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 | ||
a9da512b PZ |
45 | int i915_gem_stolen_insert_node_in_range(struct drm_i915_private *dev_priv, |
46 | struct drm_mm_node *node, u64 size, | |
47 | unsigned alignment, u64 start, u64 end) | |
d713fd49 | 48 | { |
92e97d2f PZ |
49 | int ret; |
50 | ||
d713fd49 PZ |
51 | if (!drm_mm_initialized(&dev_priv->mm.stolen)) |
52 | return -ENODEV; | |
53 | ||
1ca36d4c PZ |
54 | /* See the comment at the drm_mm_init() call for more about this check. |
55 | * WaSkipStolenMemoryFirstPage:bdw,chv (incomplete) */ | |
56 | if (INTEL_INFO(dev_priv)->gen == 8 && start < 4096) | |
57 | start = 4096; | |
58 | ||
92e97d2f | 59 | mutex_lock(&dev_priv->mm.stolen_lock); |
a9da512b PZ |
60 | ret = drm_mm_insert_node_in_range(&dev_priv->mm.stolen, node, size, |
61 | alignment, start, end, | |
62 | DRM_MM_SEARCH_DEFAULT); | |
92e97d2f PZ |
63 | mutex_unlock(&dev_priv->mm.stolen_lock); |
64 | ||
65 | return ret; | |
d713fd49 PZ |
66 | } |
67 | ||
a9da512b PZ |
68 | int i915_gem_stolen_insert_node(struct drm_i915_private *dev_priv, |
69 | struct drm_mm_node *node, u64 size, | |
70 | unsigned alignment) | |
71 | { | |
72 | return i915_gem_stolen_insert_node_in_range(dev_priv, node, size, | |
73 | alignment, 0, | |
74 | dev_priv->gtt.stolen_usable_size); | |
75 | } | |
76 | ||
d713fd49 PZ |
77 | void i915_gem_stolen_remove_node(struct drm_i915_private *dev_priv, |
78 | struct drm_mm_node *node) | |
79 | { | |
92e97d2f | 80 | mutex_lock(&dev_priv->mm.stolen_lock); |
d713fd49 | 81 | drm_mm_remove_node(node); |
92e97d2f | 82 | mutex_unlock(&dev_priv->mm.stolen_lock); |
d713fd49 PZ |
83 | } |
84 | ||
e12a2d53 | 85 | static unsigned long i915_stolen_to_physical(struct drm_device *dev) |
9797fbfb CW |
86 | { |
87 | struct drm_i915_private *dev_priv = dev->dev_private; | |
eaba1b8f | 88 | struct resource *r; |
9797fbfb CW |
89 | u32 base; |
90 | ||
17fec8a0 CW |
91 | /* Almost universally we can find the Graphics Base of Stolen Memory |
92 | * at offset 0x5c in the igfx configuration space. On a few (desktop) | |
93 | * machines this is also mirrored in the bridge device at different | |
94 | * locations, or in the MCHBAR. On gen2, the layout is again slightly | |
95 | * different with the Graphics Segment immediately following Top of | |
96 | * Memory (or Top of Usable DRAM). Note it appears that TOUD is only | |
97 | * reported by 865g, so we just use the top of memory as determined | |
98 | * by the e820 probe. | |
e12a2d53 | 99 | * |
17fec8a0 | 100 | * XXX However gen2 requires an unavailable symbol. |
9797fbfb | 101 | */ |
e12a2d53 | 102 | base = 0; |
17fec8a0 CW |
103 | if (INTEL_INFO(dev)->gen >= 3) { |
104 | /* Read Graphics Base of Stolen Memory directly */ | |
c9cddffc JB |
105 | pci_read_config_dword(dev->pdev, 0x5c, &base); |
106 | base &= ~((1<<20) - 1); | |
17fec8a0 | 107 | } else { /* GEN2 */ |
e12a2d53 | 108 | #if 0 |
e12a2d53 CW |
109 | /* Stolen is immediately above Top of Memory */ |
110 | base = max_low_pfn_mapped << PAGE_SHIFT; | |
9797fbfb | 111 | #endif |
e12a2d53 | 112 | } |
9797fbfb | 113 | |
eaba1b8f CW |
114 | if (base == 0) |
115 | return 0; | |
116 | ||
f1e1c212 VS |
117 | /* make sure we don't clobber the GTT if it's within stolen memory */ |
118 | if (INTEL_INFO(dev)->gen <= 4 && !IS_G33(dev) && !IS_G4X(dev)) { | |
119 | struct { | |
120 | u32 start, end; | |
121 | } stolen[2] = { | |
122 | { .start = base, .end = base + dev_priv->gtt.stolen_size, }, | |
123 | { .start = base, .end = base + dev_priv->gtt.stolen_size, }, | |
124 | }; | |
125 | u64 gtt_start, gtt_end; | |
126 | ||
127 | gtt_start = I915_READ(PGTBL_CTL); | |
128 | if (IS_GEN4(dev)) | |
129 | gtt_start = (gtt_start & PGTBL_ADDRESS_LO_MASK) | | |
130 | (gtt_start & PGTBL_ADDRESS_HI_MASK) << 28; | |
131 | else | |
132 | gtt_start &= PGTBL_ADDRESS_LO_MASK; | |
133 | gtt_end = gtt_start + gtt_total_entries(dev_priv->gtt) * 4; | |
134 | ||
135 | if (gtt_start >= stolen[0].start && gtt_start < stolen[0].end) | |
136 | stolen[0].end = gtt_start; | |
137 | if (gtt_end > stolen[1].start && gtt_end <= stolen[1].end) | |
138 | stolen[1].start = gtt_end; | |
139 | ||
140 | /* pick the larger of the two chunks */ | |
141 | if (stolen[0].end - stolen[0].start > | |
142 | stolen[1].end - stolen[1].start) { | |
143 | base = stolen[0].start; | |
144 | dev_priv->gtt.stolen_size = stolen[0].end - stolen[0].start; | |
145 | } else { | |
146 | base = stolen[1].start; | |
147 | dev_priv->gtt.stolen_size = stolen[1].end - stolen[1].start; | |
148 | } | |
149 | ||
150 | if (stolen[0].start != stolen[1].start || | |
151 | stolen[0].end != stolen[1].end) { | |
152 | DRM_DEBUG_KMS("GTT within stolen memory at 0x%llx-0x%llx\n", | |
153 | (unsigned long long) gtt_start, | |
154 | (unsigned long long) gtt_end - 1); | |
155 | DRM_DEBUG_KMS("Stolen memory adjusted to 0x%x-0x%x\n", | |
156 | base, base + (u32) dev_priv->gtt.stolen_size - 1); | |
157 | } | |
158 | } | |
159 | ||
160 | ||
eaba1b8f CW |
161 | /* Verify that nothing else uses this physical address. Stolen |
162 | * memory should be reserved by the BIOS and hidden from the | |
163 | * kernel. So if the region is already marked as busy, something | |
164 | * is seriously wrong. | |
165 | */ | |
166 | r = devm_request_mem_region(dev->dev, base, dev_priv->gtt.stolen_size, | |
167 | "Graphics Stolen Memory"); | |
168 | if (r == NULL) { | |
3617dc96 AG |
169 | /* |
170 | * One more attempt but this time requesting region from | |
171 | * base + 1, as we have seen that this resolves the region | |
172 | * conflict with the PCI Bus. | |
173 | * This is a BIOS w/a: Some BIOS wrap stolen in the root | |
174 | * PCI bus, but have an off-by-one error. Hence retry the | |
175 | * reservation starting from 1 instead of 0. | |
176 | */ | |
177 | r = devm_request_mem_region(dev->dev, base + 1, | |
178 | dev_priv->gtt.stolen_size - 1, | |
179 | "Graphics Stolen Memory"); | |
0b6d24c0 DV |
180 | /* |
181 | * GEN3 firmware likes to smash pci bridges into the stolen | |
182 | * range. Apparently this works. | |
183 | */ | |
184 | if (r == NULL && !IS_GEN3(dev)) { | |
3617dc96 AG |
185 | DRM_ERROR("conflict detected with stolen region: [0x%08x - 0x%08x]\n", |
186 | base, base + (uint32_t)dev_priv->gtt.stolen_size); | |
187 | base = 0; | |
188 | } | |
eaba1b8f CW |
189 | } |
190 | ||
e12a2d53 | 191 | return base; |
9797fbfb CW |
192 | } |
193 | ||
9797fbfb CW |
194 | void i915_gem_cleanup_stolen(struct drm_device *dev) |
195 | { | |
4d7bb011 DV |
196 | struct drm_i915_private *dev_priv = dev->dev_private; |
197 | ||
446f8d81 DV |
198 | if (!drm_mm_initialized(&dev_priv->mm.stolen)) |
199 | return; | |
200 | ||
4d7bb011 | 201 | drm_mm_takedown(&dev_priv->mm.stolen); |
9797fbfb CW |
202 | } |
203 | ||
7d316aec VS |
204 | static void g4x_get_stolen_reserved(struct drm_i915_private *dev_priv, |
205 | unsigned long *base, unsigned long *size) | |
206 | { | |
207 | uint32_t reg_val = I915_READ(IS_GM45(dev_priv) ? | |
208 | CTG_STOLEN_RESERVED : | |
209 | ELK_STOLEN_RESERVED); | |
210 | unsigned long stolen_top = dev_priv->mm.stolen_base + | |
211 | dev_priv->gtt.stolen_size; | |
212 | ||
213 | *base = (reg_val & G4X_STOLEN_RESERVED_ADDR2_MASK) << 16; | |
214 | ||
215 | WARN_ON((reg_val & G4X_STOLEN_RESERVED_ADDR1_MASK) < *base); | |
216 | ||
217 | /* On these platforms, the register doesn't have a size field, so the | |
218 | * size is the distance between the base and the top of the stolen | |
219 | * memory. We also have the genuine case where base is zero and there's | |
220 | * nothing reserved. */ | |
221 | if (*base == 0) | |
222 | *size = 0; | |
223 | else | |
224 | *size = stolen_top - *base; | |
225 | } | |
226 | ||
3774eb50 PZ |
227 | static void gen6_get_stolen_reserved(struct drm_i915_private *dev_priv, |
228 | unsigned long *base, unsigned long *size) | |
229 | { | |
230 | uint32_t reg_val = I915_READ(GEN6_STOLEN_RESERVED); | |
231 | ||
232 | *base = reg_val & GEN6_STOLEN_RESERVED_ADDR_MASK; | |
233 | ||
234 | switch (reg_val & GEN6_STOLEN_RESERVED_SIZE_MASK) { | |
235 | case GEN6_STOLEN_RESERVED_1M: | |
236 | *size = 1024 * 1024; | |
237 | break; | |
238 | case GEN6_STOLEN_RESERVED_512K: | |
239 | *size = 512 * 1024; | |
240 | break; | |
241 | case GEN6_STOLEN_RESERVED_256K: | |
242 | *size = 256 * 1024; | |
243 | break; | |
244 | case GEN6_STOLEN_RESERVED_128K: | |
245 | *size = 128 * 1024; | |
246 | break; | |
247 | default: | |
248 | *size = 1024 * 1024; | |
249 | MISSING_CASE(reg_val & GEN6_STOLEN_RESERVED_SIZE_MASK); | |
250 | } | |
251 | } | |
252 | ||
253 | static void gen7_get_stolen_reserved(struct drm_i915_private *dev_priv, | |
254 | unsigned long *base, unsigned long *size) | |
255 | { | |
256 | uint32_t reg_val = I915_READ(GEN6_STOLEN_RESERVED); | |
257 | ||
258 | *base = reg_val & GEN7_STOLEN_RESERVED_ADDR_MASK; | |
259 | ||
260 | switch (reg_val & GEN7_STOLEN_RESERVED_SIZE_MASK) { | |
261 | case GEN7_STOLEN_RESERVED_1M: | |
262 | *size = 1024 * 1024; | |
263 | break; | |
264 | case GEN7_STOLEN_RESERVED_256K: | |
265 | *size = 256 * 1024; | |
266 | break; | |
267 | default: | |
268 | *size = 1024 * 1024; | |
269 | MISSING_CASE(reg_val & GEN7_STOLEN_RESERVED_SIZE_MASK); | |
270 | } | |
271 | } | |
272 | ||
273 | static void gen8_get_stolen_reserved(struct drm_i915_private *dev_priv, | |
274 | unsigned long *base, unsigned long *size) | |
275 | { | |
276 | uint32_t reg_val = I915_READ(GEN6_STOLEN_RESERVED); | |
277 | ||
278 | *base = reg_val & GEN6_STOLEN_RESERVED_ADDR_MASK; | |
279 | ||
280 | switch (reg_val & GEN8_STOLEN_RESERVED_SIZE_MASK) { | |
281 | case GEN8_STOLEN_RESERVED_1M: | |
282 | *size = 1024 * 1024; | |
283 | break; | |
284 | case GEN8_STOLEN_RESERVED_2M: | |
285 | *size = 2 * 1024 * 1024; | |
286 | break; | |
287 | case GEN8_STOLEN_RESERVED_4M: | |
288 | *size = 4 * 1024 * 1024; | |
289 | break; | |
290 | case GEN8_STOLEN_RESERVED_8M: | |
291 | *size = 8 * 1024 * 1024; | |
292 | break; | |
293 | default: | |
294 | *size = 8 * 1024 * 1024; | |
295 | MISSING_CASE(reg_val & GEN8_STOLEN_RESERVED_SIZE_MASK); | |
296 | } | |
297 | } | |
298 | ||
299 | static void bdw_get_stolen_reserved(struct drm_i915_private *dev_priv, | |
300 | unsigned long *base, unsigned long *size) | |
301 | { | |
302 | uint32_t reg_val = I915_READ(GEN6_STOLEN_RESERVED); | |
303 | unsigned long stolen_top; | |
304 | ||
305 | stolen_top = dev_priv->mm.stolen_base + dev_priv->gtt.stolen_size; | |
306 | ||
307 | *base = reg_val & GEN6_STOLEN_RESERVED_ADDR_MASK; | |
308 | ||
309 | /* On these platforms, the register doesn't have a size field, so the | |
310 | * size is the distance between the base and the top of the stolen | |
311 | * memory. We also have the genuine case where base is zero and there's | |
312 | * nothing reserved. */ | |
313 | if (*base == 0) | |
314 | *size = 0; | |
315 | else | |
316 | *size = stolen_top - *base; | |
317 | } | |
318 | ||
9797fbfb CW |
319 | int i915_gem_init_stolen(struct drm_device *dev) |
320 | { | |
321 | struct drm_i915_private *dev_priv = dev->dev_private; | |
d7884d69 | 322 | unsigned long reserved_total, reserved_base = 0, reserved_size; |
3774eb50 | 323 | unsigned long stolen_top; |
9797fbfb | 324 | |
92e97d2f PZ |
325 | mutex_init(&dev_priv->mm.stolen_lock); |
326 | ||
0f4706d2 | 327 | #ifdef CONFIG_INTEL_IOMMU |
fcc9fe1a | 328 | if (intel_iommu_gfx_mapped && INTEL_INFO(dev)->gen < 8) { |
0f4706d2 CW |
329 | DRM_INFO("DMAR active, disabling use of stolen memory\n"); |
330 | return 0; | |
331 | } | |
332 | #endif | |
333 | ||
6644a4e9 CW |
334 | if (dev_priv->gtt.stolen_size == 0) |
335 | return 0; | |
336 | ||
e12a2d53 CW |
337 | dev_priv->mm.stolen_base = i915_stolen_to_physical(dev); |
338 | if (dev_priv->mm.stolen_base == 0) | |
339 | return 0; | |
340 | ||
3774eb50 PZ |
341 | stolen_top = dev_priv->mm.stolen_base + dev_priv->gtt.stolen_size; |
342 | ||
343 | switch (INTEL_INFO(dev_priv)->gen) { | |
344 | case 2: | |
345 | case 3: | |
7d316aec | 346 | break; |
3774eb50 | 347 | case 4: |
7d316aec VS |
348 | if (IS_G4X(dev)) |
349 | g4x_get_stolen_reserved(dev_priv, &reserved_base, | |
350 | &reserved_size); | |
351 | break; | |
3774eb50 PZ |
352 | case 5: |
353 | /* Assume the gen6 maximum for the older platforms. */ | |
354 | reserved_size = 1024 * 1024; | |
355 | reserved_base = stolen_top - reserved_size; | |
356 | break; | |
357 | case 6: | |
358 | gen6_get_stolen_reserved(dev_priv, &reserved_base, | |
359 | &reserved_size); | |
360 | break; | |
361 | case 7: | |
362 | gen7_get_stolen_reserved(dev_priv, &reserved_base, | |
363 | &reserved_size); | |
364 | break; | |
365 | default: | |
366 | if (IS_BROADWELL(dev_priv) || IS_SKYLAKE(dev_priv)) | |
367 | bdw_get_stolen_reserved(dev_priv, &reserved_base, | |
368 | &reserved_size); | |
369 | else | |
370 | gen8_get_stolen_reserved(dev_priv, &reserved_base, | |
371 | &reserved_size); | |
372 | break; | |
373 | } | |
374 | ||
375 | /* It is possible for the reserved base to be zero, but the register | |
376 | * field for size doesn't have a zero option. */ | |
377 | if (reserved_base == 0) { | |
378 | reserved_size = 0; | |
379 | reserved_base = stolen_top; | |
40bae736 | 380 | } |
c9cddffc | 381 | |
3774eb50 PZ |
382 | if (reserved_base < dev_priv->mm.stolen_base || |
383 | reserved_base + reserved_size > stolen_top) { | |
384 | DRM_DEBUG_KMS("Stolen reserved area [0x%08lx - 0x%08lx] outside stolen memory [0x%08lx - 0x%08lx]\n", | |
385 | reserved_base, reserved_base + reserved_size, | |
386 | dev_priv->mm.stolen_base, stolen_top); | |
897f9ed0 | 387 | return 0; |
3774eb50 PZ |
388 | } |
389 | ||
390 | /* It is possible for the reserved area to end before the end of stolen | |
391 | * memory, so just consider the start. */ | |
392 | reserved_total = stolen_top - reserved_base; | |
393 | ||
8e9d597a | 394 | DRM_DEBUG_KMS("Memory reserved for graphics device: %zuK, usable: %luK\n", |
3774eb50 PZ |
395 | dev_priv->gtt.stolen_size >> 10, |
396 | (dev_priv->gtt.stolen_size - reserved_total) >> 10); | |
897f9ed0 | 397 | |
a9da512b PZ |
398 | dev_priv->gtt.stolen_usable_size = dev_priv->gtt.stolen_size - |
399 | reserved_total; | |
400 | ||
1ca36d4c PZ |
401 | /* |
402 | * Basic memrange allocator for stolen space. | |
403 | * | |
404 | * TODO: Notice that some platforms require us to not use the first page | |
405 | * of the stolen memory but their BIOSes may still put the framebuffer | |
406 | * on the first page. So we don't reserve this page for now because of | |
407 | * that. Our current solution is to just prevent new nodes from being | |
408 | * inserted on the first page - see the check we have at | |
409 | * i915_gem_stolen_insert_node_in_range(). We may want to fix the fbcon | |
410 | * problem later. | |
411 | */ | |
a9da512b | 412 | drm_mm_init(&dev_priv->mm.stolen, 0, dev_priv->gtt.stolen_usable_size); |
9797fbfb CW |
413 | |
414 | return 0; | |
415 | } | |
0104fdbb CW |
416 | |
417 | static struct sg_table * | |
418 | i915_pages_create_for_stolen(struct drm_device *dev, | |
419 | u32 offset, u32 size) | |
420 | { | |
421 | struct drm_i915_private *dev_priv = dev->dev_private; | |
422 | struct sg_table *st; | |
423 | struct scatterlist *sg; | |
424 | ||
425 | DRM_DEBUG_DRIVER("offset=0x%x, size=%d\n", offset, size); | |
a54c0c27 | 426 | BUG_ON(offset > dev_priv->gtt.stolen_size - size); |
0104fdbb CW |
427 | |
428 | /* We hide that we have no struct page backing our stolen object | |
429 | * by wrapping the contiguous physical allocation with a fake | |
430 | * dma mapping in a single scatterlist. | |
431 | */ | |
432 | ||
433 | st = kmalloc(sizeof(*st), GFP_KERNEL); | |
434 | if (st == NULL) | |
435 | return NULL; | |
436 | ||
437 | if (sg_alloc_table(st, 1, GFP_KERNEL)) { | |
438 | kfree(st); | |
439 | return NULL; | |
440 | } | |
441 | ||
442 | sg = st->sgl; | |
ec14ba47 | 443 | sg->offset = 0; |
ed23abdd | 444 | sg->length = size; |
0104fdbb CW |
445 | |
446 | sg_dma_address(sg) = (dma_addr_t)dev_priv->mm.stolen_base + offset; | |
447 | sg_dma_len(sg) = size; | |
448 | ||
449 | return st; | |
450 | } | |
451 | ||
452 | static int i915_gem_object_get_pages_stolen(struct drm_i915_gem_object *obj) | |
453 | { | |
454 | BUG(); | |
455 | return -EINVAL; | |
456 | } | |
457 | ||
458 | static void i915_gem_object_put_pages_stolen(struct drm_i915_gem_object *obj) | |
459 | { | |
460 | /* Should only be called during free */ | |
461 | sg_free_table(obj->pages); | |
462 | kfree(obj->pages); | |
463 | } | |
464 | ||
ef0cf27c CW |
465 | |
466 | static void | |
467 | i915_gem_object_release_stolen(struct drm_i915_gem_object *obj) | |
468 | { | |
d713fd49 PZ |
469 | struct drm_i915_private *dev_priv = obj->base.dev->dev_private; |
470 | ||
ef0cf27c | 471 | if (obj->stolen) { |
d713fd49 | 472 | i915_gem_stolen_remove_node(dev_priv, obj->stolen); |
ef0cf27c CW |
473 | kfree(obj->stolen); |
474 | obj->stolen = NULL; | |
475 | } | |
476 | } | |
0104fdbb CW |
477 | static const struct drm_i915_gem_object_ops i915_gem_object_stolen_ops = { |
478 | .get_pages = i915_gem_object_get_pages_stolen, | |
479 | .put_pages = i915_gem_object_put_pages_stolen, | |
ef0cf27c | 480 | .release = i915_gem_object_release_stolen, |
0104fdbb CW |
481 | }; |
482 | ||
483 | static struct drm_i915_gem_object * | |
484 | _i915_gem_object_create_stolen(struct drm_device *dev, | |
485 | struct drm_mm_node *stolen) | |
486 | { | |
487 | struct drm_i915_gem_object *obj; | |
488 | ||
42dcedd4 | 489 | obj = i915_gem_object_alloc(dev); |
0104fdbb CW |
490 | if (obj == NULL) |
491 | return NULL; | |
492 | ||
89c8233f | 493 | drm_gem_private_object_init(dev, &obj->base, stolen->size); |
0104fdbb CW |
494 | i915_gem_object_init(obj, &i915_gem_object_stolen_ops); |
495 | ||
496 | obj->pages = i915_pages_create_for_stolen(dev, | |
497 | stolen->start, stolen->size); | |
498 | if (obj->pages == NULL) | |
499 | goto cleanup; | |
500 | ||
dd53e1b0 | 501 | i915_gem_object_pin_pages(obj); |
0104fdbb CW |
502 | obj->stolen = stolen; |
503 | ||
d46f1c3f CW |
504 | obj->base.read_domains = I915_GEM_DOMAIN_CPU | I915_GEM_DOMAIN_GTT; |
505 | obj->cache_level = HAS_LLC(dev) ? I915_CACHE_LLC : I915_CACHE_NONE; | |
0104fdbb CW |
506 | |
507 | return obj; | |
508 | ||
509 | cleanup: | |
42dcedd4 | 510 | i915_gem_object_free(obj); |
0104fdbb CW |
511 | return NULL; |
512 | } | |
513 | ||
514 | struct drm_i915_gem_object * | |
515 | i915_gem_object_create_stolen(struct drm_device *dev, u32 size) | |
516 | { | |
517 | struct drm_i915_private *dev_priv = dev->dev_private; | |
518 | struct drm_i915_gem_object *obj; | |
519 | struct drm_mm_node *stolen; | |
06e78edf | 520 | int ret; |
0104fdbb | 521 | |
446f8d81 | 522 | if (!drm_mm_initialized(&dev_priv->mm.stolen)) |
0104fdbb CW |
523 | return NULL; |
524 | ||
525 | DRM_DEBUG_KMS("creating stolen object: size=%x\n", size); | |
526 | if (size == 0) | |
527 | return NULL; | |
528 | ||
06e78edf DH |
529 | stolen = kzalloc(sizeof(*stolen), GFP_KERNEL); |
530 | if (!stolen) | |
0104fdbb CW |
531 | return NULL; |
532 | ||
d713fd49 | 533 | ret = i915_gem_stolen_insert_node(dev_priv, stolen, size, 4096); |
06e78edf DH |
534 | if (ret) { |
535 | kfree(stolen); | |
536 | return NULL; | |
537 | } | |
538 | ||
0104fdbb CW |
539 | obj = _i915_gem_object_create_stolen(dev, stolen); |
540 | if (obj) | |
541 | return obj; | |
542 | ||
d713fd49 | 543 | i915_gem_stolen_remove_node(dev_priv, stolen); |
06e78edf | 544 | kfree(stolen); |
0104fdbb CW |
545 | return NULL; |
546 | } | |
547 | ||
866d12b4 CW |
548 | struct drm_i915_gem_object * |
549 | i915_gem_object_create_stolen_for_preallocated(struct drm_device *dev, | |
550 | u32 stolen_offset, | |
551 | u32 gtt_offset, | |
552 | u32 size) | |
553 | { | |
554 | struct drm_i915_private *dev_priv = dev->dev_private; | |
40d74980 | 555 | struct i915_address_space *ggtt = &dev_priv->gtt.base; |
866d12b4 CW |
556 | struct drm_i915_gem_object *obj; |
557 | struct drm_mm_node *stolen; | |
2f633156 | 558 | struct i915_vma *vma; |
b3a070cc | 559 | int ret; |
866d12b4 | 560 | |
446f8d81 | 561 | if (!drm_mm_initialized(&dev_priv->mm.stolen)) |
866d12b4 CW |
562 | return NULL; |
563 | ||
564 | DRM_DEBUG_KMS("creating preallocated stolen object: stolen_offset=%x, gtt_offset=%x, size=%x\n", | |
565 | stolen_offset, gtt_offset, size); | |
566 | ||
567 | /* KISS and expect everything to be page-aligned */ | |
f37b5c2b DV |
568 | if (WARN_ON(size == 0) || WARN_ON(size & 4095) || |
569 | WARN_ON(stolen_offset & 4095)) | |
866d12b4 CW |
570 | return NULL; |
571 | ||
b3a070cc BW |
572 | stolen = kzalloc(sizeof(*stolen), GFP_KERNEL); |
573 | if (!stolen) | |
574 | return NULL; | |
575 | ||
338710e7 BW |
576 | stolen->start = stolen_offset; |
577 | stolen->size = size; | |
92e97d2f | 578 | mutex_lock(&dev_priv->mm.stolen_lock); |
338710e7 | 579 | ret = drm_mm_reserve_node(&dev_priv->mm.stolen, stolen); |
92e97d2f | 580 | mutex_unlock(&dev_priv->mm.stolen_lock); |
b3a070cc | 581 | if (ret) { |
866d12b4 | 582 | DRM_DEBUG_KMS("failed to allocate stolen space\n"); |
b3a070cc | 583 | kfree(stolen); |
866d12b4 CW |
584 | return NULL; |
585 | } | |
586 | ||
587 | obj = _i915_gem_object_create_stolen(dev, stolen); | |
588 | if (obj == NULL) { | |
589 | DRM_DEBUG_KMS("failed to allocate stolen object\n"); | |
d713fd49 | 590 | i915_gem_stolen_remove_node(dev_priv, stolen); |
06e78edf | 591 | kfree(stolen); |
866d12b4 CW |
592 | return NULL; |
593 | } | |
594 | ||
3727d55e | 595 | /* Some objects just need physical mem from stolen space */ |
190d6cd5 | 596 | if (gtt_offset == I915_GTT_OFFSET_NONE) |
3727d55e JB |
597 | return obj; |
598 | ||
e656a6cb | 599 | vma = i915_gem_obj_lookup_or_create_vma(obj, ggtt); |
db473b36 DC |
600 | if (IS_ERR(vma)) { |
601 | ret = PTR_ERR(vma); | |
7c4a7d60 | 602 | goto err; |
2f633156 BW |
603 | } |
604 | ||
866d12b4 CW |
605 | /* To simplify the initialisation sequence between KMS and GTT, |
606 | * we allow construction of the stolen object prior to | |
607 | * setting up the GTT space. The actual reservation will occur | |
608 | * later. | |
609 | */ | |
2f633156 BW |
610 | vma->node.start = gtt_offset; |
611 | vma->node.size = size; | |
40d74980 BW |
612 | if (drm_mm_initialized(&ggtt->mm)) { |
613 | ret = drm_mm_reserve_node(&ggtt->mm, &vma->node); | |
b3a070cc | 614 | if (ret) { |
866d12b4 | 615 | DRM_DEBUG_KMS("failed to allocate stolen GTT space\n"); |
7c4a7d60 | 616 | goto err; |
866d12b4 | 617 | } |
866d12b4 | 618 | |
7c4a7d60 CW |
619 | vma->bound |= GLOBAL_BIND; |
620 | list_add_tail(&vma->mm_list, &ggtt->inactive_list); | |
621 | } | |
866d12b4 | 622 | |
35c20a60 | 623 | list_add_tail(&obj->global_list, &dev_priv->mm.bound_list); |
d8ccba86 | 624 | i915_gem_object_pin_pages(obj); |
866d12b4 CW |
625 | |
626 | return obj; | |
b3a070cc | 627 | |
7c4a7d60 | 628 | err: |
b3a070cc BW |
629 | drm_gem_object_unreference(&obj->base); |
630 | return NULL; | |
866d12b4 | 631 | } |