From: Michael Chan <mchan@broadcom.com>
Date: Sun, 4 Mar 2012 14:48:13 +0000 (+0000)
Subject: tg3: Fix jumbo loopback test on 5719
X-Git-Tag: v2.6.39-400.9.0~338^2~157
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=1fc6dcbff0ea5f25352d3890e63f618068813263;p=users%2Fjedix%2Flinux-maple.git

tg3: Fix jumbo loopback test on 5719

Loopback on 9K packet fails because the chip has a DMA limit of 4K.  The
loopback test logic uses a single BD for simplicity.  Fix it by reducing
the jumbo packet size to the DMA limit.

(cherry picked from commit c441b456767357322dbc14b55bdc7da0051d0d98)
Signed-off-by: Michael Chan <mchan@broadcom.com>
Reviewed-by: Benjamin Li <benli@broadcom.com>
Reviewed-by: Matt Carlson <mcarlson@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Joe Jin <joe.jin@oracle.com>
---

diff --git a/drivers/net/tg3.c b/drivers/net/tg3.c
index 44d335c92130..683198897476 100644
--- a/drivers/net/tg3.c
+++ b/drivers/net/tg3.c
@@ -11736,6 +11736,10 @@ static int tg3_run_loopback(struct tg3 *tp, u32 pktsz, bool tso_loopback)
 	} else {
 		num_pkts = 1;
 		data_off = ETH_HLEN;
+
+		if (tg3_flag(tp, USE_JUMBO_BDFLAG) &&
+		    tx_len > VLAN_ETH_FRAME_LEN)
+			base_flags |= TXD_FLAG_JMB_PKT;
 	}
 
 	for (i = data_off; i < tx_len; i++)
@@ -11865,6 +11869,10 @@ static int tg3_test_loopback(struct tg3 *tp, u64 *data, bool do_extlpbk)
 {
 	int err = -EIO;
 	u32 eee_cap;
+	u32 jmb_pkt_sz = 9000;
+
+	if (tp->dma_limit)
+		jmb_pkt_sz = tp->dma_limit - ETH_HLEN;
 
 	eee_cap = tp->phy_flags & TG3_PHYFLG_EEE_CAP;
 	tp->phy_flags &= ~TG3_PHYFLG_EEE_CAP;
@@ -11908,7 +11916,7 @@ static int tg3_test_loopback(struct tg3 *tp, u64 *data, bool do_extlpbk)
 			data[0] |= TG3_STD_LOOPBACK_FAILED;
 
 		if (tg3_flag(tp, JUMBO_RING_ENABLE) &&
-		    tg3_run_loopback(tp, 9000 + ETH_HLEN, false))
+		    tg3_run_loopback(tp, jmb_pkt_sz + ETH_HLEN, false))
 			data[0] |= TG3_JMB_LOOPBACK_FAILED;
 
 		tg3_mac_loopback(tp, false);
@@ -11933,7 +11941,7 @@ static int tg3_test_loopback(struct tg3 *tp, u64 *data, bool do_extlpbk)
 		    tg3_run_loopback(tp, ETH_FRAME_LEN, true))
 			data[1] |= TG3_TSO_LOOPBACK_FAILED;
 		if (tg3_flag(tp, JUMBO_RING_ENABLE) &&
-		    tg3_run_loopback(tp, 9000 + ETH_HLEN, false))
+		    tg3_run_loopback(tp, jmb_pkt_sz + ETH_HLEN, false))
 			data[1] |= TG3_JMB_LOOPBACK_FAILED;
 
 		if (do_extlpbk) {
@@ -11951,7 +11959,7 @@ static int tg3_test_loopback(struct tg3 *tp, u64 *data, bool do_extlpbk)
 			    tg3_run_loopback(tp, ETH_FRAME_LEN, true))
 				data[2] |= TG3_TSO_LOOPBACK_FAILED;
 			if (tg3_flag(tp, JUMBO_RING_ENABLE) &&
-			    tg3_run_loopback(tp, 9000 + ETH_HLEN, false))
+			    tg3_run_loopback(tp, jmb_pkt_sz + ETH_HLEN, false))
 				data[2] |= TG3_JMB_LOOPBACK_FAILED;
 		}