Commit | Line | Data |
---|---|---|
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 | 57 | /* See the comment at the drm_mm_init() call for more about this check. |
6e4f10c3 MK |
58 | * WaSkipStolenMemoryFirstPage:bdw,chv,kbl (incomplete) |
59 | */ | |
60 | if (start < 4096 && (IS_GEN8(dev_priv) || | |
61 | IS_KBL_REVID(dev_priv, 0, KBL_REVID_A0))) | |
1ca36d4c PZ |
62 | start = 4096; |
63 | ||
92e97d2f | 64 | mutex_lock(&dev_priv->mm.stolen_lock); |
a9da512b PZ |
65 | ret = drm_mm_insert_node_in_range(&dev_priv->mm.stolen, node, size, |
66 | alignment, start, end, | |
67 | DRM_MM_SEARCH_DEFAULT); | |
92e97d2f PZ |
68 | mutex_unlock(&dev_priv->mm.stolen_lock); |
69 | ||
70 | return ret; | |
d713fd49 PZ |
71 | } |
72 | ||
a9da512b PZ |
73 | int i915_gem_stolen_insert_node(struct drm_i915_private *dev_priv, |
74 | struct drm_mm_node *node, u64 size, | |
75 | unsigned alignment) | |
76 | { | |
72e96d64 JL |
77 | struct i915_ggtt *ggtt = &dev_priv->ggtt; |
78 | ||
a9da512b | 79 | return i915_gem_stolen_insert_node_in_range(dev_priv, node, size, |
72e96d64 JL |
80 | alignment, 0, |
81 | ggtt->stolen_usable_size); | |
a9da512b PZ |
82 | } |
83 | ||
d713fd49 PZ |
84 | void i915_gem_stolen_remove_node(struct drm_i915_private *dev_priv, |
85 | struct drm_mm_node *node) | |
86 | { | |
92e97d2f | 87 | mutex_lock(&dev_priv->mm.stolen_lock); |
d713fd49 | 88 | drm_mm_remove_node(node); |
92e97d2f | 89 | mutex_unlock(&dev_priv->mm.stolen_lock); |
d713fd49 PZ |
90 | } |
91 | ||
e12a2d53 | 92 | static unsigned long i915_stolen_to_physical(struct drm_device *dev) |
9797fbfb | 93 | { |
72e96d64 JL |
94 | struct drm_i915_private *dev_priv = to_i915(dev); |
95 | struct i915_ggtt *ggtt = &dev_priv->ggtt; | |
eaba1b8f | 96 | struct resource *r; |
9797fbfb CW |
97 | u32 base; |
98 | ||
17fec8a0 | 99 | /* Almost universally we can find the Graphics Base of Stolen Memory |
e10fa551 JL |
100 | * at register BSM (0x5c) in the igfx configuration space. On a few |
101 | * (desktop) machines this is also mirrored in the bridge device at | |
102 | * different locations, or in the MCHBAR. | |
0ad98c74 VS |
103 | * |
104 | * On 865 we just check the TOUD register. | |
105 | * | |
106 | * On 830/845/85x the stolen memory base isn't available in any | |
107 | * register. We need to calculate it as TOM-TSEG_SIZE-stolen_size. | |
e12a2d53 | 108 | * |
9797fbfb | 109 | */ |
e12a2d53 | 110 | base = 0; |
17fec8a0 | 111 | if (INTEL_INFO(dev)->gen >= 3) { |
e10fa551 JL |
112 | u32 bsm; |
113 | ||
c0dd3460 | 114 | pci_read_config_dword(dev->pdev, INTEL_BSM, &bsm); |
e10fa551 | 115 | |
c0dd3460 | 116 | base = bsm & INTEL_BSM_MASK; |
0ad98c74 VS |
117 | } else if (IS_I865G(dev)) { |
118 | u16 toud = 0; | |
119 | ||
120 | /* | |
121 | * FIXME is the graphics stolen memory region | |
122 | * always at TOUD? Ie. is it always the last | |
123 | * one to be allocated by the BIOS? | |
124 | */ | |
125 | pci_bus_read_config_word(dev->pdev->bus, PCI_DEVFN(0, 0), | |
126 | I865_TOUD, &toud); | |
127 | ||
128 | base = toud << 16; | |
129 | } else if (IS_I85X(dev)) { | |
130 | u32 tseg_size = 0; | |
131 | u32 tom; | |
132 | u8 tmp; | |
133 | ||
134 | pci_bus_read_config_byte(dev->pdev->bus, PCI_DEVFN(0, 0), | |
135 | I85X_ESMRAMC, &tmp); | |
136 | ||
137 | if (tmp & TSEG_ENABLE) | |
138 | tseg_size = MB(1); | |
139 | ||
140 | pci_bus_read_config_byte(dev->pdev->bus, PCI_DEVFN(0, 1), | |
141 | I85X_DRB3, &tmp); | |
142 | tom = tmp * MB(32); | |
143 | ||
72e96d64 | 144 | base = tom - tseg_size - ggtt->stolen_size; |
0ad98c74 VS |
145 | } else if (IS_845G(dev)) { |
146 | u32 tseg_size = 0; | |
147 | u32 tom; | |
148 | u8 tmp; | |
149 | ||
150 | pci_bus_read_config_byte(dev->pdev->bus, PCI_DEVFN(0, 0), | |
151 | I845_ESMRAMC, &tmp); | |
152 | ||
153 | if (tmp & TSEG_ENABLE) { | |
154 | switch (tmp & I845_TSEG_SIZE_MASK) { | |
155 | case I845_TSEG_SIZE_512K: | |
156 | tseg_size = KB(512); | |
157 | break; | |
158 | case I845_TSEG_SIZE_1M: | |
159 | tseg_size = MB(1); | |
160 | break; | |
161 | } | |
162 | } | |
163 | ||
164 | pci_bus_read_config_byte(dev->pdev->bus, PCI_DEVFN(0, 0), | |
165 | I830_DRB3, &tmp); | |
166 | tom = tmp * MB(32); | |
167 | ||
72e96d64 | 168 | base = tom - tseg_size - ggtt->stolen_size; |
0ad98c74 VS |
169 | } else if (IS_I830(dev)) { |
170 | u32 tseg_size = 0; | |
171 | u32 tom; | |
172 | u8 tmp; | |
173 | ||
174 | pci_bus_read_config_byte(dev->pdev->bus, PCI_DEVFN(0, 0), | |
175 | I830_ESMRAMC, &tmp); | |
176 | ||
177 | if (tmp & TSEG_ENABLE) { | |
178 | if (tmp & I830_TSEG_SIZE_1M) | |
179 | tseg_size = MB(1); | |
180 | else | |
181 | tseg_size = KB(512); | |
182 | } | |
183 | ||
184 | pci_bus_read_config_byte(dev->pdev->bus, PCI_DEVFN(0, 0), | |
185 | I830_DRB3, &tmp); | |
186 | tom = tmp * MB(32); | |
187 | ||
72e96d64 | 188 | base = tom - tseg_size - ggtt->stolen_size; |
e12a2d53 | 189 | } |
9797fbfb | 190 | |
eaba1b8f CW |
191 | if (base == 0) |
192 | return 0; | |
193 | ||
f1e1c212 VS |
194 | /* make sure we don't clobber the GTT if it's within stolen memory */ |
195 | if (INTEL_INFO(dev)->gen <= 4 && !IS_G33(dev) && !IS_G4X(dev)) { | |
196 | struct { | |
197 | u32 start, end; | |
198 | } stolen[2] = { | |
72e96d64 JL |
199 | { .start = base, .end = base + ggtt->stolen_size, }, |
200 | { .start = base, .end = base + ggtt->stolen_size, }, | |
f1e1c212 | 201 | }; |
72e96d64 | 202 | u64 ggtt_start, ggtt_end; |
f1e1c212 | 203 | |
72e96d64 | 204 | ggtt_start = I915_READ(PGTBL_CTL); |
f1e1c212 | 205 | if (IS_GEN4(dev)) |
72e96d64 JL |
206 | ggtt_start = (ggtt_start & PGTBL_ADDRESS_LO_MASK) | |
207 | (ggtt_start & PGTBL_ADDRESS_HI_MASK) << 28; | |
f1e1c212 | 208 | else |
72e96d64 JL |
209 | ggtt_start &= PGTBL_ADDRESS_LO_MASK; |
210 | ggtt_end = ggtt_start + ggtt_total_entries(ggtt) * 4; | |
f1e1c212 | 211 | |
72e96d64 JL |
212 | if (ggtt_start >= stolen[0].start && ggtt_start < stolen[0].end) |
213 | stolen[0].end = ggtt_start; | |
214 | if (ggtt_end > stolen[1].start && ggtt_end <= stolen[1].end) | |
215 | stolen[1].start = ggtt_end; | |
f1e1c212 VS |
216 | |
217 | /* pick the larger of the two chunks */ | |
218 | if (stolen[0].end - stolen[0].start > | |
219 | stolen[1].end - stolen[1].start) { | |
220 | base = stolen[0].start; | |
72e96d64 | 221 | ggtt->stolen_size = stolen[0].end - stolen[0].start; |
f1e1c212 VS |
222 | } else { |
223 | base = stolen[1].start; | |
72e96d64 | 224 | ggtt->stolen_size = stolen[1].end - stolen[1].start; |
f1e1c212 VS |
225 | } |
226 | ||
227 | if (stolen[0].start != stolen[1].start || | |
228 | stolen[0].end != stolen[1].end) { | |
229 | DRM_DEBUG_KMS("GTT within stolen memory at 0x%llx-0x%llx\n", | |
72e96d64 JL |
230 | (unsigned long long)ggtt_start, |
231 | (unsigned long long)ggtt_end - 1); | |
f1e1c212 | 232 | DRM_DEBUG_KMS("Stolen memory adjusted to 0x%x-0x%x\n", |
72e96d64 | 233 | base, base + (u32)ggtt->stolen_size - 1); |
f1e1c212 VS |
234 | } |
235 | } | |
236 | ||
237 | ||
eaba1b8f CW |
238 | /* Verify that nothing else uses this physical address. Stolen |
239 | * memory should be reserved by the BIOS and hidden from the | |
240 | * kernel. So if the region is already marked as busy, something | |
241 | * is seriously wrong. | |
242 | */ | |
72e96d64 | 243 | r = devm_request_mem_region(dev->dev, base, ggtt->stolen_size, |
eaba1b8f CW |
244 | "Graphics Stolen Memory"); |
245 | if (r == NULL) { | |
3617dc96 AG |
246 | /* |
247 | * One more attempt but this time requesting region from | |
248 | * base + 1, as we have seen that this resolves the region | |
249 | * conflict with the PCI Bus. | |
250 | * This is a BIOS w/a: Some BIOS wrap stolen in the root | |
251 | * PCI bus, but have an off-by-one error. Hence retry the | |
252 | * reservation starting from 1 instead of 0. | |
253 | */ | |
254 | r = devm_request_mem_region(dev->dev, base + 1, | |
72e96d64 | 255 | ggtt->stolen_size - 1, |
3617dc96 | 256 | "Graphics Stolen Memory"); |
0b6d24c0 DV |
257 | /* |
258 | * GEN3 firmware likes to smash pci bridges into the stolen | |
259 | * range. Apparently this works. | |
260 | */ | |
261 | if (r == NULL && !IS_GEN3(dev)) { | |
3617dc96 | 262 | DRM_ERROR("conflict detected with stolen region: [0x%08x - 0x%08x]\n", |
72e96d64 | 263 | base, base + (uint32_t)ggtt->stolen_size); |
3617dc96 AG |
264 | base = 0; |
265 | } | |
eaba1b8f CW |
266 | } |
267 | ||
e12a2d53 | 268 | return base; |
9797fbfb CW |
269 | } |
270 | ||
9797fbfb CW |
271 | void i915_gem_cleanup_stolen(struct drm_device *dev) |
272 | { | |
fac5e23e | 273 | struct drm_i915_private *dev_priv = to_i915(dev); |
4d7bb011 | 274 | |
446f8d81 DV |
275 | if (!drm_mm_initialized(&dev_priv->mm.stolen)) |
276 | return; | |
277 | ||
4d7bb011 | 278 | drm_mm_takedown(&dev_priv->mm.stolen); |
9797fbfb CW |
279 | } |
280 | ||
7d316aec VS |
281 | static void g4x_get_stolen_reserved(struct drm_i915_private *dev_priv, |
282 | unsigned long *base, unsigned long *size) | |
283 | { | |
72e96d64 | 284 | struct i915_ggtt *ggtt = &dev_priv->ggtt; |
7d316aec VS |
285 | uint32_t reg_val = I915_READ(IS_GM45(dev_priv) ? |
286 | CTG_STOLEN_RESERVED : | |
287 | ELK_STOLEN_RESERVED); | |
288 | unsigned long stolen_top = dev_priv->mm.stolen_base + | |
72e96d64 | 289 | ggtt->stolen_size; |
7d316aec VS |
290 | |
291 | *base = (reg_val & G4X_STOLEN_RESERVED_ADDR2_MASK) << 16; | |
292 | ||
293 | WARN_ON((reg_val & G4X_STOLEN_RESERVED_ADDR1_MASK) < *base); | |
294 | ||
295 | /* On these platforms, the register doesn't have a size field, so the | |
296 | * size is the distance between the base and the top of the stolen | |
297 | * memory. We also have the genuine case where base is zero and there's | |
298 | * nothing reserved. */ | |
299 | if (*base == 0) | |
300 | *size = 0; | |
301 | else | |
302 | *size = stolen_top - *base; | |
303 | } | |
304 | ||
3774eb50 PZ |
305 | static void gen6_get_stolen_reserved(struct drm_i915_private *dev_priv, |
306 | unsigned long *base, unsigned long *size) | |
307 | { | |
308 | uint32_t reg_val = I915_READ(GEN6_STOLEN_RESERVED); | |
309 | ||
310 | *base = reg_val & GEN6_STOLEN_RESERVED_ADDR_MASK; | |
311 | ||
312 | switch (reg_val & GEN6_STOLEN_RESERVED_SIZE_MASK) { | |
313 | case GEN6_STOLEN_RESERVED_1M: | |
314 | *size = 1024 * 1024; | |
315 | break; | |
316 | case GEN6_STOLEN_RESERVED_512K: | |
317 | *size = 512 * 1024; | |
318 | break; | |
319 | case GEN6_STOLEN_RESERVED_256K: | |
320 | *size = 256 * 1024; | |
321 | break; | |
322 | case GEN6_STOLEN_RESERVED_128K: | |
323 | *size = 128 * 1024; | |
324 | break; | |
325 | default: | |
326 | *size = 1024 * 1024; | |
327 | MISSING_CASE(reg_val & GEN6_STOLEN_RESERVED_SIZE_MASK); | |
328 | } | |
329 | } | |
330 | ||
331 | static void gen7_get_stolen_reserved(struct drm_i915_private *dev_priv, | |
332 | unsigned long *base, unsigned long *size) | |
333 | { | |
334 | uint32_t reg_val = I915_READ(GEN6_STOLEN_RESERVED); | |
335 | ||
336 | *base = reg_val & GEN7_STOLEN_RESERVED_ADDR_MASK; | |
337 | ||
338 | switch (reg_val & GEN7_STOLEN_RESERVED_SIZE_MASK) { | |
339 | case GEN7_STOLEN_RESERVED_1M: | |
340 | *size = 1024 * 1024; | |
341 | break; | |
342 | case GEN7_STOLEN_RESERVED_256K: | |
343 | *size = 256 * 1024; | |
344 | break; | |
345 | default: | |
346 | *size = 1024 * 1024; | |
347 | MISSING_CASE(reg_val & GEN7_STOLEN_RESERVED_SIZE_MASK); | |
348 | } | |
349 | } | |
350 | ||
351 | static void gen8_get_stolen_reserved(struct drm_i915_private *dev_priv, | |
352 | unsigned long *base, unsigned long *size) | |
353 | { | |
354 | uint32_t reg_val = I915_READ(GEN6_STOLEN_RESERVED); | |
355 | ||
356 | *base = reg_val & GEN6_STOLEN_RESERVED_ADDR_MASK; | |
357 | ||
358 | switch (reg_val & GEN8_STOLEN_RESERVED_SIZE_MASK) { | |
359 | case GEN8_STOLEN_RESERVED_1M: | |
360 | *size = 1024 * 1024; | |
361 | break; | |
362 | case GEN8_STOLEN_RESERVED_2M: | |
363 | *size = 2 * 1024 * 1024; | |
364 | break; | |
365 | case GEN8_STOLEN_RESERVED_4M: | |
366 | *size = 4 * 1024 * 1024; | |
367 | break; | |
368 | case GEN8_STOLEN_RESERVED_8M: | |
369 | *size = 8 * 1024 * 1024; | |
370 | break; | |
371 | default: | |
372 | *size = 8 * 1024 * 1024; | |
373 | MISSING_CASE(reg_val & GEN8_STOLEN_RESERVED_SIZE_MASK); | |
374 | } | |
375 | } | |
376 | ||
377 | static void bdw_get_stolen_reserved(struct drm_i915_private *dev_priv, | |
378 | unsigned long *base, unsigned long *size) | |
379 | { | |
72e96d64 | 380 | struct i915_ggtt *ggtt = &dev_priv->ggtt; |
3774eb50 PZ |
381 | uint32_t reg_val = I915_READ(GEN6_STOLEN_RESERVED); |
382 | unsigned long stolen_top; | |
383 | ||
72e96d64 | 384 | stolen_top = dev_priv->mm.stolen_base + ggtt->stolen_size; |
3774eb50 PZ |
385 | |
386 | *base = reg_val & GEN6_STOLEN_RESERVED_ADDR_MASK; | |
387 | ||
388 | /* On these platforms, the register doesn't have a size field, so the | |
389 | * size is the distance between the base and the top of the stolen | |
390 | * memory. We also have the genuine case where base is zero and there's | |
391 | * nothing reserved. */ | |
392 | if (*base == 0) | |
393 | *size = 0; | |
394 | else | |
395 | *size = stolen_top - *base; | |
396 | } | |
397 | ||
9797fbfb CW |
398 | int i915_gem_init_stolen(struct drm_device *dev) |
399 | { | |
72e96d64 JL |
400 | struct drm_i915_private *dev_priv = to_i915(dev); |
401 | struct i915_ggtt *ggtt = &dev_priv->ggtt; | |
d7884d69 | 402 | unsigned long reserved_total, reserved_base = 0, reserved_size; |
3774eb50 | 403 | unsigned long stolen_top; |
9797fbfb | 404 | |
92e97d2f PZ |
405 | mutex_init(&dev_priv->mm.stolen_lock); |
406 | ||
0f4706d2 | 407 | #ifdef CONFIG_INTEL_IOMMU |
fcc9fe1a | 408 | if (intel_iommu_gfx_mapped && INTEL_INFO(dev)->gen < 8) { |
0f4706d2 CW |
409 | DRM_INFO("DMAR active, disabling use of stolen memory\n"); |
410 | return 0; | |
411 | } | |
412 | #endif | |
413 | ||
72e96d64 | 414 | if (ggtt->stolen_size == 0) |
6644a4e9 CW |
415 | return 0; |
416 | ||
e12a2d53 CW |
417 | dev_priv->mm.stolen_base = i915_stolen_to_physical(dev); |
418 | if (dev_priv->mm.stolen_base == 0) | |
419 | return 0; | |
420 | ||
72e96d64 | 421 | stolen_top = dev_priv->mm.stolen_base + ggtt->stolen_size; |
3774eb50 PZ |
422 | |
423 | switch (INTEL_INFO(dev_priv)->gen) { | |
424 | case 2: | |
425 | case 3: | |
7d316aec | 426 | break; |
3774eb50 | 427 | case 4: |
7d316aec VS |
428 | if (IS_G4X(dev)) |
429 | g4x_get_stolen_reserved(dev_priv, &reserved_base, | |
430 | &reserved_size); | |
431 | break; | |
3774eb50 PZ |
432 | case 5: |
433 | /* Assume the gen6 maximum for the older platforms. */ | |
434 | reserved_size = 1024 * 1024; | |
435 | reserved_base = stolen_top - reserved_size; | |
436 | break; | |
437 | case 6: | |
438 | gen6_get_stolen_reserved(dev_priv, &reserved_base, | |
439 | &reserved_size); | |
440 | break; | |
441 | case 7: | |
442 | gen7_get_stolen_reserved(dev_priv, &reserved_base, | |
443 | &reserved_size); | |
444 | break; | |
445 | default: | |
ef11bdb3 RV |
446 | if (IS_BROADWELL(dev_priv) || |
447 | IS_SKYLAKE(dev_priv) || IS_KABYLAKE(dev)) | |
3774eb50 PZ |
448 | bdw_get_stolen_reserved(dev_priv, &reserved_base, |
449 | &reserved_size); | |
450 | else | |
451 | gen8_get_stolen_reserved(dev_priv, &reserved_base, | |
452 | &reserved_size); | |
453 | break; | |
454 | } | |
455 | ||
456 | /* It is possible for the reserved base to be zero, but the register | |
457 | * field for size doesn't have a zero option. */ | |
458 | if (reserved_base == 0) { | |
459 | reserved_size = 0; | |
460 | reserved_base = stolen_top; | |
40bae736 | 461 | } |
c9cddffc | 462 | |
3774eb50 PZ |
463 | if (reserved_base < dev_priv->mm.stolen_base || |
464 | reserved_base + reserved_size > stolen_top) { | |
465 | DRM_DEBUG_KMS("Stolen reserved area [0x%08lx - 0x%08lx] outside stolen memory [0x%08lx - 0x%08lx]\n", | |
466 | reserved_base, reserved_base + reserved_size, | |
467 | dev_priv->mm.stolen_base, stolen_top); | |
897f9ed0 | 468 | return 0; |
3774eb50 PZ |
469 | } |
470 | ||
72e96d64 JL |
471 | ggtt->stolen_reserved_base = reserved_base; |
472 | ggtt->stolen_reserved_size = reserved_size; | |
274008e8 | 473 | |
3774eb50 PZ |
474 | /* It is possible for the reserved area to end before the end of stolen |
475 | * memory, so just consider the start. */ | |
476 | reserved_total = stolen_top - reserved_base; | |
477 | ||
8e9d597a | 478 | DRM_DEBUG_KMS("Memory reserved for graphics device: %zuK, usable: %luK\n", |
72e96d64 JL |
479 | ggtt->stolen_size >> 10, |
480 | (ggtt->stolen_size - reserved_total) >> 10); | |
897f9ed0 | 481 | |
72e96d64 | 482 | ggtt->stolen_usable_size = ggtt->stolen_size - reserved_total; |
a9da512b | 483 | |
1ca36d4c PZ |
484 | /* |
485 | * Basic memrange allocator for stolen space. | |
486 | * | |
487 | * TODO: Notice that some platforms require us to not use the first page | |
488 | * of the stolen memory but their BIOSes may still put the framebuffer | |
489 | * on the first page. So we don't reserve this page for now because of | |
490 | * that. Our current solution is to just prevent new nodes from being | |
491 | * inserted on the first page - see the check we have at | |
492 | * i915_gem_stolen_insert_node_in_range(). We may want to fix the fbcon | |
493 | * problem later. | |
494 | */ | |
72e96d64 | 495 | drm_mm_init(&dev_priv->mm.stolen, 0, ggtt->stolen_usable_size); |
9797fbfb CW |
496 | |
497 | return 0; | |
498 | } | |
0104fdbb CW |
499 | |
500 | static struct sg_table * | |
501 | i915_pages_create_for_stolen(struct drm_device *dev, | |
502 | u32 offset, u32 size) | |
503 | { | |
72e96d64 JL |
504 | struct drm_i915_private *dev_priv = to_i915(dev); |
505 | struct i915_ggtt *ggtt = &dev_priv->ggtt; | |
0104fdbb CW |
506 | struct sg_table *st; |
507 | struct scatterlist *sg; | |
508 | ||
509 | DRM_DEBUG_DRIVER("offset=0x%x, size=%d\n", offset, size); | |
72e96d64 | 510 | BUG_ON(offset > ggtt->stolen_size - size); |
0104fdbb CW |
511 | |
512 | /* We hide that we have no struct page backing our stolen object | |
513 | * by wrapping the contiguous physical allocation with a fake | |
514 | * dma mapping in a single scatterlist. | |
515 | */ | |
516 | ||
517 | st = kmalloc(sizeof(*st), GFP_KERNEL); | |
518 | if (st == NULL) | |
519 | return NULL; | |
520 | ||
521 | if (sg_alloc_table(st, 1, GFP_KERNEL)) { | |
522 | kfree(st); | |
523 | return NULL; | |
524 | } | |
525 | ||
526 | sg = st->sgl; | |
ec14ba47 | 527 | sg->offset = 0; |
ed23abdd | 528 | sg->length = size; |
0104fdbb CW |
529 | |
530 | sg_dma_address(sg) = (dma_addr_t)dev_priv->mm.stolen_base + offset; | |
531 | sg_dma_len(sg) = size; | |
532 | ||
533 | return st; | |
534 | } | |
535 | ||
536 | static int i915_gem_object_get_pages_stolen(struct drm_i915_gem_object *obj) | |
537 | { | |
538 | BUG(); | |
539 | return -EINVAL; | |
540 | } | |
541 | ||
542 | static void i915_gem_object_put_pages_stolen(struct drm_i915_gem_object *obj) | |
543 | { | |
544 | /* Should only be called during free */ | |
545 | sg_free_table(obj->pages); | |
546 | kfree(obj->pages); | |
547 | } | |
548 | ||
ef0cf27c CW |
549 | |
550 | static void | |
551 | i915_gem_object_release_stolen(struct drm_i915_gem_object *obj) | |
552 | { | |
fac5e23e | 553 | struct drm_i915_private *dev_priv = to_i915(obj->base.dev); |
d713fd49 | 554 | |
ef0cf27c | 555 | if (obj->stolen) { |
d713fd49 | 556 | i915_gem_stolen_remove_node(dev_priv, obj->stolen); |
ef0cf27c CW |
557 | kfree(obj->stolen); |
558 | obj->stolen = NULL; | |
559 | } | |
560 | } | |
0104fdbb CW |
561 | static const struct drm_i915_gem_object_ops i915_gem_object_stolen_ops = { |
562 | .get_pages = i915_gem_object_get_pages_stolen, | |
563 | .put_pages = i915_gem_object_put_pages_stolen, | |
ef0cf27c | 564 | .release = i915_gem_object_release_stolen, |
0104fdbb CW |
565 | }; |
566 | ||
567 | static struct drm_i915_gem_object * | |
568 | _i915_gem_object_create_stolen(struct drm_device *dev, | |
569 | struct drm_mm_node *stolen) | |
570 | { | |
571 | struct drm_i915_gem_object *obj; | |
572 | ||
42dcedd4 | 573 | obj = i915_gem_object_alloc(dev); |
0104fdbb CW |
574 | if (obj == NULL) |
575 | return NULL; | |
576 | ||
89c8233f | 577 | drm_gem_private_object_init(dev, &obj->base, stolen->size); |
0104fdbb CW |
578 | i915_gem_object_init(obj, &i915_gem_object_stolen_ops); |
579 | ||
580 | obj->pages = i915_pages_create_for_stolen(dev, | |
581 | stolen->start, stolen->size); | |
582 | if (obj->pages == NULL) | |
583 | goto cleanup; | |
584 | ||
c5236470 AS |
585 | obj->get_page.sg = obj->pages->sgl; |
586 | obj->get_page.last = 0; | |
587 | ||
dd53e1b0 | 588 | i915_gem_object_pin_pages(obj); |
0104fdbb CW |
589 | obj->stolen = stolen; |
590 | ||
d46f1c3f CW |
591 | obj->base.read_domains = I915_GEM_DOMAIN_CPU | I915_GEM_DOMAIN_GTT; |
592 | obj->cache_level = HAS_LLC(dev) ? I915_CACHE_LLC : I915_CACHE_NONE; | |
0104fdbb CW |
593 | |
594 | return obj; | |
595 | ||
596 | cleanup: | |
42dcedd4 | 597 | i915_gem_object_free(obj); |
0104fdbb CW |
598 | return NULL; |
599 | } | |
600 | ||
601 | struct drm_i915_gem_object * | |
602 | i915_gem_object_create_stolen(struct drm_device *dev, u32 size) | |
603 | { | |
fac5e23e | 604 | struct drm_i915_private *dev_priv = to_i915(dev); |
0104fdbb CW |
605 | struct drm_i915_gem_object *obj; |
606 | struct drm_mm_node *stolen; | |
06e78edf | 607 | int ret; |
0104fdbb | 608 | |
446f8d81 | 609 | if (!drm_mm_initialized(&dev_priv->mm.stolen)) |
0104fdbb CW |
610 | return NULL; |
611 | ||
612 | DRM_DEBUG_KMS("creating stolen object: size=%x\n", size); | |
613 | if (size == 0) | |
614 | return NULL; | |
615 | ||
06e78edf DH |
616 | stolen = kzalloc(sizeof(*stolen), GFP_KERNEL); |
617 | if (!stolen) | |
0104fdbb CW |
618 | return NULL; |
619 | ||
d713fd49 | 620 | ret = i915_gem_stolen_insert_node(dev_priv, stolen, size, 4096); |
06e78edf DH |
621 | if (ret) { |
622 | kfree(stolen); | |
623 | return NULL; | |
624 | } | |
625 | ||
0104fdbb CW |
626 | obj = _i915_gem_object_create_stolen(dev, stolen); |
627 | if (obj) | |
628 | return obj; | |
629 | ||
d713fd49 | 630 | i915_gem_stolen_remove_node(dev_priv, stolen); |
06e78edf | 631 | kfree(stolen); |
0104fdbb CW |
632 | return NULL; |
633 | } | |
634 | ||
866d12b4 CW |
635 | struct drm_i915_gem_object * |
636 | i915_gem_object_create_stolen_for_preallocated(struct drm_device *dev, | |
637 | u32 stolen_offset, | |
638 | u32 gtt_offset, | |
639 | u32 size) | |
640 | { | |
72e96d64 JL |
641 | struct drm_i915_private *dev_priv = to_i915(dev); |
642 | struct i915_ggtt *ggtt = &dev_priv->ggtt; | |
866d12b4 CW |
643 | struct drm_i915_gem_object *obj; |
644 | struct drm_mm_node *stolen; | |
2f633156 | 645 | struct i915_vma *vma; |
b3a070cc | 646 | int ret; |
866d12b4 | 647 | |
446f8d81 | 648 | if (!drm_mm_initialized(&dev_priv->mm.stolen)) |
866d12b4 CW |
649 | return NULL; |
650 | ||
12c83d99 TU |
651 | lockdep_assert_held(&dev->struct_mutex); |
652 | ||
866d12b4 CW |
653 | DRM_DEBUG_KMS("creating preallocated stolen object: stolen_offset=%x, gtt_offset=%x, size=%x\n", |
654 | stolen_offset, gtt_offset, size); | |
655 | ||
656 | /* KISS and expect everything to be page-aligned */ | |
f37b5c2b DV |
657 | if (WARN_ON(size == 0) || WARN_ON(size & 4095) || |
658 | WARN_ON(stolen_offset & 4095)) | |
866d12b4 CW |
659 | return NULL; |
660 | ||
b3a070cc BW |
661 | stolen = kzalloc(sizeof(*stolen), GFP_KERNEL); |
662 | if (!stolen) | |
663 | return NULL; | |
664 | ||
338710e7 BW |
665 | stolen->start = stolen_offset; |
666 | stolen->size = size; | |
92e97d2f | 667 | mutex_lock(&dev_priv->mm.stolen_lock); |
338710e7 | 668 | ret = drm_mm_reserve_node(&dev_priv->mm.stolen, stolen); |
92e97d2f | 669 | mutex_unlock(&dev_priv->mm.stolen_lock); |
b3a070cc | 670 | if (ret) { |
866d12b4 | 671 | DRM_DEBUG_KMS("failed to allocate stolen space\n"); |
b3a070cc | 672 | kfree(stolen); |
866d12b4 CW |
673 | return NULL; |
674 | } | |
675 | ||
676 | obj = _i915_gem_object_create_stolen(dev, stolen); | |
677 | if (obj == NULL) { | |
678 | DRM_DEBUG_KMS("failed to allocate stolen object\n"); | |
d713fd49 | 679 | i915_gem_stolen_remove_node(dev_priv, stolen); |
06e78edf | 680 | kfree(stolen); |
866d12b4 CW |
681 | return NULL; |
682 | } | |
683 | ||
3727d55e | 684 | /* Some objects just need physical mem from stolen space */ |
190d6cd5 | 685 | if (gtt_offset == I915_GTT_OFFSET_NONE) |
3727d55e JB |
686 | return obj; |
687 | ||
72e96d64 | 688 | vma = i915_gem_obj_lookup_or_create_vma(obj, &ggtt->base); |
db473b36 DC |
689 | if (IS_ERR(vma)) { |
690 | ret = PTR_ERR(vma); | |
7c4a7d60 | 691 | goto err; |
2f633156 BW |
692 | } |
693 | ||
866d12b4 CW |
694 | /* To simplify the initialisation sequence between KMS and GTT, |
695 | * we allow construction of the stolen object prior to | |
696 | * setting up the GTT space. The actual reservation will occur | |
697 | * later. | |
698 | */ | |
2f633156 BW |
699 | vma->node.start = gtt_offset; |
700 | vma->node.size = size; | |
72e96d64 JL |
701 | if (drm_mm_initialized(&ggtt->base.mm)) { |
702 | ret = drm_mm_reserve_node(&ggtt->base.mm, &vma->node); | |
b3a070cc | 703 | if (ret) { |
866d12b4 | 704 | DRM_DEBUG_KMS("failed to allocate stolen GTT space\n"); |
7c4a7d60 | 705 | goto err; |
866d12b4 | 706 | } |
866d12b4 | 707 | |
7c4a7d60 | 708 | vma->bound |= GLOBAL_BIND; |
d0710abb | 709 | __i915_vma_set_map_and_fenceable(vma); |
72e96d64 | 710 | list_add_tail(&vma->vm_link, &ggtt->base.inactive_list); |
7c4a7d60 | 711 | } |
866d12b4 | 712 | |
35c20a60 | 713 | list_add_tail(&obj->global_list, &dev_priv->mm.bound_list); |
d8ccba86 | 714 | i915_gem_object_pin_pages(obj); |
866d12b4 CW |
715 | |
716 | return obj; | |
b3a070cc | 717 | |
7c4a7d60 | 718 | err: |
b3a070cc BW |
719 | drm_gem_object_unreference(&obj->base); |
720 | return NULL; | |
866d12b4 | 721 | } |