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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 <linux/pm_runtime.h>
25#include <asm/iosf_mbi.h>
26
27#include "i915_drv.h"
28#include "i915_trace.h"
29#include "i915_vgpu.h"
30#include "intel_pm.h"
31
32#define FORCEWAKE_ACK_TIMEOUT_MS 50
33#define GT_FIFO_TIMEOUT_MS 10
34
35#define __raw_posting_read(...) ((void)__raw_uncore_read32(__VA_ARGS__))
36
37void
38intel_uncore_mmio_debug_init_early(struct intel_uncore_mmio_debug *mmio_debug)
39{
40 spin_lock_init(&mmio_debug->lock);
41 mmio_debug->unclaimed_mmio_check = 1;
42}
43
44static void mmio_debug_suspend(struct intel_uncore_mmio_debug *mmio_debug)
45{
46 lockdep_assert_held(&mmio_debug->lock);
47
48 /* Save and disable mmio debugging for the user bypass */
49 if (!mmio_debug->suspend_count++) {
50 mmio_debug->saved_mmio_check = mmio_debug->unclaimed_mmio_check;
51 mmio_debug->unclaimed_mmio_check = 0;
52 }
53}
54
55static void mmio_debug_resume(struct intel_uncore_mmio_debug *mmio_debug)
56{
57 lockdep_assert_held(&mmio_debug->lock);
58
59 if (!--mmio_debug->suspend_count)
60 mmio_debug->unclaimed_mmio_check = mmio_debug->saved_mmio_check;
61}
62
63static const char * const forcewake_domain_names[] = {
64 "render",
65 "blitter",
66 "media",
67 "vdbox0",
68 "vdbox1",
69 "vdbox2",
70 "vdbox3",
71 "vebox0",
72 "vebox1",
73};
74
75const char *
76intel_uncore_forcewake_domain_to_str(const enum forcewake_domain_id id)
77{
78 BUILD_BUG_ON(ARRAY_SIZE(forcewake_domain_names) != FW_DOMAIN_ID_COUNT);
79
80 if (id >= 0 && id < FW_DOMAIN_ID_COUNT)
81 return forcewake_domain_names[id];
82
83 WARN_ON(id);
84
85 return "unknown";
86}
87
88#define fw_ack(d) readl((d)->reg_ack)
89#define fw_set(d, val) writel(_MASKED_BIT_ENABLE((val)), (d)->reg_set)
90#define fw_clear(d, val) writel(_MASKED_BIT_DISABLE((val)), (d)->reg_set)
91
92static inline void
93fw_domain_reset(const struct intel_uncore_forcewake_domain *d)
94{
95 /*
96 * We don't really know if the powerwell for the forcewake domain we are
97 * trying to reset here does exist at this point (engines could be fused
98 * off in ICL+), so no waiting for acks
99 */
100 /* WaRsClearFWBitsAtReset:bdw,skl */
101 fw_clear(d, 0xffff);
102}
103
104static inline void
105fw_domain_arm_timer(struct intel_uncore_forcewake_domain *d)
106{
107 GEM_BUG_ON(d->uncore->fw_domains_timer & d->mask);
108 d->uncore->fw_domains_timer |= d->mask;
109 d->wake_count++;
110 hrtimer_start_range_ns(&d->timer,
111 NSEC_PER_MSEC,
112 NSEC_PER_MSEC,
113 HRTIMER_MODE_REL);
114}
115
116static inline int
117__wait_for_ack(const struct intel_uncore_forcewake_domain *d,
118 const u32 ack,
119 const u32 value)
120{
121 return wait_for_atomic((fw_ack(d) & ack) == value,
122 FORCEWAKE_ACK_TIMEOUT_MS);
123}
124
125static inline int
126wait_ack_clear(const struct intel_uncore_forcewake_domain *d,
127 const u32 ack)
128{
129 return __wait_for_ack(d, ack, 0);
130}
131
132static inline int
133wait_ack_set(const struct intel_uncore_forcewake_domain *d,
134 const u32 ack)
135{
136 return __wait_for_ack(d, ack, ack);
137}
138
139static inline void
140fw_domain_wait_ack_clear(const struct intel_uncore_forcewake_domain *d)
141{
142 if (wait_ack_clear(d, FORCEWAKE_KERNEL)) {
143 DRM_ERROR("%s: timed out waiting for forcewake ack to clear.\n",
144 intel_uncore_forcewake_domain_to_str(d->id));
145 add_taint_for_CI(d->uncore->i915, TAINT_WARN); /* CI now unreliable */
146 }
147}
148
149enum ack_type {
150 ACK_CLEAR = 0,
151 ACK_SET
152};
153
154static int
155fw_domain_wait_ack_with_fallback(const struct intel_uncore_forcewake_domain *d,
156 const enum ack_type type)
157{
158 const u32 ack_bit = FORCEWAKE_KERNEL;
159 const u32 value = type == ACK_SET ? ack_bit : 0;
160 unsigned int pass;
161 bool ack_detected;
162
163 /*
164 * There is a possibility of driver's wake request colliding
165 * with hardware's own wake requests and that can cause
166 * hardware to not deliver the driver's ack message.
167 *
168 * Use a fallback bit toggle to kick the gpu state machine
169 * in the hope that the original ack will be delivered along with
170 * the fallback ack.
171 *
172 * This workaround is described in HSDES #1604254524 and it's known as:
173 * WaRsForcewakeAddDelayForAck:skl,bxt,kbl,glk,cfl,cnl,icl
174 * although the name is a bit misleading.
175 */
176
177 pass = 1;
178 do {
179 wait_ack_clear(d, FORCEWAKE_KERNEL_FALLBACK);
180
181 fw_set(d, FORCEWAKE_KERNEL_FALLBACK);
182 /* Give gt some time to relax before the polling frenzy */
183 udelay(10 * pass);
184 wait_ack_set(d, FORCEWAKE_KERNEL_FALLBACK);
185
186 ack_detected = (fw_ack(d) & ack_bit) == value;
187
188 fw_clear(d, FORCEWAKE_KERNEL_FALLBACK);
189 } while (!ack_detected && pass++ < 10);
190
191 DRM_DEBUG_DRIVER("%s had to use fallback to %s ack, 0x%x (passes %u)\n",
192 intel_uncore_forcewake_domain_to_str(d->id),
193 type == ACK_SET ? "set" : "clear",
194 fw_ack(d),
195 pass);
196
197 return ack_detected ? 0 : -ETIMEDOUT;
198}
199
200static inline void
201fw_domain_wait_ack_clear_fallback(const struct intel_uncore_forcewake_domain *d)
202{
203 if (likely(!wait_ack_clear(d, FORCEWAKE_KERNEL)))
204 return;
205
206 if (fw_domain_wait_ack_with_fallback(d, ACK_CLEAR))
207 fw_domain_wait_ack_clear(d);
208}
209
210static inline void
211fw_domain_get(const struct intel_uncore_forcewake_domain *d)
212{
213 fw_set(d, FORCEWAKE_KERNEL);
214}
215
216static inline void
217fw_domain_wait_ack_set(const struct intel_uncore_forcewake_domain *d)
218{
219 if (wait_ack_set(d, FORCEWAKE_KERNEL)) {
220 DRM_ERROR("%s: timed out waiting for forcewake ack request.\n",
221 intel_uncore_forcewake_domain_to_str(d->id));
222 add_taint_for_CI(d->uncore->i915, TAINT_WARN); /* CI now unreliable */
223 }
224}
225
226static inline void
227fw_domain_wait_ack_set_fallback(const struct intel_uncore_forcewake_domain *d)
228{
229 if (likely(!wait_ack_set(d, FORCEWAKE_KERNEL)))
230 return;
231
232 if (fw_domain_wait_ack_with_fallback(d, ACK_SET))
233 fw_domain_wait_ack_set(d);
234}
235
236static inline void
237fw_domain_put(const struct intel_uncore_forcewake_domain *d)
238{
239 fw_clear(d, FORCEWAKE_KERNEL);
240}
241
242static void
243fw_domains_get(struct intel_uncore *uncore, enum forcewake_domains fw_domains)
244{
245 struct intel_uncore_forcewake_domain *d;
246 unsigned int tmp;
247
248 GEM_BUG_ON(fw_domains & ~uncore->fw_domains);
249
250 for_each_fw_domain_masked(d, fw_domains, uncore, tmp) {
251 fw_domain_wait_ack_clear(d);
252 fw_domain_get(d);
253 }
254
255 for_each_fw_domain_masked(d, fw_domains, uncore, tmp)
256 fw_domain_wait_ack_set(d);
257
258 uncore->fw_domains_active |= fw_domains;
259}
260
261static void
262fw_domains_get_with_fallback(struct intel_uncore *uncore,
263 enum forcewake_domains fw_domains)
264{
265 struct intel_uncore_forcewake_domain *d;
266 unsigned int tmp;
267
268 GEM_BUG_ON(fw_domains & ~uncore->fw_domains);
269
270 for_each_fw_domain_masked(d, fw_domains, uncore, tmp) {
271 fw_domain_wait_ack_clear_fallback(d);
272 fw_domain_get(d);
273 }
274
275 for_each_fw_domain_masked(d, fw_domains, uncore, tmp)
276 fw_domain_wait_ack_set_fallback(d);
277
278 uncore->fw_domains_active |= fw_domains;
279}
280
281static void
282fw_domains_put(struct intel_uncore *uncore, enum forcewake_domains fw_domains)
283{
284 struct intel_uncore_forcewake_domain *d;
285 unsigned int tmp;
286
287 GEM_BUG_ON(fw_domains & ~uncore->fw_domains);
288
289 for_each_fw_domain_masked(d, fw_domains, uncore, tmp)
290 fw_domain_put(d);
291
292 uncore->fw_domains_active &= ~fw_domains;
293}
294
295static void
296fw_domains_reset(struct intel_uncore *uncore,
297 enum forcewake_domains fw_domains)
298{
299 struct intel_uncore_forcewake_domain *d;
300 unsigned int tmp;
301
302 if (!fw_domains)
303 return;
304
305 GEM_BUG_ON(fw_domains & ~uncore->fw_domains);
306
307 for_each_fw_domain_masked(d, fw_domains, uncore, tmp)
308 fw_domain_reset(d);
309}
310
311static inline u32 gt_thread_status(struct intel_uncore *uncore)
312{
313 u32 val;
314
315 val = __raw_uncore_read32(uncore, GEN6_GT_THREAD_STATUS_REG);
316 val &= GEN6_GT_THREAD_STATUS_CORE_MASK;
317
318 return val;
319}
320
321static void __gen6_gt_wait_for_thread_c0(struct intel_uncore *uncore)
322{
323 /*
324 * w/a for a sporadic read returning 0 by waiting for the GT
325 * thread to wake up.
326 */
327 drm_WARN_ONCE(&uncore->i915->drm,
328 wait_for_atomic_us(gt_thread_status(uncore) == 0, 5000),
329 "GT thread status wait timed out\n");
330}
331
332static void fw_domains_get_with_thread_status(struct intel_uncore *uncore,
333 enum forcewake_domains fw_domains)
334{
335 fw_domains_get(uncore, fw_domains);
336
337 /* WaRsForcewakeWaitTC0:snb,ivb,hsw,bdw,vlv */
338 __gen6_gt_wait_for_thread_c0(uncore);
339}
340
341static inline u32 fifo_free_entries(struct intel_uncore *uncore)
342{
343 u32 count = __raw_uncore_read32(uncore, GTFIFOCTL);
344
345 return count & GT_FIFO_FREE_ENTRIES_MASK;
346}
347
348static void __gen6_gt_wait_for_fifo(struct intel_uncore *uncore)
349{
350 u32 n;
351
352 /* On VLV, FIFO will be shared by both SW and HW.
353 * So, we need to read the FREE_ENTRIES everytime */
354 if (IS_VALLEYVIEW(uncore->i915))
355 n = fifo_free_entries(uncore);
356 else
357 n = uncore->fifo_count;
358
359 if (n <= GT_FIFO_NUM_RESERVED_ENTRIES) {
360 if (wait_for_atomic((n = fifo_free_entries(uncore)) >
361 GT_FIFO_NUM_RESERVED_ENTRIES,
362 GT_FIFO_TIMEOUT_MS)) {
363 drm_dbg(&uncore->i915->drm,
364 "GT_FIFO timeout, entries: %u\n", n);
365 return;
366 }
367 }
368
369 uncore->fifo_count = n - 1;
370}
371
372static enum hrtimer_restart
373intel_uncore_fw_release_timer(struct hrtimer *timer)
374{
375 struct intel_uncore_forcewake_domain *domain =
376 container_of(timer, struct intel_uncore_forcewake_domain, timer);
377 struct intel_uncore *uncore = domain->uncore;
378 unsigned long irqflags;
379
380 assert_rpm_device_not_suspended(uncore->rpm);
381
382 if (xchg(&domain->active, false))
383 return HRTIMER_RESTART;
384
385 spin_lock_irqsave(&uncore->lock, irqflags);
386
387 uncore->fw_domains_timer &= ~domain->mask;
388
389 GEM_BUG_ON(!domain->wake_count);
390 if (--domain->wake_count == 0)
391 uncore->funcs.force_wake_put(uncore, domain->mask);
392
393 spin_unlock_irqrestore(&uncore->lock, irqflags);
394
395 return HRTIMER_NORESTART;
396}
397
398/* Note callers must have acquired the PUNIT->PMIC bus, before calling this. */
399static unsigned int
400intel_uncore_forcewake_reset(struct intel_uncore *uncore)
401{
402 unsigned long irqflags;
403 struct intel_uncore_forcewake_domain *domain;
404 int retry_count = 100;
405 enum forcewake_domains fw, active_domains;
406
407 iosf_mbi_assert_punit_acquired();
408
409 /* Hold uncore.lock across reset to prevent any register access
410 * with forcewake not set correctly. Wait until all pending
411 * timers are run before holding.
412 */
413 while (1) {
414 unsigned int tmp;
415
416 active_domains = 0;
417
418 for_each_fw_domain(domain, uncore, tmp) {
419 smp_store_mb(domain->active, false);
420 if (hrtimer_cancel(&domain->timer) == 0)
421 continue;
422
423 intel_uncore_fw_release_timer(&domain->timer);
424 }
425
426 spin_lock_irqsave(&uncore->lock, irqflags);
427
428 for_each_fw_domain(domain, uncore, tmp) {
429 if (hrtimer_active(&domain->timer))
430 active_domains |= domain->mask;
431 }
432
433 if (active_domains == 0)
434 break;
435
436 if (--retry_count == 0) {
437 drm_err(&uncore->i915->drm, "Timed out waiting for forcewake timers to finish\n");
438 break;
439 }
440
441 spin_unlock_irqrestore(&uncore->lock, irqflags);
442 cond_resched();
443 }
444
445 drm_WARN_ON(&uncore->i915->drm, active_domains);
446
447 fw = uncore->fw_domains_active;
448 if (fw)
449 uncore->funcs.force_wake_put(uncore, fw);
450
451 fw_domains_reset(uncore, uncore->fw_domains);
452 assert_forcewakes_inactive(uncore);
453
454 spin_unlock_irqrestore(&uncore->lock, irqflags);
455
456 return fw; /* track the lost user forcewake domains */
457}
458
459static bool
460fpga_check_for_unclaimed_mmio(struct intel_uncore *uncore)
461{
462 u32 dbg;
463
464 dbg = __raw_uncore_read32(uncore, FPGA_DBG);
465 if (likely(!(dbg & FPGA_DBG_RM_NOCLAIM)))
466 return false;
467
468 /*
469 * Bugs in PCI programming (or failing hardware) can occasionally cause
470 * us to lose access to the MMIO BAR. When this happens, register
471 * reads will come back with 0xFFFFFFFF for every register and things
472 * go bad very quickly. Let's try to detect that special case and at
473 * least try to print a more informative message about what has
474 * happened.
475 *
476 * During normal operation the FPGA_DBG register has several unused
477 * bits that will always read back as 0's so we can use them as canaries
478 * to recognize when MMIO accesses are just busted.
479 */
480 if (unlikely(dbg == ~0))
481 drm_err(&uncore->i915->drm,
482 "Lost access to MMIO BAR; all registers now read back as 0xFFFFFFFF!\n");
483
484 __raw_uncore_write32(uncore, FPGA_DBG, FPGA_DBG_RM_NOCLAIM);
485
486 return true;
487}
488
489static bool
490vlv_check_for_unclaimed_mmio(struct intel_uncore *uncore)
491{
492 u32 cer;
493
494 cer = __raw_uncore_read32(uncore, CLAIM_ER);
495 if (likely(!(cer & (CLAIM_ER_OVERFLOW | CLAIM_ER_CTR_MASK))))
496 return false;
497
498 __raw_uncore_write32(uncore, CLAIM_ER, CLAIM_ER_CLR);
499
500 return true;
501}
502
503static bool
504gen6_check_for_fifo_debug(struct intel_uncore *uncore)
505{
506 u32 fifodbg;
507
508 fifodbg = __raw_uncore_read32(uncore, GTFIFODBG);
509
510 if (unlikely(fifodbg)) {
511 drm_dbg(&uncore->i915->drm, "GTFIFODBG = 0x08%x\n", fifodbg);
512 __raw_uncore_write32(uncore, GTFIFODBG, fifodbg);
513 }
514
515 return fifodbg;
516}
517
518static bool
519check_for_unclaimed_mmio(struct intel_uncore *uncore)
520{
521 bool ret = false;
522
523 lockdep_assert_held(&uncore->debug->lock);
524
525 if (uncore->debug->suspend_count)
526 return false;
527
528 if (intel_uncore_has_fpga_dbg_unclaimed(uncore))
529 ret |= fpga_check_for_unclaimed_mmio(uncore);
530
531 if (intel_uncore_has_dbg_unclaimed(uncore))
532 ret |= vlv_check_for_unclaimed_mmio(uncore);
533
534 if (intel_uncore_has_fifo(uncore))
535 ret |= gen6_check_for_fifo_debug(uncore);
536
537 return ret;
538}
539
540static void forcewake_early_sanitize(struct intel_uncore *uncore,
541 unsigned int restore_forcewake)
542{
543 GEM_BUG_ON(!intel_uncore_has_forcewake(uncore));
544
545 /* WaDisableShadowRegForCpd:chv */
546 if (IS_CHERRYVIEW(uncore->i915)) {
547 __raw_uncore_write32(uncore, GTFIFOCTL,
548 __raw_uncore_read32(uncore, GTFIFOCTL) |
549 GT_FIFO_CTL_BLOCK_ALL_POLICY_STALL |
550 GT_FIFO_CTL_RC6_POLICY_STALL);
551 }
552
553 iosf_mbi_punit_acquire();
554 intel_uncore_forcewake_reset(uncore);
555 if (restore_forcewake) {
556 spin_lock_irq(&uncore->lock);
557 uncore->funcs.force_wake_get(uncore, restore_forcewake);
558
559 if (intel_uncore_has_fifo(uncore))
560 uncore->fifo_count = fifo_free_entries(uncore);
561 spin_unlock_irq(&uncore->lock);
562 }
563 iosf_mbi_punit_release();
564}
565
566void intel_uncore_suspend(struct intel_uncore *uncore)
567{
568 if (!intel_uncore_has_forcewake(uncore))
569 return;
570
571 iosf_mbi_punit_acquire();
572 iosf_mbi_unregister_pmic_bus_access_notifier_unlocked(
573 &uncore->pmic_bus_access_nb);
574 uncore->fw_domains_saved = intel_uncore_forcewake_reset(uncore);
575 iosf_mbi_punit_release();
576}
577
578void intel_uncore_resume_early(struct intel_uncore *uncore)
579{
580 unsigned int restore_forcewake;
581
582 if (intel_uncore_unclaimed_mmio(uncore))
583 drm_dbg(&uncore->i915->drm, "unclaimed mmio detected on resume, clearing\n");
584
585 if (!intel_uncore_has_forcewake(uncore))
586 return;
587
588 restore_forcewake = fetch_and_zero(&uncore->fw_domains_saved);
589 forcewake_early_sanitize(uncore, restore_forcewake);
590
591 iosf_mbi_register_pmic_bus_access_notifier(&uncore->pmic_bus_access_nb);
592}
593
594void intel_uncore_runtime_resume(struct intel_uncore *uncore)
595{
596 if (!intel_uncore_has_forcewake(uncore))
597 return;
598
599 iosf_mbi_register_pmic_bus_access_notifier(&uncore->pmic_bus_access_nb);
600}
601
602static void __intel_uncore_forcewake_get(struct intel_uncore *uncore,
603 enum forcewake_domains fw_domains)
604{
605 struct intel_uncore_forcewake_domain *domain;
606 unsigned int tmp;
607
608 fw_domains &= uncore->fw_domains;
609
610 for_each_fw_domain_masked(domain, fw_domains, uncore, tmp) {
611 if (domain->wake_count++) {
612 fw_domains &= ~domain->mask;
613 domain->active = true;
614 }
615 }
616
617 if (fw_domains)
618 uncore->funcs.force_wake_get(uncore, fw_domains);
619}
620
621/**
622 * intel_uncore_forcewake_get - grab forcewake domain references
623 * @uncore: the intel_uncore structure
624 * @fw_domains: forcewake domains to get reference on
625 *
626 * This function can be used get GT's forcewake domain references.
627 * Normal register access will handle the forcewake domains automatically.
628 * However if some sequence requires the GT to not power down a particular
629 * forcewake domains this function should be called at the beginning of the
630 * sequence. And subsequently the reference should be dropped by symmetric
631 * call to intel_unforce_forcewake_put(). Usually caller wants all the domains
632 * to be kept awake so the @fw_domains would be then FORCEWAKE_ALL.
633 */
634void intel_uncore_forcewake_get(struct intel_uncore *uncore,
635 enum forcewake_domains fw_domains)
636{
637 unsigned long irqflags;
638
639 if (!uncore->funcs.force_wake_get)
640 return;
641
642 assert_rpm_wakelock_held(uncore->rpm);
643
644 spin_lock_irqsave(&uncore->lock, irqflags);
645 __intel_uncore_forcewake_get(uncore, fw_domains);
646 spin_unlock_irqrestore(&uncore->lock, irqflags);
647}
648
649/**
650 * intel_uncore_forcewake_user_get - claim forcewake on behalf of userspace
651 * @uncore: the intel_uncore structure
652 *
653 * This function is a wrapper around intel_uncore_forcewake_get() to acquire
654 * the GT powerwell and in the process disable our debugging for the
655 * duration of userspace's bypass.
656 */
657void intel_uncore_forcewake_user_get(struct intel_uncore *uncore)
658{
659 spin_lock_irq(&uncore->lock);
660 if (!uncore->user_forcewake_count++) {
661 intel_uncore_forcewake_get__locked(uncore, FORCEWAKE_ALL);
662 spin_lock(&uncore->debug->lock);
663 mmio_debug_suspend(uncore->debug);
664 spin_unlock(&uncore->debug->lock);
665 }
666 spin_unlock_irq(&uncore->lock);
667}
668
669/**
670 * intel_uncore_forcewake_user_put - release forcewake on behalf of userspace
671 * @uncore: the intel_uncore structure
672 *
673 * This function complements intel_uncore_forcewake_user_get() and releases
674 * the GT powerwell taken on behalf of the userspace bypass.
675 */
676void intel_uncore_forcewake_user_put(struct intel_uncore *uncore)
677{
678 spin_lock_irq(&uncore->lock);
679 if (!--uncore->user_forcewake_count) {
680 spin_lock(&uncore->debug->lock);
681 mmio_debug_resume(uncore->debug);
682
683 if (check_for_unclaimed_mmio(uncore))
684 drm_info(&uncore->i915->drm,
685 "Invalid mmio detected during user access\n");
686 spin_unlock(&uncore->debug->lock);
687
688 intel_uncore_forcewake_put__locked(uncore, FORCEWAKE_ALL);
689 }
690 spin_unlock_irq(&uncore->lock);
691}
692
693/**
694 * intel_uncore_forcewake_get__locked - grab forcewake domain references
695 * @uncore: the intel_uncore structure
696 * @fw_domains: forcewake domains to get reference on
697 *
698 * See intel_uncore_forcewake_get(). This variant places the onus
699 * on the caller to explicitly handle the dev_priv->uncore.lock spinlock.
700 */
701void intel_uncore_forcewake_get__locked(struct intel_uncore *uncore,
702 enum forcewake_domains fw_domains)
703{
704 lockdep_assert_held(&uncore->lock);
705
706 if (!uncore->funcs.force_wake_get)
707 return;
708
709 __intel_uncore_forcewake_get(uncore, fw_domains);
710}
711
712static void __intel_uncore_forcewake_put(struct intel_uncore *uncore,
713 enum forcewake_domains fw_domains)
714{
715 struct intel_uncore_forcewake_domain *domain;
716 unsigned int tmp;
717
718 fw_domains &= uncore->fw_domains;
719
720 for_each_fw_domain_masked(domain, fw_domains, uncore, tmp) {
721 GEM_BUG_ON(!domain->wake_count);
722
723 if (--domain->wake_count) {
724 domain->active = true;
725 continue;
726 }
727
728 uncore->funcs.force_wake_put(uncore, domain->mask);
729 }
730}
731
732/**
733 * intel_uncore_forcewake_put - release a forcewake domain reference
734 * @uncore: the intel_uncore structure
735 * @fw_domains: forcewake domains to put references
736 *
737 * This function drops the device-level forcewakes for specified
738 * domains obtained by intel_uncore_forcewake_get().
739 */
740void intel_uncore_forcewake_put(struct intel_uncore *uncore,
741 enum forcewake_domains fw_domains)
742{
743 unsigned long irqflags;
744
745 if (!uncore->funcs.force_wake_put)
746 return;
747
748 spin_lock_irqsave(&uncore->lock, irqflags);
749 __intel_uncore_forcewake_put(uncore, fw_domains);
750 spin_unlock_irqrestore(&uncore->lock, irqflags);
751}
752
753/**
754 * intel_uncore_forcewake_flush - flush the delayed release
755 * @uncore: the intel_uncore structure
756 * @fw_domains: forcewake domains to flush
757 */
758void intel_uncore_forcewake_flush(struct intel_uncore *uncore,
759 enum forcewake_domains fw_domains)
760{
761 struct intel_uncore_forcewake_domain *domain;
762 unsigned int tmp;
763
764 if (!uncore->funcs.force_wake_put)
765 return;
766
767 fw_domains &= uncore->fw_domains;
768 for_each_fw_domain_masked(domain, fw_domains, uncore, tmp) {
769 WRITE_ONCE(domain->active, false);
770 if (hrtimer_cancel(&domain->timer))
771 intel_uncore_fw_release_timer(&domain->timer);
772 }
773}
774
775/**
776 * intel_uncore_forcewake_put__locked - grab forcewake domain references
777 * @uncore: the intel_uncore structure
778 * @fw_domains: forcewake domains to get reference on
779 *
780 * See intel_uncore_forcewake_put(). This variant places the onus
781 * on the caller to explicitly handle the dev_priv->uncore.lock spinlock.
782 */
783void intel_uncore_forcewake_put__locked(struct intel_uncore *uncore,
784 enum forcewake_domains fw_domains)
785{
786 lockdep_assert_held(&uncore->lock);
787
788 if (!uncore->funcs.force_wake_put)
789 return;
790
791 __intel_uncore_forcewake_put(uncore, fw_domains);
792}
793
794void assert_forcewakes_inactive(struct intel_uncore *uncore)
795{
796 if (!uncore->funcs.force_wake_get)
797 return;
798
799 drm_WARN(&uncore->i915->drm, uncore->fw_domains_active,
800 "Expected all fw_domains to be inactive, but %08x are still on\n",
801 uncore->fw_domains_active);
802}
803
804void assert_forcewakes_active(struct intel_uncore *uncore,
805 enum forcewake_domains fw_domains)
806{
807 struct intel_uncore_forcewake_domain *domain;
808 unsigned int tmp;
809
810 if (!IS_ENABLED(CONFIG_DRM_I915_DEBUG_RUNTIME_PM))
811 return;
812
813 if (!uncore->funcs.force_wake_get)
814 return;
815
816 spin_lock_irq(&uncore->lock);
817
818 assert_rpm_wakelock_held(uncore->rpm);
819
820 fw_domains &= uncore->fw_domains;
821 drm_WARN(&uncore->i915->drm, fw_domains & ~uncore->fw_domains_active,
822 "Expected %08x fw_domains to be active, but %08x are off\n",
823 fw_domains, fw_domains & ~uncore->fw_domains_active);
824
825 /*
826 * Check that the caller has an explicit wakeref and we don't mistake
827 * it for the auto wakeref.
828 */
829 for_each_fw_domain_masked(domain, fw_domains, uncore, tmp) {
830 unsigned int actual = READ_ONCE(domain->wake_count);
831 unsigned int expect = 1;
832
833 if (uncore->fw_domains_timer & domain->mask)
834 expect++; /* pending automatic release */
835
836 if (drm_WARN(&uncore->i915->drm, actual < expect,
837 "Expected domain %d to be held awake by caller, count=%d\n",
838 domain->id, actual))
839 break;
840 }
841
842 spin_unlock_irq(&uncore->lock);
843}
844
845/* We give fast paths for the really cool registers */
846#define NEEDS_FORCE_WAKE(reg) ((reg) < 0x40000)
847
848#define __gen6_reg_read_fw_domains(uncore, offset) \
849({ \
850 enum forcewake_domains __fwd; \
851 if (NEEDS_FORCE_WAKE(offset)) \
852 __fwd = FORCEWAKE_RENDER; \
853 else \
854 __fwd = 0; \
855 __fwd; \
856})
857
858static int fw_range_cmp(u32 offset, const struct intel_forcewake_range *entry)
859{
860 if (offset < entry->start)
861 return -1;
862 else if (offset > entry->end)
863 return 1;
864 else
865 return 0;
866}
867
868/* Copied and "macroized" from lib/bsearch.c */
869#define BSEARCH(key, base, num, cmp) ({ \
870 unsigned int start__ = 0, end__ = (num); \
871 typeof(base) result__ = NULL; \
872 while (start__ < end__) { \
873 unsigned int mid__ = start__ + (end__ - start__) / 2; \
874 int ret__ = (cmp)((key), (base) + mid__); \
875 if (ret__ < 0) { \
876 end__ = mid__; \
877 } else if (ret__ > 0) { \
878 start__ = mid__ + 1; \
879 } else { \
880 result__ = (base) + mid__; \
881 break; \
882 } \
883 } \
884 result__; \
885})
886
887static enum forcewake_domains
888find_fw_domain(struct intel_uncore *uncore, u32 offset)
889{
890 const struct intel_forcewake_range *entry;
891
892 entry = BSEARCH(offset,
893 uncore->fw_domains_table,
894 uncore->fw_domains_table_entries,
895 fw_range_cmp);
896
897 if (!entry)
898 return 0;
899
900 /*
901 * The list of FW domains depends on the SKU in gen11+ so we
902 * can't determine it statically. We use FORCEWAKE_ALL and
903 * translate it here to the list of available domains.
904 */
905 if (entry->domains == FORCEWAKE_ALL)
906 return uncore->fw_domains;
907
908 drm_WARN(&uncore->i915->drm, entry->domains & ~uncore->fw_domains,
909 "Uninitialized forcewake domain(s) 0x%x accessed at 0x%x\n",
910 entry->domains & ~uncore->fw_domains, offset);
911
912 return entry->domains;
913}
914
915#define GEN_FW_RANGE(s, e, d) \
916 { .start = (s), .end = (e), .domains = (d) }
917
918/* *Must* be sorted by offset ranges! See intel_fw_table_check(). */
919static const struct intel_forcewake_range __vlv_fw_ranges[] = {
920 GEN_FW_RANGE(0x2000, 0x3fff, FORCEWAKE_RENDER),
921 GEN_FW_RANGE(0x5000, 0x7fff, FORCEWAKE_RENDER),
922 GEN_FW_RANGE(0xb000, 0x11fff, FORCEWAKE_RENDER),
923 GEN_FW_RANGE(0x12000, 0x13fff, FORCEWAKE_MEDIA),
924 GEN_FW_RANGE(0x22000, 0x23fff, FORCEWAKE_MEDIA),
925 GEN_FW_RANGE(0x2e000, 0x2ffff, FORCEWAKE_RENDER),
926 GEN_FW_RANGE(0x30000, 0x3ffff, FORCEWAKE_MEDIA),
927};
928
929#define __fwtable_reg_read_fw_domains(uncore, offset) \
930({ \
931 enum forcewake_domains __fwd = 0; \
932 if (NEEDS_FORCE_WAKE((offset))) \
933 __fwd = find_fw_domain(uncore, offset); \
934 __fwd; \
935})
936
937#define __gen11_fwtable_reg_read_fw_domains(uncore, offset) \
938 find_fw_domain(uncore, offset)
939
940#define __gen12_fwtable_reg_read_fw_domains(uncore, offset) \
941 find_fw_domain(uncore, offset)
942
943/* *Must* be sorted by offset! See intel_shadow_table_check(). */
944static const i915_reg_t gen8_shadowed_regs[] = {
945 RING_TAIL(RENDER_RING_BASE), /* 0x2000 (base) */
946 GEN6_RPNSWREQ, /* 0xA008 */
947 GEN6_RC_VIDEO_FREQ, /* 0xA00C */
948 RING_TAIL(GEN6_BSD_RING_BASE), /* 0x12000 (base) */
949 RING_TAIL(VEBOX_RING_BASE), /* 0x1a000 (base) */
950 RING_TAIL(BLT_RING_BASE), /* 0x22000 (base) */
951 /* TODO: Other registers are not yet used */
952};
953
954static const i915_reg_t gen11_shadowed_regs[] = {
955 RING_TAIL(RENDER_RING_BASE), /* 0x2000 (base) */
956 GEN6_RPNSWREQ, /* 0xA008 */
957 GEN6_RC_VIDEO_FREQ, /* 0xA00C */
958 RING_TAIL(BLT_RING_BASE), /* 0x22000 (base) */
959 RING_TAIL(GEN11_BSD_RING_BASE), /* 0x1C0000 (base) */
960 RING_TAIL(GEN11_BSD2_RING_BASE), /* 0x1C4000 (base) */
961 RING_TAIL(GEN11_VEBOX_RING_BASE), /* 0x1C8000 (base) */
962 RING_TAIL(GEN11_BSD3_RING_BASE), /* 0x1D0000 (base) */
963 RING_TAIL(GEN11_BSD4_RING_BASE), /* 0x1D4000 (base) */
964 RING_TAIL(GEN11_VEBOX2_RING_BASE), /* 0x1D8000 (base) */
965 /* TODO: Other registers are not yet used */
966};
967
968static const i915_reg_t gen12_shadowed_regs[] = {
969 RING_TAIL(RENDER_RING_BASE), /* 0x2000 (base) */
970 GEN6_RPNSWREQ, /* 0xA008 */
971 GEN6_RC_VIDEO_FREQ, /* 0xA00C */
972 RING_TAIL(BLT_RING_BASE), /* 0x22000 (base) */
973 RING_TAIL(GEN11_BSD_RING_BASE), /* 0x1C0000 (base) */
974 RING_TAIL(GEN11_BSD2_RING_BASE), /* 0x1C4000 (base) */
975 RING_TAIL(GEN11_VEBOX_RING_BASE), /* 0x1C8000 (base) */
976 RING_TAIL(GEN11_BSD3_RING_BASE), /* 0x1D0000 (base) */
977 RING_TAIL(GEN11_BSD4_RING_BASE), /* 0x1D4000 (base) */
978 RING_TAIL(GEN11_VEBOX2_RING_BASE), /* 0x1D8000 (base) */
979 /* TODO: Other registers are not yet used */
980};
981
982static int mmio_reg_cmp(u32 key, const i915_reg_t *reg)
983{
984 u32 offset = i915_mmio_reg_offset(*reg);
985
986 if (key < offset)
987 return -1;
988 else if (key > offset)
989 return 1;
990 else
991 return 0;
992}
993
994#define __is_genX_shadowed(x) \
995static bool is_gen##x##_shadowed(u32 offset) \
996{ \
997 const i915_reg_t *regs = gen##x##_shadowed_regs; \
998 return BSEARCH(offset, regs, ARRAY_SIZE(gen##x##_shadowed_regs), \
999 mmio_reg_cmp); \
1000}
1001
1002__is_genX_shadowed(8)
1003__is_genX_shadowed(11)
1004__is_genX_shadowed(12)
1005
1006static enum forcewake_domains
1007gen6_reg_write_fw_domains(struct intel_uncore *uncore, i915_reg_t reg)
1008{
1009 return FORCEWAKE_RENDER;
1010}
1011
1012#define __gen8_reg_write_fw_domains(uncore, offset) \
1013({ \
1014 enum forcewake_domains __fwd; \
1015 if (NEEDS_FORCE_WAKE(offset) && !is_gen8_shadowed(offset)) \
1016 __fwd = FORCEWAKE_RENDER; \
1017 else \
1018 __fwd = 0; \
1019 __fwd; \
1020})
1021
1022/* *Must* be sorted by offset ranges! See intel_fw_table_check(). */
1023static const struct intel_forcewake_range __chv_fw_ranges[] = {
1024 GEN_FW_RANGE(0x2000, 0x3fff, FORCEWAKE_RENDER),
1025 GEN_FW_RANGE(0x4000, 0x4fff, FORCEWAKE_RENDER | FORCEWAKE_MEDIA),
1026 GEN_FW_RANGE(0x5200, 0x7fff, FORCEWAKE_RENDER),
1027 GEN_FW_RANGE(0x8000, 0x82ff, FORCEWAKE_RENDER | FORCEWAKE_MEDIA),
1028 GEN_FW_RANGE(0x8300, 0x84ff, FORCEWAKE_RENDER),
1029 GEN_FW_RANGE(0x8500, 0x85ff, FORCEWAKE_RENDER | FORCEWAKE_MEDIA),
1030 GEN_FW_RANGE(0x8800, 0x88ff, FORCEWAKE_MEDIA),
1031 GEN_FW_RANGE(0x9000, 0xafff, FORCEWAKE_RENDER | FORCEWAKE_MEDIA),
1032 GEN_FW_RANGE(0xb000, 0xb47f, FORCEWAKE_RENDER),
1033 GEN_FW_RANGE(0xd000, 0xd7ff, FORCEWAKE_MEDIA),
1034 GEN_FW_RANGE(0xe000, 0xe7ff, FORCEWAKE_RENDER),
1035 GEN_FW_RANGE(0xf000, 0xffff, FORCEWAKE_RENDER | FORCEWAKE_MEDIA),
1036 GEN_FW_RANGE(0x12000, 0x13fff, FORCEWAKE_MEDIA),
1037 GEN_FW_RANGE(0x1a000, 0x1bfff, FORCEWAKE_MEDIA),
1038 GEN_FW_RANGE(0x1e800, 0x1e9ff, FORCEWAKE_MEDIA),
1039 GEN_FW_RANGE(0x30000, 0x37fff, FORCEWAKE_MEDIA),
1040};
1041
1042#define __fwtable_reg_write_fw_domains(uncore, offset) \
1043({ \
1044 enum forcewake_domains __fwd = 0; \
1045 if (NEEDS_FORCE_WAKE((offset)) && !is_gen8_shadowed(offset)) \
1046 __fwd = find_fw_domain(uncore, offset); \
1047 __fwd; \
1048})
1049
1050#define __gen11_fwtable_reg_write_fw_domains(uncore, offset) \
1051({ \
1052 enum forcewake_domains __fwd = 0; \
1053 const u32 __offset = (offset); \
1054 if (!is_gen11_shadowed(__offset)) \
1055 __fwd = find_fw_domain(uncore, __offset); \
1056 __fwd; \
1057})
1058
1059#define __gen12_fwtable_reg_write_fw_domains(uncore, offset) \
1060({ \
1061 enum forcewake_domains __fwd = 0; \
1062 const u32 __offset = (offset); \
1063 if (!is_gen12_shadowed(__offset)) \
1064 __fwd = find_fw_domain(uncore, __offset); \
1065 __fwd; \
1066})
1067
1068/* *Must* be sorted by offset ranges! See intel_fw_table_check(). */
1069static const struct intel_forcewake_range __gen9_fw_ranges[] = {
1070 GEN_FW_RANGE(0x0, 0xaff, FORCEWAKE_GT),
1071 GEN_FW_RANGE(0xb00, 0x1fff, 0), /* uncore range */
1072 GEN_FW_RANGE(0x2000, 0x26ff, FORCEWAKE_RENDER),
1073 GEN_FW_RANGE(0x2700, 0x2fff, FORCEWAKE_GT),
1074 GEN_FW_RANGE(0x3000, 0x3fff, FORCEWAKE_RENDER),
1075 GEN_FW_RANGE(0x4000, 0x51ff, FORCEWAKE_GT),
1076 GEN_FW_RANGE(0x5200, 0x7fff, FORCEWAKE_RENDER),
1077 GEN_FW_RANGE(0x8000, 0x812f, FORCEWAKE_GT),
1078 GEN_FW_RANGE(0x8130, 0x813f, FORCEWAKE_MEDIA),
1079 GEN_FW_RANGE(0x8140, 0x815f, FORCEWAKE_RENDER),
1080 GEN_FW_RANGE(0x8160, 0x82ff, FORCEWAKE_GT),
1081 GEN_FW_RANGE(0x8300, 0x84ff, FORCEWAKE_RENDER),
1082 GEN_FW_RANGE(0x8500, 0x87ff, FORCEWAKE_GT),
1083 GEN_FW_RANGE(0x8800, 0x89ff, FORCEWAKE_MEDIA),
1084 GEN_FW_RANGE(0x8a00, 0x8bff, FORCEWAKE_GT),
1085 GEN_FW_RANGE(0x8c00, 0x8cff, FORCEWAKE_RENDER),
1086 GEN_FW_RANGE(0x8d00, 0x93ff, FORCEWAKE_GT),
1087 GEN_FW_RANGE(0x9400, 0x97ff, FORCEWAKE_RENDER | FORCEWAKE_MEDIA),
1088 GEN_FW_RANGE(0x9800, 0xafff, FORCEWAKE_GT),
1089 GEN_FW_RANGE(0xb000, 0xb47f, FORCEWAKE_RENDER),
1090 GEN_FW_RANGE(0xb480, 0xcfff, FORCEWAKE_GT),
1091 GEN_FW_RANGE(0xd000, 0xd7ff, FORCEWAKE_MEDIA),
1092 GEN_FW_RANGE(0xd800, 0xdfff, FORCEWAKE_GT),
1093 GEN_FW_RANGE(0xe000, 0xe8ff, FORCEWAKE_RENDER),
1094 GEN_FW_RANGE(0xe900, 0x11fff, FORCEWAKE_GT),
1095 GEN_FW_RANGE(0x12000, 0x13fff, FORCEWAKE_MEDIA),
1096 GEN_FW_RANGE(0x14000, 0x19fff, FORCEWAKE_GT),
1097 GEN_FW_RANGE(0x1a000, 0x1e9ff, FORCEWAKE_MEDIA),
1098 GEN_FW_RANGE(0x1ea00, 0x243ff, FORCEWAKE_GT),
1099 GEN_FW_RANGE(0x24400, 0x247ff, FORCEWAKE_RENDER),
1100 GEN_FW_RANGE(0x24800, 0x2ffff, FORCEWAKE_GT),
1101 GEN_FW_RANGE(0x30000, 0x3ffff, FORCEWAKE_MEDIA),
1102};
1103
1104/* *Must* be sorted by offset ranges! See intel_fw_table_check(). */
1105static const struct intel_forcewake_range __gen11_fw_ranges[] = {
1106 GEN_FW_RANGE(0x0, 0x1fff, 0), /* uncore range */
1107 GEN_FW_RANGE(0x2000, 0x26ff, FORCEWAKE_RENDER),
1108 GEN_FW_RANGE(0x2700, 0x2fff, FORCEWAKE_GT),
1109 GEN_FW_RANGE(0x3000, 0x3fff, FORCEWAKE_RENDER),
1110 GEN_FW_RANGE(0x4000, 0x51ff, FORCEWAKE_GT),
1111 GEN_FW_RANGE(0x5200, 0x7fff, FORCEWAKE_RENDER),
1112 GEN_FW_RANGE(0x8000, 0x813f, FORCEWAKE_GT),
1113 GEN_FW_RANGE(0x8140, 0x815f, FORCEWAKE_RENDER),
1114 GEN_FW_RANGE(0x8160, 0x82ff, FORCEWAKE_GT),
1115 GEN_FW_RANGE(0x8300, 0x84ff, FORCEWAKE_RENDER),
1116 GEN_FW_RANGE(0x8500, 0x87ff, FORCEWAKE_GT),
1117 GEN_FW_RANGE(0x8800, 0x8bff, 0),
1118 GEN_FW_RANGE(0x8c00, 0x8cff, FORCEWAKE_RENDER),
1119 GEN_FW_RANGE(0x8d00, 0x94cf, FORCEWAKE_GT),
1120 GEN_FW_RANGE(0x94d0, 0x955f, FORCEWAKE_RENDER),
1121 GEN_FW_RANGE(0x9560, 0x95ff, 0),
1122 GEN_FW_RANGE(0x9600, 0xafff, FORCEWAKE_GT),
1123 GEN_FW_RANGE(0xb000, 0xb47f, FORCEWAKE_RENDER),
1124 GEN_FW_RANGE(0xb480, 0xdeff, FORCEWAKE_GT),
1125 GEN_FW_RANGE(0xdf00, 0xe8ff, FORCEWAKE_RENDER),
1126 GEN_FW_RANGE(0xe900, 0x16dff, FORCEWAKE_GT),
1127 GEN_FW_RANGE(0x16e00, 0x19fff, FORCEWAKE_RENDER),
1128 GEN_FW_RANGE(0x1a000, 0x23fff, FORCEWAKE_GT),
1129 GEN_FW_RANGE(0x24000, 0x2407f, 0),
1130 GEN_FW_RANGE(0x24080, 0x2417f, FORCEWAKE_GT),
1131 GEN_FW_RANGE(0x24180, 0x242ff, FORCEWAKE_RENDER),
1132 GEN_FW_RANGE(0x24300, 0x243ff, FORCEWAKE_GT),
1133 GEN_FW_RANGE(0x24400, 0x24fff, FORCEWAKE_RENDER),
1134 GEN_FW_RANGE(0x25000, 0x3ffff, FORCEWAKE_GT),
1135 GEN_FW_RANGE(0x40000, 0x1bffff, 0),
1136 GEN_FW_RANGE(0x1c0000, 0x1c3fff, FORCEWAKE_MEDIA_VDBOX0),
1137 GEN_FW_RANGE(0x1c4000, 0x1c7fff, 0),
1138 GEN_FW_RANGE(0x1c8000, 0x1cffff, FORCEWAKE_MEDIA_VEBOX0),
1139 GEN_FW_RANGE(0x1d0000, 0x1d3fff, FORCEWAKE_MEDIA_VDBOX2),
1140 GEN_FW_RANGE(0x1d4000, 0x1dbfff, 0)
1141};
1142
1143/*
1144 * *Must* be sorted by offset ranges! See intel_fw_table_check().
1145 *
1146 * Note that the spec lists several reserved/unused ranges that don't
1147 * actually contain any registers. In the table below we'll combine those
1148 * reserved ranges with either the preceding or following range to keep the
1149 * table small and lookups fast.
1150 */
1151static const struct intel_forcewake_range __gen12_fw_ranges[] = {
1152 GEN_FW_RANGE(0x0, 0x1fff, 0), /*
1153 0x0 - 0xaff: reserved
1154 0xb00 - 0x1fff: always on */
1155 GEN_FW_RANGE(0x2000, 0x26ff, FORCEWAKE_RENDER),
1156 GEN_FW_RANGE(0x2700, 0x27ff, FORCEWAKE_GT),
1157 GEN_FW_RANGE(0x2800, 0x2aff, FORCEWAKE_RENDER),
1158 GEN_FW_RANGE(0x2b00, 0x2fff, FORCEWAKE_GT),
1159 GEN_FW_RANGE(0x3000, 0x3fff, FORCEWAKE_RENDER),
1160 GEN_FW_RANGE(0x4000, 0x51ff, FORCEWAKE_GT), /*
1161 0x4000 - 0x48ff: gt
1162 0x4900 - 0x51ff: reserved */
1163 GEN_FW_RANGE(0x5200, 0x7fff, FORCEWAKE_RENDER), /*
1164 0x5200 - 0x53ff: render
1165 0x5400 - 0x54ff: reserved
1166 0x5500 - 0x7fff: render */
1167 GEN_FW_RANGE(0x8000, 0x813f, FORCEWAKE_GT),
1168 GEN_FW_RANGE(0x8140, 0x815f, FORCEWAKE_RENDER),
1169 GEN_FW_RANGE(0x8160, 0x81ff, 0), /*
1170 0x8160 - 0x817f: reserved
1171 0x8180 - 0x81ff: always on */
1172 GEN_FW_RANGE(0x8200, 0x82ff, FORCEWAKE_GT),
1173 GEN_FW_RANGE(0x8300, 0x84ff, FORCEWAKE_RENDER),
1174 GEN_FW_RANGE(0x8500, 0x94cf, FORCEWAKE_GT), /*
1175 0x8500 - 0x87ff: gt
1176 0x8800 - 0x8fff: reserved
1177 0x9000 - 0x947f: gt
1178 0x9480 - 0x94cf: reserved */
1179 GEN_FW_RANGE(0x94d0, 0x955f, FORCEWAKE_RENDER),
1180 GEN_FW_RANGE(0x9560, 0x97ff, 0), /*
1181 0x9560 - 0x95ff: always on
1182 0x9600 - 0x97ff: reserved */
1183 GEN_FW_RANGE(0x9800, 0xafff, FORCEWAKE_GT),
1184 GEN_FW_RANGE(0xb000, 0xb3ff, FORCEWAKE_RENDER),
1185 GEN_FW_RANGE(0xb400, 0xcfff, FORCEWAKE_GT), /*
1186 0xb400 - 0xbf7f: gt
1187 0xb480 - 0xbfff: reserved
1188 0xc000 - 0xcfff: gt */
1189 GEN_FW_RANGE(0xd000, 0xd7ff, 0),
1190 GEN_FW_RANGE(0xd800, 0xd8ff, FORCEWAKE_RENDER),
1191 GEN_FW_RANGE(0xd900, 0xdbff, FORCEWAKE_GT),
1192 GEN_FW_RANGE(0xdc00, 0xefff, FORCEWAKE_RENDER), /*
1193 0xdc00 - 0xddff: render
1194 0xde00 - 0xde7f: reserved
1195 0xde80 - 0xe8ff: render
1196 0xe900 - 0xefff: reserved */
1197 GEN_FW_RANGE(0xf000, 0x147ff, FORCEWAKE_GT), /*
1198 0xf000 - 0xffff: gt
1199 0x10000 - 0x147ff: reserved */
1200 GEN_FW_RANGE(0x14800, 0x1ffff, FORCEWAKE_RENDER), /*
1201 0x14800 - 0x14fff: render
1202 0x15000 - 0x16dff: reserved
1203 0x16e00 - 0x1bfff: render
1204 0x1c000 - 0x1ffff: reserved */
1205 GEN_FW_RANGE(0x20000, 0x20fff, FORCEWAKE_MEDIA_VDBOX0),
1206 GEN_FW_RANGE(0x21000, 0x21fff, FORCEWAKE_MEDIA_VDBOX2),
1207 GEN_FW_RANGE(0x22000, 0x23fff, FORCEWAKE_GT),
1208 GEN_FW_RANGE(0x24000, 0x2417f, 0), /*
1209 0x24000 - 0x2407f: always on
1210 0x24080 - 0x2417f: reserved */
1211 GEN_FW_RANGE(0x24180, 0x249ff, FORCEWAKE_GT), /*
1212 0x24180 - 0x241ff: gt
1213 0x24200 - 0x249ff: reserved */
1214 GEN_FW_RANGE(0x24a00, 0x251ff, FORCEWAKE_RENDER), /*
1215 0x24a00 - 0x24a7f: render
1216 0x24a80 - 0x251ff: reserved */
1217 GEN_FW_RANGE(0x25200, 0x255ff, FORCEWAKE_GT), /*
1218 0x25200 - 0x252ff: gt
1219 0x25300 - 0x255ff: reserved */
1220 GEN_FW_RANGE(0x25600, 0x2567f, FORCEWAKE_MEDIA_VDBOX0),
1221 GEN_FW_RANGE(0x25680, 0x259ff, FORCEWAKE_MEDIA_VDBOX2), /*
1222 0x25680 - 0x256ff: VD2
1223 0x25700 - 0x259ff: reserved */
1224 GEN_FW_RANGE(0x25a00, 0x25a7f, FORCEWAKE_MEDIA_VDBOX0),
1225 GEN_FW_RANGE(0x25a80, 0x2ffff, FORCEWAKE_MEDIA_VDBOX2), /*
1226 0x25a80 - 0x25aff: VD2
1227 0x25b00 - 0x2ffff: reserved */
1228 GEN_FW_RANGE(0x30000, 0x3ffff, FORCEWAKE_GT),
1229 GEN_FW_RANGE(0x40000, 0x1bffff, 0),
1230 GEN_FW_RANGE(0x1c0000, 0x1c3fff, FORCEWAKE_MEDIA_VDBOX0), /*
1231 0x1c0000 - 0x1c2bff: VD0
1232 0x1c2c00 - 0x1c2cff: reserved
1233 0x1c2d00 - 0x1c2dff: VD0
1234 0x1c2e00 - 0x1c3eff: reserved
1235 0x1c3f00 - 0x1c3fff: VD0 */
1236 GEN_FW_RANGE(0x1c4000, 0x1c7fff, 0),
1237 GEN_FW_RANGE(0x1c8000, 0x1cbfff, FORCEWAKE_MEDIA_VEBOX0), /*
1238 0x1c8000 - 0x1ca0ff: VE0
1239 0x1ca100 - 0x1cbeff: reserved
1240 0x1cbf00 - 0x1cbfff: VE0 */
1241 GEN_FW_RANGE(0x1cc000, 0x1cffff, FORCEWAKE_MEDIA_VDBOX0), /*
1242 0x1cc000 - 0x1ccfff: VD0
1243 0x1cd000 - 0x1cffff: reserved */
1244 GEN_FW_RANGE(0x1d0000, 0x1d3fff, FORCEWAKE_MEDIA_VDBOX2), /*
1245 0x1d0000 - 0x1d2bff: VD2
1246 0x1d2c00 - 0x1d2cff: reserved
1247 0x1d2d00 - 0x1d2dff: VD2
1248 0x1d2e00 - 0x1d3eff: reserved
1249 0x1d3f00 - 0x1d3fff: VD2 */
1250};
1251
1252static void
1253ilk_dummy_write(struct intel_uncore *uncore)
1254{
1255 /* WaIssueDummyWriteToWakeupFromRC6:ilk Issue a dummy write to wake up
1256 * the chip from rc6 before touching it for real. MI_MODE is masked,
1257 * hence harmless to write 0 into. */
1258 __raw_uncore_write32(uncore, MI_MODE, 0);
1259}
1260
1261static void
1262__unclaimed_reg_debug(struct intel_uncore *uncore,
1263 const i915_reg_t reg,
1264 const bool read,
1265 const bool before)
1266{
1267 if (drm_WARN(&uncore->i915->drm,
1268 check_for_unclaimed_mmio(uncore) && !before,
1269 "Unclaimed %s register 0x%x\n",
1270 read ? "read from" : "write to",
1271 i915_mmio_reg_offset(reg)))
1272 /* Only report the first N failures */
1273 uncore->i915->params.mmio_debug--;
1274}
1275
1276static inline void
1277unclaimed_reg_debug(struct intel_uncore *uncore,
1278 const i915_reg_t reg,
1279 const bool read,
1280 const bool before)
1281{
1282 if (likely(!uncore->i915->params.mmio_debug))
1283 return;
1284
1285 /* interrupts are disabled and re-enabled around uncore->lock usage */
1286 lockdep_assert_held(&uncore->lock);
1287
1288 if (before)
1289 spin_lock(&uncore->debug->lock);
1290
1291 __unclaimed_reg_debug(uncore, reg, read, before);
1292
1293 if (!before)
1294 spin_unlock(&uncore->debug->lock);
1295}
1296
1297#define __vgpu_read(x) \
1298static u##x \
1299vgpu_read##x(struct intel_uncore *uncore, i915_reg_t reg, bool trace) { \
1300 u##x val = __raw_uncore_read##x(uncore, reg); \
1301 trace_i915_reg_rw(false, reg, val, sizeof(val), trace); \
1302 return val; \
1303}
1304__vgpu_read(8)
1305__vgpu_read(16)
1306__vgpu_read(32)
1307__vgpu_read(64)
1308
1309#define GEN2_READ_HEADER(x) \
1310 u##x val = 0; \
1311 assert_rpm_wakelock_held(uncore->rpm);
1312
1313#define GEN2_READ_FOOTER \
1314 trace_i915_reg_rw(false, reg, val, sizeof(val), trace); \
1315 return val
1316
1317#define __gen2_read(x) \
1318static u##x \
1319gen2_read##x(struct intel_uncore *uncore, i915_reg_t reg, bool trace) { \
1320 GEN2_READ_HEADER(x); \
1321 val = __raw_uncore_read##x(uncore, reg); \
1322 GEN2_READ_FOOTER; \
1323}
1324
1325#define __gen5_read(x) \
1326static u##x \
1327gen5_read##x(struct intel_uncore *uncore, i915_reg_t reg, bool trace) { \
1328 GEN2_READ_HEADER(x); \
1329 ilk_dummy_write(uncore); \
1330 val = __raw_uncore_read##x(uncore, reg); \
1331 GEN2_READ_FOOTER; \
1332}
1333
1334__gen5_read(8)
1335__gen5_read(16)
1336__gen5_read(32)
1337__gen5_read(64)
1338__gen2_read(8)
1339__gen2_read(16)
1340__gen2_read(32)
1341__gen2_read(64)
1342
1343#undef __gen5_read
1344#undef __gen2_read
1345
1346#undef GEN2_READ_FOOTER
1347#undef GEN2_READ_HEADER
1348
1349#define GEN6_READ_HEADER(x) \
1350 u32 offset = i915_mmio_reg_offset(reg); \
1351 unsigned long irqflags; \
1352 u##x val = 0; \
1353 assert_rpm_wakelock_held(uncore->rpm); \
1354 spin_lock_irqsave(&uncore->lock, irqflags); \
1355 unclaimed_reg_debug(uncore, reg, true, true)
1356
1357#define GEN6_READ_FOOTER \
1358 unclaimed_reg_debug(uncore, reg, true, false); \
1359 spin_unlock_irqrestore(&uncore->lock, irqflags); \
1360 trace_i915_reg_rw(false, reg, val, sizeof(val), trace); \
1361 return val
1362
1363static noinline void ___force_wake_auto(struct intel_uncore *uncore,
1364 enum forcewake_domains fw_domains)
1365{
1366 struct intel_uncore_forcewake_domain *domain;
1367 unsigned int tmp;
1368
1369 GEM_BUG_ON(fw_domains & ~uncore->fw_domains);
1370
1371 for_each_fw_domain_masked(domain, fw_domains, uncore, tmp)
1372 fw_domain_arm_timer(domain);
1373
1374 uncore->funcs.force_wake_get(uncore, fw_domains);
1375}
1376
1377static inline void __force_wake_auto(struct intel_uncore *uncore,
1378 enum forcewake_domains fw_domains)
1379{
1380 GEM_BUG_ON(!fw_domains);
1381
1382 /* Turn on all requested but inactive supported forcewake domains. */
1383 fw_domains &= uncore->fw_domains;
1384 fw_domains &= ~uncore->fw_domains_active;
1385
1386 if (fw_domains)
1387 ___force_wake_auto(uncore, fw_domains);
1388}
1389
1390#define __gen_read(func, x) \
1391static u##x \
1392func##_read##x(struct intel_uncore *uncore, i915_reg_t reg, bool trace) { \
1393 enum forcewake_domains fw_engine; \
1394 GEN6_READ_HEADER(x); \
1395 fw_engine = __##func##_reg_read_fw_domains(uncore, offset); \
1396 if (fw_engine) \
1397 __force_wake_auto(uncore, fw_engine); \
1398 val = __raw_uncore_read##x(uncore, reg); \
1399 GEN6_READ_FOOTER; \
1400}
1401
1402#define __gen_reg_read_funcs(func) \
1403static enum forcewake_domains \
1404func##_reg_read_fw_domains(struct intel_uncore *uncore, i915_reg_t reg) { \
1405 return __##func##_reg_read_fw_domains(uncore, i915_mmio_reg_offset(reg)); \
1406} \
1407\
1408__gen_read(func, 8) \
1409__gen_read(func, 16) \
1410__gen_read(func, 32) \
1411__gen_read(func, 64)
1412
1413__gen_reg_read_funcs(gen12_fwtable);
1414__gen_reg_read_funcs(gen11_fwtable);
1415__gen_reg_read_funcs(fwtable);
1416__gen_reg_read_funcs(gen6);
1417
1418#undef __gen_reg_read_funcs
1419#undef GEN6_READ_FOOTER
1420#undef GEN6_READ_HEADER
1421
1422#define GEN2_WRITE_HEADER \
1423 trace_i915_reg_rw(true, reg, val, sizeof(val), trace); \
1424 assert_rpm_wakelock_held(uncore->rpm); \
1425
1426#define GEN2_WRITE_FOOTER
1427
1428#define __gen2_write(x) \
1429static void \
1430gen2_write##x(struct intel_uncore *uncore, i915_reg_t reg, u##x val, bool trace) { \
1431 GEN2_WRITE_HEADER; \
1432 __raw_uncore_write##x(uncore, reg, val); \
1433 GEN2_WRITE_FOOTER; \
1434}
1435
1436#define __gen5_write(x) \
1437static void \
1438gen5_write##x(struct intel_uncore *uncore, i915_reg_t reg, u##x val, bool trace) { \
1439 GEN2_WRITE_HEADER; \
1440 ilk_dummy_write(uncore); \
1441 __raw_uncore_write##x(uncore, reg, val); \
1442 GEN2_WRITE_FOOTER; \
1443}
1444
1445__gen5_write(8)
1446__gen5_write(16)
1447__gen5_write(32)
1448__gen2_write(8)
1449__gen2_write(16)
1450__gen2_write(32)
1451
1452#undef __gen5_write
1453#undef __gen2_write
1454
1455#undef GEN2_WRITE_FOOTER
1456#undef GEN2_WRITE_HEADER
1457
1458#define GEN6_WRITE_HEADER \
1459 u32 offset = i915_mmio_reg_offset(reg); \
1460 unsigned long irqflags; \
1461 trace_i915_reg_rw(true, reg, val, sizeof(val), trace); \
1462 assert_rpm_wakelock_held(uncore->rpm); \
1463 spin_lock_irqsave(&uncore->lock, irqflags); \
1464 unclaimed_reg_debug(uncore, reg, false, true)
1465
1466#define GEN6_WRITE_FOOTER \
1467 unclaimed_reg_debug(uncore, reg, false, false); \
1468 spin_unlock_irqrestore(&uncore->lock, irqflags)
1469
1470#define __gen6_write(x) \
1471static void \
1472gen6_write##x(struct intel_uncore *uncore, i915_reg_t reg, u##x val, bool trace) { \
1473 GEN6_WRITE_HEADER; \
1474 if (NEEDS_FORCE_WAKE(offset)) \
1475 __gen6_gt_wait_for_fifo(uncore); \
1476 __raw_uncore_write##x(uncore, reg, val); \
1477 GEN6_WRITE_FOOTER; \
1478}
1479__gen6_write(8)
1480__gen6_write(16)
1481__gen6_write(32)
1482
1483#define __gen_write(func, x) \
1484static void \
1485func##_write##x(struct intel_uncore *uncore, i915_reg_t reg, u##x val, bool trace) { \
1486 enum forcewake_domains fw_engine; \
1487 GEN6_WRITE_HEADER; \
1488 fw_engine = __##func##_reg_write_fw_domains(uncore, offset); \
1489 if (fw_engine) \
1490 __force_wake_auto(uncore, fw_engine); \
1491 __raw_uncore_write##x(uncore, reg, val); \
1492 GEN6_WRITE_FOOTER; \
1493}
1494
1495#define __gen_reg_write_funcs(func) \
1496static enum forcewake_domains \
1497func##_reg_write_fw_domains(struct intel_uncore *uncore, i915_reg_t reg) { \
1498 return __##func##_reg_write_fw_domains(uncore, i915_mmio_reg_offset(reg)); \
1499} \
1500\
1501__gen_write(func, 8) \
1502__gen_write(func, 16) \
1503__gen_write(func, 32)
1504
1505__gen_reg_write_funcs(gen12_fwtable);
1506__gen_reg_write_funcs(gen11_fwtable);
1507__gen_reg_write_funcs(fwtable);
1508__gen_reg_write_funcs(gen8);
1509
1510#undef __gen_reg_write_funcs
1511#undef GEN6_WRITE_FOOTER
1512#undef GEN6_WRITE_HEADER
1513
1514#define __vgpu_write(x) \
1515static void \
1516vgpu_write##x(struct intel_uncore *uncore, i915_reg_t reg, u##x val, bool trace) { \
1517 trace_i915_reg_rw(true, reg, val, sizeof(val), trace); \
1518 __raw_uncore_write##x(uncore, reg, val); \
1519}
1520__vgpu_write(8)
1521__vgpu_write(16)
1522__vgpu_write(32)
1523
1524#define ASSIGN_RAW_WRITE_MMIO_VFUNCS(uncore, x) \
1525do { \
1526 (uncore)->funcs.mmio_writeb = x##_write8; \
1527 (uncore)->funcs.mmio_writew = x##_write16; \
1528 (uncore)->funcs.mmio_writel = x##_write32; \
1529} while (0)
1530
1531#define ASSIGN_RAW_READ_MMIO_VFUNCS(uncore, x) \
1532do { \
1533 (uncore)->funcs.mmio_readb = x##_read8; \
1534 (uncore)->funcs.mmio_readw = x##_read16; \
1535 (uncore)->funcs.mmio_readl = x##_read32; \
1536 (uncore)->funcs.mmio_readq = x##_read64; \
1537} while (0)
1538
1539#define ASSIGN_WRITE_MMIO_VFUNCS(uncore, x) \
1540do { \
1541 ASSIGN_RAW_WRITE_MMIO_VFUNCS((uncore), x); \
1542 (uncore)->funcs.write_fw_domains = x##_reg_write_fw_domains; \
1543} while (0)
1544
1545#define ASSIGN_READ_MMIO_VFUNCS(uncore, x) \
1546do { \
1547 ASSIGN_RAW_READ_MMIO_VFUNCS(uncore, x); \
1548 (uncore)->funcs.read_fw_domains = x##_reg_read_fw_domains; \
1549} while (0)
1550
1551static int __fw_domain_init(struct intel_uncore *uncore,
1552 enum forcewake_domain_id domain_id,
1553 i915_reg_t reg_set,
1554 i915_reg_t reg_ack)
1555{
1556 struct intel_uncore_forcewake_domain *d;
1557
1558 GEM_BUG_ON(domain_id >= FW_DOMAIN_ID_COUNT);
1559 GEM_BUG_ON(uncore->fw_domain[domain_id]);
1560
1561 if (i915_inject_probe_failure(uncore->i915))
1562 return -ENOMEM;
1563
1564 d = kzalloc(sizeof(*d), GFP_KERNEL);
1565 if (!d)
1566 return -ENOMEM;
1567
1568 drm_WARN_ON(&uncore->i915->drm, !i915_mmio_reg_valid(reg_set));
1569 drm_WARN_ON(&uncore->i915->drm, !i915_mmio_reg_valid(reg_ack));
1570
1571 d->uncore = uncore;
1572 d->wake_count = 0;
1573 d->reg_set = uncore->regs + i915_mmio_reg_offset(reg_set);
1574 d->reg_ack = uncore->regs + i915_mmio_reg_offset(reg_ack);
1575
1576 d->id = domain_id;
1577
1578 BUILD_BUG_ON(FORCEWAKE_RENDER != (1 << FW_DOMAIN_ID_RENDER));
1579 BUILD_BUG_ON(FORCEWAKE_GT != (1 << FW_DOMAIN_ID_GT));
1580 BUILD_BUG_ON(FORCEWAKE_MEDIA != (1 << FW_DOMAIN_ID_MEDIA));
1581 BUILD_BUG_ON(FORCEWAKE_MEDIA_VDBOX0 != (1 << FW_DOMAIN_ID_MEDIA_VDBOX0));
1582 BUILD_BUG_ON(FORCEWAKE_MEDIA_VDBOX1 != (1 << FW_DOMAIN_ID_MEDIA_VDBOX1));
1583 BUILD_BUG_ON(FORCEWAKE_MEDIA_VDBOX2 != (1 << FW_DOMAIN_ID_MEDIA_VDBOX2));
1584 BUILD_BUG_ON(FORCEWAKE_MEDIA_VDBOX3 != (1 << FW_DOMAIN_ID_MEDIA_VDBOX3));
1585 BUILD_BUG_ON(FORCEWAKE_MEDIA_VEBOX0 != (1 << FW_DOMAIN_ID_MEDIA_VEBOX0));
1586 BUILD_BUG_ON(FORCEWAKE_MEDIA_VEBOX1 != (1 << FW_DOMAIN_ID_MEDIA_VEBOX1));
1587
1588 d->mask = BIT(domain_id);
1589
1590 hrtimer_init(&d->timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
1591 d->timer.function = intel_uncore_fw_release_timer;
1592
1593 uncore->fw_domains |= BIT(domain_id);
1594
1595 fw_domain_reset(d);
1596
1597 uncore->fw_domain[domain_id] = d;
1598
1599 return 0;
1600}
1601
1602static void fw_domain_fini(struct intel_uncore *uncore,
1603 enum forcewake_domain_id domain_id)
1604{
1605 struct intel_uncore_forcewake_domain *d;
1606
1607 GEM_BUG_ON(domain_id >= FW_DOMAIN_ID_COUNT);
1608
1609 d = fetch_and_zero(&uncore->fw_domain[domain_id]);
1610 if (!d)
1611 return;
1612
1613 uncore->fw_domains &= ~BIT(domain_id);
1614 drm_WARN_ON(&uncore->i915->drm, d->wake_count);
1615 drm_WARN_ON(&uncore->i915->drm, hrtimer_cancel(&d->timer));
1616 kfree(d);
1617}
1618
1619static void intel_uncore_fw_domains_fini(struct intel_uncore *uncore)
1620{
1621 struct intel_uncore_forcewake_domain *d;
1622 int tmp;
1623
1624 for_each_fw_domain(d, uncore, tmp)
1625 fw_domain_fini(uncore, d->id);
1626}
1627
1628static int intel_uncore_fw_domains_init(struct intel_uncore *uncore)
1629{
1630 struct drm_i915_private *i915 = uncore->i915;
1631 int ret = 0;
1632
1633 GEM_BUG_ON(!intel_uncore_has_forcewake(uncore));
1634
1635#define fw_domain_init(uncore__, id__, set__, ack__) \
1636 (ret ?: (ret = __fw_domain_init((uncore__), (id__), (set__), (ack__))))
1637
1638 if (GRAPHICS_VER(i915) >= 11) {
1639 /* we'll prune the domains of missing engines later */
1640 intel_engine_mask_t emask = INTEL_INFO(i915)->platform_engine_mask;
1641 int i;
1642
1643 uncore->funcs.force_wake_get = fw_domains_get_with_fallback;
1644 uncore->funcs.force_wake_put = fw_domains_put;
1645 fw_domain_init(uncore, FW_DOMAIN_ID_RENDER,
1646 FORCEWAKE_RENDER_GEN9,
1647 FORCEWAKE_ACK_RENDER_GEN9);
1648 fw_domain_init(uncore, FW_DOMAIN_ID_GT,
1649 FORCEWAKE_GT_GEN9,
1650 FORCEWAKE_ACK_GT_GEN9);
1651
1652 for (i = 0; i < I915_MAX_VCS; i++) {
1653 if (!__HAS_ENGINE(emask, _VCS(i)))
1654 continue;
1655
1656 fw_domain_init(uncore, FW_DOMAIN_ID_MEDIA_VDBOX0 + i,
1657 FORCEWAKE_MEDIA_VDBOX_GEN11(i),
1658 FORCEWAKE_ACK_MEDIA_VDBOX_GEN11(i));
1659 }
1660 for (i = 0; i < I915_MAX_VECS; i++) {
1661 if (!__HAS_ENGINE(emask, _VECS(i)))
1662 continue;
1663
1664 fw_domain_init(uncore, FW_DOMAIN_ID_MEDIA_VEBOX0 + i,
1665 FORCEWAKE_MEDIA_VEBOX_GEN11(i),
1666 FORCEWAKE_ACK_MEDIA_VEBOX_GEN11(i));
1667 }
1668 } else if (IS_GRAPHICS_VER(i915, 9, 10)) {
1669 uncore->funcs.force_wake_get = fw_domains_get_with_fallback;
1670 uncore->funcs.force_wake_put = fw_domains_put;
1671 fw_domain_init(uncore, FW_DOMAIN_ID_RENDER,
1672 FORCEWAKE_RENDER_GEN9,
1673 FORCEWAKE_ACK_RENDER_GEN9);
1674 fw_domain_init(uncore, FW_DOMAIN_ID_GT,
1675 FORCEWAKE_GT_GEN9,
1676 FORCEWAKE_ACK_GT_GEN9);
1677 fw_domain_init(uncore, FW_DOMAIN_ID_MEDIA,
1678 FORCEWAKE_MEDIA_GEN9, FORCEWAKE_ACK_MEDIA_GEN9);
1679 } else if (IS_VALLEYVIEW(i915) || IS_CHERRYVIEW(i915)) {
1680 uncore->funcs.force_wake_get = fw_domains_get;
1681 uncore->funcs.force_wake_put = fw_domains_put;
1682 fw_domain_init(uncore, FW_DOMAIN_ID_RENDER,
1683 FORCEWAKE_VLV, FORCEWAKE_ACK_VLV);
1684 fw_domain_init(uncore, FW_DOMAIN_ID_MEDIA,
1685 FORCEWAKE_MEDIA_VLV, FORCEWAKE_ACK_MEDIA_VLV);
1686 } else if (IS_HASWELL(i915) || IS_BROADWELL(i915)) {
1687 uncore->funcs.force_wake_get =
1688 fw_domains_get_with_thread_status;
1689 uncore->funcs.force_wake_put = fw_domains_put;
1690 fw_domain_init(uncore, FW_DOMAIN_ID_RENDER,
1691 FORCEWAKE_MT, FORCEWAKE_ACK_HSW);
1692 } else if (IS_IVYBRIDGE(i915)) {
1693 u32 ecobus;
1694
1695 /* IVB configs may use multi-threaded forcewake */
1696
1697 /* A small trick here - if the bios hasn't configured
1698 * MT forcewake, and if the device is in RC6, then
1699 * force_wake_mt_get will not wake the device and the
1700 * ECOBUS read will return zero. Which will be
1701 * (correctly) interpreted by the test below as MT
1702 * forcewake being disabled.
1703 */
1704 uncore->funcs.force_wake_get =
1705 fw_domains_get_with_thread_status;
1706 uncore->funcs.force_wake_put = fw_domains_put;
1707
1708 /* We need to init first for ECOBUS access and then
1709 * determine later if we want to reinit, in case of MT access is
1710 * not working. In this stage we don't know which flavour this
1711 * ivb is, so it is better to reset also the gen6 fw registers
1712 * before the ecobus check.
1713 */
1714
1715 __raw_uncore_write32(uncore, FORCEWAKE, 0);
1716 __raw_posting_read(uncore, ECOBUS);
1717
1718 ret = __fw_domain_init(uncore, FW_DOMAIN_ID_RENDER,
1719 FORCEWAKE_MT, FORCEWAKE_MT_ACK);
1720 if (ret)
1721 goto out;
1722
1723 spin_lock_irq(&uncore->lock);
1724 fw_domains_get_with_thread_status(uncore, FORCEWAKE_RENDER);
1725 ecobus = __raw_uncore_read32(uncore, ECOBUS);
1726 fw_domains_put(uncore, FORCEWAKE_RENDER);
1727 spin_unlock_irq(&uncore->lock);
1728
1729 if (!(ecobus & FORCEWAKE_MT_ENABLE)) {
1730 drm_info(&i915->drm, "No MT forcewake available on Ivybridge, this can result in issues\n");
1731 drm_info(&i915->drm, "when using vblank-synced partial screen updates.\n");
1732 fw_domain_fini(uncore, FW_DOMAIN_ID_RENDER);
1733 fw_domain_init(uncore, FW_DOMAIN_ID_RENDER,
1734 FORCEWAKE, FORCEWAKE_ACK);
1735 }
1736 } else if (GRAPHICS_VER(i915) == 6) {
1737 uncore->funcs.force_wake_get =
1738 fw_domains_get_with_thread_status;
1739 uncore->funcs.force_wake_put = fw_domains_put;
1740 fw_domain_init(uncore, FW_DOMAIN_ID_RENDER,
1741 FORCEWAKE, FORCEWAKE_ACK);
1742 }
1743
1744#undef fw_domain_init
1745
1746 /* All future platforms are expected to require complex power gating */
1747 drm_WARN_ON(&i915->drm, !ret && uncore->fw_domains == 0);
1748
1749out:
1750 if (ret)
1751 intel_uncore_fw_domains_fini(uncore);
1752
1753 return ret;
1754}
1755
1756#define ASSIGN_FW_DOMAINS_TABLE(uncore, d) \
1757{ \
1758 (uncore)->fw_domains_table = \
1759 (struct intel_forcewake_range *)(d); \
1760 (uncore)->fw_domains_table_entries = ARRAY_SIZE((d)); \
1761}
1762
1763static int i915_pmic_bus_access_notifier(struct notifier_block *nb,
1764 unsigned long action, void *data)
1765{
1766 struct intel_uncore *uncore = container_of(nb,
1767 struct intel_uncore, pmic_bus_access_nb);
1768
1769 switch (action) {
1770 case MBI_PMIC_BUS_ACCESS_BEGIN:
1771 /*
1772 * forcewake all now to make sure that we don't need to do a
1773 * forcewake later which on systems where this notifier gets
1774 * called requires the punit to access to the shared pmic i2c
1775 * bus, which will be busy after this notification, leading to:
1776 * "render: timed out waiting for forcewake ack request."
1777 * errors.
1778 *
1779 * The notifier is unregistered during intel_runtime_suspend(),
1780 * so it's ok to access the HW here without holding a RPM
1781 * wake reference -> disable wakeref asserts for the time of
1782 * the access.
1783 */
1784 disable_rpm_wakeref_asserts(uncore->rpm);
1785 intel_uncore_forcewake_get(uncore, FORCEWAKE_ALL);
1786 enable_rpm_wakeref_asserts(uncore->rpm);
1787 break;
1788 case MBI_PMIC_BUS_ACCESS_END:
1789 intel_uncore_forcewake_put(uncore, FORCEWAKE_ALL);
1790 break;
1791 }
1792
1793 return NOTIFY_OK;
1794}
1795
1796static int uncore_mmio_setup(struct intel_uncore *uncore)
1797{
1798 struct drm_i915_private *i915 = uncore->i915;
1799 struct pci_dev *pdev = to_pci_dev(i915->drm.dev);
1800 int mmio_bar;
1801 int mmio_size;
1802
1803 mmio_bar = GRAPHICS_VER(i915) == 2 ? 1 : 0;
1804 /*
1805 * Before gen4, the registers and the GTT are behind different BARs.
1806 * However, from gen4 onwards, the registers and the GTT are shared
1807 * in the same BAR, so we want to restrict this ioremap from
1808 * clobbering the GTT which we want ioremap_wc instead. Fortunately,
1809 * the register BAR remains the same size for all the earlier
1810 * generations up to Ironlake.
1811 * For dgfx chips register range is expanded to 4MB.
1812 */
1813 if (GRAPHICS_VER(i915) < 5)
1814 mmio_size = 512 * 1024;
1815 else if (IS_DGFX(i915))
1816 mmio_size = 4 * 1024 * 1024;
1817 else
1818 mmio_size = 2 * 1024 * 1024;
1819
1820 uncore->regs = pci_iomap(pdev, mmio_bar, mmio_size);
1821 if (uncore->regs == NULL) {
1822 drm_err(&i915->drm, "failed to map registers\n");
1823 return -EIO;
1824 }
1825
1826 return 0;
1827}
1828
1829static void uncore_mmio_cleanup(struct intel_uncore *uncore)
1830{
1831 struct pci_dev *pdev = to_pci_dev(uncore->i915->drm.dev);
1832
1833 pci_iounmap(pdev, uncore->regs);
1834}
1835
1836void intel_uncore_init_early(struct intel_uncore *uncore,
1837 struct drm_i915_private *i915)
1838{
1839 spin_lock_init(&uncore->lock);
1840 uncore->i915 = i915;
1841 uncore->rpm = &i915->runtime_pm;
1842 uncore->debug = &i915->mmio_debug;
1843}
1844
1845static void uncore_raw_init(struct intel_uncore *uncore)
1846{
1847 GEM_BUG_ON(intel_uncore_has_forcewake(uncore));
1848
1849 if (intel_vgpu_active(uncore->i915)) {
1850 ASSIGN_RAW_WRITE_MMIO_VFUNCS(uncore, vgpu);
1851 ASSIGN_RAW_READ_MMIO_VFUNCS(uncore, vgpu);
1852 } else if (GRAPHICS_VER(uncore->i915) == 5) {
1853 ASSIGN_RAW_WRITE_MMIO_VFUNCS(uncore, gen5);
1854 ASSIGN_RAW_READ_MMIO_VFUNCS(uncore, gen5);
1855 } else {
1856 ASSIGN_RAW_WRITE_MMIO_VFUNCS(uncore, gen2);
1857 ASSIGN_RAW_READ_MMIO_VFUNCS(uncore, gen2);
1858 }
1859}
1860
1861static int uncore_forcewake_init(struct intel_uncore *uncore)
1862{
1863 struct drm_i915_private *i915 = uncore->i915;
1864 int ret;
1865
1866 GEM_BUG_ON(!intel_uncore_has_forcewake(uncore));
1867
1868 ret = intel_uncore_fw_domains_init(uncore);
1869 if (ret)
1870 return ret;
1871 forcewake_early_sanitize(uncore, 0);
1872
1873 if (IS_GRAPHICS_VER(i915, 6, 7)) {
1874 ASSIGN_WRITE_MMIO_VFUNCS(uncore, gen6);
1875
1876 if (IS_VALLEYVIEW(i915)) {
1877 ASSIGN_FW_DOMAINS_TABLE(uncore, __vlv_fw_ranges);
1878 ASSIGN_READ_MMIO_VFUNCS(uncore, fwtable);
1879 } else {
1880 ASSIGN_READ_MMIO_VFUNCS(uncore, gen6);
1881 }
1882 } else if (GRAPHICS_VER(i915) == 8) {
1883 if (IS_CHERRYVIEW(i915)) {
1884 ASSIGN_FW_DOMAINS_TABLE(uncore, __chv_fw_ranges);
1885 ASSIGN_WRITE_MMIO_VFUNCS(uncore, fwtable);
1886 ASSIGN_READ_MMIO_VFUNCS(uncore, fwtable);
1887 } else {
1888 ASSIGN_WRITE_MMIO_VFUNCS(uncore, gen8);
1889 ASSIGN_READ_MMIO_VFUNCS(uncore, gen6);
1890 }
1891 } else if (IS_GRAPHICS_VER(i915, 9, 10)) {
1892 ASSIGN_FW_DOMAINS_TABLE(uncore, __gen9_fw_ranges);
1893 ASSIGN_WRITE_MMIO_VFUNCS(uncore, fwtable);
1894 ASSIGN_READ_MMIO_VFUNCS(uncore, fwtable);
1895 } else if (GRAPHICS_VER(i915) == 11) {
1896 ASSIGN_FW_DOMAINS_TABLE(uncore, __gen11_fw_ranges);
1897 ASSIGN_WRITE_MMIO_VFUNCS(uncore, gen11_fwtable);
1898 ASSIGN_READ_MMIO_VFUNCS(uncore, gen11_fwtable);
1899 } else {
1900 ASSIGN_FW_DOMAINS_TABLE(uncore, __gen12_fw_ranges);
1901 ASSIGN_WRITE_MMIO_VFUNCS(uncore, gen12_fwtable);
1902 ASSIGN_READ_MMIO_VFUNCS(uncore, gen12_fwtable);
1903 }
1904
1905 uncore->pmic_bus_access_nb.notifier_call = i915_pmic_bus_access_notifier;
1906 iosf_mbi_register_pmic_bus_access_notifier(&uncore->pmic_bus_access_nb);
1907
1908 return 0;
1909}
1910
1911int intel_uncore_init_mmio(struct intel_uncore *uncore)
1912{
1913 struct drm_i915_private *i915 = uncore->i915;
1914 int ret;
1915
1916 ret = uncore_mmio_setup(uncore);
1917 if (ret)
1918 return ret;
1919
1920 /*
1921 * The boot firmware initializes local memory and assesses its health.
1922 * If memory training fails, the punit will have been instructed to
1923 * keep the GT powered down; we won't be able to communicate with it
1924 * and we should not continue with driver initialization.
1925 */
1926 if (IS_DGFX(i915) &&
1927 !(__raw_uncore_read32(uncore, GU_CNTL) & LMEM_INIT)) {
1928 drm_err(&i915->drm, "LMEM not initialized by firmware\n");
1929 return -ENODEV;
1930 }
1931
1932 if (INTEL_GEN(i915) > 5 && !intel_vgpu_active(i915))
1933 uncore->flags |= UNCORE_HAS_FORCEWAKE;
1934
1935 if (!intel_uncore_has_forcewake(uncore)) {
1936 uncore_raw_init(uncore);
1937 } else {
1938 ret = uncore_forcewake_init(uncore);
1939 if (ret)
1940 goto out_mmio_cleanup;
1941 }
1942
1943 /* make sure fw funcs are set if and only if we have fw*/
1944 GEM_BUG_ON(intel_uncore_has_forcewake(uncore) != !!uncore->funcs.force_wake_get);
1945 GEM_BUG_ON(intel_uncore_has_forcewake(uncore) != !!uncore->funcs.force_wake_put);
1946 GEM_BUG_ON(intel_uncore_has_forcewake(uncore) != !!uncore->funcs.read_fw_domains);
1947 GEM_BUG_ON(intel_uncore_has_forcewake(uncore) != !!uncore->funcs.write_fw_domains);
1948
1949 if (HAS_FPGA_DBG_UNCLAIMED(i915))
1950 uncore->flags |= UNCORE_HAS_FPGA_DBG_UNCLAIMED;
1951
1952 if (IS_VALLEYVIEW(i915) || IS_CHERRYVIEW(i915))
1953 uncore->flags |= UNCORE_HAS_DBG_UNCLAIMED;
1954
1955 if (IS_GRAPHICS_VER(i915, 6, 7))
1956 uncore->flags |= UNCORE_HAS_FIFO;
1957
1958 /* clear out unclaimed reg detection bit */
1959 if (intel_uncore_unclaimed_mmio(uncore))
1960 drm_dbg(&i915->drm, "unclaimed mmio detected on uncore init, clearing\n");
1961
1962 return 0;
1963
1964out_mmio_cleanup:
1965 uncore_mmio_cleanup(uncore);
1966
1967 return ret;
1968}
1969
1970/*
1971 * We might have detected that some engines are fused off after we initialized
1972 * the forcewake domains. Prune them, to make sure they only reference existing
1973 * engines.
1974 */
1975void intel_uncore_prune_engine_fw_domains(struct intel_uncore *uncore,
1976 struct intel_gt *gt)
1977{
1978 enum forcewake_domains fw_domains = uncore->fw_domains;
1979 enum forcewake_domain_id domain_id;
1980 int i;
1981
1982 if (!intel_uncore_has_forcewake(uncore) || GRAPHICS_VER(uncore->i915) < 11)
1983 return;
1984
1985 for (i = 0; i < I915_MAX_VCS; i++) {
1986 domain_id = FW_DOMAIN_ID_MEDIA_VDBOX0 + i;
1987
1988 if (HAS_ENGINE(gt, _VCS(i)))
1989 continue;
1990
1991 if (fw_domains & BIT(domain_id))
1992 fw_domain_fini(uncore, domain_id);
1993 }
1994
1995 for (i = 0; i < I915_MAX_VECS; i++) {
1996 domain_id = FW_DOMAIN_ID_MEDIA_VEBOX0 + i;
1997
1998 if (HAS_ENGINE(gt, _VECS(i)))
1999 continue;
2000
2001 if (fw_domains & BIT(domain_id))
2002 fw_domain_fini(uncore, domain_id);
2003 }
2004}
2005
2006void intel_uncore_fini_mmio(struct intel_uncore *uncore)
2007{
2008 if (intel_uncore_has_forcewake(uncore)) {
2009 iosf_mbi_punit_acquire();
2010 iosf_mbi_unregister_pmic_bus_access_notifier_unlocked(
2011 &uncore->pmic_bus_access_nb);
2012 intel_uncore_forcewake_reset(uncore);
2013 intel_uncore_fw_domains_fini(uncore);
2014 iosf_mbi_punit_release();
2015 }
2016
2017 uncore_mmio_cleanup(uncore);
2018}
2019
2020static const struct reg_whitelist {
2021 i915_reg_t offset_ldw;
2022 i915_reg_t offset_udw;
2023 u8 min_graphics_ver;
2024 u8 max_graphics_ver;
2025 u8 size;
2026} reg_read_whitelist[] = { {
2027 .offset_ldw = RING_TIMESTAMP(RENDER_RING_BASE),
2028 .offset_udw = RING_TIMESTAMP_UDW(RENDER_RING_BASE),
2029 .min_graphics_ver = 4,
2030 .max_graphics_ver = 12,
2031 .size = 8
2032} };
2033
2034int i915_reg_read_ioctl(struct drm_device *dev,
2035 void *data, struct drm_file *file)
2036{
2037 struct drm_i915_private *i915 = to_i915(dev);
2038 struct intel_uncore *uncore = &i915->uncore;
2039 struct drm_i915_reg_read *reg = data;
2040 struct reg_whitelist const *entry;
2041 intel_wakeref_t wakeref;
2042 unsigned int flags;
2043 int remain;
2044 int ret = 0;
2045
2046 entry = reg_read_whitelist;
2047 remain = ARRAY_SIZE(reg_read_whitelist);
2048 while (remain) {
2049 u32 entry_offset = i915_mmio_reg_offset(entry->offset_ldw);
2050
2051 GEM_BUG_ON(!is_power_of_2(entry->size));
2052 GEM_BUG_ON(entry->size > 8);
2053 GEM_BUG_ON(entry_offset & (entry->size - 1));
2054
2055 if (IS_GRAPHICS_VER(i915, entry->min_graphics_ver, entry->max_graphics_ver) &&
2056 entry_offset == (reg->offset & -entry->size))
2057 break;
2058 entry++;
2059 remain--;
2060 }
2061
2062 if (!remain)
2063 return -EINVAL;
2064
2065 flags = reg->offset & (entry->size - 1);
2066
2067 with_intel_runtime_pm(&i915->runtime_pm, wakeref) {
2068 if (entry->size == 8 && flags == I915_REG_READ_8B_WA)
2069 reg->val = intel_uncore_read64_2x32(uncore,
2070 entry->offset_ldw,
2071 entry->offset_udw);
2072 else if (entry->size == 8 && flags == 0)
2073 reg->val = intel_uncore_read64(uncore,
2074 entry->offset_ldw);
2075 else if (entry->size == 4 && flags == 0)
2076 reg->val = intel_uncore_read(uncore, entry->offset_ldw);
2077 else if (entry->size == 2 && flags == 0)
2078 reg->val = intel_uncore_read16(uncore,
2079 entry->offset_ldw);
2080 else if (entry->size == 1 && flags == 0)
2081 reg->val = intel_uncore_read8(uncore,
2082 entry->offset_ldw);
2083 else
2084 ret = -EINVAL;
2085 }
2086
2087 return ret;
2088}
2089
2090/**
2091 * __intel_wait_for_register_fw - wait until register matches expected state
2092 * @uncore: the struct intel_uncore
2093 * @reg: the register to read
2094 * @mask: mask to apply to register value
2095 * @value: expected value
2096 * @fast_timeout_us: fast timeout in microsecond for atomic/tight wait
2097 * @slow_timeout_ms: slow timeout in millisecond
2098 * @out_value: optional placeholder to hold registry value
2099 *
2100 * This routine waits until the target register @reg contains the expected
2101 * @value after applying the @mask, i.e. it waits until ::
2102 *
2103 * (intel_uncore_read_fw(uncore, reg) & mask) == value
2104 *
2105 * Otherwise, the wait will timeout after @slow_timeout_ms milliseconds.
2106 * For atomic context @slow_timeout_ms must be zero and @fast_timeout_us
2107 * must be not larger than 20,0000 microseconds.
2108 *
2109 * Note that this routine assumes the caller holds forcewake asserted, it is
2110 * not suitable for very long waits. See intel_wait_for_register() if you
2111 * wish to wait without holding forcewake for the duration (i.e. you expect
2112 * the wait to be slow).
2113 *
2114 * Return: 0 if the register matches the desired condition, or -ETIMEDOUT.
2115 */
2116int __intel_wait_for_register_fw(struct intel_uncore *uncore,
2117 i915_reg_t reg,
2118 u32 mask,
2119 u32 value,
2120 unsigned int fast_timeout_us,
2121 unsigned int slow_timeout_ms,
2122 u32 *out_value)
2123{
2124 u32 reg_value = 0;
2125#define done (((reg_value = intel_uncore_read_fw(uncore, reg)) & mask) == value)
2126 int ret;
2127
2128 /* Catch any overuse of this function */
2129 might_sleep_if(slow_timeout_ms);
2130 GEM_BUG_ON(fast_timeout_us > 20000);
2131 GEM_BUG_ON(!fast_timeout_us && !slow_timeout_ms);
2132
2133 ret = -ETIMEDOUT;
2134 if (fast_timeout_us && fast_timeout_us <= 20000)
2135 ret = _wait_for_atomic(done, fast_timeout_us, 0);
2136 if (ret && slow_timeout_ms)
2137 ret = wait_for(done, slow_timeout_ms);
2138
2139 if (out_value)
2140 *out_value = reg_value;
2141
2142 return ret;
2143#undef done
2144}
2145
2146/**
2147 * __intel_wait_for_register - wait until register matches expected state
2148 * @uncore: the struct intel_uncore
2149 * @reg: the register to read
2150 * @mask: mask to apply to register value
2151 * @value: expected value
2152 * @fast_timeout_us: fast timeout in microsecond for atomic/tight wait
2153 * @slow_timeout_ms: slow timeout in millisecond
2154 * @out_value: optional placeholder to hold registry value
2155 *
2156 * This routine waits until the target register @reg contains the expected
2157 * @value after applying the @mask, i.e. it waits until ::
2158 *
2159 * (intel_uncore_read(uncore, reg) & mask) == value
2160 *
2161 * Otherwise, the wait will timeout after @timeout_ms milliseconds.
2162 *
2163 * Return: 0 if the register matches the desired condition, or -ETIMEDOUT.
2164 */
2165int __intel_wait_for_register(struct intel_uncore *uncore,
2166 i915_reg_t reg,
2167 u32 mask,
2168 u32 value,
2169 unsigned int fast_timeout_us,
2170 unsigned int slow_timeout_ms,
2171 u32 *out_value)
2172{
2173 unsigned fw =
2174 intel_uncore_forcewake_for_reg(uncore, reg, FW_REG_READ);
2175 u32 reg_value;
2176 int ret;
2177
2178 might_sleep_if(slow_timeout_ms);
2179
2180 spin_lock_irq(&uncore->lock);
2181 intel_uncore_forcewake_get__locked(uncore, fw);
2182
2183 ret = __intel_wait_for_register_fw(uncore,
2184 reg, mask, value,
2185 fast_timeout_us, 0, ®_value);
2186
2187 intel_uncore_forcewake_put__locked(uncore, fw);
2188 spin_unlock_irq(&uncore->lock);
2189
2190 if (ret && slow_timeout_ms)
2191 ret = __wait_for(reg_value = intel_uncore_read_notrace(uncore,
2192 reg),
2193 (reg_value & mask) == value,
2194 slow_timeout_ms * 1000, 10, 1000);
2195
2196 /* just trace the final value */
2197 trace_i915_reg_rw(false, reg, reg_value, sizeof(reg_value), true);
2198
2199 if (out_value)
2200 *out_value = reg_value;
2201
2202 return ret;
2203}
2204
2205bool intel_uncore_unclaimed_mmio(struct intel_uncore *uncore)
2206{
2207 bool ret;
2208
2209 spin_lock_irq(&uncore->debug->lock);
2210 ret = check_for_unclaimed_mmio(uncore);
2211 spin_unlock_irq(&uncore->debug->lock);
2212
2213 return ret;
2214}
2215
2216bool
2217intel_uncore_arm_unclaimed_mmio_detection(struct intel_uncore *uncore)
2218{
2219 bool ret = false;
2220
2221 spin_lock_irq(&uncore->debug->lock);
2222
2223 if (unlikely(uncore->debug->unclaimed_mmio_check <= 0))
2224 goto out;
2225
2226 if (unlikely(check_for_unclaimed_mmio(uncore))) {
2227 if (!uncore->i915->params.mmio_debug) {
2228 drm_dbg(&uncore->i915->drm,
2229 "Unclaimed register detected, "
2230 "enabling oneshot unclaimed register reporting. "
2231 "Please use i915.mmio_debug=N for more information.\n");
2232 uncore->i915->params.mmio_debug++;
2233 }
2234 uncore->debug->unclaimed_mmio_check--;
2235 ret = true;
2236 }
2237
2238out:
2239 spin_unlock_irq(&uncore->debug->lock);
2240
2241 return ret;
2242}
2243
2244/**
2245 * intel_uncore_forcewake_for_reg - which forcewake domains are needed to access
2246 * a register
2247 * @uncore: pointer to struct intel_uncore
2248 * @reg: register in question
2249 * @op: operation bitmask of FW_REG_READ and/or FW_REG_WRITE
2250 *
2251 * Returns a set of forcewake domains required to be taken with for example
2252 * intel_uncore_forcewake_get for the specified register to be accessible in the
2253 * specified mode (read, write or read/write) with raw mmio accessors.
2254 *
2255 * NOTE: On Gen6 and Gen7 write forcewake domain (FORCEWAKE_RENDER) requires the
2256 * callers to do FIFO management on their own or risk losing writes.
2257 */
2258enum forcewake_domains
2259intel_uncore_forcewake_for_reg(struct intel_uncore *uncore,
2260 i915_reg_t reg, unsigned int op)
2261{
2262 enum forcewake_domains fw_domains = 0;
2263
2264 drm_WARN_ON(&uncore->i915->drm, !op);
2265
2266 if (!intel_uncore_has_forcewake(uncore))
2267 return 0;
2268
2269 if (op & FW_REG_READ)
2270 fw_domains = uncore->funcs.read_fw_domains(uncore, reg);
2271
2272 if (op & FW_REG_WRITE)
2273 fw_domains |= uncore->funcs.write_fw_domains(uncore, reg);
2274
2275 drm_WARN_ON(&uncore->i915->drm, fw_domains & ~uncore->fw_domains);
2276
2277 return fw_domains;
2278}
2279
2280#if IS_ENABLED(CONFIG_DRM_I915_SELFTEST)
2281#include "selftests/mock_uncore.c"
2282#include "selftests/intel_uncore.c"
2283#endif