2 * Copyright 2012 Red Hat Inc.
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the
6 * "Software"), to deal in the Software without restriction, including
7 * without limitation the rights to use, copy, modify, merge, publish,
8 * distribute, sub license, and/or sell copies of the Software, and to
9 * permit persons to whom the Software is furnished to do so, subject to
10 * the following conditions:
12 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
13 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
14 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
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16 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
17 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
18 * USE OR OTHER DEALINGS IN THE SOFTWARE.
20 * The above copyright notice and this permission notice (including the
21 * next paragraph) shall be included in all copies or substantial portions
29 #include <linux/pci.h>
31 #include <drm/drm_gem_vram_helper.h>
32 #include <drm/drm_managed.h>
33 #include <drm/drm_print.h>
37 static u32 ast_get_vram_size(struct ast_private *ast)
44 vram_size = AST_VIDMEM_DEFAULT_SIZE;
45 jreg = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xaa, 0xff);
48 vram_size = AST_VIDMEM_SIZE_8M;
51 vram_size = AST_VIDMEM_SIZE_16M;
54 vram_size = AST_VIDMEM_SIZE_32M;
57 vram_size = AST_VIDMEM_SIZE_64M;
61 jreg = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0x99, 0xff);
62 switch (jreg & 0x03) {
64 vram_size -= 0x100000;
67 vram_size -= 0x200000;
70 vram_size -= 0x400000;
77 static void ast_mm_release(struct drm_device *dev, void *ptr)
79 struct ast_private *ast = to_ast_private(dev);
81 arch_phys_wc_del(ast->fb_mtrr);
82 arch_io_free_memtype_wc(pci_resource_start(dev->pdev, 0),
83 pci_resource_len(dev->pdev, 0));
86 int ast_mm_init(struct ast_private *ast)
88 struct drm_device *dev = &ast->base;
92 vram_size = ast_get_vram_size(ast);
94 ret = drmm_vram_helper_init(dev, pci_resource_start(dev->pdev, 0),
97 drm_err(dev, "Error initializing VRAM MM; %d\n", ret);
101 arch_io_reserve_memtype_wc(pci_resource_start(dev->pdev, 0),
102 pci_resource_len(dev->pdev, 0));
103 ast->fb_mtrr = arch_phys_wc_add(pci_resource_start(dev->pdev, 0),
104 pci_resource_len(dev->pdev, 0));
106 return drmm_add_action_or_reset(dev, ast_mm_release, NULL);