mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
470 lines
11 KiB
470 lines
11 KiB
// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB |
|
/* |
|
* Copyright (c) 2013-2018, Mellanox Technologies inc. All rights reserved. |
|
*/ |
|
|
|
#include <linux/module.h> |
|
#include <linux/mlx5/qp.h> |
|
#include <linux/slab.h> |
|
#include <rdma/ib_umem.h> |
|
#include <rdma/ib_user_verbs.h> |
|
#include "mlx5_ib.h" |
|
#include "srq.h" |
|
|
|
static void *get_wqe(struct mlx5_ib_srq *srq, int n) |
|
{ |
|
return mlx5_frag_buf_get_wqe(&srq->fbc, n); |
|
} |
|
|
|
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_srq_attr *in, |
|
struct ib_udata *udata, int buf_size) |
|
{ |
|
struct mlx5_ib_dev *dev = to_mdev(pd->device); |
|
struct mlx5_ib_create_srq ucmd = {}; |
|
struct mlx5_ib_ucontext *ucontext = rdma_udata_to_drv_context( |
|
udata, struct mlx5_ib_ucontext, ibucontext); |
|
size_t ucmdlen; |
|
int err; |
|
u32 uidx = MLX5_IB_DEFAULT_UIDX; |
|
|
|
ucmdlen = min(udata->inlen, sizeof(ucmd)); |
|
|
|
if (ib_copy_from_udata(&ucmd, udata, ucmdlen)) { |
|
mlx5_ib_dbg(dev, "failed copy udata\n"); |
|
return -EFAULT; |
|
} |
|
|
|
if (ucmd.reserved0 || ucmd.reserved1) |
|
return -EINVAL; |
|
|
|
if (udata->inlen > sizeof(ucmd) && |
|
!ib_is_udata_cleared(udata, sizeof(ucmd), |
|
udata->inlen - sizeof(ucmd))) |
|
return -EINVAL; |
|
|
|
if (in->type != IB_SRQT_BASIC) { |
|
err = get_srq_user_index(ucontext, &ucmd, udata->inlen, &uidx); |
|
if (err) |
|
return err; |
|
} |
|
|
|
srq->wq_sig = !!(ucmd.flags & MLX5_SRQ_FLAG_SIGNATURE); |
|
|
|
srq->umem = ib_umem_get(pd->device, ucmd.buf_addr, buf_size, 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; |
|
} |
|
in->umem = srq->umem; |
|
|
|
err = mlx5_ib_db_map_user(ucontext, ucmd.db_addr, &srq->db); |
|
if (err) { |
|
mlx5_ib_dbg(dev, "map doorbell failed\n"); |
|
goto err_umem; |
|
} |
|
|
|
in->uid = (in->type != IB_SRQT_XRC) ? to_mpd(pd)->uid : 0; |
|
if (MLX5_CAP_GEN(dev->mdev, cqe_version) == MLX5_CQE_VERSION_V1 && |
|
in->type != IB_SRQT_BASIC) |
|
in->user_index = uidx; |
|
|
|
return 0; |
|
|
|
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_srq_attr *in, int buf_size) |
|
{ |
|
int err; |
|
int i; |
|
struct mlx5_wqe_srq_next_seg *next; |
|
|
|
err = mlx5_db_alloc(dev->mdev, &srq->db); |
|
if (err) { |
|
mlx5_ib_warn(dev, "alloc dbell rec failed\n"); |
|
return err; |
|
} |
|
|
|
if (mlx5_frag_buf_alloc_node(dev->mdev, buf_size, &srq->buf, |
|
dev->mdev->priv.numa_node)) { |
|
mlx5_ib_dbg(dev, "buf alloc failed\n"); |
|
err = -ENOMEM; |
|
goto err_db; |
|
} |
|
|
|
mlx5_init_fbc(srq->buf.frags, srq->msrq.wqe_shift, ilog2(srq->msrq.max), |
|
&srq->fbc); |
|
|
|
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)); |
|
} |
|
|
|
mlx5_ib_dbg(dev, "srq->buf.page_shift = %d\n", srq->buf.page_shift); |
|
in->pas = kvcalloc(srq->buf.npages, sizeof(*in->pas), GFP_KERNEL); |
|
if (!in->pas) { |
|
err = -ENOMEM; |
|
goto err_buf; |
|
} |
|
mlx5_fill_page_frag_array(&srq->buf, in->pas); |
|
|
|
srq->wrid = kvmalloc_array(srq->msrq.max, sizeof(u64), GFP_KERNEL); |
|
if (!srq->wrid) { |
|
err = -ENOMEM; |
|
goto err_in; |
|
} |
|
srq->wq_sig = 0; |
|
|
|
in->log_page_size = srq->buf.page_shift - MLX5_ADAPTER_PAGE_SHIFT; |
|
if (MLX5_CAP_GEN(dev->mdev, cqe_version) == MLX5_CQE_VERSION_V1 && |
|
in->type != IB_SRQT_BASIC) |
|
in->user_index = MLX5_IB_DEFAULT_UIDX; |
|
|
|
return 0; |
|
|
|
err_in: |
|
kvfree(in->pas); |
|
|
|
err_buf: |
|
mlx5_frag_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, |
|
struct ib_udata *udata) |
|
{ |
|
mlx5_ib_db_unmap_user( |
|
rdma_udata_to_drv_context( |
|
udata, |
|
struct mlx5_ib_ucontext, |
|
ibucontext), |
|
&srq->db); |
|
ib_umem_release(srq->umem); |
|
} |
|
|
|
|
|
static void destroy_srq_kernel(struct mlx5_ib_dev *dev, struct mlx5_ib_srq *srq) |
|
{ |
|
kvfree(srq->wrid); |
|
mlx5_frag_buf_free(dev->mdev, &srq->buf); |
|
mlx5_db_free(dev->mdev, &srq->db); |
|
} |
|
|
|
int mlx5_ib_create_srq(struct ib_srq *ib_srq, |
|
struct ib_srq_init_attr *init_attr, |
|
struct ib_udata *udata) |
|
{ |
|
struct mlx5_ib_dev *dev = to_mdev(ib_srq->device); |
|
struct mlx5_ib_srq *srq = to_msrq(ib_srq); |
|
size_t desc_size; |
|
size_t buf_size; |
|
int err; |
|
struct mlx5_srq_attr in = {}; |
|
__u32 max_srq_wqes = 1 << MLX5_CAP_GEN(dev->mdev, log_max_srq_sz); |
|
|
|
if (init_attr->srq_type != IB_SRQT_BASIC && |
|
init_attr->srq_type != IB_SRQT_XRC && |
|
init_attr->srq_type != IB_SRQT_TM) |
|
return -EOPNOTSUPP; |
|
|
|
/* Sanity check SRQ size before proceeding */ |
|
if (init_attr->attr.max_wr >= max_srq_wqes) { |
|
mlx5_ib_dbg(dev, "max_wr %d, cap %d\n", |
|
init_attr->attr.max_wr, |
|
max_srq_wqes); |
|
return -EINVAL; |
|
} |
|
|
|
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); |
|
if (desc_size == 0 || srq->msrq.max_gs > desc_size) |
|
return -EINVAL; |
|
|
|
desc_size = roundup_pow_of_two(desc_size); |
|
desc_size = max_t(size_t, 32, desc_size); |
|
if (desc_size < sizeof(struct mlx5_wqe_srq_next_seg)) |
|
return -EINVAL; |
|
|
|
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; |
|
if (buf_size < desc_size) |
|
return -EINVAL; |
|
|
|
in.type = init_attr->srq_type; |
|
|
|
if (udata) |
|
err = create_srq_user(ib_srq->pd, srq, &in, udata, buf_size); |
|
else |
|
err = create_srq_kernel(dev, srq, &in, buf_size); |
|
|
|
if (err) { |
|
mlx5_ib_warn(dev, "create srq %s failed, err %d\n", |
|
udata ? "user" : "kernel", err); |
|
return err; |
|
} |
|
|
|
in.log_size = ilog2(srq->msrq.max); |
|
in.wqe_shift = srq->msrq.wqe_shift - 4; |
|
if (srq->wq_sig) |
|
in.flags |= MLX5_SRQ_FLAG_WQ_SIG; |
|
|
|
if (init_attr->srq_type == IB_SRQT_XRC && init_attr->ext.xrc.xrcd) |
|
in.xrcd = to_mxrcd(init_attr->ext.xrc.xrcd)->xrcdn; |
|
else |
|
in.xrcd = dev->devr.xrcdn0; |
|
|
|
if (init_attr->srq_type == IB_SRQT_TM) { |
|
in.tm_log_list_size = |
|
ilog2(init_attr->ext.tag_matching.max_num_tags) + 1; |
|
if (in.tm_log_list_size > |
|
MLX5_CAP_GEN(dev->mdev, log_tag_matching_list_sz)) { |
|
mlx5_ib_dbg(dev, "TM SRQ max_num_tags exceeding limit\n"); |
|
err = -EINVAL; |
|
goto err_usr_kern_srq; |
|
} |
|
in.flags |= MLX5_SRQ_FLAG_RNDV; |
|
} |
|
|
|
if (ib_srq_has_cq(init_attr->srq_type)) |
|
in.cqn = to_mcq(init_attr->ext.cq)->mcq.cqn; |
|
else |
|
in.cqn = to_mcq(dev->devr.c0)->mcq.cqn; |
|
|
|
in.pd = to_mpd(ib_srq->pd)->pdn; |
|
in.db_record = srq->db.dma; |
|
err = mlx5_cmd_create_srq(dev, &srq->msrq, &in); |
|
kvfree(in.pas); |
|
if (err) { |
|
mlx5_ib_dbg(dev, "create SRQ failed, err %d\n", err); |
|
goto err_usr_kern_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 (udata) { |
|
struct mlx5_ib_create_srq_resp resp = { |
|
.srqn = srq->msrq.srqn, |
|
}; |
|
|
|
if (ib_copy_to_udata(udata, &resp, min(udata->outlen, |
|
sizeof(resp)))) { |
|
mlx5_ib_dbg(dev, "copy to user failed\n"); |
|
err = -EFAULT; |
|
goto err_core; |
|
} |
|
} |
|
|
|
init_attr->attr.max_wr = srq->msrq.max - 1; |
|
|
|
return 0; |
|
|
|
err_core: |
|
mlx5_cmd_destroy_srq(dev, &srq->msrq); |
|
|
|
err_usr_kern_srq: |
|
if (udata) |
|
destroy_srq_user(ib_srq->pd, srq, udata); |
|
else |
|
destroy_srq_kernel(dev, srq); |
|
|
|
return 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_cmd_arm_srq(dev, &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_srq_attr *out; |
|
|
|
out = kzalloc(sizeof(*out), GFP_KERNEL); |
|
if (!out) |
|
return -ENOMEM; |
|
|
|
ret = mlx5_cmd_query_srq(dev, &srq->msrq, out); |
|
if (ret) |
|
goto out_box; |
|
|
|
srq_attr->srq_limit = out->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 ib_udata *udata) |
|
{ |
|
struct mlx5_ib_dev *dev = to_mdev(srq->device); |
|
struct mlx5_ib_srq *msrq = to_msrq(srq); |
|
int ret; |
|
|
|
ret = mlx5_cmd_destroy_srq(dev, &msrq->msrq); |
|
if (ret) |
|
return ret; |
|
|
|
if (udata) |
|
destroy_srq_user(srq->pd, msrq, udata); |
|
else |
|
destroy_srq_kernel(dev, msrq); |
|
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, const struct ib_recv_wr *wr, |
|
const 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; |
|
struct mlx5_ib_dev *dev = to_mdev(ibsrq->device); |
|
struct mlx5_core_dev *mdev = dev->mdev; |
|
unsigned long flags; |
|
int err = 0; |
|
int nreq; |
|
int i; |
|
|
|
spin_lock_irqsave(&srq->lock, flags); |
|
|
|
if (mdev->state == MLX5_DEVICE_STATE_INTERNAL_ERROR) { |
|
err = -EIO; |
|
*bad_wr = wr; |
|
goto out; |
|
} |
|
|
|
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); |
|
} |
|
out: |
|
spin_unlock_irqrestore(&srq->lock, flags); |
|
|
|
return err; |
|
}
|
|
|