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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 | ||
0ad98c74 VS |
33 | #define KB(x) ((x) * 1024) |
34 | #define MB(x) (KB(x) * 1024) | |
35 | ||
9797fbfb CW |
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 | ||
a9da512b PZ |
48 | 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) | |
d713fd49 | 51 | { |
92e97d2f PZ |
52 | int ret; |
53 | ||
d713fd49 PZ |
54 | if (!drm_mm_initialized(&dev_priv->mm.stolen)) |
55 | return -ENODEV; | |
56 | ||
1ca36d4c PZ |
57 | /* See the comment at the drm_mm_init() call for more about this check. |
58 | * WaSkipStolenMemoryFirstPage:bdw,chv (incomplete) */ | |
59 | if (INTEL_INFO(dev_priv)->gen == 8 && start < 4096) | |
60 | start = 4096; | |
61 | ||
92e97d2f | 62 | mutex_lock(&dev_priv->mm.stolen_lock); |
a9da512b PZ |
63 | ret = drm_mm_insert_node_in_range(&dev_priv->mm.stolen, node, size, |
64 | alignment, start, end, | |
65 | DRM_MM_SEARCH_DEFAULT); | |
92e97d2f PZ |
66 | mutex_unlock(&dev_priv->mm.stolen_lock); |
67 | ||
68 | return ret; | |
d713fd49 PZ |
69 | } |
70 | ||
a9da512b PZ |
71 | int i915_gem_stolen_insert_node(struct drm_i915_private *dev_priv, |
72 | struct drm_mm_node *node, u64 size, | |
73 | unsigned alignment) | |
74 | { | |
75 | return i915_gem_stolen_insert_node_in_range(dev_priv, node, size, | |
76 | alignment, 0, | |
77 | dev_priv->gtt.stolen_usable_size); | |
78 | } | |
79 | ||
d713fd49 PZ |
80 | void i915_gem_stolen_remove_node(struct drm_i915_private *dev_priv, |
81 | struct drm_mm_node *node) | |
82 | { | |
92e97d2f | 83 | mutex_lock(&dev_priv->mm.stolen_lock); |
d713fd49 | 84 | drm_mm_remove_node(node); |
92e97d2f | 85 | mutex_unlock(&dev_priv->mm.stolen_lock); |
d713fd49 PZ |
86 | } |
87 | ||
e12a2d53 | 88 | static unsigned long i915_stolen_to_physical(struct drm_device *dev) |
9797fbfb CW |
89 | { |
90 | struct drm_i915_private *dev_priv = dev->dev_private; | |
eaba1b8f | 91 | struct resource *r; |
9797fbfb CW |
92 | u32 base; |
93 | ||
17fec8a0 CW |
94 | /* Almost universally we can find the Graphics Base of Stolen Memory |
95 | * at offset 0x5c in the igfx configuration space. On a few (desktop) | |
96 | * machines this is also mirrored in the bridge device at different | |
0ad98c74 VS |
97 | * locations, or in the MCHBAR. |
98 | * | |
99 | * On 865 we just check the TOUD register. | |
100 | * | |
101 | * On 830/845/85x the stolen memory base isn't available in any | |
102 | * register. We need to calculate it as TOM-TSEG_SIZE-stolen_size. | |
e12a2d53 | 103 | * |
9797fbfb | 104 | */ |
e12a2d53 | 105 | base = 0; |
17fec8a0 CW |
106 | if (INTEL_INFO(dev)->gen >= 3) { |
107 | /* Read Graphics Base of Stolen Memory directly */ | |
c9cddffc JB |
108 | pci_read_config_dword(dev->pdev, 0x5c, &base); |
109 | base &= ~((1<<20) - 1); | |
0ad98c74 VS |
110 | } else if (IS_I865G(dev)) { |
111 | u16 toud = 0; | |
112 | ||
113 | /* | |
114 | * FIXME is the graphics stolen memory region | |
115 | * always at TOUD? Ie. is it always the last | |
116 | * one to be allocated by the BIOS? | |
117 | */ | |
118 | pci_bus_read_config_word(dev->pdev->bus, PCI_DEVFN(0, 0), | |
119 | I865_TOUD, &toud); | |
120 | ||
121 | base = toud << 16; | |
122 | } else if (IS_I85X(dev)) { | |
123 | u32 tseg_size = 0; | |
124 | u32 tom; | |
125 | u8 tmp; | |
126 | ||
127 | pci_bus_read_config_byte(dev->pdev->bus, PCI_DEVFN(0, 0), | |
128 | I85X_ESMRAMC, &tmp); | |
129 | ||
130 | if (tmp & TSEG_ENABLE) | |
131 | tseg_size = MB(1); | |
132 | ||
133 | pci_bus_read_config_byte(dev->pdev->bus, PCI_DEVFN(0, 1), | |
134 | I85X_DRB3, &tmp); | |
135 | tom = tmp * MB(32); | |
136 | ||
137 | base = tom - tseg_size - dev_priv->gtt.stolen_size; | |
138 | } else if (IS_845G(dev)) { | |
139 | u32 tseg_size = 0; | |
140 | u32 tom; | |
141 | u8 tmp; | |
142 | ||
143 | pci_bus_read_config_byte(dev->pdev->bus, PCI_DEVFN(0, 0), | |
144 | I845_ESMRAMC, &tmp); | |
145 | ||
146 | if (tmp & TSEG_ENABLE) { | |
147 | switch (tmp & I845_TSEG_SIZE_MASK) { | |
148 | case I845_TSEG_SIZE_512K: | |
149 | tseg_size = KB(512); | |
150 | break; | |
151 | case I845_TSEG_SIZE_1M: | |
152 | tseg_size = MB(1); | |
153 | break; | |
154 | } | |
155 | } | |
156 | ||
157 | pci_bus_read_config_byte(dev->pdev->bus, PCI_DEVFN(0, 0), | |
158 | I830_DRB3, &tmp); | |
159 | tom = tmp * MB(32); | |
160 | ||
161 | base = tom - tseg_size - dev_priv->gtt.stolen_size; | |
162 | } else if (IS_I830(dev)) { | |
163 | u32 tseg_size = 0; | |
164 | u32 tom; | |
165 | u8 tmp; | |
166 | ||
167 | pci_bus_read_config_byte(dev->pdev->bus, PCI_DEVFN(0, 0), | |
168 | I830_ESMRAMC, &tmp); | |
169 | ||
170 | if (tmp & TSEG_ENABLE) { | |
171 | if (tmp & I830_TSEG_SIZE_1M) | |
172 | tseg_size = MB(1); | |
173 | else | |
174 | tseg_size = KB(512); | |
175 | } | |
176 | ||
177 | pci_bus_read_config_byte(dev->pdev->bus, PCI_DEVFN(0, 0), | |
178 | I830_DRB3, &tmp); | |
179 | tom = tmp * MB(32); | |
180 | ||
181 | base = tom - tseg_size - dev_priv->gtt.stolen_size; | |
e12a2d53 | 182 | } |
9797fbfb | 183 | |
eaba1b8f CW |
184 | if (base == 0) |
185 | return 0; | |
186 | ||
f1e1c212 VS |
187 | /* make sure we don't clobber the GTT if it's within stolen memory */ |
188 | if (INTEL_INFO(dev)->gen <= 4 && !IS_G33(dev) && !IS_G4X(dev)) { | |
189 | struct { | |
190 | u32 start, end; | |
191 | } stolen[2] = { | |
192 | { .start = base, .end = base + dev_priv->gtt.stolen_size, }, | |
193 | { .start = base, .end = base + dev_priv->gtt.stolen_size, }, | |
194 | }; | |
195 | u64 gtt_start, gtt_end; | |
196 | ||
197 | gtt_start = I915_READ(PGTBL_CTL); | |
198 | if (IS_GEN4(dev)) | |
199 | gtt_start = (gtt_start & PGTBL_ADDRESS_LO_MASK) | | |
200 | (gtt_start & PGTBL_ADDRESS_HI_MASK) << 28; | |
201 | else | |
202 | gtt_start &= PGTBL_ADDRESS_LO_MASK; | |
203 | gtt_end = gtt_start + gtt_total_entries(dev_priv->gtt) * 4; | |
204 | ||
205 | if (gtt_start >= stolen[0].start && gtt_start < stolen[0].end) | |
206 | stolen[0].end = gtt_start; | |
207 | if (gtt_end > stolen[1].start && gtt_end <= stolen[1].end) | |
208 | stolen[1].start = gtt_end; | |
209 | ||
210 | /* pick the larger of the two chunks */ | |
211 | if (stolen[0].end - stolen[0].start > | |
212 | stolen[1].end - stolen[1].start) { | |
213 | base = stolen[0].start; | |
214 | dev_priv->gtt.stolen_size = stolen[0].end - stolen[0].start; | |
215 | } else { | |
216 | base = stolen[1].start; | |
217 | dev_priv->gtt.stolen_size = stolen[1].end - stolen[1].start; | |
218 | } | |
219 | ||
220 | if (stolen[0].start != stolen[1].start || | |
221 | stolen[0].end != stolen[1].end) { | |
222 | DRM_DEBUG_KMS("GTT within stolen memory at 0x%llx-0x%llx\n", | |
223 | (unsigned long long) gtt_start, | |
224 | (unsigned long long) gtt_end - 1); | |
225 | DRM_DEBUG_KMS("Stolen memory adjusted to 0x%x-0x%x\n", | |
226 | base, base + (u32) dev_priv->gtt.stolen_size - 1); | |
227 | } | |
228 | } | |
229 | ||
230 | ||
eaba1b8f CW |
231 | /* Verify that nothing else uses this physical address. Stolen |
232 | * memory should be reserved by the BIOS and hidden from the | |
233 | * kernel. So if the region is already marked as busy, something | |
234 | * is seriously wrong. | |
235 | */ | |
236 | r = devm_request_mem_region(dev->dev, base, dev_priv->gtt.stolen_size, | |
237 | "Graphics Stolen Memory"); | |
238 | if (r == NULL) { | |
3617dc96 AG |
239 | /* |
240 | * One more attempt but this time requesting region from | |
241 | * base + 1, as we have seen that this resolves the region | |
242 | * conflict with the PCI Bus. | |
243 | * This is a BIOS w/a: Some BIOS wrap stolen in the root | |
244 | * PCI bus, but have an off-by-one error. Hence retry the | |
245 | * reservation starting from 1 instead of 0. | |
246 | */ | |
247 | r = devm_request_mem_region(dev->dev, base + 1, | |
248 | dev_priv->gtt.stolen_size - 1, | |
249 | "Graphics Stolen Memory"); | |
0b6d24c0 DV |
250 | /* |
251 | * GEN3 firmware likes to smash pci bridges into the stolen | |
252 | * range. Apparently this works. | |
253 | */ | |
254 | if (r == NULL && !IS_GEN3(dev)) { | |
3617dc96 AG |
255 | DRM_ERROR("conflict detected with stolen region: [0x%08x - 0x%08x]\n", |
256 | base, base + (uint32_t)dev_priv->gtt.stolen_size); | |
257 | base = 0; | |
258 | } | |
eaba1b8f CW |
259 | } |
260 | ||
e12a2d53 | 261 | return base; |
9797fbfb CW |
262 | } |
263 | ||
9797fbfb CW |
264 | void i915_gem_cleanup_stolen(struct drm_device *dev) |
265 | { | |
4d7bb011 DV |
266 | struct drm_i915_private *dev_priv = dev->dev_private; |
267 | ||
446f8d81 DV |
268 | if (!drm_mm_initialized(&dev_priv->mm.stolen)) |
269 | return; | |
270 | ||
4d7bb011 | 271 | drm_mm_takedown(&dev_priv->mm.stolen); |
9797fbfb CW |
272 | } |
273 | ||
7d316aec VS |
274 | static void g4x_get_stolen_reserved(struct drm_i915_private *dev_priv, |
275 | unsigned long *base, unsigned long *size) | |
276 | { | |
277 | uint32_t reg_val = I915_READ(IS_GM45(dev_priv) ? | |
278 | CTG_STOLEN_RESERVED : | |
279 | ELK_STOLEN_RESERVED); | |
280 | unsigned long stolen_top = dev_priv->mm.stolen_base + | |
281 | dev_priv->gtt.stolen_size; | |
282 | ||
283 | *base = (reg_val & G4X_STOLEN_RESERVED_ADDR2_MASK) << 16; | |
284 | ||
285 | WARN_ON((reg_val & G4X_STOLEN_RESERVED_ADDR1_MASK) < *base); | |
286 | ||
287 | /* On these platforms, the register doesn't have a size field, so the | |
288 | * size is the distance between the base and the top of the stolen | |
289 | * memory. We also have the genuine case where base is zero and there's | |
290 | * nothing reserved. */ | |
291 | if (*base == 0) | |
292 | *size = 0; | |
293 | else | |
294 | *size = stolen_top - *base; | |
295 | } | |
296 | ||
3774eb50 PZ |
297 | static void gen6_get_stolen_reserved(struct drm_i915_private *dev_priv, |
298 | unsigned long *base, unsigned long *size) | |
299 | { | |
300 | uint32_t reg_val = I915_READ(GEN6_STOLEN_RESERVED); | |
301 | ||
302 | *base = reg_val & GEN6_STOLEN_RESERVED_ADDR_MASK; | |
303 | ||
304 | switch (reg_val & GEN6_STOLEN_RESERVED_SIZE_MASK) { | |
305 | case GEN6_STOLEN_RESERVED_1M: | |
306 | *size = 1024 * 1024; | |
307 | break; | |
308 | case GEN6_STOLEN_RESERVED_512K: | |
309 | *size = 512 * 1024; | |
310 | break; | |
311 | case GEN6_STOLEN_RESERVED_256K: | |
312 | *size = 256 * 1024; | |
313 | break; | |
314 | case GEN6_STOLEN_RESERVED_128K: | |
315 | *size = 128 * 1024; | |
316 | break; | |
317 | default: | |
318 | *size = 1024 * 1024; | |
319 | MISSING_CASE(reg_val & GEN6_STOLEN_RESERVED_SIZE_MASK); | |
320 | } | |
321 | } | |
322 | ||
323 | static void gen7_get_stolen_reserved(struct drm_i915_private *dev_priv, | |
324 | unsigned long *base, unsigned long *size) | |
325 | { | |
326 | uint32_t reg_val = I915_READ(GEN6_STOLEN_RESERVED); | |
327 | ||
328 | *base = reg_val & GEN7_STOLEN_RESERVED_ADDR_MASK; | |
329 | ||
330 | switch (reg_val & GEN7_STOLEN_RESERVED_SIZE_MASK) { | |
331 | case GEN7_STOLEN_RESERVED_1M: | |
332 | *size = 1024 * 1024; | |
333 | break; | |
334 | case GEN7_STOLEN_RESERVED_256K: | |
335 | *size = 256 * 1024; | |
336 | break; | |
337 | default: | |
338 | *size = 1024 * 1024; | |
339 | MISSING_CASE(reg_val & GEN7_STOLEN_RESERVED_SIZE_MASK); | |
340 | } | |
341 | } | |
342 | ||
343 | static void gen8_get_stolen_reserved(struct drm_i915_private *dev_priv, | |
344 | unsigned long *base, unsigned long *size) | |
345 | { | |
346 | uint32_t reg_val = I915_READ(GEN6_STOLEN_RESERVED); | |
347 | ||
348 | *base = reg_val & GEN6_STOLEN_RESERVED_ADDR_MASK; | |
349 | ||
350 | switch (reg_val & GEN8_STOLEN_RESERVED_SIZE_MASK) { | |
351 | case GEN8_STOLEN_RESERVED_1M: | |
352 | *size = 1024 * 1024; | |
353 | break; | |
354 | case GEN8_STOLEN_RESERVED_2M: | |
355 | *size = 2 * 1024 * 1024; | |
356 | break; | |
357 | case GEN8_STOLEN_RESERVED_4M: | |
358 | *size = 4 * 1024 * 1024; | |
359 | break; | |
360 | case GEN8_STOLEN_RESERVED_8M: | |
361 | *size = 8 * 1024 * 1024; | |
362 | break; | |
363 | default: | |
364 | *size = 8 * 1024 * 1024; | |
365 | MISSING_CASE(reg_val & GEN8_STOLEN_RESERVED_SIZE_MASK); | |
366 | } | |
367 | } | |
368 | ||
369 | static void bdw_get_stolen_reserved(struct drm_i915_private *dev_priv, | |
370 | unsigned long *base, unsigned long *size) | |
371 | { | |
372 | uint32_t reg_val = I915_READ(GEN6_STOLEN_RESERVED); | |
373 | unsigned long stolen_top; | |
374 | ||
375 | stolen_top = dev_priv->mm.stolen_base + dev_priv->gtt.stolen_size; | |
376 | ||
377 | *base = reg_val & GEN6_STOLEN_RESERVED_ADDR_MASK; | |
378 | ||
379 | /* On these platforms, the register doesn't have a size field, so the | |
380 | * size is the distance between the base and the top of the stolen | |
381 | * memory. We also have the genuine case where base is zero and there's | |
382 | * nothing reserved. */ | |
383 | if (*base == 0) | |
384 | *size = 0; | |
385 | else | |
386 | *size = stolen_top - *base; | |
387 | } | |
388 | ||
9797fbfb CW |
389 | int i915_gem_init_stolen(struct drm_device *dev) |
390 | { | |
391 | struct drm_i915_private *dev_priv = dev->dev_private; | |
d7884d69 | 392 | unsigned long reserved_total, reserved_base = 0, reserved_size; |
3774eb50 | 393 | unsigned long stolen_top; |
9797fbfb | 394 | |
92e97d2f PZ |
395 | mutex_init(&dev_priv->mm.stolen_lock); |
396 | ||
0f4706d2 | 397 | #ifdef CONFIG_INTEL_IOMMU |
fcc9fe1a | 398 | if (intel_iommu_gfx_mapped && INTEL_INFO(dev)->gen < 8) { |
0f4706d2 CW |
399 | DRM_INFO("DMAR active, disabling use of stolen memory\n"); |
400 | return 0; | |
401 | } | |
402 | #endif | |
403 | ||
6644a4e9 CW |
404 | if (dev_priv->gtt.stolen_size == 0) |
405 | return 0; | |
406 | ||
e12a2d53 CW |
407 | dev_priv->mm.stolen_base = i915_stolen_to_physical(dev); |
408 | if (dev_priv->mm.stolen_base == 0) | |
409 | return 0; | |
410 | ||
3774eb50 PZ |
411 | stolen_top = dev_priv->mm.stolen_base + dev_priv->gtt.stolen_size; |
412 | ||
413 | switch (INTEL_INFO(dev_priv)->gen) { | |
414 | case 2: | |
415 | case 3: | |
7d316aec | 416 | break; |
3774eb50 | 417 | case 4: |
7d316aec VS |
418 | if (IS_G4X(dev)) |
419 | g4x_get_stolen_reserved(dev_priv, &reserved_base, | |
420 | &reserved_size); | |
421 | break; | |
3774eb50 PZ |
422 | case 5: |
423 | /* Assume the gen6 maximum for the older platforms. */ | |
424 | reserved_size = 1024 * 1024; | |
425 | reserved_base = stolen_top - reserved_size; | |
426 | break; | |
427 | case 6: | |
428 | gen6_get_stolen_reserved(dev_priv, &reserved_base, | |
429 | &reserved_size); | |
430 | break; | |
431 | case 7: | |
432 | gen7_get_stolen_reserved(dev_priv, &reserved_base, | |
433 | &reserved_size); | |
434 | break; | |
435 | default: | |
ef11bdb3 RV |
436 | if (IS_BROADWELL(dev_priv) || |
437 | IS_SKYLAKE(dev_priv) || IS_KABYLAKE(dev)) | |
3774eb50 PZ |
438 | bdw_get_stolen_reserved(dev_priv, &reserved_base, |
439 | &reserved_size); | |
440 | else | |
441 | gen8_get_stolen_reserved(dev_priv, &reserved_base, | |
442 | &reserved_size); | |
443 | break; | |
444 | } | |
445 | ||
446 | /* It is possible for the reserved base to be zero, but the register | |
447 | * field for size doesn't have a zero option. */ | |
448 | if (reserved_base == 0) { | |
449 | reserved_size = 0; | |
450 | reserved_base = stolen_top; | |
40bae736 | 451 | } |
c9cddffc | 452 | |
3774eb50 PZ |
453 | if (reserved_base < dev_priv->mm.stolen_base || |
454 | reserved_base + reserved_size > stolen_top) { | |
455 | DRM_DEBUG_KMS("Stolen reserved area [0x%08lx - 0x%08lx] outside stolen memory [0x%08lx - 0x%08lx]\n", | |
456 | reserved_base, reserved_base + reserved_size, | |
457 | dev_priv->mm.stolen_base, stolen_top); | |
897f9ed0 | 458 | return 0; |
3774eb50 PZ |
459 | } |
460 | ||
461 | /* It is possible for the reserved area to end before the end of stolen | |
462 | * memory, so just consider the start. */ | |
463 | reserved_total = stolen_top - reserved_base; | |
464 | ||
8e9d597a | 465 | DRM_DEBUG_KMS("Memory reserved for graphics device: %zuK, usable: %luK\n", |
3774eb50 PZ |
466 | dev_priv->gtt.stolen_size >> 10, |
467 | (dev_priv->gtt.stolen_size - reserved_total) >> 10); | |
897f9ed0 | 468 | |
a9da512b PZ |
469 | dev_priv->gtt.stolen_usable_size = dev_priv->gtt.stolen_size - |
470 | reserved_total; | |
471 | ||
1ca36d4c PZ |
472 | /* |
473 | * Basic memrange allocator for stolen space. | |
474 | * | |
475 | * TODO: Notice that some platforms require us to not use the first page | |
476 | * of the stolen memory but their BIOSes may still put the framebuffer | |
477 | * on the first page. So we don't reserve this page for now because of | |
478 | * that. Our current solution is to just prevent new nodes from being | |
479 | * inserted on the first page - see the check we have at | |
480 | * i915_gem_stolen_insert_node_in_range(). We may want to fix the fbcon | |
481 | * problem later. | |
482 | */ | |
a9da512b | 483 | drm_mm_init(&dev_priv->mm.stolen, 0, dev_priv->gtt.stolen_usable_size); |
9797fbfb CW |
484 | |
485 | return 0; | |
486 | } | |
0104fdbb CW |
487 | |
488 | static struct sg_table * | |
489 | i915_pages_create_for_stolen(struct drm_device *dev, | |
490 | u32 offset, u32 size) | |
491 | { | |
492 | struct drm_i915_private *dev_priv = dev->dev_private; | |
493 | struct sg_table *st; | |
494 | struct scatterlist *sg; | |
495 | ||
496 | DRM_DEBUG_DRIVER("offset=0x%x, size=%d\n", offset, size); | |
a54c0c27 | 497 | BUG_ON(offset > dev_priv->gtt.stolen_size - size); |
0104fdbb CW |
498 | |
499 | /* We hide that we have no struct page backing our stolen object | |
500 | * by wrapping the contiguous physical allocation with a fake | |
501 | * dma mapping in a single scatterlist. | |
502 | */ | |
503 | ||
504 | st = kmalloc(sizeof(*st), GFP_KERNEL); | |
505 | if (st == NULL) | |
506 | return NULL; | |
507 | ||
508 | if (sg_alloc_table(st, 1, GFP_KERNEL)) { | |
509 | kfree(st); | |
510 | return NULL; | |
511 | } | |
512 | ||
513 | sg = st->sgl; | |
ec14ba47 | 514 | sg->offset = 0; |
ed23abdd | 515 | sg->length = size; |
0104fdbb CW |
516 | |
517 | sg_dma_address(sg) = (dma_addr_t)dev_priv->mm.stolen_base + offset; | |
518 | sg_dma_len(sg) = size; | |
519 | ||
520 | return st; | |
521 | } | |
522 | ||
523 | static int i915_gem_object_get_pages_stolen(struct drm_i915_gem_object *obj) | |
524 | { | |
525 | BUG(); | |
526 | return -EINVAL; | |
527 | } | |
528 | ||
529 | static void i915_gem_object_put_pages_stolen(struct drm_i915_gem_object *obj) | |
530 | { | |
531 | /* Should only be called during free */ | |
532 | sg_free_table(obj->pages); | |
533 | kfree(obj->pages); | |
534 | } | |
535 | ||
ef0cf27c CW |
536 | |
537 | static void | |
538 | i915_gem_object_release_stolen(struct drm_i915_gem_object *obj) | |
539 | { | |
d713fd49 PZ |
540 | struct drm_i915_private *dev_priv = obj->base.dev->dev_private; |
541 | ||
ef0cf27c | 542 | if (obj->stolen) { |
d713fd49 | 543 | i915_gem_stolen_remove_node(dev_priv, obj->stolen); |
ef0cf27c CW |
544 | kfree(obj->stolen); |
545 | obj->stolen = NULL; | |
546 | } | |
547 | } | |
0104fdbb CW |
548 | static const struct drm_i915_gem_object_ops i915_gem_object_stolen_ops = { |
549 | .get_pages = i915_gem_object_get_pages_stolen, | |
550 | .put_pages = i915_gem_object_put_pages_stolen, | |
ef0cf27c | 551 | .release = i915_gem_object_release_stolen, |
0104fdbb CW |
552 | }; |
553 | ||
554 | static struct drm_i915_gem_object * | |
555 | _i915_gem_object_create_stolen(struct drm_device *dev, | |
556 | struct drm_mm_node *stolen) | |
557 | { | |
558 | struct drm_i915_gem_object *obj; | |
559 | ||
42dcedd4 | 560 | obj = i915_gem_object_alloc(dev); |
0104fdbb CW |
561 | if (obj == NULL) |
562 | return NULL; | |
563 | ||
89c8233f | 564 | drm_gem_private_object_init(dev, &obj->base, stolen->size); |
0104fdbb CW |
565 | i915_gem_object_init(obj, &i915_gem_object_stolen_ops); |
566 | ||
567 | obj->pages = i915_pages_create_for_stolen(dev, | |
568 | stolen->start, stolen->size); | |
569 | if (obj->pages == NULL) | |
570 | goto cleanup; | |
571 | ||
dd53e1b0 | 572 | i915_gem_object_pin_pages(obj); |
0104fdbb CW |
573 | obj->stolen = stolen; |
574 | ||
d46f1c3f CW |
575 | obj->base.read_domains = I915_GEM_DOMAIN_CPU | I915_GEM_DOMAIN_GTT; |
576 | obj->cache_level = HAS_LLC(dev) ? I915_CACHE_LLC : I915_CACHE_NONE; | |
0104fdbb CW |
577 | |
578 | return obj; | |
579 | ||
580 | cleanup: | |
42dcedd4 | 581 | i915_gem_object_free(obj); |
0104fdbb CW |
582 | return NULL; |
583 | } | |
584 | ||
585 | struct drm_i915_gem_object * | |
586 | i915_gem_object_create_stolen(struct drm_device *dev, u32 size) | |
587 | { | |
588 | struct drm_i915_private *dev_priv = dev->dev_private; | |
589 | struct drm_i915_gem_object *obj; | |
590 | struct drm_mm_node *stolen; | |
06e78edf | 591 | int ret; |
0104fdbb | 592 | |
446f8d81 | 593 | if (!drm_mm_initialized(&dev_priv->mm.stolen)) |
0104fdbb CW |
594 | return NULL; |
595 | ||
596 | DRM_DEBUG_KMS("creating stolen object: size=%x\n", size); | |
597 | if (size == 0) | |
598 | return NULL; | |
599 | ||
06e78edf DH |
600 | stolen = kzalloc(sizeof(*stolen), GFP_KERNEL); |
601 | if (!stolen) | |
0104fdbb CW |
602 | return NULL; |
603 | ||
d713fd49 | 604 | ret = i915_gem_stolen_insert_node(dev_priv, stolen, size, 4096); |
06e78edf DH |
605 | if (ret) { |
606 | kfree(stolen); | |
607 | return NULL; | |
608 | } | |
609 | ||
0104fdbb CW |
610 | obj = _i915_gem_object_create_stolen(dev, stolen); |
611 | if (obj) | |
612 | return obj; | |
613 | ||
d713fd49 | 614 | i915_gem_stolen_remove_node(dev_priv, stolen); |
06e78edf | 615 | kfree(stolen); |
0104fdbb CW |
616 | return NULL; |
617 | } | |
618 | ||
866d12b4 CW |
619 | struct drm_i915_gem_object * |
620 | i915_gem_object_create_stolen_for_preallocated(struct drm_device *dev, | |
621 | u32 stolen_offset, | |
622 | u32 gtt_offset, | |
623 | u32 size) | |
624 | { | |
625 | struct drm_i915_private *dev_priv = dev->dev_private; | |
40d74980 | 626 | struct i915_address_space *ggtt = &dev_priv->gtt.base; |
866d12b4 CW |
627 | struct drm_i915_gem_object *obj; |
628 | struct drm_mm_node *stolen; | |
2f633156 | 629 | struct i915_vma *vma; |
b3a070cc | 630 | int ret; |
866d12b4 | 631 | |
446f8d81 | 632 | if (!drm_mm_initialized(&dev_priv->mm.stolen)) |
866d12b4 CW |
633 | return NULL; |
634 | ||
635 | DRM_DEBUG_KMS("creating preallocated stolen object: stolen_offset=%x, gtt_offset=%x, size=%x\n", | |
636 | stolen_offset, gtt_offset, size); | |
637 | ||
638 | /* KISS and expect everything to be page-aligned */ | |
f37b5c2b DV |
639 | if (WARN_ON(size == 0) || WARN_ON(size & 4095) || |
640 | WARN_ON(stolen_offset & 4095)) | |
866d12b4 CW |
641 | return NULL; |
642 | ||
b3a070cc BW |
643 | stolen = kzalloc(sizeof(*stolen), GFP_KERNEL); |
644 | if (!stolen) | |
645 | return NULL; | |
646 | ||
338710e7 BW |
647 | stolen->start = stolen_offset; |
648 | stolen->size = size; | |
92e97d2f | 649 | mutex_lock(&dev_priv->mm.stolen_lock); |
338710e7 | 650 | ret = drm_mm_reserve_node(&dev_priv->mm.stolen, stolen); |
92e97d2f | 651 | mutex_unlock(&dev_priv->mm.stolen_lock); |
b3a070cc | 652 | if (ret) { |
866d12b4 | 653 | DRM_DEBUG_KMS("failed to allocate stolen space\n"); |
b3a070cc | 654 | kfree(stolen); |
866d12b4 CW |
655 | return NULL; |
656 | } | |
657 | ||
658 | obj = _i915_gem_object_create_stolen(dev, stolen); | |
659 | if (obj == NULL) { | |
660 | DRM_DEBUG_KMS("failed to allocate stolen object\n"); | |
d713fd49 | 661 | i915_gem_stolen_remove_node(dev_priv, stolen); |
06e78edf | 662 | kfree(stolen); |
866d12b4 CW |
663 | return NULL; |
664 | } | |
665 | ||
3727d55e | 666 | /* Some objects just need physical mem from stolen space */ |
190d6cd5 | 667 | if (gtt_offset == I915_GTT_OFFSET_NONE) |
3727d55e JB |
668 | return obj; |
669 | ||
e656a6cb | 670 | vma = i915_gem_obj_lookup_or_create_vma(obj, ggtt); |
db473b36 DC |
671 | if (IS_ERR(vma)) { |
672 | ret = PTR_ERR(vma); | |
7c4a7d60 | 673 | goto err; |
2f633156 BW |
674 | } |
675 | ||
866d12b4 CW |
676 | /* To simplify the initialisation sequence between KMS and GTT, |
677 | * we allow construction of the stolen object prior to | |
678 | * setting up the GTT space. The actual reservation will occur | |
679 | * later. | |
680 | */ | |
2f633156 BW |
681 | vma->node.start = gtt_offset; |
682 | vma->node.size = size; | |
40d74980 BW |
683 | if (drm_mm_initialized(&ggtt->mm)) { |
684 | ret = drm_mm_reserve_node(&ggtt->mm, &vma->node); | |
b3a070cc | 685 | if (ret) { |
866d12b4 | 686 | DRM_DEBUG_KMS("failed to allocate stolen GTT space\n"); |
7c4a7d60 | 687 | goto err; |
866d12b4 | 688 | } |
866d12b4 | 689 | |
7c4a7d60 CW |
690 | vma->bound |= GLOBAL_BIND; |
691 | list_add_tail(&vma->mm_list, &ggtt->inactive_list); | |
692 | } | |
866d12b4 | 693 | |
35c20a60 | 694 | list_add_tail(&obj->global_list, &dev_priv->mm.bound_list); |
d8ccba86 | 695 | i915_gem_object_pin_pages(obj); |
866d12b4 CW |
696 | |
697 | return obj; | |
b3a070cc | 698 | |
7c4a7d60 | 699 | err: |
b3a070cc BW |
700 | drm_gem_object_unreference(&obj->base); |
701 | return NULL; | |
866d12b4 | 702 | } |