Commit 78808d51 authored by Bartlomiej Zolnierkiewicz's avatar Bartlomiej Zolnierkiewicz Committed by Linus Torvalds

[PATCH] fix CONFIG_IDEDISK_STROKE support in ide-disk.c

Original patch from Erik Andersen <andersen@codepoet.org>:
- fix CONFIG_IDEDISK_STROKE by adding proper detection of HPA feature set
  and removing IDE_STROKE_LIMIT
- remove irrelevant idedisk_supports_host_protected_area()
- make the HPA detection actually display useful information

I've reworked it a bit:
- detect HPA before calculating drive's geometry
- move HPA detection outside init_idedisk_capacity()
  to idedisk_check_hpa_lba28() and idedisk_check_hpa_lba48()
- use sectors_to_MB()
- respect 80-column limit
parent c98a3356
......@@ -67,6 +67,7 @@
#include <asm/irq.h>
#include <asm/uaccess.h>
#include <asm/io.h>
#include <asm/div64.h>
/* FIXME: some day we shouldn't need to look in here! */
......@@ -1073,16 +1074,56 @@ static unsigned long long sectors_to_MB(unsigned long long n)
return n;
}
/*
* Tests if the drive supports Host Protected Area feature.
* Returns true if supported, false otherwise.
*/
static inline int idedisk_supports_host_protected_area(ide_drive_t *drive)
static inline void idedisk_check_hpa_lba28(ide_drive_t *drive)
{
unsigned long capacity, set_max;
capacity = drive->id->lba_capacity;
set_max = idedisk_read_native_max_address(drive);
if (set_max <= capacity)
return;
printk(KERN_INFO "%s: Host Protected Area detected.\n"
"\tcurrent capacity is %ld sectors (%ld MB)\n"
"\tnative capacity is %ld sectors (%ld MB)\n",
drive->name,
capacity, (capacity - capacity/625 + 974)/1950,
set_max, (set_max - set_max/625 + 974)/1950);
#ifdef CONFIG_IDEDISK_STROKE
set_max = idedisk_set_max_address(drive, set_max);
if (set_max) {
drive->id->lba_capacity = set_max;
printk(KERN_INFO "%s: Host Protected Area disabled.\n",
drive->name);
}
#endif
}
static inline void idedisk_check_hpa_lba48(ide_drive_t *drive)
{
int flag = (drive->id->cfs_enable_1 & 0x0400) ? 1 : 0;
if (flag)
printk(KERN_INFO "%s: host protected area => %d\n", drive->name, flag);
return flag;
unsigned long long capacity_2, set_max_ext;
capacity_2 = drive->id->lba_capacity_2;
set_max_ext = idedisk_read_native_max_address_ext(drive);
if (set_max_ext <= capacity_2)
return;
printk(KERN_INFO "%s: Host Protected Area detected.\n"
"\tcurrent capacity is %lld sectors (%lld MB)\n"
"\tnative capacity is %lld sectors (%lld MB)\n",
drive->name,
capacity_2, sectors_to_MB(capacity_2),
set_max_ext, sectors_to_MB(set_max_ext));
#ifdef CONFIG_IDEDISK_STROKE
set_max_ext = idedisk_set_max_address_ext(drive, set_max_ext);
if (set_max_ext) {
drive->id->lba_capacity_2 = set_max_ext;
printk(KERN_INFO "%s: Host Protected Area disabled.\n",
drive->name);
}
#endif
}
/*
......@@ -1099,64 +1140,43 @@ static inline int idedisk_supports_host_protected_area(ide_drive_t *drive)
* in above order (i.e., if value of higher priority is available,
* reset will be ignored).
*/
#define IDE_STROKE_LIMIT (32000*1024*2)
static void init_idedisk_capacity (ide_drive_t *drive)
{
struct hd_driveid *id = drive->id;
unsigned long capacity, set_max;
unsigned long long capacity_2, set_max_ext;
capacity_2 = capacity = drive->cyl * drive->head * drive->sect;
/*
* If this drive supports the Host Protected Area feature set,
* then we may need to change our opinion about the drive's capacity.
*/
int hpa = (id->command_set_1 & 0x0400) && (id->cfs_enable_1 & 0x0400);
(void) idedisk_supports_host_protected_area(drive);
if ((id->command_set_2 & 0x0400) && (id->cfs_enable_2 & 0x0400)) {
/* drive speaks 48-bit LBA */
unsigned long long capacity_2;
if (id->cfs_enable_2 & 0x0400) {
drive->select.b.lba = 1;
if (hpa)
idedisk_check_hpa_lba48(drive);
capacity_2 = id->lba_capacity_2;
drive->head = drive->bios_head = 255;
drive->sect = drive->bios_sect = 63;
drive->select.b.lba = 1;
set_max_ext = idedisk_read_native_max_address_ext(drive);
if (set_max_ext > capacity_2 && capacity_2 > IDE_STROKE_LIMIT) {
#ifdef CONFIG_IDEDISK_STROKE
set_max_ext = idedisk_set_max_address_ext(drive, set_max_ext);
if (set_max_ext)
id->lba_capacity_2 = capacity_2 = set_max_ext;
#else /* !CONFIG_IDEDISK_STROKE */
printk(KERN_INFO "%s: setmax_ext LBA %llu, native %llu\n",
drive->name, set_max_ext, capacity_2);
#endif /* CONFIG_IDEDISK_STROKE */
}
drive->cyl = (unsigned int) capacity_2 / (drive->head * drive->sect);
drive->bios_cyl = drive->cyl;
drive->capacity48 = capacity_2;
drive->capacity = (unsigned long) capacity_2;
return;
/* Determine capacity, and use LBA if the drive properly supports it */
} else if ((id->capability & 2) && lba_capacity_is_ok(id)) {
/* drive speaks 28-bit LBA */
unsigned long capacity;
drive->select.b.lba = 1;
if (hpa)
idedisk_check_hpa_lba28(drive);
capacity = id->lba_capacity;
drive->cyl = capacity / (drive->head * drive->sect);
drive->select.b.lba = 1;
} else {
drive->capacity = capacity;
return;
}
set_max = idedisk_read_native_max_address(drive);
if (set_max > capacity && capacity > IDE_STROKE_LIMIT) {
#ifdef CONFIG_IDEDISK_STROKE
set_max = idedisk_set_max_address(drive, set_max);
if (set_max) {
drive->capacity = capacity = set_max;
drive->cyl = set_max / (drive->head * drive->sect);
drive->select.b.lba = 1;
drive->id->lba_capacity = capacity;
}
#else /* !CONFIG_IDEDISK_STROKE */
printk(KERN_INFO "%s: setmax LBA %lu, native %lu\n",
drive->name, set_max, capacity);
#endif /* CONFIG_IDEDISK_STROKE */
} else {
/* drive speaks boring old 28-bit CHS */
drive->capacity = drive->cyl * drive->head * drive->sect;
}
drive->capacity = capacity;
}
static sector_t idedisk_capacity (ide_drive_t *drive)
......
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