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[] = { 46f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_82946GZ, MEI_ME_ICH_CFG)}, 47f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_82G35, MEI_ME_ICH_CFG)}, 48f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_82Q965, MEI_ME_ICH_CFG)}, 49f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_82G965, MEI_ME_ICH_CFG)}, 50f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_82GM965, MEI_ME_ICH_CFG)}, 51f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_82GME965, MEI_ME_ICH_CFG)}, 52f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_ICH9_82Q35, MEI_ME_ICH_CFG)}, 53f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_ICH9_82G33, MEI_ME_ICH_CFG)}, 54f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_ICH9_82Q33, MEI_ME_ICH_CFG)}, 55f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_ICH9_82X38, MEI_ME_ICH_CFG)}, 56f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_ICH9_3200, MEI_ME_ICH_CFG)}, 578d929d48SAlexander Usyskin 58f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_ICH9_6, MEI_ME_ICH_CFG)}, 59f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_ICH9_7, MEI_ME_ICH_CFG)}, 60f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_ICH9_8, MEI_ME_ICH_CFG)}, 61f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_ICH9_9, MEI_ME_ICH_CFG)}, 62f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_ICH9_10, MEI_ME_ICH_CFG)}, 63f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_ICH9M_1, MEI_ME_ICH_CFG)}, 64f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_ICH9M_2, MEI_ME_ICH_CFG)}, 65f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_ICH9M_3, MEI_ME_ICH_CFG)}, 66f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_ICH9M_4, MEI_ME_ICH_CFG)}, 678d929d48SAlexander Usyskin 68f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_ICH10_1, MEI_ME_ICH10_CFG)}, 69f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_ICH10_2, MEI_ME_ICH10_CFG)}, 70f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_ICH10_3, MEI_ME_ICH10_CFG)}, 71f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_ICH10_4, MEI_ME_ICH10_CFG)}, 722703d4b2STomas Winkler 73f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_IBXPK_1, MEI_ME_PCH_CFG)}, 74f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_IBXPK_2, MEI_ME_PCH_CFG)}, 75f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_CPT_1, MEI_ME_PCH_CPT_PBG_CFG)}, 76f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_PBG_1, MEI_ME_PCH_CPT_PBG_CFG)}, 77f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_PPT_1, MEI_ME_PCH_CFG)}, 78f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_PPT_2, MEI_ME_PCH_CFG)}, 79f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_PPT_3, MEI_ME_PCH_CFG)}, 80f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_LPT_H, MEI_ME_PCH8_SPS_CFG)}, 81f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_LPT_W, MEI_ME_PCH8_SPS_CFG)}, 82f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_LPT_LP, MEI_ME_PCH8_CFG)}, 83f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_LPT_HR, MEI_ME_PCH8_SPS_CFG)}, 84f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_WPT_LP, MEI_ME_PCH8_CFG)}, 85f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_WPT_LP_2, MEI_ME_PCH8_CFG)}, 861625c7ecSTomas Winkler 87f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_SPT, MEI_ME_PCH8_CFG)}, 88f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_SPT_2, MEI_ME_PCH8_CFG)}, 89f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_SPT_H, MEI_ME_PCH8_SPS_CFG)}, 90f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_SPT_H_2, MEI_ME_PCH8_SPS_CFG)}, 91173436baSAlexander Usyskin {MEI_PCI_DEVICE(MEI_DEV_ID_LBG, MEI_ME_PCH12_CFG)}, 92dd16f6cdSTomas Winkler 93f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_BXT_M, MEI_ME_PCH8_CFG)}, 94f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_APL_I, MEI_ME_PCH8_CFG)}, 95f5ac3c49STomas Winkler 96f7ee8eadSTomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_DNV_IE, MEI_ME_PCH8_CFG)}, 97f7ee8eadSTomas Winkler 98688cb678STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_GLK, MEI_ME_PCH8_CFG)}, 99688cb678STomas Winkler 100f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_KBP, MEI_ME_PCH8_CFG)}, 101f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_KBP_2, MEI_ME_PCH8_CFG)}, 102ac182e8aSAlexander Usyskin 1031dbfe7f2SAlexander Usyskin {MEI_PCI_DEVICE(MEI_DEV_ID_CNP_LP, MEI_ME_PCH12_CFG)}, 1042a4ac172STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_CNP_LP_4, MEI_ME_PCH8_CFG)}, 1051dbfe7f2SAlexander Usyskin {MEI_PCI_DEVICE(MEI_DEV_ID_CNP_H, MEI_ME_PCH12_CFG)}, 1062a4ac172STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_CNP_H_4, MEI_ME_PCH8_CFG)}, 107f8f4aa68SAlexander Usyskin 1082703d4b2STomas Winkler /* required last entry */ 1092703d4b2STomas Winkler {0, } 1102703d4b2STomas Winkler }; 1112703d4b2STomas Winkler 112b68301e9STomas Winkler MODULE_DEVICE_TABLE(pci, mei_me_pci_tbl); 1132703d4b2STomas Winkler 114bbd6d050SRafael J. Wysocki #ifdef CONFIG_PM 115e13fa90cSTomas Winkler static inline void mei_me_set_pm_domain(struct mei_device *dev); 116e13fa90cSTomas Winkler static inline void mei_me_unset_pm_domain(struct mei_device *dev); 117e13fa90cSTomas Winkler #else 118e13fa90cSTomas Winkler static inline void mei_me_set_pm_domain(struct mei_device *dev) {} 119e13fa90cSTomas Winkler static inline void mei_me_unset_pm_domain(struct mei_device *dev) {} 120bbd6d050SRafael J. Wysocki #endif /* CONFIG_PM */ 121e13fa90cSTomas Winkler 1222703d4b2STomas Winkler /** 123ce23139cSAlexander Usyskin * mei_me_quirk_probe - probe for devices that doesn't valid ME interface 124393b148fSMasanari Iida * 1252703d4b2STomas Winkler * @pdev: PCI device structure 126c919951dSTomas Winkler * @cfg: per generation config 1272703d4b2STomas Winkler * 128a8605ea2SAlexander Usyskin * Return: true if ME Interface is valid, false otherwise 1292703d4b2STomas Winkler */ 130b68301e9STomas Winkler static bool mei_me_quirk_probe(struct pci_dev *pdev, 131c919951dSTomas Winkler const struct mei_cfg *cfg) 1322703d4b2STomas Winkler { 133c919951dSTomas Winkler if (cfg->quirk_probe && cfg->quirk_probe(pdev)) { 1342703d4b2STomas Winkler dev_info(&pdev->dev, "Device doesn't have valid ME Interface\n"); 1352703d4b2STomas Winkler return false; 1362703d4b2STomas Winkler } 137c919951dSTomas Winkler 138c919951dSTomas Winkler return true; 139c919951dSTomas Winkler } 140c919951dSTomas Winkler 1412703d4b2STomas Winkler /** 142ce23139cSAlexander Usyskin * mei_me_probe - Device Initialization Routine 1432703d4b2STomas Winkler * 1442703d4b2STomas Winkler * @pdev: PCI device structure 1452703d4b2STomas Winkler * @ent: entry in kcs_pci_tbl 1462703d4b2STomas Winkler * 147a8605ea2SAlexander Usyskin * Return: 0 on success, <0 on failure. 1482703d4b2STomas Winkler */ 149b68301e9STomas Winkler static int mei_me_probe(struct pci_dev *pdev, const struct pci_device_id *ent) 1502703d4b2STomas Winkler { 151f5ac3c49STomas Winkler const struct mei_cfg *cfg; 1522703d4b2STomas Winkler struct mei_device *dev; 15352c34561STomas Winkler struct mei_me_hw *hw; 1541fa55b4eSAlexander Usyskin unsigned int irqflags; 1552703d4b2STomas Winkler int err; 1562703d4b2STomas Winkler 157f5ac3c49STomas Winkler cfg = mei_me_get_cfg(ent->driver_data); 158f5ac3c49STomas Winkler if (!cfg) 159f5ac3c49STomas Winkler return -ENODEV; 1602703d4b2STomas Winkler 161c919951dSTomas Winkler if (!mei_me_quirk_probe(pdev, cfg)) 162c919951dSTomas Winkler return -ENODEV; 1632703d4b2STomas Winkler 1642703d4b2STomas Winkler /* enable pci dev */ 165f8a09605STomas Winkler err = pcim_enable_device(pdev); 1662703d4b2STomas Winkler if (err) { 1672703d4b2STomas Winkler dev_err(&pdev->dev, "failed to enable pci device.\n"); 1682703d4b2STomas Winkler goto end; 1692703d4b2STomas Winkler } 1702703d4b2STomas Winkler /* set PCI host mastering */ 1712703d4b2STomas Winkler pci_set_master(pdev); 172f8a09605STomas Winkler /* pci request regions and mapping IO device memory for mei driver */ 173f8a09605STomas Winkler err = pcim_iomap_regions(pdev, BIT(0), KBUILD_MODNAME); 1742703d4b2STomas Winkler if (err) { 1752703d4b2STomas Winkler dev_err(&pdev->dev, "failed to get pci regions.\n"); 176f8a09605STomas Winkler goto end; 1772703d4b2STomas Winkler } 1783ecfb168STomas Winkler 1793ecfb168STomas Winkler if (dma_set_mask(&pdev->dev, DMA_BIT_MASK(64)) || 1803ecfb168STomas Winkler dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64))) { 1813ecfb168STomas Winkler 1823ecfb168STomas Winkler err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32)); 1833ecfb168STomas Winkler if (err) 1843ecfb168STomas Winkler err = dma_set_coherent_mask(&pdev->dev, 1853ecfb168STomas Winkler DMA_BIT_MASK(32)); 1863ecfb168STomas Winkler } 1873ecfb168STomas Winkler if (err) { 1883ecfb168STomas Winkler dev_err(&pdev->dev, "No usable DMA configuration, aborting\n"); 189f8a09605STomas Winkler goto end; 1903ecfb168STomas Winkler } 1913ecfb168STomas Winkler 1922703d4b2STomas Winkler /* allocates and initializes the mei dev structure */ 1938d929d48SAlexander Usyskin dev = mei_me_dev_init(pdev, cfg); 1942703d4b2STomas Winkler if (!dev) { 1952703d4b2STomas Winkler err = -ENOMEM; 196f8a09605STomas Winkler goto end; 1972703d4b2STomas Winkler } 19852c34561STomas Winkler hw = to_me_hw(dev); 199f8a09605STomas Winkler hw->mem_addr = pcim_iomap_table(pdev)[0]; 200f8a09605STomas Winkler 2012703d4b2STomas Winkler pci_enable_msi(pdev); 2022703d4b2STomas Winkler 2032703d4b2STomas Winkler /* request and enable interrupt */ 2041fa55b4eSAlexander Usyskin irqflags = pci_dev_msi_enabled(pdev) ? IRQF_ONESHOT : IRQF_SHARED; 2051fa55b4eSAlexander Usyskin 2062703d4b2STomas Winkler err = request_threaded_irq(pdev->irq, 20706ecd645STomas Winkler mei_me_irq_quick_handler, 20806ecd645STomas Winkler mei_me_irq_thread_handler, 2091fa55b4eSAlexander Usyskin irqflags, KBUILD_MODNAME, dev); 2102703d4b2STomas Winkler if (err) { 2112703d4b2STomas Winkler dev_err(&pdev->dev, "request_threaded_irq failure. irq = %d\n", 2122703d4b2STomas Winkler pdev->irq); 213f8a09605STomas Winkler goto end; 2142703d4b2STomas Winkler } 2152703d4b2STomas Winkler 216c4d589beSTomas Winkler if (mei_start(dev)) { 2172703d4b2STomas Winkler dev_err(&pdev->dev, "init hw failure.\n"); 2182703d4b2STomas Winkler err = -ENODEV; 2192703d4b2STomas Winkler goto release_irq; 2202703d4b2STomas Winkler } 2212703d4b2STomas Winkler 222180ea05bSTomas Winkler pm_runtime_set_autosuspend_delay(&pdev->dev, MEI_ME_RPM_TIMEOUT); 223180ea05bSTomas Winkler pm_runtime_use_autosuspend(&pdev->dev); 224180ea05bSTomas Winkler 225f3d8e878SAlexander Usyskin err = mei_register(dev, &pdev->dev); 2262703d4b2STomas Winkler if (err) 2271f7e489aSAlexander Usyskin goto stop; 2282703d4b2STomas Winkler 2292703d4b2STomas Winkler pci_set_drvdata(pdev, dev); 2302703d4b2STomas Winkler 231e13fa90cSTomas Winkler /* 232557909e1SAlexander Usyskin * MEI requires to resume from runtime suspend mode 233557909e1SAlexander Usyskin * in order to perform link reset flow upon system suspend. 234557909e1SAlexander Usyskin */ 235c2eac4d3SRafael J. Wysocki dev_pm_set_driver_flags(&pdev->dev, DPM_FLAG_NEVER_SKIP); 236557909e1SAlexander Usyskin 237557909e1SAlexander Usyskin /* 238b42dc063SAlexander Usyskin * ME maps runtime suspend/resume to D0i states, 239b42dc063SAlexander Usyskin * hence we need to go around native PCI runtime service which 240b42dc063SAlexander Usyskin * eventually brings the device into D3cold/hot state, 241b42dc063SAlexander Usyskin * but the mei device cannot wake up from D3 unlike from D0i3. 242b42dc063SAlexander Usyskin * To get around the PCI device native runtime pm, 243b42dc063SAlexander Usyskin * ME uses runtime pm domain handlers which take precedence 244b42dc063SAlexander Usyskin * over the driver's pm handlers. 245e13fa90cSTomas Winkler */ 246e13fa90cSTomas Winkler mei_me_set_pm_domain(dev); 247e13fa90cSTomas Winkler 248cc365dcfSTomas Winkler if (mei_pg_is_enabled(dev)) { 249180ea05bSTomas Winkler pm_runtime_put_noidle(&pdev->dev); 250cc365dcfSTomas Winkler if (hw->d0i3_supported) 251cc365dcfSTomas Winkler pm_runtime_allow(&pdev->dev); 252cc365dcfSTomas Winkler } 253180ea05bSTomas Winkler 254c4e87b52SAlexander Usyskin dev_dbg(&pdev->dev, "initialization successful.\n"); 2552703d4b2STomas Winkler 2562703d4b2STomas Winkler return 0; 2572703d4b2STomas Winkler 2581f7e489aSAlexander Usyskin stop: 2591f7e489aSAlexander Usyskin mei_stop(dev); 2602703d4b2STomas Winkler release_irq: 261dc844b0dSTomas Winkler mei_cancel_work(dev); 2622703d4b2STomas Winkler mei_disable_interrupts(dev); 2632703d4b2STomas Winkler free_irq(pdev->irq, dev); 2642703d4b2STomas Winkler end: 2652703d4b2STomas Winkler dev_err(&pdev->dev, "initialization failed.\n"); 2662703d4b2STomas Winkler return err; 2672703d4b2STomas Winkler } 2682703d4b2STomas Winkler 2692703d4b2STomas Winkler /** 2705c4c0106STomas Winkler * mei_me_shutdown - Device Removal Routine 2715c4c0106STomas Winkler * 2725c4c0106STomas Winkler * @pdev: PCI device structure 2735c4c0106STomas Winkler * 2745c4c0106STomas Winkler * mei_me_shutdown is called from the reboot notifier 2755c4c0106STomas Winkler * it's a simplified version of remove so we go down 2765c4c0106STomas Winkler * faster. 2775c4c0106STomas Winkler */ 2785c4c0106STomas Winkler static void mei_me_shutdown(struct pci_dev *pdev) 2795c4c0106STomas Winkler { 2805c4c0106STomas Winkler struct mei_device *dev; 2815c4c0106STomas Winkler 2825c4c0106STomas Winkler dev = pci_get_drvdata(pdev); 2835c4c0106STomas Winkler if (!dev) 2845c4c0106STomas Winkler return; 2855c4c0106STomas Winkler 2865c4c0106STomas Winkler dev_dbg(&pdev->dev, "shutdown\n"); 2875c4c0106STomas Winkler mei_stop(dev); 2885c4c0106STomas Winkler 2895c4c0106STomas Winkler mei_me_unset_pm_domain(dev); 2905c4c0106STomas Winkler 2915c4c0106STomas Winkler mei_disable_interrupts(dev); 2925c4c0106STomas Winkler free_irq(pdev->irq, dev); 2935c4c0106STomas Winkler } 2945c4c0106STomas Winkler 2955c4c0106STomas Winkler /** 296ce23139cSAlexander Usyskin * mei_me_remove - Device Removal Routine 2972703d4b2STomas Winkler * 2982703d4b2STomas Winkler * @pdev: PCI device structure 2992703d4b2STomas Winkler * 3005c4c0106STomas Winkler * mei_me_remove is called by the PCI subsystem to alert the driver 3012703d4b2STomas Winkler * that it should release a PCI device. 3022703d4b2STomas Winkler */ 303b68301e9STomas Winkler static void mei_me_remove(struct pci_dev *pdev) 3042703d4b2STomas Winkler { 3052703d4b2STomas Winkler struct mei_device *dev; 3062703d4b2STomas Winkler 3072703d4b2STomas Winkler dev = pci_get_drvdata(pdev); 3082703d4b2STomas Winkler if (!dev) 3092703d4b2STomas Winkler return; 3102703d4b2STomas Winkler 311180ea05bSTomas Winkler if (mei_pg_is_enabled(dev)) 312180ea05bSTomas Winkler pm_runtime_get_noresume(&pdev->dev); 313180ea05bSTomas Winkler 314ed6f7ac1SPaul Bolle dev_dbg(&pdev->dev, "stop\n"); 3157cb035d9STomas Winkler mei_stop(dev); 3162703d4b2STomas Winkler 317e13fa90cSTomas Winkler mei_me_unset_pm_domain(dev); 318e13fa90cSTomas Winkler 3192703d4b2STomas Winkler mei_disable_interrupts(dev); 3202703d4b2STomas Winkler 3212703d4b2STomas Winkler free_irq(pdev->irq, dev); 3222703d4b2STomas Winkler 32330e53bb8STomas Winkler mei_deregister(dev); 3242703d4b2STomas Winkler } 325f8a09605STomas Winkler 32616833257SAlexander Usyskin #ifdef CONFIG_PM_SLEEP 327b68301e9STomas Winkler static int mei_me_pci_suspend(struct device *device) 3282703d4b2STomas Winkler { 3292703d4b2STomas Winkler struct pci_dev *pdev = to_pci_dev(device); 3302703d4b2STomas Winkler struct mei_device *dev = pci_get_drvdata(pdev); 3312703d4b2STomas Winkler 3322703d4b2STomas Winkler if (!dev) 3332703d4b2STomas Winkler return -ENODEV; 3342703d4b2STomas Winkler 335ed6f7ac1SPaul Bolle dev_dbg(&pdev->dev, "suspend\n"); 3362703d4b2STomas Winkler 3377cb035d9STomas Winkler mei_stop(dev); 3387cb035d9STomas Winkler 3397cb035d9STomas Winkler mei_disable_interrupts(dev); 3402703d4b2STomas Winkler 3412703d4b2STomas Winkler free_irq(pdev->irq, dev); 3422703d4b2STomas Winkler pci_disable_msi(pdev); 3432703d4b2STomas Winkler 3447cb035d9STomas Winkler return 0; 3452703d4b2STomas Winkler } 3462703d4b2STomas Winkler 347b68301e9STomas Winkler static int mei_me_pci_resume(struct device *device) 3482703d4b2STomas Winkler { 3492703d4b2STomas Winkler struct pci_dev *pdev = to_pci_dev(device); 3502703d4b2STomas Winkler struct mei_device *dev; 3511fa55b4eSAlexander Usyskin unsigned int irqflags; 3522703d4b2STomas Winkler int err; 3532703d4b2STomas Winkler 3542703d4b2STomas Winkler dev = pci_get_drvdata(pdev); 3552703d4b2STomas Winkler if (!dev) 3562703d4b2STomas Winkler return -ENODEV; 3572703d4b2STomas Winkler 3582703d4b2STomas Winkler pci_enable_msi(pdev); 3592703d4b2STomas Winkler 3601fa55b4eSAlexander Usyskin irqflags = pci_dev_msi_enabled(pdev) ? IRQF_ONESHOT : IRQF_SHARED; 3611fa55b4eSAlexander Usyskin 3622703d4b2STomas Winkler /* request and enable interrupt */ 3632703d4b2STomas Winkler err = request_threaded_irq(pdev->irq, 36406ecd645STomas Winkler mei_me_irq_quick_handler, 36506ecd645STomas Winkler mei_me_irq_thread_handler, 3661fa55b4eSAlexander Usyskin irqflags, KBUILD_MODNAME, dev); 3672703d4b2STomas Winkler 3682703d4b2STomas Winkler if (err) { 3692703d4b2STomas Winkler dev_err(&pdev->dev, "request_threaded_irq failed: irq = %d.\n", 3702703d4b2STomas Winkler pdev->irq); 3712703d4b2STomas Winkler return err; 3722703d4b2STomas Winkler } 3732703d4b2STomas Winkler 37433ec0826STomas Winkler err = mei_restart(dev); 37533ec0826STomas Winkler if (err) 37633ec0826STomas Winkler return err; 3772703d4b2STomas Winkler 3782703d4b2STomas Winkler /* Start timer if stopped in suspend */ 3792703d4b2STomas Winkler schedule_delayed_work(&dev->timer_work, HZ); 3802703d4b2STomas Winkler 38133ec0826STomas Winkler return 0; 3822703d4b2STomas Winkler } 383180ea05bSTomas Winkler #endif /* CONFIG_PM_SLEEP */ 38416833257SAlexander Usyskin 385bbd6d050SRafael J. Wysocki #ifdef CONFIG_PM 386180ea05bSTomas Winkler static int mei_me_pm_runtime_idle(struct device *device) 387180ea05bSTomas Winkler { 388180ea05bSTomas Winkler struct pci_dev *pdev = to_pci_dev(device); 389180ea05bSTomas Winkler struct mei_device *dev; 390180ea05bSTomas Winkler 391180ea05bSTomas Winkler dev_dbg(&pdev->dev, "rpm: me: runtime_idle\n"); 392180ea05bSTomas Winkler 393180ea05bSTomas Winkler dev = pci_get_drvdata(pdev); 394180ea05bSTomas Winkler if (!dev) 395180ea05bSTomas Winkler return -ENODEV; 396180ea05bSTomas Winkler if (mei_write_is_idle(dev)) 397d5d83f8aSAlexander Usyskin pm_runtime_autosuspend(device); 398180ea05bSTomas Winkler 399180ea05bSTomas Winkler return -EBUSY; 400180ea05bSTomas Winkler } 401180ea05bSTomas Winkler 402180ea05bSTomas Winkler static int mei_me_pm_runtime_suspend(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 suspend\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 if (mei_write_is_idle(dev)) 4172d1995fcSAlexander Usyskin ret = mei_me_pg_enter_sync(dev); 418180ea05bSTomas Winkler else 419180ea05bSTomas Winkler ret = -EAGAIN; 420180ea05bSTomas Winkler 421180ea05bSTomas Winkler mutex_unlock(&dev->device_lock); 422180ea05bSTomas Winkler 423180ea05bSTomas Winkler dev_dbg(&pdev->dev, "rpm: me: runtime suspend ret=%d\n", ret); 424180ea05bSTomas Winkler 42577537ad2SAlexander Usyskin if (ret && ret != -EAGAIN) 42677537ad2SAlexander Usyskin schedule_work(&dev->reset_work); 42777537ad2SAlexander Usyskin 428180ea05bSTomas Winkler return ret; 429180ea05bSTomas Winkler } 430180ea05bSTomas Winkler 431180ea05bSTomas Winkler static int mei_me_pm_runtime_resume(struct device *device) 432180ea05bSTomas Winkler { 433180ea05bSTomas Winkler struct pci_dev *pdev = to_pci_dev(device); 434180ea05bSTomas Winkler struct mei_device *dev; 435180ea05bSTomas Winkler int ret; 436180ea05bSTomas Winkler 437180ea05bSTomas Winkler dev_dbg(&pdev->dev, "rpm: me: runtime resume\n"); 438180ea05bSTomas Winkler 439180ea05bSTomas Winkler dev = pci_get_drvdata(pdev); 440180ea05bSTomas Winkler if (!dev) 441180ea05bSTomas Winkler return -ENODEV; 442180ea05bSTomas Winkler 443180ea05bSTomas Winkler mutex_lock(&dev->device_lock); 444180ea05bSTomas Winkler 4452d1995fcSAlexander Usyskin ret = mei_me_pg_exit_sync(dev); 446180ea05bSTomas Winkler 447180ea05bSTomas Winkler mutex_unlock(&dev->device_lock); 448180ea05bSTomas Winkler 449180ea05bSTomas Winkler dev_dbg(&pdev->dev, "rpm: me: runtime resume ret = %d\n", ret); 450180ea05bSTomas Winkler 45177537ad2SAlexander Usyskin if (ret) 45277537ad2SAlexander Usyskin schedule_work(&dev->reset_work); 45377537ad2SAlexander Usyskin 454180ea05bSTomas Winkler return ret; 455180ea05bSTomas Winkler } 456e13fa90cSTomas Winkler 457e13fa90cSTomas Winkler /** 4587efceb55SGeert Uytterhoeven * mei_me_set_pm_domain - fill and set pm domain structure for device 459e13fa90cSTomas Winkler * 460e13fa90cSTomas Winkler * @dev: mei_device 461e13fa90cSTomas Winkler */ 462e13fa90cSTomas Winkler static inline void mei_me_set_pm_domain(struct mei_device *dev) 463e13fa90cSTomas Winkler { 464d08b8fc0STomas Winkler struct pci_dev *pdev = to_pci_dev(dev->dev); 465e13fa90cSTomas Winkler 466e13fa90cSTomas Winkler if (pdev->dev.bus && pdev->dev.bus->pm) { 467e13fa90cSTomas Winkler dev->pg_domain.ops = *pdev->dev.bus->pm; 468e13fa90cSTomas Winkler 469e13fa90cSTomas Winkler dev->pg_domain.ops.runtime_suspend = mei_me_pm_runtime_suspend; 470e13fa90cSTomas Winkler dev->pg_domain.ops.runtime_resume = mei_me_pm_runtime_resume; 471e13fa90cSTomas Winkler dev->pg_domain.ops.runtime_idle = mei_me_pm_runtime_idle; 472e13fa90cSTomas Winkler 473989561deSTomeu Vizoso dev_pm_domain_set(&pdev->dev, &dev->pg_domain); 474e13fa90cSTomas Winkler } 475e13fa90cSTomas Winkler } 476e13fa90cSTomas Winkler 477e13fa90cSTomas Winkler /** 4787efceb55SGeert Uytterhoeven * mei_me_unset_pm_domain - clean pm domain structure for device 479e13fa90cSTomas Winkler * 480e13fa90cSTomas Winkler * @dev: mei_device 481e13fa90cSTomas Winkler */ 482e13fa90cSTomas Winkler static inline void mei_me_unset_pm_domain(struct mei_device *dev) 483e13fa90cSTomas Winkler { 484e13fa90cSTomas Winkler /* stop using pm callbacks if any */ 485989561deSTomeu Vizoso dev_pm_domain_set(dev->dev, NULL); 486e13fa90cSTomas Winkler } 487180ea05bSTomas Winkler 488180ea05bSTomas Winkler static const struct dev_pm_ops mei_me_pm_ops = { 489180ea05bSTomas Winkler SET_SYSTEM_SLEEP_PM_OPS(mei_me_pci_suspend, 490180ea05bSTomas Winkler mei_me_pci_resume) 491180ea05bSTomas Winkler SET_RUNTIME_PM_OPS( 492180ea05bSTomas Winkler mei_me_pm_runtime_suspend, 493180ea05bSTomas Winkler mei_me_pm_runtime_resume, 494180ea05bSTomas Winkler mei_me_pm_runtime_idle) 495180ea05bSTomas Winkler }; 496180ea05bSTomas Winkler 497b68301e9STomas Winkler #define MEI_ME_PM_OPS (&mei_me_pm_ops) 4982703d4b2STomas Winkler #else 499b68301e9STomas Winkler #define MEI_ME_PM_OPS NULL 500180ea05bSTomas Winkler #endif /* CONFIG_PM */ 5012703d4b2STomas Winkler /* 5022703d4b2STomas Winkler * PCI driver structure 5032703d4b2STomas Winkler */ 504b68301e9STomas Winkler static struct pci_driver mei_me_driver = { 5052703d4b2STomas Winkler .name = KBUILD_MODNAME, 506b68301e9STomas Winkler .id_table = mei_me_pci_tbl, 507b68301e9STomas Winkler .probe = mei_me_probe, 508b68301e9STomas Winkler .remove = mei_me_remove, 5095c4c0106STomas Winkler .shutdown = mei_me_shutdown, 510b68301e9STomas Winkler .driver.pm = MEI_ME_PM_OPS, 51167de6bf1SAlexander Usyskin .driver.probe_type = PROBE_PREFER_ASYNCHRONOUS, 5122703d4b2STomas Winkler }; 5132703d4b2STomas Winkler 514b68301e9STomas Winkler module_pci_driver(mei_me_driver); 5152703d4b2STomas Winkler 5162703d4b2STomas Winkler MODULE_AUTHOR("Intel Corporation"); 5172703d4b2STomas Winkler MODULE_DESCRIPTION("Intel(R) Management Engine Interface"); 5182703d4b2STomas Winkler MODULE_LICENSE("GPL v2"); 519