linux-toradex.git/drivers/infiniband/ulp/iser, branch v3.10.78

IB/iser: Add Mellanox copyright

2013-06-05T00:03:12+00:00

Add Mellanox copyright to the iser initiator source code which I maintain.

Signed-off-by: Or Gerlitz 
Signed-off-by: Roland Dreier

IB/iser: Fix device removal flow

2013-06-05T00:03:11+00:00

Change the code to destroy the "last opened" rdma_cm id after making
sure we released all other objects (QP, CQs, PD, etc) associated with
the IB device.

Since iser accesses the IB device using the rdma_cm id, we need to
free any objects that are related to the device that is associated
with the rdma_cm id prior to destroying that id.  When this isn't
done, the low level driver that created this device can be unloaded
before iser has a chance to free all the objects and a such a call may
invoke code segment which isn't valid any more and crash.

Cc: Sean Hefty 
Signed-off-by: Or Gerlitz 
Signed-off-by: Roland Dreier

IB/iser: Add support for iser CM REQ additional info

2013-05-02T00:34:14+00:00

Annex A12 of the IBTA spec defines additional information that needs
to be provided through the CM exchange relating to usage of ZBVA (Zero
Based VAs) and Send With Invalidate over an iSER connection.

Currently, the initiator sets both to not supported, but does provide
the header so that existing iSER targets can be patched to start
looking on the private data carried by the CM.

This is a preparation step to enable iSER with HW drivers for which
FMRs are not supported, such as mlx4 VF instances or new HW devices
which might support only FRWR (Fast Registration Work-Requests) along
the details of the IB_DEVICE_MEM_MGT_EXTENSIONS device capability.

Signed-off-by: Or Gerlitz 
Signed-off-by: Roland Dreier

IB/iser: Return error to upper layers on EAGAIN registration failures

2013-05-02T00:34:13+00:00

Commit 819a087316a6 ("IB/iser: Avoid error prints on EAGAIN
registration failures") not only eliminated the error print on that
case, but rather also modified the code such that it doesn't return
any error to upper layers.  As a result a wrong mapping was used.  Fix
this to correctly return the error in that case.

Signed-off-by: Or Gerlitz 
Signed-off-by: Roland Dreier

IB/iser: Move informational messages from error to info level

2013-05-02T00:34:13+00:00

Introduce iser_info() and move informational messages that were
printed as errors to use that macro. Also, cleanup printk leftovers to
use the existing macros.

Signed-off-by: Roi Dayan 
Signed-off-by: Or Gerlitz 

[ Use pr_warn(... instead of printk(KERN_WARNING ....  - Roland ]

Signed-off-by: Roland Dreier

IB/iser: Add module version

2013-05-02T00:34:13+00:00

Add displaying module version, update the version to 1.1,
and remove the DRV_DATE define.

Signed-off-by: Roi Dayan 
Signed-off-by: Or Gerlitz 
Signed-off-by: Roland Dreier

IB/iser: Enable iser when FMRs are not supported

2013-02-22T08:22:30+00:00

Reuse the "SG unaligned for FMR" driver flow to make the initiator
functional when running over driver instance which doesn't support
FMRs, such as a mlx4 virtual function.

Signed-off-by: Or Gerlitz 
Signed-off-by: Alex Tabachnik 
Signed-off-by: Roland Dreier

IB/iser: Avoid error prints on EAGAIN registration failures

2013-02-22T08:22:29+00:00

Under IO/CPU stress its possible that the FMR pool might not have a
free FMR mapping element for iSER to use because of incomplete
background unmapping processing.  In that case we get -EAGAIN and the
IO is pushed back to the SCSI layer which soon retries it.  No need to
be so verbose about that.

Signed-off-by: Or Gerlitz 
Signed-off-by: Roland Dreier

IB/iser: Use proper define for the commands per LUN value advertised to SCSI ML

2013-02-22T08:22:29+00:00

ISER_DEF_CMD_PER_LUN was meant to be ISCSI_DEF_XMIT_CMDS_MAX, not plain 128

Signed-off-by: Roi Dayan 
Signed-off-by: Or Gerlitz 
Signed-off-by: Roland Dreier

IB/iser: Add more RX CQs to scale out processing of SCSI responses

2012-10-04T04:26:49+00:00

RX/TX CQs will now be selected from a per HCA pool.  For the RX flow
this has the effect of using different interrupt vectors when using
low level drivers (such as mlx4) that map the "vector" param provided
by the ULP on CQ creation to a dedicated IRQ/MSI-X vector.  This
allows the RX flow processing of IO responses to be distributed across
multiple CPUs.

QPs (--> iSER sessions) are assigned to CQs in round robin order using
the CQ with the minimum number of sessions attached to it.

Signed-off-by: Or Gerlitz 
Signed-off-by: Alex Tabachnik 
Signed-off-by: Roland Dreier