diff options
| author | Or Gerlitz <ogerlitz@voltaire.com> | 2010-02-08 13:22:34 +0000 |
|---|---|---|
| committer | Roland Dreier <rolandd@cisco.com> | 2010-02-24 09:41:14 -0800 |
| commit | 962b4b528ba87c8d837bb04794a1918c7de631cd (patch) | |
| tree | 29b88d375f01c1628ca1f73612cb941ea52420ae /drivers/infiniband/ulp | |
| parent | aae3c995ff74a183d15207436d383942485b2edd (diff) | |
| download | linux-962b4b528ba87c8d837bb04794a1918c7de631cd.tar.gz | |
IB/iser: Use libiscsi passthrough mode
libiscsi passthrough mode invokes the transport xmit calls directly
without first going through an internal queue, unlike the other mode,
which uses a queue and a xmitworker thread. Now that the "cant_sleep"
prerequisite of iscsi_host_alloc is met, move to use it. Handling
xmit errors is now done by the passthrough flow of libiscsi. Since
the queue/worker aren't used in this mode, the code that schedules the
xmitworker is removed.
Signed-off-by: Or Gerlitz <ogerlitz@voltaire.com>
Reviewed-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
Diffstat (limited to 'drivers/infiniband/ulp')
| -rw-r--r-- | drivers/infiniband/ulp/iser/iscsi_iser.c | 11 | ||||
| -rw-r--r-- | drivers/infiniband/ulp/iser/iser_initiator.c | 12 |
2 files changed, 3 insertions, 20 deletions
diff --git a/drivers/infiniband/ulp/iser/iscsi_iser.c b/drivers/infiniband/ulp/iser/iscsi_iser.c index 331147b71a91..71237f8f78f7 100644 --- a/drivers/infiniband/ulp/iser/iscsi_iser.c +++ b/drivers/infiniband/ulp/iser/iscsi_iser.c @@ -190,7 +190,7 @@ iscsi_iser_mtask_xmit(struct iscsi_conn *conn, struct iscsi_task *task) { int error = 0; - iser_dbg("task deq [cid %d itt 0x%x]\n", conn->id, task->itt); + iser_dbg("mtask xmit [cid %d itt 0x%x]\n", conn->id, task->itt); error = iser_send_control(conn, task); @@ -200,9 +200,6 @@ iscsi_iser_mtask_xmit(struct iscsi_conn *conn, struct iscsi_task *task) * - if yes, the task is recycled at iscsi_complete_pdu * - if no, the task is recycled at iser_snd_completion */ - if (error && error != -ENOBUFS) - iscsi_conn_failure(conn, ISCSI_ERR_CONN_FAILED); - return error; } @@ -254,7 +251,7 @@ iscsi_iser_task_xmit(struct iscsi_task *task) task->imm_count, task->unsol_r2t.data_length); } - iser_dbg("task deq [cid %d itt 0x%x]\n", + iser_dbg("ctask xmit [cid %d itt 0x%x]\n", conn->id, task->itt); /* Send the cmd PDU */ @@ -270,8 +267,6 @@ iscsi_iser_task_xmit(struct iscsi_task *task) error = iscsi_iser_task_xmit_unsol_data(conn, task); iscsi_iser_task_xmit_exit: - if (error && error != -ENOBUFS) - iscsi_conn_failure(conn, ISCSI_ERR_CONN_FAILED); return error; } @@ -423,7 +418,7 @@ iscsi_iser_session_create(struct iscsi_endpoint *ep, struct Scsi_Host *shost; struct iser_conn *ib_conn; - shost = iscsi_host_alloc(&iscsi_iser_sht, 0, 1); + shost = iscsi_host_alloc(&iscsi_iser_sht, 0, 0); if (!shost) return NULL; shost->transportt = iscsi_iser_scsi_transport; diff --git a/drivers/infiniband/ulp/iser/iser_initiator.c b/drivers/infiniband/ulp/iser/iser_initiator.c index 27450eebd1e4..f447ace89cb1 100644 --- a/drivers/infiniband/ulp/iser/iser_initiator.c +++ b/drivers/infiniband/ulp/iser/iser_initiator.c @@ -514,10 +514,7 @@ void iser_rcv_completion(struct iser_rx_desc *rx_desc, void iser_snd_completion(struct iser_tx_desc *tx_desc, struct iser_conn *ib_conn) { - struct iscsi_iser_conn *iser_conn = ib_conn->iser_conn; - struct iscsi_conn *conn = iser_conn->iscsi_conn; struct iscsi_task *task; - int resume_tx = 0; struct iser_device *device = ib_conn->device; if (tx_desc->type == ISCSI_TX_DATAOUT) { @@ -526,17 +523,8 @@ void iser_snd_completion(struct iser_tx_desc *tx_desc, kmem_cache_free(ig.desc_cache, tx_desc); } - if (atomic_read(&iser_conn->ib_conn->post_send_buf_count) == - ISER_QP_MAX_REQ_DTOS) - resume_tx = 1; - atomic_dec(&ib_conn->post_send_buf_count); - if (resume_tx) { - iser_dbg("%ld resuming tx\n",jiffies); - iscsi_conn_queue_work(conn); - } - if (tx_desc->type == ISCSI_TX_CONTROL) { /* this arithmetic is legal by libiscsi dd_data allocation */ task = (void *) ((long)(void *)tx_desc - |