2 * Copyright © 2013 Intel Corporation
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
25 #include "intel_drv.h"
27 #define FORCEWAKE_ACK_TIMEOUT_MS 2
29 #define __raw_i915_read8(dev_priv__, reg__) readb((dev_priv__)->regs + (reg__))
30 #define __raw_i915_write8(dev_priv__, reg__, val__) writeb(val__, (dev_priv__)->regs + (reg__))
32 #define __raw_i915_read16(dev_priv__, reg__) readw((dev_priv__)->regs + (reg__))
33 #define __raw_i915_write16(dev_priv__, reg__, val__) writew(val__, (dev_priv__)->regs + (reg__))
35 #define __raw_i915_read32(dev_priv__, reg__) readl((dev_priv__)->regs + (reg__))
36 #define __raw_i915_write32(dev_priv__, reg__, val__) writel(val__, (dev_priv__)->regs + (reg__))
38 #define __raw_i915_read64(dev_priv__, reg__) readq((dev_priv__)->regs + (reg__))
39 #define __raw_i915_write64(dev_priv__, reg__, val__) writeq(val__, (dev_priv__)->regs + (reg__))
41 #define __raw_posting_read(dev_priv__, reg__) (void)__raw_i915_read32(dev_priv__, reg__)
44 static void __gen6_gt_wait_for_thread_c0(struct drm_i915_private
*dev_priv
)
46 u32 gt_thread_status_mask
;
48 if (IS_HASWELL(dev_priv
->dev
))
49 gt_thread_status_mask
= GEN6_GT_THREAD_STATUS_CORE_MASK_HSW
;
51 gt_thread_status_mask
= GEN6_GT_THREAD_STATUS_CORE_MASK
;
53 /* w/a for a sporadic read returning 0 by waiting for the GT
56 if (wait_for_atomic_us((__raw_i915_read32(dev_priv
, GEN6_GT_THREAD_STATUS_REG
) & gt_thread_status_mask
) == 0, 500))
57 DRM_ERROR("GT thread status wait timed out\n");
60 static void __gen6_gt_force_wake_reset(struct drm_i915_private
*dev_priv
)
62 __raw_i915_write32(dev_priv
, FORCEWAKE
, 0);
63 /* something from same cacheline, but !FORCEWAKE */
64 __raw_posting_read(dev_priv
, ECOBUS
);
67 static void __gen6_gt_force_wake_get(struct drm_i915_private
*dev_priv
)
69 if (wait_for_atomic((__raw_i915_read32(dev_priv
, FORCEWAKE_ACK
) & 1) == 0,
70 FORCEWAKE_ACK_TIMEOUT_MS
))
71 DRM_ERROR("Timed out waiting for forcewake old ack to clear.\n");
73 __raw_i915_write32(dev_priv
, FORCEWAKE
, 1);
74 /* something from same cacheline, but !FORCEWAKE */
75 __raw_posting_read(dev_priv
, ECOBUS
);
77 if (wait_for_atomic((__raw_i915_read32(dev_priv
, FORCEWAKE_ACK
) & 1),
78 FORCEWAKE_ACK_TIMEOUT_MS
))
79 DRM_ERROR("Timed out waiting for forcewake to ack request.\n");
81 /* WaRsForcewakeWaitTC0:snb */
82 __gen6_gt_wait_for_thread_c0(dev_priv
);
85 static void __gen6_gt_force_wake_mt_reset(struct drm_i915_private
*dev_priv
)
87 __raw_i915_write32(dev_priv
, FORCEWAKE_MT
, _MASKED_BIT_DISABLE(0xffff));
88 /* something from same cacheline, but !FORCEWAKE_MT */
89 __raw_posting_read(dev_priv
, ECOBUS
);
92 static void __gen6_gt_force_wake_mt_get(struct drm_i915_private
*dev_priv
)
96 if (IS_HASWELL(dev_priv
->dev
) || IS_GEN8(dev_priv
->dev
))
97 forcewake_ack
= FORCEWAKE_ACK_HSW
;
99 forcewake_ack
= FORCEWAKE_MT_ACK
;
101 if (wait_for_atomic((__raw_i915_read32(dev_priv
, forcewake_ack
) & FORCEWAKE_KERNEL
) == 0,
102 FORCEWAKE_ACK_TIMEOUT_MS
))
103 DRM_ERROR("Timed out waiting for forcewake old ack to clear.\n");
105 __raw_i915_write32(dev_priv
, FORCEWAKE_MT
,
106 _MASKED_BIT_ENABLE(FORCEWAKE_KERNEL
));
107 /* something from same cacheline, but !FORCEWAKE_MT */
108 __raw_posting_read(dev_priv
, ECOBUS
);
110 if (wait_for_atomic((__raw_i915_read32(dev_priv
, forcewake_ack
) & FORCEWAKE_KERNEL
),
111 FORCEWAKE_ACK_TIMEOUT_MS
))
112 DRM_ERROR("Timed out waiting for forcewake to ack request.\n");
114 /* WaRsForcewakeWaitTC0:ivb,hsw */
115 if (INTEL_INFO(dev_priv
->dev
)->gen
< 8)
116 __gen6_gt_wait_for_thread_c0(dev_priv
);
119 static void gen6_gt_check_fifodbg(struct drm_i915_private
*dev_priv
)
123 gtfifodbg
= __raw_i915_read32(dev_priv
, GTFIFODBG
);
124 if (WARN(gtfifodbg
& GT_FIFO_CPU_ERROR_MASK
,
125 "MMIO read or write has been dropped %x\n", gtfifodbg
))
126 __raw_i915_write32(dev_priv
, GTFIFODBG
, GT_FIFO_CPU_ERROR_MASK
);
129 static void __gen6_gt_force_wake_put(struct drm_i915_private
*dev_priv
)
131 __raw_i915_write32(dev_priv
, FORCEWAKE
, 0);
132 /* something from same cacheline, but !FORCEWAKE */
133 __raw_posting_read(dev_priv
, ECOBUS
);
134 gen6_gt_check_fifodbg(dev_priv
);
137 static void __gen6_gt_force_wake_mt_put(struct drm_i915_private
*dev_priv
)
139 __raw_i915_write32(dev_priv
, FORCEWAKE_MT
,
140 _MASKED_BIT_DISABLE(FORCEWAKE_KERNEL
));
141 /* something from same cacheline, but !FORCEWAKE_MT */
142 __raw_posting_read(dev_priv
, ECOBUS
);
143 gen6_gt_check_fifodbg(dev_priv
);
146 static int __gen6_gt_wait_for_fifo(struct drm_i915_private
*dev_priv
)
150 if (dev_priv
->uncore
.fifo_count
< GT_FIFO_NUM_RESERVED_ENTRIES
) {
152 u32 fifo
= __raw_i915_read32(dev_priv
, GT_FIFO_FREE_ENTRIES
);
153 while (fifo
<= GT_FIFO_NUM_RESERVED_ENTRIES
&& loop
--) {
155 fifo
= __raw_i915_read32(dev_priv
, GT_FIFO_FREE_ENTRIES
);
157 if (WARN_ON(loop
< 0 && fifo
<= GT_FIFO_NUM_RESERVED_ENTRIES
))
159 dev_priv
->uncore
.fifo_count
= fifo
;
161 dev_priv
->uncore
.fifo_count
--;
166 static void vlv_force_wake_reset(struct drm_i915_private
*dev_priv
)
168 __raw_i915_write32(dev_priv
, FORCEWAKE_VLV
,
169 _MASKED_BIT_DISABLE(0xffff));
170 /* something from same cacheline, but !FORCEWAKE_VLV */
171 __raw_posting_read(dev_priv
, FORCEWAKE_ACK_VLV
);
174 static void vlv_force_wake_get(struct drm_i915_private
*dev_priv
)
176 if (wait_for_atomic((__raw_i915_read32(dev_priv
, FORCEWAKE_ACK_VLV
) & FORCEWAKE_KERNEL
) == 0,
177 FORCEWAKE_ACK_TIMEOUT_MS
))
178 DRM_ERROR("Timed out waiting for forcewake old ack to clear.\n");
180 __raw_i915_write32(dev_priv
, FORCEWAKE_VLV
,
181 _MASKED_BIT_ENABLE(FORCEWAKE_KERNEL
));
182 __raw_i915_write32(dev_priv
, FORCEWAKE_MEDIA_VLV
,
183 _MASKED_BIT_ENABLE(FORCEWAKE_KERNEL
));
185 if (wait_for_atomic((__raw_i915_read32(dev_priv
, FORCEWAKE_ACK_VLV
) & FORCEWAKE_KERNEL
),
186 FORCEWAKE_ACK_TIMEOUT_MS
))
187 DRM_ERROR("Timed out waiting for GT to ack forcewake request.\n");
189 if (wait_for_atomic((__raw_i915_read32(dev_priv
, FORCEWAKE_ACK_MEDIA_VLV
) &
191 FORCEWAKE_ACK_TIMEOUT_MS
))
192 DRM_ERROR("Timed out waiting for media to ack forcewake request.\n");
194 /* WaRsForcewakeWaitTC0:vlv */
195 __gen6_gt_wait_for_thread_c0(dev_priv
);
198 static void vlv_force_wake_put(struct drm_i915_private
*dev_priv
)
200 __raw_i915_write32(dev_priv
, FORCEWAKE_VLV
,
201 _MASKED_BIT_DISABLE(FORCEWAKE_KERNEL
));
202 __raw_i915_write32(dev_priv
, FORCEWAKE_MEDIA_VLV
,
203 _MASKED_BIT_DISABLE(FORCEWAKE_KERNEL
));
204 /* The below doubles as a POSTING_READ */
205 gen6_gt_check_fifodbg(dev_priv
);
208 static void gen6_force_wake_work(struct work_struct
*work
)
210 struct drm_i915_private
*dev_priv
=
211 container_of(work
, typeof(*dev_priv
), uncore
.force_wake_work
.work
);
212 unsigned long irqflags
;
214 spin_lock_irqsave(&dev_priv
->uncore
.lock
, irqflags
);
215 if (--dev_priv
->uncore
.forcewake_count
== 0)
216 dev_priv
->uncore
.funcs
.force_wake_put(dev_priv
);
217 spin_unlock_irqrestore(&dev_priv
->uncore
.lock
, irqflags
);
220 static void intel_uncore_forcewake_reset(struct drm_device
*dev
)
222 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
224 if (IS_VALLEYVIEW(dev
)) {
225 vlv_force_wake_reset(dev_priv
);
226 } else if (INTEL_INFO(dev
)->gen
>= 6) {
227 __gen6_gt_force_wake_reset(dev_priv
);
228 if (IS_IVYBRIDGE(dev
) || IS_HASWELL(dev
))
229 __gen6_gt_force_wake_mt_reset(dev_priv
);
233 void intel_uncore_early_sanitize(struct drm_device
*dev
)
235 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
237 if (HAS_FPGA_DBG_UNCLAIMED(dev
))
238 __raw_i915_write32(dev_priv
, FPGA_DBG
, FPGA_DBG_RM_NOCLAIM
);
240 if (IS_HASWELL(dev
) &&
241 (__raw_i915_read32(dev_priv
, HSW_EDRAM_PRESENT
) == 1)) {
242 /* The docs do not explain exactly how the calculation can be
243 * made. It is somewhat guessable, but for now, it's always
245 * NB: We can't write IDICR yet because we do not have gt funcs
247 dev_priv
->ellc_size
= 128;
248 DRM_INFO("Found %zuMB of eLLC\n", dev_priv
->ellc_size
);
251 intel_uncore_forcewake_reset(dev
);
254 void intel_uncore_sanitize(struct drm_device
*dev
)
256 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
259 intel_uncore_forcewake_reset(dev
);
261 /* BIOS often leaves RC6 enabled, but disable it for hw init */
262 intel_disable_gt_powersave(dev
);
264 /* Turn off power gate, require especially for the BIOS less system */
265 if (IS_VALLEYVIEW(dev
)) {
267 mutex_lock(&dev_priv
->rps
.hw_lock
);
268 reg_val
= vlv_punit_read(dev_priv
, PUNIT_REG_PWRGT_STATUS
);
270 if (reg_val
& (RENDER_PWRGT
| MEDIA_PWRGT
| DISP2D_PWRGT
))
271 vlv_punit_write(dev_priv
, PUNIT_REG_PWRGT_CTRL
, 0x0);
273 mutex_unlock(&dev_priv
->rps
.hw_lock
);
279 * Generally this is called implicitly by the register read function. However,
280 * if some sequence requires the GT to not power down then this function should
281 * be called at the beginning of the sequence followed by a call to
282 * gen6_gt_force_wake_put() at the end of the sequence.
284 void gen6_gt_force_wake_get(struct drm_i915_private
*dev_priv
)
286 unsigned long irqflags
;
288 if (!dev_priv
->uncore
.funcs
.force_wake_get
)
291 spin_lock_irqsave(&dev_priv
->uncore
.lock
, irqflags
);
292 if (dev_priv
->uncore
.forcewake_count
++ == 0)
293 dev_priv
->uncore
.funcs
.force_wake_get(dev_priv
);
294 spin_unlock_irqrestore(&dev_priv
->uncore
.lock
, irqflags
);
298 * see gen6_gt_force_wake_get()
300 void gen6_gt_force_wake_put(struct drm_i915_private
*dev_priv
)
302 unsigned long irqflags
;
304 if (!dev_priv
->uncore
.funcs
.force_wake_put
)
307 spin_lock_irqsave(&dev_priv
->uncore
.lock
, irqflags
);
308 if (--dev_priv
->uncore
.forcewake_count
== 0) {
309 dev_priv
->uncore
.forcewake_count
++;
310 mod_delayed_work(dev_priv
->wq
,
311 &dev_priv
->uncore
.force_wake_work
,
314 spin_unlock_irqrestore(&dev_priv
->uncore
.lock
, irqflags
);
317 /* We give fast paths for the really cool registers */
318 #define NEEDS_FORCE_WAKE(dev_priv, reg) \
319 ((reg) < 0x40000 && (reg) != FORCEWAKE)
322 ilk_dummy_write(struct drm_i915_private
*dev_priv
)
324 /* WaIssueDummyWriteToWakeupFromRC6:ilk Issue a dummy write to wake up
325 * the chip from rc6 before touching it for real. MI_MODE is masked,
326 * hence harmless to write 0 into. */
327 __raw_i915_write32(dev_priv
, MI_MODE
, 0);
331 hsw_unclaimed_reg_clear(struct drm_i915_private
*dev_priv
, u32 reg
)
333 if (__raw_i915_read32(dev_priv
, FPGA_DBG
) & FPGA_DBG_RM_NOCLAIM
) {
334 DRM_ERROR("Unknown unclaimed register before writing to %x\n",
336 __raw_i915_write32(dev_priv
, FPGA_DBG
, FPGA_DBG_RM_NOCLAIM
);
341 hsw_unclaimed_reg_check(struct drm_i915_private
*dev_priv
, u32 reg
)
343 if (__raw_i915_read32(dev_priv
, FPGA_DBG
) & FPGA_DBG_RM_NOCLAIM
) {
344 DRM_ERROR("Unclaimed write to %x\n", reg
);
345 __raw_i915_write32(dev_priv
, FPGA_DBG
, FPGA_DBG_RM_NOCLAIM
);
349 #define REG_READ_HEADER(x) \
350 unsigned long irqflags; \
352 spin_lock_irqsave(&dev_priv->uncore.lock, irqflags)
354 #define REG_READ_FOOTER \
355 spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags); \
356 trace_i915_reg_rw(false, reg, val, sizeof(val), trace); \
359 #define __gen4_read(x) \
361 gen4_read##x(struct drm_i915_private *dev_priv, off_t reg, bool trace) { \
362 REG_READ_HEADER(x); \
363 val = __raw_i915_read##x(dev_priv, reg); \
367 #define __gen5_read(x) \
369 gen5_read##x(struct drm_i915_private *dev_priv, off_t reg, bool trace) { \
370 REG_READ_HEADER(x); \
371 ilk_dummy_write(dev_priv); \
372 val = __raw_i915_read##x(dev_priv, reg); \
376 #define __gen6_read(x) \
378 gen6_read##x(struct drm_i915_private *dev_priv, off_t reg, bool trace) { \
379 REG_READ_HEADER(x); \
380 if (NEEDS_FORCE_WAKE((dev_priv), (reg))) { \
381 if (dev_priv->uncore.forcewake_count == 0) \
382 dev_priv->uncore.funcs.force_wake_get(dev_priv); \
383 val = __raw_i915_read##x(dev_priv, reg); \
384 if (dev_priv->uncore.forcewake_count == 0) \
385 dev_priv->uncore.funcs.force_wake_put(dev_priv); \
387 val = __raw_i915_read##x(dev_priv, reg); \
408 #undef REG_READ_FOOTER
409 #undef REG_READ_HEADER
411 #define REG_WRITE_HEADER \
412 unsigned long irqflags; \
413 trace_i915_reg_rw(true, reg, val, sizeof(val), trace); \
414 spin_lock_irqsave(&dev_priv->uncore.lock, irqflags)
416 #define __gen4_write(x) \
418 gen4_write##x(struct drm_i915_private *dev_priv, off_t reg, u##x val, bool trace) { \
420 __raw_i915_write##x(dev_priv, reg, val); \
421 spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags); \
424 #define __gen5_write(x) \
426 gen5_write##x(struct drm_i915_private *dev_priv, off_t reg, u##x val, bool trace) { \
428 ilk_dummy_write(dev_priv); \
429 __raw_i915_write##x(dev_priv, reg, val); \
430 spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags); \
433 #define __gen6_write(x) \
435 gen6_write##x(struct drm_i915_private *dev_priv, off_t reg, u##x val, bool trace) { \
436 u32 __fifo_ret = 0; \
438 if (NEEDS_FORCE_WAKE((dev_priv), (reg))) { \
439 __fifo_ret = __gen6_gt_wait_for_fifo(dev_priv); \
441 __raw_i915_write##x(dev_priv, reg, val); \
442 if (unlikely(__fifo_ret)) { \
443 gen6_gt_check_fifodbg(dev_priv); \
445 spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags); \
448 #define __hsw_write(x) \
450 hsw_write##x(struct drm_i915_private *dev_priv, off_t reg, u##x val, bool trace) { \
451 u32 __fifo_ret = 0; \
453 if (NEEDS_FORCE_WAKE((dev_priv), (reg))) { \
454 __fifo_ret = __gen6_gt_wait_for_fifo(dev_priv); \
456 hsw_unclaimed_reg_clear(dev_priv, reg); \
457 __raw_i915_write##x(dev_priv, reg, val); \
458 if (unlikely(__fifo_ret)) { \
459 gen6_gt_check_fifodbg(dev_priv); \
461 hsw_unclaimed_reg_check(dev_priv, reg); \
462 spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags); \
465 static const u32 gen8_shadowed_regs
[] = {
469 RING_TAIL(RENDER_RING_BASE
),
470 RING_TAIL(GEN6_BSD_RING_BASE
),
471 RING_TAIL(VEBOX_RING_BASE
),
472 RING_TAIL(BLT_RING_BASE
),
473 /* TODO: Other registers are not yet used */
476 static bool is_gen8_shadowed(struct drm_i915_private
*dev_priv
, u32 reg
)
479 for (i
= 0; i
< ARRAY_SIZE(gen8_shadowed_regs
); i
++)
480 if (reg
== gen8_shadowed_regs
[i
])
486 #define __gen8_write(x) \
488 gen8_write##x(struct drm_i915_private *dev_priv, off_t reg, u##x val, bool trace) { \
489 bool __needs_put = !is_gen8_shadowed(dev_priv, reg); \
492 dev_priv->uncore.funcs.force_wake_get(dev_priv); \
494 __raw_i915_write##x(dev_priv, reg, val); \
496 dev_priv->uncore.funcs.force_wake_put(dev_priv); \
498 spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags); \
527 #undef REG_WRITE_HEADER
529 void intel_uncore_init(struct drm_device
*dev
)
531 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
533 INIT_DELAYED_WORK(&dev_priv
->uncore
.force_wake_work
,
534 gen6_force_wake_work
);
536 if (IS_VALLEYVIEW(dev
)) {
537 dev_priv
->uncore
.funcs
.force_wake_get
= vlv_force_wake_get
;
538 dev_priv
->uncore
.funcs
.force_wake_put
= vlv_force_wake_put
;
539 } else if (IS_HASWELL(dev
) || IS_GEN8(dev
)) {
540 dev_priv
->uncore
.funcs
.force_wake_get
= __gen6_gt_force_wake_mt_get
;
541 dev_priv
->uncore
.funcs
.force_wake_put
= __gen6_gt_force_wake_mt_put
;
542 } else if (IS_IVYBRIDGE(dev
)) {
545 /* IVB configs may use multi-threaded forcewake */
547 /* A small trick here - if the bios hasn't configured
548 * MT forcewake, and if the device is in RC6, then
549 * force_wake_mt_get will not wake the device and the
550 * ECOBUS read will return zero. Which will be
551 * (correctly) interpreted by the test below as MT
552 * forcewake being disabled.
554 mutex_lock(&dev
->struct_mutex
);
555 __gen6_gt_force_wake_mt_get(dev_priv
);
556 ecobus
= __raw_i915_read32(dev_priv
, ECOBUS
);
557 __gen6_gt_force_wake_mt_put(dev_priv
);
558 mutex_unlock(&dev
->struct_mutex
);
560 if (ecobus
& FORCEWAKE_MT_ENABLE
) {
561 dev_priv
->uncore
.funcs
.force_wake_get
=
562 __gen6_gt_force_wake_mt_get
;
563 dev_priv
->uncore
.funcs
.force_wake_put
=
564 __gen6_gt_force_wake_mt_put
;
566 DRM_INFO("No MT forcewake available on Ivybridge, this can result in issues\n");
567 DRM_INFO("when using vblank-synced partial screen updates.\n");
568 dev_priv
->uncore
.funcs
.force_wake_get
=
569 __gen6_gt_force_wake_get
;
570 dev_priv
->uncore
.funcs
.force_wake_put
=
571 __gen6_gt_force_wake_put
;
573 } else if (IS_GEN6(dev
)) {
574 dev_priv
->uncore
.funcs
.force_wake_get
=
575 __gen6_gt_force_wake_get
;
576 dev_priv
->uncore
.funcs
.force_wake_put
=
577 __gen6_gt_force_wake_put
;
580 switch (INTEL_INFO(dev
)->gen
) {
582 dev_priv
->uncore
.funcs
.mmio_writeb
= gen8_write8
;
583 dev_priv
->uncore
.funcs
.mmio_writew
= gen8_write16
;
584 dev_priv
->uncore
.funcs
.mmio_writel
= gen8_write32
;
585 dev_priv
->uncore
.funcs
.mmio_writeq
= gen8_write64
;
586 dev_priv
->uncore
.funcs
.mmio_readb
= gen6_read8
;
587 dev_priv
->uncore
.funcs
.mmio_readw
= gen6_read16
;
588 dev_priv
->uncore
.funcs
.mmio_readl
= gen6_read32
;
589 dev_priv
->uncore
.funcs
.mmio_readq
= gen6_read64
;
593 if (IS_HASWELL(dev
)) {
594 dev_priv
->uncore
.funcs
.mmio_writeb
= hsw_write8
;
595 dev_priv
->uncore
.funcs
.mmio_writew
= hsw_write16
;
596 dev_priv
->uncore
.funcs
.mmio_writel
= hsw_write32
;
597 dev_priv
->uncore
.funcs
.mmio_writeq
= hsw_write64
;
599 dev_priv
->uncore
.funcs
.mmio_writeb
= gen6_write8
;
600 dev_priv
->uncore
.funcs
.mmio_writew
= gen6_write16
;
601 dev_priv
->uncore
.funcs
.mmio_writel
= gen6_write32
;
602 dev_priv
->uncore
.funcs
.mmio_writeq
= gen6_write64
;
604 dev_priv
->uncore
.funcs
.mmio_readb
= gen6_read8
;
605 dev_priv
->uncore
.funcs
.mmio_readw
= gen6_read16
;
606 dev_priv
->uncore
.funcs
.mmio_readl
= gen6_read32
;
607 dev_priv
->uncore
.funcs
.mmio_readq
= gen6_read64
;
610 dev_priv
->uncore
.funcs
.mmio_writeb
= gen5_write8
;
611 dev_priv
->uncore
.funcs
.mmio_writew
= gen5_write16
;
612 dev_priv
->uncore
.funcs
.mmio_writel
= gen5_write32
;
613 dev_priv
->uncore
.funcs
.mmio_writeq
= gen5_write64
;
614 dev_priv
->uncore
.funcs
.mmio_readb
= gen5_read8
;
615 dev_priv
->uncore
.funcs
.mmio_readw
= gen5_read16
;
616 dev_priv
->uncore
.funcs
.mmio_readl
= gen5_read32
;
617 dev_priv
->uncore
.funcs
.mmio_readq
= gen5_read64
;
622 dev_priv
->uncore
.funcs
.mmio_writeb
= gen4_write8
;
623 dev_priv
->uncore
.funcs
.mmio_writew
= gen4_write16
;
624 dev_priv
->uncore
.funcs
.mmio_writel
= gen4_write32
;
625 dev_priv
->uncore
.funcs
.mmio_writeq
= gen4_write64
;
626 dev_priv
->uncore
.funcs
.mmio_readb
= gen4_read8
;
627 dev_priv
->uncore
.funcs
.mmio_readw
= gen4_read16
;
628 dev_priv
->uncore
.funcs
.mmio_readl
= gen4_read32
;
629 dev_priv
->uncore
.funcs
.mmio_readq
= gen4_read64
;
634 void intel_uncore_fini(struct drm_device
*dev
)
636 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
638 flush_delayed_work(&dev_priv
->uncore
.force_wake_work
);
640 /* Paranoia: make sure we have disabled everything before we exit. */
641 intel_uncore_sanitize(dev
);
644 static const struct register_whitelist
{
647 uint32_t gen_bitmask
; /* support gens, 0x10 for 4, 0x30 for 4 and 5, etc. */
649 { RING_TIMESTAMP(RENDER_RING_BASE
), 8, 0xF0 },
652 int i915_reg_read_ioctl(struct drm_device
*dev
,
653 void *data
, struct drm_file
*file
)
655 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
656 struct drm_i915_reg_read
*reg
= data
;
657 struct register_whitelist
const *entry
= whitelist
;
660 for (i
= 0; i
< ARRAY_SIZE(whitelist
); i
++, entry
++) {
661 if (entry
->offset
== reg
->offset
&&
662 (1 << INTEL_INFO(dev
)->gen
& entry
->gen_bitmask
))
666 if (i
== ARRAY_SIZE(whitelist
))
669 switch (entry
->size
) {
671 reg
->val
= I915_READ64(reg
->offset
);
674 reg
->val
= I915_READ(reg
->offset
);
677 reg
->val
= I915_READ16(reg
->offset
);
680 reg
->val
= I915_READ8(reg
->offset
);
690 static int i965_reset_complete(struct drm_device
*dev
)
693 pci_read_config_byte(dev
->pdev
, I965_GDRST
, &gdrst
);
694 return (gdrst
& GRDOM_RESET_ENABLE
) == 0;
697 static int i965_do_reset(struct drm_device
*dev
)
702 * Set the domains we want to reset (GRDOM/bits 2 and 3) as
703 * well as the reset bit (GR/bit 0). Setting the GR bit
704 * triggers the reset; when done, the hardware will clear it.
706 pci_write_config_byte(dev
->pdev
, I965_GDRST
,
707 GRDOM_RENDER
| GRDOM_RESET_ENABLE
);
708 ret
= wait_for(i965_reset_complete(dev
), 500);
712 /* We can't reset render&media without also resetting display ... */
713 pci_write_config_byte(dev
->pdev
, I965_GDRST
,
714 GRDOM_MEDIA
| GRDOM_RESET_ENABLE
);
716 ret
= wait_for(i965_reset_complete(dev
), 500);
720 pci_write_config_byte(dev
->pdev
, I965_GDRST
, 0);
725 static int ironlake_do_reset(struct drm_device
*dev
)
727 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
731 gdrst
= I915_READ(MCHBAR_MIRROR_BASE
+ ILK_GDSR
);
732 gdrst
&= ~GRDOM_MASK
;
733 I915_WRITE(MCHBAR_MIRROR_BASE
+ ILK_GDSR
,
734 gdrst
| GRDOM_RENDER
| GRDOM_RESET_ENABLE
);
735 ret
= wait_for(I915_READ(MCHBAR_MIRROR_BASE
+ ILK_GDSR
) & 0x1, 500);
739 /* We can't reset render&media without also resetting display ... */
740 gdrst
= I915_READ(MCHBAR_MIRROR_BASE
+ ILK_GDSR
);
741 gdrst
&= ~GRDOM_MASK
;
742 I915_WRITE(MCHBAR_MIRROR_BASE
+ ILK_GDSR
,
743 gdrst
| GRDOM_MEDIA
| GRDOM_RESET_ENABLE
);
744 return wait_for(I915_READ(MCHBAR_MIRROR_BASE
+ ILK_GDSR
) & 0x1, 500);
747 static int gen6_do_reset(struct drm_device
*dev
)
749 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
751 unsigned long irqflags
;
753 /* Hold uncore.lock across reset to prevent any register access
754 * with forcewake not set correctly
756 spin_lock_irqsave(&dev_priv
->uncore
.lock
, irqflags
);
760 /* GEN6_GDRST is not in the gt power well, no need to check
761 * for fifo space for the write or forcewake the chip for
764 __raw_i915_write32(dev_priv
, GEN6_GDRST
, GEN6_GRDOM_FULL
);
766 /* Spin waiting for the device to ack the reset request */
767 ret
= wait_for((__raw_i915_read32(dev_priv
, GEN6_GDRST
) & GEN6_GRDOM_FULL
) == 0, 500);
769 intel_uncore_forcewake_reset(dev
);
771 /* If reset with a user forcewake, try to restore, otherwise turn it off */
772 if (dev_priv
->uncore
.forcewake_count
)
773 dev_priv
->uncore
.funcs
.force_wake_get(dev_priv
);
775 dev_priv
->uncore
.funcs
.force_wake_put(dev_priv
);
777 /* Restore fifo count */
778 dev_priv
->uncore
.fifo_count
= __raw_i915_read32(dev_priv
, GT_FIFO_FREE_ENTRIES
);
780 spin_unlock_irqrestore(&dev_priv
->uncore
.lock
, irqflags
);
784 int intel_gpu_reset(struct drm_device
*dev
)
786 switch (INTEL_INFO(dev
)->gen
) {
788 case 6: return gen6_do_reset(dev
);
789 case 5: return ironlake_do_reset(dev
);
790 case 4: return i965_do_reset(dev
);
791 default: return -ENODEV
;
795 void intel_uncore_clear_errors(struct drm_device
*dev
)
797 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
799 /* XXX needs spinlock around caller's grouping */
800 if (HAS_FPGA_DBG_UNCLAIMED(dev
))
801 __raw_i915_write32(dev_priv
, FPGA_DBG
, FPGA_DBG_RM_NOCLAIM
);
804 void intel_uncore_check_errors(struct drm_device
*dev
)
806 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
808 if (HAS_FPGA_DBG_UNCLAIMED(dev
) &&
809 (__raw_i915_read32(dev_priv
, FPGA_DBG
) & FPGA_DBG_RM_NOCLAIM
)) {
810 DRM_ERROR("Unclaimed register before interrupt\n");
811 __raw_i915_write32(dev_priv
, FPGA_DBG
, FPGA_DBG_RM_NOCLAIM
);