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mlx5_core: Fix PowerPC support

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1. Fix derivation of sub-page index from the dma address in free_4k.
2. Fix the DMA address passed to dma_unmap_page by masking it properly.

Signed-off-by: Eli Cohen <eli@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
This commit is contained in:
Eli Cohen 2014-01-14 17:45:20 +02:00 • committed by Roland Dreier
parent db81a5c374
commit 05bdb2ab6b
2 changed files with 7 additions and 5 deletions
drivers/net/ethernet/mellanox/mlx5/core
pagealloc.c
include/linux/mlx5
device.h

9
drivers/net/ethernet/mellanox/mlx5/core/pagealloc.c
View file

@ -99,7 +99,7 @@ enum {
enum {
MLX5_MAX_RECLAIM_TIME_MILI = 5000,
MLX5_NUM_4K_IN_PAGE = PAGE_SIZE / 4096,
MLX5_NUM_4K_IN_PAGE = PAGE_SIZE / MLX5_ADAPTER_PAGE_SIZE,
};
static int insert_page(struct mlx5_core_dev *dev, u64 addr, struct page *page, u16 func_id)
@ -206,7 +206,7 @@ static int alloc_4k(struct mlx5_core_dev *dev, u64 *addr)
if (!fp->free_count)
list_del(&fp->list);
*addr = fp->addr + n * 4096;
*addr = fp->addr + n * MLX5_ADAPTER_PAGE_SIZE;
return 0;
}
@ -222,14 +222,15 @@ static void free_4k(struct mlx5_core_dev *dev, u64 addr)
return;
}
n = (addr & ~PAGE_MASK) % 4096;
n = (addr & ~PAGE_MASK) >> MLX5_ADAPTER_PAGE_SHIFT;
fwp->free_count++;
set_bit(n, &fwp->bitmask);
if (fwp->free_count == MLX5_NUM_4K_IN_PAGE) {
rb_erase(&fwp->rb_node, &dev->priv.page_root);
if (fwp->free_count != 1)
list_del(&fwp->list);
dma_unmap_page(&dev->pdev->dev, addr, PAGE_SIZE, DMA_BIDIRECTIONAL);
dma_unmap_page(&dev->pdev->dev, addr & PAGE_MASK, PAGE_SIZE,
DMA_BIDIRECTIONAL);
__free_page(fwp->page);
kfree(fwp);
} else if (fwp->free_count == 1) {

3
include/linux/mlx5/device.h
View file

@ -234,7 +234,8 @@ enum {
};
enum {
MLX5_ADAPTER_PAGE_SHIFT = 12
MLX5_ADAPTER_PAGE_SHIFT = 12,
MLX5_ADAPTER_PAGE_SIZE = 1 << MLX5_ADAPTER_PAGE_SHIFT,
};
enum {