diff options
Diffstat (limited to 'drivers/gpu/drm/i915/gem/i915_gem_object.c')
| -rw-r--r-- | drivers/gpu/drm/i915/gem/i915_gem_object.c | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_object.c b/drivers/gpu/drm/i915/gem/i915_gem_object.c index 06b1b188ce5a..ccec4055fde3 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_object.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_object.c @@ -717,6 +717,32 @@ bool i915_gem_object_placement_possible(struct drm_i915_gem_object *obj, return false; } +/** + * i915_gem_object_needs_ccs_pages - Check whether the object requires extra + * pages when placed in system-memory, in order to save and later restore the + * flat-CCS aux state when the object is moved between local-memory and + * system-memory + * @obj: Pointer to the object + * + * Return: True if the object needs extra ccs pages. False otherwise. + */ +bool i915_gem_object_needs_ccs_pages(struct drm_i915_gem_object *obj) +{ + bool lmem_placement = false; + int i; + + for (i = 0; i < obj->mm.n_placements; i++) { + /* Compression is not allowed for the objects with smem placement */ + if (obj->mm.placements[i]->type == INTEL_MEMORY_SYSTEM) + return false; + if (!lmem_placement && + obj->mm.placements[i]->type == INTEL_MEMORY_LOCAL) + lmem_placement = true; + } + + return lmem_placement; +} + void i915_gem_init__objects(struct drm_i915_private *i915) { INIT_DELAYED_WORK(&i915->mm.free_work, __i915_gem_free_work); @@ -783,10 +809,31 @@ int i915_gem_object_wait_moving_fence(struct drm_i915_gem_object *obj, intr, MAX_SCHEDULE_TIMEOUT); if (!ret) ret = -ETIME; + else if (ret > 0 && i915_gem_object_has_unknown_state(obj)) + ret = -EIO; return ret < 0 ? ret : 0; } +/** + * i915_gem_object_has_unknown_state - Return true if the object backing pages are + * in an unknown_state. This means that userspace must NEVER be allowed to touch + * the pages, with either the GPU or CPU. + * + * ONLY valid to be called after ensuring that all kernel fences have signalled + * (in particular the fence for moving/clearing the object). + */ +bool i915_gem_object_has_unknown_state(struct drm_i915_gem_object *obj) +{ + /* + * The below barrier pairs with the dma_fence_signal() in + * __memcpy_work(). We should only sample the unknown_state after all + * the kernel fences have signalled. + */ + smp_rmb(); + return obj->mm.unknown_state; +} + #if IS_ENABLED(CONFIG_DRM_I915_SELFTEST) #include "selftests/huge_gem_object.c" #include "selftests/huge_pages.c" |