[Intel-xe] [RFC v2 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)

Cc: Tomer Tayar <ttayar at habana.ai>
Signed-off-by: Aravind Iddamsetty <aravind.iddamsetty at linux.intel.com>
---
 drivers/gpu/drm/xe/Makefile          |  1 +
 drivers/gpu/drm/xe/xe_device.c       |  6 +++++-
 drivers/gpu/drm/xe/xe_device_types.h |  1 +
 drivers/gpu/drm/xe/xe_netlink.c      | 22 ++++++++++++++++++++++
 4 files changed, 29 insertions(+), 1 deletion(-)
 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 b84e191ba14f..2b42165bc824 100644
--- a/drivers/gpu/drm/xe/Makefile
+++ b/drivers/gpu/drm/xe/Makefile
@@ -67,6 +67,7 @@ xe-y += xe_bb.o \
 	xe_mmio.o \
 	xe_mocs.o \
 	xe_module.o \
+	xe_netlink.o \
 	xe_pat.o \
 	xe_pci.o \
 	xe_pcode.o \
diff --git a/drivers/gpu/drm/xe/xe_device.c b/drivers/gpu/drm/xe/xe_device.c
index 323356a44e7f..42a3b50069b6 100644
--- a/drivers/gpu/drm/xe/xe_device.c
+++ b/drivers/gpu/drm/xe/xe_device.c
@@ -124,6 +124,8 @@ static void xe_driver_release(struct drm_device *dev)
 	pci_set_drvdata(to_pci_dev(xe->drm.dev), NULL);
 }
 
+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.
@@ -131,7 +133,8 @@ static struct drm_driver driver = {
 	.driver_features =
 	    DRIVER_GEM |
 	    DRIVER_RENDER | DRIVER_SYNCOBJ |
-	    DRIVER_SYNCOBJ_TIMELINE,
+	    DRIVER_SYNCOBJ_TIMELINE |
+	    DRIVER_NETLINK,
 	.open = xe_file_open,
 	.postclose = xe_file_close,
 
@@ -143,6 +146,7 @@ static struct drm_driver driver = {
 	.dumb_create = xe_bo_dumb_create,
 	.dumb_map_offset = drm_gem_ttm_dumb_map_offset,
 	.release = &xe_driver_release,
+	.genl_ops = xe_genl_ops,
 
 	.ioctls = xe_ioctls,
 	.num_ioctls = ARRAY_SIZE(xe_ioctls),
diff --git a/drivers/gpu/drm/xe/xe_device_types.h b/drivers/gpu/drm/xe/xe_device_types.h
index 682ebdd1c09e..b19053fb3130 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_gt_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..81d785455632
--- /dev/null
+++ b/drivers/gpu/drm/xe/xe_netlink.c
@@ -0,0 +1,22 @@
+// SPDX-License-Identifier: MIT
+/*
+ * Copyright © 2023 Intel Corporation
+ */
+#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