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path: root/drivers/infiniband/hw/mlx5/mem.c
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Diffstat (limited to 'drivers/infiniband/hw/mlx5/mem.c')
-rw-r--r--drivers/infiniband/hw/mlx5/mem.c32
1 files changed, 25 insertions, 7 deletions
diff --git a/drivers/infiniband/hw/mlx5/mem.c b/drivers/infiniband/hw/mlx5/mem.c
index 6851357c16f4..778d8a18925f 100644
--- a/drivers/infiniband/hw/mlx5/mem.c
+++ b/drivers/infiniband/hw/mlx5/mem.c
@@ -159,7 +159,7 @@ void __mlx5_ib_populate_pas(struct mlx5_ib_dev *dev, struct ib_umem *umem,
unsigned long umem_page_shift = ilog2(umem->page_size);
int shift = page_shift - umem_page_shift;
int mask = (1 << shift) - 1;
- int i, k;
+ int i, k, idx;
u64 cur = 0;
u64 base;
int len;
@@ -185,18 +185,36 @@ void __mlx5_ib_populate_pas(struct mlx5_ib_dev *dev, struct ib_umem *umem,
for_each_sg(umem->sg_head.sgl, sg, umem->nmap, entry) {
len = sg_dma_len(sg) >> umem_page_shift;
base = sg_dma_address(sg);
- for (k = 0; k < len; k++) {
+
+ /* Skip elements below offset */
+ if (i + len < offset << shift) {
+ i += len;
+ continue;
+ }
+
+ /* Skip pages below offset */
+ if (i < offset << shift) {
+ k = (offset << shift) - i;
+ i = offset << shift;
+ } else {
+ k = 0;
+ }
+
+ for (; k < len; k++) {
if (!(i & mask)) {
cur = base + (k << umem_page_shift);
cur |= access_flags;
+ idx = (i >> shift) - offset;
- pas[i >> shift] = cpu_to_be64(cur);
+ pas[idx] = cpu_to_be64(cur);
mlx5_ib_dbg(dev, "pas[%d] 0x%llx\n",
- i >> shift, be64_to_cpu(pas[i >> shift]));
- } else
- mlx5_ib_dbg(dev, "=====> 0x%llx\n",
- base + (k << umem_page_shift));
+ i >> shift, be64_to_cpu(pas[idx]));
+ }
i++;
+
+ /* Stop after num_pages reached */
+ if (i >> shift >= offset + num_pages)
+ return;
}
}
}