diff options
Diffstat (limited to 'drivers/net/lasi_82596.c')
| -rw-r--r-- | drivers/net/lasi_82596.c | 1607 |
1 files changed, 1607 insertions, 0 deletions
diff --git a/drivers/net/lasi_82596.c b/drivers/net/lasi_82596.c new file mode 100644 index 000000000000..5e263fcba669 --- /dev/null +++ b/drivers/net/lasi_82596.c @@ -0,0 +1,1607 @@ +/* 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/pci.h> +#include <linux/types.h> +#include <linux/bitops.h> + +#include <asm/io.h> +#include <asm/pgtable.h> +#include <asm/irq.h> +#include <asm/pdc.h> +#include <asm/cache.h> +#include <asm/parisc-device.h> + +#define LASI_82596_DRIVER_VERSION "LASI 82596 driver - Revision: 1.30" + +/* DEBUG flags + */ + +#define DEB_INIT 0x0001 +#define DEB_PROBE 0x0002 +#define DEB_SERIOUS 0x0004 +#define DEB_ERRORS 0x0008 +#define DEB_MULTI 0x0010 +#define DEB_TDR 0x0020 +#define DEB_OPEN 0x0040 +#define DEB_RESET 0x0080 +#define DEB_ADDCMD 0x0100 +#define DEB_STATUS 0x0200 +#define DEB_STARTTX 0x0400 +#define DEB_RXADDR 0x0800 +#define DEB_TXADDR 0x1000 +#define DEB_RXFRAME 0x2000 +#define DEB_INTS 0x4000 +#define DEB_STRUCT 0x8000 +#define DEB_ANY 0xffff + + +#define DEB(x,y) if (i596_debug & (x)) { y; } + + +#define CHECK_WBACK(addr,len) \ + do { dma_cache_sync((void *)addr, len, DMA_TO_DEVICE); } while (0) + +#define CHECK_INV(addr,len) \ + do { dma_cache_sync((void *)addr, len, DMA_FROM_DEVICE); } while(0) + +#define CHECK_WBACK_INV(addr,len) \ + do { dma_cache_sync((void *)addr, len, DMA_BIDIRECTIONAL); } while (0) + + +#define PA_I82596_RESET 0 /* Offsets relative to LASI-LAN-Addr.*/ +#define PA_CPU_PORT_L_ACCESS 4 +#define PA_CHANNEL_ATTENTION 8 + + +/* + * Define various macros for Channel Attention, word swapping etc., dependent + * on architecture. MVME and BVME are 680x0 based, otherwise it is Intel. + */ + +#ifdef __BIG_ENDIAN +#define WSWAPrfd(x) (((u32)(x)<<16) | ((((u32)(x)))>>16)) +#define WSWAPrbd(x) (((u32)(x)<<16) | ((((u32)(x)))>>16)) +#define WSWAPiscp(x) (((u32)(x)<<16) | ((((u32)(x)))>>16)) +#define WSWAPscb(x) (((u32)(x)<<16) | ((((u32)(x)))>>16)) +#define WSWAPcmd(x) (((u32)(x)<<16) | ((((u32)(x)))>>16)) +#define WSWAPtbd(x) (((u32)(x)<<16) | ((((u32)(x)))>>16)) +#define WSWAPchar(x) (((u32)(x)<<16) | ((((u32)(x)))>>16)) +#define ISCP_BUSY 0x00010000 +#define MACH_IS_APRICOT 0 +#else +#define WSWAPrfd(x) ((struct i596_rfd *)(x)) +#define WSWAPrbd(x) ((struct i596_rbd *)(x)) +#define WSWAPiscp(x) ((struct i596_iscp *)(x)) +#define WSWAPscb(x) ((struct i596_scb *)(x)) +#define WSWAPcmd(x) ((struct i596_cmd *)(x)) +#define WSWAPtbd(x) ((struct i596_tbd *)(x)) +#define WSWAPchar(x) ((char *)(x)) +#define ISCP_BUSY 0x0001 +#define MACH_IS_APRICOT 1 +#endif + +/* + * The MPU_PORT command allows direct access to the 82596. With PORT access + * the following commands are available (p5-18). The 32-bit port command + * must be word-swapped with the most significant word written first. + * This only applies to VME boards. + */ +#define PORT_RESET 0x00 /* reset 82596 */ +#define PORT_SELFTEST 0x01 /* selftest */ +#define PORT_ALTSCP 0x02 /* alternate SCB address */ +#define PORT_ALTDUMP 0x03 /* Alternate DUMP address */ + +static int i596_debug = (DEB_SERIOUS|DEB_PROBE); + +MODULE_AUTHOR("Richard Hirst"); +MODULE_DESCRIPTION("i82596 driver"); +MODULE_LICENSE("GPL"); +MODULE_PARM(i596_debug, "i"); +MODULE_PARM_DESC(i596_debug, "lasi_82596 debug mask"); + +/* Copy frames shorter than rx_copybreak, otherwise pass on up in + * a full sized sk_buff. Value of 100 stolen from tulip.c (!alpha). + */ +static int rx_copybreak = 100; + +#define MAX_DRIVERS 4 /* max count of drivers */ + +#define PKT_BUF_SZ 1536 +#define MAX_MC_CNT 64 + +#define I596_NULL ((u32)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, CmdSASetup = 1, CmdConfigure = 2, CmdMulticastList = 3, + CmdTx = 4, CmdTDR = 5, CmdDump = 6, CmdDiagnose = 7 +}; + +#define STAT_C 0x8000 /* Set to 0 after execution */ +#define STAT_B 0x4000 /* Command being executed */ +#define STAT_OK 0x2000 /* Command executed ok */ +#define STAT_A 0x1000 /* Command aborted */ + +#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 + +#define TX_TIMEOUT 5 + +#define OPT_SWAP_PORT 0x0001 /* Need to wordswp on the MPU port */ + + +struct i596_reg { + unsigned short porthi; + unsigned short portlo; + u32 ca; +}; + +#define EOF 0x8000 +#define SIZE_MASK 0x3fff + +struct i596_tbd { + unsigned short size; + unsigned short pad; + dma_addr_t next; + dma_addr_t data; + u32 cache_pad[5]; /* Total 32 bytes... */ +}; + +/* The command structure has two 'next' pointers; v_next is the address of + * the next command as seen by the CPU, b_next is the address of the next + * command as seen by the 82596. The b_next pointer, as used by the 82596 + * always references the status field of the next command, rather than the + * v_next field, because the 82596 is unaware of v_next. It may seem more + * logical to put v_next at the end of the structure, but we cannot do that + * because the 82596 expects other fields to be there, depending on command + * type. + */ + +struct i596_cmd { + struct i596_cmd *v_next; /* Address from CPUs viewpoint */ + unsigned short status; + unsigned short command; + dma_addr_t b_next; /* Address from i596 viewpoint */ +}; + +struct tx_cmd { + struct i596_cmd cmd; + dma_addr_t tbd; + unsigned short size; + unsigned short pad; + struct sk_buff *skb; /* So we can free it after tx */ + dma_addr_t dma_addr; +#ifdef __LP64__ + u32 cache_pad[6]; /* Total 64 bytes... */ +#else + u32 cache_pad[1]; /* Total 32 bytes... */ +#endif +}; + +struct tdr_cmd { + struct i596_cmd cmd; + unsigned short status; + unsigned short pad; +}; + +struct mc_cmd { + struct i596_cmd cmd; + short mc_cnt; + char mc_addrs[MAX_MC_CNT*6]; +}; + +struct sa_cmd { + struct i596_cmd cmd; + char eth_addr[8]; +}; + +struct cf_cmd { + struct i596_cmd cmd; + char i596_config[16]; +}; + +struct i596_rfd { + unsigned short stat; + unsigned short cmd; + dma_addr_t b_next; /* Address from i596 viewpoint */ + dma_addr_t rbd; + unsigned short count; + unsigned short size; + struct i596_rfd *v_next; /* Address from CPUs viewpoint */ + struct i596_rfd *v_prev; +#ifndef __LP64__ + u32 cache_pad[2]; /* Total 32 bytes... */ +#endif +}; + +struct i596_rbd { + /* hardware data */ + unsigned short count; + unsigned short zero1; + dma_addr_t b_next; + dma_addr_t b_data; /* Address from i596 viewpoint */ + unsigned short size; + unsigned short zero2; + /* driver data */ + struct sk_buff *skb; + struct i596_rbd *v_next; + dma_addr_t b_addr; /* This rbd addr from i596 view */ + unsigned char *v_data; /* Address from CPUs viewpoint */ + /* Total 32 bytes... */ +#ifdef __LP64__ + u32 cache_pad[4]; +#endif +}; + +/* These values as chosen so struct i596_private fits in one page... */ + +#define TX_RING_SIZE 32 +#define RX_RING_SIZE 16 + +struct i596_scb { + unsigned short status; + unsigned short command; + dma_addr_t cmd; + dma_addr_t rfd; + u32 crc_err; + u32 align_err; + u32 resource_err; + u32 over_err; + u32 rcvdt_err; + u32 short_err; + unsigned short t_on; + unsigned short t_off; +}; + +struct i596_iscp { + u32 stat; + dma_addr_t scb; +}; + +struct i596_scp { + u32 sysbus; + u32 pad; + dma_addr_t iscp; +}; + +struct i596_private { + volatile struct i596_scp scp __attribute__((aligned(32))); + volatile struct i596_iscp iscp __attribute__((aligned(32))); + volatile struct i596_scb scb __attribute__((aligned(32))); + struct sa_cmd sa_cmd __attribute__((aligned(32))); + struct cf_cmd cf_cmd __attribute__((aligned(32))); + struct tdr_cmd tdr_cmd __attribute__((aligned(32))); + struct mc_cmd mc_cmd __attribute__((aligned(32))); + struct i596_rfd rfds[RX_RING_SIZE] __attribute__((aligned(32))); + struct i596_rbd rbds[RX_RING_SIZE] __attribute__((aligned(32))); + struct tx_cmd tx_cmds[TX_RING_SIZE] __attribute__((aligned(32))); + struct i596_tbd tbds[TX_RING_SIZE] __attribute__((aligned(32))); + u32 stat; + int last_restart; + struct i596_rfd *rfd_head; + struct i596_rbd *rbd_head; + struct i596_cmd *cmd_tail; + struct i596_cmd *cmd_head; + int cmd_backlog; + u32 last_cmd; + struct net_device_stats stats; + int next_tx_cmd; + int options; + spinlock_t lock; + dma_addr_t dma_addr; + struct device *dev; +}; + +static char init_setup[] = +{ + 0x8E, /* length, prefetch on */ + 0xC8, /* fifo to 8, monitor off */ + 0x80, /* don't save bad frames */ + 0x2E, /* No source address insertion, 8 byte preamble */ + 0x00, /* priority and backoff defaults */ + 0x60, /* interframe spacing */ + 0x00, /* slot time LSB */ + 0xf2, /* slot time and retries */ + 0x00, /* promiscuous mode */ + 0x00, /* collision detect */ + 0x40, /* minimum frame length */ + 0xff, + 0x00, + 0x7f /* *multi IA */ }; + +static int i596_open(struct net_device *dev); +static int i596_start_xmit(struct sk_buff *skb, struct net_device *dev); +static irqreturn_t i596_interrupt(int irq, void *dev_id, struct pt_regs *regs); +static int i596_close(struct net_device *dev); +static struct net_device_stats *i596_get_stats(struct net_device *dev); +static void i596_add_cmd(struct net_device *dev, struct i596_cmd *cmd); +static void i596_tx_timeout (struct net_device *dev); +static void print_eth(unsigned char *buf, char *str); +static void set_multicast_list(struct net_device *dev); + +static int rx_ring_size = RX_RING_SIZE; +static int ticks_limit = 100; +static int max_cmd_backlog = TX_RING_SIZE-1; + + +static inline void CA(struct net_device *dev) +{ + gsc_writel(0, dev->base_addr + PA_CHANNEL_ATTENTION); +} + + +static inline void MPU_PORT(struct net_device *dev, int c, dma_addr_t x) +{ + struct i596_private *lp = dev->priv; + + 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); +} + + +static inline int wait_istat(struct net_device *dev, struct i596_private *lp, int delcnt, char *str) +{ + CHECK_INV(&(lp->iscp), sizeof(struct i596_iscp)); + while (--delcnt && lp->iscp.stat) { + udelay(10); + CHECK_INV(&(lp->iscp), sizeof(struct i596_iscp)); + } + if (!delcnt) { + printk("%s: %s, iscp.stat %04x, didn't clear\n", + dev->name, str, lp->iscp.stat); + return -1; + } + else + return 0; +} + + +static inline int wait_cmd(struct net_device *dev, struct i596_private *lp, int delcnt, char *str) +{ + CHECK_INV(&(lp->scb), sizeof(struct i596_scb)); + while (--delcnt && lp->scb.command) { + udelay(10); + CHECK_INV(&(lp->scb), sizeof(struct i596_scb)); + } + if (!delcnt) { + printk("%s: %s, status %4.4x, cmd %4.4x.\n", + dev->name, str, lp->scb.status, lp->scb.command); + return -1; + } + else + return 0; +} + + +static void i596_display_data(struct net_device *dev) +{ + struct i596_private *lp = dev->priv; + struct i596_cmd *cmd; + struct i596_rfd *rfd; + struct i596_rbd *rbd; + + printk("lp and scp at %p, .sysbus = %08x, .iscp = %08x\n", + &lp->scp, lp->scp.sysbus, lp->scp.iscp); + printk("iscp at %p, iscp.stat = %08x, .scb = %08x\n", + &lp->iscp, lp->iscp.stat, lp->iscp.scb); + printk("scb at %p, scb.status = %04x, .command = %04x," + " .cmd = %08x, .rfd = %08x\n", + &lp->scb, lp->scb.status, lp->scb.command, + lp->scb.cmd, lp->scb.rfd); + printk(" errors: crc %x, align %x, resource %x," + " over %x, rcvdt %x, short %x\n", + lp->scb.crc_err, lp->scb.align_err, lp->scb.resource_err, + lp->scb.over_err, lp->scb.rcvdt_err, lp->scb.short_err); + cmd = lp->cmd_head; + while (cmd != NULL) { + printk("cmd at %p, .status = %04x, .command = %04x, .b_next = %08x\n", + cmd, cmd->status, cmd->command, cmd->b_next); + cmd = cmd->v_next; + } + rfd = lp->rfd_head; + printk("rfd_head = %p\n", rfd); + do { + printk(" %p .stat %04x, .cmd %04x, b_next %08x, rbd %08x," + " count %04x\n", + rfd, rfd->stat, rfd->cmd, rfd->b_next, rfd->rbd, + rfd->count); + rfd = rfd->v_next; + } while (rfd != lp->rfd_head); + rbd = lp->rbd_head; + printk("rbd_head = %p\n", rbd); + do { + printk(" %p .count %04x, b_next %08x, b_data %08x, size %04x\n", + rbd, rbd->count, rbd->b_next, rbd->b_data, rbd->size); + rbd = rbd->v_next; + } while (rbd != lp->rbd_head); + CHECK_INV(lp, sizeof(struct i596_private)); +} + + +#if defined(ENABLE_MVME16x_NET) || defined(ENABLE_BVME6000_NET) +static void i596_error(int irq, void *dev_id, struct pt_regs *regs) +{ + struct net_device *dev = dev_id; + volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000; + + pcc2[0x28] = 1; + pcc2[0x2b] = 0x1d; + printk("%s: Error interrupt\n", dev->name); + i596_display_data(dev); +} +#endif + +#define virt_to_dma(lp,v) ((lp)->dma_addr + (dma_addr_t)((unsigned long)(v)-(unsigned long)(lp))) + +static inline void init_rx_bufs(struct net_device *dev) +{ + struct i596_private *lp = dev->priv; + int i; + struct i596_rfd *rfd; + struct i596_rbd *rbd; + + /* First build the Receive Buffer Descriptor List */ + + for (i = 0, rbd = lp->rbds; i < rx_ring_size; i++, rbd++) { + dma_addr_t dma_addr; + struct sk_buff *skb = dev_alloc_skb(PKT_BUF_SZ + 4); + + if (skb == NULL) + panic("%s: alloc_skb() failed", __FILE__); + skb_reserve(skb, 2); + dma_addr = dma_map_single(lp->dev, skb->tail,PKT_BUF_SZ, + DMA_FROM_DEVICE); + skb->dev = dev; + rbd->v_next = rbd+1; + rbd->b_next = WSWAPrbd(virt_to_dma(lp,rbd+1)); + rbd->b_addr = WSWAPrbd(virt_to_dma(lp,rbd)); + rbd->skb = skb; + rbd->v_data = skb->tail; + rbd->b_data = WSWAPchar(dma_addr); + rbd->size = PKT_BUF_SZ; + } + lp->rbd_head = lp->rbds; + rbd = lp->rbds + rx_ring_size - 1; + rbd->v_next = lp->rbds; + rbd->b_next = WSWAPrbd(virt_to_dma(lp,lp->rbds)); + + /* Now build the Receive Frame Descriptor List */ + + for (i = 0, rfd = lp->rfds; i < rx_ring_size; i++, rfd++) { + rfd->rbd = I596_NULL; + rfd->v_next = rfd+1; + rfd->v_prev = rfd-1; + rfd->b_next = WSWAPrfd(virt_to_dma(lp,rfd+1)); + rfd->cmd = CMD_FLEX; + } + lp->rfd_head = lp->rfds; + lp->scb.rfd = WSWAPrfd(virt_to_dma(lp,lp->rfds)); + rfd = lp->rfds; + rfd->rbd = WSWAPrbd(virt_to_dma(lp,lp->rbd_head)); + rfd->v_prev = lp->rfds + rx_ring_size - 1; + rfd = lp->rfds + rx_ring_size - 1; + rfd->v_next = lp->rfds; + rfd->b_next = WSWAPrfd(virt_to_dma(lp,lp->rfds)); + rfd->cmd = CMD_EOL|CMD_FLEX; + + CHECK_WBACK_INV(lp, sizeof(struct i596_private)); +} + +static inline void remove_rx_bufs(struct net_device *dev) +{ + struct i596_private *lp = dev->priv; + struct i596_rbd *rbd; + int i; + + for (i = 0, rbd = lp->rbds; i < rx_ring_size; i++, rbd++) { + if (rbd->skb == NULL) + break; + dma_unmap_single(lp->dev, + (dma_addr_t)WSWAPchar(rbd->b_data), + PKT_BUF_SZ, DMA_FROM_DEVICE); + dev_kfree_skb(rbd->skb); + } +} + + +static void rebuild_rx_bufs(struct net_device *dev) +{ + struct i596_private *lp = dev->priv; + int i; + + /* Ensure rx frame/buffer descriptors are tidy */ + + for (i = 0; i < rx_ring_size; i++) { + lp->rfds[i].rbd = I596_NULL; + lp->rfds[i].cmd = CMD_FLEX; + } + lp->rfds[rx_ring_size-1].cmd = CMD_EOL|CMD_FLEX; + lp->rfd_head = lp->rfds; + lp->scb.rfd = WSWAPrfd(virt_to_dma(lp,lp->rfds)); + lp->rbd_head = lp->rbds; + lp->rfds[0].rbd = WSWAPrbd(virt_to_dma(lp,lp->rbds)); + + CHECK_WBACK_INV(lp, sizeof(struct i596_private)); +} + + +static int init_i596_mem(struct net_device *dev) +{ + struct i596_private *lp = dev->priv; + unsigned long flags; + + disable_irq(dev->irq); /* disable IRQs from LAN */ + DEB(DEB_INIT, + printk("RESET 82596 port: %p (with IRQ %d disabled)\n", + (void*)(dev->base_addr + PA_I82596_RESET), + dev->irq)); + + gsc_writel(0, (void*)(dev->base_addr + PA_I82596_RESET)); /* Hard Reset */ + udelay(100); /* Wait 100us - seems to help */ + + /* change the scp address */ + + lp->last_cmd = jiffies; + + + lp->scp.sysbus = 0x0000006c; + lp->scp.iscp = WSWAPiscp(virt_to_dma(lp,&(lp->iscp))); + lp->iscp.scb = WSWAPscb(virt_to_dma(lp,&(lp->scb))); + lp->iscp.stat = ISCP_BUSY; + lp->cmd_backlog = 0; + + lp->cmd_head = NULL; + lp->scb.cmd = I596_NULL; + + DEB(DEB_INIT, printk("%s: starting i82596.\n", dev->name)); + + CHECK_WBACK(&(lp->scp), sizeof(struct i596_scp)); + CHECK_WBACK(&(lp->iscp), sizeof(struct i596_iscp)); + + MPU_PORT(dev, PORT_ALTSCP, virt_to_dma(lp,&lp->scp)); + + CA(dev); + + if (wait_istat(dev, lp, 1000, "initialization timed out")) + goto failed; + DEB(DEB_INIT, printk("%s: i82596 initialization successful\n", dev->name)); + + /* Ensure rx frame/buffer descriptors are tidy */ + rebuild_rx_bufs(dev); + + lp->scb.command = 0; + CHECK_WBACK(&(lp->scb), sizeof(struct i596_scb)); + + enable_irq(dev->irq); /* enable IRQs from LAN */ + + DEB(DEB_INIT, printk("%s: queuing CmdConfigure\n", dev->name)); + memcpy(lp->cf_cmd.i596_config, init_setup, 14); + lp->cf_cmd.cmd.command = CmdConfigure; + CHECK_WBACK(&(lp->cf_cmd), sizeof(struct cf_cmd)); + i596_add_cmd(dev, &lp->cf_cmd.cmd); + + DEB(DEB_INIT, printk("%s: queuing CmdSASetup\n", dev->name)); + memcpy(lp->sa_cmd.eth_addr, dev->dev_addr, 6); + lp->sa_cmd.cmd.command = CmdSASetup; + CHECK_WBACK(&(lp->sa_cmd), sizeof(struct sa_cmd)); + i596_add_cmd(dev, &lp->sa_cmd.cmd); + + DEB(DEB_INIT, printk("%s: queuing CmdTDR\n", dev->name)); + lp->tdr_cmd.cmd.command = CmdTDR; + CHECK_WBACK(&(lp->tdr_cmd), sizeof(struct tdr_cmd)); + i596_add_cmd(dev, &lp->tdr_cmd.cmd); + + spin_lock_irqsave (&lp->lock, flags); + + if (wait_cmd(dev, lp, 1000, "timed out waiting to issue RX_START")) { + spin_unlock_irqrestore (&lp->lock, flags); + goto failed; + } + DEB(DEB_INIT, printk("%s: Issuing RX_START\n", dev->name)); + lp->scb.command = RX_START; + lp->scb.rfd = WSWAPrfd(virt_to_dma(lp,lp->rfds)); + CHECK_WBACK(&(lp->scb), sizeof(struct i596_scb)); + + CA(dev); + + spin_unlock_irqrestore (&lp->lock, flags); + + if (wait_cmd(dev, lp, 1000, "RX_START not processed")) + goto failed; + DEB(DEB_INIT, printk("%s: Receive unit started OK\n", dev->name)); + + return 0; + +failed: + printk("%s: Failed to initialise 82596\n", dev->name); + MPU_PORT(dev, PORT_RESET, 0); + return -1; +} + + +static inline int i596_rx(struct net_device *dev) +{ + struct i596_private *lp = dev->priv; + struct i596_rfd *rfd; + struct i596_rbd *rbd; + int frames = 0; + + DEB(DEB_RXFRAME, printk("i596_rx(), rfd_head %p, rbd_head %p\n", + lp->rfd_head, lp->rbd_head)); + + + rfd = lp->rfd_head; /* Ref next frame to check */ + + CHECK_INV(rfd, sizeof(struct i596_rfd)); + while ((rfd->stat) & STAT_C) { /* Loop while complete frames */ + if (rfd->rbd == I596_NULL) + rbd = NULL; + else if (rfd->rbd == lp->rbd_head->b_addr) { + rbd = lp->rbd_head; + CHECK_INV(rbd, sizeof(struct i596_rbd)); + } + else { + printk("%s: rbd chain broken!\n", dev->name); + /* XXX Now what? */ + rbd = NULL; + } + DEB(DEB_RXFRAME, printk(" rfd %p, rfd.rbd %08x, rfd.stat %04x\n", + rfd, rfd->rbd, rfd->stat)); + + if (rbd != NULL && ((rfd->stat) & STAT_OK)) { + /* a good frame */ + int pkt_len = rbd->count & 0x3fff; + struct sk_buff *skb = rbd->skb; + int rx_in_place = 0; + + DEB(DEB_RXADDR,print_eth(rbd->v_data, "received")); + frames++; + + /* Check if the packet is long enough to just accept + * without copying to a properly sized skbuff. + */ + + if (pkt_len > rx_copybreak) { + struct sk_buff *newskb; + dma_addr_t dma_addr; + + dma_unmap_single(lp->dev,(dma_addr_t)WSWAPchar(rbd->b_data), PKT_BUF_SZ, DMA_FROM_DEVICE); + /* Get fresh skbuff to replace filled one. */ + newskb = dev_alloc_skb(PKT_BUF_SZ + 4); + if (newskb == NULL) { + skb = NULL; /* drop pkt */ + goto memory_squeeze; + } + skb_reserve(newskb, 2); + + /* Pass up the skb already on the Rx ring. */ + skb_put(skb, pkt_len); + rx_in_place = 1; + rbd->skb = newskb; + newskb->dev = dev; + dma_addr = dma_map_single(lp->dev, newskb->tail, PKT_BUF_SZ, DMA_FROM_DEVICE); + rbd->v_data = newskb->tail; + rbd->b_data = WSWAPchar(dma_addr); + CHECK_WBACK_INV(rbd, sizeof(struct i596_rbd)); + } + else + skb = dev_alloc_skb(pkt_len + 2); +memory_squeeze: + if (skb == NULL) { + /* XXX tulip.c can defer packets here!! */ + printk("%s: i596_rx Memory squeeze, dropping packet.\n", dev->name); + lp->stats.rx_dropped++; + } + else { + skb->dev = dev; + if (!rx_in_place) { + /* 16 byte align the data fields */ + dma_sync_single_for_cpu(lp->dev, (dma_addr_t)WSWAPchar(rbd->b_data), PKT_BUF_SZ, DMA_FROM_DEVICE); + skb_reserve(skb, 2); + memcpy(skb_put(skb,pkt_len), rbd->v_data, pkt_len); + dma_sync_single_for_device(lp->dev, (dma_addr_t)WSWAPchar(rbd->b_data), PKT_BUF_SZ, DMA_FROM_DEVICE); + } + skb->len = pkt_len; + skb->protocol=eth_type_trans(skb,dev); + netif_rx(skb); + dev->last_rx = jiffies; + lp->stats.rx_packets++; + lp->stats.rx_bytes+=pkt_len; + } + } + else { + DEB(DEB_ERRORS, printk("%s: Error, rfd.stat = 0x%04x\n", + dev->name, rfd->stat)); + lp->stats.rx_errors++; + if ((rfd->stat) & 0x0001) + lp->stats.collisions++; + if ((rfd->stat) & 0x0080) + lp->stats.rx_length_errors++; + if ((rfd->stat) & 0x0100) + lp->stats.rx_over_errors++; + if ((rfd->stat) & 0x0200) + lp->stats.rx_fifo_errors++; + if ((rfd->stat) & 0x0400) + lp->stats.rx_frame_errors++; + if ((rfd->stat) & 0x0800) + lp->stats.rx_crc_errors++; + if ((rfd->stat) & 0x1000) + lp->stats.rx_length_errors++; + } + + /* Clear the buffer descriptor count and EOF + F flags */ + + if (rbd != NULL && (rbd->count & 0x4000)) { + rbd->count = 0; + lp->rbd_head = rbd->v_next; + CHECK_WBACK_INV(rbd, sizeof(struct i596_rbd)); + } + + /* Tidy the frame descriptor, marking it as end of list */ + + rfd->rbd = I596_NULL; + rfd->stat = 0; + rfd->cmd = CMD_EOL|CMD_FLEX; + rfd->count = 0; + + /* Remove end-of-list from old end descriptor */ + + rfd->v_prev->cmd = CMD_FLEX; + + /* Update record of next frame descriptor to process */ + + lp->scb.rfd = rfd->b_next; + lp->rfd_head = rfd->v_next; + CHECK_WBACK_INV(rfd->v_prev, sizeof(struct i596_rfd)); + CHECK_WBACK_INV(rfd, sizeof(struct i596_rfd)); + rfd = lp->rfd_head; + CHECK_INV(rfd, sizeof(struct i596_rfd)); + } + + DEB(DEB_RXFRAME, printk("frames %d\n", frames)); + + return 0; +} + + +static inline void i596_cleanup_cmd(struct net_device *dev, struct i596_private *lp) +{ + struct i596_cmd *ptr; + + while (lp->cmd_head != NULL) { + ptr = lp->cmd_head; + lp->cmd_head = ptr->v_next; + lp->cmd_backlog--; + + switch ((ptr->command) & 0x7) { + case CmdTx: + { + struct tx_cmd *tx_cmd = (struct tx_cmd *) ptr; + struct sk_buff *skb = tx_cmd->skb; + dma_unmap_single(lp->dev, tx_cmd->dma_addr, skb->len, DMA_TO_DEVICE); + + dev_kfree_skb(skb); + + lp->stats.tx_errors++; + lp->stats.tx_aborted_errors++; + + ptr->v_next = NULL; + ptr->b_next = I596_NULL; + tx_cmd->cmd.command = 0; /* Mark as free */ + break; + } + default: + ptr->v_next = NULL; + ptr->b_next = I596_NULL; + } + CHECK_WBACK_INV(ptr, sizeof(struct i596_cmd)); + } + + wait_cmd(dev, lp, 100, "i596_cleanup_cmd timed out"); + lp->scb.cmd = I596_NULL; + CHECK_WBACK(&(lp->scb), sizeof(struct i596_scb)); +} + + +static inline void i596_reset(struct net_device *dev, struct i596_private *lp) +{ + unsigned long flags; + + DEB(DEB_RESET, printk("i596_reset\n")); + + spin_lock_irqsave (&lp->lock, flags); + + wait_cmd(dev, lp, 100, "i596_reset timed out"); + + netif_stop_queue(dev); + + /* FIXME: this command might cause an lpmc */ + lp->scb.command = CUC_ABORT | RX_ABORT; + CHECK_WBACK(&(lp->scb), sizeof(struct i596_scb)); + CA(dev); + + /* wait for shutdown */ + wait_cmd(dev, lp, 1000, "i596_reset 2 timed out"); + spin_unlock_irqrestore (&lp->lock, flags); + + i596_cleanup_cmd(dev,lp); + i596_rx(dev); + + netif_start_queue(dev); + init_i596_mem(dev); +} + + +static void i596_add_cmd(struct net_device *dev, struct i596_cmd *cmd) +{ + struct i596_private *lp = dev->priv; + unsigned long flags; + + DEB(DEB_ADDCMD, printk("i596_add_cmd cmd_head %p\n", lp->cmd_head)); + + cmd->status = 0; + cmd->command |= (CMD_EOL | CMD_INTR); + cmd->v_next = NULL; + cmd->b_next = I596_NULL; + CHECK_WBACK(cmd, sizeof(struct i596_cmd)); + + spin_lock_irqsave (&lp->lock, flags); + + if (lp->cmd_head != NULL) { + lp->cmd_tail->v_next = cmd; + lp->cmd_tail->b_next = WSWAPcmd(virt_to_dma(lp,&cmd->status)); + CHECK_WBACK(lp->cmd_tail, sizeof(struct i596_cmd)); + } else { + lp->cmd_head = cmd; + wait_cmd(dev, lp, 100, "i596_add_cmd timed out"); + lp->scb.cmd = WSWAPcmd(virt_to_dma(lp,&cmd->status)); + lp->scb.command = CUC_START; + CHECK_WBACK(&(lp->scb), sizeof(struct i596_scb)); + CA(dev); + } + lp->cmd_tail = cmd; + lp->cmd_backlog++; + + spin_unlock_irqrestore (&lp->lock, flags); + + if (lp->cmd_backlog > max_cmd_backlog) { + unsigned long tickssofar = jiffies - lp->last_cmd; + + if (tickssofar < ticks_limit) + return; + + printk("%s: command unit timed out, status resetting.\n", dev->name); +#if 1 + i596_reset(dev, lp); +#endif + } +} + +#if 0 +/* this function makes a perfectly adequate probe... but we have a + device list */ +static int i596_test(struct net_device *dev) +{ + struct i596_private *lp = dev->priv; + volatile int *tint; + u32 data; + + tint = (volatile int *)(&(lp->scp)); + data = virt_to_dma(lp,tint); + + tint[1] = -1; + CHECK_WBACK(tint,PAGE_SIZE); + + MPU_PORT(dev, 1, data); + + for(data = 1000000; data; data--) { + CHECK_INV(tint,PAGE_SIZE); + if(tint[1] != -1) + break; + + } + + printk("i596_test result %d\n", tint[1]); + +} +#endif + + +static int i596_open(struct net_device *dev) +{ + DEB(DEB_OPEN, printk("%s: i596_open() irq %d.\n", dev->name, dev->irq)); + + if (request_irq(dev->irq, &i596_interrupt, 0, "i82596", dev)) { + printk("%s: IRQ %d not free\n", dev->name, dev->irq); + goto out; + } + + init_rx_bufs(dev); + + if (init_i596_mem(dev)) { + printk("%s: Failed to init memory\n", dev->name); + goto out_remove_rx_bufs; + } + + netif_start_queue(dev); + + return 0; + +out_remove_rx_bufs: + remove_rx_bufs(dev); + free_irq(dev->irq, dev); +out: + return -EAGAIN; +} + +static void i596_tx_timeout (struct net_device *dev) +{ + struct i596_private *lp = dev->priv; + + /* Transmitter timeout, serious problems. */ + DEB(DEB_ERRORS, printk("%s: transmit timed out, status resetting.\n", + dev->name)); + + lp->stats.tx_errors++; + + /* Try to restart the adaptor */ + if (lp->last_restart == lp->stats.tx_packets) { + DEB(DEB_ERRORS, printk("Resetting board.\n")); + /* Shutdown and restart */ + i596_reset (dev, lp); + } else { + /* Issue a channel attention signal */ + DEB(DEB_ERRORS, printk("Kicking board.\n")); + lp->scb.command = CUC_START | RX_START; + CHECK_WBACK_INV(&(lp->scb), sizeof(struct i596_scb)); + CA (dev); + lp->last_restart = lp->stats.tx_packets; + } + + dev->trans_start = jiffies; + netif_wake_queue (dev); +} + + +static int i596_start_xmit(struct sk_buff *skb, struct net_device *dev) +{ + struct i596_private *lp = dev->priv; + struct tx_cmd *tx_cmd; + struct i596_tbd *tbd; + short length = skb->len; + dev->trans_start = jiffies; + + DEB(DEB_STARTTX, printk("%s: i596_start_xmit(%x,%p) called\n", dev->name, + skb->len, skb->data)); + + if (length < ETH_ZLEN) { + skb = skb_padto(skb, ETH_ZLEN); + if (skb == NULL) + return 0; + length = ETH_ZLEN; + } + + netif_stop_queue(dev); + + tx_cmd = lp->tx_cmds + lp->next_tx_cmd; + tbd = lp->tbds + lp->next_tx_cmd; + + if (tx_cmd->cmd.command) { + DEB(DEB_ERRORS, printk("%s: xmit ring full, dropping packet.\n", + dev->name)); + lp->stats.tx_dropped++; + + dev_kfree_skb(skb); + } else { + if (++lp->next_tx_cmd == TX_RING_SIZE) + lp->next_tx_cmd = 0; + tx_cmd->tbd = WSWAPtbd(virt_to_dma(lp,tbd)); + tbd->next = I596_NULL; + + tx_cmd->cmd.command = CMD_FLEX | CmdTx; + tx_cmd->skb = skb; + + tx_cmd->pad = 0; + tx_cmd->size = 0; + tbd->pad = 0; + tbd->size = EOF | length; + + tx_cmd->dma_addr = dma_map_single(lp->dev, skb->data, skb->len, + DMA_TO_DEVICE); + tbd->data = WSWAPchar(tx_cmd->dma_addr); + + DEB(DEB_TXADDR,print_eth(skb->data, "tx-queued")); + CHECK_WBACK_INV(tx_cmd, sizeof(struct tx_cmd)); + CHECK_WBACK_INV(tbd, sizeof(struct i596_tbd)); + i596_add_cmd(dev, &tx_cmd->cmd); + + lp->stats.tx_packets++; + lp->stats.tx_bytes += length; + } + + netif_start_queue(dev); + + return 0; +} + +static void print_eth(unsigned char *add, char *str) +{ + int i; + + printk("i596 0x%p, ", add); + for (i = 0; i < 6; i++) + printk(" %02X", add[i + 6]); + printk(" -->"); + for (i = 0; i < 6; i++) + printk(" %02X", add[i]); + printk(" %02X%02X, %s\n", add[12], add[13], str); +} + + +#define LAN_PROM_ADDR 0xF0810000 + +static int __devinit i82596_probe(struct net_device *dev, + struct device *gen_dev) +{ + int i; + struct i596_private *lp; + char eth_addr[6]; + dma_addr_t dma_addr; + + /* This lot is ensure things have been cache line aligned. */ + if (sizeof(struct i596_rfd) != 32) { + printk("82596: sizeof(struct i596_rfd) = %d\n", + (int)sizeof(struct i596_rfd)); + return -ENODEV; + } + if ((sizeof(struct i596_rbd) % 32) != 0) { + printk("82596: sizeof(struct i596_rbd) = %d\n", + (int)sizeof(struct i596_rbd)); + return -ENODEV; + } + if ((sizeof(struct tx_cmd) % 32) != 0) { + printk("82596: sizeof(struct tx_cmd) = %d\n", + (int)sizeof(struct tx_cmd)); + return -ENODEV; + } + if (sizeof(struct i596_tbd) != 32) { + printk("82596: sizeof(struct i596_tbd) = %d\n", + (int)sizeof(struct i596_tbd)); + return -ENODEV; + } +#ifndef __LP64__ + if (sizeof(struct i596_private) > 4096) { + printk("82596: sizeof(struct i596_private) = %d\n", + (int)sizeof(struct i596_private)); + return -ENODEV; + } +#endif + + if (!dev->base_addr || !dev->irq) + return -ENODEV; + + if (pdc_lan_station_id(eth_addr, dev->base_addr)) { + for (i=0; i < 6; i++) { + eth_addr[i] = gsc_readb(LAN_PROM_ADDR + i); + } + printk(KERN_INFO "%s: MAC of HP700 LAN read from EEPROM\n", __FILE__); + } + + dev->mem_start = (unsigned long) dma_alloc_noncoherent(gen_dev, + sizeof(struct i596_private), &dma_addr, GFP_KERNEL); + if (!dev->mem_start) { + printk(KERN_ERR "%s: Couldn't get shared memory\n", __FILE__); + return -ENOMEM; + } + + for (i = 0; i < 6; i++) + dev->dev_addr[i] = eth_addr[i]; + + /* The 82596-specific entries in the device structure. */ + dev->open = i596_open; + dev->stop = i596_close; + dev->hard_start_xmit = i596_start_xmit; + dev->get_stats = i596_get_stats; + dev->set_multicast_list = set_multicast_list; + dev->tx_timeout = i596_tx_timeout; + dev->watchdog_timeo = TX_TIMEOUT; + + dev->priv = (void *)(dev->mem_start); + + lp = dev->priv; + memset(lp, 0, sizeof(struct i596_private)); + + lp->scb.command = 0; + lp->scb.cmd = I596_NULL; + lp->scb.rfd = I596_NULL; + spin_lock_init(&lp->lock); + lp->dma_addr = dma_addr; + lp->dev = gen_dev; + + CHECK_WBACK_INV(dev->mem_start, sizeof(struct i596_private)); + + i = register_netdev(dev); + if (i) { + lp = dev->priv; + dma_free_noncoherent(lp->dev, sizeof(struct i596_private), + (void *)dev->mem_start, lp->dma_addr); + return i; + }; + + DEB(DEB_PROBE, printk(KERN_INFO "%s: 82596 at %#3lx,", dev->name, dev->base_addr)); + for (i = 0; i < 6; i++) + DEB(DEB_PROBE, printk(" %2.2X", dev->dev_addr[i])); + DEB(DEB_PROBE, printk(" IRQ %d.\n", dev->irq)); + DEB(DEB_INIT, printk(KERN_INFO "%s: lp at 0x%p (%d bytes), lp->scb at 0x%p\n", + dev->name, lp, (int)sizeof(struct i596_private), &lp->scb)); + + return 0; +} + + +static irqreturn_t i596_interrupt(int irq, void *dev_id, struct pt_regs *regs) +{ + struct net_device *dev = dev_id; + struct i596_private *lp; + unsigned short status, ack_cmd = 0; + + if (dev == NULL) { + printk("%s: irq %d for unknown device.\n", __FUNCTION__, irq); + return IRQ_NONE; + } + + lp = dev->priv; + + spin_lock (&lp->lock); + + wait_cmd(dev, lp, 100, "i596 interrupt, timeout"); + status = lp->scb.status; + + DEB(DEB_INTS, printk("%s: i596 interrupt, IRQ %d, status %4.4x.\n", + dev->name, irq, status)); + + ack_cmd = status & 0xf000; + + if (!ack_cmd) { + DEB(DEB_ERRORS, printk("%s: interrupt with no events\n", dev->name)); + spin_unlock (&lp->lock); + return IRQ_NONE; + } + + if ((status & 0x8000) || (status & 0x2000)) { + struct i596_cmd *ptr; + + if ((status & 0x8000)) + DEB(DEB_INTS, printk("%s: i596 interrupt completed command.\n", dev->name)); + if ((status & 0x2000)) + DEB(DEB_INTS, printk("%s: i596 interrupt command unit inactive %x.\n", dev->name, status & 0x0700)); + + while (lp->cmd_head != NULL) { + CHECK_INV(lp->cmd_head, sizeof(struct i596_cmd)); + if (!(lp->cmd_head->status & STAT_C)) + break; + + ptr = lp->cmd_head; + + DEB(DEB_STATUS, printk("cmd_head->status = %04x, ->command = %04x\n", + lp->cmd_head->status, lp->cmd_head->command)); + lp->cmd_head = ptr->v_next; + lp->cmd_backlog--; + + switch ((ptr->command) & 0x7) { + case CmdTx: + { + struct tx_cmd *tx_cmd = (struct tx_cmd *) ptr; + struct sk_buff *skb = tx_cmd->skb; + + if ((ptr->status) & STAT_OK) { + DEB(DEB_TXADDR, print_eth(skb->data, "tx-done")); + } else { + lp->stats.tx_errors++; + if ((ptr->status) & 0x0020) + lp->stats.collisions++; + if (!((ptr->status) & 0x0040)) + lp->stats.tx_heartbeat_errors++; + if ((ptr->status) & 0x0400) + lp->stats.tx_carrier_errors++; + if ((ptr->status) & 0x0800) + lp->stats.collisions++; + if ((ptr->status) & 0x1000) + lp->stats.tx_aborted_errors++; + } + dma_unmap_single(lp->dev, tx_cmd->dma_addr, skb->len, DMA_TO_DEVICE); + dev_kfree_skb_irq(skb); + + tx_cmd->cmd.command = 0; /* Mark free */ + break; + } + case CmdTDR: + { + unsigned short status = ((struct tdr_cmd *)ptr)->status; + + if (status & 0x8000) { + DEB(DEB_ANY, 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); + + DEB(DEB_TDR, printk("%s: Time %d.\n", dev->name, status & 0x07ff)); + } + break; + } + case CmdConfigure: + /* Zap command so set_multicast_list() knows it is free */ + ptr->command = 0; + break; + } + ptr->v_next = NULL; + ptr->b_next = I596_NULL; + CHECK_WBACK(ptr, sizeof(struct i596_cmd)); + lp->last_cmd = jiffies; + } + + /* This mess is arranging that only the last of any outstanding + * commands has the interrupt bit set. Should probably really + * only add to the cmd queue when the CU is stopped. + */ + ptr = lp->cmd_head; + while ((ptr != NULL) && (ptr != lp->cmd_tail)) { + struct i596_cmd *prev = ptr; + + ptr->command &= 0x1fff; + ptr = ptr->v_next; + CHECK_WBACK_INV(prev, sizeof(struct i596_cmd)); + } + + if ((lp->cmd_head != NULL)) + ack_cmd |= CUC_START; + lp->scb.cmd = WSWAPcmd(virt_to_dma(lp,&lp->cmd_head->status)); + CHECK_WBACK_INV(&lp->scb, sizeof(struct i596_scb)); + } + if ((status & 0x1000) || (status & 0x4000)) { + if ((status & 0x4000)) + DEB(DEB_INTS, printk("%s: i596 interrupt received a frame.\n", dev->name)); + i596_rx(dev); + /* Only RX_START if stopped - RGH 07-07-96 */ + if (status & 0x1000) { + if (netif_running(dev)) { + DEB(DEB_ERRORS, printk("%s: i596 interrupt receive unit inactive, status 0x%x\n", dev->name, status)); + ack_cmd |= RX_START; + lp->stats.rx_errors++; + lp->stats.rx_fifo_errors++; + rebuild_rx_bufs(dev); + } + } + } + wait_cmd(dev, lp, 100, "i596 interrupt, timeout"); + lp->scb.command = ack_cmd; + CHECK_WBACK(&lp->scb, sizeof(struct i596_scb)); + + /* DANGER: I suspect that some kind of interrupt + acknowledgement aside from acking the 82596 might be needed + here... but it's running acceptably without */ + + CA(dev); + + wait_cmd(dev, lp, 100, "i596 interrupt, exit timeout"); + DEB(DEB_INTS, printk("%s: exiting interrupt.\n", dev->name)); + + spin_unlock (&lp->lock); + return IRQ_HANDLED; +} + +static int i596_close(struct net_device *dev) +{ + struct i596_private *lp = dev->priv; + unsigned long flags; + + netif_stop_queue(dev); + + DEB(DEB_INIT, printk("%s: Shutting down ethercard, status was %4.4x.\n", + dev->name, lp->scb.status)); + + spin_lock_irqsave(&lp->lock, flags); + + wait_cmd(dev, lp, 100, "close1 timed out"); + lp->scb.command = CUC_ABORT | RX_ABORT; + CHECK_WBACK(&lp->scb, sizeof(struct i596_scb)); + + CA(dev); + + wait_cmd(dev, lp, 100, "close2 timed out"); + spin_unlock_irqrestore(&lp->lock, flags); + DEB(DEB_STRUCT,i596_display_data(dev)); + i596_cleanup_cmd(dev,lp); + + disable_irq(dev->irq); + + free_irq(dev->irq, dev); + remove_rx_bufs(dev); + + return 0; +} + +static struct net_device_stats * + i596_get_stats(struct net_device *dev) +{ + struct i596_private *lp = dev->priv; + + return &lp->stats; +} + +/* + * Set or clear the multicast filter for this adaptor. + */ + +static void set_multicast_list(struct net_device *dev) +{ + struct i596_private *lp = dev->priv; + int config = 0, cnt; + + DEB(DEB_MULTI, printk("%s: set multicast list, %d entries, promisc %s, allmulti %s\n", + dev->name, dev->mc_count, dev->flags & IFF_PROMISC ? "ON" : "OFF", + dev->flags & IFF_ALLMULTI ? "ON" : "OFF")); + + if ((dev->flags & IFF_PROMISC) && !(lp->cf_cmd.i596_config[8] & 0x01)) { + lp->cf_cmd.i596_config[8] |= 0x01; + config = 1; + } + if (!(dev->flags & IFF_PROMISC) && (lp->cf_cmd.i596_config[8] & 0x01)) { + lp->cf_cmd.i596_config[8] &= ~0x01; + config = 1; + } + if ((dev->flags & IFF_ALLMULTI) && (lp->cf_cmd.i596_config[11] & 0x20)) { + lp->cf_cmd.i596_config[11] &= ~0x20; + config = 1; + } + if (!(dev->flags & IFF_ALLMULTI) && !(lp->cf_cmd.i596_config[11] & 0x20)) { + lp->cf_cmd.i596_config[11] |= 0x20; + config = 1; + } + if (config) { + if (lp->cf_cmd.cmd.command) + printk("%s: config change request already queued\n", + dev->name); + else { + lp->cf_cmd.cmd.command = CmdConfigure; + CHECK_WBACK_INV(&lp->cf_cmd, sizeof(struct cf_cmd)); + i596_add_cmd(dev, &lp->cf_cmd.cmd); + } + } + + cnt = dev->mc_count; + if (cnt > MAX_MC_CNT) + { + cnt = MAX_MC_CNT; + printk("%s: Only %d multicast addresses supported", + dev->name, cnt); + } + + if (dev->mc_count > 0) { + struct dev_mc_list *dmi; + unsigned char *cp; + struct mc_cmd *cmd; + + cmd = &lp->mc_cmd; + cmd->cmd.command = CmdMulticastList; + cmd->mc_cnt = dev->mc_count * 6; + cp = cmd->mc_addrs; + for (dmi = dev->mc_list; cnt && dmi != NULL; dmi = dmi->next, cnt--, cp += 6) { + memcpy(cp, dmi->dmi_addr, 6); + if (i596_debug > 1) + DEB(DEB_MULTI, printk("%s: Adding address %02x:%02x:%02x:%02x:%02x:%02x\n", + dev->name, cp[0],cp[1],cp[2],cp[3],cp[4],cp[5])); + } + CHECK_WBACK_INV(&lp->mc_cmd, sizeof(struct mc_cmd)); + i596_add_cmd(dev, &cmd->cmd); + } +} + +MODULE_PARM(debug, "i"); +MODULE_PARM_DESC(debug, "lasi_82596 debug mask"); +static int debug = -1; + +static int num_drivers; +static struct net_device *netdevs[MAX_DRIVERS]; + +static int __devinit +lan_init_chip(struct parisc_device *dev) +{ + struct net_device *netdevice; + int retval; + + if (num_drivers >= MAX_DRIVERS) { + /* max count of possible i82596 drivers reached */ + return -ENOMEM; + } + + if (num_drivers == 0) + printk(KERN_INFO LASI_82596_DRIVER_VERSION "\n"); + + if (!dev->irq) { + printk(KERN_ERR "%s: IRQ not found for i82596 at 0x%lx\n", + __FILE__, dev->hpa); + return -ENODEV; + } + + printk(KERN_INFO "Found i82596 at 0x%lx, IRQ %d\n", dev->hpa, dev->irq); + + netdevice = alloc_etherdev(0); + if (!netdevice) + return -ENOMEM; + + netdevice->base_addr = dev->hpa; + netdevice->irq = dev->irq; + + retval = i82596_probe(netdevice, &dev->dev); + if (retval) { + free_netdev(netdevice); + return -ENODEV; + } + + if (dev->id.sversion == 0x72) { + ((struct i596_private *)netdevice->priv)->options = OPT_SWAP_PORT; + } + + netdevs[num_drivers++] = netdevice; + + return retval; +} + + +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 = "Apricot", + .id_table = lan_tbl, + .probe = lan_init_chip, +}; + +static int __devinit lasi_82596_init(void) +{ + if (debug >= 0) + i596_debug = debug; + return register_parisc_driver(&lan_driver); +} + +module_init(lasi_82596_init); + +static void __exit lasi_82596_exit(void) +{ + int i; + + for (i=0; i<MAX_DRIVERS; i++) { + struct i596_private *lp; + struct net_device *netdevice; + + netdevice = netdevs[i]; + if (!netdevice) + continue; + + unregister_netdev(netdevice); + + lp = netdevice->priv; + dma_free_noncoherent(lp->dev, sizeof(struct i596_private), + (void *)netdevice->mem_start, lp->dma_addr); + free_netdev(netdevice); + } + num_drivers = 0; + + unregister_parisc_driver(&lan_driver); +} + +module_exit(lasi_82596_exit); |