On Mon, Apr 25, 2022 at 11:41:36AM +0100, Tvrtko Ursulin wrote:
On 22/04/2022 20:50, Matt Roper wrote:
We're now ready to start exposing compute engines to userspace.
While we're at it, let's extend the kerneldoc description for the other engine types as well.
Cc: Daniele Ceraolo Spurio daniele.ceraolospurio@intel.com Cc: Tvrtko Ursulin tvrtko.ursulin@linux.intel.com Cc: Vinay Belgaumkar vinay.belgaumkar@intel.com Cc: Jordan Justen jordan.l.justen@intel.com Cc: Szymon Morek szymon.morek@intel.com UMD (mesa): https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/14395 UMD (compute): https://github.com/intel/compute-runtime/pull/451
The compute one points to a commit named "Add compute engine class for xehp" but content of which seems more about engine query, including the yet non-existent distance query (and more)?! I certainly does not appear to be adding a definition of I915_ENGINE_CLASS_COMPUTE. This needs clarifying.
Signed-off-by: Matt Roper matthew.d.roper@intel.com
drivers/gpu/drm/i915/gt/intel_engine_user.c | 2 +- drivers/gpu/drm/i915/gt/intel_gt.c | 1 + drivers/gpu/drm/i915/i915_drm_client.c | 1 + drivers/gpu/drm/i915/i915_drm_client.h | 2 +- include/uapi/drm/i915_drm.h | 62 +++++++++++++++++++-- 5 files changed, 60 insertions(+), 8 deletions(-)
diff --git a/drivers/gpu/drm/i915/gt/intel_engine_user.c b/drivers/gpu/drm/i915/gt/intel_engine_user.c index 0f6cd96b459f..46a174f8aa00 100644 --- a/drivers/gpu/drm/i915/gt/intel_engine_user.c +++ b/drivers/gpu/drm/i915/gt/intel_engine_user.c @@ -47,7 +47,7 @@ static const u8 uabi_classes[] = { [COPY_ENGINE_CLASS] = I915_ENGINE_CLASS_COPY, [VIDEO_DECODE_CLASS] = I915_ENGINE_CLASS_VIDEO, [VIDEO_ENHANCEMENT_CLASS] = I915_ENGINE_CLASS_VIDEO_ENHANCE,
- /* TODO: Add COMPUTE_CLASS mapping once ABI is available */
- [COMPUTE_CLASS] = I915_ENGINE_CLASS_COMPUTE, }; static int engine_cmp(void *priv, const struct list_head *A,
diff --git a/drivers/gpu/drm/i915/gt/intel_gt.c b/drivers/gpu/drm/i915/gt/intel_gt.c index 92394f13b42f..c96e123496a5 100644 --- a/drivers/gpu/drm/i915/gt/intel_gt.c +++ b/drivers/gpu/drm/i915/gt/intel_gt.c @@ -1175,6 +1175,7 @@ void intel_gt_invalidate_tlbs(struct intel_gt *gt) [VIDEO_DECODE_CLASS] = GEN12_VD_TLB_INV_CR, [VIDEO_ENHANCEMENT_CLASS] = GEN12_VE_TLB_INV_CR, [COPY_ENGINE_CLASS] = GEN12_BLT_TLB_INV_CR,
[COMPUTE_CLASS] = GEN12_GFX_TLB_INV_CR,Do you know what 0xcf04 is?
The mmio 0xcf04 is the one we should use for compute class. And the context bit in 0xcf04 represents engine instance.
GEN12_GFX_TLB_INV_CR is for render class.
Thanks, Prathap
Or if GEN12_GFX_TLB_INV_CR is correct then I think get_reg_and_bit() might need adjusting to always select bit 0 for any compute engine instance. Not sure how hardware would behave if value other than '1' would be written into 0xced8.
Regards,
Tvrtko
}; struct drm_i915_private *i915 = gt->i915; struct intel_uncore *uncore = gt->uncore; diff --git a/drivers/gpu/drm/i915/i915_drm_client.c b/drivers/gpu/drm/i915/i915_drm_client.c index 475a6f824cad..18d38cb59923 100644 --- a/drivers/gpu/drm/i915/i915_drm_client.c +++ b/drivers/gpu/drm/i915/i915_drm_client.c @@ -81,6 +81,7 @@ static const char * const uabi_class_names[] = { [I915_ENGINE_CLASS_COPY] = "copy", [I915_ENGINE_CLASS_VIDEO] = "video", [I915_ENGINE_CLASS_VIDEO_ENHANCE] = "video-enhance",
- [I915_ENGINE_CLASS_COMPUTE] = "compute", }; static u64 busy_add(struct i915_gem_context *ctx, unsigned int class)
diff --git a/drivers/gpu/drm/i915/i915_drm_client.h b/drivers/gpu/drm/i915/i915_drm_client.h index 5f5b02b01ba0..f796c5e8e060 100644 --- a/drivers/gpu/drm/i915/i915_drm_client.h +++ b/drivers/gpu/drm/i915/i915_drm_client.h @@ -13,7 +13,7 @@ #include "gt/intel_engine_types.h" -#define I915_LAST_UABI_ENGINE_CLASS I915_ENGINE_CLASS_VIDEO_ENHANCE +#define I915_LAST_UABI_ENGINE_CLASS I915_ENGINE_CLASS_COMPUTE struct drm_i915_private; diff --git a/include/uapi/drm/i915_drm.h b/include/uapi/drm/i915_drm.h index 35ca528803fd..a2def7b27009 100644 --- a/include/uapi/drm/i915_drm.h +++ b/include/uapi/drm/i915_drm.h @@ -154,21 +154,71 @@ enum i915_mocs_table_index { I915_MOCS_CACHED, }; -/* +/**
- enum drm_i915_gem_engine_class - uapi engine type enumeration
- Different engines serve different roles, and there may be more than one
- engine serving each role. enum drm_i915_gem_engine_class provides a
- classification of the role of the engine, which may be used when requesting
- operations to be performed on a certain subset of engines, or for providing
- information about that group.
- engine serving each role. This enum provides a classification of the role
- of the engine, which may be used when requesting operations to be performed
- on a certain subset of engines, or for providing information about that
*/ enum drm_i915_gem_engine_class {
- group.
- /**
* @I915_ENGINE_CLASS_RENDER:** Render engines support instructions used for 3D, Compute (GPGPU),* and programmable media workloads. These instructions fetch data and* dispatch individual work items to threads that operate in parallel.* The threads run small programs (called "kernels" or "shaders") on* the GPU's execution units (EUs).*/- /**
* @I915_ENGINE_CLASS_COPY:** Copy engines (also referred to as "blitters") support instructions* that move blocks of data from one location in memory to another,* or that fill a specified location of memory with fixed data.* Copy engines can perform pre-defined logical or bitwise operations* on the source, destination, or pattern data.*/- /**
* @I915_ENGINE_CLASS_VIDEO:** Video engines (also referred to as "bit stream decode" (BSD) or* "vdbox") support instructions that perform fixed-function media* decode and encode.*/- /**
* @I915_ENGINE_CLASS_VIDEO_ENHANCE:** Video enhancement engines (also referred to as "vebox") support* instructions related to image enhancement.*/
- /* should be kept compact */
- /**
* @I915_ENGINE_CLASS_COMPUTE:** Compute engines support a subset of the instructions available* on render engines: compute engines support Compute (GPGPU) and* programmable media workloads, but do not support the 3D pipeline.*/- I915_ENGINE_CLASS_COMPUTE = 4,
- /* Values in this enum should be kept compact. */
- /**
* @I915_ENGINE_CLASS_INVALID:** Placeholder value to represent an invalid engine class assignment.*/