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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 LT |
28 | |
29 | #include "drmP.h" | |
30 | #include "drm.h" | |
31 | #include "i915_drm.h" | |
32 | #include "i915_drv.h" | |
79e53945 | 33 | #include "intel_drv.h" |
1da177e4 | 34 | |
1da177e4 | 35 | #define MAX_NOPID ((u32)~0) |
1da177e4 | 36 | |
7c463586 KP |
37 | /** |
38 | * Interrupts that are always left unmasked. | |
39 | * | |
40 | * Since pipe events are edge-triggered from the PIPESTAT register to IIR, | |
41 | * we leave them always unmasked in IMR and then control enabling them through | |
42 | * PIPESTAT alone. | |
43 | */ | |
44 | #define I915_INTERRUPT_ENABLE_FIX (I915_ASLE_INTERRUPT | \ | |
45 | I915_DISPLAY_PIPE_A_EVENT_INTERRUPT | \ | |
46 | I915_DISPLAY_PIPE_B_EVENT_INTERRUPT) | |
47 | ||
48 | /** Interrupts that we mask and unmask at runtime. */ | |
49 | #define I915_INTERRUPT_ENABLE_VAR (I915_USER_INTERRUPT) | |
50 | ||
51 | /** These are all of the interrupts used by the driver */ | |
52 | #define I915_INTERRUPT_ENABLE_MASK (I915_INTERRUPT_ENABLE_FIX | \ | |
53 | I915_INTERRUPT_ENABLE_VAR) | |
ed4cb414 | 54 | |
79e53945 JB |
55 | #define I915_PIPE_VBLANK_STATUS (PIPE_START_VBLANK_INTERRUPT_STATUS |\ |
56 | PIPE_VBLANK_INTERRUPT_STATUS) | |
57 | ||
58 | #define I915_PIPE_VBLANK_ENABLE (PIPE_START_VBLANK_INTERRUPT_ENABLE |\ | |
59 | PIPE_VBLANK_INTERRUPT_ENABLE) | |
60 | ||
61 | #define DRM_I915_VBLANK_PIPE_ALL (DRM_I915_VBLANK_PIPE_A | \ | |
62 | DRM_I915_VBLANK_PIPE_B) | |
63 | ||
8ee1c3db | 64 | void |
ed4cb414 EA |
65 | i915_enable_irq(drm_i915_private_t *dev_priv, u32 mask) |
66 | { | |
67 | if ((dev_priv->irq_mask_reg & mask) != 0) { | |
68 | dev_priv->irq_mask_reg &= ~mask; | |
69 | I915_WRITE(IMR, dev_priv->irq_mask_reg); | |
70 | (void) I915_READ(IMR); | |
71 | } | |
72 | } | |
73 | ||
74 | static inline void | |
75 | i915_disable_irq(drm_i915_private_t *dev_priv, u32 mask) | |
76 | { | |
77 | if ((dev_priv->irq_mask_reg & mask) != mask) { | |
78 | dev_priv->irq_mask_reg |= mask; | |
79 | I915_WRITE(IMR, dev_priv->irq_mask_reg); | |
80 | (void) I915_READ(IMR); | |
81 | } | |
82 | } | |
83 | ||
7c463586 KP |
84 | static inline u32 |
85 | i915_pipestat(int pipe) | |
86 | { | |
87 | if (pipe == 0) | |
88 | return PIPEASTAT; | |
89 | if (pipe == 1) | |
90 | return PIPEBSTAT; | |
9c84ba4e | 91 | BUG(); |
7c463586 KP |
92 | } |
93 | ||
94 | void | |
95 | i915_enable_pipestat(drm_i915_private_t *dev_priv, int pipe, u32 mask) | |
96 | { | |
97 | if ((dev_priv->pipestat[pipe] & mask) != mask) { | |
98 | u32 reg = i915_pipestat(pipe); | |
99 | ||
100 | dev_priv->pipestat[pipe] |= mask; | |
101 | /* Enable the interrupt, clear any pending status */ | |
102 | I915_WRITE(reg, dev_priv->pipestat[pipe] | (mask >> 16)); | |
103 | (void) I915_READ(reg); | |
104 | } | |
105 | } | |
106 | ||
107 | void | |
108 | i915_disable_pipestat(drm_i915_private_t *dev_priv, int pipe, u32 mask) | |
109 | { | |
110 | if ((dev_priv->pipestat[pipe] & mask) != 0) { | |
111 | u32 reg = i915_pipestat(pipe); | |
112 | ||
113 | dev_priv->pipestat[pipe] &= ~mask; | |
114 | I915_WRITE(reg, dev_priv->pipestat[pipe]); | |
115 | (void) I915_READ(reg); | |
116 | } | |
117 | } | |
118 | ||
0a3e67a4 JB |
119 | /** |
120 | * i915_pipe_enabled - check if a pipe is enabled | |
121 | * @dev: DRM device | |
122 | * @pipe: pipe to check | |
123 | * | |
124 | * Reading certain registers when the pipe is disabled can hang the chip. | |
125 | * Use this routine to make sure the PLL is running and the pipe is active | |
126 | * before reading such registers if unsure. | |
127 | */ | |
128 | static int | |
129 | i915_pipe_enabled(struct drm_device *dev, int pipe) | |
130 | { | |
131 | drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; | |
132 | unsigned long pipeconf = pipe ? PIPEBCONF : PIPEACONF; | |
133 | ||
134 | if (I915_READ(pipeconf) & PIPEACONF_ENABLE) | |
135 | return 1; | |
136 | ||
137 | return 0; | |
138 | } | |
139 | ||
42f52ef8 KP |
140 | /* Called from drm generic code, passed a 'crtc', which |
141 | * we use as a pipe index | |
142 | */ | |
143 | u32 i915_get_vblank_counter(struct drm_device *dev, int pipe) | |
0a3e67a4 JB |
144 | { |
145 | drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; | |
146 | unsigned long high_frame; | |
147 | unsigned long low_frame; | |
148 | u32 high1, high2, low, count; | |
0a3e67a4 | 149 | |
0a3e67a4 JB |
150 | high_frame = pipe ? PIPEBFRAMEHIGH : PIPEAFRAMEHIGH; |
151 | low_frame = pipe ? PIPEBFRAMEPIXEL : PIPEAFRAMEPIXEL; | |
152 | ||
153 | if (!i915_pipe_enabled(dev, pipe)) { | |
154 | DRM_ERROR("trying to get vblank count for disabled pipe %d\n", pipe); | |
155 | return 0; | |
156 | } | |
157 | ||
158 | /* | |
159 | * High & low register fields aren't synchronized, so make sure | |
160 | * we get a low value that's stable across two reads of the high | |
161 | * register. | |
162 | */ | |
163 | do { | |
164 | high1 = ((I915_READ(high_frame) & PIPE_FRAME_HIGH_MASK) >> | |
165 | PIPE_FRAME_HIGH_SHIFT); | |
166 | low = ((I915_READ(low_frame) & PIPE_FRAME_LOW_MASK) >> | |
167 | PIPE_FRAME_LOW_SHIFT); | |
168 | high2 = ((I915_READ(high_frame) & PIPE_FRAME_HIGH_MASK) >> | |
169 | PIPE_FRAME_HIGH_SHIFT); | |
170 | } while (high1 != high2); | |
171 | ||
172 | count = (high1 << 8) | low; | |
173 | ||
174 | return count; | |
175 | } | |
176 | ||
1da177e4 LT |
177 | irqreturn_t i915_driver_irq_handler(DRM_IRQ_ARGS) |
178 | { | |
84b1fd10 | 179 | struct drm_device *dev = (struct drm_device *) arg; |
1da177e4 | 180 | drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; |
7c1c2871 | 181 | struct drm_i915_master_private *master_priv; |
cdfbc41f EA |
182 | u32 iir, new_iir; |
183 | u32 pipea_stats, pipeb_stats; | |
05eff845 KP |
184 | u32 vblank_status; |
185 | u32 vblank_enable; | |
0a3e67a4 | 186 | int vblank = 0; |
7c463586 | 187 | unsigned long irqflags; |
05eff845 KP |
188 | int irq_received; |
189 | int ret = IRQ_NONE; | |
6e5fca53 | 190 | |
630681d9 EA |
191 | atomic_inc(&dev_priv->irq_received); |
192 | ||
ed4cb414 | 193 | iir = I915_READ(IIR); |
a6b54f3f | 194 | |
05eff845 KP |
195 | if (IS_I965G(dev)) { |
196 | vblank_status = I915_START_VBLANK_INTERRUPT_STATUS; | |
197 | vblank_enable = PIPE_START_VBLANK_INTERRUPT_ENABLE; | |
198 | } else { | |
199 | vblank_status = I915_VBLANK_INTERRUPT_STATUS; | |
200 | vblank_enable = I915_VBLANK_INTERRUPT_ENABLE; | |
201 | } | |
af6061af | 202 | |
05eff845 KP |
203 | for (;;) { |
204 | irq_received = iir != 0; | |
205 | ||
206 | /* Can't rely on pipestat interrupt bit in iir as it might | |
207 | * have been cleared after the pipestat interrupt was received. | |
208 | * It doesn't set the bit in iir again, but it still produces | |
209 | * interrupts (for non-MSI). | |
210 | */ | |
211 | spin_lock_irqsave(&dev_priv->user_irq_lock, irqflags); | |
212 | pipea_stats = I915_READ(PIPEASTAT); | |
213 | pipeb_stats = I915_READ(PIPEBSTAT); | |
79e53945 | 214 | |
cdfbc41f EA |
215 | /* |
216 | * Clear the PIPE(A|B)STAT regs before the IIR | |
217 | */ | |
05eff845 | 218 | if (pipea_stats & 0x8000ffff) { |
cdfbc41f | 219 | I915_WRITE(PIPEASTAT, pipea_stats); |
05eff845 | 220 | irq_received = 1; |
cdfbc41f | 221 | } |
1da177e4 | 222 | |
05eff845 | 223 | if (pipeb_stats & 0x8000ffff) { |
cdfbc41f | 224 | I915_WRITE(PIPEBSTAT, pipeb_stats); |
05eff845 | 225 | irq_received = 1; |
cdfbc41f | 226 | } |
05eff845 KP |
227 | spin_unlock_irqrestore(&dev_priv->user_irq_lock, irqflags); |
228 | ||
229 | if (!irq_received) | |
230 | break; | |
231 | ||
232 | ret = IRQ_HANDLED; | |
8ee1c3db | 233 | |
cdfbc41f EA |
234 | I915_WRITE(IIR, iir); |
235 | new_iir = I915_READ(IIR); /* Flush posted writes */ | |
7c463586 | 236 | |
7c1c2871 DA |
237 | if (dev->primary->master) { |
238 | master_priv = dev->primary->master->driver_priv; | |
239 | if (master_priv->sarea_priv) | |
240 | master_priv->sarea_priv->last_dispatch = | |
241 | READ_BREADCRUMB(dev_priv); | |
242 | } | |
0a3e67a4 | 243 | |
cdfbc41f EA |
244 | if (iir & I915_USER_INTERRUPT) { |
245 | dev_priv->mm.irq_gem_seqno = i915_get_gem_seqno(dev); | |
246 | DRM_WAKEUP(&dev_priv->irq_queue); | |
247 | } | |
673a394b | 248 | |
05eff845 | 249 | if (pipea_stats & vblank_status) { |
cdfbc41f EA |
250 | vblank++; |
251 | drm_handle_vblank(dev, 0); | |
252 | } | |
7c463586 | 253 | |
05eff845 | 254 | if (pipeb_stats & vblank_status) { |
cdfbc41f EA |
255 | vblank++; |
256 | drm_handle_vblank(dev, 1); | |
257 | } | |
7c463586 | 258 | |
cdfbc41f EA |
259 | if ((pipeb_stats & I915_LEGACY_BLC_EVENT_STATUS) || |
260 | (iir & I915_ASLE_INTERRUPT)) | |
261 | opregion_asle_intr(dev); | |
262 | ||
263 | /* With MSI, interrupts are only generated when iir | |
264 | * transitions from zero to nonzero. If another bit got | |
265 | * set while we were handling the existing iir bits, then | |
266 | * we would never get another interrupt. | |
267 | * | |
268 | * This is fine on non-MSI as well, as if we hit this path | |
269 | * we avoid exiting the interrupt handler only to generate | |
270 | * another one. | |
271 | * | |
272 | * Note that for MSI this could cause a stray interrupt report | |
273 | * if an interrupt landed in the time between writing IIR and | |
274 | * the posting read. This should be rare enough to never | |
275 | * trigger the 99% of 100,000 interrupts test for disabling | |
276 | * stray interrupts. | |
277 | */ | |
278 | iir = new_iir; | |
05eff845 | 279 | } |
0a3e67a4 | 280 | |
05eff845 | 281 | return ret; |
1da177e4 LT |
282 | } |
283 | ||
af6061af | 284 | static int i915_emit_irq(struct drm_device * dev) |
1da177e4 LT |
285 | { |
286 | drm_i915_private_t *dev_priv = dev->dev_private; | |
7c1c2871 | 287 | struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv; |
1da177e4 LT |
288 | RING_LOCALS; |
289 | ||
290 | i915_kernel_lost_context(dev); | |
291 | ||
3e684eae | 292 | DRM_DEBUG("\n"); |
1da177e4 | 293 | |
c99b058f | 294 | dev_priv->counter++; |
c29b669c | 295 | if (dev_priv->counter > 0x7FFFFFFFUL) |
c99b058f | 296 | dev_priv->counter = 1; |
7c1c2871 DA |
297 | if (master_priv->sarea_priv) |
298 | master_priv->sarea_priv->last_enqueue = dev_priv->counter; | |
c29b669c | 299 | |
0baf823a | 300 | BEGIN_LP_RING(4); |
585fb111 | 301 | OUT_RING(MI_STORE_DWORD_INDEX); |
0baf823a | 302 | OUT_RING(I915_BREADCRUMB_INDEX << MI_STORE_DWORD_INDEX_SHIFT); |
c29b669c | 303 | OUT_RING(dev_priv->counter); |
585fb111 | 304 | OUT_RING(MI_USER_INTERRUPT); |
1da177e4 | 305 | ADVANCE_LP_RING(); |
bc5f4523 | 306 | |
c29b669c | 307 | return dev_priv->counter; |
1da177e4 LT |
308 | } |
309 | ||
673a394b | 310 | void i915_user_irq_get(struct drm_device *dev) |
ed4cb414 EA |
311 | { |
312 | drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; | |
e9d21d7f | 313 | unsigned long irqflags; |
ed4cb414 | 314 | |
e9d21d7f | 315 | spin_lock_irqsave(&dev_priv->user_irq_lock, irqflags); |
ed4cb414 EA |
316 | if (dev->irq_enabled && (++dev_priv->user_irq_refcount == 1)) |
317 | i915_enable_irq(dev_priv, I915_USER_INTERRUPT); | |
e9d21d7f | 318 | spin_unlock_irqrestore(&dev_priv->user_irq_lock, irqflags); |
ed4cb414 EA |
319 | } |
320 | ||
0a3e67a4 | 321 | void i915_user_irq_put(struct drm_device *dev) |
ed4cb414 EA |
322 | { |
323 | drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; | |
e9d21d7f | 324 | unsigned long irqflags; |
ed4cb414 | 325 | |
e9d21d7f | 326 | spin_lock_irqsave(&dev_priv->user_irq_lock, irqflags); |
ed4cb414 EA |
327 | BUG_ON(dev->irq_enabled && dev_priv->user_irq_refcount <= 0); |
328 | if (dev->irq_enabled && (--dev_priv->user_irq_refcount == 0)) | |
329 | i915_disable_irq(dev_priv, I915_USER_INTERRUPT); | |
e9d21d7f | 330 | spin_unlock_irqrestore(&dev_priv->user_irq_lock, irqflags); |
ed4cb414 EA |
331 | } |
332 | ||
84b1fd10 | 333 | static int i915_wait_irq(struct drm_device * dev, int irq_nr) |
1da177e4 LT |
334 | { |
335 | drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; | |
7c1c2871 | 336 | struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv; |
1da177e4 LT |
337 | int ret = 0; |
338 | ||
3e684eae | 339 | DRM_DEBUG("irq_nr=%d breadcrumb=%d\n", irq_nr, |
1da177e4 LT |
340 | READ_BREADCRUMB(dev_priv)); |
341 | ||
ed4cb414 | 342 | if (READ_BREADCRUMB(dev_priv) >= irq_nr) { |
7c1c2871 DA |
343 | if (master_priv->sarea_priv) |
344 | master_priv->sarea_priv->last_dispatch = READ_BREADCRUMB(dev_priv); | |
1da177e4 | 345 | return 0; |
ed4cb414 | 346 | } |
1da177e4 | 347 | |
7c1c2871 DA |
348 | if (master_priv->sarea_priv) |
349 | master_priv->sarea_priv->perf_boxes |= I915_BOX_WAIT; | |
1da177e4 | 350 | |
ed4cb414 | 351 | i915_user_irq_get(dev); |
1da177e4 LT |
352 | DRM_WAIT_ON(ret, dev_priv->irq_queue, 3 * DRM_HZ, |
353 | READ_BREADCRUMB(dev_priv) >= irq_nr); | |
ed4cb414 | 354 | i915_user_irq_put(dev); |
1da177e4 | 355 | |
20caafa6 | 356 | if (ret == -EBUSY) { |
3e684eae | 357 | DRM_ERROR("EBUSY -- rec: %d emitted: %d\n", |
1da177e4 LT |
358 | READ_BREADCRUMB(dev_priv), (int)dev_priv->counter); |
359 | } | |
360 | ||
af6061af DA |
361 | return ret; |
362 | } | |
363 | ||
1da177e4 LT |
364 | /* Needs the lock as it touches the ring. |
365 | */ | |
c153f45f EA |
366 | int i915_irq_emit(struct drm_device *dev, void *data, |
367 | struct drm_file *file_priv) | |
1da177e4 | 368 | { |
1da177e4 | 369 | drm_i915_private_t *dev_priv = dev->dev_private; |
c153f45f | 370 | drm_i915_irq_emit_t *emit = data; |
1da177e4 LT |
371 | int result; |
372 | ||
546b0974 | 373 | RING_LOCK_TEST_WITH_RETURN(dev, file_priv); |
1da177e4 LT |
374 | |
375 | if (!dev_priv) { | |
3e684eae | 376 | DRM_ERROR("called with no initialization\n"); |
20caafa6 | 377 | return -EINVAL; |
1da177e4 | 378 | } |
546b0974 | 379 | mutex_lock(&dev->struct_mutex); |
1da177e4 | 380 | result = i915_emit_irq(dev); |
546b0974 | 381 | mutex_unlock(&dev->struct_mutex); |
1da177e4 | 382 | |
c153f45f | 383 | if (DRM_COPY_TO_USER(emit->irq_seq, &result, sizeof(int))) { |
1da177e4 | 384 | DRM_ERROR("copy_to_user\n"); |
20caafa6 | 385 | return -EFAULT; |
1da177e4 LT |
386 | } |
387 | ||
388 | return 0; | |
389 | } | |
390 | ||
391 | /* Doesn't need the hardware lock. | |
392 | */ | |
c153f45f EA |
393 | int i915_irq_wait(struct drm_device *dev, void *data, |
394 | struct drm_file *file_priv) | |
1da177e4 | 395 | { |
1da177e4 | 396 | drm_i915_private_t *dev_priv = dev->dev_private; |
c153f45f | 397 | drm_i915_irq_wait_t *irqwait = data; |
1da177e4 LT |
398 | |
399 | if (!dev_priv) { | |
3e684eae | 400 | DRM_ERROR("called with no initialization\n"); |
20caafa6 | 401 | return -EINVAL; |
1da177e4 LT |
402 | } |
403 | ||
c153f45f | 404 | return i915_wait_irq(dev, irqwait->irq_seq); |
1da177e4 LT |
405 | } |
406 | ||
42f52ef8 KP |
407 | /* Called from drm generic code, passed 'crtc' which |
408 | * we use as a pipe index | |
409 | */ | |
410 | int i915_enable_vblank(struct drm_device *dev, int pipe) | |
0a3e67a4 JB |
411 | { |
412 | drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; | |
e9d21d7f | 413 | unsigned long irqflags; |
71e0ffa5 JB |
414 | int pipeconf_reg = (pipe == 0) ? PIPEACONF : PIPEBCONF; |
415 | u32 pipeconf; | |
416 | ||
417 | pipeconf = I915_READ(pipeconf_reg); | |
418 | if (!(pipeconf & PIPEACONF_ENABLE)) | |
419 | return -EINVAL; | |
0a3e67a4 | 420 | |
e9d21d7f | 421 | spin_lock_irqsave(&dev_priv->user_irq_lock, irqflags); |
e9d21d7f | 422 | if (IS_I965G(dev)) |
7c463586 KP |
423 | i915_enable_pipestat(dev_priv, pipe, |
424 | PIPE_START_VBLANK_INTERRUPT_ENABLE); | |
e9d21d7f | 425 | else |
7c463586 KP |
426 | i915_enable_pipestat(dev_priv, pipe, |
427 | PIPE_VBLANK_INTERRUPT_ENABLE); | |
e9d21d7f | 428 | spin_unlock_irqrestore(&dev_priv->user_irq_lock, irqflags); |
0a3e67a4 JB |
429 | return 0; |
430 | } | |
431 | ||
42f52ef8 KP |
432 | /* Called from drm generic code, passed 'crtc' which |
433 | * we use as a pipe index | |
434 | */ | |
435 | void i915_disable_vblank(struct drm_device *dev, int pipe) | |
0a3e67a4 JB |
436 | { |
437 | drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; | |
e9d21d7f | 438 | unsigned long irqflags; |
0a3e67a4 | 439 | |
e9d21d7f | 440 | spin_lock_irqsave(&dev_priv->user_irq_lock, irqflags); |
7c463586 KP |
441 | i915_disable_pipestat(dev_priv, pipe, |
442 | PIPE_VBLANK_INTERRUPT_ENABLE | | |
443 | PIPE_START_VBLANK_INTERRUPT_ENABLE); | |
e9d21d7f | 444 | spin_unlock_irqrestore(&dev_priv->user_irq_lock, irqflags); |
0a3e67a4 JB |
445 | } |
446 | ||
79e53945 JB |
447 | void i915_enable_interrupt (struct drm_device *dev) |
448 | { | |
449 | struct drm_i915_private *dev_priv = dev->dev_private; | |
450 | opregion_enable_asle(dev); | |
451 | dev_priv->irq_enabled = 1; | |
452 | } | |
453 | ||
454 | ||
702880f2 DA |
455 | /* Set the vblank monitor pipe |
456 | */ | |
c153f45f EA |
457 | int i915_vblank_pipe_set(struct drm_device *dev, void *data, |
458 | struct drm_file *file_priv) | |
702880f2 | 459 | { |
702880f2 | 460 | drm_i915_private_t *dev_priv = dev->dev_private; |
702880f2 DA |
461 | |
462 | if (!dev_priv) { | |
3e684eae | 463 | DRM_ERROR("called with no initialization\n"); |
20caafa6 | 464 | return -EINVAL; |
702880f2 DA |
465 | } |
466 | ||
5b51694a | 467 | return 0; |
702880f2 DA |
468 | } |
469 | ||
c153f45f EA |
470 | int i915_vblank_pipe_get(struct drm_device *dev, void *data, |
471 | struct drm_file *file_priv) | |
702880f2 | 472 | { |
702880f2 | 473 | drm_i915_private_t *dev_priv = dev->dev_private; |
c153f45f | 474 | drm_i915_vblank_pipe_t *pipe = data; |
702880f2 DA |
475 | |
476 | if (!dev_priv) { | |
3e684eae | 477 | DRM_ERROR("called with no initialization\n"); |
20caafa6 | 478 | return -EINVAL; |
702880f2 DA |
479 | } |
480 | ||
0a3e67a4 | 481 | pipe->pipe = DRM_I915_VBLANK_PIPE_A | DRM_I915_VBLANK_PIPE_B; |
c153f45f | 482 | |
702880f2 DA |
483 | return 0; |
484 | } | |
485 | ||
a6b54f3f MCA |
486 | /** |
487 | * Schedule buffer swap at given vertical blank. | |
488 | */ | |
c153f45f EA |
489 | int i915_vblank_swap(struct drm_device *dev, void *data, |
490 | struct drm_file *file_priv) | |
a6b54f3f | 491 | { |
bd95e0a4 EA |
492 | /* The delayed swap mechanism was fundamentally racy, and has been |
493 | * removed. The model was that the client requested a delayed flip/swap | |
494 | * from the kernel, then waited for vblank before continuing to perform | |
495 | * rendering. The problem was that the kernel might wake the client | |
496 | * up before it dispatched the vblank swap (since the lock has to be | |
497 | * held while touching the ringbuffer), in which case the client would | |
498 | * clear and start the next frame before the swap occurred, and | |
499 | * flicker would occur in addition to likely missing the vblank. | |
500 | * | |
501 | * In the absence of this ioctl, userland falls back to a correct path | |
502 | * of waiting for a vblank, then dispatching the swap on its own. | |
503 | * Context switching to userland and back is plenty fast enough for | |
504 | * meeting the requirements of vblank swapping. | |
0a3e67a4 | 505 | */ |
bd95e0a4 | 506 | return -EINVAL; |
a6b54f3f MCA |
507 | } |
508 | ||
1da177e4 LT |
509 | /* drm_dma.h hooks |
510 | */ | |
84b1fd10 | 511 | void i915_driver_irq_preinstall(struct drm_device * dev) |
1da177e4 LT |
512 | { |
513 | drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; | |
514 | ||
79e53945 JB |
515 | atomic_set(&dev_priv->irq_received, 0); |
516 | ||
0a3e67a4 | 517 | I915_WRITE(HWSTAM, 0xeffe); |
7c463586 KP |
518 | I915_WRITE(PIPEASTAT, 0); |
519 | I915_WRITE(PIPEBSTAT, 0); | |
0a3e67a4 | 520 | I915_WRITE(IMR, 0xffffffff); |
ed4cb414 | 521 | I915_WRITE(IER, 0x0); |
7c463586 | 522 | (void) I915_READ(IER); |
1da177e4 LT |
523 | } |
524 | ||
0a3e67a4 | 525 | int i915_driver_irq_postinstall(struct drm_device *dev) |
1da177e4 LT |
526 | { |
527 | drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; | |
0a3e67a4 JB |
528 | |
529 | dev_priv->vblank_pipe = DRM_I915_VBLANK_PIPE_A | DRM_I915_VBLANK_PIPE_B; | |
0a3e67a4 JB |
530 | |
531 | dev->max_vblank_count = 0xffffff; /* only 24 bits of frame count */ | |
ed4cb414 | 532 | |
7c463586 KP |
533 | /* Unmask the interrupts that we always want on. */ |
534 | dev_priv->irq_mask_reg = ~I915_INTERRUPT_ENABLE_FIX; | |
535 | ||
536 | dev_priv->pipestat[0] = 0; | |
537 | dev_priv->pipestat[1] = 0; | |
538 | ||
539 | /* Disable pipe interrupt enables, clear pending pipe status */ | |
540 | I915_WRITE(PIPEASTAT, I915_READ(PIPEASTAT) & 0x8000ffff); | |
541 | I915_WRITE(PIPEBSTAT, I915_READ(PIPEBSTAT) & 0x8000ffff); | |
542 | /* Clear pending interrupt status */ | |
543 | I915_WRITE(IIR, I915_READ(IIR)); | |
8ee1c3db | 544 | |
ed4cb414 | 545 | I915_WRITE(IER, I915_INTERRUPT_ENABLE_MASK); |
7c463586 | 546 | I915_WRITE(IMR, dev_priv->irq_mask_reg); |
ed4cb414 EA |
547 | (void) I915_READ(IER); |
548 | ||
8ee1c3db | 549 | opregion_enable_asle(dev); |
1da177e4 | 550 | DRM_INIT_WAITQUEUE(&dev_priv->irq_queue); |
0a3e67a4 JB |
551 | |
552 | return 0; | |
1da177e4 LT |
553 | } |
554 | ||
84b1fd10 | 555 | void i915_driver_irq_uninstall(struct drm_device * dev) |
1da177e4 LT |
556 | { |
557 | drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; | |
91e3738e | 558 | |
1da177e4 LT |
559 | if (!dev_priv) |
560 | return; | |
561 | ||
0a3e67a4 JB |
562 | dev_priv->vblank_pipe = 0; |
563 | ||
564 | I915_WRITE(HWSTAM, 0xffffffff); | |
7c463586 KP |
565 | I915_WRITE(PIPEASTAT, 0); |
566 | I915_WRITE(PIPEBSTAT, 0); | |
0a3e67a4 | 567 | I915_WRITE(IMR, 0xffffffff); |
ed4cb414 | 568 | I915_WRITE(IER, 0x0); |
af6061af | 569 | |
7c463586 KP |
570 | I915_WRITE(PIPEASTAT, I915_READ(PIPEASTAT) & 0x8000ffff); |
571 | I915_WRITE(PIPEBSTAT, I915_READ(PIPEBSTAT) & 0x8000ffff); | |
572 | I915_WRITE(IIR, I915_READ(IIR)); | |
1da177e4 | 573 | } |