net/mlx5: Add helper function to release fw page

Factor out the fwp address release page to an helper function, will be
used in the downstream patch.

Signed-off-by: Eran Ben Elisha <eranbe@mellanox.com>
Reviewed-by: Moshe Shemesh <moshe@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/pagealloc.c b/drivers/net/ethernet/mellanox/mlx5/core/pagealloc.c
index 3d6f617..c39907c 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/pagealloc.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/pagealloc.c
@@ -181,25 +181,17 @@ static int alloc_4k(struct mlx5_core_dev *dev, u64 *addr)
 
 #define MLX5_U64_4K_PAGE_MASK ((~(u64)0U) << PAGE_SHIFT)
 
-static void free_4k(struct mlx5_core_dev *dev, u64 addr)
+static void free_fwp(struct mlx5_core_dev *dev, struct fw_page *fwp)
 {
-       struct fw_page *fwp;
-       int n;
+       int n = (fwp->addr & ~MLX5_U64_4K_PAGE_MASK) >> MLX5_ADAPTER_PAGE_SHIFT;
 
-       fwp = find_fw_page(dev, addr & MLX5_U64_4K_PAGE_MASK);
-       if (!fwp) {
-               mlx5_core_warn(dev, "page not found\n");
-               return;
-       }
-
-       n = (addr & ~MLX5_U64_4K_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->device, addr & MLX5_U64_4K_PAGE_MASK,
+               dma_unmap_page(dev->device, fwp->addr & MLX5_U64_4K_PAGE_MASK,
                               PAGE_SIZE, DMA_BIDIRECTIONAL);
                __free_page(fwp->page);
                kfree(fwp);
@@ -208,6 +200,18 @@ static void free_4k(struct mlx5_core_dev *dev, u64 addr)
        }
 }
 
+static void free_addr(struct mlx5_core_dev *dev, u64 addr)
+{
+       struct fw_page *fwp;
+
+       fwp = find_fw_page(dev, addr & MLX5_U64_4K_PAGE_MASK);
+       if (!fwp) {
+               mlx5_core_warn(dev, "page not found\n");
+               return;
+       }
+       free_fwp(dev, fwp);
+}
+
 static int alloc_system_page(struct mlx5_core_dev *dev, u16 func_id)
 {
        struct device *device = dev->device;
@@ -329,7 +333,7 @@ retry:
 
 out_4k:
        for (i--; i >= 0; i--)
-               free_4k(dev, MLX5_GET64(manage_pages_in, in, pas[i]));
+               free_addr(dev, MLX5_GET64(manage_pages_in, in, pas[i]));
 out_free:
        kvfree(in);
        if (notify_fail)
@@ -408,7 +412,7 @@ static int reclaim_pages(struct mlx5_core_dev *dev, u32 func_id, int npages,
        }
 
        for (i = 0; i < num_claimed; i++)
-               free_4k(dev, MLX5_GET64(manage_pages_out, out, pas[i]));
+               free_addr(dev, MLX5_GET64(manage_pages_out, out, pas[i]));
 
        if (nclaimed)
                *nclaimed = num_claimed;