diff options
| author |   Sagi Grimberg <sagig@mellanox.com> | 2015-08-06 18:33:06 +0300 |
|---|---|---|
| committer |   Doug Ledford <dledford@redhat.com> | 2015-08-30 18:12:33 -0400 |
| commit | 7332bed085c68fc76462583a1003c6dca2c31e11 (patch) | |
| tree | aa973831bf21d55bbe2ad999a215381ad3e36e45 /drivers/infiniband/ulp/iser/iser_verbs.c | |
| parent | IB/iser: Add debug prints to the various memory registration methods (diff) | |
| download | linux-dev-7332bed085c68fc76462583a1003c6dca2c31e11.tar.xz linux-dev-7332bed085c68fc76462583a1003c6dca2c31e11.zip | |
IB/iser: Chain all iser transaction send work requests
Chaning of send work requests benefits performance by
reducing the send queue lock contention (acquired in
ib_post_send) and saves us HW doorbells which is posted
only once.
Currently, in normal IO flows iser does not chain the CDB send
work request with the registration work request. Also in PI
flows, signature work requests are not chained as well.
Lets chain those and post only once.
Signed-off-by: Sagi Grimberg <sagig@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Diffstat (limited to 'drivers/infiniband/ulp/iser/iser_verbs.c')
| -rw-r--r-- | drivers/infiniband/ulp/iser/iser_verbs.c | 21 |
1 files changed, 11 insertions, 10 deletions
diff --git a/drivers/infiniband/ulp/iser/iser_verbs.c b/drivers/infiniband/ulp/iser/iser_verbs.c index 187c7125a4b9..6f5be47a6b90 100644 --- a/drivers/infiniband/ulp/iser/iser_verbs.c +++ b/drivers/infiniband/ulp/iser/iser_verbs.c @@ -1116,23 +1116,24 @@ int iser_post_recvm(struct iser_conn *iser_conn, int count) int iser_post_send(struct ib_conn *ib_conn, struct iser_tx_desc *tx_desc, bool signal) { - int ib_ret; - struct ib_send_wr send_wr, *send_wr_failed; + struct ib_send_wr *bad_wr, *wr = iser_tx_next_wr(tx_desc); + int ib_ret; ib_dma_sync_single_for_device(ib_conn->device->ib_device, tx_desc->dma_addr, ISER_HEADERS_LEN, DMA_TO_DEVICE); - send_wr.next = NULL; - send_wr.wr_id = (uintptr_t)tx_desc; - send_wr.sg_list = tx_desc->tx_sg; - send_wr.num_sge = tx_desc->num_sge; - send_wr.opcode = IB_WR_SEND; - send_wr.send_flags = signal ? IB_SEND_SIGNALED : 0; + wr->next = NULL; + wr->wr_id = (uintptr_t)tx_desc; + wr->sg_list = tx_desc->tx_sg; + wr->num_sge = tx_desc->num_sge; + wr->opcode = IB_WR_SEND; + wr->send_flags = signal ? IB_SEND_SIGNALED : 0; - ib_ret = ib_post_send(ib_conn->qp, &send_wr, &send_wr_failed); + ib_ret = ib_post_send(ib_conn->qp, &tx_desc->wrs[0], &bad_wr); if (ib_ret) - iser_err("ib_post_send failed, ret:%d\n", ib_ret); + iser_err("ib_post_send failed, ret:%d opcode:%d\n", + ib_ret, bad_wr->opcode); return ib_ret; } |