| /* |
| * Sun3 i82586 Ethernet driver |
| * |
| * Cloned from ni52.c for the Sun3 by Sam Creasey (sammy@sammy.net) |
| * |
| * Original copyright follows: |
| * -------------------------- |
| * |
| * net-3-driver for the NI5210 card (i82586 Ethernet chip) |
| * |
| * This is an extension to the Linux operating system, and is covered by the |
| * same Gnu Public License that covers that work. |
| * |
| * Alphacode 0.82 (96/09/29) for Linux 2.0.0 (or later) |
| * Copyrights (c) 1994,1995,1996 by M.Hipp (hippm@informatik.uni-tuebingen.de) |
| * -------------------------- |
| * |
| * Consult ni52.c for further notes from the original driver. |
| * |
| * This incarnation currently supports the OBIO version of the i82586 chip |
| * used in certain sun3 models. It should be fairly doable to expand this |
| * to support VME if I should every acquire such a board. |
| * |
| */ |
| |
| static int debuglevel = 0; /* debug-printk 0: off 1: a few 2: more */ |
| static int automatic_resume = 0; /* experimental .. better should be zero */ |
| static int rfdadd = 0; /* rfdadd=1 may be better for 8K MEM cards */ |
| static int fifo=0x8; /* don't change */ |
| |
| #include <linux/module.h> |
| #include <linux/kernel.h> |
| #include <linux/string.h> |
| #include <linux/errno.h> |
| #include <linux/ioport.h> |
| #include <linux/interrupt.h> |
| #include <linux/delay.h> |
| #include <linux/init.h> |
| #include <linux/bitops.h> |
| #include <asm/io.h> |
| #include <asm/idprom.h> |
| #include <asm/machines.h> |
| #include <asm/sun3mmu.h> |
| #include <asm/dvma.h> |
| #include <asm/byteorder.h> |
| |
| #include <linux/netdevice.h> |
| #include <linux/etherdevice.h> |
| #include <linux/skbuff.h> |
| |
| #include "sun3_82586.h" |
| |
| #define DRV_NAME "sun3_82586" |
| |
| #define DEBUG /* debug on */ |
| #define SYSBUSVAL 0 /* 16 Bit */ |
| #define SUN3_82586_TOTAL_SIZE PAGE_SIZE |
| |
| #define sun3_attn586() {*(volatile unsigned char *)(dev->base_addr) |= IEOB_ATTEN; *(volatile unsigned char *)(dev->base_addr) &= ~IEOB_ATTEN;} |
| #define sun3_reset586() {*(volatile unsigned char *)(dev->base_addr) = 0; udelay(100); *(volatile unsigned char *)(dev->base_addr) = IEOB_NORSET;} |
| #define sun3_disint() {*(volatile unsigned char *)(dev->base_addr) &= ~IEOB_IENAB;} |
| #define sun3_enaint() {*(volatile unsigned char *)(dev->base_addr) |= IEOB_IENAB;} |
| #define sun3_active() {*(volatile unsigned char *)(dev->base_addr) |= (IEOB_IENAB|IEOB_ONAIR|IEOB_NORSET);} |
| |
| #define make32(ptr16) (p->memtop + (swab16((unsigned short) (ptr16))) ) |
| #define make24(ptr32) (char *)swab32(( ((unsigned long) (ptr32)) - p->base)) |
| #define make16(ptr32) (swab16((unsigned short) ((unsigned long)(ptr32) - (unsigned long) p->memtop ))) |
| |
| /******************* how to calculate the buffers ***************************** |
| |
| * IMPORTANT NOTE: if you configure only one NUM_XMIT_BUFFS, the driver works |
| * --------------- in a different (more stable?) mode. Only in this mode it's |
| * possible to configure the driver with 'NO_NOPCOMMANDS' |
| |
| sizeof(scp)=12; sizeof(scb)=16; sizeof(iscp)=8; |
| sizeof(scp)+sizeof(iscp)+sizeof(scb) = 36 = INIT |
| sizeof(rfd) = 24; sizeof(rbd) = 12; |
| sizeof(tbd) = 8; sizeof(transmit_cmd) = 16; |
| sizeof(nop_cmd) = 8; |
| |
| * if you don't know the driver, better do not change these values: */ |
| |
| #define RECV_BUFF_SIZE 1536 /* slightly oversized */ |
| #define XMIT_BUFF_SIZE 1536 /* slightly oversized */ |
| #define NUM_XMIT_BUFFS 1 /* config for 32K shmem */ |
| #define NUM_RECV_BUFFS_8 4 /* config for 32K shared mem */ |
| #define NUM_RECV_BUFFS_16 9 /* config for 32K shared mem */ |
| #define NUM_RECV_BUFFS_32 16 /* config for 32K shared mem */ |
| #define NO_NOPCOMMANDS /* only possible with NUM_XMIT_BUFFS=1 */ |
| |
| /**************************************************************************/ |
| |
| /* different DELAYs */ |
| #define DELAY(x) mdelay(32 * x); |
| #define DELAY_16(); { udelay(16); } |
| #define DELAY_18(); { udelay(4); } |
| |
| /* wait for command with timeout: */ |
| #define WAIT_4_SCB_CMD() \ |
| { int i; \ |
| for(i=0;i<16384;i++) { \ |
| if(!p->scb->cmd_cuc) break; \ |
| DELAY_18(); \ |
| if(i == 16383) { \ |
| printk("%s: scb_cmd timed out: %04x,%04x .. disabling i82586!!\n",dev->name,p->scb->cmd_cuc,p->scb->cus); \ |
| if(!p->reseted) { p->reseted = 1; sun3_reset586(); } } } } |
| |
| #define WAIT_4_SCB_CMD_RUC() { int i; \ |
| for(i=0;i<16384;i++) { \ |
| if(!p->scb->cmd_ruc) break; \ |
| DELAY_18(); \ |
| if(i == 16383) { \ |
| printk("%s: scb_cmd (ruc) timed out: %04x,%04x .. disabling i82586!!\n",dev->name,p->scb->cmd_ruc,p->scb->rus); \ |
| if(!p->reseted) { p->reseted = 1; sun3_reset586(); } } } } |
| |
| #define WAIT_4_STAT_COMPL(addr) { int i; \ |
| for(i=0;i<32767;i++) { \ |
| if(swab16((addr)->cmd_status) & STAT_COMPL) break; \ |
| DELAY_16(); DELAY_16(); } } |
| |
| static int sun3_82586_probe1(struct net_device *dev,int ioaddr); |
| static irqreturn_t sun3_82586_interrupt(int irq,void *dev_id); |
| static int sun3_82586_open(struct net_device *dev); |
| static int sun3_82586_close(struct net_device *dev); |
| static int sun3_82586_send_packet(struct sk_buff *,struct net_device *); |
| static struct net_device_stats *sun3_82586_get_stats(struct net_device *dev); |
| static void set_multicast_list(struct net_device *dev); |
| static void sun3_82586_timeout(struct net_device *dev); |
| #if 0 |
| static void sun3_82586_dump(struct net_device *,void *); |
| #endif |
| |
| /* helper-functions */ |
| static int init586(struct net_device *dev); |
| static int check586(struct net_device *dev,char *where,unsigned size); |
| static void alloc586(struct net_device *dev); |
| static void startrecv586(struct net_device *dev); |
| static void *alloc_rfa(struct net_device *dev,void *ptr); |
| static void sun3_82586_rcv_int(struct net_device *dev); |
| static void sun3_82586_xmt_int(struct net_device *dev); |
| static void sun3_82586_rnr_int(struct net_device *dev); |
| |
| struct priv |
| { |
| struct net_device_stats stats; |
| unsigned long base; |
| char *memtop; |
| long int lock; |
| int reseted; |
| volatile struct rfd_struct *rfd_last,*rfd_top,*rfd_first; |
| volatile struct scp_struct *scp; /* volatile is important */ |
| volatile struct iscp_struct *iscp; /* volatile is important */ |
| volatile struct scb_struct *scb; /* volatile is important */ |
| volatile struct tbd_struct *xmit_buffs[NUM_XMIT_BUFFS]; |
| volatile struct transmit_cmd_struct *xmit_cmds[NUM_XMIT_BUFFS]; |
| #if (NUM_XMIT_BUFFS == 1) |
| volatile struct nop_cmd_struct *nop_cmds[2]; |
| #else |
| volatile struct nop_cmd_struct *nop_cmds[NUM_XMIT_BUFFS]; |
| #endif |
| volatile int nop_point,num_recv_buffs; |
| volatile char *xmit_cbuffs[NUM_XMIT_BUFFS]; |
| volatile int xmit_count,xmit_last; |
| }; |
| |
| /********************************************** |
| * close device |
| */ |
| static int sun3_82586_close(struct net_device *dev) |
| { |
| free_irq(dev->irq, dev); |
| |
| sun3_reset586(); /* the hard way to stop the receiver */ |
| |
| netif_stop_queue(dev); |
| |
| return 0; |
| } |
| |
| /********************************************** |
| * open device |
| */ |
| static int sun3_82586_open(struct net_device *dev) |
| { |
| int ret; |
| |
| sun3_disint(); |
| alloc586(dev); |
| init586(dev); |
| startrecv586(dev); |
| sun3_enaint(); |
| |
| ret = request_irq(dev->irq, sun3_82586_interrupt,0,dev->name,dev); |
| if (ret) |
| { |
| sun3_reset586(); |
| return ret; |
| } |
| |
| netif_start_queue(dev); |
| |
| return 0; /* most done by init */ |
| } |
| |
| /********************************************** |
| * Check to see if there's an 82586 out there. |
| */ |
| static int check586(struct net_device *dev,char *where,unsigned size) |
| { |
| struct priv pb; |
| struct priv *p = &pb; |
| char *iscp_addr; |
| int i; |
| |
| p->base = (unsigned long) dvma_btov(0); |
| p->memtop = (char *)dvma_btov((unsigned long)where); |
| p->scp = (struct scp_struct *)(p->base + SCP_DEFAULT_ADDRESS); |
| memset((char *)p->scp,0, sizeof(struct scp_struct)); |
| for(i=0;i<sizeof(struct scp_struct);i++) /* memory was writeable? */ |
| if(((char *)p->scp)[i]) |
| return 0; |
| p->scp->sysbus = SYSBUSVAL; /* 1 = 8Bit-Bus, 0 = 16 Bit */ |
| if(p->scp->sysbus != SYSBUSVAL) |
| return 0; |
| |
| iscp_addr = (char *)dvma_btov((unsigned long)where); |
| |
| p->iscp = (struct iscp_struct *) iscp_addr; |
| memset((char *)p->iscp,0, sizeof(struct iscp_struct)); |
| |
| p->scp->iscp = make24(p->iscp); |
| p->iscp->busy = 1; |
| |
| sun3_reset586(); |
| sun3_attn586(); |
| DELAY(1); /* wait a while... */ |
| |
| if(p->iscp->busy) /* i82586 clears 'busy' after successful init */ |
| return 0; |
| |
| return 1; |
| } |
| |
| /****************************************************************** |
| * set iscp at the right place, called by sun3_82586_probe1 and open586. |
| */ |
| static void alloc586(struct net_device *dev) |
| { |
| struct priv *p = netdev_priv(dev); |
| |
| sun3_reset586(); |
| DELAY(1); |
| |
| p->scp = (struct scp_struct *) (p->base + SCP_DEFAULT_ADDRESS); |
| p->iscp = (struct iscp_struct *) dvma_btov(dev->mem_start); |
| p->scb = (struct scb_struct *) ((char *)p->iscp + sizeof(struct iscp_struct)); |
| |
| memset((char *) p->iscp,0,sizeof(struct iscp_struct)); |
| memset((char *) p->scp ,0,sizeof(struct scp_struct)); |
| |
| p->scp->iscp = make24(p->iscp); |
| p->scp->sysbus = SYSBUSVAL; |
| p->iscp->scb_offset = make16(p->scb); |
| p->iscp->scb_base = make24(dvma_btov(dev->mem_start)); |
| |
| p->iscp->busy = 1; |
| sun3_reset586(); |
| sun3_attn586(); |
| |
| DELAY(1); |
| |
| if(p->iscp->busy) |
| printk("%s: Init-Problems (alloc).\n",dev->name); |
| |
| p->reseted = 0; |
| |
| memset((char *)p->scb,0,sizeof(struct scb_struct)); |
| } |
| |
| struct net_device * __init sun3_82586_probe(int unit) |
| { |
| struct net_device *dev; |
| unsigned long ioaddr; |
| static int found = 0; |
| int err = -ENOMEM; |
| |
| /* check that this machine has an onboard 82586 */ |
| switch(idprom->id_machtype) { |
| case SM_SUN3|SM_3_160: |
| case SM_SUN3|SM_3_260: |
| /* these machines have 82586 */ |
| break; |
| |
| default: |
| return ERR_PTR(-ENODEV); |
| } |
| |
| if (found) |
| return ERR_PTR(-ENODEV); |
| |
| ioaddr = (unsigned long)ioremap(IE_OBIO, SUN3_82586_TOTAL_SIZE); |
| if (!ioaddr) |
| return ERR_PTR(-ENOMEM); |
| found = 1; |
| |
| dev = alloc_etherdev(sizeof(struct priv)); |
| if (!dev) |
| goto out; |
| if (unit >= 0) { |
| sprintf(dev->name, "eth%d", unit); |
| netdev_boot_setup_check(dev); |
| } |
| |
| dev->irq = IE_IRQ; |
| dev->base_addr = ioaddr; |
| err = sun3_82586_probe1(dev, ioaddr); |
| if (err) |
| goto out1; |
| err = register_netdev(dev); |
| if (err) |
| goto out2; |
| return dev; |
| |
| out2: |
| release_region(ioaddr, SUN3_82586_TOTAL_SIZE); |
| out1: |
| free_netdev(dev); |
| out: |
| iounmap((void __iomem *)ioaddr); |
| return ERR_PTR(err); |
| } |
| |
| static const struct net_device_ops sun3_82586_netdev_ops = { |
| .ndo_open = sun3_82586_open, |
| .ndo_stop = sun3_82586_close, |
| .ndo_start_xmit = sun3_82586_send_packet, |
| .ndo_set_multicast_list = set_multicast_list, |
| .ndo_tx_timeout = sun3_82586_timeout, |
| .ndo_get_stats = sun3_82586_get_stats, |
| .ndo_validate_addr = eth_validate_addr, |
| .ndo_set_mac_address = eth_mac_addr, |
| .ndo_change_mtu = eth_change_mtu, |
| }; |
| |
| static int __init sun3_82586_probe1(struct net_device *dev,int ioaddr) |
| { |
| int i, size, retval; |
| |
| if (!request_region(ioaddr, SUN3_82586_TOTAL_SIZE, DRV_NAME)) |
| return -EBUSY; |
| |
| /* copy in the ethernet address from the prom */ |
| for(i = 0; i < 6 ; i++) |
| dev->dev_addr[i] = idprom->id_ethaddr[i]; |
| |
| printk("%s: SUN3 Intel 82586 found at %lx, ",dev->name,dev->base_addr); |
| |
| /* |
| * check (or search) IO-Memory, 32K |
| */ |
| size = 0x8000; |
| |
| dev->mem_start = (unsigned long)dvma_malloc_align(0x8000, 0x1000); |
| dev->mem_end = dev->mem_start + size; |
| |
| if(size != 0x2000 && size != 0x4000 && size != 0x8000) { |
| printk("\n%s: Illegal memory size %d. Allowed is 0x2000 or 0x4000 or 0x8000 bytes.\n",dev->name,size); |
| retval = -ENODEV; |
| goto out; |
| } |
| if(!check586(dev,(char *) dev->mem_start,size)) { |
| printk("?memcheck, Can't find memory at 0x%lx with size %d!\n",dev->mem_start,size); |
| retval = -ENODEV; |
| goto out; |
| } |
| |
| ((struct priv *)netdev_priv(dev))->memtop = |
| (char *)dvma_btov(dev->mem_start); |
| ((struct priv *)netdev_priv(dev))->base = (unsigned long) dvma_btov(0); |
| alloc586(dev); |
| |
| /* set number of receive-buffs according to memsize */ |
| if(size == 0x2000) |
| ((struct priv *)netdev_priv(dev))->num_recv_buffs = |
| NUM_RECV_BUFFS_8; |
| else if(size == 0x4000) |
| ((struct priv *)netdev_priv(dev))->num_recv_buffs = |
| NUM_RECV_BUFFS_16; |
| else |
| ((struct priv *)netdev_priv(dev))->num_recv_buffs = |
| NUM_RECV_BUFFS_32; |
| |
| printk("Memaddr: 0x%lx, Memsize: %d, IRQ %d\n",dev->mem_start,size, dev->irq); |
| |
| dev->netdev_ops = &sun3_82586_netdev_ops; |
| dev->watchdog_timeo = HZ/20; |
| |
| dev->if_port = 0; |
| return 0; |
| out: |
| release_region(ioaddr, SUN3_82586_TOTAL_SIZE); |
| return retval; |
| } |
| |
| |
| static int init586(struct net_device *dev) |
| { |
| void *ptr; |
| int i,result=0; |
| struct priv *p = netdev_priv(dev); |
| volatile struct configure_cmd_struct *cfg_cmd; |
| volatile struct iasetup_cmd_struct *ias_cmd; |
| volatile struct tdr_cmd_struct *tdr_cmd; |
| volatile struct mcsetup_cmd_struct *mc_cmd; |
| struct netdev_hw_addr *ha; |
| int num_addrs=netdev_mc_count(dev); |
| |
| ptr = (void *) ((char *)p->scb + sizeof(struct scb_struct)); |
| |
| cfg_cmd = (struct configure_cmd_struct *)ptr; /* configure-command */ |
| cfg_cmd->cmd_status = 0; |
| cfg_cmd->cmd_cmd = swab16(CMD_CONFIGURE | CMD_LAST); |
| cfg_cmd->cmd_link = 0xffff; |
| |
| cfg_cmd->byte_cnt = 0x0a; /* number of cfg bytes */ |
| cfg_cmd->fifo = fifo; /* fifo-limit (8=tx:32/rx:64) */ |
| cfg_cmd->sav_bf = 0x40; /* hold or discard bad recv frames (bit 7) */ |
| cfg_cmd->adr_len = 0x2e; /* addr_len |!src_insert |pre-len |loopback */ |
| cfg_cmd->priority = 0x00; |
| cfg_cmd->ifs = 0x60; |
| cfg_cmd->time_low = 0x00; |
| cfg_cmd->time_high = 0xf2; |
| cfg_cmd->promisc = 0; |
| if(dev->flags & IFF_ALLMULTI) { |
| int len = ((char *) p->iscp - (char *) ptr - 8) / 6; |
| if(num_addrs > len) { |
| printk("%s: switching to promisc. mode\n",dev->name); |
| cfg_cmd->promisc = 1; |
| } |
| } |
| if(dev->flags&IFF_PROMISC) |
| cfg_cmd->promisc = 1; |
| cfg_cmd->carr_coll = 0x00; |
| |
| p->scb->cbl_offset = make16(cfg_cmd); |
| p->scb->cmd_ruc = 0; |
| |
| p->scb->cmd_cuc = CUC_START; /* cmd.-unit start */ |
| sun3_attn586(); |
| |
| WAIT_4_STAT_COMPL(cfg_cmd); |
| |
| if((swab16(cfg_cmd->cmd_status) & (STAT_OK|STAT_COMPL)) != (STAT_COMPL|STAT_OK)) |
| { |
| printk("%s: configure command failed: %x\n",dev->name,swab16(cfg_cmd->cmd_status)); |
| return 1; |
| } |
| |
| /* |
| * individual address setup |
| */ |
| |
| ias_cmd = (struct iasetup_cmd_struct *)ptr; |
| |
| ias_cmd->cmd_status = 0; |
| ias_cmd->cmd_cmd = swab16(CMD_IASETUP | CMD_LAST); |
| ias_cmd->cmd_link = 0xffff; |
| |
| memcpy((char *)&ias_cmd->iaddr,(char *) dev->dev_addr,ETH_ALEN); |
| |
| p->scb->cbl_offset = make16(ias_cmd); |
| |
| p->scb->cmd_cuc = CUC_START; /* cmd.-unit start */ |
| sun3_attn586(); |
| |
| WAIT_4_STAT_COMPL(ias_cmd); |
| |
| if((swab16(ias_cmd->cmd_status) & (STAT_OK|STAT_COMPL)) != (STAT_OK|STAT_COMPL)) { |
| printk("%s (82586): individual address setup command failed: %04x\n",dev->name,swab16(ias_cmd->cmd_status)); |
| return 1; |
| } |
| |
| /* |
| * TDR, wire check .. e.g. no resistor e.t.c |
| */ |
| |
| tdr_cmd = (struct tdr_cmd_struct *)ptr; |
| |
| tdr_cmd->cmd_status = 0; |
| tdr_cmd->cmd_cmd = swab16(CMD_TDR | CMD_LAST); |
| tdr_cmd->cmd_link = 0xffff; |
| tdr_cmd->status = 0; |
| |
| p->scb->cbl_offset = make16(tdr_cmd); |
| p->scb->cmd_cuc = CUC_START; /* cmd.-unit start */ |
| sun3_attn586(); |
| |
| WAIT_4_STAT_COMPL(tdr_cmd); |
| |
| if(!(swab16(tdr_cmd->cmd_status) & STAT_COMPL)) |
| { |
| printk("%s: Problems while running the TDR.\n",dev->name); |
| } |
| else |
| { |
| DELAY_16(); /* wait for result */ |
| result = swab16(tdr_cmd->status); |
| |
| p->scb->cmd_cuc = p->scb->cus & STAT_MASK; |
| sun3_attn586(); /* ack the interrupts */ |
| |
| if(result & TDR_LNK_OK) |
| ; |
| else if(result & TDR_XCVR_PRB) |
| printk("%s: TDR: Transceiver problem. Check the cable(s)!\n",dev->name); |
| else if(result & TDR_ET_OPN) |
| printk("%s: TDR: No correct termination %d clocks away.\n",dev->name,result & TDR_TIMEMASK); |
| else if(result & TDR_ET_SRT) |
| { |
| if (result & TDR_TIMEMASK) /* time == 0 -> strange :-) */ |
| printk("%s: TDR: Detected a short circuit %d clocks away.\n",dev->name,result & TDR_TIMEMASK); |
| } |
| else |
| printk("%s: TDR: Unknown status %04x\n",dev->name,result); |
| } |
| |
| /* |
| * Multicast setup |
| */ |
| if(num_addrs && !(dev->flags & IFF_PROMISC) ) |
| { |
| mc_cmd = (struct mcsetup_cmd_struct *) ptr; |
| mc_cmd->cmd_status = 0; |
| mc_cmd->cmd_cmd = swab16(CMD_MCSETUP | CMD_LAST); |
| mc_cmd->cmd_link = 0xffff; |
| mc_cmd->mc_cnt = swab16(num_addrs * 6); |
| |
| i = 0; |
| netdev_for_each_mc_addr(ha, dev) |
| memcpy((char *) mc_cmd->mc_list[i++], |
| ha->addr, ETH_ALEN); |
| |
| p->scb->cbl_offset = make16(mc_cmd); |
| p->scb->cmd_cuc = CUC_START; |
| sun3_attn586(); |
| |
| WAIT_4_STAT_COMPL(mc_cmd); |
| |
| if( (swab16(mc_cmd->cmd_status) & (STAT_COMPL|STAT_OK)) != (STAT_COMPL|STAT_OK) ) |
| printk("%s: Can't apply multicast-address-list.\n",dev->name); |
| } |
| |
| /* |
| * alloc nop/xmit-cmds |
| */ |
| #if (NUM_XMIT_BUFFS == 1) |
| for(i=0;i<2;i++) |
| { |
| p->nop_cmds[i] = (struct nop_cmd_struct *)ptr; |
| p->nop_cmds[i]->cmd_cmd = swab16(CMD_NOP); |
| p->nop_cmds[i]->cmd_status = 0; |
| p->nop_cmds[i]->cmd_link = make16((p->nop_cmds[i])); |
| ptr = (char *) ptr + sizeof(struct nop_cmd_struct); |
| } |
| #else |
| for(i=0;i<NUM_XMIT_BUFFS;i++) |
| { |
| p->nop_cmds[i] = (struct nop_cmd_struct *)ptr; |
| p->nop_cmds[i]->cmd_cmd = swab16(CMD_NOP); |
| p->nop_cmds[i]->cmd_status = 0; |
| p->nop_cmds[i]->cmd_link = make16((p->nop_cmds[i])); |
| ptr = (char *) ptr + sizeof(struct nop_cmd_struct); |
| } |
| #endif |
| |
| ptr = alloc_rfa(dev,(void *)ptr); /* init receive-frame-area */ |
| |
| /* |
| * alloc xmit-buffs / init xmit_cmds |
| */ |
| for(i=0;i<NUM_XMIT_BUFFS;i++) |
| { |
| p->xmit_cmds[i] = (struct transmit_cmd_struct *)ptr; /*transmit cmd/buff 0*/ |
| ptr = (char *) ptr + sizeof(struct transmit_cmd_struct); |
| p->xmit_cbuffs[i] = (char *)ptr; /* char-buffs */ |
| ptr = (char *) ptr + XMIT_BUFF_SIZE; |
| p->xmit_buffs[i] = (struct tbd_struct *)ptr; /* TBD */ |
| ptr = (char *) ptr + sizeof(struct tbd_struct); |
| if((void *)ptr > (void *)dev->mem_end) |
| { |
| printk("%s: not enough shared-mem for your configuration!\n",dev->name); |
| return 1; |
| } |
| memset((char *)(p->xmit_cmds[i]) ,0, sizeof(struct transmit_cmd_struct)); |
| memset((char *)(p->xmit_buffs[i]),0, sizeof(struct tbd_struct)); |
| p->xmit_cmds[i]->cmd_link = make16(p->nop_cmds[(i+1)%NUM_XMIT_BUFFS]); |
| p->xmit_cmds[i]->cmd_status = swab16(STAT_COMPL); |
| p->xmit_cmds[i]->cmd_cmd = swab16(CMD_XMIT | CMD_INT); |
| p->xmit_cmds[i]->tbd_offset = make16((p->xmit_buffs[i])); |
| p->xmit_buffs[i]->next = 0xffff; |
| p->xmit_buffs[i]->buffer = make24((p->xmit_cbuffs[i])); |
| } |
| |
| p->xmit_count = 0; |
| p->xmit_last = 0; |
| #ifndef NO_NOPCOMMANDS |
| p->nop_point = 0; |
| #endif |
| |
| /* |
| * 'start transmitter' |
| */ |
| #ifndef NO_NOPCOMMANDS |
| p->scb->cbl_offset = make16(p->nop_cmds[0]); |
| p->scb->cmd_cuc = CUC_START; |
| sun3_attn586(); |
| WAIT_4_SCB_CMD(); |
| #else |
| p->xmit_cmds[0]->cmd_link = make16(p->xmit_cmds[0]); |
| p->xmit_cmds[0]->cmd_cmd = swab16(CMD_XMIT | CMD_SUSPEND | CMD_INT); |
| #endif |
| |
| /* |
| * ack. interrupts |
| */ |
| p->scb->cmd_cuc = p->scb->cus & STAT_MASK; |
| sun3_attn586(); |
| DELAY_16(); |
| |
| sun3_enaint(); |
| sun3_active(); |
| |
| return 0; |
| } |
| |
| /****************************************************** |
| * This is a helper routine for sun3_82586_rnr_int() and init586(). |
| * It sets up the Receive Frame Area (RFA). |
| */ |
| |
| static void *alloc_rfa(struct net_device *dev,void *ptr) |
| { |
| volatile struct rfd_struct *rfd = (struct rfd_struct *)ptr; |
| volatile struct rbd_struct *rbd; |
| int i; |
| struct priv *p = netdev_priv(dev); |
| |
| memset((char *) rfd,0,sizeof(struct rfd_struct)*(p->num_recv_buffs+rfdadd)); |
| p->rfd_first = rfd; |
| |
| for(i = 0; i < (p->num_recv_buffs+rfdadd); i++) { |
| rfd[i].next = make16(rfd + (i+1) % (p->num_recv_buffs+rfdadd) ); |
| rfd[i].rbd_offset = 0xffff; |
| } |
| rfd[p->num_recv_buffs-1+rfdadd].last = RFD_SUSP; /* RU suspend */ |
| |
| ptr = (void *) (rfd + (p->num_recv_buffs + rfdadd) ); |
| |
| rbd = (struct rbd_struct *) ptr; |
| ptr = (void *) (rbd + p->num_recv_buffs); |
| |
| /* clr descriptors */ |
| memset((char *) rbd,0,sizeof(struct rbd_struct)*(p->num_recv_buffs)); |
| |
| for(i=0;i<p->num_recv_buffs;i++) |
| { |
| rbd[i].next = make16((rbd + (i+1) % p->num_recv_buffs)); |
| rbd[i].size = swab16(RECV_BUFF_SIZE); |
| rbd[i].buffer = make24(ptr); |
| ptr = (char *) ptr + RECV_BUFF_SIZE; |
| } |
| |
| p->rfd_top = p->rfd_first; |
| p->rfd_last = p->rfd_first + (p->num_recv_buffs - 1 + rfdadd); |
| |
| p->scb->rfa_offset = make16(p->rfd_first); |
| p->rfd_first->rbd_offset = make16(rbd); |
| |
| return ptr; |
| } |
| |
| |
| /************************************************** |
| * Interrupt Handler ... |
| */ |
| |
| static irqreturn_t sun3_82586_interrupt(int irq,void *dev_id) |
| { |
| struct net_device *dev = dev_id; |
| unsigned short stat; |
| int cnt=0; |
| struct priv *p; |
| |
| if (!dev) { |
| printk ("sun3_82586-interrupt: irq %d for unknown device.\n",irq); |
| return IRQ_NONE; |
| } |
| p = netdev_priv(dev); |
| |
| if(debuglevel > 1) |
| printk("I"); |
| |
| WAIT_4_SCB_CMD(); /* wait for last command */ |
| |
| while((stat=p->scb->cus & STAT_MASK)) |
| { |
| p->scb->cmd_cuc = stat; |
| sun3_attn586(); |
| |
| if(stat & STAT_FR) /* received a frame */ |
| sun3_82586_rcv_int(dev); |
| |
| if(stat & STAT_RNR) /* RU went 'not ready' */ |
| { |
| printk("(R)"); |
| if(p->scb->rus & RU_SUSPEND) /* special case: RU_SUSPEND */ |
| { |
| WAIT_4_SCB_CMD(); |
| p->scb->cmd_ruc = RUC_RESUME; |
| sun3_attn586(); |
| WAIT_4_SCB_CMD_RUC(); |
| } |
| else |
| { |
| printk("%s: Receiver-Unit went 'NOT READY': %04x/%02x.\n",dev->name,(int) stat,(int) p->scb->rus); |
| sun3_82586_rnr_int(dev); |
| } |
| } |
| |
| if(stat & STAT_CX) /* command with I-bit set complete */ |
| sun3_82586_xmt_int(dev); |
| |
| #ifndef NO_NOPCOMMANDS |
| if(stat & STAT_CNA) /* CU went 'not ready' */ |
| { |
| if(netif_running(dev)) |
| printk("%s: oops! CU has left active state. stat: %04x/%02x.\n",dev->name,(int) stat,(int) p->scb->cus); |
| } |
| #endif |
| |
| if(debuglevel > 1) |
| printk("%d",cnt++); |
| |
| WAIT_4_SCB_CMD(); /* wait for ack. (sun3_82586_xmt_int can be faster than ack!!) */ |
| if(p->scb->cmd_cuc) /* timed out? */ |
| { |
| printk("%s: Acknowledge timed out.\n",dev->name); |
| sun3_disint(); |
| break; |
| } |
| } |
| |
| if(debuglevel > 1) |
| printk("i"); |
| return IRQ_HANDLED; |
| } |
| |
| /******************************************************* |
| * receive-interrupt |
| */ |
| |
| static void sun3_82586_rcv_int(struct net_device *dev) |
| { |
| int status,cnt=0; |
| unsigned short totlen; |
| struct sk_buff *skb; |
| struct rbd_struct *rbd; |
| struct priv *p = netdev_priv(dev); |
| |
| if(debuglevel > 0) |
| printk("R"); |
| |
| for(;(status = p->rfd_top->stat_high) & RFD_COMPL;) |
| { |
| rbd = (struct rbd_struct *) make32(p->rfd_top->rbd_offset); |
| |
| if(status & RFD_OK) /* frame received without error? */ |
| { |
| if( (totlen = swab16(rbd->status)) & RBD_LAST) /* the first and the last buffer? */ |
| { |
| totlen &= RBD_MASK; /* length of this frame */ |
| rbd->status = 0; |
| skb = (struct sk_buff *) dev_alloc_skb(totlen+2); |
| if(skb != NULL) |
| { |
| skb_reserve(skb,2); |
| skb_put(skb,totlen); |
| skb_copy_to_linear_data(skb,(char *) p->base+swab32((unsigned long) rbd->buffer),totlen); |
| skb->protocol=eth_type_trans(skb,dev); |
| netif_rx(skb); |
| p->stats.rx_packets++; |
| } |
| else |
| p->stats.rx_dropped++; |
| } |
| else |
| { |
| int rstat; |
| /* free all RBD's until RBD_LAST is set */ |
| totlen = 0; |
| while(!((rstat=swab16(rbd->status)) & RBD_LAST)) |
| { |
| totlen += rstat & RBD_MASK; |
| if(!rstat) |
| { |
| printk("%s: Whoops .. no end mark in RBD list\n",dev->name); |
| break; |
| } |
| rbd->status = 0; |
| rbd = (struct rbd_struct *) make32(rbd->next); |
| } |
| totlen += rstat & RBD_MASK; |
| rbd->status = 0; |
| printk("%s: received oversized frame! length: %d\n",dev->name,totlen); |
| p->stats.rx_dropped++; |
| } |
| } |
| else /* frame !(ok), only with 'save-bad-frames' */ |
| { |
| printk("%s: oops! rfd-error-status: %04x\n",dev->name,status); |
| p->stats.rx_errors++; |
| } |
| p->rfd_top->stat_high = 0; |
| p->rfd_top->last = RFD_SUSP; /* maybe exchange by RFD_LAST */ |
| p->rfd_top->rbd_offset = 0xffff; |
| p->rfd_last->last = 0; /* delete RFD_SUSP */ |
| p->rfd_last = p->rfd_top; |
| p->rfd_top = (struct rfd_struct *) make32(p->rfd_top->next); /* step to next RFD */ |
| p->scb->rfa_offset = make16(p->rfd_top); |
| |
| if(debuglevel > 0) |
| printk("%d",cnt++); |
| } |
| |
| if(automatic_resume) |
| { |
| WAIT_4_SCB_CMD(); |
| p->scb->cmd_ruc = RUC_RESUME; |
| sun3_attn586(); |
| WAIT_4_SCB_CMD_RUC(); |
| } |
| |
| #ifdef WAIT_4_BUSY |
| { |
| int i; |
| for(i=0;i<1024;i++) |
| { |
| if(p->rfd_top->status) |
| break; |
| DELAY_16(); |
| if(i == 1023) |
| printk("%s: RU hasn't fetched next RFD (not busy/complete)\n",dev->name); |
| } |
| } |
| #endif |
| |
| #if 0 |
| if(!at_least_one) |
| { |
| int i; |
| volatile struct rfd_struct *rfds=p->rfd_top; |
| volatile struct rbd_struct *rbds; |
| printk("%s: received a FC intr. without having a frame: %04x %d\n",dev->name,status,old_at_least); |
| for(i=0;i< (p->num_recv_buffs+4);i++) |
| { |
| rbds = (struct rbd_struct *) make32(rfds->rbd_offset); |
| printk("%04x:%04x ",rfds->status,rbds->status); |
| rfds = (struct rfd_struct *) make32(rfds->next); |
| } |
| printk("\nerrs: %04x %04x stat: %04x\n",(int)p->scb->rsc_errs,(int)p->scb->ovrn_errs,(int)p->scb->status); |
| printk("\nerrs: %04x %04x rus: %02x, cus: %02x\n",(int)p->scb->rsc_errs,(int)p->scb->ovrn_errs,(int)p->scb->rus,(int)p->scb->cus); |
| } |
| old_at_least = at_least_one; |
| #endif |
| |
| if(debuglevel > 0) |
| printk("r"); |
| } |
| |
| /********************************************************** |
| * handle 'Receiver went not ready'. |
| */ |
| |
| static void sun3_82586_rnr_int(struct net_device *dev) |
| { |
| struct priv *p = netdev_priv(dev); |
| |
| p->stats.rx_errors++; |
| |
| WAIT_4_SCB_CMD(); /* wait for the last cmd, WAIT_4_FULLSTAT?? */ |
| p->scb->cmd_ruc = RUC_ABORT; /* usually the RU is in the 'no resource'-state .. abort it now. */ |
| sun3_attn586(); |
| WAIT_4_SCB_CMD_RUC(); /* wait for accept cmd. */ |
| |
| alloc_rfa(dev,(char *)p->rfd_first); |
| /* maybe add a check here, before restarting the RU */ |
| startrecv586(dev); /* restart RU */ |
| |
| printk("%s: Receive-Unit restarted. Status: %04x\n",dev->name,p->scb->rus); |
| |
| } |
| |
| /********************************************************** |
| * handle xmit - interrupt |
| */ |
| |
| static void sun3_82586_xmt_int(struct net_device *dev) |
| { |
| int status; |
| struct priv *p = netdev_priv(dev); |
| |
| if(debuglevel > 0) |
| printk("X"); |
| |
| status = swab16(p->xmit_cmds[p->xmit_last]->cmd_status); |
| if(!(status & STAT_COMPL)) |
| printk("%s: strange .. xmit-int without a 'COMPLETE'\n",dev->name); |
| |
| if(status & STAT_OK) |
| { |
| p->stats.tx_packets++; |
| p->stats.collisions += (status & TCMD_MAXCOLLMASK); |
| } |
| else |
| { |
| p->stats.tx_errors++; |
| if(status & TCMD_LATECOLL) { |
| printk("%s: late collision detected.\n",dev->name); |
| p->stats.collisions++; |
| } |
| else if(status & TCMD_NOCARRIER) { |
| p->stats.tx_carrier_errors++; |
| printk("%s: no carrier detected.\n",dev->name); |
| } |
| else if(status & TCMD_LOSTCTS) |
| printk("%s: loss of CTS detected.\n",dev->name); |
| else if(status & TCMD_UNDERRUN) { |
| p->stats.tx_fifo_errors++; |
| printk("%s: DMA underrun detected.\n",dev->name); |
| } |
| else if(status & TCMD_MAXCOLL) { |
| printk("%s: Max. collisions exceeded.\n",dev->name); |
| p->stats.collisions += 16; |
| } |
| } |
| |
| #if (NUM_XMIT_BUFFS > 1) |
| if( (++p->xmit_last) == NUM_XMIT_BUFFS) |
| p->xmit_last = 0; |
| #endif |
| netif_wake_queue(dev); |
| } |
| |
| /*********************************************************** |
| * (re)start the receiver |
| */ |
| |
| static void startrecv586(struct net_device *dev) |
| { |
| struct priv *p = netdev_priv(dev); |
| |
| WAIT_4_SCB_CMD(); |
| WAIT_4_SCB_CMD_RUC(); |
| p->scb->rfa_offset = make16(p->rfd_first); |
| p->scb->cmd_ruc = RUC_START; |
| sun3_attn586(); /* start cmd. */ |
| WAIT_4_SCB_CMD_RUC(); /* wait for accept cmd. (no timeout!!) */ |
| } |
| |
| static void sun3_82586_timeout(struct net_device *dev) |
| { |
| struct priv *p = netdev_priv(dev); |
| #ifndef NO_NOPCOMMANDS |
| if(p->scb->cus & CU_ACTIVE) /* COMMAND-UNIT active? */ |
| { |
| netif_wake_queue(dev); |
| #ifdef DEBUG |
| printk("%s: strange ... timeout with CU active?!?\n",dev->name); |
| printk("%s: X0: %04x N0: %04x N1: %04x %d\n",dev->name,(int)swab16(p->xmit_cmds[0]->cmd_status),(int)swab16(p->nop_cmds[0]->cmd_status),(int)swab16(p->nop_cmds[1]->cmd_status),(int)p->nop_point); |
| #endif |
| p->scb->cmd_cuc = CUC_ABORT; |
| sun3_attn586(); |
| WAIT_4_SCB_CMD(); |
| p->scb->cbl_offset = make16(p->nop_cmds[p->nop_point]); |
| p->scb->cmd_cuc = CUC_START; |
| sun3_attn586(); |
| WAIT_4_SCB_CMD(); |
| dev->trans_start = jiffies; |
| return 0; |
| } |
| #endif |
| { |
| #ifdef DEBUG |
| printk("%s: xmitter timed out, try to restart! stat: %02x\n",dev->name,p->scb->cus); |
| printk("%s: command-stats: %04x %04x\n",dev->name,swab16(p->xmit_cmds[0]->cmd_status),swab16(p->xmit_cmds[1]->cmd_status)); |
| printk("%s: check, whether you set the right interrupt number!\n",dev->name); |
| #endif |
| sun3_82586_close(dev); |
| sun3_82586_open(dev); |
| } |
| dev->trans_start = jiffies; |
| } |
| |
| /****************************************************** |
| * send frame |
| */ |
| |
| static int sun3_82586_send_packet(struct sk_buff *skb, struct net_device *dev) |
| { |
| int len,i; |
| #ifndef NO_NOPCOMMANDS |
| int next_nop; |
| #endif |
| struct priv *p = netdev_priv(dev); |
| |
| if(skb->len > XMIT_BUFF_SIZE) |
| { |
| printk("%s: Sorry, max. framelength is %d bytes. The length of your frame is %d bytes.\n",dev->name,XMIT_BUFF_SIZE,skb->len); |
| return NETDEV_TX_OK; |
| } |
| |
| netif_stop_queue(dev); |
| |
| #if(NUM_XMIT_BUFFS > 1) |
| if(test_and_set_bit(0,(void *) &p->lock)) { |
| printk("%s: Queue was locked\n",dev->name); |
| return NETDEV_TX_BUSY; |
| } |
| else |
| #endif |
| { |
| len = skb->len; |
| if (len < ETH_ZLEN) { |
| memset((void *)p->xmit_cbuffs[p->xmit_count], 0, |
| ETH_ZLEN); |
| len = ETH_ZLEN; |
| } |
| skb_copy_from_linear_data(skb, (void *)p->xmit_cbuffs[p->xmit_count], skb->len); |
| |
| #if (NUM_XMIT_BUFFS == 1) |
| # ifdef NO_NOPCOMMANDS |
| |
| #ifdef DEBUG |
| if(p->scb->cus & CU_ACTIVE) |
| { |
| printk("%s: Hmmm .. CU is still running and we wanna send a new packet.\n",dev->name); |
| printk("%s: stat: %04x %04x\n",dev->name,p->scb->cus,swab16(p->xmit_cmds[0]->cmd_status)); |
| } |
| #endif |
| |
| p->xmit_buffs[0]->size = swab16(TBD_LAST | len); |
| for(i=0;i<16;i++) |
| { |
| p->xmit_cmds[0]->cmd_status = 0; |
| WAIT_4_SCB_CMD(); |
| if( (p->scb->cus & CU_STATUS) == CU_SUSPEND) |
| p->scb->cmd_cuc = CUC_RESUME; |
| else |
| { |
| p->scb->cbl_offset = make16(p->xmit_cmds[0]); |
| p->scb->cmd_cuc = CUC_START; |
| } |
| |
| sun3_attn586(); |
| dev->trans_start = jiffies; |
| if(!i) |
| dev_kfree_skb(skb); |
| WAIT_4_SCB_CMD(); |
| if( (p->scb->cus & CU_ACTIVE)) /* test it, because CU sometimes doesn't start immediately */ |
| break; |
| if(p->xmit_cmds[0]->cmd_status) |
| break; |
| if(i==15) |
| printk("%s: Can't start transmit-command.\n",dev->name); |
| } |
| # else |
| next_nop = (p->nop_point + 1) & 0x1; |
| p->xmit_buffs[0]->size = swab16(TBD_LAST | len); |
| |
| p->xmit_cmds[0]->cmd_link = p->nop_cmds[next_nop]->cmd_link |
| = make16((p->nop_cmds[next_nop])); |
| p->xmit_cmds[0]->cmd_status = p->nop_cmds[next_nop]->cmd_status = 0; |
| |
| p->nop_cmds[p->nop_point]->cmd_link = make16((p->xmit_cmds[0])); |
| dev->trans_start = jiffies; |
| p->nop_point = next_nop; |
| dev_kfree_skb(skb); |
| # endif |
| #else |
| p->xmit_buffs[p->xmit_count]->size = swab16(TBD_LAST | len); |
| if( (next_nop = p->xmit_count + 1) == NUM_XMIT_BUFFS ) |
| next_nop = 0; |
| |
| p->xmit_cmds[p->xmit_count]->cmd_status = 0; |
| /* linkpointer of xmit-command already points to next nop cmd */ |
| p->nop_cmds[next_nop]->cmd_link = make16((p->nop_cmds[next_nop])); |
| p->nop_cmds[next_nop]->cmd_status = 0; |
| |
| p->nop_cmds[p->xmit_count]->cmd_link = make16((p->xmit_cmds[p->xmit_count])); |
| dev->trans_start = jiffies; |
| p->xmit_count = next_nop; |
| |
| { |
| unsigned long flags; |
| local_irq_save(flags); |
| if(p->xmit_count != p->xmit_last) |
| netif_wake_queue(dev); |
| p->lock = 0; |
| local_irq_restore(flags); |
| } |
| dev_kfree_skb(skb); |
| #endif |
| } |
| return NETDEV_TX_OK; |
| } |
| |
| /******************************************* |
| * Someone wanna have the statistics |
| */ |
| |
| static struct net_device_stats *sun3_82586_get_stats(struct net_device *dev) |
| { |
| struct priv *p = netdev_priv(dev); |
| unsigned short crc,aln,rsc,ovrn; |
| |
| crc = swab16(p->scb->crc_errs); /* get error-statistic from the ni82586 */ |
| p->scb->crc_errs = 0; |
| aln = swab16(p->scb->aln_errs); |
| p->scb->aln_errs = 0; |
| rsc = swab16(p->scb->rsc_errs); |
| p->scb->rsc_errs = 0; |
| ovrn = swab16(p->scb->ovrn_errs); |
| p->scb->ovrn_errs = 0; |
| |
| p->stats.rx_crc_errors += crc; |
| p->stats.rx_fifo_errors += ovrn; |
| p->stats.rx_frame_errors += aln; |
| p->stats.rx_dropped += rsc; |
| |
| return &p->stats; |
| } |
| |
| /******************************************************** |
| * Set MC list .. |
| */ |
| |
| static void set_multicast_list(struct net_device *dev) |
| { |
| netif_stop_queue(dev); |
| sun3_disint(); |
| alloc586(dev); |
| init586(dev); |
| startrecv586(dev); |
| sun3_enaint(); |
| netif_wake_queue(dev); |
| } |
| |
| #ifdef MODULE |
| #error This code is not currently supported as a module |
| static struct net_device *dev_sun3_82586; |
| |
| int init_module(void) |
| { |
| dev_sun3_82586 = sun3_82586_probe(-1); |
| if (IS_ERR(dev_sun3_82586)) |
| return PTR_ERR(dev_sun3_82586); |
| return 0; |
| } |
| |
| void cleanup_module(void) |
| { |
| unsigned long ioaddr = dev_sun3_82586->base_addr; |
| unregister_netdev(dev_sun3_82586); |
| release_region(ioaddr, SUN3_82586_TOTAL_SIZE); |
| iounmap((void *)ioaddr); |
| free_netdev(dev_sun3_82586); |
| } |
| #endif /* MODULE */ |
| |
| #if 0 |
| /* |
| * DUMP .. we expect a not running CMD unit and enough space |
| */ |
| void sun3_82586_dump(struct net_device *dev,void *ptr) |
| { |
| struct priv *p = netdev_priv(dev); |
| struct dump_cmd_struct *dump_cmd = (struct dump_cmd_struct *) ptr; |
| int i; |
| |
| p->scb->cmd_cuc = CUC_ABORT; |
| sun3_attn586(); |
| WAIT_4_SCB_CMD(); |
| WAIT_4_SCB_CMD_RUC(); |
| |
| dump_cmd->cmd_status = 0; |
| dump_cmd->cmd_cmd = CMD_DUMP | CMD_LAST; |
| dump_cmd->dump_offset = make16((dump_cmd + 1)); |
| dump_cmd->cmd_link = 0xffff; |
| |
| p->scb->cbl_offset = make16(dump_cmd); |
| p->scb->cmd_cuc = CUC_START; |
| sun3_attn586(); |
| WAIT_4_STAT_COMPL(dump_cmd); |
| |
| if( (dump_cmd->cmd_status & (STAT_COMPL|STAT_OK)) != (STAT_COMPL|STAT_OK) ) |
| printk("%s: Can't get dump information.\n",dev->name); |
| |
| for(i=0;i<170;i++) { |
| printk("%02x ",(int) ((unsigned char *) (dump_cmd + 1))[i]); |
| if(i % 24 == 23) |
| printk("\n"); |
| } |
| printk("\n"); |
| } |
| #endif |
| |
| MODULE_LICENSE("GPL"); |