diff options
| author | Bart Van Assche <bart.vanassche@sandisk.com> | 2016-05-12 10:49:15 -0700 |
|---|---|---|
| committer | Doug Ledford <dledford@redhat.com> | 2016-05-13 13:37:57 -0400 |
| commit | 9aa8b3217ed3c13d4e3496020b140da0e6f49a08 (patch) | |
| tree | 4bf6441f7c72dcd7f07c15091e1212512446e680 /include/rdma | |
| parent | f83b2561a6d4ff12959660ad597580097b744941 (diff) | |
| download | lwn-9aa8b3217ed3c13d4e3496020b140da0e6f49a08.tar.gz lwn-9aa8b3217ed3c13d4e3496020b140da0e6f49a08.zip | |
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.h | 8 |
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); |