/* i915_dma.c -- DMA support for the I915 -*- linux-c -*- */ /* * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas. * All Rights Reserved. * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sub license, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice (including the * next paragraph) shall be included in all copies or substantial portions * of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. * */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt #include #include #include #include #include #include "intel_drv.h" #include #include "i915_drv.h" #include "i915_vgpu.h" #include "i915_trace.h" #include #include #include #include #include #include #include #include #include #include #include #include static int i915_getparam(struct drm_device *dev, void *data, struct drm_file *file_priv) { struct drm_i915_private *dev_priv = dev->dev_private; drm_i915_getparam_t *param = data; int value; switch (param->param) { case I915_PARAM_IRQ_ACTIVE: case I915_PARAM_ALLOW_BATCHBUFFER: case I915_PARAM_LAST_DISPATCH: /* Reject all old ums/dri params. */ return -ENODEV; case I915_PARAM_CHIPSET_ID: value = dev->pdev->device; break; case I915_PARAM_REVISION: value = dev->pdev->revision; break; case I915_PARAM_HAS_GEM: value = 1; break; case I915_PARAM_NUM_FENCES_AVAIL: value = dev_priv->num_fence_regs - dev_priv->fence_reg_start; break; case I915_PARAM_HAS_OVERLAY: value = dev_priv->overlay ? 1 : 0; break; case I915_PARAM_HAS_PAGEFLIPPING: value = 1; break; case I915_PARAM_HAS_EXECBUF2: /* depends on GEM */ value = 1; break; case I915_PARAM_HAS_BSD: value = intel_ring_initialized(&dev_priv->ring[VCS]); break; case I915_PARAM_HAS_BLT: value = intel_ring_initialized(&dev_priv->ring[BCS]); break; case I915_PARAM_HAS_VEBOX: value = intel_ring_initialized(&dev_priv->ring[VECS]); break; case I915_PARAM_HAS_BSD2: value = intel_ring_initialized(&dev_priv->ring[VCS2]); break; case I915_PARAM_HAS_RELAXED_FENCING: value = 1; break; case I915_PARAM_HAS_COHERENT_RINGS: value = 1; break; case I915_PARAM_HAS_EXEC_CONSTANTS: value = INTEL_INFO(dev)->gen >= 4; break; case I915_PARAM_HAS_RELAXED_DELTA: value = 1; break; case I915_PARAM_HAS_GEN7_SOL_RESET: value = 1; break; case I915_PARAM_HAS_LLC: value = HAS_LLC(dev); break; case I915_PARAM_HAS_WT: value = HAS_WT(dev); break; case I915_PARAM_HAS_ALIASING_PPGTT: value = USES_PPGTT(dev); break; case I915_PARAM_HAS_WAIT_TIMEOUT: value = 1; break; case I915_PARAM_HAS_SEMAPHORES: value = i915_semaphore_is_enabled(dev); break; case I915_PARAM_HAS_PRIME_VMAP_FLUSH: value = 1; break; case I915_PARAM_HAS_SECURE_BATCHES: value = capable(CAP_SYS_ADMIN); break; case I915_PARAM_HAS_PINNED_BATCHES: value = 1; break; case I915_PARAM_HAS_EXEC_NO_RELOC: value = 1; break; case I915_PARAM_HAS_EXEC_HANDLE_LUT: value = 1; break; case I915_PARAM_CMD_PARSER_VERSION: value = i915_cmd_parser_get_version(); break; case I915_PARAM_HAS_COHERENT_PHYS_GTT: value = 1; break; case I915_PARAM_MMAP_VERSION: value = 1; break; case I915_PARAM_SUBSLICE_TOTAL: value = INTEL_INFO(dev)->subslice_total; if (!value) return -ENODEV; break; case I915_PARAM_EU_TOTAL: value = INTEL_INFO(dev)->eu_total; if (!value) return -ENODEV; break; case I915_PARAM_HAS_GPU_RESET: value = i915.enable_hangcheck && intel_has_gpu_reset(dev); break; case I915_PARAM_HAS_RESOURCE_STREAMER: value = HAS_RESOURCE_STREAMER(dev); break; default: DRM_DEBUG("Unknown parameter %d\n", param->param); return -EINVAL; } if (copy_to_user(param->value, &value, sizeof(int))) { DRM_ERROR("copy_to_user failed\n"); return -EFAULT; } return 0; } static int i915_setparam(struct drm_device *dev, void *data, struct drm_file *file_priv) { struct drm_i915_private *dev_priv = dev->dev_private; drm_i915_setparam_t *param = data; switch (param->param) { case I915_SETPARAM_USE_MI_BATCHBUFFER_START: case I915_SETPARAM_TEX_LRU_LOG_GRANULARITY: case I915_SETPARAM_ALLOW_BATCHBUFFER: /* Reject all old ums/dri params. */ return -ENODEV; case I915_SETPARAM_NUM_USED_FENCES: if (param->value > dev_priv->num_fence_regs || param->value < 0) return -EINVAL; /* Userspace can use first N regs */ dev_priv->fence_reg_start = param->value; break; default: DRM_DEBUG_DRIVER("unknown parameter %d\n", param->param); return -EINVAL; } return 0; } static int i915_get_bridge_dev(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; dev_priv->bridge_dev = pci_get_bus_and_slot(0, PCI_DEVFN(0, 0)); if (!dev_priv->bridge_dev) { DRM_ERROR("bridge device not found\n"); return -1; } return 0; } #define MCHBAR_I915 0x44 #define MCHBAR_I965 0x48 #define MCHBAR_SIZE (4*4096) #define DEVEN_REG 0x54 #define DEVEN_MCHBAR_EN (1 << 28) /* Allocate space for the MCH regs if needed, return nonzero on error */ static int intel_alloc_mchbar_resource(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; int reg = INTEL_INFO(dev)->gen >= 4 ? MCHBAR_I965 : MCHBAR_I915; u32 temp_lo, temp_hi = 0; u64 mchbar_addr; int ret; if (INTEL_INFO(dev)->gen >= 4) pci_read_config_dword(dev_priv->bridge_dev, reg + 4, &temp_hi); pci_read_config_dword(dev_priv->bridge_dev, reg, &temp_lo); mchbar_addr = ((u64)temp_hi << 32) | temp_lo; /* If ACPI doesn't have it, assume we need to allocate it ourselves */ #ifdef CONFIG_PNP if (mchbar_addr && pnp_range_reserved(mchbar_addr, mchbar_addr + MCHBAR_SIZE)) return 0; #endif /* Get some space for it */ dev_priv->mch_res.name = "i915 MCHBAR"; dev_priv->mch_res.flags = IORESOURCE_MEM; ret = pci_bus_alloc_resource(dev_priv->bridge_dev->bus, &dev_priv->mch_res, MCHBAR_SIZE, MCHBAR_SIZE, PCIBIOS_MIN_MEM, 0, pcibios_align_resource, dev_priv->bridge_dev); if (ret) { DRM_DEBUG_DRIVER("failed bus alloc: %d\n", ret); dev_priv->mch_res.start = 0; return ret; } if (INTEL_INFO(dev)->gen >= 4) pci_write_config_dword(dev_priv->bridge_dev, reg + 4, upper_32_bits(dev_priv->mch_res.start)); pci_write_config_dword(dev_priv->bridge_dev, reg, lower_32_bits(dev_priv->mch_res.start)); return 0; } /* Setup MCHBAR if possible, return true if we should disable it again */ static void intel_setup_mchbar(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; int mchbar_reg = INTEL_INFO(dev)->gen >= 4 ? MCHBAR_I965 : MCHBAR_I915; u32 temp; bool enabled; if (IS_VALLEYVIEW(dev)) return; dev_priv->mchbar_need_disable = false; if (IS_I915G(dev) || IS_I915GM(dev)) { pci_read_config_dword(dev_priv->bridge_dev, DEVEN_REG, &temp); enabled = !!(temp & DEVEN_MCHBAR_EN); } else { pci_read_config_dword(dev_priv->bridge_dev, mchbar_reg, &temp); enabled = temp & 1; } /* If it's already enabled, don't have to do anything */ if (enabled) return; if (intel_alloc_mchbar_resource(dev)) return; dev_priv->mchbar_need_disable = true; /* Space is allocated or reserved, so enable it. */ if (IS_I915G(dev) || IS_I915GM(dev)) { pci_write_config_dword(dev_priv->bridge_dev, DEVEN_REG, temp | DEVEN_MCHBAR_EN); } else { pci_read_config_dword(dev_priv->bridge_dev, mchbar_reg, &temp); pci_write_config_dword(dev_priv->bridge_dev, mchbar_reg, temp | 1); } } static void intel_teardown_mchbar(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; int mchbar_reg = INTEL_INFO(dev)->gen >= 4 ? MCHBAR_I965 : MCHBAR_I915; u32 temp; if (dev_priv->mchbar_need_disable) { if (IS_I915G(dev) || IS_I915GM(dev)) { pci_read_config_dword(dev_priv->bridge_dev, DEVEN_REG, &temp); temp &= ~DEVEN_MCHBAR_EN; pci_write_config_dword(dev_priv->bridge_dev, DEVEN_REG, temp); } else { pci_read_config_dword(dev_priv->bridge_dev, mchbar_reg, &temp); temp &= ~1; pci_write_config_dword(dev_priv->bridge_dev, mchbar_reg, temp); } } if (dev_priv->mch_res.start) release_resource(&dev_priv->mch_res); } /* true = enable decode, false = disable decoder */ static unsigned int i915_vga_set_decode(void *cookie, bool state) { struct drm_device *dev = cookie; intel_modeset_vga_set_state(dev, state); if (state) return VGA_RSRC_LEGACY_IO | VGA_RSRC_LEGACY_MEM | VGA_RSRC_NORMAL_IO | VGA_RSRC_NORMAL_MEM; else return VGA_RSRC_NORMAL_IO | VGA_RSRC_NORMAL_MEM; } static void i915_switcheroo_set_state(struct pci_dev *pdev, enum vga_switcheroo_state state) { struct drm_device *dev = pci_get_drvdata(pdev); pm_message_t pmm = { .event = PM_EVENT_SUSPEND }; if (state == VGA_SWITCHEROO_ON) { pr_info("switched on\n"); dev->switch_power_state = DRM_SWITCH_POWER_CHANGING; /* i915 resume handler doesn't set to D0 */ pci_set_power_state(dev->pdev, PCI_D0); i915_resume_legacy(dev); dev->switch_power_state = DRM_SWITCH_POWER_ON; } else { pr_err("switched off\n"); dev->switch_power_state = DRM_SWITCH_POWER_CHANGING; i915_suspend_legacy(dev, pmm); dev->switch_power_state = DRM_SWITCH_POWER_OFF; } } static bool i915_switcheroo_can_switch(struct pci_dev *pdev) { struct drm_device *dev = pci_get_drvdata(pdev); /* * FIXME: open_count is protected by drm_global_mutex but that would lead to * locking inversion with the driver load path. And the access here is * completely racy anyway. So don't bother with locking for now. */ return dev->open_count == 0; } static const struct vga_switcheroo_client_ops i915_switcheroo_ops = { .set_gpu_state = i915_switcheroo_set_state, .reprobe = NULL, .can_switch = i915_switcheroo_can_switch, }; static int i915_load_modeset_init(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; int ret; ret = intel_parse_bios(dev); if (ret) DRM_INFO("failed to find VBIOS tables\n"); /* If we have > 1 VGA cards, then we need to arbitrate access * to the common VGA resources. * * If we are a secondary display controller (!PCI_DISPLAY_CLASS_VGA), * then we do not take part in VGA arbitration and the * vga_client_register() fails with -ENODEV. */ ret = vga_client_register(dev->pdev, dev, NULL, i915_vga_set_decode); if (ret && ret != -ENODEV) goto out; intel_register_dsm_handler(); ret = vga_switcheroo_register_client(dev->pdev, &i915_switcheroo_ops, false); if (ret) goto cleanup_vga_client; /* Initialise stolen first so that we may reserve preallocated * objects for the BIOS to KMS transition. */ ret = i915_gem_init_stolen(dev); if (ret) goto cleanup_vga_switcheroo; intel_power_domains_init_hw(dev_priv); ret = intel_irq_install(dev_priv); if (ret) goto cleanup_gem_stolen; /* Important: The output setup functions called by modeset_init need * working irqs for e.g. gmbus and dp aux transfers. */ intel_modeset_init(dev); ret = i915_gem_init(dev); if (ret) goto cleanup_irq; intel_modeset_gem_init(dev); /* Always safe in the mode setting case. */ /* FIXME: do pre/post-mode set stuff in core KMS code */ dev->vblank_disable_allowed = true; if (INTEL_INFO(dev)->num_pipes == 0) return 0; ret = intel_fbdev_init(dev); if (ret) goto cleanup_gem; /* Only enable hotplug handling once the fbdev is fully set up. */ intel_hpd_init(dev_priv); /* * Some ports require correctly set-up hpd registers for detection to * work properly (leading to ghost connected connector status), e.g. VGA * on gm45. Hence we can only set up the initial fbdev config after hpd * irqs are fully enabled. Now we should scan for the initial config * only once hotplug handling is enabled, but due to screwed-up locking * around kms/fbdev init we can't protect the fdbev initial config * scanning against hotplug events. Hence do this first and ignore the * tiny window where we will loose hotplug notifactions. */ async_schedule(intel_fbdev_initial_config, dev_priv); drm_kms_helper_poll_init(dev); return 0; cleanup_gem: mutex_lock(&dev->struct_mutex); i915_gem_cleanup_ringbuffer(dev); i915_gem_context_fini(dev); mutex_unlock(&dev->struct_mutex); cleanup_irq: drm_irq_uninstall(dev); cleanup_gem_stolen: i915_gem_cleanup_stolen(dev); cleanup_vga_switcheroo: vga_switcheroo_unregister_client(dev->pdev); cleanup_vga_client: vga_client_register(dev->pdev, NULL, NULL, NULL); out: return ret; } #if IS_ENABLED(CONFIG_FB) static int i915_kick_out_firmware_fb(struct drm_i915_private *dev_priv) { struct apertures_struct *ap; struct pci_dev *pdev = dev_priv->dev->pdev; bool primary; int ret; ap = alloc_apertures(1); if (!ap) return -ENOMEM; ap->ranges[0].base = dev_priv->gtt.mappable_base; ap->ranges[0].size = dev_priv->gtt.mappable_end; primary = pdev->resource[PCI_ROM_RESOURCE].flags & IORESOURCE_ROM_SHADOW; ret = remove_conflicting_framebuffers(ap, "inteldrmfb", primary); kfree(ap); return ret; } #else static int i915_kick_out_firmware_fb(struct drm_i915_private *dev_priv) { return 0; } #endif #if !defined(CONFIG_VGA_CONSOLE) static int i915_kick_out_vgacon(struct drm_i915_private *dev_priv) { return 0; } #elif !defined(CONFIG_DUMMY_CONSOLE) static int i915_kick_out_vgacon(struct drm_i915_private *dev_priv) { return -ENODEV; } #else static int i915_kick_out_vgacon(struct drm_i915_private *dev_priv) { int ret = 0; DRM_INFO("Replacing VGA console driver\n"); console_lock(); if (con_is_bound(&vga_con)) ret = do_take_over_console(&dummy_con, 0, MAX_NR_CONSOLES - 1, 1); if (ret == 0) { ret = do_unregister_con_driver(&vga_con); /* Ignore "already unregistered". */ if (ret == -ENODEV) ret = 0; } console_unlock(); return ret; } #endif static void i915_dump_device_info(struct drm_i915_private *dev_priv) { const struct intel_device_info *info = &dev_priv->info; #define PRINT_S(name) "%s" #define SEP_EMPTY #define PRINT_FLAG(name) info->name ? #name "," : "" #define SEP_COMMA , DRM_DEBUG_DRIVER("i915 device info: gen=%i, pciid=0x%04x rev=0x%02x flags=" DEV_INFO_FOR_EACH_FLAG(PRINT_S, SEP_EMPTY), info->gen, dev_priv->dev->pdev->device, dev_priv->dev->pdev->revision, DEV_INFO_FOR_EACH_FLAG(PRINT_FLAG, SEP_COMMA)); #undef PRINT_S #undef SEP_EMPTY #undef PRINT_FLAG #undef SEP_COMMA } static void cherryview_sseu_info_init(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; struct intel_device_info *info; u32 fuse, eu_dis; info = (struct intel_device_info *)&dev_priv->info; fuse = I915_READ(CHV_FUSE_GT); info->slice_total = 1; if (!(fuse & CHV_FGT_DISABLE_SS0)) { info->subslice_per_slice++; eu_dis = fuse & (CHV_FGT_EU_DIS_SS0_R0_MASK | CHV_FGT_EU_DIS_SS0_R1_MASK); info->eu_total += 8 - hweight32(eu_dis); } if (!(fuse & CHV_FGT_DISABLE_SS1)) { info->subslice_per_slice++; eu_dis = fuse & (CHV_FGT_EU_DIS_SS1_R0_MASK | CHV_FGT_EU_DIS_SS1_R1_MASK); info->eu_total += 8 - hweight32(eu_dis); } info->subslice_total = info->subslice_per_slice; /* * CHV expected to always have a uniform distribution of EU * across subslices. */ info->eu_per_subslice = info->subslice_total ? info->eu_total / info->subslice_total : 0; /* * CHV supports subslice power gating on devices with more than * one subslice, and supports EU power gating on devices with * more than one EU pair per subslice. */ info->has_slice_pg = 0; info->has_subslice_pg = (info->subslice_total > 1); info->has_eu_pg = (info->eu_per_subslice > 2); } static void gen9_sseu_info_init(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; struct intel_device_info *info; int s_max = 3, ss_max = 4, eu_max = 8; int s, ss; u32 fuse2, s_enable, ss_disable, eu_disable; u8 eu_mask = 0xff; /* * BXT has a single slice. BXT also has at most 6 EU per subslice, * and therefore only the lowest 6 bits of the 8-bit EU disable * fields are valid. */ if (IS_BROXTON(dev)) { s_max = 1; eu_max = 6; eu_mask = 0x3f; } info = (struct intel_device_info *)&dev_priv->info; fuse2 = I915_READ(GEN8_FUSE2); s_enable = (fuse2 & GEN8_F2_S_ENA_MASK) >> GEN8_F2_S_ENA_SHIFT; ss_disable = (fuse2 & GEN9_F2_SS_DIS_MASK) >> GEN9_F2_SS_DIS_SHIFT; info->slice_total = hweight32(s_enable); /* * The subslice disable field is global, i.e. it applies * to each of the enabled slices. */ info->subslice_per_slice = ss_max - hweight32(ss_disable); info->subslice_total = info->slice_total * info->subslice_per_slice; /* * Iterate through enabled slices and subslices to * count the total enabled EU. */ for (s = 0; s < s_max; s++) { if (!(s_enable & (0x1 << s))) /* skip disabled slice */ continue; eu_disable = I915_READ(GEN9_EU_DISABLE(s)); for (ss = 0; ss < ss_max; ss++) { int eu_per_ss; if (ss_disable & (0x1 << ss)) /* skip disabled subslice */ continue; eu_per_ss = eu_max - hweight8((eu_disable >> (ss*8)) & eu_mask); /* * Record which subslice(s) has(have) 7 EUs. we * can tune the hash used to spread work among * subslices if they are unbalanced. */ if (eu_per_ss == 7) info->subslice_7eu[s] |= 1 << ss; info->eu_total += eu_per_ss; } } /* * SKL is expected to always have a uniform distribution * of EU across subslices with the exception that any one * EU in any one subslice may be fused off for die * recovery. BXT is expected to be perfectly uniform in EU * distribution. */ info->eu_per_subslice = info->subslice_total ? DIV_ROUND_UP(info->eu_total, info->subslice_total) : 0; /* * SKL supports slice power gating on devices with more than * one slice, and supports EU power gating on devices with * more than one EU pair per subslice. BXT supports subslice * power gating on devices with more than one subslice, and * supports EU power gating on devices with more than one EU * pair per subslice. */ info->has_slice_pg = (IS_SKYLAKE(dev) && (info->slice_total > 1)); info->has_subslice_pg = (IS_BROXTON(dev) && (info->subslice_total > 1)); info->has_eu_pg = (info->eu_per_subslice > 2); } /* * Determine various intel_device_info fields at runtime. * * Use it when either: * - it's judged too laborious to fill n static structures with the limit * when a simple if statement does the job, * - run-time checks (eg read fuse/strap registers) are needed. * * This function needs to be called: * - after the MMIO has been setup as we are reading registers, * - after the PCH has been detected, * - before the first usage of the fields it can tweak. */ static void intel_device_info_runtime_init(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; struct intel_device_info *info; enum pipe pipe; info = (struct intel_device_info *)&dev_priv->info; /* * Skylake and Broxton currently don't expose the topmost plane as its * use is exclusive with the legacy cursor and we only want to expose * one of those, not both. Until we can safely expose the topmost plane * as a DRM_PLANE_TYPE_CURSOR with all the features exposed/supported, * we don't expose the topmost plane at all to prevent ABI breakage * down the line. */ if (IS_BROXTON(dev)) { info->num_sprites[PIPE_A] = 2; info->num_sprites[PIPE_B] = 2; info->num_sprites[PIPE_C] = 1; } else if (IS_VALLEYVIEW(dev)) for_each_pipe(dev_priv, pipe) info->num_sprites[pipe] = 2; else for_each_pipe(dev_priv, pipe) info->num_sprites[pipe] = 1; if (i915.disable_display) { DRM_INFO("Display disabled (module parameter)\n"); info->num_pipes = 0; } else if (info->num_pipes > 0 && (INTEL_INFO(dev)->gen == 7 || INTEL_INFO(dev)->gen == 8) && !IS_VALLEYVIEW(dev)) { u32 fuse_strap = I915_READ(FUSE_STRAP); u32 sfuse_strap = I915_READ(SFUSE_STRAP); /* * SFUSE_STRAP is supposed to have a bit signalling the display * is fused off. Unfortunately it seems that, at least in * certain cases, fused off display means that PCH display * reads don't land anywhere. In that case, we read 0s. * * On CPT/PPT, we can detect this case as SFUSE_STRAP_FUSE_LOCK * should be set when taking over after the firmware. */ if (fuse_strap & ILK_INTERNAL_DISPLAY_DISABLE || sfuse_strap & SFUSE_STRAP_DISPLAY_DISABLED || (dev_priv->pch_type == PCH_CPT && !(sfuse_strap & SFUSE_STRAP_FUSE_LOCK))) { DRM_INFO("Display fused off, disabling\n"); info->num_pipes = 0; } } /* Initialize slice/subslice/EU info */ if (IS_CHERRYVIEW(dev)) cherryview_sseu_info_init(dev); else if (INTEL_INFO(dev)->gen >= 9) gen9_sseu_info_init(dev); DRM_DEBUG_DRIVER("slice total: %u\n", info->slice_total); DRM_DEBUG_DRIVER("subslice total: %u\n", info->subslice_total); DRM_DEBUG_DRIVER("subslice per slice: %u\n", info->subslice_per_slice); DRM_DEBUG_DRIVER("EU total: %u\n", info->eu_total); DRM_DEBUG_DRIVER("EU per subslice: %u\n", info->eu_per_subslice); DRM_DEBUG_DRIVER("has slice power gating: %s\n", info->has_slice_pg ? "y" : "n"); DRM_DEBUG_DRIVER("has subslice power gating: %s\n", info->has_subslice_pg ? "y" : "n"); DRM_DEBUG_DRIVER("has EU power gating: %s\n", info->has_eu_pg ? "y" : "n"); } /** * i915_driver_load - setup chip and create an initial config * @dev: DRM device * @flags: startup flags * * The driver load routine has to do several things: * - drive output discovery via intel_modeset_init() * - initialize the memory manager * - allocate initial config memory * - setup the DRM framebuffer with the allocated memory */ int i915_driver_load(struct drm_device *dev, unsigned long flags) { struct drm_i915_private *dev_priv; struct intel_device_info *info, *device_info; int ret = 0, mmio_bar, mmio_size; uint32_t aperture_size; info = (struct intel_device_info *) flags; dev_priv = kzalloc(sizeof(*dev_priv), GFP_KERNEL); if (dev_priv == NULL) return -ENOMEM; dev->dev_private = dev_priv; dev_priv->dev = dev; /* Setup the write-once "constant" device info */ device_info = (struct intel_device_info *)&dev_priv->info; memcpy(device_info, info, sizeof(dev_priv->info)); device_info->device_id = dev->pdev->device; spin_lock_init(&dev_priv->irq_lock); spin_lock_init(&dev_priv->gpu_error.lock); mutex_init(&dev_priv->backlight_lock); spin_lock_init(&dev_priv->uncore.lock); spin_lock_init(&dev_priv->mm.object_stat_lock); spin_lock_init(&dev_priv->mmio_flip_lock); mutex_init(&dev_priv->sb_lock); mutex_init(&dev_priv->modeset_restore_lock); mutex_init(&dev_priv->csr_lock); intel_pm_setup(dev); intel_display_crc_init(dev); i915_dump_device_info(dev_priv); /* Not all pre-production machines fall into this category, only the * very first ones. Almost everything should work, except for maybe * suspend/resume. And we don't implement workarounds that affect only * pre-production machines. */ if (IS_HSW_EARLY_SDV(dev)) DRM_INFO("This is an early pre-production Haswell machine. " "It may not be fully functional.\n"); if (i915_get_bridge_dev(dev)) { ret = -EIO; goto free_priv; } mmio_bar = IS_GEN2(dev) ? 1 : 0; /* Before gen4, the registers and the GTT are behind different BARs. * However, from gen4 onwards, the registers and the GTT are shared * in the same BAR, so we want to restrict this ioremap from * clobbering the GTT which we want ioremap_wc instead. Fortunately, * the register BAR remains the same size for all the earlier * generations up to Ironlake. */ if (info->gen < 5) mmio_size = 512*1024; else mmio_size = 2*1024*1024; dev_priv->regs = pci_iomap(dev->pdev, mmio_bar, mmio_size); if (!dev_priv->regs) { DRM_ERROR("failed to map registers\n"); ret = -EIO; goto put_bridge; } /* This must be called before any calls to HAS_PCH_* */ intel_detect_pch(dev); intel_uncore_init(dev); /* Load CSR Firmware for SKL */ intel_csr_ucode_init(dev); ret = i915_gem_gtt_init(dev); if (ret) goto out_freecsr; /* WARNING: Apparently we must kick fbdev drivers before vgacon, * otherwise the vga fbdev driver falls over. */ ret = i915_kick_out_firmware_fb(dev_priv); if (ret) { DRM_ERROR("failed to remove conflicting framebuffer drivers\n"); goto out_gtt; } ret = i915_kick_out_vgacon(dev_priv); if (ret) { DRM_ERROR("failed to remove conflicting VGA console\n"); goto out_gtt; } pci_set_master(dev->pdev); /* overlay on gen2 is broken and can't address above 1G */ if (IS_GEN2(dev)) dma_set_coherent_mask(&dev->pdev->dev, DMA_BIT_MASK(30)); /* 965GM sometimes incorrectly writes to hardware status page (HWS) * using 32bit addressing, overwriting memory if HWS is located * above 4GB. * * The documentation also mentions an issue with undefined * behaviour if any general state is accessed within a page above 4GB, * which also needs to be handled carefully. */ if (IS_BROADWATER(dev) || IS_CRESTLINE(dev)) dma_set_coherent_mask(&dev->pdev->dev, DMA_BIT_MASK(32)); aperture_size = dev_priv->gtt.mappable_end; dev_priv->gtt.mappable = io_mapping_create_wc(dev_priv->gtt.mappable_base, aperture_size); if (dev_priv->gtt.mappable == NULL) { ret = -EIO; goto out_gtt; } dev_priv->gtt.mtrr = arch_phys_wc_add(dev_priv->gtt.mappable_base, aperture_size); /* The i915 workqueue is primarily used for batched retirement of * requests (and thus managing bo) once the task has been completed * by the GPU. i915_gem_retire_requests() is called directly when we * need high-priority retirement, such as waiting for an explicit * bo. * * It is also used for periodic low-priority events, such as * idle-timers and recording error state. * * All tasks on the workqueue are expected to acquire the dev mutex * so there is no point in running more than one instance of the * workqueue at any time. Use an ordered one. */ dev_priv->wq = alloc_ordered_workqueue("i915", 0); if (dev_priv->wq == NULL) { DRM_ERROR("Failed to create our workqueue.\n"); ret = -ENOMEM; goto out_mtrrfree; } dev_priv->hotplug.dp_wq = alloc_ordered_workqueue("i915-dp", 0); if (dev_priv->hotplug.dp_wq == NULL) { DRM_ERROR("Failed to create our dp workqueue.\n"); ret = -ENOMEM; goto out_freewq; } dev_priv->gpu_error.hangcheck_wq = alloc_ordered_workqueue("i915-hangcheck", 0); if (dev_priv->gpu_error.hangcheck_wq == NULL) { DRM_ERROR("Failed to create our hangcheck workqueue.\n"); ret = -ENOMEM; goto out_freedpwq; } intel_irq_init(dev_priv); intel_uncore_sanitize(dev); /* Try to make sure MCHBAR is enabled before poking at it */ intel_setup_mchbar(dev); intel_setup_gmbus(dev); intel_opregion_setup(dev); intel_setup_bios(dev); i915_gem_load(dev); /* On the 945G/GM, the chipset reports the MSI capability on the * integrated graphics even though the support isn't actually there * according to the published specs. It doesn't appear to function * correctly in testing on 945G. * This may be a side effect of MSI having been made available for PEG * and the registers being closely associated. * * According to chipset errata, on the 965GM, MSI interrupts may * be lost or delayed, but we use them anyways to avoid * stuck interrupts on some machines. */ if (!IS_I945G(dev) && !IS_I945GM(dev)) pci_enable_msi(dev->pdev); intel_device_info_runtime_init(dev); if (INTEL_INFO(dev)->num_pipes) { ret = drm_vblank_init(dev, INTEL_INFO(dev)->num_pipes); if (ret) goto out_gem_unload; } intel_power_domains_init(dev_priv); ret = i915_load_modeset_init(dev); if (ret < 0) { DRM_ERROR("failed to init modeset\n"); goto out_power_well; } /* * Notify a valid surface after modesetting, * when running inside a VM. */ if (intel_vgpu_active(dev)) I915_WRITE(vgtif_reg(display_ready), VGT_DRV_DISPLAY_READY); i915_setup_sysfs(dev); if (INTEL_INFO(dev)->num_pipes) { /* Must be done after probing outputs */ intel_opregion_init(dev); acpi_video_register(); } if (IS_GEN5(dev)) intel_gpu_ips_init(dev_priv); intel_runtime_pm_enable(dev_priv); i915_audio_component_init(dev_priv); return 0; out_power_well: intel_power_domains_fini(dev_priv); drm_vblank_cleanup(dev); out_gem_unload: WARN_ON(unregister_oom_notifier(&dev_priv->mm.oom_notifier)); unregister_shrinker(&dev_priv->mm.shrinker); if (dev->pdev->msi_enabled) pci_disable_msi(dev->pdev); intel_teardown_gmbus(dev); intel_teardown_mchbar(dev); pm_qos_remove_request(&dev_priv->pm_qos); destroy_workqueue(dev_priv->gpu_error.hangcheck_wq); out_freedpwq: destroy_workqueue(dev_priv->hotplug.dp_wq); out_freewq: destroy_workqueue(dev_priv->wq); out_mtrrfree: arch_phys_wc_del(dev_priv->gtt.mtrr); io_mapping_free(dev_priv->gtt.mappable); out_gtt: i915_global_gtt_cleanup(dev); out_freecsr: intel_csr_ucode_fini(dev); intel_uncore_fini(dev); pci_iounmap(dev->pdev, dev_priv->regs); put_bridge: pci_dev_put(dev_priv->bridge_dev); free_priv: if (dev_priv->requests) kmem_cache_destroy(dev_priv->requests); if (dev_priv->vmas) kmem_cache_destroy(dev_priv->vmas); if (dev_priv->objects) kmem_cache_destroy(dev_priv->objects); kfree(dev_priv); return ret; } int i915_driver_unload(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; int ret; i915_audio_component_cleanup(dev_priv); ret = i915_gem_suspend(dev); if (ret) { DRM_ERROR("failed to idle hardware: %d\n", ret); return ret; } intel_power_domains_fini(dev_priv); intel_gpu_ips_teardown(); i915_teardown_sysfs(dev); WARN_ON(unregister_oom_notifier(&dev_priv->mm.oom_notifier)); unregister_shrinker(&dev_priv->mm.shrinker); io_mapping_free(dev_priv->gtt.mappable); arch_phys_wc_del(dev_priv->gtt.mtrr); acpi_video_unregister(); intel_fbdev_fini(dev); drm_vblank_cleanup(dev); intel_modeset_cleanup(dev); /* * free the memory space allocated for the child device * config parsed from VBT */ if (dev_priv->vbt.child_dev && dev_priv->vbt.child_dev_num) { kfree(dev_priv->vbt.child_dev); dev_priv->vbt.child_dev = NULL; dev_priv->vbt.child_dev_num = 0; } vga_switcheroo_unregister_client(dev->pdev); vga_client_register(dev->pdev, NULL, NULL, NULL); /* Free error state after interrupts are fully disabled. */ cancel_delayed_work_sync(&dev_priv->gpu_error.hangcheck_work); i915_destroy_error_state(dev); if (dev->pdev->msi_enabled) pci_disable_msi(dev->pdev); intel_opregion_fini(dev); /* Flush any outstanding unpin_work. */ flush_workqueue(dev_priv->wq); mutex_lock(&dev->struct_mutex); i915_gem_cleanup_ringbuffer(dev); i915_gem_context_fini(dev); mutex_unlock(&dev->struct_mutex); intel_fbc_cleanup_cfb(dev_priv); i915_gem_cleanup_stolen(dev); intel_csr_ucode_fini(dev); intel_teardown_gmbus(dev); intel_teardown_mchbar(dev); destroy_workqueue(dev_priv->hotplug.dp_wq); destroy_workqueue(dev_priv->wq); destroy_workqueue(dev_priv->gpu_error.hangcheck_wq); pm_qos_remove_request(&dev_priv->pm_qos); i915_global_gtt_cleanup(dev); intel_uncore_fini(dev); if (dev_priv->regs != NULL) pci_iounmap(dev->pdev, dev_priv->regs); if (dev_priv->requests) kmem_cache_destroy(dev_priv->requests); if (dev_priv->vmas) kmem_cache_destroy(dev_priv->vmas); if (dev_priv->objects) kmem_cache_destroy(dev_priv->objects); pci_dev_put(dev_priv->bridge_dev); kfree(dev_priv); return 0; } int i915_driver_open(struct drm_device *dev, struct drm_file *file) { int ret; ret = i915_gem_open(dev, file); if (ret) return ret; return 0; } /** * i915_driver_lastclose - clean up after all DRM clients have exited * @dev: DRM device * * Take care of cleaning up after all DRM clients have exited. In the * mode setting case, we want to restore the kernel's initial mode (just * in case the last client left us in a bad state). * * Additionally, in the non-mode setting case, we'll tear down the GTT * and DMA structures, since the kernel won't be using them, and clea * up any GEM state. */ void i915_driver_lastclose(struct drm_device *dev) { intel_fbdev_restore_mode(dev); vga_switcheroo_process_delayed_switch(); } void i915_driver_preclose(struct drm_device *dev, struct drm_file *file) { mutex_lock(&dev->struct_mutex); i915_gem_context_close(dev, file); i915_gem_release(dev, file); mutex_unlock(&dev->struct_mutex); intel_modeset_preclose(dev, file); } void i915_driver_postclose(struct drm_device *dev, struct drm_file *file) { struct drm_i915_file_private *file_priv = file->driver_priv; if (file_priv && file_priv->bsd_ring) file_priv->bsd_ring = NULL; kfree(file_priv); } static int i915_gem_reject_pin_ioctl(struct drm_device *dev, void *data, struct drm_file *file) { return -ENODEV; } const struct drm_ioctl_desc i915_ioctls[] = { DRM_IOCTL_DEF_DRV(I915_INIT, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), DRM_IOCTL_DEF_DRV(I915_FLUSH, drm_noop, DRM_AUTH), DRM_IOCTL_DEF_DRV(I915_FLIP, drm_noop, DRM_AUTH), DRM_IOCTL_DEF_DRV(I915_BATCHBUFFER, drm_noop, DRM_AUTH), DRM_IOCTL_DEF_DRV(I915_IRQ_EMIT, drm_noop, DRM_AUTH), DRM_IOCTL_DEF_DRV(I915_IRQ_WAIT, drm_noop, DRM_AUTH), DRM_IOCTL_DEF_DRV(I915_GETPARAM, i915_getparam, DRM_AUTH|DRM_RENDER_ALLOW), DRM_IOCTL_DEF_DRV(I915_SETPARAM, i915_setparam, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), DRM_IOCTL_DEF_DRV(I915_ALLOC, drm_noop, DRM_AUTH), DRM_IOCTL_DEF_DRV(I915_FREE, drm_noop, DRM_AUTH), DRM_IOCTL_DEF_DRV(I915_INIT_HEAP, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), DRM_IOCTL_DEF_DRV(I915_CMDBUFFER, drm_noop, DRM_AUTH), DRM_IOCTL_DEF_DRV(I915_DESTROY_HEAP, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), DRM_IOCTL_DEF_DRV(I915_SET_VBLANK_PIPE, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), DRM_IOCTL_DEF_DRV(I915_GET_VBLANK_PIPE, drm_noop, DRM_AUTH), DRM_IOCTL_DEF_DRV(I915_VBLANK_SWAP, drm_noop, DRM_AUTH), DRM_IOCTL_DEF_DRV(I915_HWS_ADDR, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), DRM_IOCTL_DEF_DRV(I915_GEM_INIT, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY|DRM_UNLOCKED), DRM_IOCTL_DEF_DRV(I915_GEM_EXECBUFFER, i915_gem_execbuffer, DRM_AUTH|DRM_UNLOCKED), DRM_IOCTL_DEF_DRV(I915_GEM_EXECBUFFER2, i915_gem_execbuffer2, DRM_AUTH|DRM_UNLOCKED|DRM_RENDER_ALLOW), DRM_IOCTL_DEF_DRV(I915_GEM_PIN, i915_gem_reject_pin_ioctl, DRM_AUTH|DRM_ROOT_ONLY|DRM_UNLOCKED), DRM_IOCTL_DEF_DRV(I915_GEM_UNPIN, i915_gem_reject_pin_ioctl, DRM_AUTH|DRM_ROOT_ONLY|DRM_UNLOCKED), DRM_IOCTL_DEF_DRV(I915_GEM_BUSY, i915_gem_busy_ioctl, DRM_AUTH|DRM_UNLOCKED|DRM_RENDER_ALLOW), DRM_IOCTL_DEF_DRV(I915_GEM_SET_CACHING, i915_gem_set_caching_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW), DRM_IOCTL_DEF_DRV(I915_GEM_GET_CACHING, i915_gem_get_caching_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW), DRM_IOCTL_DEF_DRV(I915_GEM_THROTTLE, i915_gem_throttle_ioctl, DRM_AUTH|DRM_UNLOCKED|DRM_RENDER_ALLOW), DRM_IOCTL_DEF_DRV(I915_GEM_ENTERVT, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY|DRM_UNLOCKED), DRM_IOCTL_DEF_DRV(I915_GEM_LEAVEVT, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY|DRM_UNLOCKED), DRM_IOCTL_DEF_DRV(I915_GEM_CREATE, i915_gem_create_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW), DRM_IOCTL_DEF_DRV(I915_GEM_PREAD, i915_gem_pread_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW), DRM_IOCTL_DEF_DRV(I915_GEM_PWRITE, i915_gem_pwrite_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW), DRM_IOCTL_DEF_DRV(I915_GEM_MMAP, i915_gem_mmap_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW), DRM_IOCTL_DEF_DRV(I915_GEM_MMAP_GTT, i915_gem_mmap_gtt_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW), DRM_IOCTL_DEF_DRV(I915_GEM_SET_DOMAIN, i915_gem_set_domain_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW), DRM_IOCTL_DEF_DRV(I915_GEM_SW_FINISH, i915_gem_sw_finish_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW), DRM_IOCTL_DEF_DRV(I915_GEM_SET_TILING, i915_gem_set_tiling, DRM_UNLOCKED|DRM_RENDER_ALLOW), DRM_IOCTL_DEF_DRV(I915_GEM_GET_TILING, i915_gem_get_tiling, DRM_UNLOCKED|DRM_RENDER_ALLOW), DRM_IOCTL_DEF_DRV(I915_GEM_GET_APERTURE, i915_gem_get_aperture_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW), DRM_IOCTL_DEF_DRV(I915_GET_PIPE_FROM_CRTC_ID, intel_get_pipe_from_crtc_id, DRM_UNLOCKED), DRM_IOCTL_DEF_DRV(I915_GEM_MADVISE, i915_gem_madvise_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW), DRM_IOCTL_DEF_DRV(I915_OVERLAY_PUT_IMAGE, intel_overlay_put_image, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), DRM_IOCTL_DEF_DRV(I915_OVERLAY_ATTRS, intel_overlay_attrs, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), DRM_IOCTL_DEF_DRV(I915_SET_SPRITE_COLORKEY, intel_sprite_set_colorkey, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), DRM_IOCTL_DEF_DRV(I915_GET_SPRITE_COLORKEY, drm_noop, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), DRM_IOCTL_DEF_DRV(I915_GEM_WAIT, i915_gem_wait_ioctl, DRM_AUTH|DRM_UNLOCKED|DRM_RENDER_ALLOW), DRM_IOCTL_DEF_DRV(I915_GEM_CONTEXT_CREATE, i915_gem_context_create_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW), DRM_IOCTL_DEF_DRV(I915_GEM_CONTEXT_DESTROY, i915_gem_context_destroy_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW), DRM_IOCTL_DEF_DRV(I915_REG_READ, i915_reg_read_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW), DRM_IOCTL_DEF_DRV(I915_GET_RESET_STATS, i915_get_reset_stats_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW), DRM_IOCTL_DEF_DRV(I915_GEM_USERPTR, i915_gem_userptr_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW), DRM_IOCTL_DEF_DRV(I915_GEM_CONTEXT_GETPARAM, i915_gem_context_getparam_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW), DRM_IOCTL_DEF_DRV(I915_GEM_CONTEXT_SETPARAM, i915_gem_context_setparam_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW), }; int i915_max_ioctl = ARRAY_SIZE(i915_ioctls); /* * This is really ugly: Because old userspace abused the linux agp interface to * manage the gtt, we need to claim that all intel devices are agp. For * otherwise the drm core refuses to initialize the agp support code. */ int i915_driver_device_is_agp(struct drm_device *dev) { return 1; }