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Subject[PATCH net-next 08/12] net: hns3: introduce ring_to_netdev() in enet module
Date
From: Yunsheng Lin <linyunsheng@huawei.com>

There are a few places that need to access the netdev of a ring
through ring->tqp->handle->kinfo.netdev, and ring->tqp is a struct
which both in enet and hclge modules, it is better to use the
struct that is only used in enet module.

This patch adds the ring_to_netdev() to access the netdev of ring
through ring->tqp_vector->napi.dev.

Also, struct hns3_enet_ring is a frequently used in critical data
path, so make it cacheline aligned as struct hns3_enet_tqp_vector.

Signed-off-by: Yunsheng Lin <linyunsheng@huawei.com>
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
---
drivers/net/ethernet/hisilicon/hns3/hns3_enet.c | 14 +++++++-------
drivers/net/ethernet/hisilicon/hns3/hns3_enet.h | 4 +++-
2 files changed, 10 insertions(+), 8 deletions(-)

diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
index a0810b3..7ddeb9c 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
@@ -2481,7 +2481,7 @@ static int is_valid_clean_head(struct hns3_enet_ring *ring, int h)

void hns3_clean_tx_ring(struct hns3_enet_ring *ring)
{
- struct net_device *netdev = ring->tqp->handle->kinfo.netdev;
+ struct net_device *netdev = ring_to_netdev(ring);
struct hns3_nic_priv *priv = netdev_priv(netdev);
struct netdev_queue *dev_queue;
int bytes, pkts;
@@ -2563,7 +2563,7 @@ static void hns3_nic_alloc_rx_buffers(struct hns3_enet_ring *ring,
ring->stats.sw_err_cnt++;
u64_stats_update_end(&ring->syncp);

- hns3_rl_err(ring->tqp_vector->napi.dev,
+ hns3_rl_err(ring_to_netdev(ring),
"alloc rx buffer failed: %d\n",
ret);
break;
@@ -2672,7 +2672,7 @@ static int hns3_gro_complete(struct sk_buff *skb, u32 l234info)
static void hns3_rx_checksum(struct hns3_enet_ring *ring, struct sk_buff *skb,
u32 l234info, u32 bd_base_info, u32 ol_info)
{
- struct net_device *netdev = ring->tqp->handle->kinfo.netdev;
+ struct net_device *netdev = ring_to_netdev(ring);
int l3_type, l4_type;
int ol4_type;

@@ -2788,7 +2788,7 @@ static int hns3_alloc_skb(struct hns3_enet_ring *ring, unsigned int length,
{
#define HNS3_NEED_ADD_FRAG 1
struct hns3_desc_cb *desc_cb = &ring->desc_cb[ring->next_to_clean];
- struct net_device *netdev = ring->tqp->handle->kinfo.netdev;
+ struct net_device *netdev = ring_to_netdev(ring);
struct sk_buff *skb;

ring->skb = napi_alloc_skb(&ring->tqp_vector->napi, HNS3_RX_HEAD_SIZE);
@@ -2869,7 +2869,7 @@ static int hns3_add_frag(struct hns3_enet_ring *ring, struct hns3_desc *desc,
new_skb = napi_alloc_skb(&ring->tqp_vector->napi,
HNS3_RX_HEAD_SIZE);
if (unlikely(!new_skb)) {
- hns3_rl_err(ring->tqp_vector->napi.dev,
+ hns3_rl_err(ring_to_netdev(ring),
"alloc rx fraglist skb fail\n");
return -ENXIO;
}
@@ -2945,7 +2945,7 @@ static void hns3_set_rx_skb_rss_type(struct hns3_enet_ring *ring,

static int hns3_handle_bdinfo(struct hns3_enet_ring *ring, struct sk_buff *skb)
{
- struct net_device *netdev = ring->tqp->handle->kinfo.netdev;
+ struct net_device *netdev = ring_to_netdev(ring);
enum hns3_pkt_l2t_type l2_frame_type;
u32 bd_base_info, l234info, ol_info;
struct hns3_desc *desc;
@@ -4227,7 +4227,7 @@ static int hns3_clear_rx_ring(struct hns3_enet_ring *ring)
/* if alloc new buffer fail, exit directly
* and reclear in up flow.
*/
- netdev_warn(ring->tqp->handle->kinfo.netdev,
+ netdev_warn(ring_to_netdev(ring),
"reserve buffer map failed, ret = %d\n",
ret);
return ret;
diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.h b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.h
index 3322284..0725dc5 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.h
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.h
@@ -435,7 +435,7 @@ struct hns3_enet_ring {
int pending_buf;
struct sk_buff *skb;
struct sk_buff *tail_skb;
-};
+} ____cacheline_internodealigned_in_smp;

enum hns3_flow_level_range {
HNS3_FLOW_LOW = 0,
@@ -607,6 +607,8 @@ static inline bool hns3_nic_resetting(struct net_device *netdev)

#define ring_to_dev(ring) ((ring)->dev)

+#define ring_to_netdev(ring) ((ring)->tqp_vector->napi.dev)
+
#define ring_to_dma_dir(ring) (HNAE3_IS_TX_RING(ring) ? \
DMA_TO_DEVICE : DMA_FROM_DEVICE)

--
2.7.4
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