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Target/iser: Fix initiator_depth and responder_resources 

The iser target is the RDMA requester and the iser initiator is the
RDMA responder. In order to determine the max inflight RDMA READ requests
to set on the QP (initiator_depth), it should take the min between the
initiator published initiator_depth and the max inflight rdma read
requests its local HCA support (max_qp_init_rd_atom).

The target will never handle incoming RDMA READ requests so no need to
set responder_resources.

Signed-off-by: Sagi Grimberg <sagig@mellanox.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
This commit is contained in:
Sagi Grimberg 2014-06-19 13:54:19 +03:00 committed by Nicholas Bellinger
parent 38a8316b5d
commit 1a92e17e39
1 changed files with 6 additions and 5 deletions
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11
drivers/infiniband/ulp/isert/ib_isert.c
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@ -592,10 +592,6 @@ isert_connect_request(struct rdma_cm_id *cma_id, struct rdma_cm_event *event)
cma_id->context = isert_conn;
isert_conn->conn_cm_id = cma_id;
isert_conn->responder_resources = event->param.conn.responder_resources;
isert_conn->initiator_depth = event->param.conn.initiator_depth;
pr_debug("Using responder_resources: %u initiator_depth: %u\n",
isert_conn->responder_resources, isert_conn->initiator_depth);
isert_conn->login_buf = kzalloc(ISCSI_DEF_MAX_RECV_SEG_LEN +
ISER_RX_LOGIN_SIZE, GFP_KERNEL);
@ -642,6 +638,12 @@ isert_connect_request(struct rdma_cm_id *cma_id, struct rdma_cm_event *event)
goto out_rsp_dma_map;
}
/* Set max inflight RDMA READ requests */
isert_conn->initiator_depth = min_t(u8,
event->param.conn.initiator_depth,
device->dev_attr.max_qp_init_rd_atom);
pr_debug("Using initiator_depth: %u\n", isert_conn->initiator_depth);
isert_conn->conn_device = device;
isert_conn->conn_pd = ib_alloc_pd(isert_conn->conn_device->ib_device);
if (IS_ERR(isert_conn->conn_pd)) {
@ -3067,7 +3069,6 @@ isert_rdma_accept(struct isert_conn *isert_conn)
int ret;
memset(&cp, 0, sizeof(struct rdma_conn_param));
cp.responder_resources = isert_conn->responder_resources;
cp.initiator_depth = isert_conn->initiator_depth;
cp.retry_count = 7;
cp.rnr_retry_count = 7;