diff options
| author | Thomas Hellström <thomas.hellstrom@linux.intel.com> | 2021-11-22 22:45:51 +0100 |
|---|---|---|
| committer | Thomas Hellström <thomas.hellstrom@linux.intel.com> | 2021-11-25 09:36:16 +0100 |
| commit | 8b1f7f92e57d7eff7a3503763dd2c8e0357c36ff (patch) | |
| tree | f143fccf1f0b06eb287717748df4eca57fed6776 /drivers/gpu/drm/i915/gem/i915_gem_ttm.c | |
| parent | 05d1c76107e33346fdc18fed95f28c9edde8a760 (diff) | |
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/gem/i915_gem_ttm.c')
| -rw-r--r-- | drivers/gpu/drm/i915/gem/i915_gem_ttm.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_ttm.c b/drivers/gpu/drm/i915/gem/i915_gem_ttm.c index e9e78ac8f592..6d3d2a558d0f 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_ttm.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_ttm.c @@ -997,7 +997,7 @@ int __i915_gem_ttm_object_init(struct intel_memory_region *mem, i915_gem_object_init(obj, &i915_gem_ttm_obj_ops, &lock_class, flags); /* Don't put on a region list until we're either locked or fully initialized. */ - obj->mm.region = intel_memory_region_get(mem); + obj->mm.region = mem; INIT_LIST_HEAD(&obj->mm.region_link); INIT_RADIX_TREE(&obj->ttm.get_io_page.radix, GFP_KERNEL | __GFP_NOWARN); @@ -1044,6 +1044,7 @@ int __i915_gem_ttm_object_init(struct intel_memory_region *mem, static const struct intel_memory_region_ops ttm_system_region_ops = { .init_object = __i915_gem_ttm_object_init, + .release = intel_region_ttm_fini, }; struct intel_memory_region * |