diff options
| author | Sean Hefty <sean.hefty@intel.com> | 2007-11-27 00:11:04 -0800 |
|---|---|---|
| committer | Roland Dreier <rolandd@cisco.com> | 2008-01-25 14:15:30 -0800 |
| commit | 4fc8cd4919428f9b86f0b65e2f3245a1c186737f (patch) | |
| tree | 07bca41da2be7504e6d17745fb86264e59a4958e | |
| parent | 547af76521b3fd4b9ec5c9a9975a17eadb95e6f6 (diff) | |
| download | linux-4fc8cd4919428f9b86f0b65e2f3245a1c186737f.tar.gz linux-4fc8cd4919428f9b86f0b65e2f3245a1c186737f.tar.bz2 linux-4fc8cd4919428f9b86f0b65e2f3245a1c186737f.zip | |
IB/mad: Report number of times a mad was retried
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>
| -rw-r--r-- | drivers/infiniband/core/mad.c | 9 | ||||
| -rw-r--r-- | drivers/infiniband/core/mad_priv.h | 3 | ||||
| -rw-r--r-- | drivers/infiniband/core/mad_rmpp.c | 2 | ||||
| -rw-r--r-- | include/rdma/ib_mad.h | 4 |
4 files changed, 13 insertions, 5 deletions
diff --git a/drivers/infiniband/core/mad.c b/drivers/infiniband/core/mad.c index 649335a03312..5eace995836d 100644 --- a/drivers/infiniband/core/mad.c +++ b/drivers/infiniband/core/mad.c @@ -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) { diff --git a/drivers/infiniband/core/mad_priv.h b/drivers/infiniband/core/mad_priv.h index 9be5cc00a3a9..8b75010016ec 100644 --- a/drivers/infiniband/core/mad_priv.h +++ b/drivers/infiniband/core/mad_priv.h @@ -131,7 +131,8 @@ struct ib_mad_send_wr_private { struct ib_sge sg_list[IB_MAD_SEND_REQ_MAX_SG]; __be64 tid; unsigned long timeout; - int retries; + int max_retries; + int retries_left; int retry; int refcount; enum ib_wc_status status; diff --git a/drivers/infiniband/core/mad_rmpp.c b/drivers/infiniband/core/mad_rmpp.c index d43bc62005b3..a5e2a310f312 100644 --- a/drivers/infiniband/core/mad_rmpp.c +++ b/drivers/infiniband/core/mad_rmpp.c @@ -684,7 +684,7 @@ static void process_rmpp_ack(struct ib_mad_agent_private *agent, if (seg_num > mad_send_wr->last_ack) { adjust_last_ack(mad_send_wr, seg_num); - mad_send_wr->retries = mad_send_wr->send_buf.retries; + mad_send_wr->retries_left = mad_send_wr->max_retries; } mad_send_wr->newwin = newwin; if (mad_send_wr->last_ack == mad_send_wr->send_buf.seg_count) { diff --git a/include/rdma/ib_mad.h b/include/rdma/ib_mad.h index 8ec3799e42e1..7228c056b9e9 100644 --- a/include/rdma/ib_mad.h +++ b/include/rdma/ib_mad.h @@ -230,7 +230,9 @@ struct ib_class_port_info * @seg_count: The number of RMPP segments allocated for this send. * @seg_size: Size of each RMPP segment. * @timeout_ms: Time to wait for a response. - * @retries: Number of times to retry a request for a response. + * @retries: Number of times to retry a request for a response. For MADs + * using RMPP, this applies per window. On completion, returns the number + * of retries needed to complete the transfer. * * Users are responsible for initializing the MAD buffer itself, with the * exception of any RMPP header. Additional segment buffer space allocated |