diff options
| author | Yishai Hadas <yishaih@mellanox.com> | 2014-01-28 15:40:15 +0400 |
|---|---|---|
| committer | Roland Dreier <roland@purestorage.com> | 2014-03-04 22:34:28 +0400 |
| commit | eeb8461e36c99fdf2d058751be924a2aab215005 (patch) | |
| tree | c92498349f842be5985194c840e2dd12201df861 /drivers/infiniband/hw/mlx4/mr.c | |
| parent | cfbf8d4857c26a8a307fb7cd258074c9dcd8c691 (diff) | |
| download | linux-eeb8461e36c99fdf2d058751be924a2aab215005.tar.xz | |
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/mlx4/mr.c')
| -rw-r--r-- | drivers/infiniband/hw/mlx4/mr.c | 39 |
1 files changed, 19 insertions, 20 deletions
diff --git a/drivers/infiniband/hw/mlx4/mr.c b/drivers/infiniband/hw/mlx4/mr.c index e471f089ff00..cb2a8727f3fb 100644 --- a/drivers/infiniband/hw/mlx4/mr.c +++ b/drivers/infiniband/hw/mlx4/mr.c @@ -90,11 +90,11 @@ int mlx4_ib_umem_write_mtt(struct mlx4_ib_dev *dev, struct mlx4_mtt *mtt, struct ib_umem *umem) { u64 *pages; - struct ib_umem_chunk *chunk; - int i, j, k; + int i, k, entry; int n; int len; int err = 0; + struct scatterlist *sg; pages = (u64 *) __get_free_page(GFP_KERNEL); if (!pages) @@ -102,26 +102,25 @@ int mlx4_ib_umem_write_mtt(struct mlx4_ib_dev *dev, struct mlx4_mtt *mtt, i = n = 0; - list_for_each_entry(chunk, &umem->chunk_list, list) - for (j = 0; j < chunk->nmap; ++j) { - len = sg_dma_len(&chunk->page_list[j]) >> mtt->page_shift; - for (k = 0; k < len; ++k) { - pages[i++] = sg_dma_address(&chunk->page_list[j]) + - umem->page_size * k; - /* - * Be friendly to mlx4_write_mtt() and - * pass it chunks of appropriate size. - */ - if (i == PAGE_SIZE / sizeof (u64)) { - err = mlx4_write_mtt(dev->dev, mtt, n, - i, pages); - if (err) - goto out; - n += i; - i = 0; - } + for_each_sg(umem->sg_head.sgl, sg, umem->nmap, entry) { + len = sg_dma_len(sg) >> mtt->page_shift; + for (k = 0; k < len; ++k) { + pages[i++] = sg_dma_address(sg) + + umem->page_size * k; + /* + * Be friendly to mlx4_write_mtt() and + * pass it chunks of appropriate size. + */ + if (i == PAGE_SIZE / sizeof (u64)) { + err = mlx4_write_mtt(dev->dev, mtt, n, + i, pages); + if (err) + goto out; + n += i; + i = 0; } } + } if (i) err = mlx4_write_mtt(dev->dev, mtt, n, i, pages); |