Author: np
Date: Wed Aug 30 23:41:04 2017
New Revision: 323041
URL: https://svnweb.freebsd.org/changeset/base/323041
Log:
cxgbe(4): Add two new debug flags -- one to allow manual firmware
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
Modified:
head/sys/dev/cxgbe/adapter.h
head/sys/dev/cxgbe/t4_main.c
head/sys/dev/cxgbe/t4_sge.c
Modified: head/sys/dev/cxgbe/adapter.h
==============================================================================
--- head/sys/dev/cxgbe/adapter.h Wed Aug 30 22:58:11 2017
(r323040)
+++ head/sys/dev/cxgbe/adapter.h Wed Aug 30 23:41:04 2017
(r323041)
@@ -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)
Modified: head/sys/dev/cxgbe/t4_main.c
==============================================================================
--- head/sys/dev/cxgbe/t4_main.c Wed Aug 30 22:58:11 2017
(r323040)
+++ head/sys/dev/cxgbe/t4_main.c Wed Aug 30 23:41:04 2017
(r323041)
@@ -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;
}
Modified: head/sys/dev/cxgbe/t4_sge.c
==============================================================================
--- head/sys/dev/cxgbe/t4_sge.c Wed Aug 30 22:58:11 2017 (r323040)
+++ head/sys/dev/cxgbe/t4_sge.c Wed Aug 30 23:41:04 2017 (r323041)
@@ -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 */
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