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/acpi.h>
31 #include <linux/device.h>
32 #include <linux/oom.h>
33 #include <linux/module.h>
34 #include <linux/pci.h>
36 #include <linux/pm_runtime.h>
37 #include <linux/pnp.h>
38 #include <linux/slab.h>
39 #include <linux/vgaarb.h>
40 #include <linux/vga_switcheroo.h>
42 #include <acpi/video.h>
45 #include <drm/drm_crtc_helper.h>
46 #include <drm/drm_atomic_helper.h>
47 #include <drm/i915_drm.h>
50 #include "i915_trace.h"
52 #include "i915_query.h"
53 #include "i915_vgpu.h"
54 #include "intel_drv.h"
57 static struct drm_driver driver;
59 #if IS_ENABLED(CONFIG_DRM_I915_DEBUG)
60 static unsigned int i915_load_fail_count;
62 bool __i915_inject_load_failure(const char *func, int line)
64 if (i915_load_fail_count >= i915_modparams.inject_load_failure)
67 if (++i915_load_fail_count == i915_modparams.inject_load_failure) {
68 DRM_INFO("Injecting failure at checkpoint %u [%s:%d]\n",
69 i915_modparams.inject_load_failure, func, line);
70 i915_modparams.inject_load_failure = 0;
77 bool i915_error_injected(void)
79 return i915_load_fail_count && !i915_modparams.inject_load_failure;
84 #define FDO_BUG_URL "https://bugs.freedesktop.org/enter_bug.cgi?product=DRI"
85 #define FDO_BUG_MSG "Please file a bug at " FDO_BUG_URL " against DRM/Intel " \
86 "providing the dmesg log by booting with drm.debug=0xf"
89 __i915_printk(struct drm_i915_private *dev_priv, const char *level,
92 static bool shown_bug_once;
93 struct device *kdev = dev_priv->drm.dev;
94 bool is_error = level[1] <= KERN_ERR[1];
95 bool is_debug = level[1] == KERN_DEBUG[1];
99 if (is_debug && !(drm_debug & DRM_UT_DRIVER))
108 dev_printk(level, kdev, "%pV", &vaf);
110 dev_printk(level, kdev, "[" DRM_NAME ":%ps] %pV",
111 __builtin_return_address(0), &vaf);
115 if (is_error && !shown_bug_once) {
117 * Ask the user to file a bug report for the error, except
118 * if they may have caused the bug by fiddling with unsafe
121 if (!test_taint(TAINT_USER))
122 dev_notice(kdev, "%s", FDO_BUG_MSG);
123 shown_bug_once = true;
127 /* Map PCH device id to PCH type, or PCH_NONE if unknown. */
128 static enum intel_pch
129 intel_pch_type(const struct drm_i915_private *dev_priv, unsigned short id)
132 case INTEL_PCH_IBX_DEVICE_ID_TYPE:
133 DRM_DEBUG_KMS("Found Ibex Peak PCH\n");
134 WARN_ON(!IS_GEN5(dev_priv));
136 case INTEL_PCH_CPT_DEVICE_ID_TYPE:
137 DRM_DEBUG_KMS("Found CougarPoint PCH\n");
138 WARN_ON(!IS_GEN6(dev_priv) && !IS_IVYBRIDGE(dev_priv));
140 case INTEL_PCH_PPT_DEVICE_ID_TYPE:
141 DRM_DEBUG_KMS("Found PantherPoint PCH\n");
142 WARN_ON(!IS_GEN6(dev_priv) && !IS_IVYBRIDGE(dev_priv));
143 /* PantherPoint is CPT compatible */
145 case INTEL_PCH_LPT_DEVICE_ID_TYPE:
146 DRM_DEBUG_KMS("Found LynxPoint PCH\n");
147 WARN_ON(!IS_HASWELL(dev_priv) && !IS_BROADWELL(dev_priv));
148 WARN_ON(IS_HSW_ULT(dev_priv) || IS_BDW_ULT(dev_priv));
150 case INTEL_PCH_LPT_LP_DEVICE_ID_TYPE:
151 DRM_DEBUG_KMS("Found LynxPoint LP PCH\n");
152 WARN_ON(!IS_HASWELL(dev_priv) && !IS_BROADWELL(dev_priv));
153 WARN_ON(!IS_HSW_ULT(dev_priv) && !IS_BDW_ULT(dev_priv));
155 case INTEL_PCH_WPT_DEVICE_ID_TYPE:
156 DRM_DEBUG_KMS("Found WildcatPoint PCH\n");
157 WARN_ON(!IS_HASWELL(dev_priv) && !IS_BROADWELL(dev_priv));
158 WARN_ON(IS_HSW_ULT(dev_priv) || IS_BDW_ULT(dev_priv));
159 /* WildcatPoint is LPT compatible */
161 case INTEL_PCH_WPT_LP_DEVICE_ID_TYPE:
162 DRM_DEBUG_KMS("Found WildcatPoint LP PCH\n");
163 WARN_ON(!IS_HASWELL(dev_priv) && !IS_BROADWELL(dev_priv));
164 WARN_ON(!IS_HSW_ULT(dev_priv) && !IS_BDW_ULT(dev_priv));
165 /* WildcatPoint is LPT compatible */
167 case INTEL_PCH_SPT_DEVICE_ID_TYPE:
168 DRM_DEBUG_KMS("Found SunrisePoint PCH\n");
169 WARN_ON(!IS_SKYLAKE(dev_priv) && !IS_KABYLAKE(dev_priv));
171 case INTEL_PCH_SPT_LP_DEVICE_ID_TYPE:
172 DRM_DEBUG_KMS("Found SunrisePoint LP PCH\n");
173 WARN_ON(!IS_SKYLAKE(dev_priv) && !IS_KABYLAKE(dev_priv));
175 case INTEL_PCH_KBP_DEVICE_ID_TYPE:
176 DRM_DEBUG_KMS("Found Kaby Lake PCH (KBP)\n");
177 WARN_ON(!IS_SKYLAKE(dev_priv) && !IS_KABYLAKE(dev_priv) &&
178 !IS_COFFEELAKE(dev_priv));
180 case INTEL_PCH_CNP_DEVICE_ID_TYPE:
181 DRM_DEBUG_KMS("Found Cannon Lake PCH (CNP)\n");
182 WARN_ON(!IS_CANNONLAKE(dev_priv) && !IS_COFFEELAKE(dev_priv));
184 case INTEL_PCH_CNP_LP_DEVICE_ID_TYPE:
185 DRM_DEBUG_KMS("Found Cannon Lake LP PCH (CNP-LP)\n");
186 WARN_ON(!IS_CANNONLAKE(dev_priv) && !IS_COFFEELAKE(dev_priv));
188 case INTEL_PCH_ICP_DEVICE_ID_TYPE:
189 DRM_DEBUG_KMS("Found Ice Lake PCH\n");
190 WARN_ON(!IS_ICELAKE(dev_priv));
197 static bool intel_is_virt_pch(unsigned short id,
198 unsigned short svendor, unsigned short sdevice)
200 return (id == INTEL_PCH_P2X_DEVICE_ID_TYPE ||
201 id == INTEL_PCH_P3X_DEVICE_ID_TYPE ||
202 (id == INTEL_PCH_QEMU_DEVICE_ID_TYPE &&
203 svendor == PCI_SUBVENDOR_ID_REDHAT_QUMRANET &&
204 sdevice == PCI_SUBDEVICE_ID_QEMU));
207 static unsigned short
208 intel_virt_detect_pch(const struct drm_i915_private *dev_priv)
210 unsigned short id = 0;
213 * In a virtualized passthrough environment we can be in a
214 * setup where the ISA bridge is not able to be passed through.
215 * In this case, a south bridge can be emulated and we have to
216 * make an educated guess as to which PCH is really there.
219 if (IS_GEN5(dev_priv))
220 id = INTEL_PCH_IBX_DEVICE_ID_TYPE;
221 else if (IS_GEN6(dev_priv) || IS_IVYBRIDGE(dev_priv))
222 id = INTEL_PCH_CPT_DEVICE_ID_TYPE;
223 else if (IS_HSW_ULT(dev_priv) || IS_BDW_ULT(dev_priv))
224 id = INTEL_PCH_LPT_LP_DEVICE_ID_TYPE;
225 else if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv))
226 id = INTEL_PCH_LPT_DEVICE_ID_TYPE;
227 else if (IS_SKYLAKE(dev_priv) || IS_KABYLAKE(dev_priv))
228 id = INTEL_PCH_SPT_DEVICE_ID_TYPE;
229 else if (IS_COFFEELAKE(dev_priv) || IS_CANNONLAKE(dev_priv))
230 id = INTEL_PCH_CNP_DEVICE_ID_TYPE;
231 else if (IS_ICELAKE(dev_priv))
232 id = INTEL_PCH_ICP_DEVICE_ID_TYPE;
235 DRM_DEBUG_KMS("Assuming PCH ID %04x\n", id);
237 DRM_DEBUG_KMS("Assuming no PCH\n");
242 static void intel_detect_pch(struct drm_i915_private *dev_priv)
244 struct pci_dev *pch = NULL;
247 * The reason to probe ISA bridge instead of Dev31:Fun0 is to
248 * make graphics device passthrough work easy for VMM, that only
249 * need to expose ISA bridge to let driver know the real hardware
250 * underneath. This is a requirement from virtualization team.
252 * In some virtualized environments (e.g. XEN), there is irrelevant
253 * ISA bridge in the system. To work reliably, we should scan trhough
254 * all the ISA bridge devices and check for the first match, instead
255 * of only checking the first one.
257 while ((pch = pci_get_class(PCI_CLASS_BRIDGE_ISA << 8, pch))) {
259 enum intel_pch pch_type;
261 if (pch->vendor != PCI_VENDOR_ID_INTEL)
264 id = pch->device & INTEL_PCH_DEVICE_ID_MASK;
266 pch_type = intel_pch_type(dev_priv, id);
267 if (pch_type != PCH_NONE) {
268 dev_priv->pch_type = pch_type;
269 dev_priv->pch_id = id;
271 } else if (intel_is_virt_pch(id, pch->subsystem_vendor,
272 pch->subsystem_device)) {
273 id = intel_virt_detect_pch(dev_priv);
274 pch_type = intel_pch_type(dev_priv, id);
276 /* Sanity check virtual PCH id */
277 if (WARN_ON(id && pch_type == PCH_NONE))
280 dev_priv->pch_type = pch_type;
281 dev_priv->pch_id = id;
287 * Use PCH_NOP (PCH but no South Display) for PCH platforms without
290 if (pch && INTEL_INFO(dev_priv)->num_pipes == 0) {
291 DRM_DEBUG_KMS("Display disabled, reverting to NOP PCH\n");
292 dev_priv->pch_type = PCH_NOP;
293 dev_priv->pch_id = 0;
297 DRM_DEBUG_KMS("No PCH found.\n");
302 static int i915_getparam_ioctl(struct drm_device *dev, void *data,
303 struct drm_file *file_priv)
305 struct drm_i915_private *dev_priv = to_i915(dev);
306 struct pci_dev *pdev = dev_priv->drm.pdev;
307 drm_i915_getparam_t *param = data;
310 switch (param->param) {
311 case I915_PARAM_IRQ_ACTIVE:
312 case I915_PARAM_ALLOW_BATCHBUFFER:
313 case I915_PARAM_LAST_DISPATCH:
314 case I915_PARAM_HAS_EXEC_CONSTANTS:
315 /* Reject all old ums/dri params. */
317 case I915_PARAM_CHIPSET_ID:
318 value = pdev->device;
320 case I915_PARAM_REVISION:
321 value = pdev->revision;
323 case I915_PARAM_NUM_FENCES_AVAIL:
324 value = dev_priv->num_fence_regs;
326 case I915_PARAM_HAS_OVERLAY:
327 value = dev_priv->overlay ? 1 : 0;
329 case I915_PARAM_HAS_BSD:
330 value = !!dev_priv->engine[VCS];
332 case I915_PARAM_HAS_BLT:
333 value = !!dev_priv->engine[BCS];
335 case I915_PARAM_HAS_VEBOX:
336 value = !!dev_priv->engine[VECS];
338 case I915_PARAM_HAS_BSD2:
339 value = !!dev_priv->engine[VCS2];
341 case I915_PARAM_HAS_LLC:
342 value = HAS_LLC(dev_priv);
344 case I915_PARAM_HAS_WT:
345 value = HAS_WT(dev_priv);
347 case I915_PARAM_HAS_ALIASING_PPGTT:
348 value = USES_PPGTT(dev_priv);
350 case I915_PARAM_HAS_SEMAPHORES:
351 value = HAS_LEGACY_SEMAPHORES(dev_priv);
353 case I915_PARAM_HAS_SECURE_BATCHES:
354 value = capable(CAP_SYS_ADMIN);
356 case I915_PARAM_CMD_PARSER_VERSION:
357 value = i915_cmd_parser_get_version(dev_priv);
359 case I915_PARAM_SUBSLICE_TOTAL:
360 value = sseu_subslice_total(&INTEL_INFO(dev_priv)->sseu);
364 case I915_PARAM_EU_TOTAL:
365 value = INTEL_INFO(dev_priv)->sseu.eu_total;
369 case I915_PARAM_HAS_GPU_RESET:
370 value = i915_modparams.enable_hangcheck &&
371 intel_has_gpu_reset(dev_priv);
372 if (value && intel_has_reset_engine(dev_priv))
375 case I915_PARAM_HAS_RESOURCE_STREAMER:
378 case I915_PARAM_HAS_POOLED_EU:
379 value = HAS_POOLED_EU(dev_priv);
381 case I915_PARAM_MIN_EU_IN_POOL:
382 value = INTEL_INFO(dev_priv)->sseu.min_eu_in_pool;
384 case I915_PARAM_HUC_STATUS:
385 value = intel_huc_check_status(&dev_priv->huc);
389 case I915_PARAM_MMAP_GTT_VERSION:
390 /* Though we've started our numbering from 1, and so class all
391 * earlier versions as 0, in effect their value is undefined as
392 * the ioctl will report EINVAL for the unknown param!
394 value = i915_gem_mmap_gtt_version();
396 case I915_PARAM_HAS_SCHEDULER:
397 value = dev_priv->caps.scheduler;
400 case I915_PARAM_MMAP_VERSION:
401 /* Remember to bump this if the version changes! */
402 case I915_PARAM_HAS_GEM:
403 case I915_PARAM_HAS_PAGEFLIPPING:
404 case I915_PARAM_HAS_EXECBUF2: /* depends on GEM */
405 case I915_PARAM_HAS_RELAXED_FENCING:
406 case I915_PARAM_HAS_COHERENT_RINGS:
407 case I915_PARAM_HAS_RELAXED_DELTA:
408 case I915_PARAM_HAS_GEN7_SOL_RESET:
409 case I915_PARAM_HAS_WAIT_TIMEOUT:
410 case I915_PARAM_HAS_PRIME_VMAP_FLUSH:
411 case I915_PARAM_HAS_PINNED_BATCHES:
412 case I915_PARAM_HAS_EXEC_NO_RELOC:
413 case I915_PARAM_HAS_EXEC_HANDLE_LUT:
414 case I915_PARAM_HAS_COHERENT_PHYS_GTT:
415 case I915_PARAM_HAS_EXEC_SOFTPIN:
416 case I915_PARAM_HAS_EXEC_ASYNC:
417 case I915_PARAM_HAS_EXEC_FENCE:
418 case I915_PARAM_HAS_EXEC_CAPTURE:
419 case I915_PARAM_HAS_EXEC_BATCH_FIRST:
420 case I915_PARAM_HAS_EXEC_FENCE_ARRAY:
421 /* For the time being all of these are always true;
422 * if some supported hardware does not have one of these
423 * features this value needs to be provided from
424 * INTEL_INFO(), a feature macro, or similar.
428 case I915_PARAM_HAS_CONTEXT_ISOLATION:
429 value = intel_engines_has_context_isolation(dev_priv);
431 case I915_PARAM_SLICE_MASK:
432 value = INTEL_INFO(dev_priv)->sseu.slice_mask;
436 case I915_PARAM_SUBSLICE_MASK:
437 value = INTEL_INFO(dev_priv)->sseu.subslice_mask[0];
441 case I915_PARAM_CS_TIMESTAMP_FREQUENCY:
442 value = 1000 * INTEL_INFO(dev_priv)->cs_timestamp_frequency_khz;
444 case I915_PARAM_MMAP_GTT_COHERENT:
445 value = INTEL_INFO(dev_priv)->has_coherent_ggtt;
448 DRM_DEBUG("Unknown parameter %d\n", param->param);
452 if (put_user(value, param->value))
458 static int i915_get_bridge_dev(struct drm_i915_private *dev_priv)
460 int domain = pci_domain_nr(dev_priv->drm.pdev->bus);
462 dev_priv->bridge_dev =
463 pci_get_domain_bus_and_slot(domain, 0, PCI_DEVFN(0, 0));
464 if (!dev_priv->bridge_dev) {
465 DRM_ERROR("bridge device not found\n");
471 /* Allocate space for the MCH regs if needed, return nonzero on error */
473 intel_alloc_mchbar_resource(struct drm_i915_private *dev_priv)
475 int reg = INTEL_GEN(dev_priv) >= 4 ? MCHBAR_I965 : MCHBAR_I915;
476 u32 temp_lo, temp_hi = 0;
480 if (INTEL_GEN(dev_priv) >= 4)
481 pci_read_config_dword(dev_priv->bridge_dev, reg + 4, &temp_hi);
482 pci_read_config_dword(dev_priv->bridge_dev, reg, &temp_lo);
483 mchbar_addr = ((u64)temp_hi << 32) | temp_lo;
485 /* If ACPI doesn't have it, assume we need to allocate it ourselves */
488 pnp_range_reserved(mchbar_addr, mchbar_addr + MCHBAR_SIZE))
492 /* Get some space for it */
493 dev_priv->mch_res.name = "i915 MCHBAR";
494 dev_priv->mch_res.flags = IORESOURCE_MEM;
495 ret = pci_bus_alloc_resource(dev_priv->bridge_dev->bus,
497 MCHBAR_SIZE, MCHBAR_SIZE,
499 0, pcibios_align_resource,
500 dev_priv->bridge_dev);
502 DRM_DEBUG_DRIVER("failed bus alloc: %d\n", ret);
503 dev_priv->mch_res.start = 0;
507 if (INTEL_GEN(dev_priv) >= 4)
508 pci_write_config_dword(dev_priv->bridge_dev, reg + 4,
509 upper_32_bits(dev_priv->mch_res.start));
511 pci_write_config_dword(dev_priv->bridge_dev, reg,
512 lower_32_bits(dev_priv->mch_res.start));
516 /* Setup MCHBAR if possible, return true if we should disable it again */
518 intel_setup_mchbar(struct drm_i915_private *dev_priv)
520 int mchbar_reg = INTEL_GEN(dev_priv) >= 4 ? MCHBAR_I965 : MCHBAR_I915;
524 if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
527 dev_priv->mchbar_need_disable = false;
529 if (IS_I915G(dev_priv) || IS_I915GM(dev_priv)) {
530 pci_read_config_dword(dev_priv->bridge_dev, DEVEN, &temp);
531 enabled = !!(temp & DEVEN_MCHBAR_EN);
533 pci_read_config_dword(dev_priv->bridge_dev, mchbar_reg, &temp);
537 /* If it's already enabled, don't have to do anything */
541 if (intel_alloc_mchbar_resource(dev_priv))
544 dev_priv->mchbar_need_disable = true;
546 /* Space is allocated or reserved, so enable it. */
547 if (IS_I915G(dev_priv) || IS_I915GM(dev_priv)) {
548 pci_write_config_dword(dev_priv->bridge_dev, DEVEN,
549 temp | DEVEN_MCHBAR_EN);
551 pci_read_config_dword(dev_priv->bridge_dev, mchbar_reg, &temp);
552 pci_write_config_dword(dev_priv->bridge_dev, mchbar_reg, temp | 1);
557 intel_teardown_mchbar(struct drm_i915_private *dev_priv)
559 int mchbar_reg = INTEL_GEN(dev_priv) >= 4 ? MCHBAR_I965 : MCHBAR_I915;
561 if (dev_priv->mchbar_need_disable) {
562 if (IS_I915G(dev_priv) || IS_I915GM(dev_priv)) {
565 pci_read_config_dword(dev_priv->bridge_dev, DEVEN,
567 deven_val &= ~DEVEN_MCHBAR_EN;
568 pci_write_config_dword(dev_priv->bridge_dev, DEVEN,
573 pci_read_config_dword(dev_priv->bridge_dev, mchbar_reg,
576 pci_write_config_dword(dev_priv->bridge_dev, mchbar_reg,
581 if (dev_priv->mch_res.start)
582 release_resource(&dev_priv->mch_res);
585 /* true = enable decode, false = disable decoder */
586 static unsigned int i915_vga_set_decode(void *cookie, bool state)
588 struct drm_i915_private *dev_priv = cookie;
590 intel_modeset_vga_set_state(dev_priv, state);
592 return VGA_RSRC_LEGACY_IO | VGA_RSRC_LEGACY_MEM |
593 VGA_RSRC_NORMAL_IO | VGA_RSRC_NORMAL_MEM;
595 return VGA_RSRC_NORMAL_IO | VGA_RSRC_NORMAL_MEM;
598 static int i915_resume_switcheroo(struct drm_device *dev);
599 static int i915_suspend_switcheroo(struct drm_device *dev, pm_message_t state);
601 static void i915_switcheroo_set_state(struct pci_dev *pdev, enum vga_switcheroo_state state)
603 struct drm_device *dev = pci_get_drvdata(pdev);
604 pm_message_t pmm = { .event = PM_EVENT_SUSPEND };
606 if (state == VGA_SWITCHEROO_ON) {
607 pr_info("switched on\n");
608 dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;
609 /* i915 resume handler doesn't set to D0 */
610 pci_set_power_state(pdev, PCI_D0);
611 i915_resume_switcheroo(dev);
612 dev->switch_power_state = DRM_SWITCH_POWER_ON;
614 pr_info("switched off\n");
615 dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;
616 i915_suspend_switcheroo(dev, pmm);
617 dev->switch_power_state = DRM_SWITCH_POWER_OFF;
621 static bool i915_switcheroo_can_switch(struct pci_dev *pdev)
623 struct drm_device *dev = pci_get_drvdata(pdev);
626 * FIXME: open_count is protected by drm_global_mutex but that would lead to
627 * locking inversion with the driver load path. And the access here is
628 * completely racy anyway. So don't bother with locking for now.
630 return dev->open_count == 0;
633 static const struct vga_switcheroo_client_ops i915_switcheroo_ops = {
634 .set_gpu_state = i915_switcheroo_set_state,
636 .can_switch = i915_switcheroo_can_switch,
639 static int i915_load_modeset_init(struct drm_device *dev)
641 struct drm_i915_private *dev_priv = to_i915(dev);
642 struct pci_dev *pdev = dev_priv->drm.pdev;
645 if (i915_inject_load_failure())
648 intel_bios_init(dev_priv);
650 /* If we have > 1 VGA cards, then we need to arbitrate access
651 * to the common VGA resources.
653 * If we are a secondary display controller (!PCI_DISPLAY_CLASS_VGA),
654 * then we do not take part in VGA arbitration and the
655 * vga_client_register() fails with -ENODEV.
657 ret = vga_client_register(pdev, dev_priv, NULL, i915_vga_set_decode);
658 if (ret && ret != -ENODEV)
661 intel_register_dsm_handler();
663 ret = vga_switcheroo_register_client(pdev, &i915_switcheroo_ops, false);
665 goto cleanup_vga_client;
667 /* must happen before intel_power_domains_init_hw() on VLV/CHV */
668 intel_update_rawclk(dev_priv);
670 intel_power_domains_init_hw(dev_priv, false);
672 intel_csr_ucode_init(dev_priv);
674 ret = intel_irq_install(dev_priv);
678 intel_setup_gmbus(dev_priv);
680 /* Important: The output setup functions called by modeset_init need
681 * working irqs for e.g. gmbus and dp aux transfers. */
682 ret = intel_modeset_init(dev);
686 ret = i915_gem_init(dev_priv);
688 goto cleanup_modeset;
690 intel_setup_overlay(dev_priv);
692 if (INTEL_INFO(dev_priv)->num_pipes == 0)
695 ret = intel_fbdev_init(dev);
699 /* Only enable hotplug handling once the fbdev is fully set up. */
700 intel_hpd_init(dev_priv);
705 if (i915_gem_suspend(dev_priv))
706 DRM_ERROR("failed to idle hardware; continuing to unload!\n");
707 i915_gem_fini(dev_priv);
709 intel_modeset_cleanup(dev);
711 drm_irq_uninstall(dev);
712 intel_teardown_gmbus(dev_priv);
714 intel_csr_ucode_fini(dev_priv);
715 intel_power_domains_fini_hw(dev_priv);
716 vga_switcheroo_unregister_client(pdev);
718 vga_client_register(pdev, NULL, NULL, NULL);
723 static int i915_kick_out_firmware_fb(struct drm_i915_private *dev_priv)
725 struct apertures_struct *ap;
726 struct pci_dev *pdev = dev_priv->drm.pdev;
727 struct i915_ggtt *ggtt = &dev_priv->ggtt;
731 ap = alloc_apertures(1);
735 ap->ranges[0].base = ggtt->gmadr.start;
736 ap->ranges[0].size = ggtt->mappable_end;
739 pdev->resource[PCI_ROM_RESOURCE].flags & IORESOURCE_ROM_SHADOW;
741 ret = drm_fb_helper_remove_conflicting_framebuffers(ap, "inteldrmfb", primary);
748 #if !defined(CONFIG_VGA_CONSOLE)
749 static int i915_kick_out_vgacon(struct drm_i915_private *dev_priv)
753 #elif !defined(CONFIG_DUMMY_CONSOLE)
754 static int i915_kick_out_vgacon(struct drm_i915_private *dev_priv)
759 static int i915_kick_out_vgacon(struct drm_i915_private *dev_priv)
763 DRM_INFO("Replacing VGA console driver\n");
766 if (con_is_bound(&vga_con))
767 ret = do_take_over_console(&dummy_con, 0, MAX_NR_CONSOLES - 1, 1);
769 ret = do_unregister_con_driver(&vga_con);
771 /* Ignore "already unregistered". */
781 static void intel_init_dpio(struct drm_i915_private *dev_priv)
784 * IOSF_PORT_DPIO is used for VLV x2 PHY (DP/HDMI B and C),
785 * CHV x1 PHY (DP/HDMI D)
786 * IOSF_PORT_DPIO_2 is used for CHV x2 PHY (DP/HDMI B and C)
788 if (IS_CHERRYVIEW(dev_priv)) {
789 DPIO_PHY_IOSF_PORT(DPIO_PHY0) = IOSF_PORT_DPIO_2;
790 DPIO_PHY_IOSF_PORT(DPIO_PHY1) = IOSF_PORT_DPIO;
791 } else if (IS_VALLEYVIEW(dev_priv)) {
792 DPIO_PHY_IOSF_PORT(DPIO_PHY0) = IOSF_PORT_DPIO;
796 static int i915_workqueues_init(struct drm_i915_private *dev_priv)
799 * The i915 workqueue is primarily used for batched retirement of
800 * requests (and thus managing bo) once the task has been completed
801 * by the GPU. i915_retire_requests() is called directly when we
802 * need high-priority retirement, such as waiting for an explicit
805 * It is also used for periodic low-priority events, such as
806 * idle-timers and recording error state.
808 * All tasks on the workqueue are expected to acquire the dev mutex
809 * so there is no point in running more than one instance of the
810 * workqueue at any time. Use an ordered one.
812 dev_priv->wq = alloc_ordered_workqueue("i915", 0);
813 if (dev_priv->wq == NULL)
816 dev_priv->hotplug.dp_wq = alloc_ordered_workqueue("i915-dp", 0);
817 if (dev_priv->hotplug.dp_wq == NULL)
823 destroy_workqueue(dev_priv->wq);
825 DRM_ERROR("Failed to allocate workqueues.\n");
830 static void i915_engines_cleanup(struct drm_i915_private *i915)
832 struct intel_engine_cs *engine;
833 enum intel_engine_id id;
835 for_each_engine(engine, i915, id)
839 static void i915_workqueues_cleanup(struct drm_i915_private *dev_priv)
841 destroy_workqueue(dev_priv->hotplug.dp_wq);
842 destroy_workqueue(dev_priv->wq);
846 * We don't keep the workarounds for pre-production hardware, so we expect our
847 * driver to fail on these machines in one way or another. A little warning on
848 * dmesg may help both the user and the bug triagers.
850 * Our policy for removing pre-production workarounds is to keep the
851 * current gen workarounds as a guide to the bring-up of the next gen
852 * (workarounds have a habit of persisting!). Anything older than that
853 * should be removed along with the complications they introduce.
855 static void intel_detect_preproduction_hw(struct drm_i915_private *dev_priv)
859 pre |= IS_HSW_EARLY_SDV(dev_priv);
860 pre |= IS_SKL_REVID(dev_priv, 0, SKL_REVID_F0);
861 pre |= IS_BXT_REVID(dev_priv, 0, BXT_REVID_B_LAST);
864 DRM_ERROR("This is a pre-production stepping. "
865 "It may not be fully functional.\n");
866 add_taint(TAINT_MACHINE_CHECK, LOCKDEP_STILL_OK);
871 * i915_driver_init_early - setup state not requiring device access
872 * @dev_priv: device private
874 * Initialize everything that is a "SW-only" state, that is state not
875 * requiring accessing the device or exposing the driver via kernel internal
876 * or userspace interfaces. Example steps belonging here: lock initialization,
877 * system memory allocation, setting up device specific attributes and
878 * function hooks not requiring accessing the device.
880 static int i915_driver_init_early(struct drm_i915_private *dev_priv)
884 if (i915_inject_load_failure())
887 spin_lock_init(&dev_priv->irq_lock);
888 spin_lock_init(&dev_priv->gpu_error.lock);
889 mutex_init(&dev_priv->backlight_lock);
890 spin_lock_init(&dev_priv->uncore.lock);
892 mutex_init(&dev_priv->sb_lock);
893 mutex_init(&dev_priv->av_mutex);
894 mutex_init(&dev_priv->wm.wm_mutex);
895 mutex_init(&dev_priv->pps_mutex);
897 i915_memcpy_init_early(dev_priv);
899 ret = i915_workqueues_init(dev_priv);
903 ret = i915_gem_init_early(dev_priv);
907 /* This must be called before any calls to HAS_PCH_* */
908 intel_detect_pch(dev_priv);
910 intel_wopcm_init_early(&dev_priv->wopcm);
911 intel_uc_init_early(dev_priv);
912 intel_pm_setup(dev_priv);
913 intel_init_dpio(dev_priv);
914 ret = intel_power_domains_init(dev_priv);
917 intel_irq_init(dev_priv);
918 intel_hangcheck_init(dev_priv);
919 intel_init_display_hooks(dev_priv);
920 intel_init_clock_gating_hooks(dev_priv);
921 intel_init_audio_hooks(dev_priv);
922 intel_display_crc_init(dev_priv);
924 intel_detect_preproduction_hw(dev_priv);
929 intel_uc_cleanup_early(dev_priv);
930 i915_gem_cleanup_early(dev_priv);
932 i915_workqueues_cleanup(dev_priv);
934 i915_engines_cleanup(dev_priv);
939 * i915_driver_cleanup_early - cleanup the setup done in i915_driver_init_early()
940 * @dev_priv: device private
942 static void i915_driver_cleanup_early(struct drm_i915_private *dev_priv)
944 intel_irq_fini(dev_priv);
945 intel_power_domains_cleanup(dev_priv);
946 intel_uc_cleanup_early(dev_priv);
947 i915_gem_cleanup_early(dev_priv);
948 i915_workqueues_cleanup(dev_priv);
949 i915_engines_cleanup(dev_priv);
952 static int i915_mmio_setup(struct drm_i915_private *dev_priv)
954 struct pci_dev *pdev = dev_priv->drm.pdev;
958 mmio_bar = IS_GEN2(dev_priv) ? 1 : 0;
960 * Before gen4, the registers and the GTT are behind different BARs.
961 * However, from gen4 onwards, the registers and the GTT are shared
962 * in the same BAR, so we want to restrict this ioremap from
963 * clobbering the GTT which we want ioremap_wc instead. Fortunately,
964 * the register BAR remains the same size for all the earlier
965 * generations up to Ironlake.
967 if (INTEL_GEN(dev_priv) < 5)
968 mmio_size = 512 * 1024;
970 mmio_size = 2 * 1024 * 1024;
971 dev_priv->regs = pci_iomap(pdev, mmio_bar, mmio_size);
972 if (dev_priv->regs == NULL) {
973 DRM_ERROR("failed to map registers\n");
978 /* Try to make sure MCHBAR is enabled before poking at it */
979 intel_setup_mchbar(dev_priv);
984 static void i915_mmio_cleanup(struct drm_i915_private *dev_priv)
986 struct pci_dev *pdev = dev_priv->drm.pdev;
988 intel_teardown_mchbar(dev_priv);
989 pci_iounmap(pdev, dev_priv->regs);
993 * i915_driver_init_mmio - setup device MMIO
994 * @dev_priv: device private
996 * Setup minimal device state necessary for MMIO accesses later in the
997 * initialization sequence. The setup here should avoid any other device-wide
998 * side effects or exposing the driver via kernel internal or user space
1001 static int i915_driver_init_mmio(struct drm_i915_private *dev_priv)
1005 if (i915_inject_load_failure())
1008 if (i915_get_bridge_dev(dev_priv))
1011 ret = i915_mmio_setup(dev_priv);
1015 intel_uncore_init(dev_priv);
1017 intel_device_info_init_mmio(dev_priv);
1019 intel_uncore_prune(dev_priv);
1021 intel_uc_init_mmio(dev_priv);
1023 ret = intel_engines_init_mmio(dev_priv);
1027 i915_gem_init_mmio(dev_priv);
1032 intel_uncore_fini(dev_priv);
1034 pci_dev_put(dev_priv->bridge_dev);
1040 * i915_driver_cleanup_mmio - cleanup the setup done in i915_driver_init_mmio()
1041 * @dev_priv: device private
1043 static void i915_driver_cleanup_mmio(struct drm_i915_private *dev_priv)
1045 intel_uncore_fini(dev_priv);
1046 i915_mmio_cleanup(dev_priv);
1047 pci_dev_put(dev_priv->bridge_dev);
1050 static void intel_sanitize_options(struct drm_i915_private *dev_priv)
1053 * i915.enable_ppgtt is read-only, so do an early pass to validate the
1054 * user's requested state against the hardware/driver capabilities. We
1055 * do this now so that we can print out any log messages once rather
1056 * than every time we check intel_enable_ppgtt().
1058 i915_modparams.enable_ppgtt =
1059 intel_sanitize_enable_ppgtt(dev_priv,
1060 i915_modparams.enable_ppgtt);
1061 DRM_DEBUG_DRIVER("ppgtt mode: %i\n", i915_modparams.enable_ppgtt);
1063 intel_gvt_sanitize_options(dev_priv);
1066 static enum dram_rank skl_get_dimm_rank(u8 size, u32 rank)
1069 return I915_DRAM_RANK_INVALID;
1070 if (rank == SKL_DRAM_RANK_SINGLE)
1071 return I915_DRAM_RANK_SINGLE;
1072 else if (rank == SKL_DRAM_RANK_DUAL)
1073 return I915_DRAM_RANK_DUAL;
1075 return I915_DRAM_RANK_INVALID;
1079 skl_is_16gb_dimm(enum dram_rank rank, u8 size, u8 width)
1081 if (rank == I915_DRAM_RANK_SINGLE && width == 8 && size == 16)
1083 else if (rank == I915_DRAM_RANK_DUAL && width == 8 && size == 32)
1085 else if (rank == SKL_DRAM_RANK_SINGLE && width == 16 && size == 8)
1087 else if (rank == SKL_DRAM_RANK_DUAL && width == 16 && size == 16)
1094 skl_dram_get_channel_info(struct dram_channel_info *ch, u32 val)
1097 u32 s_val = val >> SKL_DRAM_S_SHIFT;
1102 tmp_l = val & SKL_DRAM_SIZE_MASK;
1103 tmp_s = s_val & SKL_DRAM_SIZE_MASK;
1105 if (tmp_l == 0 && tmp_s == 0)
1108 ch->l_info.size = tmp_l;
1109 ch->s_info.size = tmp_s;
1111 tmp_l = (val & SKL_DRAM_WIDTH_MASK) >> SKL_DRAM_WIDTH_SHIFT;
1112 tmp_s = (s_val & SKL_DRAM_WIDTH_MASK) >> SKL_DRAM_WIDTH_SHIFT;
1113 ch->l_info.width = (1 << tmp_l) * 8;
1114 ch->s_info.width = (1 << tmp_s) * 8;
1116 tmp_l = val & SKL_DRAM_RANK_MASK;
1117 tmp_s = s_val & SKL_DRAM_RANK_MASK;
1118 ch->l_info.rank = skl_get_dimm_rank(ch->l_info.size, tmp_l);
1119 ch->s_info.rank = skl_get_dimm_rank(ch->s_info.size, tmp_s);
1121 if (ch->l_info.rank == I915_DRAM_RANK_DUAL ||
1122 ch->s_info.rank == I915_DRAM_RANK_DUAL)
1123 ch->rank = I915_DRAM_RANK_DUAL;
1124 else if (ch->l_info.rank == I915_DRAM_RANK_SINGLE &&
1125 ch->s_info.rank == I915_DRAM_RANK_SINGLE)
1126 ch->rank = I915_DRAM_RANK_DUAL;
1128 ch->rank = I915_DRAM_RANK_SINGLE;
1130 ch->is_16gb_dimm = skl_is_16gb_dimm(ch->l_info.rank, ch->l_info.size,
1131 ch->l_info.width) ||
1132 skl_is_16gb_dimm(ch->s_info.rank, ch->s_info.size,
1135 DRM_DEBUG_KMS("(size:width:rank) L(%dGB:X%d:%s) S(%dGB:X%d:%s)\n",
1136 ch->l_info.size, ch->l_info.width,
1137 ch->l_info.rank ? "dual" : "single",
1138 ch->s_info.size, ch->s_info.width,
1139 ch->s_info.rank ? "dual" : "single");
1145 intel_is_dram_symmetric(u32 val_ch0, u32 val_ch1,
1146 struct dram_channel_info *ch0)
1148 return (val_ch0 == val_ch1 &&
1149 (ch0->s_info.size == 0 ||
1150 (ch0->l_info.size == ch0->s_info.size &&
1151 ch0->l_info.width == ch0->s_info.width &&
1152 ch0->l_info.rank == ch0->s_info.rank)));
1156 skl_dram_get_channels_info(struct drm_i915_private *dev_priv)
1158 struct dram_info *dram_info = &dev_priv->dram_info;
1159 struct dram_channel_info ch0, ch1;
1160 u32 val_ch0, val_ch1;
1163 val_ch0 = I915_READ(SKL_MAD_DIMM_CH0_0_0_0_MCHBAR_MCMAIN);
1164 ret = skl_dram_get_channel_info(&ch0, val_ch0);
1166 dram_info->num_channels++;
1168 val_ch1 = I915_READ(SKL_MAD_DIMM_CH1_0_0_0_MCHBAR_MCMAIN);
1169 ret = skl_dram_get_channel_info(&ch1, val_ch1);
1171 dram_info->num_channels++;
1173 if (dram_info->num_channels == 0) {
1174 DRM_INFO("Number of memory channels is zero\n");
1179 * If any of the channel is single rank channel, worst case output
1180 * will be same as if single rank memory, so consider single rank
1183 if (ch0.rank == I915_DRAM_RANK_SINGLE ||
1184 ch1.rank == I915_DRAM_RANK_SINGLE)
1185 dram_info->rank = I915_DRAM_RANK_SINGLE;
1187 dram_info->rank = max(ch0.rank, ch1.rank);
1189 if (dram_info->rank == I915_DRAM_RANK_INVALID) {
1190 DRM_INFO("couldn't get memory rank information\n");
1194 dram_info->is_16gb_dimm = ch0.is_16gb_dimm || ch1.is_16gb_dimm;
1196 dev_priv->dram_info.symmetric_memory = intel_is_dram_symmetric(val_ch0,
1200 DRM_DEBUG_KMS("memory configuration is %sSymmetric memory\n",
1201 dev_priv->dram_info.symmetric_memory ? "" : "not ");
1206 skl_get_dram_info(struct drm_i915_private *dev_priv)
1208 struct dram_info *dram_info = &dev_priv->dram_info;
1209 u32 mem_freq_khz, val;
1212 ret = skl_dram_get_channels_info(dev_priv);
1216 val = I915_READ(SKL_MC_BIOS_DATA_0_0_0_MCHBAR_PCU);
1217 mem_freq_khz = DIV_ROUND_UP((val & SKL_REQ_DATA_MASK) *
1218 SKL_MEMORY_FREQ_MULTIPLIER_HZ, 1000);
1220 dram_info->bandwidth_kbps = dram_info->num_channels *
1223 if (dram_info->bandwidth_kbps == 0) {
1224 DRM_INFO("Couldn't get system memory bandwidth\n");
1228 dram_info->valid = true;
1233 bxt_get_dram_info(struct drm_i915_private *dev_priv)
1235 struct dram_info *dram_info = &dev_priv->dram_info;
1237 u32 mem_freq_khz, val;
1238 u8 num_active_channels;
1241 val = I915_READ(BXT_P_CR_MC_BIOS_REQ_0_0_0);
1242 mem_freq_khz = DIV_ROUND_UP((val & BXT_REQ_DATA_MASK) *
1243 BXT_MEMORY_FREQ_MULTIPLIER_HZ, 1000);
1245 dram_channels = val & BXT_DRAM_CHANNEL_ACTIVE_MASK;
1246 num_active_channels = hweight32(dram_channels);
1248 /* Each active bit represents 4-byte channel */
1249 dram_info->bandwidth_kbps = (mem_freq_khz * num_active_channels * 4);
1251 if (dram_info->bandwidth_kbps == 0) {
1252 DRM_INFO("Couldn't get system memory bandwidth\n");
1257 * Now read each DUNIT8/9/10/11 to check the rank of each dimms.
1259 for (i = BXT_D_CR_DRP0_DUNIT_START; i <= BXT_D_CR_DRP0_DUNIT_END; i++) {
1261 enum dram_rank rank;
1264 val = I915_READ(BXT_D_CR_DRP0_DUNIT(i));
1265 if (val == 0xFFFFFFFF)
1268 dram_info->num_channels++;
1269 tmp = val & BXT_DRAM_RANK_MASK;
1271 if (tmp == BXT_DRAM_RANK_SINGLE)
1272 rank = I915_DRAM_RANK_SINGLE;
1273 else if (tmp == BXT_DRAM_RANK_DUAL)
1274 rank = I915_DRAM_RANK_DUAL;
1276 rank = I915_DRAM_RANK_INVALID;
1278 tmp = val & BXT_DRAM_SIZE_MASK;
1279 if (tmp == BXT_DRAM_SIZE_4GB)
1281 else if (tmp == BXT_DRAM_SIZE_6GB)
1283 else if (tmp == BXT_DRAM_SIZE_8GB)
1285 else if (tmp == BXT_DRAM_SIZE_12GB)
1287 else if (tmp == BXT_DRAM_SIZE_16GB)
1292 tmp = (val & BXT_DRAM_WIDTH_MASK) >> BXT_DRAM_WIDTH_SHIFT;
1293 width = (1 << tmp) * 8;
1294 DRM_DEBUG_KMS("dram size:%dGB width:X%d rank:%s\n", size,
1295 width, rank == I915_DRAM_RANK_SINGLE ? "single" :
1296 rank == I915_DRAM_RANK_DUAL ? "dual" : "unknown");
1299 * If any of the channel is single rank channel,
1300 * worst case output will be same as if single rank
1301 * memory, so consider single rank memory.
1303 if (dram_info->rank == I915_DRAM_RANK_INVALID)
1304 dram_info->rank = rank;
1305 else if (rank == I915_DRAM_RANK_SINGLE)
1306 dram_info->rank = I915_DRAM_RANK_SINGLE;
1309 if (dram_info->rank == I915_DRAM_RANK_INVALID) {
1310 DRM_INFO("couldn't get memory rank information\n");
1314 dram_info->valid = true;
1319 intel_get_dram_info(struct drm_i915_private *dev_priv)
1321 struct dram_info *dram_info = &dev_priv->dram_info;
1322 char bandwidth_str[32];
1325 dram_info->valid = false;
1326 dram_info->rank = I915_DRAM_RANK_INVALID;
1327 dram_info->bandwidth_kbps = 0;
1328 dram_info->num_channels = 0;
1331 * Assume 16Gb DIMMs are present until proven otherwise.
1332 * This is only used for the level 0 watermark latency
1333 * w/a which does not apply to bxt/glk.
1335 dram_info->is_16gb_dimm = !IS_GEN9_LP(dev_priv);
1337 if (INTEL_GEN(dev_priv) < 9 || IS_GEMINILAKE(dev_priv))
1340 /* Need to calculate bandwidth only for Gen9 */
1341 if (IS_BROXTON(dev_priv))
1342 ret = bxt_get_dram_info(dev_priv);
1343 else if (INTEL_GEN(dev_priv) == 9)
1344 ret = skl_get_dram_info(dev_priv);
1346 ret = skl_dram_get_channels_info(dev_priv);
1350 if (dram_info->bandwidth_kbps)
1351 sprintf(bandwidth_str, "%d KBps", dram_info->bandwidth_kbps);
1353 sprintf(bandwidth_str, "unknown");
1354 DRM_DEBUG_KMS("DRAM bandwidth:%s, total-channels: %u\n",
1355 bandwidth_str, dram_info->num_channels);
1356 DRM_DEBUG_KMS("DRAM rank: %s rank 16GB-dimm:%s\n",
1357 (dram_info->rank == I915_DRAM_RANK_DUAL) ?
1358 "dual" : "single", yesno(dram_info->is_16gb_dimm));
1362 * i915_driver_init_hw - setup state requiring device access
1363 * @dev_priv: device private
1365 * Setup state that requires accessing the device, but doesn't require
1366 * exposing the driver via kernel internal or userspace interfaces.
1368 static int i915_driver_init_hw(struct drm_i915_private *dev_priv)
1370 struct pci_dev *pdev = dev_priv->drm.pdev;
1373 if (i915_inject_load_failure())
1376 intel_device_info_runtime_init(mkwrite_device_info(dev_priv));
1378 intel_sanitize_options(dev_priv);
1380 i915_perf_init(dev_priv);
1382 ret = i915_ggtt_probe_hw(dev_priv);
1387 * WARNING: Apparently we must kick fbdev drivers before vgacon,
1388 * otherwise the vga fbdev driver falls over.
1390 ret = i915_kick_out_firmware_fb(dev_priv);
1392 DRM_ERROR("failed to remove conflicting framebuffer drivers\n");
1396 ret = i915_kick_out_vgacon(dev_priv);
1398 DRM_ERROR("failed to remove conflicting VGA console\n");
1402 ret = i915_ggtt_init_hw(dev_priv);
1406 ret = i915_ggtt_enable_hw(dev_priv);
1408 DRM_ERROR("failed to enable GGTT\n");
1412 pci_set_master(pdev);
1414 /* overlay on gen2 is broken and can't address above 1G */
1415 if (IS_GEN2(dev_priv)) {
1416 ret = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(30));
1418 DRM_ERROR("failed to set DMA mask\n");
1424 /* 965GM sometimes incorrectly writes to hardware status page (HWS)
1425 * using 32bit addressing, overwriting memory if HWS is located
1428 * The documentation also mentions an issue with undefined
1429 * behaviour if any general state is accessed within a page above 4GB,
1430 * which also needs to be handled carefully.
1432 if (IS_I965G(dev_priv) || IS_I965GM(dev_priv)) {
1433 ret = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
1436 DRM_ERROR("failed to set DMA mask\n");
1442 pm_qos_add_request(&dev_priv->pm_qos, PM_QOS_CPU_DMA_LATENCY,
1443 PM_QOS_DEFAULT_VALUE);
1445 intel_uncore_sanitize(dev_priv);
1447 i915_gem_load_init_fences(dev_priv);
1449 /* On the 945G/GM, the chipset reports the MSI capability on the
1450 * integrated graphics even though the support isn't actually there
1451 * according to the published specs. It doesn't appear to function
1452 * correctly in testing on 945G.
1453 * This may be a side effect of MSI having been made available for PEG
1454 * and the registers being closely associated.
1456 * According to chipset errata, on the 965GM, MSI interrupts may
1457 * be lost or delayed, and was defeatured. MSI interrupts seem to
1458 * get lost on g4x as well, and interrupt delivery seems to stay
1459 * properly dead afterwards. So we'll just disable them for all
1460 * pre-gen5 chipsets.
1462 * dp aux and gmbus irq on gen4 seems to be able to generate legacy
1463 * interrupts even when in MSI mode. This results in spurious
1464 * interrupt warnings if the legacy irq no. is shared with another
1465 * device. The kernel then disables that interrupt source and so
1466 * prevents the other device from working properly.
1468 if (INTEL_GEN(dev_priv) >= 5) {
1469 if (pci_enable_msi(pdev) < 0)
1470 DRM_DEBUG_DRIVER("can't enable MSI");
1473 ret = intel_gvt_init(dev_priv);
1477 intel_opregion_setup(dev_priv);
1479 * Fill the dram structure to get the system raw bandwidth and
1480 * dram info. This will be used for memory latency calculation.
1482 intel_get_dram_info(dev_priv);
1488 if (pdev->msi_enabled)
1489 pci_disable_msi(pdev);
1490 pm_qos_remove_request(&dev_priv->pm_qos);
1492 i915_ggtt_cleanup_hw(dev_priv);
1494 i915_perf_fini(dev_priv);
1499 * i915_driver_cleanup_hw - cleanup the setup done in i915_driver_init_hw()
1500 * @dev_priv: device private
1502 static void i915_driver_cleanup_hw(struct drm_i915_private *dev_priv)
1504 struct pci_dev *pdev = dev_priv->drm.pdev;
1506 i915_perf_fini(dev_priv);
1508 if (pdev->msi_enabled)
1509 pci_disable_msi(pdev);
1511 pm_qos_remove_request(&dev_priv->pm_qos);
1512 i915_ggtt_cleanup_hw(dev_priv);
1516 * i915_driver_register - register the driver with the rest of the system
1517 * @dev_priv: device private
1519 * Perform any steps necessary to make the driver available via kernel
1520 * internal or userspace interfaces.
1522 static void i915_driver_register(struct drm_i915_private *dev_priv)
1524 struct drm_device *dev = &dev_priv->drm;
1526 i915_gem_shrinker_register(dev_priv);
1527 i915_pmu_register(dev_priv);
1530 * Notify a valid surface after modesetting,
1531 * when running inside a VM.
1533 if (intel_vgpu_active(dev_priv))
1534 I915_WRITE(vgtif_reg(display_ready), VGT_DRV_DISPLAY_READY);
1536 /* Reveal our presence to userspace */
1537 if (drm_dev_register(dev, 0) == 0) {
1538 i915_debugfs_register(dev_priv);
1539 i915_setup_sysfs(dev_priv);
1541 /* Depends on sysfs having been initialized */
1542 i915_perf_register(dev_priv);
1544 DRM_ERROR("Failed to register driver for userspace access!\n");
1546 if (INTEL_INFO(dev_priv)->num_pipes) {
1547 /* Must be done after probing outputs */
1548 intel_opregion_register(dev_priv);
1549 acpi_video_register();
1552 if (IS_GEN5(dev_priv))
1553 intel_gpu_ips_init(dev_priv);
1555 intel_audio_init(dev_priv);
1558 * Some ports require correctly set-up hpd registers for detection to
1559 * work properly (leading to ghost connected connector status), e.g. VGA
1560 * on gm45. Hence we can only set up the initial fbdev config after hpd
1561 * irqs are fully enabled. We do it last so that the async config
1562 * cannot run before the connectors are registered.
1564 intel_fbdev_initial_config_async(dev);
1567 * We need to coordinate the hotplugs with the asynchronous fbdev
1568 * configuration, for which we use the fbdev->async_cookie.
1570 if (INTEL_INFO(dev_priv)->num_pipes)
1571 drm_kms_helper_poll_init(dev);
1573 intel_power_domains_enable(dev_priv);
1574 intel_runtime_pm_enable(dev_priv);
1578 * i915_driver_unregister - cleanup the registration done in i915_driver_regiser()
1579 * @dev_priv: device private
1581 static void i915_driver_unregister(struct drm_i915_private *dev_priv)
1583 intel_runtime_pm_disable(dev_priv);
1584 intel_power_domains_disable(dev_priv);
1586 intel_fbdev_unregister(dev_priv);
1587 intel_audio_deinit(dev_priv);
1590 * After flushing the fbdev (incl. a late async config which will
1591 * have delayed queuing of a hotplug event), then flush the hotplug
1594 drm_kms_helper_poll_fini(&dev_priv->drm);
1596 intel_gpu_ips_teardown();
1597 acpi_video_unregister();
1598 intel_opregion_unregister(dev_priv);
1600 i915_perf_unregister(dev_priv);
1601 i915_pmu_unregister(dev_priv);
1603 i915_teardown_sysfs(dev_priv);
1604 drm_dev_unregister(&dev_priv->drm);
1606 i915_gem_shrinker_unregister(dev_priv);
1609 static void i915_welcome_messages(struct drm_i915_private *dev_priv)
1611 if (drm_debug & DRM_UT_DRIVER) {
1612 struct drm_printer p = drm_debug_printer("i915 device info:");
1614 intel_device_info_dump(&dev_priv->info, &p);
1615 intel_device_info_dump_runtime(&dev_priv->info, &p);
1618 if (IS_ENABLED(CONFIG_DRM_I915_DEBUG))
1619 DRM_INFO("DRM_I915_DEBUG enabled\n");
1620 if (IS_ENABLED(CONFIG_DRM_I915_DEBUG_GEM))
1621 DRM_INFO("DRM_I915_DEBUG_GEM enabled\n");
1622 if (IS_ENABLED(CONFIG_DRM_I915_DEBUG_RUNTIME_PM))
1623 DRM_INFO("DRM_I915_DEBUG_RUNTIME_PM enabled\n");
1626 static struct drm_i915_private *
1627 i915_driver_create(struct pci_dev *pdev, const struct pci_device_id *ent)
1629 const struct intel_device_info *match_info =
1630 (struct intel_device_info *)ent->driver_data;
1631 struct intel_device_info *device_info;
1632 struct drm_i915_private *i915;
1634 i915 = kzalloc(sizeof(*i915), GFP_KERNEL);
1638 if (drm_dev_init(&i915->drm, &driver, &pdev->dev)) {
1643 i915->drm.pdev = pdev;
1644 i915->drm.dev_private = i915;
1645 pci_set_drvdata(pdev, &i915->drm);
1647 /* Setup the write-once "constant" device info */
1648 device_info = mkwrite_device_info(i915);
1649 memcpy(device_info, match_info, sizeof(*device_info));
1650 device_info->device_id = pdev->device;
1652 BUILD_BUG_ON(INTEL_MAX_PLATFORMS >
1653 sizeof(device_info->platform_mask) * BITS_PER_BYTE);
1654 BUG_ON(device_info->gen > sizeof(device_info->gen_mask) * BITS_PER_BYTE);
1659 static void i915_driver_destroy(struct drm_i915_private *i915)
1661 struct pci_dev *pdev = i915->drm.pdev;
1663 drm_dev_fini(&i915->drm);
1666 /* And make sure we never chase our dangling pointer from pci_dev */
1667 pci_set_drvdata(pdev, NULL);
1671 * i915_driver_load - setup chip and create an initial config
1673 * @ent: matching PCI ID entry
1675 * The driver load routine has to do several things:
1676 * - drive output discovery via intel_modeset_init()
1677 * - initialize the memory manager
1678 * - allocate initial config memory
1679 * - setup the DRM framebuffer with the allocated memory
1681 int i915_driver_load(struct pci_dev *pdev, const struct pci_device_id *ent)
1683 const struct intel_device_info *match_info =
1684 (struct intel_device_info *)ent->driver_data;
1685 struct drm_i915_private *dev_priv;
1688 dev_priv = i915_driver_create(pdev, ent);
1692 /* Disable nuclear pageflip by default on pre-ILK */
1693 if (!i915_modparams.nuclear_pageflip && match_info->gen < 5)
1694 dev_priv->drm.driver_features &= ~DRIVER_ATOMIC;
1696 ret = pci_enable_device(pdev);
1700 ret = i915_driver_init_early(dev_priv);
1702 goto out_pci_disable;
1704 disable_rpm_wakeref_asserts(dev_priv);
1706 ret = i915_driver_init_mmio(dev_priv);
1708 goto out_runtime_pm_put;
1710 ret = i915_driver_init_hw(dev_priv);
1712 goto out_cleanup_mmio;
1715 * TODO: move the vblank init and parts of modeset init steps into one
1716 * of the i915_driver_init_/i915_driver_register functions according
1717 * to the role/effect of the given init step.
1719 if (INTEL_INFO(dev_priv)->num_pipes) {
1720 ret = drm_vblank_init(&dev_priv->drm,
1721 INTEL_INFO(dev_priv)->num_pipes);
1723 goto out_cleanup_hw;
1726 ret = i915_load_modeset_init(&dev_priv->drm);
1728 goto out_cleanup_hw;
1730 i915_driver_register(dev_priv);
1732 intel_init_ipc(dev_priv);
1734 enable_rpm_wakeref_asserts(dev_priv);
1736 i915_welcome_messages(dev_priv);
1741 i915_driver_cleanup_hw(dev_priv);
1743 i915_driver_cleanup_mmio(dev_priv);
1745 enable_rpm_wakeref_asserts(dev_priv);
1746 i915_driver_cleanup_early(dev_priv);
1748 pci_disable_device(pdev);
1750 i915_load_error(dev_priv, "Device initialization failed (%d)\n", ret);
1751 i915_driver_destroy(dev_priv);
1755 void i915_driver_unload(struct drm_device *dev)
1757 struct drm_i915_private *dev_priv = to_i915(dev);
1758 struct pci_dev *pdev = dev_priv->drm.pdev;
1760 disable_rpm_wakeref_asserts(dev_priv);
1762 i915_driver_unregister(dev_priv);
1764 if (i915_gem_suspend(dev_priv))
1765 DRM_ERROR("failed to idle hardware; continuing to unload!\n");
1767 drm_atomic_helper_shutdown(dev);
1769 intel_gvt_cleanup(dev_priv);
1771 intel_modeset_cleanup(dev);
1773 intel_bios_cleanup(dev_priv);
1775 vga_switcheroo_unregister_client(pdev);
1776 vga_client_register(pdev, NULL, NULL, NULL);
1778 intel_csr_ucode_fini(dev_priv);
1780 /* Free error state after interrupts are fully disabled. */
1781 cancel_delayed_work_sync(&dev_priv->gpu_error.hangcheck_work);
1782 i915_reset_error_state(dev_priv);
1784 i915_gem_fini(dev_priv);
1785 intel_fbc_cleanup_cfb(dev_priv);
1787 intel_power_domains_fini_hw(dev_priv);
1789 i915_driver_cleanup_hw(dev_priv);
1790 i915_driver_cleanup_mmio(dev_priv);
1792 enable_rpm_wakeref_asserts(dev_priv);
1794 WARN_ON(atomic_read(&dev_priv->runtime_pm.wakeref_count));
1797 static void i915_driver_release(struct drm_device *dev)
1799 struct drm_i915_private *dev_priv = to_i915(dev);
1801 i915_driver_cleanup_early(dev_priv);
1802 i915_driver_destroy(dev_priv);
1805 static int i915_driver_open(struct drm_device *dev, struct drm_file *file)
1807 struct drm_i915_private *i915 = to_i915(dev);
1810 ret = i915_gem_open(i915, file);
1818 * i915_driver_lastclose - clean up after all DRM clients have exited
1821 * Take care of cleaning up after all DRM clients have exited. In the
1822 * mode setting case, we want to restore the kernel's initial mode (just
1823 * in case the last client left us in a bad state).
1825 * Additionally, in the non-mode setting case, we'll tear down the GTT
1826 * and DMA structures, since the kernel won't be using them, and clea
1829 static void i915_driver_lastclose(struct drm_device *dev)
1831 intel_fbdev_restore_mode(dev);
1832 vga_switcheroo_process_delayed_switch();
1835 static void i915_driver_postclose(struct drm_device *dev, struct drm_file *file)
1837 struct drm_i915_file_private *file_priv = file->driver_priv;
1839 mutex_lock(&dev->struct_mutex);
1840 i915_gem_context_close(file);
1841 i915_gem_release(dev, file);
1842 mutex_unlock(&dev->struct_mutex);
1847 static void intel_suspend_encoders(struct drm_i915_private *dev_priv)
1849 struct drm_device *dev = &dev_priv->drm;
1850 struct intel_encoder *encoder;
1852 drm_modeset_lock_all(dev);
1853 for_each_intel_encoder(dev, encoder)
1854 if (encoder->suspend)
1855 encoder->suspend(encoder);
1856 drm_modeset_unlock_all(dev);
1859 static int vlv_resume_prepare(struct drm_i915_private *dev_priv,
1861 static int vlv_suspend_complete(struct drm_i915_private *dev_priv);
1863 static bool suspend_to_idle(struct drm_i915_private *dev_priv)
1865 #if IS_ENABLED(CONFIG_ACPI_SLEEP)
1866 if (acpi_target_system_state() < ACPI_STATE_S3)
1872 static int i915_drm_prepare(struct drm_device *dev)
1874 struct drm_i915_private *i915 = to_i915(dev);
1878 * NB intel_display_suspend() may issue new requests after we've
1879 * ostensibly marked the GPU as ready-to-sleep here. We need to
1880 * split out that work and pull it forward so that after point,
1881 * the GPU is not woken again.
1883 err = i915_gem_suspend(i915);
1885 dev_err(&i915->drm.pdev->dev,
1886 "GEM idle failed, suspend/resume might fail\n");
1891 static int i915_drm_suspend(struct drm_device *dev)
1893 struct drm_i915_private *dev_priv = to_i915(dev);
1894 struct pci_dev *pdev = dev_priv->drm.pdev;
1895 pci_power_t opregion_target_state;
1897 disable_rpm_wakeref_asserts(dev_priv);
1899 /* We do a lot of poking in a lot of registers, make sure they work
1901 intel_power_domains_disable(dev_priv);
1903 drm_kms_helper_poll_disable(dev);
1905 pci_save_state(pdev);
1907 intel_display_suspend(dev);
1909 intel_dp_mst_suspend(dev_priv);
1911 intel_runtime_pm_disable_interrupts(dev_priv);
1912 intel_hpd_cancel_work(dev_priv);
1914 intel_suspend_encoders(dev_priv);
1916 intel_suspend_hw(dev_priv);
1918 i915_gem_suspend_gtt_mappings(dev_priv);
1920 i915_save_state(dev_priv);
1922 opregion_target_state = suspend_to_idle(dev_priv) ? PCI_D1 : PCI_D3cold;
1923 intel_opregion_notify_adapter(dev_priv, opregion_target_state);
1925 intel_opregion_unregister(dev_priv);
1927 intel_fbdev_set_suspend(dev, FBINFO_STATE_SUSPENDED, true);
1929 dev_priv->suspend_count++;
1931 intel_csr_ucode_suspend(dev_priv);
1933 enable_rpm_wakeref_asserts(dev_priv);
1938 static enum i915_drm_suspend_mode
1939 get_suspend_mode(struct drm_i915_private *dev_priv, bool hibernate)
1942 return I915_DRM_SUSPEND_HIBERNATE;
1944 if (suspend_to_idle(dev_priv))
1945 return I915_DRM_SUSPEND_IDLE;
1947 return I915_DRM_SUSPEND_MEM;
1950 static int i915_drm_suspend_late(struct drm_device *dev, bool hibernation)
1952 struct drm_i915_private *dev_priv = to_i915(dev);
1953 struct pci_dev *pdev = dev_priv->drm.pdev;
1956 disable_rpm_wakeref_asserts(dev_priv);
1958 i915_gem_suspend_late(dev_priv);
1960 intel_uncore_suspend(dev_priv);
1962 intel_power_domains_suspend(dev_priv,
1963 get_suspend_mode(dev_priv, hibernation));
1966 if (IS_GEN9_LP(dev_priv))
1967 bxt_enable_dc9(dev_priv);
1968 else if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv))
1969 hsw_enable_pc8(dev_priv);
1970 else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
1971 ret = vlv_suspend_complete(dev_priv);
1974 DRM_ERROR("Suspend complete failed: %d\n", ret);
1975 intel_power_domains_resume(dev_priv);
1980 pci_disable_device(pdev);
1982 * During hibernation on some platforms the BIOS may try to access
1983 * the device even though it's already in D3 and hang the machine. So
1984 * leave the device in D0 on those platforms and hope the BIOS will
1985 * power down the device properly. The issue was seen on multiple old
1986 * GENs with different BIOS vendors, so having an explicit blacklist
1987 * is inpractical; apply the workaround on everything pre GEN6. The
1988 * platforms where the issue was seen:
1989 * Lenovo Thinkpad X301, X61s, X60, T60, X41
1993 if (!(hibernation && INTEL_GEN(dev_priv) < 6))
1994 pci_set_power_state(pdev, PCI_D3hot);
1997 enable_rpm_wakeref_asserts(dev_priv);
2002 static int i915_suspend_switcheroo(struct drm_device *dev, pm_message_t state)
2007 DRM_ERROR("dev: %p\n", dev);
2008 DRM_ERROR("DRM not initialized, aborting suspend.\n");
2012 if (WARN_ON_ONCE(state.event != PM_EVENT_SUSPEND &&
2013 state.event != PM_EVENT_FREEZE))
2016 if (dev->switch_power_state == DRM_SWITCH_POWER_OFF)
2019 error = i915_drm_suspend(dev);
2023 return i915_drm_suspend_late(dev, false);
2026 static int i915_drm_resume(struct drm_device *dev)
2028 struct drm_i915_private *dev_priv = to_i915(dev);
2031 disable_rpm_wakeref_asserts(dev_priv);
2032 intel_sanitize_gt_powersave(dev_priv);
2034 i915_gem_sanitize(dev_priv);
2036 ret = i915_ggtt_enable_hw(dev_priv);
2038 DRM_ERROR("failed to re-enable GGTT\n");
2040 intel_csr_ucode_resume(dev_priv);
2042 i915_restore_state(dev_priv);
2043 intel_pps_unlock_regs_wa(dev_priv);
2044 intel_opregion_setup(dev_priv);
2046 intel_init_pch_refclk(dev_priv);
2049 * Interrupts have to be enabled before any batches are run. If not the
2050 * GPU will hang. i915_gem_init_hw() will initiate batches to
2051 * update/restore the context.
2053 * drm_mode_config_reset() needs AUX interrupts.
2055 * Modeset enabling in intel_modeset_init_hw() also needs working
2058 intel_runtime_pm_enable_interrupts(dev_priv);
2060 drm_mode_config_reset(dev);
2062 i915_gem_resume(dev_priv);
2064 intel_modeset_init_hw(dev);
2065 intel_init_clock_gating(dev_priv);
2067 spin_lock_irq(&dev_priv->irq_lock);
2068 if (dev_priv->display.hpd_irq_setup)
2069 dev_priv->display.hpd_irq_setup(dev_priv);
2070 spin_unlock_irq(&dev_priv->irq_lock);
2072 intel_dp_mst_resume(dev_priv);
2074 intel_display_resume(dev);
2076 drm_kms_helper_poll_enable(dev);
2079 * ... but also need to make sure that hotplug processing
2080 * doesn't cause havoc. Like in the driver load code we don't
2081 * bother with the tiny race here where we might lose hotplug
2084 intel_hpd_init(dev_priv);
2086 intel_opregion_register(dev_priv);
2088 intel_fbdev_set_suspend(dev, FBINFO_STATE_RUNNING, false);
2090 intel_opregion_notify_adapter(dev_priv, PCI_D0);
2092 intel_power_domains_enable(dev_priv);
2094 enable_rpm_wakeref_asserts(dev_priv);
2099 static int i915_drm_resume_early(struct drm_device *dev)
2101 struct drm_i915_private *dev_priv = to_i915(dev);
2102 struct pci_dev *pdev = dev_priv->drm.pdev;
2106 * We have a resume ordering issue with the snd-hda driver also
2107 * requiring our device to be power up. Due to the lack of a
2108 * parent/child relationship we currently solve this with an early
2111 * FIXME: This should be solved with a special hdmi sink device or
2112 * similar so that power domains can be employed.
2116 * Note that we need to set the power state explicitly, since we
2117 * powered off the device during freeze and the PCI core won't power
2118 * it back up for us during thaw. Powering off the device during
2119 * freeze is not a hard requirement though, and during the
2120 * suspend/resume phases the PCI core makes sure we get here with the
2121 * device powered on. So in case we change our freeze logic and keep
2122 * the device powered we can also remove the following set power state
2125 ret = pci_set_power_state(pdev, PCI_D0);
2127 DRM_ERROR("failed to set PCI D0 power state (%d)\n", ret);
2132 * Note that pci_enable_device() first enables any parent bridge
2133 * device and only then sets the power state for this device. The
2134 * bridge enabling is a nop though, since bridge devices are resumed
2135 * first. The order of enabling power and enabling the device is
2136 * imposed by the PCI core as described above, so here we preserve the
2137 * same order for the freeze/thaw phases.
2139 * TODO: eventually we should remove pci_disable_device() /
2140 * pci_enable_enable_device() from suspend/resume. Due to how they
2141 * depend on the device enable refcount we can't anyway depend on them
2142 * disabling/enabling the device.
2144 if (pci_enable_device(pdev))
2147 pci_set_master(pdev);
2149 disable_rpm_wakeref_asserts(dev_priv);
2151 if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
2152 ret = vlv_resume_prepare(dev_priv, false);
2154 DRM_ERROR("Resume prepare failed: %d, continuing anyway\n",
2157 intel_uncore_resume_early(dev_priv);
2159 if (IS_GEN9_LP(dev_priv)) {
2160 gen9_sanitize_dc_state(dev_priv);
2161 bxt_disable_dc9(dev_priv);
2162 } else if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv)) {
2163 hsw_disable_pc8(dev_priv);
2166 intel_uncore_sanitize(dev_priv);
2168 intel_power_domains_resume(dev_priv);
2170 intel_engines_sanitize(dev_priv);
2172 enable_rpm_wakeref_asserts(dev_priv);
2177 static int i915_resume_switcheroo(struct drm_device *dev)
2181 if (dev->switch_power_state == DRM_SWITCH_POWER_OFF)
2184 ret = i915_drm_resume_early(dev);
2188 return i915_drm_resume(dev);
2192 * i915_reset - reset chip after a hang
2193 * @i915: #drm_i915_private to reset
2194 * @stalled_mask: mask of the stalled engines with the guilty requests
2195 * @reason: user error message for why we are resetting
2197 * Reset the chip. Useful if a hang is detected. Marks the device as wedged
2200 * Caller must hold the struct_mutex.
2202 * Procedure is fairly simple:
2203 * - reset the chip using the reset reg
2204 * - re-init context state
2205 * - re-init hardware status page
2206 * - re-init ring buffer
2207 * - re-init interrupt state
2210 void i915_reset(struct drm_i915_private *i915,
2211 unsigned int stalled_mask,
2214 struct i915_gpu_error *error = &i915->gpu_error;
2218 GEM_TRACE("flags=%lx\n", error->flags);
2221 lockdep_assert_held(&i915->drm.struct_mutex);
2222 GEM_BUG_ON(!test_bit(I915_RESET_BACKOFF, &error->flags));
2224 if (!test_bit(I915_RESET_HANDOFF, &error->flags))
2227 /* Clear any previous failed attempts at recovery. Time to try again. */
2228 if (!i915_gem_unset_wedged(i915))
2232 dev_notice(i915->drm.dev, "Resetting chip for %s\n", reason);
2233 error->reset_count++;
2235 ret = i915_gem_reset_prepare(i915);
2237 dev_err(i915->drm.dev, "GPU recovery failed\n");
2241 if (!intel_has_gpu_reset(i915)) {
2242 if (i915_modparams.reset)
2243 dev_err(i915->drm.dev, "GPU reset not supported\n");
2245 DRM_DEBUG_DRIVER("GPU reset disabled\n");
2249 for (i = 0; i < 3; i++) {
2250 ret = intel_gpu_reset(i915, ALL_ENGINES);
2257 dev_err(i915->drm.dev, "Failed to reset chip\n");
2261 /* Ok, now get things going again... */
2264 * Everything depends on having the GTT running, so we need to start
2267 ret = i915_ggtt_enable_hw(i915);
2269 DRM_ERROR("Failed to re-enable GGTT following reset (%d)\n",
2274 i915_gem_reset(i915, stalled_mask);
2275 intel_overlay_reset(i915);
2278 * Next we need to restore the context, but we don't use those
2281 * Ring buffer needs to be re-initialized in the KMS case, or if X
2282 * was running at the time of the reset (i.e. we weren't VT
2285 ret = i915_gem_init_hw(i915);
2287 DRM_ERROR("Failed to initialise HW following reset (%d)\n",
2292 i915_queue_hangcheck(i915);
2295 i915_gem_reset_finish(i915);
2297 clear_bit(I915_RESET_HANDOFF, &error->flags);
2298 wake_up_bit(&error->flags, I915_RESET_HANDOFF);
2303 * History tells us that if we cannot reset the GPU now, we
2304 * never will. This then impacts everything that is run
2305 * subsequently. On failing the reset, we mark the driver
2306 * as wedged, preventing further execution on the GPU.
2307 * We also want to go one step further and add a taint to the
2308 * kernel so that any subsequent faults can be traced back to
2309 * this failure. This is important for CI, where if the
2310 * GPU/driver fails we would like to reboot and restart testing
2311 * rather than continue on into oblivion. For everyone else,
2312 * the system should still plod along, but they have been warned!
2314 add_taint(TAINT_WARN, LOCKDEP_STILL_OK);
2316 i915_gem_set_wedged(i915);
2317 i915_retire_requests(i915);
2321 static inline int intel_gt_reset_engine(struct drm_i915_private *dev_priv,
2322 struct intel_engine_cs *engine)
2324 return intel_gpu_reset(dev_priv, intel_engine_flag(engine));
2328 * i915_reset_engine - reset GPU engine to recover from a hang
2329 * @engine: engine to reset
2330 * @msg: reason for GPU reset; or NULL for no dev_notice()
2332 * Reset a specific GPU engine. Useful if a hang is detected.
2333 * Returns zero on successful reset or otherwise an error code.
2336 * - identifies the request that caused the hang and it is dropped
2337 * - reset engine (which will force the engine to idle)
2338 * - re-init/configure engine
2340 int i915_reset_engine(struct intel_engine_cs *engine, const char *msg)
2342 struct i915_gpu_error *error = &engine->i915->gpu_error;
2343 struct i915_request *active_request;
2346 GEM_TRACE("%s flags=%lx\n", engine->name, error->flags);
2347 GEM_BUG_ON(!test_bit(I915_RESET_ENGINE + engine->id, &error->flags));
2349 active_request = i915_gem_reset_prepare_engine(engine);
2350 if (IS_ERR_OR_NULL(active_request)) {
2351 /* Either the previous reset failed, or we pardon the reset. */
2352 ret = PTR_ERR(active_request);
2357 dev_notice(engine->i915->drm.dev,
2358 "Resetting %s for %s\n", engine->name, msg);
2359 error->reset_engine_count[engine->id]++;
2361 if (!engine->i915->guc.execbuf_client)
2362 ret = intel_gt_reset_engine(engine->i915, engine);
2364 ret = intel_guc_reset_engine(&engine->i915->guc, engine);
2366 /* If we fail here, we expect to fallback to a global reset */
2367 DRM_DEBUG_DRIVER("%sFailed to reset %s, ret=%d\n",
2368 engine->i915->guc.execbuf_client ? "GuC " : "",
2374 * The request that caused the hang is stuck on elsp, we know the
2375 * active request and can drop it, adjust head to skip the offending
2376 * request to resume executing remaining requests in the queue.
2378 i915_gem_reset_engine(engine, active_request, true);
2381 * The engine and its registers (and workarounds in case of render)
2382 * have been reset to their default values. Follow the init_ring
2383 * process to program RING_MODE, HWSP and re-enable submission.
2385 ret = engine->init_hw(engine);
2390 intel_engine_cancel_stop_cs(engine);
2391 i915_gem_reset_finish_engine(engine);
2395 static int i915_pm_prepare(struct device *kdev)
2397 struct pci_dev *pdev = to_pci_dev(kdev);
2398 struct drm_device *dev = pci_get_drvdata(pdev);
2401 dev_err(kdev, "DRM not initialized, aborting suspend.\n");
2405 if (dev->switch_power_state == DRM_SWITCH_POWER_OFF)
2408 return i915_drm_prepare(dev);
2411 static int i915_pm_suspend(struct device *kdev)
2413 struct pci_dev *pdev = to_pci_dev(kdev);
2414 struct drm_device *dev = pci_get_drvdata(pdev);
2417 dev_err(kdev, "DRM not initialized, aborting suspend.\n");
2421 if (dev->switch_power_state == DRM_SWITCH_POWER_OFF)
2424 return i915_drm_suspend(dev);
2427 static int i915_pm_suspend_late(struct device *kdev)
2429 struct drm_device *dev = &kdev_to_i915(kdev)->drm;
2432 * We have a suspend ordering issue with the snd-hda driver also
2433 * requiring our device to be power up. Due to the lack of a
2434 * parent/child relationship we currently solve this with an late
2437 * FIXME: This should be solved with a special hdmi sink device or
2438 * similar so that power domains can be employed.
2440 if (dev->switch_power_state == DRM_SWITCH_POWER_OFF)
2443 return i915_drm_suspend_late(dev, false);
2446 static int i915_pm_poweroff_late(struct device *kdev)
2448 struct drm_device *dev = &kdev_to_i915(kdev)->drm;
2450 if (dev->switch_power_state == DRM_SWITCH_POWER_OFF)
2453 return i915_drm_suspend_late(dev, true);
2456 static int i915_pm_resume_early(struct device *kdev)
2458 struct drm_device *dev = &kdev_to_i915(kdev)->drm;
2460 if (dev->switch_power_state == DRM_SWITCH_POWER_OFF)
2463 return i915_drm_resume_early(dev);
2466 static int i915_pm_resume(struct device *kdev)
2468 struct drm_device *dev = &kdev_to_i915(kdev)->drm;
2470 if (dev->switch_power_state == DRM_SWITCH_POWER_OFF)
2473 return i915_drm_resume(dev);
2476 /* freeze: before creating the hibernation_image */
2477 static int i915_pm_freeze(struct device *kdev)
2479 struct drm_device *dev = &kdev_to_i915(kdev)->drm;
2482 if (dev->switch_power_state != DRM_SWITCH_POWER_OFF) {
2483 ret = i915_drm_suspend(dev);
2488 ret = i915_gem_freeze(kdev_to_i915(kdev));
2495 static int i915_pm_freeze_late(struct device *kdev)
2497 struct drm_device *dev = &kdev_to_i915(kdev)->drm;
2500 if (dev->switch_power_state != DRM_SWITCH_POWER_OFF) {
2501 ret = i915_drm_suspend_late(dev, true);
2506 ret = i915_gem_freeze_late(kdev_to_i915(kdev));
2513 /* thaw: called after creating the hibernation image, but before turning off. */
2514 static int i915_pm_thaw_early(struct device *kdev)
2516 return i915_pm_resume_early(kdev);
2519 static int i915_pm_thaw(struct device *kdev)
2521 return i915_pm_resume(kdev);
2524 /* restore: called after loading the hibernation image. */
2525 static int i915_pm_restore_early(struct device *kdev)
2527 return i915_pm_resume_early(kdev);
2530 static int i915_pm_restore(struct device *kdev)
2532 return i915_pm_resume(kdev);
2536 * Save all Gunit registers that may be lost after a D3 and a subsequent
2537 * S0i[R123] transition. The list of registers needing a save/restore is
2538 * defined in the VLV2_S0IXRegs document. This documents marks all Gunit
2539 * registers in the following way:
2540 * - Driver: saved/restored by the driver
2541 * - Punit : saved/restored by the Punit firmware
2542 * - No, w/o marking: no need to save/restore, since the register is R/O or
2543 * used internally by the HW in a way that doesn't depend
2544 * keeping the content across a suspend/resume.
2545 * - Debug : used for debugging
2547 * We save/restore all registers marked with 'Driver', with the following
2549 * - Registers out of use, including also registers marked with 'Debug'.
2550 * These have no effect on the driver's operation, so we don't save/restore
2551 * them to reduce the overhead.
2552 * - Registers that are fully setup by an initialization function called from
2553 * the resume path. For example many clock gating and RPS/RC6 registers.
2554 * - Registers that provide the right functionality with their reset defaults.
2556 * TODO: Except for registers that based on the above 3 criteria can be safely
2557 * ignored, we save/restore all others, practically treating the HW context as
2558 * a black-box for the driver. Further investigation is needed to reduce the
2559 * saved/restored registers even further, by following the same 3 criteria.
2561 static void vlv_save_gunit_s0ix_state(struct drm_i915_private *dev_priv)
2563 struct vlv_s0ix_state *s = &dev_priv->vlv_s0ix_state;
2566 /* GAM 0x4000-0x4770 */
2567 s->wr_watermark = I915_READ(GEN7_WR_WATERMARK);
2568 s->gfx_prio_ctrl = I915_READ(GEN7_GFX_PRIO_CTRL);
2569 s->arb_mode = I915_READ(ARB_MODE);
2570 s->gfx_pend_tlb0 = I915_READ(GEN7_GFX_PEND_TLB0);
2571 s->gfx_pend_tlb1 = I915_READ(GEN7_GFX_PEND_TLB1);
2573 for (i = 0; i < ARRAY_SIZE(s->lra_limits); i++)
2574 s->lra_limits[i] = I915_READ(GEN7_LRA_LIMITS(i));
2576 s->media_max_req_count = I915_READ(GEN7_MEDIA_MAX_REQ_COUNT);
2577 s->gfx_max_req_count = I915_READ(GEN7_GFX_MAX_REQ_COUNT);
2579 s->render_hwsp = I915_READ(RENDER_HWS_PGA_GEN7);
2580 s->ecochk = I915_READ(GAM_ECOCHK);
2581 s->bsd_hwsp = I915_READ(BSD_HWS_PGA_GEN7);
2582 s->blt_hwsp = I915_READ(BLT_HWS_PGA_GEN7);
2584 s->tlb_rd_addr = I915_READ(GEN7_TLB_RD_ADDR);
2586 /* MBC 0x9024-0x91D0, 0x8500 */
2587 s->g3dctl = I915_READ(VLV_G3DCTL);
2588 s->gsckgctl = I915_READ(VLV_GSCKGCTL);
2589 s->mbctl = I915_READ(GEN6_MBCTL);
2591 /* GCP 0x9400-0x9424, 0x8100-0x810C */
2592 s->ucgctl1 = I915_READ(GEN6_UCGCTL1);
2593 s->ucgctl3 = I915_READ(GEN6_UCGCTL3);
2594 s->rcgctl1 = I915_READ(GEN6_RCGCTL1);
2595 s->rcgctl2 = I915_READ(GEN6_RCGCTL2);
2596 s->rstctl = I915_READ(GEN6_RSTCTL);
2597 s->misccpctl = I915_READ(GEN7_MISCCPCTL);
2599 /* GPM 0xA000-0xAA84, 0x8000-0x80FC */
2600 s->gfxpause = I915_READ(GEN6_GFXPAUSE);
2601 s->rpdeuhwtc = I915_READ(GEN6_RPDEUHWTC);
2602 s->rpdeuc = I915_READ(GEN6_RPDEUC);
2603 s->ecobus = I915_READ(ECOBUS);
2604 s->pwrdwnupctl = I915_READ(VLV_PWRDWNUPCTL);
2605 s->rp_down_timeout = I915_READ(GEN6_RP_DOWN_TIMEOUT);
2606 s->rp_deucsw = I915_READ(GEN6_RPDEUCSW);
2607 s->rcubmabdtmr = I915_READ(GEN6_RCUBMABDTMR);
2608 s->rcedata = I915_READ(VLV_RCEDATA);
2609 s->spare2gh = I915_READ(VLV_SPAREG2H);
2611 /* Display CZ domain, 0x4400C-0x4402C, 0x4F000-0x4F11F */
2612 s->gt_imr = I915_READ(GTIMR);
2613 s->gt_ier = I915_READ(GTIER);
2614 s->pm_imr = I915_READ(GEN6_PMIMR);
2615 s->pm_ier = I915_READ(GEN6_PMIER);
2617 for (i = 0; i < ARRAY_SIZE(s->gt_scratch); i++)
2618 s->gt_scratch[i] = I915_READ(GEN7_GT_SCRATCH(i));
2620 /* GT SA CZ domain, 0x100000-0x138124 */
2621 s->tilectl = I915_READ(TILECTL);
2622 s->gt_fifoctl = I915_READ(GTFIFOCTL);
2623 s->gtlc_wake_ctrl = I915_READ(VLV_GTLC_WAKE_CTRL);
2624 s->gtlc_survive = I915_READ(VLV_GTLC_SURVIVABILITY_REG);
2625 s->pmwgicz = I915_READ(VLV_PMWGICZ);
2627 /* Gunit-Display CZ domain, 0x182028-0x1821CF */
2628 s->gu_ctl0 = I915_READ(VLV_GU_CTL0);
2629 s->gu_ctl1 = I915_READ(VLV_GU_CTL1);
2630 s->pcbr = I915_READ(VLV_PCBR);
2631 s->clock_gate_dis2 = I915_READ(VLV_GUNIT_CLOCK_GATE2);
2634 * Not saving any of:
2635 * DFT, 0x9800-0x9EC0
2636 * SARB, 0xB000-0xB1FC
2637 * GAC, 0x5208-0x524C, 0x14000-0x14C000
2642 static void vlv_restore_gunit_s0ix_state(struct drm_i915_private *dev_priv)
2644 struct vlv_s0ix_state *s = &dev_priv->vlv_s0ix_state;
2648 /* GAM 0x4000-0x4770 */
2649 I915_WRITE(GEN7_WR_WATERMARK, s->wr_watermark);
2650 I915_WRITE(GEN7_GFX_PRIO_CTRL, s->gfx_prio_ctrl);
2651 I915_WRITE(ARB_MODE, s->arb_mode | (0xffff << 16));
2652 I915_WRITE(GEN7_GFX_PEND_TLB0, s->gfx_pend_tlb0);
2653 I915_WRITE(GEN7_GFX_PEND_TLB1, s->gfx_pend_tlb1);
2655 for (i = 0; i < ARRAY_SIZE(s->lra_limits); i++)
2656 I915_WRITE(GEN7_LRA_LIMITS(i), s->lra_limits[i]);
2658 I915_WRITE(GEN7_MEDIA_MAX_REQ_COUNT, s->media_max_req_count);
2659 I915_WRITE(GEN7_GFX_MAX_REQ_COUNT, s->gfx_max_req_count);
2661 I915_WRITE(RENDER_HWS_PGA_GEN7, s->render_hwsp);
2662 I915_WRITE(GAM_ECOCHK, s->ecochk);
2663 I915_WRITE(BSD_HWS_PGA_GEN7, s->bsd_hwsp);
2664 I915_WRITE(BLT_HWS_PGA_GEN7, s->blt_hwsp);
2666 I915_WRITE(GEN7_TLB_RD_ADDR, s->tlb_rd_addr);
2668 /* MBC 0x9024-0x91D0, 0x8500 */
2669 I915_WRITE(VLV_G3DCTL, s->g3dctl);
2670 I915_WRITE(VLV_GSCKGCTL, s->gsckgctl);
2671 I915_WRITE(GEN6_MBCTL, s->mbctl);
2673 /* GCP 0x9400-0x9424, 0x8100-0x810C */
2674 I915_WRITE(GEN6_UCGCTL1, s->ucgctl1);
2675 I915_WRITE(GEN6_UCGCTL3, s->ucgctl3);
2676 I915_WRITE(GEN6_RCGCTL1, s->rcgctl1);
2677 I915_WRITE(GEN6_RCGCTL2, s->rcgctl2);
2678 I915_WRITE(GEN6_RSTCTL, s->rstctl);
2679 I915_WRITE(GEN7_MISCCPCTL, s->misccpctl);
2681 /* GPM 0xA000-0xAA84, 0x8000-0x80FC */
2682 I915_WRITE(GEN6_GFXPAUSE, s->gfxpause);
2683 I915_WRITE(GEN6_RPDEUHWTC, s->rpdeuhwtc);
2684 I915_WRITE(GEN6_RPDEUC, s->rpdeuc);
2685 I915_WRITE(ECOBUS, s->ecobus);
2686 I915_WRITE(VLV_PWRDWNUPCTL, s->pwrdwnupctl);
2687 I915_WRITE(GEN6_RP_DOWN_TIMEOUT,s->rp_down_timeout);
2688 I915_WRITE(GEN6_RPDEUCSW, s->rp_deucsw);
2689 I915_WRITE(GEN6_RCUBMABDTMR, s->rcubmabdtmr);
2690 I915_WRITE(VLV_RCEDATA, s->rcedata);
2691 I915_WRITE(VLV_SPAREG2H, s->spare2gh);
2693 /* Display CZ domain, 0x4400C-0x4402C, 0x4F000-0x4F11F */
2694 I915_WRITE(GTIMR, s->gt_imr);
2695 I915_WRITE(GTIER, s->gt_ier);
2696 I915_WRITE(GEN6_PMIMR, s->pm_imr);
2697 I915_WRITE(GEN6_PMIER, s->pm_ier);
2699 for (i = 0; i < ARRAY_SIZE(s->gt_scratch); i++)
2700 I915_WRITE(GEN7_GT_SCRATCH(i), s->gt_scratch[i]);
2702 /* GT SA CZ domain, 0x100000-0x138124 */
2703 I915_WRITE(TILECTL, s->tilectl);
2704 I915_WRITE(GTFIFOCTL, s->gt_fifoctl);
2706 * Preserve the GT allow wake and GFX force clock bit, they are not
2707 * be restored, as they are used to control the s0ix suspend/resume
2708 * sequence by the caller.
2710 val = I915_READ(VLV_GTLC_WAKE_CTRL);
2711 val &= VLV_GTLC_ALLOWWAKEREQ;
2712 val |= s->gtlc_wake_ctrl & ~VLV_GTLC_ALLOWWAKEREQ;
2713 I915_WRITE(VLV_GTLC_WAKE_CTRL, val);
2715 val = I915_READ(VLV_GTLC_SURVIVABILITY_REG);
2716 val &= VLV_GFX_CLK_FORCE_ON_BIT;
2717 val |= s->gtlc_survive & ~VLV_GFX_CLK_FORCE_ON_BIT;
2718 I915_WRITE(VLV_GTLC_SURVIVABILITY_REG, val);
2720 I915_WRITE(VLV_PMWGICZ, s->pmwgicz);
2722 /* Gunit-Display CZ domain, 0x182028-0x1821CF */
2723 I915_WRITE(VLV_GU_CTL0, s->gu_ctl0);
2724 I915_WRITE(VLV_GU_CTL1, s->gu_ctl1);
2725 I915_WRITE(VLV_PCBR, s->pcbr);
2726 I915_WRITE(VLV_GUNIT_CLOCK_GATE2, s->clock_gate_dis2);
2729 static int vlv_wait_for_pw_status(struct drm_i915_private *dev_priv,
2732 /* The HW does not like us polling for PW_STATUS frequently, so
2733 * use the sleeping loop rather than risk the busy spin within
2734 * intel_wait_for_register().
2736 * Transitioning between RC6 states should be at most 2ms (see
2737 * valleyview_enable_rps) so use a 3ms timeout.
2739 return wait_for((I915_READ_NOTRACE(VLV_GTLC_PW_STATUS) & mask) == val,
2743 int vlv_force_gfx_clock(struct drm_i915_private *dev_priv, bool force_on)
2748 val = I915_READ(VLV_GTLC_SURVIVABILITY_REG);
2749 val &= ~VLV_GFX_CLK_FORCE_ON_BIT;
2751 val |= VLV_GFX_CLK_FORCE_ON_BIT;
2752 I915_WRITE(VLV_GTLC_SURVIVABILITY_REG, val);
2757 err = intel_wait_for_register(dev_priv,
2758 VLV_GTLC_SURVIVABILITY_REG,
2759 VLV_GFX_CLK_STATUS_BIT,
2760 VLV_GFX_CLK_STATUS_BIT,
2763 DRM_ERROR("timeout waiting for GFX clock force-on (%08x)\n",
2764 I915_READ(VLV_GTLC_SURVIVABILITY_REG));
2769 static int vlv_allow_gt_wake(struct drm_i915_private *dev_priv, bool allow)
2775 val = I915_READ(VLV_GTLC_WAKE_CTRL);
2776 val &= ~VLV_GTLC_ALLOWWAKEREQ;
2778 val |= VLV_GTLC_ALLOWWAKEREQ;
2779 I915_WRITE(VLV_GTLC_WAKE_CTRL, val);
2780 POSTING_READ(VLV_GTLC_WAKE_CTRL);
2782 mask = VLV_GTLC_ALLOWWAKEACK;
2783 val = allow ? mask : 0;
2785 err = vlv_wait_for_pw_status(dev_priv, mask, val);
2787 DRM_ERROR("timeout disabling GT waking\n");
2792 static void vlv_wait_for_gt_wells(struct drm_i915_private *dev_priv,
2798 mask = VLV_GTLC_PW_MEDIA_STATUS_MASK | VLV_GTLC_PW_RENDER_STATUS_MASK;
2799 val = wait_for_on ? mask : 0;
2802 * RC6 transitioning can be delayed up to 2 msec (see
2803 * valleyview_enable_rps), use 3 msec for safety.
2805 * This can fail to turn off the rc6 if the GPU is stuck after a failed
2806 * reset and we are trying to force the machine to sleep.
2808 if (vlv_wait_for_pw_status(dev_priv, mask, val))
2809 DRM_DEBUG_DRIVER("timeout waiting for GT wells to go %s\n",
2810 onoff(wait_for_on));
2813 static void vlv_check_no_gt_access(struct drm_i915_private *dev_priv)
2815 if (!(I915_READ(VLV_GTLC_PW_STATUS) & VLV_GTLC_ALLOWWAKEERR))
2818 DRM_DEBUG_DRIVER("GT register access while GT waking disabled\n");
2819 I915_WRITE(VLV_GTLC_PW_STATUS, VLV_GTLC_ALLOWWAKEERR);
2822 static int vlv_suspend_complete(struct drm_i915_private *dev_priv)
2828 * Bspec defines the following GT well on flags as debug only, so
2829 * don't treat them as hard failures.
2831 vlv_wait_for_gt_wells(dev_priv, false);
2833 mask = VLV_GTLC_RENDER_CTX_EXISTS | VLV_GTLC_MEDIA_CTX_EXISTS;
2834 WARN_ON((I915_READ(VLV_GTLC_WAKE_CTRL) & mask) != mask);
2836 vlv_check_no_gt_access(dev_priv);
2838 err = vlv_force_gfx_clock(dev_priv, true);
2842 err = vlv_allow_gt_wake(dev_priv, false);
2846 if (!IS_CHERRYVIEW(dev_priv))
2847 vlv_save_gunit_s0ix_state(dev_priv);
2849 err = vlv_force_gfx_clock(dev_priv, false);
2856 /* For safety always re-enable waking and disable gfx clock forcing */
2857 vlv_allow_gt_wake(dev_priv, true);
2859 vlv_force_gfx_clock(dev_priv, false);
2864 static int vlv_resume_prepare(struct drm_i915_private *dev_priv,
2871 * If any of the steps fail just try to continue, that's the best we
2872 * can do at this point. Return the first error code (which will also
2873 * leave RPM permanently disabled).
2875 ret = vlv_force_gfx_clock(dev_priv, true);
2877 if (!IS_CHERRYVIEW(dev_priv))
2878 vlv_restore_gunit_s0ix_state(dev_priv);
2880 err = vlv_allow_gt_wake(dev_priv, true);
2884 err = vlv_force_gfx_clock(dev_priv, false);
2888 vlv_check_no_gt_access(dev_priv);
2891 intel_init_clock_gating(dev_priv);
2896 static int intel_runtime_suspend(struct device *kdev)
2898 struct pci_dev *pdev = to_pci_dev(kdev);
2899 struct drm_device *dev = pci_get_drvdata(pdev);
2900 struct drm_i915_private *dev_priv = to_i915(dev);
2903 if (WARN_ON_ONCE(!(dev_priv->gt_pm.rc6.enabled && HAS_RC6(dev_priv))))
2906 if (WARN_ON_ONCE(!HAS_RUNTIME_PM(dev_priv)))
2909 DRM_DEBUG_KMS("Suspending device\n");
2911 disable_rpm_wakeref_asserts(dev_priv);
2914 * We are safe here against re-faults, since the fault handler takes
2917 i915_gem_runtime_suspend(dev_priv);
2919 intel_uc_suspend(dev_priv);
2921 intel_runtime_pm_disable_interrupts(dev_priv);
2923 intel_uncore_suspend(dev_priv);
2926 if (IS_GEN9_LP(dev_priv)) {
2927 bxt_display_core_uninit(dev_priv);
2928 bxt_enable_dc9(dev_priv);
2929 } else if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv)) {
2930 hsw_enable_pc8(dev_priv);
2931 } else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) {
2932 ret = vlv_suspend_complete(dev_priv);
2936 DRM_ERROR("Runtime suspend failed, disabling it (%d)\n", ret);
2937 intel_uncore_runtime_resume(dev_priv);
2939 intel_runtime_pm_enable_interrupts(dev_priv);
2941 intel_uc_resume(dev_priv);
2943 i915_gem_init_swizzling(dev_priv);
2944 i915_gem_restore_fences(dev_priv);
2946 enable_rpm_wakeref_asserts(dev_priv);
2951 enable_rpm_wakeref_asserts(dev_priv);
2952 WARN_ON_ONCE(atomic_read(&dev_priv->runtime_pm.wakeref_count));
2954 if (intel_uncore_arm_unclaimed_mmio_detection(dev_priv))
2955 DRM_ERROR("Unclaimed access detected prior to suspending\n");
2957 dev_priv->runtime_pm.suspended = true;
2960 * FIXME: We really should find a document that references the arguments
2963 if (IS_BROADWELL(dev_priv)) {
2965 * On Broadwell, if we use PCI_D1 the PCH DDI ports will stop
2966 * being detected, and the call we do at intel_runtime_resume()
2967 * won't be able to restore them. Since PCI_D3hot matches the
2968 * actual specification and appears to be working, use it.
2970 intel_opregion_notify_adapter(dev_priv, PCI_D3hot);
2973 * current versions of firmware which depend on this opregion
2974 * notification have repurposed the D1 definition to mean
2975 * "runtime suspended" vs. what you would normally expect (D3)
2976 * to distinguish it from notifications that might be sent via
2979 intel_opregion_notify_adapter(dev_priv, PCI_D1);
2982 assert_forcewakes_inactive(dev_priv);
2984 if (!IS_VALLEYVIEW(dev_priv) && !IS_CHERRYVIEW(dev_priv))
2985 intel_hpd_poll_init(dev_priv);
2987 DRM_DEBUG_KMS("Device suspended\n");
2991 static int intel_runtime_resume(struct device *kdev)
2993 struct pci_dev *pdev = to_pci_dev(kdev);
2994 struct drm_device *dev = pci_get_drvdata(pdev);
2995 struct drm_i915_private *dev_priv = to_i915(dev);
2998 if (WARN_ON_ONCE(!HAS_RUNTIME_PM(dev_priv)))
3001 DRM_DEBUG_KMS("Resuming device\n");
3003 WARN_ON_ONCE(atomic_read(&dev_priv->runtime_pm.wakeref_count));
3004 disable_rpm_wakeref_asserts(dev_priv);
3006 intel_opregion_notify_adapter(dev_priv, PCI_D0);
3007 dev_priv->runtime_pm.suspended = false;
3008 if (intel_uncore_unclaimed_mmio(dev_priv))
3009 DRM_DEBUG_DRIVER("Unclaimed access during suspend, bios?\n");
3011 if (IS_GEN9_LP(dev_priv)) {
3012 bxt_disable_dc9(dev_priv);
3013 bxt_display_core_init(dev_priv, true);
3014 if (dev_priv->csr.dmc_payload &&
3015 (dev_priv->csr.allowed_dc_mask & DC_STATE_EN_UPTO_DC5))
3016 gen9_enable_dc5(dev_priv);
3017 } else if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv)) {
3018 hsw_disable_pc8(dev_priv);
3019 } else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) {
3020 ret = vlv_resume_prepare(dev_priv, true);
3023 intel_uncore_runtime_resume(dev_priv);
3025 intel_runtime_pm_enable_interrupts(dev_priv);
3027 intel_uc_resume(dev_priv);
3030 * No point of rolling back things in case of an error, as the best
3031 * we can do is to hope that things will still work (and disable RPM).
3033 i915_gem_init_swizzling(dev_priv);
3034 i915_gem_restore_fences(dev_priv);
3037 * On VLV/CHV display interrupts are part of the display
3038 * power well, so hpd is reinitialized from there. For
3039 * everyone else do it here.
3041 if (!IS_VALLEYVIEW(dev_priv) && !IS_CHERRYVIEW(dev_priv))
3042 intel_hpd_init(dev_priv);
3044 intel_enable_ipc(dev_priv);
3046 enable_rpm_wakeref_asserts(dev_priv);
3049 DRM_ERROR("Runtime resume failed, disabling it (%d)\n", ret);
3051 DRM_DEBUG_KMS("Device resumed\n");
3056 const struct dev_pm_ops i915_pm_ops = {
3058 * S0ix (via system suspend) and S3 event handlers [PMSG_SUSPEND,
3061 .prepare = i915_pm_prepare,
3062 .suspend = i915_pm_suspend,
3063 .suspend_late = i915_pm_suspend_late,
3064 .resume_early = i915_pm_resume_early,
3065 .resume = i915_pm_resume,
3069 * @freeze, @freeze_late : called (1) before creating the
3070 * hibernation image [PMSG_FREEZE] and
3071 * (2) after rebooting, before restoring
3072 * the image [PMSG_QUIESCE]
3073 * @thaw, @thaw_early : called (1) after creating the hibernation
3074 * image, before writing it [PMSG_THAW]
3075 * and (2) after failing to create or
3076 * restore the image [PMSG_RECOVER]
3077 * @poweroff, @poweroff_late: called after writing the hibernation
3078 * image, before rebooting [PMSG_HIBERNATE]
3079 * @restore, @restore_early : called after rebooting and restoring the
3080 * hibernation image [PMSG_RESTORE]
3082 .freeze = i915_pm_freeze,
3083 .freeze_late = i915_pm_freeze_late,
3084 .thaw_early = i915_pm_thaw_early,
3085 .thaw = i915_pm_thaw,
3086 .poweroff = i915_pm_suspend,
3087 .poweroff_late = i915_pm_poweroff_late,
3088 .restore_early = i915_pm_restore_early,
3089 .restore = i915_pm_restore,
3091 /* S0ix (via runtime suspend) event handlers */
3092 .runtime_suspend = intel_runtime_suspend,
3093 .runtime_resume = intel_runtime_resume,
3096 static const struct vm_operations_struct i915_gem_vm_ops = {
3097 .fault = i915_gem_fault,
3098 .open = drm_gem_vm_open,
3099 .close = drm_gem_vm_close,
3102 static const struct file_operations i915_driver_fops = {
3103 .owner = THIS_MODULE,
3105 .release = drm_release,
3106 .unlocked_ioctl = drm_ioctl,
3107 .mmap = drm_gem_mmap,
3110 .compat_ioctl = i915_compat_ioctl,
3111 .llseek = noop_llseek,
3115 i915_gem_reject_pin_ioctl(struct drm_device *dev, void *data,
3116 struct drm_file *file)
3121 static const struct drm_ioctl_desc i915_ioctls[] = {
3122 DRM_IOCTL_DEF_DRV(I915_INIT, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
3123 DRM_IOCTL_DEF_DRV(I915_FLUSH, drm_noop, DRM_AUTH),
3124 DRM_IOCTL_DEF_DRV(I915_FLIP, drm_noop, DRM_AUTH),
3125 DRM_IOCTL_DEF_DRV(I915_BATCHBUFFER, drm_noop, DRM_AUTH),
3126 DRM_IOCTL_DEF_DRV(I915_IRQ_EMIT, drm_noop, DRM_AUTH),
3127 DRM_IOCTL_DEF_DRV(I915_IRQ_WAIT, drm_noop, DRM_AUTH),
3128 DRM_IOCTL_DEF_DRV(I915_GETPARAM, i915_getparam_ioctl, DRM_AUTH|DRM_RENDER_ALLOW),
3129 DRM_IOCTL_DEF_DRV(I915_SETPARAM, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
3130 DRM_IOCTL_DEF_DRV(I915_ALLOC, drm_noop, DRM_AUTH),
3131 DRM_IOCTL_DEF_DRV(I915_FREE, drm_noop, DRM_AUTH),
3132 DRM_IOCTL_DEF_DRV(I915_INIT_HEAP, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
3133 DRM_IOCTL_DEF_DRV(I915_CMDBUFFER, drm_noop, DRM_AUTH),
3134 DRM_IOCTL_DEF_DRV(I915_DESTROY_HEAP, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
3135 DRM_IOCTL_DEF_DRV(I915_SET_VBLANK_PIPE, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
3136 DRM_IOCTL_DEF_DRV(I915_GET_VBLANK_PIPE, drm_noop, DRM_AUTH),
3137 DRM_IOCTL_DEF_DRV(I915_VBLANK_SWAP, drm_noop, DRM_AUTH),
3138 DRM_IOCTL_DEF_DRV(I915_HWS_ADDR, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
3139 DRM_IOCTL_DEF_DRV(I915_GEM_INIT, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
3140 DRM_IOCTL_DEF_DRV(I915_GEM_EXECBUFFER, i915_gem_execbuffer_ioctl, DRM_AUTH),
3141 DRM_IOCTL_DEF_DRV(I915_GEM_EXECBUFFER2_WR, i915_gem_execbuffer2_ioctl, DRM_AUTH|DRM_RENDER_ALLOW),
3142 DRM_IOCTL_DEF_DRV(I915_GEM_PIN, i915_gem_reject_pin_ioctl, DRM_AUTH|DRM_ROOT_ONLY),
3143 DRM_IOCTL_DEF_DRV(I915_GEM_UNPIN, i915_gem_reject_pin_ioctl, DRM_AUTH|DRM_ROOT_ONLY),
3144 DRM_IOCTL_DEF_DRV(I915_GEM_BUSY, i915_gem_busy_ioctl, DRM_AUTH|DRM_RENDER_ALLOW),
3145 DRM_IOCTL_DEF_DRV(I915_GEM_SET_CACHING, i915_gem_set_caching_ioctl, DRM_RENDER_ALLOW),
3146 DRM_IOCTL_DEF_DRV(I915_GEM_GET_CACHING, i915_gem_get_caching_ioctl, DRM_RENDER_ALLOW),
3147 DRM_IOCTL_DEF_DRV(I915_GEM_THROTTLE, i915_gem_throttle_ioctl, DRM_AUTH|DRM_RENDER_ALLOW),
3148 DRM_IOCTL_DEF_DRV(I915_GEM_ENTERVT, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
3149 DRM_IOCTL_DEF_DRV(I915_GEM_LEAVEVT, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
3150 DRM_IOCTL_DEF_DRV(I915_GEM_CREATE, i915_gem_create_ioctl, DRM_RENDER_ALLOW),
3151 DRM_IOCTL_DEF_DRV(I915_GEM_PREAD, i915_gem_pread_ioctl, DRM_RENDER_ALLOW),
3152 DRM_IOCTL_DEF_DRV(I915_GEM_PWRITE, i915_gem_pwrite_ioctl, DRM_RENDER_ALLOW),
3153 DRM_IOCTL_DEF_DRV(I915_GEM_MMAP, i915_gem_mmap_ioctl, DRM_RENDER_ALLOW),
3154 DRM_IOCTL_DEF_DRV(I915_GEM_MMAP_GTT, i915_gem_mmap_gtt_ioctl, DRM_RENDER_ALLOW),
3155 DRM_IOCTL_DEF_DRV(I915_GEM_SET_DOMAIN, i915_gem_set_domain_ioctl, DRM_RENDER_ALLOW),
3156 DRM_IOCTL_DEF_DRV(I915_GEM_SW_FINISH, i915_gem_sw_finish_ioctl, DRM_RENDER_ALLOW),
3157 DRM_IOCTL_DEF_DRV(I915_GEM_SET_TILING, i915_gem_set_tiling_ioctl, DRM_RENDER_ALLOW),
3158 DRM_IOCTL_DEF_DRV(I915_GEM_GET_TILING, i915_gem_get_tiling_ioctl, DRM_RENDER_ALLOW),
3159 DRM_IOCTL_DEF_DRV(I915_GEM_GET_APERTURE, i915_gem_get_aperture_ioctl, DRM_RENDER_ALLOW),
3160 DRM_IOCTL_DEF_DRV(I915_GET_PIPE_FROM_CRTC_ID, intel_get_pipe_from_crtc_id_ioctl, 0),
3161 DRM_IOCTL_DEF_DRV(I915_GEM_MADVISE, i915_gem_madvise_ioctl, DRM_RENDER_ALLOW),
3162 DRM_IOCTL_DEF_DRV(I915_OVERLAY_PUT_IMAGE, intel_overlay_put_image_ioctl, DRM_MASTER),
3163 DRM_IOCTL_DEF_DRV(I915_OVERLAY_ATTRS, intel_overlay_attrs_ioctl, DRM_MASTER),
3164 DRM_IOCTL_DEF_DRV(I915_SET_SPRITE_COLORKEY, intel_sprite_set_colorkey_ioctl, DRM_MASTER),
3165 DRM_IOCTL_DEF_DRV(I915_GET_SPRITE_COLORKEY, drm_noop, DRM_MASTER),
3166 DRM_IOCTL_DEF_DRV(I915_GEM_WAIT, i915_gem_wait_ioctl, DRM_AUTH|DRM_RENDER_ALLOW),
3167 DRM_IOCTL_DEF_DRV(I915_GEM_CONTEXT_CREATE, i915_gem_context_create_ioctl, DRM_RENDER_ALLOW),
3168 DRM_IOCTL_DEF_DRV(I915_GEM_CONTEXT_DESTROY, i915_gem_context_destroy_ioctl, DRM_RENDER_ALLOW),
3169 DRM_IOCTL_DEF_DRV(I915_REG_READ, i915_reg_read_ioctl, DRM_RENDER_ALLOW),
3170 DRM_IOCTL_DEF_DRV(I915_GET_RESET_STATS, i915_gem_context_reset_stats_ioctl, DRM_RENDER_ALLOW),
3171 DRM_IOCTL_DEF_DRV(I915_GEM_USERPTR, i915_gem_userptr_ioctl, DRM_RENDER_ALLOW),
3172 DRM_IOCTL_DEF_DRV(I915_GEM_CONTEXT_GETPARAM, i915_gem_context_getparam_ioctl, DRM_RENDER_ALLOW),
3173 DRM_IOCTL_DEF_DRV(I915_GEM_CONTEXT_SETPARAM, i915_gem_context_setparam_ioctl, DRM_RENDER_ALLOW),
3174 DRM_IOCTL_DEF_DRV(I915_PERF_OPEN, i915_perf_open_ioctl, DRM_RENDER_ALLOW),
3175 DRM_IOCTL_DEF_DRV(I915_PERF_ADD_CONFIG, i915_perf_add_config_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW),
3176 DRM_IOCTL_DEF_DRV(I915_PERF_REMOVE_CONFIG, i915_perf_remove_config_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW),
3177 DRM_IOCTL_DEF_DRV(I915_QUERY, i915_query_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW),
3180 static struct drm_driver driver = {
3181 /* Don't use MTRRs here; the Xserver or userspace app should
3182 * deal with them for Intel hardware.
3185 DRIVER_HAVE_IRQ | DRIVER_IRQ_SHARED | DRIVER_GEM | DRIVER_PRIME |
3186 DRIVER_RENDER | DRIVER_MODESET | DRIVER_ATOMIC | DRIVER_SYNCOBJ,
3187 .release = i915_driver_release,
3188 .open = i915_driver_open,
3189 .lastclose = i915_driver_lastclose,
3190 .postclose = i915_driver_postclose,
3192 .gem_close_object = i915_gem_close_object,
3193 .gem_free_object_unlocked = i915_gem_free_object,
3194 .gem_vm_ops = &i915_gem_vm_ops,
3196 .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
3197 .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
3198 .gem_prime_export = i915_gem_prime_export,
3199 .gem_prime_import = i915_gem_prime_import,
3201 .dumb_create = i915_gem_dumb_create,
3202 .dumb_map_offset = i915_gem_mmap_gtt,
3203 .ioctls = i915_ioctls,
3204 .num_ioctls = ARRAY_SIZE(i915_ioctls),
3205 .fops = &i915_driver_fops,
3206 .name = DRIVER_NAME,
3207 .desc = DRIVER_DESC,
3208 .date = DRIVER_DATE,
3209 .major = DRIVER_MAJOR,
3210 .minor = DRIVER_MINOR,
3211 .patchlevel = DRIVER_PATCHLEVEL,
3214 #if IS_ENABLED(CONFIG_DRM_I915_SELFTEST)
3215 #include "selftests/mock_drm.c"