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| author | Chris Wilson <chris@chris-wilson.co.uk> | 2017-08-11 12:11:16 +0100 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2017-08-15 15:46:57 +0100 |
| commit | b8f55be64453ea77fc51bff6cd0d906d18ce1cd2 (patch) | |
| tree | 4027cbcc167720619217458cf7a7213913f6dc81 /drivers/gpu/drm/i915/i915_gem_object.h | |
| parent | 9c3a16c887f0f8f62813d841f028eabc153581f3 (diff) | |
| download | linux-b8f55be64453ea77fc51bff6cd0d906d18ce1cd2.tar.gz | |
drm/i915: Split obj->cache_coherent to track r/w
Another month, another story in the cache coherency saga. This time, we
come to the realisation that i915_gem_object_is_coherent() has been
reporting whether we can read from the target without requiring a cache
invalidate; but we were using it in places for testing whether we could
write into the object without requiring a cache flush. So split the
tracking into two, one to decide before reads, one after writes.
See commit e27ab73d17ef ("drm/i915: Mark CPU cache as dirty on every
transition for CPU writes") for the previous entry in this saga.
v2: Be verbose
v3: Remove unused function (i915_gem_object_is_coherent)
v4: Fix inverted coherency check prior to execbuf (from v2)
v5: Add comment for nasty code where we are optimising on gcc's behalf.
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=101109
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=101555
Testcase: igt/kms_mmap_write_crc
Testcase: igt/kms_pwrite_crc
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Dongwon Kim <dongwon.kim@intel.com>
Cc: Matt Roper <matthew.d.roper@intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Tested-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Acked-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20170811111116.10373-1-chris@chris-wilson.co.uk
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Diffstat (limited to 'drivers/gpu/drm/i915/i915_gem_object.h')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_gem_object.h | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/i915_gem_object.h b/drivers/gpu/drm/i915/i915_gem_object.h index 5b19a4916a4d..3baa341432db 100644 --- a/drivers/gpu/drm/i915/i915_gem_object.h +++ b/drivers/gpu/drm/i915/i915_gem_object.h @@ -33,8 +33,11 @@ #include <drm/i915_drm.h> +#include "i915_gem_request.h" #include "i915_selftest.h" +struct drm_i915_gem_object; + struct drm_i915_gem_object_ops { unsigned int flags; #define I915_GEM_OBJECT_HAS_STRUCT_PAGE BIT(0) @@ -118,8 +121,10 @@ struct drm_i915_gem_object { */ unsigned long gt_ro:1; unsigned int cache_level:3; + unsigned int cache_coherent:2; +#define I915_BO_CACHE_COHERENT_FOR_READ BIT(0) +#define I915_BO_CACHE_COHERENT_FOR_WRITE BIT(1) unsigned int cache_dirty:1; - unsigned int cache_coherent:1; atomic_t frontbuffer_bits; unsigned int frontbuffer_ggtt_origin; /* write once */ @@ -391,6 +396,8 @@ i915_gem_object_last_write_engine(struct drm_i915_gem_object *obj) return engine; } +void i915_gem_object_set_cache_coherency(struct drm_i915_gem_object *obj, + unsigned int cache_level); void i915_gem_object_flush_if_display(struct drm_i915_gem_object *obj); #endif |