2 * Copyright © 2013 Intel Corporation
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
25 #include "intel_drv.h"
26 #include "i915_vgpu.h"
28 #include <asm/iosf_mbi.h>
29 #include <linux/pm_runtime.h>
31 #define FORCEWAKE_ACK_TIMEOUT_MS 50
33 #define __raw_posting_read(dev_priv__, reg__) (void)__raw_i915_read32((dev_priv__), (reg__))
35 static const char * const forcewake_domain_names
[] = {
42 intel_uncore_forcewake_domain_to_str(const enum forcewake_domain_id id
)
44 BUILD_BUG_ON(ARRAY_SIZE(forcewake_domain_names
) != FW_DOMAIN_ID_COUNT
);
46 if (id
>= 0 && id
< FW_DOMAIN_ID_COUNT
)
47 return forcewake_domain_names
[id
];
55 fw_domain_reset(const struct intel_uncore_forcewake_domain
*d
)
57 WARN_ON(!i915_mmio_reg_valid(d
->reg_set
));
58 __raw_i915_write32(d
->i915
, d
->reg_set
, d
->val_reset
);
62 fw_domain_arm_timer(struct intel_uncore_forcewake_domain
*d
)
65 hrtimer_start_range_ns(&d
->timer
,
72 fw_domain_wait_ack_clear(const struct intel_uncore_forcewake_domain
*d
)
74 if (wait_for_atomic((__raw_i915_read32(d
->i915
, d
->reg_ack
) &
75 FORCEWAKE_KERNEL
) == 0,
76 FORCEWAKE_ACK_TIMEOUT_MS
))
77 DRM_ERROR("%s: timed out waiting for forcewake ack to clear.\n",
78 intel_uncore_forcewake_domain_to_str(d
->id
));
82 fw_domain_get(const struct intel_uncore_forcewake_domain
*d
)
84 __raw_i915_write32(d
->i915
, d
->reg_set
, d
->val_set
);
88 fw_domain_wait_ack(const struct intel_uncore_forcewake_domain
*d
)
90 if (wait_for_atomic((__raw_i915_read32(d
->i915
, d
->reg_ack
) &
92 FORCEWAKE_ACK_TIMEOUT_MS
))
93 DRM_ERROR("%s: timed out waiting for forcewake ack request.\n",
94 intel_uncore_forcewake_domain_to_str(d
->id
));
98 fw_domain_put(const struct intel_uncore_forcewake_domain
*d
)
100 __raw_i915_write32(d
->i915
, d
->reg_set
, d
->val_clear
);
104 fw_domain_posting_read(const struct intel_uncore_forcewake_domain
*d
)
106 /* something from same cacheline, but not from the set register */
107 if (i915_mmio_reg_valid(d
->reg_post
))
108 __raw_posting_read(d
->i915
, d
->reg_post
);
112 fw_domains_get(struct drm_i915_private
*dev_priv
, enum forcewake_domains fw_domains
)
114 struct intel_uncore_forcewake_domain
*d
;
116 for_each_fw_domain_masked(d
, fw_domains
, dev_priv
) {
117 fw_domain_wait_ack_clear(d
);
121 for_each_fw_domain_masked(d
, fw_domains
, dev_priv
)
122 fw_domain_wait_ack(d
);
124 dev_priv
->uncore
.fw_domains_active
|= fw_domains
;
128 fw_domains_put(struct drm_i915_private
*dev_priv
, enum forcewake_domains fw_domains
)
130 struct intel_uncore_forcewake_domain
*d
;
132 for_each_fw_domain_masked(d
, fw_domains
, dev_priv
) {
134 fw_domain_posting_read(d
);
137 dev_priv
->uncore
.fw_domains_active
&= ~fw_domains
;
141 vgpu_fw_domains_nop(struct drm_i915_private
*dev_priv
,
142 enum forcewake_domains fw_domains
)
144 /* Guest driver doesn't need to takes care forcewake. */
148 fw_domains_posting_read(struct drm_i915_private
*dev_priv
)
150 struct intel_uncore_forcewake_domain
*d
;
152 /* No need to do for all, just do for first found */
153 for_each_fw_domain(d
, dev_priv
) {
154 fw_domain_posting_read(d
);
160 fw_domains_reset(struct drm_i915_private
*dev_priv
, enum forcewake_domains fw_domains
)
162 struct intel_uncore_forcewake_domain
*d
;
164 if (dev_priv
->uncore
.fw_domains
== 0)
167 for_each_fw_domain_masked(d
, fw_domains
, dev_priv
)
170 fw_domains_posting_read(dev_priv
);
173 static void __gen6_gt_wait_for_thread_c0(struct drm_i915_private
*dev_priv
)
175 /* w/a for a sporadic read returning 0 by waiting for the GT
178 if (wait_for_atomic_us((__raw_i915_read32(dev_priv
, GEN6_GT_THREAD_STATUS_REG
) &
179 GEN6_GT_THREAD_STATUS_CORE_MASK
) == 0, 500))
180 DRM_ERROR("GT thread status wait timed out\n");
183 static void fw_domains_get_with_thread_status(struct drm_i915_private
*dev_priv
,
184 enum forcewake_domains fw_domains
)
186 fw_domains_get(dev_priv
, fw_domains
);
188 /* WaRsForcewakeWaitTC0:snb,ivb,hsw,bdw,vlv */
189 __gen6_gt_wait_for_thread_c0(dev_priv
);
192 static void gen6_gt_check_fifodbg(struct drm_i915_private
*dev_priv
)
196 gtfifodbg
= __raw_i915_read32(dev_priv
, GTFIFODBG
);
197 if (WARN(gtfifodbg
, "GT wake FIFO error 0x%x\n", gtfifodbg
))
198 __raw_i915_write32(dev_priv
, GTFIFODBG
, gtfifodbg
);
201 static void fw_domains_put_with_fifo(struct drm_i915_private
*dev_priv
,
202 enum forcewake_domains fw_domains
)
204 fw_domains_put(dev_priv
, fw_domains
);
205 gen6_gt_check_fifodbg(dev_priv
);
208 static inline u32
fifo_free_entries(struct drm_i915_private
*dev_priv
)
210 u32 count
= __raw_i915_read32(dev_priv
, GTFIFOCTL
);
212 return count
& GT_FIFO_FREE_ENTRIES_MASK
;
215 static int __gen6_gt_wait_for_fifo(struct drm_i915_private
*dev_priv
)
219 /* On VLV, FIFO will be shared by both SW and HW.
220 * So, we need to read the FREE_ENTRIES everytime */
221 if (IS_VALLEYVIEW(dev_priv
))
222 dev_priv
->uncore
.fifo_count
= fifo_free_entries(dev_priv
);
224 if (dev_priv
->uncore
.fifo_count
< GT_FIFO_NUM_RESERVED_ENTRIES
) {
226 u32 fifo
= fifo_free_entries(dev_priv
);
228 while (fifo
<= GT_FIFO_NUM_RESERVED_ENTRIES
&& loop
--) {
230 fifo
= fifo_free_entries(dev_priv
);
232 if (WARN_ON(loop
< 0 && fifo
<= GT_FIFO_NUM_RESERVED_ENTRIES
))
234 dev_priv
->uncore
.fifo_count
= fifo
;
236 dev_priv
->uncore
.fifo_count
--;
241 static enum hrtimer_restart
242 intel_uncore_fw_release_timer(struct hrtimer
*timer
)
244 struct intel_uncore_forcewake_domain
*domain
=
245 container_of(timer
, struct intel_uncore_forcewake_domain
, timer
);
246 struct drm_i915_private
*dev_priv
= domain
->i915
;
247 unsigned long irqflags
;
249 assert_rpm_device_not_suspended(dev_priv
);
251 spin_lock_irqsave(&dev_priv
->uncore
.lock
, irqflags
);
252 if (WARN_ON(domain
->wake_count
== 0))
253 domain
->wake_count
++;
255 if (--domain
->wake_count
== 0)
256 dev_priv
->uncore
.funcs
.force_wake_put(dev_priv
, domain
->mask
);
258 spin_unlock_irqrestore(&dev_priv
->uncore
.lock
, irqflags
);
260 return HRTIMER_NORESTART
;
263 static void intel_uncore_forcewake_reset(struct drm_i915_private
*dev_priv
,
266 unsigned long irqflags
;
267 struct intel_uncore_forcewake_domain
*domain
;
268 int retry_count
= 100;
269 enum forcewake_domains fw
, active_domains
;
271 /* Hold uncore.lock across reset to prevent any register access
272 * with forcewake not set correctly. Wait until all pending
273 * timers are run before holding.
278 for_each_fw_domain(domain
, dev_priv
) {
279 if (hrtimer_cancel(&domain
->timer
) == 0)
282 intel_uncore_fw_release_timer(&domain
->timer
);
285 spin_lock_irqsave(&dev_priv
->uncore
.lock
, irqflags
);
287 for_each_fw_domain(domain
, dev_priv
) {
288 if (hrtimer_active(&domain
->timer
))
289 active_domains
|= domain
->mask
;
292 if (active_domains
== 0)
295 if (--retry_count
== 0) {
296 DRM_ERROR("Timed out waiting for forcewake timers to finish\n");
300 spin_unlock_irqrestore(&dev_priv
->uncore
.lock
, irqflags
);
304 WARN_ON(active_domains
);
306 fw
= dev_priv
->uncore
.fw_domains_active
;
308 dev_priv
->uncore
.funcs
.force_wake_put(dev_priv
, fw
);
310 fw_domains_reset(dev_priv
, FORCEWAKE_ALL
);
312 if (restore
) { /* If reset with a user forcewake, try to restore */
314 dev_priv
->uncore
.funcs
.force_wake_get(dev_priv
, fw
);
316 if (IS_GEN6(dev_priv
) || IS_GEN7(dev_priv
))
317 dev_priv
->uncore
.fifo_count
=
318 fifo_free_entries(dev_priv
);
322 assert_forcewakes_inactive(dev_priv
);
324 spin_unlock_irqrestore(&dev_priv
->uncore
.lock
, irqflags
);
327 static u64
gen9_edram_size(struct drm_i915_private
*dev_priv
)
329 const unsigned int ways
[8] = { 4, 8, 12, 16, 16, 16, 16, 16 };
330 const unsigned int sets
[4] = { 1, 1, 2, 2 };
331 const u32 cap
= dev_priv
->edram_cap
;
333 return EDRAM_NUM_BANKS(cap
) *
334 ways
[EDRAM_WAYS_IDX(cap
)] *
335 sets
[EDRAM_SETS_IDX(cap
)] *
339 u64
intel_uncore_edram_size(struct drm_i915_private
*dev_priv
)
341 if (!HAS_EDRAM(dev_priv
))
344 /* The needed capability bits for size calculation
345 * are not there with pre gen9 so return 128MB always.
347 if (INTEL_GEN(dev_priv
) < 9)
348 return 128 * 1024 * 1024;
350 return gen9_edram_size(dev_priv
);
353 static void intel_uncore_edram_detect(struct drm_i915_private
*dev_priv
)
355 if (IS_HASWELL(dev_priv
) ||
356 IS_BROADWELL(dev_priv
) ||
357 INTEL_GEN(dev_priv
) >= 9) {
358 dev_priv
->edram_cap
= __raw_i915_read32(dev_priv
,
361 /* NB: We can't write IDICR yet because we do not have gt funcs
364 dev_priv
->edram_cap
= 0;
367 if (HAS_EDRAM(dev_priv
))
368 DRM_INFO("Found %lluMB of eDRAM\n",
369 intel_uncore_edram_size(dev_priv
) / (1024 * 1024));
373 fpga_check_for_unclaimed_mmio(struct drm_i915_private
*dev_priv
)
377 dbg
= __raw_i915_read32(dev_priv
, FPGA_DBG
);
378 if (likely(!(dbg
& FPGA_DBG_RM_NOCLAIM
)))
381 __raw_i915_write32(dev_priv
, FPGA_DBG
, FPGA_DBG_RM_NOCLAIM
);
387 vlv_check_for_unclaimed_mmio(struct drm_i915_private
*dev_priv
)
391 cer
= __raw_i915_read32(dev_priv
, CLAIM_ER
);
392 if (likely(!(cer
& (CLAIM_ER_OVERFLOW
| CLAIM_ER_CTR_MASK
))))
395 __raw_i915_write32(dev_priv
, CLAIM_ER
, CLAIM_ER_CLR
);
401 check_for_unclaimed_mmio(struct drm_i915_private
*dev_priv
)
403 if (HAS_FPGA_DBG_UNCLAIMED(dev_priv
))
404 return fpga_check_for_unclaimed_mmio(dev_priv
);
406 if (IS_VALLEYVIEW(dev_priv
) || IS_CHERRYVIEW(dev_priv
))
407 return vlv_check_for_unclaimed_mmio(dev_priv
);
412 static void __intel_uncore_early_sanitize(struct drm_i915_private
*dev_priv
,
413 bool restore_forcewake
)
415 struct intel_device_info
*info
= mkwrite_device_info(dev_priv
);
417 /* clear out unclaimed reg detection bit */
418 if (check_for_unclaimed_mmio(dev_priv
))
419 DRM_DEBUG("unclaimed mmio detected on uncore init, clearing\n");
421 /* clear out old GT FIFO errors */
422 if (IS_GEN6(dev_priv
) || IS_GEN7(dev_priv
))
423 __raw_i915_write32(dev_priv
, GTFIFODBG
,
424 __raw_i915_read32(dev_priv
, GTFIFODBG
));
426 /* WaDisableShadowRegForCpd:chv */
427 if (IS_CHERRYVIEW(dev_priv
)) {
428 __raw_i915_write32(dev_priv
, GTFIFOCTL
,
429 __raw_i915_read32(dev_priv
, GTFIFOCTL
) |
430 GT_FIFO_CTL_BLOCK_ALL_POLICY_STALL
|
431 GT_FIFO_CTL_RC6_POLICY_STALL
);
434 if (IS_BXT_REVID(dev_priv
, 0, BXT_REVID_B_LAST
))
435 info
->has_decoupled_mmio
= false;
437 intel_uncore_forcewake_reset(dev_priv
, restore_forcewake
);
440 void intel_uncore_suspend(struct drm_i915_private
*dev_priv
)
442 iosf_mbi_unregister_pmic_bus_access_notifier(
443 &dev_priv
->uncore
.pmic_bus_access_nb
);
444 intel_uncore_forcewake_reset(dev_priv
, false);
447 void intel_uncore_resume_early(struct drm_i915_private
*dev_priv
)
449 __intel_uncore_early_sanitize(dev_priv
, true);
450 iosf_mbi_register_pmic_bus_access_notifier(
451 &dev_priv
->uncore
.pmic_bus_access_nb
);
452 i915_check_and_clear_faults(dev_priv
);
455 void intel_uncore_sanitize(struct drm_i915_private
*dev_priv
)
457 i915
.enable_rc6
= sanitize_rc6_option(dev_priv
, i915
.enable_rc6
);
459 /* BIOS often leaves RC6 enabled, but disable it for hw init */
460 intel_sanitize_gt_powersave(dev_priv
);
463 static void __intel_uncore_forcewake_get(struct drm_i915_private
*dev_priv
,
464 enum forcewake_domains fw_domains
)
466 struct intel_uncore_forcewake_domain
*domain
;
468 fw_domains
&= dev_priv
->uncore
.fw_domains
;
470 for_each_fw_domain_masked(domain
, fw_domains
, dev_priv
) {
471 if (domain
->wake_count
++)
472 fw_domains
&= ~domain
->mask
;
476 dev_priv
->uncore
.funcs
.force_wake_get(dev_priv
, fw_domains
);
480 * intel_uncore_forcewake_get - grab forcewake domain references
481 * @dev_priv: i915 device instance
482 * @fw_domains: forcewake domains to get reference on
484 * This function can be used get GT's forcewake domain references.
485 * Normal register access will handle the forcewake domains automatically.
486 * However if some sequence requires the GT to not power down a particular
487 * forcewake domains this function should be called at the beginning of the
488 * sequence. And subsequently the reference should be dropped by symmetric
489 * call to intel_unforce_forcewake_put(). Usually caller wants all the domains
490 * to be kept awake so the @fw_domains would be then FORCEWAKE_ALL.
492 void intel_uncore_forcewake_get(struct drm_i915_private
*dev_priv
,
493 enum forcewake_domains fw_domains
)
495 unsigned long irqflags
;
497 if (!dev_priv
->uncore
.funcs
.force_wake_get
)
500 assert_rpm_wakelock_held(dev_priv
);
502 spin_lock_irqsave(&dev_priv
->uncore
.lock
, irqflags
);
503 __intel_uncore_forcewake_get(dev_priv
, fw_domains
);
504 spin_unlock_irqrestore(&dev_priv
->uncore
.lock
, irqflags
);
508 * intel_uncore_forcewake_get__locked - grab forcewake domain references
509 * @dev_priv: i915 device instance
510 * @fw_domains: forcewake domains to get reference on
512 * See intel_uncore_forcewake_get(). This variant places the onus
513 * on the caller to explicitly handle the dev_priv->uncore.lock spinlock.
515 void intel_uncore_forcewake_get__locked(struct drm_i915_private
*dev_priv
,
516 enum forcewake_domains fw_domains
)
518 lockdep_assert_held(&dev_priv
->uncore
.lock
);
520 if (!dev_priv
->uncore
.funcs
.force_wake_get
)
523 __intel_uncore_forcewake_get(dev_priv
, fw_domains
);
526 static void __intel_uncore_forcewake_put(struct drm_i915_private
*dev_priv
,
527 enum forcewake_domains fw_domains
)
529 struct intel_uncore_forcewake_domain
*domain
;
531 fw_domains
&= dev_priv
->uncore
.fw_domains
;
533 for_each_fw_domain_masked(domain
, fw_domains
, dev_priv
) {
534 if (WARN_ON(domain
->wake_count
== 0))
537 if (--domain
->wake_count
)
540 fw_domain_arm_timer(domain
);
545 * intel_uncore_forcewake_put - release a forcewake domain reference
546 * @dev_priv: i915 device instance
547 * @fw_domains: forcewake domains to put references
549 * This function drops the device-level forcewakes for specified
550 * domains obtained by intel_uncore_forcewake_get().
552 void intel_uncore_forcewake_put(struct drm_i915_private
*dev_priv
,
553 enum forcewake_domains fw_domains
)
555 unsigned long irqflags
;
557 if (!dev_priv
->uncore
.funcs
.force_wake_put
)
560 spin_lock_irqsave(&dev_priv
->uncore
.lock
, irqflags
);
561 __intel_uncore_forcewake_put(dev_priv
, fw_domains
);
562 spin_unlock_irqrestore(&dev_priv
->uncore
.lock
, irqflags
);
566 * intel_uncore_forcewake_put__locked - grab forcewake domain references
567 * @dev_priv: i915 device instance
568 * @fw_domains: forcewake domains to get reference on
570 * See intel_uncore_forcewake_put(). This variant places the onus
571 * on the caller to explicitly handle the dev_priv->uncore.lock spinlock.
573 void intel_uncore_forcewake_put__locked(struct drm_i915_private
*dev_priv
,
574 enum forcewake_domains fw_domains
)
576 lockdep_assert_held(&dev_priv
->uncore
.lock
);
578 if (!dev_priv
->uncore
.funcs
.force_wake_put
)
581 __intel_uncore_forcewake_put(dev_priv
, fw_domains
);
584 void assert_forcewakes_inactive(struct drm_i915_private
*dev_priv
)
586 if (!dev_priv
->uncore
.funcs
.force_wake_get
)
589 WARN_ON(dev_priv
->uncore
.fw_domains_active
);
592 /* We give fast paths for the really cool registers */
593 #define NEEDS_FORCE_WAKE(reg) ((reg) < 0x40000)
595 #define __gen6_reg_read_fw_domains(offset) \
597 enum forcewake_domains __fwd; \
598 if (NEEDS_FORCE_WAKE(offset)) \
599 __fwd = FORCEWAKE_RENDER; \
605 static int fw_range_cmp(u32 offset
, const struct intel_forcewake_range
*entry
)
607 if (offset
< entry
->start
)
609 else if (offset
> entry
->end
)
615 /* Copied and "macroized" from lib/bsearch.c */
616 #define BSEARCH(key, base, num, cmp) ({ \
617 unsigned int start__ = 0, end__ = (num); \
618 typeof(base) result__ = NULL; \
619 while (start__ < end__) { \
620 unsigned int mid__ = start__ + (end__ - start__) / 2; \
621 int ret__ = (cmp)((key), (base) + mid__); \
624 } else if (ret__ > 0) { \
625 start__ = mid__ + 1; \
627 result__ = (base) + mid__; \
634 static enum forcewake_domains
635 find_fw_domain(struct drm_i915_private
*dev_priv
, u32 offset
)
637 const struct intel_forcewake_range
*entry
;
639 entry
= BSEARCH(offset
,
640 dev_priv
->uncore
.fw_domains_table
,
641 dev_priv
->uncore
.fw_domains_table_entries
,
647 WARN(entry
->domains
& ~dev_priv
->uncore
.fw_domains
,
648 "Uninitialized forcewake domain(s) 0x%x accessed at 0x%x\n",
649 entry
->domains
& ~dev_priv
->uncore
.fw_domains
, offset
);
651 return entry
->domains
;
654 #define GEN_FW_RANGE(s, e, d) \
655 { .start = (s), .end = (e), .domains = (d) }
657 #define HAS_FWTABLE(dev_priv) \
658 (IS_GEN9(dev_priv) || \
659 IS_CHERRYVIEW(dev_priv) || \
660 IS_VALLEYVIEW(dev_priv))
662 /* *Must* be sorted by offset ranges! See intel_fw_table_check(). */
663 static const struct intel_forcewake_range __vlv_fw_ranges
[] = {
664 GEN_FW_RANGE(0x2000, 0x3fff, FORCEWAKE_RENDER
),
665 GEN_FW_RANGE(0x5000, 0x7fff, FORCEWAKE_RENDER
),
666 GEN_FW_RANGE(0xb000, 0x11fff, FORCEWAKE_RENDER
),
667 GEN_FW_RANGE(0x12000, 0x13fff, FORCEWAKE_MEDIA
),
668 GEN_FW_RANGE(0x22000, 0x23fff, FORCEWAKE_MEDIA
),
669 GEN_FW_RANGE(0x2e000, 0x2ffff, FORCEWAKE_RENDER
),
670 GEN_FW_RANGE(0x30000, 0x3ffff, FORCEWAKE_MEDIA
),
673 #define __fwtable_reg_read_fw_domains(offset) \
675 enum forcewake_domains __fwd = 0; \
676 if (NEEDS_FORCE_WAKE((offset))) \
677 __fwd = find_fw_domain(dev_priv, offset); \
681 /* *Must* be sorted by offset! See intel_shadow_table_check(). */
682 static const i915_reg_t gen8_shadowed_regs
[] = {
683 RING_TAIL(RENDER_RING_BASE
), /* 0x2000 (base) */
684 GEN6_RPNSWREQ
, /* 0xA008 */
685 GEN6_RC_VIDEO_FREQ
, /* 0xA00C */
686 RING_TAIL(GEN6_BSD_RING_BASE
), /* 0x12000 (base) */
687 RING_TAIL(VEBOX_RING_BASE
), /* 0x1a000 (base) */
688 RING_TAIL(BLT_RING_BASE
), /* 0x22000 (base) */
689 /* TODO: Other registers are not yet used */
692 static int mmio_reg_cmp(u32 key
, const i915_reg_t
*reg
)
694 u32 offset
= i915_mmio_reg_offset(*reg
);
698 else if (key
> offset
)
704 static bool is_gen8_shadowed(u32 offset
)
706 const i915_reg_t
*regs
= gen8_shadowed_regs
;
708 return BSEARCH(offset
, regs
, ARRAY_SIZE(gen8_shadowed_regs
),
712 #define __gen8_reg_write_fw_domains(offset) \
714 enum forcewake_domains __fwd; \
715 if (NEEDS_FORCE_WAKE(offset) && !is_gen8_shadowed(offset)) \
716 __fwd = FORCEWAKE_RENDER; \
722 /* *Must* be sorted by offset ranges! See intel_fw_table_check(). */
723 static const struct intel_forcewake_range __chv_fw_ranges
[] = {
724 GEN_FW_RANGE(0x2000, 0x3fff, FORCEWAKE_RENDER
),
725 GEN_FW_RANGE(0x4000, 0x4fff, FORCEWAKE_RENDER
| FORCEWAKE_MEDIA
),
726 GEN_FW_RANGE(0x5200, 0x7fff, FORCEWAKE_RENDER
),
727 GEN_FW_RANGE(0x8000, 0x82ff, FORCEWAKE_RENDER
| FORCEWAKE_MEDIA
),
728 GEN_FW_RANGE(0x8300, 0x84ff, FORCEWAKE_RENDER
),
729 GEN_FW_RANGE(0x8500, 0x85ff, FORCEWAKE_RENDER
| FORCEWAKE_MEDIA
),
730 GEN_FW_RANGE(0x8800, 0x88ff, FORCEWAKE_MEDIA
),
731 GEN_FW_RANGE(0x9000, 0xafff, FORCEWAKE_RENDER
| FORCEWAKE_MEDIA
),
732 GEN_FW_RANGE(0xb000, 0xb47f, FORCEWAKE_RENDER
),
733 GEN_FW_RANGE(0xd000, 0xd7ff, FORCEWAKE_MEDIA
),
734 GEN_FW_RANGE(0xe000, 0xe7ff, FORCEWAKE_RENDER
),
735 GEN_FW_RANGE(0xf000, 0xffff, FORCEWAKE_RENDER
| FORCEWAKE_MEDIA
),
736 GEN_FW_RANGE(0x12000, 0x13fff, FORCEWAKE_MEDIA
),
737 GEN_FW_RANGE(0x1a000, 0x1bfff, FORCEWAKE_MEDIA
),
738 GEN_FW_RANGE(0x1e800, 0x1e9ff, FORCEWAKE_MEDIA
),
739 GEN_FW_RANGE(0x30000, 0x37fff, FORCEWAKE_MEDIA
),
742 #define __fwtable_reg_write_fw_domains(offset) \
744 enum forcewake_domains __fwd = 0; \
745 if (NEEDS_FORCE_WAKE((offset)) && !is_gen8_shadowed(offset)) \
746 __fwd = find_fw_domain(dev_priv, offset); \
750 /* *Must* be sorted by offset ranges! See intel_fw_table_check(). */
751 static const struct intel_forcewake_range __gen9_fw_ranges
[] = {
752 GEN_FW_RANGE(0x0, 0xaff, FORCEWAKE_BLITTER
),
753 GEN_FW_RANGE(0xb00, 0x1fff, 0), /* uncore range */
754 GEN_FW_RANGE(0x2000, 0x26ff, FORCEWAKE_RENDER
),
755 GEN_FW_RANGE(0x2700, 0x2fff, FORCEWAKE_BLITTER
),
756 GEN_FW_RANGE(0x3000, 0x3fff, FORCEWAKE_RENDER
),
757 GEN_FW_RANGE(0x4000, 0x51ff, FORCEWAKE_BLITTER
),
758 GEN_FW_RANGE(0x5200, 0x7fff, FORCEWAKE_RENDER
),
759 GEN_FW_RANGE(0x8000, 0x812f, FORCEWAKE_BLITTER
),
760 GEN_FW_RANGE(0x8130, 0x813f, FORCEWAKE_MEDIA
),
761 GEN_FW_RANGE(0x8140, 0x815f, FORCEWAKE_RENDER
),
762 GEN_FW_RANGE(0x8160, 0x82ff, FORCEWAKE_BLITTER
),
763 GEN_FW_RANGE(0x8300, 0x84ff, FORCEWAKE_RENDER
),
764 GEN_FW_RANGE(0x8500, 0x87ff, FORCEWAKE_BLITTER
),
765 GEN_FW_RANGE(0x8800, 0x89ff, FORCEWAKE_MEDIA
),
766 GEN_FW_RANGE(0x8a00, 0x8bff, FORCEWAKE_BLITTER
),
767 GEN_FW_RANGE(0x8c00, 0x8cff, FORCEWAKE_RENDER
),
768 GEN_FW_RANGE(0x8d00, 0x93ff, FORCEWAKE_BLITTER
),
769 GEN_FW_RANGE(0x9400, 0x97ff, FORCEWAKE_RENDER
| FORCEWAKE_MEDIA
),
770 GEN_FW_RANGE(0x9800, 0xafff, FORCEWAKE_BLITTER
),
771 GEN_FW_RANGE(0xb000, 0xb47f, FORCEWAKE_RENDER
),
772 GEN_FW_RANGE(0xb480, 0xcfff, FORCEWAKE_BLITTER
),
773 GEN_FW_RANGE(0xd000, 0xd7ff, FORCEWAKE_MEDIA
),
774 GEN_FW_RANGE(0xd800, 0xdfff, FORCEWAKE_BLITTER
),
775 GEN_FW_RANGE(0xe000, 0xe8ff, FORCEWAKE_RENDER
),
776 GEN_FW_RANGE(0xe900, 0x11fff, FORCEWAKE_BLITTER
),
777 GEN_FW_RANGE(0x12000, 0x13fff, FORCEWAKE_MEDIA
),
778 GEN_FW_RANGE(0x14000, 0x19fff, FORCEWAKE_BLITTER
),
779 GEN_FW_RANGE(0x1a000, 0x1e9ff, FORCEWAKE_MEDIA
),
780 GEN_FW_RANGE(0x1ea00, 0x243ff, FORCEWAKE_BLITTER
),
781 GEN_FW_RANGE(0x24400, 0x247ff, FORCEWAKE_RENDER
),
782 GEN_FW_RANGE(0x24800, 0x2ffff, FORCEWAKE_BLITTER
),
783 GEN_FW_RANGE(0x30000, 0x3ffff, FORCEWAKE_MEDIA
),
787 ilk_dummy_write(struct drm_i915_private
*dev_priv
)
789 /* WaIssueDummyWriteToWakeupFromRC6:ilk Issue a dummy write to wake up
790 * the chip from rc6 before touching it for real. MI_MODE is masked,
791 * hence harmless to write 0 into. */
792 __raw_i915_write32(dev_priv
, MI_MODE
, 0);
796 __unclaimed_reg_debug(struct drm_i915_private
*dev_priv
,
797 const i915_reg_t reg
,
801 if (WARN(check_for_unclaimed_mmio(dev_priv
) && !before
,
802 "Unclaimed %s register 0x%x\n",
803 read
? "read from" : "write to",
804 i915_mmio_reg_offset(reg
)))
805 i915
.mmio_debug
--; /* Only report the first N failures */
809 unclaimed_reg_debug(struct drm_i915_private
*dev_priv
,
810 const i915_reg_t reg
,
814 if (likely(!i915
.mmio_debug
))
817 __unclaimed_reg_debug(dev_priv
, reg
, read
, before
);
820 static const enum decoupled_power_domain fw2dpd_domain
[] = {
821 GEN9_DECOUPLED_PD_RENDER
,
822 GEN9_DECOUPLED_PD_BLITTER
,
823 GEN9_DECOUPLED_PD_ALL
,
824 GEN9_DECOUPLED_PD_MEDIA
,
825 GEN9_DECOUPLED_PD_ALL
,
826 GEN9_DECOUPLED_PD_ALL
,
827 GEN9_DECOUPLED_PD_ALL
831 * Decoupled MMIO access for only 1 DWORD
833 static void __gen9_decoupled_mmio_access(struct drm_i915_private
*dev_priv
,
835 enum forcewake_domains fw_domain
,
836 enum decoupled_ops operation
)
838 enum decoupled_power_domain dp_domain
;
839 u32 ctrl_reg_data
= 0;
841 dp_domain
= fw2dpd_domain
[fw_domain
- 1];
843 ctrl_reg_data
|= reg
;
844 ctrl_reg_data
|= (operation
<< GEN9_DECOUPLED_OP_SHIFT
);
845 ctrl_reg_data
|= (dp_domain
<< GEN9_DECOUPLED_PD_SHIFT
);
846 ctrl_reg_data
|= GEN9_DECOUPLED_DW1_GO
;
847 __raw_i915_write32(dev_priv
, GEN9_DECOUPLED_REG0_DW1
, ctrl_reg_data
);
849 if (wait_for_atomic((__raw_i915_read32(dev_priv
,
850 GEN9_DECOUPLED_REG0_DW1
) &
851 GEN9_DECOUPLED_DW1_GO
) == 0,
852 FORCEWAKE_ACK_TIMEOUT_MS
))
853 DRM_ERROR("Decoupled MMIO wait timed out\n");
857 __gen9_decoupled_mmio_read32(struct drm_i915_private
*dev_priv
,
859 enum forcewake_domains fw_domain
)
861 __gen9_decoupled_mmio_access(dev_priv
, reg
, fw_domain
,
862 GEN9_DECOUPLED_OP_READ
);
864 return __raw_i915_read32(dev_priv
, GEN9_DECOUPLED_REG0_DW0
);
868 __gen9_decoupled_mmio_write(struct drm_i915_private
*dev_priv
,
870 enum forcewake_domains fw_domain
)
873 __raw_i915_write32(dev_priv
, GEN9_DECOUPLED_REG0_DW0
, data
);
875 __gen9_decoupled_mmio_access(dev_priv
, reg
, fw_domain
,
876 GEN9_DECOUPLED_OP_WRITE
);
880 #define GEN2_READ_HEADER(x) \
882 assert_rpm_wakelock_held(dev_priv);
884 #define GEN2_READ_FOOTER \
885 trace_i915_reg_rw(false, reg, val, sizeof(val), trace); \
888 #define __gen2_read(x) \
890 gen2_read##x(struct drm_i915_private *dev_priv, i915_reg_t reg, bool trace) { \
891 GEN2_READ_HEADER(x); \
892 val = __raw_i915_read##x(dev_priv, reg); \
896 #define __gen5_read(x) \
898 gen5_read##x(struct drm_i915_private *dev_priv, i915_reg_t reg, bool trace) { \
899 GEN2_READ_HEADER(x); \
900 ilk_dummy_write(dev_priv); \
901 val = __raw_i915_read##x(dev_priv, reg); \
917 #undef GEN2_READ_FOOTER
918 #undef GEN2_READ_HEADER
920 #define GEN6_READ_HEADER(x) \
921 u32 offset = i915_mmio_reg_offset(reg); \
922 unsigned long irqflags; \
924 assert_rpm_wakelock_held(dev_priv); \
925 spin_lock_irqsave(&dev_priv->uncore.lock, irqflags); \
926 unclaimed_reg_debug(dev_priv, reg, true, true)
928 #define GEN6_READ_FOOTER \
929 unclaimed_reg_debug(dev_priv, reg, true, false); \
930 spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags); \
931 trace_i915_reg_rw(false, reg, val, sizeof(val), trace); \
934 static noinline
void ___force_wake_auto(struct drm_i915_private
*dev_priv
,
935 enum forcewake_domains fw_domains
)
937 struct intel_uncore_forcewake_domain
*domain
;
939 for_each_fw_domain_masked(domain
, fw_domains
, dev_priv
)
940 fw_domain_arm_timer(domain
);
942 dev_priv
->uncore
.funcs
.force_wake_get(dev_priv
, fw_domains
);
945 static inline void __force_wake_auto(struct drm_i915_private
*dev_priv
,
946 enum forcewake_domains fw_domains
)
948 if (WARN_ON(!fw_domains
))
951 /* Turn on all requested but inactive supported forcewake domains. */
952 fw_domains
&= dev_priv
->uncore
.fw_domains
;
953 fw_domains
&= ~dev_priv
->uncore
.fw_domains_active
;
956 ___force_wake_auto(dev_priv
, fw_domains
);
959 #define __gen_read(func, x) \
961 func##_read##x(struct drm_i915_private *dev_priv, i915_reg_t reg, bool trace) { \
962 enum forcewake_domains fw_engine; \
963 GEN6_READ_HEADER(x); \
964 fw_engine = __##func##_reg_read_fw_domains(offset); \
966 __force_wake_auto(dev_priv, fw_engine); \
967 val = __raw_i915_read##x(dev_priv, reg); \
970 #define __gen6_read(x) __gen_read(gen6, x)
971 #define __fwtable_read(x) __gen_read(fwtable, x)
973 #define __gen9_decoupled_read(x) \
975 gen9_decoupled_read##x(struct drm_i915_private *dev_priv, \
976 i915_reg_t reg, bool trace) { \
977 enum forcewake_domains fw_engine; \
978 GEN6_READ_HEADER(x); \
979 fw_engine = __fwtable_reg_read_fw_domains(offset); \
980 if (fw_engine & ~dev_priv->uncore.fw_domains_active) { \
982 u32 *ptr_data = (u32 *) &val; \
983 for (i = 0; i < x/32; i++, offset += sizeof(u32), ptr_data++) \
984 *ptr_data = __gen9_decoupled_mmio_read32(dev_priv, \
988 val = __raw_i915_read##x(dev_priv, reg); \
993 __gen9_decoupled_read(32)
994 __gen9_decoupled_read(64)
1004 #undef __fwtable_read
1006 #undef GEN6_READ_FOOTER
1007 #undef GEN6_READ_HEADER
1009 #define GEN2_WRITE_HEADER \
1010 trace_i915_reg_rw(true, reg, val, sizeof(val), trace); \
1011 assert_rpm_wakelock_held(dev_priv); \
1013 #define GEN2_WRITE_FOOTER
1015 #define __gen2_write(x) \
1017 gen2_write##x(struct drm_i915_private *dev_priv, i915_reg_t reg, u##x val, bool trace) { \
1018 GEN2_WRITE_HEADER; \
1019 __raw_i915_write##x(dev_priv, reg, val); \
1020 GEN2_WRITE_FOOTER; \
1023 #define __gen5_write(x) \
1025 gen5_write##x(struct drm_i915_private *dev_priv, i915_reg_t reg, u##x val, bool trace) { \
1026 GEN2_WRITE_HEADER; \
1027 ilk_dummy_write(dev_priv); \
1028 __raw_i915_write##x(dev_priv, reg, val); \
1029 GEN2_WRITE_FOOTER; \
1042 #undef GEN2_WRITE_FOOTER
1043 #undef GEN2_WRITE_HEADER
1045 #define GEN6_WRITE_HEADER \
1046 u32 offset = i915_mmio_reg_offset(reg); \
1047 unsigned long irqflags; \
1048 trace_i915_reg_rw(true, reg, val, sizeof(val), trace); \
1049 assert_rpm_wakelock_held(dev_priv); \
1050 spin_lock_irqsave(&dev_priv->uncore.lock, irqflags); \
1051 unclaimed_reg_debug(dev_priv, reg, false, true)
1053 #define GEN6_WRITE_FOOTER \
1054 unclaimed_reg_debug(dev_priv, reg, false, false); \
1055 spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags)
1057 #define __gen6_write(x) \
1059 gen6_write##x(struct drm_i915_private *dev_priv, i915_reg_t reg, u##x val, bool trace) { \
1060 u32 __fifo_ret = 0; \
1061 GEN6_WRITE_HEADER; \
1062 if (NEEDS_FORCE_WAKE(offset)) { \
1063 __fifo_ret = __gen6_gt_wait_for_fifo(dev_priv); \
1065 __raw_i915_write##x(dev_priv, reg, val); \
1066 if (unlikely(__fifo_ret)) { \
1067 gen6_gt_check_fifodbg(dev_priv); \
1069 GEN6_WRITE_FOOTER; \
1072 #define __gen_write(func, x) \
1074 func##_write##x(struct drm_i915_private *dev_priv, i915_reg_t reg, u##x val, bool trace) { \
1075 enum forcewake_domains fw_engine; \
1076 GEN6_WRITE_HEADER; \
1077 fw_engine = __##func##_reg_write_fw_domains(offset); \
1079 __force_wake_auto(dev_priv, fw_engine); \
1080 __raw_i915_write##x(dev_priv, reg, val); \
1081 GEN6_WRITE_FOOTER; \
1083 #define __gen8_write(x) __gen_write(gen8, x)
1084 #define __fwtable_write(x) __gen_write(fwtable, x)
1086 #define __gen9_decoupled_write(x) \
1088 gen9_decoupled_write##x(struct drm_i915_private *dev_priv, \
1089 i915_reg_t reg, u##x val, \
1091 enum forcewake_domains fw_engine; \
1092 GEN6_WRITE_HEADER; \
1093 fw_engine = __fwtable_reg_write_fw_domains(offset); \
1094 if (fw_engine & ~dev_priv->uncore.fw_domains_active) \
1095 __gen9_decoupled_mmio_write(dev_priv, \
1100 __raw_i915_write##x(dev_priv, reg, val); \
1101 GEN6_WRITE_FOOTER; \
1104 __gen9_decoupled_write(32)
1115 #undef __fwtable_write
1118 #undef GEN6_WRITE_FOOTER
1119 #undef GEN6_WRITE_HEADER
1121 #define ASSIGN_WRITE_MMIO_VFUNCS(x) \
1123 dev_priv->uncore.funcs.mmio_writeb = x##_write8; \
1124 dev_priv->uncore.funcs.mmio_writew = x##_write16; \
1125 dev_priv->uncore.funcs.mmio_writel = x##_write32; \
1128 #define ASSIGN_READ_MMIO_VFUNCS(x) \
1130 dev_priv->uncore.funcs.mmio_readb = x##_read8; \
1131 dev_priv->uncore.funcs.mmio_readw = x##_read16; \
1132 dev_priv->uncore.funcs.mmio_readl = x##_read32; \
1133 dev_priv->uncore.funcs.mmio_readq = x##_read64; \
1137 static void fw_domain_init(struct drm_i915_private
*dev_priv
,
1138 enum forcewake_domain_id domain_id
,
1142 struct intel_uncore_forcewake_domain
*d
;
1144 if (WARN_ON(domain_id
>= FW_DOMAIN_ID_COUNT
))
1147 d
= &dev_priv
->uncore
.fw_domain
[domain_id
];
1149 WARN_ON(d
->wake_count
);
1152 d
->reg_set
= reg_set
;
1153 d
->reg_ack
= reg_ack
;
1155 if (IS_GEN6(dev_priv
)) {
1157 d
->val_set
= FORCEWAKE_KERNEL
;
1160 /* WaRsClearFWBitsAtReset:bdw,skl */
1161 d
->val_reset
= _MASKED_BIT_DISABLE(0xffff);
1162 d
->val_set
= _MASKED_BIT_ENABLE(FORCEWAKE_KERNEL
);
1163 d
->val_clear
= _MASKED_BIT_DISABLE(FORCEWAKE_KERNEL
);
1166 if (IS_VALLEYVIEW(dev_priv
) || IS_CHERRYVIEW(dev_priv
))
1167 d
->reg_post
= FORCEWAKE_ACK_VLV
;
1168 else if (IS_GEN6(dev_priv
) || IS_GEN7(dev_priv
) || IS_GEN8(dev_priv
))
1169 d
->reg_post
= ECOBUS
;
1174 BUILD_BUG_ON(FORCEWAKE_RENDER
!= (1 << FW_DOMAIN_ID_RENDER
));
1175 BUILD_BUG_ON(FORCEWAKE_BLITTER
!= (1 << FW_DOMAIN_ID_BLITTER
));
1176 BUILD_BUG_ON(FORCEWAKE_MEDIA
!= (1 << FW_DOMAIN_ID_MEDIA
));
1178 d
->mask
= 1 << domain_id
;
1180 hrtimer_init(&d
->timer
, CLOCK_MONOTONIC
, HRTIMER_MODE_REL
);
1181 d
->timer
.function
= intel_uncore_fw_release_timer
;
1183 dev_priv
->uncore
.fw_domains
|= (1 << domain_id
);
1188 static void intel_uncore_fw_domains_init(struct drm_i915_private
*dev_priv
)
1190 if (INTEL_INFO(dev_priv
)->gen
<= 5)
1193 if (IS_GEN9(dev_priv
)) {
1194 dev_priv
->uncore
.funcs
.force_wake_get
= fw_domains_get
;
1195 dev_priv
->uncore
.funcs
.force_wake_put
= fw_domains_put
;
1196 fw_domain_init(dev_priv
, FW_DOMAIN_ID_RENDER
,
1197 FORCEWAKE_RENDER_GEN9
,
1198 FORCEWAKE_ACK_RENDER_GEN9
);
1199 fw_domain_init(dev_priv
, FW_DOMAIN_ID_BLITTER
,
1200 FORCEWAKE_BLITTER_GEN9
,
1201 FORCEWAKE_ACK_BLITTER_GEN9
);
1202 fw_domain_init(dev_priv
, FW_DOMAIN_ID_MEDIA
,
1203 FORCEWAKE_MEDIA_GEN9
, FORCEWAKE_ACK_MEDIA_GEN9
);
1204 } else if (IS_VALLEYVIEW(dev_priv
) || IS_CHERRYVIEW(dev_priv
)) {
1205 dev_priv
->uncore
.funcs
.force_wake_get
= fw_domains_get
;
1206 if (!IS_CHERRYVIEW(dev_priv
))
1207 dev_priv
->uncore
.funcs
.force_wake_put
=
1208 fw_domains_put_with_fifo
;
1210 dev_priv
->uncore
.funcs
.force_wake_put
= fw_domains_put
;
1211 fw_domain_init(dev_priv
, FW_DOMAIN_ID_RENDER
,
1212 FORCEWAKE_VLV
, FORCEWAKE_ACK_VLV
);
1213 fw_domain_init(dev_priv
, FW_DOMAIN_ID_MEDIA
,
1214 FORCEWAKE_MEDIA_VLV
, FORCEWAKE_ACK_MEDIA_VLV
);
1215 } else if (IS_HASWELL(dev_priv
) || IS_BROADWELL(dev_priv
)) {
1216 dev_priv
->uncore
.funcs
.force_wake_get
=
1217 fw_domains_get_with_thread_status
;
1218 if (IS_HASWELL(dev_priv
))
1219 dev_priv
->uncore
.funcs
.force_wake_put
=
1220 fw_domains_put_with_fifo
;
1222 dev_priv
->uncore
.funcs
.force_wake_put
= fw_domains_put
;
1223 fw_domain_init(dev_priv
, FW_DOMAIN_ID_RENDER
,
1224 FORCEWAKE_MT
, FORCEWAKE_ACK_HSW
);
1225 } else if (IS_IVYBRIDGE(dev_priv
)) {
1228 /* IVB configs may use multi-threaded forcewake */
1230 /* A small trick here - if the bios hasn't configured
1231 * MT forcewake, and if the device is in RC6, then
1232 * force_wake_mt_get will not wake the device and the
1233 * ECOBUS read will return zero. Which will be
1234 * (correctly) interpreted by the test below as MT
1235 * forcewake being disabled.
1237 dev_priv
->uncore
.funcs
.force_wake_get
=
1238 fw_domains_get_with_thread_status
;
1239 dev_priv
->uncore
.funcs
.force_wake_put
=
1240 fw_domains_put_with_fifo
;
1242 /* We need to init first for ECOBUS access and then
1243 * determine later if we want to reinit, in case of MT access is
1244 * not working. In this stage we don't know which flavour this
1245 * ivb is, so it is better to reset also the gen6 fw registers
1246 * before the ecobus check.
1249 __raw_i915_write32(dev_priv
, FORCEWAKE
, 0);
1250 __raw_posting_read(dev_priv
, ECOBUS
);
1252 fw_domain_init(dev_priv
, FW_DOMAIN_ID_RENDER
,
1253 FORCEWAKE_MT
, FORCEWAKE_MT_ACK
);
1255 spin_lock_irq(&dev_priv
->uncore
.lock
);
1256 fw_domains_get_with_thread_status(dev_priv
, FORCEWAKE_ALL
);
1257 ecobus
= __raw_i915_read32(dev_priv
, ECOBUS
);
1258 fw_domains_put_with_fifo(dev_priv
, FORCEWAKE_ALL
);
1259 spin_unlock_irq(&dev_priv
->uncore
.lock
);
1261 if (!(ecobus
& FORCEWAKE_MT_ENABLE
)) {
1262 DRM_INFO("No MT forcewake available on Ivybridge, this can result in issues\n");
1263 DRM_INFO("when using vblank-synced partial screen updates.\n");
1264 fw_domain_init(dev_priv
, FW_DOMAIN_ID_RENDER
,
1265 FORCEWAKE
, FORCEWAKE_ACK
);
1267 } else if (IS_GEN6(dev_priv
)) {
1268 dev_priv
->uncore
.funcs
.force_wake_get
=
1269 fw_domains_get_with_thread_status
;
1270 dev_priv
->uncore
.funcs
.force_wake_put
=
1271 fw_domains_put_with_fifo
;
1272 fw_domain_init(dev_priv
, FW_DOMAIN_ID_RENDER
,
1273 FORCEWAKE
, FORCEWAKE_ACK
);
1276 if (intel_vgpu_active(dev_priv
)) {
1277 dev_priv
->uncore
.funcs
.force_wake_get
= vgpu_fw_domains_nop
;
1278 dev_priv
->uncore
.funcs
.force_wake_put
= vgpu_fw_domains_nop
;
1281 /* All future platforms are expected to require complex power gating */
1282 WARN_ON(dev_priv
->uncore
.fw_domains
== 0);
1285 #define ASSIGN_FW_DOMAINS_TABLE(d) \
1287 dev_priv->uncore.fw_domains_table = \
1288 (struct intel_forcewake_range *)(d); \
1289 dev_priv->uncore.fw_domains_table_entries = ARRAY_SIZE((d)); \
1292 static int i915_pmic_bus_access_notifier(struct notifier_block
*nb
,
1293 unsigned long action
, void *data
)
1295 struct drm_i915_private
*dev_priv
= container_of(nb
,
1296 struct drm_i915_private
, uncore
.pmic_bus_access_nb
);
1299 case MBI_PMIC_BUS_ACCESS_BEGIN
:
1301 * forcewake all now to make sure that we don't need to do a
1302 * forcewake later which on systems where this notifier gets
1303 * called requires the punit to access to the shared pmic i2c
1304 * bus, which will be busy after this notification, leading to:
1305 * "render: timed out waiting for forcewake ack request."
1308 intel_uncore_forcewake_get(dev_priv
, FORCEWAKE_ALL
);
1310 case MBI_PMIC_BUS_ACCESS_END
:
1311 intel_uncore_forcewake_put(dev_priv
, FORCEWAKE_ALL
);
1318 void intel_uncore_init(struct drm_i915_private
*dev_priv
)
1320 i915_check_vgpu(dev_priv
);
1322 intel_uncore_edram_detect(dev_priv
);
1323 intel_uncore_fw_domains_init(dev_priv
);
1324 __intel_uncore_early_sanitize(dev_priv
, false);
1326 dev_priv
->uncore
.unclaimed_mmio_check
= 1;
1327 dev_priv
->uncore
.pmic_bus_access_nb
.notifier_call
=
1328 i915_pmic_bus_access_notifier
;
1330 switch (INTEL_INFO(dev_priv
)->gen
) {
1333 ASSIGN_FW_DOMAINS_TABLE(__gen9_fw_ranges
);
1334 ASSIGN_WRITE_MMIO_VFUNCS(fwtable
);
1335 ASSIGN_READ_MMIO_VFUNCS(fwtable
);
1336 if (HAS_DECOUPLED_MMIO(dev_priv
)) {
1337 dev_priv
->uncore
.funcs
.mmio_readl
=
1338 gen9_decoupled_read32
;
1339 dev_priv
->uncore
.funcs
.mmio_readq
=
1340 gen9_decoupled_read64
;
1341 dev_priv
->uncore
.funcs
.mmio_writel
=
1342 gen9_decoupled_write32
;
1346 if (IS_CHERRYVIEW(dev_priv
)) {
1347 ASSIGN_FW_DOMAINS_TABLE(__chv_fw_ranges
);
1348 ASSIGN_WRITE_MMIO_VFUNCS(fwtable
);
1349 ASSIGN_READ_MMIO_VFUNCS(fwtable
);
1352 ASSIGN_WRITE_MMIO_VFUNCS(gen8
);
1353 ASSIGN_READ_MMIO_VFUNCS(gen6
);
1358 ASSIGN_WRITE_MMIO_VFUNCS(gen6
);
1360 if (IS_VALLEYVIEW(dev_priv
)) {
1361 ASSIGN_FW_DOMAINS_TABLE(__vlv_fw_ranges
);
1362 ASSIGN_READ_MMIO_VFUNCS(fwtable
);
1364 ASSIGN_READ_MMIO_VFUNCS(gen6
);
1368 ASSIGN_WRITE_MMIO_VFUNCS(gen5
);
1369 ASSIGN_READ_MMIO_VFUNCS(gen5
);
1374 ASSIGN_WRITE_MMIO_VFUNCS(gen2
);
1375 ASSIGN_READ_MMIO_VFUNCS(gen2
);
1379 iosf_mbi_register_pmic_bus_access_notifier(
1380 &dev_priv
->uncore
.pmic_bus_access_nb
);
1382 i915_check_and_clear_faults(dev_priv
);
1384 #undef ASSIGN_WRITE_MMIO_VFUNCS
1385 #undef ASSIGN_READ_MMIO_VFUNCS
1387 void intel_uncore_fini(struct drm_i915_private
*dev_priv
)
1389 iosf_mbi_unregister_pmic_bus_access_notifier(
1390 &dev_priv
->uncore
.pmic_bus_access_nb
);
1392 /* Paranoia: make sure we have disabled everything before we exit. */
1393 intel_uncore_sanitize(dev_priv
);
1394 intel_uncore_forcewake_reset(dev_priv
, false);
1397 #define GEN_RANGE(l, h) GENMASK((h) - 1, (l) - 1)
1399 static const struct register_whitelist
{
1400 i915_reg_t offset_ldw
, offset_udw
;
1402 /* supported gens, 0x10 for 4, 0x30 for 4 and 5, etc. */
1403 uint32_t gen_bitmask
;
1405 { .offset_ldw
= RING_TIMESTAMP(RENDER_RING_BASE
),
1406 .offset_udw
= RING_TIMESTAMP_UDW(RENDER_RING_BASE
),
1407 .size
= 8, .gen_bitmask
= GEN_RANGE(4, 9) },
1410 int i915_reg_read_ioctl(struct drm_device
*dev
,
1411 void *data
, struct drm_file
*file
)
1413 struct drm_i915_private
*dev_priv
= to_i915(dev
);
1414 struct drm_i915_reg_read
*reg
= data
;
1415 struct register_whitelist
const *entry
= whitelist
;
1417 i915_reg_t offset_ldw
, offset_udw
;
1420 for (i
= 0; i
< ARRAY_SIZE(whitelist
); i
++, entry
++) {
1421 if (i915_mmio_reg_offset(entry
->offset_ldw
) == (reg
->offset
& -entry
->size
) &&
1422 (INTEL_INFO(dev_priv
)->gen_mask
& entry
->gen_bitmask
))
1426 if (i
== ARRAY_SIZE(whitelist
))
1429 /* We use the low bits to encode extra flags as the register should
1430 * be naturally aligned (and those that are not so aligned merely
1431 * limit the available flags for that register).
1433 offset_ldw
= entry
->offset_ldw
;
1434 offset_udw
= entry
->offset_udw
;
1436 size
|= reg
->offset
^ i915_mmio_reg_offset(offset_ldw
);
1438 intel_runtime_pm_get(dev_priv
);
1442 reg
->val
= I915_READ64_2x32(offset_ldw
, offset_udw
);
1445 reg
->val
= I915_READ64(offset_ldw
);
1448 reg
->val
= I915_READ(offset_ldw
);
1451 reg
->val
= I915_READ16(offset_ldw
);
1454 reg
->val
= I915_READ8(offset_ldw
);
1462 intel_runtime_pm_put(dev_priv
);
1466 static int i915_reset_complete(struct pci_dev
*pdev
)
1469 pci_read_config_byte(pdev
, I915_GDRST
, &gdrst
);
1470 return (gdrst
& GRDOM_RESET_STATUS
) == 0;
1473 static int i915_do_reset(struct drm_i915_private
*dev_priv
, unsigned engine_mask
)
1475 struct pci_dev
*pdev
= dev_priv
->drm
.pdev
;
1477 /* assert reset for at least 20 usec */
1478 pci_write_config_byte(pdev
, I915_GDRST
, GRDOM_RESET_ENABLE
);
1480 pci_write_config_byte(pdev
, I915_GDRST
, 0);
1482 return wait_for(i915_reset_complete(pdev
), 500);
1485 static int g4x_reset_complete(struct pci_dev
*pdev
)
1488 pci_read_config_byte(pdev
, I915_GDRST
, &gdrst
);
1489 return (gdrst
& GRDOM_RESET_ENABLE
) == 0;
1492 static int g33_do_reset(struct drm_i915_private
*dev_priv
, unsigned engine_mask
)
1494 struct pci_dev
*pdev
= dev_priv
->drm
.pdev
;
1495 pci_write_config_byte(pdev
, I915_GDRST
, GRDOM_RESET_ENABLE
);
1496 return wait_for(g4x_reset_complete(pdev
), 500);
1499 static int g4x_do_reset(struct drm_i915_private
*dev_priv
, unsigned engine_mask
)
1501 struct pci_dev
*pdev
= dev_priv
->drm
.pdev
;
1504 pci_write_config_byte(pdev
, I915_GDRST
,
1505 GRDOM_RENDER
| GRDOM_RESET_ENABLE
);
1506 ret
= wait_for(g4x_reset_complete(pdev
), 500);
1510 /* WaVcpClkGateDisableForMediaReset:ctg,elk */
1511 I915_WRITE(VDECCLK_GATE_D
, I915_READ(VDECCLK_GATE_D
) | VCP_UNIT_CLOCK_GATE_DISABLE
);
1512 POSTING_READ(VDECCLK_GATE_D
);
1514 pci_write_config_byte(pdev
, I915_GDRST
,
1515 GRDOM_MEDIA
| GRDOM_RESET_ENABLE
);
1516 ret
= wait_for(g4x_reset_complete(pdev
), 500);
1520 /* WaVcpClkGateDisableForMediaReset:ctg,elk */
1521 I915_WRITE(VDECCLK_GATE_D
, I915_READ(VDECCLK_GATE_D
) & ~VCP_UNIT_CLOCK_GATE_DISABLE
);
1522 POSTING_READ(VDECCLK_GATE_D
);
1524 pci_write_config_byte(pdev
, I915_GDRST
, 0);
1529 static int ironlake_do_reset(struct drm_i915_private
*dev_priv
,
1530 unsigned engine_mask
)
1534 I915_WRITE(ILK_GDSR
,
1535 ILK_GRDOM_RENDER
| ILK_GRDOM_RESET_ENABLE
);
1536 ret
= intel_wait_for_register(dev_priv
,
1537 ILK_GDSR
, ILK_GRDOM_RESET_ENABLE
, 0,
1542 I915_WRITE(ILK_GDSR
,
1543 ILK_GRDOM_MEDIA
| ILK_GRDOM_RESET_ENABLE
);
1544 ret
= intel_wait_for_register(dev_priv
,
1545 ILK_GDSR
, ILK_GRDOM_RESET_ENABLE
, 0,
1550 I915_WRITE(ILK_GDSR
, 0);
1555 /* Reset the hardware domains (GENX_GRDOM_*) specified by mask */
1556 static int gen6_hw_domain_reset(struct drm_i915_private
*dev_priv
,
1559 /* GEN6_GDRST is not in the gt power well, no need to check
1560 * for fifo space for the write or forcewake the chip for
1563 __raw_i915_write32(dev_priv
, GEN6_GDRST
, hw_domain_mask
);
1565 /* Spin waiting for the device to ack the reset requests */
1566 return intel_wait_for_register_fw(dev_priv
,
1567 GEN6_GDRST
, hw_domain_mask
, 0,
1572 * gen6_reset_engines - reset individual engines
1573 * @dev_priv: i915 device
1574 * @engine_mask: mask of intel_ring_flag() engines or ALL_ENGINES for full reset
1576 * This function will reset the individual engines that are set in engine_mask.
1577 * If you provide ALL_ENGINES as mask, full global domain reset will be issued.
1579 * Note: It is responsibility of the caller to handle the difference between
1580 * asking full domain reset versus reset for all available individual engines.
1582 * Returns 0 on success, nonzero on error.
1584 static int gen6_reset_engines(struct drm_i915_private
*dev_priv
,
1585 unsigned engine_mask
)
1587 struct intel_engine_cs
*engine
;
1588 const u32 hw_engine_mask
[I915_NUM_ENGINES
] = {
1589 [RCS
] = GEN6_GRDOM_RENDER
,
1590 [BCS
] = GEN6_GRDOM_BLT
,
1591 [VCS
] = GEN6_GRDOM_MEDIA
,
1592 [VCS2
] = GEN8_GRDOM_MEDIA2
,
1593 [VECS
] = GEN6_GRDOM_VECS
,
1598 if (engine_mask
== ALL_ENGINES
) {
1599 hw_mask
= GEN6_GRDOM_FULL
;
1604 for_each_engine_masked(engine
, dev_priv
, engine_mask
, tmp
)
1605 hw_mask
|= hw_engine_mask
[engine
->id
];
1608 ret
= gen6_hw_domain_reset(dev_priv
, hw_mask
);
1610 intel_uncore_forcewake_reset(dev_priv
, true);
1616 * intel_wait_for_register_fw - wait until register matches expected state
1617 * @dev_priv: the i915 device
1618 * @reg: the register to read
1619 * @mask: mask to apply to register value
1620 * @value: expected value
1621 * @timeout_ms: timeout in millisecond
1623 * This routine waits until the target register @reg contains the expected
1624 * @value after applying the @mask, i.e. it waits until ::
1626 * (I915_READ_FW(reg) & mask) == value
1628 * Otherwise, the wait will timeout after @timeout_ms milliseconds.
1630 * Note that this routine assumes the caller holds forcewake asserted, it is
1631 * not suitable for very long waits. See intel_wait_for_register() if you
1632 * wish to wait without holding forcewake for the duration (i.e. you expect
1633 * the wait to be slow).
1635 * Returns 0 if the register matches the desired condition, or -ETIMEOUT.
1637 int intel_wait_for_register_fw(struct drm_i915_private
*dev_priv
,
1641 const unsigned long timeout_ms
)
1643 #define done ((I915_READ_FW(reg) & mask) == value)
1644 int ret
= wait_for_us(done
, 2);
1646 ret
= wait_for(done
, timeout_ms
);
1652 * intel_wait_for_register - wait until register matches expected state
1653 * @dev_priv: the i915 device
1654 * @reg: the register to read
1655 * @mask: mask to apply to register value
1656 * @value: expected value
1657 * @timeout_ms: timeout in millisecond
1659 * This routine waits until the target register @reg contains the expected
1660 * @value after applying the @mask, i.e. it waits until ::
1662 * (I915_READ(reg) & mask) == value
1664 * Otherwise, the wait will timeout after @timeout_ms milliseconds.
1666 * Returns 0 if the register matches the desired condition, or -ETIMEOUT.
1668 int intel_wait_for_register(struct drm_i915_private
*dev_priv
,
1672 const unsigned long timeout_ms
)
1676 intel_uncore_forcewake_for_reg(dev_priv
, reg
, FW_REG_READ
);
1679 intel_uncore_forcewake_get(dev_priv
, fw
);
1680 ret
= wait_for_us((I915_READ_FW(reg
) & mask
) == value
, 2);
1681 intel_uncore_forcewake_put(dev_priv
, fw
);
1683 ret
= wait_for((I915_READ_NOTRACE(reg
) & mask
) == value
,
1689 static int gen8_request_engine_reset(struct intel_engine_cs
*engine
)
1691 struct drm_i915_private
*dev_priv
= engine
->i915
;
1694 I915_WRITE_FW(RING_RESET_CTL(engine
->mmio_base
),
1695 _MASKED_BIT_ENABLE(RESET_CTL_REQUEST_RESET
));
1697 ret
= intel_wait_for_register_fw(dev_priv
,
1698 RING_RESET_CTL(engine
->mmio_base
),
1699 RESET_CTL_READY_TO_RESET
,
1700 RESET_CTL_READY_TO_RESET
,
1703 DRM_ERROR("%s: reset request timeout\n", engine
->name
);
1708 static void gen8_unrequest_engine_reset(struct intel_engine_cs
*engine
)
1710 struct drm_i915_private
*dev_priv
= engine
->i915
;
1712 I915_WRITE_FW(RING_RESET_CTL(engine
->mmio_base
),
1713 _MASKED_BIT_DISABLE(RESET_CTL_REQUEST_RESET
));
1716 static int gen8_reset_engines(struct drm_i915_private
*dev_priv
,
1717 unsigned engine_mask
)
1719 struct intel_engine_cs
*engine
;
1722 for_each_engine_masked(engine
, dev_priv
, engine_mask
, tmp
)
1723 if (gen8_request_engine_reset(engine
))
1726 return gen6_reset_engines(dev_priv
, engine_mask
);
1729 for_each_engine_masked(engine
, dev_priv
, engine_mask
, tmp
)
1730 gen8_unrequest_engine_reset(engine
);
1735 typedef int (*reset_func
)(struct drm_i915_private
*, unsigned engine_mask
);
1737 static reset_func
intel_get_gpu_reset(struct drm_i915_private
*dev_priv
)
1742 if (INTEL_INFO(dev_priv
)->gen
>= 8)
1743 return gen8_reset_engines
;
1744 else if (INTEL_INFO(dev_priv
)->gen
>= 6)
1745 return gen6_reset_engines
;
1746 else if (IS_GEN5(dev_priv
))
1747 return ironlake_do_reset
;
1748 else if (IS_G4X(dev_priv
))
1749 return g4x_do_reset
;
1750 else if (IS_G33(dev_priv
) || IS_PINEVIEW(dev_priv
))
1751 return g33_do_reset
;
1752 else if (INTEL_INFO(dev_priv
)->gen
>= 3)
1753 return i915_do_reset
;
1758 int intel_gpu_reset(struct drm_i915_private
*dev_priv
, unsigned engine_mask
)
1763 reset
= intel_get_gpu_reset(dev_priv
);
1767 /* If the power well sleeps during the reset, the reset
1768 * request may be dropped and never completes (causing -EIO).
1770 intel_uncore_forcewake_get(dev_priv
, FORCEWAKE_ALL
);
1771 ret
= reset(dev_priv
, engine_mask
);
1772 intel_uncore_forcewake_put(dev_priv
, FORCEWAKE_ALL
);
1777 bool intel_has_gpu_reset(struct drm_i915_private
*dev_priv
)
1779 return intel_get_gpu_reset(dev_priv
) != NULL
;
1782 int intel_guc_reset(struct drm_i915_private
*dev_priv
)
1785 unsigned long irqflags
;
1787 if (!HAS_GUC(dev_priv
))
1790 intel_uncore_forcewake_get(dev_priv
, FORCEWAKE_ALL
);
1791 spin_lock_irqsave(&dev_priv
->uncore
.lock
, irqflags
);
1793 ret
= gen6_hw_domain_reset(dev_priv
, GEN9_GRDOM_GUC
);
1795 spin_unlock_irqrestore(&dev_priv
->uncore
.lock
, irqflags
);
1796 intel_uncore_forcewake_put(dev_priv
, FORCEWAKE_ALL
);
1801 bool intel_uncore_unclaimed_mmio(struct drm_i915_private
*dev_priv
)
1803 return check_for_unclaimed_mmio(dev_priv
);
1807 intel_uncore_arm_unclaimed_mmio_detection(struct drm_i915_private
*dev_priv
)
1809 if (unlikely(i915
.mmio_debug
||
1810 dev_priv
->uncore
.unclaimed_mmio_check
<= 0))
1813 if (unlikely(intel_uncore_unclaimed_mmio(dev_priv
))) {
1814 DRM_DEBUG("Unclaimed register detected, "
1815 "enabling oneshot unclaimed register reporting. "
1816 "Please use i915.mmio_debug=N for more information.\n");
1818 dev_priv
->uncore
.unclaimed_mmio_check
--;
1825 static enum forcewake_domains
1826 intel_uncore_forcewake_for_read(struct drm_i915_private
*dev_priv
,
1829 u32 offset
= i915_mmio_reg_offset(reg
);
1830 enum forcewake_domains fw_domains
;
1832 if (HAS_FWTABLE(dev_priv
)) {
1833 fw_domains
= __fwtable_reg_read_fw_domains(offset
);
1834 } else if (INTEL_GEN(dev_priv
) >= 6) {
1835 fw_domains
= __gen6_reg_read_fw_domains(offset
);
1837 WARN_ON(!IS_GEN(dev_priv
, 2, 5));
1841 WARN_ON(fw_domains
& ~dev_priv
->uncore
.fw_domains
);
1846 static enum forcewake_domains
1847 intel_uncore_forcewake_for_write(struct drm_i915_private
*dev_priv
,
1850 u32 offset
= i915_mmio_reg_offset(reg
);
1851 enum forcewake_domains fw_domains
;
1853 if (HAS_FWTABLE(dev_priv
) && !IS_VALLEYVIEW(dev_priv
)) {
1854 fw_domains
= __fwtable_reg_write_fw_domains(offset
);
1855 } else if (IS_GEN8(dev_priv
)) {
1856 fw_domains
= __gen8_reg_write_fw_domains(offset
);
1857 } else if (IS_GEN(dev_priv
, 6, 7)) {
1858 fw_domains
= FORCEWAKE_RENDER
;
1860 WARN_ON(!IS_GEN(dev_priv
, 2, 5));
1864 WARN_ON(fw_domains
& ~dev_priv
->uncore
.fw_domains
);
1870 * intel_uncore_forcewake_for_reg - which forcewake domains are needed to access
1872 * @dev_priv: pointer to struct drm_i915_private
1873 * @reg: register in question
1874 * @op: operation bitmask of FW_REG_READ and/or FW_REG_WRITE
1876 * Returns a set of forcewake domains required to be taken with for example
1877 * intel_uncore_forcewake_get for the specified register to be accessible in the
1878 * specified mode (read, write or read/write) with raw mmio accessors.
1880 * NOTE: On Gen6 and Gen7 write forcewake domain (FORCEWAKE_RENDER) requires the
1881 * callers to do FIFO management on their own or risk losing writes.
1883 enum forcewake_domains
1884 intel_uncore_forcewake_for_reg(struct drm_i915_private
*dev_priv
,
1885 i915_reg_t reg
, unsigned int op
)
1887 enum forcewake_domains fw_domains
= 0;
1891 if (intel_vgpu_active(dev_priv
))
1894 if (op
& FW_REG_READ
)
1895 fw_domains
= intel_uncore_forcewake_for_read(dev_priv
, reg
);
1897 if (op
& FW_REG_WRITE
)
1898 fw_domains
|= intel_uncore_forcewake_for_write(dev_priv
, reg
);
1903 #if IS_ENABLED(CONFIG_DRM_I915_SELFTEST)
1904 #include "selftests/intel_uncore.c"