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[PATCH] libata: clean up debounce parameters and improve parameter selection

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The names of predefined debounce timing parameters didn't exactly
match their usages.  Rename to more generic names and implement param
selection helper sata_ehc_deb_timing() which uses EHI_HOTPLUGGED to
select params.

Combined with the previous EHI_RESUME_LINK differentiation, this makes
parameter selection accurate.  e.g. user scan resumes link but normal
deb param is used instead of hotplug param.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Tejun Heo 2006-07-03 16:07:26 +09:00 committed by Jeff Garzik
parent 2832430435
commit e9c839142d
3 changed files with 24 additions and 18 deletions
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25
drivers/scsi/libata-core.c
View File

@ -61,9 +61,9 @@
#include "libata.h"
/* debounce timing parameters in msecs { interval, duration, timeout } */
const unsigned long sata_deb_timing_boot[] = { 5, 100, 2000 };
const unsigned long sata_deb_timing_eh[] = { 25, 500, 2000 };
const unsigned long sata_deb_timing_before_fsrst[] = { 100, 2000, 5000 };
const unsigned long sata_deb_timing_normal[] = { 5, 100, 2000 };
const unsigned long sata_deb_timing_hotplug[] = { 25, 500, 2000 };
const unsigned long sata_deb_timing_long[] = { 100, 2000, 5000 };
static unsigned int ata_dev_init_params(struct ata_device *dev,
u16 heads, u16 sectors);
@ -2588,7 +2588,7 @@ static void ata_wait_spinup(struct ata_port *ap)
/* first, debounce phy if SATA */
if (ap->cbl == ATA_CBL_SATA) {
rc = sata_phy_debounce(ap, sata_deb_timing_eh);
rc = sata_phy_debounce(ap, sata_deb_timing_hotplug);
/* if debounced successfully and offline, no need to wait */
if ((rc == 0 || rc == -EOPNOTSUPP) && ata_port_offline(ap))
@ -2624,7 +2624,7 @@ static void ata_wait_spinup(struct ata_port *ap)
int ata_std_prereset(struct ata_port *ap)
{
struct ata_eh_context *ehc = &ap->eh_context;
const unsigned long *timing;
const unsigned long *timing = sata_ehc_deb_timing(ehc);
int rc;
/* handle link resume & hotplug spinup */
@ -2642,11 +2642,6 @@ int ata_std_prereset(struct ata_port *ap)
/* if SATA, resume phy */
if (ap->cbl == ATA_CBL_SATA) {
if (ap->pflags & ATA_PFLAG_LOADING)
timing = sata_deb_timing_boot;
else
timing = sata_deb_timing_eh;
rc = sata_phy_resume(ap, timing);
if (rc && rc != -EOPNOTSUPP) {
/* phy resume failed */
@ -2734,6 +2729,8 @@ int ata_std_softreset(struct ata_port *ap, unsigned int *classes)
*/
int sata_std_hardreset(struct ata_port *ap, unsigned int *class)
{
struct ata_eh_context *ehc = &ap->eh_context;
const unsigned long *timing = sata_ehc_deb_timing(ehc);
u32 scontrol;
int rc;
@ -2771,7 +2768,7 @@ int sata_std_hardreset(struct ata_port *ap, unsigned int *class)
msleep(1);
/* bring phy back */
sata_phy_resume(ap, sata_deb_timing_eh);
sata_phy_resume(ap, timing);
/* TODO: phy layer with polling, timeouts, etc. */
if (ata_port_offline(ap)) {
@ -5852,9 +5849,9 @@ u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val,
* Do not depend on ABI/API stability.
*/
EXPORT_SYMBOL_GPL(sata_deb_timing_boot);
EXPORT_SYMBOL_GPL(sata_deb_timing_eh);
EXPORT_SYMBOL_GPL(sata_deb_timing_before_fsrst);
EXPORT_SYMBOL_GPL(sata_deb_timing_normal);
EXPORT_SYMBOL_GPL(sata_deb_timing_hotplug);
EXPORT_SYMBOL_GPL(sata_deb_timing_long);
EXPORT_SYMBOL_GPL(ata_std_bios_param);
EXPORT_SYMBOL_GPL(ata_std_ports);
EXPORT_SYMBOL_GPL(ata_device_add);

2
drivers/scsi/sata_sil24.c
View File

@ -607,7 +607,7 @@ static int sil24_hardreset(struct ata_port *ap, unsigned int *class)
/* SStatus oscillates between zero and valid status after
* DEV_RST, debounce it.
*/
rc = sata_phy_debounce(ap, sata_deb_timing_before_fsrst);
rc = sata_phy_debounce(ap, sata_deb_timing_long);
if (rc) {
reason = "PHY debouncing failed";
goto err;

15
include/linux/libata.h
View File

@ -629,9 +629,18 @@ struct ata_timing {
#define FIT(v,vmin,vmax) max_t(short,min_t(short,v,vmax),vmin)
extern const unsigned long sata_deb_timing_boot[];
extern const unsigned long sata_deb_timing_eh[];
extern const unsigned long sata_deb_timing_before_fsrst[];
extern const unsigned long sata_deb_timing_normal[];
extern const unsigned long sata_deb_timing_hotplug[];
extern const unsigned long sata_deb_timing_long[];
static inline const unsigned long *
sata_ehc_deb_timing(struct ata_eh_context *ehc)
{
if (ehc->i.flags & ATA_EHI_HOTPLUGGED)
return sata_deb_timing_hotplug;
else
return sata_deb_timing_normal;
}
extern void ata_port_probe(struct ata_port *);
extern void __sata_phy_reset(struct ata_port *ap);