IB/mlx5: Set uid as part of XRCD commands

Set uid as part of XRCD commands so that the firmware can manage the
XRCD object in a secured way.

That will enable using an XRCD that was created by verbs application
to be used by the DEVX flow in case the uid is equal.

Signed-off-by: Yishai Hadas <yishaih@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

drivers/infiniband/hw/mlx5/cmd.c

@@ -271,3 +271,28 @@ int mlx5_cmd_detach_mcg(struct mlx5_core_dev *dev, union ib_gid *mgid,
 	memcpy(gid, mgid, sizeof(*mgid));
 	return mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out));
 }
+
+int mlx5_cmd_xrcd_alloc(struct mlx5_core_dev *dev, u32 *xrcdn, u16 uid)
+{
+	u32 out[MLX5_ST_SZ_DW(alloc_xrcd_out)] = {};
+	u32 in[MLX5_ST_SZ_DW(alloc_xrcd_in)]   = {};
+	int err;
+
+	MLX5_SET(alloc_xrcd_in, in, opcode, MLX5_CMD_OP_ALLOC_XRCD);
+	MLX5_SET(alloc_xrcd_in, in, uid, uid);
+	err = mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out));
+	if (!err)
+		*xrcdn = MLX5_GET(alloc_xrcd_out, out, xrcd);
+	return err;
+}
+
+int mlx5_cmd_xrcd_dealloc(struct mlx5_core_dev *dev, u32 xrcdn, u16 uid)
+{
+	u32 out[MLX5_ST_SZ_DW(dealloc_xrcd_out)] = {};
+	u32 in[MLX5_ST_SZ_DW(dealloc_xrcd_in)]   = {};
+
+	MLX5_SET(dealloc_xrcd_in, in, opcode, MLX5_CMD_OP_DEALLOC_XRCD);
+	MLX5_SET(dealloc_xrcd_in, in, xrcd, xrcdn);
+	MLX5_SET(dealloc_xrcd_in, in, uid, uid);
+	return mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out));
+}

drivers/infiniband/hw/mlx5/cmd.h

@@ -55,4 +55,6 @@ int mlx5_cmd_attach_mcg(struct mlx5_core_dev *dev, union ib_gid *mgid,
 			u32 qpn, u16 uid);
 int mlx5_cmd_detach_mcg(struct mlx5_core_dev *dev, union ib_gid *mgid,
 			u32 qpn, u16 uid);
+int mlx5_cmd_xrcd_alloc(struct mlx5_core_dev *dev, u32 *xrcdn, u16 uid);
+int mlx5_cmd_xrcd_dealloc(struct mlx5_core_dev *dev, u32 xrcdn, u16 uid);
 #endif /* MLX5_IB_CMD_H */

drivers/infiniband/hw/mlx5/mlx5_ib.h

@@ -539,6 +539,7 @@ struct mlx5_ib_srq {
 struct mlx5_ib_xrcd {
 	struct ib_xrcd		ibxrcd;
 	u32			xrcdn;
+	u16			uid;
 };
 
 enum mlx5_ib_mtt_access_flags {

drivers/infiniband/hw/mlx5/qp.c

@@ -5280,6 +5280,7 @@ struct ib_xrcd *mlx5_ib_alloc_xrcd(struct ib_device *ibdev,
 	struct mlx5_ib_dev *dev = to_mdev(ibdev);
 	struct mlx5_ib_xrcd *xrcd;
 	int err;
+	u16 uid;
 
 	if (!MLX5_CAP_GEN(dev->mdev, xrc))
 		return ERR_PTR(-ENOSYS);
@@ -5288,22 +5289,25 @@ struct ib_xrcd *mlx5_ib_alloc_xrcd(struct ib_device *ibdev,
 	if (!xrcd)
 		return ERR_PTR(-ENOMEM);
 
-	err = mlx5_core_xrcd_alloc(dev->mdev, &xrcd->xrcdn);
+	uid = context ? to_mucontext(context)->devx_uid : 0;
+	err = mlx5_cmd_xrcd_alloc(dev->mdev, &xrcd->xrcdn, uid);
 	if (err) {
 		kfree(xrcd);
 		return ERR_PTR(-ENOMEM);
 	}
 
+	xrcd->uid = uid;
 	return &xrcd->ibxrcd;
 }
 
 int mlx5_ib_dealloc_xrcd(struct ib_xrcd *xrcd)
 {
 	struct mlx5_ib_dev *dev = to_mdev(xrcd->device);
 	u32 xrcdn = to_mxrcd(xrcd)->xrcdn;
+	u16 uid =  to_mxrcd(xrcd)->uid;
 	int err;
 
-	err = mlx5_core_xrcd_dealloc(dev->mdev, xrcdn);
+	err = mlx5_cmd_xrcd_dealloc(dev->mdev, xrcdn, uid);
 	if (err)
 		mlx5_ib_warn(dev, "failed to dealloc xrcdn 0x%x\n", xrcdn);