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[/] [or1k/] [trunk/] [rc203soc/] [sw/] [uClinux/] [drivers/] [net/] [ni52.c] - Rev 1765
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/* * 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 0.80 (96/02/19) for Linux 1.3.66 (or later) * Copyrights (c) 1994,1995,1996 by M.Hipp (Michael.Hipp@student.uni-tuebingen.de) * [feel free to mail ....] * * when using as module: (no autoprobing!) * compile with: gcc -D__KERNEL__ -DMODULE -O2 -c ni52.c * run with e.g: insmod ni52.o io=0x360 irq=9 memstart=0xd0000 memend=0xd4000 * * CAN YOU PLEASE REPORT ME YOUR PERFORMANCE EXPERIENCES !!. * * If you find a bug, please report me: * The kernel panic output and any kmsg from the ni52 driver * the ni5210-driver-version and the linux-kernel version * how many shared memory (memsize) on the netcard, * bootprom: yes/no, base_addr, mem_start * maybe the ni5210-card revision and the i82586 version * * autoprobe for: base_addr: 0x300,0x280,0x360,0x320,0x340 * mem_start: 0xd0000,0xd2000,0xc8000,0xca000,0xd4000,0xd6000, * 0xd8000,0xcc000,0xce000,0xda000,0xdc000 * * 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 (yes 596 not 586) manual, the existing drivers helped * me a lot to understand this tricky chip.) * * Known Problems: * 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. * my experience is, that if a machine sends with more then about 500-600K/s * the fifo/sysbus overflows. * * IMPORTANT NOTE: * On fast networks, it's a (very) good idea to have 16K shared memory. With * 8K, we can store only 4 receive frames, so it can (easily) happen that a remote * machine 'overruns' our system. * * Known i82586/card problems (I'm sure, there are many more!): * Running the NOP-mode, the i82586 sometimes seems to forget to report * every xmit-interrupt until we restart the CU. * Another MAJOR bug is, that the RU sometimes seems to ignore the EL-Bit * in the RBD-Struct which indicates an end of the RBD queue. * Instead, the RU fetches another (randomly selected and * usually used) RBD and begins to fill it. (Maybe, this happens only if * the last buffer from the previous RFD fits exact into the queue and * the next RFD can't fetch an initial RBD. Anyone knows more? ) * * results from ftp performance tests with Linux 1.2.5 * send and receive about 350-400 KByte/s (peak up to 460 kbytes/s) * sending in NOP-mode: peak performance up to 530K/s (but better don't run this mode) */ /* * 19.Feb.96: more Mcast changes, module support (MH) * * 18.Nov.95: Mcast changes (AC). * * 23.April.95: fixed(?) receiving problems by configuring a RFD more * than the number of RBD's. Can maybe cause other problems. * 18.April.95: Added MODULE support (MH) * 17.April.95: MC related changes in init586() and set_multicast_list(). * removed use of 'jiffies' in init586() (MH) * * 19.Sep.94: Added Multicast support (not tested yet) (MH) * * 18.Sep.94: Workaround for 'EL-Bug'. Removed flexible RBD-handling. * Now, every RFD has exact one RBD. (MH) * * 14.Sep.94: added promiscuous mode, a few cleanups (MH) * * 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) * * < 30.Sep.93: first versions */ 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 */ /* #define REALLY_SLOW_IO */ #include <linux/module.h> #include <linux/kernel.h> #include <linux/string.h> #include <linux/errno.h> #include <linux/ioport.h> #include <linux/malloc.h> #include <linux/interrupt.h> #include <linux/delay.h> #include <asm/bitops.h> #include <asm/io.h> #include <linux/netdevice.h> #include <linux/etherdevice.h> #include <linux/skbuff.h> #include "ni52.h" #define DEBUG /* debug on */ #define SYSBUSVAL 1 /* 8 Bit */ #define ni_attn586() {outb(0,dev->base_addr+NI52_ATTENTION);} #define ni_reset586() {outb(0,dev->base_addr+NI52_RESET);} #define ni_disint() {outb(0,dev->base_addr+NI52_INTDIS);} #define ni_enaint() {outb(0,dev->base_addr+NI52_INTENA);} #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 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 1524 /* slightly oversized */ #define XMIT_BUFF_SIZE 1524 /* slightly oversized */ #define NUM_XMIT_BUFFS 1 /* config for both, 8K and 16K shmem */ #define NUM_RECV_BUFFS_8 4 /* config for 8K shared mem */ #define NUM_RECV_BUFFS_16 9 /* config for 16K shared mem */ #define NO_NOPCOMMANDS /* only possible with NUM_XMIT_BUFFS=1 */ /**************************************************************************/ /* different DELAYs */ #define DELAY(x) __delay((loops_per_sec>>5)*(x)); #define DELAY_16(); { __delay( (loops_per_sec>>16)+1 ); } #define DELAY_18(); { __delay( (loops_per_sec>>18)+1 ); } /* 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; ni_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; ni_reset586(); } } } } #define WAIT_4_STAT_COMPL(addr) { int i; \ for(i=0;i<32767;i++) { \ if((addr)->cmd_status & STAT_COMPL) break; \ DELAY_16(); DELAY_16(); } } #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 irq,void *dev_id,struct pt_regs *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); #if 0 static void ni52_dump(struct device *,void *); #endif /* 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; int lock,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 ni52_close(struct device *dev) { free_irq(dev->irq, NULL); irq2dev_map[dev->irq] = NULL; ni_reset586(); /* the hard way to stop the receiver */ dev->start = 0; dev->tbusy = 0; MOD_DEC_USE_COUNT; return 0; } /********************************************** * open device */ static int ni52_open(struct device *dev) { ni_disint(); alloc586(dev); init586(dev); startrecv586(dev); ni_enaint(); if(request_irq(dev->irq, &ni52_interrupt,0,"ni5210",NULL)) { ni_reset586(); return -EAGAIN; } irq2dev_map[dev->irq] = dev; dev->interrupt = 0; dev->tbusy = 0; dev->start = 1; MOD_INC_USE_COUNT; 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 pb; struct priv *p = /* (struct priv *) dev->priv*/ &pb; 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)); 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_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(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 ni52_probe1 and open586. */ void alloc586(struct device *dev) { struct priv *p = (struct priv *) dev->priv; ni_reset586(); DELAY(1); 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(); 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)); } /********************************************** * probe the ni5210-card */ int ni52_probe(struct device *dev) { #ifndef MODULE int *port; static int ports[] = {0x300, 0x280, 0x360 , 0x320 , 0x340, 0}; #endif 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; #ifdef MODULE printk("%s: no autoprobing allowed for modules.\n",dev->name); #else 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; } #ifdef FULL_IO_PROBE for(dev->base_addr=0x200;dev->base_addr<0x400;dev->base_addr+=8) { int ioaddr = dev->base_addr; if (check_region(ioaddr, NI52_TOTAL_SIZE)) continue; if( !(inb(ioaddr+NI52_MAGIC1) == NI52_MAGICVAL1) || !(inb(ioaddr+NI52_MAGIC2) == NI52_MAGICVAL2)) continue; if (ni52_probe1(dev, ioaddr) == 0) return 0; } #endif #endif dev->base_addr = base_addr; return ENODEV; } static int ni52_probe1(struct device *dev,int ioaddr) { int i,size; for(i=0;i<ETH_ALEN;i++) dev->dev_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: NI5210 found at %#3lx, ",dev->name,dev->base_addr); request_region(ioaddr,NI52_TOTAL_SIZE,"ni5210"); /* * check (or search) IO-Memory, 8K and 16K */ #ifdef MODULE size = dev->mem_end - dev->mem_start; if(size != 0x2000 && size != 0x4000) { printk("\n%s: Illegal memory size %d. Allowed is 0x2000 or 0x4000 bytes.\n",dev->name,size); return ENODEV; } 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); return ENODEV; } #else if(dev->mem_start != 0) /* no auto-mem-probe */ { size = 0x4000; /* check for 16K mem */ if(!check586(dev,(char *) dev->mem_start,size)) { size = 0x2000; /* check for 8K mem */ if(!check586(dev,(char *) dev->mem_start,size)) { printk("?memprobe, Can't find memory at 0x%lx!\n",dev->mem_start); return ENODEV; } } } else { static long memaddrs[] = { 0xc8000,0xca000,0xcc000,0xce000,0xd0000,0xd2000, 0xd4000,0xd6000,0xd8000,0xda000,0xdc000, 0 }; for(i=0;;i++) { if(!memaddrs[i]) { printk("?memprobe, Can't find io-memory!\n"); return ENODEV; } dev->mem_start = memaddrs[i]; size = 0x2000; /* check for 8K mem */ if(check586(dev,(char *)dev->mem_start,size)) /* 8K-check */ break; size = 0x4000; /* check for 16K mem */ if(check586(dev,(char *)dev->mem_start,size)) /* 16K-check */ break; } } dev->mem_end = dev->mem_start + size; /* set mem_end showed by 'ifconfig' */ #endif dev->priv = (void *) kmalloc(sizeof(struct priv),GFP_KERNEL); if(dev->priv == NULL) { printk("%s: Ooops .. can't allocate private driver memory.\n",dev->name); return -ENOMEM; } /* warning: we don't free it on errors */ memset((char *) dev->priv,0,sizeof(struct priv)); ((struct priv *) (dev->priv))->memtop = (char *) dev->mem_start + size; ((struct priv *) (dev->priv))->base = dev->mem_start + size - 0x01000000; 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 ((struct priv *) dev->priv)->num_recv_buffs = NUM_RECV_BUFFS_16; 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; } printk("IRQ %d (autodetected).\n",dev->irq); } else { if(dev->irq == 2) dev->irq = 9; printk("IRQ %d (assigned and not checked!).\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; 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 = 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 */ ni_attn586(); WAIT_4_STAT_COMPL(cfg_cmd); if((cfg_cmd->cmd_status & (STAT_OK|STAT_COMPL)) != (STAT_COMPL|STAT_OK)) { printk("%s: 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 = CUC_START; /* cmd.-unit start */ ni_attn586(); WAIT_4_STAT_COMPL(ias_cmd); 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 = CUC_START; /* cmd.-unit start */ ni_attn586(); WAIT_4_STAT_COMPL(tdr_cmd); if(!(tdr_cmd->cmd_status & STAT_COMPL)) { printk("%s: Problems while running the TDR.\n",dev->name); } else { DELAY_16(); /* wait for result */ result = tdr_cmd->status; p->scb->cmd_cuc = p->scb->cus & STAT_MASK; ni_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 = CMD_MCSETUP | CMD_LAST; mc_cmd->cmd_link = 0xffff; mc_cmd->mc_cnt = 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; ni_attn586(); WAIT_4_STAT_COMPL(mc_cmd); if( (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 = 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 = 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 *)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_link = make16(p->nop_cmds[(i+1)%NUM_XMIT_BUFFS]); p->xmit_cmds[i]->cmd_status = STAT_COMPL; p->xmit_cmds[i]->cmd_cmd = 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; ni_attn586(); WAIT_4_SCB_CMD(); #else p->xmit_cmds[0]->cmd_link = make16(p->xmit_cmds[0]); p->xmit_cmds[0]->cmd_cmd = CMD_XMIT | CMD_SUSPEND | CMD_INT; #endif /* * ack. interrupts */ p->scb->cmd_cuc = p->scb->cus & STAT_MASK; ni_attn586(); DELAY_16(); ni_enaint(); return 0; } /****************************************************** * This is a helper routine for ni52_rnr_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)*(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 = 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 void ni52_interrupt(int irq,void *dev_id,struct pt_regs *reg_ptr) { struct device *dev = (struct device *) irq2dev_map[irq]; unsigned short stat; int cnt=0; struct priv *p; if (!dev) { printk ("ni5210-interrupt: irq %d for unknown device.\n",irq); return; } p = (struct priv *) dev->priv; if(debuglevel > 1) printk("I"); dev->interrupt = 1; WAIT_4_SCB_CMD(); /* wait for last command */ while((stat=p->scb->cus & STAT_MASK)) { p->scb->cmd_cuc = stat; ni_attn586(); if(stat & STAT_FR) /* received a frame */ ni52_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; ni_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); ni52_rnr_int(dev); } } if(stat & STAT_CX) /* command with I-bit set complete */ ni52_xmt_int(dev); #ifndef NO_NOPCOMMANDS if(stat & STAT_CNA) /* CU went 'not ready' */ { if(dev->start) 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. (ni52_xmt_int can be faster than ack!!) */ if(p->scb->cmd_cuc) /* timed out? */ { printk("%s: Acknowledge timed out.\n",dev->name); ni_disint(); break; } } if(debuglevel > 1) printk("i"); dev->interrupt = 0; } /******************************************************* * receive-interrupt */ static void ni52_rcv_int(struct 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 = 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->dev = dev; skb_reserve(skb,2); skb_put(skb,totlen); eth_copy_and_sum(skb,(char *) p->base+(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=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; ni_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 ni52_rnr_int(struct 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. */ ni_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 ni52_xmt_int(struct device *dev) { int status; struct priv *p = (struct priv *) dev->priv; if(debuglevel > 0) printk("X"); status = 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 dev->tbusy = 0; mark_bh(NET_BH); } /*********************************************************** * (re)start the receiver */ static void startrecv586(struct 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; ni_attn586(); /* start cmd. */ WAIT_4_SCB_CMD_RUC(); /* wait for accept cmd. (no timeout!!) */ } /****************************************************** * send frame */ static int ni52_send_packet(struct sk_buff *skb, struct device *dev) { int len,i; #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 < 5) return 1; #ifndef NO_NOPCOMMANDS if(p->scb->cus & CU_ACTIVE) /* COMMAND-UNIT active? */ { dev->tbusy = 0; #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)p->xmit_cmds[0]->cmd_status,(int)p->nop_cmds[0]->cmd_status,(int)p->nop_cmds[1]->cmd_status,(int)p->nop_point); #endif p->scb->cmd_cuc = CUC_ABORT; ni_attn586(); WAIT_4_SCB_CMD(); p->scb->cbl_offset = make16(p->nop_cmds[p->nop_point]); p->scb->cmd_cuc = CUC_START; ni_attn586(); WAIT_4_SCB_CMD(); dev->trans_start = jiffies; dev_kfree_skb(skb, FREE_WRITE); return 0; } else #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,p->xmit_cmds[0]->cmd_status,p->xmit_cmds[1]->cmd_status); printk("%s: check, whether you set the right interrupt number!\n",dev->name); #endif ni52_close(dev); ni52_open(dev); } dev->trans_start = jiffies; return 0; } if(skb == NULL) { dev_tint(dev); return 0; } if (skb->len <= 0) return 0; if(skb->len > XMIT_BUFF_SIZE) { printk("%s: Sorry, max. framelength is %d bytes. The length of your frame is %ld bytes.\n",dev->name,XMIT_BUFF_SIZE,skb->len); return 0; } if (set_bit(0, (void*)&dev->tbusy)) { printk("%s: Transmitter access conflict.\n", dev->name); return 1; } #if(NUM_XMIT_BUFFS > 1) else if(set_bit(0,(void *) &p->lock)) { printk("%s: Queue was locked\n",dev->name); return 1; } #endif else { memcpy((char *)p->xmit_cbuffs[p->xmit_count],(char *)(skb->data),skb->len); len = (ETH_ZLEN < skb->len) ? skb->len : ETH_ZLEN; #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,p->xmit_cmds[0]->cmd_status); } #endif p->xmit_buffs[0]->size = 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; } ni_attn586(); dev->trans_start = jiffies; if(!i) dev_kfree_skb(skb,FREE_WRITE); 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 = 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,FREE_WRITE); # 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_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; { long flags; save_flags(flags); cli(); if(p->xmit_count != p->xmit_last) dev->tbusy = 0; p->lock = 0; restore_flags(flags); } dev_kfree_skb(skb,FREE_WRITE); #endif } return 0; } /******************************************* * Someone wanna have the statistics */ static struct enet_statistics *ni52_get_stats(struct device *dev) { struct priv *p = (struct priv *) dev->priv; unsigned short crc,aln,rsc,ovrn; crc = p->scb->crc_errs; /* get error-statistic from the ni82586 */ p->scb->crc_errs = 0; aln = p->scb->aln_errs; p->scb->aln_errs = 0; rsc = p->scb->rsc_errs; p->scb->rsc_errs = 0; ovrn = 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 device *dev) { if(!dev->start) { printk("%s: Can't apply promiscuous/multicastmode to a not running interface.\n",dev->name); return; } dev->start = 0; ni_disint(); alloc586(dev); init586(dev); startrecv586(dev); ni_enaint(); dev->start = 1; } #ifdef MODULE static struct device dev_ni52 = { " ", /* "ni5210": device name inserted by net_init.c */ 0, 0, 0, 0, 0x300, 9, /* I/O address, IRQ */ 0, 0, 0, NULL, ni52_probe }; /* set: io,irq,memstart,memend or set it when calling insmod */ int irq=9; int io=0x300; long memstart=0; /* e.g 0xd0000 */ long memend=0; /* e.g 0xd4000 */ int init_module(void) { if(io <= 0x0 || !memend || !memstart || irq < 2) { printk("ni52: Autoprobing not allowed for modules.\nni52: Set symbols 'io' 'irq' 'memstart' and 'memend'\n"); return -ENODEV; } dev_ni52.irq = irq; dev_ni52.base_addr = io; dev_ni52.mem_end = memend; dev_ni52.mem_start = memstart; if (register_netdev(&dev_ni52) != 0) return -EIO; return 0; } void cleanup_module(void) { release_region(dev_ni52.base_addr, NI52_TOTAL_SIZE); kfree(dev_ni52.priv); dev_ni52.priv = NULL; unregister_netdev(&dev_ni52); } #endif /* MODULE */ #if 0 /* * DUMP .. we expect a not running CMD unit and enough space */ void ni52_dump(struct 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; ni_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; ni_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 /* * END: linux/drivers/net/ni52.c */