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| author | Fei Yang <fei.yang@intel.com> | 2023-05-09 19:51:59 +0300 |
|---|---|---|
| committer | Andi Shyti <andi.shyti@linux.intel.com> | 2023-05-11 18:38:36 +0300 |
| commit | 5e352e32aec23570ea948f039e25faf9b9ba362b (patch) | |
| tree | 39aede5e12b7991a80c12897eed60c291b704b8e /drivers/gpu/drm/i915/intel_device_info.h | |
| parent | 5b8ff071b57e0a50a0e6eb8db55d159a68853f6b (diff) | |
| download | linux-5e352e32aec23570ea948f039e25faf9b9ba362b.tar.xz | |
drm/i915: preparation for using PAT index
This patch is a preparation for replacing enum i915_cache_level with PAT
index. Caching policy for buffer objects is set through the PAT index in
PTE, the old i915_cache_level is not sufficient to represent all caching
modes supported by the hardware.
Preparing the transition by adding some platform dependent data structures
and helper functions to translate the cache_level to pat_index.
cachelevel_to_pat: a platform dependent array mapping cache_level to
pat_index.
max_pat_index: the maximum PAT index recommended in hardware specification
Needed for validating the PAT index passed in from user
space.
i915_gem_get_pat_index: function to convert cache_level to PAT index.
obj_to_i915(obj): macro moved to header file for wider usage.
I915_MAX_CACHE_LEVEL: upper bound of i915_cache_level for the
convenience of coding.
Cc: Chris Wilson <chris.p.wilson@linux.intel.com>
Cc: Matt Roper <matthew.d.roper@intel.com>
Signed-off-by: Fei Yang <fei.yang@intel.com>
Reviewed-by: Andi Shyti <andi.shyti@linux.intel.com>
Reviewed-by: Andrzej Hajda <andrzej.hajda@intel.com>
Signed-off-by: Andi Shyti <andi.shyti@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230509165200.1740-2-fei.yang@intel.com
Diffstat (limited to 'drivers/gpu/drm/i915/intel_device_info.h')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_device_info.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/intel_device_info.h b/drivers/gpu/drm/i915/intel_device_info.h index 080a4557899b..d737dd601a6e 100644 --- a/drivers/gpu/drm/i915/intel_device_info.h +++ b/drivers/gpu/drm/i915/intel_device_info.h @@ -35,6 +35,8 @@ #include "gt/intel_context_types.h" #include "gt/intel_sseu.h" +#include "gem/i915_gem_object_types.h" + struct drm_printer; struct drm_i915_private; struct intel_gt_definition; @@ -308,6 +310,9 @@ struct intel_device_info { * Initial runtime info. Do not access outside of i915_driver_create(). */ const struct intel_runtime_info __runtime; + + u32 cachelevel_to_pat[I915_MAX_CACHE_LEVEL]; + u32 max_pat_index; }; struct intel_driver_caps { |