From: Claudiu Manoil Date: Mon, 13 Jul 2015 13:22:05 +0000 (+0300) Subject: gianfar: Use ndev, more Rx path cleanup X-Git-Tag: firefly_0821_release~176^2~1159^2~362^2~1 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=f23223f15fd7d359a08ea346a0a537ccaf417014;p=firefly-linux-kernel-4.4.55.git gianfar: Use ndev, more Rx path cleanup Use "ndev" instead of "dev", as the rx queue back pointer to a net_device struct, to avoid name clashing with a "struct device" reference. This prepares the addition of a "struct device" back pointer to the rx queue structure. Remove duplicated rxq registration in the process. Move napi_gro_receive() outside gfar_process_frame(). Signed-off-by: Claudiu Manoil Signed-off-by: David S. Miller --- diff --git a/drivers/net/ethernet/freescale/gianfar.c b/drivers/net/ethernet/freescale/gianfar.c index c839e7628181..7654d5eafeeb 100644 --- a/drivers/net/ethernet/freescale/gianfar.c +++ b/drivers/net/ethernet/freescale/gianfar.c @@ -141,8 +141,7 @@ static void gfar_netpoll(struct net_device *dev); #endif int gfar_clean_rx_ring(struct gfar_priv_rx_q *rx_queue, int rx_work_limit); static void gfar_clean_tx_ring(struct gfar_priv_tx_q *tx_queue); -static void gfar_process_frame(struct net_device *dev, struct sk_buff *skb, - struct napi_struct *napi); +static void gfar_process_frame(struct net_device *ndev, struct sk_buff *skb); static void gfar_halt_nodisable(struct gfar_private *priv); static void gfar_clear_exact_match(struct net_device *dev); static void gfar_set_mac_for_addr(struct net_device *dev, int num, @@ -262,7 +261,7 @@ static int gfar_alloc_skb_resources(struct net_device *ndev) rx_queue = priv->rx_queue[i]; rx_queue->rx_bd_base = vaddr; rx_queue->rx_bd_dma_base = addr; - rx_queue->dev = ndev; + rx_queue->ndev = ndev; addr += sizeof(struct rxbd8) * rx_queue->rx_ring_size; vaddr += sizeof(struct rxbd8) * rx_queue->rx_ring_size; } @@ -593,7 +592,7 @@ static int gfar_alloc_rx_queues(struct gfar_private *priv) priv->rx_queue[i]->rx_skbuff = NULL; priv->rx_queue[i]->qindex = i; - priv->rx_queue[i]->dev = priv->ndev; + priv->rx_queue[i]->ndev = priv->ndev; } return 0; } @@ -1913,7 +1912,7 @@ static void free_skb_tx_queue(struct gfar_priv_tx_q *tx_queue) static void free_skb_rx_queue(struct gfar_priv_rx_q *rx_queue) { struct rxbd8 *rxbdp; - struct gfar_private *priv = netdev_priv(rx_queue->dev); + struct gfar_private *priv = netdev_priv(rx_queue->ndev); int i; rxbdp = rx_queue->rx_bd_base; @@ -2709,17 +2708,17 @@ static struct sk_buff *gfar_new_skb(struct net_device *ndev, static void gfar_rx_alloc_err(struct gfar_priv_rx_q *rx_queue) { - struct gfar_private *priv = netdev_priv(rx_queue->dev); + struct gfar_private *priv = netdev_priv(rx_queue->ndev); struct gfar_extra_stats *estats = &priv->extra_stats; - netdev_err(rx_queue->dev, "Can't alloc RX buffers\n"); + netdev_err(rx_queue->ndev, "Can't alloc RX buffers\n"); atomic64_inc(&estats->rx_alloc_err); } static void gfar_alloc_rx_buffs(struct gfar_priv_rx_q *rx_queue, int alloc_cnt) { - struct net_device *ndev = rx_queue->dev; + struct net_device *ndev = rx_queue->ndev; struct rxbd8 *bdp, *base; dma_addr_t bufaddr; int i; @@ -2756,10 +2755,10 @@ static void gfar_alloc_rx_buffs(struct gfar_priv_rx_q *rx_queue, rx_queue->next_to_use = i; } -static void count_errors(u32 lstatus, struct net_device *dev) +static void count_errors(u32 lstatus, struct net_device *ndev) { - struct gfar_private *priv = netdev_priv(dev); - struct net_device_stats *stats = &dev->stats; + struct gfar_private *priv = netdev_priv(ndev); + struct net_device_stats *stats = &ndev->stats; struct gfar_extra_stats *estats = &priv->extra_stats; /* If the packet was truncated, none of the other errors matter */ @@ -2854,10 +2853,9 @@ static inline void gfar_rx_checksum(struct sk_buff *skb, struct rxfcb *fcb) } /* gfar_process_frame() -- handle one incoming packet if skb isn't NULL. */ -static void gfar_process_frame(struct net_device *dev, struct sk_buff *skb, - struct napi_struct *napi) +static void gfar_process_frame(struct net_device *ndev, struct sk_buff *skb) { - struct gfar_private *priv = netdev_priv(dev); + struct gfar_private *priv = netdev_priv(ndev); struct rxfcb *fcb = NULL; /* fcb is at the beginning if exists */ @@ -2866,10 +2864,8 @@ static void gfar_process_frame(struct net_device *dev, struct sk_buff *skb, /* Remove the FCB from the skb * Remove the padded bytes, if there are any */ - if (priv->uses_rxfcb) { - skb_record_rx_queue(skb, fcb->rq); + if (priv->uses_rxfcb) skb_pull(skb, GMAC_FCB_LEN); - } /* Get receive timestamp from the skb */ if (priv->hwts_rx_en) { @@ -2883,24 +2879,20 @@ static void gfar_process_frame(struct net_device *dev, struct sk_buff *skb, if (priv->padding) skb_pull(skb, priv->padding); - if (dev->features & NETIF_F_RXCSUM) + if (ndev->features & NETIF_F_RXCSUM) gfar_rx_checksum(skb, fcb); /* Tell the skb what kind of packet this is */ - skb->protocol = eth_type_trans(skb, dev); + skb->protocol = eth_type_trans(skb, ndev); /* There's need to check for NETIF_F_HW_VLAN_CTAG_RX here. * Even if vlan rx accel is disabled, on some chips * RXFCB_VLN is pseudo randomly set. */ - if (dev->features & NETIF_F_HW_VLAN_CTAG_RX && + if (ndev->features & NETIF_F_HW_VLAN_CTAG_RX && be16_to_cpu(fcb->flags) & RXFCB_VLN) __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), be16_to_cpu(fcb->vlctl)); - - /* Send the packet up the stack */ - napi_gro_receive(napi, skb); - } /* gfar_clean_rx_ring() -- Processes each frame in the rx ring @@ -2909,12 +2901,12 @@ static void gfar_process_frame(struct net_device *dev, struct sk_buff *skb, */ int gfar_clean_rx_ring(struct gfar_priv_rx_q *rx_queue, int rx_work_limit) { - struct net_device *dev = rx_queue->dev; + struct net_device *ndev = rx_queue->ndev; struct rxbd8 *bdp, *base; struct sk_buff *skb; int i, howmany = 0; int cleaned_cnt = gfar_rxbd_unused(rx_queue); - struct gfar_private *priv = netdev_priv(dev); + struct gfar_private *priv = netdev_priv(ndev); /* Get the first full descriptor */ base = rx_queue->rx_bd_base; @@ -2948,7 +2940,7 @@ int gfar_clean_rx_ring(struct gfar_priv_rx_q *rx_queue, int rx_work_limit) if (unlikely(!(lstatus & BD_LFLAG(RXBD_LAST)) || (lstatus & BD_LFLAG(RXBD_ERR)))) { - count_errors(lstatus, dev); + count_errors(lstatus, ndev); /* discard faulty buffer */ dev_kfree_skb(skb); @@ -2965,11 +2957,13 @@ int gfar_clean_rx_ring(struct gfar_priv_rx_q *rx_queue, int rx_work_limit) skb_put(skb, pkt_len); rx_queue->stats.rx_bytes += pkt_len; skb_record_rx_queue(skb, rx_queue->qindex); - gfar_process_frame(dev, skb, - &rx_queue->grp->napi_rx); + gfar_process_frame(ndev, skb); + + /* Send the packet up the stack */ + napi_gro_receive(&rx_queue->grp->napi_rx, skb); } else { - netif_warn(priv, rx_err, dev, "Missing skb!\n"); + netif_warn(priv, rx_err, ndev, "Missing skb!\n"); rx_queue->stats.rx_dropped++; atomic64_inc(&priv->extra_stats.rx_skbmissing); } diff --git a/drivers/net/ethernet/freescale/gianfar.h b/drivers/net/ethernet/freescale/gianfar.h index cadb068cb37f..edf8529ed356 100644 --- a/drivers/net/ethernet/freescale/gianfar.h +++ b/drivers/net/ethernet/freescale/gianfar.h @@ -1022,7 +1022,7 @@ struct rx_q_stats { * @next_to_use: index of the next buffer to be alloc'd * @next_to_clean: index of the next buffer to be cleaned * @qindex: index of this queue - * @dev: back pointer to the dev structure + * @ndev: back pointer to net_device * @rx_ring_size: Rx ring size * @rxcoalescing: enable/disable rx-coalescing * @rxic: receive interrupt coalescing vlaue @@ -1031,7 +1031,7 @@ struct rx_q_stats { struct gfar_priv_rx_q { struct sk_buff **rx_skbuff __aligned(SMP_CACHE_BYTES); struct rxbd8 *rx_bd_base; - struct net_device *dev; + struct net_device *ndev; struct gfar_priv_grp *grp; u16 rx_ring_size; u16 qindex;