linux-stable.git/drivers/infiniband/ulp/iser/iser_memory.c, branch linux-4.15.y

IB: Correct MR length field to be 64-bit

2017-09-25T15:47:23+00:00

The ib_mr->length represents the length of the MR in bytes as per
the IBTA spec 1.3 section 11.2.10.3 (REGISTER PHYSICAL MEMORY REGION).

Currently ib_mr->length field is defined as only 32-bits field.
This might result into truncation and failed WRs of consumers who
registers more than 4GB bytes memory regions and whose WRs accessing
such MRs.

This patch makes the length 64-bit to avoid such truncation.

Cc: Sagi Grimberg 
Cc: Chuck Lever 
Cc: Faisal Latif 
Fixes: 4c67e2bfc8b7 ("IB/core: Introduce new fast registration API")
Signed-off-by: Ilya Lesokhin 
Signed-off-by: Parav Pandit 
Signed-off-by: Leon Romanovsky 
Signed-off-by: Doug Ledford

IB/iser: use IB_PD_UNSAFE_GLOBAL_RKEY

2016-09-23T17:47:44+00:00

Signed-off-by: Christoph Hellwig 
Reviewed-by: Sagi Grimberg 
Reviewed-by: Jason Gunthorpe 
Reviewed-by: Steve Wise 
Signed-off-by: Doug Ledford

IB/core: Enhance ib_map_mr_sg()

2016-05-13T17:37:57+00:00

The SRP initiator allows to set max_sectors to a value that exceeds
the largest amount of data that can be mapped at once with an mlx4
HCA using fast registration and a page size of 4 KB. Hence modify
ib_map_mr_sg() such that it can map partial sg-elements. If an
sg-element has been mapped partially, let the caller know
which fraction has been mapped by adjusting *sg_offset.

Signed-off-by: Bart Van Assche 
Tested-by: Laurence Oberman 
Cc: Christoph Hellwig 
Cc: Sagi Grimberg 
Signed-off-by: Doug Ledford

IB/core: Add passing an offset into the SG to ib_map_mr_sg

2016-05-13T17:37:11+00:00

Signed-off-by: Christoph Hellwig 
Tested-by: Steve Wise 
Reviewed-by: Bart Van Assche 
Reviewed-by: Sagi Grimberg 
Reviewed-by: Steve Wise 
Signed-off-by: Doug Ledford

IB/iser: Support the remote invalidation exception

2015-12-27T00:27:10+00:00

Declare that we support remote invalidation in case we are:
1. using fastreg method
2. always registering memory

Detect the invalidated rkey from the work completion info so we
won't invalidate it locally. The spec mandates that we must not rely
on the target remote invalidate our rkey so we must check it upon
a receive (scsi response) completion.

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

IB/iser: Change the increment rkey flow logic

2015-12-24T05:17:36+00:00

When we enable remote invalidate support we won't want to perform
local invalidates at the same time we do today, but we still need
to get new rkeys.  So, decouple the rkey update from the local
invalidate and tie it to memory reg instead.

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

IB/iser: set intuitive values for mr_valid

2015-12-24T05:17:34+00:00

This parameter is described as "is mr valid indicator".
In other words, it indicates whether memory registration
is valid or not. So intuitive values would be:
mr_valid=True, when memory registration is valid and
mr_valid=False otherwise.

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

IB/iser: Don't register memory for all immediate data writes

2015-12-24T05:17:34+00:00

When all the task data is sent as immediate data, we are
allowed to use the local_dma_lkey as it is not sent to
the wire.

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

IB/iser: Reuse ib_sg_to_pages

2015-12-24T05:17:34+00:00

We have in iser iser_sg_to_page_vec which has exactly
the same role as ib_sg_to_pages. Customize the page_vec
to hold a fake MR so we can reuse ib_sg_to_pages.

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

IB/iser: constify iser_reg_ops structure

2015-12-24T05:17:33+00:00

The iser_reg_ops structures are never modified, so declare them as const.

Done with the help of Coccinelle.

Signed-off-by: Julia Lawall 
Acked-by: Sagi Grimberg 
Signed-off-by: Doug Ledford