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[SCSI] sym2: Allow NVRAM settings to limit speed and width

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The NVRAM for both Tekram and Symbios boards allows the user to set the
speed and width for individual targets.  I took that code out in March
2004 when we introduced Domain Validation, but it seems there's still
a legitimate need for it in some configurations.

Signed-off-by: Matthew Wilcox <matthew@wil.cx>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
This commit is contained in:
Matthew Wilcox 2005-11-29 23:08:44 -05:00 committed by James Bottomley
parent 33333bacf5
commit b37df48923
5 changed files with 26 additions and 18 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/scsi/sym53c8xx_2/sym_glue.c
View File

@ -1038,6 +1038,9 @@ static int sym53c8xx_slave_alloc(struct scsi_device *sdev)
return -ENOMEM;
tp->starget = sdev->sdev_target;
spi_min_period(tp->starget) = tp->usr_period;
spi_max_width(tp->starget) = tp->usr_width;
return 0;
}

2
drivers/scsi/sym53c8xx_2/sym_hipd.c
View File

@ -943,7 +943,7 @@ static int sym_prepare_setting(struct Scsi_Host *shost, struct sym_hcb *np, stru
tp->usrflags |= (SYM_DISC_ENABLED | SYM_TAGS_ENABLED);
tp->usrtags = SYM_SETUP_MAX_TAG;
sym_nvram_setup_target(np, i, nvram);
sym_nvram_setup_target(tp, i, nvram);
if (!tp->usrtags)
tp->usrflags &= ~SYM_TAGS_ENABLED;

6
drivers/scsi/sym53c8xx_2/sym_hipd.h
View File

@ -434,8 +434,10 @@ struct sym_tcb {
* Other user settable limits and options.
* These limits are read from the NVRAM if present.
*/
u_char usrflags;
u_short usrtags;
unsigned char usrflags;
unsigned char usr_period;
unsigned char usr_width;
unsigned short usrtags;
struct scsi_target *starget;
};

29
drivers/scsi/sym53c8xx_2/sym_nvram.c
View File

@ -92,29 +92,32 @@ void sym_nvram_setup_host(struct Scsi_Host *shost, struct sym_hcb *np, struct sy
* Get target set-up from Symbios format NVRAM.
*/
static void
sym_Symbios_setup_target(struct sym_hcb *np, int target, Symbios_nvram *nvram)
sym_Symbios_setup_target(struct sym_tcb *tp, int target, Symbios_nvram *nvram)
{
struct sym_tcb *tp = &np->target[target];
Symbios_target *tn = &nvram->target[target];
tp->usrtags =
(tn->flags & SYMBIOS_QUEUE_TAGS_ENABLED)? SYM_SETUP_MAX_TAG : 0;
if (!(tn->flags & SYMBIOS_QUEUE_TAGS_ENABLED))
tp->usrtags = 0;
if (!(tn->flags & SYMBIOS_DISCONNECT_ENABLE))
tp->usrflags &= ~SYM_DISC_ENABLED;
if (!(tn->flags & SYMBIOS_SCAN_AT_BOOT_TIME))
tp->usrflags |= SYM_SCAN_BOOT_DISABLED;
if (!(tn->flags & SYMBIOS_SCAN_LUNS))
tp->usrflags |= SYM_SCAN_LUNS_DISABLED;
tp->usr_period = (tn->sync_period + 3) / 4;
tp->usr_width = (tn->bus_width == 0x8) ? 0 : 1;
}
static const unsigned char Tekram_sync[16] = {
25, 31, 37, 43, 50, 62, 75, 125, 12, 15, 18, 21, 6, 7, 9, 10
};
/*
* Get target set-up from Tekram format NVRAM.
*/
static void
sym_Tekram_setup_target(struct sym_hcb *np, int target, Tekram_nvram *nvram)
sym_Tekram_setup_target(struct sym_tcb *tp, int target, Tekram_nvram *nvram)
{
struct sym_tcb *tp = &np->target[target];
struct Tekram_target *tn = &nvram->target[target];
if (tn->flags & TEKRAM_TAGGED_COMMANDS) {
@ -124,22 +127,22 @@ sym_Tekram_setup_target(struct sym_hcb *np, int target, Tekram_nvram *nvram)
if (tn->flags & TEKRAM_DISCONNECT_ENABLE)
tp->usrflags |= SYM_DISC_ENABLED;
/* If any device does not support parity, we will not use this option */
if (!(tn->flags & TEKRAM_PARITY_CHECK))
np->rv_scntl0 &= ~0x0a; /* SCSI parity checking disabled */
if (tn->flags & TEKRAM_SYNC_NEGO)
tp->usr_period = Tekram_sync[tn->sync_index & 0xf];
tp->usr_width = (tn->flags & TEKRAM_WIDE_NEGO) ? 1 : 0;
}
/*
* Get target setup from NVRAM.
*/
void sym_nvram_setup_target(struct sym_hcb *np, int target, struct sym_nvram *nvp)
void sym_nvram_setup_target(struct sym_tcb *tp, int target, struct sym_nvram *nvp)
{
switch (nvp->type) {
case SYM_SYMBIOS_NVRAM:
sym_Symbios_setup_target(np, target, &nvp->data.Symbios);
sym_Symbios_setup_target(tp, target, &nvp->data.Symbios);
break;
case SYM_TEKRAM_NVRAM:
sym_Tekram_setup_target(np, target, &nvp->data.Tekram);
sym_Tekram_setup_target(tp, target, &nvp->data.Tekram);
break;
default:
break;

4
drivers/scsi/sym53c8xx_2/sym_nvram.h
View File

@ -194,12 +194,12 @@ struct sym_nvram {
#if SYM_CONF_NVRAM_SUPPORT
void sym_nvram_setup_host(struct Scsi_Host *shost, struct sym_hcb *np, struct sym_nvram *nvram);
void sym_nvram_setup_target (struct sym_hcb *np, int target, struct sym_nvram *nvp);
void sym_nvram_setup_target (struct sym_tcb *tp, int target, struct sym_nvram *nvp);
int sym_read_nvram (struct sym_device *np, struct sym_nvram *nvp);
char *sym_nvram_type(struct sym_nvram *nvp);
#else
static inline void sym_nvram_setup_host(struct Scsi_Host *shost, struct sym_hcb *np, struct sym_nvram *nvram) { }
static inline void sym_nvram_setup_target(struct sym_hcb *np, struct sym_nvram *nvram) { }
static inline void sym_nvram_setup_target(struct sym_tcb *tp, struct sym_nvram *nvram) { }
static inline int sym_read_nvram(struct sym_device *np, struct sym_nvram *nvp)
{
nvp->type = 0;