![Shlomo Pongratz](/assets/img/avatar_default.png)
Signed-off-by: Shlomo Pongratz <shlomop@mellanox.com> [ Replace one more printk_once() with pr_info_once(). - Roland ] Signed-off-by: Roland Dreier <roland@purestorage.com>
369 lines
9 KiB
C
369 lines
9 KiB
C
/*
|
|
* Copyright (c) 2007 Cisco Systems, Inc. All rights reserved.
|
|
* Copyright (c) 2007, 2008 Mellanox Technologies. 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/mlx4/qp.h>
|
|
#include <linux/mlx4/srq.h>
|
|
#include <linux/slab.h>
|
|
|
|
#include "mlx4_ib.h"
|
|
#include "user.h"
|
|
|
|
static void *get_wqe(struct mlx4_ib_srq *srq, int n)
|
|
{
|
|
return mlx4_buf_offset(&srq->buf, n << srq->msrq.wqe_shift);
|
|
}
|
|
|
|
static void mlx4_ib_srq_event(struct mlx4_srq *srq, enum mlx4_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 MLX4_EVENT_TYPE_SRQ_LIMIT:
|
|
event.event = IB_EVENT_SRQ_LIMIT_REACHED;
|
|
break;
|
|
case MLX4_EVENT_TYPE_SRQ_CATAS_ERROR:
|
|
event.event = IB_EVENT_SRQ_ERR;
|
|
break;
|
|
default:
|
|
pr_warn("Unexpected event type %d "
|
|
"on SRQ %06x\n", type, srq->srqn);
|
|
return;
|
|
}
|
|
|
|
ibsrq->event_handler(&event, ibsrq->srq_context);
|
|
}
|
|
}
|
|
|
|
struct ib_srq *mlx4_ib_create_srq(struct ib_pd *pd,
|
|
struct ib_srq_init_attr *init_attr,
|
|
struct ib_udata *udata)
|
|
{
|
|
struct mlx4_ib_dev *dev = to_mdev(pd->device);
|
|
struct mlx4_ib_srq *srq;
|
|
struct mlx4_wqe_srq_next_seg *next;
|
|
struct mlx4_wqe_data_seg *scatter;
|
|
u32 cqn;
|
|
u16 xrcdn;
|
|
int desc_size;
|
|
int buf_size;
|
|
int err;
|
|
int i;
|
|
|
|
/* Sanity check SRQ size before proceeding */
|
|
if (init_attr->attr.max_wr >= dev->dev->caps.max_srq_wqes ||
|
|
init_attr->attr.max_sge > dev->dev->caps.max_srq_sge)
|
|
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 = max(32UL,
|
|
roundup_pow_of_two(sizeof (struct mlx4_wqe_srq_next_seg) +
|
|
srq->msrq.max_gs *
|
|
sizeof (struct mlx4_wqe_data_seg)));
|
|
srq->msrq.wqe_shift = ilog2(desc_size);
|
|
|
|
buf_size = srq->msrq.max * desc_size;
|
|
|
|
if (pd->uobject) {
|
|
struct mlx4_ib_create_srq ucmd;
|
|
|
|
if (ib_copy_from_udata(&ucmd, udata, sizeof ucmd)) {
|
|
err = -EFAULT;
|
|
goto err_srq;
|
|
}
|
|
|
|
srq->umem = ib_umem_get(pd->uobject->context, ucmd.buf_addr,
|
|
buf_size, 0, 0);
|
|
if (IS_ERR(srq->umem)) {
|
|
err = PTR_ERR(srq->umem);
|
|
goto err_srq;
|
|
}
|
|
|
|
err = mlx4_mtt_init(dev->dev, ib_umem_page_count(srq->umem),
|
|
ilog2(srq->umem->page_size), &srq->mtt);
|
|
if (err)
|
|
goto err_buf;
|
|
|
|
err = mlx4_ib_umem_write_mtt(dev, &srq->mtt, srq->umem);
|
|
if (err)
|
|
goto err_mtt;
|
|
|
|
err = mlx4_ib_db_map_user(to_mucontext(pd->uobject->context),
|
|
ucmd.db_addr, &srq->db);
|
|
if (err)
|
|
goto err_mtt;
|
|
} else {
|
|
err = mlx4_db_alloc(dev->dev, &srq->db, 0);
|
|
if (err)
|
|
goto err_srq;
|
|
|
|
*srq->db.db = 0;
|
|
|
|
if (mlx4_buf_alloc(dev->dev, buf_size, PAGE_SIZE * 2, &srq->buf)) {
|
|
err = -ENOMEM;
|
|
goto err_db;
|
|
}
|
|
|
|
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));
|
|
|
|
for (scatter = (void *) (next + 1);
|
|
(void *) scatter < (void *) next + desc_size;
|
|
++scatter)
|
|
scatter->lkey = cpu_to_be32(MLX4_INVALID_LKEY);
|
|
}
|
|
|
|
err = mlx4_mtt_init(dev->dev, srq->buf.npages, srq->buf.page_shift,
|
|
&srq->mtt);
|
|
if (err)
|
|
goto err_buf;
|
|
|
|
err = mlx4_buf_write_mtt(dev->dev, &srq->mtt, &srq->buf);
|
|
if (err)
|
|
goto err_mtt;
|
|
|
|
srq->wrid = kmalloc(srq->msrq.max * sizeof (u64), GFP_KERNEL);
|
|
if (!srq->wrid) {
|
|
err = -ENOMEM;
|
|
goto err_mtt;
|
|
}
|
|
}
|
|
|
|
cqn = (init_attr->srq_type == IB_SRQT_XRC) ?
|
|
to_mcq(init_attr->ext.xrc.cq)->mcq.cqn : 0;
|
|
xrcdn = (init_attr->srq_type == IB_SRQT_XRC) ?
|
|
to_mxrcd(init_attr->ext.xrc.xrcd)->xrcdn :
|
|
(u16) dev->dev->caps.reserved_xrcds;
|
|
err = mlx4_srq_alloc(dev->dev, to_mpd(pd)->pdn, cqn, xrcdn, &srq->mtt,
|
|
srq->db.dma, &srq->msrq);
|
|
if (err)
|
|
goto err_wrid;
|
|
|
|
srq->msrq.event = mlx4_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))) {
|
|
err = -EFAULT;
|
|
goto err_wrid;
|
|
}
|
|
|
|
init_attr->attr.max_wr = srq->msrq.max - 1;
|
|
|
|
return &srq->ibsrq;
|
|
|
|
err_wrid:
|
|
if (pd->uobject)
|
|
mlx4_ib_db_unmap_user(to_mucontext(pd->uobject->context), &srq->db);
|
|
else
|
|
kfree(srq->wrid);
|
|
|
|
err_mtt:
|
|
mlx4_mtt_cleanup(dev->dev, &srq->mtt);
|
|
|
|
err_buf:
|
|
if (pd->uobject)
|
|
ib_umem_release(srq->umem);
|
|
else
|
|
mlx4_buf_free(dev->dev, buf_size, &srq->buf);
|
|
|
|
err_db:
|
|
if (!pd->uobject)
|
|
mlx4_db_free(dev->dev, &srq->db);
|
|
|
|
err_srq:
|
|
kfree(srq);
|
|
|
|
return ERR_PTR(err);
|
|
}
|
|
|
|
int mlx4_ib_modify_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr,
|
|
enum ib_srq_attr_mask attr_mask, struct ib_udata *udata)
|
|
{
|
|
struct mlx4_ib_dev *dev = to_mdev(ibsrq->device);
|
|
struct mlx4_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 = mlx4_srq_arm(dev->dev, &srq->msrq, attr->srq_limit);
|
|
mutex_unlock(&srq->mutex);
|
|
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int mlx4_ib_query_srq(struct ib_srq *ibsrq, struct ib_srq_attr *srq_attr)
|
|
{
|
|
struct mlx4_ib_dev *dev = to_mdev(ibsrq->device);
|
|
struct mlx4_ib_srq *srq = to_msrq(ibsrq);
|
|
int ret;
|
|
int limit_watermark;
|
|
|
|
ret = mlx4_srq_query(dev->dev, &srq->msrq, &limit_watermark);
|
|
if (ret)
|
|
return ret;
|
|
|
|
srq_attr->srq_limit = limit_watermark;
|
|
srq_attr->max_wr = srq->msrq.max - 1;
|
|
srq_attr->max_sge = srq->msrq.max_gs;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int mlx4_ib_destroy_srq(struct ib_srq *srq)
|
|
{
|
|
struct mlx4_ib_dev *dev = to_mdev(srq->device);
|
|
struct mlx4_ib_srq *msrq = to_msrq(srq);
|
|
|
|
mlx4_srq_free(dev->dev, &msrq->msrq);
|
|
mlx4_mtt_cleanup(dev->dev, &msrq->mtt);
|
|
|
|
if (srq->uobject) {
|
|
mlx4_ib_db_unmap_user(to_mucontext(srq->uobject->context), &msrq->db);
|
|
ib_umem_release(msrq->umem);
|
|
} else {
|
|
kfree(msrq->wrid);
|
|
mlx4_buf_free(dev->dev, msrq->msrq.max << msrq->msrq.wqe_shift,
|
|
&msrq->buf);
|
|
mlx4_db_free(dev->dev, &msrq->db);
|
|
}
|
|
|
|
kfree(msrq);
|
|
|
|
return 0;
|
|
}
|
|
|
|
void mlx4_ib_free_srq_wqe(struct mlx4_ib_srq *srq, int wqe_index)
|
|
{
|
|
struct mlx4_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 mlx4_ib_post_srq_recv(struct ib_srq *ibsrq, struct ib_recv_wr *wr,
|
|
struct ib_recv_wr **bad_wr)
|
|
{
|
|
struct mlx4_ib_srq *srq = to_msrq(ibsrq);
|
|
struct mlx4_wqe_srq_next_seg *next;
|
|
struct mlx4_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 mlx4_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_gs) {
|
|
scat[i].byte_count = 0;
|
|
scat[i].lkey = cpu_to_be32(MLX4_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;
|
|
}
|