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authorBart Van Assche <bart.vanassche@sandisk.com>2016-05-12 10:49:15 -0700
committerDoug Ledford <dledford@redhat.com>2016-05-13 13:37:57 -0400
commit9aa8b3217ed3c13d4e3496020b140da0e6f49a08 (patch)
tree4bf6441f7c72dcd7f07c15091e1212512446e680 /include/rdma
parentf83b2561a6d4ff12959660ad597580097b744941 (diff)
IB/core: Enhance ib_map_mr_sg()
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 <bart.vanassche@sandisk.com> Tested-by: Laurence Oberman <loberman@redhat.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Sagi Grimberg <sagi@grimberg.me> Signed-off-by: Doug Ledford <dledford@redhat.com>
Diffstat (limited to 'include/rdma')
-rw-r--r--include/rdma/ib_verbs.h8
1 files changed, 4 insertions, 4 deletions
diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h
index 544c55b4c84a..56bb0f39ce79 100644
--- a/include/rdma/ib_verbs.h
+++ b/include/rdma/ib_verbs.h
@@ -1848,7 +1848,7 @@ struct ib_device {
int (*map_mr_sg)(struct ib_mr *mr,
struct scatterlist *sg,
int sg_nents,
- unsigned sg_offset);
+ unsigned int *sg_offset);
struct ib_mw * (*alloc_mw)(struct ib_pd *pd,
enum ib_mw_type type,
struct ib_udata *udata);
@@ -3145,11 +3145,11 @@ struct net_device *ib_get_net_dev_by_params(struct ib_device *dev, u8 port,
const struct sockaddr *addr);
int ib_map_mr_sg(struct ib_mr *mr, struct scatterlist *sg, int sg_nents,
- unsigned int sg_offset, unsigned int page_size);
+ unsigned int *sg_offset, unsigned int page_size);
static inline int
ib_map_mr_sg_zbva(struct ib_mr *mr, struct scatterlist *sg, int sg_nents,
- unsigned int sg_offset, unsigned int page_size)
+ unsigned int *sg_offset, unsigned int page_size)
{
int n;
@@ -3160,7 +3160,7 @@ ib_map_mr_sg_zbva(struct ib_mr *mr, struct scatterlist *sg, int sg_nents,
}
int ib_sg_to_pages(struct ib_mr *mr, struct scatterlist *sgl, int sg_nents,
- unsigned int sg_offset, int (*set_page)(struct ib_mr *, u64));
+ unsigned int *sg_offset, int (*set_page)(struct ib_mr *, u64));
void ib_drain_rq(struct ib_qp *qp);
void ib_drain_sq(struct ib_qp *qp);