Quoting Tvrtko Ursulin (2024-02-07 13:56:12)
> From: Tvrtko Ursulin <tvrtko.ursu...@intel.com>
>
> 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;
> };
>
> 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.
This a single-shot init time query so I guess u64 is fine too, to keep
the code straightforward.
> Compile tested only.
If Mesa folks confirm this is working for them and after you add link to
the Mesa PR, then you can add my:
Reviewed-by: Joonas Lahtinen <joonas.lahti...@linux.intel.com>
Regards, Joonas
> Signed-off-by: Tvrtko Ursulin <tvrtko.ursu...@intel.com>
> Cc: Kenneth Graunke <kenn...@whitecape.org>
> Cc: Jose Souza <jose.so...@intel.com>
> Cc: Sagar Ghuge <sagar.gh...@intel.com>
> Cc: Paulo Zanoni <paulo.r.zan...@intel.com>
> Cc: John Harrison <john.c.harri...@intel.com>
> Cc: Rodrigo Vivi <rodrigo.v...@intel.com>
> Cc: Jani Nikula <jani.nik...@intel.com>
> Cc: Tvrtko Ursulin <tvrtko.ursu...@intel.com>
> Cc: Vivaik Balasubrawmanian <vivaik.balasubrawman...@intel.com>
> ---
> 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;
> +
> + 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
> *
> --
> 2.40.1
>
