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)}, 10182b29b9fSAlexander Usyskin {MEI_PCI_DEVICE(MEI_DEV_ID_CMP_V, MEI_ME_PCH12_CFG)}, 102559e575aSTomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_CMP_H, MEI_ME_PCH12_CFG)}, 103559e575aSTomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_CMP_H_3, MEI_ME_PCH8_CFG)}, 1044d86dfd3STomas Winkler 105efe814e9STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_ICP_LP, MEI_ME_PCH12_CFG)}, 106efe814e9STomas Winkler 10752f6efdfSAlexander Usyskin {MEI_PCI_DEVICE(MEI_DEV_ID_TGP_LP, MEI_ME_PCH15_CFG)}, 108587f1740STomas Winkler 10952f6efdfSAlexander Usyskin {MEI_PCI_DEVICE(MEI_DEV_ID_MCC, MEI_ME_PCH15_CFG)}, 1101be8624aSAlexander Usyskin {MEI_PCI_DEVICE(MEI_DEV_ID_MCC_4, MEI_ME_PCH8_CFG)}, 1111be8624aSAlexander Usyskin 1122703d4b2STomas Winkler /* required last entry */ 1132703d4b2STomas Winkler {0, } 1142703d4b2STomas Winkler }; 1152703d4b2STomas Winkler 116b68301e9STomas Winkler MODULE_DEVICE_TABLE(pci, mei_me_pci_tbl); 1172703d4b2STomas Winkler 118bbd6d050SRafael J. Wysocki #ifdef CONFIG_PM 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); 121e13fa90cSTomas Winkler #else 122e13fa90cSTomas Winkler static inline void mei_me_set_pm_domain(struct mei_device *dev) {} 123e13fa90cSTomas Winkler static inline void mei_me_unset_pm_domain(struct mei_device *dev) {} 124bbd6d050SRafael J. Wysocki #endif /* CONFIG_PM */ 125e13fa90cSTomas Winkler 126261e071aSTomas Winkler static int mei_me_read_fws(const struct mei_device *dev, int where, u32 *val) 127261e071aSTomas Winkler { 128261e071aSTomas Winkler struct pci_dev *pdev = to_pci_dev(dev->dev); 129261e071aSTomas Winkler 130261e071aSTomas Winkler return pci_read_config_dword(pdev, where, val); 131261e071aSTomas Winkler } 132261e071aSTomas Winkler 1332703d4b2STomas Winkler /** 134ce23139cSAlexander Usyskin * mei_me_quirk_probe - probe for devices that doesn't valid ME interface 135393b148fSMasanari Iida * 1362703d4b2STomas Winkler * @pdev: PCI device structure 137c919951dSTomas Winkler * @cfg: per generation config 1382703d4b2STomas Winkler * 139a8605ea2SAlexander Usyskin * Return: true if ME Interface is valid, false otherwise 1402703d4b2STomas Winkler */ 141b68301e9STomas Winkler static bool mei_me_quirk_probe(struct pci_dev *pdev, 142c919951dSTomas Winkler const struct mei_cfg *cfg) 1432703d4b2STomas Winkler { 144c919951dSTomas Winkler if (cfg->quirk_probe && cfg->quirk_probe(pdev)) { 1452703d4b2STomas Winkler dev_info(&pdev->dev, "Device doesn't have valid ME Interface\n"); 1462703d4b2STomas Winkler return false; 1472703d4b2STomas Winkler } 148c919951dSTomas Winkler 149c919951dSTomas Winkler return true; 150c919951dSTomas Winkler } 151c919951dSTomas Winkler 1522703d4b2STomas Winkler /** 153ce23139cSAlexander Usyskin * mei_me_probe - Device Initialization Routine 1542703d4b2STomas Winkler * 1552703d4b2STomas Winkler * @pdev: PCI device structure 1562703d4b2STomas Winkler * @ent: entry in kcs_pci_tbl 1572703d4b2STomas Winkler * 158a8605ea2SAlexander Usyskin * Return: 0 on success, <0 on failure. 1592703d4b2STomas Winkler */ 160b68301e9STomas Winkler static int mei_me_probe(struct pci_dev *pdev, const struct pci_device_id *ent) 1612703d4b2STomas Winkler { 162f5ac3c49STomas Winkler const struct mei_cfg *cfg; 1632703d4b2STomas Winkler struct mei_device *dev; 16452c34561STomas Winkler struct mei_me_hw *hw; 1651fa55b4eSAlexander Usyskin unsigned int irqflags; 1662703d4b2STomas Winkler int err; 1672703d4b2STomas Winkler 168f5ac3c49STomas Winkler cfg = mei_me_get_cfg(ent->driver_data); 169f5ac3c49STomas Winkler if (!cfg) 170f5ac3c49STomas Winkler return -ENODEV; 1712703d4b2STomas Winkler 172c919951dSTomas Winkler if (!mei_me_quirk_probe(pdev, cfg)) 173c919951dSTomas Winkler return -ENODEV; 1742703d4b2STomas Winkler 1752703d4b2STomas Winkler /* enable pci dev */ 176f8a09605STomas Winkler err = pcim_enable_device(pdev); 1772703d4b2STomas Winkler if (err) { 1782703d4b2STomas Winkler dev_err(&pdev->dev, "failed to enable pci device.\n"); 1792703d4b2STomas Winkler goto end; 1802703d4b2STomas Winkler } 1812703d4b2STomas Winkler /* set PCI host mastering */ 1822703d4b2STomas Winkler pci_set_master(pdev); 183f8a09605STomas Winkler /* pci request regions and mapping IO device memory for mei driver */ 184f8a09605STomas Winkler err = pcim_iomap_regions(pdev, BIT(0), KBUILD_MODNAME); 1852703d4b2STomas Winkler if (err) { 1862703d4b2STomas Winkler dev_err(&pdev->dev, "failed to get pci regions.\n"); 187f8a09605STomas Winkler goto end; 1882703d4b2STomas Winkler } 1893ecfb168STomas Winkler 1903ecfb168STomas Winkler if (dma_set_mask(&pdev->dev, DMA_BIT_MASK(64)) || 1913ecfb168STomas Winkler dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64))) { 1923ecfb168STomas Winkler 1933ecfb168STomas Winkler err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32)); 1943ecfb168STomas Winkler if (err) 1953ecfb168STomas Winkler err = dma_set_coherent_mask(&pdev->dev, 1963ecfb168STomas Winkler DMA_BIT_MASK(32)); 1973ecfb168STomas Winkler } 1983ecfb168STomas Winkler if (err) { 1993ecfb168STomas Winkler dev_err(&pdev->dev, "No usable DMA configuration, aborting\n"); 200f8a09605STomas Winkler goto end; 2013ecfb168STomas Winkler } 2023ecfb168STomas Winkler 2032703d4b2STomas Winkler /* allocates and initializes the mei dev structure */ 204907b471cSTomas Winkler dev = mei_me_dev_init(&pdev->dev, cfg); 2052703d4b2STomas Winkler if (!dev) { 2062703d4b2STomas Winkler err = -ENOMEM; 207f8a09605STomas Winkler goto end; 2082703d4b2STomas Winkler } 20952c34561STomas Winkler hw = to_me_hw(dev); 210f8a09605STomas Winkler hw->mem_addr = pcim_iomap_table(pdev)[0]; 211261b3e1fSAlexander Usyskin hw->irq = pdev->irq; 212261e071aSTomas Winkler hw->read_fws = mei_me_read_fws; 213f8a09605STomas Winkler 2142703d4b2STomas Winkler pci_enable_msi(pdev); 2152703d4b2STomas Winkler 2162703d4b2STomas Winkler /* request and enable interrupt */ 2171fa55b4eSAlexander Usyskin irqflags = pci_dev_msi_enabled(pdev) ? IRQF_ONESHOT : IRQF_SHARED; 2181fa55b4eSAlexander Usyskin 2192703d4b2STomas Winkler err = request_threaded_irq(pdev->irq, 22006ecd645STomas Winkler mei_me_irq_quick_handler, 22106ecd645STomas Winkler mei_me_irq_thread_handler, 2221fa55b4eSAlexander Usyskin irqflags, KBUILD_MODNAME, dev); 2232703d4b2STomas Winkler if (err) { 2242703d4b2STomas Winkler dev_err(&pdev->dev, "request_threaded_irq failure. irq = %d\n", 2252703d4b2STomas Winkler pdev->irq); 226f8a09605STomas Winkler goto end; 2272703d4b2STomas Winkler } 2282703d4b2STomas Winkler 229c4d589beSTomas Winkler if (mei_start(dev)) { 2302703d4b2STomas Winkler dev_err(&pdev->dev, "init hw failure.\n"); 2312703d4b2STomas Winkler err = -ENODEV; 2322703d4b2STomas Winkler goto release_irq; 2332703d4b2STomas Winkler } 2342703d4b2STomas Winkler 235180ea05bSTomas Winkler pm_runtime_set_autosuspend_delay(&pdev->dev, MEI_ME_RPM_TIMEOUT); 236180ea05bSTomas Winkler pm_runtime_use_autosuspend(&pdev->dev); 237180ea05bSTomas Winkler 238f3d8e878SAlexander Usyskin err = mei_register(dev, &pdev->dev); 2392703d4b2STomas Winkler if (err) 2401f7e489aSAlexander Usyskin goto stop; 2412703d4b2STomas Winkler 2422703d4b2STomas Winkler pci_set_drvdata(pdev, dev); 2432703d4b2STomas Winkler 244e13fa90cSTomas Winkler /* 245557909e1SAlexander Usyskin * MEI requires to resume from runtime suspend mode 246557909e1SAlexander Usyskin * in order to perform link reset flow upon system suspend. 247557909e1SAlexander Usyskin */ 248c2eac4d3SRafael J. Wysocki dev_pm_set_driver_flags(&pdev->dev, DPM_FLAG_NEVER_SKIP); 249557909e1SAlexander Usyskin 250557909e1SAlexander Usyskin /* 251b42dc063SAlexander Usyskin * ME maps runtime suspend/resume to D0i states, 252b42dc063SAlexander Usyskin * hence we need to go around native PCI runtime service which 253b42dc063SAlexander Usyskin * eventually brings the device into D3cold/hot state, 254b42dc063SAlexander Usyskin * but the mei device cannot wake up from D3 unlike from D0i3. 255b42dc063SAlexander Usyskin * To get around the PCI device native runtime pm, 256b42dc063SAlexander Usyskin * ME uses runtime pm domain handlers which take precedence 257b42dc063SAlexander Usyskin * over the driver's pm handlers. 258e13fa90cSTomas Winkler */ 259e13fa90cSTomas Winkler mei_me_set_pm_domain(dev); 260e13fa90cSTomas Winkler 261cc365dcfSTomas Winkler if (mei_pg_is_enabled(dev)) { 262180ea05bSTomas Winkler pm_runtime_put_noidle(&pdev->dev); 263cc365dcfSTomas Winkler if (hw->d0i3_supported) 264cc365dcfSTomas Winkler pm_runtime_allow(&pdev->dev); 265cc365dcfSTomas Winkler } 266180ea05bSTomas Winkler 267c4e87b52SAlexander Usyskin dev_dbg(&pdev->dev, "initialization successful.\n"); 2682703d4b2STomas Winkler 2692703d4b2STomas Winkler return 0; 2702703d4b2STomas Winkler 2711f7e489aSAlexander Usyskin stop: 2721f7e489aSAlexander Usyskin mei_stop(dev); 2732703d4b2STomas Winkler release_irq: 274dc844b0dSTomas Winkler mei_cancel_work(dev); 2752703d4b2STomas Winkler mei_disable_interrupts(dev); 2762703d4b2STomas Winkler free_irq(pdev->irq, dev); 2772703d4b2STomas Winkler end: 2782703d4b2STomas Winkler dev_err(&pdev->dev, "initialization failed.\n"); 2792703d4b2STomas Winkler return err; 2802703d4b2STomas Winkler } 2812703d4b2STomas Winkler 2822703d4b2STomas Winkler /** 2835c4c0106STomas Winkler * mei_me_shutdown - Device Removal Routine 2845c4c0106STomas Winkler * 2855c4c0106STomas Winkler * @pdev: PCI device structure 2865c4c0106STomas Winkler * 2875c4c0106STomas Winkler * mei_me_shutdown is called from the reboot notifier 2885c4c0106STomas Winkler * it's a simplified version of remove so we go down 2895c4c0106STomas Winkler * faster. 2905c4c0106STomas Winkler */ 2915c4c0106STomas Winkler static void mei_me_shutdown(struct pci_dev *pdev) 2925c4c0106STomas Winkler { 2935c4c0106STomas Winkler struct mei_device *dev; 2945c4c0106STomas Winkler 2955c4c0106STomas Winkler dev = pci_get_drvdata(pdev); 2965c4c0106STomas Winkler if (!dev) 2975c4c0106STomas Winkler return; 2985c4c0106STomas Winkler 2995c4c0106STomas Winkler dev_dbg(&pdev->dev, "shutdown\n"); 3005c4c0106STomas Winkler mei_stop(dev); 3015c4c0106STomas Winkler 3025c4c0106STomas Winkler mei_me_unset_pm_domain(dev); 3035c4c0106STomas Winkler 3045c4c0106STomas Winkler mei_disable_interrupts(dev); 3055c4c0106STomas Winkler free_irq(pdev->irq, dev); 3065c4c0106STomas Winkler } 3075c4c0106STomas Winkler 3085c4c0106STomas Winkler /** 309ce23139cSAlexander Usyskin * mei_me_remove - Device Removal Routine 3102703d4b2STomas Winkler * 3112703d4b2STomas Winkler * @pdev: PCI device structure 3122703d4b2STomas Winkler * 3135c4c0106STomas Winkler * mei_me_remove is called by the PCI subsystem to alert the driver 3142703d4b2STomas Winkler * that it should release a PCI device. 3152703d4b2STomas Winkler */ 316b68301e9STomas Winkler static void mei_me_remove(struct pci_dev *pdev) 3172703d4b2STomas Winkler { 3182703d4b2STomas Winkler struct mei_device *dev; 3192703d4b2STomas Winkler 3202703d4b2STomas Winkler dev = pci_get_drvdata(pdev); 3212703d4b2STomas Winkler if (!dev) 3222703d4b2STomas Winkler return; 3232703d4b2STomas Winkler 324180ea05bSTomas Winkler if (mei_pg_is_enabled(dev)) 325180ea05bSTomas Winkler pm_runtime_get_noresume(&pdev->dev); 326180ea05bSTomas Winkler 327ed6f7ac1SPaul Bolle dev_dbg(&pdev->dev, "stop\n"); 3287cb035d9STomas Winkler mei_stop(dev); 3292703d4b2STomas Winkler 330e13fa90cSTomas Winkler mei_me_unset_pm_domain(dev); 331e13fa90cSTomas Winkler 3322703d4b2STomas Winkler mei_disable_interrupts(dev); 3332703d4b2STomas Winkler 3342703d4b2STomas Winkler free_irq(pdev->irq, dev); 3352703d4b2STomas Winkler 33630e53bb8STomas Winkler mei_deregister(dev); 3372703d4b2STomas Winkler } 338f8a09605STomas Winkler 33916833257SAlexander Usyskin #ifdef CONFIG_PM_SLEEP 340b68301e9STomas Winkler static int mei_me_pci_suspend(struct device *device) 3412703d4b2STomas Winkler { 3422703d4b2STomas Winkler struct pci_dev *pdev = to_pci_dev(device); 3432703d4b2STomas Winkler struct mei_device *dev = pci_get_drvdata(pdev); 3442703d4b2STomas Winkler 3452703d4b2STomas Winkler if (!dev) 3462703d4b2STomas Winkler return -ENODEV; 3472703d4b2STomas Winkler 348ed6f7ac1SPaul Bolle dev_dbg(&pdev->dev, "suspend\n"); 3492703d4b2STomas Winkler 3507cb035d9STomas Winkler mei_stop(dev); 3517cb035d9STomas Winkler 3527cb035d9STomas Winkler mei_disable_interrupts(dev); 3532703d4b2STomas Winkler 3542703d4b2STomas Winkler free_irq(pdev->irq, dev); 3552703d4b2STomas Winkler pci_disable_msi(pdev); 3562703d4b2STomas Winkler 3577cb035d9STomas Winkler return 0; 3582703d4b2STomas Winkler } 3592703d4b2STomas Winkler 360b68301e9STomas Winkler static int mei_me_pci_resume(struct device *device) 3612703d4b2STomas Winkler { 3622703d4b2STomas Winkler struct pci_dev *pdev = to_pci_dev(device); 3632703d4b2STomas Winkler struct mei_device *dev; 3641fa55b4eSAlexander Usyskin unsigned int irqflags; 3652703d4b2STomas Winkler int err; 3662703d4b2STomas Winkler 3672703d4b2STomas Winkler dev = pci_get_drvdata(pdev); 3682703d4b2STomas Winkler if (!dev) 3692703d4b2STomas Winkler return -ENODEV; 3702703d4b2STomas Winkler 3712703d4b2STomas Winkler pci_enable_msi(pdev); 3722703d4b2STomas Winkler 3731fa55b4eSAlexander Usyskin irqflags = pci_dev_msi_enabled(pdev) ? IRQF_ONESHOT : IRQF_SHARED; 3741fa55b4eSAlexander Usyskin 3752703d4b2STomas Winkler /* request and enable interrupt */ 3762703d4b2STomas Winkler err = request_threaded_irq(pdev->irq, 37706ecd645STomas Winkler mei_me_irq_quick_handler, 37806ecd645STomas Winkler mei_me_irq_thread_handler, 3791fa55b4eSAlexander Usyskin irqflags, KBUILD_MODNAME, dev); 3802703d4b2STomas Winkler 3812703d4b2STomas Winkler if (err) { 3822703d4b2STomas Winkler dev_err(&pdev->dev, "request_threaded_irq failed: irq = %d.\n", 3832703d4b2STomas Winkler pdev->irq); 3842703d4b2STomas Winkler return err; 3852703d4b2STomas Winkler } 3862703d4b2STomas Winkler 38733ec0826STomas Winkler err = mei_restart(dev); 38833ec0826STomas Winkler if (err) 38933ec0826STomas Winkler return err; 3902703d4b2STomas Winkler 3912703d4b2STomas Winkler /* Start timer if stopped in suspend */ 3922703d4b2STomas Winkler schedule_delayed_work(&dev->timer_work, HZ); 3932703d4b2STomas Winkler 39433ec0826STomas Winkler return 0; 3952703d4b2STomas Winkler } 396180ea05bSTomas Winkler #endif /* CONFIG_PM_SLEEP */ 39716833257SAlexander Usyskin 398bbd6d050SRafael J. Wysocki #ifdef CONFIG_PM 399180ea05bSTomas Winkler static int mei_me_pm_runtime_idle(struct device *device) 400180ea05bSTomas Winkler { 401180ea05bSTomas Winkler struct mei_device *dev; 402180ea05bSTomas Winkler 403ab81f3f3SChuhong Yuan dev_dbg(device, "rpm: me: runtime_idle\n"); 404180ea05bSTomas Winkler 405ab81f3f3SChuhong Yuan dev = dev_get_drvdata(device); 406180ea05bSTomas Winkler if (!dev) 407180ea05bSTomas Winkler return -ENODEV; 408180ea05bSTomas Winkler if (mei_write_is_idle(dev)) 409d5d83f8aSAlexander Usyskin pm_runtime_autosuspend(device); 410180ea05bSTomas Winkler 411180ea05bSTomas Winkler return -EBUSY; 412180ea05bSTomas Winkler } 413180ea05bSTomas Winkler 414180ea05bSTomas Winkler static int mei_me_pm_runtime_suspend(struct device *device) 415180ea05bSTomas Winkler { 416180ea05bSTomas Winkler struct mei_device *dev; 417180ea05bSTomas Winkler int ret; 418180ea05bSTomas Winkler 419ab81f3f3SChuhong Yuan dev_dbg(device, "rpm: me: runtime suspend\n"); 420180ea05bSTomas Winkler 421ab81f3f3SChuhong Yuan dev = dev_get_drvdata(device); 422180ea05bSTomas Winkler if (!dev) 423180ea05bSTomas Winkler return -ENODEV; 424180ea05bSTomas Winkler 425180ea05bSTomas Winkler mutex_lock(&dev->device_lock); 426180ea05bSTomas Winkler 427180ea05bSTomas Winkler if (mei_write_is_idle(dev)) 4282d1995fcSAlexander Usyskin ret = mei_me_pg_enter_sync(dev); 429180ea05bSTomas Winkler else 430180ea05bSTomas Winkler ret = -EAGAIN; 431180ea05bSTomas Winkler 432180ea05bSTomas Winkler mutex_unlock(&dev->device_lock); 433180ea05bSTomas Winkler 434ab81f3f3SChuhong Yuan dev_dbg(device, "rpm: me: runtime suspend ret=%d\n", ret); 435180ea05bSTomas Winkler 43677537ad2SAlexander Usyskin if (ret && ret != -EAGAIN) 43777537ad2SAlexander Usyskin schedule_work(&dev->reset_work); 43877537ad2SAlexander Usyskin 439180ea05bSTomas Winkler return ret; 440180ea05bSTomas Winkler } 441180ea05bSTomas Winkler 442180ea05bSTomas Winkler static int mei_me_pm_runtime_resume(struct device *device) 443180ea05bSTomas Winkler { 444180ea05bSTomas Winkler struct mei_device *dev; 445180ea05bSTomas Winkler int ret; 446180ea05bSTomas Winkler 447ab81f3f3SChuhong Yuan dev_dbg(device, "rpm: me: runtime resume\n"); 448180ea05bSTomas Winkler 449ab81f3f3SChuhong Yuan dev = dev_get_drvdata(device); 450180ea05bSTomas Winkler if (!dev) 451180ea05bSTomas Winkler return -ENODEV; 452180ea05bSTomas Winkler 453180ea05bSTomas Winkler mutex_lock(&dev->device_lock); 454180ea05bSTomas Winkler 4552d1995fcSAlexander Usyskin ret = mei_me_pg_exit_sync(dev); 456180ea05bSTomas Winkler 457180ea05bSTomas Winkler mutex_unlock(&dev->device_lock); 458180ea05bSTomas Winkler 459ab81f3f3SChuhong Yuan dev_dbg(device, "rpm: me: runtime resume ret = %d\n", ret); 460180ea05bSTomas Winkler 46177537ad2SAlexander Usyskin if (ret) 46277537ad2SAlexander Usyskin schedule_work(&dev->reset_work); 46377537ad2SAlexander Usyskin 464180ea05bSTomas Winkler return ret; 465180ea05bSTomas Winkler } 466e13fa90cSTomas Winkler 467e13fa90cSTomas Winkler /** 4687efceb55SGeert Uytterhoeven * mei_me_set_pm_domain - fill and set pm domain structure for device 469e13fa90cSTomas Winkler * 470e13fa90cSTomas Winkler * @dev: mei_device 471e13fa90cSTomas Winkler */ 472e13fa90cSTomas Winkler static inline void mei_me_set_pm_domain(struct mei_device *dev) 473e13fa90cSTomas Winkler { 474d08b8fc0STomas Winkler struct pci_dev *pdev = to_pci_dev(dev->dev); 475e13fa90cSTomas Winkler 476e13fa90cSTomas Winkler if (pdev->dev.bus && pdev->dev.bus->pm) { 477e13fa90cSTomas Winkler dev->pg_domain.ops = *pdev->dev.bus->pm; 478e13fa90cSTomas Winkler 479e13fa90cSTomas Winkler dev->pg_domain.ops.runtime_suspend = mei_me_pm_runtime_suspend; 480e13fa90cSTomas Winkler dev->pg_domain.ops.runtime_resume = mei_me_pm_runtime_resume; 481e13fa90cSTomas Winkler dev->pg_domain.ops.runtime_idle = mei_me_pm_runtime_idle; 482e13fa90cSTomas Winkler 483989561deSTomeu Vizoso dev_pm_domain_set(&pdev->dev, &dev->pg_domain); 484e13fa90cSTomas Winkler } 485e13fa90cSTomas Winkler } 486e13fa90cSTomas Winkler 487e13fa90cSTomas Winkler /** 4887efceb55SGeert Uytterhoeven * mei_me_unset_pm_domain - clean pm domain structure for device 489e13fa90cSTomas Winkler * 490e13fa90cSTomas Winkler * @dev: mei_device 491e13fa90cSTomas Winkler */ 492e13fa90cSTomas Winkler static inline void mei_me_unset_pm_domain(struct mei_device *dev) 493e13fa90cSTomas Winkler { 494e13fa90cSTomas Winkler /* stop using pm callbacks if any */ 495989561deSTomeu Vizoso dev_pm_domain_set(dev->dev, NULL); 496e13fa90cSTomas Winkler } 497180ea05bSTomas Winkler 498180ea05bSTomas Winkler static const struct dev_pm_ops mei_me_pm_ops = { 499180ea05bSTomas Winkler SET_SYSTEM_SLEEP_PM_OPS(mei_me_pci_suspend, 500180ea05bSTomas Winkler mei_me_pci_resume) 501180ea05bSTomas Winkler SET_RUNTIME_PM_OPS( 502180ea05bSTomas Winkler mei_me_pm_runtime_suspend, 503180ea05bSTomas Winkler mei_me_pm_runtime_resume, 504180ea05bSTomas Winkler mei_me_pm_runtime_idle) 505180ea05bSTomas Winkler }; 506180ea05bSTomas Winkler 507b68301e9STomas Winkler #define MEI_ME_PM_OPS (&mei_me_pm_ops) 5082703d4b2STomas Winkler #else 509b68301e9STomas Winkler #define MEI_ME_PM_OPS NULL 510180ea05bSTomas Winkler #endif /* CONFIG_PM */ 5112703d4b2STomas Winkler /* 5122703d4b2STomas Winkler * PCI driver structure 5132703d4b2STomas Winkler */ 514b68301e9STomas Winkler static struct pci_driver mei_me_driver = { 5152703d4b2STomas Winkler .name = KBUILD_MODNAME, 516b68301e9STomas Winkler .id_table = mei_me_pci_tbl, 517b68301e9STomas Winkler .probe = mei_me_probe, 518b68301e9STomas Winkler .remove = mei_me_remove, 5195c4c0106STomas Winkler .shutdown = mei_me_shutdown, 520b68301e9STomas Winkler .driver.pm = MEI_ME_PM_OPS, 52167de6bf1SAlexander Usyskin .driver.probe_type = PROBE_PREFER_ASYNCHRONOUS, 5222703d4b2STomas Winkler }; 5232703d4b2STomas Winkler 524b68301e9STomas Winkler module_pci_driver(mei_me_driver); 5252703d4b2STomas Winkler 5262703d4b2STomas Winkler MODULE_AUTHOR("Intel Corporation"); 5272703d4b2STomas Winkler MODULE_DESCRIPTION("Intel(R) Management Engine Interface"); 5282703d4b2STomas Winkler MODULE_LICENSE("GPL v2"); 529