swh:1:snp:c3bf2749e3476071fa748f67b0ffa2fdc5fe49d9
Tip revision: b37fa16e78d6f9790462b3181602a26b5af36260 authored by Linus Torvalds on 22 July 2010, 19:13:38 UTC
Linux 2.6.35-rc6
Linux 2.6.35-rc6
Tip revision: b37fa16
et131x_netdev.c
/*
* Agere Systems Inc.
* 10/100/1000 Base-T Ethernet Driver for the ET1301 and ET131x series MACs
*
* Copyright © 2005 Agere Systems Inc.
* All rights reserved.
* http://www.agere.com
*
*------------------------------------------------------------------------------
*
* et131x_netdev.c - Routines and data required by all Linux network devices.
*
*------------------------------------------------------------------------------
*
* SOFTWARE LICENSE
*
* This software is provided subject to the following terms and conditions,
* which you should read carefully before using the software. Using this
* software indicates your acceptance of these terms and conditions. If you do
* not agree with these terms and conditions, do not use the software.
*
* Copyright © 2005 Agere Systems Inc.
* All rights reserved.
*
* Redistribution and use in source or binary forms, with or without
* modifications, are permitted provided that the following conditions are met:
*
* . Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following Disclaimer as comments in the code as
* well as in the documentation and/or other materials provided with the
* distribution.
*
* . Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following Disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* . Neither the name of Agere Systems Inc. nor the names of the contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* Disclaimer
*
* THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, INFRINGEMENT AND THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. ANY
* USE, MODIFICATION OR DISTRIBUTION OF THIS SOFTWARE IS SOLELY AT THE USERS OWN
* RISK. IN NO EVENT SHALL AGERE SYSTEMS INC. OR CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, INCLUDING, BUT NOT LIMITED TO, CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
* DAMAGE.
*
*/
#include "et131x_version.h"
#include "et131x_defs.h"
#include <linux/init.h>
#include <linux/module.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/ptrace.h>
#include <linux/ctype.h>
#include <linux/string.h>
#include <linux/timer.h>
#include <linux/interrupt.h>
#include <linux/in.h>
#include <linux/delay.h>
#include <linux/io.h>
#include <linux/bitops.h>
#include <linux/pci.h>
#include <asm/system.h>
#include <linux/mii.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include <linux/if_arp.h>
#include <linux/ioport.h>
#include "et1310_phy.h"
#include "et1310_tx.h"
#include "et131x_adapter.h"
#include "et131x.h"
struct net_device_stats *et131x_stats(struct net_device *netdev);
int et131x_open(struct net_device *netdev);
int et131x_close(struct net_device *netdev);
int et131x_ioctl(struct net_device *netdev, struct ifreq *reqbuf, int cmd);
void et131x_multicast(struct net_device *netdev);
int et131x_tx(struct sk_buff *skb, struct net_device *netdev);
void et131x_tx_timeout(struct net_device *netdev);
int et131x_change_mtu(struct net_device *netdev, int new_mtu);
int et131x_set_mac_addr(struct net_device *netdev, void *new_mac);
void et131x_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp);
void et131x_vlan_rx_add_vid(struct net_device *netdev, uint16_t vid);
void et131x_vlan_rx_kill_vid(struct net_device *netdev, uint16_t vid);
static const struct net_device_ops et131x_netdev_ops = {
.ndo_open = et131x_open,
.ndo_stop = et131x_close,
.ndo_start_xmit = et131x_tx,
.ndo_set_multicast_list = et131x_multicast,
.ndo_tx_timeout = et131x_tx_timeout,
.ndo_change_mtu = et131x_change_mtu,
.ndo_set_mac_address = et131x_set_mac_addr,
.ndo_validate_addr = eth_validate_addr,
.ndo_get_stats = et131x_stats,
.ndo_do_ioctl = et131x_ioctl,
};
/**
* et131x_device_alloc
*
* Returns pointer to the allocated and initialized net_device struct for
* this device.
*
* Create instances of net_device and wl_private for the new adapter and
* register the device's entry points in the net_device structure.
*/
struct net_device *et131x_device_alloc(void)
{
struct net_device *netdev;
/* Alloc net_device and adapter structs */
netdev = alloc_etherdev(sizeof(struct et131x_adapter));
if (netdev == NULL) {
printk(KERN_ERR "et131x: Alloc of net_device struct failed\n");
return NULL;
}
/* Setup the function registration table (and other data) for a
* net_device
*/
/* netdev->init = &et131x_init; */
/* netdev->set_config = &et131x_config; */
netdev->watchdog_timeo = ET131X_TX_TIMEOUT;
netdev->netdev_ops = &et131x_netdev_ops;
/* netdev->ethtool_ops = &et131x_ethtool_ops; */
/* Poll? */
/* netdev->poll = &et131x_poll; */
/* netdev->poll_controller = &et131x_poll_controller; */
return netdev;
}
/**
* et131x_stats - Return the current device statistics.
* @netdev: device whose stats are being queried
*
* Returns 0 on success, errno on failure (as defined in errno.h)
*/
struct net_device_stats *et131x_stats(struct net_device *netdev)
{
struct et131x_adapter *adapter = netdev_priv(netdev);
struct net_device_stats *stats = &adapter->net_stats;
CE_STATS_t *devstat = &adapter->Stats;
stats->rx_packets = devstat->ipackets;
stats->tx_packets = devstat->opackets;
stats->rx_errors = devstat->length_err + devstat->alignment_err +
devstat->crc_err + devstat->code_violations + devstat->other_errors;
stats->tx_errors = devstat->max_pkt_error;
stats->multicast = devstat->multircv;
stats->collisions = devstat->collisions;
stats->rx_length_errors = devstat->length_err;
stats->rx_over_errors = devstat->rx_ov_flow;
stats->rx_crc_errors = devstat->crc_err;
/* NOTE: These stats don't have corresponding values in CE_STATS,
* so we're going to have to update these directly from within the
* TX/RX code
*/
/* stats->rx_bytes = 20; devstat->; */
/* stats->tx_bytes = 20; devstat->; */
/* stats->rx_dropped = devstat->; */
/* stats->tx_dropped = devstat->; */
/* NOTE: Not used, can't find analogous statistics */
/* stats->rx_frame_errors = devstat->; */
/* stats->rx_fifo_errors = devstat->; */
/* stats->rx_missed_errors = devstat->; */
/* stats->tx_aborted_errors = devstat->; */
/* stats->tx_carrier_errors = devstat->; */
/* stats->tx_fifo_errors = devstat->; */
/* stats->tx_heartbeat_errors = devstat->; */
/* stats->tx_window_errors = devstat->; */
return stats;
}
/**
* et131x_open - Open the device for use.
* @netdev: device to be opened
*
* Returns 0 on success, errno on failure (as defined in errno.h)
*/
int et131x_open(struct net_device *netdev)
{
int result = 0;
struct et131x_adapter *adapter = netdev_priv(netdev);
/* Start the timer to track NIC errors */
add_timer(&adapter->ErrorTimer);
/* Register our IRQ */
result = request_irq(netdev->irq, et131x_isr, IRQF_SHARED,
netdev->name, netdev);
if (result) {
dev_err(&adapter->pdev->dev, "c ould not register IRQ %d\n",
netdev->irq);
return result;
}
/* Enable the Tx and Rx DMA engines (if not already enabled) */
et131x_rx_dma_enable(adapter);
et131x_tx_dma_enable(adapter);
/* Enable device interrupts */
et131x_enable_interrupts(adapter);
adapter->Flags |= fMP_ADAPTER_INTERRUPT_IN_USE;
/* We're ready to move some data, so start the queue */
netif_start_queue(netdev);
return result;
}
/**
* et131x_close - Close the device
* @netdev: device to be closed
*
* Returns 0 on success, errno on failure (as defined in errno.h)
*/
int et131x_close(struct net_device *netdev)
{
struct et131x_adapter *adapter = netdev_priv(netdev);
/* First thing is to stop the queue */
netif_stop_queue(netdev);
/* Stop the Tx and Rx DMA engines */
et131x_rx_dma_disable(adapter);
et131x_tx_dma_disable(adapter);
/* Disable device interrupts */
et131x_disable_interrupts(adapter);
/* Deregistering ISR */
adapter->Flags &= ~fMP_ADAPTER_INTERRUPT_IN_USE;
free_irq(netdev->irq, netdev);
/* Stop the error timer */
del_timer_sync(&adapter->ErrorTimer);
return 0;
}
/**
* et131x_ioctl_mii - The function which handles MII IOCTLs
* @netdev: device on which the query is being made
* @reqbuf: the request-specific data buffer
* @cmd: the command request code
*
* Returns 0 on success, errno on failure (as defined in errno.h)
*/
int et131x_ioctl_mii(struct net_device *netdev, struct ifreq *reqbuf, int cmd)
{
int status = 0;
struct et131x_adapter *etdev = netdev_priv(netdev);
struct mii_ioctl_data *data = if_mii(reqbuf);
switch (cmd) {
case SIOCGMIIPHY:
data->phy_id = etdev->Stats.xcvr_addr;
break;
case SIOCGMIIREG:
if (!capable(CAP_NET_ADMIN))
status = -EPERM;
else
status = MiRead(etdev,
data->reg_num, &data->val_out);
break;
case SIOCSMIIREG:
if (!capable(CAP_NET_ADMIN))
status = -EPERM;
else
status = MiWrite(etdev, data->reg_num,
data->val_in);
break;
default:
status = -EOPNOTSUPP;
}
return status;
}
/**
* et131x_ioctl - The I/O Control handler for the driver
* @netdev: device on which the control request is being made
* @reqbuf: a pointer to the IOCTL request buffer
* @cmd: the IOCTL command code
*
* Returns 0 on success, errno on failure (as defined in errno.h)
*/
int et131x_ioctl(struct net_device *netdev, struct ifreq *reqbuf, int cmd)
{
int status = 0;
switch (cmd) {
case SIOCGMIIPHY:
case SIOCGMIIREG:
case SIOCSMIIREG:
status = et131x_ioctl_mii(netdev, reqbuf, cmd);
break;
default:
status = -EOPNOTSUPP;
}
return status;
}
/**
* et131x_set_packet_filter - Configures the Rx Packet filtering on the device
* @adapter: pointer to our private adapter structure
*
* FIXME: lot of dups with MAC code
*
* Returns 0 on success, errno on failure
*/
int et131x_set_packet_filter(struct et131x_adapter *adapter)
{
int status = 0;
uint32_t filter = adapter->PacketFilter;
u32 ctrl;
u32 pf_ctrl;
ctrl = readl(&adapter->regs->rxmac.ctrl);
pf_ctrl = readl(&adapter->regs->rxmac.pf_ctrl);
/* Default to disabled packet filtering. Enable it in the individual
* case statements that require the device to filter something
*/
ctrl |= 0x04;
/* Set us to be in promiscuous mode so we receive everything, this
* is also true when we get a packet filter of 0
*/
if ((filter & ET131X_PACKET_TYPE_PROMISCUOUS) || filter == 0)
pf_ctrl &= ~7; /* Clear filter bits */
else {
/*
* Set us up with Multicast packet filtering. Three cases are
* possible - (1) we have a multi-cast list, (2) we receive ALL
* multicast entries or (3) we receive none.
*/
if (filter & ET131X_PACKET_TYPE_ALL_MULTICAST)
pf_ctrl &= ~2; /* Multicast filter bit */
else {
SetupDeviceForMulticast(adapter);
pf_ctrl |= 2;
ctrl &= ~0x04;
}
/* Set us up with Unicast packet filtering */
if (filter & ET131X_PACKET_TYPE_DIRECTED) {
SetupDeviceForUnicast(adapter);
pf_ctrl |= 4;
ctrl &= ~0x04;
}
/* Set us up with Broadcast packet filtering */
if (filter & ET131X_PACKET_TYPE_BROADCAST) {
pf_ctrl |= 1; /* Broadcast filter bit */
ctrl &= ~0x04;
} else
pf_ctrl &= ~1;
/* Setup the receive mac configuration registers - Packet
* Filter control + the enable / disable for packet filter
* in the control reg.
*/
writel(pf_ctrl, &adapter->regs->rxmac.pf_ctrl);
writel(ctrl, &adapter->regs->rxmac.ctrl);
}
return status;
}
/**
* et131x_multicast - The handler to configure multicasting on the interface
* @netdev: a pointer to a net_device struct representing the device
*/
void et131x_multicast(struct net_device *netdev)
{
struct et131x_adapter *adapter = netdev_priv(netdev);
uint32_t PacketFilter = 0;
unsigned long flags;
struct netdev_hw_addr *ha;
int i;
spin_lock_irqsave(&adapter->Lock, flags);
/* Before we modify the platform-independent filter flags, store them
* locally. This allows us to determine if anything's changed and if
* we even need to bother the hardware
*/
PacketFilter = adapter->PacketFilter;
/* Clear the 'multicast' flag locally; becuase we only have a single
* flag to check multicast, and multiple multicast addresses can be
* set, this is the easiest way to determine if more than one
* multicast address is being set.
*/
PacketFilter &= ~ET131X_PACKET_TYPE_MULTICAST;
/* Check the net_device flags and set the device independent flags
* accordingly
*/
if (netdev->flags & IFF_PROMISC)
adapter->PacketFilter |= ET131X_PACKET_TYPE_PROMISCUOUS;
else
adapter->PacketFilter &= ~ET131X_PACKET_TYPE_PROMISCUOUS;
if (netdev->flags & IFF_ALLMULTI)
adapter->PacketFilter |= ET131X_PACKET_TYPE_ALL_MULTICAST;
if (netdev_mc_count(netdev) > NIC_MAX_MCAST_LIST)
adapter->PacketFilter |= ET131X_PACKET_TYPE_ALL_MULTICAST;
if (netdev_mc_count(netdev) < 1) {
adapter->PacketFilter &= ~ET131X_PACKET_TYPE_ALL_MULTICAST;
adapter->PacketFilter &= ~ET131X_PACKET_TYPE_MULTICAST;
} else
adapter->PacketFilter |= ET131X_PACKET_TYPE_MULTICAST;
/* Set values in the private adapter struct */
i = 0;
netdev_for_each_mc_addr(ha, netdev) {
if (i == NIC_MAX_MCAST_LIST)
break;
memcpy(adapter->MCList[i++], ha->addr, ETH_ALEN);
}
adapter->MCAddressCount = i;
/* Are the new flags different from the previous ones? If not, then no
* action is required
*
* NOTE - This block will always update the MCList with the hardware,
* even if the addresses aren't the same.
*/
if (PacketFilter != adapter->PacketFilter) {
/* Call the device's filter function */
et131x_set_packet_filter(adapter);
}
spin_unlock_irqrestore(&adapter->Lock, flags);
}
/**
* et131x_tx - The handler to tx a packet on the device
* @skb: data to be Tx'd
* @netdev: device on which data is to be Tx'd
*
* Returns 0 on success, errno on failure (as defined in errno.h)
*/
int et131x_tx(struct sk_buff *skb, struct net_device *netdev)
{
int status = 0;
/* Save the timestamp for the TX timeout watchdog */
netdev->trans_start = jiffies;
/* Call the device-specific data Tx routine */
status = et131x_send_packets(skb, netdev);
/* Check status and manage the netif queue if necessary */
if (status != 0) {
if (status == -ENOMEM) {
/* Put the queue to sleep until resources are
* available
*/
netif_stop_queue(netdev);
status = NETDEV_TX_BUSY;
} else {
status = NETDEV_TX_OK;
}
}
return status;
}
/**
* et131x_tx_timeout - Timeout handler
* @netdev: a pointer to a net_device struct representing the device
*
* The handler called when a Tx request times out. The timeout period is
* specified by the 'tx_timeo" element in the net_device structure (see
* et131x_alloc_device() to see how this value is set).
*/
void et131x_tx_timeout(struct net_device *netdev)
{
struct et131x_adapter *etdev = netdev_priv(netdev);
struct tcb *tcb;
unsigned long flags;
/* Just skip this part if the adapter is doing link detection */
if (etdev->Flags & fMP_ADAPTER_LINK_DETECTION)
return;
/* Any nonrecoverable hardware error?
* Checks adapter->flags for any failure in phy reading
*/
if (etdev->Flags & fMP_ADAPTER_NON_RECOVER_ERROR)
return;
/* Hardware failure? */
if (etdev->Flags & fMP_ADAPTER_HARDWARE_ERROR) {
dev_err(&etdev->pdev->dev, "hardware error - reset\n");
return;
}
/* Is send stuck? */
spin_lock_irqsave(&etdev->TCBSendQLock, flags);
tcb = etdev->tx_ring.send_head;
if (tcb != NULL) {
tcb->count++;
if (tcb->count > NIC_SEND_HANG_THRESHOLD) {
spin_unlock_irqrestore(&etdev->TCBSendQLock,
flags);
dev_warn(&etdev->pdev->dev,
"Send stuck - reset. tcb->WrIndex %x, Flags 0x%08x\n",
tcb->index,
tcb->flags);
et131x_close(netdev);
et131x_open(netdev);
return;
}
}
spin_unlock_irqrestore(&etdev->TCBSendQLock, flags);
}
/**
* et131x_change_mtu - The handler called to change the MTU for the device
* @netdev: device whose MTU is to be changed
* @new_mtu: the desired MTU
*
* Returns 0 on success, errno on failure (as defined in errno.h)
*/
int et131x_change_mtu(struct net_device *netdev, int new_mtu)
{
int result = 0;
struct et131x_adapter *adapter = netdev_priv(netdev);
/* Make sure the requested MTU is valid */
if (new_mtu < 64 || new_mtu > 9216)
return -EINVAL;
/* Stop the netif queue */
netif_stop_queue(netdev);
/* Stop the Tx and Rx DMA engines */
et131x_rx_dma_disable(adapter);
et131x_tx_dma_disable(adapter);
/* Disable device interrupts */
et131x_disable_interrupts(adapter);
et131x_handle_send_interrupt(adapter);
et131x_handle_recv_interrupt(adapter);
/* Set the new MTU */
netdev->mtu = new_mtu;
/* Free Rx DMA memory */
et131x_adapter_memory_free(adapter);
/* Set the config parameter for Jumbo Packet support */
adapter->RegistryJumboPacket = new_mtu + 14;
et131x_soft_reset(adapter);
/* Alloc and init Rx DMA memory */
result = et131x_adapter_memory_alloc(adapter);
if (result != 0) {
dev_warn(&adapter->pdev->dev,
"Change MTU failed; couldn't re-alloc DMA memory\n");
return result;
}
et131x_init_send(adapter);
et131x_hwaddr_init(adapter);
memcpy(netdev->dev_addr, adapter->CurrentAddress, ETH_ALEN);
/* Init the device with the new settings */
et131x_adapter_setup(adapter);
/* Enable interrupts */
if (adapter->Flags & fMP_ADAPTER_INTERRUPT_IN_USE)
et131x_enable_interrupts(adapter);
/* Restart the Tx and Rx DMA engines */
et131x_rx_dma_enable(adapter);
et131x_tx_dma_enable(adapter);
/* Restart the netif queue */
netif_wake_queue(netdev);
return result;
}
/**
* et131x_set_mac_addr - handler to change the MAC address for the device
* @netdev: device whose MAC is to be changed
* @new_mac: the desired MAC address
*
* Returns 0 on success, errno on failure (as defined in errno.h)
*
* IMPLEMENTED BY : blux http://berndlux.de 22.01.2007 21:14
*/
int et131x_set_mac_addr(struct net_device *netdev, void *new_mac)
{
int result = 0;
struct et131x_adapter *adapter = netdev_priv(netdev);
struct sockaddr *address = new_mac;
/* begin blux */
if (adapter == NULL)
return -ENODEV;
/* Make sure the requested MAC is valid */
if (!is_valid_ether_addr(address->sa_data))
return -EINVAL;
/* Stop the netif queue */
netif_stop_queue(netdev);
/* Stop the Tx and Rx DMA engines */
et131x_rx_dma_disable(adapter);
et131x_tx_dma_disable(adapter);
/* Disable device interrupts */
et131x_disable_interrupts(adapter);
et131x_handle_send_interrupt(adapter);
et131x_handle_recv_interrupt(adapter);
/* Set the new MAC */
/* netdev->set_mac_address = &new_mac; */
/* netdev->mtu = new_mtu; */
memcpy(netdev->dev_addr, address->sa_data, netdev->addr_len);
printk(KERN_INFO "%s: Setting MAC address to %pM\n",
netdev->name, netdev->dev_addr);
/* Free Rx DMA memory */
et131x_adapter_memory_free(adapter);
/* Set the config parameter for Jumbo Packet support */
/* adapter->RegistryJumboPacket = new_mtu + 14; */
/* blux: not needet here, we'll change the MAC */
et131x_soft_reset(adapter);
/* Alloc and init Rx DMA memory */
result = et131x_adapter_memory_alloc(adapter);
if (result != 0) {
dev_err(&adapter->pdev->dev,
"Change MAC failed; couldn't re-alloc DMA memory\n");
return result;
}
et131x_init_send(adapter);
et131x_hwaddr_init(adapter);
/* Init the device with the new settings */
et131x_adapter_setup(adapter);
/* Enable interrupts */
if (adapter->Flags & fMP_ADAPTER_INTERRUPT_IN_USE)
et131x_enable_interrupts(adapter);
/* Restart the Tx and Rx DMA engines */
et131x_rx_dma_enable(adapter);
et131x_tx_dma_enable(adapter);
/* Restart the netif queue */
netif_wake_queue(netdev);
return result;
}