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| author | Bruce Allan <bruce.w.allan@intel.com> | 2010-01-07 16:32:13 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-01-08 00:35:31 -0800 |
| commit | b7a9216c5a3205a6d721972bfd012c4eb5950e9c (patch) | |
| tree | 9a33ba2afe538d12c97bd87649a2026230dba756 | |
| parent | ca777f9c098f1ea1c9ec61318cc909d0c8f465e1 (diff) | |
| download | linux-b7a9216c5a3205a6d721972bfd012c4eb5950e9c.tar.gz | |
e1000e: fix and commonize code for setting the receive address registers
Fix e1000e_rar_set() to flush consecutive register writes to avoid write combining which some parts cannot handle. Update e1000e_init_rx_addrs() to call the fixed e1000e_rar_set() instead of duplicating code. Also change e1000e_rar_set() to _not_ set the Address Valid bit if the MAC address is all zeros. Signed-off-by: Bruce Allan <bruce.w.allan@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/e1000e/lib.c | 24 |
1 files changed, 15 insertions, 9 deletions
diff --git a/drivers/net/e1000e/lib.c b/drivers/net/e1000e/lib.c index 97649bf53b05..2fa9b36a2c5a 100644 --- a/drivers/net/e1000e/lib.c +++ b/drivers/net/e1000e/lib.c @@ -125,6 +125,7 @@ void e1000_write_vfta_generic(struct e1000_hw *hw, u32 offset, u32 value) void e1000e_init_rx_addrs(struct e1000_hw *hw, u16 rar_count) { u32 i; + u8 mac_addr[ETH_ALEN] = {0}; /* Setup the receive address */ e_dbg("Programming MAC Address into RAR[0]\n"); @@ -133,12 +134,8 @@ void e1000e_init_rx_addrs(struct e1000_hw *hw, u16 rar_count) /* Zero out the other (rar_entry_count - 1) receive addresses */ e_dbg("Clearing RAR[1-%u]\n", rar_count-1); - for (i = 1; i < rar_count; i++) { - E1000_WRITE_REG_ARRAY(hw, E1000_RA, (i << 1), 0); - e1e_flush(); - E1000_WRITE_REG_ARRAY(hw, E1000_RA, ((i << 1) + 1), 0); - e1e_flush(); - } + for (i = 1; i < rar_count; i++) + e1000e_rar_set(hw, mac_addr, i); } /** @@ -164,10 +161,19 @@ void e1000e_rar_set(struct e1000_hw *hw, u8 *addr, u32 index) rar_high = ((u32) addr[4] | ((u32) addr[5] << 8)); - rar_high |= E1000_RAH_AV; + /* If MAC address zero, no need to set the AV bit */ + if (rar_low || rar_high) + rar_high |= E1000_RAH_AV; - E1000_WRITE_REG_ARRAY(hw, E1000_RA, (index << 1), rar_low); - E1000_WRITE_REG_ARRAY(hw, E1000_RA, ((index << 1) + 1), rar_high); + /* + * Some bridges will combine consecutive 32-bit writes into + * a single burst write, which will malfunction on some parts. + * The flushes avoid this. + */ + ew32(RAL(index), rar_low); + e1e_flush(); + ew32(RAH(index), rar_high); + e1e_flush(); } /** |