: + event.event = IB_EVENT_QP_LAST_WQE_REACHED; + break; + case MLX5_EVENT_TYPE_WQ_CATAS_ERROR: + event.event = IB_EVENT_QP_FATAL; + break; + case MLX5_EVENT_TYPE_PATH_MIG_FAILED: + event.event = IB_EVENT_PATH_MIG_ERR; + break; + case MLX5_EVENT_TYPE_WQ_INVAL_REQ_ERROR: + event.event = IB_EVENT_QP_REQ_ERR; + break; + case MLX5_EVENT_TYPE_WQ_ACCESS_ERROR: + event.event = IB_EVENT_QP_ACCESS_ERR; + break; + default: + pr_warn("mlx5_ib: Unexpected event type %d on QP %06x\n", type, qp->qpn); + return; + } + + ibqp->event_handler(&event, ibqp->qp_context); + } +} + +static int set_rq_size(struct mlx5_ib_dev *dev, struct ib_qp_cap *cap, + int has_rq, struct mlx5_ib_qp *qp, struct mlx5_ib_create_qp *ucmd) +{ + int wqe_size; + int wq_size; + + /* Sanity check RQ size before proceeding */ + if (cap->max_recv_wr > dev->mdev.caps.max_wqes) + return -EINVAL; + + if (!has_rq) { + qp->rq.max_gs = 0; + qp->rq.wqe_cnt = 0; + qp->rq.wqe_shift = 0; + } else { + if (ucmd) { + qp->rq.wqe_cnt = ucmd->rq_wqe_count; + qp->rq.wqe_shift = ucmd->rq_wqe_shift; + qp->rq.max_gs = (1 << qp->rq.wqe_shift) / sizeof(struct mlx5_wqe_data_seg) - qp->wq_sig; + qp->rq.max_post = qp->rq.wqe_cnt; + } else { + wqe_size = qp->wq_sig ? sizeof(struct mlx5_wqe_signature_seg) : 0; + wqe_size += cap->max_recv_sge * sizeof(struct mlx5_wqe_data_seg); + wqe_size = roundup_pow_of_two(wqe_size); + wq_size = roundup_pow_of_two(cap->max_recv_wr) * wqe_size; + wq_size = max_t(int, wq_size, MLX5_SEND_WQE_BB); + qp->rq.wqe_cnt = wq_size / wqe_size; + if (wqe_size > dev->mdev.caps.max_rq_desc_sz) { + mlx5_ib_dbg(dev, "wqe_size %d, max %d\n", + wqe_size, + dev->mdev.caps.max_rq_desc_sz); + return -EINVAL; + } + qp->rq.wqe_shift = ilog2(wqe_size); + qp->rq.max_gs = (1 << qp->rq.wqe_shift) / sizeof(struct mlx5_wqe_data_seg) - qp->wq_sig; + qp->rq.max_post = qp->rq.wqe_cnt; + } + } + + return 0; +} + +static int sq_overhead(enum ib_qp_type qp_type) +{ + int size; + + switch (qp_type) { + case IB_QPT_XRC_INI: + size = sizeof(struct mlx5_wqe_xrc_seg); + /* fall through */ + case IB_QPT_RC: + size += sizeof(struct mlx5_wqe_ctrl_seg) + + sizeof(struct mlx5_wqe_atomic_seg) + + sizeof(struct mlx5_wqe_raddr_seg); + break; + + case IB_QPT_UC: + size = sizeof(struct mlx5_wqe_ctrl_seg) + + sizeof(struct mlx5_wqe_raddr_seg); + break; + + case IB_QPT_UD: + case IB_QPT_SMI: + case IB_QPT_GSI: + size = sizeof(struct mlx5_wqe_ctrl_seg) + + sizeof(struct mlx5_wqe_datagram_seg); + break; + + case MLX5_IB_QPT_REG_UMR: + size = sizeof(struct mlx5_wqe_ctrl_seg) + + sizeof(struct mlx5_wqe_umr_ctrl_seg) + + sizeof(struct mlx5_mkey_seg); + break; + + default: + return -EINVAL; + } + + return size; +} + +static int calc_send_wqe(struct ib_qp_init_attr *attr) +{ + int inl_size = 0; + int size; + + size = sq_overhead(attr->qp_type); + if (size < 0) + return size; + + if (attr->cap.max_inline_data) { + inl_size = size + sizeof(struct mlx5_wqe_inline_seg) + + attr->cap.max_inline_data; + } + + size += attr->cap.max_send_sge * sizeof(struct mlx5_wqe_data_seg); + + return ALIGN(max_t(int, inl_size, size), MLX5_SEND_WQE_BB); +} + +static int calc_sq_size(struct mlx5_ib_dev *dev, struct ib_qp_init_attr *attr, + struct mlx5_ib_qp *qp) +{ + int wqe_size; + int wq_size; + + if (!attr->cap.max_send_wr) + return 0; + + wqe_size = calc_send_wqe(attr); + mlx5_ib_dbg(dev, "wqe_size %d\n", wqe_size); + if (wqe_size < 0) + return wqe_size; + + if (wqe_size > dev->mdev.caps.max_sq_desc_sz) { + mlx5_ib_dbg(dev, "\n"); + return -EINVAL; + } + + qp->max_inline_data = wqe_size - sq_overhead(attr->qp_type) - + sizeof(struct mlx5_wqe_inline_seg); + attr->cap.max_inline_data = qp->max_inline_data; + + wq_size = roundup_pow_of_two(attr->cap.max_send_wr * wqe_size); + qp->sq.wqe_cnt = wq_size / MLX5_SEND_WQE_BB; + qp->sq.wqe_shift = ilog2(MLX5_SEND_WQE_BB); + qp->sq.max_gs = attr->cap.max_send_sge; + qp->sq.max_post = 1 << ilog2(wq_size / wqe_size); + + return wq_size; +} + +static int set_user_buf_size(struct mlx5_ib_dev *dev, + struct mlx5_ib_qp *qp, + struct mlx5_ib_create_qp *ucmd) +{ + int desc_sz = 1 << qp->sq.wqe_shift; + + if (desc_sz > dev->mdev.caps.max_sq_desc_sz) { + mlx5_ib_warn(dev, "desc_sz %d, max_sq_desc_sz %d\n", + desc_sz, dev->mdev.caps.max_sq_desc_sz); + return -EINVAL; + } + + if (ucmd->sq_wqe_count && ((1 << ilog2(ucmd->sq_wqe_count)) != ucmd->sq_wqe_count)) { + mlx5_ib_warn(dev, "sq_wqe_count %d, sq_wqe_count %d\n", + ucmd->sq_wqe_count, ucmd->sq_wqe_count); + return -EINVAL; + } + + qp->sq.wqe_cnt = ucmd->sq_wqe_count; + + if (qp->sq.wqe_cnt > dev->mdev.caps.max_wqes) { + mlx5_ib_warn(dev, "wqe_cnt %d, max_wqes %d\n", + qp->sq.wqe_cnt, dev->mdev.caps.max_wqes); + return -EINVAL; + } + + qp->buf_size = (qp->rq.wqe_cnt << qp->rq.wqe_shift) + + (qp->sq.wqe_cnt << 6); + + return 0; +} + +static int qp_has_rq(struct ib_qp_init_attr *attr) +{ + if (attr->qp_type == IB_QPT_XRC_INI || + attr->qp_type == IB_QPT_XRC_TGT || attr->srq || + attr->qp_type == MLX5_IB_QPT_REG_UMR || + !attr->cap.max_recv_wr) + return 0; + + return 1; +} + +static int alloc_high_class_uuar(struct mlx5_uuar_info *uuari) +{ + int nuuars = uuari->num_uars * MLX5_BF_REGS_PER_PAGE; + int start_uuar; + int i; + + start_uuar = nuuars - uuari->num_low_latency_uuars; + for (i = start_uuar; i < nuuars; i++) { + if (!test_bit(i, uuari->bitmap)) { + set_bit(i, uuari->bitmap); + uuari->count[i]++; + return i; + } + } + + return -ENOMEM; +} + +static int alloc_med_class_uuar(struct mlx5_uuar_info *uuari) +{ + int nuuars = uuari->num_uars * MLX5_BF_REGS_PER_PAGE; + int minidx = 1; + int uuarn; + int end; + int i; + + end = nuuars - uuari->num_low_latency_uuars; + + for (i = 1; i < end; i++) { + uuarn = i & 3; + if (uuarn == 2 || uuarn == 3) + continue; + + if (uuari->count[i] < uuari->count[minidx]) + minidx = i; + } + + uuari->count[minidx]++; + return minidx; +} + +static int alloc_uuar(struct mlx5_uuar_info *uuari, + enum mlx5_ib_latency_class lat) +{ + int uuarn = -EINVAL; + + mutex_lock(&uuari->lock); + switch (lat) { + case MLX5_IB_LATENCY_CLASS_LOW: + uuarn = 0; + uuari->count[uuarn]++; + break; + + case MLX5_IB_LATENCY_CLASS_MEDIUM: + uuarn = alloc_med_class_uuar(uuari); + break; + + case MLX5_IB_LATENCY_CLASS_HIGH: + uuarn = alloc_high_class_uuar(uuari); + break; + + case MLX5_IB_LATENCY_CLASS_FAST_PATH: + uuarn = 2; + break; + } + mutex_unlock(&uuari->lock); + + return uuarn; +} + +static void free_med_class_uuar(struct mlx5_uuar_info *uuari, int uuarn) +{ + clear_bit(uuarn, uuari->bitmap); + --uuari->count[uuarn]; +} + +static void free_high_class_uuar(struct mlx5_uuar_info *uuari, int uuarn) +{ + clear_bit(uuarn, uuari->bitmap); + --uuari->count[uuarn]; +} + +static void free_uuar(struct mlx5_uuar_info *uuari, int uuarn) +{ + int nuuars = uuari->num_uars * MLX5_BF_REGS_PER_PAGE; + int high_uuar = nuuars - uuari->num_low_latency_uuars; + + mutex_lock(&uuari->lock); + if (uuarn == 0) { + --uuari->count[uuarn]; + goto out; + } + + if (uuarn < high_uuar) { + free_med_class_uuar(uuari, uuarn); + goto out; + } + + free_high_class_uuar(uuari, uuarn); + +out: + mutex_unlock(&uuari->lock); +} + +static enum mlx5_qp_state to_mlx5_state(enum ib_qp_state state) +{ + switch (state) { + case IB_QPS_RESET: return MLX5_QP_STATE_RST; + case IB_QPS_INIT: return MLX5_QP_STATE_INIT; + case IB_QPS_RTR: return MLX5_QP_STATE_RTR; + case IB_QPS_RTS: return MLX5_QP_STATE_RTS; + case IB_QPS_SQD: return MLX5_QP_STATE_SQD; + case IB_QPS_SQE: return MLX5_QP_STATE_SQER; + case IB_QPS_ERR: return MLX5_QP_STATE_ERR; + default: return -1; + } +} + +static int to_mlx5_st(enum ib_qp_type type) +{ + switch (type) { + case IB_QPT_RC: return MLX5_QP_ST_RC; + case IB_QPT_UC: return MLX5_QP_ST_UC; + case IB_QPT_UD: return MLX5_QP_ST_UD; + case MLX5_IB_QPT_REG_UMR: return MLX5_QP_ST_REG_UMR; + case IB_QPT_XRC_INI: + case IB_QPT_XRC_TGT: return MLX5_QP_ST_XRC; + case IB_QPT_SMI: return MLX5_QP_ST_QP0; + case IB_QPT_GSI: return MLX5_QP_ST_QP1; + case IB_QPT_RAW_IPV6: return MLX5_QP_ST_RAW_IPV6; + case IB_QPT_RAW_ETHERTYPE: return MLX5_QP_ST_RAW_ETHERTYPE; + case IB_QPT_RAW_PACKET: + case IB_QPT_MAX: + default: return -EINVAL; + } +} + +static int uuarn_to_uar_index(struct mlx5_uuar_info *uuari, int uuarn) +{ + return uuari->uars[uuarn / MLX5_BF_REGS_PER_PAGE].index; +} + +static int create_user_qp(struct mlx5_ib_dev *dev, struct ib_pd *pd, + struct mlx5_ib_qp *qp, struct ib_udata *udata, + struct mlx5_create_qp_mbox_in **in, + struct mlx5_ib_create_qp_resp *resp, int *inlen) +{ + struct mlx5_ib_ucontext *context; + struct mlx5_ib_create_qp ucmd; + int page_shift; + int uar_index; + int npages; + u32 offset; + int uuarn; + int ncont; + int err; + + err = ib_copy_from_udata(&ucmd, udata, sizeof(ucmd)); + if (err) { + mlx5_ib_dbg(dev, "copy failed\n"); + return err; + } + + context = to_mucontext(pd->uobject->context); + /* + * TBD: should come from the verbs when we have the API + */ + uuarn = alloc_uuar(&context->uuari, MLX5_IB_LATENCY_CLASS_HIGH); + if (uuarn < 0) { + mlx5_ib_dbg(dev, "failed to allocate low latency UUAR\n"); + mlx5_ib_dbg(dev, "reverting to high latency\n"); + uuarn = alloc_uuar(&context->uuari, MLX5_IB_LATENCY_CLASS_LOW); + if (uuarn < 0) { + mlx5_ib_dbg(dev, "uuar allocation failed\n"); + return uuarn; + } + } + + uar_index = uuarn_to_uar_index(&context->uuari, uuarn); + mlx5_ib_dbg(dev, "uuarn 0x%x, uar_index 0x%x\n", uuarn, uar_index); + + err = set_user_buf_size(dev, qp, &ucmd); + if (err) + goto err_uuar; + + qp->umem = ib_umem_get(pd->uobject->context, ucmd.buf_addr, + qp->buf_size, 0, 0); + if (IS_ERR(qp->umem)) { + mlx5_ib_dbg(dev, "umem_get failed\n"); + err = PTR_ERR(qp->umem); + goto err_uuar; + } + + mlx5_ib_cont_pages(qp->umem, ucmd.buf_addr, &npages, &page_shift, + &ncont, NULL); + err = mlx5_ib_get_buf_offset(ucmd.buf_addr, page_shift, &offset); + if (err) { + mlx5_ib_warn(dev, "bad offset\n"); + goto err_umem; + } + mlx5_ib_dbg(dev, "addr 0x%llx, size %d, npages %d, page_shift %d, ncont %d, offset %d\n", + ucmd.buf_addr, qp->buf_size, npages, page_shift, ncont, offset); + + *inlen = sizeof(**in) + sizeof(*(*in)->pas) * ncont; + *in = mlx5_vzalloc(*inlen); + if (!*in) { + err = -ENOMEM; + goto err_umem; + } + mlx5_ib_populate_pas(dev, qp->umem, page_shift, (*in)->pas, 0); + (*in)->ctx.log_pg_sz_remote_qpn = + cpu_to_be32((page_shift - PAGE_SHIFT) << 24); + (*in)->ctx.params2 = cpu_to_be32(offset << 6); + + (*in)->ctx.qp_counter_set_usr_page = cpu_to_be32(uar_index); + resp->uuar_index = uuarn; + qp->uuarn = uuarn; + + err = mlx5_ib_db_map_user(context, ucmd.db_addr, &qp->db); + if (err) { + mlx5_ib_dbg(dev, "map failed\n"); + goto err_free; + } + + err = ib_copy_to_udata(udata, resp, sizeof(*resp)); + if (err) { + mlx5_ib_dbg(dev, "copy failed\n"); + goto err_unmap; + } + qp->create_type = MLX5_QP_USER; + + return 0; + +err_unmap: + mlx5_ib_db_unmap_user(context, &qp->db); + +err_free: + mlx5_vfree(*in); + +err_umem: + ib_umem_release(qp->umem); + +err_uuar: + free_uuar(&context->uuari, uuarn); + return err; +} + +static void destroy_qp_user(struct ib_pd *pd, struct mlx5_ib_qp *qp) +{ + struct mlx5_ib_ucontext *context; + + context = to_mucontext(pd->uobject->context); + mlx5_ib_db_unmap_user(context, &qp->db); + ib_umem_release(qp->umem); + free_uuar(&context->uuari, qp->uuarn); +} + +static int create_kernel_qp(struct mlx5_ib_dev *dev, + struct ib_qp_init_attr *init_attr, + struct mlx5_ib_qp *qp, + struct mlx5_create_qp_mbox_in **in, int *inlen) +{ + enum mlx5_ib_latency_class lc = MLX5_IB_LATENCY_CLASS_LOW; + struct mlx5_uuar_info *uuari; + int uar_index; + int uuarn; + int err; + + uuari = &dev->mdev.priv.uuari; + if (init_attr->create_flags & IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK) + qp->flags |= MLX5_IB_QP_BLOCK_MULTICAST_LOOPBACK; + + if (init_attr->qp_type == MLX5_IB_QPT_REG_UMR) + lc = MLX5_IB_LATENCY_CLASS_FAST_PATH; + + uuarn = alloc_uuar(uuari, lc); + if (uuarn < 0) { + mlx5_ib_dbg(dev, "\n"); + return -ENOMEM; + } + + qp->bf = &uuari->bfs[uuarn]; + uar_index = qp->bf->uar->index; + + err = calc_sq_size(dev, init_attr, qp); + if (err < 0) { + mlx5_ib_dbg(dev, "err %d\n", err); + goto err_uuar; + } + + qp->rq.offset = 0; + qp->sq.offset = qp->rq.wqe_cnt << qp->rq.wqe_shift; + qp->buf_size = err + (qp->rq.wqe_cnt << qp->rq.wqe_shift); + + err = mlx5_buf_alloc(&dev->mdev, qp->buf_size, PAGE_SIZE * 2, &qp->buf); + if (err) { + mlx5_ib_dbg(dev, "err %d\n", err); + goto err_uuar; + } + + qp->sq.qend = mlx5_get_send_wqe(qp, qp->sq.wqe_cnt); + *inlen = sizeof(**in) + sizeof(*(*in)->pas) * qp->buf.npages; + *in = mlx5_vzalloc(*inlen); + if (!*in) { + err = -ENOMEM; + goto err_buf; + } + (*in)->ctx.qp_counter_set_usr_page = cpu_to_be32(uar_index); + (*in)->ctx.log_pg_sz_remote_qpn = cpu_to_be32((qp->buf.page_shift - PAGE_SHIFT) << 24); + /* Set "fast registration enabled" for all kernel QPs */ + (*in)->ctx.params1 |= cpu_to_be32(1 << 11); + (*in)->ctx.sq_crq_size |= cpu_to_be16(1 << 4); + + mlx5_fill_page_array(&qp->buf, (*in)->pas); + + err = mlx5_db_alloc(&dev->mdev, &qp->db); + if (err) { + mlx5_ib_dbg(dev, "err %d\n", err); + goto err_free; + } + + qp->db.db[0] = 0; + qp->db.db[1] = 0; + + qp->sq.wrid = kmalloc(qp->sq.wqe_cnt * sizeof(*qp->sq.wrid), GFP_KERNEL); + qp->sq.wr_data = kmalloc(qp->sq.wqe_cnt * sizeof(*qp->sq.wr_data), GFP_KERNEL); + qp->rq.wrid = kmalloc(qp->rq.wqe_cnt * sizeof(*qp->rq.wrid), GFP_KERNEL); + qp->sq.w_list = kmalloc(qp->sq.wqe_cnt * sizeof(*qp->sq.w_list), GFP_KERNEL); + qp->sq.wqe_head = kmalloc(qp->sq.wqe_cnt * sizeof(*qp->sq.wqe_head), GFP_KERNEL); + + if (!qp->sq.wrid || !qp->sq.wr_data || !qp->rq.wrid || + !qp->sq.w_list || !qp->sq.wqe_head) { + err = -ENOMEM; + goto err_wrid; + } + qp->create_type = MLX5_QP_KERNEL; + + return 0; + +err_wrid: + mlx5_db_free(&dev->mdev, &qp->db); + kfree(qp->sq.wqe_head); + kfree(qp->sq.w_list); + kfree(qp->sq.wrid); + kfree(qp->sq.wr_data); + kfree(qp->rq.wrid); + +err_free: + mlx5_vfree(*in); + +err_buf: + mlx5_buf_free(&dev->mdev, &qp->buf); + +err_uuar: + free_uuar(&dev->mdev.priv.uuari, uuarn); + return err; +} + +static void destroy_qp_kernel(struct mlx5_ib_dev *dev, struct mlx5_ib_qp *qp) +{ + mlx5_db_free(&dev->mdev, &qp->db); + kfree(qp->sq.wqe_head); + kfree(qp->sq.w_list); + kfree(qp->sq.wrid); + kfree(qp->sq.wr_data); + kfree(qp->rq.wrid); + mlx5_buf_free(&dev->mdev, &qp->buf); + free_uuar(&dev->mdev.priv.uuari, qp->bf->uuarn); +} + +static __be32 get_rx_type(struct mlx5_ib_qp *qp, struct ib_qp_init_attr *attr) +{ + if (attr->srq || (attr->qp_type == IB_QPT_XRC_TGT) || + (attr->qp_type == IB_QPT_XRC_INI)) + return cpu_to_be32(MLX5_SRQ_RQ); + else if (!qp->has_rq) + return cpu_to_be32(MLX5_ZERO_LEN_RQ); + else + return cpu_to_be32(MLX5_NON_ZERO_RQ); +} + +static int is_connected(enum ib_qp_type qp_type) +{ + if (qp_type == IB_QPT_RC || qp_type == IB_QPT_UC) + return 1; + + return 0; +} + +static int create_qp_common(struct mlx5_ib_dev *dev, struct ib_pd *pd, + struct ib_qp_init_attr *init_attr, + struct ib_udata *udata, struct mlx5_ib_qp *qp) +{ + struct mlx5_ib_resources *devr = &dev->devr; + struct mlx5_ib_create_qp_resp resp; + struct mlx5_create_qp_mbox_in *in; + struct mlx5_ib_create_qp ucmd; + int inlen = sizeof(*in); + int err; + + mutex_init(&qp->mutex); + spin_lock_init(&qp->sq.lock); + spin_lock_init(&qp->rq.lock); + + if (init_attr->sq_sig_type == IB_SIGNAL_ALL_WR) + qp->sq_signal_bits = MLX5_WQE_CTRL_CQ_UPDATE; + + if (pd && pd->uobject) { + if (ib_copy_from_udata(&ucmd, udata, sizeof(ucmd))) { + mlx5_ib_dbg(dev, "copy failed\n"); + return -EFAULT; + } + + qp->wq_sig = !!(ucmd.flags & MLX5_QP_FLAG_SIGNATURE); + qp->scat_cqe = !!(ucmd.flags & MLX5_QP_FLAG_SCATTER_CQE); + } else { + qp->wq_sig = !!wq_signature; + } + + qp->has_rq = qp_has_rq(init_attr); + err = set_rq_size(dev, &init_attr->cap, qp->has_rq, + qp, (pd && pd->uobject) ? &ucmd : NULL); + if (err) { + mlx5_ib_dbg(dev, "err %d\n", err); + return err; + } + + if (pd) { + if (pd->uobject) { + mlx5_ib_dbg(dev, "requested sq_wqe_count (%d)\n", ucmd.sq_wqe_count); + if (ucmd.rq_wqe_shift != qp->rq.wqe_shift || + ucmd.rq_wqe_count != qp->rq.wqe_cnt) { + mlx5_ib_dbg(dev, "invalid rq params\n"); + return -EINVAL; + } + if (ucmd.sq_wqe_count > dev->mdev.caps.max_wqes) { + mlx5_ib_dbg(dev, "requested sq_wqe_count (%d) > max allowed (%d)\n", + ucmd.sq_wqe_count, dev->mdev.caps.max_wqes); + return -EINVAL; + } + err = create_user_qp(dev, pd, qp, udata, &in, &resp, &inlen); + if (err) + mlx5_ib_dbg(dev, "err %d\n", err); + } else { + err = create_kernel_qp(dev, init_attr, qp, &in, &inlen); + if (err) + mlx5_ib_dbg(dev, "err %d\n", err); + else + qp->pa_lkey = to_mpd(pd)->pa_lkey; + } + + if (err) + return err; + } else { + in = mlx5_vzalloc(sizeof(*in)); + if (!in) + return -ENOMEM; + + qp->create_type = MLX5_QP_EMPTY; + } + + if (is_sqp(init_attr->qp_type)) + qp->port = init_attr->port_num; + + in->ctx.flags = cpu_to_be32(to_mlx5_st(init_attr->qp_type) << 16 | + MLX5_QP_PM_MIGRATED << 11); + + if (init_attr->qp_type != MLX5_IB_QPT_REG_UMR) + in->ctx.flags_pd = cpu_to_be32(to_mpd(pd ? pd : devr->p0)->pdn); + else + in->ctx.flags_pd = cpu_to_be32(MLX5_QP_LAT_SENSITIVE); + + if (qp->wq_sig) + in->ctx.flags_pd |= cpu_to_be32(MLX5_QP_ENABLE_SIG); + + if (qp->scat_cqe && is_connected(init_attr->qp_type)) { + int rcqe_sz; + int scqe_sz; + + rcqe_sz = mlx5_ib_get_cqe_size(dev, init_attr->recv_cq); + scqe_sz = mlx5_ib_get_cqe_size(dev, init_attr->send_cq); + + if (rcqe_sz == 128) + in->ctx.cs_res = MLX5_RES_SCAT_DATA64_CQE; + else + in->ctx.cs_res = MLX5_RES_SCAT_DATA32_CQE; + + if (init_attr->sq_sig_type == IB_SIGNAL_ALL_WR) { + if (scqe_sz == 128) + in->ctx.cs_req = MLX5_REQ_SCAT_DATA64_CQE; + else + in->ctx.cs_req = MLX5_REQ_SCAT_DATA32_CQE; + } + } + + if (qp->rq.wqe_cnt) { + in->ctx.rq_size_stride = (qp->rq.wqe_shift - 4); + in->ctx.rq_size_stride |= ilog2(qp->rq.wqe_cnt) << 3; + } + + in->ctx.rq_type_srqn = get_rx_type(qp, init_attr); + + if (qp->sq.wqe_cnt) + in->ctx.sq_crq_size |= cpu_to_be16(ilog2(qp->sq.wqe_cnt) << 11); + else + in->ctx.sq_crq_size |= cpu_to_be16(0x8000); + + /* Set default resources */ + switch (init_attr->qp_type) { + case IB_QPT_XRC_TGT: + in->ctx.cqn_recv = cpu_to_be32(to_mcq(devr->c0)->mcq.cqn); + in->ctx.cqn_send = cpu_to_be32(to_mcq(devr->c0)->mcq.cqn); + in->ctx.rq_type_srqn |= cpu_to_be32(to_msrq(devr->s0)->msrq.srqn); + in->ctx.xrcd = cpu_to_be32(to_mxrcd(init_attr->xrcd)->xrcdn); + break; + case IB_QPT_XRC_INI: + in->ctx.cqn_recv = cpu_to_be32(to_mcq(devr->c0)->mcq.cqn); + in->ctx.xrcd = cpu_to_be32(to_mxrcd(devr->x1)->xrcdn); + in->ctx.rq_type_srqn |= cpu_to_be32(to_msrq(devr->s0)->msrq.srqn); + break; + default: + if (init_attr->srq) { + in->ctx.xrcd = cpu_to_be32(to_mxrcd(devr->x0)->xrcdn); + in->ctx.rq_type_srqn |= cpu_to_be32(to_msrq(init_attr->srq)->msrq.srqn); + } else { + in->ctx.xrcd = cpu_to_be32(to_mxrcd(devr->x1)->xrcdn); + in->ctx.rq_type_srqn |= cpu_to_be32(to_msrq(devr->s0)->msrq.srqn); + } + } + + if (init_attr->send_cq) + in->ctx.cqn_send = cpu_to_be32(to_mcq(init_attr->send_cq)->mcq.cqn); + + if (init_attr->recv_cq) + in->ctx.cqn_recv = cpu_to_be32(to_mcq(init_attr->recv_cq)->mcq.cqn); + + in->ctx.db_rec_addr = cpu_to_be64(qp->db.dma); + + err = mlx5_core_create_qp(&dev->mdev, &qp->mqp, in, inlen); + if (err) { + mlx5_ib_dbg(dev, "create qp failed\n"); + goto err_create; + } + + mlx5_vfree(in); + /* Hardware wants QPN written in big-endian order (after + * shifting) for send doorbell. Precompute this value to save + * a little bit when posting sends. + */ + qp->doorbell_qpn = swab32(qp->mqp.qpn << 8); + + qp->mqp.event = mlx5_ib_qp_event; + + return 0; + +err_create: + if (qp->create_type == MLX5_QP_USER) + destroy_qp_user(pd, qp); + else if (qp->create_type == MLX5_QP_KERNEL) + destroy_qp_kernel(dev, qp); + + mlx5_vfree(in); + return err; +} + +static void mlx5_ib_lock_cqs(struct mlx5_ib_cq *send_cq, struct mlx5_ib_cq *recv_cq) + __acquires(&send_cq->lock) __acquires(&recv_cq->lock) +{ + if (send_cq) { + if (recv_cq) { + if (send_cq->mcq.cqn < recv_cq->mcq.cqn) { + spin_lock_irq(&send_cq->lock); + spin_lock_nested(&recv_cq->lock, + SINGLE_DEPTH_NESTING); + } else if (send_cq->mcq.cqn == recv_cq->mcq.cqn) { + spin_lock_irq(&send_cq->lock); + __acquire(&recv_cq->lock); + } else { + spin_lock_irq(&recv_cq->lock); + spin_lock_nested(&send_cq->lock, + SINGLE_DEPTH_NESTING); + } + } else { + spin_lock_irq(&send_cq->lock); + } + } else if (recv_cq) { + spin_lock_irq(&recv_cq->lock); + } +} + +static void mlx5_ib_unlock_cqs(struct mlx5_ib_cq *send_cq, struct mlx5_ib_cq *recv_cq) + __releases(&send_cq->lock) __releases(&recv_cq->lock) +{ + if (send_cq) { + if (recv_cq) { + if (send_cq->mcq.cqn < recv_cq->mcq.cqn) { + spin_unlock(&recv_cq->lock); + spin_unlock_irq(&send_cq->lock); + } else if (send_cq->mcq.cqn == recv_cq->mcq.cqn) { + __release(&recv_cq->lock); + spin_unlock_irq(&send_cq->lock); + } else { + spin_unlock(&send_cq->lock); + spin_unlock_irq(&recv_cq->lock); + } + } else { + spin_unlock_irq(&send_cq->lock); + } + } else if (recv_cq) { + spin_unlock_irq(&recv_cq->lock); + } +} + +static struct mlx5_ib_pd *get_pd(struct mlx5_ib_qp *qp) +{ + return to_mpd(qp->ibqp.pd); +} + +static void get_cqs(struct mlx5_ib_qp *qp, + struct mlx5_ib_cq **send_cq, struct mlx5_ib_cq **recv_cq) +{ + switch (qp->ibqp.qp_type) { + case IB_QPT_XRC_TGT: + *send_cq = NULL; + *recv_cq = NULL; + break; + case MLX5_IB_QPT_REG_UMR: + case IB_QPT_XRC_INI: + *send_cq = to_mcq(qp->ibqp.send_cq); + *recv_cq = NULL; + break; + + case IB_QPT_SMI: + case IB_QPT_GSI: + case IB_QPT_RC: + case IB_QPT_UC: + case IB_QPT_UD: + case IB_QPT_RAW_IPV6: + case IB_QPT_RAW_ETHERTYPE: + *send_cq = to_mcq(qp->ibqp.send_cq); + *recv_cq = to_mcq(qp->ibqp.recv_cq); + break; + + case IB_QPT_RAW_PACKET: + case IB_QPT_MAX: + default: + *send_cq = NULL; + *recv_cq = NULL; + break; + } +} + +static void destroy_qp_common(struct mlx5_ib_dev *dev, struct mlx5_ib_qp *qp) +{ + struct mlx5_ib_cq *send_cq, *recv_cq; + struct mlx5_modify_qp_mbox_in *in; + int err; + + in = kzalloc(sizeof(*in), GFP_KERNEL); + if (!in) + return; + if (qp->state != IB_QPS_RESET) + if (mlx5_core_qp_modify(&dev->mdev, to_mlx5_state(qp->state), + MLX5_QP_STATE_RST, in, sizeof(*in), &qp->mqp)) + mlx5_ib_warn(dev, "mlx5_ib: modify QP %06x to RESET failed\n", + qp->mqp.qpn); + + get_cqs(qp, &send_cq, &recv_cq); + + if (qp->create_type == MLX5_QP_KERNEL) { + mlx5_ib_lock_cqs(send_cq, recv_cq); + __mlx5_ib_cq_clean(recv_cq, qp->mqp.qpn, + qp->ibqp.srq ? to_msrq(qp->ibqp.srq) : NULL); + if (send_cq != recv_cq) + __mlx5_ib_cq_clean(send_cq, qp->mqp.qpn, NULL); + mlx5_ib_unlock_cqs(send_cq, recv_cq); + } + + err = mlx5_core_destroy_qp(&dev->mdev, &qp->mqp); + if (err) + mlx5_ib_warn(dev, "failed to destroy QP 0x%x\n", qp->mqp.qpn); + kfree(in); + + + if (qp->create_type == MLX5_QP_KERNEL) + destroy_qp_kernel(dev, qp); + else if (qp->create_type == MLX5_QP_USER) + destroy_qp_user(&get_pd(qp)->ibpd, qp); +} + +static const char *ib_qp_type_str(enum ib_qp_type type) +{ + switch (type) { + case IB_QPT_SMI: + return "IB_QPT_SMI"; + case IB_QPT_GSI: + return "IB_QPT_GSI"; + case IB_QPT_RC: + return "IB_QPT_RC"; + case IB_QPT_UC: + return "IB_QPT_UC"; + case IB_QPT_UD: + return "IB_QPT_UD"; + case IB_QPT_RAW_IPV6: + return "IB_QPT_RAW_IPV6"; + case IB_QPT_RAW_ETHERTYPE: + return "IB_QPT_RAW_ETHERTYPE"; + case IB_QPT_XRC_INI: + return "IB_QPT_XRC_INI"; + case IB_QPT_XRC_TGT: + return "IB_QPT_XRC_TGT"; + case IB_QPT_RAW_PACKET: + return "IB_QPT_RAW_PACKET"; + case MLX5_IB_QPT_REG_UMR: + return "MLX5_IB_QPT_REG_UMR"; + case IB_QPT_MAX: + default: + return "Invalid QP type"; + } +} + +struct ib_qp *mlx5_ib_create_qp(struct ib_pd *pd, + struct ib_qp_init_attr *init_attr, + struct ib_udata *udata) +{ + struct mlx5_ib_dev *dev; + struct mlx5_ib_qp *qp; + u16 xrcdn = 0; + int err; + + if (pd) { + dev = to_mdev(pd->device); + } else { + /* being cautious here */ + if (init_attr->qp_type != IB_QPT_XRC_TGT && + init_attr->qp_type != MLX5_IB_QPT_REG_UMR) { + pr_warn("%s: no PD for transport %s\n", __func__, + ib_qp_type_str(init_attr->qp_type)); + return ERR_PTR(-EINVAL); + } + dev = to_mdev(to_mxrcd(init_attr->xrcd)->ibxrcd.device); + } + + switch (init_attr->qp_type) { + case IB_QPT_XRC_TGT: + case IB_QPT_XRC_INI: + if (!(dev->mdev.caps.flags & MLX5_DEV_CAP_FLAG_XRC)) { + mlx5_ib_dbg(dev, "XRC not supported\n"); + return ERR_PTR(-ENOSYS); + } + init_attr->recv_cq = NULL; + if (init_attr->qp_type == IB_QPT_XRC_TGT) { + xrcdn = to_mxrcd(init_attr->xrcd)->xrcdn; + init_attr->send_cq = NULL; + } + + /* fall through */ + case IB_QPT_RC: + case IB_QPT_UC: + case IB_QPT_UD: + case IB_QPT_SMI: + case IB_QPT_GSI: + case MLX5_IB_QPT_REG_UMR: + qp = kzalloc(sizeof(*qp), GFP_KERNEL); + if (!qp) + return ERR_PTR(-ENOMEM); + + err = create_qp_common(dev, pd, init_attr, udata, qp); + if (err) { + mlx5_ib_dbg(dev, "create_qp_common failed\n"); + kfree(qp); + return ERR_PTR(err); + } + + if (is_qp0(init_attr->qp_type)) + qp->ibqp.qp_num = 0; + else if (is_qp1(init_attr->qp_type)) + qp->ibqp.qp_num = 1; + else + qp->ibqp.qp_num = qp->mqp.qpn; + + mlx5_ib_dbg(dev, "ib qpnum 0x%x, mlx qpn 0x%x, rcqn 0x%x, scqn 0x%x\n", + qp->ibqp.qp_num, qp->mqp.qpn, to_mcq(init_attr->recv_cq)->mcq.cqn, + to_mcq(init_attr->send_cq)->mcq.cqn); + + qp->xrcdn = xrcdn; + + break; + + case IB_QPT_RAW_IPV6: + case IB_QPT_RAW_ETHERTYPE: + case IB_QPT_RAW_PACKET: + case IB_QPT_MAX: + default: + mlx5_ib_dbg(dev, "unsupported qp type %d\n", + init_attr->qp_type); + /* Don't support raw QPs */ + return ERR_PTR(-EINVAL); + } + + return &qp->ibqp; +} + +int mlx5_ib_destroy_qp(struct ib_qp *qp) +{ + struct mlx5_ib_dev *dev = to_mdev(qp->device); + struct mlx5_ib_qp *mqp = to_mqp(qp); + + destroy_qp_common(dev, mqp); + + kfree(mqp); + + return 0; +} + +static __be32 to_mlx5_access_flags(struct mlx5_ib_qp *qp, const struct ib_qp_attr *attr, + int attr_mask) +{ + u32 hw_access_flags = 0; + u8 dest_rd_atomic; + u32 access_flags; + + if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC) + dest_rd_atomic = attr->max_dest_rd_atomic; + else + dest_rd_atomic = qp->resp_depth; + + if (attr_mask & IB_QP_ACCESS_FLAGS) + access_flags = attr->qp_access_flags; + else + access_flags = qp->atomic_rd_en; + + if (!dest_rd_atomic) + access_flags &= IB_ACCESS_REMOTE_WRITE; + + if (access_flags & IB_ACCESS_REMOTE_READ) + hw_access_flags |= MLX5_QP_BIT_RRE; + if (access_flags & IB_ACCESS_REMOTE_ATOMIC) + hw_access_flags |= (MLX5_QP_BIT_RAE | MLX5_ATOMIC_MODE_CX); + if (access_flags & IB_ACCESS_REMOTE_WRITE) + hw_access_flags |= MLX5_QP_BIT_RWE; + + return cpu_to_be32(hw_access_flags); +} + +enum { + MLX5_PATH_FLAG_FL = 1 << 0, + MLX5_PATH_FLAG_FREE_AR = 1 << 1, + MLX5_PATH_FLAG_COUNTER = 1 << 2, +}; + +static int ib_rate_to_mlx5(struct mlx5_ib_dev *dev, u8 rate) +{ + if (rate == IB_RATE_PORT_CURRENT) { + return 0; + } else if (rate < IB_RATE_2_5_GBPS || rate > IB_RATE_300_GBPS) { + return -EINVAL; + } else { + while (rate != IB_RATE_2_5_GBPS && + !(1 << (rate + MLX5_STAT_RATE_OFFSET) & + dev->mdev.caps.stat_rate_support)) + --rate; + } + + return rate + MLX5_STAT_RATE_OFFSET; +} + +static int mlx5_set_path(struct mlx5_ib_dev *dev, const struct ib_ah_attr *ah, + struct mlx5_qp_path *path, u8 port, int attr_mask, + u32 path_flags, const struct ib_qp_attr *attr) +{ + int err; + + path->fl = (path_flags & MLX5_PATH_FLAG_FL) ? 0x80 : 0; + path->free_ar = (path_flags & MLX5_PATH_FLAG_FREE_AR) ? 0x80 : 0; + + if (attr_mask & IB_QP_PKEY_INDEX) + path->pkey_index = attr->pkey_index; + + path->grh_mlid = ah->src_path_bits & 0x7f; + path->rlid = cpu_to_be16(ah->dlid); + + if (ah->ah_flags & IB_AH_GRH) { + path->grh_mlid |= 1 << 7; + path->mgid_index = ah->grh.sgid_index; + path->hop_limit = ah->grh.hop_limit; + path->tclass_flowlabel = + cpu_to_be32((ah->grh.traffic_class << 20) | + (ah->grh.flow_label)); + memcpy(path->rgid, ah->grh.dgid.raw, 16); + } + + err = ib_rate_to_mlx5(dev, ah->static_rate); + if (err < 0) + return err; + path->static_rate = err; + path->port = port; + + if (ah->ah_flags & IB_AH_GRH) { + if (ah->grh.sgid_index >= dev->mdev.caps.port[port - 1].gid_table_len) { + pr_err(KERN_ERR "sgid_index (%u) too large. max is %d\n", + ah->grh.sgid_index, dev->mdev.caps.port[port - 1].gid_table_len); + return -EINVAL; + } + + path->grh_mlid |= 1 << 7; + path->mgid_index = ah->grh.sgid_index; + path->hop_limit = ah->grh.hop_limit; + path->tclass_flowlabel = + cpu_to_be32((ah->grh.traffic_class << 20) | + (ah->grh.flow_label)); + memcpy(path->rgid, ah->grh.dgid.raw, 16); + } + + if (attr_mask & IB_QP_TIMEOUT) + path->ackto_lt = attr->timeout << 3; + + path->sl = ah->sl & 0xf; + + return 0; +} + +static enum mlx5_qp_optpar opt_mask[MLX5_QP_NUM_STATE][MLX5_QP_NUM_STATE][MLX5_QP_ST_MAX] = { + [MLX5_QP_STATE_INIT] = { + [MLX5_QP_STATE_INIT] = { + [MLX5_QP_ST_RC] = MLX5_QP_OPTPAR_RRE | + MLX5_QP_OPTPAR_RAE | + MLX5_QP_OPTPAR_RWE | + MLX5_QP_OPTPAR_PKEY_INDEX | + MLX5_QP_OPTPAR_PRI_PORT, + [MLX5_QP_ST_UC] = MLX5_QP_OPTPAR_RWE | + MLX5_QP_OPTPAR_PKEY_INDEX | + MLX5_QP_OPTPAR_PRI_PORT, + [MLX5_QP_ST_UD] = MLX5_QP_OPTPAR_PKEY_INDEX | + MLX5_QP_OPTPAR_Q_KEY | + MLX5_QP_OPTPAR_PRI_PORT, + }, + [MLX5_QP_STATE_RTR] = { + [MLX5_QP_ST_RC] = MLX5_QP_OPTPAR_ALT_ADDR_PATH | + MLX5_QP_OPTPAR_RRE | + MLX5_QP_OPTPAR_RAE | + MLX5_QP_OPTPAR_RWE | + MLX5_QP_OPTPAR_PKEY_INDEX, + [MLX5_QP_ST_UC] = MLX5_QP_OPTPAR_ALT_ADDR_PATH | + MLX5_QP_OPTPAR_RWE | + MLX5_QP_OPTPAR_PKEY_INDEX, + [MLX5_QP_ST_UD] = MLX5_QP_OPTPAR_PKEY_INDEX | + MLX5_QP_OPTPAR_Q_KEY, + [MLX5_QP_ST_MLX] = MLX5_QP_OPTPAR_PKEY_INDEX | + MLX5_QP_OPTPAR_Q_KEY, + }, + }, + [MLX5_QP_STATE_RTR] = { + [MLX5_QP_STATE_RTS] = { + [MLX5_QP_ST_RC] = MLX5_QP_OPTPAR_ALT_ADDR_PATH | + MLX5_QP_OPTPAR_RRE | + MLX5_QP_OPTPAR_RAE | + MLX5_QP_OPTPAR_RWE | + MLX5_QP_OPTPAR_PM_STATE | + MLX5_QP_OPTPAR_RNR_TIMEOUT, + [MLX5_QP_ST_UC] = MLX5_QP_OPTPAR_ALT_ADDR_PATH | + MLX5_QP_OPTPAR_RWE | + MLX5_QP_OPTPAR_PM_STATE, + [MLX5_QP_ST_UD] = MLX5_QP_OPTPAR_Q_KEY, + }, + }, + [MLX5_QP_STATE_RTS] = { + [MLX5_QP_STATE_RTS] = { + [MLX5_QP_ST_RC] = MLX5_QP_OPTPAR_RRE | + MLX5_QP_OPTPAR_RAE | + MLX5_QP_OPTPAR_RWE | + MLX5_QP_OPTPAR_RNR_TIMEOUT | + MLX5_QP_OPTPAR_PM_STATE, + [MLX5_QP_ST_UC] = MLX5_QP_OPTPAR_RWE | + MLX5_QP_OPTPAR_PM_STATE, + [MLX5_QP_ST_UD] = MLX5_QP_OPTPAR_Q_KEY | + MLX5_QP_OPTPAR_SRQN | + MLX5_QP_OPTPAR_CQN_RCV, + }, + }, + [MLX5_QP_STATE_SQER] = { + [MLX5_QP_STATE_RTS] = { + [MLX5_QP_ST_UD] = MLX5_QP_OPTPAR_Q_KEY, + [MLX5_QP_ST_MLX] = MLX5_QP_OPTPAR_Q_KEY, + }, + }, +}; + +static int ib_nr_to_mlx5_nr(int ib_mask) +{ + switch (ib_mask) { + case IB_QP_STATE: + return 0; + case IB_QP_CUR_STATE: + return 0; + case IB_QP_EN_SQD_ASYNC_NOTIFY: + return 0; + case IB_QP_ACCESS_FLAGS: + return MLX5_QP_OPTPAR_RWE | MLX5_QP_OPTPAR_RRE | + MLX5_QP_OPTPAR_RAE; + case IB_QP_PKEY_INDEX: + return MLX5_QP_OPTPAR_PKEY_INDEX; + case IB_QP_PORT: + return MLX5_QP_OPTPAR_PRI_PORT; + case IB_QP_QKEY: + return MLX5_QP_OPTPAR_Q_KEY; + case IB_QP_AV: + return MLX5_QP_OPTPAR_PRIMARY_ADDR_PATH | + MLX5_QP_OPTPAR_PRI_PORT; + case IB_QP_PATH_MTU: + return 0; + case IB_QP_TIMEOUT: + return MLX5_QP_OPTPAR_ACK_TIMEOUT; + case IB_QP_RETRY_CNT: + return MLX5_QP_OPTPAR_RETRY_COUNT; + case IB_QP_RNR_RETRY: + return MLX5_QP_OPTPAR_RNR_RETRY; + case IB_QP_RQ_PSN: + return 0; + case IB_QP_MAX_QP_RD_ATOMIC: + return MLX5_QP_OPTPAR_SRA_MAX; + case IB_QP_ALT_PATH: + return MLX5_QP_OPTPAR_ALT_ADDR_PATH; + case IB_QP_MIN_RNR_TIMER: + return MLX5_QP_OPTPAR_RNR_TIMEOUT; + case IB_QP_SQ_PSN: + return 0; + case IB_QP_MAX_DEST_RD_ATOMIC: + return MLX5_QP_OPTPAR_RRA_MAX | MLX5_QP_OPTPAR_RWE | + MLX5_QP_OPTPAR_RRE | MLX5_QP_OPTPAR_RAE; + case IB_QP_PATH_MIG_STATE: + return MLX5_QP_OPTPAR_PM_STATE; + case IB_QP_CAP: + return 0; + case IB_QP_DEST_QPN: + return 0; + } + return 0; +} + +static int ib_mask_to_mlx5_opt(int ib_mask) +{ + int result = 0; + int i; + + for (i = 0; i < 8 * sizeof(int); i++) { + if ((1 << i) & ib_mask) + result |= ib_nr_to_mlx5_nr(1 << i); + } + + return result; +} + +static int __mlx5_ib_modify_qp(struct ib_qp *ibqp, + const struct ib_qp_attr *attr, int attr_mask, + enum ib_qp_state cur_state, enum ib_qp_state new_state) +{ + struct mlx5_ib_dev *dev = to_mdev(ibqp->device); + struct mlx5_ib_qp *qp = to_mqp(ibqp); + struct mlx5_ib_cq *send_cq, *recv_cq; + struct mlx5_qp_context *context; + struct mlx5_modify_qp_mbox_in *in; + struct mlx5_ib_pd *pd; + enum mlx5_qp_state mlx5_cur, mlx5_new; + enum mlx5_qp_optpar optpar; + int sqd_event; + int mlx5_st; + int err; + + in = kzalloc(sizeof(*in), GFP_KERNEL); + if (!in) + return -ENOMEM; + + context = &in->ctx; + err = to_mlx5_st(ibqp->qp_type); + if (err < 0) + goto out; + + context->flags = cpu_to_be32(err << 16); + + if (!(attr_mask & IB_QP_PATH_MIG_STATE)) { + context->flags |= cpu_to_be32(MLX5_QP_PM_MIGRATED << 11); + } else { + switch (attr->path_mig_state) { + case IB_MIG_MIGRATED: + context->flags |= cpu_to_be32(MLX5_QP_PM_MIGRATED << 11); + break; + case IB_MIG_REARM: + context->flags |= cpu_to_be32(MLX5_QP_PM_REARM << 11); + break; + case IB_MIG_ARMED: + context->flags |= cpu_to_be32(MLX5_QP_PM_ARMED << 11); + break; + } + } + + if (ibqp->qp_type == IB_QPT_GSI || ibqp->qp_type == IB_QPT_SMI) { + context->mtu_msgmax = (IB_MTU_256 << 5) | 8; + } else if (ibqp->qp_type == IB_QPT_UD || + ibqp->qp_type == MLX5_IB_QPT_REG_UMR) { + context->mtu_msgmax = (IB_MTU_4096 << 5) | 12; + } else if (attr_mask & IB_QP_PATH_MTU) { + if (attr->path_mtu < IB_MTU_256 || + attr->path_mtu > IB_MTU_4096) { + mlx5_ib_warn(dev, "invalid mtu %d\n", attr->path_mtu); + err = -EINVAL; + goto out; + } + context->mtu_msgmax = (attr->path_mtu << 5) | dev->mdev.caps.log_max_msg; + } + + if (attr_mask & IB_QP_DEST_QPN) + context->log_pg_sz_remote_qpn = cpu_to_be32(attr->dest_qp_num); + + if (attr_mask & IB_QP_PKEY_INDEX) + context->pri_path.pkey_index = attr->pkey_index; + + /* todo implement counter_index functionality */ + + if (is_sqp(ibqp->qp_type)) + context->pri_path.port = qp->port; + + if (attr_mask & IB_QP_PORT) + context->pri_path.port = attr->port_num; + + if (attr_mask & IB_QP_AV) { + err = mlx5_set_path(dev, &attr->ah_attr, &context->pri_path, + attr_mask & IB_QP_PORT ? attr->port_num : qp->port, + attr_mask, 0, attr); + if (err) + goto out; + } + + if (attr_mask & IB_QP_TIMEOUT) + context->pri_path.ackto_lt |= attr->timeout << 3; + + if (attr_mask & IB_QP_ALT_PATH) { + err = mlx5_set_path(dev, &attr->alt_ah_attr, &context->alt_path, + attr->alt_port_num, attr_mask, 0, attr); + if (err) + goto out; + } + + pd = get_pd(qp); + get_cqs(qp, &send_cq, &recv_cq); + + context->flags_pd = cpu_to_be32(pd ? pd->pdn : to_mpd(dev->devr.p0)->pdn); + context->cqn_send = send_cq ? cpu_to_be32(send_cq->mcq.cqn) : 0; + context->cqn_recv = recv_cq ? cpu_to_be32(recv_cq->mcq.cqn) : 0; + context->params1 = cpu_to_be32(MLX5_IB_ACK_REQ_FREQ << 28); + + if (attr_mask & IB_QP_RNR_RETRY) + context->params1 |= cpu_to_be32(attr->rnr_retry << 13); + + if (attr_mask & IB_QP_RETRY_CNT) + context->params1 |= cpu_to_be32(attr->retry_cnt << 16); + + if (attr_mask & IB_QP_MAX_QP_RD_ATOMIC) { + if (attr->max_rd_atomic) + context->params1 |= + cpu_to_be32(fls(attr->max_rd_atomic - 1) << 21); + } + + if (attr_mask & IB_QP_SQ_PSN) + context->next_send_psn = cpu_to_be32(attr->sq_psn); + + if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC) { + if (attr->max_dest_rd_atomic) + context->params2 |= + cpu_to_be32(fls(attr->max_dest_rd_atomic - 1) << 21); + } + + if (attr_mask & (IB_QP_ACCESS_FLAGS | IB_QP_MAX_DEST_RD_ATOMIC)) + context->params2 |= to_mlx5_access_flags(qp, attr, attr_mask); + + if (attr_mask & IB_QP_MIN_RNR_TIMER) + context->rnr_nextrecvpsn |= cpu_to_be32(attr->min_rnr_timer << 24); + + if (attr_mask & IB_QP_RQ_PSN) + context->rnr_nextrecvpsn |= cpu_to_be32(attr->rq_psn); + + if (attr_mask & IB_QP_QKEY) + context->qkey = cpu_to_be32(attr->qkey); + + if (qp->rq.wqe_cnt && cur_state == IB_QPS_RESET && new_state == IB_QPS_INIT) + context->db_rec_addr = cpu_to_be64(qp->db.dma); + + if (cur_state == IB_QPS_RTS && new_state == IB_QPS_SQD && + attr_mask & IB_QP_EN_SQD_ASYNC_NOTIFY && attr->en_sqd_async_notify) + sqd_event = 1; + else + sqd_event = 0; + + if (!ibqp->uobject && cur_state == IB_QPS_RESET && new_state == IB_QPS_INIT) + context->sq_crq_size |= cpu_to_be16(1 << 4); + + + mlx5_cur = to_mlx5_state(cur_state); + mlx5_new = to_mlx5_state(new_state); + mlx5_st = to_mlx5_st(ibqp->qp_type); + if (mlx5_cur < 0 || mlx5_new < 0 || mlx5_st < 0) + goto out; + + optpar = ib_mask_to_mlx5_opt(attr_mask); + optpar &= opt_mask[mlx5_cur][mlx5_new][mlx5_st]; + in->optparam = cpu_to_be32(optpar); + err = mlx5_core_qp_modify(&dev->mdev, to_mlx5_state(cur_state), + to_mlx5_state(new_state), in, sqd_event, + &qp->mqp); + if (err) + goto out; + + qp->state = new_state; + + if (attr_mask & IB_QP_ACCESS_FLAGS) + qp->atomic_rd_en = attr->qp_access_flags; + if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC) + qp->resp_depth = attr->max_dest_rd_atomic; + if (attr_mask & IB_QP_PORT) + qp->port = attr->port_num; + if (attr_mask & IB_QP_ALT_PATH) + qp->alt_port = attr->alt_port_num; + + /* + * If we moved a kernel QP to RESET, clean up all old CQ + * entries and reinitialize the QP. + */ + if (new_state == IB_QPS_RESET && !ibqp->uobject) { + mlx5_ib_cq_clean(recv_cq, qp->mqp.qpn, + ibqp->srq ? to_msrq(ibqp->srq) : NULL); + if (send_cq != recv_cq) + mlx5_ib_cq_clean(send_cq, qp->mqp.qpn, NULL); + + qp->rq.head = 0; + qp->rq.tail = 0; + qp->sq.head = 0; + qp->sq.tail = 0; + qp->sq.cur_post = 0; + qp->sq.last_poll = 0; + qp->db.db[MLX5_RCV_DBR] = 0; + qp->db.db[MLX5_SND_DBR] = 0; + } + +out: + kfree(in); + return err; +} + +int mlx5_ib_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, + int attr_mask, struct ib_udata *udata) +{ + struct mlx5_ib_dev *dev = to_mdev(ibqp->device); + struct mlx5_ib_qp *qp = to_mqp(ibqp); + enum ib_qp_state cur_state, new_state; + int err = -EINVAL; + int port; + + mutex_lock(&qp->mutex); + + cur_state = attr_mask & IB_QP_CUR_STATE ? attr->cur_qp_state : qp->state; + new_state = attr_mask & IB_QP_STATE ? attr->qp_state : cur_state; + + if (ibqp->qp_type != MLX5_IB_QPT_REG_UMR && + !ib_modify_qp_is_ok(cur_state, new_state, ibqp->qp_type, attr_mask)) + goto out; + + if ((attr_mask & IB_QP_PORT) && + (attr->port_num == 0 || attr->port_num > dev->mdev.caps.num_ports)) + goto out; + + if (attr_mask & IB_QP_PKEY_INDEX) { + port = attr_mask & IB_QP_PORT ? attr->port_num : qp->port; + if (attr->pkey_index >= dev->mdev.caps.port[port - 1].pkey_table_len) + goto out; + } + + if (attr_mask & IB_QP_MAX_QP_RD_ATOMIC && + attr->max_rd_atomic > dev->mdev.caps.max_ra_res_qp) + goto out; + + if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC && + attr->max_dest_rd_atomic > dev->mdev.caps.max_ra_req_qp) + goto out; + + if (cur_state == new_state && cur_state == IB_QPS_RESET) { + err = 0; + goto out; + } + + err = __mlx5_ib_modify_qp(ibqp, attr, attr_mask, cur_state, new_state); + +out: + mutex_unlock(&qp->mutex); + return err; +} + +static int mlx5_wq_overflow(struct mlx5_ib_wq *wq, int nreq, struct ib_cq *ib_cq) +{ + struct mlx5_ib_cq *cq; + unsigned cur; + + cur = wq->head - wq->tail; + if (likely(cur + nreq < wq->max_post)) + return 0; + + cq = to_mcq(ib_cq); + spin_lock(&cq->lock); + cur = wq->head - wq->tail; + spin_unlock(&cq->lock); + + return cur + nreq >= wq->max_post; +} + +static __always_inline void set_raddr_seg(struct mlx5_wqe_raddr_seg *rseg, + u64 remote_addr, u32 rkey) +{ + rseg->raddr = cpu_to_be64(remote_addr); + rseg->rkey = cpu_to_be32(rkey); + rseg->reserved = 0; +} + +static void set_atomic_seg(struct mlx5_wqe_atomic_seg *aseg, struct ib_send_wr *wr) +{ + if (wr->opcode == IB_WR_ATOMIC_CMP_AND_SWP) { + aseg->swap_add = cpu_to_be64(wr->wr.atomic.swap); + aseg->compare = cpu_to_be64(wr->wr.atomic.compare_add); + } else if (wr->opcode == IB_WR_MASKED_ATOMIC_FETCH_AND_ADD) { + aseg->swap_add = cpu_to_be64(wr->wr.atomic.compare_add); + aseg->compare = cpu_to_be64(wr->wr.atomic.compare_add_mask); + } else { + aseg->swap_add = cpu_to_be64(wr->wr.atomic.compare_add); + aseg->compare = 0; + } +} + +static void set_masked_atomic_seg(struct mlx5_wqe_masked_atomic_seg *aseg, + struct ib_send_wr *wr) +{ + aseg->swap_add = cpu_to_be64(wr->wr.atomic.swap); + aseg->swap_add_mask = cpu_to_be64(wr->wr.atomic.swap_mask); + aseg->compare = cpu_to_be64(wr->wr.atomic.compare_add); + aseg->compare_mask = cpu_to_be64(wr->wr.atomic.compare_add_mask); +} + +static void set_datagram_seg(struct mlx5_wqe_datagram_seg *dseg, + struct ib_send_wr *wr) +{ + memcpy(&dseg->av, &to_mah(wr->wr.ud.ah)->av, sizeof(struct mlx5_av)); + dseg->av.dqp_dct = cpu_to_be32(wr->wr.ud.remote_qpn | MLX5_EXTENDED_UD_AV); + dseg->av.key.qkey.qkey = cpu_to_be32(wr->wr.ud.remote_qkey); +} + +static void set_data_ptr_seg(struct mlx5_wqe_data_seg *dseg, struct ib_sge *sg) +{ + dseg->byte_count = cpu_to_be32(sg->length); + dseg->lkey = cpu_to_be32(sg->lkey); + dseg->addr = cpu_to_be64(sg->addr); +} + +static __be16 get_klm_octo(int npages) +{ + return cpu_to_be16(ALIGN(npages, 8) / 2); +} + +static __be64 frwr_mkey_mask(void) +{ + u64 result; + + result = MLX5_MKEY_MASK_LEN | + MLX5_MKEY_MASK_PAGE_SIZE | + MLX5_MKEY_MASK_START_ADDR | + MLX5_MKEY_MASK_EN_RINVAL | + MLX5_MKEY_MASK_KEY | + MLX5_MKEY_MASK_LR | + MLX5_MKEY_MASK_LW | + MLX5_MKEY_MASK_RR | + MLX5_MKEY_MASK_RW | + MLX5_MKEY_MASK_A | + MLX5_MKEY_MASK_SMALL_FENCE | + MLX5_MKEY_MASK_FREE; + + return cpu_to_be64(result); +} + +static void set_frwr_umr_segment(struct mlx5_wqe_umr_ctrl_seg *umr, + struct ib_send_wr *wr, int li) +{ + memset(umr, 0, sizeof(*umr)); + + if (li) { + umr->mkey_mask = cpu_to_be64(MLX5_MKEY_MASK_FREE); + umr->flags = 1 << 7; + return; + } + + umr->flags = (1 << 5); /* fail if not free */ + umr->klm_octowords = get_klm_octo(wr->wr.fast_reg.page_list_len); + umr->mkey_mask = frwr_mkey_mask(); +} + +static void set_reg_umr_segment(struct mlx5_wqe_umr_ctrl_seg *umr, + struct ib_send_wr *wr) +{ + struct umr_wr *umrwr = (struct umr_wr *)&wr->wr.fast_reg; + u64 mask; + + memset(umr, 0, sizeof(*umr)); + + if (!(wr->send_flags & MLX5_IB_SEND_UMR_UNREG)) { + umr->flags = 1 << 5; /* fail if not free */ + umr->klm_octowords = get_klm_octo(umrwr->npages); + mask = MLX5_MKEY_MASK_LEN | + MLX5_MKEY_MASK_PAGE_SIZE | + MLX5_MKEY_MASK_START_ADDR | + MLX5_MKEY_MASK_PD | + MLX5_MKEY_MASK_LR | + MLX5_MKEY_MASK_LW | + MLX5_MKEY_MASK_RR | + MLX5_MKEY_MASK_RW | + MLX5_MKEY_MASK_A | + MLX5_MKEY_MASK_FREE; + umr->mkey_mask = cpu_to_be64(mask); + } else { + umr->flags = 2 << 5; /* fail if free */ + mask = MLX5_MKEY_MASK_FREE; + umr->mkey_mask = cpu_to_be64(mask); + } + + if (!wr->num_sge) + umr->flags |= (1 << 7); /* inline */ +} + +static u8 get_umr_flags(int acc) +{ + return (acc & IB_ACCESS_REMOTE_ATOMIC ? MLX5_PERM_ATOMIC : 0) | + (acc & IB_ACCESS_REMOTE_WRITE ? MLX5_PERM_REMOTE_WRITE : 0) | + (acc & IB_ACCESS_REMOTE_READ ? MLX5_PERM_REMOTE_READ : 0) | + (acc & IB_ACCESS_LOCAL_WRITE ? MLX5_PERM_LOCAL_WRITE : 0) | + MLX5_PERM_LOCAL_READ | MLX5_PERM_UMR_EN | MLX5_ACCESS_MODE_MTT; +} + +static void set_mkey_segment(struct mlx5_mkey_seg *seg, struct ib_send_wr *wr, + int li, int *writ) +{ + memset(seg, 0, sizeof(*seg)); + if (li) { + seg->status = 1 << 6; + return; + } + + seg->flags = get_umr_flags(wr->wr.fast_reg.access_flags); + *writ = seg->flags & (MLX5_PERM_LOCAL_WRITE | IB_ACCESS_REMOTE_WRITE); + seg->qpn_mkey7_0 = cpu_to_be32((wr->wr.fast_reg.rkey & 0xff) | 0xffffff00); + seg->flags_pd = cpu_to_be32(MLX5_MKEY_REMOTE_INVAL); + seg->start_addr = cpu_to_be64(wr->wr.fast_reg.iova_start); + seg->len = cpu_to_be64(wr->wr.fast_reg.length); + seg->xlt_oct_size = cpu_to_be32((wr->wr.fast_reg.page_list_len + 1) / 2); + seg->log2_page_size = wr->wr.fast_reg.page_shift; +} + +static void set_reg_mkey_segment(struct mlx5_mkey_seg *seg, struct ib_send_wr *wr) +{ + memset(seg, 0, sizeof(*seg)); + if (wr->send_flags & MLX5_IB_SEND_UMR_UNREG) { + seg->status = 1 << 6; + return; + } + + seg->flags = convert_access(wr->wr.fast_reg.access_flags); + seg->flags_pd = cpu_to_be32(to_mpd((struct ib_pd *)wr->wr.fast_reg.page_list)->pdn); + seg->start_addr = cpu_to_be64(wr->wr.fast_reg.iova_start); + seg->len = cpu_to_be64(wr->wr.fast_reg.length); + seg->log2_page_size = wr->wr.fast_reg.page_shift; + seg->qpn_mkey7_0 = cpu_to_be32(0xffffff << 8); +} + +static void set_frwr_pages(struct mlx5_wqe_data_seg *dseg, + struct ib_send_wr *wr, + struct mlx5_core_dev *mdev, + struct mlx5_ib_pd *pd, + int writ) +{ + struct mlx5_ib_fast_reg_page_list *mfrpl = to_mfrpl(wr->wr.fast_reg.page_list); + u64 *page_list = wr->wr.fast_reg.page_list->page_list; + u64 perm = MLX5_EN_RD | (writ ? MLX5_EN_WR : 0); + int i; + + for (i = 0; i < wr->wr.fast_reg.page_list_len; i++) + mfrpl->mapped_page_list[i] = cpu_to_be64(page_list[i] | perm); + dseg->addr = cpu_to_be64(mfrpl->map); + dseg->byte_count = cpu_to_be32(ALIGN(sizeof(u64) * wr->wr.fast_reg.page_list_len, 64)); + dseg->lkey = cpu_to_be32(pd->pa_lkey); +} + +static __be32 send_ieth(struct ib_send_wr *wr) +{ + switch (wr->opcode) { + case IB_WR_SEND_WITH_IMM: + case IB_WR_RDMA_WRITE_WITH_IMM: + return wr->ex.imm_data; + + case IB_WR_SEND_WITH_INV: + return cpu_to_be32(wr->ex.invalidate_rkey); + + default: + return 0; + } +} + +static u8 calc_sig(void *wqe, int size) +{ + u8 *p = wqe; + u8 res = 0; + int i; + + for (i = 0; i < size; i++) + res ^= p[i]; + + return ~res; +} + +static u8 wq_sig(void *wqe) +{ + return calc_sig(wqe, (*((u8 *)wqe + 8) & 0x3f) << 4); +} + +static int set_data_inl_seg(struct mlx5_ib_qp *qp, struct ib_send_wr *wr, + void *wqe, int *sz) +{ + struct mlx5_wqe_inline_seg *seg; + void *qend = qp->sq.qend; + void *addr; + int inl = 0; + int copy; + int len; + int i; + + seg = wqe; + wqe += sizeof(*seg); + for (i = 0; i < wr->num_sge; i++) { + addr = (void *)(unsigned long)(wr->sg_list[i].addr); + len = wr->sg_list[i].length; + inl += len; + + if (unlikely(inl > qp->max_inline_data)) + return -ENOMEM; + + if (unlikely(wqe + len > qend)) { + copy = qend - wqe; + memcpy(wqe, addr, copy); + addr += copy; + len -= copy; + wqe = mlx5_get_send_wqe(qp, 0); + } + memcpy(wqe, addr, len); + wqe += len; + } + + seg->byte_count = cpu_to_be32(inl | MLX5_INLINE_SEG); + + *sz = ALIGN(inl + sizeof(seg->byte_count), 16) / 16; + + return 0; +} + +static int set_frwr_li_wr(void **seg, struct ib_send_wr *wr, int *size, + struct mlx5_core_dev *mdev, struct mlx5_ib_pd *pd, struct mlx5_ib_qp *qp) +{ + int writ = 0; + int li; + + li = wr->opcode == IB_WR_LOCAL_INV ? 1 : 0; + if (unlikely(wr->send_flags & IB_SEND_INLINE)) + return -EINVAL; + + set_frwr_umr_segment(*seg, wr, li); + *seg += sizeof(struct mlx5_wqe_umr_ctrl_seg); + *size += sizeof(struct mlx5_wqe_umr_ctrl_seg) / 16; + if (unlikely((*seg == qp->sq.qend))) + *seg = mlx5_get_send_wqe(qp, 0); + set_mkey_segment(*seg, wr, li, &writ); + *seg += sizeof(struct mlx5_mkey_seg); + *size += sizeof(struct mlx5_mkey_seg) / 16; + if (unlikely((*seg == qp->sq.qend))) + *seg = mlx5_get_send_wqe(qp, 0); + if (!li) { + set_frwr_pages(*seg, wr, mdev, pd, writ); + *seg += sizeof(struct mlx5_wqe_data_seg); + *size += (sizeof(struct mlx5_wqe_data_seg) / 16); + } + return 0; +} + +static void dump_wqe(struct mlx5_ib_qp *qp, int idx, int size_16) +{ + __be32 *p = NULL; + int tidx = idx; + int i, j; + + pr_debug("dump wqe at %p\n", mlx5_get_send_wqe(qp, tidx)); + for (i = 0, j = 0; i < size_16 * 4; i += 4, j += 4) { + if ((i & 0xf) == 0) { + void *buf = mlx5_get_send_wqe(qp, tidx); + tidx = (tidx + 1) & (qp->sq.wqe_cnt - 1); + p = buf; + j = 0; + } + pr_debug("%08x %08x %08x %08x\n", be32_to_cpu(p[j]), + be32_to_cpu(p[j + 1]), be32_to_cpu(p[j + 2]), + be32_to_cpu(p[j + 3])); + } +} + +static void mlx5_bf_copy(u64 __iomem *dst, u64 *src, + unsigned bytecnt, struct mlx5_ib_qp *qp) +{ + while (bytecnt > 0) { + __iowrite64_copy(dst++, src++, 8); + __iowrite64_copy(dst++, src++, 8); + __iowrite64_copy(dst++, src++, 8); + __iowrite64_copy(dst++, src++, 8); + __iowrite64_copy(dst++, src++, 8); + __iowrite64_copy(dst++, src++, 8); + __iowrite64_copy(dst++, src++, 8); + __iowrite64_copy(dst++, src++, 8); + bytecnt -= 64; + if (unlikely(src == qp->sq.qend)) + src = mlx5_get_send_wqe(qp, 0); + } +} + +static u8 get_fence(u8 fence, struct ib_send_wr *wr) +{ + if (unlikely(wr->opcode == IB_WR_LOCAL_INV && + wr->send_flags & IB_SEND_FENCE)) + return MLX5_FENCE_MODE_STRONG_ORDERING; + + if (unlikely(fence)) { + if (wr->send_flags & IB_SEND_FENCE) + return MLX5_FENCE_MODE_SMALL_AND_FENCE; + else + return fence; + + } else { + return 0; + } +} + +int mlx5_ib_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr, + struct ib_send_wr **bad_wr) +{ + struct mlx5_wqe_ctrl_seg *ctrl = NULL; /* compiler warning */ + struct mlx5_ib_dev *dev = to_mdev(ibqp->device); + struct mlx5_core_dev *mdev = &dev->mdev; + struct mlx5_ib_qp *qp = to_mqp(ibqp); + struct mlx5_wqe_data_seg *dpseg; + struct mlx5_wqe_xrc_seg *xrc; + struct mlx5_bf *bf = qp->bf; + int uninitialized_var(size); + void *qend = qp->sq.qend; + unsigned long flags; + u32 mlx5_opcode; + unsigned idx; + int err = 0; + int inl = 0; + int num_sge; + void *seg; + int nreq; + int i; + u8 next_fence = 0; + u8 opmod = 0; + u8 fence; + + spin_lock_irqsave(&qp->sq.lock, flags); + + for (nreq = 0; wr; nreq++, wr = wr->next) { + if (unlikely(wr->opcode >= sizeof(mlx5_ib_opcode) / sizeof(mlx5_ib_opcode[0]))) { + mlx5_ib_warn(dev, "\n"); + err = -EINVAL; + *bad_wr = wr; + goto out; + } + + if (unlikely(mlx5_wq_overflow(&qp->sq, nreq, qp->ibqp.send_cq))) { + mlx5_ib_warn(dev, "\n"); + err = -ENOMEM; + *bad_wr = wr; + goto out; + } + + fence = qp->fm_cache; + num_sge = wr->num_sge; + if (unlikely(num_sge > qp->sq.max_gs)) { + mlx5_ib_warn(dev, "\n"); + err = -ENOMEM; + *bad_wr = wr; + goto out; + } + + idx = qp->sq.cur_post & (qp->sq.wqe_cnt - 1); + seg = mlx5_get_send_wqe(qp, idx); + ctrl = seg; + *(uint32_t *)(seg + 8) = 0; + ctrl->imm = send_ieth(wr); + ctrl->fm_ce_se = qp->sq_signal_bits | + (wr->send_flags & IB_SEND_SIGNALED ? + MLX5_WQE_CTRL_CQ_UPDATE : 0) | + (wr->send_flags & IB_SEND_SOLICITED ? + MLX5_WQE_CTRL_SOLICITED : 0); + + seg += sizeof(*ctrl); + size = sizeof(*ctrl) / 16; + + switch (ibqp->qp_type) { + case IB_QPT_XRC_INI: + xrc = seg; + xrc->xrc_srqn = htonl(wr->xrc_remote_srq_num); + seg += sizeof(*xrc); + size += sizeof(*xrc) / 16; + /* fall through */ + case IB_QPT_RC: + switch (wr->opcode) { + case IB_WR_RDMA_READ: + case IB_WR_RDMA_WRITE: + case IB_WR_RDMA_WRITE_WITH_IMM: + set_raddr_seg(seg, wr->wr.rdma.remote_addr, + wr->wr.rdma.rkey); + seg += sizeof(struct mlx5_wqe_raddr_seg); + size += sizeof(struct mlx5_wqe_raddr_seg) / 16; + break; + + case IB_WR_ATOMIC_CMP_AND_SWP: + case IB_WR_ATOMIC_FETCH_AND_ADD: + set_raddr_seg(seg, wr->wr.atomic.remote_addr, + wr->wr.atomic.rkey); + seg += sizeof(struct mlx5_wqe_raddr_seg); + + set_atomic_seg(seg, wr); + seg += sizeof(struct mlx5_wqe_atomic_seg); + + size += (sizeof(struct mlx5_wqe_raddr_seg) + + sizeof(struct mlx5_wqe_atomic_seg)) / 16; + break; + + case IB_WR_MASKED_ATOMIC_CMP_AND_SWP: + set_raddr_seg(seg, wr->wr.atomic.remote_addr, + wr->wr.atomic.rkey); + seg += sizeof(struct mlx5_wqe_raddr_seg); + + set_masked_atomic_seg(seg, wr); + seg += sizeof(struct mlx5_wqe_masked_atomic_seg); + + size += (sizeof(struct mlx5_wqe_raddr_seg) + + sizeof(struct mlx5_wqe_masked_atomic_seg)) / 16; + break; + + case IB_WR_LOCAL_INV: + next_fence = MLX5_FENCE_MODE_INITIATOR_SMALL; + qp->sq.wr_data[idx] = IB_WR_LOCAL_INV; + ctrl->imm = cpu_to_be32(wr->ex.invalidate_rkey); + err = set_frwr_li_wr(&seg, wr, &size, mdev, to_mpd(ibqp->pd), qp); + if (err) { + mlx5_ib_warn(dev, "\n"); + *bad_wr = wr; + goto out; + } + num_sge = 0; + break; + + case IB_WR_FAST_REG_MR: + next_fence = MLX5_FENCE_MODE_INITIATOR_SMALL; + qp->sq.wr_data[idx] = IB_WR_FAST_REG_MR; + ctrl->imm = cpu_to_be32(wr->wr.fast_reg.rkey); + err = set_frwr_li_wr(&seg, wr, &size, mdev, to_mpd(ibqp->pd), qp); + if (err) { + mlx5_ib_warn(dev, "\n"); + *bad_wr = wr; + goto out; + } + num_sge = 0; + break; + + default: + break; + } + break; + + case IB_QPT_UC: + switch (wr->opcode) { + case IB_WR_RDMA_WRITE: + case IB_WR_RDMA_WRITE_WITH_IMM: + set_raddr_seg(seg, wr->wr.rdma.remote_addr, + wr->wr.rdma.rkey); + seg += sizeof(struct mlx5_wqe_raddr_seg); + size += sizeof(struct mlx5_wqe_raddr_seg) / 16; + break; + + default: + break; + } + break; + + case IB_QPT_UD: + case IB_QPT_SMI: + case IB_QPT_GSI: + set_datagram_seg(seg, wr); + seg += sizeof(struct mlx5_wqe_datagram_seg); + size += sizeof(struct mlx5_wqe_datagram_seg) / 16; + if (unlikely((seg == qend))) + seg = mlx5_get_send_wqe(qp, 0); + break; + + case MLX5_IB_QPT_REG_UMR: + if (wr->opcode != MLX5_IB_WR_UMR) { + err = -EINVAL; + mlx5_ib_warn(dev, "bad opcode\n"); + goto out; + } + qp->sq.wr_data[idx] = MLX5_IB_WR_UMR; + ctrl->imm = cpu_to_be32(wr->wr.fast_reg.rkey); + set_reg_umr_segment(seg, wr); + seg += sizeof(struct mlx5_wqe_umr_ctrl_seg); + size += sizeof(struct mlx5_wqe_umr_ctrl_seg) / 16; + if (unlikely((seg == qend))) + seg = mlx5_get_send_wqe(qp, 0); + set_reg_mkey_segment(seg, wr); + seg += sizeof(struct mlx5_mkey_seg); + size += sizeof(struct mlx5_mkey_seg) / 16; + if (unlikely((seg == qend))) + seg = mlx5_get_send_wqe(qp, 0); + break; + + default: + break; + } + + if (wr->send_flags & IB_SEND_INLINE && num_sge) { + int uninitialized_var(sz); + + err = set_data_inl_seg(qp, wr, seg, &sz); + if (unlikely(err)) { + mlx5_ib_warn(dev, "\n"); + *bad_wr = wr; + goto out; + } + inl = 1; + size += sz; + } else { + dpseg = seg; + for (i = 0; i < num_sge; i++) { + if (unlikely(dpseg == qend)) { + seg = mlx5_get_send_wqe(qp, 0); + dpseg = seg; + } + if (likely(wr->sg_list[i].length)) { + set_data_ptr_seg(dpseg, wr->sg_list + i); + size += sizeof(struct mlx5_wqe_data_seg) / 16; + dpseg++; + } + } + } + + mlx5_opcode = mlx5_ib_opcode[wr->opcode]; + ctrl->opmod_idx_opcode = cpu_to_be32(((u32)(qp->sq.cur_post) << 8) | + mlx5_opcode | + ((u32)opmod << 24)); + ctrl->qpn_ds = cpu_to_be32(size | (qp->mqp.qpn << 8)); + ctrl->fm_ce_se |= get_fence(fence, wr); + qp->fm_cache = next_fence; + if (unlikely(qp->wq_sig)) + ctrl->signature = wq_sig(ctrl); + + qp->sq.wrid[idx] = wr->wr_id; + qp->sq.w_list[idx].opcode = mlx5_opcode; + qp->sq.wqe_head[idx] = qp->sq.head + nreq; + qp->sq.cur_post += DIV_ROUND_UP(size * 16, MLX5_SEND_WQE_BB); + qp->sq.w_list[idx].next = qp->sq.cur_post; + + if (0) + dump_wqe(qp, idx, size); + } + +out: + if (likely(nreq)) { + qp->sq.head += nreq; + + /* Make sure that descriptors are written before + * updating doorbell record and ringing the doorbell + */ + wmb(); + + qp->db.db[MLX5_SND_DBR] = cpu_to_be32(qp->sq.cur_post); + + if (bf->need_lock) + spin_lock(&bf->lock); + + /* TBD enable WC */ + if (0 && nreq == 1 && bf->uuarn && inl && size > 1 && size <= bf->buf_size / 16) { + mlx5_bf_copy(bf->reg + bf->offset, (u64 *)ctrl, ALIGN(size * 16, 64), qp); + /* wc_wmb(); */ + } else { + mlx5_write64((__be32 *)ctrl, bf->regreg + bf->offset, + MLX5_GET_DOORBELL_LOCK(&bf->lock32)); + /* Make sure doorbells don't leak out of SQ spinlock + * and reach the HCA out of order. + */ + mmiowb(); + } + bf->offset ^= bf->buf_size; + if (bf->need_lock) + spin_unlock(&bf->lock); + } + + spin_unlock_irqrestore(&qp->sq.lock, flags); + + return err; +} + +static void set_sig_seg(struct mlx5_rwqe_sig *sig, int size) +{ + sig->signature = calc_sig(sig, size); +} + +int mlx5_ib_post_recv(struct ib_qp *ibqp, struct ib_recv_wr *wr, + struct ib_recv_wr **bad_wr) +{ + struct mlx5_ib_qp *qp = to_mqp(ibqp); + struct mlx5_wqe_data_seg *scat; + struct mlx5_rwqe_sig *sig; + unsigned long flags; + int err = 0; + int nreq; + int ind; + int i; + + spin_lock_irqsave(&qp->rq.lock, flags); + + ind = qp->rq.head & (qp->rq.wqe_cnt - 1); + + for (nreq = 0; wr; nreq++, wr = wr->next) { + if (mlx5_wq_overflow(&qp->rq, nreq, qp->ibqp.recv_cq)) { + err = -ENOMEM; + *bad_wr = wr; + goto out; + } + + if (unlikely(wr->num_sge > qp->rq.max_gs)) { + err = -EINVAL; + *bad_wr = wr; + goto out; + } + + scat = get_recv_wqe(qp, ind); + if (qp->wq_sig) + scat++; + + for (i = 0; i < wr->num_sge; i++) + set_data_ptr_seg(scat + i, wr->sg_list + i); + + if (i < qp->rq.max_gs) { + scat[i].byte_count = 0; + scat[i].lkey = cpu_to_be32(MLX5_INVALID_LKEY); + scat[i].addr = 0; + } + + if (qp->wq_sig) { + sig = (struct mlx5_rwqe_sig *)scat; + set_sig_seg(sig, (qp->rq.max_gs + 1) << 2); + } + + qp->rq.wrid[ind] = wr->wr_id; + + ind = (ind + 1) & (qp->rq.wqe_cnt - 1); + } + +out: + if (likely(nreq)) { + qp->rq.head += nreq; + + /* Make sure that descriptors are written before + * doorbell record. + */ + wmb(); + + *qp->db.db = cpu_to_be32(qp->rq.head & 0xffff); + } + + spin_unlock_irqrestore(&qp->rq.lock, flags); + + return err; +} + +static inline enum ib_qp_state to_ib_qp_state(enum mlx5_qp_state mlx5_state) +{ + switch (mlx5_state) { + case MLX5_QP_STATE_RST: return IB_QPS_RESET; + case MLX5_QP_STATE_INIT: return IB_QPS_INIT; + case MLX5_QP_STATE_RTR: return IB_QPS_RTR; + case MLX5_QP_STATE_RTS: return IB_QPS_RTS; + case MLX5_QP_STATE_SQ_DRAINING: + case MLX5_QP_STATE_SQD: return IB_QPS_SQD; + case MLX5_QP_STATE_SQER: return IB_QPS_SQE; + case MLX5_QP_STATE_ERR: return IB_QPS_ERR; + default: return -1; + } +} + +static inline enum ib_mig_state to_ib_mig_state(int mlx5_mig_state) +{ + switch (mlx5_mig_state) { + case MLX5_QP_PM_ARMED: return IB_MIG_ARMED; + case MLX5_QP_PM_REARM: return IB_MIG_REARM; + case MLX5_QP_PM_MIGRATED: return IB_MIG_MIGRATED; + default: return -1; + } +} + +static int to_ib_qp_access_flags(int mlx5_flags) +{ + int ib_flags = 0; + + if (mlx5_flags & MLX5_QP_BIT_RRE) + ib_flags |= IB_ACCESS_REMOTE_READ; + if (mlx5_flags & MLX5_QP_BIT_RWE) + ib_flags |= IB_ACCESS_REMOTE_WRITE; + if (mlx5_flags & MLX5_QP_BIT_RAE) + ib_flags |= IB_ACCESS_REMOTE_ATOMIC; + + return ib_flags; +} + +static void to_ib_ah_attr(struct mlx5_ib_dev *ibdev, struct ib_ah_attr *ib_ah_attr, + struct mlx5_qp_path *path) +{ + struct mlx5_core_dev *dev = &ibdev->mdev; + + memset(ib_ah_attr, 0, sizeof(*ib_ah_attr)); + ib_ah_attr->port_num = path->port; + + if (ib_ah_attr->port_num == 0 || ib_ah_attr->port_num > dev->caps.num_ports) + return; + + ib_ah_attr->sl = path->sl & 0xf; + + ib_ah_attr->dlid = be16_to_cpu(path->rlid); + ib_ah_attr->src_path_bits = path->grh_mlid & 0x7f; + ib_ah_attr->static_rate = path->static_rate ? path->static_rate - 5 : 0; + ib_ah_attr->ah_flags = (path->grh_mlid & (1 << 7)) ? IB_AH_GRH : 0; + if (ib_ah_attr->ah_flags) { + ib_ah_attr->grh.sgid_index = path->mgid_index; + ib_ah_attr->grh.hop_limit = path->hop_limit; + ib_ah_attr->grh.traffic_class = + (be32_to_cpu(path->tclass_flowlabel) >> 20) & 0xff; + ib_ah_attr->grh.flow_label = + be32_to_cpu(path->tclass_flowlabel) & 0xfffff; + memcpy(ib_ah_attr->grh.dgid.raw, + path->rgid, sizeof(ib_ah_attr->grh.dgid.raw)); + } +} + +int mlx5_ib_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *qp_attr, int qp_attr_mask, + struct ib_qp_init_attr *qp_init_attr) +{ + struct mlx5_ib_dev *dev = to_mdev(ibqp->device); + struct mlx5_ib_qp *qp = to_mqp(ibqp); + struct mlx5_query_qp_mbox_out *outb; + struct mlx5_qp_context *context; + int mlx5_state; + int err = 0; + + mutex_lock(&qp->mutex); + outb = kzalloc(sizeof(*outb), GFP_KERNEL); + if (!outb) { + err = -ENOMEM; + goto out; + } + context = &outb->ctx; + err = mlx5_core_qp_query(&dev->mdev, &qp->mqp, outb, sizeof(*outb)); + if (err) + goto out_free; + + mlx5_state = be32_to_cpu(context->flags) >> 28; + + qp->state = to_ib_qp_state(mlx5_state); + qp_attr->qp_state = qp->state; + qp_attr->path_mtu = context->mtu_msgmax >> 5; + qp_attr->path_mig_state = + to_ib_mig_state((be32_to_cpu(context->flags) >> 11) & 0x3); + qp_attr->qkey = be32_to_cpu(context->qkey); + qp_attr->rq_psn = be32_to_cpu(context->rnr_nextrecvpsn) & 0xffffff; + qp_attr->sq_psn = be32_to_cpu(context->next_send_psn) & 0xffffff; + qp_attr->dest_qp_num = be32_to_cpu(context->log_pg_sz_remote_qpn) & 0xffffff; + qp_attr->qp_access_flags = + to_ib_qp_access_flags(be32_to_cpu(context->params2)); + + if (qp->ibqp.qp_type == IB_QPT_RC || qp->ibqp.qp_type == IB_QPT_UC) { + to_ib_ah_attr(dev, &qp_attr->ah_attr, &context->pri_path); + to_ib_ah_attr(dev, &qp_attr->alt_ah_attr, &context->alt_path); + qp_attr->alt_pkey_index = context->alt_path.pkey_index & 0x7f; + qp_attr->alt_port_num = qp_attr->alt_ah_attr.port_num; + } + + qp_attr->pkey_index = context->pri_path.pkey_index & 0x7f; + qp_attr->port_num = context->pri_path.port; + + /* qp_attr->en_sqd_async_notify is only applicable in modify qp */ + qp_attr->sq_draining = mlx5_state == MLX5_QP_STATE_SQ_DRAINING; + + qp_attr->max_rd_atomic = 1 << ((be32_to_cpu(context->params1) >> 21) & 0x7); + + qp_attr->max_dest_rd_atomic = + 1 << ((be32_to_cpu(context->params2) >> 21) & 0x7); + qp_attr->min_rnr_timer = + (be32_to_cpu(context->rnr_nextrecvpsn) >> 24) & 0x1f; + qp_attr->timeout = context->pri_path.ackto_lt >> 3; + qp_attr->retry_cnt = (be32_to_cpu(context->params1) >> 16) & 0x7; + qp_attr->rnr_retry = (be32_to_cpu(context->params1) >> 13) & 0x7; + qp_attr->alt_timeout = context->alt_path.ackto_lt >> 3; + qp_attr->cur_qp_state = qp_attr->qp_state; + qp_attr->cap.max_recv_wr = qp->rq.wqe_cnt; + qp_attr->cap.max_recv_sge = qp->rq.max_gs; + + if (!ibqp->uobject) { + qp_attr->cap.max_send_wr = qp->sq.wqe_cnt; + qp_attr->cap.max_send_sge = qp->sq.max_gs; + } else { + qp_attr->cap.max_send_wr = 0; + qp_attr->cap.max_send_sge = 0; + } + + /* We don't support inline sends for kernel QPs (yet), and we + * don't know what userspace's value should be. + */ + qp_attr->cap.max_inline_data = 0; + + qp_init_attr->cap = qp_attr->cap; + + qp_init_attr->create_flags = 0; + if (qp->flags & MLX5_IB_QP_BLOCK_MULTICAST_LOOPBACK) + qp_init_attr->create_flags |= IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK; + + qp_init_attr->sq_sig_type = qp->sq_signal_bits & MLX5_WQE_CTRL_CQ_UPDATE ? + IB_SIGNAL_ALL_WR : IB_SIGNAL_REQ_WR; + +out_free: + kfree(outb); + +out: + mutex_unlock(&qp->mutex); + return err; +} + +struct ib_xrcd *mlx5_ib_alloc_xrcd(struct ib_device *ibdev, + struct ib_ucontext *context, + struct ib_udata *udata) +{ + struct mlx5_ib_dev *dev = to_mdev(ibdev); + struct mlx5_ib_xrcd *xrcd; + int err; + + if (!(dev->mdev.caps.flags & MLX5_DEV_CAP_FLAG_XRC)) + return ERR_PTR(-ENOSYS); + + xrcd = kmalloc(sizeof(*xrcd), GFP_KERNEL); + if (!xrcd) + return ERR_PTR(-ENOMEM); + + err = mlx5_core_xrcd_alloc(&dev->mdev, &xrcd->xrcdn); + if (err) { + kfree(xrcd); + return ERR_PTR(-ENOMEM); + } + + return &xrcd->ibxrcd; +} + +int mlx5_ib_dealloc_xrcd(struct ib_xrcd *xrcd) +{ + struct mlx5_ib_dev *dev = to_mdev(xrcd->device); + u32 xrcdn = to_mxrcd(xrcd)->xrcdn; + int err; + + err = mlx5_core_xrcd_dealloc(&dev->mdev, xrcdn); + if (err) { + mlx5_ib_warn(dev, "failed to dealloc xrcdn 0x%x\n", xrcdn); + return err; + } + + kfree(xrcd); + + return 0; +} diff --git a/drivers/infiniband/hw/mlx5/srq.c b/drivers/infiniband/hw/mlx5/srq.c new file mode 100644 index 000000000000..84d297afd6a9 --- /dev/null +++ b/drivers/infiniband/hw/mlx5/srq.c @@ -0,0 +1,473 @@ +/* + * Copyright (c) 2013, Mellanox Technologies inc. All rights reserved. + * + * This software is available to you under a choice of one of two + * licenses. You may choose to be licensed under the terms of the GNU + * General Public License (GPL) Version 2, available from the file + * COPYING in the main directory of this source tree, or the + * OpenIB.org BSD license below: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * - Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * - Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +#include <linux/module.h> +#include <linux/mlx5/qp.h> +#include <linux/mlx5/srq.h> +#include <linux/slab.h> +#include <rdma/ib_umem.h> + +#include "mlx5_ib.h" +#include "user.h" + +/* not supported currently */ +static int srq_signature; + +static void *get_wqe(struct mlx5_ib_srq *srq, int n) +{ + return mlx5_buf_offset(&srq->buf, n << srq->msrq.wqe_shift); +} + +static void mlx5_ib_srq_event(struct mlx5_core_srq *srq, enum mlx5_event type) +{ + struct ib_event event; + struct ib_srq *ibsrq = &to_mibsrq(srq)->ibsrq; + + if (ibsrq->event_handler) { + event.device = ibsrq->device; + event.element.srq = ibsrq; + switch (type) { + case MLX5_EVENT_TYPE_SRQ_RQ_LIMIT: + event.event = IB_EVENT_SRQ_LIMIT_REACHED; + break; + case MLX5_EVENT_TYPE_SRQ_CATAS_ERROR: + event.event = IB_EVENT_SRQ_ERR; + break; + default: + pr_warn("mlx5_ib: Unexpected event type %d on SRQ %06x\n", + type, srq->srqn); + return; + } + + ibsrq->event_handler(&event, ibsrq->srq_context); + } +} + +static int create_srq_user(struct ib_pd *pd, struct mlx5_ib_srq *srq, + struct mlx5_create_srq_mbox_in **in, + struct ib_udata *udata, int buf_size, int *inlen) +{ + struct mlx5_ib_dev *dev = to_mdev(pd->device); + struct mlx5_ib_create_srq ucmd; + int err; + int npages; + int page_shift; + int ncont; + u32 offset; + + if (ib_copy_from_udata(&ucmd, udata, sizeof(ucmd))) { + mlx5_ib_dbg(dev, "failed copy udata\n"); + return -EFAULT; + } + srq->wq_sig = !!(ucmd.flags & MLX5_SRQ_FLAG_SIGNATURE); + + srq->umem = ib_umem_get(pd->uobject->context, ucmd.buf_addr, buf_size, + 0, 0); + if (IS_ERR(srq->umem)) { + mlx5_ib_dbg(dev, "failed umem get, size %d\n", buf_size); + err = PTR_ERR(srq->umem); + return err; + } + + mlx5_ib_cont_pages(srq->umem, ucmd.buf_addr, &npages, + &page_shift, &ncont, NULL); + err = mlx5_ib_get_buf_offset(ucmd.buf_addr, page_shift, + &offset); + if (err) { + mlx5_ib_warn(dev, "bad offset\n"); + goto err_umem; + } + + *inlen = sizeof(**in) + sizeof(*(*in)->pas) * ncont; + *in = mlx5_vzalloc(*inlen); + if (!(*in)) { + err = -ENOMEM; + goto err_umem; + } + + mlx5_ib_populate_pas(dev, srq->umem, page_shift, (*in)->pas, 0); + + err = mlx5_ib_db_map_user(to_mucontext(pd->uobject->context), + ucmd.db_addr, &srq->db); + if (err) { + mlx5_ib_dbg(dev, "map doorbell failed\n"); + goto err_in; + } + + (*in)->ctx.log_pg_sz = page_shift - PAGE_SHIFT; + (*in)->ctx.pgoff_cqn = cpu_to_be32(offset << 26); + + return 0; + +err_in: + mlx5_vfree(*in); + +err_umem: + ib_umem_release(srq->umem); + + return err; +} + +static int create_srq_kernel(struct mlx5_ib_dev *dev, struct mlx5_ib_srq *srq, + struct mlx5_create_srq_mbox_in **in, int buf_size, + int *inlen) +{ + int err; + int i; + struct mlx5_wqe_srq_next_seg *next; + int page_shift; + int npages; + + err = mlx5_db_alloc(&dev->mdev, &srq->db); + if (err) { + mlx5_ib_warn(dev, "alloc dbell rec failed\n"); + return err; + } + + *srq->db.db = 0; + + if (mlx5_buf_alloc(&dev->mdev, buf_size, PAGE_SIZE * 2, &srq->buf)) { + mlx5_ib_dbg(dev, "buf alloc failed\n"); + err = -ENOMEM; + goto err_db; + } + page_shift = srq->buf.page_shift; + + srq->head = 0; + srq->tail = srq->msrq.max - 1; + srq->wqe_ctr = 0; + + for (i = 0; i < srq->msrq.max; i++) { + next = get_wqe(srq, i); + next->next_wqe_index = + cpu_to_be16((i + 1) & (srq->msrq.max - 1)); + } + + npages = DIV_ROUND_UP(srq->buf.npages, 1 << (page_shift - PAGE_SHIFT)); + mlx5_ib_dbg(dev, "buf_size %d, page_shift %d, npages %d, calc npages %d\n", + buf_size, page_shift, srq->buf.npages, npages); + *inlen = sizeof(**in) + sizeof(*(*in)->pas) * npages; + *in = mlx5_vzalloc(*inlen); + if (!*in) { + err = -ENOMEM; + goto err_buf; + } + mlx5_fill_page_array(&srq->buf, (*in)->pas); + + srq->wrid = kmalloc(srq->msrq.max * sizeof(u64), GFP_KERNEL); + if (!srq->wrid) { + mlx5_ib_dbg(dev, "kmalloc failed %lu\n", + (unsigned long)(srq->msrq.max * sizeof(u64))); + err = -ENOMEM; + goto err_in; + } + srq->wq_sig = !!srq_signature; + + (*in)->ctx.log_pg_sz = page_shift - PAGE_SHIFT; + + return 0; + +err_in: + mlx5_vfree(*in); + +err_buf: + mlx5_buf_free(&dev->mdev, &srq->buf); + +err_db: + mlx5_db_free(&dev->mdev, &srq->db); + return err; +} + +static void destroy_srq_user(struct ib_pd *pd, struct mlx5_ib_srq *srq) +{ + mlx5_ib_db_unmap_user(to_mucontext(pd->uobject->context), &srq->db); + ib_umem_release(srq->umem); +} + + +static void destroy_srq_kernel(struct mlx5_ib_dev *dev, struct mlx5_ib_srq *srq) +{ + kfree(srq->wrid); + mlx5_buf_free(&dev->mdev, &srq->buf); + mlx5_db_free(&dev->mdev, &srq->db); +} + +struct ib_srq *mlx5_ib_create_srq(struct ib_pd *pd, + struct ib_srq_init_attr *init_attr, + struct ib_udata *udata) +{ + struct mlx5_ib_dev *dev = to_mdev(pd->device); + struct mlx5_ib_srq *srq; + int desc_size; + int buf_size; + int err; + struct mlx5_create_srq_mbox_in *uninitialized_var(in); + int uninitialized_var(inlen); + int is_xrc; + u32 flgs, xrcdn; + + /* Sanity check SRQ size before proceeding */ + if (init_attr->attr.max_wr >= dev->mdev.caps.max_srq_wqes) { + mlx5_ib_dbg(dev, "max_wr %d, cap %d\n", + init_attr->attr.max_wr, + dev->mdev.caps.max_srq_wqes); + return ERR_PTR(-EINVAL); + } + + srq = kmalloc(sizeof(*srq), GFP_KERNEL); + if (!srq) + return ERR_PTR(-ENOMEM); + + mutex_init(&srq->mutex); + spin_lock_init(&srq->lock); + srq->msrq.max = roundup_pow_of_two(init_attr->attr.max_wr + 1); + srq->msrq.max_gs = init_attr->attr.max_sge; + + desc_size = sizeof(struct mlx5_wqe_srq_next_seg) + + srq->msrq.max_gs * sizeof(struct mlx5_wqe_data_seg); + desc_size = roundup_pow_of_two(desc_size); + desc_size = max_t(int, 32, desc_size); + srq->msrq.max_avail_gather = (desc_size - sizeof(struct mlx5_wqe_srq_next_seg)) / + sizeof(struct mlx5_wqe_data_seg); + srq->msrq.wqe_shift = ilog2(desc_size); + buf_size = srq->msrq.max * desc_size; + mlx5_ib_dbg(dev, "desc_size 0x%x, req wr 0x%x, srq size 0x%x, max_gs 0x%x, max_avail_gather 0x%x\n", + desc_size, init_attr->attr.max_wr, srq->msrq.max, srq->msrq.max_gs, + srq->msrq.max_avail_gather); + + if (pd->uobject) + err = create_srq_user(pd, srq, &in, udata, buf_size, &inlen); + else + err = create_srq_kernel(dev, srq, &in, buf_size, &inlen); + + if (err) { + mlx5_ib_warn(dev, "create srq %s failed, err %d\n", + pd->uobject ? "user" : "kernel", err); + goto err_srq; + } + + is_xrc = (init_attr->srq_type == IB_SRQT_XRC); + in->ctx.state_log_sz = ilog2(srq->msrq.max); + flgs = ((srq->msrq.wqe_shift - 4) | (is_xrc << 5) | (srq->wq_sig << 7)) << 24; + xrcdn = 0; + if (is_xrc) { + xrcdn = to_mxrcd(init_attr->ext.xrc.xrcd)->xrcdn; + in->ctx.pgoff_cqn |= cpu_to_be32(to_mcq(init_attr->ext.xrc.cq)->mcq.cqn); + } else if (init_attr->srq_type == IB_SRQT_BASIC) { + xrcdn = to_mxrcd(dev->devr.x0)->xrcdn; + in->ctx.pgoff_cqn |= cpu_to_be32(to_mcq(dev->devr.c0)->mcq.cqn); + } + + in->ctx.flags_xrcd = cpu_to_be32((flgs & 0xFF000000) | (xrcdn & 0xFFFFFF)); + + in->ctx.pd = cpu_to_be32(to_mpd(pd)->pdn); + in->ctx.db_record = cpu_to_be64(srq->db.dma); + err = mlx5_core_create_srq(&dev->mdev, &srq->msrq, in, inlen); + mlx5_vfree(in); + if (err) { + mlx5_ib_dbg(dev, "create SRQ failed, err %d\n", err); + goto err_srq; + } + + mlx5_ib_dbg(dev, "create SRQ with srqn 0x%x\n", srq->msrq.srqn); + + srq->msrq.event = mlx5_ib_srq_event; + srq->ibsrq.ext.xrc.srq_num = srq->msrq.srqn; + + if (pd->uobject) + if (ib_copy_to_udata(udata, &srq->msrq.srqn, sizeof(__u32))) { + mlx5_ib_dbg(dev, "copy to user failed\n"); + err = -EFAULT; + goto err_core; + } + + init_attr->attr.max_wr = srq->msrq.max - 1; + + return &srq->ibsrq; + +err_core: + mlx5_core_destroy_srq(&dev->mdev, &srq->msrq); + if (pd->uobject) + destroy_srq_user(pd, srq); + else + destroy_srq_kernel(dev, srq); + +err_srq: + kfree(srq); + + return ERR_PTR(err); +} + +int mlx5_ib_modify_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr, + enum ib_srq_attr_mask attr_mask, struct ib_udata *udata) +{ + struct mlx5_ib_dev *dev = to_mdev(ibsrq->device); + struct mlx5_ib_srq *srq = to_msrq(ibsrq); + int ret; + + /* We don't support resizing SRQs yet */ + if (attr_mask & IB_SRQ_MAX_WR) + return -EINVAL; + + if (attr_mask & IB_SRQ_LIMIT) { + if (attr->srq_limit >= srq->msrq.max) + return -EINVAL; + + mutex_lock(&srq->mutex); + ret = mlx5_core_arm_srq(&dev->mdev, &srq->msrq, attr->srq_limit, 1); + mutex_unlock(&srq->mutex); + + if (ret) + return ret; + } + + return 0; +} + +int mlx5_ib_query_srq(struct ib_srq *ibsrq, struct ib_srq_attr *srq_attr) +{ + struct mlx5_ib_dev *dev = to_mdev(ibsrq->device); + struct mlx5_ib_srq *srq = to_msrq(ibsrq); + int ret; + struct mlx5_query_srq_mbox_out *out; + + out = kzalloc(sizeof(*out), GFP_KERNEL); + if (!out) + return -ENOMEM; + + ret = mlx5_core_query_srq(&dev->mdev, &srq->msrq, out); + if (ret) + goto out_box; + + srq_attr->srq_limit = be16_to_cpu(out->ctx.lwm); + srq_attr->max_wr = srq->msrq.max - 1; + srq_attr->max_sge = srq->msrq.max_gs; + +out_box: + kfree(out); + return ret; +} + +int mlx5_ib_destroy_srq(struct ib_srq *srq) +{ + struct mlx5_ib_dev *dev = to_mdev(srq->device); + struct mlx5_ib_srq *msrq = to_msrq(srq); + + mlx5_core_destroy_srq(&dev->mdev, &msrq->msrq); + + if (srq->uobject) { + mlx5_ib_db_unmap_user(to_mucontext(srq->uobject->context), &msrq->db); + ib_umem_release(msrq->umem); + } else { + kfree(msrq->wrid); + mlx5_buf_free(&dev->mdev, &msrq->buf); + mlx5_db_free(&dev->mdev, &msrq->db); + } + + kfree(srq); + return 0; +} + +void mlx5_ib_free_srq_wqe(struct mlx5_ib_srq *srq, int wqe_index) +{ + struct mlx5_wqe_srq_next_seg *next; + + /* always called with interrupts disabled. */ + spin_lock(&srq->lock); + + next = get_wqe(srq, srq->tail); + next->next_wqe_index = cpu_to_be16(wqe_index); + srq->tail = wqe_index; + + spin_unlock(&srq->lock); +} + +int mlx5_ib_post_srq_recv(struct ib_srq *ibsrq, struct ib_recv_wr *wr, + struct ib_recv_wr **bad_wr) +{ + struct mlx5_ib_srq *srq = to_msrq(ibsrq); + struct mlx5_wqe_srq_next_seg *next; + struct mlx5_wqe_data_seg *scat; + unsigned long flags; + int err = 0; + int nreq; + int i; + + spin_lock_irqsave(&srq->lock, flags); + + for (nreq = 0; wr; nreq++, wr = wr->next) { + if (unlikely(wr->num_sge > srq->msrq.max_gs)) { + err = -EINVAL; + *bad_wr = wr; + break; + } + + if (unlikely(srq->head == srq->tail)) { + err = -ENOMEM; + *bad_wr = wr; + break; + } + + srq->wrid[srq->head] = wr->wr_id; + + next = get_wqe(srq, srq->head); + srq->head = be16_to_cpu(next->next_wqe_index); + scat = (struct mlx5_wqe_data_seg *)(next + 1); + + for (i = 0; i < wr->num_sge; i++) { + scat[i].byte_count = cpu_to_be32(wr->sg_list[i].length); + scat[i].lkey = cpu_to_be32(wr->sg_list[i].lkey); + scat[i].addr = cpu_to_be64(wr->sg_list[i].addr); + } + + if (i < srq->msrq.max_avail_gather) { + scat[i].byte_count = 0; + scat[i].lkey = cpu_to_be32(MLX5_INVALID_LKEY); + scat[i].addr = 0; + } + } + + if (likely(nreq)) { + srq->wqe_ctr += nreq; + + /* Make sure that descriptors are written before + * doorbell record. + */ + wmb(); + + *srq->db.db = cpu_to_be32(srq->wqe_ctr); + } + + spin_unlock_irqrestore(&srq->lock, flags); + + return err; +} diff --git a/drivers/infiniband/hw/mlx5/user.h b/drivers/infiniband/hw/mlx5/user.h new file mode 100644 index 000000000000..a886de3e593c --- /dev/null +++ b/drivers/infiniband/hw/mlx5/user.h @@ -0,0 +1,121 @@ +/* + * Copyright (c) 2013, Mellanox Technologies inc. All rights reserved. + * + * This software is available to you under a choice of one of two + * licenses. You may choose to be licensed under the terms of the GNU + * General Public License (GPL) Version 2, available from the file + * COPYING in the main directory of this source tree, or the + * OpenIB.org BSD license below: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * - Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * - Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +#ifndef MLX5_IB_USER_H +#define MLX5_IB_USER_H + +#include <linux/types.h> + +enum { + MLX5_QP_FLAG_SIGNATURE = 1 << 0, + MLX5_QP_FLAG_SCATTER_CQE = 1 << 1, +}; + +enum { + MLX5_SRQ_FLAG_SIGNATURE = 1 << 0, +}; + + +/* Increment this value if any changes that break userspace ABI + * compatibility are made. + */ +#define MLX5_IB_UVERBS_ABI_VERSION 1 + +/* Make sure that all structs defined in this file remain laid out so + * that they pack the same way on 32-bit and 64-bit architectures (to + * avoid incompatibility between 32-bit userspace and 64-bit kernels). + * In particular do not use pointer types -- pass pointers in __u64 + * instead. + */ + +struct mlx5_ib_alloc_ucontext_req { + __u32 total_num_uuars; + __u32 num_low_latency_uuars; +}; + +struct mlx5_ib_alloc_ucontext_resp { + __u32 qp_tab_size; + __u32 bf_reg_size; + __u32 tot_uuars; + __u32 cache_line_size; + __u16 max_sq_desc_sz; + __u16 max_rq_desc_sz; + __u32 max_send_wqebb; + __u32 max_recv_wr; + __u32 max_srq_recv_wr; + __u16 num_ports; + __u16 reserved; +}; + +struct mlx5_ib_alloc_pd_resp { + __u32 pdn; +}; + +struct mlx5_ib_create_cq { + __u64 buf_addr; + __u64 db_addr; + __u32 cqe_size; +}; + +struct mlx5_ib_create_cq_resp { + __u32 cqn; + __u32 reserved; +}; + +struct mlx5_ib_resize_cq { + __u64 buf_addr; +}; + +struct mlx5_ib_create_srq { + __u64 buf_addr; + __u64 db_addr; + __u32 flags; +}; + +struct mlx5_ib_create_srq_resp { + __u32 srqn; + __u32 reserved; +}; + +struct mlx5_ib_create_qp { + __u64 buf_addr; + __u64 db_addr; + __u32 sq_wqe_count; + __u32 rq_wqe_count; + __u32 rq_wqe_shift; + __u32 flags; +}; + +struct mlx5_ib_create_qp_resp { + __u32 uuar_index; +}; +#endif /* MLX5_IB_USER_H */ diff --git a/drivers/net/ethernet/mellanox/Kconfig b/drivers/net/ethernet/mellanox/Kconfig index bcdbc14aeff0..8cf7563a8d92 100644 --- a/drivers/net/ethernet/mellanox/Kconfig +++ b/drivers/net/ethernet/mellanox/Kconfig @@ -19,5 +19,6 @@ config NET_VENDOR_MELLANOX if NET_VENDOR_MELLANOX source "drivers/net/ethernet/mellanox/mlx4/Kconfig" +source "drivers/net/ethernet/mellanox/mlx5/core/Kconfig" endif # NET_VENDOR_MELLANOX diff --git a/drivers/net/ethernet/mellanox/Makefile b/drivers/net/ethernet/mellanox/Makefile index 37afb9683372..38fe32ef5e5f 100644 --- a/drivers/net/ethernet/mellanox/Makefile +++ b/drivers/net/ethernet/mellanox/Makefile @@ -3,3 +3,4 @@ # obj-$(CONFIG_MLX4_CORE) += mlx4/ +obj-$(CONFIG_MLX5_CORE) += mlx5/core/ diff --git a/drivers/net/ethernet/mellanox/mlx5/core/Kconfig b/drivers/net/ethernet/mellanox/mlx5/core/Kconfig new file mode 100644 index 000000000000..21962828925a --- /dev/null +++ b/drivers/net/ethernet/mellanox/mlx5/core/Kconfig @@ -0,0 +1,18 @@ +# +# Mellanox driver configuration +# + +config MLX5_CORE + tristate + depends on PCI && X86 + default n + +config MLX5_DEBUG + bool "Verbose debugging output" if (MLX5_CORE && EXPERT) + depends on MLX5_CORE + default y + ---help--- + This option causes debugging code to be compiled into the + mlx5_core driver. The output can be turned on via the + debug_mask module parameter (which can also be set after + the driver is loaded through sysfs). diff --git a/drivers/net/ethernet/mellanox/mlx5/core/Makefile b/drivers/net/ethernet/mellanox/mlx5/core/Makefile new file mode 100644 index 000000000000..105780bb980b --- /dev/null +++ b/drivers/net/ethernet/mellanox/mlx5/core/Makefile @@ -0,0 +1,5 @@ +obj-$(CONFIG_MLX5_CORE) += mlx5_core.o + +mlx5_core-y := main.o cmd.o debugfs.o fw.o eq.o uar.o pagealloc.o \ + health.o mcg.o cq.o srq.o alloc.o qp.o port.o mr.o pd.o \ + mad.o diff --git a/drivers/net/ethernet/mellanox/mlx5/core/alloc.c b/drivers/net/ethernet/mellanox/mlx5/core/alloc.c new file mode 100644 index 000000000000..b215742b842f --- /dev/null +++ b/drivers/net/ethernet/mellanox/mlx5/core/alloc.c @@ -0,0 +1,238 @@ +/* + * Copyright (c) 2013, Mellanox Technologies inc. All rights reserved. + * + * This software is available to you under a choice of one of two + * licenses. You may choose to be licensed under the terms of the GNU + * General Public License (GPL) Version 2, available from the file + * COPYING in the main directory of this source tree, or the + * OpenIB.org BSD license below: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * - Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * - Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +#include <linux/errno.h> +#include <linux/slab.h> +#include <linux/mm.h> +#include <linux/export.h> +#include <linux/bitmap.h> +#include <linux/dma-mapping.h> +#include <linux/vmalloc.h> +#include <linux/mlx5/driver.h> + +#include "mlx5_core.h" + +/* Handling for queue buffers -- we allocate a bunch of memory and + * register it in a memory region at HCA virtual address 0. If the + * requested size is > max_direct, we split the allocation into + * multiple pages, so we don't require too much contiguous memory. + */ + +int mlx5_buf_alloc(struct mlx5_core_dev *dev, int size, int max_direct, + struct mlx5_buf *buf) +{ + dma_addr_t t; + + buf->size = size; + if (size <= max_direct) { + buf->nbufs = 1; + buf->npages = 1; + buf->page_shift = get_order(size) + PAGE_SHIFT; + buf->direct.buf = dma_zalloc_coherent(&dev->pdev->dev, + size, &t, GFP_KERNEL); + if (!buf->direct.buf) + return -ENOMEM; + + buf->direct.map = t; + + while (t & ((1 << buf->page_shift) - 1)) { + --buf->page_shift; + buf->npages *= 2; + } + } else { + int i; + + buf->direct.buf = NULL; + buf->nbufs = (size + PAGE_SIZE - 1) / PAGE_SIZE; + buf->npages = buf->nbufs; + buf->page_shift = PAGE_SHIFT; + buf->page_list = kcalloc(buf->nbufs, sizeof(*buf->page_list), + GFP_KERNEL); + if (!buf->page_list) + return -ENOMEM; + + for (i = 0; i < buf->nbufs; i++) { + buf->page_list[i].buf = + dma_zalloc_coherent(&dev->pdev->dev, PAGE_SIZE, + &t, GFP_KERNEL); + if (!buf->page_list[i].buf) + goto err_free; + + buf->page_list[i].map = t; + } + + if (BITS_PER_LONG == 64) { + struct page **pages; + pages = kmalloc(sizeof(*pages) * buf->nbufs, GFP_KERNEL); + if (!pages) + goto err_free; + for (i = 0; i < buf->nbufs; i++) + pages[i] = virt_to_page(buf->page_list[i].buf); + buf->direct.buf = vmap(pages, buf->nbufs, VM_MAP, PAGE_KERNEL); + kfree(pages); + if (!buf->direct.buf) + goto err_free; + } + } + + return 0; + +err_free: + mlx5_buf_free(dev, buf); + + return -ENOMEM; +} +EXPORT_SYMBOL_GPL(mlx5_buf_alloc); + +void mlx5_buf_free(struct mlx5_core_dev *dev, struct mlx5_buf *buf) +{ + int i; + + if (buf->nbufs == 1) + dma_free_coherent(&dev->pdev->dev, buf->size, buf->direct.buf, + buf->direct.map); + else { + if (BITS_PER_LONG == 64 && buf->direct.buf) + vunmap(buf->direct.buf); + + for (i = 0; i < buf->nbufs; i++) + if (buf->page_list[i].buf) + dma_free_coherent(&dev->pdev->dev, PAGE_SIZE, + buf->page_list[i].buf, + buf->page_list[i].map); + kfree(buf->page_list); + } +} +EXPORT_SYMBOL_GPL(mlx5_buf_free); + +static struct mlx5_db_pgdir *mlx5_alloc_db_pgdir(struct device *dma_device) +{ + struct mlx5_db_pgdir *pgdir; + + pgdir = kzalloc(sizeof(*pgdir), GFP_KERNEL); + if (!pgdir) + return NULL; + + bitmap_fill(pgdir->bitmap, MLX5_DB_PER_PAGE); + pgdir->db_page = dma_alloc_coherent(dma_device, PAGE_SIZE, + &pgdir->db_dma, GFP_KERNEL); + if (!pgdir->db_page) { + kfree(pgdir); + return NULL; + } + + return pgdir; +} + +static int mlx5_alloc_db_from_pgdir(struct mlx5_db_pgdir *pgdir, + struct mlx5_db *db) +{ + int offset; + int i; + + i = find_first_bit(pgdir->bitmap, MLX5_DB_PER_PAGE); + if (i >= MLX5_DB_PER_PAGE) + return -ENOMEM; + + __clear_bit(i, pgdir->bitmap); + + db->u.pgdir = pgdir; + db->index = i; + offset = db->index * L1_CACHE_BYTES; + db->db = pgdir->db_page + offset / sizeof(*pgdir->db_page); + db->dma = pgdir->db_dma + offset; + + return 0; +} + +int mlx5_db_alloc(struct mlx5_core_dev *dev, struct mlx5_db *db) +{ + struct mlx5_db_pgdir *pgdir; + int ret = 0; + + mutex_lock(&dev->priv.pgdir_mutex); + + list_for_each_entry(pgdir, &dev->priv.pgdir_list, list) + if (!mlx5_alloc_db_from_pgdir(pgdir, db)) + goto out; + + pgdir = mlx5_alloc_db_pgdir(&(dev->pdev->dev)); + if (!pgdir) { + ret = -ENOMEM; + goto out; + } + + list_add(&pgdir->list, &dev->priv.pgdir_list); + + /* This should never fail -- we just allocated an empty page: */ + WARN_ON(mlx5_alloc_db_from_pgdir(pgdir, db)); + +out: + mutex_unlock(&dev->priv.pgdir_mutex); + + return ret; +} +EXPORT_SYMBOL_GPL(mlx5_db_alloc); + +void mlx5_db_free(struct mlx5_core_dev *dev, struct mlx5_db *db) +{ + mutex_lock(&dev->priv.pgdir_mutex); + + __set_bit(db->index, db->u.pgdir->bitmap); + + if (bitmap_full(db->u.pgdir->bitmap, MLX5_DB_PER_PAGE)) { + dma_free_coherent(&(dev->pdev->dev), PAGE_SIZE, + db->u.pgdir->db_page, db->u.pgdir->db_dma); + list_del(&db->u.pgdir->list); + kfree(db->u.pgdir); + } + + mutex_unlock(&dev->priv.pgdir_mutex); +} +EXPORT_SYMBOL_GPL(mlx5_db_free); + + +void mlx5_fill_page_array(struct mlx5_buf *buf, __be64 *pas) +{ + u64 addr; + int i; + + for (i = 0; i < buf->npages; i++) { + if (buf->nbufs == 1) + addr = buf->direct.map + (i << buf->page_shift); + else + addr = buf->page_list[i].map; + + pas[i] = cpu_to_be64(addr); + } +} +EXPORT_SYMBOL_GPL(mlx5_fill_page_array); diff --git a/drivers/net/ethernet/mellanox/mlx5/core/cmd.c b/drivers/net/ethernet/mellanox/mlx5/core/cmd.c new file mode 100644 index 000000000000..c1c0eef89694 --- /dev/null +++ b/drivers/net/ethernet/mellanox/mlx5/core/cmd.c @@ -0,0 +1,1515 @@ +/* + * Copyright (c) 2013, Mellanox Technologies inc. All rights reserved. + * + * This software is available to you under a choice of one of two + * licenses. You may choose to be licensed under the terms of the GNU + * General Public License (GPL) Version 2, available from the file + * COPYING in the main directory of this source tree, or the + * OpenIB.org BSD license below: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * - Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * - Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +#include <asm-generic/kmap_types.h> +#include <linux/module.h> +#include <linux/init.h> +#include <linux/errno.h> +#include <linux/pci.h> +#include <linux/dma-mapping.h> +#include <linux/slab.h> +#include <linux/delay.h> +#include <linux/random.h> +#include <linux/io-mapping.h> +#include <linux/mlx5/driver.h> +#include <linux/debugfs.h> + +#include "mlx5_core.h" + +enum { + CMD_IF_REV = 3, +}; + +enum { + CMD_MODE_POLLING, + CMD_MODE_EVENTS +}; + +enum { + NUM_LONG_LISTS = 2, + NUM_MED_LISTS = 64, + LONG_LIST_SIZE = (2ULL * 1024 * 1024 * 1024 / PAGE_SIZE) * 8 + 16 + + MLX5_CMD_DATA_BLOCK_SIZE, + MED_LIST_SIZE = 16 + MLX5_CMD_DATA_BLOCK_SIZE, +}; + +enum { + MLX5_CMD_DELIVERY_STAT_OK = 0x0, + MLX5_CMD_DELIVERY_STAT_SIGNAT_ERR = 0x1, + MLX5_CMD_DELIVERY_STAT_TOK_ERR = 0x2, + MLX5_CMD_DELIVERY_STAT_BAD_BLK_NUM_ERR = 0x3, + MLX5_CMD_DELIVERY_STAT_OUT_PTR_ALIGN_ERR = 0x4, + MLX5_CMD_DELIVERY_STAT_IN_PTR_ALIGN_ERR = 0x5, + MLX5_CMD_DELIVERY_STAT_FW_ERR = 0x6, + MLX5_CMD_DELIVERY_STAT_IN_LENGTH_ERR = 0x7, + MLX5_CMD_DELIVERY_STAT_OUT_LENGTH_ERR = 0x8, + MLX5_CMD_DELIVERY_STAT_RES_FLD_NOT_CLR_ERR = 0x9, + MLX5_CMD_DELIVERY_STAT_CMD_DESCR_ERR = 0x10, +}; + +enum { + MLX5_CMD_STAT_OK = 0x0, + MLX5_CMD_STAT_INT_ERR = 0x1, + MLX5_CMD_STAT_BAD_OP_ERR = 0x2, + MLX5_CMD_STAT_BAD_PARAM_ERR = 0x3, + MLX5_CMD_STAT_BAD_SYS_STATE_ERR = 0x4, + MLX5_CMD_STAT_BAD_RES_ERR = 0x5, + MLX5_CMD_STAT_RES_BUSY = 0x6, + MLX5_CMD_STAT_LIM_ERR = 0x8, + MLX5_CMD_STAT_BAD_RES_STATE_ERR = 0x9, + MLX5_CMD_STAT_IX_ERR = 0xa, + MLX5_CMD_STAT_NO_RES_ERR = 0xf, + MLX5_CMD_STAT_BAD_INP_LEN_ERR = 0x50, + MLX5_CMD_STAT_BAD_OUTP_LEN_ERR = 0x51, + MLX5_CMD_STAT_BAD_QP_STATE_ERR = 0x10, + MLX5_CMD_STAT_BAD_PKT_ERR = 0x30, + MLX5_CMD_STAT_BAD_SIZE_OUTS_CQES_ERR = 0x40, +}; + +static struct mlx5_cmd_work_ent *alloc_cmd(struct mlx5_cmd *cmd, + struct mlx5_cmd_msg *in, + struct mlx5_cmd_msg *out, + mlx5_cmd_cbk_t cbk, + void *context, int page_queue) +{ + gfp_t alloc_flags = cbk ? GFP_ATOMIC : GFP_KERNEL; + struct mlx5_cmd_work_ent *ent; + + ent = kzalloc(sizeof(*ent), alloc_flags); + if (!ent) + return ERR_PTR(-ENOMEM); + + ent->in = in; + ent->out = out; + ent->callback = cbk; + ent->context = context; + ent->cmd = cmd; + ent->page_queue = page_queue; + + return ent; +} + +static u8 alloc_token(struct mlx5_cmd *cmd) +{ + u8 token; + + spin_lock(&cmd->token_lock); + token = cmd->token++ % 255 + 1; + spin_unlock(&cmd->token_lock); + + return token; +} + +static int alloc_ent(struct mlx5_cmd *cmd) +{ + unsigned long flags; + int ret; + + spin_lock_irqsave(&cmd->alloc_lock, flags); + ret = find_first_bit(&cmd->bitmask, cmd->max_reg_cmds); + if (ret < cmd->max_reg_cmds) + clear_bit(ret, &cmd->bitmask); + spin_unlock_irqrestore(&cmd->alloc_lock, flags); + + return ret < cmd->max_reg_cmds ? ret : -ENOMEM; +} + +static void free_ent(struct mlx5_cmd *cmd, int idx) +{ + unsigned long flags; + + spin_lock_irqsave(&cmd->alloc_lock, flags); + set_bit(idx, &cmd->bitmask); + spin_unlock_irqrestore(&cmd->alloc_lock, flags); +} + +static struct mlx5_cmd_layout *get_inst(struct mlx5_cmd *cmd, int idx) +{ + return cmd->cmd_buf + (idx << cmd->log_stride); +} + +static u8 xor8_buf(void *buf, int len) +{ + u8 *ptr = buf; + u8 sum = 0; + int i; + + for (i = 0; i < len; i++) + sum ^= ptr[i]; + + return sum; +} + +static int verify_block_sig(struct mlx5_cmd_prot_block *block) +{ + if (xor8_buf(block->rsvd0, sizeof(*block) - sizeof(block->data) - 1) != 0xff) + return -EINVAL; + + if (xor8_buf(block, sizeof(*block)) != 0xff) + return -EINVAL; + + return 0; +} + +static void calc_block_sig(struct mlx5_cmd_prot_block *block, u8 token) +{ + block->token = token; + block->ctrl_sig = ~xor8_buf(block->rsvd0, sizeof(*block) - sizeof(block->data) - 2); + block->sig = ~xor8_buf(block, sizeof(*block) - 1); +} + +static void calc_chain_sig(struct mlx5_cmd_msg *msg, u8 token) +{ + struct mlx5_cmd_mailbox *next = msg->next; + + while (next) { + calc_block_sig(next->buf, token); + next = next->next; + } +} + +static void set_signature(struct mlx5_cmd_work_ent *ent) +{ + ent->lay->sig = ~xor8_buf(ent->lay, sizeof(*ent->lay)); + calc_chain_sig(ent->in, ent->token); + calc_chain_sig(ent->out, ent->token); +} + +static void poll_timeout(struct mlx5_cmd_work_ent *ent) +{ + unsigned long poll_end = jiffies + msecs_to_jiffies(MLX5_CMD_TIMEOUT_MSEC + 1000); + u8 own; + + do { + own = ent->lay->status_own; + if (!(own & CMD_OWNER_HW)) { + ent->ret = 0; + return; + } + usleep_range(5000, 10000); + } while (time_before(jiffies, poll_end)); + + ent->ret = -ETIMEDOUT; +} + +static void free_cmd(struct mlx5_cmd_work_ent *ent) +{ + kfree(ent); +} + + +static int verify_signature(struct mlx5_cmd_work_ent *ent) +{ + struct mlx5_cmd_mailbox *next = ent->out->next; + int err; + u8 sig; + + sig = xor8_buf(ent->lay, sizeof(*ent->lay)); + if (sig != 0xff) + return -EINVAL; + + while (next) { + err = verify_block_sig(next->buf); + if (err) + return err; + + next = next->next; + } + + return 0; +} + +static void dump_buf(void *buf, int size, int data_only, int offset) +{ + __be32 *p = buf; + int i; + + for (i = 0; i < size; i += 16) { + pr_debug("%03x: %08x %08x %08x %08x\n", offset, be32_to_cpu(p[0]), + be32_to_cpu(p[1]), be32_to_cpu(p[2]), + be32_to_cpu(p[3])); + p += 4; + offset += 16; + } + if (!data_only) + pr_debug("\n"); +} + +const char *mlx5_command_str(int command) +{ + switch (command) { + case MLX5_CMD_OP_QUERY_HCA_CAP: + return "QUERY_HCA_CAP"; + + case MLX5_CMD_OP_SET_HCA_CAP: + return "SET_HCA_CAP"; + + case MLX5_CMD_OP_QUERY_ADAPTER: + return "QUERY_ADAPTER"; + + case MLX5_CMD_OP_INIT_HCA: + return "INIT_HCA"; + + case MLX5_CMD_OP_TEARDOWN_HCA: + return "TEARDOWN_HCA"; + + case MLX5_CMD_OP_QUERY_PAGES: + return "QUERY_PAGES"; + + case MLX5_CMD_OP_MANAGE_PAGES: + return "MANAGE_PAGES"; + + case MLX5_CMD_OP_CREATE_MKEY: + return "CREATE_MKEY"; + + case MLX5_CMD_OP_QUERY_MKEY: + return "QUERY_MKEY"; + + case MLX5_CMD_OP_DESTROY_MKEY: + return "DESTROY_MKEY"; + + case MLX5_CMD_OP_QUERY_SPECIAL_CONTEXTS: + return "QUERY_SPECIAL_CONTEXTS"; + + case MLX5_CMD_OP_CREATE_EQ: + return "CREATE_EQ"; + + case MLX5_CMD_OP_DESTROY_EQ: + return "DESTROY_EQ"; + + case MLX5_CMD_OP_QUERY_EQ: + return "QUERY_EQ"; + + case MLX5_CMD_OP_CREATE_CQ: + return "CREATE_CQ"; + + case MLX5_CMD_OP_DESTROY_CQ: + return "DESTROY_CQ"; + + case MLX5_CMD_OP_QUERY_CQ: + return "QUERY_CQ"; + + case MLX5_CMD_OP_MODIFY_CQ: + return "MODIFY_CQ"; + + case MLX5_CMD_OP_CREATE_QP: + return "CREATE_QP"; + + case MLX5_CMD_OP_DESTROY_QP: + return "DESTROY_QP"; + + case MLX5_CMD_OP_RST2INIT_QP: + return "RST2INIT_QP"; + + case MLX5_CMD_OP_INIT2RTR_QP: + return "INIT2RTR_QP"; + + case MLX5_CMD_OP_RTR2RTS_QP: + return "RTR2RTS_QP"; + + case MLX5_CMD_OP_RTS2RTS_QP: + return "RTS2RTS_QP"; + + case MLX5_CMD_OP_SQERR2RTS_QP: + return "SQERR2RTS_QP"; + + case MLX5_CMD_OP_2ERR_QP: + return "2ERR_QP"; + + case MLX5_CMD_OP_RTS2SQD_QP: + return "RTS2SQD_QP"; + + case MLX5_CMD_OP_SQD2RTS_QP: + return "SQD2RTS_QP"; + + case MLX5_CMD_OP_2RST_QP: + return "2RST_QP"; + + case MLX5_CMD_OP_QUERY_QP: + return "QUERY_QP"; + + case MLX5_CMD_OP_CONF_SQP: + return "CONF_SQP"; + + case MLX5_CMD_OP_MAD_IFC: + return "MAD_IFC"; + + case MLX5_CMD_OP_INIT2INIT_QP: + return "INIT2INIT_QP"; + + case MLX5_CMD_OP_SUSPEND_QP: + return "SUSPEND_QP"; + + case MLX5_CMD_OP_UNSUSPEND_QP: + return "UNSUSPEND_QP"; + + case MLX5_CMD_OP_SQD2SQD_QP: + return "SQD2SQD_QP"; + + case MLX5_CMD_OP_ALLOC_QP_COUNTER_SET: + return "ALLOC_QP_COUNTER_SET"; + + case MLX5_CMD_OP_DEALLOC_QP_COUNTER_SET: + return "DEALLOC_QP_COUNTER_SET"; + + case MLX5_CMD_OP_QUERY_QP_COUNTER_SET: + return "QUERY_QP_COUNTER_SET"; + + case MLX5_CMD_OP_CREATE_PSV: + return "CREATE_PSV"; + + case MLX5_CMD_OP_DESTROY_PSV: + return "DESTROY_PSV"; + + case MLX5_CMD_OP_QUERY_PSV: + return "QUERY_PSV"; + + case MLX5_CMD_OP_QUERY_SIG_RULE_TABLE: + return "QUERY_SIG_RULE_TABLE"; + + case MLX5_CMD_OP_QUERY_BLOCK_SIZE_TABLE: + return "QUERY_BLOCK_SIZE_TABLE"; + + case MLX5_CMD_OP_CREATE_SRQ: + return "CREATE_SRQ"; + + case MLX5_CMD_OP_DESTROY_SRQ: + return "DESTROY_SRQ"; + + case MLX5_CMD_OP_QUERY_SRQ: + return "QUERY_SRQ"; + + case MLX5_CMD_OP_ARM_RQ: + return "ARM_RQ"; + + case MLX5_CMD_OP_RESIZE_SRQ: + return "RESIZE_SRQ"; + + case MLX5_CMD_OP_ALLOC_PD: + return "ALLOC_PD"; + + case MLX5_CMD_OP_DEALLOC_PD: + return "DEALLOC_PD"; + + case MLX5_CMD_OP_ALLOC_UAR: + return "ALLOC_UAR"; + + case MLX5_CMD_OP_DEALLOC_UAR: + return "DEALLOC_UAR"; + + case MLX5_CMD_OP_ATTACH_TO_MCG: + return "ATTACH_TO_MCG"; + + case MLX5_CMD_OP_DETACH_FROM_MCG: + return "DETACH_FROM_MCG"; + + case MLX5_CMD_OP_ALLOC_XRCD: + return "ALLOC_XRCD"; + + case MLX5_CMD_OP_DEALLOC_XRCD: + return "DEALLOC_XRCD"; + + case MLX5_CMD_OP_ACCESS_REG: + return "MLX5_CMD_OP_ACCESS_REG"; + + default: return "unknown command opcode"; + } +} + +static void dump_command(struct mlx5_core_dev *dev, + struct mlx5_cmd_work_ent *ent, int input) +{ + u16 op = be16_to_cpu(((struct mlx5_inbox_hdr *)(ent->lay->in))->opcode); + struct mlx5_cmd_msg *msg = input ? ent->in : ent->out; + struct mlx5_cmd_mailbox *next = msg->next; + int data_only; + int offset = 0; + int dump_len; + + data_only = !!(mlx5_core_debug_mask & (1 << MLX5_CMD_DATA)); + + if (data_only) + mlx5_core_dbg_mask(dev, 1 << MLX5_CMD_DATA, + "dump command data %s(0x%x) %s\n", + mlx5_command_str(op), op, + input ? "INPUT" : "OUTPUT"); + else + mlx5_core_dbg(dev, "dump command %s(0x%x) %s\n", + mlx5_command_str(op), op, + input ? "INPUT" : "OUTPUT"); + + if (data_only) { + if (input) { + dump_buf(ent->lay->in, sizeof(ent->lay->in), 1, offset); + offset += sizeof(ent->lay->in); + } else { + dump_buf(ent->lay->out, sizeof(ent->lay->out), 1, offset); + offset += sizeof(ent->lay->out); + } + } else { + dump_buf(ent->lay, sizeof(*ent->lay), 0, offset); + offset += sizeof(*ent->lay); + } + + while (next && offset < msg->len) { + if (data_only) { + dump_len = min_t(int, MLX5_CMD_DATA_BLOCK_SIZE, msg->len - offset); + dump_buf(next->buf, dump_len, 1, offset); + offset += MLX5_CMD_DATA_BLOCK_SIZE; + } else { + mlx5_core_dbg(dev, "command block:\n"); + dump_buf(next->buf, sizeof(struct mlx5_cmd_prot_block), 0, offset); + offset += sizeof(struct mlx5_cmd_prot_block); + } + next = next->next; + } + + if (data_only) + pr_debug("\n"); +} + +static void cmd_work_handler(struct work_struct *work) +{ + struct mlx5_cmd_work_ent *ent = container_of(work, struct mlx5_cmd_work_ent, work); + struct mlx5_cmd *cmd = ent->cmd; + struct mlx5_core_dev *dev = container_of(cmd, struct mlx5_core_dev, cmd); + struct mlx5_cmd_layout *lay; + struct semaphore *sem; + + sem = ent->page_queue ? &cmd->pages_sem : &cmd->sem; + down(sem); + if (!ent->page_queue) { + ent->idx = alloc_ent(cmd); + if (ent->idx < 0) { + mlx5_core_err(dev, "failed to allocate command entry\n"); + up(sem); + return; + } + } else { + ent->idx = cmd->max_reg_cmds; + } + + ent->token = alloc_token(cmd); + cmd->ent_arr[ent->idx] = ent; + lay = get_inst(cmd, ent->idx); + ent->lay = lay; + memset(lay, 0, sizeof(*lay)); + memcpy(lay->in, ent->in->first.data, sizeof(lay->in)); + if (ent->in->next) + lay->in_ptr = cpu_to_be64(ent->in->next->dma); + lay->inlen = cpu_to_be32(ent->in->len); + if (ent->out->next) + lay->out_ptr = cpu_to_be64(ent->out->next->dma); + lay->outlen = cpu_to_be32(ent->out->len); + lay->type = MLX5_PCI_CMD_XPORT; + lay->token = ent->token; + lay->status_own = CMD_OWNER_HW; + if (!cmd->checksum_disabled) + set_signature(ent); + dump_command(dev, ent, 1); + ktime_get_ts(&ent->ts1); + + /* ring doorbell after the descriptor is valid */ + wmb(); + iowrite32be(1 << ent->idx, &dev->iseg->cmd_dbell); + mlx5_core_dbg(dev, "write 0x%x to command doorbell\n", 1 << ent->idx); + mmiowb(); + if (cmd->mode == CMD_MODE_POLLING) { + poll_timeout(ent); + /* make sure we read the descriptor after ownership is SW */ + rmb(); + mlx5_cmd_comp_handler(dev, 1UL << ent->idx); + } +} + +static const char *deliv_status_to_str(u8 status) +{ + switch (status) { + case MLX5_CMD_DELIVERY_STAT_OK: + return "no errors"; + case MLX5_CMD_DELIVERY_STAT_SIGNAT_ERR: + return "signature error"; + case MLX5_CMD_DELIVERY_STAT_TOK_ERR: + return "token error"; + case MLX5_CMD_DELIVERY_STAT_BAD_BLK_NUM_ERR: + return "bad block number"; + case MLX5_CMD_DELIVERY_STAT_OUT_PTR_ALIGN_ERR: + return "output pointer not aligned to block size"; + case MLX5_CMD_DELIVERY_STAT_IN_PTR_ALIGN_ERR: + return "input pointer not aligned to block size"; + case MLX5_CMD_DELIVERY_STAT_FW_ERR: + return "firmware internal error"; + case MLX5_CMD_DELIVERY_STAT_IN_LENGTH_ERR: + return "command input length error"; + case MLX5_CMD_DELIVERY_STAT_OUT_LENGTH_ERR: + return "command ouput length error"; + case MLX5_CMD_DELIVERY_STAT_RES_FLD_NOT_CLR_ERR: + return "reserved fields not cleared"; + case MLX5_CMD_DELIVERY_STAT_CMD_DESCR_ERR: + return "bad command descriptor type"; + default: + return "unknown status code"; + } +} + +static u16 msg_to_opcode(struct mlx5_cmd_msg *in) +{ + struct mlx5_inbox_hdr *hdr = (struct mlx5_inbox_hdr *)(in->first.data); + + return be16_to_cpu(hdr->opcode); +} + +static int wait_func(struct mlx5_core_dev *dev, struct mlx5_cmd_work_ent *ent) +{ + unsigned long timeout = msecs_to_jiffies(MLX5_CMD_TIMEOUT_MSEC); + struct mlx5_cmd *cmd = &dev->cmd; + int err; + + if (cmd->mode == CMD_MODE_POLLING) { + wait_for_completion(&ent->done); + err = ent->ret; + } else { + if (!wait_for_completion_timeout(&ent->done, timeout)) + err = -ETIMEDOUT; + else + err = 0; + } + if (err == -ETIMEDOUT) { + mlx5_core_warn(dev, "%s(0x%x) timeout. Will cause a leak of a command resource\n", + mlx5_command_str(msg_to_opcode(ent->in)), + msg_to_opcode(ent->in)); + } + mlx5_core_dbg(dev, "err %d, delivery status %s(%d)\n", err, + deliv_status_to_str(ent->status), ent->status); + + return err; +} + +/* Notes: + * 1. Callback functions may not sleep + * 2. page queue commands do not support asynchrous completion + */ +static int mlx5_cmd_invoke(struct mlx5_core_dev *dev, struct mlx5_cmd_msg *in, + struct mlx5_cmd_msg *out, mlx5_cmd_cbk_t callback, + void *context, int page_queue, u8 *status) +{ + struct mlx5_cmd *cmd = &dev->cmd; + struct mlx5_cmd_work_ent *ent; + ktime_t t1, t2, delta; + struct mlx5_cmd_stats *stats; + int err = 0; + s64 ds; + u16 op; + + if (callback && page_queue) + return -EINVAL; + + ent = alloc_cmd(cmd, in, out, callback, context, page_queue); + if (IS_ERR(ent)) + return PTR_ERR(ent); + + if (!callback) + init_completion(&ent->done); + + INIT_WORK(&ent->work, cmd_work_handler); + if (page_queue) { + cmd_work_handler(&ent->work); + } else if (!queue_work(cmd->wq, &ent->work)) { + mlx5_core_warn(dev, "failed to queue work\n"); + err = -ENOMEM; + goto out_free; + } + + if (!callback) { + err = wait_func(dev, ent); + if (err == -ETIMEDOUT) + goto out; + + t1 = timespec_to_ktime(ent->ts1); + t2 = timespec_to_ktime(ent->ts2); + delta = ktime_sub(t2, t1); + ds = ktime_to_ns(delta); + op = be16_to_cpu(((struct mlx5_inbox_hdr *)in->first.data)->opcode); + if (op < ARRAY_SIZE(cmd->stats)) { + stats = &cmd->stats[op]; + spin_lock(&stats->lock); + stats->sum += ds; + ++stats->n; + spin_unlock(&stats->lock); + } + mlx5_core_dbg_mask(dev, 1 << MLX5_CMD_TIME, + "fw exec time for %s is %lld nsec\n", + mlx5_command_str(op), ds); + *status = ent->status; + free_cmd(ent); + } + + return err; + +out_free: + free_cmd(ent); +out: + return err; +} + +static ssize_t dbg_write(struct file *filp, const char __user *buf, + size_t count, loff_t *pos) +{ + struct mlx5_core_dev *dev = filp->private_data; + struct mlx5_cmd_debug *dbg = &dev->cmd.dbg; + char lbuf[3]; + int err; + + if (!dbg->in_msg || !dbg->out_msg) + return -ENOMEM; + + if (copy_from_user(lbuf, buf, sizeof(lbuf))) + return -EPERM; + + lbuf[sizeof(lbuf) - 1] = 0; + + if (strcmp(lbuf, "go")) + return -EINVAL; + + err = mlx5_cmd_exec(dev, dbg->in_msg, dbg->inlen, dbg->out_msg, dbg->outlen); + + return err ? err : count; +} + + +static const struct file_operations fops = { + .owner = THIS_MODULE, + .open = simple_open, + .write = dbg_write, +}; + +static int mlx5_copy_to_msg(struct mlx5_cmd_msg *to, void *from, int size) +{ + struct mlx5_cmd_prot_block *block; + struct mlx5_cmd_mailbox *next; + int copy; + + if (!to || !from) + return -ENOMEM; + + copy = min_t(int, size, sizeof(to->first.data)); + memcpy(to->first.data, from, copy); + size -= copy; + from += copy; + + next = to->next; + while (size) { + if (!next) { + /* this is a BUG */ + return -ENOMEM; + } + + copy = min_t(int, size, MLX5_CMD_DATA_BLOCK_SIZE); + block = next->buf; + memcpy(block->data, from, copy); + from += copy; + size -= copy; + next = next->next; + } + + return 0; +} + +static int mlx5_copy_from_msg(void *to, struct mlx5_cmd_msg *from, int size) +{ + struct mlx5_cmd_prot_block *block; + struct mlx5_cmd_mailbox *next; + int copy; + + if (!to || !from) + return -ENOMEM; + + copy = min_t(int, size, sizeof(from->first.data)); + memcpy(to, from->first.data, copy); + size -= copy; + to += copy; + + next = from->next; + while (size) { + if (!next) { + /* this is a BUG */ + return -ENOMEM; + } + + copy = min_t(int, size, MLX5_CMD_DATA_BLOCK_SIZE); + block = next->buf; + if (xor8_buf(block, sizeof(*block)) != 0xff) + return -EINVAL; + + memcpy(to, block->data, copy); + to += copy; + size -= copy; + next = next->next; + } + + return 0; +} + +static struct mlx5_cmd_mailbox *alloc_cmd_box(struct mlx5_core_dev *dev, + gfp_t flags) +{ + struct mlx5_cmd_mailbox *mailbox; + + mailbox = kmalloc(sizeof(*mailbox), flags); + if (!mailbox) + return ERR_PTR(-ENOMEM); + + mailbox->buf = pci_pool_alloc(dev->cmd.pool, flags, + &mailbox->dma); + if (!mailbox->buf) { + mlx5_core_dbg(dev, "failed allocation\n"); + kfree(mailbox); + return ERR_PTR(-ENOMEM); + } + memset(mailbox->buf, 0, sizeof(struct mlx5_cmd_prot_block)); + mailbox->next = NULL; + + return mailbox; +} + +static void free_cmd_box(struct mlx5_core_dev *dev, + struct mlx5_cmd_mailbox *mailbox) +{ + pci_pool_free(dev->cmd.pool, mailbox->buf, mailbox->dma); + kfree(mailbox); +} + +static struct mlx5_cmd_msg *mlx5_alloc_cmd_msg(struct mlx5_core_dev *dev, + gfp_t flags, int size) +{ + struct mlx5_cmd_mailbox *tmp, *head = NULL; + struct mlx5_cmd_prot_block *block; + struct mlx5_cmd_msg *msg; + int blen; + int err; + int n; + int i; + + msg = kzalloc(sizeof(*msg), GFP_KERNEL); + if (!msg) + return ERR_PTR(-ENOMEM); + + blen = size - min_t(int, sizeof(msg->first.data), size); + n = (blen + MLX5_CMD_DATA_BLOCK_SIZE - 1) / MLX5_CMD_DATA_BLOCK_SIZE; + + for (i = 0; i < n; i++) { + tmp = alloc_cmd_box(dev, flags); + if (IS_ERR(tmp)) { + mlx5_core_warn(dev, "failed allocating block\n"); + err = PTR_ERR(tmp); + goto err_alloc; + } + + block = tmp->buf; + tmp->next = head; + block->next = cpu_to_be64(tmp->next ? tmp->next->dma : 0); + block->block_num = cpu_to_be32(n - i - 1); + head = tmp; + } + msg->next = head; + msg->len = size; + return msg; + +err_alloc: + while (head) { + tmp = head->next; + free_cmd_box(dev, head); + head = tmp; + } + kfree(msg); + + return ERR_PTR(err); +} + +static void mlx5_free_cmd_msg(struct mlx5_core_dev *dev, + struct mlx5_cmd_msg *msg) +{ + struct mlx5_cmd_mailbox *head = msg->next; + struct mlx5_cmd_mailbox *next; + + while (head) { + next = head->next; + free_cmd_box(dev, head); + head = next; + } + kfree(msg); +} + +static ssize_t data_write(struct file *filp, const char __user *buf, + size_t count, loff_t *pos) +{ + struct mlx5_core_dev *dev = filp->private_data; + struct mlx5_cmd_debug *dbg = &dev->cmd.dbg; + void *ptr; + int err; + + if (*pos != 0) + return -EINVAL; + + kfree(dbg->in_msg); + dbg->in_msg = NULL; + dbg->inlen = 0; + + ptr = kzalloc(count, GFP_KERNEL); + if (!ptr) + return -ENOMEM; + + if (copy_from_user(ptr, buf, count)) { + err = -EPERM; + goto out; + } + dbg->in_msg = ptr; + dbg->inlen = count; + + *pos = count; + + return count; + +out: + kfree(ptr); + return err; +} + +static ssize_t data_read(struct file *filp, char __user *buf, size_t count, + loff_t *pos) +{ + struct mlx5_core_dev *dev = filp->private_data; + struct mlx5_cmd_debug *dbg = &dev->cmd.dbg; + int copy; + + if (*pos) + return 0; + + if (!dbg->out_msg) + return -ENOMEM; + + copy = min_t(int, count, dbg->outlen); + if (copy_to_user(buf, dbg->out_msg, copy)) + return -EPERM; + + *pos += copy; + + return copy; +} + +static const struct file_operations dfops = { + .owner = THIS_MODULE, + .open = simple_open, + .write = data_write, + .read = data_read, +}; + +static ssize_t outlen_read(struct file *filp, char __user *buf, size_t count, + loff_t *pos) +{ + struct mlx5_core_dev *dev = filp->private_data; + struct mlx5_cmd_debug *dbg = &dev->cmd.dbg; + char outlen[8]; + int err; + + if (*pos) + return 0; + + err = snprintf(outlen, sizeof(outlen), "%d", dbg->outlen); + if (err < 0) + return err; + + if (copy_to_user(buf, &outlen, err)) + return -EPERM; + + *pos += err; + + return err; +} + +static ssize_t outlen_write(struct file *filp, const char __user *buf, + size_t count, loff_t *pos) +{ + struct mlx5_core_dev *dev = filp->private_data; + struct mlx5_cmd_debug *dbg = &dev->cmd.dbg; + char outlen_str[8]; + int outlen; + void *ptr; + int err; + + if (*pos != 0 || count > 6) + return -EINVAL; + + kfree(dbg->out_msg); + dbg->out_msg = NULL; + dbg->outlen = 0; + + if (copy_from_user(outlen_str, buf, count)) + return -EPERM; + + outlen_str[7] = 0; + + err = sscanf(outlen_str, "%d", &outlen); + if (err < 0) + return err; + + ptr = kzalloc(outlen, GFP_KERNEL); + if (!ptr) + return -ENOMEM; + + dbg->out_msg = ptr; + dbg->outlen = outlen; + + *pos = count; + + return count; +} + +static const struct file_operations olfops = { + .owner = THIS_MODULE, + .open = simple_open, + .write = outlen_write, + .read = outlen_read, +}; + +static void set_wqname(struct mlx5_core_dev *dev) +{ + struct mlx5_cmd *cmd = &dev->cmd; + + snprintf(cmd->wq_name, sizeof(cmd->wq_name), "mlx5_cmd_%s", + dev_name(&dev->pdev->dev)); +} + +static void clean_debug_files(struct mlx5_core_dev *dev) +{ + struct mlx5_cmd_debug *dbg = &dev->cmd.dbg; + + if (!mlx5_debugfs_root) + return; + + mlx5_cmdif_debugfs_cleanup(dev); + debugfs_remove_recursive(dbg->dbg_root); +} + +static int create_debugfs_files(struct mlx5_core_dev *dev) +{ + struct mlx5_cmd_debug *dbg = &dev->cmd.dbg; + int err = -ENOMEM; + + if (!mlx5_debugfs_root) + return 0; + + dbg->dbg_root = debugfs_create_dir("cmd", dev->priv.dbg_root); + if (!dbg->dbg_root) + return err; + + dbg->dbg_in = debugfs_create_file("in", 0400, dbg->dbg_root, + dev, &dfops); + if (!dbg->dbg_in) + goto err_dbg; + + dbg->dbg_out = debugfs_create_file("out", 0200, dbg->dbg_root, + dev, &dfops); + if (!dbg->dbg_out) + goto err_dbg; + + dbg->dbg_outlen = debugfs_create_file("out_len", 0600, dbg->dbg_root, + dev, &olfops); + if (!dbg->dbg_outlen) + goto err_dbg; + + dbg->dbg_status = debugfs_create_u8("status", 0600, dbg->dbg_root, + &dbg->status); + if (!dbg->dbg_status) + goto err_dbg; + + dbg->dbg_run = debugfs_create_file("run", 0200, dbg->dbg_root, dev, &fops); + if (!dbg->dbg_run) + goto err_dbg; + + mlx5_cmdif_debugfs_init(dev); + + return 0; + +err_dbg: + clean_debug_files(dev); + return err; +} + +void mlx5_cmd_use_events(struct mlx5_core_dev *dev) +{ + struct mlx5_cmd *cmd = &dev->cmd; + int i; + + for (i = 0; i < cmd->max_reg_cmds; i++) + down(&cmd->sem); + + down(&cmd->pages_sem); + + flush_workqueue(cmd->wq); + + cmd->mode = CMD_MODE_EVENTS; + + up(&cmd->pages_sem); + for (i = 0; i < cmd->max_reg_cmds; i++) + up(&cmd->sem); +} + +void mlx5_cmd_use_polling(struct mlx5_core_dev *dev) +{ + struct mlx5_cmd *cmd = &dev->cmd; + int i; + + for (i = 0; i < cmd->max_reg_cmds; i++) + down(&cmd->sem); + + down(&cmd->pages_sem); + + flush_workqueue(cmd->wq); + cmd->mode = CMD_MODE_POLLING; + + up(&cmd->pages_sem); + for (i = 0; i < cmd->max_reg_cmds; i++) + up(&cmd->sem); +} + +void mlx5_cmd_comp_handler(struct mlx5_core_dev *dev, unsigned long vector) +{ + struct mlx5_cmd *cmd = &dev->cmd; + struct mlx5_cmd_work_ent *ent; + mlx5_cmd_cbk_t callback; + void *context; + int err; + int i; + + for (i = 0; i < (1 << cmd->log_sz); i++) { + if (test_bit(i, &vector)) { + ent = cmd->ent_arr[i]; + ktime_get_ts(&ent->ts2); + memcpy(ent->out->first.data, ent->lay->out, sizeof(ent->lay->out)); + dump_command(dev, ent, 0); + if (!ent->ret) { + if (!cmd->checksum_disabled) + ent->ret = verify_signature(ent); + else + ent->ret = 0; + ent->status = ent->lay->status_own >> 1; + mlx5_core_dbg(dev, "command completed. ret 0x%x, delivery status %s(0x%x)\n", + ent->ret, deliv_status_to_str(ent->status), ent->status); + } + free_ent(cmd, ent->idx); + if (ent->callback) { + callback = ent->callback; + context = ent->context; + err = ent->ret; + free_cmd(ent); + callback(err, context); + } else { + complete(&ent->done); + } + if (ent->page_queue) + up(&cmd->pages_sem); + else + up(&cmd->sem); + } + } +} +EXPORT_SYMBOL(mlx5_cmd_comp_handler); + +static int status_to_err(u8 status) +{ + return status ? -1 : 0; /* TBD more meaningful codes */ +} + +static struct mlx5_cmd_msg *alloc_msg(struct mlx5_core_dev *dev, int in_size) +{ + struct mlx5_cmd_msg *msg = ERR_PTR(-ENOMEM); + struct mlx5_cmd *cmd = &dev->cmd; + struct cache_ent *ent = NULL; + + if (in_size > MED_LIST_SIZE && in_size <= LONG_LIST_SIZE) + ent = &cmd->cache.large; + else if (in_size > 16 && in_size <= MED_LIST_SIZE) + ent = &cmd->cache.med; + + if (ent) { + spin_lock(&ent->lock); + if (!list_empty(&ent->head)) { + msg = list_entry(ent->head.next, typeof(*msg), list); + /* For cached lists, we must explicitly state what is + * the real size + */ + msg->len = in_size; + list_del(&msg->list); + } + spin_unlock(&ent->lock); + } + + if (IS_ERR(msg)) + msg = mlx5_alloc_cmd_msg(dev, GFP_KERNEL, in_size); + + return msg; +} + +static void free_msg(struct mlx5_core_dev *dev, struct mlx5_cmd_msg *msg) +{ + if (msg->cache) { + spin_lock(&msg->cache->lock); + list_add_tail(&msg->list, &msg->cache->head); + spin_unlock(&msg->cache->lock); + } else { + mlx5_free_cmd_msg(dev, msg); + } +} + +static int is_manage_pages(struct mlx5_inbox_hdr *in) +{ + return be16_to_cpu(in->opcode) == MLX5_CMD_OP_MANAGE_PAGES; +} + +int mlx5_cmd_exec(struct mlx5_core_dev *dev, void *in, int in_size, void *out, + int out_size) +{ + struct mlx5_cmd_msg *inb; + struct mlx5_cmd_msg *outb; + int pages_queue; + int err; + u8 status = 0; + + pages_queue = is_manage_pages(in); + + inb = alloc_msg(dev, in_size); + if (IS_ERR(inb)) { + err = PTR_ERR(inb); + return err; + } + + err = mlx5_copy_to_msg(inb, in, in_size); + if (err) { + mlx5_core_warn(dev, "err %d\n", err); + goto out_in; + } + + outb = mlx5_alloc_cmd_msg(dev, GFP_KERNEL, out_size); + if (IS_ERR(outb)) { + err = PTR_ERR(outb); + goto out_in; + } + + err = mlx5_cmd_invoke(dev, inb, outb, NULL, NULL, pages_queue, &status); + if (err) + goto out_out; + + mlx5_core_dbg(dev, "err %d, status %d\n", err, status); + if (status) { + err = status_to_err(status); + goto out_out; + } + + err = mlx5_copy_from_msg(out, outb, out_size); + +out_out: + mlx5_free_cmd_msg(dev, outb); + +out_in: + free_msg(dev, inb); + return err; +} +EXPORT_SYMBOL(mlx5_cmd_exec); + +static void destroy_msg_cache(struct mlx5_core_dev *dev) +{ + struct mlx5_cmd *cmd = &dev->cmd; + struct mlx5_cmd_msg *msg; + struct mlx5_cmd_msg *n; + + list_for_each_entry_safe(msg, n, &cmd->cache.large.head, list) { + list_del(&msg->list); + mlx5_free_cmd_msg(dev, msg); + } + + list_for_each_entry_safe(msg, n, &cmd->cache.med.head, list) { + list_del(&msg->list); + mlx5_free_cmd_msg(dev, msg); + } +} + +static int create_msg_cache(struct mlx5_core_dev *dev) +{ + struct mlx5_cmd *cmd = &dev->cmd; + struct mlx5_cmd_msg *msg; + int err; + int i; + + spin_lock_init(&cmd->cache.large.lock); + INIT_LIST_HEAD(&cmd->cache.large.head); + spin_lock_init(&cmd->cache.med.lock); + INIT_LIST_HEAD(&cmd->cache.med.head); + + for (i = 0; i < NUM_LONG_LISTS; i++) { + msg = mlx5_alloc_cmd_msg(dev, GFP_KERNEL, LONG_LIST_SIZE); + if (IS_ERR(msg)) { + err = PTR_ERR(msg); + goto ex_err; + } + msg->cache = &cmd->cache.large; + list_add_tail(&msg->list, &cmd->cache.large.head); + } + + for (i = 0; i < NUM_MED_LISTS; i++) { + msg = mlx5_alloc_cmd_msg(dev, GFP_KERNEL, MED_LIST_SIZE); + if (IS_ERR(msg)) { + err = PTR_ERR(msg); + goto ex_err; + } + msg->cache = &cmd->cache.med; + list_add_tail(&msg->list, &cmd->cache.med.head); + } + + return 0; + +ex_err: + destroy_msg_cache(dev); + return err; +} + +int mlx5_cmd_init(struct mlx5_core_dev *dev) +{ + int size = sizeof(struct mlx5_cmd_prot_block); + int align = roundup_pow_of_two(size); + struct mlx5_cmd *cmd = &dev->cmd; + u32 cmd_h, cmd_l; + u16 cmd_if_rev; + int err; + int i; + + cmd_if_rev = cmdif_rev(dev); + if (cmd_if_rev != CMD_IF_REV) { + dev_err(&dev->pdev->dev, + "Driver cmdif rev(%d) differs from firmware's(%d)\n", + CMD_IF_REV, cmd_if_rev); + return -EINVAL; + } + + cmd->pool = pci_pool_create("mlx5_cmd", dev->pdev, size, align, 0); + if (!cmd->pool) + return -ENOMEM; + + cmd->cmd_buf = (void *)__get_free_pages(GFP_ATOMIC, 0); + if (!cmd->cmd_buf) { + err = -ENOMEM; + goto err_free_pool; + } + cmd->dma = dma_map_single(&dev->pdev->dev, cmd->cmd_buf, PAGE_SIZE, + DMA_BIDIRECTIONAL); + if (dma_mapping_error(&dev->pdev->dev, cmd->dma)) { + err = -ENOMEM; + goto err_free; + } + + cmd_l = ioread32be(&dev->iseg->cmdq_addr_l_sz) & 0xff; + cmd->log_sz = cmd_l >> 4 & 0xf; + cmd->log_stride = cmd_l & 0xf; + if (1 << cmd->log_sz > MLX5_MAX_COMMANDS) { + dev_err(&dev->pdev->dev, "firmware reports too many outstanding commands %d\n", + 1 << cmd->log_sz); + err = -EINVAL; + goto err_map; + } + + if (cmd->log_sz + cmd->log_stride > PAGE_SHIFT) { + dev_err(&dev->pdev->dev, "command queue size overflow\n"); + err = -EINVAL; + goto err_map; + } + + cmd->max_reg_cmds = (1 << cmd->log_sz) - 1; + cmd->bitmask = (1 << cmd->max_reg_cmds) - 1; + + cmd->cmdif_rev = ioread32be(&dev->iseg->cmdif_rev_fw_sub) >> 16; + if (cmd->cmdif_rev > CMD_IF_REV) { + dev_err(&dev->pdev->dev, "driver does not support command interface version. driver %d, firmware %d\n", + CMD_IF_REV, cmd->cmdif_rev); + err = -ENOTSUPP; + goto err_map; + } + + spin_lock_init(&cmd->alloc_lock); + spin_lock_init(&cmd->token_lock); + for (i = 0; i < ARRAY_SIZE(cmd->stats); i++) + spin_lock_init(&cmd->stats[i].lock); + + sema_init(&cmd->sem, cmd->max_reg_cmds); + sema_init(&cmd->pages_sem, 1); + + cmd_h = (u32)((u64)(cmd->dma) >> 32); + cmd_l = (u32)(cmd->dma); + if (cmd_l & 0xfff) { + dev_err(&dev->pdev->dev, "invalid command queue address\n"); + err = -ENOMEM; + goto err_map; + } + + iowrite32be(cmd_h, &dev->iseg->cmdq_addr_h); + iowrite32be(cmd_l, &dev->iseg->cmdq_addr_l_sz); + + /* Make sure firmware sees the complete address before we proceed */ + wmb(); + + mlx5_core_dbg(dev, "descriptor at dma 0x%llx\n", (unsigned long long)(cmd->dma)); + + cmd->mode = CMD_MODE_POLLING; + + err = create_msg_cache(dev); + if (err) { + dev_err(&dev->pdev->dev, "failed to create command cache\n"); + goto err_map; + } + + set_wqname(dev); + cmd->wq = create_singlethread_workqueue(cmd->wq_name); + if (!cmd->wq) { + dev_err(&dev->pdev->dev, "failed to create command workqueue\n"); + err = -ENOMEM; + goto err_cache; + } + + err = create_debugfs_files(dev); + if (err) { + err = -ENOMEM; + goto err_wq; + } + + return 0; + +err_wq: + destroy_workqueue(cmd->wq); + +err_cache: + destroy_msg_cache(dev); + +err_map: + dma_unmap_single(&dev->pdev->dev, cmd->dma, PAGE_SIZE, + DMA_BIDIRECTIONAL); +err_free: + free_pages((unsigned long)cmd->cmd_buf, 0); + +err_free_pool: + pci_pool_destroy(cmd->pool); + + return err; +} +EXPORT_SYMBOL(mlx5_cmd_init); + +void mlx5_cmd_cleanup(struct mlx5_core_dev *dev) +{ + struct mlx5_cmd *cmd = &dev->cmd; + + clean_debug_files(dev); + destroy_workqueue(cmd->wq); + destroy_msg_cache(dev); + dma_unmap_single(&dev->pdev->dev, cmd->dma, PAGE_SIZE, + DMA_BIDIRECTIONAL); + free_pages((unsigned long)cmd->cmd_buf, 0); + pci_pool_destroy(cmd->pool); +} +EXPORT_SYMBOL(mlx5_cmd_cleanup); + +static const char *cmd_status_str(u8 status) +{ + switch (status) { + case MLX5_CMD_STAT_OK: + return "OK"; + case MLX5_CMD_STAT_INT_ERR: + return "internal error"; + case MLX5_CMD_STAT_BAD_OP_ERR: + return "bad operation"; + case MLX5_CMD_STAT_BAD_PARAM_ERR: + return "bad parameter"; + case MLX5_CMD_STAT_BAD_SYS_STATE_ERR: + return "bad system state"; + case MLX5_CMD_STAT_BAD_RES_ERR: + return "bad resource"; + case MLX5_CMD_STAT_RES_BUSY: + return "resource busy"; + case MLX5_CMD_STAT_LIM_ERR: + return "limits exceeded"; + case MLX5_CMD_STAT_BAD_RES_STATE_ERR: + return "bad resource state"; + case MLX5_CMD_STAT_IX_ERR: + return "bad index"; + case MLX5_CMD_STAT_NO_RES_ERR: + return "no resources"; + case MLX5_CMD_STAT_BAD_INP_LEN_ERR: + return "bad input length"; + case MLX5_CMD_STAT_BAD_OUTP_LEN_ERR: + return "bad output length"; + case MLX5_CMD_STAT_BAD_QP_STATE_ERR: + return "bad QP state"; + case MLX5_CMD_STAT_BAD_PKT_ERR: + return "bad packet (discarded)"; + case MLX5_CMD_STAT_BAD_SIZE_OUTS_CQES_ERR: + return "bad size too many outstanding CQEs"; + default: + return "unknown status"; + } +} + +int mlx5_cmd_status_to_err(struct mlx5_outbox_hdr *hdr) +{ + if (!hdr->status) + return 0; + + pr_warn("command failed, status %s(0x%x), syndrome 0x%x\n", + cmd_status_str(hdr->status), hdr->status, + be32_to_cpu(hdr->syndrome)); + + switch (hdr->status) { + case MLX5_CMD_STAT_OK: return 0; + case MLX5_CMD_STAT_INT_ERR: return -EIO; + case MLX5_CMD_STAT_BAD_OP_ERR: return -EINVAL; + case MLX5_CMD_STAT_BAD_PARAM_ERR: return -EINVAL; + case MLX5_CMD_STAT_BAD_SYS_STATE_ERR: return -EIO; + case MLX5_CMD_STAT_BAD_RES_ERR: return -EINVAL; + case MLX5_CMD_STAT_RES_BUSY: return -EBUSY; + case MLX5_CMD_STAT_LIM_ERR: return -EINVAL; + case MLX5_CMD_STAT_BAD_RES_STATE_ERR: return -EINVAL; + case MLX5_CMD_STAT_IX_ERR: return -EINVAL; + case MLX5_CMD_STAT_NO_RES_ERR: return -EAGAIN; + case MLX5_CMD_STAT_BAD_INP_LEN_ERR: return -EIO; + case MLX5_CMD_STAT_BAD_OUTP_LEN_ERR: return -EIO; + case MLX5_CMD_STAT_BAD_QP_STATE_ERR: return -EINVAL; + case MLX5_CMD_STAT_BAD_PKT_ERR: return -EINVAL; + case MLX5_CMD_STAT_BAD_SIZE_OUTS_CQES_ERR: return -EINVAL; + default: return -EIO; + } +} diff --git a/drivers/net/ethernet/mellanox/mlx5/core/cq.c b/drivers/net/ethernet/mellanox/mlx5/core/cq.c new file mode 100644 index 000000000000..c2d660be6f76 --- /dev/null +++ b/drivers/net/ethernet/mellanox/mlx5/core/cq.c @@ -0,0 +1,224 @@ +/* + * Copyright (c) 2013, Mellanox Technologies inc. All rights reserved. + * + * This software is available to you under a choice of one of two + * licenses. You may choose to be licensed under the terms of the GNU + * General Public License (GPL) Version 2, available from the file + * COPYING in the main directory of this source tree, or the + * OpenIB.org BSD license below: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * - Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * - Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/hardirq.h> +#include <linux/mlx5/driver.h> +#include <linux/mlx5/cmd.h> +#include <rdma/ib_verbs.h> +#include <linux/mlx5/cq.h> +#include "mlx5_core.h" + +void mlx5_cq_completion(struct mlx5_core_dev *dev, u32 cqn) +{ + struct mlx5_core_cq *cq; + struct mlx5_cq_table *table = &dev->priv.cq_table; + + spin_lock(&table->lock); + cq = radix_tree_lookup(&table->tree, cqn); + if (likely(cq)) + atomic_inc(&cq->refcount); + spin_unlock(&table->lock); + + if (!cq) { + mlx5_core_warn(dev, "Completion event for bogus CQ 0x%x\n", cqn); + return; + } + + ++cq->arm_sn; + + cq->comp(cq); + + if (atomic_dec_and_test(&cq->refcount)) + complete(&cq->free); +} + +void mlx5_cq_event(struct mlx5_core_dev *dev, u32 cqn, int event_type) +{ + struct mlx5_cq_table *table = &dev->priv.cq_table; + struct mlx5_core_cq *cq; + + spin_lock(&table->lock); + + cq = radix_tree_lookup(&table->tree, cqn); + if (cq) + atomic_inc(&cq->refcount); + + spin_unlock(&table->lock); + + if (!cq) { + mlx5_core_warn(dev, "Async event for bogus CQ 0x%x\n", cqn); + return; + } + + cq->event(cq, event_type); + + if (atomic_dec_and_test(&cq->refcount)) + complete(&cq->free); +} + + +int mlx5_core_create_cq(struct mlx5_core_dev *dev, struct mlx5_core_cq *cq, + struct mlx5_create_cq_mbox_in *in, int inlen) +{ + int err; + struct mlx5_cq_table *table = &dev->priv.cq_table; + struct mlx5_create_cq_mbox_out out; + struct mlx5_destroy_cq_mbox_in din; + struct mlx5_destroy_cq_mbox_out dout; + + in->hdr.opcode = cpu_to_be16(MLX5_CMD_OP_CREATE_CQ); + memset(&out, 0, sizeof(out)); + err = mlx5_cmd_exec(dev, in, inlen, &out, sizeof(out)); + if (err) + return err; + + if (out.hdr.status) + return mlx5_cmd_status_to_err(&out.hdr); + + cq->cqn = be32_to_cpu(out.cqn) & 0xffffff; + cq->cons_index = 0; + cq->arm_sn = 0; + atomic_set(&cq->refcount, 1); + init_completion(&cq->free); + + spin_lock_irq(&table->lock); + err = radix_tree_insert(&table->tree, cq->cqn, cq); + spin_unlock_irq(&table->lock); + if (err) + goto err_cmd; + + cq->pid = current->pid; + err = mlx5_debug_cq_add(dev, cq); + if (err) + mlx5_core_dbg(dev, "failed adding CP 0x%x to debug file system\n", + cq->cqn); + + return 0; + +err_cmd: + memset(&din, 0, sizeof(din)); + memset(&dout, 0, sizeof(dout)); + din.hdr.opcode = cpu_to_be16(MLX5_CMD_OP_DESTROY_CQ); + mlx5_cmd_exec(dev, &din, sizeof(din), &dout, sizeof(dout)); + return err; +} +EXPORT_SYMBOL(mlx5_core_create_cq); + +int mlx5_core_destroy_cq(struct mlx5_core_dev *dev, struct mlx5_core_cq *cq) +{ + struct mlx5_cq_table *table = &dev->priv.cq_table; + struct mlx5_destroy_cq_mbox_in in; + struct mlx5_destroy_cq_mbox_out out; + struct mlx5_core_cq *tmp; + int err; + + spin_lock_irq(&table->lock); + tmp = radix_tree_delete(&table->tree, cq->cqn); + spin_unlock_irq(&table->lock); + if (!tmp) { + mlx5_core_warn(dev, "cq 0x%x not found in tree\n", cq->cqn); + return -EINVAL; + } + if (tmp != cq) { + mlx5_core_warn(dev, "corruption on srqn 0x%x\n", cq->cqn); + return -EINVAL; + } + + memset(&in, 0, sizeof(in)); + memset(&out, 0, sizeof(out)); + in.hdr.opcode = cpu_to_be16(MLX5_CMD_OP_DESTROY_CQ); + in.cqn = cpu_to_be32(cq->cqn); + err = mlx5_cmd_exec(dev, &in, sizeof(in), &out, sizeof(out)); + if (err) + return err; + + if (out.hdr.status) + return mlx5_cmd_status_to_err(&out.hdr); + + synchronize_irq(cq->irqn); + + mlx5_debug_cq_remove(dev, cq); + if (atomic_dec_and_test(&cq->refcount)) + complete(&cq->free); + wait_for_completion(&cq->free); + + return 0; +} +EXPORT_SYMBOL(mlx5_core_destroy_cq); + +int mlx5_core_query_cq(struct mlx5_core_dev *dev, struct mlx5_core_cq *cq, + struct mlx5_query_cq_mbox_out *out) +{ + struct mlx5_query_cq_mbox_in in; + int err; + + memset(&in, 0, sizeof(in)); + memset(out, 0, sizeof(*out)); + + in.hdr.opcode = cpu_to_be16(MLX5_CMD_OP_QUERY_CQ); + in.cqn = cpu_to_be32(cq->cqn); + err = mlx5_cmd_exec(dev, &in, sizeof(in), out, sizeof(*out)); + if (err) + return err; + + if (out->hdr.status) + return mlx5_cmd_status_to_err(&out->hdr); + + return err; +} +EXPORT_SYMBOL(mlx5_core_query_cq); + + +int mlx5_core_modify_cq(struct mlx5_core_dev *dev, struct mlx5_core_cq *cq, + int type, struct mlx5_cq_modify_params *params) +{ + return -ENOSYS; +} + +int mlx5_init_cq_table(struct mlx5_core_dev *dev) +{ + struct mlx5_cq_table *table = &dev->priv.cq_table; + int err; + + spin_lock_init(&table->lock); + INIT_RADIX_TREE(&table->tree, GFP_ATOMIC); + err = mlx5_cq_debugfs_init(dev); + + return err; +} + +void mlx5_cleanup_cq_table(struct mlx5_core_dev *dev) +{ + mlx5_cq_debugfs_cleanup(dev); +} diff --git a/drivers/net/ethernet/mellanox/mlx5/core/debugfs.c b/drivers/net/ethernet/mellanox/mlx5/core/debugfs.c new file mode 100644 index 000000000000..5e9cf2b9aaf7 --- /dev/null +++ b/drivers/net/ethernet/mellanox/mlx5/core/debugfs.c @@ -0,0 +1,587 @@ +/* + * Copyright (c) 2013, Mellanox Technologies inc. All rights reserved. + * + * This software is available to you under a choice of one of two + * licenses. You may choose to be licensed under the terms of the GNU + * General Public License (GPL) Version 2, available from the file + * COPYING in the main directory of this source tree, or the + * OpenIB.org BSD license below: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * - Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * - Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +#include <linux/module.h> +#include <linux/debugfs.h> +#include <linux/mlx5/qp.h> +#include <linux/mlx5/cq.h> +#include <linux/mlx5/driver.h> +#include "mlx5_core.h" + +enum { + QP_PID, + QP_STATE, + QP_XPORT, + QP_MTU, + QP_N_RECV, + QP_RECV_SZ, + QP_N_SEND, + QP_LOG_PG_SZ, + QP_RQPN, +}; + +static char *qp_fields[] = { + [QP_PID] = "pid", + [QP_STATE] = "state", + [QP_XPORT] = "transport", + [QP_MTU] = "mtu", + [QP_N_RECV] = "num_recv", + [QP_RECV_SZ] = "rcv_wqe_sz", + [QP_N_SEND] = "num_send", + [QP_LOG_PG_SZ] = "log2_page_sz", + [QP_RQPN] = "remote_qpn", +}; + +enum { + EQ_NUM_EQES, + EQ_INTR, + EQ_LOG_PG_SZ, +}; + +static char *eq_fields[] = { + [EQ_NUM_EQES] = "num_eqes", + [EQ_INTR] = "intr", + [EQ_LOG_PG_SZ] = "log_page_size", +}; + +enum { + CQ_PID, + CQ_NUM_CQES, + CQ_LOG_PG_SZ, +}; + +static char *cq_fields[] = { + [CQ_PID] = "pid", + [CQ_NUM_CQES] = "num_cqes", + [CQ_LOG_PG_SZ] = "log_page_size", +}; + +struct dentry *mlx5_debugfs_root; +EXPORT_SYMBOL(mlx5_debugfs_root); + +void mlx5_register_debugfs(void) +{ + mlx5_debugfs_root = debugfs_create_dir("mlx5", NULL); + if (IS_ERR_OR_NULL(mlx5_debugfs_root)) + mlx5_debugfs_root = NULL; +} + +void mlx5_unregister_debugfs(void) +{ + debugfs_remove(mlx5_debugfs_root); +} + +int mlx5_qp_debugfs_init(struct mlx5_core_dev *dev) +{ + if (!mlx5_debugfs_root) + return 0; + + atomic_set(&dev->num_qps, 0); + + dev->priv.qp_debugfs = debugfs_create_dir("QPs", dev->priv.dbg_root); + if (!dev->priv.qp_debugfs) + return -ENOMEM; + + return 0; +} + +void mlx5_qp_debugfs_cleanup(struct mlx5_core_dev *dev) +{ + if (!mlx5_debugfs_root) + return; + + debugfs_remove_recursive(dev->priv.qp_debugfs); +} + +int mlx5_eq_debugfs_init(struct mlx5_core_dev *dev) +{ + if (!mlx5_debugfs_root) + return 0; + + dev->priv.eq_debugfs = debugfs_create_dir("EQs", dev->priv.dbg_root); + if (!dev->priv.eq_debugfs) + return -ENOMEM; + + return 0; +} + +void mlx5_eq_debugfs_cleanup(struct mlx5_core_dev *dev) +{ + if (!mlx5_debugfs_root) + return; + + debugfs_remove_recursive(dev->priv.eq_debugfs); +} + +static ssize_t average_read(struct file *filp, char __user *buf, size_t count, + loff_t *pos) +{ + struct mlx5_cmd_stats *stats; + u64 field = 0; + int ret; + int err; + char tbuf[22]; + + if (*pos) + return 0; + + stats = filp->private_data; + spin_lock(&stats->lock); + if (stats->n) + field = stats->sum / stats->n; + spin_unlock(&stats->lock); + ret = snprintf(tbuf, sizeof(tbuf), "%llu\n", field); + if (ret > 0) { + err = copy_to_user(buf, tbuf, ret); + if (err) + return err; + } + + *pos += ret; + return ret; +} + + +static ssize_t average_write(struct file *filp, const char __user *buf, + size_t count, loff_t *pos) +{ + struct mlx5_cmd_stats *stats; + + stats = filp->private_data; + spin_lock(&stats->lock); + stats->sum = 0; + stats->n = 0; + spin_unlock(&stats->lock); + + *pos += count; + + return count; +} + +static const struct file_operations stats_fops = { + .owner = THIS_MODULE, + .open = simple_open, + .read = average_read, + .write = average_write, +}; + +int mlx5_cmdif_debugfs_init(struct mlx5_core_dev *dev) +{ + struct mlx5_cmd_stats *stats; + struct dentry **cmd; + const char *namep; + int err; + int i; + + if (!mlx5_debugfs_root) + return 0; + + cmd = &dev->priv.cmdif_debugfs; + *cmd = debugfs_create_dir("commands", dev->priv.dbg_root); + if (!*cmd) + return -ENOMEM; + + for (i = 0; i < ARRAY_SIZE(dev->cmd.stats); i++) { + stats = &dev->cmd.stats[i]; + namep = mlx5_command_str(i); + if (strcmp(namep, "unknown command opcode")) { + stats->root = debugfs_create_dir(namep, *cmd); + if (!stats->root) { + mlx5_core_warn(dev, "failed adding command %d\n", + i); + err = -ENOMEM; + goto out; + } + + stats->avg = debugfs_create_file("average", 0400, + stats->root, stats, + &stats_fops); + if (!stats->avg) { + mlx5_core_warn(dev, "failed creating debugfs file\n"); + err = -ENOMEM; + goto out; + } + + stats->count = debugfs_create_u64("n", 0400, + stats->root, + &stats->n); + if (!stats->count) { + mlx5_core_warn(dev, "failed creating debugfs file\n"); + err = -ENOMEM; + goto out; + } + } + } + + return 0; +out: + debugfs_remove_recursive(dev->priv.cmdif_debugfs); + return err; +} + +void mlx5_cmdif_debugfs_cleanup(struct mlx5_core_dev *dev) +{ + if (!mlx5_debugfs_root) + return; + + debugfs_remove_recursive(dev->priv.cmdif_debugfs); +} + +int mlx5_cq_debugfs_init(struct mlx5_core_dev *dev) +{ + if (!mlx5_debugfs_root) + return 0; + + dev->priv.cq_debugfs = debugfs_create_dir("CQs", dev->priv.dbg_root); + if (!dev->priv.cq_debugfs) + return -ENOMEM; + + return 0; +} + +void mlx5_cq_debugfs_cleanup(struct mlx5_core_dev *dev) +{ + if (!mlx5_debugfs_root) + return; + + debugfs_remove_recursive(dev->priv.cq_debugfs); +} + +static u64 qp_read_field(struct mlx5_core_dev *dev, struct mlx5_core_qp *qp, + int index) +{ + struct mlx5_query_qp_mbox_out *out; + struct mlx5_qp_context *ctx; + u64 param = 0; + int err; + int no_sq; + + out = kzalloc(sizeof(*out), GFP_KERNEL); + if (!out) + return param; + + err = mlx5_core_qp_query(dev, qp, out, sizeof(*out)); + if (err) { + mlx5_core_warn(dev, "failed to query qp\n"); + goto out; + } + + ctx = &out->ctx; + switch (index) { + case QP_PID: + param = qp->pid; + break; + case QP_STATE: + param = be32_to_cpu(ctx->flags) >> 28; + break; + case QP_XPORT: + param = (be32_to_cpu(ctx->flags) >> 16) & 0xff; + break; + case QP_MTU: + param = ctx->mtu_msgmax >> 5; + break; + case QP_N_RECV: + param = 1 << ((ctx->rq_size_stride >> 3) & 0xf); + break; + case QP_RECV_SZ: + param = 1 << ((ctx->rq_size_stride & 7) + 4); + break; + case QP_N_SEND: + no_sq = be16_to_cpu(ctx->sq_crq_size) >> 15; + if (!no_sq) + param = 1 << (be16_to_cpu(ctx->sq_crq_size) >> 11); + else + param = 0; + break; + case QP_LOG_PG_SZ: + param = ((cpu_to_be32(ctx->log_pg_sz_remote_qpn) >> 24) & 0x1f); + param += 12; + break; + case QP_RQPN: + param = cpu_to_be32(ctx->log_pg_sz_remote_qpn) & 0xffffff; + break; + } + +out: + kfree(out); + return param; +} + +static u64 eq_read_field(struct mlx5_core_dev *dev, struct mlx5_eq *eq, + int index) +{ + struct mlx5_query_eq_mbox_out *out; + struct mlx5_eq_context *ctx; + u64 param = 0; + int err; + + out = kzalloc(sizeof(*out), GFP_KERNEL); + if (!out) + return param; + + ctx = &out->ctx; + + err = mlx5_core_eq_query(dev, eq, out, sizeof(*out)); + if (err) { + mlx5_core_warn(dev, "failed to query eq\n"); + goto out; + } + + switch (index) { + case EQ_NUM_EQES: + param = 1 << ((be32_to_cpu(ctx->log_sz_usr_page) >> 24) & 0x1f); + break; + case EQ_INTR: + param = ctx->intr; + break; + case EQ_LOG_PG_SZ: + param = (ctx->log_page_size & 0x1f) + 12; + break; + } + +out: + kfree(out); + return param; +} + +static u64 cq_read_field(struct mlx5_core_dev *dev, struct mlx5_core_cq *cq, + int index) +{ + struct mlx5_query_cq_mbox_out *out; + struct mlx5_cq_context *ctx; + u64 param = 0; + int err; + + out = kzalloc(sizeof(*out), GFP_KERNEL); + if (!out) + return param; + + ctx = &out->ctx; + + err = mlx5_core_query_cq(dev, cq, out); + if (err) { + mlx5_core_warn(dev, "failed to query cq\n"); + goto out; + } + + switch (index) { + case CQ_PID: + param = cq->pid; + break; + case CQ_NUM_CQES: + param = 1 << ((be32_to_cpu(ctx->log_sz_usr_page) >> 24) & 0x1f); + break; + case CQ_LOG_PG_SZ: + param = (ctx->log_pg_sz & 0x1f) + 12; + break; + } + +out: + kfree(out); + return param; +} + +static ssize_t dbg_read(struct file *filp, char __user *buf, size_t count, + loff_t *pos) +{ + struct mlx5_field_desc *desc; + struct mlx5_rsc_debug *d; + char tbuf[18]; + u64 field; + int ret; + int err; + + if (*pos) + return 0; + + desc = filp->private_data; + d = (void *)(desc - desc->i) - sizeof(*d); + switch (d->type) { + case MLX5_DBG_RSC_QP: + field = qp_read_field(d->dev, d->object, desc->i); + break; + + case MLX5_DBG_RSC_EQ: + field = eq_read_field(d->dev, d->object, desc->i); + break; + + case MLX5_DBG_RSC_CQ: + field = cq_read_field(d->dev, d->object, desc->i); + break; + + default: + mlx5_core_warn(d->dev, "invalid resource type %d\n", d->type); + return -EINVAL; + } + + ret = snprintf(tbuf, sizeof(tbuf), "0x%llx\n", field); + if (ret > 0) { + err = copy_to_user(buf, tbuf, ret); + if (err) + return err; + } + + *pos += ret; + return ret; +} + +static const struct file_operations fops = { + .owner = THIS_MODULE, + .open = simple_open, + .read = dbg_read, +}; + +static int add_res_tree(struct mlx5_core_dev *dev, enum dbg_rsc_type type, + struct dentry *root, struct mlx5_rsc_debug **dbg, + int rsn, char **field, int nfile, void *data) +{ + struct mlx5_rsc_debug *d; + char resn[32]; + int err; + int i; + + d = kzalloc(sizeof(*d) + nfile * sizeof(d->fields[0]), GFP_KERNEL); + if (!d) + return -ENOMEM; + + d->dev = dev; + d->object = data; + d->type = type; + sprintf(resn, "0x%x", rsn); + d->root = debugfs_create_dir(resn, root); + if (!d->root) { + err = -ENOMEM; + goto out_free; + } + + for (i = 0; i < nfile; i++) { + d->fields[i].i = i; + d->fields[i].dent = debugfs_create_file(field[i], 0400, + d->root, &d->fields[i], + &fops); + if (!d->fields[i].dent) { + err = -ENOMEM; + goto out_rem; + } + } + *dbg = d; + + return 0; +out_rem: + debugfs_remove_recursive(d->root); + +out_free: + kfree(d); + return err; +} + +static void rem_res_tree(struct mlx5_rsc_debug *d) +{ + debugfs_remove_recursive(d->root); + kfree(d); +} + +int mlx5_debug_qp_add(struct mlx5_core_dev *dev, struct mlx5_core_qp *qp) +{ + int err; + + if (!mlx5_debugfs_root) + return 0; + + err = add_res_tree(dev, MLX5_DBG_RSC_QP, dev->priv.qp_debugfs, + &qp->dbg, qp->qpn, qp_fields, + ARRAY_SIZE(qp_fields), qp); + if (err) + qp->dbg = NULL; + + return err; +} + +void mlx5_debug_qp_remove(struct mlx5_core_dev *dev, struct mlx5_core_qp *qp) +{ + if (!mlx5_debugfs_root) + return; + + if (qp->dbg) + rem_res_tree(qp->dbg); +} + + +int mlx5_debug_eq_add(struct mlx5_core_dev *dev, struct mlx5_eq *eq) +{ + int err; + + if (!mlx5_debugfs_root) + return 0; + + err = add_res_tree(dev, MLX5_DBG_RSC_EQ, dev->priv.eq_debugfs, + &eq->dbg, eq->eqn, eq_fields, + ARRAY_SIZE(eq_fields), eq); + if (err) + eq->dbg = NULL; + + return err; +} + +void mlx5_debug_eq_remove(struct mlx5_core_dev *dev, struct mlx5_eq *eq) +{ + if (!mlx5_debugfs_root) + return; + + if (eq->dbg) + rem_res_tree(eq->dbg); +} + +int mlx5_debug_cq_add(struct mlx5_core_dev *dev, struct mlx5_core_cq *cq) +{ + int err; + + if (!mlx5_debugfs_root) + return 0; + + err = add_res_tree(dev, MLX5_DBG_RSC_CQ, dev->priv.cq_debugfs, + &cq->dbg, cq->cqn, cq_fields, + ARRAY_SIZE(cq_fields), cq); + if (err) + cq->dbg = NULL; + + return err; +} + +void mlx5_debug_cq_remove(struct mlx5_core_dev *dev, struct mlx5_core_cq *cq) +{ + if (!mlx5_debugfs_root) + return; + + if (cq->dbg) + rem_res_tree(cq->dbg); +} diff --git a/drivers/net/ethernet/mellanox/mlx5/core/eq.c b/drivers/net/ethernet/mellanox/mlx5/core/eq.c new file mode 100644 index 000000000000..c02cbcfd0fb8 --- /dev/null +++ b/drivers/net/ethernet/mellanox/mlx5/core/eq.c @@ -0,0 +1,521 @@ +/* + * Copyright (c) 2013, Mellanox Technologies inc. All rights reserved. + * + * This software is available to you under a choice of one of two + * licenses. You may choose to be licensed under the terms of the GNU + * General Public License (GPL) Version 2, available from the file + * COPYING in the main directory of this source tree, or the + * OpenIB.org BSD license below: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * - Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * - Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +#include <linux/interrupt.h> +#include <linux/module.h> +#include <linux/mlx5/driver.h> +#include <linux/mlx5/cmd.h> +#include "mlx5_core.h" + +enum { + MLX5_EQE_SIZE = sizeof(struct mlx5_eqe), + MLX5_EQE_OWNER_INIT_VAL = 0x1, +}; + +enum { + MLX5_EQ_STATE_ARMED = 0x9, + MLX5_EQ_STATE_FIRED = 0xa, + MLX5_EQ_STATE_ALWAYS_ARMED = 0xb, +}; + +enum { + MLX5_NUM_SPARE_EQE = 0x80, + MLX5_NUM_ASYNC_EQE = 0x100, + MLX5_NUM_CMD_EQE = 32, +}; + +enum { + MLX5_EQ_DOORBEL_OFFSET = 0x40, +}; + +#define MLX5_ASYNC_EVENT_MASK ((1ull << MLX5_EVENT_TYPE_PATH_MIG) | \ + (1ull << MLX5_EVENT_TYPE_COMM_EST) | \ + (1ull << MLX5_EVENT_TYPE_SQ_DRAINED) | \ + (1ull << MLX5_EVENT_TYPE_CQ_ERROR) | \ + (1ull << MLX5_EVENT_TYPE_WQ_CATAS_ERROR) | \ + (1ull << MLX5_EVENT_TYPE_PATH_MIG_FAILED) | \ + (1ull << MLX5_EVENT_TYPE_WQ_INVAL_REQ_ERROR) | \ + (1ull << MLX5_EVENT_TYPE_WQ_ACCESS_ERROR) | \ + (1ull << MLX5_EVENT_TYPE_PORT_CHANGE) | \ + (1ull << MLX5_EVENT_TYPE_SRQ_CATAS_ERROR) | \ + (1ull << MLX5_EVENT_TYPE_SRQ_LAST_WQE) | \ + (1ull << MLX5_EVENT_TYPE_SRQ_RQ_LIMIT)) + +struct map_eq_in { + u64 mask; + u32 reserved; + u32 unmap_eqn; +}; + +struct cre_des_eq { + u8 reserved[15]; + u8 eqn; +}; + +static int mlx5_cmd_destroy_eq(struct mlx5_core_dev *dev, u8 eqn) +{ + struct mlx5_destroy_eq_mbox_in in; + struct mlx5_destroy_eq_mbox_out out; + int err; + + memset(&in, 0, sizeof(in)); + memset(&out, 0, sizeof(out)); + in.hdr.opcode = cpu_to_be16(MLX5_CMD_OP_DESTROY_EQ); + in.eqn = eqn; + err = mlx5_cmd_exec(dev, &in, sizeof(in), &out, sizeof(out)); + if (!err) + goto ex; + + if (out.hdr.status) + err = mlx5_cmd_status_to_err(&out.hdr); + +ex: + return err; +} + +static struct mlx5_eqe *get_eqe(struct mlx5_eq *eq, u32 entry) +{ + return mlx5_buf_offset(&eq->buf, entry * MLX5_EQE_SIZE); +} + +static struct mlx5_eqe *next_eqe_sw(struct mlx5_eq *eq) +{ + struct mlx5_eqe *eqe = get_eqe(eq, eq->cons_index & (eq->nent - 1)); + + return ((eqe->owner & 1) ^ !!(eq->cons_index & eq->nent)) ? NULL : eqe; +} + +static const char *eqe_type_str(u8 type) +{ + switch (type) { + case MLX5_EVENT_TYPE_COMP: + return "MLX5_EVENT_TYPE_COMP"; + case MLX5_EVENT_TYPE_PATH_MIG: + return "MLX5_EVENT_TYPE_PATH_MIG"; + case MLX5_EVENT_TYPE_COMM_EST: + return "MLX5_EVENT_TYPE_COMM_EST"; + case MLX5_EVENT_TYPE_SQ_DRAINED: + return "MLX5_EVENT_TYPE_SQ_DRAINED"; + case MLX5_EVENT_TYPE_SRQ_LAST_WQE: + return "MLX5_EVENT_TYPE_SRQ_LAST_WQE"; + case MLX5_EVENT_TYPE_SRQ_RQ_LIMIT: + return "MLX5_EVENT_TYPE_SRQ_RQ_LIMIT"; + case MLX5_EVENT_TYPE_CQ_ERROR: + return "MLX5_EVENT_TYPE_CQ_ERROR"; + case MLX5_EVENT_TYPE_WQ_CATAS_ERROR: + return "MLX5_EVENT_TYPE_WQ_CATAS_ERROR"; + case MLX5_EVENT_TYPE_PATH_MIG_FAILED: + return "MLX5_EVENT_TYPE_PATH_MIG_FAILED"; + case MLX5_EVENT_TYPE_WQ_INVAL_REQ_ERROR: + return "MLX5_EVENT_TYPE_WQ_INVAL_REQ_ERROR"; + case MLX5_EVENT_TYPE_WQ_ACCESS_ERROR: + return "MLX5_EVENT_TYPE_WQ_ACCESS_ERROR"; + case MLX5_EVENT_TYPE_SRQ_CATAS_ERROR: + return "MLX5_EVENT_TYPE_SRQ_CATAS_ERROR"; + case MLX5_EVENT_TYPE_INTERNAL_ERROR: + return "MLX5_EVENT_TYPE_INTERNAL_ERROR"; + case MLX5_EVENT_TYPE_PORT_CHANGE: + return "MLX5_EVENT_TYPE_PORT_CHANGE"; + case MLX5_EVENT_TYPE_GPIO_EVENT: + return "MLX5_EVENT_TYPE_GPIO_EVENT"; + case MLX5_EVENT_TYPE_REMOTE_CONFIG: + return "MLX5_EVENT_TYPE_REMOTE_CONFIG"; + case MLX5_EVENT_TYPE_DB_BF_CONGESTION: + return "MLX5_EVENT_TYPE_DB_BF_CONGESTION"; + case MLX5_EVENT_TYPE_STALL_EVENT: + return "MLX5_EVENT_TYPE_STALL_EVENT"; + case MLX5_EVENT_TYPE_CMD: + return "MLX5_EVENT_TYPE_CMD"; + case MLX5_EVENT_TYPE_PAGE_REQUEST: + return "MLX5_EVENT_TYPE_PAGE_REQUEST"; + default: + return "Unrecognized event"; + } +} + +static enum mlx5_dev_event port_subtype_event(u8 subtype) +{ + switch (subtype) { + case MLX5_PORT_CHANGE_SUBTYPE_DOWN: + return MLX5_DEV_EVENT_PORT_DOWN; + case MLX5_PORT_CHANGE_SUBTYPE_ACTIVE: + return MLX5_DEV_EVENT_PORT_UP; + case MLX5_PORT_CHANGE_SUBTYPE_INITIALIZED: + return MLX5_DEV_EVENT_PORT_INITIALIZED; + case MLX5_PORT_CHANGE_SUBTYPE_LID: + return MLX5_DEV_EVENT_LID_CHANGE; + case MLX5_PORT_CHANGE_SUBTYPE_PKEY: + return MLX5_DEV_EVENT_PKEY_CHANGE; + case MLX5_PORT_CHANGE_SUBTYPE_GUID: + return MLX5_DEV_EVENT_GUID_CHANGE; + case MLX5_PORT_CHANGE_SUBTYPE_CLIENT_REREG: + return MLX5_DEV_EVENT_CLIENT_REREG; + } + return -1; +} + +static void eq_update_ci(struct mlx5_eq *eq, int arm) +{ + __be32 __iomem *addr = eq->doorbell + (arm ? 0 : 2); + u32 val = (eq->cons_index & 0xffffff) | (eq->eqn << 24); + __raw_writel((__force u32) cpu_to_be32(val), addr); + /* We still want ordering, just not swabbing, so add a barrier */ + mb(); +} + +static int mlx5_eq_int(struct mlx5_core_dev *dev, struct mlx5_eq *eq) +{ + struct mlx5_eqe *eqe; + int eqes_found = 0; + int set_ci = 0; + u32 cqn; + u32 srqn; + u8 port; + + while ((eqe = next_eqe_sw(eq))) { + /* + * Make sure we read EQ entry contents after we've + * checked the ownership bit. + */ + rmb(); + + mlx5_core_dbg(eq->dev, "eqn %d, eqe type %s\n", eq->eqn, eqe_type_str(eqe->type)); + switch (eqe->type) { + case MLX5_EVENT_TYPE_COMP: + cqn = be32_to_cpu(eqe->data.comp.cqn) & 0xffffff; + mlx5_cq_completion(dev, cqn); + break; + + case MLX5_EVENT_TYPE_PATH_MIG: + case MLX5_EVENT_TYPE_COMM_EST: + case MLX5_EVENT_TYPE_SQ_DRAINED: + case MLX5_EVENT_TYPE_SRQ_LAST_WQE: + case MLX5_EVENT_TYPE_WQ_CATAS_ERROR: + case MLX5_EVENT_TYPE_PATH_MIG_FAILED: + case MLX5_EVENT_TYPE_WQ_INVAL_REQ_ERROR: + case MLX5_EVENT_TYPE_WQ_ACCESS_ERROR: + mlx5_core_dbg(dev, "event %s(%d) arrived\n", + eqe_type_str(eqe->type), eqe->type); + mlx5_qp_event(dev, be32_to_cpu(eqe->data.qp_srq.qp_srq_n) & 0xffffff, + eqe->type); + break; + + case MLX5_EVENT_TYPE_SRQ_RQ_LIMIT: + case MLX5_EVENT_TYPE_SRQ_CATAS_ERROR: + srqn = be32_to_cpu(eqe->data.qp_srq.qp_srq_n) & 0xffffff; + mlx5_core_dbg(dev, "SRQ event %s(%d): srqn 0x%x\n", + eqe_type_str(eqe->type), eqe->type, srqn); + mlx5_srq_event(dev, srqn, eqe->type); + break; + + case MLX5_EVENT_TYPE_CMD: + mlx5_cmd_comp_handler(dev, be32_to_cpu(eqe->data.cmd.vector)); + break; + + case MLX5_EVENT_TYPE_PORT_CHANGE: + port = (eqe->data.port.port >> 4) & 0xf; + switch (eqe->sub_type) { + case MLX5_PORT_CHANGE_SUBTYPE_DOWN: + case MLX5_PORT_CHANGE_SUBTYPE_ACTIVE: + case MLX5_PORT_CHANGE_SUBTYPE_LID: + case MLX5_PORT_CHANGE_SUBTYPE_PKEY: + case MLX5_PORT_CHANGE_SUBTYPE_GUID: + case MLX5_PORT_CHANGE_SUBTYPE_CLIENT_REREG: + case MLX5_PORT_CHANGE_SUBTYPE_INITIALIZED: + dev->event(dev, port_subtype_event(eqe->sub_type), &port); + break; + default: + mlx5_core_warn(dev, "Port event with unrecognized subtype: port %d, sub_type %d\n", + port, eqe->sub_type); + } + break; + case MLX5_EVENT_TYPE_CQ_ERROR: + cqn = be32_to_cpu(eqe->data.cq_err.cqn) & 0xffffff; + mlx5_core_warn(dev, "CQ error on CQN 0x%x, syndrom 0x%x\n", + cqn, eqe->data.cq_err.syndrome); + mlx5_cq_event(dev, cqn, eqe->type); + break; + + case MLX5_EVENT_TYPE_PAGE_REQUEST: + { + u16 func_id = be16_to_cpu(eqe->data.req_pages.func_id); + s16 npages = be16_to_cpu(eqe->data.req_pages.num_pages); + + mlx5_core_dbg(dev, "page request for func 0x%x, napges %d\n", func_id, npages); + mlx5_core_req_pages_handler(dev, func_id, npages); + } + break; + + + default: + mlx5_core_warn(dev, "Unhandled event 0x%x on EQ 0x%x\n", eqe->type, eq->eqn); + break; + } + + ++eq->cons_index; + eqes_found = 1; + ++set_ci; + + /* The HCA will think the queue has overflowed if we + * don't tell it we've been processing events. We + * create our EQs with MLX5_NUM_SPARE_EQE extra + * entries, so we must update our consumer index at + * least that often. + */ + if (unlikely(set_ci >= MLX5_NUM_SPARE_EQE)) { + eq_update_ci(eq, 0); + set_ci = 0; + } + } + + eq_update_ci(eq, 1); + + return eqes_found; +} + +static irqreturn_t mlx5_msix_handler(int irq, void *eq_ptr) +{ + struct mlx5_eq *eq = eq_ptr; + struct mlx5_core_dev *dev = eq->dev; + + mlx5_eq_int(dev, eq); + + /* MSI-X vectors always belong to us */ + return IRQ_HANDLED; +} + +static void init_eq_buf(struct mlx5_eq *eq) +{ + struct mlx5_eqe *eqe; + int i; + + for (i = 0; i < eq->nent; i++) { + eqe = get_eqe(eq, i); + eqe->owner = MLX5_EQE_OWNER_INIT_VAL; + } +} + +int mlx5_create_map_eq(struct mlx5_core_dev *dev, struct mlx5_eq *eq, u8 vecidx, + int nent, u64 mask, const char *name, struct mlx5_uar *uar) +{ + struct mlx5_eq_table *table = &dev->priv.eq_table; + struct mlx5_create_eq_mbox_in *in; + struct mlx5_create_eq_mbox_out out; + int err; + int inlen; + + eq->nent = roundup_pow_of_two(nent + MLX5_NUM_SPARE_EQE); + err = mlx5_buf_alloc(dev, eq->nent * MLX5_EQE_SIZE, 2 * PAGE_SIZE, + &eq->buf); + if (err) + return err; + + init_eq_buf(eq); + + inlen = sizeof(*in) + sizeof(in->pas[0]) * eq->buf.npages; + in = mlx5_vzalloc(inlen); + if (!in) { + err = -ENOMEM; + goto err_buf; + } + memset(&out, 0, sizeof(out)); + + mlx5_fill_page_array(&eq->buf, in->pas); + + in->hdr.opcode = cpu_to_be16(MLX5_CMD_OP_CREATE_EQ); + in->ctx.log_sz_usr_page = cpu_to_be32(ilog2(eq->nent) << 24 | uar->index); + in->ctx.intr = vecidx; + in->ctx.log_page_size = PAGE_SHIFT - 12; + in->events_mask = cpu_to_be64(mask); + + err = mlx5_cmd_exec(dev, in, inlen, &out, sizeof(out)); + if (err) + goto err_in; + + if (out.hdr.status) { + err = mlx5_cmd_status_to_err(&out.hdr); + goto err_in; + } + + eq->eqn = out.eq_number; + err = request_irq(table->msix_arr[vecidx].vector, mlx5_msix_handler, 0, + name, eq); + if (err) + goto err_eq; + + eq->irqn = vecidx; + eq->dev = dev; + eq->doorbell = uar->map + MLX5_EQ_DOORBEL_OFFSET; + + err = mlx5_debug_eq_add(dev, eq); + if (err) + goto err_irq; + + /* EQs are created in ARMED state + */ + eq_update_ci(eq, 1); + + mlx5_vfree(in); + return 0; + +err_irq: + free_irq(table->msix_arr[vecidx].vector, eq); + +err_eq: + mlx5_cmd_destroy_eq(dev, eq->eqn); + +err_in: + mlx5_vfree(in); + +err_buf: + mlx5_buf_free(dev, &eq->buf); + return err; +} +EXPORT_SYMBOL_GPL(mlx5_create_map_eq); + +int mlx5_destroy_unmap_eq(struct mlx5_core_dev *dev, struct mlx5_eq *eq) +{ + struct mlx5_eq_table *table = &dev->priv.eq_table; + int err; + + mlx5_debug_eq_remove(dev, eq); + free_irq(table->msix_arr[eq->irqn].vector, eq); + err = mlx5_cmd_destroy_eq(dev, eq->eqn); + if (err) + mlx5_core_warn(dev, "failed to destroy a previously created eq: eqn %d\n", + eq->eqn); + mlx5_buf_free(dev, &eq->buf); + + return err; +} +EXPORT_SYMBOL_GPL(mlx5_destroy_unmap_eq); + +int mlx5_eq_init(struct mlx5_core_dev *dev) +{ + int err; + + spin_lock_init(&dev->priv.eq_table.lock); + + err = mlx5_eq_debugfs_init(dev); + + return err; +} + + +void mlx5_eq_cleanup(struct mlx5_core_dev *dev) +{ + mlx5_eq_debugfs_cleanup(dev); +} + +int mlx5_start_eqs(struct mlx5_core_dev *dev) +{ + struct mlx5_eq_table *table = &dev->priv.eq_table; + int err; + + err = mlx5_create_map_eq(dev, &table->cmd_eq, MLX5_EQ_VEC_CMD, + MLX5_NUM_CMD_EQE, 1ull << MLX5_EVENT_TYPE_CMD, + "mlx5_cmd_eq", &dev->priv.uuari.uars[0]); + if (err) { + mlx5_core_warn(dev, "failed to create cmd EQ %d\n", err); + return err; + } + + mlx5_cmd_use_events(dev); + + err = mlx5_create_map_eq(dev, &table->async_eq, MLX5_EQ_VEC_ASYNC, + MLX5_NUM_ASYNC_EQE, MLX5_ASYNC_EVENT_MASK, + "mlx5_async_eq", &dev->priv.uuari.uars[0]); + if (err) { + mlx5_core_warn(dev, "failed to create async EQ %d\n", err); + goto err1; + } + + err = mlx5_create_map_eq(dev, &table->pages_eq, + MLX5_EQ_VEC_PAGES, + dev->caps.max_vf + 1, + 1 << MLX5_EVENT_TYPE_PAGE_REQUEST, "mlx5_pages_eq", + &dev->priv.uuari.uars[0]); + if (err) { + mlx5_core_warn(dev, "failed to create pages EQ %d\n", err); + goto err2; + } + + return err; + +err2: + mlx5_destroy_unmap_eq(dev, &table->async_eq); + +err1: + mlx5_cmd_use_polling(dev); + mlx5_destroy_unmap_eq(dev, &table->cmd_eq); + return err; +} + +int mlx5_stop_eqs(struct mlx5_core_dev *dev) +{ + struct mlx5_eq_table *table = &dev->priv.eq_table; + int err; + + err = mlx5_destroy_unmap_eq(dev, &table->pages_eq); + if (err) + return err; + + mlx5_destroy_unmap_eq(dev, &table->async_eq); + mlx5_cmd_use_polling(dev); + + err = mlx5_destroy_unmap_eq(dev, &table->cmd_eq); + if (err) + mlx5_cmd_use_events(dev); + + return err; +} + +int mlx5_core_eq_query(struct mlx5_core_dev *dev, struct mlx5_eq *eq, + struct mlx5_query_eq_mbox_out *out, int outlen) +{ + struct mlx5_query_eq_mbox_in in; + int err; + + memset(&in, 0, sizeof(in)); + memset(out, 0, outlen); + in.hdr.opcode = cpu_to_be16(MLX5_CMD_OP_QUERY_EQ); + in.eqn = eq->eqn; + err = mlx5_cmd_exec(dev, &in, sizeof(in), out, outlen); + if (err) + return err; + + if (out->hdr.status) + err = mlx5_cmd_status_to_err(&out->hdr); + + return err; +} +EXPORT_SYMBOL_GPL(mlx5_core_eq_query); diff --git a/drivers/net/ethernet/mellanox/mlx5/core/fw.c b/drivers/net/ethernet/mellanox/mlx5/core/fw.c new file mode 100644 index 000000000000..72a5222447f5 --- /dev/null +++ b/drivers/net/ethernet/mellanox/mlx5/core/fw.c @@ -0,0 +1,185 @@ +/* + * Copyright (c) 2013, Mellanox Technologies inc. All rights reserved. + * + * This software is available to you under a choice of one of two + * licenses. You may choose to be licensed under the terms of the GNU + * General Public License (GPL) Version 2, available from the file + * COPYING in the main directory of this source tree, or the + * OpenIB.org BSD license below: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * - Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * - Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +#include <linux/mlx5/driver.h> +#include <linux/mlx5/cmd.h> +#include <linux/module.h> +#include "mlx5_core.h" + +int mlx5_cmd_query_adapter(struct mlx5_core_dev *dev) +{ + struct mlx5_cmd_query_adapter_mbox_out *out; + struct mlx5_cmd_query_adapter_mbox_in in; + int err; + + out = kzalloc(sizeof(*out), GFP_KERNEL); + if (!out) + return -ENOMEM; + + memset(&in, 0, sizeof(in)); + in.hdr.opcode = cpu_to_be16(MLX5_CMD_OP_QUERY_ADAPTER); + err = mlx5_cmd_exec(dev, &in, sizeof(in), out, sizeof(*out)); + if (err) + goto out_out; + + if (out->hdr.status) { + err = mlx5_cmd_status_to_err(&out->hdr); + goto out_out; + } + + memcpy(dev->board_id, out->vsd_psid, sizeof(out->vsd_psid)); + +out_out: + kfree(out); + + return err; +} + +int mlx5_cmd_query_hca_cap(struct mlx5_core_dev *dev, + struct mlx5_caps *caps) +{ + struct mlx5_cmd_query_hca_cap_mbox_out *out; + struct mlx5_cmd_query_hca_cap_mbox_in in; + struct mlx5_query_special_ctxs_mbox_out ctx_out; + struct mlx5_query_special_ctxs_mbox_in ctx_in; + int err; + u16 t16; + + out = kzalloc(sizeof(*out), GFP_KERNEL); + if (!out) + return -ENOMEM; + + memset(&in, 0, sizeof(in)); + in.hdr.opcode = cpu_to_be16(MLX5_CMD_OP_QUERY_HCA_CAP); + in.hdr.opmod = cpu_to_be16(0x1); + err = mlx5_cmd_exec(dev, &in, sizeof(in), out, sizeof(*out)); + if (err) + goto out_out; + + if (out->hdr.status) { + err = mlx5_cmd_status_to_err(&out->hdr); + goto out_out; + } + + + caps->log_max_eq = out->hca_cap.log_max_eq & 0xf; + caps->max_cqes = 1 << out->hca_cap.log_max_cq_sz; + caps->max_wqes = 1 << out->hca_cap.log_max_qp_sz; + caps->max_sq_desc_sz = be16_to_cpu(out->hca_cap.max_desc_sz_sq); + caps->max_rq_desc_sz = be16_to_cpu(out->hca_cap.max_desc_sz_rq); + caps->flags = be64_to_cpu(out->hca_cap.flags); + caps->stat_rate_support = be16_to_cpu(out->hca_cap.stat_rate_support); + caps->log_max_msg = out->hca_cap.log_max_msg & 0x1f; + caps->num_ports = out->hca_cap.num_ports & 0xf; + caps->log_max_cq = out->hca_cap.log_max_cq & 0x1f; + if (caps->num_ports > MLX5_MAX_PORTS) { + mlx5_core_err(dev, "device has %d ports while the driver supports max %d ports\n", + caps->num_ports, MLX5_MAX_PORTS); + err = -EINVAL; + goto out_out; + } + caps->log_max_qp = out->hca_cap.log_max_qp & 0x1f; + caps->log_max_mkey = out->hca_cap.log_max_mkey & 0x3f; + caps->log_max_pd = out->hca_cap.log_max_pd & 0x1f; + caps->log_max_srq = out->hca_cap.log_max_srqs & 0x1f; + caps->local_ca_ack_delay = out->hca_cap.local_ca_ack_delay & 0x1f; + caps->log_max_mcg = out->hca_cap.log_max_mcg; + caps->max_qp_mcg = be16_to_cpu(out->hca_cap.max_qp_mcg); + caps->max_ra_res_qp = 1 << (out->hca_cap.log_max_ra_res_qp & 0x3f); + caps->max_ra_req_qp = 1 << (out->hca_cap.log_max_ra_req_qp & 0x3f); + caps->max_srq_wqes = 1 << out->hca_cap.log_max_srq_sz; + t16 = be16_to_cpu(out->hca_cap.bf_log_bf_reg_size); + if (t16 & 0x8000) { + caps->bf_reg_size = 1 << (t16 & 0x1f); + caps->bf_regs_per_page = MLX5_BF_REGS_PER_PAGE; + } else { + caps->bf_reg_size = 0; + caps->bf_regs_per_page = 0; + } + caps->min_page_sz = ~(u32)((1 << out->hca_cap.log_pg_sz) - 1); + + memset(&ctx_in, 0, sizeof(ctx_in)); + memset(&ctx_out, 0, sizeof(ctx_out)); + ctx_in.hdr.opcode = cpu_to_be16(MLX5_CMD_OP_QUERY_SPECIAL_CONTEXTS); + err = mlx5_cmd_exec(dev, &ctx_in, sizeof(ctx_in), + &ctx_out, sizeof(ctx_out)); + if (err) + goto out_out; + + if (ctx_out.hdr.status) + err = mlx5_cmd_status_to_err(&ctx_out.hdr); + + caps->reserved_lkey = be32_to_cpu(ctx_out.reserved_lkey); + +out_out: + kfree(out); + + return err; +} + +int mlx5_cmd_init_hca(struct mlx5_core_dev *dev) +{ + struct mlx5_cmd_init_hca_mbox_in in; + struct mlx5_cmd_init_hca_mbox_out out; + int err; + + memset(&in, 0, sizeof(in)); + memset(&out, 0, sizeof(out)); + in.hdr.opcode = cpu_to_be16(MLX5_CMD_OP_INIT_HCA); + err = mlx5_cmd_exec(dev, &in, sizeof(in), &out, sizeof(out)); + if (err) + return err; + + if (out.hdr.status) + err = mlx5_cmd_status_to_err(&out.hdr); + + return err; +} + +int mlx5_cmd_teardown_hca(struct mlx5_core_dev *dev) +{ + struct mlx5_cmd_teardown_hca_mbox_in in; + struct mlx5_cmd_teardown_hca_mbox_out out; + int err; + + memset(&in, 0, sizeof(in)); + memset(&out, 0, sizeof(out)); + in.hdr.opcode = cpu_to_be16(MLX5_CMD_OP_TEARDOWN_HCA); + err = mlx5_cmd_exec(dev, &in, sizeof(in), &out, sizeof(out)); + if (err) + return err; + + if (out.hdr.status) + err = mlx5_cmd_status_to_err(&out.hdr); + + return err; +} diff --git a/drivers/net/ethernet/mellanox/mlx5/core/health.c b/drivers/net/ethernet/mellanox/mlx5/core/health.c new file mode 100644 index 000000000000..ea4b9bca6d4a --- /dev/null +++ b/drivers/net/ethernet/mellanox/mlx5/core/health.c @@ -0,0 +1,217 @@ +/* + * Copyright (c) 2013, Mellanox Technologies inc. All rights reserved. + * + * This software is available to you under a choice of one of two + * licenses. You may choose to be licensed under the terms of the GNU + * General Public License (GPL) Version 2, available from the file + * COPYING in the main directory of this source tree, or the + * OpenIB.org BSD license below: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * - Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * - Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/random.h> +#include <linux/vmalloc.h> +#include <linux/mlx5/driver.h> +#include <linux/mlx5/cmd.h> +#include "mlx5_core.h" + +enum { + MLX5_HEALTH_POLL_INTERVAL = 2 * HZ, + MAX_MISSES = 3, +}; + +enum { + MLX5_HEALTH_SYNDR_FW_ERR = 0x1, + MLX5_HEALTH_SYNDR_IRISC_ERR = 0x7, + MLX5_HEALTH_SYNDR_CRC_ERR = 0x9, + MLX5_HEALTH_SYNDR_FETCH_PCI_ERR = 0xa, + MLX5_HEALTH_SYNDR_HW_FTL_ERR = 0xb, + MLX5_HEALTH_SYNDR_ASYNC_EQ_OVERRUN_ERR = 0xc, + MLX5_HEALTH_SYNDR_EQ_ERR = 0xd, + MLX5_HEALTH_SYNDR_FFSER_ERR = 0xf, +}; + +static DEFINE_SPINLOCK(health_lock); + +static LIST_HEAD(health_list); +static struct work_struct health_work; + +static health_handler_t reg_handler; +int mlx5_register_health_report_handler(health_handler_t handler) +{ + spin_lock_irq(&health_lock); + if (reg_handler) { + spin_unlock_irq(&health_lock); + return -EEXIST; + } + reg_handler = handler; + spin_unlock_irq(&health_lock); + + return 0; +} +EXPORT_SYMBOL(mlx5_register_health_report_handler); + +void mlx5_unregister_health_report_handler(void) +{ + spin_lock_irq(&health_lock); + reg_handler = NULL; + spin_unlock_irq(&health_lock); +} +EXPORT_SYMBOL(mlx5_unregister_health_report_handler); + +static void health_care(struct work_struct *work) +{ + struct mlx5_core_health *health, *n; + struct mlx5_core_dev *dev; + struct mlx5_priv *priv; + LIST_HEAD(tlist); + + spin_lock_irq(&health_lock); + list_splice_init(&health_list, &tlist); + + spin_unlock_irq(&health_lock); + + list_for_each_entry_safe(health, n, &tlist, list) { + priv = container_of(health, struct mlx5_priv, health); + dev = container_of(priv, struct mlx5_core_dev, priv); + mlx5_core_warn(dev, "handling bad device here\n"); + spin_lock_irq(&health_lock); + if (reg_handler) + reg_handler(dev->pdev, health->health, + sizeof(health->health)); + + list_del_init(&health->list); + spin_unlock_irq(&health_lock); + } +} + +static const char *hsynd_str(u8 synd) +{ + switch (synd) { + case MLX5_HEALTH_SYNDR_FW_ERR: + return "firmware internal error"; + case MLX5_HEALTH_SYNDR_IRISC_ERR: + return "irisc not responding"; + case MLX5_HEALTH_SYNDR_CRC_ERR: + return "firmware CRC error"; + case MLX5_HEALTH_SYNDR_FETCH_PCI_ERR: + return "ICM fetch PCI error"; + case MLX5_HEALTH_SYNDR_HW_FTL_ERR: + return "HW fatal error\n"; + case MLX5_HEALTH_SYNDR_ASYNC_EQ_OVERRUN_ERR: + return "async EQ buffer overrun"; + case MLX5_HEALTH_SYNDR_EQ_ERR: + return "EQ error"; + case MLX5_HEALTH_SYNDR_FFSER_ERR: + return "FFSER error"; + default: + return "unrecognized error"; + } +} + +static void print_health_info(struct mlx5_core_dev *dev) +{ + struct mlx5_core_health *health = &dev->priv.health; + struct health_buffer __iomem *h = health->health; + int i; + + for (i = 0; i < ARRAY_SIZE(h->assert_var); i++) + pr_info("assert_var[%d] 0x%08x\n", i, be32_to_cpu(h->assert_var[i])); + + pr_info("assert_exit_ptr 0x%08x\n", be32_to_cpu(h->assert_exit_ptr)); + pr_info("assert_callra 0x%08x\n", be32_to_cpu(h->assert_callra)); + pr_info("fw_ver 0x%08x\n", be32_to_cpu(h->fw_ver)); + pr_info("hw_id 0x%08x\n", be32_to_cpu(h->hw_id)); + pr_info("irisc_index %d\n", h->irisc_index); + pr_info("synd 0x%x: %s\n", h->synd, hsynd_str(h->synd)); + pr_info("ext_sync 0x%04x\n", be16_to_cpu(h->ext_sync)); +} + +static void poll_health(unsigned long data) +{ + struct mlx5_core_dev *dev = (struct mlx5_core_dev *)data; + struct mlx5_core_health *health = &dev->priv.health; + unsigned long next; + u32 count; + + count = ioread32be(health->health_counter); + if (count == health->prev) + ++health->miss_counter; + else + health->miss_counter = 0; + + health->prev = count; + if (health->miss_counter == MAX_MISSES) { + mlx5_core_err(dev, "device's health compromised\n"); + print_health_info(dev); + spin_lock_irq(&health_lock); + list_add_tail(&health->list, &health_list); + spin_unlock_irq(&health_lock); + + queue_work(mlx5_core_wq, &health_work); + } else { + get_random_bytes(&next, sizeof(next)); + next %= HZ; + next += jiffies + MLX5_HEALTH_POLL_INTERVAL; + mod_timer(&health->timer, next); + } +} + +void mlx5_start_health_poll(struct mlx5_core_dev *dev) +{ + struct mlx5_core_health *health = &dev->priv.health; + + INIT_LIST_HEAD(&health->list); + init_timer(&health->timer); + health->health = &dev->iseg->health; + health->health_counter = &dev->iseg->health_counter; + + health->timer.data = (unsigned long)dev; + health->timer.function = poll_health; + health->timer.expires = round_jiffies(jiffies + MLX5_HEALTH_POLL_INTERVAL); + add_timer(&health->timer); +} + +void mlx5_stop_health_poll(struct mlx5_core_dev *dev) +{ + struct mlx5_core_health *health = &dev->priv.health; + + del_timer_sync(&health->timer); + + spin_lock_irq(&health_lock); + if (!list_empty(&health->list)) + list_del_init(&health->list); + spin_unlock_irq(&health_lock); +} + +void mlx5_health_cleanup(void) +{ +} + +void __init mlx5_health_init(void) +{ + INIT_WORK(&health_work, health_care); +} diff --git a/drivers/net/ethernet/mellanox/mlx5/core/mad.c b/drivers/net/ethernet/mellanox/mlx5/core/mad.c new file mode 100644 index 000000000000..18d6fd5dd90b --- /dev/null +++ b/drivers/net/ethernet/mellanox/mlx5/core/mad.c @@ -0,0 +1,78 @@ +/* + * Copyright (c) 2013, Mellanox Technologies inc. All rights reserved. + * + * This software is available to you under a choice of one of two + * licenses. You may choose to be licensed under the terms of the GNU + * General Public License (GPL) Version 2, available from the file + * COPYING in the main directory of this source tree, or the + * OpenIB.org BSD license below: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * - Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * - Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/mlx5/driver.h> +#include <linux/mlx5/cmd.h> +#include "mlx5_core.h" + +int mlx5_core_mad_ifc(struct mlx5_core_dev *dev, void *inb, void *outb, + u16 opmod, int port) +{ + struct mlx5_mad_ifc_mbox_in *in = NULL; + struct mlx5_mad_ifc_mbox_out *out = NULL; + int err; + + in = kzalloc(sizeof(*in), GFP_KERNEL); + if (!in) + return -ENOMEM; + + out = kzalloc(sizeof(*out), GFP_KERNEL); + if (!out) { + err = -ENOMEM; + goto out; + } + + in->hdr.opcode = cpu_to_be16(MLX5_CMD_OP_MAD_IFC); + in->hdr.opmod = cpu_to_be16(opmod); + in->port = port; + + memcpy(in->data, inb, sizeof(in->data)); + + err = mlx5_cmd_exec(dev, in, sizeof(*in), out, sizeof(*out)); + if (err) + goto out; + + if (out->hdr.status) { + err = mlx5_cmd_status_to_err(&out->hdr); + goto out; + } + + memcpy(outb, out->data, sizeof(out->data)); + +out: + kfree(out); + kfree(in); + return err; +} +EXPORT_SYMBOL_GPL(mlx5_core_mad_ifc); diff --git a/drivers/net/ethernet/mellanox/mlx5/core/main.c b/drivers/net/ethernet/mellanox/mlx5/core/main.c new file mode 100644 index 000000000000..f21cc397d1bc --- /dev/null +++ b/drivers/net/ethernet/mellanox/mlx5/core/main.c @@ -0,0 +1,475 @@ +/* + * Copyright (c) 2013, Mellanox Technologies inc. All rights reserved. + * + * This software is available to you under a choice of one of two + * licenses. You may choose to be licensed under the terms of the GNU + * General Public License (GPL) Version 2, available from the file + * COPYING in the main directory of this source tree, or the + * OpenIB.org BSD license below: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * - Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * - Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +#include <asm-generic/kmap_types.h> +#include <linux/module.h> +#include <linux/init.h> +#include <linux/errno.h> +#include <linux/pci.h> +#include <linux/dma-mapping.h> +#include <linux/slab.h> +#include <linux/io-mapping.h> +#include <linux/mlx5/driver.h> +#include <linux/mlx5/cq.h> +#include <linux/mlx5/qp.h> +#include <linux/mlx5/srq.h> +#include <linux/debugfs.h> +#include "mlx5_core.h" + +#define DRIVER_NAME "mlx5_core" +#define DRIVER_VERSION "1.0" +#define DRIVER_RELDATE "June 2013" + +MODULE_AUTHOR("Eli Cohen <eli@mellanox.com>"); +MODULE_DESCRIPTION("Mellanox ConnectX-IB HCA core library"); +MODULE_LICENSE("Dual BSD/GPL"); +MODULE_VERSION(DRIVER_VERSION); + +int mlx5_core_debug_mask; +module_param_named(debug_mask, mlx5_core_debug_mask, int, 0644); +MODULE_PARM_DESC(debug_mask, "debug mask: 1 = dump cmd data, 2 = dump cmd exec time, 3 = both. Default=0"); + +struct workqueue_struct *mlx5_core_wq; + +static int set_dma_caps(struct pci_dev *pdev) +{ + int err; + + err = pci_set_dma_mask(pdev, DMA_BIT_MASK(64)); + if (err) { + dev_warn(&pdev->dev, "Warning: couldn't set 64-bit PCI DMA mask.\n"); + err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32)); + if (err) { + dev_err(&pdev->dev, "Can't set PCI DMA mask, aborting.\n"); + return err; + } + } + + err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)); + if (err) { + dev_warn(&pdev->dev, + "Warning: couldn't set 64-bit consistent PCI DMA mask.\n"); + err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)); + if (err) { + dev_err(&pdev->dev, + "Can't set consistent PCI DMA mask, aborting.\n"); + return err; + } + } + + dma_set_max_seg_size(&pdev->dev, 2u * 1024 * 1024 * 1024); + return err; +} + +static int request_bar(struct pci_dev *pdev) +{ + int err = 0; + + if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) { + dev_err(&pdev->dev, "Missing registers BAR, aborting.\n"); + return -ENODEV; + } + + err = pci_request_regions(pdev, DRIVER_NAME); + if (err) + dev_err(&pdev->dev, "Couldn't get PCI resources, aborting\n"); + + return err; +} + +static void release_bar(struct pci_dev *pdev) +{ + pci_release_regions(pdev); +} + +static int mlx5_enable_msix(struct mlx5_core_dev *dev) +{ + struct mlx5_eq_table *table = &dev->priv.eq_table; + int num_eqs = 1 << dev->caps.log_max_eq; + int nvec; + int err; + int i; + + nvec = dev->caps.num_ports * num_online_cpus() + MLX5_EQ_VEC_COMP_BASE; + nvec = min_t(int, nvec, num_eqs); + if (nvec <= MLX5_EQ_VEC_COMP_BASE) + return -ENOMEM; + + table->msix_arr = kzalloc(nvec * sizeof(*table->msix_arr), GFP_KERNEL); + if (!table->msix_arr) + return -ENOMEM; + + for (i = 0; i < nvec; i++) + table->msix_arr[i].entry = i; + +retry: + table->num_comp_vectors = nvec - MLX5_EQ_VEC_COMP_BASE; + err = pci_enable_msix(dev->pdev, table->msix_arr, nvec); + if (err <= 0) { + return err; + } else if (err > 2) { + nvec = err; + goto retry; + } + + mlx5_core_dbg(dev, "received %d MSI vectors out of %d requested\n", err, nvec); + + return 0; +} + +static void mlx5_disable_msix(struct mlx5_core_dev *dev) +{ + struct mlx5_eq_table *table = &dev->priv.eq_table; + + pci_disable_msix(dev->pdev); + kfree(table->msix_arr); +} + +struct mlx5_reg_host_endianess { + u8 he; + u8 rsvd[15]; +}; + +static int handle_hca_cap(struct mlx5_core_dev *dev) +{ + struct mlx5_cmd_query_hca_cap_mbox_out *query_out = NULL; + struct mlx5_cmd_set_hca_cap_mbox_in *set_ctx = NULL; + struct mlx5_cmd_query_hca_cap_mbox_in query_ctx; + struct mlx5_cmd_set_hca_cap_mbox_out set_out; + struct mlx5_profile *prof = dev->profile; + u64 flags; + int csum = 1; + int err; + + memset(&query_ctx, 0, sizeof(query_ctx)); + query_out = kzalloc(sizeof(*query_out), GFP_KERNEL); + if (!query_out) + return -ENOMEM; + + set_ctx = kzalloc(sizeof(*set_ctx), GFP_KERNEL); + if (!set_ctx) { + err = -ENOMEM; + goto query_ex; + } + + query_ctx.hdr.opcode = cpu_to_be16(MLX5_CMD_OP_QUERY_HCA_CAP); + query_ctx.hdr.opmod = cpu_to_be16(0x1); + err = mlx5_cmd_exec(dev, &query_ctx, sizeof(query_ctx), + query_out, sizeof(*query_out)); + if (err) + goto query_ex; + + err = mlx5_cmd_status_to_err(&query_out->hdr); + if (err) { + mlx5_core_warn(dev, "query hca cap failed, %d\n", err); + goto query_ex; + } + + memcpy(&set_ctx->hca_cap, &query_out->hca_cap, + sizeof(set_ctx->hca_cap)); + + if (prof->mask & MLX5_PROF_MASK_CMDIF_CSUM) { + csum = !!prof->cmdif_csum; + flags = be64_to_cpu(set_ctx->hca_cap.flags); + if (csum) + flags |= MLX5_DEV_CAP_FLAG_CMDIF_CSUM; + else + flags &= ~MLX5_DEV_CAP_FLAG_CMDIF_CSUM; + + set_ctx->hca_cap.flags = cpu_to_be64(flags); + } + + if (dev->profile->mask & MLX5_PROF_MASK_QP_SIZE) + set_ctx->hca_cap.log_max_qp = dev->profile->log_max_qp; + + memset(&set_out, 0, sizeof(set_out)); + set_ctx->hca_cap.uar_page_sz = cpu_to_be16(PAGE_SHIFT - 12); + set_ctx->hdr.opcode = cpu_to_be16(MLX5_CMD_OP_SET_HCA_CAP); + err = mlx5_cmd_exec(dev, set_ctx, sizeof(*set_ctx), + &set_out, sizeof(set_out)); + if (err) { + mlx5_core_warn(dev, "set hca cap failed, %d\n", err); + goto query_ex; + } + + err = mlx5_cmd_status_to_err(&set_out.hdr); + if (err) + goto query_ex; + + if (!csum) + dev->cmd.checksum_disabled = 1; + +query_ex: + kfree(query_out); + kfree(set_ctx); + + return err; +} + +static int set_hca_ctrl(struct mlx5_core_dev *dev) +{ + struct mlx5_reg_host_endianess he_in; + struct mlx5_reg_host_endianess he_out; + int err; + + memset(&he_in, 0, sizeof(he_in)); + he_in.he = MLX5_SET_HOST_ENDIANNESS; + err = mlx5_core_access_reg(dev, &he_in, sizeof(he_in), + &he_out, sizeof(he_out), + MLX5_REG_HOST_ENDIANNESS, 0, 1); + return err; +} + +int mlx5_dev_init(struct mlx5_core_dev *dev, struct pci_dev *pdev) +{ + struct mlx5_priv *priv = &dev->priv; + int err; + + dev->pdev = pdev; + pci_set_drvdata(dev->pdev, dev); + strncpy(priv->name, dev_name(&pdev->dev), MLX5_MAX_NAME_LEN); + priv->name[MLX5_MAX_NAME_LEN - 1] = 0; + + mutex_init(&priv->pgdir_mutex); + INIT_LIST_HEAD(&priv->pgdir_list); + spin_lock_init(&priv->mkey_lock); + + priv->dbg_root = debugfs_create_dir(dev_name(&pdev->dev), mlx5_debugfs_root); + if (!priv->dbg_root) + return -ENOMEM; + + err = pci_enable_device(pdev); + if (err) { + dev_err(&pdev->dev, "Cannot enable PCI device, aborting.\n"); + goto err_dbg; + } + + err = request_bar(pdev); + if (err) { + dev_err(&pdev->dev, "error requesting BARs, aborting.\n"); + goto err_disable; + } + + pci_set_master(pdev); + + err = set_dma_caps(pdev); + if (err) { + dev_err(&pdev->dev, "Failed setting DMA capabilities mask, aborting\n"); + goto err_clr_master; + } + + dev->iseg_base = pci_resource_start(dev->pdev, 0); + dev->iseg = ioremap(dev->iseg_base, sizeof(*dev->iseg)); + if (!dev->iseg) { + err = -ENOMEM; + dev_err(&pdev->dev, "Failed mapping initialization segment, aborting\n"); + goto err_clr_master; + } + dev_info(&pdev->dev, "firmware version: %d.%d.%d\n", fw_rev_maj(dev), + fw_rev_min(dev), fw_rev_sub(dev)); + + err = mlx5_cmd_init(dev); + if (err) { + dev_err(&pdev->dev, "Failed initializing command interface, aborting\n"); + goto err_unmap; + } + + mlx5_pagealloc_init(dev); + err = set_hca_ctrl(dev); + if (err) { + dev_err(&pdev->dev, "set_hca_ctrl failed\n"); + goto err_pagealloc_cleanup; + } + + err = handle_hca_cap(dev); + if (err) { + dev_err(&pdev->dev, "handle_hca_cap failed\n"); + goto err_pagealloc_cleanup; + } + + err = mlx5_satisfy_startup_pages(dev); + if (err) { + dev_err(&pdev->dev, "failed to allocate startup pages\n"); + goto err_pagealloc_cleanup; + } + + err = mlx5_pagealloc_start(dev); + if (err) { + dev_err(&pdev->dev, "mlx5_pagealloc_start failed\n"); + goto err_reclaim_pages; + } + + err = mlx5_cmd_init_hca(dev); + if (err) { + dev_err(&pdev->dev, "init hca failed\n"); + goto err_pagealloc_stop; + } + + mlx5_start_health_poll(dev); + + err = mlx5_cmd_query_hca_cap(dev, &dev->caps); + if (err) { + dev_err(&pdev->dev, "query hca failed\n"); + goto err_stop_poll; + } + + err = mlx5_cmd_query_adapter(dev); + if (err) { + dev_err(&pdev->dev, "query adapter failed\n"); + goto err_stop_poll; + } + + err = mlx5_enable_msix(dev); + if (err) { + dev_err(&pdev->dev, "enable msix failed\n"); + goto err_stop_poll; + } + + err = mlx5_eq_init(dev); + if (err) { + dev_err(&pdev->dev, "failed to initialize eq\n"); + goto disable_msix; + } + + err = mlx5_alloc_uuars(dev, &priv->uuari); + if (err) { + dev_err(&pdev->dev, "Failed allocating uar, aborting\n"); + goto err_eq_cleanup; + } + + err = mlx5_start_eqs(dev); + if (err) { + dev_err(&pdev->dev, "Failed to start pages and async EQs\n"); + goto err_free_uar; + } + + MLX5_INIT_DOORBELL_LOCK(&priv->cq_uar_lock); + + mlx5_init_cq_table(dev); + mlx5_init_qp_table(dev); + mlx5_init_srq_table(dev); + + return 0; + +err_free_uar: + mlx5_free_uuars(dev, &priv->uuari); + +err_eq_cleanup: + mlx5_eq_cleanup(dev); + +disable_msix: + mlx5_disable_msix(dev); + +err_stop_poll: + mlx5_stop_health_poll(dev); + mlx5_cmd_teardown_hca(dev); + +err_pagealloc_stop: + mlx5_pagealloc_stop(dev); + +err_reclaim_pages: + mlx5_reclaim_startup_pages(dev); + +err_pagealloc_cleanup: + mlx5_pagealloc_cleanup(dev); + mlx5_cmd_cleanup(dev); + +err_unmap: + iounmap(dev->iseg); + +err_clr_master: + pci_clear_master(dev->pdev); + release_bar(dev->pdev); + +err_disable: + pci_disable_device(dev->pdev); + +err_dbg: + debugfs_remove(priv->dbg_root); + return err; +} +EXPORT_SYMBOL(mlx5_dev_init); + +void mlx5_dev_cleanup(struct mlx5_core_dev *dev) +{ + struct mlx5_priv *priv = &dev->priv; + + mlx5_cleanup_srq_table(dev); + mlx5_cleanup_qp_table(dev); + mlx5_cleanup_cq_table(dev); + mlx5_stop_eqs(dev); + mlx5_free_uuars(dev, &priv->uuari); + mlx5_eq_cleanup(dev); + mlx5_disable_msix(dev); + mlx5_stop_health_poll(dev); + mlx5_cmd_teardown_hca(dev); + mlx5_pagealloc_stop(dev); + mlx5_reclaim_startup_pages(dev); + mlx5_pagealloc_cleanup(dev); + mlx5_cmd_cleanup(dev); + iounmap(dev->iseg); + pci_clear_master(dev->pdev); + release_bar(dev->pdev); + pci_disable_device(dev->pdev); + debugfs_remove(priv->dbg_root); +} +EXPORT_SYMBOL(mlx5_dev_cleanup); + +static int __init init(void) +{ + int err; + + mlx5_register_debugfs(); + mlx5_core_wq = create_singlethread_workqueue("mlx5_core_wq"); + if (!mlx5_core_wq) { + err = -ENOMEM; + goto err_debug; + } + mlx5_health_init(); + + return 0; + + mlx5_health_cleanup(); +err_debug: + mlx5_unregister_debugfs(); + return err; +} + +static void __exit cleanup(void) +{ + mlx5_health_cleanup(); + destroy_workqueue(mlx5_core_wq); + mlx5_unregister_debugfs(); +} + +module_init(init); +module_exit(cleanup); diff --git a/drivers/net/ethernet/mellanox/mlx5/core/mcg.c b/drivers/net/ethernet/mellanox/mlx5/core/mcg.c new file mode 100644 index 000000000000..44837640bd7c --- /dev/null +++ b/drivers/net/ethernet/mellanox/mlx5/core/mcg.c @@ -0,0 +1,106 @@ +/* + * Copyright (c) 2013, Mellanox Technologies inc. All rights reserved. + * + * This software is available to you under a choice of one of two + * licenses. You may choose to be licensed under the terms of the GNU + * General Public License (GPL) Version 2, available from the file + * COPYING in the main directory of this source tree, or the + * OpenIB.org BSD license below: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * - Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * - Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/mlx5/driver.h> +#include <linux/mlx5/cmd.h> +#include <rdma/ib_verbs.h> +#include "mlx5_core.h" + +struct mlx5_attach_mcg_mbox_in { + struct mlx5_inbox_hdr hdr; + __be32 qpn; + __be32 rsvd; + u8 gid[16]; +}; + +struct mlx5_attach_mcg_mbox_out { + struct mlx5_outbox_hdr hdr; + u8 rsvf[8]; +}; + +struct mlx5_detach_mcg_mbox_in { + struct mlx5_inbox_hdr hdr; + __be32 qpn; + __be32 rsvd; + u8 gid[16]; +}; + +struct mlx5_detach_mcg_mbox_out { + struct mlx5_outbox_hdr hdr; + u8 rsvf[8]; +}; + +int mlx5_core_attach_mcg(struct mlx5_core_dev *dev, union ib_gid *mgid, u32 qpn) +{ + struct mlx5_attach_mcg_mbox_in in; + struct mlx5_attach_mcg_mbox_out out; + int err; + + memset(&in, 0, sizeof(in)); + memset(&out, 0, sizeof(out)); + in.hdr.opcode = cpu_to_be16(MLX5_CMD_OP_ATTACH_TO_MCG); + memcpy(in.gid, mgid, sizeof(*mgid)); + in.qpn = cpu_to_be32(qpn); + err = mlx5_cmd_exec(dev, &in, sizeof(in), &out, sizeof(out)); + if (err) + return err; + + if (out.hdr.status) + err = mlx5_cmd_status_to_err(&out.hdr); + + return err; +} +EXPORT_SYMBOL(mlx5_core_attach_mcg); + +int mlx5_core_detach_mcg(struct mlx5_core_dev *dev, union ib_gid *mgid, u32 qpn) +{ + struct mlx5_detach_mcg_mbox_in in; + struct mlx5_detach_mcg_mbox_out out; + int err; + + memset(&in, 0, sizeof(in)); + memset(&out, 0, sizeof(out)); + in.hdr.opcode = cpu_to_be16(MLX5_CMD_OP_DETACH_FROM_MCG); + memcpy(in.gid, mgid, sizeof(*mgid)); + in.qpn = cpu_to_be32(qpn); + err = mlx5_cmd_exec(dev, &in, sizeof(in), &out, sizeof(out)); + if (err) + return err; + + if (out.hdr.status) + err = mlx5_cmd_status_to_err(&out.hdr); + + return err; +} +EXPORT_SYMBOL(mlx5_core_detach_mcg); diff --git a/drivers/net/ethernet/mellanox/mlx5/core/mlx5_core.h b/drivers/net/ethernet/mellanox/mlx5/core/mlx5_core.h new file mode 100644 index 000000000000..68b74e1ae1b0 --- /dev/null +++ b/drivers/net/ethernet/mellanox/mlx5/core/mlx5_core.h @@ -0,0 +1,73 @@ +/* + * Copyright (c) 2013, Mellanox Technologies inc. All rights reserved. + * + * This software is available to you under a choice of one of two + * licenses. You may choose to be licensed under the terms of the GNU + * General Public License (GPL) Version 2, available from the file + * COPYING in the main directory of this source tree, or the + * OpenIB.org BSD license below: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * - Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * - Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +#ifndef __MLX5_CORE_H__ +#define __MLX5_CORE_H__ + +#include <linux/types.h> +#include <linux/kernel.h> +#include <linux/sched.h> + +extern int mlx5_core_debug_mask; + +#define mlx5_core_dbg(dev, format, arg...) \ +pr_debug("%s:%s:%d:(pid %d): " format, (dev)->priv.name, __func__, __LINE__, \ + current->pid, ##arg) + +#define mlx5_core_dbg_mask(dev, mask, format, arg...) \ +do { \ + if ((mask) & mlx5_core_debug_mask) \ + pr_debug("%s:%s:%d:(pid %d): " format, (dev)->priv.name, \ + __func__, __LINE__, current->pid, ##arg); \ +} while (0) + +#define mlx5_core_err(dev, format, arg...) \ +pr_err("%s:%s:%d:(pid %d): " format, (dev)->priv.name, __func__, __LINE__, \ + current->pid, ##arg) + +#define mlx5_core_warn(dev, format, arg...) \ +pr_warn("%s:%s:%d:(pid %d): " format, (dev)->priv.name, __func__, __LINE__, \ + current->pid, ##arg) + +enum { + MLX5_CMD_DATA, /* print command payload only */ + MLX5_CMD_TIME, /* print command execution time */ +}; + + +int mlx5_cmd_query_hca_cap(struct mlx5_core_dev *dev, + struct mlx5_caps *caps); +int mlx5_cmd_query_adapter(struct mlx5_core_dev *dev); +int mlx5_cmd_init_hca(struct mlx5_core_dev *dev); +int mlx5_cmd_teardown_hca(struct mlx5_core_dev *dev); + +#endif /* __MLX5_CORE_H__ */ diff --git a/drivers/net/ethernet/mellanox/mlx5/core/mr.c b/drivers/net/ethernet/mellanox/mlx5/core/mr.c new file mode 100644 index 000000000000..5b44e2e46daf --- /dev/null +++ b/drivers/net/ethernet/mellanox/mlx5/core/mr.c @@ -0,0 +1,136 @@ +/* + * Copyright (c) 2013, Mellanox Technologies inc. All rights reserved. + * + * This software is available to you under a choice of one of two + * licenses. You may choose to be licensed under the terms of the GNU + * General Public License (GPL) Version 2, available from the file + * COPYING in the main directory of this source tree, or the + * OpenIB.org BSD license below: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * - Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * - Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/mlx5/driver.h> +#include <linux/mlx5/cmd.h> +#include "mlx5_core.h" + +int mlx5_core_create_mkey(struct mlx5_core_dev *dev, struct mlx5_core_mr *mr, + struct mlx5_create_mkey_mbox_in *in, int inlen) +{ + struct mlx5_create_mkey_mbox_out out; + int err; + u8 key; + + memset(&out, 0, sizeof(out)); + spin_lock(&dev->priv.mkey_lock); + key = dev->priv.mkey_key++; + spin_unlock(&dev->priv.mkey_lock); + in->seg.qpn_mkey7_0 |= cpu_to_be32(key); + in->hdr.opcode = cpu_to_be16(MLX5_CMD_OP_CREATE_MKEY); + err = mlx5_cmd_exec(dev, in, inlen, &out, sizeof(out)); + if (err) { + mlx5_core_dbg(dev, "cmd exec faile %d\n", err); + return err; + } + + if (out.hdr.status) { + mlx5_core_dbg(dev, "status %d\n", out.hdr.status); + return mlx5_cmd_status_to_err(&out.hdr); + } + + mr->key = mlx5_idx_to_mkey(be32_to_cpu(out.mkey) & 0xffffff) | key; + mlx5_core_dbg(dev, "out 0x%x, key 0x%x, mkey 0x%x\n", be32_to_cpu(out.mkey), key, mr->key); + + return err; +} +EXPORT_SYMBOL(mlx5_core_create_mkey); + +int mlx5_core_destroy_mkey(struct mlx5_core_dev *dev, struct mlx5_core_mr *mr) +{ + struct mlx5_destroy_mkey_mbox_in in; + struct mlx5_destroy_mkey_mbox_out out; + int err; + + memset(&in, 0, sizeof(in)); + memset(&out, 0, sizeof(out)); + + in.hdr.opcode = cpu_to_be16(MLX5_CMD_OP_DESTROY_MKEY); + in.mkey = cpu_to_be32(mlx5_mkey_to_idx(mr->key)); + err = mlx5_cmd_exec(dev, &in, sizeof(in), &out, sizeof(out)); + if (err) + return err; + + if (out.hdr.status) + return mlx5_cmd_status_to_err(&out.hdr); + + return err; +} +EXPORT_SYMBOL(mlx5_core_destroy_mkey); + +int mlx5_core_query_mkey(struct mlx5_core_dev *dev, struct mlx5_core_mr *mr, + struct mlx5_query_mkey_mbox_out *out, int outlen) +{ + struct mlx5_destroy_mkey_mbox_in in; + int err; + + memset(&in, 0, sizeof(in)); + memset(out, 0, outlen); + + in.hdr.opcode = cpu_to_be16(MLX5_CMD_OP_QUERY_MKEY); + in.mkey = cpu_to_be32(mlx5_mkey_to_idx(mr->key)); + err = mlx5_cmd_exec(dev, &in, sizeof(in), out, outlen); + if (err) + return err; + + if (out->hdr.status) + return mlx5_cmd_status_to_err(&out->hdr); + + return err; +} +EXPORT_SYMBOL(mlx5_core_query_mkey); + +int mlx5_core_dump_fill_mkey(struct mlx5_core_dev *dev, struct mlx5_core_mr *mr, + u32 *mkey) +{ + struct mlx5_query_special_ctxs_mbox_in in; + struct mlx5_query_special_ctxs_mbox_out out; + int err; + + memset(&in, 0, sizeof(in)); + memset(&out, 0, sizeof(out)); + + in.hdr.opcode = cpu_to_be16(MLX5_CMD_OP_QUERY_SPECIAL_CONTEXTS); + err = mlx5_cmd_exec(dev, &in, sizeof(in), &out, sizeof(out)); + if (err) + return err; + + if (out.hdr.status) + return mlx5_cmd_status_to_err(&out.hdr); + + *mkey = be32_to_cpu(out.dump_fill_mkey); + + return err; +} +EXPORT_SYMBOL(mlx5_core_dump_fill_mkey); diff --git a/drivers/net/ethernet/mellanox/mlx5/core/pagealloc.c b/drivers/net/ethernet/mellanox/mlx5/core/pagealloc.c new file mode 100644 index 000000000000..f0bf46339b28 --- /dev/null +++ b/drivers/net/ethernet/mellanox/mlx5/core/pagealloc.c @@ -0,0 +1,435 @@ +/* + * Copyright (c) 2013, Mellanox Technologies inc. All rights reserved. + * + * This software is available to you under a choice of one of two + * licenses. You may choose to be licensed under the terms of the GNU + * General Public License (GPL) Version 2, available from the file + * COPYING in the main directory of this source tree, or the + * OpenIB.org BSD license below: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * - Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * - Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +#include <asm-generic/kmap_types.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/mlx5/driver.h> +#include <linux/mlx5/cmd.h> +#include "mlx5_core.h" + +enum { + MLX5_PAGES_CANT_GIVE = 0, + MLX5_PAGES_GIVE = 1, + MLX5_PAGES_TAKE = 2 +}; + +struct mlx5_pages_req { + struct mlx5_core_dev *dev; + u32 func_id; + s16 npages; + struct work_struct work; +}; + +struct fw_page { + struct rb_node rb_node; + u64 addr; + struct page *page; + u16 func_id; +}; + +struct mlx5_query_pages_inbox { + struct mlx5_inbox_hdr hdr; + u8 rsvd[8]; +}; + +struct mlx5_query_pages_outbox { + struct mlx5_outbox_hdr hdr; + u8 reserved[2]; + __be16 func_id; + __be16 init_pages; + __be16 num_pages; +}; + +struct mlx5_manage_pages_inbox { + struct mlx5_inbox_hdr hdr; + __be16 rsvd0; + __be16 func_id; + __be16 rsvd1; + __be16 num_entries; + u8 rsvd2[16]; + __be64 pas[0]; +}; + +struct mlx5_manage_pages_outbox { + struct mlx5_outbox_hdr hdr; + u8 rsvd0[2]; + __be16 num_entries; + u8 rsvd1[20]; + __be64 pas[0]; +}; + +static int insert_page(struct mlx5_core_dev *dev, u64 addr, struct page *page, u16 func_id) +{ + struct rb_root *root = &dev->priv.page_root; + struct rb_node **new = &root->rb_node; + struct rb_node *parent = NULL; + struct fw_page *nfp; + struct fw_page *tfp; + + while (*new) { + parent = *new; + tfp = rb_entry(parent, struct fw_page, rb_node); + if (tfp->addr < addr) + new = &parent->rb_left; + else if (tfp->addr > addr) + new = &parent->rb_right; + else + return -EEXIST; + } + + nfp = kmalloc(sizeof(*nfp), GFP_KERNEL); + if (!nfp) + return -ENOMEM; + + nfp->addr = addr; + nfp->page = page; + nfp->func_id = func_id; + + rb_link_node(&nfp->rb_node, parent, new); + rb_insert_color(&nfp->rb_node, root); + + return 0; +} + +static struct page *remove_page(struct mlx5_core_dev *dev, u64 addr) +{ + struct rb_root *root = &dev->priv.page_root; + struct rb_node *tmp = root->rb_node; + struct page *result = NULL; + struct fw_page *tfp; + + while (tmp) { + tfp = rb_entry(tmp, struct fw_page, rb_node); + if (tfp->addr < addr) { + tmp = tmp->rb_left; + } else if (tfp->addr > addr) { + tmp = tmp->rb_right; + } else { + rb_erase(&tfp->rb_node, root); + result = tfp->page; + kfree(tfp); + break; + } + } + + return result; +} + +static int mlx5_cmd_query_pages(struct mlx5_core_dev *dev, u16 *func_id, + s16 *pages, s16 *init_pages) +{ + struct mlx5_query_pages_inbox in; + struct mlx5_query_pages_outbox out; + int err; + + memset(&in, 0, sizeof(in)); + memset(&out, 0, sizeof(out)); + in.hdr.opcode = cpu_to_be16(MLX5_CMD_OP_QUERY_PAGES); + err = mlx5_cmd_exec(dev, &in, sizeof(in), &out, sizeof(out)); + if (err) + return err; + + if (out.hdr.status) + return mlx5_cmd_status_to_err(&out.hdr); + + if (pages) + *pages = be16_to_cpu(out.num_pages); + if (init_pages) + *init_pages = be16_to_cpu(out.init_pages); + *func_id = be16_to_cpu(out.func_id); + + return err; +} + +static int give_pages(struct mlx5_core_dev *dev, u16 func_id, int npages, + int notify_fail) +{ + struct mlx5_manage_pages_inbox *in; + struct mlx5_manage_pages_outbox out; + struct page *page; + int inlen; + u64 addr; + int err; + int i; + + inlen = sizeof(*in) + npages * sizeof(in->pas[0]); + in = mlx5_vzalloc(inlen); + if (!in) { + mlx5_core_warn(dev, "vzalloc failed %d\n", inlen); + return -ENOMEM; + } + memset(&out, 0, sizeof(out)); + + for (i = 0; i < npages; i++) { + page = alloc_page(GFP_HIGHUSER); + if (!page) { + err = -ENOMEM; + mlx5_core_warn(dev, "failed to allocate page\n"); + goto out_alloc; + } + addr = dma_map_page(&dev->pdev->dev, page, 0, + PAGE_SIZE, DMA_BIDIRECTIONAL); + if (dma_mapping_error(&dev->pdev->dev, addr)) { + mlx5_core_warn(dev, "failed dma mapping page\n"); + __free_page(page); + err = -ENOMEM; + goto out_alloc; + } + err = insert_page(dev, addr, page, func_id); + if (err) { + mlx5_core_err(dev, "failed to track allocated page\n"); + dma_unmap_page(&dev->pdev->dev, addr, PAGE_SIZE, DMA_BIDIRECTIONAL); + __free_page(page); + err = -ENOMEM; + goto out_alloc; + } + in->pas[i] = cpu_to_be64(addr); + } + + in->hdr.opcode = cpu_to_be16(MLX5_CMD_OP_MANAGE_PAGES); + in->hdr.opmod = cpu_to_be16(MLX5_PAGES_GIVE); + in->func_id = cpu_to_be16(func_id); + in->num_entries = cpu_to_be16(npages); + err = mlx5_cmd_exec(dev, in, inlen, &out, sizeof(out)); + mlx5_core_dbg(dev, "err %d\n", err); + if (err) { + mlx5_core_warn(dev, "func_id 0x%x, npages %d, err %d\n", func_id, npages, err); + goto out_alloc; + } + dev->priv.fw_pages += npages; + + if (out.hdr.status) { + err = mlx5_cmd_status_to_err(&out.hdr); + if (err) { + mlx5_core_warn(dev, "func_id 0x%x, npages %d, status %d\n", func_id, npages, out.hdr.status); + goto out_alloc; + } + } + + mlx5_core_dbg(dev, "err %d\n", err); + + goto out_free; + +out_alloc: + if (notify_fail) { + memset(in, 0, inlen); + memset(&out, 0, sizeof(out)); + in->hdr.opcode = cpu_to_be16(MLX5_CMD_OP_MANAGE_PAGES); + in->hdr.opmod = cpu_to_be16(MLX5_PAGES_CANT_GIVE); + if (mlx5_cmd_exec(dev, in, sizeof(*in), &out, sizeof(out))) + mlx5_core_warn(dev, "\n"); + } + for (i--; i >= 0; i--) { + addr = be64_to_cpu(in->pas[i]); + page = remove_page(dev, addr); + if (!page) { + mlx5_core_err(dev, "BUG: can't remove page at addr 0x%llx\n", + addr); + continue; + } + dma_unmap_page(&dev->pdev->dev, addr, PAGE_SIZE, DMA_BIDIRECTIONAL); + __free_page(page); + } + +out_free: + mlx5_vfree(in); + return err; +} + +static int reclaim_pages(struct mlx5_core_dev *dev, u32 func_id, int npages, + int *nclaimed) +{ + struct mlx5_manage_pages_inbox in; + struct mlx5_manage_pages_outbox *out; + struct page *page; + int num_claimed; + int outlen; + u64 addr; + int err; + int i; + + memset(&in, 0, sizeof(in)); + outlen = sizeof(*out) + npages * sizeof(out->pas[0]); + out = mlx5_vzalloc(outlen); + if (!out) + return -ENOMEM; + + in.hdr.opcode = cpu_to_be16(MLX5_CMD_OP_MANAGE_PAGES); + in.hdr.opmod = cpu_to_be16(MLX5_PAGES_TAKE); + in.func_id = cpu_to_be16(func_id); + in.num_entries = cpu_to_be16(npages); + mlx5_core_dbg(dev, "npages %d, outlen %d\n", npages, outlen); + err = mlx5_cmd_exec(dev, &in, sizeof(in), out, outlen); + if (err) { + mlx5_core_err(dev, "failed recliaming pages\n"); + goto out_free; + } + dev->priv.fw_pages -= npages; + + if (out->hdr.status) { + err = mlx5_cmd_status_to_err(&out->hdr); + goto out_free; + } + + num_claimed = be16_to_cpu(out->num_entries); + if (nclaimed) + *nclaimed = num_claimed; + + for (i = 0; i < num_claimed; i++) { + addr = be64_to_cpu(out->pas[i]); + page = remove_page(dev, addr); + if (!page) { + mlx5_core_warn(dev, "FW reported unknown DMA address 0x%llx\n", addr); + } else { + dma_unmap_page(&dev->pdev->dev, addr, PAGE_SIZE, DMA_BIDIRECTIONAL); + __free_page(page); + } + } + +out_free: + mlx5_vfree(out); + return err; +} + +static void pages_work_handler(struct work_struct *work) +{ + struct mlx5_pages_req *req = container_of(work, struct mlx5_pages_req, work); + struct mlx5_core_dev *dev = req->dev; + int err = 0; + + if (req->npages < 0) + err = reclaim_pages(dev, req->func_id, -1 * req->npages, NULL); + else if (req->npages > 0) + err = give_pages(dev, req->func_id, req->npages, 1); + + if (err) + mlx5_core_warn(dev, "%s fail %d\n", req->npages < 0 ? + "reclaim" : "give", err); + + kfree(req); +} + +void mlx5_core_req_pages_handler(struct mlx5_core_dev *dev, u16 func_id, + s16 npages) +{ + struct mlx5_pages_req *req; + + req = kzalloc(sizeof(*req), GFP_ATOMIC); + if (!req) { + mlx5_core_warn(dev, "failed to allocate pages request\n"); + return; + } + + req->dev = dev; + req->func_id = func_id; + req->npages = npages; + INIT_WORK(&req->work, pages_work_handler); + queue_work(dev->priv.pg_wq, &req->work); +} + +int mlx5_satisfy_startup_pages(struct mlx5_core_dev *dev) +{ + s16 uninitialized_var(init_pages); + u16 uninitialized_var(func_id); + int err; + + err = mlx5_cmd_query_pages(dev, &func_id, NULL, &init_pages); + if (err) + return err; + + mlx5_core_dbg(dev, "requested %d init pages for func_id 0x%x\n", init_pages, func_id); + + return give_pages(dev, func_id, init_pages, 0); +} + +static int optimal_reclaimed_pages(void) +{ + struct mlx5_cmd_prot_block *block; + struct mlx5_cmd_layout *lay; + int ret; + + ret = (sizeof(lay->in) + sizeof(block->data) - + sizeof(struct mlx5_manage_pages_outbox)) / 8; + + return ret; +} + +int mlx5_reclaim_startup_pages(struct mlx5_core_dev *dev) +{ + unsigned long end = jiffies + msecs_to_jiffies(5000); + struct fw_page *fwp; + struct rb_node *p; + int err; + + do { + p = rb_first(&dev->priv.page_root); + if (p) { + fwp = rb_entry(p, struct fw_page, rb_node); + err = reclaim_pages(dev, fwp->func_id, optimal_reclaimed_pages(), NULL); + if (err) { + mlx5_core_warn(dev, "failed reclaiming pages (%d)\n", err); + return err; + } + } + if (time_after(jiffies, end)) { + mlx5_core_warn(dev, "FW did not return all pages. giving up...\n"); + break; + } + } while (p); + + return 0; +} + +void mlx5_pagealloc_init(struct mlx5_core_dev *dev) +{ + dev->priv.page_root = RB_ROOT; +} + +void mlx5_pagealloc_cleanup(struct mlx5_core_dev *dev) +{ + /* nothing */ +} + +int mlx5_pagealloc_start(struct mlx5_core_dev *dev) +{ + dev->priv.pg_wq = create_singlethread_workqueue("mlx5_page_allocator"); + if (!dev->priv.pg_wq) + return -ENOMEM; + + return 0; +} + +void mlx5_pagealloc_stop(struct mlx5_core_dev *dev) +{ + destroy_workqueue(dev->priv.pg_wq); +} diff --git a/drivers/net/ethernet/mellanox/mlx5/core/pd.c b/drivers/net/ethernet/mellanox/mlx5/core/pd.c new file mode 100644 index 000000000000..790da5c4ca4f --- /dev/null +++ b/drivers/net/ethernet/mellanox/mlx5/core/pd.c @@ -0,0 +1,101 @@ +/* + * Copyright (c) 2013, Mellanox Technologies inc. All rights reserved. + * + * This software is available to you under a choice of one of two + * licenses. You may choose to be licensed under the terms of the GNU + * General Public License (GPL) Version 2, available from the file + * COPYING in the main directory of this source tree, or the + * OpenIB.org BSD license below: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * - Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * - Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/mlx5/driver.h> +#include <linux/mlx5/cmd.h> +#include "mlx5_core.h" + +struct mlx5_alloc_pd_mbox_in { + struct mlx5_inbox_hdr hdr; + u8 rsvd[8]; +}; + +struct mlx5_alloc_pd_mbox_out { + struct mlx5_outbox_hdr hdr; + __be32 pdn; + u8 rsvd[4]; +}; + +struct mlx5_dealloc_pd_mbox_in { + struct mlx5_inbox_hdr hdr; + __be32 pdn; + u8 rsvd[4]; +}; + +struct mlx5_dealloc_pd_mbox_out { + struct mlx5_outbox_hdr hdr; + u8 rsvd[8]; +}; + +int mlx5_core_alloc_pd(struct mlx5_core_dev *dev, u32 *pdn) +{ + struct mlx5_alloc_pd_mbox_in in; + struct mlx5_alloc_pd_mbox_out out; + int err; + + memset(&in, 0, sizeof(in)); + memset(&out, 0, sizeof(out)); + in.hdr.opcode = cpu_to_be16(MLX5_CMD_OP_ALLOC_PD); + err = mlx5_cmd_exec(dev, &in, sizeof(in), &out, sizeof(out)); + if (err) + return err; + + if (out.hdr.status) + return mlx5_cmd_status_to_err(&out.hdr); + + *pdn = be32_to_cpu(out.pdn) & 0xffffff; + return err; +} +EXPORT_SYMBOL(mlx5_core_alloc_pd); + +int mlx5_core_dealloc_pd(struct mlx5_core_dev *dev, u32 pdn) +{ + struct mlx5_dealloc_pd_mbox_in in; + struct mlx5_dealloc_pd_mbox_out out; + int err; + + memset(&in, 0, sizeof(in)); + memset(&out, 0, sizeof(out)); + in.hdr.opcode = cpu_to_be16(MLX5_CMD_OP_DEALLOC_PD); + in.pdn = cpu_to_be32(pdn); + err = mlx5_cmd_exec(dev, &in, sizeof(in), &out, sizeof(out)); + if (err) + return err; + + if (out.hdr.status) + return mlx5_cmd_status_to_err(&out.hdr); + + return err; +} +EXPORT_SYMBOL(mlx5_core_dealloc_pd); diff --git a/drivers/net/ethernet/mellanox/mlx5/core/port.c b/drivers/net/ethernet/mellanox/mlx5/core/port.c new file mode 100644 index 000000000000..f6afe7b5a675 --- /dev/null +++ b/drivers/net/ethernet/mellanox/mlx5/core/port.c @@ -0,0 +1,104 @@ +/* + * Copyright (c) 2013, Mellanox Technologies inc. All rights reserved. + * + * This software is available to you under a choice of one of two + * licenses. You may choose to be licensed under the terms of the GNU + * General Public License (GPL) Version 2, available from the file + * COPYING in the main directory of this source tree, or the + * OpenIB.org BSD license below: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * - Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * - Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +#include <linux/module.h> +#include <linux/mlx5/driver.h> +#include <linux/mlx5/cmd.h> +#include "mlx5_core.h" + +int mlx5_core_access_reg(struct mlx5_core_dev *dev, void *data_in, + int size_in, void *data_out, int size_out, + u16 reg_num, int arg, int write) +{ + struct mlx5_access_reg_mbox_in *in = NULL; + struct mlx5_access_reg_mbox_out *out = NULL; + int err = -ENOMEM; + + in = mlx5_vzalloc(sizeof(*in) + size_in); + if (!in) + return -ENOMEM; + + out = mlx5_vzalloc(sizeof(*out) + size_out); + if (!out) + goto ex1; + + memcpy(in->data, data_in, size_in); + in->hdr.opcode = cpu_to_be16(MLX5_CMD_OP_ACCESS_REG); + in->hdr.opmod = cpu_to_be16(!write); + in->arg = cpu_to_be32(arg); + in->register_id = cpu_to_be16(reg_num); + err = mlx5_cmd_exec(dev, in, sizeof(*in) + size_in, out, + sizeof(out) + size_out); + if (err) + goto ex2; + + if (out->hdr.status) + err = mlx5_cmd_status_to_err(&out->hdr); + + if (!err) + memcpy(data_out, out->data, size_out); + +ex2: + mlx5_vfree(out); +ex1: + mlx5_vfree(in); + return err; +} +EXPORT_SYMBOL_GPL(mlx5_core_access_reg); + + +struct mlx5_reg_pcap { + u8 rsvd0; + u8 port_num; + u8 rsvd1[2]; + __be32 caps_127_96; + __be32 caps_95_64; + __be32 caps_63_32; + __be32 caps_31_0; +}; + +int mlx5_set_port_caps(struct mlx5_core_dev *dev, int port_num, u32 caps) +{ + struct mlx5_reg_pcap in; + struct mlx5_reg_pcap out; + int err; + + memset(&in, 0, sizeof(in)); + in.caps_127_96 = cpu_to_be32(caps); + in.port_num = port_num; + + err = mlx5_core_access_reg(dev, &in, sizeof(in), &out, + sizeof(out), MLX5_REG_PCAP, 0, 1); + + return err; +} +EXPORT_SYMBOL_GPL(mlx5_set_port_caps); diff --git a/drivers/net/ethernet/mellanox/mlx5/core/qp.c b/drivers/net/ethernet/mellanox/mlx5/core/qp.c new file mode 100644 index 000000000000..54faf8bfcaf4 --- /dev/null +++ b/drivers/net/ethernet/mellanox/mlx5/core/qp.c @@ -0,0 +1,301 @@ +/* + * Copyright (c) 2013, Mellanox Technologies inc. All rights reserved. + * + * This software is available to you under a choice of one of two + * licenses. You may choose to be licensed under the terms of the GNU + * General Public License (GPL) Version 2, available from the file + * COPYING in the main directory of this source tree, or the + * OpenIB.org BSD license below: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * - Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * - Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + + +#include <linux/gfp.h> +#include <linux/export.h> +#include <linux/mlx5/cmd.h> +#include <linux/mlx5/qp.h> +#include <linux/mlx5/driver.h> + +#include "mlx5_core.h" + +void mlx5_qp_event(struct mlx5_core_dev *dev, u32 qpn, int event_type) +{ + struct mlx5_qp_table *table = &dev->priv.qp_table; + struct mlx5_core_qp *qp; + + spin_lock(&table->lock); + + qp = radix_tree_lookup(&table->tree, qpn); + if (qp) + atomic_inc(&qp->refcount); + + spin_unlock(&table->lock); + + if (!qp) { + mlx5_core_warn(dev, "Async event for bogus QP 0x%x\n", qpn); + return; + } + + qp->event(qp, event_type); + + if (atomic_dec_and_test(&qp->refcount)) + complete(&qp->free); +} + +int mlx5_core_create_qp(struct mlx5_core_dev *dev, + struct mlx5_core_qp *qp, + struct mlx5_create_qp_mbox_in *in, + int inlen) +{ + struct mlx5_qp_table *table = &dev->priv.qp_table; + struct mlx5_create_qp_mbox_out out; + struct mlx5_destroy_qp_mbox_in din; + struct mlx5_destroy_qp_mbox_out dout; + int err; + + memset(&dout, 0, sizeof(dout)); + in->hdr.opcode = cpu_to_be16(MLX5_CMD_OP_CREATE_QP); + + err = mlx5_cmd_exec(dev, in, inlen, &out, sizeof(out)); + if (err) { + mlx5_core_warn(dev, "ret %d", err); + return err; + } + + if (out.hdr.status) { + pr_warn("current num of QPs 0x%x\n", atomic_read(&dev->num_qps)); + return mlx5_cmd_status_to_err(&out.hdr); + } + + qp->qpn = be32_to_cpu(out.qpn) & 0xffffff; + mlx5_core_dbg(dev, "qpn = 0x%x\n", qp->qpn); + + spin_lock_irq(&table->lock); + err = radix_tree_insert(&table->tree, qp->qpn, qp); + spin_unlock_irq(&table->lock); + if (err) { + mlx5_core_warn(dev, "err %d", err); + goto err_cmd; + } + + err = mlx5_debug_qp_add(dev, qp); + if (err) + mlx5_core_dbg(dev, "failed adding QP 0x%x to debug file system\n", + qp->qpn); + + qp->pid = current->pid; + atomic_set(&qp->refcount, 1); + atomic_inc(&dev->num_qps); + init_completion(&qp->free); + + return 0; + +err_cmd: + memset(&din, 0, sizeof(din)); + memset(&dout, 0, sizeof(dout)); + din.hdr.opcode = cpu_to_be16(MLX5_CMD_OP_DESTROY_QP); + din.qpn = cpu_to_be32(qp->qpn); + mlx5_cmd_exec(dev, &din, sizeof(din), &out, sizeof(dout)); + + return err; +} +EXPORT_SYMBOL_GPL(mlx5_core_create_qp); + +int mlx5_core_destroy_qp(struct mlx5_core_dev *dev, + struct mlx5_core_qp *qp) +{ + struct mlx5_destroy_qp_mbox_in in; + struct mlx5_destroy_qp_mbox_out out; + struct mlx5_qp_table *table = &dev->priv.qp_table; + unsigned long flags; + int err; + + mlx5_debug_qp_remove(dev, qp); + + spin_lock_irqsave(&table->lock, flags); + radix_tree_delete(&table->tree, qp->qpn); + spin_unlock_irqrestore(&table->lock, flags); + + if (atomic_dec_and_test(&qp->refcount)) + complete(&qp->free); + wait_for_completion(&qp->free); + + memset(&in, 0, sizeof(in)); + memset(&out, 0, sizeof(out)); + in.hdr.opcode = cpu_to_be16(MLX5_CMD_OP_DESTROY_QP); + in.qpn = cpu_to_be32(qp->qpn); + err = mlx5_cmd_exec(dev, &in, sizeof(in), &out, sizeof(out)); + if (err) + return err; + + if (out.hdr.status) + return mlx5_cmd_status_to_err(&out.hdr); + + atomic_dec(&dev->num_qps); + return 0; +} +EXPORT_SYMBOL_GPL(mlx5_core_destroy_qp); + +int mlx5_core_qp_modify(struct mlx5_core_dev *dev, enum mlx5_qp_state cur_state, + enum mlx5_qp_state new_state, + struct mlx5_modify_qp_mbox_in *in, int sqd_event, + struct mlx5_core_qp *qp) +{ + static const u16 optab[MLX5_QP_NUM_STATE][MLX5_QP_NUM_STATE] = { + [MLX5_QP_STATE_RST] = { + [MLX5_QP_STATE_RST] = MLX5_CMD_OP_2RST_QP, + [MLX5_QP_STATE_ERR] = MLX5_CMD_OP_2ERR_QP, + [MLX5_QP_STATE_INIT] = MLX5_CMD_OP_RST2INIT_QP, + }, + [MLX5_QP_STATE_INIT] = { + [MLX5_QP_STATE_RST] = MLX5_CMD_OP_2RST_QP, + [MLX5_QP_STATE_ERR] = MLX5_CMD_OP_2ERR_QP, + [MLX5_QP_STATE_INIT] = MLX5_CMD_OP_INIT2INIT_QP, + [MLX5_QP_STATE_RTR] = MLX5_CMD_OP_INIT2RTR_QP, + }, + [MLX5_QP_STATE_RTR] = { + [MLX5_QP_STATE_RST] = MLX5_CMD_OP_2RST_QP, + [MLX5_QP_STATE_ERR] = MLX5_CMD_OP_2ERR_QP, + [MLX5_QP_STATE_RTS] = MLX5_CMD_OP_RTR2RTS_QP, + }, + [MLX5_QP_STATE_RTS] = { + [MLX5_QP_STATE_RST] = MLX5_CMD_OP_2RST_QP, + [MLX5_QP_STATE_ERR] = MLX5_CMD_OP_2ERR_QP, + [MLX5_QP_STATE_RTS] = MLX5_CMD_OP_RTS2RTS_QP, + [MLX5_QP_STATE_SQD] = MLX5_CMD_OP_RTS2SQD_QP, + }, + [MLX5_QP_STATE_SQD] = { + [MLX5_QP_STATE_RST] = MLX5_CMD_OP_2RST_QP, + [MLX5_QP_STATE_ERR] = MLX5_CMD_OP_2ERR_QP, + [MLX5_QP_STATE_RTS] = MLX5_CMD_OP_SQD2RTS_QP, + [MLX5_QP_STATE_SQD] = MLX5_CMD_OP_SQD2SQD_QP, + }, + [MLX5_QP_STATE_SQER] = { + [MLX5_QP_STATE_RST] = MLX5_CMD_OP_2RST_QP, + [MLX5_QP_STATE_ERR] = MLX5_CMD_OP_2ERR_QP, + [MLX5_QP_STATE_RTS] = MLX5_CMD_OP_SQERR2RTS_QP, + }, + [MLX5_QP_STATE_ERR] = { + [MLX5_QP_STATE_RST] = MLX5_CMD_OP_2RST_QP, + [MLX5_QP_STATE_ERR] = MLX5_CMD_OP_2ERR_QP, + } + }; + + struct mlx5_modify_qp_mbox_out out; + int err = 0; + u16 op; + + if (cur_state >= MLX5_QP_NUM_STATE || new_state >= MLX5_QP_NUM_STATE || + !optab[cur_state][new_state]) + return -EINVAL; + + memset(&out, 0, sizeof(out)); + op = optab[cur_state][new_state]; + in->hdr.opcode = cpu_to_be16(op); + in->qpn = cpu_to_be32(qp->qpn); + err = mlx5_cmd_exec(dev, in, sizeof(*in), &out, sizeof(out)); + if (err) + return err; + + return mlx5_cmd_status_to_err(&out.hdr); +} +EXPORT_SYMBOL_GPL(mlx5_core_qp_modify); + +void mlx5_init_qp_table(struct mlx5_core_dev *dev) +{ + struct mlx5_qp_table *table = &dev->priv.qp_table; + + spin_lock_init(&table->lock); + INIT_RADIX_TREE(&table->tree, GFP_ATOMIC); + mlx5_qp_debugfs_init(dev); +} + +void mlx5_cleanup_qp_table(struct mlx5_core_dev *dev) +{ + mlx5_qp_debugfs_cleanup(dev); +} + +int mlx5_core_qp_query(struct mlx5_core_dev *dev, struct mlx5_core_qp *qp, + struct mlx5_query_qp_mbox_out *out, int outlen) +{ + struct mlx5_query_qp_mbox_in in; + int err; + + memset(&in, 0, sizeof(in)); + memset(out, 0, outlen); + in.hdr.opcode = cpu_to_be16(MLX5_CMD_OP_QUERY_QP); + in.qpn = cpu_to_be32(qp->qpn); + err = mlx5_cmd_exec(dev, &in, sizeof(in), out, outlen); + if (err) + return err; + + if (out->hdr.status) + return mlx5_cmd_status_to_err(&out->hdr); + + return err; +} +EXPORT_SYMBOL_GPL(mlx5_core_qp_query); + +int mlx5_core_xrcd_alloc(struct mlx5_core_dev *dev, u32 *xrcdn) +{ + struct mlx5_alloc_xrcd_mbox_in in; + struct mlx5_alloc_xrcd_mbox_out out; + int err; + + memset(&in, 0, sizeof(in)); + memset(&out, 0, sizeof(out)); + in.hdr.opcode = cpu_to_be16(MLX5_CMD_OP_ALLOC_XRCD); + err = mlx5_cmd_exec(dev, &in, sizeof(in), &out, sizeof(out)); + if (err) + return err; + + if (out.hdr.status) + err = mlx5_cmd_status_to_err(&out.hdr); + else + *xrcdn = be32_to_cpu(out.xrcdn); + + return err; +} +EXPORT_SYMBOL_GPL(mlx5_core_xrcd_alloc); + +int mlx5_core_xrcd_dealloc(struct mlx5_core_dev *dev, u32 xrcdn) +{ + struct mlx5_dealloc_xrcd_mbox_in in; + struct mlx5_dealloc_xrcd_mbox_out out; + int err; + + memset(&in, 0, sizeof(in)); + memset(&out, 0, sizeof(out)); + in.hdr.opcode = cpu_to_be16(MLX5_CMD_OP_DEALLOC_XRCD); + in.xrcdn = cpu_to_be32(xrcdn); + err = mlx5_cmd_exec(dev, &in, sizeof(in), &out, sizeof(out)); + if (err) + return err; + + if (out.hdr.status) + err = mlx5_cmd_status_to_err(&out.hdr); + + return err; +} +EXPORT_SYMBOL_GPL(mlx5_core_xrcd_dealloc); diff --git a/drivers/net/ethernet/mellanox/mlx5/core/srq.c b/drivers/net/ethernet/mellanox/mlx5/core/srq.c new file mode 100644 index 000000000000..38bce93f8314 --- /dev/null +++ b/drivers/net/ethernet/mellanox/mlx5/core/srq.c @@ -0,0 +1,223 @@ +/* + * Copyright (c) 2013, Mellanox Technologies inc. All rights reserved. + * + * This software is available to you under a choice of one of two + * licenses. You may choose to be licensed under the terms of the GNU + * General Public License (GPL) Version 2, available from the file + * COPYING in the main directory of this source tree, or the + * OpenIB.org BSD license below: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * - Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * - Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/mlx5/driver.h> +#include <linux/mlx5/cmd.h> +#include <linux/mlx5/srq.h> +#include <rdma/ib_verbs.h> +#include "mlx5_core.h" + +void mlx5_srq_event(struct mlx5_core_dev *dev, u32 srqn, int event_type) +{ + struct mlx5_srq_table *table = &dev->priv.srq_table; + struct mlx5_core_srq *srq; + + spin_lock(&table->lock); + + srq = radix_tree_lookup(&table->tree, srqn); + if (srq) + atomic_inc(&srq->refcount); + + spin_unlock(&table->lock); + + if (!srq) { + mlx5_core_warn(dev, "Async event for bogus SRQ 0x%08x\n", srqn); + return; + } + + srq->event(srq, event_type); + + if (atomic_dec_and_test(&srq->refcount)) + complete(&srq->free); +} + +struct mlx5_core_srq *mlx5_core_get_srq(struct mlx5_core_dev *dev, u32 srqn) +{ + struct mlx5_srq_table *table = &dev->priv.srq_table; + struct mlx5_core_srq *srq; + + spin_lock(&table->lock); + + srq = radix_tree_lookup(&table->tree, srqn); + if (srq) + atomic_inc(&srq->refcount); + + spin_unlock(&table->lock); + + return srq; +} +EXPORT_SYMBOL(mlx5_core_get_srq); + +int mlx5_core_create_srq(struct mlx5_core_dev *dev, struct mlx5_core_srq *srq, + struct mlx5_create_srq_mbox_in *in, int inlen) +{ + struct mlx5_create_srq_mbox_out out; + struct mlx5_srq_table *table = &dev->priv.srq_table; + struct mlx5_destroy_srq_mbox_in din; + struct mlx5_destroy_srq_mbox_out dout; + int err; + + memset(&out, 0, sizeof(out)); + in->hdr.opcode = cpu_to_be16(MLX5_CMD_OP_CREATE_SRQ); + err = mlx5_cmd_exec(dev, in, inlen, &out, sizeof(out)); + if (err) + return err; + + if (out.hdr.status) + return mlx5_cmd_status_to_err(&out.hdr); + + srq->srqn = be32_to_cpu(out.srqn) & 0xffffff; + + atomic_set(&srq->refcount, 1); + init_completion(&srq->free); + + spin_lock_irq(&table->lock); + err = radix_tree_insert(&table->tree, srq->srqn, srq); + spin_unlock_irq(&table->lock); + if (err) { + mlx5_core_warn(dev, "err %d, srqn 0x%x\n", err, srq->srqn); + goto err_cmd; + } + + return 0; + +err_cmd: + memset(&din, 0, sizeof(din)); + memset(&dout, 0, sizeof(dout)); + din.srqn = cpu_to_be32(srq->srqn); + din.hdr.opcode = cpu_to_be16(MLX5_CMD_OP_DESTROY_SRQ); + mlx5_cmd_exec(dev, &din, sizeof(din), &dout, sizeof(dout)); + return err; +} +EXPORT_SYMBOL(mlx5_core_create_srq); + +int mlx5_core_destroy_srq(struct mlx5_core_dev *dev, struct mlx5_core_srq *srq) +{ + struct mlx5_destroy_srq_mbox_in in; + struct mlx5_destroy_srq_mbox_out out; + struct mlx5_srq_table *table = &dev->priv.srq_table; + struct mlx5_core_srq *tmp; + int err; + + spin_lock_irq(&table->lock); + tmp = radix_tree_delete(&table->tree, srq->srqn); + spin_unlock_irq(&table->lock); + if (!tmp) { + mlx5_core_warn(dev, "srq 0x%x not found in tree\n", srq->srqn); + return -EINVAL; + } + if (tmp != srq) { + mlx5_core_warn(dev, "corruption on srqn 0x%x\n", srq->srqn); + return -EINVAL; + } + + memset(&in, 0, sizeof(in)); + memset(&out, 0, sizeof(out)); + in.hdr.opcode = cpu_to_be16(MLX5_CMD_OP_DESTROY_SRQ); + in.srqn = cpu_to_be32(srq->srqn); + err = mlx5_cmd_exec(dev, &in, sizeof(in), &out, sizeof(out)); + if (err) + return err; + + if (out.hdr.status) + return mlx5_cmd_status_to_err(&out.hdr); + + if (atomic_dec_and_test(&srq->refcount)) + complete(&srq->free); + wait_for_completion(&srq->free); + + return 0; +} +EXPORT_SYMBOL(mlx5_core_destroy_srq); + +int mlx5_core_query_srq(struct mlx5_core_dev *dev, struct mlx5_core_srq *srq, + struct mlx5_query_srq_mbox_out *out) +{ + struct mlx5_query_srq_mbox_in in; + int err; + + memset(&in, 0, sizeof(in)); + memset(out, 0, sizeof(*out)); + + in.hdr.opcode = cpu_to_be16(MLX5_CMD_OP_QUERY_SRQ); + in.srqn = cpu_to_be32(srq->srqn); + err = mlx5_cmd_exec(dev, &in, sizeof(in), out, sizeof(*out)); + if (err) + return err; + + if (out->hdr.status) + return mlx5_cmd_status_to_err(&out->hdr); + + return err; +} +EXPORT_SYMBOL(mlx5_core_query_srq); + +int mlx5_core_arm_srq(struct mlx5_core_dev *dev, struct mlx5_core_srq *srq, + u16 lwm, int is_srq) +{ + struct mlx5_arm_srq_mbox_in in; + struct mlx5_arm_srq_mbox_out out; + int err; + + memset(&in, 0, sizeof(in)); + memset(&out, 0, sizeof(out)); + + in.hdr.opcode = cpu_to_be16(MLX5_CMD_OP_ARM_RQ); + in.hdr.opmod = cpu_to_be16(!!is_srq); + in.srqn = cpu_to_be32(srq->srqn); + in.lwm = cpu_to_be16(lwm); + + err = mlx5_cmd_exec(dev, &in, sizeof(in), &out, sizeof(out)); + if (err) + return err; + + if (out.hdr.status) + return mlx5_cmd_status_to_err(&out.hdr); + + return err; +} +EXPORT_SYMBOL(mlx5_core_arm_srq); + +void mlx5_init_srq_table(struct mlx5_core_dev *dev) +{ + struct mlx5_srq_table *table = &dev->priv.srq_table; + + spin_lock_init(&table->lock); + INIT_RADIX_TREE(&table->tree, GFP_ATOMIC); +} + +void mlx5_cleanup_srq_table(struct mlx5_core_dev *dev) +{ + /* nothing */ +} diff --git a/drivers/net/ethernet/mellanox/mlx5/core/uar.c b/drivers/net/ethernet/mellanox/mlx5/core/uar.c new file mode 100644 index 000000000000..71d4a3937200 --- /dev/null +++ b/drivers/net/ethernet/mellanox/mlx5/core/uar.c @@ -0,0 +1,223 @@ +/* + * Copyright (c) 2013, Mellanox Technologies inc. All rights reserved. + * + * This software is available to you under a choice of one of two + * licenses. You may choose to be licensed under the terms of the GNU + * General Public License (GPL) Version 2, available from the file + * COPYING in the main directory of this source tree, or the + * OpenIB.org BSD license below: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * - Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * - Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/mlx5/driver.h> +#include <linux/mlx5/cmd.h> +#include "mlx5_core.h" + +enum { + NUM_DRIVER_UARS = 4, + NUM_LOW_LAT_UUARS = 4, +}; + + +struct mlx5_alloc_uar_mbox_in { + struct mlx5_inbox_hdr hdr; + u8 rsvd[8]; +}; + +struct mlx5_alloc_uar_mbox_out { + struct mlx5_outbox_hdr hdr; + __be32 uarn; + u8 rsvd[4]; +}; + +struct mlx5_free_uar_mbox_in { + struct mlx5_inbox_hdr hdr; + __be32 uarn; + u8 rsvd[4]; +}; + +struct mlx5_free_uar_mbox_out { + struct mlx5_outbox_hdr hdr; + u8 rsvd[8]; +}; + +int mlx5_cmd_alloc_uar(struct mlx5_core_dev *dev, u32 *uarn) +{ + struct mlx5_alloc_uar_mbox_in in; + struct mlx5_alloc_uar_mbox_out out; + int err; + + memset(&in, 0, sizeof(in)); + memset(&out, 0, sizeof(out)); + in.hdr.opcode = cpu_to_be16(MLX5_CMD_OP_ALLOC_UAR); + err = mlx5_cmd_exec(dev, &in, sizeof(in), &out, sizeof(out)); + if (err) + goto ex; + + if (out.hdr.status) { + err = mlx5_cmd_status_to_err(&out.hdr); + goto ex; + } + + *uarn = be32_to_cpu(out.uarn) & 0xffffff; + +ex: + return err; +} +EXPORT_SYMBOL(mlx5_cmd_alloc_uar); + +int mlx5_cmd_free_uar(struct mlx5_core_dev *dev, u32 uarn) +{ + struct mlx5_free_uar_mbox_in in; + struct mlx5_free_uar_mbox_out out; + int err; + + memset(&in, 0, sizeof(in)); + in.hdr.opcode = cpu_to_be16(MLX5_CMD_OP_DEALLOC_UAR); + in.uarn = cpu_to_be32(uarn); + err = mlx5_cmd_exec(dev, &in, sizeof(in), &out, sizeof(out)); + if (err) + goto ex; + + if (out.hdr.status) + err = mlx5_cmd_status_to_err(&out.hdr); + +ex: + return err; +} +EXPORT_SYMBOL(mlx5_cmd_free_uar); + +static int need_uuar_lock(int uuarn) +{ + int tot_uuars = NUM_DRIVER_UARS * MLX5_BF_REGS_PER_PAGE; + + if (uuarn == 0 || tot_uuars - NUM_LOW_LAT_UUARS) + return 0; + + return 1; +} + +int mlx5_alloc_uuars(struct mlx5_core_dev *dev, struct mlx5_uuar_info *uuari) +{ + int tot_uuars = NUM_DRIVER_UARS * MLX5_BF_REGS_PER_PAGE; + struct mlx5_bf *bf; + phys_addr_t addr; + int err; + int i; + + uuari->num_uars = NUM_DRIVER_UARS; + uuari->num_low_latency_uuars = NUM_LOW_LAT_UUARS; + + mutex_init(&uuari->lock); + uuari->uars = kcalloc(uuari->num_uars, sizeof(*uuari->uars), GFP_KERNEL); + if (!uuari->uars) + return -ENOMEM; + + uuari->bfs = kcalloc(tot_uuars, sizeof(*uuari->bfs), GFP_KERNEL); + if (!uuari->bfs) { + err = -ENOMEM; + goto out_uars; + } + + uuari->bitmap = kcalloc(BITS_TO_LONGS(tot_uuars), sizeof(*uuari->bitmap), + GFP_KERNEL); + if (!uuari->bitmap) { + err = -ENOMEM; + goto out_bfs; + } + + uuari->count = kcalloc(tot_uuars, sizeof(*uuari->count), GFP_KERNEL); + if (!uuari->count) { + err = -ENOMEM; + goto out_bitmap; + } + + for (i = 0; i < uuari->num_uars; i++) { + err = mlx5_cmd_alloc_uar(dev, &uuari->uars[i].index); + if (err) + goto out_count; + + addr = dev->iseg_base + ((phys_addr_t)(uuari->uars[i].index) << PAGE_SHIFT); + uuari->uars[i].map = ioremap(addr, PAGE_SIZE); + if (!uuari->uars[i].map) { + mlx5_cmd_free_uar(dev, uuari->uars[i].index); + goto out_count; + } + mlx5_core_dbg(dev, "allocated uar index 0x%x, mmaped at %p\n", + uuari->uars[i].index, uuari->uars[i].map); + } + + for (i = 0; i < tot_uuars; i++) { + bf = &uuari->bfs[i]; + + bf->buf_size = dev->caps.bf_reg_size / 2; + bf->uar = &uuari->uars[i / MLX5_BF_REGS_PER_PAGE]; + bf->regreg = uuari->uars[i / MLX5_BF_REGS_PER_PAGE].map; + bf->reg = NULL; /* Add WC support */ + bf->offset = (i % MLX5_BF_REGS_PER_PAGE) * dev->caps.bf_reg_size + + MLX5_BF_OFFSET; + bf->need_lock = need_uuar_lock(i); + spin_lock_init(&bf->lock); + spin_lock_init(&bf->lock32); + bf->uuarn = i; + } + + return 0; + +out_count: + for (i--; i >= 0; i--) { + iounmap(uuari->uars[i].map); + mlx5_cmd_free_uar(dev, uuari->uars[i].index); + } + kfree(uuari->count); + +out_bitmap: + kfree(uuari->bitmap); + +out_bfs: + kfree(uuari->bfs); + +out_uars: + kfree(uuari->uars); + return err; +} + +int mlx5_free_uuars(struct mlx5_core_dev *dev, struct mlx5_uuar_info *uuari) +{ + int i = uuari->num_uars; + + for (i--; i >= 0; i--) { + iounmap(uuari->uars[i].map); + mlx5_cmd_free_uar(dev, uuari->uars[i].index); + } + + kfree(uuari->count); + kfree(uuari->bitmap); + kfree(uuari->bfs); + kfree(uuari->uars); + + return 0; +} |