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| author | Alexander Duyck <alexander.h.duyck@intel.com> | 2008-12-10 01:08:59 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2008-12-10 01:08:59 -0800 |
| commit | b4557be23dc959f38eed21d359ec7164e42bcbd6 (patch) | |
| tree | 31fbd133f8df8ea7a187f0a6a36d61b04dac36fb /drivers/net/igb | |
| parent | e97fd7c6d51d8bf32ce981b853d987cfc6bdfb7f (diff) | |
| download | linux-b4557be23dc959f38eed21d359ec7164e42bcbd6.tar.gz linux-b4557be23dc959f38eed21d359ec7164e42bcbd6.tar.bz2 linux-b4557be23dc959f38eed21d359ec7164e42bcbd6.zip | |
igb: update handling of RCTL for smaller buffer sizes
As we begin to move into virtualization the use of a global value for
buffer sizes becomes undesirable. This change makes it so only 256 and 512
byte buffers require use of the RCTL register.
Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/igb')
| -rw-r--r-- | drivers/net/igb/igb_main.c | 32 |
1 files changed, 14 insertions, 18 deletions
diff --git a/drivers/net/igb/igb_main.c b/drivers/net/igb/igb_main.c index c49b8d8f80f2..dad742f8d23a 100644 --- a/drivers/net/igb/igb_main.c +++ b/drivers/net/igb/igb_main.c @@ -1801,25 +1801,21 @@ static void igb_setup_rctl(struct igb_adapter *adapter) */ rctl &= ~(E1000_RCTL_SBP | E1000_RCTL_LPE | E1000_RCTL_SZ_256); - if (adapter->netdev->mtu <= ETH_DATA_LEN) { - /* Setup buffer sizes */ - switch (adapter->rx_buffer_len) { - case IGB_RXBUFFER_256: - rctl |= E1000_RCTL_SZ_256; - break; - case IGB_RXBUFFER_512: - rctl |= E1000_RCTL_SZ_512; - break; - case IGB_RXBUFFER_1024: - rctl |= E1000_RCTL_SZ_1024; - break; - default: - rctl |= E1000_RCTL_SZ_2048; - break; - } - } else { + if (adapter->netdev->mtu > ETH_DATA_LEN) rctl |= E1000_RCTL_LPE; - srrctl = adapter->rx_buffer_len >> E1000_SRRCTL_BSIZEPKT_SHIFT; + + /* Setup buffer sizes */ + switch (adapter->rx_buffer_len) { + case IGB_RXBUFFER_256: + rctl |= E1000_RCTL_SZ_256; + break; + case IGB_RXBUFFER_512: + rctl |= E1000_RCTL_SZ_512; + break; + default: + srrctl = ALIGN(adapter->rx_buffer_len, 1024) + >> E1000_SRRCTL_BSIZEPKT_SHIFT; + break; } /* 82575 and greater support packet-split where the protocol |