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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 | |
63eeaf38 | 29 | #include <linux/sysrq.h> |
1da177e4 LT |
30 | #include "drmP.h" |
31 | #include "drm.h" | |
32 | #include "i915_drm.h" | |
33 | #include "i915_drv.h" | |
1c5d22f7 | 34 | #include "i915_trace.h" |
79e53945 | 35 | #include "intel_drv.h" |
1da177e4 | 36 | |
1da177e4 | 37 | #define MAX_NOPID ((u32)~0) |
1da177e4 | 38 | |
7c463586 KP |
39 | /** |
40 | * Interrupts that are always left unmasked. | |
41 | * | |
42 | * Since pipe events are edge-triggered from the PIPESTAT register to IIR, | |
43 | * we leave them always unmasked in IMR and then control enabling them through | |
44 | * PIPESTAT alone. | |
45 | */ | |
6b95a207 KH |
46 | #define I915_INTERRUPT_ENABLE_FIX \ |
47 | (I915_ASLE_INTERRUPT | \ | |
48 | I915_DISPLAY_PIPE_A_EVENT_INTERRUPT | \ | |
49 | I915_DISPLAY_PIPE_B_EVENT_INTERRUPT | \ | |
50 | I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT | \ | |
51 | I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT | \ | |
52 | I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT) | |
7c463586 KP |
53 | |
54 | /** Interrupts that we mask and unmask at runtime. */ | |
55 | #define I915_INTERRUPT_ENABLE_VAR (I915_USER_INTERRUPT) | |
56 | ||
79e53945 JB |
57 | #define I915_PIPE_VBLANK_STATUS (PIPE_START_VBLANK_INTERRUPT_STATUS |\ |
58 | PIPE_VBLANK_INTERRUPT_STATUS) | |
59 | ||
60 | #define I915_PIPE_VBLANK_ENABLE (PIPE_START_VBLANK_INTERRUPT_ENABLE |\ | |
61 | PIPE_VBLANK_INTERRUPT_ENABLE) | |
62 | ||
63 | #define DRM_I915_VBLANK_PIPE_ALL (DRM_I915_VBLANK_PIPE_A | \ | |
64 | DRM_I915_VBLANK_PIPE_B) | |
65 | ||
036a4a7d | 66 | void |
f2b115e6 | 67 | ironlake_enable_graphics_irq(drm_i915_private_t *dev_priv, u32 mask) |
036a4a7d ZW |
68 | { |
69 | if ((dev_priv->gt_irq_mask_reg & mask) != 0) { | |
70 | dev_priv->gt_irq_mask_reg &= ~mask; | |
71 | I915_WRITE(GTIMR, dev_priv->gt_irq_mask_reg); | |
72 | (void) I915_READ(GTIMR); | |
73 | } | |
74 | } | |
75 | ||
76 | static inline void | |
f2b115e6 | 77 | ironlake_disable_graphics_irq(drm_i915_private_t *dev_priv, u32 mask) |
036a4a7d ZW |
78 | { |
79 | if ((dev_priv->gt_irq_mask_reg & mask) != mask) { | |
80 | dev_priv->gt_irq_mask_reg |= mask; | |
81 | I915_WRITE(GTIMR, dev_priv->gt_irq_mask_reg); | |
82 | (void) I915_READ(GTIMR); | |
83 | } | |
84 | } | |
85 | ||
86 | /* For display hotplug interrupt */ | |
87 | void | |
f2b115e6 | 88 | ironlake_enable_display_irq(drm_i915_private_t *dev_priv, u32 mask) |
036a4a7d ZW |
89 | { |
90 | if ((dev_priv->irq_mask_reg & mask) != 0) { | |
91 | dev_priv->irq_mask_reg &= ~mask; | |
92 | I915_WRITE(DEIMR, dev_priv->irq_mask_reg); | |
93 | (void) I915_READ(DEIMR); | |
94 | } | |
95 | } | |
96 | ||
97 | static inline void | |
f2b115e6 | 98 | ironlake_disable_display_irq(drm_i915_private_t *dev_priv, u32 mask) |
036a4a7d ZW |
99 | { |
100 | if ((dev_priv->irq_mask_reg & mask) != mask) { | |
101 | dev_priv->irq_mask_reg |= mask; | |
102 | I915_WRITE(DEIMR, dev_priv->irq_mask_reg); | |
103 | (void) I915_READ(DEIMR); | |
104 | } | |
105 | } | |
106 | ||
8ee1c3db | 107 | void |
ed4cb414 EA |
108 | i915_enable_irq(drm_i915_private_t *dev_priv, u32 mask) |
109 | { | |
110 | if ((dev_priv->irq_mask_reg & mask) != 0) { | |
111 | dev_priv->irq_mask_reg &= ~mask; | |
112 | I915_WRITE(IMR, dev_priv->irq_mask_reg); | |
113 | (void) I915_READ(IMR); | |
114 | } | |
115 | } | |
116 | ||
117 | static inline void | |
118 | i915_disable_irq(drm_i915_private_t *dev_priv, u32 mask) | |
119 | { | |
120 | if ((dev_priv->irq_mask_reg & mask) != mask) { | |
121 | dev_priv->irq_mask_reg |= mask; | |
122 | I915_WRITE(IMR, dev_priv->irq_mask_reg); | |
123 | (void) I915_READ(IMR); | |
124 | } | |
125 | } | |
126 | ||
7c463586 KP |
127 | static inline u32 |
128 | i915_pipestat(int pipe) | |
129 | { | |
130 | if (pipe == 0) | |
131 | return PIPEASTAT; | |
132 | if (pipe == 1) | |
133 | return PIPEBSTAT; | |
9c84ba4e | 134 | BUG(); |
7c463586 KP |
135 | } |
136 | ||
137 | void | |
138 | i915_enable_pipestat(drm_i915_private_t *dev_priv, int pipe, u32 mask) | |
139 | { | |
140 | if ((dev_priv->pipestat[pipe] & mask) != mask) { | |
141 | u32 reg = i915_pipestat(pipe); | |
142 | ||
143 | dev_priv->pipestat[pipe] |= mask; | |
144 | /* Enable the interrupt, clear any pending status */ | |
145 | I915_WRITE(reg, dev_priv->pipestat[pipe] | (mask >> 16)); | |
146 | (void) I915_READ(reg); | |
147 | } | |
148 | } | |
149 | ||
150 | void | |
151 | i915_disable_pipestat(drm_i915_private_t *dev_priv, int pipe, u32 mask) | |
152 | { | |
153 | if ((dev_priv->pipestat[pipe] & mask) != 0) { | |
154 | u32 reg = i915_pipestat(pipe); | |
155 | ||
156 | dev_priv->pipestat[pipe] &= ~mask; | |
157 | I915_WRITE(reg, dev_priv->pipestat[pipe]); | |
158 | (void) I915_READ(reg); | |
159 | } | |
160 | } | |
161 | ||
01c66889 ZY |
162 | /** |
163 | * intel_enable_asle - enable ASLE interrupt for OpRegion | |
164 | */ | |
165 | void intel_enable_asle (struct drm_device *dev) | |
166 | { | |
167 | drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; | |
168 | ||
f2b115e6 AJ |
169 | if (IS_IRONLAKE(dev)) |
170 | ironlake_enable_display_irq(dev_priv, DE_GSE); | |
01c66889 ZY |
171 | else |
172 | i915_enable_pipestat(dev_priv, 1, | |
173 | I915_LEGACY_BLC_EVENT_ENABLE); | |
174 | } | |
175 | ||
0a3e67a4 JB |
176 | /** |
177 | * i915_pipe_enabled - check if a pipe is enabled | |
178 | * @dev: DRM device | |
179 | * @pipe: pipe to check | |
180 | * | |
181 | * Reading certain registers when the pipe is disabled can hang the chip. | |
182 | * Use this routine to make sure the PLL is running and the pipe is active | |
183 | * before reading such registers if unsure. | |
184 | */ | |
185 | static int | |
186 | i915_pipe_enabled(struct drm_device *dev, int pipe) | |
187 | { | |
188 | drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; | |
189 | unsigned long pipeconf = pipe ? PIPEBCONF : PIPEACONF; | |
190 | ||
191 | if (I915_READ(pipeconf) & PIPEACONF_ENABLE) | |
192 | return 1; | |
193 | ||
194 | return 0; | |
195 | } | |
196 | ||
42f52ef8 KP |
197 | /* Called from drm generic code, passed a 'crtc', which |
198 | * we use as a pipe index | |
199 | */ | |
200 | u32 i915_get_vblank_counter(struct drm_device *dev, int pipe) | |
0a3e67a4 JB |
201 | { |
202 | drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; | |
203 | unsigned long high_frame; | |
204 | unsigned long low_frame; | |
205 | u32 high1, high2, low, count; | |
0a3e67a4 | 206 | |
0a3e67a4 JB |
207 | high_frame = pipe ? PIPEBFRAMEHIGH : PIPEAFRAMEHIGH; |
208 | low_frame = pipe ? PIPEBFRAMEPIXEL : PIPEAFRAMEPIXEL; | |
209 | ||
210 | if (!i915_pipe_enabled(dev, pipe)) { | |
44d98a61 ZY |
211 | DRM_DEBUG_DRIVER("trying to get vblank count for disabled " |
212 | "pipe %d\n", pipe); | |
0a3e67a4 JB |
213 | return 0; |
214 | } | |
215 | ||
216 | /* | |
217 | * High & low register fields aren't synchronized, so make sure | |
218 | * we get a low value that's stable across two reads of the high | |
219 | * register. | |
220 | */ | |
221 | do { | |
222 | high1 = ((I915_READ(high_frame) & PIPE_FRAME_HIGH_MASK) >> | |
223 | PIPE_FRAME_HIGH_SHIFT); | |
224 | low = ((I915_READ(low_frame) & PIPE_FRAME_LOW_MASK) >> | |
225 | PIPE_FRAME_LOW_SHIFT); | |
226 | high2 = ((I915_READ(high_frame) & PIPE_FRAME_HIGH_MASK) >> | |
227 | PIPE_FRAME_HIGH_SHIFT); | |
228 | } while (high1 != high2); | |
229 | ||
230 | count = (high1 << 8) | low; | |
231 | ||
232 | return count; | |
233 | } | |
234 | ||
9880b7a5 JB |
235 | u32 gm45_get_vblank_counter(struct drm_device *dev, int pipe) |
236 | { | |
237 | drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; | |
238 | int reg = pipe ? PIPEB_FRMCOUNT_GM45 : PIPEA_FRMCOUNT_GM45; | |
239 | ||
240 | if (!i915_pipe_enabled(dev, pipe)) { | |
44d98a61 ZY |
241 | DRM_DEBUG_DRIVER("trying to get vblank count for disabled " |
242 | "pipe %d\n", pipe); | |
9880b7a5 JB |
243 | return 0; |
244 | } | |
245 | ||
246 | return I915_READ(reg); | |
247 | } | |
248 | ||
5ca58282 JB |
249 | /* |
250 | * Handle hotplug events outside the interrupt handler proper. | |
251 | */ | |
252 | static void i915_hotplug_work_func(struct work_struct *work) | |
253 | { | |
254 | drm_i915_private_t *dev_priv = container_of(work, drm_i915_private_t, | |
255 | hotplug_work); | |
256 | struct drm_device *dev = dev_priv->dev; | |
c31c4ba3 KP |
257 | struct drm_mode_config *mode_config = &dev->mode_config; |
258 | struct drm_connector *connector; | |
259 | ||
260 | if (mode_config->num_connector) { | |
261 | list_for_each_entry(connector, &mode_config->connector_list, head) { | |
262 | struct intel_output *intel_output = to_intel_output(connector); | |
263 | ||
264 | if (intel_output->hot_plug) | |
265 | (*intel_output->hot_plug) (intel_output); | |
266 | } | |
267 | } | |
5ca58282 JB |
268 | /* Just fire off a uevent and let userspace tell us what to do */ |
269 | drm_sysfs_hotplug_event(dev); | |
270 | } | |
271 | ||
f97108d1 JB |
272 | static void i915_handle_rps_change(struct drm_device *dev) |
273 | { | |
274 | drm_i915_private_t *dev_priv = dev->dev_private; | |
275 | u32 slow_up, slow_down, max_avg, min_avg; | |
276 | u16 rgvswctl; | |
277 | u8 new_delay = dev_priv->cur_delay; | |
278 | ||
279 | I915_WRITE(MEMINTRSTS, I915_READ(MEMINTRSTS) & ~MEMINT_EVAL_CHG); | |
280 | slow_up = I915_READ(RCPREVBSYTUPAVG); | |
281 | slow_down = I915_READ(RCPREVBSYTDNAVG); | |
282 | max_avg = I915_READ(RCBMAXAVG); | |
283 | min_avg = I915_READ(RCBMINAVG); | |
284 | ||
285 | /* Handle RCS change request from hw */ | |
286 | if (slow_up > max_avg) { | |
287 | if (dev_priv->cur_delay != dev_priv->max_delay) | |
288 | new_delay = dev_priv->cur_delay - 1; | |
289 | if (new_delay < dev_priv->max_delay) | |
290 | new_delay = dev_priv->max_delay; | |
291 | } else if (slow_down < min_avg) { | |
292 | if (dev_priv->cur_delay != dev_priv->min_delay) | |
293 | new_delay = dev_priv->cur_delay + 1; | |
294 | if (new_delay > dev_priv->min_delay) | |
295 | new_delay = dev_priv->min_delay; | |
296 | } | |
297 | ||
298 | DRM_DEBUG("rps change requested: %d -> %d\n", | |
299 | dev_priv->cur_delay, new_delay); | |
300 | ||
301 | rgvswctl = I915_READ(MEMSWCTL); | |
302 | if (rgvswctl & MEMCTL_CMD_STS) { | |
303 | DRM_ERROR("gpu slow, RCS change rejected\n"); | |
304 | return; /* still slow with another command */ | |
305 | } | |
306 | ||
307 | /* Program the new state */ | |
308 | rgvswctl = (MEMCTL_CMD_CHFREQ << MEMCTL_CMD_SHIFT) | | |
309 | (new_delay << MEMCTL_FREQ_SHIFT) | MEMCTL_SFCAVM; | |
310 | I915_WRITE(MEMSWCTL, rgvswctl); | |
311 | POSTING_READ(MEMSWCTL); | |
312 | ||
313 | rgvswctl |= MEMCTL_CMD_STS; | |
314 | I915_WRITE(MEMSWCTL, rgvswctl); | |
315 | ||
316 | dev_priv->cur_delay = new_delay; | |
317 | ||
318 | DRM_DEBUG("rps changed\n"); | |
319 | ||
320 | return; | |
321 | } | |
322 | ||
f2b115e6 | 323 | irqreturn_t ironlake_irq_handler(struct drm_device *dev) |
036a4a7d ZW |
324 | { |
325 | drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; | |
326 | int ret = IRQ_NONE; | |
3ff99164 | 327 | u32 de_iir, gt_iir, de_ier, pch_iir; |
036a4a7d ZW |
328 | struct drm_i915_master_private *master_priv; |
329 | ||
2d109a84 ZN |
330 | /* disable master interrupt before clearing iir */ |
331 | de_ier = I915_READ(DEIER); | |
332 | I915_WRITE(DEIER, de_ier & ~DE_MASTER_IRQ_CONTROL); | |
333 | (void)I915_READ(DEIER); | |
334 | ||
036a4a7d ZW |
335 | de_iir = I915_READ(DEIIR); |
336 | gt_iir = I915_READ(GTIIR); | |
c650156a | 337 | pch_iir = I915_READ(SDEIIR); |
036a4a7d | 338 | |
c7c85101 ZN |
339 | if (de_iir == 0 && gt_iir == 0 && pch_iir == 0) |
340 | goto done; | |
036a4a7d | 341 | |
c7c85101 | 342 | ret = IRQ_HANDLED; |
036a4a7d | 343 | |
c7c85101 ZN |
344 | if (dev->primary->master) { |
345 | master_priv = dev->primary->master->driver_priv; | |
346 | if (master_priv->sarea_priv) | |
347 | master_priv->sarea_priv->last_dispatch = | |
348 | READ_BREADCRUMB(dev_priv); | |
349 | } | |
036a4a7d | 350 | |
c7c85101 ZN |
351 | if (gt_iir & GT_USER_INTERRUPT) { |
352 | u32 seqno = i915_get_gem_seqno(dev); | |
353 | dev_priv->mm.irq_gem_seqno = seqno; | |
354 | trace_i915_gem_request_complete(dev, seqno); | |
355 | DRM_WAKEUP(&dev_priv->irq_queue); | |
356 | dev_priv->hangcheck_count = 0; | |
357 | mod_timer(&dev_priv->hangcheck_timer, jiffies + DRM_I915_HANGCHECK_PERIOD); | |
358 | } | |
01c66889 | 359 | |
c7c85101 ZN |
360 | if (de_iir & DE_GSE) |
361 | ironlake_opregion_gse_intr(dev); | |
c650156a | 362 | |
f072d2e7 | 363 | if (de_iir & DE_PLANEA_FLIP_DONE) { |
013d5aa2 | 364 | intel_prepare_page_flip(dev, 0); |
f072d2e7 ZW |
365 | intel_finish_page_flip(dev, 0); |
366 | } | |
013d5aa2 | 367 | |
f072d2e7 | 368 | if (de_iir & DE_PLANEB_FLIP_DONE) { |
013d5aa2 | 369 | intel_prepare_page_flip(dev, 1); |
f072d2e7 ZW |
370 | intel_finish_page_flip(dev, 1); |
371 | } | |
013d5aa2 | 372 | |
f072d2e7 | 373 | if (de_iir & DE_PIPEA_VBLANK) |
c062df61 LP |
374 | drm_handle_vblank(dev, 0); |
375 | ||
f072d2e7 | 376 | if (de_iir & DE_PIPEB_VBLANK) |
c062df61 LP |
377 | drm_handle_vblank(dev, 1); |
378 | ||
c7c85101 ZN |
379 | /* check event from PCH */ |
380 | if ((de_iir & DE_PCH_EVENT) && | |
381 | (pch_iir & SDE_HOTPLUG_MASK)) { | |
382 | queue_work(dev_priv->wq, &dev_priv->hotplug_work); | |
036a4a7d ZW |
383 | } |
384 | ||
f97108d1 JB |
385 | if (de_iir & DE_PCU_EVENT) { |
386 | I915_WRITE(MEMINTRSTS, I915_READ(MEMINTRSTS)); | |
387 | i915_handle_rps_change(dev); | |
388 | } | |
389 | ||
c7c85101 ZN |
390 | /* should clear PCH hotplug event before clear CPU irq */ |
391 | I915_WRITE(SDEIIR, pch_iir); | |
392 | I915_WRITE(GTIIR, gt_iir); | |
393 | I915_WRITE(DEIIR, de_iir); | |
394 | ||
395 | done: | |
2d109a84 ZN |
396 | I915_WRITE(DEIER, de_ier); |
397 | (void)I915_READ(DEIER); | |
398 | ||
036a4a7d ZW |
399 | return ret; |
400 | } | |
401 | ||
8a905236 JB |
402 | /** |
403 | * i915_error_work_func - do process context error handling work | |
404 | * @work: work struct | |
405 | * | |
406 | * Fire an error uevent so userspace can see that a hang or error | |
407 | * was detected. | |
408 | */ | |
409 | static void i915_error_work_func(struct work_struct *work) | |
410 | { | |
411 | drm_i915_private_t *dev_priv = container_of(work, drm_i915_private_t, | |
412 | error_work); | |
413 | struct drm_device *dev = dev_priv->dev; | |
f316a42c BG |
414 | char *error_event[] = { "ERROR=1", NULL }; |
415 | char *reset_event[] = { "RESET=1", NULL }; | |
416 | char *reset_done_event[] = { "ERROR=0", NULL }; | |
8a905236 | 417 | |
44d98a61 | 418 | DRM_DEBUG_DRIVER("generating error event\n"); |
f316a42c BG |
419 | kobject_uevent_env(&dev->primary->kdev.kobj, KOBJ_CHANGE, error_event); |
420 | ||
ba1234d1 | 421 | if (atomic_read(&dev_priv->mm.wedged)) { |
f316a42c | 422 | if (IS_I965G(dev)) { |
44d98a61 | 423 | DRM_DEBUG_DRIVER("resetting chip\n"); |
f316a42c BG |
424 | kobject_uevent_env(&dev->primary->kdev.kobj, KOBJ_CHANGE, reset_event); |
425 | if (!i965_reset(dev, GDRST_RENDER)) { | |
ba1234d1 | 426 | atomic_set(&dev_priv->mm.wedged, 0); |
f316a42c BG |
427 | kobject_uevent_env(&dev->primary->kdev.kobj, KOBJ_CHANGE, reset_done_event); |
428 | } | |
429 | } else { | |
44d98a61 | 430 | DRM_DEBUG_DRIVER("reboot required\n"); |
f316a42c BG |
431 | } |
432 | } | |
8a905236 JB |
433 | } |
434 | ||
435 | /** | |
436 | * i915_capture_error_state - capture an error record for later analysis | |
437 | * @dev: drm device | |
438 | * | |
439 | * Should be called when an error is detected (either a hang or an error | |
440 | * interrupt) to capture error state from the time of the error. Fills | |
441 | * out a structure which becomes available in debugfs for user level tools | |
442 | * to pick up. | |
443 | */ | |
63eeaf38 JB |
444 | static void i915_capture_error_state(struct drm_device *dev) |
445 | { | |
446 | struct drm_i915_private *dev_priv = dev->dev_private; | |
447 | struct drm_i915_error_state *error; | |
448 | unsigned long flags; | |
449 | ||
450 | spin_lock_irqsave(&dev_priv->error_lock, flags); | |
451 | if (dev_priv->first_error) | |
452 | goto out; | |
453 | ||
454 | error = kmalloc(sizeof(*error), GFP_ATOMIC); | |
455 | if (!error) { | |
44d98a61 | 456 | DRM_DEBUG_DRIVER("out ot memory, not capturing error state\n"); |
63eeaf38 JB |
457 | goto out; |
458 | } | |
459 | ||
460 | error->eir = I915_READ(EIR); | |
461 | error->pgtbl_er = I915_READ(PGTBL_ER); | |
462 | error->pipeastat = I915_READ(PIPEASTAT); | |
463 | error->pipebstat = I915_READ(PIPEBSTAT); | |
464 | error->instpm = I915_READ(INSTPM); | |
465 | if (!IS_I965G(dev)) { | |
466 | error->ipeir = I915_READ(IPEIR); | |
467 | error->ipehr = I915_READ(IPEHR); | |
468 | error->instdone = I915_READ(INSTDONE); | |
469 | error->acthd = I915_READ(ACTHD); | |
470 | } else { | |
471 | error->ipeir = I915_READ(IPEIR_I965); | |
472 | error->ipehr = I915_READ(IPEHR_I965); | |
473 | error->instdone = I915_READ(INSTDONE_I965); | |
474 | error->instps = I915_READ(INSTPS); | |
475 | error->instdone1 = I915_READ(INSTDONE1); | |
476 | error->acthd = I915_READ(ACTHD_I965); | |
477 | } | |
478 | ||
8a905236 JB |
479 | do_gettimeofday(&error->time); |
480 | ||
63eeaf38 JB |
481 | dev_priv->first_error = error; |
482 | ||
483 | out: | |
484 | spin_unlock_irqrestore(&dev_priv->error_lock, flags); | |
485 | } | |
486 | ||
8a905236 JB |
487 | /** |
488 | * i915_handle_error - handle an error interrupt | |
489 | * @dev: drm device | |
490 | * | |
491 | * Do some basic checking of regsiter state at error interrupt time and | |
492 | * dump it to the syslog. Also call i915_capture_error_state() to make | |
493 | * sure we get a record and make it available in debugfs. Fire a uevent | |
494 | * so userspace knows something bad happened (should trigger collection | |
495 | * of a ring dump etc.). | |
496 | */ | |
ba1234d1 | 497 | static void i915_handle_error(struct drm_device *dev, bool wedged) |
8a905236 JB |
498 | { |
499 | struct drm_i915_private *dev_priv = dev->dev_private; | |
500 | u32 eir = I915_READ(EIR); | |
501 | u32 pipea_stats = I915_READ(PIPEASTAT); | |
502 | u32 pipeb_stats = I915_READ(PIPEBSTAT); | |
503 | ||
504 | i915_capture_error_state(dev); | |
505 | ||
506 | printk(KERN_ERR "render error detected, EIR: 0x%08x\n", | |
507 | eir); | |
508 | ||
509 | if (IS_G4X(dev)) { | |
510 | if (eir & (GM45_ERROR_MEM_PRIV | GM45_ERROR_CP_PRIV)) { | |
511 | u32 ipeir = I915_READ(IPEIR_I965); | |
512 | ||
513 | printk(KERN_ERR " IPEIR: 0x%08x\n", | |
514 | I915_READ(IPEIR_I965)); | |
515 | printk(KERN_ERR " IPEHR: 0x%08x\n", | |
516 | I915_READ(IPEHR_I965)); | |
517 | printk(KERN_ERR " INSTDONE: 0x%08x\n", | |
518 | I915_READ(INSTDONE_I965)); | |
519 | printk(KERN_ERR " INSTPS: 0x%08x\n", | |
520 | I915_READ(INSTPS)); | |
521 | printk(KERN_ERR " INSTDONE1: 0x%08x\n", | |
522 | I915_READ(INSTDONE1)); | |
523 | printk(KERN_ERR " ACTHD: 0x%08x\n", | |
524 | I915_READ(ACTHD_I965)); | |
525 | I915_WRITE(IPEIR_I965, ipeir); | |
526 | (void)I915_READ(IPEIR_I965); | |
527 | } | |
528 | if (eir & GM45_ERROR_PAGE_TABLE) { | |
529 | u32 pgtbl_err = I915_READ(PGTBL_ER); | |
530 | printk(KERN_ERR "page table error\n"); | |
531 | printk(KERN_ERR " PGTBL_ER: 0x%08x\n", | |
532 | pgtbl_err); | |
533 | I915_WRITE(PGTBL_ER, pgtbl_err); | |
534 | (void)I915_READ(PGTBL_ER); | |
535 | } | |
536 | } | |
537 | ||
538 | if (IS_I9XX(dev)) { | |
539 | if (eir & I915_ERROR_PAGE_TABLE) { | |
540 | u32 pgtbl_err = I915_READ(PGTBL_ER); | |
541 | printk(KERN_ERR "page table error\n"); | |
542 | printk(KERN_ERR " PGTBL_ER: 0x%08x\n", | |
543 | pgtbl_err); | |
544 | I915_WRITE(PGTBL_ER, pgtbl_err); | |
545 | (void)I915_READ(PGTBL_ER); | |
546 | } | |
547 | } | |
548 | ||
549 | if (eir & I915_ERROR_MEMORY_REFRESH) { | |
550 | printk(KERN_ERR "memory refresh error\n"); | |
551 | printk(KERN_ERR "PIPEASTAT: 0x%08x\n", | |
552 | pipea_stats); | |
553 | printk(KERN_ERR "PIPEBSTAT: 0x%08x\n", | |
554 | pipeb_stats); | |
555 | /* pipestat has already been acked */ | |
556 | } | |
557 | if (eir & I915_ERROR_INSTRUCTION) { | |
558 | printk(KERN_ERR "instruction error\n"); | |
559 | printk(KERN_ERR " INSTPM: 0x%08x\n", | |
560 | I915_READ(INSTPM)); | |
561 | if (!IS_I965G(dev)) { | |
562 | u32 ipeir = I915_READ(IPEIR); | |
563 | ||
564 | printk(KERN_ERR " IPEIR: 0x%08x\n", | |
565 | I915_READ(IPEIR)); | |
566 | printk(KERN_ERR " IPEHR: 0x%08x\n", | |
567 | I915_READ(IPEHR)); | |
568 | printk(KERN_ERR " INSTDONE: 0x%08x\n", | |
569 | I915_READ(INSTDONE)); | |
570 | printk(KERN_ERR " ACTHD: 0x%08x\n", | |
571 | I915_READ(ACTHD)); | |
572 | I915_WRITE(IPEIR, ipeir); | |
573 | (void)I915_READ(IPEIR); | |
574 | } else { | |
575 | u32 ipeir = I915_READ(IPEIR_I965); | |
576 | ||
577 | printk(KERN_ERR " IPEIR: 0x%08x\n", | |
578 | I915_READ(IPEIR_I965)); | |
579 | printk(KERN_ERR " IPEHR: 0x%08x\n", | |
580 | I915_READ(IPEHR_I965)); | |
581 | printk(KERN_ERR " INSTDONE: 0x%08x\n", | |
582 | I915_READ(INSTDONE_I965)); | |
583 | printk(KERN_ERR " INSTPS: 0x%08x\n", | |
584 | I915_READ(INSTPS)); | |
585 | printk(KERN_ERR " INSTDONE1: 0x%08x\n", | |
586 | I915_READ(INSTDONE1)); | |
587 | printk(KERN_ERR " ACTHD: 0x%08x\n", | |
588 | I915_READ(ACTHD_I965)); | |
589 | I915_WRITE(IPEIR_I965, ipeir); | |
590 | (void)I915_READ(IPEIR_I965); | |
591 | } | |
592 | } | |
593 | ||
594 | I915_WRITE(EIR, eir); | |
595 | (void)I915_READ(EIR); | |
596 | eir = I915_READ(EIR); | |
597 | if (eir) { | |
598 | /* | |
599 | * some errors might have become stuck, | |
600 | * mask them. | |
601 | */ | |
602 | DRM_ERROR("EIR stuck: 0x%08x, masking\n", eir); | |
603 | I915_WRITE(EMR, I915_READ(EMR) | eir); | |
604 | I915_WRITE(IIR, I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT); | |
605 | } | |
606 | ||
ba1234d1 BG |
607 | if (wedged) { |
608 | atomic_set(&dev_priv->mm.wedged, 1); | |
609 | ||
11ed50ec BG |
610 | /* |
611 | * Wakeup waiting processes so they don't hang | |
612 | */ | |
11ed50ec BG |
613 | DRM_WAKEUP(&dev_priv->irq_queue); |
614 | } | |
615 | ||
9c9fe1f8 | 616 | queue_work(dev_priv->wq, &dev_priv->error_work); |
8a905236 JB |
617 | } |
618 | ||
1da177e4 LT |
619 | irqreturn_t i915_driver_irq_handler(DRM_IRQ_ARGS) |
620 | { | |
84b1fd10 | 621 | struct drm_device *dev = (struct drm_device *) arg; |
1da177e4 | 622 | drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; |
7c1c2871 | 623 | struct drm_i915_master_private *master_priv; |
cdfbc41f EA |
624 | u32 iir, new_iir; |
625 | u32 pipea_stats, pipeb_stats; | |
05eff845 KP |
626 | u32 vblank_status; |
627 | u32 vblank_enable; | |
0a3e67a4 | 628 | int vblank = 0; |
7c463586 | 629 | unsigned long irqflags; |
05eff845 KP |
630 | int irq_received; |
631 | int ret = IRQ_NONE; | |
6e5fca53 | 632 | |
630681d9 EA |
633 | atomic_inc(&dev_priv->irq_received); |
634 | ||
f2b115e6 AJ |
635 | if (IS_IRONLAKE(dev)) |
636 | return ironlake_irq_handler(dev); | |
036a4a7d | 637 | |
ed4cb414 | 638 | iir = I915_READ(IIR); |
a6b54f3f | 639 | |
05eff845 KP |
640 | if (IS_I965G(dev)) { |
641 | vblank_status = I915_START_VBLANK_INTERRUPT_STATUS; | |
642 | vblank_enable = PIPE_START_VBLANK_INTERRUPT_ENABLE; | |
643 | } else { | |
644 | vblank_status = I915_VBLANK_INTERRUPT_STATUS; | |
645 | vblank_enable = I915_VBLANK_INTERRUPT_ENABLE; | |
646 | } | |
af6061af | 647 | |
05eff845 KP |
648 | for (;;) { |
649 | irq_received = iir != 0; | |
650 | ||
651 | /* Can't rely on pipestat interrupt bit in iir as it might | |
652 | * have been cleared after the pipestat interrupt was received. | |
653 | * It doesn't set the bit in iir again, but it still produces | |
654 | * interrupts (for non-MSI). | |
655 | */ | |
656 | spin_lock_irqsave(&dev_priv->user_irq_lock, irqflags); | |
657 | pipea_stats = I915_READ(PIPEASTAT); | |
658 | pipeb_stats = I915_READ(PIPEBSTAT); | |
79e53945 | 659 | |
8a905236 | 660 | if (iir & I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT) |
ba1234d1 | 661 | i915_handle_error(dev, false); |
8a905236 | 662 | |
cdfbc41f EA |
663 | /* |
664 | * Clear the PIPE(A|B)STAT regs before the IIR | |
665 | */ | |
05eff845 | 666 | if (pipea_stats & 0x8000ffff) { |
7662c8bd | 667 | if (pipea_stats & PIPE_FIFO_UNDERRUN_STATUS) |
44d98a61 | 668 | DRM_DEBUG_DRIVER("pipe a underrun\n"); |
cdfbc41f | 669 | I915_WRITE(PIPEASTAT, pipea_stats); |
05eff845 | 670 | irq_received = 1; |
cdfbc41f | 671 | } |
1da177e4 | 672 | |
05eff845 | 673 | if (pipeb_stats & 0x8000ffff) { |
7662c8bd | 674 | if (pipeb_stats & PIPE_FIFO_UNDERRUN_STATUS) |
44d98a61 | 675 | DRM_DEBUG_DRIVER("pipe b underrun\n"); |
cdfbc41f | 676 | I915_WRITE(PIPEBSTAT, pipeb_stats); |
05eff845 | 677 | irq_received = 1; |
cdfbc41f | 678 | } |
05eff845 KP |
679 | spin_unlock_irqrestore(&dev_priv->user_irq_lock, irqflags); |
680 | ||
681 | if (!irq_received) | |
682 | break; | |
683 | ||
684 | ret = IRQ_HANDLED; | |
8ee1c3db | 685 | |
5ca58282 JB |
686 | /* Consume port. Then clear IIR or we'll miss events */ |
687 | if ((I915_HAS_HOTPLUG(dev)) && | |
688 | (iir & I915_DISPLAY_PORT_INTERRUPT)) { | |
689 | u32 hotplug_status = I915_READ(PORT_HOTPLUG_STAT); | |
690 | ||
44d98a61 | 691 | DRM_DEBUG_DRIVER("hotplug event received, stat 0x%08x\n", |
5ca58282 JB |
692 | hotplug_status); |
693 | if (hotplug_status & dev_priv->hotplug_supported_mask) | |
9c9fe1f8 EA |
694 | queue_work(dev_priv->wq, |
695 | &dev_priv->hotplug_work); | |
5ca58282 JB |
696 | |
697 | I915_WRITE(PORT_HOTPLUG_STAT, hotplug_status); | |
698 | I915_READ(PORT_HOTPLUG_STAT); | |
699 | } | |
700 | ||
cdfbc41f EA |
701 | I915_WRITE(IIR, iir); |
702 | new_iir = I915_READ(IIR); /* Flush posted writes */ | |
7c463586 | 703 | |
7c1c2871 DA |
704 | if (dev->primary->master) { |
705 | master_priv = dev->primary->master->driver_priv; | |
706 | if (master_priv->sarea_priv) | |
707 | master_priv->sarea_priv->last_dispatch = | |
708 | READ_BREADCRUMB(dev_priv); | |
709 | } | |
0a3e67a4 | 710 | |
cdfbc41f | 711 | if (iir & I915_USER_INTERRUPT) { |
1c5d22f7 CW |
712 | u32 seqno = i915_get_gem_seqno(dev); |
713 | dev_priv->mm.irq_gem_seqno = seqno; | |
714 | trace_i915_gem_request_complete(dev, seqno); | |
cdfbc41f | 715 | DRM_WAKEUP(&dev_priv->irq_queue); |
f65d9421 BG |
716 | dev_priv->hangcheck_count = 0; |
717 | mod_timer(&dev_priv->hangcheck_timer, jiffies + DRM_I915_HANGCHECK_PERIOD); | |
cdfbc41f | 718 | } |
673a394b | 719 | |
6b95a207 KH |
720 | if (iir & I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT) |
721 | intel_prepare_page_flip(dev, 0); | |
722 | ||
723 | if (iir & I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT) | |
724 | intel_prepare_page_flip(dev, 1); | |
725 | ||
05eff845 | 726 | if (pipea_stats & vblank_status) { |
cdfbc41f EA |
727 | vblank++; |
728 | drm_handle_vblank(dev, 0); | |
6b95a207 | 729 | intel_finish_page_flip(dev, 0); |
cdfbc41f | 730 | } |
7c463586 | 731 | |
05eff845 | 732 | if (pipeb_stats & vblank_status) { |
cdfbc41f EA |
733 | vblank++; |
734 | drm_handle_vblank(dev, 1); | |
6b95a207 | 735 | intel_finish_page_flip(dev, 1); |
cdfbc41f | 736 | } |
7c463586 | 737 | |
cdfbc41f EA |
738 | if ((pipeb_stats & I915_LEGACY_BLC_EVENT_STATUS) || |
739 | (iir & I915_ASLE_INTERRUPT)) | |
740 | opregion_asle_intr(dev); | |
741 | ||
742 | /* With MSI, interrupts are only generated when iir | |
743 | * transitions from zero to nonzero. If another bit got | |
744 | * set while we were handling the existing iir bits, then | |
745 | * we would never get another interrupt. | |
746 | * | |
747 | * This is fine on non-MSI as well, as if we hit this path | |
748 | * we avoid exiting the interrupt handler only to generate | |
749 | * another one. | |
750 | * | |
751 | * Note that for MSI this could cause a stray interrupt report | |
752 | * if an interrupt landed in the time between writing IIR and | |
753 | * the posting read. This should be rare enough to never | |
754 | * trigger the 99% of 100,000 interrupts test for disabling | |
755 | * stray interrupts. | |
756 | */ | |
757 | iir = new_iir; | |
05eff845 | 758 | } |
0a3e67a4 | 759 | |
05eff845 | 760 | return ret; |
1da177e4 LT |
761 | } |
762 | ||
af6061af | 763 | static int i915_emit_irq(struct drm_device * dev) |
1da177e4 LT |
764 | { |
765 | drm_i915_private_t *dev_priv = dev->dev_private; | |
7c1c2871 | 766 | struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv; |
1da177e4 LT |
767 | RING_LOCALS; |
768 | ||
769 | i915_kernel_lost_context(dev); | |
770 | ||
44d98a61 | 771 | DRM_DEBUG_DRIVER("\n"); |
1da177e4 | 772 | |
c99b058f | 773 | dev_priv->counter++; |
c29b669c | 774 | if (dev_priv->counter > 0x7FFFFFFFUL) |
c99b058f | 775 | dev_priv->counter = 1; |
7c1c2871 DA |
776 | if (master_priv->sarea_priv) |
777 | master_priv->sarea_priv->last_enqueue = dev_priv->counter; | |
c29b669c | 778 | |
0baf823a | 779 | BEGIN_LP_RING(4); |
585fb111 | 780 | OUT_RING(MI_STORE_DWORD_INDEX); |
0baf823a | 781 | OUT_RING(I915_BREADCRUMB_INDEX << MI_STORE_DWORD_INDEX_SHIFT); |
c29b669c | 782 | OUT_RING(dev_priv->counter); |
585fb111 | 783 | OUT_RING(MI_USER_INTERRUPT); |
1da177e4 | 784 | ADVANCE_LP_RING(); |
bc5f4523 | 785 | |
c29b669c | 786 | return dev_priv->counter; |
1da177e4 LT |
787 | } |
788 | ||
673a394b | 789 | void i915_user_irq_get(struct drm_device *dev) |
ed4cb414 EA |
790 | { |
791 | drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; | |
e9d21d7f | 792 | unsigned long irqflags; |
ed4cb414 | 793 | |
e9d21d7f | 794 | spin_lock_irqsave(&dev_priv->user_irq_lock, irqflags); |
036a4a7d | 795 | if (dev->irq_enabled && (++dev_priv->user_irq_refcount == 1)) { |
f2b115e6 AJ |
796 | if (IS_IRONLAKE(dev)) |
797 | ironlake_enable_graphics_irq(dev_priv, GT_USER_INTERRUPT); | |
036a4a7d ZW |
798 | else |
799 | i915_enable_irq(dev_priv, I915_USER_INTERRUPT); | |
800 | } | |
e9d21d7f | 801 | spin_unlock_irqrestore(&dev_priv->user_irq_lock, irqflags); |
ed4cb414 EA |
802 | } |
803 | ||
0a3e67a4 | 804 | void i915_user_irq_put(struct drm_device *dev) |
ed4cb414 EA |
805 | { |
806 | drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; | |
e9d21d7f | 807 | unsigned long irqflags; |
ed4cb414 | 808 | |
e9d21d7f | 809 | spin_lock_irqsave(&dev_priv->user_irq_lock, irqflags); |
ed4cb414 | 810 | BUG_ON(dev->irq_enabled && dev_priv->user_irq_refcount <= 0); |
036a4a7d | 811 | if (dev->irq_enabled && (--dev_priv->user_irq_refcount == 0)) { |
f2b115e6 AJ |
812 | if (IS_IRONLAKE(dev)) |
813 | ironlake_disable_graphics_irq(dev_priv, GT_USER_INTERRUPT); | |
036a4a7d ZW |
814 | else |
815 | i915_disable_irq(dev_priv, I915_USER_INTERRUPT); | |
816 | } | |
e9d21d7f | 817 | spin_unlock_irqrestore(&dev_priv->user_irq_lock, irqflags); |
ed4cb414 EA |
818 | } |
819 | ||
9d34e5db CW |
820 | void i915_trace_irq_get(struct drm_device *dev, u32 seqno) |
821 | { | |
822 | drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; | |
823 | ||
824 | if (dev_priv->trace_irq_seqno == 0) | |
825 | i915_user_irq_get(dev); | |
826 | ||
827 | dev_priv->trace_irq_seqno = seqno; | |
828 | } | |
829 | ||
84b1fd10 | 830 | static int i915_wait_irq(struct drm_device * dev, int irq_nr) |
1da177e4 LT |
831 | { |
832 | drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; | |
7c1c2871 | 833 | struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv; |
1da177e4 LT |
834 | int ret = 0; |
835 | ||
44d98a61 | 836 | DRM_DEBUG_DRIVER("irq_nr=%d breadcrumb=%d\n", irq_nr, |
1da177e4 LT |
837 | READ_BREADCRUMB(dev_priv)); |
838 | ||
ed4cb414 | 839 | if (READ_BREADCRUMB(dev_priv) >= irq_nr) { |
7c1c2871 DA |
840 | if (master_priv->sarea_priv) |
841 | master_priv->sarea_priv->last_dispatch = READ_BREADCRUMB(dev_priv); | |
1da177e4 | 842 | return 0; |
ed4cb414 | 843 | } |
1da177e4 | 844 | |
7c1c2871 DA |
845 | if (master_priv->sarea_priv) |
846 | master_priv->sarea_priv->perf_boxes |= I915_BOX_WAIT; | |
1da177e4 | 847 | |
ed4cb414 | 848 | i915_user_irq_get(dev); |
1da177e4 LT |
849 | DRM_WAIT_ON(ret, dev_priv->irq_queue, 3 * DRM_HZ, |
850 | READ_BREADCRUMB(dev_priv) >= irq_nr); | |
ed4cb414 | 851 | i915_user_irq_put(dev); |
1da177e4 | 852 | |
20caafa6 | 853 | if (ret == -EBUSY) { |
3e684eae | 854 | DRM_ERROR("EBUSY -- rec: %d emitted: %d\n", |
1da177e4 LT |
855 | READ_BREADCRUMB(dev_priv), (int)dev_priv->counter); |
856 | } | |
857 | ||
af6061af DA |
858 | return ret; |
859 | } | |
860 | ||
1da177e4 LT |
861 | /* Needs the lock as it touches the ring. |
862 | */ | |
c153f45f EA |
863 | int i915_irq_emit(struct drm_device *dev, void *data, |
864 | struct drm_file *file_priv) | |
1da177e4 | 865 | { |
1da177e4 | 866 | drm_i915_private_t *dev_priv = dev->dev_private; |
c153f45f | 867 | drm_i915_irq_emit_t *emit = data; |
1da177e4 LT |
868 | int result; |
869 | ||
07f4f8bf | 870 | if (!dev_priv || !dev_priv->ring.virtual_start) { |
3e684eae | 871 | DRM_ERROR("called with no initialization\n"); |
20caafa6 | 872 | return -EINVAL; |
1da177e4 | 873 | } |
299eb93c EA |
874 | |
875 | RING_LOCK_TEST_WITH_RETURN(dev, file_priv); | |
876 | ||
546b0974 | 877 | mutex_lock(&dev->struct_mutex); |
1da177e4 | 878 | result = i915_emit_irq(dev); |
546b0974 | 879 | mutex_unlock(&dev->struct_mutex); |
1da177e4 | 880 | |
c153f45f | 881 | if (DRM_COPY_TO_USER(emit->irq_seq, &result, sizeof(int))) { |
1da177e4 | 882 | DRM_ERROR("copy_to_user\n"); |
20caafa6 | 883 | return -EFAULT; |
1da177e4 LT |
884 | } |
885 | ||
886 | return 0; | |
887 | } | |
888 | ||
889 | /* Doesn't need the hardware lock. | |
890 | */ | |
c153f45f EA |
891 | int i915_irq_wait(struct drm_device *dev, void *data, |
892 | struct drm_file *file_priv) | |
1da177e4 | 893 | { |
1da177e4 | 894 | drm_i915_private_t *dev_priv = dev->dev_private; |
c153f45f | 895 | drm_i915_irq_wait_t *irqwait = data; |
1da177e4 LT |
896 | |
897 | if (!dev_priv) { | |
3e684eae | 898 | DRM_ERROR("called with no initialization\n"); |
20caafa6 | 899 | return -EINVAL; |
1da177e4 LT |
900 | } |
901 | ||
c153f45f | 902 | return i915_wait_irq(dev, irqwait->irq_seq); |
1da177e4 LT |
903 | } |
904 | ||
42f52ef8 KP |
905 | /* Called from drm generic code, passed 'crtc' which |
906 | * we use as a pipe index | |
907 | */ | |
908 | int i915_enable_vblank(struct drm_device *dev, int pipe) | |
0a3e67a4 JB |
909 | { |
910 | drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; | |
e9d21d7f | 911 | unsigned long irqflags; |
71e0ffa5 JB |
912 | int pipeconf_reg = (pipe == 0) ? PIPEACONF : PIPEBCONF; |
913 | u32 pipeconf; | |
914 | ||
915 | pipeconf = I915_READ(pipeconf_reg); | |
916 | if (!(pipeconf & PIPEACONF_ENABLE)) | |
917 | return -EINVAL; | |
0a3e67a4 | 918 | |
e9d21d7f | 919 | spin_lock_irqsave(&dev_priv->user_irq_lock, irqflags); |
c062df61 LP |
920 | if (IS_IRONLAKE(dev)) |
921 | ironlake_enable_display_irq(dev_priv, (pipe == 0) ? | |
922 | DE_PIPEA_VBLANK: DE_PIPEB_VBLANK); | |
923 | else if (IS_I965G(dev)) | |
7c463586 KP |
924 | i915_enable_pipestat(dev_priv, pipe, |
925 | PIPE_START_VBLANK_INTERRUPT_ENABLE); | |
e9d21d7f | 926 | else |
7c463586 KP |
927 | i915_enable_pipestat(dev_priv, pipe, |
928 | PIPE_VBLANK_INTERRUPT_ENABLE); | |
e9d21d7f | 929 | spin_unlock_irqrestore(&dev_priv->user_irq_lock, irqflags); |
0a3e67a4 JB |
930 | return 0; |
931 | } | |
932 | ||
42f52ef8 KP |
933 | /* Called from drm generic code, passed 'crtc' which |
934 | * we use as a pipe index | |
935 | */ | |
936 | void i915_disable_vblank(struct drm_device *dev, int pipe) | |
0a3e67a4 JB |
937 | { |
938 | drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; | |
e9d21d7f | 939 | unsigned long irqflags; |
0a3e67a4 | 940 | |
e9d21d7f | 941 | spin_lock_irqsave(&dev_priv->user_irq_lock, irqflags); |
c062df61 LP |
942 | if (IS_IRONLAKE(dev)) |
943 | ironlake_disable_display_irq(dev_priv, (pipe == 0) ? | |
944 | DE_PIPEA_VBLANK: DE_PIPEB_VBLANK); | |
945 | else | |
946 | i915_disable_pipestat(dev_priv, pipe, | |
947 | PIPE_VBLANK_INTERRUPT_ENABLE | | |
948 | PIPE_START_VBLANK_INTERRUPT_ENABLE); | |
e9d21d7f | 949 | spin_unlock_irqrestore(&dev_priv->user_irq_lock, irqflags); |
0a3e67a4 JB |
950 | } |
951 | ||
79e53945 JB |
952 | void i915_enable_interrupt (struct drm_device *dev) |
953 | { | |
954 | struct drm_i915_private *dev_priv = dev->dev_private; | |
e170b030 | 955 | |
f2b115e6 | 956 | if (!IS_IRONLAKE(dev)) |
e170b030 | 957 | opregion_enable_asle(dev); |
79e53945 JB |
958 | dev_priv->irq_enabled = 1; |
959 | } | |
960 | ||
961 | ||
702880f2 DA |
962 | /* Set the vblank monitor pipe |
963 | */ | |
c153f45f EA |
964 | int i915_vblank_pipe_set(struct drm_device *dev, void *data, |
965 | struct drm_file *file_priv) | |
702880f2 | 966 | { |
702880f2 | 967 | drm_i915_private_t *dev_priv = dev->dev_private; |
702880f2 DA |
968 | |
969 | if (!dev_priv) { | |
3e684eae | 970 | DRM_ERROR("called with no initialization\n"); |
20caafa6 | 971 | return -EINVAL; |
702880f2 DA |
972 | } |
973 | ||
5b51694a | 974 | return 0; |
702880f2 DA |
975 | } |
976 | ||
c153f45f EA |
977 | int i915_vblank_pipe_get(struct drm_device *dev, void *data, |
978 | struct drm_file *file_priv) | |
702880f2 | 979 | { |
702880f2 | 980 | drm_i915_private_t *dev_priv = dev->dev_private; |
c153f45f | 981 | drm_i915_vblank_pipe_t *pipe = data; |
702880f2 DA |
982 | |
983 | if (!dev_priv) { | |
3e684eae | 984 | DRM_ERROR("called with no initialization\n"); |
20caafa6 | 985 | return -EINVAL; |
702880f2 DA |
986 | } |
987 | ||
0a3e67a4 | 988 | pipe->pipe = DRM_I915_VBLANK_PIPE_A | DRM_I915_VBLANK_PIPE_B; |
c153f45f | 989 | |
702880f2 DA |
990 | return 0; |
991 | } | |
992 | ||
a6b54f3f MD |
993 | /** |
994 | * Schedule buffer swap at given vertical blank. | |
995 | */ | |
c153f45f EA |
996 | int i915_vblank_swap(struct drm_device *dev, void *data, |
997 | struct drm_file *file_priv) | |
a6b54f3f | 998 | { |
bd95e0a4 EA |
999 | /* The delayed swap mechanism was fundamentally racy, and has been |
1000 | * removed. The model was that the client requested a delayed flip/swap | |
1001 | * from the kernel, then waited for vblank before continuing to perform | |
1002 | * rendering. The problem was that the kernel might wake the client | |
1003 | * up before it dispatched the vblank swap (since the lock has to be | |
1004 | * held while touching the ringbuffer), in which case the client would | |
1005 | * clear and start the next frame before the swap occurred, and | |
1006 | * flicker would occur in addition to likely missing the vblank. | |
1007 | * | |
1008 | * In the absence of this ioctl, userland falls back to a correct path | |
1009 | * of waiting for a vblank, then dispatching the swap on its own. | |
1010 | * Context switching to userland and back is plenty fast enough for | |
1011 | * meeting the requirements of vblank swapping. | |
0a3e67a4 | 1012 | */ |
bd95e0a4 | 1013 | return -EINVAL; |
a6b54f3f MD |
1014 | } |
1015 | ||
f65d9421 BG |
1016 | struct drm_i915_gem_request *i915_get_tail_request(struct drm_device *dev) { |
1017 | drm_i915_private_t *dev_priv = dev->dev_private; | |
1018 | return list_entry(dev_priv->mm.request_list.prev, struct drm_i915_gem_request, list); | |
1019 | } | |
1020 | ||
1021 | /** | |
1022 | * This is called when the chip hasn't reported back with completed | |
1023 | * batchbuffers in a long time. The first time this is called we simply record | |
1024 | * ACTHD. If ACTHD hasn't changed by the time the hangcheck timer elapses | |
1025 | * again, we assume the chip is wedged and try to fix it. | |
1026 | */ | |
1027 | void i915_hangcheck_elapsed(unsigned long data) | |
1028 | { | |
1029 | struct drm_device *dev = (struct drm_device *)data; | |
1030 | drm_i915_private_t *dev_priv = dev->dev_private; | |
1031 | uint32_t acthd; | |
1032 | ||
1033 | if (!IS_I965G(dev)) | |
1034 | acthd = I915_READ(ACTHD); | |
1035 | else | |
1036 | acthd = I915_READ(ACTHD_I965); | |
1037 | ||
1038 | /* If all work is done then ACTHD clearly hasn't advanced. */ | |
1039 | if (list_empty(&dev_priv->mm.request_list) || | |
1040 | i915_seqno_passed(i915_get_gem_seqno(dev), i915_get_tail_request(dev)->seqno)) { | |
1041 | dev_priv->hangcheck_count = 0; | |
1042 | return; | |
1043 | } | |
1044 | ||
1045 | if (dev_priv->last_acthd == acthd && dev_priv->hangcheck_count > 0) { | |
1046 | DRM_ERROR("Hangcheck timer elapsed... GPU hung\n"); | |
ba1234d1 | 1047 | i915_handle_error(dev, true); |
f65d9421 BG |
1048 | return; |
1049 | } | |
1050 | ||
1051 | /* Reset timer case chip hangs without another request being added */ | |
1052 | mod_timer(&dev_priv->hangcheck_timer, jiffies + DRM_I915_HANGCHECK_PERIOD); | |
1053 | ||
1054 | if (acthd != dev_priv->last_acthd) | |
1055 | dev_priv->hangcheck_count = 0; | |
1056 | else | |
1057 | dev_priv->hangcheck_count++; | |
1058 | ||
1059 | dev_priv->last_acthd = acthd; | |
1060 | } | |
1061 | ||
1da177e4 LT |
1062 | /* drm_dma.h hooks |
1063 | */ | |
f2b115e6 | 1064 | static void ironlake_irq_preinstall(struct drm_device *dev) |
036a4a7d ZW |
1065 | { |
1066 | drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; | |
1067 | ||
1068 | I915_WRITE(HWSTAM, 0xeffe); | |
1069 | ||
1070 | /* XXX hotplug from PCH */ | |
1071 | ||
1072 | I915_WRITE(DEIMR, 0xffffffff); | |
1073 | I915_WRITE(DEIER, 0x0); | |
1074 | (void) I915_READ(DEIER); | |
1075 | ||
1076 | /* and GT */ | |
1077 | I915_WRITE(GTIMR, 0xffffffff); | |
1078 | I915_WRITE(GTIER, 0x0); | |
1079 | (void) I915_READ(GTIER); | |
c650156a ZW |
1080 | |
1081 | /* south display irq */ | |
1082 | I915_WRITE(SDEIMR, 0xffffffff); | |
1083 | I915_WRITE(SDEIER, 0x0); | |
1084 | (void) I915_READ(SDEIER); | |
036a4a7d ZW |
1085 | } |
1086 | ||
f2b115e6 | 1087 | static int ironlake_irq_postinstall(struct drm_device *dev) |
036a4a7d ZW |
1088 | { |
1089 | drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; | |
1090 | /* enable kind of interrupts always enabled */ | |
013d5aa2 JB |
1091 | u32 display_mask = DE_MASTER_IRQ_CONTROL | DE_GSE | DE_PCH_EVENT | |
1092 | DE_PLANEA_FLIP_DONE | DE_PLANEB_FLIP_DONE; | |
036a4a7d | 1093 | u32 render_mask = GT_USER_INTERRUPT; |
c650156a ZW |
1094 | u32 hotplug_mask = SDE_CRT_HOTPLUG | SDE_PORTB_HOTPLUG | |
1095 | SDE_PORTC_HOTPLUG | SDE_PORTD_HOTPLUG; | |
036a4a7d ZW |
1096 | |
1097 | dev_priv->irq_mask_reg = ~display_mask; | |
643ced9b | 1098 | dev_priv->de_irq_enable_reg = display_mask | DE_PIPEA_VBLANK | DE_PIPEB_VBLANK; |
036a4a7d ZW |
1099 | |
1100 | /* should always can generate irq */ | |
1101 | I915_WRITE(DEIIR, I915_READ(DEIIR)); | |
1102 | I915_WRITE(DEIMR, dev_priv->irq_mask_reg); | |
1103 | I915_WRITE(DEIER, dev_priv->de_irq_enable_reg); | |
1104 | (void) I915_READ(DEIER); | |
1105 | ||
1106 | /* user interrupt should be enabled, but masked initial */ | |
1107 | dev_priv->gt_irq_mask_reg = 0xffffffff; | |
1108 | dev_priv->gt_irq_enable_reg = render_mask; | |
1109 | ||
1110 | I915_WRITE(GTIIR, I915_READ(GTIIR)); | |
1111 | I915_WRITE(GTIMR, dev_priv->gt_irq_mask_reg); | |
1112 | I915_WRITE(GTIER, dev_priv->gt_irq_enable_reg); | |
1113 | (void) I915_READ(GTIER); | |
1114 | ||
c650156a ZW |
1115 | dev_priv->pch_irq_mask_reg = ~hotplug_mask; |
1116 | dev_priv->pch_irq_enable_reg = hotplug_mask; | |
1117 | ||
1118 | I915_WRITE(SDEIIR, I915_READ(SDEIIR)); | |
1119 | I915_WRITE(SDEIMR, dev_priv->pch_irq_mask_reg); | |
1120 | I915_WRITE(SDEIER, dev_priv->pch_irq_enable_reg); | |
1121 | (void) I915_READ(SDEIER); | |
1122 | ||
f97108d1 JB |
1123 | if (IS_IRONLAKE_M(dev)) { |
1124 | /* Clear & enable PCU event interrupts */ | |
1125 | I915_WRITE(DEIIR, DE_PCU_EVENT); | |
1126 | I915_WRITE(DEIER, I915_READ(DEIER) | DE_PCU_EVENT); | |
1127 | ironlake_enable_display_irq(dev_priv, DE_PCU_EVENT); | |
1128 | } | |
1129 | ||
036a4a7d ZW |
1130 | return 0; |
1131 | } | |
1132 | ||
84b1fd10 | 1133 | void i915_driver_irq_preinstall(struct drm_device * dev) |
1da177e4 LT |
1134 | { |
1135 | drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; | |
1136 | ||
79e53945 JB |
1137 | atomic_set(&dev_priv->irq_received, 0); |
1138 | ||
036a4a7d | 1139 | INIT_WORK(&dev_priv->hotplug_work, i915_hotplug_work_func); |
8a905236 | 1140 | INIT_WORK(&dev_priv->error_work, i915_error_work_func); |
036a4a7d | 1141 | |
f2b115e6 AJ |
1142 | if (IS_IRONLAKE(dev)) { |
1143 | ironlake_irq_preinstall(dev); | |
036a4a7d ZW |
1144 | return; |
1145 | } | |
1146 | ||
5ca58282 JB |
1147 | if (I915_HAS_HOTPLUG(dev)) { |
1148 | I915_WRITE(PORT_HOTPLUG_EN, 0); | |
1149 | I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT)); | |
1150 | } | |
1151 | ||
0a3e67a4 | 1152 | I915_WRITE(HWSTAM, 0xeffe); |
7c463586 KP |
1153 | I915_WRITE(PIPEASTAT, 0); |
1154 | I915_WRITE(PIPEBSTAT, 0); | |
0a3e67a4 | 1155 | I915_WRITE(IMR, 0xffffffff); |
ed4cb414 | 1156 | I915_WRITE(IER, 0x0); |
7c463586 | 1157 | (void) I915_READ(IER); |
1da177e4 LT |
1158 | } |
1159 | ||
b01f2c3a JB |
1160 | /* |
1161 | * Must be called after intel_modeset_init or hotplug interrupts won't be | |
1162 | * enabled correctly. | |
1163 | */ | |
0a3e67a4 | 1164 | int i915_driver_irq_postinstall(struct drm_device *dev) |
1da177e4 LT |
1165 | { |
1166 | drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; | |
5ca58282 | 1167 | u32 enable_mask = I915_INTERRUPT_ENABLE_FIX | I915_INTERRUPT_ENABLE_VAR; |
63eeaf38 | 1168 | u32 error_mask; |
0a3e67a4 | 1169 | |
036a4a7d ZW |
1170 | DRM_INIT_WAITQUEUE(&dev_priv->irq_queue); |
1171 | ||
0a3e67a4 | 1172 | dev_priv->vblank_pipe = DRM_I915_VBLANK_PIPE_A | DRM_I915_VBLANK_PIPE_B; |
0a3e67a4 | 1173 | |
f2b115e6 AJ |
1174 | if (IS_IRONLAKE(dev)) |
1175 | return ironlake_irq_postinstall(dev); | |
036a4a7d | 1176 | |
7c463586 KP |
1177 | /* Unmask the interrupts that we always want on. */ |
1178 | dev_priv->irq_mask_reg = ~I915_INTERRUPT_ENABLE_FIX; | |
1179 | ||
1180 | dev_priv->pipestat[0] = 0; | |
1181 | dev_priv->pipestat[1] = 0; | |
1182 | ||
5ca58282 JB |
1183 | if (I915_HAS_HOTPLUG(dev)) { |
1184 | u32 hotplug_en = I915_READ(PORT_HOTPLUG_EN); | |
1185 | ||
b01f2c3a JB |
1186 | /* Note HDMI and DP share bits */ |
1187 | if (dev_priv->hotplug_supported_mask & HDMIB_HOTPLUG_INT_STATUS) | |
1188 | hotplug_en |= HDMIB_HOTPLUG_INT_EN; | |
1189 | if (dev_priv->hotplug_supported_mask & HDMIC_HOTPLUG_INT_STATUS) | |
1190 | hotplug_en |= HDMIC_HOTPLUG_INT_EN; | |
1191 | if (dev_priv->hotplug_supported_mask & HDMID_HOTPLUG_INT_STATUS) | |
1192 | hotplug_en |= HDMID_HOTPLUG_INT_EN; | |
1193 | if (dev_priv->hotplug_supported_mask & SDVOC_HOTPLUG_INT_STATUS) | |
1194 | hotplug_en |= SDVOC_HOTPLUG_INT_EN; | |
1195 | if (dev_priv->hotplug_supported_mask & SDVOB_HOTPLUG_INT_STATUS) | |
1196 | hotplug_en |= SDVOB_HOTPLUG_INT_EN; | |
1197 | if (dev_priv->hotplug_supported_mask & CRT_HOTPLUG_INT_STATUS) | |
1198 | hotplug_en |= CRT_HOTPLUG_INT_EN; | |
1199 | /* Ignore TV since it's buggy */ | |
1200 | ||
5ca58282 JB |
1201 | I915_WRITE(PORT_HOTPLUG_EN, hotplug_en); |
1202 | ||
5ca58282 JB |
1203 | /* Enable in IER... */ |
1204 | enable_mask |= I915_DISPLAY_PORT_INTERRUPT; | |
1205 | /* and unmask in IMR */ | |
1206 | i915_enable_irq(dev_priv, I915_DISPLAY_PORT_INTERRUPT); | |
1207 | } | |
1208 | ||
63eeaf38 JB |
1209 | /* |
1210 | * Enable some error detection, note the instruction error mask | |
1211 | * bit is reserved, so we leave it masked. | |
1212 | */ | |
1213 | if (IS_G4X(dev)) { | |
1214 | error_mask = ~(GM45_ERROR_PAGE_TABLE | | |
1215 | GM45_ERROR_MEM_PRIV | | |
1216 | GM45_ERROR_CP_PRIV | | |
1217 | I915_ERROR_MEMORY_REFRESH); | |
1218 | } else { | |
1219 | error_mask = ~(I915_ERROR_PAGE_TABLE | | |
1220 | I915_ERROR_MEMORY_REFRESH); | |
1221 | } | |
1222 | I915_WRITE(EMR, error_mask); | |
1223 | ||
7c463586 KP |
1224 | /* Disable pipe interrupt enables, clear pending pipe status */ |
1225 | I915_WRITE(PIPEASTAT, I915_READ(PIPEASTAT) & 0x8000ffff); | |
1226 | I915_WRITE(PIPEBSTAT, I915_READ(PIPEBSTAT) & 0x8000ffff); | |
1227 | /* Clear pending interrupt status */ | |
1228 | I915_WRITE(IIR, I915_READ(IIR)); | |
8ee1c3db | 1229 | |
5ca58282 | 1230 | I915_WRITE(IER, enable_mask); |
7c463586 | 1231 | I915_WRITE(IMR, dev_priv->irq_mask_reg); |
ed4cb414 EA |
1232 | (void) I915_READ(IER); |
1233 | ||
8ee1c3db | 1234 | opregion_enable_asle(dev); |
0a3e67a4 JB |
1235 | |
1236 | return 0; | |
1da177e4 LT |
1237 | } |
1238 | ||
f2b115e6 | 1239 | static void ironlake_irq_uninstall(struct drm_device *dev) |
036a4a7d ZW |
1240 | { |
1241 | drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; | |
1242 | I915_WRITE(HWSTAM, 0xffffffff); | |
1243 | ||
1244 | I915_WRITE(DEIMR, 0xffffffff); | |
1245 | I915_WRITE(DEIER, 0x0); | |
1246 | I915_WRITE(DEIIR, I915_READ(DEIIR)); | |
1247 | ||
1248 | I915_WRITE(GTIMR, 0xffffffff); | |
1249 | I915_WRITE(GTIER, 0x0); | |
1250 | I915_WRITE(GTIIR, I915_READ(GTIIR)); | |
1251 | } | |
1252 | ||
84b1fd10 | 1253 | void i915_driver_irq_uninstall(struct drm_device * dev) |
1da177e4 LT |
1254 | { |
1255 | drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; | |
91e3738e | 1256 | |
1da177e4 LT |
1257 | if (!dev_priv) |
1258 | return; | |
1259 | ||
0a3e67a4 JB |
1260 | dev_priv->vblank_pipe = 0; |
1261 | ||
f2b115e6 AJ |
1262 | if (IS_IRONLAKE(dev)) { |
1263 | ironlake_irq_uninstall(dev); | |
036a4a7d ZW |
1264 | return; |
1265 | } | |
1266 | ||
5ca58282 JB |
1267 | if (I915_HAS_HOTPLUG(dev)) { |
1268 | I915_WRITE(PORT_HOTPLUG_EN, 0); | |
1269 | I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT)); | |
1270 | } | |
1271 | ||
0a3e67a4 | 1272 | I915_WRITE(HWSTAM, 0xffffffff); |
7c463586 KP |
1273 | I915_WRITE(PIPEASTAT, 0); |
1274 | I915_WRITE(PIPEBSTAT, 0); | |
0a3e67a4 | 1275 | I915_WRITE(IMR, 0xffffffff); |
ed4cb414 | 1276 | I915_WRITE(IER, 0x0); |
af6061af | 1277 | |
7c463586 KP |
1278 | I915_WRITE(PIPEASTAT, I915_READ(PIPEASTAT) & 0x8000ffff); |
1279 | I915_WRITE(PIPEBSTAT, I915_READ(PIPEBSTAT) & 0x8000ffff); | |
1280 | I915_WRITE(IIR, I915_READ(IIR)); | |
1da177e4 | 1281 | } |