Line data Source code
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 :
29 : #include <dev/pci/drm/drmP.h>
30 : #include <dev/pci/drm/i915_drm.h>
31 : #include "i915_drv.h"
32 :
33 : #define KB(x) ((x) * 1024)
34 : #define MB(x) (KB(x) * 1024)
35 :
36 : /*
37 : * The BIOS typically reserves some of the system's memory for the exclusive
38 : * use of the integrated graphics. This memory is no longer available for
39 : * use by the OS and so the user finds that his system has less memory
40 : * available than he put in. We refer to this memory as stolen.
41 : *
42 : * The BIOS will allocate its framebuffer from the stolen memory. Our
43 : * goal is try to reuse that object for our own fbcon which must always
44 : * be available for panics. Anything else we can reuse the stolen memory
45 : * for is a boon.
46 : */
47 :
48 0 : int i915_gem_stolen_insert_node_in_range(struct drm_i915_private *dev_priv,
49 : struct drm_mm_node *node, u64 size,
50 : unsigned alignment, u64 start, u64 end)
51 : {
52 : int ret;
53 :
54 0 : if (!drm_mm_initialized(&dev_priv->mm.stolen))
55 0 : return -ENODEV;
56 :
57 : /* See the comment at the drm_mm_init() call for more about this check.
58 : * WaSkipStolenMemoryFirstPage:bdw,chv (incomplete) */
59 0 : if (start < 4096 && (IS_GEN8(dev_priv) ||
60 0 : IS_KBL_REVID(dev_priv, 0, KBL_REVID_A0)))
61 0 : start = 4096;
62 :
63 0 : mutex_lock(&dev_priv->mm.stolen_lock);
64 0 : ret = drm_mm_insert_node_in_range(&dev_priv->mm.stolen, node, size,
65 : alignment, start, end,
66 : DRM_MM_SEARCH_DEFAULT);
67 0 : mutex_unlock(&dev_priv->mm.stolen_lock);
68 :
69 0 : return ret;
70 0 : }
71 :
72 0 : int i915_gem_stolen_insert_node(struct drm_i915_private *dev_priv,
73 : struct drm_mm_node *node, u64 size,
74 : unsigned alignment)
75 : {
76 0 : return i915_gem_stolen_insert_node_in_range(dev_priv, node, size,
77 : alignment, 0,
78 0 : dev_priv->gtt.stolen_usable_size);
79 : }
80 :
81 0 : void i915_gem_stolen_remove_node(struct drm_i915_private *dev_priv,
82 : struct drm_mm_node *node)
83 : {
84 0 : mutex_lock(&dev_priv->mm.stolen_lock);
85 0 : drm_mm_remove_node(node);
86 0 : mutex_unlock(&dev_priv->mm.stolen_lock);
87 0 : }
88 :
89 0 : static unsigned long i915_stolen_to_physical(struct drm_device *dev)
90 : {
91 0 : struct drm_i915_private *dev_priv = dev->dev_private;
92 : #ifdef __linux__
93 : struct resource *r;
94 : #endif
95 0 : u32 base;
96 :
97 : /* Almost universally we can find the Graphics Base of Stolen Memory
98 : * at offset 0x5c in the igfx configuration space. On a few (desktop)
99 : * machines this is also mirrored in the bridge device at different
100 : * locations, or in the MCHBAR.
101 : *
102 : * On 865 we just check the TOUD register.
103 : *
104 : * On 830/845/85x the stolen memory base isn't available in any
105 : * register. We need to calculate it as TOM-TSEG_SIZE-stolen_size.
106 : *
107 : */
108 0 : base = 0;
109 0 : if (INTEL_INFO(dev)->gen >= 3) {
110 : /* Read Graphics Base of Stolen Memory directly */
111 0 : pci_read_config_dword(dev->pdev, 0x5c, &base);
112 0 : base &= ~((1<<20) - 1);
113 0 : } else if (IS_I865G(dev)) {
114 : u32 tseg_size = 0;
115 0 : u16 toud = 0;
116 0 : u8 tmp;
117 :
118 0 : pci_bus_read_config_byte(dev->pdev->bus, PCI_DEVFN(0, 0),
119 : I845_ESMRAMC, &tmp);
120 :
121 0 : if (tmp & TSEG_ENABLE) {
122 0 : switch (tmp & I845_TSEG_SIZE_MASK) {
123 : case I845_TSEG_SIZE_512K:
124 : tseg_size = KB(512);
125 0 : break;
126 : case I845_TSEG_SIZE_1M:
127 : tseg_size = MB(1);
128 0 : break;
129 : }
130 : }
131 :
132 0 : pci_bus_read_config_word(dev->pdev->bus, PCI_DEVFN(0, 0),
133 : I865_TOUD, &toud);
134 :
135 0 : base = (toud << 16) + tseg_size;
136 0 : } else if (IS_I85X(dev)) {
137 : u32 tseg_size = 0;
138 : u32 tom;
139 0 : u8 tmp;
140 :
141 0 : pci_bus_read_config_byte(dev->pdev->bus, PCI_DEVFN(0, 0),
142 : I85X_ESMRAMC, &tmp);
143 :
144 0 : if (tmp & TSEG_ENABLE)
145 0 : tseg_size = MB(1);
146 :
147 0 : pci_bus_read_config_byte(dev->pdev->bus, PCI_DEVFN(0, 1),
148 : I85X_DRB3, &tmp);
149 0 : tom = tmp * MB(32);
150 :
151 0 : base = tom - tseg_size - dev_priv->gtt.stolen_size;
152 0 : } else if (IS_845G(dev)) {
153 : u32 tseg_size = 0;
154 : u32 tom;
155 0 : u8 tmp;
156 :
157 0 : pci_bus_read_config_byte(dev->pdev->bus, PCI_DEVFN(0, 0),
158 : I845_ESMRAMC, &tmp);
159 :
160 0 : if (tmp & TSEG_ENABLE) {
161 0 : switch (tmp & I845_TSEG_SIZE_MASK) {
162 : case I845_TSEG_SIZE_512K:
163 : tseg_size = KB(512);
164 0 : break;
165 : case I845_TSEG_SIZE_1M:
166 : tseg_size = MB(1);
167 0 : break;
168 : }
169 : }
170 :
171 0 : pci_bus_read_config_byte(dev->pdev->bus, PCI_DEVFN(0, 0),
172 : I830_DRB3, &tmp);
173 0 : tom = tmp * MB(32);
174 :
175 0 : base = tom - tseg_size - dev_priv->gtt.stolen_size;
176 0 : } else if (IS_I830(dev)) {
177 : u32 tseg_size = 0;
178 : u32 tom;
179 0 : u8 tmp;
180 :
181 0 : pci_bus_read_config_byte(dev->pdev->bus, PCI_DEVFN(0, 0),
182 : I830_ESMRAMC, &tmp);
183 :
184 0 : if (tmp & TSEG_ENABLE) {
185 0 : if (tmp & I830_TSEG_SIZE_1M)
186 0 : tseg_size = MB(1);
187 : else
188 : tseg_size = KB(512);
189 : }
190 :
191 0 : pci_bus_read_config_byte(dev->pdev->bus, PCI_DEVFN(0, 0),
192 : I830_DRB3, &tmp);
193 0 : tom = tmp * MB(32);
194 :
195 0 : base = tom - tseg_size - dev_priv->gtt.stolen_size;
196 0 : }
197 :
198 0 : if (base == 0)
199 0 : return 0;
200 :
201 : /* make sure we don't clobber the GTT if it's within stolen memory */
202 0 : if (INTEL_INFO(dev)->gen <= 4 && !IS_G33(dev) && !IS_G4X(dev)) {
203 : struct {
204 : u32 start, end;
205 : } stolen[2] = {
206 0 : { .start = base, .end = base + dev_priv->gtt.stolen_size, },
207 : { .start = base, .end = base + dev_priv->gtt.stolen_size, },
208 : };
209 : u64 gtt_start, gtt_end;
210 :
211 0 : gtt_start = I915_READ(PGTBL_CTL);
212 0 : if (IS_GEN4(dev))
213 0 : gtt_start = (gtt_start & PGTBL_ADDRESS_LO_MASK) |
214 0 : (gtt_start & PGTBL_ADDRESS_HI_MASK) << 28;
215 : else
216 : gtt_start &= PGTBL_ADDRESS_LO_MASK;
217 0 : gtt_end = gtt_start + gtt_total_entries(dev_priv->gtt) * 4;
218 :
219 0 : if (gtt_start >= stolen[0].start && gtt_start < stolen[0].end)
220 0 : stolen[0].end = gtt_start;
221 0 : if (gtt_end > stolen[1].start && gtt_end <= stolen[1].end)
222 0 : stolen[1].start = gtt_end;
223 :
224 : /* pick the larger of the two chunks */
225 0 : if (stolen[0].end - stolen[0].start >
226 0 : stolen[1].end - stolen[1].start) {
227 0 : base = stolen[0].start;
228 0 : dev_priv->gtt.stolen_size = stolen[0].end - stolen[0].start;
229 0 : } else {
230 0 : base = stolen[1].start;
231 0 : dev_priv->gtt.stolen_size = stolen[1].end - stolen[1].start;
232 : }
233 :
234 : if (stolen[0].start != stolen[1].start ||
235 : stolen[0].end != stolen[1].end) {
236 : DRM_DEBUG_KMS("GTT within stolen memory at 0x%llx-0x%llx\n",
237 : (unsigned long long) gtt_start,
238 : (unsigned long long) gtt_end - 1);
239 : DRM_DEBUG_KMS("Stolen memory adjusted to 0x%x-0x%x\n",
240 : base, base + (u32) dev_priv->gtt.stolen_size - 1);
241 : }
242 0 : }
243 :
244 :
245 : #ifdef __linux__
246 : /* Verify that nothing else uses this physical address. Stolen
247 : * memory should be reserved by the BIOS and hidden from the
248 : * kernel. So if the region is already marked as busy, something
249 : * is seriously wrong.
250 : */
251 : r = devm_request_mem_region(dev->dev, base, dev_priv->gtt.stolen_size,
252 : "Graphics Stolen Memory");
253 : if (r == NULL) {
254 : /*
255 : * One more attempt but this time requesting region from
256 : * base + 1, as we have seen that this resolves the region
257 : * conflict with the PCI Bus.
258 : * This is a BIOS w/a: Some BIOS wrap stolen in the root
259 : * PCI bus, but have an off-by-one error. Hence retry the
260 : * reservation starting from 1 instead of 0.
261 : */
262 : r = devm_request_mem_region(dev->dev, base + 1,
263 : dev_priv->gtt.stolen_size - 1,
264 : "Graphics Stolen Memory");
265 : /*
266 : * GEN3 firmware likes to smash pci bridges into the stolen
267 : * range. Apparently this works.
268 : */
269 : if (r == NULL && !IS_GEN3(dev)) {
270 : DRM_ERROR("conflict detected with stolen region: [0x%08x - 0x%08x]\n",
271 : base, base + (uint32_t)dev_priv->gtt.stolen_size);
272 : base = 0;
273 : }
274 : }
275 : #endif
276 :
277 0 : return base;
278 0 : }
279 :
280 0 : void i915_gem_cleanup_stolen(struct drm_device *dev)
281 : {
282 0 : struct drm_i915_private *dev_priv = dev->dev_private;
283 :
284 0 : if (!drm_mm_initialized(&dev_priv->mm.stolen))
285 0 : return;
286 :
287 0 : drm_mm_takedown(&dev_priv->mm.stolen);
288 0 : }
289 :
290 0 : static void g4x_get_stolen_reserved(struct drm_i915_private *dev_priv,
291 : unsigned long *base, unsigned long *size)
292 : {
293 0 : uint32_t reg_val = I915_READ(IS_GM45(dev_priv) ?
294 : CTG_STOLEN_RESERVED :
295 : ELK_STOLEN_RESERVED);
296 0 : unsigned long stolen_top = dev_priv->mm.stolen_base +
297 0 : dev_priv->gtt.stolen_size;
298 :
299 0 : *base = (reg_val & G4X_STOLEN_RESERVED_ADDR2_MASK) << 16;
300 :
301 0 : WARN_ON((reg_val & G4X_STOLEN_RESERVED_ADDR1_MASK) < *base);
302 :
303 : /* On these platforms, the register doesn't have a size field, so the
304 : * size is the distance between the base and the top of the stolen
305 : * memory. We also have the genuine case where base is zero and there's
306 : * nothing reserved. */
307 0 : if (*base == 0)
308 0 : *size = 0;
309 : else
310 0 : *size = stolen_top - *base;
311 0 : }
312 :
313 0 : static void gen6_get_stolen_reserved(struct drm_i915_private *dev_priv,
314 : unsigned long *base, unsigned long *size)
315 : {
316 0 : uint32_t reg_val = I915_READ(GEN6_STOLEN_RESERVED);
317 :
318 0 : *base = reg_val & GEN6_STOLEN_RESERVED_ADDR_MASK;
319 :
320 0 : switch (reg_val & GEN6_STOLEN_RESERVED_SIZE_MASK) {
321 : case GEN6_STOLEN_RESERVED_1M:
322 0 : *size = 1024 * 1024;
323 0 : break;
324 : case GEN6_STOLEN_RESERVED_512K:
325 0 : *size = 512 * 1024;
326 0 : break;
327 : case GEN6_STOLEN_RESERVED_256K:
328 0 : *size = 256 * 1024;
329 0 : break;
330 : case GEN6_STOLEN_RESERVED_128K:
331 0 : *size = 128 * 1024;
332 0 : break;
333 : default:
334 : *size = 1024 * 1024;
335 : MISSING_CASE(reg_val & GEN6_STOLEN_RESERVED_SIZE_MASK);
336 : }
337 0 : }
338 :
339 0 : static void gen7_get_stolen_reserved(struct drm_i915_private *dev_priv,
340 : unsigned long *base, unsigned long *size)
341 : {
342 0 : uint32_t reg_val = I915_READ(GEN6_STOLEN_RESERVED);
343 :
344 0 : *base = reg_val & GEN7_STOLEN_RESERVED_ADDR_MASK;
345 :
346 0 : switch (reg_val & GEN7_STOLEN_RESERVED_SIZE_MASK) {
347 : case GEN7_STOLEN_RESERVED_1M:
348 0 : *size = 1024 * 1024;
349 0 : break;
350 : case GEN7_STOLEN_RESERVED_256K:
351 0 : *size = 256 * 1024;
352 0 : break;
353 : default:
354 : *size = 1024 * 1024;
355 : MISSING_CASE(reg_val & GEN7_STOLEN_RESERVED_SIZE_MASK);
356 : }
357 0 : }
358 :
359 0 : static void gen8_get_stolen_reserved(struct drm_i915_private *dev_priv,
360 : unsigned long *base, unsigned long *size)
361 : {
362 0 : uint32_t reg_val = I915_READ(GEN6_STOLEN_RESERVED);
363 :
364 0 : *base = reg_val & GEN6_STOLEN_RESERVED_ADDR_MASK;
365 :
366 0 : switch (reg_val & GEN8_STOLEN_RESERVED_SIZE_MASK) {
367 : case GEN8_STOLEN_RESERVED_1M:
368 0 : *size = 1024 * 1024;
369 0 : break;
370 : case GEN8_STOLEN_RESERVED_2M:
371 0 : *size = 2 * 1024 * 1024;
372 0 : break;
373 : case GEN8_STOLEN_RESERVED_4M:
374 0 : *size = 4 * 1024 * 1024;
375 0 : break;
376 : case GEN8_STOLEN_RESERVED_8M:
377 0 : *size = 8 * 1024 * 1024;
378 0 : break;
379 : default:
380 : *size = 8 * 1024 * 1024;
381 : MISSING_CASE(reg_val & GEN8_STOLEN_RESERVED_SIZE_MASK);
382 : }
383 0 : }
384 :
385 0 : static void bdw_get_stolen_reserved(struct drm_i915_private *dev_priv,
386 : unsigned long *base, unsigned long *size)
387 : {
388 0 : uint32_t reg_val = I915_READ(GEN6_STOLEN_RESERVED);
389 : unsigned long stolen_top;
390 :
391 0 : stolen_top = dev_priv->mm.stolen_base + dev_priv->gtt.stolen_size;
392 :
393 0 : *base = reg_val & GEN6_STOLEN_RESERVED_ADDR_MASK;
394 :
395 : /* On these platforms, the register doesn't have a size field, so the
396 : * size is the distance between the base and the top of the stolen
397 : * memory. We also have the genuine case where base is zero and there's
398 : * nothing reserved. */
399 0 : if (*base == 0)
400 0 : *size = 0;
401 : else
402 0 : *size = stolen_top - *base;
403 0 : }
404 :
405 0 : int i915_gem_init_stolen(struct drm_device *dev)
406 : {
407 0 : struct drm_i915_private *dev_priv = dev->dev_private;
408 0 : unsigned long reserved_total, reserved_base = 0, reserved_size;
409 : unsigned long stolen_top;
410 :
411 0 : rw_init(&dev_priv->mm.stolen_lock, "stln");
412 :
413 : #ifdef CONFIG_INTEL_IOMMU
414 : if (intel_iommu_gfx_mapped && INTEL_INFO(dev)->gen < 8) {
415 : DRM_INFO("DMAR active, disabling use of stolen memory\n");
416 : return 0;
417 : }
418 : #endif
419 :
420 0 : if (dev_priv->gtt.stolen_size == 0)
421 0 : return 0;
422 :
423 0 : dev_priv->mm.stolen_base = i915_stolen_to_physical(dev);
424 0 : if (dev_priv->mm.stolen_base == 0)
425 0 : return 0;
426 :
427 0 : stolen_top = dev_priv->mm.stolen_base + dev_priv->gtt.stolen_size;
428 :
429 0 : switch (INTEL_INFO(dev_priv)->gen) {
430 : case 2:
431 : case 3:
432 : break;
433 : case 4:
434 0 : if (IS_G4X(dev))
435 0 : g4x_get_stolen_reserved(dev_priv, &reserved_base,
436 : &reserved_size);
437 : break;
438 : case 5:
439 : /* Assume the gen6 maximum for the older platforms. */
440 0 : reserved_size = 1024 * 1024;
441 0 : reserved_base = stolen_top - reserved_size;
442 0 : break;
443 : case 6:
444 0 : gen6_get_stolen_reserved(dev_priv, &reserved_base,
445 : &reserved_size);
446 0 : break;
447 : case 7:
448 0 : gen7_get_stolen_reserved(dev_priv, &reserved_base,
449 : &reserved_size);
450 0 : break;
451 : default:
452 0 : if (IS_BROADWELL(dev_priv) ||
453 0 : IS_SKYLAKE(dev_priv) || IS_KABYLAKE(dev))
454 0 : bdw_get_stolen_reserved(dev_priv, &reserved_base,
455 : &reserved_size);
456 : else
457 0 : gen8_get_stolen_reserved(dev_priv, &reserved_base,
458 : &reserved_size);
459 : break;
460 : }
461 :
462 : /* It is possible for the reserved base to be zero, but the register
463 : * field for size doesn't have a zero option. */
464 0 : if (reserved_base == 0) {
465 0 : reserved_size = 0;
466 0 : reserved_base = stolen_top;
467 0 : }
468 :
469 0 : if (reserved_base < dev_priv->mm.stolen_base ||
470 0 : reserved_base + reserved_size > stolen_top) {
471 : DRM_DEBUG_KMS("Stolen reserved area [0x%08lx - 0x%08lx] outside stolen memory [0x%08lx - 0x%08lx]\n",
472 : reserved_base, reserved_base + reserved_size,
473 : dev_priv->mm.stolen_base, stolen_top);
474 0 : return 0;
475 : }
476 :
477 : /* It is possible for the reserved area to end before the end of stolen
478 : * memory, so just consider the start. */
479 0 : reserved_total = stolen_top - reserved_base;
480 :
481 : DRM_DEBUG_KMS("Memory reserved for graphics device: %zuK, usable: %luK\n",
482 : dev_priv->gtt.stolen_size >> 10,
483 : (dev_priv->gtt.stolen_size - reserved_total) >> 10);
484 :
485 0 : dev_priv->gtt.stolen_usable_size = dev_priv->gtt.stolen_size -
486 : reserved_total;
487 :
488 : /*
489 : * Basic memrange allocator for stolen space.
490 : *
491 : * TODO: Notice that some platforms require us to not use the first page
492 : * of the stolen memory but their BIOSes may still put the framebuffer
493 : * on the first page. So we don't reserve this page for now because of
494 : * that. Our current solution is to just prevent new nodes from being
495 : * inserted on the first page - see the check we have at
496 : * i915_gem_stolen_insert_node_in_range(). We may want to fix the fbcon
497 : * problem later.
498 : */
499 0 : drm_mm_init(&dev_priv->mm.stolen, 0, dev_priv->gtt.stolen_usable_size);
500 :
501 0 : return 0;
502 0 : }
503 :
504 : static struct sg_table *
505 0 : i915_pages_create_for_stolen(struct drm_device *dev,
506 : u32 offset, u32 size)
507 : {
508 0 : struct drm_i915_private *dev_priv = dev->dev_private;
509 : struct sg_table *st;
510 : struct scatterlist *sg;
511 :
512 : DRM_DEBUG_DRIVER("offset=0x%x, size=%d\n", offset, size);
513 0 : BUG_ON(offset > dev_priv->gtt.stolen_size - size);
514 :
515 : /* We hide that we have no struct page backing our stolen object
516 : * by wrapping the contiguous physical allocation with a fake
517 : * dma mapping in a single scatterlist.
518 : */
519 :
520 0 : st = kmalloc(sizeof(*st), GFP_KERNEL);
521 0 : if (st == NULL)
522 0 : return NULL;
523 :
524 0 : if (sg_alloc_table(st, 1, GFP_KERNEL)) {
525 0 : kfree(st);
526 0 : return NULL;
527 : }
528 :
529 0 : sg = st->sgl;
530 0 : sg->offset = 0;
531 0 : sg->length = size;
532 :
533 0 : sg_dma_address(sg) = (dma_addr_t)dev_priv->mm.stolen_base + offset;
534 0 : sg_dma_len(sg) = size;
535 :
536 0 : return st;
537 0 : }
538 :
539 0 : static int i915_gem_object_get_pages_stolen(struct drm_i915_gem_object *obj)
540 : {
541 0 : BUG();
542 : return -EINVAL;
543 : }
544 :
545 0 : static void i915_gem_object_put_pages_stolen(struct drm_i915_gem_object *obj)
546 : {
547 : /* Should only be called during free */
548 0 : sg_free_table(obj->pages);
549 0 : kfree(obj->pages);
550 0 : }
551 :
552 :
553 : static void
554 0 : i915_gem_object_release_stolen(struct drm_i915_gem_object *obj)
555 : {
556 0 : struct drm_i915_private *dev_priv = obj->base.dev->dev_private;
557 :
558 0 : if (obj->stolen) {
559 0 : i915_gem_stolen_remove_node(dev_priv, obj->stolen);
560 0 : kfree(obj->stolen);
561 0 : obj->stolen = NULL;
562 0 : }
563 0 : }
564 : static const struct drm_i915_gem_object_ops i915_gem_object_stolen_ops = {
565 : .get_pages = i915_gem_object_get_pages_stolen,
566 : .put_pages = i915_gem_object_put_pages_stolen,
567 : .release = i915_gem_object_release_stolen,
568 : };
569 :
570 : static struct drm_i915_gem_object *
571 0 : _i915_gem_object_create_stolen(struct drm_device *dev,
572 : struct drm_mm_node *stolen)
573 : {
574 : struct drm_i915_gem_object *obj;
575 :
576 0 : obj = i915_gem_object_alloc(dev);
577 0 : if (obj == NULL)
578 0 : return NULL;
579 :
580 0 : drm_gem_private_object_init(dev, &obj->base, stolen->size);
581 0 : i915_gem_object_init(obj, &i915_gem_object_stolen_ops);
582 :
583 0 : obj->pages = i915_pages_create_for_stolen(dev,
584 0 : stolen->start, stolen->size);
585 0 : if (obj->pages == NULL)
586 : goto cleanup;
587 :
588 0 : i915_gem_object_pin_pages(obj);
589 0 : obj->stolen = stolen;
590 :
591 0 : obj->base.read_domains = I915_GEM_DOMAIN_CPU | I915_GEM_DOMAIN_GTT;
592 0 : obj->cache_level = HAS_LLC(dev) ? I915_CACHE_LLC : I915_CACHE_NONE;
593 :
594 0 : return obj;
595 :
596 : cleanup:
597 0 : i915_gem_object_free(obj);
598 0 : return NULL;
599 0 : }
600 :
601 : struct drm_i915_gem_object *
602 0 : i915_gem_object_create_stolen(struct drm_device *dev, u32 size)
603 : {
604 0 : struct drm_i915_private *dev_priv = dev->dev_private;
605 : struct drm_i915_gem_object *obj;
606 : struct drm_mm_node *stolen;
607 : int ret;
608 :
609 0 : if (!drm_mm_initialized(&dev_priv->mm.stolen))
610 0 : return NULL;
611 :
612 : DRM_DEBUG_KMS("creating stolen object: size=%x\n", size);
613 0 : if (size == 0)
614 0 : return NULL;
615 :
616 0 : stolen = kzalloc(sizeof(*stolen), GFP_KERNEL);
617 0 : if (!stolen)
618 0 : return NULL;
619 :
620 0 : ret = i915_gem_stolen_insert_node(dev_priv, stolen, size, 4096);
621 0 : if (ret) {
622 0 : kfree(stolen);
623 0 : return NULL;
624 : }
625 :
626 0 : obj = _i915_gem_object_create_stolen(dev, stolen);
627 0 : if (obj)
628 0 : return obj;
629 :
630 0 : i915_gem_stolen_remove_node(dev_priv, stolen);
631 0 : kfree(stolen);
632 0 : return NULL;
633 0 : }
634 :
635 : struct drm_i915_gem_object *
636 0 : i915_gem_object_create_stolen_for_preallocated(struct drm_device *dev,
637 : u32 stolen_offset,
638 : u32 gtt_offset,
639 : u32 size)
640 : {
641 0 : struct drm_i915_private *dev_priv = dev->dev_private;
642 0 : struct i915_address_space *ggtt = &dev_priv->gtt.base;
643 : struct drm_i915_gem_object *obj;
644 : struct drm_mm_node *stolen;
645 : struct i915_vma *vma;
646 : int ret;
647 :
648 0 : if (!drm_mm_initialized(&dev_priv->mm.stolen))
649 0 : return NULL;
650 :
651 : DRM_DEBUG_KMS("creating preallocated stolen object: stolen_offset=%x, gtt_offset=%x, size=%x\n",
652 : stolen_offset, gtt_offset, size);
653 :
654 : /* KISS and expect everything to be page-aligned */
655 0 : if (WARN_ON(size == 0) || WARN_ON(size & 4095) ||
656 0 : WARN_ON(stolen_offset & 4095))
657 0 : return NULL;
658 :
659 0 : stolen = kzalloc(sizeof(*stolen), GFP_KERNEL);
660 0 : if (!stolen)
661 0 : return NULL;
662 :
663 0 : stolen->start = stolen_offset;
664 0 : stolen->size = size;
665 0 : mutex_lock(&dev_priv->mm.stolen_lock);
666 0 : ret = drm_mm_reserve_node(&dev_priv->mm.stolen, stolen);
667 0 : mutex_unlock(&dev_priv->mm.stolen_lock);
668 0 : if (ret) {
669 : DRM_DEBUG_KMS("failed to allocate stolen space\n");
670 0 : kfree(stolen);
671 0 : return NULL;
672 : }
673 :
674 0 : obj = _i915_gem_object_create_stolen(dev, stolen);
675 0 : if (obj == NULL) {
676 : DRM_DEBUG_KMS("failed to allocate stolen object\n");
677 0 : i915_gem_stolen_remove_node(dev_priv, stolen);
678 0 : kfree(stolen);
679 0 : return NULL;
680 : }
681 :
682 : /* Some objects just need physical mem from stolen space */
683 0 : if (gtt_offset == I915_GTT_OFFSET_NONE)
684 0 : return obj;
685 :
686 0 : vma = i915_gem_obj_lookup_or_create_vma(obj, ggtt);
687 0 : if (IS_ERR(vma)) {
688 0 : ret = PTR_ERR(vma);
689 0 : goto err;
690 : }
691 :
692 : /* To simplify the initialisation sequence between KMS and GTT,
693 : * we allow construction of the stolen object prior to
694 : * setting up the GTT space. The actual reservation will occur
695 : * later.
696 : */
697 0 : vma->node.start = gtt_offset;
698 0 : vma->node.size = size;
699 0 : if (drm_mm_initialized(&ggtt->mm)) {
700 0 : ret = drm_mm_reserve_node(&ggtt->mm, &vma->node);
701 0 : if (ret) {
702 : DRM_DEBUG_KMS("failed to allocate stolen GTT space\n");
703 : goto err;
704 : }
705 :
706 0 : vma->bound |= GLOBAL_BIND;
707 0 : __i915_vma_set_map_and_fenceable(vma);
708 0 : list_add_tail(&vma->mm_list, &ggtt->inactive_list);
709 0 : }
710 :
711 0 : list_add_tail(&obj->global_list, &dev_priv->mm.bound_list);
712 0 : i915_gem_object_pin_pages(obj);
713 :
714 0 : return obj;
715 :
716 : err:
717 0 : drm_gem_object_unreference(&obj->base);
718 0 : return NULL;
719 0 : }
|
