@@ -47,6 +47,7 @@ unsigned int stmmac_jumbo_frm(void *p, struct sk_buff *skb, int csum)
desc->des2 = dma_map_single(priv->device, skb->data,
bmax, DMA_TO_DEVICE);
+ priv->tx_skbuff_dma[entry] = desc->des2;
priv->hw->desc->prepare_tx_desc(desc, 1, bmax, csum);
while (len != 0) {
@@ -57,6 +58,7 @@ unsigned int stmmac_jumbo_frm(void *p, struct sk_buff *skb, int csum)
desc->des2 = dma_map_single(priv->device,
(skb->data + bmax * i),
bmax, DMA_TO_DEVICE);
+ priv->tx_skbuff_dma[entry] = desc->des2;
priv->hw->desc->prepare_tx_desc(desc, 0, bmax,
csum);
priv->hw->desc->set_tx_owner(desc);
@@ -67,6 +69,7 @@ unsigned int stmmac_jumbo_frm(void *p, struct sk_buff *skb, int csum)
desc->des2 = dma_map_single(priv->device,
(skb->data + bmax * i), len,
DMA_TO_DEVICE);
+ priv->tx_skbuff_dma[entry] = desc->des2;
priv->hw->desc->prepare_tx_desc(desc, 0, len,
csum);
priv->hw->desc->set_tx_owner(desc);
@@ -48,6 +48,7 @@ static unsigned int stmmac_jumbo_frm(void *p, struct sk_buff *skb, int csum)
desc->des2 = dma_map_single(priv->device, skb->data,
bmax, DMA_TO_DEVICE);
+ priv->tx_skbuff_dma[entry] = desc->des2;
desc->des3 = desc->des2 + BUF_SIZE_4KiB;
priv->hw->desc->prepare_tx_desc(desc, 1, bmax,
csum);
@@ -57,6 +58,7 @@ static unsigned int stmmac_jumbo_frm(void *p, struct sk_buff *skb, int csum)
desc->des2 = dma_map_single(priv->device, skb->data + bmax,
len, DMA_TO_DEVICE);
+ priv->tx_skbuff_dma[entry] = desc->des2;
desc->des3 = desc->des2 + BUF_SIZE_4KiB;
priv->hw->desc->prepare_tx_desc(desc, 0, len, csum);
wmb();
@@ -65,6 +67,7 @@ static unsigned int stmmac_jumbo_frm(void *p, struct sk_buff *skb, int csum)
} else {
desc->des2 = dma_map_single(priv->device, skb->data,
nopaged_len, DMA_TO_DEVICE);
+ priv->tx_skbuff_dma[entry] = desc->des2;
desc->des3 = desc->des2 + BUF_SIZE_4KiB;
priv->hw->desc->prepare_tx_desc(desc, 1, nopaged_len, csum);
}
@@ -37,6 +37,7 @@ struct stmmac_priv {
struct dma_desc *dma_tx ____cacheline_aligned;
dma_addr_t dma_tx_phy;
struct sk_buff **tx_skbuff;
+ dma_addr_t *tx_skbuff_dma;
unsigned int cur_tx;
unsigned int dirty_tx;
unsigned int dma_tx_size;
@@ -540,6 +540,8 @@ static void init_dma_desc_rings(struct net_device *dev)
sizeof(struct dma_desc),
&priv->dma_rx_phy,
GFP_KERNEL);
+ priv->tx_skbuff_dma = kmalloc_array(txsize, sizeof(dma_addr_t),
+ GFP_KERNEL);
priv->tx_skbuff = kmalloc_array(txsize, sizeof(struct sk_buff *),
GFP_KERNEL);
priv->dma_tx =
@@ -591,6 +593,7 @@ static void init_dma_desc_rings(struct net_device *dev)
/* TX INITIALIZATION */
for (i = 0; i < txsize; i++) {
+ priv->tx_skbuff_dma[i] = 0;
priv->tx_skbuff[i] = NULL;
priv->dma_tx[i].des2 = 0;
}
@@ -638,12 +641,14 @@ static void dma_free_tx_skbufs(struct stmmac_priv *priv)
for (i = 0; i < priv->dma_tx_size; i++) {
if (priv->tx_skbuff[i] != NULL) {
struct dma_desc *p = priv->dma_tx + i;
- if (p->des2)
- dma_unmap_single(priv->device, p->des2,
+ if (priv->tx_skbuff_dma[i])
+ dma_unmap_single(priv->device,
+ priv->tx_skbuff_dma[i],
priv->hw->desc->get_tx_len(p),
DMA_TO_DEVICE);
dev_kfree_skb_any(priv->tx_skbuff[i]);
priv->tx_skbuff[i] = NULL;
+ priv->tx_skbuff_dma[i] = 0;
}
}
}
@@ -664,6 +669,7 @@ static void free_dma_desc_resources(struct stmmac_priv *priv)
priv->dma_rx, priv->dma_rx_phy);
kfree(priv->rx_skbuff_dma);
kfree(priv->rx_skbuff);
+ kfree(priv->tx_skbuff_dma);
kfree(priv->tx_skbuff);
}
@@ -730,10 +736,13 @@ static void stmmac_tx_clean(struct stmmac_priv *priv)
TX_DBG("%s: curr %d, dirty %d\n", __func__,
priv->cur_tx, priv->dirty_tx);
- if (likely(p->des2))
- dma_unmap_single(priv->device, p->des2,
+ if (likely(priv->tx_skbuff_dma[entry])) {
+ dma_unmap_single(priv->device,
+ priv->tx_skbuff_dma[entry],
priv->hw->desc->get_tx_len(p),
DMA_TO_DEVICE);
+ priv->tx_skbuff_dma[entry] = 0;
+ }
priv->hw->ring->clean_desc3(p);
if (likely(skb != NULL)) {
@@ -1249,7 +1258,8 @@ static netdev_tx_t stmmac_xmit(struct sk_buff *skb, struct net_device *dev)
desc = priv->dma_tx + entry;
} else {
desc->des2 = dma_map_single(priv->device, skb->data,
- nopaged_len, DMA_TO_DEVICE);
+ nopaged_len, DMA_TO_DEVICE);
+ priv->tx_skbuff_dma[entry] = desc->des2;
priv->hw->desc->prepare_tx_desc(desc, 1, nopaged_len,
csum_insertion);
}
@@ -1264,6 +1274,7 @@ static netdev_tx_t stmmac_xmit(struct sk_buff *skb, struct net_device *dev)
TX_DBG("\t[entry %d] segment len: %d\n", entry, len);
desc->des2 = skb_frag_dma_map(priv->device, frag, 0, len,
DMA_TO_DEVICE);
+ priv->tx_skbuff_dma[entry] = desc->des2;
priv->tx_skbuff[entry] = NULL;
priv->hw->desc->prepare_tx_desc(desc, 0, len, csum_insertion);
wmb();