/* i915_drv.c -- i830,i845,i855,i865,i915 driver -*- 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. * */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "display/intel_acpi.h" #include "display/intel_audio.h" #include "display/intel_bw.h" #include "display/intel_cdclk.h" #include "display/intel_display_types.h" #include "display/intel_dp.h" #include "display/intel_fbdev.h" #include "display/intel_hotplug.h" #include "display/intel_overlay.h" #include "display/intel_pipe_crc.h" #include "display/intel_sprite.h" #include "display/intel_vga.h" #include "gem/i915_gem_context.h" #include "gem/i915_gem_ioctls.h" #include "gem/i915_gem_mman.h" #include "gt/intel_gt.h" #include "gt/intel_gt_pm.h" #include "gt/intel_rc6.h" #include "i915_debugfs.h" #include "i915_drv.h" #include "i915_irq.h" #include "i915_memcpy.h" #include "i915_perf.h" #include "i915_query.h" #include "i915_suspend.h" #include "i915_switcheroo.h" #include "i915_sysfs.h" #include "i915_trace.h" #include "i915_vgpu.h" #include "intel_csr.h" #include "intel_memory_region.h" #include "intel_pm.h" static struct drm_driver driver; struct vlv_s0ix_state { /* GAM */ u32 wr_watermark; u32 gfx_prio_ctrl; u32 arb_mode; u32 gfx_pend_tlb0; u32 gfx_pend_tlb1; u32 lra_limits[GEN7_LRA_LIMITS_REG_NUM]; u32 media_max_req_count; u32 gfx_max_req_count; u32 render_hwsp; u32 ecochk; u32 bsd_hwsp; u32 blt_hwsp; u32 tlb_rd_addr; /* MBC */ u32 g3dctl; u32 gsckgctl; u32 mbctl; /* GCP */ u32 ucgctl1; u32 ucgctl3; u32 rcgctl1; u32 rcgctl2; u32 rstctl; u32 misccpctl; /* GPM */ u32 gfxpause; u32 rpdeuhwtc; u32 rpdeuc; u32 ecobus; u32 pwrdwnupctl; u32 rp_down_timeout; u32 rp_deucsw; u32 rcubmabdtmr; u32 rcedata; u32 spare2gh; /* Display 1 CZ domain */ u32 gt_imr; u32 gt_ier; u32 pm_imr; u32 pm_ier; u32 gt_scratch[GEN7_GT_SCRATCH_REG_NUM]; /* GT SA CZ domain */ u32 tilectl; u32 gt_fifoctl; u32 gtlc_wake_ctrl; u32 gtlc_survive; u32 pmwgicz; /* Display 2 CZ domain */ u32 gu_ctl0; u32 gu_ctl1; u32 pcbr; u32 clock_gate_dis2; }; static int i915_get_bridge_dev(struct drm_i915_private *dev_priv) { int domain = pci_domain_nr(dev_priv->drm.pdev->bus); dev_priv->bridge_dev = pci_get_domain_bus_and_slot(domain, 0, PCI_DEVFN(0, 0)); if (!dev_priv->bridge_dev) { DRM_ERROR("bridge device not found\n"); return -1; } return 0; } /* Allocate space for the MCH regs if needed, return nonzero on error */ static int intel_alloc_mchbar_resource(struct drm_i915_private *dev_priv) { int reg = INTEL_GEN(dev_priv) >= 4 ? MCHBAR_I965 : MCHBAR_I915; u32 temp_lo, temp_hi = 0; u64 mchbar_addr; int ret; if (INTEL_GEN(dev_priv) >= 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_GEN(dev_priv) >= 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_i915_private *dev_priv) { int mchbar_reg = INTEL_GEN(dev_priv) >= 4 ? MCHBAR_I965 : MCHBAR_I915; u32 temp; bool enabled; if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) return; dev_priv->mchbar_need_disable = false; if (IS_I915G(dev_priv) || IS_I915GM(dev_priv)) { pci_read_config_dword(dev_priv->bridge_dev, DEVEN, &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_priv)) return; dev_priv->mchbar_need_disable = true; /* Space is allocated or reserved, so enable it. */ if (IS_I915G(dev_priv) || IS_I915GM(dev_priv)) { pci_write_config_dword(dev_priv->bridge_dev, DEVEN, 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_i915_private *dev_priv) { int mchbar_reg = INTEL_GEN(dev_priv) >= 4 ? MCHBAR_I965 : MCHBAR_I915; if (dev_priv->mchbar_need_disable) { if (IS_I915G(dev_priv) || IS_I915GM(dev_priv)) { u32 deven_val; pci_read_config_dword(dev_priv->bridge_dev, DEVEN, &deven_val); deven_val &= ~DEVEN_MCHBAR_EN; pci_write_config_dword(dev_priv->bridge_dev, DEVEN, deven_val); } else { u32 mchbar_val; pci_read_config_dword(dev_priv->bridge_dev, mchbar_reg, &mchbar_val); mchbar_val &= ~1; pci_write_config_dword(dev_priv->bridge_dev, mchbar_reg, mchbar_val); } } if (dev_priv->mch_res.start) release_resource(&dev_priv->mch_res); } static int i915_driver_modeset_probe(struct drm_i915_private *i915) { int ret; if (i915_inject_probe_failure(i915)) return -ENODEV; if (HAS_DISPLAY(i915) && INTEL_DISPLAY_ENABLED(i915)) { ret = drm_vblank_init(&i915->drm, INTEL_NUM_PIPES(i915)); if (ret) goto out; } intel_bios_init(i915); ret = intel_vga_register(i915); if (ret) goto out; intel_register_dsm_handler(); ret = i915_switcheroo_register(i915); if (ret) goto cleanup_vga_client; intel_power_domains_init_hw(i915, false); intel_csr_ucode_init(i915); ret = intel_irq_install(i915); if (ret) goto cleanup_csr; /* Important: The output setup functions called by modeset_init need * working irqs for e.g. gmbus and dp aux transfers. */ ret = intel_modeset_init(i915); if (ret) goto cleanup_irq; ret = i915_gem_init(i915); if (ret) goto cleanup_modeset; intel_overlay_setup(i915); if (!HAS_DISPLAY(i915) || !INTEL_DISPLAY_ENABLED(i915)) return 0; ret = intel_fbdev_init(&i915->drm); if (ret) goto cleanup_gem; /* Only enable hotplug handling once the fbdev is fully set up. */ intel_hpd_init(i915); intel_init_ipc(i915); return 0; cleanup_gem: i915_gem_suspend(i915); i915_gem_driver_remove(i915); i915_gem_driver_release(i915); cleanup_modeset: intel_modeset_driver_remove(i915); cleanup_irq: intel_irq_uninstall(i915); cleanup_csr: intel_csr_ucode_fini(i915); intel_power_domains_driver_remove(i915); i915_switcheroo_unregister(i915); cleanup_vga_client: intel_vga_unregister(i915); out: return ret; } static void i915_driver_modeset_remove(struct drm_i915_private *i915) { intel_modeset_driver_remove(i915); intel_irq_uninstall(i915); intel_bios_driver_remove(i915); i915_switcheroo_unregister(i915); intel_vga_unregister(i915); intel_csr_ucode_fini(i915); } static void intel_init_dpio(struct drm_i915_private *dev_priv) { /* * IOSF_PORT_DPIO is used for VLV x2 PHY (DP/HDMI B and C), * CHV x1 PHY (DP/HDMI D) * IOSF_PORT_DPIO_2 is used for CHV x2 PHY (DP/HDMI B and C) */ if (IS_CHERRYVIEW(dev_priv)) { DPIO_PHY_IOSF_PORT(DPIO_PHY0) = IOSF_PORT_DPIO_2; DPIO_PHY_IOSF_PORT(DPIO_PHY1) = IOSF_PORT_DPIO; } else if (IS_VALLEYVIEW(dev_priv)) { DPIO_PHY_IOSF_PORT(DPIO_PHY0) = IOSF_PORT_DPIO; } } static int i915_workqueues_init(struct drm_i915_private *dev_priv) { /* * 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_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) goto out_err; dev_priv->hotplug.dp_wq = alloc_ordered_workqueue("i915-dp", 0); if (dev_priv->hotplug.dp_wq == NULL) goto out_free_wq; return 0; out_free_wq: destroy_workqueue(dev_priv->wq); out_err: DRM_ERROR("Failed to allocate workqueues.\n"); return -ENOMEM; } static void i915_workqueues_cleanup(struct drm_i915_private *dev_priv) { destroy_workqueue(dev_priv->hotplug.dp_wq); destroy_workqueue(dev_priv->wq); } /* * We don't keep the workarounds for pre-production hardware, so we expect our * driver to fail on these machines in one way or another. A little warning on * dmesg may help both the user and the bug triagers. * * Our policy for removing pre-production workarounds is to keep the * current gen workarounds as a guide to the bring-up of the next gen * (workarounds have a habit of persisting!). Anything older than that * should be removed along with the complications they introduce. */ static void intel_detect_preproduction_hw(struct drm_i915_private *dev_priv) { bool pre = false; pre |= IS_HSW_EARLY_SDV(dev_priv); pre |= IS_SKL_REVID(dev_priv, 0, SKL_REVID_F0); pre |= IS_BXT_REVID(dev_priv, 0, BXT_REVID_B_LAST); pre |= IS_KBL_REVID(dev_priv, 0, KBL_REVID_A0); if (pre) { DRM_ERROR("This is a pre-production stepping. " "It may not be fully functional.\n"); add_taint(TAINT_MACHINE_CHECK, LOCKDEP_STILL_OK); } } static int vlv_alloc_s0ix_state(struct drm_i915_private *i915) { if (!IS_VALLEYVIEW(i915)) return 0; /* we write all the values in the struct, so no need to zero it out */ i915->vlv_s0ix_state = kmalloc(sizeof(*i915->vlv_s0ix_state), GFP_KERNEL); if (!i915->vlv_s0ix_state) return -ENOMEM; return 0; } static void vlv_free_s0ix_state(struct drm_i915_private *i915) { if (!i915->vlv_s0ix_state) return; kfree(i915->vlv_s0ix_state); i915->vlv_s0ix_state = NULL; } static void sanitize_gpu(struct drm_i915_private *i915) { if (!INTEL_INFO(i915)->gpu_reset_clobbers_display) __intel_gt_reset(&i915->gt, ALL_ENGINES); } /** * i915_driver_early_probe - setup state not requiring device access * @dev_priv: device private * * Initialize everything that is a "SW-only" state, that is state not * requiring accessing the device or exposing the driver via kernel internal * or userspace interfaces. Example steps belonging here: lock initialization, * system memory allocation, setting up device specific attributes and * function hooks not requiring accessing the device. */ static int i915_driver_early_probe(struct drm_i915_private *dev_priv) { int ret = 0; if (i915_inject_probe_failure(dev_priv)) return -ENODEV; intel_device_info_subplatform_init(dev_priv); intel_uncore_mmio_debug_init_early(&dev_priv->mmio_debug); intel_uncore_init_early(&dev_priv->uncore, dev_priv); spin_lock_init(&dev_priv->irq_lock); spin_lock_init(&dev_priv->gpu_error.lock); mutex_init(&dev_priv->backlight_lock); mutex_init(&dev_priv->sb_lock); pm_qos_add_request(&dev_priv->sb_qos, PM_QOS_CPU_DMA_LATENCY, PM_QOS_DEFAULT_VALUE); mutex_init(&dev_priv->av_mutex); mutex_init(&dev_priv->wm.wm_mutex); mutex_init(&dev_priv->pps_mutex); mutex_init(&dev_priv->hdcp_comp_mutex); i915_memcpy_init_early(dev_priv); intel_runtime_pm_init_early(&dev_priv->runtime_pm); ret = i915_workqueues_init(dev_priv); if (ret < 0) return ret; ret = vlv_alloc_s0ix_state(dev_priv); if (ret < 0) goto err_workqueues; intel_wopcm_init_early(&dev_priv->wopcm); intel_gt_init_early(&dev_priv->gt, dev_priv); i915_gem_init_early(dev_priv); /* This must be called before any calls to HAS_PCH_* */ intel_detect_pch(dev_priv); intel_pm_setup(dev_priv); intel_init_dpio(dev_priv); ret = intel_power_domains_init(dev_priv); if (ret < 0) goto err_gem; intel_irq_init(dev_priv); intel_init_display_hooks(dev_priv); intel_init_clock_gating_hooks(dev_priv); intel_init_audio_hooks(dev_priv); intel_display_crc_init(dev_priv); intel_detect_preproduction_hw(dev_priv); return 0; err_gem: i915_gem_cleanup_early(dev_priv); intel_gt_driver_late_release(&dev_priv->gt); vlv_free_s0ix_state(dev_priv); err_workqueues: i915_workqueues_cleanup(dev_priv); return ret; } /** * i915_driver_late_release - cleanup the setup done in * i915_driver_early_probe() * @dev_priv: device private */ static void i915_driver_late_release(struct drm_i915_private *dev_priv) { intel_irq_fini(dev_priv); intel_power_domains_cleanup(dev_priv); i915_gem_cleanup_early(dev_priv); intel_gt_driver_late_release(&dev_priv->gt); vlv_free_s0ix_state(dev_priv); i915_workqueues_cleanup(dev_priv); pm_qos_remove_request(&dev_priv->sb_qos); mutex_destroy(&dev_priv->sb_lock); } /** * i915_driver_mmio_probe - setup device MMIO * @dev_priv: device private * * Setup minimal device state necessary for MMIO accesses later in the * initialization sequence. The setup here should avoid any other device-wide * side effects or exposing the driver via kernel internal or user space * interfaces. */ static int i915_driver_mmio_probe(struct drm_i915_private *dev_priv) { int ret; if (i915_inject_probe_failure(dev_priv)) return -ENODEV; if (i915_get_bridge_dev(dev_priv)) return -EIO; ret = intel_uncore_init_mmio(&dev_priv->uncore); if (ret < 0) goto err_bridge; /* Try to make sure MCHBAR is enabled before poking at it */ intel_setup_mchbar(dev_priv); intel_device_info_init_mmio(dev_priv); intel_uncore_prune_mmio_domains(&dev_priv->uncore); intel_uc_init_mmio(&dev_priv->gt.uc); ret = intel_engines_init_mmio(&dev_priv->gt); if (ret) goto err_uncore; /* As early as possible, scrub existing GPU state before clobbering */ sanitize_gpu(dev_priv); return 0; err_uncore: intel_teardown_mchbar(dev_priv); intel_uncore_fini_mmio(&dev_priv->uncore); err_bridge: pci_dev_put(dev_priv->bridge_dev); return ret; } /** * i915_driver_mmio_release - cleanup the setup done in i915_driver_mmio_probe() * @dev_priv: device private */ static void i915_driver_mmio_release(struct drm_i915_private *dev_priv) { intel_teardown_mchbar(dev_priv); intel_uncore_fini_mmio(&dev_priv->uncore); pci_dev_put(dev_priv->bridge_dev); } static void intel_sanitize_options(struct drm_i915_private *dev_priv) { intel_gvt_sanitize_options(dev_priv); } #define DRAM_TYPE_STR(type) [INTEL_DRAM_ ## type] = #type static const char *intel_dram_type_str(enum intel_dram_type type) { static const char * const str[] = { DRAM_TYPE_STR(UNKNOWN), DRAM_TYPE_STR(DDR3), DRAM_TYPE_STR(DDR4), DRAM_TYPE_STR(LPDDR3), DRAM_TYPE_STR(LPDDR4), }; if (type >= ARRAY_SIZE(str)) type = INTEL_DRAM_UNKNOWN; return str[type]; } #undef DRAM_TYPE_STR static int intel_dimm_num_devices(const struct dram_dimm_info *dimm) { return dimm->ranks * 64 / (dimm->width ?: 1); } /* Returns total GB for the whole DIMM */ static int skl_get_dimm_size(u16 val) { return val & SKL_DRAM_SIZE_MASK; } static int skl_get_dimm_width(u16 val) { if (skl_get_dimm_size(val) == 0) return 0; switch (val & SKL_DRAM_WIDTH_MASK) { case SKL_DRAM_WIDTH_X8: case SKL_DRAM_WIDTH_X16: case SKL_DRAM_WIDTH_X32: val = (val & SKL_DRAM_WIDTH_MASK) >> SKL_DRAM_WIDTH_SHIFT; return 8 << val; default: MISSING_CASE(val); return 0; } } static int skl_get_dimm_ranks(u16 val) { if (skl_get_dimm_size(val) == 0) return 0; val = (val & SKL_DRAM_RANK_MASK) >> SKL_DRAM_RANK_SHIFT; return val + 1; } /* Returns total GB for the whole DIMM */ static int cnl_get_dimm_size(u16 val) { return (val & CNL_DRAM_SIZE_MASK) / 2; } static int cnl_get_dimm_width(u16 val) { if (cnl_get_dimm_size(val) == 0) return 0; switch (val & CNL_DRAM_WIDTH_MASK) { case CNL_DRAM_WIDTH_X8: case CNL_DRAM_WIDTH_X16: case CNL_DRAM_WIDTH_X32: val = (val & CNL_DRAM_WIDTH_MASK) >> CNL_DRAM_WIDTH_SHIFT; return 8 << val; default: MISSING_CASE(val); return 0; } } static int cnl_get_dimm_ranks(u16 val) { if (cnl_get_dimm_size(val) == 0) return 0; val = (val & CNL_DRAM_RANK_MASK) >> CNL_DRAM_RANK_SHIFT; return val + 1; } static bool skl_is_16gb_dimm(const struct dram_dimm_info *dimm) { /* Convert total GB to Gb per DRAM device */ return 8 * dimm->size / (intel_dimm_num_devices(dimm) ?: 1) == 16; } static void skl_dram_get_dimm_info(struct drm_i915_private *dev_priv, struct dram_dimm_info *dimm, int channel, char dimm_name, u16 val) { if (INTEL_GEN(dev_priv) >= 10) { dimm->size = cnl_get_dimm_size(val); dimm->width = cnl_get_dimm_width(val); dimm->ranks = cnl_get_dimm_ranks(val); } else { dimm->size = skl_get_dimm_size(val); dimm->width = skl_get_dimm_width(val); dimm->ranks = skl_get_dimm_ranks(val); } DRM_DEBUG_KMS("CH%u DIMM %c size: %u GB, width: X%u, ranks: %u, 16Gb DIMMs: %s\n", channel, dimm_name, dimm->size, dimm->width, dimm->ranks, yesno(skl_is_16gb_dimm(dimm))); } static int skl_dram_get_channel_info(struct drm_i915_private *dev_priv, struct dram_channel_info *ch, int channel, u32 val) { skl_dram_get_dimm_info(dev_priv, &ch->dimm_l, channel, 'L', val & 0xffff); skl_dram_get_dimm_info(dev_priv, &ch->dimm_s, channel, 'S', val >> 16); if (ch->dimm_l.size == 0 && ch->dimm_s.size == 0) { DRM_DEBUG_KMS("CH%u not populated\n", channel); return -EINVAL; } if (ch->dimm_l.ranks == 2 || ch->dimm_s.ranks == 2) ch->ranks = 2; else if (ch->dimm_l.ranks == 1 && ch->dimm_s.ranks == 1) ch->ranks = 2; else ch->ranks = 1; ch->is_16gb_dimm = skl_is_16gb_dimm(&ch->dimm_l) || skl_is_16gb_dimm(&ch->dimm_s); DRM_DEBUG_KMS("CH%u ranks: %u, 16Gb DIMMs: %s\n", channel, ch->ranks, yesno(ch->is_16gb_dimm)); return 0; } static bool intel_is_dram_symmetric(const struct dram_channel_info *ch0, const struct dram_channel_info *ch1) { return !memcmp(ch0, ch1, sizeof(*ch0)) && (ch0->dimm_s.size == 0 || !memcmp(&ch0->dimm_l, &ch0->dimm_s, sizeof(ch0->dimm_l))); } static int skl_dram_get_channels_info(struct drm_i915_private *dev_priv) { struct dram_info *dram_info = &dev_priv->dram_info; struct dram_channel_info ch0 = {}, ch1 = {}; u32 val; int ret; val = I915_READ(SKL_MAD_DIMM_CH0_0_0_0_MCHBAR_MCMAIN); ret = skl_dram_get_channel_info(dev_priv, &ch0, 0, val); if (ret == 0) dram_info->num_channels++; val = I915_READ(SKL_MAD_DIMM_CH1_0_0_0_MCHBAR_MCMAIN); ret = skl_dram_get_channel_info(dev_priv, &ch1, 1, val); if (ret == 0) dram_info->num_channels++; if (dram_info->num_channels == 0) { DRM_INFO("Number of memory channels is zero\n"); return -EINVAL; } /* * If any of the channel is single rank channel, worst case output * will be same as if single rank memory, so consider single rank * memory. */ if (ch0.ranks == 1 || ch1.ranks == 1) dram_info->ranks = 1; else dram_info->ranks = max(ch0.ranks, ch1.ranks); if (dram_info->ranks == 0) { DRM_INFO("couldn't get memory rank information\n"); return -EINVAL; } dram_info->is_16gb_dimm = ch0.is_16gb_dimm || ch1.is_16gb_dimm; dram_info->symmetric_memory = intel_is_dram_symmetric(&ch0, &ch1); DRM_DEBUG_KMS("Memory configuration is symmetric? %s\n", yesno(dram_info->symmetric_memory)); return 0; } static enum intel_dram_type skl_get_dram_type(struct drm_i915_private *dev_priv) { u32 val; val = I915_READ(SKL_MAD_INTER_CHANNEL_0_0_0_MCHBAR_MCMAIN); switch (val & SKL_DRAM_DDR_TYPE_MASK) { case SKL_DRAM_DDR_TYPE_DDR3: return INTEL_DRAM_DDR3; case SKL_DRAM_DDR_TYPE_DDR4: return INTEL_DRAM_DDR4; case SKL_DRAM_DDR_TYPE_LPDDR3: return INTEL_DRAM_LPDDR3; case SKL_DRAM_DDR_TYPE_LPDDR4: return INTEL_DRAM_LPDDR4; default: MISSING_CASE(val); return INTEL_DRAM_UNKNOWN; } } static int skl_get_dram_info(struct drm_i915_private *dev_priv) { struct dram_info *dram_info = &dev_priv->dram_info; u32 mem_freq_khz, val; int ret; dram_info->type = skl_get_dram_type(dev_priv); DRM_DEBUG_KMS("DRAM type: %s\n", intel_dram_type_str(dram_info->type)); ret = skl_dram_get_channels_info(dev_priv); if (ret) return ret; val = I915_READ(SKL_MC_BIOS_DATA_0_0_0_MCHBAR_PCU); mem_freq_khz = DIV_ROUND_UP((val & SKL_REQ_DATA_MASK) * SKL_MEMORY_FREQ_MULTIPLIER_HZ, 1000); dram_info->bandwidth_kbps = dram_info->num_channels * mem_freq_khz * 8; if (dram_info->bandwidth_kbps == 0) { DRM_INFO("Couldn't get system memory bandwidth\n"); return -EINVAL; } dram_info->valid = true; return 0; } /* Returns Gb per DRAM device */ static int bxt_get_dimm_size(u32 val) { switch (val & BXT_DRAM_SIZE_MASK) { case BXT_DRAM_SIZE_4GBIT: return 4; case BXT_DRAM_SIZE_6GBIT: return 6; case BXT_DRAM_SIZE_8GBIT: return 8; case BXT_DRAM_SIZE_12GBIT: return 12; case BXT_DRAM_SIZE_16GBIT: return 16; default: MISSING_CASE(val); return 0; } } static int bxt_get_dimm_width(u32 val) { if (!bxt_get_dimm_size(val)) return 0; val = (val & BXT_DRAM_WIDTH_MASK) >> BXT_DRAM_WIDTH_SHIFT; return 8 << val; } static int bxt_get_dimm_ranks(u32 val) { if (!bxt_get_dimm_size(val)) return 0; switch (val & BXT_DRAM_RANK_MASK) { case BXT_DRAM_RANK_SINGLE: return 1; case BXT_DRAM_RANK_DUAL: return 2; default: MISSING_CASE(val); return 0; } } static enum intel_dram_type bxt_get_dimm_type(u32 val) { if (!bxt_get_dimm_size(val)) return INTEL_DRAM_UNKNOWN; switch (val & BXT_DRAM_TYPE_MASK) { case BXT_DRAM_TYPE_DDR3: return INTEL_DRAM_DDR3; case BXT_DRAM_TYPE_LPDDR3: return INTEL_DRAM_LPDDR3; case BXT_DRAM_TYPE_DDR4: return INTEL_DRAM_DDR4; case BXT_DRAM_TYPE_LPDDR4: return INTEL_DRAM_LPDDR4; default: MISSING_CASE(val); return INTEL_DRAM_UNKNOWN; } } static void bxt_get_dimm_info(struct dram_dimm_info *dimm, u32 val) { dimm->width = bxt_get_dimm_width(val); dimm->ranks = bxt_get_dimm_ranks(val); /* * Size in register is Gb per DRAM device. Convert to total * GB to match the way we report this for non-LP platforms. */ dimm->size = bxt_get_dimm_size(val) * intel_dimm_num_devices(dimm) / 8; } static int bxt_get_dram_info(struct drm_i915_private *dev_priv) { struct dram_info *dram_info = &dev_priv->dram_info; u32 dram_channels; u32 mem_freq_khz, val; u8 num_active_channels; int i; val = I915_READ(BXT_P_CR_MC_BIOS_REQ_0_0_0); mem_freq_khz = DIV_ROUND_UP((val & BXT_REQ_DATA_MASK) * BXT_MEMORY_FREQ_MULTIPLIER_HZ, 1000); dram_channels = val & BXT_DRAM_CHANNEL_ACTIVE_MASK; num_active_channels = hweight32(dram_channels); /* Each active bit represents 4-byte channel */ dram_info->bandwidth_kbps = (mem_freq_khz * num_active_channels * 4); if (dram_info->bandwidth_kbps == 0) { DRM_INFO("Couldn't get system memory bandwidth\n"); return -EINVAL; } /* * Now read each DUNIT8/9/10/11 to check the rank of each dimms. */ for (i = BXT_D_CR_DRP0_DUNIT_START; i <= BXT_D_CR_DRP0_DUNIT_END; i++) { struct dram_dimm_info dimm; enum intel_dram_type type; val = I915_READ(BXT_D_CR_DRP0_DUNIT(i)); if (val == 0xFFFFFFFF) continue; dram_info->num_channels++; bxt_get_dimm_info(&dimm, val); type = bxt_get_dimm_type(val); drm_WARN_ON(&dev_priv->drm, type != INTEL_DRAM_UNKNOWN && dram_info->type != INTEL_DRAM_UNKNOWN && dram_info->type != type); DRM_DEBUG_KMS("CH%u DIMM size: %u GB, width: X%u, ranks: %u, type: %s\n", i - BXT_D_CR_DRP0_DUNIT_START, dimm.size, dimm.width, dimm.ranks, intel_dram_type_str(type)); /* * If any of the channel is single rank channel, * worst case output will be same as if single rank * memory, so consider single rank memory. */ if (dram_info->ranks == 0) dram_info->ranks = dimm.ranks; else if (dimm.ranks == 1) dram_info->ranks = 1; if (type != INTEL_DRAM_UNKNOWN) dram_info->type = type; } if (dram_info->type == INTEL_DRAM_UNKNOWN || dram_info->ranks == 0) { DRM_INFO("couldn't get memory information\n"); return -EINVAL; } dram_info->valid = true; return 0; } static void intel_get_dram_info(struct drm_i915_private *dev_priv) { struct dram_info *dram_info = &dev_priv->dram_info; int ret; /* * Assume 16Gb DIMMs are present until proven otherwise. * This is only used for the level 0 watermark latency * w/a which does not apply to bxt/glk. */ dram_info->is_16gb_dimm = !IS_GEN9_LP(dev_priv); if (INTEL_GEN(dev_priv) < 9 || !HAS_DISPLAY(dev_priv)) return; if (IS_GEN9_LP(dev_priv)) ret = bxt_get_dram_info(dev_priv); else ret = skl_get_dram_info(dev_priv); if (ret) return; DRM_DEBUG_KMS("DRAM bandwidth: %u kBps, channels: %u\n", dram_info->bandwidth_kbps, dram_info->num_channels); DRM_DEBUG_KMS("DRAM ranks: %u, 16Gb DIMMs: %s\n", dram_info->ranks, yesno(dram_info->is_16gb_dimm)); } static u32 gen9_edram_size_mb(struct drm_i915_private *dev_priv, u32 cap) { static const u8 ways[8] = { 4, 8, 12, 16, 16, 16, 16, 16 }; static const u8 sets[4] = { 1, 1, 2, 2 }; return EDRAM_NUM_BANKS(cap) * ways[EDRAM_WAYS_IDX(cap)] * sets[EDRAM_SETS_IDX(cap)]; } static void edram_detect(struct drm_i915_private *dev_priv) { u32 edram_cap = 0; if (!(IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv) || INTEL_GEN(dev_priv) >= 9)) return; edram_cap = __raw_uncore_read32(&dev_priv->uncore, HSW_EDRAM_CAP); /* NB: We can't write IDICR yet because we don't have gt funcs set up */ if (!(edram_cap & EDRAM_ENABLED)) return; /* * The needed capability bits for size calculation are not there with * pre gen9 so return 128MB always. */ if (INTEL_GEN(dev_priv) < 9) dev_priv->edram_size_mb = 128; else dev_priv->edram_size_mb = gen9_edram_size_mb(dev_priv, edram_cap); dev_info(dev_priv->drm.dev, "Found %uMB of eDRAM\n", dev_priv->edram_size_mb); } /** * i915_driver_hw_probe - setup state requiring device access * @dev_priv: device private * * Setup state that requires accessing the device, but doesn't require * exposing the driver via kernel internal or userspace interfaces. */ static int i915_driver_hw_probe(struct drm_i915_private *dev_priv) { struct pci_dev *pdev = dev_priv->drm.pdev; int ret; if (i915_inject_probe_failure(dev_priv)) return -ENODEV; intel_device_info_runtime_init(dev_priv); if (HAS_PPGTT(dev_priv)) { if (intel_vgpu_active(dev_priv) && !intel_vgpu_has_full_ppgtt(dev_priv)) { i915_report_error(dev_priv, "incompatible vGPU found, support for isolated ppGTT required\n"); return -ENXIO; } } if (HAS_EXECLISTS(dev_priv)) { /* * Older GVT emulation depends upon intercepting CSB mmio, * which we no longer use, preferring to use the HWSP cache * instead. */ if (intel_vgpu_active(dev_priv) && !intel_vgpu_has_hwsp_emulation(dev_priv)) { i915_report_error(dev_priv, "old vGPU host found, support for HWSP emulation required\n"); return -ENXIO; } } intel_sanitize_options(dev_priv); /* needs to be done before ggtt probe */ edram_detect(dev_priv); i915_perf_init(dev_priv); ret = i915_ggtt_probe_hw(dev_priv); if (ret) goto err_perf; ret = drm_fb_helper_remove_conflicting_pci_framebuffers(pdev, "inteldrmfb"); if (ret) goto err_ggtt; ret = i915_ggtt_init_hw(dev_priv); if (ret) goto err_ggtt; ret = intel_memory_regions_hw_probe(dev_priv); if (ret) goto err_ggtt; intel_gt_init_hw_early(&dev_priv->gt, &dev_priv->ggtt); ret = i915_ggtt_enable_hw(dev_priv); if (ret) { DRM_ERROR("failed to enable GGTT\n"); goto err_mem_regions; } pci_set_master(pdev); /* * We don't have a max segment size, so set it to the max so sg's * debugging layer doesn't complain */ dma_set_max_seg_size(&pdev->dev, UINT_MAX); /* overlay on gen2 is broken and can't address above 1G */ if (IS_GEN(dev_priv, 2)) { ret = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(30)); if (ret) { DRM_ERROR("failed to set DMA mask\n"); goto err_mem_regions; } } /* 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_I965G(dev_priv) || IS_I965GM(dev_priv)) { ret = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32)); if (ret) { DRM_ERROR("failed to set DMA mask\n"); goto err_mem_regions; } } pm_qos_add_request(&dev_priv->pm_qos, PM_QOS_CPU_DMA_LATENCY, PM_QOS_DEFAULT_VALUE); intel_gt_init_workarounds(dev_priv); /* 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, and was defeatured. MSI interrupts seem to * get lost on g4x as well, and interrupt delivery seems to stay * properly dead afterwards. So we'll just disable them for all * pre-gen5 chipsets. * * dp aux and gmbus irq on gen4 seems to be able to generate legacy * interrupts even when in MSI mode. This results in spurious * interrupt warnings if the legacy irq no. is shared with another * device. The kernel then disables that interrupt source and so * prevents the other device from working properly. */ if (INTEL_GEN(dev_priv) >= 5) { if (pci_enable_msi(pdev) < 0) DRM_DEBUG_DRIVER("can't enable MSI"); } ret = intel_gvt_init(dev_priv); if (ret) goto err_msi; intel_opregion_setup(dev_priv); /* * Fill the dram structure to get the system raw bandwidth and * dram info. This will be used for memory latency calculation. */ intel_get_dram_info(dev_priv); intel_bw_init_hw(dev_priv); return 0; err_msi: if (pdev->msi_enabled) pci_disable_msi(pdev); pm_qos_remove_request(&dev_priv->pm_qos); err_mem_regions: intel_memory_regions_driver_release(dev_priv); err_ggtt: i915_ggtt_driver_release(dev_priv); err_perf: i915_perf_fini(dev_priv); return ret; } /** * i915_driver_hw_remove - cleanup the setup done in i915_driver_hw_probe() * @dev_priv: device private */ static void i915_driver_hw_remove(struct drm_i915_private *dev_priv) { struct pci_dev *pdev = dev_priv->drm.pdev; i915_perf_fini(dev_priv); if (pdev->msi_enabled) pci_disable_msi(pdev); pm_qos_remove_request(&dev_priv->pm_qos); } /** * i915_driver_register - register the driver with the rest of the system * @dev_priv: device private * * Perform any steps necessary to make the driver available via kernel * internal or userspace interfaces. */ static void i915_driver_register(struct drm_i915_private *dev_priv) { struct drm_device *dev = &dev_priv->drm; i915_gem_driver_register(dev_priv); i915_pmu_register(dev_priv); /* * Notify a valid surface after modesetting, * when running inside a VM. */ if (intel_vgpu_active(dev_priv)) I915_WRITE(vgtif_reg(display_ready), VGT_DRV_DISPLAY_READY); /* Reveal our presence to userspace */ if (drm_dev_register(dev, 0) == 0) { i915_debugfs_register(dev_priv); i915_setup_sysfs(dev_priv); /* Depends on sysfs having been initialized */ i915_perf_register(dev_priv); } else DRM_ERROR("Failed to register driver for userspace access!\n"); if (HAS_DISPLAY(dev_priv) && INTEL_DISPLAY_ENABLED(dev_priv)) { /* Must be done after probing outputs */ intel_opregion_register(dev_priv); acpi_video_register(); } intel_gt_driver_register(&dev_priv->gt); intel_audio_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. We do it last so that the async config * cannot run before the connectors are registered. */ intel_fbdev_initial_config_async(dev); /* * We need to coordinate the hotplugs with the asynchronous fbdev * configuration, for which we use the fbdev->async_cookie. */ if (HAS_DISPLAY(dev_priv) && INTEL_DISPLAY_ENABLED(dev_priv)) drm_kms_helper_poll_init(dev); intel_power_domains_enable(dev_priv); intel_runtime_pm_enable(&dev_priv->runtime_pm); } /** * i915_driver_unregister - cleanup the registration done in i915_driver_regiser() * @dev_priv: device private */ static void i915_driver_unregister(struct drm_i915_private *dev_priv) { intel_runtime_pm_disable(&dev_priv->runtime_pm); intel_power_domains_disable(dev_priv); intel_fbdev_unregister(dev_priv); intel_audio_deinit(dev_priv); /* * After flushing the fbdev (incl. a late async config which will * have delayed queuing of a hotplug event), then flush the hotplug * events. */ drm_kms_helper_poll_fini(&dev_priv->drm); intel_gt_driver_unregister(&dev_priv->gt); acpi_video_unregister(); intel_opregion_unregister(dev_priv); i915_perf_unregister(dev_priv); i915_pmu_unregister(dev_priv); i915_teardown_sysfs(dev_priv); drm_dev_unplug(&dev_priv->drm); i915_gem_driver_unregister(dev_priv); } static void i915_welcome_messages(struct drm_i915_private *dev_priv) { if (drm_debug_enabled(DRM_UT_DRIVER)) { struct drm_printer p = drm_debug_printer("i915 device info:"); drm_printf(&p, "pciid=0x%04x rev=0x%02x platform=%s (subplatform=0x%x) gen=%i\n", INTEL_DEVID(dev_priv), INTEL_REVID(dev_priv), intel_platform_name(INTEL_INFO(dev_priv)->platform), intel_subplatform(RUNTIME_INFO(dev_priv), INTEL_INFO(dev_priv)->platform), INTEL_GEN(dev_priv)); intel_device_info_print_static(INTEL_INFO(dev_priv), &p); intel_device_info_print_runtime(RUNTIME_INFO(dev_priv), &p); } if (IS_ENABLED(CONFIG_DRM_I915_DEBUG)) DRM_INFO("DRM_I915_DEBUG enabled\n"); if (IS_ENABLED(CONFIG_DRM_I915_DEBUG_GEM)) DRM_INFO("DRM_I915_DEBUG_GEM enabled\n"); if (IS_ENABLED(CONFIG_DRM_I915_DEBUG_RUNTIME_PM)) DRM_INFO("DRM_I915_DEBUG_RUNTIME_PM enabled\n"); } static struct drm_i915_private * i915_driver_create(struct pci_dev *pdev, const struct pci_device_id *ent) { const struct intel_device_info *match_info = (struct intel_device_info *)ent->driver_data; struct intel_device_info *device_info; struct drm_i915_private *i915; int err; i915 = kzalloc(sizeof(*i915), GFP_KERNEL); if (!i915) return ERR_PTR(-ENOMEM); err = drm_dev_init(&i915->drm, &driver, &pdev->dev); if (err) { kfree(i915); return ERR_PTR(err); } i915->drm.dev_private = i915; i915->drm.pdev = pdev; pci_set_drvdata(pdev, i915); /* Setup the write-once "constant" device info */ device_info = mkwrite_device_info(i915); memcpy(device_info, match_info, sizeof(*device_info)); RUNTIME_INFO(i915)->device_id = pdev->device; BUG_ON(device_info->gen > BITS_PER_TYPE(device_info->gen_mask)); return i915; } static void i915_driver_destroy(struct drm_i915_private *i915) { struct pci_dev *pdev = i915->drm.pdev; drm_dev_fini(&i915->drm); kfree(i915); /* And make sure we never chase our dangling pointer from pci_dev */ pci_set_drvdata(pdev, NULL); } /** * i915_driver_probe - setup chip and create an initial config * @pdev: PCI device * @ent: matching PCI ID entry * * The driver probe 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_probe(struct pci_dev *pdev, const struct pci_device_id *ent) { const struct intel_device_info *match_info = (struct intel_device_info *)ent->driver_data; struct drm_i915_private *dev_priv; int ret; dev_priv = i915_driver_create(pdev, ent); if (IS_ERR(dev_priv)) return PTR_ERR(dev_priv); /* Disable nuclear pageflip by default on pre-ILK */ if (!i915_modparams.nuclear_pageflip && match_info->gen < 5) dev_priv->drm.driver_features &= ~DRIVER_ATOMIC; /* * Check if we support fake LMEM -- for now we only unleash this for * the live selftests(test-and-exit). */ #if IS_ENABLED(CONFIG_DRM_I915_SELFTEST) if (IS_ENABLED(CONFIG_DRM_I915_UNSTABLE_FAKE_LMEM)) { if (INTEL_GEN(dev_priv) >= 9 && i915_selftest.live < 0 && i915_modparams.fake_lmem_start) { mkwrite_device_info(dev_priv)->memory_regions = REGION_SMEM | REGION_LMEM | REGION_STOLEN; mkwrite_device_info(dev_priv)->is_dgfx = true; GEM_BUG_ON(!HAS_LMEM(dev_priv)); GEM_BUG_ON(!IS_DGFX(dev_priv)); } } #endif ret = pci_enable_device(pdev); if (ret) goto out_fini; ret = i915_driver_early_probe(dev_priv); if (ret < 0) goto out_pci_disable; disable_rpm_wakeref_asserts(&dev_priv->runtime_pm); i915_detect_vgpu(dev_priv); ret = i915_driver_mmio_probe(dev_priv); if (ret < 0) goto out_runtime_pm_put; ret = i915_driver_hw_probe(dev_priv); if (ret < 0) goto out_cleanup_mmio; ret = i915_driver_modeset_probe(dev_priv); if (ret < 0) goto out_cleanup_hw; i915_driver_register(dev_priv); enable_rpm_wakeref_asserts(&dev_priv->runtime_pm); i915_welcome_messages(dev_priv); return 0; out_cleanup_hw: i915_driver_hw_remove(dev_priv); intel_memory_regions_driver_release(dev_priv); i915_ggtt_driver_release(dev_priv); out_cleanup_mmio: i915_driver_mmio_release(dev_priv); out_runtime_pm_put: enable_rpm_wakeref_asserts(&dev_priv->runtime_pm); i915_driver_late_release(dev_priv); out_pci_disable: pci_disable_device(pdev); out_fini: i915_probe_error(dev_priv, "Device initialization failed (%d)\n", ret); i915_driver_destroy(dev_priv); return ret; } void i915_driver_remove(struct drm_i915_private *i915) { disable_rpm_wakeref_asserts(&i915->runtime_pm); i915_driver_unregister(i915); /* * After unregistering the device to prevent any new users, cancel * all in-flight requests so that we can quickly unbind the active * resources. */ intel_gt_set_wedged(&i915->gt); /* Flush any external code that still may be under the RCU lock */ synchronize_rcu(); i915_gem_suspend(i915); drm_atomic_helper_shutdown(&i915->drm); intel_gvt_driver_remove(i915); i915_driver_modeset_remove(i915); i915_reset_error_state(i915); i915_gem_driver_remove(i915); intel_power_domains_driver_remove(i915); i915_driver_hw_remove(i915); enable_rpm_wakeref_asserts(&i915->runtime_pm); } static void i915_driver_release(struct drm_device *dev) { struct drm_i915_private *dev_priv = to_i915(dev); struct intel_runtime_pm *rpm = &dev_priv->runtime_pm; disable_rpm_wakeref_asserts(rpm); i915_gem_driver_release(dev_priv); intel_memory_regions_driver_release(dev_priv); i915_ggtt_driver_release(dev_priv); i915_driver_mmio_release(dev_priv); enable_rpm_wakeref_asserts(rpm); intel_runtime_pm_driver_release(rpm); i915_driver_late_release(dev_priv); i915_driver_destroy(dev_priv); } static int i915_driver_open(struct drm_device *dev, struct drm_file *file) { struct drm_i915_private *i915 = to_i915(dev); int ret; ret = i915_gem_open(i915, 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. */ static void i915_driver_lastclose(struct drm_device *dev) { intel_fbdev_restore_mode(dev); vga_switcheroo_process_delayed_switch(); } static void i915_driver_postclose(struct drm_device *dev, struct drm_file *file) { struct drm_i915_file_private *file_priv = file->driver_priv; i915_gem_context_close(file); i915_gem_release(dev, file); kfree_rcu(file_priv, rcu); /* Catch up with all the deferred frees from "this" client */ i915_gem_flush_free_objects(to_i915(dev)); } static void intel_suspend_encoders(struct drm_i915_private *dev_priv) { struct drm_device *dev = &dev_priv->drm; struct intel_encoder *encoder; drm_modeset_lock_all(dev); for_each_intel_encoder(dev, encoder) if (encoder->suspend) encoder->suspend(encoder); drm_modeset_unlock_all(dev); } static int vlv_resume_prepare(struct drm_i915_private *dev_priv, bool rpm_resume); static int vlv_suspend_complete(struct drm_i915_private *dev_priv); static bool suspend_to_idle(struct drm_i915_private *dev_priv) { #if IS_ENABLED(CONFIG_ACPI_SLEEP) if (acpi_target_system_state() < ACPI_STATE_S3) return true; #endif return false; } static int i915_drm_prepare(struct drm_device *dev) { struct drm_i915_private *i915 = to_i915(dev); /* * NB intel_display_suspend() may issue new requests after we've * ostensibly marked the GPU as ready-to-sleep here. We need to * split out that work and pull it forward so that after point, * the GPU is not woken again. */ i915_gem_suspend(i915); return 0; } static int i915_drm_suspend(struct drm_device *dev) { struct drm_i915_private *dev_priv = to_i915(dev); struct pci_dev *pdev = dev_priv->drm.pdev; pci_power_t opregion_target_state; disable_rpm_wakeref_asserts(&dev_priv->runtime_pm); /* We do a lot of poking in a lot of registers, make sure they work * properly. */ intel_power_domains_disable(dev_priv); drm_kms_helper_poll_disable(dev); pci_save_state(pdev); intel_display_suspend(dev); intel_dp_mst_suspend(dev_priv); intel_runtime_pm_disable_interrupts(dev_priv); intel_hpd_cancel_work(dev_priv); intel_suspend_encoders(dev_priv); intel_suspend_hw(dev_priv); i915_ggtt_suspend(&dev_priv->ggtt); i915_save_state(dev_priv); opregion_target_state = suspend_to_idle(dev_priv) ? PCI_D1 : PCI_D3cold; intel_opregion_suspend(dev_priv, opregion_target_state); intel_fbdev_set_suspend(dev, FBINFO_STATE_SUSPENDED, true); dev_priv->suspend_count++; intel_csr_ucode_suspend(dev_priv); enable_rpm_wakeref_asserts(&dev_priv->runtime_pm); return 0; } static enum i915_drm_suspend_mode get_suspend_mode(struct drm_i915_private *dev_priv, bool hibernate) { if (hibernate) return I915_DRM_SUSPEND_HIBERNATE; if (suspend_to_idle(dev_priv)) return I915_DRM_SUSPEND_IDLE; return I915_DRM_SUSPEND_MEM; } static int i915_drm_suspend_late(struct drm_device *dev, bool hibernation) { struct drm_i915_private *dev_priv = to_i915(dev); struct pci_dev *pdev = dev_priv->drm.pdev; struct intel_runtime_pm *rpm = &dev_priv->runtime_pm; int ret = 0; disable_rpm_wakeref_asserts(rpm); i915_gem_suspend_late(dev_priv); intel_uncore_suspend(&dev_priv->uncore); intel_power_domains_suspend(dev_priv, get_suspend_mode(dev_priv, hibernation)); intel_display_power_suspend_late(dev_priv); if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) ret = vlv_suspend_complete(dev_priv); if (ret) { DRM_ERROR("Suspend complete failed: %d\n", ret); intel_power_domains_resume(dev_priv); goto out; } pci_disable_device(pdev); /* * During hibernation on some platforms the BIOS may try to access * the device even though it's already in D3 and hang the machine. So * leave the device in D0 on those platforms and hope the BIOS will * power down the device properly. The issue was seen on multiple old * GENs with different BIOS vendors, so having an explicit blacklist * is inpractical; apply the workaround on everything pre GEN6. The * platforms where the issue was seen: * Lenovo Thinkpad X301, X61s, X60, T60, X41 * Fujitsu FSC S7110 * Acer Aspire 1830T */ if (!(hibernation && INTEL_GEN(dev_priv) < 6)) pci_set_power_state(pdev, PCI_D3hot); out: enable_rpm_wakeref_asserts(rpm); if (!dev_priv->uncore.user_forcewake_count) intel_runtime_pm_driver_release(rpm); return ret; } int i915_suspend_switcheroo(struct drm_i915_private *i915, pm_message_t state) { int error; if (drm_WARN_ON_ONCE(&i915->drm, state.event != PM_EVENT_SUSPEND && state.event != PM_EVENT_FREEZE)) return -EINVAL; if (i915->drm.switch_power_state == DRM_SWITCH_POWER_OFF) return 0; error = i915_drm_suspend(&i915->drm); if (error) return error; return i915_drm_suspend_late(&i915->drm, false); } static int i915_drm_resume(struct drm_device *dev) { struct drm_i915_private *dev_priv = to_i915(dev); int ret; disable_rpm_wakeref_asserts(&dev_priv->runtime_pm); sanitize_gpu(dev_priv); ret = i915_ggtt_enable_hw(dev_priv); if (ret) DRM_ERROR("failed to re-enable GGTT\n"); i915_ggtt_resume(&dev_priv->ggtt); i915_gem_restore_fences(&dev_priv->ggtt); intel_csr_ucode_resume(dev_priv); i915_restore_state(dev_priv); intel_pps_unlock_regs_wa(dev_priv); intel_init_pch_refclk(dev_priv); /* * Interrupts have to be enabled before any batches are run. If not the * GPU will hang. i915_gem_init_hw() will initiate batches to * update/restore the context. * * drm_mode_config_reset() needs AUX interrupts. * * Modeset enabling in intel_modeset_init_hw() also needs working * interrupts. */ intel_runtime_pm_enable_interrupts(dev_priv); drm_mode_config_reset(dev); i915_gem_resume(dev_priv); intel_modeset_init_hw(dev_priv); intel_init_clock_gating(dev_priv); spin_lock_irq(&dev_priv->irq_lock); if (dev_priv->display.hpd_irq_setup) dev_priv->display.hpd_irq_setup(dev_priv); spin_unlock_irq(&dev_priv->irq_lock); intel_dp_mst_resume(dev_priv); intel_display_resume(dev); drm_kms_helper_poll_enable(dev); /* * ... but also need to make sure that hotplug processing * doesn't cause havoc. Like in the driver load code we don't * bother with the tiny race here where we might lose hotplug * notifications. * */ intel_hpd_init(dev_priv); intel_opregion_resume(dev_priv); intel_fbdev_set_suspend(dev, FBINFO_STATE_RUNNING, false); intel_power_domains_enable(dev_priv); enable_rpm_wakeref_asserts(&dev_priv->runtime_pm); return 0; } static int i915_drm_resume_early(struct drm_device *dev) { struct drm_i915_private *dev_priv = to_i915(dev); struct pci_dev *pdev = dev_priv->drm.pdev; int ret; /* * We have a resume ordering issue with the snd-hda driver also * requiring our device to be power up. Due to the lack of a * parent/child relationship we currently solve this with an early * resume hook. * * FIXME: This should be solved with a special hdmi sink device or * similar so that power domains can be employed. */ /* * Note that we need to set the power state explicitly, since we * powered off the device during freeze and the PCI core won't power * it back up for us during thaw. Powering off the device during * freeze is not a hard requirement though, and during the * suspend/resume phases the PCI core makes sure we get here with the * device powered on. So in case we change our freeze logic and keep * the device powered we can also remove the following set power state * call. */ ret = pci_set_power_state(pdev, PCI_D0); if (ret) { DRM_ERROR("failed to set PCI D0 power state (%d)\n", ret); return ret; } /* * Note that pci_enable_device() first enables any parent bridge * device and only then sets the power state for this device. The * bridge enabling is a nop though, since bridge devices are resumed * first. The order of enabling power and enabling the device is * imposed by the PCI core as described above, so here we preserve the * same order for the freeze/thaw phases. * * TODO: eventually we should remove pci_disable_device() / * pci_enable_enable_device() from suspend/resume. Due to how they * depend on the device enable refcount we can't anyway depend on them * disabling/enabling the device. */ if (pci_enable_device(pdev)) return -EIO; pci_set_master(pdev); disable_rpm_wakeref_asserts(&dev_priv->runtime_pm); if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) ret = vlv_resume_prepare(dev_priv, false); if (ret) DRM_ERROR("Resume prepare failed: %d, continuing anyway\n", ret); intel_uncore_resume_early(&dev_priv->uncore); intel_gt_check_and_clear_faults(&dev_priv->gt); intel_display_power_resume_early(dev_priv); intel_power_domains_resume(dev_priv); enable_rpm_wakeref_asserts(&dev_priv->runtime_pm); return ret; } int i915_resume_switcheroo(struct drm_i915_private *i915) { int ret; if (i915->drm.switch_power_state == DRM_SWITCH_POWER_OFF) return 0; ret = i915_drm_resume_early(&i915->drm); if (ret) return ret; return i915_drm_resume(&i915->drm); } static int i915_pm_prepare(struct device *kdev) { struct drm_i915_private *i915 = kdev_to_i915(kdev); if (!i915) { dev_err(kdev, "DRM not initialized, aborting suspend.\n"); return -ENODEV; } if (i915->drm.switch_power_state == DRM_SWITCH_POWER_OFF) return 0; return i915_drm_prepare(&i915->drm); } static int i915_pm_suspend(struct device *kdev) { struct drm_i915_private *i915 = kdev_to_i915(kdev); if (!i915) { dev_err(kdev, "DRM not initialized, aborting suspend.\n"); return -ENODEV; } if (i915->drm.switch_power_state == DRM_SWITCH_POWER_OFF) return 0; return i915_drm_suspend(&i915->drm); } static int i915_pm_suspend_late(struct device *kdev) { struct drm_i915_private *i915 = kdev_to_i915(kdev); /* * We have a suspend ordering issue with the snd-hda driver also * requiring our device to be power up. Due to the lack of a * parent/child relationship we currently solve this with an late * suspend hook. * * FIXME: This should be solved with a special hdmi sink device or * similar so that power domains can be employed. */ if (i915->drm.switch_power_state == DRM_SWITCH_POWER_OFF) return 0; return i915_drm_suspend_late(&i915->drm, false); } static int i915_pm_poweroff_late(struct device *kdev) { struct drm_i915_private *i915 = kdev_to_i915(kdev); if (i915->drm.switch_power_state == DRM_SWITCH_POWER_OFF) return 0; return i915_drm_suspend_late(&i915->drm, true); } static int i915_pm_resume_early(struct device *kdev) { struct drm_i915_private *i915 = kdev_to_i915(kdev); if (i915->drm.switch_power_state == DRM_SWITCH_POWER_OFF) return 0; return i915_drm_resume_early(&i915->drm); } static int i915_pm_resume(struct device *kdev) { struct drm_i915_private *i915 = kdev_to_i915(kdev); if (i915->drm.switch_power_state == DRM_SWITCH_POWER_OFF) return 0; return i915_drm_resume(&i915->drm); } /* freeze: before creating the hibernation_image */ static int i915_pm_freeze(struct device *kdev) { struct drm_i915_private *i915 = kdev_to_i915(kdev); int ret; if (i915->drm.switch_power_state != DRM_SWITCH_POWER_OFF) { ret = i915_drm_suspend(&i915->drm); if (ret) return ret; } ret = i915_gem_freeze(i915); if (ret) return ret; return 0; } static int i915_pm_freeze_late(struct device *kdev) { struct drm_i915_private *i915 = kdev_to_i915(kdev); int ret; if (i915->drm.switch_power_state != DRM_SWITCH_POWER_OFF) { ret = i915_drm_suspend_late(&i915->drm, true); if (ret) return ret; } ret = i915_gem_freeze_late(i915); if (ret) return ret; return 0; } /* thaw: called after creating the hibernation image, but before turning off. */ static int i915_pm_thaw_early(struct device *kdev) { return i915_pm_resume_early(kdev); } static int i915_pm_thaw(struct device *kdev) { return i915_pm_resume(kdev); } /* restore: called after loading the hibernation image. */ static int i915_pm_restore_early(struct device *kdev) { return i915_pm_resume_early(kdev); } static int i915_pm_restore(struct device *kdev) { return i915_pm_resume(kdev); } /* * Save all Gunit registers that may be lost after a D3 and a subsequent * S0i[R123] transition. The list of registers needing a save/restore is * defined in the VLV2_S0IXRegs document. This documents marks all Gunit * registers in the following way: * - Driver: saved/restored by the driver * - Punit : saved/restored by the Punit firmware * - No, w/o marking: no need to save/restore, since the register is R/O or * used internally by the HW in a way that doesn't depend * keeping the content across a suspend/resume. * - Debug : used for debugging * * We save/restore all registers marked with 'Driver', with the following * exceptions: * - Registers out of use, including also registers marked with 'Debug'. * These have no effect on the driver's operation, so we don't save/restore * them to reduce the overhead. * - Registers that are fully setup by an initialization function called from * the resume path. For example many clock gating and RPS/RC6 registers. * - Registers that provide the right functionality with their reset defaults. * * TODO: Except for registers that based on the above 3 criteria can be safely * ignored, we save/restore all others, practically treating the HW context as * a black-box for the driver. Further investigation is needed to reduce the * saved/restored registers even further, by following the same 3 criteria. */ static void vlv_save_gunit_s0ix_state(struct drm_i915_private *dev_priv) { struct vlv_s0ix_state *s = dev_priv->vlv_s0ix_state; int i; if (!s) return; /* GAM 0x4000-0x4770 */ s->wr_watermark = I915_READ(GEN7_WR_WATERMARK); s->gfx_prio_ctrl = I915_READ(GEN7_GFX_PRIO_CTRL); s->arb_mode = I915_READ(ARB_MODE); s->gfx_pend_tlb0 = I915_READ(GEN7_GFX_PEND_TLB0); s->gfx_pend_tlb1 = I915_READ(GEN7_GFX_PEND_TLB1); for (i = 0; i < ARRAY_SIZE(s->lra_limits); i++) s->lra_limits[i] = I915_READ(GEN7_LRA_LIMITS(i)); s->media_max_req_count = I915_READ(GEN7_MEDIA_MAX_REQ_COUNT); s->gfx_max_req_count = I915_READ(GEN7_GFX_MAX_REQ_COUNT); s->render_hwsp = I915_READ(RENDER_HWS_PGA_GEN7); s->ecochk = I915_READ(GAM_ECOCHK); s->bsd_hwsp = I915_READ(BSD_HWS_PGA_GEN7); s->blt_hwsp = I915_READ(BLT_HWS_PGA_GEN7); s->tlb_rd_addr = I915_READ(GEN7_TLB_RD_ADDR); /* MBC 0x9024-0x91D0, 0x8500 */ s->g3dctl = I915_READ(VLV_G3DCTL); s->gsckgctl = I915_READ(VLV_GSCKGCTL); s->mbctl = I915_READ(GEN6_MBCTL); /* GCP 0x9400-0x9424, 0x8100-0x810C */ s->ucgctl1 = I915_READ(GEN6_UCGCTL1); s->ucgctl3 = I915_READ(GEN6_UCGCTL3); s->rcgctl1 = I915_READ(GEN6_RCGCTL1); s->rcgctl2 = I915_READ(GEN6_RCGCTL2); s->rstctl = I915_READ(GEN6_RSTCTL); s->misccpctl = I915_READ(GEN7_MISCCPCTL); /* GPM 0xA000-0xAA84, 0x8000-0x80FC */ s->gfxpause = I915_READ(GEN6_GFXPAUSE); s->rpdeuhwtc = I915_READ(GEN6_RPDEUHWTC); s->rpdeuc = I915_READ(GEN6_RPDEUC); s->ecobus = I915_READ(ECOBUS); s->pwrdwnupctl = I915_READ(VLV_PWRDWNUPCTL); s->rp_down_timeout = I915_READ(GEN6_RP_DOWN_TIMEOUT); s->rp_deucsw = I915_READ(GEN6_RPDEUCSW); s->rcubmabdtmr = I915_READ(GEN6_RCUBMABDTMR); s->rcedata = I915_READ(VLV_RCEDATA); s->spare2gh = I915_READ(VLV_SPAREG2H); /* Display CZ domain, 0x4400C-0x4402C, 0x4F000-0x4F11F */ s->gt_imr = I915_READ(GTIMR); s->gt_ier = I915_READ(GTIER); s->pm_imr = I915_READ(GEN6_PMIMR); s->pm_ier = I915_READ(GEN6_PMIER); for (i = 0; i < ARRAY_SIZE(s->gt_scratch); i++) s->gt_scratch[i] = I915_READ(GEN7_GT_SCRATCH(i)); /* GT SA CZ domain, 0x100000-0x138124 */ s->tilectl = I915_READ(TILECTL); s->gt_fifoctl = I915_READ(GTFIFOCTL); s->gtlc_wake_ctrl = I915_READ(VLV_GTLC_WAKE_CTRL); s->gtlc_survive = I915_READ(VLV_GTLC_SURVIVABILITY_REG); s->pmwgicz = I915_READ(VLV_PMWGICZ); /* Gunit-Display CZ domain, 0x182028-0x1821CF */ s->gu_ctl0 = I915_READ(VLV_GU_CTL0); s->gu_ctl1 = I915_READ(VLV_GU_CTL1); s->pcbr = I915_READ(VLV_PCBR); s->clock_gate_dis2 = I915_READ(VLV_GUNIT_CLOCK_GATE2); /* * Not saving any of: * DFT, 0x9800-0x9EC0 * SARB, 0xB000-0xB1FC * GAC, 0x5208-0x524C, 0x14000-0x14C000 * PCI CFG */ } static void vlv_restore_gunit_s0ix_state(struct drm_i915_private *dev_priv) { struct vlv_s0ix_state *s = dev_priv->vlv_s0ix_state; u32 val; int i; if (!s) return; /* GAM 0x4000-0x4770 */ I915_WRITE(GEN7_WR_WATERMARK, s->wr_watermark); I915_WRITE(GEN7_GFX_PRIO_CTRL, s->gfx_prio_ctrl); I915_WRITE(ARB_MODE, s->arb_mode | (0xffff << 16)); I915_WRITE(GEN7_GFX_PEND_TLB0, s->gfx_pend_tlb0); I915_WRITE(GEN7_GFX_PEND_TLB1, s->gfx_pend_tlb1); for (i = 0; i < ARRAY_SIZE(s->lra_limits); i++) I915_WRITE(GEN7_LRA_LIMITS(i), s->lra_limits[i]); I915_WRITE(GEN7_MEDIA_MAX_REQ_COUNT, s->media_max_req_count); I915_WRITE(GEN7_GFX_MAX_REQ_COUNT, s->gfx_max_req_count); I915_WRITE(RENDER_HWS_PGA_GEN7, s->render_hwsp); I915_WRITE(GAM_ECOCHK, s->ecochk); I915_WRITE(BSD_HWS_PGA_GEN7, s->bsd_hwsp); I915_WRITE(BLT_HWS_PGA_GEN7, s->blt_hwsp); I915_WRITE(GEN7_TLB_RD_ADDR, s->tlb_rd_addr); /* MBC 0x9024-0x91D0, 0x8500 */ I915_WRITE(VLV_G3DCTL, s->g3dctl); I915_WRITE(VLV_GSCKGCTL, s->gsckgctl); I915_WRITE(GEN6_MBCTL, s->mbctl); /* GCP 0x9400-0x9424, 0x8100-0x810C */ I915_WRITE(GEN6_UCGCTL1, s->ucgctl1); I915_WRITE(GEN6_UCGCTL3, s->ucgctl3); I915_WRITE(GEN6_RCGCTL1, s->rcgctl1); I915_WRITE(GEN6_RCGCTL2, s->rcgctl2); I915_WRITE(GEN6_RSTCTL, s->rstctl); I915_WRITE(GEN7_MISCCPCTL, s->misccpctl); /* GPM 0xA000-0xAA84, 0x8000-0x80FC */ I915_WRITE(GEN6_GFXPAUSE, s->gfxpause); I915_WRITE(GEN6_RPDEUHWTC, s->rpdeuhwtc); I915_WRITE(GEN6_RPDEUC, s->rpdeuc); I915_WRITE(ECOBUS, s->ecobus); I915_WRITE(VLV_PWRDWNUPCTL, s->pwrdwnupctl); I915_WRITE(GEN6_RP_DOWN_TIMEOUT,s->rp_down_timeout); I915_WRITE(GEN6_RPDEUCSW, s->rp_deucsw); I915_WRITE(GEN6_RCUBMABDTMR, s->rcubmabdtmr); I915_WRITE(VLV_RCEDATA, s->rcedata); I915_WRITE(VLV_SPAREG2H, s->spare2gh); /* Display CZ domain, 0x4400C-0x4402C, 0x4F000-0x4F11F */ I915_WRITE(GTIMR, s->gt_imr); I915_WRITE(GTIER, s->gt_ier); I915_WRITE(GEN6_PMIMR, s->pm_imr); I915_WRITE(GEN6_PMIER, s->pm_ier); for (i = 0; i < ARRAY_SIZE(s->gt_scratch); i++) I915_WRITE(GEN7_GT_SCRATCH(i), s->gt_scratch[i]); /* GT SA CZ domain, 0x100000-0x138124 */ I915_WRITE(TILECTL, s->tilectl); I915_WRITE(GTFIFOCTL, s->gt_fifoctl); /* * Preserve the GT allow wake and GFX force clock bit, they are not * be restored, as they are used to control the s0ix suspend/resume * sequence by the caller. */ val = I915_READ(VLV_GTLC_WAKE_CTRL); val &= VLV_GTLC_ALLOWWAKEREQ; val |= s->gtlc_wake_ctrl & ~VLV_GTLC_ALLOWWAKEREQ; I915_WRITE(VLV_GTLC_WAKE_CTRL, val); val = I915_READ(VLV_GTLC_SURVIVABILITY_REG); val &= VLV_GFX_CLK_FORCE_ON_BIT; val |= s->gtlc_survive & ~VLV_GFX_CLK_FORCE_ON_BIT; I915_WRITE(VLV_GTLC_SURVIVABILITY_REG, val); I915_WRITE(VLV_PMWGICZ, s->pmwgicz); /* Gunit-Display CZ domain, 0x182028-0x1821CF */ I915_WRITE(VLV_GU_CTL0, s->gu_ctl0); I915_WRITE(VLV_GU_CTL1, s->gu_ctl1); I915_WRITE(VLV_PCBR, s->pcbr); I915_WRITE(VLV_GUNIT_CLOCK_GATE2, s->clock_gate_dis2); } static int vlv_wait_for_pw_status(struct drm_i915_private *i915, u32 mask, u32 val) { i915_reg_t reg = VLV_GTLC_PW_STATUS; u32 reg_value; int ret; /* The HW does not like us polling for PW_STATUS frequently, so * use the sleeping loop rather than risk the busy spin within * intel_wait_for_register(). * * Transitioning between RC6 states should be at most 2ms (see * valleyview_enable_rps) so use a 3ms timeout. */ ret = wait_for(((reg_value = intel_uncore_read_notrace(&i915->uncore, reg)) & mask) == val, 3); /* just trace the final value */ trace_i915_reg_rw(false, reg, reg_value, sizeof(reg_value), true); return ret; } int vlv_force_gfx_clock(struct drm_i915_private *dev_priv, bool force_on) { u32 val; int err; val = I915_READ(VLV_GTLC_SURVIVABILITY_REG); val &= ~VLV_GFX_CLK_FORCE_ON_BIT; if (force_on) val |= VLV_GFX_CLK_FORCE_ON_BIT; I915_WRITE(VLV_GTLC_SURVIVABILITY_REG, val); if (!force_on) return 0; err = intel_wait_for_register(&dev_priv->uncore, VLV_GTLC_SURVIVABILITY_REG, VLV_GFX_CLK_STATUS_BIT, VLV_GFX_CLK_STATUS_BIT, 20); if (err) DRM_ERROR("timeout waiting for GFX clock force-on (%08x)\n", I915_READ(VLV_GTLC_SURVIVABILITY_REG)); return err; } static int vlv_allow_gt_wake(struct drm_i915_private *dev_priv, bool allow) { u32 mask; u32 val; int err; val = I915_READ(VLV_GTLC_WAKE_CTRL); val &= ~VLV_GTLC_ALLOWWAKEREQ; if (allow) val |= VLV_GTLC_ALLOWWAKEREQ; I915_WRITE(VLV_GTLC_WAKE_CTRL, val); POSTING_READ(VLV_GTLC_WAKE_CTRL); mask = VLV_GTLC_ALLOWWAKEACK; val = allow ? mask : 0; err = vlv_wait_for_pw_status(dev_priv, mask, val); if (err) DRM_ERROR("timeout disabling GT waking\n"); return err; } static void vlv_wait_for_gt_wells(struct drm_i915_private *dev_priv, bool wait_for_on) { u32 mask; u32 val; mask = VLV_GTLC_PW_MEDIA_STATUS_MASK | VLV_GTLC_PW_RENDER_STATUS_MASK; val = wait_for_on ? mask : 0; /* * RC6 transitioning can be delayed up to 2 msec (see * valleyview_enable_rps), use 3 msec for safety. * * This can fail to turn off the rc6 if the GPU is stuck after a failed * reset and we are trying to force the machine to sleep. */ if (vlv_wait_for_pw_status(dev_priv, mask, val)) DRM_DEBUG_DRIVER("timeout waiting for GT wells to go %s\n", onoff(wait_for_on)); } static void vlv_check_no_gt_access(struct drm_i915_private *dev_priv) { if (!(I915_READ(VLV_GTLC_PW_STATUS) & VLV_GTLC_ALLOWWAKEERR)) return; DRM_DEBUG_DRIVER("GT register access while GT waking disabled\n"); I915_WRITE(VLV_GTLC_PW_STATUS, VLV_GTLC_ALLOWWAKEERR); } static int vlv_suspend_complete(struct drm_i915_private *dev_priv) { u32 mask; int err; /* * Bspec defines the following GT well on flags as debug only, so * don't treat them as hard failures. */ vlv_wait_for_gt_wells(dev_priv, false); mask = VLV_GTLC_RENDER_CTX_EXISTS | VLV_GTLC_MEDIA_CTX_EXISTS; drm_WARN_ON(&dev_priv->drm, (I915_READ(VLV_GTLC_WAKE_CTRL) & mask) != mask); vlv_check_no_gt_access(dev_priv); err = vlv_force_gfx_clock(dev_priv, true); if (err) goto err1; err = vlv_allow_gt_wake(dev_priv, false); if (err) goto err2; vlv_save_gunit_s0ix_state(dev_priv); err = vlv_force_gfx_clock(dev_priv, false); if (err) goto err2; return 0; err2: /* For safety always re-enable waking and disable gfx clock forcing */ vlv_allow_gt_wake(dev_priv, true); err1: vlv_force_gfx_clock(dev_priv, false); return err; } static int vlv_resume_prepare(struct drm_i915_private *dev_priv, bool rpm_resume) { int err; int ret; /* * If any of the steps fail just try to continue, that's the best we * can do at this point. Return the first error code (which will also * leave RPM permanently disabled). */ ret = vlv_force_gfx_clock(dev_priv, true); vlv_restore_gunit_s0ix_state(dev_priv); err = vlv_allow_gt_wake(dev_priv, true); if (!ret) ret = err; err = vlv_force_gfx_clock(dev_priv, false); if (!ret) ret = err; vlv_check_no_gt_access(dev_priv); if (rpm_resume) intel_init_clock_gating(dev_priv); return ret; } static int intel_runtime_suspend(struct device *kdev) { struct drm_i915_private *dev_priv = kdev_to_i915(kdev); struct intel_runtime_pm *rpm = &dev_priv->runtime_pm; int ret = 0; if (drm_WARN_ON_ONCE(&dev_priv->drm, !HAS_RUNTIME_PM(dev_priv))) return -ENODEV; DRM_DEBUG_KMS("Suspending device\n"); disable_rpm_wakeref_asserts(rpm); /* * We are safe here against re-faults, since the fault handler takes * an RPM reference. */ i915_gem_runtime_suspend(dev_priv); intel_gt_runtime_suspend(&dev_priv->gt); intel_runtime_pm_disable_interrupts(dev_priv); intel_uncore_suspend(&dev_priv->uncore); intel_display_power_suspend(dev_priv); if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) ret = vlv_suspend_complete(dev_priv); if (ret) { DRM_ERROR("Runtime suspend failed, disabling it (%d)\n", ret); intel_uncore_runtime_resume(&dev_priv->uncore); intel_runtime_pm_enable_interrupts(dev_priv); intel_gt_runtime_resume(&dev_priv->gt); i915_gem_restore_fences(&dev_priv->ggtt); enable_rpm_wakeref_asserts(rpm); return ret; } enable_rpm_wakeref_asserts(rpm); intel_runtime_pm_driver_release(rpm); if (intel_uncore_arm_unclaimed_mmio_detection(&dev_priv->uncore)) DRM_ERROR("Unclaimed access detected prior to suspending\n"); rpm->suspended = true; /* * FIXME: We really should find a document that references the arguments * used below! */ if (IS_BROADWELL(dev_priv)) { /* * On Broadwell, if we use PCI_D1 the PCH DDI ports will stop * being detected, and the call we do at intel_runtime_resume() * won't be able to restore them. Since PCI_D3hot matches the * actual specification and appears to be working, use it. */ intel_opregion_notify_adapter(dev_priv, PCI_D3hot); } else { /* * current versions of firmware which depend on this opregion * notification have repurposed the D1 definition to mean * "runtime suspended" vs. what you would normally expect (D3) * to distinguish it from notifications that might be sent via * the suspend path. */ intel_opregion_notify_adapter(dev_priv, PCI_D1); } assert_forcewakes_inactive(&dev_priv->uncore); if (!IS_VALLEYVIEW(dev_priv) && !IS_CHERRYVIEW(dev_priv)) intel_hpd_poll_init(dev_priv); DRM_DEBUG_KMS("Device suspended\n"); return 0; } static int intel_runtime_resume(struct device *kdev) { struct drm_i915_private *dev_priv = kdev_to_i915(kdev); struct intel_runtime_pm *rpm = &dev_priv->runtime_pm; int ret = 0; if (drm_WARN_ON_ONCE(&dev_priv->drm, !HAS_RUNTIME_PM(dev_priv))) return -ENODEV; DRM_DEBUG_KMS("Resuming device\n"); drm_WARN_ON_ONCE(&dev_priv->drm, atomic_read(&rpm->wakeref_count)); disable_rpm_wakeref_asserts(rpm); intel_opregion_notify_adapter(dev_priv, PCI_D0); rpm->suspended = false; if (intel_uncore_unclaimed_mmio(&dev_priv->uncore)) DRM_DEBUG_DRIVER("Unclaimed access during suspend, bios?\n"); intel_display_power_resume(dev_priv); if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) ret = vlv_resume_prepare(dev_priv, true); intel_uncore_runtime_resume(&dev_priv->uncore); intel_runtime_pm_enable_interrupts(dev_priv); /* * No point of rolling back things in case of an error, as the best * we can do is to hope that things will still work (and disable RPM). */ intel_gt_runtime_resume(&dev_priv->gt); i915_gem_restore_fences(&dev_priv->ggtt); /* * On VLV/CHV display interrupts are part of the display * power well, so hpd is reinitialized from there. For * everyone else do it here. */ if (!IS_VALLEYVIEW(dev_priv) && !IS_CHERRYVIEW(dev_priv)) intel_hpd_init(dev_priv); intel_enable_ipc(dev_priv); enable_rpm_wakeref_asserts(rpm); if (ret) DRM_ERROR("Runtime resume failed, disabling it (%d)\n", ret); else DRM_DEBUG_KMS("Device resumed\n"); return ret; } const struct dev_pm_ops i915_pm_ops = { /* * S0ix (via system suspend) and S3 event handlers [PMSG_SUSPEND, * PMSG_RESUME] */ .prepare = i915_pm_prepare, .suspend = i915_pm_suspend, .suspend_late = i915_pm_suspend_late, .resume_early = i915_pm_resume_early, .resume = i915_pm_resume, /* * S4 event handlers * @freeze, @freeze_late : called (1) before creating the * hibernation image [PMSG_FREEZE] and * (2) after rebooting, before restoring * the image [PMSG_QUIESCE] * @thaw, @thaw_early : called (1) after creating the hibernation * image, before writing it [PMSG_THAW] * and (2) after failing to create or * restore the image [PMSG_RECOVER] * @poweroff, @poweroff_late: called after writing the hibernation * image, before rebooting [PMSG_HIBERNATE] * @restore, @restore_early : called after rebooting and restoring the * hibernation image [PMSG_RESTORE] */ .freeze = i915_pm_freeze, .freeze_late = i915_pm_freeze_late, .thaw_early = i915_pm_thaw_early, .thaw = i915_pm_thaw, .poweroff = i915_pm_suspend, .poweroff_late = i915_pm_poweroff_late, .restore_early = i915_pm_restore_early, .restore = i915_pm_restore, /* S0ix (via runtime suspend) event handlers */ .runtime_suspend = intel_runtime_suspend, .runtime_resume = intel_runtime_resume, }; static const struct file_operations i915_driver_fops = { .owner = THIS_MODULE, .open = drm_open, .release = drm_release, .unlocked_ioctl = drm_ioctl, .mmap = i915_gem_mmap, .poll = drm_poll, .read = drm_read, .compat_ioctl = i915_compat_ioctl, .llseek = noop_llseek, }; static int i915_gem_reject_pin_ioctl(struct drm_device *dev, void *data, struct drm_file *file) { return -ENODEV; } static 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_ioctl, DRM_RENDER_ALLOW), DRM_IOCTL_DEF_DRV(I915_SETPARAM, drm_noop, 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_IOCTL_DEF_DRV(I915_GEM_EXECBUFFER, i915_gem_execbuffer_ioctl, DRM_AUTH), DRM_IOCTL_DEF_DRV(I915_GEM_EXECBUFFER2_WR, i915_gem_execbuffer2_ioctl, DRM_RENDER_ALLOW), DRM_IOCTL_DEF_DRV(I915_GEM_PIN, i915_gem_reject_pin_ioctl, DRM_AUTH|DRM_ROOT_ONLY), DRM_IOCTL_DEF_DRV(I915_GEM_UNPIN, i915_gem_reject_pin_ioctl, DRM_AUTH|DRM_ROOT_ONLY), DRM_IOCTL_DEF_DRV(I915_GEM_BUSY, i915_gem_busy_ioctl, DRM_RENDER_ALLOW), DRM_IOCTL_DEF_DRV(I915_GEM_SET_CACHING, i915_gem_set_caching_ioctl, DRM_RENDER_ALLOW), DRM_IOCTL_DEF_DRV(I915_GEM_GET_CACHING, i915_gem_get_caching_ioctl, DRM_RENDER_ALLOW), DRM_IOCTL_DEF_DRV(I915_GEM_THROTTLE, i915_gem_throttle_ioctl, DRM_RENDER_ALLOW), DRM_IOCTL_DEF_DRV(I915_GEM_ENTERVT, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), DRM_IOCTL_DEF_DRV(I915_GEM_LEAVEVT, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), DRM_IOCTL_DEF_DRV(I915_GEM_CREATE, i915_gem_create_ioctl, DRM_RENDER_ALLOW), DRM_IOCTL_DEF_DRV(I915_GEM_PREAD, i915_gem_pread_ioctl, DRM_RENDER_ALLOW), DRM_IOCTL_DEF_DRV(I915_GEM_PWRITE, i915_gem_pwrite_ioctl, DRM_RENDER_ALLOW), DRM_IOCTL_DEF_DRV(I915_GEM_MMAP, i915_gem_mmap_ioctl, DRM_RENDER_ALLOW), DRM_IOCTL_DEF_DRV(I915_GEM_MMAP_OFFSET, i915_gem_mmap_offset_ioctl, DRM_RENDER_ALLOW), DRM_IOCTL_DEF_DRV(I915_GEM_SET_DOMAIN, i915_gem_set_domain_ioctl, DRM_RENDER_ALLOW), DRM_IOCTL_DEF_DRV(I915_GEM_SW_FINISH, i915_gem_sw_finish_ioctl, DRM_RENDER_ALLOW), DRM_IOCTL_DEF_DRV(I915_GEM_SET_TILING, i915_gem_set_tiling_ioctl, DRM_RENDER_ALLOW), DRM_IOCTL_DEF_DRV(I915_GEM_GET_TILING, i915_gem_get_tiling_ioctl, DRM_RENDER_ALLOW), DRM_IOCTL_DEF_DRV(I915_GEM_GET_APERTURE, i915_gem_get_aperture_ioctl, DRM_RENDER_ALLOW), DRM_IOCTL_DEF_DRV(I915_GET_PIPE_FROM_CRTC_ID, intel_get_pipe_from_crtc_id_ioctl, 0), DRM_IOCTL_DEF_DRV(I915_GEM_MADVISE, i915_gem_madvise_ioctl, DRM_RENDER_ALLOW), DRM_IOCTL_DEF_DRV(I915_OVERLAY_PUT_IMAGE, intel_overlay_put_image_ioctl, DRM_MASTER), DRM_IOCTL_DEF_DRV(I915_OVERLAY_ATTRS, intel_overlay_attrs_ioctl, DRM_MASTER), DRM_IOCTL_DEF_DRV(I915_SET_SPRITE_COLORKEY, intel_sprite_set_colorkey_ioctl, DRM_MASTER), DRM_IOCTL_DEF_DRV(I915_GET_SPRITE_COLORKEY, drm_noop, DRM_MASTER), DRM_IOCTL_DEF_DRV(I915_GEM_WAIT, i915_gem_wait_ioctl, DRM_RENDER_ALLOW), DRM_IOCTL_DEF_DRV(I915_GEM_CONTEXT_CREATE_EXT, i915_gem_context_create_ioctl, DRM_RENDER_ALLOW), DRM_IOCTL_DEF_DRV(I915_GEM_CONTEXT_DESTROY, i915_gem_context_destroy_ioctl, DRM_RENDER_ALLOW), DRM_IOCTL_DEF_DRV(I915_REG_READ, i915_reg_read_ioctl, DRM_RENDER_ALLOW), DRM_IOCTL_DEF_DRV(I915_GET_RESET_STATS, i915_gem_context_reset_stats_ioctl, DRM_RENDER_ALLOW), DRM_IOCTL_DEF_DRV(I915_GEM_USERPTR, i915_gem_userptr_ioctl, DRM_RENDER_ALLOW), DRM_IOCTL_DEF_DRV(I915_GEM_CONTEXT_GETPARAM, i915_gem_context_getparam_ioctl, DRM_RENDER_ALLOW), DRM_IOCTL_DEF_DRV(I915_GEM_CONTEXT_SETPARAM, i915_gem_context_setparam_ioctl, DRM_RENDER_ALLOW), DRM_IOCTL_DEF_DRV(I915_PERF_OPEN, i915_perf_open_ioctl, DRM_RENDER_ALLOW), DRM_IOCTL_DEF_DRV(I915_PERF_ADD_CONFIG, i915_perf_add_config_ioctl, DRM_RENDER_ALLOW), DRM_IOCTL_DEF_DRV(I915_PERF_REMOVE_CONFIG, i915_perf_remove_config_ioctl, DRM_RENDER_ALLOW), DRM_IOCTL_DEF_DRV(I915_QUERY, i915_query_ioctl, DRM_RENDER_ALLOW), DRM_IOCTL_DEF_DRV(I915_GEM_VM_CREATE, i915_gem_vm_create_ioctl, DRM_RENDER_ALLOW), DRM_IOCTL_DEF_DRV(I915_GEM_VM_DESTROY, i915_gem_vm_destroy_ioctl, DRM_RENDER_ALLOW), }; static struct drm_driver driver = { /* Don't use MTRRs here; the Xserver or userspace app should * deal with them for Intel hardware. */ .driver_features = DRIVER_GEM | DRIVER_RENDER | DRIVER_MODESET | DRIVER_ATOMIC | DRIVER_SYNCOBJ, .release = i915_driver_release, .open = i915_driver_open, .lastclose = i915_driver_lastclose, .postclose = i915_driver_postclose, .gem_close_object = i915_gem_close_object, .gem_free_object_unlocked = i915_gem_free_object, .prime_handle_to_fd = drm_gem_prime_handle_to_fd, .prime_fd_to_handle = drm_gem_prime_fd_to_handle, .gem_prime_export = i915_gem_prime_export, .gem_prime_import = i915_gem_prime_import, .get_vblank_timestamp = drm_calc_vbltimestamp_from_scanoutpos, .get_scanout_position = i915_get_crtc_scanoutpos, .dumb_create = i915_gem_dumb_create, .dumb_map_offset = i915_gem_dumb_mmap_offset, .ioctls = i915_ioctls, .num_ioctls = ARRAY_SIZE(i915_ioctls), .fops = &i915_driver_fops, .name = DRIVER_NAME, .desc = DRIVER_DESC, .date = DRIVER_DATE, .major = DRIVER_MAJOR, .minor = DRIVER_MINOR, .patchlevel = DRIVER_PATCHLEVEL, };