Spidernet DMA coalescing
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>
diff --git a/drivers/net/spider_net_ethtool.c b/drivers/net/spider_net_ethtool.c
index 91b9951..6bcf03f 100644
--- a/drivers/net/spider_net_ethtool.c
+++ b/drivers/net/spider_net_ethtool.c
@@ -158,9 +158,9 @@
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)