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 1090db4a15dSTomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_JSP_N, MEI_ME_PCH15_CFG)}, 1100db4a15dSTomas Winkler 11152f6efdfSAlexander Usyskin {MEI_PCI_DEVICE(MEI_DEV_ID_MCC, MEI_ME_PCH15_CFG)}, 1121be8624aSAlexander Usyskin {MEI_PCI_DEVICE(MEI_DEV_ID_MCC_4, MEI_ME_PCH8_CFG)}, 1131be8624aSAlexander Usyskin 1142703d4b2STomas Winkler /* required last entry */ 1152703d4b2STomas Winkler {0, } 1162703d4b2STomas Winkler }; 1172703d4b2STomas Winkler 118b68301e9STomas Winkler MODULE_DEVICE_TABLE(pci, mei_me_pci_tbl); 1192703d4b2STomas Winkler 120bbd6d050SRafael J. Wysocki #ifdef CONFIG_PM 121e13fa90cSTomas Winkler static inline void mei_me_set_pm_domain(struct mei_device *dev); 122e13fa90cSTomas Winkler static inline void mei_me_unset_pm_domain(struct mei_device *dev); 123e13fa90cSTomas Winkler #else 124e13fa90cSTomas Winkler static inline void mei_me_set_pm_domain(struct mei_device *dev) {} 125e13fa90cSTomas Winkler static inline void mei_me_unset_pm_domain(struct mei_device *dev) {} 126bbd6d050SRafael J. Wysocki #endif /* CONFIG_PM */ 127e13fa90cSTomas Winkler 128261e071aSTomas Winkler static int mei_me_read_fws(const struct mei_device *dev, int where, u32 *val) 129261e071aSTomas Winkler { 130261e071aSTomas Winkler struct pci_dev *pdev = to_pci_dev(dev->dev); 131261e071aSTomas Winkler 132261e071aSTomas Winkler return pci_read_config_dword(pdev, where, val); 133261e071aSTomas Winkler } 134261e071aSTomas Winkler 1352703d4b2STomas Winkler /** 136ce23139cSAlexander Usyskin * mei_me_quirk_probe - probe for devices that doesn't valid ME interface 137393b148fSMasanari Iida * 1382703d4b2STomas Winkler * @pdev: PCI device structure 139c919951dSTomas Winkler * @cfg: per generation config 1402703d4b2STomas Winkler * 141a8605ea2SAlexander Usyskin * Return: true if ME Interface is valid, false otherwise 1422703d4b2STomas Winkler */ 143b68301e9STomas Winkler static bool mei_me_quirk_probe(struct pci_dev *pdev, 144c919951dSTomas Winkler const struct mei_cfg *cfg) 1452703d4b2STomas Winkler { 146c919951dSTomas Winkler if (cfg->quirk_probe && cfg->quirk_probe(pdev)) { 1472703d4b2STomas Winkler dev_info(&pdev->dev, "Device doesn't have valid ME Interface\n"); 1482703d4b2STomas Winkler return false; 1492703d4b2STomas Winkler } 150c919951dSTomas Winkler 151c919951dSTomas Winkler return true; 152c919951dSTomas Winkler } 153c919951dSTomas Winkler 1542703d4b2STomas Winkler /** 155ce23139cSAlexander Usyskin * mei_me_probe - Device Initialization Routine 1562703d4b2STomas Winkler * 1572703d4b2STomas Winkler * @pdev: PCI device structure 1582703d4b2STomas Winkler * @ent: entry in kcs_pci_tbl 1592703d4b2STomas Winkler * 160a8605ea2SAlexander Usyskin * Return: 0 on success, <0 on failure. 1612703d4b2STomas Winkler */ 162b68301e9STomas Winkler static int mei_me_probe(struct pci_dev *pdev, const struct pci_device_id *ent) 1632703d4b2STomas Winkler { 164f5ac3c49STomas Winkler const struct mei_cfg *cfg; 1652703d4b2STomas Winkler struct mei_device *dev; 16652c34561STomas Winkler struct mei_me_hw *hw; 1671fa55b4eSAlexander Usyskin unsigned int irqflags; 1682703d4b2STomas Winkler int err; 1692703d4b2STomas Winkler 170f5ac3c49STomas Winkler cfg = mei_me_get_cfg(ent->driver_data); 171f5ac3c49STomas Winkler if (!cfg) 172f5ac3c49STomas Winkler return -ENODEV; 1732703d4b2STomas Winkler 174c919951dSTomas Winkler if (!mei_me_quirk_probe(pdev, cfg)) 175c919951dSTomas Winkler return -ENODEV; 1762703d4b2STomas Winkler 1772703d4b2STomas Winkler /* enable pci dev */ 178f8a09605STomas Winkler err = pcim_enable_device(pdev); 1792703d4b2STomas Winkler if (err) { 1802703d4b2STomas Winkler dev_err(&pdev->dev, "failed to enable pci device.\n"); 1812703d4b2STomas Winkler goto end; 1822703d4b2STomas Winkler } 1832703d4b2STomas Winkler /* set PCI host mastering */ 1842703d4b2STomas Winkler pci_set_master(pdev); 185f8a09605STomas Winkler /* pci request regions and mapping IO device memory for mei driver */ 186f8a09605STomas Winkler err = pcim_iomap_regions(pdev, BIT(0), KBUILD_MODNAME); 1872703d4b2STomas Winkler if (err) { 1882703d4b2STomas Winkler dev_err(&pdev->dev, "failed to get pci regions.\n"); 189f8a09605STomas Winkler goto end; 1902703d4b2STomas Winkler } 1913ecfb168STomas Winkler 1923ecfb168STomas Winkler if (dma_set_mask(&pdev->dev, DMA_BIT_MASK(64)) || 1933ecfb168STomas Winkler dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64))) { 1943ecfb168STomas Winkler 1953ecfb168STomas Winkler err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32)); 1963ecfb168STomas Winkler if (err) 1973ecfb168STomas Winkler err = dma_set_coherent_mask(&pdev->dev, 1983ecfb168STomas Winkler DMA_BIT_MASK(32)); 1993ecfb168STomas Winkler } 2003ecfb168STomas Winkler if (err) { 2013ecfb168STomas Winkler dev_err(&pdev->dev, "No usable DMA configuration, aborting\n"); 202f8a09605STomas Winkler goto end; 2033ecfb168STomas Winkler } 2043ecfb168STomas Winkler 2052703d4b2STomas Winkler /* allocates and initializes the mei dev structure */ 206907b471cSTomas Winkler dev = mei_me_dev_init(&pdev->dev, cfg); 2072703d4b2STomas Winkler if (!dev) { 2082703d4b2STomas Winkler err = -ENOMEM; 209f8a09605STomas Winkler goto end; 2102703d4b2STomas Winkler } 21152c34561STomas Winkler hw = to_me_hw(dev); 212f8a09605STomas Winkler hw->mem_addr = pcim_iomap_table(pdev)[0]; 213261b3e1fSAlexander Usyskin hw->irq = pdev->irq; 214261e071aSTomas Winkler hw->read_fws = mei_me_read_fws; 215f8a09605STomas Winkler 2162703d4b2STomas Winkler pci_enable_msi(pdev); 2172703d4b2STomas Winkler 2182703d4b2STomas Winkler /* request and enable interrupt */ 2191fa55b4eSAlexander Usyskin irqflags = pci_dev_msi_enabled(pdev) ? IRQF_ONESHOT : IRQF_SHARED; 2201fa55b4eSAlexander Usyskin 2212703d4b2STomas Winkler err = request_threaded_irq(pdev->irq, 22206ecd645STomas Winkler mei_me_irq_quick_handler, 22306ecd645STomas Winkler mei_me_irq_thread_handler, 2241fa55b4eSAlexander Usyskin irqflags, KBUILD_MODNAME, dev); 2252703d4b2STomas Winkler if (err) { 2262703d4b2STomas Winkler dev_err(&pdev->dev, "request_threaded_irq failure. irq = %d\n", 2272703d4b2STomas Winkler pdev->irq); 228f8a09605STomas Winkler goto end; 2292703d4b2STomas Winkler } 2302703d4b2STomas Winkler 231c4d589beSTomas Winkler if (mei_start(dev)) { 2322703d4b2STomas Winkler dev_err(&pdev->dev, "init hw failure.\n"); 2332703d4b2STomas Winkler err = -ENODEV; 2342703d4b2STomas Winkler goto release_irq; 2352703d4b2STomas Winkler } 2362703d4b2STomas Winkler 237180ea05bSTomas Winkler pm_runtime_set_autosuspend_delay(&pdev->dev, MEI_ME_RPM_TIMEOUT); 238180ea05bSTomas Winkler pm_runtime_use_autosuspend(&pdev->dev); 239180ea05bSTomas Winkler 240f3d8e878SAlexander Usyskin err = mei_register(dev, &pdev->dev); 2412703d4b2STomas Winkler if (err) 2421f7e489aSAlexander Usyskin goto stop; 2432703d4b2STomas Winkler 2442703d4b2STomas Winkler pci_set_drvdata(pdev, dev); 2452703d4b2STomas Winkler 246e13fa90cSTomas Winkler /* 247557909e1SAlexander Usyskin * MEI requires to resume from runtime suspend mode 248557909e1SAlexander Usyskin * in order to perform link reset flow upon system suspend. 249557909e1SAlexander Usyskin */ 250c2eac4d3SRafael J. Wysocki dev_pm_set_driver_flags(&pdev->dev, DPM_FLAG_NEVER_SKIP); 251557909e1SAlexander Usyskin 252557909e1SAlexander Usyskin /* 253b42dc063SAlexander Usyskin * ME maps runtime suspend/resume to D0i states, 254b42dc063SAlexander Usyskin * hence we need to go around native PCI runtime service which 255b42dc063SAlexander Usyskin * eventually brings the device into D3cold/hot state, 256b42dc063SAlexander Usyskin * but the mei device cannot wake up from D3 unlike from D0i3. 257b42dc063SAlexander Usyskin * To get around the PCI device native runtime pm, 258b42dc063SAlexander Usyskin * ME uses runtime pm domain handlers which take precedence 259b42dc063SAlexander Usyskin * over the driver's pm handlers. 260e13fa90cSTomas Winkler */ 261e13fa90cSTomas Winkler mei_me_set_pm_domain(dev); 262e13fa90cSTomas Winkler 263cc365dcfSTomas Winkler if (mei_pg_is_enabled(dev)) { 264180ea05bSTomas Winkler pm_runtime_put_noidle(&pdev->dev); 265cc365dcfSTomas Winkler if (hw->d0i3_supported) 266cc365dcfSTomas Winkler pm_runtime_allow(&pdev->dev); 267cc365dcfSTomas Winkler } 268180ea05bSTomas Winkler 269c4e87b52SAlexander Usyskin dev_dbg(&pdev->dev, "initialization successful.\n"); 2702703d4b2STomas Winkler 2712703d4b2STomas Winkler return 0; 2722703d4b2STomas Winkler 2731f7e489aSAlexander Usyskin stop: 2741f7e489aSAlexander Usyskin mei_stop(dev); 2752703d4b2STomas Winkler release_irq: 276dc844b0dSTomas Winkler mei_cancel_work(dev); 2772703d4b2STomas Winkler mei_disable_interrupts(dev); 2782703d4b2STomas Winkler free_irq(pdev->irq, dev); 2792703d4b2STomas Winkler end: 2802703d4b2STomas Winkler dev_err(&pdev->dev, "initialization failed.\n"); 2812703d4b2STomas Winkler return err; 2822703d4b2STomas Winkler } 2832703d4b2STomas Winkler 2842703d4b2STomas Winkler /** 2855c4c0106STomas Winkler * mei_me_shutdown - Device Removal Routine 2865c4c0106STomas Winkler * 2875c4c0106STomas Winkler * @pdev: PCI device structure 2885c4c0106STomas Winkler * 2895c4c0106STomas Winkler * mei_me_shutdown is called from the reboot notifier 2905c4c0106STomas Winkler * it's a simplified version of remove so we go down 2915c4c0106STomas Winkler * faster. 2925c4c0106STomas Winkler */ 2935c4c0106STomas Winkler static void mei_me_shutdown(struct pci_dev *pdev) 2945c4c0106STomas Winkler { 2955c4c0106STomas Winkler struct mei_device *dev; 2965c4c0106STomas Winkler 2975c4c0106STomas Winkler dev = pci_get_drvdata(pdev); 2985c4c0106STomas Winkler if (!dev) 2995c4c0106STomas Winkler return; 3005c4c0106STomas Winkler 3015c4c0106STomas Winkler dev_dbg(&pdev->dev, "shutdown\n"); 3025c4c0106STomas Winkler mei_stop(dev); 3035c4c0106STomas Winkler 3045c4c0106STomas Winkler mei_me_unset_pm_domain(dev); 3055c4c0106STomas Winkler 3065c4c0106STomas Winkler mei_disable_interrupts(dev); 3075c4c0106STomas Winkler free_irq(pdev->irq, dev); 3085c4c0106STomas Winkler } 3095c4c0106STomas Winkler 3105c4c0106STomas Winkler /** 311ce23139cSAlexander Usyskin * mei_me_remove - Device Removal Routine 3122703d4b2STomas Winkler * 3132703d4b2STomas Winkler * @pdev: PCI device structure 3142703d4b2STomas Winkler * 3155c4c0106STomas Winkler * mei_me_remove is called by the PCI subsystem to alert the driver 3162703d4b2STomas Winkler * that it should release a PCI device. 3172703d4b2STomas Winkler */ 318b68301e9STomas Winkler static void mei_me_remove(struct pci_dev *pdev) 3192703d4b2STomas Winkler { 3202703d4b2STomas Winkler struct mei_device *dev; 3212703d4b2STomas Winkler 3222703d4b2STomas Winkler dev = pci_get_drvdata(pdev); 3232703d4b2STomas Winkler if (!dev) 3242703d4b2STomas Winkler return; 3252703d4b2STomas Winkler 326180ea05bSTomas Winkler if (mei_pg_is_enabled(dev)) 327180ea05bSTomas Winkler pm_runtime_get_noresume(&pdev->dev); 328180ea05bSTomas Winkler 329ed6f7ac1SPaul Bolle dev_dbg(&pdev->dev, "stop\n"); 3307cb035d9STomas Winkler mei_stop(dev); 3312703d4b2STomas Winkler 332e13fa90cSTomas Winkler mei_me_unset_pm_domain(dev); 333e13fa90cSTomas Winkler 3342703d4b2STomas Winkler mei_disable_interrupts(dev); 3352703d4b2STomas Winkler 3362703d4b2STomas Winkler free_irq(pdev->irq, dev); 3372703d4b2STomas Winkler 33830e53bb8STomas Winkler mei_deregister(dev); 3392703d4b2STomas Winkler } 340f8a09605STomas Winkler 34116833257SAlexander Usyskin #ifdef CONFIG_PM_SLEEP 342b68301e9STomas Winkler static int mei_me_pci_suspend(struct device *device) 3432703d4b2STomas Winkler { 3442703d4b2STomas Winkler struct pci_dev *pdev = to_pci_dev(device); 3452703d4b2STomas Winkler struct mei_device *dev = pci_get_drvdata(pdev); 3462703d4b2STomas Winkler 3472703d4b2STomas Winkler if (!dev) 3482703d4b2STomas Winkler return -ENODEV; 3492703d4b2STomas Winkler 350ed6f7ac1SPaul Bolle dev_dbg(&pdev->dev, "suspend\n"); 3512703d4b2STomas Winkler 3527cb035d9STomas Winkler mei_stop(dev); 3537cb035d9STomas Winkler 3547cb035d9STomas Winkler mei_disable_interrupts(dev); 3552703d4b2STomas Winkler 3562703d4b2STomas Winkler free_irq(pdev->irq, dev); 3572703d4b2STomas Winkler pci_disable_msi(pdev); 3582703d4b2STomas Winkler 3597cb035d9STomas Winkler return 0; 3602703d4b2STomas Winkler } 3612703d4b2STomas Winkler 362b68301e9STomas Winkler static int mei_me_pci_resume(struct device *device) 3632703d4b2STomas Winkler { 3642703d4b2STomas Winkler struct pci_dev *pdev = to_pci_dev(device); 3652703d4b2STomas Winkler struct mei_device *dev; 3661fa55b4eSAlexander Usyskin unsigned int irqflags; 3672703d4b2STomas Winkler int err; 3682703d4b2STomas Winkler 3692703d4b2STomas Winkler dev = pci_get_drvdata(pdev); 3702703d4b2STomas Winkler if (!dev) 3712703d4b2STomas Winkler return -ENODEV; 3722703d4b2STomas Winkler 3732703d4b2STomas Winkler pci_enable_msi(pdev); 3742703d4b2STomas Winkler 3751fa55b4eSAlexander Usyskin irqflags = pci_dev_msi_enabled(pdev) ? IRQF_ONESHOT : IRQF_SHARED; 3761fa55b4eSAlexander Usyskin 3772703d4b2STomas Winkler /* request and enable interrupt */ 3782703d4b2STomas Winkler err = request_threaded_irq(pdev->irq, 37906ecd645STomas Winkler mei_me_irq_quick_handler, 38006ecd645STomas Winkler mei_me_irq_thread_handler, 3811fa55b4eSAlexander Usyskin irqflags, KBUILD_MODNAME, dev); 3822703d4b2STomas Winkler 3832703d4b2STomas Winkler if (err) { 3842703d4b2STomas Winkler dev_err(&pdev->dev, "request_threaded_irq failed: irq = %d.\n", 3852703d4b2STomas Winkler pdev->irq); 3862703d4b2STomas Winkler return err; 3872703d4b2STomas Winkler } 3882703d4b2STomas Winkler 38933ec0826STomas Winkler err = mei_restart(dev); 39033ec0826STomas Winkler if (err) 39133ec0826STomas Winkler return err; 3922703d4b2STomas Winkler 3932703d4b2STomas Winkler /* Start timer if stopped in suspend */ 3942703d4b2STomas Winkler schedule_delayed_work(&dev->timer_work, HZ); 3952703d4b2STomas Winkler 39633ec0826STomas Winkler return 0; 3972703d4b2STomas Winkler } 398180ea05bSTomas Winkler #endif /* CONFIG_PM_SLEEP */ 39916833257SAlexander Usyskin 400bbd6d050SRafael J. Wysocki #ifdef CONFIG_PM 401180ea05bSTomas Winkler static int mei_me_pm_runtime_idle(struct device *device) 402180ea05bSTomas Winkler { 403180ea05bSTomas Winkler struct mei_device *dev; 404180ea05bSTomas Winkler 405ab81f3f3SChuhong Yuan dev_dbg(device, "rpm: me: runtime_idle\n"); 406180ea05bSTomas Winkler 407ab81f3f3SChuhong Yuan dev = dev_get_drvdata(device); 408180ea05bSTomas Winkler if (!dev) 409180ea05bSTomas Winkler return -ENODEV; 410180ea05bSTomas Winkler if (mei_write_is_idle(dev)) 411d5d83f8aSAlexander Usyskin pm_runtime_autosuspend(device); 412180ea05bSTomas Winkler 413180ea05bSTomas Winkler return -EBUSY; 414180ea05bSTomas Winkler } 415180ea05bSTomas Winkler 416180ea05bSTomas Winkler static int mei_me_pm_runtime_suspend(struct device *device) 417180ea05bSTomas Winkler { 418180ea05bSTomas Winkler struct mei_device *dev; 419180ea05bSTomas Winkler int ret; 420180ea05bSTomas Winkler 421ab81f3f3SChuhong Yuan dev_dbg(device, "rpm: me: runtime suspend\n"); 422180ea05bSTomas Winkler 423ab81f3f3SChuhong Yuan dev = dev_get_drvdata(device); 424180ea05bSTomas Winkler if (!dev) 425180ea05bSTomas Winkler return -ENODEV; 426180ea05bSTomas Winkler 427180ea05bSTomas Winkler mutex_lock(&dev->device_lock); 428180ea05bSTomas Winkler 429180ea05bSTomas Winkler if (mei_write_is_idle(dev)) 4302d1995fcSAlexander Usyskin ret = mei_me_pg_enter_sync(dev); 431180ea05bSTomas Winkler else 432180ea05bSTomas Winkler ret = -EAGAIN; 433180ea05bSTomas Winkler 434180ea05bSTomas Winkler mutex_unlock(&dev->device_lock); 435180ea05bSTomas Winkler 436ab81f3f3SChuhong Yuan dev_dbg(device, "rpm: me: runtime suspend ret=%d\n", ret); 437180ea05bSTomas Winkler 43877537ad2SAlexander Usyskin if (ret && ret != -EAGAIN) 43977537ad2SAlexander Usyskin schedule_work(&dev->reset_work); 44077537ad2SAlexander Usyskin 441180ea05bSTomas Winkler return ret; 442180ea05bSTomas Winkler } 443180ea05bSTomas Winkler 444180ea05bSTomas Winkler static int mei_me_pm_runtime_resume(struct device *device) 445180ea05bSTomas Winkler { 446180ea05bSTomas Winkler struct mei_device *dev; 447180ea05bSTomas Winkler int ret; 448180ea05bSTomas Winkler 449ab81f3f3SChuhong Yuan dev_dbg(device, "rpm: me: runtime resume\n"); 450180ea05bSTomas Winkler 451ab81f3f3SChuhong Yuan dev = dev_get_drvdata(device); 452180ea05bSTomas Winkler if (!dev) 453180ea05bSTomas Winkler return -ENODEV; 454180ea05bSTomas Winkler 455180ea05bSTomas Winkler mutex_lock(&dev->device_lock); 456180ea05bSTomas Winkler 4572d1995fcSAlexander Usyskin ret = mei_me_pg_exit_sync(dev); 458180ea05bSTomas Winkler 459180ea05bSTomas Winkler mutex_unlock(&dev->device_lock); 460180ea05bSTomas Winkler 461ab81f3f3SChuhong Yuan dev_dbg(device, "rpm: me: runtime resume ret = %d\n", ret); 462180ea05bSTomas Winkler 46377537ad2SAlexander Usyskin if (ret) 46477537ad2SAlexander Usyskin schedule_work(&dev->reset_work); 46577537ad2SAlexander Usyskin 466180ea05bSTomas Winkler return ret; 467180ea05bSTomas Winkler } 468e13fa90cSTomas Winkler 469e13fa90cSTomas Winkler /** 4707efceb55SGeert Uytterhoeven * mei_me_set_pm_domain - fill and set pm domain structure for device 471e13fa90cSTomas Winkler * 472e13fa90cSTomas Winkler * @dev: mei_device 473e13fa90cSTomas Winkler */ 474e13fa90cSTomas Winkler static inline void mei_me_set_pm_domain(struct mei_device *dev) 475e13fa90cSTomas Winkler { 476d08b8fc0STomas Winkler struct pci_dev *pdev = to_pci_dev(dev->dev); 477e13fa90cSTomas Winkler 478e13fa90cSTomas Winkler if (pdev->dev.bus && pdev->dev.bus->pm) { 479e13fa90cSTomas Winkler dev->pg_domain.ops = *pdev->dev.bus->pm; 480e13fa90cSTomas Winkler 481e13fa90cSTomas Winkler dev->pg_domain.ops.runtime_suspend = mei_me_pm_runtime_suspend; 482e13fa90cSTomas Winkler dev->pg_domain.ops.runtime_resume = mei_me_pm_runtime_resume; 483e13fa90cSTomas Winkler dev->pg_domain.ops.runtime_idle = mei_me_pm_runtime_idle; 484e13fa90cSTomas Winkler 485989561deSTomeu Vizoso dev_pm_domain_set(&pdev->dev, &dev->pg_domain); 486e13fa90cSTomas Winkler } 487e13fa90cSTomas Winkler } 488e13fa90cSTomas Winkler 489e13fa90cSTomas Winkler /** 4907efceb55SGeert Uytterhoeven * mei_me_unset_pm_domain - clean pm domain structure for device 491e13fa90cSTomas Winkler * 492e13fa90cSTomas Winkler * @dev: mei_device 493e13fa90cSTomas Winkler */ 494e13fa90cSTomas Winkler static inline void mei_me_unset_pm_domain(struct mei_device *dev) 495e13fa90cSTomas Winkler { 496e13fa90cSTomas Winkler /* stop using pm callbacks if any */ 497989561deSTomeu Vizoso dev_pm_domain_set(dev->dev, NULL); 498e13fa90cSTomas Winkler } 499180ea05bSTomas Winkler 500180ea05bSTomas Winkler static const struct dev_pm_ops mei_me_pm_ops = { 501180ea05bSTomas Winkler SET_SYSTEM_SLEEP_PM_OPS(mei_me_pci_suspend, 502180ea05bSTomas Winkler mei_me_pci_resume) 503180ea05bSTomas Winkler SET_RUNTIME_PM_OPS( 504180ea05bSTomas Winkler mei_me_pm_runtime_suspend, 505180ea05bSTomas Winkler mei_me_pm_runtime_resume, 506180ea05bSTomas Winkler mei_me_pm_runtime_idle) 507180ea05bSTomas Winkler }; 508180ea05bSTomas Winkler 509b68301e9STomas Winkler #define MEI_ME_PM_OPS (&mei_me_pm_ops) 5102703d4b2STomas Winkler #else 511b68301e9STomas Winkler #define MEI_ME_PM_OPS NULL 512180ea05bSTomas Winkler #endif /* CONFIG_PM */ 5132703d4b2STomas Winkler /* 5142703d4b2STomas Winkler * PCI driver structure 5152703d4b2STomas Winkler */ 516b68301e9STomas Winkler static struct pci_driver mei_me_driver = { 5172703d4b2STomas Winkler .name = KBUILD_MODNAME, 518b68301e9STomas Winkler .id_table = mei_me_pci_tbl, 519b68301e9STomas Winkler .probe = mei_me_probe, 520b68301e9STomas Winkler .remove = mei_me_remove, 5215c4c0106STomas Winkler .shutdown = mei_me_shutdown, 522b68301e9STomas Winkler .driver.pm = MEI_ME_PM_OPS, 52367de6bf1SAlexander Usyskin .driver.probe_type = PROBE_PREFER_ASYNCHRONOUS, 5242703d4b2STomas Winkler }; 5252703d4b2STomas Winkler 526b68301e9STomas Winkler module_pci_driver(mei_me_driver); 5272703d4b2STomas Winkler 5282703d4b2STomas Winkler MODULE_AUTHOR("Intel Corporation"); 5292703d4b2STomas Winkler MODULE_DESCRIPTION("Intel(R) Management Engine Interface"); 5302703d4b2STomas Winkler MODULE_LICENSE("GPL v2"); 531