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arc_emac: fix compile-time errors & warnings on PPC64 

As reported by "kbuild test robot" there were some errors and warnings
on attempt to build kernel with "make ARCH=powerpc allmodconfig".

And this patch addresses both errors and warnings.
Below is a list of introduced changes:
1. Fix compile-time errors (misspellings in "dma_unmap_single") on PPC.
2. Use DMA address instead of "skb->data" as a pointer to data buffer.
This fixed warnings on pointer to int conversion on 64-bit systems.
3. Re-implemented initial allocation of Rx buffers in "arc_emac_open" in
the same way they're re-allocated during operation (receiving packets).
So once again DMA address could be used instead of "skb->data".
4. Explicitly use EMAC_BUFFER_SIZE for Rx buffers allocation.

Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>

Cc: netdev@vger.kernel.org
Cc: Andy Shevchenko <andy.shevchenko@gmail.com>
Cc: Francois Romieu <romieu@fr.zoreil.com>
Cc: Joe Perches <joe@perches.com>
Cc: Vineet Gupta <vgupta@synopsys.com>
Cc: Mischa Jonker <mjonker@synopsys.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Grant Likely <grant.likely@linaro.org>
Cc: Rob Herring <rob.herring@calxeda.com>
Cc: Paul Gortmaker <paul.gortmaker@windriver.com>
Cc: linux-kernel@vger.kernel.org
Cc: devicetree-discuss@lists.ozlabs.org
Cc: Florian Fainelli <florian@openwrt.org>
Cc: David Laight <david.laight@aculab.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Alexey Brodkin 2013-06-26 11:49:26 +04:00 committed by David S. Miller
parent 8599b52e14
commit a4a1139b24
1 changed files with 39 additions and 26 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

65
drivers/net/ethernet/arc/emac_main.c
View File

@ -171,8 +171,8 @@ static void arc_emac_tx_clean(struct net_device *ndev)
stats->tx_bytes += skb->len;
}
dma_unmap_single(&ndev->dev, dma_unmap_addr(&tx_buff, addr),
dma_unmap_len(&tx_buff, len), DMA_TO_DEVICE);
dma_unmap_single(&ndev->dev, dma_unmap_addr(tx_buff, addr),
dma_unmap_len(tx_buff, len), DMA_TO_DEVICE);
/* return the sk_buff to system */
dev_kfree_skb_irq(skb);
@ -204,7 +204,6 @@ static int arc_emac_rx(struct net_device *ndev, int budget)
struct net_device_stats *stats = &priv->stats;
struct buffer_state *rx_buff = &priv->rx_buff[*last_rx_bd];
struct arc_emac_bd *rxbd = &priv->rxbd[*last_rx_bd];
unsigned int buflen = EMAC_BUFFER_SIZE;
unsigned int pktlen, info = le32_to_cpu(rxbd->info);
struct sk_buff *skb;
dma_addr_t addr;
@ -226,7 +225,7 @@ static int arc_emac_rx(struct net_device *ndev, int budget)
netdev_err(ndev, "incomplete packet received\n");
/* Return ownership to EMAC */
rxbd->info = cpu_to_le32(FOR_EMAC | buflen);
rxbd->info = cpu_to_le32(FOR_EMAC | EMAC_BUFFER_SIZE);
stats->rx_errors++;
stats->rx_length_errors++;
continue;
@ -240,11 +239,12 @@ static int arc_emac_rx(struct net_device *ndev, int budget)
skb->dev = ndev;
skb->protocol = eth_type_trans(skb, ndev);
dma_unmap_single(&ndev->dev, dma_unmap_addr(&rx_buff, addr),
dma_unmap_len(&rx_buff, len), DMA_FROM_DEVICE);
dma_unmap_single(&ndev->dev, dma_unmap_addr(rx_buff, addr),
dma_unmap_len(rx_buff, len), DMA_FROM_DEVICE);
/* Prepare the BD for next cycle */
rx_buff->skb = netdev_alloc_skb_ip_align(ndev, buflen);
rx_buff->skb = netdev_alloc_skb_ip_align(ndev,
EMAC_BUFFER_SIZE);
if (unlikely(!rx_buff->skb)) {
stats->rx_errors++;
/* Because receive_skb is below, increment rx_dropped */
@ -256,7 +256,7 @@ static int arc_emac_rx(struct net_device *ndev, int budget)
netif_receive_skb(skb);
addr = dma_map_single(&ndev->dev, (void *)rx_buff->skb->data,
buflen, DMA_FROM_DEVICE);
EMAC_BUFFER_SIZE, DMA_FROM_DEVICE);
if (dma_mapping_error(&ndev->dev, addr)) {
if (net_ratelimit())
netdev_err(ndev, "cannot dma map\n");
@ -264,16 +264,16 @@ static int arc_emac_rx(struct net_device *ndev, int budget)
stats->rx_errors++;
continue;
}
dma_unmap_addr_set(&rx_buff, mapping, addr);
dma_unmap_len_set(&rx_buff, len, buflen);
dma_unmap_addr_set(rx_buff, addr, addr);
dma_unmap_len_set(rx_buff, len, EMAC_BUFFER_SIZE);
rxbd->data = cpu_to_le32(rx_buff->skb->data);
rxbd->data = cpu_to_le32(addr);
/* Make sure pointer to data buffer is set */
wmb();
/* Return ownership to EMAC */
rxbd->info = cpu_to_le32(FOR_EMAC | buflen);
rxbd->info = cpu_to_le32(FOR_EMAC | EMAC_BUFFER_SIZE);
}
return work_done;
@ -376,8 +376,6 @@ static int arc_emac_open(struct net_device *ndev)
{
struct arc_emac_priv *priv = netdev_priv(ndev);
struct phy_device *phy_dev = priv->phy_dev;
struct arc_emac_bd *bd;
struct sk_buff *skb;
int i;
phy_dev->autoneg = AUTONEG_ENABLE;
@ -395,25 +393,40 @@ static int arc_emac_open(struct net_device *ndev)
}
}
priv->last_rx_bd = 0;
/* Allocate and set buffers for Rx BD's */
bd = priv->rxbd;
for (i = 0; i < RX_BD_NUM; i++) {
skb = netdev_alloc_skb_ip_align(ndev, EMAC_BUFFER_SIZE);
if (unlikely(!skb))
dma_addr_t addr;
unsigned int *last_rx_bd = &priv->last_rx_bd;
struct arc_emac_bd *rxbd = &priv->rxbd[*last_rx_bd];
struct buffer_state *rx_buff = &priv->rx_buff[*last_rx_bd];
rx_buff->skb = netdev_alloc_skb_ip_align(ndev,
EMAC_BUFFER_SIZE);
if (unlikely(!rx_buff->skb))
return -ENOMEM;
priv->rx_buff[i].skb = skb;
bd->data = cpu_to_le32(skb->data);
addr = dma_map_single(&ndev->dev, (void *)rx_buff->skb->data,
EMAC_BUFFER_SIZE, DMA_FROM_DEVICE);
if (dma_mapping_error(&ndev->dev, addr)) {
netdev_err(ndev, "cannot dma map\n");
dev_kfree_skb(rx_buff->skb);
return -ENOMEM;
}
dma_unmap_addr_set(rx_buff, addr, addr);
dma_unmap_len_set(rx_buff, len, EMAC_BUFFER_SIZE);
rxbd->data = cpu_to_le32(addr);
/* Make sure pointer to data buffer is set */
wmb();
/* Set ownership to EMAC */
bd->info = cpu_to_le32(FOR_EMAC | EMAC_BUFFER_SIZE);
bd++;
}
/* Return ownership to EMAC */
rxbd->info = cpu_to_le32(FOR_EMAC | EMAC_BUFFER_SIZE);
priv->last_rx_bd = 0;
*last_rx_bd = (*last_rx_bd + 1) % RX_BD_NUM;
}
/* Clean Tx BD's */
memset(priv->txbd, 0, TX_RING_SZ);
@ -543,11 +556,11 @@ static int arc_emac_tx(struct sk_buff *skb, struct net_device *ndev)
dev_kfree_skb(skb);
return NETDEV_TX_OK;
}
dma_unmap_addr_set(&priv->tx_buff[*txbd_curr], mapping, addr);
dma_unmap_addr_set(&priv->tx_buff[*txbd_curr], addr, addr);
dma_unmap_len_set(&priv->tx_buff[*txbd_curr], len, len);
priv->tx_buff[*txbd_curr].skb = skb;
priv->txbd[*txbd_curr].data = cpu_to_le32(skb->data);
priv->txbd[*txbd_curr].data = cpu_to_le32(addr);
/* Make sure pointer to data buffer is set */
wmb();