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drm/i915: add ILK/SNB support to ivybridge_irq_handler
[mirror_ubuntu-bionic-kernel.git] / drivers / gpu / drm / i915 / i915_irq.c
CommitLineData
0d6aa60b 1/* i915_irq.c -- IRQ support for the I915 -*- linux-c -*-
1da177e4 2 */
0d6aa60b 3/*
1da177e4
LT		 4 * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
5 * All Rights Reserved.
bc54fd1a
DA		 6 *
7 * Permission is hereby granted, free of charge, to any person obtaining a
8 * copy of this software and associated documentation files (the
9 * "Software"), to deal in the Software without restriction, including
10 * without limitation the rights to use, copy, modify, merge, publish,
11 * distribute, sub license, and/or sell copies of the Software, and to
12 * permit persons to whom the Software is furnished to do so, subject to
13 * the following conditions:
14 *
15 * The above copyright notice and this permission notice (including the
16 * next paragraph) shall be included in all copies or substantial portions
17 * of the Software.
18 *
19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
20 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
21 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
22 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
23 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
24 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
25 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
26 *
0d6aa60b 27 */
1da177e4 28
a70491cc
JP		 29#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
30
63eeaf38 31#include <linux/sysrq.h>
5a0e3ad6 32#include <linux/slab.h>
760285e7
DH		 33#include <drm/drmP.h>
34#include <drm/i915_drm.h>
1da177e4 35#include "i915_drv.h"
1c5d22f7 36#include "i915_trace.h"
79e53945 37#include "intel_drv.h"
1da177e4 38
e5868a31
EE		 39static const u32 hpd_ibx[] = {
40 [HPD_CRT] = SDE_CRT_HOTPLUG,
41 [HPD_SDVO_B] = SDE_SDVOB_HOTPLUG,
42 [HPD_PORT_B] = SDE_PORTB_HOTPLUG,
43 [HPD_PORT_C] = SDE_PORTC_HOTPLUG,
44 [HPD_PORT_D] = SDE_PORTD_HOTPLUG
45};
46
47static const u32 hpd_cpt[] = {
48 [HPD_CRT] = SDE_CRT_HOTPLUG_CPT,
73c352a2 49 [HPD_SDVO_B] = SDE_SDVOB_HOTPLUG_CPT,
e5868a31
EE		 50 [HPD_PORT_B] = SDE_PORTB_HOTPLUG_CPT,
51 [HPD_PORT_C] = SDE_PORTC_HOTPLUG_CPT,
52 [HPD_PORT_D] = SDE_PORTD_HOTPLUG_CPT
53};
54
55static const u32 hpd_mask_i915[] = {
56 [HPD_CRT] = CRT_HOTPLUG_INT_EN,
57 [HPD_SDVO_B] = SDVOB_HOTPLUG_INT_EN,
58 [HPD_SDVO_C] = SDVOC_HOTPLUG_INT_EN,
59 [HPD_PORT_B] = PORTB_HOTPLUG_INT_EN,
60 [HPD_PORT_C] = PORTC_HOTPLUG_INT_EN,
61 [HPD_PORT_D] = PORTD_HOTPLUG_INT_EN
62};
63
64static const u32 hpd_status_gen4[] = {
65 [HPD_CRT] = CRT_HOTPLUG_INT_STATUS,
66 [HPD_SDVO_B] = SDVOB_HOTPLUG_INT_STATUS_G4X,
67 [HPD_SDVO_C] = SDVOC_HOTPLUG_INT_STATUS_G4X,
68 [HPD_PORT_B] = PORTB_HOTPLUG_INT_STATUS,
69 [HPD_PORT_C] = PORTC_HOTPLUG_INT_STATUS,
70 [HPD_PORT_D] = PORTD_HOTPLUG_INT_STATUS
71};
72
e5868a31
EE		 73static const u32 hpd_status_i915[] = { /* i915 and valleyview are the same */
74 [HPD_CRT] = CRT_HOTPLUG_INT_STATUS,
75 [HPD_SDVO_B] = SDVOB_HOTPLUG_INT_STATUS_I915,
76 [HPD_SDVO_C] = SDVOC_HOTPLUG_INT_STATUS_I915,
77 [HPD_PORT_B] = PORTB_HOTPLUG_INT_STATUS,
78 [HPD_PORT_C] = PORTC_HOTPLUG_INT_STATUS,
79 [HPD_PORT_D] = PORTD_HOTPLUG_INT_STATUS
80};
81
036a4a7d 82/* For display hotplug interrupt */
995b6762 83static void
f2b115e6 84ironlake_enable_display_irq(drm_i915_private_t *dev_priv, u32 mask)
036a4a7d 85{
4bc9d430
DV		 86 assert_spin_locked(&dev_priv->irq_lock);
87
1ec14ad3
CW		 88 if ((dev_priv->irq_mask & mask) != 0) {
89 dev_priv->irq_mask &= ~mask;
90 I915_WRITE(DEIMR, dev_priv->irq_mask);
3143a2bf 91 POSTING_READ(DEIMR);
036a4a7d
ZW		 92 }
93}
94
0ff9800a 95static void
f2b115e6 96ironlake_disable_display_irq(drm_i915_private_t *dev_priv, u32 mask)
036a4a7d 97{
4bc9d430
DV		 98 assert_spin_locked(&dev_priv->irq_lock);
99
1ec14ad3
CW		 100 if ((dev_priv->irq_mask & mask) != mask) {
101 dev_priv->irq_mask |= mask;
102 I915_WRITE(DEIMR, dev_priv->irq_mask);
3143a2bf 103 POSTING_READ(DEIMR);
036a4a7d
ZW		 104 }
105}
106
8664281b
PZ		 107static bool ivb_can_enable_err_int(struct drm_device *dev)
108{
109 struct drm_i915_private *dev_priv = dev->dev_private;
110 struct intel_crtc *crtc;
111 enum pipe pipe;
112
4bc9d430
DV		 113 assert_spin_locked(&dev_priv->irq_lock);
114
8664281b
PZ		 115 for_each_pipe(pipe) {
116 crtc = to_intel_crtc(dev_priv->pipe_to_crtc_mapping[pipe]);
117
118 if (crtc->cpu_fifo_underrun_disabled)
119 return false;
120 }
121
122 return true;
123}
124
125static bool cpt_can_enable_serr_int(struct drm_device *dev)
126{
127 struct drm_i915_private *dev_priv = dev->dev_private;
128 enum pipe pipe;
129 struct intel_crtc *crtc;
130
fee884ed
DV		 131 assert_spin_locked(&dev_priv->irq_lock);
132
8664281b
PZ		 133 for_each_pipe(pipe) {
134 crtc = to_intel_crtc(dev_priv->pipe_to_crtc_mapping[pipe]);
135
136 if (crtc->pch_fifo_underrun_disabled)
137 return false;
138 }
139
140 return true;
141}
142
143static void ironlake_set_fifo_underrun_reporting(struct drm_device *dev,
144 enum pipe pipe, bool enable)
145{
146 struct drm_i915_private *dev_priv = dev->dev_private;
147 uint32_t bit = (pipe == PIPE_A) ? DE_PIPEA_FIFO_UNDERRUN :
148 DE_PIPEB_FIFO_UNDERRUN;
149
150 if (enable)
151 ironlake_enable_display_irq(dev_priv, bit);
152 else
153 ironlake_disable_display_irq(dev_priv, bit);
154}
155
156static void ivybridge_set_fifo_underrun_reporting(struct drm_device *dev,
7336df65 157 enum pipe pipe, bool enable)
8664281b
PZ		 158{
159 struct drm_i915_private *dev_priv = dev->dev_private;
8664281b 160 if (enable) {
7336df65
DV		 161 I915_WRITE(GEN7_ERR_INT, ERR_INT_FIFO_UNDERRUN(pipe));
162
8664281b
PZ		 163 if (!ivb_can_enable_err_int(dev))
164 return;
165
8664281b
PZ		 166 ironlake_enable_display_irq(dev_priv, DE_ERR_INT_IVB);
167 } else {
7336df65
DV		 168 bool was_enabled = !(I915_READ(DEIMR) & DE_ERR_INT_IVB);
169
170 /* Change the state _after_ we've read out the current one. */
8664281b 171 ironlake_disable_display_irq(dev_priv, DE_ERR_INT_IVB);
7336df65
DV		 172
173 if (!was_enabled &&
174 (I915_READ(GEN7_ERR_INT) & ERR_INT_FIFO_UNDERRUN(pipe))) {
175 DRM_DEBUG_KMS("uncleared fifo underrun on pipe %c\n",
176 pipe_name(pipe));
177 }
8664281b
PZ		 178 }
179}
180
fee884ed
DV		 181/**
182 * ibx_display_interrupt_update - update SDEIMR
183 * @dev_priv: driver private
184 * @interrupt_mask: mask of interrupt bits to update
185 * @enabled_irq_mask: mask of interrupt bits to enable
186 */
187static void ibx_display_interrupt_update(struct drm_i915_private *dev_priv,
188 uint32_t interrupt_mask,
189 uint32_t enabled_irq_mask)
190{
191 uint32_t sdeimr = I915_READ(SDEIMR);
192 sdeimr &= ~interrupt_mask;
193 sdeimr |= (~enabled_irq_mask & interrupt_mask);
194
195 assert_spin_locked(&dev_priv->irq_lock);
196
197 I915_WRITE(SDEIMR, sdeimr);
198 POSTING_READ(SDEIMR);
199}
200#define ibx_enable_display_interrupt(dev_priv, bits) \
201 ibx_display_interrupt_update((dev_priv), (bits), (bits))
202#define ibx_disable_display_interrupt(dev_priv, bits) \
203 ibx_display_interrupt_update((dev_priv), (bits), 0)
204
de28075d
DV		 205static void ibx_set_fifo_underrun_reporting(struct drm_device *dev,
206 enum transcoder pch_transcoder,
8664281b
PZ		 207 bool enable)
208{
8664281b 209 struct drm_i915_private *dev_priv = dev->dev_private;
de28075d
DV		 210 uint32_t bit = (pch_transcoder == TRANSCODER_A) ?
211 SDE_TRANSA_FIFO_UNDER : SDE_TRANSB_FIFO_UNDER;
8664281b
PZ		 212
213 if (enable)
fee884ed 214 ibx_enable_display_interrupt(dev_priv, bit);
8664281b 215 else
fee884ed 216 ibx_disable_display_interrupt(dev_priv, bit);
8664281b
PZ		 217}
218
219static void cpt_set_fifo_underrun_reporting(struct drm_device *dev,
220 enum transcoder pch_transcoder,
221 bool enable)
222{
223 struct drm_i915_private *dev_priv = dev->dev_private;
224
225 if (enable) {
1dd246fb
DV		 226 I915_WRITE(SERR_INT,
227 SERR_INT_TRANS_FIFO_UNDERRUN(pch_transcoder));
228
8664281b
PZ		 229 if (!cpt_can_enable_serr_int(dev))
230 return;
231
fee884ed 232 ibx_enable_display_interrupt(dev_priv, SDE_ERROR_CPT);
8664281b 233 } else {
1dd246fb
DV		 234 uint32_t tmp = I915_READ(SERR_INT);
235 bool was_enabled = !(I915_READ(SDEIMR) & SDE_ERROR_CPT);
236
237 /* Change the state _after_ we've read out the current one. */
fee884ed 238 ibx_disable_display_interrupt(dev_priv, SDE_ERROR_CPT);
1dd246fb
DV		 239
240 if (!was_enabled &&
241 (tmp & SERR_INT_TRANS_FIFO_UNDERRUN(pch_transcoder))) {
242 DRM_DEBUG_KMS("uncleared pch fifo underrun on pch transcoder %c\n",
243 transcoder_name(pch_transcoder));
244 }
8664281b 245 }
8664281b
PZ		 246}
247
248/**
249 * intel_set_cpu_fifo_underrun_reporting - enable/disable FIFO underrun messages
250 * @dev: drm device
251 * @pipe: pipe
252 * @enable: true if we want to report FIFO underrun errors, false otherwise
253 *
254 * This function makes us disable or enable CPU fifo underruns for a specific
255 * pipe. Notice that on some Gens (e.g. IVB, HSW), disabling FIFO underrun
256 * reporting for one pipe may also disable all the other CPU error interruts for
257 * the other pipes, due to the fact that there's just one interrupt mask/enable
258 * bit for all the pipes.
259 *
260 * Returns the previous state of underrun reporting.
261 */
262bool intel_set_cpu_fifo_underrun_reporting(struct drm_device *dev,
263 enum pipe pipe, bool enable)
264{
265 struct drm_i915_private *dev_priv = dev->dev_private;
266 struct drm_crtc *crtc = dev_priv->pipe_to_crtc_mapping[pipe];
267 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
268 unsigned long flags;
269 bool ret;
270
271 spin_lock_irqsave(&dev_priv->irq_lock, flags);
272
273 ret = !intel_crtc->cpu_fifo_underrun_disabled;
274
275 if (enable == ret)
276 goto done;
277
278 intel_crtc->cpu_fifo_underrun_disabled = !enable;
279
280 if (IS_GEN5(dev) || IS_GEN6(dev))
281 ironlake_set_fifo_underrun_reporting(dev, pipe, enable);
282 else if (IS_GEN7(dev))
7336df65 283 ivybridge_set_fifo_underrun_reporting(dev, pipe, enable);
8664281b
PZ		 284
285done:
286 spin_unlock_irqrestore(&dev_priv->irq_lock, flags);
287 return ret;
288}
289
290/**
291 * intel_set_pch_fifo_underrun_reporting - enable/disable FIFO underrun messages
292 * @dev: drm device
293 * @pch_transcoder: the PCH transcoder (same as pipe on IVB and older)
294 * @enable: true if we want to report FIFO underrun errors, false otherwise
295 *
296 * This function makes us disable or enable PCH fifo underruns for a specific
297 * PCH transcoder. Notice that on some PCHs (e.g. CPT/PPT), disabling FIFO
298 * underrun reporting for one transcoder may also disable all the other PCH
299 * error interruts for the other transcoders, due to the fact that there's just
300 * one interrupt mask/enable bit for all the transcoders.
301 *
302 * Returns the previous state of underrun reporting.
303 */
304bool intel_set_pch_fifo_underrun_reporting(struct drm_device *dev,
305 enum transcoder pch_transcoder,
306 bool enable)
307{
308 struct drm_i915_private *dev_priv = dev->dev_private;
de28075d
DV		 309 struct drm_crtc *crtc = dev_priv->pipe_to_crtc_mapping[pch_transcoder];
310 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
8664281b
PZ		 311 unsigned long flags;
312 bool ret;
313
de28075d
DV		 314 /*
315 * NOTE: Pre-LPT has a fixed cpu pipe -> pch transcoder mapping, but LPT
316 * has only one pch transcoder A that all pipes can use. To avoid racy
317 * pch transcoder -> pipe lookups from interrupt code simply store the
318 * underrun statistics in crtc A. Since we never expose this anywhere
319 * nor use it outside of the fifo underrun code here using the "wrong"
320 * crtc on LPT won't cause issues.
321 */
8664281b
PZ		 322
323 spin_lock_irqsave(&dev_priv->irq_lock, flags);
324
325 ret = !intel_crtc->pch_fifo_underrun_disabled;
326
327 if (enable == ret)
328 goto done;
329
330 intel_crtc->pch_fifo_underrun_disabled = !enable;
331
332 if (HAS_PCH_IBX(dev))
de28075d 333 ibx_set_fifo_underrun_reporting(dev, pch_transcoder, enable);
8664281b
PZ		 334 else
335 cpt_set_fifo_underrun_reporting(dev, pch_transcoder, enable);
336
337done:
338 spin_unlock_irqrestore(&dev_priv->irq_lock, flags);
339 return ret;
340}
341
342
7c463586
KP		 343void
344i915_enable_pipestat(drm_i915_private_t *dev_priv, int pipe, u32 mask)
345{
46c06a30
VS		 346 u32 reg = PIPESTAT(pipe);
347 u32 pipestat = I915_READ(reg) & 0x7fff0000;
7c463586 348
b79480ba
DV		 349 assert_spin_locked(&dev_priv->irq_lock);
350
46c06a30
VS		 351 if ((pipestat & mask) == mask)
352 return;
353
354 /* Enable the interrupt, clear any pending status */
355 pipestat |= mask | (mask >> 16);
356 I915_WRITE(reg, pipestat);
357 POSTING_READ(reg);
7c463586
KP		 358}
359
360void
361i915_disable_pipestat(drm_i915_private_t *dev_priv, int pipe, u32 mask)
362{
46c06a30
VS		 363 u32 reg = PIPESTAT(pipe);
364 u32 pipestat = I915_READ(reg) & 0x7fff0000;
7c463586 365
b79480ba
DV		 366 assert_spin_locked(&dev_priv->irq_lock);
367
46c06a30
VS		 368 if ((pipestat & mask) == 0)
369 return;
370
371 pipestat &= ~mask;
372 I915_WRITE(reg, pipestat);
373 POSTING_READ(reg);
7c463586
KP		 374}
375
01c66889 376/**
f49e38dd 377 * i915_enable_asle_pipestat - enable ASLE pipestat for OpRegion
01c66889 378 */
f49e38dd 379static void i915_enable_asle_pipestat(struct drm_device *dev)
01c66889 380{
1ec14ad3
CW		 381 drm_i915_private_t *dev_priv = dev->dev_private;
382 unsigned long irqflags;
383
f49e38dd
JN		 384 if (!dev_priv->opregion.asle || !IS_MOBILE(dev))
385 return;
386
1ec14ad3 387 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
01c66889 388
f898780b
JN		 389 i915_enable_pipestat(dev_priv, 1, PIPE_LEGACY_BLC_EVENT_ENABLE);
390 if (INTEL_INFO(dev)->gen >= 4)
391 i915_enable_pipestat(dev_priv, 0, PIPE_LEGACY_BLC_EVENT_ENABLE);
1ec14ad3
CW		 392
393 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
01c66889
ZY		 394}
395
0a3e67a4
JB		 396/**
397 * i915_pipe_enabled - check if a pipe is enabled
398 * @dev: DRM device
399 * @pipe: pipe to check
400 *
401 * Reading certain registers when the pipe is disabled can hang the chip.
402 * Use this routine to make sure the PLL is running and the pipe is active
403 * before reading such registers if unsure.
404 */
405static int
406i915_pipe_enabled(struct drm_device *dev, int pipe)
407{
408 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
702e7a56 409
a01025af
DV		 410 if (drm_core_check_feature(dev, DRIVER_MODESET)) {
411 /* Locking is horribly broken here, but whatever. */
412 struct drm_crtc *crtc = dev_priv->pipe_to_crtc_mapping[pipe];
413 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
71f8ba6b 414
a01025af
DV		 415 return intel_crtc->active;
416 } else {
417 return I915_READ(PIPECONF(pipe)) & PIPECONF_ENABLE;
418 }
0a3e67a4
JB		 419}
420
42f52ef8
KP		 421/* Called from drm generic code, passed a 'crtc', which
422 * we use as a pipe index
423 */
f71d4af4 424static u32 i915_get_vblank_counter(struct drm_device *dev, int pipe)
0a3e67a4
JB		 425{
426 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
427 unsigned long high_frame;
428 unsigned long low_frame;
5eddb70b 429 u32 high1, high2, low;
0a3e67a4
JB		 430
431 if (!i915_pipe_enabled(dev, pipe)) {
44d98a61 432 DRM_DEBUG_DRIVER("trying to get vblank count for disabled "
9db4a9c7 433 "pipe %c\n", pipe_name(pipe));
0a3e67a4
JB		 434 return 0;
435 }
436
9db4a9c7
JB		 437 high_frame = PIPEFRAME(pipe);
438 low_frame = PIPEFRAMEPIXEL(pipe);
5eddb70b 439
0a3e67a4
JB		 440 /*
441 * High & low register fields aren't synchronized, so make sure
442 * we get a low value that's stable across two reads of the high
443 * register.
444 */
445 do {
5eddb70b
CW		 446 high1 = I915_READ(high_frame) & PIPE_FRAME_HIGH_MASK;
447 low = I915_READ(low_frame) & PIPE_FRAME_LOW_MASK;
448 high2 = I915_READ(high_frame) & PIPE_FRAME_HIGH_MASK;
0a3e67a4
JB		 449 } while (high1 != high2);
450
5eddb70b
CW		 451 high1 >>= PIPE_FRAME_HIGH_SHIFT;
452 low >>= PIPE_FRAME_LOW_SHIFT;
453 return (high1 << 8) | low;
0a3e67a4
JB		 454}
455
f71d4af4 456static u32 gm45_get_vblank_counter(struct drm_device *dev, int pipe)
9880b7a5
JB		 457{
458 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
9db4a9c7 459 int reg = PIPE_FRMCOUNT_GM45(pipe);
9880b7a5
JB		 460
461 if (!i915_pipe_enabled(dev, pipe)) {
44d98a61 462 DRM_DEBUG_DRIVER("trying to get vblank count for disabled "
9db4a9c7 463 "pipe %c\n", pipe_name(pipe));
9880b7a5
JB		 464 return 0;
465 }
466
467 return I915_READ(reg);
468}
469
f71d4af4 470static int i915_get_crtc_scanoutpos(struct drm_device *dev, int pipe,
0af7e4df
MK		 471 int *vpos, int *hpos)
472{
473 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
474 u32 vbl = 0, position = 0;
475 int vbl_start, vbl_end, htotal, vtotal;
476 bool in_vbl = true;
477 int ret = 0;
fe2b8f9d
PZ		 478 enum transcoder cpu_transcoder = intel_pipe_to_cpu_transcoder(dev_priv,
479 pipe);
0af7e4df
MK		 480
481 if (!i915_pipe_enabled(dev, pipe)) {
482 DRM_DEBUG_DRIVER("trying to get scanoutpos for disabled "
9db4a9c7 483 "pipe %c\n", pipe_name(pipe));
0af7e4df
MK		 484 return 0;
485 }
486
487 /* Get vtotal. */
fe2b8f9d 488 vtotal = 1 + ((I915_READ(VTOTAL(cpu_transcoder)) >> 16) & 0x1fff);
0af7e4df
MK		 489
490 if (INTEL_INFO(dev)->gen >= 4) {
491 /* No obvious pixelcount register. Only query vertical
492 * scanout position from Display scan line register.
493 */
494 position = I915_READ(PIPEDSL(pipe));
495
496 /* Decode into vertical scanout position. Don't have
497 * horizontal scanout position.
498 */
499 *vpos = position & 0x1fff;
500 *hpos = 0;
501 } else {
502 /* Have access to pixelcount since start of frame.
503 * We can split this into vertical and horizontal
504 * scanout position.
505 */
506 position = (I915_READ(PIPEFRAMEPIXEL(pipe)) & PIPE_PIXEL_MASK) >> PIPE_PIXEL_SHIFT;
507
fe2b8f9d 508 htotal = 1 + ((I915_READ(HTOTAL(cpu_transcoder)) >> 16) & 0x1fff);
0af7e4df
MK		 509 *vpos = position / htotal;
510 *hpos = position - (*vpos * htotal);
511 }
512
513 /* Query vblank area. */
fe2b8f9d 514 vbl = I915_READ(VBLANK(cpu_transcoder));
0af7e4df
MK		 515
516 /* Test position against vblank region. */
517 vbl_start = vbl & 0x1fff;
518 vbl_end = (vbl >> 16) & 0x1fff;
519
520 if ((*vpos < vbl_start) || (*vpos > vbl_end))
521 in_vbl = false;
522
523 /* Inside "upper part" of vblank area? Apply corrective offset: */
524 if (in_vbl && (*vpos >= vbl_start))
525 *vpos = *vpos - vtotal;
526
527 /* Readouts valid? */
528 if (vbl > 0)
529 ret |= DRM_SCANOUTPOS_VALID | DRM_SCANOUTPOS_ACCURATE;
530
531 /* In vblank? */
532 if (in_vbl)
533 ret |= DRM_SCANOUTPOS_INVBL;
534
535 return ret;
536}
537
f71d4af4 538static int i915_get_vblank_timestamp(struct drm_device *dev, int pipe,
0af7e4df
MK		 539 int *max_error,
540 struct timeval *vblank_time,
541 unsigned flags)
542{
4041b853 543 struct drm_crtc *crtc;
0af7e4df 544
7eb552ae 545 if (pipe < 0 || pipe >= INTEL_INFO(dev)->num_pipes) {
4041b853 546 DRM_ERROR("Invalid crtc %d\n", pipe);
0af7e4df
MK		 547 return -EINVAL;
548 }
549
550 /* Get drm_crtc to timestamp: */
4041b853
CW		 551 crtc = intel_get_crtc_for_pipe(dev, pipe);
552 if (crtc == NULL) {
553 DRM_ERROR("Invalid crtc %d\n", pipe);
554 return -EINVAL;
555 }
556
557 if (!crtc->enabled) {
558 DRM_DEBUG_KMS("crtc %d is disabled\n", pipe);
559 return -EBUSY;
560 }
0af7e4df
MK		 561
562 /* Helper routine in DRM core does all the work: */
4041b853
CW		 563 return drm_calc_vbltimestamp_from_scanoutpos(dev, pipe, max_error,
564 vblank_time, flags,
565 crtc);
0af7e4df
MK		 566}
567
321a1b30
EE		 568static int intel_hpd_irq_event(struct drm_device *dev, struct drm_connector *connector)
569{
570 enum drm_connector_status old_status;
571
572 WARN_ON(!mutex_is_locked(&dev->mode_config.mutex));
573 old_status = connector->status;
574
575 connector->status = connector->funcs->detect(connector, false);
576 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] status updated from %d to %d\n",
577 connector->base.id,
578 drm_get_connector_name(connector),
579 old_status, connector->status);
580 return (old_status != connector->status);
581}
582
5ca58282
JB		 583/*
584 * Handle hotplug events outside the interrupt handler proper.
585 */
ac4c16c5
EE		 586#define I915_REENABLE_HOTPLUG_DELAY (2*60*1000)
587
5ca58282
JB		 588static void i915_hotplug_work_func(struct work_struct *work)
589{
590 drm_i915_private_t *dev_priv = container_of(work, drm_i915_private_t,
591 hotplug_work);
592 struct drm_device *dev = dev_priv->dev;
c31c4ba3 593 struct drm_mode_config *mode_config = &dev->mode_config;
cd569aed
EE		 594 struct intel_connector *intel_connector;
595 struct intel_encoder *intel_encoder;
596 struct drm_connector *connector;
597 unsigned long irqflags;
598 bool hpd_disabled = false;
321a1b30 599 bool changed = false;
142e2398 600 u32 hpd_event_bits;
4ef69c7a 601
52d7eced
DV		 602 /* HPD irq before everything is fully set up. */
603 if (!dev_priv->enable_hotplug_processing)
604 return;
605
a65e34c7 606 mutex_lock(&mode_config->mutex);
e67189ab
JB		 607 DRM_DEBUG_KMS("running encoder hotplug functions\n");
608
cd569aed 609 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
142e2398
EE		 610
611 hpd_event_bits = dev_priv->hpd_event_bits;
612 dev_priv->hpd_event_bits = 0;
cd569aed
EE		 613 list_for_each_entry(connector, &mode_config->connector_list, head) {
614 intel_connector = to_intel_connector(connector);
615 intel_encoder = intel_connector->encoder;
616 if (intel_encoder->hpd_pin > HPD_NONE &&
617 dev_priv->hpd_stats[intel_encoder->hpd_pin].hpd_mark == HPD_MARK_DISABLED &&
618 connector->polled == DRM_CONNECTOR_POLL_HPD) {
619 DRM_INFO("HPD interrupt storm detected on connector %s: "
620 "switching from hotplug detection to polling\n",
621 drm_get_connector_name(connector));
622 dev_priv->hpd_stats[intel_encoder->hpd_pin].hpd_mark = HPD_DISABLED;
623 connector->polled = DRM_CONNECTOR_POLL_CONNECT
624 | DRM_CONNECTOR_POLL_DISCONNECT;
625 hpd_disabled = true;
626 }
142e2398
EE		 627 if (hpd_event_bits & (1 << intel_encoder->hpd_pin)) {
628 DRM_DEBUG_KMS("Connector %s (pin %i) received hotplug event.\n",
629 drm_get_connector_name(connector), intel_encoder->hpd_pin);
630 }
cd569aed
EE		 631 }
632 /* if there were no outputs to poll, poll was disabled,
633 * therefore make sure it's enabled when disabling HPD on
634 * some connectors */
ac4c16c5 635 if (hpd_disabled) {
cd569aed 636 drm_kms_helper_poll_enable(dev);
ac4c16c5
EE		 637 mod_timer(&dev_priv->hotplug_reenable_timer,
638 jiffies + msecs_to_jiffies(I915_REENABLE_HOTPLUG_DELAY));
639 }
cd569aed
EE		 640
641 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
642
321a1b30
EE		 643 list_for_each_entry(connector, &mode_config->connector_list, head) {
644 intel_connector = to_intel_connector(connector);
645 intel_encoder = intel_connector->encoder;
646 if (hpd_event_bits & (1 << intel_encoder->hpd_pin)) {
647 if (intel_encoder->hot_plug)
648 intel_encoder->hot_plug(intel_encoder);
649 if (intel_hpd_irq_event(dev, connector))
650 changed = true;
651 }
652 }
40ee3381
KP		 653 mutex_unlock(&mode_config->mutex);
654
321a1b30
EE		 655 if (changed)
656 drm_kms_helper_hotplug_event(dev);
5ca58282
JB		 657}
658
d0ecd7e2 659static void ironlake_rps_change_irq_handler(struct drm_device *dev)
f97108d1
JB		 660{
661 drm_i915_private_t *dev_priv = dev->dev_private;
b5b72e89 662 u32 busy_up, busy_down, max_avg, min_avg;
9270388e 663 u8 new_delay;
9270388e 664
d0ecd7e2 665 spin_lock(&mchdev_lock);
f97108d1 666
73edd18f
DV		 667 I915_WRITE16(MEMINTRSTS, I915_READ(MEMINTRSTS));
668
20e4d407 669 new_delay = dev_priv->ips.cur_delay;
9270388e 670
7648fa99 671 I915_WRITE16(MEMINTRSTS, MEMINT_EVAL_CHG);
b5b72e89
MG		 672 busy_up = I915_READ(RCPREVBSYTUPAVG);
673 busy_down = I915_READ(RCPREVBSYTDNAVG);
f97108d1
JB		 674 max_avg = I915_READ(RCBMAXAVG);
675 min_avg = I915_READ(RCBMINAVG);
676
677 /* Handle RCS change request from hw */
b5b72e89 678 if (busy_up > max_avg) {
20e4d407
DV		 679 if (dev_priv->ips.cur_delay != dev_priv->ips.max_delay)
680 new_delay = dev_priv->ips.cur_delay - 1;
681 if (new_delay < dev_priv->ips.max_delay)
682 new_delay = dev_priv->ips.max_delay;
b5b72e89 683 } else if (busy_down < min_avg) {
20e4d407
DV		 684 if (dev_priv->ips.cur_delay != dev_priv->ips.min_delay)
685 new_delay = dev_priv->ips.cur_delay + 1;
686 if (new_delay > dev_priv->ips.min_delay)
687 new_delay = dev_priv->ips.min_delay;
f97108d1
JB		 688 }
689
7648fa99 690 if (ironlake_set_drps(dev, new_delay))
20e4d407 691 dev_priv->ips.cur_delay = new_delay;
f97108d1 692
d0ecd7e2 693 spin_unlock(&mchdev_lock);
9270388e 694
f97108d1
JB		 695 return;
696}
697
549f7365
CW		 698static void notify_ring(struct drm_device *dev,
699 struct intel_ring_buffer *ring)
700{
475553de
CW		 701 if (ring->obj == NULL)
702 return;
703
b2eadbc8 704 trace_i915_gem_request_complete(ring, ring->get_seqno(ring, false));
9862e600 705
549f7365 706 wake_up_all(&ring->irq_queue);
10cd45b6 707 i915_queue_hangcheck(dev);
549f7365
CW		 708}
709
4912d041 710static void gen6_pm_rps_work(struct work_struct *work)
3b8d8d91 711{
4912d041 712 drm_i915_private_t *dev_priv = container_of(work, drm_i915_private_t,
c6a828d3 713 rps.work);
4912d041 714 u32 pm_iir, pm_imr;
7b9e0ae6 715 u8 new_delay;
4912d041 716
59cdb63d 717 spin_lock_irq(&dev_priv->irq_lock);
c6a828d3
DV		 718 pm_iir = dev_priv->rps.pm_iir;
719 dev_priv->rps.pm_iir = 0;
4912d041 720 pm_imr = I915_READ(GEN6_PMIMR);
4848405c
BW		 721 /* Make sure not to corrupt PMIMR state used by ringbuffer code */
722 I915_WRITE(GEN6_PMIMR, pm_imr & ~GEN6_PM_RPS_EVENTS);
59cdb63d 723 spin_unlock_irq(&dev_priv->irq_lock);
3b8d8d91 724
4848405c 725 if ((pm_iir & GEN6_PM_RPS_EVENTS) == 0)
3b8d8d91
JB		 726 return;
727
4fc688ce 728 mutex_lock(&dev_priv->rps.hw_lock);
7b9e0ae6 729
7425034a 730 if (pm_iir & GEN6_PM_RP_UP_THRESHOLD) {
c6a828d3 731 new_delay = dev_priv->rps.cur_delay + 1;
7425034a
VS		 732
733 /*
734 * For better performance, jump directly
735 * to RPe if we're below it.
736 */
737 if (IS_VALLEYVIEW(dev_priv->dev) &&
738 dev_priv->rps.cur_delay < dev_priv->rps.rpe_delay)
739 new_delay = dev_priv->rps.rpe_delay;
740 } else
c6a828d3 741 new_delay = dev_priv->rps.cur_delay - 1;
3b8d8d91 742
79249636
BW		 743 /* sysfs frequency interfaces may have snuck in while servicing the
744 * interrupt
745 */
d8289c9e
VS		 746 if (new_delay >= dev_priv->rps.min_delay &&
747 new_delay <= dev_priv->rps.max_delay) {
0a073b84
JB		 748 if (IS_VALLEYVIEW(dev_priv->dev))
749 valleyview_set_rps(dev_priv->dev, new_delay);
750 else
751 gen6_set_rps(dev_priv->dev, new_delay);
79249636 752 }
3b8d8d91 753
52ceb908
JB		 754 if (IS_VALLEYVIEW(dev_priv->dev)) {
755 /*
756 * On VLV, when we enter RC6 we may not be at the minimum
757 * voltage level, so arm a timer to check. It should only
758 * fire when there's activity or once after we've entered
759 * RC6, and then won't be re-armed until the next RPS interrupt.
760 */
761 mod_delayed_work(dev_priv->wq, &dev_priv->rps.vlv_work,
762 msecs_to_jiffies(100));
763 }
764
4fc688ce 765 mutex_unlock(&dev_priv->rps.hw_lock);
3b8d8d91
JB		 766}
767
e3689190
BW		 768
769/**
770 * ivybridge_parity_work - Workqueue called when a parity error interrupt
771 * occurred.
772 * @work: workqueue struct
773 *
774 * Doesn't actually do anything except notify userspace. As a consequence of
775 * this event, userspace should try to remap the bad rows since statistically
776 * it is likely the same row is more likely to go bad again.
777 */
778static void ivybridge_parity_work(struct work_struct *work)
779{
780 drm_i915_private_t *dev_priv = container_of(work, drm_i915_private_t,
a4da4fa4 781 l3_parity.error_work);
e3689190
BW		 782 u32 error_status, row, bank, subbank;
783 char *parity_event[5];
784 uint32_t misccpctl;
785 unsigned long flags;
786
787 /* We must turn off DOP level clock gating to access the L3 registers.
788 * In order to prevent a get/put style interface, acquire struct mutex
789 * any time we access those registers.
790 */
791 mutex_lock(&dev_priv->dev->struct_mutex);
792
793 misccpctl = I915_READ(GEN7_MISCCPCTL);
794 I915_WRITE(GEN7_MISCCPCTL, misccpctl & ~GEN7_DOP_CLOCK_GATE_ENABLE);
795 POSTING_READ(GEN7_MISCCPCTL);
796
797 error_status = I915_READ(GEN7_L3CDERRST1);
798 row = GEN7_PARITY_ERROR_ROW(error_status);
799 bank = GEN7_PARITY_ERROR_BANK(error_status);
800 subbank = GEN7_PARITY_ERROR_SUBBANK(error_status);
801
802 I915_WRITE(GEN7_L3CDERRST1, GEN7_PARITY_ERROR_VALID |
803 GEN7_L3CDERRST1_ENABLE);
804 POSTING_READ(GEN7_L3CDERRST1);
805
806 I915_WRITE(GEN7_MISCCPCTL, misccpctl);
807
808 spin_lock_irqsave(&dev_priv->irq_lock, flags);
cc609d5d 809 dev_priv->gt_irq_mask &= ~GT_RENDER_L3_PARITY_ERROR_INTERRUPT;
e3689190
BW		 810 I915_WRITE(GTIMR, dev_priv->gt_irq_mask);
811 spin_unlock_irqrestore(&dev_priv->irq_lock, flags);
812
813 mutex_unlock(&dev_priv->dev->struct_mutex);
814
815 parity_event[0] = "L3_PARITY_ERROR=1";
816 parity_event[1] = kasprintf(GFP_KERNEL, "ROW=%d", row);
817 parity_event[2] = kasprintf(GFP_KERNEL, "BANK=%d", bank);
818 parity_event[3] = kasprintf(GFP_KERNEL, "SUBBANK=%d", subbank);
819 parity_event[4] = NULL;
820
821 kobject_uevent_env(&dev_priv->dev->primary->kdev.kobj,
822 KOBJ_CHANGE, parity_event);
823
824 DRM_DEBUG("Parity error: Row = %d, Bank = %d, Sub bank = %d.\n",
825 row, bank, subbank);
826
827 kfree(parity_event[3]);
828 kfree(parity_event[2]);
829 kfree(parity_event[1]);
830}
831
d0ecd7e2 832static void ivybridge_parity_error_irq_handler(struct drm_device *dev)
e3689190
BW		 833{
834 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
e3689190 835
e1ef7cc2 836 if (!HAS_L3_GPU_CACHE(dev))
e3689190
BW		 837 return;
838
d0ecd7e2 839 spin_lock(&dev_priv->irq_lock);
cc609d5d 840 dev_priv->gt_irq_mask |= GT_RENDER_L3_PARITY_ERROR_INTERRUPT;
e3689190 841 I915_WRITE(GTIMR, dev_priv->gt_irq_mask);
d0ecd7e2 842 spin_unlock(&dev_priv->irq_lock);
e3689190 843
a4da4fa4 844 queue_work(dev_priv->wq, &dev_priv->l3_parity.error_work);
e3689190
BW		 845}
846
f1af8fc1
PZ		 847static void ilk_gt_irq_handler(struct drm_device *dev,
848 struct drm_i915_private *dev_priv,
849 u32 gt_iir)
850{
851 if (gt_iir &
852 (GT_RENDER_USER_INTERRUPT | GT_RENDER_PIPECTL_NOTIFY_INTERRUPT))
853 notify_ring(dev, &dev_priv->ring[RCS]);
854 if (gt_iir & ILK_BSD_USER_INTERRUPT)
855 notify_ring(dev, &dev_priv->ring[VCS]);
856}
857
e7b4c6b1
DV		 858static void snb_gt_irq_handler(struct drm_device *dev,
859 struct drm_i915_private *dev_priv,
860 u32 gt_iir)
861{
862
cc609d5d
BW		 863 if (gt_iir &
864 (GT_RENDER_USER_INTERRUPT | GT_RENDER_PIPECTL_NOTIFY_INTERRUPT))
e7b4c6b1 865 notify_ring(dev, &dev_priv->ring[RCS]);
cc609d5d 866 if (gt_iir & GT_BSD_USER_INTERRUPT)
e7b4c6b1 867 notify_ring(dev, &dev_priv->ring[VCS]);
cc609d5d 868 if (gt_iir & GT_BLT_USER_INTERRUPT)
e7b4c6b1
DV		 869 notify_ring(dev, &dev_priv->ring[BCS]);
870
cc609d5d
BW		 871 if (gt_iir & (GT_BLT_CS_ERROR_INTERRUPT |
872 GT_BSD_CS_ERROR_INTERRUPT |
873 GT_RENDER_CS_MASTER_ERROR_INTERRUPT)) {
e7b4c6b1
DV		 874 DRM_ERROR("GT error interrupt 0x%08x\n", gt_iir);
875 i915_handle_error(dev, false);
876 }
e3689190 877
cc609d5d 878 if (gt_iir & GT_RENDER_L3_PARITY_ERROR_INTERRUPT)
d0ecd7e2 879 ivybridge_parity_error_irq_handler(dev);
e7b4c6b1
DV		 880}
881
baf02a1f 882/* Legacy way of handling PM interrupts */
d0ecd7e2
DV		 883static void gen6_rps_irq_handler(struct drm_i915_private *dev_priv,
884 u32 pm_iir)
fc6826d1 885{
fc6826d1
CW		 886 /*
887 * IIR bits should never already be set because IMR should
888 * prevent an interrupt from being shown in IIR. The warning
889 * displays a case where we've unsafely cleared
c6a828d3 890 * dev_priv->rps.pm_iir. Although missing an interrupt of the same
fc6826d1
CW		 891 * type is not a problem, it displays a problem in the logic.
892 *
c6a828d3 893 * The mask bit in IMR is cleared by dev_priv->rps.work.
fc6826d1
CW		 894 */
895
59cdb63d 896 spin_lock(&dev_priv->irq_lock);
c6a828d3
DV		 897 dev_priv->rps.pm_iir |= pm_iir;
898 I915_WRITE(GEN6_PMIMR, dev_priv->rps.pm_iir);
fc6826d1 899 POSTING_READ(GEN6_PMIMR);
59cdb63d 900 spin_unlock(&dev_priv->irq_lock);
fc6826d1 901
c6a828d3 902 queue_work(dev_priv->wq, &dev_priv->rps.work);
fc6826d1
CW		 903}
904
b543fb04
EE		 905#define HPD_STORM_DETECT_PERIOD 1000
906#define HPD_STORM_THRESHOLD 5
907
10a504de 908static inline void intel_hpd_irq_handler(struct drm_device *dev,
22062dba
DV		 909 u32 hotplug_trigger,
910 const u32 *hpd)
b543fb04
EE		 911{
912 drm_i915_private_t *dev_priv = dev->dev_private;
b543fb04 913 int i;
10a504de 914 bool storm_detected = false;
b543fb04 915
91d131d2
DV		 916 if (!hotplug_trigger)
917 return;
918
b5ea2d56 919 spin_lock(&dev_priv->irq_lock);
b543fb04 920 for (i = 1; i < HPD_NUM_PINS; i++) {
821450c6 921
b543fb04
EE		 922 if (!(hpd[i] & hotplug_trigger) ||
923 dev_priv->hpd_stats[i].hpd_mark != HPD_ENABLED)
924 continue;
925
bc5ead8c 926 dev_priv->hpd_event_bits |= (1 << i);
b543fb04
EE		 927 if (!time_in_range(jiffies, dev_priv->hpd_stats[i].hpd_last_jiffies,
928 dev_priv->hpd_stats[i].hpd_last_jiffies
929 + msecs_to_jiffies(HPD_STORM_DETECT_PERIOD))) {
930 dev_priv->hpd_stats[i].hpd_last_jiffies = jiffies;
931 dev_priv->hpd_stats[i].hpd_cnt = 0;
932 } else if (dev_priv->hpd_stats[i].hpd_cnt > HPD_STORM_THRESHOLD) {
933 dev_priv->hpd_stats[i].hpd_mark = HPD_MARK_DISABLED;
142e2398 934 dev_priv->hpd_event_bits &= ~(1 << i);
b543fb04 935 DRM_DEBUG_KMS("HPD interrupt storm detected on PIN %d\n", i);
10a504de 936 storm_detected = true;
b543fb04
EE		 937 } else {
938 dev_priv->hpd_stats[i].hpd_cnt++;
939 }
940 }
941
10a504de
DV		 942 if (storm_detected)
943 dev_priv->display.hpd_irq_setup(dev);
b5ea2d56 944 spin_unlock(&dev_priv->irq_lock);
5876fa0d
DV		 945
946 queue_work(dev_priv->wq,
947 &dev_priv->hotplug_work);
b543fb04
EE		 948}
949
515ac2bb
DV		 950static void gmbus_irq_handler(struct drm_device *dev)
951{
28c70f16
DV		 952 struct drm_i915_private *dev_priv = (drm_i915_private_t *) dev->dev_private;
953
28c70f16 954 wake_up_all(&dev_priv->gmbus_wait_queue);
515ac2bb
DV		 955}
956
ce99c256
DV		 957static void dp_aux_irq_handler(struct drm_device *dev)
958{
9ee32fea
DV		 959 struct drm_i915_private *dev_priv = (drm_i915_private_t *) dev->dev_private;
960
9ee32fea 961 wake_up_all(&dev_priv->gmbus_wait_queue);
ce99c256
DV		 962}
963
d0ecd7e2 964/* Unlike gen6_rps_irq_handler() from which this function is originally derived,
baf02a1f
BW		 965 * we must be able to deal with other PM interrupts. This is complicated because
966 * of the way in which we use the masks to defer the RPS work (which for
967 * posterity is necessary because of forcewake).
968 */
969static void hsw_pm_irq_handler(struct drm_i915_private *dev_priv,
970 u32 pm_iir)
971{
41a05a3a 972 if (pm_iir & GEN6_PM_RPS_EVENTS) {
59cdb63d 973 spin_lock(&dev_priv->irq_lock);
41a05a3a 974 dev_priv->rps.pm_iir |= pm_iir & GEN6_PM_RPS_EVENTS;
baf02a1f
BW		 975 I915_WRITE(GEN6_PMIMR, dev_priv->rps.pm_iir);
976 /* never want to mask useful interrupts. (also posting read) */
4848405c 977 WARN_ON(I915_READ_NOTRACE(GEN6_PMIMR) & ~GEN6_PM_RPS_EVENTS);
59cdb63d 978 spin_unlock(&dev_priv->irq_lock);
2adbee62
DV		 979
980 queue_work(dev_priv->wq, &dev_priv->rps.work);
baf02a1f 981 }
baf02a1f 982
41a05a3a
DV		 983 if (pm_iir & PM_VEBOX_USER_INTERRUPT)
984 notify_ring(dev_priv->dev, &dev_priv->ring[VECS]);
12638c57 985
41a05a3a
DV		 986 if (pm_iir & PM_VEBOX_CS_ERROR_INTERRUPT) {
987 DRM_ERROR("VEBOX CS error interrupt 0x%08x\n", pm_iir);
988 i915_handle_error(dev_priv->dev, false);
12638c57 989 }
baf02a1f
BW		 990}
991
ff1f525e 992static irqreturn_t valleyview_irq_handler(int irq, void *arg)
7e231dbe
JB		 993{
994 struct drm_device *dev = (struct drm_device *) arg;
995 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
996 u32 iir, gt_iir, pm_iir;
997 irqreturn_t ret = IRQ_NONE;
998 unsigned long irqflags;
999 int pipe;
1000 u32 pipe_stats[I915_MAX_PIPES];
7e231dbe
JB		 1001
1002 atomic_inc(&dev_priv->irq_received);
1003
7e231dbe
JB		 1004 while (true) {
1005 iir = I915_READ(VLV_IIR);
1006 gt_iir = I915_READ(GTIIR);
1007 pm_iir = I915_READ(GEN6_PMIIR);
1008
1009 if (gt_iir == 0 && pm_iir == 0 && iir == 0)
1010 goto out;
1011
1012 ret = IRQ_HANDLED;
1013
e7b4c6b1 1014 snb_gt_irq_handler(dev, dev_priv, gt_iir);
7e231dbe
JB		 1015
1016 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
1017 for_each_pipe(pipe) {
1018 int reg = PIPESTAT(pipe);
1019 pipe_stats[pipe] = I915_READ(reg);
1020
1021 /*
1022 * Clear the PIPE*STAT regs before the IIR
1023 */
1024 if (pipe_stats[pipe] & 0x8000ffff) {
1025 if (pipe_stats[pipe] & PIPE_FIFO_UNDERRUN_STATUS)
1026 DRM_DEBUG_DRIVER("pipe %c underrun\n",
1027 pipe_name(pipe));
1028 I915_WRITE(reg, pipe_stats[pipe]);
1029 }
1030 }
1031 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
1032
31acc7f5
JB		 1033 for_each_pipe(pipe) {
1034 if (pipe_stats[pipe] & PIPE_VBLANK_INTERRUPT_STATUS)
1035 drm_handle_vblank(dev, pipe);
1036
1037 if (pipe_stats[pipe] & PLANE_FLIPDONE_INT_STATUS_VLV) {
1038 intel_prepare_page_flip(dev, pipe);
1039 intel_finish_page_flip(dev, pipe);
1040 }
1041 }
1042
7e231dbe
JB		 1043 /* Consume port. Then clear IIR or we'll miss events */
1044 if (iir & I915_DISPLAY_PORT_INTERRUPT) {
1045 u32 hotplug_status = I915_READ(PORT_HOTPLUG_STAT);
b543fb04 1046 u32 hotplug_trigger = hotplug_status & HOTPLUG_INT_STATUS_I915;
7e231dbe
JB		 1047
1048 DRM_DEBUG_DRIVER("hotplug event received, stat 0x%08x\n",
1049 hotplug_status);
91d131d2
DV		 1050
1051 intel_hpd_irq_handler(dev, hotplug_trigger, hpd_status_i915);
1052
7e231dbe
JB		 1053 I915_WRITE(PORT_HOTPLUG_STAT, hotplug_status);
1054 I915_READ(PORT_HOTPLUG_STAT);
1055 }
1056
515ac2bb
DV		 1057 if (pipe_stats[0] & PIPE_GMBUS_INTERRUPT_STATUS)
1058 gmbus_irq_handler(dev);
7e231dbe 1059
4848405c 1060 if (pm_iir & GEN6_PM_RPS_EVENTS)
d0ecd7e2 1061 gen6_rps_irq_handler(dev_priv, pm_iir);
7e231dbe
JB		 1062
1063 I915_WRITE(GTIIR, gt_iir);
1064 I915_WRITE(GEN6_PMIIR, pm_iir);
1065 I915_WRITE(VLV_IIR, iir);
1066 }
1067
1068out:
1069 return ret;
1070}
1071
23e81d69 1072static void ibx_irq_handler(struct drm_device *dev, u32 pch_iir)
776ad806
JB		 1073{
1074 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
9db4a9c7 1075 int pipe;
b543fb04 1076 u32 hotplug_trigger = pch_iir & SDE_HOTPLUG_MASK;
776ad806 1077
91d131d2
DV		 1078 intel_hpd_irq_handler(dev, hotplug_trigger, hpd_ibx);
1079
cfc33bf7
VS		 1080 if (pch_iir & SDE_AUDIO_POWER_MASK) {
1081 int port = ffs((pch_iir & SDE_AUDIO_POWER_MASK) >>
1082 SDE_AUDIO_POWER_SHIFT);
776ad806 1083 DRM_DEBUG_DRIVER("PCH audio power change on port %d\n",
cfc33bf7
VS		 1084 port_name(port));
1085 }
776ad806 1086
ce99c256
DV		 1087 if (pch_iir & SDE_AUX_MASK)
1088 dp_aux_irq_handler(dev);
1089
776ad806 1090 if (pch_iir & SDE_GMBUS)
515ac2bb 1091 gmbus_irq_handler(dev);
776ad806
JB		 1092
1093 if (pch_iir & SDE_AUDIO_HDCP_MASK)
1094 DRM_DEBUG_DRIVER("PCH HDCP audio interrupt\n");
1095
1096 if (pch_iir & SDE_AUDIO_TRANS_MASK)
1097 DRM_DEBUG_DRIVER("PCH transcoder audio interrupt\n");
1098
1099 if (pch_iir & SDE_POISON)
1100 DRM_ERROR("PCH poison interrupt\n");
1101
9db4a9c7
JB		 1102 if (pch_iir & SDE_FDI_MASK)
1103 for_each_pipe(pipe)
1104 DRM_DEBUG_DRIVER(" pipe %c FDI IIR: 0x%08x\n",
1105 pipe_name(pipe),
1106 I915_READ(FDI_RX_IIR(pipe)));
776ad806
JB		 1107
1108 if (pch_iir & (SDE_TRANSB_CRC_DONE | SDE_TRANSA_CRC_DONE))
1109 DRM_DEBUG_DRIVER("PCH transcoder CRC done interrupt\n");
1110
1111 if (pch_iir & (SDE_TRANSB_CRC_ERR | SDE_TRANSA_CRC_ERR))
1112 DRM_DEBUG_DRIVER("PCH transcoder CRC error interrupt\n");
1113
776ad806 1114 if (pch_iir & SDE_TRANSA_FIFO_UNDER)
8664281b
PZ		 1115 if (intel_set_pch_fifo_underrun_reporting(dev, TRANSCODER_A,
1116 false))
1117 DRM_DEBUG_DRIVER("PCH transcoder A FIFO underrun\n");
1118
1119 if (pch_iir & SDE_TRANSB_FIFO_UNDER)
1120 if (intel_set_pch_fifo_underrun_reporting(dev, TRANSCODER_B,
1121 false))
1122 DRM_DEBUG_DRIVER("PCH transcoder B FIFO underrun\n");
1123}
1124
1125static void ivb_err_int_handler(struct drm_device *dev)
1126{
1127 struct drm_i915_private *dev_priv = dev->dev_private;
1128 u32 err_int = I915_READ(GEN7_ERR_INT);
1129
de032bf4
PZ		 1130 if (err_int & ERR_INT_POISON)
1131 DRM_ERROR("Poison interrupt\n");
1132
8664281b
PZ		 1133 if (err_int & ERR_INT_FIFO_UNDERRUN_A)
1134 if (intel_set_cpu_fifo_underrun_reporting(dev, PIPE_A, false))
1135 DRM_DEBUG_DRIVER("Pipe A FIFO underrun\n");
1136
1137 if (err_int & ERR_INT_FIFO_UNDERRUN_B)
1138 if (intel_set_cpu_fifo_underrun_reporting(dev, PIPE_B, false))
1139 DRM_DEBUG_DRIVER("Pipe B FIFO underrun\n");
1140
1141 if (err_int & ERR_INT_FIFO_UNDERRUN_C)
1142 if (intel_set_cpu_fifo_underrun_reporting(dev, PIPE_C, false))
1143 DRM_DEBUG_DRIVER("Pipe C FIFO underrun\n");
1144
1145 I915_WRITE(GEN7_ERR_INT, err_int);
1146}
1147
1148static void cpt_serr_int_handler(struct drm_device *dev)
1149{
1150 struct drm_i915_private *dev_priv = dev->dev_private;
1151 u32 serr_int = I915_READ(SERR_INT);
1152
de032bf4
PZ		 1153 if (serr_int & SERR_INT_POISON)
1154 DRM_ERROR("PCH poison interrupt\n");
1155
8664281b
PZ		 1156 if (serr_int & SERR_INT_TRANS_A_FIFO_UNDERRUN)
1157 if (intel_set_pch_fifo_underrun_reporting(dev, TRANSCODER_A,
1158 false))
1159 DRM_DEBUG_DRIVER("PCH transcoder A FIFO underrun\n");
1160
1161 if (serr_int & SERR_INT_TRANS_B_FIFO_UNDERRUN)
1162 if (intel_set_pch_fifo_underrun_reporting(dev, TRANSCODER_B,
1163 false))
1164 DRM_DEBUG_DRIVER("PCH transcoder B FIFO underrun\n");
1165
1166 if (serr_int & SERR_INT_TRANS_C_FIFO_UNDERRUN)
1167 if (intel_set_pch_fifo_underrun_reporting(dev, TRANSCODER_C,
1168 false))
1169 DRM_DEBUG_DRIVER("PCH transcoder C FIFO underrun\n");
1170
1171 I915_WRITE(SERR_INT, serr_int);
776ad806
JB		 1172}
1173
23e81d69
AJ		 1174static void cpt_irq_handler(struct drm_device *dev, u32 pch_iir)
1175{
1176 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1177 int pipe;
b543fb04 1178 u32 hotplug_trigger = pch_iir & SDE_HOTPLUG_MASK_CPT;
23e81d69 1179
91d131d2
DV		 1180 intel_hpd_irq_handler(dev, hotplug_trigger, hpd_cpt);
1181
cfc33bf7
VS		 1182 if (pch_iir & SDE_AUDIO_POWER_MASK_CPT) {
1183 int port = ffs((pch_iir & SDE_AUDIO_POWER_MASK_CPT) >>
1184 SDE_AUDIO_POWER_SHIFT_CPT);
1185 DRM_DEBUG_DRIVER("PCH audio power change on port %c\n",
1186 port_name(port));
1187 }
23e81d69
AJ		 1188
1189 if (pch_iir & SDE_AUX_MASK_CPT)
ce99c256 1190 dp_aux_irq_handler(dev);
23e81d69
AJ		 1191
1192 if (pch_iir & SDE_GMBUS_CPT)
515ac2bb 1193 gmbus_irq_handler(dev);
23e81d69
AJ		 1194
1195 if (pch_iir & SDE_AUDIO_CP_REQ_CPT)
1196 DRM_DEBUG_DRIVER("Audio CP request interrupt\n");
1197
1198 if (pch_iir & SDE_AUDIO_CP_CHG_CPT)
1199 DRM_DEBUG_DRIVER("Audio CP change interrupt\n");
1200
1201 if (pch_iir & SDE_FDI_MASK_CPT)
1202 for_each_pipe(pipe)
1203 DRM_DEBUG_DRIVER(" pipe %c FDI IIR: 0x%08x\n",
1204 pipe_name(pipe),
1205 I915_READ(FDI_RX_IIR(pipe)));
8664281b
PZ		 1206
1207 if (pch_iir & SDE_ERROR_CPT)
1208 cpt_serr_int_handler(dev);
23e81d69
AJ		 1209}
1210
c008bc6e
PZ		 1211static void ilk_display_irq_handler(struct drm_device *dev, u32 de_iir)
1212{
1213 struct drm_i915_private *dev_priv = dev->dev_private;
1214
1215 if (de_iir & DE_AUX_CHANNEL_A)
1216 dp_aux_irq_handler(dev);
1217
1218 if (de_iir & DE_GSE)
1219 intel_opregion_asle_intr(dev);
1220
1221 if (de_iir & DE_PIPEA_VBLANK)
1222 drm_handle_vblank(dev, 0);
1223
1224 if (de_iir & DE_PIPEB_VBLANK)
1225 drm_handle_vblank(dev, 1);
1226
1227 if (de_iir & DE_POISON)
1228 DRM_ERROR("Poison interrupt\n");
1229
1230 if (de_iir & DE_PIPEA_FIFO_UNDERRUN)
1231 if (intel_set_cpu_fifo_underrun_reporting(dev, PIPE_A, false))
1232 DRM_DEBUG_DRIVER("Pipe A FIFO underrun\n");
1233
1234 if (de_iir & DE_PIPEB_FIFO_UNDERRUN)
1235 if (intel_set_cpu_fifo_underrun_reporting(dev, PIPE_B, false))
1236 DRM_DEBUG_DRIVER("Pipe B FIFO underrun\n");
1237
1238 if (de_iir & DE_PLANEA_FLIP_DONE) {
1239 intel_prepare_page_flip(dev, 0);
1240 intel_finish_page_flip_plane(dev, 0);
1241 }
1242
1243 if (de_iir & DE_PLANEB_FLIP_DONE) {
1244 intel_prepare_page_flip(dev, 1);
1245 intel_finish_page_flip_plane(dev, 1);
1246 }
1247
1248 /* check event from PCH */
1249 if (de_iir & DE_PCH_EVENT) {
1250 u32 pch_iir = I915_READ(SDEIIR);
1251
1252 if (HAS_PCH_CPT(dev))
1253 cpt_irq_handler(dev, pch_iir);
1254 else
1255 ibx_irq_handler(dev, pch_iir);
1256
1257 /* should clear PCH hotplug event before clear CPU irq */
1258 I915_WRITE(SDEIIR, pch_iir);
1259 }
1260
1261 if (IS_GEN5(dev) && de_iir & DE_PCU_EVENT)
1262 ironlake_rps_change_irq_handler(dev);
1263}
1264
9719fb98
PZ		 1265static void ivb_display_irq_handler(struct drm_device *dev, u32 de_iir)
1266{
1267 struct drm_i915_private *dev_priv = dev->dev_private;
1268 int i;
1269
1270 if (de_iir & DE_ERR_INT_IVB)
1271 ivb_err_int_handler(dev);
1272
1273 if (de_iir & DE_AUX_CHANNEL_A_IVB)
1274 dp_aux_irq_handler(dev);
1275
1276 if (de_iir & DE_GSE_IVB)
1277 intel_opregion_asle_intr(dev);
1278
1279 for (i = 0; i < 3; i++) {
1280 if (de_iir & (DE_PIPEA_VBLANK_IVB << (5 * i)))
1281 drm_handle_vblank(dev, i);
1282 if (de_iir & (DE_PLANEA_FLIP_DONE_IVB << (5 * i))) {
1283 intel_prepare_page_flip(dev, i);
1284 intel_finish_page_flip_plane(dev, i);
1285 }
1286 }
1287
1288 /* check event from PCH */
1289 if (!HAS_PCH_NOP(dev) && (de_iir & DE_PCH_EVENT_IVB)) {
1290 u32 pch_iir = I915_READ(SDEIIR);
1291
1292 cpt_irq_handler(dev, pch_iir);
1293
1294 /* clear PCH hotplug event before clear CPU irq */
1295 I915_WRITE(SDEIIR, pch_iir);
1296 }
1297}
1298
f1af8fc1 1299static irqreturn_t ironlake_irq_handler(int irq, void *arg)
b1f14ad0
JB		 1300{
1301 struct drm_device *dev = (struct drm_device *) arg;
1302 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
f1af8fc1 1303 u32 de_iir, gt_iir, de_ier, sde_ier = 0;
0e43406b 1304 irqreturn_t ret = IRQ_NONE;
b1f14ad0
JB		 1305
1306 atomic_inc(&dev_priv->irq_received);
1307
8664281b
PZ		 1308 /* We get interrupts on unclaimed registers, so check for this before we
1309 * do any I915_{READ,WRITE}. */
1310 if (IS_HASWELL(dev) &&
1311 (I915_READ_NOTRACE(FPGA_DBG) & FPGA_DBG_RM_NOCLAIM)) {
1312 DRM_ERROR("Unclaimed register before interrupt\n");
1313 I915_WRITE_NOTRACE(FPGA_DBG, FPGA_DBG_RM_NOCLAIM);
1314 }
1315
b1f14ad0
JB		 1316 /* disable master interrupt before clearing iir */
1317 de_ier = I915_READ(DEIER);
1318 I915_WRITE(DEIER, de_ier & ~DE_MASTER_IRQ_CONTROL);
23a78516 1319 POSTING_READ(DEIER);
b1f14ad0 1320
44498aea
PZ		 1321 /* Disable south interrupts. We'll only write to SDEIIR once, so further
1322 * interrupts will will be stored on its back queue, and then we'll be
1323 * able to process them after we restore SDEIER (as soon as we restore
1324 * it, we'll get an interrupt if SDEIIR still has something to process
1325 * due to its back queue). */
ab5c608b
BW		 1326 if (!HAS_PCH_NOP(dev)) {
1327 sde_ier = I915_READ(SDEIER);
1328 I915_WRITE(SDEIER, 0);
1329 POSTING_READ(SDEIER);
1330 }
44498aea 1331
8664281b
PZ		 1332 /* On Haswell, also mask ERR_INT because we don't want to risk
1333 * generating "unclaimed register" interrupts from inside the interrupt
1334 * handler. */
4bc9d430
DV		 1335 if (IS_HASWELL(dev)) {
1336 spin_lock(&dev_priv->irq_lock);
8664281b 1337 ironlake_disable_display_irq(dev_priv, DE_ERR_INT_IVB);
4bc9d430
DV		 1338 spin_unlock(&dev_priv->irq_lock);
1339 }
8664281b 1340
b1f14ad0 1341 gt_iir = I915_READ(GTIIR);
0e43406b 1342 if (gt_iir) {
f1af8fc1
PZ		 1343 if (IS_GEN5(dev))
1344 ilk_gt_irq_handler(dev, dev_priv, gt_iir);
1345 else
1346 snb_gt_irq_handler(dev, dev_priv, gt_iir);
0e43406b
CW		 1347 I915_WRITE(GTIIR, gt_iir);
1348 ret = IRQ_HANDLED;
b1f14ad0
JB		 1349 }
1350
0e43406b
CW		 1351 de_iir = I915_READ(DEIIR);
1352 if (de_iir) {
f1af8fc1
PZ		 1353 if (INTEL_INFO(dev)->gen >= 7)
1354 ivb_display_irq_handler(dev, de_iir);
1355 else
1356 ilk_display_irq_handler(dev, de_iir);
0e43406b
CW		 1357 I915_WRITE(DEIIR, de_iir);
1358 ret = IRQ_HANDLED;
b1f14ad0
JB		 1359 }
1360
f1af8fc1
PZ		 1361 if (INTEL_INFO(dev)->gen >= 6) {
1362 u32 pm_iir = I915_READ(GEN6_PMIIR);
1363 if (pm_iir) {
1364 if (IS_HASWELL(dev))
1365 hsw_pm_irq_handler(dev_priv, pm_iir);
1366 else if (pm_iir & GEN6_PM_RPS_EVENTS)
1367 gen6_rps_irq_handler(dev_priv, pm_iir);
1368 I915_WRITE(GEN6_PMIIR, pm_iir);
1369 ret = IRQ_HANDLED;
1370 }
0e43406b 1371 }
b1f14ad0 1372
4bc9d430
DV		 1373 if (IS_HASWELL(dev)) {
1374 spin_lock(&dev_priv->irq_lock);
1375 if (ivb_can_enable_err_int(dev))
1376 ironlake_enable_display_irq(dev_priv, DE_ERR_INT_IVB);
1377 spin_unlock(&dev_priv->irq_lock);
1378 }
8664281b 1379
b1f14ad0
JB		 1380 I915_WRITE(DEIER, de_ier);
1381 POSTING_READ(DEIER);
ab5c608b
BW		 1382 if (!HAS_PCH_NOP(dev)) {
1383 I915_WRITE(SDEIER, sde_ier);
1384 POSTING_READ(SDEIER);
1385 }
b1f14ad0
JB		 1386
1387 return ret;
1388}
1389
8a905236
JB		 1390/**
1391 * i915_error_work_func - do process context error handling work
1392 * @work: work struct
1393 *
1394 * Fire an error uevent so userspace can see that a hang or error
1395 * was detected.
1396 */
1397static void i915_error_work_func(struct work_struct *work)
1398{
1f83fee0
DV		 1399 struct i915_gpu_error *error = container_of(work, struct i915_gpu_error,
1400 work);
1401 drm_i915_private_t *dev_priv = container_of(error, drm_i915_private_t,
1402 gpu_error);
8a905236 1403 struct drm_device *dev = dev_priv->dev;
f69061be 1404 struct intel_ring_buffer *ring;
f316a42c
BG		 1405 char *error_event[] = { "ERROR=1", NULL };
1406 char *reset_event[] = { "RESET=1", NULL };
1407 char *reset_done_event[] = { "ERROR=0", NULL };
f69061be 1408 int i, ret;
8a905236 1409
f316a42c
BG		 1410 kobject_uevent_env(&dev->primary->kdev.kobj, KOBJ_CHANGE, error_event);
1411
7db0ba24
DV		 1412 /*
1413 * Note that there's only one work item which does gpu resets, so we
1414 * need not worry about concurrent gpu resets potentially incrementing
1415 * error->reset_counter twice. We only need to take care of another
1416 * racing irq/hangcheck declaring the gpu dead for a second time. A
1417 * quick check for that is good enough: schedule_work ensures the
1418 * correct ordering between hang detection and this work item, and since
1419 * the reset in-progress bit is only ever set by code outside of this
1420 * work we don't need to worry about any other races.
1421 */
1422 if (i915_reset_in_progress(error) && !i915_terminally_wedged(error)) {
f803aa55 1423 DRM_DEBUG_DRIVER("resetting chip\n");
7db0ba24
DV		 1424 kobject_uevent_env(&dev->primary->kdev.kobj, KOBJ_CHANGE,
1425 reset_event);
1f83fee0 1426
f69061be
DV		 1427 ret = i915_reset(dev);
1428
1429 if (ret == 0) {
1430 /*
1431 * After all the gem state is reset, increment the reset
1432 * counter and wake up everyone waiting for the reset to
1433 * complete.
1434 *
1435 * Since unlock operations are a one-sided barrier only,
1436 * we need to insert a barrier here to order any seqno
1437 * updates before
1438 * the counter increment.
1439 */
1440 smp_mb__before_atomic_inc();
1441 atomic_inc(&dev_priv->gpu_error.reset_counter);
1442
1443 kobject_uevent_env(&dev->primary->kdev.kobj,
1444 KOBJ_CHANGE, reset_done_event);
1f83fee0
DV		 1445 } else {
1446 atomic_set(&error->reset_counter, I915_WEDGED);
f316a42c 1447 }
1f83fee0 1448
f69061be
DV		 1449 for_each_ring(ring, dev_priv, i)
1450 wake_up_all(&ring->irq_queue);
1451
96a02917
VS		 1452 intel_display_handle_reset(dev);
1453
1f83fee0 1454 wake_up_all(&dev_priv->gpu_error.reset_queue);
f316a42c 1455 }
8a905236
JB		 1456}
1457
35aed2e6 1458static void i915_report_and_clear_eir(struct drm_device *dev)
8a905236
JB		 1459{
1460 struct drm_i915_private *dev_priv = dev->dev_private;
bd9854f9 1461 uint32_t instdone[I915_NUM_INSTDONE_REG];
8a905236 1462 u32 eir = I915_READ(EIR);
050ee91f 1463 int pipe, i;
8a905236 1464
35aed2e6
CW		 1465 if (!eir)
1466 return;
8a905236 1467
a70491cc 1468 pr_err("render error detected, EIR: 0x%08x\n", eir);
8a905236 1469
bd9854f9
BW		 1470 i915_get_extra_instdone(dev, instdone);
1471
8a905236
JB		 1472 if (IS_G4X(dev)) {
1473 if (eir & (GM45_ERROR_MEM_PRIV | GM45_ERROR_CP_PRIV)) {
1474 u32 ipeir = I915_READ(IPEIR_I965);
1475
a70491cc
JP		 1476 pr_err(" IPEIR: 0x%08x\n", I915_READ(IPEIR_I965));
1477 pr_err(" IPEHR: 0x%08x\n", I915_READ(IPEHR_I965));
050ee91f
BW		 1478 for (i = 0; i < ARRAY_SIZE(instdone); i++)
1479 pr_err(" INSTDONE_%d: 0x%08x\n", i, instdone[i]);
a70491cc 1480 pr_err(" INSTPS: 0x%08x\n", I915_READ(INSTPS));
a70491cc 1481 pr_err(" ACTHD: 0x%08x\n", I915_READ(ACTHD_I965));
8a905236 1482 I915_WRITE(IPEIR_I965, ipeir);
3143a2bf 1483 POSTING_READ(IPEIR_I965);
8a905236
JB		 1484 }
1485 if (eir & GM45_ERROR_PAGE_TABLE) {
1486 u32 pgtbl_err = I915_READ(PGTBL_ER);
a70491cc
JP		 1487 pr_err("page table error\n");
1488 pr_err(" PGTBL_ER: 0x%08x\n", pgtbl_err);
8a905236 1489 I915_WRITE(PGTBL_ER, pgtbl_err);
3143a2bf 1490 POSTING_READ(PGTBL_ER);
8a905236
JB		 1491 }
1492 }
1493
a6c45cf0 1494 if (!IS_GEN2(dev)) {
8a905236
JB		 1495 if (eir & I915_ERROR_PAGE_TABLE) {
1496 u32 pgtbl_err = I915_READ(PGTBL_ER);
a70491cc
JP		 1497 pr_err("page table error\n");
1498 pr_err(" PGTBL_ER: 0x%08x\n", pgtbl_err);
8a905236 1499 I915_WRITE(PGTBL_ER, pgtbl_err);
3143a2bf 1500 POSTING_READ(PGTBL_ER);
8a905236
JB		 1501 }
1502 }
1503
1504 if (eir & I915_ERROR_MEMORY_REFRESH) {
a70491cc 1505 pr_err("memory refresh error:\n");
9db4a9c7 1506 for_each_pipe(pipe)
a70491cc 1507 pr_err("pipe %c stat: 0x%08x\n",
9db4a9c7 1508 pipe_name(pipe), I915_READ(PIPESTAT(pipe)));
8a905236
JB		 1509 /* pipestat has already been acked */
1510 }
1511 if (eir & I915_ERROR_INSTRUCTION) {
a70491cc
JP		 1512 pr_err("instruction error\n");
1513 pr_err(" INSTPM: 0x%08x\n", I915_READ(INSTPM));
050ee91f
BW		 1514 for (i = 0; i < ARRAY_SIZE(instdone); i++)
1515 pr_err(" INSTDONE_%d: 0x%08x\n", i, instdone[i]);
a6c45cf0 1516 if (INTEL_INFO(dev)->gen < 4) {
8a905236
JB		 1517 u32 ipeir = I915_READ(IPEIR);
1518
a70491cc
JP		 1519 pr_err(" IPEIR: 0x%08x\n", I915_READ(IPEIR));
1520 pr_err(" IPEHR: 0x%08x\n", I915_READ(IPEHR));
a70491cc 1521 pr_err(" ACTHD: 0x%08x\n", I915_READ(ACTHD));
8a905236 1522 I915_WRITE(IPEIR, ipeir);
3143a2bf 1523 POSTING_READ(IPEIR);
8a905236
JB		 1524 } else {
1525 u32 ipeir = I915_READ(IPEIR_I965);
1526
a70491cc
JP		 1527 pr_err(" IPEIR: 0x%08x\n", I915_READ(IPEIR_I965));
1528 pr_err(" IPEHR: 0x%08x\n", I915_READ(IPEHR_I965));
a70491cc 1529 pr_err(" INSTPS: 0x%08x\n", I915_READ(INSTPS));
a70491cc 1530 pr_err(" ACTHD: 0x%08x\n", I915_READ(ACTHD_I965));
8a905236 1531 I915_WRITE(IPEIR_I965, ipeir);
3143a2bf 1532 POSTING_READ(IPEIR_I965);
8a905236
JB		 1533 }
1534 }
1535
1536 I915_WRITE(EIR, eir);
3143a2bf 1537 POSTING_READ(EIR);
8a905236
JB		 1538 eir = I915_READ(EIR);
1539 if (eir) {
1540 /*
1541 * some errors might have become stuck,
1542 * mask them.
1543 */
1544 DRM_ERROR("EIR stuck: 0x%08x, masking\n", eir);
1545 I915_WRITE(EMR, I915_READ(EMR) | eir);
1546 I915_WRITE(IIR, I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT);
1547 }
35aed2e6
CW		 1548}
1549
1550/**
1551 * i915_handle_error - handle an error interrupt
1552 * @dev: drm device
1553 *
1554 * Do some basic checking of regsiter state at error interrupt time and
1555 * dump it to the syslog. Also call i915_capture_error_state() to make
1556 * sure we get a record and make it available in debugfs. Fire a uevent
1557 * so userspace knows something bad happened (should trigger collection
1558 * of a ring dump etc.).
1559 */
527f9e90 1560void i915_handle_error(struct drm_device *dev, bool wedged)
35aed2e6
CW		 1561{
1562 struct drm_i915_private *dev_priv = dev->dev_private;
b4519513
CW		 1563 struct intel_ring_buffer *ring;
1564 int i;
35aed2e6
CW		 1565
1566 i915_capture_error_state(dev);
1567 i915_report_and_clear_eir(dev);
8a905236 1568
ba1234d1 1569 if (wedged) {
f69061be
DV		 1570 atomic_set_mask(I915_RESET_IN_PROGRESS_FLAG,
1571 &dev_priv->gpu_error.reset_counter);
ba1234d1 1572
11ed50ec 1573 /*
1f83fee0
DV		 1574 * Wakeup waiting processes so that the reset work item
1575 * doesn't deadlock trying to grab various locks.
11ed50ec 1576 */
b4519513
CW		 1577 for_each_ring(ring, dev_priv, i)
1578 wake_up_all(&ring->irq_queue);
11ed50ec
BG		 1579 }
1580
99584db3 1581 queue_work(dev_priv->wq, &dev_priv->gpu_error.work);
8a905236
JB		 1582}
1583
21ad8330 1584static void __always_unused i915_pageflip_stall_check(struct drm_device *dev, int pipe)
4e5359cd
SF		 1585{
1586 drm_i915_private_t *dev_priv = dev->dev_private;
1587 struct drm_crtc *crtc = dev_priv->pipe_to_crtc_mapping[pipe];
1588 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
05394f39 1589 struct drm_i915_gem_object *obj;
4e5359cd
SF		 1590 struct intel_unpin_work *work;
1591 unsigned long flags;
1592 bool stall_detected;
1593
1594 /* Ignore early vblank irqs */
1595 if (intel_crtc == NULL)
1596 return;
1597
1598 spin_lock_irqsave(&dev->event_lock, flags);
1599 work = intel_crtc->unpin_work;
1600
e7d841ca
CW		 1601 if (work == NULL ||
1602 atomic_read(&work->pending) >= INTEL_FLIP_COMPLETE ||
1603 !work->enable_stall_check) {
4e5359cd
SF		 1604 /* Either the pending flip IRQ arrived, or we're too early. Don't check */
1605 spin_unlock_irqrestore(&dev->event_lock, flags);
1606 return;
1607 }
1608
1609 /* Potential stall - if we see that the flip has happened, assume a missed interrupt */
05394f39 1610 obj = work->pending_flip_obj;
a6c45cf0 1611 if (INTEL_INFO(dev)->gen >= 4) {
9db4a9c7 1612 int dspsurf = DSPSURF(intel_crtc->plane);
446f2545 1613 stall_detected = I915_HI_DISPBASE(I915_READ(dspsurf)) ==
f343c5f6 1614 i915_gem_obj_ggtt_offset(obj);
4e5359cd 1615 } else {
9db4a9c7 1616 int dspaddr = DSPADDR(intel_crtc->plane);
f343c5f6 1617 stall_detected = I915_READ(dspaddr) == (i915_gem_obj_ggtt_offset(obj) +
01f2c773 1618 crtc->y * crtc->fb->pitches[0] +
4e5359cd
SF		 1619 crtc->x * crtc->fb->bits_per_pixel/8);
1620 }
1621
1622 spin_unlock_irqrestore(&dev->event_lock, flags);
1623
1624 if (stall_detected) {
1625 DRM_DEBUG_DRIVER("Pageflip stall detected\n");
1626 intel_prepare_page_flip(dev, intel_crtc->plane);
1627 }
1628}
1629
42f52ef8
KP		 1630/* Called from drm generic code, passed 'crtc' which
1631 * we use as a pipe index
1632 */
f71d4af4 1633static int i915_enable_vblank(struct drm_device *dev, int pipe)
0a3e67a4
JB		 1634{
1635 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
e9d21d7f 1636 unsigned long irqflags;
71e0ffa5 1637
5eddb70b 1638 if (!i915_pipe_enabled(dev, pipe))
71e0ffa5 1639 return -EINVAL;
0a3e67a4 1640
1ec14ad3 1641 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
f796cf8f 1642 if (INTEL_INFO(dev)->gen >= 4)
7c463586
KP		 1643 i915_enable_pipestat(dev_priv, pipe,
1644 PIPE_START_VBLANK_INTERRUPT_ENABLE);
e9d21d7f 1645 else
7c463586
KP		 1646 i915_enable_pipestat(dev_priv, pipe,
1647 PIPE_VBLANK_INTERRUPT_ENABLE);
8692d00e
CW		 1648
1649 /* maintain vblank delivery even in deep C-states */
1650 if (dev_priv->info->gen == 3)
6b26c86d 1651 I915_WRITE(INSTPM, _MASKED_BIT_DISABLE(INSTPM_AGPBUSY_DIS));
1ec14ad3 1652 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
8692d00e 1653
0a3e67a4
JB		 1654 return 0;
1655}
1656
f71d4af4 1657static int ironlake_enable_vblank(struct drm_device *dev, int pipe)
f796cf8f
JB		 1658{
1659 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1660 unsigned long irqflags;
1661
1662 if (!i915_pipe_enabled(dev, pipe))
1663 return -EINVAL;
1664
1665 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
1666 ironlake_enable_display_irq(dev_priv, (pipe == 0) ?
0206e353 1667 DE_PIPEA_VBLANK : DE_PIPEB_VBLANK);
f796cf8f
JB		 1668 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
1669
1670 return 0;
1671}
1672
f71d4af4 1673static int ivybridge_enable_vblank(struct drm_device *dev, int pipe)
b1f14ad0
JB		 1674{
1675 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1676 unsigned long irqflags;
1677
1678 if (!i915_pipe_enabled(dev, pipe))
1679 return -EINVAL;
1680
1681 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
b615b57a
CW		 1682 ironlake_enable_display_irq(dev_priv,
1683 DE_PIPEA_VBLANK_IVB << (5 * pipe));
b1f14ad0
JB		 1684 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
1685
1686 return 0;
1687}
1688
7e231dbe
JB		 1689static int valleyview_enable_vblank(struct drm_device *dev, int pipe)
1690{
1691 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1692 unsigned long irqflags;
31acc7f5 1693 u32 imr;
7e231dbe
JB		 1694
1695 if (!i915_pipe_enabled(dev, pipe))
1696 return -EINVAL;
1697
1698 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
7e231dbe 1699 imr = I915_READ(VLV_IMR);
31acc7f5 1700 if (pipe == 0)
7e231dbe 1701 imr &= ~I915_DISPLAY_PIPE_A_VBLANK_INTERRUPT;
31acc7f5 1702 else
7e231dbe 1703 imr &= ~I915_DISPLAY_PIPE_B_VBLANK_INTERRUPT;
7e231dbe 1704 I915_WRITE(VLV_IMR, imr);
31acc7f5
JB		 1705 i915_enable_pipestat(dev_priv, pipe,
1706 PIPE_START_VBLANK_INTERRUPT_ENABLE);
7e231dbe
JB		 1707 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
1708
1709 return 0;
1710}
1711
42f52ef8
KP		 1712/* Called from drm generic code, passed 'crtc' which
1713 * we use as a pipe index
1714 */
f71d4af4 1715static void i915_disable_vblank(struct drm_device *dev, int pipe)
0a3e67a4
JB		 1716{
1717 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
e9d21d7f 1718 unsigned long irqflags;
0a3e67a4 1719
1ec14ad3 1720 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
8692d00e 1721 if (dev_priv->info->gen == 3)
6b26c86d 1722 I915_WRITE(INSTPM, _MASKED_BIT_ENABLE(INSTPM_AGPBUSY_DIS));
8692d00e 1723
f796cf8f
JB		 1724 i915_disable_pipestat(dev_priv, pipe,
1725 PIPE_VBLANK_INTERRUPT_ENABLE |
1726 PIPE_START_VBLANK_INTERRUPT_ENABLE);
1727 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
1728}
1729
f71d4af4 1730static void ironlake_disable_vblank(struct drm_device *dev, int pipe)
f796cf8f
JB		 1731{
1732 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1733 unsigned long irqflags;
1734
1735 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
1736 ironlake_disable_display_irq(dev_priv, (pipe == 0) ?
0206e353 1737 DE_PIPEA_VBLANK : DE_PIPEB_VBLANK);
1ec14ad3 1738 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
0a3e67a4
JB		 1739}
1740
f71d4af4 1741static void ivybridge_disable_vblank(struct drm_device *dev, int pipe)
b1f14ad0
JB		 1742{
1743 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1744 unsigned long irqflags;
1745
1746 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
b615b57a
CW		 1747 ironlake_disable_display_irq(dev_priv,
1748 DE_PIPEA_VBLANK_IVB << (pipe * 5));
b1f14ad0
JB		 1749 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
1750}
1751
7e231dbe
JB		 1752static void valleyview_disable_vblank(struct drm_device *dev, int pipe)
1753{
1754 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1755 unsigned long irqflags;
31acc7f5 1756 u32 imr;
7e231dbe
JB		 1757
1758 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
31acc7f5
JB		 1759 i915_disable_pipestat(dev_priv, pipe,
1760 PIPE_START_VBLANK_INTERRUPT_ENABLE);
7e231dbe 1761 imr = I915_READ(VLV_IMR);
31acc7f5 1762 if (pipe == 0)
7e231dbe 1763 imr |= I915_DISPLAY_PIPE_A_VBLANK_INTERRUPT;
31acc7f5 1764 else
7e231dbe 1765 imr |= I915_DISPLAY_PIPE_B_VBLANK_INTERRUPT;
7e231dbe 1766 I915_WRITE(VLV_IMR, imr);
7e231dbe
JB		 1767 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
1768}
1769
893eead0
CW		 1770static u32
1771ring_last_seqno(struct intel_ring_buffer *ring)
852835f3 1772{
893eead0
CW		 1773 return list_entry(ring->request_list.prev,
1774 struct drm_i915_gem_request, list)->seqno;
1775}
1776
9107e9d2
CW		 1777static bool
1778ring_idle(struct intel_ring_buffer *ring, u32 seqno)
1779{
1780 return (list_empty(&ring->request_list) ||
1781 i915_seqno_passed(seqno, ring_last_seqno(ring)));
f65d9421
BG		 1782}
1783
6274f212
CW		 1784static struct intel_ring_buffer *
1785semaphore_waits_for(struct intel_ring_buffer *ring, u32 *seqno)
a24a11e6
CW		 1786{
1787 struct drm_i915_private *dev_priv = ring->dev->dev_private;
6274f212 1788 u32 cmd, ipehr, acthd, acthd_min;
a24a11e6
CW		 1789
1790 ipehr = I915_READ(RING_IPEHR(ring->mmio_base));
1791 if ((ipehr & ~(0x3 << 16)) !=
1792 (MI_SEMAPHORE_MBOX | MI_SEMAPHORE_COMPARE | MI_SEMAPHORE_REGISTER))
6274f212 1793 return NULL;
a24a11e6
CW		 1794
1795 /* ACTHD is likely pointing to the dword after the actual command,
1796 * so scan backwards until we find the MBOX.
1797 */
6274f212 1798 acthd = intel_ring_get_active_head(ring) & HEAD_ADDR;
a24a11e6
CW		 1799 acthd_min = max((int)acthd - 3 * 4, 0);
1800 do {
1801 cmd = ioread32(ring->virtual_start + acthd);
1802 if (cmd == ipehr)
1803 break;
1804
1805 acthd -= 4;
1806 if (acthd < acthd_min)
6274f212 1807 return NULL;
a24a11e6
CW		 1808 } while (1);
1809
6274f212
CW		 1810 *seqno = ioread32(ring->virtual_start+acthd+4)+1;
1811 return &dev_priv->ring[(ring->id + (((ipehr >> 17) & 1) + 1)) % 3];
a24a11e6
CW		 1812}
1813
6274f212
CW		 1814static int semaphore_passed(struct intel_ring_buffer *ring)
1815{
1816 struct drm_i915_private *dev_priv = ring->dev->dev_private;
1817 struct intel_ring_buffer *signaller;
1818 u32 seqno, ctl;
1819
1820 ring->hangcheck.deadlock = true;
1821
1822 signaller = semaphore_waits_for(ring, &seqno);
1823 if (signaller == NULL || signaller->hangcheck.deadlock)
1824 return -1;
1825
1826 /* cursory check for an unkickable deadlock */
1827 ctl = I915_READ_CTL(signaller);
1828 if (ctl & RING_WAIT_SEMAPHORE && semaphore_passed(signaller) < 0)
1829 return -1;
1830
1831 return i915_seqno_passed(signaller->get_seqno(signaller, false), seqno);
1832}
1833
1834static void semaphore_clear_deadlocks(struct drm_i915_private *dev_priv)
1835{
1836 struct intel_ring_buffer *ring;
1837 int i;
1838
1839 for_each_ring(ring, dev_priv, i)
1840 ring->hangcheck.deadlock = false;
1841}
1842
ad8beaea
MK		 1843static enum intel_ring_hangcheck_action
1844ring_stuck(struct intel_ring_buffer *ring, u32 acthd)
1ec14ad3
CW		 1845{
1846 struct drm_device *dev = ring->dev;
1847 struct drm_i915_private *dev_priv = dev->dev_private;
9107e9d2
CW		 1848 u32 tmp;
1849
6274f212
CW		 1850 if (ring->hangcheck.acthd != acthd)
1851 return active;
1852
9107e9d2 1853 if (IS_GEN2(dev))
6274f212 1854 return hung;
9107e9d2
CW		 1855
1856 /* Is the chip hanging on a WAIT_FOR_EVENT?
1857 * If so we can simply poke the RB_WAIT bit
1858 * and break the hang. This should work on
1859 * all but the second generation chipsets.
1860 */
1861 tmp = I915_READ_CTL(ring);
1ec14ad3
CW		 1862 if (tmp & RING_WAIT) {
1863 DRM_ERROR("Kicking stuck wait on %s\n",
1864 ring->name);
1865 I915_WRITE_CTL(ring, tmp);
6274f212
CW		 1866 return kick;
1867 }
1868
1869 if (INTEL_INFO(dev)->gen >= 6 && tmp & RING_WAIT_SEMAPHORE) {
1870 switch (semaphore_passed(ring)) {
1871 default:
1872 return hung;
1873 case 1:
1874 DRM_ERROR("Kicking stuck semaphore on %s\n",
1875 ring->name);
1876 I915_WRITE_CTL(ring, tmp);
1877 return kick;
1878 case 0:
1879 return wait;
1880 }
9107e9d2 1881 }
ed5cbb03 1882
6274f212 1883 return hung;
ed5cbb03
MK		 1884}
1885
f65d9421
BG		 1886/**
1887 * This is called when the chip hasn't reported back with completed
05407ff8
MK		 1888 * batchbuffers in a long time. We keep track per ring seqno progress and
1889 * if there are no progress, hangcheck score for that ring is increased.
1890 * Further, acthd is inspected to see if the ring is stuck. On stuck case
1891 * we kick the ring. If we see no progress on three subsequent calls
1892 * we assume chip is wedged and try to fix it by resetting the chip.
f65d9421
BG		 1893 */
1894void i915_hangcheck_elapsed(unsigned long data)
1895{
1896 struct drm_device *dev = (struct drm_device *)data;
1897 drm_i915_private_t *dev_priv = dev->dev_private;
b4519513 1898 struct intel_ring_buffer *ring;
b4519513 1899 int i;
05407ff8 1900 int busy_count = 0, rings_hung = 0;
9107e9d2
CW		 1901 bool stuck[I915_NUM_RINGS] = { 0 };
1902#define BUSY 1
1903#define KICK 5
1904#define HUNG 20
1905#define FIRE 30
893eead0 1906
3e0dc6b0
BW		 1907 if (!i915_enable_hangcheck)
1908 return;
1909
b4519513 1910 for_each_ring(ring, dev_priv, i) {
05407ff8 1911 u32 seqno, acthd;
9107e9d2 1912 bool busy = true;
05407ff8 1913
6274f212
CW		 1914 semaphore_clear_deadlocks(dev_priv);
1915
05407ff8
MK		 1916 seqno = ring->get_seqno(ring, false);
1917 acthd = intel_ring_get_active_head(ring);
b4519513 1918
9107e9d2
CW		 1919 if (ring->hangcheck.seqno == seqno) {
1920 if (ring_idle(ring, seqno)) {
1921 if (waitqueue_active(&ring->irq_queue)) {
1922 /* Issue a wake-up to catch stuck h/w. */
1923 DRM_ERROR("Hangcheck timer elapsed... %s idle\n",
1924 ring->name);
1925 wake_up_all(&ring->irq_queue);
1926 ring->hangcheck.score += HUNG;
1927 } else
1928 busy = false;
05407ff8 1929 } else {
9107e9d2
CW		 1930 int score;
1931
6274f212
CW		 1932 /* We always increment the hangcheck score
1933 * if the ring is busy and still processing
1934 * the same request, so that no single request
1935 * can run indefinitely (such as a chain of
1936 * batches). The only time we do not increment
1937 * the hangcheck score on this ring, if this
1938 * ring is in a legitimate wait for another
1939 * ring. In that case the waiting ring is a
1940 * victim and we want to be sure we catch the
1941 * right culprit. Then every time we do kick
1942 * the ring, add a small increment to the
1943 * score so that we can catch a batch that is
1944 * being repeatedly kicked and so responsible
1945 * for stalling the machine.
1946 */
ad8beaea
MK		 1947 ring->hangcheck.action = ring_stuck(ring,
1948 acthd);
1949
1950 switch (ring->hangcheck.action) {
6274f212
CW		 1951 case wait:
1952 score = 0;
1953 break;
1954 case active:
9107e9d2 1955 score = BUSY;
6274f212
CW		 1956 break;
1957 case kick:
1958 score = KICK;
1959 break;
1960 case hung:
1961 score = HUNG;
1962 stuck[i] = true;
1963 break;
1964 }
9107e9d2 1965 ring->hangcheck.score += score;
05407ff8 1966 }
9107e9d2
CW		 1967 } else {
1968 /* Gradually reduce the count so that we catch DoS
1969 * attempts across multiple batches.
1970 */
1971 if (ring->hangcheck.score > 0)
1972 ring->hangcheck.score--;
d1e61e7f
CW		 1973 }
1974
05407ff8
MK		 1975 ring->hangcheck.seqno = seqno;
1976 ring->hangcheck.acthd = acthd;
9107e9d2 1977 busy_count += busy;
893eead0 1978 }
b9201c14 1979
92cab734 1980 for_each_ring(ring, dev_priv, i) {
9107e9d2 1981 if (ring->hangcheck.score > FIRE) {
acd78c11 1982 DRM_ERROR("%s on %s\n",
05407ff8 1983 stuck[i] ? "stuck" : "no progress",
a43adf07
CW		 1984 ring->name);
1985 rings_hung++;
92cab734
MK		 1986 }
1987 }
1988
05407ff8
MK		 1989 if (rings_hung)
1990 return i915_handle_error(dev, true);
f65d9421 1991
05407ff8
MK		 1992 if (busy_count)
1993 /* Reset timer case chip hangs without another request
1994 * being added */
10cd45b6
MK		 1995 i915_queue_hangcheck(dev);
1996}
1997
1998void i915_queue_hangcheck(struct drm_device *dev)
1999{
2000 struct drm_i915_private *dev_priv = dev->dev_private;
2001 if (!i915_enable_hangcheck)
2002 return;
2003
2004 mod_timer(&dev_priv->gpu_error.hangcheck_timer,
2005 round_jiffies_up(jiffies + DRM_I915_HANGCHECK_JIFFIES));
f65d9421
BG		 2006}
2007
91738a95
PZ		 2008static void ibx_irq_preinstall(struct drm_device *dev)
2009{
2010 struct drm_i915_private *dev_priv = dev->dev_private;
2011
2012 if (HAS_PCH_NOP(dev))
2013 return;
2014
2015 /* south display irq */
2016 I915_WRITE(SDEIMR, 0xffffffff);
2017 /*
2018 * SDEIER is also touched by the interrupt handler to work around missed
2019 * PCH interrupts. Hence we can't update it after the interrupt handler
2020 * is enabled - instead we unconditionally enable all PCH interrupt
2021 * sources here, but then only unmask them as needed with SDEIMR.
2022 */
2023 I915_WRITE(SDEIER, 0xffffffff);
2024 POSTING_READ(SDEIER);
2025}
2026
d18ea1b5
DV		 2027static void gen5_gt_irq_preinstall(struct drm_device *dev)
2028{
2029 struct drm_i915_private *dev_priv = dev->dev_private;
2030
2031 /* and GT */
2032 I915_WRITE(GTIMR, 0xffffffff);
2033 I915_WRITE(GTIER, 0x0);
2034 POSTING_READ(GTIER);
2035
2036 if (INTEL_INFO(dev)->gen >= 6) {
2037 /* and PM */
2038 I915_WRITE(GEN6_PMIMR, 0xffffffff);
2039 I915_WRITE(GEN6_PMIER, 0x0);
2040 POSTING_READ(GEN6_PMIER);
2041 }
2042}
2043
1da177e4
LT		 2044/* drm_dma.h hooks
2045*/
f71d4af4 2046static void ironlake_irq_preinstall(struct drm_device *dev)
036a4a7d
ZW		 2047{
2048 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2049
4697995b
JB		 2050 atomic_set(&dev_priv->irq_received, 0);
2051
036a4a7d 2052 I915_WRITE(HWSTAM, 0xeffe);
bdfcdb63 2053
036a4a7d
ZW		 2054 I915_WRITE(DEIMR, 0xffffffff);
2055 I915_WRITE(DEIER, 0x0);
3143a2bf 2056 POSTING_READ(DEIER);
036a4a7d 2057
d18ea1b5 2058 gen5_gt_irq_preinstall(dev);
c650156a 2059
91738a95 2060 ibx_irq_preinstall(dev);
7d99163d
BW		 2061}
2062
7e231dbe
JB		 2063static void valleyview_irq_preinstall(struct drm_device *dev)
2064{
2065 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2066 int pipe;
2067
2068 atomic_set(&dev_priv->irq_received, 0);
2069
7e231dbe
JB		 2070 /* VLV magic */
2071 I915_WRITE(VLV_IMR, 0);
2072 I915_WRITE(RING_IMR(RENDER_RING_BASE), 0);
2073 I915_WRITE(RING_IMR(GEN6_BSD_RING_BASE), 0);
2074 I915_WRITE(RING_IMR(BLT_RING_BASE), 0);
2075
7e231dbe
JB		 2076 /* and GT */
2077 I915_WRITE(GTIIR, I915_READ(GTIIR));
2078 I915_WRITE(GTIIR, I915_READ(GTIIR));
d18ea1b5
DV		 2079
2080 gen5_gt_irq_preinstall(dev);
7e231dbe
JB		 2081
2082 I915_WRITE(DPINVGTT, 0xff);
2083
2084 I915_WRITE(PORT_HOTPLUG_EN, 0);
2085 I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
2086 for_each_pipe(pipe)
2087 I915_WRITE(PIPESTAT(pipe), 0xffff);
2088 I915_WRITE(VLV_IIR, 0xffffffff);
2089 I915_WRITE(VLV_IMR, 0xffffffff);
2090 I915_WRITE(VLV_IER, 0x0);
2091 POSTING_READ(VLV_IER);
2092}
2093
82a28bcf 2094static void ibx_hpd_irq_setup(struct drm_device *dev)
7fe0b973
KP		 2095{
2096 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
82a28bcf
DV		 2097 struct drm_mode_config *mode_config = &dev->mode_config;
2098 struct intel_encoder *intel_encoder;
fee884ed 2099 u32 hotplug_irqs, hotplug, enabled_irqs = 0;
82a28bcf
DV		 2100
2101 if (HAS_PCH_IBX(dev)) {
fee884ed 2102 hotplug_irqs = SDE_HOTPLUG_MASK;
82a28bcf 2103 list_for_each_entry(intel_encoder, &mode_config->encoder_list, base.head)
cd569aed 2104 if (dev_priv->hpd_stats[intel_encoder->hpd_pin].hpd_mark == HPD_ENABLED)
fee884ed 2105 enabled_irqs |= hpd_ibx[intel_encoder->hpd_pin];
82a28bcf 2106 } else {
fee884ed 2107 hotplug_irqs = SDE_HOTPLUG_MASK_CPT;
82a28bcf 2108 list_for_each_entry(intel_encoder, &mode_config->encoder_list, base.head)
cd569aed 2109 if (dev_priv->hpd_stats[intel_encoder->hpd_pin].hpd_mark == HPD_ENABLED)
fee884ed 2110 enabled_irqs |= hpd_cpt[intel_encoder->hpd_pin];
82a28bcf 2111 }
7fe0b973 2112
fee884ed 2113 ibx_display_interrupt_update(dev_priv, hotplug_irqs, enabled_irqs);
82a28bcf
DV		 2114
2115 /*
2116 * Enable digital hotplug on the PCH, and configure the DP short pulse
2117 * duration to 2ms (which is the minimum in the Display Port spec)
2118 *
2119 * This register is the same on all known PCH chips.
2120 */
7fe0b973
KP		 2121 hotplug = I915_READ(PCH_PORT_HOTPLUG);
2122 hotplug &= ~(PORTD_PULSE_DURATION_MASK|PORTC_PULSE_DURATION_MASK|PORTB_PULSE_DURATION_MASK);
2123 hotplug |= PORTD_HOTPLUG_ENABLE | PORTD_PULSE_DURATION_2ms;
2124 hotplug |= PORTC_HOTPLUG_ENABLE | PORTC_PULSE_DURATION_2ms;
2125 hotplug |= PORTB_HOTPLUG_ENABLE | PORTB_PULSE_DURATION_2ms;
2126 I915_WRITE(PCH_PORT_HOTPLUG, hotplug);
2127}
2128
d46da437
PZ		 2129static void ibx_irq_postinstall(struct drm_device *dev)
2130{
2131 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
82a28bcf 2132 u32 mask;
e5868a31 2133
692a04cf
DV		 2134 if (HAS_PCH_NOP(dev))
2135 return;
2136
8664281b
PZ		 2137 if (HAS_PCH_IBX(dev)) {
2138 mask = SDE_GMBUS | SDE_AUX_MASK | SDE_TRANSB_FIFO_UNDER |
de032bf4 2139 SDE_TRANSA_FIFO_UNDER | SDE_POISON;
8664281b
PZ		 2140 } else {
2141 mask = SDE_GMBUS_CPT | SDE_AUX_MASK_CPT | SDE_ERROR_CPT;
2142
2143 I915_WRITE(SERR_INT, I915_READ(SERR_INT));
2144 }
ab5c608b 2145
d46da437
PZ		 2146 I915_WRITE(SDEIIR, I915_READ(SDEIIR));
2147 I915_WRITE(SDEIMR, ~mask);
d46da437
PZ		 2148}
2149
0a9a8c91
DV		 2150static void gen5_gt_irq_postinstall(struct drm_device *dev)
2151{
2152 struct drm_i915_private *dev_priv = dev->dev_private;
2153 u32 pm_irqs, gt_irqs;
2154
2155 pm_irqs = gt_irqs = 0;
2156
2157 dev_priv->gt_irq_mask = ~0;
2158 if (HAS_L3_GPU_CACHE(dev)) {
2159 /* L3 parity interrupt is always unmasked. */
2160 dev_priv->gt_irq_mask = ~GT_RENDER_L3_PARITY_ERROR_INTERRUPT;
2161 gt_irqs |= GT_RENDER_L3_PARITY_ERROR_INTERRUPT;
2162 }
2163
2164 gt_irqs |= GT_RENDER_USER_INTERRUPT;
2165 if (IS_GEN5(dev)) {
2166 gt_irqs |= GT_RENDER_PIPECTL_NOTIFY_INTERRUPT |
2167 ILK_BSD_USER_INTERRUPT;
2168 } else {
2169 gt_irqs |= GT_BLT_USER_INTERRUPT | GT_BSD_USER_INTERRUPT;
2170 }
2171
2172 I915_WRITE(GTIIR, I915_READ(GTIIR));
2173 I915_WRITE(GTIMR, dev_priv->gt_irq_mask);
2174 I915_WRITE(GTIER, gt_irqs);
2175 POSTING_READ(GTIER);
2176
2177 if (INTEL_INFO(dev)->gen >= 6) {
2178 pm_irqs |= GEN6_PM_RPS_EVENTS;
2179
2180 if (HAS_VEBOX(dev))
2181 pm_irqs |= PM_VEBOX_USER_INTERRUPT;
2182
2183 I915_WRITE(GEN6_PMIIR, I915_READ(GEN6_PMIIR));
2184 I915_WRITE(GEN6_PMIMR, 0xffffffff);
2185 I915_WRITE(GEN6_PMIER, pm_irqs);
2186 POSTING_READ(GEN6_PMIER);
2187 }
2188}
2189
f71d4af4 2190static int ironlake_irq_postinstall(struct drm_device *dev)
036a4a7d 2191{
4bc9d430
DV		 2192 unsigned long irqflags;
2193
036a4a7d
ZW		 2194 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2195 /* enable kind of interrupts always enabled */
013d5aa2 2196 u32 display_mask = DE_MASTER_IRQ_CONTROL | DE_GSE | DE_PCH_EVENT |
ce99c256 2197 DE_PLANEA_FLIP_DONE | DE_PLANEB_FLIP_DONE |
8664281b 2198 DE_AUX_CHANNEL_A | DE_PIPEB_FIFO_UNDERRUN |
de032bf4 2199 DE_PIPEA_FIFO_UNDERRUN | DE_POISON;
036a4a7d 2200
1ec14ad3 2201 dev_priv->irq_mask = ~display_mask;
036a4a7d
ZW		 2202
2203 /* should always can generate irq */
2204 I915_WRITE(DEIIR, I915_READ(DEIIR));
1ec14ad3 2205 I915_WRITE(DEIMR, dev_priv->irq_mask);
6005ce42
DV		 2206 I915_WRITE(DEIER, display_mask |
2207 DE_PIPEA_VBLANK | DE_PIPEB_VBLANK | DE_PCU_EVENT);
3143a2bf 2208 POSTING_READ(DEIER);
036a4a7d 2209
0a9a8c91 2210 gen5_gt_irq_postinstall(dev);
036a4a7d 2211
d46da437 2212 ibx_irq_postinstall(dev);
7fe0b973 2213
f97108d1 2214 if (IS_IRONLAKE_M(dev)) {
6005ce42
DV		 2215 /* Enable PCU event interrupts
2216 *
2217 * spinlocking not required here for correctness since interrupt
4bc9d430
DV		 2218 * setup is guaranteed to run in single-threaded context. But we
2219 * need it to make the assert_spin_locked happy. */
2220 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
f97108d1 2221 ironlake_enable_display_irq(dev_priv, DE_PCU_EVENT);
4bc9d430 2222 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
f97108d1
JB		 2223 }
2224
036a4a7d
ZW		 2225 return 0;
2226}
2227
f71d4af4 2228static int ivybridge_irq_postinstall(struct drm_device *dev)
b1f14ad0
JB		 2229{
2230 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2231 /* enable kind of interrupts always enabled */
b615b57a
CW		 2232 u32 display_mask =
2233 DE_MASTER_IRQ_CONTROL | DE_GSE_IVB | DE_PCH_EVENT_IVB |
2234 DE_PLANEC_FLIP_DONE_IVB |
2235 DE_PLANEB_FLIP_DONE_IVB |
ce99c256 2236 DE_PLANEA_FLIP_DONE_IVB |
8664281b
PZ		 2237 DE_AUX_CHANNEL_A_IVB |
2238 DE_ERR_INT_IVB;
b1f14ad0 2239
b1f14ad0
JB		 2240 dev_priv->irq_mask = ~display_mask;
2241
2242 /* should always can generate irq */
8664281b 2243 I915_WRITE(GEN7_ERR_INT, I915_READ(GEN7_ERR_INT));
b1f14ad0
JB		 2244 I915_WRITE(DEIIR, I915_READ(DEIIR));
2245 I915_WRITE(DEIMR, dev_priv->irq_mask);
b615b57a
CW		 2246 I915_WRITE(DEIER,
2247 display_mask |
2248 DE_PIPEC_VBLANK_IVB |
2249 DE_PIPEB_VBLANK_IVB |
2250 DE_PIPEA_VBLANK_IVB);
b1f14ad0
JB		 2251 POSTING_READ(DEIER);
2252
0a9a8c91 2253 gen5_gt_irq_postinstall(dev);
eda63ffb 2254
d46da437 2255 ibx_irq_postinstall(dev);
7fe0b973 2256
b1f14ad0
JB		 2257 return 0;
2258}
2259
7e231dbe
JB		 2260static int valleyview_irq_postinstall(struct drm_device *dev)
2261{
2262 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
7e231dbe 2263 u32 enable_mask;
31acc7f5 2264 u32 pipestat_enable = PLANE_FLIP_DONE_INT_EN_VLV;
b79480ba 2265 unsigned long irqflags;
7e231dbe
JB		 2266
2267 enable_mask = I915_DISPLAY_PORT_INTERRUPT;
31acc7f5
JB		 2268 enable_mask |= I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
2269 I915_DISPLAY_PIPE_A_VBLANK_INTERRUPT |
2270 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
7e231dbe
JB		 2271 I915_DISPLAY_PIPE_B_VBLANK_INTERRUPT;
2272
31acc7f5
JB		 2273 /*
2274 *Leave vblank interrupts masked initially. enable/disable will
2275 * toggle them based on usage.
2276 */
2277 dev_priv->irq_mask = (~enable_mask) |
2278 I915_DISPLAY_PIPE_A_VBLANK_INTERRUPT |
2279 I915_DISPLAY_PIPE_B_VBLANK_INTERRUPT;
7e231dbe 2280
20afbda2
DV		 2281 I915_WRITE(PORT_HOTPLUG_EN, 0);
2282 POSTING_READ(PORT_HOTPLUG_EN);
2283
7e231dbe
JB		 2284 I915_WRITE(VLV_IMR, dev_priv->irq_mask);
2285 I915_WRITE(VLV_IER, enable_mask);
2286 I915_WRITE(VLV_IIR, 0xffffffff);
2287 I915_WRITE(PIPESTAT(0), 0xffff);
2288 I915_WRITE(PIPESTAT(1), 0xffff);
2289 POSTING_READ(VLV_IER);
2290
b79480ba
DV		 2291 /* Interrupt setup is already guaranteed to be single-threaded, this is
2292 * just to make the assert_spin_locked check happy. */
2293 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
31acc7f5 2294 i915_enable_pipestat(dev_priv, 0, pipestat_enable);
515ac2bb 2295 i915_enable_pipestat(dev_priv, 0, PIPE_GMBUS_EVENT_ENABLE);
31acc7f5 2296 i915_enable_pipestat(dev_priv, 1, pipestat_enable);
b79480ba 2297 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
31acc7f5 2298
7e231dbe
JB		 2299 I915_WRITE(VLV_IIR, 0xffffffff);
2300 I915_WRITE(VLV_IIR, 0xffffffff);
2301
0a9a8c91 2302 gen5_gt_irq_postinstall(dev);
7e231dbe
JB		 2303
2304 /* ack & enable invalid PTE error interrupts */
2305#if 0 /* FIXME: add support to irq handler for checking these bits */
2306 I915_WRITE(DPINVGTT, DPINVGTT_STATUS_MASK);
2307 I915_WRITE(DPINVGTT, DPINVGTT_EN_MASK);
2308#endif
2309
2310 I915_WRITE(VLV_MASTER_IER, MASTER_INTERRUPT_ENABLE);
20afbda2
DV		 2311
2312 return 0;
2313}
2314
7e231dbe
JB		 2315static void valleyview_irq_uninstall(struct drm_device *dev)
2316{
2317 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2318 int pipe;
2319
2320 if (!dev_priv)
2321 return;
2322
ac4c16c5
EE		 2323 del_timer_sync(&dev_priv->hotplug_reenable_timer);
2324
7e231dbe
JB		 2325 for_each_pipe(pipe)
2326 I915_WRITE(PIPESTAT(pipe), 0xffff);
2327
2328 I915_WRITE(HWSTAM, 0xffffffff);
2329 I915_WRITE(PORT_HOTPLUG_EN, 0);
2330 I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
2331 for_each_pipe(pipe)
2332 I915_WRITE(PIPESTAT(pipe), 0xffff);
2333 I915_WRITE(VLV_IIR, 0xffffffff);
2334 I915_WRITE(VLV_IMR, 0xffffffff);
2335 I915_WRITE(VLV_IER, 0x0);
2336 POSTING_READ(VLV_IER);
2337}
2338
f71d4af4 2339static void ironlake_irq_uninstall(struct drm_device *dev)
036a4a7d
ZW		 2340{
2341 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
4697995b
JB		 2342
2343 if (!dev_priv)
2344 return;
2345
ac4c16c5
EE		 2346 del_timer_sync(&dev_priv->hotplug_reenable_timer);
2347
036a4a7d
ZW		 2348 I915_WRITE(HWSTAM, 0xffffffff);
2349
2350 I915_WRITE(DEIMR, 0xffffffff);
2351 I915_WRITE(DEIER, 0x0);
2352 I915_WRITE(DEIIR, I915_READ(DEIIR));
8664281b
PZ		 2353 if (IS_GEN7(dev))
2354 I915_WRITE(GEN7_ERR_INT, I915_READ(GEN7_ERR_INT));
036a4a7d
ZW		 2355
2356 I915_WRITE(GTIMR, 0xffffffff);
2357 I915_WRITE(GTIER, 0x0);
2358 I915_WRITE(GTIIR, I915_READ(GTIIR));
192aac1f 2359
ab5c608b
BW		 2360 if (HAS_PCH_NOP(dev))
2361 return;
2362
192aac1f
KP		 2363 I915_WRITE(SDEIMR, 0xffffffff);
2364 I915_WRITE(SDEIER, 0x0);
2365 I915_WRITE(SDEIIR, I915_READ(SDEIIR));
8664281b
PZ		 2366 if (HAS_PCH_CPT(dev) || HAS_PCH_LPT(dev))
2367 I915_WRITE(SERR_INT, I915_READ(SERR_INT));
036a4a7d
ZW		 2368}
2369
a266c7d5 2370static void i8xx_irq_preinstall(struct drm_device * dev)
1da177e4
LT		 2371{
2372 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
9db4a9c7 2373 int pipe;
91e3738e 2374
a266c7d5 2375 atomic_set(&dev_priv->irq_received, 0);
5ca58282 2376
9db4a9c7
JB		 2377 for_each_pipe(pipe)
2378 I915_WRITE(PIPESTAT(pipe), 0);
a266c7d5
CW		 2379 I915_WRITE16(IMR, 0xffff);
2380 I915_WRITE16(IER, 0x0);
2381 POSTING_READ16(IER);
c2798b19
CW		 2382}
2383
2384static int i8xx_irq_postinstall(struct drm_device *dev)
2385{
2386 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2387
c2798b19
CW		 2388 I915_WRITE16(EMR,
2389 ~(I915_ERROR_PAGE_TABLE | I915_ERROR_MEMORY_REFRESH));
2390
2391 /* Unmask the interrupts that we always want on. */
2392 dev_priv->irq_mask =
2393 ~(I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
2394 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
2395 I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
2396 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT |
2397 I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT);
2398 I915_WRITE16(IMR, dev_priv->irq_mask);
2399
2400 I915_WRITE16(IER,
2401 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
2402 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
2403 I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT |
2404 I915_USER_INTERRUPT);
2405 POSTING_READ16(IER);
2406
2407 return 0;
2408}
2409
90a72f87
VS		 2410/*
2411 * Returns true when a page flip has completed.
2412 */
2413static bool i8xx_handle_vblank(struct drm_device *dev,
2414 int pipe, u16 iir)
2415{
2416 drm_i915_private_t *dev_priv = dev->dev_private;
2417 u16 flip_pending = DISPLAY_PLANE_FLIP_PENDING(pipe);
2418
2419 if (!drm_handle_vblank(dev, pipe))
2420 return false;
2421
2422 if ((iir & flip_pending) == 0)
2423 return false;
2424
2425 intel_prepare_page_flip(dev, pipe);
2426
2427 /* We detect FlipDone by looking for the change in PendingFlip from '1'
2428 * to '0' on the following vblank, i.e. IIR has the Pendingflip
2429 * asserted following the MI_DISPLAY_FLIP, but ISR is deasserted, hence
2430 * the flip is completed (no longer pending). Since this doesn't raise
2431 * an interrupt per se, we watch for the change at vblank.
2432 */
2433 if (I915_READ16(ISR) & flip_pending)
2434 return false;
2435
2436 intel_finish_page_flip(dev, pipe);
2437
2438 return true;
2439}
2440
ff1f525e 2441static irqreturn_t i8xx_irq_handler(int irq, void *arg)
c2798b19
CW		 2442{
2443 struct drm_device *dev = (struct drm_device *) arg;
2444 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
c2798b19
CW		 2445 u16 iir, new_iir;
2446 u32 pipe_stats[2];
2447 unsigned long irqflags;
2448 int irq_received;
2449 int pipe;
2450 u16 flip_mask =
2451 I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
2452 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT;
2453
2454 atomic_inc(&dev_priv->irq_received);
2455
2456 iir = I915_READ16(IIR);
2457 if (iir == 0)
2458 return IRQ_NONE;
2459
2460 while (iir & ~flip_mask) {
2461 /* Can't rely on pipestat interrupt bit in iir as it might
2462 * have been cleared after the pipestat interrupt was received.
2463 * It doesn't set the bit in iir again, but it still produces
2464 * interrupts (for non-MSI).
2465 */
2466 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
2467 if (iir & I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT)
2468 i915_handle_error(dev, false);
2469
2470 for_each_pipe(pipe) {
2471 int reg = PIPESTAT(pipe);
2472 pipe_stats[pipe] = I915_READ(reg);
2473
2474 /*
2475 * Clear the PIPE*STAT regs before the IIR
2476 */
2477 if (pipe_stats[pipe] & 0x8000ffff) {
2478 if (pipe_stats[pipe] & PIPE_FIFO_UNDERRUN_STATUS)
2479 DRM_DEBUG_DRIVER("pipe %c underrun\n",
2480 pipe_name(pipe));
2481 I915_WRITE(reg, pipe_stats[pipe]);
2482 irq_received = 1;
2483 }
2484 }
2485 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
2486
2487 I915_WRITE16(IIR, iir & ~flip_mask);
2488 new_iir = I915_READ16(IIR); /* Flush posted writes */
2489
d05c617e 2490 i915_update_dri1_breadcrumb(dev);
c2798b19
CW		 2491
2492 if (iir & I915_USER_INTERRUPT)
2493 notify_ring(dev, &dev_priv->ring[RCS]);
2494
2495 if (pipe_stats[0] & PIPE_VBLANK_INTERRUPT_STATUS &&
90a72f87
VS		 2496 i8xx_handle_vblank(dev, 0, iir))
2497 flip_mask &= ~DISPLAY_PLANE_FLIP_PENDING(0);
c2798b19
CW		 2498
2499 if (pipe_stats[1] & PIPE_VBLANK_INTERRUPT_STATUS &&
90a72f87
VS		 2500 i8xx_handle_vblank(dev, 1, iir))
2501 flip_mask &= ~DISPLAY_PLANE_FLIP_PENDING(1);
c2798b19
CW		 2502
2503 iir = new_iir;
2504 }
2505
2506 return IRQ_HANDLED;
2507}
2508
2509static void i8xx_irq_uninstall(struct drm_device * dev)
2510{
2511 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2512 int pipe;
2513
c2798b19
CW		 2514 for_each_pipe(pipe) {
2515 /* Clear enable bits; then clear status bits */
2516 I915_WRITE(PIPESTAT(pipe), 0);
2517 I915_WRITE(PIPESTAT(pipe), I915_READ(PIPESTAT(pipe)));
2518 }
2519 I915_WRITE16(IMR, 0xffff);
2520 I915_WRITE16(IER, 0x0);
2521 I915_WRITE16(IIR, I915_READ16(IIR));
2522}
2523
a266c7d5
CW		 2524static void i915_irq_preinstall(struct drm_device * dev)
2525{
2526 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2527 int pipe;
2528
2529 atomic_set(&dev_priv->irq_received, 0);
2530
2531 if (I915_HAS_HOTPLUG(dev)) {
2532 I915_WRITE(PORT_HOTPLUG_EN, 0);
2533 I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
2534 }
2535
00d98ebd 2536 I915_WRITE16(HWSTAM, 0xeffe);
a266c7d5
CW		 2537 for_each_pipe(pipe)
2538 I915_WRITE(PIPESTAT(pipe), 0);
2539 I915_WRITE(IMR, 0xffffffff);
2540 I915_WRITE(IER, 0x0);
2541 POSTING_READ(IER);
2542}
2543
2544static int i915_irq_postinstall(struct drm_device *dev)
2545{
2546 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
38bde180 2547 u32 enable_mask;
a266c7d5 2548
38bde180
CW		 2549 I915_WRITE(EMR, ~(I915_ERROR_PAGE_TABLE | I915_ERROR_MEMORY_REFRESH));
2550
2551 /* Unmask the interrupts that we always want on. */
2552 dev_priv->irq_mask =
2553 ~(I915_ASLE_INTERRUPT |
2554 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
2555 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
2556 I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
2557 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT |
2558 I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT);
2559
2560 enable_mask =
2561 I915_ASLE_INTERRUPT |
2562 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
2563 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
2564 I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT |
2565 I915_USER_INTERRUPT;
2566
a266c7d5 2567 if (I915_HAS_HOTPLUG(dev)) {
20afbda2
DV		 2568 I915_WRITE(PORT_HOTPLUG_EN, 0);
2569 POSTING_READ(PORT_HOTPLUG_EN);
2570
a266c7d5
CW		 2571 /* Enable in IER... */
2572 enable_mask |= I915_DISPLAY_PORT_INTERRUPT;
2573 /* and unmask in IMR */
2574 dev_priv->irq_mask &= ~I915_DISPLAY_PORT_INTERRUPT;
2575 }
2576
a266c7d5
CW		 2577 I915_WRITE(IMR, dev_priv->irq_mask);
2578 I915_WRITE(IER, enable_mask);
2579 POSTING_READ(IER);
2580
f49e38dd 2581 i915_enable_asle_pipestat(dev);
20afbda2
DV		 2582
2583 return 0;
2584}
2585
90a72f87
VS		 2586/*
2587 * Returns true when a page flip has completed.
2588 */
2589static bool i915_handle_vblank(struct drm_device *dev,
2590 int plane, int pipe, u32 iir)
2591{
2592 drm_i915_private_t *dev_priv = dev->dev_private;
2593 u32 flip_pending = DISPLAY_PLANE_FLIP_PENDING(plane);
2594
2595 if (!drm_handle_vblank(dev, pipe))
2596 return false;
2597
2598 if ((iir & flip_pending) == 0)
2599 return false;
2600
2601 intel_prepare_page_flip(dev, plane);
2602
2603 /* We detect FlipDone by looking for the change in PendingFlip from '1'
2604 * to '0' on the following vblank, i.e. IIR has the Pendingflip
2605 * asserted following the MI_DISPLAY_FLIP, but ISR is deasserted, hence
2606 * the flip is completed (no longer pending). Since this doesn't raise
2607 * an interrupt per se, we watch for the change at vblank.
2608 */
2609 if (I915_READ(ISR) & flip_pending)
2610 return false;
2611
2612 intel_finish_page_flip(dev, pipe);
2613
2614 return true;
2615}
2616
ff1f525e 2617static irqreturn_t i915_irq_handler(int irq, void *arg)
a266c7d5
CW		 2618{
2619 struct drm_device *dev = (struct drm_device *) arg;
2620 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
8291ee90 2621 u32 iir, new_iir, pipe_stats[I915_MAX_PIPES];
a266c7d5 2622 unsigned long irqflags;
38bde180
CW		 2623 u32 flip_mask =
2624 I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
2625 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT;
38bde180 2626 int pipe, ret = IRQ_NONE;
a266c7d5
CW		 2627
2628 atomic_inc(&dev_priv->irq_received);
2629
2630 iir = I915_READ(IIR);
38bde180
CW		 2631 do {
2632 bool irq_received = (iir & ~flip_mask) != 0;
8291ee90 2633 bool blc_event = false;
a266c7d5
CW		 2634
2635 /* Can't rely on pipestat interrupt bit in iir as it might
2636 * have been cleared after the pipestat interrupt was received.
2637 * It doesn't set the bit in iir again, but it still produces
2638 * interrupts (for non-MSI).
2639 */
2640 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
2641 if (iir & I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT)
2642 i915_handle_error(dev, false);
2643
2644 for_each_pipe(pipe) {
2645 int reg = PIPESTAT(pipe);
2646 pipe_stats[pipe] = I915_READ(reg);
2647
38bde180 2648 /* Clear the PIPE*STAT regs before the IIR */
a266c7d5
CW		 2649 if (pipe_stats[pipe] & 0x8000ffff) {
2650 if (pipe_stats[pipe] & PIPE_FIFO_UNDERRUN_STATUS)
2651 DRM_DEBUG_DRIVER("pipe %c underrun\n",
2652 pipe_name(pipe));
2653 I915_WRITE(reg, pipe_stats[pipe]);
38bde180 2654 irq_received = true;
a266c7d5
CW		 2655 }
2656 }
2657 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
2658
2659 if (!irq_received)
2660 break;
2661
a266c7d5
CW		 2662 /* Consume port. Then clear IIR or we'll miss events */
2663 if ((I915_HAS_HOTPLUG(dev)) &&
2664 (iir & I915_DISPLAY_PORT_INTERRUPT)) {
2665 u32 hotplug_status = I915_READ(PORT_HOTPLUG_STAT);
b543fb04 2666 u32 hotplug_trigger = hotplug_status & HOTPLUG_INT_STATUS_I915;
a266c7d5
CW		 2667
2668 DRM_DEBUG_DRIVER("hotplug event received, stat 0x%08x\n",
2669 hotplug_status);
91d131d2
DV		 2670
2671 intel_hpd_irq_handler(dev, hotplug_trigger, hpd_status_i915);
2672
a266c7d5 2673 I915_WRITE(PORT_HOTPLUG_STAT, hotplug_status);
38bde180 2674 POSTING_READ(PORT_HOTPLUG_STAT);
a266c7d5
CW		 2675 }
2676
38bde180 2677 I915_WRITE(IIR, iir & ~flip_mask);
a266c7d5
CW		 2678 new_iir = I915_READ(IIR); /* Flush posted writes */
2679
a266c7d5
CW		 2680 if (iir & I915_USER_INTERRUPT)
2681 notify_ring(dev, &dev_priv->ring[RCS]);
a266c7d5 2682
a266c7d5 2683 for_each_pipe(pipe) {
38bde180
CW		 2684 int plane = pipe;
2685 if (IS_MOBILE(dev))
2686 plane = !plane;
90a72f87 2687
8291ee90 2688 if (pipe_stats[pipe] & PIPE_VBLANK_INTERRUPT_STATUS &&
90a72f87
VS		 2689 i915_handle_vblank(dev, plane, pipe, iir))
2690 flip_mask &= ~DISPLAY_PLANE_FLIP_PENDING(plane);
a266c7d5
CW		 2691
2692 if (pipe_stats[pipe] & PIPE_LEGACY_BLC_EVENT_STATUS)
2693 blc_event = true;
2694 }
2695
a266c7d5
CW		 2696 if (blc_event || (iir & I915_ASLE_INTERRUPT))
2697 intel_opregion_asle_intr(dev);
2698
2699 /* With MSI, interrupts are only generated when iir
2700 * transitions from zero to nonzero. If another bit got
2701 * set while we were handling the existing iir bits, then
2702 * we would never get another interrupt.
2703 *
2704 * This is fine on non-MSI as well, as if we hit this path
2705 * we avoid exiting the interrupt handler only to generate
2706 * another one.
2707 *
2708 * Note that for MSI this could cause a stray interrupt report
2709 * if an interrupt landed in the time between writing IIR and
2710 * the posting read. This should be rare enough to never
2711 * trigger the 99% of 100,000 interrupts test for disabling
2712 * stray interrupts.
2713 */
38bde180 2714 ret = IRQ_HANDLED;
a266c7d5 2715 iir = new_iir;
38bde180 2716 } while (iir & ~flip_mask);
a266c7d5 2717
d05c617e 2718 i915_update_dri1_breadcrumb(dev);
8291ee90 2719
a266c7d5
CW		 2720 return ret;
2721}
2722
2723static void i915_irq_uninstall(struct drm_device * dev)
2724{
2725 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2726 int pipe;
2727
ac4c16c5
EE		 2728 del_timer_sync(&dev_priv->hotplug_reenable_timer);
2729
a266c7d5
CW		 2730 if (I915_HAS_HOTPLUG(dev)) {
2731 I915_WRITE(PORT_HOTPLUG_EN, 0);
2732 I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
2733 }
2734
00d98ebd 2735 I915_WRITE16(HWSTAM, 0xffff);
55b39755
CW		 2736 for_each_pipe(pipe) {
2737 /* Clear enable bits; then clear status bits */
a266c7d5 2738 I915_WRITE(PIPESTAT(pipe), 0);
55b39755
CW		 2739 I915_WRITE(PIPESTAT(pipe), I915_READ(PIPESTAT(pipe)));
2740 }
a266c7d5
CW		 2741 I915_WRITE(IMR, 0xffffffff);
2742 I915_WRITE(IER, 0x0);
2743
a266c7d5
CW		 2744 I915_WRITE(IIR, I915_READ(IIR));
2745}
2746
2747static void i965_irq_preinstall(struct drm_device * dev)
2748{
2749 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2750 int pipe;
2751
2752 atomic_set(&dev_priv->irq_received, 0);
2753
adca4730
CW		 2754 I915_WRITE(PORT_HOTPLUG_EN, 0);
2755 I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
a266c7d5
CW		 2756
2757 I915_WRITE(HWSTAM, 0xeffe);
2758 for_each_pipe(pipe)
2759 I915_WRITE(PIPESTAT(pipe), 0);
2760 I915_WRITE(IMR, 0xffffffff);
2761 I915_WRITE(IER, 0x0);
2762 POSTING_READ(IER);
2763}
2764
2765static int i965_irq_postinstall(struct drm_device *dev)
2766{
2767 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
bbba0a97 2768 u32 enable_mask;
a266c7d5 2769 u32 error_mask;
b79480ba 2770 unsigned long irqflags;
a266c7d5 2771
a266c7d5 2772 /* Unmask the interrupts that we always want on. */
bbba0a97 2773 dev_priv->irq_mask = ~(I915_ASLE_INTERRUPT |
adca4730 2774 I915_DISPLAY_PORT_INTERRUPT |
bbba0a97
CW		 2775 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
2776 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
2777 I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
2778 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT |
2779 I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT);
2780
2781 enable_mask = ~dev_priv->irq_mask;
21ad8330
VS		 2782 enable_mask &= ~(I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
2783 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT);
bbba0a97
CW		 2784 enable_mask |= I915_USER_INTERRUPT;
2785
2786 if (IS_G4X(dev))
2787 enable_mask |= I915_BSD_USER_INTERRUPT;
a266c7d5 2788
b79480ba
DV		 2789 /* Interrupt setup is already guaranteed to be single-threaded, this is
2790 * just to make the assert_spin_locked check happy. */
2791 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
515ac2bb 2792 i915_enable_pipestat(dev_priv, 0, PIPE_GMBUS_EVENT_ENABLE);
b79480ba 2793 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
a266c7d5 2794
a266c7d5
CW		 2795 /*
2796 * Enable some error detection, note the instruction error mask
2797 * bit is reserved, so we leave it masked.
2798 */
2799 if (IS_G4X(dev)) {
2800 error_mask = ~(GM45_ERROR_PAGE_TABLE |
2801 GM45_ERROR_MEM_PRIV |
2802 GM45_ERROR_CP_PRIV |
2803 I915_ERROR_MEMORY_REFRESH);
2804 } else {
2805 error_mask = ~(I915_ERROR_PAGE_TABLE |
2806 I915_ERROR_MEMORY_REFRESH);
2807 }
2808 I915_WRITE(EMR, error_mask);
2809
2810 I915_WRITE(IMR, dev_priv->irq_mask);
2811 I915_WRITE(IER, enable_mask);
2812 POSTING_READ(IER);
2813
20afbda2
DV		 2814 I915_WRITE(PORT_HOTPLUG_EN, 0);
2815 POSTING_READ(PORT_HOTPLUG_EN);
2816
f49e38dd 2817 i915_enable_asle_pipestat(dev);
20afbda2
DV		 2818
2819 return 0;
2820}
2821
bac56d5b 2822static void i915_hpd_irq_setup(struct drm_device *dev)
20afbda2
DV		 2823{
2824 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
e5868a31 2825 struct drm_mode_config *mode_config = &dev->mode_config;
cd569aed 2826 struct intel_encoder *intel_encoder;
20afbda2
DV		 2827 u32 hotplug_en;
2828
b5ea2d56
DV		 2829 assert_spin_locked(&dev_priv->irq_lock);
2830
bac56d5b
EE		 2831 if (I915_HAS_HOTPLUG(dev)) {
2832 hotplug_en = I915_READ(PORT_HOTPLUG_EN);
2833 hotplug_en &= ~HOTPLUG_INT_EN_MASK;
2834 /* Note HDMI and DP share hotplug bits */
e5868a31 2835 /* enable bits are the same for all generations */
cd569aed
EE		 2836 list_for_each_entry(intel_encoder, &mode_config->encoder_list, base.head)
2837 if (dev_priv->hpd_stats[intel_encoder->hpd_pin].hpd_mark == HPD_ENABLED)
2838 hotplug_en |= hpd_mask_i915[intel_encoder->hpd_pin];
bac56d5b
EE		 2839 /* Programming the CRT detection parameters tends
2840 to generate a spurious hotplug event about three
2841 seconds later. So just do it once.
2842 */
2843 if (IS_G4X(dev))
2844 hotplug_en |= CRT_HOTPLUG_ACTIVATION_PERIOD_64;
85fc95ba 2845 hotplug_en &= ~CRT_HOTPLUG_VOLTAGE_COMPARE_MASK;
bac56d5b 2846 hotplug_en |= CRT_HOTPLUG_VOLTAGE_COMPARE_50;
a266c7d5 2847
bac56d5b
EE		 2848 /* Ignore TV since it's buggy */
2849 I915_WRITE(PORT_HOTPLUG_EN, hotplug_en);
2850 }
a266c7d5
CW		 2851}
2852
ff1f525e 2853static irqreturn_t i965_irq_handler(int irq, void *arg)
a266c7d5
CW		 2854{
2855 struct drm_device *dev = (struct drm_device *) arg;
2856 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
a266c7d5
CW		 2857 u32 iir, new_iir;
2858 u32 pipe_stats[I915_MAX_PIPES];
a266c7d5
CW		 2859 unsigned long irqflags;
2860 int irq_received;
2861 int ret = IRQ_NONE, pipe;
21ad8330
VS		 2862 u32 flip_mask =
2863 I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
2864 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT;
a266c7d5
CW		 2865
2866 atomic_inc(&dev_priv->irq_received);
2867
2868 iir = I915_READ(IIR);
2869
a266c7d5 2870 for (;;) {
2c8ba29f
CW		 2871 bool blc_event = false;
2872
21ad8330 2873 irq_received = (iir & ~flip_mask) != 0;
a266c7d5
CW		 2874
2875 /* Can't rely on pipestat interrupt bit in iir as it might
2876 * have been cleared after the pipestat interrupt was received.
2877 * It doesn't set the bit in iir again, but it still produces
2878 * interrupts (for non-MSI).
2879 */
2880 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
2881 if (iir & I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT)
2882 i915_handle_error(dev, false);
2883
2884 for_each_pipe(pipe) {
2885 int reg = PIPESTAT(pipe);
2886 pipe_stats[pipe] = I915_READ(reg);
2887
2888 /*
2889 * Clear the PIPE*STAT regs before the IIR
2890 */
2891 if (pipe_stats[pipe] & 0x8000ffff) {
2892 if (pipe_stats[pipe] & PIPE_FIFO_UNDERRUN_STATUS)
2893 DRM_DEBUG_DRIVER("pipe %c underrun\n",
2894 pipe_name(pipe));
2895 I915_WRITE(reg, pipe_stats[pipe]);
2896 irq_received = 1;
2897 }
2898 }
2899 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
2900
2901 if (!irq_received)
2902 break;
2903
2904 ret = IRQ_HANDLED;
2905
2906 /* Consume port. Then clear IIR or we'll miss events */
adca4730 2907 if (iir & I915_DISPLAY_PORT_INTERRUPT) {
a266c7d5 2908 u32 hotplug_status = I915_READ(PORT_HOTPLUG_STAT);
b543fb04
EE		 2909 u32 hotplug_trigger = hotplug_status & (IS_G4X(dev) ?
2910 HOTPLUG_INT_STATUS_G4X :
4f7fd709 2911 HOTPLUG_INT_STATUS_I915);
a266c7d5
CW		 2912
2913 DRM_DEBUG_DRIVER("hotplug event received, stat 0x%08x\n",
2914 hotplug_status);
91d131d2
DV		 2915
2916 intel_hpd_irq_handler(dev, hotplug_trigger,
2917 IS_G4X(dev) ? hpd_status_gen4 : hpd_status_i915);
2918
a266c7d5
CW		 2919 I915_WRITE(PORT_HOTPLUG_STAT, hotplug_status);
2920 I915_READ(PORT_HOTPLUG_STAT);
2921 }
2922
21ad8330 2923 I915_WRITE(IIR, iir & ~flip_mask);
a266c7d5
CW		 2924 new_iir = I915_READ(IIR); /* Flush posted writes */
2925
a266c7d5
CW		 2926 if (iir & I915_USER_INTERRUPT)
2927 notify_ring(dev, &dev_priv->ring[RCS]);
2928 if (iir & I915_BSD_USER_INTERRUPT)
2929 notify_ring(dev, &dev_priv->ring[VCS]);
2930
a266c7d5 2931 for_each_pipe(pipe) {
2c8ba29f 2932 if (pipe_stats[pipe] & PIPE_START_VBLANK_INTERRUPT_STATUS &&
90a72f87
VS		 2933 i915_handle_vblank(dev, pipe, pipe, iir))
2934 flip_mask &= ~DISPLAY_PLANE_FLIP_PENDING(pipe);
a266c7d5
CW		 2935
2936 if (pipe_stats[pipe] & PIPE_LEGACY_BLC_EVENT_STATUS)
2937 blc_event = true;
2938 }
2939
2940
2941 if (blc_event || (iir & I915_ASLE_INTERRUPT))
2942 intel_opregion_asle_intr(dev);
2943
515ac2bb
DV		 2944 if (pipe_stats[0] & PIPE_GMBUS_INTERRUPT_STATUS)
2945 gmbus_irq_handler(dev);
2946
a266c7d5
CW		 2947 /* With MSI, interrupts are only generated when iir
2948 * transitions from zero to nonzero. If another bit got
2949 * set while we were handling the existing iir bits, then
2950 * we would never get another interrupt.
2951 *
2952 * This is fine on non-MSI as well, as if we hit this path
2953 * we avoid exiting the interrupt handler only to generate
2954 * another one.
2955 *
2956 * Note that for MSI this could cause a stray interrupt report
2957 * if an interrupt landed in the time between writing IIR and
2958 * the posting read. This should be rare enough to never
2959 * trigger the 99% of 100,000 interrupts test for disabling
2960 * stray interrupts.
2961 */
2962 iir = new_iir;
2963 }
2964
d05c617e 2965 i915_update_dri1_breadcrumb(dev);
2c8ba29f 2966
a266c7d5
CW		 2967 return ret;
2968}
2969
2970static void i965_irq_uninstall(struct drm_device * dev)
2971{
2972 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2973 int pipe;
2974
2975 if (!dev_priv)
2976 return;
2977
ac4c16c5
EE		 2978 del_timer_sync(&dev_priv->hotplug_reenable_timer);
2979
adca4730
CW		 2980 I915_WRITE(PORT_HOTPLUG_EN, 0);
2981 I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
a266c7d5
CW		 2982
2983 I915_WRITE(HWSTAM, 0xffffffff);
2984 for_each_pipe(pipe)
2985 I915_WRITE(PIPESTAT(pipe), 0);
2986 I915_WRITE(IMR, 0xffffffff);
2987 I915_WRITE(IER, 0x0);
2988
2989 for_each_pipe(pipe)
2990 I915_WRITE(PIPESTAT(pipe),
2991 I915_READ(PIPESTAT(pipe)) & 0x8000ffff);
2992 I915_WRITE(IIR, I915_READ(IIR));
2993}
2994
ac4c16c5
EE		 2995static void i915_reenable_hotplug_timer_func(unsigned long data)
2996{
2997 drm_i915_private_t *dev_priv = (drm_i915_private_t *)data;
2998 struct drm_device *dev = dev_priv->dev;
2999 struct drm_mode_config *mode_config = &dev->mode_config;
3000 unsigned long irqflags;
3001 int i;
3002
3003 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
3004 for (i = (HPD_NONE + 1); i < HPD_NUM_PINS; i++) {
3005 struct drm_connector *connector;
3006
3007 if (dev_priv->hpd_stats[i].hpd_mark != HPD_DISABLED)
3008 continue;
3009
3010 dev_priv->hpd_stats[i].hpd_mark = HPD_ENABLED;
3011
3012 list_for_each_entry(connector, &mode_config->connector_list, head) {
3013 struct intel_connector *intel_connector = to_intel_connector(connector);
3014
3015 if (intel_connector->encoder->hpd_pin == i) {
3016 if (connector->polled != intel_connector->polled)
3017 DRM_DEBUG_DRIVER("Reenabling HPD on connector %s\n",
3018 drm_get_connector_name(connector));
3019 connector->polled = intel_connector->polled;
3020 if (!connector->polled)
3021 connector->polled = DRM_CONNECTOR_POLL_HPD;
3022 }
3023 }
3024 }
3025 if (dev_priv->display.hpd_irq_setup)
3026 dev_priv->display.hpd_irq_setup(dev);
3027 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
3028}
3029
f71d4af4
JB		 3030void intel_irq_init(struct drm_device *dev)
3031{
8b2e326d
CW		 3032 struct drm_i915_private *dev_priv = dev->dev_private;
3033
3034 INIT_WORK(&dev_priv->hotplug_work, i915_hotplug_work_func);
99584db3 3035 INIT_WORK(&dev_priv->gpu_error.work, i915_error_work_func);
c6a828d3 3036 INIT_WORK(&dev_priv->rps.work, gen6_pm_rps_work);
a4da4fa4 3037 INIT_WORK(&dev_priv->l3_parity.error_work, ivybridge_parity_work);
8b2e326d 3038
99584db3
DV		 3039 setup_timer(&dev_priv->gpu_error.hangcheck_timer,
3040 i915_hangcheck_elapsed,
61bac78e 3041 (unsigned long) dev);
ac4c16c5
EE		 3042 setup_timer(&dev_priv->hotplug_reenable_timer, i915_reenable_hotplug_timer_func,
3043 (unsigned long) dev_priv);
61bac78e 3044
97a19a24 3045 pm_qos_add_request(&dev_priv->pm_qos, PM_QOS_CPU_DMA_LATENCY, PM_QOS_DEFAULT_VALUE);
9ee32fea 3046
f71d4af4
JB		 3047 dev->driver->get_vblank_counter = i915_get_vblank_counter;
3048 dev->max_vblank_count = 0xffffff; /* only 24 bits of frame count */
7d4e146f 3049 if (IS_G4X(dev) || INTEL_INFO(dev)->gen >= 5) {
f71d4af4
JB		 3050 dev->max_vblank_count = 0xffffffff; /* full 32 bit counter */
3051 dev->driver->get_vblank_counter = gm45_get_vblank_counter;
3052 }
3053
c3613de9
KP		 3054 if (drm_core_check_feature(dev, DRIVER_MODESET))
3055 dev->driver->get_vblank_timestamp = i915_get_vblank_timestamp;
3056 else
3057 dev->driver->get_vblank_timestamp = NULL;
f71d4af4
JB		 3058 dev->driver->get_scanout_position = i915_get_crtc_scanoutpos;
3059
7e231dbe
JB		 3060 if (IS_VALLEYVIEW(dev)) {
3061 dev->driver->irq_handler = valleyview_irq_handler;
3062 dev->driver->irq_preinstall = valleyview_irq_preinstall;
3063 dev->driver->irq_postinstall = valleyview_irq_postinstall;
3064 dev->driver->irq_uninstall = valleyview_irq_uninstall;
3065 dev->driver->enable_vblank = valleyview_enable_vblank;
3066 dev->driver->disable_vblank = valleyview_disable_vblank;
fa00abe0 3067 dev_priv->display.hpd_irq_setup = i915_hpd_irq_setup;
4a06e201 3068 } else if (IS_IVYBRIDGE(dev) || IS_HASWELL(dev)) {
7d99163d 3069 /* Share uninstall handlers with ILK/SNB */
f1af8fc1 3070 dev->driver->irq_handler = ironlake_irq_handler;
31694658 3071 dev->driver->irq_preinstall = ironlake_irq_preinstall;
f71d4af4
JB		 3072 dev->driver->irq_postinstall = ivybridge_irq_postinstall;
3073 dev->driver->irq_uninstall = ironlake_irq_uninstall;
3074 dev->driver->enable_vblank = ivybridge_enable_vblank;
3075 dev->driver->disable_vblank = ivybridge_disable_vblank;
82a28bcf 3076 dev_priv->display.hpd_irq_setup = ibx_hpd_irq_setup;
f71d4af4
JB		 3077 } else if (HAS_PCH_SPLIT(dev)) {
3078 dev->driver->irq_handler = ironlake_irq_handler;
3079 dev->driver->irq_preinstall = ironlake_irq_preinstall;
3080 dev->driver->irq_postinstall = ironlake_irq_postinstall;
3081 dev->driver->irq_uninstall = ironlake_irq_uninstall;
3082 dev->driver->enable_vblank = ironlake_enable_vblank;
3083 dev->driver->disable_vblank = ironlake_disable_vblank;
82a28bcf 3084 dev_priv->display.hpd_irq_setup = ibx_hpd_irq_setup;
f71d4af4 3085 } else {
c2798b19
CW		 3086 if (INTEL_INFO(dev)->gen == 2) {
3087 dev->driver->irq_preinstall = i8xx_irq_preinstall;
3088 dev->driver->irq_postinstall = i8xx_irq_postinstall;
3089 dev->driver->irq_handler = i8xx_irq_handler;
3090 dev->driver->irq_uninstall = i8xx_irq_uninstall;
a266c7d5
CW		 3091 } else if (INTEL_INFO(dev)->gen == 3) {
3092 dev->driver->irq_preinstall = i915_irq_preinstall;
3093 dev->driver->irq_postinstall = i915_irq_postinstall;
3094 dev->driver->irq_uninstall = i915_irq_uninstall;
3095 dev->driver->irq_handler = i915_irq_handler;
20afbda2 3096 dev_priv->display.hpd_irq_setup = i915_hpd_irq_setup;
c2798b19 3097 } else {
a266c7d5
CW		 3098 dev->driver->irq_preinstall = i965_irq_preinstall;
3099 dev->driver->irq_postinstall = i965_irq_postinstall;
3100 dev->driver->irq_uninstall = i965_irq_uninstall;
3101 dev->driver->irq_handler = i965_irq_handler;
bac56d5b 3102 dev_priv->display.hpd_irq_setup = i915_hpd_irq_setup;
c2798b19 3103 }
f71d4af4
JB		 3104 dev->driver->enable_vblank = i915_enable_vblank;
3105 dev->driver->disable_vblank = i915_disable_vblank;
3106 }
3107}
20afbda2
DV		 3108
3109void intel_hpd_init(struct drm_device *dev)
3110{
3111 struct drm_i915_private *dev_priv = dev->dev_private;
821450c6
EE		 3112 struct drm_mode_config *mode_config = &dev->mode_config;
3113 struct drm_connector *connector;
b5ea2d56 3114 unsigned long irqflags;
821450c6 3115 int i;
20afbda2 3116
821450c6
EE		 3117 for (i = 1; i < HPD_NUM_PINS; i++) {
3118 dev_priv->hpd_stats[i].hpd_cnt = 0;
3119 dev_priv->hpd_stats[i].hpd_mark = HPD_ENABLED;
3120 }
3121 list_for_each_entry(connector, &mode_config->connector_list, head) {
3122 struct intel_connector *intel_connector = to_intel_connector(connector);
3123 connector->polled = intel_connector->polled;
3124 if (!connector->polled && I915_HAS_HOTPLUG(dev) && intel_connector->encoder->hpd_pin > HPD_NONE)
3125 connector->polled = DRM_CONNECTOR_POLL_HPD;
3126 }
b5ea2d56
DV		 3127
3128 /* Interrupt setup is already guaranteed to be single-threaded, this is
3129 * just to make the assert_spin_locked checks happy. */
3130 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
20afbda2
DV		 3131 if (dev_priv->display.hpd_irq_setup)
3132 dev_priv->display.hpd_irq_setup(dev);
b5ea2d56 3133 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
20afbda2 3134}
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