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  1. 12 3月, 2011 5 次提交
    • J
      ixgbe: DCB during ifup use correct CEE or IEEE mode · c27931da
      由 John Fastabend 提交于 
      DCB settings are cleared in the hardware across link events
during ifup ixgbe reprograms the hardware for DCB if it is
enabled. Now that we have two modes CEE or IEEE we need to
use the correct set of configuration data.

This patch checks the dcbx_cap bits and then enables the
device in the correct mode.
Signed-off-by: NJohn Fastabend <john.r.fastabend@intel.com>
Tested-by: NRoss Brattain <ross.b.brattain@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>
      c27931da
    • J
      ixgbe: DCB: enable RSS to be used with DCB · 8187cd48
      由 John Fastabend 提交于 
      RSS had previously been disabled when DCB was enabled because
DCB was single queued per traffic class. Now that DCB implements
multiple Tx/Rx rings per traffic class enable RSS.

Here RSS hashes across the queues in the traffic class.
Signed-off-by: NJohn Fastabend <john.r.fastabend@intel.com>
Tested-by: NRoss Brattain <ross.b.brattain.@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>
      8187cd48
    • J
      ixgbe: enable ndo_tc_setup · 24095aa3
      由 John Fastabend 提交于 
      This patch adds the ndo_tc_setup to ixgbe. By default we set
the device to use strict priority.
Signed-off-by: NJohn Fastabend <john.r.fastabend@intel.com>
Tested-by: NRoss Brattain <ross.b.brattain.@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>
      24095aa3
    • J
      ixgbe: DCB, use multiple Tx rings per traffic class · e5b64635
      由 John Fastabend 提交于 
      This enables multiple {Tx|Rx} rings per traffic class while in DCB
mode. In order to get this working as expected the tc_to_tx net
device mapping is configured as well as the prio_tc_map.

skb priorities are mapped across a range of queue pairs to get
a distribution per traffic class. The maximum number of
queue pairs used while in DCB mode is capped at 64. The hardware
max is actually 128 queues but 64 is sufficient for now and
allocating more seemed a bit excessive. It is easy enough to
increase the cap later if need be.

To get the 802.1Q priority tags inserted correctly ixgbe was
previously using the skb queue_mapping field to directly set
the 802.1Q priority. This no longer works because we have removed
the 1:1 mapping between queues and traffic class. Each ring
is aligned with an 802.1Qaz traffic class so here we add an
extra field to the ring struct to identify the 802.1Q traffic
class. This uses an extra byte of the ixgbe_ring struct
fortunately there was a 2byte hole,

struct ixgbe_ring {
        void *                     desc;                 /*     0     8 */
        struct device *            dev;                  /*     8     8 */
        struct net_device *        netdev;               /*    16     8 */
        union {
                struct ixgbe_tx_buffer * tx_buffer_info; /*           8 */
                struct ixgbe_rx_buffer * rx_buffer_info; /*           8 */
        };                                               /*    24     8 */
        long unsigned int          state;                /*    32     8 */
        u8                         atr_sample_rate;      /*    40     1 */
        u8                         atr_count;            /*    41     1 */
        u16                        count;                /*    42     2 */
        u16                        rx_buf_len;           /*    44     2 */
        u16                        next_to_use;          /*    46     2 */
        u16                        next_to_clean;        /*    48     2 */
        u8                         queue_index;          /*    50     1 */
        u8                         reg_idx;              /*    51     1 */
        u16                        work_limit;           /*    52     2 */

        /* XXX 2 bytes hole, try to pack */

        u8 *                       tail;                 /*    56     8 */
        /* --- cacheline 1 boundary (64 bytes) --- */

Now we can set the VLAN priority directly and it will be
correct. User space can indicate the 802.1Qaz priority
using the SO_PRIORITY setsocket() option and QOS layer will
steer the skb to the correct rings. Additionally using
the multiq qdisc with a queue_mapping action works as
well.
Signed-off-by: NJohn Fastabend <john.r.fastabend@intel.com>
Tested-by: NRoss Brattain <ross.b.brattain@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>
      e5b64635
    • J
      ixgbe: DCB, implement capabilities flags · 3032309b
      由 John Fastabend 提交于 
      This implements dcbnl get and set capabilities ops. The
devices supported by ixgbe can be configured to run in
IEEE or CEE modes but not both.

With the DCBX set capabilities bit we add an explicit
signal that must be used to toggle between these modes.
This patch adds logic to fail the CEE command set_hw_all()
which programs the device with a CEE configuration if
the CEE caps bit is not set. Similarly, IEEE set
commands will fail if the IEEE caps bit is not set. We
allow most CEE config set commands to occur because they
do not touch the hardware until set_hw_all() is called.

The one exception to the above is the {set|get}app routines.
These must always be protected by caps bits to ensure
side effects do not corrupt the current configured mode.

By requiring the caps bit to be set correctly we can
maintain a consistent configuration in the hardware
for CEE or IEEE modes and prevent partial hardware
configurations that may occur if user space does
not send a complete IEEE or CEE configurations.

It is expected that user space will signal a DCBX mode
before programming device.
Signed-off-by: NJohn Fastabend <john.r.fastabend@intel.com>
Tested-by: NRoss Brattain <ross.b.brattain@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>
      3032309b
  3. 08 3月, 2011 2 次提交
  5. 03 3月, 2011 3 次提交
  7. 24 2月, 2011 1 次提交
  9. 17 2月, 2011 1 次提交
  11. 12 2月, 2011 5 次提交
  13. 08 2月, 2011 3 次提交
  15. 14 1月, 2011 1 次提交
    • E
      net: remove dev_txq_stats_fold() · 1ac9ad13
      由 Eric Dumazet 提交于 
      After recent changes, (percpu stats on vlan/tunnels...), we dont need
anymore per struct netdev_queue tx_bytes/tx_packets/tx_dropped counters.

Only remaining users are ixgbe, sch_teql, gianfar & macvlan :

1) ixgbe can be converted to use existing tx_ring counters.

2) macvlan incremented txq->tx_dropped, it can use the
dev->stats.tx_dropped counter.

3) sch_teql : almost revert ab35cd4b (Use net_device internal stats)
    Now we have ndo_get_stats64(), use it, even for "unsigned long"
fields (No need to bring back a struct net_device_stats)

4) gianfar adds a stats structure per tx queue to hold
tx_bytes/tx_packets

This removes a lockdep warning (and possible lockup) in rndis gadget,
calling dev_get_stats() from hard IRQ context.

Ref: http://www.spinics.net/lists/netdev/msg149202.htmlReported-by: NNeil Jones <neiljay@gmail.com>
Signed-off-by: NEric Dumazet <eric.dumazet@gmail.com>
CC: Jarek Poplawski <jarkao2@gmail.com>
CC: Alexander Duyck <alexander.h.duyck@intel.com>
CC: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
CC: Sandeep Gopalpet <sandeep.kumar@freescale.com>
CC: Michal Nazarewicz <mina86@mina86.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      1ac9ad13
  17. 10 1月, 2011 4 次提交
  19. 25 12月, 2010 2 次提交
  21. 12 12月, 2010 1 次提交
  23. 11 12月, 2010 2 次提交
  25. 07 12月, 2010 2 次提交
  27. 04 12月, 2010 4 次提交
  29. 28 11月, 2010 1 次提交
  31. 22 11月, 2010 1 次提交
  33. 17 11月, 2010 2 次提交