On 27/09/2023 05:14, Balasubrawmanian, Vivaik wrote:
Due to a bug in GuC firmware, Mesa can't enable by default the usage of
compute engines in DG2 and newer.
A new GuC firmware fixed the issue but until now there was no way
for Mesa to know if KMD was running with the fixed GuC version or not,
so this uAPI is required.
Is the firmware bug making the ccs engines generally useless, or just
not suitable for this specific Mesa use case?
It may be expanded in future to query other firmware versions too.
More information:
https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/23661
Mesa usage: https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/25233
Cc: John Harrison <John.C.Harrison@xxxxxxxxx>
Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio@xxxxxxxxx>
Cc: José Roberto de Souza <jose.souza@xxxxxxxxx>
Signed-off-by: Vivaik Balasubrawmanian <vivaik.balasubrawmanian@xxxxxxxxx>
---
drivers/gpu/drm/i915/i915_query.c | 47 +++++++++++++++++++++++++++++++
include/uapi/drm/i915_drm.h | 32 +++++++++++++++++++++
2 files changed, 79 insertions(+)
diff --git a/drivers/gpu/drm/i915/i915_query.c
b/drivers/gpu/drm/i915/i915_query.c
index 00871ef99792..7f22a49faae7 100644
--- a/drivers/gpu/drm/i915/i915_query.c
+++ b/drivers/gpu/drm/i915/i915_query.c
@@ -551,6 +551,52 @@ static int query_hwconfig_blob(struct
drm_i915_private *i915,
return hwconfig->size;
}
+static int
+query_uc_fw_version(struct drm_i915_private *i915, struct
drm_i915_query_item *query)
+{
+ struct drm_i915_query_uc_fw_version __user *query_ptr =
u64_to_user_ptr(query->data_ptr);
+ size_t size = sizeof(struct drm_i915_query_uc_fw_version);
+ struct drm_i915_query_uc_fw_version resp;
+
+ if (query->length == 0) {
+ query->length = size;
+ return 0;
+ } else if (query->length != size) {
+ drm_dbg(&i915->drm,
+ "Invalid uc_fw_version query item size=%u expected=%zu\n",
+ query->length, size);
+ return -EINVAL;
+ }
+
+ if (copy_from_user(&resp, query_ptr, size))
+ return -EFAULT;
The above can probably be replaced by using the copy_query_item() helper
and it would work a bit better even since no reason to reject a buffer
too large.
+
+ if (resp.pad || resp.pad2 || resp.reserved) {
+ drm_dbg(&i915->drm,
+ "Invalid input fw version query structure parameters
received");
+ return -EINVAL;
+ }
+
+ switch (resp.uc_type) {
+ case I915_QUERY_UC_TYPE_GUC: {
+ struct intel_guc *guc = &i915->gt0.uc.guc;
+
+ resp.major_ver = guc->submission_version.major;
+ resp.minor_ver = guc->submission_version.minor;
+ resp.patch_ver = guc->submission_version.patch;
Submission version is not the same as fw version, right? So
DRM_I915_QUERY_UC_FW_VERSION and uapi kerneldoc is misleading.
Name the query type I915_QUERY_UC_TYPE_GUC*_SUBMISSION* and make it clear?
Regards,
Tvrtko
+ resp.branch_ver = 0;
+ break;
+ }
+ default:
+ return -EINVAL;
+ }
+
+ if (copy_to_user(query_ptr, &resp, size))
+ return -EFAULT;
+
+ return 0;
+}
+
static int (* const i915_query_funcs[])(struct drm_i915_private
*dev_priv,
struct drm_i915_query_item *query_item) = {
query_topology_info,
@@ -559,6 +605,7 @@ static int (* const i915_query_funcs[])(struct
drm_i915_private *dev_priv,
query_memregion_info,
query_hwconfig_blob,
query_geometry_subslices,
+ query_uc_fw_version,
};
int i915_query_ioctl(struct drm_device *dev, void *data, struct
drm_file *file)
diff --git a/include/uapi/drm/i915_drm.h b/include/uapi/drm/i915_drm.h
index 7000e5910a1d..9be241fb77d8 100644
--- a/include/uapi/drm/i915_drm.h
+++ b/include/uapi/drm/i915_drm.h
@@ -3013,6 +3013,7 @@ struct drm_i915_query_item {
* - %DRM_I915_QUERY_MEMORY_REGIONS (see struct
drm_i915_query_memory_regions)
* - %DRM_I915_QUERY_HWCONFIG_BLOB (see `GuC HWCONFIG blob uAPI`)
* - %DRM_I915_QUERY_GEOMETRY_SUBSLICES (see struct
drm_i915_query_topology_info)
+ * - %DRM_I915_QUERY_UC_FW_VERSION (see struct
drm_i915_query_uc_fw_version)
*/
__u64 query_id;
#define DRM_I915_QUERY_TOPOLOGY_INFO 1
@@ -3021,6 +3022,7 @@ struct drm_i915_query_item {
#define DRM_I915_QUERY_MEMORY_REGIONS 4
#define DRM_I915_QUERY_HWCONFIG_BLOB 5
#define DRM_I915_QUERY_GEOMETRY_SUBSLICES 6
+#define DRM_I915_QUERY_UC_FW_VERSION 7
/* Must be kept compact -- no holes and well documented */
/**
@@ -3213,6 +3215,36 @@ struct drm_i915_query_topology_info {
__u8 data[];
};
+/**
+* struct drm_i915_query_uc_fw_version - query a micro-controller
firmware version
+*
+* Given a uc_type this will return the major, minor, patch and branch
version
+* of the micro-controller firmware.
+*/
+struct drm_i915_query_uc_fw_version {
+ /** @uc: The micro-controller type to query firmware version */
+#define I915_QUERY_UC_TYPE_GUC 0
+ __u16 uc_type;
+
+ /** @pad: MBZ */
+ __u16 pad;
+
+ /* @major_ver: major uc fw version */
+ __u32 major_ver;
+ /* @minor_ver: minor uc fw version */
+ __u32 minor_ver;
+ /* @patch_ver: patch uc fw version */
+ __u32 patch_ver;
+ /* @branch_ver: branch uc fw version */
+ __u32 branch_ver;
+
+ /** @pad2: MBZ */
+ __u32 pad2;
+
+ /** @reserved: Reserved */
+ __u64 reserved;
+};
+
/**
* DOC: Engine Discovery uAPI
*
base-commit: a42554bf0755b80fdfb8e91ca35ae6835bb3534d
