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Merge branch 'r8169-xmit_more'

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Heiner Kallweit says:

====================
r8169: make use of xmit_more and __netdev_sent_queue

This series adds helper __netdev_sent_queue to the core and makes use
of it in the r8169 driver.

Heiner Kallweit (2):
  net: core: add __netdev_sent_queue as variant of __netdev_tx_sent_queue
  r8169: make use of xmit_more and __netdev_sent_queue

v2:
- fix minor style issue
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2018-11-25 10:18:14 -08:00
commit a1f2d60aaf
2 changed files with 18 additions and 11 deletions
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21
drivers/net/ethernet/realtek/r8169.c
View File

@ -6069,6 +6069,7 @@ static netdev_tx_t rtl8169_start_xmit(struct sk_buff *skb,
struct device *d = tp_to_dev(tp);
dma_addr_t mapping;
u32 opts[2], len;
bool stop_queue;
int frags;
if (unlikely(!rtl_tx_slots_avail(tp, skb_shinfo(skb)->nr_frags))) {
@ -6110,8 +6111,6 @@ static netdev_tx_t rtl8169_start_xmit(struct sk_buff *skb,
txd->opts2 = cpu_to_le32(opts[1]);
netdev_sent_queue(dev, skb->len);
skb_tx_timestamp(skb);
/* Force memory writes to complete before releasing descriptor */
@ -6124,16 +6123,16 @@ static netdev_tx_t rtl8169_start_xmit(struct sk_buff *skb,
tp->cur_tx += frags + 1;
RTL_W8(tp, TxPoll, NPQ);
mmiowb();
if (!rtl_tx_slots_avail(tp, MAX_SKB_FRAGS)) {
/* Avoid wrongly optimistic queue wake-up: rtl_tx thread must
* not miss a ring update when it notices a stopped queue.
*/
smp_wmb();
stop_queue = !rtl_tx_slots_avail(tp, MAX_SKB_FRAGS);
if (unlikely(stop_queue))
netif_stop_queue(dev);
if (__netdev_sent_queue(dev, skb->len, skb->xmit_more)) {
RTL_W8(tp, TxPoll, NPQ);
mmiowb();
}
if (unlikely(stop_queue)) {
/* Sync with rtl_tx:
* - publish queue status and cur_tx ring index (write barrier)
* - refresh dirty_tx ring index (read barrier).

8
include/linux/netdevice.h
View File

@ -3226,6 +3226,14 @@ static inline void netdev_sent_queue(struct net_device *dev, unsigned int bytes)
netdev_tx_sent_queue(netdev_get_tx_queue(dev, 0), bytes);
}
static inline bool __netdev_sent_queue(struct net_device *dev,
unsigned int bytes,
bool xmit_more)
{
return __netdev_tx_sent_queue(netdev_get_tx_queue(dev, 0), bytes,
xmit_more);
}
static inline void netdev_tx_completed_queue(struct netdev_queue *dev_queue,
unsigned int pkts, unsigned int bytes)
{