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libata: update ata_dev_try_classify() arguments 

Make ata_dev_try_classify() take a pointer to ata_device instead of
ata_port/port_number combination for consistency and add @present
argument.  @present indicates whether the device seems present during
reset.  It's the result of TF access during softreset and link
onlineness during hardreset.  @present will be used to improve
diagnostic failure handling.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Tejun Heo 2007-09-02 23:23:57 +09:00 committed by Jeff Garzik
parent 7a234aff3d
commit 3f19859ee9
4 changed files with 23 additions and 18 deletions
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30
drivers/ata/libata-core.c
View File

@ -701,8 +701,8 @@ unsigned int ata_dev_classify(const struct ata_taskfile *tf)
/**
* ata_dev_try_classify - Parse returned ATA device signature
* @ap: ATA channel to examine
* @device: Device to examine (starting at zero)
* @dev: ATA device to classify (starting at zero)
* @present: device seems present
* @r_err: Value of error register on completion
*
* After an event -- SRST, E.D.D., or SATA COMRESET -- occurs,
@ -720,15 +720,15 @@ unsigned int ata_dev_classify(const struct ata_taskfile *tf)
* RETURNS:
* Device type - %ATA_DEV_ATA, %ATA_DEV_ATAPI or %ATA_DEV_NONE.
*/
unsigned int
ata_dev_try_classify(struct ata_port *ap, unsigned int device, u8 *r_err)
unsigned int ata_dev_try_classify(struct ata_device *dev, int present,
u8 *r_err)
{
struct ata_port *ap = dev->link->ap;
struct ata_taskfile tf;
unsigned int class;
u8 err;
ap->ops->dev_select(ap, device);
ap->ops->dev_select(ap, dev->devno);
memset(&tf, 0, sizeof(tf));
@ -738,12 +738,12 @@ ata_dev_try_classify(struct ata_port *ap, unsigned int device, u8 *r_err)
*r_err = err;
/* see if device passed diags: if master then continue and warn later */
if (err == 0 && device == 0)
if (err == 0 && dev->devno == 0)
/* diagnostic fail : do nothing _YET_ */
ap->link.device[device].horkage |= ATA_HORKAGE_DIAGNOSTIC;
dev->horkage |= ATA_HORKAGE_DIAGNOSTIC;
else if (err == 1)
/* do nothing */ ;
else if ((device == 0) && (err == 0x81))
else if ((dev->devno == 0) && (err == 0x81))
/* do nothing */ ;
else
return ATA_DEV_NONE;
@ -3238,9 +3238,9 @@ void ata_bus_reset(struct ata_port *ap)
/*
* determine by signature whether we have ATA or ATAPI devices
*/
device[0].class = ata_dev_try_classify(ap, 0, &err);
device[0].class = ata_dev_try_classify(&device[0], dev0, &err);
if ((slave_possible) && (err != 0x81))
device[1].class = ata_dev_try_classify(ap, 1, &err);
device[1].class = ata_dev_try_classify(&device[1], dev1, &err);
/* is double-select really necessary? */
if (device[1].class != ATA_DEV_NONE)
@ -3479,9 +3479,11 @@ int ata_std_softreset(struct ata_link *link, unsigned int *classes,
}
/* determine by signature whether we have ATA or ATAPI devices */
classes[0] = ata_dev_try_classify(ap, 0, &err);
classes[0] = ata_dev_try_classify(&link->device[0],
devmask & (1 << 0), &err);
if (slave_possible && err != 0x81)
classes[1] = ata_dev_try_classify(ap, 1, &err);
classes[1] = ata_dev_try_classify(&link->device[1],
devmask & (1 << 1), &err);
out:
DPRINTK("EXIT, classes[0]=%u [1]=%u\n", classes[0], classes[1]);
@ -3600,7 +3602,7 @@ int sata_std_hardreset(struct ata_link *link, unsigned int *class,
ap->ops->dev_select(ap, 0); /* probably unnecessary */
*class = ata_dev_try_classify(ap, 0, NULL);
*class = ata_dev_try_classify(link->device, 1, NULL);
DPRINTK("EXIT, class=%u\n", *class);
return 0;

6
drivers/ata/pata_scc.c
View File

@ -636,9 +636,11 @@ static int scc_std_softreset (struct ata_port *ap, unsigned int *classes,
}
/* determine by signature whether we have ATA or ATAPI devices */
classes[0] = ata_dev_try_classify(ap, 0, &err);
classes[0] = ata_dev_try_classify(&ap->link.device[0],
devmask & (1 << 0), &err);
if (slave_possible && err != 0x81)
classes[1] = ata_dev_try_classify(ap, 1, &err);
classes[1] = ata_dev_try_classify(&ap->link.device[1],
devmask & (1 << 1), &err);
out:
DPRINTK("EXIT, classes[0]=%u [1]=%u\n", classes[0], classes[1]);

2
drivers/ata/sata_mv.c
View File

@ -2248,7 +2248,7 @@ comreset_retry:
*/
/* finally, read device signature from TF registers */
*class = ata_dev_try_classify(ap, 0, NULL);
*class = ata_dev_try_classify(ap->link.device, 1, NULL);
writelfl(0, port_mmio + EDMA_ERR_IRQ_CAUSE_OFS);

3
include/linux/libata.h
View File

@ -781,7 +781,8 @@ extern void ata_port_queue_task(struct ata_port *ap, work_func_t fn,
extern u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val,
unsigned long interval_msec,
unsigned long timeout_msec);
extern unsigned int ata_dev_try_classify(struct ata_port *, unsigned int, u8 *);
extern unsigned int ata_dev_try_classify(struct ata_device *dev, int present,
u8 *r_err);
/*
* Default driver ops implementations