1 /* i915_dma.c -- DMA support for the I915 -*- linux-c -*-
4 * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
7 * Permission is hereby granted, free of charge, to any person obtaining a
8 * copy of this software and associated documentation files (the
9 * "Software"), to deal in the Software without restriction, including
10 * without limitation the rights to use, copy, modify, merge, publish,
11 * distribute, sub license, and/or sell copies of the Software, and to
12 * permit persons to whom the Software is furnished to do so, subject to
13 * the following conditions:
15 * The above copyright notice and this permission notice (including the
16 * next paragraph) shall be included in all copies or substantial portions
19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
20 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
21 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
22 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
23 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
24 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
25 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
29 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
31 #include <linux/async.h>
33 #include <drm/drm_crtc_helper.h>
34 #include <drm/drm_fb_helper.h>
35 #include <drm/drm_legacy.h>
36 #include "intel_drv.h"
37 #include <drm/i915_drm.h>
39 #include "i915_vgpu.h"
40 #include "i915_trace.h"
41 #include <linux/pci.h>
42 #include <linux/console.h>
44 #include <linux/vgaarb.h>
45 #include <linux/acpi.h>
46 #include <linux/pnp.h>
47 #include <linux/vga_switcheroo.h>
48 #include <linux/slab.h>
49 #include <acpi/video.h>
51 #include <linux/pm_runtime.h>
52 #include <linux/oom.h>
55 static int i915_getparam(struct drm_device *dev, void *data,
56 struct drm_file *file_priv)
58 struct drm_i915_private *dev_priv = dev->dev_private;
59 drm_i915_getparam_t *param = data;
62 switch (param->param) {
63 case I915_PARAM_IRQ_ACTIVE:
64 case I915_PARAM_ALLOW_BATCHBUFFER:
65 case I915_PARAM_LAST_DISPATCH:
66 /* Reject all old ums/dri params. */
68 case I915_PARAM_CHIPSET_ID:
69 value = dev->pdev->device;
71 case I915_PARAM_REVISION:
72 value = dev->pdev->revision;
74 case I915_PARAM_HAS_GEM:
77 case I915_PARAM_NUM_FENCES_AVAIL:
78 value = dev_priv->num_fence_regs - dev_priv->fence_reg_start;
80 case I915_PARAM_HAS_OVERLAY:
81 value = dev_priv->overlay ? 1 : 0;
83 case I915_PARAM_HAS_PAGEFLIPPING:
86 case I915_PARAM_HAS_EXECBUF2:
90 case I915_PARAM_HAS_BSD:
91 value = intel_ring_initialized(&dev_priv->ring[VCS]);
93 case I915_PARAM_HAS_BLT:
94 value = intel_ring_initialized(&dev_priv->ring[BCS]);
96 case I915_PARAM_HAS_VEBOX:
97 value = intel_ring_initialized(&dev_priv->ring[VECS]);
99 case I915_PARAM_HAS_BSD2:
100 value = intel_ring_initialized(&dev_priv->ring[VCS2]);
102 case I915_PARAM_HAS_RELAXED_FENCING:
105 case I915_PARAM_HAS_COHERENT_RINGS:
108 case I915_PARAM_HAS_EXEC_CONSTANTS:
109 value = INTEL_INFO(dev)->gen >= 4;
111 case I915_PARAM_HAS_RELAXED_DELTA:
114 case I915_PARAM_HAS_GEN7_SOL_RESET:
117 case I915_PARAM_HAS_LLC:
118 value = HAS_LLC(dev);
120 case I915_PARAM_HAS_WT:
123 case I915_PARAM_HAS_ALIASING_PPGTT:
124 value = USES_PPGTT(dev);
126 case I915_PARAM_HAS_WAIT_TIMEOUT:
129 case I915_PARAM_HAS_SEMAPHORES:
130 value = i915_semaphore_is_enabled(dev);
132 case I915_PARAM_HAS_PRIME_VMAP_FLUSH:
135 case I915_PARAM_HAS_SECURE_BATCHES:
136 value = capable(CAP_SYS_ADMIN);
138 case I915_PARAM_HAS_PINNED_BATCHES:
141 case I915_PARAM_HAS_EXEC_NO_RELOC:
144 case I915_PARAM_HAS_EXEC_HANDLE_LUT:
147 case I915_PARAM_CMD_PARSER_VERSION:
148 value = i915_cmd_parser_get_version();
150 case I915_PARAM_HAS_COHERENT_PHYS_GTT:
153 case I915_PARAM_MMAP_VERSION:
156 case I915_PARAM_SUBSLICE_TOTAL:
157 value = INTEL_INFO(dev)->subslice_total;
161 case I915_PARAM_EU_TOTAL:
162 value = INTEL_INFO(dev)->eu_total;
167 DRM_DEBUG("Unknown parameter %d\n", param->param);
171 if (copy_to_user(param->value, &value, sizeof(int))) {
172 DRM_ERROR("copy_to_user failed\n");
179 static int i915_setparam(struct drm_device *dev, void *data,
180 struct drm_file *file_priv)
182 struct drm_i915_private *dev_priv = dev->dev_private;
183 drm_i915_setparam_t *param = data;
185 switch (param->param) {
186 case I915_SETPARAM_USE_MI_BATCHBUFFER_START:
187 case I915_SETPARAM_TEX_LRU_LOG_GRANULARITY:
188 case I915_SETPARAM_ALLOW_BATCHBUFFER:
189 /* Reject all old ums/dri params. */
192 case I915_SETPARAM_NUM_USED_FENCES:
193 if (param->value > dev_priv->num_fence_regs ||
196 /* Userspace can use first N regs */
197 dev_priv->fence_reg_start = param->value;
200 DRM_DEBUG_DRIVER("unknown parameter %d\n",
208 static int i915_get_bridge_dev(struct drm_device *dev)
210 struct drm_i915_private *dev_priv = dev->dev_private;
212 dev_priv->bridge_dev = pci_get_bus_and_slot(0, PCI_DEVFN(0, 0));
213 if (!dev_priv->bridge_dev) {
214 DRM_ERROR("bridge device not found\n");
220 #define MCHBAR_I915 0x44
221 #define MCHBAR_I965 0x48
222 #define MCHBAR_SIZE (4*4096)
224 #define DEVEN_REG 0x54
225 #define DEVEN_MCHBAR_EN (1 << 28)
227 /* Allocate space for the MCH regs if needed, return nonzero on error */
229 intel_alloc_mchbar_resource(struct drm_device *dev)
231 struct drm_i915_private *dev_priv = dev->dev_private;
232 int reg = INTEL_INFO(dev)->gen >= 4 ? MCHBAR_I965 : MCHBAR_I915;
233 u32 temp_lo, temp_hi = 0;
237 if (INTEL_INFO(dev)->gen >= 4)
238 pci_read_config_dword(dev_priv->bridge_dev, reg + 4, &temp_hi);
239 pci_read_config_dword(dev_priv->bridge_dev, reg, &temp_lo);
240 mchbar_addr = ((u64)temp_hi << 32) | temp_lo;
242 /* If ACPI doesn't have it, assume we need to allocate it ourselves */
245 pnp_range_reserved(mchbar_addr, mchbar_addr + MCHBAR_SIZE))
249 /* Get some space for it */
250 dev_priv->mch_res.name = "i915 MCHBAR";
251 dev_priv->mch_res.flags = IORESOURCE_MEM;
252 ret = pci_bus_alloc_resource(dev_priv->bridge_dev->bus,
254 MCHBAR_SIZE, MCHBAR_SIZE,
256 0, pcibios_align_resource,
257 dev_priv->bridge_dev);
259 DRM_DEBUG_DRIVER("failed bus alloc: %d\n", ret);
260 dev_priv->mch_res.start = 0;
264 if (INTEL_INFO(dev)->gen >= 4)
265 pci_write_config_dword(dev_priv->bridge_dev, reg + 4,
266 upper_32_bits(dev_priv->mch_res.start));
268 pci_write_config_dword(dev_priv->bridge_dev, reg,
269 lower_32_bits(dev_priv->mch_res.start));
273 /* Setup MCHBAR if possible, return true if we should disable it again */
275 intel_setup_mchbar(struct drm_device *dev)
277 struct drm_i915_private *dev_priv = dev->dev_private;
278 int mchbar_reg = INTEL_INFO(dev)->gen >= 4 ? MCHBAR_I965 : MCHBAR_I915;
282 if (IS_VALLEYVIEW(dev))
285 dev_priv->mchbar_need_disable = false;
287 if (IS_I915G(dev) || IS_I915GM(dev)) {
288 pci_read_config_dword(dev_priv->bridge_dev, DEVEN_REG, &temp);
289 enabled = !!(temp & DEVEN_MCHBAR_EN);
291 pci_read_config_dword(dev_priv->bridge_dev, mchbar_reg, &temp);
295 /* If it's already enabled, don't have to do anything */
299 if (intel_alloc_mchbar_resource(dev))
302 dev_priv->mchbar_need_disable = true;
304 /* Space is allocated or reserved, so enable it. */
305 if (IS_I915G(dev) || IS_I915GM(dev)) {
306 pci_write_config_dword(dev_priv->bridge_dev, DEVEN_REG,
307 temp | DEVEN_MCHBAR_EN);
309 pci_read_config_dword(dev_priv->bridge_dev, mchbar_reg, &temp);
310 pci_write_config_dword(dev_priv->bridge_dev, mchbar_reg, temp | 1);
315 intel_teardown_mchbar(struct drm_device *dev)
317 struct drm_i915_private *dev_priv = dev->dev_private;
318 int mchbar_reg = INTEL_INFO(dev)->gen >= 4 ? MCHBAR_I965 : MCHBAR_I915;
321 if (dev_priv->mchbar_need_disable) {
322 if (IS_I915G(dev) || IS_I915GM(dev)) {
323 pci_read_config_dword(dev_priv->bridge_dev, DEVEN_REG, &temp);
324 temp &= ~DEVEN_MCHBAR_EN;
325 pci_write_config_dword(dev_priv->bridge_dev, DEVEN_REG, temp);
327 pci_read_config_dword(dev_priv->bridge_dev, mchbar_reg, &temp);
329 pci_write_config_dword(dev_priv->bridge_dev, mchbar_reg, temp);
333 if (dev_priv->mch_res.start)
334 release_resource(&dev_priv->mch_res);
337 /* true = enable decode, false = disable decoder */
338 static unsigned int i915_vga_set_decode(void *cookie, bool state)
340 struct drm_device *dev = cookie;
342 intel_modeset_vga_set_state(dev, state);
344 return VGA_RSRC_LEGACY_IO | VGA_RSRC_LEGACY_MEM |
345 VGA_RSRC_NORMAL_IO | VGA_RSRC_NORMAL_MEM;
347 return VGA_RSRC_NORMAL_IO | VGA_RSRC_NORMAL_MEM;
350 static void i915_switcheroo_set_state(struct pci_dev *pdev, enum vga_switcheroo_state state)
352 struct drm_device *dev = pci_get_drvdata(pdev);
353 pm_message_t pmm = { .event = PM_EVENT_SUSPEND };
355 if (state == VGA_SWITCHEROO_ON) {
356 pr_info("switched on\n");
357 dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;
358 /* i915 resume handler doesn't set to D0 */
359 pci_set_power_state(dev->pdev, PCI_D0);
360 i915_resume_legacy(dev);
361 dev->switch_power_state = DRM_SWITCH_POWER_ON;
363 pr_err("switched off\n");
364 dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;
365 i915_suspend_legacy(dev, pmm);
366 dev->switch_power_state = DRM_SWITCH_POWER_OFF;
370 static bool i915_switcheroo_can_switch(struct pci_dev *pdev)
372 struct drm_device *dev = pci_get_drvdata(pdev);
375 * FIXME: open_count is protected by drm_global_mutex but that would lead to
376 * locking inversion with the driver load path. And the access here is
377 * completely racy anyway. So don't bother with locking for now.
379 return dev->open_count == 0;
382 static const struct vga_switcheroo_client_ops i915_switcheroo_ops = {
383 .set_gpu_state = i915_switcheroo_set_state,
385 .can_switch = i915_switcheroo_can_switch,
388 static int i915_load_modeset_init(struct drm_device *dev)
390 struct drm_i915_private *dev_priv = dev->dev_private;
393 ret = intel_parse_bios(dev);
395 DRM_INFO("failed to find VBIOS tables\n");
397 /* If we have > 1 VGA cards, then we need to arbitrate access
398 * to the common VGA resources.
400 * If we are a secondary display controller (!PCI_DISPLAY_CLASS_VGA),
401 * then we do not take part in VGA arbitration and the
402 * vga_client_register() fails with -ENODEV.
404 ret = vga_client_register(dev->pdev, dev, NULL, i915_vga_set_decode);
405 if (ret && ret != -ENODEV)
408 intel_register_dsm_handler();
410 ret = vga_switcheroo_register_client(dev->pdev, &i915_switcheroo_ops, false);
412 goto cleanup_vga_client;
414 /* Initialise stolen first so that we may reserve preallocated
415 * objects for the BIOS to KMS transition.
417 ret = i915_gem_init_stolen(dev);
419 goto cleanup_vga_switcheroo;
421 intel_power_domains_init_hw(dev_priv);
423 ret = intel_irq_install(dev_priv);
425 goto cleanup_gem_stolen;
427 /* Important: The output setup functions called by modeset_init need
428 * working irqs for e.g. gmbus and dp aux transfers. */
429 intel_modeset_init(dev);
431 ret = i915_gem_init(dev);
435 intel_modeset_gem_init(dev);
437 /* Always safe in the mode setting case. */
438 /* FIXME: do pre/post-mode set stuff in core KMS code */
439 dev->vblank_disable_allowed = true;
440 if (INTEL_INFO(dev)->num_pipes == 0)
443 ret = intel_fbdev_init(dev);
447 /* Only enable hotplug handling once the fbdev is fully set up. */
448 intel_hpd_init(dev_priv);
451 * Some ports require correctly set-up hpd registers for detection to
452 * work properly (leading to ghost connected connector status), e.g. VGA
453 * on gm45. Hence we can only set up the initial fbdev config after hpd
454 * irqs are fully enabled. Now we should scan for the initial config
455 * only once hotplug handling is enabled, but due to screwed-up locking
456 * around kms/fbdev init we can't protect the fdbev initial config
457 * scanning against hotplug events. Hence do this first and ignore the
458 * tiny window where we will loose hotplug notifactions.
460 async_schedule(intel_fbdev_initial_config, dev_priv);
462 drm_kms_helper_poll_init(dev);
467 mutex_lock(&dev->struct_mutex);
468 i915_gem_cleanup_ringbuffer(dev);
469 i915_gem_context_fini(dev);
470 mutex_unlock(&dev->struct_mutex);
472 drm_irq_uninstall(dev);
474 i915_gem_cleanup_stolen(dev);
475 cleanup_vga_switcheroo:
476 vga_switcheroo_unregister_client(dev->pdev);
478 vga_client_register(dev->pdev, NULL, NULL, NULL);
483 #if IS_ENABLED(CONFIG_FB)
484 static int i915_kick_out_firmware_fb(struct drm_i915_private *dev_priv)
486 struct apertures_struct *ap;
487 struct pci_dev *pdev = dev_priv->dev->pdev;
491 ap = alloc_apertures(1);
495 ap->ranges[0].base = dev_priv->gtt.mappable_base;
496 ap->ranges[0].size = dev_priv->gtt.mappable_end;
499 pdev->resource[PCI_ROM_RESOURCE].flags & IORESOURCE_ROM_SHADOW;
501 ret = remove_conflicting_framebuffers(ap, "inteldrmfb", primary);
508 static int i915_kick_out_firmware_fb(struct drm_i915_private *dev_priv)
514 #if !defined(CONFIG_VGA_CONSOLE)
515 static int i915_kick_out_vgacon(struct drm_i915_private *dev_priv)
519 #elif !defined(CONFIG_DUMMY_CONSOLE)
520 static int i915_kick_out_vgacon(struct drm_i915_private *dev_priv)
525 static int i915_kick_out_vgacon(struct drm_i915_private *dev_priv)
529 DRM_INFO("Replacing VGA console driver\n");
532 if (con_is_bound(&vga_con))
533 ret = do_take_over_console(&dummy_con, 0, MAX_NR_CONSOLES - 1, 1);
535 ret = do_unregister_con_driver(&vga_con);
537 /* Ignore "already unregistered". */
547 static void i915_dump_device_info(struct drm_i915_private *dev_priv)
549 const struct intel_device_info *info = &dev_priv->info;
551 #define PRINT_S(name) "%s"
553 #define PRINT_FLAG(name) info->name ? #name "," : ""
555 DRM_DEBUG_DRIVER("i915 device info: gen=%i, pciid=0x%04x rev=0x%02x flags="
556 DEV_INFO_FOR_EACH_FLAG(PRINT_S, SEP_EMPTY),
558 dev_priv->dev->pdev->device,
559 dev_priv->dev->pdev->revision,
560 DEV_INFO_FOR_EACH_FLAG(PRINT_FLAG, SEP_COMMA));
568 * Determine various intel_device_info fields at runtime.
570 * Use it when either:
571 * - it's judged too laborious to fill n static structures with the limit
572 * when a simple if statement does the job,
573 * - run-time checks (eg read fuse/strap registers) are needed.
575 * This function needs to be called:
576 * - after the MMIO has been setup as we are reading registers,
577 * - after the PCH has been detected,
578 * - before the first usage of the fields it can tweak.
580 static void intel_device_info_runtime_init(struct drm_device *dev)
582 struct drm_i915_private *dev_priv = dev->dev_private;
583 struct intel_device_info *info;
586 info = (struct intel_device_info *)&dev_priv->info;
588 if (IS_VALLEYVIEW(dev) || INTEL_INFO(dev)->gen == 9)
589 for_each_pipe(dev_priv, pipe)
590 info->num_sprites[pipe] = 2;
592 for_each_pipe(dev_priv, pipe)
593 info->num_sprites[pipe] = 1;
595 if (i915.disable_display) {
596 DRM_INFO("Display disabled (module parameter)\n");
598 } else if (info->num_pipes > 0 &&
599 (INTEL_INFO(dev)->gen == 7 || INTEL_INFO(dev)->gen == 8) &&
600 !IS_VALLEYVIEW(dev)) {
601 u32 fuse_strap = I915_READ(FUSE_STRAP);
602 u32 sfuse_strap = I915_READ(SFUSE_STRAP);
605 * SFUSE_STRAP is supposed to have a bit signalling the display
606 * is fused off. Unfortunately it seems that, at least in
607 * certain cases, fused off display means that PCH display
608 * reads don't land anywhere. In that case, we read 0s.
610 * On CPT/PPT, we can detect this case as SFUSE_STRAP_FUSE_LOCK
611 * should be set when taking over after the firmware.
613 if (fuse_strap & ILK_INTERNAL_DISPLAY_DISABLE ||
614 sfuse_strap & SFUSE_STRAP_DISPLAY_DISABLED ||
615 (dev_priv->pch_type == PCH_CPT &&
616 !(sfuse_strap & SFUSE_STRAP_FUSE_LOCK))) {
617 DRM_INFO("Display fused off, disabling\n");
622 /* Initialize slice/subslice/EU info */
623 if (IS_CHERRYVIEW(dev)) {
626 fuse = I915_READ(CHV_FUSE_GT);
628 info->slice_total = 1;
630 if (!(fuse & CHV_FGT_DISABLE_SS0)) {
631 info->subslice_per_slice++;
632 eu_dis = fuse & (CHV_FGT_EU_DIS_SS0_R0_MASK |
633 CHV_FGT_EU_DIS_SS0_R1_MASK);
634 info->eu_total += 8 - hweight32(eu_dis);
637 if (!(fuse & CHV_FGT_DISABLE_SS1)) {
638 info->subslice_per_slice++;
639 eu_dis = fuse & (CHV_FGT_EU_DIS_SS1_R0_MASK |
640 CHV_FGT_EU_DIS_SS1_R1_MASK);
641 info->eu_total += 8 - hweight32(eu_dis);
644 info->subslice_total = info->subslice_per_slice;
646 * CHV expected to always have a uniform distribution of EU
649 info->eu_per_subslice = info->subslice_total ?
650 info->eu_total / info->subslice_total :
653 * CHV supports subslice power gating on devices with more than
654 * one subslice, and supports EU power gating on devices with
655 * more than one EU pair per subslice.
657 info->has_slice_pg = 0;
658 info->has_subslice_pg = (info->subslice_total > 1);
659 info->has_eu_pg = (info->eu_per_subslice > 2);
660 } else if (IS_SKYLAKE(dev)) {
661 const int s_max = 3, ss_max = 4, eu_max = 8;
663 u32 fuse2, eu_disable[s_max], s_enable, ss_disable;
665 fuse2 = I915_READ(GEN8_FUSE2);
666 s_enable = (fuse2 & GEN8_F2_S_ENA_MASK) >>
668 ss_disable = (fuse2 & GEN9_F2_SS_DIS_MASK) >>
669 GEN9_F2_SS_DIS_SHIFT;
671 eu_disable[0] = I915_READ(GEN8_EU_DISABLE0);
672 eu_disable[1] = I915_READ(GEN8_EU_DISABLE1);
673 eu_disable[2] = I915_READ(GEN8_EU_DISABLE2);
675 info->slice_total = hweight32(s_enable);
677 * The subslice disable field is global, i.e. it applies
678 * to each of the enabled slices.
680 info->subslice_per_slice = ss_max - hweight32(ss_disable);
681 info->subslice_total = info->slice_total *
682 info->subslice_per_slice;
685 * Iterate through enabled slices and subslices to
686 * count the total enabled EU.
688 for (s = 0; s < s_max; s++) {
689 if (!(s_enable & (0x1 << s)))
690 /* skip disabled slice */
693 for (ss = 0; ss < ss_max; ss++) {
696 if (ss_disable & (0x1 << ss))
697 /* skip disabled subslice */
700 n_disabled = hweight8(eu_disable[s] >>
704 * Record which subslice(s) has(have) 7 EUs. we
705 * can tune the hash used to spread work among
706 * subslices if they are unbalanced.
708 if (eu_max - n_disabled == 7)
709 info->subslice_7eu[s] |= 1 << ss;
711 info->eu_total += eu_max - n_disabled;
716 * SKL is expected to always have a uniform distribution
717 * of EU across subslices with the exception that any one
718 * EU in any one subslice may be fused off for die
721 info->eu_per_subslice = info->subslice_total ?
722 DIV_ROUND_UP(info->eu_total,
723 info->subslice_total) : 0;
725 * SKL supports slice power gating on devices with more than
726 * one slice, and supports EU power gating on devices with
727 * more than one EU pair per subslice.
729 info->has_slice_pg = (info->slice_total > 1) ? 1 : 0;
730 info->has_subslice_pg = 0;
731 info->has_eu_pg = (info->eu_per_subslice > 2) ? 1 : 0;
733 DRM_DEBUG_DRIVER("slice total: %u\n", info->slice_total);
734 DRM_DEBUG_DRIVER("subslice total: %u\n", info->subslice_total);
735 DRM_DEBUG_DRIVER("subslice per slice: %u\n", info->subslice_per_slice);
736 DRM_DEBUG_DRIVER("EU total: %u\n", info->eu_total);
737 DRM_DEBUG_DRIVER("EU per subslice: %u\n", info->eu_per_subslice);
738 DRM_DEBUG_DRIVER("has slice power gating: %s\n",
739 info->has_slice_pg ? "y" : "n");
740 DRM_DEBUG_DRIVER("has subslice power gating: %s\n",
741 info->has_subslice_pg ? "y" : "n");
742 DRM_DEBUG_DRIVER("has EU power gating: %s\n",
743 info->has_eu_pg ? "y" : "n");
747 * i915_driver_load - setup chip and create an initial config
749 * @flags: startup flags
751 * The driver load routine has to do several things:
752 * - drive output discovery via intel_modeset_init()
753 * - initialize the memory manager
754 * - allocate initial config memory
755 * - setup the DRM framebuffer with the allocated memory
757 int i915_driver_load(struct drm_device *dev, unsigned long flags)
759 struct drm_i915_private *dev_priv;
760 struct intel_device_info *info, *device_info;
761 int ret = 0, mmio_bar, mmio_size;
762 uint32_t aperture_size;
764 info = (struct intel_device_info *) flags;
766 dev_priv = kzalloc(sizeof(*dev_priv), GFP_KERNEL);
767 if (dev_priv == NULL)
770 dev->dev_private = dev_priv;
773 /* Setup the write-once "constant" device info */
774 device_info = (struct intel_device_info *)&dev_priv->info;
775 memcpy(device_info, info, sizeof(dev_priv->info));
776 device_info->device_id = dev->pdev->device;
778 spin_lock_init(&dev_priv->irq_lock);
779 spin_lock_init(&dev_priv->gpu_error.lock);
780 mutex_init(&dev_priv->backlight_lock);
781 spin_lock_init(&dev_priv->uncore.lock);
782 spin_lock_init(&dev_priv->mm.object_stat_lock);
783 spin_lock_init(&dev_priv->mmio_flip_lock);
784 mutex_init(&dev_priv->dpio_lock);
785 mutex_init(&dev_priv->modeset_restore_lock);
789 intel_display_crc_init(dev);
791 i915_dump_device_info(dev_priv);
793 /* Not all pre-production machines fall into this category, only the
794 * very first ones. Almost everything should work, except for maybe
795 * suspend/resume. And we don't implement workarounds that affect only
796 * pre-production machines. */
797 if (IS_HSW_EARLY_SDV(dev))
798 DRM_INFO("This is an early pre-production Haswell machine. "
799 "It may not be fully functional.\n");
801 if (i915_get_bridge_dev(dev)) {
806 mmio_bar = IS_GEN2(dev) ? 1 : 0;
807 /* Before gen4, the registers and the GTT are behind different BARs.
808 * However, from gen4 onwards, the registers and the GTT are shared
809 * in the same BAR, so we want to restrict this ioremap from
810 * clobbering the GTT which we want ioremap_wc instead. Fortunately,
811 * the register BAR remains the same size for all the earlier
812 * generations up to Ironlake.
815 mmio_size = 512*1024;
817 mmio_size = 2*1024*1024;
819 dev_priv->regs = pci_iomap(dev->pdev, mmio_bar, mmio_size);
820 if (!dev_priv->regs) {
821 DRM_ERROR("failed to map registers\n");
826 /* This must be called before any calls to HAS_PCH_* */
827 intel_detect_pch(dev);
829 intel_uncore_init(dev);
831 ret = i915_gem_gtt_init(dev);
835 /* WARNING: Apparently we must kick fbdev drivers before vgacon,
836 * otherwise the vga fbdev driver falls over. */
837 ret = i915_kick_out_firmware_fb(dev_priv);
839 DRM_ERROR("failed to remove conflicting framebuffer drivers\n");
843 ret = i915_kick_out_vgacon(dev_priv);
845 DRM_ERROR("failed to remove conflicting VGA console\n");
849 pci_set_master(dev->pdev);
851 /* overlay on gen2 is broken and can't address above 1G */
853 dma_set_coherent_mask(&dev->pdev->dev, DMA_BIT_MASK(30));
855 /* 965GM sometimes incorrectly writes to hardware status page (HWS)
856 * using 32bit addressing, overwriting memory if HWS is located
859 * The documentation also mentions an issue with undefined
860 * behaviour if any general state is accessed within a page above 4GB,
861 * which also needs to be handled carefully.
863 if (IS_BROADWATER(dev) || IS_CRESTLINE(dev))
864 dma_set_coherent_mask(&dev->pdev->dev, DMA_BIT_MASK(32));
866 aperture_size = dev_priv->gtt.mappable_end;
868 dev_priv->gtt.mappable =
869 io_mapping_create_wc(dev_priv->gtt.mappable_base,
871 if (dev_priv->gtt.mappable == NULL) {
876 dev_priv->gtt.mtrr = arch_phys_wc_add(dev_priv->gtt.mappable_base,
879 /* The i915 workqueue is primarily used for batched retirement of
880 * requests (and thus managing bo) once the task has been completed
881 * by the GPU. i915_gem_retire_requests() is called directly when we
882 * need high-priority retirement, such as waiting for an explicit
885 * It is also used for periodic low-priority events, such as
886 * idle-timers and recording error state.
888 * All tasks on the workqueue are expected to acquire the dev mutex
889 * so there is no point in running more than one instance of the
890 * workqueue at any time. Use an ordered one.
892 dev_priv->wq = alloc_ordered_workqueue("i915", 0);
893 if (dev_priv->wq == NULL) {
894 DRM_ERROR("Failed to create our workqueue.\n");
899 dev_priv->dp_wq = alloc_ordered_workqueue("i915-dp", 0);
900 if (dev_priv->dp_wq == NULL) {
901 DRM_ERROR("Failed to create our dp workqueue.\n");
906 dev_priv->gpu_error.hangcheck_wq =
907 alloc_ordered_workqueue("i915-hangcheck", 0);
908 if (dev_priv->gpu_error.hangcheck_wq == NULL) {
909 DRM_ERROR("Failed to create our hangcheck workqueue.\n");
914 intel_irq_init(dev_priv);
915 intel_uncore_sanitize(dev);
917 /* Try to make sure MCHBAR is enabled before poking at it */
918 intel_setup_mchbar(dev);
919 intel_setup_gmbus(dev);
920 intel_opregion_setup(dev);
922 intel_setup_bios(dev);
926 /* On the 945G/GM, the chipset reports the MSI capability on the
927 * integrated graphics even though the support isn't actually there
928 * according to the published specs. It doesn't appear to function
929 * correctly in testing on 945G.
930 * This may be a side effect of MSI having been made available for PEG
931 * and the registers being closely associated.
933 * According to chipset errata, on the 965GM, MSI interrupts may
934 * be lost or delayed, but we use them anyways to avoid
935 * stuck interrupts on some machines.
937 if (!IS_I945G(dev) && !IS_I945GM(dev))
938 pci_enable_msi(dev->pdev);
940 intel_device_info_runtime_init(dev);
942 if (INTEL_INFO(dev)->num_pipes) {
943 ret = drm_vblank_init(dev, INTEL_INFO(dev)->num_pipes);
948 intel_power_domains_init(dev_priv);
950 ret = i915_load_modeset_init(dev);
952 DRM_ERROR("failed to init modeset\n");
957 * Notify a valid surface after modesetting,
958 * when running inside a VM.
960 if (intel_vgpu_active(dev))
961 I915_WRITE(vgtif_reg(display_ready), VGT_DRV_DISPLAY_READY);
963 i915_setup_sysfs(dev);
965 if (INTEL_INFO(dev)->num_pipes) {
966 /* Must be done after probing outputs */
967 intel_opregion_init(dev);
968 acpi_video_register();
972 intel_gpu_ips_init(dev_priv);
974 intel_runtime_pm_enable(dev_priv);
976 i915_audio_component_init(dev_priv);
981 intel_power_domains_fini(dev_priv);
982 drm_vblank_cleanup(dev);
984 WARN_ON(unregister_oom_notifier(&dev_priv->mm.oom_notifier));
985 unregister_shrinker(&dev_priv->mm.shrinker);
987 if (dev->pdev->msi_enabled)
988 pci_disable_msi(dev->pdev);
990 intel_teardown_gmbus(dev);
991 intel_teardown_mchbar(dev);
992 pm_qos_remove_request(&dev_priv->pm_qos);
993 destroy_workqueue(dev_priv->gpu_error.hangcheck_wq);
995 destroy_workqueue(dev_priv->dp_wq);
997 destroy_workqueue(dev_priv->wq);
999 arch_phys_wc_del(dev_priv->gtt.mtrr);
1000 io_mapping_free(dev_priv->gtt.mappable);
1002 i915_global_gtt_cleanup(dev);
1004 intel_uncore_fini(dev);
1005 pci_iounmap(dev->pdev, dev_priv->regs);
1007 pci_dev_put(dev_priv->bridge_dev);
1010 kmem_cache_destroy(dev_priv->slab);
1015 int i915_driver_unload(struct drm_device *dev)
1017 struct drm_i915_private *dev_priv = dev->dev_private;
1020 i915_audio_component_cleanup(dev_priv);
1022 ret = i915_gem_suspend(dev);
1024 DRM_ERROR("failed to idle hardware: %d\n", ret);
1028 intel_power_domains_fini(dev_priv);
1030 intel_gpu_ips_teardown();
1032 i915_teardown_sysfs(dev);
1034 WARN_ON(unregister_oom_notifier(&dev_priv->mm.oom_notifier));
1035 unregister_shrinker(&dev_priv->mm.shrinker);
1037 io_mapping_free(dev_priv->gtt.mappable);
1038 arch_phys_wc_del(dev_priv->gtt.mtrr);
1040 acpi_video_unregister();
1042 intel_fbdev_fini(dev);
1044 drm_vblank_cleanup(dev);
1046 intel_modeset_cleanup(dev);
1049 * free the memory space allocated for the child device
1050 * config parsed from VBT
1052 if (dev_priv->vbt.child_dev && dev_priv->vbt.child_dev_num) {
1053 kfree(dev_priv->vbt.child_dev);
1054 dev_priv->vbt.child_dev = NULL;
1055 dev_priv->vbt.child_dev_num = 0;
1058 vga_switcheroo_unregister_client(dev->pdev);
1059 vga_client_register(dev->pdev, NULL, NULL, NULL);
1061 /* Free error state after interrupts are fully disabled. */
1062 cancel_delayed_work_sync(&dev_priv->gpu_error.hangcheck_work);
1063 i915_destroy_error_state(dev);
1065 if (dev->pdev->msi_enabled)
1066 pci_disable_msi(dev->pdev);
1068 intel_opregion_fini(dev);
1070 /* Flush any outstanding unpin_work. */
1071 flush_workqueue(dev_priv->wq);
1073 mutex_lock(&dev->struct_mutex);
1074 i915_gem_cleanup_ringbuffer(dev);
1075 i915_gem_batch_pool_fini(&dev_priv->mm.batch_pool);
1076 i915_gem_context_fini(dev);
1077 mutex_unlock(&dev->struct_mutex);
1078 i915_gem_cleanup_stolen(dev);
1080 intel_teardown_gmbus(dev);
1081 intel_teardown_mchbar(dev);
1083 destroy_workqueue(dev_priv->dp_wq);
1084 destroy_workqueue(dev_priv->wq);
1085 destroy_workqueue(dev_priv->gpu_error.hangcheck_wq);
1086 pm_qos_remove_request(&dev_priv->pm_qos);
1088 i915_global_gtt_cleanup(dev);
1090 intel_uncore_fini(dev);
1091 if (dev_priv->regs != NULL)
1092 pci_iounmap(dev->pdev, dev_priv->regs);
1095 kmem_cache_destroy(dev_priv->slab);
1097 pci_dev_put(dev_priv->bridge_dev);
1103 int i915_driver_open(struct drm_device *dev, struct drm_file *file)
1107 ret = i915_gem_open(dev, file);
1115 * i915_driver_lastclose - clean up after all DRM clients have exited
1118 * Take care of cleaning up after all DRM clients have exited. In the
1119 * mode setting case, we want to restore the kernel's initial mode (just
1120 * in case the last client left us in a bad state).
1122 * Additionally, in the non-mode setting case, we'll tear down the GTT
1123 * and DMA structures, since the kernel won't be using them, and clea
1126 void i915_driver_lastclose(struct drm_device *dev)
1128 intel_fbdev_restore_mode(dev);
1129 vga_switcheroo_process_delayed_switch();
1132 void i915_driver_preclose(struct drm_device *dev, struct drm_file *file)
1134 mutex_lock(&dev->struct_mutex);
1135 i915_gem_context_close(dev, file);
1136 i915_gem_release(dev, file);
1137 mutex_unlock(&dev->struct_mutex);
1139 intel_modeset_preclose(dev, file);
1142 void i915_driver_postclose(struct drm_device *dev, struct drm_file *file)
1144 struct drm_i915_file_private *file_priv = file->driver_priv;
1146 if (file_priv && file_priv->bsd_ring)
1147 file_priv->bsd_ring = NULL;
1152 i915_gem_reject_pin_ioctl(struct drm_device *dev, void *data,
1153 struct drm_file *file)
1158 const struct drm_ioctl_desc i915_ioctls[] = {
1159 DRM_IOCTL_DEF_DRV(I915_INIT, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
1160 DRM_IOCTL_DEF_DRV(I915_FLUSH, drm_noop, DRM_AUTH),
1161 DRM_IOCTL_DEF_DRV(I915_FLIP, drm_noop, DRM_AUTH),
1162 DRM_IOCTL_DEF_DRV(I915_BATCHBUFFER, drm_noop, DRM_AUTH),
1163 DRM_IOCTL_DEF_DRV(I915_IRQ_EMIT, drm_noop, DRM_AUTH),
1164 DRM_IOCTL_DEF_DRV(I915_IRQ_WAIT, drm_noop, DRM_AUTH),
1165 DRM_IOCTL_DEF_DRV(I915_GETPARAM, i915_getparam, DRM_AUTH|DRM_RENDER_ALLOW),
1166 DRM_IOCTL_DEF_DRV(I915_SETPARAM, i915_setparam, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
1167 DRM_IOCTL_DEF_DRV(I915_ALLOC, drm_noop, DRM_AUTH),
1168 DRM_IOCTL_DEF_DRV(I915_FREE, drm_noop, DRM_AUTH),
1169 DRM_IOCTL_DEF_DRV(I915_INIT_HEAP, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
1170 DRM_IOCTL_DEF_DRV(I915_CMDBUFFER, drm_noop, DRM_AUTH),
1171 DRM_IOCTL_DEF_DRV(I915_DESTROY_HEAP, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
1172 DRM_IOCTL_DEF_DRV(I915_SET_VBLANK_PIPE, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
1173 DRM_IOCTL_DEF_DRV(I915_GET_VBLANK_PIPE, drm_noop, DRM_AUTH),
1174 DRM_IOCTL_DEF_DRV(I915_VBLANK_SWAP, drm_noop, DRM_AUTH),
1175 DRM_IOCTL_DEF_DRV(I915_HWS_ADDR, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
1176 DRM_IOCTL_DEF_DRV(I915_GEM_INIT, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY|DRM_UNLOCKED),
1177 DRM_IOCTL_DEF_DRV(I915_GEM_EXECBUFFER, i915_gem_execbuffer, DRM_AUTH|DRM_UNLOCKED),
1178 DRM_IOCTL_DEF_DRV(I915_GEM_EXECBUFFER2, i915_gem_execbuffer2, DRM_AUTH|DRM_UNLOCKED|DRM_RENDER_ALLOW),
1179 DRM_IOCTL_DEF_DRV(I915_GEM_PIN, i915_gem_reject_pin_ioctl, DRM_AUTH|DRM_ROOT_ONLY|DRM_UNLOCKED),
1180 DRM_IOCTL_DEF_DRV(I915_GEM_UNPIN, i915_gem_reject_pin_ioctl, DRM_AUTH|DRM_ROOT_ONLY|DRM_UNLOCKED),
1181 DRM_IOCTL_DEF_DRV(I915_GEM_BUSY, i915_gem_busy_ioctl, DRM_AUTH|DRM_UNLOCKED|DRM_RENDER_ALLOW),
1182 DRM_IOCTL_DEF_DRV(I915_GEM_SET_CACHING, i915_gem_set_caching_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW),
1183 DRM_IOCTL_DEF_DRV(I915_GEM_GET_CACHING, i915_gem_get_caching_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW),
1184 DRM_IOCTL_DEF_DRV(I915_GEM_THROTTLE, i915_gem_throttle_ioctl, DRM_AUTH|DRM_UNLOCKED|DRM_RENDER_ALLOW),
1185 DRM_IOCTL_DEF_DRV(I915_GEM_ENTERVT, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY|DRM_UNLOCKED),
1186 DRM_IOCTL_DEF_DRV(I915_GEM_LEAVEVT, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY|DRM_UNLOCKED),
1187 DRM_IOCTL_DEF_DRV(I915_GEM_CREATE, i915_gem_create_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW),
1188 DRM_IOCTL_DEF_DRV(I915_GEM_PREAD, i915_gem_pread_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW),
1189 DRM_IOCTL_DEF_DRV(I915_GEM_PWRITE, i915_gem_pwrite_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW),
1190 DRM_IOCTL_DEF_DRV(I915_GEM_MMAP, i915_gem_mmap_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW),
1191 DRM_IOCTL_DEF_DRV(I915_GEM_MMAP_GTT, i915_gem_mmap_gtt_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW),
1192 DRM_IOCTL_DEF_DRV(I915_GEM_SET_DOMAIN, i915_gem_set_domain_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW),
1193 DRM_IOCTL_DEF_DRV(I915_GEM_SW_FINISH, i915_gem_sw_finish_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW),
1194 DRM_IOCTL_DEF_DRV(I915_GEM_SET_TILING, i915_gem_set_tiling, DRM_UNLOCKED|DRM_RENDER_ALLOW),
1195 DRM_IOCTL_DEF_DRV(I915_GEM_GET_TILING, i915_gem_get_tiling, DRM_UNLOCKED|DRM_RENDER_ALLOW),
1196 DRM_IOCTL_DEF_DRV(I915_GEM_GET_APERTURE, i915_gem_get_aperture_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW),
1197 DRM_IOCTL_DEF_DRV(I915_GET_PIPE_FROM_CRTC_ID, intel_get_pipe_from_crtc_id, DRM_UNLOCKED),
1198 DRM_IOCTL_DEF_DRV(I915_GEM_MADVISE, i915_gem_madvise_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW),
1199 DRM_IOCTL_DEF_DRV(I915_OVERLAY_PUT_IMAGE, intel_overlay_put_image, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
1200 DRM_IOCTL_DEF_DRV(I915_OVERLAY_ATTRS, intel_overlay_attrs, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
1201 DRM_IOCTL_DEF_DRV(I915_SET_SPRITE_COLORKEY, intel_sprite_set_colorkey, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
1202 DRM_IOCTL_DEF_DRV(I915_GET_SPRITE_COLORKEY, drm_noop, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
1203 DRM_IOCTL_DEF_DRV(I915_GEM_WAIT, i915_gem_wait_ioctl, DRM_AUTH|DRM_UNLOCKED|DRM_RENDER_ALLOW),
1204 DRM_IOCTL_DEF_DRV(I915_GEM_CONTEXT_CREATE, i915_gem_context_create_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW),
1205 DRM_IOCTL_DEF_DRV(I915_GEM_CONTEXT_DESTROY, i915_gem_context_destroy_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW),
1206 DRM_IOCTL_DEF_DRV(I915_REG_READ, i915_reg_read_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW),
1207 DRM_IOCTL_DEF_DRV(I915_GET_RESET_STATS, i915_get_reset_stats_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW),
1208 DRM_IOCTL_DEF_DRV(I915_GEM_USERPTR, i915_gem_userptr_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW),
1209 DRM_IOCTL_DEF_DRV(I915_GEM_CONTEXT_GETPARAM, i915_gem_context_getparam_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW),
1210 DRM_IOCTL_DEF_DRV(I915_GEM_CONTEXT_SETPARAM, i915_gem_context_setparam_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW),
1213 int i915_max_ioctl = ARRAY_SIZE(i915_ioctls);
1216 * This is really ugly: Because old userspace abused the linux agp interface to
1217 * manage the gtt, we need to claim that all intel devices are agp. For
1218 * otherwise the drm core refuses to initialize the agp support code.
1220 int i915_driver_device_is_agp(struct drm_device *dev)