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authorMatthew Wilcox <matthew@wil.cx>2005-11-29 23:08:44 -0500
committerJames Bottomley <jejb@mulgrave.(none)>2005-12-13 18:11:45 -0700
commitb37df48923b76155de2a728e1155ed263dba5f53 (patch)
treed66ce7b56be9df12a7c64521e931dc4925bf800f /drivers/scsi/sym53c8xx_2/sym_nvram.c
parent33333bacf523bb4bb903058fec6041a5952c93c6 (diff)
[SCSI] sym2: Allow NVRAM settings to limit speed and width
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>
Diffstat (limited to 'drivers/scsi/sym53c8xx_2/sym_nvram.c')
-rw-r--r--drivers/scsi/sym53c8xx_2/sym_nvram.c29
1 files changed, 16 insertions, 13 deletions
diff --git a/drivers/scsi/sym53c8xx_2/sym_nvram.c b/drivers/scsi/sym53c8xx_2/sym_nvram.c
index 994b7566bcac..15d69298ab6e 100644
--- a/drivers/scsi/sym53c8xx_2/sym_nvram.c
+++ b/drivers/scsi/sym53c8xx_2/sym_nvram.c
@@ -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;