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authorGabor Juhos <juhosg@openwrt.org>2012-02-26 10:54:12 +0000
committerGabor Juhos <juhosg@openwrt.org>2012-02-26 10:54:12 +0000
commit100f76a010efdbc3d41a356a797caed90c1dd8ab (patch)
tree9ff23a03957e9119607a4f4b400249ddd9f949b8 /target
parent32e7b1c7d96090f666e8bd633a4a9d5f23d429e5 (diff)
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ramips: raeth: add rx_info structure
This helps to reduce code size on RX path: add/remove: 0/0 grow/shrink: 3/1 up/down: 68/-56 (12) function old new delta ramips_eth_open 1104 1144 +40 ramips_ring_free 212 232 +20 ramips_eth_stop 400 408 +8 ramips_eth_rx_hw 648 592 -56 SVN-Revision: 30732
Diffstat (limited to 'target')
-rw-r--r--target/linux/ramips/files/drivers/net/ethernet/ramips/ramips_eth.h10
-rw-r--r--target/linux/ramips/files/drivers/net/ethernet/ramips/ramips_main.c71
2 files changed, 57 insertions, 24 deletions
diff --git a/target/linux/ramips/files/drivers/net/ethernet/ramips/ramips_eth.h b/target/linux/ramips/files/drivers/net/ethernet/ramips/ramips_eth.h
index eaed4c7..5f40fe1 100644
--- a/target/linux/ramips/files/drivers/net/ethernet/ramips/ramips_eth.h
+++ b/target/linux/ramips/files/drivers/net/ethernet/ramips/ramips_eth.h
@@ -218,6 +218,13 @@ struct raeth_tx_info {
struct sk_buff *tx_skb;
};
+struct raeth_rx_info {
+ struct ramips_rx_dma *rx_desc;
+ struct sk_buff *rx_skb;
+ dma_addr_t rx_dma;
+ unsigned int pad;
+};
+
struct raeth_int_stats {
unsigned long rx_delayed;
unsigned long tx_delayed;
@@ -246,11 +253,10 @@ struct raeth_debug {
struct raeth_priv
{
+ struct raeth_rx_info *rx_info;
dma_addr_t rx_desc_dma;
struct tasklet_struct rx_tasklet;
struct ramips_rx_dma *rx;
- struct sk_buff *rx_skb[NUM_RX_DESC];
- dma_addr_t rx_dma[NUM_RX_DESC];
struct raeth_tx_info *tx_info;
dma_addr_t tx_desc_dma;
diff --git a/target/linux/ramips/files/drivers/net/ethernet/ramips/ramips_main.c b/target/linux/ramips/files/drivers/net/ethernet/ramips/ramips_main.c
index fef9fa2..60001e3 100644
--- a/target/linux/ramips/files/drivers/net/ethernet/ramips/ramips_main.c
+++ b/target/linux/ramips/files/drivers/net/ethernet/ramips/ramips_main.c
@@ -134,14 +134,20 @@ ramips_ring_setup(struct raeth_priv *re)
memset(re->rx, 0, len);
for (i = 0; i < NUM_RX_DESC; i++) {
+ struct raeth_rx_info *rxi;
+ struct ramips_rx_dma *rxd;
dma_addr_t dma_addr;
- BUG_ON(re->rx_skb[i] == NULL);
- dma_addr = dma_map_single(&re->netdev->dev, re->rx_skb[i]->data,
+ rxd = &re->rx[i];
+ rxi = &re->rx_info[i];
+ BUG_ON(rxi->rx_skb == NULL);
+ dma_addr = dma_map_single(&re->netdev->dev, rxi->rx_skb->data,
MAX_RX_LENGTH, DMA_FROM_DEVICE);
- re->rx_dma[i] = dma_addr;
- re->rx[i].rxd1 = (unsigned int) dma_addr;
- re->rx[i].rxd2 = RX_DMA_LSO;
+ rxi->rx_dma = dma_addr;
+ rxi->rx_desc = rxd;
+
+ rxd->rxd1 = (unsigned int) dma_addr;
+ rxd->rxd2 = RX_DMA_LSO;
}
/* flush descriptors */
@@ -153,10 +159,14 @@ ramips_ring_cleanup(struct raeth_priv *re)
{
int i;
- for (i = 0; i < NUM_RX_DESC; i++)
- if (re->rx_skb[i])
- dma_unmap_single(&re->netdev->dev, re->rx_dma[i],
+ for (i = 0; i < NUM_RX_DESC; i++) {
+ struct raeth_rx_info *rxi;
+
+ rxi = &re->rx_info[i];
+ if (rxi->rx_skb)
+ dma_unmap_single(&re->netdev->dev, rxi->rx_dma,
MAX_RX_LENGTH, DMA_FROM_DEVICE);
+ }
for (i = 0; i < NUM_TX_DESC; i++) {
struct raeth_tx_info *txi;
@@ -553,9 +563,16 @@ ramips_ring_free(struct raeth_priv *re)
int len;
int i;
- for (i = 0; i < NUM_RX_DESC; i++)
- if (re->rx_skb[i])
- dev_kfree_skb_any(re->rx_skb[i]);
+ if (re->rx_info) {
+ for (i = 0; i < NUM_RX_DESC; i++) {
+ struct raeth_rx_info *rxi;
+
+ rxi = &re->rx_info[i];
+ if (rxi->rx_skb)
+ dev_kfree_skb_any(rxi->rx_skb);
+ }
+ kfree(re->rx_info);
+ }
if (re->rx) {
len = NUM_RX_DESC * sizeof(struct ramips_rx_dma);
@@ -584,6 +601,11 @@ ramips_ring_alloc(struct raeth_priv *re)
if (!re->tx_info)
goto err_cleanup;
+ re->rx_info = kzalloc(NUM_RX_DESC * sizeof(struct raeth_rx_info),
+ GFP_ATOMIC);
+ if (!re->rx_info)
+ goto err_cleanup;
+
/* allocate tx ring */
len = NUM_TX_DESC * sizeof(struct ramips_tx_dma);
re->tx = dma_alloc_coherent(&re->netdev->dev, len,
@@ -605,7 +627,7 @@ ramips_ring_alloc(struct raeth_priv *re)
if (!skb)
goto err_cleanup;
- re->rx_skb[i] = skb;
+ re->rx_info[i].rx_skb = skb;
}
return 0;
@@ -696,23 +718,27 @@ ramips_eth_rx_hw(unsigned long ptr)
int max_rx = 16;
while (max_rx) {
+ struct raeth_rx_info *rxi;
+ struct ramips_rx_dma *rxd;
struct sk_buff *rx_skb, *new_skb;
int pktlen;
rx = (ramips_fe_rr(RAMIPS_RX_CALC_IDX0) + 1) % NUM_RX_DESC;
- if (!(re->rx[rx].rxd2 & RX_DMA_DONE))
+
+ rxi = &re->rx_info[rx];
+ rxd = rxi->rx_desc;
+ if (!(rxd->rxd2 & RX_DMA_DONE))
break;
- max_rx--;
- rx_skb = re->rx_skb[rx];
- pktlen = RX_DMA_PLEN0(re->rx[rx].rxd2);
+ rx_skb = rxi->rx_skb;
+ pktlen = RX_DMA_PLEN0(rxd->rxd2);
new_skb = ramips_alloc_skb(re);
/* Reuse the buffer on allocation failures */
if (new_skb) {
dma_addr_t dma_addr;
- dma_unmap_single(&re->netdev->dev, re->rx_dma[rx],
+ dma_unmap_single(&re->netdev->dev, rxi->rx_dma,
MAX_RX_LENGTH, DMA_FROM_DEVICE);
skb_put(rx_skb, pktlen);
@@ -723,21 +749,22 @@ ramips_eth_rx_hw(unsigned long ptr)
dev->stats.rx_bytes += pktlen;
netif_rx(rx_skb);
- re->rx_skb[rx] = new_skb;
+ rxi->rx_skb = new_skb;
dma_addr = dma_map_single(&re->netdev->dev,
new_skb->data,
MAX_RX_LENGTH,
DMA_FROM_DEVICE);
- re->rx_dma[rx] = dma_addr;
- re->rx[rx].rxd1 = (unsigned int) dma_addr;
+ rxi->rx_dma = dma_addr;
+ rxd->rxd1 = (unsigned int) dma_addr;
+ wmb();
} else {
dev->stats.rx_dropped++;
}
- re->rx[rx].rxd2 &= ~RX_DMA_DONE;
- wmb();
+ rxd->rxd2 = RX_DMA_LSO;
ramips_fe_wr(rx, RAMIPS_RX_CALC_IDX0);
+ max_rx--;
}
if (max_rx == 0)