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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dmx3191d.c (3697B)

      1// SPDX-License-Identifier: GPL-2.0-or-later
      2/*
      3    dmx3191d.c - driver for the Domex DMX3191D SCSI card.
      4    Copyright (C) 2000 by Massimo Piccioni <dafastidio@libero.it>
      5    Portions Copyright (C) 2004 by Christoph Hellwig <hch@lst.de>
      6
      7    Based on the generic NCR5380 driver by Drew Eckhardt et al.
      8
      9*/
     10
     11#include <linux/init.h>
     12#include <linux/ioport.h>
     13#include <linux/kernel.h>
     14#include <linux/module.h>
     15#include <linux/pci.h>
     16#include <linux/interrupt.h>
     17#include <asm/io.h>
     18
     19#include <scsi/scsi_host.h>
     20
     21/*
     22 * Definitions for the generic 5380 driver.
     23 */
     24
     25#define NCR5380_read(reg)		inb(hostdata->base + (reg))
     26#define NCR5380_write(reg, value)	outb(value, hostdata->base + (reg))
     27
     28#define NCR5380_dma_xfer_len		NCR5380_dma_xfer_none
     29#define NCR5380_dma_recv_setup		NCR5380_dma_setup_none
     30#define NCR5380_dma_send_setup		NCR5380_dma_setup_none
     31#define NCR5380_dma_residual		NCR5380_dma_residual_none
     32
     33#define NCR5380_implementation_fields	/* none */
     34
     35#include "NCR5380.h"
     36#include "NCR5380.c"
     37
     38#define DMX3191D_DRIVER_NAME	"dmx3191d"
     39#define DMX3191D_REGION_LEN	8
     40
     41
     42static struct scsi_host_template dmx3191d_driver_template = {
     43	.module			= THIS_MODULE,
     44	.proc_name		= DMX3191D_DRIVER_NAME,
     45	.name			= "Domex DMX3191D",
     46	.info			= NCR5380_info,
     47	.queuecommand		= NCR5380_queue_command,
     48	.eh_abort_handler	= NCR5380_abort,
     49	.eh_host_reset_handler	= NCR5380_host_reset,
     50	.can_queue		= 32,
     51	.this_id		= 7,
     52	.sg_tablesize		= SG_ALL,
     53	.cmd_per_lun		= 2,
     54	.dma_boundary		= PAGE_SIZE - 1,
     55	.cmd_size		= sizeof(struct NCR5380_cmd),
     56};
     57
     58static int dmx3191d_probe_one(struct pci_dev *pdev,
     59			      const struct pci_device_id *id)
     60{
     61	struct Scsi_Host *shost;
     62	struct NCR5380_hostdata *hostdata;
     63	unsigned long io;
     64	int error = -ENODEV;
     65
     66	if (pci_enable_device(pdev))
     67		goto out;
     68
     69	io = pci_resource_start(pdev, 0);
     70	if (!request_region(io, DMX3191D_REGION_LEN, DMX3191D_DRIVER_NAME)) {
     71		printk(KERN_ERR "dmx3191: region 0x%lx-0x%lx already reserved\n",
     72				io, io + DMX3191D_REGION_LEN);
     73		goto out_disable_device;
     74	}
     75
     76	shost = scsi_host_alloc(&dmx3191d_driver_template,
     77			sizeof(struct NCR5380_hostdata));
     78	if (!shost)
     79		goto out_release_region;       
     80
     81	hostdata = shost_priv(shost);
     82	hostdata->base = io;
     83
     84	/* This card does not seem to raise an interrupt on pdev->irq.
     85	 * Steam-powered SCSI controllers run without an IRQ anyway.
     86	 */
     87	shost->irq = NO_IRQ;
     88
     89	error = NCR5380_init(shost, 0);
     90	if (error)
     91		goto out_host_put;
     92
     93	NCR5380_maybe_reset_bus(shost);
     94
     95	pci_set_drvdata(pdev, shost);
     96
     97	error = scsi_add_host(shost, &pdev->dev);
     98	if (error)
     99		goto out_exit;
    100
    101	scsi_scan_host(shost);
    102	return 0;
    103
    104out_exit:
    105	NCR5380_exit(shost);
    106out_host_put:
    107	scsi_host_put(shost);
    108 out_release_region:
    109	release_region(io, DMX3191D_REGION_LEN);
    110 out_disable_device:
    111	pci_disable_device(pdev);
    112 out:
    113	return error;
    114}
    115
    116static void dmx3191d_remove_one(struct pci_dev *pdev)
    117{
    118	struct Scsi_Host *shost = pci_get_drvdata(pdev);
    119	struct NCR5380_hostdata *hostdata = shost_priv(shost);
    120	unsigned long io = hostdata->base;
    121
    122	scsi_remove_host(shost);
    123
    124	NCR5380_exit(shost);
    125	scsi_host_put(shost);
    126	release_region(io, DMX3191D_REGION_LEN);
    127	pci_disable_device(pdev);
    128}
    129
    130static struct pci_device_id dmx3191d_pci_tbl[] = {
    131	{PCI_VENDOR_ID_DOMEX, PCI_DEVICE_ID_DOMEX_DMX3191D,
    132		PCI_ANY_ID, PCI_ANY_ID, 0, 0, 4},
    133	{ }
    134};
    135MODULE_DEVICE_TABLE(pci, dmx3191d_pci_tbl);
    136
    137static struct pci_driver dmx3191d_pci_driver = {
    138	.name		= DMX3191D_DRIVER_NAME,
    139	.id_table	= dmx3191d_pci_tbl,
    140	.probe		= dmx3191d_probe_one,
    141	.remove		= dmx3191d_remove_one,
    142};
    143
    144module_pci_driver(dmx3191d_pci_driver);
    145
    146MODULE_AUTHOR("Massimo Piccioni <dafastidio@libero.it>");
    147MODULE_DESCRIPTION("Domex DMX3191D SCSI driver");
    148MODULE_LICENSE("GPL");