diff options
author | 2021-09-22 08:25:22 +0200 | |
---|---|---|
committer | 2021-09-24 08:19:11 +0200 | |
commit | c56ce9565374e565a4d9eb79aff60a7c19fd4b28 (patch) | |
tree | bc491c6e85bdce8be8006eb87cb9cf96ed66baac /drivers/gpu/drm/i915/gem/i915_gem_object_types.h | |
parent | drm/i915/gt: Increase suspend timeout (diff) | |
download | linux-dev-c56ce9565374e565a4d9eb79aff60a7c19fd4b28.tar.xz linux-dev-c56ce9565374e565a4d9eb79aff60a7c19fd4b28.zip |
drm/i915 Implement LMEM backup and restore for suspend / resume
Just evict unpinned objects to system. For pinned LMEM objects,
make a backup system object and blit the contents to that.
Backup is performed in three steps,
1: Opportunistically evict evictable objects using the gpu blitter.
2: After gt idle, evict evictable objects using the gpu blitter. This will
be modified in an upcoming patch to backup pinned objects that are not used
by the blitter itself.
3: Backup remaining pinned objects using memcpy.
Also move uC suspend to after 2) to make sure we have a functional GuC
during 2) if using GuC submission.
v2:
- Major refactor to make sure gem_exec_suspend@hang-SX subtests work, and
suspend / resume works with a slightly modified GuC submission enabling
patch series.
v3:
- Fix a potential use-after-free (Matthew Auld)
- Use i915_gem_object_create_shmem() instead of
i915_gem_object_create_region (Matthew Auld)
- Minor simplifications (Matthew Auld)
- Fix up kerneldoc for i195_ttm_restore_region().
- Final lmem_suspend() call moved to i915_gem_backup_suspend from
i915_gem_suspend_late, since the latter gets called at driver unload
and we don't unnecessarily want to run it at that time.
v4:
- Interface change of ttm- & lmem suspend / resume functions to use
flags rather than bools. (Matthew Auld)
- Completely drop the i915_gem_backup_suspend change (Matthew Auld)
Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210922062527.865433-5-thomas.hellstrom@linux.intel.com
Diffstat (limited to 'drivers/gpu/drm/i915/gem/i915_gem_object_types.h')
-rw-r--r-- | drivers/gpu/drm/i915/gem/i915_gem_object_types.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_object_types.h b/drivers/gpu/drm/i915/gem/i915_gem_object_types.h index 2471f36aaff3..734cc8e16481 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_object_types.h +++ b/drivers/gpu/drm/i915/gem/i915_gem_object_types.h @@ -534,6 +534,7 @@ struct drm_i915_gem_object { struct { struct sg_table *cached_io_st; struct i915_gem_object_page_iter get_io_page; + struct drm_i915_gem_object *backup; bool created:1; } ttm; |