Skip to content

L
linux-davinci
Commit 2db4ee1f authored by Bahadir Balban's avatar Bahadir Balban Committed by Catalin Marinas
Browse files
Options

SMSC911x driver update for the latest NAPI changes 

The patch updates the SMSC911x device driver to support the latest
NAPI changes.
Signed-off-by: default avatarBahadir Balban <bahadir.balban@arm.com>
parent 6dfd22af
Show whitespace changes
Inline Side-by-side
Showing with 90 additions and 81 deletions
drivers/net/smsc911x.c
View file @ 2db4ee1f
......@@ -98,7 +98,6 @@ struct smsc911x_data {
spinlock_t phy_lock;
spinlock_t dev_lock;
struct net_device_stats stats;
struct mii_if_info mii;
unsigned int using_extphy;
u32 msg_enable;
......@@ -106,6 +105,8 @@ struct smsc911x_data {
unsigned int gpio_setting;
unsigned int gpio_orig_setting;
#endif
struct net_device *netdev;
struct napi_struct napi;
struct timer_list link_poll_timer;
unsigned int stop_link_poll;
......@@ -903,6 +904,7 @@ static unsigned int smsc911x_tx_get_txstatcount(struct smsc911x_data *pdata)
/* Reads tx statuses and increments counters where necessary */
static void smsc911x_tx_update_txcounters(struct smsc911x_data *pdata)
{
struct net_device *netdev = pdata->netdev;
unsigned int tx_stat;
while ((tx_stat = smsc911x_tx_get_txstatus(pdata)) != 0) {
......@@ -917,24 +919,24 @@ static void smsc911x_tx_update_txcounters(struct smsc911x_data *pdata)
SMSC_WARNING("Packet tag reserved bit is high");
} else {
if (unlikely(tx_stat & 0x00008000)) {
pdata->stats.tx_errors++;
netdev->stats.tx_errors++;
} else {
pdata->stats.tx_packets++;
pdata->stats.tx_bytes += (tx_stat >> 16);
netdev->stats.tx_packets++;
netdev->stats.tx_bytes += (tx_stat >> 16);
}
if (unlikely(tx_stat & 0x00000100)) {
pdata->stats.collisions += 16;
pdata->stats.tx_aborted_errors += 1;
netdev->stats.collisions += 16;
netdev->stats.tx_aborted_errors += 1;
} else {
pdata->stats.collisions +=
netdev->stats.collisions +=
((tx_stat >> 3) & 0xF);
}
if (unlikely(tx_stat & 0x00000800)) {
pdata->stats.tx_carrier_errors += 1;
netdev->stats.tx_carrier_errors += 1;
}
if (unlikely(tx_stat & 0x00000200)) {
pdata->stats.collisions++;
pdata->stats.tx_aborted_errors++;
netdev->stats.collisions++;
netdev->stats.tx_aborted_errors++;
}
}
}
......@@ -944,12 +946,13 @@ static void smsc911x_tx_update_txcounters(struct smsc911x_data *pdata)
static void
smsc911x_rx_counterrors(struct smsc911x_data *pdata, unsigned int rxstat)
{
struct net_device *netdev = pdata->netdev;
int crc_err = 0;
if (unlikely(rxstat & 0x00008000)) {
pdata->stats.rx_errors++;
netdev->stats.rx_errors++;
if (unlikely(rxstat & 0x00000002)) {
pdata->stats.rx_crc_errors++;
netdev->stats.rx_crc_errors++;
crc_err = 1;
}
}
......@@ -957,10 +960,10 @@ smsc911x_rx_counterrors(struct smsc911x_data *pdata, unsigned int rxstat)
if (unlikely((rxstat & 0x00001020) == 0x00001020)) {
/* Frame type indicates length,
* and length error is set */
pdata->stats.rx_length_errors++;
netdev->stats.rx_length_errors++;
}
if (rxstat & RX_STS_MCAST_)
pdata->stats.multicast++;
netdev->stats.multicast++;
}
}
......@@ -990,13 +993,13 @@ smsc911x_rx_fastforward(struct smsc911x_data *pdata, unsigned int pktbytes)
}
/* NAPI poll function */
static int smsc911x_poll(struct net_device *dev, int *budget)
static int smsc911x_poll(struct napi_struct *napi, int budget)
{
struct smsc911x_data *pdata = netdev_priv(dev);
struct smsc911x_data *pdata = container_of(napi, struct smsc911x_data, napi);
struct net_device *dev = pdata->netdev;
int npackets = 0;
int quota = min(dev->quota, *budget);
while (npackets < quota) {
while (npackets < budget) {
unsigned int pktlength;
unsigned int pktwords;
unsigned int rxstat = smsc911x_rx_get_rxstatus(pdata);
......@@ -1027,15 +1030,15 @@ static int smsc911x_poll(struct net_device *dev, int *budget)
netif_receive_skb(skb);
/* Update counters */
pdata->stats.rx_packets++;
pdata->stats.rx_bytes += (pktlength - 4);
dev->stats.rx_packets++;
dev->stats.rx_bytes += (pktlength - 4);
dev->last_rx = jiffies;
npackets++;
continue;
} else {
SMSC_WARNING("Unable to allocate sk_buff "
"for rx packet, in PIO path");
pdata->stats.rx_dropped++;
dev->stats.rx_dropped++;
}
}
/* At this point, the packet is to be read out
......@@ -1043,25 +1046,21 @@ static int smsc911x_poll(struct net_device *dev, int *budget)
smsc911x_rx_fastforward(pdata, pktlength);
}
pdata->stats.rx_dropped += smsc911x_reg_read(pdata, RX_DROP);
dev->stats.rx_dropped += smsc911x_reg_read(pdata, RX_DROP);
smsc911x_reg_write(INT_STS_RSFL_, pdata, INT_STS);
*budget -= npackets;
dev->quota -= npackets;
if (npackets < quota) {
if (npackets < budget) {
unsigned int temp;
/* We processed all packets available. Tell NAPI it can
* stop polling then re-enable rx interrupts */
netif_rx_complete(dev);
netif_rx_complete(dev, napi);
temp = smsc911x_reg_read(pdata, INT_EN);
temp |= INT_EN_RSFL_EN_;
smsc911x_reg_write(temp, pdata, INT_EN);
return 0;
}
/* There are still packets waiting */
return 1;
/* Return total received packets */
return npackets;
}
/* Returns hash bit number for given MAC address
......@@ -1141,8 +1140,6 @@ static int smsc911x_open(struct net_device *dev)
unsigned int temp;
unsigned int intcfg;
spin_lock_init(&pdata->phy_lock);
/* Reset the LAN911x */
smsc911x_reg_write(HW_CFG_SRST_, pdata, HW_CFG);
timeout = 10;
......@@ -1225,42 +1222,6 @@ static int smsc911x_open(struct net_device *dev)
printk(KERN_INFO "%s: SMSC911x/921x identified at %#08lx, IRQ: %d\n",
dev->name, (unsigned long)pdata->ioaddr, dev->irq);
spin_lock_irq(&pdata->phy_lock);
/* Check if mac address has been specified when bringing interface up */
if (is_valid_ether_addr(dev->dev_addr)) {
smsc911x_set_mac_address(pdata, dev->dev_addr);
SMSC_TRACE("MAC Address is specified by configuration");
} else {
/* Try reading mac address from device. if EEPROM is present
* it will already have been set */
u32 mac_high16 = smsc911x_mac_read(pdata, ADDRH);
u32 mac_low32 = smsc911x_mac_read(pdata, ADDRL);
dev->dev_addr[0] = (u8)(mac_low32);
dev->dev_addr[1] = (u8)(mac_low32 >> 8);
dev->dev_addr[2] = (u8)(mac_low32 >> 16);
dev->dev_addr[3] = (u8)(mac_low32 >> 24);
dev->dev_addr[4] = (u8)(mac_high16);
dev->dev_addr[5] = (u8)(mac_high16 >> 8);
if (is_valid_ether_addr(dev->dev_addr)) {
/* eeprom values are valid so use them */
SMSC_TRACE("Mac Address is read from LAN911x EEPROM");
} else {
/* eeprom values are invalid, generate random MAC */
random_ether_addr(dev->dev_addr);
smsc911x_set_mac_address(pdata, dev->dev_addr);
SMSC_TRACE("MAC Address is set to random_ether_addr");
}
}
spin_unlock_irq(&pdata->phy_lock);
printk(KERN_INFO
"%s: SMSC911x MAC Address: %02x:%02x:%02x:%02x:%02x:%02x\n",
dev->name, dev->dev_addr[0], dev->dev_addr[1], dev->dev_addr[2],
dev->dev_addr[3], dev->dev_addr[4], dev->dev_addr[5]);
netif_carrier_off(dev);
if (!smsc911x_phy_initialise(dev)) {
......@@ -1281,6 +1242,9 @@ static int smsc911x_open(struct net_device *dev)
/* set RX Data offset to 2 bytes for alignment */
smsc911x_reg_write((2 << 8), pdata, RX_CFG);
/* enable the polling before enabling the interrupts */
napi_enable(&pdata->napi);
temp = smsc911x_reg_read(pdata, INT_EN);
temp |= (INT_EN_TDFA_EN_ | INT_EN_RSFL_EN_ | INT_EN_PHY_INT_EN_);
smsc911x_reg_write(temp, pdata, INT_EN);
......@@ -1302,6 +1266,8 @@ static int smsc911x_stop(struct net_device *dev)
{
struct smsc911x_data *pdata = netdev_priv(dev);
napi_disable(&pdata->napi);
pdata->stop_link_poll = 1;
del_timer_sync(&pdata->link_poll_timer);
......@@ -1310,7 +1276,7 @@ static int smsc911x_stop(struct net_device *dev)
netif_stop_queue(dev);
/* At this point all Rx and Tx activity is stopped */
pdata->stats.rx_dropped += smsc911x_reg_read(pdata, RX_DROP);
dev->stats.rx_dropped += smsc911x_reg_read(pdata, RX_DROP);
smsc911x_tx_update_txcounters(pdata);
SMSC_TRACE("Interface stopped");
......@@ -1374,8 +1340,8 @@ static struct net_device_stats *smsc911x_get_stats(struct net_device *dev)
{
struct smsc911x_data *pdata = netdev_priv(dev);
smsc911x_tx_update_txcounters(pdata);
pdata->stats.rx_dropped += smsc911x_reg_read(pdata, RX_DROP);
return &pdata->stats;
dev->stats.rx_dropped += smsc911x_reg_read(pdata, RX_DROP);
return &dev->stats;
}
/* Entry point for setting addressing modes */
......@@ -1516,11 +1482,13 @@ static irqreturn_t smsc911x_irqhandler(int irq, void *dev_id)
}
if (likely(intsts & inten & INT_STS_RSFL_)) {
if(likely(netif_rx_schedule_prep(dev, &pdata->napi))) {
/* Disable Rx interrupts and schedule NAPI poll */
temp = smsc911x_reg_read(pdata, INT_EN);
temp &= (~INT_EN_RSFL_EN_);
smsc911x_reg_write(temp, pdata, INT_EN);
netif_rx_schedule(dev);
__netif_rx_schedule(dev, &pdata->napi);
}
serviced = IRQ_HANDLED;
}
......@@ -2005,8 +1973,7 @@ static int smsc911x_init(struct net_device *dev)
dev->set_multicast_list = smsc911x_set_multicast_list;
dev->flags |= IFF_MULTICAST;
dev->do_ioctl = smsc911x_do_ioctl;
dev->poll = smsc911x_poll;
dev->weight = 64;
netif_napi_add(dev, &pdata->napi, smsc911x_poll, 64);
dev->ethtool_ops = &smsc911x_ethtool_ops;
#ifdef CONFIG_NET_POLL_CONTROLLER
......@@ -2093,10 +2060,10 @@ static int smsc911x_drv_probe(struct platform_device *pdev)
goto out_release_io_1;
}
SET_MODULE_OWNER(dev);
SET_NETDEV_DEV(dev, &pdev->dev);
pdata = netdev_priv(dev);
pdata->netdev = dev;
dev->irq = platform_get_irq(pdev, 0);
pdata->ioaddr = ioremap_nocache(res->start, res_size);
......@@ -2108,6 +2075,10 @@ static int smsc911x_drv_probe(struct platform_device *pdev)
pdata->irq_polarity = config->irq_polarity;
pdata->irq_type = config->irq_type;
}
#if 1
pdata->irq_polarity = 1;
pdata->irq_type = 1;
#endif
if (pdata->ioaddr == NULL) {
SMSC_WARNING("Error smsc911x base address invalid");
......@@ -2145,6 +2116,44 @@ static int smsc911x_drv_probe(struct platform_device *pdev)
SMSC_TRACE("Network interface: \"%s\"", dev->name);
}
spin_lock_init(&pdata->phy_lock);
spin_lock_irq(&pdata->phy_lock);
/* Check if mac address has been specified when bringing interface up */
if (is_valid_ether_addr(dev->dev_addr)) {
smsc911x_set_mac_address(pdata, dev->dev_addr);
SMSC_TRACE("MAC Address is specified by configuration");
} else {
/* Try reading mac address from device. if EEPROM is present
* it will already have been set */
u32 mac_high16 = smsc911x_mac_read(pdata, ADDRH);
u32 mac_low32 = smsc911x_mac_read(pdata, ADDRL);
dev->dev_addr[0] = (u8)(mac_low32);
dev->dev_addr[1] = (u8)(mac_low32 >> 8);
dev->dev_addr[2] = (u8)(mac_low32 >> 16);
dev->dev_addr[3] = (u8)(mac_low32 >> 24);
dev->dev_addr[4] = (u8)(mac_high16);
dev->dev_addr[5] = (u8)(mac_high16 >> 8);
if (is_valid_ether_addr(dev->dev_addr)) {
/* eeprom values are valid so use them */
SMSC_TRACE("Mac Address is read from LAN911x EEPROM");
} else {
/* eeprom values are invalid, generate random MAC */
random_ether_addr(dev->dev_addr);
smsc911x_set_mac_address(pdata, dev->dev_addr);
SMSC_TRACE("MAC Address is set to random_ether_addr");
}
}
spin_unlock_irq(&pdata->phy_lock);
printk(KERN_INFO
"%s: SMSC911x MAC Address: %02x:%02x:%02x:%02x:%02x:%02x\n",
dev->name, dev->dev_addr[0], dev->dev_addr[1], dev->dev_addr[2],
dev->dev_addr[3], dev->dev_addr[4], dev->dev_addr[5]);
return 0;
out_unset_drvdata_4:
......
Markdown is supported
0% or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment