mirror of https://gitee.com/openkylin/linux.git
973 lines
23 KiB
C
973 lines
23 KiB
C
/*
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* Copyright (C) 1994-1998 Linus Torvalds & authors (see below)
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* Copyrifht (C) 2003-2005, 2007 Bartlomiej Zolnierkiewicz
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*/
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/*
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* Mostly written by Mark Lord <mlord@pobox.com>
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* and Gadi Oxman <gadio@netvision.net.il>
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* and Andre Hedrick <andre@linux-ide.org>
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*
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* See linux/MAINTAINERS for address of current maintainer.
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*
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* This is the multiple IDE interface driver, as evolved from hd.c.
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* It supports up to MAX_HWIFS IDE interfaces, on one or more IRQs
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* (usually 14 & 15).
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* There can be up to two drives per interface, as per the ATA-2 spec.
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*
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* ...
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*
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* From hd.c:
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* |
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* | It traverses the request-list, using interrupts to jump between functions.
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* | As nearly all functions can be called within interrupts, we may not sleep.
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* | Special care is recommended. Have Fun!
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* |
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* | modified by Drew Eckhardt to check nr of hd's from the CMOS.
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* |
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* | Thanks to Branko Lankester, lankeste@fwi.uva.nl, who found a bug
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* | in the early extended-partition checks and added DM partitions.
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* |
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* | Early work on error handling by Mika Liljeberg (liljeber@cs.Helsinki.FI).
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* |
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* | IRQ-unmask, drive-id, multiple-mode, support for ">16 heads",
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* | and general streamlining by Mark Lord (mlord@pobox.com).
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*
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* October, 1994 -- Complete line-by-line overhaul for linux 1.1.x, by:
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*
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* Mark Lord (mlord@pobox.com) (IDE Perf.Pkg)
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* Delman Lee (delman@ieee.org) ("Mr. atdisk2")
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* Scott Snyder (snyder@fnald0.fnal.gov) (ATAPI IDE cd-rom)
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*
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* This was a rewrite of just about everything from hd.c, though some original
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* code is still sprinkled about. Think of it as a major evolution, with
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* inspiration from lots of linux users, esp. hamish@zot.apana.org.au
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*/
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#define _IDE_C /* Tell ide.h it's really us */
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#include <linux/module.h>
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#include <linux/types.h>
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#include <linux/string.h>
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#include <linux/kernel.h>
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#include <linux/interrupt.h>
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#include <linux/major.h>
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#include <linux/errno.h>
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#include <linux/genhd.h>
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#include <linux/slab.h>
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#include <linux/init.h>
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#include <linux/pci.h>
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#include <linux/ide.h>
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#include <linux/completion.h>
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#include <linux/device.h>
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/* default maximum number of failures */
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#define IDE_DEFAULT_MAX_FAILURES 1
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struct class *ide_port_class;
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static const u8 ide_hwif_to_major[] = { IDE0_MAJOR, IDE1_MAJOR,
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IDE2_MAJOR, IDE3_MAJOR,
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IDE4_MAJOR, IDE5_MAJOR,
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IDE6_MAJOR, IDE7_MAJOR,
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IDE8_MAJOR, IDE9_MAJOR };
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DEFINE_MUTEX(ide_cfg_mtx);
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__cacheline_aligned_in_smp DEFINE_SPINLOCK(ide_lock);
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EXPORT_SYMBOL(ide_lock);
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static void ide_port_init_devices_data(ide_hwif_t *);
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/*
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* Do not even *think* about calling this!
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*/
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void ide_init_port_data(ide_hwif_t *hwif, unsigned int index)
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{
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/* bulk initialize hwif & drive info with zeros */
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memset(hwif, 0, sizeof(ide_hwif_t));
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/* fill in any non-zero initial values */
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hwif->index = index;
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hwif->major = ide_hwif_to_major[index];
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hwif->name[0] = 'i';
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hwif->name[1] = 'd';
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hwif->name[2] = 'e';
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hwif->name[3] = '0' + index;
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hwif->bus_state = BUSSTATE_ON;
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init_completion(&hwif->gendev_rel_comp);
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hwif->tp_ops = &default_tp_ops;
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ide_port_init_devices_data(hwif);
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}
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static void ide_port_init_devices_data(ide_hwif_t *hwif)
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{
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int unit;
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for (unit = 0; unit < MAX_DRIVES; ++unit) {
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ide_drive_t *drive = &hwif->drives[unit];
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u8 j = (hwif->index * MAX_DRIVES) + unit;
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memset(drive, 0, sizeof(*drive));
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drive->media = ide_disk;
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drive->select.all = (unit<<4)|0xa0;
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drive->hwif = hwif;
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drive->ready_stat = READY_STAT;
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drive->bad_wstat = BAD_W_STAT;
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drive->special.b.recalibrate = 1;
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drive->special.b.set_geometry = 1;
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drive->name[0] = 'h';
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drive->name[1] = 'd';
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drive->name[2] = 'a' + j;
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drive->max_failures = IDE_DEFAULT_MAX_FAILURES;
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INIT_LIST_HEAD(&drive->list);
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init_completion(&drive->gendev_rel_comp);
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}
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}
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/* Called with ide_lock held. */
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static void __ide_port_unregister_devices(ide_hwif_t *hwif)
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{
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int i;
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for (i = 0; i < MAX_DRIVES; i++) {
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ide_drive_t *drive = &hwif->drives[i];
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if (drive->present) {
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spin_unlock_irq(&ide_lock);
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device_unregister(&drive->gendev);
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wait_for_completion(&drive->gendev_rel_comp);
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spin_lock_irq(&ide_lock);
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}
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}
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}
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void ide_port_unregister_devices(ide_hwif_t *hwif)
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{
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mutex_lock(&ide_cfg_mtx);
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spin_lock_irq(&ide_lock);
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__ide_port_unregister_devices(hwif);
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hwif->present = 0;
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ide_port_init_devices_data(hwif);
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spin_unlock_irq(&ide_lock);
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mutex_unlock(&ide_cfg_mtx);
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}
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EXPORT_SYMBOL_GPL(ide_port_unregister_devices);
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/**
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* ide_unregister - free an IDE interface
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* @hwif: IDE interface
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*
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* Perform the final unregister of an IDE interface. At the moment
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* we don't refcount interfaces so this will also get split up.
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*
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* Locking:
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* The caller must not hold the IDE locks
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* The drive present/vanishing is not yet properly locked
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* Take care with the callbacks. These have been split to avoid
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* deadlocking the IDE layer. The shutdown callback is called
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* before we take the lock and free resources. It is up to the
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* caller to be sure there is no pending I/O here, and that
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* the interface will not be reopened (present/vanishing locking
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* isn't yet done BTW). After we commit to the final kill we
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* call the cleanup callback with the ide locks held.
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*
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* Unregister restores the hwif structures to the default state.
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* This is raving bonkers.
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*/
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void ide_unregister(ide_hwif_t *hwif)
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{
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ide_hwif_t *g;
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ide_hwgroup_t *hwgroup;
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int irq_count = 0;
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BUG_ON(in_interrupt());
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BUG_ON(irqs_disabled());
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mutex_lock(&ide_cfg_mtx);
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spin_lock_irq(&ide_lock);
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if (hwif->present) {
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__ide_port_unregister_devices(hwif);
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hwif->present = 0;
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}
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spin_unlock_irq(&ide_lock);
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ide_proc_unregister_port(hwif);
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hwgroup = hwif->hwgroup;
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/*
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* free the irq if we were the only hwif using it
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*/
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g = hwgroup->hwif;
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do {
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if (g->irq == hwif->irq)
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++irq_count;
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g = g->next;
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} while (g != hwgroup->hwif);
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if (irq_count == 1)
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free_irq(hwif->irq, hwgroup);
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ide_remove_port_from_hwgroup(hwif);
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device_unregister(hwif->portdev);
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device_unregister(&hwif->gendev);
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wait_for_completion(&hwif->gendev_rel_comp);
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/*
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* Remove us from the kernel's knowledge
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*/
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blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS);
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kfree(hwif->sg_table);
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unregister_blkdev(hwif->major, hwif->name);
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if (hwif->dma_base)
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ide_release_dma_engine(hwif);
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spin_lock_irq(&ide_lock);
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/* restore hwif data to pristine status */
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ide_init_port_data(hwif, hwif->index);
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spin_unlock_irq(&ide_lock);
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mutex_unlock(&ide_cfg_mtx);
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}
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void ide_init_port_hw(ide_hwif_t *hwif, hw_regs_t *hw)
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{
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memcpy(&hwif->io_ports, &hw->io_ports, sizeof(hwif->io_ports));
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hwif->irq = hw->irq;
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hwif->chipset = hw->chipset;
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hwif->dev = hw->dev;
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hwif->gendev.parent = hw->parent ? hw->parent : hw->dev;
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hwif->ack_intr = hw->ack_intr;
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hwif->config_data = hw->config;
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}
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/*
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* Locks for IDE setting functionality
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*/
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DEFINE_MUTEX(ide_setting_mtx);
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EXPORT_SYMBOL_GPL(ide_setting_mtx);
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/**
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* ide_spin_wait_hwgroup - wait for group
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* @drive: drive in the group
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*
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* Wait for an IDE device group to go non busy and then return
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* holding the ide_lock which guards the hwgroup->busy status
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* and right to use it.
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*/
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int ide_spin_wait_hwgroup (ide_drive_t *drive)
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{
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ide_hwgroup_t *hwgroup = HWGROUP(drive);
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unsigned long timeout = jiffies + (3 * HZ);
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spin_lock_irq(&ide_lock);
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while (hwgroup->busy) {
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unsigned long lflags;
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spin_unlock_irq(&ide_lock);
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local_irq_set(lflags);
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if (time_after(jiffies, timeout)) {
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local_irq_restore(lflags);
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printk(KERN_ERR "%s: channel busy\n", drive->name);
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return -EBUSY;
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}
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local_irq_restore(lflags);
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spin_lock_irq(&ide_lock);
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}
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return 0;
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}
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EXPORT_SYMBOL(ide_spin_wait_hwgroup);
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int set_io_32bit(ide_drive_t *drive, int arg)
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{
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if (drive->no_io_32bit)
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return -EPERM;
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if (arg < 0 || arg > 1 + (SUPPORT_VLB_SYNC << 1))
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return -EINVAL;
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if (ide_spin_wait_hwgroup(drive))
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return -EBUSY;
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drive->io_32bit = arg;
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spin_unlock_irq(&ide_lock);
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return 0;
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}
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static int set_ksettings(ide_drive_t *drive, int arg)
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{
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if (arg < 0 || arg > 1)
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return -EINVAL;
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if (ide_spin_wait_hwgroup(drive))
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return -EBUSY;
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drive->keep_settings = arg;
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spin_unlock_irq(&ide_lock);
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return 0;
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}
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int set_using_dma(ide_drive_t *drive, int arg)
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{
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#ifdef CONFIG_BLK_DEV_IDEDMA
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ide_hwif_t *hwif = drive->hwif;
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int err = -EPERM;
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if (arg < 0 || arg > 1)
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return -EINVAL;
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if (!drive->id || !(drive->id->capability & 1))
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goto out;
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if (hwif->dma_ops == NULL)
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goto out;
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err = -EBUSY;
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if (ide_spin_wait_hwgroup(drive))
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goto out;
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/*
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* set ->busy flag, unlock and let it ride
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*/
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hwif->hwgroup->busy = 1;
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spin_unlock_irq(&ide_lock);
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err = 0;
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if (arg) {
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if (ide_set_dma(drive))
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err = -EIO;
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} else
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ide_dma_off(drive);
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/*
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* lock, clear ->busy flag and unlock before leaving
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*/
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spin_lock_irq(&ide_lock);
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hwif->hwgroup->busy = 0;
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spin_unlock_irq(&ide_lock);
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out:
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return err;
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#else
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if (arg < 0 || arg > 1)
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return -EINVAL;
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return -EPERM;
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#endif
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}
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int set_pio_mode(ide_drive_t *drive, int arg)
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{
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struct request *rq;
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ide_hwif_t *hwif = drive->hwif;
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const struct ide_port_ops *port_ops = hwif->port_ops;
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if (arg < 0 || arg > 255)
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return -EINVAL;
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if (port_ops == NULL || port_ops->set_pio_mode == NULL ||
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(hwif->host_flags & IDE_HFLAG_NO_SET_MODE))
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return -ENOSYS;
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if (drive->special.b.set_tune)
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return -EBUSY;
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rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
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rq->cmd_type = REQ_TYPE_ATA_TASKFILE;
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drive->tune_req = (u8) arg;
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drive->special.b.set_tune = 1;
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blk_execute_rq(drive->queue, NULL, rq, 0);
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blk_put_request(rq);
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return 0;
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}
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static int set_unmaskirq(ide_drive_t *drive, int arg)
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{
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if (drive->no_unmask)
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return -EPERM;
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if (arg < 0 || arg > 1)
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return -EINVAL;
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if (ide_spin_wait_hwgroup(drive))
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return -EBUSY;
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drive->unmask = arg;
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spin_unlock_irq(&ide_lock);
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return 0;
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}
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static int generic_ide_suspend(struct device *dev, pm_message_t mesg)
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{
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ide_drive_t *drive = dev->driver_data;
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ide_hwif_t *hwif = HWIF(drive);
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struct request *rq;
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struct request_pm_state rqpm;
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ide_task_t args;
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int ret;
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/* Call ACPI _GTM only once */
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if (!(drive->dn % 2))
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ide_acpi_get_timing(hwif);
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memset(&rqpm, 0, sizeof(rqpm));
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memset(&args, 0, sizeof(args));
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rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
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rq->cmd_type = REQ_TYPE_PM_SUSPEND;
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rq->special = &args;
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rq->data = &rqpm;
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rqpm.pm_step = ide_pm_state_start_suspend;
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if (mesg.event == PM_EVENT_PRETHAW)
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mesg.event = PM_EVENT_FREEZE;
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rqpm.pm_state = mesg.event;
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ret = blk_execute_rq(drive->queue, NULL, rq, 0);
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blk_put_request(rq);
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/* only call ACPI _PS3 after both drivers are suspended */
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if (!ret && (((drive->dn % 2) && hwif->drives[0].present
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&& hwif->drives[1].present)
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|| !hwif->drives[0].present
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|| !hwif->drives[1].present))
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ide_acpi_set_state(hwif, 0);
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return ret;
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}
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static int generic_ide_resume(struct device *dev)
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{
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ide_drive_t *drive = dev->driver_data;
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ide_hwif_t *hwif = HWIF(drive);
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struct request *rq;
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struct request_pm_state rqpm;
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ide_task_t args;
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int err;
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/* Call ACPI _STM only once */
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if (!(drive->dn % 2)) {
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ide_acpi_set_state(hwif, 1);
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ide_acpi_push_timing(hwif);
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}
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ide_acpi_exec_tfs(drive);
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memset(&rqpm, 0, sizeof(rqpm));
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memset(&args, 0, sizeof(args));
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rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
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rq->cmd_type = REQ_TYPE_PM_RESUME;
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rq->cmd_flags |= REQ_PREEMPT;
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rq->special = &args;
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rq->data = &rqpm;
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rqpm.pm_step = ide_pm_state_start_resume;
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rqpm.pm_state = PM_EVENT_ON;
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err = blk_execute_rq(drive->queue, NULL, rq, 1);
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blk_put_request(rq);
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if (err == 0 && dev->driver) {
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ide_driver_t *drv = to_ide_driver(dev->driver);
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if (drv->resume)
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drv->resume(drive);
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}
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return err;
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}
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static int generic_drive_reset(ide_drive_t *drive)
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{
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struct request *rq;
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int ret = 0;
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rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
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rq->cmd_type = REQ_TYPE_SPECIAL;
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rq->cmd_len = 1;
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rq->cmd[0] = REQ_DRIVE_RESET;
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rq->cmd_flags |= REQ_SOFTBARRIER;
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if (blk_execute_rq(drive->queue, NULL, rq, 1))
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ret = rq->errors;
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blk_put_request(rq);
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return ret;
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}
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int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev,
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unsigned int cmd, unsigned long arg)
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{
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unsigned long flags;
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ide_driver_t *drv;
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void __user *p = (void __user *)arg;
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int err = 0, (*setfunc)(ide_drive_t *, int);
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u8 *val;
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|
|
switch (cmd) {
|
|
case HDIO_GET_32BIT: val = &drive->io_32bit; goto read_val;
|
|
case HDIO_GET_KEEPSETTINGS: val = &drive->keep_settings; goto read_val;
|
|
case HDIO_GET_UNMASKINTR: val = &drive->unmask; goto read_val;
|
|
case HDIO_GET_DMA: val = &drive->using_dma; goto read_val;
|
|
case HDIO_SET_32BIT: setfunc = set_io_32bit; goto set_val;
|
|
case HDIO_SET_KEEPSETTINGS: setfunc = set_ksettings; goto set_val;
|
|
case HDIO_SET_PIO_MODE: setfunc = set_pio_mode; goto set_val;
|
|
case HDIO_SET_UNMASKINTR: setfunc = set_unmaskirq; goto set_val;
|
|
case HDIO_SET_DMA: setfunc = set_using_dma; goto set_val;
|
|
}
|
|
|
|
switch (cmd) {
|
|
case HDIO_OBSOLETE_IDENTITY:
|
|
case HDIO_GET_IDENTITY:
|
|
if (bdev != bdev->bd_contains)
|
|
return -EINVAL;
|
|
if (drive->id_read == 0)
|
|
return -ENOMSG;
|
|
if (copy_to_user(p, drive->id, (cmd == HDIO_GET_IDENTITY) ? sizeof(*drive->id) : 142))
|
|
return -EFAULT;
|
|
return 0;
|
|
|
|
case HDIO_GET_NICE:
|
|
return put_user(drive->dsc_overlap << IDE_NICE_DSC_OVERLAP |
|
|
drive->atapi_overlap << IDE_NICE_ATAPI_OVERLAP |
|
|
drive->nice1 << IDE_NICE_1,
|
|
(long __user *) arg);
|
|
#ifdef CONFIG_IDE_TASK_IOCTL
|
|
case HDIO_DRIVE_TASKFILE:
|
|
if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
|
|
return -EACCES;
|
|
switch(drive->media) {
|
|
case ide_disk:
|
|
return ide_taskfile_ioctl(drive, cmd, arg);
|
|
default:
|
|
return -ENOMSG;
|
|
}
|
|
#endif /* CONFIG_IDE_TASK_IOCTL */
|
|
|
|
case HDIO_DRIVE_CMD:
|
|
if (!capable(CAP_SYS_RAWIO))
|
|
return -EACCES;
|
|
return ide_cmd_ioctl(drive, cmd, arg);
|
|
|
|
case HDIO_DRIVE_TASK:
|
|
if (!capable(CAP_SYS_RAWIO))
|
|
return -EACCES;
|
|
return ide_task_ioctl(drive, cmd, arg);
|
|
case HDIO_SET_NICE:
|
|
if (!capable(CAP_SYS_ADMIN)) return -EACCES;
|
|
if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1))))
|
|
return -EPERM;
|
|
drive->dsc_overlap = (arg >> IDE_NICE_DSC_OVERLAP) & 1;
|
|
drv = *(ide_driver_t **)bdev->bd_disk->private_data;
|
|
if (drive->dsc_overlap && !drv->supports_dsc_overlap) {
|
|
drive->dsc_overlap = 0;
|
|
return -EPERM;
|
|
}
|
|
drive->nice1 = (arg >> IDE_NICE_1) & 1;
|
|
return 0;
|
|
case HDIO_DRIVE_RESET:
|
|
if (!capable(CAP_SYS_ADMIN))
|
|
return -EACCES;
|
|
|
|
return generic_drive_reset(drive);
|
|
|
|
case HDIO_GET_BUSSTATE:
|
|
if (!capable(CAP_SYS_ADMIN))
|
|
return -EACCES;
|
|
if (put_user(HWIF(drive)->bus_state, (long __user *)arg))
|
|
return -EFAULT;
|
|
return 0;
|
|
|
|
case HDIO_SET_BUSSTATE:
|
|
if (!capable(CAP_SYS_ADMIN))
|
|
return -EACCES;
|
|
return -EOPNOTSUPP;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
read_val:
|
|
mutex_lock(&ide_setting_mtx);
|
|
spin_lock_irqsave(&ide_lock, flags);
|
|
err = *val;
|
|
spin_unlock_irqrestore(&ide_lock, flags);
|
|
mutex_unlock(&ide_setting_mtx);
|
|
return err >= 0 ? put_user(err, (long __user *)arg) : err;
|
|
|
|
set_val:
|
|
if (bdev != bdev->bd_contains)
|
|
err = -EINVAL;
|
|
else {
|
|
if (!capable(CAP_SYS_ADMIN))
|
|
err = -EACCES;
|
|
else {
|
|
mutex_lock(&ide_setting_mtx);
|
|
err = setfunc(drive, arg);
|
|
mutex_unlock(&ide_setting_mtx);
|
|
}
|
|
}
|
|
return err;
|
|
}
|
|
|
|
EXPORT_SYMBOL(generic_ide_ioctl);
|
|
|
|
static int ide_bus_match(struct device *dev, struct device_driver *drv)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
static char *media_string(ide_drive_t *drive)
|
|
{
|
|
switch (drive->media) {
|
|
case ide_disk:
|
|
return "disk";
|
|
case ide_cdrom:
|
|
return "cdrom";
|
|
case ide_tape:
|
|
return "tape";
|
|
case ide_floppy:
|
|
return "floppy";
|
|
case ide_optical:
|
|
return "optical";
|
|
default:
|
|
return "UNKNOWN";
|
|
}
|
|
}
|
|
|
|
static ssize_t media_show(struct device *dev, struct device_attribute *attr, char *buf)
|
|
{
|
|
ide_drive_t *drive = to_ide_device(dev);
|
|
return sprintf(buf, "%s\n", media_string(drive));
|
|
}
|
|
|
|
static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf)
|
|
{
|
|
ide_drive_t *drive = to_ide_device(dev);
|
|
return sprintf(buf, "%s\n", drive->name);
|
|
}
|
|
|
|
static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
|
|
{
|
|
ide_drive_t *drive = to_ide_device(dev);
|
|
return sprintf(buf, "ide:m-%s\n", media_string(drive));
|
|
}
|
|
|
|
static ssize_t model_show(struct device *dev, struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
ide_drive_t *drive = to_ide_device(dev);
|
|
return sprintf(buf, "%s\n", drive->id->model);
|
|
}
|
|
|
|
static ssize_t firmware_show(struct device *dev, struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
ide_drive_t *drive = to_ide_device(dev);
|
|
return sprintf(buf, "%s\n", drive->id->fw_rev);
|
|
}
|
|
|
|
static ssize_t serial_show(struct device *dev, struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
ide_drive_t *drive = to_ide_device(dev);
|
|
return sprintf(buf, "%s\n", drive->id->serial_no);
|
|
}
|
|
|
|
static struct device_attribute ide_dev_attrs[] = {
|
|
__ATTR_RO(media),
|
|
__ATTR_RO(drivename),
|
|
__ATTR_RO(modalias),
|
|
__ATTR_RO(model),
|
|
__ATTR_RO(firmware),
|
|
__ATTR(serial, 0400, serial_show, NULL),
|
|
__ATTR_NULL
|
|
};
|
|
|
|
static int ide_uevent(struct device *dev, struct kobj_uevent_env *env)
|
|
{
|
|
ide_drive_t *drive = to_ide_device(dev);
|
|
|
|
add_uevent_var(env, "MEDIA=%s", media_string(drive));
|
|
add_uevent_var(env, "DRIVENAME=%s", drive->name);
|
|
add_uevent_var(env, "MODALIAS=ide:m-%s", media_string(drive));
|
|
return 0;
|
|
}
|
|
|
|
static int generic_ide_probe(struct device *dev)
|
|
{
|
|
ide_drive_t *drive = to_ide_device(dev);
|
|
ide_driver_t *drv = to_ide_driver(dev->driver);
|
|
|
|
return drv->probe ? drv->probe(drive) : -ENODEV;
|
|
}
|
|
|
|
static int generic_ide_remove(struct device *dev)
|
|
{
|
|
ide_drive_t *drive = to_ide_device(dev);
|
|
ide_driver_t *drv = to_ide_driver(dev->driver);
|
|
|
|
if (drv->remove)
|
|
drv->remove(drive);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void generic_ide_shutdown(struct device *dev)
|
|
{
|
|
ide_drive_t *drive = to_ide_device(dev);
|
|
ide_driver_t *drv = to_ide_driver(dev->driver);
|
|
|
|
if (dev->driver && drv->shutdown)
|
|
drv->shutdown(drive);
|
|
}
|
|
|
|
struct bus_type ide_bus_type = {
|
|
.name = "ide",
|
|
.match = ide_bus_match,
|
|
.uevent = ide_uevent,
|
|
.probe = generic_ide_probe,
|
|
.remove = generic_ide_remove,
|
|
.shutdown = generic_ide_shutdown,
|
|
.dev_attrs = ide_dev_attrs,
|
|
.suspend = generic_ide_suspend,
|
|
.resume = generic_ide_resume,
|
|
};
|
|
|
|
EXPORT_SYMBOL_GPL(ide_bus_type);
|
|
|
|
int ide_vlb_clk;
|
|
EXPORT_SYMBOL_GPL(ide_vlb_clk);
|
|
|
|
module_param_named(vlb_clock, ide_vlb_clk, int, 0);
|
|
MODULE_PARM_DESC(vlb_clock, "VLB clock frequency (in MHz)");
|
|
|
|
int ide_pci_clk;
|
|
EXPORT_SYMBOL_GPL(ide_pci_clk);
|
|
|
|
module_param_named(pci_clock, ide_pci_clk, int, 0);
|
|
MODULE_PARM_DESC(pci_clock, "PCI bus clock frequency (in MHz)");
|
|
|
|
static int ide_set_dev_param_mask(const char *s, struct kernel_param *kp)
|
|
{
|
|
int a, b, i, j = 1;
|
|
unsigned int *dev_param_mask = (unsigned int *)kp->arg;
|
|
|
|
if (sscanf(s, "%d.%d:%d", &a, &b, &j) != 3 &&
|
|
sscanf(s, "%d.%d", &a, &b) != 2)
|
|
return -EINVAL;
|
|
|
|
i = a * MAX_DRIVES + b;
|
|
|
|
if (i >= MAX_HWIFS * MAX_DRIVES || j < 0 || j > 1)
|
|
return -EINVAL;
|
|
|
|
if (j)
|
|
*dev_param_mask |= (1 << i);
|
|
else
|
|
*dev_param_mask &= (1 << i);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static unsigned int ide_nodma;
|
|
|
|
module_param_call(nodma, ide_set_dev_param_mask, NULL, &ide_nodma, 0);
|
|
MODULE_PARM_DESC(nodma, "disallow DMA for a device");
|
|
|
|
static unsigned int ide_noflush;
|
|
|
|
module_param_call(noflush, ide_set_dev_param_mask, NULL, &ide_noflush, 0);
|
|
MODULE_PARM_DESC(noflush, "disable flush requests for a device");
|
|
|
|
static unsigned int ide_noprobe;
|
|
|
|
module_param_call(noprobe, ide_set_dev_param_mask, NULL, &ide_noprobe, 0);
|
|
MODULE_PARM_DESC(noprobe, "skip probing for a device");
|
|
|
|
static unsigned int ide_nowerr;
|
|
|
|
module_param_call(nowerr, ide_set_dev_param_mask, NULL, &ide_nowerr, 0);
|
|
MODULE_PARM_DESC(nowerr, "ignore the WRERR_STAT bit for a device");
|
|
|
|
static unsigned int ide_cdroms;
|
|
|
|
module_param_call(cdrom, ide_set_dev_param_mask, NULL, &ide_cdroms, 0);
|
|
MODULE_PARM_DESC(cdrom, "force device as a CD-ROM");
|
|
|
|
struct chs_geom {
|
|
unsigned int cyl;
|
|
u8 head;
|
|
u8 sect;
|
|
};
|
|
|
|
static unsigned int ide_disks;
|
|
static struct chs_geom ide_disks_chs[MAX_HWIFS * MAX_DRIVES];
|
|
|
|
static int ide_set_disk_chs(const char *str, struct kernel_param *kp)
|
|
{
|
|
int a, b, c = 0, h = 0, s = 0, i, j = 1;
|
|
|
|
if (sscanf(str, "%d.%d:%d,%d,%d", &a, &b, &c, &h, &s) != 5 &&
|
|
sscanf(str, "%d.%d:%d", &a, &b, &j) != 3)
|
|
return -EINVAL;
|
|
|
|
i = a * MAX_DRIVES + b;
|
|
|
|
if (i >= MAX_HWIFS * MAX_DRIVES || j < 0 || j > 1)
|
|
return -EINVAL;
|
|
|
|
if (c > INT_MAX || h > 255 || s > 255)
|
|
return -EINVAL;
|
|
|
|
if (j)
|
|
ide_disks |= (1 << i);
|
|
else
|
|
ide_disks &= (1 << i);
|
|
|
|
ide_disks_chs[i].cyl = c;
|
|
ide_disks_chs[i].head = h;
|
|
ide_disks_chs[i].sect = s;
|
|
|
|
return 0;
|
|
}
|
|
|
|
module_param_call(chs, ide_set_disk_chs, NULL, NULL, 0);
|
|
MODULE_PARM_DESC(chs, "force device as a disk (using CHS)");
|
|
|
|
static void ide_dev_apply_params(ide_drive_t *drive)
|
|
{
|
|
int i = drive->hwif->index * MAX_DRIVES + drive->select.b.unit;
|
|
|
|
if (ide_nodma & (1 << i)) {
|
|
printk(KERN_INFO "ide: disallowing DMA for %s\n", drive->name);
|
|
drive->nodma = 1;
|
|
}
|
|
if (ide_noflush & (1 << i)) {
|
|
printk(KERN_INFO "ide: disabling flush requests for %s\n",
|
|
drive->name);
|
|
drive->noflush = 1;
|
|
}
|
|
if (ide_noprobe & (1 << i)) {
|
|
printk(KERN_INFO "ide: skipping probe for %s\n", drive->name);
|
|
drive->noprobe = 1;
|
|
}
|
|
if (ide_nowerr & (1 << i)) {
|
|
printk(KERN_INFO "ide: ignoring the WRERR_STAT bit for %s\n",
|
|
drive->name);
|
|
drive->bad_wstat = BAD_R_STAT;
|
|
}
|
|
if (ide_cdroms & (1 << i)) {
|
|
printk(KERN_INFO "ide: forcing %s as a CD-ROM\n", drive->name);
|
|
drive->present = 1;
|
|
drive->media = ide_cdrom;
|
|
/* an ATAPI device ignores DRDY */
|
|
drive->ready_stat = 0;
|
|
}
|
|
if (ide_disks & (1 << i)) {
|
|
drive->cyl = drive->bios_cyl = ide_disks_chs[i].cyl;
|
|
drive->head = drive->bios_head = ide_disks_chs[i].head;
|
|
drive->sect = drive->bios_sect = ide_disks_chs[i].sect;
|
|
drive->forced_geom = 1;
|
|
printk(KERN_INFO "ide: forcing %s as a disk (%d/%d/%d)\n",
|
|
drive->name,
|
|
drive->cyl, drive->head, drive->sect);
|
|
drive->present = 1;
|
|
drive->media = ide_disk;
|
|
drive->ready_stat = READY_STAT;
|
|
}
|
|
}
|
|
|
|
static unsigned int ide_ignore_cable;
|
|
|
|
static int ide_set_ignore_cable(const char *s, struct kernel_param *kp)
|
|
{
|
|
int i, j = 1;
|
|
|
|
if (sscanf(s, "%d:%d", &i, &j) != 2 && sscanf(s, "%d", &i) != 1)
|
|
return -EINVAL;
|
|
|
|
if (i >= MAX_HWIFS || j < 0 || j > 1)
|
|
return -EINVAL;
|
|
|
|
if (j)
|
|
ide_ignore_cable |= (1 << i);
|
|
else
|
|
ide_ignore_cable &= (1 << i);
|
|
|
|
return 0;
|
|
}
|
|
|
|
module_param_call(ignore_cable, ide_set_ignore_cable, NULL, NULL, 0);
|
|
MODULE_PARM_DESC(ignore_cable, "ignore cable detection");
|
|
|
|
void ide_port_apply_params(ide_hwif_t *hwif)
|
|
{
|
|
int i;
|
|
|
|
if (ide_ignore_cable & (1 << hwif->index)) {
|
|
printk(KERN_INFO "ide: ignoring cable detection for %s\n",
|
|
hwif->name);
|
|
hwif->cbl = ATA_CBL_PATA40_SHORT;
|
|
}
|
|
|
|
for (i = 0; i < MAX_DRIVES; i++)
|
|
ide_dev_apply_params(&hwif->drives[i]);
|
|
}
|
|
|
|
/*
|
|
* This is gets invoked once during initialization, to set *everything* up
|
|
*/
|
|
static int __init ide_init(void)
|
|
{
|
|
int ret;
|
|
|
|
printk(KERN_INFO "Uniform Multi-Platform E-IDE driver\n");
|
|
|
|
ret = bus_register(&ide_bus_type);
|
|
if (ret < 0) {
|
|
printk(KERN_WARNING "IDE: bus_register error: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
ide_port_class = class_create(THIS_MODULE, "ide_port");
|
|
if (IS_ERR(ide_port_class)) {
|
|
ret = PTR_ERR(ide_port_class);
|
|
goto out_port_class;
|
|
}
|
|
|
|
proc_ide_create();
|
|
|
|
return 0;
|
|
|
|
out_port_class:
|
|
bus_unregister(&ide_bus_type);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void __exit ide_exit(void)
|
|
{
|
|
proc_ide_destroy();
|
|
|
|
class_destroy(ide_port_class);
|
|
|
|
bus_unregister(&ide_bus_type);
|
|
}
|
|
|
|
module_init(ide_init);
|
|
module_exit(ide_exit);
|
|
|
|
MODULE_LICENSE("GPL");
|