diff options
| author | Selvin Xavier <selvin.xavier@broadcom.com> | 2023-06-13 20:12:23 +0200 |
|---|---|---|
| committer | Jason Gunthorpe <jgg@nvidia.com> | 2023-06-21 19:13:17 +0200 |
| commit | 360da60d6c6edb9740de7a8e6d8969d62ceff956 (patch) | |
| tree | 8b82ef68c1bb317a7d88848ffcd761029a6d7ba7 /drivers/infiniband/hw/bnxt_re/main.c | |
| parent | RDMA/bnxt_re: Reorg the bar mapping (diff) | |
| download | linux-360da60d6c6edb9740de7a8e6d8969d62ceff956.tar.xz linux-360da60d6c6edb9740de7a8e6d8969d62ceff956.zip | |
RDMA/bnxt_re: Enable low latency push
Introduce driver specific uapi functionalites. Added a alloc_page
functionality for user library to allocate specific pages. Currently added
support for allocating write combine pages for push functinality. This
interface shall be extended for other page allocations.
Allocate a WC page using the uapi hook for enabling the low latency push
in Gen P5 adapters for small packets. This is supported only for the user
space QPs.
Link: https://lore.kernel.org/r/1686679943-17117-8-git-send-email-selvin.xavier@broadcom.com
Signed-off-by: Selvin Xavier <selvin.xavier@broadcom.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Diffstat (limited to 'drivers/infiniband/hw/bnxt_re/main.c')
| -rw-r--r-- | drivers/infiniband/hw/bnxt_re/main.c | 20 |
1 files changed, 17 insertions, 3 deletions
diff --git a/drivers/infiniband/hw/bnxt_re/main.c b/drivers/infiniband/hw/bnxt_re/main.c index 0c681134dd57..0816cf2a0b38 100644 --- a/drivers/infiniband/hw/bnxt_re/main.c +++ b/drivers/infiniband/hw/bnxt_re/main.c @@ -66,6 +66,7 @@ #include <rdma/bnxt_re-abi.h> #include "bnxt.h" #include "hw_counters.h" +#include "ib_verbs.h" static char version[] = BNXT_RE_DESC "\n"; @@ -117,6 +118,10 @@ static void bnxt_re_set_db_offset(struct bnxt_re_dev *rdev) * in such cases and DB-push will be disabled. */ barlen = pci_resource_len(res->pdev, RCFW_DBR_PCI_BAR_REGION); + if (cctx->modes.db_push && l2db_len && en_dev->l2_db_size != barlen) { + res->dpi_tbl.wcreg.offset = en_dev->l2_db_size; + dev_info(rdev_to_dev(rdev), "Low latency framework is enabled\n"); + } } static void bnxt_re_set_drv_mode(struct bnxt_re_dev *rdev, u8 mode) @@ -395,8 +400,7 @@ static int bnxt_re_hwrm_qcfg(struct bnxt_re_dev *rdev, u32 *db_len, int rc; memset(&fw_msg, 0, sizeof(fw_msg)); - bnxt_re_init_hwrm_hdr(rdev, (void *)&req, - HWRM_FUNC_QCFG, -1, -1); + bnxt_re_init_hwrm_hdr((void *)&req, HWRM_FUNC_QCFG); req.fid = cpu_to_le16(0xffff); bnxt_re_fill_fw_msg(&fw_msg, (void *)&req, sizeof(req), (void *)&resp, sizeof(resp), DFLT_HWRM_CMD_TIMEOUT); @@ -416,13 +420,20 @@ int bnxt_re_hwrm_qcaps(struct bnxt_re_dev *rdev) struct hwrm_func_qcaps_input req = {}; struct bnxt_qplib_chip_ctx *cctx; struct bnxt_fw_msg fw_msg = {}; + int rc; cctx = rdev->chip_ctx; bnxt_re_init_hwrm_hdr((void *)&req, HWRM_FUNC_QCAPS); req.fid = cpu_to_le16(0xffff); bnxt_re_fill_fw_msg(&fw_msg, (void *)&req, sizeof(req), (void *)&resp, sizeof(resp), DFLT_HWRM_CMD_TIMEOUT); - return bnxt_send_msg(en_dev, &fw_msg); + + rc = bnxt_send_msg(en_dev, &fw_msg); + if (rc) + return rc; + cctx->modes.db_push = le32_to_cpu(resp.flags) & FUNC_QCAPS_RESP_FLAGS_WCB_PUSH_MODE; + + return 0; } static int bnxt_re_net_ring_free(struct bnxt_re_dev *rdev, @@ -669,6 +680,9 @@ static int bnxt_re_register_ib(struct bnxt_re_dev *rdev) ibdev->dev.parent = &rdev->en_dev->pdev->dev; ibdev->local_dma_lkey = BNXT_QPLIB_RSVD_LKEY; + if (IS_ENABLED(CONFIG_INFINIBAND_USER_ACCESS)) + ibdev->driver_def = bnxt_re_uapi_defs; + ib_set_device_ops(ibdev, &bnxt_re_dev_ops); ret = ib_device_set_netdev(&rdev->ibdev, rdev->netdev, 1); if (ret) |