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RDMA/vmw_pvrdma: Add shared receive queue support

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Add the required functions needed to support SRQs. Currently, kernel
clients are not supported. SRQs will only be available in userspace.

Reviewed-by: Adit Ranadive <aditr@vmware.com>
Reviewed-by: Aditya Sarwade <asarwade@vmware.com>
Reviewed-by: Jorgen Hansen <jhansen@vmware.com>
Reviewed-by: Nitish Bhat <bnitish@vmware.com>
Signed-off-by: Bryan Tan <bryantan@vmware.com>
Reviewed-by: Yuval Shaia <yuval.shaia@oracle.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Bryan Tan 2017-11-06 11:48:53 -08:00 committed by Doug Ledford
parent cb9fd89f91
commit 8b10ba783c
9 changed files with 523 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/infiniband/hw/vmw_pvrdma/Makefile
View File

@ -1,3 +1,3 @@
obj-$(CONFIG_INFINIBAND_VMWARE_PVRDMA) += vmw_pvrdma.o
vmw_pvrdma-y := pvrdma_cmd.o pvrdma_cq.o pvrdma_doorbell.o pvrdma_main.o pvrdma_misc.o pvrdma_mr.o pvrdma_qp.o pvrdma_verbs.o
vmw_pvrdma-y := pvrdma_cmd.o pvrdma_cq.o pvrdma_doorbell.o pvrdma_main.o pvrdma_misc.o pvrdma_mr.o pvrdma_qp.o pvrdma_srq.o pvrdma_verbs.o

25
drivers/infiniband/hw/vmw_pvrdma/pvrdma.h
View File

@ -162,6 +162,22 @@ struct pvrdma_ah {
struct pvrdma_av av;
};
struct pvrdma_srq {
struct ib_srq ibsrq;
int offset;
spinlock_t lock; /* SRQ lock. */
int wqe_cnt;
int wqe_size;
int max_gs;
struct ib_umem *umem;
struct pvrdma_ring_state *ring;
struct pvrdma_page_dir pdir;
u32 srq_handle;
int npages;
refcount_t refcnt;
wait_queue_head_t wait;
};
struct pvrdma_qp {
struct ib_qp ibqp;
u32 qp_handle;
@ -171,6 +187,7 @@ struct pvrdma_qp {
struct ib_umem *rumem;
struct ib_umem *sumem;
struct pvrdma_page_dir pdir;
struct pvrdma_srq *srq;
int npages;
int npages_send;
int npages_recv;
@ -210,6 +227,8 @@ struct pvrdma_dev {
struct pvrdma_page_dir cq_pdir;
struct pvrdma_cq **cq_tbl;
spinlock_t cq_tbl_lock;
struct pvrdma_srq **srq_tbl;
spinlock_t srq_tbl_lock;
struct pvrdma_qp **qp_tbl;
spinlock_t qp_tbl_lock;
struct pvrdma_uar_table uar_table;
@ -221,6 +240,7 @@ struct pvrdma_dev {
bool ib_active;
atomic_t num_qps;
atomic_t num_cqs;
atomic_t num_srqs;
atomic_t num_pds;
atomic_t num_ahs;
@ -256,6 +276,11 @@ static inline struct pvrdma_cq *to_vcq(struct ib_cq *ibcq)
return container_of(ibcq, struct pvrdma_cq, ibcq);
}
static inline struct pvrdma_srq *to_vsrq(struct ib_srq *ibsrq)
{
return container_of(ibsrq, struct pvrdma_srq, ibsrq);
}
static inline struct pvrdma_user_mr *to_vmr(struct ib_mr *ibmr)
{
return container_of(ibmr, struct pvrdma_user_mr, ibmr);

54
drivers/infiniband/hw/vmw_pvrdma/pvrdma_dev_api.h
View File

@ -339,6 +339,10 @@ enum {
PVRDMA_CMD_DESTROY_UC,
PVRDMA_CMD_CREATE_BIND,
PVRDMA_CMD_DESTROY_BIND,
PVRDMA_CMD_CREATE_SRQ,
PVRDMA_CMD_MODIFY_SRQ,
PVRDMA_CMD_QUERY_SRQ,
PVRDMA_CMD_DESTROY_SRQ,
PVRDMA_CMD_MAX,
};
@ -361,6 +365,10 @@ enum {
PVRDMA_CMD_DESTROY_UC_RESP_NOOP,
PVRDMA_CMD_CREATE_BIND_RESP_NOOP,
PVRDMA_CMD_DESTROY_BIND_RESP_NOOP,
PVRDMA_CMD_CREATE_SRQ_RESP,
PVRDMA_CMD_MODIFY_SRQ_RESP,
PVRDMA_CMD_QUERY_SRQ_RESP,
PVRDMA_CMD_DESTROY_SRQ_RESP,
PVRDMA_CMD_MAX_RESP,
};
@ -495,6 +503,46 @@ struct pvrdma_cmd_destroy_cq {
u8 reserved[4];
};
struct pvrdma_cmd_create_srq {
struct pvrdma_cmd_hdr hdr;
u64 pdir_dma;
u32 pd_handle;
u32 nchunks;
struct pvrdma_srq_attr attrs;
u8 srq_type;
u8 reserved[7];
};
struct pvrdma_cmd_create_srq_resp {
struct pvrdma_cmd_resp_hdr hdr;
u32 srqn;
u8 reserved[4];
};
struct pvrdma_cmd_modify_srq {
struct pvrdma_cmd_hdr hdr;
u32 srq_handle;
u32 attr_mask;
struct pvrdma_srq_attr attrs;
};
struct pvrdma_cmd_query_srq {
struct pvrdma_cmd_hdr hdr;
u32 srq_handle;
u8 reserved[4];
};
struct pvrdma_cmd_query_srq_resp {
struct pvrdma_cmd_resp_hdr hdr;
struct pvrdma_srq_attr attrs;
};
struct pvrdma_cmd_destroy_srq {
struct pvrdma_cmd_hdr hdr;
u32 srq_handle;
u8 reserved[4];
};
struct pvrdma_cmd_create_qp {
struct pvrdma_cmd_hdr hdr;
u64 pdir_dma;
@ -594,6 +642,10 @@ union pvrdma_cmd_req {
struct pvrdma_cmd_destroy_qp destroy_qp;
struct pvrdma_cmd_create_bind create_bind;
struct pvrdma_cmd_destroy_bind destroy_bind;
struct pvrdma_cmd_create_srq create_srq;
struct pvrdma_cmd_modify_srq modify_srq;
struct pvrdma_cmd_query_srq query_srq;
struct pvrdma_cmd_destroy_srq destroy_srq;
};
union pvrdma_cmd_resp {
@ -608,6 +660,8 @@ union pvrdma_cmd_resp {
struct pvrdma_cmd_create_qp_resp create_qp_resp;
struct pvrdma_cmd_query_qp_resp query_qp_resp;
struct pvrdma_cmd_destroy_qp_resp destroy_qp_resp;
struct pvrdma_cmd_create_srq_resp create_srq_resp;
struct pvrdma_cmd_query_srq_resp query_srq_resp;
};
#endif /* __PVRDMA_DEV_API_H__ */

59
drivers/infiniband/hw/vmw_pvrdma/pvrdma_main.c
View File

@ -118,6 +118,7 @@ static int pvrdma_init_device(struct pvrdma_dev *dev)
spin_lock_init(&dev->cmd_lock);
sema_init(&dev->cmd_sema, 1);
atomic_set(&dev->num_qps, 0);
atomic_set(&dev->num_srqs, 0);
atomic_set(&dev->num_cqs, 0);
atomic_set(&dev->num_pds, 0);
atomic_set(&dev->num_ahs, 0);
@ -254,9 +255,32 @@ static int pvrdma_register_device(struct pvrdma_dev *dev)
goto err_cq_free;
spin_lock_init(&dev->qp_tbl_lock);
/* Check if SRQ is supported by backend */
if (dev->dsr->caps.max_srq) {
dev->ib_dev.uverbs_cmd_mask |=
(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_POST_SRQ_RECV);
dev->ib_dev.create_srq = pvrdma_create_srq;
dev->ib_dev.modify_srq = pvrdma_modify_srq;
dev->ib_dev.query_srq = pvrdma_query_srq;
dev->ib_dev.destroy_srq = pvrdma_destroy_srq;
dev->ib_dev.post_srq_recv = pvrdma_post_srq_recv;
dev->srq_tbl = kcalloc(dev->dsr->caps.max_srq,
sizeof(struct pvrdma_srq *),
GFP_KERNEL);
if (!dev->srq_tbl)
goto err_qp_free;
}
spin_lock_init(&dev->srq_tbl_lock);
ret = ib_register_device(&dev->ib_dev, NULL);
if (ret)
goto err_qp_free;
goto err_srq_free;
for (i = 0; i < ARRAY_SIZE(pvrdma_class_attributes); ++i) {
ret = device_create_file(&dev->ib_dev.dev,
@ -271,6 +295,8 @@ static int pvrdma_register_device(struct pvrdma_dev *dev)
err_class:
ib_unregister_device(&dev->ib_dev);
err_srq_free:
kfree(dev->srq_tbl);
err_qp_free:
kfree(dev->qp_tbl);
err_cq_free:
@ -353,6 +379,35 @@ static void pvrdma_cq_event(struct pvrdma_dev *dev, u32 cqn, int type)
}
}
static void pvrdma_srq_event(struct pvrdma_dev *dev, u32 srqn, int type)
{
struct pvrdma_srq *srq;
unsigned long flags;
spin_lock_irqsave(&dev->srq_tbl_lock, flags);
if (dev->srq_tbl)
srq = dev->srq_tbl[srqn % dev->dsr->caps.max_srq];
else
srq = NULL;
if (srq)
refcount_inc(&srq->refcnt);
spin_unlock_irqrestore(&dev->srq_tbl_lock, flags);
if (srq && srq->ibsrq.event_handler) {
struct ib_srq *ibsrq = &srq->ibsrq;
struct ib_event e;
e.device = ibsrq->device;
e.element.srq = ibsrq;
e.event = type; /* 1:1 mapping for now. */
ibsrq->event_handler(&e, ibsrq->srq_context);
}
if (srq) {
if (refcount_dec_and_test(&srq->refcnt))
wake_up(&srq->wait);
}
}
static void pvrdma_dispatch_event(struct pvrdma_dev *dev, int port,
enum ib_event_type event)
{
@ -423,6 +478,7 @@ static irqreturn_t pvrdma_intr1_handler(int irq, void *dev_id)
case PVRDMA_EVENT_SRQ_ERR:
case PVRDMA_EVENT_SRQ_LIMIT_REACHED:
pvrdma_srq_event(dev, eqe->info, eqe->type);
break;
case PVRDMA_EVENT_PORT_ACTIVE:
@ -1059,6 +1115,7 @@ static void pvrdma_pci_remove(struct pci_dev *pdev)
iounmap(dev->regs);
kfree(dev->sgid_tbl);
kfree(dev->cq_tbl);
kfree(dev->srq_tbl);
kfree(dev->qp_tbl);
pvrdma_uar_table_cleanup(dev);
iounmap(dev->driver_uar.map);

55
drivers/infiniband/hw/vmw_pvrdma/pvrdma_qp.c
View File

@ -198,6 +198,7 @@ struct ib_qp *pvrdma_create_qp(struct ib_pd *pd,
struct pvrdma_create_qp ucmd;
unsigned long flags;
int ret;
bool is_srq = !!init_attr->srq;
if (init_attr->create_flags) {
dev_warn(&dev->pdev->dev,
@ -214,6 +215,12 @@ struct ib_qp *pvrdma_create_qp(struct ib_pd *pd,
return ERR_PTR(-EINVAL);
}
if (is_srq && !dev->dsr->caps.max_srq) {
dev_warn(&dev->pdev->dev,
"SRQs not supported by device\n");
return ERR_PTR(-EINVAL);
}
if (!atomic_add_unless(&dev->num_qps, 1, dev->dsr->caps.max_qp))
return ERR_PTR(-ENOMEM);
@ -252,26 +259,36 @@ struct ib_qp *pvrdma_create_qp(struct ib_pd *pd,
goto err_qp;
}
/* set qp->sq.wqe_cnt, shift, buf_size.. */
qp->rumem = ib_umem_get(pd->uobject->context,
ucmd.rbuf_addr,
ucmd.rbuf_size, 0, 0);
if (IS_ERR(qp->rumem)) {
ret = PTR_ERR(qp->rumem);
goto err_qp;
if (!is_srq) {
/* set qp->sq.wqe_cnt, shift, buf_size.. */
qp->rumem = ib_umem_get(pd->uobject->context,
ucmd.rbuf_addr,
ucmd.rbuf_size, 0, 0);
if (IS_ERR(qp->rumem)) {
ret = PTR_ERR(qp->rumem);
goto err_qp;
}
qp->srq = NULL;
} else {
qp->rumem = NULL;
qp->srq = to_vsrq(init_attr->srq);
}
qp->sumem = ib_umem_get(pd->uobject->context,
ucmd.sbuf_addr,
ucmd.sbuf_size, 0, 0);
if (IS_ERR(qp->sumem)) {
ib_umem_release(qp->rumem);
if (!is_srq)
ib_umem_release(qp->rumem);
ret = PTR_ERR(qp->sumem);
goto err_qp;
}
qp->npages_send = ib_umem_page_count(qp->sumem);
qp->npages_recv = ib_umem_page_count(qp->rumem);
if (!is_srq)
qp->npages_recv = ib_umem_page_count(qp->rumem);
else
qp->npages_recv = 0;
qp->npages = qp->npages_send + qp->npages_recv;
} else {
qp->is_kernel = true;
@ -312,12 +329,14 @@ struct ib_qp *pvrdma_create_qp(struct ib_pd *pd,
if (!qp->is_kernel) {
pvrdma_page_dir_insert_umem(&qp->pdir, qp->sumem, 0);
pvrdma_page_dir_insert_umem(&qp->pdir, qp->rumem,
qp->npages_send);
if (!is_srq)
pvrdma_page_dir_insert_umem(&qp->pdir,
qp->rumem,
qp->npages_send);
} else {
/* Ring state is always the first page. */
qp->sq.ring = qp->pdir.pages[0];
qp->rq.ring = &qp->sq.ring[1];
qp->rq.ring = is_srq ? NULL : &qp->sq.ring[1];
}
break;
default:
@ -333,6 +352,10 @@ struct ib_qp *pvrdma_create_qp(struct ib_pd *pd,
cmd->pd_handle = to_vpd(pd)->pd_handle;
cmd->send_cq_handle = to_vcq(init_attr->send_cq)->cq_handle;
cmd->recv_cq_handle = to_vcq(init_attr->recv_cq)->cq_handle;
if (is_srq)
cmd->srq_handle = to_vsrq(init_attr->srq)->srq_handle;
else
cmd->srq_handle = 0;
cmd->max_send_wr = init_attr->cap.max_send_wr;
cmd->max_recv_wr = init_attr->cap.max_recv_wr;
cmd->max_send_sge = init_attr->cap.max_send_sge;
@ -340,6 +363,8 @@ struct ib_qp *pvrdma_create_qp(struct ib_pd *pd,
cmd->max_inline_data = init_attr->cap.max_inline_data;
cmd->sq_sig_all = (init_attr->sq_sig_type == IB_SIGNAL_ALL_WR) ? 1 : 0;
cmd->qp_type = ib_qp_type_to_pvrdma(init_attr->qp_type);
cmd->is_srq = is_srq;
cmd->lkey = 0;
cmd->access_flags = IB_ACCESS_LOCAL_WRITE;
cmd->total_chunks = qp->npages;
cmd->send_chunks = qp->npages_send - PVRDMA_QP_NUM_HEADER_PAGES;
@ -815,6 +840,12 @@ int pvrdma_post_recv(struct ib_qp *ibqp, struct ib_recv_wr *wr,
return -EINVAL;
}
if (qp->srq) {
dev_warn(&dev->pdev->dev, "QP associated with SRQ\n");
*bad_wr = wr;
return -EINVAL;
}
spin_lock_irqsave(&qp->rq.lock, flags);
while (wr) {

319
drivers/infiniband/hw/vmw_pvrdma/pvrdma_srq.c Normal file
View File

@ -0,0 +1,319 @@
/*
* Copyright (c) 2016-2017 VMware, Inc. All rights reserved.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of EITHER the GNU General Public License
* version 2 as published by the Free Software Foundation or the BSD
* 2-Clause License. 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 version 2 for more details at
* http://www.gnu.org/licenses/old-licenses/gpl-2.0.en.html.
*
* You should have received a copy of the GNU General Public License
* along with this program available in the file COPYING in the main
* directory of this source tree.
*
* The BSD 2-Clause 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.
*
* 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 HOLDER 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.
*/
#include <asm/page.h>
#include <linux/io.h>
#include <linux/wait.h>
#include <rdma/ib_addr.h>
#include <rdma/ib_smi.h>
#include <rdma/ib_user_verbs.h>
#include "pvrdma.h"
int pvrdma_post_srq_recv(struct ib_srq *ibsrq, struct ib_recv_wr *wr,
struct ib_recv_wr **bad_wr)
{
/* No support for kernel clients. */
return -EOPNOTSUPP;
}
/**
* pvrdma_query_srq - query shared receive queue
* @ibsrq: the shared receive queue to query
* @srq_attr: attributes to query and return to client
*
* @return: 0 for success, otherwise returns an errno.
*/
int pvrdma_query_srq(struct ib_srq *ibsrq, struct ib_srq_attr *srq_attr)
{
struct pvrdma_dev *dev = to_vdev(ibsrq->device);
struct pvrdma_srq *srq = to_vsrq(ibsrq);
union pvrdma_cmd_req req;
union pvrdma_cmd_resp rsp;
struct pvrdma_cmd_query_srq *cmd = &req.query_srq;
struct pvrdma_cmd_query_srq_resp *resp = &rsp.query_srq_resp;
int ret;
memset(cmd, 0, sizeof(*cmd));
cmd->hdr.cmd = PVRDMA_CMD_QUERY_SRQ;
cmd->srq_handle = srq->srq_handle;
ret = pvrdma_cmd_post(dev, &req, &rsp, PVRDMA_CMD_QUERY_SRQ_RESP);
if (ret < 0) {
dev_warn(&dev->pdev->dev,
"could not query shared receive queue, error: %d\n",
ret);
return -EINVAL;
}
srq_attr->srq_limit = resp->attrs.srq_limit;
srq_attr->max_wr = resp->attrs.max_wr;
srq_attr->max_sge = resp->attrs.max_sge;
return 0;
}
/**
* pvrdma_create_srq - create shared receive queue
* @pd: protection domain
* @init_attr: shared receive queue attributes
* @udata: user data
*
* @return: the ib_srq pointer on success, otherwise returns an errno.
*/
struct ib_srq *pvrdma_create_srq(struct ib_pd *pd,
struct ib_srq_init_attr *init_attr,
struct ib_udata *udata)
{
struct pvrdma_srq *srq = NULL;
struct pvrdma_dev *dev = to_vdev(pd->device);
union pvrdma_cmd_req req;
union pvrdma_cmd_resp rsp;
struct pvrdma_cmd_create_srq *cmd = &req.create_srq;
struct pvrdma_cmd_create_srq_resp *resp = &rsp.create_srq_resp;
struct pvrdma_create_srq ucmd;
unsigned long flags;
int ret;
if (!(pd->uobject && udata)) {
/* No support for kernel clients. */
dev_warn(&dev->pdev->dev,
"no shared receive queue support for kernel client\n");
return ERR_PTR(-EOPNOTSUPP);
}
if (init_attr->srq_type != IB_SRQT_BASIC) {
dev_warn(&dev->pdev->dev,
"shared receive queue type %d not supported\n",
init_attr->srq_type);
return ERR_PTR(-EINVAL);
}
if (init_attr->attr.max_wr > dev->dsr->caps.max_srq_wr ||
init_attr->attr.max_sge > dev->dsr->caps.max_srq_sge) {
dev_warn(&dev->pdev->dev,
"shared receive queue size invalid\n");
return ERR_PTR(-EINVAL);
}
if (!atomic_add_unless(&dev->num_srqs, 1, dev->dsr->caps.max_srq))
return ERR_PTR(-ENOMEM);
srq = kmalloc(sizeof(*srq), GFP_KERNEL);
if (!srq) {
ret = -ENOMEM;
goto err_srq;
}
spin_lock_init(&srq->lock);
refcount_set(&srq->refcnt, 1);
init_waitqueue_head(&srq->wait);
dev_dbg(&dev->pdev->dev,
"create shared receive queue from user space\n");
if (ib_copy_from_udata(&ucmd, udata, sizeof(ucmd))) {
ret = -EFAULT;
goto err_srq;
}
srq->umem = ib_umem_get(pd->uobject->context,
ucmd.buf_addr,
ucmd.buf_size, 0, 0);
if (IS_ERR(srq->umem)) {
ret = PTR_ERR(srq->umem);
goto err_srq;
}
srq->npages = ib_umem_page_count(srq->umem);
if (srq->npages < 0 || srq->npages > PVRDMA_PAGE_DIR_MAX_PAGES) {
dev_warn(&dev->pdev->dev,
"overflow pages in shared receive queue\n");
ret = -EINVAL;
goto err_umem;
}
ret = pvrdma_page_dir_init(dev, &srq->pdir, srq->npages, false);
if (ret) {
dev_warn(&dev->pdev->dev,
"could not allocate page directory\n");
goto err_umem;
}
pvrdma_page_dir_insert_umem(&srq->pdir, srq->umem, 0);
memset(cmd, 0, sizeof(*cmd));
cmd->hdr.cmd = PVRDMA_CMD_CREATE_SRQ;
cmd->srq_type = init_attr->srq_type;
cmd->nchunks = srq->npages;
cmd->pd_handle = to_vpd(pd)->pd_handle;
cmd->attrs.max_wr = init_attr->attr.max_wr;
cmd->attrs.max_sge = init_attr->attr.max_sge;
cmd->attrs.srq_limit = init_attr->attr.srq_limit;
cmd->pdir_dma = srq->pdir.dir_dma;
ret = pvrdma_cmd_post(dev, &req, &rsp, PVRDMA_CMD_CREATE_SRQ_RESP);
if (ret < 0) {
dev_warn(&dev->pdev->dev,
"could not create shared receive queue, error: %d\n",
ret);
goto err_page_dir;
}
srq->srq_handle = resp->srqn;
spin_lock_irqsave(&dev->srq_tbl_lock, flags);
dev->srq_tbl[srq->srq_handle % dev->dsr->caps.max_srq] = srq;
spin_unlock_irqrestore(&dev->srq_tbl_lock, flags);
/* Copy udata back. */
if (ib_copy_to_udata(udata, &srq->srq_handle, sizeof(__u32))) {
dev_warn(&dev->pdev->dev, "failed to copy back udata\n");
pvrdma_destroy_srq(&srq->ibsrq);
return ERR_PTR(-EINVAL);
}
return &srq->ibsrq;
err_page_dir:
pvrdma_page_dir_cleanup(dev, &srq->pdir);
err_umem:
ib_umem_release(srq->umem);
err_srq:
kfree(srq);
atomic_dec(&dev->num_srqs);
return ERR_PTR(ret);
}
static void pvrdma_free_srq(struct pvrdma_dev *dev, struct pvrdma_srq *srq)
{
unsigned long flags;
spin_lock_irqsave(&dev->srq_tbl_lock, flags);
dev->srq_tbl[srq->srq_handle] = NULL;
spin_unlock_irqrestore(&dev->srq_tbl_lock, flags);
refcount_dec(&srq->refcnt);
wait_event(srq->wait, !refcount_read(&srq->refcnt));
/* There is no support for kernel clients, so this is safe. */
ib_umem_release(srq->umem);
pvrdma_page_dir_cleanup(dev, &srq->pdir);
kfree(srq);
atomic_dec(&dev->num_srqs);
}
/**
* pvrdma_destroy_srq - destroy shared receive queue
* @srq: the shared receive queue to destroy
*
* @return: 0 for success.
*/
int pvrdma_destroy_srq(struct ib_srq *srq)
{
struct pvrdma_srq *vsrq = to_vsrq(srq);
union pvrdma_cmd_req req;
struct pvrdma_cmd_destroy_srq *cmd = &req.destroy_srq;
struct pvrdma_dev *dev = to_vdev(srq->device);
int ret;
memset(cmd, 0, sizeof(*cmd));
cmd->hdr.cmd = PVRDMA_CMD_DESTROY_SRQ;
cmd->srq_handle = vsrq->srq_handle;
ret = pvrdma_cmd_post(dev, &req, NULL, 0);
if (ret < 0)
dev_warn(&dev->pdev->dev,
"destroy shared receive queue failed, error: %d\n",
ret);
pvrdma_free_srq(dev, vsrq);
return 0;
}
/**
* pvrdma_modify_srq - modify shared receive queue attributes
* @ibsrq: the shared receive queue to modify
* @attr: the shared receive queue's new attributes
* @attr_mask: attributes mask
* @udata: user data
*
* @returns 0 on success, otherwise returns an errno.
*/
int pvrdma_modify_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr,
enum ib_srq_attr_mask attr_mask, struct ib_udata *udata)
{
struct pvrdma_srq *vsrq = to_vsrq(ibsrq);
union pvrdma_cmd_req req;
struct pvrdma_cmd_modify_srq *cmd = &req.modify_srq;
struct pvrdma_dev *dev = to_vdev(ibsrq->device);
int ret;
/* Only support SRQ limit. */
if (!(attr_mask & IB_SRQ_LIMIT))
return -EINVAL;
memset(cmd, 0, sizeof(*cmd));
cmd->hdr.cmd = PVRDMA_CMD_MODIFY_SRQ;
cmd->srq_handle = vsrq->srq_handle;
cmd->attrs.srq_limit = attr->srq_limit;
cmd->attr_mask = attr_mask;
ret = pvrdma_cmd_post(dev, &req, NULL, 0);
if (ret < 0) {
dev_warn(&dev->pdev->dev,
"could not modify shared receive queue, error: %d\n",
ret);
return -EINVAL;
}
return ret;
}

3
drivers/infiniband/hw/vmw_pvrdma/pvrdma_verbs.c
View File

@ -85,6 +85,9 @@ int pvrdma_query_device(struct ib_device *ibdev,
props->max_sge = dev->dsr->caps.max_sge;
props->max_sge_rd = PVRDMA_GET_CAP(dev, dev->dsr->caps.max_sge,
dev->dsr->caps.max_sge_rd);
props->max_srq = dev->dsr->caps.max_srq;
props->max_srq_wr = dev->dsr->caps.max_srq_wr;
props->max_srq_sge = dev->dsr->caps.max_srq_sge;
props->max_cq = dev->dsr->caps.max_cq;
props->max_cqe = dev->dsr->caps.max_cqe;
props->max_mr = dev->dsr->caps.max_mr;

18
drivers/infiniband/hw/vmw_pvrdma/pvrdma_verbs.h
View File

@ -324,6 +324,13 @@ enum pvrdma_mw_type {
PVRDMA_MW_TYPE_2 = 2,
};
struct pvrdma_srq_attr {
u32 max_wr;
u32 max_sge;
u32 srq_limit;
u32 reserved;
};
struct pvrdma_qp_attr {
enum pvrdma_qp_state qp_state;
enum pvrdma_qp_state cur_qp_state;
@ -420,6 +427,17 @@ int pvrdma_req_notify_cq(struct ib_cq *cq, enum ib_cq_notify_flags flags);
struct ib_ah *pvrdma_create_ah(struct ib_pd *pd, struct rdma_ah_attr *ah_attr,
struct ib_udata *udata);
int pvrdma_destroy_ah(struct ib_ah *ah);
struct ib_srq *pvrdma_create_srq(struct ib_pd *pd,
struct ib_srq_init_attr *init_attr,
struct ib_udata *udata);
int pvrdma_modify_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr,
enum ib_srq_attr_mask attr_mask, struct ib_udata *udata);
int pvrdma_query_srq(struct ib_srq *srq, struct ib_srq_attr *srq_attr);
int pvrdma_destroy_srq(struct ib_srq *srq);
int pvrdma_post_srq_recv(struct ib_srq *ibsrq, struct ib_recv_wr *wr,
struct ib_recv_wr **bad_wr);
struct ib_qp *pvrdma_create_qp(struct ib_pd *pd,
struct ib_qp_init_attr *init_attr,
struct ib_udata *udata);

2
include/uapi/rdma/vmw_pvrdma-abi.h
View File

@ -158,6 +158,8 @@ struct pvrdma_resize_cq {
struct pvrdma_create_srq {
__u64 buf_addr;
__u32 buf_size;
__u32 reserved;
};
struct pvrdma_create_srq_resp {