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ag71xx driver: store descriptor pointers in ag71xx_buf

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SVN-Revision: 16824
This commit is contained in:
Gabor Juhos 2009-07-13 11:38:37 +00:00
parent 091e028239
commit 82a084680a
2 changed files with 31 additions and 23 deletions
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5
target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx.h
View File

@ -38,7 +38,7 @@
#define ETH_FCS_LEN 4
#define AG71XX_DRV_NAME "ag71xx"
#define AG71XX_DRV_VERSION "0.5.21"
#define AG71XX_DRV_VERSION "0.5.22"
#define AG71XX_NAPI_WEIGHT 64
#define AG71XX_OOM_REFILL (1 + HZ/10)
@ -89,11 +89,12 @@ struct ag71xx_desc {
struct ag71xx_buf {
struct sk_buff *skb;
struct ag71xx_desc *desc;
};
struct ag71xx_ring {
struct ag71xx_buf *buf;
struct ag71xx_desc *descs;
struct ag71xx_desc *descs_cpu;
dma_addr_t descs_dma;
unsigned int curr;
unsigned int dirty;

49
target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_main.c
View File

@ -85,19 +85,21 @@ static void ag71xx_ring_free(struct ag71xx_ring *ring)
{
kfree(ring->buf);
if (ring->descs)
dma_free_coherent(NULL, ring->size * sizeof(*ring->descs),
ring->descs, ring->descs_dma);
if (ring->descs_cpu)
dma_free_coherent(NULL, ring->size * sizeof(struct ag71xx_desc),
ring->descs_cpu, ring->descs_dma);
}
static int ag71xx_ring_alloc(struct ag71xx_ring *ring, unsigned int size)
{
int err;
int i;
ring->descs = dma_alloc_coherent(NULL, size * sizeof(*ring->descs),
&ring->descs_dma,
GFP_ATOMIC);
if (!ring->descs) {
ring->descs_cpu = dma_alloc_coherent(NULL,
size * sizeof(struct ag71xx_desc),
&ring->descs_dma,
GFP_ATOMIC);
if (!ring->descs_cpu) {
err = -ENOMEM;
goto err;
}
@ -110,6 +112,11 @@ static int ag71xx_ring_alloc(struct ag71xx_ring *ring, unsigned int size)
goto err;
}
for (i = 0; i < size; i++) {
struct ag71xx_desc *descs = (struct ag71xx_desc *) ring->descs_cpu;
ring->buf[i].desc = &descs[i];
}
return 0;
err:
@ -124,8 +131,8 @@ static void ag71xx_ring_tx_clean(struct ag71xx *ag)
while (ring->curr != ring->dirty) {
u32 i = ring->dirty % AG71XX_TX_RING_SIZE;
if (!ag71xx_desc_empty(&ring->descs[i])) {
ring->descs[i].ctrl = 0;
if (!ag71xx_desc_empty(ring->buf[i].desc)) {
ring->buf[i].desc->ctrl = 0;
dev->stats.tx_errors++;
}
@ -148,10 +155,10 @@ static void ag71xx_ring_tx_init(struct ag71xx *ag)
int i;
for (i = 0; i < AG71XX_TX_RING_SIZE; i++) {
ring->descs[i].next = (u32) (ring->descs_dma +
sizeof(*ring->descs) * ((i + 1) % AG71XX_TX_RING_SIZE));
ring->buf[i].desc->next = (u32) (ring->descs_dma +
sizeof(struct ag71xx_desc) * ((i + 1) % AG71XX_TX_RING_SIZE));
ring->descs[i].ctrl = DESC_EMPTY;
ring->buf[i].desc->ctrl = DESC_EMPTY;
ring->buf[i].skb = NULL;
}
@ -184,8 +191,8 @@ static int ag71xx_ring_rx_init(struct ag71xx *ag)
ret = 0;
for (i = 0; i < AG71XX_RX_RING_SIZE; i++)
ring->descs[i].next = (u32) (ring->descs_dma +
sizeof(*ring->descs) * ((i + 1) % AG71XX_RX_RING_SIZE));
ring->buf[i].desc->next = (u32) (ring->descs_dma +
sizeof(struct ag71xx_desc) * ((i + 1) % AG71XX_RX_RING_SIZE));
for (i = 0; i < AG71XX_RX_RING_SIZE; i++) {
struct sk_buff *skb;
@ -203,8 +210,8 @@ static int ag71xx_ring_rx_init(struct ag71xx *ag)
skb_reserve(skb, AG71XX_RX_PKT_RESERVE);
ring->buf[i].skb = skb;
ring->descs[i].data = virt_to_phys(skb->data);
ring->descs[i].ctrl = DESC_EMPTY;
ring->buf[i].desc->data = virt_to_phys(skb->data);
ring->buf[i].desc->ctrl = DESC_EMPTY;
}
/* flush descriptors */
@ -241,10 +248,10 @@ static int ag71xx_ring_rx_refill(struct ag71xx *ag)
skb->dev = ag->dev;
ring->buf[i].skb = skb;
ring->descs[i].data = virt_to_phys(skb->data);
ring->buf[i].desc->data = virt_to_phys(skb->data);
}
ring->descs[i].ctrl = DESC_EMPTY;
ring->buf[i].desc->ctrl = DESC_EMPTY;
count++;
}
@ -462,7 +469,7 @@ static int ag71xx_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
int i;
i = ring->curr % AG71XX_TX_RING_SIZE;
desc = &ring->descs[i];
desc = ring->buf[i].desc;
if (!ag71xx_desc_empty(desc))
goto err_drop;
@ -586,7 +593,7 @@ static void ag71xx_tx_packets(struct ag71xx *ag)
sent = 0;
while (ring->dirty != ring->curr) {
unsigned int i = ring->dirty % AG71XX_TX_RING_SIZE;
struct ag71xx_desc *desc = &ring->descs[i];
struct ag71xx_desc *desc = ring->buf[i].desc;
struct sk_buff *skb = ring->buf[i].skb;
if (!ag71xx_desc_empty(desc))
@ -622,7 +629,7 @@ static int ag71xx_rx_packets(struct ag71xx *ag, int limit)
while (done < limit) {
unsigned int i = ring->curr % AG71XX_RX_RING_SIZE;
struct ag71xx_desc *desc = &ring->descs[i];
struct ag71xx_desc *desc = ring->buf[i].desc;
struct sk_buff *skb;
int pktlen;