drm/ttm: remove available_caching

Instead of letting TTM make an educated guess based on
some mask all drivers should just specify what caching
they want for their CPU mappings.
Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Dave Airlie <airlied@redhat.com>
Link: https://patchwork.freedesktop.org/patch/390207/

drivers/gpu/drm/amd/amdgpu/amdgpu_gtt_mgr.c

@@ -95,7 +95,6 @@ int amdgpu_gtt_mgr_init(struct amdgpu_device *adev, uint64_t gtt_size)
 
 	man->use_tt = true;
 	man->func = &amdgpu_gtt_mgr_func;
-	man->available_caching = TTM_PL_MASK_CACHING;
 
 	ttm_resource_manager_init(man, gtt_size >> PAGE_SHIFT);
 

drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c

@@ -68,7 +68,6 @@ static int amdgpu_ttm_init_on_chip(struct amdgpu_device *adev,
 				    uint64_t size)
 {
 	return ttm_range_man_init(&adev->mman.bdev, type,
-				  TTM_PL_FLAG_UNCACHED,
 				  false, size >> PAGE_SHIFT);
 }
 

drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c

@@ -179,8 +179,6 @@ int amdgpu_vram_mgr_init(struct amdgpu_device *adev)
 	struct ttm_resource_manager *man = &mgr->manager;
 	int ret;
 
-	man->available_caching = TTM_PL_FLAG_UNCACHED | TTM_PL_FLAG_WC;
-
 	ttm_resource_manager_init(man, adev->gmc.real_vram_size >> PAGE_SHIFT);
 
 	man->func = &amdgpu_vram_mgr_func;

drivers/gpu/drm/drm_gem_vram_helper.c

@@ -1057,7 +1057,6 @@ static int drm_vram_mm_init(struct drm_vram_mm *vmm, struct drm_device *dev,
 		return ret;
 
 	ret = ttm_range_man_init(&vmm->bdev, TTM_PL_VRAM,
-				 TTM_PL_FLAG_UNCACHED | TTM_PL_FLAG_WC,
 				 false, vram_size >> PAGE_SHIFT);
 	if (ret)
 		return ret;

drivers/gpu/drm/nouveau/nouveau_ttm.c

@@ -200,7 +200,6 @@ nouveau_ttm_init_vram(struct nouveau_drm *drm)
 		if (!man)
 			return -ENOMEM;
 
-		man->available_caching = TTM_PL_FLAG_UNCACHED | TTM_PL_FLAG_WC;
 		man->func = &nouveau_vram_manager;
 
 		ttm_resource_manager_init(man,
@@ -209,9 +208,7 @@ nouveau_ttm_init_vram(struct nouveau_drm *drm)
 		ttm_resource_manager_set_used(man, true);
 		return 0;
 	} else {
-		return ttm_range_man_init(&drm->ttm.bdev, TTM_PL_VRAM,
-					  TTM_PL_FLAG_UNCACHED | TTM_PL_FLAG_WC,
-					  false,
+		return ttm_range_man_init(&drm->ttm.bdev, TTM_PL_VRAM, false,
 					  drm->gem.vram_available >> PAGE_SHIFT);
 	}
 }
@@ -243,8 +240,7 @@ nouveau_ttm_init_gtt(struct nouveau_drm *drm)
 	else if (!drm->agp.bridge)
 		func = &nv04_gart_manager;
 	else
-		return ttm_range_man_init(&drm->ttm.bdev, TTM_PL_TT,
-					  TTM_PL_MASK_CACHING, true,
+		return ttm_range_man_init(&drm->ttm.bdev, TTM_PL_TT, true,
 					  size_pages);
 
 	man = kzalloc(sizeof(*man), GFP_KERNEL);
@@ -252,7 +248,6 @@ nouveau_ttm_init_gtt(struct nouveau_drm *drm)
 		return -ENOMEM;
 
 	man->func = func;
-	man->available_caching = TTM_PL_MASK_CACHING;
 	man->use_tt = true;
 	ttm_resource_manager_init(man, size_pages);
 	ttm_set_driver_manager(&drm->ttm.bdev, TTM_PL_TT, man);

drivers/gpu/drm/qxl/qxl_ttm.c

@@ -202,8 +202,7 @@ static int qxl_ttm_init_mem_type(struct qxl_device *qdev,
 				 unsigned int type,
 				 uint64_t size)
 {
-	return ttm_range_man_init(&qdev->mman.bdev, type, TTM_PL_MASK_CACHING,
-				  false, size);
+	return ttm_range_man_init(&qdev->mman.bdev, type, false, size);
 }
 
 int qxl_ttm_init(struct qxl_device *qdev)

drivers/gpu/drm/radeon/radeon_ttm.c

@@ -69,14 +69,12 @@ struct radeon_device *radeon_get_rdev(struct ttm_bo_device *bdev)
 static int radeon_ttm_init_vram(struct radeon_device *rdev)
 {
 	return ttm_range_man_init(&rdev->mman.bdev, TTM_PL_VRAM,
-				  TTM_PL_FLAG_UNCACHED | TTM_PL_FLAG_WC,
 				  false, rdev->mc.real_vram_size >> PAGE_SHIFT);
 }
 
 static int radeon_ttm_init_gtt(struct radeon_device *rdev)
 {
 	return ttm_range_man_init(&rdev->mman.bdev, TTM_PL_TT,
-				  TTM_PL_MASK_CACHING,
 				  true, rdev->mc.gtt_size >> PAGE_SHIFT);
 }
 

drivers/gpu/drm/ttm/ttm_bo.c

@@ -910,11 +910,8 @@ static int ttm_bo_mem_placement(struct ttm_buffer_object *bo,
 	if (!man || !ttm_resource_manager_used(man))
 		return -EBUSY;
 
-	if ((place->flags & man->available_caching) == 0)
-		return -EBUSY;
-
-	cur_flags = place->flags & man->available_caching;
-	cur_flags = ttm_bo_select_caching(man, bo->mem.placement, cur_flags);
+	cur_flags = ttm_bo_select_caching(man, bo->mem.placement,
+					  place->flags);
 	cur_flags |= place->flags & ~TTM_PL_MASK_CACHING;
 
 	mem->mem_type = place->mem_type;
@@ -1432,7 +1429,6 @@ static void ttm_bo_init_sysman(struct ttm_bo_device *bdev)
 	 * Other types need to be driver / IOCTL initialized.
 	 */
 	man->use_tt = true;
-	man->available_caching = TTM_PL_MASK_CACHING;
 
 	ttm_resource_manager_init(man, 0);
 	ttm_set_driver_manager(bdev, TTM_PL_SYSTEM, man);

drivers/gpu/drm/ttm/ttm_range_manager.c

@@ -113,9 +113,7 @@ static void ttm_range_man_free(struct ttm_resource_manager *man,
 static const struct ttm_resource_manager_func ttm_range_manager_func;
 
 int ttm_range_man_init(struct ttm_bo_device *bdev,
-		       unsigned type,
-		       uint32_t available_caching,
-		       bool use_tt,
+		       unsigned type, bool use_tt,
 		       unsigned long p_size)
 {
 	struct ttm_resource_manager *man;
@@ -126,7 +124,6 @@ int ttm_range_man_init(struct ttm_bo_device *bdev,
 		return -ENOMEM;
 
 	man = &rman->manager;
-	man->available_caching = available_caching;
 	man->use_tt = use_tt;
 
 	man->func = &ttm_range_manager_func;

drivers/gpu/drm/ttm/ttm_resource.c

@@ -140,7 +140,6 @@ void ttm_resource_manager_debug(struct ttm_resource_manager *man,
 	drm_printf(p, "  use_type: %d\n", man->use_type);
 	drm_printf(p, "  use_tt: %d\n", man->use_tt);
 	drm_printf(p, "  size: %llu\n", man->size);
-	drm_printf(p, "  available_caching: 0x%08X\n", man->available_caching);
 	if (man->func && man->func->debug)
 		(*man->func->debug)(man, p);
 }

drivers/gpu/drm/vmwgfx/vmwgfx_drv.c

@@ -626,8 +626,7 @@ static int vmw_vram_manager_init(struct vmw_private *dev_priv)
 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
 	ret = vmw_thp_init(dev_priv);
 #else
-	ret = ttm_range_man_init(&dev_priv->bdev, TTM_PL_VRAM,
-				 TTM_PL_FLAG_CACHED, false,
+	ret = ttm_range_man_init(&dev_priv->bdev, TTM_PL_VRAM, false,
 				 dev_priv->vram_size >> PAGE_SHIFT);
 #endif
 	ttm_resource_manager_set_used(ttm_manager_type(&dev_priv->bdev, TTM_PL_VRAM), false);
@@ -882,8 +881,6 @@ static int vmw_driver_load(struct drm_device *dev, unsigned long chipset)
 		DRM_ERROR("Failed initializing TTM buffer object driver.\n");
 		goto out_no_bdev;
 	}
-	ttm_manager_type(&dev_priv->bdev, TTM_PL_SYSTEM)->available_caching =
-		TTM_PL_FLAG_CACHED;
 
 	/*
 	 * Enable VRAM, but initially don't use it until SVGA is enabled and

drivers/gpu/drm/vmwgfx/vmwgfx_gmrid_manager.c

@@ -112,7 +112,6 @@ int vmw_gmrid_man_init(struct vmw_private *dev_priv, int type)
 	man = &gman->manager;
 
 	man->func = &vmw_gmrid_manager_func;
-	man->available_caching = TTM_PL_FLAG_CACHED;
 	/* TODO: This is most likely not correct */
 	man->use_tt = true;
 	ttm_resource_manager_init(man, 0);

drivers/gpu/drm/vmwgfx/vmwgfx_thp.c

@@ -123,24 +123,20 @@ static void vmw_thp_put_node(struct ttm_resource_manager *man,
 
 int vmw_thp_init(struct vmw_private *dev_priv)
 {
-	struct ttm_resource_manager *man;
 	struct vmw_thp_manager *rman;
 
 	rman = kzalloc(sizeof(*rman), GFP_KERNEL);
 	if (!rman)
 		return -ENOMEM;
 
-	man = &rman->manager;
-	man->available_caching = TTM_PL_FLAG_CACHED;
-
-	ttm_resource_manager_init(man,
+	ttm_resource_manager_init(&rman->manager,
 				  dev_priv->vram_size >> PAGE_SHIFT);
 
-	drm_mm_init(&rman->mm, 0, man->size);
+	drm_mm_init(&rman->mm, 0, rman->manager.size);
 	spin_lock_init(&rman->lock);
 
 	ttm_set_driver_manager(&dev_priv->bdev, TTM_PL_VRAM, &rman->manager);
-	ttm_resource_manager_set_used(man, true);
+	ttm_resource_manager_set_used(&rman->manager, true);
 	return 0;
 }
 

include/drm/ttm/ttm_bo_driver.h

@@ -689,7 +689,6 @@ pgprot_t ttm_io_prot(uint32_t caching_flags, pgprot_t tmp);
  *
  * @bdev: ttm device
  * @type: memory manager type
- * @available_caching: TTM_PL_FLAG_* for allowed caching modes
  * @use_tt: if the memory manager uses tt
  * @p_size: size of area to be managed in pages.
  *
@@ -697,9 +696,7 @@ pgprot_t ttm_io_prot(uint32_t caching_flags, pgprot_t tmp);
  * The range manager is installed for this device in the type slot.
  */
 int ttm_range_man_init(struct ttm_bo_device *bdev,
-		       unsigned type,
-		       uint32_t available_caching,
-		       bool use_tt,
+		       unsigned type, bool use_tt,
 		       unsigned long p_size);
 
 /**

include/drm/ttm/ttm_resource.h

@@ -108,8 +108,6 @@ struct ttm_resource_manager_func {
  * @gpu_offset: If used, the GPU offset of the first managed page of
  * fixed memory or the first managed location in an aperture.
  * @size: Size of the managed region.
- * @available_caching: A mask of available caching types, TTM_PL_FLAG_XX,
- * as defined in ttm_placement_common.h
  * @func: structure pointer implementing the range manager. See above
  * @move_lock: lock for move fence
  * static information. bdev::driver::io_mem_free is never used.
@@ -125,7 +123,6 @@ struct ttm_resource_manager {
 	bool use_type;
 	bool use_tt;
 	uint64_t size;
-	uint32_t available_caching;
 	const struct ttm_resource_manager_func *func;
 	spinlock_t move_lock;