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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" | |
79e53945 | 34 | #include "intel_drv.h" |
1da177e4 | 35 | |
1da177e4 | 36 | #define MAX_NOPID ((u32)~0) |
1da177e4 | 37 | |
7c463586 KP |
38 | /** |
39 | * Interrupts that are always left unmasked. | |
40 | * | |
41 | * Since pipe events are edge-triggered from the PIPESTAT register to IIR, | |
42 | * we leave them always unmasked in IMR and then control enabling them through | |
43 | * PIPESTAT alone. | |
44 | */ | |
63eeaf38 JB |
45 | #define I915_INTERRUPT_ENABLE_FIX (I915_ASLE_INTERRUPT | \ |
46 | I915_DISPLAY_PIPE_A_EVENT_INTERRUPT | \ | |
47 | I915_DISPLAY_PIPE_B_EVENT_INTERRUPT | \ | |
48 | I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT) | |
7c463586 KP |
49 | |
50 | /** Interrupts that we mask and unmask at runtime. */ | |
51 | #define I915_INTERRUPT_ENABLE_VAR (I915_USER_INTERRUPT) | |
52 | ||
79e53945 JB |
53 | #define I915_PIPE_VBLANK_STATUS (PIPE_START_VBLANK_INTERRUPT_STATUS |\ |
54 | PIPE_VBLANK_INTERRUPT_STATUS) | |
55 | ||
56 | #define I915_PIPE_VBLANK_ENABLE (PIPE_START_VBLANK_INTERRUPT_ENABLE |\ | |
57 | PIPE_VBLANK_INTERRUPT_ENABLE) | |
58 | ||
59 | #define DRM_I915_VBLANK_PIPE_ALL (DRM_I915_VBLANK_PIPE_A | \ | |
60 | DRM_I915_VBLANK_PIPE_B) | |
61 | ||
036a4a7d ZW |
62 | void |
63 | igdng_enable_graphics_irq(drm_i915_private_t *dev_priv, u32 mask) | |
64 | { | |
65 | if ((dev_priv->gt_irq_mask_reg & mask) != 0) { | |
66 | dev_priv->gt_irq_mask_reg &= ~mask; | |
67 | I915_WRITE(GTIMR, dev_priv->gt_irq_mask_reg); | |
68 | (void) I915_READ(GTIMR); | |
69 | } | |
70 | } | |
71 | ||
72 | static inline void | |
73 | igdng_disable_graphics_irq(drm_i915_private_t *dev_priv, u32 mask) | |
74 | { | |
75 | if ((dev_priv->gt_irq_mask_reg & mask) != mask) { | |
76 | dev_priv->gt_irq_mask_reg |= mask; | |
77 | I915_WRITE(GTIMR, dev_priv->gt_irq_mask_reg); | |
78 | (void) I915_READ(GTIMR); | |
79 | } | |
80 | } | |
81 | ||
82 | /* For display hotplug interrupt */ | |
83 | void | |
84 | igdng_enable_display_irq(drm_i915_private_t *dev_priv, u32 mask) | |
85 | { | |
86 | if ((dev_priv->irq_mask_reg & mask) != 0) { | |
87 | dev_priv->irq_mask_reg &= ~mask; | |
88 | I915_WRITE(DEIMR, dev_priv->irq_mask_reg); | |
89 | (void) I915_READ(DEIMR); | |
90 | } | |
91 | } | |
92 | ||
93 | static inline void | |
94 | igdng_disable_display_irq(drm_i915_private_t *dev_priv, u32 mask) | |
95 | { | |
96 | if ((dev_priv->irq_mask_reg & mask) != mask) { | |
97 | dev_priv->irq_mask_reg |= mask; | |
98 | I915_WRITE(DEIMR, dev_priv->irq_mask_reg); | |
99 | (void) I915_READ(DEIMR); | |
100 | } | |
101 | } | |
102 | ||
8ee1c3db | 103 | void |
ed4cb414 EA |
104 | i915_enable_irq(drm_i915_private_t *dev_priv, u32 mask) |
105 | { | |
106 | if ((dev_priv->irq_mask_reg & mask) != 0) { | |
107 | dev_priv->irq_mask_reg &= ~mask; | |
108 | I915_WRITE(IMR, dev_priv->irq_mask_reg); | |
109 | (void) I915_READ(IMR); | |
110 | } | |
111 | } | |
112 | ||
113 | static inline void | |
114 | i915_disable_irq(drm_i915_private_t *dev_priv, u32 mask) | |
115 | { | |
116 | if ((dev_priv->irq_mask_reg & mask) != mask) { | |
117 | dev_priv->irq_mask_reg |= mask; | |
118 | I915_WRITE(IMR, dev_priv->irq_mask_reg); | |
119 | (void) I915_READ(IMR); | |
120 | } | |
121 | } | |
122 | ||
7c463586 KP |
123 | static inline u32 |
124 | i915_pipestat(int pipe) | |
125 | { | |
126 | if (pipe == 0) | |
127 | return PIPEASTAT; | |
128 | if (pipe == 1) | |
129 | return PIPEBSTAT; | |
9c84ba4e | 130 | BUG(); |
7c463586 KP |
131 | } |
132 | ||
133 | void | |
134 | i915_enable_pipestat(drm_i915_private_t *dev_priv, int pipe, u32 mask) | |
135 | { | |
136 | if ((dev_priv->pipestat[pipe] & mask) != mask) { | |
137 | u32 reg = i915_pipestat(pipe); | |
138 | ||
139 | dev_priv->pipestat[pipe] |= mask; | |
140 | /* Enable the interrupt, clear any pending status */ | |
141 | I915_WRITE(reg, dev_priv->pipestat[pipe] | (mask >> 16)); | |
142 | (void) I915_READ(reg); | |
143 | } | |
144 | } | |
145 | ||
146 | void | |
147 | i915_disable_pipestat(drm_i915_private_t *dev_priv, int pipe, u32 mask) | |
148 | { | |
149 | if ((dev_priv->pipestat[pipe] & mask) != 0) { | |
150 | u32 reg = i915_pipestat(pipe); | |
151 | ||
152 | dev_priv->pipestat[pipe] &= ~mask; | |
153 | I915_WRITE(reg, dev_priv->pipestat[pipe]); | |
154 | (void) I915_READ(reg); | |
155 | } | |
156 | } | |
157 | ||
0a3e67a4 JB |
158 | /** |
159 | * i915_pipe_enabled - check if a pipe is enabled | |
160 | * @dev: DRM device | |
161 | * @pipe: pipe to check | |
162 | * | |
163 | * Reading certain registers when the pipe is disabled can hang the chip. | |
164 | * Use this routine to make sure the PLL is running and the pipe is active | |
165 | * before reading such registers if unsure. | |
166 | */ | |
167 | static int | |
168 | i915_pipe_enabled(struct drm_device *dev, int pipe) | |
169 | { | |
170 | drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; | |
171 | unsigned long pipeconf = pipe ? PIPEBCONF : PIPEACONF; | |
172 | ||
173 | if (I915_READ(pipeconf) & PIPEACONF_ENABLE) | |
174 | return 1; | |
175 | ||
176 | return 0; | |
177 | } | |
178 | ||
42f52ef8 KP |
179 | /* Called from drm generic code, passed a 'crtc', which |
180 | * we use as a pipe index | |
181 | */ | |
182 | u32 i915_get_vblank_counter(struct drm_device *dev, int pipe) | |
0a3e67a4 JB |
183 | { |
184 | drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; | |
185 | unsigned long high_frame; | |
186 | unsigned long low_frame; | |
187 | u32 high1, high2, low, count; | |
0a3e67a4 | 188 | |
0a3e67a4 JB |
189 | high_frame = pipe ? PIPEBFRAMEHIGH : PIPEAFRAMEHIGH; |
190 | low_frame = pipe ? PIPEBFRAMEPIXEL : PIPEAFRAMEPIXEL; | |
191 | ||
192 | if (!i915_pipe_enabled(dev, pipe)) { | |
6cb504c2 | 193 | DRM_DEBUG("trying to get vblank count for disabled pipe %d\n", pipe); |
0a3e67a4 JB |
194 | return 0; |
195 | } | |
196 | ||
197 | /* | |
198 | * High & low register fields aren't synchronized, so make sure | |
199 | * we get a low value that's stable across two reads of the high | |
200 | * register. | |
201 | */ | |
202 | do { | |
203 | high1 = ((I915_READ(high_frame) & PIPE_FRAME_HIGH_MASK) >> | |
204 | PIPE_FRAME_HIGH_SHIFT); | |
205 | low = ((I915_READ(low_frame) & PIPE_FRAME_LOW_MASK) >> | |
206 | PIPE_FRAME_LOW_SHIFT); | |
207 | high2 = ((I915_READ(high_frame) & PIPE_FRAME_HIGH_MASK) >> | |
208 | PIPE_FRAME_HIGH_SHIFT); | |
209 | } while (high1 != high2); | |
210 | ||
211 | count = (high1 << 8) | low; | |
212 | ||
213 | return count; | |
214 | } | |
215 | ||
9880b7a5 JB |
216 | u32 gm45_get_vblank_counter(struct drm_device *dev, int pipe) |
217 | { | |
218 | drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; | |
219 | int reg = pipe ? PIPEB_FRMCOUNT_GM45 : PIPEA_FRMCOUNT_GM45; | |
220 | ||
221 | if (!i915_pipe_enabled(dev, pipe)) { | |
6cb504c2 | 222 | DRM_DEBUG("trying to get vblank count for disabled pipe %d\n", pipe); |
9880b7a5 JB |
223 | return 0; |
224 | } | |
225 | ||
226 | return I915_READ(reg); | |
227 | } | |
228 | ||
5ca58282 JB |
229 | /* |
230 | * Handle hotplug events outside the interrupt handler proper. | |
231 | */ | |
232 | static void i915_hotplug_work_func(struct work_struct *work) | |
233 | { | |
234 | drm_i915_private_t *dev_priv = container_of(work, drm_i915_private_t, | |
235 | hotplug_work); | |
236 | struct drm_device *dev = dev_priv->dev; | |
c31c4ba3 KP |
237 | struct drm_mode_config *mode_config = &dev->mode_config; |
238 | struct drm_connector *connector; | |
239 | ||
240 | if (mode_config->num_connector) { | |
241 | list_for_each_entry(connector, &mode_config->connector_list, head) { | |
242 | struct intel_output *intel_output = to_intel_output(connector); | |
243 | ||
244 | if (intel_output->hot_plug) | |
245 | (*intel_output->hot_plug) (intel_output); | |
246 | } | |
247 | } | |
5ca58282 JB |
248 | /* Just fire off a uevent and let userspace tell us what to do */ |
249 | drm_sysfs_hotplug_event(dev); | |
250 | } | |
251 | ||
036a4a7d ZW |
252 | irqreturn_t igdng_irq_handler(struct drm_device *dev) |
253 | { | |
254 | drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; | |
255 | int ret = IRQ_NONE; | |
256 | u32 de_iir, gt_iir; | |
257 | u32 new_de_iir, new_gt_iir; | |
258 | struct drm_i915_master_private *master_priv; | |
259 | ||
260 | de_iir = I915_READ(DEIIR); | |
261 | gt_iir = I915_READ(GTIIR); | |
262 | ||
263 | for (;;) { | |
264 | if (de_iir == 0 && gt_iir == 0) | |
265 | break; | |
266 | ||
267 | ret = IRQ_HANDLED; | |
268 | ||
269 | I915_WRITE(DEIIR, de_iir); | |
270 | new_de_iir = I915_READ(DEIIR); | |
271 | I915_WRITE(GTIIR, gt_iir); | |
272 | new_gt_iir = I915_READ(GTIIR); | |
273 | ||
274 | if (dev->primary->master) { | |
275 | master_priv = dev->primary->master->driver_priv; | |
276 | if (master_priv->sarea_priv) | |
277 | master_priv->sarea_priv->last_dispatch = | |
278 | READ_BREADCRUMB(dev_priv); | |
279 | } | |
280 | ||
281 | if (gt_iir & GT_USER_INTERRUPT) { | |
282 | dev_priv->mm.irq_gem_seqno = i915_get_gem_seqno(dev); | |
283 | DRM_WAKEUP(&dev_priv->irq_queue); | |
284 | } | |
285 | ||
286 | de_iir = new_de_iir; | |
287 | gt_iir = new_gt_iir; | |
288 | } | |
289 | ||
290 | return ret; | |
291 | } | |
292 | ||
8a905236 JB |
293 | /** |
294 | * i915_error_work_func - do process context error handling work | |
295 | * @work: work struct | |
296 | * | |
297 | * Fire an error uevent so userspace can see that a hang or error | |
298 | * was detected. | |
299 | */ | |
300 | static void i915_error_work_func(struct work_struct *work) | |
301 | { | |
302 | drm_i915_private_t *dev_priv = container_of(work, drm_i915_private_t, | |
303 | error_work); | |
304 | struct drm_device *dev = dev_priv->dev; | |
f316a42c BG |
305 | char *error_event[] = { "ERROR=1", NULL }; |
306 | char *reset_event[] = { "RESET=1", NULL }; | |
307 | char *reset_done_event[] = { "ERROR=0", NULL }; | |
8a905236 JB |
308 | |
309 | DRM_DEBUG("generating error event\n"); | |
f316a42c BG |
310 | kobject_uevent_env(&dev->primary->kdev.kobj, KOBJ_CHANGE, error_event); |
311 | ||
312 | if (dev_priv->mm.wedged) { | |
313 | if (IS_I965G(dev)) { | |
314 | DRM_DEBUG("resetting chip\n"); | |
315 | kobject_uevent_env(&dev->primary->kdev.kobj, KOBJ_CHANGE, reset_event); | |
316 | if (!i965_reset(dev, GDRST_RENDER)) { | |
317 | dev_priv->mm.wedged = 0; | |
318 | kobject_uevent_env(&dev->primary->kdev.kobj, KOBJ_CHANGE, reset_done_event); | |
319 | } | |
320 | } else { | |
321 | printk("reboot required\n"); | |
322 | } | |
323 | } | |
8a905236 JB |
324 | } |
325 | ||
326 | /** | |
327 | * i915_capture_error_state - capture an error record for later analysis | |
328 | * @dev: drm device | |
329 | * | |
330 | * Should be called when an error is detected (either a hang or an error | |
331 | * interrupt) to capture error state from the time of the error. Fills | |
332 | * out a structure which becomes available in debugfs for user level tools | |
333 | * to pick up. | |
334 | */ | |
63eeaf38 JB |
335 | static void i915_capture_error_state(struct drm_device *dev) |
336 | { | |
337 | struct drm_i915_private *dev_priv = dev->dev_private; | |
338 | struct drm_i915_error_state *error; | |
339 | unsigned long flags; | |
340 | ||
341 | spin_lock_irqsave(&dev_priv->error_lock, flags); | |
342 | if (dev_priv->first_error) | |
343 | goto out; | |
344 | ||
345 | error = kmalloc(sizeof(*error), GFP_ATOMIC); | |
346 | if (!error) { | |
347 | DRM_DEBUG("out ot memory, not capturing error state\n"); | |
348 | goto out; | |
349 | } | |
350 | ||
351 | error->eir = I915_READ(EIR); | |
352 | error->pgtbl_er = I915_READ(PGTBL_ER); | |
353 | error->pipeastat = I915_READ(PIPEASTAT); | |
354 | error->pipebstat = I915_READ(PIPEBSTAT); | |
355 | error->instpm = I915_READ(INSTPM); | |
356 | if (!IS_I965G(dev)) { | |
357 | error->ipeir = I915_READ(IPEIR); | |
358 | error->ipehr = I915_READ(IPEHR); | |
359 | error->instdone = I915_READ(INSTDONE); | |
360 | error->acthd = I915_READ(ACTHD); | |
361 | } else { | |
362 | error->ipeir = I915_READ(IPEIR_I965); | |
363 | error->ipehr = I915_READ(IPEHR_I965); | |
364 | error->instdone = I915_READ(INSTDONE_I965); | |
365 | error->instps = I915_READ(INSTPS); | |
366 | error->instdone1 = I915_READ(INSTDONE1); | |
367 | error->acthd = I915_READ(ACTHD_I965); | |
368 | } | |
369 | ||
8a905236 JB |
370 | do_gettimeofday(&error->time); |
371 | ||
63eeaf38 JB |
372 | dev_priv->first_error = error; |
373 | ||
374 | out: | |
375 | spin_unlock_irqrestore(&dev_priv->error_lock, flags); | |
376 | } | |
377 | ||
8a905236 JB |
378 | /** |
379 | * i915_handle_error - handle an error interrupt | |
380 | * @dev: drm device | |
381 | * | |
382 | * Do some basic checking of regsiter state at error interrupt time and | |
383 | * dump it to the syslog. Also call i915_capture_error_state() to make | |
384 | * sure we get a record and make it available in debugfs. Fire a uevent | |
385 | * so userspace knows something bad happened (should trigger collection | |
386 | * of a ring dump etc.). | |
387 | */ | |
388 | static void i915_handle_error(struct drm_device *dev) | |
389 | { | |
390 | struct drm_i915_private *dev_priv = dev->dev_private; | |
391 | u32 eir = I915_READ(EIR); | |
392 | u32 pipea_stats = I915_READ(PIPEASTAT); | |
393 | u32 pipeb_stats = I915_READ(PIPEBSTAT); | |
394 | ||
395 | i915_capture_error_state(dev); | |
396 | ||
397 | printk(KERN_ERR "render error detected, EIR: 0x%08x\n", | |
398 | eir); | |
399 | ||
400 | if (IS_G4X(dev)) { | |
401 | if (eir & (GM45_ERROR_MEM_PRIV | GM45_ERROR_CP_PRIV)) { | |
402 | u32 ipeir = I915_READ(IPEIR_I965); | |
403 | ||
404 | printk(KERN_ERR " IPEIR: 0x%08x\n", | |
405 | I915_READ(IPEIR_I965)); | |
406 | printk(KERN_ERR " IPEHR: 0x%08x\n", | |
407 | I915_READ(IPEHR_I965)); | |
408 | printk(KERN_ERR " INSTDONE: 0x%08x\n", | |
409 | I915_READ(INSTDONE_I965)); | |
410 | printk(KERN_ERR " INSTPS: 0x%08x\n", | |
411 | I915_READ(INSTPS)); | |
412 | printk(KERN_ERR " INSTDONE1: 0x%08x\n", | |
413 | I915_READ(INSTDONE1)); | |
414 | printk(KERN_ERR " ACTHD: 0x%08x\n", | |
415 | I915_READ(ACTHD_I965)); | |
416 | I915_WRITE(IPEIR_I965, ipeir); | |
417 | (void)I915_READ(IPEIR_I965); | |
418 | } | |
419 | if (eir & GM45_ERROR_PAGE_TABLE) { | |
420 | u32 pgtbl_err = I915_READ(PGTBL_ER); | |
421 | printk(KERN_ERR "page table error\n"); | |
422 | printk(KERN_ERR " PGTBL_ER: 0x%08x\n", | |
423 | pgtbl_err); | |
424 | I915_WRITE(PGTBL_ER, pgtbl_err); | |
425 | (void)I915_READ(PGTBL_ER); | |
426 | } | |
427 | } | |
428 | ||
429 | if (IS_I9XX(dev)) { | |
430 | if (eir & I915_ERROR_PAGE_TABLE) { | |
431 | u32 pgtbl_err = I915_READ(PGTBL_ER); | |
432 | printk(KERN_ERR "page table error\n"); | |
433 | printk(KERN_ERR " PGTBL_ER: 0x%08x\n", | |
434 | pgtbl_err); | |
435 | I915_WRITE(PGTBL_ER, pgtbl_err); | |
436 | (void)I915_READ(PGTBL_ER); | |
437 | } | |
438 | } | |
439 | ||
440 | if (eir & I915_ERROR_MEMORY_REFRESH) { | |
441 | printk(KERN_ERR "memory refresh error\n"); | |
442 | printk(KERN_ERR "PIPEASTAT: 0x%08x\n", | |
443 | pipea_stats); | |
444 | printk(KERN_ERR "PIPEBSTAT: 0x%08x\n", | |
445 | pipeb_stats); | |
446 | /* pipestat has already been acked */ | |
447 | } | |
448 | if (eir & I915_ERROR_INSTRUCTION) { | |
449 | printk(KERN_ERR "instruction error\n"); | |
450 | printk(KERN_ERR " INSTPM: 0x%08x\n", | |
451 | I915_READ(INSTPM)); | |
452 | if (!IS_I965G(dev)) { | |
453 | u32 ipeir = I915_READ(IPEIR); | |
454 | ||
455 | printk(KERN_ERR " IPEIR: 0x%08x\n", | |
456 | I915_READ(IPEIR)); | |
457 | printk(KERN_ERR " IPEHR: 0x%08x\n", | |
458 | I915_READ(IPEHR)); | |
459 | printk(KERN_ERR " INSTDONE: 0x%08x\n", | |
460 | I915_READ(INSTDONE)); | |
461 | printk(KERN_ERR " ACTHD: 0x%08x\n", | |
462 | I915_READ(ACTHD)); | |
463 | I915_WRITE(IPEIR, ipeir); | |
464 | (void)I915_READ(IPEIR); | |
465 | } else { | |
466 | u32 ipeir = I915_READ(IPEIR_I965); | |
467 | ||
468 | printk(KERN_ERR " IPEIR: 0x%08x\n", | |
469 | I915_READ(IPEIR_I965)); | |
470 | printk(KERN_ERR " IPEHR: 0x%08x\n", | |
471 | I915_READ(IPEHR_I965)); | |
472 | printk(KERN_ERR " INSTDONE: 0x%08x\n", | |
473 | I915_READ(INSTDONE_I965)); | |
474 | printk(KERN_ERR " INSTPS: 0x%08x\n", | |
475 | I915_READ(INSTPS)); | |
476 | printk(KERN_ERR " INSTDONE1: 0x%08x\n", | |
477 | I915_READ(INSTDONE1)); | |
478 | printk(KERN_ERR " ACTHD: 0x%08x\n", | |
479 | I915_READ(ACTHD_I965)); | |
480 | I915_WRITE(IPEIR_I965, ipeir); | |
481 | (void)I915_READ(IPEIR_I965); | |
482 | } | |
483 | } | |
484 | ||
485 | I915_WRITE(EIR, eir); | |
486 | (void)I915_READ(EIR); | |
487 | eir = I915_READ(EIR); | |
488 | if (eir) { | |
489 | /* | |
490 | * some errors might have become stuck, | |
491 | * mask them. | |
492 | */ | |
493 | DRM_ERROR("EIR stuck: 0x%08x, masking\n", eir); | |
494 | I915_WRITE(EMR, I915_READ(EMR) | eir); | |
495 | I915_WRITE(IIR, I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT); | |
496 | } | |
497 | ||
11ed50ec BG |
498 | if (dev_priv->mm.wedged) { |
499 | /* | |
500 | * Wakeup waiting processes so they don't hang | |
501 | */ | |
502 | printk("i915: Waking up sleeping processes\n"); | |
503 | DRM_WAKEUP(&dev_priv->irq_queue); | |
504 | } | |
505 | ||
9c9fe1f8 | 506 | queue_work(dev_priv->wq, &dev_priv->error_work); |
8a905236 JB |
507 | } |
508 | ||
1da177e4 LT |
509 | irqreturn_t i915_driver_irq_handler(DRM_IRQ_ARGS) |
510 | { | |
84b1fd10 | 511 | struct drm_device *dev = (struct drm_device *) arg; |
1da177e4 | 512 | drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; |
7c1c2871 | 513 | struct drm_i915_master_private *master_priv; |
cdfbc41f EA |
514 | u32 iir, new_iir; |
515 | u32 pipea_stats, pipeb_stats; | |
05eff845 KP |
516 | u32 vblank_status; |
517 | u32 vblank_enable; | |
0a3e67a4 | 518 | int vblank = 0; |
7c463586 | 519 | unsigned long irqflags; |
05eff845 KP |
520 | int irq_received; |
521 | int ret = IRQ_NONE; | |
6e5fca53 | 522 | |
630681d9 EA |
523 | atomic_inc(&dev_priv->irq_received); |
524 | ||
036a4a7d ZW |
525 | if (IS_IGDNG(dev)) |
526 | return igdng_irq_handler(dev); | |
527 | ||
ed4cb414 | 528 | iir = I915_READ(IIR); |
a6b54f3f | 529 | |
05eff845 KP |
530 | if (IS_I965G(dev)) { |
531 | vblank_status = I915_START_VBLANK_INTERRUPT_STATUS; | |
532 | vblank_enable = PIPE_START_VBLANK_INTERRUPT_ENABLE; | |
533 | } else { | |
534 | vblank_status = I915_VBLANK_INTERRUPT_STATUS; | |
535 | vblank_enable = I915_VBLANK_INTERRUPT_ENABLE; | |
536 | } | |
af6061af | 537 | |
05eff845 KP |
538 | for (;;) { |
539 | irq_received = iir != 0; | |
540 | ||
541 | /* Can't rely on pipestat interrupt bit in iir as it might | |
542 | * have been cleared after the pipestat interrupt was received. | |
543 | * It doesn't set the bit in iir again, but it still produces | |
544 | * interrupts (for non-MSI). | |
545 | */ | |
546 | spin_lock_irqsave(&dev_priv->user_irq_lock, irqflags); | |
547 | pipea_stats = I915_READ(PIPEASTAT); | |
548 | pipeb_stats = I915_READ(PIPEBSTAT); | |
79e53945 | 549 | |
8a905236 JB |
550 | if (iir & I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT) |
551 | i915_handle_error(dev); | |
552 | ||
cdfbc41f EA |
553 | /* |
554 | * Clear the PIPE(A|B)STAT regs before the IIR | |
555 | */ | |
05eff845 | 556 | if (pipea_stats & 0x8000ffff) { |
7662c8bd SL |
557 | if (pipea_stats & PIPE_FIFO_UNDERRUN_STATUS) |
558 | DRM_DEBUG("pipe a underrun\n"); | |
cdfbc41f | 559 | I915_WRITE(PIPEASTAT, pipea_stats); |
05eff845 | 560 | irq_received = 1; |
cdfbc41f | 561 | } |
1da177e4 | 562 | |
05eff845 | 563 | if (pipeb_stats & 0x8000ffff) { |
7662c8bd SL |
564 | if (pipeb_stats & PIPE_FIFO_UNDERRUN_STATUS) |
565 | DRM_DEBUG("pipe b underrun\n"); | |
cdfbc41f | 566 | I915_WRITE(PIPEBSTAT, pipeb_stats); |
05eff845 | 567 | irq_received = 1; |
cdfbc41f | 568 | } |
05eff845 KP |
569 | spin_unlock_irqrestore(&dev_priv->user_irq_lock, irqflags); |
570 | ||
571 | if (!irq_received) | |
572 | break; | |
573 | ||
574 | ret = IRQ_HANDLED; | |
8ee1c3db | 575 | |
5ca58282 JB |
576 | /* Consume port. Then clear IIR or we'll miss events */ |
577 | if ((I915_HAS_HOTPLUG(dev)) && | |
578 | (iir & I915_DISPLAY_PORT_INTERRUPT)) { | |
579 | u32 hotplug_status = I915_READ(PORT_HOTPLUG_STAT); | |
580 | ||
581 | DRM_DEBUG("hotplug event received, stat 0x%08x\n", | |
582 | hotplug_status); | |
583 | if (hotplug_status & dev_priv->hotplug_supported_mask) | |
9c9fe1f8 EA |
584 | queue_work(dev_priv->wq, |
585 | &dev_priv->hotplug_work); | |
5ca58282 JB |
586 | |
587 | I915_WRITE(PORT_HOTPLUG_STAT, hotplug_status); | |
588 | I915_READ(PORT_HOTPLUG_STAT); | |
04302965 SL |
589 | |
590 | /* EOS interrupts occurs */ | |
591 | if (IS_IGD(dev) && | |
592 | (hotplug_status & CRT_EOS_INT_STATUS)) { | |
593 | u32 temp; | |
594 | ||
595 | DRM_DEBUG("EOS interrupt occurs\n"); | |
596 | /* status is already cleared */ | |
597 | temp = I915_READ(ADPA); | |
598 | temp &= ~ADPA_DAC_ENABLE; | |
599 | I915_WRITE(ADPA, temp); | |
600 | ||
601 | temp = I915_READ(PORT_HOTPLUG_EN); | |
602 | temp &= ~CRT_EOS_INT_EN; | |
603 | I915_WRITE(PORT_HOTPLUG_EN, temp); | |
604 | ||
605 | temp = I915_READ(PORT_HOTPLUG_STAT); | |
606 | if (temp & CRT_EOS_INT_STATUS) | |
607 | I915_WRITE(PORT_HOTPLUG_STAT, | |
608 | CRT_EOS_INT_STATUS); | |
609 | } | |
5ca58282 JB |
610 | } |
611 | ||
cdfbc41f EA |
612 | I915_WRITE(IIR, iir); |
613 | new_iir = I915_READ(IIR); /* Flush posted writes */ | |
7c463586 | 614 | |
7c1c2871 DA |
615 | if (dev->primary->master) { |
616 | master_priv = dev->primary->master->driver_priv; | |
617 | if (master_priv->sarea_priv) | |
618 | master_priv->sarea_priv->last_dispatch = | |
619 | READ_BREADCRUMB(dev_priv); | |
620 | } | |
0a3e67a4 | 621 | |
cdfbc41f EA |
622 | if (iir & I915_USER_INTERRUPT) { |
623 | dev_priv->mm.irq_gem_seqno = i915_get_gem_seqno(dev); | |
624 | DRM_WAKEUP(&dev_priv->irq_queue); | |
f65d9421 BG |
625 | dev_priv->hangcheck_count = 0; |
626 | mod_timer(&dev_priv->hangcheck_timer, jiffies + DRM_I915_HANGCHECK_PERIOD); | |
cdfbc41f | 627 | } |
673a394b | 628 | |
05eff845 | 629 | if (pipea_stats & vblank_status) { |
cdfbc41f EA |
630 | vblank++; |
631 | drm_handle_vblank(dev, 0); | |
632 | } | |
7c463586 | 633 | |
05eff845 | 634 | if (pipeb_stats & vblank_status) { |
cdfbc41f EA |
635 | vblank++; |
636 | drm_handle_vblank(dev, 1); | |
637 | } | |
7c463586 | 638 | |
cdfbc41f EA |
639 | if ((pipeb_stats & I915_LEGACY_BLC_EVENT_STATUS) || |
640 | (iir & I915_ASLE_INTERRUPT)) | |
641 | opregion_asle_intr(dev); | |
642 | ||
643 | /* With MSI, interrupts are only generated when iir | |
644 | * transitions from zero to nonzero. If another bit got | |
645 | * set while we were handling the existing iir bits, then | |
646 | * we would never get another interrupt. | |
647 | * | |
648 | * This is fine on non-MSI as well, as if we hit this path | |
649 | * we avoid exiting the interrupt handler only to generate | |
650 | * another one. | |
651 | * | |
652 | * Note that for MSI this could cause a stray interrupt report | |
653 | * if an interrupt landed in the time between writing IIR and | |
654 | * the posting read. This should be rare enough to never | |
655 | * trigger the 99% of 100,000 interrupts test for disabling | |
656 | * stray interrupts. | |
657 | */ | |
658 | iir = new_iir; | |
05eff845 | 659 | } |
0a3e67a4 | 660 | |
05eff845 | 661 | return ret; |
1da177e4 LT |
662 | } |
663 | ||
af6061af | 664 | static int i915_emit_irq(struct drm_device * dev) |
1da177e4 LT |
665 | { |
666 | drm_i915_private_t *dev_priv = dev->dev_private; | |
7c1c2871 | 667 | struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv; |
1da177e4 LT |
668 | RING_LOCALS; |
669 | ||
670 | i915_kernel_lost_context(dev); | |
671 | ||
3e684eae | 672 | DRM_DEBUG("\n"); |
1da177e4 | 673 | |
c99b058f | 674 | dev_priv->counter++; |
c29b669c | 675 | if (dev_priv->counter > 0x7FFFFFFFUL) |
c99b058f | 676 | dev_priv->counter = 1; |
7c1c2871 DA |
677 | if (master_priv->sarea_priv) |
678 | master_priv->sarea_priv->last_enqueue = dev_priv->counter; | |
c29b669c | 679 | |
0baf823a | 680 | BEGIN_LP_RING(4); |
585fb111 | 681 | OUT_RING(MI_STORE_DWORD_INDEX); |
0baf823a | 682 | OUT_RING(I915_BREADCRUMB_INDEX << MI_STORE_DWORD_INDEX_SHIFT); |
c29b669c | 683 | OUT_RING(dev_priv->counter); |
585fb111 | 684 | OUT_RING(MI_USER_INTERRUPT); |
1da177e4 | 685 | ADVANCE_LP_RING(); |
bc5f4523 | 686 | |
c29b669c | 687 | return dev_priv->counter; |
1da177e4 LT |
688 | } |
689 | ||
673a394b | 690 | void i915_user_irq_get(struct drm_device *dev) |
ed4cb414 EA |
691 | { |
692 | drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; | |
e9d21d7f | 693 | unsigned long irqflags; |
ed4cb414 | 694 | |
e9d21d7f | 695 | spin_lock_irqsave(&dev_priv->user_irq_lock, irqflags); |
036a4a7d ZW |
696 | if (dev->irq_enabled && (++dev_priv->user_irq_refcount == 1)) { |
697 | if (IS_IGDNG(dev)) | |
698 | igdng_enable_graphics_irq(dev_priv, GT_USER_INTERRUPT); | |
699 | else | |
700 | i915_enable_irq(dev_priv, I915_USER_INTERRUPT); | |
701 | } | |
e9d21d7f | 702 | spin_unlock_irqrestore(&dev_priv->user_irq_lock, irqflags); |
ed4cb414 EA |
703 | } |
704 | ||
0a3e67a4 | 705 | void i915_user_irq_put(struct drm_device *dev) |
ed4cb414 EA |
706 | { |
707 | drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; | |
e9d21d7f | 708 | unsigned long irqflags; |
ed4cb414 | 709 | |
e9d21d7f | 710 | spin_lock_irqsave(&dev_priv->user_irq_lock, irqflags); |
ed4cb414 | 711 | BUG_ON(dev->irq_enabled && dev_priv->user_irq_refcount <= 0); |
036a4a7d ZW |
712 | if (dev->irq_enabled && (--dev_priv->user_irq_refcount == 0)) { |
713 | if (IS_IGDNG(dev)) | |
714 | igdng_disable_graphics_irq(dev_priv, GT_USER_INTERRUPT); | |
715 | else | |
716 | i915_disable_irq(dev_priv, I915_USER_INTERRUPT); | |
717 | } | |
e9d21d7f | 718 | spin_unlock_irqrestore(&dev_priv->user_irq_lock, irqflags); |
ed4cb414 EA |
719 | } |
720 | ||
84b1fd10 | 721 | static int i915_wait_irq(struct drm_device * dev, int irq_nr) |
1da177e4 LT |
722 | { |
723 | drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; | |
7c1c2871 | 724 | struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv; |
1da177e4 LT |
725 | int ret = 0; |
726 | ||
3e684eae | 727 | DRM_DEBUG("irq_nr=%d breadcrumb=%d\n", irq_nr, |
1da177e4 LT |
728 | READ_BREADCRUMB(dev_priv)); |
729 | ||
ed4cb414 | 730 | if (READ_BREADCRUMB(dev_priv) >= irq_nr) { |
7c1c2871 DA |
731 | if (master_priv->sarea_priv) |
732 | master_priv->sarea_priv->last_dispatch = READ_BREADCRUMB(dev_priv); | |
1da177e4 | 733 | return 0; |
ed4cb414 | 734 | } |
1da177e4 | 735 | |
7c1c2871 DA |
736 | if (master_priv->sarea_priv) |
737 | master_priv->sarea_priv->perf_boxes |= I915_BOX_WAIT; | |
1da177e4 | 738 | |
ed4cb414 | 739 | i915_user_irq_get(dev); |
1da177e4 LT |
740 | DRM_WAIT_ON(ret, dev_priv->irq_queue, 3 * DRM_HZ, |
741 | READ_BREADCRUMB(dev_priv) >= irq_nr); | |
ed4cb414 | 742 | i915_user_irq_put(dev); |
1da177e4 | 743 | |
20caafa6 | 744 | if (ret == -EBUSY) { |
3e684eae | 745 | DRM_ERROR("EBUSY -- rec: %d emitted: %d\n", |
1da177e4 LT |
746 | READ_BREADCRUMB(dev_priv), (int)dev_priv->counter); |
747 | } | |
748 | ||
af6061af DA |
749 | return ret; |
750 | } | |
751 | ||
1da177e4 LT |
752 | /* Needs the lock as it touches the ring. |
753 | */ | |
c153f45f EA |
754 | int i915_irq_emit(struct drm_device *dev, void *data, |
755 | struct drm_file *file_priv) | |
1da177e4 | 756 | { |
1da177e4 | 757 | drm_i915_private_t *dev_priv = dev->dev_private; |
c153f45f | 758 | drm_i915_irq_emit_t *emit = data; |
1da177e4 LT |
759 | int result; |
760 | ||
07f4f8bf | 761 | if (!dev_priv || !dev_priv->ring.virtual_start) { |
3e684eae | 762 | DRM_ERROR("called with no initialization\n"); |
20caafa6 | 763 | return -EINVAL; |
1da177e4 | 764 | } |
299eb93c EA |
765 | |
766 | RING_LOCK_TEST_WITH_RETURN(dev, file_priv); | |
767 | ||
546b0974 | 768 | mutex_lock(&dev->struct_mutex); |
1da177e4 | 769 | result = i915_emit_irq(dev); |
546b0974 | 770 | mutex_unlock(&dev->struct_mutex); |
1da177e4 | 771 | |
c153f45f | 772 | if (DRM_COPY_TO_USER(emit->irq_seq, &result, sizeof(int))) { |
1da177e4 | 773 | DRM_ERROR("copy_to_user\n"); |
20caafa6 | 774 | return -EFAULT; |
1da177e4 LT |
775 | } |
776 | ||
777 | return 0; | |
778 | } | |
779 | ||
780 | /* Doesn't need the hardware lock. | |
781 | */ | |
c153f45f EA |
782 | int i915_irq_wait(struct drm_device *dev, void *data, |
783 | struct drm_file *file_priv) | |
1da177e4 | 784 | { |
1da177e4 | 785 | drm_i915_private_t *dev_priv = dev->dev_private; |
c153f45f | 786 | drm_i915_irq_wait_t *irqwait = data; |
1da177e4 LT |
787 | |
788 | if (!dev_priv) { | |
3e684eae | 789 | DRM_ERROR("called with no initialization\n"); |
20caafa6 | 790 | return -EINVAL; |
1da177e4 LT |
791 | } |
792 | ||
c153f45f | 793 | return i915_wait_irq(dev, irqwait->irq_seq); |
1da177e4 LT |
794 | } |
795 | ||
42f52ef8 KP |
796 | /* Called from drm generic code, passed 'crtc' which |
797 | * we use as a pipe index | |
798 | */ | |
799 | int i915_enable_vblank(struct drm_device *dev, int pipe) | |
0a3e67a4 JB |
800 | { |
801 | drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; | |
e9d21d7f | 802 | unsigned long irqflags; |
71e0ffa5 JB |
803 | int pipeconf_reg = (pipe == 0) ? PIPEACONF : PIPEBCONF; |
804 | u32 pipeconf; | |
805 | ||
806 | pipeconf = I915_READ(pipeconf_reg); | |
807 | if (!(pipeconf & PIPEACONF_ENABLE)) | |
808 | return -EINVAL; | |
0a3e67a4 | 809 | |
036a4a7d ZW |
810 | if (IS_IGDNG(dev)) |
811 | return 0; | |
812 | ||
e9d21d7f | 813 | spin_lock_irqsave(&dev_priv->user_irq_lock, irqflags); |
e9d21d7f | 814 | if (IS_I965G(dev)) |
7c463586 KP |
815 | i915_enable_pipestat(dev_priv, pipe, |
816 | PIPE_START_VBLANK_INTERRUPT_ENABLE); | |
e9d21d7f | 817 | else |
7c463586 KP |
818 | i915_enable_pipestat(dev_priv, pipe, |
819 | PIPE_VBLANK_INTERRUPT_ENABLE); | |
e9d21d7f | 820 | spin_unlock_irqrestore(&dev_priv->user_irq_lock, irqflags); |
0a3e67a4 JB |
821 | return 0; |
822 | } | |
823 | ||
42f52ef8 KP |
824 | /* Called from drm generic code, passed 'crtc' which |
825 | * we use as a pipe index | |
826 | */ | |
827 | void i915_disable_vblank(struct drm_device *dev, int pipe) | |
0a3e67a4 JB |
828 | { |
829 | drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; | |
e9d21d7f | 830 | unsigned long irqflags; |
0a3e67a4 | 831 | |
036a4a7d ZW |
832 | if (IS_IGDNG(dev)) |
833 | return; | |
834 | ||
e9d21d7f | 835 | spin_lock_irqsave(&dev_priv->user_irq_lock, irqflags); |
7c463586 KP |
836 | i915_disable_pipestat(dev_priv, pipe, |
837 | PIPE_VBLANK_INTERRUPT_ENABLE | | |
838 | PIPE_START_VBLANK_INTERRUPT_ENABLE); | |
e9d21d7f | 839 | spin_unlock_irqrestore(&dev_priv->user_irq_lock, irqflags); |
0a3e67a4 JB |
840 | } |
841 | ||
79e53945 JB |
842 | void i915_enable_interrupt (struct drm_device *dev) |
843 | { | |
844 | struct drm_i915_private *dev_priv = dev->dev_private; | |
e170b030 ZW |
845 | |
846 | if (!IS_IGDNG(dev)) | |
847 | opregion_enable_asle(dev); | |
79e53945 JB |
848 | dev_priv->irq_enabled = 1; |
849 | } | |
850 | ||
851 | ||
702880f2 DA |
852 | /* Set the vblank monitor pipe |
853 | */ | |
c153f45f EA |
854 | int i915_vblank_pipe_set(struct drm_device *dev, void *data, |
855 | struct drm_file *file_priv) | |
702880f2 | 856 | { |
702880f2 | 857 | drm_i915_private_t *dev_priv = dev->dev_private; |
702880f2 DA |
858 | |
859 | if (!dev_priv) { | |
3e684eae | 860 | DRM_ERROR("called with no initialization\n"); |
20caafa6 | 861 | return -EINVAL; |
702880f2 DA |
862 | } |
863 | ||
5b51694a | 864 | return 0; |
702880f2 DA |
865 | } |
866 | ||
c153f45f EA |
867 | int i915_vblank_pipe_get(struct drm_device *dev, void *data, |
868 | struct drm_file *file_priv) | |
702880f2 | 869 | { |
702880f2 | 870 | drm_i915_private_t *dev_priv = dev->dev_private; |
c153f45f | 871 | drm_i915_vblank_pipe_t *pipe = data; |
702880f2 DA |
872 | |
873 | if (!dev_priv) { | |
3e684eae | 874 | DRM_ERROR("called with no initialization\n"); |
20caafa6 | 875 | return -EINVAL; |
702880f2 DA |
876 | } |
877 | ||
0a3e67a4 | 878 | pipe->pipe = DRM_I915_VBLANK_PIPE_A | DRM_I915_VBLANK_PIPE_B; |
c153f45f | 879 | |
702880f2 DA |
880 | return 0; |
881 | } | |
882 | ||
a6b54f3f MD |
883 | /** |
884 | * Schedule buffer swap at given vertical blank. | |
885 | */ | |
c153f45f EA |
886 | int i915_vblank_swap(struct drm_device *dev, void *data, |
887 | struct drm_file *file_priv) | |
a6b54f3f | 888 | { |
bd95e0a4 EA |
889 | /* The delayed swap mechanism was fundamentally racy, and has been |
890 | * removed. The model was that the client requested a delayed flip/swap | |
891 | * from the kernel, then waited for vblank before continuing to perform | |
892 | * rendering. The problem was that the kernel might wake the client | |
893 | * up before it dispatched the vblank swap (since the lock has to be | |
894 | * held while touching the ringbuffer), in which case the client would | |
895 | * clear and start the next frame before the swap occurred, and | |
896 | * flicker would occur in addition to likely missing the vblank. | |
897 | * | |
898 | * In the absence of this ioctl, userland falls back to a correct path | |
899 | * of waiting for a vblank, then dispatching the swap on its own. | |
900 | * Context switching to userland and back is plenty fast enough for | |
901 | * meeting the requirements of vblank swapping. | |
0a3e67a4 | 902 | */ |
bd95e0a4 | 903 | return -EINVAL; |
a6b54f3f MD |
904 | } |
905 | ||
f65d9421 BG |
906 | struct drm_i915_gem_request *i915_get_tail_request(struct drm_device *dev) { |
907 | drm_i915_private_t *dev_priv = dev->dev_private; | |
908 | return list_entry(dev_priv->mm.request_list.prev, struct drm_i915_gem_request, list); | |
909 | } | |
910 | ||
911 | /** | |
912 | * This is called when the chip hasn't reported back with completed | |
913 | * batchbuffers in a long time. The first time this is called we simply record | |
914 | * ACTHD. If ACTHD hasn't changed by the time the hangcheck timer elapses | |
915 | * again, we assume the chip is wedged and try to fix it. | |
916 | */ | |
917 | void i915_hangcheck_elapsed(unsigned long data) | |
918 | { | |
919 | struct drm_device *dev = (struct drm_device *)data; | |
920 | drm_i915_private_t *dev_priv = dev->dev_private; | |
921 | uint32_t acthd; | |
922 | ||
923 | if (!IS_I965G(dev)) | |
924 | acthd = I915_READ(ACTHD); | |
925 | else | |
926 | acthd = I915_READ(ACTHD_I965); | |
927 | ||
928 | /* If all work is done then ACTHD clearly hasn't advanced. */ | |
929 | if (list_empty(&dev_priv->mm.request_list) || | |
930 | i915_seqno_passed(i915_get_gem_seqno(dev), i915_get_tail_request(dev)->seqno)) { | |
931 | dev_priv->hangcheck_count = 0; | |
932 | return; | |
933 | } | |
934 | ||
935 | if (dev_priv->last_acthd == acthd && dev_priv->hangcheck_count > 0) { | |
936 | DRM_ERROR("Hangcheck timer elapsed... GPU hung\n"); | |
937 | dev_priv->mm.wedged = true; /* Hopefully this is atomic */ | |
938 | i915_handle_error(dev); | |
939 | return; | |
940 | } | |
941 | ||
942 | /* Reset timer case chip hangs without another request being added */ | |
943 | mod_timer(&dev_priv->hangcheck_timer, jiffies + DRM_I915_HANGCHECK_PERIOD); | |
944 | ||
945 | if (acthd != dev_priv->last_acthd) | |
946 | dev_priv->hangcheck_count = 0; | |
947 | else | |
948 | dev_priv->hangcheck_count++; | |
949 | ||
950 | dev_priv->last_acthd = acthd; | |
951 | } | |
952 | ||
1da177e4 LT |
953 | /* drm_dma.h hooks |
954 | */ | |
036a4a7d ZW |
955 | static void igdng_irq_preinstall(struct drm_device *dev) |
956 | { | |
957 | drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; | |
958 | ||
959 | I915_WRITE(HWSTAM, 0xeffe); | |
960 | ||
961 | /* XXX hotplug from PCH */ | |
962 | ||
963 | I915_WRITE(DEIMR, 0xffffffff); | |
964 | I915_WRITE(DEIER, 0x0); | |
965 | (void) I915_READ(DEIER); | |
966 | ||
967 | /* and GT */ | |
968 | I915_WRITE(GTIMR, 0xffffffff); | |
969 | I915_WRITE(GTIER, 0x0); | |
970 | (void) I915_READ(GTIER); | |
971 | } | |
972 | ||
973 | static int igdng_irq_postinstall(struct drm_device *dev) | |
974 | { | |
975 | drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; | |
976 | /* enable kind of interrupts always enabled */ | |
977 | u32 display_mask = DE_MASTER_IRQ_CONTROL /*| DE_PCH_EVENT */; | |
978 | u32 render_mask = GT_USER_INTERRUPT; | |
979 | ||
980 | dev_priv->irq_mask_reg = ~display_mask; | |
981 | dev_priv->de_irq_enable_reg = display_mask; | |
982 | ||
983 | /* should always can generate irq */ | |
984 | I915_WRITE(DEIIR, I915_READ(DEIIR)); | |
985 | I915_WRITE(DEIMR, dev_priv->irq_mask_reg); | |
986 | I915_WRITE(DEIER, dev_priv->de_irq_enable_reg); | |
987 | (void) I915_READ(DEIER); | |
988 | ||
989 | /* user interrupt should be enabled, but masked initial */ | |
990 | dev_priv->gt_irq_mask_reg = 0xffffffff; | |
991 | dev_priv->gt_irq_enable_reg = render_mask; | |
992 | ||
993 | I915_WRITE(GTIIR, I915_READ(GTIIR)); | |
994 | I915_WRITE(GTIMR, dev_priv->gt_irq_mask_reg); | |
995 | I915_WRITE(GTIER, dev_priv->gt_irq_enable_reg); | |
996 | (void) I915_READ(GTIER); | |
997 | ||
998 | return 0; | |
999 | } | |
1000 | ||
84b1fd10 | 1001 | void i915_driver_irq_preinstall(struct drm_device * dev) |
1da177e4 LT |
1002 | { |
1003 | drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; | |
1004 | ||
79e53945 JB |
1005 | atomic_set(&dev_priv->irq_received, 0); |
1006 | ||
036a4a7d | 1007 | INIT_WORK(&dev_priv->hotplug_work, i915_hotplug_work_func); |
8a905236 | 1008 | INIT_WORK(&dev_priv->error_work, i915_error_work_func); |
036a4a7d ZW |
1009 | |
1010 | if (IS_IGDNG(dev)) { | |
1011 | igdng_irq_preinstall(dev); | |
1012 | return; | |
1013 | } | |
1014 | ||
5ca58282 JB |
1015 | if (I915_HAS_HOTPLUG(dev)) { |
1016 | I915_WRITE(PORT_HOTPLUG_EN, 0); | |
1017 | I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT)); | |
1018 | } | |
1019 | ||
0a3e67a4 | 1020 | I915_WRITE(HWSTAM, 0xeffe); |
7c463586 KP |
1021 | I915_WRITE(PIPEASTAT, 0); |
1022 | I915_WRITE(PIPEBSTAT, 0); | |
0a3e67a4 | 1023 | I915_WRITE(IMR, 0xffffffff); |
ed4cb414 | 1024 | I915_WRITE(IER, 0x0); |
7c463586 | 1025 | (void) I915_READ(IER); |
1da177e4 LT |
1026 | } |
1027 | ||
0a3e67a4 | 1028 | int i915_driver_irq_postinstall(struct drm_device *dev) |
1da177e4 LT |
1029 | { |
1030 | drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; | |
5ca58282 | 1031 | u32 enable_mask = I915_INTERRUPT_ENABLE_FIX | I915_INTERRUPT_ENABLE_VAR; |
63eeaf38 | 1032 | u32 error_mask; |
0a3e67a4 | 1033 | |
036a4a7d ZW |
1034 | DRM_INIT_WAITQUEUE(&dev_priv->irq_queue); |
1035 | ||
0a3e67a4 | 1036 | dev_priv->vblank_pipe = DRM_I915_VBLANK_PIPE_A | DRM_I915_VBLANK_PIPE_B; |
0a3e67a4 | 1037 | |
036a4a7d ZW |
1038 | if (IS_IGDNG(dev)) |
1039 | return igdng_irq_postinstall(dev); | |
1040 | ||
7c463586 KP |
1041 | /* Unmask the interrupts that we always want on. */ |
1042 | dev_priv->irq_mask_reg = ~I915_INTERRUPT_ENABLE_FIX; | |
1043 | ||
1044 | dev_priv->pipestat[0] = 0; | |
1045 | dev_priv->pipestat[1] = 0; | |
1046 | ||
5ca58282 JB |
1047 | if (I915_HAS_HOTPLUG(dev)) { |
1048 | u32 hotplug_en = I915_READ(PORT_HOTPLUG_EN); | |
1049 | ||
1050 | /* Leave other bits alone */ | |
1051 | hotplug_en |= HOTPLUG_EN_MASK; | |
1052 | I915_WRITE(PORT_HOTPLUG_EN, hotplug_en); | |
1053 | ||
1054 | dev_priv->hotplug_supported_mask = CRT_HOTPLUG_INT_STATUS | | |
1055 | TV_HOTPLUG_INT_STATUS | SDVOC_HOTPLUG_INT_STATUS | | |
1056 | SDVOB_HOTPLUG_INT_STATUS; | |
1057 | if (IS_G4X(dev)) { | |
1058 | dev_priv->hotplug_supported_mask |= | |
1059 | HDMIB_HOTPLUG_INT_STATUS | | |
1060 | HDMIC_HOTPLUG_INT_STATUS | | |
1061 | HDMID_HOTPLUG_INT_STATUS; | |
1062 | } | |
1063 | /* Enable in IER... */ | |
1064 | enable_mask |= I915_DISPLAY_PORT_INTERRUPT; | |
1065 | /* and unmask in IMR */ | |
1066 | i915_enable_irq(dev_priv, I915_DISPLAY_PORT_INTERRUPT); | |
1067 | } | |
1068 | ||
63eeaf38 JB |
1069 | /* |
1070 | * Enable some error detection, note the instruction error mask | |
1071 | * bit is reserved, so we leave it masked. | |
1072 | */ | |
1073 | if (IS_G4X(dev)) { | |
1074 | error_mask = ~(GM45_ERROR_PAGE_TABLE | | |
1075 | GM45_ERROR_MEM_PRIV | | |
1076 | GM45_ERROR_CP_PRIV | | |
1077 | I915_ERROR_MEMORY_REFRESH); | |
1078 | } else { | |
1079 | error_mask = ~(I915_ERROR_PAGE_TABLE | | |
1080 | I915_ERROR_MEMORY_REFRESH); | |
1081 | } | |
1082 | I915_WRITE(EMR, error_mask); | |
1083 | ||
7c463586 KP |
1084 | /* Disable pipe interrupt enables, clear pending pipe status */ |
1085 | I915_WRITE(PIPEASTAT, I915_READ(PIPEASTAT) & 0x8000ffff); | |
1086 | I915_WRITE(PIPEBSTAT, I915_READ(PIPEBSTAT) & 0x8000ffff); | |
1087 | /* Clear pending interrupt status */ | |
1088 | I915_WRITE(IIR, I915_READ(IIR)); | |
8ee1c3db | 1089 | |
5ca58282 | 1090 | I915_WRITE(IER, enable_mask); |
7c463586 | 1091 | I915_WRITE(IMR, dev_priv->irq_mask_reg); |
ed4cb414 EA |
1092 | (void) I915_READ(IER); |
1093 | ||
8ee1c3db | 1094 | opregion_enable_asle(dev); |
0a3e67a4 JB |
1095 | |
1096 | return 0; | |
1da177e4 LT |
1097 | } |
1098 | ||
036a4a7d ZW |
1099 | static void igdng_irq_uninstall(struct drm_device *dev) |
1100 | { | |
1101 | drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; | |
1102 | I915_WRITE(HWSTAM, 0xffffffff); | |
1103 | ||
1104 | I915_WRITE(DEIMR, 0xffffffff); | |
1105 | I915_WRITE(DEIER, 0x0); | |
1106 | I915_WRITE(DEIIR, I915_READ(DEIIR)); | |
1107 | ||
1108 | I915_WRITE(GTIMR, 0xffffffff); | |
1109 | I915_WRITE(GTIER, 0x0); | |
1110 | I915_WRITE(GTIIR, I915_READ(GTIIR)); | |
1111 | } | |
1112 | ||
84b1fd10 | 1113 | void i915_driver_irq_uninstall(struct drm_device * dev) |
1da177e4 LT |
1114 | { |
1115 | drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; | |
91e3738e | 1116 | |
1da177e4 LT |
1117 | if (!dev_priv) |
1118 | return; | |
1119 | ||
0a3e67a4 JB |
1120 | dev_priv->vblank_pipe = 0; |
1121 | ||
036a4a7d ZW |
1122 | if (IS_IGDNG(dev)) { |
1123 | igdng_irq_uninstall(dev); | |
1124 | return; | |
1125 | } | |
1126 | ||
5ca58282 JB |
1127 | if (I915_HAS_HOTPLUG(dev)) { |
1128 | I915_WRITE(PORT_HOTPLUG_EN, 0); | |
1129 | I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT)); | |
1130 | } | |
1131 | ||
0a3e67a4 | 1132 | I915_WRITE(HWSTAM, 0xffffffff); |
7c463586 KP |
1133 | I915_WRITE(PIPEASTAT, 0); |
1134 | I915_WRITE(PIPEBSTAT, 0); | |
0a3e67a4 | 1135 | I915_WRITE(IMR, 0xffffffff); |
ed4cb414 | 1136 | I915_WRITE(IER, 0x0); |
af6061af | 1137 | |
7c463586 KP |
1138 | I915_WRITE(PIPEASTAT, I915_READ(PIPEASTAT) & 0x8000ffff); |
1139 | I915_WRITE(PIPEBSTAT, I915_READ(PIPEBSTAT) & 0x8000ffff); | |
1140 | I915_WRITE(IIR, I915_READ(IIR)); | |
1da177e4 | 1141 | } |