linux-toradex.git/drivers/infiniband/ulp/iser, branch v4.4.73

IB/iser: use sector_div instead of do_div

2015-12-07T21:42:33+00:00

do_div is the wrong way to divide a sector_t, as it is less
efficient when sector_t is 32-bit wide. With the upcoming
do_div optimizations, the kernel starts warning about this:

drivers/infiniband/ulp/iser/iser_verbs.c:1296:4: note: in expansion of macro 'do_div'
include/asm-generic/div64.h:224:22: warning: passing argument 1 of '__div64_32' from incompatible pointer type

This changes the code to use sector_div instead, which always
produces optimal code.

Signed-off-by: Arnd Bergmann 
Reviewed-by: Sagi Grimberg 
Signed-off-by: Doug Ledford

IB/iser: Port to new fast registration API

2015-10-29T02:27:18+00:00

Remove fastreg page list allocation as the page vector
is now private to the provider. Instead of constructing
the page list and fast_req work request, call ib_map_mr_sg
and construct ib_reg_wr.

Signed-off-by: Sagi Grimberg 
Acked-by: Christoph Hellwig 
Signed-off-by: Doug Ledford

Merge branch 'wr-cleanup' into k.o/for-4.4

2015-10-29T02:23:34+00:00

IB/cma: Add support for network namespaces

2015-10-28T16:32:48+00:00

Add support for network namespaces in the ib_cma module. This is
accomplished by:

1. Adding network namespace parameter for rdma_create_id. This parameter is
   used to populate the network namespace field in rdma_id_private.
   rdma_create_id keeps a reference on the network namespace.
2. Using the network namespace from the rdma_id instead of init_net inside
   of ib_cma, when listening on an ID and when looking for an ID for an
   incoming request.
3. Decrementing the reference count for the appropriate network namespace
   when calling rdma_destroy_id.

In order to preserve the current behavior init_net is passed when calling
from other modules.

Signed-off-by: Guy Shapiro 
Signed-off-by: Haggai Eran 
Signed-off-by: Yotam Kenneth 
Signed-off-by: Shachar Raindel 
Signed-off-by: Doug Ledford

IB/iser: Enable SG clustering

2015-10-28T16:26:06+00:00

iser is perfectly capable supporting SG clustering as it translates
the SG list to a page vector. Enabling SG clustering can dramatically
reduce the number of SG elements, which doesn't make much of a difference
at this point, but with arbitrary SG list support, reducing the
number of SG elements can benefit greatly as as it would reduce
the length of the HW descriptors array.

Signed-off-by: Sagi Grimberg 
Reviewed-by: Christoph Hellwig 
Signed-off-by: Doug Ledford

IB/iser: set block queue_virt_boundary

2015-10-28T16:26:06+00:00

The block layer can reliably guarantee that SG lists won't
contain gaps (page unaligned) if a driver set the queue
virt_boundary.

With this setting the block layer will:
- refuse merges if bios are not aligned to the virtual boundary
- split bios/requests that are not aligned to the virtual boundary
- or, bounce buffer SG_IOs that are not aligned to the virtual boundary

Since iser is working in 4K page size, set the virt_boundary to
4K pages. With this setting, we can now safely remove the bounce
buffering logic in iser.

Signed-off-by: Sagi Grimberg 
Reviewed-by: Christoph Hellwig 
Signed-off-by: Doug Ledford

IB/iser: Remove an unused variable

2015-10-22T22:37:14+00:00

Detected this by compiling with W=1.

Signed-off-by: Bart Van Assche 
Cc: Sagi Grimberg 
Signed-off-by: Doug Ledford

IB/iser: fix a comment typo

2015-10-21T20:41:54+00:00

Just fix a typo in the code comment.

Signed-off-by: Geliang Tang 
Acked-by: Sagi Grimberg 
Signed-off-by: Doug Ledford

IB: split struct ib_send_wr

2015-10-08T10:09:10+00:00

This patch split up struct ib_send_wr so that all non-trivial verbs
use their own structure which embedds struct ib_send_wr.  This dramaticly
shrinks the size of a WR for most common operations:

sizeof(struct ib_send_wr) (old):	96

sizeof(struct ib_send_wr):		48
sizeof(struct ib_rdma_wr):		64
sizeof(struct ib_atomic_wr):		96
sizeof(struct ib_ud_wr):		88
sizeof(struct ib_fast_reg_wr):		88
sizeof(struct ib_bind_mw_wr):		96
sizeof(struct ib_sig_handover_wr):	80

And with Sagi's pending MR rework the fast registration WR will also be
down to a reasonable size:

sizeof(struct ib_fastreg_wr):		64

Signed-off-by: Christoph Hellwig 
Reviewed-by: Bart Van Assche  [srp, srpt]
Reviewed-by: Chuck Lever  [sunrpc]
Tested-by: Haggai Eran 
Tested-by: Sagi Grimberg 
Tested-by: Steve Wise

IB/iser: Add module parameter for always register memory

2015-09-25T14:46:51+00:00

This module parameter forces memory registration even for
a continuous memory region. It is true by default as sending
an all-physical rkey with remote permissions might be insecure.

Signed-off-by: Sagi Grimberg 
Signed-off-by: Doug Ledford