/*
|
/*
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* linux/arch/arm/drivers/block/hd.c
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* linux/arch/arm/drivers/block/hd.c
|
* [ origional file: linux/drivers/block/hd.c ]
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* [ origional file: linux/drivers/block/hd.c ]
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*
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*
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* Copyright (C) 1991, 1992 Linus Torvalds
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* Copyright (C) 1991, 1992 Linus Torvalds
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* Modified 1995 Russell King for ARM processor.
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* Modified 1995 Russell King for ARM processor.
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*/
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*/
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|
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/*
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/*
|
* This is the low-level hd interrupt support. It traverses the
|
* This is the low-level hd interrupt support. It traverses the
|
* request-list, using interrupts to jump between functions. As
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* request-list, using interrupts to jump between functions. As
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* all the functions are called within interrupts, we may not
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* all the functions are called within interrupts, we may not
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* sleep. Special care is recommended.
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* sleep. Special care is recommended.
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*
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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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* modified by Drew Eckhardt to check nr of hd's from the CMOS.
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*
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*
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* Thanks to Branko Lankester, lankeste@fwi.uva.nl, who found a bug
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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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* in the early extended-partition checks and added DM partitions
|
*
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*
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* IRQ-unmask, drive-id, multiple-mode, support for ">16 heads",
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* IRQ-unmask, drive-id, multiple-mode, support for ">16 heads",
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* and general streamlining by Mark Lord.
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* and general streamlining by Mark Lord.
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*/
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*/
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|
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#define DEFAULT_MULT_COUNT 0 /* set to 0 to disable multiple mode at boot */
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#define DEFAULT_MULT_COUNT 0 /* set to 0 to disable multiple mode at boot */
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#define DEFAULT_UNMASK_INTR 0 /* set to 0 to *NOT* unmask irq's more often */
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#define DEFAULT_UNMASK_INTR 0 /* set to 0 to *NOT* unmask irq's more often */
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|
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#include <asm/irq.h>
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#include <asm/irq.h>
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#include <linux/errno.h>
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#include <linux/errno.h>
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#include <linux/signal.h>
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#include <linux/signal.h>
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#include <linux/sched.h>
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#include <linux/sched.h>
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#include <linux/timer.h>
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#include <linux/timer.h>
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#include <linux/fs.h>
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#include <linux/fs.h>
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#include <linux/kernel.h>
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#include <linux/kernel.h>
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#include <linux/hdreg.h>
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#include <linux/hdreg.h>
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#include <linux/genhd.h>
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#include <linux/genhd.h>
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#include <linux/malloc.h>
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#include <linux/malloc.h>
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#include <linux/string.h>
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#include <linux/string.h>
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#include <linux/ioport.h>
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#include <linux/ioport.h>
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|
|
#define REALLY_SLOW_IO
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#define REALLY_SLOW_IO
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#include <asm/system.h>
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#include <asm/system.h>
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#include <asm/io.h>
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#include <asm/io.h>
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#include <asm/segment.h>
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#include <asm/segment.h>
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|
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#define MAJOR_NR HD_MAJOR
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#define MAJOR_NR HD_MAJOR
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#include <linux/blk.h>
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#include <linux/blk.h>
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|
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#undef HD_IRQ
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#undef HD_IRQ
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#define HD_IRQ 11
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#define HD_IRQ 11
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|
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static int revalidate_hddisk(kdev_t, int);
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static int revalidate_hddisk(kdev_t, int);
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|
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#define HD_DELAY 0
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#define HD_DELAY 0
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|
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#define MAX_ERRORS 16 /* Max read/write errors/sector */
|
#define MAX_ERRORS 16 /* Max read/write errors/sector */
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#define RESET_FREQ 8 /* Reset controller every 8th retry */
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#define RESET_FREQ 8 /* Reset controller every 8th retry */
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#define RECAL_FREQ 4 /* Recalibrate every 4th retry */
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#define RECAL_FREQ 4 /* Recalibrate every 4th retry */
|
#define MAX_HD 2
|
#define MAX_HD 2
|
|
|
#define STAT_OK (READY_STAT|SEEK_STAT)
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#define STAT_OK (READY_STAT|SEEK_STAT)
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#define OK_STATUS(s) (((s)&(STAT_OK|(BUSY_STAT|WRERR_STAT|ERR_STAT)))==STAT_OK)
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#define OK_STATUS(s) (((s)&(STAT_OK|(BUSY_STAT|WRERR_STAT|ERR_STAT)))==STAT_OK)
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|
|
static void recal_intr(void);
|
static void recal_intr(void);
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static void bad_rw_intr(void);
|
static void bad_rw_intr(void);
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|
|
static char recalibrate[MAX_HD];
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static char recalibrate[MAX_HD];
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static char special_op[MAX_HD];
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static char special_op[MAX_HD];
|
static int access_count[MAX_HD];
|
static int access_count[MAX_HD];
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static char busy[MAX_HD];
|
static char busy[MAX_HD];
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static struct wait_queue * busy_wait;
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static struct wait_queue * busy_wait;
|
|
|
static int reset;
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static int reset;
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static int hd_error;
|
static int hd_error;
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|
|
/*
|
/*
|
* This struct defines the HD's and their types.
|
* This struct defines the HD's and their types.
|
*/
|
*/
|
struct hd_i_struct {
|
struct hd_i_struct {
|
unsigned int head,sect,cyl,wpcom,lzone,ctl;
|
unsigned int head,sect,cyl,wpcom,lzone,ctl;
|
};
|
};
|
static struct hd_driveid *hd_ident_info[MAX_HD];
|
static struct hd_driveid *hd_ident_info[MAX_HD];
|
|
|
#ifdef HD_TYPE
|
#ifdef HD_TYPE
|
static struct hd_i_struct hd_info[] = { HD_TYPE };
|
static struct hd_i_struct hd_info[] = { HD_TYPE };
|
struct hd_i_struct bios_info[] = { HD_TYPE };
|
struct hd_i_struct bios_info[] = { HD_TYPE };
|
static int NR_HD = ((sizeof (hd_info))/(sizeof (struct hd_i_struct)));
|
static int NR_HD = ((sizeof (hd_info))/(sizeof (struct hd_i_struct)));
|
#else
|
#else
|
static struct hd_i_struct hd_info[MAX_HD];
|
static struct hd_i_struct hd_info[MAX_HD];
|
struct hd_i_struct bios_info[MAX_HD];
|
struct hd_i_struct bios_info[MAX_HD];
|
static int NR_HD;
|
static int NR_HD;
|
#endif
|
#endif
|
|
|
static struct hd_struct hd[MAX_HD<<6];
|
static struct hd_struct hd[MAX_HD<<6];
|
static int hd_sizes[MAX_HD<<6];
|
static int hd_sizes[MAX_HD<<6];
|
static int hd_blocksizes[MAX_HD<<6];
|
static int hd_blocksizes[MAX_HD<<6];
|
static int hd_hardsectsizes[MAX_HD<<6];
|
static int hd_hardsectsizes[MAX_HD<<6];
|
|
|
#if (HD_DELAY > 0)
|
#if (HD_DELAY > 0)
|
unsigned long last_req;
|
unsigned long last_req;
|
|
|
unsigned long read_timer(void)
|
unsigned long read_timer(void)
|
{
|
{
|
unsigned long t, flags;
|
unsigned long t, flags;
|
int i;
|
int i;
|
|
|
save_flags_cli (flags);
|
save_flags_cli (flags);
|
t = jiffies * 11932;
|
t = jiffies * 11932;
|
outb_p(0, 0x43);
|
outb_p(0, 0x43);
|
i = inb_p(0x40);
|
i = inb_p(0x40);
|
i |= inb(0x40) << 8;
|
i |= inb(0x40) << 8;
|
restore_flags(flags);
|
restore_flags(flags);
|
return(t - i);
|
return(t - i);
|
}
|
}
|
#endif
|
#endif
|
|
|
void hd_setup(char *str, int *ints)
|
void hd_setup(char *str, int *ints)
|
{
|
{
|
int hdind = 0;
|
int hdind = 0;
|
|
|
if (ints[0] != 3)
|
if (ints[0] != 3)
|
return;
|
return;
|
if (bios_info[0].head != 0)
|
if (bios_info[0].head != 0)
|
hdind=1;
|
hdind=1;
|
bios_info[hdind].head = hd_info[hdind].head = ints[2];
|
bios_info[hdind].head = hd_info[hdind].head = ints[2];
|
bios_info[hdind].sect = hd_info[hdind].sect = ints[3];
|
bios_info[hdind].sect = hd_info[hdind].sect = ints[3];
|
bios_info[hdind].cyl = hd_info[hdind].cyl = ints[1];
|
bios_info[hdind].cyl = hd_info[hdind].cyl = ints[1];
|
bios_info[hdind].wpcom = hd_info[hdind].wpcom = 0;
|
bios_info[hdind].wpcom = hd_info[hdind].wpcom = 0;
|
bios_info[hdind].lzone = hd_info[hdind].lzone = ints[1];
|
bios_info[hdind].lzone = hd_info[hdind].lzone = ints[1];
|
bios_info[hdind].ctl = hd_info[hdind].ctl = (ints[2] > 8 ? 8 : 0);
|
bios_info[hdind].ctl = hd_info[hdind].ctl = (ints[2] > 8 ? 8 : 0);
|
NR_HD = hdind+1;
|
NR_HD = hdind+1;
|
}
|
}
|
|
|
static void dump_status (const char *msg, unsigned int stat)
|
static void dump_status (const char *msg, unsigned int stat)
|
{
|
{
|
unsigned long flags;
|
unsigned long flags;
|
char devc;
|
char devc;
|
|
|
devc = CURRENT ? 'a' + DEVICE_NR(CURRENT->rq_dev) : '?';
|
devc = CURRENT ? 'a' + DEVICE_NR(CURRENT->rq_dev) : '?';
|
save_flags (flags);
|
save_flags (flags);
|
sti();
|
sti();
|
printk("hd%c: %s: status=0x%02x { ", devc, msg, stat & 0xff);
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printk("hd%c: %s: status=0x%02x { ", devc, msg, stat & 0xff);
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if (stat & BUSY_STAT) printk("Busy ");
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if (stat & BUSY_STAT) printk("Busy ");
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if (stat & READY_STAT) printk("DriveReady ");
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if (stat & READY_STAT) printk("DriveReady ");
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if (stat & WRERR_STAT) printk("WriteFault ");
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if (stat & WRERR_STAT) printk("WriteFault ");
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if (stat & SEEK_STAT) printk("SeekComplete ");
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if (stat & SEEK_STAT) printk("SeekComplete ");
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if (stat & DRQ_STAT) printk("DataRequest ");
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if (stat & DRQ_STAT) printk("DataRequest ");
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if (stat & ECC_STAT) printk("CorrectedError ");
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if (stat & ECC_STAT) printk("CorrectedError ");
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if (stat & INDEX_STAT) printk("Index ");
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if (stat & INDEX_STAT) printk("Index ");
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if (stat & ERR_STAT) printk("Error ");
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if (stat & ERR_STAT) printk("Error ");
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printk("}\n");
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printk("}\n");
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if ((stat & ERR_STAT) == 0) {
|
if ((stat & ERR_STAT) == 0) {
|
hd_error = 0;
|
hd_error = 0;
|
} else {
|
} else {
|
hd_error = inb(HD_ERROR);
|
hd_error = inb(HD_ERROR);
|
printk("hd%c: %s: error=0x%02x { ", devc, msg, hd_error & 0xff);
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printk("hd%c: %s: error=0x%02x { ", devc, msg, hd_error & 0xff);
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if (hd_error & BBD_ERR) printk("BadSector ");
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if (hd_error & BBD_ERR) printk("BadSector ");
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if (hd_error & ECC_ERR) printk("UncorrectableError ");
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if (hd_error & ECC_ERR) printk("UncorrectableError ");
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if (hd_error & ID_ERR) printk("SectorIdNotFound ");
|
if (hd_error & ID_ERR) printk("SectorIdNotFound ");
|
if (hd_error & ABRT_ERR) printk("DriveStatusError ");
|
if (hd_error & ABRT_ERR) printk("DriveStatusError ");
|
if (hd_error & TRK0_ERR) printk("TrackZeroNotFound ");
|
if (hd_error & TRK0_ERR) printk("TrackZeroNotFound ");
|
if (hd_error & MARK_ERR) printk("AddrMarkNotFound ");
|
if (hd_error & MARK_ERR) printk("AddrMarkNotFound ");
|
printk("}");
|
printk("}");
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if (hd_error & (BBD_ERR|ECC_ERR|ID_ERR|MARK_ERR)) {
|
if (hd_error & (BBD_ERR|ECC_ERR|ID_ERR|MARK_ERR)) {
|
printk(", CHS=%d/%d/%d", (inb(HD_HCYL)<<8) + inb(HD_LCYL),
|
printk(", CHS=%d/%d/%d", (inb(HD_HCYL)<<8) + inb(HD_LCYL),
|
inb(HD_CURRENT) & 0xf, inb(HD_SECTOR));
|
inb(HD_CURRENT) & 0xf, inb(HD_SECTOR));
|
if (CURRENT)
|
if (CURRENT)
|
printk(", sector=%ld", CURRENT->sector);
|
printk(", sector=%ld", CURRENT->sector);
|
}
|
}
|
printk("\n");
|
printk("\n");
|
}
|
}
|
restore_flags (flags);
|
restore_flags (flags);
|
}
|
}
|
|
|
void check_status(void)
|
void check_status(void)
|
{
|
{
|
int i = inb_p(HD_STATUS);
|
int i = inb_p(HD_STATUS);
|
|
|
if (!OK_STATUS(i)) {
|
if (!OK_STATUS(i)) {
|
dump_status("check_status", i);
|
dump_status("check_status", i);
|
bad_rw_intr();
|
bad_rw_intr();
|
}
|
}
|
}
|
}
|
|
|
static int controller_busy(void)
|
static int controller_busy(void)
|
{
|
{
|
int retries = 100000;
|
int retries = 100000;
|
unsigned char status;
|
unsigned char status;
|
|
|
do {
|
do {
|
status = inb_p(HD_STATUS);
|
status = inb_p(HD_STATUS);
|
} while ((status & BUSY_STAT) && --retries);
|
} while ((status & BUSY_STAT) && --retries);
|
return status;
|
return status;
|
}
|
}
|
|
|
static int status_ok(void)
|
static int status_ok(void)
|
{
|
{
|
unsigned char status = inb_p(HD_STATUS);
|
unsigned char status = inb_p(HD_STATUS);
|
|
|
if (status & BUSY_STAT)
|
if (status & BUSY_STAT)
|
return 1; /* Ancient, but does it make sense??? */
|
return 1; /* Ancient, but does it make sense??? */
|
if (status & WRERR_STAT)
|
if (status & WRERR_STAT)
|
return 0;
|
return 0;
|
if (!(status & READY_STAT))
|
if (!(status & READY_STAT))
|
return 0;
|
return 0;
|
if (!(status & SEEK_STAT))
|
if (!(status & SEEK_STAT))
|
return 0;
|
return 0;
|
return 1;
|
return 1;
|
}
|
}
|
|
|
static int controller_ready(unsigned int drive, unsigned int head)
|
static int controller_ready(unsigned int drive, unsigned int head)
|
{
|
{
|
int retry = 100;
|
int retry = 100;
|
|
|
do {
|
do {
|
if (controller_busy() & BUSY_STAT)
|
if (controller_busy() & BUSY_STAT)
|
return 0;
|
return 0;
|
outb_p(0xA0 | (drive<<4) | head, HD_CURRENT);
|
outb_p(0xA0 | (drive<<4) | head, HD_CURRENT);
|
if (status_ok())
|
if (status_ok())
|
return 1;
|
return 1;
|
} while (--retry);
|
} while (--retry);
|
return 0;
|
return 0;
|
}
|
}
|
|
|
static void hd_out(unsigned int drive,unsigned int nsect,unsigned int sect,
|
static void hd_out(unsigned int drive,unsigned int nsect,unsigned int sect,
|
unsigned int head,unsigned int cyl,unsigned int cmd,
|
unsigned int head,unsigned int cyl,unsigned int cmd,
|
void (*intr_addr)(void))
|
void (*intr_addr)(void))
|
{
|
{
|
unsigned short port;
|
unsigned short port;
|
|
|
#if (HD_DELAY > 0)
|
#if (HD_DELAY > 0)
|
while (read_timer() - last_req < HD_DELAY)
|
while (read_timer() - last_req < HD_DELAY)
|
/* nothing */;
|
/* nothing */;
|
#endif
|
#endif
|
if (reset)
|
if (reset)
|
return;
|
return;
|
if (!controller_ready(drive, head)) {
|
if (!controller_ready(drive, head)) {
|
reset = 1;
|
reset = 1;
|
return;
|
return;
|
}
|
}
|
SET_INTR(intr_addr);
|
SET_INTR(intr_addr);
|
outb_p(hd_info[drive].ctl,HD_CMD);
|
outb_p(hd_info[drive].ctl,HD_CMD);
|
port=HD_DATA;
|
port=HD_DATA;
|
outb_p(hd_info[drive].wpcom>>2,++port);
|
outb_p(hd_info[drive].wpcom>>2,++port);
|
outb_p(nsect,++port);
|
outb_p(nsect,++port);
|
outb_p(sect,++port);
|
outb_p(sect,++port);
|
outb_p(cyl,++port);
|
outb_p(cyl,++port);
|
outb_p(cyl>>8,++port);
|
outb_p(cyl>>8,++port);
|
outb_p(0xA0|(drive<<4)|head,++port);
|
outb_p(0xA0|(drive<<4)|head,++port);
|
outb_p(cmd,++port);
|
outb_p(cmd,++port);
|
}
|
}
|
|
|
static void hd_request (void);
|
static void hd_request (void);
|
static unsigned int identified [MAX_HD]; /* 1 = drive ID already displayed */
|
static unsigned int identified [MAX_HD]; /* 1 = drive ID already displayed */
|
static unsigned int unmask_intr [MAX_HD]; /* 1 = unmask IRQs during I/O */
|
static unsigned int unmask_intr [MAX_HD]; /* 1 = unmask IRQs during I/O */
|
static unsigned int max_mult [MAX_HD]; /* max sectors for MultMode */
|
static unsigned int max_mult [MAX_HD]; /* max sectors for MultMode */
|
static unsigned int mult_req [MAX_HD]; /* requested MultMode count */
|
static unsigned int mult_req [MAX_HD]; /* requested MultMode count */
|
static unsigned int mult_count [MAX_HD]; /* currently enabled MultMode count */
|
static unsigned int mult_count [MAX_HD]; /* currently enabled MultMode count */
|
static struct request WCURRENT;
|
static struct request WCURRENT;
|
|
|
static void fixstring (unsigned char *s, int bytecount)
|
static void fixstring (unsigned char *s, int bytecount)
|
{
|
{
|
unsigned char *p, *end = &s[bytecount &= ~1]; /* bytecount must be even */
|
unsigned char *p, *end = &s[bytecount &= ~1]; /* bytecount must be even */
|
|
|
/* convert from big-endian to little-endian */
|
/* convert from big-endian to little-endian */
|
for (p = end ; p != s;) {
|
for (p = end ; p != s;) {
|
unsigned short *pp = (unsigned short *) (p -= 2);
|
unsigned short *pp = (unsigned short *) (p -= 2);
|
*pp = (*pp >> 8) | (*pp << 8);
|
*pp = (*pp >> 8) | (*pp << 8);
|
}
|
}
|
|
|
/* strip leading blanks */
|
/* strip leading blanks */
|
while (s != end && *s == ' ')
|
while (s != end && *s == ' ')
|
++s;
|
++s;
|
|
|
/* compress internal blanks and strip trailing blanks */
|
/* compress internal blanks and strip trailing blanks */
|
while (s != end && *s) {
|
while (s != end && *s) {
|
if (*s++ != ' ' || (s != end && *s && *s != ' '))
|
if (*s++ != ' ' || (s != end && *s && *s != ' '))
|
*p++ = *(s-1);
|
*p++ = *(s-1);
|
}
|
}
|
|
|
/* wipe out trailing garbage */
|
/* wipe out trailing garbage */
|
while (p != end)
|
while (p != end)
|
*p++ = '\0';
|
*p++ = '\0';
|
}
|
}
|
|
|
static void identify_intr(void)
|
static void identify_intr(void)
|
{
|
{
|
unsigned int dev = DEVICE_NR(CURRENT->rq_dev);
|
unsigned int dev = DEVICE_NR(CURRENT->rq_dev);
|
unsigned short stat = inb_p(HD_STATUS);
|
unsigned short stat = inb_p(HD_STATUS);
|
struct hd_driveid *id = hd_ident_info[dev];
|
struct hd_driveid *id = hd_ident_info[dev];
|
|
|
if (unmask_intr[dev])
|
if (unmask_intr[dev])
|
sti();
|
sti();
|
if (stat & (BUSY_STAT|ERR_STAT)) {
|
if (stat & (BUSY_STAT|ERR_STAT)) {
|
printk (" hd%c: non-IDE device, %dMB, CHS=%d/%d/%d\n", dev+'a',
|
printk (" hd%c: non-IDE device, %dMB, CHS=%d/%d/%d\n", dev+'a',
|
hd_info[dev].cyl*hd_info[dev].head*hd_info[dev].sect / 2048,
|
hd_info[dev].cyl*hd_info[dev].head*hd_info[dev].sect / 2048,
|
hd_info[dev].cyl, hd_info[dev].head, hd_info[dev].sect);
|
hd_info[dev].cyl, hd_info[dev].head, hd_info[dev].sect);
|
if (id != NULL) {
|
if (id != NULL) {
|
hd_ident_info[dev] = NULL;
|
hd_ident_info[dev] = NULL;
|
kfree_s (id, 512);
|
kfree_s (id, 512);
|
}
|
}
|
} else {
|
} else {
|
insw(HD_DATA, id, 256); /* get ID info */
|
insw(HD_DATA, id, 256); /* get ID info */
|
max_mult[dev] = id->max_multsect;
|
max_mult[dev] = id->max_multsect;
|
if ((id->field_valid&1) && id->cur_cyls && id->cur_heads && (id->cur_heads <= 16) && id->cur_sectors) {
|
if ((id->field_valid&1) && id->cur_cyls && id->cur_heads && (id->cur_heads <= 16) && id->cur_sectors) {
|
/*
|
/*
|
* Extract the physical drive geometry for our use.
|
* Extract the physical drive geometry for our use.
|
* Note that we purposely do *not* update the bios_info.
|
* Note that we purposely do *not* update the bios_info.
|
* This way, programs that use it (like fdisk) will
|
* This way, programs that use it (like fdisk) will
|
* still have the same logical view as the BIOS does,
|
* still have the same logical view as the BIOS does,
|
* which keeps the partition table from being screwed.
|
* which keeps the partition table from being screwed.
|
*/
|
*/
|
hd_info[dev].cyl = id->cur_cyls;
|
hd_info[dev].cyl = id->cur_cyls;
|
hd_info[dev].head = id->cur_heads;
|
hd_info[dev].head = id->cur_heads;
|
hd_info[dev].sect = id->cur_sectors;
|
hd_info[dev].sect = id->cur_sectors;
|
}
|
}
|
fixstring (id->serial_no, sizeof(id->serial_no));
|
fixstring (id->serial_no, sizeof(id->serial_no));
|
fixstring (id->fw_rev, sizeof(id->fw_rev));
|
fixstring (id->fw_rev, sizeof(id->fw_rev));
|
fixstring (id->model, sizeof(id->model));
|
fixstring (id->model, sizeof(id->model));
|
printk (" hd%c: %.40s, %dMB w/%dKB Cache, CHS=%d/%d/%d, MaxMult=%d\n",
|
printk (" hd%c: %.40s, %dMB w/%dKB Cache, CHS=%d/%d/%d, MaxMult=%d\n",
|
dev+'a', id->model, id->cyls*id->heads*id->sectors/2048,
|
dev+'a', id->model, id->cyls*id->heads*id->sectors/2048,
|
id->buf_size/2, bios_info[dev].cyl, bios_info[dev].head,
|
id->buf_size/2, bios_info[dev].cyl, bios_info[dev].head,
|
bios_info[dev].sect, id->max_multsect);
|
bios_info[dev].sect, id->max_multsect);
|
/*
|
/*
|
* Early model Quantum drives go weird at this point,
|
* Early model Quantum drives go weird at this point,
|
* but doing a recalibrate seems to "fix" them.
|
* but doing a recalibrate seems to "fix" them.
|
* (Doing a full reset confuses some other model Quantums)
|
* (Doing a full reset confuses some other model Quantums)
|
*/
|
*/
|
if (!strncmp(id->model, "QUANTUM", 7))
|
if (!strncmp(id->model, "QUANTUM", 7))
|
special_op[dev] = recalibrate[dev] = 1;
|
special_op[dev] = recalibrate[dev] = 1;
|
}
|
}
|
#if (HD_DELAY > 0)
|
#if (HD_DELAY > 0)
|
last_req = read_timer();
|
last_req = read_timer();
|
#endif
|
#endif
|
hd_request();
|
hd_request();
|
return;
|
return;
|
}
|
}
|
|
|
static void set_multmode_intr(void)
|
static void set_multmode_intr(void)
|
{
|
{
|
unsigned int dev = DEVICE_NR(CURRENT->rq_dev), stat = inb_p(HD_STATUS);
|
unsigned int dev = DEVICE_NR(CURRENT->rq_dev), stat = inb_p(HD_STATUS);
|
|
|
if (unmask_intr[dev])
|
if (unmask_intr[dev])
|
sti();
|
sti();
|
if (stat & (BUSY_STAT|ERR_STAT)) {
|
if (stat & (BUSY_STAT|ERR_STAT)) {
|
mult_req[dev] = mult_count[dev] = 0;
|
mult_req[dev] = mult_count[dev] = 0;
|
dump_status("set multmode failed", stat);
|
dump_status("set multmode failed", stat);
|
} else {
|
} else {
|
if ((mult_count[dev] = mult_req[dev]))
|
if ((mult_count[dev] = mult_req[dev]))
|
printk (" hd%c: enabled %d-sector multiple mode\n",
|
printk (" hd%c: enabled %d-sector multiple mode\n",
|
dev+'a', mult_count[dev]);
|
dev+'a', mult_count[dev]);
|
else
|
else
|
printk (" hd%c: disabled multiple mode\n", dev+'a');
|
printk (" hd%c: disabled multiple mode\n", dev+'a');
|
}
|
}
|
#if (HD_DELAY > 0)
|
#if (HD_DELAY > 0)
|
last_req = read_timer();
|
last_req = read_timer();
|
#endif
|
#endif
|
hd_request();
|
hd_request();
|
return;
|
return;
|
}
|
}
|
|
|
static int drive_busy(void)
|
static int drive_busy(void)
|
{
|
{
|
unsigned int i;
|
unsigned int i;
|
unsigned char c;
|
unsigned char c;
|
|
|
for (i = 0; i < 500000 ; i++) {
|
for (i = 0; i < 500000 ; i++) {
|
c = inb_p(HD_STATUS);
|
c = inb_p(HD_STATUS);
|
if ((c & (BUSY_STAT | READY_STAT | SEEK_STAT)) == STAT_OK)
|
if ((c & (BUSY_STAT | READY_STAT | SEEK_STAT)) == STAT_OK)
|
return 0;
|
return 0;
|
}
|
}
|
dump_status("reset timed out", c);
|
dump_status("reset timed out", c);
|
return 1;
|
return 1;
|
}
|
}
|
|
|
static void reset_controller(void)
|
static void reset_controller(void)
|
{
|
{
|
int i;
|
int i;
|
|
|
outb_p(4,HD_CMD);
|
outb_p(4,HD_CMD);
|
for(i = 0; i < 1000; i++) barrier();
|
for(i = 0; i < 1000; i++) barrier();
|
outb_p(hd_info[0].ctl & 0x0f,HD_CMD);
|
outb_p(hd_info[0].ctl & 0x0f,HD_CMD);
|
for(i = 0; i < 1000; i++) barrier();
|
for(i = 0; i < 1000; i++) barrier();
|
if (drive_busy())
|
if (drive_busy())
|
printk("hd: controller still busy\n");
|
printk("hd: controller still busy\n");
|
else if ((hd_error = inb(HD_ERROR)) != 1)
|
else if ((hd_error = inb(HD_ERROR)) != 1)
|
printk("hd: controller reset failed: %02x\n",hd_error);
|
printk("hd: controller reset failed: %02x\n",hd_error);
|
}
|
}
|
|
|
static void reset_hd(void)
|
static void reset_hd(void)
|
{
|
{
|
static int i;
|
static int i;
|
|
|
repeat:
|
repeat:
|
if (reset) {
|
if (reset) {
|
reset = 0;
|
reset = 0;
|
i = -1;
|
i = -1;
|
reset_controller();
|
reset_controller();
|
} else {
|
} else {
|
check_status();
|
check_status();
|
if (reset)
|
if (reset)
|
goto repeat;
|
goto repeat;
|
}
|
}
|
if (++i < NR_HD) {
|
if (++i < NR_HD) {
|
special_op[i] = recalibrate[i] = 1;
|
special_op[i] = recalibrate[i] = 1;
|
if (unmask_intr[i]) {
|
if (unmask_intr[i]) {
|
unmask_intr[i] = DEFAULT_UNMASK_INTR;
|
unmask_intr[i] = DEFAULT_UNMASK_INTR;
|
printk("hd%c: reset irq-unmasking to %d\n",i+'a',
|
printk("hd%c: reset irq-unmasking to %d\n",i+'a',
|
DEFAULT_UNMASK_INTR);
|
DEFAULT_UNMASK_INTR);
|
}
|
}
|
if (mult_req[i] || mult_count[i]) {
|
if (mult_req[i] || mult_count[i]) {
|
mult_count[i] = 0;
|
mult_count[i] = 0;
|
mult_req[i] = DEFAULT_MULT_COUNT;
|
mult_req[i] = DEFAULT_MULT_COUNT;
|
printk("hd%c: reset multiple mode to %d\n",i+'a',
|
printk("hd%c: reset multiple mode to %d\n",i+'a',
|
DEFAULT_MULT_COUNT);
|
DEFAULT_MULT_COUNT);
|
}
|
}
|
hd_out(i,hd_info[i].sect,hd_info[i].sect,hd_info[i].head-1,
|
hd_out(i,hd_info[i].sect,hd_info[i].sect,hd_info[i].head-1,
|
hd_info[i].cyl,WIN_SPECIFY,&reset_hd);
|
hd_info[i].cyl,WIN_SPECIFY,&reset_hd);
|
if (reset)
|
if (reset)
|
goto repeat;
|
goto repeat;
|
} else
|
} else
|
hd_request();
|
hd_request();
|
}
|
}
|
|
|
/*
|
/*
|
* Ok, don't know what to do with the unexpected interrupts: on some machines
|
* Ok, don't know what to do with the unexpected interrupts: on some machines
|
* doing a reset and a retry seems to result in an eternal loop. Right now I
|
* doing a reset and a retry seems to result in an eternal loop. Right now I
|
* ignore it, and just set the timeout.
|
* ignore it, and just set the timeout.
|
*
|
*
|
* On laptops (and "green" PCs), an unexpected interrupt occurs whenever the
|
* On laptops (and "green" PCs), an unexpected interrupt occurs whenever the
|
* drive enters "idle", "standby", or "sleep" mode, so if the status looks
|
* drive enters "idle", "standby", or "sleep" mode, so if the status looks
|
* "good", we just ignore the interrupt completely.
|
* "good", we just ignore the interrupt completely.
|
*/
|
*/
|
void unexpected_hd_interrupt(void)
|
void unexpected_hd_interrupt(void)
|
{
|
{
|
unsigned int stat = inb_p(HD_STATUS);
|
unsigned int stat = inb_p(HD_STATUS);
|
|
|
if (stat & (BUSY_STAT|DRQ_STAT|ECC_STAT|ERR_STAT)) {
|
if (stat & (BUSY_STAT|DRQ_STAT|ECC_STAT|ERR_STAT)) {
|
dump_status ("unexpected interrupt", stat);
|
dump_status ("unexpected interrupt", stat);
|
SET_TIMER;
|
SET_TIMER;
|
}
|
}
|
}
|
}
|
|
|
/*
|
/*
|
* bad_rw_intr() now tries to be a bit smarter and does things
|
* bad_rw_intr() now tries to be a bit smarter and does things
|
* according to the error returned by the controller.
|
* according to the error returned by the controller.
|
* -Mika Liljeberg (liljeber@cs.Helsinki.FI)
|
* -Mika Liljeberg (liljeber@cs.Helsinki.FI)
|
*/
|
*/
|
static void bad_rw_intr(void)
|
static void bad_rw_intr(void)
|
{
|
{
|
int dev;
|
int dev;
|
|
|
if (!CURRENT)
|
if (!CURRENT)
|
return;
|
return;
|
dev = DEVICE_NR(CURRENT->rq_dev);
|
dev = DEVICE_NR(CURRENT->rq_dev);
|
if (++CURRENT->errors >= MAX_ERRORS || (hd_error & BBD_ERR)) {
|
if (++CURRENT->errors >= MAX_ERRORS || (hd_error & BBD_ERR)) {
|
end_request(0);
|
end_request(0);
|
special_op[dev] = recalibrate[dev] = 1;
|
special_op[dev] = recalibrate[dev] = 1;
|
} else if (CURRENT->errors % RESET_FREQ == 0)
|
} else if (CURRENT->errors % RESET_FREQ == 0)
|
reset = 1;
|
reset = 1;
|
else if ((hd_error & TRK0_ERR) || CURRENT->errors % RECAL_FREQ == 0)
|
else if ((hd_error & TRK0_ERR) || CURRENT->errors % RECAL_FREQ == 0)
|
special_op[dev] = recalibrate[dev] = 1;
|
special_op[dev] = recalibrate[dev] = 1;
|
/* Otherwise just retry */
|
/* Otherwise just retry */
|
}
|
}
|
|
|
static inline int wait_DRQ(void)
|
static inline int wait_DRQ(void)
|
{
|
{
|
int retries = 100000, stat;
|
int retries = 100000, stat;
|
|
|
while (--retries > 0)
|
while (--retries > 0)
|
if ((stat = inb_p(HD_STATUS)) & DRQ_STAT)
|
if ((stat = inb_p(HD_STATUS)) & DRQ_STAT)
|
return 0;
|
return 0;
|
dump_status("wait_DRQ", stat);
|
dump_status("wait_DRQ", stat);
|
return -1;
|
return -1;
|
}
|
}
|
|
|
static void read_intr(void)
|
static void read_intr(void)
|
{
|
{
|
unsigned int dev = DEVICE_NR(CURRENT->rq_dev);
|
unsigned int dev = DEVICE_NR(CURRENT->rq_dev);
|
int i, retries = 100000, msect = mult_count[dev], nsect;
|
int i, retries = 100000, msect = mult_count[dev], nsect;
|
|
|
if (unmask_intr[dev])
|
if (unmask_intr[dev])
|
sti(); /* permit other IRQs during xfer */
|
sti(); /* permit other IRQs during xfer */
|
do {
|
do {
|
i = (unsigned) inb_p(HD_STATUS);
|
i = (unsigned) inb_p(HD_STATUS);
|
if (i & BUSY_STAT)
|
if (i & BUSY_STAT)
|
continue;
|
continue;
|
if (!OK_STATUS(i))
|
if (!OK_STATUS(i))
|
break;
|
break;
|
if (i & DRQ_STAT)
|
if (i & DRQ_STAT)
|
goto ok_to_read;
|
goto ok_to_read;
|
} while (--retries > 0);
|
} while (--retries > 0);
|
dump_status("read_intr", i);
|
dump_status("read_intr", i);
|
bad_rw_intr();
|
bad_rw_intr();
|
hd_request();
|
hd_request();
|
return;
|
return;
|
ok_to_read:
|
ok_to_read:
|
if (msect) {
|
if (msect) {
|
if ((nsect = CURRENT->current_nr_sectors) > msect)
|
if ((nsect = CURRENT->current_nr_sectors) > msect)
|
nsect = msect;
|
nsect = msect;
|
msect -= nsect;
|
msect -= nsect;
|
} else
|
} else
|
nsect = 1;
|
nsect = 1;
|
insw(HD_DATA,CURRENT->buffer,nsect<<8);
|
insw(HD_DATA,CURRENT->buffer,nsect<<8);
|
CURRENT->sector += nsect;
|
CURRENT->sector += nsect;
|
CURRENT->buffer += nsect<<9;
|
CURRENT->buffer += nsect<<9;
|
CURRENT->errors = 0;
|
CURRENT->errors = 0;
|
i = (CURRENT->nr_sectors -= nsect);
|
i = (CURRENT->nr_sectors -= nsect);
|
|
|
#ifdef DEBUG
|
#ifdef DEBUG
|
printk("hd%c: read: sectors(%ld-%ld), remaining=%ld, buffer=0x%08lx\n",
|
printk("hd%c: read: sectors(%ld-%ld), remaining=%ld, buffer=0x%08lx\n",
|
dev+'a', CURRENT->sector, CURRENT->sector+nsect,
|
dev+'a', CURRENT->sector, CURRENT->sector+nsect,
|
CURRENT->nr_sectors, (unsigned long) CURRENT->buffer+(nsect<<9));
|
CURRENT->nr_sectors, (unsigned long) CURRENT->buffer+(nsect<<9));
|
#endif
|
#endif
|
if ((CURRENT->current_nr_sectors -= nsect) <= 0)
|
if ((CURRENT->current_nr_sectors -= nsect) <= 0)
|
end_request(1);
|
end_request(1);
|
if (i > 0) {
|
if (i > 0) {
|
if (msect)
|
if (msect)
|
goto ok_to_read;
|
goto ok_to_read;
|
SET_INTR(&read_intr);
|
SET_INTR(&read_intr);
|
return;
|
return;
|
}
|
}
|
(void) inb_p(HD_STATUS);
|
(void) inb_p(HD_STATUS);
|
#if (HD_DELAY > 0)
|
#if (HD_DELAY > 0)
|
last_req = read_timer();
|
last_req = read_timer();
|
#endif
|
#endif
|
if (CURRENT)
|
if (CURRENT)
|
hd_request();
|
hd_request();
|
return;
|
return;
|
}
|
}
|
|
|
static inline void multwrite (unsigned int dev)
|
static inline void multwrite (unsigned int dev)
|
{
|
{
|
unsigned int mcount = mult_count[dev];
|
unsigned int mcount = mult_count[dev];
|
|
|
while (mcount--) {
|
while (mcount--) {
|
outsw(HD_DATA,WCURRENT.buffer,256);
|
outsw(HD_DATA,WCURRENT.buffer,256);
|
if (!--WCURRENT.nr_sectors)
|
if (!--WCURRENT.nr_sectors)
|
return;
|
return;
|
WCURRENT.buffer += 512;
|
WCURRENT.buffer += 512;
|
if (!--WCURRENT.current_nr_sectors) {
|
if (!--WCURRENT.current_nr_sectors) {
|
WCURRENT.bh = WCURRENT.bh->b_reqnext;
|
WCURRENT.bh = WCURRENT.bh->b_reqnext;
|
if (WCURRENT.bh == NULL)
|
if (WCURRENT.bh == NULL)
|
panic("buffer list corrupted\n");
|
panic("buffer list corrupted\n");
|
WCURRENT.current_nr_sectors = WCURRENT.bh->b_size>>9;
|
WCURRENT.current_nr_sectors = WCURRENT.bh->b_size>>9;
|
WCURRENT.buffer = WCURRENT.bh->b_data;
|
WCURRENT.buffer = WCURRENT.bh->b_data;
|
}
|
}
|
}
|
}
|
}
|
}
|
|
|
static void multwrite_intr(void)
|
static void multwrite_intr(void)
|
{
|
{
|
int i;
|
int i;
|
unsigned int dev = DEVICE_NR(WCURRENT.rq_dev);
|
unsigned int dev = DEVICE_NR(WCURRENT.rq_dev);
|
|
|
if (unmask_intr[dev])
|
if (unmask_intr[dev])
|
sti();
|
sti();
|
if (OK_STATUS(i=inb_p(HD_STATUS))) {
|
if (OK_STATUS(i=inb_p(HD_STATUS))) {
|
if (i & DRQ_STAT) {
|
if (i & DRQ_STAT) {
|
if (WCURRENT.nr_sectors) {
|
if (WCURRENT.nr_sectors) {
|
multwrite(dev);
|
multwrite(dev);
|
SET_INTR(&multwrite_intr);
|
SET_INTR(&multwrite_intr);
|
return;
|
return;
|
}
|
}
|
} else {
|
} else {
|
if (!WCURRENT.nr_sectors) { /* all done? */
|
if (!WCURRENT.nr_sectors) { /* all done? */
|
for (i = CURRENT->nr_sectors; i > 0;){
|
for (i = CURRENT->nr_sectors; i > 0;){
|
i -= CURRENT->current_nr_sectors;
|
i -= CURRENT->current_nr_sectors;
|
end_request(1);
|
end_request(1);
|
}
|
}
|
#if (HD_DELAY > 0)
|
#if (HD_DELAY > 0)
|
last_req = read_timer();
|
last_req = read_timer();
|
#endif
|
#endif
|
if (CURRENT)
|
if (CURRENT)
|
hd_request();
|
hd_request();
|
return;
|
return;
|
}
|
}
|
}
|
}
|
}
|
}
|
dump_status("multwrite_intr", i);
|
dump_status("multwrite_intr", i);
|
bad_rw_intr();
|
bad_rw_intr();
|
hd_request();
|
hd_request();
|
}
|
}
|
|
|
static void write_intr(void)
|
static void write_intr(void)
|
{
|
{
|
int i;
|
int i;
|
int retries = 100000;
|
int retries = 100000;
|
|
|
if (unmask_intr[DEVICE_NR(WCURRENT.rq_dev)])
|
if (unmask_intr[DEVICE_NR(WCURRENT.rq_dev)])
|
sti();
|
sti();
|
do {
|
do {
|
i = (unsigned) inb_p(HD_STATUS);
|
i = (unsigned) inb_p(HD_STATUS);
|
if (i & BUSY_STAT)
|
if (i & BUSY_STAT)
|
continue;
|
continue;
|
if (!OK_STATUS(i))
|
if (!OK_STATUS(i))
|
break;
|
break;
|
if ((CURRENT->nr_sectors <= 1) || (i & DRQ_STAT))
|
if ((CURRENT->nr_sectors <= 1) || (i & DRQ_STAT))
|
goto ok_to_write;
|
goto ok_to_write;
|
} while (--retries > 0);
|
} while (--retries > 0);
|
dump_status("write_intr", i);
|
dump_status("write_intr", i);
|
bad_rw_intr();
|
bad_rw_intr();
|
hd_request();
|
hd_request();
|
return;
|
return;
|
ok_to_write:
|
ok_to_write:
|
CURRENT->sector++;
|
CURRENT->sector++;
|
i = --CURRENT->nr_sectors;
|
i = --CURRENT->nr_sectors;
|
--CURRENT->current_nr_sectors;
|
--CURRENT->current_nr_sectors;
|
CURRENT->buffer += 512;
|
CURRENT->buffer += 512;
|
if (!i || (CURRENT->bh && !SUBSECTOR(i)))
|
if (!i || (CURRENT->bh && !SUBSECTOR(i)))
|
end_request(1);
|
end_request(1);
|
if (i > 0) {
|
if (i > 0) {
|
SET_INTR(&write_intr);
|
SET_INTR(&write_intr);
|
outsw(HD_DATA,CURRENT->buffer,256);
|
outsw(HD_DATA,CURRENT->buffer,256);
|
sti();
|
sti();
|
} else {
|
} else {
|
#if (HD_DELAY > 0)
|
#if (HD_DELAY > 0)
|
last_req = read_timer();
|
last_req = read_timer();
|
#endif
|
#endif
|
hd_request();
|
hd_request();
|
}
|
}
|
return;
|
return;
|
}
|
}
|
|
|
static void recal_intr(void)
|
static void recal_intr(void)
|
{
|
{
|
check_status();
|
check_status();
|
#if (HD_DELAY > 0)
|
#if (HD_DELAY > 0)
|
last_req = read_timer();
|
last_req = read_timer();
|
#endif
|
#endif
|
hd_request();
|
hd_request();
|
}
|
}
|
|
|
/*
|
/*
|
* This is another of the error-routines I don't know what to do with. The
|
* This is another of the error-routines I don't know what to do with. The
|
* best idea seems to just set reset, and start all over again.
|
* best idea seems to just set reset, and start all over again.
|
*/
|
*/
|
static void hd_times_out(void)
|
static void hd_times_out(void)
|
{
|
{
|
unsigned int dev;
|
unsigned int dev;
|
|
|
DEVICE_INTR = NULL;
|
DEVICE_INTR = NULL;
|
if (!CURRENT)
|
if (!CURRENT)
|
return;
|
return;
|
disable_irq(HD_IRQ);
|
disable_irq(HD_IRQ);
|
sti();
|
sti();
|
reset = 1;
|
reset = 1;
|
dev = DEVICE_NR(CURRENT->rq_dev);
|
dev = DEVICE_NR(CURRENT->rq_dev);
|
printk("hd%c: timeout\n", dev+'a');
|
printk("hd%c: timeout\n", dev+'a');
|
if (++CURRENT->errors >= MAX_ERRORS) {
|
if (++CURRENT->errors >= MAX_ERRORS) {
|
#ifdef DEBUG
|
#ifdef DEBUG
|
printk("hd%c: too many errors\n", dev+'a');
|
printk("hd%c: too many errors\n", dev+'a');
|
#endif
|
#endif
|
end_request(0);
|
end_request(0);
|
}
|
}
|
cli();
|
cli();
|
hd_request();
|
hd_request();
|
enable_irq(HD_IRQ);
|
enable_irq(HD_IRQ);
|
}
|
}
|
|
|
int do_special_op (unsigned int dev)
|
int do_special_op (unsigned int dev)
|
{
|
{
|
if (recalibrate[dev]) {
|
if (recalibrate[dev]) {
|
recalibrate[dev] = 0;
|
recalibrate[dev] = 0;
|
hd_out(dev,hd_info[dev].sect,0,0,0,WIN_RESTORE,&recal_intr);
|
hd_out(dev,hd_info[dev].sect,0,0,0,WIN_RESTORE,&recal_intr);
|
return reset;
|
return reset;
|
}
|
}
|
if (!identified[dev]) {
|
if (!identified[dev]) {
|
identified[dev] = 1;
|
identified[dev] = 1;
|
unmask_intr[dev] = DEFAULT_UNMASK_INTR;
|
unmask_intr[dev] = DEFAULT_UNMASK_INTR;
|
mult_req[dev] = DEFAULT_MULT_COUNT;
|
mult_req[dev] = DEFAULT_MULT_COUNT;
|
hd_out(dev,0,0,0,0,WIN_IDENTIFY,&identify_intr);
|
hd_out(dev,0,0,0,0,WIN_IDENTIFY,&identify_intr);
|
return reset;
|
return reset;
|
}
|
}
|
if (mult_req[dev] != mult_count[dev]) {
|
if (mult_req[dev] != mult_count[dev]) {
|
hd_out(dev,mult_req[dev],0,0,0,WIN_SETMULT,&set_multmode_intr);
|
hd_out(dev,mult_req[dev],0,0,0,WIN_SETMULT,&set_multmode_intr);
|
return reset;
|
return reset;
|
}
|
}
|
if (hd_info[dev].head > 16) {
|
if (hd_info[dev].head > 16) {
|
printk ("hd%c: cannot handle device with more than 16 heads - giving up\n", dev+'a');
|
printk ("hd%c: cannot handle device with more than 16 heads - giving up\n", dev+'a');
|
end_request(0);
|
end_request(0);
|
}
|
}
|
special_op[dev] = 0;
|
special_op[dev] = 0;
|
return 1;
|
return 1;
|
}
|
}
|
|
|
/*
|
/*
|
* The driver enables interrupts as much as possible. In order to do this,
|
* The driver enables interrupts as much as possible. In order to do this,
|
* (a) the device-interrupt is disabled before entering hd_request(),
|
* (a) the device-interrupt is disabled before entering hd_request(),
|
* and (b) the timeout-interrupt is disabled before the sti().
|
* and (b) the timeout-interrupt is disabled before the sti().
|
*
|
*
|
* Interrupts are still masked (by default) whenever we are exchanging
|
* Interrupts are still masked (by default) whenever we are exchanging
|
* data/cmds with a drive, because some drives seem to have very poor
|
* data/cmds with a drive, because some drives seem to have very poor
|
* tolerance for latency during I/O. For devices which don't suffer from
|
* tolerance for latency during I/O. For devices which don't suffer from
|
* that problem (most don't), the unmask_intr[] flag can be set to unmask
|
* that problem (most don't), the unmask_intr[] flag can be set to unmask
|
* other interrupts during data/cmd transfers (by defining DEFAULT_UNMASK_INTR
|
* other interrupts during data/cmd transfers (by defining DEFAULT_UNMASK_INTR
|
* to 1, or by using "hdparm -u1 /dev/hd?" from the shell).
|
* to 1, or by using "hdparm -u1 /dev/hd?" from the shell).
|
*/
|
*/
|
static void hd_request(void)
|
static void hd_request(void)
|
{
|
{
|
unsigned int dev, block, nsect, sec, track, head, cyl;
|
unsigned int dev, block, nsect, sec, track, head, cyl;
|
|
|
if (CURRENT && CURRENT->rq_status == RQ_INACTIVE) return;
|
if (CURRENT && CURRENT->rq_status == RQ_INACTIVE) return;
|
if (DEVICE_INTR)
|
if (DEVICE_INTR)
|
return;
|
return;
|
repeat:
|
repeat:
|
timer_active &= ~(1<<HD_TIMER);
|
timer_active &= ~(1<<HD_TIMER);
|
sti();
|
sti();
|
INIT_REQUEST;
|
INIT_REQUEST;
|
if (reset) {
|
if (reset) {
|
cli();
|
cli();
|
reset_hd();
|
reset_hd();
|
return;
|
return;
|
}
|
}
|
dev = MINOR(CURRENT->rq_dev);
|
dev = MINOR(CURRENT->rq_dev);
|
block = CURRENT->sector;
|
block = CURRENT->sector;
|
nsect = CURRENT->nr_sectors;
|
nsect = CURRENT->nr_sectors;
|
if (dev >= (NR_HD<<6) || block >= hd[dev].nr_sects || ((block+nsect) > hd[dev].nr_sects)) {
|
if (dev >= (NR_HD<<6) || block >= hd[dev].nr_sects || ((block+nsect) > hd[dev].nr_sects)) {
|
#ifdef DEBUG
|
#ifdef DEBUG
|
if (dev >= (NR_HD<<6))
|
if (dev >= (NR_HD<<6))
|
printk("hd: bad minor number: device=%s\n",
|
printk("hd: bad minor number: device=%s\n",
|
kdevname(CURRENT->rq_dev));
|
kdevname(CURRENT->rq_dev));
|
else
|
else
|
printk("hd%c: bad access: block=%d, count=%d\n",
|
printk("hd%c: bad access: block=%d, count=%d\n",
|
(MINOR(CURRENT->rq_dev)>>6)+'a', block, nsect);
|
(MINOR(CURRENT->rq_dev)>>6)+'a', block, nsect);
|
#endif
|
#endif
|
end_request(0);
|
end_request(0);
|
goto repeat;
|
goto repeat;
|
}
|
}
|
block += hd[dev].start_sect;
|
block += hd[dev].start_sect;
|
dev >>= 6;
|
dev >>= 6;
|
if (special_op[dev]) {
|
if (special_op[dev]) {
|
if (do_special_op(dev))
|
if (do_special_op(dev))
|
goto repeat;
|
goto repeat;
|
return;
|
return;
|
}
|
}
|
sec = block % hd_info[dev].sect + 1;
|
sec = block % hd_info[dev].sect + 1;
|
track = block / hd_info[dev].sect;
|
track = block / hd_info[dev].sect;
|
head = track % hd_info[dev].head;
|
head = track % hd_info[dev].head;
|
cyl = track / hd_info[dev].head;
|
cyl = track / hd_info[dev].head;
|
#ifdef DEBUG
|
#ifdef DEBUG
|
printk("hd%c: %sing: CHS=%d/%d/%d, sectors=%d, buffer=0x%08lx\n",
|
printk("hd%c: %sing: CHS=%d/%d/%d, sectors=%d, buffer=0x%08lx\n",
|
dev+'a', (CURRENT->cmd == READ)?"read":"writ",
|
dev+'a', (CURRENT->cmd == READ)?"read":"writ",
|
cyl, head, sec, nsect, (unsigned long) CURRENT->buffer);
|
cyl, head, sec, nsect, (unsigned long) CURRENT->buffer);
|
#endif
|
#endif
|
if (!unmask_intr[dev])
|
if (!unmask_intr[dev])
|
cli();
|
cli();
|
if (CURRENT->cmd == READ) {
|
if (CURRENT->cmd == READ) {
|
unsigned int cmd = mult_count[dev] > 1 ? WIN_MULTREAD : WIN_READ;
|
unsigned int cmd = mult_count[dev] > 1 ? WIN_MULTREAD : WIN_READ;
|
hd_out(dev,nsect,sec,head,cyl,cmd,&read_intr);
|
hd_out(dev,nsect,sec,head,cyl,cmd,&read_intr);
|
if (reset)
|
if (reset)
|
goto repeat;
|
goto repeat;
|
return;
|
return;
|
}
|
}
|
if (CURRENT->cmd == WRITE) {
|
if (CURRENT->cmd == WRITE) {
|
if (mult_count[dev])
|
if (mult_count[dev])
|
hd_out(dev,nsect,sec,head,cyl,WIN_MULTWRITE,&multwrite_intr);
|
hd_out(dev,nsect,sec,head,cyl,WIN_MULTWRITE,&multwrite_intr);
|
else
|
else
|
hd_out(dev,nsect,sec,head,cyl,WIN_WRITE,&write_intr);
|
hd_out(dev,nsect,sec,head,cyl,WIN_WRITE,&write_intr);
|
if (reset)
|
if (reset)
|
goto repeat;
|
goto repeat;
|
if (wait_DRQ()) {
|
if (wait_DRQ()) {
|
bad_rw_intr();
|
bad_rw_intr();
|
goto repeat;
|
goto repeat;
|
}
|
}
|
if (mult_count[dev]) {
|
if (mult_count[dev]) {
|
WCURRENT = *CURRENT;
|
WCURRENT = *CURRENT;
|
multwrite(dev);
|
multwrite(dev);
|
} else
|
} else
|
outsw(HD_DATA,CURRENT->buffer,256);
|
outsw(HD_DATA,CURRENT->buffer,256);
|
return;
|
return;
|
}
|
}
|
panic("unknown hd-command");
|
panic("unknown hd-command");
|
}
|
}
|
|
|
static void do_hd_request (void)
|
static void do_hd_request (void)
|
{
|
{
|
disable_irq(HD_IRQ);
|
disable_irq(HD_IRQ);
|
hd_request();
|
hd_request();
|
enable_irq(HD_IRQ);
|
enable_irq(HD_IRQ);
|
}
|
}
|
|
|
static int hd_ioctl(struct inode * inode, struct file * file,
|
static int hd_ioctl(struct inode * inode, struct file * file,
|
unsigned int cmd, unsigned long arg)
|
unsigned int cmd, unsigned long arg)
|
{
|
{
|
struct hd_geometry *loc = (struct hd_geometry *) arg;
|
struct hd_geometry *loc = (struct hd_geometry *) arg;
|
int dev, err;
|
int dev, err;
|
unsigned long flags;
|
unsigned long flags;
|
|
|
if ((!inode) || !(inode->i_rdev))
|
if ((!inode) || !(inode->i_rdev))
|
return -EINVAL;
|
return -EINVAL;
|
dev = DEVICE_NR(inode->i_rdev);
|
dev = DEVICE_NR(inode->i_rdev);
|
if (dev >= NR_HD)
|
if (dev >= NR_HD)
|
return -EINVAL;
|
return -EINVAL;
|
switch (cmd) {
|
switch (cmd) {
|
case HDIO_GETGEO:
|
case HDIO_GETGEO:
|
if (!loc) return -EINVAL;
|
if (!loc) return -EINVAL;
|
err = verify_area(VERIFY_WRITE, loc, sizeof(*loc));
|
err = verify_area(VERIFY_WRITE, loc, sizeof(*loc));
|
if (err)
|
if (err)
|
return err;
|
return err;
|
put_user(bios_info[dev].head,
|
put_user(bios_info[dev].head,
|
(char *) &loc->heads);
|
(char *) &loc->heads);
|
put_user(bios_info[dev].sect,
|
put_user(bios_info[dev].sect,
|
(char *) &loc->sectors);
|
(char *) &loc->sectors);
|
put_user(bios_info[dev].cyl,
|
put_user(bios_info[dev].cyl,
|
(short *) &loc->cylinders);
|
(short *) &loc->cylinders);
|
put_user(hd[MINOR(inode->i_rdev)].start_sect,
|
put_user(hd[MINOR(inode->i_rdev)].start_sect,
|
(long *) &loc->start);
|
(long *) &loc->start);
|
return 0;
|
return 0;
|
case BLKRASET:
|
case BLKRASET:
|
if(!suser()) return -EACCES;
|
if(!suser()) return -EACCES;
|
if(arg > 0xff) return -EINVAL;
|
if(arg > 0xff) return -EINVAL;
|
read_ahead[MAJOR(inode->i_rdev)] = arg;
|
read_ahead[MAJOR(inode->i_rdev)] = arg;
|
return 0;
|
return 0;
|
case BLKRAGET:
|
case BLKRAGET:
|
if (!arg) return -EINVAL;
|
if (!arg) return -EINVAL;
|
err = verify_area(VERIFY_WRITE, (long *) arg, sizeof(long));
|
err = verify_area(VERIFY_WRITE, (long *) arg, sizeof(long));
|
if (err)
|
if (err)
|
return err;
|
return err;
|
put_user(read_ahead[MAJOR(inode->i_rdev)],(long *) arg);
|
put_user(read_ahead[MAJOR(inode->i_rdev)],(long *) arg);
|
return 0;
|
return 0;
|
case BLKGETSIZE: /* Return device size */
|
case BLKGETSIZE: /* Return device size */
|
if (!arg) return -EINVAL;
|
if (!arg) return -EINVAL;
|
err = verify_area(VERIFY_WRITE, (long *) arg, sizeof(long));
|
err = verify_area(VERIFY_WRITE, (long *) arg, sizeof(long));
|
if (err)
|
if (err)
|
return err;
|
return err;
|
put_user(hd[MINOR(inode->i_rdev)].nr_sects, (long *) arg);
|
put_user(hd[MINOR(inode->i_rdev)].nr_sects, (long *) arg);
|
return 0;
|
return 0;
|
case BLKFLSBUF:
|
case BLKFLSBUF:
|
if(!suser()) return -EACCES;
|
if(!suser()) return -EACCES;
|
fsync_dev(inode->i_rdev);
|
fsync_dev(inode->i_rdev);
|
invalidate_buffers(inode->i_rdev);
|
invalidate_buffers(inode->i_rdev);
|
return 0;
|
return 0;
|
|
|
case BLKRRPART: /* Re-read partition tables */
|
case BLKRRPART: /* Re-read partition tables */
|
return revalidate_hddisk(inode->i_rdev, 1);
|
return revalidate_hddisk(inode->i_rdev, 1);
|
|
|
case HDIO_SET_UNMASKINTR:
|
case HDIO_SET_UNMASKINTR:
|
if (!suser()) return -EACCES;
|
if (!suser()) return -EACCES;
|
if ((arg > 1) || (MINOR(inode->i_rdev) & 0x3F))
|
if ((arg > 1) || (MINOR(inode->i_rdev) & 0x3F))
|
return -EINVAL;
|
return -EINVAL;
|
unmask_intr[dev] = arg;
|
unmask_intr[dev] = arg;
|
return 0;
|
return 0;
|
|
|
case HDIO_GET_UNMASKINTR:
|
case HDIO_GET_UNMASKINTR:
|
if (!arg) return -EINVAL;
|
if (!arg) return -EINVAL;
|
err = verify_area(VERIFY_WRITE, (long *) arg, sizeof(long));
|
err = verify_area(VERIFY_WRITE, (long *) arg, sizeof(long));
|
if (err)
|
if (err)
|
return err;
|
return err;
|
put_user(unmask_intr[dev], (long *) arg);
|
put_user(unmask_intr[dev], (long *) arg);
|
return 0;
|
return 0;
|
|
|
case HDIO_GET_MULTCOUNT:
|
case HDIO_GET_MULTCOUNT:
|
if (!arg) return -EINVAL;
|
if (!arg) return -EINVAL;
|
err = verify_area(VERIFY_WRITE, (long *) arg, sizeof(long));
|
err = verify_area(VERIFY_WRITE, (long *) arg, sizeof(long));
|
if (err)
|
if (err)
|
return err;
|
return err;
|
put_user(mult_count[dev], (long *) arg);
|
put_user(mult_count[dev], (long *) arg);
|
return 0;
|
return 0;
|
|
|
case HDIO_SET_MULTCOUNT:
|
case HDIO_SET_MULTCOUNT:
|
if (!suser()) return -EACCES;
|
if (!suser()) return -EACCES;
|
if (MINOR(inode->i_rdev) & 0x3F) return -EINVAL;
|
if (MINOR(inode->i_rdev) & 0x3F) return -EINVAL;
|
save_flags(flags);
|
save_flags(flags);
|
cli(); /* a prior request might still be in progress */
|
cli(); /* a prior request might still be in progress */
|
if (arg > max_mult[dev])
|
if (arg > max_mult[dev])
|
err = -EINVAL; /* out of range for device */
|
err = -EINVAL; /* out of range for device */
|
else if (mult_req[dev] != mult_count[dev]) {
|
else if (mult_req[dev] != mult_count[dev]) {
|
special_op[dev] = 1;
|
special_op[dev] = 1;
|
err = -EBUSY; /* busy, try again */
|
err = -EBUSY; /* busy, try again */
|
} else {
|
} else {
|
mult_req[dev] = arg;
|
mult_req[dev] = arg;
|
special_op[dev] = 1;
|
special_op[dev] = 1;
|
err = 0;
|
err = 0;
|
}
|
}
|
restore_flags(flags);
|
restore_flags(flags);
|
return err;
|
return err;
|
|
|
case HDIO_GET_IDENTITY:
|
case HDIO_GET_IDENTITY:
|
if (!arg) return -EINVAL;
|
if (!arg) return -EINVAL;
|
if (MINOR(inode->i_rdev) & 0x3F) return -EINVAL;
|
if (MINOR(inode->i_rdev) & 0x3F) return -EINVAL;
|
if (hd_ident_info[dev] == NULL) return -ENOMSG;
|
if (hd_ident_info[dev] == NULL) return -ENOMSG;
|
err = verify_area(VERIFY_WRITE, (char *) arg, sizeof(struct hd_driveid));
|
err = verify_area(VERIFY_WRITE, (char *) arg, sizeof(struct hd_driveid));
|
if (err)
|
if (err)
|
return err;
|
return err;
|
memcpy_tofs((char *)arg, (char *) hd_ident_info[dev], sizeof(struct hd_driveid));
|
memcpy_tofs((char *)arg, (char *) hd_ident_info[dev], sizeof(struct hd_driveid));
|
return 0;
|
return 0;
|
|
|
RO_IOCTLS(inode->i_rdev,arg);
|
RO_IOCTLS(inode->i_rdev,arg);
|
default:
|
default:
|
return -EINVAL;
|
return -EINVAL;
|
}
|
}
|
}
|
}
|
|
|
static int hd_open(struct inode * inode, struct file * filp)
|
static int hd_open(struct inode * inode, struct file * filp)
|
{
|
{
|
int target;
|
int target;
|
target = DEVICE_NR(inode->i_rdev);
|
target = DEVICE_NR(inode->i_rdev);
|
|
|
if (target >= NR_HD)
|
if (target >= NR_HD)
|
return -ENODEV;
|
return -ENODEV;
|
while (busy[target])
|
while (busy[target])
|
sleep_on(&busy_wait);
|
sleep_on(&busy_wait);
|
access_count[target]++;
|
access_count[target]++;
|
return 0;
|
return 0;
|
}
|
}
|
|
|
/*
|
/*
|
* Releasing a block device means we sync() it, so that it can safely
|
* Releasing a block device means we sync() it, so that it can safely
|
* be forgotten about...
|
* be forgotten about...
|
*/
|
*/
|
static void hd_release(struct inode * inode, struct file * file)
|
static void hd_release(struct inode * inode, struct file * file)
|
{
|
{
|
int target;
|
int target;
|
sync_dev(inode->i_rdev);
|
sync_dev(inode->i_rdev);
|
|
|
target = DEVICE_NR(inode->i_rdev);
|
target = DEVICE_NR(inode->i_rdev);
|
access_count[target]--;
|
access_count[target]--;
|
|
|
}
|
}
|
|
|
static void hd_geninit(struct gendisk *);
|
static void hd_geninit(struct gendisk *);
|
|
|
static struct gendisk hd_gendisk = {
|
static struct gendisk hd_gendisk = {
|
MAJOR_NR, /* Major number */
|
MAJOR_NR, /* Major number */
|
"hd", /* Major name */
|
"hd", /* Major name */
|
6, /* Bits to shift to get real from partition */
|
6, /* Bits to shift to get real from partition */
|
1 << 6, /* Number of partitions per real */
|
1 << 6, /* Number of partitions per real */
|
MAX_HD, /* maximum number of real */
|
MAX_HD, /* maximum number of real */
|
hd_geninit, /* init function */
|
hd_geninit, /* init function */
|
hd, /* hd struct */
|
hd, /* hd struct */
|
hd_sizes, /* block sizes */
|
hd_sizes, /* block sizes */
|
0, /* number */
|
0, /* number */
|
(void *) bios_info, /* internal */
|
(void *) bios_info, /* internal */
|
NULL /* next */
|
NULL /* next */
|
};
|
};
|
|
|
static void hd_interrupt(int irq, void *dev_id, struct pt_regs *regs)
|
static void hd_interrupt(int irq, void *dev_id, struct pt_regs *regs)
|
{
|
{
|
void (*handler)(void) = DEVICE_INTR;
|
void (*handler)(void) = DEVICE_INTR;
|
|
|
DEVICE_INTR = NULL;
|
DEVICE_INTR = NULL;
|
timer_active &= ~(1<<HD_TIMER);
|
timer_active &= ~(1<<HD_TIMER);
|
if (!handler)
|
if (!handler)
|
handler = unexpected_hd_interrupt;
|
handler = unexpected_hd_interrupt;
|
handler();
|
handler();
|
sti();
|
sti();
|
}
|
}
|
|
|
/*
|
/*
|
* Since we find out the physical drive geometry, we don't touch that.
|
* Since we find out the physical drive geometry, we don't touch that.
|
* We only alter the logical disk geometry that is passed to user programs.
|
* We only alter the logical disk geometry that is passed to user programs.
|
* [as per PC Linux].
|
* [as per PC Linux].
|
*/
|
*/
|
void hd_set_geometry (kdev_t dev, unsigned char secspertrack, unsigned char heads,
|
void hd_set_geometry (kdev_t dev, unsigned char secspertrack, unsigned char heads,
|
unsigned long discsize, unsigned int secsize)
|
unsigned long discsize, unsigned int secsize)
|
{
|
{
|
int minor = MINOR(dev);
|
int minor = MINOR(dev);
|
int drv = minor >> 6;
|
int drv = minor >> 6;
|
|
|
if (bios_info[drv].cyl == 1) {
|
if (bios_info[drv].cyl == 1) {
|
bios_info[drv].cyl = discsize / (secspertrack * heads * secsize);
|
bios_info[drv].cyl = discsize / (secspertrack * heads * secsize);
|
bios_info[drv].head = heads;
|
bios_info[drv].head = heads;
|
bios_info[drv].wpcom = -1;
|
bios_info[drv].wpcom = -1;
|
bios_info[drv].ctl = 8;
|
bios_info[drv].ctl = 8;
|
bios_info[drv].lzone = bios_info[drv].cyl - 1;
|
bios_info[drv].lzone = bios_info[drv].cyl - 1;
|
bios_info[drv].sect = secspertrack;
|
bios_info[drv].sect = secspertrack;
|
}
|
}
|
hd[minor].start_sect = 0;
|
hd[minor].start_sect = 0;
|
hd[minor].nr_sects = discsize / secsize;
|
hd[minor].nr_sects = discsize / secsize;
|
}
|
}
|
|
|
/*
|
/*
|
* This is the harddisk IRQ description. The SA_INTERRUPT in sa_flags
|
* This is the harddisk IRQ description. The SA_INTERRUPT in sa_flags
|
* means we run the IRQ-handler with interrupts disabled: this is bad for
|
* means we run the IRQ-handler with interrupts disabled: this is bad for
|
* interrupt latency, but anything else has led to problems on some
|
* interrupt latency, but anything else has led to problems on some
|
* machines...
|
* machines...
|
*
|
*
|
* We enable interrupts in some of the routines after making sure it's
|
* We enable interrupts in some of the routines after making sure it's
|
* safe.
|
* safe.
|
*/
|
*/
|
static void hd_geninit(struct gendisk *ignored)
|
static void hd_geninit(struct gendisk *ignored)
|
{
|
{
|
int i;
|
int i;
|
|
|
if (!NR_HD) {
|
if (!NR_HD) {
|
int drive;
|
int drive;
|
extern int number_ide_drives;
|
extern int number_ide_drives;
|
/*
|
/*
|
* Default settings
|
* Default settings
|
*
|
*
|
* If we don't know anything about the drive, then set it
|
* If we don't know anything about the drive, then set it
|
* so that we have enough to read the boot sector of the
|
* so that we have enough to read the boot sector of the
|
* ADFS drive. This means that you *MUST* specify the
|
* ADFS drive. This means that you *MUST* specify the
|
* drive parameters of *all* drives if you have one IDE
|
* drive parameters of *all* drives if you have one IDE
|
* drive that is not ADFS formatted.
|
* drive that is not ADFS formatted.
|
*/
|
*/
|
for (drive=0 ; drive<2 ; drive++) {
|
for (drive=0 ; drive<2 ; drive++) {
|
bios_info[drive].cyl = hd_info[drive].cyl = 1;
|
bios_info[drive].cyl = hd_info[drive].cyl = 1;
|
bios_info[drive].head = hd_info[drive].head = 1;
|
bios_info[drive].head = hd_info[drive].head = 1;
|
bios_info[drive].wpcom = hd_info[drive].wpcom = -1;
|
bios_info[drive].wpcom = hd_info[drive].wpcom = -1;
|
bios_info[drive].ctl = hd_info[drive].ctl = 8;
|
bios_info[drive].ctl = hd_info[drive].ctl = 8;
|
bios_info[drive].lzone = hd_info[drive].lzone = 1;
|
bios_info[drive].lzone = hd_info[drive].lzone = 1;
|
bios_info[drive].sect = hd_info[drive].sect = 17;
|
bios_info[drive].sect = hd_info[drive].sect = 17;
|
}
|
}
|
|
|
/*
|
/*
|
* We only set this to the one that the host OS gave us
|
* We only set this to the one that the host OS gave us
|
* if the user has not defined any types.
|
* if the user has not defined any types.
|
*/
|
*/
|
NR_HD = number_ide_drives;
|
NR_HD = number_ide_drives;
|
}
|
}
|
|
|
i = NR_HD;
|
i = NR_HD;
|
while (i-- > 0) {
|
while (i-- > 0) {
|
/*
|
/*
|
* The newer E-IDE BIOSs handle drives larger than 1024
|
* The newer E-IDE BIOSs handle drives larger than 1024
|
* cylinders by increasing the number of logical heads
|
* cylinders by increasing the number of logical heads
|
* to keep the number of logical cylinders below the
|
* to keep the number of logical cylinders below the
|
* sacred INT13 limit of 1024 (10 bits). If that is
|
* sacred INT13 limit of 1024 (10 bits). If that is
|
* what's happening here, we'll find out and correct
|
* what's happening here, we'll find out and correct
|
* it later when "identifying" the drive.
|
* it later when "identifying" the drive.
|
*/
|
*/
|
hd[i<<6].nr_sects = bios_info[i].head *
|
hd[i<<6].nr_sects = bios_info[i].head *
|
bios_info[i].sect * bios_info[i].cyl;
|
bios_info[i].sect * bios_info[i].cyl;
|
hd_ident_info[i] = (struct hd_driveid *) kmalloc(512,GFP_KERNEL);
|
hd_ident_info[i] = (struct hd_driveid *) kmalloc(512,GFP_KERNEL);
|
special_op[i] = 1;
|
special_op[i] = 1;
|
}
|
}
|
if (NR_HD) {
|
if (NR_HD) {
|
if (request_irq(HD_IRQ, hd_interrupt, SA_INTERRUPT, "hd", NULL)) {
|
if (request_irq(HD_IRQ, hd_interrupt, SA_INTERRUPT, "hd", NULL)) {
|
printk("hd: unable to get IRQ%d for the harddisk driver\n",HD_IRQ);
|
printk("hd: unable to get IRQ%d for the harddisk driver\n",HD_IRQ);
|
NR_HD = 0;
|
NR_HD = 0;
|
} else {
|
} else {
|
request_region(HD_DATA, 8, "hd");
|
request_region(HD_DATA, 8, "hd");
|
request_region(HD_CMD, 1, "hd(cmd)");
|
request_region(HD_CMD, 1, "hd(cmd)");
|
}
|
}
|
}
|
}
|
hd_gendisk.nr_real = NR_HD;
|
hd_gendisk.nr_real = NR_HD;
|
|
|
for (i = 0; i < (MAX_HD << 6); i++) {
|
for (i = 0; i < (MAX_HD << 6); i++) {
|
hd_blocksizes[i] = 1024;
|
hd_blocksizes[i] = 1024;
|
hd_hardsectsizes[i] = 512;
|
hd_hardsectsizes[i] = 512;
|
}
|
}
|
blksize_size[MAJOR_NR] = hd_blocksizes;
|
blksize_size[MAJOR_NR] = hd_blocksizes;
|
hardsect_size[MAJOR_NR] = hd_hardsectsizes;
|
hardsect_size[MAJOR_NR] = hd_hardsectsizes;
|
}
|
}
|
|
|
static struct file_operations hd_fops = {
|
static struct file_operations hd_fops = {
|
NULL, /* lseek - default */
|
NULL, /* lseek - default */
|
block_read, /* read - general block-dev read */
|
block_read, /* read - general block-dev read */
|
block_write, /* write - general block-dev write */
|
block_write, /* write - general block-dev write */
|
NULL, /* readdir - bad */
|
NULL, /* readdir - bad */
|
NULL, /* select */
|
NULL, /* select */
|
hd_ioctl, /* ioctl */
|
hd_ioctl, /* ioctl */
|
NULL, /* mmap */
|
NULL, /* mmap */
|
hd_open, /* open */
|
hd_open, /* open */
|
hd_release, /* release */
|
hd_release, /* release */
|
block_fsync /* fsync */
|
block_fsync /* fsync */
|
};
|
};
|
|
|
int hd_init(void)
|
int hd_init(void)
|
{
|
{
|
if (register_blkdev(MAJOR_NR,"hd",&hd_fops)) {
|
if (register_blkdev(MAJOR_NR,"hd",&hd_fops)) {
|
printk("hd: unable to get major %d for harddisk\n",MAJOR_NR);
|
printk("hd: unable to get major %d for harddisk\n",MAJOR_NR);
|
return -1;
|
return -1;
|
}
|
}
|
blk_dev[MAJOR_NR].request_fn = DEVICE_REQUEST;
|
blk_dev[MAJOR_NR].request_fn = DEVICE_REQUEST;
|
read_ahead[MAJOR_NR] = 8; /* 8 sector (4kB) read-ahead */
|
read_ahead[MAJOR_NR] = 8; /* 8 sector (4kB) read-ahead */
|
hd_gendisk.next = gendisk_head;
|
hd_gendisk.next = gendisk_head;
|
gendisk_head = &hd_gendisk;
|
gendisk_head = &hd_gendisk;
|
timer_table[HD_TIMER].fn = hd_times_out;
|
timer_table[HD_TIMER].fn = hd_times_out;
|
return 0;
|
return 0;
|
}
|
}
|
|
|
#define DEVICE_BUSY busy[target]
|
#define DEVICE_BUSY busy[target]
|
#define USAGE access_count[target]
|
#define USAGE access_count[target]
|
#define CAPACITY (bios_info[target].head*bios_info[target].sect*bios_info[target].cyl)
|
#define CAPACITY (bios_info[target].head*bios_info[target].sect*bios_info[target].cyl)
|
/* We assume that the the bios parameters do not change, so the disk capacity
|
/* We assume that the the bios parameters do not change, so the disk capacity
|
will not change */
|
will not change */
|
#undef MAYBE_REINIT
|
#undef MAYBE_REINIT
|
#define GENDISK_STRUCT hd_gendisk
|
#define GENDISK_STRUCT hd_gendisk
|
|
|
/*
|
/*
|
* This routine is called to flush all partitions and partition tables
|
* This routine is called to flush all partitions and partition tables
|
* for a changed scsi disk, and then re-read the new partition table.
|
* for a changed scsi disk, and then re-read the new partition table.
|
* If we are revalidating a disk because of a media change, then we
|
* If we are revalidating a disk because of a media change, then we
|
* enter with usage == 0. If we are using an ioctl, we automatically have
|
* enter with usage == 0. If we are using an ioctl, we automatically have
|
* usage == 1 (we need an open channel to use an ioctl :-), so this
|
* usage == 1 (we need an open channel to use an ioctl :-), so this
|
* is our limit.
|
* is our limit.
|
*/
|
*/
|
static int revalidate_hddisk(kdev_t dev, int maxusage)
|
static int revalidate_hddisk(kdev_t dev, int maxusage)
|
{
|
{
|
int target;
|
int target;
|
struct gendisk * gdev;
|
struct gendisk * gdev;
|
int max_p;
|
int max_p;
|
int start;
|
int start;
|
int i;
|
int i;
|
long flags;
|
long flags;
|
|
|
target = DEVICE_NR(dev);
|
target = DEVICE_NR(dev);
|
gdev = &GENDISK_STRUCT;
|
gdev = &GENDISK_STRUCT;
|
|
|
save_flags_cli (flags);
|
save_flags_cli (flags);
|
if (DEVICE_BUSY || USAGE > maxusage) {
|
if (DEVICE_BUSY || USAGE > maxusage) {
|
restore_flags(flags);
|
restore_flags(flags);
|
return -EBUSY;
|
return -EBUSY;
|
};
|
};
|
DEVICE_BUSY = 1;
|
DEVICE_BUSY = 1;
|
restore_flags(flags);
|
restore_flags(flags);
|
|
|
max_p = gdev->max_p;
|
max_p = gdev->max_p;
|
start = target << gdev->minor_shift;
|
start = target << gdev->minor_shift;
|
|
|
for (i=max_p - 1; i >=0 ; i--) {
|
for (i=max_p - 1; i >=0 ; i--) {
|
int minor = start + i;
|
int minor = start + i;
|
kdev_t devi = MKDEV(MAJOR_NR, minor);
|
kdev_t devi = MKDEV(MAJOR_NR, minor);
|
sync_dev(devi);
|
sync_dev(devi);
|
invalidate_inodes(devi);
|
invalidate_inodes(devi);
|
invalidate_buffers(devi);
|
invalidate_buffers(devi);
|
gdev->part[minor].start_sect = 0;
|
gdev->part[minor].start_sect = 0;
|
gdev->part[minor].nr_sects = 0;
|
gdev->part[minor].nr_sects = 0;
|
};
|
};
|
|
|
#ifdef MAYBE_REINIT
|
#ifdef MAYBE_REINIT
|
MAYBE_REINIT;
|
MAYBE_REINIT;
|
#endif
|
#endif
|
|
|
gdev->part[start].nr_sects = CAPACITY;
|
gdev->part[start].nr_sects = CAPACITY;
|
resetup_one_dev(gdev, target);
|
resetup_one_dev(gdev, target);
|
|
|
DEVICE_BUSY = 0;
|
DEVICE_BUSY = 0;
|
wake_up(&busy_wait);
|
wake_up(&busy_wait);
|
return 0;
|
return 0;
|
}
|
}
|
|
|
|
|
