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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 __raw_uncore_write32(uncore, FPGA_DBG, FPGA_DBG_RM_NOCLAIM);
469
470 return true;
471}
472
473static bool
474vlv_check_for_unclaimed_mmio(struct intel_uncore *uncore)
475{
476 u32 cer;
477
478 cer = __raw_uncore_read32(uncore, CLAIM_ER);
479 if (likely(!(cer & (CLAIM_ER_OVERFLOW | CLAIM_ER_CTR_MASK))))
480 return false;
481
482 __raw_uncore_write32(uncore, CLAIM_ER, CLAIM_ER_CLR);
483
484 return true;
485}
486
487static bool
488gen6_check_for_fifo_debug(struct intel_uncore *uncore)
489{
490 u32 fifodbg;
491
492 fifodbg = __raw_uncore_read32(uncore, GTFIFODBG);
493
494 if (unlikely(fifodbg)) {
495 drm_dbg(&uncore->i915->drm, "GTFIFODBG = 0x08%x\n", fifodbg);
496 __raw_uncore_write32(uncore, GTFIFODBG, fifodbg);
497 }
498
499 return fifodbg;
500}
501
502static bool
503check_for_unclaimed_mmio(struct intel_uncore *uncore)
504{
505 bool ret = false;
506
507 lockdep_assert_held(&uncore->debug->lock);
508
509 if (uncore->debug->suspend_count)
510 return false;
511
512 if (intel_uncore_has_fpga_dbg_unclaimed(uncore))
513 ret |= fpga_check_for_unclaimed_mmio(uncore);
514
515 if (intel_uncore_has_dbg_unclaimed(uncore))
516 ret |= vlv_check_for_unclaimed_mmio(uncore);
517
518 if (intel_uncore_has_fifo(uncore))
519 ret |= gen6_check_for_fifo_debug(uncore);
520
521 return ret;
522}
523
524static void forcewake_early_sanitize(struct intel_uncore *uncore,
525 unsigned int restore_forcewake)
526{
527 GEM_BUG_ON(!intel_uncore_has_forcewake(uncore));
528
529 /* WaDisableShadowRegForCpd:chv */
530 if (IS_CHERRYVIEW(uncore->i915)) {
531 __raw_uncore_write32(uncore, GTFIFOCTL,
532 __raw_uncore_read32(uncore, GTFIFOCTL) |
533 GT_FIFO_CTL_BLOCK_ALL_POLICY_STALL |
534 GT_FIFO_CTL_RC6_POLICY_STALL);
535 }
536
537 iosf_mbi_punit_acquire();
538 intel_uncore_forcewake_reset(uncore);
539 if (restore_forcewake) {
540 spin_lock_irq(&uncore->lock);
541 uncore->funcs.force_wake_get(uncore, restore_forcewake);
542
543 if (intel_uncore_has_fifo(uncore))
544 uncore->fifo_count = fifo_free_entries(uncore);
545 spin_unlock_irq(&uncore->lock);
546 }
547 iosf_mbi_punit_release();
548}
549
550void intel_uncore_suspend(struct intel_uncore *uncore)
551{
552 if (!intel_uncore_has_forcewake(uncore))
553 return;
554
555 iosf_mbi_punit_acquire();
556 iosf_mbi_unregister_pmic_bus_access_notifier_unlocked(
557 &uncore->pmic_bus_access_nb);
558 uncore->fw_domains_saved = intel_uncore_forcewake_reset(uncore);
559 iosf_mbi_punit_release();
560}
561
562void intel_uncore_resume_early(struct intel_uncore *uncore)
563{
564 unsigned int restore_forcewake;
565
566 if (intel_uncore_unclaimed_mmio(uncore))
567 drm_dbg(&uncore->i915->drm, "unclaimed mmio detected on resume, clearing\n");
568
569 if (!intel_uncore_has_forcewake(uncore))
570 return;
571
572 restore_forcewake = fetch_and_zero(&uncore->fw_domains_saved);
573 forcewake_early_sanitize(uncore, restore_forcewake);
574
575 iosf_mbi_register_pmic_bus_access_notifier(&uncore->pmic_bus_access_nb);
576}
577
578void intel_uncore_runtime_resume(struct intel_uncore *uncore)
579{
580 if (!intel_uncore_has_forcewake(uncore))
581 return;
582
583 iosf_mbi_register_pmic_bus_access_notifier(&uncore->pmic_bus_access_nb);
584}
585
586static void __intel_uncore_forcewake_get(struct intel_uncore *uncore,
587 enum forcewake_domains fw_domains)
588{
589 struct intel_uncore_forcewake_domain *domain;
590 unsigned int tmp;
591
592 fw_domains &= uncore->fw_domains;
593
594 for_each_fw_domain_masked(domain, fw_domains, uncore, tmp) {
595 if (domain->wake_count++) {
596 fw_domains &= ~domain->mask;
597 domain->active = true;
598 }
599 }
600
601 if (fw_domains)
602 uncore->funcs.force_wake_get(uncore, fw_domains);
603}
604
605/**
606 * intel_uncore_forcewake_get - grab forcewake domain references
607 * @uncore: the intel_uncore structure
608 * @fw_domains: forcewake domains to get reference on
609 *
610 * This function can be used get GT's forcewake domain references.
611 * Normal register access will handle the forcewake domains automatically.
612 * However if some sequence requires the GT to not power down a particular
613 * forcewake domains this function should be called at the beginning of the
614 * sequence. And subsequently the reference should be dropped by symmetric
615 * call to intel_unforce_forcewake_put(). Usually caller wants all the domains
616 * to be kept awake so the @fw_domains would be then FORCEWAKE_ALL.
617 */
618void intel_uncore_forcewake_get(struct intel_uncore *uncore,
619 enum forcewake_domains fw_domains)
620{
621 unsigned long irqflags;
622
623 if (!uncore->funcs.force_wake_get)
624 return;
625
626 assert_rpm_wakelock_held(uncore->rpm);
627
628 spin_lock_irqsave(&uncore->lock, irqflags);
629 __intel_uncore_forcewake_get(uncore, fw_domains);
630 spin_unlock_irqrestore(&uncore->lock, irqflags);
631}
632
633/**
634 * intel_uncore_forcewake_user_get - claim forcewake on behalf of userspace
635 * @uncore: the intel_uncore structure
636 *
637 * This function is a wrapper around intel_uncore_forcewake_get() to acquire
638 * the GT powerwell and in the process disable our debugging for the
639 * duration of userspace's bypass.
640 */
641void intel_uncore_forcewake_user_get(struct intel_uncore *uncore)
642{
643 spin_lock_irq(&uncore->lock);
644 if (!uncore->user_forcewake_count++) {
645 intel_uncore_forcewake_get__locked(uncore, FORCEWAKE_ALL);
646 spin_lock(&uncore->debug->lock);
647 mmio_debug_suspend(uncore->debug);
648 spin_unlock(&uncore->debug->lock);
649 }
650 spin_unlock_irq(&uncore->lock);
651}
652
653/**
654 * intel_uncore_forcewake_user_put - release forcewake on behalf of userspace
655 * @uncore: the intel_uncore structure
656 *
657 * This function complements intel_uncore_forcewake_user_get() and releases
658 * the GT powerwell taken on behalf of the userspace bypass.
659 */
660void intel_uncore_forcewake_user_put(struct intel_uncore *uncore)
661{
662 spin_lock_irq(&uncore->lock);
663 if (!--uncore->user_forcewake_count) {
664 spin_lock(&uncore->debug->lock);
665 mmio_debug_resume(uncore->debug);
666
667 if (check_for_unclaimed_mmio(uncore))
668 drm_info(&uncore->i915->drm,
669 "Invalid mmio detected during user access\n");
670 spin_unlock(&uncore->debug->lock);
671
672 intel_uncore_forcewake_put__locked(uncore, FORCEWAKE_ALL);
673 }
674 spin_unlock_irq(&uncore->lock);
675}
676
677/**
678 * intel_uncore_forcewake_get__locked - grab forcewake domain references
679 * @uncore: the intel_uncore structure
680 * @fw_domains: forcewake domains to get reference on
681 *
682 * See intel_uncore_forcewake_get(). This variant places the onus
683 * on the caller to explicitly handle the dev_priv->uncore.lock spinlock.
684 */
685void intel_uncore_forcewake_get__locked(struct intel_uncore *uncore,
686 enum forcewake_domains fw_domains)
687{
688 lockdep_assert_held(&uncore->lock);
689
690 if (!uncore->funcs.force_wake_get)
691 return;
692
693 __intel_uncore_forcewake_get(uncore, fw_domains);
694}
695
696static void __intel_uncore_forcewake_put(struct intel_uncore *uncore,
697 enum forcewake_domains fw_domains)
698{
699 struct intel_uncore_forcewake_domain *domain;
700 unsigned int tmp;
701
702 fw_domains &= uncore->fw_domains;
703
704 for_each_fw_domain_masked(domain, fw_domains, uncore, tmp) {
705 GEM_BUG_ON(!domain->wake_count);
706
707 if (--domain->wake_count) {
708 domain->active = true;
709 continue;
710 }
711
712 uncore->funcs.force_wake_put(uncore, domain->mask);
713 }
714}
715
716/**
717 * intel_uncore_forcewake_put - release a forcewake domain reference
718 * @uncore: the intel_uncore structure
719 * @fw_domains: forcewake domains to put references
720 *
721 * This function drops the device-level forcewakes for specified
722 * domains obtained by intel_uncore_forcewake_get().
723 */
724void intel_uncore_forcewake_put(struct intel_uncore *uncore,
725 enum forcewake_domains fw_domains)
726{
727 unsigned long irqflags;
728
729 if (!uncore->funcs.force_wake_put)
730 return;
731
732 spin_lock_irqsave(&uncore->lock, irqflags);
733 __intel_uncore_forcewake_put(uncore, fw_domains);
734 spin_unlock_irqrestore(&uncore->lock, irqflags);
735}
736
737/**
738 * intel_uncore_forcewake_flush - flush the delayed release
739 * @uncore: the intel_uncore structure
740 * @fw_domains: forcewake domains to flush
741 */
742void intel_uncore_forcewake_flush(struct intel_uncore *uncore,
743 enum forcewake_domains fw_domains)
744{
745 struct intel_uncore_forcewake_domain *domain;
746 unsigned int tmp;
747
748 if (!uncore->funcs.force_wake_put)
749 return;
750
751 fw_domains &= uncore->fw_domains;
752 for_each_fw_domain_masked(domain, fw_domains, uncore, tmp) {
753 WRITE_ONCE(domain->active, false);
754 if (hrtimer_cancel(&domain->timer))
755 intel_uncore_fw_release_timer(&domain->timer);
756 }
757}
758
759/**
760 * intel_uncore_forcewake_put__locked - grab forcewake domain references
761 * @uncore: the intel_uncore structure
762 * @fw_domains: forcewake domains to get reference on
763 *
764 * See intel_uncore_forcewake_put(). This variant places the onus
765 * on the caller to explicitly handle the dev_priv->uncore.lock spinlock.
766 */
767void intel_uncore_forcewake_put__locked(struct intel_uncore *uncore,
768 enum forcewake_domains fw_domains)
769{
770 lockdep_assert_held(&uncore->lock);
771
772 if (!uncore->funcs.force_wake_put)
773 return;
774
775 __intel_uncore_forcewake_put(uncore, fw_domains);
776}
777
778void assert_forcewakes_inactive(struct intel_uncore *uncore)
779{
780 if (!uncore->funcs.force_wake_get)
781 return;
782
783 drm_WARN(&uncore->i915->drm, uncore->fw_domains_active,
784 "Expected all fw_domains to be inactive, but %08x are still on\n",
785 uncore->fw_domains_active);
786}
787
788void assert_forcewakes_active(struct intel_uncore *uncore,
789 enum forcewake_domains fw_domains)
790{
791 struct intel_uncore_forcewake_domain *domain;
792 unsigned int tmp;
793
794 if (!IS_ENABLED(CONFIG_DRM_I915_DEBUG_RUNTIME_PM))
795 return;
796
797 if (!uncore->funcs.force_wake_get)
798 return;
799
800 spin_lock_irq(&uncore->lock);
801
802 assert_rpm_wakelock_held(uncore->rpm);
803
804 fw_domains &= uncore->fw_domains;
805 drm_WARN(&uncore->i915->drm, fw_domains & ~uncore->fw_domains_active,
806 "Expected %08x fw_domains to be active, but %08x are off\n",
807 fw_domains, fw_domains & ~uncore->fw_domains_active);
808
809 /*
810 * Check that the caller has an explicit wakeref and we don't mistake
811 * it for the auto wakeref.
812 */
813 for_each_fw_domain_masked(domain, fw_domains, uncore, tmp) {
814 unsigned int actual = READ_ONCE(domain->wake_count);
815 unsigned int expect = 1;
816
817 if (uncore->fw_domains_timer & domain->mask)
818 expect++; /* pending automatic release */
819
820 if (drm_WARN(&uncore->i915->drm, actual < expect,
821 "Expected domain %d to be held awake by caller, count=%d\n",
822 domain->id, actual))
823 break;
824 }
825
826 spin_unlock_irq(&uncore->lock);
827}
828
829/* We give fast paths for the really cool registers */
830#define NEEDS_FORCE_WAKE(reg) ((reg) < 0x40000)
831
832#define __gen6_reg_read_fw_domains(uncore, offset) \
833({ \
834 enum forcewake_domains __fwd; \
835 if (NEEDS_FORCE_WAKE(offset)) \
836 __fwd = FORCEWAKE_RENDER; \
837 else \
838 __fwd = 0; \
839 __fwd; \
840})
841
842static int fw_range_cmp(u32 offset, const struct intel_forcewake_range *entry)
843{
844 if (offset < entry->start)
845 return -1;
846 else if (offset > entry->end)
847 return 1;
848 else
849 return 0;
850}
851
852/* Copied and "macroized" from lib/bsearch.c */
853#define BSEARCH(key, base, num, cmp) ({ \
854 unsigned int start__ = 0, end__ = (num); \
855 typeof(base) result__ = NULL; \
856 while (start__ < end__) { \
857 unsigned int mid__ = start__ + (end__ - start__) / 2; \
858 int ret__ = (cmp)((key), (base) + mid__); \
859 if (ret__ < 0) { \
860 end__ = mid__; \
861 } else if (ret__ > 0) { \
862 start__ = mid__ + 1; \
863 } else { \
864 result__ = (base) + mid__; \
865 break; \
866 } \
867 } \
868 result__; \
869})
870
871static enum forcewake_domains
872find_fw_domain(struct intel_uncore *uncore, u32 offset)
873{
874 const struct intel_forcewake_range *entry;
875
876 entry = BSEARCH(offset,
877 uncore->fw_domains_table,
878 uncore->fw_domains_table_entries,
879 fw_range_cmp);
880
881 if (!entry)
882 return 0;
883
884 /*
885 * The list of FW domains depends on the SKU in gen11+ so we
886 * can't determine it statically. We use FORCEWAKE_ALL and
887 * translate it here to the list of available domains.
888 */
889 if (entry->domains == FORCEWAKE_ALL)
890 return uncore->fw_domains;
891
892 drm_WARN(&uncore->i915->drm, entry->domains & ~uncore->fw_domains,
893 "Uninitialized forcewake domain(s) 0x%x accessed at 0x%x\n",
894 entry->domains & ~uncore->fw_domains, offset);
895
896 return entry->domains;
897}
898
899#define GEN_FW_RANGE(s, e, d) \
900 { .start = (s), .end = (e), .domains = (d) }
901
902/* *Must* be sorted by offset ranges! See intel_fw_table_check(). */
903static const struct intel_forcewake_range __vlv_fw_ranges[] = {
904 GEN_FW_RANGE(0x2000, 0x3fff, FORCEWAKE_RENDER),
905 GEN_FW_RANGE(0x5000, 0x7fff, FORCEWAKE_RENDER),
906 GEN_FW_RANGE(0xb000, 0x11fff, FORCEWAKE_RENDER),
907 GEN_FW_RANGE(0x12000, 0x13fff, FORCEWAKE_MEDIA),
908 GEN_FW_RANGE(0x22000, 0x23fff, FORCEWAKE_MEDIA),
909 GEN_FW_RANGE(0x2e000, 0x2ffff, FORCEWAKE_RENDER),
910 GEN_FW_RANGE(0x30000, 0x3ffff, FORCEWAKE_MEDIA),
911};
912
913#define __fwtable_reg_read_fw_domains(uncore, offset) \
914({ \
915 enum forcewake_domains __fwd = 0; \
916 if (NEEDS_FORCE_WAKE((offset))) \
917 __fwd = find_fw_domain(uncore, offset); \
918 __fwd; \
919})
920
921#define __gen11_fwtable_reg_read_fw_domains(uncore, offset) \
922 find_fw_domain(uncore, offset)
923
924#define __gen12_fwtable_reg_read_fw_domains(uncore, offset) \
925 find_fw_domain(uncore, offset)
926
927/* *Must* be sorted by offset! See intel_shadow_table_check(). */
928static const i915_reg_t gen8_shadowed_regs[] = {
929 RING_TAIL(RENDER_RING_BASE), /* 0x2000 (base) */
930 GEN6_RPNSWREQ, /* 0xA008 */
931 GEN6_RC_VIDEO_FREQ, /* 0xA00C */
932 RING_TAIL(GEN6_BSD_RING_BASE), /* 0x12000 (base) */
933 RING_TAIL(VEBOX_RING_BASE), /* 0x1a000 (base) */
934 RING_TAIL(BLT_RING_BASE), /* 0x22000 (base) */
935 /* TODO: Other registers are not yet used */
936};
937
938static const i915_reg_t gen11_shadowed_regs[] = {
939 RING_TAIL(RENDER_RING_BASE), /* 0x2000 (base) */
940 GEN6_RPNSWREQ, /* 0xA008 */
941 GEN6_RC_VIDEO_FREQ, /* 0xA00C */
942 RING_TAIL(BLT_RING_BASE), /* 0x22000 (base) */
943 RING_TAIL(GEN11_BSD_RING_BASE), /* 0x1C0000 (base) */
944 RING_TAIL(GEN11_BSD2_RING_BASE), /* 0x1C4000 (base) */
945 RING_TAIL(GEN11_VEBOX_RING_BASE), /* 0x1C8000 (base) */
946 RING_TAIL(GEN11_BSD3_RING_BASE), /* 0x1D0000 (base) */
947 RING_TAIL(GEN11_BSD4_RING_BASE), /* 0x1D4000 (base) */
948 RING_TAIL(GEN11_VEBOX2_RING_BASE), /* 0x1D8000 (base) */
949 /* TODO: Other registers are not yet used */
950};
951
952static const i915_reg_t gen12_shadowed_regs[] = {
953 RING_TAIL(RENDER_RING_BASE), /* 0x2000 (base) */
954 GEN6_RPNSWREQ, /* 0xA008 */
955 GEN6_RC_VIDEO_FREQ, /* 0xA00C */
956 RING_TAIL(BLT_RING_BASE), /* 0x22000 (base) */
957 RING_TAIL(GEN11_BSD_RING_BASE), /* 0x1C0000 (base) */
958 RING_TAIL(GEN11_BSD2_RING_BASE), /* 0x1C4000 (base) */
959 RING_TAIL(GEN11_VEBOX_RING_BASE), /* 0x1C8000 (base) */
960 RING_TAIL(GEN11_BSD3_RING_BASE), /* 0x1D0000 (base) */
961 RING_TAIL(GEN11_BSD4_RING_BASE), /* 0x1D4000 (base) */
962 RING_TAIL(GEN11_VEBOX2_RING_BASE), /* 0x1D8000 (base) */
963 /* TODO: Other registers are not yet used */
964};
965
966static int mmio_reg_cmp(u32 key, const i915_reg_t *reg)
967{
968 u32 offset = i915_mmio_reg_offset(*reg);
969
970 if (key < offset)
971 return -1;
972 else if (key > offset)
973 return 1;
974 else
975 return 0;
976}
977
978#define __is_genX_shadowed(x) \
979static bool is_gen##x##_shadowed(u32 offset) \
980{ \
981 const i915_reg_t *regs = gen##x##_shadowed_regs; \
982 return BSEARCH(offset, regs, ARRAY_SIZE(gen##x##_shadowed_regs), \
983 mmio_reg_cmp); \
984}
985
986__is_genX_shadowed(8)
987__is_genX_shadowed(11)
988__is_genX_shadowed(12)
989
990static enum forcewake_domains
991gen6_reg_write_fw_domains(struct intel_uncore *uncore, i915_reg_t reg)
992{
993 return FORCEWAKE_RENDER;
994}
995
996#define __gen8_reg_write_fw_domains(uncore, offset) \
997({ \
998 enum forcewake_domains __fwd; \
999 if (NEEDS_FORCE_WAKE(offset) && !is_gen8_shadowed(offset)) \
1000 __fwd = FORCEWAKE_RENDER; \
1001 else \
1002 __fwd = 0; \
1003 __fwd; \
1004})
1005
1006/* *Must* be sorted by offset ranges! See intel_fw_table_check(). */
1007static const struct intel_forcewake_range __chv_fw_ranges[] = {
1008 GEN_FW_RANGE(0x2000, 0x3fff, FORCEWAKE_RENDER),
1009 GEN_FW_RANGE(0x4000, 0x4fff, FORCEWAKE_RENDER | FORCEWAKE_MEDIA),
1010 GEN_FW_RANGE(0x5200, 0x7fff, FORCEWAKE_RENDER),
1011 GEN_FW_RANGE(0x8000, 0x82ff, FORCEWAKE_RENDER | FORCEWAKE_MEDIA),
1012 GEN_FW_RANGE(0x8300, 0x84ff, FORCEWAKE_RENDER),
1013 GEN_FW_RANGE(0x8500, 0x85ff, FORCEWAKE_RENDER | FORCEWAKE_MEDIA),
1014 GEN_FW_RANGE(0x8800, 0x88ff, FORCEWAKE_MEDIA),
1015 GEN_FW_RANGE(0x9000, 0xafff, FORCEWAKE_RENDER | FORCEWAKE_MEDIA),
1016 GEN_FW_RANGE(0xb000, 0xb47f, FORCEWAKE_RENDER),
1017 GEN_FW_RANGE(0xd000, 0xd7ff, FORCEWAKE_MEDIA),
1018 GEN_FW_RANGE(0xe000, 0xe7ff, FORCEWAKE_RENDER),
1019 GEN_FW_RANGE(0xf000, 0xffff, FORCEWAKE_RENDER | FORCEWAKE_MEDIA),
1020 GEN_FW_RANGE(0x12000, 0x13fff, FORCEWAKE_MEDIA),
1021 GEN_FW_RANGE(0x1a000, 0x1bfff, FORCEWAKE_MEDIA),
1022 GEN_FW_RANGE(0x1e800, 0x1e9ff, FORCEWAKE_MEDIA),
1023 GEN_FW_RANGE(0x30000, 0x37fff, FORCEWAKE_MEDIA),
1024};
1025
1026#define __fwtable_reg_write_fw_domains(uncore, offset) \
1027({ \
1028 enum forcewake_domains __fwd = 0; \
1029 if (NEEDS_FORCE_WAKE((offset)) && !is_gen8_shadowed(offset)) \
1030 __fwd = find_fw_domain(uncore, offset); \
1031 __fwd; \
1032})
1033
1034#define __gen11_fwtable_reg_write_fw_domains(uncore, offset) \
1035({ \
1036 enum forcewake_domains __fwd = 0; \
1037 const u32 __offset = (offset); \
1038 if (!is_gen11_shadowed(__offset)) \
1039 __fwd = find_fw_domain(uncore, __offset); \
1040 __fwd; \
1041})
1042
1043#define __gen12_fwtable_reg_write_fw_domains(uncore, offset) \
1044({ \
1045 enum forcewake_domains __fwd = 0; \
1046 const u32 __offset = (offset); \
1047 if (!is_gen12_shadowed(__offset)) \
1048 __fwd = find_fw_domain(uncore, __offset); \
1049 __fwd; \
1050})
1051
1052/* *Must* be sorted by offset ranges! See intel_fw_table_check(). */
1053static const struct intel_forcewake_range __gen9_fw_ranges[] = {
1054 GEN_FW_RANGE(0x0, 0xaff, FORCEWAKE_BLITTER),
1055 GEN_FW_RANGE(0xb00, 0x1fff, 0), /* uncore range */
1056 GEN_FW_RANGE(0x2000, 0x26ff, FORCEWAKE_RENDER),
1057 GEN_FW_RANGE(0x2700, 0x2fff, FORCEWAKE_BLITTER),
1058 GEN_FW_RANGE(0x3000, 0x3fff, FORCEWAKE_RENDER),
1059 GEN_FW_RANGE(0x4000, 0x51ff, FORCEWAKE_BLITTER),
1060 GEN_FW_RANGE(0x5200, 0x7fff, FORCEWAKE_RENDER),
1061 GEN_FW_RANGE(0x8000, 0x812f, FORCEWAKE_BLITTER),
1062 GEN_FW_RANGE(0x8130, 0x813f, FORCEWAKE_MEDIA),
1063 GEN_FW_RANGE(0x8140, 0x815f, FORCEWAKE_RENDER),
1064 GEN_FW_RANGE(0x8160, 0x82ff, FORCEWAKE_BLITTER),
1065 GEN_FW_RANGE(0x8300, 0x84ff, FORCEWAKE_RENDER),
1066 GEN_FW_RANGE(0x8500, 0x87ff, FORCEWAKE_BLITTER),
1067 GEN_FW_RANGE(0x8800, 0x89ff, FORCEWAKE_MEDIA),
1068 GEN_FW_RANGE(0x8a00, 0x8bff, FORCEWAKE_BLITTER),
1069 GEN_FW_RANGE(0x8c00, 0x8cff, FORCEWAKE_RENDER),
1070 GEN_FW_RANGE(0x8d00, 0x93ff, FORCEWAKE_BLITTER),
1071 GEN_FW_RANGE(0x9400, 0x97ff, FORCEWAKE_RENDER | FORCEWAKE_MEDIA),
1072 GEN_FW_RANGE(0x9800, 0xafff, FORCEWAKE_BLITTER),
1073 GEN_FW_RANGE(0xb000, 0xb47f, FORCEWAKE_RENDER),
1074 GEN_FW_RANGE(0xb480, 0xcfff, FORCEWAKE_BLITTER),
1075 GEN_FW_RANGE(0xd000, 0xd7ff, FORCEWAKE_MEDIA),
1076 GEN_FW_RANGE(0xd800, 0xdfff, FORCEWAKE_BLITTER),
1077 GEN_FW_RANGE(0xe000, 0xe8ff, FORCEWAKE_RENDER),
1078 GEN_FW_RANGE(0xe900, 0x11fff, FORCEWAKE_BLITTER),
1079 GEN_FW_RANGE(0x12000, 0x13fff, FORCEWAKE_MEDIA),
1080 GEN_FW_RANGE(0x14000, 0x19fff, FORCEWAKE_BLITTER),
1081 GEN_FW_RANGE(0x1a000, 0x1e9ff, FORCEWAKE_MEDIA),
1082 GEN_FW_RANGE(0x1ea00, 0x243ff, FORCEWAKE_BLITTER),
1083 GEN_FW_RANGE(0x24400, 0x247ff, FORCEWAKE_RENDER),
1084 GEN_FW_RANGE(0x24800, 0x2ffff, FORCEWAKE_BLITTER),
1085 GEN_FW_RANGE(0x30000, 0x3ffff, FORCEWAKE_MEDIA),
1086};
1087
1088/* *Must* be sorted by offset ranges! See intel_fw_table_check(). */
1089static const struct intel_forcewake_range __gen11_fw_ranges[] = {
1090 GEN_FW_RANGE(0x0, 0x1fff, 0), /* uncore range */
1091 GEN_FW_RANGE(0x2000, 0x26ff, FORCEWAKE_RENDER),
1092 GEN_FW_RANGE(0x2700, 0x2fff, FORCEWAKE_BLITTER),
1093 GEN_FW_RANGE(0x3000, 0x3fff, FORCEWAKE_RENDER),
1094 GEN_FW_RANGE(0x4000, 0x51ff, FORCEWAKE_BLITTER),
1095 GEN_FW_RANGE(0x5200, 0x7fff, FORCEWAKE_RENDER),
1096 GEN_FW_RANGE(0x8000, 0x813f, FORCEWAKE_BLITTER),
1097 GEN_FW_RANGE(0x8140, 0x815f, FORCEWAKE_RENDER),
1098 GEN_FW_RANGE(0x8160, 0x82ff, FORCEWAKE_BLITTER),
1099 GEN_FW_RANGE(0x8300, 0x84ff, FORCEWAKE_RENDER),
1100 GEN_FW_RANGE(0x8500, 0x87ff, FORCEWAKE_BLITTER),
1101 GEN_FW_RANGE(0x8800, 0x8bff, 0),
1102 GEN_FW_RANGE(0x8c00, 0x8cff, FORCEWAKE_RENDER),
1103 GEN_FW_RANGE(0x8d00, 0x94cf, FORCEWAKE_BLITTER),
1104 GEN_FW_RANGE(0x94d0, 0x955f, FORCEWAKE_RENDER),
1105 GEN_FW_RANGE(0x9560, 0x95ff, 0),
1106 GEN_FW_RANGE(0x9600, 0xafff, FORCEWAKE_BLITTER),
1107 GEN_FW_RANGE(0xb000, 0xb47f, FORCEWAKE_RENDER),
1108 GEN_FW_RANGE(0xb480, 0xdeff, FORCEWAKE_BLITTER),
1109 GEN_FW_RANGE(0xdf00, 0xe8ff, FORCEWAKE_RENDER),
1110 GEN_FW_RANGE(0xe900, 0x16dff, FORCEWAKE_BLITTER),
1111 GEN_FW_RANGE(0x16e00, 0x19fff, FORCEWAKE_RENDER),
1112 GEN_FW_RANGE(0x1a000, 0x23fff, FORCEWAKE_BLITTER),
1113 GEN_FW_RANGE(0x24000, 0x2407f, 0),
1114 GEN_FW_RANGE(0x24080, 0x2417f, FORCEWAKE_BLITTER),
1115 GEN_FW_RANGE(0x24180, 0x242ff, FORCEWAKE_RENDER),
1116 GEN_FW_RANGE(0x24300, 0x243ff, FORCEWAKE_BLITTER),
1117 GEN_FW_RANGE(0x24400, 0x24fff, FORCEWAKE_RENDER),
1118 GEN_FW_RANGE(0x25000, 0x3ffff, FORCEWAKE_BLITTER),
1119 GEN_FW_RANGE(0x40000, 0x1bffff, 0),
1120 GEN_FW_RANGE(0x1c0000, 0x1c3fff, FORCEWAKE_MEDIA_VDBOX0),
1121 GEN_FW_RANGE(0x1c4000, 0x1c7fff, 0),
1122 GEN_FW_RANGE(0x1c8000, 0x1cffff, FORCEWAKE_MEDIA_VEBOX0),
1123 GEN_FW_RANGE(0x1d0000, 0x1d3fff, FORCEWAKE_MEDIA_VDBOX2),
1124 GEN_FW_RANGE(0x1d4000, 0x1dbfff, 0)
1125};
1126
1127/* *Must* be sorted by offset ranges! See intel_fw_table_check(). */
1128static const struct intel_forcewake_range __gen12_fw_ranges[] = {
1129 GEN_FW_RANGE(0x0, 0xaff, FORCEWAKE_BLITTER),
1130 GEN_FW_RANGE(0xb00, 0x1fff, 0), /* uncore range */
1131 GEN_FW_RANGE(0x2000, 0x26ff, FORCEWAKE_RENDER),
1132 GEN_FW_RANGE(0x2700, 0x2fff, FORCEWAKE_BLITTER),
1133 GEN_FW_RANGE(0x3000, 0x3fff, FORCEWAKE_RENDER),
1134 GEN_FW_RANGE(0x4000, 0x51ff, FORCEWAKE_BLITTER),
1135 GEN_FW_RANGE(0x5200, 0x7fff, FORCEWAKE_RENDER),
1136 GEN_FW_RANGE(0x8000, 0x813f, FORCEWAKE_BLITTER),
1137 GEN_FW_RANGE(0x8140, 0x815f, FORCEWAKE_RENDER),
1138 GEN_FW_RANGE(0x8160, 0x82ff, FORCEWAKE_BLITTER),
1139 GEN_FW_RANGE(0x8300, 0x84ff, FORCEWAKE_RENDER),
1140 GEN_FW_RANGE(0x8500, 0x8bff, FORCEWAKE_BLITTER),
1141 GEN_FW_RANGE(0x8c00, 0x8cff, FORCEWAKE_RENDER),
1142 GEN_FW_RANGE(0x8d00, 0x93ff, FORCEWAKE_BLITTER),
1143 GEN_FW_RANGE(0x9400, 0x97ff, FORCEWAKE_ALL),
1144 GEN_FW_RANGE(0x9800, 0xafff, FORCEWAKE_BLITTER),
1145 GEN_FW_RANGE(0xb000, 0xb47f, FORCEWAKE_RENDER),
1146 GEN_FW_RANGE(0xb480, 0xdfff, FORCEWAKE_BLITTER),
1147 GEN_FW_RANGE(0xe000, 0xe8ff, FORCEWAKE_RENDER),
1148 GEN_FW_RANGE(0xe900, 0x147ff, FORCEWAKE_BLITTER),
1149 GEN_FW_RANGE(0x14800, 0x148ff, FORCEWAKE_RENDER),
1150 GEN_FW_RANGE(0x14900, 0x19fff, FORCEWAKE_BLITTER),
1151 GEN_FW_RANGE(0x1a000, 0x1a7ff, FORCEWAKE_RENDER),
1152 GEN_FW_RANGE(0x1a800, 0x1afff, FORCEWAKE_BLITTER),
1153 GEN_FW_RANGE(0x1b000, 0x1bfff, FORCEWAKE_RENDER),
1154 GEN_FW_RANGE(0x1c000, 0x243ff, FORCEWAKE_BLITTER),
1155 GEN_FW_RANGE(0x24400, 0x247ff, FORCEWAKE_RENDER),
1156 GEN_FW_RANGE(0x24800, 0x3ffff, FORCEWAKE_BLITTER),
1157 GEN_FW_RANGE(0x40000, 0x1bffff, 0),
1158 GEN_FW_RANGE(0x1c0000, 0x1c3fff, FORCEWAKE_MEDIA_VDBOX0),
1159 GEN_FW_RANGE(0x1c4000, 0x1c7fff, FORCEWAKE_MEDIA_VDBOX1),
1160 GEN_FW_RANGE(0x1c8000, 0x1cbfff, FORCEWAKE_MEDIA_VEBOX0),
1161 GEN_FW_RANGE(0x1cc000, 0x1cffff, FORCEWAKE_BLITTER),
1162 GEN_FW_RANGE(0x1d0000, 0x1d3fff, FORCEWAKE_MEDIA_VDBOX2),
1163 GEN_FW_RANGE(0x1d4000, 0x1d7fff, FORCEWAKE_MEDIA_VDBOX3),
1164 GEN_FW_RANGE(0x1d8000, 0x1dbfff, FORCEWAKE_MEDIA_VEBOX1)
1165};
1166
1167static void
1168ilk_dummy_write(struct intel_uncore *uncore)
1169{
1170 /* WaIssueDummyWriteToWakeupFromRC6:ilk Issue a dummy write to wake up
1171 * the chip from rc6 before touching it for real. MI_MODE is masked,
1172 * hence harmless to write 0 into. */
1173 __raw_uncore_write32(uncore, MI_MODE, 0);
1174}
1175
1176static void
1177__unclaimed_reg_debug(struct intel_uncore *uncore,
1178 const i915_reg_t reg,
1179 const bool read,
1180 const bool before)
1181{
1182 if (drm_WARN(&uncore->i915->drm,
1183 check_for_unclaimed_mmio(uncore) && !before,
1184 "Unclaimed %s register 0x%x\n",
1185 read ? "read from" : "write to",
1186 i915_mmio_reg_offset(reg)))
1187 /* Only report the first N failures */
1188 uncore->i915->params.mmio_debug--;
1189}
1190
1191static inline void
1192unclaimed_reg_debug(struct intel_uncore *uncore,
1193 const i915_reg_t reg,
1194 const bool read,
1195 const bool before)
1196{
1197 if (likely(!uncore->i915->params.mmio_debug))
1198 return;
1199
1200 /* interrupts are disabled and re-enabled around uncore->lock usage */
1201 lockdep_assert_held(&uncore->lock);
1202
1203 if (before)
1204 spin_lock(&uncore->debug->lock);
1205
1206 __unclaimed_reg_debug(uncore, reg, read, before);
1207
1208 if (!before)
1209 spin_unlock(&uncore->debug->lock);
1210}
1211
1212#define GEN2_READ_HEADER(x) \
1213 u##x val = 0; \
1214 assert_rpm_wakelock_held(uncore->rpm);
1215
1216#define GEN2_READ_FOOTER \
1217 trace_i915_reg_rw(false, reg, val, sizeof(val), trace); \
1218 return val
1219
1220#define __gen2_read(x) \
1221static u##x \
1222gen2_read##x(struct intel_uncore *uncore, i915_reg_t reg, bool trace) { \
1223 GEN2_READ_HEADER(x); \
1224 val = __raw_uncore_read##x(uncore, reg); \
1225 GEN2_READ_FOOTER; \
1226}
1227
1228#define __gen5_read(x) \
1229static u##x \
1230gen5_read##x(struct intel_uncore *uncore, i915_reg_t reg, bool trace) { \
1231 GEN2_READ_HEADER(x); \
1232 ilk_dummy_write(uncore); \
1233 val = __raw_uncore_read##x(uncore, reg); \
1234 GEN2_READ_FOOTER; \
1235}
1236
1237__gen5_read(8)
1238__gen5_read(16)
1239__gen5_read(32)
1240__gen5_read(64)
1241__gen2_read(8)
1242__gen2_read(16)
1243__gen2_read(32)
1244__gen2_read(64)
1245
1246#undef __gen5_read
1247#undef __gen2_read
1248
1249#undef GEN2_READ_FOOTER
1250#undef GEN2_READ_HEADER
1251
1252#define GEN6_READ_HEADER(x) \
1253 u32 offset = i915_mmio_reg_offset(reg); \
1254 unsigned long irqflags; \
1255 u##x val = 0; \
1256 assert_rpm_wakelock_held(uncore->rpm); \
1257 spin_lock_irqsave(&uncore->lock, irqflags); \
1258 unclaimed_reg_debug(uncore, reg, true, true)
1259
1260#define GEN6_READ_FOOTER \
1261 unclaimed_reg_debug(uncore, reg, true, false); \
1262 spin_unlock_irqrestore(&uncore->lock, irqflags); \
1263 trace_i915_reg_rw(false, reg, val, sizeof(val), trace); \
1264 return val
1265
1266static noinline void ___force_wake_auto(struct intel_uncore *uncore,
1267 enum forcewake_domains fw_domains)
1268{
1269 struct intel_uncore_forcewake_domain *domain;
1270 unsigned int tmp;
1271
1272 GEM_BUG_ON(fw_domains & ~uncore->fw_domains);
1273
1274 for_each_fw_domain_masked(domain, fw_domains, uncore, tmp)
1275 fw_domain_arm_timer(domain);
1276
1277 uncore->funcs.force_wake_get(uncore, fw_domains);
1278}
1279
1280static inline void __force_wake_auto(struct intel_uncore *uncore,
1281 enum forcewake_domains fw_domains)
1282{
1283 GEM_BUG_ON(!fw_domains);
1284
1285 /* Turn on all requested but inactive supported forcewake domains. */
1286 fw_domains &= uncore->fw_domains;
1287 fw_domains &= ~uncore->fw_domains_active;
1288
1289 if (fw_domains)
1290 ___force_wake_auto(uncore, fw_domains);
1291}
1292
1293#define __gen_read(func, x) \
1294static u##x \
1295func##_read##x(struct intel_uncore *uncore, i915_reg_t reg, bool trace) { \
1296 enum forcewake_domains fw_engine; \
1297 GEN6_READ_HEADER(x); \
1298 fw_engine = __##func##_reg_read_fw_domains(uncore, offset); \
1299 if (fw_engine) \
1300 __force_wake_auto(uncore, fw_engine); \
1301 val = __raw_uncore_read##x(uncore, reg); \
1302 GEN6_READ_FOOTER; \
1303}
1304
1305#define __gen_reg_read_funcs(func) \
1306static enum forcewake_domains \
1307func##_reg_read_fw_domains(struct intel_uncore *uncore, i915_reg_t reg) { \
1308 return __##func##_reg_read_fw_domains(uncore, i915_mmio_reg_offset(reg)); \
1309} \
1310\
1311__gen_read(func, 8) \
1312__gen_read(func, 16) \
1313__gen_read(func, 32) \
1314__gen_read(func, 64)
1315
1316__gen_reg_read_funcs(gen12_fwtable);
1317__gen_reg_read_funcs(gen11_fwtable);
1318__gen_reg_read_funcs(fwtable);
1319__gen_reg_read_funcs(gen6);
1320
1321#undef __gen_reg_read_funcs
1322#undef GEN6_READ_FOOTER
1323#undef GEN6_READ_HEADER
1324
1325#define GEN2_WRITE_HEADER \
1326 trace_i915_reg_rw(true, reg, val, sizeof(val), trace); \
1327 assert_rpm_wakelock_held(uncore->rpm); \
1328
1329#define GEN2_WRITE_FOOTER
1330
1331#define __gen2_write(x) \
1332static void \
1333gen2_write##x(struct intel_uncore *uncore, i915_reg_t reg, u##x val, bool trace) { \
1334 GEN2_WRITE_HEADER; \
1335 __raw_uncore_write##x(uncore, reg, val); \
1336 GEN2_WRITE_FOOTER; \
1337}
1338
1339#define __gen5_write(x) \
1340static void \
1341gen5_write##x(struct intel_uncore *uncore, i915_reg_t reg, u##x val, bool trace) { \
1342 GEN2_WRITE_HEADER; \
1343 ilk_dummy_write(uncore); \
1344 __raw_uncore_write##x(uncore, reg, val); \
1345 GEN2_WRITE_FOOTER; \
1346}
1347
1348__gen5_write(8)
1349__gen5_write(16)
1350__gen5_write(32)
1351__gen2_write(8)
1352__gen2_write(16)
1353__gen2_write(32)
1354
1355#undef __gen5_write
1356#undef __gen2_write
1357
1358#undef GEN2_WRITE_FOOTER
1359#undef GEN2_WRITE_HEADER
1360
1361#define GEN6_WRITE_HEADER \
1362 u32 offset = i915_mmio_reg_offset(reg); \
1363 unsigned long irqflags; \
1364 trace_i915_reg_rw(true, reg, val, sizeof(val), trace); \
1365 assert_rpm_wakelock_held(uncore->rpm); \
1366 spin_lock_irqsave(&uncore->lock, irqflags); \
1367 unclaimed_reg_debug(uncore, reg, false, true)
1368
1369#define GEN6_WRITE_FOOTER \
1370 unclaimed_reg_debug(uncore, reg, false, false); \
1371 spin_unlock_irqrestore(&uncore->lock, irqflags)
1372
1373#define __gen6_write(x) \
1374static void \
1375gen6_write##x(struct intel_uncore *uncore, i915_reg_t reg, u##x val, bool trace) { \
1376 GEN6_WRITE_HEADER; \
1377 if (NEEDS_FORCE_WAKE(offset)) \
1378 __gen6_gt_wait_for_fifo(uncore); \
1379 __raw_uncore_write##x(uncore, reg, val); \
1380 GEN6_WRITE_FOOTER; \
1381}
1382__gen6_write(8)
1383__gen6_write(16)
1384__gen6_write(32)
1385
1386#define __gen_write(func, x) \
1387static void \
1388func##_write##x(struct intel_uncore *uncore, i915_reg_t reg, u##x val, bool trace) { \
1389 enum forcewake_domains fw_engine; \
1390 GEN6_WRITE_HEADER; \
1391 fw_engine = __##func##_reg_write_fw_domains(uncore, offset); \
1392 if (fw_engine) \
1393 __force_wake_auto(uncore, fw_engine); \
1394 __raw_uncore_write##x(uncore, reg, val); \
1395 GEN6_WRITE_FOOTER; \
1396}
1397
1398#define __gen_reg_write_funcs(func) \
1399static enum forcewake_domains \
1400func##_reg_write_fw_domains(struct intel_uncore *uncore, i915_reg_t reg) { \
1401 return __##func##_reg_write_fw_domains(uncore, i915_mmio_reg_offset(reg)); \
1402} \
1403\
1404__gen_write(func, 8) \
1405__gen_write(func, 16) \
1406__gen_write(func, 32)
1407
1408__gen_reg_write_funcs(gen12_fwtable);
1409__gen_reg_write_funcs(gen11_fwtable);
1410__gen_reg_write_funcs(fwtable);
1411__gen_reg_write_funcs(gen8);
1412
1413#undef __gen_reg_write_funcs
1414#undef GEN6_WRITE_FOOTER
1415#undef GEN6_WRITE_HEADER
1416
1417#define ASSIGN_RAW_WRITE_MMIO_VFUNCS(uncore, x) \
1418do { \
1419 (uncore)->funcs.mmio_writeb = x##_write8; \
1420 (uncore)->funcs.mmio_writew = x##_write16; \
1421 (uncore)->funcs.mmio_writel = x##_write32; \
1422} while (0)
1423
1424#define ASSIGN_RAW_READ_MMIO_VFUNCS(uncore, x) \
1425do { \
1426 (uncore)->funcs.mmio_readb = x##_read8; \
1427 (uncore)->funcs.mmio_readw = x##_read16; \
1428 (uncore)->funcs.mmio_readl = x##_read32; \
1429 (uncore)->funcs.mmio_readq = x##_read64; \
1430} while (0)
1431
1432#define ASSIGN_WRITE_MMIO_VFUNCS(uncore, x) \
1433do { \
1434 ASSIGN_RAW_WRITE_MMIO_VFUNCS((uncore), x); \
1435 (uncore)->funcs.write_fw_domains = x##_reg_write_fw_domains; \
1436} while (0)
1437
1438#define ASSIGN_READ_MMIO_VFUNCS(uncore, x) \
1439do { \
1440 ASSIGN_RAW_READ_MMIO_VFUNCS(uncore, x); \
1441 (uncore)->funcs.read_fw_domains = x##_reg_read_fw_domains; \
1442} while (0)
1443
1444static int __fw_domain_init(struct intel_uncore *uncore,
1445 enum forcewake_domain_id domain_id,
1446 i915_reg_t reg_set,
1447 i915_reg_t reg_ack)
1448{
1449 struct intel_uncore_forcewake_domain *d;
1450
1451 GEM_BUG_ON(domain_id >= FW_DOMAIN_ID_COUNT);
1452 GEM_BUG_ON(uncore->fw_domain[domain_id]);
1453
1454 if (i915_inject_probe_failure(uncore->i915))
1455 return -ENOMEM;
1456
1457 d = kzalloc(sizeof(*d), GFP_KERNEL);
1458 if (!d)
1459 return -ENOMEM;
1460
1461 drm_WARN_ON(&uncore->i915->drm, !i915_mmio_reg_valid(reg_set));
1462 drm_WARN_ON(&uncore->i915->drm, !i915_mmio_reg_valid(reg_ack));
1463
1464 d->uncore = uncore;
1465 d->wake_count = 0;
1466 d->reg_set = uncore->regs + i915_mmio_reg_offset(reg_set);
1467 d->reg_ack = uncore->regs + i915_mmio_reg_offset(reg_ack);
1468
1469 d->id = domain_id;
1470
1471 BUILD_BUG_ON(FORCEWAKE_RENDER != (1 << FW_DOMAIN_ID_RENDER));
1472 BUILD_BUG_ON(FORCEWAKE_BLITTER != (1 << FW_DOMAIN_ID_BLITTER));
1473 BUILD_BUG_ON(FORCEWAKE_MEDIA != (1 << FW_DOMAIN_ID_MEDIA));
1474 BUILD_BUG_ON(FORCEWAKE_MEDIA_VDBOX0 != (1 << FW_DOMAIN_ID_MEDIA_VDBOX0));
1475 BUILD_BUG_ON(FORCEWAKE_MEDIA_VDBOX1 != (1 << FW_DOMAIN_ID_MEDIA_VDBOX1));
1476 BUILD_BUG_ON(FORCEWAKE_MEDIA_VDBOX2 != (1 << FW_DOMAIN_ID_MEDIA_VDBOX2));
1477 BUILD_BUG_ON(FORCEWAKE_MEDIA_VDBOX3 != (1 << FW_DOMAIN_ID_MEDIA_VDBOX3));
1478 BUILD_BUG_ON(FORCEWAKE_MEDIA_VEBOX0 != (1 << FW_DOMAIN_ID_MEDIA_VEBOX0));
1479 BUILD_BUG_ON(FORCEWAKE_MEDIA_VEBOX1 != (1 << FW_DOMAIN_ID_MEDIA_VEBOX1));
1480
1481 d->mask = BIT(domain_id);
1482
1483 hrtimer_init(&d->timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
1484 d->timer.function = intel_uncore_fw_release_timer;
1485
1486 uncore->fw_domains |= BIT(domain_id);
1487
1488 fw_domain_reset(d);
1489
1490 uncore->fw_domain[domain_id] = d;
1491
1492 return 0;
1493}
1494
1495static void fw_domain_fini(struct intel_uncore *uncore,
1496 enum forcewake_domain_id domain_id)
1497{
1498 struct intel_uncore_forcewake_domain *d;
1499
1500 GEM_BUG_ON(domain_id >= FW_DOMAIN_ID_COUNT);
1501
1502 d = fetch_and_zero(&uncore->fw_domain[domain_id]);
1503 if (!d)
1504 return;
1505
1506 uncore->fw_domains &= ~BIT(domain_id);
1507 drm_WARN_ON(&uncore->i915->drm, d->wake_count);
1508 drm_WARN_ON(&uncore->i915->drm, hrtimer_cancel(&d->timer));
1509 kfree(d);
1510}
1511
1512static void intel_uncore_fw_domains_fini(struct intel_uncore *uncore)
1513{
1514 struct intel_uncore_forcewake_domain *d;
1515 int tmp;
1516
1517 for_each_fw_domain(d, uncore, tmp)
1518 fw_domain_fini(uncore, d->id);
1519}
1520
1521static int intel_uncore_fw_domains_init(struct intel_uncore *uncore)
1522{
1523 struct drm_i915_private *i915 = uncore->i915;
1524 int ret = 0;
1525
1526 GEM_BUG_ON(!intel_uncore_has_forcewake(uncore));
1527
1528#define fw_domain_init(uncore__, id__, set__, ack__) \
1529 (ret ?: (ret = __fw_domain_init((uncore__), (id__), (set__), (ack__))))
1530
1531 if (INTEL_GEN(i915) >= 11) {
1532 /* we'll prune the domains of missing engines later */
1533 intel_engine_mask_t emask = INTEL_INFO(i915)->platform_engine_mask;
1534 int i;
1535
1536 uncore->funcs.force_wake_get = fw_domains_get_with_fallback;
1537 uncore->funcs.force_wake_put = fw_domains_put;
1538 fw_domain_init(uncore, FW_DOMAIN_ID_RENDER,
1539 FORCEWAKE_RENDER_GEN9,
1540 FORCEWAKE_ACK_RENDER_GEN9);
1541 fw_domain_init(uncore, FW_DOMAIN_ID_BLITTER,
1542 FORCEWAKE_BLITTER_GEN9,
1543 FORCEWAKE_ACK_BLITTER_GEN9);
1544
1545 for (i = 0; i < I915_MAX_VCS; i++) {
1546 if (!__HAS_ENGINE(emask, _VCS(i)))
1547 continue;
1548
1549 fw_domain_init(uncore, FW_DOMAIN_ID_MEDIA_VDBOX0 + i,
1550 FORCEWAKE_MEDIA_VDBOX_GEN11(i),
1551 FORCEWAKE_ACK_MEDIA_VDBOX_GEN11(i));
1552 }
1553 for (i = 0; i < I915_MAX_VECS; i++) {
1554 if (!__HAS_ENGINE(emask, _VECS(i)))
1555 continue;
1556
1557 fw_domain_init(uncore, FW_DOMAIN_ID_MEDIA_VEBOX0 + i,
1558 FORCEWAKE_MEDIA_VEBOX_GEN11(i),
1559 FORCEWAKE_ACK_MEDIA_VEBOX_GEN11(i));
1560 }
1561 } else if (IS_GEN_RANGE(i915, 9, 10)) {
1562 uncore->funcs.force_wake_get = fw_domains_get_with_fallback;
1563 uncore->funcs.force_wake_put = fw_domains_put;
1564 fw_domain_init(uncore, FW_DOMAIN_ID_RENDER,
1565 FORCEWAKE_RENDER_GEN9,
1566 FORCEWAKE_ACK_RENDER_GEN9);
1567 fw_domain_init(uncore, FW_DOMAIN_ID_BLITTER,
1568 FORCEWAKE_BLITTER_GEN9,
1569 FORCEWAKE_ACK_BLITTER_GEN9);
1570 fw_domain_init(uncore, FW_DOMAIN_ID_MEDIA,
1571 FORCEWAKE_MEDIA_GEN9, FORCEWAKE_ACK_MEDIA_GEN9);
1572 } else if (IS_VALLEYVIEW(i915) || IS_CHERRYVIEW(i915)) {
1573 uncore->funcs.force_wake_get = fw_domains_get;
1574 uncore->funcs.force_wake_put = fw_domains_put;
1575 fw_domain_init(uncore, FW_DOMAIN_ID_RENDER,
1576 FORCEWAKE_VLV, FORCEWAKE_ACK_VLV);
1577 fw_domain_init(uncore, FW_DOMAIN_ID_MEDIA,
1578 FORCEWAKE_MEDIA_VLV, FORCEWAKE_ACK_MEDIA_VLV);
1579 } else if (IS_HASWELL(i915) || IS_BROADWELL(i915)) {
1580 uncore->funcs.force_wake_get =
1581 fw_domains_get_with_thread_status;
1582 uncore->funcs.force_wake_put = fw_domains_put;
1583 fw_domain_init(uncore, FW_DOMAIN_ID_RENDER,
1584 FORCEWAKE_MT, FORCEWAKE_ACK_HSW);
1585 } else if (IS_IVYBRIDGE(i915)) {
1586 u32 ecobus;
1587
1588 /* IVB configs may use multi-threaded forcewake */
1589
1590 /* A small trick here - if the bios hasn't configured
1591 * MT forcewake, and if the device is in RC6, then
1592 * force_wake_mt_get will not wake the device and the
1593 * ECOBUS read will return zero. Which will be
1594 * (correctly) interpreted by the test below as MT
1595 * forcewake being disabled.
1596 */
1597 uncore->funcs.force_wake_get =
1598 fw_domains_get_with_thread_status;
1599 uncore->funcs.force_wake_put = fw_domains_put;
1600
1601 /* We need to init first for ECOBUS access and then
1602 * determine later if we want to reinit, in case of MT access is
1603 * not working. In this stage we don't know which flavour this
1604 * ivb is, so it is better to reset also the gen6 fw registers
1605 * before the ecobus check.
1606 */
1607
1608 __raw_uncore_write32(uncore, FORCEWAKE, 0);
1609 __raw_posting_read(uncore, ECOBUS);
1610
1611 ret = __fw_domain_init(uncore, FW_DOMAIN_ID_RENDER,
1612 FORCEWAKE_MT, FORCEWAKE_MT_ACK);
1613 if (ret)
1614 goto out;
1615
1616 spin_lock_irq(&uncore->lock);
1617 fw_domains_get_with_thread_status(uncore, FORCEWAKE_RENDER);
1618 ecobus = __raw_uncore_read32(uncore, ECOBUS);
1619 fw_domains_put(uncore, FORCEWAKE_RENDER);
1620 spin_unlock_irq(&uncore->lock);
1621
1622 if (!(ecobus & FORCEWAKE_MT_ENABLE)) {
1623 drm_info(&i915->drm, "No MT forcewake available on Ivybridge, this can result in issues\n");
1624 drm_info(&i915->drm, "when using vblank-synced partial screen updates.\n");
1625 fw_domain_fini(uncore, FW_DOMAIN_ID_RENDER);
1626 fw_domain_init(uncore, FW_DOMAIN_ID_RENDER,
1627 FORCEWAKE, FORCEWAKE_ACK);
1628 }
1629 } else if (IS_GEN(i915, 6)) {
1630 uncore->funcs.force_wake_get =
1631 fw_domains_get_with_thread_status;
1632 uncore->funcs.force_wake_put = fw_domains_put;
1633 fw_domain_init(uncore, FW_DOMAIN_ID_RENDER,
1634 FORCEWAKE, FORCEWAKE_ACK);
1635 }
1636
1637#undef fw_domain_init
1638
1639 /* All future platforms are expected to require complex power gating */
1640 drm_WARN_ON(&i915->drm, !ret && uncore->fw_domains == 0);
1641
1642out:
1643 if (ret)
1644 intel_uncore_fw_domains_fini(uncore);
1645
1646 return ret;
1647}
1648
1649#define ASSIGN_FW_DOMAINS_TABLE(uncore, d) \
1650{ \
1651 (uncore)->fw_domains_table = \
1652 (struct intel_forcewake_range *)(d); \
1653 (uncore)->fw_domains_table_entries = ARRAY_SIZE((d)); \
1654}
1655
1656static int i915_pmic_bus_access_notifier(struct notifier_block *nb,
1657 unsigned long action, void *data)
1658{
1659 struct intel_uncore *uncore = container_of(nb,
1660 struct intel_uncore, pmic_bus_access_nb);
1661
1662 switch (action) {
1663 case MBI_PMIC_BUS_ACCESS_BEGIN:
1664 /*
1665 * forcewake all now to make sure that we don't need to do a
1666 * forcewake later which on systems where this notifier gets
1667 * called requires the punit to access to the shared pmic i2c
1668 * bus, which will be busy after this notification, leading to:
1669 * "render: timed out waiting for forcewake ack request."
1670 * errors.
1671 *
1672 * The notifier is unregistered during intel_runtime_suspend(),
1673 * so it's ok to access the HW here without holding a RPM
1674 * wake reference -> disable wakeref asserts for the time of
1675 * the access.
1676 */
1677 disable_rpm_wakeref_asserts(uncore->rpm);
1678 intel_uncore_forcewake_get(uncore, FORCEWAKE_ALL);
1679 enable_rpm_wakeref_asserts(uncore->rpm);
1680 break;
1681 case MBI_PMIC_BUS_ACCESS_END:
1682 intel_uncore_forcewake_put(uncore, FORCEWAKE_ALL);
1683 break;
1684 }
1685
1686 return NOTIFY_OK;
1687}
1688
1689static int uncore_mmio_setup(struct intel_uncore *uncore)
1690{
1691 struct drm_i915_private *i915 = uncore->i915;
1692 struct pci_dev *pdev = i915->drm.pdev;
1693 int mmio_bar;
1694 int mmio_size;
1695
1696 mmio_bar = IS_GEN(i915, 2) ? 1 : 0;
1697 /*
1698 * Before gen4, the registers and the GTT are behind different BARs.
1699 * However, from gen4 onwards, the registers and the GTT are shared
1700 * in the same BAR, so we want to restrict this ioremap from
1701 * clobbering the GTT which we want ioremap_wc instead. Fortunately,
1702 * the register BAR remains the same size for all the earlier
1703 * generations up to Ironlake.
1704 */
1705 if (INTEL_GEN(i915) < 5)
1706 mmio_size = 512 * 1024;
1707 else
1708 mmio_size = 2 * 1024 * 1024;
1709 uncore->regs = pci_iomap(pdev, mmio_bar, mmio_size);
1710 if (uncore->regs == NULL) {
1711 drm_err(&i915->drm, "failed to map registers\n");
1712 return -EIO;
1713 }
1714
1715 return 0;
1716}
1717
1718static void uncore_mmio_cleanup(struct intel_uncore *uncore)
1719{
1720 struct pci_dev *pdev = uncore->i915->drm.pdev;
1721
1722 pci_iounmap(pdev, uncore->regs);
1723}
1724
1725void intel_uncore_init_early(struct intel_uncore *uncore,
1726 struct drm_i915_private *i915)
1727{
1728 spin_lock_init(&uncore->lock);
1729 uncore->i915 = i915;
1730 uncore->rpm = &i915->runtime_pm;
1731 uncore->debug = &i915->mmio_debug;
1732}
1733
1734static void uncore_raw_init(struct intel_uncore *uncore)
1735{
1736 GEM_BUG_ON(intel_uncore_has_forcewake(uncore));
1737
1738 if (IS_GEN(uncore->i915, 5)) {
1739 ASSIGN_RAW_WRITE_MMIO_VFUNCS(uncore, gen5);
1740 ASSIGN_RAW_READ_MMIO_VFUNCS(uncore, gen5);
1741 } else {
1742 ASSIGN_RAW_WRITE_MMIO_VFUNCS(uncore, gen2);
1743 ASSIGN_RAW_READ_MMIO_VFUNCS(uncore, gen2);
1744 }
1745}
1746
1747static int uncore_forcewake_init(struct intel_uncore *uncore)
1748{
1749 struct drm_i915_private *i915 = uncore->i915;
1750 int ret;
1751
1752 GEM_BUG_ON(!intel_uncore_has_forcewake(uncore));
1753
1754 ret = intel_uncore_fw_domains_init(uncore);
1755 if (ret)
1756 return ret;
1757 forcewake_early_sanitize(uncore, 0);
1758
1759 if (IS_GEN_RANGE(i915, 6, 7)) {
1760 ASSIGN_WRITE_MMIO_VFUNCS(uncore, gen6);
1761
1762 if (IS_VALLEYVIEW(i915)) {
1763 ASSIGN_FW_DOMAINS_TABLE(uncore, __vlv_fw_ranges);
1764 ASSIGN_READ_MMIO_VFUNCS(uncore, fwtable);
1765 } else {
1766 ASSIGN_READ_MMIO_VFUNCS(uncore, gen6);
1767 }
1768 } else if (IS_GEN(i915, 8)) {
1769 if (IS_CHERRYVIEW(i915)) {
1770 ASSIGN_FW_DOMAINS_TABLE(uncore, __chv_fw_ranges);
1771 ASSIGN_WRITE_MMIO_VFUNCS(uncore, fwtable);
1772 ASSIGN_READ_MMIO_VFUNCS(uncore, fwtable);
1773 } else {
1774 ASSIGN_WRITE_MMIO_VFUNCS(uncore, gen8);
1775 ASSIGN_READ_MMIO_VFUNCS(uncore, gen6);
1776 }
1777 } else if (IS_GEN_RANGE(i915, 9, 10)) {
1778 ASSIGN_FW_DOMAINS_TABLE(uncore, __gen9_fw_ranges);
1779 ASSIGN_WRITE_MMIO_VFUNCS(uncore, fwtable);
1780 ASSIGN_READ_MMIO_VFUNCS(uncore, fwtable);
1781 } else if (IS_GEN(i915, 11)) {
1782 ASSIGN_FW_DOMAINS_TABLE(uncore, __gen11_fw_ranges);
1783 ASSIGN_WRITE_MMIO_VFUNCS(uncore, gen11_fwtable);
1784 ASSIGN_READ_MMIO_VFUNCS(uncore, gen11_fwtable);
1785 } else {
1786 ASSIGN_FW_DOMAINS_TABLE(uncore, __gen12_fw_ranges);
1787 ASSIGN_WRITE_MMIO_VFUNCS(uncore, gen12_fwtable);
1788 ASSIGN_READ_MMIO_VFUNCS(uncore, gen12_fwtable);
1789 }
1790
1791 uncore->pmic_bus_access_nb.notifier_call = i915_pmic_bus_access_notifier;
1792 iosf_mbi_register_pmic_bus_access_notifier(&uncore->pmic_bus_access_nb);
1793
1794 return 0;
1795}
1796
1797int intel_uncore_init_mmio(struct intel_uncore *uncore)
1798{
1799 struct drm_i915_private *i915 = uncore->i915;
1800 int ret;
1801
1802 ret = uncore_mmio_setup(uncore);
1803 if (ret)
1804 return ret;
1805
1806 if (INTEL_GEN(i915) > 5 && !intel_vgpu_active(i915))
1807 uncore->flags |= UNCORE_HAS_FORCEWAKE;
1808
1809 if (!intel_uncore_has_forcewake(uncore)) {
1810 uncore_raw_init(uncore);
1811 } else {
1812 ret = uncore_forcewake_init(uncore);
1813 if (ret)
1814 goto out_mmio_cleanup;
1815 }
1816
1817 /* make sure fw funcs are set if and only if we have fw*/
1818 GEM_BUG_ON(intel_uncore_has_forcewake(uncore) != !!uncore->funcs.force_wake_get);
1819 GEM_BUG_ON(intel_uncore_has_forcewake(uncore) != !!uncore->funcs.force_wake_put);
1820 GEM_BUG_ON(intel_uncore_has_forcewake(uncore) != !!uncore->funcs.read_fw_domains);
1821 GEM_BUG_ON(intel_uncore_has_forcewake(uncore) != !!uncore->funcs.write_fw_domains);
1822
1823 if (HAS_FPGA_DBG_UNCLAIMED(i915))
1824 uncore->flags |= UNCORE_HAS_FPGA_DBG_UNCLAIMED;
1825
1826 if (IS_VALLEYVIEW(i915) || IS_CHERRYVIEW(i915))
1827 uncore->flags |= UNCORE_HAS_DBG_UNCLAIMED;
1828
1829 if (IS_GEN_RANGE(i915, 6, 7))
1830 uncore->flags |= UNCORE_HAS_FIFO;
1831
1832 /* clear out unclaimed reg detection bit */
1833 if (intel_uncore_unclaimed_mmio(uncore))
1834 drm_dbg(&i915->drm, "unclaimed mmio detected on uncore init, clearing\n");
1835
1836 return 0;
1837
1838out_mmio_cleanup:
1839 uncore_mmio_cleanup(uncore);
1840
1841 return ret;
1842}
1843
1844/*
1845 * We might have detected that some engines are fused off after we initialized
1846 * the forcewake domains. Prune them, to make sure they only reference existing
1847 * engines.
1848 */
1849void intel_uncore_prune_engine_fw_domains(struct intel_uncore *uncore,
1850 struct intel_gt *gt)
1851{
1852 enum forcewake_domains fw_domains = uncore->fw_domains;
1853 enum forcewake_domain_id domain_id;
1854 int i;
1855
1856 if (!intel_uncore_has_forcewake(uncore) || INTEL_GEN(uncore->i915) < 11)
1857 return;
1858
1859 for (i = 0; i < I915_MAX_VCS; i++) {
1860 domain_id = FW_DOMAIN_ID_MEDIA_VDBOX0 + i;
1861
1862 if (HAS_ENGINE(gt, _VCS(i)))
1863 continue;
1864
1865 if (fw_domains & BIT(domain_id))
1866 fw_domain_fini(uncore, domain_id);
1867 }
1868
1869 for (i = 0; i < I915_MAX_VECS; i++) {
1870 domain_id = FW_DOMAIN_ID_MEDIA_VEBOX0 + i;
1871
1872 if (HAS_ENGINE(gt, _VECS(i)))
1873 continue;
1874
1875 if (fw_domains & BIT(domain_id))
1876 fw_domain_fini(uncore, domain_id);
1877 }
1878}
1879
1880void intel_uncore_fini_mmio(struct intel_uncore *uncore)
1881{
1882 if (intel_uncore_has_forcewake(uncore)) {
1883 iosf_mbi_punit_acquire();
1884 iosf_mbi_unregister_pmic_bus_access_notifier_unlocked(
1885 &uncore->pmic_bus_access_nb);
1886 intel_uncore_forcewake_reset(uncore);
1887 intel_uncore_fw_domains_fini(uncore);
1888 iosf_mbi_punit_release();
1889 }
1890
1891 uncore_mmio_cleanup(uncore);
1892}
1893
1894static const struct reg_whitelist {
1895 i915_reg_t offset_ldw;
1896 i915_reg_t offset_udw;
1897 u16 gen_mask;
1898 u8 size;
1899} reg_read_whitelist[] = { {
1900 .offset_ldw = RING_TIMESTAMP(RENDER_RING_BASE),
1901 .offset_udw = RING_TIMESTAMP_UDW(RENDER_RING_BASE),
1902 .gen_mask = INTEL_GEN_MASK(4, 12),
1903 .size = 8
1904} };
1905
1906int i915_reg_read_ioctl(struct drm_device *dev,
1907 void *data, struct drm_file *file)
1908{
1909 struct drm_i915_private *i915 = to_i915(dev);
1910 struct intel_uncore *uncore = &i915->uncore;
1911 struct drm_i915_reg_read *reg = data;
1912 struct reg_whitelist const *entry;
1913 intel_wakeref_t wakeref;
1914 unsigned int flags;
1915 int remain;
1916 int ret = 0;
1917
1918 entry = reg_read_whitelist;
1919 remain = ARRAY_SIZE(reg_read_whitelist);
1920 while (remain) {
1921 u32 entry_offset = i915_mmio_reg_offset(entry->offset_ldw);
1922
1923 GEM_BUG_ON(!is_power_of_2(entry->size));
1924 GEM_BUG_ON(entry->size > 8);
1925 GEM_BUG_ON(entry_offset & (entry->size - 1));
1926
1927 if (INTEL_INFO(i915)->gen_mask & entry->gen_mask &&
1928 entry_offset == (reg->offset & -entry->size))
1929 break;
1930 entry++;
1931 remain--;
1932 }
1933
1934 if (!remain)
1935 return -EINVAL;
1936
1937 flags = reg->offset & (entry->size - 1);
1938
1939 with_intel_runtime_pm(&i915->runtime_pm, wakeref) {
1940 if (entry->size == 8 && flags == I915_REG_READ_8B_WA)
1941 reg->val = intel_uncore_read64_2x32(uncore,
1942 entry->offset_ldw,
1943 entry->offset_udw);
1944 else if (entry->size == 8 && flags == 0)
1945 reg->val = intel_uncore_read64(uncore,
1946 entry->offset_ldw);
1947 else if (entry->size == 4 && flags == 0)
1948 reg->val = intel_uncore_read(uncore, entry->offset_ldw);
1949 else if (entry->size == 2 && flags == 0)
1950 reg->val = intel_uncore_read16(uncore,
1951 entry->offset_ldw);
1952 else if (entry->size == 1 && flags == 0)
1953 reg->val = intel_uncore_read8(uncore,
1954 entry->offset_ldw);
1955 else
1956 ret = -EINVAL;
1957 }
1958
1959 return ret;
1960}
1961
1962/**
1963 * __intel_wait_for_register_fw - wait until register matches expected state
1964 * @uncore: the struct intel_uncore
1965 * @reg: the register to read
1966 * @mask: mask to apply to register value
1967 * @value: expected value
1968 * @fast_timeout_us: fast timeout in microsecond for atomic/tight wait
1969 * @slow_timeout_ms: slow timeout in millisecond
1970 * @out_value: optional placeholder to hold registry value
1971 *
1972 * This routine waits until the target register @reg contains the expected
1973 * @value after applying the @mask, i.e. it waits until ::
1974 *
1975 * (I915_READ_FW(reg) & mask) == value
1976 *
1977 * Otherwise, the wait will timeout after @slow_timeout_ms milliseconds.
1978 * For atomic context @slow_timeout_ms must be zero and @fast_timeout_us
1979 * must be not larger than 20,0000 microseconds.
1980 *
1981 * Note that this routine assumes the caller holds forcewake asserted, it is
1982 * not suitable for very long waits. See intel_wait_for_register() if you
1983 * wish to wait without holding forcewake for the duration (i.e. you expect
1984 * the wait to be slow).
1985 *
1986 * Return: 0 if the register matches the desired condition, or -ETIMEDOUT.
1987 */
1988int __intel_wait_for_register_fw(struct intel_uncore *uncore,
1989 i915_reg_t reg,
1990 u32 mask,
1991 u32 value,
1992 unsigned int fast_timeout_us,
1993 unsigned int slow_timeout_ms,
1994 u32 *out_value)
1995{
1996 u32 reg_value;
1997#define done (((reg_value = intel_uncore_read_fw(uncore, reg)) & mask) == value)
1998 int ret;
1999
2000 /* Catch any overuse of this function */
2001 might_sleep_if(slow_timeout_ms);
2002 GEM_BUG_ON(fast_timeout_us > 20000);
2003
2004 ret = -ETIMEDOUT;
2005 if (fast_timeout_us && fast_timeout_us <= 20000)
2006 ret = _wait_for_atomic(done, fast_timeout_us, 0);
2007 if (ret && slow_timeout_ms)
2008 ret = wait_for(done, slow_timeout_ms);
2009
2010 if (out_value)
2011 *out_value = reg_value;
2012
2013 return ret;
2014#undef done
2015}
2016
2017/**
2018 * __intel_wait_for_register - wait until register matches expected state
2019 * @uncore: the struct intel_uncore
2020 * @reg: the register to read
2021 * @mask: mask to apply to register value
2022 * @value: expected value
2023 * @fast_timeout_us: fast timeout in microsecond for atomic/tight wait
2024 * @slow_timeout_ms: slow timeout in millisecond
2025 * @out_value: optional placeholder to hold registry value
2026 *
2027 * This routine waits until the target register @reg contains the expected
2028 * @value after applying the @mask, i.e. it waits until ::
2029 *
2030 * (I915_READ(reg) & mask) == value
2031 *
2032 * Otherwise, the wait will timeout after @timeout_ms milliseconds.
2033 *
2034 * Return: 0 if the register matches the desired condition, or -ETIMEDOUT.
2035 */
2036int __intel_wait_for_register(struct intel_uncore *uncore,
2037 i915_reg_t reg,
2038 u32 mask,
2039 u32 value,
2040 unsigned int fast_timeout_us,
2041 unsigned int slow_timeout_ms,
2042 u32 *out_value)
2043{
2044 unsigned fw =
2045 intel_uncore_forcewake_for_reg(uncore, reg, FW_REG_READ);
2046 u32 reg_value;
2047 int ret;
2048
2049 might_sleep_if(slow_timeout_ms);
2050
2051 spin_lock_irq(&uncore->lock);
2052 intel_uncore_forcewake_get__locked(uncore, fw);
2053
2054 ret = __intel_wait_for_register_fw(uncore,
2055 reg, mask, value,
2056 fast_timeout_us, 0, ®_value);
2057
2058 intel_uncore_forcewake_put__locked(uncore, fw);
2059 spin_unlock_irq(&uncore->lock);
2060
2061 if (ret && slow_timeout_ms)
2062 ret = __wait_for(reg_value = intel_uncore_read_notrace(uncore,
2063 reg),
2064 (reg_value & mask) == value,
2065 slow_timeout_ms * 1000, 10, 1000);
2066
2067 /* just trace the final value */
2068 trace_i915_reg_rw(false, reg, reg_value, sizeof(reg_value), true);
2069
2070 if (out_value)
2071 *out_value = reg_value;
2072
2073 return ret;
2074}
2075
2076bool intel_uncore_unclaimed_mmio(struct intel_uncore *uncore)
2077{
2078 bool ret;
2079
2080 spin_lock_irq(&uncore->debug->lock);
2081 ret = check_for_unclaimed_mmio(uncore);
2082 spin_unlock_irq(&uncore->debug->lock);
2083
2084 return ret;
2085}
2086
2087bool
2088intel_uncore_arm_unclaimed_mmio_detection(struct intel_uncore *uncore)
2089{
2090 bool ret = false;
2091
2092 spin_lock_irq(&uncore->debug->lock);
2093
2094 if (unlikely(uncore->debug->unclaimed_mmio_check <= 0))
2095 goto out;
2096
2097 if (unlikely(check_for_unclaimed_mmio(uncore))) {
2098 if (!uncore->i915->params.mmio_debug) {
2099 drm_dbg(&uncore->i915->drm,
2100 "Unclaimed register detected, "
2101 "enabling oneshot unclaimed register reporting. "
2102 "Please use i915.mmio_debug=N for more information.\n");
2103 uncore->i915->params.mmio_debug++;
2104 }
2105 uncore->debug->unclaimed_mmio_check--;
2106 ret = true;
2107 }
2108
2109out:
2110 spin_unlock_irq(&uncore->debug->lock);
2111
2112 return ret;
2113}
2114
2115/**
2116 * intel_uncore_forcewake_for_reg - which forcewake domains are needed to access
2117 * a register
2118 * @uncore: pointer to struct intel_uncore
2119 * @reg: register in question
2120 * @op: operation bitmask of FW_REG_READ and/or FW_REG_WRITE
2121 *
2122 * Returns a set of forcewake domains required to be taken with for example
2123 * intel_uncore_forcewake_get for the specified register to be accessible in the
2124 * specified mode (read, write or read/write) with raw mmio accessors.
2125 *
2126 * NOTE: On Gen6 and Gen7 write forcewake domain (FORCEWAKE_RENDER) requires the
2127 * callers to do FIFO management on their own or risk losing writes.
2128 */
2129enum forcewake_domains
2130intel_uncore_forcewake_for_reg(struct intel_uncore *uncore,
2131 i915_reg_t reg, unsigned int op)
2132{
2133 enum forcewake_domains fw_domains = 0;
2134
2135 drm_WARN_ON(&uncore->i915->drm, !op);
2136
2137 if (!intel_uncore_has_forcewake(uncore))
2138 return 0;
2139
2140 if (op & FW_REG_READ)
2141 fw_domains = uncore->funcs.read_fw_domains(uncore, reg);
2142
2143 if (op & FW_REG_WRITE)
2144 fw_domains |= uncore->funcs.write_fw_domains(uncore, reg);
2145
2146 drm_WARN_ON(&uncore->i915->drm, fw_domains & ~uncore->fw_domains);
2147
2148 return fw_domains;
2149}
2150
2151#if IS_ENABLED(CONFIG_DRM_I915_SELFTEST)
2152#include "selftests/mock_uncore.c"
2153#include "selftests/intel_uncore.c"
2154#endif