linux.git/drivers/infiniband/ulp, branch v4.8-rc2

Merge tag 'for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma

2016-08-05T00:26:31+00:00

Pull second round of rdma updates from Doug Ledford:
 "This can be split out into just two categories:

   - fixes to the RDMA R/W API in regards to SG list length limits
     (about 5 patches)

   - fixes/features for the Intel hfi1 driver (everything else)

  The hfi1 driver is still being brought to full feature support by
  Intel, and they have a lot of people working on it, so that amounts to
  almost the entirety of this pull request"

* tag 'for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma: (84 commits)
  IB/hfi1: Add cache evict LRU list
  IB/hfi1: Fix memory leak during unexpected shutdown
  IB/hfi1: Remove unneeded mm argument in remove function
  IB/hfi1: Consistently call ops->remove outside spinlock
  IB/hfi1: Use evict mmu rb operation
  IB/hfi1: Add evict operation to the mmu rb handler
  IB/hfi1: Fix TID caching actions
  IB/hfi1: Make the cache handler own its rb tree root
  IB/hfi1: Make use of mm consistent
  IB/hfi1: Fix user SDMA racy user request claim
  IB/hfi1: Fix error condition that needs to clean up
  IB/hfi1: Release node on insert failure
  IB/hfi1: Validate SDMA user iovector count
  IB/hfi1: Validate SDMA user request index
  IB/hfi1: Use the same capability state for all shared contexts
  IB/hfi1: Prevent null pointer dereference
  IB/hfi1: Rename TID mmu_rb_* functions
  IB/hfi1: Remove unneeded empty check in hfi1_mmu_rb_unregister()
  IB/hfi1: Restructure hfi1_file_open
  IB/hfi1: Make iovec loop index easy to understand
  ...

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

2016-08-05T00:10:31+00:00

Pull base rdma updates from Doug Ledford:
 "Round one of 4.8 code: while this is mostly normal, there is a new
  driver in here (the driver was hosted outside the kernel for several
  years and is actually a fairly mature and well coded driver).  It
  amounts to 13,000 of the 16,000 lines of added code in here.

  Summary:

   - Updates/fixes for iw_cxgb4 driver
   - Updates/fixes for mlx5 driver
   - Add flow steering and RSS API
   - Add hardware stats to mlx4 and mlx5 drivers
   - Add firmware version API for RDMA driver use
   - Add the rxe driver (this is a software RoCE driver that makes any
     Ethernet device a RoCE device)
   - Fixes for i40iw driver
   - Support for send only multicast joins in the cma layer
   - Other minor fixes"

* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma: (72 commits)
  Soft RoCE driver
  IB/core: Support for CMA multicast join flags
  IB/sa: Add cached attribute containing SM information to SA port
  IB/uverbs: Fix race between uverbs_close and remove_one
  IB/mthca: Clean up error unwind flow in mthca_reset()
  IB/mthca: NULL arg to pci_dev_put is OK
  IB/hfi1: NULL arg to sc_return_credits is OK
  IB/mlx4: Add diagnostic hardware counters
  net/mlx4: Query performance and diagnostics counters
  net/mlx4: Add diagnostic counters capability bit
  Use smaller 512 byte messages for portmapper messages
  IB/ipoib: Report SG feature regardless of HW UD CSUM capability
  IB/mlx4: Don't use GFP_ATOMIC for CQ resize struct
  IB/hfi1: Disable by default
  IB/rdmavt: Disable by default
  IB/mlx5: Fix port counter ID association to QP offset
  IB/mlx5: Fix iteration overrun in GSI qps
  i40iw: Add NULL check for puda buffer
  i40iw: Change dup_ack_thresh to u8
  i40iw: Remove unnecessary check for moving CQ head
  ...

Merge branches 'misc' and 'rxe' into k.o/for-4.8-1

2016-08-04T15:13:47+00:00

IB/ipoib: Report SG feature regardless of HW UD CSUM capability

2016-08-04T01:03:32+00:00

Decouple SG support from HW ability to do UD checksum.
This coupling is for historical reasons and removed with 'commit
ec5f06156423 ("net: Kill link between CSUM and SG features.")'

During driver load it is assumed that device does not supports SG. The
final decision is taken after creating UD QP based on device capability.

Signed-off-by: Yuval Shaia 
Reviewed-by: Jason Gunthorpe 
Signed-off-by: Doug Ledford

IB/isert: Remove an unused member variable

2016-08-02T16:02:41+00:00

Signed-off-by: Bart Van Assche 
Reviewed-by: Sagi Grimberg 
Reviewed-by: Christoph Hellwig 
Tested-by: Steve Wise 
Tested-by: Laurence Oberman 
Cc: Parav Pandit 
Cc: Nicholas Bellinger 
Signed-off-by: Doug Ledford

IB/srpt: Simplify srpt_queue_response()

2016-08-02T16:02:41+00:00

Initialize first_wr to &send_wr. This allows to remove a ternary
operator and an else branch. This patch does not change the behavior
of srpt_queue_response().

Signed-off-by: Bart Van Assche 
Reviewed-by: Christoph Hellwig 
Reviewed-by: Sagi Grimberg 
Tested-by: Steve Wise 
Tested-by: Laurence Oberman 
Cc: Parav Pandit 
Cc: Nicholas Bellinger 
Signed-off-by: Doug Ledford

IB/srpt: Limit the number of SG elements per work request

2016-08-02T16:02:41+00:00

Limit the number of SG elements per work request to what the HCA
and the queue pair support.

Fixes: 34693573fde0 ("IB/srpt: Reduce QP buffer size")
Reported-by: Parav Pandit 
Signed-off-by: Bart Van Assche 
Cc: Christoph Hellwig 
Cc: Sagi Grimberg 
Cc: Steve Wise 
Cc: Parav Pandit 
Cc: Nicholas Bellinger 
Cc: Laurence Oberman 
Cc:  #v4.7+
Reviewed-by: Christoph Hellwig 
Signed-off-by: Doug Ledford

IB/ipoib: Use new device FW version string

2016-06-23T16:08:34+00:00

Using this allows for devices to specify the format of their
firmware version rather than forcing a format.

Reviewed-by: Dennis Dalessandro 
Signed-off-by: Ira Weiny 
Signed-off-by: Doug Ledford

IB/srpt: Reduce QP buffer size

2016-06-23T16:04:09+00:00

The memory needed for the send and receive queues associated with
a QP is proportional to the max_sge parameter. The current value
of that parameter is such that with an mlx4 HCA the QP buffer size
is 8 MB. Since DMA is used for communication between HCA and CPU
that buffer either has to be allocated coherently or map_single()
must succeed for that buffer. Since large contiguous allocations
are fragile and since the maximum segment size for e.g. swiotlb
is 256 KB, reduce the max_sge parameter. This patch avoids that
the following text appears on the console after SRP logout and
relogin on a system equipped with multiple IB HCAs:

mlx4_core 0000:05:00.0: swiotlb buffer is full (sz: 8388608 bytes)
swiotlb: coherent allocation failed for device 0000:05:00.0 size=8388608
CPU: 11 PID: 148 Comm: kworker/11:1 Not tainted 4.7.0-rc4-dbg+ #1
Call Trace:
 [] dump_stack+0x67/0x92
 [] swiotlb_alloc_coherent+0x141/0x150
 [] x86_swiotlb_alloc_coherent+0x3e/0x50
 [] mlx4_buf_direct_alloc.isra.5+0x9a/0x120 [mlx4_core]
 [] mlx4_buf_alloc+0x165/0x1a0 [mlx4_core]
 [] create_qp_common.isra.29+0x57d/0xff0 [mlx4_ib]
 [] mlx4_ib_create_qp+0x12a/0x3f0 [mlx4_ib]
 [] ib_create_qp+0x3a/0x250 [ib_core]
 [] srpt_cm_handler+0x4bb/0xcad [ib_srpt]
 [] cm_process_work+0x20/0xf0 [ib_cm]
 [] cm_work_handler+0x1ac0/0x2059 [ib_cm]
 [] process_one_work+0x19d/0x490
 [] worker_thread+0x49/0x490
 [] kthread+0xea/0x100
 [] ret_from_fork+0x1f/0x40

Fixes: b99f8e4d7bcd ("IB/srpt: convert to the generic RDMA READ/WRITE API")
Signed-off-by: Bart Van Assche 
Cc: Laurence Oberman 
Cc: Christoph Hellwig 
Cc: Sagi Grimberg 
Signed-off-by: Doug Ledford

IB/IPoIB: Don't update neigh validity for unresolved entries

2016-06-07T14:49:48+00:00

ipoib_neigh_get unconditionally updates the "alive" variable member on
any packet send.  This prevents the neighbor garbage collection from
cleaning out a dead neighbor entry if we are still queueing packets
for it.  If the queue for this neighbor is full, then don't update the
alive timestamp.  That way the neighbor can time out even if packets
are still being queued as long as none of them are being sent.

Fixes: b63b70d87741 ("IPoIB: Use a private hash table for path lookup in xmit path")
Signed-off-by: Erez Shitrit 
Signed-off-by: Leon Romanovsky 
Signed-off-by: Doug Ledford