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drm/i915: Only warn the first time we attempt to mmio whilst suspended
[deliverable/linux.git] / drivers / gpu / drm / i915 / intel_uncore.c
CommitLineData
907b28c5
CW		 1/*
2 * Copyright © 2013 Intel Corporation
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
13 * Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
21 * IN THE SOFTWARE.
22 */
23
24#include "i915_drv.h"
25#include "intel_drv.h"
26
27#define FORCEWAKE_ACK_TIMEOUT_MS 2
28
6af5d92f
CW		 29#define __raw_i915_read8(dev_priv__, reg__) readb((dev_priv__)->regs + (reg__))
30#define __raw_i915_write8(dev_priv__, reg__, val__) writeb(val__, (dev_priv__)->regs + (reg__))
31
32#define __raw_i915_read16(dev_priv__, reg__) readw((dev_priv__)->regs + (reg__))
33#define __raw_i915_write16(dev_priv__, reg__, val__) writew(val__, (dev_priv__)->regs + (reg__))
34
35#define __raw_i915_read32(dev_priv__, reg__) readl((dev_priv__)->regs + (reg__))
36#define __raw_i915_write32(dev_priv__, reg__, val__) writel(val__, (dev_priv__)->regs + (reg__))
37
38#define __raw_i915_read64(dev_priv__, reg__) readq((dev_priv__)->regs + (reg__))
39#define __raw_i915_write64(dev_priv__, reg__, val__) writeq(val__, (dev_priv__)->regs + (reg__))
40
41#define __raw_posting_read(dev_priv__, reg__) (void)__raw_i915_read32(dev_priv__, reg__)
42
b2ec142c
PZ		 43static void
44assert_device_not_suspended(struct drm_i915_private *dev_priv)
45{
2b387059
CW		 46 WARN_ONCE(HAS_RUNTIME_PM(dev_priv->dev) && dev_priv->pm.suspended,
47 "Device suspended\n");
b2ec142c 48}
6af5d92f 49
907b28c5
CW		 50static void __gen6_gt_wait_for_thread_c0(struct drm_i915_private *dev_priv)
51{
907b28c5
CW		 52 /* w/a for a sporadic read returning 0 by waiting for the GT
53 * thread to wake up.
54 */
eb88bd1b
VS		 55 if (wait_for_atomic_us((__raw_i915_read32(dev_priv, GEN6_GT_THREAD_STATUS_REG) &
56 GEN6_GT_THREAD_STATUS_CORE_MASK) == 0, 500))
907b28c5
CW		 57 DRM_ERROR("GT thread status wait timed out\n");
58}
59
60static void __gen6_gt_force_wake_reset(struct drm_i915_private *dev_priv)
61{
6af5d92f
CW		 62 __raw_i915_write32(dev_priv, FORCEWAKE, 0);
63 /* something from same cacheline, but !FORCEWAKE */
64 __raw_posting_read(dev_priv, ECOBUS);
907b28c5
CW		 65}
66
c8d9a590
D		 67static void __gen6_gt_force_wake_get(struct drm_i915_private *dev_priv,
68 int fw_engine)
907b28c5 69{
6af5d92f 70 if (wait_for_atomic((__raw_i915_read32(dev_priv, FORCEWAKE_ACK) & 1) == 0,
907b28c5
CW		 71 FORCEWAKE_ACK_TIMEOUT_MS))
72 DRM_ERROR("Timed out waiting for forcewake old ack to clear.\n");
73
6af5d92f
CW		 74 __raw_i915_write32(dev_priv, FORCEWAKE, 1);
75 /* something from same cacheline, but !FORCEWAKE */
76 __raw_posting_read(dev_priv, ECOBUS);
907b28c5 77
6af5d92f 78 if (wait_for_atomic((__raw_i915_read32(dev_priv, FORCEWAKE_ACK) & 1),
907b28c5
CW		 79 FORCEWAKE_ACK_TIMEOUT_MS))
80 DRM_ERROR("Timed out waiting for forcewake to ack request.\n");
81
82 /* WaRsForcewakeWaitTC0:snb */
83 __gen6_gt_wait_for_thread_c0(dev_priv);
84}
85
6a68735a 86static void __gen7_gt_force_wake_mt_reset(struct drm_i915_private *dev_priv)
907b28c5 87{
6af5d92f 88 __raw_i915_write32(dev_priv, FORCEWAKE_MT, _MASKED_BIT_DISABLE(0xffff));
907b28c5 89 /* something from same cacheline, but !FORCEWAKE_MT */
6af5d92f 90 __raw_posting_read(dev_priv, ECOBUS);
907b28c5
CW		 91}
92
6a68735a 93static void __gen7_gt_force_wake_mt_get(struct drm_i915_private *dev_priv,
c8d9a590 94 int fw_engine)
907b28c5
CW		 95{
96 u32 forcewake_ack;
97
f98cd096 98 if (IS_HASWELL(dev_priv->dev) || IS_BROADWELL(dev_priv->dev))
907b28c5
CW		 99 forcewake_ack = FORCEWAKE_ACK_HSW;
100 else
101 forcewake_ack = FORCEWAKE_MT_ACK;
102
6af5d92f 103 if (wait_for_atomic((__raw_i915_read32(dev_priv, forcewake_ack) & FORCEWAKE_KERNEL) == 0,
907b28c5
CW		 104 FORCEWAKE_ACK_TIMEOUT_MS))
105 DRM_ERROR("Timed out waiting for forcewake old ack to clear.\n");
106
6af5d92f
CW		 107 __raw_i915_write32(dev_priv, FORCEWAKE_MT,
108 _MASKED_BIT_ENABLE(FORCEWAKE_KERNEL));
907b28c5 109 /* something from same cacheline, but !FORCEWAKE_MT */
6af5d92f 110 __raw_posting_read(dev_priv, ECOBUS);
907b28c5 111
6af5d92f 112 if (wait_for_atomic((__raw_i915_read32(dev_priv, forcewake_ack) & FORCEWAKE_KERNEL),
907b28c5
CW		 113 FORCEWAKE_ACK_TIMEOUT_MS))
114 DRM_ERROR("Timed out waiting for forcewake to ack request.\n");
115
116 /* WaRsForcewakeWaitTC0:ivb,hsw */
c549f738 117 __gen6_gt_wait_for_thread_c0(dev_priv);
907b28c5
CW		 118}
119
120static void gen6_gt_check_fifodbg(struct drm_i915_private *dev_priv)
121{
122 u32 gtfifodbg;
6af5d92f
CW		 123
124 gtfifodbg = __raw_i915_read32(dev_priv, GTFIFODBG);
90f256b5
VS		 125 if (WARN(gtfifodbg, "GT wake FIFO error 0x%x\n", gtfifodbg))
126 __raw_i915_write32(dev_priv, GTFIFODBG, gtfifodbg);
907b28c5
CW		 127}
128
c8d9a590
D		 129static void __gen6_gt_force_wake_put(struct drm_i915_private *dev_priv,
130 int fw_engine)
907b28c5 131{
6af5d92f 132 __raw_i915_write32(dev_priv, FORCEWAKE, 0);
907b28c5 133 /* something from same cacheline, but !FORCEWAKE */
6af5d92f 134 __raw_posting_read(dev_priv, ECOBUS);
907b28c5
CW		 135 gen6_gt_check_fifodbg(dev_priv);
136}
137
6a68735a 138static void __gen7_gt_force_wake_mt_put(struct drm_i915_private *dev_priv,
c8d9a590 139 int fw_engine)
907b28c5 140{
6af5d92f
CW		 141 __raw_i915_write32(dev_priv, FORCEWAKE_MT,
142 _MASKED_BIT_DISABLE(FORCEWAKE_KERNEL));
907b28c5 143 /* something from same cacheline, but !FORCEWAKE_MT */
6af5d92f 144 __raw_posting_read(dev_priv, ECOBUS);
6a68735a
MK		 145
146 if (IS_GEN7(dev_priv->dev))
147 gen6_gt_check_fifodbg(dev_priv);
907b28c5
CW		 148}
149
150static int __gen6_gt_wait_for_fifo(struct drm_i915_private *dev_priv)
151{
152 int ret = 0;
153
5135d64b
D		 154 /* On VLV, FIFO will be shared by both SW and HW.
155 * So, we need to read the FREE_ENTRIES everytime */
156 if (IS_VALLEYVIEW(dev_priv->dev))
157 dev_priv->uncore.fifo_count =
158 __raw_i915_read32(dev_priv, GTFIFOCTL) &
159 GT_FIFO_FREE_ENTRIES_MASK;
160
907b28c5
CW		 161 if (dev_priv->uncore.fifo_count < GT_FIFO_NUM_RESERVED_ENTRIES) {
162 int loop = 500;
46520e2b 163 u32 fifo = __raw_i915_read32(dev_priv, GTFIFOCTL) & GT_FIFO_FREE_ENTRIES_MASK;
907b28c5
CW		 164 while (fifo <= GT_FIFO_NUM_RESERVED_ENTRIES && loop--) {
165 udelay(10);
46520e2b 166 fifo = __raw_i915_read32(dev_priv, GTFIFOCTL) & GT_FIFO_FREE_ENTRIES_MASK;
907b28c5
CW		 167 }
168 if (WARN_ON(loop < 0 && fifo <= GT_FIFO_NUM_RESERVED_ENTRIES))
169 ++ret;
170 dev_priv->uncore.fifo_count = fifo;
171 }
172 dev_priv->uncore.fifo_count--;
173
174 return ret;
175}
176
177static void vlv_force_wake_reset(struct drm_i915_private *dev_priv)
178{
6af5d92f
CW		 179 __raw_i915_write32(dev_priv, FORCEWAKE_VLV,
180 _MASKED_BIT_DISABLE(0xffff));
05adaf1f
JN		 181 __raw_i915_write32(dev_priv, FORCEWAKE_MEDIA_VLV,
182 _MASKED_BIT_DISABLE(0xffff));
907b28c5 183 /* something from same cacheline, but !FORCEWAKE_VLV */
6af5d92f 184 __raw_posting_read(dev_priv, FORCEWAKE_ACK_VLV);
907b28c5
CW		 185}
186
940aece4
D		 187static void __vlv_force_wake_get(struct drm_i915_private *dev_priv,
188 int fw_engine)
907b28c5 189{
940aece4
D		 190 /* Check for Render Engine */
191 if (FORCEWAKE_RENDER & fw_engine) {
95009861
MK		 192 if (wait_for_atomic((__raw_i915_read32(dev_priv,
193 FORCEWAKE_ACK_VLV) &
194 FORCEWAKE_KERNEL) == 0,
195 FORCEWAKE_ACK_TIMEOUT_MS))
196 DRM_ERROR("Timed out: Render forcewake old ack to clear.\n");
940aece4
D		 197
198 __raw_i915_write32(dev_priv, FORCEWAKE_VLV,
199 _MASKED_BIT_ENABLE(FORCEWAKE_KERNEL));
200
201 if (wait_for_atomic((__raw_i915_read32(dev_priv,
202 FORCEWAKE_ACK_VLV) &
203 FORCEWAKE_KERNEL),
204 FORCEWAKE_ACK_TIMEOUT_MS))
205 DRM_ERROR("Timed out: waiting for Render to ack.\n");
206 }
907b28c5 207
940aece4
D		 208 /* Check for Media Engine */
209 if (FORCEWAKE_MEDIA & fw_engine) {
95009861
MK		 210 if (wait_for_atomic((__raw_i915_read32(dev_priv,
211 FORCEWAKE_ACK_MEDIA_VLV) &
212 FORCEWAKE_KERNEL) == 0,
213 FORCEWAKE_ACK_TIMEOUT_MS))
214 DRM_ERROR("Timed out: Media forcewake old ack to clear.\n");
940aece4
D		 215
216 __raw_i915_write32(dev_priv, FORCEWAKE_MEDIA_VLV,
217 _MASKED_BIT_ENABLE(FORCEWAKE_KERNEL));
218
219 if (wait_for_atomic((__raw_i915_read32(dev_priv,
220 FORCEWAKE_ACK_MEDIA_VLV) &
221 FORCEWAKE_KERNEL),
222 FORCEWAKE_ACK_TIMEOUT_MS))
223 DRM_ERROR("Timed out: waiting for media to ack.\n");
224 }
907b28c5
CW		 225}
226
940aece4
D		 227static void __vlv_force_wake_put(struct drm_i915_private *dev_priv,
228 int fw_engine)
907b28c5 229{
940aece4
D		 230
231 /* Check for Render Engine */
232 if (FORCEWAKE_RENDER & fw_engine)
233 __raw_i915_write32(dev_priv, FORCEWAKE_VLV,
234 _MASKED_BIT_DISABLE(FORCEWAKE_KERNEL));
235
236
237 /* Check for Media Engine */
238 if (FORCEWAKE_MEDIA & fw_engine)
239 __raw_i915_write32(dev_priv, FORCEWAKE_MEDIA_VLV,
240 _MASKED_BIT_DISABLE(FORCEWAKE_KERNEL));
241
ab53c267
VS		 242 /* something from same cacheline, but !FORCEWAKE_VLV */
243 __raw_posting_read(dev_priv, FORCEWAKE_ACK_VLV);
244 if (!IS_CHERRYVIEW(dev_priv->dev))
245 gen6_gt_check_fifodbg(dev_priv);
940aece4
D		 246}
247
b88b23d9 248static void vlv_force_wake_get(struct drm_i915_private *dev_priv, int fw_engine)
940aece4
D		 249{
250 unsigned long irqflags;
251
252 spin_lock_irqsave(&dev_priv->uncore.lock, irqflags);
6fe72865
VS		 253
254 if (fw_engine & FORCEWAKE_RENDER &&
255 dev_priv->uncore.fw_rendercount++ != 0)
256 fw_engine &= ~FORCEWAKE_RENDER;
257 if (fw_engine & FORCEWAKE_MEDIA &&
258 dev_priv->uncore.fw_mediacount++ != 0)
259 fw_engine &= ~FORCEWAKE_MEDIA;
260
261 if (fw_engine)
262 dev_priv->uncore.funcs.force_wake_get(dev_priv, fw_engine);
940aece4
D		 263
264 spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags);
265}
266
b88b23d9 267static void vlv_force_wake_put(struct drm_i915_private *dev_priv, int fw_engine)
940aece4
D		 268{
269 unsigned long irqflags;
270
271 spin_lock_irqsave(&dev_priv->uncore.lock, irqflags);
272
3123fcaf
DV		 273 if (fw_engine & FORCEWAKE_RENDER) {
274 WARN_ON(!dev_priv->uncore.fw_rendercount);
275 if (--dev_priv->uncore.fw_rendercount != 0)
276 fw_engine &= ~FORCEWAKE_RENDER;
277 }
278
279 if (fw_engine & FORCEWAKE_MEDIA) {
280 WARN_ON(!dev_priv->uncore.fw_mediacount);
281 if (--dev_priv->uncore.fw_mediacount != 0)
282 fw_engine &= ~FORCEWAKE_MEDIA;
283 }
940aece4 284
6fe72865
VS		 285 if (fw_engine)
286 dev_priv->uncore.funcs.force_wake_put(dev_priv, fw_engine);
940aece4
D		 287
288 spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags);
907b28c5
CW		 289}
290
38cff0b1
ZW		 291static void __gen9_gt_force_wake_mt_reset(struct drm_i915_private *dev_priv)
292{
293 __raw_i915_write32(dev_priv, FORCEWAKE_RENDER_GEN9,
294 _MASKED_BIT_DISABLE(0xffff));
295
296 __raw_i915_write32(dev_priv, FORCEWAKE_MEDIA_GEN9,
297 _MASKED_BIT_DISABLE(0xffff));
298
299 __raw_i915_write32(dev_priv, FORCEWAKE_BLITTER_GEN9,
300 _MASKED_BIT_DISABLE(0xffff));
301}
302
303static void
304__gen9_force_wake_get(struct drm_i915_private *dev_priv, int fw_engine)
305{
306 /* Check for Render Engine */
307 if (FORCEWAKE_RENDER & fw_engine) {
308 if (wait_for_atomic((__raw_i915_read32(dev_priv,
309 FORCEWAKE_ACK_RENDER_GEN9) &
310 FORCEWAKE_KERNEL) == 0,
311 FORCEWAKE_ACK_TIMEOUT_MS))
312 DRM_ERROR("Timed out: Render forcewake old ack to clear.\n");
313
314 __raw_i915_write32(dev_priv, FORCEWAKE_RENDER_GEN9,
315 _MASKED_BIT_ENABLE(FORCEWAKE_KERNEL));
316
317 if (wait_for_atomic((__raw_i915_read32(dev_priv,
318 FORCEWAKE_ACK_RENDER_GEN9) &
319 FORCEWAKE_KERNEL),
320 FORCEWAKE_ACK_TIMEOUT_MS))
321 DRM_ERROR("Timed out: waiting for Render to ack.\n");
322 }
323
324 /* Check for Media Engine */
325 if (FORCEWAKE_MEDIA & fw_engine) {
326 if (wait_for_atomic((__raw_i915_read32(dev_priv,
327 FORCEWAKE_ACK_MEDIA_GEN9) &
328 FORCEWAKE_KERNEL) == 0,
329 FORCEWAKE_ACK_TIMEOUT_MS))
330 DRM_ERROR("Timed out: Media forcewake old ack to clear.\n");
331
332 __raw_i915_write32(dev_priv, FORCEWAKE_MEDIA_GEN9,
333 _MASKED_BIT_ENABLE(FORCEWAKE_KERNEL));
334
335 if (wait_for_atomic((__raw_i915_read32(dev_priv,
336 FORCEWAKE_ACK_MEDIA_GEN9) &
337 FORCEWAKE_KERNEL),
338 FORCEWAKE_ACK_TIMEOUT_MS))
339 DRM_ERROR("Timed out: waiting for Media to ack.\n");
340 }
341
342 /* Check for Blitter Engine */
343 if (FORCEWAKE_BLITTER & fw_engine) {
344 if (wait_for_atomic((__raw_i915_read32(dev_priv,
345 FORCEWAKE_ACK_BLITTER_GEN9) &
346 FORCEWAKE_KERNEL) == 0,
347 FORCEWAKE_ACK_TIMEOUT_MS))
348 DRM_ERROR("Timed out: Blitter forcewake old ack to clear.\n");
349
350 __raw_i915_write32(dev_priv, FORCEWAKE_BLITTER_GEN9,
351 _MASKED_BIT_ENABLE(FORCEWAKE_KERNEL));
352
353 if (wait_for_atomic((__raw_i915_read32(dev_priv,
354 FORCEWAKE_ACK_BLITTER_GEN9) &
355 FORCEWAKE_KERNEL),
356 FORCEWAKE_ACK_TIMEOUT_MS))
357 DRM_ERROR("Timed out: waiting for Blitter to ack.\n");
358 }
359}
360
361static void
362__gen9_force_wake_put(struct drm_i915_private *dev_priv, int fw_engine)
363{
364 /* Check for Render Engine */
365 if (FORCEWAKE_RENDER & fw_engine)
366 __raw_i915_write32(dev_priv, FORCEWAKE_RENDER_GEN9,
367 _MASKED_BIT_DISABLE(FORCEWAKE_KERNEL));
368
369 /* Check for Media Engine */
370 if (FORCEWAKE_MEDIA & fw_engine)
371 __raw_i915_write32(dev_priv, FORCEWAKE_MEDIA_GEN9,
372 _MASKED_BIT_DISABLE(FORCEWAKE_KERNEL));
373
374 /* Check for Blitter Engine */
375 if (FORCEWAKE_BLITTER & fw_engine)
376 __raw_i915_write32(dev_priv, FORCEWAKE_BLITTER_GEN9,
377 _MASKED_BIT_DISABLE(FORCEWAKE_KERNEL));
378}
379
380static void
381gen9_force_wake_get(struct drm_i915_private *dev_priv, int fw_engine)
382{
383 unsigned long irqflags;
384
385 spin_lock_irqsave(&dev_priv->uncore.lock, irqflags);
386
387 if (FORCEWAKE_RENDER & fw_engine) {
388 if (dev_priv->uncore.fw_rendercount++ == 0)
389 dev_priv->uncore.funcs.force_wake_get(dev_priv,
390 FORCEWAKE_RENDER);
391 }
392
393 if (FORCEWAKE_MEDIA & fw_engine) {
394 if (dev_priv->uncore.fw_mediacount++ == 0)
395 dev_priv->uncore.funcs.force_wake_get(dev_priv,
396 FORCEWAKE_MEDIA);
397 }
398
399 if (FORCEWAKE_BLITTER & fw_engine) {
400 if (dev_priv->uncore.fw_blittercount++ == 0)
401 dev_priv->uncore.funcs.force_wake_get(dev_priv,
402 FORCEWAKE_BLITTER);
403 }
404
405 spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags);
406}
407
408static void
409gen9_force_wake_put(struct drm_i915_private *dev_priv, int fw_engine)
410{
411 unsigned long irqflags;
412
413 spin_lock_irqsave(&dev_priv->uncore.lock, irqflags);
414
415 if (FORCEWAKE_RENDER & fw_engine) {
416 WARN_ON(dev_priv->uncore.fw_rendercount == 0);
417 if (--dev_priv->uncore.fw_rendercount == 0)
418 dev_priv->uncore.funcs.force_wake_put(dev_priv,
419 FORCEWAKE_RENDER);
420 }
421
422 if (FORCEWAKE_MEDIA & fw_engine) {
423 WARN_ON(dev_priv->uncore.fw_mediacount == 0);
424 if (--dev_priv->uncore.fw_mediacount == 0)
425 dev_priv->uncore.funcs.force_wake_put(dev_priv,
426 FORCEWAKE_MEDIA);
427 }
428
429 if (FORCEWAKE_BLITTER & fw_engine) {
430 WARN_ON(dev_priv->uncore.fw_blittercount == 0);
431 if (--dev_priv->uncore.fw_blittercount == 0)
432 dev_priv->uncore.funcs.force_wake_put(dev_priv,
433 FORCEWAKE_BLITTER);
434 }
435
436 spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags);
437}
438
8232644c 439static void gen6_force_wake_timer(unsigned long arg)
aec347ab 440{
8232644c 441 struct drm_i915_private *dev_priv = (void *)arg;
aec347ab
CW		 442 unsigned long irqflags;
443
b2ec142c
PZ		 444 assert_device_not_suspended(dev_priv);
445
aec347ab 446 spin_lock_irqsave(&dev_priv->uncore.lock, irqflags);
3123fcaf
DV		 447 WARN_ON(!dev_priv->uncore.forcewake_count);
448
aec347ab 449 if (--dev_priv->uncore.forcewake_count == 0)
c8d9a590 450 dev_priv->uncore.funcs.force_wake_put(dev_priv, FORCEWAKE_ALL);
aec347ab 451 spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags);
6d88064e
PZ		 452
453 intel_runtime_pm_put(dev_priv);
aec347ab
CW		 454}
455
156c7ca0 456void intel_uncore_forcewake_reset(struct drm_device *dev, bool restore)
ef46e0d2
DV		 457{
458 struct drm_i915_private *dev_priv = dev->dev_private;
0294ae7b
CW		 459 unsigned long irqflags;
460
9e31c2a5
ID		 461 if (del_timer_sync(&dev_priv->uncore.force_wake_timer))
462 gen6_force_wake_timer((unsigned long)dev_priv);
0294ae7b
CW		 463
464 /* Hold uncore.lock across reset to prevent any register access
465 * with forcewake not set correctly
466 */
467 spin_lock_irqsave(&dev_priv->uncore.lock, irqflags);
ef46e0d2 468
0a089e33 469 if (IS_VALLEYVIEW(dev))
ef46e0d2 470 vlv_force_wake_reset(dev_priv);
0a089e33 471 else if (IS_GEN6(dev) || IS_GEN7(dev))
ef46e0d2 472 __gen6_gt_force_wake_reset(dev_priv);
0a089e33 473
f98cd096 474 if (IS_IVYBRIDGE(dev) || IS_HASWELL(dev) || IS_BROADWELL(dev))
6a68735a 475 __gen7_gt_force_wake_mt_reset(dev_priv);
0294ae7b 476
38cff0b1
ZW		 477 if (IS_GEN9(dev))
478 __gen9_gt_force_wake_mt_reset(dev_priv);
479
0294ae7b
CW		 480 if (restore) { /* If reset with a user forcewake, try to restore */
481 unsigned fw = 0;
482
483 if (IS_VALLEYVIEW(dev)) {
484 if (dev_priv->uncore.fw_rendercount)
485 fw |= FORCEWAKE_RENDER;
486
487 if (dev_priv->uncore.fw_mediacount)
488 fw |= FORCEWAKE_MEDIA;
38cff0b1
ZW		 489 } else if (IS_GEN9(dev)) {
490 if (dev_priv->uncore.fw_rendercount)
491 fw |= FORCEWAKE_RENDER;
492
493 if (dev_priv->uncore.fw_mediacount)
494 fw |= FORCEWAKE_MEDIA;
495
496 if (dev_priv->uncore.fw_blittercount)
497 fw |= FORCEWAKE_BLITTER;
0294ae7b
CW		 498 } else {
499 if (dev_priv->uncore.forcewake_count)
500 fw = FORCEWAKE_ALL;
501 }
502
503 if (fw)
504 dev_priv->uncore.funcs.force_wake_get(dev_priv, fw);
505
506 if (IS_GEN6(dev) || IS_GEN7(dev))
507 dev_priv->uncore.fifo_count =
508 __raw_i915_read32(dev_priv, GTFIFOCTL) &
509 GT_FIFO_FREE_ENTRIES_MASK;
0294ae7b
CW		 510 }
511
512 spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags);
ef46e0d2
DV		 513}
514
ed493883
ID		 515static void __intel_uncore_early_sanitize(struct drm_device *dev,
516 bool restore_forcewake)
907b28c5
CW		 517{
518 struct drm_i915_private *dev_priv = dev->dev_private;
519
520 if (HAS_FPGA_DBG_UNCLAIMED(dev))
6af5d92f 521 __raw_i915_write32(dev_priv, FPGA_DBG, FPGA_DBG_RM_NOCLAIM);
18ce3994 522
1d2866ba 523 if ((IS_HASWELL(dev) || IS_BROADWELL(dev)) &&
18ce3994
BW		 524 (__raw_i915_read32(dev_priv, HSW_EDRAM_PRESENT) == 1)) {
525 /* The docs do not explain exactly how the calculation can be
526 * made. It is somewhat guessable, but for now, it's always
527 * 128MB.
528 * NB: We can't write IDICR yet because we do not have gt funcs
529 * set up */
530 dev_priv->ellc_size = 128;
531 DRM_INFO("Found %zuMB of eLLC\n", dev_priv->ellc_size);
532 }
907b28c5 533
97058870
VS		 534 /* clear out old GT FIFO errors */
535 if (IS_GEN6(dev) || IS_GEN7(dev))
536 __raw_i915_write32(dev_priv, GTFIFODBG,
537 __raw_i915_read32(dev_priv, GTFIFODBG));
538
10018603 539 intel_uncore_forcewake_reset(dev, restore_forcewake);
521198a2
MK		 540}
541
ed493883
ID		 542void intel_uncore_early_sanitize(struct drm_device *dev, bool restore_forcewake)
543{
544 __intel_uncore_early_sanitize(dev, restore_forcewake);
545 i915_check_and_clear_faults(dev);
546}
547
521198a2
MK		 548void intel_uncore_sanitize(struct drm_device *dev)
549{
907b28c5
CW		 550 /* BIOS often leaves RC6 enabled, but disable it for hw init */
551 intel_disable_gt_powersave(dev);
552}
553
554/*
555 * Generally this is called implicitly by the register read function. However,
556 * if some sequence requires the GT to not power down then this function should
557 * be called at the beginning of the sequence followed by a call to
558 * gen6_gt_force_wake_put() at the end of the sequence.
559 */
c8d9a590 560void gen6_gt_force_wake_get(struct drm_i915_private *dev_priv, int fw_engine)
907b28c5
CW		 561{
562 unsigned long irqflags;
563
ab484f8f
BW		 564 if (!dev_priv->uncore.funcs.force_wake_get)
565 return;
566
c8c8fb33
PZ		 567 intel_runtime_pm_get(dev_priv);
568
38cff0b1
ZW		 569 /* Redirect to Gen9 specific routine */
570 if (IS_GEN9(dev_priv->dev))
571 return gen9_force_wake_get(dev_priv, fw_engine);
572
940aece4
D		 573 /* Redirect to VLV specific routine */
574 if (IS_VALLEYVIEW(dev_priv->dev))
575 return vlv_force_wake_get(dev_priv, fw_engine);
576
907b28c5
CW		 577 spin_lock_irqsave(&dev_priv->uncore.lock, irqflags);
578 if (dev_priv->uncore.forcewake_count++ == 0)
c8d9a590 579 dev_priv->uncore.funcs.force_wake_get(dev_priv, FORCEWAKE_ALL);
907b28c5
CW		 580 spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags);
581}
582
583/*
584 * see gen6_gt_force_wake_get()
585 */
c8d9a590 586void gen6_gt_force_wake_put(struct drm_i915_private *dev_priv, int fw_engine)
907b28c5
CW		 587{
588 unsigned long irqflags;
6d88064e 589 bool delayed = false;
907b28c5 590
ab484f8f
BW		 591 if (!dev_priv->uncore.funcs.force_wake_put)
592 return;
593
38cff0b1
ZW		 594 /* Redirect to Gen9 specific routine */
595 if (IS_GEN9(dev_priv->dev)) {
596 gen9_force_wake_put(dev_priv, fw_engine);
597 goto out;
598 }
599
940aece4 600 /* Redirect to VLV specific routine */
6d88064e
PZ		 601 if (IS_VALLEYVIEW(dev_priv->dev)) {
602 vlv_force_wake_put(dev_priv, fw_engine);
603 goto out;
604 }
940aece4
D		 605
606
907b28c5 607 spin_lock_irqsave(&dev_priv->uncore.lock, irqflags);
3123fcaf
DV		 608 WARN_ON(!dev_priv->uncore.forcewake_count);
609
aec347ab
CW		 610 if (--dev_priv->uncore.forcewake_count == 0) {
611 dev_priv->uncore.forcewake_count++;
6d88064e 612 delayed = true;
8232644c
CW		 613 mod_timer_pinned(&dev_priv->uncore.force_wake_timer,
614 jiffies + 1);
aec347ab 615 }
907b28c5 616 spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags);
c8c8fb33 617
6d88064e
PZ		 618out:
619 if (!delayed)
620 intel_runtime_pm_put(dev_priv);
907b28c5
CW		 621}
622
e998c40f
PZ		 623void assert_force_wake_inactive(struct drm_i915_private *dev_priv)
624{
625 if (!dev_priv->uncore.funcs.force_wake_get)
626 return;
627
628 WARN_ON(dev_priv->uncore.forcewake_count > 0);
629}
630
907b28c5
CW		 631/* We give fast paths for the really cool registers */
632#define NEEDS_FORCE_WAKE(dev_priv, reg) \
ab484f8f 633 ((reg) < 0x40000 && (reg) != FORCEWAKE)
907b28c5 634
1938e59a 635#define REG_RANGE(reg, start, end) ((reg) >= (start) && (reg) < (end))
38fb6a40 636
1938e59a
D		 637#define FORCEWAKE_VLV_RENDER_RANGE_OFFSET(reg) \
638 (REG_RANGE((reg), 0x2000, 0x4000) || \
639 REG_RANGE((reg), 0x5000, 0x8000) || \
640 REG_RANGE((reg), 0xB000, 0x12000) || \
641 REG_RANGE((reg), 0x2E000, 0x30000))
642
643#define FORCEWAKE_VLV_MEDIA_RANGE_OFFSET(reg) \
644 (REG_RANGE((reg), 0x12000, 0x14000) || \
645 REG_RANGE((reg), 0x22000, 0x24000) || \
646 REG_RANGE((reg), 0x30000, 0x40000))
647
648#define FORCEWAKE_CHV_RENDER_RANGE_OFFSET(reg) \
649 (REG_RANGE((reg), 0x2000, 0x4000) || \
650 REG_RANGE((reg), 0x5000, 0x8000) || \
651 REG_RANGE((reg), 0x8300, 0x8500) || \
652 REG_RANGE((reg), 0xB000, 0xC000) || \
653 REG_RANGE((reg), 0xE000, 0xE800))
654
655#define FORCEWAKE_CHV_MEDIA_RANGE_OFFSET(reg) \
656 (REG_RANGE((reg), 0x8800, 0x8900) || \
657 REG_RANGE((reg), 0xD000, 0xD800) || \
658 REG_RANGE((reg), 0x12000, 0x14000) || \
659 REG_RANGE((reg), 0x1A000, 0x1C000) || \
660 REG_RANGE((reg), 0x1E800, 0x1EA00) || \
661 REG_RANGE((reg), 0x30000, 0x40000))
662
663#define FORCEWAKE_CHV_COMMON_RANGE_OFFSET(reg) \
664 (REG_RANGE((reg), 0x4000, 0x5000) || \
665 REG_RANGE((reg), 0x8000, 0x8300) || \
666 REG_RANGE((reg), 0x8500, 0x8600) || \
667 REG_RANGE((reg), 0x9000, 0xB000) || \
668 REG_RANGE((reg), 0xC000, 0xC800) || \
669 REG_RANGE((reg), 0xF000, 0x10000) || \
670 REG_RANGE((reg), 0x14000, 0x14400) || \
671 REG_RANGE((reg), 0x22000, 0x24000))
38fb6a40 672
4597a88a
ZW		 673#define FORCEWAKE_GEN9_UNCORE_RANGE_OFFSET(reg) \
674 REG_RANGE((reg), 0xC00, 0x2000)
675
676#define FORCEWAKE_GEN9_RENDER_RANGE_OFFSET(reg) \
677 (REG_RANGE((reg), 0x2000, 0x4000) || \
678 REG_RANGE((reg), 0x5200, 0x8000) || \
679 REG_RANGE((reg), 0x8300, 0x8500) || \
680 REG_RANGE((reg), 0x8C00, 0x8D00) || \
681 REG_RANGE((reg), 0xB000, 0xB480) || \
682 REG_RANGE((reg), 0xE000, 0xE800))
683
684#define FORCEWAKE_GEN9_MEDIA_RANGE_OFFSET(reg) \
685 (REG_RANGE((reg), 0x8800, 0x8A00) || \
686 REG_RANGE((reg), 0xD000, 0xD800) || \
687 REG_RANGE((reg), 0x12000, 0x14000) || \
688 REG_RANGE((reg), 0x1A000, 0x1EA00) || \
689 REG_RANGE((reg), 0x30000, 0x40000))
690
691#define FORCEWAKE_GEN9_COMMON_RANGE_OFFSET(reg) \
692 REG_RANGE((reg), 0x9400, 0x9800)
693
694#define FORCEWAKE_GEN9_BLITTER_RANGE_OFFSET(reg) \
695 ((reg) < 0x40000 &&\
696 !FORCEWAKE_GEN9_UNCORE_RANGE_OFFSET(reg) && \
697 !FORCEWAKE_GEN9_RENDER_RANGE_OFFSET(reg) && \
698 !FORCEWAKE_GEN9_MEDIA_RANGE_OFFSET(reg) && \
699 !FORCEWAKE_GEN9_COMMON_RANGE_OFFSET(reg))
700
907b28c5
CW		 701static void
702ilk_dummy_write(struct drm_i915_private *dev_priv)
703{
704 /* WaIssueDummyWriteToWakeupFromRC6:ilk Issue a dummy write to wake up
705 * the chip from rc6 before touching it for real. MI_MODE is masked,
706 * hence harmless to write 0 into. */
6af5d92f 707 __raw_i915_write32(dev_priv, MI_MODE, 0);
907b28c5
CW		 708}
709
710static void
5978118c
PZ		 711hsw_unclaimed_reg_debug(struct drm_i915_private *dev_priv, u32 reg, bool read,
712 bool before)
907b28c5 713{
5978118c
PZ		 714 const char *op = read ? "reading" : "writing to";
715 const char *when = before ? "before" : "after";
716
717 if (!i915.mmio_debug)
718 return;
719
ab484f8f 720 if (__raw_i915_read32(dev_priv, FPGA_DBG) & FPGA_DBG_RM_NOCLAIM) {
5978118c
PZ		 721 WARN(1, "Unclaimed register detected %s %s register 0x%x\n",
722 when, op, reg);
6af5d92f 723 __raw_i915_write32(dev_priv, FPGA_DBG, FPGA_DBG_RM_NOCLAIM);
907b28c5
CW		 724 }
725}
726
727static void
5978118c 728hsw_unclaimed_reg_detect(struct drm_i915_private *dev_priv)
907b28c5 729{
5978118c
PZ		 730 if (i915.mmio_debug)
731 return;
732
ab484f8f 733 if (__raw_i915_read32(dev_priv, FPGA_DBG) & FPGA_DBG_RM_NOCLAIM) {
5978118c 734 DRM_ERROR("Unclaimed register detected. Please use the i915.mmio_debug=1 to debug this problem.");
6af5d92f 735 __raw_i915_write32(dev_priv, FPGA_DBG, FPGA_DBG_RM_NOCLAIM);
907b28c5
CW		 736 }
737}
738
5d738795
BW		 739#define REG_READ_HEADER(x) \
740 unsigned long irqflags; \
741 u##x val = 0; \
6f0ea9e2 742 assert_device_not_suspended(dev_priv); \
5d738795
BW		 743 spin_lock_irqsave(&dev_priv->uncore.lock, irqflags)
744
745#define REG_READ_FOOTER \
746 spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags); \
747 trace_i915_reg_rw(false, reg, val, sizeof(val), trace); \
748 return val
749
3967018e 750#define __gen4_read(x) \
0b274481 751static u##x \
3967018e
BW		 752gen4_read##x(struct drm_i915_private *dev_priv, off_t reg, bool trace) { \
753 REG_READ_HEADER(x); \
754 val = __raw_i915_read##x(dev_priv, reg); \
755 REG_READ_FOOTER; \
756}
757
758#define __gen5_read(x) \
759static u##x \
760gen5_read##x(struct drm_i915_private *dev_priv, off_t reg, bool trace) { \
761 REG_READ_HEADER(x); \
762 ilk_dummy_write(dev_priv); \
763 val = __raw_i915_read##x(dev_priv, reg); \
764 REG_READ_FOOTER; \
765}
766
767#define __gen6_read(x) \
768static u##x \
769gen6_read##x(struct drm_i915_private *dev_priv, off_t reg, bool trace) { \
5d738795 770 REG_READ_HEADER(x); \
5978118c 771 hsw_unclaimed_reg_debug(dev_priv, reg, true, true); \
8232644c
CW		 772 if (dev_priv->uncore.forcewake_count == 0 && \
773 NEEDS_FORCE_WAKE((dev_priv), (reg))) { \
774 dev_priv->uncore.funcs.force_wake_get(dev_priv, \
775 FORCEWAKE_ALL); \
aa0b3b5b
PZ		 776 val = __raw_i915_read##x(dev_priv, reg); \
777 dev_priv->uncore.funcs.force_wake_put(dev_priv, \
778 FORCEWAKE_ALL); \
779 } else { \
780 val = __raw_i915_read##x(dev_priv, reg); \
907b28c5 781 } \
5978118c 782 hsw_unclaimed_reg_debug(dev_priv, reg, true, false); \
5d738795 783 REG_READ_FOOTER; \
907b28c5
CW		 784}
785
940aece4
D		 786#define __vlv_read(x) \
787static u##x \
788vlv_read##x(struct drm_i915_private *dev_priv, off_t reg, bool trace) { \
789 unsigned fwengine = 0; \
940aece4 790 REG_READ_HEADER(x); \
6fe72865
VS		 791 if (FORCEWAKE_VLV_RENDER_RANGE_OFFSET(reg)) { \
792 if (dev_priv->uncore.fw_rendercount == 0) \
793 fwengine = FORCEWAKE_RENDER; \
794 } else if (FORCEWAKE_VLV_MEDIA_RANGE_OFFSET(reg)) { \
795 if (dev_priv->uncore.fw_mediacount == 0) \
796 fwengine = FORCEWAKE_MEDIA; \
940aece4 797 } \
6fe72865
VS		 798 if (fwengine) \
799 dev_priv->uncore.funcs.force_wake_get(dev_priv, fwengine); \
800 val = __raw_i915_read##x(dev_priv, reg); \
801 if (fwengine) \
802 dev_priv->uncore.funcs.force_wake_put(dev_priv, fwengine); \
940aece4
D		 803 REG_READ_FOOTER; \
804}
805
1938e59a
D		 806#define __chv_read(x) \
807static u##x \
808chv_read##x(struct drm_i915_private *dev_priv, off_t reg, bool trace) { \
809 unsigned fwengine = 0; \
810 REG_READ_HEADER(x); \
811 if (FORCEWAKE_CHV_RENDER_RANGE_OFFSET(reg)) { \
812 if (dev_priv->uncore.fw_rendercount == 0) \
813 fwengine = FORCEWAKE_RENDER; \
814 } else if (FORCEWAKE_CHV_MEDIA_RANGE_OFFSET(reg)) { \
815 if (dev_priv->uncore.fw_mediacount == 0) \
816 fwengine = FORCEWAKE_MEDIA; \
817 } else if (FORCEWAKE_CHV_COMMON_RANGE_OFFSET(reg)) { \
818 if (dev_priv->uncore.fw_rendercount == 0) \
819 fwengine |= FORCEWAKE_RENDER; \
820 if (dev_priv->uncore.fw_mediacount == 0) \
821 fwengine |= FORCEWAKE_MEDIA; \
822 } \
823 if (fwengine) \
824 dev_priv->uncore.funcs.force_wake_get(dev_priv, fwengine); \
825 val = __raw_i915_read##x(dev_priv, reg); \
826 if (fwengine) \
827 dev_priv->uncore.funcs.force_wake_put(dev_priv, fwengine); \
828 REG_READ_FOOTER; \
829}
940aece4 830
4597a88a
ZW		 831#define SKL_NEEDS_FORCE_WAKE(dev_priv, reg) \
832 ((reg) < 0x40000 && !FORCEWAKE_GEN9_UNCORE_RANGE_OFFSET(reg))
833
834#define __gen9_read(x) \
835static u##x \
836gen9_read##x(struct drm_i915_private *dev_priv, off_t reg, bool trace) { \
837 REG_READ_HEADER(x); \
838 if (!SKL_NEEDS_FORCE_WAKE((dev_priv), (reg))) { \
839 val = __raw_i915_read##x(dev_priv, reg); \
840 } else { \
841 unsigned fwengine = 0; \
842 if (FORCEWAKE_GEN9_RENDER_RANGE_OFFSET(reg)) { \
843 if (dev_priv->uncore.fw_rendercount == 0) \
844 fwengine = FORCEWAKE_RENDER; \
845 } else if (FORCEWAKE_GEN9_MEDIA_RANGE_OFFSET(reg)) { \
846 if (dev_priv->uncore.fw_mediacount == 0) \
847 fwengine = FORCEWAKE_MEDIA; \
848 } else if (FORCEWAKE_GEN9_COMMON_RANGE_OFFSET(reg)) { \
849 if (dev_priv->uncore.fw_rendercount == 0) \
850 fwengine |= FORCEWAKE_RENDER; \
851 if (dev_priv->uncore.fw_mediacount == 0) \
852 fwengine |= FORCEWAKE_MEDIA; \
853 } else { \
854 if (dev_priv->uncore.fw_blittercount == 0) \
855 fwengine = FORCEWAKE_BLITTER; \
856 } \
857 if (fwengine) \
858 dev_priv->uncore.funcs.force_wake_get(dev_priv, fwengine); \
859 val = __raw_i915_read##x(dev_priv, reg); \
860 if (fwengine) \
861 dev_priv->uncore.funcs.force_wake_put(dev_priv, fwengine); \
862 } \
863 REG_READ_FOOTER; \
864}
865
866__gen9_read(8)
867__gen9_read(16)
868__gen9_read(32)
869__gen9_read(64)
1938e59a
D		 870__chv_read(8)
871__chv_read(16)
872__chv_read(32)
873__chv_read(64)
940aece4
D		 874__vlv_read(8)
875__vlv_read(16)
876__vlv_read(32)
877__vlv_read(64)
3967018e
BW		 878__gen6_read(8)
879__gen6_read(16)
880__gen6_read(32)
881__gen6_read(64)
882__gen5_read(8)
883__gen5_read(16)
884__gen5_read(32)
885__gen5_read(64)
886__gen4_read(8)
887__gen4_read(16)
888__gen4_read(32)
889__gen4_read(64)
890
4597a88a 891#undef __gen9_read
1938e59a 892#undef __chv_read
940aece4 893#undef __vlv_read
3967018e
BW		 894#undef __gen6_read
895#undef __gen5_read
896#undef __gen4_read
5d738795
BW		 897#undef REG_READ_FOOTER
898#undef REG_READ_HEADER
899
900#define REG_WRITE_HEADER \
901 unsigned long irqflags; \
902 trace_i915_reg_rw(true, reg, val, sizeof(val), trace); \
6f0ea9e2 903 assert_device_not_suspended(dev_priv); \
5d738795 904 spin_lock_irqsave(&dev_priv->uncore.lock, irqflags)
907b28c5 905
0d965301
VS		 906#define REG_WRITE_FOOTER \
907 spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags)
908
4032ef43 909#define __gen4_write(x) \
0b274481 910static void \
4032ef43
BW		 911gen4_write##x(struct drm_i915_private *dev_priv, off_t reg, u##x val, bool trace) { \
912 REG_WRITE_HEADER; \
913 __raw_i915_write##x(dev_priv, reg, val); \
0d965301 914 REG_WRITE_FOOTER; \
4032ef43
BW		 915}
916
917#define __gen5_write(x) \
918static void \
919gen5_write##x(struct drm_i915_private *dev_priv, off_t reg, u##x val, bool trace) { \
920 REG_WRITE_HEADER; \
921 ilk_dummy_write(dev_priv); \
922 __raw_i915_write##x(dev_priv, reg, val); \
0d965301 923 REG_WRITE_FOOTER; \
4032ef43
BW		 924}
925
926#define __gen6_write(x) \
927static void \
928gen6_write##x(struct drm_i915_private *dev_priv, off_t reg, u##x val, bool trace) { \
929 u32 __fifo_ret = 0; \
930 REG_WRITE_HEADER; \
931 if (NEEDS_FORCE_WAKE((dev_priv), (reg))) { \
932 __fifo_ret = __gen6_gt_wait_for_fifo(dev_priv); \
933 } \
934 __raw_i915_write##x(dev_priv, reg, val); \
935 if (unlikely(__fifo_ret)) { \
936 gen6_gt_check_fifodbg(dev_priv); \
937 } \
0d965301 938 REG_WRITE_FOOTER; \
4032ef43
BW		 939}
940
941#define __hsw_write(x) \
942static void \
943hsw_write##x(struct drm_i915_private *dev_priv, off_t reg, u##x val, bool trace) { \
907b28c5 944 u32 __fifo_ret = 0; \
5d738795 945 REG_WRITE_HEADER; \
907b28c5
CW		 946 if (NEEDS_FORCE_WAKE((dev_priv), (reg))) { \
947 __fifo_ret = __gen6_gt_wait_for_fifo(dev_priv); \
948 } \
5978118c 949 hsw_unclaimed_reg_debug(dev_priv, reg, false, true); \
6af5d92f 950 __raw_i915_write##x(dev_priv, reg, val); \
907b28c5
CW		 951 if (unlikely(__fifo_ret)) { \
952 gen6_gt_check_fifodbg(dev_priv); \
953 } \
5978118c
PZ		 954 hsw_unclaimed_reg_debug(dev_priv, reg, false, false); \
955 hsw_unclaimed_reg_detect(dev_priv); \
0d965301 956 REG_WRITE_FOOTER; \
907b28c5 957}
3967018e 958
ab2aa47e
BW		 959static const u32 gen8_shadowed_regs[] = {
960 FORCEWAKE_MT,
961 GEN6_RPNSWREQ,
962 GEN6_RC_VIDEO_FREQ,
963 RING_TAIL(RENDER_RING_BASE),
964 RING_TAIL(GEN6_BSD_RING_BASE),
965 RING_TAIL(VEBOX_RING_BASE),
966 RING_TAIL(BLT_RING_BASE),
967 /* TODO: Other registers are not yet used */
968};
969
970static bool is_gen8_shadowed(struct drm_i915_private *dev_priv, u32 reg)
971{
972 int i;
973 for (i = 0; i < ARRAY_SIZE(gen8_shadowed_regs); i++)
974 if (reg == gen8_shadowed_regs[i])
975 return true;
976
977 return false;
978}
979
980#define __gen8_write(x) \
981static void \
982gen8_write##x(struct drm_i915_private *dev_priv, off_t reg, u##x val, bool trace) { \
ab2aa47e 983 REG_WRITE_HEADER; \
66bc2cab 984 hsw_unclaimed_reg_debug(dev_priv, reg, false, true); \
e9dbd2b2
MK		 985 if (reg < 0x40000 && !is_gen8_shadowed(dev_priv, reg)) { \
986 if (dev_priv->uncore.forcewake_count == 0) \
987 dev_priv->uncore.funcs.force_wake_get(dev_priv, \
988 FORCEWAKE_ALL); \
989 __raw_i915_write##x(dev_priv, reg, val); \
990 if (dev_priv->uncore.forcewake_count == 0) \
991 dev_priv->uncore.funcs.force_wake_put(dev_priv, \
992 FORCEWAKE_ALL); \
993 } else { \
994 __raw_i915_write##x(dev_priv, reg, val); \
ab2aa47e 995 } \
66bc2cab
PZ		 996 hsw_unclaimed_reg_debug(dev_priv, reg, false, false); \
997 hsw_unclaimed_reg_detect(dev_priv); \
0d965301 998 REG_WRITE_FOOTER; \
ab2aa47e
BW		 999}
1000
1938e59a
D		 1001#define __chv_write(x) \
1002static void \
1003chv_write##x(struct drm_i915_private *dev_priv, off_t reg, u##x val, bool trace) { \
1004 unsigned fwengine = 0; \
1005 bool shadowed = is_gen8_shadowed(dev_priv, reg); \
1006 REG_WRITE_HEADER; \
1007 if (!shadowed) { \
1008 if (FORCEWAKE_CHV_RENDER_RANGE_OFFSET(reg)) { \
1009 if (dev_priv->uncore.fw_rendercount == 0) \
1010 fwengine = FORCEWAKE_RENDER; \
1011 } else if (FORCEWAKE_CHV_MEDIA_RANGE_OFFSET(reg)) { \
1012 if (dev_priv->uncore.fw_mediacount == 0) \
1013 fwengine = FORCEWAKE_MEDIA; \
1014 } else if (FORCEWAKE_CHV_COMMON_RANGE_OFFSET(reg)) { \
1015 if (dev_priv->uncore.fw_rendercount == 0) \
1016 fwengine |= FORCEWAKE_RENDER; \
1017 if (dev_priv->uncore.fw_mediacount == 0) \
1018 fwengine |= FORCEWAKE_MEDIA; \
1019 } \
1020 } \
1021 if (fwengine) \
1022 dev_priv->uncore.funcs.force_wake_get(dev_priv, fwengine); \
1023 __raw_i915_write##x(dev_priv, reg, val); \
1024 if (fwengine) \
1025 dev_priv->uncore.funcs.force_wake_put(dev_priv, fwengine); \
1026 REG_WRITE_FOOTER; \
1027}
1028
7c859007
ZW		 1029static const u32 gen9_shadowed_regs[] = {
1030 RING_TAIL(RENDER_RING_BASE),
1031 RING_TAIL(GEN6_BSD_RING_BASE),
1032 RING_TAIL(VEBOX_RING_BASE),
1033 RING_TAIL(BLT_RING_BASE),
1034 FORCEWAKE_BLITTER_GEN9,
1035 FORCEWAKE_RENDER_GEN9,
1036 FORCEWAKE_MEDIA_GEN9,
1037 GEN6_RPNSWREQ,
1038 GEN6_RC_VIDEO_FREQ,
1039 /* TODO: Other registers are not yet used */
1040};
1041
1042static bool is_gen9_shadowed(struct drm_i915_private *dev_priv, u32 reg)
1043{
1044 int i;
1045 for (i = 0; i < ARRAY_SIZE(gen9_shadowed_regs); i++)
1046 if (reg == gen9_shadowed_regs[i])
1047 return true;
1048
1049 return false;
1050}
1051
4597a88a
ZW		 1052#define __gen9_write(x) \
1053static void \
1054gen9_write##x(struct drm_i915_private *dev_priv, off_t reg, u##x val, \
1055 bool trace) { \
1056 REG_WRITE_HEADER; \
7c859007
ZW		 1057 if (!SKL_NEEDS_FORCE_WAKE((dev_priv), (reg)) || \
1058 is_gen9_shadowed(dev_priv, reg)) { \
4597a88a
ZW		 1059 __raw_i915_write##x(dev_priv, reg, val); \
1060 } else { \
1061 unsigned fwengine = 0; \
1062 if (FORCEWAKE_GEN9_RENDER_RANGE_OFFSET(reg)) { \
1063 if (dev_priv->uncore.fw_rendercount == 0) \
1064 fwengine = FORCEWAKE_RENDER; \
1065 } else if (FORCEWAKE_GEN9_MEDIA_RANGE_OFFSET(reg)) { \
1066 if (dev_priv->uncore.fw_mediacount == 0) \
1067 fwengine = FORCEWAKE_MEDIA; \
1068 } else if (FORCEWAKE_GEN9_COMMON_RANGE_OFFSET(reg)) { \
1069 if (dev_priv->uncore.fw_rendercount == 0) \
1070 fwengine |= FORCEWAKE_RENDER; \
1071 if (dev_priv->uncore.fw_mediacount == 0) \
1072 fwengine |= FORCEWAKE_MEDIA; \
1073 } else { \
1074 if (dev_priv->uncore.fw_blittercount == 0) \
1075 fwengine = FORCEWAKE_BLITTER; \
1076 } \
1077 if (fwengine) \
1078 dev_priv->uncore.funcs.force_wake_get(dev_priv, \
1079 fwengine); \
1080 __raw_i915_write##x(dev_priv, reg, val); \
1081 if (fwengine) \
1082 dev_priv->uncore.funcs.force_wake_put(dev_priv, \
1083 fwengine); \
1084 } \
1085 REG_WRITE_FOOTER; \
1086}
1087
1088__gen9_write(8)
1089__gen9_write(16)
1090__gen9_write(32)
1091__gen9_write(64)
1938e59a
D		 1092__chv_write(8)
1093__chv_write(16)
1094__chv_write(32)
1095__chv_write(64)
ab2aa47e
BW		 1096__gen8_write(8)
1097__gen8_write(16)
1098__gen8_write(32)
1099__gen8_write(64)
4032ef43
BW		 1100__hsw_write(8)
1101__hsw_write(16)
1102__hsw_write(32)
1103__hsw_write(64)
1104__gen6_write(8)
1105__gen6_write(16)
1106__gen6_write(32)
1107__gen6_write(64)
1108__gen5_write(8)
1109__gen5_write(16)
1110__gen5_write(32)
1111__gen5_write(64)
1112__gen4_write(8)
1113__gen4_write(16)
1114__gen4_write(32)
1115__gen4_write(64)
1116
4597a88a 1117#undef __gen9_write
1938e59a 1118#undef __chv_write
ab2aa47e 1119#undef __gen8_write
4032ef43
BW		 1120#undef __hsw_write
1121#undef __gen6_write
1122#undef __gen5_write
1123#undef __gen4_write
0d965301 1124#undef REG_WRITE_FOOTER
5d738795 1125#undef REG_WRITE_HEADER
907b28c5 1126
43d942a7
YZ		 1127#define ASSIGN_WRITE_MMIO_VFUNCS(x) \
1128do { \
1129 dev_priv->uncore.funcs.mmio_writeb = x##_write8; \
1130 dev_priv->uncore.funcs.mmio_writew = x##_write16; \
1131 dev_priv->uncore.funcs.mmio_writel = x##_write32; \
1132 dev_priv->uncore.funcs.mmio_writeq = x##_write64; \
1133} while (0)
1134
1135#define ASSIGN_READ_MMIO_VFUNCS(x) \
1136do { \
1137 dev_priv->uncore.funcs.mmio_readb = x##_read8; \
1138 dev_priv->uncore.funcs.mmio_readw = x##_read16; \
1139 dev_priv->uncore.funcs.mmio_readl = x##_read32; \
1140 dev_priv->uncore.funcs.mmio_readq = x##_read64; \
1141} while (0)
1142
0b274481
BW		 1143void intel_uncore_init(struct drm_device *dev)
1144{
1145 struct drm_i915_private *dev_priv = dev->dev_private;
1146
8232644c
CW		 1147 setup_timer(&dev_priv->uncore.force_wake_timer,
1148 gen6_force_wake_timer, (unsigned long)dev_priv);
0b274481 1149
ed493883 1150 __intel_uncore_early_sanitize(dev, false);
05efeebd 1151
38cff0b1
ZW		 1152 if (IS_GEN9(dev)) {
1153 dev_priv->uncore.funcs.force_wake_get = __gen9_force_wake_get;
1154 dev_priv->uncore.funcs.force_wake_put = __gen9_force_wake_put;
1155 } else if (IS_VALLEYVIEW(dev)) {
940aece4
D		 1156 dev_priv->uncore.funcs.force_wake_get = __vlv_force_wake_get;
1157 dev_priv->uncore.funcs.force_wake_put = __vlv_force_wake_put;
f98cd096 1158 } else if (IS_HASWELL(dev) || IS_BROADWELL(dev)) {
6a68735a
MK		 1159 dev_priv->uncore.funcs.force_wake_get = __gen7_gt_force_wake_mt_get;
1160 dev_priv->uncore.funcs.force_wake_put = __gen7_gt_force_wake_mt_put;
0b274481
BW		 1161 } else if (IS_IVYBRIDGE(dev)) {
1162 u32 ecobus;
1163
1164 /* IVB configs may use multi-threaded forcewake */
1165
1166 /* A small trick here - if the bios hasn't configured
1167 * MT forcewake, and if the device is in RC6, then
1168 * force_wake_mt_get will not wake the device and the
1169 * ECOBUS read will return zero. Which will be
1170 * (correctly) interpreted by the test below as MT
1171 * forcewake being disabled.
1172 */
1173 mutex_lock(&dev->struct_mutex);
6a68735a 1174 __gen7_gt_force_wake_mt_get(dev_priv, FORCEWAKE_ALL);
0b274481 1175 ecobus = __raw_i915_read32(dev_priv, ECOBUS);
6a68735a 1176 __gen7_gt_force_wake_mt_put(dev_priv, FORCEWAKE_ALL);
0b274481
BW		 1177 mutex_unlock(&dev->struct_mutex);
1178
1179 if (ecobus & FORCEWAKE_MT_ENABLE) {
1180 dev_priv->uncore.funcs.force_wake_get =
6a68735a 1181 __gen7_gt_force_wake_mt_get;
0b274481 1182 dev_priv->uncore.funcs.force_wake_put =
6a68735a 1183 __gen7_gt_force_wake_mt_put;
0b274481
BW		 1184 } else {
1185 DRM_INFO("No MT forcewake available on Ivybridge, this can result in issues\n");
1186 DRM_INFO("when using vblank-synced partial screen updates.\n");
1187 dev_priv->uncore.funcs.force_wake_get =
1188 __gen6_gt_force_wake_get;
1189 dev_priv->uncore.funcs.force_wake_put =
1190 __gen6_gt_force_wake_put;
1191 }
1192 } else if (IS_GEN6(dev)) {
1193 dev_priv->uncore.funcs.force_wake_get =
1194 __gen6_gt_force_wake_get;
1195 dev_priv->uncore.funcs.force_wake_put =
1196 __gen6_gt_force_wake_put;
1197 }
1198
3967018e 1199 switch (INTEL_INFO(dev)->gen) {
ab2aa47e 1200 default:
4597a88a
ZW		 1201 WARN_ON(1);
1202 return;
1203 case 9:
1204 ASSIGN_WRITE_MMIO_VFUNCS(gen9);
1205 ASSIGN_READ_MMIO_VFUNCS(gen9);
1206 break;
1207 case 8:
1938e59a 1208 if (IS_CHERRYVIEW(dev)) {
43d942a7
YZ		 1209 ASSIGN_WRITE_MMIO_VFUNCS(chv);
1210 ASSIGN_READ_MMIO_VFUNCS(chv);
1938e59a
D		 1211
1212 } else {
43d942a7
YZ		 1213 ASSIGN_WRITE_MMIO_VFUNCS(gen8);
1214 ASSIGN_READ_MMIO_VFUNCS(gen6);
1938e59a 1215 }
ab2aa47e 1216 break;
3967018e
BW		 1217 case 7:
1218 case 6:
4032ef43 1219 if (IS_HASWELL(dev)) {
43d942a7 1220 ASSIGN_WRITE_MMIO_VFUNCS(hsw);
4032ef43 1221 } else {
43d942a7 1222 ASSIGN_WRITE_MMIO_VFUNCS(gen6);
4032ef43 1223 }
940aece4
D		 1224
1225 if (IS_VALLEYVIEW(dev)) {
43d942a7 1226 ASSIGN_READ_MMIO_VFUNCS(vlv);
940aece4 1227 } else {
43d942a7 1228 ASSIGN_READ_MMIO_VFUNCS(gen6);
940aece4 1229 }
3967018e
BW		 1230 break;
1231 case 5:
43d942a7
YZ		 1232 ASSIGN_WRITE_MMIO_VFUNCS(gen5);
1233 ASSIGN_READ_MMIO_VFUNCS(gen5);
3967018e
BW		 1234 break;
1235 case 4:
1236 case 3:
1237 case 2:
43d942a7
YZ		 1238 ASSIGN_WRITE_MMIO_VFUNCS(gen4);
1239 ASSIGN_READ_MMIO_VFUNCS(gen4);
3967018e
BW		 1240 break;
1241 }
ed493883
ID		 1242
1243 i915_check_and_clear_faults(dev);
0b274481 1244}
43d942a7
YZ		 1245#undef ASSIGN_WRITE_MMIO_VFUNCS
1246#undef ASSIGN_READ_MMIO_VFUNCS
0b274481
BW		 1247
1248void intel_uncore_fini(struct drm_device *dev)
1249{
0b274481
BW		 1250 /* Paranoia: make sure we have disabled everything before we exit. */
1251 intel_uncore_sanitize(dev);
0294ae7b 1252 intel_uncore_forcewake_reset(dev, false);
0b274481
BW		 1253}
1254
af76ae44
DL		 1255#define GEN_RANGE(l, h) GENMASK(h, l)
1256
907b28c5
CW		 1257static const struct register_whitelist {
1258 uint64_t offset;
1259 uint32_t size;
af76ae44
DL		 1260 /* supported gens, 0x10 for 4, 0x30 for 4 and 5, etc. */
1261 uint32_t gen_bitmask;
907b28c5 1262} whitelist[] = {
c3f59a67 1263 { RING_TIMESTAMP(RENDER_RING_BASE), 8, GEN_RANGE(4, 9) },
907b28c5
CW		 1264};
1265
1266int i915_reg_read_ioctl(struct drm_device *dev,
1267 void *data, struct drm_file *file)
1268{
1269 struct drm_i915_private *dev_priv = dev->dev_private;
1270 struct drm_i915_reg_read *reg = data;
1271 struct register_whitelist const *entry = whitelist;
cf67c70f 1272 int i, ret = 0;
907b28c5
CW		 1273
1274 for (i = 0; i < ARRAY_SIZE(whitelist); i++, entry++) {
1275 if (entry->offset == reg->offset &&
1276 (1 << INTEL_INFO(dev)->gen & entry->gen_bitmask))
1277 break;
1278 }
1279
1280 if (i == ARRAY_SIZE(whitelist))
1281 return -EINVAL;
1282
cf67c70f
PZ		 1283 intel_runtime_pm_get(dev_priv);
1284
907b28c5
CW		 1285 switch (entry->size) {
1286 case 8:
1287 reg->val = I915_READ64(reg->offset);
1288 break;
1289 case 4:
1290 reg->val = I915_READ(reg->offset);
1291 break;
1292 case 2:
1293 reg->val = I915_READ16(reg->offset);
1294 break;
1295 case 1:
1296 reg->val = I915_READ8(reg->offset);
1297 break;
1298 default:
1299 WARN_ON(1);
cf67c70f
PZ		 1300 ret = -EINVAL;
1301 goto out;
907b28c5
CW		 1302 }
1303
cf67c70f
PZ		 1304out:
1305 intel_runtime_pm_put(dev_priv);
1306 return ret;
907b28c5
CW		 1307}
1308
b6359918
MK		 1309int i915_get_reset_stats_ioctl(struct drm_device *dev,
1310 void *data, struct drm_file *file)
1311{
1312 struct drm_i915_private *dev_priv = dev->dev_private;
1313 struct drm_i915_reset_stats *args = data;
1314 struct i915_ctx_hang_stats *hs;
273497e5 1315 struct intel_context *ctx;
b6359918
MK		 1316 int ret;
1317
661df041
MK		 1318 if (args->flags || args->pad)
1319 return -EINVAL;
1320
821d66dd 1321 if (args->ctx_id == DEFAULT_CONTEXT_HANDLE && !capable(CAP_SYS_ADMIN))
b6359918
MK		 1322 return -EPERM;
1323
1324 ret = mutex_lock_interruptible(&dev->struct_mutex);
1325 if (ret)
1326 return ret;
1327
41bde553
BW		 1328 ctx = i915_gem_context_get(file->driver_priv, args->ctx_id);
1329 if (IS_ERR(ctx)) {
b6359918 1330 mutex_unlock(&dev->struct_mutex);
41bde553 1331 return PTR_ERR(ctx);
b6359918 1332 }
41bde553 1333 hs = &ctx->hang_stats;
b6359918
MK		 1334
1335 if (capable(CAP_SYS_ADMIN))
1336 args->reset_count = i915_reset_count(&dev_priv->gpu_error);
1337 else
1338 args->reset_count = 0;
1339
1340 args->batch_active = hs->batch_active;
1341 args->batch_pending = hs->batch_pending;
1342
1343 mutex_unlock(&dev->struct_mutex);
1344
1345 return 0;
1346}
1347
907b28c5
CW		 1348static int i965_reset_complete(struct drm_device *dev)
1349{
1350 u8 gdrst;
1351 pci_read_config_byte(dev->pdev, I965_GDRST, &gdrst);
1352 return (gdrst & GRDOM_RESET_ENABLE) == 0;
1353}
1354
1355static int i965_do_reset(struct drm_device *dev)
1356{
1357 int ret;
1358
85ab3998
DV		 1359 /* FIXME: i965g/gm need a display save/restore for gpu reset. */
1360 return -ENODEV;
1361
907b28c5
CW		 1362 /*
1363 * Set the domains we want to reset (GRDOM/bits 2 and 3) as
1364 * well as the reset bit (GR/bit 0). Setting the GR bit
1365 * triggers the reset; when done, the hardware will clear it.
1366 */
1367 pci_write_config_byte(dev->pdev, I965_GDRST,
1368 GRDOM_RENDER | GRDOM_RESET_ENABLE);
1369 ret = wait_for(i965_reset_complete(dev), 500);
1370 if (ret)
1371 return ret;
1372
907b28c5
CW		 1373 pci_write_config_byte(dev->pdev, I965_GDRST,
1374 GRDOM_MEDIA | GRDOM_RESET_ENABLE);
1375
1376 ret = wait_for(i965_reset_complete(dev), 500);
1377 if (ret)
1378 return ret;
1379
1380 pci_write_config_byte(dev->pdev, I965_GDRST, 0);
1381
1382 return 0;
1383}
1384
fa4f53c4
VS		 1385static int g4x_do_reset(struct drm_device *dev)
1386{
1387 struct drm_i915_private *dev_priv = dev->dev_private;
1388 int ret;
1389
1390 pci_write_config_byte(dev->pdev, I965_GDRST,
1391 GRDOM_RENDER | GRDOM_RESET_ENABLE);
1392 ret = wait_for(i965_reset_complete(dev), 500);
1393 if (ret)
1394 return ret;
1395
1396 /* WaVcpClkGateDisableForMediaReset:ctg,elk */
1397 I915_WRITE(VDECCLK_GATE_D, I915_READ(VDECCLK_GATE_D) | VCP_UNIT_CLOCK_GATE_DISABLE);
1398 POSTING_READ(VDECCLK_GATE_D);
1399
1400 pci_write_config_byte(dev->pdev, I965_GDRST,
1401 GRDOM_MEDIA | GRDOM_RESET_ENABLE);
1402 ret = wait_for(i965_reset_complete(dev), 500);
1403 if (ret)
1404 return ret;
1405
1406 /* WaVcpClkGateDisableForMediaReset:ctg,elk */
1407 I915_WRITE(VDECCLK_GATE_D, I915_READ(VDECCLK_GATE_D) & ~VCP_UNIT_CLOCK_GATE_DISABLE);
1408 POSTING_READ(VDECCLK_GATE_D);
1409
1410 pci_write_config_byte(dev->pdev, I965_GDRST, 0);
1411
1412 return 0;
1413}
1414
907b28c5
CW		 1415static int ironlake_do_reset(struct drm_device *dev)
1416{
1417 struct drm_i915_private *dev_priv = dev->dev_private;
907b28c5
CW		 1418 int ret;
1419
907b28c5 1420 I915_WRITE(MCHBAR_MIRROR_BASE + ILK_GDSR,
0f08ffd6 1421 ILK_GRDOM_RENDER | ILK_GRDOM_RESET_ENABLE);
f67deb72 1422 ret = wait_for((I915_READ(MCHBAR_MIRROR_BASE + ILK_GDSR) &
b3a3f03d 1423 ILK_GRDOM_RESET_ENABLE) == 0, 500);
907b28c5
CW		 1424 if (ret)
1425 return ret;
1426
907b28c5 1427 I915_WRITE(MCHBAR_MIRROR_BASE + ILK_GDSR,
0f08ffd6 1428 ILK_GRDOM_MEDIA | ILK_GRDOM_RESET_ENABLE);
9aa7250f
VS		 1429 ret = wait_for((I915_READ(MCHBAR_MIRROR_BASE + ILK_GDSR) &
1430 ILK_GRDOM_RESET_ENABLE) == 0, 500);
1431 if (ret)
1432 return ret;
1433
1434 I915_WRITE(MCHBAR_MIRROR_BASE + ILK_GDSR, 0);
1435
1436 return 0;
907b28c5
CW		 1437}
1438
1439static int gen6_do_reset(struct drm_device *dev)
1440{
1441 struct drm_i915_private *dev_priv = dev->dev_private;
1442 int ret;
907b28c5
CW		 1443
1444 /* Reset the chip */
1445
1446 /* GEN6_GDRST is not in the gt power well, no need to check
1447 * for fifo space for the write or forcewake the chip for
1448 * the read
1449 */
6af5d92f 1450 __raw_i915_write32(dev_priv, GEN6_GDRST, GEN6_GRDOM_FULL);
907b28c5
CW		 1451
1452 /* Spin waiting for the device to ack the reset request */
6af5d92f 1453 ret = wait_for((__raw_i915_read32(dev_priv, GEN6_GDRST) & GEN6_GRDOM_FULL) == 0, 500);
907b28c5 1454
0294ae7b 1455 intel_uncore_forcewake_reset(dev, true);
5babf0fc 1456
907b28c5
CW		 1457 return ret;
1458}
1459
1460int intel_gpu_reset(struct drm_device *dev)
1461{
542c184f
RB		 1462 if (INTEL_INFO(dev)->gen >= 6)
1463 return gen6_do_reset(dev);
1464 else if (IS_GEN5(dev))
1465 return ironlake_do_reset(dev);
1466 else if (IS_G4X(dev))
1467 return g4x_do_reset(dev);
1468 else if (IS_GEN4(dev))
1469 return i965_do_reset(dev);
1470 else
1471 return -ENODEV;
907b28c5
CW		 1472}
1473
907b28c5
CW		 1474void intel_uncore_check_errors(struct drm_device *dev)
1475{
1476 struct drm_i915_private *dev_priv = dev->dev_private;
1477
1478 if (HAS_FPGA_DBG_UNCLAIMED(dev) &&
6af5d92f 1479 (__raw_i915_read32(dev_priv, FPGA_DBG) & FPGA_DBG_RM_NOCLAIM)) {
907b28c5 1480 DRM_ERROR("Unclaimed register before interrupt\n");
6af5d92f 1481 __raw_i915_write32(dev_priv, FPGA_DBG, FPGA_DBG_RM_NOCLAIM);
907b28c5
CW		 1482 }
1483}
Linux kernel - Deliverables
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