svn commit: r336734 - head/sys/dev/cxgbe

[Navdeep Parhar]

Author: np
Date: Thu Jul 26 06:42:09 2018
New Revision: 336734
URL: https://svnweb.freebsd.org/changeset/base/336734

Log:
  cxgbe(4): Better defaults for all cl-rl rate limiters.
  
  Start in "class" instead of "flow" mode.  This eliminates the need to
  specify an MTU, which is not available that early anyway.  It also
  allows the user to manually configure ch-rl rate limiting after attach.
  This used to fail because ch-rl isn't supported if cl-rl "flow" mode is
  configured.
  
  Set all traffic classes to 1Gbps during initialization.  The goal is to
  start off with _any_ valid configuration and 1Gbps works even for
  gigabit cards.
  
  Sponsored by:	Chelsio Communications

Modified:
  head/sys/dev/cxgbe/t4_sched.c

Modified: head/sys/dev/cxgbe/t4_sched.c
==============================================================================
--- head/sys/dev/cxgbe/t4_sched.c	Thu Jul 26 05:08:58 2018	(r336733)
+++ head/sys/dev/cxgbe/t4_sched.c	Thu Jul 26 06:42:09 2018	(r336734)
@@ -356,24 +356,6 @@ t4_init_tx_sched(struct adapter *sc)
 	const int n = sc->chip_params->nsched_cls;
 	struct port_info *pi;
 	struct tx_cl_rl_params *tc;
-	static const uint32_t init_kbps[] = {
-		100 * 1000,
-		200 * 1000,
-		400 * 1000,
-		500 * 1000,
-		800 * 1000,
-		1000 * 1000,
-		1200 * 1000,
-		1500 * 1000,
-		1800 * 1000,
-		2000 * 1000,
-		2500 * 1000,
-		3000 * 1000,
-		3500 * 1000,
-		4000 * 1000,
-		5000 * 1000,
-		10000 * 1000
-	};
 
 	mtx_init(&sc->tc_lock, "tx_sched lock", NULL, MTX_DEF);
 	TASK_INIT(&sc->tc_task, 0, update_tx_sched, sc);
@@ -386,9 +368,8 @@ t4_init_tx_sched(struct adapter *sc)
 			tc->refcount = 0;
 			tc->ratemode = FW_SCHED_PARAMS_RATE_ABS;
 			tc->rateunit = FW_SCHED_PARAMS_UNIT_BITRATE;
-			tc->mode = FW_SCHED_PARAMS_MODE_FLOW;
-			tc->maxrate = init_kbps[min(j, nitems(init_kbps) - 1)];
-			tc->pktsize = ETHERMTU;	/* XXX */
+			tc->mode = FW_SCHED_PARAMS_MODE_CLASS;
+			tc->maxrate = 1000 * 1000;	/* 1 Gbps.  Arbitrary */
 
 			if (t4_sched_params_cl_rl_kbps(sc, pi->tx_chan, j,
 			    tc->mode, tc->maxrate, tc->pktsize, 1) == 0)