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Date: Fri, 7 Apr 2017 10:29:34 +0200
From: Nicolas Ferre <nicolas.ferre@...rochip.com>
To: Tobias Klauser <tklauser@...tanz.ch>, <netdev@...r.kernel.org>
Subject: Re: [PATCH net-next 05/14] net: macb: Use net_device_stats from
struct net_device
Le 07/04/2017 à 10:17, Tobias Klauser a écrit :
> Instead of using a private copy of struct net_device_stats in struct
> macb, use stats from struct net_device.
I agree with the initiative but I read this in the documentation of this
struct member...
@stats: Statistics struct, which was left as a legacy, use
rtnl_link_stats64 instead
Is it still permitted to use it? Would it be to directly move to the
most up-to-date code?
Regards,
> Cc: Nicolas Ferre <nicolas.ferre@...el.com>
> Signed-off-by: Tobias Klauser <tklauser@...tanz.ch>
> ---
> drivers/net/ethernet/cadence/macb.c | 40 ++++++++++++++++++-------------------
> drivers/net/ethernet/cadence/macb.h | 1 -
> 2 files changed, 20 insertions(+), 21 deletions(-)
>
> diff --git a/drivers/net/ethernet/cadence/macb.c b/drivers/net/ethernet/cadence/macb.c
> index 30606b11b128..5cbd1e7a926a 100644
> --- a/drivers/net/ethernet/cadence/macb.c
> +++ b/drivers/net/ethernet/cadence/macb.c
> @@ -684,8 +684,8 @@ static void macb_tx_error_task(struct work_struct *work)
> netdev_vdbg(bp->dev, "txerr skb %u (data %p) TX complete\n",
> macb_tx_ring_wrap(bp, tail),
> skb->data);
> - bp->stats.tx_packets++;
> - bp->stats.tx_bytes += skb->len;
> + bp->dev->stats.tx_packets++;
> + bp->dev->stats.tx_bytes += skb->len;
> }
> } else {
> /* "Buffers exhausted mid-frame" errors may only happen
> @@ -778,8 +778,8 @@ static void macb_tx_interrupt(struct macb_queue *queue)
> netdev_vdbg(bp->dev, "skb %u (data %p) TX complete\n",
> macb_tx_ring_wrap(bp, tail),
> skb->data);
> - bp->stats.tx_packets++;
> - bp->stats.tx_bytes += skb->len;
> + bp->dev->stats.tx_packets++;
> + bp->dev->stats.tx_bytes += skb->len;
> }
>
> /* Now we can safely release resources */
> @@ -911,14 +911,14 @@ static int gem_rx(struct macb *bp, int budget)
> if (!(ctrl & MACB_BIT(RX_SOF) && ctrl & MACB_BIT(RX_EOF))) {
> netdev_err(bp->dev,
> "not whole frame pointed by descriptor\n");
> - bp->stats.rx_dropped++;
> + bp->dev->stats.rx_dropped++;
> break;
> }
> skb = bp->rx_skbuff[entry];
> if (unlikely(!skb)) {
> netdev_err(bp->dev,
> "inconsistent Rx descriptor chain\n");
> - bp->stats.rx_dropped++;
> + bp->dev->stats.rx_dropped++;
> break;
> }
> /* now everything is ready for receiving packet */
> @@ -938,8 +938,8 @@ static int gem_rx(struct macb *bp, int budget)
> GEM_BFEXT(RX_CSUM, ctrl) & GEM_RX_CSUM_CHECKED_MASK)
> skb->ip_summed = CHECKSUM_UNNECESSARY;
>
> - bp->stats.rx_packets++;
> - bp->stats.rx_bytes += skb->len;
> + bp->dev->stats.rx_packets++;
> + bp->dev->stats.rx_bytes += skb->len;
>
> #if defined(DEBUG) && defined(VERBOSE_DEBUG)
> netdev_vdbg(bp->dev, "received skb of length %u, csum: %08x\n",
> @@ -984,7 +984,7 @@ static int macb_rx_frame(struct macb *bp, unsigned int first_frag,
> */
> skb = netdev_alloc_skb(bp->dev, len + NET_IP_ALIGN);
> if (!skb) {
> - bp->stats.rx_dropped++;
> + bp->dev->stats.rx_dropped++;
> for (frag = first_frag; ; frag++) {
> desc = macb_rx_desc(bp, frag);
> desc->addr &= ~MACB_BIT(RX_USED);
> @@ -1030,8 +1030,8 @@ static int macb_rx_frame(struct macb *bp, unsigned int first_frag,
> __skb_pull(skb, NET_IP_ALIGN);
> skb->protocol = eth_type_trans(skb, bp->dev);
>
> - bp->stats.rx_packets++;
> - bp->stats.rx_bytes += skb->len;
> + bp->dev->stats.rx_packets++;
> + bp->dev->stats.rx_bytes += skb->len;
> netdev_vdbg(bp->dev, "received skb of length %u, csum: %08x\n",
> skb->len, skb->csum);
> netif_receive_skb(skb);
> @@ -2210,7 +2210,7 @@ static void gem_update_stats(struct macb *bp)
> static struct net_device_stats *gem_get_stats(struct macb *bp)
> {
> struct gem_stats *hwstat = &bp->hw_stats.gem;
> - struct net_device_stats *nstat = &bp->stats;
> + struct net_device_stats *nstat = &bp->dev->stats;
>
> gem_update_stats(bp);
>
> @@ -2281,7 +2281,7 @@ static void gem_get_ethtool_strings(struct net_device *dev, u32 sset, u8 *p)
> static struct net_device_stats *macb_get_stats(struct net_device *dev)
> {
> struct macb *bp = netdev_priv(dev);
> - struct net_device_stats *nstat = &bp->stats;
> + struct net_device_stats *nstat = &bp->dev->stats;
> struct macb_stats *hwstat = &bp->hw_stats.macb;
>
> if (macb_is_gem(bp))
> @@ -2993,15 +2993,15 @@ static void at91ether_rx(struct net_device *dev)
> memcpy(skb_put(skb, pktlen), p_recv, pktlen);
>
> skb->protocol = eth_type_trans(skb, dev);
> - lp->stats.rx_packets++;
> - lp->stats.rx_bytes += pktlen;
> + dev->stats.rx_packets++;
> + dev->stats.rx_bytes += pktlen;
> netif_rx(skb);
> } else {
> - lp->stats.rx_dropped++;
> + dev->stats.rx_dropped++;
> }
>
> if (desc->ctrl & MACB_BIT(RX_MHASH_MATCH))
> - lp->stats.multicast++;
> + dev->stats.multicast++;
>
> /* reset ownership bit */
> desc->addr &= ~MACB_BIT(RX_USED);
> @@ -3036,15 +3036,15 @@ static irqreturn_t at91ether_interrupt(int irq, void *dev_id)
> if (intstatus & MACB_BIT(TCOMP)) {
> /* The TCOM bit is set even if the transmission failed */
> if (intstatus & (MACB_BIT(ISR_TUND) | MACB_BIT(ISR_RLE)))
> - lp->stats.tx_errors++;
> + dev->stats.tx_errors++;
>
> if (lp->skb) {
> dev_kfree_skb_irq(lp->skb);
> lp->skb = NULL;
> dma_unmap_single(NULL, lp->skb_physaddr,
> lp->skb_length, DMA_TO_DEVICE);
> - lp->stats.tx_packets++;
> - lp->stats.tx_bytes += lp->skb_length;
> + dev->stats.tx_packets++;
> + dev->stats.tx_bytes += lp->skb_length;
> }
> netif_wake_queue(dev);
> }
> diff --git a/drivers/net/ethernet/cadence/macb.h b/drivers/net/ethernet/cadence/macb.h
> index 234a49eaccfd..ec037b0fa2a4 100644
> --- a/drivers/net/ethernet/cadence/macb.h
> +++ b/drivers/net/ethernet/cadence/macb.h
> @@ -919,7 +919,6 @@ struct macb {
> struct clk *rx_clk;
> struct net_device *dev;
> struct napi_struct napi;
> - struct net_device_stats stats;
> union {
> struct macb_stats macb;
> struct gem_stats gem;
>
--
Nicolas Ferre
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