/* * 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 0.51 (94/08/19) for Linux 1.1.47 (or later) * Copyrights (c) 1994 by Michael Hipp (mhipp@student.uni-tuebingen.de) * [feel free to mail ....] * * CAN YOU PLEASE REPORT ME YOUR PERFORMANCE EXPERIENCES !!. * * autoprobe for: base_addr: 0x300,0x280,0x360,0x320,0x340 * mem_start: 0xd0000,0xd4000,0xd8000 (8K and 16K) * * sources: * skeleton.c from Donald Becker * * I have also done a look in the following sources: (mail me if you need them) * crynwr-packet-driver by Russ Nelson * Garret A. Wollman's (fourth) i82586-driver for BSD * (before getting an i82596 manual, the existing drivers helped * me a lot to understand this tricky chip.) * * Known Bugs: * The internal sysbus seems to be slow. So we often lose packets because of * overruns while receiving from a fast remote host. * This can slow down TCP connections. Maybe the newer ni5210 cards are better. */ /* * 19.Aug.94: changed request_irq() parameter (MH) * * 20.July.94: removed cleanup bugs, removed a 16K-mem-probe-bug (MH) * * 19.July.94: lotsa cleanups .. (MH) * * 17.July.94: some patches ... verified to run with 1.1.29 (MH) * * 4.July.94: patches for Linux 1.1.24 (MH) * * 26.March.94: patches for Linux 1.0 and iomem-auto-probe (MH) * * 30.Sep.93: Added nop-chain .. driver now runs with only one Xmit-Buff, too (MH) */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "ni52.h" #define DEBUG /* debug on */ /* #define DEBUG1 #define DEBUG2 #define DEBUG3 */ #define SYSBUSVAL 1 #define ni_attn586() {outb(0,dev->base_addr+NI52_ATTENTION);} #define ni_reset586() {outb(0,dev->base_addr+NI52_RESET);} #define make32(ptr16) (p->memtop + (short) (ptr16) ) #define make24(ptr32) ((char *) (ptr32) - p->base) #define make16(ptr32) ((unsigned short) ((unsigned long) (ptr32) - (unsigned long) p->memtop )) /******************* how to calc the buffers ***************************** IMPORTANT NOTE: if you configure only one NUM_XMIT_BUFFS, do also a --------------- #define ONLY_ONE_XMIT_BUF btw: it seems, that only the ONLY_ONE_XMIT_BUF Mode is stable 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; examples: --------- ->cfg1: NUM_RECV_FRAMES=16, NUM_RECV_BUFFS=48, RECV_BUFF_SIZE=256, NUM_XMIT_BUFFS=2 ,XMIT_BUFF_SIZE=1514 NUM_RECV_FRAMES * sizeof(rfd) = 384; NUM_RECV_BUFFS * ( sizeof(rbd) + RECV_BUFF_SIZE) = 12864 NUM_XMIT_BUFFS * ( sizeof(tbd+transmit_cmd+nop_cmd) + XMIT_BUFF_SIZE) = 3092 INIT = 36 -------------------- 16358 (36 bytes left!) ************************ ->cfg2: NUM_RECV_FRAMES=9, NUM_RECV_BUFFS=18, RECV_BUFF_SIZE=256, NUM_XMIT_BUFFS=2 ,XMIT_BUFF_SIZE=1514 NUM_RECV_FRAMES * sizeof(rfd) = 216 NUM_RECV_BUFFS * ( sizeof(rbd) + RECV_BUFF_SIZE) = 4824 NUM_XMIT_BUFFS * ( sizeof(tbd+transmit_cmd+nop_cmd) + XMIT_BUFF_SIZE) = 3092 INIT = 36 ------------------ 8180 (24 bytes left!) ->cfg3: NUM_RECV_FRAMES=7, NUM_RECV_BUFFS=24, RECV_BUFF_SIZE=256, NUM_XMIT_BUFFS=1, XMIT_BUFF_SIZE=1514 168 + 6432 + 1538 + 36 + 16 = 8190 ***************************************************************************/ #if 0 /* config-1 for 16Kram card */ # define NUM_RECV_FRAMES 16 /* number of frames to allow for receive */ # define NUM_RECV_BUFFS 48 /* number of buffers to allocate */ # define RECV_BUFF_SIZE 256 /* size of each buffer, POWER OF 2 & EVEN*/ # define XMIT_BUFF_SIZE 1514 /* length of transmit buffer (EVEN) */ # define NUM_XMIT_BUFFS 2 /* number of Xmit-Buffs */ #elif 0 /* config-2 for 8Kram card */ # define NUM_RECV_FRAMES 9 # define NUM_RECV_BUFFS 18 # define RECV_BUFF_SIZE 256 # define XMIT_BUFF_SIZE 1514 # define NUM_XMIT_BUFFS 2 #elif 1 /* * config-3 for 8Kram card ___use_this_config____ seems to be stable */ # define NUM_RECV_FRAMES 7 # define NUM_RECV_BUFFS 24 # define RECV_BUFF_SIZE 256 # define XMIT_BUFF_SIZE 1514 # define NUM_XMIT_BUFFS 1 # define ONLY_ONE_XMIT_BUF # define NO_NOPCOMMANDS #elif 0 /* * cfg-4 for 16K, ONLY_ONE_XMIT_BUF */ # define NUM_RECV_FRAMES 20 # define NUM_RECV_BUFFS 27 # define RECV_BUFF_SIZE 512 # define XMIT_BUFF_SIZE 1514 # define NUM_XMIT_BUFFS 1 # define ONLY_ONE_XMIT_BUF #else # define NUM_RECV_FRAMES 4 # define NUM_RECV_BUFFS 4 # define RECV_BUFF_SIZE 1536 # define XMIT_BUFF_SIZE 1536 # define NUM_XMIT_BUFFS 1 # define ONLY_ONE_XMIT_BUF # define NO_NOPCOMMANDS #endif #define DELAY(x) {int i=jiffies; \ if(loops_per_sec == 1) \ while(i+(x)>jiffies); \ else \ __delay((loops_per_sec>>5)*x); \ } extern void autoirq_setup(int waittime); extern int autoirq_report(int waittime); extern void *irq2dev_map[16]; #ifndef HAVE_PORTRESERVE #define check_region(ioaddr, size) 0 #define snarf_region(ioaddr, size); do ; while (0) #endif #define NI52_TOTAL_SIZE 16 #define NI52_ADDR0 0x02 #define NI52_ADDR1 0x07 #define NI52_ADDR2 0x01 static int ni52_probe1(struct device *dev,int ioaddr); static void ni52_interrupt(int reg_ptr); static int ni52_open(struct device *dev); static int ni52_close(struct device *dev); static int ni52_send_packet(struct sk_buff *,struct device *); static struct enet_statistics *ni52_get_stats(struct device *dev); static void set_multicast_list(struct device *dev, int num_addrs, void *addrs); /* helper-functions */ static int init586(struct device *dev); static int check586(struct device *dev,char *where,unsigned size); static void alloc586(struct device *dev); static void startrecv586(struct device *dev); static void *alloc_rfa(struct device *dev,void *ptr); static void ni52_rcv_int(struct device *dev); static void ni52_xmt_int(struct device *dev); static void ni52_rnr_int(struct device *dev); struct priv { struct enet_statistics stats; unsigned long base; char *memtop,*max_cbuff32,*min_cbuff32,*max_cbuff24; volatile struct rbd_struct *rbd_last; 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]; #ifdef ONLY_ONE_XMIT_BUF volatile struct nop_cmd_struct *nop_cmds[2]; #else volatile struct nop_cmd_struct *nop_cmds[NUM_XMIT_BUFFS]; #endif volatile int nop_point; volatile char *xmit_cbuffs[NUM_XMIT_BUFFS]; volatile int xmit_count,xmit_last; }; /********************************************** * close device */ static int ni52_close(struct device *dev) { free_irq(dev->irq); irq2dev_map[dev->irq] = 0; ni_reset586(); /* the hard way to stop the receiver */ dev->start = 0; dev->tbusy = 0; return 0; } /********************************************** * open device */ static int ni52_open(struct device *dev) { alloc586(dev); init586(dev); startrecv586(dev); if(request_irq(dev->irq, &ni52_interrupt,0,"ni52")) { ni_reset586(); return -EAGAIN; } irq2dev_map[dev->irq] = dev; dev->interrupt = 0; dev->tbusy = 0; dev->start = 1; return 0; /* most done by init */ } /********************************************** * Check to see if there's an 82586 out there. */ static int check586(struct device *dev,char *where,unsigned size) { struct priv *p = (struct priv *) dev->priv; char *iscp_addrs[2]; int i; p->base = (unsigned long) where + size - 0x01000000; p->memtop = where + size; p->scp = (struct scp_struct *)(p->base + SCP_DEFAULT_ADDRESS); memset((char *)p->scp,0, sizeof(struct scp_struct)); p->scp->sysbus = SYSBUSVAL; /* 1 = 8Bit-Bus */ iscp_addrs[0] = where; iscp_addrs[1]= (char *) p->scp - sizeof(struct iscp_struct); for(i=0;i<2;i++) { p->iscp = (struct iscp_struct *) iscp_addrs[i]; memset((char *)p->iscp,0, sizeof(struct iscp_struct)); p->scp->iscp = make24(p->iscp); p->iscp->busy = 1; ni_reset586(); ni_attn586(); DELAY(2); /* wait a while... */ if(p->iscp->busy) return 0; } return 1; } /****************************************************************** * set iscp at the right place, called by ni52_probe1 and open586. */ void alloc586(struct device *dev) { struct priv *p = (struct priv *) dev->priv; p->scp = (struct scp_struct *) (p->base + SCP_DEFAULT_ADDRESS); p->scb = (struct scb_struct *) (dev->mem_start); p->iscp = (struct iscp_struct *) ((char *)p->scp - 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->busy = 1; ni_reset586(); ni_attn586(); #ifdef DEBUG DELAY(2); if(p->iscp->busy) printk("%s: Init-Problems (alloc).\n",dev->name); #endif memset((char *)p->scb,0,sizeof(struct scb_struct)); } /********************************************** * probe the ni5210-card */ int ni52_probe(struct device *dev) { int *port, ports[] = {0x300, 0x280, 0x360 , 0x320 , 0x340, 0}; int base_addr = dev->base_addr; if (base_addr > 0x1ff) /* Check a single specified location. */ if( (inb(base_addr+NI52_MAGIC1) == NI52_MAGICVAL1) && (inb(base_addr+NI52_MAGIC2) == NI52_MAGICVAL2)) return ni52_probe1(dev, base_addr); else if (base_addr > 0) /* Don't probe at all. */ return ENXIO; for (port = ports; *port; port++) { int ioaddr = *port; if (check_region(ioaddr, NI52_TOTAL_SIZE)) continue; if( !(inb(ioaddr+NI52_MAGIC1) == NI52_MAGICVAL1) || !(inb(ioaddr+NI52_MAGIC2) == NI52_MAGICVAL2)) continue; dev->base_addr = ioaddr; if (ni52_probe1(dev, ioaddr) == 0) return 0; } dev->base_addr = base_addr; return ENODEV; } static int ni52_probe1(struct device *dev,int ioaddr) { long memaddrs[] = { 0xd0000,0xd2000,0xd4000,0xd6000,0xd8000, 0 }; int i,size; for(i=0;idev_addr[i] = inb(dev->base_addr+i); if(dev->dev_addr[0] != NI52_ADDR0 || dev->dev_addr[1] != NI52_ADDR1 || dev->dev_addr[2] != NI52_ADDR2) return ENODEV; printk("%s: Ni52 found at %#3x, ",dev->name,dev->base_addr); snarf_region(ioaddr,NI52_TOTAL_SIZE); dev->priv = (void *) kmalloc(sizeof(struct priv),GFP_KERNEL); /* warning: we don't free it on errors */ memset((char *) dev->priv,0,sizeof(struct priv)); /* * check (or search) IO-Memory, 8K and 16K */ if(dev->mem_start != 0) /* no auto-mem-probe */ { size = 0x4000; if(!check586(dev,(char *) dev->mem_start,size)) { size = 0x2000; if(!check586(dev,(char *) dev->mem_start,size)) { printk("?memprobe, Can't find memory at 0x%lx!\n",dev->mem_start); return ENODEV; } } } else { for(i=0;;i++) { if(!memaddrs[i]) { printk("?memprobe, Can't find io-memory!\n"); return ENODEV; } dev->mem_start = memaddrs[i]; size = 0x2000; if(check586(dev,(char *)dev->mem_start,size)) /* 8K-check */ break; size = 0x4000; if(check586(dev,(char *)dev->mem_start,size)) /* 16K-check */ break; } } ((struct priv *) (dev->priv))->base = dev->mem_start + size - 0x01000000; alloc586(dev); printk("Memaddr: 0x%lx, Memsize: %d, ",dev->mem_start,size); if(dev->irq < 2) { autoirq_setup(0); ni_reset586(); ni_attn586(); if(!(dev->irq = autoirq_report(2))) { printk("?autoirq, Failed to detect IRQ line!\n"); return 1; } } else if(dev->irq == 2) dev->irq = 9; printk("IRQ %d.\n",dev->irq); dev->open = &ni52_open; dev->stop = &ni52_close; dev->get_stats = &ni52_get_stats; dev->hard_start_xmit = &ni52_send_packet; dev->set_multicast_list = &set_multicast_list; dev->if_port = 0; ether_setup(dev); dev->tbusy = 0; dev->interrupt = 0; dev->start = 0; return 0; } /********************************************** * init the chip (ni52-interrupt should be disabled?!) * needs a correct 'allocated' memory */ static int init586(struct device *dev) { void *ptr; unsigned long s; 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; ptr = (void *) ((char *)p->scb + sizeof(struct scb_struct)); cfg_cmd = (struct configure_cmd_struct *)ptr; /* configure-command */ cfg_cmd->byte_cnt = 0x04; /* number of cfg bytes */ cfg_cmd->fifo = 0xc8; /* fifo-limit (8=tx:32/rx:64) | monitor */ 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->cmd_status = 0; cfg_cmd->cmd_cmd = CMD_CONFIGURE | CMD_LAST; cfg_cmd->cmd_link = 0xffff; p->scb->cbl_offset = make16(cfg_cmd); p->scb->cmd = CUC_START; /* cmd.-unit start */ ni_attn586(); s = jiffies; /* warning: only active with interrupts on !! */ while(!(cfg_cmd->cmd_status & STAT_COMPL)) if(jiffies-s > 30) break; if((cfg_cmd->cmd_status & (STAT_OK|STAT_COMPL)) != (STAT_COMPL|STAT_OK)) { printk("%s (ni52): configure command failed: %x\n",dev->name,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 = 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_START; /* cmd.-unit start */ ni_attn586(); s = jiffies; while(!(ias_cmd->cmd_status & STAT_COMPL)) if(jiffies-s > 30) break; if((ias_cmd->cmd_status & (STAT_OK|STAT_COMPL)) != (STAT_OK|STAT_COMPL)) { printk("%s (ni52): individual address setup command failed: %04x\n",dev->name,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 = CMD_TDR | CMD_LAST; tdr_cmd->cmd_link = 0xffff; tdr_cmd->status = 0; p->scb->cbl_offset = make16(tdr_cmd); p->scb->cmd = CUC_START; /* cmd.-unit start */ ni_attn586(); s = jiffies; while(!(tdr_cmd->cmd_status & STAT_COMPL)) if(jiffies - s > 30) { printk("%s: Problems while running the TDR.\n",dev->name); result = 1; } if(!result) { DELAY(2); /* wait for result */ result = tdr_cmd->status; p->scb->cmd = p->scb->status & STAT_MASK; ni_attn586(); /* ack the interrupts */ if(result & TDR_LNK_OK) ; else if(result & TDR_XCVR_PRB) printk("%s: TDR: Transceiver problem!\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); } /* * ack interrupts */ p->scb->cmd = p->scb->status & STAT_MASK; ni_attn586(); /* * alloc nop/xmit-cmds */ #ifdef ONLY_ONE_XMIT_BUF for(i=0;i<2;i++) { p->nop_cmds[i] = (struct nop_cmd_struct *)ptr; p->nop_cmds[i]->cmd_cmd = 0; p->nop_cmds[i]->cmd_status = 0; p->nop_cmds[i]->cmd_link = make16((p->nop_cmds[i])); ptr += sizeof(struct nop_cmd_struct); } p->xmit_cmds[0] = (struct transmit_cmd_struct *)ptr; /* transmit cmd/buff 0 */ ptr += sizeof(struct transmit_cmd_struct); #else for(i=0;inop_cmds[i] = (struct nop_cmd_struct *)ptr; p->nop_cmds[i]->cmd_cmd = 0; p->nop_cmds[i]->cmd_status = 0; p->nop_cmds[i]->cmd_link = make16((p->nop_cmds[i])); ptr += sizeof(struct nop_cmd_struct); p->xmit_cmds[i] = (struct transmit_cmd_struct *)ptr; /* transmit cmd/buff 0 */ ptr += sizeof(struct transmit_cmd_struct); } #endif ptr = alloc_rfa(dev,(void *)ptr); /* init receive-frame-area */ /* * alloc xmit-buffs */ for(i=0;ixmit_cbuffs[i] = (char *)ptr; /* char-buffs */ ptr += XMIT_BUFF_SIZE; p->xmit_buffs[i] = (struct tbd_struct *)ptr; /* TBD */ ptr += sizeof(struct tbd_struct); if((void *)ptr > (void *)p->iscp) { 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_status = STAT_COMPL; 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' (nop-loop) */ #ifndef NO_NOPCOMMANDS p->scb->cbl_offset = make16(p->nop_cmds[0]); p->scb->cmd = CUC_START; ni_attn586(); while(p->scb->cmd); #else /* p->nop_cmds[0]->cmd_link = make16(p->nop_cmds[1]); p->nop_cmds[1]->cmd_link = make16(p->xmit_cmds[0]); */ p->xmit_cmds[0]->cmd_link = 0xffff; p->xmit_cmds[0]->cmd_cmd = CMD_XMIT | CMD_LAST | CMD_INT; #endif return 0; } /****************************************************** * This is a helper routine for ni52_nr_int() and init586(). * It sets up the Receive Frame Area (RFA). */ static void *alloc_rfa(struct 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)*NUM_RECV_FRAMES); p->rfd_first = rfd; for(i = 0; i < NUM_RECV_FRAMES; i++) rfd[i].next = make16(rfd + (i+1) % NUM_RECV_FRAMES); rfd[NUM_RECV_FRAMES-1].last = RFD_LAST; /* set EOL (no RU suspend) */ ptr = (char *) (rfd + NUM_RECV_FRAMES); rbd = (struct rbd_struct *) ptr; ptr += sizeof(struct rbd_struct)*NUM_RECV_BUFFS; /* clr descriptors */ memset((char *) rbd,0,sizeof(struct rbd_struct)*NUM_RECV_BUFFS); p->min_cbuff32 = ptr; for(i=0;imax_cbuff32 = ptr; p->max_cbuff24 = make24(p->max_cbuff32); p->rfd_top = p->rfd_first; p->rfd_last = p->rfd_first + NUM_RECV_FRAMES - 1; p->rbd_last = rbd + NUM_RECV_BUFFS - 1; p->scb->rfa_offset = make16(p->rfd_first); p->rfd_first->rbd_offset = make16(rbd); return ptr; } /************************************************** * Interrupt Handler ... */ static void ni52_interrupt(int reg_ptr) { int irq = -(((struct pt_regs *)reg_ptr)->orig_eax+2); struct device *dev = (struct device *)(irq2dev_map[irq]); unsigned short stat; int pd = 0; struct priv *p; #ifdef DEBUG2 printk("(1)"); #endif if (dev == NULL) { printk ("ni52-interrupt: irq %d for unknown device.\n", irq); return; } p = (struct priv *) dev->priv; if(dev->interrupt) { printk("(ni52-I)"); return; } dev->interrupt = 1; while((stat=p->scb->status & STAT_MASK)) { p->scb->cmd = stat; ni_attn586(); /* ack inter. */ if(pd) printk("ni52-%04x/%04x-",(int) stat,(int) p->scb->status); /* debug */ if(stat & (STAT_FR | STAT_RNR)) ni52_rcv_int(dev); if(stat & STAT_CX) ni52_xmt_int(dev); #ifndef NO_NOPCOMMANDS if(stat & STAT_CNA) #else if( (stat & STAT_CNA) && !(stat & STAT_CX) ) #endif printk("%s: oops! CU has left active state. stat: %04x/%04x.\n",dev->name,(int) stat,(int) p->scb->status); if(stat & STAT_RNR) { printk("%s: rnr: %04x/%04x.\n",dev->name,(int) stat,(int) p->scb->status); ni52_rnr_int(dev); pd = 1; /* local debug on */ } #ifdef DEBUG2 pd++; #endif while(p->scb->cmd) { int i; /* wait for ack. (ni52_xmt_int can be faster than ack!!) */ for(i=0;i<200;i++); } } #ifdef DEBUG { static int old_ovr=0; int l; if((l = p->scb->ovrn_errs - old_ovr)) { if(l > 0) p->stats.rx_over_errors += l; else old_ovr=0; } } #endif #ifdef DEBUG2 printk("(2)"); #endif dev->interrupt = 0; } /******************************************************* * receive-interrupt */ static void ni52_rcv_int(struct device *dev) { int status; unsigned short totlen,pnt; struct sk_buff *skb; struct rbd_struct *rbd,*rbd_first; struct priv *p = (struct priv *) dev->priv; for(;(status = p->rfd_top->status) & STAT_COMPL;) { rbd = rbd_first = (struct rbd_struct *) make32(p->rfd_top->rbd_offset); #ifdef DEBUG1 { struct rbd_struct *rbd1 = rbd; if(rbd1==p->rbd_last) printk("L"); printk("S:%04x/%x/%02x >",(int) rbd1->status,(int) rbd1->size>>12,(int)((unsigned long) rbd1 & 0xff)); rbd1 = (struct rbd_struct *) make32(rbd1->next); for(;rbd1 != rbd_first;rbd1 = (struct rbd_struct *) make32(rbd1->next)) { if(rbd1 == p->rbd_last) printk("L:"); printk("%04x/%x-",(int) rbd1->status>>12,(int) rbd1->size>>12); } printk("< "); } { struct rfd_struct *rfd1 = p->rfd_top; if(rfd1==p->rfd_last) printk("L"); printk("S:%04x/%x/%02x >",(int) rfd1->status,(int) rfd1->last>>12,(int)((unsigned long) rfd1 & 0xff)); rfd1 = (struct rfd_struct *) make32(rfd1->next); for(;rfd1 != p->rfd_top;rfd1 = (struct rfd_struct *) make32(rfd1->next)) { if(rfd1 == p->rfd_last) printk("L:"); printk("%x/%x-",(int) rfd1->status>>12,(int) rfd1->last>>12); } printk("<\n"); } #endif p->rfd_top->status = 0; p->rfd_top->last = RFD_LAST; p->rfd_last->last = 0; /* delete RFD_LAST, no RU suspend */ p->rfd_last = p->rfd_top; p->rfd_top = (struct rfd_struct *) make32(p->rfd_top->next); if(status & RFD_ERRMASK) printk("%s: RFD-Error ... status: %04x.\n",dev->name,status); if(status & STAT_OK) { for(totlen=0; !(rbd->status & RBD_LAST); rbd=(struct rbd_struct *) make32(rbd->next)) { totlen += RECV_BUFF_SIZE; rbd->status = 0; } totlen += rbd->status & RBD_MASK; rbd->status = 0; skb = (struct sk_buff *) alloc_skb(totlen, GFP_ATOMIC); if (skb != NULL) /* copy header */ { skb->len = totlen; skb->dev = dev; if(rbd->buffer < rbd_first->buffer) { pnt = p->max_cbuff24 - rbd_first->buffer; memcpy( (char *) skb->data,p->max_cbuff32-pnt,pnt); memcpy( (char *) skb->data+pnt,p->min_cbuff32,totlen-pnt); } else memcpy( (char *) skb->data,(char *) p->base+(unsigned long) rbd_first->buffer, totlen); rbd->size |= RBD_LAST; p->rbd_last->size &= ~RBD_LAST; p->rbd_last = rbd; netif_rx(skb); p->stats.rx_packets++; } else { rbd->size |= RBD_LAST; p->rbd_last->size &= ~RBD_LAST; p->rbd_last = rbd; } } else /* frame !(ok), only with 'save-bad-frames' */ { printk("%s: oops! rfd-error-status: %04x\n",dev->name,status); p->stats.rx_errors++; } } } /********************************************************** * I never got this error , (which should occur if someone * wants to blast your machine) so I couldn't debug it for now. * but we _try_ to fix the receiver not ready int. */ static void ni52_rnr_int(struct device *dev) { struct priv *p = (struct priv *) dev->priv; p->stats.rx_errors++; while(p->scb->cmd); /* wait for the last cmd */ p->scb->cmd = RUC_ABORT; ni_attn586(); while(p->scb->cmd); /* wait for accept cmd. */ alloc_rfa(dev,(char *)p->rfd_first); startrecv586(dev); /* restart */ } /********************************************************** * handle xmit - interrupt */ static void ni52_xmt_int(struct device *dev) { int status; struct priv *p = (struct priv *) dev->priv; /* if(!(p->xmit_cmds[0]->cmd_status & STAT_COMPL)) return; */ if( (status=p->xmit_cmds[p->xmit_last]->cmd_status) & STAT_OK) { p->stats.tx_packets++; p->stats.collisions += (status & TCMD_MAXCOLLMASK); dev->tbusy = 0; mark_bh(NET_BH); } 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) { 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; } } #ifndef ONLY_ONE_XMIT_BUF if( (++p->xmit_last) == NUM_XMIT_BUFFS) p->xmit_last = 0; #endif } /*********************************************************** * (re)start the receiver */ static void startrecv586(struct device *dev) { struct priv *p = (struct priv *) dev->priv; p->scb->rfa_offset = make16(p->rfd_first); p->scb->cmd = RUC_START; ni_attn586(); /* start cmd. */ while(p->scb->cmd); /* wait for accept cmd. (no timeout!!) */ DELAY(2); /* isn't necess. */ p->scb->cmd = p->scb->status & STAT_MASK; ni_attn586(); /* ack interr */ } /****************************************************** * send frame */ static int ni52_send_packet(struct sk_buff *skb, struct device *dev) { int len; #ifndef NO_NOPCOMMANDS int next_nop; #endif struct priv *p = (struct priv *) dev->priv; if(dev->tbusy) { int tickssofar = jiffies - dev->trans_start; if (tickssofar < 30) return 1; #ifdef DEBUG printk("%s: xmitter timed out, try to restart! stat: %04x\n",dev->name,p->scb->status); printk("%s: command-stats: %04x %04x\n",dev->name,p->xmit_cmds[0]->cmd_status,p->xmit_cmds[1]->cmd_status); #endif ni52_close(dev); ni52_open(dev); dev->trans_start = jiffies; } if(skb == NULL) { dev_tint(dev); return 0; } if (skb->len <= 0) return 0; if (set_bit(0, (void*)&dev->tbusy) != 0) printk("%s: Transmitter access conflict.\n", dev->name); else { memcpy((char *)p->xmit_cbuffs[p->xmit_count],(char *)(skb->data),skb->len); len = (ETH_ZLEN < skb->len) ? skb->len : ETH_ZLEN; #ifdef ONLY_ONE_XMIT_BUF # ifdef NO_NOPCOMMANDS p->xmit_buffs[0]->size = TBD_LAST | len; p->xmit_cmds[0]->cmd_status = 0; p->scb->cbl_offset = make16(p->xmit_cmds[0]); p->scb->cmd = CUC_START; dev->trans_start = jiffies; ni_attn586(); while(p->scb->cmd) for(len=0;len<256;len++); /* DELAY(1); */ /* TEST;TEST;TEST */ # else next_nop = (p->nop_point + 1) & 0x1; p->xmit_buffs[0]->size = TBD_LAST | len; p->xmit_cmds[0]->cmd_cmd = CMD_XMIT | CMD_INT; p->xmit_cmds[0]->cmd_status = 0; p->xmit_cmds[0]->cmd_link = 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->nop_point]->cmd_link = make16((p->xmit_cmds[0])); dev->trans_start = jiffies; p->nop_point = next_nop; # endif #else p->xmit_buffs[p->xmit_count]->size = TBD_LAST | len; if( (next_nop = p->xmit_count + 1) == NUM_XMIT_BUFFS ) next_nop = 0; p->xmit_cmds[p->xmit_count]->cmd_cmd = CMD_XMIT | CMD_INT; p->xmit_cmds[p->xmit_count]->cmd_status = 0; p->xmit_cmds[p->xmit_count]->cmd_link = 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; cli(); if(p->xmit_count != p->xmit_last) dev->tbusy = 0; sti(); #endif } dev_kfree_skb(skb,FREE_WRITE); return 0; } static struct enet_statistics *ni52_get_stats(struct device *dev) { struct priv *p = (struct priv *) dev->priv; #ifdef DEBUG3 printk("ni52: errs, crc %d, align %d, resource %d, ovrn %d.\n",(int) p->scb->crc_errs,(int) p->scb->aln_errs,(int) p->scb->rsc_errs,(int) p->scb->ovrn_errs); #endif return &p->stats; } static void set_multicast_list(struct device *dev, int num_addrs, void *addrs) { /* struct priv *p = (struct priv *) dev->priv; volatile struct configure_cmd_struct *cfg_cmd; */ if(!num_addrs) printk("%s: Currently, the Ni52 driver doesn't support promiscuous or multicast mode.\n",dev->name); #if 0 p->scb->cmd = CUC_SUSPEND; ni_attn586(); while(p->scb->cmd); p->scb->cmd = RUC_SUSPEND; ni_attn586(); while(p->scb->cmd); cfg_cmd = (struct configure_cmd_struct *) p->xmit_cbuffs[0]; /* we're using a transmitcommand */ cfg_cmd->cmd_status = 0; cfg_cmd->cmd_cmd = CMD_CONFIGURE | CMD_LAST; cfg_cmd->cmd_link = 0xffff; cfg_cmd->byte_cnt = 0x0a; /* number of cfg bytes */ cfg_cmd->fifo = 0x08; /* 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->ifd = 0x60; cfg_cmd->time_low = 0x00; cfg_cmd->time_high = 0xf2; cfg_cmd->promisc = 0x01; /* promisc on */ cfg_cmd->carr_coll = 0x00; p->scb->cbl_offset = make16(cfg_cmd); p->scb->cmd = CUC_START; /* cmd.-unit start */ ni_attn586(); while(p->scb->cmd); p->scb->cbl_offset = p->nop_cmds[0]->cmd_link = make16(p->nop_cmds[0]); p->scb->cmd = CUC_START; ni_atthn586(); while(p->scb->cmd); p->scb->cmd = RUC_RESUME; ni_atthn586(); while(p->scb->cmd); #endif }