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author | Alexey Brodkin <Alexey.Brodkin@synopsys.com> | 2013-06-26 07:49:26 (GMT) |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2013-06-26 08:35:44 (GMT) |
commit | a4a1139b242f03dfb8a5d7a86fa674bda1cf60b2 (patch) | |
tree | b3778e33ba3fb380727aaa42653f6e9f7971d1a2 /drivers/net/ethernet/arc/emac_main.c | |
parent | 8599b52e14a1611dcb563289421bee76751f1d53 (diff) | |
download | linux-a4a1139b242f03dfb8a5d7a86fa674bda1cf60b2.tar.xz |
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>
Diffstat (limited to 'drivers/net/ethernet/arc/emac_main.c')
-rw-r--r-- | drivers/net/ethernet/arc/emac_main.c | 65 |
1 files changed, 39 insertions, 26 deletions
diff --git a/drivers/net/ethernet/arc/emac_main.c b/drivers/net/ethernet/arc/emac_main.c index 20345f6..f1b121e 100644 --- a/drivers/net/ethernet/arc/emac_main.c +++ b/drivers/net/ethernet/arc/emac_main.c @@ -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; + + 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); - priv->rx_buff[i].skb = skb; - bd->data = cpu_to_le32(skb->data); + 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(); |