[ipxe-devel] [PATCH 2/3] [tg3] Use BDINFO DMA flag for some cards

[Cody Cutler]

BCM5720 cannot receive any packets without this patch.  We must use a
maxlen smaller than what is used in Linux or we crash while receiving
large files.

Tested on BCM5720 and BCM5754
---
 src/drivers/net/tg3/tg3_hw.c |    9 ++++++++-
 1 files changed, 8 insertions(+), 1 deletions(-)

diff --git a/src/drivers/net/tg3/tg3_hw.c b/src/drivers/net/tg3/tg3_hw.c
index 4aa186a..7875dd4 100644
--- a/src/drivers/net/tg3/tg3_hw.c
+++ b/src/drivers/net/tg3/tg3_hw.c
@@ -2145,7 +2145,14 @@ static int tg3_reset_hw(struct tg3 *tp, int reset_phy)
 		tw32(RCVDBDI_MINI_BD + TG3_BDINFO_MAXLEN_FLAGS,
 		     BDINFO_FLAGS_DISABLED);
 
-	val = TG3_RX_STD_MAX_SIZE_5700 << BDINFO_FLAGS_MAXLEN_SHIFT;
+	if (tg3_flag(tp, 57765_PLUS)) {
+		/* 5717's size crashes - use smaller size */
+		//val = TG3_RX_STD_MAX_SIZE_5717;
+		val = TG3_RX_STD_MAX_SIZE_5700;
+		val <<= BDINFO_FLAGS_MAXLEN_SHIFT;
+		val |= (TG3_RX_STD_DMA_SZ << 2);
+	} else
+		val = TG3_RX_STD_MAX_SIZE_5700 << BDINFO_FLAGS_MAXLEN_SHIFT;
 
 	tw32(RCVDBDI_STD_BD + TG3_BDINFO_MAXLEN_FLAGS, val);
 
-- 
1.7.6