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 <drm/drm_managed.h>
25 #include <linux/pm_runtime.h>
26 
27 #include "gt/intel_engine_regs.h"
28 #include "gt/intel_gt_regs.h"
29 
30 #include "i915_drv.h"
31 #include "i915_iosf_mbi.h"
32 #include "i915_trace.h"
33 #include "i915_vgpu.h"
34 #include "intel_pm.h"
35 
36 #define FORCEWAKE_ACK_TIMEOUT_MS 50
37 #define GT_FIFO_TIMEOUT_MS	 10
38 
39 #define __raw_posting_read(...) ((void)__raw_uncore_read32(__VA_ARGS__))
40 
41 static void
fw_domains_get(struct intel_uncore * uncore,enum forcewake_domains fw_domains)42 fw_domains_get(struct intel_uncore *uncore, enum forcewake_domains fw_domains)
43 {
44 	uncore->fw_get_funcs->force_wake_get(uncore, fw_domains);
45 }
46 
47 void
intel_uncore_mmio_debug_init_early(struct drm_i915_private * i915)48 intel_uncore_mmio_debug_init_early(struct drm_i915_private *i915)
49 {
50 	spin_lock_init(&i915->mmio_debug.lock);
51 	i915->mmio_debug.unclaimed_mmio_check = 1;
52 
53 	i915->uncore.debug = &i915->mmio_debug;
54 }
55 
mmio_debug_suspend(struct intel_uncore * uncore)56 static void mmio_debug_suspend(struct intel_uncore *uncore)
57 {
58 	if (!uncore->debug)
59 		return;
60 
61 	spin_lock(&uncore->debug->lock);
62 
63 	/* Save and disable mmio debugging for the user bypass */
64 	if (!uncore->debug->suspend_count++) {
65 		uncore->debug->saved_mmio_check = uncore->debug->unclaimed_mmio_check;
66 		uncore->debug->unclaimed_mmio_check = 0;
67 	}
68 
69 	spin_unlock(&uncore->debug->lock);
70 }
71 
72 static bool check_for_unclaimed_mmio(struct intel_uncore *uncore);
73 
mmio_debug_resume(struct intel_uncore * uncore)74 static void mmio_debug_resume(struct intel_uncore *uncore)
75 {
76 	if (!uncore->debug)
77 		return;
78 
79 	spin_lock(&uncore->debug->lock);
80 
81 	if (!--uncore->debug->suspend_count)
82 		uncore->debug->unclaimed_mmio_check = uncore->debug->saved_mmio_check;
83 
84 	if (check_for_unclaimed_mmio(uncore))
85 		drm_info(&uncore->i915->drm,
86 			 "Invalid mmio detected during user access\n");
87 
88 	spin_unlock(&uncore->debug->lock);
89 }
90 
91 static const char * const forcewake_domain_names[] = {
92 	"render",
93 	"gt",
94 	"media",
95 	"vdbox0",
96 	"vdbox1",
97 	"vdbox2",
98 	"vdbox3",
99 	"vdbox4",
100 	"vdbox5",
101 	"vdbox6",
102 	"vdbox7",
103 	"vebox0",
104 	"vebox1",
105 	"vebox2",
106 	"vebox3",
107 };
108 
109 const char *
intel_uncore_forcewake_domain_to_str(const enum forcewake_domain_id id)110 intel_uncore_forcewake_domain_to_str(const enum forcewake_domain_id id)
111 {
112 	BUILD_BUG_ON(ARRAY_SIZE(forcewake_domain_names) != FW_DOMAIN_ID_COUNT);
113 
114 	if (id >= 0 && id < FW_DOMAIN_ID_COUNT)
115 		return forcewake_domain_names[id];
116 
117 	WARN_ON(id);
118 
119 	return "unknown";
120 }
121 
122 #define fw_ack(d) readl((d)->reg_ack)
123 #define fw_set(d, val) writel(_MASKED_BIT_ENABLE((val)), (d)->reg_set)
124 #define fw_clear(d, val) writel(_MASKED_BIT_DISABLE((val)), (d)->reg_set)
125 
126 static inline void
fw_domain_reset(const struct intel_uncore_forcewake_domain * d)127 fw_domain_reset(const struct intel_uncore_forcewake_domain *d)
128 {
129 	/*
130 	 * We don't really know if the powerwell for the forcewake domain we are
131 	 * trying to reset here does exist at this point (engines could be fused
132 	 * off in ICL+), so no waiting for acks
133 	 */
134 	/* WaRsClearFWBitsAtReset */
135 	if (GRAPHICS_VER(d->uncore->i915) >= 12)
136 		fw_clear(d, 0xefff);
137 	else
138 		fw_clear(d, 0xffff);
139 }
140 
141 static inline void
fw_domain_arm_timer(struct intel_uncore_forcewake_domain * d)142 fw_domain_arm_timer(struct intel_uncore_forcewake_domain *d)
143 {
144 	GEM_BUG_ON(d->uncore->fw_domains_timer & d->mask);
145 	d->uncore->fw_domains_timer |= d->mask;
146 	d->wake_count++;
147 	hrtimer_start_range_ns(&d->timer,
148 			       NSEC_PER_MSEC,
149 			       NSEC_PER_MSEC,
150 			       HRTIMER_MODE_REL);
151 }
152 
153 static inline int
__wait_for_ack(const struct intel_uncore_forcewake_domain * d,const u32 ack,const u32 value)154 __wait_for_ack(const struct intel_uncore_forcewake_domain *d,
155 	       const u32 ack,
156 	       const u32 value)
157 {
158 	return wait_for_atomic((fw_ack(d) & ack) == value,
159 			       FORCEWAKE_ACK_TIMEOUT_MS);
160 }
161 
162 static inline int
wait_ack_clear(const struct intel_uncore_forcewake_domain * d,const u32 ack)163 wait_ack_clear(const struct intel_uncore_forcewake_domain *d,
164 	       const u32 ack)
165 {
166 	return __wait_for_ack(d, ack, 0);
167 }
168 
169 static inline int
wait_ack_set(const struct intel_uncore_forcewake_domain * d,const u32 ack)170 wait_ack_set(const struct intel_uncore_forcewake_domain *d,
171 	     const u32 ack)
172 {
173 	return __wait_for_ack(d, ack, ack);
174 }
175 
176 static inline void
fw_domain_wait_ack_clear(const struct intel_uncore_forcewake_domain * d)177 fw_domain_wait_ack_clear(const struct intel_uncore_forcewake_domain *d)
178 {
179 	if (wait_ack_clear(d, FORCEWAKE_KERNEL)) {
180 		DRM_ERROR("%s: timed out waiting for forcewake ack to clear.\n",
181 			  intel_uncore_forcewake_domain_to_str(d->id));
182 		add_taint_for_CI(d->uncore->i915, TAINT_WARN); /* CI now unreliable */
183 	}
184 }
185 
186 enum ack_type {
187 	ACK_CLEAR = 0,
188 	ACK_SET
189 };
190 
191 static int
fw_domain_wait_ack_with_fallback(const struct intel_uncore_forcewake_domain * d,const enum ack_type type)192 fw_domain_wait_ack_with_fallback(const struct intel_uncore_forcewake_domain *d,
193 				 const enum ack_type type)
194 {
195 	const u32 ack_bit = FORCEWAKE_KERNEL;
196 	const u32 value = type == ACK_SET ? ack_bit : 0;
197 	unsigned int pass;
198 	bool ack_detected;
199 
200 	/*
201 	 * There is a possibility of driver's wake request colliding
202 	 * with hardware's own wake requests and that can cause
203 	 * hardware to not deliver the driver's ack message.
204 	 *
205 	 * Use a fallback bit toggle to kick the gpu state machine
206 	 * in the hope that the original ack will be delivered along with
207 	 * the fallback ack.
208 	 *
209 	 * This workaround is described in HSDES #1604254524 and it's known as:
210 	 * WaRsForcewakeAddDelayForAck:skl,bxt,kbl,glk,cfl,cnl,icl
211 	 * although the name is a bit misleading.
212 	 */
213 
214 	pass = 1;
215 	do {
216 		wait_ack_clear(d, FORCEWAKE_KERNEL_FALLBACK);
217 
218 		fw_set(d, FORCEWAKE_KERNEL_FALLBACK);
219 		/* Give gt some time to relax before the polling frenzy */
220 		udelay(10 * pass);
221 		wait_ack_set(d, FORCEWAKE_KERNEL_FALLBACK);
222 
223 		ack_detected = (fw_ack(d) & ack_bit) == value;
224 
225 		fw_clear(d, FORCEWAKE_KERNEL_FALLBACK);
226 	} while (!ack_detected && pass++ < 10);
227 
228 	DRM_DEBUG_DRIVER("%s had to use fallback to %s ack, 0x%x (passes %u)\n",
229 			 intel_uncore_forcewake_domain_to_str(d->id),
230 			 type == ACK_SET ? "set" : "clear",
231 			 fw_ack(d),
232 			 pass);
233 
234 	return ack_detected ? 0 : -ETIMEDOUT;
235 }
236 
237 static inline void
fw_domain_wait_ack_clear_fallback(const struct intel_uncore_forcewake_domain * d)238 fw_domain_wait_ack_clear_fallback(const struct intel_uncore_forcewake_domain *d)
239 {
240 	if (likely(!wait_ack_clear(d, FORCEWAKE_KERNEL)))
241 		return;
242 
243 	if (fw_domain_wait_ack_with_fallback(d, ACK_CLEAR))
244 		fw_domain_wait_ack_clear(d);
245 }
246 
247 static inline void
fw_domain_get(const struct intel_uncore_forcewake_domain * d)248 fw_domain_get(const struct intel_uncore_forcewake_domain *d)
249 {
250 	fw_set(d, FORCEWAKE_KERNEL);
251 }
252 
253 static inline void
fw_domain_wait_ack_set(const struct intel_uncore_forcewake_domain * d)254 fw_domain_wait_ack_set(const struct intel_uncore_forcewake_domain *d)
255 {
256 	if (wait_ack_set(d, FORCEWAKE_KERNEL)) {
257 		DRM_ERROR("%s: timed out waiting for forcewake ack request.\n",
258 			  intel_uncore_forcewake_domain_to_str(d->id));
259 		add_taint_for_CI(d->uncore->i915, TAINT_WARN); /* CI now unreliable */
260 	}
261 }
262 
263 static inline void
fw_domain_wait_ack_set_fallback(const struct intel_uncore_forcewake_domain * d)264 fw_domain_wait_ack_set_fallback(const struct intel_uncore_forcewake_domain *d)
265 {
266 	if (likely(!wait_ack_set(d, FORCEWAKE_KERNEL)))
267 		return;
268 
269 	if (fw_domain_wait_ack_with_fallback(d, ACK_SET))
270 		fw_domain_wait_ack_set(d);
271 }
272 
273 static inline void
fw_domain_put(const struct intel_uncore_forcewake_domain * d)274 fw_domain_put(const struct intel_uncore_forcewake_domain *d)
275 {
276 	fw_clear(d, FORCEWAKE_KERNEL);
277 }
278 
279 static void
fw_domains_get_normal(struct intel_uncore * uncore,enum forcewake_domains fw_domains)280 fw_domains_get_normal(struct intel_uncore *uncore, enum forcewake_domains fw_domains)
281 {
282 	struct intel_uncore_forcewake_domain *d;
283 	unsigned int tmp;
284 
285 	GEM_BUG_ON(fw_domains & ~uncore->fw_domains);
286 
287 	for_each_fw_domain_masked(d, fw_domains, uncore, tmp) {
288 		fw_domain_wait_ack_clear(d);
289 		fw_domain_get(d);
290 	}
291 
292 	for_each_fw_domain_masked(d, fw_domains, uncore, tmp)
293 		fw_domain_wait_ack_set(d);
294 
295 	uncore->fw_domains_active |= fw_domains;
296 }
297 
298 static void
fw_domains_get_with_fallback(struct intel_uncore * uncore,enum forcewake_domains fw_domains)299 fw_domains_get_with_fallback(struct intel_uncore *uncore,
300 			     enum forcewake_domains fw_domains)
301 {
302 	struct intel_uncore_forcewake_domain *d;
303 	unsigned int tmp;
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_wait_ack_clear_fallback(d);
309 		fw_domain_get(d);
310 	}
311 
312 	for_each_fw_domain_masked(d, fw_domains, uncore, tmp)
313 		fw_domain_wait_ack_set_fallback(d);
314 
315 	uncore->fw_domains_active |= fw_domains;
316 }
317 
318 static void
fw_domains_put(struct intel_uncore * uncore,enum forcewake_domains fw_domains)319 fw_domains_put(struct intel_uncore *uncore, enum forcewake_domains fw_domains)
320 {
321 	struct intel_uncore_forcewake_domain *d;
322 	unsigned int tmp;
323 
324 	GEM_BUG_ON(fw_domains & ~uncore->fw_domains);
325 
326 	for_each_fw_domain_masked(d, fw_domains, uncore, tmp)
327 		fw_domain_put(d);
328 
329 	uncore->fw_domains_active &= ~fw_domains;
330 }
331 
332 static void
fw_domains_reset(struct intel_uncore * uncore,enum forcewake_domains fw_domains)333 fw_domains_reset(struct intel_uncore *uncore,
334 		 enum forcewake_domains fw_domains)
335 {
336 	struct intel_uncore_forcewake_domain *d;
337 	unsigned int tmp;
338 
339 	if (!fw_domains)
340 		return;
341 
342 	GEM_BUG_ON(fw_domains & ~uncore->fw_domains);
343 
344 	for_each_fw_domain_masked(d, fw_domains, uncore, tmp)
345 		fw_domain_reset(d);
346 }
347 
gt_thread_status(struct intel_uncore * uncore)348 static inline u32 gt_thread_status(struct intel_uncore *uncore)
349 {
350 	u32 val;
351 
352 	val = __raw_uncore_read32(uncore, GEN6_GT_THREAD_STATUS_REG);
353 	val &= GEN6_GT_THREAD_STATUS_CORE_MASK;
354 
355 	return val;
356 }
357 
__gen6_gt_wait_for_thread_c0(struct intel_uncore * uncore)358 static void __gen6_gt_wait_for_thread_c0(struct intel_uncore *uncore)
359 {
360 	/*
361 	 * w/a for a sporadic read returning 0 by waiting for the GT
362 	 * thread to wake up.
363 	 */
364 	drm_WARN_ONCE(&uncore->i915->drm,
365 		      wait_for_atomic_us(gt_thread_status(uncore) == 0, 5000),
366 		      "GT thread status wait timed out\n");
367 }
368 
fw_domains_get_with_thread_status(struct intel_uncore * uncore,enum forcewake_domains fw_domains)369 static void fw_domains_get_with_thread_status(struct intel_uncore *uncore,
370 					      enum forcewake_domains fw_domains)
371 {
372 	fw_domains_get_normal(uncore, fw_domains);
373 
374 	/* WaRsForcewakeWaitTC0:snb,ivb,hsw,bdw,vlv */
375 	__gen6_gt_wait_for_thread_c0(uncore);
376 }
377 
fifo_free_entries(struct intel_uncore * uncore)378 static inline u32 fifo_free_entries(struct intel_uncore *uncore)
379 {
380 	u32 count = __raw_uncore_read32(uncore, GTFIFOCTL);
381 
382 	return count & GT_FIFO_FREE_ENTRIES_MASK;
383 }
384 
__gen6_gt_wait_for_fifo(struct intel_uncore * uncore)385 static void __gen6_gt_wait_for_fifo(struct intel_uncore *uncore)
386 {
387 	u32 n;
388 
389 	/* On VLV, FIFO will be shared by both SW and HW.
390 	 * So, we need to read the FREE_ENTRIES everytime */
391 	if (IS_VALLEYVIEW(uncore->i915))
392 		n = fifo_free_entries(uncore);
393 	else
394 		n = uncore->fifo_count;
395 
396 	if (n <= GT_FIFO_NUM_RESERVED_ENTRIES) {
397 		if (wait_for_atomic((n = fifo_free_entries(uncore)) >
398 				    GT_FIFO_NUM_RESERVED_ENTRIES,
399 				    GT_FIFO_TIMEOUT_MS)) {
400 			drm_dbg(&uncore->i915->drm,
401 				"GT_FIFO timeout, entries: %u\n", n);
402 			return;
403 		}
404 	}
405 
406 	uncore->fifo_count = n - 1;
407 }
408 
409 static enum hrtimer_restart
intel_uncore_fw_release_timer(struct hrtimer * timer)410 intel_uncore_fw_release_timer(struct hrtimer *timer)
411 {
412 	struct intel_uncore_forcewake_domain *domain =
413 	       container_of(timer, struct intel_uncore_forcewake_domain, timer);
414 	struct intel_uncore *uncore = domain->uncore;
415 	unsigned long irqflags;
416 
417 	assert_rpm_device_not_suspended(uncore->rpm);
418 
419 	if (xchg(&domain->active, false))
420 		return HRTIMER_RESTART;
421 
422 	spin_lock_irqsave(&uncore->lock, irqflags);
423 
424 	uncore->fw_domains_timer &= ~domain->mask;
425 
426 	GEM_BUG_ON(!domain->wake_count);
427 	if (--domain->wake_count == 0)
428 		fw_domains_put(uncore, domain->mask);
429 
430 	spin_unlock_irqrestore(&uncore->lock, irqflags);
431 
432 	return HRTIMER_NORESTART;
433 }
434 
435 /* Note callers must have acquired the PUNIT->PMIC bus, before calling this. */
436 static unsigned int
intel_uncore_forcewake_reset(struct intel_uncore * uncore)437 intel_uncore_forcewake_reset(struct intel_uncore *uncore)
438 {
439 	unsigned long irqflags;
440 	struct intel_uncore_forcewake_domain *domain;
441 	int retry_count = 100;
442 	enum forcewake_domains fw, active_domains;
443 
444 	iosf_mbi_assert_punit_acquired();
445 
446 	/* Hold uncore.lock across reset to prevent any register access
447 	 * with forcewake not set correctly. Wait until all pending
448 	 * timers are run before holding.
449 	 */
450 	while (1) {
451 		unsigned int tmp;
452 
453 		active_domains = 0;
454 
455 		for_each_fw_domain(domain, uncore, tmp) {
456 			smp_store_mb(domain->active, false);
457 			if (hrtimer_cancel(&domain->timer) == 0)
458 				continue;
459 
460 			intel_uncore_fw_release_timer(&domain->timer);
461 		}
462 
463 		spin_lock_irqsave(&uncore->lock, irqflags);
464 
465 		for_each_fw_domain(domain, uncore, tmp) {
466 			if (hrtimer_active(&domain->timer))
467 				active_domains |= domain->mask;
468 		}
469 
470 		if (active_domains == 0)
471 			break;
472 
473 		if (--retry_count == 0) {
474 			drm_err(&uncore->i915->drm, "Timed out waiting for forcewake timers to finish\n");
475 			break;
476 		}
477 
478 		spin_unlock_irqrestore(&uncore->lock, irqflags);
479 		cond_resched();
480 	}
481 
482 	drm_WARN_ON(&uncore->i915->drm, active_domains);
483 
484 	fw = uncore->fw_domains_active;
485 	if (fw)
486 		fw_domains_put(uncore, fw);
487 
488 	fw_domains_reset(uncore, uncore->fw_domains);
489 	assert_forcewakes_inactive(uncore);
490 
491 	spin_unlock_irqrestore(&uncore->lock, irqflags);
492 
493 	return fw; /* track the lost user forcewake domains */
494 }
495 
496 static bool
fpga_check_for_unclaimed_mmio(struct intel_uncore * uncore)497 fpga_check_for_unclaimed_mmio(struct intel_uncore *uncore)
498 {
499 	u32 dbg;
500 
501 	dbg = __raw_uncore_read32(uncore, FPGA_DBG);
502 	if (likely(!(dbg & FPGA_DBG_RM_NOCLAIM)))
503 		return false;
504 
505 	/*
506 	 * Bugs in PCI programming (or failing hardware) can occasionally cause
507 	 * us to lose access to the MMIO BAR.  When this happens, register
508 	 * reads will come back with 0xFFFFFFFF for every register and things
509 	 * go bad very quickly.  Let's try to detect that special case and at
510 	 * least try to print a more informative message about what has
511 	 * happened.
512 	 *
513 	 * During normal operation the FPGA_DBG register has several unused
514 	 * bits that will always read back as 0's so we can use them as canaries
515 	 * to recognize when MMIO accesses are just busted.
516 	 */
517 	if (unlikely(dbg == ~0))
518 		drm_err(&uncore->i915->drm,
519 			"Lost access to MMIO BAR; all registers now read back as 0xFFFFFFFF!\n");
520 
521 	__raw_uncore_write32(uncore, FPGA_DBG, FPGA_DBG_RM_NOCLAIM);
522 
523 	return true;
524 }
525 
526 static bool
vlv_check_for_unclaimed_mmio(struct intel_uncore * uncore)527 vlv_check_for_unclaimed_mmio(struct intel_uncore *uncore)
528 {
529 	u32 cer;
530 
531 	cer = __raw_uncore_read32(uncore, CLAIM_ER);
532 	if (likely(!(cer & (CLAIM_ER_OVERFLOW | CLAIM_ER_CTR_MASK))))
533 		return false;
534 
535 	__raw_uncore_write32(uncore, CLAIM_ER, CLAIM_ER_CLR);
536 
537 	return true;
538 }
539 
540 static bool
gen6_check_for_fifo_debug(struct intel_uncore * uncore)541 gen6_check_for_fifo_debug(struct intel_uncore *uncore)
542 {
543 	u32 fifodbg;
544 
545 	fifodbg = __raw_uncore_read32(uncore, GTFIFODBG);
546 
547 	if (unlikely(fifodbg)) {
548 		drm_dbg(&uncore->i915->drm, "GTFIFODBG = 0x08%x\n", fifodbg);
549 		__raw_uncore_write32(uncore, GTFIFODBG, fifodbg);
550 	}
551 
552 	return fifodbg;
553 }
554 
555 static bool
check_for_unclaimed_mmio(struct intel_uncore * uncore)556 check_for_unclaimed_mmio(struct intel_uncore *uncore)
557 {
558 	bool ret = false;
559 
560 	lockdep_assert_held(&uncore->debug->lock);
561 
562 	if (uncore->debug->suspend_count)
563 		return false;
564 
565 	if (intel_uncore_has_fpga_dbg_unclaimed(uncore))
566 		ret |= fpga_check_for_unclaimed_mmio(uncore);
567 
568 	if (intel_uncore_has_dbg_unclaimed(uncore))
569 		ret |= vlv_check_for_unclaimed_mmio(uncore);
570 
571 	if (intel_uncore_has_fifo(uncore))
572 		ret |= gen6_check_for_fifo_debug(uncore);
573 
574 	return ret;
575 }
576 
forcewake_early_sanitize(struct intel_uncore * uncore,unsigned int restore_forcewake)577 static void forcewake_early_sanitize(struct intel_uncore *uncore,
578 				     unsigned int restore_forcewake)
579 {
580 	GEM_BUG_ON(!intel_uncore_has_forcewake(uncore));
581 
582 	/* WaDisableShadowRegForCpd:chv */
583 	if (IS_CHERRYVIEW(uncore->i915)) {
584 		__raw_uncore_write32(uncore, GTFIFOCTL,
585 				     __raw_uncore_read32(uncore, GTFIFOCTL) |
586 				     GT_FIFO_CTL_BLOCK_ALL_POLICY_STALL |
587 				     GT_FIFO_CTL_RC6_POLICY_STALL);
588 	}
589 
590 	iosf_mbi_punit_acquire();
591 	intel_uncore_forcewake_reset(uncore);
592 	if (restore_forcewake) {
593 		spin_lock_irq(&uncore->lock);
594 		fw_domains_get(uncore, restore_forcewake);
595 
596 		if (intel_uncore_has_fifo(uncore))
597 			uncore->fifo_count = fifo_free_entries(uncore);
598 		spin_unlock_irq(&uncore->lock);
599 	}
600 	iosf_mbi_punit_release();
601 }
602 
intel_uncore_suspend(struct intel_uncore * uncore)603 void intel_uncore_suspend(struct intel_uncore *uncore)
604 {
605 	if (!intel_uncore_has_forcewake(uncore))
606 		return;
607 
608 	iosf_mbi_punit_acquire();
609 	iosf_mbi_unregister_pmic_bus_access_notifier_unlocked(
610 		&uncore->pmic_bus_access_nb);
611 	uncore->fw_domains_saved = intel_uncore_forcewake_reset(uncore);
612 	iosf_mbi_punit_release();
613 }
614 
intel_uncore_resume_early(struct intel_uncore * uncore)615 void intel_uncore_resume_early(struct intel_uncore *uncore)
616 {
617 	unsigned int restore_forcewake;
618 
619 	if (intel_uncore_unclaimed_mmio(uncore))
620 		drm_dbg(&uncore->i915->drm, "unclaimed mmio detected on resume, clearing\n");
621 
622 	if (!intel_uncore_has_forcewake(uncore))
623 		return;
624 
625 	restore_forcewake = fetch_and_zero(&uncore->fw_domains_saved);
626 	forcewake_early_sanitize(uncore, restore_forcewake);
627 
628 	iosf_mbi_register_pmic_bus_access_notifier(&uncore->pmic_bus_access_nb);
629 }
630 
intel_uncore_runtime_resume(struct intel_uncore * uncore)631 void intel_uncore_runtime_resume(struct intel_uncore *uncore)
632 {
633 	if (!intel_uncore_has_forcewake(uncore))
634 		return;
635 
636 	iosf_mbi_register_pmic_bus_access_notifier(&uncore->pmic_bus_access_nb);
637 }
638 
__intel_uncore_forcewake_get(struct intel_uncore * uncore,enum forcewake_domains fw_domains)639 static void __intel_uncore_forcewake_get(struct intel_uncore *uncore,
640 					 enum forcewake_domains fw_domains)
641 {
642 	struct intel_uncore_forcewake_domain *domain;
643 	unsigned int tmp;
644 
645 	fw_domains &= uncore->fw_domains;
646 
647 	for_each_fw_domain_masked(domain, fw_domains, uncore, tmp) {
648 		if (domain->wake_count++) {
649 			fw_domains &= ~domain->mask;
650 			domain->active = true;
651 		}
652 	}
653 
654 	if (fw_domains)
655 		fw_domains_get(uncore, fw_domains);
656 }
657 
658 /**
659  * intel_uncore_forcewake_get - grab forcewake domain references
660  * @uncore: the intel_uncore structure
661  * @fw_domains: forcewake domains to get reference on
662  *
663  * This function can be used get GT's forcewake domain references.
664  * Normal register access will handle the forcewake domains automatically.
665  * However if some sequence requires the GT to not power down a particular
666  * forcewake domains this function should be called at the beginning of the
667  * sequence. And subsequently the reference should be dropped by symmetric
668  * call to intel_unforce_forcewake_put(). Usually caller wants all the domains
669  * to be kept awake so the @fw_domains would be then FORCEWAKE_ALL.
670  */
intel_uncore_forcewake_get(struct intel_uncore * uncore,enum forcewake_domains fw_domains)671 void intel_uncore_forcewake_get(struct intel_uncore *uncore,
672 				enum forcewake_domains fw_domains)
673 {
674 	unsigned long irqflags;
675 
676 	if (!uncore->fw_get_funcs)
677 		return;
678 
679 	assert_rpm_wakelock_held(uncore->rpm);
680 
681 	spin_lock_irqsave(&uncore->lock, irqflags);
682 	__intel_uncore_forcewake_get(uncore, fw_domains);
683 	spin_unlock_irqrestore(&uncore->lock, irqflags);
684 }
685 
686 /**
687  * intel_uncore_forcewake_user_get - claim forcewake on behalf of userspace
688  * @uncore: the intel_uncore structure
689  *
690  * This function is a wrapper around intel_uncore_forcewake_get() to acquire
691  * the GT powerwell and in the process disable our debugging for the
692  * duration of userspace's bypass.
693  */
intel_uncore_forcewake_user_get(struct intel_uncore * uncore)694 void intel_uncore_forcewake_user_get(struct intel_uncore *uncore)
695 {
696 	spin_lock_irq(&uncore->lock);
697 	if (!uncore->user_forcewake_count++) {
698 		intel_uncore_forcewake_get__locked(uncore, FORCEWAKE_ALL);
699 		mmio_debug_suspend(uncore);
700 	}
701 	spin_unlock_irq(&uncore->lock);
702 }
703 
704 /**
705  * intel_uncore_forcewake_user_put - release forcewake on behalf of userspace
706  * @uncore: the intel_uncore structure
707  *
708  * This function complements intel_uncore_forcewake_user_get() and releases
709  * the GT powerwell taken on behalf of the userspace bypass.
710  */
intel_uncore_forcewake_user_put(struct intel_uncore * uncore)711 void intel_uncore_forcewake_user_put(struct intel_uncore *uncore)
712 {
713 	spin_lock_irq(&uncore->lock);
714 	if (!--uncore->user_forcewake_count) {
715 		mmio_debug_resume(uncore);
716 		intel_uncore_forcewake_put__locked(uncore, FORCEWAKE_ALL);
717 	}
718 	spin_unlock_irq(&uncore->lock);
719 }
720 
721 /**
722  * intel_uncore_forcewake_get__locked - grab forcewake domain references
723  * @uncore: the intel_uncore structure
724  * @fw_domains: forcewake domains to get reference on
725  *
726  * See intel_uncore_forcewake_get(). This variant places the onus
727  * on the caller to explicitly handle the dev_priv->uncore.lock spinlock.
728  */
intel_uncore_forcewake_get__locked(struct intel_uncore * uncore,enum forcewake_domains fw_domains)729 void intel_uncore_forcewake_get__locked(struct intel_uncore *uncore,
730 					enum forcewake_domains fw_domains)
731 {
732 	lockdep_assert_held(&uncore->lock);
733 
734 	if (!uncore->fw_get_funcs)
735 		return;
736 
737 	__intel_uncore_forcewake_get(uncore, fw_domains);
738 }
739 
__intel_uncore_forcewake_put(struct intel_uncore * uncore,enum forcewake_domains fw_domains,bool delayed)740 static void __intel_uncore_forcewake_put(struct intel_uncore *uncore,
741 					 enum forcewake_domains fw_domains,
742 					 bool delayed)
743 {
744 	struct intel_uncore_forcewake_domain *domain;
745 	unsigned int tmp;
746 
747 	fw_domains &= uncore->fw_domains;
748 
749 	for_each_fw_domain_masked(domain, fw_domains, uncore, tmp) {
750 		GEM_BUG_ON(!domain->wake_count);
751 
752 		if (--domain->wake_count) {
753 			domain->active = true;
754 			continue;
755 		}
756 
757 		if (delayed &&
758 		    !(domain->uncore->fw_domains_timer & domain->mask))
759 			fw_domain_arm_timer(domain);
760 		else
761 			fw_domains_put(uncore, domain->mask);
762 	}
763 }
764 
765 /**
766  * intel_uncore_forcewake_put - release a forcewake domain reference
767  * @uncore: the intel_uncore structure
768  * @fw_domains: forcewake domains to put references
769  *
770  * This function drops the device-level forcewakes for specified
771  * domains obtained by intel_uncore_forcewake_get().
772  */
intel_uncore_forcewake_put(struct intel_uncore * uncore,enum forcewake_domains fw_domains)773 void intel_uncore_forcewake_put(struct intel_uncore *uncore,
774 				enum forcewake_domains fw_domains)
775 {
776 	unsigned long irqflags;
777 
778 	if (!uncore->fw_get_funcs)
779 		return;
780 
781 	spin_lock_irqsave(&uncore->lock, irqflags);
782 	__intel_uncore_forcewake_put(uncore, fw_domains, false);
783 	spin_unlock_irqrestore(&uncore->lock, irqflags);
784 }
785 
intel_uncore_forcewake_put_delayed(struct intel_uncore * uncore,enum forcewake_domains fw_domains)786 void intel_uncore_forcewake_put_delayed(struct intel_uncore *uncore,
787 					enum forcewake_domains fw_domains)
788 {
789 	unsigned long irqflags;
790 
791 	if (!uncore->fw_get_funcs)
792 		return;
793 
794 	spin_lock_irqsave(&uncore->lock, irqflags);
795 	__intel_uncore_forcewake_put(uncore, fw_domains, true);
796 	spin_unlock_irqrestore(&uncore->lock, irqflags);
797 }
798 
799 /**
800  * intel_uncore_forcewake_flush - flush the delayed release
801  * @uncore: the intel_uncore structure
802  * @fw_domains: forcewake domains to flush
803  */
intel_uncore_forcewake_flush(struct intel_uncore * uncore,enum forcewake_domains fw_domains)804 void intel_uncore_forcewake_flush(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 (!uncore->fw_get_funcs)
811 		return;
812 
813 	fw_domains &= uncore->fw_domains;
814 	for_each_fw_domain_masked(domain, fw_domains, uncore, tmp) {
815 		WRITE_ONCE(domain->active, false);
816 		if (hrtimer_cancel(&domain->timer))
817 			intel_uncore_fw_release_timer(&domain->timer);
818 	}
819 }
820 
821 /**
822  * intel_uncore_forcewake_put__locked - grab forcewake domain references
823  * @uncore: the intel_uncore structure
824  * @fw_domains: forcewake domains to get reference on
825  *
826  * See intel_uncore_forcewake_put(). This variant places the onus
827  * on the caller to explicitly handle the dev_priv->uncore.lock spinlock.
828  */
intel_uncore_forcewake_put__locked(struct intel_uncore * uncore,enum forcewake_domains fw_domains)829 void intel_uncore_forcewake_put__locked(struct intel_uncore *uncore,
830 					enum forcewake_domains fw_domains)
831 {
832 	lockdep_assert_held(&uncore->lock);
833 
834 	if (!uncore->fw_get_funcs)
835 		return;
836 
837 	__intel_uncore_forcewake_put(uncore, fw_domains, false);
838 }
839 
assert_forcewakes_inactive(struct intel_uncore * uncore)840 void assert_forcewakes_inactive(struct intel_uncore *uncore)
841 {
842 	if (!uncore->fw_get_funcs)
843 		return;
844 
845 	drm_WARN(&uncore->i915->drm, uncore->fw_domains_active,
846 		 "Expected all fw_domains to be inactive, but %08x are still on\n",
847 		 uncore->fw_domains_active);
848 }
849 
assert_forcewakes_active(struct intel_uncore * uncore,enum forcewake_domains fw_domains)850 void assert_forcewakes_active(struct intel_uncore *uncore,
851 			      enum forcewake_domains fw_domains)
852 {
853 	struct intel_uncore_forcewake_domain *domain;
854 	unsigned int tmp;
855 
856 	if (!IS_ENABLED(CONFIG_DRM_I915_DEBUG_RUNTIME_PM))
857 		return;
858 
859 	if (!uncore->fw_get_funcs)
860 		return;
861 
862 	spin_lock_irq(&uncore->lock);
863 
864 	assert_rpm_wakelock_held(uncore->rpm);
865 
866 	fw_domains &= uncore->fw_domains;
867 	drm_WARN(&uncore->i915->drm, fw_domains & ~uncore->fw_domains_active,
868 		 "Expected %08x fw_domains to be active, but %08x are off\n",
869 		 fw_domains, fw_domains & ~uncore->fw_domains_active);
870 
871 	/*
872 	 * Check that the caller has an explicit wakeref and we don't mistake
873 	 * it for the auto wakeref.
874 	 */
875 	for_each_fw_domain_masked(domain, fw_domains, uncore, tmp) {
876 		unsigned int actual = READ_ONCE(domain->wake_count);
877 		unsigned int expect = 1;
878 
879 		if (uncore->fw_domains_timer & domain->mask)
880 			expect++; /* pending automatic release */
881 
882 		if (drm_WARN(&uncore->i915->drm, actual < expect,
883 			     "Expected domain %d to be held awake by caller, count=%d\n",
884 			     domain->id, actual))
885 			break;
886 	}
887 
888 	spin_unlock_irq(&uncore->lock);
889 }
890 
891 /* We give fast paths for the really cool registers */
892 #define NEEDS_FORCE_WAKE(reg) ({ \
893 	u32 __reg = (reg); \
894 	__reg < 0x40000 || __reg >= GEN11_BSD_RING_BASE; \
895 })
896 
fw_range_cmp(u32 offset,const struct intel_forcewake_range * entry)897 static int fw_range_cmp(u32 offset, const struct intel_forcewake_range *entry)
898 {
899 	if (offset < entry->start)
900 		return -1;
901 	else if (offset > entry->end)
902 		return 1;
903 	else
904 		return 0;
905 }
906 
907 /* Copied and "macroized" from lib/bsearch.c */
908 #define BSEARCH(key, base, num, cmp) ({                                 \
909 	unsigned int start__ = 0, end__ = (num);                        \
910 	typeof(base) result__ = NULL;                                   \
911 	while (start__ < end__) {                                       \
912 		unsigned int mid__ = start__ + (end__ - start__) / 2;   \
913 		int ret__ = (cmp)((key), (base) + mid__);               \
914 		if (ret__ < 0) {                                        \
915 			end__ = mid__;                                  \
916 		} else if (ret__ > 0) {                                 \
917 			start__ = mid__ + 1;                            \
918 		} else {                                                \
919 			result__ = (base) + mid__;                      \
920 			break;                                          \
921 		}                                                       \
922 	}                                                               \
923 	result__;                                                       \
924 })
925 
926 static enum forcewake_domains
find_fw_domain(struct intel_uncore * uncore,u32 offset)927 find_fw_domain(struct intel_uncore *uncore, u32 offset)
928 {
929 	const struct intel_forcewake_range *entry;
930 
931 	if (IS_GSI_REG(offset))
932 		offset += uncore->gsi_offset;
933 
934 	entry = BSEARCH(offset,
935 			uncore->fw_domains_table,
936 			uncore->fw_domains_table_entries,
937 			fw_range_cmp);
938 
939 	if (!entry)
940 		return 0;
941 
942 	/*
943 	 * The list of FW domains depends on the SKU in gen11+ so we
944 	 * can't determine it statically. We use FORCEWAKE_ALL and
945 	 * translate it here to the list of available domains.
946 	 */
947 	if (entry->domains == FORCEWAKE_ALL)
948 		return uncore->fw_domains;
949 
950 	drm_WARN(&uncore->i915->drm, entry->domains & ~uncore->fw_domains,
951 		 "Uninitialized forcewake domain(s) 0x%x accessed at 0x%x\n",
952 		 entry->domains & ~uncore->fw_domains, offset);
953 
954 	return entry->domains;
955 }
956 
957 /*
958  * Shadowed register tables describe special register ranges that i915 is
959  * allowed to write to without acquiring forcewake.  If these registers' power
960  * wells are down, the hardware will save values written by i915 to a shadow
961  * copy and automatically transfer them into the real register the next time
962  * the power well is woken up.  Shadowing only applies to writes; forcewake
963  * must still be acquired when reading from registers in these ranges.
964  *
965  * The documentation for shadowed registers is somewhat spotty on older
966  * platforms.  However missing registers from these lists is non-fatal; it just
967  * means we'll wake up the hardware for some register accesses where we didn't
968  * really need to.
969  *
970  * The ranges listed in these tables must be sorted by offset.
971  *
972  * When adding new tables here, please also add them to
973  * intel_shadow_table_check() in selftests/intel_uncore.c so that they will be
974  * scanned for obvious mistakes or typos by the selftests.
975  */
976 
977 static const struct i915_range gen8_shadowed_regs[] = {
978 	{ .start =  0x2030, .end =  0x2030 },
979 	{ .start =  0xA008, .end =  0xA00C },
980 	{ .start = 0x12030, .end = 0x12030 },
981 	{ .start = 0x1a030, .end = 0x1a030 },
982 	{ .start = 0x22030, .end = 0x22030 },
983 };
984 
985 static const struct i915_range gen11_shadowed_regs[] = {
986 	{ .start =   0x2030, .end =   0x2030 },
987 	{ .start =   0x2550, .end =   0x2550 },
988 	{ .start =   0xA008, .end =   0xA00C },
989 	{ .start =  0x22030, .end =  0x22030 },
990 	{ .start =  0x22230, .end =  0x22230 },
991 	{ .start =  0x22510, .end =  0x22550 },
992 	{ .start = 0x1C0030, .end = 0x1C0030 },
993 	{ .start = 0x1C0230, .end = 0x1C0230 },
994 	{ .start = 0x1C0510, .end = 0x1C0550 },
995 	{ .start = 0x1C4030, .end = 0x1C4030 },
996 	{ .start = 0x1C4230, .end = 0x1C4230 },
997 	{ .start = 0x1C4510, .end = 0x1C4550 },
998 	{ .start = 0x1C8030, .end = 0x1C8030 },
999 	{ .start = 0x1C8230, .end = 0x1C8230 },
1000 	{ .start = 0x1C8510, .end = 0x1C8550 },
1001 	{ .start = 0x1D0030, .end = 0x1D0030 },
1002 	{ .start = 0x1D0230, .end = 0x1D0230 },
1003 	{ .start = 0x1D0510, .end = 0x1D0550 },
1004 	{ .start = 0x1D4030, .end = 0x1D4030 },
1005 	{ .start = 0x1D4230, .end = 0x1D4230 },
1006 	{ .start = 0x1D4510, .end = 0x1D4550 },
1007 	{ .start = 0x1D8030, .end = 0x1D8030 },
1008 	{ .start = 0x1D8230, .end = 0x1D8230 },
1009 	{ .start = 0x1D8510, .end = 0x1D8550 },
1010 };
1011 
1012 static const struct i915_range gen12_shadowed_regs[] = {
1013 	{ .start =   0x2030, .end =   0x2030 },
1014 	{ .start =   0x2510, .end =   0x2550 },
1015 	{ .start =   0xA008, .end =   0xA00C },
1016 	{ .start =   0xA188, .end =   0xA188 },
1017 	{ .start =   0xA278, .end =   0xA278 },
1018 	{ .start =   0xA540, .end =   0xA56C },
1019 	{ .start =   0xC4C8, .end =   0xC4C8 },
1020 	{ .start =   0xC4D4, .end =   0xC4D4 },
1021 	{ .start =   0xC600, .end =   0xC600 },
1022 	{ .start =  0x22030, .end =  0x22030 },
1023 	{ .start =  0x22510, .end =  0x22550 },
1024 	{ .start = 0x1C0030, .end = 0x1C0030 },
1025 	{ .start = 0x1C0510, .end = 0x1C0550 },
1026 	{ .start = 0x1C4030, .end = 0x1C4030 },
1027 	{ .start = 0x1C4510, .end = 0x1C4550 },
1028 	{ .start = 0x1C8030, .end = 0x1C8030 },
1029 	{ .start = 0x1C8510, .end = 0x1C8550 },
1030 	{ .start = 0x1D0030, .end = 0x1D0030 },
1031 	{ .start = 0x1D0510, .end = 0x1D0550 },
1032 	{ .start = 0x1D4030, .end = 0x1D4030 },
1033 	{ .start = 0x1D4510, .end = 0x1D4550 },
1034 	{ .start = 0x1D8030, .end = 0x1D8030 },
1035 	{ .start = 0x1D8510, .end = 0x1D8550 },
1036 
1037 	/*
1038 	 * The rest of these ranges are specific to Xe_HP and beyond, but
1039 	 * are reserved/unused ranges on earlier gen12 platforms, so they can
1040 	 * be safely added to the gen12 table.
1041 	 */
1042 	{ .start = 0x1E0030, .end = 0x1E0030 },
1043 	{ .start = 0x1E0510, .end = 0x1E0550 },
1044 	{ .start = 0x1E4030, .end = 0x1E4030 },
1045 	{ .start = 0x1E4510, .end = 0x1E4550 },
1046 	{ .start = 0x1E8030, .end = 0x1E8030 },
1047 	{ .start = 0x1E8510, .end = 0x1E8550 },
1048 	{ .start = 0x1F0030, .end = 0x1F0030 },
1049 	{ .start = 0x1F0510, .end = 0x1F0550 },
1050 	{ .start = 0x1F4030, .end = 0x1F4030 },
1051 	{ .start = 0x1F4510, .end = 0x1F4550 },
1052 	{ .start = 0x1F8030, .end = 0x1F8030 },
1053 	{ .start = 0x1F8510, .end = 0x1F8550 },
1054 };
1055 
1056 static const struct i915_range dg2_shadowed_regs[] = {
1057 	{ .start =   0x2030, .end =   0x2030 },
1058 	{ .start =   0x2510, .end =   0x2550 },
1059 	{ .start =   0xA008, .end =   0xA00C },
1060 	{ .start =   0xA188, .end =   0xA188 },
1061 	{ .start =   0xA278, .end =   0xA278 },
1062 	{ .start =   0xA540, .end =   0xA56C },
1063 	{ .start =   0xC4C8, .end =   0xC4C8 },
1064 	{ .start =   0xC4E0, .end =   0xC4E0 },
1065 	{ .start =   0xC600, .end =   0xC600 },
1066 	{ .start =   0xC658, .end =   0xC658 },
1067 	{ .start =  0x22030, .end =  0x22030 },
1068 	{ .start =  0x22510, .end =  0x22550 },
1069 	{ .start = 0x1C0030, .end = 0x1C0030 },
1070 	{ .start = 0x1C0510, .end = 0x1C0550 },
1071 	{ .start = 0x1C4030, .end = 0x1C4030 },
1072 	{ .start = 0x1C4510, .end = 0x1C4550 },
1073 	{ .start = 0x1C8030, .end = 0x1C8030 },
1074 	{ .start = 0x1C8510, .end = 0x1C8550 },
1075 	{ .start = 0x1D0030, .end = 0x1D0030 },
1076 	{ .start = 0x1D0510, .end = 0x1D0550 },
1077 	{ .start = 0x1D4030, .end = 0x1D4030 },
1078 	{ .start = 0x1D4510, .end = 0x1D4550 },
1079 	{ .start = 0x1D8030, .end = 0x1D8030 },
1080 	{ .start = 0x1D8510, .end = 0x1D8550 },
1081 	{ .start = 0x1E0030, .end = 0x1E0030 },
1082 	{ .start = 0x1E0510, .end = 0x1E0550 },
1083 	{ .start = 0x1E4030, .end = 0x1E4030 },
1084 	{ .start = 0x1E4510, .end = 0x1E4550 },
1085 	{ .start = 0x1E8030, .end = 0x1E8030 },
1086 	{ .start = 0x1E8510, .end = 0x1E8550 },
1087 	{ .start = 0x1F0030, .end = 0x1F0030 },
1088 	{ .start = 0x1F0510, .end = 0x1F0550 },
1089 	{ .start = 0x1F4030, .end = 0x1F4030 },
1090 	{ .start = 0x1F4510, .end = 0x1F4550 },
1091 	{ .start = 0x1F8030, .end = 0x1F8030 },
1092 	{ .start = 0x1F8510, .end = 0x1F8550 },
1093 };
1094 
1095 static const struct i915_range pvc_shadowed_regs[] = {
1096 	{ .start =   0x2030, .end =   0x2030 },
1097 	{ .start =   0x2510, .end =   0x2550 },
1098 	{ .start =   0xA008, .end =   0xA00C },
1099 	{ .start =   0xA188, .end =   0xA188 },
1100 	{ .start =   0xA278, .end =   0xA278 },
1101 	{ .start =   0xA540, .end =   0xA56C },
1102 	{ .start =   0xC4C8, .end =   0xC4C8 },
1103 	{ .start =   0xC4E0, .end =   0xC4E0 },
1104 	{ .start =   0xC600, .end =   0xC600 },
1105 	{ .start =   0xC658, .end =   0xC658 },
1106 	{ .start =  0x22030, .end =  0x22030 },
1107 	{ .start =  0x22510, .end =  0x22550 },
1108 	{ .start = 0x1C0030, .end = 0x1C0030 },
1109 	{ .start = 0x1C0510, .end = 0x1C0550 },
1110 	{ .start = 0x1C4030, .end = 0x1C4030 },
1111 	{ .start = 0x1C4510, .end = 0x1C4550 },
1112 	{ .start = 0x1C8030, .end = 0x1C8030 },
1113 	{ .start = 0x1C8510, .end = 0x1C8550 },
1114 	{ .start = 0x1D0030, .end = 0x1D0030 },
1115 	{ .start = 0x1D0510, .end = 0x1D0550 },
1116 	{ .start = 0x1D4030, .end = 0x1D4030 },
1117 	{ .start = 0x1D4510, .end = 0x1D4550 },
1118 	{ .start = 0x1D8030, .end = 0x1D8030 },
1119 	{ .start = 0x1D8510, .end = 0x1D8550 },
1120 	{ .start = 0x1E0030, .end = 0x1E0030 },
1121 	{ .start = 0x1E0510, .end = 0x1E0550 },
1122 	{ .start = 0x1E4030, .end = 0x1E4030 },
1123 	{ .start = 0x1E4510, .end = 0x1E4550 },
1124 	{ .start = 0x1E8030, .end = 0x1E8030 },
1125 	{ .start = 0x1E8510, .end = 0x1E8550 },
1126 	{ .start = 0x1F0030, .end = 0x1F0030 },
1127 	{ .start = 0x1F0510, .end = 0x1F0550 },
1128 	{ .start = 0x1F4030, .end = 0x1F4030 },
1129 	{ .start = 0x1F4510, .end = 0x1F4550 },
1130 	{ .start = 0x1F8030, .end = 0x1F8030 },
1131 	{ .start = 0x1F8510, .end = 0x1F8550 },
1132 };
1133 
mmio_range_cmp(u32 key,const struct i915_range * range)1134 static int mmio_range_cmp(u32 key, const struct i915_range *range)
1135 {
1136 	if (key < range->start)
1137 		return -1;
1138 	else if (key > range->end)
1139 		return 1;
1140 	else
1141 		return 0;
1142 }
1143 
is_shadowed(struct intel_uncore * uncore,u32 offset)1144 static bool is_shadowed(struct intel_uncore *uncore, u32 offset)
1145 {
1146 	if (drm_WARN_ON(&uncore->i915->drm, !uncore->shadowed_reg_table))
1147 		return false;
1148 
1149 	if (IS_GSI_REG(offset))
1150 		offset += uncore->gsi_offset;
1151 
1152 	return BSEARCH(offset,
1153 		       uncore->shadowed_reg_table,
1154 		       uncore->shadowed_reg_table_entries,
1155 		       mmio_range_cmp);
1156 }
1157 
1158 static enum forcewake_domains
gen6_reg_write_fw_domains(struct intel_uncore * uncore,i915_reg_t reg)1159 gen6_reg_write_fw_domains(struct intel_uncore *uncore, i915_reg_t reg)
1160 {
1161 	return FORCEWAKE_RENDER;
1162 }
1163 
1164 #define __fwtable_reg_read_fw_domains(uncore, offset) \
1165 ({ \
1166 	enum forcewake_domains __fwd = 0; \
1167 	if (NEEDS_FORCE_WAKE((offset))) \
1168 		__fwd = find_fw_domain(uncore, offset); \
1169 	__fwd; \
1170 })
1171 
1172 #define __fwtable_reg_write_fw_domains(uncore, offset) \
1173 ({ \
1174 	enum forcewake_domains __fwd = 0; \
1175 	const u32 __offset = (offset); \
1176 	if (NEEDS_FORCE_WAKE((__offset)) && !is_shadowed(uncore, __offset)) \
1177 		__fwd = find_fw_domain(uncore, __offset); \
1178 	__fwd; \
1179 })
1180 
1181 #define GEN_FW_RANGE(s, e, d) \
1182 	{ .start = (s), .end = (e), .domains = (d) }
1183 
1184 /*
1185  * All platforms' forcewake tables below must be sorted by offset ranges.
1186  * Furthermore, new forcewake tables added should be "watertight" and have
1187  * no gaps between ranges.
1188  *
1189  * When there are multiple consecutive ranges listed in the bspec with
1190  * the same forcewake domain, it is customary to combine them into a single
1191  * row in the tables below to keep the tables small and lookups fast.
1192  * Likewise, reserved/unused ranges may be combined with the preceding and/or
1193  * following ranges since the driver will never be making MMIO accesses in
1194  * those ranges.
1195  *
1196  * For example, if the bspec were to list:
1197  *
1198  *    ...
1199  *    0x1000 - 0x1fff:  GT
1200  *    0x2000 - 0x2cff:  GT
1201  *    0x2d00 - 0x2fff:  unused/reserved
1202  *    0x3000 - 0xffff:  GT
1203  *    ...
1204  *
1205  * these could all be represented by a single line in the code:
1206  *
1207  *   GEN_FW_RANGE(0x1000, 0xffff, FORCEWAKE_GT)
1208  *
1209  * When adding new forcewake tables here, please also add them to
1210  * intel_uncore_mock_selftests in selftests/intel_uncore.c so that they will be
1211  * scanned for obvious mistakes or typos by the selftests.
1212  */
1213 
1214 static const struct intel_forcewake_range __gen6_fw_ranges[] = {
1215 	GEN_FW_RANGE(0x0, 0x3ffff, FORCEWAKE_RENDER),
1216 };
1217 
1218 static const struct intel_forcewake_range __vlv_fw_ranges[] = {
1219 	GEN_FW_RANGE(0x2000, 0x3fff, FORCEWAKE_RENDER),
1220 	GEN_FW_RANGE(0x5000, 0x7fff, FORCEWAKE_RENDER),
1221 	GEN_FW_RANGE(0xb000, 0x11fff, FORCEWAKE_RENDER),
1222 	GEN_FW_RANGE(0x12000, 0x13fff, FORCEWAKE_MEDIA),
1223 	GEN_FW_RANGE(0x22000, 0x23fff, FORCEWAKE_MEDIA),
1224 	GEN_FW_RANGE(0x2e000, 0x2ffff, FORCEWAKE_RENDER),
1225 	GEN_FW_RANGE(0x30000, 0x3ffff, FORCEWAKE_MEDIA),
1226 };
1227 
1228 static const struct intel_forcewake_range __chv_fw_ranges[] = {
1229 	GEN_FW_RANGE(0x2000, 0x3fff, FORCEWAKE_RENDER),
1230 	GEN_FW_RANGE(0x4000, 0x4fff, FORCEWAKE_RENDER | FORCEWAKE_MEDIA),
1231 	GEN_FW_RANGE(0x5200, 0x7fff, FORCEWAKE_RENDER),
1232 	GEN_FW_RANGE(0x8000, 0x82ff, FORCEWAKE_RENDER | FORCEWAKE_MEDIA),
1233 	GEN_FW_RANGE(0x8300, 0x84ff, FORCEWAKE_RENDER),
1234 	GEN_FW_RANGE(0x8500, 0x85ff, FORCEWAKE_RENDER | FORCEWAKE_MEDIA),
1235 	GEN_FW_RANGE(0x8800, 0x88ff, FORCEWAKE_MEDIA),
1236 	GEN_FW_RANGE(0x9000, 0xafff, FORCEWAKE_RENDER | FORCEWAKE_MEDIA),
1237 	GEN_FW_RANGE(0xb000, 0xb47f, FORCEWAKE_RENDER),
1238 	GEN_FW_RANGE(0xd000, 0xd7ff, FORCEWAKE_MEDIA),
1239 	GEN_FW_RANGE(0xe000, 0xe7ff, FORCEWAKE_RENDER),
1240 	GEN_FW_RANGE(0xf000, 0xffff, FORCEWAKE_RENDER | FORCEWAKE_MEDIA),
1241 	GEN_FW_RANGE(0x12000, 0x13fff, FORCEWAKE_MEDIA),
1242 	GEN_FW_RANGE(0x1a000, 0x1bfff, FORCEWAKE_MEDIA),
1243 	GEN_FW_RANGE(0x1e800, 0x1e9ff, FORCEWAKE_MEDIA),
1244 	GEN_FW_RANGE(0x30000, 0x37fff, FORCEWAKE_MEDIA),
1245 };
1246 
1247 static const struct intel_forcewake_range __gen9_fw_ranges[] = {
1248 	GEN_FW_RANGE(0x0, 0xaff, FORCEWAKE_GT),
1249 	GEN_FW_RANGE(0xb00, 0x1fff, 0), /* uncore range */
1250 	GEN_FW_RANGE(0x2000, 0x26ff, FORCEWAKE_RENDER),
1251 	GEN_FW_RANGE(0x2700, 0x2fff, FORCEWAKE_GT),
1252 	GEN_FW_RANGE(0x3000, 0x3fff, FORCEWAKE_RENDER),
1253 	GEN_FW_RANGE(0x4000, 0x51ff, FORCEWAKE_GT),
1254 	GEN_FW_RANGE(0x5200, 0x7fff, FORCEWAKE_RENDER),
1255 	GEN_FW_RANGE(0x8000, 0x812f, FORCEWAKE_GT),
1256 	GEN_FW_RANGE(0x8130, 0x813f, FORCEWAKE_MEDIA),
1257 	GEN_FW_RANGE(0x8140, 0x815f, FORCEWAKE_RENDER),
1258 	GEN_FW_RANGE(0x8160, 0x82ff, FORCEWAKE_GT),
1259 	GEN_FW_RANGE(0x8300, 0x84ff, FORCEWAKE_RENDER),
1260 	GEN_FW_RANGE(0x8500, 0x87ff, FORCEWAKE_GT),
1261 	GEN_FW_RANGE(0x8800, 0x89ff, FORCEWAKE_MEDIA),
1262 	GEN_FW_RANGE(0x8a00, 0x8bff, FORCEWAKE_GT),
1263 	GEN_FW_RANGE(0x8c00, 0x8cff, FORCEWAKE_RENDER),
1264 	GEN_FW_RANGE(0x8d00, 0x93ff, FORCEWAKE_GT),
1265 	GEN_FW_RANGE(0x9400, 0x97ff, FORCEWAKE_RENDER | FORCEWAKE_MEDIA),
1266 	GEN_FW_RANGE(0x9800, 0xafff, FORCEWAKE_GT),
1267 	GEN_FW_RANGE(0xb000, 0xb47f, FORCEWAKE_RENDER),
1268 	GEN_FW_RANGE(0xb480, 0xcfff, FORCEWAKE_GT),
1269 	GEN_FW_RANGE(0xd000, 0xd7ff, FORCEWAKE_MEDIA),
1270 	GEN_FW_RANGE(0xd800, 0xdfff, FORCEWAKE_GT),
1271 	GEN_FW_RANGE(0xe000, 0xe8ff, FORCEWAKE_RENDER),
1272 	GEN_FW_RANGE(0xe900, 0x11fff, FORCEWAKE_GT),
1273 	GEN_FW_RANGE(0x12000, 0x13fff, FORCEWAKE_MEDIA),
1274 	GEN_FW_RANGE(0x14000, 0x19fff, FORCEWAKE_GT),
1275 	GEN_FW_RANGE(0x1a000, 0x1e9ff, FORCEWAKE_MEDIA),
1276 	GEN_FW_RANGE(0x1ea00, 0x243ff, FORCEWAKE_GT),
1277 	GEN_FW_RANGE(0x24400, 0x247ff, FORCEWAKE_RENDER),
1278 	GEN_FW_RANGE(0x24800, 0x2ffff, FORCEWAKE_GT),
1279 	GEN_FW_RANGE(0x30000, 0x3ffff, FORCEWAKE_MEDIA),
1280 };
1281 
1282 static const struct intel_forcewake_range __gen11_fw_ranges[] = {
1283 	GEN_FW_RANGE(0x0, 0x1fff, 0), /* uncore range */
1284 	GEN_FW_RANGE(0x2000, 0x26ff, FORCEWAKE_RENDER),
1285 	GEN_FW_RANGE(0x2700, 0x2fff, FORCEWAKE_GT),
1286 	GEN_FW_RANGE(0x3000, 0x3fff, FORCEWAKE_RENDER),
1287 	GEN_FW_RANGE(0x4000, 0x51ff, FORCEWAKE_GT),
1288 	GEN_FW_RANGE(0x5200, 0x7fff, FORCEWAKE_RENDER),
1289 	GEN_FW_RANGE(0x8000, 0x813f, FORCEWAKE_GT),
1290 	GEN_FW_RANGE(0x8140, 0x815f, FORCEWAKE_RENDER),
1291 	GEN_FW_RANGE(0x8160, 0x82ff, FORCEWAKE_GT),
1292 	GEN_FW_RANGE(0x8300, 0x84ff, FORCEWAKE_RENDER),
1293 	GEN_FW_RANGE(0x8500, 0x87ff, FORCEWAKE_GT),
1294 	GEN_FW_RANGE(0x8800, 0x8bff, 0),
1295 	GEN_FW_RANGE(0x8c00, 0x8cff, FORCEWAKE_RENDER),
1296 	GEN_FW_RANGE(0x8d00, 0x94cf, FORCEWAKE_GT),
1297 	GEN_FW_RANGE(0x94d0, 0x955f, FORCEWAKE_RENDER),
1298 	GEN_FW_RANGE(0x9560, 0x95ff, 0),
1299 	GEN_FW_RANGE(0x9600, 0xafff, FORCEWAKE_GT),
1300 	GEN_FW_RANGE(0xb000, 0xb47f, FORCEWAKE_RENDER),
1301 	GEN_FW_RANGE(0xb480, 0xdeff, FORCEWAKE_GT),
1302 	GEN_FW_RANGE(0xdf00, 0xe8ff, FORCEWAKE_RENDER),
1303 	GEN_FW_RANGE(0xe900, 0x16dff, FORCEWAKE_GT),
1304 	GEN_FW_RANGE(0x16e00, 0x19fff, FORCEWAKE_RENDER),
1305 	GEN_FW_RANGE(0x1a000, 0x23fff, FORCEWAKE_GT),
1306 	GEN_FW_RANGE(0x24000, 0x2407f, 0),
1307 	GEN_FW_RANGE(0x24080, 0x2417f, FORCEWAKE_GT),
1308 	GEN_FW_RANGE(0x24180, 0x242ff, FORCEWAKE_RENDER),
1309 	GEN_FW_RANGE(0x24300, 0x243ff, FORCEWAKE_GT),
1310 	GEN_FW_RANGE(0x24400, 0x24fff, FORCEWAKE_RENDER),
1311 	GEN_FW_RANGE(0x25000, 0x3ffff, FORCEWAKE_GT),
1312 	GEN_FW_RANGE(0x40000, 0x1bffff, 0),
1313 	GEN_FW_RANGE(0x1c0000, 0x1c3fff, FORCEWAKE_MEDIA_VDBOX0),
1314 	GEN_FW_RANGE(0x1c4000, 0x1c7fff, 0),
1315 	GEN_FW_RANGE(0x1c8000, 0x1cffff, FORCEWAKE_MEDIA_VEBOX0),
1316 	GEN_FW_RANGE(0x1d0000, 0x1d3fff, FORCEWAKE_MEDIA_VDBOX2),
1317 	GEN_FW_RANGE(0x1d4000, 0x1dbfff, 0)
1318 };
1319 
1320 static const struct intel_forcewake_range __gen12_fw_ranges[] = {
1321 	GEN_FW_RANGE(0x0, 0x1fff, 0), /*
1322 		0x0   -  0xaff: reserved
1323 		0xb00 - 0x1fff: always on */
1324 	GEN_FW_RANGE(0x2000, 0x26ff, FORCEWAKE_RENDER),
1325 	GEN_FW_RANGE(0x2700, 0x27ff, FORCEWAKE_GT),
1326 	GEN_FW_RANGE(0x2800, 0x2aff, FORCEWAKE_RENDER),
1327 	GEN_FW_RANGE(0x2b00, 0x2fff, FORCEWAKE_GT),
1328 	GEN_FW_RANGE(0x3000, 0x3fff, FORCEWAKE_RENDER),
1329 	GEN_FW_RANGE(0x4000, 0x51ff, FORCEWAKE_GT), /*
1330 		0x4000 - 0x48ff: gt
1331 		0x4900 - 0x51ff: reserved */
1332 	GEN_FW_RANGE(0x5200, 0x7fff, FORCEWAKE_RENDER), /*
1333 		0x5200 - 0x53ff: render
1334 		0x5400 - 0x54ff: reserved
1335 		0x5500 - 0x7fff: render */
1336 	GEN_FW_RANGE(0x8000, 0x813f, FORCEWAKE_GT),
1337 	GEN_FW_RANGE(0x8140, 0x815f, FORCEWAKE_RENDER),
1338 	GEN_FW_RANGE(0x8160, 0x81ff, 0), /*
1339 		0x8160 - 0x817f: reserved
1340 		0x8180 - 0x81ff: always on */
1341 	GEN_FW_RANGE(0x8200, 0x82ff, FORCEWAKE_GT),
1342 	GEN_FW_RANGE(0x8300, 0x84ff, FORCEWAKE_RENDER),
1343 	GEN_FW_RANGE(0x8500, 0x94cf, FORCEWAKE_GT), /*
1344 		0x8500 - 0x87ff: gt
1345 		0x8800 - 0x8fff: reserved
1346 		0x9000 - 0x947f: gt
1347 		0x9480 - 0x94cf: reserved */
1348 	GEN_FW_RANGE(0x94d0, 0x955f, FORCEWAKE_RENDER),
1349 	GEN_FW_RANGE(0x9560, 0x97ff, 0), /*
1350 		0x9560 - 0x95ff: always on
1351 		0x9600 - 0x97ff: reserved */
1352 	GEN_FW_RANGE(0x9800, 0xafff, FORCEWAKE_GT),
1353 	GEN_FW_RANGE(0xb000, 0xb3ff, FORCEWAKE_RENDER),
1354 	GEN_FW_RANGE(0xb400, 0xcfff, FORCEWAKE_GT), /*
1355 		0xb400 - 0xbf7f: gt
1356 		0xb480 - 0xbfff: reserved
1357 		0xc000 - 0xcfff: gt */
1358 	GEN_FW_RANGE(0xd000, 0xd7ff, 0),
1359 	GEN_FW_RANGE(0xd800, 0xd8ff, FORCEWAKE_RENDER),
1360 	GEN_FW_RANGE(0xd900, 0xdbff, FORCEWAKE_GT),
1361 	GEN_FW_RANGE(0xdc00, 0xefff, FORCEWAKE_RENDER), /*
1362 		0xdc00 - 0xddff: render
1363 		0xde00 - 0xde7f: reserved
1364 		0xde80 - 0xe8ff: render
1365 		0xe900 - 0xefff: reserved */
1366 	GEN_FW_RANGE(0xf000, 0x147ff, FORCEWAKE_GT), /*
1367 		 0xf000 - 0xffff: gt
1368 		0x10000 - 0x147ff: reserved */
1369 	GEN_FW_RANGE(0x14800, 0x1ffff, FORCEWAKE_RENDER), /*
1370 		0x14800 - 0x14fff: render
1371 		0x15000 - 0x16dff: reserved
1372 		0x16e00 - 0x1bfff: render
1373 		0x1c000 - 0x1ffff: reserved */
1374 	GEN_FW_RANGE(0x20000, 0x20fff, FORCEWAKE_MEDIA_VDBOX0),
1375 	GEN_FW_RANGE(0x21000, 0x21fff, FORCEWAKE_MEDIA_VDBOX2),
1376 	GEN_FW_RANGE(0x22000, 0x23fff, FORCEWAKE_GT),
1377 	GEN_FW_RANGE(0x24000, 0x2417f, 0), /*
1378 		0x24000 - 0x2407f: always on
1379 		0x24080 - 0x2417f: reserved */
1380 	GEN_FW_RANGE(0x24180, 0x249ff, FORCEWAKE_GT), /*
1381 		0x24180 - 0x241ff: gt
1382 		0x24200 - 0x249ff: reserved */
1383 	GEN_FW_RANGE(0x24a00, 0x251ff, FORCEWAKE_RENDER), /*
1384 		0x24a00 - 0x24a7f: render
1385 		0x24a80 - 0x251ff: reserved */
1386 	GEN_FW_RANGE(0x25200, 0x255ff, FORCEWAKE_GT), /*
1387 		0x25200 - 0x252ff: gt
1388 		0x25300 - 0x255ff: reserved */
1389 	GEN_FW_RANGE(0x25600, 0x2567f, FORCEWAKE_MEDIA_VDBOX0),
1390 	GEN_FW_RANGE(0x25680, 0x259ff, FORCEWAKE_MEDIA_VDBOX2), /*
1391 		0x25680 - 0x256ff: VD2
1392 		0x25700 - 0x259ff: reserved */
1393 	GEN_FW_RANGE(0x25a00, 0x25a7f, FORCEWAKE_MEDIA_VDBOX0),
1394 	GEN_FW_RANGE(0x25a80, 0x2ffff, FORCEWAKE_MEDIA_VDBOX2), /*
1395 		0x25a80 - 0x25aff: VD2
1396 		0x25b00 - 0x2ffff: reserved */
1397 	GEN_FW_RANGE(0x30000, 0x3ffff, FORCEWAKE_GT),
1398 	GEN_FW_RANGE(0x40000, 0x1bffff, 0),
1399 	GEN_FW_RANGE(0x1c0000, 0x1c3fff, FORCEWAKE_MEDIA_VDBOX0), /*
1400 		0x1c0000 - 0x1c2bff: VD0
1401 		0x1c2c00 - 0x1c2cff: reserved
1402 		0x1c2d00 - 0x1c2dff: VD0
1403 		0x1c2e00 - 0x1c3eff: reserved
1404 		0x1c3f00 - 0x1c3fff: VD0 */
1405 	GEN_FW_RANGE(0x1c4000, 0x1c7fff, 0),
1406 	GEN_FW_RANGE(0x1c8000, 0x1cbfff, FORCEWAKE_MEDIA_VEBOX0), /*
1407 		0x1c8000 - 0x1ca0ff: VE0
1408 		0x1ca100 - 0x1cbeff: reserved
1409 		0x1cbf00 - 0x1cbfff: VE0 */
1410 	GEN_FW_RANGE(0x1cc000, 0x1cffff, FORCEWAKE_MEDIA_VDBOX0), /*
1411 		0x1cc000 - 0x1ccfff: VD0
1412 		0x1cd000 - 0x1cffff: reserved */
1413 	GEN_FW_RANGE(0x1d0000, 0x1d3fff, FORCEWAKE_MEDIA_VDBOX2), /*
1414 		0x1d0000 - 0x1d2bff: VD2
1415 		0x1d2c00 - 0x1d2cff: reserved
1416 		0x1d2d00 - 0x1d2dff: VD2
1417 		0x1d2e00 - 0x1d3eff: reserved
1418 		0x1d3f00 - 0x1d3fff: VD2 */
1419 };
1420 
1421 /*
1422  * Graphics IP version 12.55 brings a slight change to the 0xd800 range,
1423  * switching it from the GT domain to the render domain.
1424  */
1425 #define XEHP_FWRANGES(FW_RANGE_D800)					\
1426 	GEN_FW_RANGE(0x0, 0x1fff, 0), /*					\
1427 		  0x0 -  0xaff: reserved					\
1428 		0xb00 - 0x1fff: always on */					\
1429 	GEN_FW_RANGE(0x2000, 0x26ff, FORCEWAKE_RENDER),				\
1430 	GEN_FW_RANGE(0x2700, 0x4aff, FORCEWAKE_GT),				\
1431 	GEN_FW_RANGE(0x4b00, 0x51ff, 0), /*					\
1432 		0x4b00 - 0x4fff: reserved					\
1433 		0x5000 - 0x51ff: always on */					\
1434 	GEN_FW_RANGE(0x5200, 0x7fff, FORCEWAKE_RENDER),				\
1435 	GEN_FW_RANGE(0x8000, 0x813f, FORCEWAKE_GT),				\
1436 	GEN_FW_RANGE(0x8140, 0x815f, FORCEWAKE_RENDER),				\
1437 	GEN_FW_RANGE(0x8160, 0x81ff, 0), /*					\
1438 		0x8160 - 0x817f: reserved					\
1439 		0x8180 - 0x81ff: always on */					\
1440 	GEN_FW_RANGE(0x8200, 0x82ff, FORCEWAKE_GT),				\
1441 	GEN_FW_RANGE(0x8300, 0x84ff, FORCEWAKE_RENDER),				\
1442 	GEN_FW_RANGE(0x8500, 0x8cff, FORCEWAKE_GT), /*				\
1443 		0x8500 - 0x87ff: gt						\
1444 		0x8800 - 0x8c7f: reserved					\
1445 		0x8c80 - 0x8cff: gt (DG2 only) */				\
1446 	GEN_FW_RANGE(0x8d00, 0x8fff, FORCEWAKE_RENDER), /*			\
1447 		0x8d00 - 0x8dff: render (DG2 only)				\
1448 		0x8e00 - 0x8fff: reserved */					\
1449 	GEN_FW_RANGE(0x9000, 0x94cf, FORCEWAKE_GT), /*				\
1450 		0x9000 - 0x947f: gt						\
1451 		0x9480 - 0x94cf: reserved */					\
1452 	GEN_FW_RANGE(0x94d0, 0x955f, FORCEWAKE_RENDER),				\
1453 	GEN_FW_RANGE(0x9560, 0x967f, 0), /*					\
1454 		0x9560 - 0x95ff: always on					\
1455 		0x9600 - 0x967f: reserved */					\
1456 	GEN_FW_RANGE(0x9680, 0x97ff, FORCEWAKE_RENDER), /*			\
1457 		0x9680 - 0x96ff: render (DG2 only)				\
1458 		0x9700 - 0x97ff: reserved */					\
1459 	GEN_FW_RANGE(0x9800, 0xcfff, FORCEWAKE_GT), /*				\
1460 		0x9800 - 0xb4ff: gt						\
1461 		0xb500 - 0xbfff: reserved					\
1462 		0xc000 - 0xcfff: gt */						\
1463 	GEN_FW_RANGE(0xd000, 0xd7ff, 0),					\
1464 	GEN_FW_RANGE(0xd800, 0xd87f, FW_RANGE_D800),			\
1465 	GEN_FW_RANGE(0xd880, 0xdbff, FORCEWAKE_GT),				\
1466 	GEN_FW_RANGE(0xdc00, 0xdcff, FORCEWAKE_RENDER),				\
1467 	GEN_FW_RANGE(0xdd00, 0xde7f, FORCEWAKE_GT), /*				\
1468 		0xdd00 - 0xddff: gt						\
1469 		0xde00 - 0xde7f: reserved */					\
1470 	GEN_FW_RANGE(0xde80, 0xe8ff, FORCEWAKE_RENDER), /*			\
1471 		0xde80 - 0xdfff: render						\
1472 		0xe000 - 0xe0ff: reserved					\
1473 		0xe100 - 0xe8ff: render */					\
1474 	GEN_FW_RANGE(0xe900, 0xffff, FORCEWAKE_GT), /*				\
1475 		0xe900 - 0xe9ff: gt						\
1476 		0xea00 - 0xefff: reserved					\
1477 		0xf000 - 0xffff: gt */						\
1478 	GEN_FW_RANGE(0x10000, 0x12fff, 0), /*					\
1479 		0x10000 - 0x11fff: reserved					\
1480 		0x12000 - 0x127ff: always on					\
1481 		0x12800 - 0x12fff: reserved */					\
1482 	GEN_FW_RANGE(0x13000, 0x131ff, FORCEWAKE_MEDIA_VDBOX0), /* DG2 only */	\
1483 	GEN_FW_RANGE(0x13200, 0x13fff, FORCEWAKE_MEDIA_VDBOX2), /*		\
1484 		0x13200 - 0x133ff: VD2 (DG2 only)				\
1485 		0x13400 - 0x13fff: reserved */					\
1486 	GEN_FW_RANGE(0x14000, 0x141ff, FORCEWAKE_MEDIA_VDBOX0), /* XEHPSDV only */	\
1487 	GEN_FW_RANGE(0x14200, 0x143ff, FORCEWAKE_MEDIA_VDBOX2), /* XEHPSDV only */	\
1488 	GEN_FW_RANGE(0x14400, 0x145ff, FORCEWAKE_MEDIA_VDBOX4), /* XEHPSDV only */	\
1489 	GEN_FW_RANGE(0x14600, 0x147ff, FORCEWAKE_MEDIA_VDBOX6), /* XEHPSDV only */	\
1490 	GEN_FW_RANGE(0x14800, 0x14fff, FORCEWAKE_RENDER),			\
1491 	GEN_FW_RANGE(0x15000, 0x16dff, FORCEWAKE_GT), /*			\
1492 		0x15000 - 0x15fff: gt (DG2 only)				\
1493 		0x16000 - 0x16dff: reserved */					\
1494 	GEN_FW_RANGE(0x16e00, 0x1ffff, FORCEWAKE_RENDER),			\
1495 	GEN_FW_RANGE(0x20000, 0x21fff, FORCEWAKE_MEDIA_VDBOX0), /*		\
1496 		0x20000 - 0x20fff: VD0 (XEHPSDV only)				\
1497 		0x21000 - 0x21fff: reserved */					\
1498 	GEN_FW_RANGE(0x22000, 0x23fff, FORCEWAKE_GT),				\
1499 	GEN_FW_RANGE(0x24000, 0x2417f, 0), /*					\
1500 		0x24000 - 0x2407f: always on					\
1501 		0x24080 - 0x2417f: reserved */					\
1502 	GEN_FW_RANGE(0x24180, 0x249ff, FORCEWAKE_GT), /*			\
1503 		0x24180 - 0x241ff: gt						\
1504 		0x24200 - 0x249ff: reserved */					\
1505 	GEN_FW_RANGE(0x24a00, 0x251ff, FORCEWAKE_RENDER), /*			\
1506 		0x24a00 - 0x24a7f: render					\
1507 		0x24a80 - 0x251ff: reserved */					\
1508 	GEN_FW_RANGE(0x25200, 0x25fff, FORCEWAKE_GT), /*			\
1509 		0x25200 - 0x252ff: gt						\
1510 		0x25300 - 0x25fff: reserved */					\
1511 	GEN_FW_RANGE(0x26000, 0x2ffff, FORCEWAKE_RENDER), /*			\
1512 		0x26000 - 0x27fff: render					\
1513 		0x28000 - 0x29fff: reserved					\
1514 		0x2a000 - 0x2ffff: undocumented */				\
1515 	GEN_FW_RANGE(0x30000, 0x3ffff, FORCEWAKE_GT),				\
1516 	GEN_FW_RANGE(0x40000, 0x1bffff, 0),					\
1517 	GEN_FW_RANGE(0x1c0000, 0x1c3fff, FORCEWAKE_MEDIA_VDBOX0), /*		\
1518 		0x1c0000 - 0x1c2bff: VD0					\
1519 		0x1c2c00 - 0x1c2cff: reserved					\
1520 		0x1c2d00 - 0x1c2dff: VD0					\
1521 		0x1c2e00 - 0x1c3eff: VD0 (DG2 only)				\
1522 		0x1c3f00 - 0x1c3fff: VD0 */					\
1523 	GEN_FW_RANGE(0x1c4000, 0x1c7fff, FORCEWAKE_MEDIA_VDBOX1), /*		\
1524 		0x1c4000 - 0x1c6bff: VD1					\
1525 		0x1c6c00 - 0x1c6cff: reserved					\
1526 		0x1c6d00 - 0x1c6dff: VD1					\
1527 		0x1c6e00 - 0x1c7fff: reserved */				\
1528 	GEN_FW_RANGE(0x1c8000, 0x1cbfff, FORCEWAKE_MEDIA_VEBOX0), /*		\
1529 		0x1c8000 - 0x1ca0ff: VE0					\
1530 		0x1ca100 - 0x1cbfff: reserved */				\
1531 	GEN_FW_RANGE(0x1cc000, 0x1ccfff, FORCEWAKE_MEDIA_VDBOX0),		\
1532 	GEN_FW_RANGE(0x1cd000, 0x1cdfff, FORCEWAKE_MEDIA_VDBOX2),		\
1533 	GEN_FW_RANGE(0x1ce000, 0x1cefff, FORCEWAKE_MEDIA_VDBOX4),		\
1534 	GEN_FW_RANGE(0x1cf000, 0x1cffff, FORCEWAKE_MEDIA_VDBOX6),		\
1535 	GEN_FW_RANGE(0x1d0000, 0x1d3fff, FORCEWAKE_MEDIA_VDBOX2), /*		\
1536 		0x1d0000 - 0x1d2bff: VD2					\
1537 		0x1d2c00 - 0x1d2cff: reserved					\
1538 		0x1d2d00 - 0x1d2dff: VD2					\
1539 		0x1d2e00 - 0x1d3dff: VD2 (DG2 only)				\
1540 		0x1d3e00 - 0x1d3eff: reserved					\
1541 		0x1d3f00 - 0x1d3fff: VD2 */					\
1542 	GEN_FW_RANGE(0x1d4000, 0x1d7fff, FORCEWAKE_MEDIA_VDBOX3), /*		\
1543 		0x1d4000 - 0x1d6bff: VD3					\
1544 		0x1d6c00 - 0x1d6cff: reserved					\
1545 		0x1d6d00 - 0x1d6dff: VD3					\
1546 		0x1d6e00 - 0x1d7fff: reserved */				\
1547 	GEN_FW_RANGE(0x1d8000, 0x1dffff, FORCEWAKE_MEDIA_VEBOX1), /*		\
1548 		0x1d8000 - 0x1da0ff: VE1					\
1549 		0x1da100 - 0x1dffff: reserved */				\
1550 	GEN_FW_RANGE(0x1e0000, 0x1e3fff, FORCEWAKE_MEDIA_VDBOX4), /*		\
1551 		0x1e0000 - 0x1e2bff: VD4					\
1552 		0x1e2c00 - 0x1e2cff: reserved					\
1553 		0x1e2d00 - 0x1e2dff: VD4					\
1554 		0x1e2e00 - 0x1e3eff: reserved					\
1555 		0x1e3f00 - 0x1e3fff: VD4 */					\
1556 	GEN_FW_RANGE(0x1e4000, 0x1e7fff, FORCEWAKE_MEDIA_VDBOX5), /*		\
1557 		0x1e4000 - 0x1e6bff: VD5					\
1558 		0x1e6c00 - 0x1e6cff: reserved					\
1559 		0x1e6d00 - 0x1e6dff: VD5					\
1560 		0x1e6e00 - 0x1e7fff: reserved */				\
1561 	GEN_FW_RANGE(0x1e8000, 0x1effff, FORCEWAKE_MEDIA_VEBOX2), /*		\
1562 		0x1e8000 - 0x1ea0ff: VE2					\
1563 		0x1ea100 - 0x1effff: reserved */				\
1564 	GEN_FW_RANGE(0x1f0000, 0x1f3fff, FORCEWAKE_MEDIA_VDBOX6), /*		\
1565 		0x1f0000 - 0x1f2bff: VD6					\
1566 		0x1f2c00 - 0x1f2cff: reserved					\
1567 		0x1f2d00 - 0x1f2dff: VD6					\
1568 		0x1f2e00 - 0x1f3eff: reserved					\
1569 		0x1f3f00 - 0x1f3fff: VD6 */					\
1570 	GEN_FW_RANGE(0x1f4000, 0x1f7fff, FORCEWAKE_MEDIA_VDBOX7), /*		\
1571 		0x1f4000 - 0x1f6bff: VD7					\
1572 		0x1f6c00 - 0x1f6cff: reserved					\
1573 		0x1f6d00 - 0x1f6dff: VD7					\
1574 		0x1f6e00 - 0x1f7fff: reserved */				\
1575 	GEN_FW_RANGE(0x1f8000, 0x1fa0ff, FORCEWAKE_MEDIA_VEBOX3),
1576 
1577 static const struct intel_forcewake_range __xehp_fw_ranges[] = {
1578 	XEHP_FWRANGES(FORCEWAKE_GT)
1579 };
1580 
1581 static const struct intel_forcewake_range __dg2_fw_ranges[] = {
1582 	XEHP_FWRANGES(FORCEWAKE_RENDER)
1583 };
1584 
1585 static const struct intel_forcewake_range __pvc_fw_ranges[] = {
1586 	GEN_FW_RANGE(0x0, 0xaff, 0),
1587 	GEN_FW_RANGE(0xb00, 0xbff, FORCEWAKE_GT),
1588 	GEN_FW_RANGE(0xc00, 0xfff, 0),
1589 	GEN_FW_RANGE(0x1000, 0x1fff, FORCEWAKE_GT),
1590 	GEN_FW_RANGE(0x2000, 0x26ff, FORCEWAKE_RENDER),
1591 	GEN_FW_RANGE(0x2700, 0x2fff, FORCEWAKE_GT),
1592 	GEN_FW_RANGE(0x3000, 0x3fff, FORCEWAKE_RENDER),
1593 	GEN_FW_RANGE(0x4000, 0x813f, FORCEWAKE_GT), /*
1594 		0x4000 - 0x4aff: gt
1595 		0x4b00 - 0x4fff: reserved
1596 		0x5000 - 0x51ff: gt
1597 		0x5200 - 0x52ff: reserved
1598 		0x5300 - 0x53ff: gt
1599 		0x5400 - 0x7fff: reserved
1600 		0x8000 - 0x813f: gt */
1601 	GEN_FW_RANGE(0x8140, 0x817f, FORCEWAKE_RENDER),
1602 	GEN_FW_RANGE(0x8180, 0x81ff, 0),
1603 	GEN_FW_RANGE(0x8200, 0x94cf, FORCEWAKE_GT), /*
1604 		0x8200 - 0x82ff: gt
1605 		0x8300 - 0x84ff: reserved
1606 		0x8500 - 0x887f: gt
1607 		0x8880 - 0x8a7f: reserved
1608 		0x8a80 - 0x8aff: gt
1609 		0x8b00 - 0x8fff: reserved
1610 		0x9000 - 0x947f: gt
1611 		0x9480 - 0x94cf: reserved */
1612 	GEN_FW_RANGE(0x94d0, 0x955f, FORCEWAKE_RENDER),
1613 	GEN_FW_RANGE(0x9560, 0x967f, 0), /*
1614 		0x9560 - 0x95ff: always on
1615 		0x9600 - 0x967f: reserved */
1616 	GEN_FW_RANGE(0x9680, 0x97ff, FORCEWAKE_RENDER), /*
1617 		0x9680 - 0x96ff: render
1618 		0x9700 - 0x97ff: reserved */
1619 	GEN_FW_RANGE(0x9800, 0xcfff, FORCEWAKE_GT), /*
1620 		0x9800 - 0xb4ff: gt
1621 		0xb500 - 0xbfff: reserved
1622 		0xc000 - 0xcfff: gt */
1623 	GEN_FW_RANGE(0xd000, 0xd3ff, 0),
1624 	GEN_FW_RANGE(0xd400, 0xdbff, FORCEWAKE_GT),
1625 	GEN_FW_RANGE(0xdc00, 0xdcff, FORCEWAKE_RENDER),
1626 	GEN_FW_RANGE(0xdd00, 0xde7f, FORCEWAKE_GT), /*
1627 		0xdd00 - 0xddff: gt
1628 		0xde00 - 0xde7f: reserved */
1629 	GEN_FW_RANGE(0xde80, 0xe8ff, FORCEWAKE_RENDER), /*
1630 		0xde80 - 0xdeff: render
1631 		0xdf00 - 0xe1ff: reserved
1632 		0xe200 - 0xe7ff: render
1633 		0xe800 - 0xe8ff: reserved */
1634 	GEN_FW_RANGE(0xe900, 0x11fff, FORCEWAKE_GT), /*
1635 		 0xe900 -  0xe9ff: gt
1636 		 0xea00 -  0xebff: reserved
1637 		 0xec00 -  0xffff: gt
1638 		0x10000 - 0x11fff: reserved */
1639 	GEN_FW_RANGE(0x12000, 0x12fff, 0), /*
1640 		0x12000 - 0x127ff: always on
1641 		0x12800 - 0x12fff: reserved */
1642 	GEN_FW_RANGE(0x13000, 0x23fff, FORCEWAKE_GT), /*
1643 		0x13000 - 0x135ff: gt
1644 		0x13600 - 0x147ff: reserved
1645 		0x14800 - 0x153ff: gt
1646 		0x15400 - 0x19fff: reserved
1647 		0x1a000 - 0x1ffff: gt
1648 		0x20000 - 0x21fff: reserved
1649 		0x22000 - 0x23fff: gt */
1650 	GEN_FW_RANGE(0x24000, 0x2417f, 0), /*
1651 		24000 - 0x2407f: always on
1652 		24080 - 0x2417f: reserved */
1653 	GEN_FW_RANGE(0x24180, 0x3ffff, FORCEWAKE_GT), /*
1654 		0x24180 - 0x241ff: gt
1655 		0x24200 - 0x251ff: reserved
1656 		0x25200 - 0x252ff: gt
1657 		0x25300 - 0x25fff: reserved
1658 		0x26000 - 0x27fff: gt
1659 		0x28000 - 0x2ffff: reserved
1660 		0x30000 - 0x3ffff: gt */
1661 	GEN_FW_RANGE(0x40000, 0x1bffff, 0),
1662 	GEN_FW_RANGE(0x1c0000, 0x1c3fff, FORCEWAKE_MEDIA_VDBOX0), /*
1663 		0x1c0000 - 0x1c2bff: VD0
1664 		0x1c2c00 - 0x1c2cff: reserved
1665 		0x1c2d00 - 0x1c2dff: VD0
1666 		0x1c2e00 - 0x1c3eff: reserved
1667 		0x1c3f00 - 0x1c3fff: VD0 */
1668 	GEN_FW_RANGE(0x1c4000, 0x1cffff, FORCEWAKE_MEDIA_VDBOX1), /*
1669 		0x1c4000 - 0x1c6aff: VD1
1670 		0x1c6b00 - 0x1c7eff: reserved
1671 		0x1c7f00 - 0x1c7fff: VD1
1672 		0x1c8000 - 0x1cffff: reserved */
1673 	GEN_FW_RANGE(0x1d0000, 0x23ffff, FORCEWAKE_MEDIA_VDBOX2), /*
1674 		0x1d0000 - 0x1d2aff: VD2
1675 		0x1d2b00 - 0x1d3eff: reserved
1676 		0x1d3f00 - 0x1d3fff: VD2
1677 		0x1d4000 - 0x23ffff: reserved */
1678 	GEN_FW_RANGE(0x240000, 0x3dffff, 0),
1679 	GEN_FW_RANGE(0x3e0000, 0x3effff, FORCEWAKE_GT),
1680 };
1681 
1682 static void
ilk_dummy_write(struct intel_uncore * uncore)1683 ilk_dummy_write(struct intel_uncore *uncore)
1684 {
1685 	/* WaIssueDummyWriteToWakeupFromRC6:ilk Issue a dummy write to wake up
1686 	 * the chip from rc6 before touching it for real. MI_MODE is masked,
1687 	 * hence harmless to write 0 into. */
1688 	__raw_uncore_write32(uncore, RING_MI_MODE(RENDER_RING_BASE), 0);
1689 }
1690 
1691 static void
__unclaimed_reg_debug(struct intel_uncore * uncore,const i915_reg_t reg,const bool read)1692 __unclaimed_reg_debug(struct intel_uncore *uncore,
1693 		      const i915_reg_t reg,
1694 		      const bool read)
1695 {
1696 	if (drm_WARN(&uncore->i915->drm,
1697 		     check_for_unclaimed_mmio(uncore),
1698 		     "Unclaimed %s register 0x%x\n",
1699 		     read ? "read from" : "write to",
1700 		     i915_mmio_reg_offset(reg)))
1701 		/* Only report the first N failures */
1702 		uncore->i915->params.mmio_debug--;
1703 }
1704 
1705 static void
__unclaimed_previous_reg_debug(struct intel_uncore * uncore,const i915_reg_t reg,const bool read)1706 __unclaimed_previous_reg_debug(struct intel_uncore *uncore,
1707 			       const i915_reg_t reg,
1708 			       const bool read)
1709 {
1710 	if (check_for_unclaimed_mmio(uncore))
1711 		drm_dbg(&uncore->i915->drm,
1712 			"Unclaimed access detected before %s register 0x%x\n",
1713 			read ? "read from" : "write to",
1714 			i915_mmio_reg_offset(reg));
1715 }
1716 
1717 static inline void
unclaimed_reg_debug(struct intel_uncore * uncore,const i915_reg_t reg,const bool read,const bool before)1718 unclaimed_reg_debug(struct intel_uncore *uncore,
1719 		    const i915_reg_t reg,
1720 		    const bool read,
1721 		    const bool before)
1722 {
1723 	if (likely(!uncore->i915->params.mmio_debug) || !uncore->debug)
1724 		return;
1725 
1726 	/* interrupts are disabled and re-enabled around uncore->lock usage */
1727 	lockdep_assert_held(&uncore->lock);
1728 
1729 	if (before) {
1730 		spin_lock(&uncore->debug->lock);
1731 		__unclaimed_previous_reg_debug(uncore, reg, read);
1732 	} else {
1733 		__unclaimed_reg_debug(uncore, reg, read);
1734 		spin_unlock(&uncore->debug->lock);
1735 	}
1736 }
1737 
1738 #define __vgpu_read(x) \
1739 static u##x \
1740 vgpu_read##x(struct intel_uncore *uncore, i915_reg_t reg, bool trace) { \
1741 	u##x val = __raw_uncore_read##x(uncore, reg); \
1742 	trace_i915_reg_rw(false, reg, val, sizeof(val), trace); \
1743 	return val; \
1744 }
1745 __vgpu_read(8)
1746 __vgpu_read(16)
1747 __vgpu_read(32)
1748 __vgpu_read(64)
1749 
1750 #define GEN2_READ_HEADER(x) \
1751 	u##x val = 0; \
1752 	assert_rpm_wakelock_held(uncore->rpm);
1753 
1754 #define GEN2_READ_FOOTER \
1755 	trace_i915_reg_rw(false, reg, val, sizeof(val), trace); \
1756 	return val
1757 
1758 #define __gen2_read(x) \
1759 static u##x \
1760 gen2_read##x(struct intel_uncore *uncore, i915_reg_t reg, bool trace) { \
1761 	GEN2_READ_HEADER(x); \
1762 	val = __raw_uncore_read##x(uncore, reg); \
1763 	GEN2_READ_FOOTER; \
1764 }
1765 
1766 #define __gen5_read(x) \
1767 static u##x \
1768 gen5_read##x(struct intel_uncore *uncore, i915_reg_t reg, bool trace) { \
1769 	GEN2_READ_HEADER(x); \
1770 	ilk_dummy_write(uncore); \
1771 	val = __raw_uncore_read##x(uncore, reg); \
1772 	GEN2_READ_FOOTER; \
1773 }
1774 
1775 __gen5_read(8)
1776 __gen5_read(16)
1777 __gen5_read(32)
1778 __gen5_read(64)
1779 __gen2_read(8)
1780 __gen2_read(16)
1781 __gen2_read(32)
1782 __gen2_read(64)
1783 
1784 #undef __gen5_read
1785 #undef __gen2_read
1786 
1787 #undef GEN2_READ_FOOTER
1788 #undef GEN2_READ_HEADER
1789 
1790 #define GEN6_READ_HEADER(x) \
1791 	u32 offset = i915_mmio_reg_offset(reg); \
1792 	unsigned long irqflags; \
1793 	u##x val = 0; \
1794 	assert_rpm_wakelock_held(uncore->rpm); \
1795 	spin_lock_irqsave(&uncore->lock, irqflags); \
1796 	unclaimed_reg_debug(uncore, reg, true, true)
1797 
1798 #define GEN6_READ_FOOTER \
1799 	unclaimed_reg_debug(uncore, reg, true, false); \
1800 	spin_unlock_irqrestore(&uncore->lock, irqflags); \
1801 	trace_i915_reg_rw(false, reg, val, sizeof(val), trace); \
1802 	return val
1803 
___force_wake_auto(struct intel_uncore * uncore,enum forcewake_domains fw_domains)1804 static noinline void ___force_wake_auto(struct intel_uncore *uncore,
1805 					enum forcewake_domains fw_domains)
1806 {
1807 	struct intel_uncore_forcewake_domain *domain;
1808 	unsigned int tmp;
1809 
1810 	GEM_BUG_ON(fw_domains & ~uncore->fw_domains);
1811 
1812 	for_each_fw_domain_masked(domain, fw_domains, uncore, tmp)
1813 		fw_domain_arm_timer(domain);
1814 
1815 	fw_domains_get(uncore, fw_domains);
1816 }
1817 
__force_wake_auto(struct intel_uncore * uncore,enum forcewake_domains fw_domains)1818 static inline void __force_wake_auto(struct intel_uncore *uncore,
1819 				     enum forcewake_domains fw_domains)
1820 {
1821 	GEM_BUG_ON(!fw_domains);
1822 
1823 	/* Turn on all requested but inactive supported forcewake domains. */
1824 	fw_domains &= uncore->fw_domains;
1825 	fw_domains &= ~uncore->fw_domains_active;
1826 
1827 	if (fw_domains)
1828 		___force_wake_auto(uncore, fw_domains);
1829 }
1830 
1831 #define __gen_fwtable_read(x) \
1832 static u##x \
1833 fwtable_read##x(struct intel_uncore *uncore, i915_reg_t reg, bool trace) \
1834 { \
1835 	enum forcewake_domains fw_engine; \
1836 	GEN6_READ_HEADER(x); \
1837 	fw_engine = __fwtable_reg_read_fw_domains(uncore, offset); \
1838 	if (fw_engine) \
1839 		__force_wake_auto(uncore, fw_engine); \
1840 	val = __raw_uncore_read##x(uncore, reg); \
1841 	GEN6_READ_FOOTER; \
1842 }
1843 
1844 static enum forcewake_domains
fwtable_reg_read_fw_domains(struct intel_uncore * uncore,i915_reg_t reg)1845 fwtable_reg_read_fw_domains(struct intel_uncore *uncore, i915_reg_t reg) {
1846 	return __fwtable_reg_read_fw_domains(uncore, i915_mmio_reg_offset(reg));
1847 }
1848 
1849 __gen_fwtable_read(8)
1850 __gen_fwtable_read(16)
1851 __gen_fwtable_read(32)
1852 __gen_fwtable_read(64)
1853 
1854 #undef __gen_fwtable_read
1855 #undef GEN6_READ_FOOTER
1856 #undef GEN6_READ_HEADER
1857 
1858 #define GEN2_WRITE_HEADER \
1859 	trace_i915_reg_rw(true, reg, val, sizeof(val), trace); \
1860 	assert_rpm_wakelock_held(uncore->rpm); \
1861 
1862 #define GEN2_WRITE_FOOTER
1863 
1864 #define __gen2_write(x) \
1865 static void \
1866 gen2_write##x(struct intel_uncore *uncore, i915_reg_t reg, u##x val, bool trace) { \
1867 	GEN2_WRITE_HEADER; \
1868 	__raw_uncore_write##x(uncore, reg, val); \
1869 	GEN2_WRITE_FOOTER; \
1870 }
1871 
1872 #define __gen5_write(x) \
1873 static void \
1874 gen5_write##x(struct intel_uncore *uncore, i915_reg_t reg, u##x val, bool trace) { \
1875 	GEN2_WRITE_HEADER; \
1876 	ilk_dummy_write(uncore); \
1877 	__raw_uncore_write##x(uncore, reg, val); \
1878 	GEN2_WRITE_FOOTER; \
1879 }
1880 
1881 __gen5_write(8)
1882 __gen5_write(16)
1883 __gen5_write(32)
1884 __gen2_write(8)
1885 __gen2_write(16)
1886 __gen2_write(32)
1887 
1888 #undef __gen5_write
1889 #undef __gen2_write
1890 
1891 #undef GEN2_WRITE_FOOTER
1892 #undef GEN2_WRITE_HEADER
1893 
1894 #define GEN6_WRITE_HEADER \
1895 	u32 offset = i915_mmio_reg_offset(reg); \
1896 	unsigned long irqflags; \
1897 	trace_i915_reg_rw(true, reg, val, sizeof(val), trace); \
1898 	assert_rpm_wakelock_held(uncore->rpm); \
1899 	spin_lock_irqsave(&uncore->lock, irqflags); \
1900 	unclaimed_reg_debug(uncore, reg, false, true)
1901 
1902 #define GEN6_WRITE_FOOTER \
1903 	unclaimed_reg_debug(uncore, reg, false, false); \
1904 	spin_unlock_irqrestore(&uncore->lock, irqflags)
1905 
1906 #define __gen6_write(x) \
1907 static void \
1908 gen6_write##x(struct intel_uncore *uncore, i915_reg_t reg, u##x val, bool trace) { \
1909 	GEN6_WRITE_HEADER; \
1910 	if (NEEDS_FORCE_WAKE(offset)) \
1911 		__gen6_gt_wait_for_fifo(uncore); \
1912 	__raw_uncore_write##x(uncore, reg, val); \
1913 	GEN6_WRITE_FOOTER; \
1914 }
1915 __gen6_write(8)
1916 __gen6_write(16)
1917 __gen6_write(32)
1918 
1919 #define __gen_fwtable_write(x) \
1920 static void \
1921 fwtable_write##x(struct intel_uncore *uncore, i915_reg_t reg, u##x val, bool trace) { \
1922 	enum forcewake_domains fw_engine; \
1923 	GEN6_WRITE_HEADER; \
1924 	fw_engine = __fwtable_reg_write_fw_domains(uncore, offset); \
1925 	if (fw_engine) \
1926 		__force_wake_auto(uncore, fw_engine); \
1927 	__raw_uncore_write##x(uncore, reg, val); \
1928 	GEN6_WRITE_FOOTER; \
1929 }
1930 
1931 static enum forcewake_domains
fwtable_reg_write_fw_domains(struct intel_uncore * uncore,i915_reg_t reg)1932 fwtable_reg_write_fw_domains(struct intel_uncore *uncore, i915_reg_t reg)
1933 {
1934 	return __fwtable_reg_write_fw_domains(uncore, i915_mmio_reg_offset(reg));
1935 }
1936 
1937 __gen_fwtable_write(8)
1938 __gen_fwtable_write(16)
1939 __gen_fwtable_write(32)
1940 
1941 #undef __gen_fwtable_write
1942 #undef GEN6_WRITE_FOOTER
1943 #undef GEN6_WRITE_HEADER
1944 
1945 #define __vgpu_write(x) \
1946 static void \
1947 vgpu_write##x(struct intel_uncore *uncore, i915_reg_t reg, u##x val, bool trace) { \
1948 	trace_i915_reg_rw(true, reg, val, sizeof(val), trace); \
1949 	__raw_uncore_write##x(uncore, reg, val); \
1950 }
1951 __vgpu_write(8)
1952 __vgpu_write(16)
1953 __vgpu_write(32)
1954 
1955 #define ASSIGN_RAW_WRITE_MMIO_VFUNCS(uncore, x) \
1956 do { \
1957 	(uncore)->funcs.mmio_writeb = x##_write8; \
1958 	(uncore)->funcs.mmio_writew = x##_write16; \
1959 	(uncore)->funcs.mmio_writel = x##_write32; \
1960 } while (0)
1961 
1962 #define ASSIGN_RAW_READ_MMIO_VFUNCS(uncore, x) \
1963 do { \
1964 	(uncore)->funcs.mmio_readb = x##_read8; \
1965 	(uncore)->funcs.mmio_readw = x##_read16; \
1966 	(uncore)->funcs.mmio_readl = x##_read32; \
1967 	(uncore)->funcs.mmio_readq = x##_read64; \
1968 } while (0)
1969 
1970 #define ASSIGN_WRITE_MMIO_VFUNCS(uncore, x) \
1971 do { \
1972 	ASSIGN_RAW_WRITE_MMIO_VFUNCS((uncore), x); \
1973 	(uncore)->funcs.write_fw_domains = x##_reg_write_fw_domains; \
1974 } while (0)
1975 
1976 #define ASSIGN_READ_MMIO_VFUNCS(uncore, x) \
1977 do { \
1978 	ASSIGN_RAW_READ_MMIO_VFUNCS(uncore, x); \
1979 	(uncore)->funcs.read_fw_domains = x##_reg_read_fw_domains; \
1980 } while (0)
1981 
__fw_domain_init(struct intel_uncore * uncore,enum forcewake_domain_id domain_id,i915_reg_t reg_set,i915_reg_t reg_ack)1982 static int __fw_domain_init(struct intel_uncore *uncore,
1983 			    enum forcewake_domain_id domain_id,
1984 			    i915_reg_t reg_set,
1985 			    i915_reg_t reg_ack)
1986 {
1987 	struct intel_uncore_forcewake_domain *d;
1988 
1989 	GEM_BUG_ON(domain_id >= FW_DOMAIN_ID_COUNT);
1990 	GEM_BUG_ON(uncore->fw_domain[domain_id]);
1991 
1992 	if (i915_inject_probe_failure(uncore->i915))
1993 		return -ENOMEM;
1994 
1995 	d = kzalloc(sizeof(*d), GFP_KERNEL);
1996 	if (!d)
1997 		return -ENOMEM;
1998 
1999 	drm_WARN_ON(&uncore->i915->drm, !i915_mmio_reg_valid(reg_set));
2000 	drm_WARN_ON(&uncore->i915->drm, !i915_mmio_reg_valid(reg_ack));
2001 
2002 	d->uncore = uncore;
2003 	d->wake_count = 0;
2004 	d->reg_set = uncore->regs + i915_mmio_reg_offset(reg_set) + uncore->gsi_offset;
2005 	d->reg_ack = uncore->regs + i915_mmio_reg_offset(reg_ack) + uncore->gsi_offset;
2006 
2007 	d->id = domain_id;
2008 
2009 	BUILD_BUG_ON(FORCEWAKE_RENDER != (1 << FW_DOMAIN_ID_RENDER));
2010 	BUILD_BUG_ON(FORCEWAKE_GT != (1 << FW_DOMAIN_ID_GT));
2011 	BUILD_BUG_ON(FORCEWAKE_MEDIA != (1 << FW_DOMAIN_ID_MEDIA));
2012 	BUILD_BUG_ON(FORCEWAKE_MEDIA_VDBOX0 != (1 << FW_DOMAIN_ID_MEDIA_VDBOX0));
2013 	BUILD_BUG_ON(FORCEWAKE_MEDIA_VDBOX1 != (1 << FW_DOMAIN_ID_MEDIA_VDBOX1));
2014 	BUILD_BUG_ON(FORCEWAKE_MEDIA_VDBOX2 != (1 << FW_DOMAIN_ID_MEDIA_VDBOX2));
2015 	BUILD_BUG_ON(FORCEWAKE_MEDIA_VDBOX3 != (1 << FW_DOMAIN_ID_MEDIA_VDBOX3));
2016 	BUILD_BUG_ON(FORCEWAKE_MEDIA_VDBOX4 != (1 << FW_DOMAIN_ID_MEDIA_VDBOX4));
2017 	BUILD_BUG_ON(FORCEWAKE_MEDIA_VDBOX5 != (1 << FW_DOMAIN_ID_MEDIA_VDBOX5));
2018 	BUILD_BUG_ON(FORCEWAKE_MEDIA_VDBOX6 != (1 << FW_DOMAIN_ID_MEDIA_VDBOX6));
2019 	BUILD_BUG_ON(FORCEWAKE_MEDIA_VDBOX7 != (1 << FW_DOMAIN_ID_MEDIA_VDBOX7));
2020 	BUILD_BUG_ON(FORCEWAKE_MEDIA_VEBOX0 != (1 << FW_DOMAIN_ID_MEDIA_VEBOX0));
2021 	BUILD_BUG_ON(FORCEWAKE_MEDIA_VEBOX1 != (1 << FW_DOMAIN_ID_MEDIA_VEBOX1));
2022 	BUILD_BUG_ON(FORCEWAKE_MEDIA_VEBOX2 != (1 << FW_DOMAIN_ID_MEDIA_VEBOX2));
2023 	BUILD_BUG_ON(FORCEWAKE_MEDIA_VEBOX3 != (1 << FW_DOMAIN_ID_MEDIA_VEBOX3));
2024 
2025 	d->mask = BIT(domain_id);
2026 
2027 	hrtimer_init(&d->timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
2028 	d->timer.function = intel_uncore_fw_release_timer;
2029 
2030 	uncore->fw_domains |= BIT(domain_id);
2031 
2032 	fw_domain_reset(d);
2033 
2034 	uncore->fw_domain[domain_id] = d;
2035 
2036 	return 0;
2037 }
2038 
fw_domain_fini(struct intel_uncore * uncore,enum forcewake_domain_id domain_id)2039 static void fw_domain_fini(struct intel_uncore *uncore,
2040 			   enum forcewake_domain_id domain_id)
2041 {
2042 	struct intel_uncore_forcewake_domain *d;
2043 
2044 	GEM_BUG_ON(domain_id >= FW_DOMAIN_ID_COUNT);
2045 
2046 	d = fetch_and_zero(&uncore->fw_domain[domain_id]);
2047 	if (!d)
2048 		return;
2049 
2050 	uncore->fw_domains &= ~BIT(domain_id);
2051 	drm_WARN_ON(&uncore->i915->drm, d->wake_count);
2052 	drm_WARN_ON(&uncore->i915->drm, hrtimer_cancel(&d->timer));
2053 	kfree(d);
2054 }
2055 
intel_uncore_fw_domains_fini(struct intel_uncore * uncore)2056 static void intel_uncore_fw_domains_fini(struct intel_uncore *uncore)
2057 {
2058 	struct intel_uncore_forcewake_domain *d;
2059 	int tmp;
2060 
2061 	for_each_fw_domain(d, uncore, tmp)
2062 		fw_domain_fini(uncore, d->id);
2063 }
2064 
2065 static const struct intel_uncore_fw_get uncore_get_fallback = {
2066 	.force_wake_get = fw_domains_get_with_fallback
2067 };
2068 
2069 static const struct intel_uncore_fw_get uncore_get_normal = {
2070 	.force_wake_get = fw_domains_get_normal,
2071 };
2072 
2073 static const struct intel_uncore_fw_get uncore_get_thread_status = {
2074 	.force_wake_get = fw_domains_get_with_thread_status
2075 };
2076 
intel_uncore_fw_domains_init(struct intel_uncore * uncore)2077 static int intel_uncore_fw_domains_init(struct intel_uncore *uncore)
2078 {
2079 	struct drm_i915_private *i915 = uncore->i915;
2080 	int ret = 0;
2081 
2082 	GEM_BUG_ON(!intel_uncore_has_forcewake(uncore));
2083 
2084 #define fw_domain_init(uncore__, id__, set__, ack__) \
2085 	(ret ?: (ret = __fw_domain_init((uncore__), (id__), (set__), (ack__))))
2086 
2087 	if (GRAPHICS_VER(i915) >= 11) {
2088 		/* we'll prune the domains of missing engines later */
2089 		intel_engine_mask_t emask = RUNTIME_INFO(i915)->platform_engine_mask;
2090 		int i;
2091 
2092 		uncore->fw_get_funcs = &uncore_get_fallback;
2093 		fw_domain_init(uncore, FW_DOMAIN_ID_RENDER,
2094 			       FORCEWAKE_RENDER_GEN9,
2095 			       FORCEWAKE_ACK_RENDER_GEN9);
2096 		fw_domain_init(uncore, FW_DOMAIN_ID_GT,
2097 			       FORCEWAKE_GT_GEN9,
2098 			       FORCEWAKE_ACK_GT_GEN9);
2099 
2100 		for (i = 0; i < I915_MAX_VCS; i++) {
2101 			if (!__HAS_ENGINE(emask, _VCS(i)))
2102 				continue;
2103 
2104 			fw_domain_init(uncore, FW_DOMAIN_ID_MEDIA_VDBOX0 + i,
2105 				       FORCEWAKE_MEDIA_VDBOX_GEN11(i),
2106 				       FORCEWAKE_ACK_MEDIA_VDBOX_GEN11(i));
2107 		}
2108 		for (i = 0; i < I915_MAX_VECS; i++) {
2109 			if (!__HAS_ENGINE(emask, _VECS(i)))
2110 				continue;
2111 
2112 			fw_domain_init(uncore, FW_DOMAIN_ID_MEDIA_VEBOX0 + i,
2113 				       FORCEWAKE_MEDIA_VEBOX_GEN11(i),
2114 				       FORCEWAKE_ACK_MEDIA_VEBOX_GEN11(i));
2115 		}
2116 	} else if (IS_GRAPHICS_VER(i915, 9, 10)) {
2117 		uncore->fw_get_funcs = &uncore_get_fallback;
2118 		fw_domain_init(uncore, FW_DOMAIN_ID_RENDER,
2119 			       FORCEWAKE_RENDER_GEN9,
2120 			       FORCEWAKE_ACK_RENDER_GEN9);
2121 		fw_domain_init(uncore, FW_DOMAIN_ID_GT,
2122 			       FORCEWAKE_GT_GEN9,
2123 			       FORCEWAKE_ACK_GT_GEN9);
2124 		fw_domain_init(uncore, FW_DOMAIN_ID_MEDIA,
2125 			       FORCEWAKE_MEDIA_GEN9, FORCEWAKE_ACK_MEDIA_GEN9);
2126 	} else if (IS_VALLEYVIEW(i915) || IS_CHERRYVIEW(i915)) {
2127 		uncore->fw_get_funcs = &uncore_get_normal;
2128 		fw_domain_init(uncore, FW_DOMAIN_ID_RENDER,
2129 			       FORCEWAKE_VLV, FORCEWAKE_ACK_VLV);
2130 		fw_domain_init(uncore, FW_DOMAIN_ID_MEDIA,
2131 			       FORCEWAKE_MEDIA_VLV, FORCEWAKE_ACK_MEDIA_VLV);
2132 	} else if (IS_HASWELL(i915) || IS_BROADWELL(i915)) {
2133 		uncore->fw_get_funcs = &uncore_get_thread_status;
2134 		fw_domain_init(uncore, FW_DOMAIN_ID_RENDER,
2135 			       FORCEWAKE_MT, FORCEWAKE_ACK_HSW);
2136 	} else if (IS_IVYBRIDGE(i915)) {
2137 		u32 ecobus;
2138 
2139 		/* IVB configs may use multi-threaded forcewake */
2140 
2141 		/* A small trick here - if the bios hasn't configured
2142 		 * MT forcewake, and if the device is in RC6, then
2143 		 * force_wake_mt_get will not wake the device and the
2144 		 * ECOBUS read will return zero. Which will be
2145 		 * (correctly) interpreted by the test below as MT
2146 		 * forcewake being disabled.
2147 		 */
2148 		uncore->fw_get_funcs = &uncore_get_thread_status;
2149 
2150 		/* We need to init first for ECOBUS access and then
2151 		 * determine later if we want to reinit, in case of MT access is
2152 		 * not working. In this stage we don't know which flavour this
2153 		 * ivb is, so it is better to reset also the gen6 fw registers
2154 		 * before the ecobus check.
2155 		 */
2156 
2157 		__raw_uncore_write32(uncore, FORCEWAKE, 0);
2158 		__raw_posting_read(uncore, ECOBUS);
2159 
2160 		ret = __fw_domain_init(uncore, FW_DOMAIN_ID_RENDER,
2161 				       FORCEWAKE_MT, FORCEWAKE_MT_ACK);
2162 		if (ret)
2163 			goto out;
2164 
2165 		spin_lock_irq(&uncore->lock);
2166 		fw_domains_get_with_thread_status(uncore, FORCEWAKE_RENDER);
2167 		ecobus = __raw_uncore_read32(uncore, ECOBUS);
2168 		fw_domains_put(uncore, FORCEWAKE_RENDER);
2169 		spin_unlock_irq(&uncore->lock);
2170 
2171 		if (!(ecobus & FORCEWAKE_MT_ENABLE)) {
2172 			drm_info(&i915->drm, "No MT forcewake available on Ivybridge, this can result in issues\n");
2173 			drm_info(&i915->drm, "when using vblank-synced partial screen updates.\n");
2174 			fw_domain_fini(uncore, FW_DOMAIN_ID_RENDER);
2175 			fw_domain_init(uncore, FW_DOMAIN_ID_RENDER,
2176 				       FORCEWAKE, FORCEWAKE_ACK);
2177 		}
2178 	} else if (GRAPHICS_VER(i915) == 6) {
2179 		uncore->fw_get_funcs = &uncore_get_thread_status;
2180 		fw_domain_init(uncore, FW_DOMAIN_ID_RENDER,
2181 			       FORCEWAKE, FORCEWAKE_ACK);
2182 	}
2183 
2184 #undef fw_domain_init
2185 
2186 	/* All future platforms are expected to require complex power gating */
2187 	drm_WARN_ON(&i915->drm, !ret && uncore->fw_domains == 0);
2188 
2189 out:
2190 	if (ret)
2191 		intel_uncore_fw_domains_fini(uncore);
2192 
2193 	return ret;
2194 }
2195 
2196 #define ASSIGN_FW_DOMAINS_TABLE(uncore, d) \
2197 { \
2198 	(uncore)->fw_domains_table = \
2199 			(struct intel_forcewake_range *)(d); \
2200 	(uncore)->fw_domains_table_entries = ARRAY_SIZE((d)); \
2201 }
2202 
2203 #define ASSIGN_SHADOW_TABLE(uncore, d) \
2204 { \
2205 	(uncore)->shadowed_reg_table = d; \
2206 	(uncore)->shadowed_reg_table_entries = ARRAY_SIZE((d)); \
2207 }
2208 
i915_pmic_bus_access_notifier(struct notifier_block * nb,unsigned long action,void * data)2209 static int i915_pmic_bus_access_notifier(struct notifier_block *nb,
2210 					 unsigned long action, void *data)
2211 {
2212 	struct intel_uncore *uncore = container_of(nb,
2213 			struct intel_uncore, pmic_bus_access_nb);
2214 
2215 	switch (action) {
2216 	case MBI_PMIC_BUS_ACCESS_BEGIN:
2217 		/*
2218 		 * forcewake all now to make sure that we don't need to do a
2219 		 * forcewake later which on systems where this notifier gets
2220 		 * called requires the punit to access to the shared pmic i2c
2221 		 * bus, which will be busy after this notification, leading to:
2222 		 * "render: timed out waiting for forcewake ack request."
2223 		 * errors.
2224 		 *
2225 		 * The notifier is unregistered during intel_runtime_suspend(),
2226 		 * so it's ok to access the HW here without holding a RPM
2227 		 * wake reference -> disable wakeref asserts for the time of
2228 		 * the access.
2229 		 */
2230 		disable_rpm_wakeref_asserts(uncore->rpm);
2231 		intel_uncore_forcewake_get(uncore, FORCEWAKE_ALL);
2232 		enable_rpm_wakeref_asserts(uncore->rpm);
2233 		break;
2234 	case MBI_PMIC_BUS_ACCESS_END:
2235 		intel_uncore_forcewake_put(uncore, FORCEWAKE_ALL);
2236 		break;
2237 	}
2238 
2239 	return NOTIFY_OK;
2240 }
2241 
uncore_unmap_mmio(struct drm_device * drm,void * regs)2242 static void uncore_unmap_mmio(struct drm_device *drm, void *regs)
2243 {
2244 	iounmap(regs);
2245 }
2246 
intel_uncore_setup_mmio(struct intel_uncore * uncore,phys_addr_t phys_addr)2247 int intel_uncore_setup_mmio(struct intel_uncore *uncore, phys_addr_t phys_addr)
2248 {
2249 	struct drm_i915_private *i915 = uncore->i915;
2250 	int mmio_size;
2251 
2252 	/*
2253 	 * Before gen4, the registers and the GTT are behind different BARs.
2254 	 * However, from gen4 onwards, the registers and the GTT are shared
2255 	 * in the same BAR, so we want to restrict this ioremap from
2256 	 * clobbering the GTT which we want ioremap_wc instead. Fortunately,
2257 	 * the register BAR remains the same size for all the earlier
2258 	 * generations up to Ironlake.
2259 	 * For dgfx chips register range is expanded to 4MB, and this larger
2260 	 * range is also used for integrated gpus beginning with Meteor Lake.
2261 	 */
2262 	if (IS_DGFX(i915) || GRAPHICS_VER_FULL(i915) >= IP_VER(12, 70))
2263 		mmio_size = 4 * 1024 * 1024;
2264 	else if (GRAPHICS_VER(i915) >= 5)
2265 		mmio_size = 2 * 1024 * 1024;
2266 	else
2267 		mmio_size = 512 * 1024;
2268 
2269 	uncore->regs = ioremap(phys_addr, mmio_size);
2270 	if (uncore->regs == NULL) {
2271 		drm_err(&i915->drm, "failed to map registers\n");
2272 		return -EIO;
2273 	}
2274 
2275 	return drmm_add_action_or_reset(&i915->drm, uncore_unmap_mmio, uncore->regs);
2276 }
2277 
intel_uncore_init_early(struct intel_uncore * uncore,struct intel_gt * gt)2278 void intel_uncore_init_early(struct intel_uncore *uncore,
2279 			     struct intel_gt *gt)
2280 {
2281 	spin_lock_init(&uncore->lock);
2282 	uncore->i915 = gt->i915;
2283 	uncore->gt = gt;
2284 	uncore->rpm = &gt->i915->runtime_pm;
2285 }
2286 
uncore_raw_init(struct intel_uncore * uncore)2287 static void uncore_raw_init(struct intel_uncore *uncore)
2288 {
2289 	GEM_BUG_ON(intel_uncore_has_forcewake(uncore));
2290 
2291 	if (intel_vgpu_active(uncore->i915)) {
2292 		ASSIGN_RAW_WRITE_MMIO_VFUNCS(uncore, vgpu);
2293 		ASSIGN_RAW_READ_MMIO_VFUNCS(uncore, vgpu);
2294 	} else if (GRAPHICS_VER(uncore->i915) == 5) {
2295 		ASSIGN_RAW_WRITE_MMIO_VFUNCS(uncore, gen5);
2296 		ASSIGN_RAW_READ_MMIO_VFUNCS(uncore, gen5);
2297 	} else {
2298 		ASSIGN_RAW_WRITE_MMIO_VFUNCS(uncore, gen2);
2299 		ASSIGN_RAW_READ_MMIO_VFUNCS(uncore, gen2);
2300 	}
2301 }
2302 
uncore_forcewake_init(struct intel_uncore * uncore)2303 static int uncore_forcewake_init(struct intel_uncore *uncore)
2304 {
2305 	struct drm_i915_private *i915 = uncore->i915;
2306 	int ret;
2307 
2308 	GEM_BUG_ON(!intel_uncore_has_forcewake(uncore));
2309 
2310 	ret = intel_uncore_fw_domains_init(uncore);
2311 	if (ret)
2312 		return ret;
2313 	forcewake_early_sanitize(uncore, 0);
2314 
2315 	ASSIGN_READ_MMIO_VFUNCS(uncore, fwtable);
2316 
2317 	if (GRAPHICS_VER_FULL(i915) >= IP_VER(12, 60)) {
2318 		ASSIGN_FW_DOMAINS_TABLE(uncore, __pvc_fw_ranges);
2319 		ASSIGN_SHADOW_TABLE(uncore, pvc_shadowed_regs);
2320 		ASSIGN_WRITE_MMIO_VFUNCS(uncore, fwtable);
2321 	} else if (GRAPHICS_VER_FULL(i915) >= IP_VER(12, 55)) {
2322 		ASSIGN_FW_DOMAINS_TABLE(uncore, __dg2_fw_ranges);
2323 		ASSIGN_SHADOW_TABLE(uncore, dg2_shadowed_regs);
2324 		ASSIGN_WRITE_MMIO_VFUNCS(uncore, fwtable);
2325 	} else if (GRAPHICS_VER_FULL(i915) >= IP_VER(12, 50)) {
2326 		ASSIGN_FW_DOMAINS_TABLE(uncore, __xehp_fw_ranges);
2327 		ASSIGN_SHADOW_TABLE(uncore, gen12_shadowed_regs);
2328 		ASSIGN_WRITE_MMIO_VFUNCS(uncore, fwtable);
2329 	} else if (GRAPHICS_VER(i915) >= 12) {
2330 		ASSIGN_FW_DOMAINS_TABLE(uncore, __gen12_fw_ranges);
2331 		ASSIGN_SHADOW_TABLE(uncore, gen12_shadowed_regs);
2332 		ASSIGN_WRITE_MMIO_VFUNCS(uncore, fwtable);
2333 	} else if (GRAPHICS_VER(i915) == 11) {
2334 		ASSIGN_FW_DOMAINS_TABLE(uncore, __gen11_fw_ranges);
2335 		ASSIGN_SHADOW_TABLE(uncore, gen11_shadowed_regs);
2336 		ASSIGN_WRITE_MMIO_VFUNCS(uncore, fwtable);
2337 	} else if (IS_GRAPHICS_VER(i915, 9, 10)) {
2338 		ASSIGN_FW_DOMAINS_TABLE(uncore, __gen9_fw_ranges);
2339 		ASSIGN_SHADOW_TABLE(uncore, gen8_shadowed_regs);
2340 		ASSIGN_WRITE_MMIO_VFUNCS(uncore, fwtable);
2341 	} else if (IS_CHERRYVIEW(i915)) {
2342 		ASSIGN_FW_DOMAINS_TABLE(uncore, __chv_fw_ranges);
2343 		ASSIGN_SHADOW_TABLE(uncore, gen8_shadowed_regs);
2344 		ASSIGN_WRITE_MMIO_VFUNCS(uncore, fwtable);
2345 	} else if (GRAPHICS_VER(i915) == 8) {
2346 		ASSIGN_FW_DOMAINS_TABLE(uncore, __gen6_fw_ranges);
2347 		ASSIGN_SHADOW_TABLE(uncore, gen8_shadowed_regs);
2348 		ASSIGN_WRITE_MMIO_VFUNCS(uncore, fwtable);
2349 	} else if (IS_VALLEYVIEW(i915)) {
2350 		ASSIGN_FW_DOMAINS_TABLE(uncore, __vlv_fw_ranges);
2351 		ASSIGN_WRITE_MMIO_VFUNCS(uncore, gen6);
2352 	} else if (IS_GRAPHICS_VER(i915, 6, 7)) {
2353 		ASSIGN_FW_DOMAINS_TABLE(uncore, __gen6_fw_ranges);
2354 		ASSIGN_WRITE_MMIO_VFUNCS(uncore, gen6);
2355 	}
2356 
2357 	uncore->pmic_bus_access_nb.notifier_call = i915_pmic_bus_access_notifier;
2358 	iosf_mbi_register_pmic_bus_access_notifier(&uncore->pmic_bus_access_nb);
2359 
2360 	return 0;
2361 }
2362 
intel_uncore_init_mmio(struct intel_uncore * uncore)2363 int intel_uncore_init_mmio(struct intel_uncore *uncore)
2364 {
2365 	struct drm_i915_private *i915 = uncore->i915;
2366 	int ret;
2367 
2368 	/*
2369 	 * The boot firmware initializes local memory and assesses its health.
2370 	 * If memory training fails, the punit will have been instructed to
2371 	 * keep the GT powered down; we won't be able to communicate with it
2372 	 * and we should not continue with driver initialization.
2373 	 */
2374 	if (IS_DGFX(i915) &&
2375 	    !(__raw_uncore_read32(uncore, GU_CNTL) & LMEM_INIT)) {
2376 		drm_err(&i915->drm, "LMEM not initialized by firmware\n");
2377 		return -ENODEV;
2378 	}
2379 
2380 	if (GRAPHICS_VER(i915) > 5 && !intel_vgpu_active(i915))
2381 		uncore->flags |= UNCORE_HAS_FORCEWAKE;
2382 
2383 	if (!intel_uncore_has_forcewake(uncore)) {
2384 		uncore_raw_init(uncore);
2385 	} else {
2386 		ret = uncore_forcewake_init(uncore);
2387 		if (ret)
2388 			return ret;
2389 	}
2390 
2391 	/* make sure fw funcs are set if and only if we have fw*/
2392 	GEM_BUG_ON(intel_uncore_has_forcewake(uncore) != !!uncore->fw_get_funcs);
2393 	GEM_BUG_ON(intel_uncore_has_forcewake(uncore) != !!uncore->funcs.read_fw_domains);
2394 	GEM_BUG_ON(intel_uncore_has_forcewake(uncore) != !!uncore->funcs.write_fw_domains);
2395 
2396 	if (HAS_FPGA_DBG_UNCLAIMED(i915))
2397 		uncore->flags |= UNCORE_HAS_FPGA_DBG_UNCLAIMED;
2398 
2399 	if (IS_VALLEYVIEW(i915) || IS_CHERRYVIEW(i915))
2400 		uncore->flags |= UNCORE_HAS_DBG_UNCLAIMED;
2401 
2402 	if (IS_GRAPHICS_VER(i915, 6, 7))
2403 		uncore->flags |= UNCORE_HAS_FIFO;
2404 
2405 	/* clear out unclaimed reg detection bit */
2406 	if (intel_uncore_unclaimed_mmio(uncore))
2407 		drm_dbg(&i915->drm, "unclaimed mmio detected on uncore init, clearing\n");
2408 
2409 	return 0;
2410 }
2411 
2412 /*
2413  * We might have detected that some engines are fused off after we initialized
2414  * the forcewake domains. Prune them, to make sure they only reference existing
2415  * engines.
2416  */
intel_uncore_prune_engine_fw_domains(struct intel_uncore * uncore,struct intel_gt * gt)2417 void intel_uncore_prune_engine_fw_domains(struct intel_uncore *uncore,
2418 					  struct intel_gt *gt)
2419 {
2420 	enum forcewake_domains fw_domains = uncore->fw_domains;
2421 	enum forcewake_domain_id domain_id;
2422 	int i;
2423 
2424 	if (!intel_uncore_has_forcewake(uncore) || GRAPHICS_VER(uncore->i915) < 11)
2425 		return;
2426 
2427 	for (i = 0; i < I915_MAX_VCS; i++) {
2428 		domain_id = FW_DOMAIN_ID_MEDIA_VDBOX0 + i;
2429 
2430 		if (HAS_ENGINE(gt, _VCS(i)))
2431 			continue;
2432 
2433 		/*
2434 		 * Starting with XeHP, the power well for an even-numbered
2435 		 * VDBOX is also used for shared units within the
2436 		 * media slice such as SFC.  So even if the engine
2437 		 * itself is fused off, we still need to initialize
2438 		 * the forcewake domain if any of the other engines
2439 		 * in the same media slice are present.
2440 		 */
2441 		if (GRAPHICS_VER_FULL(uncore->i915) >= IP_VER(12, 50) && i % 2 == 0) {
2442 			if ((i + 1 < I915_MAX_VCS) && HAS_ENGINE(gt, _VCS(i + 1)))
2443 				continue;
2444 
2445 			if (HAS_ENGINE(gt, _VECS(i / 2)))
2446 				continue;
2447 		}
2448 
2449 		if (fw_domains & BIT(domain_id))
2450 			fw_domain_fini(uncore, domain_id);
2451 	}
2452 
2453 	for (i = 0; i < I915_MAX_VECS; i++) {
2454 		domain_id = FW_DOMAIN_ID_MEDIA_VEBOX0 + i;
2455 
2456 		if (HAS_ENGINE(gt, _VECS(i)))
2457 			continue;
2458 
2459 		if (fw_domains & BIT(domain_id))
2460 			fw_domain_fini(uncore, domain_id);
2461 	}
2462 }
2463 
2464 /* Called via drm-managed action */
intel_uncore_fini_mmio(struct drm_device * dev,void * data)2465 void intel_uncore_fini_mmio(struct drm_device *dev, void *data)
2466 {
2467 	struct intel_uncore *uncore = data;
2468 
2469 	if (intel_uncore_has_forcewake(uncore)) {
2470 		iosf_mbi_punit_acquire();
2471 		iosf_mbi_unregister_pmic_bus_access_notifier_unlocked(
2472 			&uncore->pmic_bus_access_nb);
2473 		intel_uncore_forcewake_reset(uncore);
2474 		intel_uncore_fw_domains_fini(uncore);
2475 		iosf_mbi_punit_release();
2476 	}
2477 }
2478 
2479 /**
2480  * __intel_wait_for_register_fw - wait until register matches expected state
2481  * @uncore: the struct intel_uncore
2482  * @reg: the register to read
2483  * @mask: mask to apply to register value
2484  * @value: expected value
2485  * @fast_timeout_us: fast timeout in microsecond for atomic/tight wait
2486  * @slow_timeout_ms: slow timeout in millisecond
2487  * @out_value: optional placeholder to hold registry value
2488  *
2489  * This routine waits until the target register @reg contains the expected
2490  * @value after applying the @mask, i.e. it waits until ::
2491  *
2492  *     (intel_uncore_read_fw(uncore, reg) & mask) == value
2493  *
2494  * Otherwise, the wait will timeout after @slow_timeout_ms milliseconds.
2495  * For atomic context @slow_timeout_ms must be zero and @fast_timeout_us
2496  * must be not larger than 20,0000 microseconds.
2497  *
2498  * Note that this routine assumes the caller holds forcewake asserted, it is
2499  * not suitable for very long waits. See intel_wait_for_register() if you
2500  * wish to wait without holding forcewake for the duration (i.e. you expect
2501  * the wait to be slow).
2502  *
2503  * Return: 0 if the register matches the desired condition, or -ETIMEDOUT.
2504  */
__intel_wait_for_register_fw(struct intel_uncore * uncore,i915_reg_t reg,u32 mask,u32 value,unsigned int fast_timeout_us,unsigned int slow_timeout_ms,u32 * out_value)2505 int __intel_wait_for_register_fw(struct intel_uncore *uncore,
2506 				 i915_reg_t reg,
2507 				 u32 mask,
2508 				 u32 value,
2509 				 unsigned int fast_timeout_us,
2510 				 unsigned int slow_timeout_ms,
2511 				 u32 *out_value)
2512 {
2513 	u32 reg_value = 0;
2514 #define done (((reg_value = intel_uncore_read_fw(uncore, reg)) & mask) == value)
2515 	int ret;
2516 
2517 	/* Catch any overuse of this function */
2518 	might_sleep_if(slow_timeout_ms);
2519 	GEM_BUG_ON(fast_timeout_us > 20000);
2520 	GEM_BUG_ON(!fast_timeout_us && !slow_timeout_ms);
2521 
2522 	ret = -ETIMEDOUT;
2523 	if (fast_timeout_us && fast_timeout_us <= 20000)
2524 		ret = _wait_for_atomic(done, fast_timeout_us, 0);
2525 	if (ret && slow_timeout_ms)
2526 		ret = wait_for(done, slow_timeout_ms);
2527 
2528 	if (out_value)
2529 		*out_value = reg_value;
2530 
2531 	return ret;
2532 #undef done
2533 }
2534 
2535 /**
2536  * __intel_wait_for_register - wait until register matches expected state
2537  * @uncore: the struct intel_uncore
2538  * @reg: the register to read
2539  * @mask: mask to apply to register value
2540  * @value: expected value
2541  * @fast_timeout_us: fast timeout in microsecond for atomic/tight wait
2542  * @slow_timeout_ms: slow timeout in millisecond
2543  * @out_value: optional placeholder to hold registry value
2544  *
2545  * This routine waits until the target register @reg contains the expected
2546  * @value after applying the @mask, i.e. it waits until ::
2547  *
2548  *     (intel_uncore_read(uncore, reg) & mask) == value
2549  *
2550  * Otherwise, the wait will timeout after @timeout_ms milliseconds.
2551  *
2552  * Return: 0 if the register matches the desired condition, or -ETIMEDOUT.
2553  */
__intel_wait_for_register(struct intel_uncore * uncore,i915_reg_t reg,u32 mask,u32 value,unsigned int fast_timeout_us,unsigned int slow_timeout_ms,u32 * out_value)2554 int __intel_wait_for_register(struct intel_uncore *uncore,
2555 			      i915_reg_t reg,
2556 			      u32 mask,
2557 			      u32 value,
2558 			      unsigned int fast_timeout_us,
2559 			      unsigned int slow_timeout_ms,
2560 			      u32 *out_value)
2561 {
2562 	unsigned fw =
2563 		intel_uncore_forcewake_for_reg(uncore, reg, FW_REG_READ);
2564 	u32 reg_value;
2565 	int ret;
2566 
2567 	might_sleep_if(slow_timeout_ms);
2568 
2569 	spin_lock_irq(&uncore->lock);
2570 	intel_uncore_forcewake_get__locked(uncore, fw);
2571 
2572 	ret = __intel_wait_for_register_fw(uncore,
2573 					   reg, mask, value,
2574 					   fast_timeout_us, 0, &reg_value);
2575 
2576 	intel_uncore_forcewake_put__locked(uncore, fw);
2577 	spin_unlock_irq(&uncore->lock);
2578 
2579 	if (ret && slow_timeout_ms)
2580 		ret = __wait_for(reg_value = intel_uncore_read_notrace(uncore,
2581 								       reg),
2582 				 (reg_value & mask) == value,
2583 				 slow_timeout_ms * 1000, 10, 1000);
2584 
2585 	/* just trace the final value */
2586 	trace_i915_reg_rw(false, reg, reg_value, sizeof(reg_value), true);
2587 
2588 	if (out_value)
2589 		*out_value = reg_value;
2590 
2591 	return ret;
2592 }
2593 
intel_uncore_unclaimed_mmio(struct intel_uncore * uncore)2594 bool intel_uncore_unclaimed_mmio(struct intel_uncore *uncore)
2595 {
2596 	bool ret;
2597 
2598 	if (!uncore->debug)
2599 		return false;
2600 
2601 	spin_lock_irq(&uncore->debug->lock);
2602 	ret = check_for_unclaimed_mmio(uncore);
2603 	spin_unlock_irq(&uncore->debug->lock);
2604 
2605 	return ret;
2606 }
2607 
2608 bool
intel_uncore_arm_unclaimed_mmio_detection(struct intel_uncore * uncore)2609 intel_uncore_arm_unclaimed_mmio_detection(struct intel_uncore *uncore)
2610 {
2611 	bool ret = false;
2612 
2613 	if (drm_WARN_ON(&uncore->i915->drm, !uncore->debug))
2614 		return false;
2615 
2616 	spin_lock_irq(&uncore->debug->lock);
2617 
2618 	if (unlikely(uncore->debug->unclaimed_mmio_check <= 0))
2619 		goto out;
2620 
2621 	if (unlikely(check_for_unclaimed_mmio(uncore))) {
2622 		if (!uncore->i915->params.mmio_debug) {
2623 			drm_dbg(&uncore->i915->drm,
2624 				"Unclaimed register detected, "
2625 				"enabling oneshot unclaimed register reporting. "
2626 				"Please use i915.mmio_debug=N for more information.\n");
2627 			uncore->i915->params.mmio_debug++;
2628 		}
2629 		uncore->debug->unclaimed_mmio_check--;
2630 		ret = true;
2631 	}
2632 
2633 out:
2634 	spin_unlock_irq(&uncore->debug->lock);
2635 
2636 	return ret;
2637 }
2638 
2639 /**
2640  * intel_uncore_forcewake_for_reg - which forcewake domains are needed to access
2641  * 				    a register
2642  * @uncore: pointer to struct intel_uncore
2643  * @reg: register in question
2644  * @op: operation bitmask of FW_REG_READ and/or FW_REG_WRITE
2645  *
2646  * Returns a set of forcewake domains required to be taken with for example
2647  * intel_uncore_forcewake_get for the specified register to be accessible in the
2648  * specified mode (read, write or read/write) with raw mmio accessors.
2649  *
2650  * NOTE: On Gen6 and Gen7 write forcewake domain (FORCEWAKE_RENDER) requires the
2651  * callers to do FIFO management on their own or risk losing writes.
2652  */
2653 enum forcewake_domains
intel_uncore_forcewake_for_reg(struct intel_uncore * uncore,i915_reg_t reg,unsigned int op)2654 intel_uncore_forcewake_for_reg(struct intel_uncore *uncore,
2655 			       i915_reg_t reg, unsigned int op)
2656 {
2657 	enum forcewake_domains fw_domains = 0;
2658 
2659 	drm_WARN_ON(&uncore->i915->drm, !op);
2660 
2661 	if (!intel_uncore_has_forcewake(uncore))
2662 		return 0;
2663 
2664 	if (op & FW_REG_READ)
2665 		fw_domains = uncore->funcs.read_fw_domains(uncore, reg);
2666 
2667 	if (op & FW_REG_WRITE)
2668 		fw_domains |= uncore->funcs.write_fw_domains(uncore, reg);
2669 
2670 	drm_WARN_ON(&uncore->i915->drm, fw_domains & ~uncore->fw_domains);
2671 
2672 	return fw_domains;
2673 }
2674 
2675 #if IS_ENABLED(CONFIG_DRM_I915_SELFTEST)
2676 #include "selftests/mock_uncore.c"
2677 #include "selftests/intel_uncore.c"
2678 #endif
2679