diff options
| author | Chris Wilson <chris@chris-wilson.co.uk> | 2020-12-19 02:03:43 +0000 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2020-12-21 09:53:52 +0000 |
| commit | a4d86249c7735b964ae812b803b828f2651b13b6 (patch) | |
| tree | d8b86ce60ac46dcc87d03b2fa5cefa679e957523 /drivers/gpu/drm/i915/gt/intel_gtt.c | |
| parent | a0d3fdb628b83e3a24acbf6915ede9359a1ecc2b (diff) | |
drm/i915/gt: Provide a utility to create a scratch buffer
Primarily used by selftests, but also by runtime debugging of engine
w/a, is a routine to create a temporarily bound buffer for readback.
Almagamate the duplicated routines into one.
Suggested-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20201219020343.22681-2-chris@chris-wilson.co.uk
Diffstat (limited to 'drivers/gpu/drm/i915/gt/intel_gtt.c')
| -rw-r--r-- | drivers/gpu/drm/i915/gt/intel_gtt.c | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/gt/intel_gtt.c b/drivers/gpu/drm/i915/gt/intel_gtt.c index 7bfe9072be9a..04aa6601e984 100644 --- a/drivers/gpu/drm/i915/gt/intel_gtt.c +++ b/drivers/gpu/drm/i915/gt/intel_gtt.c @@ -422,6 +422,35 @@ void setup_private_pat(struct intel_uncore *uncore) bdw_setup_private_ppat(uncore); } +struct i915_vma * +__vm_create_scratch_for_read(struct i915_address_space *vm, unsigned long size) +{ + struct drm_i915_gem_object *obj; + struct i915_vma *vma; + int err; + + obj = i915_gem_object_create_internal(vm->i915, PAGE_ALIGN(size)); + if (IS_ERR(obj)) + return ERR_CAST(obj); + + i915_gem_object_set_cache_coherency(obj, I915_CACHING_CACHED); + + vma = i915_vma_instance(obj, vm, NULL); + if (IS_ERR(vma)) { + i915_gem_object_put(obj); + return vma; + } + + err = i915_vma_pin(vma, 0, 0, + i915_vma_is_ggtt(vma) ? PIN_GLOBAL : PIN_USER); + if (err) { + i915_vma_put(vma); + return ERR_PTR(err); + } + + return vma; +} + #if IS_ENABLED(CONFIG_DRM_I915_SELFTEST) #include "selftests/mock_gtt.c" #endif |