Commit 0d8ee5ba authored by Thomas Hellström's avatar Thomas Hellström

drm/i915: Don't back up pinned LMEM context images and rings during suspend

Pinned context images are now reset during resume. Don't back them up,
and assuming that rings can be assumed empty at suspend, don't back them
up either.

Introduce a new object flag, I915_BO_ALLOC_PM_VOLATILE meaning that an
object is allowed to lose its content on suspend.

v3:
- Slight documentation clarification (Matthew Auld)
Signed-off-by: default avatarThomas Hellström <thomas.hellstrom@linux.intel.com>
Reviewed-by: default avatarMatthew Auld <matthew.auld@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210922062527.865433-7-thomas.hellstrom@linux.intel.com
parent 3e42cc61
......@@ -288,16 +288,19 @@ struct drm_i915_gem_object {
I915_SELFTEST_DECLARE(struct list_head st_link);
unsigned long flags;
#define I915_BO_ALLOC_CONTIGUOUS BIT(0)
#define I915_BO_ALLOC_VOLATILE BIT(1)
#define I915_BO_ALLOC_CPU_CLEAR BIT(2)
#define I915_BO_ALLOC_USER BIT(3)
#define I915_BO_ALLOC_CONTIGUOUS BIT(0)
#define I915_BO_ALLOC_VOLATILE BIT(1)
#define I915_BO_ALLOC_CPU_CLEAR BIT(2)
#define I915_BO_ALLOC_USER BIT(3)
/* Object is allowed to lose its contents on suspend / resume, even if pinned */
#define I915_BO_ALLOC_PM_VOLATILE BIT(4)
#define I915_BO_ALLOC_FLAGS (I915_BO_ALLOC_CONTIGUOUS | \
I915_BO_ALLOC_VOLATILE | \
I915_BO_ALLOC_CPU_CLEAR | \
I915_BO_ALLOC_USER)
#define I915_BO_READONLY BIT(4)
#define I915_TILING_QUIRK_BIT 5 /* unknown swizzling; do not release! */
I915_BO_ALLOC_USER | \
I915_BO_ALLOC_PM_VOLATILE)
#define I915_BO_READONLY BIT(5)
#define I915_TILING_QUIRK_BIT 6 /* unknown swizzling; do not release! */
/**
* @mem_flags - Mutable placement-related flags
......
......@@ -60,6 +60,9 @@ static int i915_ttm_backup(struct i915_gem_apply_to_region *apply,
if (!pm_apply->backup_pinned)
return 0;
if (obj->flags & I915_BO_ALLOC_PM_VOLATILE)
return 0;
backup = i915_gem_object_create_shmem(i915, obj->base.size);
if (IS_ERR(backup))
return PTR_ERR(backup);
......
......@@ -942,7 +942,8 @@ __lrc_alloc_state(struct intel_context *ce, struct intel_engine_cs *engine)
context_size += PAGE_SIZE;
}
obj = i915_gem_object_create_lmem(engine->i915, context_size, 0);
obj = i915_gem_object_create_lmem(engine->i915, context_size,
I915_BO_ALLOC_PM_VOLATILE);
if (IS_ERR(obj))
obj = i915_gem_object_create_shmem(engine->i915, context_size);
if (IS_ERR(obj))
......
......@@ -112,7 +112,8 @@ static struct i915_vma *create_ring_vma(struct i915_ggtt *ggtt, int size)
struct drm_i915_gem_object *obj;
struct i915_vma *vma;
obj = i915_gem_object_create_lmem(i915, size, I915_BO_ALLOC_VOLATILE);
obj = i915_gem_object_create_lmem(i915, size, I915_BO_ALLOC_VOLATILE |
I915_BO_ALLOC_PM_VOLATILE);
if (IS_ERR(obj) && i915_ggtt_has_aperture(ggtt))
obj = i915_gem_object_create_stolen(i915, size);
if (IS_ERR(obj))
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment