19fff0425STomas Winkler // SPDX-License-Identifier: GPL-2.0 22703d4b2STomas Winkler /* 31e55b609STomas Winkler * Copyright (c) 2003-2019, Intel Corporation. All rights reserved. 42703d4b2STomas Winkler * Intel Management Engine Interface (Intel MEI) Linux driver 52703d4b2STomas Winkler */ 69fff0425STomas Winkler 72703d4b2STomas Winkler #include <linux/module.h> 82703d4b2STomas Winkler #include <linux/moduleparam.h> 92703d4b2STomas Winkler #include <linux/kernel.h> 102703d4b2STomas Winkler #include <linux/device.h> 112703d4b2STomas Winkler #include <linux/fs.h> 122703d4b2STomas Winkler #include <linux/errno.h> 132703d4b2STomas Winkler #include <linux/types.h> 142703d4b2STomas Winkler #include <linux/fcntl.h> 152703d4b2STomas Winkler #include <linux/pci.h> 162703d4b2STomas Winkler #include <linux/poll.h> 172703d4b2STomas Winkler #include <linux/ioctl.h> 182703d4b2STomas Winkler #include <linux/cdev.h> 192703d4b2STomas Winkler #include <linux/sched.h> 202703d4b2STomas Winkler #include <linux/uuid.h> 212703d4b2STomas Winkler #include <linux/compat.h> 222703d4b2STomas Winkler #include <linux/jiffies.h> 232703d4b2STomas Winkler #include <linux/interrupt.h> 242703d4b2STomas Winkler 25989561deSTomeu Vizoso #include <linux/pm_domain.h> 26180ea05bSTomas Winkler #include <linux/pm_runtime.h> 27180ea05bSTomas Winkler 282703d4b2STomas Winkler #include <linux/mei.h> 292703d4b2STomas Winkler 302703d4b2STomas Winkler #include "mei_dev.h" 312703d4b2STomas Winkler #include "client.h" 326e4cd27aSTomas Winkler #include "hw-me-regs.h" 336e4cd27aSTomas Winkler #include "hw-me.h" 342703d4b2STomas Winkler 352703d4b2STomas Winkler /* mei_pci_tbl - PCI Device ID Table */ 36a05f8f86STomas Winkler static const struct pci_device_id mei_me_pci_tbl[] = { 37f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_82946GZ, MEI_ME_ICH_CFG)}, 38f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_82G35, MEI_ME_ICH_CFG)}, 39f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_82Q965, MEI_ME_ICH_CFG)}, 40f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_82G965, MEI_ME_ICH_CFG)}, 41f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_82GM965, MEI_ME_ICH_CFG)}, 42f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_82GME965, MEI_ME_ICH_CFG)}, 43f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_ICH9_82Q35, MEI_ME_ICH_CFG)}, 44f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_ICH9_82G33, MEI_ME_ICH_CFG)}, 45f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_ICH9_82Q33, MEI_ME_ICH_CFG)}, 46f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_ICH9_82X38, MEI_ME_ICH_CFG)}, 47f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_ICH9_3200, MEI_ME_ICH_CFG)}, 488d929d48SAlexander Usyskin 49f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_ICH9_6, MEI_ME_ICH_CFG)}, 50f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_ICH9_7, MEI_ME_ICH_CFG)}, 51f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_ICH9_8, MEI_ME_ICH_CFG)}, 52f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_ICH9_9, MEI_ME_ICH_CFG)}, 53f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_ICH9_10, MEI_ME_ICH_CFG)}, 54f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_ICH9M_1, MEI_ME_ICH_CFG)}, 55f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_ICH9M_2, MEI_ME_ICH_CFG)}, 56f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_ICH9M_3, MEI_ME_ICH_CFG)}, 57f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_ICH9M_4, MEI_ME_ICH_CFG)}, 588d929d48SAlexander Usyskin 59f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_ICH10_1, MEI_ME_ICH10_CFG)}, 60f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_ICH10_2, MEI_ME_ICH10_CFG)}, 61f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_ICH10_3, MEI_ME_ICH10_CFG)}, 62f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_ICH10_4, MEI_ME_ICH10_CFG)}, 632703d4b2STomas Winkler 64f8204f0dSAlexander Usyskin {MEI_PCI_DEVICE(MEI_DEV_ID_IBXPK_1, MEI_ME_PCH6_CFG)}, 65f8204f0dSAlexander Usyskin {MEI_PCI_DEVICE(MEI_DEV_ID_IBXPK_2, MEI_ME_PCH6_CFG)}, 66f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_CPT_1, MEI_ME_PCH_CPT_PBG_CFG)}, 67f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_PBG_1, MEI_ME_PCH_CPT_PBG_CFG)}, 68f8204f0dSAlexander Usyskin {MEI_PCI_DEVICE(MEI_DEV_ID_PPT_1, MEI_ME_PCH7_CFG)}, 69f8204f0dSAlexander Usyskin {MEI_PCI_DEVICE(MEI_DEV_ID_PPT_2, MEI_ME_PCH7_CFG)}, 70f8204f0dSAlexander Usyskin {MEI_PCI_DEVICE(MEI_DEV_ID_PPT_3, MEI_ME_PCH7_CFG)}, 71f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_LPT_H, MEI_ME_PCH8_SPS_CFG)}, 72f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_LPT_W, MEI_ME_PCH8_SPS_CFG)}, 73f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_LPT_LP, MEI_ME_PCH8_CFG)}, 74f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_LPT_HR, MEI_ME_PCH8_SPS_CFG)}, 75f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_WPT_LP, MEI_ME_PCH8_CFG)}, 76f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_WPT_LP_2, MEI_ME_PCH8_CFG)}, 771625c7ecSTomas Winkler 78f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_SPT, MEI_ME_PCH8_CFG)}, 79f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_SPT_2, MEI_ME_PCH8_CFG)}, 80f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_SPT_H, MEI_ME_PCH8_SPS_CFG)}, 81f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_SPT_H_2, MEI_ME_PCH8_SPS_CFG)}, 82173436baSAlexander Usyskin {MEI_PCI_DEVICE(MEI_DEV_ID_LBG, MEI_ME_PCH12_CFG)}, 83dd16f6cdSTomas Winkler 84f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_BXT_M, MEI_ME_PCH8_CFG)}, 85f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_APL_I, MEI_ME_PCH8_CFG)}, 86f5ac3c49STomas Winkler 87f7ee8eadSTomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_DNV_IE, MEI_ME_PCH8_CFG)}, 88f7ee8eadSTomas Winkler 89688cb678STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_GLK, MEI_ME_PCH8_CFG)}, 90688cb678STomas Winkler 91f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_KBP, MEI_ME_PCH8_CFG)}, 92f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_KBP_2, MEI_ME_PCH8_CFG)}, 93ac182e8aSAlexander Usyskin 941dbfe7f2SAlexander Usyskin {MEI_PCI_DEVICE(MEI_DEV_ID_CNP_LP, MEI_ME_PCH12_CFG)}, 952a4ac172STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_CNP_LP_4, MEI_ME_PCH8_CFG)}, 961dbfe7f2SAlexander Usyskin {MEI_PCI_DEVICE(MEI_DEV_ID_CNP_H, MEI_ME_PCH12_CFG)}, 972a4ac172STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_CNP_H_4, MEI_ME_PCH8_CFG)}, 98f8f4aa68SAlexander Usyskin 994d86dfd3STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_CMP_LP, MEI_ME_PCH12_CFG)}, 1004d86dfd3STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_CMP_LP_3, MEI_ME_PCH8_CFG)}, 1014d86dfd3STomas Winkler 102efe814e9STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_ICP_LP, MEI_ME_PCH12_CFG)}, 103efe814e9STomas Winkler 104587f1740STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_TGP_LP, MEI_ME_PCH12_CFG)}, 105587f1740STomas Winkler 1061be8624aSAlexander Usyskin {MEI_PCI_DEVICE(MEI_DEV_ID_MCC, MEI_ME_PCH12_CFG)}, 1071be8624aSAlexander Usyskin {MEI_PCI_DEVICE(MEI_DEV_ID_MCC_4, MEI_ME_PCH8_CFG)}, 1081be8624aSAlexander Usyskin 1092703d4b2STomas Winkler /* required last entry */ 1102703d4b2STomas Winkler {0, } 1112703d4b2STomas Winkler }; 1122703d4b2STomas Winkler 113b68301e9STomas Winkler MODULE_DEVICE_TABLE(pci, mei_me_pci_tbl); 1142703d4b2STomas Winkler 115bbd6d050SRafael J. Wysocki #ifdef CONFIG_PM 116e13fa90cSTomas Winkler static inline void mei_me_set_pm_domain(struct mei_device *dev); 117e13fa90cSTomas Winkler static inline void mei_me_unset_pm_domain(struct mei_device *dev); 118e13fa90cSTomas Winkler #else 119e13fa90cSTomas Winkler static inline void mei_me_set_pm_domain(struct mei_device *dev) {} 120e13fa90cSTomas Winkler static inline void mei_me_unset_pm_domain(struct mei_device *dev) {} 121bbd6d050SRafael J. Wysocki #endif /* CONFIG_PM */ 122e13fa90cSTomas Winkler 1232703d4b2STomas Winkler /** 124ce23139cSAlexander Usyskin * mei_me_quirk_probe - probe for devices that doesn't valid ME interface 125393b148fSMasanari Iida * 1262703d4b2STomas Winkler * @pdev: PCI device structure 127c919951dSTomas Winkler * @cfg: per generation config 1282703d4b2STomas Winkler * 129a8605ea2SAlexander Usyskin * Return: true if ME Interface is valid, false otherwise 1302703d4b2STomas Winkler */ 131b68301e9STomas Winkler static bool mei_me_quirk_probe(struct pci_dev *pdev, 132c919951dSTomas Winkler const struct mei_cfg *cfg) 1332703d4b2STomas Winkler { 134c919951dSTomas Winkler if (cfg->quirk_probe && cfg->quirk_probe(pdev)) { 1352703d4b2STomas Winkler dev_info(&pdev->dev, "Device doesn't have valid ME Interface\n"); 1362703d4b2STomas Winkler return false; 1372703d4b2STomas Winkler } 138c919951dSTomas Winkler 139c919951dSTomas Winkler return true; 140c919951dSTomas Winkler } 141c919951dSTomas Winkler 1422703d4b2STomas Winkler /** 143ce23139cSAlexander Usyskin * mei_me_probe - Device Initialization Routine 1442703d4b2STomas Winkler * 1452703d4b2STomas Winkler * @pdev: PCI device structure 1462703d4b2STomas Winkler * @ent: entry in kcs_pci_tbl 1472703d4b2STomas Winkler * 148a8605ea2SAlexander Usyskin * Return: 0 on success, <0 on failure. 1492703d4b2STomas Winkler */ 150b68301e9STomas Winkler static int mei_me_probe(struct pci_dev *pdev, const struct pci_device_id *ent) 1512703d4b2STomas Winkler { 152f5ac3c49STomas Winkler const struct mei_cfg *cfg; 1532703d4b2STomas Winkler struct mei_device *dev; 15452c34561STomas Winkler struct mei_me_hw *hw; 1551fa55b4eSAlexander Usyskin unsigned int irqflags; 1562703d4b2STomas Winkler int err; 1572703d4b2STomas Winkler 158f5ac3c49STomas Winkler cfg = mei_me_get_cfg(ent->driver_data); 159f5ac3c49STomas Winkler if (!cfg) 160f5ac3c49STomas Winkler return -ENODEV; 1612703d4b2STomas Winkler 162c919951dSTomas Winkler if (!mei_me_quirk_probe(pdev, cfg)) 163c919951dSTomas Winkler return -ENODEV; 1642703d4b2STomas Winkler 1652703d4b2STomas Winkler /* enable pci dev */ 166f8a09605STomas Winkler err = pcim_enable_device(pdev); 1672703d4b2STomas Winkler if (err) { 1682703d4b2STomas Winkler dev_err(&pdev->dev, "failed to enable pci device.\n"); 1692703d4b2STomas Winkler goto end; 1702703d4b2STomas Winkler } 1712703d4b2STomas Winkler /* set PCI host mastering */ 1722703d4b2STomas Winkler pci_set_master(pdev); 173f8a09605STomas Winkler /* pci request regions and mapping IO device memory for mei driver */ 174f8a09605STomas Winkler err = pcim_iomap_regions(pdev, BIT(0), KBUILD_MODNAME); 1752703d4b2STomas Winkler if (err) { 1762703d4b2STomas Winkler dev_err(&pdev->dev, "failed to get pci regions.\n"); 177f8a09605STomas Winkler goto end; 1782703d4b2STomas Winkler } 1793ecfb168STomas Winkler 1803ecfb168STomas Winkler if (dma_set_mask(&pdev->dev, DMA_BIT_MASK(64)) || 1813ecfb168STomas Winkler dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64))) { 1823ecfb168STomas Winkler 1833ecfb168STomas Winkler err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32)); 1843ecfb168STomas Winkler if (err) 1853ecfb168STomas Winkler err = dma_set_coherent_mask(&pdev->dev, 1863ecfb168STomas Winkler DMA_BIT_MASK(32)); 1873ecfb168STomas Winkler } 1883ecfb168STomas Winkler if (err) { 1893ecfb168STomas Winkler dev_err(&pdev->dev, "No usable DMA configuration, aborting\n"); 190f8a09605STomas Winkler goto end; 1913ecfb168STomas Winkler } 1923ecfb168STomas Winkler 1932703d4b2STomas Winkler /* allocates and initializes the mei dev structure */ 1948d929d48SAlexander Usyskin dev = mei_me_dev_init(pdev, cfg); 1952703d4b2STomas Winkler if (!dev) { 1962703d4b2STomas Winkler err = -ENOMEM; 197f8a09605STomas Winkler goto end; 1982703d4b2STomas Winkler } 19952c34561STomas Winkler hw = to_me_hw(dev); 200f8a09605STomas Winkler hw->mem_addr = pcim_iomap_table(pdev)[0]; 201f8a09605STomas Winkler 2022703d4b2STomas Winkler pci_enable_msi(pdev); 2032703d4b2STomas Winkler 2042703d4b2STomas Winkler /* request and enable interrupt */ 2051fa55b4eSAlexander Usyskin irqflags = pci_dev_msi_enabled(pdev) ? IRQF_ONESHOT : IRQF_SHARED; 2061fa55b4eSAlexander Usyskin 2072703d4b2STomas Winkler err = request_threaded_irq(pdev->irq, 20806ecd645STomas Winkler mei_me_irq_quick_handler, 20906ecd645STomas Winkler mei_me_irq_thread_handler, 2101fa55b4eSAlexander Usyskin irqflags, KBUILD_MODNAME, dev); 2112703d4b2STomas Winkler if (err) { 2122703d4b2STomas Winkler dev_err(&pdev->dev, "request_threaded_irq failure. irq = %d\n", 2132703d4b2STomas Winkler pdev->irq); 214f8a09605STomas Winkler goto end; 2152703d4b2STomas Winkler } 2162703d4b2STomas Winkler 217c4d589beSTomas Winkler if (mei_start(dev)) { 2182703d4b2STomas Winkler dev_err(&pdev->dev, "init hw failure.\n"); 2192703d4b2STomas Winkler err = -ENODEV; 2202703d4b2STomas Winkler goto release_irq; 2212703d4b2STomas Winkler } 2222703d4b2STomas Winkler 223180ea05bSTomas Winkler pm_runtime_set_autosuspend_delay(&pdev->dev, MEI_ME_RPM_TIMEOUT); 224180ea05bSTomas Winkler pm_runtime_use_autosuspend(&pdev->dev); 225180ea05bSTomas Winkler 226f3d8e878SAlexander Usyskin err = mei_register(dev, &pdev->dev); 2272703d4b2STomas Winkler if (err) 2281f7e489aSAlexander Usyskin goto stop; 2292703d4b2STomas Winkler 2302703d4b2STomas Winkler pci_set_drvdata(pdev, dev); 2312703d4b2STomas Winkler 232e13fa90cSTomas Winkler /* 233557909e1SAlexander Usyskin * MEI requires to resume from runtime suspend mode 234557909e1SAlexander Usyskin * in order to perform link reset flow upon system suspend. 235557909e1SAlexander Usyskin */ 236c2eac4d3SRafael J. Wysocki dev_pm_set_driver_flags(&pdev->dev, DPM_FLAG_NEVER_SKIP); 237557909e1SAlexander Usyskin 238557909e1SAlexander Usyskin /* 239b42dc063SAlexander Usyskin * ME maps runtime suspend/resume to D0i states, 240b42dc063SAlexander Usyskin * hence we need to go around native PCI runtime service which 241b42dc063SAlexander Usyskin * eventually brings the device into D3cold/hot state, 242b42dc063SAlexander Usyskin * but the mei device cannot wake up from D3 unlike from D0i3. 243b42dc063SAlexander Usyskin * To get around the PCI device native runtime pm, 244b42dc063SAlexander Usyskin * ME uses runtime pm domain handlers which take precedence 245b42dc063SAlexander Usyskin * over the driver's pm handlers. 246e13fa90cSTomas Winkler */ 247e13fa90cSTomas Winkler mei_me_set_pm_domain(dev); 248e13fa90cSTomas Winkler 249cc365dcfSTomas Winkler if (mei_pg_is_enabled(dev)) { 250180ea05bSTomas Winkler pm_runtime_put_noidle(&pdev->dev); 251cc365dcfSTomas Winkler if (hw->d0i3_supported) 252cc365dcfSTomas Winkler pm_runtime_allow(&pdev->dev); 253cc365dcfSTomas Winkler } 254180ea05bSTomas Winkler 255c4e87b52SAlexander Usyskin dev_dbg(&pdev->dev, "initialization successful.\n"); 2562703d4b2STomas Winkler 2572703d4b2STomas Winkler return 0; 2582703d4b2STomas Winkler 2591f7e489aSAlexander Usyskin stop: 2601f7e489aSAlexander Usyskin mei_stop(dev); 2612703d4b2STomas Winkler release_irq: 262dc844b0dSTomas Winkler mei_cancel_work(dev); 2632703d4b2STomas Winkler mei_disable_interrupts(dev); 2642703d4b2STomas Winkler free_irq(pdev->irq, dev); 2652703d4b2STomas Winkler end: 2662703d4b2STomas Winkler dev_err(&pdev->dev, "initialization failed.\n"); 2672703d4b2STomas Winkler return err; 2682703d4b2STomas Winkler } 2692703d4b2STomas Winkler 2702703d4b2STomas Winkler /** 2715c4c0106STomas Winkler * mei_me_shutdown - Device Removal Routine 2725c4c0106STomas Winkler * 2735c4c0106STomas Winkler * @pdev: PCI device structure 2745c4c0106STomas Winkler * 2755c4c0106STomas Winkler * mei_me_shutdown is called from the reboot notifier 2765c4c0106STomas Winkler * it's a simplified version of remove so we go down 2775c4c0106STomas Winkler * faster. 2785c4c0106STomas Winkler */ 2795c4c0106STomas Winkler static void mei_me_shutdown(struct pci_dev *pdev) 2805c4c0106STomas Winkler { 2815c4c0106STomas Winkler struct mei_device *dev; 2825c4c0106STomas Winkler 2835c4c0106STomas Winkler dev = pci_get_drvdata(pdev); 2845c4c0106STomas Winkler if (!dev) 2855c4c0106STomas Winkler return; 2865c4c0106STomas Winkler 2875c4c0106STomas Winkler dev_dbg(&pdev->dev, "shutdown\n"); 2885c4c0106STomas Winkler mei_stop(dev); 2895c4c0106STomas Winkler 2905c4c0106STomas Winkler mei_me_unset_pm_domain(dev); 2915c4c0106STomas Winkler 2925c4c0106STomas Winkler mei_disable_interrupts(dev); 2935c4c0106STomas Winkler free_irq(pdev->irq, dev); 2945c4c0106STomas Winkler } 2955c4c0106STomas Winkler 2965c4c0106STomas Winkler /** 297ce23139cSAlexander Usyskin * mei_me_remove - Device Removal Routine 2982703d4b2STomas Winkler * 2992703d4b2STomas Winkler * @pdev: PCI device structure 3002703d4b2STomas Winkler * 3015c4c0106STomas Winkler * mei_me_remove is called by the PCI subsystem to alert the driver 3022703d4b2STomas Winkler * that it should release a PCI device. 3032703d4b2STomas Winkler */ 304b68301e9STomas Winkler static void mei_me_remove(struct pci_dev *pdev) 3052703d4b2STomas Winkler { 3062703d4b2STomas Winkler struct mei_device *dev; 3072703d4b2STomas Winkler 3082703d4b2STomas Winkler dev = pci_get_drvdata(pdev); 3092703d4b2STomas Winkler if (!dev) 3102703d4b2STomas Winkler return; 3112703d4b2STomas Winkler 312180ea05bSTomas Winkler if (mei_pg_is_enabled(dev)) 313180ea05bSTomas Winkler pm_runtime_get_noresume(&pdev->dev); 314180ea05bSTomas Winkler 315ed6f7ac1SPaul Bolle dev_dbg(&pdev->dev, "stop\n"); 3167cb035d9STomas Winkler mei_stop(dev); 3172703d4b2STomas Winkler 318e13fa90cSTomas Winkler mei_me_unset_pm_domain(dev); 319e13fa90cSTomas Winkler 3202703d4b2STomas Winkler mei_disable_interrupts(dev); 3212703d4b2STomas Winkler 3222703d4b2STomas Winkler free_irq(pdev->irq, dev); 3232703d4b2STomas Winkler 32430e53bb8STomas Winkler mei_deregister(dev); 3252703d4b2STomas Winkler } 326f8a09605STomas Winkler 32716833257SAlexander Usyskin #ifdef CONFIG_PM_SLEEP 328b68301e9STomas Winkler static int mei_me_pci_suspend(struct device *device) 3292703d4b2STomas Winkler { 3302703d4b2STomas Winkler struct pci_dev *pdev = to_pci_dev(device); 3312703d4b2STomas Winkler struct mei_device *dev = pci_get_drvdata(pdev); 3322703d4b2STomas Winkler 3332703d4b2STomas Winkler if (!dev) 3342703d4b2STomas Winkler return -ENODEV; 3352703d4b2STomas Winkler 336ed6f7ac1SPaul Bolle dev_dbg(&pdev->dev, "suspend\n"); 3372703d4b2STomas Winkler 3387cb035d9STomas Winkler mei_stop(dev); 3397cb035d9STomas Winkler 3407cb035d9STomas Winkler mei_disable_interrupts(dev); 3412703d4b2STomas Winkler 3422703d4b2STomas Winkler free_irq(pdev->irq, dev); 3432703d4b2STomas Winkler pci_disable_msi(pdev); 3442703d4b2STomas Winkler 3457cb035d9STomas Winkler return 0; 3462703d4b2STomas Winkler } 3472703d4b2STomas Winkler 348b68301e9STomas Winkler static int mei_me_pci_resume(struct device *device) 3492703d4b2STomas Winkler { 3502703d4b2STomas Winkler struct pci_dev *pdev = to_pci_dev(device); 3512703d4b2STomas Winkler struct mei_device *dev; 3521fa55b4eSAlexander Usyskin unsigned int irqflags; 3532703d4b2STomas Winkler int err; 3542703d4b2STomas Winkler 3552703d4b2STomas Winkler dev = pci_get_drvdata(pdev); 3562703d4b2STomas Winkler if (!dev) 3572703d4b2STomas Winkler return -ENODEV; 3582703d4b2STomas Winkler 3592703d4b2STomas Winkler pci_enable_msi(pdev); 3602703d4b2STomas Winkler 3611fa55b4eSAlexander Usyskin irqflags = pci_dev_msi_enabled(pdev) ? IRQF_ONESHOT : IRQF_SHARED; 3621fa55b4eSAlexander Usyskin 3632703d4b2STomas Winkler /* request and enable interrupt */ 3642703d4b2STomas Winkler err = request_threaded_irq(pdev->irq, 36506ecd645STomas Winkler mei_me_irq_quick_handler, 36606ecd645STomas Winkler mei_me_irq_thread_handler, 3671fa55b4eSAlexander Usyskin irqflags, KBUILD_MODNAME, dev); 3682703d4b2STomas Winkler 3692703d4b2STomas Winkler if (err) { 3702703d4b2STomas Winkler dev_err(&pdev->dev, "request_threaded_irq failed: irq = %d.\n", 3712703d4b2STomas Winkler pdev->irq); 3722703d4b2STomas Winkler return err; 3732703d4b2STomas Winkler } 3742703d4b2STomas Winkler 37533ec0826STomas Winkler err = mei_restart(dev); 37633ec0826STomas Winkler if (err) 37733ec0826STomas Winkler return err; 3782703d4b2STomas Winkler 3792703d4b2STomas Winkler /* Start timer if stopped in suspend */ 3802703d4b2STomas Winkler schedule_delayed_work(&dev->timer_work, HZ); 3812703d4b2STomas Winkler 38233ec0826STomas Winkler return 0; 3832703d4b2STomas Winkler } 384180ea05bSTomas Winkler #endif /* CONFIG_PM_SLEEP */ 38516833257SAlexander Usyskin 386bbd6d050SRafael J. Wysocki #ifdef CONFIG_PM 387180ea05bSTomas Winkler static int mei_me_pm_runtime_idle(struct device *device) 388180ea05bSTomas Winkler { 389180ea05bSTomas Winkler struct mei_device *dev; 390180ea05bSTomas Winkler 391ab81f3f3SChuhong Yuan dev_dbg(device, "rpm: me: runtime_idle\n"); 392180ea05bSTomas Winkler 393ab81f3f3SChuhong Yuan dev = dev_get_drvdata(device); 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 mei_device *dev; 405180ea05bSTomas Winkler int ret; 406180ea05bSTomas Winkler 407ab81f3f3SChuhong Yuan dev_dbg(device, "rpm: me: runtime suspend\n"); 408180ea05bSTomas Winkler 409ab81f3f3SChuhong Yuan dev = dev_get_drvdata(device); 410180ea05bSTomas Winkler if (!dev) 411180ea05bSTomas Winkler return -ENODEV; 412180ea05bSTomas Winkler 413180ea05bSTomas Winkler mutex_lock(&dev->device_lock); 414180ea05bSTomas Winkler 415180ea05bSTomas Winkler if (mei_write_is_idle(dev)) 4162d1995fcSAlexander Usyskin ret = mei_me_pg_enter_sync(dev); 417180ea05bSTomas Winkler else 418180ea05bSTomas Winkler ret = -EAGAIN; 419180ea05bSTomas Winkler 420180ea05bSTomas Winkler mutex_unlock(&dev->device_lock); 421180ea05bSTomas Winkler 422ab81f3f3SChuhong Yuan dev_dbg(device, "rpm: me: runtime suspend ret=%d\n", ret); 423180ea05bSTomas Winkler 42477537ad2SAlexander Usyskin if (ret && ret != -EAGAIN) 42577537ad2SAlexander Usyskin schedule_work(&dev->reset_work); 42677537ad2SAlexander Usyskin 427180ea05bSTomas Winkler return ret; 428180ea05bSTomas Winkler } 429180ea05bSTomas Winkler 430180ea05bSTomas Winkler static int mei_me_pm_runtime_resume(struct device *device) 431180ea05bSTomas Winkler { 432180ea05bSTomas Winkler struct mei_device *dev; 433180ea05bSTomas Winkler int ret; 434180ea05bSTomas Winkler 435ab81f3f3SChuhong Yuan dev_dbg(device, "rpm: me: runtime resume\n"); 436180ea05bSTomas Winkler 437ab81f3f3SChuhong Yuan dev = dev_get_drvdata(device); 438180ea05bSTomas Winkler if (!dev) 439180ea05bSTomas Winkler return -ENODEV; 440180ea05bSTomas Winkler 441180ea05bSTomas Winkler mutex_lock(&dev->device_lock); 442180ea05bSTomas Winkler 4432d1995fcSAlexander Usyskin ret = mei_me_pg_exit_sync(dev); 444180ea05bSTomas Winkler 445180ea05bSTomas Winkler mutex_unlock(&dev->device_lock); 446180ea05bSTomas Winkler 447ab81f3f3SChuhong Yuan dev_dbg(device, "rpm: me: runtime resume ret = %d\n", ret); 448180ea05bSTomas Winkler 44977537ad2SAlexander Usyskin if (ret) 45077537ad2SAlexander Usyskin schedule_work(&dev->reset_work); 45177537ad2SAlexander Usyskin 452180ea05bSTomas Winkler return ret; 453180ea05bSTomas Winkler } 454e13fa90cSTomas Winkler 455e13fa90cSTomas Winkler /** 4567efceb55SGeert Uytterhoeven * mei_me_set_pm_domain - fill and set pm domain structure for device 457e13fa90cSTomas Winkler * 458e13fa90cSTomas Winkler * @dev: mei_device 459e13fa90cSTomas Winkler */ 460e13fa90cSTomas Winkler static inline void mei_me_set_pm_domain(struct mei_device *dev) 461e13fa90cSTomas Winkler { 462d08b8fc0STomas Winkler struct pci_dev *pdev = to_pci_dev(dev->dev); 463e13fa90cSTomas Winkler 464e13fa90cSTomas Winkler if (pdev->dev.bus && pdev->dev.bus->pm) { 465e13fa90cSTomas Winkler dev->pg_domain.ops = *pdev->dev.bus->pm; 466e13fa90cSTomas Winkler 467e13fa90cSTomas Winkler dev->pg_domain.ops.runtime_suspend = mei_me_pm_runtime_suspend; 468e13fa90cSTomas Winkler dev->pg_domain.ops.runtime_resume = mei_me_pm_runtime_resume; 469e13fa90cSTomas Winkler dev->pg_domain.ops.runtime_idle = mei_me_pm_runtime_idle; 470e13fa90cSTomas Winkler 471989561deSTomeu Vizoso dev_pm_domain_set(&pdev->dev, &dev->pg_domain); 472e13fa90cSTomas Winkler } 473e13fa90cSTomas Winkler } 474e13fa90cSTomas Winkler 475e13fa90cSTomas Winkler /** 4767efceb55SGeert Uytterhoeven * mei_me_unset_pm_domain - clean pm domain structure for device 477e13fa90cSTomas Winkler * 478e13fa90cSTomas Winkler * @dev: mei_device 479e13fa90cSTomas Winkler */ 480e13fa90cSTomas Winkler static inline void mei_me_unset_pm_domain(struct mei_device *dev) 481e13fa90cSTomas Winkler { 482e13fa90cSTomas Winkler /* stop using pm callbacks if any */ 483989561deSTomeu Vizoso dev_pm_domain_set(dev->dev, NULL); 484e13fa90cSTomas Winkler } 485180ea05bSTomas Winkler 486180ea05bSTomas Winkler static const struct dev_pm_ops mei_me_pm_ops = { 487180ea05bSTomas Winkler SET_SYSTEM_SLEEP_PM_OPS(mei_me_pci_suspend, 488180ea05bSTomas Winkler mei_me_pci_resume) 489180ea05bSTomas Winkler SET_RUNTIME_PM_OPS( 490180ea05bSTomas Winkler mei_me_pm_runtime_suspend, 491180ea05bSTomas Winkler mei_me_pm_runtime_resume, 492180ea05bSTomas Winkler mei_me_pm_runtime_idle) 493180ea05bSTomas Winkler }; 494180ea05bSTomas Winkler 495b68301e9STomas Winkler #define MEI_ME_PM_OPS (&mei_me_pm_ops) 4962703d4b2STomas Winkler #else 497b68301e9STomas Winkler #define MEI_ME_PM_OPS NULL 498180ea05bSTomas Winkler #endif /* CONFIG_PM */ 4992703d4b2STomas Winkler /* 5002703d4b2STomas Winkler * PCI driver structure 5012703d4b2STomas Winkler */ 502b68301e9STomas Winkler static struct pci_driver mei_me_driver = { 5032703d4b2STomas Winkler .name = KBUILD_MODNAME, 504b68301e9STomas Winkler .id_table = mei_me_pci_tbl, 505b68301e9STomas Winkler .probe = mei_me_probe, 506b68301e9STomas Winkler .remove = mei_me_remove, 5075c4c0106STomas Winkler .shutdown = mei_me_shutdown, 508b68301e9STomas Winkler .driver.pm = MEI_ME_PM_OPS, 50967de6bf1SAlexander Usyskin .driver.probe_type = PROBE_PREFER_ASYNCHRONOUS, 5102703d4b2STomas Winkler }; 5112703d4b2STomas Winkler 512b68301e9STomas Winkler module_pci_driver(mei_me_driver); 5132703d4b2STomas Winkler 5142703d4b2STomas Winkler MODULE_AUTHOR("Intel Corporation"); 5152703d4b2STomas Winkler MODULE_DESCRIPTION("Intel(R) Management Engine Interface"); 5162703d4b2STomas Winkler MODULE_LICENSE("GPL v2"); 517