提交 92bf2008 编写于 作者: T Tino Reichardt 提交者: David S. Miller

net: via-rhine: add BQL support

Add Byte Queue Limits (BQL) support to via-rhine driver.

[edumazet] tweaked patch and changed TX_RING_SIZE from 16 to 64
Signed-off-by: NTino Reichardt <milky-kernel@mcmilk.de>
Tested-by: NJamie Gloudon <jamie.gloudon@gmail.com>
Signed-off-by: NEric Dumazet <edumazet@google.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
上级 49e64dcd
master alk-4.19.24 alk-4.19.30 alk-4.19.34 alk-4.19.36 alk-4.19.43 alk-4.19.48 alk-4.19.57 ck-4.19.67 ck-4.19.81 ck-4.19.91 github/fork/deepanshu1422/fix-typo-in-comment github/fork/haosdent/fix-typo linux-next v4.19.91 v4.19.90 v4.19.89 v4.19.88 v4.19.87 v4.19.86 v4.19.85 v4.19.84 v4.19.83 v4.19.82 v4.19.81 v4.19.80 v4.19.79 v4.19.78 v4.19.77 v4.19.76 v4.19.75 v4.19.74 v4.19.73 v4.19.72 v4.19.71 v4.19.70 v4.19.69 v4.19.68 v4.19.67 v4.19.66 v4.19.65 v4.19.64 v4.19.63 v4.19.62 v4.19.61 v4.19.60 v4.19.59 v4.19.58 v4.19.57 v4.19.56 v4.19.55 v4.19.54 v4.19.53 v4.19.52 v4.19.51 v4.19.50 v4.19.49 v4.19.48 v4.19.47 v4.19.46 v4.19.45 v4.19.44 v4.19.43 v4.19.42 v4.19.41 v4.19.40 v4.19.39 v4.19.38 v4.19.37 v4.19.36 v4.19.35 v4.19.34 v4.19.33 v4.19.32 v4.19.31 v4.19.30 v4.19.29 v4.19.28 v4.19.27 v4.19.26 v4.19.25 v4.19.24 v4.19.23 v4.19.22 v4.19.21 v4.19.20 v4.19.19 v4.19.18 v4.19.17 v4.19.16 v4.19.15 v4.19.14 v4.19.13 v4.19.12 v4.19.11 v4.19.10 v4.19.9 v4.19.8 v4.19.7 v4.19.6 v4.19.5 v4.19.4 v4.19.3 v4.19.2 v4.19.1 v4.19 v4.19-rc8 v4.19-rc7 v4.19-rc6 v4.19-rc5 v4.19-rc4 v4.19-rc3 v4.19-rc2 v4.19-rc1 ck-release-21 ck-release-20 ck-release-19.2 ck-release-19.1 ck-release-19 ck-release-18 ck-release-17.2 ck-release-17.1 ck-release-17 ck-release-16 ck-release-15.1 ck-release-15 ck-release-14 ck-release-13.2 ck-release-13 ck-release-12 ck-release-11 ck-release-10 ck-release-9 ck-release-7 alk-release-15 alk-release-14 alk-release-13.2 alk-release-13 alk-release-12 alk-release-11 alk-release-10 alk-release-9 alk-release-7
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......@@ -70,12 +70,14 @@ static const int multicast_filter_limit = 32;
/* Operational parameters that are set at compile time. */
/* Keep the ring sizes a power of two for compile efficiency.
The compiler will convert <unsigned>'%'<2^N> into a bit mask.
Making the Tx ring too large decreases the effectiveness of channel
bonding and packet priority.
There are no ill effects from too-large receive rings. */
#define TX_RING_SIZE 16
#define TX_QUEUE_LEN 10 /* Limit ring entries actually used. */
* The compiler will convert <unsigned>'%'<2^N> into a bit mask.
* Making the Tx ring too large decreases the effectiveness of channel
* bonding and packet priority.
* With BQL support, we can increase TX ring safely.
* There are no ill effects from too-large receive rings.
*/
#define TX_RING_SIZE 64
#define TX_QUEUE_LEN (TX_RING_SIZE - 6) /* Limit ring entries actually used. */
#define RX_RING_SIZE 64
/* Operational parameters that usually are not changed. */
......@@ -1295,6 +1297,7 @@ static void alloc_tbufs(struct net_device* dev)
}
rp->tx_ring[i-1].next_desc = cpu_to_le32(rp->tx_ring_dma);
netdev_reset_queue(dev);
}
static void free_tbufs(struct net_device* dev)
......@@ -1795,6 +1798,7 @@ static netdev_tx_t rhine_start_tx(struct sk_buff *skb,
else
rp->tx_ring[entry].tx_status = 0;
netdev_sent_queue(dev, skb->len);
/* lock eth irq */
wmb();
rp->tx_ring[entry].tx_status |= cpu_to_le32(DescOwn);
......@@ -1863,6 +1867,8 @@ static void rhine_tx(struct net_device *dev)
struct rhine_private *rp = netdev_priv(dev);
struct device *hwdev = dev->dev.parent;
int txstatus = 0, entry = rp->dirty_tx % TX_RING_SIZE;
unsigned int pkts_compl = 0, bytes_compl = 0;
struct sk_buff *skb;
/* find and cleanup dirty tx descriptors */
while (rp->dirty_tx != rp->cur_tx) {
......@@ -1871,6 +1877,7 @@ static void rhine_tx(struct net_device *dev)
entry, txstatus);
if (txstatus & DescOwn)
break;
skb = rp->tx_skbuff[entry];
if (txstatus & 0x8000) {
netif_dbg(rp, tx_done, dev,
"Transmit error, Tx status %08x\n", txstatus);
......@@ -1899,7 +1906,7 @@ static void rhine_tx(struct net_device *dev)
(txstatus >> 3) & 0xF, txstatus & 0xF);
u64_stats_update_begin(&rp->tx_stats.syncp);
rp->tx_stats.bytes += rp->tx_skbuff[entry]->len;
rp->tx_stats.bytes += skb->len;
rp->tx_stats.packets++;
u64_stats_update_end(&rp->tx_stats.syncp);
}
......@@ -1907,13 +1914,17 @@ static void rhine_tx(struct net_device *dev)
if (rp->tx_skbuff_dma[entry]) {
dma_unmap_single(hwdev,
rp->tx_skbuff_dma[entry],
rp->tx_skbuff[entry]->len,
skb->len,
DMA_TO_DEVICE);
}
dev_consume_skb_any(rp->tx_skbuff[entry]);
bytes_compl += skb->len;
pkts_compl++;
dev_consume_skb_any(skb);
rp->tx_skbuff[entry] = NULL;
entry = (++rp->dirty_tx) % TX_RING_SIZE;
}
netdev_completed_queue(dev, pkts_compl, bytes_compl);
if ((rp->cur_tx - rp->dirty_tx) < TX_QUEUE_LEN - 4)
netif_wake_queue(dev);
}
......
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