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cxgbe(4): Add two new debug flags -- one to allow manual firmware

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install after full initialization, and another to disable the TCB
cache (T6+).  The latter works as a tunable only.

Note that debug_flags are for debugging only and should not be set
normally.

MFC after:	1 week
Sponsored by:	Chelsio Communications
This commit is contained in:
np 2017-08-30 23:41:04 +00:00
parent 452dc08dca
commit 214d5a91e8
3 changed files with 21 additions and 2 deletions
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4
sys/dev/cxgbe/adapter.h
View File

@ -172,7 +172,9 @@ enum {
INTR_ALL = (INTR_RXQ | INTR_OFLD_RXQ),
/* adapter debug_flags */
DF_DUMP_MBOX = (1 << 0),
DF_DUMP_MBOX = (1 << 0), /* Log all mbox cmd/rpl. */
DF_LOAD_FW_ANYTIME = (1 << 1), /* Allow LOAD_FW after init */
DF_DISABLE_TCB_CACHE = (1 << 2), /* Disable TCB cache (T6+) */
};
#define IS_DOOMED(vi) ((vi)->flags & DOOMED)

9
sys/dev/cxgbe/t4_main.c
View File

@ -9049,7 +9049,14 @@ load_fw(struct adapter *sc, struct t4_data *fw)
if (rc)
return (rc);
if (sc->flags & FULL_INIT_DONE) {
/*
* The firmware, with the sole exception of the memory parity error
* handler, runs from memory and not flash. It is almost always safe to
* install a new firmware on a running system. Just set bit 1 in
* hw.cxgbe.dflags or dev.<nexus>.<n>.dflags first.
*/
if (sc->flags & FULL_INIT_DONE &&
(sc->debug_flags & DF_LOAD_FW_ANYTIME) == 0) {
rc = EBUSY;
goto done;
}

10
sys/dev/cxgbe/t4_sge.c
View File

@ -615,6 +615,16 @@ t4_tweak_chip_settings(struct adapter *sc)
else
v = V_TSCALE(tscale - 2);
t4_set_reg_field(sc, A_SGE_ITP_CONTROL, m, v);
if (sc->debug_flags & DF_DISABLE_TCB_CACHE) {
m = V_RDTHRESHOLD(M_RDTHRESHOLD) | F_WRTHRTHRESHEN |
V_WRTHRTHRESH(M_WRTHRTHRESH);
t4_tp_pio_read(sc, &v, 1, A_TP_CMM_CONFIG, 1);
v &= ~m;
v |= V_RDTHRESHOLD(1) | F_WRTHRTHRESHEN |
V_WRTHRTHRESH(16);
t4_tp_pio_write(sc, &v, 1, A_TP_CMM_CONFIG, 1);
}
}
/* 4K, 16K, 64K, 256K DDP "page sizes" for TDDP */