qed: iWARP CM add error handling

This patch introduces error handling for errors that occurred during
connection establishment.

Signed-off-by: Michal Kalderon <Michal.Kalderon@cavium.com>
Signed-off-by: Yuval Mintz <Yuval.Mintz@cavium.com>
Signed-off-by: Ariel Elior <Ariel.Elior@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/qlogic/qed/qed_iwarp.c b/drivers/net/ethernet/qlogic/qed/qed_iwarp.c
index 84bcda3..5cd20da 100644 (file)
--- a/drivers/net/ethernet/qlogic/qed/qed_iwarp.c
+++ b/drivers/net/ethernet/qlogic/qed/qed_iwarp.c
@@ -1001,12 +1001,75 @@ qed_iwarp_mpa_complete(struct qed_hwfn *p_hwfn,
                ep->state = QED_IWARP_EP_ESTABLISHED;
                params.status = 0;
                break;
+       case IWARP_CONN_ERROR_MPA_TIMEOUT:
+               DP_NOTICE(p_hwfn, "%s(0x%x) MPA timeout\n",
+                         QED_IWARP_CONNECT_MODE_STRING(ep), ep->cid);
+               params.status = -EBUSY;
+               break;
+       case IWARP_CONN_ERROR_MPA_ERROR_REJECT:
+               DP_NOTICE(p_hwfn, "%s(0x%x) MPA Reject\n",
+                         QED_IWARP_CONNECT_MODE_STRING(ep), ep->cid);
+               params.status = -ECONNREFUSED;
+               break;
+       case IWARP_CONN_ERROR_MPA_RST:
+               DP_NOTICE(p_hwfn, "%s(0x%x) MPA reset(tcp cid: 0x%x)\n",
+                         QED_IWARP_CONNECT_MODE_STRING(ep), ep->cid,
+                         ep->tcp_cid);
+               params.status = -ECONNRESET;
+               break;
+       case IWARP_CONN_ERROR_MPA_FIN:
+               DP_NOTICE(p_hwfn, "%s(0x%x) MPA received FIN\n",
+                         QED_IWARP_CONNECT_MODE_STRING(ep), ep->cid);
+               params.status = -ECONNREFUSED;
+               break;
+       case IWARP_CONN_ERROR_MPA_INSUF_IRD:
+               DP_NOTICE(p_hwfn, "%s(0x%x) MPA insufficient ird\n",
+                         QED_IWARP_CONNECT_MODE_STRING(ep), ep->cid);
+               params.status = -ECONNREFUSED;
+               break;
+       case IWARP_CONN_ERROR_MPA_RTR_MISMATCH:
+               DP_NOTICE(p_hwfn, "%s(0x%x) MPA RTR MISMATCH\n",
+                         QED_IWARP_CONNECT_MODE_STRING(ep), ep->cid);
+               params.status = -ECONNREFUSED;
+               break;
+       case IWARP_CONN_ERROR_MPA_INVALID_PACKET:
+               DP_NOTICE(p_hwfn, "%s(0x%x) MPA Invalid Packet\n",
+                         QED_IWARP_CONNECT_MODE_STRING(ep), ep->cid);
+               params.status = -ECONNREFUSED;
+               break;
+       case IWARP_CONN_ERROR_MPA_LOCAL_ERROR:
+               DP_NOTICE(p_hwfn, "%s(0x%x) MPA Local Error\n",
+                         QED_IWARP_CONNECT_MODE_STRING(ep), ep->cid);
+               params.status = -ECONNREFUSED;
+               break;
+       case IWARP_CONN_ERROR_MPA_TERMINATE:
+               DP_NOTICE(p_hwfn, "%s(0x%x) MPA TERMINATE\n",
+                         QED_IWARP_CONNECT_MODE_STRING(ep), ep->cid);
+               params.status = -ECONNREFUSED;
+               break;
        default:
                params.status = -ECONNRESET;
                break;
        }
 
        ep->event_cb(ep->cb_context, &params);
+
+       /* on passive side, if there is no associated QP (REJECT) we need to
+        * return the ep to the pool, (in the regular case we add an element
+        * in accept instead of this one.
+        * In both cases we need to remove it from the ep_list.
+        */
+       if (fw_return_code != RDMA_RETURN_OK) {
+               ep->tcp_cid = QED_IWARP_INVALID_TCP_CID;
+               if ((ep->connect_mode == TCP_CONNECT_PASSIVE) &&
+                   (!ep->qp)) {        /* Rejected */
+                       qed_iwarp_return_ep(p_hwfn, ep);
+               } else {
+                       spin_lock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
+                       list_del(&ep->list_entry);
+                       spin_unlock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
+               }
+       }
 }
 
 static void
@@ -2011,6 +2074,42 @@ void qed_iwarp_exception_received(struct qed_hwfn *p_hwfn,
                params.event = QED_IWARP_EVENT_DISCONNECT;
                event_cb = true;
                break;
+       case IWARP_EXCEPTION_DETECTED_RQ_EMPTY:
+               params.event = QED_IWARP_EVENT_RQ_EMPTY;
+               event_cb = true;
+               break;
+       case IWARP_EXCEPTION_DETECTED_IRQ_FULL:
+               params.event = QED_IWARP_EVENT_IRQ_FULL;
+               event_cb = true;
+               break;
+       case IWARP_EXCEPTION_DETECTED_LLP_TIMEOUT:
+               params.event = QED_IWARP_EVENT_LLP_TIMEOUT;
+               event_cb = true;
+               break;
+       case IWARP_EXCEPTION_DETECTED_REMOTE_PROTECTION_ERROR:
+               params.event = QED_IWARP_EVENT_REMOTE_PROTECTION_ERROR;
+               event_cb = true;
+               break;
+       case IWARP_EXCEPTION_DETECTED_CQ_OVERFLOW:
+               params.event = QED_IWARP_EVENT_CQ_OVERFLOW;
+               event_cb = true;
+               break;
+       case IWARP_EXCEPTION_DETECTED_LOCAL_CATASTROPHIC:
+               params.event = QED_IWARP_EVENT_QP_CATASTROPHIC;
+               event_cb = true;
+               break;
+       case IWARP_EXCEPTION_DETECTED_LOCAL_ACCESS_ERROR:
+               params.event = QED_IWARP_EVENT_LOCAL_ACCESS_ERROR;
+               event_cb = true;
+               break;
+       case IWARP_EXCEPTION_DETECTED_REMOTE_OPERATION_ERROR:
+               params.event = QED_IWARP_EVENT_REMOTE_OPERATION_ERROR;
+               event_cb = true;
+               break;
+       case IWARP_EXCEPTION_DETECTED_TERMINATE_RECEIVED:
+               params.event = QED_IWARP_EVENT_TERMINATE_RECEIVED;
+               event_cb = true;
+               break;
        default:
                DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
                           "Unhandled exception received...fw_ret_code=%d\n",
@@ -2025,6 +2124,66 @@ void qed_iwarp_exception_received(struct qed_hwfn *p_hwfn,
        }
 }
 
+static void
+qed_iwarp_tcp_connect_unsuccessful(struct qed_hwfn *p_hwfn,
+                                  struct qed_iwarp_ep *ep, u8 fw_return_code)
+{
+       struct qed_iwarp_cm_event_params params;
+
+       memset(&params, 0, sizeof(params));
+       params.event = QED_IWARP_EVENT_ACTIVE_COMPLETE;
+       params.ep_context = ep;
+       params.cm_info = &ep->cm_info;
+       ep->state = QED_IWARP_EP_CLOSED;
+
+       switch (fw_return_code) {
+       case IWARP_CONN_ERROR_TCP_CONNECT_INVALID_PACKET:
+               DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
+                          "%s(0x%x) TCP connect got invalid packet\n",
+                          QED_IWARP_CONNECT_MODE_STRING(ep), ep->tcp_cid);
+               params.status = -ECONNRESET;
+               break;
+       case IWARP_CONN_ERROR_TCP_CONNECTION_RST:
+               DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
+                          "%s(0x%x) TCP Connection Reset\n",
+                          QED_IWARP_CONNECT_MODE_STRING(ep), ep->tcp_cid);
+               params.status = -ECONNRESET;
+               break;
+       case IWARP_CONN_ERROR_TCP_CONNECT_TIMEOUT:
+               DP_NOTICE(p_hwfn, "%s(0x%x) TCP timeout\n",
+                         QED_IWARP_CONNECT_MODE_STRING(ep), ep->tcp_cid);
+               params.status = -EBUSY;
+               break;
+       case IWARP_CONN_ERROR_MPA_NOT_SUPPORTED_VER:
+               DP_NOTICE(p_hwfn, "%s(0x%x) MPA not supported VER\n",
+                         QED_IWARP_CONNECT_MODE_STRING(ep), ep->tcp_cid);
+               params.status = -ECONNREFUSED;
+               break;
+       case IWARP_CONN_ERROR_MPA_INVALID_PACKET:
+               DP_NOTICE(p_hwfn, "%s(0x%x) MPA Invalid Packet\n",
+                         QED_IWARP_CONNECT_MODE_STRING(ep), ep->tcp_cid);
+               params.status = -ECONNRESET;
+               break;
+       default:
+               DP_ERR(p_hwfn,
+                      "%s(0x%x) Unexpected return code tcp connect: %d\n",
+                      QED_IWARP_CONNECT_MODE_STRING(ep),
+                      ep->tcp_cid, fw_return_code);
+               params.status = -ECONNRESET;
+               break;
+       }
+
+       if (ep->connect_mode == TCP_CONNECT_PASSIVE) {
+               ep->tcp_cid = QED_IWARP_INVALID_TCP_CID;
+               qed_iwarp_return_ep(p_hwfn, ep);
+       } else {
+               ep->event_cb(ep->cb_context, &params);
+               spin_lock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
+               list_del(&ep->list_entry);
+               spin_unlock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
+       }
+}
+
 void
 qed_iwarp_connect_complete(struct qed_hwfn *p_hwfn,
                           struct qed_iwarp_ep *ep, u8 fw_return_code)
@@ -2038,9 +2197,17 @@ qed_iwarp_connect_complete(struct qed_hwfn *p_hwfn,
                ep->syn = NULL;
 
                /* If connect failed - upper layer doesn't know about it */
-               qed_iwarp_mpa_received(p_hwfn, ep);
+               if (fw_return_code == RDMA_RETURN_OK)
+                       qed_iwarp_mpa_received(p_hwfn, ep);
+               else
+                       qed_iwarp_tcp_connect_unsuccessful(p_hwfn, ep,
+                                                          fw_return_code);
        } else {
-               qed_iwarp_mpa_offload(p_hwfn, ep);
+               if (fw_return_code == RDMA_RETURN_OK)
+                       qed_iwarp_mpa_offload(p_hwfn, ep);
+               else
+                       qed_iwarp_tcp_connect_unsuccessful(p_hwfn, ep,
+                                                          fw_return_code);
        }
 }
 
@@ -2123,6 +2290,18 @@ static int qed_iwarp_async_event(struct qed_hwfn *p_hwfn,
                qed_iwarp_cid_cleaned(p_hwfn, cid);
 
                break;
+       case IWARP_EVENT_TYPE_ASYNC_CQ_OVERFLOW:
+               DP_NOTICE(p_hwfn, "IWARP_EVENT_TYPE_ASYNC_CQ_OVERFLOW\n");
+
+               p_hwfn->p_rdma_info->events.affiliated_event(
+                       p_hwfn->p_rdma_info->events.context,
+                       QED_IWARP_EVENT_CQ_OVERFLOW,
+                       (void *)fw_handle);
+               break;
+       default:
+               DP_ERR(p_hwfn, "Received unexpected async iwarp event %d\n",
+                      fw_event_code);
+               return -EINVAL;
        }
        return 0;
 }

diff --git a/include/linux/qed/qed_rdma_if.h b/include/linux/qed/qed_rdma_if.h
index 01966c3..4dd72ba 100644 (file)
--- a/include/linux/qed/qed_rdma_if.h
+++ b/include/linux/qed/qed_rdma_if.h
@@ -476,7 +476,16 @@ enum qed_iwarp_event_type {
        QED_IWARP_EVENT_ACTIVE_COMPLETE,  /* Active side reply received */
        QED_IWARP_EVENT_DISCONNECT,
        QED_IWARP_EVENT_CLOSE,
+       QED_IWARP_EVENT_IRQ_FULL,
+       QED_IWARP_EVENT_RQ_EMPTY,
+       QED_IWARP_EVENT_LLP_TIMEOUT,
+       QED_IWARP_EVENT_REMOTE_PROTECTION_ERROR,
+       QED_IWARP_EVENT_CQ_OVERFLOW,
+       QED_IWARP_EVENT_QP_CATASTROPHIC,
        QED_IWARP_EVENT_ACTIVE_MPA_REPLY,
+       QED_IWARP_EVENT_LOCAL_ACCESS_ERROR,
+       QED_IWARP_EVENT_REMOTE_OPERATION_ERROR,
+       QED_IWARP_EVENT_TERMINATE_RECEIVED
 };
 
 enum qed_tcp_ip_version {