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Message-Id: <1260423764-21210-1-git-send-email-Sandeep.Kumar@freescale.com>
Date: Thu, 10 Dec 2009 11:12:44 +0530
From: Sandeep Gopalpet <Sandeep.Kumar@...escale.com>
To: eric.dumazet@...il.com, netdev@...r.kernel.org,
avorontsov@...mvista.com
Cc: davem@...emloft.net, Sandeep Gopalpet <Sandeep.Kumar@...escale.com>
Subject: [RFC] gianfar: Fix stats support
This patch updates the per rx/tx queue stats.
To update the per rx queue stats a new structure has been
introduced rx_q_stats.
The per tx queue stats are updated via the netdev_queue
structure itself.
Note that we update only the tx_packtes, tx_bytes, rx_packets,
rx_bytes and rx_dropped stats on a per queue basis.
Signed-off-by: Sandeep Gopalpet <Sandeep.Kumar@...escale.com>
---
*. The device stats are updated via .ndo_get_stats
*. Please provide your inputs on this patch for any other
modifications.
*. If per queue stats {rx_packets | rx_bytes | tx_packtes | tx_bytes }
are to be exposed they can be done via gfar_fill_stats (via ethtool
stats dump). Please provide inputs if we need to expose the per queue
stats as well.
drivers/net/gianfar.c | 43 +++++++++++++++++++++++++++++++++++++------
drivers/net/gianfar.h | 10 ++++++++++
2 files changed, 47 insertions(+), 6 deletions(-)
diff --git a/drivers/net/gianfar.c b/drivers/net/gianfar.c
index 73ccb07..7e6f4e4 100644
--- a/drivers/net/gianfar.c
+++ b/drivers/net/gianfar.c
@@ -143,6 +143,7 @@ void gfar_start(struct net_device *dev);
static void gfar_clear_exact_match(struct net_device *dev);
static void gfar_set_mac_for_addr(struct net_device *dev, int num, u8 *addr);
static int gfar_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
+static struct net_device_stats *gfar_get_stats(struct net_device *dev);
u16 gfar_select_queue(struct net_device *dev, struct sk_buff *skb);
MODULE_AUTHOR("Freescale Semiconductor, Inc");
@@ -426,6 +427,7 @@ static const struct net_device_ops gfar_netdev_ops = {
.ndo_tx_timeout = gfar_timeout,
.ndo_do_ioctl = gfar_ioctl,
.ndo_select_queue = gfar_select_queue,
+ .ndo_get_stats = gfar_get_stats,
.ndo_vlan_rx_register = gfar_vlan_rx_register,
.ndo_set_mac_address = eth_mac_addr,
.ndo_validate_addr = eth_validate_addr,
@@ -469,6 +471,36 @@ void unlock_tx_qs(struct gfar_private *priv)
spin_unlock(&priv->tx_queue[i]->txlock);
}
+static struct net_device_stats *gfar_get_stats(struct net_device *dev)
+{
+ struct gfar_private *priv = netdev_priv(dev);
+ struct netdev_queue *txq;
+ unsigned long rx_packets = 0, rx_bytes = 0, rx_dropped = 0;
+ unsigned long tx_packets = 0, tx_bytes = 0;
+ int i = 0;
+
+ for (i = 0; i < priv->num_rx_queues; i++) {
+ rx_packets += priv->rx_queue[i]->stats.rx_packets;
+ rx_bytes += priv->rx_queue[i]->stats.rx_bytes;
+ rx_dropped += priv->rx_queue[i]->stats.rx_dropped;
+ }
+
+ dev->stats.rx_packets = rx_packets;
+ dev->stats.rx_bytes = rx_bytes;
+ dev->stats.rx_dropped = rx_dropped;
+
+ for (i = 0; i < priv->num_tx_queues; i++) {
+ txq = netdev_get_tx_queue(dev, i);
+ tx_bytes += txq->tx_bytes;
+ tx_packets += txq->tx_packets;
+ }
+
+ dev->stats.tx_bytes = tx_bytes;
+ dev->stats.tx_packets = tx_packets;
+
+ return &dev->stats;
+}
+
/* Returns 1 if incoming frames use an FCB */
static inline int gfar_uses_fcb(struct gfar_private *priv)
{
@@ -1943,7 +1975,8 @@ static int gfar_start_xmit(struct sk_buff *skb, struct net_device *dev)
}
/* Update transmit stats */
- dev->stats.tx_bytes += skb->len;
+ txq->tx_bytes += skb->len;
+ txq->tx_packets ++;
txbdp = txbdp_start = tx_queue->cur_tx;
@@ -2301,8 +2334,6 @@ static int gfar_clean_tx_ring(struct gfar_priv_tx_q *tx_queue)
tx_queue->skb_dirtytx = skb_dirtytx;
tx_queue->dirty_tx = bdp;
- dev->stats.tx_packets += howmany;
-
return howmany;
}
@@ -2516,14 +2547,14 @@ int gfar_clean_rx_ring(struct gfar_priv_rx_q *rx_queue, int rx_work_limit)
}
} else {
/* Increment the number of packets */
- dev->stats.rx_packets++;
+ rx_queue->stats.rx_packets++;
howmany++;
if (likely(skb)) {
pkt_len = bdp->length - ETH_FCS_LEN;
/* Remove the FCS from the packet length */
skb_put(skb, pkt_len);
- dev->stats.rx_bytes += pkt_len;
+ rx_queue->stats.rx_bytes += pkt_len;
gfar_process_frame(dev, skb, amount_pull);
@@ -2531,7 +2562,7 @@ int gfar_clean_rx_ring(struct gfar_priv_rx_q *rx_queue, int rx_work_limit)
if (netif_msg_rx_err(priv))
printk(KERN_WARNING
"%s: Missing skb!\n", dev->name);
- dev->stats.rx_dropped++;
+ rx_queue->stats.rx_dropped++;
priv->extra_stats.rx_skbmissing++;
}
diff --git a/drivers/net/gianfar.h b/drivers/net/gianfar.h
index 68d16dc..4943cbe 100644
--- a/drivers/net/gianfar.h
+++ b/drivers/net/gianfar.h
@@ -940,6 +940,15 @@ struct gfar_priv_tx_q {
unsigned short txtime;
};
+/*
+ * Per RX queue stats
+ */
+struct rx_q_stats {
+ unsigned long rx_packets;
+ unsigned long rx_bytes;
+ unsigned long rx_dropped;
+};
+
/**
* struct gfar_priv_rx_q - per rx queue structure
* @rxlock: per queue rx spin lock
@@ -962,6 +971,7 @@ struct gfar_priv_rx_q {
struct rxbd8 *cur_rx;
struct net_device *dev;
struct gfar_priv_grp *grp;
+ struct rx_q_stats stats;
u16 skb_currx;
u16 qindex;
unsigned int rx_ring_size;
--
1.5.6.5
--
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