12703d4b2STomas Winkler /* 22703d4b2STomas Winkler * 32703d4b2STomas Winkler * Intel Management Engine Interface (Intel MEI) Linux driver 42703d4b2STomas Winkler * Copyright (c) 2003-2012, Intel Corporation. 52703d4b2STomas Winkler * 62703d4b2STomas Winkler * This program is free software; you can redistribute it and/or modify it 72703d4b2STomas Winkler * under the terms and conditions of the GNU General Public License, 82703d4b2STomas Winkler * version 2, as published by the Free Software Foundation. 92703d4b2STomas Winkler * 102703d4b2STomas Winkler * This program is distributed in the hope it will be useful, but WITHOUT 112703d4b2STomas Winkler * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 122703d4b2STomas Winkler * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 132703d4b2STomas Winkler * more details. 142703d4b2STomas Winkler * 152703d4b2STomas Winkler */ 162703d4b2STomas Winkler #include <linux/module.h> 172703d4b2STomas Winkler #include <linux/moduleparam.h> 182703d4b2STomas Winkler #include <linux/kernel.h> 192703d4b2STomas Winkler #include <linux/device.h> 202703d4b2STomas Winkler #include <linux/fs.h> 212703d4b2STomas Winkler #include <linux/errno.h> 222703d4b2STomas Winkler #include <linux/types.h> 232703d4b2STomas Winkler #include <linux/fcntl.h> 242703d4b2STomas Winkler #include <linux/aio.h> 252703d4b2STomas Winkler #include <linux/pci.h> 262703d4b2STomas Winkler #include <linux/poll.h> 272703d4b2STomas Winkler #include <linux/ioctl.h> 282703d4b2STomas Winkler #include <linux/cdev.h> 292703d4b2STomas Winkler #include <linux/sched.h> 302703d4b2STomas Winkler #include <linux/uuid.h> 312703d4b2STomas Winkler #include <linux/compat.h> 322703d4b2STomas Winkler #include <linux/jiffies.h> 332703d4b2STomas Winkler #include <linux/interrupt.h> 342703d4b2STomas Winkler 35180ea05bSTomas Winkler #include <linux/pm_runtime.h> 36180ea05bSTomas Winkler 372703d4b2STomas Winkler #include <linux/mei.h> 382703d4b2STomas Winkler 392703d4b2STomas Winkler #include "mei_dev.h" 402703d4b2STomas Winkler #include "client.h" 416e4cd27aSTomas Winkler #include "hw-me-regs.h" 426e4cd27aSTomas Winkler #include "hw-me.h" 432703d4b2STomas Winkler 442703d4b2STomas Winkler /* mei_pci_tbl - PCI Device ID Table */ 45a05f8f86STomas Winkler static const struct pci_device_id mei_me_pci_tbl[] = { 468d929d48SAlexander Usyskin {MEI_PCI_DEVICE(MEI_DEV_ID_82946GZ, mei_me_legacy_cfg)}, 478d929d48SAlexander Usyskin {MEI_PCI_DEVICE(MEI_DEV_ID_82G35, mei_me_legacy_cfg)}, 488d929d48SAlexander Usyskin {MEI_PCI_DEVICE(MEI_DEV_ID_82Q965, mei_me_legacy_cfg)}, 498d929d48SAlexander Usyskin {MEI_PCI_DEVICE(MEI_DEV_ID_82G965, mei_me_legacy_cfg)}, 508d929d48SAlexander Usyskin {MEI_PCI_DEVICE(MEI_DEV_ID_82GM965, mei_me_legacy_cfg)}, 518d929d48SAlexander Usyskin {MEI_PCI_DEVICE(MEI_DEV_ID_82GME965, mei_me_legacy_cfg)}, 528d929d48SAlexander Usyskin {MEI_PCI_DEVICE(MEI_DEV_ID_ICH9_82Q35, mei_me_legacy_cfg)}, 538d929d48SAlexander Usyskin {MEI_PCI_DEVICE(MEI_DEV_ID_ICH9_82G33, mei_me_legacy_cfg)}, 548d929d48SAlexander Usyskin {MEI_PCI_DEVICE(MEI_DEV_ID_ICH9_82Q33, mei_me_legacy_cfg)}, 558d929d48SAlexander Usyskin {MEI_PCI_DEVICE(MEI_DEV_ID_ICH9_82X38, mei_me_legacy_cfg)}, 568d929d48SAlexander Usyskin {MEI_PCI_DEVICE(MEI_DEV_ID_ICH9_3200, mei_me_legacy_cfg)}, 578d929d48SAlexander Usyskin 588d929d48SAlexander Usyskin {MEI_PCI_DEVICE(MEI_DEV_ID_ICH9_6, mei_me_legacy_cfg)}, 598d929d48SAlexander Usyskin {MEI_PCI_DEVICE(MEI_DEV_ID_ICH9_7, mei_me_legacy_cfg)}, 608d929d48SAlexander Usyskin {MEI_PCI_DEVICE(MEI_DEV_ID_ICH9_8, mei_me_legacy_cfg)}, 618d929d48SAlexander Usyskin {MEI_PCI_DEVICE(MEI_DEV_ID_ICH9_9, mei_me_legacy_cfg)}, 628d929d48SAlexander Usyskin {MEI_PCI_DEVICE(MEI_DEV_ID_ICH9_10, mei_me_legacy_cfg)}, 638d929d48SAlexander Usyskin {MEI_PCI_DEVICE(MEI_DEV_ID_ICH9M_1, mei_me_legacy_cfg)}, 648d929d48SAlexander Usyskin {MEI_PCI_DEVICE(MEI_DEV_ID_ICH9M_2, mei_me_legacy_cfg)}, 658d929d48SAlexander Usyskin {MEI_PCI_DEVICE(MEI_DEV_ID_ICH9M_3, mei_me_legacy_cfg)}, 668d929d48SAlexander Usyskin {MEI_PCI_DEVICE(MEI_DEV_ID_ICH9M_4, mei_me_legacy_cfg)}, 678d929d48SAlexander Usyskin {MEI_PCI_DEVICE(MEI_DEV_ID_ICH10_1, mei_me_ich_cfg)}, 688d929d48SAlexander Usyskin {MEI_PCI_DEVICE(MEI_DEV_ID_ICH10_2, mei_me_ich_cfg)}, 698d929d48SAlexander Usyskin {MEI_PCI_DEVICE(MEI_DEV_ID_ICH10_3, mei_me_ich_cfg)}, 708d929d48SAlexander Usyskin {MEI_PCI_DEVICE(MEI_DEV_ID_ICH10_4, mei_me_ich_cfg)}, 718d929d48SAlexander Usyskin 728d929d48SAlexander Usyskin {MEI_PCI_DEVICE(MEI_DEV_ID_IBXPK_1, mei_me_pch_cfg)}, 738d929d48SAlexander Usyskin {MEI_PCI_DEVICE(MEI_DEV_ID_IBXPK_2, mei_me_pch_cfg)}, 74c919951dSTomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_CPT_1, mei_me_pch_cpt_pbg_cfg)}, 75c919951dSTomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_PBG_1, mei_me_pch_cpt_pbg_cfg)}, 768d929d48SAlexander Usyskin {MEI_PCI_DEVICE(MEI_DEV_ID_PPT_1, mei_me_pch_cfg)}, 778d929d48SAlexander Usyskin {MEI_PCI_DEVICE(MEI_DEV_ID_PPT_2, mei_me_pch_cfg)}, 788d929d48SAlexander Usyskin {MEI_PCI_DEVICE(MEI_DEV_ID_PPT_3, mei_me_pch_cfg)}, 79c919951dSTomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_LPT_H, mei_me_lpt_cfg)}, 80c919951dSTomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_LPT_W, mei_me_lpt_cfg)}, 818d929d48SAlexander Usyskin {MEI_PCI_DEVICE(MEI_DEV_ID_LPT_LP, mei_me_pch_cfg)}, 82c919951dSTomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_LPT_HR, mei_me_lpt_cfg)}, 838d929d48SAlexander Usyskin {MEI_PCI_DEVICE(MEI_DEV_ID_WPT_LP, mei_me_pch_cfg)}, 842703d4b2STomas Winkler 852703d4b2STomas Winkler /* required last entry */ 862703d4b2STomas Winkler {0, } 872703d4b2STomas Winkler }; 882703d4b2STomas Winkler 89b68301e9STomas Winkler MODULE_DEVICE_TABLE(pci, mei_me_pci_tbl); 902703d4b2STomas Winkler 91e13fa90cSTomas Winkler #ifdef CONFIG_PM_RUNTIME 92e13fa90cSTomas Winkler static inline void mei_me_set_pm_domain(struct mei_device *dev); 93e13fa90cSTomas Winkler static inline void mei_me_unset_pm_domain(struct mei_device *dev); 94e13fa90cSTomas Winkler #else 95e13fa90cSTomas Winkler static inline void mei_me_set_pm_domain(struct mei_device *dev) {} 96e13fa90cSTomas Winkler static inline void mei_me_unset_pm_domain(struct mei_device *dev) {} 97e13fa90cSTomas Winkler #endif /* CONFIG_PM_RUNTIME */ 98e13fa90cSTomas Winkler 992703d4b2STomas Winkler /** 1002703d4b2STomas Winkler * mei_quirk_probe - probe for devices that doesn't valid ME interface 101393b148fSMasanari Iida * 1022703d4b2STomas Winkler * @pdev: PCI device structure 103c919951dSTomas Winkler * @cfg: per generation config 1042703d4b2STomas Winkler * 1052703d4b2STomas Winkler * returns true if ME Interface is valid, false otherwise 1062703d4b2STomas Winkler */ 107b68301e9STomas Winkler static bool mei_me_quirk_probe(struct pci_dev *pdev, 108c919951dSTomas Winkler const struct mei_cfg *cfg) 1092703d4b2STomas Winkler { 110c919951dSTomas Winkler if (cfg->quirk_probe && cfg->quirk_probe(pdev)) { 1112703d4b2STomas Winkler dev_info(&pdev->dev, "Device doesn't have valid ME Interface\n"); 1122703d4b2STomas Winkler return false; 1132703d4b2STomas Winkler } 114c919951dSTomas Winkler 115c919951dSTomas Winkler return true; 116c919951dSTomas Winkler } 117c919951dSTomas Winkler 1182703d4b2STomas Winkler /** 1192703d4b2STomas Winkler * mei_probe - Device Initialization Routine 1202703d4b2STomas Winkler * 1212703d4b2STomas Winkler * @pdev: PCI device structure 1222703d4b2STomas Winkler * @ent: entry in kcs_pci_tbl 1232703d4b2STomas Winkler * 1242703d4b2STomas Winkler * returns 0 on success, <0 on failure. 1252703d4b2STomas Winkler */ 126b68301e9STomas Winkler static int mei_me_probe(struct pci_dev *pdev, const struct pci_device_id *ent) 1272703d4b2STomas Winkler { 1288d929d48SAlexander Usyskin const struct mei_cfg *cfg = (struct mei_cfg *)(ent->driver_data); 1292703d4b2STomas Winkler struct mei_device *dev; 13052c34561STomas Winkler struct mei_me_hw *hw; 1312703d4b2STomas Winkler int err; 1322703d4b2STomas Winkler 1332703d4b2STomas Winkler 134c919951dSTomas Winkler if (!mei_me_quirk_probe(pdev, cfg)) 135c919951dSTomas Winkler return -ENODEV; 1362703d4b2STomas Winkler 1372703d4b2STomas Winkler /* enable pci dev */ 1382703d4b2STomas Winkler err = pci_enable_device(pdev); 1392703d4b2STomas Winkler if (err) { 1402703d4b2STomas Winkler dev_err(&pdev->dev, "failed to enable pci device.\n"); 1412703d4b2STomas Winkler goto end; 1422703d4b2STomas Winkler } 1432703d4b2STomas Winkler /* set PCI host mastering */ 1442703d4b2STomas Winkler pci_set_master(pdev); 1452703d4b2STomas Winkler /* pci request regions for mei driver */ 1462703d4b2STomas Winkler err = pci_request_regions(pdev, KBUILD_MODNAME); 1472703d4b2STomas Winkler if (err) { 1482703d4b2STomas Winkler dev_err(&pdev->dev, "failed to get pci regions.\n"); 1492703d4b2STomas Winkler goto disable_device; 1502703d4b2STomas Winkler } 1513ecfb168STomas Winkler 1523ecfb168STomas Winkler if (dma_set_mask(&pdev->dev, DMA_BIT_MASK(64)) || 1533ecfb168STomas Winkler dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64))) { 1543ecfb168STomas Winkler 1553ecfb168STomas Winkler err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32)); 1563ecfb168STomas Winkler if (err) 1573ecfb168STomas Winkler err = dma_set_coherent_mask(&pdev->dev, 1583ecfb168STomas Winkler DMA_BIT_MASK(32)); 1593ecfb168STomas Winkler } 1603ecfb168STomas Winkler if (err) { 1613ecfb168STomas Winkler dev_err(&pdev->dev, "No usable DMA configuration, aborting\n"); 1623ecfb168STomas Winkler goto release_regions; 1633ecfb168STomas Winkler } 1643ecfb168STomas Winkler 1653ecfb168STomas Winkler 1662703d4b2STomas Winkler /* allocates and initializes the mei dev structure */ 1678d929d48SAlexander Usyskin dev = mei_me_dev_init(pdev, cfg); 1682703d4b2STomas Winkler if (!dev) { 1692703d4b2STomas Winkler err = -ENOMEM; 1702703d4b2STomas Winkler goto release_regions; 1712703d4b2STomas Winkler } 17252c34561STomas Winkler hw = to_me_hw(dev); 1732703d4b2STomas Winkler /* mapping IO device memory */ 17452c34561STomas Winkler hw->mem_addr = pci_iomap(pdev, 0, 0); 17552c34561STomas Winkler if (!hw->mem_addr) { 1762703d4b2STomas Winkler dev_err(&pdev->dev, "mapping I/O device memory failure.\n"); 1772703d4b2STomas Winkler err = -ENOMEM; 1782703d4b2STomas Winkler goto free_device; 1792703d4b2STomas Winkler } 1802703d4b2STomas Winkler pci_enable_msi(pdev); 1812703d4b2STomas Winkler 1822703d4b2STomas Winkler /* request and enable interrupt */ 1832703d4b2STomas Winkler if (pci_dev_msi_enabled(pdev)) 1842703d4b2STomas Winkler err = request_threaded_irq(pdev->irq, 1852703d4b2STomas Winkler NULL, 18606ecd645STomas Winkler mei_me_irq_thread_handler, 1872703d4b2STomas Winkler IRQF_ONESHOT, KBUILD_MODNAME, dev); 1882703d4b2STomas Winkler else 1892703d4b2STomas Winkler err = request_threaded_irq(pdev->irq, 19006ecd645STomas Winkler mei_me_irq_quick_handler, 19106ecd645STomas Winkler mei_me_irq_thread_handler, 1922703d4b2STomas Winkler IRQF_SHARED, KBUILD_MODNAME, dev); 1932703d4b2STomas Winkler 1942703d4b2STomas Winkler if (err) { 1952703d4b2STomas Winkler dev_err(&pdev->dev, "request_threaded_irq failure. irq = %d\n", 1962703d4b2STomas Winkler pdev->irq); 1972703d4b2STomas Winkler goto disable_msi; 1982703d4b2STomas Winkler } 1992703d4b2STomas Winkler 200c4d589beSTomas Winkler if (mei_start(dev)) { 2012703d4b2STomas Winkler dev_err(&pdev->dev, "init hw failure.\n"); 2022703d4b2STomas Winkler err = -ENODEV; 2032703d4b2STomas Winkler goto release_irq; 2042703d4b2STomas Winkler } 2052703d4b2STomas Winkler 206180ea05bSTomas Winkler pm_runtime_set_autosuspend_delay(&pdev->dev, MEI_ME_RPM_TIMEOUT); 207180ea05bSTomas Winkler pm_runtime_use_autosuspend(&pdev->dev); 208180ea05bSTomas Winkler 209f3d8e878SAlexander Usyskin err = mei_register(dev, &pdev->dev); 2102703d4b2STomas Winkler if (err) 2112703d4b2STomas Winkler goto release_irq; 2122703d4b2STomas Winkler 2132703d4b2STomas Winkler pci_set_drvdata(pdev, dev); 2142703d4b2STomas Winkler 2152703d4b2STomas Winkler schedule_delayed_work(&dev->timer_work, HZ); 2162703d4b2STomas Winkler 217e13fa90cSTomas Winkler /* 218e13fa90cSTomas Winkler * For not wake-able HW runtime pm framework 219e13fa90cSTomas Winkler * can't be used on pci device level. 220e13fa90cSTomas Winkler * Use domain runtime pm callbacks instead. 221e13fa90cSTomas Winkler */ 222e13fa90cSTomas Winkler if (!pci_dev_run_wake(pdev)) 223e13fa90cSTomas Winkler mei_me_set_pm_domain(dev); 224e13fa90cSTomas Winkler 225180ea05bSTomas Winkler if (mei_pg_is_enabled(dev)) 226180ea05bSTomas Winkler pm_runtime_put_noidle(&pdev->dev); 227180ea05bSTomas Winkler 228c4e87b52SAlexander Usyskin dev_dbg(&pdev->dev, "initialization successful.\n"); 2292703d4b2STomas Winkler 2302703d4b2STomas Winkler return 0; 2312703d4b2STomas Winkler 2322703d4b2STomas Winkler release_irq: 233dc844b0dSTomas Winkler mei_cancel_work(dev); 2342703d4b2STomas Winkler mei_disable_interrupts(dev); 2352703d4b2STomas Winkler free_irq(pdev->irq, dev); 2362703d4b2STomas Winkler disable_msi: 2372703d4b2STomas Winkler pci_disable_msi(pdev); 23852c34561STomas Winkler pci_iounmap(pdev, hw->mem_addr); 2392703d4b2STomas Winkler free_device: 2402703d4b2STomas Winkler kfree(dev); 2412703d4b2STomas Winkler release_regions: 2422703d4b2STomas Winkler pci_release_regions(pdev); 2432703d4b2STomas Winkler disable_device: 2442703d4b2STomas Winkler pci_disable_device(pdev); 2452703d4b2STomas Winkler end: 2462703d4b2STomas Winkler dev_err(&pdev->dev, "initialization failed.\n"); 2472703d4b2STomas Winkler return err; 2482703d4b2STomas Winkler } 2492703d4b2STomas Winkler 2502703d4b2STomas Winkler /** 2512703d4b2STomas Winkler * mei_remove - Device Removal Routine 2522703d4b2STomas Winkler * 2532703d4b2STomas Winkler * @pdev: PCI device structure 2542703d4b2STomas Winkler * 2552703d4b2STomas Winkler * mei_remove is called by the PCI subsystem to alert the driver 2562703d4b2STomas Winkler * that it should release a PCI device. 2572703d4b2STomas Winkler */ 258b68301e9STomas Winkler static void mei_me_remove(struct pci_dev *pdev) 2592703d4b2STomas Winkler { 2602703d4b2STomas Winkler struct mei_device *dev; 26152c34561STomas Winkler struct mei_me_hw *hw; 2622703d4b2STomas Winkler 2632703d4b2STomas Winkler dev = pci_get_drvdata(pdev); 2642703d4b2STomas Winkler if (!dev) 2652703d4b2STomas Winkler return; 2662703d4b2STomas Winkler 267180ea05bSTomas Winkler if (mei_pg_is_enabled(dev)) 268180ea05bSTomas Winkler pm_runtime_get_noresume(&pdev->dev); 269180ea05bSTomas Winkler 27052c34561STomas Winkler hw = to_me_hw(dev); 27152c34561STomas Winkler 2722703d4b2STomas Winkler 273ed6f7ac1SPaul Bolle dev_dbg(&pdev->dev, "stop\n"); 2747cb035d9STomas Winkler mei_stop(dev); 2752703d4b2STomas Winkler 276e13fa90cSTomas Winkler if (!pci_dev_run_wake(pdev)) 277e13fa90cSTomas Winkler mei_me_unset_pm_domain(dev); 278e13fa90cSTomas Winkler 2792703d4b2STomas Winkler /* disable interrupts */ 2802703d4b2STomas Winkler mei_disable_interrupts(dev); 2812703d4b2STomas Winkler 2822703d4b2STomas Winkler free_irq(pdev->irq, dev); 2832703d4b2STomas Winkler pci_disable_msi(pdev); 2842703d4b2STomas Winkler 28552c34561STomas Winkler if (hw->mem_addr) 28652c34561STomas Winkler pci_iounmap(pdev, hw->mem_addr); 2872703d4b2STomas Winkler 28830e53bb8STomas Winkler mei_deregister(dev); 28930e53bb8STomas Winkler 2902703d4b2STomas Winkler kfree(dev); 2912703d4b2STomas Winkler 2922703d4b2STomas Winkler pci_release_regions(pdev); 2932703d4b2STomas Winkler pci_disable_device(pdev); 2942703d4b2STomas Winkler 2952703d4b2STomas Winkler 2962703d4b2STomas Winkler } 29716833257SAlexander Usyskin #ifdef CONFIG_PM_SLEEP 298b68301e9STomas Winkler static int mei_me_pci_suspend(struct device *device) 2992703d4b2STomas Winkler { 3002703d4b2STomas Winkler struct pci_dev *pdev = to_pci_dev(device); 3012703d4b2STomas Winkler struct mei_device *dev = pci_get_drvdata(pdev); 3022703d4b2STomas Winkler 3032703d4b2STomas Winkler if (!dev) 3042703d4b2STomas Winkler return -ENODEV; 3052703d4b2STomas Winkler 306ed6f7ac1SPaul Bolle dev_dbg(&pdev->dev, "suspend\n"); 3072703d4b2STomas Winkler 3087cb035d9STomas Winkler mei_stop(dev); 3097cb035d9STomas Winkler 3107cb035d9STomas Winkler mei_disable_interrupts(dev); 3112703d4b2STomas Winkler 3122703d4b2STomas Winkler free_irq(pdev->irq, dev); 3132703d4b2STomas Winkler pci_disable_msi(pdev); 3142703d4b2STomas Winkler 3157cb035d9STomas Winkler return 0; 3162703d4b2STomas Winkler } 3172703d4b2STomas Winkler 318b68301e9STomas Winkler static int mei_me_pci_resume(struct device *device) 3192703d4b2STomas Winkler { 3202703d4b2STomas Winkler struct pci_dev *pdev = to_pci_dev(device); 3212703d4b2STomas Winkler struct mei_device *dev; 3222703d4b2STomas Winkler int err; 3232703d4b2STomas Winkler 3242703d4b2STomas Winkler dev = pci_get_drvdata(pdev); 3252703d4b2STomas Winkler if (!dev) 3262703d4b2STomas Winkler return -ENODEV; 3272703d4b2STomas Winkler 3282703d4b2STomas Winkler pci_enable_msi(pdev); 3292703d4b2STomas Winkler 3302703d4b2STomas Winkler /* request and enable interrupt */ 3312703d4b2STomas Winkler if (pci_dev_msi_enabled(pdev)) 3322703d4b2STomas Winkler err = request_threaded_irq(pdev->irq, 3332703d4b2STomas Winkler NULL, 33406ecd645STomas Winkler mei_me_irq_thread_handler, 3352703d4b2STomas Winkler IRQF_ONESHOT, KBUILD_MODNAME, dev); 3362703d4b2STomas Winkler else 3372703d4b2STomas Winkler err = request_threaded_irq(pdev->irq, 33806ecd645STomas Winkler mei_me_irq_quick_handler, 33906ecd645STomas Winkler mei_me_irq_thread_handler, 3402703d4b2STomas Winkler IRQF_SHARED, KBUILD_MODNAME, dev); 3412703d4b2STomas Winkler 3422703d4b2STomas Winkler if (err) { 3432703d4b2STomas Winkler dev_err(&pdev->dev, "request_threaded_irq failed: irq = %d.\n", 3442703d4b2STomas Winkler pdev->irq); 3452703d4b2STomas Winkler return err; 3462703d4b2STomas Winkler } 3472703d4b2STomas Winkler 34833ec0826STomas Winkler err = mei_restart(dev); 34933ec0826STomas Winkler if (err) 35033ec0826STomas Winkler return err; 3512703d4b2STomas Winkler 3522703d4b2STomas Winkler /* Start timer if stopped in suspend */ 3532703d4b2STomas Winkler schedule_delayed_work(&dev->timer_work, HZ); 3542703d4b2STomas Winkler 35533ec0826STomas Winkler return 0; 3562703d4b2STomas Winkler } 357180ea05bSTomas Winkler #endif /* CONFIG_PM_SLEEP */ 35816833257SAlexander Usyskin 359180ea05bSTomas Winkler #ifdef CONFIG_PM_RUNTIME 360180ea05bSTomas Winkler static int mei_me_pm_runtime_idle(struct device *device) 361180ea05bSTomas Winkler { 362180ea05bSTomas Winkler struct pci_dev *pdev = to_pci_dev(device); 363180ea05bSTomas Winkler struct mei_device *dev; 364180ea05bSTomas Winkler 365180ea05bSTomas Winkler dev_dbg(&pdev->dev, "rpm: me: runtime_idle\n"); 366180ea05bSTomas Winkler 367180ea05bSTomas Winkler dev = pci_get_drvdata(pdev); 368180ea05bSTomas Winkler if (!dev) 369180ea05bSTomas Winkler return -ENODEV; 370180ea05bSTomas Winkler if (mei_write_is_idle(dev)) 371180ea05bSTomas Winkler pm_schedule_suspend(device, MEI_ME_RPM_TIMEOUT * 2); 372180ea05bSTomas Winkler 373180ea05bSTomas Winkler return -EBUSY; 374180ea05bSTomas Winkler } 375180ea05bSTomas Winkler 376180ea05bSTomas Winkler static int mei_me_pm_runtime_suspend(struct device *device) 377180ea05bSTomas Winkler { 378180ea05bSTomas Winkler struct pci_dev *pdev = to_pci_dev(device); 379180ea05bSTomas Winkler struct mei_device *dev; 380180ea05bSTomas Winkler int ret; 381180ea05bSTomas Winkler 382180ea05bSTomas Winkler dev_dbg(&pdev->dev, "rpm: me: runtime suspend\n"); 383180ea05bSTomas Winkler 384180ea05bSTomas Winkler dev = pci_get_drvdata(pdev); 385180ea05bSTomas Winkler if (!dev) 386180ea05bSTomas Winkler return -ENODEV; 387180ea05bSTomas Winkler 388180ea05bSTomas Winkler mutex_lock(&dev->device_lock); 389180ea05bSTomas Winkler 390180ea05bSTomas Winkler if (mei_write_is_idle(dev)) 391180ea05bSTomas Winkler ret = mei_me_pg_set_sync(dev); 392180ea05bSTomas Winkler else 393180ea05bSTomas Winkler ret = -EAGAIN; 394180ea05bSTomas Winkler 395180ea05bSTomas Winkler mutex_unlock(&dev->device_lock); 396180ea05bSTomas Winkler 397180ea05bSTomas Winkler dev_dbg(&pdev->dev, "rpm: me: runtime suspend ret=%d\n", ret); 398180ea05bSTomas Winkler 399180ea05bSTomas Winkler return ret; 400180ea05bSTomas Winkler } 401180ea05bSTomas Winkler 402180ea05bSTomas Winkler static int mei_me_pm_runtime_resume(struct device *device) 403180ea05bSTomas Winkler { 404180ea05bSTomas Winkler struct pci_dev *pdev = to_pci_dev(device); 405180ea05bSTomas Winkler struct mei_device *dev; 406180ea05bSTomas Winkler int ret; 407180ea05bSTomas Winkler 408180ea05bSTomas Winkler dev_dbg(&pdev->dev, "rpm: me: runtime resume\n"); 409180ea05bSTomas Winkler 410180ea05bSTomas Winkler dev = pci_get_drvdata(pdev); 411180ea05bSTomas Winkler if (!dev) 412180ea05bSTomas Winkler return -ENODEV; 413180ea05bSTomas Winkler 414180ea05bSTomas Winkler mutex_lock(&dev->device_lock); 415180ea05bSTomas Winkler 416180ea05bSTomas Winkler ret = mei_me_pg_unset_sync(dev); 417180ea05bSTomas Winkler 418180ea05bSTomas Winkler mutex_unlock(&dev->device_lock); 419180ea05bSTomas Winkler 420180ea05bSTomas Winkler dev_dbg(&pdev->dev, "rpm: me: runtime resume ret = %d\n", ret); 421180ea05bSTomas Winkler 422180ea05bSTomas Winkler return ret; 423180ea05bSTomas Winkler } 424e13fa90cSTomas Winkler 425e13fa90cSTomas Winkler /** 426e13fa90cSTomas Winkler * mei_me_set_pm_domain - fill and set pm domian stucture for device 427e13fa90cSTomas Winkler * 428e13fa90cSTomas Winkler * @dev: mei_device 429e13fa90cSTomas Winkler */ 430e13fa90cSTomas Winkler static inline void mei_me_set_pm_domain(struct mei_device *dev) 431e13fa90cSTomas Winkler { 432e13fa90cSTomas Winkler struct pci_dev *pdev = dev->pdev; 433e13fa90cSTomas Winkler 434e13fa90cSTomas Winkler if (pdev->dev.bus && pdev->dev.bus->pm) { 435e13fa90cSTomas Winkler dev->pg_domain.ops = *pdev->dev.bus->pm; 436e13fa90cSTomas Winkler 437e13fa90cSTomas Winkler dev->pg_domain.ops.runtime_suspend = mei_me_pm_runtime_suspend; 438e13fa90cSTomas Winkler dev->pg_domain.ops.runtime_resume = mei_me_pm_runtime_resume; 439e13fa90cSTomas Winkler dev->pg_domain.ops.runtime_idle = mei_me_pm_runtime_idle; 440e13fa90cSTomas Winkler 441e13fa90cSTomas Winkler pdev->dev.pm_domain = &dev->pg_domain; 442e13fa90cSTomas Winkler } 443e13fa90cSTomas Winkler } 444e13fa90cSTomas Winkler 445e13fa90cSTomas Winkler /** 446e13fa90cSTomas Winkler * mei_me_unset_pm_domain - clean pm domian stucture for device 447e13fa90cSTomas Winkler * 448e13fa90cSTomas Winkler * @dev: mei_device 449e13fa90cSTomas Winkler */ 450e13fa90cSTomas Winkler static inline void mei_me_unset_pm_domain(struct mei_device *dev) 451e13fa90cSTomas Winkler { 452e13fa90cSTomas Winkler /* stop using pm callbacks if any */ 453e13fa90cSTomas Winkler dev->pdev->dev.pm_domain = NULL; 454e13fa90cSTomas Winkler } 455180ea05bSTomas Winkler #endif /* CONFIG_PM_RUNTIME */ 456180ea05bSTomas Winkler 457180ea05bSTomas Winkler #ifdef CONFIG_PM 458180ea05bSTomas Winkler static const struct dev_pm_ops mei_me_pm_ops = { 459180ea05bSTomas Winkler SET_SYSTEM_SLEEP_PM_OPS(mei_me_pci_suspend, 460180ea05bSTomas Winkler mei_me_pci_resume) 461180ea05bSTomas Winkler SET_RUNTIME_PM_OPS( 462180ea05bSTomas Winkler mei_me_pm_runtime_suspend, 463180ea05bSTomas Winkler mei_me_pm_runtime_resume, 464180ea05bSTomas Winkler mei_me_pm_runtime_idle) 465180ea05bSTomas Winkler }; 466180ea05bSTomas Winkler 467b68301e9STomas Winkler #define MEI_ME_PM_OPS (&mei_me_pm_ops) 4682703d4b2STomas Winkler #else 469b68301e9STomas Winkler #define MEI_ME_PM_OPS NULL 470180ea05bSTomas Winkler #endif /* CONFIG_PM */ 4712703d4b2STomas Winkler /* 4722703d4b2STomas Winkler * PCI driver structure 4732703d4b2STomas Winkler */ 474b68301e9STomas Winkler static struct pci_driver mei_me_driver = { 4752703d4b2STomas Winkler .name = KBUILD_MODNAME, 476b68301e9STomas Winkler .id_table = mei_me_pci_tbl, 477b68301e9STomas Winkler .probe = mei_me_probe, 478b68301e9STomas Winkler .remove = mei_me_remove, 479b68301e9STomas Winkler .shutdown = mei_me_remove, 480b68301e9STomas Winkler .driver.pm = MEI_ME_PM_OPS, 4812703d4b2STomas Winkler }; 4822703d4b2STomas Winkler 483b68301e9STomas Winkler module_pci_driver(mei_me_driver); 4842703d4b2STomas Winkler 4852703d4b2STomas Winkler MODULE_AUTHOR("Intel Corporation"); 4862703d4b2STomas Winkler MODULE_DESCRIPTION("Intel(R) Management Engine Interface"); 4872703d4b2STomas Winkler MODULE_LICENSE("GPL v2"); 488