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authorKunihiko Hayashi <hayashi.kunihiko@socionext.com>2018-11-29 17:08:37 +0900
committerDavid S. Miller <davem@davemloft.net>2018-11-29 10:38:39 -0800
commit88113957ddb7b7d5451e28cd708c82ea7e63b097 (patch)
tree6995c7ce2b4c6e1ea7371af5ea7eaf9934ee76f2
parent09ee3b4a249dd5c64da7d25a52a4ce42a49d647a (diff)
downloadlinux-88113957ddb7b7d5451e28cd708c82ea7e63b097.tar.bz2
net: ethernet: ave: Replace NET_IP_ALIGN with AVE_FRAME_HEADROOM
In commit 26a4676faa1a ("arm64: mm: define NET_IP_ALIGN to 0"), AVE controller affects this modification because the controller forces to ignore lower 2bits of buffer start address, and make 2-byte headroom, that is, data reception starts from (buffer + 2). This patch defines AVE_FRAME_HEADROOM macro as hardware-specific value, and replaces NET_IP_ALIGN with it. Signed-off-by: Kunihiko Hayashi <hayashi.kunihiko@socionext.com> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--drivers/net/ethernet/socionext/sni_ave.c14
1 files changed, 8 insertions, 6 deletions
diff --git a/drivers/net/ethernet/socionext/sni_ave.c b/drivers/net/ethernet/socionext/sni_ave.c
index 29b5b12bce6c..0da11344d035 100644
--- a/drivers/net/ethernet/socionext/sni_ave.c
+++ b/drivers/net/ethernet/socionext/sni_ave.c
@@ -194,6 +194,7 @@
/* Parameter for ethernet frame */
#define AVE_MAX_ETHFRAME 1518
+#define AVE_FRAME_HEADROOM 2
/* Parameter for interrupt */
#define AVE_INTM_COUNT 20
@@ -576,12 +577,13 @@ static int ave_rxdesc_prepare(struct net_device *ndev, int entry)
skb = priv->rx.desc[entry].skbs;
if (!skb) {
- skb = netdev_alloc_skb_ip_align(ndev,
- AVE_MAX_ETHFRAME);
+ skb = netdev_alloc_skb(ndev, AVE_MAX_ETHFRAME);
if (!skb) {
netdev_err(ndev, "can't allocate skb for Rx\n");
return -ENOMEM;
}
+ skb->data += AVE_FRAME_HEADROOM;
+ skb->tail += AVE_FRAME_HEADROOM;
}
/* set disable to cmdsts */
@@ -594,12 +596,12 @@ static int ave_rxdesc_prepare(struct net_device *ndev, int entry)
* - Rx buffer begins with 2 byte headroom, and data will be put from
* (buffer + 2).
* To satisfy this, specify the address to put back the buffer
- * pointer advanced by NET_IP_ALIGN by netdev_alloc_skb_ip_align(),
- * and expand the map size by NET_IP_ALIGN.
+ * pointer advanced by AVE_FRAME_HEADROOM, and expand the map size
+ * by AVE_FRAME_HEADROOM.
*/
ret = ave_dma_map(ndev, &priv->rx.desc[entry],
- skb->data - NET_IP_ALIGN,
- AVE_MAX_ETHFRAME + NET_IP_ALIGN,
+ skb->data - AVE_FRAME_HEADROOM,
+ AVE_MAX_ETHFRAME + AVE_FRAME_HEADROOM,
DMA_FROM_DEVICE, &paddr);
if (ret) {
netdev_err(ndev, "can't map skb for Rx\n");