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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
37static 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
77static void ast_mm_release(struct drm_device *dev, void *ptr)
78{
79 struct ast_private *ast = to_ast_private(dev);
80
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));
84}
85
86int ast_mm_init(struct ast_private *ast)
87{
88 u32 vram_size;
89 int ret;
90 struct drm_device *dev = ast->dev;
91
92 vram_size = ast_get_vram_size(ast);
93
94 ret = drmm_vram_helper_init(dev, pci_resource_start(dev->pdev, 0),
95 vram_size);
96 if (ret) {
97 drm_err(dev, "Error initializing VRAM MM; %d\n", ret);
98 return ret;
99 }
100
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));
105
106 return drmm_add_action_or_reset(dev, ast_mm_release, NULL);
107}
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_managed.h>
32#include <drm/drm_print.h>
33
34#include "ast_drv.h"
35
36static u32 ast_get_vram_size(struct ast_private *ast)
37{
38 u8 jreg;
39 u32 vram_size;
40
41 ast_open_key(ast);
42
43 vram_size = AST_VIDMEM_DEFAULT_SIZE;
44 jreg = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xaa, 0xff);
45 switch (jreg & 3) {
46 case 0:
47 vram_size = AST_VIDMEM_SIZE_8M;
48 break;
49 case 1:
50 vram_size = AST_VIDMEM_SIZE_16M;
51 break;
52 case 2:
53 vram_size = AST_VIDMEM_SIZE_32M;
54 break;
55 case 3:
56 vram_size = AST_VIDMEM_SIZE_64M;
57 break;
58 }
59
60 jreg = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0x99, 0xff);
61 switch (jreg & 0x03) {
62 case 1:
63 vram_size -= 0x100000;
64 break;
65 case 2:
66 vram_size -= 0x200000;
67 break;
68 case 3:
69 vram_size -= 0x400000;
70 break;
71 }
72
73 return vram_size;
74}
75
76int ast_mm_init(struct ast_private *ast)
77{
78 struct drm_device *dev = &ast->base;
79 struct pci_dev *pdev = to_pci_dev(dev->dev);
80 resource_size_t base, size;
81 u32 vram_size;
82
83 base = pci_resource_start(pdev, 0);
84 size = pci_resource_len(pdev, 0);
85
86 /* Don't fail on errors, but performance might be reduced. */
87 devm_arch_io_reserve_memtype_wc(dev->dev, base, size);
88 devm_arch_phys_wc_add(dev->dev, base, size);
89
90 vram_size = ast_get_vram_size(ast);
91
92 ast->vram = devm_ioremap_wc(dev->dev, base, vram_size);
93 if (!ast->vram)
94 return -ENOMEM;
95
96 ast->vram_base = base;
97 ast->vram_size = vram_size;
98 ast->vram_fb_available = vram_size;
99
100 return 0;
101}