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Rev 3031 | Rev 3480 | ||
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Line 40... | Line 40... | ||
40 | * goal is try to reuse that object for our own fbcon which must always |
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 |
41 | * be available for panics. Anything else we can reuse the stolen memory |
42 | * for is a boon. |
42 | * for is a boon. |
43 | */ |
43 | */ |
Line 44... | Line -... | ||
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 | */ |
44 | |
62 | static unsigned long i915_stolen_to_phys(struct drm_device *dev, u32 offset) |
45 | static unsigned long i915_stolen_to_physical(struct drm_device *dev) |
63 | { |
46 | { |
64 | struct drm_i915_private *dev_priv = dev->dev_private; |
47 | struct drm_i915_private *dev_priv = dev->dev_private; |
65 | struct pci_dev *pdev = dev_priv->bridge_dev; |
48 | struct pci_dev *pdev = dev_priv->bridge_dev; |
Line 66... | Line -... | ||
66 | u32 base; |
- | |
67 | 49 | u32 base; |
|
68 | #if 0 |
50 | |
69 | /* On the machines I have tested the Graphics Base of Stolen Memory |
51 | /* On the machines I have tested the Graphics Base of Stolen Memory |
70 | * is unreliable, so compute the base by subtracting the stolen memory |
52 | * is unreliable, so on those compute the base by subtracting the |
- | 53 | * stolen memory from the Top of Low Usable DRAM which is where the |
|
- | 54 | * BIOS places the graphics stolen memory. |
|
- | 55 | * |
|
- | 56 | * On gen2, the layout is slightly different with the Graphics Segment |
|
- | 57 | * immediately following Top of Memory (or Top of Usable DRAM). Note |
|
- | 58 | * it appears that TOUD is only reported by 865g, so we just use the |
|
- | 59 | * top of memory as determined by the e820 probe. |
|
- | 60 | * |
|
- | 61 | * XXX gen2 requires an unavailable symbol and 945gm fails with |
|
- | 62 | * its value of TOLUD. |
|
- | 63 | */ |
|
- | 64 | base = 0; |
|
- | 65 | if (INTEL_INFO(dev)->gen >= 6) { |
|
- | 66 | /* Read Base Data of Stolen Memory Register (BDSM) directly. |
|
71 | * from the Top of Low Usable DRAM which is where the BIOS places |
67 | * Note that there is also a MCHBAR miror at 0x1080c0 or |
- | 68 | * we could use device 2:0x5c instead. |
|
- | 69 | */ |
|
72 | * the graphics stolen memory. |
70 | pci_read_config_dword(pdev, 0xB0, &base); |
73 | */ |
71 | base &= ~4095; /* lower bits used for locking register */ |
74 | if (INTEL_INFO(dev)->gen > 3 || IS_G33(dev)) { |
72 | } else 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); |
73 | /* Read Graphics Base of Stolen Memory directly */ |
80 | } |
74 | pci_read_config_dword(pdev, 0xA4, &base); |
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; |
75 | #if 0 |
- | 76 | } else if (IS_GEN3(dev)) { |
|
86 | } else { |
77 | u8 val; |
87 | u8 val; |
78 | /* Stolen is immediately below Top of Low Usable DRAM */ |
88 | pci_read_config_byte(pdev, 0x9c, &val); |
- | |
89 | base = val >> 3 << 27; |
79 | pci_read_config_byte(pdev, 0x9c, &val); |
- | 80 | base = val >> 3 << 27; |
|
- | 81 | base -= dev_priv->mm.gtt->stolen_size; |
|
- | 82 | } else { |
|
90 | } |
83 | /* Stolen is immediately above Top of Memory */ |
91 | base -= dev_priv->mm.gtt->stolen_size; |
- | |
92 | #endif |
- | |
93 | 84 | base = max_low_pfn_mapped << PAGE_SHIFT; |
|
Line 94... | Line 85... | ||
94 | return base + offset; |
85 | #endif |
95 | } |
- | |
96 | - | ||
97 | static void i915_warn_stolen(struct drm_device *dev) |
- | |
98 | { |
86 | } |
Line 99... | Line 87... | ||
99 | DRM_INFO("not enough stolen space for compressed buffer, disabling\n"); |
87 | |
100 | DRM_INFO("hint: you may be able to increase stolen memory size in the BIOS to avoid this\n"); |
88 | return base; |
101 | } |
89 | } |
102 | 90 | ||
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; |
- | |
Line -... | Line 91... | ||
- | 91 | static int i915_setup_compression(struct drm_device *dev, int size) |
|
108 | unsigned long ll_base = 0; |
92 | { |
- | 93 | struct drm_i915_private *dev_priv = dev->dev_private; |
|
- | 94 | struct drm_mm_node *compressed_fb, *uninitialized_var(compressed_llb); |
|
- | 95 | ||
- | 96 | /* Try to over-allocate to reduce reallocations and fragmentation */ |
|
109 | 97 | compressed_fb = drm_mm_search_free(&dev_priv->mm.stolen, |
|
110 | /* Just in case the BIOS is doing something questionable. */ |
98 | size <<= 1, 4096, 0); |
111 | intel_disable_fbc(dev); |
99 | if (!compressed_fb) |
112 | 100 | compressed_fb = drm_mm_search_free(&dev_priv->mm.stolen, |
|
Line -... | Line 101... | ||
- | 101 | size >>= 1, 4096, 0); |
|
113 | compressed_fb = drm_mm_search_free(&dev_priv->mm.stolen, size, 4096, 0); |
102 | if (compressed_fb) |
114 | if (compressed_fb) |
103 | compressed_fb = drm_mm_get_block(compressed_fb, size, 4096); |
- | 104 | if (!compressed_fb) |
|
115 | compressed_fb = drm_mm_get_block(compressed_fb, size, 4096); |
105 | goto err; |
116 | if (!compressed_fb) |
- | |
117 | goto err; |
- | |
118 | 106 | ||
119 | cfb_base = i915_stolen_to_phys(dev, compressed_fb->start); |
107 | if (HAS_PCH_SPLIT(dev)) |
120 | if (!cfb_base) |
108 | I915_WRITE(ILK_DPFC_CB_BASE, compressed_fb->start); |
121 | goto err_fb; |
109 | else if (IS_GM45(dev)) { |
122 | 110 | I915_WRITE(DPFC_CB_BASE, compressed_fb->start); |
|
123 | if (!(IS_GM45(dev) || HAS_PCH_SPLIT(dev))) { |
111 | } else { |
124 | compressed_llb = drm_mm_search_free(&dev_priv->mm.stolen, |
112 | compressed_llb = drm_mm_search_free(&dev_priv->mm.stolen, |
Line -... | Line 113... | ||
- | 113 | 4096, 4096, 0); |
|
- | 114 | if (compressed_llb) |
|
- | 115 | compressed_llb = drm_mm_get_block(compressed_llb, |
|
125 | 4096, 4096, 0); |
116 | 4096, 4096); |
126 | if (compressed_llb) |
117 | if (!compressed_llb) |
127 | compressed_llb = drm_mm_get_block(compressed_llb, |
118 | goto err_fb; |
128 | 4096, 4096); |
119 | |
Line -... | Line 120... | ||
- | 120 | dev_priv->compressed_llb = compressed_llb; |
|
129 | if (!compressed_llb) |
121 | |
Line 130... | Line 122... | ||
130 | goto err_fb; |
122 | I915_WRITE(FBC_CFB_BASE, |
131 | - | ||
132 | ll_base = i915_stolen_to_phys(dev, compressed_llb->start); |
- | |
133 | if (!ll_base) |
- | |
134 | goto err_llb; |
- | |
135 | } |
123 | dev_priv->mm.stolen_base + compressed_fb->start); |
136 | - | ||
137 | dev_priv->cfb_size = size; |
- | |
138 | - | ||
139 | dev_priv->compressed_fb = compressed_fb; |
- | |
Line 140... | Line -... | ||
140 | if (HAS_PCH_SPLIT(dev)) |
- | |
141 | I915_WRITE(ILK_DPFC_CB_BASE, compressed_fb->start); |
- | |
142 | else if (IS_GM45(dev)) { |
124 | I915_WRITE(FBC_LL_BASE, |
Line 143... | Line -... | ||
143 | I915_WRITE(DPFC_CB_BASE, compressed_fb->start); |
- | |
144 | } else { |
- | |
145 | I915_WRITE(FBC_CFB_BASE, cfb_base); |
125 | dev_priv->mm.stolen_base + compressed_llb->start); |
146 | I915_WRITE(FBC_LL_BASE, ll_base); |
126 | } |
147 | dev_priv->compressed_llb = compressed_llb; |
127 | |
- | 128 | dev_priv->compressed_fb = compressed_fb; |
|
- | 129 | dev_priv->cfb_size = size; |
|
- | 130 | ||
- | 131 | DRM_DEBUG_KMS("reserved %d bytes of contiguous stolen space for FBC\n", |
|
- | 132 | size); |
|
- | 133 | ||
- | 134 | return 0; |
|
148 | } |
135 | |
- | 136 | err_fb: |
|
- | 137 | drm_mm_put_block(compressed_fb); |
|
- | 138 | err: |
|
- | 139 | return -ENOSPC; |
|
- | 140 | } |
|
- | 141 | ||
149 | 142 | int i915_gem_stolen_setup_compression(struct drm_device *dev, int size) |
|
- | 143 | { |
|
- | 144 | struct drm_i915_private *dev_priv = dev->dev_private; |
|
150 | DRM_DEBUG_KMS("FBC base 0x%08lx, ll base 0x%08lx, size %dM\n", |
145 | |
Line 151... | Line 146... | ||
151 | cfb_base, ll_base, size >> 20); |
146 | if (dev_priv->mm.stolen_base == 0) |
152 | return; |
147 | return -ENODEV; |
153 | 148 | ||
Line -... | Line 149... | ||
- | 149 | if (size < dev_priv->cfb_size) |
|
- | 150 | return 0; |
|
- | 151 | ||
- | 152 | /* Release any current block */ |
|
154 | err_llb: |
153 | i915_gem_stolen_cleanup_compression(dev); |
- | 154 | ||
155 | drm_mm_put_block(compressed_llb); |
155 | return i915_setup_compression(dev, size); |
156 | err_fb: |
156 | } |
- | 157 | ||
- | 158 | void i915_gem_stolen_cleanup_compression(struct drm_device *dev) |
|
157 | drm_mm_put_block(compressed_fb); |
159 | { |
Line 158... | Line 160... | ||
158 | err: |
160 | struct drm_i915_private *dev_priv = dev->dev_private; |
159 | dev_priv->no_fbc_reason = FBC_STOLEN_TOO_SMALL; |
161 | |
160 | i915_warn_stolen(dev); |
162 | if (dev_priv->cfb_size == 0) |
- | 163 | return; |
|
161 | } |
164 | |
- | 165 | if (dev_priv->compressed_fb) |
|
162 | 166 | drm_mm_put_block(dev_priv->compressed_fb); |
|
Line 163... | Line 167... | ||
163 | static void i915_cleanup_compression(struct drm_device *dev) |
167 | |
164 | { |
168 | if (dev_priv->compressed_llb) |
165 | struct drm_i915_private *dev_priv = dev->dev_private; |
169 | drm_mm_put_block(dev_priv->compressed_llb); |
- | 170 | ||
- | 171 | dev_priv->cfb_size = 0; |
|
- | 172 | } |
|
- | 173 | ||
- | 174 | void i915_gem_cleanup_stolen(struct drm_device *dev) |
|
- | 175 | { |
|
166 | 176 | struct drm_i915_private *dev_priv = dev->dev_private; |
|
Line 167... | Line 177... | ||
167 | drm_mm_put_block(dev_priv->compressed_fb); |
177 | |
168 | if (dev_priv->compressed_llb) |
178 | i915_gem_stolen_cleanup_compression(dev); |
Line 169... | Line -... | ||
169 | drm_mm_put_block(dev_priv->compressed_llb); |
- | |
170 | } |
- | |
171 | 179 | drm_mm_takedown(&dev_priv->mm.stolen); |
|
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; |
180 | } |
Line -... | Line 181... | ||
- | 181 | ||
- | 182 | int i915_gem_init_stolen(struct drm_device *dev) |
|
- | 183 | { |
|
- | 184 | struct drm_i915_private *dev_priv = dev->dev_private; |
|
- | 185 | ||
- | 186 | dev_priv->mm.stolen_base = i915_stolen_to_physical(dev); |
|
- | 187 | if (dev_priv->mm.stolen_base == 0) |
|
- | 188 | return 0; |
|
- | 189 | ||
- | 190 | DRM_DEBUG_KMS("found %zd bytes of stolen memory at %08lx\n", |
|
- | 191 | dev_priv->gtt.stolen_size, dev_priv->mm.stolen_base); |
|
- | 192 | ||
- | 193 | /* Basic memrange allocator for stolen space */ |
|
- | 194 | drm_mm_init(&dev_priv->mm.stolen, 0, dev_priv->gtt.stolen_size); |
|
- | 195 | ||
- | 196 | return 0; |
|
- | 197 | } |
|
- | 198 | ||
- | 199 | static struct sg_table * |
|
- | 200 | i915_pages_create_for_stolen(struct drm_device *dev, |
|
- | 201 | u32 offset, u32 size) |
|
- | 202 | { |
|
- | 203 | struct drm_i915_private *dev_priv = dev->dev_private; |
|
- | 204 | struct sg_table *st; |
|
- | 205 | struct scatterlist *sg; |
|
- | 206 | ||
- | 207 | DRM_DEBUG_DRIVER("offset=0x%x, size=%d\n", offset, size); |
|
- | 208 | BUG_ON(offset > dev_priv->gtt.stolen_size - size); |
|
- | 209 | ||
- | 210 | /* We hide that we have no struct page backing our stolen object |
|
- | 211 | * by wrapping the contiguous physical allocation with a fake |
|
- | 212 | * dma mapping in a single scatterlist. |
|
182 | 213 | */ |
|
- | 214 | ||
- | 215 | st = kmalloc(sizeof(*st), GFP_KERNEL); |
|
- | 216 | if (st == NULL) |
|
- | 217 | return NULL; |
|
- | 218 | ||
- | 219 | if (sg_alloc_table(st, 1, GFP_KERNEL)) { |
|
- | 220 | kfree(st); |
|
- | 221 | return NULL; |
|
- | 222 | } |
|
- | 223 | ||
- | 224 | sg = st->sgl; |
|
- | 225 | sg->offset = offset; |
|
- | 226 | sg->length = size; |
|
- | 227 | ||
- | 228 | sg_dma_address(sg) = (dma_addr_t)dev_priv->mm.stolen_base + offset; |
|
- | 229 | sg_dma_len(sg) = size; |
|
- | 230 | ||
- | 231 | return st; |
|
- | 232 | } |
|
- | 233 | ||
- | 234 | static int i915_gem_object_get_pages_stolen(struct drm_i915_gem_object *obj) |
|
- | 235 | { |
|
- | 236 | BUG(); |
|
- | 237 | return -EINVAL; |
|
- | 238 | } |
|
- | 239 | ||
- | 240 | static void i915_gem_object_put_pages_stolen(struct drm_i915_gem_object *obj) |
|
- | 241 | { |
|
- | 242 | /* Should only be called during free */ |
|
- | 243 | sg_free_table(obj->pages); |
|
- | 244 | kfree(obj->pages); |
|
- | 245 | } |
|
- | 246 | ||
- | 247 | static const struct drm_i915_gem_object_ops i915_gem_object_stolen_ops = { |
|
- | 248 | .get_pages = i915_gem_object_get_pages_stolen, |
|
- | 249 | .put_pages = i915_gem_object_put_pages_stolen, |
|
- | 250 | }; |
|
- | 251 | ||
- | 252 | static struct drm_i915_gem_object * |
|
- | 253 | _i915_gem_object_create_stolen(struct drm_device *dev, |
|
- | 254 | struct drm_mm_node *stolen) |
|
- | 255 | { |
|
- | 256 | struct drm_i915_gem_object *obj; |
|
- | 257 | ||
- | 258 | obj = i915_gem_object_alloc(dev); |
|
- | 259 | if (obj == NULL) |
|
- | 260 | return NULL; |
|
- | 261 | ||
- | 262 | if (drm_gem_private_object_init(dev, &obj->base, stolen->size)) |
|
- | 263 | goto cleanup; |
|
- | 264 | ||
- | 265 | i915_gem_object_init(obj, &i915_gem_object_stolen_ops); |
|
- | 266 | ||
- | 267 | obj->pages = i915_pages_create_for_stolen(dev, |
|
- | 268 | stolen->start, stolen->size); |
|
- | 269 | if (obj->pages == NULL) |
|
- | 270 | goto cleanup; |
|
- | 271 | ||
- | 272 | obj->has_dma_mapping = true; |
|
- | 273 | obj->pages_pin_count = 1; |
|
- | 274 | obj->stolen = stolen; |
|
- | 275 | ||
- | 276 | obj->base.write_domain = I915_GEM_DOMAIN_GTT; |
|
- | 277 | obj->base.read_domains = I915_GEM_DOMAIN_GTT; |
|
- | 278 | obj->cache_level = I915_CACHE_NONE; |
|
- | 279 | ||
- | 280 | return obj; |
|
- | 281 | ||
- | 282 | cleanup: |
|
- | 283 | i915_gem_object_free(obj); |
|
- | 284 | return NULL; |
|
- | 285 | } |
|
- | 286 | ||
- | 287 | struct drm_i915_gem_object * |
|
- | 288 | i915_gem_object_create_stolen(struct drm_device *dev, u32 size) |
|
- | 289 | { |
|
- | 290 | struct drm_i915_private *dev_priv = dev->dev_private; |
|
- | 291 | struct drm_i915_gem_object *obj; |
|
- | 292 | struct drm_mm_node *stolen; |
|
- | 293 | ||
- | 294 | if (dev_priv->mm.stolen_base == 0) |
|
- | 295 | return NULL; |
|
- | 296 | ||
- | 297 | DRM_DEBUG_KMS("creating stolen object: size=%x\n", size); |
|
- | 298 | if (size == 0) |
|
- | 299 | return NULL; |
|
- | 300 | ||
- | 301 | stolen = drm_mm_search_free(&dev_priv->mm.stolen, size, 4096, 0); |
|
- | 302 | if (stolen) |
|
- | 303 | stolen = drm_mm_get_block(stolen, size, 4096); |
|
183 | /* Basic memrange allocator for stolen space */ |
304 | if (stolen == NULL) |