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 | ||
d713fd49 PZ |
45 | int i915_gem_stolen_insert_node(struct drm_i915_private *dev_priv, |
46 | struct drm_mm_node *node, u64 size, | |
47 | unsigned alignment) | |
48 | { | |
92e97d2f PZ |
49 | int ret; |
50 | ||
d713fd49 PZ |
51 | if (!drm_mm_initialized(&dev_priv->mm.stolen)) |
52 | return -ENODEV; | |
53 | ||
92e97d2f PZ |
54 | mutex_lock(&dev_priv->mm.stolen_lock); |
55 | ret = drm_mm_insert_node(&dev_priv->mm.stolen, node, size, alignment, | |
56 | DRM_MM_SEARCH_DEFAULT); | |
57 | mutex_unlock(&dev_priv->mm.stolen_lock); | |
58 | ||
59 | return ret; | |
d713fd49 PZ |
60 | } |
61 | ||
62 | void i915_gem_stolen_remove_node(struct drm_i915_private *dev_priv, | |
63 | struct drm_mm_node *node) | |
64 | { | |
92e97d2f | 65 | mutex_lock(&dev_priv->mm.stolen_lock); |
d713fd49 | 66 | drm_mm_remove_node(node); |
92e97d2f | 67 | mutex_unlock(&dev_priv->mm.stolen_lock); |
d713fd49 PZ |
68 | } |
69 | ||
e12a2d53 | 70 | static unsigned long i915_stolen_to_physical(struct drm_device *dev) |
9797fbfb CW |
71 | { |
72 | struct drm_i915_private *dev_priv = dev->dev_private; | |
eaba1b8f | 73 | struct resource *r; |
9797fbfb CW |
74 | u32 base; |
75 | ||
17fec8a0 CW |
76 | /* Almost universally we can find the Graphics Base of Stolen Memory |
77 | * at offset 0x5c in the igfx configuration space. On a few (desktop) | |
78 | * machines this is also mirrored in the bridge device at different | |
79 | * locations, or in the MCHBAR. On gen2, the layout is again slightly | |
80 | * different with the Graphics Segment immediately following Top of | |
81 | * Memory (or Top of Usable DRAM). Note it appears that TOUD is only | |
82 | * reported by 865g, so we just use the top of memory as determined | |
83 | * by the e820 probe. | |
e12a2d53 | 84 | * |
17fec8a0 | 85 | * XXX However gen2 requires an unavailable symbol. |
9797fbfb | 86 | */ |
e12a2d53 | 87 | base = 0; |
17fec8a0 CW |
88 | if (INTEL_INFO(dev)->gen >= 3) { |
89 | /* Read Graphics Base of Stolen Memory directly */ | |
c9cddffc JB |
90 | pci_read_config_dword(dev->pdev, 0x5c, &base); |
91 | base &= ~((1<<20) - 1); | |
17fec8a0 | 92 | } else { /* GEN2 */ |
e12a2d53 | 93 | #if 0 |
e12a2d53 CW |
94 | /* Stolen is immediately above Top of Memory */ |
95 | base = max_low_pfn_mapped << PAGE_SHIFT; | |
9797fbfb | 96 | #endif |
e12a2d53 | 97 | } |
9797fbfb | 98 | |
eaba1b8f CW |
99 | if (base == 0) |
100 | return 0; | |
101 | ||
f1e1c212 VS |
102 | /* make sure we don't clobber the GTT if it's within stolen memory */ |
103 | if (INTEL_INFO(dev)->gen <= 4 && !IS_G33(dev) && !IS_G4X(dev)) { | |
104 | struct { | |
105 | u32 start, end; | |
106 | } stolen[2] = { | |
107 | { .start = base, .end = base + dev_priv->gtt.stolen_size, }, | |
108 | { .start = base, .end = base + dev_priv->gtt.stolen_size, }, | |
109 | }; | |
110 | u64 gtt_start, gtt_end; | |
111 | ||
112 | gtt_start = I915_READ(PGTBL_CTL); | |
113 | if (IS_GEN4(dev)) | |
114 | gtt_start = (gtt_start & PGTBL_ADDRESS_LO_MASK) | | |
115 | (gtt_start & PGTBL_ADDRESS_HI_MASK) << 28; | |
116 | else | |
117 | gtt_start &= PGTBL_ADDRESS_LO_MASK; | |
118 | gtt_end = gtt_start + gtt_total_entries(dev_priv->gtt) * 4; | |
119 | ||
120 | if (gtt_start >= stolen[0].start && gtt_start < stolen[0].end) | |
121 | stolen[0].end = gtt_start; | |
122 | if (gtt_end > stolen[1].start && gtt_end <= stolen[1].end) | |
123 | stolen[1].start = gtt_end; | |
124 | ||
125 | /* pick the larger of the two chunks */ | |
126 | if (stolen[0].end - stolen[0].start > | |
127 | stolen[1].end - stolen[1].start) { | |
128 | base = stolen[0].start; | |
129 | dev_priv->gtt.stolen_size = stolen[0].end - stolen[0].start; | |
130 | } else { | |
131 | base = stolen[1].start; | |
132 | dev_priv->gtt.stolen_size = stolen[1].end - stolen[1].start; | |
133 | } | |
134 | ||
135 | if (stolen[0].start != stolen[1].start || | |
136 | stolen[0].end != stolen[1].end) { | |
137 | DRM_DEBUG_KMS("GTT within stolen memory at 0x%llx-0x%llx\n", | |
138 | (unsigned long long) gtt_start, | |
139 | (unsigned long long) gtt_end - 1); | |
140 | DRM_DEBUG_KMS("Stolen memory adjusted to 0x%x-0x%x\n", | |
141 | base, base + (u32) dev_priv->gtt.stolen_size - 1); | |
142 | } | |
143 | } | |
144 | ||
145 | ||
eaba1b8f CW |
146 | /* Verify that nothing else uses this physical address. Stolen |
147 | * memory should be reserved by the BIOS and hidden from the | |
148 | * kernel. So if the region is already marked as busy, something | |
149 | * is seriously wrong. | |
150 | */ | |
151 | r = devm_request_mem_region(dev->dev, base, dev_priv->gtt.stolen_size, | |
152 | "Graphics Stolen Memory"); | |
153 | if (r == NULL) { | |
3617dc96 AG |
154 | /* |
155 | * One more attempt but this time requesting region from | |
156 | * base + 1, as we have seen that this resolves the region | |
157 | * conflict with the PCI Bus. | |
158 | * This is a BIOS w/a: Some BIOS wrap stolen in the root | |
159 | * PCI bus, but have an off-by-one error. Hence retry the | |
160 | * reservation starting from 1 instead of 0. | |
161 | */ | |
162 | r = devm_request_mem_region(dev->dev, base + 1, | |
163 | dev_priv->gtt.stolen_size - 1, | |
164 | "Graphics Stolen Memory"); | |
0b6d24c0 DV |
165 | /* |
166 | * GEN3 firmware likes to smash pci bridges into the stolen | |
167 | * range. Apparently this works. | |
168 | */ | |
169 | if (r == NULL && !IS_GEN3(dev)) { | |
3617dc96 AG |
170 | DRM_ERROR("conflict detected with stolen region: [0x%08x - 0x%08x]\n", |
171 | base, base + (uint32_t)dev_priv->gtt.stolen_size); | |
172 | base = 0; | |
173 | } | |
eaba1b8f CW |
174 | } |
175 | ||
e12a2d53 | 176 | return base; |
9797fbfb CW |
177 | } |
178 | ||
9797fbfb CW |
179 | void i915_gem_cleanup_stolen(struct drm_device *dev) |
180 | { | |
4d7bb011 DV |
181 | struct drm_i915_private *dev_priv = dev->dev_private; |
182 | ||
446f8d81 DV |
183 | if (!drm_mm_initialized(&dev_priv->mm.stolen)) |
184 | return; | |
185 | ||
4d7bb011 | 186 | drm_mm_takedown(&dev_priv->mm.stolen); |
9797fbfb CW |
187 | } |
188 | ||
3774eb50 PZ |
189 | static void gen6_get_stolen_reserved(struct drm_i915_private *dev_priv, |
190 | unsigned long *base, unsigned long *size) | |
191 | { | |
192 | uint32_t reg_val = I915_READ(GEN6_STOLEN_RESERVED); | |
193 | ||
194 | *base = reg_val & GEN6_STOLEN_RESERVED_ADDR_MASK; | |
195 | ||
196 | switch (reg_val & GEN6_STOLEN_RESERVED_SIZE_MASK) { | |
197 | case GEN6_STOLEN_RESERVED_1M: | |
198 | *size = 1024 * 1024; | |
199 | break; | |
200 | case GEN6_STOLEN_RESERVED_512K: | |
201 | *size = 512 * 1024; | |
202 | break; | |
203 | case GEN6_STOLEN_RESERVED_256K: | |
204 | *size = 256 * 1024; | |
205 | break; | |
206 | case GEN6_STOLEN_RESERVED_128K: | |
207 | *size = 128 * 1024; | |
208 | break; | |
209 | default: | |
210 | *size = 1024 * 1024; | |
211 | MISSING_CASE(reg_val & GEN6_STOLEN_RESERVED_SIZE_MASK); | |
212 | } | |
213 | } | |
214 | ||
215 | static void gen7_get_stolen_reserved(struct drm_i915_private *dev_priv, | |
216 | unsigned long *base, unsigned long *size) | |
217 | { | |
218 | uint32_t reg_val = I915_READ(GEN6_STOLEN_RESERVED); | |
219 | ||
220 | *base = reg_val & GEN7_STOLEN_RESERVED_ADDR_MASK; | |
221 | ||
222 | switch (reg_val & GEN7_STOLEN_RESERVED_SIZE_MASK) { | |
223 | case GEN7_STOLEN_RESERVED_1M: | |
224 | *size = 1024 * 1024; | |
225 | break; | |
226 | case GEN7_STOLEN_RESERVED_256K: | |
227 | *size = 256 * 1024; | |
228 | break; | |
229 | default: | |
230 | *size = 1024 * 1024; | |
231 | MISSING_CASE(reg_val & GEN7_STOLEN_RESERVED_SIZE_MASK); | |
232 | } | |
233 | } | |
234 | ||
235 | static void gen8_get_stolen_reserved(struct drm_i915_private *dev_priv, | |
236 | unsigned long *base, unsigned long *size) | |
237 | { | |
238 | uint32_t reg_val = I915_READ(GEN6_STOLEN_RESERVED); | |
239 | ||
240 | *base = reg_val & GEN6_STOLEN_RESERVED_ADDR_MASK; | |
241 | ||
242 | switch (reg_val & GEN8_STOLEN_RESERVED_SIZE_MASK) { | |
243 | case GEN8_STOLEN_RESERVED_1M: | |
244 | *size = 1024 * 1024; | |
245 | break; | |
246 | case GEN8_STOLEN_RESERVED_2M: | |
247 | *size = 2 * 1024 * 1024; | |
248 | break; | |
249 | case GEN8_STOLEN_RESERVED_4M: | |
250 | *size = 4 * 1024 * 1024; | |
251 | break; | |
252 | case GEN8_STOLEN_RESERVED_8M: | |
253 | *size = 8 * 1024 * 1024; | |
254 | break; | |
255 | default: | |
256 | *size = 8 * 1024 * 1024; | |
257 | MISSING_CASE(reg_val & GEN8_STOLEN_RESERVED_SIZE_MASK); | |
258 | } | |
259 | } | |
260 | ||
261 | static void bdw_get_stolen_reserved(struct drm_i915_private *dev_priv, | |
262 | unsigned long *base, unsigned long *size) | |
263 | { | |
264 | uint32_t reg_val = I915_READ(GEN6_STOLEN_RESERVED); | |
265 | unsigned long stolen_top; | |
266 | ||
267 | stolen_top = dev_priv->mm.stolen_base + dev_priv->gtt.stolen_size; | |
268 | ||
269 | *base = reg_val & GEN6_STOLEN_RESERVED_ADDR_MASK; | |
270 | ||
271 | /* On these platforms, the register doesn't have a size field, so the | |
272 | * size is the distance between the base and the top of the stolen | |
273 | * memory. We also have the genuine case where base is zero and there's | |
274 | * nothing reserved. */ | |
275 | if (*base == 0) | |
276 | *size = 0; | |
277 | else | |
278 | *size = stolen_top - *base; | |
279 | } | |
280 | ||
9797fbfb CW |
281 | int i915_gem_init_stolen(struct drm_device *dev) |
282 | { | |
283 | struct drm_i915_private *dev_priv = dev->dev_private; | |
d7884d69 | 284 | unsigned long reserved_total, reserved_base = 0, reserved_size; |
3774eb50 | 285 | unsigned long stolen_top; |
9797fbfb | 286 | |
92e97d2f PZ |
287 | mutex_init(&dev_priv->mm.stolen_lock); |
288 | ||
0f4706d2 | 289 | #ifdef CONFIG_INTEL_IOMMU |
fcc9fe1a | 290 | if (intel_iommu_gfx_mapped && INTEL_INFO(dev)->gen < 8) { |
0f4706d2 CW |
291 | DRM_INFO("DMAR active, disabling use of stolen memory\n"); |
292 | return 0; | |
293 | } | |
294 | #endif | |
295 | ||
6644a4e9 CW |
296 | if (dev_priv->gtt.stolen_size == 0) |
297 | return 0; | |
298 | ||
e12a2d53 CW |
299 | dev_priv->mm.stolen_base = i915_stolen_to_physical(dev); |
300 | if (dev_priv->mm.stolen_base == 0) | |
301 | return 0; | |
302 | ||
3774eb50 PZ |
303 | stolen_top = dev_priv->mm.stolen_base + dev_priv->gtt.stolen_size; |
304 | ||
305 | switch (INTEL_INFO(dev_priv)->gen) { | |
306 | case 2: | |
307 | case 3: | |
308 | case 4: | |
d7884d69 VS |
309 | if (!IS_G4X(dev)) |
310 | break; | |
311 | /* fall through */ | |
3774eb50 PZ |
312 | case 5: |
313 | /* Assume the gen6 maximum for the older platforms. */ | |
314 | reserved_size = 1024 * 1024; | |
315 | reserved_base = stolen_top - reserved_size; | |
316 | break; | |
317 | case 6: | |
318 | gen6_get_stolen_reserved(dev_priv, &reserved_base, | |
319 | &reserved_size); | |
320 | break; | |
321 | case 7: | |
322 | gen7_get_stolen_reserved(dev_priv, &reserved_base, | |
323 | &reserved_size); | |
324 | break; | |
325 | default: | |
326 | if (IS_BROADWELL(dev_priv) || IS_SKYLAKE(dev_priv)) | |
327 | bdw_get_stolen_reserved(dev_priv, &reserved_base, | |
328 | &reserved_size); | |
329 | else | |
330 | gen8_get_stolen_reserved(dev_priv, &reserved_base, | |
331 | &reserved_size); | |
332 | break; | |
333 | } | |
334 | ||
335 | /* It is possible for the reserved base to be zero, but the register | |
336 | * field for size doesn't have a zero option. */ | |
337 | if (reserved_base == 0) { | |
338 | reserved_size = 0; | |
339 | reserved_base = stolen_top; | |
40bae736 | 340 | } |
c9cddffc | 341 | |
3774eb50 PZ |
342 | if (reserved_base < dev_priv->mm.stolen_base || |
343 | reserved_base + reserved_size > stolen_top) { | |
344 | DRM_DEBUG_KMS("Stolen reserved area [0x%08lx - 0x%08lx] outside stolen memory [0x%08lx - 0x%08lx]\n", | |
345 | reserved_base, reserved_base + reserved_size, | |
346 | dev_priv->mm.stolen_base, stolen_top); | |
897f9ed0 | 347 | return 0; |
3774eb50 PZ |
348 | } |
349 | ||
350 | /* It is possible for the reserved area to end before the end of stolen | |
351 | * memory, so just consider the start. */ | |
352 | reserved_total = stolen_top - reserved_base; | |
353 | ||
8e9d597a | 354 | DRM_DEBUG_KMS("Memory reserved for graphics device: %zuK, usable: %luK\n", |
3774eb50 PZ |
355 | dev_priv->gtt.stolen_size >> 10, |
356 | (dev_priv->gtt.stolen_size - reserved_total) >> 10); | |
897f9ed0 | 357 | |
9797fbfb | 358 | /* Basic memrange allocator for stolen space */ |
c9cddffc | 359 | drm_mm_init(&dev_priv->mm.stolen, 0, dev_priv->gtt.stolen_size - |
3774eb50 | 360 | reserved_total); |
9797fbfb CW |
361 | |
362 | return 0; | |
363 | } | |
0104fdbb CW |
364 | |
365 | static struct sg_table * | |
366 | i915_pages_create_for_stolen(struct drm_device *dev, | |
367 | u32 offset, u32 size) | |
368 | { | |
369 | struct drm_i915_private *dev_priv = dev->dev_private; | |
370 | struct sg_table *st; | |
371 | struct scatterlist *sg; | |
372 | ||
373 | DRM_DEBUG_DRIVER("offset=0x%x, size=%d\n", offset, size); | |
a54c0c27 | 374 | BUG_ON(offset > dev_priv->gtt.stolen_size - size); |
0104fdbb CW |
375 | |
376 | /* We hide that we have no struct page backing our stolen object | |
377 | * by wrapping the contiguous physical allocation with a fake | |
378 | * dma mapping in a single scatterlist. | |
379 | */ | |
380 | ||
381 | st = kmalloc(sizeof(*st), GFP_KERNEL); | |
382 | if (st == NULL) | |
383 | return NULL; | |
384 | ||
385 | if (sg_alloc_table(st, 1, GFP_KERNEL)) { | |
386 | kfree(st); | |
387 | return NULL; | |
388 | } | |
389 | ||
390 | sg = st->sgl; | |
ec14ba47 | 391 | sg->offset = 0; |
ed23abdd | 392 | sg->length = size; |
0104fdbb CW |
393 | |
394 | sg_dma_address(sg) = (dma_addr_t)dev_priv->mm.stolen_base + offset; | |
395 | sg_dma_len(sg) = size; | |
396 | ||
397 | return st; | |
398 | } | |
399 | ||
400 | static int i915_gem_object_get_pages_stolen(struct drm_i915_gem_object *obj) | |
401 | { | |
402 | BUG(); | |
403 | return -EINVAL; | |
404 | } | |
405 | ||
406 | static void i915_gem_object_put_pages_stolen(struct drm_i915_gem_object *obj) | |
407 | { | |
408 | /* Should only be called during free */ | |
409 | sg_free_table(obj->pages); | |
410 | kfree(obj->pages); | |
411 | } | |
412 | ||
ef0cf27c CW |
413 | |
414 | static void | |
415 | i915_gem_object_release_stolen(struct drm_i915_gem_object *obj) | |
416 | { | |
d713fd49 PZ |
417 | struct drm_i915_private *dev_priv = obj->base.dev->dev_private; |
418 | ||
ef0cf27c | 419 | if (obj->stolen) { |
d713fd49 | 420 | i915_gem_stolen_remove_node(dev_priv, obj->stolen); |
ef0cf27c CW |
421 | kfree(obj->stolen); |
422 | obj->stolen = NULL; | |
423 | } | |
424 | } | |
0104fdbb CW |
425 | static const struct drm_i915_gem_object_ops i915_gem_object_stolen_ops = { |
426 | .get_pages = i915_gem_object_get_pages_stolen, | |
427 | .put_pages = i915_gem_object_put_pages_stolen, | |
ef0cf27c | 428 | .release = i915_gem_object_release_stolen, |
0104fdbb CW |
429 | }; |
430 | ||
431 | static struct drm_i915_gem_object * | |
432 | _i915_gem_object_create_stolen(struct drm_device *dev, | |
433 | struct drm_mm_node *stolen) | |
434 | { | |
435 | struct drm_i915_gem_object *obj; | |
436 | ||
42dcedd4 | 437 | obj = i915_gem_object_alloc(dev); |
0104fdbb CW |
438 | if (obj == NULL) |
439 | return NULL; | |
440 | ||
89c8233f | 441 | drm_gem_private_object_init(dev, &obj->base, stolen->size); |
0104fdbb CW |
442 | i915_gem_object_init(obj, &i915_gem_object_stolen_ops); |
443 | ||
444 | obj->pages = i915_pages_create_for_stolen(dev, | |
445 | stolen->start, stolen->size); | |
446 | if (obj->pages == NULL) | |
447 | goto cleanup; | |
448 | ||
dd53e1b0 | 449 | i915_gem_object_pin_pages(obj); |
0104fdbb CW |
450 | obj->stolen = stolen; |
451 | ||
d46f1c3f CW |
452 | obj->base.read_domains = I915_GEM_DOMAIN_CPU | I915_GEM_DOMAIN_GTT; |
453 | obj->cache_level = HAS_LLC(dev) ? I915_CACHE_LLC : I915_CACHE_NONE; | |
0104fdbb CW |
454 | |
455 | return obj; | |
456 | ||
457 | cleanup: | |
42dcedd4 | 458 | i915_gem_object_free(obj); |
0104fdbb CW |
459 | return NULL; |
460 | } | |
461 | ||
462 | struct drm_i915_gem_object * | |
463 | i915_gem_object_create_stolen(struct drm_device *dev, u32 size) | |
464 | { | |
465 | struct drm_i915_private *dev_priv = dev->dev_private; | |
466 | struct drm_i915_gem_object *obj; | |
467 | struct drm_mm_node *stolen; | |
06e78edf | 468 | int ret; |
0104fdbb | 469 | |
446f8d81 | 470 | if (!drm_mm_initialized(&dev_priv->mm.stolen)) |
0104fdbb CW |
471 | return NULL; |
472 | ||
473 | DRM_DEBUG_KMS("creating stolen object: size=%x\n", size); | |
474 | if (size == 0) | |
475 | return NULL; | |
476 | ||
06e78edf DH |
477 | stolen = kzalloc(sizeof(*stolen), GFP_KERNEL); |
478 | if (!stolen) | |
0104fdbb CW |
479 | return NULL; |
480 | ||
d713fd49 | 481 | ret = i915_gem_stolen_insert_node(dev_priv, stolen, size, 4096); |
06e78edf DH |
482 | if (ret) { |
483 | kfree(stolen); | |
484 | return NULL; | |
485 | } | |
486 | ||
0104fdbb CW |
487 | obj = _i915_gem_object_create_stolen(dev, stolen); |
488 | if (obj) | |
489 | return obj; | |
490 | ||
d713fd49 | 491 | i915_gem_stolen_remove_node(dev_priv, stolen); |
06e78edf | 492 | kfree(stolen); |
0104fdbb CW |
493 | return NULL; |
494 | } | |
495 | ||
866d12b4 CW |
496 | struct drm_i915_gem_object * |
497 | i915_gem_object_create_stolen_for_preallocated(struct drm_device *dev, | |
498 | u32 stolen_offset, | |
499 | u32 gtt_offset, | |
500 | u32 size) | |
501 | { | |
502 | struct drm_i915_private *dev_priv = dev->dev_private; | |
40d74980 | 503 | struct i915_address_space *ggtt = &dev_priv->gtt.base; |
866d12b4 CW |
504 | struct drm_i915_gem_object *obj; |
505 | struct drm_mm_node *stolen; | |
2f633156 | 506 | struct i915_vma *vma; |
b3a070cc | 507 | int ret; |
866d12b4 | 508 | |
446f8d81 | 509 | if (!drm_mm_initialized(&dev_priv->mm.stolen)) |
866d12b4 CW |
510 | return NULL; |
511 | ||
512 | DRM_DEBUG_KMS("creating preallocated stolen object: stolen_offset=%x, gtt_offset=%x, size=%x\n", | |
513 | stolen_offset, gtt_offset, size); | |
514 | ||
515 | /* KISS and expect everything to be page-aligned */ | |
f37b5c2b DV |
516 | if (WARN_ON(size == 0) || WARN_ON(size & 4095) || |
517 | WARN_ON(stolen_offset & 4095)) | |
866d12b4 CW |
518 | return NULL; |
519 | ||
b3a070cc BW |
520 | stolen = kzalloc(sizeof(*stolen), GFP_KERNEL); |
521 | if (!stolen) | |
522 | return NULL; | |
523 | ||
338710e7 BW |
524 | stolen->start = stolen_offset; |
525 | stolen->size = size; | |
92e97d2f | 526 | mutex_lock(&dev_priv->mm.stolen_lock); |
338710e7 | 527 | ret = drm_mm_reserve_node(&dev_priv->mm.stolen, stolen); |
92e97d2f | 528 | mutex_unlock(&dev_priv->mm.stolen_lock); |
b3a070cc | 529 | if (ret) { |
866d12b4 | 530 | DRM_DEBUG_KMS("failed to allocate stolen space\n"); |
b3a070cc | 531 | kfree(stolen); |
866d12b4 CW |
532 | return NULL; |
533 | } | |
534 | ||
535 | obj = _i915_gem_object_create_stolen(dev, stolen); | |
536 | if (obj == NULL) { | |
537 | DRM_DEBUG_KMS("failed to allocate stolen object\n"); | |
d713fd49 | 538 | i915_gem_stolen_remove_node(dev_priv, stolen); |
06e78edf | 539 | kfree(stolen); |
866d12b4 CW |
540 | return NULL; |
541 | } | |
542 | ||
3727d55e | 543 | /* Some objects just need physical mem from stolen space */ |
190d6cd5 | 544 | if (gtt_offset == I915_GTT_OFFSET_NONE) |
3727d55e JB |
545 | return obj; |
546 | ||
e656a6cb | 547 | vma = i915_gem_obj_lookup_or_create_vma(obj, ggtt); |
db473b36 DC |
548 | if (IS_ERR(vma)) { |
549 | ret = PTR_ERR(vma); | |
2f633156 BW |
550 | goto err_out; |
551 | } | |
552 | ||
866d12b4 CW |
553 | /* To simplify the initialisation sequence between KMS and GTT, |
554 | * we allow construction of the stolen object prior to | |
555 | * setting up the GTT space. The actual reservation will occur | |
556 | * later. | |
557 | */ | |
2f633156 BW |
558 | vma->node.start = gtt_offset; |
559 | vma->node.size = size; | |
40d74980 BW |
560 | if (drm_mm_initialized(&ggtt->mm)) { |
561 | ret = drm_mm_reserve_node(&ggtt->mm, &vma->node); | |
b3a070cc | 562 | if (ret) { |
866d12b4 | 563 | DRM_DEBUG_KMS("failed to allocate stolen GTT space\n"); |
4a025e26 | 564 | goto err_vma; |
866d12b4 | 565 | } |
edd41a87 | 566 | } |
866d12b4 | 567 | |
aff43766 | 568 | vma->bound |= GLOBAL_BIND; |
866d12b4 | 569 | |
35c20a60 | 570 | list_add_tail(&obj->global_list, &dev_priv->mm.bound_list); |
ca191b13 | 571 | list_add_tail(&vma->mm_list, &ggtt->inactive_list); |
d8ccba86 | 572 | i915_gem_object_pin_pages(obj); |
866d12b4 CW |
573 | |
574 | return obj; | |
b3a070cc | 575 | |
4a025e26 DV |
576 | err_vma: |
577 | i915_gem_vma_destroy(vma); | |
f7f18184 | 578 | err_out: |
d713fd49 | 579 | i915_gem_stolen_remove_node(dev_priv, stolen); |
32c913e4 | 580 | kfree(stolen); |
b3a070cc BW |
581 | drm_gem_object_unreference(&obj->base); |
582 | return NULL; | |
866d12b4 | 583 | } |