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	struct drm_device *dev = &ast->base;
89	u32 vram_size;
90	int ret;
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}
108