[rdc] fix r6040 multicast patch, thanks

nicolas le falher

SVN-Revision: 27876

diff --git a/target/linux/rdc/patches-2.6.32/015-r6040_fix_multicast.patch b/target/linux/rdc/patches-2.6.32/015-r6040_fix_multicast.patch
index a55ec192f9172d258102431a6bed8c8d13e90fc7..f2236655bfc1865e2b028edacce28c38a7d6d4de 100644 (file)
--- a/target/linux/rdc/patches-2.6.32/015-r6040_fix_multicast.patch
+++ b/target/linux/rdc/patches-2.6.32/015-r6040_fix_multicast.patch
@@ -1,33 +1,3 @@
-The original code does not work well when the number of mulitcast
-address to handle is greater than MCAST_MAX. It only enable promiscous
-mode instead of multicast hash table mode, so the hash table function
-will not be activated and all multicast frames will be recieved in this
-condition.
-
-This patch fixes the following issues with the r6040 NIC operating in
-multicast:
-
-1) When the IFF_ALLMULTI flag is set, we should write 0xffff to the NIC
-hash table registers to make it process multicast traffic.
-
-2) When the number of multicast address to handle is smaller than
-MCAST_MAX, we should use the NIC multicast registers MID1_{L,M,H}.
-
-3) The hashing of the address was not correct, due to an invalid
-substraction (15 - (crc & 0x0f)) instead of (crc & 0x0f) and an
-incorrect crc algorithm (ether_crc_le) instead of (ether_crc).
-
-4) If necessary, we should set HASH_EN flag in MCR0 to enable multicast
-hash table function.
-
-
-The version is for net-next-2.6:
-
-Reported-by: Marc Leclerc <marc-leclerc@signaturealpha.com>
-Tested-by: Marc Leclerc <marc-leclerc@signaturealpha.com>
-Signed-off-by: Shawn Lin <shawn@dmp.com.tw>
-Signed-off-by: Albert Chen <albert.chen@rdc.com.tw>
----
 --- a/drivers/net/r6040.c
 +++ b/drivers/net/r6040.c
 @@ -70,6 +70,8 @@
@@ -39,7 +9,7 @@ Signed-off-by: Albert Chen <albert.chen@rdc.com.tw>
  #define MCR1          0x04    /* Control register 1 */
  #define  MAC_RST      0x0001  /* Reset the MAC */
  #define MBCR          0x08    /* Bus control */
-@@ -837,76 +839,88 @@ static void r6040_multicast_list(struct
+@@ -837,76 +839,96 @@
  {
        struct r6040_private *lp = netdev_priv(dev);
        void __iomem *ioaddr = lp->base;
@@ -48,17 +18,21 @@ Signed-off-by: Albert Chen <albert.chen@rdc.com.tw>
        unsigned long flags;
        struct dev_mc_list *dmi = dev->mc_list;
        int i;
++      u16 *adrp;
 +      u16 hash_table[4] = { 0 };
++
++      spin_lock_irqsave(&lp->lock, flags);
  
 -      /* MAC Address */
--      adrp = (u16 *)dev->dev_addr;
--      iowrite16(adrp[0], ioaddr + MID_0L);
--      iowrite16(adrp[1], ioaddr + MID_0M);
--      iowrite16(adrp[2], ioaddr + MID_0H);
--
--      /* Promiscous Mode */
-       spin_lock_irqsave(&lp->lock, flags);
++      /* Keep our MAC Address */
+       adrp = (u16 *)dev->dev_addr;
+       iowrite16(adrp[0], ioaddr + MID_0L);
+       iowrite16(adrp[1], ioaddr + MID_0M);
+       iowrite16(adrp[2], ioaddr + MID_0H);
  
+-      /* Promiscous Mode */
+-      spin_lock_irqsave(&lp->lock, flags);
+-
        /* Clear AMCP & PROM bits */
 -      reg = ioread16(ioaddr) & ~0x0120;
 +      lp->mcr0 = ioread16(ioaddr + MCR0) & ~(PROMISC | HASH_EN);
@@ -123,29 +97,29 @@ Signed-off-by: Albert Chen <albert.chen@rdc.com.tw>
 +      /* Otherwise, Enable multicast hash table function. */
 +      else {
 +              u32 crc;
++
++              lp->mcr0 |= HASH_EN;
  
 -                      if (!(*addrs & 1))
 -                              continue;
-+              lp->mcr0 |= HASH_EN;
- 
--                      crc = ether_crc_le(6, addrs);
--                      crc >>= 26;
--                      hash_table[crc >> 4] |= 1 << (15 - (crc & 0xf));
 +              for (i = 0; i < MCAST_MAX ; i++) {
 +                      iowrite16(0, ioaddr + MID_1L + 8 * i);
 +                      iowrite16(0, ioaddr + MID_1M + 8 * i);
 +                      iowrite16(0, ioaddr + MID_1H + 8 * i);
-               }
--              /* Fill the MAC hash tables with their values */
++              }
 +
 +              /* Build multicast hash table */
 +              for (i = 0; i < dev->mc_count; i++) {
 +                      u8 *addrs = dmi->dmi_addr;
 +                      dmi = dmi->next;
-+
+ 
+-                      crc = ether_crc_le(6, addrs);
 +                      crc = ether_crc(ETH_ALEN, addrs);
+                       crc >>= 26;
+-                      hash_table[crc >> 4] |= 1 << (15 - (crc & 0xf));
 +                      hash_table[crc >> 4] |= 1 << (crc & 0xf);
-+              }
+               }
+-              /* Fill the MAC hash tables with their values */
 +      }
 +      iowrite16(lp->mcr0, ioaddr + MCR0);
 +