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 = {
349 .gen = 8, .num_pipes = 3,
350 .need_gfx_hws = 1, .has_hotplug = 1,
351 .ring_mask = RENDER_RING | BSD_RING | BLT_RING | VEBOX_RING,
353 .display_mmio_offset = VLV_DISPLAY_BASE,
358 static const struct intel_device_info intel_skylake_info = {
361 .gen = 9, .num_pipes = 3,
362 .need_gfx_hws = 1, .has_hotplug = 1,
363 .ring_mask = RENDER_RING | BSD_RING | BLT_RING | VEBOX_RING,
367 GEN_DEFAULT_PIPEOFFSETS,
371 static const struct intel_device_info intel_skylake_gt3_info = {
374 .gen = 9, .num_pipes = 3,
375 .need_gfx_hws = 1, .has_hotplug = 1,
376 .ring_mask = RENDER_RING | BSD_RING | BLT_RING | VEBOX_RING | BSD2_RING,
380 GEN_DEFAULT_PIPEOFFSETS,
384 static const struct intel_device_info intel_broxton_info = {
387 .need_gfx_hws = 1, .has_hotplug = 1,
388 .ring_mask = RENDER_RING | BSD_RING | BLT_RING | VEBOX_RING,
392 GEN_DEFAULT_PIPEOFFSETS,
397 * Make sure any device matches here are from most specific to most
398 * general. For example, since the Quanta match is based on the subsystem
399 * and subvendor IDs, we need it to come before the more general IVB
400 * PCI ID matches, otherwise we'll use the wrong info struct above.
402 #define INTEL_PCI_IDS \
403 INTEL_I830_IDS(&intel_i830_info), \
404 INTEL_I845G_IDS(&intel_845g_info), \
405 INTEL_I85X_IDS(&intel_i85x_info), \
406 INTEL_I865G_IDS(&intel_i865g_info), \
407 INTEL_I915G_IDS(&intel_i915g_info), \
408 INTEL_I915GM_IDS(&intel_i915gm_info), \
409 INTEL_I945G_IDS(&intel_i945g_info), \
410 INTEL_I945GM_IDS(&intel_i945gm_info), \
411 INTEL_I965G_IDS(&intel_i965g_info), \
412 INTEL_G33_IDS(&intel_g33_info), \
413 INTEL_I965GM_IDS(&intel_i965gm_info), \
414 INTEL_GM45_IDS(&intel_gm45_info), \
415 INTEL_G45_IDS(&intel_g45_info), \
416 INTEL_PINEVIEW_IDS(&intel_pineview_info), \
417 INTEL_IRONLAKE_D_IDS(&intel_ironlake_d_info), \
418 INTEL_IRONLAKE_M_IDS(&intel_ironlake_m_info), \
419 INTEL_SNB_D_IDS(&intel_sandybridge_d_info), \
420 INTEL_SNB_M_IDS(&intel_sandybridge_m_info), \
421 INTEL_IVB_Q_IDS(&intel_ivybridge_q_info), /* must be first IVB */ \
422 INTEL_IVB_M_IDS(&intel_ivybridge_m_info), \
423 INTEL_IVB_D_IDS(&intel_ivybridge_d_info), \
424 INTEL_HSW_D_IDS(&intel_haswell_d_info), \
425 INTEL_HSW_M_IDS(&intel_haswell_m_info), \
426 INTEL_VLV_M_IDS(&intel_valleyview_m_info), \
427 INTEL_VLV_D_IDS(&intel_valleyview_d_info), \
428 INTEL_BDW_GT12M_IDS(&intel_broadwell_m_info), \
429 INTEL_BDW_GT12D_IDS(&intel_broadwell_d_info), \
430 INTEL_BDW_GT3M_IDS(&intel_broadwell_gt3m_info), \
431 INTEL_BDW_GT3D_IDS(&intel_broadwell_gt3d_info), \
432 INTEL_CHV_IDS(&intel_cherryview_info), \
433 INTEL_SKL_GT1_IDS(&intel_skylake_info), \
434 INTEL_SKL_GT2_IDS(&intel_skylake_info), \
435 INTEL_SKL_GT3_IDS(&intel_skylake_gt3_info), \
436 INTEL_BXT_IDS(&intel_broxton_info)
438 static const struct pci_device_id pciidlist[] = { /* aka */
443 MODULE_DEVICE_TABLE(pci, pciidlist);
445 void intel_detect_pch(struct drm_device *dev)
447 struct drm_i915_private *dev_priv = dev->dev_private;
448 struct pci_dev *pch = NULL;
450 /* In all current cases, num_pipes is equivalent to the PCH_NOP setting
451 * (which really amounts to a PCH but no South Display).
453 if (INTEL_INFO(dev)->num_pipes == 0) {
454 dev_priv->pch_type = PCH_NOP;
459 * The reason to probe ISA bridge instead of Dev31:Fun0 is to
460 * make graphics device passthrough work easy for VMM, that only
461 * need to expose ISA bridge to let driver know the real hardware
462 * underneath. This is a requirement from virtualization team.
464 * In some virtualized environments (e.g. XEN), there is irrelevant
465 * ISA bridge in the system. To work reliably, we should scan trhough
466 * all the ISA bridge devices and check for the first match, instead
467 * of only checking the first one.
469 while ((pch = pci_get_class(PCI_CLASS_BRIDGE_ISA << 8, pch))) {
470 if (pch->vendor == PCI_VENDOR_ID_INTEL) {
471 unsigned short id = pch->device & INTEL_PCH_DEVICE_ID_MASK;
472 dev_priv->pch_id = id;
474 if (id == INTEL_PCH_IBX_DEVICE_ID_TYPE) {
475 dev_priv->pch_type = PCH_IBX;
476 DRM_DEBUG_KMS("Found Ibex Peak PCH\n");
477 WARN_ON(!IS_GEN5(dev));
478 } else if (id == INTEL_PCH_CPT_DEVICE_ID_TYPE) {
479 dev_priv->pch_type = PCH_CPT;
480 DRM_DEBUG_KMS("Found CougarPoint PCH\n");
481 WARN_ON(!(IS_GEN6(dev) || IS_IVYBRIDGE(dev)));
482 } else if (id == INTEL_PCH_PPT_DEVICE_ID_TYPE) {
483 /* PantherPoint is CPT compatible */
484 dev_priv->pch_type = PCH_CPT;
485 DRM_DEBUG_KMS("Found PantherPoint PCH\n");
486 WARN_ON(!(IS_GEN6(dev) || IS_IVYBRIDGE(dev)));
487 } else if (id == INTEL_PCH_LPT_DEVICE_ID_TYPE) {
488 dev_priv->pch_type = PCH_LPT;
489 DRM_DEBUG_KMS("Found LynxPoint PCH\n");
490 WARN_ON(!IS_HASWELL(dev) && !IS_BROADWELL(dev));
491 WARN_ON(IS_HSW_ULT(dev) || IS_BDW_ULT(dev));
492 } else if (id == INTEL_PCH_LPT_LP_DEVICE_ID_TYPE) {
493 dev_priv->pch_type = PCH_LPT;
494 DRM_DEBUG_KMS("Found LynxPoint LP PCH\n");
495 WARN_ON(!IS_HASWELL(dev) && !IS_BROADWELL(dev));
496 WARN_ON(!IS_HSW_ULT(dev) && !IS_BDW_ULT(dev));
497 } else if (id == INTEL_PCH_SPT_DEVICE_ID_TYPE) {
498 dev_priv->pch_type = PCH_SPT;
499 DRM_DEBUG_KMS("Found SunrisePoint PCH\n");
500 WARN_ON(!IS_SKYLAKE(dev));
501 } else if (id == INTEL_PCH_SPT_LP_DEVICE_ID_TYPE) {
502 dev_priv->pch_type = PCH_SPT;
503 DRM_DEBUG_KMS("Found SunrisePoint LP PCH\n");
504 WARN_ON(!IS_SKYLAKE(dev));
512 DRM_DEBUG_KMS("No PCH found.\n");
517 bool i915_semaphore_is_enabled(struct drm_device *dev)
519 if (INTEL_INFO(dev)->gen < 6)
522 if (i915.semaphores >= 0)
523 return i915.semaphores;
525 /* TODO: make semaphores and Execlists play nicely together */
526 if (i915.enable_execlists)
529 /* Until we get further testing... */
533 #ifdef CONFIG_INTEL_IOMMU
534 /* Enable semaphores on SNB when IO remapping is off */
535 if (INTEL_INFO(dev)->gen == 6 && intel_iommu_gfx_mapped)
542 void i915_firmware_load_error_print(const char *fw_path, int err)
544 DRM_ERROR("failed to load firmware %s (%d)\n", fw_path, err);
547 * If the reason is not known assume -ENOENT since that's the most
548 * usual failure mode.
553 if (!(IS_BUILTIN(CONFIG_DRM_I915) && err == -ENOENT))
557 "The driver is built-in, so to load the firmware you need to\n"
558 "include it either in the kernel (see CONFIG_EXTRA_FIRMWARE) or\n"
559 "in your initrd/initramfs image.\n");
562 static void intel_suspend_encoders(struct drm_i915_private *dev_priv)
564 struct drm_device *dev = dev_priv->dev;
565 struct drm_encoder *encoder;
567 drm_modeset_lock_all(dev);
568 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
569 struct intel_encoder *intel_encoder = to_intel_encoder(encoder);
571 if (intel_encoder->suspend)
572 intel_encoder->suspend(intel_encoder);
574 drm_modeset_unlock_all(dev);
577 static int intel_suspend_complete(struct drm_i915_private *dev_priv);
578 static int vlv_resume_prepare(struct drm_i915_private *dev_priv,
580 static int skl_resume_prepare(struct drm_i915_private *dev_priv);
581 static int bxt_resume_prepare(struct drm_i915_private *dev_priv);
584 static int i915_drm_suspend(struct drm_device *dev)
586 struct drm_i915_private *dev_priv = dev->dev_private;
587 pci_power_t opregion_target_state;
590 /* ignore lid events during suspend */
591 mutex_lock(&dev_priv->modeset_restore_lock);
592 dev_priv->modeset_restore = MODESET_SUSPENDED;
593 mutex_unlock(&dev_priv->modeset_restore_lock);
595 /* We do a lot of poking in a lot of registers, make sure they work
597 intel_display_set_init_power(dev_priv, true);
599 drm_kms_helper_poll_disable(dev);
601 pci_save_state(dev->pdev);
603 error = i915_gem_suspend(dev);
605 dev_err(&dev->pdev->dev,
606 "GEM idle failed, resume might fail\n");
610 intel_suspend_gt_powersave(dev);
613 * Disable CRTCs directly since we want to preserve sw state
614 * for _thaw. Also, power gate the CRTC power wells.
616 drm_modeset_lock_all(dev);
617 intel_display_suspend(dev);
618 drm_modeset_unlock_all(dev);
620 intel_dp_mst_suspend(dev);
622 intel_runtime_pm_disable_interrupts(dev_priv);
623 intel_hpd_cancel_work(dev_priv);
625 intel_suspend_encoders(dev_priv);
627 intel_suspend_hw(dev);
629 i915_gem_suspend_gtt_mappings(dev);
631 i915_save_state(dev);
633 opregion_target_state = PCI_D3cold;
634 #if IS_ENABLED(CONFIG_ACPI_SLEEP)
635 if (acpi_target_system_state() < ACPI_STATE_S3)
636 opregion_target_state = PCI_D1;
638 intel_opregion_notify_adapter(dev, opregion_target_state);
640 intel_uncore_forcewake_reset(dev, false);
641 intel_opregion_fini(dev);
643 intel_fbdev_set_suspend(dev, FBINFO_STATE_SUSPENDED, true);
645 dev_priv->suspend_count++;
647 intel_display_set_init_power(dev_priv, false);
652 static int i915_drm_suspend_late(struct drm_device *drm_dev, bool hibernation)
654 struct drm_i915_private *dev_priv = drm_dev->dev_private;
657 ret = intel_suspend_complete(dev_priv);
660 DRM_ERROR("Suspend complete failed: %d\n", ret);
665 pci_disable_device(drm_dev->pdev);
667 * During hibernation on some GEN4 platforms the BIOS may try to access
668 * the device even though it's already in D3 and hang the machine. So
669 * leave the device in D0 on those platforms and hope the BIOS will
670 * power down the device properly. Platforms where this was seen:
671 * Lenovo Thinkpad X301, X61s
674 drm_dev->pdev->subsystem_vendor == PCI_VENDOR_ID_LENOVO &&
675 INTEL_INFO(dev_priv)->gen == 4))
676 pci_set_power_state(drm_dev->pdev, PCI_D3hot);
681 int i915_suspend_legacy(struct drm_device *dev, pm_message_t state)
685 if (!dev || !dev->dev_private) {
686 DRM_ERROR("dev: %p\n", dev);
687 DRM_ERROR("DRM not initialized, aborting suspend.\n");
691 if (WARN_ON_ONCE(state.event != PM_EVENT_SUSPEND &&
692 state.event != PM_EVENT_FREEZE))
695 if (dev->switch_power_state == DRM_SWITCH_POWER_OFF)
698 error = i915_drm_suspend(dev);
702 return i915_drm_suspend_late(dev, false);
705 static int i915_drm_resume(struct drm_device *dev)
707 struct drm_i915_private *dev_priv = dev->dev_private;
709 mutex_lock(&dev->struct_mutex);
710 i915_gem_restore_gtt_mappings(dev);
711 mutex_unlock(&dev->struct_mutex);
713 i915_restore_state(dev);
714 intel_opregion_setup(dev);
716 intel_init_pch_refclk(dev);
717 drm_mode_config_reset(dev);
720 * Interrupts have to be enabled before any batches are run. If not the
721 * GPU will hang. i915_gem_init_hw() will initiate batches to
722 * update/restore the context.
724 * Modeset enabling in intel_modeset_init_hw() also needs working
727 intel_runtime_pm_enable_interrupts(dev_priv);
729 mutex_lock(&dev->struct_mutex);
730 if (i915_gem_init_hw(dev)) {
731 DRM_ERROR("failed to re-initialize GPU, declaring wedged!\n");
732 atomic_set_mask(I915_WEDGED, &dev_priv->gpu_error.reset_counter);
734 mutex_unlock(&dev->struct_mutex);
736 intel_modeset_init_hw(dev);
738 spin_lock_irq(&dev_priv->irq_lock);
739 if (dev_priv->display.hpd_irq_setup)
740 dev_priv->display.hpd_irq_setup(dev);
741 spin_unlock_irq(&dev_priv->irq_lock);
743 drm_modeset_lock_all(dev);
744 intel_display_resume(dev);
745 drm_modeset_unlock_all(dev);
747 intel_dp_mst_resume(dev);
750 * ... but also need to make sure that hotplug processing
751 * doesn't cause havoc. Like in the driver load code we don't
752 * bother with the tiny race here where we might loose hotplug
755 intel_hpd_init(dev_priv);
756 /* Config may have changed between suspend and resume */
757 drm_helper_hpd_irq_event(dev);
759 intel_opregion_init(dev);
761 intel_fbdev_set_suspend(dev, FBINFO_STATE_RUNNING, false);
763 mutex_lock(&dev_priv->modeset_restore_lock);
764 dev_priv->modeset_restore = MODESET_DONE;
765 mutex_unlock(&dev_priv->modeset_restore_lock);
767 intel_opregion_notify_adapter(dev, PCI_D0);
769 drm_kms_helper_poll_enable(dev);
774 static int i915_drm_resume_early(struct drm_device *dev)
776 struct drm_i915_private *dev_priv = dev->dev_private;
780 * We have a resume ordering issue with the snd-hda driver also
781 * requiring our device to be power up. Due to the lack of a
782 * parent/child relationship we currently solve this with an early
785 * FIXME: This should be solved with a special hdmi sink device or
786 * similar so that power domains can be employed.
788 if (pci_enable_device(dev->pdev))
791 pci_set_master(dev->pdev);
793 if (IS_VALLEYVIEW(dev_priv))
794 ret = vlv_resume_prepare(dev_priv, false);
796 DRM_ERROR("Resume prepare failed: %d, continuing anyway\n",
799 intel_uncore_early_sanitize(dev, true);
802 ret = bxt_resume_prepare(dev_priv);
803 else if (IS_SKYLAKE(dev_priv))
804 ret = skl_resume_prepare(dev_priv);
805 else if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv))
806 hsw_disable_pc8(dev_priv);
808 intel_uncore_sanitize(dev);
809 intel_power_domains_init_hw(dev_priv);
814 int i915_resume_legacy(struct drm_device *dev)
818 if (dev->switch_power_state == DRM_SWITCH_POWER_OFF)
821 ret = i915_drm_resume_early(dev);
825 return i915_drm_resume(dev);
829 * i915_reset - reset chip after a hang
830 * @dev: drm device to reset
832 * Reset the chip. Useful if a hang is detected. Returns zero on successful
833 * reset or otherwise an error code.
835 * Procedure is fairly simple:
836 * - reset the chip using the reset reg
837 * - re-init context state
838 * - re-init hardware status page
839 * - re-init ring buffer
840 * - re-init interrupt state
843 int i915_reset(struct drm_device *dev)
845 struct drm_i915_private *dev_priv = dev->dev_private;
849 intel_reset_gt_powersave(dev);
851 mutex_lock(&dev->struct_mutex);
855 simulated = dev_priv->gpu_error.stop_rings != 0;
857 ret = intel_gpu_reset(dev);
859 /* Also reset the gpu hangman. */
861 DRM_INFO("Simulated gpu hang, resetting stop_rings\n");
862 dev_priv->gpu_error.stop_rings = 0;
863 if (ret == -ENODEV) {
864 DRM_INFO("Reset not implemented, but ignoring "
865 "error for simulated gpu hangs\n");
870 if (i915_stop_ring_allow_warn(dev_priv))
871 pr_notice("drm/i915: Resetting chip after gpu hang\n");
874 DRM_ERROR("Failed to reset chip: %i\n", ret);
875 mutex_unlock(&dev->struct_mutex);
879 intel_overlay_reset(dev_priv);
881 /* Ok, now get things going again... */
884 * Everything depends on having the GTT running, so we need to start
885 * there. Fortunately we don't need to do this unless we reset the
886 * chip at a PCI level.
888 * Next we need to restore the context, but we don't use those
891 * Ring buffer needs to be re-initialized in the KMS case, or if X
892 * was running at the time of the reset (i.e. we weren't VT
896 /* Used to prevent gem_check_wedged returning -EAGAIN during gpu reset */
897 dev_priv->gpu_error.reload_in_reset = true;
899 ret = i915_gem_init_hw(dev);
901 dev_priv->gpu_error.reload_in_reset = false;
903 mutex_unlock(&dev->struct_mutex);
905 DRM_ERROR("Failed hw init on reset %d\n", ret);
910 * rps/rc6 re-init is necessary to restore state lost after the
911 * reset and the re-install of gt irqs. Skip for ironlake per
912 * previous concerns that it doesn't respond well to some forms
913 * of re-init after reset.
915 if (INTEL_INFO(dev)->gen > 5)
916 intel_enable_gt_powersave(dev);
921 static int i915_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
923 struct intel_device_info *intel_info =
924 (struct intel_device_info *) ent->driver_data;
926 if (IS_PRELIMINARY_HW(intel_info) && !i915.preliminary_hw_support) {
927 DRM_INFO("This hardware requires preliminary hardware support.\n"
928 "See CONFIG_DRM_I915_PRELIMINARY_HW_SUPPORT, and/or modparam preliminary_hw_support\n");
932 /* Only bind to function 0 of the device. Early generations
933 * used function 1 as a placeholder for multi-head. This causes
934 * us confusion instead, especially on the systems where both
935 * functions have the same PCI-ID!
937 if (PCI_FUNC(pdev->devfn))
940 driver.driver_features &= ~(DRIVER_USE_AGP);
942 return drm_get_pci_dev(pdev, ent, &driver);
946 i915_pci_remove(struct pci_dev *pdev)
948 struct drm_device *dev = pci_get_drvdata(pdev);
953 static int i915_pm_suspend(struct device *dev)
955 struct pci_dev *pdev = to_pci_dev(dev);
956 struct drm_device *drm_dev = pci_get_drvdata(pdev);
958 if (!drm_dev || !drm_dev->dev_private) {
959 dev_err(dev, "DRM not initialized, aborting suspend.\n");
963 if (drm_dev->switch_power_state == DRM_SWITCH_POWER_OFF)
966 return i915_drm_suspend(drm_dev);
969 static int i915_pm_suspend_late(struct device *dev)
971 struct drm_device *drm_dev = dev_to_i915(dev)->dev;
974 * We have a suspend ordering issue with the snd-hda driver also
975 * requiring our device to be power up. Due to the lack of a
976 * parent/child relationship we currently solve this with an late
979 * FIXME: This should be solved with a special hdmi sink device or
980 * similar so that power domains can be employed.
982 if (drm_dev->switch_power_state == DRM_SWITCH_POWER_OFF)
985 return i915_drm_suspend_late(drm_dev, false);
988 static int i915_pm_poweroff_late(struct device *dev)
990 struct drm_device *drm_dev = dev_to_i915(dev)->dev;
992 if (drm_dev->switch_power_state == DRM_SWITCH_POWER_OFF)
995 return i915_drm_suspend_late(drm_dev, true);
998 static int i915_pm_resume_early(struct device *dev)
1000 struct drm_device *drm_dev = dev_to_i915(dev)->dev;
1002 if (drm_dev->switch_power_state == DRM_SWITCH_POWER_OFF)
1005 return i915_drm_resume_early(drm_dev);
1008 static int i915_pm_resume(struct device *dev)
1010 struct drm_device *drm_dev = dev_to_i915(dev)->dev;
1012 if (drm_dev->switch_power_state == DRM_SWITCH_POWER_OFF)
1015 return i915_drm_resume(drm_dev);
1018 static int skl_suspend_complete(struct drm_i915_private *dev_priv)
1020 /* Enabling DC6 is not a hard requirement to enter runtime D3 */
1023 * This is to ensure that CSR isn't identified as loaded before
1024 * CSR-loading program is called during runtime-resume.
1026 intel_csr_load_status_set(dev_priv, FW_UNINITIALIZED);
1028 skl_uninit_cdclk(dev_priv);
1033 static int hsw_suspend_complete(struct drm_i915_private *dev_priv)
1035 hsw_enable_pc8(dev_priv);
1040 static int bxt_suspend_complete(struct drm_i915_private *dev_priv)
1042 struct drm_device *dev = dev_priv->dev;
1044 /* TODO: when DC5 support is added disable DC5 here. */
1046 broxton_ddi_phy_uninit(dev);
1047 broxton_uninit_cdclk(dev);
1048 bxt_enable_dc9(dev_priv);
1053 static int bxt_resume_prepare(struct drm_i915_private *dev_priv)
1055 struct drm_device *dev = dev_priv->dev;
1057 /* TODO: when CSR FW support is added make sure the FW is loaded */
1059 bxt_disable_dc9(dev_priv);
1062 * TODO: when DC5 support is added enable DC5 here if the CSR FW
1065 broxton_init_cdclk(dev);
1066 broxton_ddi_phy_init(dev);
1067 intel_prepare_ddi(dev);
1072 static int skl_resume_prepare(struct drm_i915_private *dev_priv)
1074 struct drm_device *dev = dev_priv->dev;
1076 skl_init_cdclk(dev_priv);
1077 intel_csr_load_program(dev);
1083 * Save all Gunit registers that may be lost after a D3 and a subsequent
1084 * S0i[R123] transition. The list of registers needing a save/restore is
1085 * defined in the VLV2_S0IXRegs document. This documents marks all Gunit
1086 * registers in the following way:
1087 * - Driver: saved/restored by the driver
1088 * - Punit : saved/restored by the Punit firmware
1089 * - No, w/o marking: no need to save/restore, since the register is R/O or
1090 * used internally by the HW in a way that doesn't depend
1091 * keeping the content across a suspend/resume.
1092 * - Debug : used for debugging
1094 * We save/restore all registers marked with 'Driver', with the following
1096 * - Registers out of use, including also registers marked with 'Debug'.
1097 * These have no effect on the driver's operation, so we don't save/restore
1098 * them to reduce the overhead.
1099 * - Registers that are fully setup by an initialization function called from
1100 * the resume path. For example many clock gating and RPS/RC6 registers.
1101 * - Registers that provide the right functionality with their reset defaults.
1103 * TODO: Except for registers that based on the above 3 criteria can be safely
1104 * ignored, we save/restore all others, practically treating the HW context as
1105 * a black-box for the driver. Further investigation is needed to reduce the
1106 * saved/restored registers even further, by following the same 3 criteria.
1108 static void vlv_save_gunit_s0ix_state(struct drm_i915_private *dev_priv)
1110 struct vlv_s0ix_state *s = &dev_priv->vlv_s0ix_state;
1113 /* GAM 0x4000-0x4770 */
1114 s->wr_watermark = I915_READ(GEN7_WR_WATERMARK);
1115 s->gfx_prio_ctrl = I915_READ(GEN7_GFX_PRIO_CTRL);
1116 s->arb_mode = I915_READ(ARB_MODE);
1117 s->gfx_pend_tlb0 = I915_READ(GEN7_GFX_PEND_TLB0);
1118 s->gfx_pend_tlb1 = I915_READ(GEN7_GFX_PEND_TLB1);
1120 for (i = 0; i < ARRAY_SIZE(s->lra_limits); i++)
1121 s->lra_limits[i] = I915_READ(GEN7_LRA_LIMITS_BASE + i * 4);
1123 s->media_max_req_count = I915_READ(GEN7_MEDIA_MAX_REQ_COUNT);
1124 s->gfx_max_req_count = I915_READ(GEN7_GFX_MAX_REQ_COUNT);
1126 s->render_hwsp = I915_READ(RENDER_HWS_PGA_GEN7);
1127 s->ecochk = I915_READ(GAM_ECOCHK);
1128 s->bsd_hwsp = I915_READ(BSD_HWS_PGA_GEN7);
1129 s->blt_hwsp = I915_READ(BLT_HWS_PGA_GEN7);
1131 s->tlb_rd_addr = I915_READ(GEN7_TLB_RD_ADDR);
1133 /* MBC 0x9024-0x91D0, 0x8500 */
1134 s->g3dctl = I915_READ(VLV_G3DCTL);
1135 s->gsckgctl = I915_READ(VLV_GSCKGCTL);
1136 s->mbctl = I915_READ(GEN6_MBCTL);
1138 /* GCP 0x9400-0x9424, 0x8100-0x810C */
1139 s->ucgctl1 = I915_READ(GEN6_UCGCTL1);
1140 s->ucgctl3 = I915_READ(GEN6_UCGCTL3);
1141 s->rcgctl1 = I915_READ(GEN6_RCGCTL1);
1142 s->rcgctl2 = I915_READ(GEN6_RCGCTL2);
1143 s->rstctl = I915_READ(GEN6_RSTCTL);
1144 s->misccpctl = I915_READ(GEN7_MISCCPCTL);
1146 /* GPM 0xA000-0xAA84, 0x8000-0x80FC */
1147 s->gfxpause = I915_READ(GEN6_GFXPAUSE);
1148 s->rpdeuhwtc = I915_READ(GEN6_RPDEUHWTC);
1149 s->rpdeuc = I915_READ(GEN6_RPDEUC);
1150 s->ecobus = I915_READ(ECOBUS);
1151 s->pwrdwnupctl = I915_READ(VLV_PWRDWNUPCTL);
1152 s->rp_down_timeout = I915_READ(GEN6_RP_DOWN_TIMEOUT);
1153 s->rp_deucsw = I915_READ(GEN6_RPDEUCSW);
1154 s->rcubmabdtmr = I915_READ(GEN6_RCUBMABDTMR);
1155 s->rcedata = I915_READ(VLV_RCEDATA);
1156 s->spare2gh = I915_READ(VLV_SPAREG2H);
1158 /* Display CZ domain, 0x4400C-0x4402C, 0x4F000-0x4F11F */
1159 s->gt_imr = I915_READ(GTIMR);
1160 s->gt_ier = I915_READ(GTIER);
1161 s->pm_imr = I915_READ(GEN6_PMIMR);
1162 s->pm_ier = I915_READ(GEN6_PMIER);
1164 for (i = 0; i < ARRAY_SIZE(s->gt_scratch); i++)
1165 s->gt_scratch[i] = I915_READ(GEN7_GT_SCRATCH_BASE + i * 4);
1167 /* GT SA CZ domain, 0x100000-0x138124 */
1168 s->tilectl = I915_READ(TILECTL);
1169 s->gt_fifoctl = I915_READ(GTFIFOCTL);
1170 s->gtlc_wake_ctrl = I915_READ(VLV_GTLC_WAKE_CTRL);
1171 s->gtlc_survive = I915_READ(VLV_GTLC_SURVIVABILITY_REG);
1172 s->pmwgicz = I915_READ(VLV_PMWGICZ);
1174 /* Gunit-Display CZ domain, 0x182028-0x1821CF */
1175 s->gu_ctl0 = I915_READ(VLV_GU_CTL0);
1176 s->gu_ctl1 = I915_READ(VLV_GU_CTL1);
1177 s->pcbr = I915_READ(VLV_PCBR);
1178 s->clock_gate_dis2 = I915_READ(VLV_GUNIT_CLOCK_GATE2);
1181 * Not saving any of:
1182 * DFT, 0x9800-0x9EC0
1183 * SARB, 0xB000-0xB1FC
1184 * GAC, 0x5208-0x524C, 0x14000-0x14C000
1189 static void vlv_restore_gunit_s0ix_state(struct drm_i915_private *dev_priv)
1191 struct vlv_s0ix_state *s = &dev_priv->vlv_s0ix_state;
1195 /* GAM 0x4000-0x4770 */
1196 I915_WRITE(GEN7_WR_WATERMARK, s->wr_watermark);
1197 I915_WRITE(GEN7_GFX_PRIO_CTRL, s->gfx_prio_ctrl);
1198 I915_WRITE(ARB_MODE, s->arb_mode | (0xffff << 16));
1199 I915_WRITE(GEN7_GFX_PEND_TLB0, s->gfx_pend_tlb0);
1200 I915_WRITE(GEN7_GFX_PEND_TLB1, s->gfx_pend_tlb1);
1202 for (i = 0; i < ARRAY_SIZE(s->lra_limits); i++)
1203 I915_WRITE(GEN7_LRA_LIMITS_BASE + i * 4, s->lra_limits[i]);
1205 I915_WRITE(GEN7_MEDIA_MAX_REQ_COUNT, s->media_max_req_count);
1206 I915_WRITE(GEN7_GFX_MAX_REQ_COUNT, s->gfx_max_req_count);
1208 I915_WRITE(RENDER_HWS_PGA_GEN7, s->render_hwsp);
1209 I915_WRITE(GAM_ECOCHK, s->ecochk);
1210 I915_WRITE(BSD_HWS_PGA_GEN7, s->bsd_hwsp);
1211 I915_WRITE(BLT_HWS_PGA_GEN7, s->blt_hwsp);
1213 I915_WRITE(GEN7_TLB_RD_ADDR, s->tlb_rd_addr);
1215 /* MBC 0x9024-0x91D0, 0x8500 */
1216 I915_WRITE(VLV_G3DCTL, s->g3dctl);
1217 I915_WRITE(VLV_GSCKGCTL, s->gsckgctl);
1218 I915_WRITE(GEN6_MBCTL, s->mbctl);
1220 /* GCP 0x9400-0x9424, 0x8100-0x810C */
1221 I915_WRITE(GEN6_UCGCTL1, s->ucgctl1);
1222 I915_WRITE(GEN6_UCGCTL3, s->ucgctl3);
1223 I915_WRITE(GEN6_RCGCTL1, s->rcgctl1);
1224 I915_WRITE(GEN6_RCGCTL2, s->rcgctl2);
1225 I915_WRITE(GEN6_RSTCTL, s->rstctl);
1226 I915_WRITE(GEN7_MISCCPCTL, s->misccpctl);
1228 /* GPM 0xA000-0xAA84, 0x8000-0x80FC */
1229 I915_WRITE(GEN6_GFXPAUSE, s->gfxpause);
1230 I915_WRITE(GEN6_RPDEUHWTC, s->rpdeuhwtc);
1231 I915_WRITE(GEN6_RPDEUC, s->rpdeuc);
1232 I915_WRITE(ECOBUS, s->ecobus);
1233 I915_WRITE(VLV_PWRDWNUPCTL, s->pwrdwnupctl);
1234 I915_WRITE(GEN6_RP_DOWN_TIMEOUT,s->rp_down_timeout);
1235 I915_WRITE(GEN6_RPDEUCSW, s->rp_deucsw);
1236 I915_WRITE(GEN6_RCUBMABDTMR, s->rcubmabdtmr);
1237 I915_WRITE(VLV_RCEDATA, s->rcedata);
1238 I915_WRITE(VLV_SPAREG2H, s->spare2gh);
1240 /* Display CZ domain, 0x4400C-0x4402C, 0x4F000-0x4F11F */
1241 I915_WRITE(GTIMR, s->gt_imr);
1242 I915_WRITE(GTIER, s->gt_ier);
1243 I915_WRITE(GEN6_PMIMR, s->pm_imr);
1244 I915_WRITE(GEN6_PMIER, s->pm_ier);
1246 for (i = 0; i < ARRAY_SIZE(s->gt_scratch); i++)
1247 I915_WRITE(GEN7_GT_SCRATCH_BASE + i * 4, s->gt_scratch[i]);
1249 /* GT SA CZ domain, 0x100000-0x138124 */
1250 I915_WRITE(TILECTL, s->tilectl);
1251 I915_WRITE(GTFIFOCTL, s->gt_fifoctl);
1253 * Preserve the GT allow wake and GFX force clock bit, they are not
1254 * be restored, as they are used to control the s0ix suspend/resume
1255 * sequence by the caller.
1257 val = I915_READ(VLV_GTLC_WAKE_CTRL);
1258 val &= VLV_GTLC_ALLOWWAKEREQ;
1259 val |= s->gtlc_wake_ctrl & ~VLV_GTLC_ALLOWWAKEREQ;
1260 I915_WRITE(VLV_GTLC_WAKE_CTRL, val);
1262 val = I915_READ(VLV_GTLC_SURVIVABILITY_REG);
1263 val &= VLV_GFX_CLK_FORCE_ON_BIT;
1264 val |= s->gtlc_survive & ~VLV_GFX_CLK_FORCE_ON_BIT;
1265 I915_WRITE(VLV_GTLC_SURVIVABILITY_REG, val);
1267 I915_WRITE(VLV_PMWGICZ, s->pmwgicz);
1269 /* Gunit-Display CZ domain, 0x182028-0x1821CF */
1270 I915_WRITE(VLV_GU_CTL0, s->gu_ctl0);
1271 I915_WRITE(VLV_GU_CTL1, s->gu_ctl1);
1272 I915_WRITE(VLV_PCBR, s->pcbr);
1273 I915_WRITE(VLV_GUNIT_CLOCK_GATE2, s->clock_gate_dis2);
1276 int vlv_force_gfx_clock(struct drm_i915_private *dev_priv, bool force_on)
1281 #define COND (I915_READ(VLV_GTLC_SURVIVABILITY_REG) & VLV_GFX_CLK_STATUS_BIT)
1283 val = I915_READ(VLV_GTLC_SURVIVABILITY_REG);
1284 val &= ~VLV_GFX_CLK_FORCE_ON_BIT;
1286 val |= VLV_GFX_CLK_FORCE_ON_BIT;
1287 I915_WRITE(VLV_GTLC_SURVIVABILITY_REG, val);
1292 err = wait_for(COND, 20);
1294 DRM_ERROR("timeout waiting for GFX clock force-on (%08x)\n",
1295 I915_READ(VLV_GTLC_SURVIVABILITY_REG));
1301 static int vlv_allow_gt_wake(struct drm_i915_private *dev_priv, bool allow)
1306 val = I915_READ(VLV_GTLC_WAKE_CTRL);
1307 val &= ~VLV_GTLC_ALLOWWAKEREQ;
1309 val |= VLV_GTLC_ALLOWWAKEREQ;
1310 I915_WRITE(VLV_GTLC_WAKE_CTRL, val);
1311 POSTING_READ(VLV_GTLC_WAKE_CTRL);
1313 #define COND (!!(I915_READ(VLV_GTLC_PW_STATUS) & VLV_GTLC_ALLOWWAKEACK) == \
1315 err = wait_for(COND, 1);
1317 DRM_ERROR("timeout disabling GT waking\n");
1322 static int vlv_wait_for_gt_wells(struct drm_i915_private *dev_priv,
1329 mask = VLV_GTLC_PW_MEDIA_STATUS_MASK | VLV_GTLC_PW_RENDER_STATUS_MASK;
1330 val = wait_for_on ? mask : 0;
1331 #define COND ((I915_READ(VLV_GTLC_PW_STATUS) & mask) == val)
1335 DRM_DEBUG_KMS("waiting for GT wells to go %s (%08x)\n",
1336 wait_for_on ? "on" : "off",
1337 I915_READ(VLV_GTLC_PW_STATUS));
1340 * RC6 transitioning can be delayed up to 2 msec (see
1341 * valleyview_enable_rps), use 3 msec for safety.
1343 err = wait_for(COND, 3);
1345 DRM_ERROR("timeout waiting for GT wells to go %s\n",
1346 wait_for_on ? "on" : "off");
1352 static void vlv_check_no_gt_access(struct drm_i915_private *dev_priv)
1354 if (!(I915_READ(VLV_GTLC_PW_STATUS) & VLV_GTLC_ALLOWWAKEERR))
1357 DRM_ERROR("GT register access while GT waking disabled\n");
1358 I915_WRITE(VLV_GTLC_PW_STATUS, VLV_GTLC_ALLOWWAKEERR);
1361 static int vlv_suspend_complete(struct drm_i915_private *dev_priv)
1367 * Bspec defines the following GT well on flags as debug only, so
1368 * don't treat them as hard failures.
1370 (void)vlv_wait_for_gt_wells(dev_priv, false);
1372 mask = VLV_GTLC_RENDER_CTX_EXISTS | VLV_GTLC_MEDIA_CTX_EXISTS;
1373 WARN_ON((I915_READ(VLV_GTLC_WAKE_CTRL) & mask) != mask);
1375 vlv_check_no_gt_access(dev_priv);
1377 err = vlv_force_gfx_clock(dev_priv, true);
1381 err = vlv_allow_gt_wake(dev_priv, false);
1385 if (!IS_CHERRYVIEW(dev_priv->dev))
1386 vlv_save_gunit_s0ix_state(dev_priv);
1388 err = vlv_force_gfx_clock(dev_priv, false);
1395 /* For safety always re-enable waking and disable gfx clock forcing */
1396 vlv_allow_gt_wake(dev_priv, true);
1398 vlv_force_gfx_clock(dev_priv, false);
1403 static int vlv_resume_prepare(struct drm_i915_private *dev_priv,
1406 struct drm_device *dev = dev_priv->dev;
1411 * If any of the steps fail just try to continue, that's the best we
1412 * can do at this point. Return the first error code (which will also
1413 * leave RPM permanently disabled).
1415 ret = vlv_force_gfx_clock(dev_priv, true);
1417 if (!IS_CHERRYVIEW(dev_priv->dev))
1418 vlv_restore_gunit_s0ix_state(dev_priv);
1420 err = vlv_allow_gt_wake(dev_priv, true);
1424 err = vlv_force_gfx_clock(dev_priv, false);
1428 vlv_check_no_gt_access(dev_priv);
1431 intel_init_clock_gating(dev);
1432 i915_gem_restore_fences(dev);
1438 static int intel_runtime_suspend(struct device *device)
1440 struct pci_dev *pdev = to_pci_dev(device);
1441 struct drm_device *dev = pci_get_drvdata(pdev);
1442 struct drm_i915_private *dev_priv = dev->dev_private;
1445 if (WARN_ON_ONCE(!(dev_priv->rps.enabled && intel_enable_rc6(dev))))
1448 if (WARN_ON_ONCE(!HAS_RUNTIME_PM(dev)))
1451 DRM_DEBUG_KMS("Suspending device\n");
1454 * We could deadlock here in case another thread holding struct_mutex
1455 * calls RPM suspend concurrently, since the RPM suspend will wait
1456 * first for this RPM suspend to finish. In this case the concurrent
1457 * RPM resume will be followed by its RPM suspend counterpart. Still
1458 * for consistency return -EAGAIN, which will reschedule this suspend.
1460 if (!mutex_trylock(&dev->struct_mutex)) {
1461 DRM_DEBUG_KMS("device lock contention, deffering suspend\n");
1463 * Bump the expiration timestamp, otherwise the suspend won't
1466 pm_runtime_mark_last_busy(device);
1471 * We are safe here against re-faults, since the fault handler takes
1474 i915_gem_release_all_mmaps(dev_priv);
1475 mutex_unlock(&dev->struct_mutex);
1477 intel_suspend_gt_powersave(dev);
1478 intel_runtime_pm_disable_interrupts(dev_priv);
1480 ret = intel_suspend_complete(dev_priv);
1482 DRM_ERROR("Runtime suspend failed, disabling it (%d)\n", ret);
1483 intel_runtime_pm_enable_interrupts(dev_priv);
1488 cancel_delayed_work_sync(&dev_priv->gpu_error.hangcheck_work);
1489 intel_uncore_forcewake_reset(dev, false);
1490 dev_priv->pm.suspended = true;
1493 * FIXME: We really should find a document that references the arguments
1496 if (IS_HASWELL(dev)) {
1498 * current versions of firmware which depend on this opregion
1499 * notification have repurposed the D1 definition to mean
1500 * "runtime suspended" vs. what you would normally expect (D3)
1501 * to distinguish it from notifications that might be sent via
1504 intel_opregion_notify_adapter(dev, PCI_D1);
1507 * On Broadwell, if we use PCI_D1 the PCH DDI ports will stop
1508 * being detected, and the call we do at intel_runtime_resume()
1509 * won't be able to restore them. Since PCI_D3hot matches the
1510 * actual specification and appears to be working, use it. Let's
1511 * assume the other non-Haswell platforms will stay the same as
1514 intel_opregion_notify_adapter(dev, PCI_D3hot);
1517 assert_forcewakes_inactive(dev_priv);
1519 DRM_DEBUG_KMS("Device suspended\n");
1523 static int intel_runtime_resume(struct device *device)
1525 struct pci_dev *pdev = to_pci_dev(device);
1526 struct drm_device *dev = pci_get_drvdata(pdev);
1527 struct drm_i915_private *dev_priv = dev->dev_private;
1530 if (WARN_ON_ONCE(!HAS_RUNTIME_PM(dev)))
1533 DRM_DEBUG_KMS("Resuming device\n");
1535 intel_opregion_notify_adapter(dev, PCI_D0);
1536 dev_priv->pm.suspended = false;
1538 if (IS_GEN6(dev_priv))
1539 intel_init_pch_refclk(dev);
1541 if (IS_BROXTON(dev))
1542 ret = bxt_resume_prepare(dev_priv);
1543 else if (IS_SKYLAKE(dev))
1544 ret = skl_resume_prepare(dev_priv);
1545 else if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv))
1546 hsw_disable_pc8(dev_priv);
1547 else if (IS_VALLEYVIEW(dev_priv))
1548 ret = vlv_resume_prepare(dev_priv, true);
1551 * No point of rolling back things in case of an error, as the best
1552 * we can do is to hope that things will still work (and disable RPM).
1554 i915_gem_init_swizzling(dev);
1555 gen6_update_ring_freq(dev);
1557 intel_runtime_pm_enable_interrupts(dev_priv);
1558 intel_enable_gt_powersave(dev);
1561 DRM_ERROR("Runtime resume failed, disabling it (%d)\n", ret);
1563 DRM_DEBUG_KMS("Device resumed\n");
1569 * This function implements common functionality of runtime and system
1572 static int intel_suspend_complete(struct drm_i915_private *dev_priv)
1576 if (IS_BROXTON(dev_priv))
1577 ret = bxt_suspend_complete(dev_priv);
1578 else if (IS_SKYLAKE(dev_priv))
1579 ret = skl_suspend_complete(dev_priv);
1580 else if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv))
1581 ret = hsw_suspend_complete(dev_priv);
1582 else if (IS_VALLEYVIEW(dev_priv))
1583 ret = vlv_suspend_complete(dev_priv);
1590 static const struct dev_pm_ops i915_pm_ops = {
1592 * S0ix (via system suspend) and S3 event handlers [PMSG_SUSPEND,
1595 .suspend = i915_pm_suspend,
1596 .suspend_late = i915_pm_suspend_late,
1597 .resume_early = i915_pm_resume_early,
1598 .resume = i915_pm_resume,
1602 * @freeze, @freeze_late : called (1) before creating the
1603 * hibernation image [PMSG_FREEZE] and
1604 * (2) after rebooting, before restoring
1605 * the image [PMSG_QUIESCE]
1606 * @thaw, @thaw_early : called (1) after creating the hibernation
1607 * image, before writing it [PMSG_THAW]
1608 * and (2) after failing to create or
1609 * restore the image [PMSG_RECOVER]
1610 * @poweroff, @poweroff_late: called after writing the hibernation
1611 * image, before rebooting [PMSG_HIBERNATE]
1612 * @restore, @restore_early : called after rebooting and restoring the
1613 * hibernation image [PMSG_RESTORE]
1615 .freeze = i915_pm_suspend,
1616 .freeze_late = i915_pm_suspend_late,
1617 .thaw_early = i915_pm_resume_early,
1618 .thaw = i915_pm_resume,
1619 .poweroff = i915_pm_suspend,
1620 .poweroff_late = i915_pm_poweroff_late,
1621 .restore_early = i915_pm_resume_early,
1622 .restore = i915_pm_resume,
1624 /* S0ix (via runtime suspend) event handlers */
1625 .runtime_suspend = intel_runtime_suspend,
1626 .runtime_resume = intel_runtime_resume,
1629 static const struct vm_operations_struct i915_gem_vm_ops = {
1630 .fault = i915_gem_fault,
1631 .open = drm_gem_vm_open,
1632 .close = drm_gem_vm_close,
1635 static const struct file_operations i915_driver_fops = {
1636 .owner = THIS_MODULE,
1638 .release = drm_release,
1639 .unlocked_ioctl = drm_ioctl,
1640 .mmap = drm_gem_mmap,
1643 #ifdef CONFIG_COMPAT
1644 .compat_ioctl = i915_compat_ioctl,
1646 .llseek = noop_llseek,
1649 static struct drm_driver driver = {
1650 /* Don't use MTRRs here; the Xserver or userspace app should
1651 * deal with them for Intel hardware.
1655 DRIVER_HAVE_IRQ | DRIVER_IRQ_SHARED | DRIVER_GEM | DRIVER_PRIME |
1657 .load = i915_driver_load,
1658 .unload = i915_driver_unload,
1659 .open = i915_driver_open,
1660 .lastclose = i915_driver_lastclose,
1661 .preclose = i915_driver_preclose,
1662 .postclose = i915_driver_postclose,
1663 .set_busid = drm_pci_set_busid,
1665 /* Used in place of i915_pm_ops for non-DRIVER_MODESET */
1666 .suspend = i915_suspend_legacy,
1667 .resume = i915_resume_legacy,
1669 .device_is_agp = i915_driver_device_is_agp,
1670 #if defined(CONFIG_DEBUG_FS)
1671 .debugfs_init = i915_debugfs_init,
1672 .debugfs_cleanup = i915_debugfs_cleanup,
1674 .gem_free_object = i915_gem_free_object,
1675 .gem_vm_ops = &i915_gem_vm_ops,
1677 .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
1678 .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
1679 .gem_prime_export = i915_gem_prime_export,
1680 .gem_prime_import = i915_gem_prime_import,
1682 .dumb_create = i915_gem_dumb_create,
1683 .dumb_map_offset = i915_gem_mmap_gtt,
1684 .dumb_destroy = drm_gem_dumb_destroy,
1685 .ioctls = i915_ioctls,
1686 .fops = &i915_driver_fops,
1687 .name = DRIVER_NAME,
1688 .desc = DRIVER_DESC,
1689 .date = DRIVER_DATE,
1690 .major = DRIVER_MAJOR,
1691 .minor = DRIVER_MINOR,
1692 .patchlevel = DRIVER_PATCHLEVEL,
1695 static struct pci_driver i915_pci_driver = {
1696 .name = DRIVER_NAME,
1697 .id_table = pciidlist,
1698 .probe = i915_pci_probe,
1699 .remove = i915_pci_remove,
1700 .driver.pm = &i915_pm_ops,
1703 static int __init i915_init(void)
1705 driver.num_ioctls = i915_max_ioctl;
1708 * Enable KMS by default, unless explicitly overriden by
1709 * either the i915.modeset prarameter or by the
1710 * vga_text_mode_force boot option.
1712 driver.driver_features |= DRIVER_MODESET;
1714 if (i915.modeset == 0)
1715 driver.driver_features &= ~DRIVER_MODESET;
1717 #ifdef CONFIG_VGA_CONSOLE
1718 if (vgacon_text_force() && i915.modeset == -1)
1719 driver.driver_features &= ~DRIVER_MODESET;
1722 if (!(driver.driver_features & DRIVER_MODESET)) {
1723 driver.get_vblank_timestamp = NULL;
1724 /* Silently fail loading to not upset userspace. */
1725 DRM_DEBUG_DRIVER("KMS and UMS disabled.\n");
1730 * FIXME: Note that we're lying to the DRM core here so that we can get access
1731 * to the atomic ioctl and the atomic properties. Only plane operations on
1732 * a single CRTC will actually work.
1734 if (driver.driver_features & DRIVER_MODESET)
1735 driver.driver_features |= DRIVER_ATOMIC;
1737 return drm_pci_init(&driver, &i915_pci_driver);
1740 static void __exit i915_exit(void)
1742 if (!(driver.driver_features & DRIVER_MODESET))
1743 return; /* Never loaded a driver. */
1745 drm_pci_exit(&driver, &i915_pci_driver);
1748 module_init(i915_init);
1749 module_exit(i915_exit);
1751 MODULE_AUTHOR("Tungsten Graphics, Inc.");
1752 MODULE_AUTHOR("Intel Corporation");
1754 MODULE_DESCRIPTION(DRIVER_DESC);
1755 MODULE_LICENSE("GPL and additional rights");