Author: np
Date: Thu Feb 6 03:21:43 2014
New Revision: 261536
URL: http://svnweb.freebsd.org/changeset/base/261536
Log:
cxgbe(4): The T5 allows for a different freelist starvation threshold
for queues with buffer packing. Use the correct value to calculate a
freelist's low water mark.
MFC after: 1 week
Modified:
head/sys/dev/cxgbe/adapter.h
head/sys/dev/cxgbe/t4_sge.c
Modified: head/sys/dev/cxgbe/adapter.h
==============================================================================
--- head/sys/dev/cxgbe/adapter.h Thu Feb 6 02:54:04 2014
(r261535)
+++ head/sys/dev/cxgbe/adapter.h Thu Feb 6 03:21:43 2014
(r261536)
@@ -517,6 +517,7 @@ struct sge {
int timer_val[SGE_NTIMERS];
int counter_val[SGE_NCOUNTERS];
int fl_starve_threshold;
+ int fl_starve_threshold2;
int eq_s_qpp;
int iq_s_qpp;
Modified: head/sys/dev/cxgbe/t4_sge.c
==============================================================================
--- head/sys/dev/cxgbe/t4_sge.c Thu Feb 6 02:54:04 2014 (r261535)
+++ head/sys/dev/cxgbe/t4_sge.c Thu Feb 6 03:21:43 2014 (r261536)
@@ -569,6 +569,10 @@ t4_read_chip_settings(struct adapter *sc
r = t4_read_reg(sc, A_SGE_CONM_CTRL);
s->fl_starve_threshold = G_EGRTHRESHOLD(r) * 2 + 1;
+ if (is_t4(sc))
+ s->fl_starve_threshold2 = s->fl_starve_threshold;
+ else
+ s->fl_starve_threshold2 = G_EGRTHRESHOLDPACKING(r) * 2 + 1;
/* egress queues: log2 of # of doorbells per BAR2 page */
r = t4_read_reg(sc, A_SGE_EGRESS_QUEUES_PER_PAGE_PF);
@@ -2233,7 +2237,9 @@ alloc_iq_fl(struct port_info *pi, struct
return (rc);
}
fl->needed = fl->cap;
- fl->lowat = roundup2(sc->sge.fl_starve_threshold, 8);
+ fl->lowat = fl->flags & FL_BUF_PACKING ?
+ roundup2(sc->sge.fl_starve_threshold2, 8) :
+ roundup2(sc->sge.fl_starve_threshold, 8);
c.iqns_to_fl0congen |=
htobe32(V_FW_IQ_CMD_FL0HOSTFCMODE(X_HOSTFCMODE_NONE) |
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