[RFC v5 2/5] drm/xe/RAS: Register netlink capability

[Aravind Iddamsetty]

Register netlink capability with the DRM and register the driver
callbacks to DRM RAS netlink commands.

v2:
Move the netlink registration parts to DRM susbsytem (Tomer Tayar)

v3: compile only if CONFIG_NET is enabled

Reviewed-by: Michael J. Ruhl <michael.j.ruhl at intel.com> #v2
Signed-off-by: Aravind Iddamsetty <aravind.iddamsetty at linux.intel.com>
---
 drivers/gpu/drm/xe/Makefile          |  2 ++
 drivers/gpu/drm/xe/xe_device.c       |  6 ++++++
 drivers/gpu/drm/xe/xe_device_types.h |  1 +
 drivers/gpu/drm/xe/xe_netlink.c      | 26 ++++++++++++++++++++++++++
 4 files changed, 35 insertions(+)
 create mode 100644 drivers/gpu/drm/xe/xe_netlink.c

diff --git a/drivers/gpu/drm/xe/Makefile b/drivers/gpu/drm/xe/Makefile
index 80eecd35e807..e960c2dbe658 100644
--- a/drivers/gpu/drm/xe/Makefile
+++ b/drivers/gpu/drm/xe/Makefile
@@ -304,6 +304,8 @@ xe-$(CONFIG_DRM_XE_DISPLAY) += \
 	i915-display/skl_universal_plane.o \
 	i915-display/skl_watermark.o
 
+xe-$(CONFIG_NET) += xe_netlink.o
+
 ifeq ($(CONFIG_ACPI),y)
 	xe-$(CONFIG_DRM_XE_DISPLAY) += \
 		i915-display/intel_acpi.o \
diff --git a/drivers/gpu/drm/xe/xe_device.c b/drivers/gpu/drm/xe/xe_device.c
index 806dbdf8118c..ca7a17c16aa5 100644
--- a/drivers/gpu/drm/xe/xe_device.c
+++ b/drivers/gpu/drm/xe/xe_device.c
@@ -363,6 +363,8 @@ static const struct file_operations xe_driver_fops = {
 	.fop_flags = FOP_UNSIGNED_OFFSET,
 };
 
+extern const struct driver_genl_ops xe_genl_ops[];
+
 static struct drm_driver driver = {
 	/* Don't use MTRRs here; the Xserver or userspace app should
 	 * deal with them for Intel hardware.
@@ -381,6 +383,10 @@ static struct drm_driver driver = {
 #ifdef CONFIG_PROC_FS
 	.show_fdinfo = xe_drm_client_fdinfo,
 #endif
+#ifdef CONFIG_NET
+	.genl_ops = xe_genl_ops,
+#endif
+
 	.ioctls = xe_ioctls,
 	.num_ioctls = ARRAY_SIZE(xe_ioctls),
 	.fops = &xe_driver_fops,
diff --git a/drivers/gpu/drm/xe/xe_device_types.h b/drivers/gpu/drm/xe/xe_device_types.h
index 3a851c7a55dd..08d3e53e4b37 100644
--- a/drivers/gpu/drm/xe/xe_device_types.h
+++ b/drivers/gpu/drm/xe/xe_device_types.h
@@ -10,6 +10,7 @@
 
 #include <drm/drm_device.h>
 #include <drm/drm_file.h>
+#include <drm/drm_netlink.h>
 #include <drm/ttm/ttm_device.h>
 
 #include "xe_devcoredump_types.h"
diff --git a/drivers/gpu/drm/xe/xe_netlink.c b/drivers/gpu/drm/xe/xe_netlink.c
new file mode 100644
index 000000000000..9e588fb19631
--- /dev/null
+++ b/drivers/gpu/drm/xe/xe_netlink.c
@@ -0,0 +1,26 @@
+// SPDX-License-Identifier: MIT
+/*
+ * Copyright © 2023 Intel Corporation
+ */
+
+#include <net/genetlink.h>
+#include <uapi/drm/drm_netlink.h>
+
+#include "xe_device.h"
+
+static int xe_genl_list_errors(struct drm_device *drm, struct sk_buff *msg, struct genl_info *info)
+{
+	return 0;
+}
+
+static int xe_genl_read_error(struct drm_device *drm, struct sk_buff *msg, struct genl_info *info)
+{
+	return 0;
+}
+
+/* driver callbacks to DRM netlink commands*/
+const struct driver_genl_ops xe_genl_ops[] = {
+	[DRM_RAS_CMD_QUERY] =		{ .doit = xe_genl_list_errors },
+	[DRM_RAS_CMD_READ_ONE] =	{ .doit = xe_genl_read_error },
+	[DRM_RAS_CMD_READ_ALL] =	{ .doit = xe_genl_list_errors, },
+};
-- 
2.25.1