/* * 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/slab.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 = /* (struct priv *) dev->priv*/ &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 = (struct priv *) dev->priv; 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); } SET_MODULE_OWNER(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 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 *) (dev->priv))->memtop = (char *)dvma_btov(dev->mem_start); ((struct priv *) (dev->priv))->base = (unsigned long) dvma_btov(0); alloc586(dev); /* set number of receive-buffs according to memsize */ if(size == 0x2000) ((struct priv *) dev->priv)->num_recv_buffs = NUM_RECV_BUFFS_8; else if(size == 0x4000) ((struct priv *) dev->priv)->num_recv_buffs = NUM_RECV_BUFFS_16; else ((struct priv *) dev->priv)->num_recv_buffs = NUM_RECV_BUFFS_32; printk("Memaddr: 0x%lx, Memsize: %d, IRQ %d\n",dev->mem_start,size, dev->irq); dev->open = sun3_82586_open; dev->stop = sun3_82586_close; dev->get_stats = sun3_82586_get_stats; dev->tx_timeout = sun3_82586_timeout; dev->watchdog_timeo = HZ/20; dev->hard_start_xmit = sun3_82586_send_packet; dev->set_multicast_list = set_multicast_list; 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 = (struct priv *) dev->priv; 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 dev_mc_list *dmi=dev->mc_list; int num_addrs=dev->mc_count; 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); dev->flags|=IFF_PROMISC; } } if(dev->flags&IFF_PROMISC) { cfg_cmd->promisc=1; dev->flags|=IFF_PROMISC; } 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); for(i=0;i<num_addrs;i++,dmi=dmi->next) memcpy((char *) mc_cmd->mc_list[i], dmi->dmi_addr,6); 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 = (struct priv *) dev->priv; 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 = (struct priv *) dev->priv; 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 = (struct priv *) dev->priv; 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); eth_copy_and_sum(skb,(char *) p->base+swab32((unsigned long) rbd->buffer),totlen,0); 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 = (struct priv *) dev->priv; 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 = (struct priv *) dev->priv; 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 = (struct priv *) dev->priv; 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 = (struct priv *) dev->priv; #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 = (struct priv *) dev->priv; 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 0; } 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 1; } else #endif { len = skb->len; if (len < ETH_ZLEN) { memset((char *)p->xmit_cbuffs[p->xmit_count], 0, ETH_ZLEN); len = ETH_ZLEN; } memcpy((char *)p->xmit_cbuffs[p->xmit_count],(char *)(skb->data),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 0; } /******************************************* * Someone wanna have the statistics */ static struct net_device_stats *sun3_82586_get_stats(struct net_device *dev) { struct priv *p = (struct priv *) dev->priv; 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 = (struct priv *) dev->priv; 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");