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path: root/drivers/ide/ide-disk.c
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Diffstat (limited to 'drivers/ide/ide-disk.c')
-rw-r--r--drivers/ide/ide-disk.c75
1 files changed, 63 insertions, 12 deletions
diff --git a/drivers/ide/ide-disk.c b/drivers/ide/ide-disk.c
index c6f7fcfb9d6..6a1de216970 100644
--- a/drivers/ide/ide-disk.c
+++ b/drivers/ide/ide-disk.c
@@ -302,14 +302,12 @@ static const struct drive_list_entry hpa_list[] = {
{ NULL, NULL }
};
-static void idedisk_check_hpa(ide_drive_t *drive)
+static u64 ide_disk_hpa_get_native_capacity(ide_drive_t *drive, int lba48)
{
- unsigned long long capacity, set_max;
- int lba48 = ata_id_lba48_enabled(drive->id);
+ u64 capacity, set_max;
capacity = drive->capacity64;
-
- set_max = idedisk_read_native_max_address(drive, lba48);
+ set_max = idedisk_read_native_max_address(drive, lba48);
if (ide_in_drive_list(drive->id, hpa_list)) {
/*
@@ -320,9 +318,31 @@ static void idedisk_check_hpa(ide_drive_t *drive)
set_max--;
}
+ return set_max;
+}
+
+static u64 ide_disk_hpa_set_capacity(ide_drive_t *drive, u64 set_max, int lba48)
+{
+ set_max = idedisk_set_max_address(drive, set_max, lba48);
+ if (set_max)
+ drive->capacity64 = set_max;
+
+ return set_max;
+}
+
+static void idedisk_check_hpa(ide_drive_t *drive)
+{
+ u64 capacity, set_max;
+ int lba48 = ata_id_lba48_enabled(drive->id);
+
+ capacity = drive->capacity64;
+ set_max = ide_disk_hpa_get_native_capacity(drive, lba48);
+
if (set_max <= capacity)
return;
+ drive->probed_capacity = set_max;
+
printk(KERN_INFO "%s: Host Protected Area detected.\n"
"\tcurrent capacity is %llu sectors (%llu MB)\n"
"\tnative capacity is %llu sectors (%llu MB)\n",
@@ -330,13 +350,13 @@ static void idedisk_check_hpa(ide_drive_t *drive)
capacity, sectors_to_MB(capacity),
set_max, sectors_to_MB(set_max));
- set_max = idedisk_set_max_address(drive, set_max, lba48);
+ if ((drive->dev_flags & IDE_DFLAG_NOHPA) == 0)
+ return;
- if (set_max) {
- drive->capacity64 = set_max;
+ set_max = ide_disk_hpa_set_capacity(drive, set_max, lba48);
+ if (set_max)
printk(KERN_INFO "%s: Host Protected Area disabled.\n",
drive->name);
- }
}
static int ide_disk_get_capacity(ide_drive_t *drive)
@@ -358,6 +378,8 @@ static int ide_disk_get_capacity(ide_drive_t *drive)
drive->capacity64 = drive->cyl * drive->head * drive->sect;
}
+ drive->probed_capacity = drive->capacity64;
+
if (lba) {
drive->dev_flags |= IDE_DFLAG_LBA;
@@ -376,7 +398,7 @@ static int ide_disk_get_capacity(ide_drive_t *drive)
"%llu sectors (%llu MB)\n",
drive->name, (unsigned long long)drive->capacity64,
sectors_to_MB(drive->capacity64));
- drive->capacity64 = 1ULL << 28;
+ drive->probed_capacity = drive->capacity64 = 1ULL << 28;
}
if ((drive->hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA) &&
@@ -392,6 +414,34 @@ static int ide_disk_get_capacity(ide_drive_t *drive)
return 0;
}
+static u64 ide_disk_set_capacity(ide_drive_t *drive, u64 capacity)
+{
+ u64 set = min(capacity, drive->probed_capacity);
+ u16 *id = drive->id;
+ int lba48 = ata_id_lba48_enabled(id);
+
+ if ((drive->dev_flags & IDE_DFLAG_LBA) == 0 ||
+ ata_id_hpa_enabled(id) == 0)
+ goto out;
+
+ /*
+ * according to the spec the SET MAX ADDRESS command shall be
+ * immediately preceded by a READ NATIVE MAX ADDRESS command
+ */
+ capacity = ide_disk_hpa_get_native_capacity(drive, lba48);
+ if (capacity == 0)
+ goto out;
+
+ set = ide_disk_hpa_set_capacity(drive, set, lba48);
+ if (set) {
+ /* needed for ->resume to disable HPA */
+ drive->dev_flags |= IDE_DFLAG_NOHPA;
+ return set;
+ }
+out:
+ return drive->capacity64;
+}
+
static void idedisk_prepare_flush(struct request_queue *q, struct request *rq)
{
ide_drive_t *drive = q->queuedata;
@@ -428,14 +478,14 @@ static int set_multcount(ide_drive_t *drive, int arg)
if (arg < 0 || arg > (drive->id[ATA_ID_MAX_MULTSECT] & 0xff))
return -EINVAL;
- if (drive->special.b.set_multmode)
+ if (drive->special_flags & IDE_SFLAG_SET_MULTMODE)
return -EBUSY;
rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
rq->cmd_type = REQ_TYPE_ATA_TASKFILE;
drive->mult_req = arg;
- drive->special.b.set_multmode = 1;
+ drive->special_flags |= IDE_SFLAG_SET_MULTMODE;
error = blk_execute_rq(drive->queue, NULL, rq, 0);
blk_put_request(rq);
@@ -740,6 +790,7 @@ static int ide_disk_set_doorlock(ide_drive_t *drive, struct gendisk *disk,
const struct ide_disk_ops ide_ata_disk_ops = {
.check = ide_disk_check,
+ .set_capacity = ide_disk_set_capacity,
.get_capacity = ide_disk_get_capacity,
.setup = ide_disk_setup,
.flush = ide_disk_flush,