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linux/drivers/net/mv643xx_eth.c
Herbert Xu 364c6badde [NET]: Clean up skb_linearize 
The linearisation operation doesn't need to be super-optimised.  So we can
replace __skb_linearize with __pskb_pull_tail which does the same thing but
is more general.

Also, most users of skb_linearize end up testing whether the skb is linear
or not so it helps to make skb_linearize do just that.

Some callers of skb_linearize also use it to copy cloned data, so it's
useful to have a new function skb_linearize_cow to copy the data if it's
either non-linear or cloned.

Last but not least, I've removed the gfp argument since nobody uses it
anymore.  If it's ever needed we can easily add it back.

Misc bugs fixed by this patch:

* via-velocity error handling (also, no SG => no frags)

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-06-17 21:30:16 -07:00

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/*
* drivers/net/mv643xx_eth.c - Driver for MV643XX ethernet ports
* Copyright (C) 2002 Matthew Dharm <mdharm@momenco.com>
*
* Based on the 64360 driver from:
* Copyright (C) 2002 rabeeh@galileo.co.il
*
* Copyright (C) 2003 PMC-Sierra, Inc.,
* written by Manish Lachwani
*
* Copyright (C) 2003 Ralf Baechle <ralf@linux-mips.org>
*
* Copyright (C) 2004-2006 MontaVista Software, Inc.
* Dale Farnsworth <dale@farnsworth.org>
*
* Copyright (C) 2004 Steven J. Hill <sjhill1@rockwellcollins.com>
* <sjhill@realitydiluted.com>
*
* 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.
*/
#include <linux/init.h>
#include <linux/dma-mapping.h>
#include <linux/in.h>
#include <linux/ip.h>
#include <linux/tcp.h>
#include <linux/udp.h>
#include <linux/etherdevice.h>
#include <linux/bitops.h>
#include <linux/delay.h>
#include <linux/ethtool.h>
#include <linux/platform_device.h>
#include <asm/io.h>
#include <asm/types.h>
#include <asm/pgtable.h>
#include <asm/system.h>
#include <asm/delay.h>
#include "mv643xx_eth.h"
/* Static function declarations */
static void eth_port_uc_addr_get(struct net_device *dev,
unsigned char *MacAddr);
static void eth_port_set_multicast_list(struct net_device *);
static void mv643xx_eth_port_enable_tx(unsigned int port_num,
unsigned int queues);
static void mv643xx_eth_port_enable_rx(unsigned int port_num,
unsigned int queues);
static unsigned int mv643xx_eth_port_disable_tx(unsigned int port_num);
static unsigned int mv643xx_eth_port_disable_rx(unsigned int port_num);
static int mv643xx_eth_open(struct net_device *);
static int mv643xx_eth_stop(struct net_device *);
static int mv643xx_eth_change_mtu(struct net_device *, int);
static struct net_device_stats *mv643xx_eth_get_stats(struct net_device *);
static void eth_port_init_mac_tables(unsigned int eth_port_num);
#ifdef MV643XX_NAPI
static int mv643xx_poll(struct net_device *dev, int *budget);
#endif
static int ethernet_phy_get(unsigned int eth_port_num);
static void ethernet_phy_set(unsigned int eth_port_num, int phy_addr);
static int ethernet_phy_detect(unsigned int eth_port_num);
static int mv643xx_mdio_read(struct net_device *dev, int phy_id, int location);
static void mv643xx_mdio_write(struct net_device *dev, int phy_id, int location, int val);
static int mv643xx_eth_do_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd);
static struct ethtool_ops mv643xx_ethtool_ops;
static char mv643xx_driver_name[] = "mv643xx_eth";
static char mv643xx_driver_version[] = "1.0";
static void __iomem *mv643xx_eth_shared_base;
/* used to protect MV643XX_ETH_SMI_REG, which is shared across ports */
static DEFINE_SPINLOCK(mv643xx_eth_phy_lock);
static inline u32 mv_read(int offset)
{
void __iomem *reg_base;
reg_base = mv643xx_eth_shared_base - MV643XX_ETH_SHARED_REGS;
return readl(reg_base + offset);
}
static inline void mv_write(int offset, u32 data)
{
void __iomem *reg_base;
reg_base = mv643xx_eth_shared_base - MV643XX_ETH_SHARED_REGS;
writel(data, reg_base + offset);
}
/*
* Changes MTU (maximum transfer unit) of the gigabit ethenret port
*
* Input : pointer to ethernet interface network device structure
* new mtu size
* Output : 0 upon success, -EINVAL upon failure
*/
static int mv643xx_eth_change_mtu(struct net_device *dev, int new_mtu)
{
if ((new_mtu > 9500) || (new_mtu < 64))
return -EINVAL;
dev->mtu = new_mtu;
/*
* Stop then re-open the interface. This will allocate RX skb's with
* the new MTU.
* There is a possible danger that the open will not successed, due
* to memory is full, which might fail the open function.
*/
if (netif_running(dev)) {
mv643xx_eth_stop(dev);
if (mv643xx_eth_open(dev))
printk(KERN_ERR
"%s: Fatal error on opening device\n",
dev->name);
}
return 0;
}
/*
* mv643xx_eth_rx_refill_descs
*
* Fills / refills RX queue on a certain gigabit ethernet port
*
* Input : pointer to ethernet interface network device structure
* Output : N/A
*/
static void mv643xx_eth_rx_refill_descs(struct net_device *dev)
{
struct mv643xx_private *mp = netdev_priv(dev);
struct pkt_info pkt_info;
struct sk_buff *skb;
int unaligned;
while (mp->rx_desc_count < mp->rx_ring_size) {
skb = dev_alloc_skb(ETH_RX_SKB_SIZE + ETH_DMA_ALIGN);
if (!skb)
break;
mp->rx_desc_count++;
unaligned = (u32)skb->data & (ETH_DMA_ALIGN - 1);
if (unaligned)
skb_reserve(skb, ETH_DMA_ALIGN - unaligned);
pkt_info.cmd_sts = ETH_RX_ENABLE_INTERRUPT;
pkt_info.byte_cnt = ETH_RX_SKB_SIZE;
pkt_info.buf_ptr = dma_map_single(NULL, skb->data,
ETH_RX_SKB_SIZE, DMA_FROM_DEVICE);
pkt_info.return_info = skb;
if (eth_rx_return_buff(mp, &pkt_info) != ETH_OK) {
printk(KERN_ERR
"%s: Error allocating RX Ring\n", dev->name);
break;
}
skb_reserve(skb, ETH_HW_IP_ALIGN);
}
/*
* If RX ring is empty of SKB, set a timer to try allocating
* again at a later time.
*/
if (mp->rx_desc_count == 0) {
printk(KERN_INFO "%s: Rx ring is empty\n", dev->name);
mp->timeout.expires = jiffies + (HZ / 10); /* 100 mSec */
add_timer(&mp->timeout);
}
}
/*
* mv643xx_eth_rx_refill_descs_timer_wrapper
*
* Timer routine to wake up RX queue filling task. This function is
* used only in case the RX queue is empty, and all alloc_skb has
* failed (due to out of memory event).
*
* Input : pointer to ethernet interface network device structure
* Output : N/A
*/
static inline void mv643xx_eth_rx_refill_descs_timer_wrapper(unsigned long data)
{
mv643xx_eth_rx_refill_descs((struct net_device *)data);
}
/*
* mv643xx_eth_update_mac_address
*
* Update the MAC address of the port in the address table
*
* Input : pointer to ethernet interface network device structure
* Output : N/A
*/
static void mv643xx_eth_update_mac_address(struct net_device *dev)
{
struct mv643xx_private *mp = netdev_priv(dev);
unsigned int port_num = mp->port_num;
eth_port_init_mac_tables(port_num);
eth_port_uc_addr_set(port_num, dev->dev_addr);
}
/*
* mv643xx_eth_set_rx_mode
*
* Change from promiscuos to regular rx mode
*
* Input : pointer to ethernet interface network device structure
* Output : N/A
*/
static void mv643xx_eth_set_rx_mode(struct net_device *dev)
{
struct mv643xx_private *mp = netdev_priv(dev);
u32 config_reg;
config_reg = mv_read(MV643XX_ETH_PORT_CONFIG_REG(mp->port_num));
if (dev->flags & IFF_PROMISC)
config_reg |= (u32) MV643XX_ETH_UNICAST_PROMISCUOUS_MODE;
else
config_reg &= ~(u32) MV643XX_ETH_UNICAST_PROMISCUOUS_MODE;
mv_write(MV643XX_ETH_PORT_CONFIG_REG(mp->port_num), config_reg);
eth_port_set_multicast_list(dev);
}
/*
* mv643xx_eth_set_mac_address
*
* Change the interface's mac address.
* No special hardware thing should be done because interface is always
* put in promiscuous mode.
*
* Input : pointer to ethernet interface network device structure and
* a pointer to the designated entry to be added to the cache.
* Output : zero upon success, negative upon failure
*/
static int mv643xx_eth_set_mac_address(struct net_device *dev, void *addr)
{
int i;
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];
mv643xx_eth_update_mac_address(dev);
return 0;
}
/*
* mv643xx_eth_tx_timeout
*
* Called upon a timeout on transmitting a packet
*
* Input : pointer to ethernet interface network device structure.
* Output : N/A
*/
static void mv643xx_eth_tx_timeout(struct net_device *dev)
{
struct mv643xx_private *mp = netdev_priv(dev);
printk(KERN_INFO "%s: TX timeout ", dev->name);
/* Do the reset outside of interrupt context */
schedule_work(&mp->tx_timeout_task);
}
/*
* mv643xx_eth_tx_timeout_task
*
* Actual routine to reset the adapter when a timeout on Tx has occurred
*/
static void mv643xx_eth_tx_timeout_task(struct net_device *dev)
{
struct mv643xx_private *mp = netdev_priv(dev);
if (!netif_running(dev))
return;
netif_stop_queue(dev);
eth_port_reset(mp->port_num);
eth_port_start(dev);
if (mp->tx_ring_size - mp->tx_desc_count >= MAX_DESCS_PER_SKB)
netif_wake_queue(dev);
}
/**
* mv643xx_eth_free_tx_descs - Free the tx desc data for completed descriptors
*
* If force is non-zero, frees uncompleted descriptors as well
*/
int mv643xx_eth_free_tx_descs(struct net_device *dev, int force)
{
struct mv643xx_private *mp = netdev_priv(dev);
struct eth_tx_desc *desc;
u32 cmd_sts;
struct sk_buff *skb;
unsigned long flags;
int tx_index;
dma_addr_t addr;
int count;
int released = 0;
while (mp->tx_desc_count > 0) {
spin_lock_irqsave(&mp->lock, flags);
tx_index = mp->tx_used_desc_q;
desc = &mp->p_tx_desc_area[tx_index];
cmd_sts = desc->cmd_sts;
if (!force && (cmd_sts & ETH_BUFFER_OWNED_BY_DMA)) {
spin_unlock_irqrestore(&mp->lock, flags);
return released;
}
mp->tx_used_desc_q = (tx_index + 1) % mp->tx_ring_size;
mp->tx_desc_count--;
addr = desc->buf_ptr;
count = desc->byte_cnt;
skb = mp->tx_skb[tx_index];
if (skb)
mp->tx_skb[tx_index] = NULL;
spin_unlock_irqrestore(&mp->lock, flags);
if (cmd_sts & ETH_ERROR_SUMMARY) {
printk("%s: Error in TX\n", dev->name);
mp->stats.tx_errors++;
}
if (cmd_sts & ETH_TX_FIRST_DESC)
dma_unmap_single(NULL, addr, count, DMA_TO_DEVICE);
else
dma_unmap_page(NULL, addr, count, DMA_TO_DEVICE);
if (skb)
dev_kfree_skb_irq(skb);
released = 1;
}
return released;
}
static void mv643xx_eth_free_completed_tx_descs(struct net_device *dev)
{
struct mv643xx_private *mp = netdev_priv(dev);
if (mv643xx_eth_free_tx_descs(dev, 0) &&
mp->tx_ring_size - mp->tx_desc_count >= MAX_DESCS_PER_SKB)
netif_wake_queue(dev);
}
static void mv643xx_eth_free_all_tx_descs(struct net_device *dev)
{
mv643xx_eth_free_tx_descs(dev, 1);
}
/*
* mv643xx_eth_receive
*
* This function is forward packets that are received from the port's
* queues toward kernel core or FastRoute them to another interface.
*
* Input : dev - a pointer to the required interface
* max - maximum number to receive (0 means unlimted)
*
* Output : number of served packets
*/
static int mv643xx_eth_receive_queue(struct net_device *dev, int budget)
{
struct mv643xx_private *mp = netdev_priv(dev);
struct net_device_stats *stats = &mp->stats;
unsigned int received_packets = 0;
struct sk_buff *skb;
struct pkt_info pkt_info;
while (budget-- > 0 && eth_port_receive(mp, &pkt_info) == ETH_OK) {
mp->rx_desc_count--;
received_packets++;
/*
* Update statistics.
* Note byte count includes 4 byte CRC count
*/
stats->rx_packets++;
stats->rx_bytes += pkt_info.byte_cnt;
skb = pkt_info.return_info;
/*
* In case received a packet without first / last bits on OR
* the error summary bit is on, the packets needs to be dropeed.
*/
if (((pkt_info.cmd_sts
& (ETH_RX_FIRST_DESC | ETH_RX_LAST_DESC)) !=
(ETH_RX_FIRST_DESC | ETH_RX_LAST_DESC))
|| (pkt_info.cmd_sts & ETH_ERROR_SUMMARY)) {
stats->rx_dropped++;
if ((pkt_info.cmd_sts & (ETH_RX_FIRST_DESC |
ETH_RX_LAST_DESC)) !=
(ETH_RX_FIRST_DESC | ETH_RX_LAST_DESC)) {
if (net_ratelimit())
printk(KERN_ERR
"%s: Received packet spread "
"on multiple descriptors\n",
dev->name);
}
if (pkt_info.cmd_sts & ETH_ERROR_SUMMARY)
stats->rx_errors++;
dev_kfree_skb_irq(skb);
} else {
/*
* The -4 is for the CRC in the trailer of the
* received packet
*/
skb_put(skb, pkt_info.byte_cnt - 4);
skb->dev = dev;
if (pkt_info.cmd_sts & ETH_LAYER_4_CHECKSUM_OK) {
skb->ip_summed = CHECKSUM_UNNECESSARY;
skb->csum = htons(
(pkt_info.cmd_sts & 0x0007fff8) >> 3);
}
skb->protocol = eth_type_trans(skb, dev);
#ifdef MV643XX_NAPI
netif_receive_skb(skb);
#else
netif_rx(skb);
#endif
}
dev->last_rx = jiffies;
}
mv643xx_eth_rx_refill_descs(dev); /* Fill RX ring with skb's */
return received_packets;
}
/* Set the mv643xx port configuration register for the speed/duplex mode. */
static void mv643xx_eth_update_pscr(struct net_device *dev,
struct ethtool_cmd *ecmd)
{
struct mv643xx_private *mp = netdev_priv(dev);
int port_num = mp->port_num;
u32 o_pscr, n_pscr;
unsigned int queues;
o_pscr = mv_read(MV643XX_ETH_PORT_SERIAL_CONTROL_REG(port_num));
n_pscr = o_pscr;
/* clear speed, duplex and rx buffer size fields */
n_pscr &= ~(MV643XX_ETH_SET_MII_SPEED_TO_100 |
MV643XX_ETH_SET_GMII_SPEED_TO_1000 |
MV643XX_ETH_SET_FULL_DUPLEX_MODE |
MV643XX_ETH_MAX_RX_PACKET_MASK);
if (ecmd->duplex == DUPLEX_FULL)
n_pscr |= MV643XX_ETH_SET_FULL_DUPLEX_MODE;
if (ecmd->speed == SPEED_1000)
n_pscr |= MV643XX_ETH_SET_GMII_SPEED_TO_1000 |
MV643XX_ETH_MAX_RX_PACKET_9700BYTE;
else {
if (ecmd->speed == SPEED_100)
n_pscr |= MV643XX_ETH_SET_MII_SPEED_TO_100;
n_pscr |= MV643XX_ETH_MAX_RX_PACKET_1522BYTE;
}
if (n_pscr != o_pscr) {
if ((o_pscr & MV643XX_ETH_SERIAL_PORT_ENABLE) == 0)
mv_write(MV643XX_ETH_PORT_SERIAL_CONTROL_REG(port_num),
n_pscr);
else {
queues = mv643xx_eth_port_disable_tx(port_num);
o_pscr &= ~MV643XX_ETH_SERIAL_PORT_ENABLE;
mv_write(MV643XX_ETH_PORT_SERIAL_CONTROL_REG(port_num),
o_pscr);
mv_write(MV643XX_ETH_PORT_SERIAL_CONTROL_REG(port_num),
n_pscr);
mv_write(MV643XX_ETH_PORT_SERIAL_CONTROL_REG(port_num),
n_pscr);
if (queues)
mv643xx_eth_port_enable_tx(port_num, queues);
}
}
}
/*
* mv643xx_eth_int_handler
*
* Main interrupt handler for the gigbit ethernet ports
*
* Input : irq - irq number (not used)
* dev_id - a pointer to the required interface's data structure
* regs - not used
* Output : N/A
*/
static irqreturn_t mv643xx_eth_int_handler(int irq, void *dev_id,
struct pt_regs *regs)
{
struct net_device *dev = (struct net_device *)dev_id;
struct mv643xx_private *mp = netdev_priv(dev);
u32 eth_int_cause, eth_int_cause_ext = 0;
unsigned int port_num = mp->port_num;
/* Read interrupt cause registers */
eth_int_cause = mv_read(MV643XX_ETH_INTERRUPT_CAUSE_REG(port_num)) &
ETH_INT_UNMASK_ALL;
if (eth_int_cause & ETH_INT_CAUSE_EXT) {
eth_int_cause_ext = mv_read(
MV643XX_ETH_INTERRUPT_CAUSE_EXTEND_REG(port_num)) &
ETH_INT_UNMASK_ALL_EXT;
mv_write(MV643XX_ETH_INTERRUPT_CAUSE_EXTEND_REG(port_num),
~eth_int_cause_ext);
}
/* PHY status changed */
if (eth_int_cause_ext & ETH_INT_CAUSE_PHY) {
struct ethtool_cmd cmd;
if (mii_link_ok(&mp->mii)) {
mii_ethtool_gset(&mp->mii, &cmd);
mv643xx_eth_update_pscr(dev, &cmd);
mv643xx_eth_port_enable_tx(port_num,
ETH_TX_QUEUES_ENABLED);
if (!netif_carrier_ok(dev)) {
netif_carrier_on(dev);
if (mp->tx_ring_size - mp->tx_desc_count >=
MAX_DESCS_PER_SKB)
netif_wake_queue(dev);
}
} else if (netif_carrier_ok(dev)) {
netif_stop_queue(dev);
netif_carrier_off(dev);
}
}
#ifdef MV643XX_NAPI
if (eth_int_cause & ETH_INT_CAUSE_RX) {
/* schedule the NAPI poll routine to maintain port */
mv_write(MV643XX_ETH_INTERRUPT_MASK_REG(port_num),
ETH_INT_MASK_ALL);
/* wait for previous write to complete */
mv_read(MV643XX_ETH_INTERRUPT_MASK_REG(port_num));
netif_rx_schedule(dev);
}
#else
if (eth_int_cause & ETH_INT_CAUSE_RX)
mv643xx_eth_receive_queue(dev, INT_MAX);
#endif
if (eth_int_cause_ext & ETH_INT_CAUSE_TX)
mv643xx_eth_free_completed_tx_descs(dev);
/*
* If no real interrupt occured, exit.
* This can happen when using gigE interrupt coalescing mechanism.
*/
if ((eth_int_cause == 0x0) && (eth_int_cause_ext == 0x0))
return IRQ_NONE;
return IRQ_HANDLED;
}
#ifdef MV643XX_COAL
/*
* eth_port_set_rx_coal - Sets coalescing interrupt mechanism on RX path
*
* DESCRIPTION:
* This routine sets the RX coalescing interrupt mechanism parameter.
* This parameter is a timeout counter, that counts in 64 t_clk
* chunks ; that when timeout event occurs a maskable interrupt
* occurs.
* The parameter is calculated using the tClk of the MV-643xx chip
* , and the required delay of the interrupt in usec.
*
* INPUT:
* unsigned int eth_port_num Ethernet port number
* unsigned int t_clk t_clk of the MV-643xx chip in HZ units
* unsigned int delay Delay in usec
*
* OUTPUT:
* Interrupt coalescing mechanism value is set in MV-643xx chip.
*
* RETURN:
* The interrupt coalescing value set in the gigE port.
*
*/
static unsigned int eth_port_set_rx_coal(unsigned int eth_port_num,
unsigned int t_clk, unsigned int delay)
{
unsigned int coal = ((t_clk / 1000000) * delay) / 64;
/* Set RX Coalescing mechanism */
mv_write(MV643XX_ETH_SDMA_CONFIG_REG(eth_port_num),
((coal & 0x3fff) << 8) |
(mv_read(MV643XX_ETH_SDMA_CONFIG_REG(eth_port_num))
& 0xffc000ff));
return coal;
}
#endif
/*
* eth_port_set_tx_coal - Sets coalescing interrupt mechanism on TX path
*
* DESCRIPTION:
* This routine sets the TX coalescing interrupt mechanism parameter.
* This parameter is a timeout counter, that counts in 64 t_clk
* chunks ; that when timeout event occurs a maskable interrupt
* occurs.
* The parameter is calculated using the t_cLK frequency of the
* MV-643xx chip and the required delay in the interrupt in uSec
*
* INPUT:
* unsigned int eth_port_num Ethernet port number
* unsigned int t_clk t_clk of the MV-643xx chip in HZ units
* unsigned int delay Delay in uSeconds
*
* OUTPUT:
* Interrupt coalescing mechanism value is set in MV-643xx chip.
*
* RETURN:
* The interrupt coalescing value set in the gigE port.
*
*/
static unsigned int eth_port_set_tx_coal(unsigned int eth_port_num,
unsigned int t_clk, unsigned int delay)
{
unsigned int coal;
coal = ((t_clk / 1000000) * delay) / 64;
/* Set TX Coalescing mechanism */
mv_write(MV643XX_ETH_TX_FIFO_URGENT_THRESHOLD_REG(eth_port_num),
coal << 4);
return coal;
}
/*
* ether_init_rx_desc_ring - Curve a Rx chain desc list and buffer in memory.
*
* DESCRIPTION:
* This function prepares a Rx chained list of descriptors and packet
* buffers in a form of a ring. The routine must be called after port
* initialization routine and before port start routine.
* The Ethernet SDMA engine uses CPU bus addresses to access the various
* devices in the system (i.e. DRAM). This function uses the ethernet
* struct 'virtual to physical' routine (set by the user) to set the ring
* with physical addresses.
*
* INPUT:
* struct mv643xx_private *mp Ethernet Port Control srtuct.
*
* OUTPUT:
* The routine updates the Ethernet port control struct with information
* regarding the Rx descriptors and buffers.
*
* RETURN:
* None.
*/
static void ether_init_rx_desc_ring(struct mv643xx_private *mp)
{
volatile struct eth_rx_desc *p_rx_desc;
int rx_desc_num = mp->rx_ring_size;
int i;
/* initialize the next_desc_ptr links in the Rx descriptors ring */
p_rx_desc = (struct eth_rx_desc *)mp->p_rx_desc_area;
for (i = 0; i < rx_desc_num; i++) {
p_rx_desc[i].next_desc_ptr = mp->rx_desc_dma +
((i + 1) % rx_desc_num) * sizeof(struct eth_rx_desc);
}
/* Save Rx desc pointer to driver struct. */
mp->rx_curr_desc_q = 0;
mp->rx_used_desc_q = 0;
mp->rx_desc_area_size = rx_desc_num * sizeof(struct eth_rx_desc);
}
/*
* ether_init_tx_desc_ring - Curve a Tx chain desc list and buffer in memory.
*
* DESCRIPTION:
* This function prepares a Tx chained list of descriptors and packet
* buffers in a form of a ring. The routine must be called after port
* initialization routine and before port start routine.
* The Ethernet SDMA engine uses CPU bus addresses to access the various
* devices in the system (i.e. DRAM). This function uses the ethernet
* struct 'virtual to physical' routine (set by the user) to set the ring
* with physical addresses.
*
* INPUT:
* struct mv643xx_private *mp Ethernet Port Control srtuct.
*
* OUTPUT:
* The routine updates the Ethernet port control struct with information
* regarding the Tx descriptors and buffers.
*
* RETURN:
* None.
*/
static void ether_init_tx_desc_ring(struct mv643xx_private *mp)
{
int tx_desc_num = mp->tx_ring_size;
struct eth_tx_desc *p_tx_desc;
int i;
/* Initialize the next_desc_ptr links in the Tx descriptors ring */
p_tx_desc = (struct eth_tx_desc *)mp->p_tx_desc_area;
for (i = 0; i < tx_desc_num; i++) {
p_tx_desc[i].next_desc_ptr = mp->tx_desc_dma +
((i + 1) % tx_desc_num) * sizeof(struct eth_tx_desc);
}
mp->tx_curr_desc_q = 0;
mp->tx_used_desc_q = 0;
mp->tx_desc_area_size = tx_desc_num * sizeof(struct eth_tx_desc);
}
static int mv643xx_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
{
struct mv643xx_private *mp = netdev_priv(dev);
int err;
spin_lock_irq(&mp->lock);
err = mii_ethtool_sset(&mp->mii, cmd);
spin_unlock_irq(&mp->lock);
return err;
}
static int mv643xx_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
{
struct mv643xx_private *mp = netdev_priv(dev);
int err;
spin_lock_irq(&mp->lock);
err = mii_ethtool_gset(&mp->mii, cmd);
spin_unlock_irq(&mp->lock);
/* The PHY may support 1000baseT_Half, but the mv643xx does not */
cmd->supported &= ~SUPPORTED_1000baseT_Half;
cmd->advertising &= ~ADVERTISED_1000baseT_Half;
return err;
}
/*
* mv643xx_eth_open
*
* This function is called when openning the network device. The function
* should initialize all the hardware, initialize cyclic Rx/Tx
* descriptors chain and buffers and allocate an IRQ to the network
* device.
*
* Input : a pointer to the network device structure
*
* Output : zero of success , nonzero if fails.
*/
static int mv643xx_eth_open(struct net_device *dev)
{
struct mv643xx_private *mp = netdev_priv(dev);
unsigned int port_num = mp->port_num;
unsigned int size;
int err;
err = request_irq(dev->irq, mv643xx_eth_int_handler,
SA_SHIRQ | SA_SAMPLE_RANDOM, dev->name, dev);
if (err) {
printk(KERN_ERR "Can not assign IRQ number to MV643XX_eth%d\n",
port_num);
return -EAGAIN;
}
eth_port_init(mp);
memset(&mp->timeout, 0, sizeof(struct timer_list));
mp->timeout.function = mv643xx_eth_rx_refill_descs_timer_wrapper;
mp->timeout.data = (unsigned long)dev;
/* Allocate RX and TX skb rings */
mp->rx_skb = kmalloc(sizeof(*mp->rx_skb) * mp->rx_ring_size,
GFP_KERNEL);
if (!mp->rx_skb) {
printk(KERN_ERR "%s: Cannot allocate Rx skb ring\n", dev->name);
err = -ENOMEM;
goto out_free_irq;
}
mp->tx_skb = kmalloc(sizeof(*mp->tx_skb) * mp->tx_ring_size,
GFP_KERNEL);
if (!mp->tx_skb) {
printk(KERN_ERR "%s: Cannot allocate Tx skb ring\n", dev->name);
err = -ENOMEM;
goto out_free_rx_skb;
}
/* Allocate TX ring */
mp->tx_desc_count = 0;
size = mp->tx_ring_size * sizeof(struct eth_tx_desc);
mp->tx_desc_area_size = size;
if (mp->tx_sram_size) {
mp->p_tx_desc_area = ioremap(mp->tx_sram_addr,
mp->tx_sram_size);
mp->tx_desc_dma = mp->tx_sram_addr;
} else
mp->p_tx_desc_area = dma_alloc_coherent(NULL, size,
&mp->tx_desc_dma,
GFP_KERNEL);
if (!mp->p_tx_desc_area) {
printk(KERN_ERR "%s: Cannot allocate Tx Ring (size %d bytes)\n",
dev->name, size);
err = -ENOMEM;
goto out_free_tx_skb;
}
BUG_ON((u32) mp->p_tx_desc_area & 0xf); /* check 16-byte alignment */
memset((void *)mp->p_tx_desc_area, 0, mp->tx_desc_area_size);
ether_init_tx_desc_ring(mp);
/* Allocate RX ring */
mp->rx_desc_count = 0;
size = mp->rx_ring_size * sizeof(struct eth_rx_desc);
mp->rx_desc_area_size = size;
if (mp->rx_sram_size) {
mp->p_rx_desc_area = ioremap(mp->rx_sram_addr,
mp->rx_sram_size);
mp->rx_desc_dma = mp->rx_sram_addr;
} else
mp->p_rx_desc_area = dma_alloc_coherent(NULL, size,
&mp->rx_desc_dma,
GFP_KERNEL);
if (!mp->p_rx_desc_area) {
printk(KERN_ERR "%s: Cannot allocate Rx ring (size %d bytes)\n",
dev->name, size);
printk(KERN_ERR "%s: Freeing previously allocated TX queues...",
dev->name);
if (mp->rx_sram_size)
iounmap(mp->p_tx_desc_area);
else
dma_free_coherent(NULL, mp->tx_desc_area_size,
mp->p_tx_desc_area, mp->tx_desc_dma);
err = -ENOMEM;
goto out_free_tx_skb;
}
memset((void *)mp->p_rx_desc_area, 0, size);
ether_init_rx_desc_ring(mp);
mv643xx_eth_rx_refill_descs(dev); /* Fill RX ring with skb's */
/* Clear any pending ethernet port interrupts */
mv_write(MV643XX_ETH_INTERRUPT_CAUSE_REG(port_num), 0);
mv_write(MV643XX_ETH_INTERRUPT_CAUSE_EXTEND_REG(port_num), 0);
eth_port_start(dev);
/* Interrupt Coalescing */
#ifdef MV643XX_COAL
mp->rx_int_coal =
eth_port_set_rx_coal(port_num, 133000000, MV643XX_RX_COAL);
#endif
mp->tx_int_coal =
eth_port_set_tx_coal(port_num, 133000000, MV643XX_TX_COAL);
/* Unmask phy and link status changes interrupts */
mv_write(MV643XX_ETH_INTERRUPT_EXTEND_MASK_REG(port_num),
ETH_INT_UNMASK_ALL_EXT);
/* Unmask RX buffer and TX end interrupt */
mv_write(MV643XX_ETH_INTERRUPT_MASK_REG(port_num), ETH_INT_UNMASK_ALL);
return 0;
out_free_tx_skb:
kfree(mp->tx_skb);
out_free_rx_skb:
kfree(mp->rx_skb);
out_free_irq:
free_irq(dev->irq, dev);
return err;
}
static void mv643xx_eth_free_tx_rings(struct net_device *dev)
{
struct mv643xx_private *mp = netdev_priv(dev);
/* Stop Tx Queues */
mv643xx_eth_port_disable_tx(mp->port_num);
/* Free outstanding skb's on TX ring */
mv643xx_eth_free_all_tx_descs(dev);
BUG_ON(mp->tx_used_desc_q != mp->tx_curr_desc_q);
/* Free TX ring */
if (mp->tx_sram_size)
iounmap(mp->p_tx_desc_area);
else
dma_free_coherent(NULL, mp->tx_desc_area_size,
mp->p_tx_desc_area, mp->tx_desc_dma);
}
static void mv643xx_eth_free_rx_rings(struct net_device *dev)
{
struct mv643xx_private *mp = netdev_priv(dev);
unsigned int port_num = mp->port_num;
int curr;
/* Stop RX Queues */
mv643xx_eth_port_disable_rx(port_num);
/* Free preallocated skb's on RX rings */
for (curr = 0; mp->rx_desc_count && curr < mp->rx_ring_size; curr++) {
if (mp->rx_skb[curr]) {
dev_kfree_skb(mp->rx_skb[curr]);
mp->rx_desc_count--;
}
}
if (mp->rx_desc_count)
printk(KERN_ERR
"%s: Error in freeing Rx Ring. %d skb's still"
" stuck in RX Ring - ignoring them\n", dev->name,
mp->rx_desc_count);
/* Free RX ring */
if (mp->rx_sram_size)
iounmap(mp->p_rx_desc_area);
else
dma_free_coherent(NULL, mp->rx_desc_area_size,
mp->p_rx_desc_area, mp->rx_desc_dma);
}
/*
* mv643xx_eth_stop
*
* This function is used when closing the network device.
* It updates the hardware,
* release all memory that holds buffers and descriptors and release the IRQ.
* Input : a pointer to the device structure
* Output : zero if success , nonzero if fails
*/
static int mv643xx_eth_stop(struct net_device *dev)
{
struct mv643xx_private *mp = netdev_priv(dev);
unsigned int port_num = mp->port_num;
/* Mask all interrupts on ethernet port */
mv_write(MV643XX_ETH_INTERRUPT_MASK_REG(port_num), ETH_INT_MASK_ALL);
/* wait for previous write to complete */
mv_read(MV643XX_ETH_INTERRUPT_MASK_REG(port_num));
#ifdef MV643XX_NAPI
netif_poll_disable(dev);
#endif
netif_carrier_off(dev);
netif_stop_queue(dev);
eth_port_reset(mp->port_num);
mv643xx_eth_free_tx_rings(dev);
mv643xx_eth_free_rx_rings(dev);
#ifdef MV643XX_NAPI
netif_poll_enable(dev);
#endif
free_irq(dev->irq, dev);
return 0;
}
#ifdef MV643XX_NAPI
/*
* mv643xx_poll
*
* This function is used in case of NAPI
*/
static int mv643xx_poll(struct net_device *dev, int *budget)
{
struct mv643xx_private *mp = netdev_priv(dev);
int done = 1, orig_budget, work_done;
unsigned int port_num = mp->port_num;
#ifdef MV643XX_TX_FAST_REFILL
if (++mp->tx_clean_threshold > 5) {
mv643xx_eth_free_completed_tx_descs(dev);
mp->tx_clean_threshold = 0;
}
#endif
if ((mv_read(MV643XX_ETH_RX_CURRENT_QUEUE_DESC_PTR_0(port_num)))
!= (u32) mp->rx_used_desc_q) {
orig_budget = *budget;
if (orig_budget > dev->quota)
orig_budget = dev->quota;
work_done = mv643xx_eth_receive_queue(dev, orig_budget);
*budget -= work_done;
dev->quota -= work_done;
if (work_done >= orig_budget)
done = 0;
}
if (done) {
netif_rx_complete(dev);
mv_write(MV643XX_ETH_INTERRUPT_CAUSE_REG(port_num), 0);
mv_write(MV643XX_ETH_INTERRUPT_CAUSE_EXTEND_REG(port_num), 0);
mv_write(MV643XX_ETH_INTERRUPT_MASK_REG(port_num),
ETH_INT_UNMASK_ALL);
}
return done ? 0 : 1;
}
#endif
/**
* has_tiny_unaligned_frags - check if skb has any small, unaligned fragments
*
* Hardware can't handle unaligned fragments smaller than 9 bytes.
* This helper function detects that case.
*/
static inline unsigned int has_tiny_unaligned_frags(struct sk_buff *skb)
{
unsigned int frag;
skb_frag_t *fragp;
for (frag = 0; frag < skb_shinfo(skb)->nr_frags; frag++) {
fragp = &skb_shinfo(skb)->frags[frag];
if (fragp->size <= 8 && fragp->page_offset & 0x7)
return 1;
}
return 0;
}
/**
* eth_alloc_tx_desc_index - return the index of the next available tx desc
*/
static int eth_alloc_tx_desc_index(struct mv643xx_private *mp)
{
int tx_desc_curr;
BUG_ON(mp->tx_desc_count >= mp->tx_ring_size);
tx_desc_curr = mp->tx_curr_desc_q;
mp->tx_curr_desc_q = (tx_desc_curr + 1) % mp->tx_ring_size;
BUG_ON(mp->tx_curr_desc_q == mp->tx_used_desc_q);
return tx_desc_curr;
}
/**
* eth_tx_fill_frag_descs - fill tx hw descriptors for an skb's fragments.
*
* Ensure the data for each fragment to be transmitted is mapped properly,
* then fill in descriptors in the tx hw queue.
*/
static void eth_tx_fill_frag_descs(struct mv643xx_private *mp,
struct sk_buff *skb)
{
int frag;
int tx_index;
struct eth_tx_desc *desc;
for (frag = 0; frag < skb_shinfo(skb)->nr_frags; frag++) {
skb_frag_t *this_frag = &skb_shinfo(skb)->frags[frag];
tx_index = eth_alloc_tx_desc_index(mp);
desc = &mp->p_tx_desc_area[tx_index];
desc->cmd_sts = ETH_BUFFER_OWNED_BY_DMA;
/* Last Frag enables interrupt and frees the skb */
if (frag == (skb_shinfo(skb)->nr_frags - 1)) {
desc->cmd_sts |= ETH_ZERO_PADDING |
ETH_TX_LAST_DESC |
ETH_TX_ENABLE_INTERRUPT;
mp->tx_skb[tx_index] = skb;
} else
mp->tx_skb[tx_index] = 0;
desc = &mp->p_tx_desc_area[tx_index];
desc->l4i_chk = 0;
desc->byte_cnt = this_frag->size;
desc->buf_ptr = dma_map_page(NULL, this_frag->page,
this_frag->page_offset,
this_frag->size,
DMA_TO_DEVICE);
}
}
/**
* eth_tx_submit_descs_for_skb - submit data from an skb to the tx hw
*
* Ensure the data for an skb to be transmitted is mapped properly,
* then fill in descriptors in the tx hw queue and start the hardware.
*/
static void eth_tx_submit_descs_for_skb(struct mv643xx_private *mp,
struct sk_buff *skb)
{
int tx_index;
struct eth_tx_desc *desc;
u32 cmd_sts;
int length;
int nr_frags = skb_shinfo(skb)->nr_frags;
cmd_sts = ETH_TX_FIRST_DESC | ETH_GEN_CRC | ETH_BUFFER_OWNED_BY_DMA;
tx_index = eth_alloc_tx_desc_index(mp);
desc = &mp->p_tx_desc_area[tx_index];
if (nr_frags) {
eth_tx_fill_frag_descs(mp, skb);
length = skb_headlen(skb);
mp->tx_skb[tx_index] = 0;
} else {
cmd_sts |= ETH_ZERO_PADDING |
ETH_TX_LAST_DESC |
ETH_TX_ENABLE_INTERRUPT;
length = skb->len;
mp->tx_skb[tx_index] = skb;
}
desc->byte_cnt = length;
desc->buf_ptr = dma_map_single(NULL, skb->data, length, DMA_TO_DEVICE);
if (skb->ip_summed == CHECKSUM_HW) {
BUG_ON(skb->protocol != ETH_P_IP);
cmd_sts |= ETH_GEN_TCP_UDP_CHECKSUM |
ETH_GEN_IP_V_4_CHECKSUM |
skb->nh.iph->ihl << ETH_TX_IHL_SHIFT;
switch (skb->nh.iph->protocol) {
case IPPROTO_UDP:
cmd_sts |= ETH_UDP_FRAME;
desc->l4i_chk = skb->h.uh->check;
break;
case IPPROTO_TCP:
desc->l4i_chk = skb->h.th->check;
break;
default:
BUG();
}
} else {
/* Errata BTS #50, IHL must be 5 if no HW checksum */
cmd_sts |= 5 << ETH_TX_IHL_SHIFT;
desc->l4i_chk = 0;
}
/* ensure all other descriptors are written before first cmd_sts */
wmb();
desc->cmd_sts = cmd_sts;
/* ensure all descriptors are written before poking hardware */
wmb();
mv643xx_eth_port_enable_tx(mp->port_num, ETH_TX_QUEUES_ENABLED);
mp->tx_desc_count += nr_frags + 1;
}
/**
* mv643xx_eth_start_xmit - queue an skb to the hardware for transmission
*
*/
static int mv643xx_eth_start_xmit(struct sk_buff *skb, struct net_device *dev)
{
struct mv643xx_private *mp = netdev_priv(dev);
struct net_device_stats *stats = &mp->stats;
unsigned long flags;
BUG_ON(netif_queue_stopped(dev));
BUG_ON(skb == NULL);
if (mp->tx_ring_size - mp->tx_desc_count < MAX_DESCS_PER_SKB) {
printk(KERN_ERR "%s: transmit with queue full\n", dev->name);
netif_stop_queue(dev);
return 1;
}
if (has_tiny_unaligned_frags(skb)) {
if (__skb_linearize(skb)) {
stats->tx_dropped++;
printk(KERN_DEBUG "%s: failed to linearize tiny "
"unaligned fragment\n", dev->name);
return 1;
}
}
spin_lock_irqsave(&mp->lock, flags);
eth_tx_submit_descs_for_skb(mp, skb);
stats->tx_bytes = skb->len;
stats->tx_packets++;
dev->trans_start = jiffies;
if (mp->tx_ring_size - mp->tx_desc_count < MAX_DESCS_PER_SKB)
netif_stop_queue(dev);
spin_unlock_irqrestore(&mp->lock, flags);
return 0; /* success */
}
/*
* mv643xx_eth_get_stats
*
* Returns a pointer to the interface statistics.
*
* Input : dev - a pointer to the required interface
*
* Output : a pointer to the interface's statistics
*/
static struct net_device_stats *mv643xx_eth_get_stats(struct net_device *dev)
{
struct mv643xx_private *mp = netdev_priv(dev);
return &mp->stats;
}
#ifdef CONFIG_NET_POLL_CONTROLLER
static void mv643xx_netpoll(struct net_device *netdev)
{
struct mv643xx_private *mp = netdev_priv(netdev);
int port_num = mp->port_num;
mv_write(MV643XX_ETH_INTERRUPT_MASK_REG(port_num), ETH_INT_MASK_ALL);
/* wait for previous write to complete */
mv_read(MV643XX_ETH_INTERRUPT_MASK_REG(port_num));
mv643xx_eth_int_handler(netdev->irq, netdev, NULL);
mv_write(MV643XX_ETH_INTERRUPT_MASK_REG(port_num), ETH_INT_UNMASK_ALL);
}
#endif
static void mv643xx_init_ethtool_cmd(struct net_device *dev, int phy_address,
int speed, int duplex,
struct ethtool_cmd *cmd)
{
struct mv643xx_private *mp = netdev_priv(dev);
memset(cmd, 0, sizeof(*cmd));
cmd->port = PORT_MII;
cmd->transceiver = XCVR_INTERNAL;
cmd->phy_address = phy_address;
if (speed == 0) {
cmd->autoneg = AUTONEG_ENABLE;
/* mii lib checks, but doesn't use speed on AUTONEG_ENABLE */
cmd->speed = SPEED_100;
cmd->advertising = ADVERTISED_10baseT_Half |
ADVERTISED_10baseT_Full |
ADVERTISED_100baseT_Half |
ADVERTISED_100baseT_Full;
if (mp->mii.supports_gmii)
cmd->advertising |= ADVERTISED_1000baseT_Full;
} else {
cmd->autoneg = AUTONEG_DISABLE;
cmd->speed = speed;
cmd->duplex = duplex;
}
}
/*/
* mv643xx_eth_probe
*
* First function called after registering the network device.
* It's purpose is to initialize the device as an ethernet device,
* fill the ethernet device structure with pointers * to functions,
* and set the MAC address of the interface
*
* Input : struct device *
* Output : -ENOMEM if failed , 0 if success
*/
static int mv643xx_eth_probe(struct platform_device *pdev)
{
struct mv643xx_eth_platform_data *pd;
int port_num = pdev->id;
struct mv643xx_private *mp;
struct net_device *dev;
u8 *p;
struct resource *res;
int err;
struct ethtool_cmd cmd;
int duplex = DUPLEX_HALF;
int speed = 0; /* default to auto-negotiation */
dev = alloc_etherdev(sizeof(struct mv643xx_private));
if (!dev)
return -ENOMEM;
platform_set_drvdata(pdev, dev);
mp = netdev_priv(dev);
res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
BUG_ON(!res);
dev->irq = res->start;
mp->port_num = port_num;
dev->open = mv643xx_eth_open;
dev->stop = mv643xx_eth_stop;
dev->hard_start_xmit = mv643xx_eth_start_xmit;
dev->get_stats = mv643xx_eth_get_stats;
dev->set_mac_address = mv643xx_eth_set_mac_address;
dev->set_multicast_list = mv643xx_eth_set_rx_mode;
/* No need to Tx Timeout */
dev->tx_timeout = mv643xx_eth_tx_timeout;
#ifdef MV643XX_NAPI
dev->poll = mv643xx_poll;
dev->weight = 64;
#endif
#ifdef CONFIG_NET_POLL_CONTROLLER
dev->poll_controller = mv643xx_netpoll;
#endif
dev->watchdog_timeo = 2 * HZ;
dev->tx_queue_len = mp->tx_ring_size;
dev->base_addr = 0;
dev->change_mtu = mv643xx_eth_change_mtu;
dev->do_ioctl = mv643xx_eth_do_ioctl;
SET_ETHTOOL_OPS(dev, &mv643xx_ethtool_ops);
#ifdef MV643XX_CHECKSUM_OFFLOAD_TX
#ifdef MAX_SKB_FRAGS
/*
* Zero copy can only work if we use Discovery II memory. Else, we will
* have to map the buffers to ISA memory which is only 16 MB
*/
dev->features = NETIF_F_SG | NETIF_F_IP_CSUM;
#endif
#endif
/* Configure the timeout task */
INIT_WORK(&mp->tx_timeout_task,
(void (*)(void *))mv643xx_eth_tx_timeout_task, dev);
spin_lock_init(&mp->lock);
/* set default config values */
eth_port_uc_addr_get(dev, dev->dev_addr);
mp->rx_ring_size = MV643XX_ETH_PORT_DEFAULT_RECEIVE_QUEUE_SIZE;
mp->tx_ring_size = MV643XX_ETH_PORT_DEFAULT_TRANSMIT_QUEUE_SIZE;
pd = pdev->dev.platform_data;
if (pd) {
if (pd->mac_addr)
memcpy(dev->dev_addr, pd->mac_addr, 6);
if (pd->phy_addr || pd->force_phy_addr)
ethernet_phy_set(port_num, pd->phy_addr);
if (pd->rx_queue_size)
mp->rx_ring_size = pd->rx_queue_size;
if (pd->tx_queue_size)
mp->tx_ring_size = pd->tx_queue_size;
if (pd->tx_sram_size) {
mp->tx_sram_size = pd->tx_sram_size;
mp->tx_sram_addr = pd->tx_sram_addr;
}
if (pd->rx_sram_size) {
mp->rx_sram_size = pd->rx_sram_size;
mp->rx_sram_addr = pd->rx_sram_addr;
}
duplex = pd->duplex;
speed = pd->speed;
}
/* Hook up MII support for ethtool */
mp->mii.dev = dev;
mp->mii.mdio_read = mv643xx_mdio_read;
mp->mii.mdio_write = mv643xx_mdio_write;
mp->mii.phy_id = ethernet_phy_get(port_num);
mp->mii.phy_id_mask = 0x3f;
mp->mii.reg_num_mask = 0x1f;
err = ethernet_phy_detect(port_num);
if (err) {
pr_debug("MV643xx ethernet port %d: "
"No PHY detected at addr %d\n",
port_num, ethernet_phy_get(port_num));
goto out;
}
ethernet_phy_reset(port_num);
mp->mii.supports_gmii = mii_check_gmii_support(&mp->mii);
mv643xx_init_ethtool_cmd(dev, mp->mii.phy_id, speed, duplex, &cmd);
mv643xx_eth_update_pscr(dev, &cmd);
mv643xx_set_settings(dev, &cmd);
SET_MODULE_OWNER(dev);
SET_NETDEV_DEV(dev, &pdev->dev);
err = register_netdev(dev);
if (err)
goto out;
p = dev->dev_addr;
printk(KERN_NOTICE
"%s: port %d with MAC address %02x:%02x:%02x:%02x:%02x:%02x\n",
dev->name, port_num, p[0], p[1], p[2], p[3], p[4], p[5]);
if (dev->features & NETIF_F_SG)
printk(KERN_NOTICE "%s: Scatter Gather Enabled\n", dev->name);
if (dev->features & NETIF_F_IP_CSUM)
printk(KERN_NOTICE "%s: TX TCP/IP Checksumming Supported\n",
dev->name);
#ifdef MV643XX_CHECKSUM_OFFLOAD_TX
printk(KERN_NOTICE "%s: RX TCP/UDP Checksum Offload ON \n", dev->name);
#endif
#ifdef MV643XX_COAL
printk(KERN_NOTICE "%s: TX and RX Interrupt Coalescing ON \n",
dev->name);
#endif
#ifdef MV643XX_NAPI
printk(KERN_NOTICE "%s: RX NAPI Enabled \n", dev->name);
#endif
if (mp->tx_sram_size > 0)
printk(KERN_NOTICE "%s: Using SRAM\n", dev->name);
return 0;
out:
free_netdev(dev);
return err;
}
static int mv643xx_eth_remove(struct platform_device *pdev)
{
struct net_device *dev = platform_get_drvdata(pdev);
unregister_netdev(dev);
flush_scheduled_work();
free_netdev(dev);
platform_set_drvdata(pdev, NULL);
return 0;
}
static int mv643xx_eth_shared_probe(struct platform_device *pdev)
{
struct resource *res;
printk(KERN_NOTICE "MV-643xx 10/100/1000 Ethernet Driver\n");
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (res == NULL)
return -ENODEV;
mv643xx_eth_shared_base = ioremap(res->start,
MV643XX_ETH_SHARED_REGS_SIZE);
if (mv643xx_eth_shared_base == NULL)
return -ENOMEM;
return 0;
}
static int mv643xx_eth_shared_remove(struct platform_device *pdev)
{
iounmap(mv643xx_eth_shared_base);
mv643xx_eth_shared_base = NULL;
return 0;
}
static struct platform_driver mv643xx_eth_driver = {
.probe = mv643xx_eth_probe,
.remove = mv643xx_eth_remove,
.driver = {
.name = MV643XX_ETH_NAME,
},
};
static struct platform_driver mv643xx_eth_shared_driver = {
.probe = mv643xx_eth_shared_probe,
.remove = mv643xx_eth_shared_remove,
.driver = {
.name = MV643XX_ETH_SHARED_NAME,
},
};
/*
* mv643xx_init_module
*
* Registers the network drivers into the Linux kernel
*
* Input : N/A
*
* Output : N/A
*/
static int __init mv643xx_init_module(void)
{
int rc;
rc = platform_driver_register(&mv643xx_eth_shared_driver);
if (!rc) {
rc = platform_driver_register(&mv643xx_eth_driver);
if (rc)
platform_driver_unregister(&mv643xx_eth_shared_driver);
}
return rc;
}
/*
* mv643xx_cleanup_module
*
* Registers the network drivers into the Linux kernel
*
* Input : N/A
*
* Output : N/A
*/
static void __exit mv643xx_cleanup_module(void)
{
platform_driver_unregister(&mv643xx_eth_driver);
platform_driver_unregister(&mv643xx_eth_shared_driver);
}
module_init(mv643xx_init_module);
module_exit(mv643xx_cleanup_module);
MODULE_LICENSE("GPL");
MODULE_AUTHOR( "Rabeeh Khoury, Assaf Hoffman, Matthew Dharm, Manish Lachwani"
" and Dale Farnsworth");
MODULE_DESCRIPTION("Ethernet driver for Marvell MV643XX");
/*
* The second part is the low level driver of the gigE ethernet ports.
*/
/*
* Marvell's Gigabit Ethernet controller low level driver
*
* DESCRIPTION:
* This file introduce low level API to Marvell's Gigabit Ethernet
* controller. This Gigabit Ethernet Controller driver API controls
* 1) Operations (i.e. port init, start, reset etc').
* 2) Data flow (i.e. port send, receive etc').
* Each Gigabit Ethernet port is controlled via
* struct mv643xx_private.
* This struct includes user configuration information as well as
* driver internal data needed for its operations.
*
* Supported Features:
* - This low level driver is OS independent. Allocating memory for
* the descriptor rings and buffers are not within the scope of
* this driver.
* - The user is free from Rx/Tx queue managing.
* - This low level driver introduce functionality API that enable
* the to operate Marvell's Gigabit Ethernet Controller in a
* convenient way.
* - Simple Gigabit Ethernet port operation API.
* - Simple Gigabit Ethernet port data flow API.
* - Data flow and operation API support per queue functionality.
* - Support cached descriptors for better performance.
* - Enable access to all four DRAM banks and internal SRAM memory
* spaces.
* - PHY access and control API.
* - Port control register configuration API.
* - Full control over Unicast and Multicast MAC configurations.
*
* Operation flow:
*
* Initialization phase
* This phase complete the initialization of the the
* mv643xx_private struct.
* User information regarding port configuration has to be set
* prior to calling the port initialization routine.
*
* In this phase any port Tx/Rx activity is halted, MIB counters
* are cleared, PHY address is set according to user parameter and
* access to DRAM and internal SRAM memory spaces.
*
* Driver ring initialization
* Allocating memory for the descriptor rings and buffers is not
* within the scope of this driver. Thus, the user is required to
* allocate memory for the descriptors ring and buffers. Those
* memory parameters are used by the Rx and Tx ring initialization
* routines in order to curve the descriptor linked list in a form
* of a ring.
* Note: Pay special attention to alignment issues when using
* cached descriptors/buffers. In this phase the driver store
* information in the mv643xx_private struct regarding each queue
* ring.
*
* Driver start
* This phase prepares the Ethernet port for Rx and Tx activity.
* It uses the information stored in the mv643xx_private struct to
* initialize the various port registers.
*
* Data flow:
* All packet references to/from the driver are done using
* struct pkt_info.
* This struct is a unified struct used with Rx and Tx operations.
* This way the user is not required to be familiar with neither
* Tx nor Rx descriptors structures.
* The driver's descriptors rings are management by indexes.
* Those indexes controls the ring resources and used to indicate
* a SW resource error:
* 'current'
* This index points to the current available resource for use. For
* example in Rx process this index will point to the descriptor
* that will be passed to the user upon calling the receive
* routine. In Tx process, this index will point to the descriptor
* that will be assigned with the user packet info and transmitted.
* 'used'
* This index points to the descriptor that need to restore its
* resources. For example in Rx process, using the Rx buffer return
* API will attach the buffer returned in packet info to the
* descriptor pointed by 'used'. In Tx process, using the Tx
* descriptor return will merely return the user packet info with
* the command status of the transmitted buffer pointed by the
* 'used' index. Nevertheless, it is essential to use this routine
* to update the 'used' index.
* 'first'
* This index supports Tx Scatter-Gather. It points to the first
* descriptor of a packet assembled of multiple buffers. For
* example when in middle of Such packet we have a Tx resource
* error the 'curr' index get the value of 'first' to indicate
* that the ring returned to its state before trying to transmit
* this packet.
*
* Receive operation:
* The eth_port_receive API set the packet information struct,
* passed by the caller, with received information from the
* 'current' SDMA descriptor.
* It is the user responsibility to return this resource back
* to the Rx descriptor ring to enable the reuse of this source.
* Return Rx resource is done using the eth_rx_return_buff API.
*
* Prior to calling the initialization routine eth_port_init() the user
* must set the following fields under mv643xx_private struct:
* port_num User Ethernet port number.
* port_config User port configuration value.
* port_config_extend User port config extend value.
* port_sdma_config User port SDMA config value.
* port_serial_control User port serial control value.
*
* This driver data flow is done using the struct pkt_info which
* is a unified struct for Rx and Tx operations:
*
* byte_cnt Tx/Rx descriptor buffer byte count.
* l4i_chk CPU provided TCP Checksum. For Tx operation
* only.
* cmd_sts Tx/Rx descriptor command status.
* buf_ptr Tx/Rx descriptor buffer pointer.
* return_info Tx/Rx user resource return information.
*/
/* PHY routines */
static int ethernet_phy_get(unsigned int eth_port_num);
static void ethernet_phy_set(unsigned int eth_port_num, int phy_addr);
/* Ethernet Port routines */
static void eth_port_set_filter_table_entry(int table, unsigned char entry);
/*
* eth_port_init - Initialize the Ethernet port driver
*
* DESCRIPTION:
* This function prepares the ethernet port to start its activity:
* 1) Completes the ethernet port driver struct initialization toward port
* start routine.
* 2) Resets the device to a quiescent state in case of warm reboot.
* 3) Enable SDMA access to all four DRAM banks as well as internal SRAM.
* 4) Clean MAC tables. The reset status of those tables is unknown.
* 5) Set PHY address.
* Note: Call this routine prior to eth_port_start routine and after
* setting user values in the user fields of Ethernet port control
* struct.
*
* INPUT:
* struct mv643xx_private *mp Ethernet port control struct
*
* OUTPUT:
* See description.
*
* RETURN:
* None.
*/
static void eth_port_init(struct mv643xx_private *mp)
{
mp->rx_resource_err = 0;
eth_port_reset(mp->port_num);
eth_port_init_mac_tables(mp->port_num);
}
/*
* eth_port_start - Start the Ethernet port activity.
*
* DESCRIPTION:
* This routine prepares the Ethernet port for Rx and Tx activity:
* 1. Initialize Tx and Rx Current Descriptor Pointer for each queue that
* has been initialized a descriptor's ring (using
* ether_init_tx_desc_ring for Tx and ether_init_rx_desc_ring for Rx)
* 2. Initialize and enable the Ethernet configuration port by writing to
* the port's configuration and command registers.
* 3. Initialize and enable the SDMA by writing to the SDMA's
* configuration and command registers. After completing these steps,
* the ethernet port SDMA can starts to perform Rx and Tx activities.
*
* Note: Each Rx and Tx queue descriptor's list must be initialized prior
* to calling this function (use ether_init_tx_desc_ring for Tx queues
* and ether_init_rx_desc_ring for Rx queues).
*
* INPUT:
* dev - a pointer to the required interface
*
* OUTPUT:
* Ethernet port is ready to receive and transmit.
*
* RETURN:
* None.
*/
static void eth_port_start(struct net_device *dev)
{
struct mv643xx_private *mp = netdev_priv(dev);
unsigned int port_num = mp->port_num;
int tx_curr_desc, rx_curr_desc;
u32 pscr;
struct ethtool_cmd ethtool_cmd;
/* Assignment of Tx CTRP of given queue */
tx_curr_desc = mp->tx_curr_desc_q;
mv_write(MV643XX_ETH_TX_CURRENT_QUEUE_DESC_PTR_0(port_num),
(u32)((struct eth_tx_desc *)mp->tx_desc_dma + tx_curr_desc));
/* Assignment of Rx CRDP of given queue */
rx_curr_desc = mp->rx_curr_desc_q;
mv_write(MV643XX_ETH_RX_CURRENT_QUEUE_DESC_PTR_0(port_num),
(u32)((struct eth_rx_desc *)mp->rx_desc_dma + rx_curr_desc));
/* Add the assigned Ethernet address to the port's address table */
eth_port_uc_addr_set(port_num, dev->dev_addr);
/* Assign port configuration and command. */
mv_write(MV643XX_ETH_PORT_CONFIG_REG(port_num),
MV643XX_ETH_PORT_CONFIG_DEFAULT_VALUE);
mv_write(MV643XX_ETH_PORT_CONFIG_EXTEND_REG(port_num),
MV643XX_ETH_PORT_CONFIG_EXTEND_DEFAULT_VALUE);
pscr = mv_read(MV643XX_ETH_PORT_SERIAL_CONTROL_REG(port_num));
pscr &= ~(MV643XX_ETH_SERIAL_PORT_ENABLE | MV643XX_ETH_FORCE_LINK_PASS);
mv_write(MV643XX_ETH_PORT_SERIAL_CONTROL_REG(port_num), pscr);
pscr |= MV643XX_ETH_DISABLE_AUTO_NEG_FOR_FLOW_CTRL |
MV643XX_ETH_DISABLE_AUTO_NEG_SPEED_GMII |
MV643XX_ETH_DISABLE_AUTO_NEG_FOR_DUPLX |
MV643XX_ETH_DO_NOT_FORCE_LINK_FAIL |
MV643XX_ETH_SERIAL_PORT_CONTROL_RESERVED;
mv_write(MV643XX_ETH_PORT_SERIAL_CONTROL_REG(port_num), pscr);
pscr |= MV643XX_ETH_SERIAL_PORT_ENABLE;
mv_write(MV643XX_ETH_PORT_SERIAL_CONTROL_REG(port_num), pscr);
/* Assign port SDMA configuration */
mv_write(MV643XX_ETH_SDMA_CONFIG_REG(port_num),
MV643XX_ETH_PORT_SDMA_CONFIG_DEFAULT_VALUE);
/* Enable port Rx. */
mv643xx_eth_port_enable_rx(port_num, ETH_RX_QUEUES_ENABLED);
/* Disable port bandwidth limits by clearing MTU register */
mv_write(MV643XX_ETH_MAXIMUM_TRANSMIT_UNIT(port_num), 0);
/* save phy settings across reset */
mv643xx_get_settings(dev, &ethtool_cmd);
ethernet_phy_reset(mp->port_num);
mv643xx_set_settings(dev, &ethtool_cmd);
}
/*
* eth_port_uc_addr_set - This function Set the port Unicast address.
*
* DESCRIPTION:
* This function Set the port Ethernet MAC address.
*
* INPUT:
* unsigned int eth_port_num Port number.
* char * p_addr Address to be set
*
* OUTPUT:
* Set MAC address low and high registers. also calls
* eth_port_set_filter_table_entry() to set the unicast
* table with the proper information.
*
* RETURN:
* N/A.
*
*/
static void eth_port_uc_addr_set(unsigned int eth_port_num,
unsigned char *p_addr)
{
unsigned int mac_h;
unsigned int mac_l;
int table;
mac_l = (p_addr[4] << 8) | (p_addr[5]);
mac_h = (p_addr[0] << 24) | (p_addr[1] << 16) | (p_addr[2] << 8) |
(p_addr[3] << 0);
mv_write(MV643XX_ETH_MAC_ADDR_LOW(eth_port_num), mac_l);
mv_write(MV643XX_ETH_MAC_ADDR_HIGH(eth_port_num), mac_h);
/* Accept frames of this address */
table = MV643XX_ETH_DA_FILTER_UNICAST_TABLE_BASE(eth_port_num);
eth_port_set_filter_table_entry(table, p_addr[5] & 0x0f);
}
/*
* eth_port_uc_addr_get - This function retrieves the port Unicast address
* (MAC address) from the ethernet hw registers.
*
* DESCRIPTION:
* This function retrieves the port Ethernet MAC address.
*
* INPUT:
* unsigned int eth_port_num Port number.
* char *MacAddr pointer where the MAC address is stored
*
* OUTPUT:
* Copy the MAC address to the location pointed to by MacAddr
*
* RETURN:
* N/A.
*
*/
static void eth_port_uc_addr_get(struct net_device *dev, unsigned char *p_addr)
{
struct mv643xx_private *mp = netdev_priv(dev);
unsigned int mac_h;
unsigned int mac_l;
mac_h = mv_read(MV643XX_ETH_MAC_ADDR_HIGH(mp->port_num));
mac_l = mv_read(MV643XX_ETH_MAC_ADDR_LOW(mp->port_num));
p_addr[0] = (mac_h >> 24) & 0xff;
p_addr[1] = (mac_h >> 16) & 0xff;
p_addr[2] = (mac_h >> 8) & 0xff;
p_addr[3] = mac_h & 0xff;
p_addr[4] = (mac_l >> 8) & 0xff;
p_addr[5] = mac_l & 0xff;
}
/*
* The entries in each table are indexed by a hash of a packet's MAC
* address. One bit in each entry determines whether the packet is
* accepted. There are 4 entries (each 8 bits wide) in each register
* of the table. The bits in each entry are defined as follows:
* 0 Accept=1, Drop=0
* 3-1 Queue (ETH_Q0=0)
* 7-4 Reserved = 0;
*/
static void eth_port_set_filter_table_entry(int table, unsigned char entry)
{
unsigned int table_reg;
unsigned int tbl_offset;
unsigned int reg_offset;
tbl_offset = (entry / 4) * 4; /* Register offset of DA table entry */
reg_offset = entry % 4; /* Entry offset within the register */
/* Set "accepts frame bit" at specified table entry */
table_reg = mv_read(table + tbl_offset);
table_reg |= 0x01 << (8 * reg_offset);
mv_write(table + tbl_offset, table_reg);
}
/*
* eth_port_mc_addr - Multicast address settings.
*
* The MV device supports multicast using two tables:
* 1) Special Multicast Table for MAC addresses of the form
* 0x01-00-5E-00-00-XX (where XX is between 0x00 and 0x_FF).
* The MAC DA[7:0] bits are used as a pointer to the Special Multicast
* Table entries in the DA-Filter table.
* 2) Other Multicast Table for multicast of another type. A CRC-8bit
* is used as an index to the Other Multicast Table entries in the
* DA-Filter table. This function calculates the CRC-8bit value.
* In either case, eth_port_set_filter_table_entry() is then called
* to set to set the actual table entry.
*/
static void eth_port_mc_addr(unsigned int eth_port_num, unsigned char *p_addr)
{
unsigned int mac_h;
unsigned int mac_l;
unsigned char crc_result = 0;
int table;
int mac_array[48];
int crc[8];
int i;
if ((p_addr[0] == 0x01) && (p_addr[1] == 0x00) &&
(p_addr[2] == 0x5E) && (p_addr[3] == 0x00) && (p_addr[4] == 0x00)) {
table = MV643XX_ETH_DA_FILTER_SPECIAL_MULTICAST_TABLE_BASE
(eth_port_num);
eth_port_set_filter_table_entry(table, p_addr[5]);
return;
}
/* Calculate CRC-8 out of the given address */
mac_h = (p_addr[0] << 8) | (p_addr[1]);
mac_l = (p_addr[2] << 24) | (p_addr[3] << 16) |
(p_addr[4] << 8) | (p_addr[5] << 0);
for (i = 0; i < 32; i++)
mac_array[i] = (mac_l >> i) & 0x1;
for (i = 32; i < 48; i++)
mac_array[i] = (mac_h >> (i - 32)) & 0x1;
crc[0] = mac_array[45] ^ mac_array[43] ^ mac_array[40] ^ mac_array[39] ^
mac_array[35] ^ mac_array[34] ^ mac_array[31] ^ mac_array[30] ^
mac_array[28] ^ mac_array[23] ^ mac_array[21] ^ mac_array[19] ^
mac_array[18] ^ mac_array[16] ^ mac_array[14] ^ mac_array[12] ^
mac_array[8] ^ mac_array[7] ^ mac_array[6] ^ mac_array[0];
crc[1] = mac_array[46] ^ mac_array[45] ^ mac_array[44] ^ mac_array[43] ^
mac_array[41] ^ mac_array[39] ^ mac_array[36] ^ mac_array[34] ^
mac_array[32] ^ mac_array[30] ^ mac_array[29] ^ mac_array[28] ^
mac_array[24] ^ mac_array[23] ^ mac_array[22] ^ mac_array[21] ^
mac_array[20] ^ mac_array[18] ^ mac_array[17] ^ mac_array[16] ^
mac_array[15] ^ mac_array[14] ^ mac_array[13] ^ mac_array[12] ^
mac_array[9] ^ mac_array[6] ^ mac_array[1] ^ mac_array[0];
crc[2] = mac_array[47] ^ mac_array[46] ^ mac_array[44] ^ mac_array[43] ^
mac_array[42] ^ mac_array[39] ^ mac_array[37] ^ mac_array[34] ^
mac_array[33] ^ mac_array[29] ^ mac_array[28] ^ mac_array[25] ^
mac_array[24] ^ mac_array[22] ^ mac_array[17] ^ mac_array[15] ^
mac_array[13] ^ mac_array[12] ^ mac_array[10] ^ mac_array[8] ^
mac_array[6] ^ mac_array[2] ^ mac_array[1] ^ mac_array[0];
crc[3] = mac_array[47] ^ mac_array[45] ^ mac_array[44] ^ mac_array[43] ^
mac_array[40] ^ mac_array[38] ^ mac_array[35] ^ mac_array[34] ^
mac_array[30] ^ mac_array[29] ^ mac_array[26] ^ mac_array[25] ^
mac_array[23] ^ mac_array[18] ^ mac_array[16] ^ mac_array[14] ^
mac_array[13] ^ mac_array[11] ^ mac_array[9] ^ mac_array[7] ^
mac_array[3] ^ mac_array[2] ^ mac_array[1];
crc[4] = mac_array[46] ^ mac_array[45] ^ mac_array[44] ^ mac_array[41] ^
mac_array[39] ^ mac_array[36] ^ mac_array[35] ^ mac_array[31] ^
mac_array[30] ^ mac_array[27] ^ mac_array[26] ^ mac_array[24] ^
mac_array[19] ^ mac_array[17] ^ mac_array[15] ^ mac_array[14] ^
mac_array[12] ^ mac_array[10] ^ mac_array[8] ^ mac_array[4] ^
mac_array[3] ^ mac_array[2];
crc[5] = mac_array[47] ^ mac_array[46] ^ mac_array[45] ^ mac_array[42] ^
mac_array[40] ^ mac_array[37] ^ mac_array[36] ^ mac_array[32] ^
mac_array[31] ^ mac_array[28] ^ mac_array[27] ^ mac_array[25] ^
mac_array[20] ^ mac_array[18] ^ mac_array[16] ^ mac_array[15] ^
mac_array[13] ^ mac_array[11] ^ mac_array[9] ^ mac_array[5] ^
mac_array[4] ^ mac_array[3];
crc[6] = mac_array[47] ^ mac_array[46] ^ mac_array[43] ^ mac_array[41] ^
mac_array[38] ^ mac_array[37] ^ mac_array[33] ^ mac_array[32] ^
mac_array[29] ^ mac_array[28] ^ mac_array[26] ^ mac_array[21] ^
mac_array[19] ^ mac_array[17] ^ mac_array[16] ^ mac_array[14] ^
mac_array[12] ^ mac_array[10] ^ mac_array[6] ^ mac_array[5] ^
mac_array[4];
crc[7] = mac_array[47] ^ mac_array[44] ^ mac_array[42] ^ mac_array[39] ^
mac_array[38] ^ mac_array[34] ^ mac_array[33] ^ mac_array[30] ^
mac_array[29] ^ mac_array[27] ^ mac_array[22] ^ mac_array[20] ^
mac_array[18] ^ mac_array[17] ^ mac_array[15] ^ mac_array[13] ^
mac_array[11] ^ mac_array[7] ^ mac_array[6] ^ mac_array[5];
for (i = 0; i < 8; i++)
crc_result = crc_result | (crc[i] << i);
table = MV643XX_ETH_DA_FILTER_OTHER_MULTICAST_TABLE_BASE(eth_port_num);
eth_port_set_filter_table_entry(table, crc_result);
}
/*
* Set the entire multicast list based on dev->mc_list.
*/
static void eth_port_set_multicast_list(struct net_device *dev)
{
struct dev_mc_list *mc_list;
int i;
int table_index;
struct mv643xx_private *mp = netdev_priv(dev);
unsigned int eth_port_num = mp->port_num;
/* If the device is in promiscuous mode or in all multicast mode,
* we will fully populate both multicast tables with accept.
* This is guaranteed to yield a match on all multicast addresses...
*/
if ((dev->flags & IFF_PROMISC) || (dev->flags & IFF_ALLMULTI)) {
for (table_index = 0; table_index <= 0xFC; table_index += 4) {
/* Set all entries in DA filter special multicast
* table (Ex_dFSMT)
* Set for ETH_Q0 for now
* Bits
* 0 Accept=1, Drop=0
* 3-1 Queue ETH_Q0=0
* 7-4 Reserved = 0;
*/
mv_write(MV643XX_ETH_DA_FILTER_SPECIAL_MULTICAST_TABLE_BASE(eth_port_num) + table_index, 0x01010101);
/* Set all entries in DA filter other multicast
* table (Ex_dFOMT)
* Set for ETH_Q0 for now
* Bits
* 0 Accept=1, Drop=0
* 3-1 Queue ETH_Q0=0
* 7-4 Reserved = 0;
*/
mv_write(MV643XX_ETH_DA_FILTER_OTHER_MULTICAST_TABLE_BASE(eth_port_num) + table_index, 0x01010101);
}
return;
}
/* We will clear out multicast tables every time we get the list.
* Then add the entire new list...
*/
for (table_index = 0; table_index <= 0xFC; table_index += 4) {
/* Clear DA filter special multicast table (Ex_dFSMT) */
mv_write(MV643XX_ETH_DA_FILTER_SPECIAL_MULTICAST_TABLE_BASE
(eth_port_num) + table_index, 0);
/* Clear DA filter other multicast table (Ex_dFOMT) */
mv_write(MV643XX_ETH_DA_FILTER_OTHER_MULTICAST_TABLE_BASE
(eth_port_num) + table_index, 0);
}
/* Get pointer to net_device multicast list and add each one... */
for (i = 0, mc_list = dev->mc_list;
(i < 256) && (mc_list != NULL) && (i < dev->mc_count);
i++, mc_list = mc_list->next)
if (mc_list->dmi_addrlen == 6)
eth_port_mc_addr(eth_port_num, mc_list->dmi_addr);
}
/*
* eth_port_init_mac_tables - Clear all entrance in the UC, SMC and OMC tables
*
* DESCRIPTION:
* Go through all the DA filter tables (Unicast, Special Multicast &
* Other Multicast) and set each entry to 0.
*
* INPUT:
* unsigned int eth_port_num Ethernet Port number.
*
* OUTPUT:
* Multicast and Unicast packets are rejected.
*
* RETURN:
* None.
*/
static void eth_port_init_mac_tables(unsigned int eth_port_num)
{
int table_index;
/* Clear DA filter unicast table (Ex_dFUT) */
for (table_index = 0; table_index <= 0xC; table_index += 4)
mv_write(MV643XX_ETH_DA_FILTER_UNICAST_TABLE_BASE
(eth_port_num) + table_index, 0);
for (table_index = 0; table_index <= 0xFC; table_index += 4) {
/* Clear DA filter special multicast table (Ex_dFSMT) */
mv_write(MV643XX_ETH_DA_FILTER_SPECIAL_MULTICAST_TABLE_BASE
(eth_port_num) + table_index, 0);
/* Clear DA filter other multicast table (Ex_dFOMT) */
mv_write(MV643XX_ETH_DA_FILTER_OTHER_MULTICAST_TABLE_BASE
(eth_port_num) + table_index, 0);
}
}
/*
* eth_clear_mib_counters - Clear all MIB counters
*
* DESCRIPTION:
* This function clears all MIB counters of a specific ethernet port.
* A read from the MIB counter will reset the counter.
*
* INPUT:
* unsigned int eth_port_num Ethernet Port number.
*
* OUTPUT:
* After reading all MIB counters, the counters resets.
*
* RETURN:
* MIB counter value.
*
*/
static void eth_clear_mib_counters(unsigned int eth_port_num)
{
int i;
/* Perform dummy reads from MIB counters */
for (i = ETH_MIB_GOOD_OCTETS_RECEIVED_LOW; i < ETH_MIB_LATE_COLLISION;
i += 4)
mv_read(MV643XX_ETH_MIB_COUNTERS_BASE(eth_port_num) + i);
}
static inline u32 read_mib(struct mv643xx_private *mp, int offset)
{
return mv_read(MV643XX_ETH_MIB_COUNTERS_BASE(mp->port_num) + offset);
}
static void eth_update_mib_counters(struct mv643xx_private *mp)
{
struct mv643xx_mib_counters *p = &mp->mib_counters;
int offset;
p->good_octets_received +=
read_mib(mp, ETH_MIB_GOOD_OCTETS_RECEIVED_LOW);
p->good_octets_received +=
(u64)read_mib(mp, ETH_MIB_GOOD_OCTETS_RECEIVED_HIGH) << 32;
for (offset = ETH_MIB_BAD_OCTETS_RECEIVED;
offset <= ETH_MIB_FRAMES_1024_TO_MAX_OCTETS;
offset += 4)
*(u32 *)((char *)p + offset) = read_mib(mp, offset);
p->good_octets_sent += read_mib(mp, ETH_MIB_GOOD_OCTETS_SENT_LOW);
p->good_octets_sent +=
(u64)read_mib(mp, ETH_MIB_GOOD_OCTETS_SENT_HIGH) << 32;
for (offset = ETH_MIB_GOOD_FRAMES_SENT;
offset <= ETH_MIB_LATE_COLLISION;
offset += 4)
*(u32 *)((char *)p + offset) = read_mib(mp, offset);
}
/*
* ethernet_phy_detect - Detect whether a phy is present
*
* DESCRIPTION:
* This function tests whether there is a PHY present on
* the specified port.
*
* INPUT:
* unsigned int eth_port_num Ethernet Port number.
*
* OUTPUT:
* None
*
* RETURN:
* 0 on success
* -ENODEV on failure
*
*/
static int ethernet_phy_detect(unsigned int port_num)
{
unsigned int phy_reg_data0;
int auto_neg;
eth_port_read_smi_reg(port_num, 0, &phy_reg_data0);
auto_neg = phy_reg_data0 & 0x1000;
phy_reg_data0 ^= 0x1000; /* invert auto_neg */
eth_port_write_smi_reg(port_num, 0, phy_reg_data0);
eth_port_read_smi_reg(port_num, 0, &phy_reg_data0);
if ((phy_reg_data0 & 0x1000) == auto_neg)
return -ENODEV; /* change didn't take */
phy_reg_data0 ^= 0x1000;
eth_port_write_smi_reg(port_num, 0, phy_reg_data0);
return 0;
}
/*
* ethernet_phy_get - Get the ethernet port PHY address.
*
* DESCRIPTION:
* This routine returns the given ethernet port PHY address.
*
* INPUT:
* unsigned int eth_port_num Ethernet Port number.
*
* OUTPUT:
* None.
*
* RETURN:
* PHY address.
*
*/
static int ethernet_phy_get(unsigned int eth_port_num)
{
unsigned int reg_data;
reg_data = mv_read(MV643XX_ETH_PHY_ADDR_REG);
return ((reg_data >> (5 * eth_port_num)) & 0x1f);
}
/*
* ethernet_phy_set - Set the ethernet port PHY address.
*
* DESCRIPTION:
* This routine sets the given ethernet port PHY address.
*
* INPUT:
* unsigned int eth_port_num Ethernet Port number.
* int phy_addr PHY address.
*
* OUTPUT:
* None.
*
* RETURN:
* None.
*
*/
static void ethernet_phy_set(unsigned int eth_port_num, int phy_addr)
{
u32 reg_data;
int addr_shift = 5 * eth_port_num;
reg_data = mv_read(MV643XX_ETH_PHY_ADDR_REG);
reg_data &= ~(0x1f << addr_shift);
reg_data |= (phy_addr & 0x1f) << addr_shift;
mv_write(MV643XX_ETH_PHY_ADDR_REG, reg_data);
}
/*
* ethernet_phy_reset - Reset Ethernet port PHY.
*
* DESCRIPTION:
* This routine utilizes the SMI interface to reset the ethernet port PHY.
*
* INPUT:
* unsigned int eth_port_num Ethernet Port number.
*
* OUTPUT:
* The PHY is reset.
*
* RETURN:
* None.
*
*/
static void ethernet_phy_reset(unsigned int eth_port_num)
{
unsigned int phy_reg_data;
/* Reset the PHY */
eth_port_read_smi_reg(eth_port_num, 0, &phy_reg_data);
phy_reg_data |= 0x8000; /* Set bit 15 to reset the PHY */
eth_port_write_smi_reg(eth_port_num, 0, phy_reg_data);
/* wait for PHY to come out of reset */
do {
udelay(1);
eth_port_read_smi_reg(eth_port_num, 0, &phy_reg_data);
} while (phy_reg_data & 0x8000);
}
static void mv643xx_eth_port_enable_tx(unsigned int port_num,
unsigned int queues)
{
mv_write(MV643XX_ETH_TRANSMIT_QUEUE_COMMAND_REG(port_num), queues);
}
static void mv643xx_eth_port_enable_rx(unsigned int port_num,
unsigned int queues)
{
mv_write(MV643XX_ETH_RECEIVE_QUEUE_COMMAND_REG(port_num), queues);
}
static unsigned int mv643xx_eth_port_disable_tx(unsigned int port_num)
{
u32 queues;
/* Stop Tx port activity. Check port Tx activity. */
queues = mv_read(MV643XX_ETH_TRANSMIT_QUEUE_COMMAND_REG(port_num))
& 0xFF;
if (queues) {
/* Issue stop command for active queues only */
mv_write(MV643XX_ETH_TRANSMIT_QUEUE_COMMAND_REG(port_num),
(queues << 8));
/* Wait for all Tx activity to terminate. */
/* Check port cause register that all Tx queues are stopped */
while (mv_read(MV643XX_ETH_TRANSMIT_QUEUE_COMMAND_REG(port_num))
& 0xFF)
udelay(PHY_WAIT_MICRO_SECONDS);
/* Wait for Tx FIFO to empty */
while (mv_read(MV643XX_ETH_PORT_STATUS_REG(port_num)) &
ETH_PORT_TX_FIFO_EMPTY)
udelay(PHY_WAIT_MICRO_SECONDS);
}
return queues;
}
static unsigned int mv643xx_eth_port_disable_rx(unsigned int port_num)
{
u32 queues;
/* Stop Rx port activity. Check port Rx activity. */
queues = mv_read(MV643XX_ETH_RECEIVE_QUEUE_COMMAND_REG(port_num))
& 0xFF;
if (queues) {
/* Issue stop command for active queues only */
mv_write(MV643XX_ETH_RECEIVE_QUEUE_COMMAND_REG(port_num),
(queues << 8));
/* Wait for all Rx activity to terminate. */
/* Check port cause register that all Rx queues are stopped */
while (mv_read(MV643XX_ETH_RECEIVE_QUEUE_COMMAND_REG(port_num))
& 0xFF)
udelay(PHY_WAIT_MICRO_SECONDS);
}
return queues;
}
/*
* eth_port_reset - Reset Ethernet port
*
* DESCRIPTION:
* This routine resets the chip by aborting any SDMA engine activity and
* clearing the MIB counters. The Receiver and the Transmit unit are in
* idle state after this command is performed and the port is disabled.
*
* INPUT:
* unsigned int eth_port_num Ethernet Port number.
*
* OUTPUT:
* Channel activity is halted.
*
* RETURN:
* None.
*
*/
static void eth_port_reset(unsigned int port_num)
{
unsigned int reg_data;
mv643xx_eth_port_disable_tx(port_num);
mv643xx_eth_port_disable_rx(port_num);
/* Clear all MIB counters */
eth_clear_mib_counters(port_num);
/* Reset the Enable bit in the Configuration Register */
reg_data = mv_read(MV643XX_ETH_PORT_SERIAL_CONTROL_REG(port_num));
reg_data &= ~(MV643XX_ETH_SERIAL_PORT_ENABLE |
MV643XX_ETH_DO_NOT_FORCE_LINK_FAIL |
MV643XX_ETH_FORCE_LINK_PASS);
mv_write(MV643XX_ETH_PORT_SERIAL_CONTROL_REG(port_num), reg_data);
}
/*
* eth_port_read_smi_reg - Read PHY registers
*
* DESCRIPTION:
* This routine utilize the SMI interface to interact with the PHY in
* order to perform PHY register read.
*
* INPUT:
* unsigned int port_num Ethernet Port number.
* unsigned int phy_reg PHY register address offset.
* unsigned int *value Register value buffer.
*
* OUTPUT:
* Write the value of a specified PHY register into given buffer.
*
* RETURN:
* false if the PHY is busy or read data is not in valid state.
* true otherwise.
*
*/
static void eth_port_read_smi_reg(unsigned int port_num,
unsigned int phy_reg, unsigned int *value)
{
int phy_addr = ethernet_phy_get(port_num);
unsigned long flags;
int i;
/* the SMI register is a shared resource */
spin_lock_irqsave(&mv643xx_eth_phy_lock, flags);
/* wait for the SMI register to become available */
for (i = 0; mv_read(MV643XX_ETH_SMI_REG) & ETH_SMI_BUSY; i++) {
if (i == PHY_WAIT_ITERATIONS) {
printk("mv643xx PHY busy timeout, port %d\n", port_num);
goto out;
}
udelay(PHY_WAIT_MICRO_SECONDS);
}
mv_write(MV643XX_ETH_SMI_REG,
(phy_addr << 16) | (phy_reg << 21) | ETH_SMI_OPCODE_READ);
/* now wait for the data to be valid */
for (i = 0; !(mv_read(MV643XX_ETH_SMI_REG) & ETH_SMI_READ_VALID); i++) {
if (i == PHY_WAIT_ITERATIONS) {
printk("mv643xx PHY read timeout, port %d\n", port_num);
goto out;
}
udelay(PHY_WAIT_MICRO_SECONDS);
}
*value = mv_read(MV643XX_ETH_SMI_REG) & 0xffff;
out:
spin_unlock_irqrestore(&mv643xx_eth_phy_lock, flags);
}
/*
* eth_port_write_smi_reg - Write to PHY registers
*
* DESCRIPTION:
* This routine utilize the SMI interface to interact with the PHY in
* order to perform writes to PHY registers.
*
* INPUT:
* unsigned int eth_port_num Ethernet Port number.
* unsigned int phy_reg PHY register address offset.
* unsigned int value Register value.
*
* OUTPUT:
* Write the given value to the specified PHY register.
*
* RETURN:
* false if the PHY is busy.
* true otherwise.
*
*/
static void eth_port_write_smi_reg(unsigned int eth_port_num,
unsigned int phy_reg, unsigned int value)
{
int phy_addr;
int i;
unsigned long flags;
phy_addr = ethernet_phy_get(eth_port_num);
/* the SMI register is a shared resource */
spin_lock_irqsave(&mv643xx_eth_phy_lock, flags);
/* wait for the SMI register to become available */
for (i = 0; mv_read(MV643XX_ETH_SMI_REG) & ETH_SMI_BUSY; i++) {
if (i == PHY_WAIT_ITERATIONS) {
printk("mv643xx PHY busy timeout, port %d\n",
eth_port_num);
goto out;
}
udelay(PHY_WAIT_MICRO_SECONDS);
}
mv_write(MV643XX_ETH_SMI_REG, (phy_addr << 16) | (phy_reg << 21) |
ETH_SMI_OPCODE_WRITE | (value & 0xffff));
out:
spin_unlock_irqrestore(&mv643xx_eth_phy_lock, flags);
}
/*
* Wrappers for MII support library.
*/
static int mv643xx_mdio_read(struct net_device *dev, int phy_id, int location)
{
int val;
struct mv643xx_private *mp = netdev_priv(dev);
eth_port_read_smi_reg(mp->port_num, location, &val);
return val;
}
static void mv643xx_mdio_write(struct net_device *dev, int phy_id, int location, int val)
{
struct mv643xx_private *mp = netdev_priv(dev);
eth_port_write_smi_reg(mp->port_num, location, val);
}
/*
* eth_port_receive - Get received information from Rx ring.
*
* DESCRIPTION:
* This routine returns the received data to the caller. There is no
* data copying during routine operation. All information is returned
* using pointer to packet information struct passed from the caller.
* If the routine exhausts Rx ring resources then the resource error flag
* is set.
*
* INPUT:
* struct mv643xx_private *mp Ethernet Port Control srtuct.
* struct pkt_info *p_pkt_info User packet buffer.
*
* OUTPUT:
* Rx ring current and used indexes are updated.
*
* RETURN:
* ETH_ERROR in case the routine can not access Rx desc ring.
* ETH_QUEUE_FULL if Rx ring resources are exhausted.
* ETH_END_OF_JOB if there is no received data.
* ETH_OK otherwise.
*/
static ETH_FUNC_RET_STATUS eth_port_receive(struct mv643xx_private *mp,
struct pkt_info *p_pkt_info)
{
int rx_next_curr_desc, rx_curr_desc, rx_used_desc;
volatile struct eth_rx_desc *p_rx_desc;
unsigned int command_status;
unsigned long flags;
/* Do not process Rx ring in case of Rx ring resource error */
if (mp->rx_resource_err)
return ETH_QUEUE_FULL;
spin_lock_irqsave(&mp->lock, flags);
/* Get the Rx Desc ring 'curr and 'used' indexes */
rx_curr_desc = mp->rx_curr_desc_q;
rx_used_desc = mp->rx_used_desc_q;
p_rx_desc = &mp->p_rx_desc_area[rx_curr_desc];
/* The following parameters are used to save readings from memory */
command_status = p_rx_desc->cmd_sts;
rmb();
/* Nothing to receive... */
if (command_status & (ETH_BUFFER_OWNED_BY_DMA)) {
spin_unlock_irqrestore(&mp->lock, flags);
return ETH_END_OF_JOB;
}
p_pkt_info->byte_cnt = (p_rx_desc->byte_cnt) - RX_BUF_OFFSET;
p_pkt_info->cmd_sts = command_status;
p_pkt_info->buf_ptr = (p_rx_desc->buf_ptr) + RX_BUF_OFFSET;
p_pkt_info->return_info = mp->rx_skb[rx_curr_desc];
p_pkt_info->l4i_chk = p_rx_desc->buf_size;
/*
* Clean the return info field to indicate that the
* packet has been moved to the upper layers
*/
mp->rx_skb[rx_curr_desc] = NULL;
/* Update current index in data structure */
rx_next_curr_desc = (rx_curr_desc + 1) % mp->rx_ring_size;
mp->rx_curr_desc_q = rx_next_curr_desc;
/* Rx descriptors exhausted. Set the Rx ring resource error flag */
if (rx_next_curr_desc == rx_used_desc)
mp->rx_resource_err = 1;
spin_unlock_irqrestore(&mp->lock, flags);
return ETH_OK;
}
/*
* eth_rx_return_buff - Returns a Rx buffer back to the Rx ring.
*
* DESCRIPTION:
* This routine returns a Rx buffer back to the Rx ring. It retrieves the
* next 'used' descriptor and attached the returned buffer to it.
* In case the Rx ring was in "resource error" condition, where there are
* no available Rx resources, the function resets the resource error flag.
*
* INPUT:
* struct mv643xx_private *mp Ethernet Port Control srtuct.
* struct pkt_info *p_pkt_info Information on returned buffer.
*
* OUTPUT:
* New available Rx resource in Rx descriptor ring.
*
* RETURN:
* ETH_ERROR in case the routine can not access Rx desc ring.
* ETH_OK otherwise.
*/
static ETH_FUNC_RET_STATUS eth_rx_return_buff(struct mv643xx_private *mp,
struct pkt_info *p_pkt_info)
{
int used_rx_desc; /* Where to return Rx resource */
volatile struct eth_rx_desc *p_used_rx_desc;
unsigned long flags;
spin_lock_irqsave(&mp->lock, flags);
/* Get 'used' Rx descriptor */
used_rx_desc = mp->rx_used_desc_q;
p_used_rx_desc = &mp->p_rx_desc_area[used_rx_desc];
p_used_rx_desc->buf_ptr = p_pkt_info->buf_ptr;
p_used_rx_desc->buf_size = p_pkt_info->byte_cnt;
mp->rx_skb[used_rx_desc] = p_pkt_info->return_info;
/* Flush the write pipe */
/* Return the descriptor to DMA ownership */
wmb();
p_used_rx_desc->cmd_sts =
ETH_BUFFER_OWNED_BY_DMA | ETH_RX_ENABLE_INTERRUPT;
wmb();
/* Move the used descriptor pointer to the next descriptor */
mp->rx_used_desc_q = (used_rx_desc + 1) % mp->rx_ring_size;
/* Any Rx return cancels the Rx resource error status */
mp->rx_resource_err = 0;
spin_unlock_irqrestore(&mp->lock, flags);
return ETH_OK;
}
/************* Begin ethtool support *************************/
struct mv643xx_stats {
char stat_string[ETH_GSTRING_LEN];
int sizeof_stat;
int stat_offset;
};
#define MV643XX_STAT(m) sizeof(((struct mv643xx_private *)0)->m), \
offsetof(struct mv643xx_private, m)
static const struct mv643xx_stats mv643xx_gstrings_stats[] = {
{ "rx_packets", MV643XX_STAT(stats.rx_packets) },
{ "tx_packets", MV643XX_STAT(stats.tx_packets) },
{ "rx_bytes", MV643XX_STAT(stats.rx_bytes) },
{ "tx_bytes", MV643XX_STAT(stats.tx_bytes) },
{ "rx_errors", MV643XX_STAT(stats.rx_errors) },
{ "tx_errors", MV643XX_STAT(stats.tx_errors) },
{ "rx_dropped", MV643XX_STAT(stats.rx_dropped) },
{ "tx_dropped", MV643XX_STAT(stats.tx_dropped) },
{ "good_octets_received", MV643XX_STAT(mib_counters.good_octets_received) },
{ "bad_octets_received", MV643XX_STAT(mib_counters.bad_octets_received) },
{ "internal_mac_transmit_err", MV643XX_STAT(mib_counters.internal_mac_transmit_err) },
{ "good_frames_received", MV643XX_STAT(mib_counters.good_frames_received) },
{ "bad_frames_received", MV643XX_STAT(mib_counters.bad_frames_received) },
{ "broadcast_frames_received", MV643XX_STAT(mib_counters.broadcast_frames_received) },
{ "multicast_frames_received", MV643XX_STAT(mib_counters.multicast_frames_received) },
{ "frames_64_octets", MV643XX_STAT(mib_counters.frames_64_octets) },
{ "frames_65_to_127_octets", MV643XX_STAT(mib_counters.frames_65_to_127_octets) },
{ "frames_128_to_255_octets", MV643XX_STAT(mib_counters.frames_128_to_255_octets) },
{ "frames_256_to_511_octets", MV643XX_STAT(mib_counters.frames_256_to_511_octets) },
{ "frames_512_to_1023_octets", MV643XX_STAT(mib_counters.frames_512_to_1023_octets) },
{ "frames_1024_to_max_octets", MV643XX_STAT(mib_counters.frames_1024_to_max_octets) },
{ "good_octets_sent", MV643XX_STAT(mib_counters.good_octets_sent) },
{ "good_frames_sent", MV643XX_STAT(mib_counters.good_frames_sent) },
{ "excessive_collision", MV643XX_STAT(mib_counters.excessive_collision) },
{ "multicast_frames_sent", MV643XX_STAT(mib_counters.multicast_frames_sent) },
{ "broadcast_frames_sent", MV643XX_STAT(mib_counters.broadcast_frames_sent) },
{ "unrec_mac_control_received", MV643XX_STAT(mib_counters.unrec_mac_control_received) },
{ "fc_sent", MV643XX_STAT(mib_counters.fc_sent) },
{ "good_fc_received", MV643XX_STAT(mib_counters.good_fc_received) },
{ "bad_fc_received", MV643XX_STAT(mib_counters.bad_fc_received) },
{ "undersize_received", MV643XX_STAT(mib_counters.undersize_received) },
{ "fragments_received", MV643XX_STAT(mib_counters.fragments_received) },
{ "oversize_received", MV643XX_STAT(mib_counters.oversize_received) },
{ "jabber_received", MV643XX_STAT(mib_counters.jabber_received) },
{ "mac_receive_error", MV643XX_STAT(mib_counters.mac_receive_error) },
{ "bad_crc_event", MV643XX_STAT(mib_counters.bad_crc_event) },
{ "collision", MV643XX_STAT(mib_counters.collision) },
{ "late_collision", MV643XX_STAT(mib_counters.late_collision) },
};
#define MV643XX_STATS_LEN \
sizeof(mv643xx_gstrings_stats) / sizeof(struct mv643xx_stats)
static void mv643xx_get_drvinfo(struct net_device *netdev,
struct ethtool_drvinfo *drvinfo)
{
strncpy(drvinfo->driver, mv643xx_driver_name, 32);
strncpy(drvinfo->version, mv643xx_driver_version, 32);
strncpy(drvinfo->fw_version, "N/A", 32);
strncpy(drvinfo->bus_info, "mv643xx", 32);
drvinfo->n_stats = MV643XX_STATS_LEN;
}
static int mv643xx_get_stats_count(struct net_device *netdev)
{
return MV643XX_STATS_LEN;
}
static void mv643xx_get_ethtool_stats(struct net_device *netdev,
struct ethtool_stats *stats, uint64_t *data)
{
struct mv643xx_private *mp = netdev->priv;
int i;
eth_update_mib_counters(mp);
for (i = 0; i < MV643XX_STATS_LEN; i++) {
char *p = (char *)mp+mv643xx_gstrings_stats[i].stat_offset;
data[i] = (mv643xx_gstrings_stats[i].sizeof_stat ==
sizeof(uint64_t)) ? *(uint64_t *)p : *(uint32_t *)p;
}
}
static void mv643xx_get_strings(struct net_device *netdev, uint32_t stringset,
uint8_t *data)
{
int i;
switch(stringset) {
case ETH_SS_STATS:
for (i=0; i < MV643XX_STATS_LEN; i++) {
memcpy(data + i * ETH_GSTRING_LEN,
mv643xx_gstrings_stats[i].stat_string,
ETH_GSTRING_LEN);
}
break;
}
}
static u32 mv643xx_eth_get_link(struct net_device *dev)
{
struct mv643xx_private *mp = netdev_priv(dev);
return mii_link_ok(&mp->mii);
}
static int mv643xx_eth_nway_restart(struct net_device *dev)
{
struct mv643xx_private *mp = netdev_priv(dev);
return mii_nway_restart(&mp->mii);
}
static int mv643xx_eth_do_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
{
struct mv643xx_private *mp = netdev_priv(dev);
return generic_mii_ioctl(&mp->mii, if_mii(ifr), cmd, NULL);
}
static struct ethtool_ops mv643xx_ethtool_ops = {
.get_settings = mv643xx_get_settings,
.set_settings = mv643xx_set_settings,
.get_drvinfo = mv643xx_get_drvinfo,
.get_link = mv643xx_eth_get_link,
.get_sg = ethtool_op_get_sg,
.set_sg = ethtool_op_set_sg,
.get_strings = mv643xx_get_strings,
.get_stats_count = mv643xx_get_stats_count,
.get_ethtool_stats = mv643xx_get_ethtool_stats,
.get_strings = mv643xx_get_strings,
.get_stats_count = mv643xx_get_stats_count,
.get_ethtool_stats = mv643xx_get_ethtool_stats,
.nway_reset = mv643xx_eth_nway_restart,
};
/************* End ethtool support *************************/
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