diff options
| author |   Yishai Hadas <yishaih@mellanox.com> | 2014-01-28 13:40:15 +0200 |
|---|---|---|
| committer |   Roland Dreier <roland@purestorage.com> | 2014-03-04 10:34:28 -0800 |
| commit | eeb8461e36c99fdf2d058751be924a2aab215005 (patch) | |
| tree | c92498349f842be5985194c840e2dd12201df861 /drivers/infiniband/hw/ipath | |
| parent | Linux 3.14-rc4 (diff) | |
| download | linux-dev-eeb8461e36c99fdf2d058751be924a2aab215005.tar.xz linux-dev-eeb8461e36c99fdf2d058751be924a2aab215005.zip | |
IB: Refactor umem to use linear SG table
This patch refactors the IB core umem code and vendor drivers to use a
linear (chained) SG table instead of chunk list. With this change the
relevant code becomes clearer—no need for nested loops to build and
use umem.
Signed-off-by: Shachar Raindel <raindel@mellanox.com>
Signed-off-by: Yishai Hadas <yishaih@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
Diffstat (limited to 'drivers/infiniband/hw/ipath')
| -rw-r--r-- | drivers/infiniband/hw/ipath/ipath_mr.c | 39 |
1 files changed, 17 insertions, 22 deletions
diff --git a/drivers/infiniband/hw/ipath/ipath_mr.c b/drivers/infiniband/hw/ipath/ipath_mr.c index e346d3890a0e..5e61e9bff697 100644 --- a/drivers/infiniband/hw/ipath/ipath_mr.c +++ b/drivers/infiniband/hw/ipath/ipath_mr.c @@ -188,8 +188,8 @@ struct ib_mr *ipath_reg_user_mr(struct ib_pd *pd, u64 start, u64 length, { struct ipath_mr *mr; struct ib_umem *umem; - struct ib_umem_chunk *chunk; - int n, m, i; + int n, m, entry; + struct scatterlist *sg; struct ib_mr *ret; if (length == 0) { @@ -202,10 +202,7 @@ struct ib_mr *ipath_reg_user_mr(struct ib_pd *pd, u64 start, u64 length, if (IS_ERR(umem)) return (void *) umem; - n = 0; - list_for_each_entry(chunk, &umem->chunk_list, list) - n += chunk->nents; - + n = umem->nmap; mr = alloc_mr(n, &to_idev(pd->device)->lk_table); if (!mr) { ret = ERR_PTR(-ENOMEM); @@ -224,22 +221,20 @@ struct ib_mr *ipath_reg_user_mr(struct ib_pd *pd, u64 start, u64 length, m = 0; n = 0; - list_for_each_entry(chunk, &umem->chunk_list, list) { - for (i = 0; i < chunk->nents; i++) { - void *vaddr; - - vaddr = page_address(sg_page(&chunk->page_list[i])); - if (!vaddr) { - ret = ERR_PTR(-EINVAL); - goto bail; - } - mr->mr.map[m]->segs[n].vaddr = vaddr; - mr->mr.map[m]->segs[n].length = umem->page_size; - n++; - if (n == IPATH_SEGSZ) { - m++; - n = 0; - } + for_each_sg(umem->sg_head.sgl, sg, umem->nmap, entry) { + void *vaddr; + + vaddr = page_address(sg_page(sg)); + if (!vaddr) { + ret = ERR_PTR(-EINVAL); + goto bail; + } + mr->mr.map[m]->segs[n].vaddr = vaddr; + mr->mr.map[m]->segs[n].length = umem->page_size; + n++; + if (n == IPATH_SEGSZ) { + m++; + n = 0; } } ret = &mr->ibmr; |