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29b4e79c85a68764cdba964659a2bdfba63a6731
[deliverable/linux.git] / drivers / gpu / drm / i915 / i915_drv.c
1 /* i915_drv.c -- i830,i845,i855,i865,i915 driver -*- linux-c -*-
2 */
3 /*
4 *
5 * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
6 * All Rights Reserved.
7 *
8 * Permission is hereby granted, free of charge, to any person obtaining a
9 * copy of this software and associated documentation files (the
10 * "Software"), to deal in the Software without restriction, including
11 * without limitation the rights to use, copy, modify, merge, publish,
12 * distribute, sub license, and/or sell copies of the Software, and to
13 * permit persons to whom the Software is furnished to do so, subject to
14 * the following conditions:
15 *
16 * The above copyright notice and this permission notice (including the
17 * next paragraph) shall be included in all copies or substantial portions
18 * of the Software.
19 *
20 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
21 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
22 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
23 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
24 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
25 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
26 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
27 *
28 */
29
30 #include <linux/device.h>
31 #include <linux/acpi.h>
32 #include <drm/drmP.h>
33 #include <drm/i915_drm.h>
34 #include "i915_drv.h"
35 #include "i915_trace.h"
36 #include "intel_drv.h"
37
38 #include <linux/apple-gmux.h>
39 #include <linux/console.h>
40 #include <linux/module.h>
41 #include <linux/pm_runtime.h>
42 #include <linux/vgaarb.h>
43 #include <linux/vga_switcheroo.h>
44 #include <drm/drm_crtc_helper.h>
45
46 static struct drm_driver driver;
47
48 #define GEN_DEFAULT_PIPEOFFSETS \
49 .pipe_offsets = { PIPE_A_OFFSET, PIPE_B_OFFSET, \
50 PIPE_C_OFFSET, PIPE_EDP_OFFSET }, \
51 .trans_offsets = { TRANSCODER_A_OFFSET, TRANSCODER_B_OFFSET, \
52 TRANSCODER_C_OFFSET, TRANSCODER_EDP_OFFSET }, \
53 .palette_offsets = { PALETTE_A_OFFSET, PALETTE_B_OFFSET }
54
55 #define GEN_CHV_PIPEOFFSETS \
56 .pipe_offsets = { PIPE_A_OFFSET, PIPE_B_OFFSET, \
57 CHV_PIPE_C_OFFSET }, \
58 .trans_offsets = { TRANSCODER_A_OFFSET, TRANSCODER_B_OFFSET, \
59 CHV_TRANSCODER_C_OFFSET, }, \
60 .palette_offsets = { PALETTE_A_OFFSET, PALETTE_B_OFFSET, \
61 CHV_PALETTE_C_OFFSET }
62
63 #define CURSOR_OFFSETS \
64 .cursor_offsets = { CURSOR_A_OFFSET, CURSOR_B_OFFSET, CHV_CURSOR_C_OFFSET }
65
66 #define IVB_CURSOR_OFFSETS \
67 .cursor_offsets = { CURSOR_A_OFFSET, IVB_CURSOR_B_OFFSET, IVB_CURSOR_C_OFFSET }
68
69 #define BDW_COLORS \
70 .color = { .degamma_lut_size = 512, .gamma_lut_size = 512 }
71 #define CHV_COLORS \
72 .color = { .degamma_lut_size = 65, .gamma_lut_size = 257 }
73
74 static const struct intel_device_info intel_i830_info = {
75 .gen = 2, .is_mobile = 1, .cursor_needs_physical = 1, .num_pipes = 2,
76 .has_overlay = 1, .overlay_needs_physical = 1,
77 .ring_mask = RENDER_RING,
78 GEN_DEFAULT_PIPEOFFSETS,
79 CURSOR_OFFSETS,
80 };
81
82 static const struct intel_device_info intel_845g_info = {
83 .gen = 2, .num_pipes = 1,
84 .has_overlay = 1, .overlay_needs_physical = 1,
85 .ring_mask = RENDER_RING,
86 GEN_DEFAULT_PIPEOFFSETS,
87 CURSOR_OFFSETS,
88 };
89
90 static const struct intel_device_info intel_i85x_info = {
91 .gen = 2, .is_i85x = 1, .is_mobile = 1, .num_pipes = 2,
92 .cursor_needs_physical = 1,
93 .has_overlay = 1, .overlay_needs_physical = 1,
94 .has_fbc = 1,
95 .ring_mask = RENDER_RING,
96 GEN_DEFAULT_PIPEOFFSETS,
97 CURSOR_OFFSETS,
98 };
99
100 static const struct intel_device_info intel_i865g_info = {
101 .gen = 2, .num_pipes = 1,
102 .has_overlay = 1, .overlay_needs_physical = 1,
103 .ring_mask = RENDER_RING,
104 GEN_DEFAULT_PIPEOFFSETS,
105 CURSOR_OFFSETS,
106 };
107
108 static const struct intel_device_info intel_i915g_info = {
109 .gen = 3, .is_i915g = 1, .cursor_needs_physical = 1, .num_pipes = 2,
110 .has_overlay = 1, .overlay_needs_physical = 1,
111 .ring_mask = RENDER_RING,
112 GEN_DEFAULT_PIPEOFFSETS,
113 CURSOR_OFFSETS,
114 };
115 static const struct intel_device_info intel_i915gm_info = {
116 .gen = 3, .is_mobile = 1, .num_pipes = 2,
117 .cursor_needs_physical = 1,
118 .has_overlay = 1, .overlay_needs_physical = 1,
119 .supports_tv = 1,
120 .has_fbc = 1,
121 .ring_mask = RENDER_RING,
122 GEN_DEFAULT_PIPEOFFSETS,
123 CURSOR_OFFSETS,
124 };
125 static const struct intel_device_info intel_i945g_info = {
126 .gen = 3, .has_hotplug = 1, .cursor_needs_physical = 1, .num_pipes = 2,
127 .has_overlay = 1, .overlay_needs_physical = 1,
128 .ring_mask = RENDER_RING,
129 GEN_DEFAULT_PIPEOFFSETS,
130 CURSOR_OFFSETS,
131 };
132 static const struct intel_device_info intel_i945gm_info = {
133 .gen = 3, .is_i945gm = 1, .is_mobile = 1, .num_pipes = 2,
134 .has_hotplug = 1, .cursor_needs_physical = 1,
135 .has_overlay = 1, .overlay_needs_physical = 1,
136 .supports_tv = 1,
137 .has_fbc = 1,
138 .ring_mask = RENDER_RING,
139 GEN_DEFAULT_PIPEOFFSETS,
140 CURSOR_OFFSETS,
141 };
142
143 static const struct intel_device_info intel_i965g_info = {
144 .gen = 4, .is_broadwater = 1, .num_pipes = 2,
145 .has_hotplug = 1,
146 .has_overlay = 1,
147 .ring_mask = RENDER_RING,
148 GEN_DEFAULT_PIPEOFFSETS,
149 CURSOR_OFFSETS,
150 };
151
152 static const struct intel_device_info intel_i965gm_info = {
153 .gen = 4, .is_crestline = 1, .num_pipes = 2,
154 .is_mobile = 1, .has_fbc = 1, .has_hotplug = 1,
155 .has_overlay = 1,
156 .supports_tv = 1,
157 .ring_mask = RENDER_RING,
158 GEN_DEFAULT_PIPEOFFSETS,
159 CURSOR_OFFSETS,
160 };
161
162 static const struct intel_device_info intel_g33_info = {
163 .gen = 3, .is_g33 = 1, .num_pipes = 2,
164 .need_gfx_hws = 1, .has_hotplug = 1,
165 .has_overlay = 1,
166 .ring_mask = RENDER_RING,
167 GEN_DEFAULT_PIPEOFFSETS,
168 CURSOR_OFFSETS,
169 };
170
171 static const struct intel_device_info intel_g45_info = {
172 .gen = 4, .is_g4x = 1, .need_gfx_hws = 1, .num_pipes = 2,
173 .has_pipe_cxsr = 1, .has_hotplug = 1,
174 .ring_mask = RENDER_RING | BSD_RING,
175 GEN_DEFAULT_PIPEOFFSETS,
176 CURSOR_OFFSETS,
177 };
178
179 static const struct intel_device_info intel_gm45_info = {
180 .gen = 4, .is_g4x = 1, .num_pipes = 2,
181 .is_mobile = 1, .need_gfx_hws = 1, .has_fbc = 1,
182 .has_pipe_cxsr = 1, .has_hotplug = 1,
183 .supports_tv = 1,
184 .ring_mask = RENDER_RING | BSD_RING,
185 GEN_DEFAULT_PIPEOFFSETS,
186 CURSOR_OFFSETS,
187 };
188
189 static const struct intel_device_info intel_pineview_info = {
190 .gen = 3, .is_g33 = 1, .is_pineview = 1, .is_mobile = 1, .num_pipes = 2,
191 .need_gfx_hws = 1, .has_hotplug = 1,
192 .has_overlay = 1,
193 GEN_DEFAULT_PIPEOFFSETS,
194 CURSOR_OFFSETS,
195 };
196
197 static const struct intel_device_info intel_ironlake_d_info = {
198 .gen = 5, .num_pipes = 2,
199 .need_gfx_hws = 1, .has_hotplug = 1,
200 .ring_mask = RENDER_RING | BSD_RING,
201 GEN_DEFAULT_PIPEOFFSETS,
202 CURSOR_OFFSETS,
203 };
204
205 static const struct intel_device_info intel_ironlake_m_info = {
206 .gen = 5, .is_mobile = 1, .num_pipes = 2,
207 .need_gfx_hws = 1, .has_hotplug = 1,
208 .has_fbc = 1,
209 .ring_mask = RENDER_RING | BSD_RING,
210 GEN_DEFAULT_PIPEOFFSETS,
211 CURSOR_OFFSETS,
212 };
213
214 static const struct intel_device_info intel_sandybridge_d_info = {
215 .gen = 6, .num_pipes = 2,
216 .need_gfx_hws = 1, .has_hotplug = 1,
217 .has_fbc = 1,
218 .ring_mask = RENDER_RING | BSD_RING | BLT_RING,
219 .has_llc = 1,
220 GEN_DEFAULT_PIPEOFFSETS,
221 CURSOR_OFFSETS,
222 };
223
224 static const struct intel_device_info intel_sandybridge_m_info = {
225 .gen = 6, .is_mobile = 1, .num_pipes = 2,
226 .need_gfx_hws = 1, .has_hotplug = 1,
227 .has_fbc = 1,
228 .ring_mask = RENDER_RING | BSD_RING | BLT_RING,
229 .has_llc = 1,
230 GEN_DEFAULT_PIPEOFFSETS,
231 CURSOR_OFFSETS,
232 };
233
234 #define GEN7_FEATURES \
235 .gen = 7, .num_pipes = 3, \
236 .need_gfx_hws = 1, .has_hotplug = 1, \
237 .has_fbc = 1, \
238 .ring_mask = RENDER_RING | BSD_RING | BLT_RING, \
239 .has_llc = 1, \
240 GEN_DEFAULT_PIPEOFFSETS, \
241 IVB_CURSOR_OFFSETS
242
243 static const struct intel_device_info intel_ivybridge_d_info = {
244 GEN7_FEATURES,
245 .is_ivybridge = 1,
246 };
247
248 static const struct intel_device_info intel_ivybridge_m_info = {
249 GEN7_FEATURES,
250 .is_ivybridge = 1,
251 .is_mobile = 1,
252 };
253
254 static const struct intel_device_info intel_ivybridge_q_info = {
255 GEN7_FEATURES,
256 .is_ivybridge = 1,
257 .num_pipes = 0, /* legal, last one wins */
258 };
259
260 #define VLV_FEATURES \
261 .gen = 7, .num_pipes = 2, \
262 .need_gfx_hws = 1, .has_hotplug = 1, \
263 .ring_mask = RENDER_RING | BSD_RING | BLT_RING, \
264 .display_mmio_offset = VLV_DISPLAY_BASE, \
265 GEN_DEFAULT_PIPEOFFSETS, \
266 CURSOR_OFFSETS
267
268 static const struct intel_device_info intel_valleyview_m_info = {
269 VLV_FEATURES,
270 .is_valleyview = 1,
271 .is_mobile = 1,
272 };
273
274 static const struct intel_device_info intel_valleyview_d_info = {
275 VLV_FEATURES,
276 .is_valleyview = 1,
277 };
278
279 #define HSW_FEATURES \
280 GEN7_FEATURES, \
281 .ring_mask = RENDER_RING | BSD_RING | BLT_RING | VEBOX_RING, \
282 .has_ddi = 1, \
283 .has_fpga_dbg = 1
284
285 static const struct intel_device_info intel_haswell_d_info = {
286 HSW_FEATURES,
287 .is_haswell = 1,
288 };
289
290 static const struct intel_device_info intel_haswell_m_info = {
291 HSW_FEATURES,
292 .is_haswell = 1,
293 .is_mobile = 1,
294 };
295
296 #define BDW_FEATURES \
297 HSW_FEATURES, \
298 BDW_COLORS
299
300 static const struct intel_device_info intel_broadwell_d_info = {
301 BDW_FEATURES,
302 .gen = 8,
303 };
304
305 static const struct intel_device_info intel_broadwell_m_info = {
306 BDW_FEATURES,
307 .gen = 8, .is_mobile = 1,
308 };
309
310 static const struct intel_device_info intel_broadwell_gt3d_info = {
311 BDW_FEATURES,
312 .gen = 8,
313 .ring_mask = RENDER_RING | BSD_RING | BLT_RING | VEBOX_RING | BSD2_RING,
314 };
315
316 static const struct intel_device_info intel_broadwell_gt3m_info = {
317 BDW_FEATURES,
318 .gen = 8, .is_mobile = 1,
319 .ring_mask = RENDER_RING | BSD_RING | BLT_RING | VEBOX_RING | BSD2_RING,
320 };
321
322 static const struct intel_device_info intel_cherryview_info = {
323 .gen = 8, .num_pipes = 3,
324 .need_gfx_hws = 1, .has_hotplug = 1,
325 .ring_mask = RENDER_RING | BSD_RING | BLT_RING | VEBOX_RING,
326 .is_cherryview = 1,
327 .display_mmio_offset = VLV_DISPLAY_BASE,
328 GEN_CHV_PIPEOFFSETS,
329 CURSOR_OFFSETS,
330 CHV_COLORS,
331 };
332
333 static const struct intel_device_info intel_skylake_info = {
334 BDW_FEATURES,
335 .is_skylake = 1,
336 .gen = 9,
337 };
338
339 static const struct intel_device_info intel_skylake_gt3_info = {
340 BDW_FEATURES,
341 .is_skylake = 1,
342 .gen = 9,
343 .ring_mask = RENDER_RING | BSD_RING | BLT_RING | VEBOX_RING | BSD2_RING,
344 };
345
346 static const struct intel_device_info intel_broxton_info = {
347 .is_preliminary = 1,
348 .is_broxton = 1,
349 .gen = 9,
350 .need_gfx_hws = 1, .has_hotplug = 1,
351 .ring_mask = RENDER_RING | BSD_RING | BLT_RING | VEBOX_RING,
352 .num_pipes = 3,
353 .has_ddi = 1,
354 .has_fpga_dbg = 1,
355 .has_fbc = 1,
356 GEN_DEFAULT_PIPEOFFSETS,
357 IVB_CURSOR_OFFSETS,
358 BDW_COLORS,
359 };
360
361 static const struct intel_device_info intel_kabylake_info = {
362 BDW_FEATURES,
363 .is_kabylake = 1,
364 .gen = 9,
365 };
366
367 static const struct intel_device_info intel_kabylake_gt3_info = {
368 BDW_FEATURES,
369 .is_kabylake = 1,
370 .gen = 9,
371 .ring_mask = RENDER_RING | BSD_RING | BLT_RING | VEBOX_RING | BSD2_RING,
372 };
373
374 /*
375 * Make sure any device matches here are from most specific to most
376 * general. For example, since the Quanta match is based on the subsystem
377 * and subvendor IDs, we need it to come before the more general IVB
378 * PCI ID matches, otherwise we'll use the wrong info struct above.
379 */
380 static const struct pci_device_id pciidlist[] = {
381 INTEL_I830_IDS(&intel_i830_info),
382 INTEL_I845G_IDS(&intel_845g_info),
383 INTEL_I85X_IDS(&intel_i85x_info),
384 INTEL_I865G_IDS(&intel_i865g_info),
385 INTEL_I915G_IDS(&intel_i915g_info),
386 INTEL_I915GM_IDS(&intel_i915gm_info),
387 INTEL_I945G_IDS(&intel_i945g_info),
388 INTEL_I945GM_IDS(&intel_i945gm_info),
389 INTEL_I965G_IDS(&intel_i965g_info),
390 INTEL_G33_IDS(&intel_g33_info),
391 INTEL_I965GM_IDS(&intel_i965gm_info),
392 INTEL_GM45_IDS(&intel_gm45_info),
393 INTEL_G45_IDS(&intel_g45_info),
394 INTEL_PINEVIEW_IDS(&intel_pineview_info),
395 INTEL_IRONLAKE_D_IDS(&intel_ironlake_d_info),
396 INTEL_IRONLAKE_M_IDS(&intel_ironlake_m_info),
397 INTEL_SNB_D_IDS(&intel_sandybridge_d_info),
398 INTEL_SNB_M_IDS(&intel_sandybridge_m_info),
399 INTEL_IVB_Q_IDS(&intel_ivybridge_q_info), /* must be first IVB */
400 INTEL_IVB_M_IDS(&intel_ivybridge_m_info),
401 INTEL_IVB_D_IDS(&intel_ivybridge_d_info),
402 INTEL_HSW_D_IDS(&intel_haswell_d_info),
403 INTEL_HSW_M_IDS(&intel_haswell_m_info),
404 INTEL_VLV_M_IDS(&intel_valleyview_m_info),
405 INTEL_VLV_D_IDS(&intel_valleyview_d_info),
406 INTEL_BDW_GT12M_IDS(&intel_broadwell_m_info),
407 INTEL_BDW_GT12D_IDS(&intel_broadwell_d_info),
408 INTEL_BDW_GT3M_IDS(&intel_broadwell_gt3m_info),
409 INTEL_BDW_GT3D_IDS(&intel_broadwell_gt3d_info),
410 INTEL_CHV_IDS(&intel_cherryview_info),
411 INTEL_SKL_GT1_IDS(&intel_skylake_info),
412 INTEL_SKL_GT2_IDS(&intel_skylake_info),
413 INTEL_SKL_GT3_IDS(&intel_skylake_gt3_info),
414 INTEL_SKL_GT4_IDS(&intel_skylake_gt3_info),
415 INTEL_BXT_IDS(&intel_broxton_info),
416 INTEL_KBL_GT1_IDS(&intel_kabylake_info),
417 INTEL_KBL_GT2_IDS(&intel_kabylake_info),
418 INTEL_KBL_GT3_IDS(&intel_kabylake_gt3_info),
419 INTEL_KBL_GT4_IDS(&intel_kabylake_gt3_info),
420 {0, 0, 0}
421 };
422
423 MODULE_DEVICE_TABLE(pci, pciidlist);
424
425 static enum intel_pch intel_virt_detect_pch(struct drm_device *dev)
426 {
427 enum intel_pch ret = PCH_NOP;
428
429 /*
430 * In a virtualized passthrough environment we can be in a
431 * setup where the ISA bridge is not able to be passed through.
432 * In this case, a south bridge can be emulated and we have to
433 * make an educated guess as to which PCH is really there.
434 */
435
436 if (IS_GEN5(dev)) {
437 ret = PCH_IBX;
438 DRM_DEBUG_KMS("Assuming Ibex Peak PCH\n");
439 } else if (IS_GEN6(dev) || IS_IVYBRIDGE(dev)) {
440 ret = PCH_CPT;
441 DRM_DEBUG_KMS("Assuming CouarPoint PCH\n");
442 } else if (IS_HASWELL(dev) || IS_BROADWELL(dev)) {
443 ret = PCH_LPT;
444 DRM_DEBUG_KMS("Assuming LynxPoint PCH\n");
445 } else if (IS_SKYLAKE(dev) || IS_KABYLAKE(dev)) {
446 ret = PCH_SPT;
447 DRM_DEBUG_KMS("Assuming SunrisePoint PCH\n");
448 }
449
450 return ret;
451 }
452
453 void intel_detect_pch(struct drm_device *dev)
454 {
455 struct drm_i915_private *dev_priv = dev->dev_private;
456 struct pci_dev *pch = NULL;
457
458 /* In all current cases, num_pipes is equivalent to the PCH_NOP setting
459 * (which really amounts to a PCH but no South Display).
460 */
461 if (INTEL_INFO(dev)->num_pipes == 0) {
462 dev_priv->pch_type = PCH_NOP;
463 return;
464 }
465
466 /*
467 * The reason to probe ISA bridge instead of Dev31:Fun0 is to
468 * make graphics device passthrough work easy for VMM, that only
469 * need to expose ISA bridge to let driver know the real hardware
470 * underneath. This is a requirement from virtualization team.
471 *
472 * In some virtualized environments (e.g. XEN), there is irrelevant
473 * ISA bridge in the system. To work reliably, we should scan trhough
474 * all the ISA bridge devices and check for the first match, instead
475 * of only checking the first one.
476 */
477 while ((pch = pci_get_class(PCI_CLASS_BRIDGE_ISA << 8, pch))) {
478 if (pch->vendor == PCI_VENDOR_ID_INTEL) {
479 unsigned short id = pch->device & INTEL_PCH_DEVICE_ID_MASK;
480 dev_priv->pch_id = id;
481
482 if (id == INTEL_PCH_IBX_DEVICE_ID_TYPE) {
483 dev_priv->pch_type = PCH_IBX;
484 DRM_DEBUG_KMS("Found Ibex Peak PCH\n");
485 WARN_ON(!IS_GEN5(dev));
486 } else if (id == INTEL_PCH_CPT_DEVICE_ID_TYPE) {
487 dev_priv->pch_type = PCH_CPT;
488 DRM_DEBUG_KMS("Found CougarPoint PCH\n");
489 WARN_ON(!(IS_GEN6(dev) || IS_IVYBRIDGE(dev)));
490 } else if (id == INTEL_PCH_PPT_DEVICE_ID_TYPE) {
491 /* PantherPoint is CPT compatible */
492 dev_priv->pch_type = PCH_CPT;
493 DRM_DEBUG_KMS("Found PantherPoint PCH\n");
494 WARN_ON(!(IS_GEN6(dev) || IS_IVYBRIDGE(dev)));
495 } else if (id == INTEL_PCH_LPT_DEVICE_ID_TYPE) {
496 dev_priv->pch_type = PCH_LPT;
497 DRM_DEBUG_KMS("Found LynxPoint PCH\n");
498 WARN_ON(!IS_HASWELL(dev) && !IS_BROADWELL(dev));
499 WARN_ON(IS_HSW_ULT(dev) || IS_BDW_ULT(dev));
500 } else if (id == INTEL_PCH_LPT_LP_DEVICE_ID_TYPE) {
501 dev_priv->pch_type = PCH_LPT;
502 DRM_DEBUG_KMS("Found LynxPoint LP PCH\n");
503 WARN_ON(!IS_HASWELL(dev) && !IS_BROADWELL(dev));
504 WARN_ON(!IS_HSW_ULT(dev) && !IS_BDW_ULT(dev));
505 } else if (id == INTEL_PCH_SPT_DEVICE_ID_TYPE) {
506 dev_priv->pch_type = PCH_SPT;
507 DRM_DEBUG_KMS("Found SunrisePoint PCH\n");
508 WARN_ON(!IS_SKYLAKE(dev) &&
509 !IS_KABYLAKE(dev));
510 } else if (id == INTEL_PCH_SPT_LP_DEVICE_ID_TYPE) {
511 dev_priv->pch_type = PCH_SPT;
512 DRM_DEBUG_KMS("Found SunrisePoint LP PCH\n");
513 WARN_ON(!IS_SKYLAKE(dev) &&
514 !IS_KABYLAKE(dev));
515 } else if ((id == INTEL_PCH_P2X_DEVICE_ID_TYPE) ||
516 (id == INTEL_PCH_P3X_DEVICE_ID_TYPE) ||
517 ((id == INTEL_PCH_QEMU_DEVICE_ID_TYPE) &&
518 pch->subsystem_vendor == 0x1af4 &&
519 pch->subsystem_device == 0x1100)) {
520 dev_priv->pch_type = intel_virt_detect_pch(dev);
521 } else
522 continue;
523
524 break;
525 }
526 }
527 if (!pch)
528 DRM_DEBUG_KMS("No PCH found.\n");
529
530 pci_dev_put(pch);
531 }
532
533 bool i915_semaphore_is_enabled(struct drm_device *dev)
534 {
535 if (INTEL_INFO(dev)->gen < 6)
536 return false;
537
538 if (i915.semaphores >= 0)
539 return i915.semaphores;
540
541 /* TODO: make semaphores and Execlists play nicely together */
542 if (i915.enable_execlists)
543 return false;
544
545 /* Until we get further testing... */
546 if (IS_GEN8(dev))
547 return false;
548
549 #ifdef CONFIG_INTEL_IOMMU
550 /* Enable semaphores on SNB when IO remapping is off */
551 if (INTEL_INFO(dev)->gen == 6 && intel_iommu_gfx_mapped)
552 return false;
553 #endif
554
555 return true;
556 }
557
558 static void intel_suspend_encoders(struct drm_i915_private *dev_priv)
559 {
560 struct drm_device *dev = dev_priv->dev;
561 struct intel_encoder *encoder;
562
563 drm_modeset_lock_all(dev);
564 for_each_intel_encoder(dev, encoder)
565 if (encoder->suspend)
566 encoder->suspend(encoder);
567 drm_modeset_unlock_all(dev);
568 }
569
570 static int intel_suspend_complete(struct drm_i915_private *dev_priv);
571 static int vlv_resume_prepare(struct drm_i915_private *dev_priv,
572 bool rpm_resume);
573 static int bxt_resume_prepare(struct drm_i915_private *dev_priv);
574
575 static bool suspend_to_idle(struct drm_i915_private *dev_priv)
576 {
577 #if IS_ENABLED(CONFIG_ACPI_SLEEP)
578 if (acpi_target_system_state() < ACPI_STATE_S3)
579 return true;
580 #endif
581 return false;
582 }
583
584 static int i915_drm_suspend(struct drm_device *dev)
585 {
586 struct drm_i915_private *dev_priv = dev->dev_private;
587 pci_power_t opregion_target_state;
588 int error;
589
590 /* ignore lid events during suspend */
591 mutex_lock(&dev_priv->modeset_restore_lock);
592 dev_priv->modeset_restore = MODESET_SUSPENDED;
593 mutex_unlock(&dev_priv->modeset_restore_lock);
594
595 disable_rpm_wakeref_asserts(dev_priv);
596
597 /* We do a lot of poking in a lot of registers, make sure they work
598 * properly. */
599 intel_display_set_init_power(dev_priv, true);
600
601 drm_kms_helper_poll_disable(dev);
602
603 pci_save_state(dev->pdev);
604
605 error = i915_gem_suspend(dev);
606 if (error) {
607 dev_err(&dev->pdev->dev,
608 "GEM idle failed, resume might fail\n");
609 goto out;
610 }
611
612 intel_guc_suspend(dev);
613
614 intel_suspend_gt_powersave(dev);
615
616 intel_display_suspend(dev);
617
618 intel_dp_mst_suspend(dev);
619
620 intel_runtime_pm_disable_interrupts(dev_priv);
621 intel_hpd_cancel_work(dev_priv);
622
623 intel_suspend_encoders(dev_priv);
624
625 intel_suspend_hw(dev);
626
627 i915_gem_suspend_gtt_mappings(dev);
628
629 i915_save_state(dev);
630
631 opregion_target_state = suspend_to_idle(dev_priv) ? PCI_D1 : PCI_D3cold;
632 intel_opregion_notify_adapter(dev, opregion_target_state);
633
634 intel_uncore_forcewake_reset(dev, false);
635 intel_opregion_fini(dev);
636
637 intel_fbdev_set_suspend(dev, FBINFO_STATE_SUSPENDED, true);
638
639 dev_priv->suspend_count++;
640
641 intel_display_set_init_power(dev_priv, false);
642
643 if (HAS_CSR(dev_priv))
644 flush_work(&dev_priv->csr.work);
645
646 out:
647 enable_rpm_wakeref_asserts(dev_priv);
648
649 return error;
650 }
651
652 static int i915_drm_suspend_late(struct drm_device *drm_dev, bool hibernation)
653 {
654 struct drm_i915_private *dev_priv = drm_dev->dev_private;
655 bool fw_csr;
656 int ret;
657
658 disable_rpm_wakeref_asserts(dev_priv);
659
660 fw_csr = suspend_to_idle(dev_priv) && dev_priv->csr.dmc_payload;
661 /*
662 * In case of firmware assisted context save/restore don't manually
663 * deinit the power domains. This also means the CSR/DMC firmware will
664 * stay active, it will power down any HW resources as required and
665 * also enable deeper system power states that would be blocked if the
666 * firmware was inactive.
667 */
668 if (!fw_csr)
669 intel_power_domains_suspend(dev_priv);
670
671 ret = intel_suspend_complete(dev_priv);
672
673 if (ret) {
674 DRM_ERROR("Suspend complete failed: %d\n", ret);
675 if (!fw_csr)
676 intel_power_domains_init_hw(dev_priv, true);
677
678 goto out;
679 }
680
681 pci_disable_device(drm_dev->pdev);
682 /*
683 * During hibernation on some platforms the BIOS may try to access
684 * the device even though it's already in D3 and hang the machine. So
685 * leave the device in D0 on those platforms and hope the BIOS will
686 * power down the device properly. The issue was seen on multiple old
687 * GENs with different BIOS vendors, so having an explicit blacklist
688 * is inpractical; apply the workaround on everything pre GEN6. The
689 * platforms where the issue was seen:
690 * Lenovo Thinkpad X301, X61s, X60, T60, X41
691 * Fujitsu FSC S7110
692 * Acer Aspire 1830T
693 */
694 if (!(hibernation && INTEL_INFO(dev_priv)->gen < 6))
695 pci_set_power_state(drm_dev->pdev, PCI_D3hot);
696
697 dev_priv->suspended_to_idle = suspend_to_idle(dev_priv);
698
699 out:
700 enable_rpm_wakeref_asserts(dev_priv);
701
702 return ret;
703 }
704
705 int i915_suspend_switcheroo(struct drm_device *dev, pm_message_t state)
706 {
707 int error;
708
709 if (!dev || !dev->dev_private) {
710 DRM_ERROR("dev: %p\n", dev);
711 DRM_ERROR("DRM not initialized, aborting suspend.\n");
712 return -ENODEV;
713 }
714
715 if (WARN_ON_ONCE(state.event != PM_EVENT_SUSPEND &&
716 state.event != PM_EVENT_FREEZE))
717 return -EINVAL;
718
719 if (dev->switch_power_state == DRM_SWITCH_POWER_OFF)
720 return 0;
721
722 error = i915_drm_suspend(dev);
723 if (error)
724 return error;
725
726 return i915_drm_suspend_late(dev, false);
727 }
728
729 static int i915_drm_resume(struct drm_device *dev)
730 {
731 struct drm_i915_private *dev_priv = dev->dev_private;
732
733 disable_rpm_wakeref_asserts(dev_priv);
734
735 mutex_lock(&dev->struct_mutex);
736 i915_gem_restore_gtt_mappings(dev);
737 mutex_unlock(&dev->struct_mutex);
738
739 i915_restore_state(dev);
740 intel_opregion_setup(dev);
741
742 intel_init_pch_refclk(dev);
743 drm_mode_config_reset(dev);
744
745 /*
746 * Interrupts have to be enabled before any batches are run. If not the
747 * GPU will hang. i915_gem_init_hw() will initiate batches to
748 * update/restore the context.
749 *
750 * Modeset enabling in intel_modeset_init_hw() also needs working
751 * interrupts.
752 */
753 intel_runtime_pm_enable_interrupts(dev_priv);
754
755 mutex_lock(&dev->struct_mutex);
756 if (i915_gem_init_hw(dev)) {
757 DRM_ERROR("failed to re-initialize GPU, declaring wedged!\n");
758 atomic_or(I915_WEDGED, &dev_priv->gpu_error.reset_counter);
759 }
760 mutex_unlock(&dev->struct_mutex);
761
762 intel_guc_resume(dev);
763
764 intel_modeset_init_hw(dev);
765
766 spin_lock_irq(&dev_priv->irq_lock);
767 if (dev_priv->display.hpd_irq_setup)
768 dev_priv->display.hpd_irq_setup(dev);
769 spin_unlock_irq(&dev_priv->irq_lock);
770
771 intel_dp_mst_resume(dev);
772
773 intel_display_resume(dev);
774
775 /*
776 * ... but also need to make sure that hotplug processing
777 * doesn't cause havoc. Like in the driver load code we don't
778 * bother with the tiny race here where we might loose hotplug
779 * notifications.
780 * */
781 intel_hpd_init(dev_priv);
782 /* Config may have changed between suspend and resume */
783 drm_helper_hpd_irq_event(dev);
784
785 intel_opregion_init(dev);
786
787 intel_fbdev_set_suspend(dev, FBINFO_STATE_RUNNING, false);
788
789 mutex_lock(&dev_priv->modeset_restore_lock);
790 dev_priv->modeset_restore = MODESET_DONE;
791 mutex_unlock(&dev_priv->modeset_restore_lock);
792
793 intel_opregion_notify_adapter(dev, PCI_D0);
794
795 drm_kms_helper_poll_enable(dev);
796
797 enable_rpm_wakeref_asserts(dev_priv);
798
799 return 0;
800 }
801
802 static int i915_drm_resume_early(struct drm_device *dev)
803 {
804 struct drm_i915_private *dev_priv = dev->dev_private;
805 int ret = 0;
806
807 /*
808 * We have a resume ordering issue with the snd-hda driver also
809 * requiring our device to be power up. Due to the lack of a
810 * parent/child relationship we currently solve this with an early
811 * resume hook.
812 *
813 * FIXME: This should be solved with a special hdmi sink device or
814 * similar so that power domains can be employed.
815 */
816 if (pci_enable_device(dev->pdev)) {
817 ret = -EIO;
818 goto out;
819 }
820
821 pci_set_master(dev->pdev);
822
823 disable_rpm_wakeref_asserts(dev_priv);
824
825 if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
826 ret = vlv_resume_prepare(dev_priv, false);
827 if (ret)
828 DRM_ERROR("Resume prepare failed: %d, continuing anyway\n",
829 ret);
830
831 intel_uncore_early_sanitize(dev, true);
832
833 if (IS_BROXTON(dev))
834 ret = bxt_resume_prepare(dev_priv);
835 else if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv))
836 hsw_disable_pc8(dev_priv);
837
838 intel_uncore_sanitize(dev);
839
840 if (!(dev_priv->suspended_to_idle && dev_priv->csr.dmc_payload))
841 intel_power_domains_init_hw(dev_priv, true);
842
843 out:
844 dev_priv->suspended_to_idle = false;
845
846 enable_rpm_wakeref_asserts(dev_priv);
847
848 return ret;
849 }
850
851 int i915_resume_switcheroo(struct drm_device *dev)
852 {
853 int ret;
854
855 if (dev->switch_power_state == DRM_SWITCH_POWER_OFF)
856 return 0;
857
858 ret = i915_drm_resume_early(dev);
859 if (ret)
860 return ret;
861
862 return i915_drm_resume(dev);
863 }
864
865 /**
866 * i915_reset - reset chip after a hang
867 * @dev: drm device to reset
868 *
869 * Reset the chip. Useful if a hang is detected. Returns zero on successful
870 * reset or otherwise an error code.
871 *
872 * Procedure is fairly simple:
873 * - reset the chip using the reset reg
874 * - re-init context state
875 * - re-init hardware status page
876 * - re-init ring buffer
877 * - re-init interrupt state
878 * - re-init display
879 */
880 int i915_reset(struct drm_device *dev)
881 {
882 struct drm_i915_private *dev_priv = dev->dev_private;
883 bool simulated;
884 int ret;
885
886 intel_reset_gt_powersave(dev);
887
888 mutex_lock(&dev->struct_mutex);
889
890 i915_gem_reset(dev);
891
892 simulated = dev_priv->gpu_error.stop_rings != 0;
893
894 ret = intel_gpu_reset(dev, ALL_ENGINES);
895
896 /* Also reset the gpu hangman. */
897 if (simulated) {
898 DRM_INFO("Simulated gpu hang, resetting stop_rings\n");
899 dev_priv->gpu_error.stop_rings = 0;
900 if (ret == -ENODEV) {
901 DRM_INFO("Reset not implemented, but ignoring "
902 "error for simulated gpu hangs\n");
903 ret = 0;
904 }
905 }
906
907 if (i915_stop_ring_allow_warn(dev_priv))
908 pr_notice("drm/i915: Resetting chip after gpu hang\n");
909
910 if (ret) {
911 DRM_ERROR("Failed to reset chip: %i\n", ret);
912 mutex_unlock(&dev->struct_mutex);
913 return ret;
914 }
915
916 intel_overlay_reset(dev_priv);
917
918 /* Ok, now get things going again... */
919
920 /*
921 * Everything depends on having the GTT running, so we need to start
922 * there. Fortunately we don't need to do this unless we reset the
923 * chip at a PCI level.
924 *
925 * Next we need to restore the context, but we don't use those
926 * yet either...
927 *
928 * Ring buffer needs to be re-initialized in the KMS case, or if X
929 * was running at the time of the reset (i.e. we weren't VT
930 * switched away).
931 */
932
933 /* Used to prevent gem_check_wedged returning -EAGAIN during gpu reset */
934 dev_priv->gpu_error.reload_in_reset = true;
935
936 ret = i915_gem_init_hw(dev);
937
938 dev_priv->gpu_error.reload_in_reset = false;
939
940 mutex_unlock(&dev->struct_mutex);
941 if (ret) {
942 DRM_ERROR("Failed hw init on reset %d\n", ret);
943 return ret;
944 }
945
946 /*
947 * rps/rc6 re-init is necessary to restore state lost after the
948 * reset and the re-install of gt irqs. Skip for ironlake per
949 * previous concerns that it doesn't respond well to some forms
950 * of re-init after reset.
951 */
952 if (INTEL_INFO(dev)->gen > 5)
953 intel_enable_gt_powersave(dev);
954
955 return 0;
956 }
957
958 static int i915_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
959 {
960 struct intel_device_info *intel_info =
961 (struct intel_device_info *) ent->driver_data;
962
963 if (IS_PRELIMINARY_HW(intel_info) && !i915.preliminary_hw_support) {
964 DRM_INFO("This hardware requires preliminary hardware support.\n"
965 "See CONFIG_DRM_I915_PRELIMINARY_HW_SUPPORT, and/or modparam preliminary_hw_support\n");
966 return -ENODEV;
967 }
968
969 /* Only bind to function 0 of the device. Early generations
970 * used function 1 as a placeholder for multi-head. This causes
971 * us confusion instead, especially on the systems where both
972 * functions have the same PCI-ID!
973 */
974 if (PCI_FUNC(pdev->devfn))
975 return -ENODEV;
976
977 /*
978 * apple-gmux is needed on dual GPU MacBook Pro
979 * to probe the panel if we're the inactive GPU.
980 */
981 if (IS_ENABLED(CONFIG_VGA_ARB) && IS_ENABLED(CONFIG_VGA_SWITCHEROO) &&
982 apple_gmux_present() && pdev != vga_default_device() &&
983 !vga_switcheroo_handler_flags())
984 return -EPROBE_DEFER;
985
986 return drm_get_pci_dev(pdev, ent, &driver);
987 }
988
989 static void
990 i915_pci_remove(struct pci_dev *pdev)
991 {
992 struct drm_device *dev = pci_get_drvdata(pdev);
993
994 drm_put_dev(dev);
995 }
996
997 static int i915_pm_suspend(struct device *dev)
998 {
999 struct pci_dev *pdev = to_pci_dev(dev);
1000 struct drm_device *drm_dev = pci_get_drvdata(pdev);
1001
1002 if (!drm_dev || !drm_dev->dev_private) {
1003 dev_err(dev, "DRM not initialized, aborting suspend.\n");
1004 return -ENODEV;
1005 }
1006
1007 if (drm_dev->switch_power_state == DRM_SWITCH_POWER_OFF)
1008 return 0;
1009
1010 return i915_drm_suspend(drm_dev);
1011 }
1012
1013 static int i915_pm_suspend_late(struct device *dev)
1014 {
1015 struct drm_device *drm_dev = dev_to_i915(dev)->dev;
1016
1017 /*
1018 * We have a suspend ordering issue with the snd-hda driver also
1019 * requiring our device to be power up. Due to the lack of a
1020 * parent/child relationship we currently solve this with an late
1021 * suspend hook.
1022 *
1023 * FIXME: This should be solved with a special hdmi sink device or
1024 * similar so that power domains can be employed.
1025 */
1026 if (drm_dev->switch_power_state == DRM_SWITCH_POWER_OFF)
1027 return 0;
1028
1029 return i915_drm_suspend_late(drm_dev, false);
1030 }
1031
1032 static int i915_pm_poweroff_late(struct device *dev)
1033 {
1034 struct drm_device *drm_dev = dev_to_i915(dev)->dev;
1035
1036 if (drm_dev->switch_power_state == DRM_SWITCH_POWER_OFF)
1037 return 0;
1038
1039 return i915_drm_suspend_late(drm_dev, true);
1040 }
1041
1042 static int i915_pm_resume_early(struct device *dev)
1043 {
1044 struct drm_device *drm_dev = dev_to_i915(dev)->dev;
1045
1046 if (drm_dev->switch_power_state == DRM_SWITCH_POWER_OFF)
1047 return 0;
1048
1049 return i915_drm_resume_early(drm_dev);
1050 }
1051
1052 static int i915_pm_resume(struct device *dev)
1053 {
1054 struct drm_device *drm_dev = dev_to_i915(dev)->dev;
1055
1056 if (drm_dev->switch_power_state == DRM_SWITCH_POWER_OFF)
1057 return 0;
1058
1059 return i915_drm_resume(drm_dev);
1060 }
1061
1062 static int hsw_suspend_complete(struct drm_i915_private *dev_priv)
1063 {
1064 hsw_enable_pc8(dev_priv);
1065
1066 return 0;
1067 }
1068
1069 static int bxt_suspend_complete(struct drm_i915_private *dev_priv)
1070 {
1071 struct drm_device *dev = dev_priv->dev;
1072
1073 /* TODO: when DC5 support is added disable DC5 here. */
1074
1075 broxton_ddi_phy_uninit(dev);
1076 broxton_uninit_cdclk(dev);
1077 bxt_enable_dc9(dev_priv);
1078
1079 return 0;
1080 }
1081
1082 static int bxt_resume_prepare(struct drm_i915_private *dev_priv)
1083 {
1084 struct drm_device *dev = dev_priv->dev;
1085
1086 /* TODO: when CSR FW support is added make sure the FW is loaded */
1087
1088 bxt_disable_dc9(dev_priv);
1089
1090 /*
1091 * TODO: when DC5 support is added enable DC5 here if the CSR FW
1092 * is available.
1093 */
1094 broxton_init_cdclk(dev);
1095 broxton_ddi_phy_init(dev);
1096
1097 return 0;
1098 }
1099
1100 /*
1101 * Save all Gunit registers that may be lost after a D3 and a subsequent
1102 * S0i[R123] transition. The list of registers needing a save/restore is
1103 * defined in the VLV2_S0IXRegs document. This documents marks all Gunit
1104 * registers in the following way:
1105 * - Driver: saved/restored by the driver
1106 * - Punit : saved/restored by the Punit firmware
1107 * - No, w/o marking: no need to save/restore, since the register is R/O or
1108 * used internally by the HW in a way that doesn't depend
1109 * keeping the content across a suspend/resume.
1110 * - Debug : used for debugging
1111 *
1112 * We save/restore all registers marked with 'Driver', with the following
1113 * exceptions:
1114 * - Registers out of use, including also registers marked with 'Debug'.
1115 * These have no effect on the driver's operation, so we don't save/restore
1116 * them to reduce the overhead.
1117 * - Registers that are fully setup by an initialization function called from
1118 * the resume path. For example many clock gating and RPS/RC6 registers.
1119 * - Registers that provide the right functionality with their reset defaults.
1120 *
1121 * TODO: Except for registers that based on the above 3 criteria can be safely
1122 * ignored, we save/restore all others, practically treating the HW context as
1123 * a black-box for the driver. Further investigation is needed to reduce the
1124 * saved/restored registers even further, by following the same 3 criteria.
1125 */
1126 static void vlv_save_gunit_s0ix_state(struct drm_i915_private *dev_priv)
1127 {
1128 struct vlv_s0ix_state *s = &dev_priv->vlv_s0ix_state;
1129 int i;
1130
1131 /* GAM 0x4000-0x4770 */
1132 s->wr_watermark = I915_READ(GEN7_WR_WATERMARK);
1133 s->gfx_prio_ctrl = I915_READ(GEN7_GFX_PRIO_CTRL);
1134 s->arb_mode = I915_READ(ARB_MODE);
1135 s->gfx_pend_tlb0 = I915_READ(GEN7_GFX_PEND_TLB0);
1136 s->gfx_pend_tlb1 = I915_READ(GEN7_GFX_PEND_TLB1);
1137
1138 for (i = 0; i < ARRAY_SIZE(s->lra_limits); i++)
1139 s->lra_limits[i] = I915_READ(GEN7_LRA_LIMITS(i));
1140
1141 s->media_max_req_count = I915_READ(GEN7_MEDIA_MAX_REQ_COUNT);
1142 s->gfx_max_req_count = I915_READ(GEN7_GFX_MAX_REQ_COUNT);
1143
1144 s->render_hwsp = I915_READ(RENDER_HWS_PGA_GEN7);
1145 s->ecochk = I915_READ(GAM_ECOCHK);
1146 s->bsd_hwsp = I915_READ(BSD_HWS_PGA_GEN7);
1147 s->blt_hwsp = I915_READ(BLT_HWS_PGA_GEN7);
1148
1149 s->tlb_rd_addr = I915_READ(GEN7_TLB_RD_ADDR);
1150
1151 /* MBC 0x9024-0x91D0, 0x8500 */
1152 s->g3dctl = I915_READ(VLV_G3DCTL);
1153 s->gsckgctl = I915_READ(VLV_GSCKGCTL);
1154 s->mbctl = I915_READ(GEN6_MBCTL);
1155
1156 /* GCP 0x9400-0x9424, 0x8100-0x810C */
1157 s->ucgctl1 = I915_READ(GEN6_UCGCTL1);
1158 s->ucgctl3 = I915_READ(GEN6_UCGCTL3);
1159 s->rcgctl1 = I915_READ(GEN6_RCGCTL1);
1160 s->rcgctl2 = I915_READ(GEN6_RCGCTL2);
1161 s->rstctl = I915_READ(GEN6_RSTCTL);
1162 s->misccpctl = I915_READ(GEN7_MISCCPCTL);
1163
1164 /* GPM 0xA000-0xAA84, 0x8000-0x80FC */
1165 s->gfxpause = I915_READ(GEN6_GFXPAUSE);
1166 s->rpdeuhwtc = I915_READ(GEN6_RPDEUHWTC);
1167 s->rpdeuc = I915_READ(GEN6_RPDEUC);
1168 s->ecobus = I915_READ(ECOBUS);
1169 s->pwrdwnupctl = I915_READ(VLV_PWRDWNUPCTL);
1170 s->rp_down_timeout = I915_READ(GEN6_RP_DOWN_TIMEOUT);
1171 s->rp_deucsw = I915_READ(GEN6_RPDEUCSW);
1172 s->rcubmabdtmr = I915_READ(GEN6_RCUBMABDTMR);
1173 s->rcedata = I915_READ(VLV_RCEDATA);
1174 s->spare2gh = I915_READ(VLV_SPAREG2H);
1175
1176 /* Display CZ domain, 0x4400C-0x4402C, 0x4F000-0x4F11F */
1177 s->gt_imr = I915_READ(GTIMR);
1178 s->gt_ier = I915_READ(GTIER);
1179 s->pm_imr = I915_READ(GEN6_PMIMR);
1180 s->pm_ier = I915_READ(GEN6_PMIER);
1181
1182 for (i = 0; i < ARRAY_SIZE(s->gt_scratch); i++)
1183 s->gt_scratch[i] = I915_READ(GEN7_GT_SCRATCH(i));
1184
1185 /* GT SA CZ domain, 0x100000-0x138124 */
1186 s->tilectl = I915_READ(TILECTL);
1187 s->gt_fifoctl = I915_READ(GTFIFOCTL);
1188 s->gtlc_wake_ctrl = I915_READ(VLV_GTLC_WAKE_CTRL);
1189 s->gtlc_survive = I915_READ(VLV_GTLC_SURVIVABILITY_REG);
1190 s->pmwgicz = I915_READ(VLV_PMWGICZ);
1191
1192 /* Gunit-Display CZ domain, 0x182028-0x1821CF */
1193 s->gu_ctl0 = I915_READ(VLV_GU_CTL0);
1194 s->gu_ctl1 = I915_READ(VLV_GU_CTL1);
1195 s->pcbr = I915_READ(VLV_PCBR);
1196 s->clock_gate_dis2 = I915_READ(VLV_GUNIT_CLOCK_GATE2);
1197
1198 /*
1199 * Not saving any of:
1200 * DFT, 0x9800-0x9EC0
1201 * SARB, 0xB000-0xB1FC
1202 * GAC, 0x5208-0x524C, 0x14000-0x14C000
1203 * PCI CFG
1204 */
1205 }
1206
1207 static void vlv_restore_gunit_s0ix_state(struct drm_i915_private *dev_priv)
1208 {
1209 struct vlv_s0ix_state *s = &dev_priv->vlv_s0ix_state;
1210 u32 val;
1211 int i;
1212
1213 /* GAM 0x4000-0x4770 */
1214 I915_WRITE(GEN7_WR_WATERMARK, s->wr_watermark);
1215 I915_WRITE(GEN7_GFX_PRIO_CTRL, s->gfx_prio_ctrl);
1216 I915_WRITE(ARB_MODE, s->arb_mode | (0xffff << 16));
1217 I915_WRITE(GEN7_GFX_PEND_TLB0, s->gfx_pend_tlb0);
1218 I915_WRITE(GEN7_GFX_PEND_TLB1, s->gfx_pend_tlb1);
1219
1220 for (i = 0; i < ARRAY_SIZE(s->lra_limits); i++)
1221 I915_WRITE(GEN7_LRA_LIMITS(i), s->lra_limits[i]);
1222
1223 I915_WRITE(GEN7_MEDIA_MAX_REQ_COUNT, s->media_max_req_count);
1224 I915_WRITE(GEN7_GFX_MAX_REQ_COUNT, s->gfx_max_req_count);
1225
1226 I915_WRITE(RENDER_HWS_PGA_GEN7, s->render_hwsp);
1227 I915_WRITE(GAM_ECOCHK, s->ecochk);
1228 I915_WRITE(BSD_HWS_PGA_GEN7, s->bsd_hwsp);
1229 I915_WRITE(BLT_HWS_PGA_GEN7, s->blt_hwsp);
1230
1231 I915_WRITE(GEN7_TLB_RD_ADDR, s->tlb_rd_addr);
1232
1233 /* MBC 0x9024-0x91D0, 0x8500 */
1234 I915_WRITE(VLV_G3DCTL, s->g3dctl);
1235 I915_WRITE(VLV_GSCKGCTL, s->gsckgctl);
1236 I915_WRITE(GEN6_MBCTL, s->mbctl);
1237
1238 /* GCP 0x9400-0x9424, 0x8100-0x810C */
1239 I915_WRITE(GEN6_UCGCTL1, s->ucgctl1);
1240 I915_WRITE(GEN6_UCGCTL3, s->ucgctl3);
1241 I915_WRITE(GEN6_RCGCTL1, s->rcgctl1);
1242 I915_WRITE(GEN6_RCGCTL2, s->rcgctl2);
1243 I915_WRITE(GEN6_RSTCTL, s->rstctl);
1244 I915_WRITE(GEN7_MISCCPCTL, s->misccpctl);
1245
1246 /* GPM 0xA000-0xAA84, 0x8000-0x80FC */
1247 I915_WRITE(GEN6_GFXPAUSE, s->gfxpause);
1248 I915_WRITE(GEN6_RPDEUHWTC, s->rpdeuhwtc);
1249 I915_WRITE(GEN6_RPDEUC, s->rpdeuc);
1250 I915_WRITE(ECOBUS, s->ecobus);
1251 I915_WRITE(VLV_PWRDWNUPCTL, s->pwrdwnupctl);
1252 I915_WRITE(GEN6_RP_DOWN_TIMEOUT,s->rp_down_timeout);
1253 I915_WRITE(GEN6_RPDEUCSW, s->rp_deucsw);
1254 I915_WRITE(GEN6_RCUBMABDTMR, s->rcubmabdtmr);
1255 I915_WRITE(VLV_RCEDATA, s->rcedata);
1256 I915_WRITE(VLV_SPAREG2H, s->spare2gh);
1257
1258 /* Display CZ domain, 0x4400C-0x4402C, 0x4F000-0x4F11F */
1259 I915_WRITE(GTIMR, s->gt_imr);
1260 I915_WRITE(GTIER, s->gt_ier);
1261 I915_WRITE(GEN6_PMIMR, s->pm_imr);
1262 I915_WRITE(GEN6_PMIER, s->pm_ier);
1263
1264 for (i = 0; i < ARRAY_SIZE(s->gt_scratch); i++)
1265 I915_WRITE(GEN7_GT_SCRATCH(i), s->gt_scratch[i]);
1266
1267 /* GT SA CZ domain, 0x100000-0x138124 */
1268 I915_WRITE(TILECTL, s->tilectl);
1269 I915_WRITE(GTFIFOCTL, s->gt_fifoctl);
1270 /*
1271 * Preserve the GT allow wake and GFX force clock bit, they are not
1272 * be restored, as they are used to control the s0ix suspend/resume
1273 * sequence by the caller.
1274 */
1275 val = I915_READ(VLV_GTLC_WAKE_CTRL);
1276 val &= VLV_GTLC_ALLOWWAKEREQ;
1277 val |= s->gtlc_wake_ctrl & ~VLV_GTLC_ALLOWWAKEREQ;
1278 I915_WRITE(VLV_GTLC_WAKE_CTRL, val);
1279
1280 val = I915_READ(VLV_GTLC_SURVIVABILITY_REG);
1281 val &= VLV_GFX_CLK_FORCE_ON_BIT;
1282 val |= s->gtlc_survive & ~VLV_GFX_CLK_FORCE_ON_BIT;
1283 I915_WRITE(VLV_GTLC_SURVIVABILITY_REG, val);
1284
1285 I915_WRITE(VLV_PMWGICZ, s->pmwgicz);
1286
1287 /* Gunit-Display CZ domain, 0x182028-0x1821CF */
1288 I915_WRITE(VLV_GU_CTL0, s->gu_ctl0);
1289 I915_WRITE(VLV_GU_CTL1, s->gu_ctl1);
1290 I915_WRITE(VLV_PCBR, s->pcbr);
1291 I915_WRITE(VLV_GUNIT_CLOCK_GATE2, s->clock_gate_dis2);
1292 }
1293
1294 int vlv_force_gfx_clock(struct drm_i915_private *dev_priv, bool force_on)
1295 {
1296 u32 val;
1297 int err;
1298
1299 #define COND (I915_READ(VLV_GTLC_SURVIVABILITY_REG) & VLV_GFX_CLK_STATUS_BIT)
1300
1301 val = I915_READ(VLV_GTLC_SURVIVABILITY_REG);
1302 val &= ~VLV_GFX_CLK_FORCE_ON_BIT;
1303 if (force_on)
1304 val |= VLV_GFX_CLK_FORCE_ON_BIT;
1305 I915_WRITE(VLV_GTLC_SURVIVABILITY_REG, val);
1306
1307 if (!force_on)
1308 return 0;
1309
1310 err = wait_for(COND, 20);
1311 if (err)
1312 DRM_ERROR("timeout waiting for GFX clock force-on (%08x)\n",
1313 I915_READ(VLV_GTLC_SURVIVABILITY_REG));
1314
1315 return err;
1316 #undef COND
1317 }
1318
1319 static int vlv_allow_gt_wake(struct drm_i915_private *dev_priv, bool allow)
1320 {
1321 u32 val;
1322 int err = 0;
1323
1324 val = I915_READ(VLV_GTLC_WAKE_CTRL);
1325 val &= ~VLV_GTLC_ALLOWWAKEREQ;
1326 if (allow)
1327 val |= VLV_GTLC_ALLOWWAKEREQ;
1328 I915_WRITE(VLV_GTLC_WAKE_CTRL, val);
1329 POSTING_READ(VLV_GTLC_WAKE_CTRL);
1330
1331 #define COND (!!(I915_READ(VLV_GTLC_PW_STATUS) & VLV_GTLC_ALLOWWAKEACK) == \
1332 allow)
1333 err = wait_for(COND, 1);
1334 if (err)
1335 DRM_ERROR("timeout disabling GT waking\n");
1336 return err;
1337 #undef COND
1338 }
1339
1340 static int vlv_wait_for_gt_wells(struct drm_i915_private *dev_priv,
1341 bool wait_for_on)
1342 {
1343 u32 mask;
1344 u32 val;
1345 int err;
1346
1347 mask = VLV_GTLC_PW_MEDIA_STATUS_MASK | VLV_GTLC_PW_RENDER_STATUS_MASK;
1348 val = wait_for_on ? mask : 0;
1349 #define COND ((I915_READ(VLV_GTLC_PW_STATUS) & mask) == val)
1350 if (COND)
1351 return 0;
1352
1353 DRM_DEBUG_KMS("waiting for GT wells to go %s (%08x)\n",
1354 onoff(wait_for_on),
1355 I915_READ(VLV_GTLC_PW_STATUS));
1356
1357 /*
1358 * RC6 transitioning can be delayed up to 2 msec (see
1359 * valleyview_enable_rps), use 3 msec for safety.
1360 */
1361 err = wait_for(COND, 3);
1362 if (err)
1363 DRM_ERROR("timeout waiting for GT wells to go %s\n",
1364 onoff(wait_for_on));
1365
1366 return err;
1367 #undef COND
1368 }
1369
1370 static void vlv_check_no_gt_access(struct drm_i915_private *dev_priv)
1371 {
1372 if (!(I915_READ(VLV_GTLC_PW_STATUS) & VLV_GTLC_ALLOWWAKEERR))
1373 return;
1374
1375 DRM_DEBUG_DRIVER("GT register access while GT waking disabled\n");
1376 I915_WRITE(VLV_GTLC_PW_STATUS, VLV_GTLC_ALLOWWAKEERR);
1377 }
1378
1379 static int vlv_suspend_complete(struct drm_i915_private *dev_priv)
1380 {
1381 u32 mask;
1382 int err;
1383
1384 /*
1385 * Bspec defines the following GT well on flags as debug only, so
1386 * don't treat them as hard failures.
1387 */
1388 (void)vlv_wait_for_gt_wells(dev_priv, false);
1389
1390 mask = VLV_GTLC_RENDER_CTX_EXISTS | VLV_GTLC_MEDIA_CTX_EXISTS;
1391 WARN_ON((I915_READ(VLV_GTLC_WAKE_CTRL) & mask) != mask);
1392
1393 vlv_check_no_gt_access(dev_priv);
1394
1395 err = vlv_force_gfx_clock(dev_priv, true);
1396 if (err)
1397 goto err1;
1398
1399 err = vlv_allow_gt_wake(dev_priv, false);
1400 if (err)
1401 goto err2;
1402
1403 if (!IS_CHERRYVIEW(dev_priv))
1404 vlv_save_gunit_s0ix_state(dev_priv);
1405
1406 err = vlv_force_gfx_clock(dev_priv, false);
1407 if (err)
1408 goto err2;
1409
1410 return 0;
1411
1412 err2:
1413 /* For safety always re-enable waking and disable gfx clock forcing */
1414 vlv_allow_gt_wake(dev_priv, true);
1415 err1:
1416 vlv_force_gfx_clock(dev_priv, false);
1417
1418 return err;
1419 }
1420
1421 static int vlv_resume_prepare(struct drm_i915_private *dev_priv,
1422 bool rpm_resume)
1423 {
1424 struct drm_device *dev = dev_priv->dev;
1425 int err;
1426 int ret;
1427
1428 /*
1429 * If any of the steps fail just try to continue, that's the best we
1430 * can do at this point. Return the first error code (which will also
1431 * leave RPM permanently disabled).
1432 */
1433 ret = vlv_force_gfx_clock(dev_priv, true);
1434
1435 if (!IS_CHERRYVIEW(dev_priv))
1436 vlv_restore_gunit_s0ix_state(dev_priv);
1437
1438 err = vlv_allow_gt_wake(dev_priv, true);
1439 if (!ret)
1440 ret = err;
1441
1442 err = vlv_force_gfx_clock(dev_priv, false);
1443 if (!ret)
1444 ret = err;
1445
1446 vlv_check_no_gt_access(dev_priv);
1447
1448 if (rpm_resume) {
1449 intel_init_clock_gating(dev);
1450 i915_gem_restore_fences(dev);
1451 }
1452
1453 return ret;
1454 }
1455
1456 static int intel_runtime_suspend(struct device *device)
1457 {
1458 struct pci_dev *pdev = to_pci_dev(device);
1459 struct drm_device *dev = pci_get_drvdata(pdev);
1460 struct drm_i915_private *dev_priv = dev->dev_private;
1461 int ret;
1462
1463 if (WARN_ON_ONCE(!(dev_priv->rps.enabled && intel_enable_rc6(dev))))
1464 return -ENODEV;
1465
1466 if (WARN_ON_ONCE(!HAS_RUNTIME_PM(dev)))
1467 return -ENODEV;
1468
1469 DRM_DEBUG_KMS("Suspending device\n");
1470
1471 /*
1472 * We could deadlock here in case another thread holding struct_mutex
1473 * calls RPM suspend concurrently, since the RPM suspend will wait
1474 * first for this RPM suspend to finish. In this case the concurrent
1475 * RPM resume will be followed by its RPM suspend counterpart. Still
1476 * for consistency return -EAGAIN, which will reschedule this suspend.
1477 */
1478 if (!mutex_trylock(&dev->struct_mutex)) {
1479 DRM_DEBUG_KMS("device lock contention, deffering suspend\n");
1480 /*
1481 * Bump the expiration timestamp, otherwise the suspend won't
1482 * be rescheduled.
1483 */
1484 pm_runtime_mark_last_busy(device);
1485
1486 return -EAGAIN;
1487 }
1488
1489 disable_rpm_wakeref_asserts(dev_priv);
1490
1491 /*
1492 * We are safe here against re-faults, since the fault handler takes
1493 * an RPM reference.
1494 */
1495 i915_gem_release_all_mmaps(dev_priv);
1496 mutex_unlock(&dev->struct_mutex);
1497
1498 cancel_delayed_work_sync(&dev_priv->gpu_error.hangcheck_work);
1499
1500 intel_guc_suspend(dev);
1501
1502 intel_suspend_gt_powersave(dev);
1503 intel_runtime_pm_disable_interrupts(dev_priv);
1504
1505 ret = intel_suspend_complete(dev_priv);
1506 if (ret) {
1507 DRM_ERROR("Runtime suspend failed, disabling it (%d)\n", ret);
1508 intel_runtime_pm_enable_interrupts(dev_priv);
1509
1510 enable_rpm_wakeref_asserts(dev_priv);
1511
1512 return ret;
1513 }
1514
1515 intel_uncore_forcewake_reset(dev, false);
1516
1517 enable_rpm_wakeref_asserts(dev_priv);
1518 WARN_ON_ONCE(atomic_read(&dev_priv->pm.wakeref_count));
1519
1520 if (intel_uncore_arm_unclaimed_mmio_detection(dev_priv))
1521 DRM_ERROR("Unclaimed access detected prior to suspending\n");
1522
1523 dev_priv->pm.suspended = true;
1524
1525 /*
1526 * FIXME: We really should find a document that references the arguments
1527 * used below!
1528 */
1529 if (IS_BROADWELL(dev)) {
1530 /*
1531 * On Broadwell, if we use PCI_D1 the PCH DDI ports will stop
1532 * being detected, and the call we do at intel_runtime_resume()
1533 * won't be able to restore them. Since PCI_D3hot matches the
1534 * actual specification and appears to be working, use it.
1535 */
1536 intel_opregion_notify_adapter(dev, PCI_D3hot);
1537 } else {
1538 /*
1539 * current versions of firmware which depend on this opregion
1540 * notification have repurposed the D1 definition to mean
1541 * "runtime suspended" vs. what you would normally expect (D3)
1542 * to distinguish it from notifications that might be sent via
1543 * the suspend path.
1544 */
1545 intel_opregion_notify_adapter(dev, PCI_D1);
1546 }
1547
1548 assert_forcewakes_inactive(dev_priv);
1549
1550 DRM_DEBUG_KMS("Device suspended\n");
1551 return 0;
1552 }
1553
1554 static int intel_runtime_resume(struct device *device)
1555 {
1556 struct pci_dev *pdev = to_pci_dev(device);
1557 struct drm_device *dev = pci_get_drvdata(pdev);
1558 struct drm_i915_private *dev_priv = dev->dev_private;
1559 int ret = 0;
1560
1561 if (WARN_ON_ONCE(!HAS_RUNTIME_PM(dev)))
1562 return -ENODEV;
1563
1564 DRM_DEBUG_KMS("Resuming device\n");
1565
1566 WARN_ON_ONCE(atomic_read(&dev_priv->pm.wakeref_count));
1567 disable_rpm_wakeref_asserts(dev_priv);
1568
1569 intel_opregion_notify_adapter(dev, PCI_D0);
1570 dev_priv->pm.suspended = false;
1571 if (intel_uncore_unclaimed_mmio(dev_priv))
1572 DRM_DEBUG_DRIVER("Unclaimed access during suspend, bios?\n");
1573
1574 intel_guc_resume(dev);
1575
1576 if (IS_GEN6(dev_priv))
1577 intel_init_pch_refclk(dev);
1578
1579 if (IS_BROXTON(dev))
1580 ret = bxt_resume_prepare(dev_priv);
1581 else if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv))
1582 hsw_disable_pc8(dev_priv);
1583 else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
1584 ret = vlv_resume_prepare(dev_priv, true);
1585
1586 /*
1587 * No point of rolling back things in case of an error, as the best
1588 * we can do is to hope that things will still work (and disable RPM).
1589 */
1590 i915_gem_init_swizzling(dev);
1591 gen6_update_ring_freq(dev);
1592
1593 intel_runtime_pm_enable_interrupts(dev_priv);
1594
1595 /*
1596 * On VLV/CHV display interrupts are part of the display
1597 * power well, so hpd is reinitialized from there. For
1598 * everyone else do it here.
1599 */
1600 if (!IS_VALLEYVIEW(dev_priv) && !IS_CHERRYVIEW(dev_priv))
1601 intel_hpd_init(dev_priv);
1602
1603 intel_enable_gt_powersave(dev);
1604
1605 enable_rpm_wakeref_asserts(dev_priv);
1606
1607 if (ret)
1608 DRM_ERROR("Runtime resume failed, disabling it (%d)\n", ret);
1609 else
1610 DRM_DEBUG_KMS("Device resumed\n");
1611
1612 return ret;
1613 }
1614
1615 /*
1616 * This function implements common functionality of runtime and system
1617 * suspend sequence.
1618 */
1619 static int intel_suspend_complete(struct drm_i915_private *dev_priv)
1620 {
1621 int ret;
1622
1623 if (IS_BROXTON(dev_priv))
1624 ret = bxt_suspend_complete(dev_priv);
1625 else if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv))
1626 ret = hsw_suspend_complete(dev_priv);
1627 else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
1628 ret = vlv_suspend_complete(dev_priv);
1629 else
1630 ret = 0;
1631
1632 return ret;
1633 }
1634
1635 static const struct dev_pm_ops i915_pm_ops = {
1636 /*
1637 * S0ix (via system suspend) and S3 event handlers [PMSG_SUSPEND,
1638 * PMSG_RESUME]
1639 */
1640 .suspend = i915_pm_suspend,
1641 .suspend_late = i915_pm_suspend_late,
1642 .resume_early = i915_pm_resume_early,
1643 .resume = i915_pm_resume,
1644
1645 /*
1646 * S4 event handlers
1647 * @freeze, @freeze_late : called (1) before creating the
1648 * hibernation image [PMSG_FREEZE] and
1649 * (2) after rebooting, before restoring
1650 * the image [PMSG_QUIESCE]
1651 * @thaw, @thaw_early : called (1) after creating the hibernation
1652 * image, before writing it [PMSG_THAW]
1653 * and (2) after failing to create or
1654 * restore the image [PMSG_RECOVER]
1655 * @poweroff, @poweroff_late: called after writing the hibernation
1656 * image, before rebooting [PMSG_HIBERNATE]
1657 * @restore, @restore_early : called after rebooting and restoring the
1658 * hibernation image [PMSG_RESTORE]
1659 */
1660 .freeze = i915_pm_suspend,
1661 .freeze_late = i915_pm_suspend_late,
1662 .thaw_early = i915_pm_resume_early,
1663 .thaw = i915_pm_resume,
1664 .poweroff = i915_pm_suspend,
1665 .poweroff_late = i915_pm_poweroff_late,
1666 .restore_early = i915_pm_resume_early,
1667 .restore = i915_pm_resume,
1668
1669 /* S0ix (via runtime suspend) event handlers */
1670 .runtime_suspend = intel_runtime_suspend,
1671 .runtime_resume = intel_runtime_resume,
1672 };
1673
1674 static const struct vm_operations_struct i915_gem_vm_ops = {
1675 .fault = i915_gem_fault,
1676 .open = drm_gem_vm_open,
1677 .close = drm_gem_vm_close,
1678 };
1679
1680 static const struct file_operations i915_driver_fops = {
1681 .owner = THIS_MODULE,
1682 .open = drm_open,
1683 .release = drm_release,
1684 .unlocked_ioctl = drm_ioctl,
1685 .mmap = drm_gem_mmap,
1686 .poll = drm_poll,
1687 .read = drm_read,
1688 #ifdef CONFIG_COMPAT
1689 .compat_ioctl = i915_compat_ioctl,
1690 #endif
1691 .llseek = noop_llseek,
1692 };
1693
1694 static struct drm_driver driver = {
1695 /* Don't use MTRRs here; the Xserver or userspace app should
1696 * deal with them for Intel hardware.
1697 */
1698 .driver_features =
1699 DRIVER_HAVE_IRQ | DRIVER_IRQ_SHARED | DRIVER_GEM | DRIVER_PRIME |
1700 DRIVER_RENDER | DRIVER_MODESET,
1701 .load = i915_driver_load,
1702 .unload = i915_driver_unload,
1703 .open = i915_driver_open,
1704 .lastclose = i915_driver_lastclose,
1705 .preclose = i915_driver_preclose,
1706 .postclose = i915_driver_postclose,
1707 .set_busid = drm_pci_set_busid,
1708
1709 #if defined(CONFIG_DEBUG_FS)
1710 .debugfs_init = i915_debugfs_init,
1711 .debugfs_cleanup = i915_debugfs_cleanup,
1712 #endif
1713 .gem_free_object = i915_gem_free_object,
1714 .gem_vm_ops = &i915_gem_vm_ops,
1715
1716 .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
1717 .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
1718 .gem_prime_export = i915_gem_prime_export,
1719 .gem_prime_import = i915_gem_prime_import,
1720
1721 .dumb_create = i915_gem_dumb_create,
1722 .dumb_map_offset = i915_gem_mmap_gtt,
1723 .dumb_destroy = drm_gem_dumb_destroy,
1724 .ioctls = i915_ioctls,
1725 .fops = &i915_driver_fops,
1726 .name = DRIVER_NAME,
1727 .desc = DRIVER_DESC,
1728 .date = DRIVER_DATE,
1729 .major = DRIVER_MAJOR,
1730 .minor = DRIVER_MINOR,
1731 .patchlevel = DRIVER_PATCHLEVEL,
1732 };
1733
1734 static struct pci_driver i915_pci_driver = {
1735 .name = DRIVER_NAME,
1736 .id_table = pciidlist,
1737 .probe = i915_pci_probe,
1738 .remove = i915_pci_remove,
1739 .driver.pm = &i915_pm_ops,
1740 };
1741
1742 static int __init i915_init(void)
1743 {
1744 driver.num_ioctls = i915_max_ioctl;
1745
1746 /*
1747 * Enable KMS by default, unless explicitly overriden by
1748 * either the i915.modeset prarameter or by the
1749 * vga_text_mode_force boot option.
1750 */
1751
1752 if (i915.modeset == 0)
1753 driver.driver_features &= ~DRIVER_MODESET;
1754
1755 if (vgacon_text_force() && i915.modeset == -1)
1756 driver.driver_features &= ~DRIVER_MODESET;
1757
1758 if (!(driver.driver_features & DRIVER_MODESET)) {
1759 /* Silently fail loading to not upset userspace. */
1760 DRM_DEBUG_DRIVER("KMS and UMS disabled.\n");
1761 return 0;
1762 }
1763
1764 if (i915.nuclear_pageflip)
1765 driver.driver_features |= DRIVER_ATOMIC;
1766
1767 return drm_pci_init(&driver, &i915_pci_driver);
1768 }
1769
1770 static void __exit i915_exit(void)
1771 {
1772 if (!(driver.driver_features & DRIVER_MODESET))
1773 return; /* Never loaded a driver. */
1774
1775 drm_pci_exit(&driver, &i915_pci_driver);
1776 }
1777
1778 module_init(i915_init);
1779 module_exit(i915_exit);
1780
1781 MODULE_AUTHOR("Tungsten Graphics, Inc.");
1782 MODULE_AUTHOR("Intel Corporation");
1783
1784 MODULE_DESCRIPTION(DRIVER_DESC);
1785 MODULE_LICENSE("GPL and additional rights");
Linux kernel - Deliverables
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