Newer platforms have DSS that aren't necessarily available for both geometry and compute, two queries will need to exist. This introduces the first, when passing a valid engine class and engine instance in the flags returns a topology describing geometry.
v2: fix white space errors v3: change flags from hosting 2 8 bit numbers to holding a i915_engine_class_instance struct v4: add error if non rcs engine passed.
Cc: Ashutosh Dixit ashutosh.dixit@intel.com Cc: Matt Roper matthew.d.roper@intel.com Cc: Joonas Lahtinen joonas.lahtinen@linux.intel.com UMD (mesa): https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/14143
Signed-off-by: Matt Atwood matthew.s.atwood@intel.com --- drivers/gpu/drm/i915/i915_query.c | 71 ++++++++++++++++++++++--------- include/uapi/drm/i915_drm.h | 26 +++++++---- 2 files changed, 69 insertions(+), 28 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_query.c b/drivers/gpu/drm/i915/i915_query.c index b5ca00cb6cf6..32be84c95956 100644 --- a/drivers/gpu/drm/i915/i915_query.c +++ b/drivers/gpu/drm/i915/i915_query.c @@ -9,6 +9,7 @@ #include "i915_drv.h" #include "i915_perf.h" #include "i915_query.h" +#include "gt/intel_engine_user.h" #include <uapi/drm/i915_drm.h>
static int copy_query_item(void *query_hdr, size_t query_sz, @@ -28,36 +29,30 @@ static int copy_query_item(void *query_hdr, size_t query_sz, return 0; }
-static int query_topology_info(struct drm_i915_private *dev_priv, - struct drm_i915_query_item *query_item) +static int fill_topology_info(const struct sseu_dev_info *sseu, + struct drm_i915_query_item *query_item, + const u8 *subslice_mask) { - const struct sseu_dev_info *sseu = &to_gt(dev_priv)->info.sseu; struct drm_i915_query_topology_info topo; u32 slice_length, subslice_length, eu_length, total_length; int ret;
- if (query_item->flags != 0) - return -EINVAL; + BUILD_BUG_ON(sizeof(u8) != sizeof(sseu->slice_mask));
if (sseu->max_slices == 0) return -ENODEV;
- BUILD_BUG_ON(sizeof(u8) != sizeof(sseu->slice_mask)); - slice_length = sizeof(sseu->slice_mask); subslice_length = sseu->max_slices * sseu->ss_stride; eu_length = sseu->max_slices * sseu->max_subslices * sseu->eu_stride; total_length = sizeof(topo) + slice_length + subslice_length + eu_length;
- ret = copy_query_item(&topo, sizeof(topo), total_length, - query_item); + ret = copy_query_item(&topo, sizeof(topo), total_length, query_item); + if (ret != 0) return ret;
- if (topo.flags != 0) - return -EINVAL; - memset(&topo, 0, sizeof(topo)); topo.max_slices = sseu->max_slices; topo.max_subslices = sseu->max_subslices; @@ -69,27 +64,64 @@ static int query_topology_info(struct drm_i915_private *dev_priv, topo.eu_stride = sseu->eu_stride;
if (copy_to_user(u64_to_user_ptr(query_item->data_ptr), - &topo, sizeof(topo))) + &topo, sizeof(topo))) return -EFAULT;
if (copy_to_user(u64_to_user_ptr(query_item->data_ptr + sizeof(topo)), - &sseu->slice_mask, slice_length)) + &sseu->slice_mask, slice_length)) return -EFAULT;
if (copy_to_user(u64_to_user_ptr(query_item->data_ptr + - sizeof(topo) + slice_length), - sseu->subslice_mask, subslice_length)) + sizeof(topo) + slice_length), + subslice_mask, subslice_length)) return -EFAULT;
if (copy_to_user(u64_to_user_ptr(query_item->data_ptr + - sizeof(topo) + - slice_length + subslice_length), - sseu->eu_mask, eu_length)) + sizeof(topo) + + slice_length + subslice_length), + sseu->eu_mask, eu_length)) return -EFAULT;
return total_length; }
+static int query_topology_info(struct drm_i915_private *dev_priv, + struct drm_i915_query_item *query_item) +{ + const struct sseu_dev_info *sseu = &to_gt(dev_priv)->info.sseu; + + if (query_item->flags != 0) + return -EINVAL; + + return fill_topology_info(sseu, query_item, sseu->subslice_mask); +} + +static int query_geometry_subslices(struct drm_i915_private *i915, + struct drm_i915_query_item *query_item) +{ + const struct sseu_dev_info *sseu; + struct intel_engine_cs *engine; + struct i915_engine_class_instance classinstance; + + if (GRAPHICS_VER_FULL(i915) < IP_VER(12, 50)) + return -ENODEV; + + classinstance = *((struct i915_engine_class_instance *)&query_item->flags); + + engine = intel_engine_lookup_user(i915, (u8) classinstance.engine_class, + (u8) classinstance.engine_instance); + + if (!engine) + return -EINVAL; + + if (engine->class != RENDER_CLASS) + return -EINVAL; + + sseu = &engine->gt->info.sseu; + + return fill_topology_info(sseu, query_item, sseu->geometry_subslice_mask); +} + static int query_engine_info(struct drm_i915_private *i915, struct drm_i915_query_item *query_item) @@ -508,6 +540,7 @@ static int (* const i915_query_funcs[])(struct drm_i915_private *dev_priv, query_perf_config, query_memregion_info, query_hwconfig_blob, + query_geometry_subslices, };
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 9ab021c4d632..c2a18afcf791 100644 --- a/include/uapi/drm/i915_drm.h +++ b/include/uapi/drm/i915_drm.h @@ -2690,11 +2690,12 @@ struct drm_i915_perf_oa_config { struct drm_i915_query_item { /** @query_id: The id for this query */ __u64 query_id; -#define DRM_I915_QUERY_TOPOLOGY_INFO 1 -#define DRM_I915_QUERY_ENGINE_INFO 2 -#define DRM_I915_QUERY_PERF_CONFIG 3 -#define DRM_I915_QUERY_MEMORY_REGIONS 4 -#define DRM_I915_QUERY_HWCONFIG_BLOB 5 +#define DRM_I915_QUERY_TOPOLOGY_INFO 1 +#define DRM_I915_QUERY_ENGINE_INFO 2 +#define DRM_I915_QUERY_PERF_CONFIG 3 +#define DRM_I915_QUERY_MEMORY_REGIONS 4 +#define DRM_I915_QUERY_HWCONFIG_BLOB 5 +#define DRM_I915_QUERY_GEOMETRY_SUBSLICES 6 /* Must be kept compact -- no holes and well documented */
/** @@ -2718,6 +2719,9 @@ struct drm_i915_query_item { * - DRM_I915_QUERY_PERF_CONFIG_LIST * - DRM_I915_QUERY_PERF_CONFIG_DATA_FOR_UUID * - DRM_I915_QUERY_PERF_CONFIG_FOR_UUID + * + * When query_id == DRM_I915_QUERY_GEOMETRY_SUBSLICES must have a valid + * i915_engine_class_instance struct. */ __u32 flags; #define DRM_I915_QUERY_PERF_CONFIG_LIST 1 @@ -2776,16 +2780,20 @@ struct drm_i915_query { };
/* - * Data written by the kernel with query DRM_I915_QUERY_TOPOLOGY_INFO : + * Data written by the kernel with query DRM_I915_QUERY_TOPOLOGY_INFO, + * DRM_I915_QUERY_GEOMETRY_SUBSLICE: * * data: contains the 3 pieces of information : * - * - the slice mask with one bit per slice telling whether a slice is - * available. The availability of slice X can be queried with the following - * formula : + * - For DRM_I915_QUERY_TOPOLOGY_INFO the slice mask with one bit per slice + * telling whether a slice is available. The availability of slice X can be + * queried with the following formula : * * (data[X / 8] >> (X % 8)) & 1 * + * - For DRM_I915_QUERY_GEOMETRY_SUBSLICES Slices are equal to 1 and this field + * is not used. + * * - the subslice mask for each slice with one bit per subslice telling * whether a subslice is available. Gen12 has dual-subslices, which are * similar to two gen11 subslices. For gen12, this array represents dual-