linux.git/drivers/infiniband/ulp/iser, branch v3.9-rc2

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

IB/iser: Fix error flow in iser ep connection establishment

2012-05-19T00:05:31+00:00

The current error flow code was releasing the IB connection object and
calling iscsi_destroy_endpoint() directly without going through the
reference counting mechanism introduced in commit 39ff05d ("IB/iser:
Enhance disconnection logic for multi-pathing"). This resulted in a
double free of the iscsi endpoint object, which causes a kernel NULL
pointer dereference.  Fix that by plugging into the IB conn reference
counting correctly.

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

Merge tag 'rdma-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband

2012-03-21T17:33:42+00:00

Pull InfiniBand/RDMA changes for the 3.4 merge window from Roland Dreier:
 "Nothing big really stands out; by patch count lots of fixes to the
  mlx4 driver plus some cleanups and fixes to the core and other
  drivers."

* tag 'rdma-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband: (28 commits)
  mlx4_core: Scale size of MTT table with system RAM
  mlx4_core: Allow dynamic MTU configuration for IB ports
  IB/mlx4: Fix info returned when querying IBoE ports
  IB/mlx4: Fix possible missed completion event
  mlx4_core: Report thermal error events
  mlx4_core: Fix one more static exported function
  IB: Change CQE "csum_ok" field to a bit flag
  RDMA/iwcm: Reject connect requests if cmid is not in LISTEN state
  RDMA/cxgb3: Don't pass irq flags to flush_qp()
  mlx4_core: Get rid of redundant ext_port_cap flags
  RDMA/ucma: Fix AB-BA deadlock
  IB/ehca: Fix ilog2() compile failure
  IB: Use central enum for speed instead of hard-coded values
  IB/iser: Post initial receive buffers before sending the final login request
  IB/iser: Free IB connection resources in the proper place
  IB/srp: Consolidate repetitive sysfs code
  IB/srp: Use pr_fmt() and pr_err()/pr_warn()
  IB/core: Fix SDR rates in sysfs
  mlx4: Enforce device max FMR maps in FMR alloc
  IB/mlx4: Set bad_wr for invalid send opcode
  ...

infiniband: remove the second argument of k[un]map_atomic()

2012-03-20T13:48:18+00:00

Acked-by: Roland Dreier 
Signed-off-by: Cong Wang

IB/iser: Post initial receive buffers before sending the final login request

2012-03-05T16:53:05+00:00

An iser target may send iscsi NO-OP PDUs as soon as it marks the iSER
iSCSI session as fully operative.  This means that there is window
where there are no posted receive buffers on the initiator side, so
it's possible for the iSER RC connection to break because of RNR NAK /
retry errors.  To fix this, rely on the flags bits in the login
request to have FFP (0x3) in the lower nibble as a marker for the
final login request, and post an initial chunk of receive buffers
before sending that login request instead of after getting the login
response.

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

IB/iser: Free IB connection resources in the proper place

2012-03-05T08:23:27+00:00

We allocate the login dma buffers in iser_verbs.c as part of
alloc_ib_conn_resources(), however we are freeing them in
iser_initiator.c as part of iser_free_rx_descriptors().  This is
needlessly confusing.  We have an alloc_rx_descriptors() and it
doesn't alloc something that the free_rx_descriptors() frees, and we
have an alloc_ib_conn_resources() that allocs something not freed by
free_ib_conn_resources().  Clean that up.

Signed-off-by: Doug Ledford 

[ Fix build error in iser_free_ib_conn_res().  - Or ]

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

switch ->is_visible() to returning umode_t

2012-01-04T03:54:55+00:00

Signed-off-by: Al Viro