diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/infiniband/core/cm.c | 51 |
1 files changed, 31 insertions, 20 deletions
diff --git a/drivers/infiniband/core/cm.c b/drivers/infiniband/core/cm.c index 07fb8d3c037f..99246e49dd3a 100644 --- a/drivers/infiniband/core/cm.c +++ b/drivers/infiniband/core/cm.c @@ -35,6 +35,8 @@ MODULE_DESCRIPTION("InfiniBand CM"); MODULE_LICENSE("Dual BSD/GPL"); #define CM_DESTROY_ID_WAIT_TIMEOUT 10000 /* msecs */ +#define CM_DIRECT_RETRY_CTX ((void *) 1UL) + static const char * const ibcm_rej_reason_strs[] = { [IB_CM_REJ_NO_QP] = "no QP", [IB_CM_REJ_NO_EEC] = "no EEC", @@ -358,13 +360,20 @@ static void cm_free_priv_msg(struct ib_mad_send_buf *msg) ib_free_send_mad(msg); } -static struct ib_mad_send_buf *cm_alloc_response_msg_no_ah(struct cm_port *port, - struct ib_mad_recv_wc *mad_recv_wc) +static struct ib_mad_send_buf * +cm_alloc_response_msg_no_ah(struct cm_port *port, + struct ib_mad_recv_wc *mad_recv_wc, + bool direct_retry) { - return ib_create_send_mad(port->mad_agent, 1, mad_recv_wc->wc->pkey_index, - 0, IB_MGMT_MAD_HDR, IB_MGMT_MAD_DATA, - GFP_ATOMIC, - IB_MGMT_BASE_VERSION); + struct ib_mad_send_buf *m; + + m = ib_create_send_mad(port->mad_agent, 1, mad_recv_wc->wc->pkey_index, + 0, IB_MGMT_MAD_HDR, IB_MGMT_MAD_DATA, + GFP_ATOMIC, IB_MGMT_BASE_VERSION); + if (!IS_ERR(m)) + m->context[0] = direct_retry ? CM_DIRECT_RETRY_CTX : NULL; + + return m; } static int cm_create_response_msg_ah(struct cm_port *port, @@ -384,12 +393,13 @@ static int cm_create_response_msg_ah(struct cm_port *port, static int cm_alloc_response_msg(struct cm_port *port, struct ib_mad_recv_wc *mad_recv_wc, + bool direct_retry, struct ib_mad_send_buf **msg) { struct ib_mad_send_buf *m; int ret; - m = cm_alloc_response_msg_no_ah(port, mad_recv_wc); + m = cm_alloc_response_msg_no_ah(port, mad_recv_wc, direct_retry); if (IS_ERR(m)) return PTR_ERR(m); @@ -1598,7 +1608,7 @@ static int cm_issue_rej(struct cm_port *port, struct cm_rej_msg *rej_msg, *rcv_msg; int ret; - ret = cm_alloc_response_msg(port, mad_recv_wc, &msg); + ret = cm_alloc_response_msg(port, mad_recv_wc, false, &msg); if (ret) return ret; @@ -1951,7 +1961,7 @@ static void cm_dup_req_handler(struct cm_work *work, } spin_unlock_irq(&cm_id_priv->lock); - ret = cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg); + ret = cm_alloc_response_msg(work->port, work->mad_recv_wc, true, &msg); if (ret) return; @@ -2444,7 +2454,7 @@ static void cm_dup_rep_handler(struct cm_work *work) atomic_long_inc( &work->port->counters[CM_RECV_DUPLICATES][CM_REP_COUNTER]); - ret = cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg); + ret = cm_alloc_response_msg(work->port, work->mad_recv_wc, true, &msg); if (ret) goto deref; @@ -2791,7 +2801,7 @@ static int cm_issue_drep(struct cm_port *port, struct cm_drep_msg *drep_msg; int ret; - ret = cm_alloc_response_msg(port, mad_recv_wc, &msg); + ret = cm_alloc_response_msg(port, mad_recv_wc, true, &msg); if (ret) return ret; @@ -2856,7 +2866,8 @@ static int cm_dreq_handler(struct cm_work *work) case IB_CM_TIMEWAIT: atomic_long_inc(&work->port->counters[CM_RECV_DUPLICATES] [CM_DREQ_COUNTER]); - msg = cm_alloc_response_msg_no_ah(work->port, work->mad_recv_wc); + msg = cm_alloc_response_msg_no_ah(work->port, work->mad_recv_wc, + true); if (IS_ERR(msg)) goto unlock; @@ -3361,7 +3372,8 @@ static int cm_lap_handler(struct cm_work *work) case IB_CM_MRA_LAP_SENT: atomic_long_inc(&work->port->counters[CM_RECV_DUPLICATES] [CM_LAP_COUNTER]); - msg = cm_alloc_response_msg_no_ah(work->port, work->mad_recv_wc); + msg = cm_alloc_response_msg_no_ah(work->port, work->mad_recv_wc, + true); if (IS_ERR(msg)) goto unlock; @@ -3826,7 +3838,7 @@ static void cm_send_handler(struct ib_mad_agent *mad_agent, struct ib_mad_send_wc *mad_send_wc) { struct ib_mad_send_buf *msg = mad_send_wc->send_buf; - struct cm_id_private *cm_id_priv = msg->context[0]; + struct cm_id_private *cm_id_priv; enum ib_cm_state state = (enum ib_cm_state)(unsigned long)msg->context[1]; struct cm_port *port; @@ -3836,13 +3848,12 @@ static void cm_send_handler(struct ib_mad_agent *mad_agent, attr_index = be16_to_cpu(((struct ib_mad_hdr *) msg->mad)->attr_id) - CM_ATTR_ID_OFFSET; - /* - * If the send was in response to a received message (context[0] is not - * set to a cm_id), and is not a REJ, then it is a send that was - * manually retried. - */ - if (!cm_id_priv && (attr_index != CM_REJ_COUNTER)) + if (msg->context[0] == CM_DIRECT_RETRY_CTX) { msg->retries = 1; + cm_id_priv = NULL; + } else { + cm_id_priv = msg->context[0]; + } atomic_long_add(1 + msg->retries, &port->counters[CM_XMIT][attr_index]); if (msg->retries) |