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IB/mlx5: Modify to work with arbitrary page size 

When dealing with umem objects, the driver assumed host page sizes
defined by PAGE_SHIFT.  Modify the code to use arbitrary page shift
provided by umem->page_shift to support different page sizes.

Signed-off-by: Yishai Hadas <yishaih@mellanox.com>
Signed-off-by: Eli Cohen <eli@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
This commit is contained in:
Yishai Hadas 2014-09-14 16:47:55 +03:00 committed by Roland Dreier
parent f83b42636a
commit f39f86971c
1 changed files with 10 additions and 8 deletions
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18
drivers/infiniband/hw/mlx5/mem.c
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@ -55,16 +55,17 @@ void mlx5_ib_cont_pages(struct ib_umem *umem, u64 addr, int *count, int *shift,
u64 pfn;
struct scatterlist *sg;
int entry;
unsigned long page_shift = ilog2(umem->page_size);
addr = addr >> PAGE_SHIFT;
addr = addr >> page_shift;
tmp = (unsigned long)addr;
m = find_first_bit(&tmp, sizeof(tmp));
skip = 1 << m;
mask = skip - 1;
i = 0;
for_each_sg(umem->sg_head.sgl, sg, umem->nmap, entry) {
len = sg_dma_len(sg) >> PAGE_SHIFT;
pfn = sg_dma_address(sg) >> PAGE_SHIFT;
len = sg_dma_len(sg) >> page_shift;
pfn = sg_dma_address(sg) >> page_shift;
for (k = 0; k < len; k++) {
if (!(i & mask)) {
tmp = (unsigned long)pfn;
@ -103,14 +104,15 @@ void mlx5_ib_cont_pages(struct ib_umem *umem, u64 addr, int *count, int *shift,
*ncont = 0;
}
*shift = PAGE_SHIFT + m;
*shift = page_shift + m;
*count = i;
}
void mlx5_ib_populate_pas(struct mlx5_ib_dev *dev, struct ib_umem *umem,
int page_shift, __be64 *pas, int umr)
{
int shift = page_shift - PAGE_SHIFT;
unsigned long umem_page_shift = ilog2(umem->page_size);
int shift = page_shift - umem_page_shift;
int mask = (1 << shift) - 1;
int i, k;
u64 cur = 0;
@ -121,11 +123,11 @@ void mlx5_ib_populate_pas(struct mlx5_ib_dev *dev, struct ib_umem *umem,
i = 0;
for_each_sg(umem->sg_head.sgl, sg, umem->nmap, entry) {
len = sg_dma_len(sg) >> PAGE_SHIFT;
len = sg_dma_len(sg) >> umem_page_shift;
base = sg_dma_address(sg);
for (k = 0; k < len; k++) {
if (!(i & mask)) {
cur = base + (k << PAGE_SHIFT);
cur = base + (k << umem_page_shift);
if (umr)
cur |= 3;
@ -134,7 +136,7 @@ void mlx5_ib_populate_pas(struct mlx5_ib_dev *dev, struct ib_umem *umem,
i >> shift, be64_to_cpu(pas[i >> shift]));
} else
mlx5_ib_dbg(dev, "=====> 0x%llx\n",
base + (k << PAGE_SHIFT));
base + (k << umem_page_shift));
i++;
}
}