/*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
+ * the Free Software Foundation; version 2 of the License
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
*/
#include <linux/module.h>
-#include <linux/version.h>
#include <linux/kernel.h>
#include <linux/types.h>
-#include <linux/pci.h>
+#include <linux/dma-mapping.h>
#include <linux/init.h>
#include <linux/skbuff.h>
-#include <linux/if_vlan.h>
-#include <linux/if_ether.h>
+#include <linux/etherdevice.h>
#include <linux/platform_device.h>
-#include <asm/uaccess.h>
-#include <net/sock.h>
-#include <asm/uaccess.h>
-#include <eth.h>
+#include <ramips_eth_platform.h>
+#include "ramips_eth.h"
#define TX_TIMEOUT (20 * HZ / 100)
-#define MAX_RX_LENGTH 1500
+#define MAX_RX_LENGTH 1600
#ifdef CONFIG_RALINK_RT305X
#include "ramips_esw.c"
#endif
+#define phys_to_bus(a) (a & 0x1FFFFFFF)
+
static struct net_device * ramips_dev;
static void __iomem *ramips_fe_base = 0;
return __raw_readl(ramips_fe_base + reg);
}
+static void
+ramips_cleanup_dma(struct raeth_priv *re)
+{
+ int i;
+
+ for (i = 0; i < NUM_RX_DESC; i++)
+ if (re->rx_skb[i])
+ dev_kfree_skb_any(re->rx_skb[i]);
+
+ if (re->rx)
+ dma_free_coherent(NULL,
+ NUM_RX_DESC * sizeof(struct ramips_rx_dma),
+ re->rx, re->phy_rx);
+
+ if (re->tx)
+ dma_free_coherent(NULL,
+ NUM_TX_DESC * sizeof(struct ramips_tx_dma),
+ re->tx, re->phy_tx);
+}
+
static int
-ramips_alloc_dma(struct net_device *dev)
+ramips_alloc_dma(struct raeth_priv *re)
{
-#define phys_to_bus(a) (a & 0x1FFFFFFF)
- struct raeth_priv *priv = netdev_priv(dev);
+ int err = -ENOMEM;
int i;
- priv->skb_free_idx = 0;
+ re->skb_free_idx = 0;
/* setup tx ring */
- priv->tx = pci_alloc_consistent(NULL,
- NUM_TX_DESC * sizeof(struct ramips_tx_dma), &priv->phy_tx);
- for(i = 0; i < NUM_TX_DESC; i++)
- {
- memset(&priv->tx[i], 0, sizeof(struct ramips_tx_dma));
- priv->tx[i].txd2 |= TX_DMA_LSO | TX_DMA_DONE;
- priv->tx[i].txd4 &= (TX_DMA_QN_MASK | TX_DMA_PN_MASK);
- priv->tx[i].txd4 |= TX_DMA_QN(3) | TX_DMA_PN(1);
+ re->tx = dma_alloc_coherent(NULL,
+ NUM_TX_DESC * sizeof(struct ramips_tx_dma),
+ &re->phy_tx, GFP_ATOMIC);
+ if (!re->tx)
+ goto err_cleanup;
+
+ memset(re->tx, 0, NUM_TX_DESC * sizeof(struct ramips_tx_dma));
+ for (i = 0; i < NUM_TX_DESC; i++) {
+ re->tx[i].txd2 = TX_DMA_LSO | TX_DMA_DONE;
+ re->tx[i].txd4 = TX_DMA_QN(3) | TX_DMA_PN(1);
}
- ramips_fe_wr(phys_to_bus(priv->phy_tx), RAMIPS_TX_BASE_PTR0);
- ramips_fe_wr(NUM_TX_DESC, RAMIPS_TX_MAX_CNT0);
- ramips_fe_wr(0, RAMIPS_TX_CTX_IDX0);
- ramips_fe_wr(RAMIPS_PST_DTX_IDX0, RAMIPS_PDMA_RST_CFG);
/* setup rx ring */
- priv->rx = pci_alloc_consistent(NULL,
- NUM_RX_DESC * sizeof(struct ramips_rx_dma), &priv->phy_rx);
- memset(priv->rx, 0, sizeof(struct ramips_rx_dma) * NUM_RX_DESC);
- for(i = 0; i < NUM_RX_DESC; i++)
- {
+ re->rx = dma_alloc_coherent(NULL,
+ NUM_RX_DESC * sizeof(struct ramips_rx_dma),
+ &re->phy_rx, GFP_ATOMIC);
+ if (!re->rx)
+ goto err_cleanup;
+
+ memset(re->rx, 0, sizeof(struct ramips_rx_dma) * NUM_RX_DESC);
+ for (i = 0; i < NUM_RX_DESC; i++) {
struct sk_buff *new_skb = dev_alloc_skb(MAX_RX_LENGTH + 2);
- BUG_ON(!new_skb);
+
+ if (!new_skb)
+ goto err_cleanup;
+
skb_reserve(new_skb, 2);
- priv->rx[i].rxd1 =
- dma_map_single(NULL, skb_put(new_skb, 2), MAX_RX_LENGTH + 2,
- PCI_DMA_FROMDEVICE);
- priv->rx[i].rxd2 |= RX_DMA_LSO;
- priv->rx_skb[i] = new_skb;
+ re->rx[i].rxd1 = dma_map_single(NULL,
+ skb_put(new_skb, 2),
+ MAX_RX_LENGTH + 2,
+ DMA_FROM_DEVICE);
+ re->rx[i].rxd2 |= RX_DMA_LSO;
+ re->rx_skb[i] = new_skb;
}
- dma_cache_wback_inv((unsigned long)priv->rx,
- NUM_RX_DESC * (sizeof(struct ramips_rx_dma)));
- ramips_fe_wr(phys_to_bus(priv->phy_rx), RAMIPS_RX_BASE_PTR0);
+ return 0;
+
+ err_cleanup:
+ ramips_cleanup_dma(re);
+ return err;
+}
+
+static void
+ramips_setup_dma(struct raeth_priv *re)
+{
+ ramips_fe_wr(phys_to_bus(re->phy_tx), RAMIPS_TX_BASE_PTR0);
+ ramips_fe_wr(NUM_TX_DESC, RAMIPS_TX_MAX_CNT0);
+ ramips_fe_wr(0, RAMIPS_TX_CTX_IDX0);
+ ramips_fe_wr(RAMIPS_PST_DTX_IDX0, RAMIPS_PDMA_RST_CFG);
+
+ ramips_fe_wr(phys_to_bus(re->phy_rx), RAMIPS_RX_BASE_PTR0);
ramips_fe_wr(NUM_RX_DESC, RAMIPS_RX_MAX_CNT0);
ramips_fe_wr((NUM_RX_DESC - 1), RAMIPS_RX_CALC_IDX0);
ramips_fe_wr(RAMIPS_PST_DRX_IDX0, RAMIPS_PDMA_RST_CFG);
-
- return 0;
}
static int
-ramips_eth_hard_start_xmit(struct sk_buff* skb, struct net_device *dev)
+ramips_eth_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
{
struct raeth_priv *priv = netdev_priv(dev);
unsigned long tx;
unsigned int tx_next;
-
- if(priv->plat->min_pkt_len)
- {
- if(skb->len < priv->plat->min_pkt_len)
- {
- if(skb_padto(skb, priv->plat->min_pkt_len))
- {
- printk(KERN_ERR "ramips_eth: skb_padto failed\n");
- kfree_skb(skb);
- return 0;
- }
- skb_put(skb, priv->plat->min_pkt_len - skb->len);
- }
+ unsigned int mapped_addr;
+ unsigned long flags;
+
+ if (priv->plat->min_pkt_len) {
+ if (skb->len < priv->plat->min_pkt_len) {
+ if (skb_padto(skb, priv->plat->min_pkt_len)) {
+ printk(KERN_ERR
+ "ramips_eth: skb_padto failed\n");
+ kfree_skb(skb);
+ return 0;
+ }
+ skb_put(skb, priv->plat->min_pkt_len - skb->len);
+ }
}
+
dev->trans_start = jiffies;
- dma_cache_wback_inv((unsigned long)skb->data, skb->len);
+ mapped_addr = (unsigned int) dma_map_single(NULL, skb->data, skb->len,
+ DMA_TO_DEVICE);
+ dma_sync_single_for_device(NULL, mapped_addr, skb->len, DMA_TO_DEVICE);
+ spin_lock_irqsave(&priv->page_lock, flags);
tx = ramips_fe_rr(RAMIPS_TX_CTX_IDX0);
- if(tx == NUM_TX_DESC - 1)
+ if (tx == NUM_TX_DESC - 1)
tx_next = 0;
else
tx_next = tx + 1;
- if((priv->tx_skb[tx]== 0) && (priv->tx_skb[tx_next] == 0))
- {
- if(!(priv->tx[tx].txd2 & TX_DMA_DONE))
- {
- kfree_skb(skb);
- dev->stats.tx_dropped++;
- printk(KERN_ERR "%s: dropping\n", dev->name);
- return 0;
- }
- priv->tx[tx].txd1 = virt_to_phys(skb->data);
- priv->tx[tx].txd2 &= ~(TX_DMA_PLEN0_MASK | TX_DMA_DONE);
- priv->tx[tx].txd2 |= TX_DMA_PLEN0(skb->len);
- ramips_fe_wr((tx + 1) % NUM_TX_DESC, RAMIPS_TX_CTX_IDX0);
- dev->stats.tx_packets++;
- dev->stats.tx_bytes += skb->len;
- priv->tx_skb[tx] = skb;
- ramips_fe_wr((tx + 1) % NUM_TX_DESC, RAMIPS_TX_CTX_IDX0);
- } else {
- dev->stats.tx_dropped++;
- kfree_skb(skb);
- }
- return 0;
+
+ if ((priv->tx_skb[tx]) || (priv->tx_skb[tx_next]) ||
+ !(priv->tx[tx].txd2 & TX_DMA_DONE) ||
+ !(priv->tx[tx_next].txd2 & TX_DMA_DONE))
+ goto out;
+
+ priv->tx[tx].txd1 = mapped_addr;
+ priv->tx[tx].txd2 &= ~(TX_DMA_PLEN0_MASK | TX_DMA_DONE);
+ priv->tx[tx].txd2 |= TX_DMA_PLEN0(skb->len);
+ dev->stats.tx_packets++;
+ dev->stats.tx_bytes += skb->len;
+ priv->tx_skb[tx] = skb;
+ wmb();
+ ramips_fe_wr((tx + 1) % NUM_TX_DESC, RAMIPS_TX_CTX_IDX0);
+ spin_unlock_irqrestore(&priv->page_lock, flags);
+ return NETDEV_TX_OK;
+
+ out:
+ spin_unlock_irqrestore(&priv->page_lock, flags);
+ dev->stats.tx_dropped++;
+ kfree_skb(skb);
+ return NETDEV_TX_OK;
}
static void
ramips_eth_rx_hw(unsigned long ptr)
{
- struct net_device *dev = (struct net_device*)ptr;
+ struct net_device *dev = (struct net_device *) ptr;
struct raeth_priv *priv = netdev_priv(dev);
int rx;
int max_rx = 16;
- while(max_rx)
- {
+ while (max_rx) {
struct sk_buff *rx_skb, *new_skb;
rx = (ramips_fe_rr(RAMIPS_RX_CALC_IDX0) + 1) % NUM_RX_DESC;
- if(!(priv->rx[rx].rxd2 & RX_DMA_DONE))
+ if (!(priv->rx[rx].rxd2 & RX_DMA_DONE))
break;
max_rx--;
rx_skb = priv->rx_skb[rx];
rx_skb->len = RX_DMA_PLEN0(priv->rx[rx].rxd2);
- rx_skb->tail = rx_skb->data + rx_skb->len;
rx_skb->dev = dev;
rx_skb->protocol = eth_type_trans(rx_skb, dev);
rx_skb->ip_summed = CHECKSUM_NONE;
dev->stats.rx_bytes += rx_skb->len;
netif_rx(rx_skb);
- new_skb = __dev_alloc_skb(MAX_RX_LENGTH + 2, GFP_DMA | GFP_ATOMIC);
+ new_skb = netdev_alloc_skb(dev, MAX_RX_LENGTH + 2);
priv->rx_skb[rx] = new_skb;
BUG_ON(!new_skb);
skb_reserve(new_skb, 2);
- priv->rx[rx].rxd1 =
- dma_map_single(NULL, new_skb->data, MAX_RX_LENGTH + 2,
- PCI_DMA_FROMDEVICE);
+ priv->rx[rx].rxd1 = dma_map_single(NULL,
+ new_skb->data,
+ MAX_RX_LENGTH + 2,
+ DMA_FROM_DEVICE);
priv->rx[rx].rxd2 &= ~RX_DMA_DONE;
- dma_cache_wback_inv((unsigned long)&priv->rx[rx],
- sizeof(struct ramips_rx_dma));
+ wmb();
ramips_fe_wr(rx, RAMIPS_RX_CALC_IDX0);
}
- if(max_rx == 0)
+
+ if (max_rx == 0)
tasklet_schedule(&priv->rx_tasklet);
else
ramips_fe_wr(ramips_fe_rr(RAMIPS_FE_INT_ENABLE) | RAMIPS_RX_DLY_INT,
- RAMIPS_FE_INT_ENABLE);
+ RAMIPS_FE_INT_ENABLE);
}
static void
struct net_device *dev = (struct net_device*)ptr;
struct raeth_priv *priv = netdev_priv(dev);
- while((priv->tx[priv->skb_free_idx].txd2 & TX_DMA_DONE) &&
- (priv->tx_skb[priv->skb_free_idx]))
- {
- dev_kfree_skb_irq((struct sk_buff*)priv->tx_skb[priv->skb_free_idx]);
+ while ((priv->tx[priv->skb_free_idx].txd2 & TX_DMA_DONE) &&
+ (priv->tx_skb[priv->skb_free_idx])) {
+ dev_kfree_skb_irq((struct sk_buff *) priv->tx_skb[priv->skb_free_idx]);
priv->tx_skb[priv->skb_free_idx] = 0;
priv->skb_free_idx++;
- if(priv->skb_free_idx >= NUM_TX_DESC)
+ if (priv->skb_free_idx >= NUM_TX_DESC)
priv->skb_free_idx = 0;
}
+
ramips_fe_wr(ramips_fe_rr(RAMIPS_FE_INT_ENABLE) | RAMIPS_TX_DLY_INT,
- RAMIPS_FE_INT_ENABLE);
+ RAMIPS_FE_INT_ENABLE);
}
static int
ramips_eth_set_mac_addr(struct net_device *dev, void *priv)
{
- unsigned char *mac = (unsigned char*)priv;
+ unsigned char *mac = (unsigned char *) priv;
- if(netif_running(dev))
+ if (netif_running(dev))
return -EBUSY;
+
memcpy(dev->dev_addr, ((struct sockaddr*)priv)->sa_data, dev->addr_len);
ramips_fe_wr((mac[0] << 8) | mac[1], RAMIPS_GDMA1_MAC_ADRH);
- ramips_fe_wr(RAMIPS_GDMA1_MAC_ADRL,
- (mac[2] << 24) | (mac[3] << 16) | (mac[4] << 8) | mac[5]);
+ ramips_fe_wr((mac[2] << 24) | (mac[3] << 16) | (mac[4] << 8) | mac[5],
+ RAMIPS_GDMA1_MAC_ADRL);
return 0;
}
struct raeth_priv *priv = netdev_priv(dev);
unsigned long fe_int = ramips_fe_rr(RAMIPS_FE_INT_STATUS);
- if(fe_int & RAMIPS_RX_DLY_INT)
- {
+ ramips_fe_wr(0xFFFFFFFF, RAMIPS_FE_INT_STATUS);
+
+ if (fe_int & RAMIPS_RX_DLY_INT) {
ramips_fe_wr(ramips_fe_rr(RAMIPS_FE_INT_ENABLE) & ~(RAMIPS_RX_DLY_INT),
- RAMIPS_FE_INT_ENABLE);
+ RAMIPS_FE_INT_ENABLE);
tasklet_schedule(&priv->rx_tasklet);
}
- if(fe_int & RAMIPS_TX_DLY_INT)
- tasklet_schedule(&priv->tx_housekeeping_tasklet);
- ramips_fe_wr(0xFFFFFFFF, RAMIPS_FE_INT_STATUS);
+
+ if (fe_int & RAMIPS_TX_DLY_INT)
+ ramips_eth_tx_housekeeping((unsigned long)dev);
+
return IRQ_HANDLED;
}
ramips_eth_open(struct net_device *dev)
{
struct raeth_priv *priv = netdev_priv(dev);
+ int err;
+
+ err = request_irq(dev->irq, ramips_eth_irq, IRQF_DISABLED,
+ dev->name, dev);
+ if (err)
+ return err;
+
+ err = ramips_alloc_dma(priv);
+ if (err)
+ goto err_free_irq;
- ramips_alloc_dma(dev);
+ ramips_setup_dma(priv);
ramips_fe_wr((ramips_fe_rr(RAMIPS_PDMA_GLO_CFG) & 0xff) |
(RAMIPS_TX_WB_DDONE | RAMIPS_RX_DMA_EN |
RAMIPS_TX_DMA_EN | RAMIPS_PDMA_SIZE_4DWORDS),
~(RAMIPS_US_CYC_CNT_MASK << RAMIPS_US_CYC_CNT_SHIFT)) |
((rt305x_sys_freq / RAMIPS_US_CYC_CNT_DIVISOR) << RAMIPS_US_CYC_CNT_SHIFT),
RAMIPS_FE_GLO_CFG);
- request_irq(dev->irq, ramips_eth_irq, IRQF_DISABLED, dev->name, dev);
+
tasklet_init(&priv->tx_housekeeping_tasklet, ramips_eth_tx_housekeeping,
- (unsigned long)dev);
+ (unsigned long)dev);
tasklet_init(&priv->rx_tasklet, ramips_eth_rx_hw, (unsigned long)dev);
+
ramips_fe_wr(RAMIPS_DELAY_INIT, RAMIPS_DLY_INT_CFG);
ramips_fe_wr(RAMIPS_TX_DLY_INT | RAMIPS_RX_DLY_INT, RAMIPS_FE_INT_ENABLE);
ramips_fe_wr(ramips_fe_rr(RAMIPS_GDMA1_FWD_CFG) &
ramips_fe_wr(RAMIPS_PSE_FQFC_CFG_INIT, RAMIPS_PSE_FQ_CFG);
ramips_fe_wr(1, RAMIPS_FE_RST_GL);
ramips_fe_wr(0, RAMIPS_FE_RST_GL);
+
netif_start_queue(dev);
return 0;
+
+ err_free_irq:
+ free_irq(dev->irq, dev);
+ return err;
}
static int
{
struct raeth_priv *priv = netdev_priv(dev);
- ramips_fe_wr(RAMIPS_PDMA_GLO_CFG, ramips_fe_rr(RAMIPS_PDMA_GLO_CFG) &
- ~(RAMIPS_TX_WB_DDONE | RAMIPS_RX_DMA_EN | RAMIPS_TX_DMA_EN));
+ ramips_fe_wr(ramips_fe_rr(RAMIPS_PDMA_GLO_CFG) &
+ ~(RAMIPS_TX_WB_DDONE | RAMIPS_RX_DMA_EN | RAMIPS_TX_DMA_EN),
+ RAMIPS_PDMA_GLO_CFG);
free_irq(dev->irq, dev);
netif_stop_queue(dev);
tasklet_kill(&priv->tx_housekeeping_tasklet);
tasklet_kill(&priv->rx_tasklet);
- pci_free_consistent(NULL, NUM_TX_DESC * sizeof(struct ramips_tx_dma),
- priv->tx, priv->phy_tx);
- pci_free_consistent(NULL, NUM_RX_DESC * sizeof(struct ramips_rx_dma),
- priv->rx, priv->phy_rx);
+ ramips_cleanup_dma(priv);
printk(KERN_DEBUG "ramips_eth: stopped\n");
return 0;
}
ramips_eth_set_mac_addr(dev, &addr);
ether_setup(dev);
- dev->open = ramips_eth_open;
- dev->stop = ramips_eth_stop;
- dev->hard_start_xmit = ramips_eth_hard_start_xmit;
- dev->set_mac_address = ramips_eth_set_mac_addr;
- dev->mtu = MAX_RX_LENGTH;
- dev->tx_timeout = ramips_eth_timeout;
+ dev->mtu = 1500;
dev->watchdog_timeo = TX_TIMEOUT;
+ spin_lock_init(&priv->page_lock);
+
return 0;
}
+static const struct net_device_ops ramips_eth_netdev_ops = {
+ .ndo_init = ramips_eth_probe,
+ .ndo_open = ramips_eth_open,
+ .ndo_stop = ramips_eth_stop,
+ .ndo_start_xmit = ramips_eth_hard_start_xmit,
+ .ndo_tx_timeout = ramips_eth_timeout,
+ .ndo_change_mtu = eth_change_mtu,
+ .ndo_set_mac_address = ramips_eth_set_mac_addr,
+ .ndo_validate_addr = eth_validate_addr,
+};
+
static int
ramips_eth_plat_probe(struct platform_device *plat)
{
struct raeth_priv *priv;
struct ramips_eth_platform_data *data = plat->dev.platform_data;
- ramips_fe_base = ioremap_nocache(data->base_addr, PAGE_SIZE);
- if(!ramips_fe_base)
+ struct resource *res;
+ int err;
+
+ if (!data) {
+ dev_err(&plat->dev, "no platform data specified\n");
+ return -EINVAL;
+ }
+
+ res = platform_get_resource(plat, IORESOURCE_MEM, 0);
+ if (!res) {
+ dev_err(&plat->dev, "no memory resource found\n");
+ return -ENXIO;
+ }
+
+ ramips_fe_base = ioremap_nocache(res->start, res->end - res->start + 1);
+ if (!ramips_fe_base)
return -ENOMEM;
+
ramips_dev = alloc_etherdev(sizeof(struct raeth_priv));
- if(!ramips_dev)
- return -ENOMEM;
+ if (!ramips_dev) {
+ dev_err(&plat->dev, "alloc_etherdev failed\n");
+ err = -ENOMEM;
+ goto err_unmap;
+ }
+
strcpy(ramips_dev->name, "eth%d");
- ramips_dev->irq = data->irq;
+ ramips_dev->irq = platform_get_irq(plat, 0);
+ if (ramips_dev->irq < 0) {
+ dev_err(&plat->dev, "no IRQ resource found\n");
+ err = -ENXIO;
+ goto err_free_dev;
+ }
ramips_dev->addr_len = ETH_ALEN;
ramips_dev->base_addr = (unsigned long)ramips_fe_base;
- ramips_dev->init = ramips_eth_probe;
- priv = (struct raeth_priv*)netdev_priv(ramips_dev);
+ ramips_dev->netdev_ops = &ramips_eth_netdev_ops;
+
+ priv = netdev_priv(ramips_dev);
priv->plat = data;
- if(register_netdev(ramips_dev))
- {
- printk(KERN_ERR "ramips_eth: error bringing up device\n");
- return -ENXIO;
+
+ err = register_netdev(ramips_dev);
+ if (err) {
+ dev_err(&plat->dev, "error bringing up device\n");
+ goto err_free_dev;
}
+
#ifdef CONFIG_RALINK_RT305X
rt305x_esw_init();
#endif
printk(KERN_DEBUG "ramips_eth: loaded\n");
return 0;
+
+ err_free_dev:
+ kfree(ramips_dev);
+ err_unmap:
+ iounmap(ramips_fe_base);
+ return err;
}
static int
projects / openwrt.git / blobdiff