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#ifndef DEF_RDMA_VT_H
#define DEF_RDMA_VT_H
/*
* Copyright(c) 2015 Intel Corporation.
*
* This file is provided under a dual BSD/GPLv2 license. When using or
* redistributing this file, you may do so under either license.
*
* GPL LICENSE SUMMARY
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* BSD LICENSE
*
* 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.
* - Neither the name of Intel Corporation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
/*
* Structure that low level drivers will populate in order to register with the
* rdmavt layer.
*/
#include <linux/spinlock.h>
#include <linux/list.h>
#include <rdma/ib_verbs.h>
#include <rdma/rdmavt_mr.h>
#include <rdma/rdmavt_qp.h>
/*
* For some of the IBTA objects there will likely be some
* initializations required. We need flags to determine whether it is OK
* for rdmavt to do this or not. This does not imply any functions of a
* partiuclar IBTA object are overridden.
*/
#define RVT_FLAG_MR_INIT_DRIVER BIT(1)
#define RVT_FLAG_QP_INIT_DRIVER BIT(2)
#define RVT_FLAG_CQ_INIT_DRIVER BIT(3)
struct rvt_ibport {
struct rvt_qp __rcu *qp[2];
struct ib_mad_agent *send_agent; /* agent for SMI (traps) */
struct rb_root mcast_tree;
spinlock_t lock; /* protect changes in this struct */
/* non-zero when timer is set */
unsigned long mkey_lease_timeout;
unsigned long trap_timeout;
__be64 gid_prefix; /* in network order */
__be64 mkey;
u64 tid;
u32 port_cap_flags;
u32 pma_sample_start;
u32 pma_sample_interval;
__be16 pma_counter_select[5];
u16 pma_tag;
u16 mkey_lease_period;
u16 sm_lid;
u8 sm_sl;
u8 mkeyprot;
u8 subnet_timeout;
u8 vl_high_limit;
/*
* Driver is expected to keep these up to date. These
* counters are informational only and not required to be
* completely accurate.
*/
u64 n_rc_resends;
u64 n_seq_naks;
u64 n_rdma_seq;
u64 n_rnr_naks;
u64 n_other_naks;
u64 n_loop_pkts;
u64 n_pkt_drops;
u64 n_vl15_dropped;
u64 n_rc_timeouts;
u64 n_dmawait;
u64 n_unaligned;
u64 n_rc_dupreq;
u64 n_rc_seqnak;
u16 pkey_violations;
u16 qkey_violations;
u16 mkey_violations;
/* Hot-path per CPU counters to avoid cacheline trading to update */
u64 z_rc_acks;
u64 z_rc_qacks;
u64 z_rc_delayed_comp;
u64 __percpu *rc_acks;
u64 __percpu *rc_qacks;
u64 __percpu *rc_delayed_comp;
void *priv; /* driver private data */
/* TODO: Move sm_ah and smi_ah into here as well*/
};
/*
* Things that are driver specific, module parameters in hfi1 and qib
*/
struct rvt_driver_params {
/*
* driver required fields:
* node_guid
* phys_port_cnt
* dma_device
* owner
* driver optional fields (rvt will provide generic value if blank):
* name
* node_desc
* rvt fields, driver value ignored:
* uverbs_abi_ver
* node_type
* num_comp_vectors
* uverbs_cmd_mask
*/
struct ib_device_attr props;
/*
* Drivers will need to support a number of notifications to rvt in
* accordance with certain events. This structure should contain a mask
* of the supported events. Such events that the rvt may need to know
* about include:
* port errors
* port active
* lid change
* sm change
* client reregister
* pkey change
*
* There may also be other events that the rvt layers needs to know
* about this is not an exhaustive list. Some events though rvt does not
* need to rely on the driver for such as completion queue error.
*/
int rvt_signal_supported;
/*
* Anything driver specific that is not covered by props
* For instance special module parameters. Goes here.
*/
unsigned int lkey_table_size;
int nports;
};
/* Protection domain */
struct rvt_pd {
struct ib_pd ibpd;
int user; /* non-zero if created from user space */
};
/* Address handle */
struct rvt_ah {
struct ib_ah ibah;
struct ib_ah_attr attr;
atomic_t refcount;
u8 vl;
u8 log_pmtu;
};
struct rvt_dev_info;
struct rvt_driver_provided {
/*
* The work to create port files in /sys/class Infiniband is different
* depending on the driver. This should not be extracted away and
* instead drivers are responsible for setting the correct callback for
* this.
*/
/* -------------------*/
/* Required functions */
/* -------------------*/
int (*port_callback)(struct ib_device *, u8, struct kobject *);
const char * (*get_card_name)(struct rvt_dev_info *rdi);
struct pci_dev * (*get_pci_dev)(struct rvt_dev_info *rdi);
/*--------------------*/
/* Optional functions */
/*--------------------*/
int (*check_ah)(struct ib_device *, struct ib_ah_attr *);
void (*notify_new_ah)(struct ib_device *, struct ib_ah_attr *,
struct rvt_ah *);
};
struct rvt_dev_info {
struct ib_device ibdev; /* Keep this first. Nothing above here */
/*
* Prior to calling for registration the driver will be responsible for
* allocating space for this structure.
*
* The driver will also be responsible for filling in certain members of
* dparms.props
*/
/* Driver specific properties */
struct rvt_driver_params dparms;
struct rvt_mregion __rcu *dma_mr;
struct rvt_lkey_table lkey_table;
/* PKey Table goes here */
/* Driver specific helper functions */
struct rvt_driver_provided driver_f;
/* Internal use */
int n_pds_allocated;
spinlock_t n_pds_lock; /* Protect pd allocated count */
int n_ahs_allocated;
spinlock_t n_ahs_lock; /* Protect ah allocated count */
int flags;
struct rvt_ibport **ports;
};
static inline struct rvt_pd *ibpd_to_rvtpd(struct ib_pd *ibpd)
{
return container_of(ibpd, struct rvt_pd, ibpd);
}
static inline struct rvt_ah *ibah_to_rvtah(struct ib_ah *ibah)
{
return container_of(ibah, struct rvt_ah, ibah);
}
static inline struct rvt_dev_info *ib_to_rvt(struct ib_device *ibdev)
{
return container_of(ibdev, struct rvt_dev_info, ibdev);
}
static inline struct rvt_srq *ibsrq_to_rvtsrq(struct ib_srq *ibsrq)
{
return container_of(ibsrq, struct rvt_srq, ibsrq);
}
int rvt_register_device(struct rvt_dev_info *rvd);
void rvt_unregister_device(struct rvt_dev_info *rvd);
int rvt_check_ah(struct ib_device *ibdev, struct ib_ah_attr *ah_attr);
void rvt_attach_port(struct rvt_dev_info *rdi, struct rvt_ibport *port,
int portnum);
int rvt_rkey_ok(struct rvt_qp *qp, struct rvt_sge *sge,
u32 len, u64 vaddr, u32 rkey, int acc);
int rvt_lkey_ok(struct rvt_lkey_table *rkt, struct rvt_pd *pd,
struct rvt_sge *isge, struct ib_sge *sge, int acc);
#endif /* DEF_RDMA_VT_H */
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