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Fix:

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- Missing cpu_to_scr() added (endian-ness).

Improvement (fix|workaroung??):
- Blindly firing a PPR can lead to some messy situations due to
  various causes or misfeatures, for example:
  * The 53C1010-[33|66] supports offset 62 in DT mode, but only
    offset 31 in ST mode. As a result, a PPR(DT, offset 62)
    responded with PPR(ST, any offset > 31) must be rejected.
  * A device that doesn't know about PPR should reject it, but
    may also be confused by this message.
  When a PPR encounters problems, the driver now patches the goal
  transfer settings for legacy negotiations to be performed later
  with the offending target. This give a chance for bad situations
  to be fixed automagically.
This commit is contained in:
Gerard Roudier 2001-02-11 15:38:06 +00:00
parent fc19bba6aa
commit b1bec479be
1 changed files with 32 additions and 10 deletions
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42
sys/dev/sym/sym_hipd.c
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@ -5222,7 +5222,7 @@ static void sym_sir_task_recovery(hcb_p np, int num)
target = (INB (nc_sdid) & 0xf);
tp = &np->target[target];
np->abrt_tbl.addr = vtobus(np->abrt_msg);
np->abrt_tbl.addr = cpu_to_scr(vtobus(np->abrt_msg));
/*
* If the target is to be reset, prepare a
@ -5892,6 +5892,15 @@ static void sym_ppr_nego(hcb_p np, tcb_p tp, ccb_p cp)
sym_print_msg(cp, "ppr msgin", np->msgin);
};
/*
* get requested values.
*/
chg = 0;
per = np->msgin[3];
ofs = np->msgin[5];
wide = np->msgin[6];
dt = np->msgin[7] & PPR_OPT_DT;
/*
* request or answer ?
*/
@ -5902,15 +5911,6 @@ static void sym_ppr_nego(hcb_p np, tcb_p tp, ccb_p cp)
req = 0;
}
/*
* get requested values.
*/
chg = 0;
per = np->msgin[3];
ofs = np->msgin[5];
wide = np->msgin[6];
dt = np->msgin[7] & PPR_OPT_DT;
/*
* check values against our limits.
*/
@ -6004,6 +6004,17 @@ static void sym_ppr_nego(hcb_p np, tcb_p tp, ccb_p cp)
reject_it:
sym_setpprot (np, cp, 0, 0, 0, 0, 0, 0);
OUTL_DSP (SCRIPTB_BA (np, msg_bad));
/*
* If it was a device response that should result in
* ST, we may want to try a legacy negotiation later.
*/
if (!req && !dt) {
tp->tinfo.goal.options = 0;
tp->tinfo.goal.width = wide;
tp->tinfo.goal.period = per;
tp->tinfo.goal.offset = ofs;
}
return;
}
/*
@ -6116,6 +6127,9 @@ static void sym_wide_nego(hcb_p np, tcb_p tp, ccb_p cp)
*
* Called when a negotiation does not succeed either
* on rejection or on protocol error.
*
* If it was a PPR that made problems, we may want to
* try a legacy negotiation later.
*/
static void sym_nego_default(hcb_p np, tcb_p tp, ccb_p cp)
{
@ -6125,7 +6139,15 @@ static void sym_nego_default(hcb_p np, tcb_p tp, ccb_p cp)
*/
switch (cp->nego_status) {
case NS_PPR:
#if 0
sym_setpprot (np, cp, 0, 0, 0, 0, 0, 0);
#else
tp->tinfo.goal.options = 0;
if (tp->tinfo.goal.period < np->minsync)
tp->tinfo.goal.period = np->minsync;
if (tp->tinfo.goal.offset > np->maxoffs)
tp->tinfo.goal.offset = np->maxoffs;
#endif
break;
case NS_SYNC:
sym_setsync (np, cp, 0, 0, 0, 0);