git/linux-cryptodev-2.6
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/herbert/cryptodev-2.6.git synced 2026-04-23 05:56:14 -04:00
Code Issues Packages Projects Releases Wiki Activity

drm/i915: preparation for using PAT index

Browse Source 
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
This commit is contained in:
Fei Yang
2023-05-09 09:51:59 -07:00
committed by Andi Shyti
parent 5b8ff071b5
commit 5e352e32ae
9 changed files with 116 additions and 11 deletions
Download Patch File Download Diff File Expand all files Collapse all files

9
drivers/gpu/drm/i915/gem/i915_gem_object.c
View File

@@ -45,6 +45,15 @@ static struct kmem_cache *slab_objects;
static const struct drm_gem_object_funcs i915_gem_object_funcs;
unsigned int i915_gem_get_pat_index(struct drm_i915_private *i915,
enum i915_cache_level level)
{
if (drm_WARN_ON(&i915->drm, level >= I915_MAX_CACHE_LEVEL))
return 0;
return INTEL_INFO(i915)->cachelevel_to_pat[level];
}
struct drm_i915_gem_object *i915_gem_object_alloc(void)
{
struct drm_i915_gem_object *obj;