On 2/7/2024 03:56, Tvrtko Ursulin wrote:
From: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx>
Add a new query to the GuC submission interface version.
Mesa intends to use this information to check for old firmware versions
with a known bug where using the render and compute command streamers
simultaneously can cause GPU hangs due issues in firmware scheduling.
Based on patches from Vivaik and Joonas.
There is a little bit of an open around the width required for versions.
While the GuC FW iface tells they are u8, i915 GuC code uses u32:
#define CSS_SW_VERSION_UC_MAJOR (0xFF << 16)
#define CSS_SW_VERSION_UC_MINOR (0xFF << 8)
#define CSS_SW_VERSION_UC_PATCH (0xFF << 0)
...
struct intel_uc_fw_ver {
u32 major;
u32 minor;
u32 patch;
u32 build;
};
This is copied from generic code which supports firmwares other than
GuC. Only GuC promises to use 8-bit version components. Other firmwares
very definitely do not. There is no open.
So we could make the query u8, and refactor the struct intel_uc_fw_ver
to use u8, or not. To avoid any doubts on why are we assigning u32 to
u8 I simply opted to use u64. Which avoids the need to add any padding
too.
I don't follow how potential 8 vs 32 confusion means jump to 64?!
Compile tested only.
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx>
Cc: Kenneth Graunke <kenneth@xxxxxxxxxxxxx>
Cc: Jose Souza <jose.souza@xxxxxxxxx>
Cc: Sagar Ghuge <sagar.ghuge@xxxxxxxxx>
Cc: Paulo Zanoni <paulo.r.zanoni@xxxxxxxxx>
Cc: John Harrison <John.C.Harrison@xxxxxxxxx>
Cc: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx>
Cc: Jani Nikula <jani.nikula@xxxxxxxxx>
Cc: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx>
Cc: Vivaik Balasubrawmanian <vivaik.balasubrawmanian@xxxxxxxxx>
---
drivers/gpu/drm/i915/i915_query.c | 32 +++++++++++++++++++++++++++++++
include/uapi/drm/i915_drm.h | 11 +++++++++++
2 files changed, 43 insertions(+)
diff --git a/drivers/gpu/drm/i915/i915_query.c b/drivers/gpu/drm/i915/i915_query.c
index 00871ef99792..999687f6a3d4 100644
--- a/drivers/gpu/drm/i915/i915_query.c
+++ b/drivers/gpu/drm/i915/i915_query.c
@@ -551,6 +551,37 @@ static int query_hwconfig_blob(struct drm_i915_private *i915,
return hwconfig->size;
}
+static int
+query_guc_submission_version(struct drm_i915_private *i915,
+ struct drm_i915_query_item *query)
+{
+ struct drm_i915_query_guc_submission_version __user *query_ptr =
+ u64_to_user_ptr(query->data_ptr);
+ struct drm_i915_query_guc_submission_version ver;
+ struct intel_guc *guc = &to_gt(i915)->uc.guc;
+ const size_t size = sizeof(ver);
+ int ret;
+
+ if (!intel_uc_uses_guc_submission(&to_gt(i915)->uc))
+ return -ENODEV;
+
+ ret = copy_query_item(&ver, size, size, query);
+ if (ret != 0)
+ return ret;
+
+ if (ver.major || ver.minor || ver.patch)
+ return -EINVAL;
+
+ ver.major = guc->submission_version.major;
+ ver.minor = guc->submission_version.minor;
+ ver.patch = guc->submission_version.patch;
This needs to include the branch version (currently set to zero) in the
definition. And the UMD needs to barf if branch comes back as non-zero.
I.e. there is no guarantee that a branched version will have the w/a +
fix that they are wanting.
John.
+
+ if (copy_to_user(query_ptr, &ver, 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 +590,7 @@ static int (* const i915_query_funcs[])(struct drm_i915_private *dev_priv,
query_memregion_info,
query_hwconfig_blob,
query_geometry_subslices,
+ query_guc_submission_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 550c496ce76d..d80d9b5e1eda 100644
--- a/include/uapi/drm/i915_drm.h
+++ b/include/uapi/drm/i915_drm.h
@@ -3038,6 +3038,7 @@ 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_GUC_SUBMISSION_VERSION (see struct drm_i915_query_guc_submission_version)
*/
__u64 query_id;
#define DRM_I915_QUERY_TOPOLOGY_INFO 1
@@ -3046,6 +3047,7 @@ 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_GUC_SUBMISSION_VERSION 7
/* Must be kept compact -- no holes and well documented */
/**
@@ -3591,6 +3593,15 @@ struct drm_i915_query_memory_regions {
struct drm_i915_memory_region_info regions[];
};
+/**
+* struct drm_i915_query_guc_submission_version - query GuC submission interface version
+*/
+struct drm_i915_query_guc_submission_version {
+ __u64 major;
+ __u64 minor;
+ __u64 patch;
+};
+
/**
* DOC: GuC HWCONFIG blob uAPI
*
