[ar71xx] ag71xx driver: store descriptor pointers in ag71xx_buf

[openwrt.git] / target / linux / ar71xx / files / drivers / net / ag71xx / ag71xx_main.c

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 (file)
--- 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;