From 986e0aeb9ae09127b401c3baa66f15b7a31f354c Mon Sep 17 00:00:00 2001 From: Michael Chan Date: Sat, 5 May 2007 12:10:20 -0700 Subject: [PATCH] [TG3]: Remove reset during MAC address changes. The reset was added a while back so that ASF could re-init whatever MAC address it wanted to use after the MAC address was changed. Instead of resetting, we can just keep MAC address 1 unchanged during MAC address changes if MAC address 1 is different from MAC address 0. This fixes 2 problems: 1. Bonding calls set_mac_address in contexts that cannot sleep. It no longer sleeps with the chip reset removed. 2. When ASF shares the same MAC address as the NIC, it needs to always do that even when the MAC address is changed. Signed-off-by: Michael Chan Signed-off-by: David S. Miller --- drivers/net/tg3.c | 35 ++++++++++++++++++----------------- 1 file changed, 18 insertions(+), 17 deletions(-) diff --git a/drivers/net/tg3.c b/drivers/net/tg3.c index e829262ded43..321121874c77 100644 --- a/drivers/net/tg3.c +++ b/drivers/net/tg3.c @@ -5934,7 +5934,7 @@ static int tg3_load_tso_firmware(struct tg3 *tp) /* tp->lock is held. */ -static void __tg3_set_mac_addr(struct tg3 *tp) +static void __tg3_set_mac_addr(struct tg3 *tp, int skip_mac_1) { u32 addr_high, addr_low; int i; @@ -5946,6 +5946,8 @@ static void __tg3_set_mac_addr(struct tg3 *tp) (tp->dev->dev_addr[4] << 8) | (tp->dev->dev_addr[5] << 0)); for (i = 0; i < 4; i++) { + if (i == 1 && skip_mac_1) + continue; tw32(MAC_ADDR_0_HIGH + (i * 8), addr_high); tw32(MAC_ADDR_0_LOW + (i * 8), addr_low); } @@ -5972,7 +5974,7 @@ static int tg3_set_mac_addr(struct net_device *dev, void *p) { struct tg3 *tp = netdev_priv(dev); struct sockaddr *addr = p; - int err = 0; + int err = 0, skip_mac_1 = 0; if (!is_valid_ether_addr(addr->sa_data)) return -EINVAL; @@ -5983,22 +5985,21 @@ static int tg3_set_mac_addr(struct net_device *dev, void *p) return 0; if (tp->tg3_flags & TG3_FLAG_ENABLE_ASF) { - /* Reset chip so that ASF can re-init any MAC addresses it - * needs. - */ - tg3_netif_stop(tp); - tg3_full_lock(tp, 1); + u32 addr0_high, addr0_low, addr1_high, addr1_low; - tg3_halt(tp, RESET_KIND_SHUTDOWN, 1); - err = tg3_restart_hw(tp, 0); - if (!err) - tg3_netif_start(tp); - tg3_full_unlock(tp); - } else { - spin_lock_bh(&tp->lock); - __tg3_set_mac_addr(tp); - spin_unlock_bh(&tp->lock); + addr0_high = tr32(MAC_ADDR_0_HIGH); + addr0_low = tr32(MAC_ADDR_0_LOW); + addr1_high = tr32(MAC_ADDR_1_HIGH); + addr1_low = tr32(MAC_ADDR_1_LOW); + + /* Skip MAC addr 1 if ASF is using it. */ + if ((addr0_high != addr1_high || addr0_low != addr1_low) && + !(addr1_high == 0 && addr1_low == 0)) + skip_mac_1 = 1; } + spin_lock_bh(&tp->lock); + __tg3_set_mac_addr(tp, skip_mac_1); + spin_unlock_bh(&tp->lock); return err; } @@ -6315,7 +6316,7 @@ static int tg3_reset_hw(struct tg3 *tp, int reset_phy) tp->rx_jumbo_ptr); /* Initialize MAC address and backoff seed. */ - __tg3_set_mac_addr(tp); + __tg3_set_mac_addr(tp, 0); /* MTU + ethernet header + FCS + optional VLAN tag */ tw32(MAC_RX_MTU_SIZE, tp->dev->mtu + ETH_HLEN + 8); -- 2.20.1