int mlx4_destroy_xrc_srq(struct ibv_srq *srq)
{
struct mlx4_context *mctx = to_mctx(srq->context);
struct mlx4_srq *msrq = to_msrq(srq);
struct mlx4_cq *mcq;
int ret;
mcq = to_mcq(msrq->verbs_srq.cq);
mlx4_cq_clean(mcq, 0, msrq);
pthread_spin_lock(&mcq->lock);
mlx4_clear_xsrq(&mctx->xsrq_table, msrq->verbs_srq.srq_num);
pthread_spin_unlock(&mcq->lock);
ret = ibv_cmd_destroy_srq(srq);
if (ret) {
pthread_spin_lock(&mcq->lock);
mlx4_store_xsrq(&mctx->xsrq_table, msrq->verbs_srq.srq_num, msrq);
pthread_spin_unlock(&mcq->lock);
return ret;
}
mlx4_free_db(mctx, MLX4_DB_TYPE_RQ, msrq->db);
mlx4_free_buf(&msrq->buf);
free(msrq->wrid);
free(msrq);
return 0;
}
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 mlx5_ib_post_srq_recv(struct ib_srq *ibsrq, struct ib_recv_wr *wr,
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;
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 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);
}
spin_unlock_irqrestore(&srq->lock, flags);
return err;
}
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);
struct mlx4_ib_cq *cq;
mlx4_srq_invalidate(dev->dev, &msrq->msrq);
if (srq->xrc_cq && !srq->uobject) {
cq = to_mcq(srq->xrc_cq);
spin_lock_irq(&cq->lock);
__mlx4_ib_cq_clean(cq, -1, msrq);
mlx4_srq_remove(dev->dev, &msrq->msrq);
spin_unlock_irq(&cq->lock);
} else
mlx4_srq_remove(dev->dev, &msrq->msrq);
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;
}
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 mlx5_ib_destroy_srq(struct ib_srq *srq)
{
struct mlx5_ib_dev *dev = to_mdev(srq->device);
struct mlx5_ib_srq *msrq = to_msrq(srq);
mlx5_core_destroy_srq(dev->mdev, &msrq->msrq);
if (srq->uobject) {
mlx5_ib_db_unmap_user(to_mucontext(srq->uobject->context), &msrq->db);
ib_umem_release(msrq->umem);
} else {
destroy_srq_kernel(dev, msrq);
}
kfree(srq);
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;
}
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_query_srq_mbox_out *out;
out = kzalloc(sizeof(*out), GFP_KERNEL);
if (!out)
return -ENOMEM;
ret = mlx5_core_query_srq(dev->mdev, &srq->msrq, out);
if (ret)
goto out_box;
srq_attr->srq_limit = be16_to_cpu(out->ctx.lwm);
srq_attr->max_wr = srq->msrq.max - 1;
srq_attr->max_sge = srq->msrq.max_gs;
out_box:
kfree(out);
return ret;
}
static int mlx4_ib_poll_one(struct mlx4_ib_cq *cq,
struct mlx4_ib_qp **cur_qp,
struct ib_wc *wc)
{
struct mlx4_cqe *cqe;
struct mlx4_qp *mqp;
struct mlx4_ib_wq *wq;
struct mlx4_ib_srq *srq;
int is_send;
int is_error;
u32 g_mlpath_rqpn;
u16 wqe_ctr;
repoll:
cqe = next_cqe_sw(cq);
if (!cqe)
return -EAGAIN;
++cq->mcq.cons_index;
/*
* Make sure we read CQ entry contents after we've checked the
* ownership bit.
*/
rmb();
is_send = cqe->owner_sr_opcode & MLX4_CQE_IS_SEND_MASK;
is_error = (cqe->owner_sr_opcode & MLX4_CQE_OPCODE_MASK) ==
MLX4_CQE_OPCODE_ERROR;
if (unlikely((cqe->owner_sr_opcode & MLX4_CQE_OPCODE_MASK) == MLX4_OPCODE_NOP &&
is_send)) {
printk(KERN_WARNING "Completion for NOP opcode detected!\n");
return -EINVAL;
}
/* Resize CQ in progress */
if (unlikely((cqe->owner_sr_opcode & MLX4_CQE_OPCODE_MASK) == MLX4_CQE_OPCODE_RESIZE)) {
if (cq->resize_buf) {
struct mlx4_ib_dev *dev = to_mdev(cq->ibcq.device);
mlx4_ib_free_cq_buf(dev, &cq->buf, cq->ibcq.cqe);
cq->buf = cq->resize_buf->buf;
cq->ibcq.cqe = cq->resize_buf->cqe;
kfree(cq->resize_buf);
cq->resize_buf = NULL;
}
goto repoll;
}
if (!*cur_qp ||
(be32_to_cpu(cqe->vlan_my_qpn) & MLX4_CQE_QPN_MASK) != (*cur_qp)->mqp.qpn) {
/*
* We do not have to take the QP table lock here,
* because CQs will be locked while QPs are removed
* from the table.
*/
mqp = __mlx4_qp_lookup(to_mdev(cq->ibcq.device)->dev,
be32_to_cpu(cqe->vlan_my_qpn));
if (unlikely(!mqp)) {
printk(KERN_WARNING "CQ %06x with entry for unknown QPN %06x\n",
cq->mcq.cqn, be32_to_cpu(cqe->vlan_my_qpn) & MLX4_CQE_QPN_MASK);
return -EINVAL;
}
*cur_qp = to_mibqp(mqp);
}
wc->qp = &(*cur_qp)->ibqp;
if (is_send) {
wq = &(*cur_qp)->sq;
if (!(*cur_qp)->sq_signal_bits) {
wqe_ctr = be16_to_cpu(cqe->wqe_index);
wq->tail += (u16) (wqe_ctr - (u16) wq->tail);
}
wc->wr_id = wq->wrid[wq->tail & (wq->wqe_cnt - 1)];
++wq->tail;
} else if ((*cur_qp)->ibqp.srq) {
srq = to_msrq((*cur_qp)->ibqp.srq);
wqe_ctr = be16_to_cpu(cqe->wqe_index);
wc->wr_id = srq->wrid[wqe_ctr];
mlx4_ib_free_srq_wqe(srq, wqe_ctr);
} else {
wq = &(*cur_qp)->rq;
wc->wr_id = wq->wrid[wq->tail & (wq->wqe_cnt - 1)];
++wq->tail;
}
if (unlikely(is_error)) {
mlx4_ib_handle_error_cqe((struct mlx4_err_cqe *) cqe, wc);
return 0;
}
wc->status = IB_WC_SUCCESS;
if (is_send) {
wc->wc_flags = 0;
switch (cqe->owner_sr_opcode & MLX4_CQE_OPCODE_MASK) {
case MLX4_OPCODE_RDMA_WRITE_IMM:
wc->wc_flags |= IB_WC_WITH_IMM;
case MLX4_OPCODE_RDMA_WRITE:
wc->opcode = IB_WC_RDMA_WRITE;
break;
case MLX4_OPCODE_SEND_IMM:
wc->wc_flags |= IB_WC_WITH_IMM;
case MLX4_OPCODE_SEND:
case MLX4_OPCODE_SEND_INVAL:
wc->opcode = IB_WC_SEND;
break;
case MLX4_OPCODE_RDMA_READ:
wc->opcode = IB_WC_RDMA_READ;
wc->byte_len = be32_to_cpu(cqe->byte_cnt);
break;
case MLX4_OPCODE_ATOMIC_CS:
wc->opcode = IB_WC_COMP_SWAP;
wc->byte_len = 8;
break;
case MLX4_OPCODE_ATOMIC_FA:
wc->opcode = IB_WC_FETCH_ADD;
wc->byte_len = 8;
break;
case MLX4_OPCODE_MASKED_ATOMIC_CS:
wc->opcode = IB_WC_MASKED_COMP_SWAP;
wc->byte_len = 8;
break;
case MLX4_OPCODE_MASKED_ATOMIC_FA:
wc->opcode = IB_WC_MASKED_FETCH_ADD;
wc->byte_len = 8;
break;
case MLX4_OPCODE_BIND_MW:
wc->opcode = IB_WC_BIND_MW;
break;
case MLX4_OPCODE_LSO:
wc->opcode = IB_WC_LSO;
break;
case MLX4_OPCODE_FMR:
wc->opcode = IB_WC_FAST_REG_MR;
break;
case MLX4_OPCODE_LOCAL_INVAL:
wc->opcode = IB_WC_LOCAL_INV;
break;
}
} else {
wc->byte_len = be32_to_cpu(cqe->byte_cnt);
switch (cqe->owner_sr_opcode & MLX4_CQE_OPCODE_MASK) {
case MLX4_RECV_OPCODE_RDMA_WRITE_IMM:
wc->opcode = IB_WC_RECV_RDMA_WITH_IMM;
wc->wc_flags = IB_WC_WITH_IMM;
wc->ex.imm_data = cqe->immed_rss_invalid;
break;
case MLX4_RECV_OPCODE_SEND_INVAL:
wc->opcode = IB_WC_RECV;
wc->wc_flags = IB_WC_WITH_INVALIDATE;
wc->ex.invalidate_rkey = be32_to_cpu(cqe->immed_rss_invalid);
break;
case MLX4_RECV_OPCODE_SEND:
wc->opcode = IB_WC_RECV;
wc->wc_flags = 0;
break;
case MLX4_RECV_OPCODE_SEND_IMM:
wc->opcode = IB_WC_RECV;
wc->wc_flags = IB_WC_WITH_IMM;
wc->ex.imm_data = cqe->immed_rss_invalid;
break;
}
wc->slid = be16_to_cpu(cqe->rlid);
g_mlpath_rqpn = be32_to_cpu(cqe->g_mlpath_rqpn);
wc->src_qp = g_mlpath_rqpn & 0xffffff;
wc->dlid_path_bits = (g_mlpath_rqpn >> 24) & 0x7f;
wc->wc_flags |= g_mlpath_rqpn & 0x80000000 ? IB_WC_GRH : 0;
wc->pkey_index = be32_to_cpu(cqe->immed_rss_invalid) & 0x7f;
wc->csum_ok = mlx4_ib_ipoib_csum_ok(cqe->status, cqe->checksum);
if (rdma_port_get_link_layer(wc->qp->device,
(*cur_qp)->port) == IB_LINK_LAYER_ETHERNET)
wc->sl = be16_to_cpu(cqe->sl_vid) >> 13;
else
wc->sl = be16_to_cpu(cqe->sl_vid) >> 12;
}
static int mlx4_poll_one(struct mlx4_cq *cq,
struct mlx4_qp **cur_qp,
struct ibv_wc *wc)
{
struct mlx4_wq *wq;
struct mlx4_cqe *cqe;
struct mlx4_srq *srq = NULL;
uint32_t qpn;
uint32_t srqn;
uint32_t g_mlpath_rqpn;
uint16_t wqe_index;
int is_error;
int is_send;
cqe = next_cqe_sw(cq);
if (!cqe)
return CQ_EMPTY;
++cq->cons_index;
VALGRIND_MAKE_MEM_DEFINED(cqe, sizeof *cqe);
/*
* Make sure we read CQ entry contents after we've checked the
* ownership bit.
*/
rmb();
qpn = ntohl(cqe->my_qpn);
is_send = cqe->owner_sr_opcode & MLX4_CQE_IS_SEND_MASK;
is_error = (cqe->owner_sr_opcode & MLX4_CQE_OPCODE_MASK) ==
MLX4_CQE_OPCODE_ERROR;
if (qpn & MLX4_XRC_QPN_BIT && !is_send) {
srqn = ntohl(cqe->g_mlpath_rqpn) & 0xffffff;
/*
* We do not have to take the XRC SRQ table lock here,
* because CQs will be locked while XRC SRQs are removed
* from the table.
*/
srq = mlx4_find_xrc_srq(to_mctx(cq->ibv_cq.context), srqn);
if (!srq)
return CQ_POLL_ERR;
} else if (!*cur_qp || (qpn & 0xffffff) != (*cur_qp)->ibv_qp.qp_num) {
/*
* We do not have to take the QP table lock here,
* because CQs will be locked while QPs are removed
* from the table.
*/
*cur_qp = mlx4_find_qp(to_mctx(cq->ibv_cq.context),
qpn & 0xffffff);
if (!*cur_qp)
return CQ_POLL_ERR;
}
wc->qp_num = qpn & 0xffffff;
if (is_send) {
wq = &(*cur_qp)->sq;
wqe_index = ntohs(cqe->wqe_index);
wq->tail += (uint16_t) (wqe_index - (uint16_t) wq->tail);
wc->wr_id = wq->wrid[wq->tail & (wq->wqe_cnt - 1)];
++wq->tail;
} else if (srq) {
wqe_index = htons(cqe->wqe_index);
wc->wr_id = srq->wrid[wqe_index];
mlx4_free_srq_wqe(srq, wqe_index);
} else if ((*cur_qp)->ibv_qp.srq) {
srq = to_msrq((*cur_qp)->ibv_qp.srq);
wqe_index = htons(cqe->wqe_index);
wc->wr_id = srq->wrid[wqe_index];
mlx4_free_srq_wqe(srq, wqe_index);
} else {
wq = &(*cur_qp)->rq;
wc->wr_id = wq->wrid[wq->tail & (wq->wqe_cnt - 1)];
++wq->tail;
}
if (is_error) {
mlx4_handle_error_cqe((struct mlx4_err_cqe *) cqe, wc);
return CQ_OK;
}
wc->status = IBV_WC_SUCCESS;
if (is_send) {
wc->wc_flags = 0;
switch (cqe->owner_sr_opcode & MLX4_CQE_OPCODE_MASK) {
case MLX4_OPCODE_RDMA_WRITE_IMM:
wc->wc_flags |= IBV_WC_WITH_IMM;
case MLX4_OPCODE_RDMA_WRITE:
wc->opcode = IBV_WC_RDMA_WRITE;
break;
case MLX4_OPCODE_SEND_IMM:
wc->wc_flags |= IBV_WC_WITH_IMM;
case MLX4_OPCODE_SEND:
wc->opcode = IBV_WC_SEND;
break;
case MLX4_OPCODE_RDMA_READ:
wc->opcode = IBV_WC_RDMA_READ;
wc->byte_len = ntohl(cqe->byte_cnt);
break;
case MLX4_OPCODE_ATOMIC_CS:
wc->opcode = IBV_WC_COMP_SWAP;
wc->byte_len = 8;
break;
case MLX4_OPCODE_ATOMIC_FA:
wc->opcode = IBV_WC_FETCH_ADD;
wc->byte_len = 8;
break;
case MLX4_OPCODE_BIND_MW:
wc->opcode = IBV_WC_BIND_MW;
break;
default:
/* assume it's a send completion */
wc->opcode = IBV_WC_SEND;
break;
}
} else {
wc->byte_len = ntohl(cqe->byte_cnt);
switch (cqe->owner_sr_opcode & MLX4_CQE_OPCODE_MASK) {
case MLX4_RECV_OPCODE_RDMA_WRITE_IMM:
wc->opcode = IBV_WC_RECV_RDMA_WITH_IMM;
wc->wc_flags = IBV_WC_WITH_IMM;
wc->imm_data = cqe->immed_rss_invalid;
break;
case MLX4_RECV_OPCODE_SEND:
wc->opcode = IBV_WC_RECV;
wc->wc_flags = 0;
break;
case MLX4_RECV_OPCODE_SEND_IMM:
wc->opcode = IBV_WC_RECV;
wc->wc_flags = IBV_WC_WITH_IMM;
wc->imm_data = cqe->immed_rss_invalid;
break;
}
wc->slid = ntohs(cqe->rlid);
wc->sl = cqe->sl >> 4;
g_mlpath_rqpn = ntohl(cqe->g_mlpath_rqpn);
wc->src_qp = g_mlpath_rqpn & 0xffffff;
wc->dlid_path_bits = (g_mlpath_rqpn >> 24) & 0x7f;
wc->wc_flags |= g_mlpath_rqpn & 0x80000000 ? IBV_WC_GRH : 0;
wc->pkey_index = ntohl(cqe->immed_rss_invalid) & 0x7f;
}
return CQ_OK;
}
int mthca_tavor_post_srq_recv(struct ibv_srq *ibsrq,
struct ibv_recv_wr *wr,
struct ibv_recv_wr **bad_wr)
{
struct mthca_srq *srq = to_msrq(ibsrq);
uint32_t doorbell[2];
int err = 0;
int first_ind;
int ind;
int next_ind;
int nreq;
int i;
void *wqe;
void *prev_wqe;
pthread_spin_lock(&srq->lock);
first_ind = srq->first_free;
for (nreq = 0; wr; wr = wr->next) {
ind = srq->first_free;
wqe = get_wqe(srq, ind);
next_ind = *wqe_to_link(wqe);
if (next_ind < 0) {
err = -1;
*bad_wr = wr;
break;
}
prev_wqe = srq->last;
srq->last = wqe;
((struct mthca_next_seg *) wqe)->ee_nds = 0;
/* flags field will always remain 0 */
wqe += sizeof (struct mthca_next_seg);
if (wr->num_sge > srq->max_gs) {
err = -1;
*bad_wr = wr;
srq->last = prev_wqe;
break;
}
for (i = 0; i < wr->num_sge; ++i) {
((struct mthca_data_seg *) wqe)->byte_count =
htonl(wr->sg_list[i].length);
((struct mthca_data_seg *) wqe)->lkey =
htonl(wr->sg_list[i].lkey);
((struct mthca_data_seg *) wqe)->addr =
htonll(wr->sg_list[i].addr);
wqe += sizeof (struct mthca_data_seg);
}
if (i < srq->max_gs) {
((struct mthca_data_seg *) wqe)->byte_count = 0;
((struct mthca_data_seg *) wqe)->lkey = htonl(MTHCA_INVAL_LKEY);
((struct mthca_data_seg *) wqe)->addr = 0;
}
((struct mthca_next_seg *) prev_wqe)->ee_nds =
htonl(MTHCA_NEXT_DBD);
srq->wrid[ind] = wr->wr_id;
srq->first_free = next_ind;
if (++nreq == MTHCA_TAVOR_MAX_WQES_PER_RECV_DB) {
nreq = 0;
doorbell[0] = htonl(first_ind << srq->wqe_shift);
doorbell[1] = htonl(srq->srqn << 8);
/*
* Make sure that descriptors are written
* before doorbell is rung.
*/
wmb();
mthca_write64(doorbell, to_mctx(ibsrq->context), MTHCA_RECV_DOORBELL);
first_ind = srq->first_free;
}
}
if (nreq) {
doorbell[0] = htonl(first_ind << srq->wqe_shift);
doorbell[1] = htonl((srq->srqn << 8) | nreq);
/*
* Make sure that descriptors are written before
* doorbell is rung.
*/
wmb();
mthca_write64(doorbell, to_mctx(ibsrq->context), MTHCA_RECV_DOORBELL);
}
pthread_spin_unlock(&srq->lock);
return err;
}
int mthca_arbel_post_srq_recv(struct ibv_srq *ibsrq,
struct ibv_recv_wr *wr,
struct ibv_recv_wr **bad_wr)
{
struct mthca_srq *srq = to_msrq(ibsrq);
int err = 0;
int ind;
int next_ind;
int nreq;
int i;
void *wqe;
pthread_spin_lock(&srq->lock);
for (nreq = 0; wr; ++nreq, wr = wr->next) {
ind = srq->first_free;
wqe = get_wqe(srq, ind);
next_ind = *wqe_to_link(wqe);
if (next_ind < 0) {
err = -1;
*bad_wr = wr;
break;
}
((struct mthca_next_seg *) wqe)->ee_nds = 0;
/* flags field will always remain 0 */
wqe += sizeof (struct mthca_next_seg);
if (wr->num_sge > srq->max_gs) {
err = -1;
*bad_wr = wr;
break;
}
for (i = 0; i < wr->num_sge; ++i) {
((struct mthca_data_seg *) wqe)->byte_count =
htonl(wr->sg_list[i].length);
((struct mthca_data_seg *) wqe)->lkey =
htonl(wr->sg_list[i].lkey);
((struct mthca_data_seg *) wqe)->addr =
htonll(wr->sg_list[i].addr);
wqe += sizeof (struct mthca_data_seg);
}
if (i < srq->max_gs) {
((struct mthca_data_seg *) wqe)->byte_count = 0;
((struct mthca_data_seg *) wqe)->lkey = htonl(MTHCA_INVAL_LKEY);
((struct mthca_data_seg *) wqe)->addr = 0;
}
srq->wrid[ind] = wr->wr_id;
srq->first_free = next_ind;
}
if (nreq) {
srq->counter += nreq;
/*
* Make sure that descriptors are written before
* we write doorbell record.
*/
wmb();
*srq->db = htonl(srq->counter);
}
pthread_spin_unlock(&srq->lock);
return err;
}
int mlx4_post_srq_recv(struct ibv_srq *ibsrq,
struct ibv_recv_wr *wr,
struct ibv_recv_wr **bad_wr)
{
struct mlx4_srq *srq = to_msrq(ibsrq);
struct mlx4_wqe_srq_next_seg *next;
struct mlx4_wqe_data_seg *scat;
int err = 0;
int nreq;
int i;
pthread_spin_lock(&srq->lock);
for (nreq = 0; wr; ++nreq, wr = wr->next) {
if (wr->num_sge > srq->max_gs) {
err = -1;
*bad_wr = wr;
break;
}
if (srq->head == srq->tail) {
/* SRQ is full*/
err = -1;
*bad_wr = wr;
break;
}
srq->wrid[srq->head] = wr->wr_id;
next = get_wqe(srq, srq->head);
srq->head = be16toh(next->next_wqe_index);
scat = (struct mlx4_wqe_data_seg *) (next + 1);
for (i = 0; i < wr->num_sge; ++i) {
scat[i].byte_count = htobe32(wr->sg_list[i].length);
scat[i].lkey = htobe32(wr->sg_list[i].lkey);
scat[i].addr = htobe64(wr->sg_list[i].addr);
}
if (i < srq->max_gs) {
scat[i].byte_count = 0;
scat[i].lkey = htobe32(MLX4_INVALID_LKEY);
scat[i].addr = 0;
}
}
if (nreq) {
srq->counter += nreq;
/*
* Make sure that descriptors are written before
* we write doorbell record.
*/
udma_to_device_barrier();
*srq->db = htobe32(srq->counter);
}
pthread_spin_unlock(&srq->lock);
return err;
}
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;
struct mlx4_ib_dev *mdev = to_mdev(ibsrq->device);
spin_lock_irqsave(&srq->lock, flags);
if (mdev->dev->persist->state & MLX4_DEVICE_STATE_INTERNAL_ERROR) {
err = -EIO;
*bad_wr = wr;
nreq = 0;
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 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);
}
out:
spin_unlock_irqrestore(&srq->lock, flags);
return err;
}
