github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-10-26 20:46:02 +01:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

drm/gem: Add callback for when handle count goes to 0

Browse Source 
Add an optional callback for driver-specific cleanup when the GEM
handle of an object is freed. This will be used by AMDGPU to enable
freeing of memory exported to other nodes in a UALink pod once all
user mode references are gone.

The callback is called outside the object_name_lock and before
releasing the reference count on the GEM object

Suggested-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Mukul Joshi <mukul.joshi@amd.com>
Reviewed-by: Felix Kuehling <felix.kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Mukul Joshi 2026-01-28 14:31:18 -05:00 committed by Alex Deucher
parent 39cfb3fe53
commit b67d2d039f
3 changed files with 24 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c
View File

@ -386,6 +386,14 @@ static int amdgpu_gem_object_mmap(struct drm_gem_object *obj, struct vm_area_str
return drm_gem_ttm_mmap(obj, vma);
}
static void amdgpu_gem_object_handle_free(struct drm_gem_object *gobj)
{
struct amdgpu_bo *aobj = gem_to_amdgpu_bo(gobj);
amdgpu_ualink_revoke_exported_memory(aobj);
}
const struct drm_gem_object_funcs amdgpu_gem_object_funcs = {
.free = amdgpu_gem_object_free,
.open = amdgpu_gem_object_open,
@ -395,6 +403,7 @@ const struct drm_gem_object_funcs amdgpu_gem_object_funcs = {
.vunmap = drm_gem_ttm_vunmap,
.mmap = amdgpu_gem_object_mmap,
.vm_ops = &amdgpu_gem_vm_ops,
.handle_free = amdgpu_gem_object_handle_free
};
static bool amdgpu_gem_are_domains_valid(u32 domains)

5
drivers/gpu/drm/drm_gem.c
View File

@ -353,8 +353,11 @@ void drm_gem_object_handle_put_unlocked(struct drm_gem_object *obj)
}
mutex_unlock(&dev->object_name_lock);
if (final)
if (final) {
if (obj->funcs->handle_free)
obj->funcs->handle_free(obj);
drm_gem_object_put(obj);
}
}
/*

11
include/drm/drm_gem.h
View File

@ -227,6 +227,17 @@ struct drm_gem_object_funcs {
*/
size_t (*rss)(struct drm_gem_object *obj);
/**
* @handle_free:
*
* This callback is called when the GEM handle count goes down to 0.
* It is currently used by AMDGPU driver to release their exported BO
* handles.
*
* This callback is optional.
*/
void (*handle_free)(struct drm_gem_object *obj);
/**
* @vm_ops:
*