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