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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. |
6ba0566c | 58 | * WaSkipStolenMemoryFirstPage:bdw+ (incomplete) |
6e4f10c3 | 59 | */ |
6ba0566c | 60 | if (start < 4096 && INTEL_GEN(dev_priv) >= 8) |
1ca36d4c PZ |
61 | start = 4096; |
62 | ||
92e97d2f | 63 | mutex_lock(&dev_priv->mm.stolen_lock); |
a9da512b PZ |
64 | ret = drm_mm_insert_node_in_range(&dev_priv->mm.stolen, node, size, |
65 | alignment, start, end, | |
66 | DRM_MM_SEARCH_DEFAULT); | |
92e97d2f PZ |
67 | mutex_unlock(&dev_priv->mm.stolen_lock); |
68 | ||
69 | return ret; | |
d713fd49 PZ |
70 | } |
71 | ||
a9da512b PZ |
72 | int i915_gem_stolen_insert_node(struct drm_i915_private *dev_priv, |
73 | struct drm_mm_node *node, u64 size, | |
74 | unsigned alignment) | |
75 | { | |
72e96d64 JL |
76 | struct i915_ggtt *ggtt = &dev_priv->ggtt; |
77 | ||
a9da512b | 78 | return i915_gem_stolen_insert_node_in_range(dev_priv, node, size, |
72e96d64 JL |
79 | alignment, 0, |
80 | ggtt->stolen_usable_size); | |
a9da512b PZ |
81 | } |
82 | ||
d713fd49 PZ |
83 | void i915_gem_stolen_remove_node(struct drm_i915_private *dev_priv, |
84 | struct drm_mm_node *node) | |
85 | { | |
92e97d2f | 86 | mutex_lock(&dev_priv->mm.stolen_lock); |
d713fd49 | 87 | drm_mm_remove_node(node); |
92e97d2f | 88 | mutex_unlock(&dev_priv->mm.stolen_lock); |
d713fd49 PZ |
89 | } |
90 | ||
7ace3d30 | 91 | static unsigned long i915_stolen_to_physical(struct drm_i915_private *dev_priv) |
9797fbfb | 92 | { |
52a05c30 | 93 | struct pci_dev *pdev = dev_priv->drm.pdev; |
72e96d64 | 94 | struct i915_ggtt *ggtt = &dev_priv->ggtt; |
eaba1b8f | 95 | struct resource *r; |
9797fbfb CW |
96 | u32 base; |
97 | ||
17fec8a0 | 98 | /* Almost universally we can find the Graphics Base of Stolen Memory |
e10fa551 JL |
99 | * at register BSM (0x5c) in the igfx configuration space. On a few |
100 | * (desktop) machines this is also mirrored in the bridge device at | |
101 | * different locations, or in the MCHBAR. | |
0ad98c74 VS |
102 | * |
103 | * On 865 we just check the TOUD register. | |
104 | * | |
105 | * On 830/845/85x the stolen memory base isn't available in any | |
106 | * register. We need to calculate it as TOM-TSEG_SIZE-stolen_size. | |
e12a2d53 | 107 | * |
9797fbfb | 108 | */ |
e12a2d53 | 109 | base = 0; |
a9097be4 | 110 | if (INTEL_GEN(dev_priv) >= 3) { |
e10fa551 JL |
111 | u32 bsm; |
112 | ||
52a05c30 | 113 | pci_read_config_dword(pdev, INTEL_BSM, &bsm); |
e10fa551 | 114 | |
c0dd3460 | 115 | base = bsm & INTEL_BSM_MASK; |
50a0bc90 | 116 | } else if (IS_I865G(dev_priv)) { |
d721b02f | 117 | u32 tseg_size = 0; |
0ad98c74 | 118 | u16 toud = 0; |
d721b02f VS |
119 | u8 tmp; |
120 | ||
52a05c30 | 121 | pci_bus_read_config_byte(pdev->bus, PCI_DEVFN(0, 0), |
d721b02f VS |
122 | I845_ESMRAMC, &tmp); |
123 | ||
124 | if (tmp & TSEG_ENABLE) { | |
125 | switch (tmp & I845_TSEG_SIZE_MASK) { | |
126 | case I845_TSEG_SIZE_512K: | |
127 | tseg_size = KB(512); | |
128 | break; | |
129 | case I845_TSEG_SIZE_1M: | |
130 | tseg_size = MB(1); | |
131 | break; | |
132 | } | |
133 | } | |
0ad98c74 | 134 | |
52a05c30 | 135 | pci_bus_read_config_word(pdev->bus, PCI_DEVFN(0, 0), |
0ad98c74 VS |
136 | I865_TOUD, &toud); |
137 | ||
d721b02f | 138 | base = (toud << 16) + tseg_size; |
a9097be4 | 139 | } else if (IS_I85X(dev_priv)) { |
0ad98c74 VS |
140 | u32 tseg_size = 0; |
141 | u32 tom; | |
142 | u8 tmp; | |
143 | ||
52a05c30 | 144 | pci_bus_read_config_byte(pdev->bus, PCI_DEVFN(0, 0), |
0ad98c74 VS |
145 | I85X_ESMRAMC, &tmp); |
146 | ||
147 | if (tmp & TSEG_ENABLE) | |
148 | tseg_size = MB(1); | |
149 | ||
52a05c30 | 150 | pci_bus_read_config_byte(pdev->bus, PCI_DEVFN(0, 1), |
0ad98c74 VS |
151 | I85X_DRB3, &tmp); |
152 | tom = tmp * MB(32); | |
153 | ||
72e96d64 | 154 | base = tom - tseg_size - ggtt->stolen_size; |
50a0bc90 | 155 | } else if (IS_845G(dev_priv)) { |
0ad98c74 VS |
156 | u32 tseg_size = 0; |
157 | u32 tom; | |
158 | u8 tmp; | |
159 | ||
52a05c30 | 160 | pci_bus_read_config_byte(pdev->bus, PCI_DEVFN(0, 0), |
0ad98c74 VS |
161 | I845_ESMRAMC, &tmp); |
162 | ||
163 | if (tmp & TSEG_ENABLE) { | |
164 | switch (tmp & I845_TSEG_SIZE_MASK) { | |
165 | case I845_TSEG_SIZE_512K: | |
166 | tseg_size = KB(512); | |
167 | break; | |
168 | case I845_TSEG_SIZE_1M: | |
169 | tseg_size = MB(1); | |
170 | break; | |
171 | } | |
172 | } | |
173 | ||
52a05c30 | 174 | pci_bus_read_config_byte(pdev->bus, PCI_DEVFN(0, 0), |
0ad98c74 VS |
175 | I830_DRB3, &tmp); |
176 | tom = tmp * MB(32); | |
177 | ||
72e96d64 | 178 | base = tom - tseg_size - ggtt->stolen_size; |
50a0bc90 | 179 | } else if (IS_I830(dev_priv)) { |
0ad98c74 VS |
180 | u32 tseg_size = 0; |
181 | u32 tom; | |
182 | u8 tmp; | |
183 | ||
52a05c30 | 184 | pci_bus_read_config_byte(pdev->bus, PCI_DEVFN(0, 0), |
0ad98c74 VS |
185 | I830_ESMRAMC, &tmp); |
186 | ||
187 | if (tmp & TSEG_ENABLE) { | |
188 | if (tmp & I830_TSEG_SIZE_1M) | |
189 | tseg_size = MB(1); | |
190 | else | |
191 | tseg_size = KB(512); | |
192 | } | |
193 | ||
52a05c30 | 194 | pci_bus_read_config_byte(pdev->bus, PCI_DEVFN(0, 0), |
0ad98c74 VS |
195 | I830_DRB3, &tmp); |
196 | tom = tmp * MB(32); | |
197 | ||
72e96d64 | 198 | base = tom - tseg_size - ggtt->stolen_size; |
e12a2d53 | 199 | } |
9797fbfb | 200 | |
eaba1b8f CW |
201 | if (base == 0) |
202 | return 0; | |
203 | ||
f1e1c212 | 204 | /* make sure we don't clobber the GTT if it's within stolen memory */ |
9beb5fea TU |
205 | if (INTEL_GEN(dev_priv) <= 4 && !IS_G33(dev_priv) && |
206 | !IS_G4X(dev_priv)) { | |
f1e1c212 VS |
207 | struct { |
208 | u32 start, end; | |
209 | } stolen[2] = { | |
72e96d64 JL |
210 | { .start = base, .end = base + ggtt->stolen_size, }, |
211 | { .start = base, .end = base + ggtt->stolen_size, }, | |
f1e1c212 | 212 | }; |
72e96d64 | 213 | u64 ggtt_start, ggtt_end; |
f1e1c212 | 214 | |
72e96d64 | 215 | ggtt_start = I915_READ(PGTBL_CTL); |
5db94019 | 216 | if (IS_GEN4(dev_priv)) |
72e96d64 JL |
217 | ggtt_start = (ggtt_start & PGTBL_ADDRESS_LO_MASK) | |
218 | (ggtt_start & PGTBL_ADDRESS_HI_MASK) << 28; | |
f1e1c212 | 219 | else |
72e96d64 JL |
220 | ggtt_start &= PGTBL_ADDRESS_LO_MASK; |
221 | ggtt_end = ggtt_start + ggtt_total_entries(ggtt) * 4; | |
f1e1c212 | 222 | |
72e96d64 JL |
223 | if (ggtt_start >= stolen[0].start && ggtt_start < stolen[0].end) |
224 | stolen[0].end = ggtt_start; | |
225 | if (ggtt_end > stolen[1].start && ggtt_end <= stolen[1].end) | |
226 | stolen[1].start = ggtt_end; | |
f1e1c212 VS |
227 | |
228 | /* pick the larger of the two chunks */ | |
229 | if (stolen[0].end - stolen[0].start > | |
230 | stolen[1].end - stolen[1].start) { | |
231 | base = stolen[0].start; | |
72e96d64 | 232 | ggtt->stolen_size = stolen[0].end - stolen[0].start; |
f1e1c212 VS |
233 | } else { |
234 | base = stolen[1].start; | |
72e96d64 | 235 | ggtt->stolen_size = stolen[1].end - stolen[1].start; |
f1e1c212 VS |
236 | } |
237 | ||
238 | if (stolen[0].start != stolen[1].start || | |
239 | stolen[0].end != stolen[1].end) { | |
240 | DRM_DEBUG_KMS("GTT within stolen memory at 0x%llx-0x%llx\n", | |
72e96d64 JL |
241 | (unsigned long long)ggtt_start, |
242 | (unsigned long long)ggtt_end - 1); | |
f1e1c212 | 243 | DRM_DEBUG_KMS("Stolen memory adjusted to 0x%x-0x%x\n", |
72e96d64 | 244 | base, base + (u32)ggtt->stolen_size - 1); |
f1e1c212 VS |
245 | } |
246 | } | |
247 | ||
248 | ||
eaba1b8f CW |
249 | /* Verify that nothing else uses this physical address. Stolen |
250 | * memory should be reserved by the BIOS and hidden from the | |
251 | * kernel. So if the region is already marked as busy, something | |
252 | * is seriously wrong. | |
253 | */ | |
7ace3d30 | 254 | r = devm_request_mem_region(dev_priv->drm.dev, base, ggtt->stolen_size, |
eaba1b8f CW |
255 | "Graphics Stolen Memory"); |
256 | if (r == NULL) { | |
3617dc96 AG |
257 | /* |
258 | * One more attempt but this time requesting region from | |
259 | * base + 1, as we have seen that this resolves the region | |
260 | * conflict with the PCI Bus. | |
261 | * This is a BIOS w/a: Some BIOS wrap stolen in the root | |
262 | * PCI bus, but have an off-by-one error. Hence retry the | |
263 | * reservation starting from 1 instead of 0. | |
264 | */ | |
7ace3d30 | 265 | r = devm_request_mem_region(dev_priv->drm.dev, base + 1, |
72e96d64 | 266 | ggtt->stolen_size - 1, |
3617dc96 | 267 | "Graphics Stolen Memory"); |
0b6d24c0 DV |
268 | /* |
269 | * GEN3 firmware likes to smash pci bridges into the stolen | |
270 | * range. Apparently this works. | |
271 | */ | |
5db94019 | 272 | if (r == NULL && !IS_GEN3(dev_priv)) { |
3617dc96 | 273 | DRM_ERROR("conflict detected with stolen region: [0x%08x - 0x%08x]\n", |
72e96d64 | 274 | base, base + (uint32_t)ggtt->stolen_size); |
3617dc96 AG |
275 | base = 0; |
276 | } | |
eaba1b8f CW |
277 | } |
278 | ||
e12a2d53 | 279 | return base; |
9797fbfb CW |
280 | } |
281 | ||
9797fbfb CW |
282 | void i915_gem_cleanup_stolen(struct drm_device *dev) |
283 | { | |
fac5e23e | 284 | struct drm_i915_private *dev_priv = to_i915(dev); |
4d7bb011 | 285 | |
446f8d81 DV |
286 | if (!drm_mm_initialized(&dev_priv->mm.stolen)) |
287 | return; | |
288 | ||
4d7bb011 | 289 | drm_mm_takedown(&dev_priv->mm.stolen); |
9797fbfb CW |
290 | } |
291 | ||
7d316aec VS |
292 | static void g4x_get_stolen_reserved(struct drm_i915_private *dev_priv, |
293 | unsigned long *base, unsigned long *size) | |
294 | { | |
72e96d64 | 295 | struct i915_ggtt *ggtt = &dev_priv->ggtt; |
7d316aec VS |
296 | uint32_t reg_val = I915_READ(IS_GM45(dev_priv) ? |
297 | CTG_STOLEN_RESERVED : | |
298 | ELK_STOLEN_RESERVED); | |
299 | unsigned long stolen_top = dev_priv->mm.stolen_base + | |
72e96d64 | 300 | ggtt->stolen_size; |
7d316aec VS |
301 | |
302 | *base = (reg_val & G4X_STOLEN_RESERVED_ADDR2_MASK) << 16; | |
303 | ||
304 | WARN_ON((reg_val & G4X_STOLEN_RESERVED_ADDR1_MASK) < *base); | |
305 | ||
306 | /* On these platforms, the register doesn't have a size field, so the | |
307 | * size is the distance between the base and the top of the stolen | |
308 | * memory. We also have the genuine case where base is zero and there's | |
309 | * nothing reserved. */ | |
310 | if (*base == 0) | |
311 | *size = 0; | |
312 | else | |
313 | *size = stolen_top - *base; | |
314 | } | |
315 | ||
3774eb50 PZ |
316 | static void gen6_get_stolen_reserved(struct drm_i915_private *dev_priv, |
317 | unsigned long *base, unsigned long *size) | |
318 | { | |
319 | uint32_t reg_val = I915_READ(GEN6_STOLEN_RESERVED); | |
320 | ||
321 | *base = reg_val & GEN6_STOLEN_RESERVED_ADDR_MASK; | |
322 | ||
323 | switch (reg_val & GEN6_STOLEN_RESERVED_SIZE_MASK) { | |
324 | case GEN6_STOLEN_RESERVED_1M: | |
325 | *size = 1024 * 1024; | |
326 | break; | |
327 | case GEN6_STOLEN_RESERVED_512K: | |
328 | *size = 512 * 1024; | |
329 | break; | |
330 | case GEN6_STOLEN_RESERVED_256K: | |
331 | *size = 256 * 1024; | |
332 | break; | |
333 | case GEN6_STOLEN_RESERVED_128K: | |
334 | *size = 128 * 1024; | |
335 | break; | |
336 | default: | |
337 | *size = 1024 * 1024; | |
338 | MISSING_CASE(reg_val & GEN6_STOLEN_RESERVED_SIZE_MASK); | |
339 | } | |
340 | } | |
341 | ||
342 | static void gen7_get_stolen_reserved(struct drm_i915_private *dev_priv, | |
343 | unsigned long *base, unsigned long *size) | |
344 | { | |
345 | uint32_t reg_val = I915_READ(GEN6_STOLEN_RESERVED); | |
346 | ||
347 | *base = reg_val & GEN7_STOLEN_RESERVED_ADDR_MASK; | |
348 | ||
349 | switch (reg_val & GEN7_STOLEN_RESERVED_SIZE_MASK) { | |
350 | case GEN7_STOLEN_RESERVED_1M: | |
351 | *size = 1024 * 1024; | |
352 | break; | |
353 | case GEN7_STOLEN_RESERVED_256K: | |
354 | *size = 256 * 1024; | |
355 | break; | |
356 | default: | |
357 | *size = 1024 * 1024; | |
358 | MISSING_CASE(reg_val & GEN7_STOLEN_RESERVED_SIZE_MASK); | |
359 | } | |
360 | } | |
361 | ||
362 | static void gen8_get_stolen_reserved(struct drm_i915_private *dev_priv, | |
363 | unsigned long *base, unsigned long *size) | |
364 | { | |
365 | uint32_t reg_val = I915_READ(GEN6_STOLEN_RESERVED); | |
366 | ||
367 | *base = reg_val & GEN6_STOLEN_RESERVED_ADDR_MASK; | |
368 | ||
369 | switch (reg_val & GEN8_STOLEN_RESERVED_SIZE_MASK) { | |
370 | case GEN8_STOLEN_RESERVED_1M: | |
371 | *size = 1024 * 1024; | |
372 | break; | |
373 | case GEN8_STOLEN_RESERVED_2M: | |
374 | *size = 2 * 1024 * 1024; | |
375 | break; | |
376 | case GEN8_STOLEN_RESERVED_4M: | |
377 | *size = 4 * 1024 * 1024; | |
378 | break; | |
379 | case GEN8_STOLEN_RESERVED_8M: | |
380 | *size = 8 * 1024 * 1024; | |
381 | break; | |
382 | default: | |
383 | *size = 8 * 1024 * 1024; | |
384 | MISSING_CASE(reg_val & GEN8_STOLEN_RESERVED_SIZE_MASK); | |
385 | } | |
386 | } | |
387 | ||
388 | static void bdw_get_stolen_reserved(struct drm_i915_private *dev_priv, | |
389 | unsigned long *base, unsigned long *size) | |
390 | { | |
72e96d64 | 391 | struct i915_ggtt *ggtt = &dev_priv->ggtt; |
3774eb50 PZ |
392 | uint32_t reg_val = I915_READ(GEN6_STOLEN_RESERVED); |
393 | unsigned long stolen_top; | |
394 | ||
72e96d64 | 395 | stolen_top = dev_priv->mm.stolen_base + ggtt->stolen_size; |
3774eb50 PZ |
396 | |
397 | *base = reg_val & GEN6_STOLEN_RESERVED_ADDR_MASK; | |
398 | ||
399 | /* On these platforms, the register doesn't have a size field, so the | |
400 | * size is the distance between the base and the top of the stolen | |
401 | * memory. We also have the genuine case where base is zero and there's | |
402 | * nothing reserved. */ | |
403 | if (*base == 0) | |
404 | *size = 0; | |
405 | else | |
406 | *size = stolen_top - *base; | |
407 | } | |
408 | ||
7ace3d30 | 409 | int i915_gem_init_stolen(struct drm_i915_private *dev_priv) |
9797fbfb | 410 | { |
72e96d64 | 411 | struct i915_ggtt *ggtt = &dev_priv->ggtt; |
d7884d69 | 412 | unsigned long reserved_total, reserved_base = 0, reserved_size; |
3774eb50 | 413 | unsigned long stolen_top; |
9797fbfb | 414 | |
92e97d2f PZ |
415 | mutex_init(&dev_priv->mm.stolen_lock); |
416 | ||
65b964bc CW |
417 | if (intel_vgpu_active(dev_priv)) { |
418 | DRM_INFO("iGVT-g active, disabling use of stolen memory\n"); | |
419 | return 0; | |
420 | } | |
421 | ||
0f4706d2 | 422 | #ifdef CONFIG_INTEL_IOMMU |
7ace3d30 | 423 | if (intel_iommu_gfx_mapped && INTEL_GEN(dev_priv) < 8) { |
0f4706d2 CW |
424 | DRM_INFO("DMAR active, disabling use of stolen memory\n"); |
425 | return 0; | |
426 | } | |
427 | #endif | |
428 | ||
72e96d64 | 429 | if (ggtt->stolen_size == 0) |
6644a4e9 CW |
430 | return 0; |
431 | ||
7ace3d30 | 432 | dev_priv->mm.stolen_base = i915_stolen_to_physical(dev_priv); |
e12a2d53 CW |
433 | if (dev_priv->mm.stolen_base == 0) |
434 | return 0; | |
435 | ||
72e96d64 | 436 | stolen_top = dev_priv->mm.stolen_base + ggtt->stolen_size; |
3774eb50 PZ |
437 | |
438 | switch (INTEL_INFO(dev_priv)->gen) { | |
439 | case 2: | |
440 | case 3: | |
7d316aec | 441 | break; |
3774eb50 | 442 | case 4: |
9beb5fea | 443 | if (IS_G4X(dev_priv)) |
7d316aec VS |
444 | g4x_get_stolen_reserved(dev_priv, &reserved_base, |
445 | &reserved_size); | |
446 | break; | |
3774eb50 PZ |
447 | case 5: |
448 | /* Assume the gen6 maximum for the older platforms. */ | |
449 | reserved_size = 1024 * 1024; | |
450 | reserved_base = stolen_top - reserved_size; | |
451 | break; | |
452 | case 6: | |
453 | gen6_get_stolen_reserved(dev_priv, &reserved_base, | |
454 | &reserved_size); | |
455 | break; | |
456 | case 7: | |
457 | gen7_get_stolen_reserved(dev_priv, &reserved_base, | |
458 | &reserved_size); | |
459 | break; | |
460 | default: | |
ef11bdb3 | 461 | if (IS_BROADWELL(dev_priv) || |
0853723b | 462 | IS_SKYLAKE(dev_priv) || IS_KABYLAKE(dev_priv)) |
3774eb50 PZ |
463 | bdw_get_stolen_reserved(dev_priv, &reserved_base, |
464 | &reserved_size); | |
465 | else | |
466 | gen8_get_stolen_reserved(dev_priv, &reserved_base, | |
467 | &reserved_size); | |
468 | break; | |
469 | } | |
470 | ||
471 | /* It is possible for the reserved base to be zero, but the register | |
472 | * field for size doesn't have a zero option. */ | |
473 | if (reserved_base == 0) { | |
474 | reserved_size = 0; | |
475 | reserved_base = stolen_top; | |
40bae736 | 476 | } |
c9cddffc | 477 | |
3774eb50 PZ |
478 | if (reserved_base < dev_priv->mm.stolen_base || |
479 | reserved_base + reserved_size > stolen_top) { | |
480 | DRM_DEBUG_KMS("Stolen reserved area [0x%08lx - 0x%08lx] outside stolen memory [0x%08lx - 0x%08lx]\n", | |
481 | reserved_base, reserved_base + reserved_size, | |
482 | dev_priv->mm.stolen_base, stolen_top); | |
897f9ed0 | 483 | return 0; |
3774eb50 PZ |
484 | } |
485 | ||
72e96d64 JL |
486 | ggtt->stolen_reserved_base = reserved_base; |
487 | ggtt->stolen_reserved_size = reserved_size; | |
274008e8 | 488 | |
3774eb50 PZ |
489 | /* It is possible for the reserved area to end before the end of stolen |
490 | * memory, so just consider the start. */ | |
491 | reserved_total = stolen_top - reserved_base; | |
492 | ||
8e9d597a | 493 | DRM_DEBUG_KMS("Memory reserved for graphics device: %zuK, usable: %luK\n", |
72e96d64 JL |
494 | ggtt->stolen_size >> 10, |
495 | (ggtt->stolen_size - reserved_total) >> 10); | |
897f9ed0 | 496 | |
72e96d64 | 497 | ggtt->stolen_usable_size = ggtt->stolen_size - reserved_total; |
a9da512b | 498 | |
1ca36d4c PZ |
499 | /* |
500 | * Basic memrange allocator for stolen space. | |
501 | * | |
502 | * TODO: Notice that some platforms require us to not use the first page | |
503 | * of the stolen memory but their BIOSes may still put the framebuffer | |
504 | * on the first page. So we don't reserve this page for now because of | |
505 | * that. Our current solution is to just prevent new nodes from being | |
506 | * inserted on the first page - see the check we have at | |
507 | * i915_gem_stolen_insert_node_in_range(). We may want to fix the fbcon | |
508 | * problem later. | |
509 | */ | |
72e96d64 | 510 | drm_mm_init(&dev_priv->mm.stolen, 0, ggtt->stolen_usable_size); |
9797fbfb CW |
511 | |
512 | return 0; | |
513 | } | |
0104fdbb CW |
514 | |
515 | static struct sg_table * | |
516 | i915_pages_create_for_stolen(struct drm_device *dev, | |
517 | u32 offset, u32 size) | |
518 | { | |
72e96d64 | 519 | struct drm_i915_private *dev_priv = to_i915(dev); |
0104fdbb CW |
520 | struct sg_table *st; |
521 | struct scatterlist *sg; | |
522 | ||
6288c79e | 523 | GEM_BUG_ON(offset > dev_priv->ggtt.stolen_size - size); |
0104fdbb CW |
524 | |
525 | /* We hide that we have no struct page backing our stolen object | |
526 | * by wrapping the contiguous physical allocation with a fake | |
527 | * dma mapping in a single scatterlist. | |
528 | */ | |
529 | ||
530 | st = kmalloc(sizeof(*st), GFP_KERNEL); | |
531 | if (st == NULL) | |
43e157fa | 532 | return ERR_PTR(-ENOMEM); |
0104fdbb CW |
533 | |
534 | if (sg_alloc_table(st, 1, GFP_KERNEL)) { | |
535 | kfree(st); | |
43e157fa | 536 | return ERR_PTR(-ENOMEM); |
0104fdbb CW |
537 | } |
538 | ||
539 | sg = st->sgl; | |
ec14ba47 | 540 | sg->offset = 0; |
ed23abdd | 541 | sg->length = size; |
0104fdbb CW |
542 | |
543 | sg_dma_address(sg) = (dma_addr_t)dev_priv->mm.stolen_base + offset; | |
544 | sg_dma_len(sg) = size; | |
545 | ||
546 | return st; | |
547 | } | |
548 | ||
03ac84f1 CW |
549 | static struct sg_table * |
550 | i915_gem_object_get_pages_stolen(struct drm_i915_gem_object *obj) | |
0104fdbb | 551 | { |
03ac84f1 CW |
552 | return i915_pages_create_for_stolen(obj->base.dev, |
553 | obj->stolen->start, | |
554 | obj->stolen->size); | |
0104fdbb CW |
555 | } |
556 | ||
03ac84f1 CW |
557 | static void i915_gem_object_put_pages_stolen(struct drm_i915_gem_object *obj, |
558 | struct sg_table *pages) | |
0104fdbb | 559 | { |
6288c79e | 560 | /* Should only be called from i915_gem_object_release_stolen() */ |
03ac84f1 CW |
561 | sg_free_table(pages); |
562 | kfree(pages); | |
0104fdbb CW |
563 | } |
564 | ||
ef0cf27c CW |
565 | static void |
566 | i915_gem_object_release_stolen(struct drm_i915_gem_object *obj) | |
567 | { | |
fac5e23e | 568 | struct drm_i915_private *dev_priv = to_i915(obj->base.dev); |
6288c79e CW |
569 | struct drm_mm_node *stolen = fetch_and_zero(&obj->stolen); |
570 | ||
571 | GEM_BUG_ON(!stolen); | |
d713fd49 | 572 | |
a4f5ea64 CW |
573 | __i915_gem_object_unpin_pages(obj); |
574 | ||
6288c79e CW |
575 | i915_gem_stolen_remove_node(dev_priv, stolen); |
576 | kfree(stolen); | |
ef0cf27c | 577 | } |
6288c79e | 578 | |
0104fdbb CW |
579 | static const struct drm_i915_gem_object_ops i915_gem_object_stolen_ops = { |
580 | .get_pages = i915_gem_object_get_pages_stolen, | |
581 | .put_pages = i915_gem_object_put_pages_stolen, | |
ef0cf27c | 582 | .release = i915_gem_object_release_stolen, |
0104fdbb CW |
583 | }; |
584 | ||
585 | static struct drm_i915_gem_object * | |
586 | _i915_gem_object_create_stolen(struct drm_device *dev, | |
587 | struct drm_mm_node *stolen) | |
588 | { | |
589 | struct drm_i915_gem_object *obj; | |
590 | ||
42dcedd4 | 591 | obj = i915_gem_object_alloc(dev); |
0104fdbb CW |
592 | if (obj == NULL) |
593 | return NULL; | |
594 | ||
89c8233f | 595 | drm_gem_private_object_init(dev, &obj->base, stolen->size); |
0104fdbb CW |
596 | i915_gem_object_init(obj, &i915_gem_object_stolen_ops); |
597 | ||
0104fdbb | 598 | obj->stolen = stolen; |
d46f1c3f | 599 | obj->base.read_domains = I915_GEM_DOMAIN_CPU | I915_GEM_DOMAIN_GTT; |
0031fb96 TU |
600 | obj->cache_level = HAS_LLC(to_i915(dev)) ? |
601 | I915_CACHE_LLC : I915_CACHE_NONE; | |
0104fdbb | 602 | |
03ac84f1 CW |
603 | if (i915_gem_object_pin_pages(obj)) |
604 | goto cleanup; | |
605 | ||
0104fdbb CW |
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 | ||
0104fdbb CW |
624 | if (size == 0) |
625 | return NULL; | |
626 | ||
06e78edf DH |
627 | stolen = kzalloc(sizeof(*stolen), GFP_KERNEL); |
628 | if (!stolen) | |
0104fdbb CW |
629 | return NULL; |
630 | ||
d713fd49 | 631 | ret = i915_gem_stolen_insert_node(dev_priv, stolen, size, 4096); |
06e78edf DH |
632 | if (ret) { |
633 | kfree(stolen); | |
634 | return NULL; | |
635 | } | |
636 | ||
0104fdbb CW |
637 | obj = _i915_gem_object_create_stolen(dev, stolen); |
638 | if (obj) | |
639 | return obj; | |
640 | ||
d713fd49 | 641 | i915_gem_stolen_remove_node(dev_priv, stolen); |
06e78edf | 642 | kfree(stolen); |
0104fdbb CW |
643 | return NULL; |
644 | } | |
645 | ||
866d12b4 CW |
646 | struct drm_i915_gem_object * |
647 | i915_gem_object_create_stolen_for_preallocated(struct drm_device *dev, | |
648 | u32 stolen_offset, | |
649 | u32 gtt_offset, | |
650 | u32 size) | |
651 | { | |
72e96d64 JL |
652 | struct drm_i915_private *dev_priv = to_i915(dev); |
653 | struct i915_ggtt *ggtt = &dev_priv->ggtt; | |
866d12b4 CW |
654 | struct drm_i915_gem_object *obj; |
655 | struct drm_mm_node *stolen; | |
2f633156 | 656 | struct i915_vma *vma; |
b3a070cc | 657 | int ret; |
866d12b4 | 658 | |
446f8d81 | 659 | if (!drm_mm_initialized(&dev_priv->mm.stolen)) |
866d12b4 CW |
660 | return NULL; |
661 | ||
12c83d99 TU |
662 | lockdep_assert_held(&dev->struct_mutex); |
663 | ||
866d12b4 CW |
664 | DRM_DEBUG_KMS("creating preallocated stolen object: stolen_offset=%x, gtt_offset=%x, size=%x\n", |
665 | stolen_offset, gtt_offset, size); | |
666 | ||
667 | /* KISS and expect everything to be page-aligned */ | |
f37b5c2b DV |
668 | if (WARN_ON(size == 0) || WARN_ON(size & 4095) || |
669 | WARN_ON(stolen_offset & 4095)) | |
866d12b4 CW |
670 | return NULL; |
671 | ||
b3a070cc BW |
672 | stolen = kzalloc(sizeof(*stolen), GFP_KERNEL); |
673 | if (!stolen) | |
674 | return NULL; | |
675 | ||
338710e7 BW |
676 | stolen->start = stolen_offset; |
677 | stolen->size = size; | |
92e97d2f | 678 | mutex_lock(&dev_priv->mm.stolen_lock); |
338710e7 | 679 | ret = drm_mm_reserve_node(&dev_priv->mm.stolen, stolen); |
92e97d2f | 680 | mutex_unlock(&dev_priv->mm.stolen_lock); |
b3a070cc | 681 | if (ret) { |
866d12b4 | 682 | DRM_DEBUG_KMS("failed to allocate stolen space\n"); |
b3a070cc | 683 | kfree(stolen); |
866d12b4 CW |
684 | return NULL; |
685 | } | |
686 | ||
687 | obj = _i915_gem_object_create_stolen(dev, stolen); | |
688 | if (obj == NULL) { | |
689 | DRM_DEBUG_KMS("failed to allocate stolen object\n"); | |
d713fd49 | 690 | i915_gem_stolen_remove_node(dev_priv, stolen); |
06e78edf | 691 | kfree(stolen); |
866d12b4 CW |
692 | return NULL; |
693 | } | |
694 | ||
3727d55e | 695 | /* Some objects just need physical mem from stolen space */ |
190d6cd5 | 696 | if (gtt_offset == I915_GTT_OFFSET_NONE) |
3727d55e JB |
697 | return obj; |
698 | ||
03ac84f1 CW |
699 | ret = i915_gem_object_pin_pages(obj); |
700 | if (ret) | |
701 | goto err; | |
702 | ||
058d88c4 | 703 | vma = i915_gem_obj_lookup_or_create_vma(obj, &ggtt->base, NULL); |
db473b36 DC |
704 | if (IS_ERR(vma)) { |
705 | ret = PTR_ERR(vma); | |
03ac84f1 | 706 | goto err_pages; |
2f633156 BW |
707 | } |
708 | ||
866d12b4 CW |
709 | /* To simplify the initialisation sequence between KMS and GTT, |
710 | * we allow construction of the stolen object prior to | |
711 | * setting up the GTT space. The actual reservation will occur | |
712 | * later. | |
713 | */ | |
2f633156 BW |
714 | vma->node.start = gtt_offset; |
715 | vma->node.size = size; | |
866d12b4 | 716 | |
f6b9d5ca CW |
717 | ret = drm_mm_reserve_node(&ggtt->base.mm, &vma->node); |
718 | if (ret) { | |
719 | DRM_DEBUG_KMS("failed to allocate stolen GTT space\n"); | |
03ac84f1 | 720 | goto err_pages; |
7c4a7d60 | 721 | } |
866d12b4 | 722 | |
a4f5ea64 | 723 | vma->pages = obj->mm.pages; |
3272db53 | 724 | vma->flags |= I915_VMA_GLOBAL_BIND; |
f6b9d5ca | 725 | __i915_vma_set_map_and_fenceable(vma); |
50e046b6 | 726 | list_move_tail(&vma->vm_link, &ggtt->base.inactive_list); |
56cea323 | 727 | list_move_tail(&obj->global_link, &dev_priv->mm.bound_list); |
15717de2 | 728 | obj->bind_count++; |
f6b9d5ca | 729 | |
866d12b4 | 730 | return obj; |
b3a070cc | 731 | |
03ac84f1 CW |
732 | err_pages: |
733 | i915_gem_object_unpin_pages(obj); | |
7c4a7d60 | 734 | err: |
f8c417cd | 735 | i915_gem_object_put(obj); |
b3a070cc | 736 | return NULL; |
866d12b4 | 737 | } |