From: Hariprasad Shenai <hariprasad@chelsio.com>
Date: Thu, 23 Jul 2015 17:11:14 +0000 (+0530)
Subject: cxgb4vf: Read correct FL congestion threshold for T5 and T6
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=ea6f82fe37319675e271dd6b55fb37731eef0e46;p=linux-beck.git

cxgb4vf: Read correct FL congestion threshold for T5 and T6

VF driver was reading incorrect freelist congestion notification threshold
for FLM queues when packing is enabled for T5 and T6 adapter. Fixing it
now.

Signed-off-by: Hariprasad Shenai <hariprasad@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/drivers/net/ethernet/chelsio/cxgb4/t4_regs.h b/drivers/net/ethernet/chelsio/cxgb4/t4_regs.h
index 375a825573b0..ed8a8f350113 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/t4_regs.h
+++ b/drivers/net/ethernet/chelsio/cxgb4/t4_regs.h
@@ -338,6 +338,11 @@
 #define EGRTHRESHOLDPACKING_G(x) \
 	(((x) >> EGRTHRESHOLDPACKING_S) & EGRTHRESHOLDPACKING_M)
 
+#define T6_EGRTHRESHOLDPACKING_S    16
+#define T6_EGRTHRESHOLDPACKING_M    0xffU
+#define T6_EGRTHRESHOLDPACKING_G(x) \
+	(((x) >> T6_EGRTHRESHOLDPACKING_S) & T6_EGRTHRESHOLDPACKING_M)
+
 #define SGE_TIMESTAMP_LO_A 0x1098
 #define SGE_TIMESTAMP_HI_A 0x109c
 
diff --git a/drivers/net/ethernet/chelsio/cxgb4vf/sge.c b/drivers/net/ethernet/chelsio/cxgb4vf/sge.c
index 1d5e77a566e1..fa3786a9d30e 100644
--- a/drivers/net/ethernet/chelsio/cxgb4vf/sge.c
+++ b/drivers/net/ethernet/chelsio/cxgb4vf/sge.c
@@ -2668,8 +2668,22 @@ int t4vf_sge_init(struct adapter *adapter)
 	 * give it more Free List entries.  (Note that the SGE's Egress
 	 * Congestion Threshold is in units of 2 Free List pointers.)
 	 */
-	s->fl_starve_thres
-		= EGRTHRESHOLD_G(sge_params->sge_congestion_control)*2 + 1;
+	switch (CHELSIO_CHIP_VERSION(adapter->params.chip)) {
+	case CHELSIO_T4:
+		s->fl_starve_thres =
+		   EGRTHRESHOLD_G(sge_params->sge_congestion_control);
+		break;
+	case CHELSIO_T5:
+		s->fl_starve_thres =
+		   EGRTHRESHOLDPACKING_G(sge_params->sge_congestion_control);
+		break;
+	case CHELSIO_T6:
+	default:
+		s->fl_starve_thres =
+		   T6_EGRTHRESHOLDPACKING_G(sge_params->sge_congestion_control);
+		break;
+	}
+	s->fl_starve_thres = s->fl_starve_thres * 2 + 1;
 
 	/*
 	 * Set up tasklet timers.