mlx4: Implement memory windows allocation and deallocation
Implement MW allocation and deallocation in mlx4_core and mlx4_ib.
Pass down the enable bind flag when registering memory regions.
Signed-off-by: Haggai Eran <haggaie@mellanox.com>
Signed-off-by: Shani Michaeli <shanim@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
diff --git a/drivers/infiniband/hw/mlx4/mr.c b/drivers/infiniband/hw/mlx4/mr.c
index 254e1cf..5adf4c4 100644
--- a/drivers/infiniband/hw/mlx4/mr.c
+++ b/drivers/infiniband/hw/mlx4/mr.c
@@ -41,9 +41,19 @@
(acc & IB_ACCESS_REMOTE_WRITE ? MLX4_PERM_REMOTE_WRITE : 0) |
(acc & IB_ACCESS_REMOTE_READ ? MLX4_PERM_REMOTE_READ : 0) |
(acc & IB_ACCESS_LOCAL_WRITE ? MLX4_PERM_LOCAL_WRITE : 0) |
+ (acc & IB_ACCESS_MW_BIND ? MLX4_PERM_BIND_MW : 0) |
MLX4_PERM_LOCAL_READ;
}
+static enum mlx4_mw_type to_mlx4_type(enum ib_mw_type type)
+{
+ switch (type) {
+ case IB_MW_TYPE_1: return MLX4_MW_TYPE_1;
+ case IB_MW_TYPE_2: return MLX4_MW_TYPE_2;
+ default: return -1;
+ }
+}
+
struct ib_mr *mlx4_ib_get_dma_mr(struct ib_pd *pd, int acc)
{
struct mlx4_ib_mr *mr;
@@ -189,6 +199,48 @@
return 0;
}
+struct ib_mw *mlx4_ib_alloc_mw(struct ib_pd *pd, enum ib_mw_type type)
+{
+ struct mlx4_ib_dev *dev = to_mdev(pd->device);
+ struct mlx4_ib_mw *mw;
+ int err;
+
+ mw = kmalloc(sizeof(*mw), GFP_KERNEL);
+ if (!mw)
+ return ERR_PTR(-ENOMEM);
+
+ err = mlx4_mw_alloc(dev->dev, to_mpd(pd)->pdn,
+ to_mlx4_type(type), &mw->mmw);
+ if (err)
+ goto err_free;
+
+ err = mlx4_mw_enable(dev->dev, &mw->mmw);
+ if (err)
+ goto err_mw;
+
+ mw->ibmw.rkey = mw->mmw.key;
+
+ return &mw->ibmw;
+
+err_mw:
+ mlx4_mw_free(dev->dev, &mw->mmw);
+
+err_free:
+ kfree(mw);
+
+ return ERR_PTR(err);
+}
+
+int mlx4_ib_dealloc_mw(struct ib_mw *ibmw)
+{
+ struct mlx4_ib_mw *mw = to_mmw(ibmw);
+
+ mlx4_mw_free(to_mdev(ibmw->device)->dev, &mw->mmw);
+ kfree(mw);
+
+ return 0;
+}
+
struct ib_mr *mlx4_ib_alloc_fast_reg_mr(struct ib_pd *pd,
int max_page_list_len)
{