1 /*
2 * Copyright 2012 Red Hat Inc.
3 *
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:
11 *
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
15 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
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.
19 *
20 * The above copyright notice and this permission notice (including the
21 * next paragraph) shall be included in all copies or substantial portions
22 * of the Software.
23 *
24 */
25 /*
26 * Authors: Dave Airlie <airlied@redhat.com>
27 */
28
29 #include <linux/pci.h>
30
31 #include <drm/drm_gem_vram_helper.h>
32 #include <drm/drm_managed.h>
33 #include <drm/drm_print.h>
34
35 #include "ast_drv.h"
36
ast_get_vram_size(struct ast_private * ast)37 static u32 ast_get_vram_size(struct ast_private *ast)
38 {
39 u8 jreg;
40 u32 vram_size;
41
42 ast_open_key(ast);
43
44 vram_size = AST_VIDMEM_DEFAULT_SIZE;
45 jreg = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xaa, 0xff);
46 switch (jreg & 3) {
47 case 0:
48 vram_size = AST_VIDMEM_SIZE_8M;
49 break;
50 case 1:
51 vram_size = AST_VIDMEM_SIZE_16M;
52 break;
53 case 2:
54 vram_size = AST_VIDMEM_SIZE_32M;
55 break;
56 case 3:
57 vram_size = AST_VIDMEM_SIZE_64M;
58 break;
59 }
60
61 jreg = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0x99, 0xff);
62 switch (jreg & 0x03) {
63 case 1:
64 vram_size -= 0x100000;
65 break;
66 case 2:
67 vram_size -= 0x200000;
68 break;
69 case 3:
70 vram_size -= 0x400000;
71 break;
72 }
73
74 return vram_size;
75 }
76
ast_mm_init(struct ast_private * ast)77 int ast_mm_init(struct ast_private *ast)
78 {
79 struct drm_device *dev = &ast->base;
80 struct pci_dev *pdev = to_pci_dev(dev->dev);
81 resource_size_t base, size;
82 u32 vram_size;
83 int ret;
84
85 base = pci_resource_start(pdev, 0);
86 size = pci_resource_len(pdev, 0);
87
88 /* Don't fail on errors, but performance might be reduced. */
89 devm_arch_io_reserve_memtype_wc(dev->dev, base, size);
90 devm_arch_phys_wc_add(dev->dev, base, size);
91
92 vram_size = ast_get_vram_size(ast);
93
94 ret = drmm_vram_helper_init(dev, base, vram_size);
95 if (ret) {
96 drm_err(dev, "Error initializing VRAM MM; %d\n", ret);
97 return ret;
98 }
99
100 return 0;
101 }
102