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* IB/srp: Implement SRP_CRED_REQ and SRP_AER_REQDavid Dillow2010-10-221-0/+38
| | | | | | | | | | | | | | | | | 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>
* [SCSI] srp.h: Add I/O Class valuesRamachandra K2006-06-171-0/+5
| | | | | | | | | | Add enum values for I/O Class values from rev. 10 and rev. 16a SRP drafts. The values are used to detect targets that implement obsolete revisions of SRP, so that the initiator can use the old format for port identifier when connecting to them. Signed-off-by: Ramachandra K <rkuchimanchi@silverstorm.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
* [SCSI] srp.h: avoid padding of structsRoland Dreier2006-04-281-6/+17
| | | | | | | | | | | | | | | | | | Several structs in <scsi/srp.h> get padded to a multiple of 8 bytes on 64-bit architectures and end up with a size that does not match the definition in the SRP spec: SRP spec 64-bit sizeof (struct indirect_buf) 20 24 sizeof (struct srp_login_rsp) 52 56 sizeof (struct srp_rsp) 36 40 Fix this by adding __attribute__((packed)) to the offending structs. Problem pointed out by Arne Redlich <arne.redlich@xiranet.com>. Signed-off-by: Roland Dreier <rolandd@cisco.com> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
* IB: Add SCSI RDMA Protocol (SRP) initiatorRoland Dreier2005-11-021-0/+226
Add an InfiniBand SCSI RDMA Protocol (SRP) initiator. This driver is used to talk talk to InfiniBand SRP targets (storage devices). Signed-off-by: Roland Dreier <rolandd@cisco.com>
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