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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 | ||
92e97d2f | 57 | mutex_lock(&dev_priv->mm.stolen_lock); |
4e64e553 CW |
58 | ret = drm_mm_insert_node_in_range(&dev_priv->mm.stolen, node, |
59 | size, alignment, 0, | |
60 | start, end, DRM_MM_INSERT_BEST); | |
92e97d2f PZ |
61 | mutex_unlock(&dev_priv->mm.stolen_lock); |
62 | ||
63 | return ret; | |
d713fd49 PZ |
64 | } |
65 | ||
a9da512b PZ |
66 | int i915_gem_stolen_insert_node(struct drm_i915_private *dev_priv, |
67 | struct drm_mm_node *node, u64 size, | |
68 | unsigned alignment) | |
69 | { | |
70 | return i915_gem_stolen_insert_node_in_range(dev_priv, node, size, | |
3c6b29b2 | 71 | alignment, 0, U64_MAX); |
a9da512b PZ |
72 | } |
73 | ||
d713fd49 PZ |
74 | void i915_gem_stolen_remove_node(struct drm_i915_private *dev_priv, |
75 | struct drm_mm_node *node) | |
76 | { | |
92e97d2f | 77 | mutex_lock(&dev_priv->mm.stolen_lock); |
d713fd49 | 78 | drm_mm_remove_node(node); |
92e97d2f | 79 | mutex_unlock(&dev_priv->mm.stolen_lock); |
d713fd49 PZ |
80 | } |
81 | ||
c8847387 | 82 | static dma_addr_t i915_stolen_to_dma(struct drm_i915_private *dev_priv) |
9797fbfb | 83 | { |
52a05c30 | 84 | struct pci_dev *pdev = dev_priv->drm.pdev; |
72e96d64 | 85 | struct i915_ggtt *ggtt = &dev_priv->ggtt; |
eaba1b8f | 86 | struct resource *r; |
c8847387 | 87 | dma_addr_t base; |
9797fbfb | 88 | |
17fec8a0 | 89 | /* Almost universally we can find the Graphics Base of Stolen Memory |
e10fa551 JL |
90 | * at register BSM (0x5c) in the igfx configuration space. On a few |
91 | * (desktop) machines this is also mirrored in the bridge device at | |
92 | * different locations, or in the MCHBAR. | |
0ad98c74 VS |
93 | * |
94 | * On 865 we just check the TOUD register. | |
95 | * | |
96 | * On 830/845/85x the stolen memory base isn't available in any | |
97 | * register. We need to calculate it as TOM-TSEG_SIZE-stolen_size. | |
e12a2d53 | 98 | * |
9797fbfb | 99 | */ |
e12a2d53 | 100 | base = 0; |
a9097be4 | 101 | if (INTEL_GEN(dev_priv) >= 3) { |
e10fa551 JL |
102 | u32 bsm; |
103 | ||
52a05c30 | 104 | pci_read_config_dword(pdev, INTEL_BSM, &bsm); |
e10fa551 | 105 | |
c0dd3460 | 106 | base = bsm & INTEL_BSM_MASK; |
50a0bc90 | 107 | } else if (IS_I865G(dev_priv)) { |
d721b02f | 108 | u32 tseg_size = 0; |
0ad98c74 | 109 | u16 toud = 0; |
d721b02f VS |
110 | u8 tmp; |
111 | ||
52a05c30 | 112 | pci_bus_read_config_byte(pdev->bus, PCI_DEVFN(0, 0), |
d721b02f VS |
113 | I845_ESMRAMC, &tmp); |
114 | ||
115 | if (tmp & TSEG_ENABLE) { | |
116 | switch (tmp & I845_TSEG_SIZE_MASK) { | |
117 | case I845_TSEG_SIZE_512K: | |
118 | tseg_size = KB(512); | |
119 | break; | |
120 | case I845_TSEG_SIZE_1M: | |
121 | tseg_size = MB(1); | |
122 | break; | |
123 | } | |
124 | } | |
0ad98c74 | 125 | |
52a05c30 | 126 | pci_bus_read_config_word(pdev->bus, PCI_DEVFN(0, 0), |
0ad98c74 VS |
127 | I865_TOUD, &toud); |
128 | ||
d721b02f | 129 | base = (toud << 16) + tseg_size; |
a9097be4 | 130 | } else if (IS_I85X(dev_priv)) { |
0ad98c74 VS |
131 | u32 tseg_size = 0; |
132 | u32 tom; | |
133 | u8 tmp; | |
134 | ||
52a05c30 | 135 | pci_bus_read_config_byte(pdev->bus, PCI_DEVFN(0, 0), |
0ad98c74 VS |
136 | I85X_ESMRAMC, &tmp); |
137 | ||
138 | if (tmp & TSEG_ENABLE) | |
139 | tseg_size = MB(1); | |
140 | ||
52a05c30 | 141 | pci_bus_read_config_byte(pdev->bus, PCI_DEVFN(0, 1), |
0ad98c74 VS |
142 | I85X_DRB3, &tmp); |
143 | tom = tmp * MB(32); | |
144 | ||
72e96d64 | 145 | base = tom - tseg_size - ggtt->stolen_size; |
2a307c2e | 146 | } else if (IS_I845G(dev_priv)) { |
0ad98c74 VS |
147 | u32 tseg_size = 0; |
148 | u32 tom; | |
149 | u8 tmp; | |
150 | ||
52a05c30 | 151 | pci_bus_read_config_byte(pdev->bus, PCI_DEVFN(0, 0), |
0ad98c74 VS |
152 | I845_ESMRAMC, &tmp); |
153 | ||
154 | if (tmp & TSEG_ENABLE) { | |
155 | switch (tmp & I845_TSEG_SIZE_MASK) { | |
156 | case I845_TSEG_SIZE_512K: | |
157 | tseg_size = KB(512); | |
158 | break; | |
159 | case I845_TSEG_SIZE_1M: | |
160 | tseg_size = MB(1); | |
161 | break; | |
162 | } | |
163 | } | |
164 | ||
52a05c30 | 165 | pci_bus_read_config_byte(pdev->bus, PCI_DEVFN(0, 0), |
0ad98c74 VS |
166 | I830_DRB3, &tmp); |
167 | tom = tmp * MB(32); | |
168 | ||
72e96d64 | 169 | base = tom - tseg_size - ggtt->stolen_size; |
50a0bc90 | 170 | } else if (IS_I830(dev_priv)) { |
0ad98c74 VS |
171 | u32 tseg_size = 0; |
172 | u32 tom; | |
173 | u8 tmp; | |
174 | ||
52a05c30 | 175 | pci_bus_read_config_byte(pdev->bus, PCI_DEVFN(0, 0), |
0ad98c74 VS |
176 | I830_ESMRAMC, &tmp); |
177 | ||
178 | if (tmp & TSEG_ENABLE) { | |
179 | if (tmp & I830_TSEG_SIZE_1M) | |
180 | tseg_size = MB(1); | |
181 | else | |
182 | tseg_size = KB(512); | |
183 | } | |
184 | ||
52a05c30 | 185 | pci_bus_read_config_byte(pdev->bus, PCI_DEVFN(0, 0), |
0ad98c74 VS |
186 | I830_DRB3, &tmp); |
187 | tom = tmp * MB(32); | |
188 | ||
72e96d64 | 189 | base = tom - tseg_size - ggtt->stolen_size; |
e12a2d53 | 190 | } |
9797fbfb | 191 | |
1692cd60 | 192 | if (base == 0 || add_overflows(base, ggtt->stolen_size)) |
eaba1b8f CW |
193 | return 0; |
194 | ||
f1e1c212 | 195 | /* make sure we don't clobber the GTT if it's within stolen memory */ |
73f67aa8 JN |
196 | if (INTEL_GEN(dev_priv) <= 4 && |
197 | !IS_G33(dev_priv) && !IS_PINEVIEW(dev_priv) && !IS_G4X(dev_priv)) { | |
f1e1c212 | 198 | struct { |
c8847387 | 199 | dma_addr_t start, end; |
f1e1c212 | 200 | } stolen[2] = { |
72e96d64 JL |
201 | { .start = base, .end = base + ggtt->stolen_size, }, |
202 | { .start = base, .end = base + ggtt->stolen_size, }, | |
f1e1c212 | 203 | }; |
72e96d64 | 204 | u64 ggtt_start, ggtt_end; |
f1e1c212 | 205 | |
72e96d64 | 206 | ggtt_start = I915_READ(PGTBL_CTL); |
5db94019 | 207 | if (IS_GEN4(dev_priv)) |
72e96d64 JL |
208 | ggtt_start = (ggtt_start & PGTBL_ADDRESS_LO_MASK) | |
209 | (ggtt_start & PGTBL_ADDRESS_HI_MASK) << 28; | |
f1e1c212 | 210 | else |
72e96d64 JL |
211 | ggtt_start &= PGTBL_ADDRESS_LO_MASK; |
212 | ggtt_end = ggtt_start + ggtt_total_entries(ggtt) * 4; | |
f1e1c212 | 213 | |
72e96d64 JL |
214 | if (ggtt_start >= stolen[0].start && ggtt_start < stolen[0].end) |
215 | stolen[0].end = ggtt_start; | |
216 | if (ggtt_end > stolen[1].start && ggtt_end <= stolen[1].end) | |
217 | stolen[1].start = ggtt_end; | |
f1e1c212 VS |
218 | |
219 | /* pick the larger of the two chunks */ | |
220 | if (stolen[0].end - stolen[0].start > | |
221 | stolen[1].end - stolen[1].start) { | |
222 | base = stolen[0].start; | |
72e96d64 | 223 | ggtt->stolen_size = stolen[0].end - stolen[0].start; |
f1e1c212 VS |
224 | } else { |
225 | base = stolen[1].start; | |
72e96d64 | 226 | ggtt->stolen_size = stolen[1].end - stolen[1].start; |
f1e1c212 VS |
227 | } |
228 | ||
229 | if (stolen[0].start != stolen[1].start || | |
230 | stolen[0].end != stolen[1].end) { | |
c8847387 | 231 | dma_addr_t end = base + ggtt->stolen_size - 1; |
920bcd18 | 232 | |
f1e1c212 | 233 | DRM_DEBUG_KMS("GTT within stolen memory at 0x%llx-0x%llx\n", |
72e96d64 JL |
234 | (unsigned long long)ggtt_start, |
235 | (unsigned long long)ggtt_end - 1); | |
c8847387 | 236 | DRM_DEBUG_KMS("Stolen memory adjusted to %pad - %pad\n", |
920bcd18 | 237 | &base, &end); |
f1e1c212 VS |
238 | } |
239 | } | |
240 | ||
241 | ||
eaba1b8f CW |
242 | /* Verify that nothing else uses this physical address. Stolen |
243 | * memory should be reserved by the BIOS and hidden from the | |
244 | * kernel. So if the region is already marked as busy, something | |
245 | * is seriously wrong. | |
246 | */ | |
7ace3d30 | 247 | r = devm_request_mem_region(dev_priv->drm.dev, base, ggtt->stolen_size, |
eaba1b8f CW |
248 | "Graphics Stolen Memory"); |
249 | if (r == NULL) { | |
3617dc96 AG |
250 | /* |
251 | * One more attempt but this time requesting region from | |
252 | * base + 1, as we have seen that this resolves the region | |
253 | * conflict with the PCI Bus. | |
254 | * This is a BIOS w/a: Some BIOS wrap stolen in the root | |
255 | * PCI bus, but have an off-by-one error. Hence retry the | |
256 | * reservation starting from 1 instead of 0. | |
257 | */ | |
7ace3d30 | 258 | r = devm_request_mem_region(dev_priv->drm.dev, base + 1, |
72e96d64 | 259 | ggtt->stolen_size - 1, |
3617dc96 | 260 | "Graphics Stolen Memory"); |
0b6d24c0 DV |
261 | /* |
262 | * GEN3 firmware likes to smash pci bridges into the stolen | |
263 | * range. Apparently this works. | |
264 | */ | |
5db94019 | 265 | if (r == NULL && !IS_GEN3(dev_priv)) { |
c8847387 | 266 | dma_addr_t end = base + ggtt->stolen_size; |
920bcd18 | 267 | |
c8847387 | 268 | DRM_ERROR("conflict detected with stolen region: [%pad - %pad]\n", |
920bcd18 | 269 | &base, &end); |
3617dc96 AG |
270 | base = 0; |
271 | } | |
eaba1b8f CW |
272 | } |
273 | ||
e12a2d53 | 274 | return base; |
9797fbfb CW |
275 | } |
276 | ||
9797fbfb CW |
277 | void i915_gem_cleanup_stolen(struct drm_device *dev) |
278 | { | |
fac5e23e | 279 | struct drm_i915_private *dev_priv = to_i915(dev); |
4d7bb011 | 280 | |
446f8d81 DV |
281 | if (!drm_mm_initialized(&dev_priv->mm.stolen)) |
282 | return; | |
283 | ||
4d7bb011 | 284 | drm_mm_takedown(&dev_priv->mm.stolen); |
9797fbfb CW |
285 | } |
286 | ||
7d316aec | 287 | static void g4x_get_stolen_reserved(struct drm_i915_private *dev_priv, |
c8847387 | 288 | dma_addr_t *base, u32 *size) |
7d316aec | 289 | { |
72e96d64 | 290 | struct i915_ggtt *ggtt = &dev_priv->ggtt; |
7d316aec VS |
291 | uint32_t reg_val = I915_READ(IS_GM45(dev_priv) ? |
292 | CTG_STOLEN_RESERVED : | |
293 | ELK_STOLEN_RESERVED); | |
c8847387 | 294 | dma_addr_t stolen_top = dev_priv->mm.stolen_base + ggtt->stolen_size; |
7d316aec VS |
295 | |
296 | *base = (reg_val & G4X_STOLEN_RESERVED_ADDR2_MASK) << 16; | |
297 | ||
298 | WARN_ON((reg_val & G4X_STOLEN_RESERVED_ADDR1_MASK) < *base); | |
299 | ||
300 | /* On these platforms, the register doesn't have a size field, so the | |
301 | * size is the distance between the base and the top of the stolen | |
302 | * memory. We also have the genuine case where base is zero and there's | |
303 | * nothing reserved. */ | |
304 | if (*base == 0) | |
305 | *size = 0; | |
306 | else | |
307 | *size = stolen_top - *base; | |
308 | } | |
309 | ||
3774eb50 | 310 | static void gen6_get_stolen_reserved(struct drm_i915_private *dev_priv, |
c8847387 | 311 | dma_addr_t *base, u32 *size) |
3774eb50 PZ |
312 | { |
313 | uint32_t reg_val = I915_READ(GEN6_STOLEN_RESERVED); | |
314 | ||
315 | *base = reg_val & GEN6_STOLEN_RESERVED_ADDR_MASK; | |
316 | ||
317 | switch (reg_val & GEN6_STOLEN_RESERVED_SIZE_MASK) { | |
318 | case GEN6_STOLEN_RESERVED_1M: | |
319 | *size = 1024 * 1024; | |
320 | break; | |
321 | case GEN6_STOLEN_RESERVED_512K: | |
322 | *size = 512 * 1024; | |
323 | break; | |
324 | case GEN6_STOLEN_RESERVED_256K: | |
325 | *size = 256 * 1024; | |
326 | break; | |
327 | case GEN6_STOLEN_RESERVED_128K: | |
328 | *size = 128 * 1024; | |
329 | break; | |
330 | default: | |
331 | *size = 1024 * 1024; | |
332 | MISSING_CASE(reg_val & GEN6_STOLEN_RESERVED_SIZE_MASK); | |
333 | } | |
334 | } | |
335 | ||
336 | static void gen7_get_stolen_reserved(struct drm_i915_private *dev_priv, | |
c8847387 | 337 | dma_addr_t *base, u32 *size) |
3774eb50 PZ |
338 | { |
339 | uint32_t reg_val = I915_READ(GEN6_STOLEN_RESERVED); | |
340 | ||
341 | *base = reg_val & GEN7_STOLEN_RESERVED_ADDR_MASK; | |
342 | ||
343 | switch (reg_val & GEN7_STOLEN_RESERVED_SIZE_MASK) { | |
344 | case GEN7_STOLEN_RESERVED_1M: | |
345 | *size = 1024 * 1024; | |
346 | break; | |
347 | case GEN7_STOLEN_RESERVED_256K: | |
348 | *size = 256 * 1024; | |
349 | break; | |
350 | default: | |
351 | *size = 1024 * 1024; | |
352 | MISSING_CASE(reg_val & GEN7_STOLEN_RESERVED_SIZE_MASK); | |
353 | } | |
354 | } | |
355 | ||
9244f858 | 356 | static void chv_get_stolen_reserved(struct drm_i915_private *dev_priv, |
c8847387 | 357 | dma_addr_t *base, u32 *size) |
3774eb50 PZ |
358 | { |
359 | uint32_t reg_val = I915_READ(GEN6_STOLEN_RESERVED); | |
360 | ||
361 | *base = reg_val & GEN6_STOLEN_RESERVED_ADDR_MASK; | |
362 | ||
363 | switch (reg_val & GEN8_STOLEN_RESERVED_SIZE_MASK) { | |
364 | case GEN8_STOLEN_RESERVED_1M: | |
365 | *size = 1024 * 1024; | |
366 | break; | |
367 | case GEN8_STOLEN_RESERVED_2M: | |
368 | *size = 2 * 1024 * 1024; | |
369 | break; | |
370 | case GEN8_STOLEN_RESERVED_4M: | |
371 | *size = 4 * 1024 * 1024; | |
372 | break; | |
373 | case GEN8_STOLEN_RESERVED_8M: | |
374 | *size = 8 * 1024 * 1024; | |
375 | break; | |
376 | default: | |
377 | *size = 8 * 1024 * 1024; | |
378 | MISSING_CASE(reg_val & GEN8_STOLEN_RESERVED_SIZE_MASK); | |
379 | } | |
380 | } | |
381 | ||
382 | static void bdw_get_stolen_reserved(struct drm_i915_private *dev_priv, | |
c8847387 | 383 | dma_addr_t *base, u32 *size) |
3774eb50 | 384 | { |
72e96d64 | 385 | struct i915_ggtt *ggtt = &dev_priv->ggtt; |
3774eb50 | 386 | uint32_t reg_val = I915_READ(GEN6_STOLEN_RESERVED); |
c8847387 | 387 | dma_addr_t stolen_top; |
3774eb50 | 388 | |
72e96d64 | 389 | stolen_top = dev_priv->mm.stolen_base + ggtt->stolen_size; |
3774eb50 PZ |
390 | |
391 | *base = reg_val & GEN6_STOLEN_RESERVED_ADDR_MASK; | |
392 | ||
393 | /* On these platforms, the register doesn't have a size field, so the | |
394 | * size is the distance between the base and the top of the stolen | |
395 | * memory. We also have the genuine case where base is zero and there's | |
396 | * nothing reserved. */ | |
397 | if (*base == 0) | |
398 | *size = 0; | |
399 | else | |
400 | *size = stolen_top - *base; | |
401 | } | |
402 | ||
7ace3d30 | 403 | int i915_gem_init_stolen(struct drm_i915_private *dev_priv) |
9797fbfb | 404 | { |
72e96d64 | 405 | struct i915_ggtt *ggtt = &dev_priv->ggtt; |
c8847387 | 406 | dma_addr_t reserved_base, stolen_top; |
edd1f2fe CW |
407 | u32 reserved_total, reserved_size; |
408 | u32 stolen_usable_start; | |
9797fbfb | 409 | |
92e97d2f PZ |
410 | mutex_init(&dev_priv->mm.stolen_lock); |
411 | ||
04a68a35 CW |
412 | if (intel_vgpu_active(dev_priv)) { |
413 | DRM_INFO("iGVT-g active, disabling use of stolen memory\n"); | |
414 | return 0; | |
415 | } | |
416 | ||
0f4706d2 | 417 | #ifdef CONFIG_INTEL_IOMMU |
7ace3d30 | 418 | if (intel_iommu_gfx_mapped && INTEL_GEN(dev_priv) < 8) { |
0f4706d2 CW |
419 | DRM_INFO("DMAR active, disabling use of stolen memory\n"); |
420 | return 0; | |
421 | } | |
422 | #endif | |
423 | ||
72e96d64 | 424 | if (ggtt->stolen_size == 0) |
6644a4e9 CW |
425 | return 0; |
426 | ||
c8847387 | 427 | dev_priv->mm.stolen_base = i915_stolen_to_dma(dev_priv); |
e12a2d53 CW |
428 | if (dev_priv->mm.stolen_base == 0) |
429 | return 0; | |
430 | ||
72e96d64 | 431 | stolen_top = dev_priv->mm.stolen_base + ggtt->stolen_size; |
46fad808 CW |
432 | reserved_base = 0; |
433 | reserved_size = 0; | |
3774eb50 PZ |
434 | |
435 | switch (INTEL_INFO(dev_priv)->gen) { | |
436 | case 2: | |
437 | case 3: | |
7d316aec | 438 | break; |
3774eb50 | 439 | case 4: |
9beb5fea | 440 | if (IS_G4X(dev_priv)) |
46fad808 CW |
441 | g4x_get_stolen_reserved(dev_priv, |
442 | &reserved_base, &reserved_size); | |
7d316aec | 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: | |
46fad808 CW |
450 | gen6_get_stolen_reserved(dev_priv, |
451 | &reserved_base, &reserved_size); | |
3774eb50 PZ |
452 | break; |
453 | case 7: | |
46fad808 CW |
454 | gen7_get_stolen_reserved(dev_priv, |
455 | &reserved_base, &reserved_size); | |
3774eb50 PZ |
456 | break; |
457 | default: | |
5af7edc5 | 458 | if (IS_LP(dev_priv)) |
46fad808 CW |
459 | chv_get_stolen_reserved(dev_priv, |
460 | &reserved_base, &reserved_size); | |
3774eb50 | 461 | else |
46fad808 CW |
462 | bdw_get_stolen_reserved(dev_priv, |
463 | &reserved_base, &reserved_size); | |
3774eb50 PZ |
464 | break; |
465 | } | |
466 | ||
467 | /* It is possible for the reserved base to be zero, but the register | |
468 | * field for size doesn't have a zero option. */ | |
469 | if (reserved_base == 0) { | |
470 | reserved_size = 0; | |
471 | reserved_base = stolen_top; | |
40bae736 | 472 | } |
c9cddffc | 473 | |
3774eb50 PZ |
474 | if (reserved_base < dev_priv->mm.stolen_base || |
475 | reserved_base + reserved_size > stolen_top) { | |
c8847387 CW |
476 | dma_addr_t reserved_top = reserved_base + reserved_size; |
477 | DRM_DEBUG_KMS("Stolen reserved area [%pad - %pad] outside stolen memory [%pad - %pad]\n", | |
46fad808 CW |
478 | &reserved_base, &reserved_top, |
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 | ||
edd1f2fe | 490 | DRM_DEBUG_KMS("Memory reserved for graphics device: %uK, usable: %uK\n", |
72e96d64 JL |
491 | ggtt->stolen_size >> 10, |
492 | (ggtt->stolen_size - reserved_total) >> 10); | |
897f9ed0 | 493 | |
3c6b29b2 PZ |
494 | stolen_usable_start = 0; |
495 | /* WaSkipStolenMemoryFirstPage:bdw+ */ | |
496 | if (INTEL_GEN(dev_priv) >= 8) | |
497 | stolen_usable_start = 4096; | |
a9da512b | 498 | |
edd1f2fe CW |
499 | ggtt->stolen_usable_size = |
500 | ggtt->stolen_size - reserved_total - stolen_usable_start; | |
3c6b29b2 PZ |
501 | |
502 | /* Basic memrange allocator for stolen space. */ | |
503 | drm_mm_init(&dev_priv->mm.stolen, stolen_usable_start, | |
504 | ggtt->stolen_usable_size); | |
9797fbfb CW |
505 | |
506 | return 0; | |
507 | } | |
0104fdbb CW |
508 | |
509 | static struct sg_table * | |
510 | i915_pages_create_for_stolen(struct drm_device *dev, | |
511 | u32 offset, u32 size) | |
512 | { | |
72e96d64 | 513 | struct drm_i915_private *dev_priv = to_i915(dev); |
0104fdbb CW |
514 | struct sg_table *st; |
515 | struct scatterlist *sg; | |
516 | ||
e8f9ae9b | 517 | GEM_BUG_ON(range_overflows(offset, size, dev_priv->ggtt.stolen_size)); |
0104fdbb CW |
518 | |
519 | /* We hide that we have no struct page backing our stolen object | |
520 | * by wrapping the contiguous physical allocation with a fake | |
521 | * dma mapping in a single scatterlist. | |
522 | */ | |
523 | ||
524 | st = kmalloc(sizeof(*st), GFP_KERNEL); | |
525 | if (st == NULL) | |
43e157fa | 526 | return ERR_PTR(-ENOMEM); |
0104fdbb CW |
527 | |
528 | if (sg_alloc_table(st, 1, GFP_KERNEL)) { | |
529 | kfree(st); | |
43e157fa | 530 | return ERR_PTR(-ENOMEM); |
0104fdbb CW |
531 | } |
532 | ||
533 | sg = st->sgl; | |
ec14ba47 | 534 | sg->offset = 0; |
ed23abdd | 535 | sg->length = size; |
0104fdbb CW |
536 | |
537 | sg_dma_address(sg) = (dma_addr_t)dev_priv->mm.stolen_base + offset; | |
538 | sg_dma_len(sg) = size; | |
539 | ||
540 | return st; | |
541 | } | |
542 | ||
03ac84f1 CW |
543 | static struct sg_table * |
544 | i915_gem_object_get_pages_stolen(struct drm_i915_gem_object *obj) | |
0104fdbb | 545 | { |
03ac84f1 CW |
546 | return i915_pages_create_for_stolen(obj->base.dev, |
547 | obj->stolen->start, | |
548 | obj->stolen->size); | |
0104fdbb CW |
549 | } |
550 | ||
03ac84f1 CW |
551 | static void i915_gem_object_put_pages_stolen(struct drm_i915_gem_object *obj, |
552 | struct sg_table *pages) | |
0104fdbb | 553 | { |
6288c79e | 554 | /* Should only be called from i915_gem_object_release_stolen() */ |
03ac84f1 CW |
555 | sg_free_table(pages); |
556 | kfree(pages); | |
0104fdbb CW |
557 | } |
558 | ||
ef0cf27c CW |
559 | static void |
560 | i915_gem_object_release_stolen(struct drm_i915_gem_object *obj) | |
561 | { | |
fac5e23e | 562 | struct drm_i915_private *dev_priv = to_i915(obj->base.dev); |
6288c79e CW |
563 | struct drm_mm_node *stolen = fetch_and_zero(&obj->stolen); |
564 | ||
565 | GEM_BUG_ON(!stolen); | |
d713fd49 | 566 | |
a4f5ea64 CW |
567 | __i915_gem_object_unpin_pages(obj); |
568 | ||
6288c79e CW |
569 | i915_gem_stolen_remove_node(dev_priv, stolen); |
570 | kfree(stolen); | |
ef0cf27c | 571 | } |
6288c79e | 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 * | |
187685cb | 580 | _i915_gem_object_create_stolen(struct drm_i915_private *dev_priv, |
0104fdbb CW |
581 | struct drm_mm_node *stolen) |
582 | { | |
583 | struct drm_i915_gem_object *obj; | |
584 | ||
187685cb | 585 | obj = i915_gem_object_alloc(dev_priv); |
0104fdbb CW |
586 | if (obj == NULL) |
587 | return NULL; | |
588 | ||
187685cb | 589 | drm_gem_private_object_init(&dev_priv->drm, &obj->base, stolen->size); |
0104fdbb CW |
590 | i915_gem_object_init(obj, &i915_gem_object_stolen_ops); |
591 | ||
0104fdbb | 592 | obj->stolen = stolen; |
d46f1c3f | 593 | obj->base.read_domains = I915_GEM_DOMAIN_CPU | I915_GEM_DOMAIN_GTT; |
187685cb | 594 | obj->cache_level = HAS_LLC(dev_priv) ? I915_CACHE_LLC : I915_CACHE_NONE; |
0104fdbb | 595 | |
03ac84f1 CW |
596 | if (i915_gem_object_pin_pages(obj)) |
597 | goto cleanup; | |
598 | ||
0104fdbb CW |
599 | return obj; |
600 | ||
601 | cleanup: | |
42dcedd4 | 602 | i915_gem_object_free(obj); |
0104fdbb CW |
603 | return NULL; |
604 | } | |
605 | ||
606 | struct drm_i915_gem_object * | |
187685cb | 607 | i915_gem_object_create_stolen(struct drm_i915_private *dev_priv, u32 size) |
0104fdbb | 608 | { |
0104fdbb CW |
609 | struct drm_i915_gem_object *obj; |
610 | struct drm_mm_node *stolen; | |
06e78edf | 611 | int ret; |
0104fdbb | 612 | |
446f8d81 | 613 | if (!drm_mm_initialized(&dev_priv->mm.stolen)) |
0104fdbb CW |
614 | return NULL; |
615 | ||
0104fdbb CW |
616 | if (size == 0) |
617 | return NULL; | |
618 | ||
06e78edf DH |
619 | stolen = kzalloc(sizeof(*stolen), GFP_KERNEL); |
620 | if (!stolen) | |
0104fdbb CW |
621 | return NULL; |
622 | ||
d713fd49 | 623 | ret = i915_gem_stolen_insert_node(dev_priv, stolen, size, 4096); |
06e78edf DH |
624 | if (ret) { |
625 | kfree(stolen); | |
626 | return NULL; | |
627 | } | |
628 | ||
187685cb | 629 | obj = _i915_gem_object_create_stolen(dev_priv, stolen); |
0104fdbb CW |
630 | if (obj) |
631 | return obj; | |
632 | ||
d713fd49 | 633 | i915_gem_stolen_remove_node(dev_priv, stolen); |
06e78edf | 634 | kfree(stolen); |
0104fdbb CW |
635 | return NULL; |
636 | } | |
637 | ||
866d12b4 | 638 | struct drm_i915_gem_object * |
187685cb | 639 | i915_gem_object_create_stolen_for_preallocated(struct drm_i915_private *dev_priv, |
866d12b4 CW |
640 | u32 stolen_offset, |
641 | u32 gtt_offset, | |
642 | u32 size) | |
643 | { | |
72e96d64 | 644 | struct i915_ggtt *ggtt = &dev_priv->ggtt; |
866d12b4 CW |
645 | struct drm_i915_gem_object *obj; |
646 | struct drm_mm_node *stolen; | |
2f633156 | 647 | struct i915_vma *vma; |
b3a070cc | 648 | int ret; |
866d12b4 | 649 | |
446f8d81 | 650 | if (!drm_mm_initialized(&dev_priv->mm.stolen)) |
866d12b4 CW |
651 | return NULL; |
652 | ||
187685cb | 653 | lockdep_assert_held(&dev_priv->drm.struct_mutex); |
12c83d99 | 654 | |
866d12b4 CW |
655 | DRM_DEBUG_KMS("creating preallocated stolen object: stolen_offset=%x, gtt_offset=%x, size=%x\n", |
656 | stolen_offset, gtt_offset, size); | |
657 | ||
658 | /* KISS and expect everything to be page-aligned */ | |
f51455d4 CW |
659 | if (WARN_ON(size == 0) || |
660 | WARN_ON(!IS_ALIGNED(size, I915_GTT_PAGE_SIZE)) || | |
661 | WARN_ON(!IS_ALIGNED(stolen_offset, I915_GTT_MIN_ALIGNMENT))) | |
866d12b4 CW |
662 | return NULL; |
663 | ||
b3a070cc BW |
664 | stolen = kzalloc(sizeof(*stolen), GFP_KERNEL); |
665 | if (!stolen) | |
666 | return NULL; | |
667 | ||
338710e7 BW |
668 | stolen->start = stolen_offset; |
669 | stolen->size = size; | |
92e97d2f | 670 | mutex_lock(&dev_priv->mm.stolen_lock); |
338710e7 | 671 | ret = drm_mm_reserve_node(&dev_priv->mm.stolen, stolen); |
92e97d2f | 672 | mutex_unlock(&dev_priv->mm.stolen_lock); |
b3a070cc | 673 | if (ret) { |
866d12b4 | 674 | DRM_DEBUG_KMS("failed to allocate stolen space\n"); |
b3a070cc | 675 | kfree(stolen); |
866d12b4 CW |
676 | return NULL; |
677 | } | |
678 | ||
187685cb | 679 | obj = _i915_gem_object_create_stolen(dev_priv, stolen); |
866d12b4 CW |
680 | if (obj == NULL) { |
681 | DRM_DEBUG_KMS("failed to allocate stolen object\n"); | |
d713fd49 | 682 | i915_gem_stolen_remove_node(dev_priv, stolen); |
06e78edf | 683 | kfree(stolen); |
866d12b4 CW |
684 | return NULL; |
685 | } | |
686 | ||
3727d55e | 687 | /* Some objects just need physical mem from stolen space */ |
190d6cd5 | 688 | if (gtt_offset == I915_GTT_OFFSET_NONE) |
3727d55e JB |
689 | return obj; |
690 | ||
03ac84f1 CW |
691 | ret = i915_gem_object_pin_pages(obj); |
692 | if (ret) | |
693 | goto err; | |
694 | ||
718659a6 | 695 | vma = i915_vma_instance(obj, &ggtt->base, NULL); |
db473b36 DC |
696 | if (IS_ERR(vma)) { |
697 | ret = PTR_ERR(vma); | |
03ac84f1 | 698 | goto err_pages; |
2f633156 BW |
699 | } |
700 | ||
866d12b4 CW |
701 | /* To simplify the initialisation sequence between KMS and GTT, |
702 | * we allow construction of the stolen object prior to | |
703 | * setting up the GTT space. The actual reservation will occur | |
704 | * later. | |
705 | */ | |
625d988a CW |
706 | ret = i915_gem_gtt_reserve(&ggtt->base, &vma->node, |
707 | size, gtt_offset, obj->cache_level, | |
708 | 0); | |
f6b9d5ca CW |
709 | if (ret) { |
710 | DRM_DEBUG_KMS("failed to allocate stolen GTT space\n"); | |
03ac84f1 | 711 | goto err_pages; |
7c4a7d60 | 712 | } |
866d12b4 | 713 | |
44a0ec0d CW |
714 | GEM_BUG_ON(!drm_mm_node_allocated(&vma->node)); |
715 | ||
a4f5ea64 | 716 | vma->pages = obj->mm.pages; |
3272db53 | 717 | vma->flags |= I915_VMA_GLOBAL_BIND; |
f6b9d5ca | 718 | __i915_vma_set_map_and_fenceable(vma); |
50e046b6 | 719 | list_move_tail(&vma->vm_link, &ggtt->base.inactive_list); |
56cea323 | 720 | list_move_tail(&obj->global_link, &dev_priv->mm.bound_list); |
15717de2 | 721 | obj->bind_count++; |
f6b9d5ca | 722 | |
866d12b4 | 723 | return obj; |
b3a070cc | 724 | |
03ac84f1 CW |
725 | err_pages: |
726 | i915_gem_object_unpin_pages(obj); | |
7c4a7d60 | 727 | err: |
f8c417cd | 728 | i915_gem_object_put(obj); |
b3a070cc | 729 | return NULL; |
866d12b4 | 730 | } |