Commit | Line | Data |
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9797fbfb CW |
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 <eric@anholt.net> | |
25 | * Chris Wilson <chris@chris-wilson.co.uk> | |
26 | * | |
27 | */ | |
28 | ||
760285e7 DH |
29 | #include <drm/drmP.h> |
30 | #include <drm/i915_drm.h> | |
9797fbfb CW |
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 | ||
e12a2d53 | 45 | static unsigned long i915_stolen_to_physical(struct drm_device *dev) |
9797fbfb CW |
46 | { |
47 | struct drm_i915_private *dev_priv = dev->dev_private; | |
eaba1b8f | 48 | struct resource *r; |
9797fbfb CW |
49 | u32 base; |
50 | ||
17fec8a0 CW |
51 | /* Almost universally we can find the Graphics Base of Stolen Memory |
52 | * at offset 0x5c in the igfx configuration space. On a few (desktop) | |
53 | * machines this is also mirrored in the bridge device at different | |
54 | * locations, or in the MCHBAR. On gen2, the layout is again slightly | |
55 | * different with the Graphics Segment immediately following Top of | |
56 | * Memory (or Top of Usable DRAM). Note it appears that TOUD is only | |
57 | * reported by 865g, so we just use the top of memory as determined | |
58 | * by the e820 probe. | |
e12a2d53 | 59 | * |
17fec8a0 | 60 | * XXX However gen2 requires an unavailable symbol. |
9797fbfb | 61 | */ |
e12a2d53 | 62 | base = 0; |
17fec8a0 CW |
63 | if (INTEL_INFO(dev)->gen >= 3) { |
64 | /* Read Graphics Base of Stolen Memory directly */ | |
c9cddffc JB |
65 | pci_read_config_dword(dev->pdev, 0x5c, &base); |
66 | base &= ~((1<<20) - 1); | |
17fec8a0 | 67 | } else { /* GEN2 */ |
e12a2d53 | 68 | #if 0 |
e12a2d53 CW |
69 | /* Stolen is immediately above Top of Memory */ |
70 | base = max_low_pfn_mapped << PAGE_SHIFT; | |
9797fbfb | 71 | #endif |
e12a2d53 | 72 | } |
9797fbfb | 73 | |
eaba1b8f CW |
74 | if (base == 0) |
75 | return 0; | |
76 | ||
f1e1c212 VS |
77 | /* make sure we don't clobber the GTT if it's within stolen memory */ |
78 | if (INTEL_INFO(dev)->gen <= 4 && !IS_G33(dev) && !IS_G4X(dev)) { | |
79 | struct { | |
80 | u32 start, end; | |
81 | } stolen[2] = { | |
82 | { .start = base, .end = base + dev_priv->gtt.stolen_size, }, | |
83 | { .start = base, .end = base + dev_priv->gtt.stolen_size, }, | |
84 | }; | |
85 | u64 gtt_start, gtt_end; | |
86 | ||
87 | gtt_start = I915_READ(PGTBL_CTL); | |
88 | if (IS_GEN4(dev)) | |
89 | gtt_start = (gtt_start & PGTBL_ADDRESS_LO_MASK) | | |
90 | (gtt_start & PGTBL_ADDRESS_HI_MASK) << 28; | |
91 | else | |
92 | gtt_start &= PGTBL_ADDRESS_LO_MASK; | |
93 | gtt_end = gtt_start + gtt_total_entries(dev_priv->gtt) * 4; | |
94 | ||
95 | if (gtt_start >= stolen[0].start && gtt_start < stolen[0].end) | |
96 | stolen[0].end = gtt_start; | |
97 | if (gtt_end > stolen[1].start && gtt_end <= stolen[1].end) | |
98 | stolen[1].start = gtt_end; | |
99 | ||
100 | /* pick the larger of the two chunks */ | |
101 | if (stolen[0].end - stolen[0].start > | |
102 | stolen[1].end - stolen[1].start) { | |
103 | base = stolen[0].start; | |
104 | dev_priv->gtt.stolen_size = stolen[0].end - stolen[0].start; | |
105 | } else { | |
106 | base = stolen[1].start; | |
107 | dev_priv->gtt.stolen_size = stolen[1].end - stolen[1].start; | |
108 | } | |
109 | ||
110 | if (stolen[0].start != stolen[1].start || | |
111 | stolen[0].end != stolen[1].end) { | |
112 | DRM_DEBUG_KMS("GTT within stolen memory at 0x%llx-0x%llx\n", | |
113 | (unsigned long long) gtt_start, | |
114 | (unsigned long long) gtt_end - 1); | |
115 | DRM_DEBUG_KMS("Stolen memory adjusted to 0x%x-0x%x\n", | |
116 | base, base + (u32) dev_priv->gtt.stolen_size - 1); | |
117 | } | |
118 | } | |
119 | ||
120 | ||
eaba1b8f CW |
121 | /* Verify that nothing else uses this physical address. Stolen |
122 | * memory should be reserved by the BIOS and hidden from the | |
123 | * kernel. So if the region is already marked as busy, something | |
124 | * is seriously wrong. | |
125 | */ | |
126 | r = devm_request_mem_region(dev->dev, base, dev_priv->gtt.stolen_size, | |
127 | "Graphics Stolen Memory"); | |
128 | if (r == NULL) { | |
3617dc96 AG |
129 | /* |
130 | * One more attempt but this time requesting region from | |
131 | * base + 1, as we have seen that this resolves the region | |
132 | * conflict with the PCI Bus. | |
133 | * This is a BIOS w/a: Some BIOS wrap stolen in the root | |
134 | * PCI bus, but have an off-by-one error. Hence retry the | |
135 | * reservation starting from 1 instead of 0. | |
136 | */ | |
137 | r = devm_request_mem_region(dev->dev, base + 1, | |
138 | dev_priv->gtt.stolen_size - 1, | |
139 | "Graphics Stolen Memory"); | |
140 | if (r == NULL) { | |
141 | DRM_ERROR("conflict detected with stolen region: [0x%08x - 0x%08x]\n", | |
142 | base, base + (uint32_t)dev_priv->gtt.stolen_size); | |
143 | base = 0; | |
144 | } | |
eaba1b8f CW |
145 | } |
146 | ||
e12a2d53 | 147 | return base; |
9797fbfb CW |
148 | } |
149 | ||
edc0fdbb BW |
150 | static int find_compression_threshold(struct drm_device *dev, |
151 | struct drm_mm_node *node, | |
5e59f717 BW |
152 | int size, |
153 | int fb_cpp) | |
9797fbfb CW |
154 | { |
155 | struct drm_i915_private *dev_priv = dev->dev_private; | |
5e59f717 | 156 | int compression_threshold = 1; |
06e78edf | 157 | int ret; |
9797fbfb | 158 | |
5e59f717 BW |
159 | /* HACK: This code depends on what we will do in *_enable_fbc. If that |
160 | * code changes, this code needs to change as well. | |
161 | * | |
162 | * The enable_fbc code will attempt to use one of our 2 compression | |
163 | * thresholds, therefore, in that case, we only have 1 resort. | |
164 | */ | |
165 | ||
166 | /* Try to over-allocate to reduce reallocations and fragmentation. */ | |
edc0fdbb | 167 | ret = drm_mm_insert_node(&dev_priv->mm.stolen, node, |
06e78edf | 168 | size <<= 1, 4096, DRM_MM_SEARCH_DEFAULT); |
5e59f717 BW |
169 | if (ret == 0) |
170 | return compression_threshold; | |
171 | ||
172 | again: | |
173 | /* HW's ability to limit the CFB is 1:4 */ | |
174 | if (compression_threshold > 4 || | |
175 | (fb_cpp == 2 && compression_threshold == 2)) | |
edc0fdbb | 176 | return 0; |
5e59f717 BW |
177 | |
178 | ret = drm_mm_insert_node(&dev_priv->mm.stolen, node, | |
179 | size >>= 1, 4096, | |
180 | DRM_MM_SEARCH_DEFAULT); | |
181 | if (ret && INTEL_INFO(dev)->gen <= 4) { | |
182 | return 0; | |
183 | } else if (ret) { | |
184 | compression_threshold <<= 1; | |
185 | goto again; | |
186 | } else { | |
edc0fdbb | 187 | return compression_threshold; |
5e59f717 | 188 | } |
edc0fdbb BW |
189 | } |
190 | ||
5e59f717 | 191 | static int i915_setup_compression(struct drm_device *dev, int size, int fb_cpp) |
edc0fdbb BW |
192 | { |
193 | struct drm_i915_private *dev_priv = dev->dev_private; | |
194 | struct drm_mm_node *uninitialized_var(compressed_llb); | |
195 | int ret; | |
196 | ||
197 | ret = find_compression_threshold(dev, &dev_priv->fbc.compressed_fb, | |
5e59f717 | 198 | size, fb_cpp); |
edc0fdbb | 199 | if (!ret) |
06e78edf | 200 | goto err_llb; |
5e59f717 BW |
201 | else if (ret > 1) { |
202 | DRM_INFO("Reducing the compressed framebuffer size. This may lead to less power savings than a non-reduced-size. Try to increase stolen memory size if available in BIOS.\n"); | |
203 | ||
204 | } | |
205 | ||
206 | dev_priv->fbc.threshold = ret; | |
9797fbfb | 207 | |
11be49eb | 208 | if (HAS_PCH_SPLIT(dev)) |
c4213885 | 209 | I915_WRITE(ILK_DPFC_CB_BASE, dev_priv->fbc.compressed_fb.start); |
11be49eb | 210 | else if (IS_GM45(dev)) { |
c4213885 | 211 | I915_WRITE(DPFC_CB_BASE, dev_priv->fbc.compressed_fb.start); |
11be49eb | 212 | } else { |
06e78edf | 213 | compressed_llb = kzalloc(sizeof(*compressed_llb), GFP_KERNEL); |
9797fbfb CW |
214 | if (!compressed_llb) |
215 | goto err_fb; | |
216 | ||
06e78edf DH |
217 | ret = drm_mm_insert_node(&dev_priv->mm.stolen, compressed_llb, |
218 | 4096, 4096, DRM_MM_SEARCH_DEFAULT); | |
219 | if (ret) | |
220 | goto err_fb; | |
221 | ||
5c3fe8b0 | 222 | dev_priv->fbc.compressed_llb = compressed_llb; |
11be49eb CW |
223 | |
224 | I915_WRITE(FBC_CFB_BASE, | |
c4213885 | 225 | dev_priv->mm.stolen_base + dev_priv->fbc.compressed_fb.start); |
11be49eb CW |
226 | I915_WRITE(FBC_LL_BASE, |
227 | dev_priv->mm.stolen_base + compressed_llb->start); | |
9797fbfb CW |
228 | } |
229 | ||
5e59f717 | 230 | dev_priv->fbc.size = size / dev_priv->fbc.threshold; |
9797fbfb | 231 | |
11be49eb CW |
232 | DRM_DEBUG_KMS("reserved %d bytes of contiguous stolen space for FBC\n", |
233 | size); | |
9797fbfb | 234 | |
11be49eb | 235 | return 0; |
9797fbfb | 236 | |
9797fbfb | 237 | err_fb: |
06e78edf | 238 | kfree(compressed_llb); |
c4213885 | 239 | drm_mm_remove_node(&dev_priv->fbc.compressed_fb); |
06e78edf | 240 | err_llb: |
d8241785 | 241 | pr_info_once("drm: not enough stolen space for compressed buffer (need %d more bytes), disabling. Hint: you may be able to increase stolen memory size in the BIOS to avoid this.\n", size); |
11be49eb CW |
242 | return -ENOSPC; |
243 | } | |
244 | ||
5e59f717 | 245 | int i915_gem_stolen_setup_compression(struct drm_device *dev, int size, int fb_cpp) |
11be49eb CW |
246 | { |
247 | struct drm_i915_private *dev_priv = dev->dev_private; | |
248 | ||
446f8d81 | 249 | if (!drm_mm_initialized(&dev_priv->mm.stolen)) |
11be49eb CW |
250 | return -ENODEV; |
251 | ||
5c3fe8b0 | 252 | if (size < dev_priv->fbc.size) |
11be49eb CW |
253 | return 0; |
254 | ||
255 | /* Release any current block */ | |
256 | i915_gem_stolen_cleanup_compression(dev); | |
257 | ||
5e59f717 | 258 | return i915_setup_compression(dev, size, fb_cpp); |
9797fbfb CW |
259 | } |
260 | ||
11be49eb | 261 | void i915_gem_stolen_cleanup_compression(struct drm_device *dev) |
9797fbfb CW |
262 | { |
263 | struct drm_i915_private *dev_priv = dev->dev_private; | |
264 | ||
5c3fe8b0 | 265 | if (dev_priv->fbc.size == 0) |
11be49eb CW |
266 | return; |
267 | ||
c4213885 | 268 | drm_mm_remove_node(&dev_priv->fbc.compressed_fb); |
11be49eb | 269 | |
06e78edf DH |
270 | if (dev_priv->fbc.compressed_llb) { |
271 | drm_mm_remove_node(dev_priv->fbc.compressed_llb); | |
272 | kfree(dev_priv->fbc.compressed_llb); | |
273 | } | |
11be49eb | 274 | |
5c3fe8b0 | 275 | dev_priv->fbc.size = 0; |
9797fbfb CW |
276 | } |
277 | ||
278 | void i915_gem_cleanup_stolen(struct drm_device *dev) | |
279 | { | |
4d7bb011 DV |
280 | struct drm_i915_private *dev_priv = dev->dev_private; |
281 | ||
446f8d81 DV |
282 | if (!drm_mm_initialized(&dev_priv->mm.stolen)) |
283 | return; | |
284 | ||
11be49eb | 285 | i915_gem_stolen_cleanup_compression(dev); |
4d7bb011 | 286 | drm_mm_takedown(&dev_priv->mm.stolen); |
9797fbfb CW |
287 | } |
288 | ||
289 | int i915_gem_init_stolen(struct drm_device *dev) | |
290 | { | |
291 | struct drm_i915_private *dev_priv = dev->dev_private; | |
c9cddffc | 292 | int bios_reserved = 0; |
9797fbfb | 293 | |
0f4706d2 | 294 | #ifdef CONFIG_INTEL_IOMMU |
fcc9fe1a | 295 | if (intel_iommu_gfx_mapped && INTEL_INFO(dev)->gen < 8) { |
0f4706d2 CW |
296 | DRM_INFO("DMAR active, disabling use of stolen memory\n"); |
297 | return 0; | |
298 | } | |
299 | #endif | |
300 | ||
6644a4e9 CW |
301 | if (dev_priv->gtt.stolen_size == 0) |
302 | return 0; | |
303 | ||
e12a2d53 CW |
304 | dev_priv->mm.stolen_base = i915_stolen_to_physical(dev); |
305 | if (dev_priv->mm.stolen_base == 0) | |
306 | return 0; | |
307 | ||
a54c0c27 BW |
308 | DRM_DEBUG_KMS("found %zd bytes of stolen memory at %08lx\n", |
309 | dev_priv->gtt.stolen_size, dev_priv->mm.stolen_base); | |
e12a2d53 | 310 | |
c9cddffc JB |
311 | if (IS_VALLEYVIEW(dev)) |
312 | bios_reserved = 1024*1024; /* top 1M on VLV/BYT */ | |
313 | ||
897f9ed0 DV |
314 | if (WARN_ON(bios_reserved > dev_priv->gtt.stolen_size)) |
315 | return 0; | |
316 | ||
9797fbfb | 317 | /* Basic memrange allocator for stolen space */ |
c9cddffc JB |
318 | drm_mm_init(&dev_priv->mm.stolen, 0, dev_priv->gtt.stolen_size - |
319 | bios_reserved); | |
9797fbfb CW |
320 | |
321 | return 0; | |
322 | } | |
0104fdbb CW |
323 | |
324 | static struct sg_table * | |
325 | i915_pages_create_for_stolen(struct drm_device *dev, | |
326 | u32 offset, u32 size) | |
327 | { | |
328 | struct drm_i915_private *dev_priv = dev->dev_private; | |
329 | struct sg_table *st; | |
330 | struct scatterlist *sg; | |
331 | ||
332 | DRM_DEBUG_DRIVER("offset=0x%x, size=%d\n", offset, size); | |
a54c0c27 | 333 | BUG_ON(offset > dev_priv->gtt.stolen_size - size); |
0104fdbb CW |
334 | |
335 | /* We hide that we have no struct page backing our stolen object | |
336 | * by wrapping the contiguous physical allocation with a fake | |
337 | * dma mapping in a single scatterlist. | |
338 | */ | |
339 | ||
340 | st = kmalloc(sizeof(*st), GFP_KERNEL); | |
341 | if (st == NULL) | |
342 | return NULL; | |
343 | ||
344 | if (sg_alloc_table(st, 1, GFP_KERNEL)) { | |
345 | kfree(st); | |
346 | return NULL; | |
347 | } | |
348 | ||
349 | sg = st->sgl; | |
ec14ba47 | 350 | sg->offset = 0; |
ed23abdd | 351 | sg->length = size; |
0104fdbb CW |
352 | |
353 | sg_dma_address(sg) = (dma_addr_t)dev_priv->mm.stolen_base + offset; | |
354 | sg_dma_len(sg) = size; | |
355 | ||
356 | return st; | |
357 | } | |
358 | ||
359 | static int i915_gem_object_get_pages_stolen(struct drm_i915_gem_object *obj) | |
360 | { | |
361 | BUG(); | |
362 | return -EINVAL; | |
363 | } | |
364 | ||
365 | static void i915_gem_object_put_pages_stolen(struct drm_i915_gem_object *obj) | |
366 | { | |
367 | /* Should only be called during free */ | |
368 | sg_free_table(obj->pages); | |
369 | kfree(obj->pages); | |
370 | } | |
371 | ||
ef0cf27c CW |
372 | |
373 | static void | |
374 | i915_gem_object_release_stolen(struct drm_i915_gem_object *obj) | |
375 | { | |
376 | if (obj->stolen) { | |
377 | drm_mm_remove_node(obj->stolen); | |
378 | kfree(obj->stolen); | |
379 | obj->stolen = NULL; | |
380 | } | |
381 | } | |
0104fdbb CW |
382 | static const struct drm_i915_gem_object_ops i915_gem_object_stolen_ops = { |
383 | .get_pages = i915_gem_object_get_pages_stolen, | |
384 | .put_pages = i915_gem_object_put_pages_stolen, | |
ef0cf27c | 385 | .release = i915_gem_object_release_stolen, |
0104fdbb CW |
386 | }; |
387 | ||
388 | static struct drm_i915_gem_object * | |
389 | _i915_gem_object_create_stolen(struct drm_device *dev, | |
390 | struct drm_mm_node *stolen) | |
391 | { | |
392 | struct drm_i915_gem_object *obj; | |
393 | ||
42dcedd4 | 394 | obj = i915_gem_object_alloc(dev); |
0104fdbb CW |
395 | if (obj == NULL) |
396 | return NULL; | |
397 | ||
89c8233f | 398 | drm_gem_private_object_init(dev, &obj->base, stolen->size); |
0104fdbb CW |
399 | i915_gem_object_init(obj, &i915_gem_object_stolen_ops); |
400 | ||
401 | obj->pages = i915_pages_create_for_stolen(dev, | |
402 | stolen->start, stolen->size); | |
403 | if (obj->pages == NULL) | |
404 | goto cleanup; | |
405 | ||
406 | obj->has_dma_mapping = true; | |
dd53e1b0 | 407 | i915_gem_object_pin_pages(obj); |
0104fdbb CW |
408 | obj->stolen = stolen; |
409 | ||
d46f1c3f CW |
410 | obj->base.read_domains = I915_GEM_DOMAIN_CPU | I915_GEM_DOMAIN_GTT; |
411 | obj->cache_level = HAS_LLC(dev) ? I915_CACHE_LLC : I915_CACHE_NONE; | |
0104fdbb CW |
412 | |
413 | return obj; | |
414 | ||
415 | cleanup: | |
42dcedd4 | 416 | i915_gem_object_free(obj); |
0104fdbb CW |
417 | return NULL; |
418 | } | |
419 | ||
420 | struct drm_i915_gem_object * | |
421 | i915_gem_object_create_stolen(struct drm_device *dev, u32 size) | |
422 | { | |
423 | struct drm_i915_private *dev_priv = dev->dev_private; | |
424 | struct drm_i915_gem_object *obj; | |
425 | struct drm_mm_node *stolen; | |
06e78edf | 426 | int ret; |
0104fdbb | 427 | |
446f8d81 | 428 | if (!drm_mm_initialized(&dev_priv->mm.stolen)) |
0104fdbb CW |
429 | return NULL; |
430 | ||
431 | DRM_DEBUG_KMS("creating stolen object: size=%x\n", size); | |
432 | if (size == 0) | |
433 | return NULL; | |
434 | ||
06e78edf DH |
435 | stolen = kzalloc(sizeof(*stolen), GFP_KERNEL); |
436 | if (!stolen) | |
0104fdbb CW |
437 | return NULL; |
438 | ||
06e78edf DH |
439 | ret = drm_mm_insert_node(&dev_priv->mm.stolen, stolen, size, |
440 | 4096, DRM_MM_SEARCH_DEFAULT); | |
441 | if (ret) { | |
442 | kfree(stolen); | |
443 | return NULL; | |
444 | } | |
445 | ||
0104fdbb CW |
446 | obj = _i915_gem_object_create_stolen(dev, stolen); |
447 | if (obj) | |
448 | return obj; | |
449 | ||
06e78edf DH |
450 | drm_mm_remove_node(stolen); |
451 | kfree(stolen); | |
0104fdbb CW |
452 | return NULL; |
453 | } | |
454 | ||
866d12b4 CW |
455 | struct drm_i915_gem_object * |
456 | i915_gem_object_create_stolen_for_preallocated(struct drm_device *dev, | |
457 | u32 stolen_offset, | |
458 | u32 gtt_offset, | |
459 | u32 size) | |
460 | { | |
461 | struct drm_i915_private *dev_priv = dev->dev_private; | |
40d74980 | 462 | struct i915_address_space *ggtt = &dev_priv->gtt.base; |
866d12b4 CW |
463 | struct drm_i915_gem_object *obj; |
464 | struct drm_mm_node *stolen; | |
2f633156 | 465 | struct i915_vma *vma; |
b3a070cc | 466 | int ret; |
866d12b4 | 467 | |
446f8d81 | 468 | if (!drm_mm_initialized(&dev_priv->mm.stolen)) |
866d12b4 CW |
469 | return NULL; |
470 | ||
471 | DRM_DEBUG_KMS("creating preallocated stolen object: stolen_offset=%x, gtt_offset=%x, size=%x\n", | |
472 | stolen_offset, gtt_offset, size); | |
473 | ||
474 | /* KISS and expect everything to be page-aligned */ | |
475 | BUG_ON(stolen_offset & 4095); | |
866d12b4 CW |
476 | BUG_ON(size & 4095); |
477 | ||
478 | if (WARN_ON(size == 0)) | |
479 | return NULL; | |
480 | ||
b3a070cc BW |
481 | stolen = kzalloc(sizeof(*stolen), GFP_KERNEL); |
482 | if (!stolen) | |
483 | return NULL; | |
484 | ||
338710e7 BW |
485 | stolen->start = stolen_offset; |
486 | stolen->size = size; | |
487 | ret = drm_mm_reserve_node(&dev_priv->mm.stolen, stolen); | |
b3a070cc | 488 | if (ret) { |
866d12b4 | 489 | DRM_DEBUG_KMS("failed to allocate stolen space\n"); |
b3a070cc | 490 | kfree(stolen); |
866d12b4 CW |
491 | return NULL; |
492 | } | |
493 | ||
494 | obj = _i915_gem_object_create_stolen(dev, stolen); | |
495 | if (obj == NULL) { | |
496 | DRM_DEBUG_KMS("failed to allocate stolen object\n"); | |
06e78edf DH |
497 | drm_mm_remove_node(stolen); |
498 | kfree(stolen); | |
866d12b4 CW |
499 | return NULL; |
500 | } | |
501 | ||
3727d55e | 502 | /* Some objects just need physical mem from stolen space */ |
190d6cd5 | 503 | if (gtt_offset == I915_GTT_OFFSET_NONE) |
3727d55e JB |
504 | return obj; |
505 | ||
e656a6cb | 506 | vma = i915_gem_obj_lookup_or_create_vma(obj, ggtt); |
db473b36 DC |
507 | if (IS_ERR(vma)) { |
508 | ret = PTR_ERR(vma); | |
2f633156 BW |
509 | goto err_out; |
510 | } | |
511 | ||
866d12b4 CW |
512 | /* To simplify the initialisation sequence between KMS and GTT, |
513 | * we allow construction of the stolen object prior to | |
514 | * setting up the GTT space. The actual reservation will occur | |
515 | * later. | |
516 | */ | |
2f633156 BW |
517 | vma->node.start = gtt_offset; |
518 | vma->node.size = size; | |
40d74980 BW |
519 | if (drm_mm_initialized(&ggtt->mm)) { |
520 | ret = drm_mm_reserve_node(&ggtt->mm, &vma->node); | |
b3a070cc | 521 | if (ret) { |
866d12b4 | 522 | DRM_DEBUG_KMS("failed to allocate stolen GTT space\n"); |
4a025e26 | 523 | goto err_vma; |
866d12b4 | 524 | } |
edd41a87 | 525 | } |
866d12b4 | 526 | |
866d12b4 CW |
527 | obj->has_global_gtt_mapping = 1; |
528 | ||
35c20a60 | 529 | list_add_tail(&obj->global_list, &dev_priv->mm.bound_list); |
ca191b13 | 530 | list_add_tail(&vma->mm_list, &ggtt->inactive_list); |
d8ccba86 | 531 | i915_gem_object_pin_pages(obj); |
866d12b4 CW |
532 | |
533 | return obj; | |
b3a070cc | 534 | |
4a025e26 DV |
535 | err_vma: |
536 | i915_gem_vma_destroy(vma); | |
f7f18184 | 537 | err_out: |
32c913e4 DA |
538 | drm_mm_remove_node(stolen); |
539 | kfree(stolen); | |
b3a070cc BW |
540 | drm_gem_object_unreference(&obj->base); |
541 | return NULL; | |
866d12b4 | 542 | } |