mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-05 15:56:40 +07:00
d3561b7fa0
Create a paravirt.h header for all the critical operations which need to be replaced with hypervisor calls, and include that instead of defining native operations, when CONFIG_PARAVIRT. This patch does the dumbest possible replacement of paravirtualized instructions: calls through a "paravirt_ops" structure. Currently these are function implementations of native hardware: hypervisors will override the ops structure with their own variants. All the pv-ops functions are declared "fastcall" so that a specific register-based ABI is used, to make inlining assember easier. And: +From: Andy Whitcroft <apw@shadowen.org> The paravirt ops introduce a 'weak' attribute onto memory_setup(). Code ordering leads to the following warnings on x86: arch/i386/kernel/setup.c:651: warning: weak declaration of `memory_setup' after first use results in unspecified behavior Move memory_setup() to avoid this. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Chris Wright <chrisw@sous-sol.org> Signed-off-by: Andi Kleen <ak@suse.de> Cc: Jeremy Fitzhardinge <jeremy@goop.org> Cc: Zachary Amsden <zach@vmware.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Andy Whitcroft <apw@shadowen.org>
555 lines
14 KiB
C
555 lines
14 KiB
C
static const char version[] = "de600.c: $Revision: 1.41-2.5 $, Bjorn Ekwall (bj0rn@blox.se)\n";
|
|
/*
|
|
* de600.c
|
|
*
|
|
* Linux driver for the D-Link DE-600 Ethernet pocket adapter.
|
|
*
|
|
* Portions (C) Copyright 1993, 1994 by Bjorn Ekwall
|
|
* The Author may be reached as bj0rn@blox.se
|
|
*
|
|
* Based on adapter information gathered from DE600.ASM by D-Link Inc.,
|
|
* as included on disk C in the v.2.11 of PC/TCP from FTP Software.
|
|
* For DE600.asm:
|
|
* Portions (C) Copyright 1990 D-Link, Inc.
|
|
* Copyright, 1988-1992, Russell Nelson, Crynwr Software
|
|
*
|
|
* Adapted to the sample network driver core for linux,
|
|
* written by: Donald Becker <becker@super.org>
|
|
* (Now at <becker@scyld.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, 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., 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
*
|
|
**************************************************************/
|
|
|
|
/* Add more time here if your adapter won't work OK: */
|
|
#define DE600_SLOW_DOWN udelay(delay_time)
|
|
|
|
/*
|
|
* If you still have trouble reading/writing to the adapter,
|
|
* modify the following "#define": (see <asm/io.h> for more info)
|
|
#define REALLY_SLOW_IO
|
|
*/
|
|
|
|
/* use 0 for production, 1 for verification, >2 for debug */
|
|
#ifdef DE600_DEBUG
|
|
#define PRINTK(x) if (de600_debug >= 2) printk x
|
|
#else
|
|
#define DE600_DEBUG 0
|
|
#define PRINTK(x) /**/
|
|
#endif
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/types.h>
|
|
#include <linux/fcntl.h>
|
|
#include <linux/string.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/ioport.h>
|
|
#include <linux/in.h>
|
|
#include <asm/system.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/init.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/inet.h>
|
|
#include <linux/netdevice.h>
|
|
#include <linux/etherdevice.h>
|
|
#include <linux/skbuff.h>
|
|
|
|
#include <asm/io.h>
|
|
|
|
#include "de600.h"
|
|
|
|
static unsigned int de600_debug = DE600_DEBUG;
|
|
module_param(de600_debug, int, 0);
|
|
MODULE_PARM_DESC(de600_debug, "DE-600 debug level (0-2)");
|
|
|
|
static unsigned int check_lost = 1;
|
|
module_param(check_lost, bool, 0);
|
|
MODULE_PARM_DESC(check_lost, "If set then check for unplugged de600");
|
|
|
|
static unsigned int delay_time = 10;
|
|
module_param(delay_time, int, 0);
|
|
MODULE_PARM_DESC(delay_time, "DE-600 deley on I/O in microseconds");
|
|
|
|
|
|
/*
|
|
* D-Link driver variables:
|
|
*/
|
|
|
|
static volatile int rx_page;
|
|
|
|
#define TX_PAGES 2
|
|
static volatile int tx_fifo[TX_PAGES];
|
|
static volatile int tx_fifo_in;
|
|
static volatile int tx_fifo_out;
|
|
static volatile int free_tx_pages = TX_PAGES;
|
|
static int was_down;
|
|
static DEFINE_SPINLOCK(de600_lock);
|
|
|
|
static inline u8 de600_read_status(struct net_device *dev)
|
|
{
|
|
u8 status;
|
|
|
|
outb_p(STATUS, DATA_PORT);
|
|
status = inb(STATUS_PORT);
|
|
outb_p(NULL_COMMAND | HI_NIBBLE, DATA_PORT);
|
|
|
|
return status;
|
|
}
|
|
|
|
static inline u8 de600_read_byte(unsigned char type, struct net_device *dev)
|
|
{
|
|
/* dev used by macros */
|
|
u8 lo;
|
|
outb_p((type), DATA_PORT);
|
|
lo = ((unsigned char)inb(STATUS_PORT)) >> 4;
|
|
outb_p((type) | HI_NIBBLE, DATA_PORT);
|
|
return ((unsigned char)inb(STATUS_PORT) & (unsigned char)0xf0) | lo;
|
|
}
|
|
|
|
/*
|
|
* Open/initialize the board. This is called (in the current kernel)
|
|
* after booting when 'ifconfig <dev->name> $IP_ADDR' is run (in rc.inet1).
|
|
*
|
|
* This routine should set everything up anew at each open, even
|
|
* registers that "should" only need to be set once at boot, so that
|
|
* there is a non-reboot way to recover if something goes wrong.
|
|
*/
|
|
|
|
static int de600_open(struct net_device *dev)
|
|
{
|
|
unsigned long flags;
|
|
int ret = request_irq(DE600_IRQ, de600_interrupt, 0, dev->name, dev);
|
|
if (ret) {
|
|
printk(KERN_ERR "%s: unable to get IRQ %d\n", dev->name, DE600_IRQ);
|
|
return ret;
|
|
}
|
|
spin_lock_irqsave(&de600_lock, flags);
|
|
ret = adapter_init(dev);
|
|
spin_unlock_irqrestore(&de600_lock, flags);
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* The inverse routine to de600_open().
|
|
*/
|
|
|
|
static int de600_close(struct net_device *dev)
|
|
{
|
|
select_nic();
|
|
rx_page = 0;
|
|
de600_put_command(RESET);
|
|
de600_put_command(STOP_RESET);
|
|
de600_put_command(0);
|
|
select_prn();
|
|
free_irq(DE600_IRQ, dev);
|
|
return 0;
|
|
}
|
|
|
|
static struct net_device_stats *get_stats(struct net_device *dev)
|
|
{
|
|
return (struct net_device_stats *)(dev->priv);
|
|
}
|
|
|
|
static inline void trigger_interrupt(struct net_device *dev)
|
|
{
|
|
de600_put_command(FLIP_IRQ);
|
|
select_prn();
|
|
DE600_SLOW_DOWN;
|
|
select_nic();
|
|
de600_put_command(0);
|
|
}
|
|
|
|
/*
|
|
* Copy a buffer to the adapter transmit page memory.
|
|
* Start sending.
|
|
*/
|
|
|
|
static int de600_start_xmit(struct sk_buff *skb, struct net_device *dev)
|
|
{
|
|
unsigned long flags;
|
|
int transmit_from;
|
|
int len;
|
|
int tickssofar;
|
|
u8 *buffer = skb->data;
|
|
int i;
|
|
|
|
if (free_tx_pages <= 0) { /* Do timeouts, to avoid hangs. */
|
|
tickssofar = jiffies - dev->trans_start;
|
|
if (tickssofar < 5)
|
|
return 1;
|
|
/* else */
|
|
printk(KERN_WARNING "%s: transmit timed out (%d), %s?\n", dev->name, tickssofar, "network cable problem");
|
|
/* Restart the adapter. */
|
|
spin_lock_irqsave(&de600_lock, flags);
|
|
if (adapter_init(dev)) {
|
|
spin_unlock_irqrestore(&de600_lock, flags);
|
|
return 1;
|
|
}
|
|
spin_unlock_irqrestore(&de600_lock, flags);
|
|
}
|
|
|
|
/* Start real output */
|
|
PRINTK(("de600_start_xmit:len=%d, page %d/%d\n", skb->len, tx_fifo_in, free_tx_pages));
|
|
|
|
if ((len = skb->len) < RUNT)
|
|
len = RUNT;
|
|
|
|
spin_lock_irqsave(&de600_lock, flags);
|
|
select_nic();
|
|
tx_fifo[tx_fifo_in] = transmit_from = tx_page_adr(tx_fifo_in) - len;
|
|
tx_fifo_in = (tx_fifo_in + 1) % TX_PAGES; /* Next free tx page */
|
|
|
|
if(check_lost)
|
|
{
|
|
/* This costs about 40 instructions per packet... */
|
|
de600_setup_address(NODE_ADDRESS, RW_ADDR);
|
|
de600_read_byte(READ_DATA, dev);
|
|
if (was_down || (de600_read_byte(READ_DATA, dev) != 0xde)) {
|
|
if (adapter_init(dev)) {
|
|
spin_unlock_irqrestore(&de600_lock, flags);
|
|
return 1;
|
|
}
|
|
}
|
|
}
|
|
|
|
de600_setup_address(transmit_from, RW_ADDR);
|
|
for (i = 0; i < skb->len ; ++i, ++buffer)
|
|
de600_put_byte(*buffer);
|
|
for (; i < len; ++i)
|
|
de600_put_byte(0);
|
|
|
|
if (free_tx_pages-- == TX_PAGES) { /* No transmission going on */
|
|
dev->trans_start = jiffies;
|
|
netif_start_queue(dev); /* allow more packets into adapter */
|
|
/* Send page and generate a faked interrupt */
|
|
de600_setup_address(transmit_from, TX_ADDR);
|
|
de600_put_command(TX_ENABLE);
|
|
}
|
|
else {
|
|
if (free_tx_pages)
|
|
netif_start_queue(dev);
|
|
else
|
|
netif_stop_queue(dev);
|
|
select_prn();
|
|
}
|
|
spin_unlock_irqrestore(&de600_lock, flags);
|
|
dev_kfree_skb(skb);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* The typical workload of the driver:
|
|
* Handle the network interface interrupts.
|
|
*/
|
|
|
|
static irqreturn_t de600_interrupt(int irq, void *dev_id)
|
|
{
|
|
struct net_device *dev = dev_id;
|
|
u8 irq_status;
|
|
int retrig = 0;
|
|
int boguscount = 0;
|
|
|
|
spin_lock(&de600_lock);
|
|
|
|
select_nic();
|
|
irq_status = de600_read_status(dev);
|
|
|
|
do {
|
|
PRINTK(("de600_interrupt (%02X)\n", irq_status));
|
|
|
|
if (irq_status & RX_GOOD)
|
|
de600_rx_intr(dev);
|
|
else if (!(irq_status & RX_BUSY))
|
|
de600_put_command(RX_ENABLE);
|
|
|
|
/* Any transmission in progress? */
|
|
if (free_tx_pages < TX_PAGES)
|
|
retrig = de600_tx_intr(dev, irq_status);
|
|
else
|
|
retrig = 0;
|
|
|
|
irq_status = de600_read_status(dev);
|
|
} while ( (irq_status & RX_GOOD) || ((++boguscount < 100) && retrig) );
|
|
/*
|
|
* Yeah, it _looks_ like busy waiting, smells like busy waiting
|
|
* and I know it's not PC, but please, it will only occur once
|
|
* in a while and then only for a loop or so (< 1ms for sure!)
|
|
*/
|
|
|
|
/* Enable adapter interrupts */
|
|
select_prn();
|
|
if (retrig)
|
|
trigger_interrupt(dev);
|
|
spin_unlock(&de600_lock);
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static int de600_tx_intr(struct net_device *dev, int irq_status)
|
|
{
|
|
/*
|
|
* Returns 1 if tx still not done
|
|
*/
|
|
|
|
/* Check if current transmission is done yet */
|
|
if (irq_status & TX_BUSY)
|
|
return 1; /* tx not done, try again */
|
|
|
|
/* else */
|
|
/* If last transmission OK then bump fifo index */
|
|
if (!(irq_status & TX_FAILED16)) {
|
|
tx_fifo_out = (tx_fifo_out + 1) % TX_PAGES;
|
|
++free_tx_pages;
|
|
((struct net_device_stats *)(dev->priv))->tx_packets++;
|
|
netif_wake_queue(dev);
|
|
}
|
|
|
|
/* More to send, or resend last packet? */
|
|
if ((free_tx_pages < TX_PAGES) || (irq_status & TX_FAILED16)) {
|
|
dev->trans_start = jiffies;
|
|
de600_setup_address(tx_fifo[tx_fifo_out], TX_ADDR);
|
|
de600_put_command(TX_ENABLE);
|
|
return 1;
|
|
}
|
|
/* else */
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* We have a good packet, get it out of the adapter.
|
|
*/
|
|
static void de600_rx_intr(struct net_device *dev)
|
|
{
|
|
struct sk_buff *skb;
|
|
int i;
|
|
int read_from;
|
|
int size;
|
|
unsigned char *buffer;
|
|
|
|
/* Get size of received packet */
|
|
size = de600_read_byte(RX_LEN, dev); /* low byte */
|
|
size += (de600_read_byte(RX_LEN, dev) << 8); /* high byte */
|
|
size -= 4; /* Ignore trailing 4 CRC-bytes */
|
|
|
|
/* Tell adapter where to store next incoming packet, enable receiver */
|
|
read_from = rx_page_adr();
|
|
next_rx_page();
|
|
de600_put_command(RX_ENABLE);
|
|
|
|
if ((size < 32) || (size > 1535)) {
|
|
printk(KERN_WARNING "%s: Bogus packet size %d.\n", dev->name, size);
|
|
if (size > 10000)
|
|
adapter_init(dev);
|
|
return;
|
|
}
|
|
|
|
skb = dev_alloc_skb(size+2);
|
|
if (skb == NULL) {
|
|
printk("%s: Couldn't allocate a sk_buff of size %d.\n", dev->name, size);
|
|
return;
|
|
}
|
|
/* else */
|
|
|
|
skb->dev = dev;
|
|
skb_reserve(skb,2); /* Align */
|
|
|
|
/* 'skb->data' points to the start of sk_buff data area. */
|
|
buffer = skb_put(skb,size);
|
|
|
|
/* copy the packet into the buffer */
|
|
de600_setup_address(read_from, RW_ADDR);
|
|
for (i = size; i > 0; --i, ++buffer)
|
|
*buffer = de600_read_byte(READ_DATA, dev);
|
|
|
|
skb->protocol=eth_type_trans(skb,dev);
|
|
|
|
netif_rx(skb);
|
|
|
|
/* update stats */
|
|
dev->last_rx = jiffies;
|
|
((struct net_device_stats *)(dev->priv))->rx_packets++; /* count all receives */
|
|
((struct net_device_stats *)(dev->priv))->rx_bytes += size; /* count all received bytes */
|
|
|
|
/*
|
|
* If any worth-while packets have been received, netif_rx()
|
|
* will work on them when we get to the tasklets.
|
|
*/
|
|
}
|
|
|
|
static struct net_device * __init de600_probe(void)
|
|
{
|
|
int i;
|
|
struct net_device *dev;
|
|
int err;
|
|
|
|
dev = alloc_etherdev(sizeof(struct net_device_stats));
|
|
if (!dev)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
SET_MODULE_OWNER(dev);
|
|
|
|
if (!request_region(DE600_IO, 3, "de600")) {
|
|
printk(KERN_WARNING "DE600: port 0x%x busy\n", DE600_IO);
|
|
err = -EBUSY;
|
|
goto out;
|
|
}
|
|
|
|
printk(KERN_INFO "%s: D-Link DE-600 pocket adapter", dev->name);
|
|
/* Alpha testers must have the version number to report bugs. */
|
|
if (de600_debug > 1)
|
|
printk(version);
|
|
|
|
/* probe for adapter */
|
|
err = -ENODEV;
|
|
rx_page = 0;
|
|
select_nic();
|
|
(void)de600_read_status(dev);
|
|
de600_put_command(RESET);
|
|
de600_put_command(STOP_RESET);
|
|
if (de600_read_status(dev) & 0xf0) {
|
|
printk(": not at I/O %#3x.\n", DATA_PORT);
|
|
goto out1;
|
|
}
|
|
|
|
/*
|
|
* Maybe we found one,
|
|
* have to check if it is a D-Link DE-600 adapter...
|
|
*/
|
|
|
|
/* Get the adapter ethernet address from the ROM */
|
|
de600_setup_address(NODE_ADDRESS, RW_ADDR);
|
|
for (i = 0; i < ETH_ALEN; i++) {
|
|
dev->dev_addr[i] = de600_read_byte(READ_DATA, dev);
|
|
dev->broadcast[i] = 0xff;
|
|
}
|
|
|
|
/* Check magic code */
|
|
if ((dev->dev_addr[1] == 0xde) && (dev->dev_addr[2] == 0x15)) {
|
|
/* OK, install real address */
|
|
dev->dev_addr[0] = 0x00;
|
|
dev->dev_addr[1] = 0x80;
|
|
dev->dev_addr[2] = 0xc8;
|
|
dev->dev_addr[3] &= 0x0f;
|
|
dev->dev_addr[3] |= 0x70;
|
|
} else {
|
|
printk(" not identified in the printer port\n");
|
|
goto out1;
|
|
}
|
|
|
|
printk(", Ethernet Address: %02X", dev->dev_addr[0]);
|
|
for (i = 1; i < ETH_ALEN; i++)
|
|
printk(":%02X",dev->dev_addr[i]);
|
|
printk("\n");
|
|
|
|
dev->get_stats = get_stats;
|
|
|
|
dev->open = de600_open;
|
|
dev->stop = de600_close;
|
|
dev->hard_start_xmit = &de600_start_xmit;
|
|
|
|
dev->flags&=~IFF_MULTICAST;
|
|
|
|
select_prn();
|
|
|
|
err = register_netdev(dev);
|
|
if (err)
|
|
goto out1;
|
|
|
|
return dev;
|
|
|
|
out1:
|
|
release_region(DE600_IO, 3);
|
|
out:
|
|
free_netdev(dev);
|
|
return ERR_PTR(err);
|
|
}
|
|
|
|
static int adapter_init(struct net_device *dev)
|
|
{
|
|
int i;
|
|
|
|
select_nic();
|
|
rx_page = 0; /* used by RESET */
|
|
de600_put_command(RESET);
|
|
de600_put_command(STOP_RESET);
|
|
|
|
/* Check if it is still there... */
|
|
/* Get the some bytes of the adapter ethernet address from the ROM */
|
|
de600_setup_address(NODE_ADDRESS, RW_ADDR);
|
|
de600_read_byte(READ_DATA, dev);
|
|
if ((de600_read_byte(READ_DATA, dev) != 0xde) ||
|
|
(de600_read_byte(READ_DATA, dev) != 0x15)) {
|
|
/* was: if (de600_read_status(dev) & 0xf0) { */
|
|
printk("Something has happened to the DE-600! Please check it and do a new ifconfig!\n");
|
|
/* Goodbye, cruel world... */
|
|
dev->flags &= ~IFF_UP;
|
|
de600_close(dev);
|
|
was_down = 1;
|
|
netif_stop_queue(dev); /* Transmit busy... */
|
|
return 1; /* failed */
|
|
}
|
|
|
|
if (was_down) {
|
|
printk(KERN_INFO "%s: Thanks, I feel much better now!\n", dev->name);
|
|
was_down = 0;
|
|
}
|
|
|
|
tx_fifo_in = 0;
|
|
tx_fifo_out = 0;
|
|
free_tx_pages = TX_PAGES;
|
|
|
|
|
|
/* set the ether address. */
|
|
de600_setup_address(NODE_ADDRESS, RW_ADDR);
|
|
for (i = 0; i < ETH_ALEN; i++)
|
|
de600_put_byte(dev->dev_addr[i]);
|
|
|
|
/* where to start saving incoming packets */
|
|
rx_page = RX_BP | RX_BASE_PAGE;
|
|
de600_setup_address(MEM_4K, RW_ADDR);
|
|
/* Enable receiver */
|
|
de600_put_command(RX_ENABLE);
|
|
select_prn();
|
|
|
|
netif_start_queue(dev);
|
|
|
|
return 0; /* OK */
|
|
}
|
|
|
|
static struct net_device *de600_dev;
|
|
|
|
static int __init de600_init(void)
|
|
{
|
|
de600_dev = de600_probe();
|
|
if (IS_ERR(de600_dev))
|
|
return PTR_ERR(de600_dev);
|
|
return 0;
|
|
}
|
|
|
|
static void __exit de600_exit(void)
|
|
{
|
|
unregister_netdev(de600_dev);
|
|
release_region(DE600_IO, 3);
|
|
free_netdev(de600_dev);
|
|
}
|
|
|
|
module_init(de600_init);
|
|
module_exit(de600_exit);
|
|
|
|
MODULE_LICENSE("GPL");
|