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authorGabor Juhos <juhosg@openwrt.org>2009-07-13 11:38:37 +0000
committerGabor Juhos <juhosg@openwrt.org>2009-07-13 11:38:37 +0000
commit82a084680a527039a3fda555131919cc29a498d7 (patch)
tree2d56a9be56dc15e072105d58ee4f30382af7d122 /target/linux/ar71xx
parent091e02823996bd67001eb3680d999804cb82099f (diff)
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ag71xx driver: store descriptor pointers in ag71xx_buf
SVN-Revision: 16824
Diffstat (limited to 'target/linux/ar71xx')
-rw-r--r--target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx.h5
-rw-r--r--target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_main.c49
2 files changed, 31 insertions, 23 deletions
diff --git a/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx.h b/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx.h
index 843fc4c..ca328e3 100644
--- a/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx.h
+++ b/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx.h
@@ -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;
diff --git a/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_main.c b/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_main.c
index 9b96f3d..6302bf6 100644
--- a/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_main.c
+++ b/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_main.c
@@ -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;