[PATCH] Add ethtool -g support to Spidernet network driver

Add ethtool -g (show ring sizes) support to the Spidernet network driver.

Signed-off-by: James K Lewis <jklewis@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

3 files changed, 23 insertions, 5 deletions

diff --git a/drivers/net/spider_net.c b/drivers/net/spider_net.c
index 647f62e9707d..88907218457a 100644
--- a/drivers/net/spider_net.c
+++ b/drivers/net/spider_net.c
@@ -1611,13 +1611,12 @@ spider_net_open(struct net_device *netdev)
         int result;
 
         result = -ENOMEM;
-        if (spider_net_init_chain(card, &card->tx_chain,
-                        card->descr,
-                        PCI_DMA_TODEVICE, tx_descriptors))
+        if (spider_net_init_chain(card, &card->tx_chain, card->descr,
+                        PCI_DMA_TODEVICE, card->tx_desc))
                 goto alloc_tx_failed;
         if (spider_net_init_chain(card, &card->rx_chain,
-                        card->descr + tx_descriptors,
-                        PCI_DMA_FROMDEVICE, rx_descriptors))
+                        card->descr + card->rx_desc,
+                        PCI_DMA_FROMDEVICE, card->rx_desc))
                 goto alloc_rx_failed;
 
         /* allocate rx skbs */
@@ -2005,6 +2004,9 @@ spider_net_setup_netdev(struct spider_net_card *card)
 
         card->options.rx_csum = SPIDER_NET_RX_CSUM_DEFAULT;
 
+        card->tx_desc = tx_descriptors;
+        card->rx_desc = rx_descriptors;
+
         spider_net_setup_netdev_ops(netdev);
 
         netdev->features = NETIF_F_HW_CSUM | NETIF_F_LLTX;
diff --git a/drivers/net/spider_net.h b/drivers/net/spider_net.h
index f6dcf180ae3d..30407cdf0892 100644
--- a/drivers/net/spider_net.h
+++ b/drivers/net/spider_net.h
@@ -440,6 +440,9 @@ struct spider_net_card {
         /* for ethtool */
         int msg_enable;
 
+        int rx_desc;
+        int tx_desc;
+
         struct spider_net_descr descr[0];
 };
 
diff --git a/drivers/net/spider_net_ethtool.c b/drivers/net/spider_net_ethtool.c
index a5bb0b7633af..02209222b8c9 100644
--- a/drivers/net/spider_net_ethtool.c
+++ b/drivers/net/spider_net_ethtool.c
@@ -130,6 +130,18 @@ spider_net_ethtool_set_tx_csum(struct net_device *netdev, uint32_t data)
         return 0;
 }
 
+static void
+spider_net_ethtool_get_ringparam(struct net_device *netdev,
+                                 struct ethtool_ringparam *ering)
+{
+        struct spider_net_card *card = netdev->priv;
+
+        ering->tx_max_pending = SPIDER_NET_TX_DESCRIPTORS_MAX;
+        ering->tx_pending = card->tx_desc;
+        ering->rx_max_pending = SPIDER_NET_RX_DESCRIPTORS_MAX;
+        ering->rx_pending = card->rx_desc;
+}
+
 struct ethtool_ops spider_net_ethtool_ops = {
         .get_settings           = spider_net_ethtool_get_settings,
         .get_drvinfo            = spider_net_ethtool_get_drvinfo,
@@ -141,5 +153,6 @@ struct ethtool_ops spider_net_ethtool_ops = {
         .set_rx_csum            = spider_net_ethtool_set_rx_csum,
         .get_tx_csum            = spider_net_ethtool_get_tx_csum,
         .set_tx_csum            = spider_net_ethtool_set_tx_csum,
+        .get_ringparam          = spider_net_ethtool_get_ringparam,
 };