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;
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;
166 case I915_PARAM_HAS_GPU_RESET:
167 value = i915.enable_hangcheck &&
168 intel_has_gpu_reset(dev);
170 case I915_PARAM_HAS_RESOURCE_STREAMER:
171 value = HAS_RESOURCE_STREAMER(dev);
174 DRM_DEBUG("Unknown parameter %d\n", param->param);
178 if (copy_to_user(param->value, &value, sizeof(int))) {
179 DRM_ERROR("copy_to_user failed\n");
186 static int i915_get_bridge_dev(struct drm_device *dev)
188 struct drm_i915_private *dev_priv = dev->dev_private;
190 dev_priv->bridge_dev = pci_get_bus_and_slot(0, PCI_DEVFN(0, 0));
191 if (!dev_priv->bridge_dev) {
192 DRM_ERROR("bridge device not found\n");
198 #define MCHBAR_I915 0x44
199 #define MCHBAR_I965 0x48
200 #define MCHBAR_SIZE (4*4096)
202 #define DEVEN_REG 0x54
203 #define DEVEN_MCHBAR_EN (1 << 28)
205 /* Allocate space for the MCH regs if needed, return nonzero on error */
207 intel_alloc_mchbar_resource(struct drm_device *dev)
209 struct drm_i915_private *dev_priv = dev->dev_private;
210 int reg = INTEL_INFO(dev)->gen >= 4 ? MCHBAR_I965 : MCHBAR_I915;
211 u32 temp_lo, temp_hi = 0;
215 if (INTEL_INFO(dev)->gen >= 4)
216 pci_read_config_dword(dev_priv->bridge_dev, reg + 4, &temp_hi);
217 pci_read_config_dword(dev_priv->bridge_dev, reg, &temp_lo);
218 mchbar_addr = ((u64)temp_hi << 32) | temp_lo;
220 /* If ACPI doesn't have it, assume we need to allocate it ourselves */
223 pnp_range_reserved(mchbar_addr, mchbar_addr + MCHBAR_SIZE))
227 /* Get some space for it */
228 dev_priv->mch_res.name = "i915 MCHBAR";
229 dev_priv->mch_res.flags = IORESOURCE_MEM;
230 ret = pci_bus_alloc_resource(dev_priv->bridge_dev->bus,
232 MCHBAR_SIZE, MCHBAR_SIZE,
234 0, pcibios_align_resource,
235 dev_priv->bridge_dev);
237 DRM_DEBUG_DRIVER("failed bus alloc: %d\n", ret);
238 dev_priv->mch_res.start = 0;
242 if (INTEL_INFO(dev)->gen >= 4)
243 pci_write_config_dword(dev_priv->bridge_dev, reg + 4,
244 upper_32_bits(dev_priv->mch_res.start));
246 pci_write_config_dword(dev_priv->bridge_dev, reg,
247 lower_32_bits(dev_priv->mch_res.start));
251 /* Setup MCHBAR if possible, return true if we should disable it again */
253 intel_setup_mchbar(struct drm_device *dev)
255 struct drm_i915_private *dev_priv = dev->dev_private;
256 int mchbar_reg = INTEL_INFO(dev)->gen >= 4 ? MCHBAR_I965 : MCHBAR_I915;
260 if (IS_VALLEYVIEW(dev))
263 dev_priv->mchbar_need_disable = false;
265 if (IS_I915G(dev) || IS_I915GM(dev)) {
266 pci_read_config_dword(dev_priv->bridge_dev, DEVEN_REG, &temp);
267 enabled = !!(temp & DEVEN_MCHBAR_EN);
269 pci_read_config_dword(dev_priv->bridge_dev, mchbar_reg, &temp);
273 /* If it's already enabled, don't have to do anything */
277 if (intel_alloc_mchbar_resource(dev))
280 dev_priv->mchbar_need_disable = true;
282 /* Space is allocated or reserved, so enable it. */
283 if (IS_I915G(dev) || IS_I915GM(dev)) {
284 pci_write_config_dword(dev_priv->bridge_dev, DEVEN_REG,
285 temp | DEVEN_MCHBAR_EN);
287 pci_read_config_dword(dev_priv->bridge_dev, mchbar_reg, &temp);
288 pci_write_config_dword(dev_priv->bridge_dev, mchbar_reg, temp | 1);
293 intel_teardown_mchbar(struct drm_device *dev)
295 struct drm_i915_private *dev_priv = dev->dev_private;
296 int mchbar_reg = INTEL_INFO(dev)->gen >= 4 ? MCHBAR_I965 : MCHBAR_I915;
299 if (dev_priv->mchbar_need_disable) {
300 if (IS_I915G(dev) || IS_I915GM(dev)) {
301 pci_read_config_dword(dev_priv->bridge_dev, DEVEN_REG, &temp);
302 temp &= ~DEVEN_MCHBAR_EN;
303 pci_write_config_dword(dev_priv->bridge_dev, DEVEN_REG, temp);
305 pci_read_config_dword(dev_priv->bridge_dev, mchbar_reg, &temp);
307 pci_write_config_dword(dev_priv->bridge_dev, mchbar_reg, temp);
311 if (dev_priv->mch_res.start)
312 release_resource(&dev_priv->mch_res);
315 /* true = enable decode, false = disable decoder */
316 static unsigned int i915_vga_set_decode(void *cookie, bool state)
318 struct drm_device *dev = cookie;
320 intel_modeset_vga_set_state(dev, state);
322 return VGA_RSRC_LEGACY_IO | VGA_RSRC_LEGACY_MEM |
323 VGA_RSRC_NORMAL_IO | VGA_RSRC_NORMAL_MEM;
325 return VGA_RSRC_NORMAL_IO | VGA_RSRC_NORMAL_MEM;
328 static void i915_switcheroo_set_state(struct pci_dev *pdev, enum vga_switcheroo_state state)
330 struct drm_device *dev = pci_get_drvdata(pdev);
331 pm_message_t pmm = { .event = PM_EVENT_SUSPEND };
333 if (state == VGA_SWITCHEROO_ON) {
334 pr_info("switched on\n");
335 dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;
336 /* i915 resume handler doesn't set to D0 */
337 pci_set_power_state(dev->pdev, PCI_D0);
338 i915_resume_legacy(dev);
339 dev->switch_power_state = DRM_SWITCH_POWER_ON;
341 pr_err("switched off\n");
342 dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;
343 i915_suspend_legacy(dev, pmm);
344 dev->switch_power_state = DRM_SWITCH_POWER_OFF;
348 static bool i915_switcheroo_can_switch(struct pci_dev *pdev)
350 struct drm_device *dev = pci_get_drvdata(pdev);
353 * FIXME: open_count is protected by drm_global_mutex but that would lead to
354 * locking inversion with the driver load path. And the access here is
355 * completely racy anyway. So don't bother with locking for now.
357 return dev->open_count == 0;
360 static const struct vga_switcheroo_client_ops i915_switcheroo_ops = {
361 .set_gpu_state = i915_switcheroo_set_state,
363 .can_switch = i915_switcheroo_can_switch,
366 static int i915_load_modeset_init(struct drm_device *dev)
368 struct drm_i915_private *dev_priv = dev->dev_private;
371 ret = intel_parse_bios(dev);
373 DRM_INFO("failed to find VBIOS tables\n");
375 /* If we have > 1 VGA cards, then we need to arbitrate access
376 * to the common VGA resources.
378 * If we are a secondary display controller (!PCI_DISPLAY_CLASS_VGA),
379 * then we do not take part in VGA arbitration and the
380 * vga_client_register() fails with -ENODEV.
382 ret = vga_client_register(dev->pdev, dev, NULL, i915_vga_set_decode);
383 if (ret && ret != -ENODEV)
386 intel_register_dsm_handler();
388 ret = vga_switcheroo_register_client(dev->pdev, &i915_switcheroo_ops, false);
390 goto cleanup_vga_client;
392 /* Initialise stolen first so that we may reserve preallocated
393 * objects for the BIOS to KMS transition.
395 ret = i915_gem_init_stolen(dev);
397 goto cleanup_vga_switcheroo;
399 intel_power_domains_init_hw(dev_priv);
401 ret = intel_irq_install(dev_priv);
403 goto cleanup_gem_stolen;
405 /* Important: The output setup functions called by modeset_init need
406 * working irqs for e.g. gmbus and dp aux transfers. */
407 intel_modeset_init(dev);
409 ret = i915_gem_init(dev);
413 intel_modeset_gem_init(dev);
415 /* Always safe in the mode setting case. */
416 /* FIXME: do pre/post-mode set stuff in core KMS code */
417 dev->vblank_disable_allowed = true;
418 if (INTEL_INFO(dev)->num_pipes == 0)
421 ret = intel_fbdev_init(dev);
425 /* Only enable hotplug handling once the fbdev is fully set up. */
426 intel_hpd_init(dev_priv);
429 * Some ports require correctly set-up hpd registers for detection to
430 * work properly (leading to ghost connected connector status), e.g. VGA
431 * on gm45. Hence we can only set up the initial fbdev config after hpd
432 * irqs are fully enabled. Now we should scan for the initial config
433 * only once hotplug handling is enabled, but due to screwed-up locking
434 * around kms/fbdev init we can't protect the fdbev initial config
435 * scanning against hotplug events. Hence do this first and ignore the
436 * tiny window where we will loose hotplug notifactions.
438 async_schedule(intel_fbdev_initial_config, dev_priv);
440 drm_kms_helper_poll_init(dev);
445 mutex_lock(&dev->struct_mutex);
446 i915_gem_cleanup_ringbuffer(dev);
447 i915_gem_context_fini(dev);
448 mutex_unlock(&dev->struct_mutex);
450 drm_irq_uninstall(dev);
452 i915_gem_cleanup_stolen(dev);
453 cleanup_vga_switcheroo:
454 vga_switcheroo_unregister_client(dev->pdev);
456 vga_client_register(dev->pdev, NULL, NULL, NULL);
461 #if IS_ENABLED(CONFIG_FB)
462 static int i915_kick_out_firmware_fb(struct drm_i915_private *dev_priv)
464 struct apertures_struct *ap;
465 struct pci_dev *pdev = dev_priv->dev->pdev;
469 ap = alloc_apertures(1);
473 ap->ranges[0].base = dev_priv->gtt.mappable_base;
474 ap->ranges[0].size = dev_priv->gtt.mappable_end;
477 pdev->resource[PCI_ROM_RESOURCE].flags & IORESOURCE_ROM_SHADOW;
479 ret = remove_conflicting_framebuffers(ap, "inteldrmfb", primary);
486 static int i915_kick_out_firmware_fb(struct drm_i915_private *dev_priv)
492 #if !defined(CONFIG_VGA_CONSOLE)
493 static int i915_kick_out_vgacon(struct drm_i915_private *dev_priv)
497 #elif !defined(CONFIG_DUMMY_CONSOLE)
498 static int i915_kick_out_vgacon(struct drm_i915_private *dev_priv)
503 static int i915_kick_out_vgacon(struct drm_i915_private *dev_priv)
507 DRM_INFO("Replacing VGA console driver\n");
510 if (con_is_bound(&vga_con))
511 ret = do_take_over_console(&dummy_con, 0, MAX_NR_CONSOLES - 1, 1);
513 ret = do_unregister_con_driver(&vga_con);
515 /* Ignore "already unregistered". */
525 static void i915_dump_device_info(struct drm_i915_private *dev_priv)
527 const struct intel_device_info *info = &dev_priv->info;
529 #define PRINT_S(name) "%s"
531 #define PRINT_FLAG(name) info->name ? #name "," : ""
533 DRM_DEBUG_DRIVER("i915 device info: gen=%i, pciid=0x%04x rev=0x%02x flags="
534 DEV_INFO_FOR_EACH_FLAG(PRINT_S, SEP_EMPTY),
536 dev_priv->dev->pdev->device,
537 dev_priv->dev->pdev->revision,
538 DEV_INFO_FOR_EACH_FLAG(PRINT_FLAG, SEP_COMMA));
545 static void cherryview_sseu_info_init(struct drm_device *dev)
547 struct drm_i915_private *dev_priv = dev->dev_private;
548 struct intel_device_info *info;
551 info = (struct intel_device_info *)&dev_priv->info;
552 fuse = I915_READ(CHV_FUSE_GT);
554 info->slice_total = 1;
556 if (!(fuse & CHV_FGT_DISABLE_SS0)) {
557 info->subslice_per_slice++;
558 eu_dis = fuse & (CHV_FGT_EU_DIS_SS0_R0_MASK |
559 CHV_FGT_EU_DIS_SS0_R1_MASK);
560 info->eu_total += 8 - hweight32(eu_dis);
563 if (!(fuse & CHV_FGT_DISABLE_SS1)) {
564 info->subslice_per_slice++;
565 eu_dis = fuse & (CHV_FGT_EU_DIS_SS1_R0_MASK |
566 CHV_FGT_EU_DIS_SS1_R1_MASK);
567 info->eu_total += 8 - hweight32(eu_dis);
570 info->subslice_total = info->subslice_per_slice;
572 * CHV expected to always have a uniform distribution of EU
575 info->eu_per_subslice = info->subslice_total ?
576 info->eu_total / info->subslice_total :
579 * CHV supports subslice power gating on devices with more than
580 * one subslice, and supports EU power gating on devices with
581 * more than one EU pair per subslice.
583 info->has_slice_pg = 0;
584 info->has_subslice_pg = (info->subslice_total > 1);
585 info->has_eu_pg = (info->eu_per_subslice > 2);
588 static void gen9_sseu_info_init(struct drm_device *dev)
590 struct drm_i915_private *dev_priv = dev->dev_private;
591 struct intel_device_info *info;
592 int s_max = 3, ss_max = 4, eu_max = 8;
594 u32 fuse2, s_enable, ss_disable, eu_disable;
598 * BXT has a single slice. BXT also has at most 6 EU per subslice,
599 * and therefore only the lowest 6 bits of the 8-bit EU disable
602 if (IS_BROXTON(dev)) {
608 info = (struct intel_device_info *)&dev_priv->info;
609 fuse2 = I915_READ(GEN8_FUSE2);
610 s_enable = (fuse2 & GEN8_F2_S_ENA_MASK) >>
612 ss_disable = (fuse2 & GEN9_F2_SS_DIS_MASK) >>
613 GEN9_F2_SS_DIS_SHIFT;
615 info->slice_total = hweight32(s_enable);
617 * The subslice disable field is global, i.e. it applies
618 * to each of the enabled slices.
620 info->subslice_per_slice = ss_max - hweight32(ss_disable);
621 info->subslice_total = info->slice_total *
622 info->subslice_per_slice;
625 * Iterate through enabled slices and subslices to
626 * count the total enabled EU.
628 for (s = 0; s < s_max; s++) {
629 if (!(s_enable & (0x1 << s)))
630 /* skip disabled slice */
633 eu_disable = I915_READ(GEN9_EU_DISABLE(s));
634 for (ss = 0; ss < ss_max; ss++) {
637 if (ss_disable & (0x1 << ss))
638 /* skip disabled subslice */
641 eu_per_ss = eu_max - hweight8((eu_disable >> (ss*8)) &
645 * Record which subslice(s) has(have) 7 EUs. we
646 * can tune the hash used to spread work among
647 * subslices if they are unbalanced.
650 info->subslice_7eu[s] |= 1 << ss;
652 info->eu_total += eu_per_ss;
657 * SKL is expected to always have a uniform distribution
658 * of EU across subslices with the exception that any one
659 * EU in any one subslice may be fused off for die
660 * recovery. BXT is expected to be perfectly uniform in EU
663 info->eu_per_subslice = info->subslice_total ?
664 DIV_ROUND_UP(info->eu_total,
665 info->subslice_total) : 0;
667 * SKL supports slice power gating on devices with more than
668 * one slice, and supports EU power gating on devices with
669 * more than one EU pair per subslice. BXT supports subslice
670 * power gating on devices with more than one subslice, and
671 * supports EU power gating on devices with more than one EU
674 info->has_slice_pg = (IS_SKYLAKE(dev) && (info->slice_total > 1));
675 info->has_subslice_pg = (IS_BROXTON(dev) && (info->subslice_total > 1));
676 info->has_eu_pg = (info->eu_per_subslice > 2);
680 * Determine various intel_device_info fields at runtime.
682 * Use it when either:
683 * - it's judged too laborious to fill n static structures with the limit
684 * when a simple if statement does the job,
685 * - run-time checks (eg read fuse/strap registers) are needed.
687 * This function needs to be called:
688 * - after the MMIO has been setup as we are reading registers,
689 * - after the PCH has been detected,
690 * - before the first usage of the fields it can tweak.
692 static void intel_device_info_runtime_init(struct drm_device *dev)
694 struct drm_i915_private *dev_priv = dev->dev_private;
695 struct intel_device_info *info;
698 info = (struct intel_device_info *)&dev_priv->info;
701 * Skylake and Broxton currently don't expose the topmost plane as its
702 * use is exclusive with the legacy cursor and we only want to expose
703 * one of those, not both. Until we can safely expose the topmost plane
704 * as a DRM_PLANE_TYPE_CURSOR with all the features exposed/supported,
705 * we don't expose the topmost plane at all to prevent ABI breakage
708 if (IS_BROXTON(dev)) {
709 info->num_sprites[PIPE_A] = 2;
710 info->num_sprites[PIPE_B] = 2;
711 info->num_sprites[PIPE_C] = 1;
712 } else if (IS_VALLEYVIEW(dev))
713 for_each_pipe(dev_priv, pipe)
714 info->num_sprites[pipe] = 2;
716 for_each_pipe(dev_priv, pipe)
717 info->num_sprites[pipe] = 1;
719 if (i915.disable_display) {
720 DRM_INFO("Display disabled (module parameter)\n");
722 } else if (info->num_pipes > 0 &&
723 (INTEL_INFO(dev)->gen == 7 || INTEL_INFO(dev)->gen == 8) &&
724 !IS_VALLEYVIEW(dev)) {
725 u32 fuse_strap = I915_READ(FUSE_STRAP);
726 u32 sfuse_strap = I915_READ(SFUSE_STRAP);
729 * SFUSE_STRAP is supposed to have a bit signalling the display
730 * is fused off. Unfortunately it seems that, at least in
731 * certain cases, fused off display means that PCH display
732 * reads don't land anywhere. In that case, we read 0s.
734 * On CPT/PPT, we can detect this case as SFUSE_STRAP_FUSE_LOCK
735 * should be set when taking over after the firmware.
737 if (fuse_strap & ILK_INTERNAL_DISPLAY_DISABLE ||
738 sfuse_strap & SFUSE_STRAP_DISPLAY_DISABLED ||
739 (dev_priv->pch_type == PCH_CPT &&
740 !(sfuse_strap & SFUSE_STRAP_FUSE_LOCK))) {
741 DRM_INFO("Display fused off, disabling\n");
746 /* Initialize slice/subslice/EU info */
747 if (IS_CHERRYVIEW(dev))
748 cherryview_sseu_info_init(dev);
749 else if (INTEL_INFO(dev)->gen >= 9)
750 gen9_sseu_info_init(dev);
752 DRM_DEBUG_DRIVER("slice total: %u\n", info->slice_total);
753 DRM_DEBUG_DRIVER("subslice total: %u\n", info->subslice_total);
754 DRM_DEBUG_DRIVER("subslice per slice: %u\n", info->subslice_per_slice);
755 DRM_DEBUG_DRIVER("EU total: %u\n", info->eu_total);
756 DRM_DEBUG_DRIVER("EU per subslice: %u\n", info->eu_per_subslice);
757 DRM_DEBUG_DRIVER("has slice power gating: %s\n",
758 info->has_slice_pg ? "y" : "n");
759 DRM_DEBUG_DRIVER("has subslice power gating: %s\n",
760 info->has_subslice_pg ? "y" : "n");
761 DRM_DEBUG_DRIVER("has EU power gating: %s\n",
762 info->has_eu_pg ? "y" : "n");
766 * i915_driver_load - setup chip and create an initial config
768 * @flags: startup flags
770 * The driver load routine has to do several things:
771 * - drive output discovery via intel_modeset_init()
772 * - initialize the memory manager
773 * - allocate initial config memory
774 * - setup the DRM framebuffer with the allocated memory
776 int i915_driver_load(struct drm_device *dev, unsigned long flags)
778 struct drm_i915_private *dev_priv;
779 struct intel_device_info *info, *device_info;
780 int ret = 0, mmio_bar, mmio_size;
781 uint32_t aperture_size;
783 info = (struct intel_device_info *) flags;
785 dev_priv = kzalloc(sizeof(*dev_priv), GFP_KERNEL);
786 if (dev_priv == NULL)
789 dev->dev_private = dev_priv;
792 /* Setup the write-once "constant" device info */
793 device_info = (struct intel_device_info *)&dev_priv->info;
794 memcpy(device_info, info, sizeof(dev_priv->info));
795 device_info->device_id = dev->pdev->device;
797 spin_lock_init(&dev_priv->irq_lock);
798 spin_lock_init(&dev_priv->gpu_error.lock);
799 mutex_init(&dev_priv->backlight_lock);
800 spin_lock_init(&dev_priv->uncore.lock);
801 spin_lock_init(&dev_priv->mm.object_stat_lock);
802 spin_lock_init(&dev_priv->mmio_flip_lock);
803 mutex_init(&dev_priv->sb_lock);
804 mutex_init(&dev_priv->modeset_restore_lock);
805 mutex_init(&dev_priv->csr_lock);
809 intel_display_crc_init(dev);
811 i915_dump_device_info(dev_priv);
813 /* Not all pre-production machines fall into this category, only the
814 * very first ones. Almost everything should work, except for maybe
815 * suspend/resume. And we don't implement workarounds that affect only
816 * pre-production machines. */
817 if (IS_HSW_EARLY_SDV(dev))
818 DRM_INFO("This is an early pre-production Haswell machine. "
819 "It may not be fully functional.\n");
821 if (i915_get_bridge_dev(dev)) {
826 mmio_bar = IS_GEN2(dev) ? 1 : 0;
827 /* Before gen4, the registers and the GTT are behind different BARs.
828 * However, from gen4 onwards, the registers and the GTT are shared
829 * in the same BAR, so we want to restrict this ioremap from
830 * clobbering the GTT which we want ioremap_wc instead. Fortunately,
831 * the register BAR remains the same size for all the earlier
832 * generations up to Ironlake.
835 mmio_size = 512*1024;
837 mmio_size = 2*1024*1024;
839 dev_priv->regs = pci_iomap(dev->pdev, mmio_bar, mmio_size);
840 if (!dev_priv->regs) {
841 DRM_ERROR("failed to map registers\n");
846 /* This must be called before any calls to HAS_PCH_* */
847 intel_detect_pch(dev);
849 intel_uncore_init(dev);
851 /* Load CSR Firmware for SKL */
852 intel_csr_ucode_init(dev);
854 ret = i915_gem_gtt_init(dev);
858 /* WARNING: Apparently we must kick fbdev drivers before vgacon,
859 * otherwise the vga fbdev driver falls over. */
860 ret = i915_kick_out_firmware_fb(dev_priv);
862 DRM_ERROR("failed to remove conflicting framebuffer drivers\n");
866 ret = i915_kick_out_vgacon(dev_priv);
868 DRM_ERROR("failed to remove conflicting VGA console\n");
872 pci_set_master(dev->pdev);
874 /* overlay on gen2 is broken and can't address above 1G */
876 dma_set_coherent_mask(&dev->pdev->dev, DMA_BIT_MASK(30));
878 /* 965GM sometimes incorrectly writes to hardware status page (HWS)
879 * using 32bit addressing, overwriting memory if HWS is located
882 * The documentation also mentions an issue with undefined
883 * behaviour if any general state is accessed within a page above 4GB,
884 * which also needs to be handled carefully.
886 if (IS_BROADWATER(dev) || IS_CRESTLINE(dev))
887 dma_set_coherent_mask(&dev->pdev->dev, DMA_BIT_MASK(32));
889 aperture_size = dev_priv->gtt.mappable_end;
891 dev_priv->gtt.mappable =
892 io_mapping_create_wc(dev_priv->gtt.mappable_base,
894 if (dev_priv->gtt.mappable == NULL) {
899 dev_priv->gtt.mtrr = arch_phys_wc_add(dev_priv->gtt.mappable_base,
902 /* The i915 workqueue is primarily used for batched retirement of
903 * requests (and thus managing bo) once the task has been completed
904 * by the GPU. i915_gem_retire_requests() is called directly when we
905 * need high-priority retirement, such as waiting for an explicit
908 * It is also used for periodic low-priority events, such as
909 * idle-timers and recording error state.
911 * All tasks on the workqueue are expected to acquire the dev mutex
912 * so there is no point in running more than one instance of the
913 * workqueue at any time. Use an ordered one.
915 dev_priv->wq = alloc_ordered_workqueue("i915", 0);
916 if (dev_priv->wq == NULL) {
917 DRM_ERROR("Failed to create our workqueue.\n");
922 dev_priv->hotplug.dp_wq = alloc_ordered_workqueue("i915-dp", 0);
923 if (dev_priv->hotplug.dp_wq == NULL) {
924 DRM_ERROR("Failed to create our dp workqueue.\n");
929 dev_priv->gpu_error.hangcheck_wq =
930 alloc_ordered_workqueue("i915-hangcheck", 0);
931 if (dev_priv->gpu_error.hangcheck_wq == NULL) {
932 DRM_ERROR("Failed to create our hangcheck workqueue.\n");
937 intel_irq_init(dev_priv);
938 intel_uncore_sanitize(dev);
940 /* Try to make sure MCHBAR is enabled before poking at it */
941 intel_setup_mchbar(dev);
942 intel_setup_gmbus(dev);
943 intel_opregion_setup(dev);
945 intel_setup_bios(dev);
949 /* On the 945G/GM, the chipset reports the MSI capability on the
950 * integrated graphics even though the support isn't actually there
951 * according to the published specs. It doesn't appear to function
952 * correctly in testing on 945G.
953 * This may be a side effect of MSI having been made available for PEG
954 * and the registers being closely associated.
956 * According to chipset errata, on the 965GM, MSI interrupts may
957 * be lost or delayed, but we use them anyways to avoid
958 * stuck interrupts on some machines.
960 if (!IS_I945G(dev) && !IS_I945GM(dev))
961 pci_enable_msi(dev->pdev);
963 intel_device_info_runtime_init(dev);
965 if (INTEL_INFO(dev)->num_pipes) {
966 ret = drm_vblank_init(dev, INTEL_INFO(dev)->num_pipes);
971 intel_power_domains_init(dev_priv);
973 ret = i915_load_modeset_init(dev);
975 DRM_ERROR("failed to init modeset\n");
980 * Notify a valid surface after modesetting,
981 * when running inside a VM.
983 if (intel_vgpu_active(dev))
984 I915_WRITE(vgtif_reg(display_ready), VGT_DRV_DISPLAY_READY);
986 i915_setup_sysfs(dev);
988 if (INTEL_INFO(dev)->num_pipes) {
989 /* Must be done after probing outputs */
990 intel_opregion_init(dev);
991 acpi_video_register();
995 intel_gpu_ips_init(dev_priv);
997 intel_runtime_pm_enable(dev_priv);
999 i915_audio_component_init(dev_priv);
1004 intel_power_domains_fini(dev_priv);
1005 drm_vblank_cleanup(dev);
1007 WARN_ON(unregister_oom_notifier(&dev_priv->mm.oom_notifier));
1008 unregister_shrinker(&dev_priv->mm.shrinker);
1010 if (dev->pdev->msi_enabled)
1011 pci_disable_msi(dev->pdev);
1013 intel_teardown_gmbus(dev);
1014 intel_teardown_mchbar(dev);
1015 pm_qos_remove_request(&dev_priv->pm_qos);
1016 destroy_workqueue(dev_priv->gpu_error.hangcheck_wq);
1018 destroy_workqueue(dev_priv->hotplug.dp_wq);
1020 destroy_workqueue(dev_priv->wq);
1022 arch_phys_wc_del(dev_priv->gtt.mtrr);
1023 io_mapping_free(dev_priv->gtt.mappable);
1025 i915_global_gtt_cleanup(dev);
1027 intel_csr_ucode_fini(dev);
1028 intel_uncore_fini(dev);
1029 pci_iounmap(dev->pdev, dev_priv->regs);
1031 pci_dev_put(dev_priv->bridge_dev);
1033 if (dev_priv->requests)
1034 kmem_cache_destroy(dev_priv->requests);
1036 kmem_cache_destroy(dev_priv->vmas);
1037 if (dev_priv->objects)
1038 kmem_cache_destroy(dev_priv->objects);
1043 int i915_driver_unload(struct drm_device *dev)
1045 struct drm_i915_private *dev_priv = dev->dev_private;
1048 i915_audio_component_cleanup(dev_priv);
1050 ret = i915_gem_suspend(dev);
1052 DRM_ERROR("failed to idle hardware: %d\n", ret);
1056 intel_power_domains_fini(dev_priv);
1058 intel_gpu_ips_teardown();
1060 i915_teardown_sysfs(dev);
1062 WARN_ON(unregister_oom_notifier(&dev_priv->mm.oom_notifier));
1063 unregister_shrinker(&dev_priv->mm.shrinker);
1065 io_mapping_free(dev_priv->gtt.mappable);
1066 arch_phys_wc_del(dev_priv->gtt.mtrr);
1068 acpi_video_unregister();
1070 intel_fbdev_fini(dev);
1072 drm_vblank_cleanup(dev);
1074 intel_modeset_cleanup(dev);
1077 * free the memory space allocated for the child device
1078 * config parsed from VBT
1080 if (dev_priv->vbt.child_dev && dev_priv->vbt.child_dev_num) {
1081 kfree(dev_priv->vbt.child_dev);
1082 dev_priv->vbt.child_dev = NULL;
1083 dev_priv->vbt.child_dev_num = 0;
1086 vga_switcheroo_unregister_client(dev->pdev);
1087 vga_client_register(dev->pdev, NULL, NULL, NULL);
1089 /* Free error state after interrupts are fully disabled. */
1090 cancel_delayed_work_sync(&dev_priv->gpu_error.hangcheck_work);
1091 i915_destroy_error_state(dev);
1093 if (dev->pdev->msi_enabled)
1094 pci_disable_msi(dev->pdev);
1096 intel_opregion_fini(dev);
1098 /* Flush any outstanding unpin_work. */
1099 flush_workqueue(dev_priv->wq);
1101 mutex_lock(&dev->struct_mutex);
1102 i915_gem_cleanup_ringbuffer(dev);
1103 i915_gem_context_fini(dev);
1104 mutex_unlock(&dev->struct_mutex);
1105 intel_fbc_cleanup_cfb(dev_priv);
1106 i915_gem_cleanup_stolen(dev);
1108 intel_csr_ucode_fini(dev);
1110 intel_teardown_gmbus(dev);
1111 intel_teardown_mchbar(dev);
1113 destroy_workqueue(dev_priv->hotplug.dp_wq);
1114 destroy_workqueue(dev_priv->wq);
1115 destroy_workqueue(dev_priv->gpu_error.hangcheck_wq);
1116 pm_qos_remove_request(&dev_priv->pm_qos);
1118 i915_global_gtt_cleanup(dev);
1120 intel_uncore_fini(dev);
1121 if (dev_priv->regs != NULL)
1122 pci_iounmap(dev->pdev, dev_priv->regs);
1124 if (dev_priv->requests)
1125 kmem_cache_destroy(dev_priv->requests);
1127 kmem_cache_destroy(dev_priv->vmas);
1128 if (dev_priv->objects)
1129 kmem_cache_destroy(dev_priv->objects);
1131 pci_dev_put(dev_priv->bridge_dev);
1137 int i915_driver_open(struct drm_device *dev, struct drm_file *file)
1141 ret = i915_gem_open(dev, file);
1149 * i915_driver_lastclose - clean up after all DRM clients have exited
1152 * Take care of cleaning up after all DRM clients have exited. In the
1153 * mode setting case, we want to restore the kernel's initial mode (just
1154 * in case the last client left us in a bad state).
1156 * Additionally, in the non-mode setting case, we'll tear down the GTT
1157 * and DMA structures, since the kernel won't be using them, and clea
1160 void i915_driver_lastclose(struct drm_device *dev)
1162 intel_fbdev_restore_mode(dev);
1163 vga_switcheroo_process_delayed_switch();
1166 void i915_driver_preclose(struct drm_device *dev, struct drm_file *file)
1168 mutex_lock(&dev->struct_mutex);
1169 i915_gem_context_close(dev, file);
1170 i915_gem_release(dev, file);
1171 mutex_unlock(&dev->struct_mutex);
1173 intel_modeset_preclose(dev, file);
1176 void i915_driver_postclose(struct drm_device *dev, struct drm_file *file)
1178 struct drm_i915_file_private *file_priv = file->driver_priv;
1180 if (file_priv && file_priv->bsd_ring)
1181 file_priv->bsd_ring = NULL;
1186 i915_gem_reject_pin_ioctl(struct drm_device *dev, void *data,
1187 struct drm_file *file)
1192 const struct drm_ioctl_desc i915_ioctls[] = {
1193 DRM_IOCTL_DEF_DRV(I915_INIT, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
1194 DRM_IOCTL_DEF_DRV(I915_FLUSH, drm_noop, DRM_AUTH),
1195 DRM_IOCTL_DEF_DRV(I915_FLIP, drm_noop, DRM_AUTH),
1196 DRM_IOCTL_DEF_DRV(I915_BATCHBUFFER, drm_noop, DRM_AUTH),
1197 DRM_IOCTL_DEF_DRV(I915_IRQ_EMIT, drm_noop, DRM_AUTH),
1198 DRM_IOCTL_DEF_DRV(I915_IRQ_WAIT, drm_noop, DRM_AUTH),
1199 DRM_IOCTL_DEF_DRV(I915_GETPARAM, i915_getparam, DRM_AUTH|DRM_RENDER_ALLOW),
1200 DRM_IOCTL_DEF_DRV(I915_SETPARAM, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
1201 DRM_IOCTL_DEF_DRV(I915_ALLOC, drm_noop, DRM_AUTH),
1202 DRM_IOCTL_DEF_DRV(I915_FREE, drm_noop, DRM_AUTH),
1203 DRM_IOCTL_DEF_DRV(I915_INIT_HEAP, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
1204 DRM_IOCTL_DEF_DRV(I915_CMDBUFFER, drm_noop, DRM_AUTH),
1205 DRM_IOCTL_DEF_DRV(I915_DESTROY_HEAP, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
1206 DRM_IOCTL_DEF_DRV(I915_SET_VBLANK_PIPE, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
1207 DRM_IOCTL_DEF_DRV(I915_GET_VBLANK_PIPE, drm_noop, DRM_AUTH),
1208 DRM_IOCTL_DEF_DRV(I915_VBLANK_SWAP, drm_noop, DRM_AUTH),
1209 DRM_IOCTL_DEF_DRV(I915_HWS_ADDR, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
1210 DRM_IOCTL_DEF_DRV(I915_GEM_INIT, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
1211 DRM_IOCTL_DEF_DRV(I915_GEM_EXECBUFFER, i915_gem_execbuffer, DRM_AUTH),
1212 DRM_IOCTL_DEF_DRV(I915_GEM_EXECBUFFER2, i915_gem_execbuffer2, DRM_AUTH|DRM_RENDER_ALLOW),
1213 DRM_IOCTL_DEF_DRV(I915_GEM_PIN, i915_gem_reject_pin_ioctl, DRM_AUTH|DRM_ROOT_ONLY),
1214 DRM_IOCTL_DEF_DRV(I915_GEM_UNPIN, i915_gem_reject_pin_ioctl, DRM_AUTH|DRM_ROOT_ONLY),
1215 DRM_IOCTL_DEF_DRV(I915_GEM_BUSY, i915_gem_busy_ioctl, DRM_AUTH|DRM_RENDER_ALLOW),
1216 DRM_IOCTL_DEF_DRV(I915_GEM_SET_CACHING, i915_gem_set_caching_ioctl, DRM_RENDER_ALLOW),
1217 DRM_IOCTL_DEF_DRV(I915_GEM_GET_CACHING, i915_gem_get_caching_ioctl, DRM_RENDER_ALLOW),
1218 DRM_IOCTL_DEF_DRV(I915_GEM_THROTTLE, i915_gem_throttle_ioctl, DRM_AUTH|DRM_RENDER_ALLOW),
1219 DRM_IOCTL_DEF_DRV(I915_GEM_ENTERVT, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
1220 DRM_IOCTL_DEF_DRV(I915_GEM_LEAVEVT, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
1221 DRM_IOCTL_DEF_DRV(I915_GEM_CREATE, i915_gem_create_ioctl, DRM_RENDER_ALLOW),
1222 DRM_IOCTL_DEF_DRV(I915_GEM_PREAD, i915_gem_pread_ioctl, DRM_RENDER_ALLOW),
1223 DRM_IOCTL_DEF_DRV(I915_GEM_PWRITE, i915_gem_pwrite_ioctl, DRM_RENDER_ALLOW),
1224 DRM_IOCTL_DEF_DRV(I915_GEM_MMAP, i915_gem_mmap_ioctl, DRM_RENDER_ALLOW),
1225 DRM_IOCTL_DEF_DRV(I915_GEM_MMAP_GTT, i915_gem_mmap_gtt_ioctl, DRM_RENDER_ALLOW),
1226 DRM_IOCTL_DEF_DRV(I915_GEM_SET_DOMAIN, i915_gem_set_domain_ioctl, DRM_RENDER_ALLOW),
1227 DRM_IOCTL_DEF_DRV(I915_GEM_SW_FINISH, i915_gem_sw_finish_ioctl, DRM_RENDER_ALLOW),
1228 DRM_IOCTL_DEF_DRV(I915_GEM_SET_TILING, i915_gem_set_tiling, DRM_RENDER_ALLOW),
1229 DRM_IOCTL_DEF_DRV(I915_GEM_GET_TILING, i915_gem_get_tiling, DRM_RENDER_ALLOW),
1230 DRM_IOCTL_DEF_DRV(I915_GEM_GET_APERTURE, i915_gem_get_aperture_ioctl, DRM_RENDER_ALLOW),
1231 DRM_IOCTL_DEF_DRV(I915_GET_PIPE_FROM_CRTC_ID, intel_get_pipe_from_crtc_id, 0),
1232 DRM_IOCTL_DEF_DRV(I915_GEM_MADVISE, i915_gem_madvise_ioctl, DRM_RENDER_ALLOW),
1233 DRM_IOCTL_DEF_DRV(I915_OVERLAY_PUT_IMAGE, intel_overlay_put_image, DRM_MASTER|DRM_CONTROL_ALLOW),
1234 DRM_IOCTL_DEF_DRV(I915_OVERLAY_ATTRS, intel_overlay_attrs, DRM_MASTER|DRM_CONTROL_ALLOW),
1235 DRM_IOCTL_DEF_DRV(I915_SET_SPRITE_COLORKEY, intel_sprite_set_colorkey, DRM_MASTER|DRM_CONTROL_ALLOW),
1236 DRM_IOCTL_DEF_DRV(I915_GET_SPRITE_COLORKEY, drm_noop, DRM_MASTER|DRM_CONTROL_ALLOW),
1237 DRM_IOCTL_DEF_DRV(I915_GEM_WAIT, i915_gem_wait_ioctl, DRM_AUTH|DRM_RENDER_ALLOW),
1238 DRM_IOCTL_DEF_DRV(I915_GEM_CONTEXT_CREATE, i915_gem_context_create_ioctl, DRM_RENDER_ALLOW),
1239 DRM_IOCTL_DEF_DRV(I915_GEM_CONTEXT_DESTROY, i915_gem_context_destroy_ioctl, DRM_RENDER_ALLOW),
1240 DRM_IOCTL_DEF_DRV(I915_REG_READ, i915_reg_read_ioctl, DRM_RENDER_ALLOW),
1241 DRM_IOCTL_DEF_DRV(I915_GET_RESET_STATS, i915_get_reset_stats_ioctl, DRM_RENDER_ALLOW),
1242 DRM_IOCTL_DEF_DRV(I915_GEM_USERPTR, i915_gem_userptr_ioctl, DRM_RENDER_ALLOW),
1243 DRM_IOCTL_DEF_DRV(I915_GEM_CONTEXT_GETPARAM, i915_gem_context_getparam_ioctl, DRM_RENDER_ALLOW),
1244 DRM_IOCTL_DEF_DRV(I915_GEM_CONTEXT_SETPARAM, i915_gem_context_setparam_ioctl, DRM_RENDER_ALLOW),
1247 int i915_max_ioctl = ARRAY_SIZE(i915_ioctls);