mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-29 20:06:38 +07:00
2187f287e2
Changes to last version: - use netdev_alloc_skb - make init_rx_bufs just fail and not panic, if skb alloc fails - don/t free_irq, if request_irq failed Thomas. Extracted chip specific code out of lasi_82596.c and placed into a lib82596.c to make it usable for other 82596 drivers Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Signed-off-by: Jeff Garzik <jeff@garzik.org>
240 lines
6.7 KiB
C
240 lines
6.7 KiB
C
/* lasi_82596.c -- driver for the intel 82596 ethernet controller, as
|
|
munged into HPPA boxen .
|
|
|
|
This driver is based upon 82596.c, original credits are below...
|
|
but there were too many hoops which HP wants jumped through to
|
|
keep this code in there in a sane manner.
|
|
|
|
3 primary sources of the mess --
|
|
1) hppa needs *lots* of cacheline flushing to keep this kind of
|
|
MMIO running.
|
|
|
|
2) The 82596 needs to see all of its pointers as their physical
|
|
address. Thus virt_to_bus/bus_to_virt are *everywhere*.
|
|
|
|
3) The implementation HP is using seems to be significantly pickier
|
|
about when and how the command and RX units are started. some
|
|
command ordering was changed.
|
|
|
|
Examination of the mach driver leads one to believe that there
|
|
might be a saner way to pull this off... anyone who feels like a
|
|
full rewrite can be my guest.
|
|
|
|
Split 02/13/2000 Sam Creasey (sammy@oh.verio.com)
|
|
|
|
02/01/2000 Initial modifications for parisc by Helge Deller (deller@gmx.de)
|
|
03/02/2000 changes for better/correct(?) cache-flushing (deller)
|
|
*/
|
|
|
|
/* 82596.c: A generic 82596 ethernet driver for linux. */
|
|
/*
|
|
Based on Apricot.c
|
|
Written 1994 by Mark Evans.
|
|
This driver is for the Apricot 82596 bus-master interface
|
|
|
|
Modularised 12/94 Mark Evans
|
|
|
|
|
|
Modified to support the 82596 ethernet chips on 680x0 VME boards.
|
|
by Richard Hirst <richard@sleepie.demon.co.uk>
|
|
Renamed to be 82596.c
|
|
|
|
980825: Changed to receive directly in to sk_buffs which are
|
|
allocated at open() time. Eliminates copy on incoming frames
|
|
(small ones are still copied). Shared data now held in a
|
|
non-cached page, so we can run on 68060 in copyback mode.
|
|
|
|
TBD:
|
|
* look at deferring rx frames rather than discarding (as per tulip)
|
|
* handle tx ring full as per tulip
|
|
* performace test to tune rx_copybreak
|
|
|
|
Most of my modifications relate to the braindead big-endian
|
|
implementation by Intel. When the i596 is operating in
|
|
'big-endian' mode, it thinks a 32 bit value of 0x12345678
|
|
should be stored as 0x56781234. This is a real pain, when
|
|
you have linked lists which are shared by the 680x0 and the
|
|
i596.
|
|
|
|
Driver skeleton
|
|
Written 1993 by Donald Becker.
|
|
Copyright 1993 United States Government as represented by the Director,
|
|
National Security Agency. This software may only be used and distributed
|
|
according to the terms of the GNU General Public License as modified by SRC,
|
|
incorporated herein by reference.
|
|
|
|
The author may be reached as becker@scyld.com, or C/O
|
|
Scyld Computing Corporation, 410 Severn Ave., Suite 210, Annapolis MD 21403
|
|
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/string.h>
|
|
#include <linux/ptrace.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/ioport.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/netdevice.h>
|
|
#include <linux/etherdevice.h>
|
|
#include <linux/skbuff.h>
|
|
#include <linux/init.h>
|
|
#include <linux/types.h>
|
|
#include <linux/bitops.h>
|
|
#include <linux/dma-mapping.h>
|
|
|
|
#include <asm/io.h>
|
|
#include <asm/irq.h>
|
|
#include <asm/pdc.h>
|
|
#include <asm/parisc-device.h>
|
|
|
|
#define LASI_82596_DRIVER_VERSION "LASI 82596 driver - Revision: 1.30"
|
|
|
|
#define PA_I82596_RESET 0 /* Offsets relative to LASI-LAN-Addr.*/
|
|
#define PA_CPU_PORT_L_ACCESS 4
|
|
#define PA_CHANNEL_ATTENTION 8
|
|
|
|
#define OPT_SWAP_PORT 0x0001 /* Need to wordswp on the MPU port */
|
|
|
|
#define DMA_ALLOC dma_alloc_noncoherent
|
|
#define DMA_FREE dma_free_noncoherent
|
|
#define DMA_WBACK(ndev, addr, len) \
|
|
do { dma_cache_sync((ndev)->dev.parent, (void *)addr, len, DMA_TO_DEVICE); } while (0)
|
|
|
|
#define DMA_INV(ndev, addr, len) \
|
|
do { dma_cache_sync((ndev)->dev.parent, (void *)addr, len, DMA_FROM_DEVICE); } while (0)
|
|
|
|
#define DMA_WBACK_INV(ndev, addr, len) \
|
|
do { dma_cache_sync((ndev)->dev.parent, (void *)addr, len, DMA_BIDIRECTIONAL); } while (0)
|
|
|
|
#define SYSBUS 0x0000006c;
|
|
|
|
/* big endian CPU, 82596 "big" endian mode */
|
|
#define SWAP32(x) (((u32)(x)<<16) | ((((u32)(x)))>>16))
|
|
#define SWAP16(x) (x)
|
|
|
|
#include "lib82596.c"
|
|
|
|
MODULE_AUTHOR("Richard Hirst");
|
|
MODULE_DESCRIPTION("i82596 driver");
|
|
MODULE_LICENSE("GPL");
|
|
module_param(i596_debug, int, 0);
|
|
MODULE_PARM_DESC(i596_debug, "lasi_82596 debug mask");
|
|
|
|
static inline void ca(struct net_device *dev)
|
|
{
|
|
gsc_writel(0, dev->base_addr + PA_CHANNEL_ATTENTION);
|
|
}
|
|
|
|
|
|
static void mpu_port(struct net_device *dev, int c, dma_addr_t x)
|
|
{
|
|
struct i596_private *lp = netdev_priv(dev);
|
|
|
|
u32 v = (u32) (c) | (u32) (x);
|
|
u16 a, b;
|
|
|
|
if (lp->options & OPT_SWAP_PORT) {
|
|
a = v >> 16;
|
|
b = v & 0xffff;
|
|
} else {
|
|
a = v & 0xffff;
|
|
b = v >> 16;
|
|
}
|
|
|
|
gsc_writel(a, dev->base_addr + PA_CPU_PORT_L_ACCESS);
|
|
udelay(1);
|
|
gsc_writel(b, dev->base_addr + PA_CPU_PORT_L_ACCESS);
|
|
}
|
|
|
|
#define LAN_PROM_ADDR 0xF0810000
|
|
|
|
static int __devinit
|
|
lan_init_chip(struct parisc_device *dev)
|
|
{
|
|
struct net_device *netdevice;
|
|
struct i596_private *lp;
|
|
int retval;
|
|
int i;
|
|
|
|
if (!dev->irq) {
|
|
printk(KERN_ERR "%s: IRQ not found for i82596 at 0x%lx\n",
|
|
__FILE__, dev->hpa.start);
|
|
return -ENODEV;
|
|
}
|
|
|
|
printk(KERN_INFO "Found i82596 at 0x%lx, IRQ %d\n", dev->hpa.start,
|
|
dev->irq);
|
|
|
|
netdevice = alloc_etherdev(sizeof(struct i596_private));
|
|
if (!netdevice)
|
|
return -ENOMEM;
|
|
SET_NETDEV_DEV(netdevice, &dev->dev);
|
|
parisc_set_drvdata (dev, netdevice);
|
|
|
|
netdevice->base_addr = dev->hpa.start;
|
|
netdevice->irq = dev->irq;
|
|
|
|
if (pdc_lan_station_id(netdevice->dev_addr, netdevice->base_addr)) {
|
|
for (i = 0; i < 6; i++) {
|
|
netdevice->dev_addr[i] = gsc_readb(LAN_PROM_ADDR + i);
|
|
}
|
|
printk(KERN_INFO
|
|
"%s: MAC of HP700 LAN read from EEPROM\n", __FILE__);
|
|
}
|
|
|
|
lp = netdev_priv(netdevice);
|
|
lp->options = dev->id.sversion == 0x72 ? OPT_SWAP_PORT : 0;
|
|
|
|
retval = i82596_probe(netdevice);
|
|
if (retval) {
|
|
free_netdev(netdevice);
|
|
return -ENODEV;
|
|
}
|
|
return retval;
|
|
}
|
|
|
|
static int __devexit lan_remove_chip (struct parisc_device *pdev)
|
|
{
|
|
struct net_device *dev = parisc_get_drvdata(pdev);
|
|
struct i596_private *lp = netdev_priv(dev);
|
|
|
|
unregister_netdev (dev);
|
|
DMA_FREE(&pdev->dev, sizeof(struct i596_private),
|
|
(void *)lp->dma, lp->dma_addr);
|
|
free_netdev (dev);
|
|
return 0;
|
|
}
|
|
|
|
static struct parisc_device_id lan_tbl[] = {
|
|
{ HPHW_FIO, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x0008a },
|
|
{ HPHW_FIO, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x00072 },
|
|
{ 0, }
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(parisc, lan_tbl);
|
|
|
|
static struct parisc_driver lan_driver = {
|
|
.name = "lasi_82596",
|
|
.id_table = lan_tbl,
|
|
.probe = lan_init_chip,
|
|
.remove = __devexit_p(lan_remove_chip),
|
|
};
|
|
|
|
static int __devinit lasi_82596_init(void)
|
|
{
|
|
printk(KERN_INFO LASI_82596_DRIVER_VERSION "\n");
|
|
return register_parisc_driver(&lan_driver);
|
|
}
|
|
|
|
module_init(lasi_82596_init);
|
|
|
|
static void __exit lasi_82596_exit(void)
|
|
{
|
|
unregister_parisc_driver(&lan_driver);
|
|
}
|
|
|
|
module_exit(lasi_82596_exit);
|