diff options
Diffstat (limited to 'drivers/gpu/drm/ast/ast_mm.c')
| -rw-r--r-- | drivers/gpu/drm/ast/ast_mm.c | 107 |
1 files changed, 107 insertions, 0 deletions
diff --git a/drivers/gpu/drm/ast/ast_mm.c b/drivers/gpu/drm/ast/ast_mm.c new file mode 100644 index 000000000000..9186ec3ebbe0 --- /dev/null +++ b/drivers/gpu/drm/ast/ast_mm.c @@ -0,0 +1,107 @@ +/* + * Copyright 2012 Red Hat Inc. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the + * "Software"), to deal in the Software without restriction, including + * without limitation the rights to use, copy, modify, merge, publish, + * distribute, sub license, and/or sell copies of the Software, and to + * permit persons to whom the Software is furnished to do so, subject to + * the following conditions: + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL + * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, + * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR + * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE + * USE OR OTHER DEALINGS IN THE SOFTWARE. + * + * The above copyright notice and this permission notice (including the + * next paragraph) shall be included in all copies or substantial portions + * of the Software. + * + */ +/* + * Authors: Dave Airlie <airlied@redhat.com> + */ + +#include <linux/pci.h> + +#include <drm/drm_gem_vram_helper.h> +#include <drm/drm_managed.h> +#include <drm/drm_print.h> + +#include "ast_drv.h" + +static u32 ast_get_vram_size(struct ast_private *ast) +{ + u8 jreg; + u32 vram_size; + + ast_open_key(ast); + + vram_size = AST_VIDMEM_DEFAULT_SIZE; + jreg = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xaa, 0xff); + switch (jreg & 3) { + case 0: + vram_size = AST_VIDMEM_SIZE_8M; + break; + case 1: + vram_size = AST_VIDMEM_SIZE_16M; + break; + case 2: + vram_size = AST_VIDMEM_SIZE_32M; + break; + case 3: + vram_size = AST_VIDMEM_SIZE_64M; + break; + } + + jreg = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0x99, 0xff); + switch (jreg & 0x03) { + case 1: + vram_size -= 0x100000; + break; + case 2: + vram_size -= 0x200000; + break; + case 3: + vram_size -= 0x400000; + break; + } + + return vram_size; +} + +static void ast_mm_release(struct drm_device *dev, void *ptr) +{ + struct ast_private *ast = to_ast_private(dev); + + arch_phys_wc_del(ast->fb_mtrr); + arch_io_free_memtype_wc(pci_resource_start(dev->pdev, 0), + pci_resource_len(dev->pdev, 0)); +} + +int ast_mm_init(struct ast_private *ast) +{ + u32 vram_size; + int ret; + struct drm_device *dev = ast->dev; + + vram_size = ast_get_vram_size(ast); + + ret = drmm_vram_helper_init(dev, pci_resource_start(dev->pdev, 0), + vram_size); + if (ret) { + drm_err(dev, "Error initializing VRAM MM; %d\n", ret); + return ret; + } + + arch_io_reserve_memtype_wc(pci_resource_start(dev->pdev, 0), + pci_resource_len(dev->pdev, 0)); + ast->fb_mtrr = arch_phys_wc_add(pci_resource_start(dev->pdev, 0), + pci_resource_len(dev->pdev, 0)); + + return drmm_add_action_or_reset(dev, ast_mm_release, NULL); +} |