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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ahci_platform.c (3085B)

      1// SPDX-License-Identifier: GPL-2.0-or-later
      2/*
      3 * AHCI SATA platform driver
      4 *
      5 * Copyright 2004-2005  Red Hat, Inc.
      6 *   Jeff Garzik <jgarzik@pobox.com>
      7 * Copyright 2010  MontaVista Software, LLC.
      8 *   Anton Vorontsov <avorontsov@ru.mvista.com>
      9 */
     10
     11#include <linux/kernel.h>
     12#include <linux/module.h>
     13#include <linux/pm.h>
     14#include <linux/device.h>
     15#include <linux/of_device.h>
     16#include <linux/platform_device.h>
     17#include <linux/libata.h>
     18#include <linux/ahci_platform.h>
     19#include <linux/acpi.h>
     20#include <linux/pci_ids.h>
     21#include "ahci.h"
     22
     23#define DRV_NAME "ahci"
     24
     25static const struct ata_port_info ahci_port_info = {
     26	.flags		= AHCI_FLAG_COMMON,
     27	.pio_mask	= ATA_PIO4,
     28	.udma_mask	= ATA_UDMA6,
     29	.port_ops	= &ahci_platform_ops,
     30};
     31
     32static const struct ata_port_info ahci_port_info_nolpm = {
     33	.flags		= AHCI_FLAG_COMMON | ATA_FLAG_NO_LPM,
     34	.pio_mask	= ATA_PIO4,
     35	.udma_mask	= ATA_UDMA6,
     36	.port_ops	= &ahci_platform_ops,
     37};
     38
     39static struct scsi_host_template ahci_platform_sht = {
     40	AHCI_SHT(DRV_NAME),
     41};
     42
     43static int ahci_probe(struct platform_device *pdev)
     44{
     45	struct device *dev = &pdev->dev;
     46	struct ahci_host_priv *hpriv;
     47	const struct ata_port_info *port;
     48	int rc;
     49
     50	hpriv = ahci_platform_get_resources(pdev,
     51					    AHCI_PLATFORM_GET_RESETS);
     52	if (IS_ERR(hpriv))
     53		return PTR_ERR(hpriv);
     54
     55	rc = ahci_platform_enable_resources(hpriv);
     56	if (rc)
     57		return rc;
     58
     59	of_property_read_u32(dev->of_node,
     60			     "ports-implemented", &hpriv->force_port_map);
     61
     62	if (of_device_is_compatible(dev->of_node, "hisilicon,hisi-ahci"))
     63		hpriv->flags |= AHCI_HFLAG_NO_FBS | AHCI_HFLAG_NO_NCQ;
     64
     65	port = acpi_device_get_match_data(dev);
     66	if (!port)
     67		port = &ahci_port_info;
     68
     69	rc = ahci_platform_init_host(pdev, hpriv, port,
     70				     &ahci_platform_sht);
     71	if (rc)
     72		goto disable_resources;
     73
     74	return 0;
     75disable_resources:
     76	ahci_platform_disable_resources(hpriv);
     77	return rc;
     78}
     79
     80static SIMPLE_DEV_PM_OPS(ahci_pm_ops, ahci_platform_suspend,
     81			 ahci_platform_resume);
     82
     83static const struct of_device_id ahci_of_match[] = {
     84	{ .compatible = "generic-ahci", },
     85	/* Keep the following compatibles for device tree compatibility */
     86	{ .compatible = "snps,spear-ahci", },
     87	{ .compatible = "ibm,476gtr-ahci", },
     88	{ .compatible = "snps,dwc-ahci", },
     89	{ .compatible = "hisilicon,hisi-ahci", },
     90	{ .compatible = "cavium,octeon-7130-ahci", },
     91	{ /* sentinel */ }
     92};
     93MODULE_DEVICE_TABLE(of, ahci_of_match);
     94
     95static const struct acpi_device_id ahci_acpi_match[] = {
     96	{ "APMC0D33", (unsigned long)&ahci_port_info_nolpm },
     97	{ ACPI_DEVICE_CLASS(PCI_CLASS_STORAGE_SATA_AHCI, 0xffffff) },
     98	{},
     99};
    100MODULE_DEVICE_TABLE(acpi, ahci_acpi_match);
    101
    102static struct platform_driver ahci_driver = {
    103	.probe = ahci_probe,
    104	.remove = ata_platform_remove_one,
    105	.shutdown = ahci_platform_shutdown,
    106	.driver = {
    107		.name = DRV_NAME,
    108		.of_match_table = ahci_of_match,
    109		.acpi_match_table = ahci_acpi_match,
    110		.pm = &ahci_pm_ops,
    111	},
    112};
    113module_platform_driver(ahci_driver);
    114
    115MODULE_DESCRIPTION("AHCI SATA platform driver");
    116MODULE_AUTHOR("Anton Vorontsov <avorontsov@ru.mvista.com>");
    117MODULE_LICENSE("GPL");
    118MODULE_ALIAS("platform:ahci");