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linux/drivers/net/tsi108_eth.c
Stephen Hemminger bea3348eef [NET]: Make NAPI polling independent of struct net_device objects. 
Several devices have multiple independant RX queues per net
device, and some have a single interrupt doorbell for several
queues.

In either case, it's easier to support layouts like that if the
structure representing the poll is independant from the net
device itself.

The signature of the ->poll() call back goes from:

	int foo_poll(struct net_device *dev, int *budget)

to

	int foo_poll(struct napi_struct *napi, int budget)

The caller is returned the number of RX packets processed (or
the number of "NAPI credits" consumed if you want to get
abstract).  The callee no longer messes around bumping
dev->quota, *budget, etc. because that is all handled in the
caller upon return.

The napi_struct is to be embedded in the device driver private data
structures.

Furthermore, it is the driver's responsibility to disable all NAPI
instances in it's ->stop() device close handler.  Since the
napi_struct is privatized into the driver's private data structures,
only the driver knows how to get at all of the napi_struct instances
it may have per-device.

With lots of help and suggestions from Rusty Russell, Roland Dreier,
Michael Chan, Jeff Garzik, and Jamal Hadi Salim.

Bug fixes from Thomas Graf, Roland Dreier, Peter Zijlstra,
Joseph Fannin, Scott Wood, Hans J. Koch, and Michael Chan.

[ Ported to current tree and all drivers converted.  Integrated
  Stephen's follow-on kerneldoc additions, and restored poll_list
  handling to the old style to fix mutual exclusion issues.  -DaveM ]

Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-10 16:47:45 -07:00

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/*******************************************************************************
Copyright(c) 2006 Tundra Semiconductor Corporation.
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.
This program is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
more details.
You should have received a copy of the GNU General Public License along with
this program; if not, write to the Free Software Foundation, Inc., 59
Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*******************************************************************************/
/* This driver is based on the driver code originally developed
* for the Intel IOC80314 (ForestLake) Gigabit Ethernet by
* scott.wood@timesys.com * Copyright (C) 2003 TimeSys Corporation
*
* Currently changes from original version are:
* - porting to Tsi108-based platform and kernel 2.6 (kong.lai@tundra.com)
* - modifications to handle two ports independently and support for
* additional PHY devices (alexandre.bounine@tundra.com)
* - Get hardware information from platform device. (tie-fei.zang@freescale.com)
*
*/
#include <linux/module.h>
#include <linux/types.h>
#include <linux/init.h>
#include <linux/net.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/delay.h>
#include <linux/crc32.h>
#include <linux/mii.h>
#include <linux/device.h>
#include <linux/pci.h>
#include <linux/rtnetlink.h>
#include <linux/timer.h>
#include <linux/platform_device.h>
#include <linux/etherdevice.h>
#include <asm/system.h>
#include <asm/io.h>
#include <asm/tsi108.h>
#include "tsi108_eth.h"
#define MII_READ_DELAY 10000 /* max link wait time in msec */
#define TSI108_RXRING_LEN 256
/* NOTE: The driver currently does not support receiving packets
* larger than the buffer size, so don't decrease this (unless you
* want to add such support).
*/
#define TSI108_RXBUF_SIZE 1536
#define TSI108_TXRING_LEN 256
#define TSI108_TX_INT_FREQ 64
/* Check the phy status every half a second. */
#define CHECK_PHY_INTERVAL (HZ/2)
static int tsi108_init_one(struct platform_device *pdev);
static int tsi108_ether_remove(struct platform_device *pdev);
struct tsi108_prv_data {
void __iomem *regs; /* Base of normal regs */
void __iomem *phyregs; /* Base of register bank used for PHY access */
struct net_device *dev;
struct napi_struct napi;
unsigned int phy; /* Index of PHY for this interface */
unsigned int irq_num;
unsigned int id;
unsigned int phy_type;
struct timer_list timer;/* Timer that triggers the check phy function */
unsigned int rxtail; /* Next entry in rxring to read */
unsigned int rxhead; /* Next entry in rxring to give a new buffer */
unsigned int rxfree; /* Number of free, allocated RX buffers */
unsigned int rxpending; /* Non-zero if there are still descriptors
* to be processed from a previous descriptor
* interrupt condition that has been cleared */
unsigned int txtail; /* Next TX descriptor to check status on */
unsigned int txhead; /* Next TX descriptor to use */
/* Number of free TX descriptors. This could be calculated from
* rxhead and rxtail if one descriptor were left unused to disambiguate
* full and empty conditions, but it's simpler to just keep track
* explicitly. */
unsigned int txfree;
unsigned int phy_ok; /* The PHY is currently powered on. */
/* PHY status (duplex is 1 for half, 2 for full,
* so that the default 0 indicates that neither has
* yet been configured). */
unsigned int link_up;
unsigned int speed;
unsigned int duplex;
tx_desc *txring;
rx_desc *rxring;
struct sk_buff *txskbs[TSI108_TXRING_LEN];
struct sk_buff *rxskbs[TSI108_RXRING_LEN];
dma_addr_t txdma, rxdma;
/* txlock nests in misclock and phy_lock */
spinlock_t txlock, misclock;
/* stats is used to hold the upper bits of each hardware counter,
* and tmpstats is used to hold the full values for returning
* to the caller of get_stats(). They must be separate in case
* an overflow interrupt occurs before the stats are consumed.
*/
struct net_device_stats stats;
struct net_device_stats tmpstats;
/* These stats are kept separate in hardware, thus require individual
* fields for handling carry. They are combined in get_stats.
*/
unsigned long rx_fcs; /* Add to rx_frame_errors */
unsigned long rx_short_fcs; /* Add to rx_frame_errors */
unsigned long rx_long_fcs; /* Add to rx_frame_errors */
unsigned long rx_underruns; /* Add to rx_length_errors */
unsigned long rx_overruns; /* Add to rx_length_errors */
unsigned long tx_coll_abort; /* Add to tx_aborted_errors/collisions */
unsigned long tx_pause_drop; /* Add to tx_aborted_errors */
unsigned long mc_hash[16];
u32 msg_enable; /* debug message level */
struct mii_if_info mii_if;
unsigned int init_media;
};
/* Structure for a device driver */
static struct platform_driver tsi_eth_driver = {
.probe = tsi108_init_one,
.remove = tsi108_ether_remove,
.driver = {
.name = "tsi-ethernet",
},
};
static void tsi108_timed_checker(unsigned long dev_ptr);
static void dump_eth_one(struct net_device *dev)
{
struct tsi108_prv_data *data = netdev_priv(dev);
printk("Dumping %s...\n", dev->name);
printk("intstat %x intmask %x phy_ok %d"
" link %d speed %d duplex %d\n",
TSI_READ(TSI108_EC_INTSTAT),
TSI_READ(TSI108_EC_INTMASK), data->phy_ok,
data->link_up, data->speed, data->duplex);
printk("TX: head %d, tail %d, free %d, stat %x, estat %x, err %x\n",
data->txhead, data->txtail, data->txfree,
TSI_READ(TSI108_EC_TXSTAT),
TSI_READ(TSI108_EC_TXESTAT),
TSI_READ(TSI108_EC_TXERR));
printk("RX: head %d, tail %d, free %d, stat %x,"
" estat %x, err %x, pending %d\n\n",
data->rxhead, data->rxtail, data->rxfree,
TSI_READ(TSI108_EC_RXSTAT),
TSI_READ(TSI108_EC_RXESTAT),
TSI_READ(TSI108_EC_RXERR), data->rxpending);
}
/* Synchronization is needed between the thread and up/down events.
* Note that the PHY is accessed through the same registers for both
* interfaces, so this can't be made interface-specific.
*/
static DEFINE_SPINLOCK(phy_lock);
static int tsi108_read_mii(struct tsi108_prv_data *data, int reg)
{
unsigned i;
TSI_WRITE_PHY(TSI108_MAC_MII_ADDR,
(data->phy << TSI108_MAC_MII_ADDR_PHY) |
(reg << TSI108_MAC_MII_ADDR_REG));
TSI_WRITE_PHY(TSI108_MAC_MII_CMD, 0);
TSI_WRITE_PHY(TSI108_MAC_MII_CMD, TSI108_MAC_MII_CMD_READ);
for (i = 0; i < 100; i++) {
if (!(TSI_READ_PHY(TSI108_MAC_MII_IND) &
(TSI108_MAC_MII_IND_NOTVALID | TSI108_MAC_MII_IND_BUSY)))
break;
udelay(10);
}
if (i == 100)
return 0xffff;
else
return (TSI_READ_PHY(TSI108_MAC_MII_DATAIN));
}
static void tsi108_write_mii(struct tsi108_prv_data *data,
int reg, u16 val)
{
unsigned i = 100;
TSI_WRITE_PHY(TSI108_MAC_MII_ADDR,
(data->phy << TSI108_MAC_MII_ADDR_PHY) |
(reg << TSI108_MAC_MII_ADDR_REG));
TSI_WRITE_PHY(TSI108_MAC_MII_DATAOUT, val);
while (i--) {
if(!(TSI_READ_PHY(TSI108_MAC_MII_IND) &
TSI108_MAC_MII_IND_BUSY))
break;
udelay(10);
}
}
static int tsi108_mdio_read(struct net_device *dev, int addr, int reg)
{
struct tsi108_prv_data *data = netdev_priv(dev);
return tsi108_read_mii(data, reg);
}
static void tsi108_mdio_write(struct net_device *dev, int addr, int reg, int val)
{
struct tsi108_prv_data *data = netdev_priv(dev);
tsi108_write_mii(data, reg, val);
}
static inline void tsi108_write_tbi(struct tsi108_prv_data *data,
int reg, u16 val)
{
unsigned i = 1000;
TSI_WRITE(TSI108_MAC_MII_ADDR,
(0x1e << TSI108_MAC_MII_ADDR_PHY)
| (reg << TSI108_MAC_MII_ADDR_REG));
TSI_WRITE(TSI108_MAC_MII_DATAOUT, val);
while(i--) {
if(!(TSI_READ(TSI108_MAC_MII_IND) & TSI108_MAC_MII_IND_BUSY))
return;
udelay(10);
}
printk(KERN_ERR "%s function time out \n", __FUNCTION__);
}
static int mii_speed(struct mii_if_info *mii)
{
int advert, lpa, val, media;
int lpa2 = 0;
int speed;
if (!mii_link_ok(mii))
return 0;
val = (*mii->mdio_read) (mii->dev, mii->phy_id, MII_BMSR);
if ((val & BMSR_ANEGCOMPLETE) == 0)
return 0;
advert = (*mii->mdio_read) (mii->dev, mii->phy_id, MII_ADVERTISE);
lpa = (*mii->mdio_read) (mii->dev, mii->phy_id, MII_LPA);
media = mii_nway_result(advert & lpa);
if (mii->supports_gmii)
lpa2 = mii->mdio_read(mii->dev, mii->phy_id, MII_STAT1000);
speed = lpa2 & (LPA_1000FULL | LPA_1000HALF) ? 1000 :
(media & (ADVERTISE_100FULL | ADVERTISE_100HALF) ? 100 : 10);
return speed;
}
static void tsi108_check_phy(struct net_device *dev)
{
struct tsi108_prv_data *data = netdev_priv(dev);
u32 mac_cfg2_reg, portctrl_reg;
u32 duplex;
u32 speed;
unsigned long flags;
/* Do a dummy read, as for some reason the first read
* after a link becomes up returns link down, even if
* it's been a while since the link came up.
*/
spin_lock_irqsave(&phy_lock, flags);
if (!data->phy_ok)
goto out;
tsi108_read_mii(data, MII_BMSR);
duplex = mii_check_media(&data->mii_if, netif_msg_link(data), data->init_media);
data->init_media = 0;
if (netif_carrier_ok(dev)) {
speed = mii_speed(&data->mii_if);
if ((speed != data->speed) || duplex) {
mac_cfg2_reg = TSI_READ(TSI108_MAC_CFG2);
portctrl_reg = TSI_READ(TSI108_EC_PORTCTRL);
mac_cfg2_reg &= ~TSI108_MAC_CFG2_IFACE_MASK;
if (speed == 1000) {
mac_cfg2_reg |= TSI108_MAC_CFG2_GIG;
portctrl_reg &= ~TSI108_EC_PORTCTRL_NOGIG;
} else {
mac_cfg2_reg |= TSI108_MAC_CFG2_NOGIG;
portctrl_reg |= TSI108_EC_PORTCTRL_NOGIG;
}
data->speed = speed;
if (data->mii_if.full_duplex) {
mac_cfg2_reg |= TSI108_MAC_CFG2_FULLDUPLEX;
portctrl_reg &= ~TSI108_EC_PORTCTRL_HALFDUPLEX;
data->duplex = 2;
} else {
mac_cfg2_reg &= ~TSI108_MAC_CFG2_FULLDUPLEX;
portctrl_reg |= TSI108_EC_PORTCTRL_HALFDUPLEX;
data->duplex = 1;
}
TSI_WRITE(TSI108_MAC_CFG2, mac_cfg2_reg);
TSI_WRITE(TSI108_EC_PORTCTRL, portctrl_reg);
if (data->link_up == 0) {
/* The manual says it can take 3-4 usecs for the speed change
* to take effect.
*/
udelay(5);
spin_lock(&data->txlock);
if (is_valid_ether_addr(dev->dev_addr) && data->txfree)
netif_wake_queue(dev);
data->link_up = 1;
spin_unlock(&data->txlock);
}
}
} else {
if (data->link_up == 1) {
netif_stop_queue(dev);
data->link_up = 0;
printk(KERN_NOTICE "%s : link is down\n", dev->name);
}
goto out;
}
out:
spin_unlock_irqrestore(&phy_lock, flags);
}
static inline void
tsi108_stat_carry_one(int carry, int carry_bit, int carry_shift,
unsigned long *upper)
{
if (carry & carry_bit)
*upper += carry_shift;
}
static void tsi108_stat_carry(struct net_device *dev)
{
struct tsi108_prv_data *data = netdev_priv(dev);
u32 carry1, carry2;
spin_lock_irq(&data->misclock);
carry1 = TSI_READ(TSI108_STAT_CARRY1);
carry2 = TSI_READ(TSI108_STAT_CARRY2);
TSI_WRITE(TSI108_STAT_CARRY1, carry1);
TSI_WRITE(TSI108_STAT_CARRY2, carry2);
tsi108_stat_carry_one(carry1, TSI108_STAT_CARRY1_RXBYTES,
TSI108_STAT_RXBYTES_CARRY, &data->stats.rx_bytes);
tsi108_stat_carry_one(carry1, TSI108_STAT_CARRY1_RXPKTS,
TSI108_STAT_RXPKTS_CARRY,
&data->stats.rx_packets);
tsi108_stat_carry_one(carry1, TSI108_STAT_CARRY1_RXFCS,
TSI108_STAT_RXFCS_CARRY, &data->rx_fcs);
tsi108_stat_carry_one(carry1, TSI108_STAT_CARRY1_RXMCAST,
TSI108_STAT_RXMCAST_CARRY,
&data->stats.multicast);
tsi108_stat_carry_one(carry1, TSI108_STAT_CARRY1_RXALIGN,
TSI108_STAT_RXALIGN_CARRY,
&data->stats.rx_frame_errors);
tsi108_stat_carry_one(carry1, TSI108_STAT_CARRY1_RXLENGTH,
TSI108_STAT_RXLENGTH_CARRY,
&data->stats.rx_length_errors);
tsi108_stat_carry_one(carry1, TSI108_STAT_CARRY1_RXRUNT,
TSI108_STAT_RXRUNT_CARRY, &data->rx_underruns);
tsi108_stat_carry_one(carry1, TSI108_STAT_CARRY1_RXJUMBO,
TSI108_STAT_RXJUMBO_CARRY, &data->rx_overruns);
tsi108_stat_carry_one(carry1, TSI108_STAT_CARRY1_RXFRAG,
TSI108_STAT_RXFRAG_CARRY, &data->rx_short_fcs);
tsi108_stat_carry_one(carry1, TSI108_STAT_CARRY1_RXJABBER,
TSI108_STAT_RXJABBER_CARRY, &data->rx_long_fcs);
tsi108_stat_carry_one(carry1, TSI108_STAT_CARRY1_RXDROP,
TSI108_STAT_RXDROP_CARRY,
&data->stats.rx_missed_errors);
tsi108_stat_carry_one(carry2, TSI108_STAT_CARRY2_TXBYTES,
TSI108_STAT_TXBYTES_CARRY, &data->stats.tx_bytes);
tsi108_stat_carry_one(carry2, TSI108_STAT_CARRY2_TXPKTS,
TSI108_STAT_TXPKTS_CARRY,
&data->stats.tx_packets);
tsi108_stat_carry_one(carry2, TSI108_STAT_CARRY2_TXEXDEF,
TSI108_STAT_TXEXDEF_CARRY,
&data->stats.tx_aborted_errors);
tsi108_stat_carry_one(carry2, TSI108_STAT_CARRY2_TXEXCOL,
TSI108_STAT_TXEXCOL_CARRY, &data->tx_coll_abort);
tsi108_stat_carry_one(carry2, TSI108_STAT_CARRY2_TXTCOL,
TSI108_STAT_TXTCOL_CARRY,
&data->stats.collisions);
tsi108_stat_carry_one(carry2, TSI108_STAT_CARRY2_TXPAUSE,
TSI108_STAT_TXPAUSEDROP_CARRY,
&data->tx_pause_drop);
spin_unlock_irq(&data->misclock);
}
/* Read a stat counter atomically with respect to carries.
* data->misclock must be held.
*/
static inline unsigned long
tsi108_read_stat(struct tsi108_prv_data * data, int reg, int carry_bit,
int carry_shift, unsigned long *upper)
{
int carryreg;
unsigned long val;
if (reg < 0xb0)
carryreg = TSI108_STAT_CARRY1;
else
carryreg = TSI108_STAT_CARRY2;
again:
val = TSI_READ(reg) | *upper;
/* Check to see if it overflowed, but the interrupt hasn't
* been serviced yet. If so, handle the carry here, and
* try again.
*/
if (unlikely(TSI_READ(carryreg) & carry_bit)) {
*upper += carry_shift;
TSI_WRITE(carryreg, carry_bit);
goto again;
}
return val;
}
static struct net_device_stats *tsi108_get_stats(struct net_device *dev)
{
unsigned long excol;
struct tsi108_prv_data *data = netdev_priv(dev);
spin_lock_irq(&data->misclock);
data->tmpstats.rx_packets =
tsi108_read_stat(data, TSI108_STAT_RXPKTS,
TSI108_STAT_CARRY1_RXPKTS,
TSI108_STAT_RXPKTS_CARRY, &data->stats.rx_packets);
data->tmpstats.tx_packets =
tsi108_read_stat(data, TSI108_STAT_TXPKTS,
TSI108_STAT_CARRY2_TXPKTS,
TSI108_STAT_TXPKTS_CARRY, &data->stats.tx_packets);
data->tmpstats.rx_bytes =
tsi108_read_stat(data, TSI108_STAT_RXBYTES,
TSI108_STAT_CARRY1_RXBYTES,
TSI108_STAT_RXBYTES_CARRY, &data->stats.rx_bytes);
data->tmpstats.tx_bytes =
tsi108_read_stat(data, TSI108_STAT_TXBYTES,
TSI108_STAT_CARRY2_TXBYTES,
TSI108_STAT_TXBYTES_CARRY, &data->stats.tx_bytes);
data->tmpstats.multicast =
tsi108_read_stat(data, TSI108_STAT_RXMCAST,
TSI108_STAT_CARRY1_RXMCAST,
TSI108_STAT_RXMCAST_CARRY, &data->stats.multicast);
excol = tsi108_read_stat(data, TSI108_STAT_TXEXCOL,
TSI108_STAT_CARRY2_TXEXCOL,
TSI108_STAT_TXEXCOL_CARRY,
&data->tx_coll_abort);
data->tmpstats.collisions =
tsi108_read_stat(data, TSI108_STAT_TXTCOL,
TSI108_STAT_CARRY2_TXTCOL,
TSI108_STAT_TXTCOL_CARRY, &data->stats.collisions);
data->tmpstats.collisions += excol;
data->tmpstats.rx_length_errors =
tsi108_read_stat(data, TSI108_STAT_RXLENGTH,
TSI108_STAT_CARRY1_RXLENGTH,
TSI108_STAT_RXLENGTH_CARRY,
&data->stats.rx_length_errors);
data->tmpstats.rx_length_errors +=
tsi108_read_stat(data, TSI108_STAT_RXRUNT,
TSI108_STAT_CARRY1_RXRUNT,
TSI108_STAT_RXRUNT_CARRY, &data->rx_underruns);
data->tmpstats.rx_length_errors +=
tsi108_read_stat(data, TSI108_STAT_RXJUMBO,
TSI108_STAT_CARRY1_RXJUMBO,
TSI108_STAT_RXJUMBO_CARRY, &data->rx_overruns);
data->tmpstats.rx_frame_errors =
tsi108_read_stat(data, TSI108_STAT_RXALIGN,
TSI108_STAT_CARRY1_RXALIGN,
TSI108_STAT_RXALIGN_CARRY,
&data->stats.rx_frame_errors);
data->tmpstats.rx_frame_errors +=
tsi108_read_stat(data, TSI108_STAT_RXFCS,
TSI108_STAT_CARRY1_RXFCS, TSI108_STAT_RXFCS_CARRY,
&data->rx_fcs);
data->tmpstats.rx_frame_errors +=
tsi108_read_stat(data, TSI108_STAT_RXFRAG,
TSI108_STAT_CARRY1_RXFRAG,
TSI108_STAT_RXFRAG_CARRY, &data->rx_short_fcs);
data->tmpstats.rx_missed_errors =
tsi108_read_stat(data, TSI108_STAT_RXDROP,
TSI108_STAT_CARRY1_RXDROP,
TSI108_STAT_RXDROP_CARRY,
&data->stats.rx_missed_errors);
/* These three are maintained by software. */
data->tmpstats.rx_fifo_errors = data->stats.rx_fifo_errors;
data->tmpstats.rx_crc_errors = data->stats.rx_crc_errors;
data->tmpstats.tx_aborted_errors =
tsi108_read_stat(data, TSI108_STAT_TXEXDEF,
TSI108_STAT_CARRY2_TXEXDEF,
TSI108_STAT_TXEXDEF_CARRY,
&data->stats.tx_aborted_errors);
data->tmpstats.tx_aborted_errors +=
tsi108_read_stat(data, TSI108_STAT_TXPAUSEDROP,
TSI108_STAT_CARRY2_TXPAUSE,
TSI108_STAT_TXPAUSEDROP_CARRY,
&data->tx_pause_drop);
data->tmpstats.tx_aborted_errors += excol;
data->tmpstats.tx_errors = data->tmpstats.tx_aborted_errors;
data->tmpstats.rx_errors = data->tmpstats.rx_length_errors +
data->tmpstats.rx_crc_errors +
data->tmpstats.rx_frame_errors +
data->tmpstats.rx_fifo_errors + data->tmpstats.rx_missed_errors;
spin_unlock_irq(&data->misclock);
return &data->tmpstats;
}
static void tsi108_restart_rx(struct tsi108_prv_data * data, struct net_device *dev)
{
TSI_WRITE(TSI108_EC_RXQ_PTRHIGH,
TSI108_EC_RXQ_PTRHIGH_VALID);
TSI_WRITE(TSI108_EC_RXCTRL, TSI108_EC_RXCTRL_GO
| TSI108_EC_RXCTRL_QUEUE0);
}
static void tsi108_restart_tx(struct tsi108_prv_data * data)
{
TSI_WRITE(TSI108_EC_TXQ_PTRHIGH,
TSI108_EC_TXQ_PTRHIGH_VALID);
TSI_WRITE(TSI108_EC_TXCTRL, TSI108_EC_TXCTRL_IDLEINT |
TSI108_EC_TXCTRL_GO | TSI108_EC_TXCTRL_QUEUE0);
}
/* txlock must be held by caller, with IRQs disabled, and
* with permission to re-enable them when the lock is dropped.
*/
static void tsi108_complete_tx(struct net_device *dev)
{
struct tsi108_prv_data *data = netdev_priv(dev);
int tx;
struct sk_buff *skb;
int release = 0;
while (!data->txfree || data->txhead != data->txtail) {
tx = data->txtail;
if (data->txring[tx].misc & TSI108_TX_OWN)
break;
skb = data->txskbs[tx];
if (!(data->txring[tx].misc & TSI108_TX_OK))
printk("%s: bad tx packet, misc %x\n",
dev->name, data->txring[tx].misc);
data->txtail = (data->txtail + 1) % TSI108_TXRING_LEN;
data->txfree++;
if (data->txring[tx].misc & TSI108_TX_EOF) {
dev_kfree_skb_any(skb);
release++;
}
}
if (release) {
if (is_valid_ether_addr(dev->dev_addr) && data->link_up)
netif_wake_queue(dev);
}
}
static int tsi108_send_packet(struct sk_buff * skb, struct net_device *dev)
{
struct tsi108_prv_data *data = netdev_priv(dev);
int frags = skb_shinfo(skb)->nr_frags + 1;
int i;
if (!data->phy_ok && net_ratelimit())
printk(KERN_ERR "%s: Transmit while PHY is down!\n", dev->name);
if (!data->link_up) {
printk(KERN_ERR "%s: Transmit while link is down!\n",
dev->name);
netif_stop_queue(dev);
return NETDEV_TX_BUSY;
}
if (data->txfree < MAX_SKB_FRAGS + 1) {
netif_stop_queue(dev);
if (net_ratelimit())
printk(KERN_ERR "%s: Transmit with full tx ring!\n",
dev->name);
return NETDEV_TX_BUSY;
}
if (data->txfree - frags < MAX_SKB_FRAGS + 1) {
netif_stop_queue(dev);
}
spin_lock_irq(&data->txlock);
for (i = 0; i < frags; i++) {
int misc = 0;
int tx = data->txhead;
/* This is done to mark every TSI108_TX_INT_FREQ tx buffers with
* the interrupt bit. TX descriptor-complete interrupts are
* enabled when the queue fills up, and masked when there is
* still free space. This way, when saturating the outbound
* link, the tx interrupts are kept to a reasonable level.
* When the queue is not full, reclamation of skbs still occurs
* as new packets are transmitted, or on a queue-empty
* interrupt.
*/
if ((tx % TSI108_TX_INT_FREQ == 0) &&
((TSI108_TXRING_LEN - data->txfree) >= TSI108_TX_INT_FREQ))
misc = TSI108_TX_INT;
data->txskbs[tx] = skb;
if (i == 0) {
data->txring[tx].buf0 = dma_map_single(NULL, skb->data,
skb->len - skb->data_len, DMA_TO_DEVICE);
data->txring[tx].len = skb->len - skb->data_len;
misc |= TSI108_TX_SOF;
} else {
skb_frag_t *frag = &skb_shinfo(skb)->frags[i - 1];
data->txring[tx].buf0 =
dma_map_page(NULL, frag->page, frag->page_offset,
frag->size, DMA_TO_DEVICE);
data->txring[tx].len = frag->size;
}
if (i == frags - 1)
misc |= TSI108_TX_EOF;
if (netif_msg_pktdata(data)) {
int i;
printk("%s: Tx Frame contents (%d)\n", dev->name,
skb->len);
for (i = 0; i < skb->len; i++)
printk(" %2.2x", skb->data[i]);
printk(".\n");
}
data->txring[tx].misc = misc | TSI108_TX_OWN;
data->txhead = (data->txhead + 1) % TSI108_TXRING_LEN;
data->txfree--;
}
tsi108_complete_tx(dev);
/* This must be done after the check for completed tx descriptors,
* so that the tail pointer is correct.
*/
if (!(TSI_READ(TSI108_EC_TXSTAT) & TSI108_EC_TXSTAT_QUEUE0))
tsi108_restart_tx(data);
spin_unlock_irq(&data->txlock);
return NETDEV_TX_OK;
}
static int tsi108_complete_rx(struct net_device *dev, int budget)
{
struct tsi108_prv_data *data = netdev_priv(dev);
int done = 0;
while (data->rxfree && done != budget) {
int rx = data->rxtail;
struct sk_buff *skb;
if (data->rxring[rx].misc & TSI108_RX_OWN)
break;
skb = data->rxskbs[rx];
data->rxtail = (data->rxtail + 1) % TSI108_RXRING_LEN;
data->rxfree--;
done++;
if (data->rxring[rx].misc & TSI108_RX_BAD) {
spin_lock_irq(&data->misclock);
if (data->rxring[rx].misc & TSI108_RX_CRC)
data->stats.rx_crc_errors++;
if (data->rxring[rx].misc & TSI108_RX_OVER)
data->stats.rx_fifo_errors++;
spin_unlock_irq(&data->misclock);
dev_kfree_skb_any(skb);
continue;
}
if (netif_msg_pktdata(data)) {
int i;
printk("%s: Rx Frame contents (%d)\n",
dev->name, data->rxring[rx].len);
for (i = 0; i < data->rxring[rx].len; i++)
printk(" %2.2x", skb->data[i]);
printk(".\n");
}
skb_put(skb, data->rxring[rx].len);
skb->protocol = eth_type_trans(skb, dev);
netif_receive_skb(skb);
dev->last_rx = jiffies;
}
return done;
}
static int tsi108_refill_rx(struct net_device *dev, int budget)
{
struct tsi108_prv_data *data = netdev_priv(dev);
int done = 0;
while (data->rxfree != TSI108_RXRING_LEN && done != budget) {
int rx = data->rxhead;
struct sk_buff *skb;
data->rxskbs[rx] = skb = dev_alloc_skb(TSI108_RXBUF_SIZE + 2);
if (!skb)
break;
skb_reserve(skb, 2); /* Align the data on a 4-byte boundary. */
data->rxring[rx].buf0 = dma_map_single(NULL, skb->data,
TSI108_RX_SKB_SIZE,
DMA_FROM_DEVICE);
/* Sometimes the hardware sets blen to zero after packet
* reception, even though the manual says that it's only ever
* modified by the driver.
*/
data->rxring[rx].blen = TSI108_RX_SKB_SIZE;
data->rxring[rx].misc = TSI108_RX_OWN | TSI108_RX_INT;
data->rxhead = (data->rxhead + 1) % TSI108_RXRING_LEN;
data->rxfree++;
done++;
}
if (done != 0 && !(TSI_READ(TSI108_EC_RXSTAT) &
TSI108_EC_RXSTAT_QUEUE0))
tsi108_restart_rx(data, dev);
return done;
}
static int tsi108_poll(struct napi_struct *napi, int budget)
{
struct tsi108_prv_data *data = container_of(napi, struct tsi108_prv_data, napi);
struct net_device *dev = data->dev;
u32 estat = TSI_READ(TSI108_EC_RXESTAT);
u32 intstat = TSI_READ(TSI108_EC_INTSTAT);
int num_received = 0, num_filled = 0;
intstat &= TSI108_INT_RXQUEUE0 | TSI108_INT_RXTHRESH |
TSI108_INT_RXOVERRUN | TSI108_INT_RXERROR | TSI108_INT_RXWAIT;
TSI_WRITE(TSI108_EC_RXESTAT, estat);
TSI_WRITE(TSI108_EC_INTSTAT, intstat);
if (data->rxpending || (estat & TSI108_EC_RXESTAT_Q0_DESCINT))
num_received = tsi108_complete_rx(dev, budget);
/* This should normally fill no more slots than the number of
* packets received in tsi108_complete_rx(). The exception
* is when we previously ran out of memory for RX SKBs. In that
* case, it's helpful to obey the budget, not only so that the
* CPU isn't hogged, but so that memory (which may still be low)
* is not hogged by one device.
*
* A work unit is considered to be two SKBs to allow us to catch
* up when the ring has shrunk due to out-of-memory but we're
* still removing the full budget's worth of packets each time.
*/
if (data->rxfree < TSI108_RXRING_LEN)
num_filled = tsi108_refill_rx(dev, budget * 2);
if (intstat & TSI108_INT_RXERROR) {
u32 err = TSI_READ(TSI108_EC_RXERR);
TSI_WRITE(TSI108_EC_RXERR, err);
if (err) {
if (net_ratelimit())
printk(KERN_DEBUG "%s: RX error %x\n",
dev->name, err);
if (!(TSI_READ(TSI108_EC_RXSTAT) &
TSI108_EC_RXSTAT_QUEUE0))
tsi108_restart_rx(data, dev);
}
}
if (intstat & TSI108_INT_RXOVERRUN) {
spin_lock_irq(&data->misclock);
data->stats.rx_fifo_errors++;
spin_unlock_irq(&data->misclock);
}
if (num_received < budget) {
data->rxpending = 0;
netif_rx_complete(dev, napi);
TSI_WRITE(TSI108_EC_INTMASK,
TSI_READ(TSI108_EC_INTMASK)
& ~(TSI108_INT_RXQUEUE0
| TSI108_INT_RXTHRESH |
TSI108_INT_RXOVERRUN |
TSI108_INT_RXERROR |
TSI108_INT_RXWAIT));
} else {
data->rxpending = 1;
}
return num_received;
}
static void tsi108_rx_int(struct net_device *dev)
{
struct tsi108_prv_data *data = netdev_priv(dev);
/* A race could cause dev to already be scheduled, so it's not an
* error if that happens (and interrupts shouldn't be re-masked,
* because that can cause harmful races, if poll has already
* unmasked them but not cleared LINK_STATE_SCHED).
*
* This can happen if this code races with tsi108_poll(), which masks
* the interrupts after tsi108_irq_one() read the mask, but before
* netif_rx_schedule is called. It could also happen due to calls
* from tsi108_check_rxring().
*/
if (netif_rx_schedule_prep(dev, &data->napi)) {
/* Mask, rather than ack, the receive interrupts. The ack
* will happen in tsi108_poll().
*/
TSI_WRITE(TSI108_EC_INTMASK,
TSI_READ(TSI108_EC_INTMASK) |
TSI108_INT_RXQUEUE0
| TSI108_INT_RXTHRESH |
TSI108_INT_RXOVERRUN | TSI108_INT_RXERROR |
TSI108_INT_RXWAIT);
__netif_rx_schedule(dev, &data->napi);
} else {
if (!netif_running(dev)) {
/* This can happen if an interrupt occurs while the
* interface is being brought down, as the START
* bit is cleared before the stop function is called.
*
* In this case, the interrupts must be masked, or
* they will continue indefinitely.
*
* There's a race here if the interface is brought down
* and then up in rapid succession, as the device could
* be made running after the above check and before
* the masking below. This will only happen if the IRQ
* thread has a lower priority than the task brining
* up the interface. Fixing this race would likely
* require changes in generic code.
*/
TSI_WRITE(TSI108_EC_INTMASK,
TSI_READ
(TSI108_EC_INTMASK) |
TSI108_INT_RXQUEUE0 |
TSI108_INT_RXTHRESH |
TSI108_INT_RXOVERRUN |
TSI108_INT_RXERROR |
TSI108_INT_RXWAIT);
}
}
}
/* If the RX ring has run out of memory, try periodically
* to allocate some more, as otherwise poll would never
* get called (apart from the initial end-of-queue condition).
*
* This is called once per second (by default) from the thread.
*/
static void tsi108_check_rxring(struct net_device *dev)
{
struct tsi108_prv_data *data = netdev_priv(dev);
/* A poll is scheduled, as opposed to caling tsi108_refill_rx
* directly, so as to keep the receive path single-threaded
* (and thus not needing a lock).
*/
if (netif_running(dev) && data->rxfree < TSI108_RXRING_LEN / 4)
tsi108_rx_int(dev);
}
static void tsi108_tx_int(struct net_device *dev)
{
struct tsi108_prv_data *data = netdev_priv(dev);
u32 estat = TSI_READ(TSI108_EC_TXESTAT);
TSI_WRITE(TSI108_EC_TXESTAT, estat);
TSI_WRITE(TSI108_EC_INTSTAT, TSI108_INT_TXQUEUE0 |
TSI108_INT_TXIDLE | TSI108_INT_TXERROR);
if (estat & TSI108_EC_TXESTAT_Q0_ERR) {
u32 err = TSI_READ(TSI108_EC_TXERR);
TSI_WRITE(TSI108_EC_TXERR, err);
if (err && net_ratelimit())
printk(KERN_ERR "%s: TX error %x\n", dev->name, err);
}
if (estat & (TSI108_EC_TXESTAT_Q0_DESCINT | TSI108_EC_TXESTAT_Q0_EOQ)) {
spin_lock(&data->txlock);
tsi108_complete_tx(dev);
spin_unlock(&data->txlock);
}
}
static irqreturn_t tsi108_irq(int irq, void *dev_id)
{
struct net_device *dev = dev_id;
struct tsi108_prv_data *data = netdev_priv(dev);
u32 stat = TSI_READ(TSI108_EC_INTSTAT);
if (!(stat & TSI108_INT_ANY))
return IRQ_NONE; /* Not our interrupt */
stat &= ~TSI_READ(TSI108_EC_INTMASK);
if (stat & (TSI108_INT_TXQUEUE0 | TSI108_INT_TXIDLE |
TSI108_INT_TXERROR))
tsi108_tx_int(dev);
if (stat & (TSI108_INT_RXQUEUE0 | TSI108_INT_RXTHRESH |
TSI108_INT_RXWAIT | TSI108_INT_RXOVERRUN |
TSI108_INT_RXERROR))
tsi108_rx_int(dev);
if (stat & TSI108_INT_SFN) {
if (net_ratelimit())
printk(KERN_DEBUG "%s: SFN error\n", dev->name);
TSI_WRITE(TSI108_EC_INTSTAT, TSI108_INT_SFN);
}
if (stat & TSI108_INT_STATCARRY) {
tsi108_stat_carry(dev);
TSI_WRITE(TSI108_EC_INTSTAT, TSI108_INT_STATCARRY);
}
return IRQ_HANDLED;
}
static void tsi108_stop_ethernet(struct net_device *dev)
{
struct tsi108_prv_data *data = netdev_priv(dev);
int i = 1000;
/* Disable all TX and RX queues ... */
TSI_WRITE(TSI108_EC_TXCTRL, 0);
TSI_WRITE(TSI108_EC_RXCTRL, 0);
/* ...and wait for them to become idle */
while(i--) {
if(!(TSI_READ(TSI108_EC_TXSTAT) & TSI108_EC_TXSTAT_ACTIVE))
break;
udelay(10);
}
i = 1000;
while(i--){
if(!(TSI_READ(TSI108_EC_RXSTAT) & TSI108_EC_RXSTAT_ACTIVE))
return;
udelay(10);
}
printk(KERN_ERR "%s function time out \n", __FUNCTION__);
}
static void tsi108_reset_ether(struct tsi108_prv_data * data)
{
TSI_WRITE(TSI108_MAC_CFG1, TSI108_MAC_CFG1_SOFTRST);
udelay(100);
TSI_WRITE(TSI108_MAC_CFG1, 0);
TSI_WRITE(TSI108_EC_PORTCTRL, TSI108_EC_PORTCTRL_STATRST);
udelay(100);
TSI_WRITE(TSI108_EC_PORTCTRL,
TSI_READ(TSI108_EC_PORTCTRL) &
~TSI108_EC_PORTCTRL_STATRST);
TSI_WRITE(TSI108_EC_TXCFG, TSI108_EC_TXCFG_RST);
udelay(100);
TSI_WRITE(TSI108_EC_TXCFG,
TSI_READ(TSI108_EC_TXCFG) &
~TSI108_EC_TXCFG_RST);
TSI_WRITE(TSI108_EC_RXCFG, TSI108_EC_RXCFG_RST);
udelay(100);
TSI_WRITE(TSI108_EC_RXCFG,
TSI_READ(TSI108_EC_RXCFG) &
~TSI108_EC_RXCFG_RST);
TSI_WRITE(TSI108_MAC_MII_MGMT_CFG,
TSI_READ(TSI108_MAC_MII_MGMT_CFG) |
TSI108_MAC_MII_MGMT_RST);
udelay(100);
TSI_WRITE(TSI108_MAC_MII_MGMT_CFG,
(TSI_READ(TSI108_MAC_MII_MGMT_CFG) &
~(TSI108_MAC_MII_MGMT_RST |
TSI108_MAC_MII_MGMT_CLK)) | 0x07);
}
static int tsi108_get_mac(struct net_device *dev)
{
struct tsi108_prv_data *data = netdev_priv(dev);
u32 word1 = TSI_READ(TSI108_MAC_ADDR1);
u32 word2 = TSI_READ(TSI108_MAC_ADDR2);
/* Note that the octets are reversed from what the manual says,
* producing an even weirder ordering...
*/
if (word2 == 0 && word1 == 0) {
dev->dev_addr[0] = 0x00;
dev->dev_addr[1] = 0x06;
dev->dev_addr[2] = 0xd2;
dev->dev_addr[3] = 0x00;
dev->dev_addr[4] = 0x00;
if (0x8 == data->phy)
dev->dev_addr[5] = 0x01;
else
dev->dev_addr[5] = 0x02;
word2 = (dev->dev_addr[0] << 16) | (dev->dev_addr[1] << 24);
word1 = (dev->dev_addr[2] << 0) | (dev->dev_addr[3] << 8) |
(dev->dev_addr[4] << 16) | (dev->dev_addr[5] << 24);
TSI_WRITE(TSI108_MAC_ADDR1, word1);
TSI_WRITE(TSI108_MAC_ADDR2, word2);
} else {
dev->dev_addr[0] = (word2 >> 16) & 0xff;
dev->dev_addr[1] = (word2 >> 24) & 0xff;
dev->dev_addr[2] = (word1 >> 0) & 0xff;
dev->dev_addr[3] = (word1 >> 8) & 0xff;
dev->dev_addr[4] = (word1 >> 16) & 0xff;
dev->dev_addr[5] = (word1 >> 24) & 0xff;
}
if (!is_valid_ether_addr(dev->dev_addr)) {
printk("KERN_ERR: word1: %08x, word2: %08x\n", word1, word2);
return -EINVAL;
}
return 0;
}
static int tsi108_set_mac(struct net_device *dev, void *addr)
{
struct tsi108_prv_data *data = netdev_priv(dev);
u32 word1, word2;
int i;
if (!is_valid_ether_addr(addr))
return -EINVAL;
for (i = 0; i < 6; i++)
/* +2 is for the offset of the HW addr type */
dev->dev_addr[i] = ((unsigned char *)addr)[i + 2];
word2 = (dev->dev_addr[0] << 16) | (dev->dev_addr[1] << 24);
word1 = (dev->dev_addr[2] << 0) | (dev->dev_addr[3] << 8) |
(dev->dev_addr[4] << 16) | (dev->dev_addr[5] << 24);
spin_lock_irq(&data->misclock);
TSI_WRITE(TSI108_MAC_ADDR1, word1);
TSI_WRITE(TSI108_MAC_ADDR2, word2);
spin_lock(&data->txlock);
if (data->txfree && data->link_up)
netif_wake_queue(dev);
spin_unlock(&data->txlock);
spin_unlock_irq(&data->misclock);
return 0;
}
/* Protected by dev->xmit_lock. */
static void tsi108_set_rx_mode(struct net_device *dev)
{
struct tsi108_prv_data *data = netdev_priv(dev);
u32 rxcfg = TSI_READ(TSI108_EC_RXCFG);
if (dev->flags & IFF_PROMISC) {
rxcfg &= ~(TSI108_EC_RXCFG_UC_HASH | TSI108_EC_RXCFG_MC_HASH);
rxcfg |= TSI108_EC_RXCFG_UFE | TSI108_EC_RXCFG_MFE;
goto out;
}
rxcfg &= ~(TSI108_EC_RXCFG_UFE | TSI108_EC_RXCFG_MFE);
if (dev->flags & IFF_ALLMULTI || dev->mc_count) {
int i;
struct dev_mc_list *mc = dev->mc_list;
rxcfg |= TSI108_EC_RXCFG_MFE | TSI108_EC_RXCFG_MC_HASH;
memset(data->mc_hash, 0, sizeof(data->mc_hash));
while (mc) {
u32 hash, crc;
if (mc->dmi_addrlen == 6) {
crc = ether_crc(6, mc->dmi_addr);
hash = crc >> 23;
__set_bit(hash, &data->mc_hash[0]);
} else {
printk(KERN_ERR
"%s: got multicast address of length %d "
"instead of 6.\n", dev->name,
mc->dmi_addrlen);
}
mc = mc->next;
}
TSI_WRITE(TSI108_EC_HASHADDR,
TSI108_EC_HASHADDR_AUTOINC |
TSI108_EC_HASHADDR_MCAST);
for (i = 0; i < 16; i++) {
/* The manual says that the hardware may drop
* back-to-back writes to the data register.
*/
udelay(1);
TSI_WRITE(TSI108_EC_HASHDATA,
data->mc_hash[i]);
}
}
out:
TSI_WRITE(TSI108_EC_RXCFG, rxcfg);
}
static void tsi108_init_phy(struct net_device *dev)
{
struct tsi108_prv_data *data = netdev_priv(dev);
u32 i = 0;
u16 phyval = 0;
unsigned long flags;
spin_lock_irqsave(&phy_lock, flags);
tsi108_write_mii(data, MII_BMCR, BMCR_RESET);
while (i--){
if(!(tsi108_read_mii(data, MII_BMCR) & BMCR_RESET))
break;
udelay(10);
}
if (i == 0)
printk(KERN_ERR "%s function time out \n", __FUNCTION__);
if (data->phy_type == TSI108_PHY_BCM54XX) {
tsi108_write_mii(data, 0x09, 0x0300);
tsi108_write_mii(data, 0x10, 0x1020);
tsi108_write_mii(data, 0x1c, 0x8c00);
}
tsi108_write_mii(data,
MII_BMCR,
BMCR_ANENABLE | BMCR_ANRESTART);
while (tsi108_read_mii(data, MII_BMCR) & BMCR_ANRESTART)
cpu_relax();
/* Set G/MII mode and receive clock select in TBI control #2. The
* second port won't work if this isn't done, even though we don't
* use TBI mode.
*/
tsi108_write_tbi(data, 0x11, 0x30);
/* FIXME: It seems to take more than 2 back-to-back reads to the
* PHY_STAT register before the link up status bit is set.
*/
data->link_up = 1;
while (!((phyval = tsi108_read_mii(data, MII_BMSR)) &
BMSR_LSTATUS)) {
if (i++ > (MII_READ_DELAY / 10)) {
data->link_up = 0;
break;
}
spin_unlock_irqrestore(&phy_lock, flags);
msleep(10);
spin_lock_irqsave(&phy_lock, flags);
}
printk(KERN_DEBUG "PHY_STAT reg contains %08x\n", phyval);
data->phy_ok = 1;
data->init_media = 1;
spin_unlock_irqrestore(&phy_lock, flags);
}
static void tsi108_kill_phy(struct net_device *dev)
{
struct tsi108_prv_data *data = netdev_priv(dev);
unsigned long flags;
spin_lock_irqsave(&phy_lock, flags);
tsi108_write_mii(data, MII_BMCR, BMCR_PDOWN);
data->phy_ok = 0;
spin_unlock_irqrestore(&phy_lock, flags);
}
static int tsi108_open(struct net_device *dev)
{
int i;
struct tsi108_prv_data *data = netdev_priv(dev);
unsigned int rxring_size = TSI108_RXRING_LEN * sizeof(rx_desc);
unsigned int txring_size = TSI108_TXRING_LEN * sizeof(tx_desc);
i = request_irq(data->irq_num, tsi108_irq, 0, dev->name, dev);
if (i != 0) {
printk(KERN_ERR "tsi108_eth%d: Could not allocate IRQ%d.\n",
data->id, data->irq_num);
return i;
} else {
dev->irq = data->irq_num;
printk(KERN_NOTICE
"tsi108_open : Port %d Assigned IRQ %d to %s\n",
data->id, dev->irq, dev->name);
}
data->rxring = dma_alloc_coherent(NULL, rxring_size,
&data->rxdma, GFP_KERNEL);
if (!data->rxring) {
printk(KERN_DEBUG
"TSI108_ETH: failed to allocate memory for rxring!\n");
return -ENOMEM;
} else {
memset(data->rxring, 0, rxring_size);
}
data->txring = dma_alloc_coherent(NULL, txring_size,
&data->txdma, GFP_KERNEL);
if (!data->txring) {
printk(KERN_DEBUG
"TSI108_ETH: failed to allocate memory for txring!\n");
pci_free_consistent(0, rxring_size, data->rxring, data->rxdma);
return -ENOMEM;
} else {
memset(data->txring, 0, txring_size);
}
for (i = 0; i < TSI108_RXRING_LEN; i++) {
data->rxring[i].next0 = data->rxdma + (i + 1) * sizeof(rx_desc);
data->rxring[i].blen = TSI108_RXBUF_SIZE;
data->rxring[i].vlan = 0;
}
data->rxring[TSI108_RXRING_LEN - 1].next0 = data->rxdma;
data->rxtail = 0;
data->rxhead = 0;
for (i = 0; i < TSI108_RXRING_LEN; i++) {
struct sk_buff *skb = dev_alloc_skb(TSI108_RXBUF_SIZE + NET_IP_ALIGN);
if (!skb) {
/* Bah. No memory for now, but maybe we'll get
* some more later.
* For now, we'll live with the smaller ring.
*/
printk(KERN_WARNING
"%s: Could only allocate %d receive skb(s).\n",
dev->name, i);
data->rxhead = i;
break;
}
data->rxskbs[i] = skb;
/* Align the payload on a 4-byte boundary */
skb_reserve(skb, 2);
data->rxskbs[i] = skb;
data->rxring[i].buf0 = virt_to_phys(data->rxskbs[i]->data);
data->rxring[i].misc = TSI108_RX_OWN | TSI108_RX_INT;
}
data->rxfree = i;
TSI_WRITE(TSI108_EC_RXQ_PTRLOW, data->rxdma);
for (i = 0; i < TSI108_TXRING_LEN; i++) {
data->txring[i].next0 = data->txdma + (i + 1) * sizeof(tx_desc);
data->txring[i].misc = 0;
}
data->txring[TSI108_TXRING_LEN - 1].next0 = data->txdma;
data->txtail = 0;
data->txhead = 0;
data->txfree = TSI108_TXRING_LEN;
TSI_WRITE(TSI108_EC_TXQ_PTRLOW, data->txdma);
tsi108_init_phy(dev);
napi_enable(&data->napi);
setup_timer(&data->timer, tsi108_timed_checker, (unsigned long)dev);
mod_timer(&data->timer, jiffies + 1);
tsi108_restart_rx(data, dev);
TSI_WRITE(TSI108_EC_INTSTAT, ~0);
TSI_WRITE(TSI108_EC_INTMASK,
~(TSI108_INT_TXQUEUE0 | TSI108_INT_RXERROR |
TSI108_INT_RXTHRESH | TSI108_INT_RXQUEUE0 |
TSI108_INT_RXOVERRUN | TSI108_INT_RXWAIT |
TSI108_INT_SFN | TSI108_INT_STATCARRY));
TSI_WRITE(TSI108_MAC_CFG1,
TSI108_MAC_CFG1_RXEN | TSI108_MAC_CFG1_TXEN);
netif_start_queue(dev);
return 0;
}
static int tsi108_close(struct net_device *dev)
{
struct tsi108_prv_data *data = netdev_priv(dev);
netif_stop_queue(dev);
napi_disable(&data->napi);
del_timer_sync(&data->timer);
tsi108_stop_ethernet(dev);
tsi108_kill_phy(dev);
TSI_WRITE(TSI108_EC_INTMASK, ~0);
TSI_WRITE(TSI108_MAC_CFG1, 0);
/* Check for any pending TX packets, and drop them. */
while (!data->txfree || data->txhead != data->txtail) {
int tx = data->txtail;
struct sk_buff *skb;
skb = data->txskbs[tx];
data->txtail = (data->txtail + 1) % TSI108_TXRING_LEN;
data->txfree++;
dev_kfree_skb(skb);
}
synchronize_irq(data->irq_num);
free_irq(data->irq_num, dev);
/* Discard the RX ring. */
while (data->rxfree) {
int rx = data->rxtail;
struct sk_buff *skb;
skb = data->rxskbs[rx];
data->rxtail = (data->rxtail + 1) % TSI108_RXRING_LEN;
data->rxfree--;
dev_kfree_skb(skb);
}
dma_free_coherent(0,
TSI108_RXRING_LEN * sizeof(rx_desc),
data->rxring, data->rxdma);
dma_free_coherent(0,
TSI108_TXRING_LEN * sizeof(tx_desc),
data->txring, data->txdma);
return 0;
}
static void tsi108_init_mac(struct net_device *dev)
{
struct tsi108_prv_data *data = netdev_priv(dev);
TSI_WRITE(TSI108_MAC_CFG2, TSI108_MAC_CFG2_DFLT_PREAMBLE |
TSI108_MAC_CFG2_PADCRC);
TSI_WRITE(TSI108_EC_TXTHRESH,
(192 << TSI108_EC_TXTHRESH_STARTFILL) |
(192 << TSI108_EC_TXTHRESH_STOPFILL));
TSI_WRITE(TSI108_STAT_CARRYMASK1,
~(TSI108_STAT_CARRY1_RXBYTES |
TSI108_STAT_CARRY1_RXPKTS |
TSI108_STAT_CARRY1_RXFCS |
TSI108_STAT_CARRY1_RXMCAST |
TSI108_STAT_CARRY1_RXALIGN |
TSI108_STAT_CARRY1_RXLENGTH |
TSI108_STAT_CARRY1_RXRUNT |
TSI108_STAT_CARRY1_RXJUMBO |
TSI108_STAT_CARRY1_RXFRAG |
TSI108_STAT_CARRY1_RXJABBER |
TSI108_STAT_CARRY1_RXDROP));
TSI_WRITE(TSI108_STAT_CARRYMASK2,
~(TSI108_STAT_CARRY2_TXBYTES |
TSI108_STAT_CARRY2_TXPKTS |
TSI108_STAT_CARRY2_TXEXDEF |
TSI108_STAT_CARRY2_TXEXCOL |
TSI108_STAT_CARRY2_TXTCOL |
TSI108_STAT_CARRY2_TXPAUSE));
TSI_WRITE(TSI108_EC_PORTCTRL, TSI108_EC_PORTCTRL_STATEN);
TSI_WRITE(TSI108_MAC_CFG1, 0);
TSI_WRITE(TSI108_EC_RXCFG,
TSI108_EC_RXCFG_SE | TSI108_EC_RXCFG_BFE);
TSI_WRITE(TSI108_EC_TXQ_CFG, TSI108_EC_TXQ_CFG_DESC_INT |
TSI108_EC_TXQ_CFG_EOQ_OWN_INT |
TSI108_EC_TXQ_CFG_WSWP | (TSI108_PBM_PORT <<
TSI108_EC_TXQ_CFG_SFNPORT));
TSI_WRITE(TSI108_EC_RXQ_CFG, TSI108_EC_RXQ_CFG_DESC_INT |
TSI108_EC_RXQ_CFG_EOQ_OWN_INT |
TSI108_EC_RXQ_CFG_WSWP | (TSI108_PBM_PORT <<
TSI108_EC_RXQ_CFG_SFNPORT));
TSI_WRITE(TSI108_EC_TXQ_BUFCFG,
TSI108_EC_TXQ_BUFCFG_BURST256 |
TSI108_EC_TXQ_BUFCFG_BSWP | (TSI108_PBM_PORT <<
TSI108_EC_TXQ_BUFCFG_SFNPORT));
TSI_WRITE(TSI108_EC_RXQ_BUFCFG,
TSI108_EC_RXQ_BUFCFG_BURST256 |
TSI108_EC_RXQ_BUFCFG_BSWP | (TSI108_PBM_PORT <<
TSI108_EC_RXQ_BUFCFG_SFNPORT));
TSI_WRITE(TSI108_EC_INTMASK, ~0);
}
static int tsi108_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
{
struct tsi108_prv_data *data = netdev_priv(dev);
return generic_mii_ioctl(&data->mii_if, if_mii(rq), cmd, NULL);
}
static int
tsi108_init_one(struct platform_device *pdev)
{
struct net_device *dev = NULL;
struct tsi108_prv_data *data = NULL;
hw_info *einfo;
int err = 0;
einfo = pdev->dev.platform_data;
if (NULL == einfo) {
printk(KERN_ERR "tsi-eth %d: Missing additional data!\n",
pdev->id);
return -ENODEV;
}
/* Create an ethernet device instance */
dev = alloc_etherdev(sizeof(struct tsi108_prv_data));
if (!dev) {
printk("tsi108_eth: Could not allocate a device structure\n");
return -ENOMEM;
}
printk("tsi108_eth%d: probe...\n", pdev->id);
data = netdev_priv(dev);
data->dev = dev;
pr_debug("tsi108_eth%d:regs:phyresgs:phy:irq_num=0x%x:0x%x:0x%x:0x%x\n",
pdev->id, einfo->regs, einfo->phyregs,
einfo->phy, einfo->irq_num);
data->regs = ioremap(einfo->regs, 0x400);
if (NULL == data->regs) {
err = -ENOMEM;
goto regs_fail;
}
data->phyregs = ioremap(einfo->phyregs, 0x400);
if (NULL == data->phyregs) {
err = -ENOMEM;
goto regs_fail;
}
/* MII setup */
data->mii_if.dev = dev;
data->mii_if.mdio_read = tsi108_mdio_read;
data->mii_if.mdio_write = tsi108_mdio_write;
data->mii_if.phy_id = einfo->phy;
data->mii_if.phy_id_mask = 0x1f;
data->mii_if.reg_num_mask = 0x1f;
data->mii_if.supports_gmii = mii_check_gmii_support(&data->mii_if);
data->phy = einfo->phy;
data->phy_type = einfo->phy_type;
data->irq_num = einfo->irq_num;
data->id = pdev->id;
dev->open = tsi108_open;
dev->stop = tsi108_close;
dev->hard_start_xmit = tsi108_send_packet;
dev->set_mac_address = tsi108_set_mac;
dev->set_multicast_list = tsi108_set_rx_mode;
dev->get_stats = tsi108_get_stats;
netif_napi_add(dev, &data->napi, tsi108_poll, 64);
dev->do_ioctl = tsi108_do_ioctl;
/* Apparently, the Linux networking code won't use scatter-gather
* if the hardware doesn't do checksums. However, it's faster
* to checksum in place and use SG, as (among other reasons)
* the cache won't be dirtied (which then has to be flushed
* before DMA). The checksumming is done by the driver (via
* a new function skb_csum_dev() in net/core/skbuff.c).
*/
dev->features = NETIF_F_HIGHDMA;
SET_MODULE_OWNER(dev);
spin_lock_init(&data->txlock);
spin_lock_init(&data->misclock);
tsi108_reset_ether(data);
tsi108_kill_phy(dev);
if ((err = tsi108_get_mac(dev)) != 0) {
printk(KERN_ERR "%s: Invalid MAC address. Please correct.\n",
dev->name);
goto register_fail;
}
tsi108_init_mac(dev);
err = register_netdev(dev);
if (err) {
printk(KERN_ERR "%s: Cannot register net device, aborting.\n",
dev->name);
goto register_fail;
}
printk(KERN_INFO "%s: Tsi108 Gigabit Ethernet, MAC: "
"%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]);
#ifdef DEBUG
data->msg_enable = DEBUG;
dump_eth_one(dev);
#endif
return 0;
register_fail:
iounmap(data->regs);
iounmap(data->phyregs);
regs_fail:
free_netdev(dev);
return err;
}
/* There's no way to either get interrupts from the PHY when
* something changes, or to have the Tsi108 automatically communicate
* with the PHY to reconfigure itself.
*
* Thus, we have to do it using a timer.
*/
static void tsi108_timed_checker(unsigned long dev_ptr)
{
struct net_device *dev = (struct net_device *)dev_ptr;
struct tsi108_prv_data *data = netdev_priv(dev);
tsi108_check_phy(dev);
tsi108_check_rxring(dev);
mod_timer(&data->timer, jiffies + CHECK_PHY_INTERVAL);
}
static int tsi108_ether_init(void)
{
int ret;
ret = platform_driver_register (&tsi_eth_driver);
if (ret < 0){
printk("tsi108_ether_init: error initializing ethernet "
"device\n");
return ret;
}
return 0;
}
static int tsi108_ether_remove(struct platform_device *pdev)
{
struct net_device *dev = platform_get_drvdata(pdev);
struct tsi108_prv_data *priv = netdev_priv(dev);
unregister_netdev(dev);
tsi108_stop_ethernet(dev);
platform_set_drvdata(pdev, NULL);
iounmap(priv->regs);
iounmap(priv->phyregs);
free_netdev(dev);
return 0;
}
static void tsi108_ether_exit(void)
{
platform_driver_unregister(&tsi_eth_driver);
}
module_init(tsi108_ether_init);
module_exit(tsi108_ether_exit);
MODULE_AUTHOR("Tundra Semiconductor Corporation");
MODULE_DESCRIPTION("Tsi108 Gigabit Ethernet driver");
MODULE_LICENSE("GPL");
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