diff options
| author | Michael Chan <mchan@broadcom.com> | 2007-12-12 11:19:57 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2008-01-28 14:57:32 -0800 |
| commit | 84eaa1877137def7fe01340f2abbad510aa890f5 (patch) | |
| tree | ed964fded82e861d4566dbaa16594625f9bce77c | |
| parent | 1db82f2aec0766edd4a4f8d86283e91559350de7 (diff) | |
| download | blackbird-op-linux-84eaa1877137def7fe01340f2abbad510aa890f5.tar.gz blackbird-op-linux-84eaa1877137def7fe01340f2abbad510aa890f5.zip | |
[BNX2]: Enable S/G for jumbo RX.
If the MTU requires more than 1 page for the SKB, enable the page ring
and calculate the size of the page ring. This will guarantee order-0
allocation regardless of the MTU size.
Fixup loopback test packet size so that we don't deal with the pages
during loopback test.
Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/bnx2.c | 21 |
1 files changed, 19 insertions, 2 deletions
diff --git a/drivers/net/bnx2.c b/drivers/net/bnx2.c index 6c0fc8a99c67..ae081c8dd45f 100644 --- a/drivers/net/bnx2.c +++ b/drivers/net/bnx2.c @@ -4493,15 +4493,32 @@ static u32 bnx2_find_max_ring(u32 ring_size, u32 max_size) static void bnx2_set_rx_ring_size(struct bnx2 *bp, u32 size) { - u32 rx_size; + u32 rx_size, rx_space, jumbo_size; /* 8 for CRC and VLAN */ rx_size = bp->dev->mtu + ETH_HLEN + bp->rx_offset + 8; + rx_space = SKB_DATA_ALIGN(rx_size + BNX2_RX_ALIGN) + NET_SKB_PAD + + sizeof(struct skb_shared_info); + bp->rx_copy_thresh = RX_COPY_THRESH; bp->rx_pg_ring_size = 0; bp->rx_max_pg_ring = 0; bp->rx_max_pg_ring_idx = 0; + if (rx_space > PAGE_SIZE) { + int pages = PAGE_ALIGN(bp->dev->mtu - 40) >> PAGE_SHIFT; + + jumbo_size = size * pages; + if (jumbo_size > MAX_TOTAL_RX_PG_DESC_CNT) + jumbo_size = MAX_TOTAL_RX_PG_DESC_CNT; + + bp->rx_pg_ring_size = jumbo_size; + bp->rx_max_pg_ring = bnx2_find_max_ring(jumbo_size, + MAX_RX_PG_RINGS); + bp->rx_max_pg_ring_idx = (bp->rx_max_pg_ring * RX_DESC_CNT) - 1; + rx_size = RX_COPY_THRESH + bp->rx_offset; + bp->rx_copy_thresh = 0; + } bp->rx_buf_use_size = rx_size; /* hw alignment */ @@ -4881,7 +4898,7 @@ bnx2_run_loopback(struct bnx2 *bp, int loopback_mode) else return -EINVAL; - pkt_size = 1514; + pkt_size = min(bp->dev->mtu + ETH_HLEN, bp->rx_jumbo_thresh - 4); skb = netdev_alloc_skb(bp->dev, pkt_size); if (!skb) return -ENOMEM; |
