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| author | David Dillow | 2010-10-08 20:40:47 +0200 |
|---|---|---|
| committer | Roland Dreier | 2010-10-23 07:19:10 +0200 |
| commit | bb12588a38e6db85e01dceadff7bc161fc92e7d2 (patch) | |
| tree | 6cf9f3b90cc1118aa2fcd716537916524384d428 /drivers/infiniband/ulp/srp/ib_srp.h | |
| parent | IB/srp: Preparation for transmit ring response allocation (diff) | |
| download | kernel-qcow2-linux-bb12588a38e6db85e01dceadff7bc161fc92e7d2.tar.gz kernel-qcow2-linux-bb12588a38e6db85e01dceadff7bc161fc92e7d2.tar.xz kernel-qcow2-linux-bb12588a38e6db85e01dceadff7bc161fc92e7d2.zip | |
IB/srp: Implement SRP_CRED_REQ and SRP_AER_REQ
This patch adds support for SRP_CRED_REQ to avoid a lockup by targets
that use that mechanism to return credits to the initiator. This
prevents a lockup observed in the field where we would never add the
credits from the SRP_CRED_REQ to our current count, and would therefore
never send another command to the target.
Minimal support for SRP_AER_REQ is also added, as these messages can
also be used to convey additional credits to the initiator.
Based upon extensive debugging and code by Bart Van Assche and a bug
report by Chris Worley.
Signed-off-by: David Dillow <dillowda@ornl.gov>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
Diffstat (limited to 'drivers/infiniband/ulp/srp/ib_srp.h')
| -rw-r--r-- | drivers/infiniband/ulp/srp/ib_srp.h | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/drivers/infiniband/ulp/srp/ib_srp.h b/drivers/infiniband/ulp/srp/ib_srp.h index 7a959d5f2fa6..ed0dce9e479f 100644 --- a/drivers/infiniband/ulp/srp/ib_srp.h +++ b/drivers/infiniband/ulp/srp/ib_srp.h @@ -82,9 +82,10 @@ enum srp_target_state { SRP_TARGET_REMOVED }; -enum srp_request_type { - SRP_REQ_NORMAL, - SRP_REQ_TASK_MGMT, +enum srp_iu_type { + SRP_IU_CMD, + SRP_IU_TSK_MGMT, + SRP_IU_RSP, }; struct srp_device { @@ -171,6 +172,7 @@ struct srp_iu { void *buf; size_t size; enum dma_data_direction direction; + enum srp_iu_type type; }; #endif /* IB_SRP_H */ |