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IB/mad: Report number of times a mad was retried

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To allow ULPs to tune timeout values and capture retry statistics,
report the number of times that a mad send operation was retried.

For RMPP mads, report the total number of times that the any portion
(send window) of the send operation was retried.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
This commit is contained in:
Sean Hefty
2007-11-27 00:11:04 -08:00
committed by Roland Dreier
parent 547af76521
commit 4fc8cd4919
4 changed files with 13 additions and 5 deletions
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drivers/infiniband/core/mad.c
+7 -2
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@@ -1100,7 +1100,9 @@ int ib_post_send_mad(struct ib_mad_send_buf *send_buf,
mad_send_wr->tid = ((struct ib_mad_hdr *) send_buf->mad)->tid;
/* Timeout will be updated after send completes */
mad_send_wr->timeout = msecs_to_jiffies(send_buf->timeout_ms);
mad_send_wr->retries = send_buf->retries;
mad_send_wr->max_retries = send_buf->retries;
mad_send_wr->retries_left = send_buf->retries;
send_buf->retries = 0;
/* Reference for work request to QP + response */
mad_send_wr->refcount = 1 + (mad_send_wr->timeout > 0);
mad_send_wr->status = IB_WC_SUCCESS;
@@ -2436,9 +2438,12 @@ static int retry_send(struct ib_mad_send_wr_private *mad_send_wr)
{
int ret;
if (!mad_send_wr->retries--)
if (!mad_send_wr->retries_left)
return -ETIMEDOUT;
mad_send_wr->retries_left--;
mad_send_wr->send_buf.retries++;
mad_send_wr->timeout = msecs_to_jiffies(mad_send_wr->send_buf.timeout_ms);
if (mad_send_wr->mad_agent_priv->agent.rmpp_version) {