19fff0425STomas Winkler // SPDX-License-Identifier: GPL-2.0 22703d4b2STomas Winkler /* 32703d4b2STomas Winkler * Intel Management Engine Interface (Intel MEI) Linux driver 42703d4b2STomas Winkler * Copyright (c) 2003-2012, Intel Corporation. 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 64f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_IBXPK_1, MEI_ME_PCH_CFG)}, 65f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_IBXPK_2, MEI_ME_PCH_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)}, 68f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_PPT_1, MEI_ME_PCH_CFG)}, 69f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_PPT_2, MEI_ME_PCH_CFG)}, 70f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_PPT_3, MEI_ME_PCH_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 99efe814e9STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_ICP_LP, MEI_ME_PCH12_CFG)}, 100efe814e9STomas Winkler 1012703d4b2STomas Winkler /* required last entry */ 1022703d4b2STomas Winkler {0, } 1032703d4b2STomas Winkler }; 1042703d4b2STomas Winkler 105b68301e9STomas Winkler MODULE_DEVICE_TABLE(pci, mei_me_pci_tbl); 1062703d4b2STomas Winkler 107bbd6d050SRafael J. Wysocki #ifdef CONFIG_PM 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); 110e13fa90cSTomas Winkler #else 111e13fa90cSTomas Winkler static inline void mei_me_set_pm_domain(struct mei_device *dev) {} 112e13fa90cSTomas Winkler static inline void mei_me_unset_pm_domain(struct mei_device *dev) {} 113bbd6d050SRafael J. Wysocki #endif /* CONFIG_PM */ 114e13fa90cSTomas Winkler 1152703d4b2STomas Winkler /** 116ce23139cSAlexander Usyskin * mei_me_quirk_probe - probe for devices that doesn't valid ME interface 117393b148fSMasanari Iida * 1182703d4b2STomas Winkler * @pdev: PCI device structure 119c919951dSTomas Winkler * @cfg: per generation config 1202703d4b2STomas Winkler * 121a8605ea2SAlexander Usyskin * Return: true if ME Interface is valid, false otherwise 1222703d4b2STomas Winkler */ 123b68301e9STomas Winkler static bool mei_me_quirk_probe(struct pci_dev *pdev, 124c919951dSTomas Winkler const struct mei_cfg *cfg) 1252703d4b2STomas Winkler { 126c919951dSTomas Winkler if (cfg->quirk_probe && cfg->quirk_probe(pdev)) { 1272703d4b2STomas Winkler dev_info(&pdev->dev, "Device doesn't have valid ME Interface\n"); 1282703d4b2STomas Winkler return false; 1292703d4b2STomas Winkler } 130c919951dSTomas Winkler 131c919951dSTomas Winkler return true; 132c919951dSTomas Winkler } 133c919951dSTomas Winkler 1342703d4b2STomas Winkler /** 135ce23139cSAlexander Usyskin * mei_me_probe - Device Initialization Routine 1362703d4b2STomas Winkler * 1372703d4b2STomas Winkler * @pdev: PCI device structure 1382703d4b2STomas Winkler * @ent: entry in kcs_pci_tbl 1392703d4b2STomas Winkler * 140a8605ea2SAlexander Usyskin * Return: 0 on success, <0 on failure. 1412703d4b2STomas Winkler */ 142b68301e9STomas Winkler static int mei_me_probe(struct pci_dev *pdev, const struct pci_device_id *ent) 1432703d4b2STomas Winkler { 144f5ac3c49STomas Winkler const struct mei_cfg *cfg; 1452703d4b2STomas Winkler struct mei_device *dev; 14652c34561STomas Winkler struct mei_me_hw *hw; 1471fa55b4eSAlexander Usyskin unsigned int irqflags; 1482703d4b2STomas Winkler int err; 1492703d4b2STomas Winkler 150f5ac3c49STomas Winkler cfg = mei_me_get_cfg(ent->driver_data); 151f5ac3c49STomas Winkler if (!cfg) 152f5ac3c49STomas Winkler return -ENODEV; 1532703d4b2STomas Winkler 154c919951dSTomas Winkler if (!mei_me_quirk_probe(pdev, cfg)) 155c919951dSTomas Winkler return -ENODEV; 1562703d4b2STomas Winkler 1572703d4b2STomas Winkler /* enable pci dev */ 158f8a09605STomas Winkler err = pcim_enable_device(pdev); 1592703d4b2STomas Winkler if (err) { 1602703d4b2STomas Winkler dev_err(&pdev->dev, "failed to enable pci device.\n"); 1612703d4b2STomas Winkler goto end; 1622703d4b2STomas Winkler } 1632703d4b2STomas Winkler /* set PCI host mastering */ 1642703d4b2STomas Winkler pci_set_master(pdev); 165f8a09605STomas Winkler /* pci request regions and mapping IO device memory for mei driver */ 166f8a09605STomas Winkler err = pcim_iomap_regions(pdev, BIT(0), KBUILD_MODNAME); 1672703d4b2STomas Winkler if (err) { 1682703d4b2STomas Winkler dev_err(&pdev->dev, "failed to get pci regions.\n"); 169f8a09605STomas Winkler goto end; 1702703d4b2STomas Winkler } 1713ecfb168STomas Winkler 1723ecfb168STomas Winkler if (dma_set_mask(&pdev->dev, DMA_BIT_MASK(64)) || 1733ecfb168STomas Winkler dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64))) { 1743ecfb168STomas Winkler 1753ecfb168STomas Winkler err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32)); 1763ecfb168STomas Winkler if (err) 1773ecfb168STomas Winkler err = dma_set_coherent_mask(&pdev->dev, 1783ecfb168STomas Winkler DMA_BIT_MASK(32)); 1793ecfb168STomas Winkler } 1803ecfb168STomas Winkler if (err) { 1813ecfb168STomas Winkler dev_err(&pdev->dev, "No usable DMA configuration, aborting\n"); 182f8a09605STomas Winkler goto end; 1833ecfb168STomas Winkler } 1843ecfb168STomas Winkler 1852703d4b2STomas Winkler /* allocates and initializes the mei dev structure */ 1868d929d48SAlexander Usyskin dev = mei_me_dev_init(pdev, cfg); 1872703d4b2STomas Winkler if (!dev) { 1882703d4b2STomas Winkler err = -ENOMEM; 189f8a09605STomas Winkler goto end; 1902703d4b2STomas Winkler } 19152c34561STomas Winkler hw = to_me_hw(dev); 192f8a09605STomas Winkler hw->mem_addr = pcim_iomap_table(pdev)[0]; 193f8a09605STomas Winkler 1942703d4b2STomas Winkler pci_enable_msi(pdev); 1952703d4b2STomas Winkler 1962703d4b2STomas Winkler /* request and enable interrupt */ 1971fa55b4eSAlexander Usyskin irqflags = pci_dev_msi_enabled(pdev) ? IRQF_ONESHOT : IRQF_SHARED; 1981fa55b4eSAlexander Usyskin 1992703d4b2STomas Winkler err = request_threaded_irq(pdev->irq, 20006ecd645STomas Winkler mei_me_irq_quick_handler, 20106ecd645STomas Winkler mei_me_irq_thread_handler, 2021fa55b4eSAlexander Usyskin irqflags, KBUILD_MODNAME, dev); 2032703d4b2STomas Winkler if (err) { 2042703d4b2STomas Winkler dev_err(&pdev->dev, "request_threaded_irq failure. irq = %d\n", 2052703d4b2STomas Winkler pdev->irq); 206f8a09605STomas Winkler goto end; 2072703d4b2STomas Winkler } 2082703d4b2STomas Winkler 209c4d589beSTomas Winkler if (mei_start(dev)) { 2102703d4b2STomas Winkler dev_err(&pdev->dev, "init hw failure.\n"); 2112703d4b2STomas Winkler err = -ENODEV; 2122703d4b2STomas Winkler goto release_irq; 2132703d4b2STomas Winkler } 2142703d4b2STomas Winkler 215180ea05bSTomas Winkler pm_runtime_set_autosuspend_delay(&pdev->dev, MEI_ME_RPM_TIMEOUT); 216180ea05bSTomas Winkler pm_runtime_use_autosuspend(&pdev->dev); 217180ea05bSTomas Winkler 218f3d8e878SAlexander Usyskin err = mei_register(dev, &pdev->dev); 2192703d4b2STomas Winkler if (err) 2201f7e489aSAlexander Usyskin goto stop; 2212703d4b2STomas Winkler 2222703d4b2STomas Winkler pci_set_drvdata(pdev, dev); 2232703d4b2STomas Winkler 224e13fa90cSTomas Winkler /* 225557909e1SAlexander Usyskin * MEI requires to resume from runtime suspend mode 226557909e1SAlexander Usyskin * in order to perform link reset flow upon system suspend. 227557909e1SAlexander Usyskin */ 228c2eac4d3SRafael J. Wysocki dev_pm_set_driver_flags(&pdev->dev, DPM_FLAG_NEVER_SKIP); 229557909e1SAlexander Usyskin 230557909e1SAlexander Usyskin /* 231b42dc063SAlexander Usyskin * ME maps runtime suspend/resume to D0i states, 232b42dc063SAlexander Usyskin * hence we need to go around native PCI runtime service which 233b42dc063SAlexander Usyskin * eventually brings the device into D3cold/hot state, 234b42dc063SAlexander Usyskin * but the mei device cannot wake up from D3 unlike from D0i3. 235b42dc063SAlexander Usyskin * To get around the PCI device native runtime pm, 236b42dc063SAlexander Usyskin * ME uses runtime pm domain handlers which take precedence 237b42dc063SAlexander Usyskin * over the driver's pm handlers. 238e13fa90cSTomas Winkler */ 239e13fa90cSTomas Winkler mei_me_set_pm_domain(dev); 240e13fa90cSTomas Winkler 241cc365dcfSTomas Winkler if (mei_pg_is_enabled(dev)) { 242180ea05bSTomas Winkler pm_runtime_put_noidle(&pdev->dev); 243cc365dcfSTomas Winkler if (hw->d0i3_supported) 244cc365dcfSTomas Winkler pm_runtime_allow(&pdev->dev); 245cc365dcfSTomas Winkler } 246180ea05bSTomas Winkler 247c4e87b52SAlexander Usyskin dev_dbg(&pdev->dev, "initialization successful.\n"); 2482703d4b2STomas Winkler 2492703d4b2STomas Winkler return 0; 2502703d4b2STomas Winkler 2511f7e489aSAlexander Usyskin stop: 2521f7e489aSAlexander Usyskin mei_stop(dev); 2532703d4b2STomas Winkler release_irq: 254dc844b0dSTomas Winkler mei_cancel_work(dev); 2552703d4b2STomas Winkler mei_disable_interrupts(dev); 2562703d4b2STomas Winkler free_irq(pdev->irq, dev); 2572703d4b2STomas Winkler end: 2582703d4b2STomas Winkler dev_err(&pdev->dev, "initialization failed.\n"); 2592703d4b2STomas Winkler return err; 2602703d4b2STomas Winkler } 2612703d4b2STomas Winkler 2622703d4b2STomas Winkler /** 2635c4c0106STomas Winkler * mei_me_shutdown - Device Removal Routine 2645c4c0106STomas Winkler * 2655c4c0106STomas Winkler * @pdev: PCI device structure 2665c4c0106STomas Winkler * 2675c4c0106STomas Winkler * mei_me_shutdown is called from the reboot notifier 2685c4c0106STomas Winkler * it's a simplified version of remove so we go down 2695c4c0106STomas Winkler * faster. 2705c4c0106STomas Winkler */ 2715c4c0106STomas Winkler static void mei_me_shutdown(struct pci_dev *pdev) 2725c4c0106STomas Winkler { 2735c4c0106STomas Winkler struct mei_device *dev; 2745c4c0106STomas Winkler 2755c4c0106STomas Winkler dev = pci_get_drvdata(pdev); 2765c4c0106STomas Winkler if (!dev) 2775c4c0106STomas Winkler return; 2785c4c0106STomas Winkler 2795c4c0106STomas Winkler dev_dbg(&pdev->dev, "shutdown\n"); 2805c4c0106STomas Winkler mei_stop(dev); 2815c4c0106STomas Winkler 2825c4c0106STomas Winkler mei_me_unset_pm_domain(dev); 2835c4c0106STomas Winkler 2845c4c0106STomas Winkler mei_disable_interrupts(dev); 2855c4c0106STomas Winkler free_irq(pdev->irq, dev); 2865c4c0106STomas Winkler } 2875c4c0106STomas Winkler 2885c4c0106STomas Winkler /** 289ce23139cSAlexander Usyskin * mei_me_remove - Device Removal Routine 2902703d4b2STomas Winkler * 2912703d4b2STomas Winkler * @pdev: PCI device structure 2922703d4b2STomas Winkler * 2935c4c0106STomas Winkler * mei_me_remove is called by the PCI subsystem to alert the driver 2942703d4b2STomas Winkler * that it should release a PCI device. 2952703d4b2STomas Winkler */ 296b68301e9STomas Winkler static void mei_me_remove(struct pci_dev *pdev) 2972703d4b2STomas Winkler { 2982703d4b2STomas Winkler struct mei_device *dev; 2992703d4b2STomas Winkler 3002703d4b2STomas Winkler dev = pci_get_drvdata(pdev); 3012703d4b2STomas Winkler if (!dev) 3022703d4b2STomas Winkler return; 3032703d4b2STomas Winkler 304180ea05bSTomas Winkler if (mei_pg_is_enabled(dev)) 305180ea05bSTomas Winkler pm_runtime_get_noresume(&pdev->dev); 306180ea05bSTomas Winkler 307ed6f7ac1SPaul Bolle dev_dbg(&pdev->dev, "stop\n"); 3087cb035d9STomas Winkler mei_stop(dev); 3092703d4b2STomas Winkler 310e13fa90cSTomas Winkler mei_me_unset_pm_domain(dev); 311e13fa90cSTomas Winkler 3122703d4b2STomas Winkler mei_disable_interrupts(dev); 3132703d4b2STomas Winkler 3142703d4b2STomas Winkler free_irq(pdev->irq, dev); 3152703d4b2STomas Winkler 31630e53bb8STomas Winkler mei_deregister(dev); 3172703d4b2STomas Winkler } 318f8a09605STomas Winkler 31916833257SAlexander Usyskin #ifdef CONFIG_PM_SLEEP 320b68301e9STomas Winkler static int mei_me_pci_suspend(struct device *device) 3212703d4b2STomas Winkler { 3222703d4b2STomas Winkler struct pci_dev *pdev = to_pci_dev(device); 3232703d4b2STomas Winkler struct mei_device *dev = pci_get_drvdata(pdev); 3242703d4b2STomas Winkler 3252703d4b2STomas Winkler if (!dev) 3262703d4b2STomas Winkler return -ENODEV; 3272703d4b2STomas Winkler 328ed6f7ac1SPaul Bolle dev_dbg(&pdev->dev, "suspend\n"); 3292703d4b2STomas Winkler 3307cb035d9STomas Winkler mei_stop(dev); 3317cb035d9STomas Winkler 3327cb035d9STomas Winkler mei_disable_interrupts(dev); 3332703d4b2STomas Winkler 3342703d4b2STomas Winkler free_irq(pdev->irq, dev); 3352703d4b2STomas Winkler pci_disable_msi(pdev); 3362703d4b2STomas Winkler 3377cb035d9STomas Winkler return 0; 3382703d4b2STomas Winkler } 3392703d4b2STomas Winkler 340b68301e9STomas Winkler static int mei_me_pci_resume(struct device *device) 3412703d4b2STomas Winkler { 3422703d4b2STomas Winkler struct pci_dev *pdev = to_pci_dev(device); 3432703d4b2STomas Winkler struct mei_device *dev; 3441fa55b4eSAlexander Usyskin unsigned int irqflags; 3452703d4b2STomas Winkler int err; 3462703d4b2STomas Winkler 3472703d4b2STomas Winkler dev = pci_get_drvdata(pdev); 3482703d4b2STomas Winkler if (!dev) 3492703d4b2STomas Winkler return -ENODEV; 3502703d4b2STomas Winkler 3512703d4b2STomas Winkler pci_enable_msi(pdev); 3522703d4b2STomas Winkler 3531fa55b4eSAlexander Usyskin irqflags = pci_dev_msi_enabled(pdev) ? IRQF_ONESHOT : IRQF_SHARED; 3541fa55b4eSAlexander Usyskin 3552703d4b2STomas Winkler /* request and enable interrupt */ 3562703d4b2STomas Winkler err = request_threaded_irq(pdev->irq, 35706ecd645STomas Winkler mei_me_irq_quick_handler, 35806ecd645STomas Winkler mei_me_irq_thread_handler, 3591fa55b4eSAlexander Usyskin irqflags, KBUILD_MODNAME, dev); 3602703d4b2STomas Winkler 3612703d4b2STomas Winkler if (err) { 3622703d4b2STomas Winkler dev_err(&pdev->dev, "request_threaded_irq failed: irq = %d.\n", 3632703d4b2STomas Winkler pdev->irq); 3642703d4b2STomas Winkler return err; 3652703d4b2STomas Winkler } 3662703d4b2STomas Winkler 36733ec0826STomas Winkler err = mei_restart(dev); 36833ec0826STomas Winkler if (err) 36933ec0826STomas Winkler return err; 3702703d4b2STomas Winkler 3712703d4b2STomas Winkler /* Start timer if stopped in suspend */ 3722703d4b2STomas Winkler schedule_delayed_work(&dev->timer_work, HZ); 3732703d4b2STomas Winkler 37433ec0826STomas Winkler return 0; 3752703d4b2STomas Winkler } 376180ea05bSTomas Winkler #endif /* CONFIG_PM_SLEEP */ 37716833257SAlexander Usyskin 378bbd6d050SRafael J. Wysocki #ifdef CONFIG_PM 379180ea05bSTomas Winkler static int mei_me_pm_runtime_idle(struct device *device) 380180ea05bSTomas Winkler { 381180ea05bSTomas Winkler struct pci_dev *pdev = to_pci_dev(device); 382180ea05bSTomas Winkler struct mei_device *dev; 383180ea05bSTomas Winkler 384180ea05bSTomas Winkler dev_dbg(&pdev->dev, "rpm: me: runtime_idle\n"); 385180ea05bSTomas Winkler 386180ea05bSTomas Winkler dev = pci_get_drvdata(pdev); 387180ea05bSTomas Winkler if (!dev) 388180ea05bSTomas Winkler return -ENODEV; 389180ea05bSTomas Winkler if (mei_write_is_idle(dev)) 390d5d83f8aSAlexander Usyskin pm_runtime_autosuspend(device); 391180ea05bSTomas Winkler 392180ea05bSTomas Winkler return -EBUSY; 393180ea05bSTomas Winkler } 394180ea05bSTomas Winkler 395180ea05bSTomas Winkler static int mei_me_pm_runtime_suspend(struct device *device) 396180ea05bSTomas Winkler { 397180ea05bSTomas Winkler struct pci_dev *pdev = to_pci_dev(device); 398180ea05bSTomas Winkler struct mei_device *dev; 399180ea05bSTomas Winkler int ret; 400180ea05bSTomas Winkler 401180ea05bSTomas Winkler dev_dbg(&pdev->dev, "rpm: me: runtime suspend\n"); 402180ea05bSTomas Winkler 403180ea05bSTomas Winkler dev = pci_get_drvdata(pdev); 404180ea05bSTomas Winkler if (!dev) 405180ea05bSTomas Winkler return -ENODEV; 406180ea05bSTomas Winkler 407180ea05bSTomas Winkler mutex_lock(&dev->device_lock); 408180ea05bSTomas Winkler 409180ea05bSTomas Winkler if (mei_write_is_idle(dev)) 4102d1995fcSAlexander Usyskin ret = mei_me_pg_enter_sync(dev); 411180ea05bSTomas Winkler else 412180ea05bSTomas Winkler ret = -EAGAIN; 413180ea05bSTomas Winkler 414180ea05bSTomas Winkler mutex_unlock(&dev->device_lock); 415180ea05bSTomas Winkler 416180ea05bSTomas Winkler dev_dbg(&pdev->dev, "rpm: me: runtime suspend ret=%d\n", ret); 417180ea05bSTomas Winkler 41877537ad2SAlexander Usyskin if (ret && ret != -EAGAIN) 41977537ad2SAlexander Usyskin schedule_work(&dev->reset_work); 42077537ad2SAlexander Usyskin 421180ea05bSTomas Winkler return ret; 422180ea05bSTomas Winkler } 423180ea05bSTomas Winkler 424180ea05bSTomas Winkler static int mei_me_pm_runtime_resume(struct device *device) 425180ea05bSTomas Winkler { 426180ea05bSTomas Winkler struct pci_dev *pdev = to_pci_dev(device); 427180ea05bSTomas Winkler struct mei_device *dev; 428180ea05bSTomas Winkler int ret; 429180ea05bSTomas Winkler 430180ea05bSTomas Winkler dev_dbg(&pdev->dev, "rpm: me: runtime resume\n"); 431180ea05bSTomas Winkler 432180ea05bSTomas Winkler dev = pci_get_drvdata(pdev); 433180ea05bSTomas Winkler if (!dev) 434180ea05bSTomas Winkler return -ENODEV; 435180ea05bSTomas Winkler 436180ea05bSTomas Winkler mutex_lock(&dev->device_lock); 437180ea05bSTomas Winkler 4382d1995fcSAlexander Usyskin ret = mei_me_pg_exit_sync(dev); 439180ea05bSTomas Winkler 440180ea05bSTomas Winkler mutex_unlock(&dev->device_lock); 441180ea05bSTomas Winkler 442180ea05bSTomas Winkler dev_dbg(&pdev->dev, "rpm: me: runtime resume ret = %d\n", ret); 443180ea05bSTomas Winkler 44477537ad2SAlexander Usyskin if (ret) 44577537ad2SAlexander Usyskin schedule_work(&dev->reset_work); 44677537ad2SAlexander Usyskin 447180ea05bSTomas Winkler return ret; 448180ea05bSTomas Winkler } 449e13fa90cSTomas Winkler 450e13fa90cSTomas Winkler /** 4517efceb55SGeert Uytterhoeven * mei_me_set_pm_domain - fill and set pm domain structure for device 452e13fa90cSTomas Winkler * 453e13fa90cSTomas Winkler * @dev: mei_device 454e13fa90cSTomas Winkler */ 455e13fa90cSTomas Winkler static inline void mei_me_set_pm_domain(struct mei_device *dev) 456e13fa90cSTomas Winkler { 457d08b8fc0STomas Winkler struct pci_dev *pdev = to_pci_dev(dev->dev); 458e13fa90cSTomas Winkler 459e13fa90cSTomas Winkler if (pdev->dev.bus && pdev->dev.bus->pm) { 460e13fa90cSTomas Winkler dev->pg_domain.ops = *pdev->dev.bus->pm; 461e13fa90cSTomas Winkler 462e13fa90cSTomas Winkler dev->pg_domain.ops.runtime_suspend = mei_me_pm_runtime_suspend; 463e13fa90cSTomas Winkler dev->pg_domain.ops.runtime_resume = mei_me_pm_runtime_resume; 464e13fa90cSTomas Winkler dev->pg_domain.ops.runtime_idle = mei_me_pm_runtime_idle; 465e13fa90cSTomas Winkler 466989561deSTomeu Vizoso dev_pm_domain_set(&pdev->dev, &dev->pg_domain); 467e13fa90cSTomas Winkler } 468e13fa90cSTomas Winkler } 469e13fa90cSTomas Winkler 470e13fa90cSTomas Winkler /** 4717efceb55SGeert Uytterhoeven * mei_me_unset_pm_domain - clean pm domain structure for device 472e13fa90cSTomas Winkler * 473e13fa90cSTomas Winkler * @dev: mei_device 474e13fa90cSTomas Winkler */ 475e13fa90cSTomas Winkler static inline void mei_me_unset_pm_domain(struct mei_device *dev) 476e13fa90cSTomas Winkler { 477e13fa90cSTomas Winkler /* stop using pm callbacks if any */ 478989561deSTomeu Vizoso dev_pm_domain_set(dev->dev, NULL); 479e13fa90cSTomas Winkler } 480180ea05bSTomas Winkler 481180ea05bSTomas Winkler static const struct dev_pm_ops mei_me_pm_ops = { 482180ea05bSTomas Winkler SET_SYSTEM_SLEEP_PM_OPS(mei_me_pci_suspend, 483180ea05bSTomas Winkler mei_me_pci_resume) 484180ea05bSTomas Winkler SET_RUNTIME_PM_OPS( 485180ea05bSTomas Winkler mei_me_pm_runtime_suspend, 486180ea05bSTomas Winkler mei_me_pm_runtime_resume, 487180ea05bSTomas Winkler mei_me_pm_runtime_idle) 488180ea05bSTomas Winkler }; 489180ea05bSTomas Winkler 490b68301e9STomas Winkler #define MEI_ME_PM_OPS (&mei_me_pm_ops) 4912703d4b2STomas Winkler #else 492b68301e9STomas Winkler #define MEI_ME_PM_OPS NULL 493180ea05bSTomas Winkler #endif /* CONFIG_PM */ 4942703d4b2STomas Winkler /* 4952703d4b2STomas Winkler * PCI driver structure 4962703d4b2STomas Winkler */ 497b68301e9STomas Winkler static struct pci_driver mei_me_driver = { 4982703d4b2STomas Winkler .name = KBUILD_MODNAME, 499b68301e9STomas Winkler .id_table = mei_me_pci_tbl, 500b68301e9STomas Winkler .probe = mei_me_probe, 501b68301e9STomas Winkler .remove = mei_me_remove, 5025c4c0106STomas Winkler .shutdown = mei_me_shutdown, 503b68301e9STomas Winkler .driver.pm = MEI_ME_PM_OPS, 50467de6bf1SAlexander Usyskin .driver.probe_type = PROBE_PREFER_ASYNCHRONOUS, 5052703d4b2STomas Winkler }; 5062703d4b2STomas Winkler 507b68301e9STomas Winkler module_pci_driver(mei_me_driver); 5082703d4b2STomas Winkler 5092703d4b2STomas Winkler MODULE_AUTHOR("Intel Corporation"); 5102703d4b2STomas Winkler MODULE_DESCRIPTION("Intel(R) Management Engine Interface"); 5112703d4b2STomas Winkler MODULE_LICENSE("GPL v2"); 512