1. 14 1月, 2010 1 次提交
  2. 22 3月, 2009 1 次提交
    • L
      dsa: add switch chip cascading support · e84665c9
      Lennert Buytenhek 提交于
      The initial version of the DSA driver only supported a single switch
      chip per network interface, while DSA-capable switch chips can be
      interconnected to form a tree of switch chips.  This patch adds support
      for multiple switch chips on a network interface.
      
      An example topology for a 16-port device with an embedded CPU is as
      follows:
      
      	+-----+          +--------+       +--------+
      	|     |eth0    10| switch |9    10| switch |
      	| CPU +----------+        +-------+        |
      	|     |          | chip 0 |       | chip 1 |
      	+-----+          +---++---+       +---++---+
      	                     ||               ||
      	                     ||               ||
      	                     ||1000baseT      ||1000baseT
      	                     ||ports 1-8      ||ports 9-16
      
      This requires a couple of interdependent changes in the DSA layer:
      
      - The dsa platform driver data needs to be extended: there is still
        only one netdevice per DSA driver instance (eth0 in the example
        above), but each of the switch chips in the tree needs its own
        mii_bus device pointer, MII management bus address, and port name
        array. (include/net/dsa.h)  The existing in-tree dsa users need
        some small changes to deal with this. (arch/arm)
      
      - The DSA and Ethertype DSA tagging modules need to be extended to
        use the DSA device ID field on receive and demultiplex the packet
        accordingly, and fill in the DSA device ID field on transmit
        according to which switch chip the packet is heading to.
        (net/dsa/tag_{dsa,edsa}.c)
      
      - The concept of "CPU port", which is the switch chip port that the
        CPU is connected to (port 10 on switch chip 0 in the example), needs
        to be extended with the concept of "upstream port", which is the
        port on the switch chip that will bring us one hop closer to the CPU
        (port 10 for both switch chips in the example above).
      
      - The dsa platform data needs to specify which ports on which switch
        chips are links to other switch chips, so that we can enable DSA
        tagging mode on them.  (For inter-switch links, we always use
        non-EtherType DSA tagging, since it has lower overhead.  The CPU
        link uses dsa or edsa tagging depending on what the 'root' switch
        chip supports.)  This is done by specifying "dsa" for the given
        port in the port array.
      
      - The dsa platform data needs to be extended with information on via
        which port to reach any given switch chip from any given switch chip.
        This info is specified via the per-switch chip data struct ->rtable[]
        array, which gives the nexthop ports for each of the other switches
        in the tree.
      
      For the example topology above, the dsa platform data would look
      something like this:
      
      	static struct dsa_chip_data sw[2] = {
      		{
      			.mii_bus	= &foo,
      			.sw_addr	= 1,
      			.port_names[0]	= "p1",
      			.port_names[1]	= "p2",
      			.port_names[2]	= "p3",
      			.port_names[3]	= "p4",
      			.port_names[4]	= "p5",
      			.port_names[5]	= "p6",
      			.port_names[6]	= "p7",
      			.port_names[7]	= "p8",
      			.port_names[9]	= "dsa",
      			.port_names[10]	= "cpu",
      			.rtable		= (s8 []){ -1, 9, },
      		}, {
      			.mii_bus	= &foo,
      			.sw_addr	= 2,
      			.port_names[0]	= "p9",
      			.port_names[1]	= "p10",
      			.port_names[2]	= "p11",
      			.port_names[3]	= "p12",
      			.port_names[4]	= "p13",
      			.port_names[5]	= "p14",
      			.port_names[6]	= "p15",
      			.port_names[7]	= "p16",
      			.port_names[10]	= "dsa",
      			.rtable		= (s8 []){ 10, -1, },
      		},
      	},
      
      	static struct dsa_platform_data pd = {
      		.netdev		= &foo,
      		.nr_switches	= 2,
      		.sw		= sw,
      	};
      Signed-off-by: NLennert Buytenhek <buytenh@marvell.com>
      Tested-by: NGary Thomas <gary@mlbassoc.com>
      Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      e84665c9
  3. 20 10月, 2008 1 次提交
  4. 05 9月, 2008 1 次提交
    • L
      mv643xx_eth: remove force_phy_addr field · ac840605
      Lennert Buytenhek 提交于
      Currently, there are two different fields in the
      mv643xx_eth_platform_data struct that together describe the PHY
      address -- one field (phy_addr) has the address of the PHY, but if
      that address is zero, a second field (force_phy_addr) needs to be
      set to distinguish the actual address zero from a zero due to not
      having filled in the PHY address explicitly (which should mean
      'use the default PHY address').
      
      If we are a bit smarter about the encoding of the phy_addr field,
      we can avoid the need for a second field -- this patch does that.
      Signed-off-by: NLennert Buytenhek <buytenh@marvell.com>
      ac840605
  5. 07 8月, 2008 1 次提交
  6. 24 7月, 2008 1 次提交
    • L
      mv643xx_eth: use auto phy polling for configuring (R)(G)MII interface · 81600eea
      Lennert Buytenhek 提交于
      The mv643xx_eth hardware has a provision for polling the PHY's
      MII management registers to obtain the (R)(G)MII interface speed
      (10/100/1000) and duplex (half/full) and pause (off/symmetric)
      settings to use to talk to the PHY.
      
      The driver currently does not make use of this feature.  Instead,
      whenever there is a link status change event, it reads the current
      link parameters from the PHY, and programs those parameters into
      the mv643xx_eth MAC by hand.
      
      This patch switches the mv643xx_eth driver to letting the MAC
      auto-determine the (R)(G)MII link parameters by PHY polling, if there
      is a PHY present.  For PHYless ports (when e.g. the (R)(G)MII
      interface is connected to a hardware switch), we keep hardcoding the
      MII interface parameters.
      Signed-off-by: NLennert Buytenhek <buytenh@marvell.com>
      81600eea
  7. 23 6月, 2008 1 次提交