+++ /dev/null
-/* Intel Professional Workstation/panther ethernet driver */
-/* lp486e.c: A panther 82596 ethernet driver for linux. */
-/*
- History and copyrights:
-
- 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
-
- Apricot
- Written 1994 by Mark Evans.
- This driver is for the Apricot 82596 bus-master interface
-
- Modularised 12/94 Mark Evans
-
- Professional Workstation
- Derived from apricot.c by Ard van Breemen
- <ard@murphy.nl>|<ard@cstmel.hobby.nl>|<ard@cstmel.nl.eu.org>
-
- Credits:
- Thanks to Murphy Software BV for letting me write this in their time.
- Well, actually, I get paid doing this...
- (Also: see http://www.murphy.nl for murphy, and my homepage ~ard for
- more information on the Professional Workstation)
-
- Present version
- aeb@cwi.nl
-*/
-/*
- There are currently two motherboards that I know of in the
- professional workstation. The only one that I know is the
- intel panther motherboard. -- ard
-*/
-/*
-The pws is equipped with an intel 82596. This is a very intelligent controller
-which runs its own micro-code. Communication with the hostprocessor is done
-through linked lists of commands and buffers in the hostprocessors memory.
-A complete description of the 82596 is available from intel. Search for
-a file called "29021806.pdf". It is a complete description of the chip itself.
-To use it for the pws some additions are needed regarding generation of
-the PORT and CA signal, and the interrupt glue needed for a pc.
-I/O map:
-PORT SIZE ACTION MEANING
-0xCB0 2 WRITE Lower 16 bits for PORT command
-0xCB2 2 WRITE Upper 16 bits for PORT command, and issue of PORT command
-0xCB4 1 WRITE Generation of CA signal
-0xCB8 1 WRITE Clear interrupt glue
-All other communication is through memory!
-*/
-
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/delay.h>
-#include <linux/kernel.h>
-#include <linux/string.h>
-#include <linux/errno.h>
-#include <linux/ioport.h>
-#include <linux/slab.h>
-#include <linux/interrupt.h>
-#include <linux/netdevice.h>
-#include <linux/etherdevice.h>
-#include <linux/skbuff.h>
-#include <linux/bitops.h>
-
-#include <asm/io.h>
-#include <asm/dma.h>
-
-#define DRV_NAME "lp486e"
-
-/* debug print flags */
-#define LOG_SRCDST 0x80000000
-#define LOG_STATINT 0x40000000
-#define LOG_STARTINT 0x20000000
-
-#define i596_debug debug
-
-static int i596_debug = 0;
-
-static const char * const medianame[] = {
- "10baseT", "AUI",
- "10baseT-FD", "AUI-FD",
-};
-
-#define LP486E_TOTAL_SIZE 16
-
-#define I596_NULL (0xffffffff)
-
-#define CMD_EOL 0x8000 /* The last command of the list, stop. */
-#define CMD_SUSP 0x4000 /* Suspend after doing cmd. */
-#define CMD_INTR 0x2000 /* Interrupt after doing cmd. */
-
-#define CMD_FLEX 0x0008 /* Enable flexible memory model */
-
-enum commands {
- CmdNOP = 0,
- CmdIASetup = 1,
- CmdConfigure = 2,
- CmdMulticastList = 3,
- CmdTx = 4,
- CmdTDR = 5,
- CmdDump = 6,
- CmdDiagnose = 7
-};
-
-#if 0
-static const char *CUcmdnames[8] = { "NOP", "IASetup", "Configure", "MulticastList",
- "Tx", "TDR", "Dump", "Diagnose" };
-#endif
-
-/* Status word bits */
-#define STAT_CX 0x8000 /* The CU finished executing a command
- with the Interrupt bit set */
-#define STAT_FR 0x4000 /* The RU finished receiving a frame */
-#define STAT_CNA 0x2000 /* The CU left the active state */
-#define STAT_RNR 0x1000 /* The RU left the active state */
-#define STAT_ACK (STAT_CX | STAT_FR | STAT_CNA | STAT_RNR)
-#define STAT_CUS 0x0700 /* Status of CU: 0: idle, 1: suspended,
- 2: active, 3-7: unused */
-#define STAT_RUS 0x00f0 /* Status of RU: 0: idle, 1: suspended,
- 2: no resources, 4: ready,
- 10: no resources due to no more RBDs,
- 12: no more RBDs, other: unused */
-#define STAT_T 0x0008 /* Bus throttle timers loaded */
-#define STAT_ZERO 0x0807 /* Always zero */
-
-#if 0
-static char *CUstates[8] = {
- "idle", "suspended", "active", 0, 0, 0, 0, 0
-};
-static char *RUstates[16] = {
- "idle", "suspended", "no resources", 0, "ready", 0, 0, 0,
- 0, 0, "no RBDs", 0, "out of RBDs", 0, 0, 0
-};
-
-static void
-i596_out_status(int status) {
- int bad = 0;
- char *s;
-
- printk("status %4.4x:", status);
- if (status == 0xffff)
- printk(" strange..\n");
- else {
- if (status & STAT_CX)
- printk(" CU done");
- if (status & STAT_CNA)
- printk(" CU stopped");
- if (status & STAT_FR)
- printk(" got a frame");
- if (status & STAT_RNR)
- printk(" RU stopped");
- if (status & STAT_T)
- printk(" throttled");
- if (status & STAT_ZERO)
- bad = 1;
- s = CUstates[(status & STAT_CUS) >> 8];
- if (!s)
- bad = 1;
- else
- printk(" CU(%s)", s);
- s = RUstates[(status & STAT_RUS) >> 4];
- if (!s)
- bad = 1;
- else
- printk(" RU(%s)", s);
- if (bad)
- printk(" bad status");
- printk("\n");
- }
-}
-#endif
-
-/* Command word bits */
-#define ACK_CX 0x8000
-#define ACK_FR 0x4000
-#define ACK_CNA 0x2000
-#define ACK_RNR 0x1000
-
-#define CUC_START 0x0100
-#define CUC_RESUME 0x0200
-#define CUC_SUSPEND 0x0300
-#define CUC_ABORT 0x0400
-
-#define RX_START 0x0010
-#define RX_RESUME 0x0020
-#define RX_SUSPEND 0x0030
-#define RX_ABORT 0x0040
-
-typedef u32 phys_addr;
-
-static inline phys_addr
-va_to_pa(void *x) {
- return x ? virt_to_bus(x) : I596_NULL;
-}
-
-static inline void *
-pa_to_va(phys_addr x) {
- return (x == I596_NULL) ? NULL : bus_to_virt(x);
-}
-
-/* status bits for cmd */
-#define CMD_STAT_C 0x8000 /* CU command complete */
-#define CMD_STAT_B 0x4000 /* CU command in progress */
-#define CMD_STAT_OK 0x2000 /* CU command completed without errors */
-#define CMD_STAT_A 0x1000 /* CU command abnormally terminated */
-
-struct i596_cmd { /* 8 bytes */
- unsigned short status;
- unsigned short command;
- phys_addr pa_next; /* va_to_pa(struct i596_cmd *next) */
-};
-
-#define EOF 0x8000
-#define SIZE_MASK 0x3fff
-
-struct i596_tbd {
- unsigned short size;
- unsigned short pad;
- phys_addr pa_next; /* va_to_pa(struct i596_tbd *next) */
- phys_addr pa_data; /* va_to_pa(char *data) */
- struct sk_buff *skb;
-};
-
-struct tx_cmd {
- struct i596_cmd cmd;
- phys_addr pa_tbd; /* va_to_pa(struct i596_tbd *tbd) */
- unsigned short size;
- unsigned short pad;
-};
-
-/* status bits for rfd */
-#define RFD_STAT_C 0x8000 /* Frame reception complete */
-#define RFD_STAT_B 0x4000 /* Frame reception in progress */
-#define RFD_STAT_OK 0x2000 /* Frame received without errors */
-#define RFD_STATUS 0x1fff
-#define RFD_LENGTH_ERR 0x1000
-#define RFD_CRC_ERR 0x0800
-#define RFD_ALIGN_ERR 0x0400
-#define RFD_NOBUFS_ERR 0x0200
-#define RFD_DMA_ERR 0x0100 /* DMA overrun failure to acquire system bus */
-#define RFD_SHORT_FRAME_ERR 0x0080
-#define RFD_NOEOP_ERR 0x0040
-#define RFD_TRUNC_ERR 0x0020
-#define RFD_MULTICAST 0x0002 /* 0: destination had our address
- 1: destination was broadcast/multicast */
-#define RFD_COLLISION 0x0001
-
-/* receive frame descriptor */
-struct i596_rfd {
- unsigned short stat;
- unsigned short cmd;
- phys_addr pa_next; /* va_to_pa(struct i596_rfd *next) */
- phys_addr pa_rbd; /* va_to_pa(struct i596_rbd *rbd) */
- unsigned short count;
- unsigned short size;
- char data[1532];
-};
-
-#define RBD_EL 0x8000
-#define RBD_P 0x4000
-#define RBD_SIZEMASK 0x3fff
-#define RBD_EOF 0x8000
-#define RBD_F 0x4000
-
-/* receive buffer descriptor */
-struct i596_rbd {
- unsigned short size;
- unsigned short pad;
- phys_addr pa_next; /* va_to_pa(struct i596_tbd *next) */
- phys_addr pa_data; /* va_to_pa(char *data) */
- phys_addr pa_prev; /* va_to_pa(struct i596_tbd *prev) */
-
- /* Driver private part */
- struct sk_buff *skb;
-};
-
-#define RX_RING_SIZE 64
-#define RX_SKBSIZE (ETH_FRAME_LEN+10)
-#define RX_RBD_SIZE 32
-
-/* System Control Block - 40 bytes */
-struct i596_scb {
- u16 status; /* 0 */
- u16 command; /* 2 */
- phys_addr pa_cmd; /* 4 - va_to_pa(struct i596_cmd *cmd) */
- phys_addr pa_rfd; /* 8 - va_to_pa(struct i596_rfd *rfd) */
- u32 crc_err; /* 12 */
- u32 align_err; /* 16 */
- u32 resource_err; /* 20 */
- u32 over_err; /* 24 */
- u32 rcvdt_err; /* 28 */
- u32 short_err; /* 32 */
- u16 t_on; /* 36 */
- u16 t_off; /* 38 */
-};
-
-/* Intermediate System Configuration Pointer - 8 bytes */
-struct i596_iscp {
- u32 busy; /* 0 */
- phys_addr pa_scb; /* 4 - va_to_pa(struct i596_scb *scb) */
-};
-
-/* System Configuration Pointer - 12 bytes */
-struct i596_scp {
- u32 sysbus; /* 0 */
- u32 pad; /* 4 */
- phys_addr pa_iscp; /* 8 - va_to_pa(struct i596_iscp *iscp) */
-};
-
-/* Selftest and dump results - needs 16-byte alignment */
-/*
- * The size of the dump area is 304 bytes. When the dump is executed
- * by the Port command an extra word will be appended to the dump area.
- * The extra word is a copy of the Dump status word (containing the
- * C, B, OK bits). [I find 0xa006, with a0 for C+OK and 6 for dump]
- */
-struct i596_dump {
- u16 dump[153]; /* (304 = 130h) + 2 bytes */
-};
-
-struct i596_private { /* aligned to a 16-byte boundary */
- struct i596_scp scp; /* 0 - needs 16-byte alignment */
- struct i596_iscp iscp; /* 12 */
- struct i596_scb scb; /* 20 */
- u32 dummy; /* 60 */
- struct i596_dump dump; /* 64 - needs 16-byte alignment */
-
- struct i596_cmd set_add;
- char eth_addr[8]; /* directly follows set_add */
-
- struct i596_cmd set_conf;
- char i596_config[16]; /* directly follows set_conf */
-
- struct i596_cmd tdr;
- unsigned long tdr_stat; /* directly follows tdr */
-
- int last_restart;
- struct i596_rbd *rbd_list;
- struct i596_rbd *rbd_tail;
- struct i596_rfd *rx_tail;
- struct i596_cmd *cmd_tail;
- struct i596_cmd *cmd_head;
- int cmd_backlog;
- unsigned long last_cmd;
- spinlock_t cmd_lock;
-};
-
-static char init_setup[14] = {
- 0x8E, /* length 14 bytes, prefetch on */
- 0xC8, /* default: fifo to 8, monitor off */
- 0x40, /* default: don't save bad frames (apricot.c had 0x80) */
- 0x2E, /* (default is 0x26)
- No source address insertion, 8 byte preamble */
- 0x00, /* default priority and backoff */
- 0x60, /* default interframe spacing */
- 0x00, /* default slot time LSB */
- 0xf2, /* default slot time and nr of retries */
- 0x00, /* default various bits
- (0: promiscuous mode, 1: broadcast disable,
- 2: encoding mode, 3: transmit on no CRS,
- 4: no CRC insertion, 5: CRC type,
- 6: bit stuffing, 7: padding) */
- 0x00, /* default carrier sense and collision detect */
- 0x40, /* default minimum frame length */
- 0xff, /* (default is 0xff, and that is what apricot.c has;
- elp486.c has 0xfb: Enable crc append in memory.) */
- 0x00, /* default: not full duplex */
- 0x7f /* (default is 0x3f) multi IA */
-};
-
-static int i596_open(struct net_device *dev);
-static netdev_tx_t i596_start_xmit(struct sk_buff *skb, struct net_device *dev);
-static irqreturn_t i596_interrupt(int irq, void *dev_id);
-static int i596_close(struct net_device *dev);
-static void i596_add_cmd(struct net_device *dev, struct i596_cmd *cmd);
-static void print_eth(char *);
-static void set_multicast_list(struct net_device *dev);
-static void i596_tx_timeout(struct net_device *dev);
-
-static int
-i596_timeout(struct net_device *dev, char *msg, int ct) {
- struct i596_private *lp;
- int boguscnt = ct;
-
- lp = netdev_priv(dev);
- while (lp->scb.command) {
- if (--boguscnt == 0) {
- printk("%s: %s timed out - stat %4.4x, cmd %4.4x\n",
- dev->name, msg,
- lp->scb.status, lp->scb.command);
- return 1;
- }
- udelay(5);
- barrier();
- }
- return 0;
-}
-
-static inline int
-init_rx_bufs(struct net_device *dev, int num) {
- struct i596_private *lp;
- struct i596_rfd *rfd;
- int i;
- // struct i596_rbd *rbd;
-
- lp = netdev_priv(dev);
- lp->scb.pa_rfd = I596_NULL;
-
- for (i = 0; i < num; i++) {
- rfd = kmalloc(sizeof(struct i596_rfd), GFP_KERNEL);
- if (rfd == NULL)
- break;
-
- rfd->stat = 0;
- rfd->pa_rbd = I596_NULL;
- rfd->count = 0;
- rfd->size = 1532;
- if (i == 0) {
- rfd->cmd = CMD_EOL;
- lp->rx_tail = rfd;
- } else {
- rfd->cmd = 0;
- }
- rfd->pa_next = lp->scb.pa_rfd;
- lp->scb.pa_rfd = va_to_pa(rfd);
- lp->rx_tail->pa_next = lp->scb.pa_rfd;
- }
-
-#if 0
- for (i = 0; i<RX_RBD_SIZE; i++) {
- rbd = kmalloc(sizeof(struct i596_rbd), GFP_KERNEL);
- if (rbd) {
- rbd->pad = 0;
- rbd->count = 0;
- rbd->skb = dev_alloc_skb(RX_SKBSIZE);
- if (!rbd->skb) {
- printk("dev_alloc_skb failed");
- }
- rbd->next = rfd->rbd;
- if (i) {
- rfd->rbd->prev = rbd;
- rbd->size = RX_SKBSIZE;
- } else {
- rbd->size = (RX_SKBSIZE | RBD_EL);
- lp->rbd_tail = rbd;
- }
-
- rfd->rbd = rbd;
- }
- }
- lp->rbd_tail->next = rfd->rbd;
-#endif
- return i;
-}
-
-static inline void
-remove_rx_bufs(struct net_device *dev) {
- struct i596_private *lp;
- struct i596_rfd *rfd;
-
- lp = netdev_priv(dev);
- lp->rx_tail->pa_next = I596_NULL;
-
- do {
- rfd = pa_to_va(lp->scb.pa_rfd);
- lp->scb.pa_rfd = rfd->pa_next;
- kfree(rfd);
- } while (rfd != lp->rx_tail);
-
- lp->rx_tail = NULL;
-
-#if 0
- for (lp->rbd_list) {
- }
-#endif
-}
-
-#define PORT_RESET 0x00 /* reset 82596 */
-#define PORT_SELFTEST 0x01 /* selftest */
-#define PORT_ALTSCP 0x02 /* alternate SCB address */
-#define PORT_DUMP 0x03 /* dump */
-
-#define IOADDR 0xcb0 /* real constant */
-#define IRQ 10 /* default IRQ - can be changed by ECU */
-
-/* The 82596 requires two 16-bit write cycles for a port command */
-static inline void
-PORT(phys_addr a, unsigned int cmd) {
- if (a & 0xf)
- printk("lp486e.c: PORT: address not aligned\n");
- outw(((a & 0xffff) | cmd), IOADDR);
- outw(((a>>16) & 0xffff), IOADDR+2);
-}
-
-static inline void
-CA(void) {
- outb(0, IOADDR+4);
- udelay(8);
-}
-
-static inline void
-CLEAR_INT(void) {
- outb(0, IOADDR+8);
-}
-
-#if 0
-/* selftest or dump */
-static void
-i596_port_do(struct net_device *dev, int portcmd, char *cmdname) {
- struct i596_private *lp = netdev_priv(dev);
- u16 *outp;
- int i, m;
-
- memset((void *)&(lp->dump), 0, sizeof(struct i596_dump));
- outp = &(lp->dump.dump[0]);
-
- PORT(va_to_pa(outp), portcmd);
- mdelay(30); /* random, unmotivated */
-
- printk("lp486e i82596 %s result:\n", cmdname);
- for (m = ARRAY_SIZE(lp->dump.dump); m && lp->dump.dump[m-1] == 0; m--)
- ;
- for (i = 0; i < m; i++) {
- printk(" %04x", lp->dump.dump[i]);
- if (i%8 == 7)
- printk("\n");
- }
- printk("\n");
-}
-#endif
-
-static int
-i596_scp_setup(struct net_device *dev) {
- struct i596_private *lp = netdev_priv(dev);
- int boguscnt;
-
- /* Setup SCP, ISCP, SCB */
- /*
- * sysbus bits:
- * only a single byte is significant - here 0x44
- * 0x80: big endian mode (details depend on stepping)
- * 0x40: 1
- * 0x20: interrupt pin is active low
- * 0x10: lock function disabled
- * 0x08: external triggering of bus throttle timers
- * 0x06: 00: 82586 compat mode, 01: segmented mode, 10: linear mode
- * 0x01: unused
- */
- lp->scp.sysbus = 0x00440000; /* linear mode */
- lp->scp.pad = 0; /* must be zero */
- lp->scp.pa_iscp = va_to_pa(&(lp->iscp));
-
- /*
- * The CPU sets the ISCP to 1 before it gives the first CA()
- */
- lp->iscp.busy = 0x0001;
- lp->iscp.pa_scb = va_to_pa(&(lp->scb));
-
- lp->scb.command = 0;
- lp->scb.status = 0;
- lp->scb.pa_cmd = I596_NULL;
- /* lp->scb.pa_rfd has been initialised already */
-
- lp->last_cmd = jiffies;
- lp->cmd_backlog = 0;
- lp->cmd_head = NULL;
-
- /*
- * Reset the 82596.
- * We need to wait 10 systemclock cycles, and
- * 5 serial clock cycles.
- */
- PORT(0, PORT_RESET); /* address part ignored */
- udelay(100);
-
- /*
- * Before the CA signal is asserted, the default SCP address
- * (0x00fffff4) can be changed to a 16-byte aligned value
- */
- PORT(va_to_pa(&lp->scp), PORT_ALTSCP); /* change the scp address */
-
- /*
- * The initialization procedure begins when a
- * Channel Attention signal is asserted after a reset.
- */
-
- CA();
-
- /*
- * The ISCP busy is cleared by the 82596 after the SCB address is read.
- */
- boguscnt = 100;
- while (lp->iscp.busy) {
- if (--boguscnt == 0) {
- /* No i82596 present? */
- printk("%s: i82596 initialization timed out\n",
- dev->name);
- return 1;
- }
- udelay(5);
- barrier();
- }
- /* I find here boguscnt==100, so no delay was required. */
-
- return 0;
-}
-
-static int
-init_i596(struct net_device *dev) {
- struct i596_private *lp;
-
- if (i596_scp_setup(dev))
- return 1;
-
- lp = netdev_priv(dev);
- lp->scb.command = 0;
-
- memcpy ((void *)lp->i596_config, init_setup, 14);
- lp->set_conf.command = CmdConfigure;
- i596_add_cmd(dev, (void *)&lp->set_conf);
-
- memcpy ((void *)lp->eth_addr, dev->dev_addr, 6);
- lp->set_add.command = CmdIASetup;
- i596_add_cmd(dev, &lp->set_add);
-
- lp->tdr.command = CmdTDR;
- i596_add_cmd(dev, &lp->tdr);
-
- if (lp->scb.command && i596_timeout(dev, "i82596 init", 200))
- return 1;
-
- lp->scb.command = RX_START;
- CA();
-
- barrier();
-
- if (lp->scb.command && i596_timeout(dev, "Receive Unit start", 100))
- return 1;
-
- return 0;
-}
-
-/* Receive a single frame */
-static inline int
-i596_rx_one(struct net_device *dev, struct i596_private *lp,
- struct i596_rfd *rfd, int *frames) {
-
- if (rfd->stat & RFD_STAT_OK) {
- /* a good frame */
- int pkt_len = (rfd->count & 0x3fff);
- struct sk_buff *skb = netdev_alloc_skb(dev, pkt_len);
-
- (*frames)++;
-
- if (rfd->cmd & CMD_EOL)
- printk("Received on EOL\n");
-
- if (skb == NULL) {
- printk ("%s: i596_rx Memory squeeze, "
- "dropping packet.\n", dev->name);
- dev->stats.rx_dropped++;
- return 1;
- }
-
- memcpy(skb_put(skb,pkt_len), rfd->data, pkt_len);
-
- skb->protocol = eth_type_trans(skb,dev);
- netif_rx(skb);
- dev->stats.rx_packets++;
- } else {
-#if 0
- printk("Frame reception error status %04x\n",
- rfd->stat);
-#endif
- dev->stats.rx_errors++;
- if (rfd->stat & RFD_COLLISION)
- dev->stats.collisions++;
- if (rfd->stat & RFD_SHORT_FRAME_ERR)
- dev->stats.rx_length_errors++;
- if (rfd->stat & RFD_DMA_ERR)
- dev->stats.rx_over_errors++;
- if (rfd->stat & RFD_NOBUFS_ERR)
- dev->stats.rx_fifo_errors++;
- if (rfd->stat & RFD_ALIGN_ERR)
- dev->stats.rx_frame_errors++;
- if (rfd->stat & RFD_CRC_ERR)
- dev->stats.rx_crc_errors++;
- if (rfd->stat & RFD_LENGTH_ERR)
- dev->stats.rx_length_errors++;
- }
- rfd->stat = rfd->count = 0;
- return 0;
-}
-
-static int
-i596_rx(struct net_device *dev) {
- struct i596_private *lp = netdev_priv(dev);
- struct i596_rfd *rfd;
- int frames = 0;
-
- while (1) {
- rfd = pa_to_va(lp->scb.pa_rfd);
- if (!rfd) {
- printk(KERN_ERR "i596_rx: NULL rfd?\n");
- return 0;
- }
-#if 1
- if (rfd->stat && !(rfd->stat & (RFD_STAT_C | RFD_STAT_B)))
- printk("SF:%p-%04x\n", rfd, rfd->stat);
-#endif
- if (!(rfd->stat & RFD_STAT_C))
- break; /* next one not ready */
- if (i596_rx_one(dev, lp, rfd, &frames))
- break; /* out of memory */
- rfd->cmd = CMD_EOL;
- lp->rx_tail->cmd = 0;
- lp->rx_tail = rfd;
- lp->scb.pa_rfd = rfd->pa_next;
- barrier();
- }
-
- return frames;
-}
-
-static void
-i596_cleanup_cmd(struct net_device *dev) {
- struct i596_private *lp;
- struct i596_cmd *cmd;
-
- lp = netdev_priv(dev);
- while (lp->cmd_head) {
- cmd = lp->cmd_head;
-
- lp->cmd_head = pa_to_va(lp->cmd_head->pa_next);
- lp->cmd_backlog--;
-
- switch ((cmd->command) & 0x7) {
- case CmdTx: {
- struct tx_cmd *tx_cmd = (struct tx_cmd *) cmd;
- struct i596_tbd * tx_cmd_tbd;
- tx_cmd_tbd = pa_to_va(tx_cmd->pa_tbd);
-
- dev_kfree_skb_any(tx_cmd_tbd->skb);
-
- dev->stats.tx_errors++;
- dev->stats.tx_aborted_errors++;
-
- cmd->pa_next = I596_NULL;
- kfree((unsigned char *)tx_cmd);
- netif_wake_queue(dev);
- break;
- }
- case CmdMulticastList: {
- // unsigned short count = *((unsigned short *) (ptr + 1));
-
- cmd->pa_next = I596_NULL;
- kfree((unsigned char *)cmd);
- break;
- }
- default: {
- cmd->pa_next = I596_NULL;
- break;
- }
- }
- barrier();
- }
-
- if (lp->scb.command && i596_timeout(dev, "i596_cleanup_cmd", 100))
- ;
-
- lp->scb.pa_cmd = va_to_pa(lp->cmd_head);
-}
-
-static void i596_reset(struct net_device *dev, struct i596_private *lp, int ioaddr) {
-
- if (lp->scb.command && i596_timeout(dev, "i596_reset", 100))
- ;
-
- netif_stop_queue(dev);
-
- lp->scb.command = CUC_ABORT | RX_ABORT;
- CA();
- barrier();
-
- /* wait for shutdown */
- if (lp->scb.command && i596_timeout(dev, "i596_reset(2)", 400))
- ;
-
- i596_cleanup_cmd(dev);
- i596_rx(dev);
-
- netif_start_queue(dev);
- /*dev_kfree_skb(skb, FREE_WRITE);*/
- init_i596(dev);
-}
-
-static void i596_add_cmd(struct net_device *dev, struct i596_cmd *cmd) {
- struct i596_private *lp = netdev_priv(dev);
- int ioaddr = dev->base_addr;
- unsigned long flags;
-
- cmd->status = 0;
- cmd->command |= (CMD_EOL | CMD_INTR);
- cmd->pa_next = I596_NULL;
-
- spin_lock_irqsave(&lp->cmd_lock, flags);
-
- if (lp->cmd_head) {
- lp->cmd_tail->pa_next = va_to_pa(cmd);
- } else {
- lp->cmd_head = cmd;
- if (lp->scb.command && i596_timeout(dev, "i596_add_cmd", 100))
- ;
- lp->scb.pa_cmd = va_to_pa(cmd);
- lp->scb.command = CUC_START;
- CA();
- }
- lp->cmd_tail = cmd;
- lp->cmd_backlog++;
-
- lp->cmd_head = pa_to_va(lp->scb.pa_cmd);
- spin_unlock_irqrestore(&lp->cmd_lock, flags);
-
- if (lp->cmd_backlog > 16) {
- int tickssofar = jiffies - lp->last_cmd;
- if (tickssofar < HZ/4)
- return;
-
- printk(KERN_WARNING "%s: command unit timed out, status resetting.\n", dev->name);
- i596_reset(dev, lp, ioaddr);
- }
-}
-
-static int i596_open(struct net_device *dev)
-{
- int i;
-
- i = request_irq(dev->irq, i596_interrupt, IRQF_SHARED, dev->name, dev);
- if (i) {
- printk(KERN_ERR "%s: IRQ %d not free\n", dev->name, dev->irq);
- return i;
- }
-
- if ((i = init_rx_bufs(dev, RX_RING_SIZE)) < RX_RING_SIZE)
- printk(KERN_ERR "%s: only able to allocate %d receive buffers\n", dev->name, i);
-
- if (i < 4) {
- free_irq(dev->irq, dev);
- return -EAGAIN;
- }
- netif_start_queue(dev);
- init_i596(dev);
- return 0; /* Always succeed */
-}
-
-static netdev_tx_t i596_start_xmit (struct sk_buff *skb, struct net_device *dev) {
- struct tx_cmd *tx_cmd;
- short length;
-
- length = skb->len;
-
- if (length < ETH_ZLEN) {
- if (skb_padto(skb, ETH_ZLEN))
- return NETDEV_TX_OK;
- length = ETH_ZLEN;
- }
-
- tx_cmd = kmalloc((sizeof (struct tx_cmd) + sizeof (struct i596_tbd)), GFP_ATOMIC);
- if (tx_cmd == NULL) {
- printk(KERN_WARNING "%s: i596_xmit Memory squeeze, dropping packet.\n", dev->name);
- dev->stats.tx_dropped++;
- dev_kfree_skb (skb);
- } else {
- struct i596_tbd *tx_cmd_tbd;
- tx_cmd_tbd = (struct i596_tbd *) (tx_cmd + 1);
- tx_cmd->pa_tbd = va_to_pa (tx_cmd_tbd);
- tx_cmd_tbd->pa_next = I596_NULL;
-
- tx_cmd->cmd.command = (CMD_FLEX | CmdTx);
-
- tx_cmd->pad = 0;
- tx_cmd->size = 0;
- tx_cmd_tbd->pad = 0;
- tx_cmd_tbd->size = (EOF | length);
-
- tx_cmd_tbd->pa_data = va_to_pa (skb->data);
- tx_cmd_tbd->skb = skb;
-
- if (i596_debug & LOG_SRCDST)
- print_eth (skb->data);
-
- i596_add_cmd (dev, (struct i596_cmd *) tx_cmd);
-
- dev->stats.tx_packets++;
- }
-
- return NETDEV_TX_OK;
-}
-
-static void
-i596_tx_timeout (struct net_device *dev) {
- struct i596_private *lp = netdev_priv(dev);
- int ioaddr = dev->base_addr;
-
- /* Transmitter timeout, serious problems. */
- printk(KERN_WARNING "%s: transmit timed out, status resetting.\n", dev->name);
- dev->stats.tx_errors++;
-
- /* Try to restart the adaptor */
- if (lp->last_restart == dev->stats.tx_packets) {
- printk ("Resetting board.\n");
-
- /* Shutdown and restart */
- i596_reset (dev, lp, ioaddr);
- } else {
- /* Issue a channel attention signal */
- printk ("Kicking board.\n");
- lp->scb.command = (CUC_START | RX_START);
- CA();
- lp->last_restart = dev->stats.tx_packets;
- }
- netif_wake_queue(dev);
-}
-
-static void print_eth(char *add)
-{
- int i;
-
- printk ("Dest ");
- for (i = 0; i < 6; i++)
- printk(" %2.2X", (unsigned char) add[i]);
- printk ("\n");
-
- printk ("Source");
- for (i = 0; i < 6; i++)
- printk(" %2.2X", (unsigned char) add[i+6]);
- printk ("\n");
-
- printk ("type %2.2X%2.2X\n",
- (unsigned char) add[12], (unsigned char) add[13]);
-}
-
-static const struct net_device_ops i596_netdev_ops = {
- .ndo_open = i596_open,
- .ndo_stop = i596_close,
- .ndo_start_xmit = i596_start_xmit,
- .ndo_set_rx_mode = set_multicast_list,
- .ndo_tx_timeout = i596_tx_timeout,
- .ndo_change_mtu = eth_change_mtu,
- .ndo_set_mac_address = eth_mac_addr,
- .ndo_validate_addr = eth_validate_addr,
-};
-
-static int __init lp486e_probe(struct net_device *dev) {
- struct i596_private *lp;
- unsigned char eth_addr[6] = { 0, 0xaa, 0, 0, 0, 0 };
- unsigned char *bios;
- int i, j;
- int ret = -ENOMEM;
- static int probed;
-
- if (probed)
- return -ENODEV;
- probed++;
-
- if (!request_region(IOADDR, LP486E_TOTAL_SIZE, DRV_NAME)) {
- printk(KERN_ERR "lp486e: IO address 0x%x in use\n", IOADDR);
- return -EBUSY;
- }
-
- lp = netdev_priv(dev);
- spin_lock_init(&lp->cmd_lock);
-
- /*
- * Do we really have this thing?
- */
- if (i596_scp_setup(dev)) {
- ret = -ENODEV;
- goto err_out_kfree;
- }
-
- dev->base_addr = IOADDR;
- dev->irq = IRQ;
-
-
- /*
- * How do we find the ethernet address? I don't know.
- * One possibility is to look at the EISA configuration area
- * [0xe8000-0xe9fff]. This contains the ethernet address
- * but not at a fixed address - things depend on setup options.
- *
- * If we find no address, or the wrong address, use
- * ifconfig eth0 hw ether a1:a2:a3:a4:a5:a6
- * with the value found in the BIOS setup.
- */
- bios = bus_to_virt(0xe8000);
- for (j = 0; j < 0x2000; j++) {
- if (bios[j] == 0 && bios[j+1] == 0xaa && bios[j+2] == 0) {
- printk("%s: maybe address at BIOS 0x%x:",
- dev->name, 0xe8000+j);
- for (i = 0; i < 6; i++) {
- eth_addr[i] = bios[i+j];
- printk(" %2.2X", eth_addr[i]);
- }
- printk("\n");
- }
- }
-
- printk("%s: lp486e 82596 at %#3lx, IRQ %d,",
- dev->name, dev->base_addr, dev->irq);
- for (i = 0; i < 6; i++)
- printk(" %2.2X", dev->dev_addr[i] = eth_addr[i]);
- printk("\n");
-
- /* The LP486E-specific entries in the device structure. */
- dev->netdev_ops = &i596_netdev_ops;
- dev->watchdog_timeo = 5*HZ;
-
-#if 0
- /* selftest reports 0x320925ae - don't know what that means */
- i596_port_do(dev, PORT_SELFTEST, "selftest");
- i596_port_do(dev, PORT_DUMP, "dump");
-#endif
- return 0;
-
-err_out_kfree:
- release_region(IOADDR, LP486E_TOTAL_SIZE);
- return ret;
-}
-
-static inline void
-i596_handle_CU_completion(struct net_device *dev,
- struct i596_private *lp,
- unsigned short status,
- unsigned short *ack_cmdp) {
- struct i596_cmd *cmd;
- int frames_out = 0;
- int commands_done = 0;
- int cmd_val;
- unsigned long flags;
-
- spin_lock_irqsave(&lp->cmd_lock, flags);
- cmd = lp->cmd_head;
-
- while (lp->cmd_head && (lp->cmd_head->status & CMD_STAT_C)) {
- cmd = lp->cmd_head;
-
- lp->cmd_head = pa_to_va(lp->cmd_head->pa_next);
- lp->cmd_backlog--;
-
- commands_done++;
- cmd_val = cmd->command & 0x7;
-#if 0
- printk("finished CU %s command (%d)\n",
- CUcmdnames[cmd_val], cmd_val);
-#endif
- switch (cmd_val) {
- case CmdTx:
- {
- struct tx_cmd *tx_cmd;
- struct i596_tbd *tx_cmd_tbd;
-
- tx_cmd = (struct tx_cmd *) cmd;
- tx_cmd_tbd = pa_to_va(tx_cmd->pa_tbd);
-
- frames_out++;
- if (cmd->status & CMD_STAT_OK) {
- if (i596_debug)
- print_eth(pa_to_va(tx_cmd_tbd->pa_data));
- } else {
- dev->stats.tx_errors++;
- if (i596_debug)
- printk("transmission failure:%04x\n",
- cmd->status);
- if (cmd->status & 0x0020)
- dev->stats.collisions++;
- if (!(cmd->status & 0x0040))
- dev->stats.tx_heartbeat_errors++;
- if (cmd->status & 0x0400)
- dev->stats.tx_carrier_errors++;
- if (cmd->status & 0x0800)
- dev->stats.collisions++;
- if (cmd->status & 0x1000)
- dev->stats.tx_aborted_errors++;
- }
- dev_kfree_skb_irq(tx_cmd_tbd->skb);
-
- cmd->pa_next = I596_NULL;
- kfree((unsigned char *)tx_cmd);
- netif_wake_queue(dev);
- break;
- }
-
- case CmdMulticastList:
- cmd->pa_next = I596_NULL;
- kfree((unsigned char *)cmd);
- break;
-
- case CmdTDR:
- {
- unsigned long status = *((unsigned long *) (cmd + 1));
- if (status & 0x8000) {
- if (i596_debug)
- printk("%s: link ok.\n", dev->name);
- } else {
- if (status & 0x4000)
- printk("%s: Transceiver problem.\n",
- dev->name);
- if (status & 0x2000)
- printk("%s: Termination problem.\n",
- dev->name);
- if (status & 0x1000)
- printk("%s: Short circuit.\n",
- dev->name);
- printk("%s: Time %ld.\n",
- dev->name, status & 0x07ff);
- }
- }
- default:
- cmd->pa_next = I596_NULL;
- lp->last_cmd = jiffies;
-
- }
- barrier();
- }
-
- cmd = lp->cmd_head;
- while (cmd && (cmd != lp->cmd_tail)) {
- cmd->command &= 0x1fff;
- cmd = pa_to_va(cmd->pa_next);
- barrier();
- }
-
- if (lp->cmd_head)
- *ack_cmdp |= CUC_START;
- lp->scb.pa_cmd = va_to_pa(lp->cmd_head);
- spin_unlock_irqrestore(&lp->cmd_lock, flags);
-}
-
-static irqreturn_t
-i596_interrupt(int irq, void *dev_instance)
-{
- struct net_device *dev = dev_instance;
- struct i596_private *lp = netdev_priv(dev);
- unsigned short status, ack_cmd = 0;
- int frames_in = 0;
-
- /*
- * The 82596 examines the command, performs the required action,
- * and then clears the SCB command word.
- */
- if (lp->scb.command && i596_timeout(dev, "interrupt", 40))
- ;
-
- /*
- * The status word indicates the status of the 82596.
- * It is modified only by the 82596.
- *
- * [So, we must not clear it. I find often status 0xffff,
- * which is not one of the values allowed by the docs.]
- */
- status = lp->scb.status;
-#if 0
- if (i596_debug) {
- printk("%s: i596 interrupt, ", dev->name);
- i596_out_status(status);
- }
-#endif
- /* Impossible, but it happens - perhaps when we get
- a receive interrupt but scb.pa_rfd is I596_NULL. */
- if (status == 0xffff) {
- printk("%s: i596_interrupt: got status 0xffff\n", dev->name);
- goto out;
- }
-
- ack_cmd = (status & STAT_ACK);
-
- if (status & (STAT_CX | STAT_CNA))
- i596_handle_CU_completion(dev, lp, status, &ack_cmd);
-
- if (status & (STAT_FR | STAT_RNR)) {
- /* Restart the receive unit when it got inactive somehow */
- if ((status & STAT_RNR) && netif_running(dev))
- ack_cmd |= RX_START;
-
- if (status & STAT_FR) {
- frames_in = i596_rx(dev);
- if (!frames_in)
- printk("receive frame reported, but no frames\n");
- }
- }
-
- /* acknowledge the interrupt */
- /*
- if ((lp->scb.pa_cmd != I596_NULL) && netif_running(dev))
- ack_cmd |= CUC_START;
- */
-
- if (lp->scb.command && i596_timeout(dev, "i596 interrupt", 100))
- ;
-
- lp->scb.command = ack_cmd;
-
- CLEAR_INT();
- CA();
-
- out:
- return IRQ_HANDLED;
-}
-
-static int i596_close(struct net_device *dev) {
- struct i596_private *lp = netdev_priv(dev);
-
- netif_stop_queue(dev);
-
- if (i596_debug)
- printk("%s: Shutting down ethercard, status was %4.4x.\n",
- dev->name, lp->scb.status);
-
- lp->scb.command = (CUC_ABORT | RX_ABORT);
- CA();
-
- i596_cleanup_cmd(dev);
-
- if (lp->scb.command && i596_timeout(dev, "i596_close", 200))
- ;
-
- free_irq(dev->irq, dev);
- remove_rx_bufs(dev);
-
- return 0;
-}
-
-/*
-* Set or clear the multicast filter for this adaptor.
-*/
-
-static void set_multicast_list(struct net_device *dev) {
- struct i596_private *lp = netdev_priv(dev);
- struct i596_cmd *cmd;
-
- if (i596_debug > 1)
- printk ("%s: set multicast list %d\n",
- dev->name, netdev_mc_count(dev));
-
- if (!netdev_mc_empty(dev)) {
- struct netdev_hw_addr *ha;
- char *cp;
- cmd = kmalloc(sizeof(struct i596_cmd) + 2 +
- netdev_mc_count(dev) * 6, GFP_ATOMIC);
- if (cmd == NULL) {
- printk (KERN_ERR "%s: set_multicast Memory squeeze.\n", dev->name);
- return;
- }
- cmd->command = CmdMulticastList;
- *((unsigned short *) (cmd + 1)) = netdev_mc_count(dev) * 6;
- cp = ((char *)(cmd + 1))+2;
- netdev_for_each_mc_addr(ha, dev) {
- memcpy(cp, ha->addr, 6);
- cp += 6;
- }
- if (i596_debug & LOG_SRCDST)
- print_eth (((char *)(cmd + 1)) + 2);
- i596_add_cmd(dev, cmd);
- } else {
- if (lp->set_conf.pa_next != I596_NULL) {
- return;
- }
- if (netdev_mc_empty(dev) &&
- !(dev->flags & (IFF_PROMISC | IFF_ALLMULTI))) {
- lp->i596_config[8] &= ~0x01;
- } else {
- lp->i596_config[8] |= 0x01;
- }
-
- i596_add_cmd(dev, &lp->set_conf);
- }
-}
-
-MODULE_AUTHOR("Ard van Breemen <ard@cstmel.nl.eu.org>");
-MODULE_DESCRIPTION("Intel Panther onboard i82596 driver");
-MODULE_LICENSE("GPL");
-
-static struct net_device *dev_lp486e;
-static int full_duplex;
-static int options;
-static int io = IOADDR;
-static int irq = IRQ;
-
-module_param(debug, int, 0);
-//module_param(max_interrupt_work, int, 0);
-//module_param(reverse_probe, int, 0);
-//module_param(rx_copybreak, int, 0);
-module_param(options, int, 0);
-module_param(full_duplex, int, 0);
-
-static int __init lp486e_init_module(void) {
- int err;
- struct net_device *dev = alloc_etherdev(sizeof(struct i596_private));
- if (!dev)
- return -ENOMEM;
-
- dev->irq = irq;
- dev->base_addr = io;
- err = lp486e_probe(dev);
- if (err) {
- free_netdev(dev);
- return err;
- }
- err = register_netdev(dev);
- if (err) {
- release_region(dev->base_addr, LP486E_TOTAL_SIZE);
- free_netdev(dev);
- return err;
- }
- dev_lp486e = dev;
- full_duplex = 0;
- options = 0;
- return 0;
-}
-
-static void __exit lp486e_cleanup_module(void) {
- unregister_netdev(dev_lp486e);
- release_region(dev_lp486e->base_addr, LP486E_TOTAL_SIZE);
- free_netdev(dev_lp486e);
-}
-
-module_init(lp486e_init_module);
-module_exit(lp486e_cleanup_module);
projects / platform / kernel / linux-stable.git / commitdiff