cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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tc-dwc-g210-pci.c (3860B)

      1// SPDX-License-Identifier: GPL-2.0-only
      2/*
      3 * Synopsys G210 Test Chip driver
      4 *
      5 * Copyright (C) 2015-2016 Synopsys, Inc. (www.synopsys.com)
      6 *
      7 * Authors: Joao Pinto <jpinto@synopsys.com>
      8 */
      9
     10#include <ufs/ufshcd.h>
     11#include "ufshcd-dwc.h"
     12#include "tc-dwc-g210.h"
     13
     14#include <linux/module.h>
     15#include <linux/pci.h>
     16#include <linux/pm_runtime.h>
     17
     18/* Test Chip type expected values */
     19#define TC_G210_20BIT 20
     20#define TC_G210_40BIT 40
     21#define TC_G210_INV 0
     22
     23static int tc_type = TC_G210_INV;
     24module_param(tc_type, int, 0);
     25MODULE_PARM_DESC(tc_type, "Test Chip Type (20 = 20-bit, 40 = 40-bit)");
     26
     27/*
     28 * struct ufs_hba_dwc_vops - UFS DWC specific variant operations
     29 */
     30static struct ufs_hba_variant_ops tc_dwc_g210_pci_hba_vops = {
     31	.name                   = "tc-dwc-g210-pci",
     32	.link_startup_notify	= ufshcd_dwc_link_startup_notify,
     33};
     34
     35/**
     36 * tc_dwc_g210_pci_shutdown - main function to put the controller in reset state
     37 * @pdev: pointer to PCI device handle
     38 */
     39static void tc_dwc_g210_pci_shutdown(struct pci_dev *pdev)
     40{
     41	ufshcd_shutdown((struct ufs_hba *)pci_get_drvdata(pdev));
     42}
     43
     44/**
     45 * tc_dwc_g210_pci_remove - de-allocate PCI/SCSI host and host memory space
     46 *		data structure memory
     47 * @pdev: pointer to PCI handle
     48 */
     49static void tc_dwc_g210_pci_remove(struct pci_dev *pdev)
     50{
     51	struct ufs_hba *hba = pci_get_drvdata(pdev);
     52
     53	pm_runtime_forbid(&pdev->dev);
     54	pm_runtime_get_noresume(&pdev->dev);
     55	ufshcd_remove(hba);
     56}
     57
     58/**
     59 * tc_dwc_g210_pci_probe - probe routine of the driver
     60 * @pdev: pointer to PCI device handle
     61 * @id: PCI device id
     62 *
     63 * Returns 0 on success, non-zero value on failure
     64 */
     65static int
     66tc_dwc_g210_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
     67{
     68	struct ufs_hba *hba;
     69	void __iomem *mmio_base;
     70	int err;
     71
     72	/* Check Test Chip type and set the specific setup routine */
     73	if (tc_type == TC_G210_20BIT) {
     74		tc_dwc_g210_pci_hba_vops.phy_initialization =
     75						tc_dwc_g210_config_20_bit;
     76	} else if (tc_type == TC_G210_40BIT) {
     77		tc_dwc_g210_pci_hba_vops.phy_initialization =
     78						tc_dwc_g210_config_40_bit;
     79	} else {
     80		dev_err(&pdev->dev, "test chip version not specified\n");
     81		return -EPERM;
     82	}
     83
     84	err = pcim_enable_device(pdev);
     85	if (err) {
     86		dev_err(&pdev->dev, "pcim_enable_device failed\n");
     87		return err;
     88	}
     89
     90	pci_set_master(pdev);
     91
     92	err = pcim_iomap_regions(pdev, 1 << 0, UFSHCD);
     93	if (err < 0) {
     94		dev_err(&pdev->dev, "request and iomap failed\n");
     95		return err;
     96	}
     97
     98	mmio_base = pcim_iomap_table(pdev)[0];
     99
    100	err = ufshcd_alloc_host(&pdev->dev, &hba);
    101	if (err) {
    102		dev_err(&pdev->dev, "Allocation failed\n");
    103		return err;
    104	}
    105
    106	hba->vops = &tc_dwc_g210_pci_hba_vops;
    107
    108	err = ufshcd_init(hba, mmio_base, pdev->irq);
    109	if (err) {
    110		dev_err(&pdev->dev, "Initialization failed\n");
    111		return err;
    112	}
    113
    114	pm_runtime_put_noidle(&pdev->dev);
    115	pm_runtime_allow(&pdev->dev);
    116
    117	return 0;
    118}
    119
    120static const struct dev_pm_ops tc_dwc_g210_pci_pm_ops = {
    121	SET_SYSTEM_SLEEP_PM_OPS(ufshcd_system_suspend, ufshcd_system_resume)
    122	SET_RUNTIME_PM_OPS(ufshcd_runtime_suspend, ufshcd_runtime_resume, NULL)
    123	.prepare	 = ufshcd_suspend_prepare,
    124	.complete	 = ufshcd_resume_complete,
    125};
    126
    127static const struct pci_device_id tc_dwc_g210_pci_tbl[] = {
    128	{ PCI_VENDOR_ID_SYNOPSYS, 0xB101, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
    129	{ PCI_VENDOR_ID_SYNOPSYS, 0xB102, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
    130	{ }	/* terminate list */
    131};
    132
    133MODULE_DEVICE_TABLE(pci, tc_dwc_g210_pci_tbl);
    134
    135static struct pci_driver tc_dwc_g210_pci_driver = {
    136	.name = "tc-dwc-g210-pci",
    137	.id_table = tc_dwc_g210_pci_tbl,
    138	.probe = tc_dwc_g210_pci_probe,
    139	.remove = tc_dwc_g210_pci_remove,
    140	.shutdown = tc_dwc_g210_pci_shutdown,
    141	.driver = {
    142		.pm = &tc_dwc_g210_pci_pm_ops
    143	},
    144};
    145
    146module_pci_driver(tc_dwc_g210_pci_driver);
    147
    148MODULE_AUTHOR("Joao Pinto <Joao.Pinto@synopsys.com>");
    149MODULE_DESCRIPTION("Synopsys Test Chip G210 PCI glue driver");
    150MODULE_LICENSE("Dual BSD/GPL");