2 * Copyright © 2013 Intel Corporation
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:
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
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
25 #include "intel_drv.h"
27 #define FORCEWAKE_ACK_TIMEOUT_MS 2
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__))
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__))
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__))
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__))
41 #define __raw_posting_read(dev_priv__, reg__) (void)__raw_i915_read32(dev_priv__, reg__)
44 assert_device_not_suspended(struct drm_i915_private
*dev_priv
)
46 WARN_ONCE(HAS_RUNTIME_PM(dev_priv
->dev
) && dev_priv
->pm
.suspended
,
47 "Device suspended\n");
50 static void __gen6_gt_wait_for_thread_c0(struct drm_i915_private
*dev_priv
)
52 /* w/a for a sporadic read returning 0 by waiting for the GT
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))
57 DRM_ERROR("GT thread status wait timed out\n");
60 static void __gen6_gt_force_wake_reset(struct drm_i915_private
*dev_priv
)
62 __raw_i915_write32(dev_priv
, FORCEWAKE
, 0);
63 /* something from same cacheline, but !FORCEWAKE */
64 __raw_posting_read(dev_priv
, ECOBUS
);
67 static void __gen6_gt_force_wake_get(struct drm_i915_private
*dev_priv
,
70 if (wait_for_atomic((__raw_i915_read32(dev_priv
, FORCEWAKE_ACK
) & 1) == 0,
71 FORCEWAKE_ACK_TIMEOUT_MS
))
72 DRM_ERROR("Timed out waiting for forcewake old ack to clear.\n");
74 __raw_i915_write32(dev_priv
, FORCEWAKE
, 1);
75 /* something from same cacheline, but !FORCEWAKE */
76 __raw_posting_read(dev_priv
, ECOBUS
);
78 if (wait_for_atomic((__raw_i915_read32(dev_priv
, FORCEWAKE_ACK
) & 1),
79 FORCEWAKE_ACK_TIMEOUT_MS
))
80 DRM_ERROR("Timed out waiting for forcewake to ack request.\n");
82 /* WaRsForcewakeWaitTC0:snb */
83 __gen6_gt_wait_for_thread_c0(dev_priv
);
86 static void __gen7_gt_force_wake_mt_reset(struct drm_i915_private
*dev_priv
)
88 __raw_i915_write32(dev_priv
, FORCEWAKE_MT
, _MASKED_BIT_DISABLE(0xffff));
89 /* something from same cacheline, but !FORCEWAKE_MT */
90 __raw_posting_read(dev_priv
, ECOBUS
);
93 static void __gen7_gt_force_wake_mt_get(struct drm_i915_private
*dev_priv
,
98 if (IS_HASWELL(dev_priv
->dev
) || IS_BROADWELL(dev_priv
->dev
))
99 forcewake_ack
= FORCEWAKE_ACK_HSW
;
101 forcewake_ack
= FORCEWAKE_MT_ACK
;
103 if (wait_for_atomic((__raw_i915_read32(dev_priv
, forcewake_ack
) & FORCEWAKE_KERNEL
) == 0,
104 FORCEWAKE_ACK_TIMEOUT_MS
))
105 DRM_ERROR("Timed out waiting for forcewake old ack to clear.\n");
107 __raw_i915_write32(dev_priv
, FORCEWAKE_MT
,
108 _MASKED_BIT_ENABLE(FORCEWAKE_KERNEL
));
109 /* something from same cacheline, but !FORCEWAKE_MT */
110 __raw_posting_read(dev_priv
, ECOBUS
);
112 if (wait_for_atomic((__raw_i915_read32(dev_priv
, forcewake_ack
) & FORCEWAKE_KERNEL
),
113 FORCEWAKE_ACK_TIMEOUT_MS
))
114 DRM_ERROR("Timed out waiting for forcewake to ack request.\n");
116 /* WaRsForcewakeWaitTC0:ivb,hsw */
117 __gen6_gt_wait_for_thread_c0(dev_priv
);
120 static void gen6_gt_check_fifodbg(struct drm_i915_private
*dev_priv
)
124 gtfifodbg
= __raw_i915_read32(dev_priv
, GTFIFODBG
);
125 if (WARN(gtfifodbg
, "GT wake FIFO error 0x%x\n", gtfifodbg
))
126 __raw_i915_write32(dev_priv
, GTFIFODBG
, gtfifodbg
);
129 static void __gen6_gt_force_wake_put(struct drm_i915_private
*dev_priv
,
132 __raw_i915_write32(dev_priv
, FORCEWAKE
, 0);
133 /* something from same cacheline, but !FORCEWAKE */
134 __raw_posting_read(dev_priv
, ECOBUS
);
135 gen6_gt_check_fifodbg(dev_priv
);
138 static void __gen7_gt_force_wake_mt_put(struct drm_i915_private
*dev_priv
,
141 __raw_i915_write32(dev_priv
, FORCEWAKE_MT
,
142 _MASKED_BIT_DISABLE(FORCEWAKE_KERNEL
));
143 /* something from same cacheline, but !FORCEWAKE_MT */
144 __raw_posting_read(dev_priv
, ECOBUS
);
146 if (IS_GEN7(dev_priv
->dev
))
147 gen6_gt_check_fifodbg(dev_priv
);
150 static int __gen6_gt_wait_for_fifo(struct drm_i915_private
*dev_priv
)
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
;
161 if (dev_priv
->uncore
.fifo_count
< GT_FIFO_NUM_RESERVED_ENTRIES
) {
163 u32 fifo
= __raw_i915_read32(dev_priv
, GTFIFOCTL
) & GT_FIFO_FREE_ENTRIES_MASK
;
164 while (fifo
<= GT_FIFO_NUM_RESERVED_ENTRIES
&& loop
--) {
166 fifo
= __raw_i915_read32(dev_priv
, GTFIFOCTL
) & GT_FIFO_FREE_ENTRIES_MASK
;
168 if (WARN_ON(loop
< 0 && fifo
<= GT_FIFO_NUM_RESERVED_ENTRIES
))
170 dev_priv
->uncore
.fifo_count
= fifo
;
172 dev_priv
->uncore
.fifo_count
--;
177 static void vlv_force_wake_reset(struct drm_i915_private
*dev_priv
)
179 __raw_i915_write32(dev_priv
, FORCEWAKE_VLV
,
180 _MASKED_BIT_DISABLE(0xffff));
181 __raw_i915_write32(dev_priv
, FORCEWAKE_MEDIA_VLV
,
182 _MASKED_BIT_DISABLE(0xffff));
183 /* something from same cacheline, but !FORCEWAKE_VLV */
184 __raw_posting_read(dev_priv
, FORCEWAKE_ACK_VLV
);
187 static void __vlv_force_wake_get(struct drm_i915_private
*dev_priv
,
190 /* Check for Render Engine */
191 if (FORCEWAKE_RENDER
& fw_engine
) {
192 if (wait_for_atomic((__raw_i915_read32(dev_priv
,
194 FORCEWAKE_KERNEL
) == 0,
195 FORCEWAKE_ACK_TIMEOUT_MS
))
196 DRM_ERROR("Timed out: Render forcewake old ack to clear.\n");
198 __raw_i915_write32(dev_priv
, FORCEWAKE_VLV
,
199 _MASKED_BIT_ENABLE(FORCEWAKE_KERNEL
));
201 if (wait_for_atomic((__raw_i915_read32(dev_priv
,
204 FORCEWAKE_ACK_TIMEOUT_MS
))
205 DRM_ERROR("Timed out: waiting for Render to ack.\n");
208 /* Check for Media Engine */
209 if (FORCEWAKE_MEDIA
& fw_engine
) {
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");
216 __raw_i915_write32(dev_priv
, FORCEWAKE_MEDIA_VLV
,
217 _MASKED_BIT_ENABLE(FORCEWAKE_KERNEL
));
219 if (wait_for_atomic((__raw_i915_read32(dev_priv
,
220 FORCEWAKE_ACK_MEDIA_VLV
) &
222 FORCEWAKE_ACK_TIMEOUT_MS
))
223 DRM_ERROR("Timed out: waiting for media to ack.\n");
227 static void __vlv_force_wake_put(struct drm_i915_private
*dev_priv
,
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
));
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
));
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
);
248 static void vlv_force_wake_get(struct drm_i915_private
*dev_priv
, int fw_engine
)
250 unsigned long irqflags
;
252 spin_lock_irqsave(&dev_priv
->uncore
.lock
, irqflags
);
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
;
262 dev_priv
->uncore
.funcs
.force_wake_get(dev_priv
, fw_engine
);
264 spin_unlock_irqrestore(&dev_priv
->uncore
.lock
, irqflags
);
267 static void vlv_force_wake_put(struct drm_i915_private
*dev_priv
, int fw_engine
)
269 unsigned long irqflags
;
271 spin_lock_irqsave(&dev_priv
->uncore
.lock
, irqflags
);
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
;
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
;
286 dev_priv
->uncore
.funcs
.force_wake_put(dev_priv
, fw_engine
);
288 spin_unlock_irqrestore(&dev_priv
->uncore
.lock
, irqflags
);
291 static void __gen9_gt_force_wake_mt_reset(struct drm_i915_private
*dev_priv
)
293 __raw_i915_write32(dev_priv
, FORCEWAKE_RENDER_GEN9
,
294 _MASKED_BIT_DISABLE(0xffff));
296 __raw_i915_write32(dev_priv
, FORCEWAKE_MEDIA_GEN9
,
297 _MASKED_BIT_DISABLE(0xffff));
299 __raw_i915_write32(dev_priv
, FORCEWAKE_BLITTER_GEN9
,
300 _MASKED_BIT_DISABLE(0xffff));
304 __gen9_force_wake_get(struct drm_i915_private
*dev_priv
, int fw_engine
)
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");
314 __raw_i915_write32(dev_priv
, FORCEWAKE_RENDER_GEN9
,
315 _MASKED_BIT_ENABLE(FORCEWAKE_KERNEL
));
317 if (wait_for_atomic((__raw_i915_read32(dev_priv
,
318 FORCEWAKE_ACK_RENDER_GEN9
) &
320 FORCEWAKE_ACK_TIMEOUT_MS
))
321 DRM_ERROR("Timed out: waiting for Render to ack.\n");
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");
332 __raw_i915_write32(dev_priv
, FORCEWAKE_MEDIA_GEN9
,
333 _MASKED_BIT_ENABLE(FORCEWAKE_KERNEL
));
335 if (wait_for_atomic((__raw_i915_read32(dev_priv
,
336 FORCEWAKE_ACK_MEDIA_GEN9
) &
338 FORCEWAKE_ACK_TIMEOUT_MS
))
339 DRM_ERROR("Timed out: waiting for Media to ack.\n");
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");
350 __raw_i915_write32(dev_priv
, FORCEWAKE_BLITTER_GEN9
,
351 _MASKED_BIT_ENABLE(FORCEWAKE_KERNEL
));
353 if (wait_for_atomic((__raw_i915_read32(dev_priv
,
354 FORCEWAKE_ACK_BLITTER_GEN9
) &
356 FORCEWAKE_ACK_TIMEOUT_MS
))
357 DRM_ERROR("Timed out: waiting for Blitter to ack.\n");
362 __gen9_force_wake_put(struct drm_i915_private
*dev_priv
, int fw_engine
)
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
));
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
));
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
));
381 gen9_force_wake_get(struct drm_i915_private
*dev_priv
, int fw_engine
)
383 unsigned long irqflags
;
385 spin_lock_irqsave(&dev_priv
->uncore
.lock
, irqflags
);
387 if (FORCEWAKE_RENDER
& fw_engine
) {
388 if (dev_priv
->uncore
.fw_rendercount
++ == 0)
389 dev_priv
->uncore
.funcs
.force_wake_get(dev_priv
,
393 if (FORCEWAKE_MEDIA
& fw_engine
) {
394 if (dev_priv
->uncore
.fw_mediacount
++ == 0)
395 dev_priv
->uncore
.funcs
.force_wake_get(dev_priv
,
399 if (FORCEWAKE_BLITTER
& fw_engine
) {
400 if (dev_priv
->uncore
.fw_blittercount
++ == 0)
401 dev_priv
->uncore
.funcs
.force_wake_get(dev_priv
,
405 spin_unlock_irqrestore(&dev_priv
->uncore
.lock
, irqflags
);
409 gen9_force_wake_put(struct drm_i915_private
*dev_priv
, int fw_engine
)
411 unsigned long irqflags
;
413 spin_lock_irqsave(&dev_priv
->uncore
.lock
, irqflags
);
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
,
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
,
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
,
436 spin_unlock_irqrestore(&dev_priv
->uncore
.lock
, irqflags
);
439 static void gen6_force_wake_timer(unsigned long arg
)
441 struct drm_i915_private
*dev_priv
= (void *)arg
;
442 unsigned long irqflags
;
444 assert_device_not_suspended(dev_priv
);
446 spin_lock_irqsave(&dev_priv
->uncore
.lock
, irqflags
);
447 WARN_ON(!dev_priv
->uncore
.forcewake_count
);
449 if (--dev_priv
->uncore
.forcewake_count
== 0)
450 dev_priv
->uncore
.funcs
.force_wake_put(dev_priv
, FORCEWAKE_ALL
);
451 spin_unlock_irqrestore(&dev_priv
->uncore
.lock
, irqflags
);
453 intel_runtime_pm_put(dev_priv
);
456 void intel_uncore_forcewake_reset(struct drm_device
*dev
, bool restore
)
458 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
459 unsigned long irqflags
;
461 if (del_timer_sync(&dev_priv
->uncore
.force_wake_timer
))
462 gen6_force_wake_timer((unsigned long)dev_priv
);
464 /* Hold uncore.lock across reset to prevent any register access
465 * with forcewake not set correctly
467 spin_lock_irqsave(&dev_priv
->uncore
.lock
, irqflags
);
469 if (IS_VALLEYVIEW(dev
))
470 vlv_force_wake_reset(dev_priv
);
471 else if (IS_GEN6(dev
) || IS_GEN7(dev
))
472 __gen6_gt_force_wake_reset(dev_priv
);
474 if (IS_IVYBRIDGE(dev
) || IS_HASWELL(dev
) || IS_BROADWELL(dev
))
475 __gen7_gt_force_wake_mt_reset(dev_priv
);
478 __gen9_gt_force_wake_mt_reset(dev_priv
);
480 if (restore
) { /* If reset with a user forcewake, try to restore */
483 if (IS_VALLEYVIEW(dev
)) {
484 if (dev_priv
->uncore
.fw_rendercount
)
485 fw
|= FORCEWAKE_RENDER
;
487 if (dev_priv
->uncore
.fw_mediacount
)
488 fw
|= FORCEWAKE_MEDIA
;
489 } else if (IS_GEN9(dev
)) {
490 if (dev_priv
->uncore
.fw_rendercount
)
491 fw
|= FORCEWAKE_RENDER
;
493 if (dev_priv
->uncore
.fw_mediacount
)
494 fw
|= FORCEWAKE_MEDIA
;
496 if (dev_priv
->uncore
.fw_blittercount
)
497 fw
|= FORCEWAKE_BLITTER
;
499 if (dev_priv
->uncore
.forcewake_count
)
504 dev_priv
->uncore
.funcs
.force_wake_get(dev_priv
, fw
);
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
;
512 spin_unlock_irqrestore(&dev_priv
->uncore
.lock
, irqflags
);
515 static void __intel_uncore_early_sanitize(struct drm_device
*dev
,
516 bool restore_forcewake
)
518 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
520 if (HAS_FPGA_DBG_UNCLAIMED(dev
))
521 __raw_i915_write32(dev_priv
, FPGA_DBG
, FPGA_DBG_RM_NOCLAIM
);
523 if ((IS_HASWELL(dev
) || IS_BROADWELL(dev
)) &&
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
528 * NB: We can't write IDICR yet because we do not have gt funcs
530 dev_priv
->ellc_size
= 128;
531 DRM_INFO("Found %zuMB of eLLC\n", dev_priv
->ellc_size
);
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
));
539 intel_uncore_forcewake_reset(dev
, restore_forcewake
);
542 void intel_uncore_early_sanitize(struct drm_device
*dev
, bool restore_forcewake
)
544 __intel_uncore_early_sanitize(dev
, restore_forcewake
);
545 i915_check_and_clear_faults(dev
);
548 void intel_uncore_sanitize(struct drm_device
*dev
)
550 /* BIOS often leaves RC6 enabled, but disable it for hw init */
551 intel_disable_gt_powersave(dev
);
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.
560 void gen6_gt_force_wake_get(struct drm_i915_private
*dev_priv
, int fw_engine
)
562 unsigned long irqflags
;
564 if (!dev_priv
->uncore
.funcs
.force_wake_get
)
567 intel_runtime_pm_get(dev_priv
);
569 /* Redirect to Gen9 specific routine */
570 if (IS_GEN9(dev_priv
->dev
))
571 return gen9_force_wake_get(dev_priv
, fw_engine
);
573 /* Redirect to VLV specific routine */
574 if (IS_VALLEYVIEW(dev_priv
->dev
))
575 return vlv_force_wake_get(dev_priv
, fw_engine
);
577 spin_lock_irqsave(&dev_priv
->uncore
.lock
, irqflags
);
578 if (dev_priv
->uncore
.forcewake_count
++ == 0)
579 dev_priv
->uncore
.funcs
.force_wake_get(dev_priv
, FORCEWAKE_ALL
);
580 spin_unlock_irqrestore(&dev_priv
->uncore
.lock
, irqflags
);
584 * see gen6_gt_force_wake_get()
586 void gen6_gt_force_wake_put(struct drm_i915_private
*dev_priv
, int fw_engine
)
588 unsigned long irqflags
;
589 bool delayed
= false;
591 if (!dev_priv
->uncore
.funcs
.force_wake_put
)
594 /* Redirect to Gen9 specific routine */
595 if (IS_GEN9(dev_priv
->dev
)) {
596 gen9_force_wake_put(dev_priv
, fw_engine
);
600 /* Redirect to VLV specific routine */
601 if (IS_VALLEYVIEW(dev_priv
->dev
)) {
602 vlv_force_wake_put(dev_priv
, fw_engine
);
607 spin_lock_irqsave(&dev_priv
->uncore
.lock
, irqflags
);
608 WARN_ON(!dev_priv
->uncore
.forcewake_count
);
610 if (--dev_priv
->uncore
.forcewake_count
== 0) {
611 dev_priv
->uncore
.forcewake_count
++;
613 mod_timer_pinned(&dev_priv
->uncore
.force_wake_timer
,
616 spin_unlock_irqrestore(&dev_priv
->uncore
.lock
, irqflags
);
620 intel_runtime_pm_put(dev_priv
);
623 void assert_force_wake_inactive(struct drm_i915_private
*dev_priv
)
625 if (!dev_priv
->uncore
.funcs
.force_wake_get
)
628 WARN_ON(dev_priv
->uncore
.forcewake_count
> 0);
631 /* We give fast paths for the really cool registers */
632 #define NEEDS_FORCE_WAKE(dev_priv, reg) \
633 ((reg) < 0x40000 && (reg) != FORCEWAKE)
635 #define REG_RANGE(reg, start, end) ((reg) >= (start) && (reg) < (end))
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))
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))
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))
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))
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))
673 #define FORCEWAKE_GEN9_UNCORE_RANGE_OFFSET(reg) \
674 REG_RANGE((reg), 0xB00, 0x2000)
676 #define FORCEWAKE_GEN9_RENDER_RANGE_OFFSET(reg) \
677 (REG_RANGE((reg), 0x2000, 0x2700) || \
678 REG_RANGE((reg), 0x3000, 0x4000) || \
679 REG_RANGE((reg), 0x5200, 0x8000) || \
680 REG_RANGE((reg), 0x8140, 0x8160) || \
681 REG_RANGE((reg), 0x8300, 0x8500) || \
682 REG_RANGE((reg), 0x8C00, 0x8D00) || \
683 REG_RANGE((reg), 0xB000, 0xB480) || \
684 REG_RANGE((reg), 0xE000, 0xE900) || \
685 REG_RANGE((reg), 0x24400, 0x24800))
687 #define FORCEWAKE_GEN9_MEDIA_RANGE_OFFSET(reg) \
688 (REG_RANGE((reg), 0x8130, 0x8140) || \
689 REG_RANGE((reg), 0x8800, 0x8A00) || \
690 REG_RANGE((reg), 0xD000, 0xD800) || \
691 REG_RANGE((reg), 0x12000, 0x14000) || \
692 REG_RANGE((reg), 0x1A000, 0x1EA00) || \
693 REG_RANGE((reg), 0x30000, 0x40000))
695 #define FORCEWAKE_GEN9_COMMON_RANGE_OFFSET(reg) \
696 REG_RANGE((reg), 0x9400, 0x9800)
698 #define FORCEWAKE_GEN9_BLITTER_RANGE_OFFSET(reg) \
700 !FORCEWAKE_GEN9_UNCORE_RANGE_OFFSET(reg) && \
701 !FORCEWAKE_GEN9_RENDER_RANGE_OFFSET(reg) && \
702 !FORCEWAKE_GEN9_MEDIA_RANGE_OFFSET(reg) && \
703 !FORCEWAKE_GEN9_COMMON_RANGE_OFFSET(reg))
706 ilk_dummy_write(struct drm_i915_private
*dev_priv
)
708 /* WaIssueDummyWriteToWakeupFromRC6:ilk Issue a dummy write to wake up
709 * the chip from rc6 before touching it for real. MI_MODE is masked,
710 * hence harmless to write 0 into. */
711 __raw_i915_write32(dev_priv
, MI_MODE
, 0);
715 hsw_unclaimed_reg_debug(struct drm_i915_private
*dev_priv
, u32 reg
, bool read
,
718 const char *op
= read
? "reading" : "writing to";
719 const char *when
= before
? "before" : "after";
721 if (!i915
.mmio_debug
)
724 if (__raw_i915_read32(dev_priv
, FPGA_DBG
) & FPGA_DBG_RM_NOCLAIM
) {
725 WARN(1, "Unclaimed register detected %s %s register 0x%x\n",
727 __raw_i915_write32(dev_priv
, FPGA_DBG
, FPGA_DBG_RM_NOCLAIM
);
732 hsw_unclaimed_reg_detect(struct drm_i915_private
*dev_priv
)
737 if (__raw_i915_read32(dev_priv
, FPGA_DBG
) & FPGA_DBG_RM_NOCLAIM
) {
738 DRM_ERROR("Unclaimed register detected. Please use the i915.mmio_debug=1 to debug this problem.");
739 __raw_i915_write32(dev_priv
, FPGA_DBG
, FPGA_DBG_RM_NOCLAIM
);
743 #define REG_READ_HEADER(x) \
744 unsigned long irqflags; \
746 assert_device_not_suspended(dev_priv); \
747 spin_lock_irqsave(&dev_priv->uncore.lock, irqflags)
749 #define REG_READ_FOOTER \
750 spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags); \
751 trace_i915_reg_rw(false, reg, val, sizeof(val), trace); \
754 #define __gen4_read(x) \
756 gen4_read##x(struct drm_i915_private *dev_priv, off_t reg, bool trace) { \
757 REG_READ_HEADER(x); \
758 val = __raw_i915_read##x(dev_priv, reg); \
762 #define __gen5_read(x) \
764 gen5_read##x(struct drm_i915_private *dev_priv, off_t reg, bool trace) { \
765 REG_READ_HEADER(x); \
766 ilk_dummy_write(dev_priv); \
767 val = __raw_i915_read##x(dev_priv, reg); \
771 #define __gen6_read(x) \
773 gen6_read##x(struct drm_i915_private *dev_priv, off_t reg, bool trace) { \
774 REG_READ_HEADER(x); \
775 hsw_unclaimed_reg_debug(dev_priv, reg, true, true); \
776 if (dev_priv->uncore.forcewake_count == 0 && \
777 NEEDS_FORCE_WAKE((dev_priv), (reg))) { \
778 dev_priv->uncore.funcs.force_wake_get(dev_priv, \
780 val = __raw_i915_read##x(dev_priv, reg); \
781 dev_priv->uncore.funcs.force_wake_put(dev_priv, \
784 val = __raw_i915_read##x(dev_priv, reg); \
786 hsw_unclaimed_reg_debug(dev_priv, reg, true, false); \
790 #define __vlv_read(x) \
792 vlv_read##x(struct drm_i915_private *dev_priv, off_t reg, bool trace) { \
793 unsigned fwengine = 0; \
794 REG_READ_HEADER(x); \
795 if (FORCEWAKE_VLV_RENDER_RANGE_OFFSET(reg)) { \
796 if (dev_priv->uncore.fw_rendercount == 0) \
797 fwengine = FORCEWAKE_RENDER; \
798 } else if (FORCEWAKE_VLV_MEDIA_RANGE_OFFSET(reg)) { \
799 if (dev_priv->uncore.fw_mediacount == 0) \
800 fwengine = FORCEWAKE_MEDIA; \
803 dev_priv->uncore.funcs.force_wake_get(dev_priv, fwengine); \
804 val = __raw_i915_read##x(dev_priv, reg); \
806 dev_priv->uncore.funcs.force_wake_put(dev_priv, fwengine); \
810 #define __chv_read(x) \
812 chv_read##x(struct drm_i915_private *dev_priv, off_t reg, bool trace) { \
813 unsigned fwengine = 0; \
814 REG_READ_HEADER(x); \
815 if (FORCEWAKE_CHV_RENDER_RANGE_OFFSET(reg)) { \
816 if (dev_priv->uncore.fw_rendercount == 0) \
817 fwengine = FORCEWAKE_RENDER; \
818 } else if (FORCEWAKE_CHV_MEDIA_RANGE_OFFSET(reg)) { \
819 if (dev_priv->uncore.fw_mediacount == 0) \
820 fwengine = FORCEWAKE_MEDIA; \
821 } else if (FORCEWAKE_CHV_COMMON_RANGE_OFFSET(reg)) { \
822 if (dev_priv->uncore.fw_rendercount == 0) \
823 fwengine |= FORCEWAKE_RENDER; \
824 if (dev_priv->uncore.fw_mediacount == 0) \
825 fwengine |= FORCEWAKE_MEDIA; \
828 dev_priv->uncore.funcs.force_wake_get(dev_priv, fwengine); \
829 val = __raw_i915_read##x(dev_priv, reg); \
831 dev_priv->uncore.funcs.force_wake_put(dev_priv, fwengine); \
835 #define SKL_NEEDS_FORCE_WAKE(dev_priv, reg) \
836 ((reg) < 0x40000 && !FORCEWAKE_GEN9_UNCORE_RANGE_OFFSET(reg))
838 #define __gen9_read(x) \
840 gen9_read##x(struct drm_i915_private *dev_priv, off_t reg, bool trace) { \
841 REG_READ_HEADER(x); \
842 if (!SKL_NEEDS_FORCE_WAKE((dev_priv), (reg))) { \
843 val = __raw_i915_read##x(dev_priv, reg); \
845 unsigned fwengine = 0; \
846 if (FORCEWAKE_GEN9_RENDER_RANGE_OFFSET(reg)) { \
847 if (dev_priv->uncore.fw_rendercount == 0) \
848 fwengine = FORCEWAKE_RENDER; \
849 } else if (FORCEWAKE_GEN9_MEDIA_RANGE_OFFSET(reg)) { \
850 if (dev_priv->uncore.fw_mediacount == 0) \
851 fwengine = FORCEWAKE_MEDIA; \
852 } else if (FORCEWAKE_GEN9_COMMON_RANGE_OFFSET(reg)) { \
853 if (dev_priv->uncore.fw_rendercount == 0) \
854 fwengine |= FORCEWAKE_RENDER; \
855 if (dev_priv->uncore.fw_mediacount == 0) \
856 fwengine |= FORCEWAKE_MEDIA; \
858 if (dev_priv->uncore.fw_blittercount == 0) \
859 fwengine = FORCEWAKE_BLITTER; \
862 dev_priv->uncore.funcs.force_wake_get(dev_priv, fwengine); \
863 val = __raw_i915_read##x(dev_priv, reg); \
865 dev_priv->uncore.funcs.force_wake_put(dev_priv, fwengine); \
901 #undef REG_READ_FOOTER
902 #undef REG_READ_HEADER
904 #define REG_WRITE_HEADER \
905 unsigned long irqflags; \
906 trace_i915_reg_rw(true, reg, val, sizeof(val), trace); \
907 assert_device_not_suspended(dev_priv); \
908 spin_lock_irqsave(&dev_priv->uncore.lock, irqflags)
910 #define REG_WRITE_FOOTER \
911 spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags)
913 #define __gen4_write(x) \
915 gen4_write##x(struct drm_i915_private *dev_priv, off_t reg, u##x val, bool trace) { \
917 __raw_i915_write##x(dev_priv, reg, val); \
921 #define __gen5_write(x) \
923 gen5_write##x(struct drm_i915_private *dev_priv, off_t reg, u##x val, bool trace) { \
925 ilk_dummy_write(dev_priv); \
926 __raw_i915_write##x(dev_priv, reg, val); \
930 #define __gen6_write(x) \
932 gen6_write##x(struct drm_i915_private *dev_priv, off_t reg, u##x val, bool trace) { \
933 u32 __fifo_ret = 0; \
935 if (NEEDS_FORCE_WAKE((dev_priv), (reg))) { \
936 __fifo_ret = __gen6_gt_wait_for_fifo(dev_priv); \
938 __raw_i915_write##x(dev_priv, reg, val); \
939 if (unlikely(__fifo_ret)) { \
940 gen6_gt_check_fifodbg(dev_priv); \
945 #define __hsw_write(x) \
947 hsw_write##x(struct drm_i915_private *dev_priv, off_t reg, u##x val, bool trace) { \
948 u32 __fifo_ret = 0; \
950 if (NEEDS_FORCE_WAKE((dev_priv), (reg))) { \
951 __fifo_ret = __gen6_gt_wait_for_fifo(dev_priv); \
953 hsw_unclaimed_reg_debug(dev_priv, reg, false, true); \
954 __raw_i915_write##x(dev_priv, reg, val); \
955 if (unlikely(__fifo_ret)) { \
956 gen6_gt_check_fifodbg(dev_priv); \
958 hsw_unclaimed_reg_debug(dev_priv, reg, false, false); \
959 hsw_unclaimed_reg_detect(dev_priv); \
963 static const u32 gen8_shadowed_regs
[] = {
967 RING_TAIL(RENDER_RING_BASE
),
968 RING_TAIL(GEN6_BSD_RING_BASE
),
969 RING_TAIL(VEBOX_RING_BASE
),
970 RING_TAIL(BLT_RING_BASE
),
971 /* TODO: Other registers are not yet used */
974 static bool is_gen8_shadowed(struct drm_i915_private
*dev_priv
, u32 reg
)
977 for (i
= 0; i
< ARRAY_SIZE(gen8_shadowed_regs
); i
++)
978 if (reg
== gen8_shadowed_regs
[i
])
984 #define __gen8_write(x) \
986 gen8_write##x(struct drm_i915_private *dev_priv, off_t reg, u##x val, bool trace) { \
988 hsw_unclaimed_reg_debug(dev_priv, reg, false, true); \
989 if (reg < 0x40000 && !is_gen8_shadowed(dev_priv, reg)) { \
990 if (dev_priv->uncore.forcewake_count == 0) \
991 dev_priv->uncore.funcs.force_wake_get(dev_priv, \
993 __raw_i915_write##x(dev_priv, reg, val); \
994 if (dev_priv->uncore.forcewake_count == 0) \
995 dev_priv->uncore.funcs.force_wake_put(dev_priv, \
998 __raw_i915_write##x(dev_priv, reg, val); \
1000 hsw_unclaimed_reg_debug(dev_priv, reg, false, false); \
1001 hsw_unclaimed_reg_detect(dev_priv); \
1005 #define __chv_write(x) \
1007 chv_write##x(struct drm_i915_private *dev_priv, off_t reg, u##x val, bool trace) { \
1008 unsigned fwengine = 0; \
1009 bool shadowed = is_gen8_shadowed(dev_priv, reg); \
1012 if (FORCEWAKE_CHV_RENDER_RANGE_OFFSET(reg)) { \
1013 if (dev_priv->uncore.fw_rendercount == 0) \
1014 fwengine = FORCEWAKE_RENDER; \
1015 } else if (FORCEWAKE_CHV_MEDIA_RANGE_OFFSET(reg)) { \
1016 if (dev_priv->uncore.fw_mediacount == 0) \
1017 fwengine = FORCEWAKE_MEDIA; \
1018 } else if (FORCEWAKE_CHV_COMMON_RANGE_OFFSET(reg)) { \
1019 if (dev_priv->uncore.fw_rendercount == 0) \
1020 fwengine |= FORCEWAKE_RENDER; \
1021 if (dev_priv->uncore.fw_mediacount == 0) \
1022 fwengine |= FORCEWAKE_MEDIA; \
1026 dev_priv->uncore.funcs.force_wake_get(dev_priv, fwengine); \
1027 __raw_i915_write##x(dev_priv, reg, val); \
1029 dev_priv->uncore.funcs.force_wake_put(dev_priv, fwengine); \
1033 static const u32 gen9_shadowed_regs
[] = {
1034 RING_TAIL(RENDER_RING_BASE
),
1035 RING_TAIL(GEN6_BSD_RING_BASE
),
1036 RING_TAIL(VEBOX_RING_BASE
),
1037 RING_TAIL(BLT_RING_BASE
),
1038 FORCEWAKE_BLITTER_GEN9
,
1039 FORCEWAKE_RENDER_GEN9
,
1040 FORCEWAKE_MEDIA_GEN9
,
1043 /* TODO: Other registers are not yet used */
1046 static bool is_gen9_shadowed(struct drm_i915_private
*dev_priv
, u32 reg
)
1049 for (i
= 0; i
< ARRAY_SIZE(gen9_shadowed_regs
); i
++)
1050 if (reg
== gen9_shadowed_regs
[i
])
1056 #define __gen9_write(x) \
1058 gen9_write##x(struct drm_i915_private *dev_priv, off_t reg, u##x val, \
1061 if (!SKL_NEEDS_FORCE_WAKE((dev_priv), (reg)) || \
1062 is_gen9_shadowed(dev_priv, reg)) { \
1063 __raw_i915_write##x(dev_priv, reg, val); \
1065 unsigned fwengine = 0; \
1066 if (FORCEWAKE_GEN9_RENDER_RANGE_OFFSET(reg)) { \
1067 if (dev_priv->uncore.fw_rendercount == 0) \
1068 fwengine = FORCEWAKE_RENDER; \
1069 } else if (FORCEWAKE_GEN9_MEDIA_RANGE_OFFSET(reg)) { \
1070 if (dev_priv->uncore.fw_mediacount == 0) \
1071 fwengine = FORCEWAKE_MEDIA; \
1072 } else if (FORCEWAKE_GEN9_COMMON_RANGE_OFFSET(reg)) { \
1073 if (dev_priv->uncore.fw_rendercount == 0) \
1074 fwengine |= FORCEWAKE_RENDER; \
1075 if (dev_priv->uncore.fw_mediacount == 0) \
1076 fwengine |= FORCEWAKE_MEDIA; \
1078 if (dev_priv->uncore.fw_blittercount == 0) \
1079 fwengine = FORCEWAKE_BLITTER; \
1082 dev_priv->uncore.funcs.force_wake_get(dev_priv, \
1084 __raw_i915_write##x(dev_priv, reg, val); \
1086 dev_priv->uncore.funcs.force_wake_put(dev_priv, \
1128 #undef REG_WRITE_FOOTER
1129 #undef REG_WRITE_HEADER
1131 #define ASSIGN_WRITE_MMIO_VFUNCS(x) \
1133 dev_priv->uncore.funcs.mmio_writeb = x##_write8; \
1134 dev_priv->uncore.funcs.mmio_writew = x##_write16; \
1135 dev_priv->uncore.funcs.mmio_writel = x##_write32; \
1136 dev_priv->uncore.funcs.mmio_writeq = x##_write64; \
1139 #define ASSIGN_READ_MMIO_VFUNCS(x) \
1141 dev_priv->uncore.funcs.mmio_readb = x##_read8; \
1142 dev_priv->uncore.funcs.mmio_readw = x##_read16; \
1143 dev_priv->uncore.funcs.mmio_readl = x##_read32; \
1144 dev_priv->uncore.funcs.mmio_readq = x##_read64; \
1147 void intel_uncore_init(struct drm_device
*dev
)
1149 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1151 setup_timer(&dev_priv
->uncore
.force_wake_timer
,
1152 gen6_force_wake_timer
, (unsigned long)dev_priv
);
1154 __intel_uncore_early_sanitize(dev
, false);
1157 dev_priv
->uncore
.funcs
.force_wake_get
= __gen9_force_wake_get
;
1158 dev_priv
->uncore
.funcs
.force_wake_put
= __gen9_force_wake_put
;
1159 } else if (IS_VALLEYVIEW(dev
)) {
1160 dev_priv
->uncore
.funcs
.force_wake_get
= __vlv_force_wake_get
;
1161 dev_priv
->uncore
.funcs
.force_wake_put
= __vlv_force_wake_put
;
1162 } else if (IS_HASWELL(dev
) || IS_BROADWELL(dev
)) {
1163 dev_priv
->uncore
.funcs
.force_wake_get
= __gen7_gt_force_wake_mt_get
;
1164 dev_priv
->uncore
.funcs
.force_wake_put
= __gen7_gt_force_wake_mt_put
;
1165 } else if (IS_IVYBRIDGE(dev
)) {
1168 /* IVB configs may use multi-threaded forcewake */
1170 /* A small trick here - if the bios hasn't configured
1171 * MT forcewake, and if the device is in RC6, then
1172 * force_wake_mt_get will not wake the device and the
1173 * ECOBUS read will return zero. Which will be
1174 * (correctly) interpreted by the test below as MT
1175 * forcewake being disabled.
1177 mutex_lock(&dev
->struct_mutex
);
1178 __gen7_gt_force_wake_mt_get(dev_priv
, FORCEWAKE_ALL
);
1179 ecobus
= __raw_i915_read32(dev_priv
, ECOBUS
);
1180 __gen7_gt_force_wake_mt_put(dev_priv
, FORCEWAKE_ALL
);
1181 mutex_unlock(&dev
->struct_mutex
);
1183 if (ecobus
& FORCEWAKE_MT_ENABLE
) {
1184 dev_priv
->uncore
.funcs
.force_wake_get
=
1185 __gen7_gt_force_wake_mt_get
;
1186 dev_priv
->uncore
.funcs
.force_wake_put
=
1187 __gen7_gt_force_wake_mt_put
;
1189 DRM_INFO("No MT forcewake available on Ivybridge, this can result in issues\n");
1190 DRM_INFO("when using vblank-synced partial screen updates.\n");
1191 dev_priv
->uncore
.funcs
.force_wake_get
=
1192 __gen6_gt_force_wake_get
;
1193 dev_priv
->uncore
.funcs
.force_wake_put
=
1194 __gen6_gt_force_wake_put
;
1196 } else if (IS_GEN6(dev
)) {
1197 dev_priv
->uncore
.funcs
.force_wake_get
=
1198 __gen6_gt_force_wake_get
;
1199 dev_priv
->uncore
.funcs
.force_wake_put
=
1200 __gen6_gt_force_wake_put
;
1203 switch (INTEL_INFO(dev
)->gen
) {
1208 ASSIGN_WRITE_MMIO_VFUNCS(gen9
);
1209 ASSIGN_READ_MMIO_VFUNCS(gen9
);
1212 if (IS_CHERRYVIEW(dev
)) {
1213 ASSIGN_WRITE_MMIO_VFUNCS(chv
);
1214 ASSIGN_READ_MMIO_VFUNCS(chv
);
1217 ASSIGN_WRITE_MMIO_VFUNCS(gen8
);
1218 ASSIGN_READ_MMIO_VFUNCS(gen6
);
1223 if (IS_HASWELL(dev
)) {
1224 ASSIGN_WRITE_MMIO_VFUNCS(hsw
);
1226 ASSIGN_WRITE_MMIO_VFUNCS(gen6
);
1229 if (IS_VALLEYVIEW(dev
)) {
1230 ASSIGN_READ_MMIO_VFUNCS(vlv
);
1232 ASSIGN_READ_MMIO_VFUNCS(gen6
);
1236 ASSIGN_WRITE_MMIO_VFUNCS(gen5
);
1237 ASSIGN_READ_MMIO_VFUNCS(gen5
);
1242 ASSIGN_WRITE_MMIO_VFUNCS(gen4
);
1243 ASSIGN_READ_MMIO_VFUNCS(gen4
);
1247 i915_check_and_clear_faults(dev
);
1249 #undef ASSIGN_WRITE_MMIO_VFUNCS
1250 #undef ASSIGN_READ_MMIO_VFUNCS
1252 void intel_uncore_fini(struct drm_device
*dev
)
1254 /* Paranoia: make sure we have disabled everything before we exit. */
1255 intel_uncore_sanitize(dev
);
1256 intel_uncore_forcewake_reset(dev
, false);
1259 #define GEN_RANGE(l, h) GENMASK(h, l)
1261 static const struct register_whitelist
{
1264 /* supported gens, 0x10 for 4, 0x30 for 4 and 5, etc. */
1265 uint32_t gen_bitmask
;
1267 { RING_TIMESTAMP(RENDER_RING_BASE
), 8, GEN_RANGE(4, 9) },
1270 int i915_reg_read_ioctl(struct drm_device
*dev
,
1271 void *data
, struct drm_file
*file
)
1273 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1274 struct drm_i915_reg_read
*reg
= data
;
1275 struct register_whitelist
const *entry
= whitelist
;
1278 for (i
= 0; i
< ARRAY_SIZE(whitelist
); i
++, entry
++) {
1279 if (entry
->offset
== reg
->offset
&&
1280 (1 << INTEL_INFO(dev
)->gen
& entry
->gen_bitmask
))
1284 if (i
== ARRAY_SIZE(whitelist
))
1287 intel_runtime_pm_get(dev_priv
);
1289 switch (entry
->size
) {
1291 reg
->val
= I915_READ64(reg
->offset
);
1294 reg
->val
= I915_READ(reg
->offset
);
1297 reg
->val
= I915_READ16(reg
->offset
);
1300 reg
->val
= I915_READ8(reg
->offset
);
1309 intel_runtime_pm_put(dev_priv
);
1313 int i915_get_reset_stats_ioctl(struct drm_device
*dev
,
1314 void *data
, struct drm_file
*file
)
1316 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1317 struct drm_i915_reset_stats
*args
= data
;
1318 struct i915_ctx_hang_stats
*hs
;
1319 struct intel_context
*ctx
;
1322 if (args
->flags
|| args
->pad
)
1325 if (args
->ctx_id
== DEFAULT_CONTEXT_HANDLE
&& !capable(CAP_SYS_ADMIN
))
1328 ret
= mutex_lock_interruptible(&dev
->struct_mutex
);
1332 ctx
= i915_gem_context_get(file
->driver_priv
, args
->ctx_id
);
1334 mutex_unlock(&dev
->struct_mutex
);
1335 return PTR_ERR(ctx
);
1337 hs
= &ctx
->hang_stats
;
1339 if (capable(CAP_SYS_ADMIN
))
1340 args
->reset_count
= i915_reset_count(&dev_priv
->gpu_error
);
1342 args
->reset_count
= 0;
1344 args
->batch_active
= hs
->batch_active
;
1345 args
->batch_pending
= hs
->batch_pending
;
1347 mutex_unlock(&dev
->struct_mutex
);
1352 static int i915_reset_complete(struct drm_device
*dev
)
1355 pci_read_config_byte(dev
->pdev
, I915_GDRST
, &gdrst
);
1356 return (gdrst
& GRDOM_RESET_STATUS
) == 0;
1359 static int i915_do_reset(struct drm_device
*dev
)
1361 /* assert reset for at least 20 usec */
1362 pci_write_config_byte(dev
->pdev
, I915_GDRST
, GRDOM_RESET_ENABLE
);
1364 pci_write_config_byte(dev
->pdev
, I915_GDRST
, 0);
1366 return wait_for(i915_reset_complete(dev
), 500);
1369 static int g4x_reset_complete(struct drm_device
*dev
)
1372 pci_read_config_byte(dev
->pdev
, I915_GDRST
, &gdrst
);
1373 return (gdrst
& GRDOM_RESET_ENABLE
) == 0;
1376 static int g33_do_reset(struct drm_device
*dev
)
1378 pci_write_config_byte(dev
->pdev
, I915_GDRST
, GRDOM_RESET_ENABLE
);
1379 return wait_for(g4x_reset_complete(dev
), 500);
1382 static int g4x_do_reset(struct drm_device
*dev
)
1384 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1387 pci_write_config_byte(dev
->pdev
, I915_GDRST
,
1388 GRDOM_RENDER
| GRDOM_RESET_ENABLE
);
1389 ret
= wait_for(g4x_reset_complete(dev
), 500);
1393 /* WaVcpClkGateDisableForMediaReset:ctg,elk */
1394 I915_WRITE(VDECCLK_GATE_D
, I915_READ(VDECCLK_GATE_D
) | VCP_UNIT_CLOCK_GATE_DISABLE
);
1395 POSTING_READ(VDECCLK_GATE_D
);
1397 pci_write_config_byte(dev
->pdev
, I915_GDRST
,
1398 GRDOM_MEDIA
| GRDOM_RESET_ENABLE
);
1399 ret
= wait_for(g4x_reset_complete(dev
), 500);
1403 /* WaVcpClkGateDisableForMediaReset:ctg,elk */
1404 I915_WRITE(VDECCLK_GATE_D
, I915_READ(VDECCLK_GATE_D
) & ~VCP_UNIT_CLOCK_GATE_DISABLE
);
1405 POSTING_READ(VDECCLK_GATE_D
);
1407 pci_write_config_byte(dev
->pdev
, I915_GDRST
, 0);
1412 static int ironlake_do_reset(struct drm_device
*dev
)
1414 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1417 I915_WRITE(MCHBAR_MIRROR_BASE
+ ILK_GDSR
,
1418 ILK_GRDOM_RENDER
| ILK_GRDOM_RESET_ENABLE
);
1419 ret
= wait_for((I915_READ(MCHBAR_MIRROR_BASE
+ ILK_GDSR
) &
1420 ILK_GRDOM_RESET_ENABLE
) == 0, 500);
1424 I915_WRITE(MCHBAR_MIRROR_BASE
+ ILK_GDSR
,
1425 ILK_GRDOM_MEDIA
| ILK_GRDOM_RESET_ENABLE
);
1426 ret
= wait_for((I915_READ(MCHBAR_MIRROR_BASE
+ ILK_GDSR
) &
1427 ILK_GRDOM_RESET_ENABLE
) == 0, 500);
1431 I915_WRITE(MCHBAR_MIRROR_BASE
+ ILK_GDSR
, 0);
1436 static int gen6_do_reset(struct drm_device
*dev
)
1438 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1441 /* Reset the chip */
1443 /* GEN6_GDRST is not in the gt power well, no need to check
1444 * for fifo space for the write or forcewake the chip for
1447 __raw_i915_write32(dev_priv
, GEN6_GDRST
, GEN6_GRDOM_FULL
);
1449 /* Spin waiting for the device to ack the reset request */
1450 ret
= wait_for((__raw_i915_read32(dev_priv
, GEN6_GDRST
) & GEN6_GRDOM_FULL
) == 0, 500);
1452 intel_uncore_forcewake_reset(dev
, true);
1457 int intel_gpu_reset(struct drm_device
*dev
)
1459 if (INTEL_INFO(dev
)->gen
>= 6)
1460 return gen6_do_reset(dev
);
1461 else if (IS_GEN5(dev
))
1462 return ironlake_do_reset(dev
);
1463 else if (IS_G4X(dev
))
1464 return g4x_do_reset(dev
);
1465 else if (IS_G33(dev
))
1466 return g33_do_reset(dev
);
1467 else if (INTEL_INFO(dev
)->gen
>= 3)
1468 return i915_do_reset(dev
);
1473 void intel_uncore_check_errors(struct drm_device
*dev
)
1475 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1477 if (HAS_FPGA_DBG_UNCLAIMED(dev
) &&
1478 (__raw_i915_read32(dev_priv
, FPGA_DBG
) & FPGA_DBG_RM_NOCLAIM
)) {
1479 DRM_ERROR("Unclaimed register before interrupt\n");
1480 __raw_i915_write32(dev_priv
, FPGA_DBG
, FPGA_DBG_RM_NOCLAIM
);