linux-hardened/drivers/net/mipsnet.c
Tim Schmielau cd354f1ae7 [PATCH] remove many unneeded #includes of sched.h
After Al Viro (finally) succeeded in removing the sched.h #include in module.h
recently, it makes sense again to remove other superfluous sched.h includes.
There are quite a lot of files which include it but don't actually need
anything defined in there.  Presumably these includes were once needed for
macros that used to live in sched.h, but moved to other header files in the
course of cleaning it up.

To ease the pain, this time I did not fiddle with any header files and only
removed #includes from .c-files, which tend to cause less trouble.

Compile tested against 2.6.20-rc2 and 2.6.20-rc2-mm2 (with offsets) on alpha,
arm, i386, ia64, mips, powerpc, and x86_64 with allnoconfig, defconfig,
allmodconfig, and allyesconfig as well as a few randconfigs on x86_64 and all
configs in arch/arm/configs on arm.  I also checked that no new warnings were
introduced by the patch (actually, some warnings are removed that were emitted
by unnecessarily included header files).

Signed-off-by: Tim Schmielau <tim@physik3.uni-rostock.de>
Acked-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-02-14 08:09:54 -08:00

370 lines
8.7 KiB
C

/*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*/
#define DEBUG
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/netdevice.h>
#include <linux/platform_device.h>
#include <asm/io.h>
#include <asm/mips-boards/simint.h>
#include "mipsnet.h" /* actual device IO mapping */
#define MIPSNET_VERSION "2005-06-20"
#define mipsnet_reg_address(dev, field) (dev->base_addr + field_offset(field))
struct mipsnet_priv {
struct net_device_stats stats;
};
static struct platform_device *mips_plat_dev;
static char mipsnet_string[] = "mipsnet";
/*
* Copy data from the MIPSNET rx data port
*/
static int ioiocpy_frommipsnet(struct net_device *dev, unsigned char *kdata,
int len)
{
uint32_t available_len = inl(mipsnet_reg_address(dev, rxDataCount));
if (available_len < len)
return -EFAULT;
for (; len > 0; len--, kdata++) {
*kdata = inb(mipsnet_reg_address(dev, rxDataBuffer));
}
return inl(mipsnet_reg_address(dev, rxDataCount));
}
static inline ssize_t mipsnet_put_todevice(struct net_device *dev,
struct sk_buff *skb)
{
int count_to_go = skb->len;
char *buf_ptr = skb->data;
struct mipsnet_priv *mp = netdev_priv(dev);
pr_debug("%s: %s(): telling MIPSNET txDataCount(%d)\n",
dev->name, __FUNCTION__, skb->len);
outl(skb->len, mipsnet_reg_address(dev, txDataCount));
pr_debug("%s: %s(): sending data to MIPSNET txDataBuffer(%d)\n",
dev->name, __FUNCTION__, skb->len);
for (; count_to_go; buf_ptr++, count_to_go--) {
outb(*buf_ptr, mipsnet_reg_address(dev, txDataBuffer));
}
mp->stats.tx_packets++;
mp->stats.tx_bytes += skb->len;
return skb->len;
}
static int mipsnet_xmit(struct sk_buff *skb, struct net_device *dev)
{
pr_debug("%s:%s(): transmitting %d bytes\n",
dev->name, __FUNCTION__, skb->len);
/* Only one packet at a time. Once TXDONE interrupt is serviced, the
* queue will be restarted.
*/
netif_stop_queue(dev);
mipsnet_put_todevice(dev, skb);
return 0;
}
static inline ssize_t mipsnet_get_fromdev(struct net_device *dev, size_t count)
{
struct sk_buff *skb;
size_t len = count;
struct mipsnet_priv *mp = netdev_priv(dev);
if (!(skb = alloc_skb(len + 2, GFP_KERNEL))) {
mp->stats.rx_dropped++;
return -ENOMEM;
}
skb_reserve(skb, 2);
if (ioiocpy_frommipsnet(dev, skb_put(skb, len), len))
return -EFAULT;
skb->dev = dev;
skb->protocol = eth_type_trans(skb, dev);
skb->ip_summed = CHECKSUM_UNNECESSARY;
pr_debug("%s:%s(): pushing RXed data to kernel\n",
dev->name, __FUNCTION__);
netif_rx(skb);
mp->stats.rx_packets++;
mp->stats.rx_bytes += len;
return count;
}
static irqreturn_t mipsnet_interrupt(int irq, void *dev_id)
{
struct net_device *dev = dev_id;
irqreturn_t retval = IRQ_NONE;
uint64_t interruptFlags;
if (irq == dev->irq) {
pr_debug("%s:%s(): irq %d for device\n",
dev->name, __FUNCTION__, irq);
retval = IRQ_HANDLED;
interruptFlags =
inl(mipsnet_reg_address(dev, interruptControl));
pr_debug("%s:%s(): intCtl=0x%016llx\n", dev->name,
__FUNCTION__, interruptFlags);
if (interruptFlags & MIPSNET_INTCTL_TXDONE) {
pr_debug("%s:%s(): got TXDone\n",
dev->name, __FUNCTION__);
outl(MIPSNET_INTCTL_TXDONE,
mipsnet_reg_address(dev, interruptControl));
// only one packet at a time, we are done.
netif_wake_queue(dev);
} else if (interruptFlags & MIPSNET_INTCTL_RXDONE) {
pr_debug("%s:%s(): got RX data\n",
dev->name, __FUNCTION__);
mipsnet_get_fromdev(dev,
inl(mipsnet_reg_address(dev, rxDataCount)));
pr_debug("%s:%s(): clearing RX int\n",
dev->name, __FUNCTION__);
outl(MIPSNET_INTCTL_RXDONE,
mipsnet_reg_address(dev, interruptControl));
} else if (interruptFlags & MIPSNET_INTCTL_TESTBIT) {
pr_debug("%s:%s(): got test interrupt\n",
dev->name, __FUNCTION__);
// TESTBIT is cleared on read.
// And takes effect after a write with 0
outl(0, mipsnet_reg_address(dev, interruptControl));
} else {
pr_debug("%s:%s(): no valid fags 0x%016llx\n",
dev->name, __FUNCTION__, interruptFlags);
// Maybe shared IRQ, just ignore, no clearing.
retval = IRQ_NONE;
}
} else {
printk(KERN_INFO "%s: %s(): irq %d for unknown device\n",
dev->name, __FUNCTION__, irq);
retval = IRQ_NONE;
}
return retval;
} //mipsnet_interrupt()
static int mipsnet_open(struct net_device *dev)
{
int err;
pr_debug("%s: mipsnet_open\n", dev->name);
err = request_irq(dev->irq, &mipsnet_interrupt,
IRQF_SHARED, dev->name, (void *) dev);
if (err) {
pr_debug("%s: %s(): can't get irq %d\n",
dev->name, __FUNCTION__, dev->irq);
release_region(dev->base_addr, MIPSNET_IO_EXTENT);
return err;
}
pr_debug("%s: %s(): got IO region at 0x%04lx and irq %d for dev.\n",
dev->name, __FUNCTION__, dev->base_addr, dev->irq);
netif_start_queue(dev);
// test interrupt handler
outl(MIPSNET_INTCTL_TESTBIT,
mipsnet_reg_address(dev, interruptControl));
return 0;
}
static int mipsnet_close(struct net_device *dev)
{
pr_debug("%s: %s()\n", dev->name, __FUNCTION__);
netif_stop_queue(dev);
return 0;
}
static struct net_device_stats *mipsnet_get_stats(struct net_device *dev)
{
struct mipsnet_priv *mp = netdev_priv(dev);
return &mp->stats;
}
static void mipsnet_set_mclist(struct net_device *dev)
{
// we don't do anything
return;
}
static int __init mipsnet_probe(struct device *dev)
{
struct net_device *netdev;
int err;
netdev = alloc_etherdev(sizeof(struct mipsnet_priv));
if (!netdev) {
err = -ENOMEM;
goto out;
}
dev_set_drvdata(dev, netdev);
netdev->open = mipsnet_open;
netdev->stop = mipsnet_close;
netdev->hard_start_xmit = mipsnet_xmit;
netdev->get_stats = mipsnet_get_stats;
netdev->set_multicast_list = mipsnet_set_mclist;
/*
* TODO: probe for these or load them from PARAM
*/
netdev->base_addr = 0x4200;
netdev->irq = MIPSCPU_INT_BASE + MIPSCPU_INT_MB0 +
inl(mipsnet_reg_address(netdev, interruptInfo));
// Get the io region now, get irq on open()
if (!request_region(netdev->base_addr, MIPSNET_IO_EXTENT, "mipsnet")) {
pr_debug("%s: %s(): IO region {start: 0x%04lux, len: %d} "
"for dev is not availble.\n", netdev->name,
__FUNCTION__, netdev->base_addr, MIPSNET_IO_EXTENT);
err = -EBUSY;
goto out_free_netdev;
}
/*
* Lacking any better mechanism to allocate a MAC address we use a
* random one ...
*/
random_ether_addr(netdev->dev_addr);
err = register_netdev(netdev);
if (err) {
printk(KERN_ERR "MIPSNet: failed to register netdev.\n");
goto out_free_region;
}
return 0;
out_free_region:
release_region(netdev->base_addr, MIPSNET_IO_EXTENT);
out_free_netdev:
free_netdev(netdev);
out:
return err;
}
static int __devexit mipsnet_device_remove(struct device *device)
{
struct net_device *dev = dev_get_drvdata(device);
unregister_netdev(dev);
release_region(dev->base_addr, MIPSNET_IO_EXTENT);
free_netdev(dev);
dev_set_drvdata(device, NULL);
return 0;
}
static struct device_driver mipsnet_driver = {
.name = mipsnet_string,
.bus = &platform_bus_type,
.probe = mipsnet_probe,
.remove = __devexit_p(mipsnet_device_remove),
};
static void mipsnet_platform_release(struct device *device)
{
struct platform_device *pldev;
/* free device */
pldev = to_platform_device(device);
kfree(pldev);
}
static int __init mipsnet_init_module(void)
{
struct platform_device *pldev;
int err;
printk(KERN_INFO "MIPSNet Ethernet driver. Version: %s. "
"(c)2005 MIPS Technologies, Inc.\n", MIPSNET_VERSION);
if (driver_register(&mipsnet_driver)) {
printk(KERN_ERR "Driver registration failed\n");
err = -ENODEV;
goto out;
}
if (!(pldev = kmalloc (sizeof (*pldev), GFP_KERNEL))) {
err = -ENOMEM;
goto out_unregister_driver;
}
memset (pldev, 0, sizeof (*pldev));
pldev->name = mipsnet_string;
pldev->id = 0;
pldev->dev.release = mipsnet_platform_release;
if (platform_device_register(pldev)) {
err = -ENODEV;
goto out_free_pldev;
}
if (!pldev->dev.driver) {
/*
* The driver was not bound to this device, there was
* no hardware at this address. Unregister it, as the
* release fuction will take care of freeing the
* allocated structure
*/
platform_device_unregister (pldev);
}
mips_plat_dev = pldev;
return 0;
out_free_pldev:
kfree(pldev);
out_unregister_driver:
driver_unregister(&mipsnet_driver);
out:
return err;
}
static void __exit mipsnet_exit_module(void)
{
pr_debug("MIPSNet Ethernet driver exiting\n");
driver_unregister(&mipsnet_driver);
}
module_init(mipsnet_init_module);
module_exit(mipsnet_exit_module);