| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Tomas Winkler | 1373 | 60.83% | 53 | 50.96% |
| Oren Weil | 474 | 21.00% | 6 | 5.77% |
| Alexander Usyskin | 356 | 15.77% | 34 | 32.69% |
| Rafael J. Wysocki | 13 | 0.58% | 4 | 3.85% |
| Chuhong Yuan | 11 | 0.49% | 1 | 0.96% |
| Tomeu Vizoso | 9 | 0.40% | 1 | 0.96% |
| Benjamin Lee | 8 | 0.35% | 1 | 0.96% |
| Christophe Jaillet | 5 | 0.22% | 1 | 0.96% |
| Paul Bolle | 3 | 0.13% | 1 | 0.96% |
| Andy Shevchenko | 3 | 0.13% | 1 | 0.96% |
| Geert Uytterhoeven | 2 | 0.09% | 1 | 0.96% |
| Total | 2257 | 104 |
// SPDX-License-Identifier: GPL-2.0 /* * Copyright (c) 2003-2022, Intel Corporation. All rights reserved. * Intel Management Engine Interface (Intel MEI) Linux driver */ #include <linux/module.h> #include <linux/kernel.h> #include <linux/device.h> #include <linux/errno.h> #include <linux/types.h> #include <linux/pci.h> #include <linux/dma-mapping.h> #include <linux/sched.h> #include <linux/interrupt.h> #include <linux/pm_domain.h> #include <linux/pm_runtime.h> #include <linux/mei.h> #include "mei_dev.h" #include "client.h" #include "hw-me-regs.h" #include "hw-me.h" /* mei_pci_tbl - PCI Device ID Table */ static const struct pci_device_id mei_me_pci_tbl[] = { {MEI_PCI_DEVICE(MEI_DEV_ID_82946GZ, MEI_ME_ICH_CFG)}, {MEI_PCI_DEVICE(MEI_DEV_ID_82G35, MEI_ME_ICH_CFG)}, {MEI_PCI_DEVICE(MEI_DEV_ID_82Q965, MEI_ME_ICH_CFG)}, {MEI_PCI_DEVICE(MEI_DEV_ID_82G965, MEI_ME_ICH_CFG)}, {MEI_PCI_DEVICE(MEI_DEV_ID_82GM965, MEI_ME_ICH_CFG)}, {MEI_PCI_DEVICE(MEI_DEV_ID_82GME965, MEI_ME_ICH_CFG)}, {MEI_PCI_DEVICE(MEI_DEV_ID_ICH9_82Q35, MEI_ME_ICH_CFG)}, {MEI_PCI_DEVICE(MEI_DEV_ID_ICH9_82G33, MEI_ME_ICH_CFG)}, {MEI_PCI_DEVICE(MEI_DEV_ID_ICH9_82Q33, MEI_ME_ICH_CFG)}, {MEI_PCI_DEVICE(MEI_DEV_ID_ICH9_82X38, MEI_ME_ICH_CFG)}, {MEI_PCI_DEVICE(MEI_DEV_ID_ICH9_3200, MEI_ME_ICH_CFG)}, {MEI_PCI_DEVICE(MEI_DEV_ID_ICH9_6, MEI_ME_ICH_CFG)}, {MEI_PCI_DEVICE(MEI_DEV_ID_ICH9_7, MEI_ME_ICH_CFG)}, {MEI_PCI_DEVICE(MEI_DEV_ID_ICH9_8, MEI_ME_ICH_CFG)}, {MEI_PCI_DEVICE(MEI_DEV_ID_ICH9_9, MEI_ME_ICH_CFG)}, {MEI_PCI_DEVICE(MEI_DEV_ID_ICH9_10, MEI_ME_ICH_CFG)}, {MEI_PCI_DEVICE(MEI_DEV_ID_ICH9M_1, MEI_ME_ICH_CFG)}, {MEI_PCI_DEVICE(MEI_DEV_ID_ICH9M_2, MEI_ME_ICH_CFG)}, {MEI_PCI_DEVICE(MEI_DEV_ID_ICH9M_3, MEI_ME_ICH_CFG)}, {MEI_PCI_DEVICE(MEI_DEV_ID_ICH9M_4, MEI_ME_ICH_CFG)}, {MEI_PCI_DEVICE(MEI_DEV_ID_ICH10_1, MEI_ME_ICH10_CFG)}, {MEI_PCI_DEVICE(MEI_DEV_ID_ICH10_2, MEI_ME_ICH10_CFG)}, {MEI_PCI_DEVICE(MEI_DEV_ID_ICH10_3, MEI_ME_ICH10_CFG)}, {MEI_PCI_DEVICE(MEI_DEV_ID_ICH10_4, MEI_ME_ICH10_CFG)}, {MEI_PCI_DEVICE(MEI_DEV_ID_IBXPK_1, MEI_ME_PCH6_CFG)}, {MEI_PCI_DEVICE(MEI_DEV_ID_IBXPK_2, MEI_ME_PCH6_CFG)}, {MEI_PCI_DEVICE(MEI_DEV_ID_CPT_1, MEI_ME_PCH_CPT_PBG_CFG)}, {MEI_PCI_DEVICE(MEI_DEV_ID_PBG_1, MEI_ME_PCH_CPT_PBG_CFG)}, {MEI_PCI_DEVICE(MEI_DEV_ID_PPT_1, MEI_ME_PCH7_CFG)}, {MEI_PCI_DEVICE(MEI_DEV_ID_PPT_2, MEI_ME_PCH7_CFG)}, {MEI_PCI_DEVICE(MEI_DEV_ID_PPT_3, MEI_ME_PCH7_CFG)}, {MEI_PCI_DEVICE(MEI_DEV_ID_LPT_H, MEI_ME_PCH8_SPS_4_CFG)}, {MEI_PCI_DEVICE(MEI_DEV_ID_LPT_W, MEI_ME_PCH8_SPS_4_CFG)}, {MEI_PCI_DEVICE(MEI_DEV_ID_LPT_LP, MEI_ME_PCH8_CFG)}, {MEI_PCI_DEVICE(MEI_DEV_ID_LPT_HR, MEI_ME_PCH8_SPS_4_CFG)}, {MEI_PCI_DEVICE(MEI_DEV_ID_WPT_LP, MEI_ME_PCH8_CFG)}, {MEI_PCI_DEVICE(MEI_DEV_ID_WPT_LP_2, MEI_ME_PCH8_CFG)}, {MEI_PCI_DEVICE(MEI_DEV_ID_SPT, MEI_ME_PCH8_CFG)}, {MEI_PCI_DEVICE(MEI_DEV_ID_SPT_2, MEI_ME_PCH8_CFG)}, {MEI_PCI_DEVICE(MEI_DEV_ID_SPT_3, MEI_ME_PCH8_ITOUCH_CFG)}, {MEI_PCI_DEVICE(MEI_DEV_ID_SPT_H, MEI_ME_PCH8_SPS_4_CFG)}, {MEI_PCI_DEVICE(MEI_DEV_ID_SPT_H_2, MEI_ME_PCH8_SPS_4_CFG)}, {MEI_PCI_DEVICE(MEI_DEV_ID_LBG, MEI_ME_PCH12_SPS_4_CFG)}, {MEI_PCI_DEVICE(MEI_DEV_ID_BXT_M, MEI_ME_PCH8_CFG)}, {MEI_PCI_DEVICE(MEI_DEV_ID_APL_I, MEI_ME_PCH8_CFG)}, {MEI_PCI_DEVICE(MEI_DEV_ID_DNV_IE, MEI_ME_PCH8_CFG)}, {MEI_PCI_DEVICE(MEI_DEV_ID_GLK, MEI_ME_PCH8_CFG)}, {MEI_PCI_DEVICE(MEI_DEV_ID_KBP, MEI_ME_PCH8_CFG)}, {MEI_PCI_DEVICE(MEI_DEV_ID_KBP_2, MEI_ME_PCH8_CFG)}, {MEI_PCI_DEVICE(MEI_DEV_ID_KBP_3, MEI_ME_PCH8_CFG)}, {MEI_PCI_DEVICE(MEI_DEV_ID_CNP_LP, MEI_ME_PCH12_CFG)}, {MEI_PCI_DEVICE(MEI_DEV_ID_CNP_LP_3, MEI_ME_PCH8_ITOUCH_CFG)}, {MEI_PCI_DEVICE(MEI_DEV_ID_CNP_H, MEI_ME_PCH12_SPS_CFG)}, {MEI_PCI_DEVICE(MEI_DEV_ID_CNP_H_3, MEI_ME_PCH12_SPS_ITOUCH_CFG)}, {MEI_PCI_DEVICE(MEI_DEV_ID_CMP_LP, MEI_ME_PCH12_CFG)}, {MEI_PCI_DEVICE(MEI_DEV_ID_CMP_LP_3, MEI_ME_PCH8_ITOUCH_CFG)}, {MEI_PCI_DEVICE(MEI_DEV_ID_CMP_V, MEI_ME_PCH12_CFG)}, {MEI_PCI_DEVICE(MEI_DEV_ID_CMP_H, MEI_ME_PCH12_CFG)}, {MEI_PCI_DEVICE(MEI_DEV_ID_CMP_H_3, MEI_ME_PCH8_ITOUCH_CFG)}, {MEI_PCI_DEVICE(MEI_DEV_ID_ICP_LP, MEI_ME_PCH12_CFG)}, {MEI_PCI_DEVICE(MEI_DEV_ID_ICP_N, MEI_ME_PCH12_CFG)}, {MEI_PCI_DEVICE(MEI_DEV_ID_TGP_LP, MEI_ME_PCH15_CFG)}, {MEI_PCI_DEVICE(MEI_DEV_ID_TGP_H, MEI_ME_PCH15_SPS_CFG)}, {MEI_PCI_DEVICE(MEI_DEV_ID_JSP_N, MEI_ME_PCH15_CFG)}, {MEI_PCI_DEVICE(MEI_DEV_ID_MCC, MEI_ME_PCH15_CFG)}, {MEI_PCI_DEVICE(MEI_DEV_ID_MCC_4, MEI_ME_PCH8_CFG)}, {MEI_PCI_DEVICE(MEI_DEV_ID_CDF, MEI_ME_PCH8_CFG)}, {MEI_PCI_DEVICE(MEI_DEV_ID_EBG, MEI_ME_PCH15_SPS_CFG)}, {MEI_PCI_DEVICE(MEI_DEV_ID_ADP_S, MEI_ME_PCH15_CFG)}, {MEI_PCI_DEVICE(MEI_DEV_ID_ADP_LP, MEI_ME_PCH15_CFG)}, {MEI_PCI_DEVICE(MEI_DEV_ID_ADP_P, MEI_ME_PCH15_CFG)}, {MEI_PCI_DEVICE(MEI_DEV_ID_ADP_N, MEI_ME_PCH15_CFG)}, {MEI_PCI_DEVICE(MEI_DEV_ID_RPL_S, MEI_ME_PCH15_CFG)}, {MEI_PCI_DEVICE(MEI_DEV_ID_MTL_M, MEI_ME_PCH15_CFG)}, /* required last entry */ {0, } }; MODULE_DEVICE_TABLE(pci, mei_me_pci_tbl); #ifdef CONFIG_PM static inline void mei_me_set_pm_domain(struct mei_device *dev); static inline void mei_me_unset_pm_domain(struct mei_device *dev); #else static inline void mei_me_set_pm_domain(struct mei_device *dev) {} static inline void mei_me_unset_pm_domain(struct mei_device *dev) {} #endif /* CONFIG_PM */ static int mei_me_read_fws(const struct mei_device *dev, int where, u32 *val) { struct pci_dev *pdev = to_pci_dev(dev->dev); return pci_read_config_dword(pdev, where, val); } /** * mei_me_quirk_probe - probe for devices that doesn't valid ME interface * * @pdev: PCI device structure * @cfg: per generation config * * Return: true if ME Interface is valid, false otherwise */ static bool mei_me_quirk_probe(struct pci_dev *pdev, const struct mei_cfg *cfg) { if (cfg->quirk_probe && cfg->quirk_probe(pdev)) { dev_info(&pdev->dev, "Device doesn't have valid ME Interface\n"); return false; } return true; } /** * mei_me_probe - Device Initialization Routine * * @pdev: PCI device structure * @ent: entry in kcs_pci_tbl * * Return: 0 on success, <0 on failure. */ static int mei_me_probe(struct pci_dev *pdev, const struct pci_device_id *ent) { const struct mei_cfg *cfg; struct mei_device *dev; struct mei_me_hw *hw; unsigned int irqflags; int err; cfg = mei_me_get_cfg(ent->driver_data); if (!cfg) return -ENODEV; if (!mei_me_quirk_probe(pdev, cfg)) return -ENODEV; /* enable pci dev */ err = pcim_enable_device(pdev); if (err) { dev_err(&pdev->dev, "failed to enable pci device.\n"); goto end; } /* set PCI host mastering */ pci_set_master(pdev); /* pci request regions and mapping IO device memory for mei driver */ err = pcim_iomap_regions(pdev, BIT(0), KBUILD_MODNAME); if (err) { dev_err(&pdev->dev, "failed to get pci regions.\n"); goto end; } err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64)); if (err) { dev_err(&pdev->dev, "No usable DMA configuration, aborting\n"); goto end; } /* allocates and initializes the mei dev structure */ dev = mei_me_dev_init(&pdev->dev, cfg, false); if (!dev) { err = -ENOMEM; goto end; } hw = to_me_hw(dev); hw->mem_addr = pcim_iomap_table(pdev)[0]; hw->read_fws = mei_me_read_fws; pci_enable_msi(pdev); hw->irq = pdev->irq; /* request and enable interrupt */ irqflags = pci_dev_msi_enabled(pdev) ? IRQF_ONESHOT : IRQF_SHARED; err = request_threaded_irq(pdev->irq, mei_me_irq_quick_handler, mei_me_irq_thread_handler, irqflags, KBUILD_MODNAME, dev); if (err) { dev_err(&pdev->dev, "request_threaded_irq failure. irq = %d\n", pdev->irq); goto end; } if (mei_start(dev)) { dev_err(&pdev->dev, "init hw failure.\n"); err = -ENODEV; goto release_irq; } pm_runtime_set_autosuspend_delay(&pdev->dev, MEI_ME_RPM_TIMEOUT); pm_runtime_use_autosuspend(&pdev->dev); err = mei_register(dev, &pdev->dev); if (err) goto stop; pci_set_drvdata(pdev, dev); /* * MEI requires to resume from runtime suspend mode * in order to perform link reset flow upon system suspend. */ dev_pm_set_driver_flags(&pdev->dev, DPM_FLAG_NO_DIRECT_COMPLETE); /* * ME maps runtime suspend/resume to D0i states, * hence we need to go around native PCI runtime service which * eventually brings the device into D3cold/hot state, * but the mei device cannot wake up from D3 unlike from D0i3. * To get around the PCI device native runtime pm, * ME uses runtime pm domain handlers which take precedence * over the driver's pm handlers. */ mei_me_set_pm_domain(dev); if (mei_pg_is_enabled(dev)) { pm_runtime_put_noidle(&pdev->dev); if (hw->d0i3_supported) pm_runtime_allow(&pdev->dev); } dev_dbg(&pdev->dev, "initialization successful.\n"); return 0; stop: mei_stop(dev); release_irq: mei_cancel_work(dev); mei_disable_interrupts(dev); free_irq(pdev->irq, dev); end: dev_err(&pdev->dev, "initialization failed.\n"); return err; } /** * mei_me_shutdown - Device Removal Routine * * @pdev: PCI device structure * * mei_me_shutdown is called from the reboot notifier * it's a simplified version of remove so we go down * faster. */ static void mei_me_shutdown(struct pci_dev *pdev) { struct mei_device *dev; dev = pci_get_drvdata(pdev); if (!dev) return; dev_dbg(&pdev->dev, "shutdown\n"); mei_stop(dev); mei_me_unset_pm_domain(dev); mei_disable_interrupts(dev); free_irq(pdev->irq, dev); } /** * mei_me_remove - Device Removal Routine * * @pdev: PCI device structure * * mei_me_remove is called by the PCI subsystem to alert the driver * that it should release a PCI device. */ static void mei_me_remove(struct pci_dev *pdev) { struct mei_device *dev; dev = pci_get_drvdata(pdev); if (!dev) return; if (mei_pg_is_enabled(dev)) pm_runtime_get_noresume(&pdev->dev); dev_dbg(&pdev->dev, "stop\n"); mei_stop(dev); mei_me_unset_pm_domain(dev); mei_disable_interrupts(dev); free_irq(pdev->irq, dev); mei_deregister(dev); } #ifdef CONFIG_PM_SLEEP static int mei_me_pci_prepare(struct device *device) { pm_runtime_resume(device); return 0; } static int mei_me_pci_suspend(struct device *device) { struct pci_dev *pdev = to_pci_dev(device); struct mei_device *dev = pci_get_drvdata(pdev); if (!dev) return -ENODEV; dev_dbg(&pdev->dev, "suspend\n"); mei_stop(dev); mei_disable_interrupts(dev); free_irq(pdev->irq, dev); pci_disable_msi(pdev); return 0; } static int mei_me_pci_resume(struct device *device) { struct pci_dev *pdev = to_pci_dev(device); struct mei_device *dev; unsigned int irqflags; int err; dev = pci_get_drvdata(pdev); if (!dev) return -ENODEV; pci_enable_msi(pdev); irqflags = pci_dev_msi_enabled(pdev) ? IRQF_ONESHOT : IRQF_SHARED; /* request and enable interrupt */ err = request_threaded_irq(pdev->irq, mei_me_irq_quick_handler, mei_me_irq_thread_handler, irqflags, KBUILD_MODNAME, dev); if (err) { dev_err(&pdev->dev, "request_threaded_irq failed: irq = %d.\n", pdev->irq); return err; } err = mei_restart(dev); if (err) return err; /* Start timer if stopped in suspend */ schedule_delayed_work(&dev->timer_work, HZ); return 0; } static void mei_me_pci_complete(struct device *device) { pm_runtime_suspend(device); } #else /* CONFIG_PM_SLEEP */ #define mei_me_pci_prepare NULL #define mei_me_pci_complete NULL #endif /* !CONFIG_PM_SLEEP */ #ifdef CONFIG_PM static int mei_me_pm_runtime_idle(struct device *device) { struct mei_device *dev; dev_dbg(device, "rpm: me: runtime_idle\n"); dev = dev_get_drvdata(device); if (!dev) return -ENODEV; if (mei_write_is_idle(dev)) pm_runtime_autosuspend(device); return -EBUSY; } static int mei_me_pm_runtime_suspend(struct device *device) { struct mei_device *dev; int ret; dev_dbg(device, "rpm: me: runtime suspend\n"); dev = dev_get_drvdata(device); if (!dev) return -ENODEV; mutex_lock(&dev->device_lock); if (mei_write_is_idle(dev)) ret = mei_me_pg_enter_sync(dev); else ret = -EAGAIN; mutex_unlock(&dev->device_lock); dev_dbg(device, "rpm: me: runtime suspend ret=%d\n", ret); if (ret && ret != -EAGAIN) schedule_work(&dev->reset_work); return ret; } static int mei_me_pm_runtime_resume(struct device *device) { struct mei_device *dev; int ret; dev_dbg(device, "rpm: me: runtime resume\n"); dev = dev_get_drvdata(device); if (!dev) return -ENODEV; mutex_lock(&dev->device_lock); ret = mei_me_pg_exit_sync(dev); mutex_unlock(&dev->device_lock); dev_dbg(device, "rpm: me: runtime resume ret = %d\n", ret); if (ret) schedule_work(&dev->reset_work); return ret; } /** * mei_me_set_pm_domain - fill and set pm domain structure for device * * @dev: mei_device */ static inline void mei_me_set_pm_domain(struct mei_device *dev) { struct pci_dev *pdev = to_pci_dev(dev->dev); if (pdev->dev.bus && pdev->dev.bus->pm) { dev->pg_domain.ops = *pdev->dev.bus->pm; dev->pg_domain.ops.runtime_suspend = mei_me_pm_runtime_suspend; dev->pg_domain.ops.runtime_resume = mei_me_pm_runtime_resume; dev->pg_domain.ops.runtime_idle = mei_me_pm_runtime_idle; dev_pm_domain_set(&pdev->dev, &dev->pg_domain); } } /** * mei_me_unset_pm_domain - clean pm domain structure for device * * @dev: mei_device */ static inline void mei_me_unset_pm_domain(struct mei_device *dev) { /* stop using pm callbacks if any */ dev_pm_domain_set(dev->dev, NULL); } static const struct dev_pm_ops mei_me_pm_ops = { .prepare = mei_me_pci_prepare, .complete = mei_me_pci_complete, SET_SYSTEM_SLEEP_PM_OPS(mei_me_pci_suspend, mei_me_pci_resume) SET_RUNTIME_PM_OPS( mei_me_pm_runtime_suspend, mei_me_pm_runtime_resume, mei_me_pm_runtime_idle) }; #define MEI_ME_PM_OPS (&mei_me_pm_ops) #else #define MEI_ME_PM_OPS NULL #endif /* CONFIG_PM */ /* * PCI driver structure */ static struct pci_driver mei_me_driver = { .name = KBUILD_MODNAME, .id_table = mei_me_pci_tbl, .probe = mei_me_probe, .remove = mei_me_remove, .shutdown = mei_me_shutdown, .driver.pm = MEI_ME_PM_OPS, .driver.probe_type = PROBE_PREFER_ASYNCHRONOUS, }; module_pci_driver(mei_me_driver); MODULE_AUTHOR("Intel Corporation"); MODULE_DESCRIPTION("Intel(R) Management Engine Interface"); MODULE_LICENSE("GPL v2");
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