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Spidernet DMA coalescing

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The current driver code performs 512 DMA mappings of a bunch of
32-byte ring descriptor structures. This is silly, as they are
all in contiguous memory. This patch changes the code to
dma_map_coherent() each rx/tx ring as a whole.

Signed-off-by: Linas Vepstas <linas@austin.ibm.com>
Cc: James K Lewis <jklewis@us.ibm.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Linas Vepstas
2006-12-13 15:06:59 -06:00
committed by Jeff Garzik
parent 834324687d
commit d4ed8f8d1f
3 changed files with 55 additions and 71 deletions
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4
drivers/net/spider_net_ethtool.c
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@@ -158,9 +158,9 @@ spider_net_ethtool_get_ringparam(struct net_device *netdev,
struct spider_net_card *card = netdev->priv;
ering->tx_max_pending = SPIDER_NET_TX_DESCRIPTORS_MAX;
ering->tx_pending = card->num_tx_desc;
ering->tx_pending = card->tx_chain.num_desc;
ering->rx_max_pending = SPIDER_NET_RX_DESCRIPTORS_MAX;
ering->rx_pending = card->num_rx_desc;
ering->rx_pending = card->rx_chain.num_desc;
}
static int spider_net_get_stats_count(struct net_device *netdev)