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author | Thomas Hellström <thomas.hellstrom@linux.intel.com> | 2021-09-22 09:25:22 +0300 |
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committer | Thomas Hellström <thomas.hellstrom@linux.intel.com> | 2021-09-24 09:19:11 +0300 |
commit | c56ce9565374e565a4d9eb79aff60a7c19fd4b28 (patch) | |
tree | bc491c6e85bdce8be8006eb87cb9cf96ed66baac /drivers/gpu/drm/i915/gt/intel_gt_pm.c | |
parent | 81387fc4f6e080806da7a481eca0052fc76cfbd2 (diff) | |
download | linux-c56ce9565374e565a4d9eb79aff60a7c19fd4b28.tar.xz |
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/gt/intel_gt_pm.c')
-rw-r--r-- | drivers/gpu/drm/i915/gt/intel_gt_pm.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/gpu/drm/i915/gt/intel_gt_pm.c b/drivers/gpu/drm/i915/gt/intel_gt_pm.c index f84f2bfe2de0..e9da36530b45 100644 --- a/drivers/gpu/drm/i915/gt/intel_gt_pm.c +++ b/drivers/gpu/drm/i915/gt/intel_gt_pm.c @@ -297,8 +297,6 @@ void intel_gt_suspend_prepare(struct intel_gt *gt) { user_forcewake(gt, true); wait_for_suspend(gt); - - intel_uc_suspend(>->uc); } static suspend_state_t pm_suspend_target(void) @@ -322,6 +320,8 @@ void intel_gt_suspend_late(struct intel_gt *gt) GEM_BUG_ON(gt->awake); + intel_uc_suspend(>->uc); + /* * On disabling the device, we want to turn off HW access to memory * that we no longer own. |