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| author | Thomas Hellström <thomas.hellstrom@linux.intel.com> | 2021-11-23 00:45:51 +0300 |
|---|---|---|
| committer | Thomas Hellström <thomas.hellstrom@linux.intel.com> | 2021-11-25 11:36:16 +0300 |
| commit | 8b1f7f92e57d7eff7a3503763dd2c8e0357c36ff (patch) | |
| tree | f143fccf1f0b06eb287717748df4eca57fed6776 /drivers/gpu/drm/i915/intel_region_ttm.h | |
| parent | 05d1c76107e33346fdc18fed95f28c9edde8a760 (diff) | |
| download | linux-8b1f7f92e57d7eff7a3503763dd2c8e0357c36ff.tar.xz | |
drm/i915/ttm: Drop region reference counting
There is an interesting refcounting loop:
struct intel_memory_region has a struct ttm_resource_manager,
ttm_resource_manager->move may hold a reference to i915_request,
i915_request may hold a reference to intel_context,
intel_context may hold a reference to drm_i915_gem_object,
drm_i915_gem_object may hold a reference to intel_memory_region.
Break this loop by dropping region reference counting.
In addition, Have regions with a manager moving fence make sure
that all region objects are released before freeing the region.
v6:
- Fix a code comment.
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/20211122214554.371864-4-thomas.hellstrom@linux.intel.com
Diffstat (limited to 'drivers/gpu/drm/i915/intel_region_ttm.h')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_region_ttm.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/intel_region_ttm.h b/drivers/gpu/drm/i915/intel_region_ttm.h index 7bbe2b46b504..fdee5e7bd46c 100644 --- a/drivers/gpu/drm/i915/intel_region_ttm.h +++ b/drivers/gpu/drm/i915/intel_region_ttm.h @@ -20,7 +20,7 @@ void intel_region_ttm_device_fini(struct drm_i915_private *dev_priv); int intel_region_ttm_init(struct intel_memory_region *mem); -void intel_region_ttm_fini(struct intel_memory_region *mem); +int intel_region_ttm_fini(struct intel_memory_region *mem); struct i915_refct_sgt * intel_region_ttm_resource_to_rsgt(struct intel_memory_region *mem, |