diff mbox series

[mlx5-next,1/4] net/mlx5: Support setting access rights of dma addresses

Message ID 20200715042835.32851-2-saeedm@mellanox.com
State Awaiting Upstream
Delegated to: David Miller
Headers show
Series mlx5 next updates 2020-07-14 | expand

Commit Message

Saeed Mahameed July 15, 2020, 4:28 a.m. UTC 
From: Eli Cohen <eli@mellanox.com>

mlx5_fill_page_frag_array() is used to populate dma addresses to
resources that require it, such as QPs, RQs etc. When the resource is
used, PA list permissions are ignored. For resources that use MTT list,
the user is required to provide the access rights. Subsequent patches
use resources that require MTT lists, so modify API and implementation
to support that.

Signed-off-by: Eli Cohen <eli@mellanox.com>
Reviewed-by: Parav Pandit <parav@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
---
 drivers/net/ethernet/mellanox/mlx5/core/alloc.c | 11 +++++++++--
 include/linux/mlx5/driver.h                     |  1 +
 include/linux/mlx5/mlx5_ifc.h                   |  6 ++++++
 3 files changed, 16 insertions(+), 2 deletions(-)
diff mbox series

Patch

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/alloc.c b/drivers/net/ethernet/mellanox/mlx5/core/alloc.c
index 42198e64a7f49..8db4b5f0f963b 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/alloc.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/alloc.c
@@ -299,11 +299,18 @@  void mlx5_fill_page_array(struct mlx5_frag_buf *buf, __be64 *pas)
 }
 EXPORT_SYMBOL_GPL(mlx5_fill_page_array);
 
-void mlx5_fill_page_frag_array(struct mlx5_frag_buf *buf, __be64 *pas)
+void mlx5_fill_page_frag_array_perm(struct mlx5_frag_buf *buf, __be64 *pas, u8 perm)
 {
 	int i;
 
+	WARN_ON(perm & 0xfc);
 	for (i = 0; i < buf->npages; i++)
-		pas[i] = cpu_to_be64(buf->frags[i].map);
+		pas[i] = cpu_to_be64(buf->frags[i].map | perm);
+}
+EXPORT_SYMBOL_GPL(mlx5_fill_page_frag_array_perm);
+
+void mlx5_fill_page_frag_array(struct mlx5_frag_buf *buf, __be64 *pas)
+{
+	mlx5_fill_page_frag_array_perm(buf, pas, 0);
 }
 EXPORT_SYMBOL_GPL(mlx5_fill_page_frag_array);
diff --git a/include/linux/mlx5/driver.h b/include/linux/mlx5/driver.h
index 13c0e4556eda9..f2557d7e1355c 100644
--- a/include/linux/mlx5/driver.h
+++ b/include/linux/mlx5/driver.h
@@ -971,6 +971,7 @@  void mlx5_register_debugfs(void);
 void mlx5_unregister_debugfs(void);
 
 void mlx5_fill_page_array(struct mlx5_frag_buf *buf, __be64 *pas);
+void mlx5_fill_page_frag_array_perm(struct mlx5_frag_buf *buf, __be64 *pas, u8 perm);
 void mlx5_fill_page_frag_array(struct mlx5_frag_buf *frag_buf, __be64 *pas);
 int mlx5_vector2eqn(struct mlx5_core_dev *dev, int vector, int *eqn,
 		    unsigned int *irqn);
diff --git a/include/linux/mlx5/mlx5_ifc.h b/include/linux/mlx5/mlx5_ifc.h
index 3786888cb1bac..5890e5c9da779 100644
--- a/include/linux/mlx5/mlx5_ifc.h
+++ b/include/linux/mlx5/mlx5_ifc.h
@@ -10653,4 +10653,10 @@  struct mlx5_ifc_tls_progress_params_bits {
 	u8         hw_offset_record_number[0x18];
 };
 
+enum {
+	MLX5_MTT_PERM_READ	= 1 << 0,
+	MLX5_MTT_PERM_WRITE	= 1 << 1,
+	MLX5_MTT_PERM_RW	= MLX5_MTT_PERM_READ | MLX5_MTT_PERM_WRITE,
+};
+
 #endif /* MLX5_IFC_H */