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)}, 62f76d77f5STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_LPT_H, MEI_ME_PCH8_SPS_4_CFG)}, 63f76d77f5STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_LPT_W, MEI_ME_PCH8_SPS_4_CFG)}, 64f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_LPT_LP, MEI_ME_PCH8_CFG)}, 65f76d77f5STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_LPT_HR, MEI_ME_PCH8_SPS_4_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)}, 712f79d3d1SAlexander Usyskin {MEI_PCI_DEVICE(MEI_DEV_ID_SPT_3, MEI_ME_PCH8_ITOUCH_CFG)}, 72f76d77f5STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_SPT_H, MEI_ME_PCH8_SPS_4_CFG)}, 73f76d77f5STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_SPT_H_2, MEI_ME_PCH8_SPS_4_CFG)}, 74f76d77f5STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_LBG, MEI_ME_PCH12_SPS_4_CFG)}, 75dd16f6cdSTomas Winkler 76f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_BXT_M, MEI_ME_PCH8_CFG)}, 77f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_APL_I, MEI_ME_PCH8_CFG)}, 78f5ac3c49STomas Winkler 79f7ee8eadSTomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_DNV_IE, MEI_ME_PCH8_CFG)}, 80f7ee8eadSTomas Winkler 81688cb678STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_GLK, MEI_ME_PCH8_CFG)}, 82688cb678STomas Winkler 83f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_KBP, MEI_ME_PCH8_CFG)}, 84f5ac3c49STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_KBP_2, MEI_ME_PCH8_CFG)}, 854afc339eSTomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_KBP_3, MEI_ME_PCH8_CFG)}, 86ac182e8aSAlexander Usyskin 871dbfe7f2SAlexander Usyskin {MEI_PCI_DEVICE(MEI_DEV_ID_CNP_LP, MEI_ME_PCH12_CFG)}, 882f79d3d1SAlexander Usyskin {MEI_PCI_DEVICE(MEI_DEV_ID_CNP_LP_3, MEI_ME_PCH8_ITOUCH_CFG)}, 89f76d77f5STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_CNP_H, MEI_ME_PCH12_SPS_CFG)}, 902f79d3d1SAlexander Usyskin {MEI_PCI_DEVICE(MEI_DEV_ID_CNP_H_3, MEI_ME_PCH12_SPS_ITOUCH_CFG)}, 91f8f4aa68SAlexander Usyskin 924d86dfd3STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_CMP_LP, MEI_ME_PCH12_CFG)}, 932f79d3d1SAlexander Usyskin {MEI_PCI_DEVICE(MEI_DEV_ID_CMP_LP_3, MEI_ME_PCH8_ITOUCH_CFG)}, 9482b29b9fSAlexander Usyskin {MEI_PCI_DEVICE(MEI_DEV_ID_CMP_V, MEI_ME_PCH12_CFG)}, 95559e575aSTomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_CMP_H, MEI_ME_PCH12_CFG)}, 962f79d3d1SAlexander Usyskin {MEI_PCI_DEVICE(MEI_DEV_ID_CMP_H_3, MEI_ME_PCH8_ITOUCH_CFG)}, 974d86dfd3STomas Winkler 98efe814e9STomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_ICP_LP, MEI_ME_PCH12_CFG)}, 99efe814e9STomas Winkler 10052f6efdfSAlexander Usyskin {MEI_PCI_DEVICE(MEI_DEV_ID_TGP_LP, MEI_ME_PCH15_CFG)}, 1018c289ea0SAlexander Usyskin {MEI_PCI_DEVICE(MEI_DEV_ID_TGP_H, MEI_ME_PCH15_SPS_CFG)}, 102587f1740STomas Winkler 1030db4a15dSTomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_JSP_N, MEI_ME_PCH15_CFG)}, 1040db4a15dSTomas Winkler 10552f6efdfSAlexander Usyskin {MEI_PCI_DEVICE(MEI_DEV_ID_MCC, MEI_ME_PCH15_CFG)}, 1061be8624aSAlexander Usyskin {MEI_PCI_DEVICE(MEI_DEV_ID_MCC_4, MEI_ME_PCH8_CFG)}, 1071be8624aSAlexander Usyskin 10899397d33SAlexander Usyskin {MEI_PCI_DEVICE(MEI_DEV_ID_CDF, MEI_ME_PCH8_CFG)}, 10999397d33SAlexander Usyskin 110372726cbSTomas Winkler {MEI_PCI_DEVICE(MEI_DEV_ID_EBG, MEI_ME_PCH15_SPS_CFG)}, 111372726cbSTomas Winkler 112f7545efaSAlexander Usyskin {MEI_PCI_DEVICE(MEI_DEV_ID_ADP_S, MEI_ME_PCH15_CFG)}, 113*930c922aSAlexander Usyskin {MEI_PCI_DEVICE(MEI_DEV_ID_ADP_LP, MEI_ME_PCH15_CFG)}, 114f7545efaSAlexander Usyskin 1152703d4b2STomas Winkler /* required last entry */ 1162703d4b2STomas Winkler {0, } 1172703d4b2STomas Winkler }; 1182703d4b2STomas Winkler 119b68301e9STomas Winkler MODULE_DEVICE_TABLE(pci, mei_me_pci_tbl); 1202703d4b2STomas Winkler 121bbd6d050SRafael J. Wysocki #ifdef CONFIG_PM 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); 124e13fa90cSTomas Winkler #else 125e13fa90cSTomas Winkler static inline void mei_me_set_pm_domain(struct mei_device *dev) {} 126e13fa90cSTomas Winkler static inline void mei_me_unset_pm_domain(struct mei_device *dev) {} 127bbd6d050SRafael J. Wysocki #endif /* CONFIG_PM */ 128e13fa90cSTomas Winkler 129261e071aSTomas Winkler static int mei_me_read_fws(const struct mei_device *dev, int where, u32 *val) 130261e071aSTomas Winkler { 131261e071aSTomas Winkler struct pci_dev *pdev = to_pci_dev(dev->dev); 132261e071aSTomas Winkler 133261e071aSTomas Winkler return pci_read_config_dword(pdev, where, val); 134261e071aSTomas Winkler } 135261e071aSTomas Winkler 1362703d4b2STomas Winkler /** 137ce23139cSAlexander Usyskin * mei_me_quirk_probe - probe for devices that doesn't valid ME interface 138393b148fSMasanari Iida * 1392703d4b2STomas Winkler * @pdev: PCI device structure 140c919951dSTomas Winkler * @cfg: per generation config 1412703d4b2STomas Winkler * 142a8605ea2SAlexander Usyskin * Return: true if ME Interface is valid, false otherwise 1432703d4b2STomas Winkler */ 144b68301e9STomas Winkler static bool mei_me_quirk_probe(struct pci_dev *pdev, 145c919951dSTomas Winkler const struct mei_cfg *cfg) 1462703d4b2STomas Winkler { 147c919951dSTomas Winkler if (cfg->quirk_probe && cfg->quirk_probe(pdev)) { 1482703d4b2STomas Winkler dev_info(&pdev->dev, "Device doesn't have valid ME Interface\n"); 1492703d4b2STomas Winkler return false; 1502703d4b2STomas Winkler } 151c919951dSTomas Winkler 152c919951dSTomas Winkler return true; 153c919951dSTomas Winkler } 154c919951dSTomas Winkler 1552703d4b2STomas Winkler /** 156ce23139cSAlexander Usyskin * mei_me_probe - Device Initialization Routine 1572703d4b2STomas Winkler * 1582703d4b2STomas Winkler * @pdev: PCI device structure 1592703d4b2STomas Winkler * @ent: entry in kcs_pci_tbl 1602703d4b2STomas Winkler * 161a8605ea2SAlexander Usyskin * Return: 0 on success, <0 on failure. 1622703d4b2STomas Winkler */ 163b68301e9STomas Winkler static int mei_me_probe(struct pci_dev *pdev, const struct pci_device_id *ent) 1642703d4b2STomas Winkler { 165f5ac3c49STomas Winkler const struct mei_cfg *cfg; 1662703d4b2STomas Winkler struct mei_device *dev; 16752c34561STomas Winkler struct mei_me_hw *hw; 1681fa55b4eSAlexander Usyskin unsigned int irqflags; 1692703d4b2STomas Winkler int err; 1702703d4b2STomas Winkler 171f5ac3c49STomas Winkler cfg = mei_me_get_cfg(ent->driver_data); 172f5ac3c49STomas Winkler if (!cfg) 173f5ac3c49STomas Winkler return -ENODEV; 1742703d4b2STomas Winkler 175c919951dSTomas Winkler if (!mei_me_quirk_probe(pdev, cfg)) 176c919951dSTomas Winkler return -ENODEV; 1772703d4b2STomas Winkler 1782703d4b2STomas Winkler /* enable pci dev */ 179f8a09605STomas Winkler err = pcim_enable_device(pdev); 1802703d4b2STomas Winkler if (err) { 1812703d4b2STomas Winkler dev_err(&pdev->dev, "failed to enable pci device.\n"); 1822703d4b2STomas Winkler goto end; 1832703d4b2STomas Winkler } 1842703d4b2STomas Winkler /* set PCI host mastering */ 1852703d4b2STomas Winkler pci_set_master(pdev); 186f8a09605STomas Winkler /* pci request regions and mapping IO device memory for mei driver */ 187f8a09605STomas Winkler err = pcim_iomap_regions(pdev, BIT(0), KBUILD_MODNAME); 1882703d4b2STomas Winkler if (err) { 1892703d4b2STomas Winkler dev_err(&pdev->dev, "failed to get pci regions.\n"); 190f8a09605STomas Winkler goto end; 1912703d4b2STomas Winkler } 1923ecfb168STomas Winkler 1933ecfb168STomas Winkler if (dma_set_mask(&pdev->dev, DMA_BIT_MASK(64)) || 1943ecfb168STomas Winkler dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64))) { 1953ecfb168STomas Winkler 1963ecfb168STomas Winkler err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32)); 1973ecfb168STomas Winkler if (err) 1983ecfb168STomas Winkler err = dma_set_coherent_mask(&pdev->dev, 1993ecfb168STomas Winkler DMA_BIT_MASK(32)); 2003ecfb168STomas Winkler } 2013ecfb168STomas Winkler if (err) { 2023ecfb168STomas Winkler dev_err(&pdev->dev, "No usable DMA configuration, aborting\n"); 203f8a09605STomas Winkler goto end; 2043ecfb168STomas Winkler } 2053ecfb168STomas Winkler 2062703d4b2STomas Winkler /* allocates and initializes the mei dev structure */ 207907b471cSTomas Winkler dev = mei_me_dev_init(&pdev->dev, cfg); 2082703d4b2STomas Winkler if (!dev) { 2092703d4b2STomas Winkler err = -ENOMEM; 210f8a09605STomas Winkler goto end; 2112703d4b2STomas Winkler } 21252c34561STomas Winkler hw = to_me_hw(dev); 213f8a09605STomas Winkler hw->mem_addr = pcim_iomap_table(pdev)[0]; 214261e071aSTomas Winkler hw->read_fws = mei_me_read_fws; 215f8a09605STomas Winkler 2162703d4b2STomas Winkler pci_enable_msi(pdev); 2172703d4b2STomas Winkler 218fec874a8SBenjamin Lee hw->irq = pdev->irq; 219fec874a8SBenjamin Lee 2202703d4b2STomas Winkler /* request and enable interrupt */ 2211fa55b4eSAlexander Usyskin irqflags = pci_dev_msi_enabled(pdev) ? IRQF_ONESHOT : IRQF_SHARED; 2221fa55b4eSAlexander Usyskin 2232703d4b2STomas Winkler err = request_threaded_irq(pdev->irq, 22406ecd645STomas Winkler mei_me_irq_quick_handler, 22506ecd645STomas Winkler mei_me_irq_thread_handler, 2261fa55b4eSAlexander Usyskin irqflags, KBUILD_MODNAME, dev); 2272703d4b2STomas Winkler if (err) { 2282703d4b2STomas Winkler dev_err(&pdev->dev, "request_threaded_irq failure. irq = %d\n", 2292703d4b2STomas Winkler pdev->irq); 230f8a09605STomas Winkler goto end; 2312703d4b2STomas Winkler } 2322703d4b2STomas Winkler 233c4d589beSTomas Winkler if (mei_start(dev)) { 2342703d4b2STomas Winkler dev_err(&pdev->dev, "init hw failure.\n"); 2352703d4b2STomas Winkler err = -ENODEV; 2362703d4b2STomas Winkler goto release_irq; 2372703d4b2STomas Winkler } 2382703d4b2STomas Winkler 239180ea05bSTomas Winkler pm_runtime_set_autosuspend_delay(&pdev->dev, MEI_ME_RPM_TIMEOUT); 240180ea05bSTomas Winkler pm_runtime_use_autosuspend(&pdev->dev); 241180ea05bSTomas Winkler 242f3d8e878SAlexander Usyskin err = mei_register(dev, &pdev->dev); 2432703d4b2STomas Winkler if (err) 2441f7e489aSAlexander Usyskin goto stop; 2452703d4b2STomas Winkler 2462703d4b2STomas Winkler pci_set_drvdata(pdev, dev); 2472703d4b2STomas Winkler 248e13fa90cSTomas Winkler /* 249557909e1SAlexander Usyskin * MEI requires to resume from runtime suspend mode 250557909e1SAlexander Usyskin * in order to perform link reset flow upon system suspend. 251557909e1SAlexander Usyskin */ 252e0751556SRafael J. Wysocki dev_pm_set_driver_flags(&pdev->dev, DPM_FLAG_NO_DIRECT_COMPLETE); 253557909e1SAlexander Usyskin 254557909e1SAlexander Usyskin /* 255b42dc063SAlexander Usyskin * ME maps runtime suspend/resume to D0i states, 256b42dc063SAlexander Usyskin * hence we need to go around native PCI runtime service which 257b42dc063SAlexander Usyskin * eventually brings the device into D3cold/hot state, 258b42dc063SAlexander Usyskin * but the mei device cannot wake up from D3 unlike from D0i3. 259b42dc063SAlexander Usyskin * To get around the PCI device native runtime pm, 260b42dc063SAlexander Usyskin * ME uses runtime pm domain handlers which take precedence 261b42dc063SAlexander Usyskin * over the driver's pm handlers. 262e13fa90cSTomas Winkler */ 263e13fa90cSTomas Winkler mei_me_set_pm_domain(dev); 264e13fa90cSTomas Winkler 265cc365dcfSTomas Winkler if (mei_pg_is_enabled(dev)) { 266180ea05bSTomas Winkler pm_runtime_put_noidle(&pdev->dev); 267cc365dcfSTomas Winkler if (hw->d0i3_supported) 268cc365dcfSTomas Winkler pm_runtime_allow(&pdev->dev); 269cc365dcfSTomas Winkler } 270180ea05bSTomas Winkler 271c4e87b52SAlexander Usyskin dev_dbg(&pdev->dev, "initialization successful.\n"); 2722703d4b2STomas Winkler 2732703d4b2STomas Winkler return 0; 2742703d4b2STomas Winkler 2751f7e489aSAlexander Usyskin stop: 2761f7e489aSAlexander Usyskin mei_stop(dev); 2772703d4b2STomas Winkler release_irq: 278dc844b0dSTomas Winkler mei_cancel_work(dev); 2792703d4b2STomas Winkler mei_disable_interrupts(dev); 2802703d4b2STomas Winkler free_irq(pdev->irq, dev); 2812703d4b2STomas Winkler end: 2822703d4b2STomas Winkler dev_err(&pdev->dev, "initialization failed.\n"); 2832703d4b2STomas Winkler return err; 2842703d4b2STomas Winkler } 2852703d4b2STomas Winkler 2862703d4b2STomas Winkler /** 2875c4c0106STomas Winkler * mei_me_shutdown - Device Removal Routine 2885c4c0106STomas Winkler * 2895c4c0106STomas Winkler * @pdev: PCI device structure 2905c4c0106STomas Winkler * 2915c4c0106STomas Winkler * mei_me_shutdown is called from the reboot notifier 2925c4c0106STomas Winkler * it's a simplified version of remove so we go down 2935c4c0106STomas Winkler * faster. 2945c4c0106STomas Winkler */ 2955c4c0106STomas Winkler static void mei_me_shutdown(struct pci_dev *pdev) 2965c4c0106STomas Winkler { 2975c4c0106STomas Winkler struct mei_device *dev; 2985c4c0106STomas Winkler 2995c4c0106STomas Winkler dev = pci_get_drvdata(pdev); 3005c4c0106STomas Winkler if (!dev) 3015c4c0106STomas Winkler return; 3025c4c0106STomas Winkler 3035c4c0106STomas Winkler dev_dbg(&pdev->dev, "shutdown\n"); 3045c4c0106STomas Winkler mei_stop(dev); 3055c4c0106STomas Winkler 3065c4c0106STomas Winkler mei_me_unset_pm_domain(dev); 3075c4c0106STomas Winkler 3085c4c0106STomas Winkler mei_disable_interrupts(dev); 3095c4c0106STomas Winkler free_irq(pdev->irq, dev); 3105c4c0106STomas Winkler } 3115c4c0106STomas Winkler 3125c4c0106STomas Winkler /** 313ce23139cSAlexander Usyskin * mei_me_remove - Device Removal Routine 3142703d4b2STomas Winkler * 3152703d4b2STomas Winkler * @pdev: PCI device structure 3162703d4b2STomas Winkler * 3175c4c0106STomas Winkler * mei_me_remove is called by the PCI subsystem to alert the driver 3182703d4b2STomas Winkler * that it should release a PCI device. 3192703d4b2STomas Winkler */ 320b68301e9STomas Winkler static void mei_me_remove(struct pci_dev *pdev) 3212703d4b2STomas Winkler { 3222703d4b2STomas Winkler struct mei_device *dev; 3232703d4b2STomas Winkler 3242703d4b2STomas Winkler dev = pci_get_drvdata(pdev); 3252703d4b2STomas Winkler if (!dev) 3262703d4b2STomas Winkler return; 3272703d4b2STomas Winkler 328180ea05bSTomas Winkler if (mei_pg_is_enabled(dev)) 329180ea05bSTomas Winkler pm_runtime_get_noresume(&pdev->dev); 330180ea05bSTomas Winkler 331ed6f7ac1SPaul Bolle dev_dbg(&pdev->dev, "stop\n"); 3327cb035d9STomas Winkler mei_stop(dev); 3332703d4b2STomas Winkler 334e13fa90cSTomas Winkler mei_me_unset_pm_domain(dev); 335e13fa90cSTomas Winkler 3362703d4b2STomas Winkler mei_disable_interrupts(dev); 3372703d4b2STomas Winkler 3382703d4b2STomas Winkler free_irq(pdev->irq, dev); 3392703d4b2STomas Winkler 34030e53bb8STomas Winkler mei_deregister(dev); 3412703d4b2STomas Winkler } 342f8a09605STomas Winkler 34316833257SAlexander Usyskin #ifdef CONFIG_PM_SLEEP 344b68301e9STomas Winkler static int mei_me_pci_suspend(struct device *device) 3452703d4b2STomas Winkler { 3462703d4b2STomas Winkler struct pci_dev *pdev = to_pci_dev(device); 3472703d4b2STomas Winkler struct mei_device *dev = pci_get_drvdata(pdev); 3482703d4b2STomas Winkler 3492703d4b2STomas Winkler if (!dev) 3502703d4b2STomas Winkler return -ENODEV; 3512703d4b2STomas Winkler 352ed6f7ac1SPaul Bolle dev_dbg(&pdev->dev, "suspend\n"); 3532703d4b2STomas Winkler 3547cb035d9STomas Winkler mei_stop(dev); 3557cb035d9STomas Winkler 3567cb035d9STomas Winkler mei_disable_interrupts(dev); 3572703d4b2STomas Winkler 3582703d4b2STomas Winkler free_irq(pdev->irq, dev); 3592703d4b2STomas Winkler pci_disable_msi(pdev); 3602703d4b2STomas Winkler 3617cb035d9STomas Winkler return 0; 3622703d4b2STomas Winkler } 3632703d4b2STomas Winkler 364b68301e9STomas Winkler static int mei_me_pci_resume(struct device *device) 3652703d4b2STomas Winkler { 3662703d4b2STomas Winkler struct pci_dev *pdev = to_pci_dev(device); 3672703d4b2STomas Winkler struct mei_device *dev; 3681fa55b4eSAlexander Usyskin unsigned int irqflags; 3692703d4b2STomas Winkler int err; 3702703d4b2STomas Winkler 3712703d4b2STomas Winkler dev = pci_get_drvdata(pdev); 3722703d4b2STomas Winkler if (!dev) 3732703d4b2STomas Winkler return -ENODEV; 3742703d4b2STomas Winkler 3752703d4b2STomas Winkler pci_enable_msi(pdev); 3762703d4b2STomas Winkler 3771fa55b4eSAlexander Usyskin irqflags = pci_dev_msi_enabled(pdev) ? IRQF_ONESHOT : IRQF_SHARED; 3781fa55b4eSAlexander Usyskin 3792703d4b2STomas Winkler /* request and enable interrupt */ 3802703d4b2STomas Winkler err = request_threaded_irq(pdev->irq, 38106ecd645STomas Winkler mei_me_irq_quick_handler, 38206ecd645STomas Winkler mei_me_irq_thread_handler, 3831fa55b4eSAlexander Usyskin irqflags, KBUILD_MODNAME, dev); 3842703d4b2STomas Winkler 3852703d4b2STomas Winkler if (err) { 3862703d4b2STomas Winkler dev_err(&pdev->dev, "request_threaded_irq failed: irq = %d.\n", 3872703d4b2STomas Winkler pdev->irq); 3882703d4b2STomas Winkler return err; 3892703d4b2STomas Winkler } 3902703d4b2STomas Winkler 39133ec0826STomas Winkler err = mei_restart(dev); 39233ec0826STomas Winkler if (err) 39333ec0826STomas Winkler return err; 3942703d4b2STomas Winkler 3952703d4b2STomas Winkler /* Start timer if stopped in suspend */ 3962703d4b2STomas Winkler schedule_delayed_work(&dev->timer_work, HZ); 3972703d4b2STomas Winkler 39833ec0826STomas Winkler return 0; 3992703d4b2STomas Winkler } 400180ea05bSTomas Winkler #endif /* CONFIG_PM_SLEEP */ 40116833257SAlexander Usyskin 402bbd6d050SRafael J. Wysocki #ifdef CONFIG_PM 403180ea05bSTomas Winkler static int mei_me_pm_runtime_idle(struct device *device) 404180ea05bSTomas Winkler { 405180ea05bSTomas Winkler struct mei_device *dev; 406180ea05bSTomas Winkler 407ab81f3f3SChuhong Yuan dev_dbg(device, "rpm: me: runtime_idle\n"); 408180ea05bSTomas Winkler 409ab81f3f3SChuhong Yuan dev = dev_get_drvdata(device); 410180ea05bSTomas Winkler if (!dev) 411180ea05bSTomas Winkler return -ENODEV; 412180ea05bSTomas Winkler if (mei_write_is_idle(dev)) 413d5d83f8aSAlexander Usyskin pm_runtime_autosuspend(device); 414180ea05bSTomas Winkler 415180ea05bSTomas Winkler return -EBUSY; 416180ea05bSTomas Winkler } 417180ea05bSTomas Winkler 418180ea05bSTomas Winkler static int mei_me_pm_runtime_suspend(struct device *device) 419180ea05bSTomas Winkler { 420180ea05bSTomas Winkler struct mei_device *dev; 421180ea05bSTomas Winkler int ret; 422180ea05bSTomas Winkler 423ab81f3f3SChuhong Yuan dev_dbg(device, "rpm: me: runtime suspend\n"); 424180ea05bSTomas Winkler 425ab81f3f3SChuhong Yuan dev = dev_get_drvdata(device); 426180ea05bSTomas Winkler if (!dev) 427180ea05bSTomas Winkler return -ENODEV; 428180ea05bSTomas Winkler 429180ea05bSTomas Winkler mutex_lock(&dev->device_lock); 430180ea05bSTomas Winkler 431180ea05bSTomas Winkler if (mei_write_is_idle(dev)) 4322d1995fcSAlexander Usyskin ret = mei_me_pg_enter_sync(dev); 433180ea05bSTomas Winkler else 434180ea05bSTomas Winkler ret = -EAGAIN; 435180ea05bSTomas Winkler 436180ea05bSTomas Winkler mutex_unlock(&dev->device_lock); 437180ea05bSTomas Winkler 438ab81f3f3SChuhong Yuan dev_dbg(device, "rpm: me: runtime suspend ret=%d\n", ret); 439180ea05bSTomas Winkler 44077537ad2SAlexander Usyskin if (ret && ret != -EAGAIN) 44177537ad2SAlexander Usyskin schedule_work(&dev->reset_work); 44277537ad2SAlexander Usyskin 443180ea05bSTomas Winkler return ret; 444180ea05bSTomas Winkler } 445180ea05bSTomas Winkler 446180ea05bSTomas Winkler static int mei_me_pm_runtime_resume(struct device *device) 447180ea05bSTomas Winkler { 448180ea05bSTomas Winkler struct mei_device *dev; 449180ea05bSTomas Winkler int ret; 450180ea05bSTomas Winkler 451ab81f3f3SChuhong Yuan dev_dbg(device, "rpm: me: runtime resume\n"); 452180ea05bSTomas Winkler 453ab81f3f3SChuhong Yuan dev = dev_get_drvdata(device); 454180ea05bSTomas Winkler if (!dev) 455180ea05bSTomas Winkler return -ENODEV; 456180ea05bSTomas Winkler 457180ea05bSTomas Winkler mutex_lock(&dev->device_lock); 458180ea05bSTomas Winkler 4592d1995fcSAlexander Usyskin ret = mei_me_pg_exit_sync(dev); 460180ea05bSTomas Winkler 461180ea05bSTomas Winkler mutex_unlock(&dev->device_lock); 462180ea05bSTomas Winkler 463ab81f3f3SChuhong Yuan dev_dbg(device, "rpm: me: runtime resume ret = %d\n", ret); 464180ea05bSTomas Winkler 46577537ad2SAlexander Usyskin if (ret) 46677537ad2SAlexander Usyskin schedule_work(&dev->reset_work); 46777537ad2SAlexander Usyskin 468180ea05bSTomas Winkler return ret; 469180ea05bSTomas Winkler } 470e13fa90cSTomas Winkler 471e13fa90cSTomas Winkler /** 4727efceb55SGeert Uytterhoeven * mei_me_set_pm_domain - fill and set pm domain structure for device 473e13fa90cSTomas Winkler * 474e13fa90cSTomas Winkler * @dev: mei_device 475e13fa90cSTomas Winkler */ 476e13fa90cSTomas Winkler static inline void mei_me_set_pm_domain(struct mei_device *dev) 477e13fa90cSTomas Winkler { 478d08b8fc0STomas Winkler struct pci_dev *pdev = to_pci_dev(dev->dev); 479e13fa90cSTomas Winkler 480e13fa90cSTomas Winkler if (pdev->dev.bus && pdev->dev.bus->pm) { 481e13fa90cSTomas Winkler dev->pg_domain.ops = *pdev->dev.bus->pm; 482e13fa90cSTomas Winkler 483e13fa90cSTomas Winkler dev->pg_domain.ops.runtime_suspend = mei_me_pm_runtime_suspend; 484e13fa90cSTomas Winkler dev->pg_domain.ops.runtime_resume = mei_me_pm_runtime_resume; 485e13fa90cSTomas Winkler dev->pg_domain.ops.runtime_idle = mei_me_pm_runtime_idle; 486e13fa90cSTomas Winkler 487989561deSTomeu Vizoso dev_pm_domain_set(&pdev->dev, &dev->pg_domain); 488e13fa90cSTomas Winkler } 489e13fa90cSTomas Winkler } 490e13fa90cSTomas Winkler 491e13fa90cSTomas Winkler /** 4927efceb55SGeert Uytterhoeven * mei_me_unset_pm_domain - clean pm domain structure for device 493e13fa90cSTomas Winkler * 494e13fa90cSTomas Winkler * @dev: mei_device 495e13fa90cSTomas Winkler */ 496e13fa90cSTomas Winkler static inline void mei_me_unset_pm_domain(struct mei_device *dev) 497e13fa90cSTomas Winkler { 498e13fa90cSTomas Winkler /* stop using pm callbacks if any */ 499989561deSTomeu Vizoso dev_pm_domain_set(dev->dev, NULL); 500e13fa90cSTomas Winkler } 501180ea05bSTomas Winkler 502180ea05bSTomas Winkler static const struct dev_pm_ops mei_me_pm_ops = { 503180ea05bSTomas Winkler SET_SYSTEM_SLEEP_PM_OPS(mei_me_pci_suspend, 504180ea05bSTomas Winkler mei_me_pci_resume) 505180ea05bSTomas Winkler SET_RUNTIME_PM_OPS( 506180ea05bSTomas Winkler mei_me_pm_runtime_suspend, 507180ea05bSTomas Winkler mei_me_pm_runtime_resume, 508180ea05bSTomas Winkler mei_me_pm_runtime_idle) 509180ea05bSTomas Winkler }; 510180ea05bSTomas Winkler 511b68301e9STomas Winkler #define MEI_ME_PM_OPS (&mei_me_pm_ops) 5122703d4b2STomas Winkler #else 513b68301e9STomas Winkler #define MEI_ME_PM_OPS NULL 514180ea05bSTomas Winkler #endif /* CONFIG_PM */ 5152703d4b2STomas Winkler /* 5162703d4b2STomas Winkler * PCI driver structure 5172703d4b2STomas Winkler */ 518b68301e9STomas Winkler static struct pci_driver mei_me_driver = { 5192703d4b2STomas Winkler .name = KBUILD_MODNAME, 520b68301e9STomas Winkler .id_table = mei_me_pci_tbl, 521b68301e9STomas Winkler .probe = mei_me_probe, 522b68301e9STomas Winkler .remove = mei_me_remove, 5235c4c0106STomas Winkler .shutdown = mei_me_shutdown, 524b68301e9STomas Winkler .driver.pm = MEI_ME_PM_OPS, 52567de6bf1SAlexander Usyskin .driver.probe_type = PROBE_PREFER_ASYNCHRONOUS, 5262703d4b2STomas Winkler }; 5272703d4b2STomas Winkler 528b68301e9STomas Winkler module_pci_driver(mei_me_driver); 5292703d4b2STomas Winkler 5302703d4b2STomas Winkler MODULE_AUTHOR("Intel Corporation"); 5312703d4b2STomas Winkler MODULE_DESCRIPTION("Intel(R) Management Engine Interface"); 5322703d4b2STomas Winkler MODULE_LICENSE("GPL v2"); 533