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drm/i915: wake up all pageflip waiters
[deliverable/linux.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
036a4a7d 39/* For display hotplug interrupt */
995b6762 40static void
f2b115e6 41ironlake_enable_display_irq(drm_i915_private_t *dev_priv, u32 mask)
036a4a7d 42{
1ec14ad3
CW		 43 if ((dev_priv->irq_mask & mask) != 0) {
44 dev_priv->irq_mask &= ~mask;
45 I915_WRITE(DEIMR, dev_priv->irq_mask);
3143a2bf 46 POSTING_READ(DEIMR);
036a4a7d
ZW		 47 }
48}
49
50static inline void
f2b115e6 51ironlake_disable_display_irq(drm_i915_private_t *dev_priv, u32 mask)
036a4a7d 52{
1ec14ad3
CW		 53 if ((dev_priv->irq_mask & mask) != mask) {
54 dev_priv->irq_mask |= mask;
55 I915_WRITE(DEIMR, dev_priv->irq_mask);
3143a2bf 56 POSTING_READ(DEIMR);
036a4a7d
ZW		 57 }
58}
59
7c463586
KP		 60void
61i915_enable_pipestat(drm_i915_private_t *dev_priv, int pipe, u32 mask)
62{
63 if ((dev_priv->pipestat[pipe] & mask) != mask) {
9db4a9c7 64 u32 reg = PIPESTAT(pipe);
7c463586
KP		 65
66 dev_priv->pipestat[pipe] |= mask;
67 /* Enable the interrupt, clear any pending status */
68 I915_WRITE(reg, dev_priv->pipestat[pipe] | (mask >> 16));
3143a2bf 69 POSTING_READ(reg);
7c463586
KP		 70 }
71}
72
73void
74i915_disable_pipestat(drm_i915_private_t *dev_priv, int pipe, u32 mask)
75{
76 if ((dev_priv->pipestat[pipe] & mask) != 0) {
9db4a9c7 77 u32 reg = PIPESTAT(pipe);
7c463586
KP		 78
79 dev_priv->pipestat[pipe] &= ~mask;
80 I915_WRITE(reg, dev_priv->pipestat[pipe]);
3143a2bf 81 POSTING_READ(reg);
7c463586
KP		 82 }
83}
84
01c66889
ZY		 85/**
86 * intel_enable_asle - enable ASLE interrupt for OpRegion
87 */
1ec14ad3 88void intel_enable_asle(struct drm_device *dev)
01c66889 89{
1ec14ad3
CW		 90 drm_i915_private_t *dev_priv = dev->dev_private;
91 unsigned long irqflags;
92
7e231dbe
JB		 93 /* FIXME: opregion/asle for VLV */
94 if (IS_VALLEYVIEW(dev))
95 return;
96
1ec14ad3 97 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
01c66889 98
c619eed4 99 if (HAS_PCH_SPLIT(dev))
f2b115e6 100 ironlake_enable_display_irq(dev_priv, DE_GSE);
edcb49ca 101 else {
01c66889 102 i915_enable_pipestat(dev_priv, 1,
d874bcff 103 PIPE_LEGACY_BLC_EVENT_ENABLE);
a6c45cf0 104 if (INTEL_INFO(dev)->gen >= 4)
edcb49ca 105 i915_enable_pipestat(dev_priv, 0,
d874bcff 106 PIPE_LEGACY_BLC_EVENT_ENABLE);
edcb49ca 107 }
1ec14ad3
CW		 108
109 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
01c66889
ZY		 110}
111
0a3e67a4
JB		 112/**
113 * i915_pipe_enabled - check if a pipe is enabled
114 * @dev: DRM device
115 * @pipe: pipe to check
116 *
117 * Reading certain registers when the pipe is disabled can hang the chip.
118 * Use this routine to make sure the PLL is running and the pipe is active
119 * before reading such registers if unsure.
120 */
121static int
122i915_pipe_enabled(struct drm_device *dev, int pipe)
123{
124 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
702e7a56
PZ		 125 enum transcoder cpu_transcoder = intel_pipe_to_cpu_transcoder(dev_priv,
126 pipe);
127
128 return I915_READ(PIPECONF(cpu_transcoder)) & PIPECONF_ENABLE;
0a3e67a4
JB		 129}
130
42f52ef8
KP		 131/* Called from drm generic code, passed a 'crtc', which
132 * we use as a pipe index
133 */
f71d4af4 134static u32 i915_get_vblank_counter(struct drm_device *dev, int pipe)
0a3e67a4
JB		 135{
136 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
137 unsigned long high_frame;
138 unsigned long low_frame;
5eddb70b 139 u32 high1, high2, low;
0a3e67a4
JB		 140
141 if (!i915_pipe_enabled(dev, pipe)) {
44d98a61 142 DRM_DEBUG_DRIVER("trying to get vblank count for disabled "
9db4a9c7 143 "pipe %c\n", pipe_name(pipe));
0a3e67a4
JB		 144 return 0;
145 }
146
9db4a9c7
JB		 147 high_frame = PIPEFRAME(pipe);
148 low_frame = PIPEFRAMEPIXEL(pipe);
5eddb70b 149
0a3e67a4
JB		 150 /*
151 * High & low register fields aren't synchronized, so make sure
152 * we get a low value that's stable across two reads of the high
153 * register.
154 */
155 do {
5eddb70b
CW		 156 high1 = I915_READ(high_frame) & PIPE_FRAME_HIGH_MASK;
157 low = I915_READ(low_frame) & PIPE_FRAME_LOW_MASK;
158 high2 = I915_READ(high_frame) & PIPE_FRAME_HIGH_MASK;
0a3e67a4
JB		 159 } while (high1 != high2);
160
5eddb70b
CW		 161 high1 >>= PIPE_FRAME_HIGH_SHIFT;
162 low >>= PIPE_FRAME_LOW_SHIFT;
163 return (high1 << 8) | low;
0a3e67a4
JB		 164}
165
f71d4af4 166static u32 gm45_get_vblank_counter(struct drm_device *dev, int pipe)
9880b7a5
JB		 167{
168 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
9db4a9c7 169 int reg = PIPE_FRMCOUNT_GM45(pipe);
9880b7a5
JB		 170
171 if (!i915_pipe_enabled(dev, pipe)) {
44d98a61 172 DRM_DEBUG_DRIVER("trying to get vblank count for disabled "
9db4a9c7 173 "pipe %c\n", pipe_name(pipe));
9880b7a5
JB		 174 return 0;
175 }
176
177 return I915_READ(reg);
178}
179
f71d4af4 180static int i915_get_crtc_scanoutpos(struct drm_device *dev, int pipe,
0af7e4df
MK		 181 int *vpos, int *hpos)
182{
183 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
184 u32 vbl = 0, position = 0;
185 int vbl_start, vbl_end, htotal, vtotal;
186 bool in_vbl = true;
187 int ret = 0;
fe2b8f9d
PZ		 188 enum transcoder cpu_transcoder = intel_pipe_to_cpu_transcoder(dev_priv,
189 pipe);
0af7e4df
MK		 190
191 if (!i915_pipe_enabled(dev, pipe)) {
192 DRM_DEBUG_DRIVER("trying to get scanoutpos for disabled "
9db4a9c7 193 "pipe %c\n", pipe_name(pipe));
0af7e4df
MK		 194 return 0;
195 }
196
197 /* Get vtotal. */
fe2b8f9d 198 vtotal = 1 + ((I915_READ(VTOTAL(cpu_transcoder)) >> 16) & 0x1fff);
0af7e4df
MK		 199
200 if (INTEL_INFO(dev)->gen >= 4) {
201 /* No obvious pixelcount register. Only query vertical
202 * scanout position from Display scan line register.
203 */
204 position = I915_READ(PIPEDSL(pipe));
205
206 /* Decode into vertical scanout position. Don't have
207 * horizontal scanout position.
208 */
209 *vpos = position & 0x1fff;
210 *hpos = 0;
211 } else {
212 /* Have access to pixelcount since start of frame.
213 * We can split this into vertical and horizontal
214 * scanout position.
215 */
216 position = (I915_READ(PIPEFRAMEPIXEL(pipe)) & PIPE_PIXEL_MASK) >> PIPE_PIXEL_SHIFT;
217
fe2b8f9d 218 htotal = 1 + ((I915_READ(HTOTAL(cpu_transcoder)) >> 16) & 0x1fff);
0af7e4df
MK		 219 *vpos = position / htotal;
220 *hpos = position - (*vpos * htotal);
221 }
222
223 /* Query vblank area. */
fe2b8f9d 224 vbl = I915_READ(VBLANK(cpu_transcoder));
0af7e4df
MK		 225
226 /* Test position against vblank region. */
227 vbl_start = vbl & 0x1fff;
228 vbl_end = (vbl >> 16) & 0x1fff;
229
230 if ((*vpos < vbl_start) || (*vpos > vbl_end))
231 in_vbl = false;
232
233 /* Inside "upper part" of vblank area? Apply corrective offset: */
234 if (in_vbl && (*vpos >= vbl_start))
235 *vpos = *vpos - vtotal;
236
237 /* Readouts valid? */
238 if (vbl > 0)
239 ret |= DRM_SCANOUTPOS_VALID | DRM_SCANOUTPOS_ACCURATE;
240
241 /* In vblank? */
242 if (in_vbl)
243 ret |= DRM_SCANOUTPOS_INVBL;
244
245 return ret;
246}
247
f71d4af4 248static int i915_get_vblank_timestamp(struct drm_device *dev, int pipe,
0af7e4df
MK		 249 int *max_error,
250 struct timeval *vblank_time,
251 unsigned flags)
252{
4041b853
CW		 253 struct drm_i915_private *dev_priv = dev->dev_private;
254 struct drm_crtc *crtc;
0af7e4df 255
4041b853
CW		 256 if (pipe < 0 || pipe >= dev_priv->num_pipe) {
257 DRM_ERROR("Invalid crtc %d\n", pipe);
0af7e4df
MK		 258 return -EINVAL;
259 }
260
261 /* Get drm_crtc to timestamp: */
4041b853
CW		 262 crtc = intel_get_crtc_for_pipe(dev, pipe);
263 if (crtc == NULL) {
264 DRM_ERROR("Invalid crtc %d\n", pipe);
265 return -EINVAL;
266 }
267
268 if (!crtc->enabled) {
269 DRM_DEBUG_KMS("crtc %d is disabled\n", pipe);
270 return -EBUSY;
271 }
0af7e4df
MK		 272
273 /* Helper routine in DRM core does all the work: */
4041b853
CW		 274 return drm_calc_vbltimestamp_from_scanoutpos(dev, pipe, max_error,
275 vblank_time, flags,
276 crtc);
0af7e4df
MK		 277}
278
5ca58282
JB		 279/*
280 * Handle hotplug events outside the interrupt handler proper.
281 */
282static void i915_hotplug_work_func(struct work_struct *work)
283{
284 drm_i915_private_t *dev_priv = container_of(work, drm_i915_private_t,
285 hotplug_work);
286 struct drm_device *dev = dev_priv->dev;
c31c4ba3 287 struct drm_mode_config *mode_config = &dev->mode_config;
4ef69c7a
CW		 288 struct intel_encoder *encoder;
289
52d7eced
DV		 290 /* HPD irq before everything is fully set up. */
291 if (!dev_priv->enable_hotplug_processing)
292 return;
293
a65e34c7 294 mutex_lock(&mode_config->mutex);
e67189ab
JB		 295 DRM_DEBUG_KMS("running encoder hotplug functions\n");
296
4ef69c7a
CW		 297 list_for_each_entry(encoder, &mode_config->encoder_list, base.head)
298 if (encoder->hot_plug)
299 encoder->hot_plug(encoder);
300
40ee3381
KP		 301 mutex_unlock(&mode_config->mutex);
302
5ca58282 303 /* Just fire off a uevent and let userspace tell us what to do */
eb1f8e4f 304 drm_helper_hpd_irq_event(dev);
5ca58282
JB		 305}
306
73edd18f 307static void ironlake_handle_rps_change(struct drm_device *dev)
f97108d1
JB		 308{
309 drm_i915_private_t *dev_priv = dev->dev_private;
b5b72e89 310 u32 busy_up, busy_down, max_avg, min_avg;
9270388e
DV		 311 u8 new_delay;
312 unsigned long flags;
313
314 spin_lock_irqsave(&mchdev_lock, flags);
f97108d1 315
73edd18f
DV		 316 I915_WRITE16(MEMINTRSTS, I915_READ(MEMINTRSTS));
317
20e4d407 318 new_delay = dev_priv->ips.cur_delay;
9270388e 319
7648fa99 320 I915_WRITE16(MEMINTRSTS, MEMINT_EVAL_CHG);
b5b72e89
MG		 321 busy_up = I915_READ(RCPREVBSYTUPAVG);
322 busy_down = I915_READ(RCPREVBSYTDNAVG);
f97108d1
JB		 323 max_avg = I915_READ(RCBMAXAVG);
324 min_avg = I915_READ(RCBMINAVG);
325
326 /* Handle RCS change request from hw */
b5b72e89 327 if (busy_up > max_avg) {
20e4d407
DV		 328 if (dev_priv->ips.cur_delay != dev_priv->ips.max_delay)
329 new_delay = dev_priv->ips.cur_delay - 1;
330 if (new_delay < dev_priv->ips.max_delay)
331 new_delay = dev_priv->ips.max_delay;
b5b72e89 332 } else if (busy_down < min_avg) {
20e4d407
DV		 333 if (dev_priv->ips.cur_delay != dev_priv->ips.min_delay)
334 new_delay = dev_priv->ips.cur_delay + 1;
335 if (new_delay > dev_priv->ips.min_delay)
336 new_delay = dev_priv->ips.min_delay;
f97108d1
JB		 337 }
338
7648fa99 339 if (ironlake_set_drps(dev, new_delay))
20e4d407 340 dev_priv->ips.cur_delay = new_delay;
f97108d1 341
9270388e
DV		 342 spin_unlock_irqrestore(&mchdev_lock, flags);
343
f97108d1
JB		 344 return;
345}
346
549f7365
CW		 347static void notify_ring(struct drm_device *dev,
348 struct intel_ring_buffer *ring)
349{
350 struct drm_i915_private *dev_priv = dev->dev_private;
9862e600 351
475553de
CW		 352 if (ring->obj == NULL)
353 return;
354
b2eadbc8 355 trace_i915_gem_request_complete(ring, ring->get_seqno(ring, false));
9862e600 356
549f7365 357 wake_up_all(&ring->irq_queue);
3e0dc6b0
BW		 358 if (i915_enable_hangcheck) {
359 dev_priv->hangcheck_count = 0;
360 mod_timer(&dev_priv->hangcheck_timer,
cecc21fe 361 round_jiffies_up(jiffies + DRM_I915_HANGCHECK_JIFFIES));
3e0dc6b0 362 }
549f7365
CW		 363}
364
4912d041 365static void gen6_pm_rps_work(struct work_struct *work)
3b8d8d91 366{
4912d041 367 drm_i915_private_t *dev_priv = container_of(work, drm_i915_private_t,
c6a828d3 368 rps.work);
4912d041 369 u32 pm_iir, pm_imr;
7b9e0ae6 370 u8 new_delay;
4912d041 371
c6a828d3
DV		 372 spin_lock_irq(&dev_priv->rps.lock);
373 pm_iir = dev_priv->rps.pm_iir;
374 dev_priv->rps.pm_iir = 0;
4912d041 375 pm_imr = I915_READ(GEN6_PMIMR);
a9e2641d 376 I915_WRITE(GEN6_PMIMR, 0);
c6a828d3 377 spin_unlock_irq(&dev_priv->rps.lock);
3b8d8d91 378
7b9e0ae6 379 if ((pm_iir & GEN6_PM_DEFERRED_EVENTS) == 0)
3b8d8d91
JB		 380 return;
381
4fc688ce 382 mutex_lock(&dev_priv->rps.hw_lock);
7b9e0ae6
CW		 383
384 if (pm_iir & GEN6_PM_RP_UP_THRESHOLD)
c6a828d3 385 new_delay = dev_priv->rps.cur_delay + 1;
7b9e0ae6 386 else
c6a828d3 387 new_delay = dev_priv->rps.cur_delay - 1;
3b8d8d91 388
79249636
BW		 389 /* sysfs frequency interfaces may have snuck in while servicing the
390 * interrupt
391 */
392 if (!(new_delay > dev_priv->rps.max_delay ||
393 new_delay < dev_priv->rps.min_delay)) {
394 gen6_set_rps(dev_priv->dev, new_delay);
395 }
3b8d8d91 396
4fc688ce 397 mutex_unlock(&dev_priv->rps.hw_lock);
3b8d8d91
JB		 398}
399
e3689190
BW		 400
401/**
402 * ivybridge_parity_work - Workqueue called when a parity error interrupt
403 * occurred.
404 * @work: workqueue struct
405 *
406 * Doesn't actually do anything except notify userspace. As a consequence of
407 * this event, userspace should try to remap the bad rows since statistically
408 * it is likely the same row is more likely to go bad again.
409 */
410static void ivybridge_parity_work(struct work_struct *work)
411{
412 drm_i915_private_t *dev_priv = container_of(work, drm_i915_private_t,
a4da4fa4 413 l3_parity.error_work);
e3689190
BW		 414 u32 error_status, row, bank, subbank;
415 char *parity_event[5];
416 uint32_t misccpctl;
417 unsigned long flags;
418
419 /* We must turn off DOP level clock gating to access the L3 registers.
420 * In order to prevent a get/put style interface, acquire struct mutex
421 * any time we access those registers.
422 */
423 mutex_lock(&dev_priv->dev->struct_mutex);
424
425 misccpctl = I915_READ(GEN7_MISCCPCTL);
426 I915_WRITE(GEN7_MISCCPCTL, misccpctl & ~GEN7_DOP_CLOCK_GATE_ENABLE);
427 POSTING_READ(GEN7_MISCCPCTL);
428
429 error_status = I915_READ(GEN7_L3CDERRST1);
430 row = GEN7_PARITY_ERROR_ROW(error_status);
431 bank = GEN7_PARITY_ERROR_BANK(error_status);
432 subbank = GEN7_PARITY_ERROR_SUBBANK(error_status);
433
434 I915_WRITE(GEN7_L3CDERRST1, GEN7_PARITY_ERROR_VALID |
435 GEN7_L3CDERRST1_ENABLE);
436 POSTING_READ(GEN7_L3CDERRST1);
437
438 I915_WRITE(GEN7_MISCCPCTL, misccpctl);
439
440 spin_lock_irqsave(&dev_priv->irq_lock, flags);
441 dev_priv->gt_irq_mask &= ~GT_GEN7_L3_PARITY_ERROR_INTERRUPT;
442 I915_WRITE(GTIMR, dev_priv->gt_irq_mask);
443 spin_unlock_irqrestore(&dev_priv->irq_lock, flags);
444
445 mutex_unlock(&dev_priv->dev->struct_mutex);
446
447 parity_event[0] = "L3_PARITY_ERROR=1";
448 parity_event[1] = kasprintf(GFP_KERNEL, "ROW=%d", row);
449 parity_event[2] = kasprintf(GFP_KERNEL, "BANK=%d", bank);
450 parity_event[3] = kasprintf(GFP_KERNEL, "SUBBANK=%d", subbank);
451 parity_event[4] = NULL;
452
453 kobject_uevent_env(&dev_priv->dev->primary->kdev.kobj,
454 KOBJ_CHANGE, parity_event);
455
456 DRM_DEBUG("Parity error: Row = %d, Bank = %d, Sub bank = %d.\n",
457 row, bank, subbank);
458
459 kfree(parity_event[3]);
460 kfree(parity_event[2]);
461 kfree(parity_event[1]);
462}
463
d2ba8470 464static void ivybridge_handle_parity_error(struct drm_device *dev)
e3689190
BW		 465{
466 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
467 unsigned long flags;
468
e1ef7cc2 469 if (!HAS_L3_GPU_CACHE(dev))
e3689190
BW		 470 return;
471
472 spin_lock_irqsave(&dev_priv->irq_lock, flags);
473 dev_priv->gt_irq_mask |= GT_GEN7_L3_PARITY_ERROR_INTERRUPT;
474 I915_WRITE(GTIMR, dev_priv->gt_irq_mask);
475 spin_unlock_irqrestore(&dev_priv->irq_lock, flags);
476
a4da4fa4 477 queue_work(dev_priv->wq, &dev_priv->l3_parity.error_work);
e3689190
BW		 478}
479
e7b4c6b1
DV		 480static void snb_gt_irq_handler(struct drm_device *dev,
481 struct drm_i915_private *dev_priv,
482 u32 gt_iir)
483{
484
485 if (gt_iir & (GEN6_RENDER_USER_INTERRUPT |
486 GEN6_RENDER_PIPE_CONTROL_NOTIFY_INTERRUPT))
487 notify_ring(dev, &dev_priv->ring[RCS]);
488 if (gt_iir & GEN6_BSD_USER_INTERRUPT)
489 notify_ring(dev, &dev_priv->ring[VCS]);
490 if (gt_iir & GEN6_BLITTER_USER_INTERRUPT)
491 notify_ring(dev, &dev_priv->ring[BCS]);
492
493 if (gt_iir & (GT_GEN6_BLT_CS_ERROR_INTERRUPT |
494 GT_GEN6_BSD_CS_ERROR_INTERRUPT |
495 GT_RENDER_CS_ERROR_INTERRUPT)) {
496 DRM_ERROR("GT error interrupt 0x%08x\n", gt_iir);
497 i915_handle_error(dev, false);
498 }
e3689190
BW		 499
500 if (gt_iir & GT_GEN7_L3_PARITY_ERROR_INTERRUPT)
501 ivybridge_handle_parity_error(dev);
e7b4c6b1
DV		 502}
503
fc6826d1
CW		 504static void gen6_queue_rps_work(struct drm_i915_private *dev_priv,
505 u32 pm_iir)
506{
507 unsigned long flags;
508
509 /*
510 * IIR bits should never already be set because IMR should
511 * prevent an interrupt from being shown in IIR. The warning
512 * displays a case where we've unsafely cleared
c6a828d3 513 * dev_priv->rps.pm_iir. Although missing an interrupt of the same
fc6826d1
CW		 514 * type is not a problem, it displays a problem in the logic.
515 *
c6a828d3 516 * The mask bit in IMR is cleared by dev_priv->rps.work.
fc6826d1
CW		 517 */
518
c6a828d3 519 spin_lock_irqsave(&dev_priv->rps.lock, flags);
c6a828d3
DV		 520 dev_priv->rps.pm_iir |= pm_iir;
521 I915_WRITE(GEN6_PMIMR, dev_priv->rps.pm_iir);
fc6826d1 522 POSTING_READ(GEN6_PMIMR);
c6a828d3 523 spin_unlock_irqrestore(&dev_priv->rps.lock, flags);
fc6826d1 524
c6a828d3 525 queue_work(dev_priv->wq, &dev_priv->rps.work);
fc6826d1
CW		 526}
527
515ac2bb
DV		 528static void gmbus_irq_handler(struct drm_device *dev)
529{
28c70f16
DV		 530 struct drm_i915_private *dev_priv = (drm_i915_private_t *) dev->dev_private;
531
28c70f16 532 wake_up_all(&dev_priv->gmbus_wait_queue);
515ac2bb
DV		 533}
534
ce99c256
DV		 535static void dp_aux_irq_handler(struct drm_device *dev)
536{
9ee32fea
DV		 537 struct drm_i915_private *dev_priv = (drm_i915_private_t *) dev->dev_private;
538
9ee32fea 539 wake_up_all(&dev_priv->gmbus_wait_queue);
ce99c256
DV		 540}
541
ff1f525e 542static irqreturn_t valleyview_irq_handler(int irq, void *arg)
7e231dbe
JB		 543{
544 struct drm_device *dev = (struct drm_device *) arg;
545 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
546 u32 iir, gt_iir, pm_iir;
547 irqreturn_t ret = IRQ_NONE;
548 unsigned long irqflags;
549 int pipe;
550 u32 pipe_stats[I915_MAX_PIPES];
7e231dbe
JB		 551
552 atomic_inc(&dev_priv->irq_received);
553
7e231dbe
JB		 554 while (true) {
555 iir = I915_READ(VLV_IIR);
556 gt_iir = I915_READ(GTIIR);
557 pm_iir = I915_READ(GEN6_PMIIR);
558
559 if (gt_iir == 0 && pm_iir == 0 && iir == 0)
560 goto out;
561
562 ret = IRQ_HANDLED;
563
e7b4c6b1 564 snb_gt_irq_handler(dev, dev_priv, gt_iir);
7e231dbe
JB		 565
566 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
567 for_each_pipe(pipe) {
568 int reg = PIPESTAT(pipe);
569 pipe_stats[pipe] = I915_READ(reg);
570
571 /*
572 * Clear the PIPE*STAT regs before the IIR
573 */
574 if (pipe_stats[pipe] & 0x8000ffff) {
575 if (pipe_stats[pipe] & PIPE_FIFO_UNDERRUN_STATUS)
576 DRM_DEBUG_DRIVER("pipe %c underrun\n",
577 pipe_name(pipe));
578 I915_WRITE(reg, pipe_stats[pipe]);
579 }
580 }
581 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
582
31acc7f5
JB		 583 for_each_pipe(pipe) {
584 if (pipe_stats[pipe] & PIPE_VBLANK_INTERRUPT_STATUS)
585 drm_handle_vblank(dev, pipe);
586
587 if (pipe_stats[pipe] & PLANE_FLIPDONE_INT_STATUS_VLV) {
588 intel_prepare_page_flip(dev, pipe);
589 intel_finish_page_flip(dev, pipe);
590 }
591 }
592
7e231dbe
JB		 593 /* Consume port. Then clear IIR or we'll miss events */
594 if (iir & I915_DISPLAY_PORT_INTERRUPT) {
595 u32 hotplug_status = I915_READ(PORT_HOTPLUG_STAT);
596
597 DRM_DEBUG_DRIVER("hotplug event received, stat 0x%08x\n",
598 hotplug_status);
599 if (hotplug_status & dev_priv->hotplug_supported_mask)
600 queue_work(dev_priv->wq,
601 &dev_priv->hotplug_work);
602
603 I915_WRITE(PORT_HOTPLUG_STAT, hotplug_status);
604 I915_READ(PORT_HOTPLUG_STAT);
605 }
606
515ac2bb
DV		 607 if (pipe_stats[0] & PIPE_GMBUS_INTERRUPT_STATUS)
608 gmbus_irq_handler(dev);
7e231dbe 609
fc6826d1
CW		 610 if (pm_iir & GEN6_PM_DEFERRED_EVENTS)
611 gen6_queue_rps_work(dev_priv, pm_iir);
7e231dbe
JB		 612
613 I915_WRITE(GTIIR, gt_iir);
614 I915_WRITE(GEN6_PMIIR, pm_iir);
615 I915_WRITE(VLV_IIR, iir);
616 }
617
618out:
619 return ret;
620}
621
23e81d69 622static void ibx_irq_handler(struct drm_device *dev, u32 pch_iir)
776ad806
JB		 623{
624 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
9db4a9c7 625 int pipe;
776ad806 626
76e43830
DV		 627 if (pch_iir & SDE_HOTPLUG_MASK)
628 queue_work(dev_priv->wq, &dev_priv->hotplug_work);
629
776ad806
JB		 630 if (pch_iir & SDE_AUDIO_POWER_MASK)
631 DRM_DEBUG_DRIVER("PCH audio power change on port %d\n",
632 (pch_iir & SDE_AUDIO_POWER_MASK) >>
633 SDE_AUDIO_POWER_SHIFT);
634
ce99c256
DV		 635 if (pch_iir & SDE_AUX_MASK)
636 dp_aux_irq_handler(dev);
637
776ad806 638 if (pch_iir & SDE_GMBUS)
515ac2bb 639 gmbus_irq_handler(dev);
776ad806
JB		 640
641 if (pch_iir & SDE_AUDIO_HDCP_MASK)
642 DRM_DEBUG_DRIVER("PCH HDCP audio interrupt\n");
643
644 if (pch_iir & SDE_AUDIO_TRANS_MASK)
645 DRM_DEBUG_DRIVER("PCH transcoder audio interrupt\n");
646
647 if (pch_iir & SDE_POISON)
648 DRM_ERROR("PCH poison interrupt\n");
649
9db4a9c7
JB		 650 if (pch_iir & SDE_FDI_MASK)
651 for_each_pipe(pipe)
652 DRM_DEBUG_DRIVER(" pipe %c FDI IIR: 0x%08x\n",
653 pipe_name(pipe),
654 I915_READ(FDI_RX_IIR(pipe)));
776ad806
JB		 655
656 if (pch_iir & (SDE_TRANSB_CRC_DONE | SDE_TRANSA_CRC_DONE))
657 DRM_DEBUG_DRIVER("PCH transcoder CRC done interrupt\n");
658
659 if (pch_iir & (SDE_TRANSB_CRC_ERR | SDE_TRANSA_CRC_ERR))
660 DRM_DEBUG_DRIVER("PCH transcoder CRC error interrupt\n");
661
662 if (pch_iir & SDE_TRANSB_FIFO_UNDER)
663 DRM_DEBUG_DRIVER("PCH transcoder B underrun interrupt\n");
664 if (pch_iir & SDE_TRANSA_FIFO_UNDER)
665 DRM_DEBUG_DRIVER("PCH transcoder A underrun interrupt\n");
666}
667
23e81d69
AJ		 668static void cpt_irq_handler(struct drm_device *dev, u32 pch_iir)
669{
670 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
671 int pipe;
672
76e43830
DV		 673 if (pch_iir & SDE_HOTPLUG_MASK_CPT)
674 queue_work(dev_priv->wq, &dev_priv->hotplug_work);
675
23e81d69
AJ		 676 if (pch_iir & SDE_AUDIO_POWER_MASK_CPT)
677 DRM_DEBUG_DRIVER("PCH audio power change on port %d\n",
678 (pch_iir & SDE_AUDIO_POWER_MASK_CPT) >>
679 SDE_AUDIO_POWER_SHIFT_CPT);
680
681 if (pch_iir & SDE_AUX_MASK_CPT)
ce99c256 682 dp_aux_irq_handler(dev);
23e81d69
AJ		 683
684 if (pch_iir & SDE_GMBUS_CPT)
515ac2bb 685 gmbus_irq_handler(dev);
23e81d69
AJ		 686
687 if (pch_iir & SDE_AUDIO_CP_REQ_CPT)
688 DRM_DEBUG_DRIVER("Audio CP request interrupt\n");
689
690 if (pch_iir & SDE_AUDIO_CP_CHG_CPT)
691 DRM_DEBUG_DRIVER("Audio CP change interrupt\n");
692
693 if (pch_iir & SDE_FDI_MASK_CPT)
694 for_each_pipe(pipe)
695 DRM_DEBUG_DRIVER(" pipe %c FDI IIR: 0x%08x\n",
696 pipe_name(pipe),
697 I915_READ(FDI_RX_IIR(pipe)));
698}
699
ff1f525e 700static irqreturn_t ivybridge_irq_handler(int irq, void *arg)
b1f14ad0
JB		 701{
702 struct drm_device *dev = (struct drm_device *) arg;
703 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
0e43406b
CW		 704 u32 de_iir, gt_iir, de_ier, pm_iir;
705 irqreturn_t ret = IRQ_NONE;
706 int i;
b1f14ad0
JB		 707
708 atomic_inc(&dev_priv->irq_received);
709
710 /* disable master interrupt before clearing iir */
711 de_ier = I915_READ(DEIER);
712 I915_WRITE(DEIER, de_ier & ~DE_MASTER_IRQ_CONTROL);
b1f14ad0 713
b1f14ad0 714 gt_iir = I915_READ(GTIIR);
0e43406b
CW		 715 if (gt_iir) {
716 snb_gt_irq_handler(dev, dev_priv, gt_iir);
717 I915_WRITE(GTIIR, gt_iir);
718 ret = IRQ_HANDLED;
b1f14ad0
JB		 719 }
720
0e43406b
CW		 721 de_iir = I915_READ(DEIIR);
722 if (de_iir) {
ce99c256
DV		 723 if (de_iir & DE_AUX_CHANNEL_A_IVB)
724 dp_aux_irq_handler(dev);
725
0e43406b
CW		 726 if (de_iir & DE_GSE_IVB)
727 intel_opregion_gse_intr(dev);
728
729 for (i = 0; i < 3; i++) {
74d44445
DV		 730 if (de_iir & (DE_PIPEA_VBLANK_IVB << (5 * i)))
731 drm_handle_vblank(dev, i);
0e43406b
CW		 732 if (de_iir & (DE_PLANEA_FLIP_DONE_IVB << (5 * i))) {
733 intel_prepare_page_flip(dev, i);
734 intel_finish_page_flip_plane(dev, i);
735 }
0e43406b 736 }
b615b57a 737
0e43406b
CW		 738 /* check event from PCH */
739 if (de_iir & DE_PCH_EVENT_IVB) {
740 u32 pch_iir = I915_READ(SDEIIR);
b1f14ad0 741
23e81d69 742 cpt_irq_handler(dev, pch_iir);
b1f14ad0 743
0e43406b
CW		 744 /* clear PCH hotplug event before clear CPU irq */
745 I915_WRITE(SDEIIR, pch_iir);
746 }
b615b57a 747
0e43406b
CW		 748 I915_WRITE(DEIIR, de_iir);
749 ret = IRQ_HANDLED;
b1f14ad0
JB		 750 }
751
0e43406b
CW		 752 pm_iir = I915_READ(GEN6_PMIIR);
753 if (pm_iir) {
754 if (pm_iir & GEN6_PM_DEFERRED_EVENTS)
755 gen6_queue_rps_work(dev_priv, pm_iir);
756 I915_WRITE(GEN6_PMIIR, pm_iir);
757 ret = IRQ_HANDLED;
758 }
b1f14ad0 759
b1f14ad0
JB		 760 I915_WRITE(DEIER, de_ier);
761 POSTING_READ(DEIER);
762
763 return ret;
764}
765
e7b4c6b1
DV		 766static void ilk_gt_irq_handler(struct drm_device *dev,
767 struct drm_i915_private *dev_priv,
768 u32 gt_iir)
769{
770 if (gt_iir & (GT_USER_INTERRUPT | GT_PIPE_NOTIFY))
771 notify_ring(dev, &dev_priv->ring[RCS]);
772 if (gt_iir & GT_BSD_USER_INTERRUPT)
773 notify_ring(dev, &dev_priv->ring[VCS]);
774}
775
ff1f525e 776static irqreturn_t ironlake_irq_handler(int irq, void *arg)
036a4a7d 777{
4697995b 778 struct drm_device *dev = (struct drm_device *) arg;
036a4a7d
ZW		 779 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
780 int ret = IRQ_NONE;
acd15b6c 781 u32 de_iir, gt_iir, de_ier, pm_iir;
881f47b6 782
4697995b
JB		 783 atomic_inc(&dev_priv->irq_received);
784
2d109a84
ZN		 785 /* disable master interrupt before clearing iir */
786 de_ier = I915_READ(DEIER);
787 I915_WRITE(DEIER, de_ier & ~DE_MASTER_IRQ_CONTROL);
3143a2bf 788 POSTING_READ(DEIER);
2d109a84 789
036a4a7d
ZW		 790 de_iir = I915_READ(DEIIR);
791 gt_iir = I915_READ(GTIIR);
3b8d8d91 792 pm_iir = I915_READ(GEN6_PMIIR);
036a4a7d 793
acd15b6c 794 if (de_iir == 0 && gt_iir == 0 && (!IS_GEN6(dev) || pm_iir == 0))
c7c85101 795 goto done;
036a4a7d 796
c7c85101 797 ret = IRQ_HANDLED;
036a4a7d 798
e7b4c6b1
DV		 799 if (IS_GEN5(dev))
800 ilk_gt_irq_handler(dev, dev_priv, gt_iir);
801 else
802 snb_gt_irq_handler(dev, dev_priv, gt_iir);
01c66889 803
ce99c256
DV		 804 if (de_iir & DE_AUX_CHANNEL_A)
805 dp_aux_irq_handler(dev);
806
c7c85101 807 if (de_iir & DE_GSE)
3b617967 808 intel_opregion_gse_intr(dev);
c650156a 809
74d44445
DV		 810 if (de_iir & DE_PIPEA_VBLANK)
811 drm_handle_vblank(dev, 0);
812
813 if (de_iir & DE_PIPEB_VBLANK)
814 drm_handle_vblank(dev, 1);
815
f072d2e7 816 if (de_iir & DE_PLANEA_FLIP_DONE) {
013d5aa2 817 intel_prepare_page_flip(dev, 0);
2bbda389 818 intel_finish_page_flip_plane(dev, 0);
f072d2e7 819 }
013d5aa2 820
f072d2e7 821 if (de_iir & DE_PLANEB_FLIP_DONE) {
013d5aa2 822 intel_prepare_page_flip(dev, 1);
2bbda389 823 intel_finish_page_flip_plane(dev, 1);
f072d2e7 824 }
013d5aa2 825
c7c85101 826 /* check event from PCH */
776ad806 827 if (de_iir & DE_PCH_EVENT) {
acd15b6c
DV		 828 u32 pch_iir = I915_READ(SDEIIR);
829
23e81d69
AJ		 830 if (HAS_PCH_CPT(dev))
831 cpt_irq_handler(dev, pch_iir);
832 else
833 ibx_irq_handler(dev, pch_iir);
acd15b6c
DV		 834
835 /* should clear PCH hotplug event before clear CPU irq */
836 I915_WRITE(SDEIIR, pch_iir);
776ad806 837 }
036a4a7d 838
73edd18f
DV		 839 if (IS_GEN5(dev) && de_iir & DE_PCU_EVENT)
840 ironlake_handle_rps_change(dev);
f97108d1 841
fc6826d1
CW		 842 if (IS_GEN6(dev) && pm_iir & GEN6_PM_DEFERRED_EVENTS)
843 gen6_queue_rps_work(dev_priv, pm_iir);
3b8d8d91 844
c7c85101
ZN		 845 I915_WRITE(GTIIR, gt_iir);
846 I915_WRITE(DEIIR, de_iir);
4912d041 847 I915_WRITE(GEN6_PMIIR, pm_iir);
c7c85101
ZN		 848
849done:
2d109a84 850 I915_WRITE(DEIER, de_ier);
3143a2bf 851 POSTING_READ(DEIER);
2d109a84 852
036a4a7d
ZW		 853 return ret;
854}
855
8a905236
JB		 856/**
857 * i915_error_work_func - do process context error handling work
858 * @work: work struct
859 *
860 * Fire an error uevent so userspace can see that a hang or error
861 * was detected.
862 */
863static void i915_error_work_func(struct work_struct *work)
864{
865 drm_i915_private_t *dev_priv = container_of(work, drm_i915_private_t,
866 error_work);
867 struct drm_device *dev = dev_priv->dev;
f316a42c
BG		 868 char *error_event[] = { "ERROR=1", NULL };
869 char *reset_event[] = { "RESET=1", NULL };
870 char *reset_done_event[] = { "ERROR=0", NULL };
8a905236 871
f316a42c
BG		 872 kobject_uevent_env(&dev->primary->kdev.kobj, KOBJ_CHANGE, error_event);
873
ba1234d1 874 if (atomic_read(&dev_priv->mm.wedged)) {
f803aa55
CW		 875 DRM_DEBUG_DRIVER("resetting chip\n");
876 kobject_uevent_env(&dev->primary->kdev.kobj, KOBJ_CHANGE, reset_event);
d4b8bb2a 877 if (!i915_reset(dev)) {
f803aa55
CW		 878 atomic_set(&dev_priv->mm.wedged, 0);
879 kobject_uevent_env(&dev->primary->kdev.kobj, KOBJ_CHANGE, reset_done_event);
f316a42c 880 }
30dbf0c0 881 complete_all(&dev_priv->error_completion);
f316a42c 882 }
8a905236
JB		 883}
884
85f9e50d
DV		 885/* NB: please notice the memset */
886static void i915_get_extra_instdone(struct drm_device *dev,
887 uint32_t *instdone)
888{
889 struct drm_i915_private *dev_priv = dev->dev_private;
890 memset(instdone, 0, sizeof(*instdone) * I915_NUM_INSTDONE_REG);
891
892 switch(INTEL_INFO(dev)->gen) {
893 case 2:
894 case 3:
895 instdone[0] = I915_READ(INSTDONE);
896 break;
897 case 4:
898 case 5:
899 case 6:
900 instdone[0] = I915_READ(INSTDONE_I965);
901 instdone[1] = I915_READ(INSTDONE1);
902 break;
903 default:
904 WARN_ONCE(1, "Unsupported platform\n");
905 case 7:
906 instdone[0] = I915_READ(GEN7_INSTDONE_1);
907 instdone[1] = I915_READ(GEN7_SC_INSTDONE);
908 instdone[2] = I915_READ(GEN7_SAMPLER_INSTDONE);
909 instdone[3] = I915_READ(GEN7_ROW_INSTDONE);
910 break;
911 }
912}
913
3bd3c932 914#ifdef CONFIG_DEBUG_FS
9df30794 915static struct drm_i915_error_object *
bcfb2e28 916i915_error_object_create(struct drm_i915_private *dev_priv,
05394f39 917 struct drm_i915_gem_object *src)
9df30794
CW		 918{
919 struct drm_i915_error_object *dst;
9da3da66 920 int i, count;
e56660dd 921 u32 reloc_offset;
9df30794 922
05394f39 923 if (src == NULL || src->pages == NULL)
9df30794
CW		 924 return NULL;
925
9da3da66 926 count = src->base.size / PAGE_SIZE;
9df30794 927
9da3da66 928 dst = kmalloc(sizeof(*dst) + count * sizeof(u32 *), GFP_ATOMIC);
9df30794
CW		 929 if (dst == NULL)
930 return NULL;
931
05394f39 932 reloc_offset = src->gtt_offset;
9da3da66 933 for (i = 0; i < count; i++) {
788885ae 934 unsigned long flags;
e56660dd 935 void *d;
788885ae 936
e56660dd 937 d = kmalloc(PAGE_SIZE, GFP_ATOMIC);
9df30794
CW		 938 if (d == NULL)
939 goto unwind;
e56660dd 940
788885ae 941 local_irq_save(flags);
74898d7e
DV		 942 if (reloc_offset < dev_priv->mm.gtt_mappable_end &&
943 src->has_global_gtt_mapping) {
172975aa
CW		 944 void __iomem *s;
945
946 /* Simply ignore tiling or any overlapping fence.
947 * It's part of the error state, and this hopefully
948 * captures what the GPU read.
949 */
950
951 s = io_mapping_map_atomic_wc(dev_priv->mm.gtt_mapping,
952 reloc_offset);
953 memcpy_fromio(d, s, PAGE_SIZE);
954 io_mapping_unmap_atomic(s);
960e3564
CW		 955 } else if (src->stolen) {
956 unsigned long offset;
957
958 offset = dev_priv->mm.stolen_base;
959 offset += src->stolen->start;
960 offset += i << PAGE_SHIFT;
961
1a240d4d 962 memcpy_fromio(d, (void __iomem *) offset, PAGE_SIZE);
172975aa 963 } else {
9da3da66 964 struct page *page;
172975aa
CW		 965 void *s;
966
9da3da66 967 page = i915_gem_object_get_page(src, i);
172975aa 968
9da3da66
CW		 969 drm_clflush_pages(&page, 1);
970
971 s = kmap_atomic(page);
172975aa
CW		 972 memcpy(d, s, PAGE_SIZE);
973 kunmap_atomic(s);
974
9da3da66 975 drm_clflush_pages(&page, 1);
172975aa 976 }
788885ae 977 local_irq_restore(flags);
e56660dd 978
9da3da66 979 dst->pages[i] = d;
e56660dd
CW		 980
981 reloc_offset += PAGE_SIZE;
9df30794 982 }
9da3da66 983 dst->page_count = count;
05394f39 984 dst->gtt_offset = src->gtt_offset;
9df30794
CW		 985
986 return dst;
987
988unwind:
9da3da66
CW		 989 while (i--)
990 kfree(dst->pages[i]);
9df30794
CW		 991 kfree(dst);
992 return NULL;
993}
994
995static void
996i915_error_object_free(struct drm_i915_error_object *obj)
997{
998 int page;
999
1000 if (obj == NULL)
1001 return;
1002
1003 for (page = 0; page < obj->page_count; page++)
1004 kfree(obj->pages[page]);
1005
1006 kfree(obj);
1007}
1008
742cbee8
DV		 1009void
1010i915_error_state_free(struct kref *error_ref)
9df30794 1011{
742cbee8
DV		 1012 struct drm_i915_error_state *error = container_of(error_ref,
1013 typeof(*error), ref);
e2f973d5
CW		 1014 int i;
1015
52d39a21
CW		 1016 for (i = 0; i < ARRAY_SIZE(error->ring); i++) {
1017 i915_error_object_free(error->ring[i].batchbuffer);
1018 i915_error_object_free(error->ring[i].ringbuffer);
1019 kfree(error->ring[i].requests);
1020 }
e2f973d5 1021
9df30794 1022 kfree(error->active_bo);
6ef3d427 1023 kfree(error->overlay);
9df30794
CW		 1024 kfree(error);
1025}
1b50247a
CW		 1026static void capture_bo(struct drm_i915_error_buffer *err,
1027 struct drm_i915_gem_object *obj)
1028{
1029 err->size = obj->base.size;
1030 err->name = obj->base.name;
0201f1ec
CW		 1031 err->rseqno = obj->last_read_seqno;
1032 err->wseqno = obj->last_write_seqno;
1b50247a
CW		 1033 err->gtt_offset = obj->gtt_offset;
1034 err->read_domains = obj->base.read_domains;
1035 err->write_domain = obj->base.write_domain;
1036 err->fence_reg = obj->fence_reg;
1037 err->pinned = 0;
1038 if (obj->pin_count > 0)
1039 err->pinned = 1;
1040 if (obj->user_pin_count > 0)
1041 err->pinned = -1;
1042 err->tiling = obj->tiling_mode;
1043 err->dirty = obj->dirty;
1044 err->purgeable = obj->madv != I915_MADV_WILLNEED;
1045 err->ring = obj->ring ? obj->ring->id : -1;
1046 err->cache_level = obj->cache_level;
1047}
9df30794 1048
1b50247a
CW		 1049static u32 capture_active_bo(struct drm_i915_error_buffer *err,
1050 int count, struct list_head *head)
c724e8a9
CW		 1051{
1052 struct drm_i915_gem_object *obj;
1053 int i = 0;
1054
1055 list_for_each_entry(obj, head, mm_list) {
1b50247a 1056 capture_bo(err++, obj);
c724e8a9
CW		 1057 if (++i == count)
1058 break;
1b50247a
CW		 1059 }
1060
1061 return i;
1062}
1063
1064static u32 capture_pinned_bo(struct drm_i915_error_buffer *err,
1065 int count, struct list_head *head)
1066{
1067 struct drm_i915_gem_object *obj;
1068 int i = 0;
1069
1070 list_for_each_entry(obj, head, gtt_list) {
1071 if (obj->pin_count == 0)
1072 continue;
c724e8a9 1073
1b50247a
CW		 1074 capture_bo(err++, obj);
1075 if (++i == count)
1076 break;
c724e8a9
CW		 1077 }
1078
1079 return i;
1080}
1081
748ebc60
CW		 1082static void i915_gem_record_fences(struct drm_device *dev,
1083 struct drm_i915_error_state *error)
1084{
1085 struct drm_i915_private *dev_priv = dev->dev_private;
1086 int i;
1087
1088 /* Fences */
1089 switch (INTEL_INFO(dev)->gen) {
775d17b6 1090 case 7:
748ebc60
CW		 1091 case 6:
1092 for (i = 0; i < 16; i++)
1093 error->fence[i] = I915_READ64(FENCE_REG_SANDYBRIDGE_0 + (i * 8));
1094 break;
1095 case 5:
1096 case 4:
1097 for (i = 0; i < 16; i++)
1098 error->fence[i] = I915_READ64(FENCE_REG_965_0 + (i * 8));
1099 break;
1100 case 3:
1101 if (IS_I945G(dev) || IS_I945GM(dev) || IS_G33(dev))
1102 for (i = 0; i < 8; i++)
1103 error->fence[i+8] = I915_READ(FENCE_REG_945_8 + (i * 4));
1104 case 2:
1105 for (i = 0; i < 8; i++)
1106 error->fence[i] = I915_READ(FENCE_REG_830_0 + (i * 4));
1107 break;
1108
7dbf9d6e
BW		 1109 default:
1110 BUG();
748ebc60
CW		 1111 }
1112}
1113
bcfb2e28
CW		 1114static struct drm_i915_error_object *
1115i915_error_first_batchbuffer(struct drm_i915_private *dev_priv,
1116 struct intel_ring_buffer *ring)
1117{
1118 struct drm_i915_gem_object *obj;
1119 u32 seqno;
1120
1121 if (!ring->get_seqno)
1122 return NULL;
1123
b45305fc
DV		 1124 if (HAS_BROKEN_CS_TLB(dev_priv->dev)) {
1125 u32 acthd = I915_READ(ACTHD);
1126
1127 if (WARN_ON(ring->id != RCS))
1128 return NULL;
1129
1130 obj = ring->private;
1131 if (acthd >= obj->gtt_offset &&
1132 acthd < obj->gtt_offset + obj->base.size)
1133 return i915_error_object_create(dev_priv, obj);
1134 }
1135
b2eadbc8 1136 seqno = ring->get_seqno(ring, false);
bcfb2e28
CW		 1137 list_for_each_entry(obj, &dev_priv->mm.active_list, mm_list) {
1138 if (obj->ring != ring)
1139 continue;
1140
0201f1ec 1141 if (i915_seqno_passed(seqno, obj->last_read_seqno))
bcfb2e28
CW		 1142 continue;
1143
1144 if ((obj->base.read_domains & I915_GEM_DOMAIN_COMMAND) == 0)
1145 continue;
1146
1147 /* We need to copy these to an anonymous buffer as the simplest
1148 * method to avoid being overwritten by userspace.
1149 */
1150 return i915_error_object_create(dev_priv, obj);
1151 }
1152
1153 return NULL;
1154}
1155
d27b1e0e
DV		 1156static void i915_record_ring_state(struct drm_device *dev,
1157 struct drm_i915_error_state *error,
1158 struct intel_ring_buffer *ring)
1159{
1160 struct drm_i915_private *dev_priv = dev->dev_private;
1161
33f3f518 1162 if (INTEL_INFO(dev)->gen >= 6) {
12f55818 1163 error->rc_psmi[ring->id] = I915_READ(ring->mmio_base + 0x50);
33f3f518 1164 error->fault_reg[ring->id] = I915_READ(RING_FAULT_REG(ring));
7e3b8737
DV		 1165 error->semaphore_mboxes[ring->id][0]
1166 = I915_READ(RING_SYNC_0(ring->mmio_base));
1167 error->semaphore_mboxes[ring->id][1]
1168 = I915_READ(RING_SYNC_1(ring->mmio_base));
df2b23d9
CW		 1169 error->semaphore_seqno[ring->id][0] = ring->sync_seqno[0];
1170 error->semaphore_seqno[ring->id][1] = ring->sync_seqno[1];
33f3f518 1171 }
c1cd90ed 1172
d27b1e0e 1173 if (INTEL_INFO(dev)->gen >= 4) {
9d2f41fa 1174 error->faddr[ring->id] = I915_READ(RING_DMA_FADD(ring->mmio_base));
d27b1e0e
DV		 1175 error->ipeir[ring->id] = I915_READ(RING_IPEIR(ring->mmio_base));
1176 error->ipehr[ring->id] = I915_READ(RING_IPEHR(ring->mmio_base));
1177 error->instdone[ring->id] = I915_READ(RING_INSTDONE(ring->mmio_base));
c1cd90ed 1178 error->instps[ring->id] = I915_READ(RING_INSTPS(ring->mmio_base));
050ee91f 1179 if (ring->id == RCS)
d27b1e0e 1180 error->bbaddr = I915_READ64(BB_ADDR);
d27b1e0e 1181 } else {
9d2f41fa 1182 error->faddr[ring->id] = I915_READ(DMA_FADD_I8XX);
d27b1e0e
DV		 1183 error->ipeir[ring->id] = I915_READ(IPEIR);
1184 error->ipehr[ring->id] = I915_READ(IPEHR);
1185 error->instdone[ring->id] = I915_READ(INSTDONE);
d27b1e0e
DV		 1186 }
1187
9574b3fe 1188 error->waiting[ring->id] = waitqueue_active(&ring->irq_queue);
c1cd90ed 1189 error->instpm[ring->id] = I915_READ(RING_INSTPM(ring->mmio_base));
b2eadbc8 1190 error->seqno[ring->id] = ring->get_seqno(ring, false);
d27b1e0e 1191 error->acthd[ring->id] = intel_ring_get_active_head(ring);
c1cd90ed
DV		 1192 error->head[ring->id] = I915_READ_HEAD(ring);
1193 error->tail[ring->id] = I915_READ_TAIL(ring);
7e3b8737
DV		 1194
1195 error->cpu_ring_head[ring->id] = ring->head;
1196 error->cpu_ring_tail[ring->id] = ring->tail;
d27b1e0e
DV		 1197}
1198
52d39a21
CW		 1199static void i915_gem_record_rings(struct drm_device *dev,
1200 struct drm_i915_error_state *error)
1201{
1202 struct drm_i915_private *dev_priv = dev->dev_private;
b4519513 1203 struct intel_ring_buffer *ring;
52d39a21
CW		 1204 struct drm_i915_gem_request *request;
1205 int i, count;
1206
b4519513 1207 for_each_ring(ring, dev_priv, i) {
52d39a21
CW		 1208 i915_record_ring_state(dev, error, ring);
1209
1210 error->ring[i].batchbuffer =
1211 i915_error_first_batchbuffer(dev_priv, ring);
1212
1213 error->ring[i].ringbuffer =
1214 i915_error_object_create(dev_priv, ring->obj);
1215
1216 count = 0;
1217 list_for_each_entry(request, &ring->request_list, list)
1218 count++;
1219
1220 error->ring[i].num_requests = count;
1221 error->ring[i].requests =
1222 kmalloc(count*sizeof(struct drm_i915_error_request),
1223 GFP_ATOMIC);
1224 if (error->ring[i].requests == NULL) {
1225 error->ring[i].num_requests = 0;
1226 continue;
1227 }
1228
1229 count = 0;
1230 list_for_each_entry(request, &ring->request_list, list) {
1231 struct drm_i915_error_request *erq;
1232
1233 erq = &error->ring[i].requests[count++];
1234 erq->seqno = request->seqno;
1235 erq->jiffies = request->emitted_jiffies;
ee4f42b1 1236 erq->tail = request->tail;
52d39a21
CW		 1237 }
1238 }
1239}
1240
8a905236
JB		 1241/**
1242 * i915_capture_error_state - capture an error record for later analysis
1243 * @dev: drm device
1244 *
1245 * Should be called when an error is detected (either a hang or an error
1246 * interrupt) to capture error state from the time of the error. Fills
1247 * out a structure which becomes available in debugfs for user level tools
1248 * to pick up.
1249 */
63eeaf38
JB		 1250static void i915_capture_error_state(struct drm_device *dev)
1251{
1252 struct drm_i915_private *dev_priv = dev->dev_private;
05394f39 1253 struct drm_i915_gem_object *obj;
63eeaf38
JB		 1254 struct drm_i915_error_state *error;
1255 unsigned long flags;
9db4a9c7 1256 int i, pipe;
63eeaf38
JB		 1257
1258 spin_lock_irqsave(&dev_priv->error_lock, flags);
9df30794
CW		 1259 error = dev_priv->first_error;
1260 spin_unlock_irqrestore(&dev_priv->error_lock, flags);
1261 if (error)
1262 return;
63eeaf38 1263
9db4a9c7 1264 /* Account for pipe specific data like PIPE*STAT */
33f3f518 1265 error = kzalloc(sizeof(*error), GFP_ATOMIC);
63eeaf38 1266 if (!error) {
9df30794
CW		 1267 DRM_DEBUG_DRIVER("out of memory, not capturing error state\n");
1268 return;
63eeaf38
JB		 1269 }
1270
b6f7833b
CW		 1271 DRM_INFO("capturing error event; look for more information in /debug/dri/%d/i915_error_state\n",
1272 dev->primary->index);
2fa772f3 1273
742cbee8 1274 kref_init(&error->ref);
63eeaf38
JB		 1275 error->eir = I915_READ(EIR);
1276 error->pgtbl_er = I915_READ(PGTBL_ER);
b9a3906b 1277 error->ccid = I915_READ(CCID);
be998e2e
BW		 1278
1279 if (HAS_PCH_SPLIT(dev))
1280 error->ier = I915_READ(DEIER) | I915_READ(GTIER);
1281 else if (IS_VALLEYVIEW(dev))
1282 error->ier = I915_READ(GTIER) | I915_READ(VLV_IER);
1283 else if (IS_GEN2(dev))
1284 error->ier = I915_READ16(IER);
1285 else
1286 error->ier = I915_READ(IER);
1287
9db4a9c7
JB		 1288 for_each_pipe(pipe)
1289 error->pipestat[pipe] = I915_READ(PIPESTAT(pipe));
d27b1e0e 1290
33f3f518 1291 if (INTEL_INFO(dev)->gen >= 6) {
f406839f 1292 error->error = I915_READ(ERROR_GEN6);
33f3f518
DV		 1293 error->done_reg = I915_READ(DONE_REG);
1294 }
d27b1e0e 1295
71e172e8
BW		 1296 if (INTEL_INFO(dev)->gen == 7)
1297 error->err_int = I915_READ(GEN7_ERR_INT);
1298
050ee91f
BW		 1299 i915_get_extra_instdone(dev, error->extra_instdone);
1300
748ebc60 1301 i915_gem_record_fences(dev, error);
52d39a21 1302 i915_gem_record_rings(dev, error);
9df30794 1303
c724e8a9 1304 /* Record buffers on the active and pinned lists. */
9df30794 1305 error->active_bo = NULL;
c724e8a9 1306 error->pinned_bo = NULL;
9df30794 1307
bcfb2e28
CW		 1308 i = 0;
1309 list_for_each_entry(obj, &dev_priv->mm.active_list, mm_list)
1310 i++;
1311 error->active_bo_count = i;
6c085a72 1312 list_for_each_entry(obj, &dev_priv->mm.bound_list, gtt_list)
1b50247a
CW		 1313 if (obj->pin_count)
1314 i++;
bcfb2e28 1315 error->pinned_bo_count = i - error->active_bo_count;
c724e8a9 1316
8e934dbf
CW		 1317 error->active_bo = NULL;
1318 error->pinned_bo = NULL;
bcfb2e28
CW		 1319 if (i) {
1320 error->active_bo = kmalloc(sizeof(*error->active_bo)*i,
9df30794 1321 GFP_ATOMIC);
c724e8a9
CW		 1322 if (error->active_bo)
1323 error->pinned_bo =
1324 error->active_bo + error->active_bo_count;
9df30794
CW		 1325 }
1326
c724e8a9
CW		 1327 if (error->active_bo)
1328 error->active_bo_count =
1b50247a
CW		 1329 capture_active_bo(error->active_bo,
1330 error->active_bo_count,
1331 &dev_priv->mm.active_list);
c724e8a9
CW		 1332
1333 if (error->pinned_bo)
1334 error->pinned_bo_count =
1b50247a
CW		 1335 capture_pinned_bo(error->pinned_bo,
1336 error->pinned_bo_count,
6c085a72 1337 &dev_priv->mm.bound_list);
c724e8a9 1338
9df30794
CW		 1339 do_gettimeofday(&error->time);
1340
6ef3d427 1341 error->overlay = intel_overlay_capture_error_state(dev);
c4a1d9e4 1342 error->display = intel_display_capture_error_state(dev);
6ef3d427 1343
9df30794
CW		 1344 spin_lock_irqsave(&dev_priv->error_lock, flags);
1345 if (dev_priv->first_error == NULL) {
1346 dev_priv->first_error = error;
1347 error = NULL;
1348 }
63eeaf38 1349 spin_unlock_irqrestore(&dev_priv->error_lock, flags);
9df30794
CW		 1350
1351 if (error)
742cbee8 1352 i915_error_state_free(&error->ref);
9df30794
CW		 1353}
1354
1355void i915_destroy_error_state(struct drm_device *dev)
1356{
1357 struct drm_i915_private *dev_priv = dev->dev_private;
1358 struct drm_i915_error_state *error;
6dc0e816 1359 unsigned long flags;
9df30794 1360
6dc0e816 1361 spin_lock_irqsave(&dev_priv->error_lock, flags);
9df30794
CW		 1362 error = dev_priv->first_error;
1363 dev_priv->first_error = NULL;
6dc0e816 1364 spin_unlock_irqrestore(&dev_priv->error_lock, flags);
9df30794
CW		 1365
1366 if (error)
742cbee8 1367 kref_put(&error->ref, i915_error_state_free);
63eeaf38 1368}
3bd3c932
CW		 1369#else
1370#define i915_capture_error_state(x)
1371#endif
63eeaf38 1372
35aed2e6 1373static void i915_report_and_clear_eir(struct drm_device *dev)
8a905236
JB		 1374{
1375 struct drm_i915_private *dev_priv = dev->dev_private;
bd9854f9 1376 uint32_t instdone[I915_NUM_INSTDONE_REG];
8a905236 1377 u32 eir = I915_READ(EIR);
050ee91f 1378 int pipe, i;
8a905236 1379
35aed2e6
CW		 1380 if (!eir)
1381 return;
8a905236 1382
a70491cc 1383 pr_err("render error detected, EIR: 0x%08x\n", eir);
8a905236 1384
bd9854f9
BW		 1385 i915_get_extra_instdone(dev, instdone);
1386
8a905236
JB		 1387 if (IS_G4X(dev)) {
1388 if (eir & (GM45_ERROR_MEM_PRIV | GM45_ERROR_CP_PRIV)) {
1389 u32 ipeir = I915_READ(IPEIR_I965);
1390
a70491cc
JP		 1391 pr_err(" IPEIR: 0x%08x\n", I915_READ(IPEIR_I965));
1392 pr_err(" IPEHR: 0x%08x\n", I915_READ(IPEHR_I965));
050ee91f
BW		 1393 for (i = 0; i < ARRAY_SIZE(instdone); i++)
1394 pr_err(" INSTDONE_%d: 0x%08x\n", i, instdone[i]);
a70491cc 1395 pr_err(" INSTPS: 0x%08x\n", I915_READ(INSTPS));
a70491cc 1396 pr_err(" ACTHD: 0x%08x\n", I915_READ(ACTHD_I965));
8a905236 1397 I915_WRITE(IPEIR_I965, ipeir);
3143a2bf 1398 POSTING_READ(IPEIR_I965);
8a905236
JB		 1399 }
1400 if (eir & GM45_ERROR_PAGE_TABLE) {
1401 u32 pgtbl_err = I915_READ(PGTBL_ER);
a70491cc
JP		 1402 pr_err("page table error\n");
1403 pr_err(" PGTBL_ER: 0x%08x\n", pgtbl_err);
8a905236 1404 I915_WRITE(PGTBL_ER, pgtbl_err);
3143a2bf 1405 POSTING_READ(PGTBL_ER);
8a905236
JB		 1406 }
1407 }
1408
a6c45cf0 1409 if (!IS_GEN2(dev)) {
8a905236
JB		 1410 if (eir & I915_ERROR_PAGE_TABLE) {
1411 u32 pgtbl_err = I915_READ(PGTBL_ER);
a70491cc
JP		 1412 pr_err("page table error\n");
1413 pr_err(" PGTBL_ER: 0x%08x\n", pgtbl_err);
8a905236 1414 I915_WRITE(PGTBL_ER, pgtbl_err);
3143a2bf 1415 POSTING_READ(PGTBL_ER);
8a905236
JB		 1416 }
1417 }
1418
1419 if (eir & I915_ERROR_MEMORY_REFRESH) {
a70491cc 1420 pr_err("memory refresh error:\n");
9db4a9c7 1421 for_each_pipe(pipe)
a70491cc 1422 pr_err("pipe %c stat: 0x%08x\n",
9db4a9c7 1423 pipe_name(pipe), I915_READ(PIPESTAT(pipe)));
8a905236
JB		 1424 /* pipestat has already been acked */
1425 }
1426 if (eir & I915_ERROR_INSTRUCTION) {
a70491cc
JP		 1427 pr_err("instruction error\n");
1428 pr_err(" INSTPM: 0x%08x\n", I915_READ(INSTPM));
050ee91f
BW		 1429 for (i = 0; i < ARRAY_SIZE(instdone); i++)
1430 pr_err(" INSTDONE_%d: 0x%08x\n", i, instdone[i]);
a6c45cf0 1431 if (INTEL_INFO(dev)->gen < 4) {
8a905236
JB		 1432 u32 ipeir = I915_READ(IPEIR);
1433
a70491cc
JP		 1434 pr_err(" IPEIR: 0x%08x\n", I915_READ(IPEIR));
1435 pr_err(" IPEHR: 0x%08x\n", I915_READ(IPEHR));
a70491cc 1436 pr_err(" ACTHD: 0x%08x\n", I915_READ(ACTHD));
8a905236 1437 I915_WRITE(IPEIR, ipeir);
3143a2bf 1438 POSTING_READ(IPEIR);
8a905236
JB		 1439 } else {
1440 u32 ipeir = I915_READ(IPEIR_I965);
1441
a70491cc
JP		 1442 pr_err(" IPEIR: 0x%08x\n", I915_READ(IPEIR_I965));
1443 pr_err(" IPEHR: 0x%08x\n", I915_READ(IPEHR_I965));
a70491cc 1444 pr_err(" INSTPS: 0x%08x\n", I915_READ(INSTPS));
a70491cc 1445 pr_err(" ACTHD: 0x%08x\n", I915_READ(ACTHD_I965));
8a905236 1446 I915_WRITE(IPEIR_I965, ipeir);
3143a2bf 1447 POSTING_READ(IPEIR_I965);
8a905236
JB		 1448 }
1449 }
1450
1451 I915_WRITE(EIR, eir);
3143a2bf 1452 POSTING_READ(EIR);
8a905236
JB		 1453 eir = I915_READ(EIR);
1454 if (eir) {
1455 /*
1456 * some errors might have become stuck,
1457 * mask them.
1458 */
1459 DRM_ERROR("EIR stuck: 0x%08x, masking\n", eir);
1460 I915_WRITE(EMR, I915_READ(EMR) | eir);
1461 I915_WRITE(IIR, I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT);
1462 }
35aed2e6
CW		 1463}
1464
1465/**
1466 * i915_handle_error - handle an error interrupt
1467 * @dev: drm device
1468 *
1469 * Do some basic checking of regsiter state at error interrupt time and
1470 * dump it to the syslog. Also call i915_capture_error_state() to make
1471 * sure we get a record and make it available in debugfs. Fire a uevent
1472 * so userspace knows something bad happened (should trigger collection
1473 * of a ring dump etc.).
1474 */
527f9e90 1475void i915_handle_error(struct drm_device *dev, bool wedged)
35aed2e6
CW		 1476{
1477 struct drm_i915_private *dev_priv = dev->dev_private;
b4519513
CW		 1478 struct intel_ring_buffer *ring;
1479 int i;
35aed2e6
CW		 1480
1481 i915_capture_error_state(dev);
1482 i915_report_and_clear_eir(dev);
8a905236 1483
ba1234d1 1484 if (wedged) {
30dbf0c0 1485 INIT_COMPLETION(dev_priv->error_completion);
ba1234d1
BG		 1486 atomic_set(&dev_priv->mm.wedged, 1);
1487
11ed50ec
BG		 1488 /*
1489 * Wakeup waiting processes so they don't hang
1490 */
b4519513
CW		 1491 for_each_ring(ring, dev_priv, i)
1492 wake_up_all(&ring->irq_queue);
11ed50ec
BG		 1493 }
1494
9c9fe1f8 1495 queue_work(dev_priv->wq, &dev_priv->error_work);
8a905236
JB		 1496}
1497
4e5359cd
SF		 1498static void i915_pageflip_stall_check(struct drm_device *dev, int pipe)
1499{
1500 drm_i915_private_t *dev_priv = dev->dev_private;
1501 struct drm_crtc *crtc = dev_priv->pipe_to_crtc_mapping[pipe];
1502 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
05394f39 1503 struct drm_i915_gem_object *obj;
4e5359cd
SF		 1504 struct intel_unpin_work *work;
1505 unsigned long flags;
1506 bool stall_detected;
1507
1508 /* Ignore early vblank irqs */
1509 if (intel_crtc == NULL)
1510 return;
1511
1512 spin_lock_irqsave(&dev->event_lock, flags);
1513 work = intel_crtc->unpin_work;
1514
e7d841ca
CW		 1515 if (work == NULL ||
1516 atomic_read(&work->pending) >= INTEL_FLIP_COMPLETE ||
1517 !work->enable_stall_check) {
4e5359cd
SF		 1518 /* Either the pending flip IRQ arrived, or we're too early. Don't check */
1519 spin_unlock_irqrestore(&dev->event_lock, flags);
1520 return;
1521 }
1522
1523 /* Potential stall - if we see that the flip has happened, assume a missed interrupt */
05394f39 1524 obj = work->pending_flip_obj;
a6c45cf0 1525 if (INTEL_INFO(dev)->gen >= 4) {
9db4a9c7 1526 int dspsurf = DSPSURF(intel_crtc->plane);
446f2545
AR		 1527 stall_detected = I915_HI_DISPBASE(I915_READ(dspsurf)) ==
1528 obj->gtt_offset;
4e5359cd 1529 } else {
9db4a9c7 1530 int dspaddr = DSPADDR(intel_crtc->plane);
05394f39 1531 stall_detected = I915_READ(dspaddr) == (obj->gtt_offset +
01f2c773 1532 crtc->y * crtc->fb->pitches[0] +
4e5359cd
SF		 1533 crtc->x * crtc->fb->bits_per_pixel/8);
1534 }
1535
1536 spin_unlock_irqrestore(&dev->event_lock, flags);
1537
1538 if (stall_detected) {
1539 DRM_DEBUG_DRIVER("Pageflip stall detected\n");
1540 intel_prepare_page_flip(dev, intel_crtc->plane);
1541 }
1542}
1543
42f52ef8
KP		 1544/* Called from drm generic code, passed 'crtc' which
1545 * we use as a pipe index
1546 */
f71d4af4 1547static int i915_enable_vblank(struct drm_device *dev, int pipe)
0a3e67a4
JB		 1548{
1549 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
e9d21d7f 1550 unsigned long irqflags;
71e0ffa5 1551
5eddb70b 1552 if (!i915_pipe_enabled(dev, pipe))
71e0ffa5 1553 return -EINVAL;
0a3e67a4 1554
1ec14ad3 1555 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
f796cf8f 1556 if (INTEL_INFO(dev)->gen >= 4)
7c463586
KP		 1557 i915_enable_pipestat(dev_priv, pipe,
1558 PIPE_START_VBLANK_INTERRUPT_ENABLE);
e9d21d7f 1559 else
7c463586
KP		 1560 i915_enable_pipestat(dev_priv, pipe,
1561 PIPE_VBLANK_INTERRUPT_ENABLE);
8692d00e
CW		 1562
1563 /* maintain vblank delivery even in deep C-states */
1564 if (dev_priv->info->gen == 3)
6b26c86d 1565 I915_WRITE(INSTPM, _MASKED_BIT_DISABLE(INSTPM_AGPBUSY_DIS));
1ec14ad3 1566 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
8692d00e 1567
0a3e67a4
JB		 1568 return 0;
1569}
1570
f71d4af4 1571static int ironlake_enable_vblank(struct drm_device *dev, int pipe)
f796cf8f
JB		 1572{
1573 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1574 unsigned long irqflags;
1575
1576 if (!i915_pipe_enabled(dev, pipe))
1577 return -EINVAL;
1578
1579 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
1580 ironlake_enable_display_irq(dev_priv, (pipe == 0) ?
0206e353 1581 DE_PIPEA_VBLANK : DE_PIPEB_VBLANK);
f796cf8f
JB		 1582 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
1583
1584 return 0;
1585}
1586
f71d4af4 1587static int ivybridge_enable_vblank(struct drm_device *dev, int pipe)
b1f14ad0
JB		 1588{
1589 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1590 unsigned long irqflags;
1591
1592 if (!i915_pipe_enabled(dev, pipe))
1593 return -EINVAL;
1594
1595 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
b615b57a
CW		 1596 ironlake_enable_display_irq(dev_priv,
1597 DE_PIPEA_VBLANK_IVB << (5 * pipe));
b1f14ad0
JB		 1598 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
1599
1600 return 0;
1601}
1602
7e231dbe
JB		 1603static int valleyview_enable_vblank(struct drm_device *dev, int pipe)
1604{
1605 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1606 unsigned long irqflags;
31acc7f5 1607 u32 imr;
7e231dbe
JB		 1608
1609 if (!i915_pipe_enabled(dev, pipe))
1610 return -EINVAL;
1611
1612 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
7e231dbe 1613 imr = I915_READ(VLV_IMR);
31acc7f5 1614 if (pipe == 0)
7e231dbe 1615 imr &= ~I915_DISPLAY_PIPE_A_VBLANK_INTERRUPT;
31acc7f5 1616 else
7e231dbe 1617 imr &= ~I915_DISPLAY_PIPE_B_VBLANK_INTERRUPT;
7e231dbe 1618 I915_WRITE(VLV_IMR, imr);
31acc7f5
JB		 1619 i915_enable_pipestat(dev_priv, pipe,
1620 PIPE_START_VBLANK_INTERRUPT_ENABLE);
7e231dbe
JB		 1621 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
1622
1623 return 0;
1624}
1625
42f52ef8
KP		 1626/* Called from drm generic code, passed 'crtc' which
1627 * we use as a pipe index
1628 */
f71d4af4 1629static void i915_disable_vblank(struct drm_device *dev, int pipe)
0a3e67a4
JB		 1630{
1631 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
e9d21d7f 1632 unsigned long irqflags;
0a3e67a4 1633
1ec14ad3 1634 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
8692d00e 1635 if (dev_priv->info->gen == 3)
6b26c86d 1636 I915_WRITE(INSTPM, _MASKED_BIT_ENABLE(INSTPM_AGPBUSY_DIS));
8692d00e 1637
f796cf8f
JB		 1638 i915_disable_pipestat(dev_priv, pipe,
1639 PIPE_VBLANK_INTERRUPT_ENABLE |
1640 PIPE_START_VBLANK_INTERRUPT_ENABLE);
1641 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
1642}
1643
f71d4af4 1644static void ironlake_disable_vblank(struct drm_device *dev, int pipe)
f796cf8f
JB		 1645{
1646 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1647 unsigned long irqflags;
1648
1649 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
1650 ironlake_disable_display_irq(dev_priv, (pipe == 0) ?
0206e353 1651 DE_PIPEA_VBLANK : DE_PIPEB_VBLANK);
1ec14ad3 1652 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
0a3e67a4
JB		 1653}
1654
f71d4af4 1655static void ivybridge_disable_vblank(struct drm_device *dev, int pipe)
b1f14ad0
JB		 1656{
1657 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1658 unsigned long irqflags;
1659
1660 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
b615b57a
CW		 1661 ironlake_disable_display_irq(dev_priv,
1662 DE_PIPEA_VBLANK_IVB << (pipe * 5));
b1f14ad0
JB		 1663 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
1664}
1665
7e231dbe
JB		 1666static void valleyview_disable_vblank(struct drm_device *dev, int pipe)
1667{
1668 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1669 unsigned long irqflags;
31acc7f5 1670 u32 imr;
7e231dbe
JB		 1671
1672 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
31acc7f5
JB		 1673 i915_disable_pipestat(dev_priv, pipe,
1674 PIPE_START_VBLANK_INTERRUPT_ENABLE);
7e231dbe 1675 imr = I915_READ(VLV_IMR);
31acc7f5 1676 if (pipe == 0)
7e231dbe 1677 imr |= I915_DISPLAY_PIPE_A_VBLANK_INTERRUPT;
31acc7f5 1678 else
7e231dbe 1679 imr |= I915_DISPLAY_PIPE_B_VBLANK_INTERRUPT;
7e231dbe 1680 I915_WRITE(VLV_IMR, imr);
7e231dbe
JB		 1681 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
1682}
1683
893eead0
CW		 1684static u32
1685ring_last_seqno(struct intel_ring_buffer *ring)
852835f3 1686{
893eead0
CW		 1687 return list_entry(ring->request_list.prev,
1688 struct drm_i915_gem_request, list)->seqno;
1689}
1690
1691static bool i915_hangcheck_ring_idle(struct intel_ring_buffer *ring, bool *err)
1692{
1693 if (list_empty(&ring->request_list) ||
b2eadbc8
CW		 1694 i915_seqno_passed(ring->get_seqno(ring, false),
1695 ring_last_seqno(ring))) {
893eead0 1696 /* Issue a wake-up to catch stuck h/w. */
9574b3fe
BW		 1697 if (waitqueue_active(&ring->irq_queue)) {
1698 DRM_ERROR("Hangcheck timer elapsed... %s idle\n",
1699 ring->name);
893eead0
CW		 1700 wake_up_all(&ring->irq_queue);
1701 *err = true;
1702 }
1703 return true;
1704 }
1705 return false;
f65d9421
BG		 1706}
1707
1ec14ad3
CW		 1708static bool kick_ring(struct intel_ring_buffer *ring)
1709{
1710 struct drm_device *dev = ring->dev;
1711 struct drm_i915_private *dev_priv = dev->dev_private;
1712 u32 tmp = I915_READ_CTL(ring);
1713 if (tmp & RING_WAIT) {
1714 DRM_ERROR("Kicking stuck wait on %s\n",
1715 ring->name);
1716 I915_WRITE_CTL(ring, tmp);
1717 return true;
1718 }
1ec14ad3
CW		 1719 return false;
1720}
1721
d1e61e7f
CW		 1722static bool i915_hangcheck_hung(struct drm_device *dev)
1723{
1724 drm_i915_private_t *dev_priv = dev->dev_private;
1725
1726 if (dev_priv->hangcheck_count++ > 1) {
b4519513
CW		 1727 bool hung = true;
1728
d1e61e7f
CW		 1729 DRM_ERROR("Hangcheck timer elapsed... GPU hung\n");
1730 i915_handle_error(dev, true);
1731
1732 if (!IS_GEN2(dev)) {
b4519513
CW		 1733 struct intel_ring_buffer *ring;
1734 int i;
1735
d1e61e7f
CW		 1736 /* Is the chip hanging on a WAIT_FOR_EVENT?
1737 * If so we can simply poke the RB_WAIT bit
1738 * and break the hang. This should work on
1739 * all but the second generation chipsets.
1740 */
b4519513
CW		 1741 for_each_ring(ring, dev_priv, i)
1742 hung &= !kick_ring(ring);
d1e61e7f
CW		 1743 }
1744
b4519513 1745 return hung;
d1e61e7f
CW		 1746 }
1747
1748 return false;
1749}
1750
f65d9421
BG		 1751/**
1752 * This is called when the chip hasn't reported back with completed
1753 * batchbuffers in a long time. The first time this is called we simply record
1754 * ACTHD. If ACTHD hasn't changed by the time the hangcheck timer elapses
1755 * again, we assume the chip is wedged and try to fix it.
1756 */
1757void i915_hangcheck_elapsed(unsigned long data)
1758{
1759 struct drm_device *dev = (struct drm_device *)data;
1760 drm_i915_private_t *dev_priv = dev->dev_private;
bd9854f9 1761 uint32_t acthd[I915_NUM_RINGS], instdone[I915_NUM_INSTDONE_REG];
b4519513
CW		 1762 struct intel_ring_buffer *ring;
1763 bool err = false, idle;
1764 int i;
893eead0 1765
3e0dc6b0
BW		 1766 if (!i915_enable_hangcheck)
1767 return;
1768
b4519513
CW		 1769 memset(acthd, 0, sizeof(acthd));
1770 idle = true;
1771 for_each_ring(ring, dev_priv, i) {
1772 idle &= i915_hangcheck_ring_idle(ring, &err);
1773 acthd[i] = intel_ring_get_active_head(ring);
1774 }
1775
893eead0 1776 /* If all work is done then ACTHD clearly hasn't advanced. */
b4519513 1777 if (idle) {
d1e61e7f
CW		 1778 if (err) {
1779 if (i915_hangcheck_hung(dev))
1780 return;
1781
893eead0 1782 goto repeat;
d1e61e7f
CW		 1783 }
1784
1785 dev_priv->hangcheck_count = 0;
893eead0
CW		 1786 return;
1787 }
b9201c14 1788
bd9854f9 1789 i915_get_extra_instdone(dev, instdone);
b4519513 1790 if (memcmp(dev_priv->last_acthd, acthd, sizeof(acthd)) == 0 &&
050ee91f 1791 memcmp(dev_priv->prev_instdone, instdone, sizeof(instdone)) == 0) {
d1e61e7f 1792 if (i915_hangcheck_hung(dev))
cbb465e7 1793 return;
cbb465e7
CW		 1794 } else {
1795 dev_priv->hangcheck_count = 0;
1796
b4519513 1797 memcpy(dev_priv->last_acthd, acthd, sizeof(acthd));
050ee91f 1798 memcpy(dev_priv->prev_instdone, instdone, sizeof(instdone));
cbb465e7 1799 }
f65d9421 1800
893eead0 1801repeat:
f65d9421 1802 /* Reset timer case chip hangs without another request being added */
b3b079db 1803 mod_timer(&dev_priv->hangcheck_timer,
cecc21fe 1804 round_jiffies_up(jiffies + DRM_I915_HANGCHECK_JIFFIES));
f65d9421
BG		 1805}
1806
1da177e4
LT		 1807/* drm_dma.h hooks
1808*/
f71d4af4 1809static void ironlake_irq_preinstall(struct drm_device *dev)
036a4a7d
ZW		 1810{
1811 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1812
4697995b
JB		 1813 atomic_set(&dev_priv->irq_received, 0);
1814
036a4a7d 1815 I915_WRITE(HWSTAM, 0xeffe);
bdfcdb63 1816
036a4a7d
ZW		 1817 /* XXX hotplug from PCH */
1818
1819 I915_WRITE(DEIMR, 0xffffffff);
1820 I915_WRITE(DEIER, 0x0);
3143a2bf 1821 POSTING_READ(DEIER);
036a4a7d
ZW		 1822
1823 /* and GT */
1824 I915_WRITE(GTIMR, 0xffffffff);
1825 I915_WRITE(GTIER, 0x0);
3143a2bf 1826 POSTING_READ(GTIER);
c650156a
ZW		 1827
1828 /* south display irq */
1829 I915_WRITE(SDEIMR, 0xffffffff);
1830 I915_WRITE(SDEIER, 0x0);
3143a2bf 1831 POSTING_READ(SDEIER);
036a4a7d
ZW		 1832}
1833
7e231dbe
JB		 1834static void valleyview_irq_preinstall(struct drm_device *dev)
1835{
1836 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1837 int pipe;
1838
1839 atomic_set(&dev_priv->irq_received, 0);
1840
7e231dbe
JB		 1841 /* VLV magic */
1842 I915_WRITE(VLV_IMR, 0);
1843 I915_WRITE(RING_IMR(RENDER_RING_BASE), 0);
1844 I915_WRITE(RING_IMR(GEN6_BSD_RING_BASE), 0);
1845 I915_WRITE(RING_IMR(BLT_RING_BASE), 0);
1846
7e231dbe
JB		 1847 /* and GT */
1848 I915_WRITE(GTIIR, I915_READ(GTIIR));
1849 I915_WRITE(GTIIR, I915_READ(GTIIR));
1850 I915_WRITE(GTIMR, 0xffffffff);
1851 I915_WRITE(GTIER, 0x0);
1852 POSTING_READ(GTIER);
1853
1854 I915_WRITE(DPINVGTT, 0xff);
1855
1856 I915_WRITE(PORT_HOTPLUG_EN, 0);
1857 I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
1858 for_each_pipe(pipe)
1859 I915_WRITE(PIPESTAT(pipe), 0xffff);
1860 I915_WRITE(VLV_IIR, 0xffffffff);
1861 I915_WRITE(VLV_IMR, 0xffffffff);
1862 I915_WRITE(VLV_IER, 0x0);
1863 POSTING_READ(VLV_IER);
1864}
1865
7fe0b973
KP		 1866/*
1867 * Enable digital hotplug on the PCH, and configure the DP short pulse
1868 * duration to 2ms (which is the minimum in the Display Port spec)
1869 *
1870 * This register is the same on all known PCH chips.
1871 */
1872
1873static void ironlake_enable_pch_hotplug(struct drm_device *dev)
1874{
1875 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1876 u32 hotplug;
1877
1878 hotplug = I915_READ(PCH_PORT_HOTPLUG);
1879 hotplug &= ~(PORTD_PULSE_DURATION_MASK|PORTC_PULSE_DURATION_MASK|PORTB_PULSE_DURATION_MASK);
1880 hotplug |= PORTD_HOTPLUG_ENABLE | PORTD_PULSE_DURATION_2ms;
1881 hotplug |= PORTC_HOTPLUG_ENABLE | PORTC_PULSE_DURATION_2ms;
1882 hotplug |= PORTB_HOTPLUG_ENABLE | PORTB_PULSE_DURATION_2ms;
1883 I915_WRITE(PCH_PORT_HOTPLUG, hotplug);
1884}
1885
f71d4af4 1886static int ironlake_irq_postinstall(struct drm_device *dev)
036a4a7d
ZW		 1887{
1888 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1889 /* enable kind of interrupts always enabled */
013d5aa2 1890 u32 display_mask = DE_MASTER_IRQ_CONTROL | DE_GSE | DE_PCH_EVENT |
ce99c256
DV		 1891 DE_PLANEA_FLIP_DONE | DE_PLANEB_FLIP_DONE |
1892 DE_AUX_CHANNEL_A;
1ec14ad3 1893 u32 render_irqs;
2d7b8366 1894 u32 hotplug_mask;
036a4a7d 1895
1ec14ad3 1896 dev_priv->irq_mask = ~display_mask;
036a4a7d
ZW		 1897
1898 /* should always can generate irq */
1899 I915_WRITE(DEIIR, I915_READ(DEIIR));
1ec14ad3
CW		 1900 I915_WRITE(DEIMR, dev_priv->irq_mask);
1901 I915_WRITE(DEIER, display_mask | DE_PIPEA_VBLANK | DE_PIPEB_VBLANK);
3143a2bf 1902 POSTING_READ(DEIER);
036a4a7d 1903
1ec14ad3 1904 dev_priv->gt_irq_mask = ~0;
036a4a7d
ZW		 1905
1906 I915_WRITE(GTIIR, I915_READ(GTIIR));
1ec14ad3 1907 I915_WRITE(GTIMR, dev_priv->gt_irq_mask);
881f47b6 1908
1ec14ad3
CW		 1909 if (IS_GEN6(dev))
1910 render_irqs =
1911 GT_USER_INTERRUPT |
e2a1e2f0
BW		 1912 GEN6_BSD_USER_INTERRUPT |
1913 GEN6_BLITTER_USER_INTERRUPT;
1ec14ad3
CW		 1914 else
1915 render_irqs =
88f23b8f 1916 GT_USER_INTERRUPT |
c6df541c 1917 GT_PIPE_NOTIFY |
1ec14ad3
CW		 1918 GT_BSD_USER_INTERRUPT;
1919 I915_WRITE(GTIER, render_irqs);
3143a2bf 1920 POSTING_READ(GTIER);
036a4a7d 1921
2d7b8366 1922 if (HAS_PCH_CPT(dev)) {
9035a97a
CW		 1923 hotplug_mask = (SDE_CRT_HOTPLUG_CPT |
1924 SDE_PORTB_HOTPLUG_CPT |
1925 SDE_PORTC_HOTPLUG_CPT |
515ac2bb 1926 SDE_PORTD_HOTPLUG_CPT |
ce99c256
DV		 1927 SDE_GMBUS_CPT |
1928 SDE_AUX_MASK_CPT);
2d7b8366 1929 } else {
9035a97a
CW		 1930 hotplug_mask = (SDE_CRT_HOTPLUG |
1931 SDE_PORTB_HOTPLUG |
1932 SDE_PORTC_HOTPLUG |
1933 SDE_PORTD_HOTPLUG |
515ac2bb 1934 SDE_GMBUS |
9035a97a 1935 SDE_AUX_MASK);
2d7b8366
YL		 1936 }
1937
1ec14ad3 1938 dev_priv->pch_irq_mask = ~hotplug_mask;
c650156a
ZW		 1939
1940 I915_WRITE(SDEIIR, I915_READ(SDEIIR));
1ec14ad3
CW		 1941 I915_WRITE(SDEIMR, dev_priv->pch_irq_mask);
1942 I915_WRITE(SDEIER, hotplug_mask);
3143a2bf 1943 POSTING_READ(SDEIER);
c650156a 1944
7fe0b973
KP		 1945 ironlake_enable_pch_hotplug(dev);
1946
f97108d1
JB		 1947 if (IS_IRONLAKE_M(dev)) {
1948 /* Clear & enable PCU event interrupts */
1949 I915_WRITE(DEIIR, DE_PCU_EVENT);
1950 I915_WRITE(DEIER, I915_READ(DEIER) | DE_PCU_EVENT);
1951 ironlake_enable_display_irq(dev_priv, DE_PCU_EVENT);
1952 }
1953
036a4a7d
ZW		 1954 return 0;
1955}
1956
f71d4af4 1957static int ivybridge_irq_postinstall(struct drm_device *dev)
b1f14ad0
JB		 1958{
1959 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1960 /* enable kind of interrupts always enabled */
b615b57a
CW		 1961 u32 display_mask =
1962 DE_MASTER_IRQ_CONTROL | DE_GSE_IVB | DE_PCH_EVENT_IVB |
1963 DE_PLANEC_FLIP_DONE_IVB |
1964 DE_PLANEB_FLIP_DONE_IVB |
ce99c256
DV		 1965 DE_PLANEA_FLIP_DONE_IVB |
1966 DE_AUX_CHANNEL_A_IVB;
b1f14ad0
JB		 1967 u32 render_irqs;
1968 u32 hotplug_mask;
1969
b1f14ad0
JB		 1970 dev_priv->irq_mask = ~display_mask;
1971
1972 /* should always can generate irq */
1973 I915_WRITE(DEIIR, I915_READ(DEIIR));
1974 I915_WRITE(DEIMR, dev_priv->irq_mask);
b615b57a
CW		 1975 I915_WRITE(DEIER,
1976 display_mask |
1977 DE_PIPEC_VBLANK_IVB |
1978 DE_PIPEB_VBLANK_IVB |
1979 DE_PIPEA_VBLANK_IVB);
b1f14ad0
JB		 1980 POSTING_READ(DEIER);
1981
15b9f80e 1982 dev_priv->gt_irq_mask = ~GT_GEN7_L3_PARITY_ERROR_INTERRUPT;
b1f14ad0
JB		 1983
1984 I915_WRITE(GTIIR, I915_READ(GTIIR));
1985 I915_WRITE(GTIMR, dev_priv->gt_irq_mask);
1986
e2a1e2f0 1987 render_irqs = GT_USER_INTERRUPT | GEN6_BSD_USER_INTERRUPT |
15b9f80e 1988 GEN6_BLITTER_USER_INTERRUPT | GT_GEN7_L3_PARITY_ERROR_INTERRUPT;
b1f14ad0
JB		 1989 I915_WRITE(GTIER, render_irqs);
1990 POSTING_READ(GTIER);
1991
1992 hotplug_mask = (SDE_CRT_HOTPLUG_CPT |
1993 SDE_PORTB_HOTPLUG_CPT |
1994 SDE_PORTC_HOTPLUG_CPT |
515ac2bb 1995 SDE_PORTD_HOTPLUG_CPT |
ce99c256
DV		 1996 SDE_GMBUS_CPT |
1997 SDE_AUX_MASK_CPT);
b1f14ad0
JB		 1998 dev_priv->pch_irq_mask = ~hotplug_mask;
1999
2000 I915_WRITE(SDEIIR, I915_READ(SDEIIR));
2001 I915_WRITE(SDEIMR, dev_priv->pch_irq_mask);
2002 I915_WRITE(SDEIER, hotplug_mask);
2003 POSTING_READ(SDEIER);
2004
7fe0b973
KP		 2005 ironlake_enable_pch_hotplug(dev);
2006
b1f14ad0
JB		 2007 return 0;
2008}
2009
7e231dbe
JB		 2010static int valleyview_irq_postinstall(struct drm_device *dev)
2011{
2012 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
7e231dbe 2013 u32 enable_mask;
31acc7f5 2014 u32 pipestat_enable = PLANE_FLIP_DONE_INT_EN_VLV;
3bcedbe5 2015 u32 render_irqs;
7e231dbe
JB		 2016 u16 msid;
2017
2018 enable_mask = I915_DISPLAY_PORT_INTERRUPT;
31acc7f5
JB		 2019 enable_mask |= I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
2020 I915_DISPLAY_PIPE_A_VBLANK_INTERRUPT |
2021 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
7e231dbe
JB		 2022 I915_DISPLAY_PIPE_B_VBLANK_INTERRUPT;
2023
31acc7f5
JB		 2024 /*
2025 *Leave vblank interrupts masked initially. enable/disable will
2026 * toggle them based on usage.
2027 */
2028 dev_priv->irq_mask = (~enable_mask) |
2029 I915_DISPLAY_PIPE_A_VBLANK_INTERRUPT |
2030 I915_DISPLAY_PIPE_B_VBLANK_INTERRUPT;
7e231dbe 2031
7e231dbe
JB		 2032 dev_priv->pipestat[0] = 0;
2033 dev_priv->pipestat[1] = 0;
2034
7e231dbe
JB		 2035 /* Hack for broken MSIs on VLV */
2036 pci_write_config_dword(dev_priv->dev->pdev, 0x94, 0xfee00000);
2037 pci_read_config_word(dev->pdev, 0x98, &msid);
2038 msid &= 0xff; /* mask out delivery bits */
2039 msid |= (1<<14);
2040 pci_write_config_word(dev_priv->dev->pdev, 0x98, msid);
2041
20afbda2
DV		 2042 I915_WRITE(PORT_HOTPLUG_EN, 0);
2043 POSTING_READ(PORT_HOTPLUG_EN);
2044
7e231dbe
JB		 2045 I915_WRITE(VLV_IMR, dev_priv->irq_mask);
2046 I915_WRITE(VLV_IER, enable_mask);
2047 I915_WRITE(VLV_IIR, 0xffffffff);
2048 I915_WRITE(PIPESTAT(0), 0xffff);
2049 I915_WRITE(PIPESTAT(1), 0xffff);
2050 POSTING_READ(VLV_IER);
2051
31acc7f5 2052 i915_enable_pipestat(dev_priv, 0, pipestat_enable);
515ac2bb 2053 i915_enable_pipestat(dev_priv, 0, PIPE_GMBUS_EVENT_ENABLE);
31acc7f5
JB		 2054 i915_enable_pipestat(dev_priv, 1, pipestat_enable);
2055
7e231dbe
JB		 2056 I915_WRITE(VLV_IIR, 0xffffffff);
2057 I915_WRITE(VLV_IIR, 0xffffffff);
2058
7e231dbe 2059 I915_WRITE(GTIIR, I915_READ(GTIIR));
31acc7f5 2060 I915_WRITE(GTIMR, dev_priv->gt_irq_mask);
3bcedbe5
JB		 2061
2062 render_irqs = GT_USER_INTERRUPT | GEN6_BSD_USER_INTERRUPT |
2063 GEN6_BLITTER_USER_INTERRUPT;
2064 I915_WRITE(GTIER, render_irqs);
7e231dbe
JB		 2065 POSTING_READ(GTIER);
2066
2067 /* ack & enable invalid PTE error interrupts */
2068#if 0 /* FIXME: add support to irq handler for checking these bits */
2069 I915_WRITE(DPINVGTT, DPINVGTT_STATUS_MASK);
2070 I915_WRITE(DPINVGTT, DPINVGTT_EN_MASK);
2071#endif
2072
2073 I915_WRITE(VLV_MASTER_IER, MASTER_INTERRUPT_ENABLE);
20afbda2
DV		 2074
2075 return 0;
2076}
2077
2078static void valleyview_hpd_irq_setup(struct drm_device *dev)
2079{
2080 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2081 u32 hotplug_en = I915_READ(PORT_HOTPLUG_EN);
2082
7e231dbe
JB		 2083 /* Note HDMI and DP share bits */
2084 if (dev_priv->hotplug_supported_mask & HDMIB_HOTPLUG_INT_STATUS)
2085 hotplug_en |= HDMIB_HOTPLUG_INT_EN;
2086 if (dev_priv->hotplug_supported_mask & HDMIC_HOTPLUG_INT_STATUS)
2087 hotplug_en |= HDMIC_HOTPLUG_INT_EN;
2088 if (dev_priv->hotplug_supported_mask & HDMID_HOTPLUG_INT_STATUS)
2089 hotplug_en |= HDMID_HOTPLUG_INT_EN;
ae33cdcf 2090 if (dev_priv->hotplug_supported_mask & SDVOC_HOTPLUG_INT_STATUS_I915)
7e231dbe 2091 hotplug_en |= SDVOC_HOTPLUG_INT_EN;
ae33cdcf 2092 if (dev_priv->hotplug_supported_mask & SDVOB_HOTPLUG_INT_STATUS_I915)
7e231dbe
JB		 2093 hotplug_en |= SDVOB_HOTPLUG_INT_EN;
2094 if (dev_priv->hotplug_supported_mask & CRT_HOTPLUG_INT_STATUS) {
2095 hotplug_en |= CRT_HOTPLUG_INT_EN;
2096 hotplug_en |= CRT_HOTPLUG_VOLTAGE_COMPARE_50;
2097 }
7e231dbe
JB		 2098
2099 I915_WRITE(PORT_HOTPLUG_EN, hotplug_en);
7e231dbe
JB		 2100}
2101
7e231dbe
JB		 2102static void valleyview_irq_uninstall(struct drm_device *dev)
2103{
2104 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2105 int pipe;
2106
2107 if (!dev_priv)
2108 return;
2109
7e231dbe
JB		 2110 for_each_pipe(pipe)
2111 I915_WRITE(PIPESTAT(pipe), 0xffff);
2112
2113 I915_WRITE(HWSTAM, 0xffffffff);
2114 I915_WRITE(PORT_HOTPLUG_EN, 0);
2115 I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
2116 for_each_pipe(pipe)
2117 I915_WRITE(PIPESTAT(pipe), 0xffff);
2118 I915_WRITE(VLV_IIR, 0xffffffff);
2119 I915_WRITE(VLV_IMR, 0xffffffff);
2120 I915_WRITE(VLV_IER, 0x0);
2121 POSTING_READ(VLV_IER);
2122}
2123
f71d4af4 2124static void ironlake_irq_uninstall(struct drm_device *dev)
036a4a7d
ZW		 2125{
2126 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
4697995b
JB		 2127
2128 if (!dev_priv)
2129 return;
2130
036a4a7d
ZW		 2131 I915_WRITE(HWSTAM, 0xffffffff);
2132
2133 I915_WRITE(DEIMR, 0xffffffff);
2134 I915_WRITE(DEIER, 0x0);
2135 I915_WRITE(DEIIR, I915_READ(DEIIR));
2136
2137 I915_WRITE(GTIMR, 0xffffffff);
2138 I915_WRITE(GTIER, 0x0);
2139 I915_WRITE(GTIIR, I915_READ(GTIIR));
192aac1f
KP		 2140
2141 I915_WRITE(SDEIMR, 0xffffffff);
2142 I915_WRITE(SDEIER, 0x0);
2143 I915_WRITE(SDEIIR, I915_READ(SDEIIR));
036a4a7d
ZW		 2144}
2145
a266c7d5 2146static void i8xx_irq_preinstall(struct drm_device * dev)
1da177e4
LT		 2147{
2148 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
9db4a9c7 2149 int pipe;
91e3738e 2150
a266c7d5 2151 atomic_set(&dev_priv->irq_received, 0);
5ca58282 2152
9db4a9c7
JB		 2153 for_each_pipe(pipe)
2154 I915_WRITE(PIPESTAT(pipe), 0);
a266c7d5
CW		 2155 I915_WRITE16(IMR, 0xffff);
2156 I915_WRITE16(IER, 0x0);
2157 POSTING_READ16(IER);
c2798b19
CW		 2158}
2159
2160static int i8xx_irq_postinstall(struct drm_device *dev)
2161{
2162 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2163
c2798b19
CW		 2164 dev_priv->pipestat[0] = 0;
2165 dev_priv->pipestat[1] = 0;
2166
2167 I915_WRITE16(EMR,
2168 ~(I915_ERROR_PAGE_TABLE | I915_ERROR_MEMORY_REFRESH));
2169
2170 /* Unmask the interrupts that we always want on. */
2171 dev_priv->irq_mask =
2172 ~(I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
2173 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
2174 I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
2175 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT |
2176 I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT);
2177 I915_WRITE16(IMR, dev_priv->irq_mask);
2178
2179 I915_WRITE16(IER,
2180 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
2181 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
2182 I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT |
2183 I915_USER_INTERRUPT);
2184 POSTING_READ16(IER);
2185
2186 return 0;
2187}
2188
ff1f525e 2189static irqreturn_t i8xx_irq_handler(int irq, void *arg)
c2798b19
CW		 2190{
2191 struct drm_device *dev = (struct drm_device *) arg;
2192 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
c2798b19
CW		 2193 u16 iir, new_iir;
2194 u32 pipe_stats[2];
2195 unsigned long irqflags;
2196 int irq_received;
2197 int pipe;
2198 u16 flip_mask =
2199 I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
2200 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT;
2201
2202 atomic_inc(&dev_priv->irq_received);
2203
2204 iir = I915_READ16(IIR);
2205 if (iir == 0)
2206 return IRQ_NONE;
2207
2208 while (iir & ~flip_mask) {
2209 /* Can't rely on pipestat interrupt bit in iir as it might
2210 * have been cleared after the pipestat interrupt was received.
2211 * It doesn't set the bit in iir again, but it still produces
2212 * interrupts (for non-MSI).
2213 */
2214 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
2215 if (iir & I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT)
2216 i915_handle_error(dev, false);
2217
2218 for_each_pipe(pipe) {
2219 int reg = PIPESTAT(pipe);
2220 pipe_stats[pipe] = I915_READ(reg);
2221
2222 /*
2223 * Clear the PIPE*STAT regs before the IIR
2224 */
2225 if (pipe_stats[pipe] & 0x8000ffff) {
2226 if (pipe_stats[pipe] & PIPE_FIFO_UNDERRUN_STATUS)
2227 DRM_DEBUG_DRIVER("pipe %c underrun\n",
2228 pipe_name(pipe));
2229 I915_WRITE(reg, pipe_stats[pipe]);
2230 irq_received = 1;
2231 }
2232 }
2233 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
2234
2235 I915_WRITE16(IIR, iir & ~flip_mask);
2236 new_iir = I915_READ16(IIR); /* Flush posted writes */
2237
d05c617e 2238 i915_update_dri1_breadcrumb(dev);
c2798b19
CW		 2239
2240 if (iir & I915_USER_INTERRUPT)
2241 notify_ring(dev, &dev_priv->ring[RCS]);
2242
2243 if (pipe_stats[0] & PIPE_VBLANK_INTERRUPT_STATUS &&
2244 drm_handle_vblank(dev, 0)) {
2245 if (iir & I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT) {
2246 intel_prepare_page_flip(dev, 0);
2247 intel_finish_page_flip(dev, 0);
2248 flip_mask &= ~I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT;
2249 }
2250 }
2251
2252 if (pipe_stats[1] & PIPE_VBLANK_INTERRUPT_STATUS &&
2253 drm_handle_vblank(dev, 1)) {
2254 if (iir & I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT) {
2255 intel_prepare_page_flip(dev, 1);
2256 intel_finish_page_flip(dev, 1);
2257 flip_mask &= ~I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT;
2258 }
2259 }
2260
2261 iir = new_iir;
2262 }
2263
2264 return IRQ_HANDLED;
2265}
2266
2267static void i8xx_irq_uninstall(struct drm_device * dev)
2268{
2269 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2270 int pipe;
2271
c2798b19
CW		 2272 for_each_pipe(pipe) {
2273 /* Clear enable bits; then clear status bits */
2274 I915_WRITE(PIPESTAT(pipe), 0);
2275 I915_WRITE(PIPESTAT(pipe), I915_READ(PIPESTAT(pipe)));
2276 }
2277 I915_WRITE16(IMR, 0xffff);
2278 I915_WRITE16(IER, 0x0);
2279 I915_WRITE16(IIR, I915_READ16(IIR));
2280}
2281
a266c7d5
CW		 2282static void i915_irq_preinstall(struct drm_device * dev)
2283{
2284 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2285 int pipe;
2286
2287 atomic_set(&dev_priv->irq_received, 0);
2288
2289 if (I915_HAS_HOTPLUG(dev)) {
2290 I915_WRITE(PORT_HOTPLUG_EN, 0);
2291 I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
2292 }
2293
00d98ebd 2294 I915_WRITE16(HWSTAM, 0xeffe);
a266c7d5
CW		 2295 for_each_pipe(pipe)
2296 I915_WRITE(PIPESTAT(pipe), 0);
2297 I915_WRITE(IMR, 0xffffffff);
2298 I915_WRITE(IER, 0x0);
2299 POSTING_READ(IER);
2300}
2301
2302static int i915_irq_postinstall(struct drm_device *dev)
2303{
2304 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
38bde180 2305 u32 enable_mask;
a266c7d5 2306
a266c7d5
CW		 2307 dev_priv->pipestat[0] = 0;
2308 dev_priv->pipestat[1] = 0;
2309
38bde180
CW		 2310 I915_WRITE(EMR, ~(I915_ERROR_PAGE_TABLE | I915_ERROR_MEMORY_REFRESH));
2311
2312 /* Unmask the interrupts that we always want on. */
2313 dev_priv->irq_mask =
2314 ~(I915_ASLE_INTERRUPT |
2315 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
2316 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
2317 I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
2318 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT |
2319 I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT);
2320
2321 enable_mask =
2322 I915_ASLE_INTERRUPT |
2323 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
2324 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
2325 I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT |
2326 I915_USER_INTERRUPT;
2327
a266c7d5 2328 if (I915_HAS_HOTPLUG(dev)) {
20afbda2
DV		 2329 I915_WRITE(PORT_HOTPLUG_EN, 0);
2330 POSTING_READ(PORT_HOTPLUG_EN);
2331
a266c7d5
CW		 2332 /* Enable in IER... */
2333 enable_mask |= I915_DISPLAY_PORT_INTERRUPT;
2334 /* and unmask in IMR */
2335 dev_priv->irq_mask &= ~I915_DISPLAY_PORT_INTERRUPT;
2336 }
2337
a266c7d5
CW		 2338 I915_WRITE(IMR, dev_priv->irq_mask);
2339 I915_WRITE(IER, enable_mask);
2340 POSTING_READ(IER);
2341
20afbda2
DV		 2342 intel_opregion_enable_asle(dev);
2343
2344 return 0;
2345}
2346
2347static void i915_hpd_irq_setup(struct drm_device *dev)
2348{
2349 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2350 u32 hotplug_en;
2351
a266c7d5 2352 if (I915_HAS_HOTPLUG(dev)) {
20afbda2 2353 hotplug_en = I915_READ(PORT_HOTPLUG_EN);
a266c7d5 2354
a266c7d5
CW		 2355 if (dev_priv->hotplug_supported_mask & HDMIB_HOTPLUG_INT_STATUS)
2356 hotplug_en |= HDMIB_HOTPLUG_INT_EN;
2357 if (dev_priv->hotplug_supported_mask & HDMIC_HOTPLUG_INT_STATUS)
2358 hotplug_en |= HDMIC_HOTPLUG_INT_EN;
2359 if (dev_priv->hotplug_supported_mask & HDMID_HOTPLUG_INT_STATUS)
2360 hotplug_en |= HDMID_HOTPLUG_INT_EN;
084b612e 2361 if (dev_priv->hotplug_supported_mask & SDVOC_HOTPLUG_INT_STATUS_I915)
a266c7d5 2362 hotplug_en |= SDVOC_HOTPLUG_INT_EN;
084b612e 2363 if (dev_priv->hotplug_supported_mask & SDVOB_HOTPLUG_INT_STATUS_I915)
a266c7d5
CW		 2364 hotplug_en |= SDVOB_HOTPLUG_INT_EN;
2365 if (dev_priv->hotplug_supported_mask & CRT_HOTPLUG_INT_STATUS) {
2366 hotplug_en |= CRT_HOTPLUG_INT_EN;
a266c7d5
CW		 2367 hotplug_en |= CRT_HOTPLUG_VOLTAGE_COMPARE_50;
2368 }
2369
2370 /* Ignore TV since it's buggy */
2371
2372 I915_WRITE(PORT_HOTPLUG_EN, hotplug_en);
2373 }
a266c7d5
CW		 2374}
2375
ff1f525e 2376static irqreturn_t i915_irq_handler(int irq, void *arg)
a266c7d5
CW		 2377{
2378 struct drm_device *dev = (struct drm_device *) arg;
2379 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
8291ee90 2380 u32 iir, new_iir, pipe_stats[I915_MAX_PIPES];
a266c7d5 2381 unsigned long irqflags;
38bde180
CW		 2382 u32 flip_mask =
2383 I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
2384 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT;
2385 u32 flip[2] = {
2386 I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT,
2387 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT
2388 };
2389 int pipe, ret = IRQ_NONE;
a266c7d5
CW		 2390
2391 atomic_inc(&dev_priv->irq_received);
2392
2393 iir = I915_READ(IIR);
38bde180
CW		 2394 do {
2395 bool irq_received = (iir & ~flip_mask) != 0;
8291ee90 2396 bool blc_event = false;
a266c7d5
CW		 2397
2398 /* Can't rely on pipestat interrupt bit in iir as it might
2399 * have been cleared after the pipestat interrupt was received.
2400 * It doesn't set the bit in iir again, but it still produces
2401 * interrupts (for non-MSI).
2402 */
2403 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
2404 if (iir & I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT)
2405 i915_handle_error(dev, false);
2406
2407 for_each_pipe(pipe) {
2408 int reg = PIPESTAT(pipe);
2409 pipe_stats[pipe] = I915_READ(reg);
2410
38bde180 2411 /* Clear the PIPE*STAT regs before the IIR */
a266c7d5
CW		 2412 if (pipe_stats[pipe] & 0x8000ffff) {
2413 if (pipe_stats[pipe] & PIPE_FIFO_UNDERRUN_STATUS)
2414 DRM_DEBUG_DRIVER("pipe %c underrun\n",
2415 pipe_name(pipe));
2416 I915_WRITE(reg, pipe_stats[pipe]);
38bde180 2417 irq_received = true;
a266c7d5
CW		 2418 }
2419 }
2420 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
2421
2422 if (!irq_received)
2423 break;
2424
a266c7d5
CW		 2425 /* Consume port. Then clear IIR or we'll miss events */
2426 if ((I915_HAS_HOTPLUG(dev)) &&
2427 (iir & I915_DISPLAY_PORT_INTERRUPT)) {
2428 u32 hotplug_status = I915_READ(PORT_HOTPLUG_STAT);
2429
2430 DRM_DEBUG_DRIVER("hotplug event received, stat 0x%08x\n",
2431 hotplug_status);
2432 if (hotplug_status & dev_priv->hotplug_supported_mask)
2433 queue_work(dev_priv->wq,
2434 &dev_priv->hotplug_work);
2435
2436 I915_WRITE(PORT_HOTPLUG_STAT, hotplug_status);
38bde180 2437 POSTING_READ(PORT_HOTPLUG_STAT);
a266c7d5
CW		 2438 }
2439
38bde180 2440 I915_WRITE(IIR, iir & ~flip_mask);
a266c7d5
CW		 2441 new_iir = I915_READ(IIR); /* Flush posted writes */
2442
a266c7d5
CW		 2443 if (iir & I915_USER_INTERRUPT)
2444 notify_ring(dev, &dev_priv->ring[RCS]);
a266c7d5 2445
a266c7d5 2446 for_each_pipe(pipe) {
38bde180
CW		 2447 int plane = pipe;
2448 if (IS_MOBILE(dev))
2449 plane = !plane;
8291ee90 2450 if (pipe_stats[pipe] & PIPE_VBLANK_INTERRUPT_STATUS &&
a266c7d5 2451 drm_handle_vblank(dev, pipe)) {
38bde180
CW		 2452 if (iir & flip[plane]) {
2453 intel_prepare_page_flip(dev, plane);
2454 intel_finish_page_flip(dev, pipe);
2455 flip_mask &= ~flip[plane];
2456 }
a266c7d5
CW		 2457 }
2458
2459 if (pipe_stats[pipe] & PIPE_LEGACY_BLC_EVENT_STATUS)
2460 blc_event = true;
2461 }
2462
a266c7d5
CW		 2463 if (blc_event || (iir & I915_ASLE_INTERRUPT))
2464 intel_opregion_asle_intr(dev);
2465
2466 /* With MSI, interrupts are only generated when iir
2467 * transitions from zero to nonzero. If another bit got
2468 * set while we were handling the existing iir bits, then
2469 * we would never get another interrupt.
2470 *
2471 * This is fine on non-MSI as well, as if we hit this path
2472 * we avoid exiting the interrupt handler only to generate
2473 * another one.
2474 *
2475 * Note that for MSI this could cause a stray interrupt report
2476 * if an interrupt landed in the time between writing IIR and
2477 * the posting read. This should be rare enough to never
2478 * trigger the 99% of 100,000 interrupts test for disabling
2479 * stray interrupts.
2480 */
38bde180 2481 ret = IRQ_HANDLED;
a266c7d5 2482 iir = new_iir;
38bde180 2483 } while (iir & ~flip_mask);
a266c7d5 2484
d05c617e 2485 i915_update_dri1_breadcrumb(dev);
8291ee90 2486
a266c7d5
CW		 2487 return ret;
2488}
2489
2490static void i915_irq_uninstall(struct drm_device * dev)
2491{
2492 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2493 int pipe;
2494
a266c7d5
CW		 2495 if (I915_HAS_HOTPLUG(dev)) {
2496 I915_WRITE(PORT_HOTPLUG_EN, 0);
2497 I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
2498 }
2499
00d98ebd 2500 I915_WRITE16(HWSTAM, 0xffff);
55b39755
CW		 2501 for_each_pipe(pipe) {
2502 /* Clear enable bits; then clear status bits */
a266c7d5 2503 I915_WRITE(PIPESTAT(pipe), 0);
55b39755
CW		 2504 I915_WRITE(PIPESTAT(pipe), I915_READ(PIPESTAT(pipe)));
2505 }
a266c7d5
CW		 2506 I915_WRITE(IMR, 0xffffffff);
2507 I915_WRITE(IER, 0x0);
2508
a266c7d5
CW		 2509 I915_WRITE(IIR, I915_READ(IIR));
2510}
2511
2512static void i965_irq_preinstall(struct drm_device * dev)
2513{
2514 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2515 int pipe;
2516
2517 atomic_set(&dev_priv->irq_received, 0);
2518
adca4730
CW		 2519 I915_WRITE(PORT_HOTPLUG_EN, 0);
2520 I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
a266c7d5
CW		 2521
2522 I915_WRITE(HWSTAM, 0xeffe);
2523 for_each_pipe(pipe)
2524 I915_WRITE(PIPESTAT(pipe), 0);
2525 I915_WRITE(IMR, 0xffffffff);
2526 I915_WRITE(IER, 0x0);
2527 POSTING_READ(IER);
2528}
2529
2530static int i965_irq_postinstall(struct drm_device *dev)
2531{
2532 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
bbba0a97 2533 u32 enable_mask;
a266c7d5
CW		 2534 u32 error_mask;
2535
a266c7d5 2536 /* Unmask the interrupts that we always want on. */
bbba0a97 2537 dev_priv->irq_mask = ~(I915_ASLE_INTERRUPT |
adca4730 2538 I915_DISPLAY_PORT_INTERRUPT |
bbba0a97
CW		 2539 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
2540 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
2541 I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
2542 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT |
2543 I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT);
2544
2545 enable_mask = ~dev_priv->irq_mask;
2546 enable_mask |= I915_USER_INTERRUPT;
2547
2548 if (IS_G4X(dev))
2549 enable_mask |= I915_BSD_USER_INTERRUPT;
a266c7d5
CW		 2550
2551 dev_priv->pipestat[0] = 0;
2552 dev_priv->pipestat[1] = 0;
515ac2bb 2553 i915_enable_pipestat(dev_priv, 0, PIPE_GMBUS_EVENT_ENABLE);
a266c7d5 2554
a266c7d5
CW		 2555 /*
2556 * Enable some error detection, note the instruction error mask
2557 * bit is reserved, so we leave it masked.
2558 */
2559 if (IS_G4X(dev)) {
2560 error_mask = ~(GM45_ERROR_PAGE_TABLE |
2561 GM45_ERROR_MEM_PRIV |
2562 GM45_ERROR_CP_PRIV |
2563 I915_ERROR_MEMORY_REFRESH);
2564 } else {
2565 error_mask = ~(I915_ERROR_PAGE_TABLE |
2566 I915_ERROR_MEMORY_REFRESH);
2567 }
2568 I915_WRITE(EMR, error_mask);
2569
2570 I915_WRITE(IMR, dev_priv->irq_mask);
2571 I915_WRITE(IER, enable_mask);
2572 POSTING_READ(IER);
2573
20afbda2
DV		 2574 I915_WRITE(PORT_HOTPLUG_EN, 0);
2575 POSTING_READ(PORT_HOTPLUG_EN);
2576
2577 intel_opregion_enable_asle(dev);
2578
2579 return 0;
2580}
2581
2582static void i965_hpd_irq_setup(struct drm_device *dev)
2583{
2584 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2585 u32 hotplug_en;
2586
adca4730
CW		 2587 /* Note HDMI and DP share hotplug bits */
2588 hotplug_en = 0;
2589 if (dev_priv->hotplug_supported_mask & HDMIB_HOTPLUG_INT_STATUS)
2590 hotplug_en |= HDMIB_HOTPLUG_INT_EN;
2591 if (dev_priv->hotplug_supported_mask & HDMIC_HOTPLUG_INT_STATUS)
2592 hotplug_en |= HDMIC_HOTPLUG_INT_EN;
2593 if (dev_priv->hotplug_supported_mask & HDMID_HOTPLUG_INT_STATUS)
2594 hotplug_en |= HDMID_HOTPLUG_INT_EN;
084b612e
CW		 2595 if (IS_G4X(dev)) {
2596 if (dev_priv->hotplug_supported_mask & SDVOC_HOTPLUG_INT_STATUS_G4X)
2597 hotplug_en |= SDVOC_HOTPLUG_INT_EN;
2598 if (dev_priv->hotplug_supported_mask & SDVOB_HOTPLUG_INT_STATUS_G4X)
2599 hotplug_en |= SDVOB_HOTPLUG_INT_EN;
2600 } else {
2601 if (dev_priv->hotplug_supported_mask & SDVOC_HOTPLUG_INT_STATUS_I965)
2602 hotplug_en |= SDVOC_HOTPLUG_INT_EN;
2603 if (dev_priv->hotplug_supported_mask & SDVOB_HOTPLUG_INT_STATUS_I965)
2604 hotplug_en |= SDVOB_HOTPLUG_INT_EN;
2605 }
adca4730
CW		 2606 if (dev_priv->hotplug_supported_mask & CRT_HOTPLUG_INT_STATUS) {
2607 hotplug_en |= CRT_HOTPLUG_INT_EN;
a266c7d5 2608
adca4730
CW		 2609 /* Programming the CRT detection parameters tends
2610 to generate a spurious hotplug event about three
2611 seconds later. So just do it once.
2612 */
2613 if (IS_G4X(dev))
2614 hotplug_en |= CRT_HOTPLUG_ACTIVATION_PERIOD_64;
2615 hotplug_en |= CRT_HOTPLUG_VOLTAGE_COMPARE_50;
2616 }
a266c7d5 2617
adca4730 2618 /* Ignore TV since it's buggy */
a266c7d5 2619
adca4730 2620 I915_WRITE(PORT_HOTPLUG_EN, hotplug_en);
a266c7d5
CW		 2621}
2622
ff1f525e 2623static irqreturn_t i965_irq_handler(int irq, void *arg)
a266c7d5
CW		 2624{
2625 struct drm_device *dev = (struct drm_device *) arg;
2626 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
a266c7d5
CW		 2627 u32 iir, new_iir;
2628 u32 pipe_stats[I915_MAX_PIPES];
a266c7d5
CW		 2629 unsigned long irqflags;
2630 int irq_received;
2631 int ret = IRQ_NONE, pipe;
a266c7d5
CW		 2632
2633 atomic_inc(&dev_priv->irq_received);
2634
2635 iir = I915_READ(IIR);
2636
a266c7d5 2637 for (;;) {
2c8ba29f
CW		 2638 bool blc_event = false;
2639
a266c7d5
CW		 2640 irq_received = iir != 0;
2641
2642 /* Can't rely on pipestat interrupt bit in iir as it might
2643 * have been cleared after the pipestat interrupt was received.
2644 * It doesn't set the bit in iir again, but it still produces
2645 * interrupts (for non-MSI).
2646 */
2647 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
2648 if (iir & I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT)
2649 i915_handle_error(dev, false);
2650
2651 for_each_pipe(pipe) {
2652 int reg = PIPESTAT(pipe);
2653 pipe_stats[pipe] = I915_READ(reg);
2654
2655 /*
2656 * Clear the PIPE*STAT regs before the IIR
2657 */
2658 if (pipe_stats[pipe] & 0x8000ffff) {
2659 if (pipe_stats[pipe] & PIPE_FIFO_UNDERRUN_STATUS)
2660 DRM_DEBUG_DRIVER("pipe %c underrun\n",
2661 pipe_name(pipe));
2662 I915_WRITE(reg, pipe_stats[pipe]);
2663 irq_received = 1;
2664 }
2665 }
2666 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
2667
2668 if (!irq_received)
2669 break;
2670
2671 ret = IRQ_HANDLED;
2672
2673 /* Consume port. Then clear IIR or we'll miss events */
adca4730 2674 if (iir & I915_DISPLAY_PORT_INTERRUPT) {
a266c7d5
CW		 2675 u32 hotplug_status = I915_READ(PORT_HOTPLUG_STAT);
2676
2677 DRM_DEBUG_DRIVER("hotplug event received, stat 0x%08x\n",
2678 hotplug_status);
2679 if (hotplug_status & dev_priv->hotplug_supported_mask)
2680 queue_work(dev_priv->wq,
2681 &dev_priv->hotplug_work);
2682
2683 I915_WRITE(PORT_HOTPLUG_STAT, hotplug_status);
2684 I915_READ(PORT_HOTPLUG_STAT);
2685 }
2686
2687 I915_WRITE(IIR, iir);
2688 new_iir = I915_READ(IIR); /* Flush posted writes */
2689
a266c7d5
CW		 2690 if (iir & I915_USER_INTERRUPT)
2691 notify_ring(dev, &dev_priv->ring[RCS]);
2692 if (iir & I915_BSD_USER_INTERRUPT)
2693 notify_ring(dev, &dev_priv->ring[VCS]);
2694
4f7d1e79 2695 if (iir & I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT)
a266c7d5 2696 intel_prepare_page_flip(dev, 0);
a266c7d5 2697
4f7d1e79 2698 if (iir & I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT)
a266c7d5 2699 intel_prepare_page_flip(dev, 1);
a266c7d5
CW		 2700
2701 for_each_pipe(pipe) {
2c8ba29f 2702 if (pipe_stats[pipe] & PIPE_START_VBLANK_INTERRUPT_STATUS &&
a266c7d5 2703 drm_handle_vblank(dev, pipe)) {
4f7d1e79
CW		 2704 i915_pageflip_stall_check(dev, pipe);
2705 intel_finish_page_flip(dev, pipe);
a266c7d5
CW		 2706 }
2707
2708 if (pipe_stats[pipe] & PIPE_LEGACY_BLC_EVENT_STATUS)
2709 blc_event = true;
2710 }
2711
2712
2713 if (blc_event || (iir & I915_ASLE_INTERRUPT))
2714 intel_opregion_asle_intr(dev);
2715
515ac2bb
DV		 2716 if (pipe_stats[0] & PIPE_GMBUS_INTERRUPT_STATUS)
2717 gmbus_irq_handler(dev);
2718
a266c7d5
CW		 2719 /* With MSI, interrupts are only generated when iir
2720 * transitions from zero to nonzero. If another bit got
2721 * set while we were handling the existing iir bits, then
2722 * we would never get another interrupt.
2723 *
2724 * This is fine on non-MSI as well, as if we hit this path
2725 * we avoid exiting the interrupt handler only to generate
2726 * another one.
2727 *
2728 * Note that for MSI this could cause a stray interrupt report
2729 * if an interrupt landed in the time between writing IIR and
2730 * the posting read. This should be rare enough to never
2731 * trigger the 99% of 100,000 interrupts test for disabling
2732 * stray interrupts.
2733 */
2734 iir = new_iir;
2735 }
2736
d05c617e 2737 i915_update_dri1_breadcrumb(dev);
2c8ba29f 2738
a266c7d5
CW		 2739 return ret;
2740}
2741
2742static void i965_irq_uninstall(struct drm_device * dev)
2743{
2744 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2745 int pipe;
2746
2747 if (!dev_priv)
2748 return;
2749
adca4730
CW		 2750 I915_WRITE(PORT_HOTPLUG_EN, 0);
2751 I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
a266c7d5
CW		 2752
2753 I915_WRITE(HWSTAM, 0xffffffff);
2754 for_each_pipe(pipe)
2755 I915_WRITE(PIPESTAT(pipe), 0);
2756 I915_WRITE(IMR, 0xffffffff);
2757 I915_WRITE(IER, 0x0);
2758
2759 for_each_pipe(pipe)
2760 I915_WRITE(PIPESTAT(pipe),
2761 I915_READ(PIPESTAT(pipe)) & 0x8000ffff);
2762 I915_WRITE(IIR, I915_READ(IIR));
2763}
2764
f71d4af4
JB		 2765void intel_irq_init(struct drm_device *dev)
2766{
8b2e326d
CW		 2767 struct drm_i915_private *dev_priv = dev->dev_private;
2768
2769 INIT_WORK(&dev_priv->hotplug_work, i915_hotplug_work_func);
2770 INIT_WORK(&dev_priv->error_work, i915_error_work_func);
c6a828d3 2771 INIT_WORK(&dev_priv->rps.work, gen6_pm_rps_work);
a4da4fa4 2772 INIT_WORK(&dev_priv->l3_parity.error_work, ivybridge_parity_work);
8b2e326d 2773
61bac78e
DV		 2774 setup_timer(&dev_priv->hangcheck_timer, i915_hangcheck_elapsed,
2775 (unsigned long) dev);
2776
97a19a24 2777 pm_qos_add_request(&dev_priv->pm_qos, PM_QOS_CPU_DMA_LATENCY, PM_QOS_DEFAULT_VALUE);
9ee32fea 2778
f71d4af4
JB		 2779 dev->driver->get_vblank_counter = i915_get_vblank_counter;
2780 dev->max_vblank_count = 0xffffff; /* only 24 bits of frame count */
7d4e146f 2781 if (IS_G4X(dev) || INTEL_INFO(dev)->gen >= 5) {
f71d4af4
JB		 2782 dev->max_vblank_count = 0xffffffff; /* full 32 bit counter */
2783 dev->driver->get_vblank_counter = gm45_get_vblank_counter;
2784 }
2785
c3613de9
KP		 2786 if (drm_core_check_feature(dev, DRIVER_MODESET))
2787 dev->driver->get_vblank_timestamp = i915_get_vblank_timestamp;
2788 else
2789 dev->driver->get_vblank_timestamp = NULL;
f71d4af4
JB		 2790 dev->driver->get_scanout_position = i915_get_crtc_scanoutpos;
2791
7e231dbe
JB		 2792 if (IS_VALLEYVIEW(dev)) {
2793 dev->driver->irq_handler = valleyview_irq_handler;
2794 dev->driver->irq_preinstall = valleyview_irq_preinstall;
2795 dev->driver->irq_postinstall = valleyview_irq_postinstall;
2796 dev->driver->irq_uninstall = valleyview_irq_uninstall;
2797 dev->driver->enable_vblank = valleyview_enable_vblank;
2798 dev->driver->disable_vblank = valleyview_disable_vblank;
20afbda2 2799 dev_priv->display.hpd_irq_setup = valleyview_hpd_irq_setup;
4a06e201 2800 } else if (IS_IVYBRIDGE(dev) || IS_HASWELL(dev)) {
f71d4af4
JB		 2801 /* Share pre & uninstall handlers with ILK/SNB */
2802 dev->driver->irq_handler = ivybridge_irq_handler;
2803 dev->driver->irq_preinstall = ironlake_irq_preinstall;
2804 dev->driver->irq_postinstall = ivybridge_irq_postinstall;
2805 dev->driver->irq_uninstall = ironlake_irq_uninstall;
2806 dev->driver->enable_vblank = ivybridge_enable_vblank;
2807 dev->driver->disable_vblank = ivybridge_disable_vblank;
2808 } else if (HAS_PCH_SPLIT(dev)) {
2809 dev->driver->irq_handler = ironlake_irq_handler;
2810 dev->driver->irq_preinstall = ironlake_irq_preinstall;
2811 dev->driver->irq_postinstall = ironlake_irq_postinstall;
2812 dev->driver->irq_uninstall = ironlake_irq_uninstall;
2813 dev->driver->enable_vblank = ironlake_enable_vblank;
2814 dev->driver->disable_vblank = ironlake_disable_vblank;
2815 } else {
c2798b19
CW		 2816 if (INTEL_INFO(dev)->gen == 2) {
2817 dev->driver->irq_preinstall = i8xx_irq_preinstall;
2818 dev->driver->irq_postinstall = i8xx_irq_postinstall;
2819 dev->driver->irq_handler = i8xx_irq_handler;
2820 dev->driver->irq_uninstall = i8xx_irq_uninstall;
a266c7d5
CW		 2821 } else if (INTEL_INFO(dev)->gen == 3) {
2822 dev->driver->irq_preinstall = i915_irq_preinstall;
2823 dev->driver->irq_postinstall = i915_irq_postinstall;
2824 dev->driver->irq_uninstall = i915_irq_uninstall;
2825 dev->driver->irq_handler = i915_irq_handler;
20afbda2 2826 dev_priv->display.hpd_irq_setup = i915_hpd_irq_setup;
c2798b19 2827 } else {
a266c7d5
CW		 2828 dev->driver->irq_preinstall = i965_irq_preinstall;
2829 dev->driver->irq_postinstall = i965_irq_postinstall;
2830 dev->driver->irq_uninstall = i965_irq_uninstall;
2831 dev->driver->irq_handler = i965_irq_handler;
20afbda2 2832 dev_priv->display.hpd_irq_setup = i965_hpd_irq_setup;
c2798b19 2833 }
f71d4af4
JB		 2834 dev->driver->enable_vblank = i915_enable_vblank;
2835 dev->driver->disable_vblank = i915_disable_vblank;
2836 }
2837}
20afbda2
DV		 2838
2839void intel_hpd_init(struct drm_device *dev)
2840{
2841 struct drm_i915_private *dev_priv = dev->dev_private;
2842
2843 if (dev_priv->display.hpd_irq_setup)
2844 dev_priv->display.hpd_irq_setup(dev);
2845}
Linux kernel - Deliverables
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