On Wed, Jun 02, 2021 at 10:16:30PM -0700, Matthew Brost wrote:
> From: Daniele Ceraolo Spurio <daniele.ceraolospu...@intel.com>
>
> GuC has its own defines for the engine classes. They're currently
> mapping 1:1 to the defines used by the driver, but there is no guarantee
> this will continue in the future. Given that we've been caught off-guard
> in the past by similar divergences, we can prepare for the changes by
> introducing helper functions to convert from engine class to GuC class and
> back again.
>
> Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospu...@intel.com>
> Signed-off-by: Matthew Brost <matthew.br...@intel.com>
> Reviewed-by: Matthew Brost <matthew.br...@intel.com>
> Cc: John Harrison <john.c.harri...@intel.com>
> Cc: Michal Wajdeczko <michal.wajdec...@intel.com>
Applied all up to this, except the Kconfig one.
Thanks, Daniel
> ---
> drivers/gpu/drm/i915/gt/intel_engine_cs.c | 6 +++--
> drivers/gpu/drm/i915/gt/uc/intel_guc_ads.c | 20 +++++++++-------
> drivers/gpu/drm/i915/gt/uc/intel_guc_fwif.h | 26 +++++++++++++++++++++
> 3 files changed, 42 insertions(+), 10 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/gt/intel_engine_cs.c
> b/drivers/gpu/drm/i915/gt/intel_engine_cs.c
> index 3f9a811eb02b..69281b5aba51 100644
> --- a/drivers/gpu/drm/i915/gt/intel_engine_cs.c
> +++ b/drivers/gpu/drm/i915/gt/intel_engine_cs.c
> @@ -265,6 +265,7 @@ static int intel_engine_setup(struct intel_gt *gt, enum
> intel_engine_id id)
> const struct engine_info *info = &intel_engines[id];
> struct drm_i915_private *i915 = gt->i915;
> struct intel_engine_cs *engine;
> + u8 guc_class;
>
> BUILD_BUG_ON(MAX_ENGINE_CLASS >= BIT(GEN11_ENGINE_CLASS_WIDTH));
> BUILD_BUG_ON(MAX_ENGINE_INSTANCE >= BIT(GEN11_ENGINE_INSTANCE_WIDTH));
> @@ -293,9 +294,10 @@ static int intel_engine_setup(struct intel_gt *gt, enum
> intel_engine_id id)
> engine->i915 = i915;
> engine->gt = gt;
> engine->uncore = gt->uncore;
> - engine->mmio_base = __engine_mmio_base(i915, info->mmio_bases);
> engine->hw_id = info->hw_id;
> - engine->guc_id = MAKE_GUC_ID(info->class, info->instance);
> + guc_class = engine_class_to_guc_class(info->class);
> + engine->guc_id = MAKE_GUC_ID(guc_class, info->instance);
> + engine->mmio_base = __engine_mmio_base(i915, info->mmio_bases);
>
> engine->irq_handler = nop_irq_handler;
>
> diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_ads.c
> b/drivers/gpu/drm/i915/gt/uc/intel_guc_ads.c
> index 17526717368c..efdce309b6f1 100644
> --- a/drivers/gpu/drm/i915/gt/uc/intel_guc_ads.c
> +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_ads.c
> @@ -6,6 +6,7 @@
> #include "gt/intel_gt.h"
> #include "gt/intel_lrc.h"
> #include "intel_guc_ads.h"
> +#include "intel_guc_fwif.h"
> #include "intel_uc.h"
> #include "i915_drv.h"
>
> @@ -104,7 +105,7 @@ static void guc_mapping_table_init(struct intel_gt *gt,
> GUC_MAX_INSTANCES_PER_CLASS;
>
> for_each_engine(engine, gt, id) {
> - u8 guc_class = engine->class;
> + u8 guc_class = engine_class_to_guc_class(engine->class);
>
> system_info->mapping_table[guc_class][engine->instance] =
> engine->instance;
> @@ -124,7 +125,7 @@ static void __guc_ads_init(struct intel_guc *guc)
> struct __guc_ads_blob *blob = guc->ads_blob;
> const u32 skipped_size = LRC_PPHWSP_SZ * PAGE_SIZE + LR_HW_CONTEXT_SIZE;
> u32 base;
> - u8 engine_class;
> + u8 engine_class, guc_class;
>
> /* GuC scheduling policies */
> guc_policies_init(&blob->policies);
> @@ -140,22 +141,25 @@ static void __guc_ads_init(struct intel_guc *guc)
> for (engine_class = 0; engine_class <= MAX_ENGINE_CLASS;
> ++engine_class) {
> if (engine_class == OTHER_CLASS)
> continue;
> +
> + guc_class = engine_class_to_guc_class(engine_class);
> +
> /*
> * TODO: Set context pointer to default state to allow
> * GuC to re-init guilty contexts after internal reset.
> */
> - blob->ads.golden_context_lrca[engine_class] = 0;
> - blob->ads.eng_state_size[engine_class] =
> + blob->ads.golden_context_lrca[guc_class] = 0;
> + blob->ads.eng_state_size[guc_class] =
> intel_engine_context_size(guc_to_gt(guc),
> engine_class) -
> skipped_size;
> }
>
> /* System info */
> - blob->system_info.engine_enabled_masks[RENDER_CLASS] = 1;
> - blob->system_info.engine_enabled_masks[COPY_ENGINE_CLASS] = 1;
> - blob->system_info.engine_enabled_masks[VIDEO_DECODE_CLASS] =
> VDBOX_MASK(gt);
> - blob->system_info.engine_enabled_masks[VIDEO_ENHANCEMENT_CLASS] =
> VEBOX_MASK(gt);
> + blob->system_info.engine_enabled_masks[GUC_RENDER_CLASS] = 1;
> + blob->system_info.engine_enabled_masks[GUC_BLITTER_CLASS] = 1;
> + blob->system_info.engine_enabled_masks[GUC_VIDEO_CLASS] =
> VDBOX_MASK(gt);
> + blob->system_info.engine_enabled_masks[GUC_VIDEOENHANCE_CLASS] =
> VEBOX_MASK(gt);
>
>
> blob->system_info.generic_gt_sysinfo[GUC_GENERIC_GT_SYSINFO_SLICE_ENABLED] =
> hweight8(gt->info.sseu.slice_mask);
> diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_fwif.h
> b/drivers/gpu/drm/i915/gt/uc/intel_guc_fwif.h
> index 9bf35240e723..e9a9d85e2aa3 100644
> --- a/drivers/gpu/drm/i915/gt/uc/intel_guc_fwif.h
> +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_fwif.h
> @@ -9,6 +9,7 @@
> #include <linux/bits.h>
> #include <linux/compiler.h>
> #include <linux/types.h>
> +#include "gt/intel_engine_types.h"
>
> #include "abi/guc_actions_abi.h"
> #include "abi/guc_errors_abi.h"
> @@ -32,6 +33,12 @@
> #define GUC_VIDEO_ENGINE2 4
> #define GUC_MAX_ENGINES_NUM (GUC_VIDEO_ENGINE2 + 1)
>
> +#define GUC_RENDER_CLASS 0
> +#define GUC_VIDEO_CLASS 1
> +#define GUC_VIDEOENHANCE_CLASS 2
> +#define GUC_BLITTER_CLASS 3
> +#define GUC_RESERVED_CLASS 4
> +#define GUC_LAST_ENGINE_CLASS GUC_RESERVED_CLASS
> #define GUC_MAX_ENGINE_CLASSES 16
> #define GUC_MAX_INSTANCES_PER_CLASS 32
>
> @@ -129,6 +136,25 @@
> #define GUC_ID_TO_ENGINE_INSTANCE(guc_id) \
> (((guc_id) & GUC_ENGINE_INSTANCE_MASK) >> GUC_ENGINE_INSTANCE_SHIFT)
>
> +static inline u8 engine_class_to_guc_class(u8 class)
> +{
> + BUILD_BUG_ON(GUC_RENDER_CLASS != RENDER_CLASS);
> + BUILD_BUG_ON(GUC_BLITTER_CLASS != COPY_ENGINE_CLASS);
> + BUILD_BUG_ON(GUC_VIDEO_CLASS != VIDEO_DECODE_CLASS);
> + BUILD_BUG_ON(GUC_VIDEOENHANCE_CLASS != VIDEO_ENHANCEMENT_CLASS);
> + GEM_BUG_ON(class > MAX_ENGINE_CLASS || class == OTHER_CLASS);
> +
> + return class;
> +}
> +
> +static inline u8 guc_class_to_engine_class(u8 guc_class)
> +{
> + GEM_BUG_ON(guc_class > GUC_LAST_ENGINE_CLASS);
> + GEM_BUG_ON(guc_class == GUC_RESERVED_CLASS);
> +
> + return guc_class;
> +}
> +
> /* Work item for submitting workloads into work queue of GuC. */
> struct guc_wq_item {
> u32 header;
> --
> 2.28.0
>
--
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
