linux-toradex.git/drivers/infiniband/core/rw.c, branch v5.0

IB/core: Ensure we map P2P memory correctly in rdma_rw_ctx_[init|destroy]()

2018-10-17T17:18:20+00:00

In order to use PCI P2P memory the pci_p2pmem_map_sg() function must be
called to map the correct PCI bus address.

To do this, check the first page in the scatter list to see if it is P2P
memory or not.  At the moment, scatter lists that contain P2P memory must
be homogeneous so if the first page is P2P the entire SGL should be P2P.

Signed-off-by: Logan Gunthorpe 
Signed-off-by: Bjorn Helgaas 
Reviewed-by: Christoph Hellwig 
Reviewed-by: Sagi Grimberg

RDMA/core: Simplify ib_post_(send|recv|srq_recv)() calls

2018-07-24T22:06:36+00:00

Instead of declaring and passing a dummy 'bad_wr' pointer, pass NULL
as third argument to ib_post_(send|recv|srq_recv)().

Signed-off-by: Bart Van Assche 
Signed-off-by: Jason Gunthorpe

RDMA/rw: Fix rdma_rw_ctx_signature_init() kernel-doc header

2018-07-09T19:07:23+00:00

Fixes: 0e353e34e1e7 ("IB/core: add RW API support for signature MRs")
Signed-off-by: Bart Van Assche 
Cc: Christoph Hellwig 
Signed-off-by: Jason Gunthorpe

IB/core: type promotion bug in rdma_rw_init_one_mr()

2018-07-04T18:05:28+00:00

"nents" is an unsigned int, so if ib_map_mr_sg() returns a negative
error code then it's type promoted to a high unsigned int which is
treated as success.

Fixes: a060b5629ab0 ("IB/core: generic RDMA READ/WRITE API")
Signed-off-by: Dan Carpenter 
Signed-off-by: Jason Gunthorpe

IB/core: remove redundant check on prot_sg_cnt

2017-10-10T14:49:45+00:00

prot_sg_cnt cannot be zero as a previous check on ret (from which
prot_sg_cnt is assigned) returns -ENOMEM if is it zero.  Since
it cannot be zero we can simplify the code by removing the non
-zero check on prot_sg_cnt and redundant else statement.

Detected by CoverityScan, COD#1357188 ("Logically dead code")

Signed-off-by: Colin Ian King 
Signed-off-by: Doug Ledford

rdma core: Add rdma_rw_mr_payload()

2017-09-05T19:15:30+00:00

The amount of payload per MR depends on device capabilities and
the memory registration mode in use. The new rdma_rw API hides both,
making it difficult for ULPs to determine how large their transport
send queues need to be.

Expose the MR payload information via a new API.

Signed-off-by: Chuck Lever 
Acked-by: Doug Ledford 
Signed-off-by: J. Bruce Fields

IB/core, RDMA RW API: Do not exceed QP SGE send limit

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

Compute the SGE limit for RDMA READ and WRITE requests in
ib_create_qp(). Use that limit in the RDMA RW API implementation.

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/core: Make rdma_rw_ctx_init() initialize all used fields

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

Some but not all callers of rdma_rw_ctx_init() zero-initialize
struct rdma_rw_ctx. Hence make rdma_rw_ctx_init() initialize all
work request fields that will be read by ib_post_send().

Fixes: a060b5629ab0 ("IB/core: generic RDMA READ/WRITE API")
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 
Cc:  #v4.7+
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 RW API support for signature MRs

2016-05-13T17:37:20+00:00

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