[PATCH 07/15] drm/ast: Convert AST driver to Simple TTM

[Thomas Zimmermann]

Signed-off-by: Thomas Zimmermann <tzimmermann at suse.de>
---
 drivers/gpu/drm/ast/Kconfig   |   1 +
 drivers/gpu/drm/ast/ast_drv.h |   6 +-
 drivers/gpu/drm/ast/ast_ttm.c | 120 ++--------------------------------
 3 files changed, 11 insertions(+), 116 deletions(-)

diff --git a/drivers/gpu/drm/ast/Kconfig b/drivers/gpu/drm/ast/Kconfig
index 8d90c5b231c7..bf158b556a84 100644
--- a/drivers/gpu/drm/ast/Kconfig
+++ b/drivers/gpu/drm/ast/Kconfig
@@ -4,6 +4,7 @@ config DRM_AST
 	select DRM_TTM
 	select DRM_KMS_HELPER
 	select DRM_GEM_TTM_HELPER
+	select DRM_SIMPLE_TTM_HELPER
 	help
 	 Say yes for experimental AST GPU driver. Do not enable
 	 this driver without having a working -modesetting,
diff --git a/drivers/gpu/drm/ast/ast_drv.h b/drivers/gpu/drm/ast/ast_drv.h
index 939acac4cc4a..1ed2af255022 100644
--- a/drivers/gpu/drm/ast/ast_drv.h
+++ b/drivers/gpu/drm/ast/ast_drv.h
@@ -40,6 +40,8 @@
 #include <drm/drm_gem.h>
 #include <drm/drm_gem_ttm_helper.h>
 
+#include <drm/drm_simple_ttm_helper.h>
+
 #include <linux/i2c.h>
 #include <linux/i2c-algo-bit.h>
 
@@ -104,9 +106,7 @@ struct ast_private {
 
 	int fb_mtrr;
 
-	struct {
-		struct ttm_bo_device bdev;
-	} ttm;
+	struct drm_simple_ttm ttm;
 
 	struct drm_gem_object *cursor_cache;
 	uint64_t cursor_cache_gpu_addr;
diff --git a/drivers/gpu/drm/ast/ast_ttm.c b/drivers/gpu/drm/ast/ast_ttm.c
index fd587c8fb8f7..58e0ec4a7392 100644
--- a/drivers/gpu/drm/ast/ast_ttm.c
+++ b/drivers/gpu/drm/ast/ast_ttm.c
@@ -30,127 +30,21 @@
 
 #include "ast_drv.h"
 
-static inline struct ast_private *
-ast_bdev(struct ttm_bo_device *bd)
-{
-	return container_of(bd, struct ast_private, ttm.bdev);
-}
-
-static int
-ast_bo_init_mem_type(struct ttm_bo_device *bdev, uint32_t type,
-		     struct ttm_mem_type_manager *man)
-{
-	switch (type) {
-	case TTM_PL_SYSTEM:
-		man->flags = TTM_MEMTYPE_FLAG_MAPPABLE;
-		man->available_caching = TTM_PL_MASK_CACHING;
-		man->default_caching = TTM_PL_FLAG_CACHED;
-		break;
-	case TTM_PL_VRAM:
-		man->func = &ttm_bo_manager_func;
-		man->flags = TTM_MEMTYPE_FLAG_FIXED |
-			TTM_MEMTYPE_FLAG_MAPPABLE;
-		man->available_caching = TTM_PL_FLAG_UNCACHED |
-			TTM_PL_FLAG_WC;
-		man->default_caching = TTM_PL_FLAG_WC;
-		break;
-	default:
-		DRM_ERROR("Unsupported memory type %u\n", (unsigned)type);
-		return -EINVAL;
-	}
-	return 0;
-}
-
-static int ast_ttm_io_mem_reserve(struct ttm_bo_device *bdev,
-				  struct ttm_mem_reg *mem)
-{
-	struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
-	struct ast_private *ast = ast_bdev(bdev);
-
-	mem->bus.addr = NULL;
-	mem->bus.offset = 0;
-	mem->bus.size = mem->num_pages << PAGE_SHIFT;
-	mem->bus.base = 0;
-	mem->bus.is_iomem = false;
-	if (!(man->flags & TTM_MEMTYPE_FLAG_MAPPABLE))
-		return -EINVAL;
-	switch (mem->mem_type) {
-	case TTM_PL_SYSTEM:
-		/* system memory */
-		return 0;
-	case TTM_PL_VRAM:
-		mem->bus.offset = mem->start << PAGE_SHIFT;
-		mem->bus.base = pci_resource_start(ast->dev->pdev, 0);
-		mem->bus.is_iomem = true;
-		break;
-	default:
-		return -EINVAL;
-		break;
-	}
-	return 0;
-}
-
-static void ast_ttm_io_mem_free(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem)
-{
-}
-
-static void ast_ttm_backend_destroy(struct ttm_tt *tt)
-{
-	ttm_tt_fini(tt);
-	kfree(tt);
-}
-
-static struct ttm_backend_func ast_tt_backend_func = {
-	.destroy = &ast_ttm_backend_destroy,
-};
-
-
-static struct ttm_tt *ast_ttm_tt_create(struct ttm_buffer_object *bo,
-					uint32_t page_flags)
-{
-	struct ttm_tt *tt;
-
-	tt = kzalloc(sizeof(struct ttm_tt), GFP_KERNEL);
-	if (tt == NULL)
-		return NULL;
-	tt->func = &ast_tt_backend_func;
-	if (ttm_tt_init(tt, bo, page_flags)) {
-		kfree(tt);
-		return NULL;
-	}
-	return tt;
-}
-
-struct ttm_bo_driver ast_bo_driver = {
-	.ttm_tt_create = ast_ttm_tt_create,
-	.init_mem_type = ast_bo_init_mem_type,
-	.eviction_valuable = ttm_bo_eviction_valuable,
+static const struct drm_simple_ttm_funcs ast_simple_ttm_funcs = {
 	.evict_flags = drm_gem_ttm_bo_driver_evict_flags,
-	.move = NULL,
-	.verify_access = drm_gem_ttm_bo_driver_verify_access,
-	.io_mem_reserve = &ast_ttm_io_mem_reserve,
-	.io_mem_free = &ast_ttm_io_mem_free,
+	.verify_access = drm_gem_ttm_bo_driver_verify_access
 };
 
 int ast_mm_init(struct ast_private *ast)
 {
 	int ret;
 	struct drm_device *dev = ast->dev;
-	struct ttm_bo_device *bdev = &ast->ttm.bdev;
-
-	ret = ttm_bo_device_init(&ast->ttm.bdev,
-				 &ast_bo_driver,
-				 dev->anon_inode->i_mapping,
-				 true);
-	if (ret) {
-		DRM_ERROR("Error initialising bo driver; %d\n", ret);
-		return ret;
-	}
 
-	ret = ttm_bo_init_mm(bdev, TTM_PL_VRAM,
-			     ast->vram_size >> PAGE_SHIFT);
+	ret = drm_simple_ttm_init(&ast->ttm, dev,
+				  pci_resource_start(dev->pdev, 0),
+				  ast->vram_size, &ast_simple_ttm_funcs);
 	if (ret) {
-		DRM_ERROR("Failed ttm VRAM init: %d\n", ret);
+		DRM_ERROR("Error initializing Simple TTM; %d\n", ret);
 		return ret;
 	}
 
@@ -166,7 +60,7 @@ void ast_mm_fini(struct ast_private *ast)
 {
 	struct drm_device *dev = ast->dev;
 
-	ttm_bo_device_release(&ast->ttm.bdev);
+	drm_simple_ttm_cleanup(&ast->ttm);
 
 	arch_phys_wc_del(ast->fb_mtrr);
 	arch_io_free_memtype_wc(pci_resource_start(dev->pdev, 0),
-- 
2.21.0