diff options
| author | Yishai Hadas <yishaih@mellanox.com> | 2014-01-28 12:40:15 +0100 |
|---|---|---|
| committer | Roland Dreier <roland@purestorage.com> | 2014-03-04 19:34:28 +0100 |
| commit | eeb8461e36c99fdf2d058751be924a2aab215005 (patch) | |
| tree | c92498349f842be5985194c840e2dd12201df861 /drivers/infiniband/hw/cxgb3 | |
| parent | Linux 3.14-rc4 (diff) | |
| download | linux-eeb8461e36c99fdf2d058751be924a2aab215005.tar.xz linux-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/cxgb3')
| -rw-r--r-- | drivers/infiniband/hw/cxgb3/iwch_provider.c | 19 |
1 files changed, 7 insertions, 12 deletions
diff --git a/drivers/infiniband/hw/cxgb3/iwch_provider.c b/drivers/infiniband/hw/cxgb3/iwch_provider.c index d2283837d451..811b24a539c0 100644 --- a/drivers/infiniband/hw/cxgb3/iwch_provider.c +++ b/drivers/infiniband/hw/cxgb3/iwch_provider.c @@ -618,14 +618,13 @@ static struct ib_mr *iwch_reg_user_mr(struct ib_pd *pd, u64 start, u64 length, { __be64 *pages; int shift, n, len; - int i, j, k; + int i, k, entry; int err = 0; - struct ib_umem_chunk *chunk; struct iwch_dev *rhp; struct iwch_pd *php; struct iwch_mr *mhp; struct iwch_reg_user_mr_resp uresp; - + struct scatterlist *sg; PDBG("%s ib_pd %p\n", __func__, pd); php = to_iwch_pd(pd); @@ -645,9 +644,7 @@ static struct ib_mr *iwch_reg_user_mr(struct ib_pd *pd, u64 start, u64 length, shift = ffs(mhp->umem->page_size) - 1; - n = 0; - list_for_each_entry(chunk, &mhp->umem->chunk_list, list) - n += chunk->nents; + n = mhp->umem->nmap; err = iwch_alloc_pbl(mhp, n); if (err) @@ -661,12 +658,10 @@ static struct ib_mr *iwch_reg_user_mr(struct ib_pd *pd, u64 start, u64 length, i = n = 0; - list_for_each_entry(chunk, &mhp->umem->chunk_list, list) - for (j = 0; j < chunk->nmap; ++j) { - len = sg_dma_len(&chunk->page_list[j]) >> shift; + for_each_sg(mhp->umem->sg_head.sgl, sg, mhp->umem->nmap, entry) { + len = sg_dma_len(sg) >> shift; for (k = 0; k < len; ++k) { - pages[i++] = cpu_to_be64(sg_dma_address( - &chunk->page_list[j]) + + pages[i++] = cpu_to_be64(sg_dma_address(sg) + mhp->umem->page_size * k); if (i == PAGE_SIZE / sizeof *pages) { err = iwch_write_pbl(mhp, pages, i, n); @@ -676,7 +671,7 @@ static struct ib_mr *iwch_reg_user_mr(struct ib_pd *pd, u64 start, u64 length, i = 0; } } - } + } if (i) err = iwch_write_pbl(mhp, pages, i, n); |