Patch can be applied separately from patch to mthca, but requires other patch to work properly.
- Sean
Index: mad.c
===================================================================
--- mad.c (revision 1209)
+++ mad.c (working copy)
@@ -90,6 +90,8 @@
struct ib_mad_send_wc *mad_send_wc);
static void timeout_sends(void *data);
static int solicited_mad(struct ib_mad *mad);
+static int ib_mad_change_qp_state_to_rts(struct ib_qp *qp,
+ enum ib_qp_state cur_state); /*
* Returns a ib_mad_port_private structure or NULL for a device/port.
@@ -591,6 +593,7 @@
/* Timeout will be updated after send completes */
mad_send_wr->timeout = msecs_to_jiffies(send_wr->wr.
ud.timeout_ms);
+ mad_send_wr->retry = 0;
/* One reference for each work request to QP + response */
mad_send_wr->refcount = 1 + (mad_send_wr->timeout > 0);
mad_send_wr->status = IB_WC_SUCCESS;
@@ -1339,6 +1342,70 @@
}
}+static void mark_sends_for_retry(struct ib_mad_qp_info *qp_info)
+{
+ struct ib_mad_send_wr_private *mad_send_wr;
+ struct ib_mad_list_head *mad_list;
+ int flags;
+
+ spin_lock_irqsave(&qp_info->send_queue.lock, flags);
+ list_for_each_entry(mad_list, &qp_info->send_queue.list, list) {
+ mad_send_wr = container_of(mad_list,
+ struct ib_mad_send_wr_private,
+ mad_list);
+ mad_send_wr->retry = 1;
+ }
+ spin_unlock_irqrestore(&qp_info->send_queue.lock, flags);
+}
+
+static void mad_error_handler(struct ib_mad_port_private *port_priv,
+ struct ib_wc *wc)
+{
+ struct ib_mad_list_head *mad_list;
+ struct ib_mad_qp_info *qp_info;
+ struct ib_mad_send_wr_private *mad_send_wr;
+ int ret;
+
+ /* Determine if failure was a send or receive */
+ mad_list = (struct ib_mad_list_head *)(unsigned long)wc->wr_id;
+ qp_info = mad_list->mad_queue->qp_info;
+ if (mad_list->mad_queue == &qp_info->recv_queue) {
+ /*
+ * Receive errors indicate that the QP has entered the error
+ * state - error handling/shutdown code will cleanup.
+ */
+ return;
+ }
+
+ /*
+ * Send errors will transition the QP to SQE - move
+ * QP to RTS and repost flushed work requests.
+ */
+ mad_send_wr = container_of(mad_list, struct ib_mad_send_wr_private,
+ mad_list);
+ if (wc->status == IB_WC_WR_FLUSH_ERR) {
+ if (mad_send_wr->retry) {
+ /* Repost send. */
+ struct ib_send_wr *bad_send_wr;
+
+ mad_send_wr->retry = 0;
+ ret = ib_post_send(qp_info->qp, &mad_send_wr->send_wr,
+ &bad_send_wr);
+ if (ret)
+ ib_mad_send_done_handler(port_priv, wc);
+ } else
+ ib_mad_send_done_handler(port_priv, wc);
+ } else {
+ /* Transition QP to RTS and fail offending send. */
+ ret = ib_mad_change_qp_state_to_rts(qp_info->qp, IB_QPS_SQE);
+ if (ret)
+ printk(KERN_ERR PFX "mad_error_handler - unable to "
+ "transition QP to RTS : %d\n", ret);
+ ib_mad_send_done_handler(port_priv, wc);
+ mark_sends_for_retry(qp_info);
+ }
+}
+
/*
* IB MAD completion callback
*/
@@ -1346,34 +1413,25 @@
{
struct ib_mad_port_private *port_priv;
struct ib_wc wc;
- struct ib_mad_list_head *mad_list;
- struct ib_mad_qp_info *qp_info; port_priv = (struct ib_mad_port_private*)data;
ib_req_notify_cq(port_priv->cq, IB_CQ_NEXT_COMP);
while (ib_poll_cq(port_priv->cq, 1, &wc) == 1) {
- if (wc.status != IB_WC_SUCCESS) {
- /* Determine if failure was a send or receive */
- mad_list = (struct ib_mad_list_head *)
- (unsigned long)wc.wr_id;
- qp_info = mad_list->mad_queue->qp_info;
- if (mad_list->mad_queue == &qp_info->send_queue)
- wc.opcode = IB_WC_SEND;
- else
- wc.opcode = IB_WC_RECV;
- }
- switch (wc.opcode) {
- case IB_WC_SEND:
- ib_mad_send_done_handler(port_priv, &wc);
- break;
- case IB_WC_RECV:
- ib_mad_recv_done_handler(port_priv, &wc);
- break;
- default:
- BUG_ON(1);
- break;
- }
+ if (wc.status == IB_WC_SUCCESS) {
+ switch (wc.opcode) {
+ case IB_WC_SEND:
+ ib_mad_send_done_handler(port_priv, &wc);
+ break;
+ case IB_WC_RECV:
+ ib_mad_recv_done_handler(port_priv, &wc);
+ break;
+ default:
+ BUG_ON(1);
+ break;
+ }
+ } else
+ mad_error_handler(port_priv, &wc);
}
}@@ -1717,7 +1775,8 @@
/*
* Modify QP into Ready-To-Send state
*/
-static inline int ib_mad_change_qp_state_to_rts(struct ib_qp *qp)
+static int ib_mad_change_qp_state_to_rts(struct ib_qp *qp,
+ enum ib_qp_state cur_state)
{
int ret;
struct ib_qp_attr *attr;
@@ -1729,11 +1788,12 @@
"ib_qp_attr\n");
return -ENOMEM;
}
-
attr->qp_state = IB_QPS_RTS;
- attr->sq_psn = IB_MAD_SEND_Q_PSN;
- attr_mask = IB_QP_STATE | IB_QP_SQ_PSN;
-
+ attr_mask = IB_QP_STATE;
+ if (cur_state == IB_QPS_RTR) {
+ attr->sq_psn = IB_MAD_SEND_Q_PSN;
+ attr_mask |= IB_QP_SQ_PSN;
+ }
ret = ib_modify_qp(qp, attr, attr_mask);
kfree(attr);@@ -1793,7 +1853,8 @@
goto error;
}- ret = ib_mad_change_qp_state_to_rts(port_priv->qp_info[i].qp);
+ ret = ib_mad_change_qp_state_to_rts(port_priv->qp_info[i].qp,
+ IB_QPS_RTR);
if (ret) {
printk(KERN_ERR PFX "Couldn't change QP%d state to "
"RTS\n", i);
@@ -1852,6 +1913,15 @@
}
}+static void qp_event_handler(struct ib_event *event, void *qp_context)
+{
+ struct ib_mad_qp_info *qp_info = qp_context;
+
+ /* It's worse than that! He's dead, Jim! */
+ printk(KERN_ERR PFX "Fatal error (%d) on MAD QP (%d)\n",
+ event->event, qp_info->qp->qp_num);
+}
+
static void init_mad_queue(struct ib_mad_qp_info *qp_info,
struct ib_mad_queue *mad_queue)
{
@@ -1884,6 +1954,8 @@
qp_init_attr.cap.max_recv_sge = IB_MAD_RECV_REQ_MAX_SG;
qp_init_attr.qp_type = qp_type;
qp_init_attr.port_num = port_priv->port_num;
+ qp_init_attr.qp_context = qp_info;
+ qp_init_attr.event_handler = qp_event_handler;
qp_info->qp = ib_create_qp(port_priv->pd, &qp_init_attr);
if (IS_ERR(qp_info->qp)) {
printk(KERN_ERR PFX "Couldn't create ib_mad QP%d\n",
Index: mad_priv.h
===================================================================
--- mad_priv.h (revision 1209)
+++ mad_priv.h (working copy)
@@ -127,6 +127,7 @@
u64 wr_id; /* client WR ID */
u64 tid;
unsigned long timeout;
+ int retry;
int refcount;
enum ib_wc_status status;
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