19fff0425STomas Winkler // SPDX-License-Identifier: GPL-2.0 22703d4b2STomas Winkler /* 3a27ad0f7STomas Winkler * Copyright (c) 2003-2020, 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/kernel.h> 92703d4b2STomas Winkler #include <linux/device.h> 102703d4b2STomas Winkler #include <linux/errno.h> 112703d4b2STomas Winkler #include <linux/types.h> 122703d4b2STomas Winkler #include <linux/pci.h> 132703d4b2STomas Winkler #include <linux/sched.h> 142703d4b2STomas Winkler #include <linux/interrupt.h> 152703d4b2STomas Winkler 16989561deSTomeu Vizoso #include <linux/pm_domain.h> 17180ea05bSTomas Winkler #include <linux/pm_runtime.h> 18180ea05bSTomas Winkler 192703d4b2STomas Winkler #include <linux/mei.h> 202703d4b2STomas Winkler 212703d4b2STomas Winkler #include "mei_dev.h" 222703d4b2STomas Winkler #include "client.h" 236e4cd27aSTomas Winkler #include "hw-me-regs.h" 246e4cd27aSTomas Winkler #include "hw-me.h" 252703d4b2STomas Winkler 262703d4b2STomas Winkler /* mei_pci_tbl - PCI Device ID Table */ 27a05f8f86STomas Winkler static const struct pci_device_id mei_me_pci_tbl[] = { 28f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_82946GZ, MEI_ME_ICH_CFG)}, 29f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_82G35, MEI_ME_ICH_CFG)}, 30f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_82Q965, MEI_ME_ICH_CFG)}, 31f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_82G965, MEI_ME_ICH_CFG)}, 32f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_82GM965, MEI_ME_ICH_CFG)}, 33f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_82GME965, MEI_ME_ICH_CFG)}, 34f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_ICH9_82Q35, MEI_ME_ICH_CFG)}, 35f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_ICH9_82G33, MEI_ME_ICH_CFG)}, 36f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_ICH9_82Q33, MEI_ME_ICH_CFG)}, 37f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_ICH9_82X38, MEI_ME_ICH_CFG)}, 38f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_ICH9_3200, MEI_ME_ICH_CFG)}, 398d929d48SAlexander Usyskin 40f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_ICH9_6, MEI_ME_ICH_CFG)}, 41f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_ICH9_7, MEI_ME_ICH_CFG)}, 42f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_ICH9_8, MEI_ME_ICH_CFG)}, 43f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_ICH9_9, MEI_ME_ICH_CFG)}, 44f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_ICH9_10, MEI_ME_ICH_CFG)}, 45f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_ICH9M_1, MEI_ME_ICH_CFG)}, 46f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_ICH9M_2, MEI_ME_ICH_CFG)}, 47f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_ICH9M_3, MEI_ME_ICH_CFG)}, 48f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_ICH9M_4, MEI_ME_ICH_CFG)}, 498d929d48SAlexander Usyskin 50f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_ICH10_1, MEI_ME_ICH10_CFG)}, 51f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_ICH10_2, MEI_ME_ICH10_CFG)}, 52f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_ICH10_3, MEI_ME_ICH10_CFG)}, 53f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_ICH10_4, MEI_ME_ICH10_CFG)}, 542703d4b2STomas Winkler 55f8204f0dSAlexander Usyskin {MEI_PCI_DEVICE(MEI_DEV_ID_IBXPK_1, MEI_ME_PCH6_CFG)}, 56f8204f0dSAlexander Usyskin {MEI_PCI_DEVICE(MEI_DEV_ID_IBXPK_2, MEI_ME_PCH6_CFG)}, 57f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_CPT_1, MEI_ME_PCH_CPT_PBG_CFG)}, 58f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_PBG_1, MEI_ME_PCH_CPT_PBG_CFG)}, 59f8204f0dSAlexander Usyskin {MEI_PCI_DEVICE(MEI_DEV_ID_PPT_1, MEI_ME_PCH7_CFG)}, 60f8204f0dSAlexander Usyskin {MEI_PCI_DEVICE(MEI_DEV_ID_PPT_2, MEI_ME_PCH7_CFG)}, 61f8204f0dSAlexander Usyskin {MEI_PCI_DEVICE(MEI_DEV_ID_PPT_3, MEI_ME_PCH7_CFG)}, 62f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_LPT_H, MEI_ME_PCH8_SPS_CFG)}, 63f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_LPT_W, MEI_ME_PCH8_SPS_CFG)}, 64f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_LPT_LP, MEI_ME_PCH8_CFG)}, 65f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_LPT_HR, MEI_ME_PCH8_SPS_CFG)}, 66f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_WPT_LP, MEI_ME_PCH8_CFG)}, 67f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_WPT_LP_2, MEI_ME_PCH8_CFG)}, 681625c7ecSTomas Winkler 69f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_SPT, MEI_ME_PCH8_CFG)}, 70f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_SPT_2, MEI_ME_PCH8_CFG)}, 71f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_SPT_H, MEI_ME_PCH8_SPS_CFG)}, 72f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_SPT_H_2, MEI_ME_PCH8_SPS_CFG)}, 73173436baSAlexander Usyskin {MEI_PCI_DEVICE(MEI_DEV_ID_LBG, MEI_ME_PCH12_CFG)}, 74dd16f6cdSTomas Winkler 75f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_BXT_M, MEI_ME_PCH8_CFG)}, 76f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_APL_I, MEI_ME_PCH8_CFG)}, 77f5ac3c49STomas Winkler 78f7ee8eadSTomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_DNV_IE, MEI_ME_PCH8_CFG)}, 79f7ee8eadSTomas Winkler 80688cb678STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_GLK, MEI_ME_PCH8_CFG)}, 81688cb678STomas Winkler 82f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_KBP, MEI_ME_PCH8_CFG)}, 83f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_KBP_2, MEI_ME_PCH8_CFG)}, 84ac182e8aSAlexander Usyskin 851dbfe7f2SAlexander Usyskin {MEI_PCI_DEVICE(MEI_DEV_ID_CNP_LP, MEI_ME_PCH12_CFG)}, 86c23df7deSAlexander Usyskin {MEI_PCI_DEVICE(MEI_DEV_ID_CNP_LP_3, MEI_ME_PCH8_CFG)}, 871dbfe7f2SAlexander Usyskin {MEI_PCI_DEVICE(MEI_DEV_ID_CNP_H, MEI_ME_PCH12_CFG)}, 88c23df7deSAlexander Usyskin {MEI_PCI_DEVICE(MEI_DEV_ID_CNP_H_3, MEI_ME_PCH8_CFG)}, 89f8f4aa68SAlexander Usyskin 904d86dfd3STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_CMP_LP, MEI_ME_PCH12_CFG)}, 914d86dfd3STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_CMP_LP_3, MEI_ME_PCH8_CFG)}, 9282b29b9fSAlexander Usyskin {MEI_PCI_DEVICE(MEI_DEV_ID_CMP_V, MEI_ME_PCH12_CFG)}, 93559e575aSTomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_CMP_H, MEI_ME_PCH12_CFG)}, 94559e575aSTomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_CMP_H_3, MEI_ME_PCH8_CFG)}, 954d86dfd3STomas Winkler 96efe814e9STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_ICP_LP, MEI_ME_PCH12_CFG)}, 97efe814e9STomas Winkler 9852f6efdfSAlexander Usyskin {MEI_PCI_DEVICE(MEI_DEV_ID_TGP_LP, MEI_ME_PCH15_CFG)}, 99587f1740STomas Winkler 1000db4a15dSTomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_JSP_N, MEI_ME_PCH15_CFG)}, 1010db4a15dSTomas Winkler 10252f6efdfSAlexander Usyskin {MEI_PCI_DEVICE(MEI_DEV_ID_MCC, MEI_ME_PCH15_CFG)}, 1031be8624aSAlexander Usyskin {MEI_PCI_DEVICE(MEI_DEV_ID_MCC_4, MEI_ME_PCH8_CFG)}, 1041be8624aSAlexander Usyskin 1052703d4b2STomas Winkler /* required last entry */ 1062703d4b2STomas Winkler {0, } 1072703d4b2STomas Winkler }; 1082703d4b2STomas Winkler 109b68301e9STomas Winkler MODULE_DEVICE_TABLE(pci, mei_me_pci_tbl); 1102703d4b2STomas Winkler 111bbd6d050SRafael J. Wysocki #ifdef CONFIG_PM 112e13fa90cSTomas Winkler static inline void mei_me_set_pm_domain(struct mei_device *dev); 113e13fa90cSTomas Winkler static inline void mei_me_unset_pm_domain(struct mei_device *dev); 114e13fa90cSTomas Winkler #else 115e13fa90cSTomas Winkler static inline void mei_me_set_pm_domain(struct mei_device *dev) {} 116e13fa90cSTomas Winkler static inline void mei_me_unset_pm_domain(struct mei_device *dev) {} 117bbd6d050SRafael J. Wysocki #endif /* CONFIG_PM */ 118e13fa90cSTomas Winkler 119261e071aSTomas Winkler static int mei_me_read_fws(const struct mei_device *dev, int where, u32 *val) 120261e071aSTomas Winkler { 121261e071aSTomas Winkler struct pci_dev *pdev = to_pci_dev(dev->dev); 122261e071aSTomas Winkler 123261e071aSTomas Winkler return pci_read_config_dword(pdev, where, val); 124261e071aSTomas Winkler } 125261e071aSTomas Winkler 1262703d4b2STomas Winkler /** 127ce23139cSAlexander Usyskin * mei_me_quirk_probe - probe for devices that doesn't valid ME interface 128393b148fSMasanari Iida * 1292703d4b2STomas Winkler * @pdev: PCI device structure 130c919951dSTomas Winkler * @cfg: per generation config 1312703d4b2STomas Winkler * 132a8605ea2SAlexander Usyskin * Return: true if ME Interface is valid, false otherwise 1332703d4b2STomas Winkler */ 134b68301e9STomas Winkler static bool mei_me_quirk_probe(struct pci_dev *pdev, 135c919951dSTomas Winkler const struct mei_cfg *cfg) 1362703d4b2STomas Winkler { 137c919951dSTomas Winkler if (cfg->quirk_probe && cfg->quirk_probe(pdev)) { 1382703d4b2STomas Winkler dev_info(&pdev->dev, "Device doesn't have valid ME Interface\n"); 1392703d4b2STomas Winkler return false; 1402703d4b2STomas Winkler } 141c919951dSTomas Winkler 142c919951dSTomas Winkler return true; 143c919951dSTomas Winkler } 144c919951dSTomas Winkler 1452703d4b2STomas Winkler /** 146ce23139cSAlexander Usyskin * mei_me_probe - Device Initialization Routine 1472703d4b2STomas Winkler * 1482703d4b2STomas Winkler * @pdev: PCI device structure 1492703d4b2STomas Winkler * @ent: entry in kcs_pci_tbl 1502703d4b2STomas Winkler * 151a8605ea2SAlexander Usyskin * Return: 0 on success, <0 on failure. 1522703d4b2STomas Winkler */ 153b68301e9STomas Winkler static int mei_me_probe(struct pci_dev *pdev, const struct pci_device_id *ent) 1542703d4b2STomas Winkler { 155f5ac3c49STomas Winkler const struct mei_cfg *cfg; 1562703d4b2STomas Winkler struct mei_device *dev; 15752c34561STomas Winkler struct mei_me_hw *hw; 1581fa55b4eSAlexander Usyskin unsigned int irqflags; 1592703d4b2STomas Winkler int err; 1602703d4b2STomas Winkler 161f5ac3c49STomas Winkler cfg = mei_me_get_cfg(ent->driver_data); 162f5ac3c49STomas Winkler if (!cfg) 163f5ac3c49STomas Winkler return -ENODEV; 1642703d4b2STomas Winkler 165c919951dSTomas Winkler if (!mei_me_quirk_probe(pdev, cfg)) 166c919951dSTomas Winkler return -ENODEV; 1672703d4b2STomas Winkler 1682703d4b2STomas Winkler /* enable pci dev */ 169f8a09605STomas Winkler err = pcim_enable_device(pdev); 1702703d4b2STomas Winkler if (err) { 1712703d4b2STomas Winkler dev_err(&pdev->dev, "failed to enable pci device.\n"); 1722703d4b2STomas Winkler goto end; 1732703d4b2STomas Winkler } 1742703d4b2STomas Winkler /* set PCI host mastering */ 1752703d4b2STomas Winkler pci_set_master(pdev); 176f8a09605STomas Winkler /* pci request regions and mapping IO device memory for mei driver */ 177f8a09605STomas Winkler err = pcim_iomap_regions(pdev, BIT(0), KBUILD_MODNAME); 1782703d4b2STomas Winkler if (err) { 1792703d4b2STomas Winkler dev_err(&pdev->dev, "failed to get pci regions.\n"); 180f8a09605STomas Winkler goto end; 1812703d4b2STomas Winkler } 1823ecfb168STomas Winkler 1833ecfb168STomas Winkler if (dma_set_mask(&pdev->dev, DMA_BIT_MASK(64)) || 1843ecfb168STomas Winkler dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64))) { 1853ecfb168STomas Winkler 1863ecfb168STomas Winkler err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32)); 1873ecfb168STomas Winkler if (err) 1883ecfb168STomas Winkler err = dma_set_coherent_mask(&pdev->dev, 1893ecfb168STomas Winkler DMA_BIT_MASK(32)); 1903ecfb168STomas Winkler } 1913ecfb168STomas Winkler if (err) { 1923ecfb168STomas Winkler dev_err(&pdev->dev, "No usable DMA configuration, aborting\n"); 193f8a09605STomas Winkler goto end; 1943ecfb168STomas Winkler } 1953ecfb168STomas Winkler 1962703d4b2STomas Winkler /* allocates and initializes the mei dev structure */ 197907b471cSTomas Winkler dev = mei_me_dev_init(&pdev->dev, cfg); 1982703d4b2STomas Winkler if (!dev) { 1992703d4b2STomas Winkler err = -ENOMEM; 200f8a09605STomas Winkler goto end; 2012703d4b2STomas Winkler } 20252c34561STomas Winkler hw = to_me_hw(dev); 203f8a09605STomas Winkler hw->mem_addr = pcim_iomap_table(pdev)[0]; 204261b3e1fSAlexander Usyskin hw->irq = pdev->irq; 205261e071aSTomas Winkler hw->read_fws = mei_me_read_fws; 206f8a09605STomas Winkler 2072703d4b2STomas Winkler pci_enable_msi(pdev); 2082703d4b2STomas Winkler 2092703d4b2STomas Winkler /* request and enable interrupt */ 2101fa55b4eSAlexander Usyskin irqflags = pci_dev_msi_enabled(pdev) ? IRQF_ONESHOT : IRQF_SHARED; 2111fa55b4eSAlexander Usyskin 2122703d4b2STomas Winkler err = request_threaded_irq(pdev->irq, 21306ecd645STomas Winkler mei_me_irq_quick_handler, 21406ecd645STomas Winkler mei_me_irq_thread_handler, 2151fa55b4eSAlexander Usyskin irqflags, KBUILD_MODNAME, dev); 2162703d4b2STomas Winkler if (err) { 2172703d4b2STomas Winkler dev_err(&pdev->dev, "request_threaded_irq failure. irq = %d\n", 2182703d4b2STomas Winkler pdev->irq); 219f8a09605STomas Winkler goto end; 2202703d4b2STomas Winkler } 2212703d4b2STomas Winkler 222c4d589beSTomas Winkler if (mei_start(dev)) { 2232703d4b2STomas Winkler dev_err(&pdev->dev, "init hw failure.\n"); 2242703d4b2STomas Winkler err = -ENODEV; 2252703d4b2STomas Winkler goto release_irq; 2262703d4b2STomas Winkler } 2272703d4b2STomas Winkler 228180ea05bSTomas Winkler pm_runtime_set_autosuspend_delay(&pdev->dev, MEI_ME_RPM_TIMEOUT); 229180ea05bSTomas Winkler pm_runtime_use_autosuspend(&pdev->dev); 230180ea05bSTomas Winkler 231f3d8e878SAlexander Usyskin err = mei_register(dev, &pdev->dev); 2322703d4b2STomas Winkler if (err) 2331f7e489aSAlexander Usyskin goto stop; 2342703d4b2STomas Winkler 2352703d4b2STomas Winkler pci_set_drvdata(pdev, dev); 2362703d4b2STomas Winkler 237e13fa90cSTomas Winkler /* 238557909e1SAlexander Usyskin * MEI requires to resume from runtime suspend mode 239557909e1SAlexander Usyskin * in order to perform link reset flow upon system suspend. 240557909e1SAlexander Usyskin */ 241c2eac4d3SRafael J. Wysocki dev_pm_set_driver_flags(&pdev->dev, DPM_FLAG_NEVER_SKIP); 242557909e1SAlexander Usyskin 243557909e1SAlexander Usyskin /* 244b42dc063SAlexander Usyskin * ME maps runtime suspend/resume to D0i states, 245b42dc063SAlexander Usyskin * hence we need to go around native PCI runtime service which 246b42dc063SAlexander Usyskin * eventually brings the device into D3cold/hot state, 247b42dc063SAlexander Usyskin * but the mei device cannot wake up from D3 unlike from D0i3. 248b42dc063SAlexander Usyskin * To get around the PCI device native runtime pm, 249b42dc063SAlexander Usyskin * ME uses runtime pm domain handlers which take precedence 250b42dc063SAlexander Usyskin * over the driver's pm handlers. 251e13fa90cSTomas Winkler */ 252e13fa90cSTomas Winkler mei_me_set_pm_domain(dev); 253e13fa90cSTomas Winkler 254cc365dcfSTomas Winkler if (mei_pg_is_enabled(dev)) { 255180ea05bSTomas Winkler pm_runtime_put_noidle(&pdev->dev); 256cc365dcfSTomas Winkler if (hw->d0i3_supported) 257cc365dcfSTomas Winkler pm_runtime_allow(&pdev->dev); 258cc365dcfSTomas Winkler } 259180ea05bSTomas Winkler 260c4e87b52SAlexander Usyskin dev_dbg(&pdev->dev, "initialization successful.\n"); 2612703d4b2STomas Winkler 2622703d4b2STomas Winkler return 0; 2632703d4b2STomas Winkler 2641f7e489aSAlexander Usyskin stop: 2651f7e489aSAlexander Usyskin mei_stop(dev); 2662703d4b2STomas Winkler release_irq: 267dc844b0dSTomas Winkler mei_cancel_work(dev); 2682703d4b2STomas Winkler mei_disable_interrupts(dev); 2692703d4b2STomas Winkler free_irq(pdev->irq, dev); 2702703d4b2STomas Winkler end: 2712703d4b2STomas Winkler dev_err(&pdev->dev, "initialization failed.\n"); 2722703d4b2STomas Winkler return err; 2732703d4b2STomas Winkler } 2742703d4b2STomas Winkler 2752703d4b2STomas Winkler /** 2765c4c0106STomas Winkler * mei_me_shutdown - Device Removal Routine 2775c4c0106STomas Winkler * 2785c4c0106STomas Winkler * @pdev: PCI device structure 2795c4c0106STomas Winkler * 2805c4c0106STomas Winkler * mei_me_shutdown is called from the reboot notifier 2815c4c0106STomas Winkler * it's a simplified version of remove so we go down 2825c4c0106STomas Winkler * faster. 2835c4c0106STomas Winkler */ 2845c4c0106STomas Winkler static void mei_me_shutdown(struct pci_dev *pdev) 2855c4c0106STomas Winkler { 2865c4c0106STomas Winkler struct mei_device *dev; 2875c4c0106STomas Winkler 2885c4c0106STomas Winkler dev = pci_get_drvdata(pdev); 2895c4c0106STomas Winkler if (!dev) 2905c4c0106STomas Winkler return; 2915c4c0106STomas Winkler 2925c4c0106STomas Winkler dev_dbg(&pdev->dev, "shutdown\n"); 2935c4c0106STomas Winkler mei_stop(dev); 2945c4c0106STomas Winkler 2955c4c0106STomas Winkler mei_me_unset_pm_domain(dev); 2965c4c0106STomas Winkler 2975c4c0106STomas Winkler mei_disable_interrupts(dev); 2985c4c0106STomas Winkler free_irq(pdev->irq, dev); 2995c4c0106STomas Winkler } 3005c4c0106STomas Winkler 3015c4c0106STomas Winkler /** 302ce23139cSAlexander Usyskin * mei_me_remove - Device Removal Routine 3032703d4b2STomas Winkler * 3042703d4b2STomas Winkler * @pdev: PCI device structure 3052703d4b2STomas Winkler * 3065c4c0106STomas Winkler * mei_me_remove is called by the PCI subsystem to alert the driver 3072703d4b2STomas Winkler * that it should release a PCI device. 3082703d4b2STomas Winkler */ 309b68301e9STomas Winkler static void mei_me_remove(struct pci_dev *pdev) 3102703d4b2STomas Winkler { 3112703d4b2STomas Winkler struct mei_device *dev; 3122703d4b2STomas Winkler 3132703d4b2STomas Winkler dev = pci_get_drvdata(pdev); 3142703d4b2STomas Winkler if (!dev) 3152703d4b2STomas Winkler return; 3162703d4b2STomas Winkler 317180ea05bSTomas Winkler if (mei_pg_is_enabled(dev)) 318180ea05bSTomas Winkler pm_runtime_get_noresume(&pdev->dev); 319180ea05bSTomas Winkler 320ed6f7ac1SPaul Bolle dev_dbg(&pdev->dev, "stop\n"); 3217cb035d9STomas Winkler mei_stop(dev); 3222703d4b2STomas Winkler 323e13fa90cSTomas Winkler mei_me_unset_pm_domain(dev); 324e13fa90cSTomas Winkler 3252703d4b2STomas Winkler mei_disable_interrupts(dev); 3262703d4b2STomas Winkler 3272703d4b2STomas Winkler free_irq(pdev->irq, dev); 3282703d4b2STomas Winkler 32930e53bb8STomas Winkler mei_deregister(dev); 3302703d4b2STomas Winkler } 331f8a09605STomas Winkler 33216833257SAlexander Usyskin #ifdef CONFIG_PM_SLEEP 333b68301e9STomas Winkler static int mei_me_pci_suspend(struct device *device) 3342703d4b2STomas Winkler { 3352703d4b2STomas Winkler struct pci_dev *pdev = to_pci_dev(device); 3362703d4b2STomas Winkler struct mei_device *dev = pci_get_drvdata(pdev); 3372703d4b2STomas Winkler 3382703d4b2STomas Winkler if (!dev) 3392703d4b2STomas Winkler return -ENODEV; 3402703d4b2STomas Winkler 341ed6f7ac1SPaul Bolle dev_dbg(&pdev->dev, "suspend\n"); 3422703d4b2STomas Winkler 3437cb035d9STomas Winkler mei_stop(dev); 3447cb035d9STomas Winkler 3457cb035d9STomas Winkler mei_disable_interrupts(dev); 3462703d4b2STomas Winkler 3472703d4b2STomas Winkler free_irq(pdev->irq, dev); 3482703d4b2STomas Winkler pci_disable_msi(pdev); 3492703d4b2STomas Winkler 3507cb035d9STomas Winkler return 0; 3512703d4b2STomas Winkler } 3522703d4b2STomas Winkler 353b68301e9STomas Winkler static int mei_me_pci_resume(struct device *device) 3542703d4b2STomas Winkler { 3552703d4b2STomas Winkler struct pci_dev *pdev = to_pci_dev(device); 3562703d4b2STomas Winkler struct mei_device *dev; 3571fa55b4eSAlexander Usyskin unsigned int irqflags; 3582703d4b2STomas Winkler int err; 3592703d4b2STomas Winkler 3602703d4b2STomas Winkler dev = pci_get_drvdata(pdev); 3612703d4b2STomas Winkler if (!dev) 3622703d4b2STomas Winkler return -ENODEV; 3632703d4b2STomas Winkler 3642703d4b2STomas Winkler pci_enable_msi(pdev); 3652703d4b2STomas Winkler 3661fa55b4eSAlexander Usyskin irqflags = pci_dev_msi_enabled(pdev) ? IRQF_ONESHOT : IRQF_SHARED; 3671fa55b4eSAlexander Usyskin 3682703d4b2STomas Winkler /* request and enable interrupt */ 3692703d4b2STomas Winkler err = request_threaded_irq(pdev->irq, 37006ecd645STomas Winkler mei_me_irq_quick_handler, 37106ecd645STomas Winkler mei_me_irq_thread_handler, 3721fa55b4eSAlexander Usyskin irqflags, KBUILD_MODNAME, dev); 3732703d4b2STomas Winkler 3742703d4b2STomas Winkler if (err) { 3752703d4b2STomas Winkler dev_err(&pdev->dev, "request_threaded_irq failed: irq = %d.\n", 3762703d4b2STomas Winkler pdev->irq); 3772703d4b2STomas Winkler return err; 3782703d4b2STomas Winkler } 3792703d4b2STomas Winkler 38033ec0826STomas Winkler err = mei_restart(dev); 38133ec0826STomas Winkler if (err) 38233ec0826STomas Winkler return err; 3832703d4b2STomas Winkler 3842703d4b2STomas Winkler /* Start timer if stopped in suspend */ 3852703d4b2STomas Winkler schedule_delayed_work(&dev->timer_work, HZ); 3862703d4b2STomas Winkler 38733ec0826STomas Winkler return 0; 3882703d4b2STomas Winkler } 389180ea05bSTomas Winkler #endif /* CONFIG_PM_SLEEP */ 39016833257SAlexander Usyskin 391bbd6d050SRafael J. Wysocki #ifdef CONFIG_PM 392180ea05bSTomas Winkler static int mei_me_pm_runtime_idle(struct device *device) 393180ea05bSTomas Winkler { 394180ea05bSTomas Winkler struct mei_device *dev; 395180ea05bSTomas Winkler 396ab81f3f3SChuhong Yuan dev_dbg(device, "rpm: me: runtime_idle\n"); 397180ea05bSTomas Winkler 398ab81f3f3SChuhong Yuan dev = dev_get_drvdata(device); 399180ea05bSTomas Winkler if (!dev) 400180ea05bSTomas Winkler return -ENODEV; 401180ea05bSTomas Winkler if (mei_write_is_idle(dev)) 402d5d83f8aSAlexander Usyskin pm_runtime_autosuspend(device); 403180ea05bSTomas Winkler 404180ea05bSTomas Winkler return -EBUSY; 405180ea05bSTomas Winkler } 406180ea05bSTomas Winkler 407180ea05bSTomas Winkler static int mei_me_pm_runtime_suspend(struct device *device) 408180ea05bSTomas Winkler { 409180ea05bSTomas Winkler struct mei_device *dev; 410180ea05bSTomas Winkler int ret; 411180ea05bSTomas Winkler 412ab81f3f3SChuhong Yuan dev_dbg(device, "rpm: me: runtime suspend\n"); 413180ea05bSTomas Winkler 414ab81f3f3SChuhong Yuan dev = dev_get_drvdata(device); 415180ea05bSTomas Winkler if (!dev) 416180ea05bSTomas Winkler return -ENODEV; 417180ea05bSTomas Winkler 418180ea05bSTomas Winkler mutex_lock(&dev->device_lock); 419180ea05bSTomas Winkler 420180ea05bSTomas Winkler if (mei_write_is_idle(dev)) 4212d1995fcSAlexander Usyskin ret = mei_me_pg_enter_sync(dev); 422180ea05bSTomas Winkler else 423180ea05bSTomas Winkler ret = -EAGAIN; 424180ea05bSTomas Winkler 425180ea05bSTomas Winkler mutex_unlock(&dev->device_lock); 426180ea05bSTomas Winkler 427ab81f3f3SChuhong Yuan dev_dbg(device, "rpm: me: runtime suspend ret=%d\n", ret); 428180ea05bSTomas Winkler 42977537ad2SAlexander Usyskin if (ret && ret != -EAGAIN) 43077537ad2SAlexander Usyskin schedule_work(&dev->reset_work); 43177537ad2SAlexander Usyskin 432180ea05bSTomas Winkler return ret; 433180ea05bSTomas Winkler } 434180ea05bSTomas Winkler 435180ea05bSTomas Winkler static int mei_me_pm_runtime_resume(struct device *device) 436180ea05bSTomas Winkler { 437180ea05bSTomas Winkler struct mei_device *dev; 438180ea05bSTomas Winkler int ret; 439180ea05bSTomas Winkler 440ab81f3f3SChuhong Yuan dev_dbg(device, "rpm: me: runtime resume\n"); 441180ea05bSTomas Winkler 442ab81f3f3SChuhong Yuan dev = dev_get_drvdata(device); 443180ea05bSTomas Winkler if (!dev) 444180ea05bSTomas Winkler return -ENODEV; 445180ea05bSTomas Winkler 446180ea05bSTomas Winkler mutex_lock(&dev->device_lock); 447180ea05bSTomas Winkler 4482d1995fcSAlexander Usyskin ret = mei_me_pg_exit_sync(dev); 449180ea05bSTomas Winkler 450180ea05bSTomas Winkler mutex_unlock(&dev->device_lock); 451180ea05bSTomas Winkler 452ab81f3f3SChuhong Yuan dev_dbg(device, "rpm: me: runtime resume ret = %d\n", ret); 453180ea05bSTomas Winkler 45477537ad2SAlexander Usyskin if (ret) 45577537ad2SAlexander Usyskin schedule_work(&dev->reset_work); 45677537ad2SAlexander Usyskin 457180ea05bSTomas Winkler return ret; 458180ea05bSTomas Winkler } 459e13fa90cSTomas Winkler 460e13fa90cSTomas Winkler /** 4617efceb55SGeert Uytterhoeven * mei_me_set_pm_domain - fill and set pm domain structure for device 462e13fa90cSTomas Winkler * 463e13fa90cSTomas Winkler * @dev: mei_device 464e13fa90cSTomas Winkler */ 465e13fa90cSTomas Winkler static inline void mei_me_set_pm_domain(struct mei_device *dev) 466e13fa90cSTomas Winkler { 467d08b8fc0STomas Winkler struct pci_dev *pdev = to_pci_dev(dev->dev); 468e13fa90cSTomas Winkler 469e13fa90cSTomas Winkler if (pdev->dev.bus && pdev->dev.bus->pm) { 470e13fa90cSTomas Winkler dev->pg_domain.ops = *pdev->dev.bus->pm; 471e13fa90cSTomas Winkler 472e13fa90cSTomas Winkler dev->pg_domain.ops.runtime_suspend = mei_me_pm_runtime_suspend; 473e13fa90cSTomas Winkler dev->pg_domain.ops.runtime_resume = mei_me_pm_runtime_resume; 474e13fa90cSTomas Winkler dev->pg_domain.ops.runtime_idle = mei_me_pm_runtime_idle; 475e13fa90cSTomas Winkler 476989561deSTomeu Vizoso dev_pm_domain_set(&pdev->dev, &dev->pg_domain); 477e13fa90cSTomas Winkler } 478e13fa90cSTomas Winkler } 479e13fa90cSTomas Winkler 480e13fa90cSTomas Winkler /** 4817efceb55SGeert Uytterhoeven * mei_me_unset_pm_domain - clean pm domain structure for device 482e13fa90cSTomas Winkler * 483e13fa90cSTomas Winkler * @dev: mei_device 484e13fa90cSTomas Winkler */ 485e13fa90cSTomas Winkler static inline void mei_me_unset_pm_domain(struct mei_device *dev) 486e13fa90cSTomas Winkler { 487e13fa90cSTomas Winkler /* stop using pm callbacks if any */ 488989561deSTomeu Vizoso dev_pm_domain_set(dev->dev, NULL); 489e13fa90cSTomas Winkler } 490180ea05bSTomas Winkler 491180ea05bSTomas Winkler static const struct dev_pm_ops mei_me_pm_ops = { 492180ea05bSTomas Winkler SET_SYSTEM_SLEEP_PM_OPS(mei_me_pci_suspend, 493180ea05bSTomas Winkler mei_me_pci_resume) 494180ea05bSTomas Winkler SET_RUNTIME_PM_OPS( 495180ea05bSTomas Winkler mei_me_pm_runtime_suspend, 496180ea05bSTomas Winkler mei_me_pm_runtime_resume, 497180ea05bSTomas Winkler mei_me_pm_runtime_idle) 498180ea05bSTomas Winkler }; 499180ea05bSTomas Winkler 500b68301e9STomas Winkler #define MEI_ME_PM_OPS (&mei_me_pm_ops) 5012703d4b2STomas Winkler #else 502b68301e9STomas Winkler #define MEI_ME_PM_OPS NULL 503180ea05bSTomas Winkler #endif /* CONFIG_PM */ 5042703d4b2STomas Winkler /* 5052703d4b2STomas Winkler * PCI driver structure 5062703d4b2STomas Winkler */ 507b68301e9STomas Winkler static struct pci_driver mei_me_driver = { 5082703d4b2STomas Winkler .name = KBUILD_MODNAME, 509b68301e9STomas Winkler .id_table = mei_me_pci_tbl, 510b68301e9STomas Winkler .probe = mei_me_probe, 511b68301e9STomas Winkler .remove = mei_me_remove, 5125c4c0106STomas Winkler .shutdown = mei_me_shutdown, 513b68301e9STomas Winkler .driver.pm = MEI_ME_PM_OPS, 51467de6bf1SAlexander Usyskin .driver.probe_type = PROBE_PREFER_ASYNCHRONOUS, 5152703d4b2STomas Winkler }; 5162703d4b2STomas Winkler 517b68301e9STomas Winkler module_pci_driver(mei_me_driver); 5182703d4b2STomas Winkler 5192703d4b2STomas Winkler MODULE_AUTHOR("Intel Corporation"); 5202703d4b2STomas Winkler MODULE_DESCRIPTION("Intel(R) Management Engine Interface"); 5212703d4b2STomas Winkler MODULE_LICENSE("GPL v2"); 522