Rev 3480 | Go to most recent revision | Details | Last modification | View Log | RSS feed
Rev | Author | Line No. | Line |
---|---|---|---|
3031 | serge | 1 | /* |
2 | * Copyright © 2008-2012 Intel Corporation |
||
3 | * |
||
4 | * Permission is hereby granted, free of charge, to any person obtaining a |
||
5 | * copy of this software and associated documentation files (the "Software"), |
||
6 | * to deal in the Software without restriction, including without limitation |
||
7 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
||
8 | * and/or sell copies of the Software, and to permit persons to whom the |
||
9 | * Software is furnished to do so, subject to the following conditions: |
||
10 | * |
||
11 | * The above copyright notice and this permission notice (including the next |
||
12 | * paragraph) shall be included in all copies or substantial portions of the |
||
13 | * Software. |
||
14 | * |
||
15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
||
16 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
||
17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
||
18 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
||
19 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
||
20 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS |
||
21 | * IN THE SOFTWARE. |
||
22 | * |
||
23 | * Authors: |
||
24 | * Eric Anholt |
||
25 | * Chris Wilson |
||
26 | * |
||
27 | */ |
||
28 | |||
29 | #include |
||
30 | #include |
||
31 | #include "i915_drv.h" |
||
32 | |||
33 | /* |
||
34 | * The BIOS typically reserves some of the system's memory for the exclusive |
||
35 | * use of the integrated graphics. This memory is no longer available for |
||
36 | * use by the OS and so the user finds that his system has less memory |
||
37 | * available than he put in. We refer to this memory as stolen. |
||
38 | * |
||
39 | * The BIOS will allocate its framebuffer from the stolen memory. Our |
||
40 | * goal is try to reuse that object for our own fbcon which must always |
||
41 | * be available for panics. Anything else we can reuse the stolen memory |
||
42 | * for is a boon. |
||
43 | */ |
||
44 | |||
45 | #define PTE_ADDRESS_MASK 0xfffff000 |
||
46 | #define PTE_ADDRESS_MASK_HIGH 0x000000f0 /* i915+ */ |
||
47 | #define PTE_MAPPING_TYPE_UNCACHED (0 << 1) |
||
48 | #define PTE_MAPPING_TYPE_DCACHE (1 << 1) /* i830 only */ |
||
49 | #define PTE_MAPPING_TYPE_CACHED (3 << 1) |
||
50 | #define PTE_MAPPING_TYPE_MASK (3 << 1) |
||
51 | #define PTE_VALID (1 << 0) |
||
52 | |||
53 | /** |
||
54 | * i915_stolen_to_phys - take an offset into stolen memory and turn it into |
||
55 | * a physical one |
||
56 | * @dev: drm device |
||
57 | * @offset: address to translate |
||
58 | * |
||
59 | * Some chip functions require allocations from stolen space and need the |
||
60 | * physical address of the memory in question. |
||
61 | */ |
||
62 | static unsigned long i915_stolen_to_phys(struct drm_device *dev, u32 offset) |
||
63 | { |
||
64 | struct drm_i915_private *dev_priv = dev->dev_private; |
||
65 | struct pci_dev *pdev = dev_priv->bridge_dev; |
||
66 | u32 base; |
||
67 | |||
68 | #if 0 |
||
69 | /* On the machines I have tested the Graphics Base of Stolen Memory |
||
70 | * is unreliable, so compute the base by subtracting the stolen memory |
||
71 | * from the Top of Low Usable DRAM which is where the BIOS places |
||
72 | * the graphics stolen memory. |
||
73 | */ |
||
74 | if (INTEL_INFO(dev)->gen > 3 || IS_G33(dev)) { |
||
75 | /* top 32bits are reserved = 0 */ |
||
76 | pci_read_config_dword(pdev, 0xA4, &base); |
||
77 | } else { |
||
78 | /* XXX presume 8xx is the same as i915 */ |
||
79 | pci_bus_read_config_dword(pdev->bus, 2, 0x5C, &base); |
||
80 | } |
||
81 | #else |
||
82 | if (INTEL_INFO(dev)->gen > 3 || IS_G33(dev)) { |
||
83 | u16 val; |
||
84 | pci_read_config_word(pdev, 0xb0, &val); |
||
85 | base = val >> 4 << 20; |
||
86 | } else { |
||
87 | u8 val; |
||
88 | pci_read_config_byte(pdev, 0x9c, &val); |
||
89 | base = val >> 3 << 27; |
||
90 | } |
||
91 | base -= dev_priv->mm.gtt->stolen_size; |
||
92 | #endif |
||
93 | |||
94 | return base + offset; |
||
95 | } |
||
96 | |||
97 | static void i915_warn_stolen(struct drm_device *dev) |
||
98 | { |
||
99 | DRM_INFO("not enough stolen space for compressed buffer, disabling\n"); |
||
100 | DRM_INFO("hint: you may be able to increase stolen memory size in the BIOS to avoid this\n"); |
||
101 | } |
||
102 | |||
103 | static void i915_setup_compression(struct drm_device *dev, int size) |
||
104 | { |
||
105 | struct drm_i915_private *dev_priv = dev->dev_private; |
||
106 | struct drm_mm_node *compressed_fb, *uninitialized_var(compressed_llb); |
||
107 | unsigned long cfb_base; |
||
108 | unsigned long ll_base = 0; |
||
109 | |||
110 | /* Just in case the BIOS is doing something questionable. */ |
||
111 | intel_disable_fbc(dev); |
||
112 | |||
113 | compressed_fb = drm_mm_search_free(&dev_priv->mm.stolen, size, 4096, 0); |
||
114 | if (compressed_fb) |
||
115 | compressed_fb = drm_mm_get_block(compressed_fb, size, 4096); |
||
116 | if (!compressed_fb) |
||
117 | goto err; |
||
118 | |||
119 | cfb_base = i915_stolen_to_phys(dev, compressed_fb->start); |
||
120 | if (!cfb_base) |
||
121 | goto err_fb; |
||
122 | |||
123 | if (!(IS_GM45(dev) || HAS_PCH_SPLIT(dev))) { |
||
124 | compressed_llb = drm_mm_search_free(&dev_priv->mm.stolen, |
||
125 | 4096, 4096, 0); |
||
126 | if (compressed_llb) |
||
127 | compressed_llb = drm_mm_get_block(compressed_llb, |
||
128 | 4096, 4096); |
||
129 | if (!compressed_llb) |
||
130 | goto err_fb; |
||
131 | |||
132 | ll_base = i915_stolen_to_phys(dev, compressed_llb->start); |
||
133 | if (!ll_base) |
||
134 | goto err_llb; |
||
135 | } |
||
136 | |||
137 | dev_priv->cfb_size = size; |
||
138 | |||
139 | dev_priv->compressed_fb = compressed_fb; |
||
140 | if (HAS_PCH_SPLIT(dev)) |
||
141 | I915_WRITE(ILK_DPFC_CB_BASE, compressed_fb->start); |
||
142 | else if (IS_GM45(dev)) { |
||
143 | I915_WRITE(DPFC_CB_BASE, compressed_fb->start); |
||
144 | } else { |
||
145 | I915_WRITE(FBC_CFB_BASE, cfb_base); |
||
146 | I915_WRITE(FBC_LL_BASE, ll_base); |
||
147 | dev_priv->compressed_llb = compressed_llb; |
||
148 | } |
||
149 | |||
150 | DRM_DEBUG_KMS("FBC base 0x%08lx, ll base 0x%08lx, size %dM\n", |
||
151 | cfb_base, ll_base, size >> 20); |
||
152 | return; |
||
153 | |||
154 | err_llb: |
||
155 | drm_mm_put_block(compressed_llb); |
||
156 | err_fb: |
||
157 | drm_mm_put_block(compressed_fb); |
||
158 | err: |
||
159 | dev_priv->no_fbc_reason = FBC_STOLEN_TOO_SMALL; |
||
160 | i915_warn_stolen(dev); |
||
161 | } |
||
162 | |||
163 | static void i915_cleanup_compression(struct drm_device *dev) |
||
164 | { |
||
165 | struct drm_i915_private *dev_priv = dev->dev_private; |
||
166 | |||
167 | drm_mm_put_block(dev_priv->compressed_fb); |
||
168 | if (dev_priv->compressed_llb) |
||
169 | drm_mm_put_block(dev_priv->compressed_llb); |
||
170 | } |
||
171 | |||
172 | void i915_gem_cleanup_stolen(struct drm_device *dev) |
||
173 | { |
||
174 | if (I915_HAS_FBC(dev) && i915_powersave) |
||
175 | i915_cleanup_compression(dev); |
||
176 | } |
||
177 | |||
178 | int i915_gem_init_stolen(struct drm_device *dev) |
||
179 | { |
||
180 | struct drm_i915_private *dev_priv = dev->dev_private; |
||
181 | unsigned long prealloc_size = dev_priv->mm.gtt->stolen_size; |
||
182 | |||
183 | /* Basic memrange allocator for stolen space */ |
||
184 | drm_mm_init(&dev_priv->mm.stolen, 0, prealloc_size); |
||
185 | |||
186 | /* Try to set up FBC with a reasonable compressed buffer size */ |
||
187 | if (I915_HAS_FBC(dev) && i915_powersave) { |
||
188 | int cfb_size; |
||
189 | |||
190 | /* Leave 1M for line length buffer & misc. */ |
||
191 | |||
192 | /* Try to get a 32M buffer... */ |
||
193 | if (prealloc_size > (36*1024*1024)) |
||
194 | cfb_size = 32*1024*1024; |
||
195 | else /* fall back to 7/8 of the stolen space */ |
||
196 | cfb_size = prealloc_size * 7 / 8; |
||
197 | i915_setup_compression(dev, cfb_size); |
||
198 | } |
||
199 | |||
200 | return 0; |
||
201 | }><>><>><>><>><>><>><> |