From b3a25b9af80d5151bb6f8373847e26628541a766 Mon Sep 17 00:00:00 2001 From: Thomas Zimmermann Date: Wed, 8 May 2019 10:26:23 +0200 Subject: drm/bochs: Convert bochs driver to VRAM MM The data structure |struct drm_vram_mm| and its helpers replace bochs' TTM-based memory manager. It's the same implementation; except for the type names. v5: * set .llseek via DRM_VRAM_MM_FILE_OPERATIONS v4: * don't select DRM_TTM or DRM_VRAM_MM_HELPER v3: * use drm_gem_vram_mm_funcs * convert driver to drm_device-based instance v2: * implement bochs_mmap() with drm_vram_mm_mmap() Signed-off-by: Thomas Zimmermann Link: http://patchwork.freedesktop.org/patch/msgid/20190508082630.15116-14-tzimmermann@suse.de Signed-off-by: Gerd Hoffmann --- drivers/gpu/drm/bochs/bochs_mm.c | 148 +++------------------------------------ 1 file changed, 8 insertions(+), 140 deletions(-) (limited to 'drivers/gpu/drm/bochs/bochs_mm.c') diff --git a/drivers/gpu/drm/bochs/bochs_mm.c b/drivers/gpu/drm/bochs/bochs_mm.c index b19ff8094049..cfb497140f6f 100644 --- a/drivers/gpu/drm/bochs/bochs_mm.c +++ b/drivers/gpu/drm/bochs/bochs_mm.c @@ -9,155 +9,23 @@ /* ---------------------------------------------------------------------- */ -static inline struct bochs_device *bochs_bdev(struct ttm_bo_device *bd) -{ - return container_of(bd, struct bochs_device, ttm.bdev); -} - -static int bochs_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 bochs_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 bochs_device *bochs = bochs_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 = bochs->fb_base; - mem->bus.is_iomem = true; - break; - default: - return -EINVAL; - break; - } - return 0; -} - -static void bochs_ttm_io_mem_free(struct ttm_bo_device *bdev, - struct ttm_mem_reg *mem) -{ -} - -static void bochs_ttm_backend_destroy(struct ttm_tt *tt) -{ - ttm_tt_fini(tt); - kfree(tt); -} - -static struct ttm_backend_func bochs_tt_backend_func = { - .destroy = &bochs_ttm_backend_destroy, -}; - -static struct ttm_tt *bochs_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 = &bochs_tt_backend_func; - if (ttm_tt_init(tt, bo, page_flags)) { - kfree(tt); - return NULL; - } - return tt; -} - -static struct ttm_bo_driver bochs_bo_driver = { - .ttm_tt_create = bochs_ttm_tt_create, - .init_mem_type = bochs_bo_init_mem_type, - .eviction_valuable = ttm_bo_eviction_valuable, - .evict_flags = drm_gem_vram_bo_driver_evict_flags, - .move = NULL, - .verify_access = drm_gem_vram_bo_driver_verify_access, - .io_mem_reserve = &bochs_ttm_io_mem_reserve, - .io_mem_free = &bochs_ttm_io_mem_free, -}; - int bochs_mm_init(struct bochs_device *bochs) { - struct ttm_bo_device *bdev = &bochs->ttm.bdev; - int ret; - - ret = ttm_bo_device_init(&bochs->ttm.bdev, - &bochs_bo_driver, - bochs->dev->anon_inode->i_mapping, - true); - if (ret) { - DRM_ERROR("Error initialising bo driver; %d\n", ret); - return ret; - } + struct drm_vram_mm *vmm; - ret = ttm_bo_init_mm(bdev, TTM_PL_VRAM, - bochs->fb_size >> PAGE_SHIFT); - if (ret) { - DRM_ERROR("Failed ttm VRAM init: %d\n", ret); - return ret; - } + vmm = drm_vram_helper_alloc_mm(bochs->dev, bochs->fb_base, + bochs->fb_size, + &drm_gem_vram_mm_funcs); + if (IS_ERR(vmm)) + return PTR_ERR(vmm); - bochs->ttm.initialized = true; return 0; } void bochs_mm_fini(struct bochs_device *bochs) { - if (!bochs->ttm.initialized) + if (!bochs->dev->vram_mm) return; - ttm_bo_device_release(&bochs->ttm.bdev); - bochs->ttm.initialized = false; -} - -int bochs_mmap(struct file *filp, struct vm_area_struct *vma) -{ - struct drm_file *file_priv = filp->private_data; - struct bochs_device *bochs = file_priv->minor->dev->dev_private; - - return ttm_bo_mmap(filp, vma, &bochs->ttm.bdev); -} - -/* ---------------------------------------------------------------------- */ - -int bochs_dumb_create(struct drm_file *file, struct drm_device *dev, - struct drm_mode_create_dumb *args) -{ - struct bochs_device *bochs = dev->dev_private; - - return drm_gem_vram_fill_create_dumb(file, dev, &bochs->ttm.bdev, 0, - false, args); + drm_vram_helper_release_mm(bochs->dev); } -- cgit v1.2.3-59-g8ed1b