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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 | 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 | 94 | struct drm_i915_private *dev_priv = to_i915(dev); |
52a05c30 | 95 | struct pci_dev *pdev = dev_priv->drm.pdev; |
72e96d64 | 96 | struct i915_ggtt *ggtt = &dev_priv->ggtt; |
eaba1b8f | 97 | struct resource *r; |
9797fbfb CW |
98 | u32 base; |
99 | ||
17fec8a0 | 100 | /* Almost universally we can find the Graphics Base of Stolen Memory |
e10fa551 JL |
101 | * at register BSM (0x5c) in the igfx configuration space. On a few |
102 | * (desktop) machines this is also mirrored in the bridge device at | |
103 | * different locations, or in the MCHBAR. | |
0ad98c74 VS |
104 | * |
105 | * On 865 we just check the TOUD register. | |
106 | * | |
107 | * On 830/845/85x the stolen memory base isn't available in any | |
108 | * register. We need to calculate it as TOM-TSEG_SIZE-stolen_size. | |
e12a2d53 | 109 | * |
9797fbfb | 110 | */ |
e12a2d53 | 111 | base = 0; |
17fec8a0 | 112 | if (INTEL_INFO(dev)->gen >= 3) { |
e10fa551 JL |
113 | u32 bsm; |
114 | ||
52a05c30 | 115 | pci_read_config_dword(pdev, INTEL_BSM, &bsm); |
e10fa551 | 116 | |
c0dd3460 | 117 | base = bsm & INTEL_BSM_MASK; |
0ad98c74 | 118 | } else if (IS_I865G(dev)) { |
d721b02f | 119 | u32 tseg_size = 0; |
0ad98c74 | 120 | u16 toud = 0; |
d721b02f VS |
121 | u8 tmp; |
122 | ||
52a05c30 | 123 | pci_bus_read_config_byte(pdev->bus, PCI_DEVFN(0, 0), |
d721b02f VS |
124 | I845_ESMRAMC, &tmp); |
125 | ||
126 | if (tmp & TSEG_ENABLE) { | |
127 | switch (tmp & I845_TSEG_SIZE_MASK) { | |
128 | case I845_TSEG_SIZE_512K: | |
129 | tseg_size = KB(512); | |
130 | break; | |
131 | case I845_TSEG_SIZE_1M: | |
132 | tseg_size = MB(1); | |
133 | break; | |
134 | } | |
135 | } | |
0ad98c74 | 136 | |
52a05c30 | 137 | pci_bus_read_config_word(pdev->bus, PCI_DEVFN(0, 0), |
0ad98c74 VS |
138 | I865_TOUD, &toud); |
139 | ||
d721b02f | 140 | base = (toud << 16) + tseg_size; |
0ad98c74 VS |
141 | } else if (IS_I85X(dev)) { |
142 | u32 tseg_size = 0; | |
143 | u32 tom; | |
144 | u8 tmp; | |
145 | ||
52a05c30 | 146 | pci_bus_read_config_byte(pdev->bus, PCI_DEVFN(0, 0), |
0ad98c74 VS |
147 | I85X_ESMRAMC, &tmp); |
148 | ||
149 | if (tmp & TSEG_ENABLE) | |
150 | tseg_size = MB(1); | |
151 | ||
52a05c30 | 152 | pci_bus_read_config_byte(pdev->bus, PCI_DEVFN(0, 1), |
0ad98c74 VS |
153 | I85X_DRB3, &tmp); |
154 | tom = tmp * MB(32); | |
155 | ||
72e96d64 | 156 | base = tom - tseg_size - ggtt->stolen_size; |
0ad98c74 VS |
157 | } else if (IS_845G(dev)) { |
158 | u32 tseg_size = 0; | |
159 | u32 tom; | |
160 | u8 tmp; | |
161 | ||
52a05c30 | 162 | pci_bus_read_config_byte(pdev->bus, PCI_DEVFN(0, 0), |
0ad98c74 VS |
163 | I845_ESMRAMC, &tmp); |
164 | ||
165 | if (tmp & TSEG_ENABLE) { | |
166 | switch (tmp & I845_TSEG_SIZE_MASK) { | |
167 | case I845_TSEG_SIZE_512K: | |
168 | tseg_size = KB(512); | |
169 | break; | |
170 | case I845_TSEG_SIZE_1M: | |
171 | tseg_size = MB(1); | |
172 | break; | |
173 | } | |
174 | } | |
175 | ||
52a05c30 | 176 | pci_bus_read_config_byte(pdev->bus, PCI_DEVFN(0, 0), |
0ad98c74 VS |
177 | I830_DRB3, &tmp); |
178 | tom = tmp * MB(32); | |
179 | ||
72e96d64 | 180 | base = tom - tseg_size - ggtt->stolen_size; |
0ad98c74 VS |
181 | } else if (IS_I830(dev)) { |
182 | u32 tseg_size = 0; | |
183 | u32 tom; | |
184 | u8 tmp; | |
185 | ||
52a05c30 | 186 | pci_bus_read_config_byte(pdev->bus, PCI_DEVFN(0, 0), |
0ad98c74 VS |
187 | I830_ESMRAMC, &tmp); |
188 | ||
189 | if (tmp & TSEG_ENABLE) { | |
190 | if (tmp & I830_TSEG_SIZE_1M) | |
191 | tseg_size = MB(1); | |
192 | else | |
193 | tseg_size = KB(512); | |
194 | } | |
195 | ||
52a05c30 | 196 | pci_bus_read_config_byte(pdev->bus, PCI_DEVFN(0, 0), |
0ad98c74 VS |
197 | I830_DRB3, &tmp); |
198 | tom = tmp * MB(32); | |
199 | ||
72e96d64 | 200 | base = tom - tseg_size - ggtt->stolen_size; |
e12a2d53 | 201 | } |
9797fbfb | 202 | |
eaba1b8f CW |
203 | if (base == 0) |
204 | return 0; | |
205 | ||
f1e1c212 VS |
206 | /* make sure we don't clobber the GTT if it's within stolen memory */ |
207 | if (INTEL_INFO(dev)->gen <= 4 && !IS_G33(dev) && !IS_G4X(dev)) { | |
208 | struct { | |
209 | u32 start, end; | |
210 | } stolen[2] = { | |
72e96d64 JL |
211 | { .start = base, .end = base + ggtt->stolen_size, }, |
212 | { .start = base, .end = base + ggtt->stolen_size, }, | |
f1e1c212 | 213 | }; |
72e96d64 | 214 | u64 ggtt_start, ggtt_end; |
f1e1c212 | 215 | |
72e96d64 | 216 | ggtt_start = I915_READ(PGTBL_CTL); |
f1e1c212 | 217 | if (IS_GEN4(dev)) |
72e96d64 JL |
218 | ggtt_start = (ggtt_start & PGTBL_ADDRESS_LO_MASK) | |
219 | (ggtt_start & PGTBL_ADDRESS_HI_MASK) << 28; | |
f1e1c212 | 220 | else |
72e96d64 JL |
221 | ggtt_start &= PGTBL_ADDRESS_LO_MASK; |
222 | ggtt_end = ggtt_start + ggtt_total_entries(ggtt) * 4; | |
f1e1c212 | 223 | |
72e96d64 JL |
224 | if (ggtt_start >= stolen[0].start && ggtt_start < stolen[0].end) |
225 | stolen[0].end = ggtt_start; | |
226 | if (ggtt_end > stolen[1].start && ggtt_end <= stolen[1].end) | |
227 | stolen[1].start = ggtt_end; | |
f1e1c212 VS |
228 | |
229 | /* pick the larger of the two chunks */ | |
230 | if (stolen[0].end - stolen[0].start > | |
231 | stolen[1].end - stolen[1].start) { | |
232 | base = stolen[0].start; | |
72e96d64 | 233 | ggtt->stolen_size = stolen[0].end - stolen[0].start; |
f1e1c212 VS |
234 | } else { |
235 | base = stolen[1].start; | |
72e96d64 | 236 | ggtt->stolen_size = stolen[1].end - stolen[1].start; |
f1e1c212 VS |
237 | } |
238 | ||
239 | if (stolen[0].start != stolen[1].start || | |
240 | stolen[0].end != stolen[1].end) { | |
241 | DRM_DEBUG_KMS("GTT within stolen memory at 0x%llx-0x%llx\n", | |
72e96d64 JL |
242 | (unsigned long long)ggtt_start, |
243 | (unsigned long long)ggtt_end - 1); | |
f1e1c212 | 244 | DRM_DEBUG_KMS("Stolen memory adjusted to 0x%x-0x%x\n", |
72e96d64 | 245 | base, base + (u32)ggtt->stolen_size - 1); |
f1e1c212 VS |
246 | } |
247 | } | |
248 | ||
249 | ||
eaba1b8f CW |
250 | /* Verify that nothing else uses this physical address. Stolen |
251 | * memory should be reserved by the BIOS and hidden from the | |
252 | * kernel. So if the region is already marked as busy, something | |
253 | * is seriously wrong. | |
254 | */ | |
72e96d64 | 255 | r = devm_request_mem_region(dev->dev, base, ggtt->stolen_size, |
eaba1b8f CW |
256 | "Graphics Stolen Memory"); |
257 | if (r == NULL) { | |
3617dc96 AG |
258 | /* |
259 | * One more attempt but this time requesting region from | |
260 | * base + 1, as we have seen that this resolves the region | |
261 | * conflict with the PCI Bus. | |
262 | * This is a BIOS w/a: Some BIOS wrap stolen in the root | |
263 | * PCI bus, but have an off-by-one error. Hence retry the | |
264 | * reservation starting from 1 instead of 0. | |
265 | */ | |
266 | r = devm_request_mem_region(dev->dev, base + 1, | |
72e96d64 | 267 | ggtt->stolen_size - 1, |
3617dc96 | 268 | "Graphics Stolen Memory"); |
0b6d24c0 DV |
269 | /* |
270 | * GEN3 firmware likes to smash pci bridges into the stolen | |
271 | * range. Apparently this works. | |
272 | */ | |
273 | if (r == NULL && !IS_GEN3(dev)) { | |
3617dc96 | 274 | DRM_ERROR("conflict detected with stolen region: [0x%08x - 0x%08x]\n", |
72e96d64 | 275 | base, base + (uint32_t)ggtt->stolen_size); |
3617dc96 AG |
276 | base = 0; |
277 | } | |
eaba1b8f CW |
278 | } |
279 | ||
e12a2d53 | 280 | return base; |
9797fbfb CW |
281 | } |
282 | ||
9797fbfb CW |
283 | void i915_gem_cleanup_stolen(struct drm_device *dev) |
284 | { | |
fac5e23e | 285 | struct drm_i915_private *dev_priv = to_i915(dev); |
4d7bb011 | 286 | |
446f8d81 DV |
287 | if (!drm_mm_initialized(&dev_priv->mm.stolen)) |
288 | return; | |
289 | ||
4d7bb011 | 290 | drm_mm_takedown(&dev_priv->mm.stolen); |
9797fbfb CW |
291 | } |
292 | ||
7d316aec VS |
293 | static void g4x_get_stolen_reserved(struct drm_i915_private *dev_priv, |
294 | unsigned long *base, unsigned long *size) | |
295 | { | |
72e96d64 | 296 | struct i915_ggtt *ggtt = &dev_priv->ggtt; |
7d316aec VS |
297 | uint32_t reg_val = I915_READ(IS_GM45(dev_priv) ? |
298 | CTG_STOLEN_RESERVED : | |
299 | ELK_STOLEN_RESERVED); | |
300 | unsigned long stolen_top = dev_priv->mm.stolen_base + | |
72e96d64 | 301 | ggtt->stolen_size; |
7d316aec VS |
302 | |
303 | *base = (reg_val & G4X_STOLEN_RESERVED_ADDR2_MASK) << 16; | |
304 | ||
305 | WARN_ON((reg_val & G4X_STOLEN_RESERVED_ADDR1_MASK) < *base); | |
306 | ||
307 | /* On these platforms, the register doesn't have a size field, so the | |
308 | * size is the distance between the base and the top of the stolen | |
309 | * memory. We also have the genuine case where base is zero and there's | |
310 | * nothing reserved. */ | |
311 | if (*base == 0) | |
312 | *size = 0; | |
313 | else | |
314 | *size = stolen_top - *base; | |
315 | } | |
316 | ||
3774eb50 PZ |
317 | static void gen6_get_stolen_reserved(struct drm_i915_private *dev_priv, |
318 | unsigned long *base, unsigned long *size) | |
319 | { | |
320 | uint32_t reg_val = I915_READ(GEN6_STOLEN_RESERVED); | |
321 | ||
322 | *base = reg_val & GEN6_STOLEN_RESERVED_ADDR_MASK; | |
323 | ||
324 | switch (reg_val & GEN6_STOLEN_RESERVED_SIZE_MASK) { | |
325 | case GEN6_STOLEN_RESERVED_1M: | |
326 | *size = 1024 * 1024; | |
327 | break; | |
328 | case GEN6_STOLEN_RESERVED_512K: | |
329 | *size = 512 * 1024; | |
330 | break; | |
331 | case GEN6_STOLEN_RESERVED_256K: | |
332 | *size = 256 * 1024; | |
333 | break; | |
334 | case GEN6_STOLEN_RESERVED_128K: | |
335 | *size = 128 * 1024; | |
336 | break; | |
337 | default: | |
338 | *size = 1024 * 1024; | |
339 | MISSING_CASE(reg_val & GEN6_STOLEN_RESERVED_SIZE_MASK); | |
340 | } | |
341 | } | |
342 | ||
343 | static void gen7_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 & GEN7_STOLEN_RESERVED_ADDR_MASK; | |
349 | ||
350 | switch (reg_val & GEN7_STOLEN_RESERVED_SIZE_MASK) { | |
351 | case GEN7_STOLEN_RESERVED_1M: | |
352 | *size = 1024 * 1024; | |
353 | break; | |
354 | case GEN7_STOLEN_RESERVED_256K: | |
355 | *size = 256 * 1024; | |
356 | break; | |
357 | default: | |
358 | *size = 1024 * 1024; | |
359 | MISSING_CASE(reg_val & GEN7_STOLEN_RESERVED_SIZE_MASK); | |
360 | } | |
361 | } | |
362 | ||
363 | static void gen8_get_stolen_reserved(struct drm_i915_private *dev_priv, | |
364 | unsigned long *base, unsigned long *size) | |
365 | { | |
366 | uint32_t reg_val = I915_READ(GEN6_STOLEN_RESERVED); | |
367 | ||
368 | *base = reg_val & GEN6_STOLEN_RESERVED_ADDR_MASK; | |
369 | ||
370 | switch (reg_val & GEN8_STOLEN_RESERVED_SIZE_MASK) { | |
371 | case GEN8_STOLEN_RESERVED_1M: | |
372 | *size = 1024 * 1024; | |
373 | break; | |
374 | case GEN8_STOLEN_RESERVED_2M: | |
375 | *size = 2 * 1024 * 1024; | |
376 | break; | |
377 | case GEN8_STOLEN_RESERVED_4M: | |
378 | *size = 4 * 1024 * 1024; | |
379 | break; | |
380 | case GEN8_STOLEN_RESERVED_8M: | |
381 | *size = 8 * 1024 * 1024; | |
382 | break; | |
383 | default: | |
384 | *size = 8 * 1024 * 1024; | |
385 | MISSING_CASE(reg_val & GEN8_STOLEN_RESERVED_SIZE_MASK); | |
386 | } | |
387 | } | |
388 | ||
389 | static void bdw_get_stolen_reserved(struct drm_i915_private *dev_priv, | |
390 | unsigned long *base, unsigned long *size) | |
391 | { | |
72e96d64 | 392 | struct i915_ggtt *ggtt = &dev_priv->ggtt; |
3774eb50 PZ |
393 | uint32_t reg_val = I915_READ(GEN6_STOLEN_RESERVED); |
394 | unsigned long stolen_top; | |
395 | ||
72e96d64 | 396 | stolen_top = dev_priv->mm.stolen_base + ggtt->stolen_size; |
3774eb50 PZ |
397 | |
398 | *base = reg_val & GEN6_STOLEN_RESERVED_ADDR_MASK; | |
399 | ||
400 | /* On these platforms, the register doesn't have a size field, so the | |
401 | * size is the distance between the base and the top of the stolen | |
402 | * memory. We also have the genuine case where base is zero and there's | |
403 | * nothing reserved. */ | |
404 | if (*base == 0) | |
405 | *size = 0; | |
406 | else | |
407 | *size = stolen_top - *base; | |
408 | } | |
409 | ||
9797fbfb CW |
410 | int i915_gem_init_stolen(struct drm_device *dev) |
411 | { | |
72e96d64 JL |
412 | struct drm_i915_private *dev_priv = to_i915(dev); |
413 | struct i915_ggtt *ggtt = &dev_priv->ggtt; | |
d7884d69 | 414 | unsigned long reserved_total, reserved_base = 0, reserved_size; |
3774eb50 | 415 | unsigned long stolen_top; |
9797fbfb | 416 | |
92e97d2f PZ |
417 | mutex_init(&dev_priv->mm.stolen_lock); |
418 | ||
0f4706d2 | 419 | #ifdef CONFIG_INTEL_IOMMU |
fcc9fe1a | 420 | if (intel_iommu_gfx_mapped && INTEL_INFO(dev)->gen < 8) { |
0f4706d2 CW |
421 | DRM_INFO("DMAR active, disabling use of stolen memory\n"); |
422 | return 0; | |
423 | } | |
424 | #endif | |
425 | ||
72e96d64 | 426 | if (ggtt->stolen_size == 0) |
6644a4e9 CW |
427 | return 0; |
428 | ||
e12a2d53 CW |
429 | dev_priv->mm.stolen_base = i915_stolen_to_physical(dev); |
430 | if (dev_priv->mm.stolen_base == 0) | |
431 | return 0; | |
432 | ||
72e96d64 | 433 | stolen_top = dev_priv->mm.stolen_base + ggtt->stolen_size; |
3774eb50 PZ |
434 | |
435 | switch (INTEL_INFO(dev_priv)->gen) { | |
436 | case 2: | |
437 | case 3: | |
7d316aec | 438 | break; |
3774eb50 | 439 | case 4: |
7d316aec VS |
440 | if (IS_G4X(dev)) |
441 | g4x_get_stolen_reserved(dev_priv, &reserved_base, | |
442 | &reserved_size); | |
443 | break; | |
3774eb50 PZ |
444 | case 5: |
445 | /* Assume the gen6 maximum for the older platforms. */ | |
446 | reserved_size = 1024 * 1024; | |
447 | reserved_base = stolen_top - reserved_size; | |
448 | break; | |
449 | case 6: | |
450 | gen6_get_stolen_reserved(dev_priv, &reserved_base, | |
451 | &reserved_size); | |
452 | break; | |
453 | case 7: | |
454 | gen7_get_stolen_reserved(dev_priv, &reserved_base, | |
455 | &reserved_size); | |
456 | break; | |
457 | default: | |
ef11bdb3 RV |
458 | if (IS_BROADWELL(dev_priv) || |
459 | IS_SKYLAKE(dev_priv) || IS_KABYLAKE(dev)) | |
3774eb50 PZ |
460 | bdw_get_stolen_reserved(dev_priv, &reserved_base, |
461 | &reserved_size); | |
462 | else | |
463 | gen8_get_stolen_reserved(dev_priv, &reserved_base, | |
464 | &reserved_size); | |
465 | break; | |
466 | } | |
467 | ||
468 | /* It is possible for the reserved base to be zero, but the register | |
469 | * field for size doesn't have a zero option. */ | |
470 | if (reserved_base == 0) { | |
471 | reserved_size = 0; | |
472 | reserved_base = stolen_top; | |
40bae736 | 473 | } |
c9cddffc | 474 | |
3774eb50 PZ |
475 | if (reserved_base < dev_priv->mm.stolen_base || |
476 | reserved_base + reserved_size > stolen_top) { | |
477 | DRM_DEBUG_KMS("Stolen reserved area [0x%08lx - 0x%08lx] outside stolen memory [0x%08lx - 0x%08lx]\n", | |
478 | reserved_base, reserved_base + reserved_size, | |
479 | dev_priv->mm.stolen_base, stolen_top); | |
897f9ed0 | 480 | return 0; |
3774eb50 PZ |
481 | } |
482 | ||
72e96d64 JL |
483 | ggtt->stolen_reserved_base = reserved_base; |
484 | ggtt->stolen_reserved_size = reserved_size; | |
274008e8 | 485 | |
3774eb50 PZ |
486 | /* It is possible for the reserved area to end before the end of stolen |
487 | * memory, so just consider the start. */ | |
488 | reserved_total = stolen_top - reserved_base; | |
489 | ||
8e9d597a | 490 | DRM_DEBUG_KMS("Memory reserved for graphics device: %zuK, usable: %luK\n", |
72e96d64 JL |
491 | ggtt->stolen_size >> 10, |
492 | (ggtt->stolen_size - reserved_total) >> 10); | |
897f9ed0 | 493 | |
72e96d64 | 494 | ggtt->stolen_usable_size = ggtt->stolen_size - reserved_total; |
a9da512b | 495 | |
1ca36d4c PZ |
496 | /* |
497 | * Basic memrange allocator for stolen space. | |
498 | * | |
499 | * TODO: Notice that some platforms require us to not use the first page | |
500 | * of the stolen memory but their BIOSes may still put the framebuffer | |
501 | * on the first page. So we don't reserve this page for now because of | |
502 | * that. Our current solution is to just prevent new nodes from being | |
503 | * inserted on the first page - see the check we have at | |
504 | * i915_gem_stolen_insert_node_in_range(). We may want to fix the fbcon | |
505 | * problem later. | |
506 | */ | |
72e96d64 | 507 | drm_mm_init(&dev_priv->mm.stolen, 0, ggtt->stolen_usable_size); |
9797fbfb CW |
508 | |
509 | return 0; | |
510 | } | |
0104fdbb CW |
511 | |
512 | static struct sg_table * | |
513 | i915_pages_create_for_stolen(struct drm_device *dev, | |
514 | u32 offset, u32 size) | |
515 | { | |
72e96d64 JL |
516 | struct drm_i915_private *dev_priv = to_i915(dev); |
517 | struct i915_ggtt *ggtt = &dev_priv->ggtt; | |
0104fdbb CW |
518 | struct sg_table *st; |
519 | struct scatterlist *sg; | |
520 | ||
521 | DRM_DEBUG_DRIVER("offset=0x%x, size=%d\n", offset, size); | |
72e96d64 | 522 | BUG_ON(offset > ggtt->stolen_size - size); |
0104fdbb CW |
523 | |
524 | /* We hide that we have no struct page backing our stolen object | |
525 | * by wrapping the contiguous physical allocation with a fake | |
526 | * dma mapping in a single scatterlist. | |
527 | */ | |
528 | ||
529 | st = kmalloc(sizeof(*st), GFP_KERNEL); | |
530 | if (st == NULL) | |
531 | return NULL; | |
532 | ||
533 | if (sg_alloc_table(st, 1, GFP_KERNEL)) { | |
534 | kfree(st); | |
535 | return NULL; | |
536 | } | |
537 | ||
538 | sg = st->sgl; | |
ec14ba47 | 539 | sg->offset = 0; |
ed23abdd | 540 | sg->length = size; |
0104fdbb CW |
541 | |
542 | sg_dma_address(sg) = (dma_addr_t)dev_priv->mm.stolen_base + offset; | |
543 | sg_dma_len(sg) = size; | |
544 | ||
545 | return st; | |
546 | } | |
547 | ||
548 | static int i915_gem_object_get_pages_stolen(struct drm_i915_gem_object *obj) | |
549 | { | |
550 | BUG(); | |
551 | return -EINVAL; | |
552 | } | |
553 | ||
554 | static void i915_gem_object_put_pages_stolen(struct drm_i915_gem_object *obj) | |
555 | { | |
556 | /* Should only be called during free */ | |
557 | sg_free_table(obj->pages); | |
558 | kfree(obj->pages); | |
559 | } | |
560 | ||
ef0cf27c CW |
561 | |
562 | static void | |
563 | i915_gem_object_release_stolen(struct drm_i915_gem_object *obj) | |
564 | { | |
fac5e23e | 565 | struct drm_i915_private *dev_priv = to_i915(obj->base.dev); |
d713fd49 | 566 | |
ef0cf27c | 567 | if (obj->stolen) { |
d713fd49 | 568 | i915_gem_stolen_remove_node(dev_priv, obj->stolen); |
ef0cf27c CW |
569 | kfree(obj->stolen); |
570 | obj->stolen = NULL; | |
571 | } | |
572 | } | |
0104fdbb CW |
573 | static const struct drm_i915_gem_object_ops i915_gem_object_stolen_ops = { |
574 | .get_pages = i915_gem_object_get_pages_stolen, | |
575 | .put_pages = i915_gem_object_put_pages_stolen, | |
ef0cf27c | 576 | .release = i915_gem_object_release_stolen, |
0104fdbb CW |
577 | }; |
578 | ||
579 | static struct drm_i915_gem_object * | |
580 | _i915_gem_object_create_stolen(struct drm_device *dev, | |
581 | struct drm_mm_node *stolen) | |
582 | { | |
583 | struct drm_i915_gem_object *obj; | |
584 | ||
42dcedd4 | 585 | obj = i915_gem_object_alloc(dev); |
0104fdbb CW |
586 | if (obj == NULL) |
587 | return NULL; | |
588 | ||
89c8233f | 589 | drm_gem_private_object_init(dev, &obj->base, stolen->size); |
0104fdbb CW |
590 | i915_gem_object_init(obj, &i915_gem_object_stolen_ops); |
591 | ||
592 | obj->pages = i915_pages_create_for_stolen(dev, | |
593 | stolen->start, stolen->size); | |
594 | if (obj->pages == NULL) | |
595 | goto cleanup; | |
596 | ||
c5236470 AS |
597 | obj->get_page.sg = obj->pages->sgl; |
598 | obj->get_page.last = 0; | |
599 | ||
dd53e1b0 | 600 | i915_gem_object_pin_pages(obj); |
0104fdbb CW |
601 | obj->stolen = stolen; |
602 | ||
d46f1c3f CW |
603 | obj->base.read_domains = I915_GEM_DOMAIN_CPU | I915_GEM_DOMAIN_GTT; |
604 | obj->cache_level = HAS_LLC(dev) ? I915_CACHE_LLC : I915_CACHE_NONE; | |
0104fdbb CW |
605 | |
606 | return obj; | |
607 | ||
608 | cleanup: | |
42dcedd4 | 609 | i915_gem_object_free(obj); |
0104fdbb CW |
610 | return NULL; |
611 | } | |
612 | ||
613 | struct drm_i915_gem_object * | |
614 | i915_gem_object_create_stolen(struct drm_device *dev, u32 size) | |
615 | { | |
fac5e23e | 616 | struct drm_i915_private *dev_priv = to_i915(dev); |
0104fdbb CW |
617 | struct drm_i915_gem_object *obj; |
618 | struct drm_mm_node *stolen; | |
06e78edf | 619 | int ret; |
0104fdbb | 620 | |
446f8d81 | 621 | if (!drm_mm_initialized(&dev_priv->mm.stolen)) |
0104fdbb CW |
622 | return NULL; |
623 | ||
624 | DRM_DEBUG_KMS("creating stolen object: size=%x\n", size); | |
625 | if (size == 0) | |
626 | return NULL; | |
627 | ||
06e78edf DH |
628 | stolen = kzalloc(sizeof(*stolen), GFP_KERNEL); |
629 | if (!stolen) | |
0104fdbb CW |
630 | return NULL; |
631 | ||
d713fd49 | 632 | ret = i915_gem_stolen_insert_node(dev_priv, stolen, size, 4096); |
06e78edf DH |
633 | if (ret) { |
634 | kfree(stolen); | |
635 | return NULL; | |
636 | } | |
637 | ||
0104fdbb CW |
638 | obj = _i915_gem_object_create_stolen(dev, stolen); |
639 | if (obj) | |
640 | return obj; | |
641 | ||
d713fd49 | 642 | i915_gem_stolen_remove_node(dev_priv, stolen); |
06e78edf | 643 | kfree(stolen); |
0104fdbb CW |
644 | return NULL; |
645 | } | |
646 | ||
866d12b4 CW |
647 | struct drm_i915_gem_object * |
648 | i915_gem_object_create_stolen_for_preallocated(struct drm_device *dev, | |
649 | u32 stolen_offset, | |
650 | u32 gtt_offset, | |
651 | u32 size) | |
652 | { | |
72e96d64 JL |
653 | struct drm_i915_private *dev_priv = to_i915(dev); |
654 | struct i915_ggtt *ggtt = &dev_priv->ggtt; | |
866d12b4 CW |
655 | struct drm_i915_gem_object *obj; |
656 | struct drm_mm_node *stolen; | |
2f633156 | 657 | struct i915_vma *vma; |
b3a070cc | 658 | int ret; |
866d12b4 | 659 | |
446f8d81 | 660 | if (!drm_mm_initialized(&dev_priv->mm.stolen)) |
866d12b4 CW |
661 | return NULL; |
662 | ||
12c83d99 TU |
663 | lockdep_assert_held(&dev->struct_mutex); |
664 | ||
866d12b4 CW |
665 | DRM_DEBUG_KMS("creating preallocated stolen object: stolen_offset=%x, gtt_offset=%x, size=%x\n", |
666 | stolen_offset, gtt_offset, size); | |
667 | ||
668 | /* KISS and expect everything to be page-aligned */ | |
f37b5c2b DV |
669 | if (WARN_ON(size == 0) || WARN_ON(size & 4095) || |
670 | WARN_ON(stolen_offset & 4095)) | |
866d12b4 CW |
671 | return NULL; |
672 | ||
b3a070cc BW |
673 | stolen = kzalloc(sizeof(*stolen), GFP_KERNEL); |
674 | if (!stolen) | |
675 | return NULL; | |
676 | ||
338710e7 BW |
677 | stolen->start = stolen_offset; |
678 | stolen->size = size; | |
92e97d2f | 679 | mutex_lock(&dev_priv->mm.stolen_lock); |
338710e7 | 680 | ret = drm_mm_reserve_node(&dev_priv->mm.stolen, stolen); |
92e97d2f | 681 | mutex_unlock(&dev_priv->mm.stolen_lock); |
b3a070cc | 682 | if (ret) { |
866d12b4 | 683 | DRM_DEBUG_KMS("failed to allocate stolen space\n"); |
b3a070cc | 684 | kfree(stolen); |
866d12b4 CW |
685 | return NULL; |
686 | } | |
687 | ||
688 | obj = _i915_gem_object_create_stolen(dev, stolen); | |
689 | if (obj == NULL) { | |
690 | DRM_DEBUG_KMS("failed to allocate stolen object\n"); | |
d713fd49 | 691 | i915_gem_stolen_remove_node(dev_priv, stolen); |
06e78edf | 692 | kfree(stolen); |
866d12b4 CW |
693 | return NULL; |
694 | } | |
695 | ||
3727d55e | 696 | /* Some objects just need physical mem from stolen space */ |
190d6cd5 | 697 | if (gtt_offset == I915_GTT_OFFSET_NONE) |
3727d55e JB |
698 | return obj; |
699 | ||
058d88c4 | 700 | vma = i915_gem_obj_lookup_or_create_vma(obj, &ggtt->base, NULL); |
db473b36 DC |
701 | if (IS_ERR(vma)) { |
702 | ret = PTR_ERR(vma); | |
7c4a7d60 | 703 | goto err; |
2f633156 BW |
704 | } |
705 | ||
866d12b4 CW |
706 | /* To simplify the initialisation sequence between KMS and GTT, |
707 | * we allow construction of the stolen object prior to | |
708 | * setting up the GTT space. The actual reservation will occur | |
709 | * later. | |
710 | */ | |
2f633156 BW |
711 | vma->node.start = gtt_offset; |
712 | vma->node.size = size; | |
866d12b4 | 713 | |
f6b9d5ca CW |
714 | ret = drm_mm_reserve_node(&ggtt->base.mm, &vma->node); |
715 | if (ret) { | |
716 | DRM_DEBUG_KMS("failed to allocate stolen GTT space\n"); | |
717 | goto err; | |
7c4a7d60 | 718 | } |
866d12b4 | 719 | |
dbaf788e | 720 | vma->pages = obj->pages; |
3272db53 | 721 | vma->flags |= I915_VMA_GLOBAL_BIND; |
f6b9d5ca | 722 | __i915_vma_set_map_and_fenceable(vma); |
50e046b6 | 723 | list_move_tail(&vma->vm_link, &ggtt->base.inactive_list); |
15717de2 | 724 | obj->bind_count++; |
f6b9d5ca | 725 | |
35c20a60 | 726 | list_add_tail(&obj->global_list, &dev_priv->mm.bound_list); |
d8ccba86 | 727 | i915_gem_object_pin_pages(obj); |
866d12b4 CW |
728 | |
729 | return obj; | |
b3a070cc | 730 | |
7c4a7d60 | 731 | err: |
f8c417cd | 732 | i915_gem_object_put(obj); |
b3a070cc | 733 | return NULL; |
866d12b4 | 734 | } |