1 /* i915_drv.c -- i830,i845,i855,i865,i915 driver -*- linux-c -*-
5 * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
8 * Permission is hereby granted, free of charge, to any person obtaining a
9 * copy of this software and associated documentation files (the
10 * "Software"), to deal in the Software without restriction, including
11 * without limitation the rights to use, copy, modify, merge, publish,
12 * distribute, sub license, and/or sell copies of the Software, and to
13 * permit persons to whom the Software is furnished to do so, subject to
14 * the following conditions:
16 * The above copyright notice and this permission notice (including the
17 * next paragraph) shall be included in all copies or substantial portions
20 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
21 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
22 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
23 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
24 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
25 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
26 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
30 #include <linux/device.h>
31 #include <linux/acpi.h>
33 #include <drm/i915_drm.h>
35 #include "i915_trace.h"
36 #include "intel_drv.h"
38 #include <linux/console.h>
39 #include <linux/module.h>
40 #include <linux/pm_runtime.h>
41 #include <drm/drm_crtc_helper.h>
43 static struct drm_driver driver
;
45 #define GEN_DEFAULT_PIPEOFFSETS \
46 .pipe_offsets = { PIPE_A_OFFSET, PIPE_B_OFFSET, \
47 PIPE_C_OFFSET, PIPE_EDP_OFFSET }, \
48 .trans_offsets = { TRANSCODER_A_OFFSET, TRANSCODER_B_OFFSET, \
49 TRANSCODER_C_OFFSET, TRANSCODER_EDP_OFFSET }, \
50 .palette_offsets = { PALETTE_A_OFFSET, PALETTE_B_OFFSET }
52 #define GEN_CHV_PIPEOFFSETS \
53 .pipe_offsets = { PIPE_A_OFFSET, PIPE_B_OFFSET, \
54 CHV_PIPE_C_OFFSET }, \
55 .trans_offsets = { TRANSCODER_A_OFFSET, TRANSCODER_B_OFFSET, \
56 CHV_TRANSCODER_C_OFFSET, }, \
57 .palette_offsets = { PALETTE_A_OFFSET, PALETTE_B_OFFSET, \
58 CHV_PALETTE_C_OFFSET }
60 #define CURSOR_OFFSETS \
61 .cursor_offsets = { CURSOR_A_OFFSET, CURSOR_B_OFFSET, CHV_CURSOR_C_OFFSET }
63 #define IVB_CURSOR_OFFSETS \
64 .cursor_offsets = { CURSOR_A_OFFSET, IVB_CURSOR_B_OFFSET, IVB_CURSOR_C_OFFSET }
66 static const struct intel_device_info intel_i830_info
= {
67 .gen
= 2, .is_mobile
= 1, .cursor_needs_physical
= 1, .num_pipes
= 2,
68 .has_overlay
= 1, .overlay_needs_physical
= 1,
69 .ring_mask
= RENDER_RING
,
70 GEN_DEFAULT_PIPEOFFSETS
,
74 static const struct intel_device_info intel_845g_info
= {
75 .gen
= 2, .num_pipes
= 1,
76 .has_overlay
= 1, .overlay_needs_physical
= 1,
77 .ring_mask
= RENDER_RING
,
78 GEN_DEFAULT_PIPEOFFSETS
,
82 static const struct intel_device_info intel_i85x_info
= {
83 .gen
= 2, .is_i85x
= 1, .is_mobile
= 1, .num_pipes
= 2,
84 .cursor_needs_physical
= 1,
85 .has_overlay
= 1, .overlay_needs_physical
= 1,
87 .ring_mask
= RENDER_RING
,
88 GEN_DEFAULT_PIPEOFFSETS
,
92 static const struct intel_device_info intel_i865g_info
= {
93 .gen
= 2, .num_pipes
= 1,
94 .has_overlay
= 1, .overlay_needs_physical
= 1,
95 .ring_mask
= RENDER_RING
,
96 GEN_DEFAULT_PIPEOFFSETS
,
100 static const struct intel_device_info intel_i915g_info
= {
101 .gen
= 3, .is_i915g
= 1, .cursor_needs_physical
= 1, .num_pipes
= 2,
102 .has_overlay
= 1, .overlay_needs_physical
= 1,
103 .ring_mask
= RENDER_RING
,
104 GEN_DEFAULT_PIPEOFFSETS
,
107 static const struct intel_device_info intel_i915gm_info
= {
108 .gen
= 3, .is_mobile
= 1, .num_pipes
= 2,
109 .cursor_needs_physical
= 1,
110 .has_overlay
= 1, .overlay_needs_physical
= 1,
113 .ring_mask
= RENDER_RING
,
114 GEN_DEFAULT_PIPEOFFSETS
,
117 static const struct intel_device_info intel_i945g_info
= {
118 .gen
= 3, .has_hotplug
= 1, .cursor_needs_physical
= 1, .num_pipes
= 2,
119 .has_overlay
= 1, .overlay_needs_physical
= 1,
120 .ring_mask
= RENDER_RING
,
121 GEN_DEFAULT_PIPEOFFSETS
,
124 static const struct intel_device_info intel_i945gm_info
= {
125 .gen
= 3, .is_i945gm
= 1, .is_mobile
= 1, .num_pipes
= 2,
126 .has_hotplug
= 1, .cursor_needs_physical
= 1,
127 .has_overlay
= 1, .overlay_needs_physical
= 1,
130 .ring_mask
= RENDER_RING
,
131 GEN_DEFAULT_PIPEOFFSETS
,
135 static const struct intel_device_info intel_i965g_info
= {
136 .gen
= 4, .is_broadwater
= 1, .num_pipes
= 2,
139 .ring_mask
= RENDER_RING
,
140 GEN_DEFAULT_PIPEOFFSETS
,
144 static const struct intel_device_info intel_i965gm_info
= {
145 .gen
= 4, .is_crestline
= 1, .num_pipes
= 2,
146 .is_mobile
= 1, .has_fbc
= 1, .has_hotplug
= 1,
149 .ring_mask
= RENDER_RING
,
150 GEN_DEFAULT_PIPEOFFSETS
,
154 static const struct intel_device_info intel_g33_info
= {
155 .gen
= 3, .is_g33
= 1, .num_pipes
= 2,
156 .need_gfx_hws
= 1, .has_hotplug
= 1,
158 .ring_mask
= RENDER_RING
,
159 GEN_DEFAULT_PIPEOFFSETS
,
163 static const struct intel_device_info intel_g45_info
= {
164 .gen
= 4, .is_g4x
= 1, .need_gfx_hws
= 1, .num_pipes
= 2,
165 .has_pipe_cxsr
= 1, .has_hotplug
= 1,
166 .ring_mask
= RENDER_RING
| BSD_RING
,
167 GEN_DEFAULT_PIPEOFFSETS
,
171 static const struct intel_device_info intel_gm45_info
= {
172 .gen
= 4, .is_g4x
= 1, .num_pipes
= 2,
173 .is_mobile
= 1, .need_gfx_hws
= 1, .has_fbc
= 1,
174 .has_pipe_cxsr
= 1, .has_hotplug
= 1,
176 .ring_mask
= RENDER_RING
| BSD_RING
,
177 GEN_DEFAULT_PIPEOFFSETS
,
181 static const struct intel_device_info intel_pineview_info
= {
182 .gen
= 3, .is_g33
= 1, .is_pineview
= 1, .is_mobile
= 1, .num_pipes
= 2,
183 .need_gfx_hws
= 1, .has_hotplug
= 1,
185 GEN_DEFAULT_PIPEOFFSETS
,
189 static const struct intel_device_info intel_ironlake_d_info
= {
190 .gen
= 5, .num_pipes
= 2,
191 .need_gfx_hws
= 1, .has_hotplug
= 1,
192 .ring_mask
= RENDER_RING
| BSD_RING
,
193 GEN_DEFAULT_PIPEOFFSETS
,
197 static const struct intel_device_info intel_ironlake_m_info
= {
198 .gen
= 5, .is_mobile
= 1, .num_pipes
= 2,
199 .need_gfx_hws
= 1, .has_hotplug
= 1,
201 .ring_mask
= RENDER_RING
| BSD_RING
,
202 GEN_DEFAULT_PIPEOFFSETS
,
206 static const struct intel_device_info intel_sandybridge_d_info
= {
207 .gen
= 6, .num_pipes
= 2,
208 .need_gfx_hws
= 1, .has_hotplug
= 1,
210 .ring_mask
= RENDER_RING
| BSD_RING
| BLT_RING
,
212 GEN_DEFAULT_PIPEOFFSETS
,
216 static const struct intel_device_info intel_sandybridge_m_info
= {
217 .gen
= 6, .is_mobile
= 1, .num_pipes
= 2,
218 .need_gfx_hws
= 1, .has_hotplug
= 1,
220 .ring_mask
= RENDER_RING
| BSD_RING
| BLT_RING
,
222 GEN_DEFAULT_PIPEOFFSETS
,
226 #define GEN7_FEATURES \
227 .gen = 7, .num_pipes = 3, \
228 .need_gfx_hws = 1, .has_hotplug = 1, \
230 .ring_mask = RENDER_RING | BSD_RING | BLT_RING, \
233 static const struct intel_device_info intel_ivybridge_d_info
= {
236 GEN_DEFAULT_PIPEOFFSETS
,
240 static const struct intel_device_info intel_ivybridge_m_info
= {
244 GEN_DEFAULT_PIPEOFFSETS
,
248 static const struct intel_device_info intel_ivybridge_q_info
= {
251 .num_pipes
= 0, /* legal, last one wins */
252 GEN_DEFAULT_PIPEOFFSETS
,
256 static const struct intel_device_info intel_valleyview_m_info
= {
261 .display_mmio_offset
= VLV_DISPLAY_BASE
,
262 .has_fbc
= 0, /* legal, last one wins */
263 .has_llc
= 0, /* legal, last one wins */
264 GEN_DEFAULT_PIPEOFFSETS
,
268 static const struct intel_device_info intel_valleyview_d_info
= {
272 .display_mmio_offset
= VLV_DISPLAY_BASE
,
273 .has_fbc
= 0, /* legal, last one wins */
274 .has_llc
= 0, /* legal, last one wins */
275 GEN_DEFAULT_PIPEOFFSETS
,
279 static const struct intel_device_info intel_haswell_d_info
= {
284 .ring_mask
= RENDER_RING
| BSD_RING
| BLT_RING
| VEBOX_RING
,
285 GEN_DEFAULT_PIPEOFFSETS
,
289 static const struct intel_device_info intel_haswell_m_info
= {
295 .ring_mask
= RENDER_RING
| BSD_RING
| BLT_RING
| VEBOX_RING
,
296 GEN_DEFAULT_PIPEOFFSETS
,
300 static const struct intel_device_info intel_broadwell_d_info
= {
301 .gen
= 8, .num_pipes
= 3,
302 .need_gfx_hws
= 1, .has_hotplug
= 1,
303 .ring_mask
= RENDER_RING
| BSD_RING
| BLT_RING
| VEBOX_RING
,
308 GEN_DEFAULT_PIPEOFFSETS
,
312 static const struct intel_device_info intel_broadwell_m_info
= {
313 .gen
= 8, .is_mobile
= 1, .num_pipes
= 3,
314 .need_gfx_hws
= 1, .has_hotplug
= 1,
315 .ring_mask
= RENDER_RING
| BSD_RING
| BLT_RING
| VEBOX_RING
,
320 GEN_DEFAULT_PIPEOFFSETS
,
324 static const struct intel_device_info intel_broadwell_gt3d_info
= {
325 .gen
= 8, .num_pipes
= 3,
326 .need_gfx_hws
= 1, .has_hotplug
= 1,
327 .ring_mask
= RENDER_RING
| BSD_RING
| BLT_RING
| VEBOX_RING
| BSD2_RING
,
332 GEN_DEFAULT_PIPEOFFSETS
,
336 static const struct intel_device_info intel_broadwell_gt3m_info
= {
337 .gen
= 8, .is_mobile
= 1, .num_pipes
= 3,
338 .need_gfx_hws
= 1, .has_hotplug
= 1,
339 .ring_mask
= RENDER_RING
| BSD_RING
| BLT_RING
| VEBOX_RING
| BSD2_RING
,
344 GEN_DEFAULT_PIPEOFFSETS
,
348 static const struct intel_device_info intel_cherryview_info
= {
350 .gen
= 8, .num_pipes
= 3,
351 .need_gfx_hws
= 1, .has_hotplug
= 1,
352 .ring_mask
= RENDER_RING
| BSD_RING
| BLT_RING
| VEBOX_RING
,
354 .display_mmio_offset
= VLV_DISPLAY_BASE
,
360 * Make sure any device matches here are from most specific to most
361 * general. For example, since the Quanta match is based on the subsystem
362 * and subvendor IDs, we need it to come before the more general IVB
363 * PCI ID matches, otherwise we'll use the wrong info struct above.
365 #define INTEL_PCI_IDS \
366 INTEL_I830_IDS(&intel_i830_info), \
367 INTEL_I845G_IDS(&intel_845g_info), \
368 INTEL_I85X_IDS(&intel_i85x_info), \
369 INTEL_I865G_IDS(&intel_i865g_info), \
370 INTEL_I915G_IDS(&intel_i915g_info), \
371 INTEL_I915GM_IDS(&intel_i915gm_info), \
372 INTEL_I945G_IDS(&intel_i945g_info), \
373 INTEL_I945GM_IDS(&intel_i945gm_info), \
374 INTEL_I965G_IDS(&intel_i965g_info), \
375 INTEL_G33_IDS(&intel_g33_info), \
376 INTEL_I965GM_IDS(&intel_i965gm_info), \
377 INTEL_GM45_IDS(&intel_gm45_info), \
378 INTEL_G45_IDS(&intel_g45_info), \
379 INTEL_PINEVIEW_IDS(&intel_pineview_info), \
380 INTEL_IRONLAKE_D_IDS(&intel_ironlake_d_info), \
381 INTEL_IRONLAKE_M_IDS(&intel_ironlake_m_info), \
382 INTEL_SNB_D_IDS(&intel_sandybridge_d_info), \
383 INTEL_SNB_M_IDS(&intel_sandybridge_m_info), \
384 INTEL_IVB_Q_IDS(&intel_ivybridge_q_info), /* must be first IVB */ \
385 INTEL_IVB_M_IDS(&intel_ivybridge_m_info), \
386 INTEL_IVB_D_IDS(&intel_ivybridge_d_info), \
387 INTEL_HSW_D_IDS(&intel_haswell_d_info), \
388 INTEL_HSW_M_IDS(&intel_haswell_m_info), \
389 INTEL_VLV_M_IDS(&intel_valleyview_m_info), \
390 INTEL_VLV_D_IDS(&intel_valleyview_d_info), \
391 INTEL_BDW_GT12M_IDS(&intel_broadwell_m_info), \
392 INTEL_BDW_GT12D_IDS(&intel_broadwell_d_info), \
393 INTEL_BDW_GT3M_IDS(&intel_broadwell_gt3m_info), \
394 INTEL_BDW_GT3D_IDS(&intel_broadwell_gt3d_info), \
395 INTEL_CHV_IDS(&intel_cherryview_info)
397 static const struct pci_device_id pciidlist
[] = { /* aka */
402 #if defined(CONFIG_DRM_I915_KMS)
403 MODULE_DEVICE_TABLE(pci
, pciidlist
);
406 void intel_detect_pch(struct drm_device
*dev
)
408 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
409 struct pci_dev
*pch
= NULL
;
411 /* In all current cases, num_pipes is equivalent to the PCH_NOP setting
412 * (which really amounts to a PCH but no South Display).
414 if (INTEL_INFO(dev
)->num_pipes
== 0) {
415 dev_priv
->pch_type
= PCH_NOP
;
420 * The reason to probe ISA bridge instead of Dev31:Fun0 is to
421 * make graphics device passthrough work easy for VMM, that only
422 * need to expose ISA bridge to let driver know the real hardware
423 * underneath. This is a requirement from virtualization team.
425 * In some virtualized environments (e.g. XEN), there is irrelevant
426 * ISA bridge in the system. To work reliably, we should scan trhough
427 * all the ISA bridge devices and check for the first match, instead
428 * of only checking the first one.
430 while ((pch
= pci_get_class(PCI_CLASS_BRIDGE_ISA
<< 8, pch
))) {
431 if (pch
->vendor
== PCI_VENDOR_ID_INTEL
) {
432 unsigned short id
= pch
->device
& INTEL_PCH_DEVICE_ID_MASK
;
433 dev_priv
->pch_id
= id
;
435 if (id
== INTEL_PCH_IBX_DEVICE_ID_TYPE
) {
436 dev_priv
->pch_type
= PCH_IBX
;
437 DRM_DEBUG_KMS("Found Ibex Peak PCH\n");
438 WARN_ON(!IS_GEN5(dev
));
439 } else if (id
== INTEL_PCH_CPT_DEVICE_ID_TYPE
) {
440 dev_priv
->pch_type
= PCH_CPT
;
441 DRM_DEBUG_KMS("Found CougarPoint PCH\n");
442 WARN_ON(!(IS_GEN6(dev
) || IS_IVYBRIDGE(dev
)));
443 } else if (id
== INTEL_PCH_PPT_DEVICE_ID_TYPE
) {
444 /* PantherPoint is CPT compatible */
445 dev_priv
->pch_type
= PCH_CPT
;
446 DRM_DEBUG_KMS("Found PantherPoint PCH\n");
447 WARN_ON(!(IS_GEN6(dev
) || IS_IVYBRIDGE(dev
)));
448 } else if (id
== INTEL_PCH_LPT_DEVICE_ID_TYPE
) {
449 dev_priv
->pch_type
= PCH_LPT
;
450 DRM_DEBUG_KMS("Found LynxPoint PCH\n");
451 WARN_ON(!IS_HASWELL(dev
));
452 WARN_ON(IS_ULT(dev
));
453 } else if (IS_BROADWELL(dev
)) {
454 dev_priv
->pch_type
= PCH_LPT
;
456 INTEL_PCH_LPT_LP_DEVICE_ID_TYPE
;
457 DRM_DEBUG_KMS("This is Broadwell, assuming "
458 "LynxPoint LP PCH\n");
459 } else if (id
== INTEL_PCH_LPT_LP_DEVICE_ID_TYPE
) {
460 dev_priv
->pch_type
= PCH_LPT
;
461 DRM_DEBUG_KMS("Found LynxPoint LP PCH\n");
462 WARN_ON(!IS_HASWELL(dev
));
463 WARN_ON(!IS_ULT(dev
));
471 DRM_DEBUG_KMS("No PCH found.\n");
476 bool i915_semaphore_is_enabled(struct drm_device
*dev
)
478 if (INTEL_INFO(dev
)->gen
< 6)
481 if (i915
.semaphores
>= 0)
482 return i915
.semaphores
;
484 #ifdef CONFIG_INTEL_IOMMU
485 /* Enable semaphores on SNB when IO remapping is off */
486 if (INTEL_INFO(dev
)->gen
== 6 && intel_iommu_gfx_mapped
)
493 static int i915_drm_freeze(struct drm_device
*dev
)
495 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
496 struct drm_crtc
*crtc
;
497 pci_power_t opregion_target_state
;
499 /* ignore lid events during suspend */
500 mutex_lock(&dev_priv
->modeset_restore_lock
);
501 dev_priv
->modeset_restore
= MODESET_SUSPENDED
;
502 mutex_unlock(&dev_priv
->modeset_restore_lock
);
504 /* We do a lot of poking in a lot of registers, make sure they work
506 intel_display_set_init_power(dev_priv
, true);
508 drm_kms_helper_poll_disable(dev
);
510 pci_save_state(dev
->pdev
);
512 /* If KMS is active, we do the leavevt stuff here */
513 if (drm_core_check_feature(dev
, DRIVER_MODESET
)) {
516 error
= i915_gem_suspend(dev
);
518 dev_err(&dev
->pdev
->dev
,
519 "GEM idle failed, resume might fail\n");
524 * Disable CRTCs directly since we want to preserve sw state
525 * for _thaw. Also, power gate the CRTC power wells.
527 drm_modeset_lock_all(dev
);
528 for_each_crtc(dev
, crtc
)
529 intel_crtc_control(crtc
, false);
530 drm_modeset_unlock_all(dev
);
532 intel_dp_mst_suspend(dev
);
534 flush_delayed_work(&dev_priv
->rps
.delayed_resume_work
);
536 intel_runtime_pm_disable_interrupts(dev
);
538 intel_suspend_gt_powersave(dev
);
540 intel_modeset_suspend_hw(dev
);
543 i915_gem_suspend_gtt_mappings(dev
);
545 i915_save_state(dev
);
547 opregion_target_state
= PCI_D3cold
;
548 #if IS_ENABLED(CONFIG_ACPI_SLEEP)
549 if (acpi_target_system_state() < ACPI_STATE_S3
)
550 opregion_target_state
= PCI_D1
;
552 intel_opregion_notify_adapter(dev
, opregion_target_state
);
554 intel_uncore_forcewake_reset(dev
, false);
555 intel_opregion_fini(dev
);
558 intel_fbdev_set_suspend(dev
, FBINFO_STATE_SUSPENDED
);
561 dev_priv
->suspend_count
++;
563 intel_display_set_init_power(dev_priv
, false);
568 int i915_suspend(struct drm_device
*dev
, pm_message_t state
)
572 if (!dev
|| !dev
->dev_private
) {
573 DRM_ERROR("dev: %p\n", dev
);
574 DRM_ERROR("DRM not initialized, aborting suspend.\n");
578 if (state
.event
== PM_EVENT_PRETHAW
)
582 if (dev
->switch_power_state
== DRM_SWITCH_POWER_OFF
)
585 error
= i915_drm_freeze(dev
);
589 if (state
.event
== PM_EVENT_SUSPEND
) {
590 /* Shut down the device */
591 pci_disable_device(dev
->pdev
);
592 pci_set_power_state(dev
->pdev
, PCI_D3hot
);
598 void intel_console_resume(struct work_struct
*work
)
600 struct drm_i915_private
*dev_priv
=
601 container_of(work
, struct drm_i915_private
,
602 console_resume_work
);
603 struct drm_device
*dev
= dev_priv
->dev
;
606 intel_fbdev_set_suspend(dev
, FBINFO_STATE_RUNNING
);
610 static int i915_drm_thaw_early(struct drm_device
*dev
)
612 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
614 if (IS_HASWELL(dev
) || IS_BROADWELL(dev
))
615 hsw_disable_pc8(dev_priv
);
617 intel_uncore_early_sanitize(dev
, true);
618 intel_uncore_sanitize(dev
);
619 intel_power_domains_init_hw(dev_priv
);
624 static int __i915_drm_thaw(struct drm_device
*dev
, bool restore_gtt_mappings
)
626 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
628 if (drm_core_check_feature(dev
, DRIVER_MODESET
) &&
629 restore_gtt_mappings
) {
630 mutex_lock(&dev
->struct_mutex
);
631 i915_gem_restore_gtt_mappings(dev
);
632 mutex_unlock(&dev
->struct_mutex
);
635 i915_restore_state(dev
);
636 intel_opregion_setup(dev
);
638 /* KMS EnterVT equivalent */
639 if (drm_core_check_feature(dev
, DRIVER_MODESET
)) {
640 intel_init_pch_refclk(dev
);
641 drm_mode_config_reset(dev
);
643 mutex_lock(&dev
->struct_mutex
);
644 if (i915_gem_init_hw(dev
)) {
645 DRM_ERROR("failed to re-initialize GPU, declaring wedged!\n");
646 atomic_set_mask(I915_WEDGED
, &dev_priv
->gpu_error
.reset_counter
);
648 mutex_unlock(&dev
->struct_mutex
);
650 intel_runtime_pm_restore_interrupts(dev
);
652 intel_modeset_init_hw(dev
);
655 unsigned long irqflags
;
656 spin_lock_irqsave(&dev_priv
->irq_lock
, irqflags
);
657 if (dev_priv
->display
.hpd_irq_setup
)
658 dev_priv
->display
.hpd_irq_setup(dev
);
659 spin_unlock_irqrestore(&dev_priv
->irq_lock
, irqflags
);
662 intel_dp_mst_resume(dev
);
663 drm_modeset_lock_all(dev
);
664 intel_modeset_setup_hw_state(dev
, true);
665 drm_modeset_unlock_all(dev
);
668 * ... but also need to make sure that hotplug processing
669 * doesn't cause havoc. Like in the driver load code we don't
670 * bother with the tiny race here where we might loose hotplug
674 /* Config may have changed between suspend and resume */
675 drm_helper_hpd_irq_event(dev
);
678 intel_opregion_init(dev
);
681 * The console lock can be pretty contented on resume due
682 * to all the printk activity. Try to keep it out of the hot
683 * path of resume if possible.
685 if (console_trylock()) {
686 intel_fbdev_set_suspend(dev
, FBINFO_STATE_RUNNING
);
689 schedule_work(&dev_priv
->console_resume_work
);
692 mutex_lock(&dev_priv
->modeset_restore_lock
);
693 dev_priv
->modeset_restore
= MODESET_DONE
;
694 mutex_unlock(&dev_priv
->modeset_restore_lock
);
696 intel_opregion_notify_adapter(dev
, PCI_D0
);
701 static int i915_drm_thaw(struct drm_device
*dev
)
703 if (drm_core_check_feature(dev
, DRIVER_MODESET
))
704 i915_check_and_clear_faults(dev
);
706 return __i915_drm_thaw(dev
, true);
709 static int i915_resume_early(struct drm_device
*dev
)
711 if (dev
->switch_power_state
== DRM_SWITCH_POWER_OFF
)
715 * We have a resume ordering issue with the snd-hda driver also
716 * requiring our device to be power up. Due to the lack of a
717 * parent/child relationship we currently solve this with an early
720 * FIXME: This should be solved with a special hdmi sink device or
721 * similar so that power domains can be employed.
723 if (pci_enable_device(dev
->pdev
))
726 pci_set_master(dev
->pdev
);
728 return i915_drm_thaw_early(dev
);
731 int i915_resume(struct drm_device
*dev
)
733 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
737 * Platforms with opregion should have sane BIOS, older ones (gen3 and
738 * earlier) need to restore the GTT mappings since the BIOS might clear
739 * all our scratch PTEs.
741 ret
= __i915_drm_thaw(dev
, !dev_priv
->opregion
.header
);
745 drm_kms_helper_poll_enable(dev
);
749 static int i915_resume_legacy(struct drm_device
*dev
)
751 i915_resume_early(dev
);
758 * i915_reset - reset chip after a hang
759 * @dev: drm device to reset
761 * Reset the chip. Useful if a hang is detected. Returns zero on successful
762 * reset or otherwise an error code.
764 * Procedure is fairly simple:
765 * - reset the chip using the reset reg
766 * - re-init context state
767 * - re-init hardware status page
768 * - re-init ring buffer
769 * - re-init interrupt state
772 int i915_reset(struct drm_device
*dev
)
774 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
781 mutex_lock(&dev
->struct_mutex
);
785 simulated
= dev_priv
->gpu_error
.stop_rings
!= 0;
787 ret
= intel_gpu_reset(dev
);
789 /* Also reset the gpu hangman. */
791 DRM_INFO("Simulated gpu hang, resetting stop_rings\n");
792 dev_priv
->gpu_error
.stop_rings
= 0;
793 if (ret
== -ENODEV
) {
794 DRM_INFO("Reset not implemented, but ignoring "
795 "error for simulated gpu hangs\n");
801 DRM_ERROR("Failed to reset chip: %i\n", ret
);
802 mutex_unlock(&dev
->struct_mutex
);
806 /* Ok, now get things going again... */
809 * Everything depends on having the GTT running, so we need to start
810 * there. Fortunately we don't need to do this unless we reset the
811 * chip at a PCI level.
813 * Next we need to restore the context, but we don't use those
816 * Ring buffer needs to be re-initialized in the KMS case, or if X
817 * was running at the time of the reset (i.e. we weren't VT
820 if (drm_core_check_feature(dev
, DRIVER_MODESET
) ||
821 !dev_priv
->ums
.mm_suspended
) {
822 dev_priv
->ums
.mm_suspended
= 0;
824 ret
= i915_gem_init_hw(dev
);
825 mutex_unlock(&dev
->struct_mutex
);
827 DRM_ERROR("Failed hw init on reset %d\n", ret
);
832 * FIXME: This races pretty badly against concurrent holders of
833 * ring interrupts. This is possible since we've started to drop
834 * dev->struct_mutex in select places when waiting for the gpu.
838 * rps/rc6 re-init is necessary to restore state lost after the
839 * reset and the re-install of gt irqs. Skip for ironlake per
840 * previous concerns that it doesn't respond well to some forms
841 * of re-init after reset.
843 if (INTEL_INFO(dev
)->gen
> 5)
844 intel_reset_gt_powersave(dev
);
848 mutex_unlock(&dev
->struct_mutex
);
854 static int i915_pci_probe(struct pci_dev
*pdev
, const struct pci_device_id
*ent
)
856 struct intel_device_info
*intel_info
=
857 (struct intel_device_info
*) ent
->driver_data
;
859 if (IS_PRELIMINARY_HW(intel_info
) && !i915
.preliminary_hw_support
) {
860 DRM_INFO("This hardware requires preliminary hardware support.\n"
861 "See CONFIG_DRM_I915_PRELIMINARY_HW_SUPPORT, and/or modparam preliminary_hw_support\n");
865 /* Only bind to function 0 of the device. Early generations
866 * used function 1 as a placeholder for multi-head. This causes
867 * us confusion instead, especially on the systems where both
868 * functions have the same PCI-ID!
870 if (PCI_FUNC(pdev
->devfn
))
873 driver
.driver_features
&= ~(DRIVER_USE_AGP
);
875 return drm_get_pci_dev(pdev
, ent
, &driver
);
879 i915_pci_remove(struct pci_dev
*pdev
)
881 struct drm_device
*dev
= pci_get_drvdata(pdev
);
886 static int i915_pm_suspend(struct device
*dev
)
888 struct pci_dev
*pdev
= to_pci_dev(dev
);
889 struct drm_device
*drm_dev
= pci_get_drvdata(pdev
);
891 if (!drm_dev
|| !drm_dev
->dev_private
) {
892 dev_err(dev
, "DRM not initialized, aborting suspend.\n");
896 if (drm_dev
->switch_power_state
== DRM_SWITCH_POWER_OFF
)
899 return i915_drm_freeze(drm_dev
);
902 static int i915_pm_suspend_late(struct device
*dev
)
904 struct pci_dev
*pdev
= to_pci_dev(dev
);
905 struct drm_device
*drm_dev
= pci_get_drvdata(pdev
);
906 struct drm_i915_private
*dev_priv
= drm_dev
->dev_private
;
909 * We have a suspedn ordering issue with the snd-hda driver also
910 * requiring our device to be power up. Due to the lack of a
911 * parent/child relationship we currently solve this with an late
914 * FIXME: This should be solved with a special hdmi sink device or
915 * similar so that power domains can be employed.
917 if (drm_dev
->switch_power_state
== DRM_SWITCH_POWER_OFF
)
920 if (IS_HASWELL(drm_dev
) || IS_BROADWELL(drm_dev
))
921 hsw_enable_pc8(dev_priv
);
923 pci_disable_device(pdev
);
924 pci_set_power_state(pdev
, PCI_D3hot
);
929 static int i915_pm_resume_early(struct device
*dev
)
931 struct pci_dev
*pdev
= to_pci_dev(dev
);
932 struct drm_device
*drm_dev
= pci_get_drvdata(pdev
);
934 return i915_resume_early(drm_dev
);
937 static int i915_pm_resume(struct device
*dev
)
939 struct pci_dev
*pdev
= to_pci_dev(dev
);
940 struct drm_device
*drm_dev
= pci_get_drvdata(pdev
);
942 return i915_resume(drm_dev
);
945 static int i915_pm_freeze(struct device
*dev
)
947 struct pci_dev
*pdev
= to_pci_dev(dev
);
948 struct drm_device
*drm_dev
= pci_get_drvdata(pdev
);
950 if (!drm_dev
|| !drm_dev
->dev_private
) {
951 dev_err(dev
, "DRM not initialized, aborting suspend.\n");
955 return i915_drm_freeze(drm_dev
);
958 static int i915_pm_thaw_early(struct device
*dev
)
960 struct pci_dev
*pdev
= to_pci_dev(dev
);
961 struct drm_device
*drm_dev
= pci_get_drvdata(pdev
);
963 return i915_drm_thaw_early(drm_dev
);
966 static int i915_pm_thaw(struct device
*dev
)
968 struct pci_dev
*pdev
= to_pci_dev(dev
);
969 struct drm_device
*drm_dev
= pci_get_drvdata(pdev
);
971 return i915_drm_thaw(drm_dev
);
974 static int i915_pm_poweroff(struct device
*dev
)
976 struct pci_dev
*pdev
= to_pci_dev(dev
);
977 struct drm_device
*drm_dev
= pci_get_drvdata(pdev
);
979 return i915_drm_freeze(drm_dev
);
982 static int hsw_runtime_suspend(struct drm_i915_private
*dev_priv
)
984 hsw_enable_pc8(dev_priv
);
989 static int snb_runtime_resume(struct drm_i915_private
*dev_priv
)
991 struct drm_device
*dev
= dev_priv
->dev
;
993 intel_init_pch_refclk(dev
);
998 static int hsw_runtime_resume(struct drm_i915_private
*dev_priv
)
1000 hsw_disable_pc8(dev_priv
);
1006 * Save all Gunit registers that may be lost after a D3 and a subsequent
1007 * S0i[R123] transition. The list of registers needing a save/restore is
1008 * defined in the VLV2_S0IXRegs document. This documents marks all Gunit
1009 * registers in the following way:
1010 * - Driver: saved/restored by the driver
1011 * - Punit : saved/restored by the Punit firmware
1012 * - No, w/o marking: no need to save/restore, since the register is R/O or
1013 * used internally by the HW in a way that doesn't depend
1014 * keeping the content across a suspend/resume.
1015 * - Debug : used for debugging
1017 * We save/restore all registers marked with 'Driver', with the following
1019 * - Registers out of use, including also registers marked with 'Debug'.
1020 * These have no effect on the driver's operation, so we don't save/restore
1021 * them to reduce the overhead.
1022 * - Registers that are fully setup by an initialization function called from
1023 * the resume path. For example many clock gating and RPS/RC6 registers.
1024 * - Registers that provide the right functionality with their reset defaults.
1026 * TODO: Except for registers that based on the above 3 criteria can be safely
1027 * ignored, we save/restore all others, practically treating the HW context as
1028 * a black-box for the driver. Further investigation is needed to reduce the
1029 * saved/restored registers even further, by following the same 3 criteria.
1031 static void vlv_save_gunit_s0ix_state(struct drm_i915_private
*dev_priv
)
1033 struct vlv_s0ix_state
*s
= &dev_priv
->vlv_s0ix_state
;
1036 /* GAM 0x4000-0x4770 */
1037 s
->wr_watermark
= I915_READ(GEN7_WR_WATERMARK
);
1038 s
->gfx_prio_ctrl
= I915_READ(GEN7_GFX_PRIO_CTRL
);
1039 s
->arb_mode
= I915_READ(ARB_MODE
);
1040 s
->gfx_pend_tlb0
= I915_READ(GEN7_GFX_PEND_TLB0
);
1041 s
->gfx_pend_tlb1
= I915_READ(GEN7_GFX_PEND_TLB1
);
1043 for (i
= 0; i
< ARRAY_SIZE(s
->lra_limits
); i
++)
1044 s
->lra_limits
[i
] = I915_READ(GEN7_LRA_LIMITS_BASE
+ i
* 4);
1046 s
->media_max_req_count
= I915_READ(GEN7_MEDIA_MAX_REQ_COUNT
);
1047 s
->gfx_max_req_count
= I915_READ(GEN7_MEDIA_MAX_REQ_COUNT
);
1049 s
->render_hwsp
= I915_READ(RENDER_HWS_PGA_GEN7
);
1050 s
->ecochk
= I915_READ(GAM_ECOCHK
);
1051 s
->bsd_hwsp
= I915_READ(BSD_HWS_PGA_GEN7
);
1052 s
->blt_hwsp
= I915_READ(BLT_HWS_PGA_GEN7
);
1054 s
->tlb_rd_addr
= I915_READ(GEN7_TLB_RD_ADDR
);
1056 /* MBC 0x9024-0x91D0, 0x8500 */
1057 s
->g3dctl
= I915_READ(VLV_G3DCTL
);
1058 s
->gsckgctl
= I915_READ(VLV_GSCKGCTL
);
1059 s
->mbctl
= I915_READ(GEN6_MBCTL
);
1061 /* GCP 0x9400-0x9424, 0x8100-0x810C */
1062 s
->ucgctl1
= I915_READ(GEN6_UCGCTL1
);
1063 s
->ucgctl3
= I915_READ(GEN6_UCGCTL3
);
1064 s
->rcgctl1
= I915_READ(GEN6_RCGCTL1
);
1065 s
->rcgctl2
= I915_READ(GEN6_RCGCTL2
);
1066 s
->rstctl
= I915_READ(GEN6_RSTCTL
);
1067 s
->misccpctl
= I915_READ(GEN7_MISCCPCTL
);
1069 /* GPM 0xA000-0xAA84, 0x8000-0x80FC */
1070 s
->gfxpause
= I915_READ(GEN6_GFXPAUSE
);
1071 s
->rpdeuhwtc
= I915_READ(GEN6_RPDEUHWTC
);
1072 s
->rpdeuc
= I915_READ(GEN6_RPDEUC
);
1073 s
->ecobus
= I915_READ(ECOBUS
);
1074 s
->pwrdwnupctl
= I915_READ(VLV_PWRDWNUPCTL
);
1075 s
->rp_down_timeout
= I915_READ(GEN6_RP_DOWN_TIMEOUT
);
1076 s
->rp_deucsw
= I915_READ(GEN6_RPDEUCSW
);
1077 s
->rcubmabdtmr
= I915_READ(GEN6_RCUBMABDTMR
);
1078 s
->rcedata
= I915_READ(VLV_RCEDATA
);
1079 s
->spare2gh
= I915_READ(VLV_SPAREG2H
);
1081 /* Display CZ domain, 0x4400C-0x4402C, 0x4F000-0x4F11F */
1082 s
->gt_imr
= I915_READ(GTIMR
);
1083 s
->gt_ier
= I915_READ(GTIER
);
1084 s
->pm_imr
= I915_READ(GEN6_PMIMR
);
1085 s
->pm_ier
= I915_READ(GEN6_PMIER
);
1087 for (i
= 0; i
< ARRAY_SIZE(s
->gt_scratch
); i
++)
1088 s
->gt_scratch
[i
] = I915_READ(GEN7_GT_SCRATCH_BASE
+ i
* 4);
1090 /* GT SA CZ domain, 0x100000-0x138124 */
1091 s
->tilectl
= I915_READ(TILECTL
);
1092 s
->gt_fifoctl
= I915_READ(GTFIFOCTL
);
1093 s
->gtlc_wake_ctrl
= I915_READ(VLV_GTLC_WAKE_CTRL
);
1094 s
->gtlc_survive
= I915_READ(VLV_GTLC_SURVIVABILITY_REG
);
1095 s
->pmwgicz
= I915_READ(VLV_PMWGICZ
);
1097 /* Gunit-Display CZ domain, 0x182028-0x1821CF */
1098 s
->gu_ctl0
= I915_READ(VLV_GU_CTL0
);
1099 s
->gu_ctl1
= I915_READ(VLV_GU_CTL1
);
1100 s
->clock_gate_dis2
= I915_READ(VLV_GUNIT_CLOCK_GATE2
);
1103 * Not saving any of:
1104 * DFT, 0x9800-0x9EC0
1105 * SARB, 0xB000-0xB1FC
1106 * GAC, 0x5208-0x524C, 0x14000-0x14C000
1111 static void vlv_restore_gunit_s0ix_state(struct drm_i915_private
*dev_priv
)
1113 struct vlv_s0ix_state
*s
= &dev_priv
->vlv_s0ix_state
;
1117 /* GAM 0x4000-0x4770 */
1118 I915_WRITE(GEN7_WR_WATERMARK
, s
->wr_watermark
);
1119 I915_WRITE(GEN7_GFX_PRIO_CTRL
, s
->gfx_prio_ctrl
);
1120 I915_WRITE(ARB_MODE
, s
->arb_mode
| (0xffff << 16));
1121 I915_WRITE(GEN7_GFX_PEND_TLB0
, s
->gfx_pend_tlb0
);
1122 I915_WRITE(GEN7_GFX_PEND_TLB1
, s
->gfx_pend_tlb1
);
1124 for (i
= 0; i
< ARRAY_SIZE(s
->lra_limits
); i
++)
1125 I915_WRITE(GEN7_LRA_LIMITS_BASE
+ i
* 4, s
->lra_limits
[i
]);
1127 I915_WRITE(GEN7_MEDIA_MAX_REQ_COUNT
, s
->media_max_req_count
);
1128 I915_WRITE(GEN7_MEDIA_MAX_REQ_COUNT
, s
->gfx_max_req_count
);
1130 I915_WRITE(RENDER_HWS_PGA_GEN7
, s
->render_hwsp
);
1131 I915_WRITE(GAM_ECOCHK
, s
->ecochk
);
1132 I915_WRITE(BSD_HWS_PGA_GEN7
, s
->bsd_hwsp
);
1133 I915_WRITE(BLT_HWS_PGA_GEN7
, s
->blt_hwsp
);
1135 I915_WRITE(GEN7_TLB_RD_ADDR
, s
->tlb_rd_addr
);
1137 /* MBC 0x9024-0x91D0, 0x8500 */
1138 I915_WRITE(VLV_G3DCTL
, s
->g3dctl
);
1139 I915_WRITE(VLV_GSCKGCTL
, s
->gsckgctl
);
1140 I915_WRITE(GEN6_MBCTL
, s
->mbctl
);
1142 /* GCP 0x9400-0x9424, 0x8100-0x810C */
1143 I915_WRITE(GEN6_UCGCTL1
, s
->ucgctl1
);
1144 I915_WRITE(GEN6_UCGCTL3
, s
->ucgctl3
);
1145 I915_WRITE(GEN6_RCGCTL1
, s
->rcgctl1
);
1146 I915_WRITE(GEN6_RCGCTL2
, s
->rcgctl2
);
1147 I915_WRITE(GEN6_RSTCTL
, s
->rstctl
);
1148 I915_WRITE(GEN7_MISCCPCTL
, s
->misccpctl
);
1150 /* GPM 0xA000-0xAA84, 0x8000-0x80FC */
1151 I915_WRITE(GEN6_GFXPAUSE
, s
->gfxpause
);
1152 I915_WRITE(GEN6_RPDEUHWTC
, s
->rpdeuhwtc
);
1153 I915_WRITE(GEN6_RPDEUC
, s
->rpdeuc
);
1154 I915_WRITE(ECOBUS
, s
->ecobus
);
1155 I915_WRITE(VLV_PWRDWNUPCTL
, s
->pwrdwnupctl
);
1156 I915_WRITE(GEN6_RP_DOWN_TIMEOUT
,s
->rp_down_timeout
);
1157 I915_WRITE(GEN6_RPDEUCSW
, s
->rp_deucsw
);
1158 I915_WRITE(GEN6_RCUBMABDTMR
, s
->rcubmabdtmr
);
1159 I915_WRITE(VLV_RCEDATA
, s
->rcedata
);
1160 I915_WRITE(VLV_SPAREG2H
, s
->spare2gh
);
1162 /* Display CZ domain, 0x4400C-0x4402C, 0x4F000-0x4F11F */
1163 I915_WRITE(GTIMR
, s
->gt_imr
);
1164 I915_WRITE(GTIER
, s
->gt_ier
);
1165 I915_WRITE(GEN6_PMIMR
, s
->pm_imr
);
1166 I915_WRITE(GEN6_PMIER
, s
->pm_ier
);
1168 for (i
= 0; i
< ARRAY_SIZE(s
->gt_scratch
); i
++)
1169 I915_WRITE(GEN7_GT_SCRATCH_BASE
+ i
* 4, s
->gt_scratch
[i
]);
1171 /* GT SA CZ domain, 0x100000-0x138124 */
1172 I915_WRITE(TILECTL
, s
->tilectl
);
1173 I915_WRITE(GTFIFOCTL
, s
->gt_fifoctl
);
1175 * Preserve the GT allow wake and GFX force clock bit, they are not
1176 * be restored, as they are used to control the s0ix suspend/resume
1177 * sequence by the caller.
1179 val
= I915_READ(VLV_GTLC_WAKE_CTRL
);
1180 val
&= VLV_GTLC_ALLOWWAKEREQ
;
1181 val
|= s
->gtlc_wake_ctrl
& ~VLV_GTLC_ALLOWWAKEREQ
;
1182 I915_WRITE(VLV_GTLC_WAKE_CTRL
, val
);
1184 val
= I915_READ(VLV_GTLC_SURVIVABILITY_REG
);
1185 val
&= VLV_GFX_CLK_FORCE_ON_BIT
;
1186 val
|= s
->gtlc_survive
& ~VLV_GFX_CLK_FORCE_ON_BIT
;
1187 I915_WRITE(VLV_GTLC_SURVIVABILITY_REG
, val
);
1189 I915_WRITE(VLV_PMWGICZ
, s
->pmwgicz
);
1191 /* Gunit-Display CZ domain, 0x182028-0x1821CF */
1192 I915_WRITE(VLV_GU_CTL0
, s
->gu_ctl0
);
1193 I915_WRITE(VLV_GU_CTL1
, s
->gu_ctl1
);
1194 I915_WRITE(VLV_GUNIT_CLOCK_GATE2
, s
->clock_gate_dis2
);
1197 int vlv_force_gfx_clock(struct drm_i915_private
*dev_priv
, bool force_on
)
1202 val
= I915_READ(VLV_GTLC_SURVIVABILITY_REG
);
1203 WARN_ON(!!(val
& VLV_GFX_CLK_FORCE_ON_BIT
) == force_on
);
1205 #define COND (I915_READ(VLV_GTLC_SURVIVABILITY_REG) & VLV_GFX_CLK_STATUS_BIT)
1206 /* Wait for a previous force-off to settle */
1208 err
= wait_for(!COND
, 20);
1210 DRM_ERROR("timeout waiting for GFX clock force-off (%08x)\n",
1211 I915_READ(VLV_GTLC_SURVIVABILITY_REG
));
1216 val
= I915_READ(VLV_GTLC_SURVIVABILITY_REG
);
1217 val
&= ~VLV_GFX_CLK_FORCE_ON_BIT
;
1219 val
|= VLV_GFX_CLK_FORCE_ON_BIT
;
1220 I915_WRITE(VLV_GTLC_SURVIVABILITY_REG
, val
);
1225 err
= wait_for(COND
, 20);
1227 DRM_ERROR("timeout waiting for GFX clock force-on (%08x)\n",
1228 I915_READ(VLV_GTLC_SURVIVABILITY_REG
));
1234 static int vlv_allow_gt_wake(struct drm_i915_private
*dev_priv
, bool allow
)
1239 val
= I915_READ(VLV_GTLC_WAKE_CTRL
);
1240 val
&= ~VLV_GTLC_ALLOWWAKEREQ
;
1242 val
|= VLV_GTLC_ALLOWWAKEREQ
;
1243 I915_WRITE(VLV_GTLC_WAKE_CTRL
, val
);
1244 POSTING_READ(VLV_GTLC_WAKE_CTRL
);
1246 #define COND (!!(I915_READ(VLV_GTLC_PW_STATUS) & VLV_GTLC_ALLOWWAKEACK) == \
1248 err
= wait_for(COND
, 1);
1250 DRM_ERROR("timeout disabling GT waking\n");
1255 static int vlv_wait_for_gt_wells(struct drm_i915_private
*dev_priv
,
1262 mask
= VLV_GTLC_PW_MEDIA_STATUS_MASK
| VLV_GTLC_PW_RENDER_STATUS_MASK
;
1263 val
= wait_for_on
? mask
: 0;
1264 #define COND ((I915_READ(VLV_GTLC_PW_STATUS) & mask) == val)
1268 DRM_DEBUG_KMS("waiting for GT wells to go %s (%08x)\n",
1269 wait_for_on
? "on" : "off",
1270 I915_READ(VLV_GTLC_PW_STATUS
));
1273 * RC6 transitioning can be delayed up to 2 msec (see
1274 * valleyview_enable_rps), use 3 msec for safety.
1276 err
= wait_for(COND
, 3);
1278 DRM_ERROR("timeout waiting for GT wells to go %s\n",
1279 wait_for_on
? "on" : "off");
1285 static void vlv_check_no_gt_access(struct drm_i915_private
*dev_priv
)
1287 if (!(I915_READ(VLV_GTLC_PW_STATUS
) & VLV_GTLC_ALLOWWAKEERR
))
1290 DRM_ERROR("GT register access while GT waking disabled\n");
1291 I915_WRITE(VLV_GTLC_PW_STATUS
, VLV_GTLC_ALLOWWAKEERR
);
1294 static int vlv_runtime_suspend(struct drm_i915_private
*dev_priv
)
1300 * Bspec defines the following GT well on flags as debug only, so
1301 * don't treat them as hard failures.
1303 (void)vlv_wait_for_gt_wells(dev_priv
, false);
1305 mask
= VLV_GTLC_RENDER_CTX_EXISTS
| VLV_GTLC_MEDIA_CTX_EXISTS
;
1306 WARN_ON((I915_READ(VLV_GTLC_WAKE_CTRL
) & mask
) != mask
);
1308 vlv_check_no_gt_access(dev_priv
);
1310 err
= vlv_force_gfx_clock(dev_priv
, true);
1314 err
= vlv_allow_gt_wake(dev_priv
, false);
1317 vlv_save_gunit_s0ix_state(dev_priv
);
1319 err
= vlv_force_gfx_clock(dev_priv
, false);
1326 /* For safety always re-enable waking and disable gfx clock forcing */
1327 vlv_allow_gt_wake(dev_priv
, true);
1329 vlv_force_gfx_clock(dev_priv
, false);
1334 static int vlv_runtime_resume(struct drm_i915_private
*dev_priv
)
1336 struct drm_device
*dev
= dev_priv
->dev
;
1341 * If any of the steps fail just try to continue, that's the best we
1342 * can do at this point. Return the first error code (which will also
1343 * leave RPM permanently disabled).
1345 ret
= vlv_force_gfx_clock(dev_priv
, true);
1347 vlv_restore_gunit_s0ix_state(dev_priv
);
1349 err
= vlv_allow_gt_wake(dev_priv
, true);
1353 err
= vlv_force_gfx_clock(dev_priv
, false);
1357 vlv_check_no_gt_access(dev_priv
);
1359 intel_init_clock_gating(dev
);
1360 i915_gem_restore_fences(dev
);
1365 static int intel_runtime_suspend(struct device
*device
)
1367 struct pci_dev
*pdev
= to_pci_dev(device
);
1368 struct drm_device
*dev
= pci_get_drvdata(pdev
);
1369 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1372 if (WARN_ON_ONCE(!(dev_priv
->rps
.enabled
&& intel_enable_rc6(dev
))))
1375 WARN_ON(!HAS_RUNTIME_PM(dev
));
1376 assert_force_wake_inactive(dev_priv
);
1378 DRM_DEBUG_KMS("Suspending device\n");
1381 * We could deadlock here in case another thread holding struct_mutex
1382 * calls RPM suspend concurrently, since the RPM suspend will wait
1383 * first for this RPM suspend to finish. In this case the concurrent
1384 * RPM resume will be followed by its RPM suspend counterpart. Still
1385 * for consistency return -EAGAIN, which will reschedule this suspend.
1387 if (!mutex_trylock(&dev
->struct_mutex
)) {
1388 DRM_DEBUG_KMS("device lock contention, deffering suspend\n");
1390 * Bump the expiration timestamp, otherwise the suspend won't
1393 pm_runtime_mark_last_busy(device
);
1398 * We are safe here against re-faults, since the fault handler takes
1401 i915_gem_release_all_mmaps(dev_priv
);
1402 mutex_unlock(&dev
->struct_mutex
);
1405 * rps.work can't be rearmed here, since we get here only after making
1406 * sure the GPU is idle and the RPS freq is set to the minimum. See
1407 * intel_mark_idle().
1409 cancel_work_sync(&dev_priv
->rps
.work
);
1410 intel_runtime_pm_disable_interrupts(dev
);
1414 } else if (IS_HASWELL(dev
) || IS_BROADWELL(dev
)) {
1415 ret
= hsw_runtime_suspend(dev_priv
);
1416 } else if (IS_VALLEYVIEW(dev
)) {
1417 ret
= vlv_runtime_suspend(dev_priv
);
1424 DRM_ERROR("Runtime suspend failed, disabling it (%d)\n", ret
);
1425 intel_runtime_pm_restore_interrupts(dev
);
1430 del_timer_sync(&dev_priv
->gpu_error
.hangcheck_timer
);
1431 dev_priv
->pm
.suspended
= true;
1434 * current versions of firmware which depend on this opregion
1435 * notification have repurposed the D1 definition to mean
1436 * "runtime suspended" vs. what you would normally expect (D3)
1437 * to distinguish it from notifications that might be sent
1438 * via the suspend path.
1440 intel_opregion_notify_adapter(dev
, PCI_D1
);
1442 DRM_DEBUG_KMS("Device suspended\n");
1446 static int intel_runtime_resume(struct device
*device
)
1448 struct pci_dev
*pdev
= to_pci_dev(device
);
1449 struct drm_device
*dev
= pci_get_drvdata(pdev
);
1450 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1453 WARN_ON(!HAS_RUNTIME_PM(dev
));
1455 DRM_DEBUG_KMS("Resuming device\n");
1457 intel_opregion_notify_adapter(dev
, PCI_D0
);
1458 dev_priv
->pm
.suspended
= false;
1461 ret
= snb_runtime_resume(dev_priv
);
1462 } else if (IS_HASWELL(dev
) || IS_BROADWELL(dev
)) {
1463 ret
= hsw_runtime_resume(dev_priv
);
1464 } else if (IS_VALLEYVIEW(dev
)) {
1465 ret
= vlv_runtime_resume(dev_priv
);
1472 * No point of rolling back things in case of an error, as the best
1473 * we can do is to hope that things will still work (and disable RPM).
1475 i915_gem_init_swizzling(dev
);
1476 gen6_update_ring_freq(dev
);
1478 intel_runtime_pm_restore_interrupts(dev
);
1479 intel_reset_gt_powersave(dev
);
1482 DRM_ERROR("Runtime resume failed, disabling it (%d)\n", ret
);
1484 DRM_DEBUG_KMS("Device resumed\n");
1489 static const struct dev_pm_ops i915_pm_ops
= {
1490 .suspend
= i915_pm_suspend
,
1491 .suspend_late
= i915_pm_suspend_late
,
1492 .resume_early
= i915_pm_resume_early
,
1493 .resume
= i915_pm_resume
,
1494 .freeze
= i915_pm_freeze
,
1495 .thaw_early
= i915_pm_thaw_early
,
1496 .thaw
= i915_pm_thaw
,
1497 .poweroff
= i915_pm_poweroff
,
1498 .restore_early
= i915_pm_resume_early
,
1499 .restore
= i915_pm_resume
,
1500 .runtime_suspend
= intel_runtime_suspend
,
1501 .runtime_resume
= intel_runtime_resume
,
1504 static const struct vm_operations_struct i915_gem_vm_ops
= {
1505 .fault
= i915_gem_fault
,
1506 .open
= drm_gem_vm_open
,
1507 .close
= drm_gem_vm_close
,
1510 static const struct file_operations i915_driver_fops
= {
1511 .owner
= THIS_MODULE
,
1513 .release
= drm_release
,
1514 .unlocked_ioctl
= drm_ioctl
,
1515 .mmap
= drm_gem_mmap
,
1518 #ifdef CONFIG_COMPAT
1519 .compat_ioctl
= i915_compat_ioctl
,
1521 .llseek
= noop_llseek
,
1524 static struct drm_driver driver
= {
1525 /* Don't use MTRRs here; the Xserver or userspace app should
1526 * deal with them for Intel hardware.
1530 DRIVER_HAVE_IRQ
| DRIVER_IRQ_SHARED
| DRIVER_GEM
| DRIVER_PRIME
|
1532 .load
= i915_driver_load
,
1533 .unload
= i915_driver_unload
,
1534 .open
= i915_driver_open
,
1535 .lastclose
= i915_driver_lastclose
,
1536 .preclose
= i915_driver_preclose
,
1537 .postclose
= i915_driver_postclose
,
1539 /* Used in place of i915_pm_ops for non-DRIVER_MODESET */
1540 .suspend
= i915_suspend
,
1541 .resume
= i915_resume_legacy
,
1543 .device_is_agp
= i915_driver_device_is_agp
,
1544 .master_create
= i915_master_create
,
1545 .master_destroy
= i915_master_destroy
,
1546 #if defined(CONFIG_DEBUG_FS)
1547 .debugfs_init
= i915_debugfs_init
,
1548 .debugfs_cleanup
= i915_debugfs_cleanup
,
1550 .gem_free_object
= i915_gem_free_object
,
1551 .gem_vm_ops
= &i915_gem_vm_ops
,
1553 .prime_handle_to_fd
= drm_gem_prime_handle_to_fd
,
1554 .prime_fd_to_handle
= drm_gem_prime_fd_to_handle
,
1555 .gem_prime_export
= i915_gem_prime_export
,
1556 .gem_prime_import
= i915_gem_prime_import
,
1558 .dumb_create
= i915_gem_dumb_create
,
1559 .dumb_map_offset
= i915_gem_mmap_gtt
,
1560 .dumb_destroy
= drm_gem_dumb_destroy
,
1561 .ioctls
= i915_ioctls
,
1562 .fops
= &i915_driver_fops
,
1563 .name
= DRIVER_NAME
,
1564 .desc
= DRIVER_DESC
,
1565 .date
= DRIVER_DATE
,
1566 .major
= DRIVER_MAJOR
,
1567 .minor
= DRIVER_MINOR
,
1568 .patchlevel
= DRIVER_PATCHLEVEL
,
1571 static struct pci_driver i915_pci_driver
= {
1572 .name
= DRIVER_NAME
,
1573 .id_table
= pciidlist
,
1574 .probe
= i915_pci_probe
,
1575 .remove
= i915_pci_remove
,
1576 .driver
.pm
= &i915_pm_ops
,
1579 static int __init
i915_init(void)
1581 driver
.num_ioctls
= i915_max_ioctl
;
1584 * If CONFIG_DRM_I915_KMS is set, default to KMS unless
1585 * explicitly disabled with the module pararmeter.
1587 * Otherwise, just follow the parameter (defaulting to off).
1589 * Allow optional vga_text_mode_force boot option to override
1590 * the default behavior.
1592 #if defined(CONFIG_DRM_I915_KMS)
1593 if (i915
.modeset
!= 0)
1594 driver
.driver_features
|= DRIVER_MODESET
;
1596 if (i915
.modeset
== 1)
1597 driver
.driver_features
|= DRIVER_MODESET
;
1599 #ifdef CONFIG_VGA_CONSOLE
1600 if (vgacon_text_force() && i915
.modeset
== -1)
1601 driver
.driver_features
&= ~DRIVER_MODESET
;
1604 if (!(driver
.driver_features
& DRIVER_MODESET
)) {
1605 driver
.get_vblank_timestamp
= NULL
;
1606 #ifndef CONFIG_DRM_I915_UMS
1607 /* Silently fail loading to not upset userspace. */
1608 DRM_DEBUG_DRIVER("KMS and UMS disabled.\n");
1613 return drm_pci_init(&driver
, &i915_pci_driver
);
1616 static void __exit
i915_exit(void)
1618 #ifndef CONFIG_DRM_I915_UMS
1619 if (!(driver
.driver_features
& DRIVER_MODESET
))
1620 return; /* Never loaded a driver. */
1623 drm_pci_exit(&driver
, &i915_pci_driver
);
1626 module_init(i915_init
);
1627 module_exit(i915_exit
);
1629 MODULE_AUTHOR(DRIVER_AUTHOR
);
1630 MODULE_DESCRIPTION(DRIVER_DESC
);
1631 MODULE_LICENSE("GPL and additional rights");