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drm/amdgpu: Implement new dummy vram manager

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This adds dummy vram manager to support ASICs that do not have a
dedicated or carvedout vram domain.

Reviewed-by: Felix Kuehling <felix.kuehling@amd.com>
Signed-off-by: Rajneesh Bhardwaj <rajneesh.bhardwaj@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Rajneesh Bhardwaj
2023-01-27 21:46:59 -05:00
committed by Alex Deucher
parent 228ce17643
commit f431393d60
1 changed files with 60 additions and 7 deletions
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67
drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
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@@ -370,6 +370,45 @@ int amdgpu_vram_mgr_query_page_status(struct amdgpu_vram_mgr *mgr,
return ret;
}
static void amdgpu_dummy_vram_mgr_debug(struct ttm_resource_manager *man,
struct drm_printer *printer)
{
DRM_DEBUG_DRIVER("Dummy vram mgr debug\n");
}
static bool amdgpu_dummy_vram_mgr_compatible(struct ttm_resource_manager *man,
struct ttm_resource *res,
const struct ttm_place *place,
size_t size)
{
DRM_DEBUG_DRIVER("Dummy vram mgr compatible\n");
return false;
}
static bool amdgpu_dummy_vram_mgr_intersects(struct ttm_resource_manager *man,
struct ttm_resource *res,
const struct ttm_place *place,
size_t size)
{
DRM_DEBUG_DRIVER("Dummy vram mgr intersects\n");
return true;
}
static void amdgpu_dummy_vram_mgr_del(struct ttm_resource_manager *man,
struct ttm_resource *res)
{
DRM_DEBUG_DRIVER("Dummy vram mgr deleted\n");
}
static int amdgpu_dummy_vram_mgr_new(struct ttm_resource_manager *man,
struct ttm_buffer_object *tbo,
const struct ttm_place *place,
struct ttm_resource **res)
{
DRM_DEBUG_DRIVER("Dummy vram mgr new\n");
return -ENOSPC;
}
/**
* amdgpu_vram_mgr_new - allocate new ranges
*
@@ -817,6 +856,14 @@ static void amdgpu_vram_mgr_debug(struct ttm_resource_manager *man,
mutex_unlock(&mgr->lock);
}
static const struct ttm_resource_manager_func amdgpu_dummy_vram_mgr_func = {
.alloc = amdgpu_dummy_vram_mgr_new,
.free = amdgpu_dummy_vram_mgr_del,
.intersects = amdgpu_dummy_vram_mgr_intersects,
.compatible = amdgpu_dummy_vram_mgr_compatible,
.debug = amdgpu_dummy_vram_mgr_debug
};
static const struct ttm_resource_manager_func amdgpu_vram_mgr_func = {
.alloc = amdgpu_vram_mgr_new,
.free = amdgpu_vram_mgr_del,
@@ -841,17 +888,22 @@ int amdgpu_vram_mgr_init(struct amdgpu_device *adev)
ttm_resource_manager_init(man, &adev->mman.bdev,
adev->gmc.real_vram_size);
man->func = &amdgpu_vram_mgr_func;
err = drm_buddy_init(&mgr->mm, man->size, PAGE_SIZE);
if (err)
return err;
mutex_init(&mgr->lock);
INIT_LIST_HEAD(&mgr->reservations_pending);
INIT_LIST_HEAD(&mgr->reserved_pages);
mgr->default_page_size = PAGE_SIZE;
if (!adev->gmc.is_app_apu) {
man->func = &amdgpu_vram_mgr_func;
err = drm_buddy_init(&mgr->mm, man->size, PAGE_SIZE);
if (err)
return err;
} else {
man->func = &amdgpu_dummy_vram_mgr_func;
DRM_INFO("Setup dummy vram mgr\n");
}
ttm_set_driver_manager(&adev->mman.bdev, TTM_PL_VRAM, &mgr->manager);
ttm_resource_manager_set_used(man, true);
return 0;
@@ -886,7 +938,8 @@ void amdgpu_vram_mgr_fini(struct amdgpu_device *adev)
drm_buddy_free_list(&mgr->mm, &rsv->allocated);
kfree(rsv);
}
drm_buddy_fini(&mgr->mm);
if (!adev->gmc.is_app_apu)
drm_buddy_fini(&mgr->mm);
mutex_unlock(&mgr->lock);
ttm_resource_manager_cleanup(man);