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[PATCH] libata: implement ata_dev_enabled and disabled()

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This patch renames ata_dev_present() to ata_dev_enabled() and adds
ata_dev_disabled().  This is to discern the state where a device is
present but disabled from not-present state.  This disctinction is
necessary when configuring transfer mode because device selection
timing must not be violated even if a device fails to configure.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Tejun Heo 2006-04-01 01:38:18 +09:00 committed by Jeff Garzik
parent 9974e7cc6c
commit e1211e3fa7
5 changed files with 29 additions and 19 deletions
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24
drivers/scsi/libata-core.c
View file

@ -411,7 +411,7 @@ static const char *sata_spd_string(unsigned int spd)
static void ata_dev_disable(struct ata_port *ap, struct ata_device *dev)
{
if (ata_dev_present(dev)) {
if (ata_dev_enabled(dev)) {
printk(KERN_WARNING "ata%u: dev %u disabled\n",
ap->id, dev->devno);
dev->class++;
@ -1222,7 +1222,7 @@ static int ata_dev_configure(struct ata_port *ap, struct ata_device *dev,
unsigned int xfer_mask;
int i, rc;
if (!ata_dev_present(dev)) {
if (!ata_dev_enabled(dev)) {
DPRINTK("ENTER/EXIT (host %u, dev %u) -- nodev\n",
ap->id, dev->devno);
return 0;
@ -1401,7 +1401,7 @@ static int ata_bus_probe(struct ata_port *ap)
dev->class = classes[i];
if (!ata_dev_present(dev))
if (!ata_dev_enabled(dev))
continue;
WARN_ON(dev->id != NULL);
@ -1565,7 +1565,7 @@ void sata_phy_reset(struct ata_port *ap)
struct ata_device *ata_dev_pair(struct ata_port *ap, struct ata_device *adev)
{
struct ata_device *pair = &ap->device[1 - adev->devno];
if (!ata_dev_present(pair))
if (!ata_dev_enabled(pair))
return NULL;
return pair;
}
@ -1778,7 +1778,7 @@ static int ata_host_set_pio(struct ata_port *ap)
for (i = 0; i < ATA_MAX_DEVICES; i++) {
struct ata_device *dev = &ap->device[i];
if (!ata_dev_present(dev))
if (!ata_dev_enabled(dev))
continue;
if (!dev->pio_mode) {
@ -1802,7 +1802,7 @@ static void ata_host_set_dma(struct ata_port *ap)
for (i = 0; i < ATA_MAX_DEVICES; i++) {
struct ata_device *dev = &ap->device[i];
if (!ata_dev_present(dev) || !dev->dma_mode)
if (!ata_dev_enabled(dev) || !dev->dma_mode)
continue;
dev->xfer_mode = dev->dma_mode;
@ -1830,7 +1830,7 @@ static void ata_set_mode(struct ata_port *ap)
struct ata_device *dev = &ap->device[i];
unsigned int pio_mask, dma_mask;
if (!ata_dev_present(dev))
if (!ata_dev_enabled(dev))
continue;
ata_dev_xfermask(ap, dev);
@ -1858,7 +1858,7 @@ static void ata_set_mode(struct ata_port *ap)
for (i = 0; i < ATA_MAX_DEVICES; i++) {
struct ata_device *dev = &ap->device[i];
if (!ata_dev_present(dev))
if (!ata_dev_enabled(dev))
continue;
rc = ata_dev_set_mode(ap, dev);
@ -2550,7 +2550,7 @@ int ata_dev_revalidate(struct ata_port *ap, struct ata_device *dev,
u16 *id;
int rc;
if (!ata_dev_present(dev))
if (!ata_dev_enabled(dev))
return -ENODEV;
class = dev->class;
@ -2679,7 +2679,7 @@ static void ata_dev_xfermask(struct ata_port *ap, struct ata_device *dev)
/* FIXME: Use port-wide xfermask for now */
for (i = 0; i < ATA_MAX_DEVICES; i++) {
struct ata_device *d = &ap->device[i];
if (!ata_dev_present(d))
if (!ata_dev_enabled(d))
continue;
xfer_mask &= ata_pack_xfermask(d->pio_mask, d->mwdma_mask,
d->udma_mask);
@ -4299,7 +4299,7 @@ int ata_device_resume(struct ata_port *ap, struct ata_device *dev)
ap->flags &= ~ATA_FLAG_SUSPENDED;
ata_set_mode(ap);
}
if (!ata_dev_present(dev))
if (!ata_dev_enabled(dev))
return 0;
if (dev->class == ATA_DEV_ATA)
ata_start_drive(ap, dev);
@ -4317,7 +4317,7 @@ int ata_device_resume(struct ata_port *ap, struct ata_device *dev)
*/
int ata_device_suspend(struct ata_port *ap, struct ata_device *dev, pm_message_t state)
{
if (!ata_dev_present(dev))
if (!ata_dev_enabled(dev))
return 0;
if (dev->class == ATA_DEV_ATA)
ata_flush_cache(ap, dev);

4
drivers/scsi/libata-scsi.c
View file

@ -2349,7 +2349,7 @@ ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev)
(scsidev->lun != 0)))
return NULL;
if (unlikely(!ata_dev_present(dev)))
if (unlikely(!ata_dev_enabled(dev)))
return NULL;
if (!atapi_enabled || (ap->flags & ATA_FLAG_NO_ATAPI)) {
@ -2743,7 +2743,7 @@ void ata_scsi_scan_host(struct ata_port *ap)
for (i = 0; i < ATA_MAX_DEVICES; i++) {
dev = &ap->device[i];
if (ata_dev_present(dev))
if (ata_dev_enabled(dev))
scsi_scan_target(&ap->host->shost_gendev, 0, i, 0, 0);
}
}

2
drivers/scsi/sata_mv.c
View file

@ -1991,7 +1991,7 @@ static void __mv_phy_reset(struct ata_port *ap, int can_sleep)
tf.nsect = readb((void __iomem *) ap->ioaddr.nsect_addr);
dev->class = ata_dev_classify(&tf);
if (!ata_dev_present(dev)) {
if (!ata_dev_enabled(dev)) {
VPRINTK("Port disabled post-sig: No device present.\n");
ata_port_disable(ap);
}

2
drivers/scsi/sata_sil.c
View file

@ -264,7 +264,7 @@ static void sil_post_set_mode (struct ata_port *ap)
for (i = 0; i < 2; i++) {
dev = &ap->device[i];
if (!ata_dev_present(dev))
if (!ata_dev_enabled(dev))
dev_mode[i] = 0; /* PIO0/1/2 */
else if (dev->flags & ATA_DFLAG_PIO)
dev_mode[i] = 1; /* PIO3/4 */

16
include/linux/libata.h
View file

@ -672,14 +672,24 @@ static inline unsigned int ata_tag_valid(unsigned int tag)
return (tag < ATA_MAX_QUEUE) ? 1 : 0;
}
static inline unsigned int ata_class_present(unsigned int class)
static inline unsigned int ata_class_enabled(unsigned int class)
{
return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI;
}
static inline unsigned int ata_dev_present(const struct ata_device *dev)
static inline unsigned int ata_class_disabled(unsigned int class)
{
return ata_class_present(dev->class);
return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP;
}
static inline unsigned int ata_dev_enabled(const struct ata_device *dev)
{
return ata_class_enabled(dev->class);
}
static inline unsigned int ata_dev_disabled(const struct ata_device *dev)
{
return ata_class_disabled(dev->class);
}
static inline u8 ata_chk_status(struct ata_port *ap)