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/pci.h> 252703d4b2STomas Winkler #include <linux/poll.h> 262703d4b2STomas Winkler #include <linux/ioctl.h> 272703d4b2STomas Winkler #include <linux/cdev.h> 282703d4b2STomas Winkler #include <linux/sched.h> 292703d4b2STomas Winkler #include <linux/uuid.h> 302703d4b2STomas Winkler #include <linux/compat.h> 312703d4b2STomas Winkler #include <linux/jiffies.h> 322703d4b2STomas Winkler #include <linux/interrupt.h> 332703d4b2STomas Winkler 34989561deSTomeu Vizoso #include <linux/pm_domain.h> 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)}, 79edca5ea3SAlexander Usyskin {MEI_PCI_DEVICE(MEI_DEV_ID_LPT_H, mei_me_pch8_sps_cfg)}, 80edca5ea3SAlexander Usyskin {MEI_PCI_DEVICE(MEI_DEV_ID_LPT_W, mei_me_pch8_sps_cfg)}, 81edca5ea3SAlexander Usyskin {MEI_PCI_DEVICE(MEI_DEV_ID_LPT_LP, mei_me_pch8_cfg)}, 82edca5ea3SAlexander Usyskin {MEI_PCI_DEVICE(MEI_DEV_ID_LPT_HR, mei_me_pch8_sps_cfg)}, 83edca5ea3SAlexander Usyskin {MEI_PCI_DEVICE(MEI_DEV_ID_WPT_LP, mei_me_pch8_cfg)}, 84edca5ea3SAlexander Usyskin {MEI_PCI_DEVICE(MEI_DEV_ID_WPT_LP_2, mei_me_pch8_cfg)}, 852703d4b2STomas Winkler 861625c7ecSTomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_SPT, mei_me_pch8_cfg)}, 871625c7ecSTomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_SPT_2, mei_me_pch8_cfg)}, 888c57cac1STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_SPT_H, mei_me_pch8_sps_cfg)}, 898c57cac1STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_SPT_H_2, mei_me_pch8_sps_cfg)}, 909ff2007bSTomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_LBG, mei_me_pch8_cfg)}, 911625c7ecSTomas Winkler 92dd16f6cdSTomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_BXT_M, mei_me_pch8_cfg)}, 93dd16f6cdSTomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_APL_I, mei_me_pch8_cfg)}, 94dd16f6cdSTomas Winkler 95ac182e8aSAlexander Usyskin {MEI_PCI_DEVICE(MEI_DEV_ID_KBP, mei_me_pch8_cfg)}, 96ac182e8aSAlexander Usyskin {MEI_PCI_DEVICE(MEI_DEV_ID_KBP_2, mei_me_pch8_cfg)}, 97ac182e8aSAlexander Usyskin 982703d4b2STomas Winkler /* required last entry */ 992703d4b2STomas Winkler {0, } 1002703d4b2STomas Winkler }; 1012703d4b2STomas Winkler 102b68301e9STomas Winkler MODULE_DEVICE_TABLE(pci, mei_me_pci_tbl); 1032703d4b2STomas Winkler 104bbd6d050SRafael J. Wysocki #ifdef CONFIG_PM 105e13fa90cSTomas Winkler static inline void mei_me_set_pm_domain(struct mei_device *dev); 106e13fa90cSTomas Winkler static inline void mei_me_unset_pm_domain(struct mei_device *dev); 107e13fa90cSTomas Winkler #else 108e13fa90cSTomas Winkler static inline void mei_me_set_pm_domain(struct mei_device *dev) {} 109e13fa90cSTomas Winkler static inline void mei_me_unset_pm_domain(struct mei_device *dev) {} 110bbd6d050SRafael J. Wysocki #endif /* CONFIG_PM */ 111e13fa90cSTomas Winkler 1122703d4b2STomas Winkler /** 113ce23139cSAlexander Usyskin * mei_me_quirk_probe - probe for devices that doesn't valid ME interface 114393b148fSMasanari Iida * 1152703d4b2STomas Winkler * @pdev: PCI device structure 116c919951dSTomas Winkler * @cfg: per generation config 1172703d4b2STomas Winkler * 118a8605ea2SAlexander Usyskin * Return: true if ME Interface is valid, false otherwise 1192703d4b2STomas Winkler */ 120b68301e9STomas Winkler static bool mei_me_quirk_probe(struct pci_dev *pdev, 121c919951dSTomas Winkler const struct mei_cfg *cfg) 1222703d4b2STomas Winkler { 123c919951dSTomas Winkler if (cfg->quirk_probe && cfg->quirk_probe(pdev)) { 1242703d4b2STomas Winkler dev_info(&pdev->dev, "Device doesn't have valid ME Interface\n"); 1252703d4b2STomas Winkler return false; 1262703d4b2STomas Winkler } 127c919951dSTomas Winkler 128c919951dSTomas Winkler return true; 129c919951dSTomas Winkler } 130c919951dSTomas Winkler 1312703d4b2STomas Winkler /** 132ce23139cSAlexander Usyskin * mei_me_probe - Device Initialization Routine 1332703d4b2STomas Winkler * 1342703d4b2STomas Winkler * @pdev: PCI device structure 1352703d4b2STomas Winkler * @ent: entry in kcs_pci_tbl 1362703d4b2STomas Winkler * 137a8605ea2SAlexander Usyskin * Return: 0 on success, <0 on failure. 1382703d4b2STomas Winkler */ 139b68301e9STomas Winkler static int mei_me_probe(struct pci_dev *pdev, const struct pci_device_id *ent) 1402703d4b2STomas Winkler { 1418d929d48SAlexander Usyskin const struct mei_cfg *cfg = (struct mei_cfg *)(ent->driver_data); 1422703d4b2STomas Winkler struct mei_device *dev; 14352c34561STomas Winkler struct mei_me_hw *hw; 1441fa55b4eSAlexander Usyskin unsigned int irqflags; 1452703d4b2STomas Winkler int err; 1462703d4b2STomas Winkler 1472703d4b2STomas Winkler 148c919951dSTomas Winkler if (!mei_me_quirk_probe(pdev, cfg)) 149c919951dSTomas Winkler return -ENODEV; 1502703d4b2STomas Winkler 1512703d4b2STomas Winkler /* enable pci dev */ 152f8a09605STomas Winkler err = pcim_enable_device(pdev); 1532703d4b2STomas Winkler if (err) { 1542703d4b2STomas Winkler dev_err(&pdev->dev, "failed to enable pci device.\n"); 1552703d4b2STomas Winkler goto end; 1562703d4b2STomas Winkler } 1572703d4b2STomas Winkler /* set PCI host mastering */ 1582703d4b2STomas Winkler pci_set_master(pdev); 159f8a09605STomas Winkler /* pci request regions and mapping IO device memory for mei driver */ 160f8a09605STomas Winkler err = pcim_iomap_regions(pdev, BIT(0), KBUILD_MODNAME); 1612703d4b2STomas Winkler if (err) { 1622703d4b2STomas Winkler dev_err(&pdev->dev, "failed to get pci regions.\n"); 163f8a09605STomas Winkler goto end; 1642703d4b2STomas Winkler } 1653ecfb168STomas Winkler 1663ecfb168STomas Winkler if (dma_set_mask(&pdev->dev, DMA_BIT_MASK(64)) || 1673ecfb168STomas Winkler dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64))) { 1683ecfb168STomas Winkler 1693ecfb168STomas Winkler err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32)); 1703ecfb168STomas Winkler if (err) 1713ecfb168STomas Winkler err = dma_set_coherent_mask(&pdev->dev, 1723ecfb168STomas Winkler DMA_BIT_MASK(32)); 1733ecfb168STomas Winkler } 1743ecfb168STomas Winkler if (err) { 1753ecfb168STomas Winkler dev_err(&pdev->dev, "No usable DMA configuration, aborting\n"); 176f8a09605STomas Winkler goto end; 1773ecfb168STomas Winkler } 1783ecfb168STomas Winkler 1792703d4b2STomas Winkler /* allocates and initializes the mei dev structure */ 1808d929d48SAlexander Usyskin dev = mei_me_dev_init(pdev, cfg); 1812703d4b2STomas Winkler if (!dev) { 1822703d4b2STomas Winkler err = -ENOMEM; 183f8a09605STomas Winkler goto end; 1842703d4b2STomas Winkler } 18552c34561STomas Winkler hw = to_me_hw(dev); 186f8a09605STomas Winkler hw->mem_addr = pcim_iomap_table(pdev)[0]; 187f8a09605STomas Winkler 1882703d4b2STomas Winkler pci_enable_msi(pdev); 1892703d4b2STomas Winkler 1902703d4b2STomas Winkler /* request and enable interrupt */ 1911fa55b4eSAlexander Usyskin irqflags = pci_dev_msi_enabled(pdev) ? IRQF_ONESHOT : IRQF_SHARED; 1921fa55b4eSAlexander Usyskin 1932703d4b2STomas Winkler err = request_threaded_irq(pdev->irq, 19406ecd645STomas Winkler mei_me_irq_quick_handler, 19506ecd645STomas Winkler mei_me_irq_thread_handler, 1961fa55b4eSAlexander Usyskin irqflags, KBUILD_MODNAME, dev); 1972703d4b2STomas Winkler if (err) { 1982703d4b2STomas Winkler dev_err(&pdev->dev, "request_threaded_irq failure. irq = %d\n", 1992703d4b2STomas Winkler pdev->irq); 200f8a09605STomas Winkler goto end; 2012703d4b2STomas Winkler } 2022703d4b2STomas Winkler 203c4d589beSTomas Winkler if (mei_start(dev)) { 2042703d4b2STomas Winkler dev_err(&pdev->dev, "init hw failure.\n"); 2052703d4b2STomas Winkler err = -ENODEV; 2062703d4b2STomas Winkler goto release_irq; 2072703d4b2STomas Winkler } 2082703d4b2STomas Winkler 209180ea05bSTomas Winkler pm_runtime_set_autosuspend_delay(&pdev->dev, MEI_ME_RPM_TIMEOUT); 210180ea05bSTomas Winkler pm_runtime_use_autosuspend(&pdev->dev); 211180ea05bSTomas Winkler 212f3d8e878SAlexander Usyskin err = mei_register(dev, &pdev->dev); 2132703d4b2STomas Winkler if (err) 2141f7e489aSAlexander Usyskin goto stop; 2152703d4b2STomas Winkler 2162703d4b2STomas Winkler pci_set_drvdata(pdev, dev); 2172703d4b2STomas Winkler 218e13fa90cSTomas Winkler /* 219e13fa90cSTomas Winkler * For not wake-able HW runtime pm framework 220e13fa90cSTomas Winkler * can't be used on pci device level. 221e13fa90cSTomas Winkler * Use domain runtime pm callbacks instead. 222e13fa90cSTomas Winkler */ 223e13fa90cSTomas Winkler if (!pci_dev_run_wake(pdev)) 224e13fa90cSTomas Winkler mei_me_set_pm_domain(dev); 225e13fa90cSTomas Winkler 226180ea05bSTomas Winkler if (mei_pg_is_enabled(dev)) 227180ea05bSTomas Winkler pm_runtime_put_noidle(&pdev->dev); 228180ea05bSTomas Winkler 229c4e87b52SAlexander Usyskin dev_dbg(&pdev->dev, "initialization successful.\n"); 2302703d4b2STomas Winkler 2312703d4b2STomas Winkler return 0; 2322703d4b2STomas Winkler 2331f7e489aSAlexander Usyskin stop: 2341f7e489aSAlexander Usyskin mei_stop(dev); 2352703d4b2STomas Winkler release_irq: 236dc844b0dSTomas Winkler mei_cancel_work(dev); 2372703d4b2STomas Winkler mei_disable_interrupts(dev); 2382703d4b2STomas Winkler free_irq(pdev->irq, dev); 2392703d4b2STomas Winkler end: 2402703d4b2STomas Winkler dev_err(&pdev->dev, "initialization failed.\n"); 2412703d4b2STomas Winkler return err; 2422703d4b2STomas Winkler } 2432703d4b2STomas Winkler 2442703d4b2STomas Winkler /** 245ce23139cSAlexander Usyskin * mei_me_remove - Device Removal Routine 2462703d4b2STomas Winkler * 2472703d4b2STomas Winkler * @pdev: PCI device structure 2482703d4b2STomas Winkler * 2492703d4b2STomas Winkler * mei_remove is called by the PCI subsystem to alert the driver 2502703d4b2STomas Winkler * that it should release a PCI device. 2512703d4b2STomas Winkler */ 252b68301e9STomas Winkler static void mei_me_remove(struct pci_dev *pdev) 2532703d4b2STomas Winkler { 2542703d4b2STomas Winkler struct mei_device *dev; 2552703d4b2STomas Winkler 2562703d4b2STomas Winkler dev = pci_get_drvdata(pdev); 2572703d4b2STomas Winkler if (!dev) 2582703d4b2STomas Winkler return; 2592703d4b2STomas Winkler 260180ea05bSTomas Winkler if (mei_pg_is_enabled(dev)) 261180ea05bSTomas Winkler pm_runtime_get_noresume(&pdev->dev); 262180ea05bSTomas Winkler 263ed6f7ac1SPaul Bolle dev_dbg(&pdev->dev, "stop\n"); 2647cb035d9STomas Winkler mei_stop(dev); 2652703d4b2STomas Winkler 266e13fa90cSTomas Winkler if (!pci_dev_run_wake(pdev)) 267e13fa90cSTomas Winkler mei_me_unset_pm_domain(dev); 268e13fa90cSTomas Winkler 2692703d4b2STomas Winkler mei_disable_interrupts(dev); 2702703d4b2STomas Winkler 2712703d4b2STomas Winkler free_irq(pdev->irq, dev); 2722703d4b2STomas Winkler 27330e53bb8STomas Winkler mei_deregister(dev); 2742703d4b2STomas Winkler } 275f8a09605STomas Winkler 27616833257SAlexander Usyskin #ifdef CONFIG_PM_SLEEP 277b68301e9STomas Winkler static int mei_me_pci_suspend(struct device *device) 2782703d4b2STomas Winkler { 2792703d4b2STomas Winkler struct pci_dev *pdev = to_pci_dev(device); 2802703d4b2STomas Winkler struct mei_device *dev = pci_get_drvdata(pdev); 2812703d4b2STomas Winkler 2822703d4b2STomas Winkler if (!dev) 2832703d4b2STomas Winkler return -ENODEV; 2842703d4b2STomas Winkler 285ed6f7ac1SPaul Bolle dev_dbg(&pdev->dev, "suspend\n"); 2862703d4b2STomas Winkler 2877cb035d9STomas Winkler mei_stop(dev); 2887cb035d9STomas Winkler 2897cb035d9STomas Winkler mei_disable_interrupts(dev); 2902703d4b2STomas Winkler 2912703d4b2STomas Winkler free_irq(pdev->irq, dev); 2922703d4b2STomas Winkler pci_disable_msi(pdev); 2932703d4b2STomas Winkler 2947cb035d9STomas Winkler return 0; 2952703d4b2STomas Winkler } 2962703d4b2STomas Winkler 297b68301e9STomas Winkler static int mei_me_pci_resume(struct device *device) 2982703d4b2STomas Winkler { 2992703d4b2STomas Winkler struct pci_dev *pdev = to_pci_dev(device); 3002703d4b2STomas Winkler struct mei_device *dev; 3011fa55b4eSAlexander Usyskin unsigned int irqflags; 3022703d4b2STomas Winkler int err; 3032703d4b2STomas Winkler 3042703d4b2STomas Winkler dev = pci_get_drvdata(pdev); 3052703d4b2STomas Winkler if (!dev) 3062703d4b2STomas Winkler return -ENODEV; 3072703d4b2STomas Winkler 3082703d4b2STomas Winkler pci_enable_msi(pdev); 3092703d4b2STomas Winkler 3101fa55b4eSAlexander Usyskin irqflags = pci_dev_msi_enabled(pdev) ? IRQF_ONESHOT : IRQF_SHARED; 3111fa55b4eSAlexander Usyskin 3122703d4b2STomas Winkler /* request and enable interrupt */ 3132703d4b2STomas Winkler err = request_threaded_irq(pdev->irq, 31406ecd645STomas Winkler mei_me_irq_quick_handler, 31506ecd645STomas Winkler mei_me_irq_thread_handler, 3161fa55b4eSAlexander Usyskin irqflags, KBUILD_MODNAME, dev); 3172703d4b2STomas Winkler 3182703d4b2STomas Winkler if (err) { 3192703d4b2STomas Winkler dev_err(&pdev->dev, "request_threaded_irq failed: irq = %d.\n", 3202703d4b2STomas Winkler pdev->irq); 3212703d4b2STomas Winkler return err; 3222703d4b2STomas Winkler } 3232703d4b2STomas Winkler 32433ec0826STomas Winkler err = mei_restart(dev); 32533ec0826STomas Winkler if (err) 32633ec0826STomas Winkler return err; 3272703d4b2STomas Winkler 3282703d4b2STomas Winkler /* Start timer if stopped in suspend */ 3292703d4b2STomas Winkler schedule_delayed_work(&dev->timer_work, HZ); 3302703d4b2STomas Winkler 33133ec0826STomas Winkler return 0; 3322703d4b2STomas Winkler } 333180ea05bSTomas Winkler #endif /* CONFIG_PM_SLEEP */ 33416833257SAlexander Usyskin 335bbd6d050SRafael J. Wysocki #ifdef CONFIG_PM 336180ea05bSTomas Winkler static int mei_me_pm_runtime_idle(struct device *device) 337180ea05bSTomas Winkler { 338180ea05bSTomas Winkler struct pci_dev *pdev = to_pci_dev(device); 339180ea05bSTomas Winkler struct mei_device *dev; 340180ea05bSTomas Winkler 341180ea05bSTomas Winkler dev_dbg(&pdev->dev, "rpm: me: runtime_idle\n"); 342180ea05bSTomas Winkler 343180ea05bSTomas Winkler dev = pci_get_drvdata(pdev); 344180ea05bSTomas Winkler if (!dev) 345180ea05bSTomas Winkler return -ENODEV; 346180ea05bSTomas Winkler if (mei_write_is_idle(dev)) 347d5d83f8aSAlexander Usyskin pm_runtime_autosuspend(device); 348180ea05bSTomas Winkler 349180ea05bSTomas Winkler return -EBUSY; 350180ea05bSTomas Winkler } 351180ea05bSTomas Winkler 352180ea05bSTomas Winkler static int mei_me_pm_runtime_suspend(struct device *device) 353180ea05bSTomas Winkler { 354180ea05bSTomas Winkler struct pci_dev *pdev = to_pci_dev(device); 355180ea05bSTomas Winkler struct mei_device *dev; 356180ea05bSTomas Winkler int ret; 357180ea05bSTomas Winkler 358180ea05bSTomas Winkler dev_dbg(&pdev->dev, "rpm: me: runtime suspend\n"); 359180ea05bSTomas Winkler 360180ea05bSTomas Winkler dev = pci_get_drvdata(pdev); 361180ea05bSTomas Winkler if (!dev) 362180ea05bSTomas Winkler return -ENODEV; 363180ea05bSTomas Winkler 364180ea05bSTomas Winkler mutex_lock(&dev->device_lock); 365180ea05bSTomas Winkler 366180ea05bSTomas Winkler if (mei_write_is_idle(dev)) 3672d1995fcSAlexander Usyskin ret = mei_me_pg_enter_sync(dev); 368180ea05bSTomas Winkler else 369180ea05bSTomas Winkler ret = -EAGAIN; 370180ea05bSTomas Winkler 371180ea05bSTomas Winkler mutex_unlock(&dev->device_lock); 372180ea05bSTomas Winkler 373180ea05bSTomas Winkler dev_dbg(&pdev->dev, "rpm: me: runtime suspend ret=%d\n", ret); 374180ea05bSTomas Winkler 37577537ad2SAlexander Usyskin if (ret && ret != -EAGAIN) 37677537ad2SAlexander Usyskin schedule_work(&dev->reset_work); 37777537ad2SAlexander Usyskin 378180ea05bSTomas Winkler return ret; 379180ea05bSTomas Winkler } 380180ea05bSTomas Winkler 381180ea05bSTomas Winkler static int mei_me_pm_runtime_resume(struct device *device) 382180ea05bSTomas Winkler { 383180ea05bSTomas Winkler struct pci_dev *pdev = to_pci_dev(device); 384180ea05bSTomas Winkler struct mei_device *dev; 385180ea05bSTomas Winkler int ret; 386180ea05bSTomas Winkler 387180ea05bSTomas Winkler dev_dbg(&pdev->dev, "rpm: me: runtime resume\n"); 388180ea05bSTomas Winkler 389180ea05bSTomas Winkler dev = pci_get_drvdata(pdev); 390180ea05bSTomas Winkler if (!dev) 391180ea05bSTomas Winkler return -ENODEV; 392180ea05bSTomas Winkler 393180ea05bSTomas Winkler mutex_lock(&dev->device_lock); 394180ea05bSTomas Winkler 3952d1995fcSAlexander Usyskin ret = mei_me_pg_exit_sync(dev); 396180ea05bSTomas Winkler 397180ea05bSTomas Winkler mutex_unlock(&dev->device_lock); 398180ea05bSTomas Winkler 399180ea05bSTomas Winkler dev_dbg(&pdev->dev, "rpm: me: runtime resume ret = %d\n", ret); 400180ea05bSTomas Winkler 40177537ad2SAlexander Usyskin if (ret) 40277537ad2SAlexander Usyskin schedule_work(&dev->reset_work); 40377537ad2SAlexander Usyskin 404180ea05bSTomas Winkler return ret; 405180ea05bSTomas Winkler } 406e13fa90cSTomas Winkler 407e13fa90cSTomas Winkler /** 4087efceb55SGeert Uytterhoeven * mei_me_set_pm_domain - fill and set pm domain structure for device 409e13fa90cSTomas Winkler * 410e13fa90cSTomas Winkler * @dev: mei_device 411e13fa90cSTomas Winkler */ 412e13fa90cSTomas Winkler static inline void mei_me_set_pm_domain(struct mei_device *dev) 413e13fa90cSTomas Winkler { 414d08b8fc0STomas Winkler struct pci_dev *pdev = to_pci_dev(dev->dev); 415e13fa90cSTomas Winkler 416e13fa90cSTomas Winkler if (pdev->dev.bus && pdev->dev.bus->pm) { 417e13fa90cSTomas Winkler dev->pg_domain.ops = *pdev->dev.bus->pm; 418e13fa90cSTomas Winkler 419e13fa90cSTomas Winkler dev->pg_domain.ops.runtime_suspend = mei_me_pm_runtime_suspend; 420e13fa90cSTomas Winkler dev->pg_domain.ops.runtime_resume = mei_me_pm_runtime_resume; 421e13fa90cSTomas Winkler dev->pg_domain.ops.runtime_idle = mei_me_pm_runtime_idle; 422e13fa90cSTomas Winkler 423989561deSTomeu Vizoso dev_pm_domain_set(&pdev->dev, &dev->pg_domain); 424e13fa90cSTomas Winkler } 425e13fa90cSTomas Winkler } 426e13fa90cSTomas Winkler 427e13fa90cSTomas Winkler /** 4287efceb55SGeert Uytterhoeven * mei_me_unset_pm_domain - clean pm domain structure for device 429e13fa90cSTomas Winkler * 430e13fa90cSTomas Winkler * @dev: mei_device 431e13fa90cSTomas Winkler */ 432e13fa90cSTomas Winkler static inline void mei_me_unset_pm_domain(struct mei_device *dev) 433e13fa90cSTomas Winkler { 434e13fa90cSTomas Winkler /* stop using pm callbacks if any */ 435989561deSTomeu Vizoso dev_pm_domain_set(dev->dev, NULL); 436e13fa90cSTomas Winkler } 437180ea05bSTomas Winkler 438180ea05bSTomas Winkler static const struct dev_pm_ops mei_me_pm_ops = { 439180ea05bSTomas Winkler SET_SYSTEM_SLEEP_PM_OPS(mei_me_pci_suspend, 440180ea05bSTomas Winkler mei_me_pci_resume) 441180ea05bSTomas Winkler SET_RUNTIME_PM_OPS( 442180ea05bSTomas Winkler mei_me_pm_runtime_suspend, 443180ea05bSTomas Winkler mei_me_pm_runtime_resume, 444180ea05bSTomas Winkler mei_me_pm_runtime_idle) 445180ea05bSTomas Winkler }; 446180ea05bSTomas Winkler 447b68301e9STomas Winkler #define MEI_ME_PM_OPS (&mei_me_pm_ops) 4482703d4b2STomas Winkler #else 449b68301e9STomas Winkler #define MEI_ME_PM_OPS NULL 450180ea05bSTomas Winkler #endif /* CONFIG_PM */ 4512703d4b2STomas Winkler /* 4522703d4b2STomas Winkler * PCI driver structure 4532703d4b2STomas Winkler */ 454b68301e9STomas Winkler static struct pci_driver mei_me_driver = { 4552703d4b2STomas Winkler .name = KBUILD_MODNAME, 456b68301e9STomas Winkler .id_table = mei_me_pci_tbl, 457b68301e9STomas Winkler .probe = mei_me_probe, 458b68301e9STomas Winkler .remove = mei_me_remove, 459b68301e9STomas Winkler .shutdown = mei_me_remove, 460b68301e9STomas Winkler .driver.pm = MEI_ME_PM_OPS, 4612703d4b2STomas Winkler }; 4622703d4b2STomas Winkler 463b68301e9STomas Winkler module_pci_driver(mei_me_driver); 4642703d4b2STomas Winkler 4652703d4b2STomas Winkler MODULE_AUTHOR("Intel Corporation"); 4662703d4b2STomas Winkler MODULE_DESCRIPTION("Intel(R) Management Engine Interface"); 4672703d4b2STomas Winkler MODULE_LICENSE("GPL v2"); 468