524 строки
13 KiB
C
524 строки
13 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (c) 2003-2020, Intel Corporation. All rights reserved.
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* Intel Management Engine Interface (Intel MEI) Linux driver
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/device.h>
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#include <linux/errno.h>
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#include <linux/types.h>
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#include <linux/pci.h>
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#include <linux/sched.h>
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#include <linux/interrupt.h>
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#include <linux/pm_domain.h>
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#include <linux/pm_runtime.h>
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#include <linux/mei.h>
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#include "mei_dev.h"
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#include "client.h"
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#include "hw-me-regs.h"
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#include "hw-me.h"
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/* mei_pci_tbl - PCI Device ID Table */
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static const struct pci_device_id mei_me_pci_tbl[] = {
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{MEI_PCI_DEVICE(MEI_DEV_ID_82946GZ, MEI_ME_ICH_CFG)},
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{MEI_PCI_DEVICE(MEI_DEV_ID_82G35, MEI_ME_ICH_CFG)},
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{MEI_PCI_DEVICE(MEI_DEV_ID_82Q965, MEI_ME_ICH_CFG)},
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{MEI_PCI_DEVICE(MEI_DEV_ID_82G965, MEI_ME_ICH_CFG)},
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{MEI_PCI_DEVICE(MEI_DEV_ID_82GM965, MEI_ME_ICH_CFG)},
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{MEI_PCI_DEVICE(MEI_DEV_ID_82GME965, MEI_ME_ICH_CFG)},
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{MEI_PCI_DEVICE(MEI_DEV_ID_ICH9_82Q35, MEI_ME_ICH_CFG)},
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{MEI_PCI_DEVICE(MEI_DEV_ID_ICH9_82G33, MEI_ME_ICH_CFG)},
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{MEI_PCI_DEVICE(MEI_DEV_ID_ICH9_82Q33, MEI_ME_ICH_CFG)},
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{MEI_PCI_DEVICE(MEI_DEV_ID_ICH9_82X38, MEI_ME_ICH_CFG)},
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{MEI_PCI_DEVICE(MEI_DEV_ID_ICH9_3200, MEI_ME_ICH_CFG)},
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{MEI_PCI_DEVICE(MEI_DEV_ID_ICH9_6, MEI_ME_ICH_CFG)},
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{MEI_PCI_DEVICE(MEI_DEV_ID_ICH9_7, MEI_ME_ICH_CFG)},
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{MEI_PCI_DEVICE(MEI_DEV_ID_ICH9_8, MEI_ME_ICH_CFG)},
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{MEI_PCI_DEVICE(MEI_DEV_ID_ICH9_9, MEI_ME_ICH_CFG)},
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{MEI_PCI_DEVICE(MEI_DEV_ID_ICH9_10, MEI_ME_ICH_CFG)},
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{MEI_PCI_DEVICE(MEI_DEV_ID_ICH9M_1, MEI_ME_ICH_CFG)},
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{MEI_PCI_DEVICE(MEI_DEV_ID_ICH9M_2, MEI_ME_ICH_CFG)},
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{MEI_PCI_DEVICE(MEI_DEV_ID_ICH9M_3, MEI_ME_ICH_CFG)},
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{MEI_PCI_DEVICE(MEI_DEV_ID_ICH9M_4, MEI_ME_ICH_CFG)},
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{MEI_PCI_DEVICE(MEI_DEV_ID_ICH10_1, MEI_ME_ICH10_CFG)},
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{MEI_PCI_DEVICE(MEI_DEV_ID_ICH10_2, MEI_ME_ICH10_CFG)},
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{MEI_PCI_DEVICE(MEI_DEV_ID_ICH10_3, MEI_ME_ICH10_CFG)},
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{MEI_PCI_DEVICE(MEI_DEV_ID_ICH10_4, MEI_ME_ICH10_CFG)},
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{MEI_PCI_DEVICE(MEI_DEV_ID_IBXPK_1, MEI_ME_PCH6_CFG)},
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{MEI_PCI_DEVICE(MEI_DEV_ID_IBXPK_2, MEI_ME_PCH6_CFG)},
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{MEI_PCI_DEVICE(MEI_DEV_ID_CPT_1, MEI_ME_PCH_CPT_PBG_CFG)},
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{MEI_PCI_DEVICE(MEI_DEV_ID_PBG_1, MEI_ME_PCH_CPT_PBG_CFG)},
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{MEI_PCI_DEVICE(MEI_DEV_ID_PPT_1, MEI_ME_PCH7_CFG)},
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{MEI_PCI_DEVICE(MEI_DEV_ID_PPT_2, MEI_ME_PCH7_CFG)},
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{MEI_PCI_DEVICE(MEI_DEV_ID_PPT_3, MEI_ME_PCH7_CFG)},
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{MEI_PCI_DEVICE(MEI_DEV_ID_LPT_H, MEI_ME_PCH8_SPS_CFG)},
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{MEI_PCI_DEVICE(MEI_DEV_ID_LPT_W, MEI_ME_PCH8_SPS_CFG)},
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{MEI_PCI_DEVICE(MEI_DEV_ID_LPT_LP, MEI_ME_PCH8_CFG)},
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{MEI_PCI_DEVICE(MEI_DEV_ID_LPT_HR, MEI_ME_PCH8_SPS_CFG)},
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{MEI_PCI_DEVICE(MEI_DEV_ID_WPT_LP, MEI_ME_PCH8_CFG)},
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{MEI_PCI_DEVICE(MEI_DEV_ID_WPT_LP_2, MEI_ME_PCH8_CFG)},
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{MEI_PCI_DEVICE(MEI_DEV_ID_SPT, MEI_ME_PCH8_CFG)},
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{MEI_PCI_DEVICE(MEI_DEV_ID_SPT_2, MEI_ME_PCH8_CFG)},
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{MEI_PCI_DEVICE(MEI_DEV_ID_SPT_H, MEI_ME_PCH8_SPS_CFG)},
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{MEI_PCI_DEVICE(MEI_DEV_ID_SPT_H_2, MEI_ME_PCH8_SPS_CFG)},
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{MEI_PCI_DEVICE(MEI_DEV_ID_LBG, MEI_ME_PCH12_CFG)},
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{MEI_PCI_DEVICE(MEI_DEV_ID_BXT_M, MEI_ME_PCH8_CFG)},
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{MEI_PCI_DEVICE(MEI_DEV_ID_APL_I, MEI_ME_PCH8_CFG)},
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{MEI_PCI_DEVICE(MEI_DEV_ID_DNV_IE, MEI_ME_PCH8_CFG)},
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{MEI_PCI_DEVICE(MEI_DEV_ID_GLK, MEI_ME_PCH8_CFG)},
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{MEI_PCI_DEVICE(MEI_DEV_ID_KBP, MEI_ME_PCH8_CFG)},
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{MEI_PCI_DEVICE(MEI_DEV_ID_KBP_2, MEI_ME_PCH8_CFG)},
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{MEI_PCI_DEVICE(MEI_DEV_ID_CNP_LP, MEI_ME_PCH12_CFG)},
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{MEI_PCI_DEVICE(MEI_DEV_ID_CNP_LP_3, MEI_ME_PCH8_CFG)},
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{MEI_PCI_DEVICE(MEI_DEV_ID_CNP_H, MEI_ME_PCH12_CFG)},
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{MEI_PCI_DEVICE(MEI_DEV_ID_CNP_H_3, MEI_ME_PCH8_CFG)},
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{MEI_PCI_DEVICE(MEI_DEV_ID_CMP_LP, MEI_ME_PCH12_CFG)},
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{MEI_PCI_DEVICE(MEI_DEV_ID_CMP_LP_3, MEI_ME_PCH8_CFG)},
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{MEI_PCI_DEVICE(MEI_DEV_ID_CMP_V, MEI_ME_PCH12_CFG)},
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{MEI_PCI_DEVICE(MEI_DEV_ID_CMP_H, MEI_ME_PCH12_CFG)},
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{MEI_PCI_DEVICE(MEI_DEV_ID_CMP_H_3, MEI_ME_PCH8_CFG)},
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{MEI_PCI_DEVICE(MEI_DEV_ID_ICP_LP, MEI_ME_PCH12_CFG)},
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{MEI_PCI_DEVICE(MEI_DEV_ID_TGP_LP, MEI_ME_PCH15_CFG)},
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{MEI_PCI_DEVICE(MEI_DEV_ID_JSP_N, MEI_ME_PCH15_CFG)},
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{MEI_PCI_DEVICE(MEI_DEV_ID_MCC, MEI_ME_PCH15_CFG)},
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{MEI_PCI_DEVICE(MEI_DEV_ID_MCC_4, MEI_ME_PCH8_CFG)},
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{MEI_PCI_DEVICE(MEI_DEV_ID_CDF, MEI_ME_PCH8_CFG)},
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/* required last entry */
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{0, }
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};
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MODULE_DEVICE_TABLE(pci, mei_me_pci_tbl);
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#ifdef CONFIG_PM
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static inline void mei_me_set_pm_domain(struct mei_device *dev);
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static inline void mei_me_unset_pm_domain(struct mei_device *dev);
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#else
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static inline void mei_me_set_pm_domain(struct mei_device *dev) {}
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static inline void mei_me_unset_pm_domain(struct mei_device *dev) {}
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#endif /* CONFIG_PM */
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static int mei_me_read_fws(const struct mei_device *dev, int where, u32 *val)
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{
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struct pci_dev *pdev = to_pci_dev(dev->dev);
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return pci_read_config_dword(pdev, where, val);
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}
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/**
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* mei_me_quirk_probe - probe for devices that doesn't valid ME interface
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*
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* @pdev: PCI device structure
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* @cfg: per generation config
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*
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* Return: true if ME Interface is valid, false otherwise
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*/
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static bool mei_me_quirk_probe(struct pci_dev *pdev,
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const struct mei_cfg *cfg)
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{
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if (cfg->quirk_probe && cfg->quirk_probe(pdev)) {
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dev_info(&pdev->dev, "Device doesn't have valid ME Interface\n");
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return false;
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}
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return true;
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}
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/**
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* mei_me_probe - Device Initialization Routine
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*
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* @pdev: PCI device structure
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* @ent: entry in kcs_pci_tbl
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*
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* Return: 0 on success, <0 on failure.
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*/
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static int mei_me_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
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{
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const struct mei_cfg *cfg;
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struct mei_device *dev;
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struct mei_me_hw *hw;
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unsigned int irqflags;
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int err;
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cfg = mei_me_get_cfg(ent->driver_data);
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if (!cfg)
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return -ENODEV;
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if (!mei_me_quirk_probe(pdev, cfg))
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return -ENODEV;
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/* enable pci dev */
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err = pcim_enable_device(pdev);
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if (err) {
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dev_err(&pdev->dev, "failed to enable pci device.\n");
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goto end;
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}
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/* set PCI host mastering */
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pci_set_master(pdev);
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/* pci request regions and mapping IO device memory for mei driver */
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err = pcim_iomap_regions(pdev, BIT(0), KBUILD_MODNAME);
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if (err) {
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dev_err(&pdev->dev, "failed to get pci regions.\n");
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goto end;
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}
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if (dma_set_mask(&pdev->dev, DMA_BIT_MASK(64)) ||
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dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64))) {
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err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
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if (err)
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err = dma_set_coherent_mask(&pdev->dev,
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DMA_BIT_MASK(32));
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}
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if (err) {
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dev_err(&pdev->dev, "No usable DMA configuration, aborting\n");
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goto end;
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}
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/* allocates and initializes the mei dev structure */
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dev = mei_me_dev_init(&pdev->dev, cfg);
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if (!dev) {
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err = -ENOMEM;
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goto end;
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}
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hw = to_me_hw(dev);
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hw->mem_addr = pcim_iomap_table(pdev)[0];
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hw->irq = pdev->irq;
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hw->read_fws = mei_me_read_fws;
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pci_enable_msi(pdev);
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/* request and enable interrupt */
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irqflags = pci_dev_msi_enabled(pdev) ? IRQF_ONESHOT : IRQF_SHARED;
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err = request_threaded_irq(pdev->irq,
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mei_me_irq_quick_handler,
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mei_me_irq_thread_handler,
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irqflags, KBUILD_MODNAME, dev);
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if (err) {
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dev_err(&pdev->dev, "request_threaded_irq failure. irq = %d\n",
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pdev->irq);
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goto end;
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}
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if (mei_start(dev)) {
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dev_err(&pdev->dev, "init hw failure.\n");
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err = -ENODEV;
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goto release_irq;
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}
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pm_runtime_set_autosuspend_delay(&pdev->dev, MEI_ME_RPM_TIMEOUT);
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pm_runtime_use_autosuspend(&pdev->dev);
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err = mei_register(dev, &pdev->dev);
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if (err)
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goto stop;
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pci_set_drvdata(pdev, dev);
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/*
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* MEI requires to resume from runtime suspend mode
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* in order to perform link reset flow upon system suspend.
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*/
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dev_pm_set_driver_flags(&pdev->dev, DPM_FLAG_NEVER_SKIP);
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/*
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* ME maps runtime suspend/resume to D0i states,
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* hence we need to go around native PCI runtime service which
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* eventually brings the device into D3cold/hot state,
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* but the mei device cannot wake up from D3 unlike from D0i3.
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* To get around the PCI device native runtime pm,
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* ME uses runtime pm domain handlers which take precedence
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* over the driver's pm handlers.
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*/
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mei_me_set_pm_domain(dev);
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if (mei_pg_is_enabled(dev)) {
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pm_runtime_put_noidle(&pdev->dev);
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if (hw->d0i3_supported)
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pm_runtime_allow(&pdev->dev);
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}
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dev_dbg(&pdev->dev, "initialization successful.\n");
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return 0;
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stop:
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mei_stop(dev);
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release_irq:
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mei_cancel_work(dev);
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mei_disable_interrupts(dev);
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free_irq(pdev->irq, dev);
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end:
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dev_err(&pdev->dev, "initialization failed.\n");
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return err;
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}
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/**
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* mei_me_shutdown - Device Removal Routine
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*
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* @pdev: PCI device structure
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*
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* mei_me_shutdown is called from the reboot notifier
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* it's a simplified version of remove so we go down
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* faster.
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*/
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static void mei_me_shutdown(struct pci_dev *pdev)
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{
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struct mei_device *dev;
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dev = pci_get_drvdata(pdev);
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if (!dev)
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return;
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dev_dbg(&pdev->dev, "shutdown\n");
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mei_stop(dev);
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mei_me_unset_pm_domain(dev);
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mei_disable_interrupts(dev);
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free_irq(pdev->irq, dev);
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}
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/**
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* mei_me_remove - Device Removal Routine
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*
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* @pdev: PCI device structure
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*
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* mei_me_remove is called by the PCI subsystem to alert the driver
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* that it should release a PCI device.
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*/
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static void mei_me_remove(struct pci_dev *pdev)
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{
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struct mei_device *dev;
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dev = pci_get_drvdata(pdev);
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if (!dev)
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return;
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if (mei_pg_is_enabled(dev))
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pm_runtime_get_noresume(&pdev->dev);
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dev_dbg(&pdev->dev, "stop\n");
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mei_stop(dev);
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mei_me_unset_pm_domain(dev);
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mei_disable_interrupts(dev);
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free_irq(pdev->irq, dev);
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mei_deregister(dev);
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}
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#ifdef CONFIG_PM_SLEEP
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static int mei_me_pci_suspend(struct device *device)
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{
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struct pci_dev *pdev = to_pci_dev(device);
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struct mei_device *dev = pci_get_drvdata(pdev);
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if (!dev)
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return -ENODEV;
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dev_dbg(&pdev->dev, "suspend\n");
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mei_stop(dev);
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mei_disable_interrupts(dev);
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free_irq(pdev->irq, dev);
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pci_disable_msi(pdev);
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return 0;
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}
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static int mei_me_pci_resume(struct device *device)
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{
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struct pci_dev *pdev = to_pci_dev(device);
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struct mei_device *dev;
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unsigned int irqflags;
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int err;
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dev = pci_get_drvdata(pdev);
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if (!dev)
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return -ENODEV;
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pci_enable_msi(pdev);
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irqflags = pci_dev_msi_enabled(pdev) ? IRQF_ONESHOT : IRQF_SHARED;
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/* request and enable interrupt */
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err = request_threaded_irq(pdev->irq,
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mei_me_irq_quick_handler,
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mei_me_irq_thread_handler,
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irqflags, KBUILD_MODNAME, dev);
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if (err) {
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dev_err(&pdev->dev, "request_threaded_irq failed: irq = %d.\n",
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pdev->irq);
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return err;
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}
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err = mei_restart(dev);
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if (err)
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return err;
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/* Start timer if stopped in suspend */
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schedule_delayed_work(&dev->timer_work, HZ);
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return 0;
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}
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#endif /* CONFIG_PM_SLEEP */
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#ifdef CONFIG_PM
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static int mei_me_pm_runtime_idle(struct device *device)
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{
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struct mei_device *dev;
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dev_dbg(device, "rpm: me: runtime_idle\n");
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dev = dev_get_drvdata(device);
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if (!dev)
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return -ENODEV;
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if (mei_write_is_idle(dev))
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pm_runtime_autosuspend(device);
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return -EBUSY;
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}
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static int mei_me_pm_runtime_suspend(struct device *device)
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{
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struct mei_device *dev;
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int ret;
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dev_dbg(device, "rpm: me: runtime suspend\n");
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dev = dev_get_drvdata(device);
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if (!dev)
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return -ENODEV;
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mutex_lock(&dev->device_lock);
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if (mei_write_is_idle(dev))
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ret = mei_me_pg_enter_sync(dev);
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else
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ret = -EAGAIN;
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mutex_unlock(&dev->device_lock);
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dev_dbg(device, "rpm: me: runtime suspend ret=%d\n", ret);
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if (ret && ret != -EAGAIN)
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schedule_work(&dev->reset_work);
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return ret;
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}
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static int mei_me_pm_runtime_resume(struct device *device)
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{
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struct mei_device *dev;
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int ret;
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dev_dbg(device, "rpm: me: runtime resume\n");
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dev = dev_get_drvdata(device);
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if (!dev)
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return -ENODEV;
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mutex_lock(&dev->device_lock);
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ret = mei_me_pg_exit_sync(dev);
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mutex_unlock(&dev->device_lock);
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dev_dbg(device, "rpm: me: runtime resume ret = %d\n", ret);
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if (ret)
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schedule_work(&dev->reset_work);
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return ret;
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}
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/**
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* mei_me_set_pm_domain - fill and set pm domain structure for device
|
|
*
|
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* @dev: mei_device
|
|
*/
|
|
static inline void mei_me_set_pm_domain(struct mei_device *dev)
|
|
{
|
|
struct pci_dev *pdev = to_pci_dev(dev->dev);
|
|
|
|
if (pdev->dev.bus && pdev->dev.bus->pm) {
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dev->pg_domain.ops = *pdev->dev.bus->pm;
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|
|
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dev->pg_domain.ops.runtime_suspend = mei_me_pm_runtime_suspend;
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|
dev->pg_domain.ops.runtime_resume = mei_me_pm_runtime_resume;
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|
dev->pg_domain.ops.runtime_idle = mei_me_pm_runtime_idle;
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|
|
|
dev_pm_domain_set(&pdev->dev, &dev->pg_domain);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* mei_me_unset_pm_domain - clean pm domain structure for device
|
|
*
|
|
* @dev: mei_device
|
|
*/
|
|
static inline void mei_me_unset_pm_domain(struct mei_device *dev)
|
|
{
|
|
/* stop using pm callbacks if any */
|
|
dev_pm_domain_set(dev->dev, NULL);
|
|
}
|
|
|
|
static const struct dev_pm_ops mei_me_pm_ops = {
|
|
SET_SYSTEM_SLEEP_PM_OPS(mei_me_pci_suspend,
|
|
mei_me_pci_resume)
|
|
SET_RUNTIME_PM_OPS(
|
|
mei_me_pm_runtime_suspend,
|
|
mei_me_pm_runtime_resume,
|
|
mei_me_pm_runtime_idle)
|
|
};
|
|
|
|
#define MEI_ME_PM_OPS (&mei_me_pm_ops)
|
|
#else
|
|
#define MEI_ME_PM_OPS NULL
|
|
#endif /* CONFIG_PM */
|
|
/*
|
|
* PCI driver structure
|
|
*/
|
|
static struct pci_driver mei_me_driver = {
|
|
.name = KBUILD_MODNAME,
|
|
.id_table = mei_me_pci_tbl,
|
|
.probe = mei_me_probe,
|
|
.remove = mei_me_remove,
|
|
.shutdown = mei_me_shutdown,
|
|
.driver.pm = MEI_ME_PM_OPS,
|
|
.driver.probe_type = PROBE_PREFER_ASYNCHRONOUS,
|
|
};
|
|
|
|
module_pci_driver(mei_me_driver);
|
|
|
|
MODULE_AUTHOR("Intel Corporation");
|
|
MODULE_DESCRIPTION("Intel(R) Management Engine Interface");
|
|
MODULE_LICENSE("GPL v2");
|