Commit | Line | Data |
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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 | ||
f2b115e6 | 272 | irqreturn_t ironlake_irq_handler(struct drm_device *dev) |
036a4a7d ZW |
273 | { |
274 | drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; | |
275 | int ret = IRQ_NONE; | |
3ff99164 | 276 | u32 de_iir, gt_iir, de_ier, pch_iir; |
036a4a7d ZW |
277 | struct drm_i915_master_private *master_priv; |
278 | ||
2d109a84 ZN |
279 | /* disable master interrupt before clearing iir */ |
280 | de_ier = I915_READ(DEIER); | |
281 | I915_WRITE(DEIER, de_ier & ~DE_MASTER_IRQ_CONTROL); | |
282 | (void)I915_READ(DEIER); | |
283 | ||
036a4a7d ZW |
284 | de_iir = I915_READ(DEIIR); |
285 | gt_iir = I915_READ(GTIIR); | |
c650156a | 286 | pch_iir = I915_READ(SDEIIR); |
036a4a7d | 287 | |
c7c85101 ZN |
288 | if (de_iir == 0 && gt_iir == 0 && pch_iir == 0) |
289 | goto done; | |
036a4a7d | 290 | |
c7c85101 | 291 | ret = IRQ_HANDLED; |
036a4a7d | 292 | |
c7c85101 ZN |
293 | if (dev->primary->master) { |
294 | master_priv = dev->primary->master->driver_priv; | |
295 | if (master_priv->sarea_priv) | |
296 | master_priv->sarea_priv->last_dispatch = | |
297 | READ_BREADCRUMB(dev_priv); | |
298 | } | |
036a4a7d | 299 | |
c7c85101 ZN |
300 | if (gt_iir & GT_USER_INTERRUPT) { |
301 | u32 seqno = i915_get_gem_seqno(dev); | |
302 | dev_priv->mm.irq_gem_seqno = seqno; | |
303 | trace_i915_gem_request_complete(dev, seqno); | |
304 | DRM_WAKEUP(&dev_priv->irq_queue); | |
305 | dev_priv->hangcheck_count = 0; | |
306 | mod_timer(&dev_priv->hangcheck_timer, jiffies + DRM_I915_HANGCHECK_PERIOD); | |
307 | } | |
01c66889 | 308 | |
c7c85101 ZN |
309 | if (de_iir & DE_GSE) |
310 | ironlake_opregion_gse_intr(dev); | |
c650156a | 311 | |
c7c85101 ZN |
312 | /* check event from PCH */ |
313 | if ((de_iir & DE_PCH_EVENT) && | |
314 | (pch_iir & SDE_HOTPLUG_MASK)) { | |
315 | queue_work(dev_priv->wq, &dev_priv->hotplug_work); | |
036a4a7d ZW |
316 | } |
317 | ||
c7c85101 ZN |
318 | /* should clear PCH hotplug event before clear CPU irq */ |
319 | I915_WRITE(SDEIIR, pch_iir); | |
320 | I915_WRITE(GTIIR, gt_iir); | |
321 | I915_WRITE(DEIIR, de_iir); | |
322 | ||
323 | done: | |
2d109a84 ZN |
324 | I915_WRITE(DEIER, de_ier); |
325 | (void)I915_READ(DEIER); | |
326 | ||
036a4a7d ZW |
327 | return ret; |
328 | } | |
329 | ||
8a905236 JB |
330 | /** |
331 | * i915_error_work_func - do process context error handling work | |
332 | * @work: work struct | |
333 | * | |
334 | * Fire an error uevent so userspace can see that a hang or error | |
335 | * was detected. | |
336 | */ | |
337 | static void i915_error_work_func(struct work_struct *work) | |
338 | { | |
339 | drm_i915_private_t *dev_priv = container_of(work, drm_i915_private_t, | |
340 | error_work); | |
341 | struct drm_device *dev = dev_priv->dev; | |
f316a42c BG |
342 | char *error_event[] = { "ERROR=1", NULL }; |
343 | char *reset_event[] = { "RESET=1", NULL }; | |
344 | char *reset_done_event[] = { "ERROR=0", NULL }; | |
8a905236 | 345 | |
44d98a61 | 346 | DRM_DEBUG_DRIVER("generating error event\n"); |
f316a42c BG |
347 | kobject_uevent_env(&dev->primary->kdev.kobj, KOBJ_CHANGE, error_event); |
348 | ||
ba1234d1 | 349 | if (atomic_read(&dev_priv->mm.wedged)) { |
f316a42c | 350 | if (IS_I965G(dev)) { |
44d98a61 | 351 | DRM_DEBUG_DRIVER("resetting chip\n"); |
f316a42c BG |
352 | kobject_uevent_env(&dev->primary->kdev.kobj, KOBJ_CHANGE, reset_event); |
353 | if (!i965_reset(dev, GDRST_RENDER)) { | |
ba1234d1 | 354 | atomic_set(&dev_priv->mm.wedged, 0); |
f316a42c BG |
355 | kobject_uevent_env(&dev->primary->kdev.kobj, KOBJ_CHANGE, reset_done_event); |
356 | } | |
357 | } else { | |
44d98a61 | 358 | DRM_DEBUG_DRIVER("reboot required\n"); |
f316a42c BG |
359 | } |
360 | } | |
8a905236 JB |
361 | } |
362 | ||
363 | /** | |
364 | * i915_capture_error_state - capture an error record for later analysis | |
365 | * @dev: drm device | |
366 | * | |
367 | * Should be called when an error is detected (either a hang or an error | |
368 | * interrupt) to capture error state from the time of the error. Fills | |
369 | * out a structure which becomes available in debugfs for user level tools | |
370 | * to pick up. | |
371 | */ | |
63eeaf38 JB |
372 | static void i915_capture_error_state(struct drm_device *dev) |
373 | { | |
374 | struct drm_i915_private *dev_priv = dev->dev_private; | |
375 | struct drm_i915_error_state *error; | |
376 | unsigned long flags; | |
377 | ||
378 | spin_lock_irqsave(&dev_priv->error_lock, flags); | |
379 | if (dev_priv->first_error) | |
380 | goto out; | |
381 | ||
382 | error = kmalloc(sizeof(*error), GFP_ATOMIC); | |
383 | if (!error) { | |
44d98a61 | 384 | DRM_DEBUG_DRIVER("out ot memory, not capturing error state\n"); |
63eeaf38 JB |
385 | goto out; |
386 | } | |
387 | ||
388 | error->eir = I915_READ(EIR); | |
389 | error->pgtbl_er = I915_READ(PGTBL_ER); | |
390 | error->pipeastat = I915_READ(PIPEASTAT); | |
391 | error->pipebstat = I915_READ(PIPEBSTAT); | |
392 | error->instpm = I915_READ(INSTPM); | |
393 | if (!IS_I965G(dev)) { | |
394 | error->ipeir = I915_READ(IPEIR); | |
395 | error->ipehr = I915_READ(IPEHR); | |
396 | error->instdone = I915_READ(INSTDONE); | |
397 | error->acthd = I915_READ(ACTHD); | |
398 | } else { | |
399 | error->ipeir = I915_READ(IPEIR_I965); | |
400 | error->ipehr = I915_READ(IPEHR_I965); | |
401 | error->instdone = I915_READ(INSTDONE_I965); | |
402 | error->instps = I915_READ(INSTPS); | |
403 | error->instdone1 = I915_READ(INSTDONE1); | |
404 | error->acthd = I915_READ(ACTHD_I965); | |
405 | } | |
406 | ||
8a905236 JB |
407 | do_gettimeofday(&error->time); |
408 | ||
63eeaf38 JB |
409 | dev_priv->first_error = error; |
410 | ||
411 | out: | |
412 | spin_unlock_irqrestore(&dev_priv->error_lock, flags); | |
413 | } | |
414 | ||
8a905236 JB |
415 | /** |
416 | * i915_handle_error - handle an error interrupt | |
417 | * @dev: drm device | |
418 | * | |
419 | * Do some basic checking of regsiter state at error interrupt time and | |
420 | * dump it to the syslog. Also call i915_capture_error_state() to make | |
421 | * sure we get a record and make it available in debugfs. Fire a uevent | |
422 | * so userspace knows something bad happened (should trigger collection | |
423 | * of a ring dump etc.). | |
424 | */ | |
ba1234d1 | 425 | static void i915_handle_error(struct drm_device *dev, bool wedged) |
8a905236 JB |
426 | { |
427 | struct drm_i915_private *dev_priv = dev->dev_private; | |
428 | u32 eir = I915_READ(EIR); | |
429 | u32 pipea_stats = I915_READ(PIPEASTAT); | |
430 | u32 pipeb_stats = I915_READ(PIPEBSTAT); | |
431 | ||
432 | i915_capture_error_state(dev); | |
433 | ||
434 | printk(KERN_ERR "render error detected, EIR: 0x%08x\n", | |
435 | eir); | |
436 | ||
437 | if (IS_G4X(dev)) { | |
438 | if (eir & (GM45_ERROR_MEM_PRIV | GM45_ERROR_CP_PRIV)) { | |
439 | u32 ipeir = I915_READ(IPEIR_I965); | |
440 | ||
441 | printk(KERN_ERR " IPEIR: 0x%08x\n", | |
442 | I915_READ(IPEIR_I965)); | |
443 | printk(KERN_ERR " IPEHR: 0x%08x\n", | |
444 | I915_READ(IPEHR_I965)); | |
445 | printk(KERN_ERR " INSTDONE: 0x%08x\n", | |
446 | I915_READ(INSTDONE_I965)); | |
447 | printk(KERN_ERR " INSTPS: 0x%08x\n", | |
448 | I915_READ(INSTPS)); | |
449 | printk(KERN_ERR " INSTDONE1: 0x%08x\n", | |
450 | I915_READ(INSTDONE1)); | |
451 | printk(KERN_ERR " ACTHD: 0x%08x\n", | |
452 | I915_READ(ACTHD_I965)); | |
453 | I915_WRITE(IPEIR_I965, ipeir); | |
454 | (void)I915_READ(IPEIR_I965); | |
455 | } | |
456 | if (eir & GM45_ERROR_PAGE_TABLE) { | |
457 | u32 pgtbl_err = I915_READ(PGTBL_ER); | |
458 | printk(KERN_ERR "page table error\n"); | |
459 | printk(KERN_ERR " PGTBL_ER: 0x%08x\n", | |
460 | pgtbl_err); | |
461 | I915_WRITE(PGTBL_ER, pgtbl_err); | |
462 | (void)I915_READ(PGTBL_ER); | |
463 | } | |
464 | } | |
465 | ||
466 | if (IS_I9XX(dev)) { | |
467 | if (eir & I915_ERROR_PAGE_TABLE) { | |
468 | u32 pgtbl_err = I915_READ(PGTBL_ER); | |
469 | printk(KERN_ERR "page table error\n"); | |
470 | printk(KERN_ERR " PGTBL_ER: 0x%08x\n", | |
471 | pgtbl_err); | |
472 | I915_WRITE(PGTBL_ER, pgtbl_err); | |
473 | (void)I915_READ(PGTBL_ER); | |
474 | } | |
475 | } | |
476 | ||
477 | if (eir & I915_ERROR_MEMORY_REFRESH) { | |
478 | printk(KERN_ERR "memory refresh error\n"); | |
479 | printk(KERN_ERR "PIPEASTAT: 0x%08x\n", | |
480 | pipea_stats); | |
481 | printk(KERN_ERR "PIPEBSTAT: 0x%08x\n", | |
482 | pipeb_stats); | |
483 | /* pipestat has already been acked */ | |
484 | } | |
485 | if (eir & I915_ERROR_INSTRUCTION) { | |
486 | printk(KERN_ERR "instruction error\n"); | |
487 | printk(KERN_ERR " INSTPM: 0x%08x\n", | |
488 | I915_READ(INSTPM)); | |
489 | if (!IS_I965G(dev)) { | |
490 | u32 ipeir = I915_READ(IPEIR); | |
491 | ||
492 | printk(KERN_ERR " IPEIR: 0x%08x\n", | |
493 | I915_READ(IPEIR)); | |
494 | printk(KERN_ERR " IPEHR: 0x%08x\n", | |
495 | I915_READ(IPEHR)); | |
496 | printk(KERN_ERR " INSTDONE: 0x%08x\n", | |
497 | I915_READ(INSTDONE)); | |
498 | printk(KERN_ERR " ACTHD: 0x%08x\n", | |
499 | I915_READ(ACTHD)); | |
500 | I915_WRITE(IPEIR, ipeir); | |
501 | (void)I915_READ(IPEIR); | |
502 | } else { | |
503 | u32 ipeir = I915_READ(IPEIR_I965); | |
504 | ||
505 | printk(KERN_ERR " IPEIR: 0x%08x\n", | |
506 | I915_READ(IPEIR_I965)); | |
507 | printk(KERN_ERR " IPEHR: 0x%08x\n", | |
508 | I915_READ(IPEHR_I965)); | |
509 | printk(KERN_ERR " INSTDONE: 0x%08x\n", | |
510 | I915_READ(INSTDONE_I965)); | |
511 | printk(KERN_ERR " INSTPS: 0x%08x\n", | |
512 | I915_READ(INSTPS)); | |
513 | printk(KERN_ERR " INSTDONE1: 0x%08x\n", | |
514 | I915_READ(INSTDONE1)); | |
515 | printk(KERN_ERR " ACTHD: 0x%08x\n", | |
516 | I915_READ(ACTHD_I965)); | |
517 | I915_WRITE(IPEIR_I965, ipeir); | |
518 | (void)I915_READ(IPEIR_I965); | |
519 | } | |
520 | } | |
521 | ||
522 | I915_WRITE(EIR, eir); | |
523 | (void)I915_READ(EIR); | |
524 | eir = I915_READ(EIR); | |
525 | if (eir) { | |
526 | /* | |
527 | * some errors might have become stuck, | |
528 | * mask them. | |
529 | */ | |
530 | DRM_ERROR("EIR stuck: 0x%08x, masking\n", eir); | |
531 | I915_WRITE(EMR, I915_READ(EMR) | eir); | |
532 | I915_WRITE(IIR, I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT); | |
533 | } | |
534 | ||
ba1234d1 BG |
535 | if (wedged) { |
536 | atomic_set(&dev_priv->mm.wedged, 1); | |
537 | ||
11ed50ec BG |
538 | /* |
539 | * Wakeup waiting processes so they don't hang | |
540 | */ | |
11ed50ec BG |
541 | DRM_WAKEUP(&dev_priv->irq_queue); |
542 | } | |
543 | ||
9c9fe1f8 | 544 | queue_work(dev_priv->wq, &dev_priv->error_work); |
8a905236 JB |
545 | } |
546 | ||
1da177e4 LT |
547 | irqreturn_t i915_driver_irq_handler(DRM_IRQ_ARGS) |
548 | { | |
84b1fd10 | 549 | struct drm_device *dev = (struct drm_device *) arg; |
1da177e4 | 550 | drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; |
7c1c2871 | 551 | struct drm_i915_master_private *master_priv; |
cdfbc41f EA |
552 | u32 iir, new_iir; |
553 | u32 pipea_stats, pipeb_stats; | |
05eff845 KP |
554 | u32 vblank_status; |
555 | u32 vblank_enable; | |
0a3e67a4 | 556 | int vblank = 0; |
7c463586 | 557 | unsigned long irqflags; |
05eff845 KP |
558 | int irq_received; |
559 | int ret = IRQ_NONE; | |
6e5fca53 | 560 | |
630681d9 EA |
561 | atomic_inc(&dev_priv->irq_received); |
562 | ||
f2b115e6 AJ |
563 | if (IS_IRONLAKE(dev)) |
564 | return ironlake_irq_handler(dev); | |
036a4a7d | 565 | |
ed4cb414 | 566 | iir = I915_READ(IIR); |
a6b54f3f | 567 | |
05eff845 KP |
568 | if (IS_I965G(dev)) { |
569 | vblank_status = I915_START_VBLANK_INTERRUPT_STATUS; | |
570 | vblank_enable = PIPE_START_VBLANK_INTERRUPT_ENABLE; | |
571 | } else { | |
572 | vblank_status = I915_VBLANK_INTERRUPT_STATUS; | |
573 | vblank_enable = I915_VBLANK_INTERRUPT_ENABLE; | |
574 | } | |
af6061af | 575 | |
05eff845 KP |
576 | for (;;) { |
577 | irq_received = iir != 0; | |
578 | ||
579 | /* Can't rely on pipestat interrupt bit in iir as it might | |
580 | * have been cleared after the pipestat interrupt was received. | |
581 | * It doesn't set the bit in iir again, but it still produces | |
582 | * interrupts (for non-MSI). | |
583 | */ | |
584 | spin_lock_irqsave(&dev_priv->user_irq_lock, irqflags); | |
585 | pipea_stats = I915_READ(PIPEASTAT); | |
586 | pipeb_stats = I915_READ(PIPEBSTAT); | |
79e53945 | 587 | |
8a905236 | 588 | if (iir & I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT) |
ba1234d1 | 589 | i915_handle_error(dev, false); |
8a905236 | 590 | |
cdfbc41f EA |
591 | /* |
592 | * Clear the PIPE(A|B)STAT regs before the IIR | |
593 | */ | |
05eff845 | 594 | if (pipea_stats & 0x8000ffff) { |
7662c8bd | 595 | if (pipea_stats & PIPE_FIFO_UNDERRUN_STATUS) |
44d98a61 | 596 | DRM_DEBUG_DRIVER("pipe a underrun\n"); |
cdfbc41f | 597 | I915_WRITE(PIPEASTAT, pipea_stats); |
05eff845 | 598 | irq_received = 1; |
cdfbc41f | 599 | } |
1da177e4 | 600 | |
05eff845 | 601 | if (pipeb_stats & 0x8000ffff) { |
7662c8bd | 602 | if (pipeb_stats & PIPE_FIFO_UNDERRUN_STATUS) |
44d98a61 | 603 | DRM_DEBUG_DRIVER("pipe b underrun\n"); |
cdfbc41f | 604 | I915_WRITE(PIPEBSTAT, pipeb_stats); |
05eff845 | 605 | irq_received = 1; |
cdfbc41f | 606 | } |
05eff845 KP |
607 | spin_unlock_irqrestore(&dev_priv->user_irq_lock, irqflags); |
608 | ||
609 | if (!irq_received) | |
610 | break; | |
611 | ||
612 | ret = IRQ_HANDLED; | |
8ee1c3db | 613 | |
5ca58282 JB |
614 | /* Consume port. Then clear IIR or we'll miss events */ |
615 | if ((I915_HAS_HOTPLUG(dev)) && | |
616 | (iir & I915_DISPLAY_PORT_INTERRUPT)) { | |
617 | u32 hotplug_status = I915_READ(PORT_HOTPLUG_STAT); | |
618 | ||
44d98a61 | 619 | DRM_DEBUG_DRIVER("hotplug event received, stat 0x%08x\n", |
5ca58282 JB |
620 | hotplug_status); |
621 | if (hotplug_status & dev_priv->hotplug_supported_mask) | |
9c9fe1f8 EA |
622 | queue_work(dev_priv->wq, |
623 | &dev_priv->hotplug_work); | |
5ca58282 JB |
624 | |
625 | I915_WRITE(PORT_HOTPLUG_STAT, hotplug_status); | |
626 | I915_READ(PORT_HOTPLUG_STAT); | |
627 | } | |
628 | ||
cdfbc41f EA |
629 | I915_WRITE(IIR, iir); |
630 | new_iir = I915_READ(IIR); /* Flush posted writes */ | |
7c463586 | 631 | |
7c1c2871 DA |
632 | if (dev->primary->master) { |
633 | master_priv = dev->primary->master->driver_priv; | |
634 | if (master_priv->sarea_priv) | |
635 | master_priv->sarea_priv->last_dispatch = | |
636 | READ_BREADCRUMB(dev_priv); | |
637 | } | |
0a3e67a4 | 638 | |
cdfbc41f | 639 | if (iir & I915_USER_INTERRUPT) { |
1c5d22f7 CW |
640 | u32 seqno = i915_get_gem_seqno(dev); |
641 | dev_priv->mm.irq_gem_seqno = seqno; | |
642 | trace_i915_gem_request_complete(dev, seqno); | |
cdfbc41f | 643 | DRM_WAKEUP(&dev_priv->irq_queue); |
f65d9421 BG |
644 | dev_priv->hangcheck_count = 0; |
645 | mod_timer(&dev_priv->hangcheck_timer, jiffies + DRM_I915_HANGCHECK_PERIOD); | |
cdfbc41f | 646 | } |
673a394b | 647 | |
6b95a207 KH |
648 | if (iir & I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT) |
649 | intel_prepare_page_flip(dev, 0); | |
650 | ||
651 | if (iir & I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT) | |
652 | intel_prepare_page_flip(dev, 1); | |
653 | ||
05eff845 | 654 | if (pipea_stats & vblank_status) { |
cdfbc41f EA |
655 | vblank++; |
656 | drm_handle_vblank(dev, 0); | |
6b95a207 | 657 | intel_finish_page_flip(dev, 0); |
cdfbc41f | 658 | } |
7c463586 | 659 | |
05eff845 | 660 | if (pipeb_stats & vblank_status) { |
cdfbc41f EA |
661 | vblank++; |
662 | drm_handle_vblank(dev, 1); | |
6b95a207 | 663 | intel_finish_page_flip(dev, 1); |
cdfbc41f | 664 | } |
7c463586 | 665 | |
cdfbc41f EA |
666 | if ((pipeb_stats & I915_LEGACY_BLC_EVENT_STATUS) || |
667 | (iir & I915_ASLE_INTERRUPT)) | |
668 | opregion_asle_intr(dev); | |
669 | ||
670 | /* With MSI, interrupts are only generated when iir | |
671 | * transitions from zero to nonzero. If another bit got | |
672 | * set while we were handling the existing iir bits, then | |
673 | * we would never get another interrupt. | |
674 | * | |
675 | * This is fine on non-MSI as well, as if we hit this path | |
676 | * we avoid exiting the interrupt handler only to generate | |
677 | * another one. | |
678 | * | |
679 | * Note that for MSI this could cause a stray interrupt report | |
680 | * if an interrupt landed in the time between writing IIR and | |
681 | * the posting read. This should be rare enough to never | |
682 | * trigger the 99% of 100,000 interrupts test for disabling | |
683 | * stray interrupts. | |
684 | */ | |
685 | iir = new_iir; | |
05eff845 | 686 | } |
0a3e67a4 | 687 | |
05eff845 | 688 | return ret; |
1da177e4 LT |
689 | } |
690 | ||
af6061af | 691 | static int i915_emit_irq(struct drm_device * dev) |
1da177e4 LT |
692 | { |
693 | drm_i915_private_t *dev_priv = dev->dev_private; | |
7c1c2871 | 694 | struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv; |
1da177e4 LT |
695 | RING_LOCALS; |
696 | ||
697 | i915_kernel_lost_context(dev); | |
698 | ||
44d98a61 | 699 | DRM_DEBUG_DRIVER("\n"); |
1da177e4 | 700 | |
c99b058f | 701 | dev_priv->counter++; |
c29b669c | 702 | if (dev_priv->counter > 0x7FFFFFFFUL) |
c99b058f | 703 | dev_priv->counter = 1; |
7c1c2871 DA |
704 | if (master_priv->sarea_priv) |
705 | master_priv->sarea_priv->last_enqueue = dev_priv->counter; | |
c29b669c | 706 | |
0baf823a | 707 | BEGIN_LP_RING(4); |
585fb111 | 708 | OUT_RING(MI_STORE_DWORD_INDEX); |
0baf823a | 709 | OUT_RING(I915_BREADCRUMB_INDEX << MI_STORE_DWORD_INDEX_SHIFT); |
c29b669c | 710 | OUT_RING(dev_priv->counter); |
585fb111 | 711 | OUT_RING(MI_USER_INTERRUPT); |
1da177e4 | 712 | ADVANCE_LP_RING(); |
bc5f4523 | 713 | |
c29b669c | 714 | return dev_priv->counter; |
1da177e4 LT |
715 | } |
716 | ||
673a394b | 717 | void i915_user_irq_get(struct drm_device *dev) |
ed4cb414 EA |
718 | { |
719 | drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; | |
e9d21d7f | 720 | unsigned long irqflags; |
ed4cb414 | 721 | |
e9d21d7f | 722 | spin_lock_irqsave(&dev_priv->user_irq_lock, irqflags); |
036a4a7d | 723 | if (dev->irq_enabled && (++dev_priv->user_irq_refcount == 1)) { |
f2b115e6 AJ |
724 | if (IS_IRONLAKE(dev)) |
725 | ironlake_enable_graphics_irq(dev_priv, GT_USER_INTERRUPT); | |
036a4a7d ZW |
726 | else |
727 | i915_enable_irq(dev_priv, I915_USER_INTERRUPT); | |
728 | } | |
e9d21d7f | 729 | spin_unlock_irqrestore(&dev_priv->user_irq_lock, irqflags); |
ed4cb414 EA |
730 | } |
731 | ||
0a3e67a4 | 732 | void i915_user_irq_put(struct drm_device *dev) |
ed4cb414 EA |
733 | { |
734 | drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; | |
e9d21d7f | 735 | unsigned long irqflags; |
ed4cb414 | 736 | |
e9d21d7f | 737 | spin_lock_irqsave(&dev_priv->user_irq_lock, irqflags); |
ed4cb414 | 738 | BUG_ON(dev->irq_enabled && dev_priv->user_irq_refcount <= 0); |
036a4a7d | 739 | if (dev->irq_enabled && (--dev_priv->user_irq_refcount == 0)) { |
f2b115e6 AJ |
740 | if (IS_IRONLAKE(dev)) |
741 | ironlake_disable_graphics_irq(dev_priv, GT_USER_INTERRUPT); | |
036a4a7d ZW |
742 | else |
743 | i915_disable_irq(dev_priv, I915_USER_INTERRUPT); | |
744 | } | |
e9d21d7f | 745 | spin_unlock_irqrestore(&dev_priv->user_irq_lock, irqflags); |
ed4cb414 EA |
746 | } |
747 | ||
9d34e5db CW |
748 | void i915_trace_irq_get(struct drm_device *dev, u32 seqno) |
749 | { | |
750 | drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; | |
751 | ||
752 | if (dev_priv->trace_irq_seqno == 0) | |
753 | i915_user_irq_get(dev); | |
754 | ||
755 | dev_priv->trace_irq_seqno = seqno; | |
756 | } | |
757 | ||
84b1fd10 | 758 | static int i915_wait_irq(struct drm_device * dev, int irq_nr) |
1da177e4 LT |
759 | { |
760 | drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; | |
7c1c2871 | 761 | struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv; |
1da177e4 LT |
762 | int ret = 0; |
763 | ||
44d98a61 | 764 | DRM_DEBUG_DRIVER("irq_nr=%d breadcrumb=%d\n", irq_nr, |
1da177e4 LT |
765 | READ_BREADCRUMB(dev_priv)); |
766 | ||
ed4cb414 | 767 | if (READ_BREADCRUMB(dev_priv) >= irq_nr) { |
7c1c2871 DA |
768 | if (master_priv->sarea_priv) |
769 | master_priv->sarea_priv->last_dispatch = READ_BREADCRUMB(dev_priv); | |
1da177e4 | 770 | return 0; |
ed4cb414 | 771 | } |
1da177e4 | 772 | |
7c1c2871 DA |
773 | if (master_priv->sarea_priv) |
774 | master_priv->sarea_priv->perf_boxes |= I915_BOX_WAIT; | |
1da177e4 | 775 | |
ed4cb414 | 776 | i915_user_irq_get(dev); |
1da177e4 LT |
777 | DRM_WAIT_ON(ret, dev_priv->irq_queue, 3 * DRM_HZ, |
778 | READ_BREADCRUMB(dev_priv) >= irq_nr); | |
ed4cb414 | 779 | i915_user_irq_put(dev); |
1da177e4 | 780 | |
20caafa6 | 781 | if (ret == -EBUSY) { |
3e684eae | 782 | DRM_ERROR("EBUSY -- rec: %d emitted: %d\n", |
1da177e4 LT |
783 | READ_BREADCRUMB(dev_priv), (int)dev_priv->counter); |
784 | } | |
785 | ||
af6061af DA |
786 | return ret; |
787 | } | |
788 | ||
1da177e4 LT |
789 | /* Needs the lock as it touches the ring. |
790 | */ | |
c153f45f EA |
791 | int i915_irq_emit(struct drm_device *dev, void *data, |
792 | struct drm_file *file_priv) | |
1da177e4 | 793 | { |
1da177e4 | 794 | drm_i915_private_t *dev_priv = dev->dev_private; |
c153f45f | 795 | drm_i915_irq_emit_t *emit = data; |
1da177e4 LT |
796 | int result; |
797 | ||
07f4f8bf | 798 | if (!dev_priv || !dev_priv->ring.virtual_start) { |
3e684eae | 799 | DRM_ERROR("called with no initialization\n"); |
20caafa6 | 800 | return -EINVAL; |
1da177e4 | 801 | } |
299eb93c EA |
802 | |
803 | RING_LOCK_TEST_WITH_RETURN(dev, file_priv); | |
804 | ||
546b0974 | 805 | mutex_lock(&dev->struct_mutex); |
1da177e4 | 806 | result = i915_emit_irq(dev); |
546b0974 | 807 | mutex_unlock(&dev->struct_mutex); |
1da177e4 | 808 | |
c153f45f | 809 | if (DRM_COPY_TO_USER(emit->irq_seq, &result, sizeof(int))) { |
1da177e4 | 810 | DRM_ERROR("copy_to_user\n"); |
20caafa6 | 811 | return -EFAULT; |
1da177e4 LT |
812 | } |
813 | ||
814 | return 0; | |
815 | } | |
816 | ||
817 | /* Doesn't need the hardware lock. | |
818 | */ | |
c153f45f EA |
819 | int i915_irq_wait(struct drm_device *dev, void *data, |
820 | struct drm_file *file_priv) | |
1da177e4 | 821 | { |
1da177e4 | 822 | drm_i915_private_t *dev_priv = dev->dev_private; |
c153f45f | 823 | drm_i915_irq_wait_t *irqwait = data; |
1da177e4 LT |
824 | |
825 | if (!dev_priv) { | |
3e684eae | 826 | DRM_ERROR("called with no initialization\n"); |
20caafa6 | 827 | return -EINVAL; |
1da177e4 LT |
828 | } |
829 | ||
c153f45f | 830 | return i915_wait_irq(dev, irqwait->irq_seq); |
1da177e4 LT |
831 | } |
832 | ||
42f52ef8 KP |
833 | /* Called from drm generic code, passed 'crtc' which |
834 | * we use as a pipe index | |
835 | */ | |
836 | int i915_enable_vblank(struct drm_device *dev, int pipe) | |
0a3e67a4 JB |
837 | { |
838 | drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; | |
e9d21d7f | 839 | unsigned long irqflags; |
71e0ffa5 JB |
840 | int pipeconf_reg = (pipe == 0) ? PIPEACONF : PIPEBCONF; |
841 | u32 pipeconf; | |
842 | ||
843 | pipeconf = I915_READ(pipeconf_reg); | |
844 | if (!(pipeconf & PIPEACONF_ENABLE)) | |
845 | return -EINVAL; | |
0a3e67a4 | 846 | |
f2b115e6 | 847 | if (IS_IRONLAKE(dev)) |
036a4a7d ZW |
848 | return 0; |
849 | ||
e9d21d7f | 850 | spin_lock_irqsave(&dev_priv->user_irq_lock, irqflags); |
e9d21d7f | 851 | if (IS_I965G(dev)) |
7c463586 KP |
852 | i915_enable_pipestat(dev_priv, pipe, |
853 | PIPE_START_VBLANK_INTERRUPT_ENABLE); | |
e9d21d7f | 854 | else |
7c463586 KP |
855 | i915_enable_pipestat(dev_priv, pipe, |
856 | PIPE_VBLANK_INTERRUPT_ENABLE); | |
e9d21d7f | 857 | spin_unlock_irqrestore(&dev_priv->user_irq_lock, irqflags); |
0a3e67a4 JB |
858 | return 0; |
859 | } | |
860 | ||
42f52ef8 KP |
861 | /* Called from drm generic code, passed 'crtc' which |
862 | * we use as a pipe index | |
863 | */ | |
864 | void i915_disable_vblank(struct drm_device *dev, int pipe) | |
0a3e67a4 JB |
865 | { |
866 | drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; | |
e9d21d7f | 867 | unsigned long irqflags; |
0a3e67a4 | 868 | |
f2b115e6 | 869 | if (IS_IRONLAKE(dev)) |
036a4a7d ZW |
870 | return; |
871 | ||
e9d21d7f | 872 | spin_lock_irqsave(&dev_priv->user_irq_lock, irqflags); |
7c463586 KP |
873 | i915_disable_pipestat(dev_priv, pipe, |
874 | PIPE_VBLANK_INTERRUPT_ENABLE | | |
875 | PIPE_START_VBLANK_INTERRUPT_ENABLE); | |
e9d21d7f | 876 | spin_unlock_irqrestore(&dev_priv->user_irq_lock, irqflags); |
0a3e67a4 JB |
877 | } |
878 | ||
79e53945 JB |
879 | void i915_enable_interrupt (struct drm_device *dev) |
880 | { | |
881 | struct drm_i915_private *dev_priv = dev->dev_private; | |
e170b030 | 882 | |
f2b115e6 | 883 | if (!IS_IRONLAKE(dev)) |
e170b030 | 884 | opregion_enable_asle(dev); |
79e53945 JB |
885 | dev_priv->irq_enabled = 1; |
886 | } | |
887 | ||
888 | ||
702880f2 DA |
889 | /* Set the vblank monitor pipe |
890 | */ | |
c153f45f EA |
891 | int i915_vblank_pipe_set(struct drm_device *dev, void *data, |
892 | struct drm_file *file_priv) | |
702880f2 | 893 | { |
702880f2 | 894 | drm_i915_private_t *dev_priv = dev->dev_private; |
702880f2 DA |
895 | |
896 | if (!dev_priv) { | |
3e684eae | 897 | DRM_ERROR("called with no initialization\n"); |
20caafa6 | 898 | return -EINVAL; |
702880f2 DA |
899 | } |
900 | ||
5b51694a | 901 | return 0; |
702880f2 DA |
902 | } |
903 | ||
c153f45f EA |
904 | int i915_vblank_pipe_get(struct drm_device *dev, void *data, |
905 | struct drm_file *file_priv) | |
702880f2 | 906 | { |
702880f2 | 907 | drm_i915_private_t *dev_priv = dev->dev_private; |
c153f45f | 908 | drm_i915_vblank_pipe_t *pipe = data; |
702880f2 DA |
909 | |
910 | if (!dev_priv) { | |
3e684eae | 911 | DRM_ERROR("called with no initialization\n"); |
20caafa6 | 912 | return -EINVAL; |
702880f2 DA |
913 | } |
914 | ||
0a3e67a4 | 915 | pipe->pipe = DRM_I915_VBLANK_PIPE_A | DRM_I915_VBLANK_PIPE_B; |
c153f45f | 916 | |
702880f2 DA |
917 | return 0; |
918 | } | |
919 | ||
a6b54f3f MCA |
920 | /** |
921 | * Schedule buffer swap at given vertical blank. | |
922 | */ | |
c153f45f EA |
923 | int i915_vblank_swap(struct drm_device *dev, void *data, |
924 | struct drm_file *file_priv) | |
a6b54f3f | 925 | { |
bd95e0a4 EA |
926 | /* The delayed swap mechanism was fundamentally racy, and has been |
927 | * removed. The model was that the client requested a delayed flip/swap | |
928 | * from the kernel, then waited for vblank before continuing to perform | |
929 | * rendering. The problem was that the kernel might wake the client | |
930 | * up before it dispatched the vblank swap (since the lock has to be | |
931 | * held while touching the ringbuffer), in which case the client would | |
932 | * clear and start the next frame before the swap occurred, and | |
933 | * flicker would occur in addition to likely missing the vblank. | |
934 | * | |
935 | * In the absence of this ioctl, userland falls back to a correct path | |
936 | * of waiting for a vblank, then dispatching the swap on its own. | |
937 | * Context switching to userland and back is plenty fast enough for | |
938 | * meeting the requirements of vblank swapping. | |
0a3e67a4 | 939 | */ |
bd95e0a4 | 940 | return -EINVAL; |
a6b54f3f MCA |
941 | } |
942 | ||
f65d9421 BG |
943 | struct drm_i915_gem_request *i915_get_tail_request(struct drm_device *dev) { |
944 | drm_i915_private_t *dev_priv = dev->dev_private; | |
945 | return list_entry(dev_priv->mm.request_list.prev, struct drm_i915_gem_request, list); | |
946 | } | |
947 | ||
948 | /** | |
949 | * This is called when the chip hasn't reported back with completed | |
950 | * batchbuffers in a long time. The first time this is called we simply record | |
951 | * ACTHD. If ACTHD hasn't changed by the time the hangcheck timer elapses | |
952 | * again, we assume the chip is wedged and try to fix it. | |
953 | */ | |
954 | void i915_hangcheck_elapsed(unsigned long data) | |
955 | { | |
956 | struct drm_device *dev = (struct drm_device *)data; | |
957 | drm_i915_private_t *dev_priv = dev->dev_private; | |
958 | uint32_t acthd; | |
959 | ||
960 | if (!IS_I965G(dev)) | |
961 | acthd = I915_READ(ACTHD); | |
962 | else | |
963 | acthd = I915_READ(ACTHD_I965); | |
964 | ||
965 | /* If all work is done then ACTHD clearly hasn't advanced. */ | |
966 | if (list_empty(&dev_priv->mm.request_list) || | |
967 | i915_seqno_passed(i915_get_gem_seqno(dev), i915_get_tail_request(dev)->seqno)) { | |
968 | dev_priv->hangcheck_count = 0; | |
969 | return; | |
970 | } | |
971 | ||
972 | if (dev_priv->last_acthd == acthd && dev_priv->hangcheck_count > 0) { | |
973 | DRM_ERROR("Hangcheck timer elapsed... GPU hung\n"); | |
ba1234d1 | 974 | i915_handle_error(dev, true); |
f65d9421 BG |
975 | return; |
976 | } | |
977 | ||
978 | /* Reset timer case chip hangs without another request being added */ | |
979 | mod_timer(&dev_priv->hangcheck_timer, jiffies + DRM_I915_HANGCHECK_PERIOD); | |
980 | ||
981 | if (acthd != dev_priv->last_acthd) | |
982 | dev_priv->hangcheck_count = 0; | |
983 | else | |
984 | dev_priv->hangcheck_count++; | |
985 | ||
986 | dev_priv->last_acthd = acthd; | |
987 | } | |
988 | ||
1da177e4 LT |
989 | /* drm_dma.h hooks |
990 | */ | |
f2b115e6 | 991 | static void ironlake_irq_preinstall(struct drm_device *dev) |
036a4a7d ZW |
992 | { |
993 | drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; | |
994 | ||
995 | I915_WRITE(HWSTAM, 0xeffe); | |
996 | ||
997 | /* XXX hotplug from PCH */ | |
998 | ||
999 | I915_WRITE(DEIMR, 0xffffffff); | |
1000 | I915_WRITE(DEIER, 0x0); | |
1001 | (void) I915_READ(DEIER); | |
1002 | ||
1003 | /* and GT */ | |
1004 | I915_WRITE(GTIMR, 0xffffffff); | |
1005 | I915_WRITE(GTIER, 0x0); | |
1006 | (void) I915_READ(GTIER); | |
c650156a ZW |
1007 | |
1008 | /* south display irq */ | |
1009 | I915_WRITE(SDEIMR, 0xffffffff); | |
1010 | I915_WRITE(SDEIER, 0x0); | |
1011 | (void) I915_READ(SDEIER); | |
036a4a7d ZW |
1012 | } |
1013 | ||
f2b115e6 | 1014 | static int ironlake_irq_postinstall(struct drm_device *dev) |
036a4a7d ZW |
1015 | { |
1016 | drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; | |
1017 | /* enable kind of interrupts always enabled */ | |
c650156a | 1018 | u32 display_mask = DE_MASTER_IRQ_CONTROL | DE_GSE | DE_PCH_EVENT; |
036a4a7d | 1019 | u32 render_mask = GT_USER_INTERRUPT; |
c650156a ZW |
1020 | u32 hotplug_mask = SDE_CRT_HOTPLUG | SDE_PORTB_HOTPLUG | |
1021 | SDE_PORTC_HOTPLUG | SDE_PORTD_HOTPLUG; | |
036a4a7d ZW |
1022 | |
1023 | dev_priv->irq_mask_reg = ~display_mask; | |
1024 | dev_priv->de_irq_enable_reg = display_mask; | |
1025 | ||
1026 | /* should always can generate irq */ | |
1027 | I915_WRITE(DEIIR, I915_READ(DEIIR)); | |
1028 | I915_WRITE(DEIMR, dev_priv->irq_mask_reg); | |
1029 | I915_WRITE(DEIER, dev_priv->de_irq_enable_reg); | |
1030 | (void) I915_READ(DEIER); | |
1031 | ||
1032 | /* user interrupt should be enabled, but masked initial */ | |
1033 | dev_priv->gt_irq_mask_reg = 0xffffffff; | |
1034 | dev_priv->gt_irq_enable_reg = render_mask; | |
1035 | ||
1036 | I915_WRITE(GTIIR, I915_READ(GTIIR)); | |
1037 | I915_WRITE(GTIMR, dev_priv->gt_irq_mask_reg); | |
1038 | I915_WRITE(GTIER, dev_priv->gt_irq_enable_reg); | |
1039 | (void) I915_READ(GTIER); | |
1040 | ||
c650156a ZW |
1041 | dev_priv->pch_irq_mask_reg = ~hotplug_mask; |
1042 | dev_priv->pch_irq_enable_reg = hotplug_mask; | |
1043 | ||
1044 | I915_WRITE(SDEIIR, I915_READ(SDEIIR)); | |
1045 | I915_WRITE(SDEIMR, dev_priv->pch_irq_mask_reg); | |
1046 | I915_WRITE(SDEIER, dev_priv->pch_irq_enable_reg); | |
1047 | (void) I915_READ(SDEIER); | |
1048 | ||
036a4a7d ZW |
1049 | return 0; |
1050 | } | |
1051 | ||
84b1fd10 | 1052 | void i915_driver_irq_preinstall(struct drm_device * dev) |
1da177e4 LT |
1053 | { |
1054 | drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; | |
1055 | ||
79e53945 JB |
1056 | atomic_set(&dev_priv->irq_received, 0); |
1057 | ||
036a4a7d | 1058 | INIT_WORK(&dev_priv->hotplug_work, i915_hotplug_work_func); |
8a905236 | 1059 | INIT_WORK(&dev_priv->error_work, i915_error_work_func); |
036a4a7d | 1060 | |
f2b115e6 AJ |
1061 | if (IS_IRONLAKE(dev)) { |
1062 | ironlake_irq_preinstall(dev); | |
036a4a7d ZW |
1063 | return; |
1064 | } | |
1065 | ||
5ca58282 JB |
1066 | if (I915_HAS_HOTPLUG(dev)) { |
1067 | I915_WRITE(PORT_HOTPLUG_EN, 0); | |
1068 | I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT)); | |
1069 | } | |
1070 | ||
0a3e67a4 | 1071 | I915_WRITE(HWSTAM, 0xeffe); |
7c463586 KP |
1072 | I915_WRITE(PIPEASTAT, 0); |
1073 | I915_WRITE(PIPEBSTAT, 0); | |
0a3e67a4 | 1074 | I915_WRITE(IMR, 0xffffffff); |
ed4cb414 | 1075 | I915_WRITE(IER, 0x0); |
7c463586 | 1076 | (void) I915_READ(IER); |
1da177e4 LT |
1077 | } |
1078 | ||
b01f2c3a JB |
1079 | /* |
1080 | * Must be called after intel_modeset_init or hotplug interrupts won't be | |
1081 | * enabled correctly. | |
1082 | */ | |
0a3e67a4 | 1083 | int i915_driver_irq_postinstall(struct drm_device *dev) |
1da177e4 LT |
1084 | { |
1085 | drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; | |
5ca58282 | 1086 | u32 enable_mask = I915_INTERRUPT_ENABLE_FIX | I915_INTERRUPT_ENABLE_VAR; |
63eeaf38 | 1087 | u32 error_mask; |
0a3e67a4 | 1088 | |
036a4a7d ZW |
1089 | DRM_INIT_WAITQUEUE(&dev_priv->irq_queue); |
1090 | ||
0a3e67a4 | 1091 | dev_priv->vblank_pipe = DRM_I915_VBLANK_PIPE_A | DRM_I915_VBLANK_PIPE_B; |
0a3e67a4 | 1092 | |
f2b115e6 AJ |
1093 | if (IS_IRONLAKE(dev)) |
1094 | return ironlake_irq_postinstall(dev); | |
036a4a7d | 1095 | |
7c463586 KP |
1096 | /* Unmask the interrupts that we always want on. */ |
1097 | dev_priv->irq_mask_reg = ~I915_INTERRUPT_ENABLE_FIX; | |
1098 | ||
1099 | dev_priv->pipestat[0] = 0; | |
1100 | dev_priv->pipestat[1] = 0; | |
1101 | ||
5ca58282 JB |
1102 | if (I915_HAS_HOTPLUG(dev)) { |
1103 | u32 hotplug_en = I915_READ(PORT_HOTPLUG_EN); | |
1104 | ||
b01f2c3a JB |
1105 | /* Note HDMI and DP share bits */ |
1106 | if (dev_priv->hotplug_supported_mask & HDMIB_HOTPLUG_INT_STATUS) | |
1107 | hotplug_en |= HDMIB_HOTPLUG_INT_EN; | |
1108 | if (dev_priv->hotplug_supported_mask & HDMIC_HOTPLUG_INT_STATUS) | |
1109 | hotplug_en |= HDMIC_HOTPLUG_INT_EN; | |
1110 | if (dev_priv->hotplug_supported_mask & HDMID_HOTPLUG_INT_STATUS) | |
1111 | hotplug_en |= HDMID_HOTPLUG_INT_EN; | |
1112 | if (dev_priv->hotplug_supported_mask & SDVOC_HOTPLUG_INT_STATUS) | |
1113 | hotplug_en |= SDVOC_HOTPLUG_INT_EN; | |
1114 | if (dev_priv->hotplug_supported_mask & SDVOB_HOTPLUG_INT_STATUS) | |
1115 | hotplug_en |= SDVOB_HOTPLUG_INT_EN; | |
1116 | if (dev_priv->hotplug_supported_mask & CRT_HOTPLUG_INT_STATUS) | |
1117 | hotplug_en |= CRT_HOTPLUG_INT_EN; | |
1118 | /* Ignore TV since it's buggy */ | |
1119 | ||
5ca58282 JB |
1120 | I915_WRITE(PORT_HOTPLUG_EN, hotplug_en); |
1121 | ||
5ca58282 JB |
1122 | /* Enable in IER... */ |
1123 | enable_mask |= I915_DISPLAY_PORT_INTERRUPT; | |
1124 | /* and unmask in IMR */ | |
1125 | i915_enable_irq(dev_priv, I915_DISPLAY_PORT_INTERRUPT); | |
1126 | } | |
1127 | ||
63eeaf38 JB |
1128 | /* |
1129 | * Enable some error detection, note the instruction error mask | |
1130 | * bit is reserved, so we leave it masked. | |
1131 | */ | |
1132 | if (IS_G4X(dev)) { | |
1133 | error_mask = ~(GM45_ERROR_PAGE_TABLE | | |
1134 | GM45_ERROR_MEM_PRIV | | |
1135 | GM45_ERROR_CP_PRIV | | |
1136 | I915_ERROR_MEMORY_REFRESH); | |
1137 | } else { | |
1138 | error_mask = ~(I915_ERROR_PAGE_TABLE | | |
1139 | I915_ERROR_MEMORY_REFRESH); | |
1140 | } | |
1141 | I915_WRITE(EMR, error_mask); | |
1142 | ||
7c463586 KP |
1143 | /* Disable pipe interrupt enables, clear pending pipe status */ |
1144 | I915_WRITE(PIPEASTAT, I915_READ(PIPEASTAT) & 0x8000ffff); | |
1145 | I915_WRITE(PIPEBSTAT, I915_READ(PIPEBSTAT) & 0x8000ffff); | |
1146 | /* Clear pending interrupt status */ | |
1147 | I915_WRITE(IIR, I915_READ(IIR)); | |
8ee1c3db | 1148 | |
5ca58282 | 1149 | I915_WRITE(IER, enable_mask); |
7c463586 | 1150 | I915_WRITE(IMR, dev_priv->irq_mask_reg); |
ed4cb414 EA |
1151 | (void) I915_READ(IER); |
1152 | ||
8ee1c3db | 1153 | opregion_enable_asle(dev); |
0a3e67a4 JB |
1154 | |
1155 | return 0; | |
1da177e4 LT |
1156 | } |
1157 | ||
f2b115e6 | 1158 | static void ironlake_irq_uninstall(struct drm_device *dev) |
036a4a7d ZW |
1159 | { |
1160 | drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; | |
1161 | I915_WRITE(HWSTAM, 0xffffffff); | |
1162 | ||
1163 | I915_WRITE(DEIMR, 0xffffffff); | |
1164 | I915_WRITE(DEIER, 0x0); | |
1165 | I915_WRITE(DEIIR, I915_READ(DEIIR)); | |
1166 | ||
1167 | I915_WRITE(GTIMR, 0xffffffff); | |
1168 | I915_WRITE(GTIER, 0x0); | |
1169 | I915_WRITE(GTIIR, I915_READ(GTIIR)); | |
1170 | } | |
1171 | ||
84b1fd10 | 1172 | void i915_driver_irq_uninstall(struct drm_device * dev) |
1da177e4 LT |
1173 | { |
1174 | drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; | |
91e3738e | 1175 | |
1da177e4 LT |
1176 | if (!dev_priv) |
1177 | return; | |
1178 | ||
0a3e67a4 JB |
1179 | dev_priv->vblank_pipe = 0; |
1180 | ||
f2b115e6 AJ |
1181 | if (IS_IRONLAKE(dev)) { |
1182 | ironlake_irq_uninstall(dev); | |
036a4a7d ZW |
1183 | return; |
1184 | } | |
1185 | ||
5ca58282 JB |
1186 | if (I915_HAS_HOTPLUG(dev)) { |
1187 | I915_WRITE(PORT_HOTPLUG_EN, 0); | |
1188 | I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT)); | |
1189 | } | |
1190 | ||
0a3e67a4 | 1191 | I915_WRITE(HWSTAM, 0xffffffff); |
7c463586 KP |
1192 | I915_WRITE(PIPEASTAT, 0); |
1193 | I915_WRITE(PIPEBSTAT, 0); | |
0a3e67a4 | 1194 | I915_WRITE(IMR, 0xffffffff); |
ed4cb414 | 1195 | I915_WRITE(IER, 0x0); |
af6061af | 1196 | |
7c463586 KP |
1197 | I915_WRITE(PIPEASTAT, I915_READ(PIPEASTAT) & 0x8000ffff); |
1198 | I915_WRITE(PIPEBSTAT, I915_READ(PIPEBSTAT) & 0x8000ffff); | |
1199 | I915_WRITE(IIR, I915_READ(IIR)); | |
1da177e4 | 1200 | } |