/* * 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 General 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) * [feel free to mail ....] * * when using as module: (no autoprobing!) * 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 than 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) */ /* * 29.Sept.96: virt_to_bus changes for new memory scheme * 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; /* debug-printk 0: off 1: a few 2: more */ static int automatic_resume; /* experimental .. better should be zero */ static int rfdadd; /* rfdadd=1 may be better for 8K MEM cards */ static int fifo = 0x8; /* don't change */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include "ni52.h" #define DRV_NAME "ni52" #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) ((void __iomem *)(p->memtop + (short) (ptr16))) #define make24(ptr32) ((char __iomem *)(ptr32)) - p->base #define make16(ptr32) ((unsigned short) ((char __iomem *)(ptr32)\ - 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 */ /**************************************************************************/ #define NI52_TOTAL_SIZE 16 #define NI52_ADDR0 0x02 #define NI52_ADDR1 0x07 #define NI52_ADDR2 0x01 static int ni52_probe1(struct net_device *dev, int ioaddr); static irqreturn_t ni52_interrupt(int irq, void *dev_id); static int ni52_open(struct net_device *dev); static int ni52_close(struct net_device *dev); static netdev_tx_t ni52_send_packet(struct sk_buff *, struct net_device *); static struct net_device_stats *ni52_get_stats(struct net_device *dev); static void set_multicast_list(struct net_device *dev); static void ni52_timeout(struct net_device *dev); /* helper-functions */ static int init586(struct net_device *dev); static int check586(struct net_device *dev, unsigned size); static void alloc586(struct net_device *dev); static void startrecv586(struct net_device *dev); static void __iomem *alloc_rfa(struct net_device *dev, void __iomem *ptr); static void ni52_rcv_int(struct net_device *dev); static void ni52_xmt_int(struct net_device *dev); static void ni52_rnr_int(struct net_device *dev); struct priv { char __iomem *base; char __iomem *mapped; char __iomem *memtop; spinlock_t spinlock; int reset; struct rfd_struct __iomem *rfd_last, *rfd_top, *rfd_first; struct scp_struct __iomem *scp; struct iscp_struct __iomem *iscp; struct scb_struct __iomem *scb; struct tbd_struct __iomem *xmit_buffs[NUM_XMIT_BUFFS]; #if (NUM_XMIT_BUFFS == 1) struct transmit_cmd_struct __iomem *xmit_cmds[2]; struct nop_cmd_struct __iomem *nop_cmds[2]; #else struct transmit_cmd_struct __iomem *xmit_cmds[NUM_XMIT_BUFFS]; struct nop_cmd_struct __iomem *nop_cmds[NUM_XMIT_BUFFS]; #endif int nop_point, num_recv_buffs; char __iomem *xmit_cbuffs[NUM_XMIT_BUFFS]; int xmit_count, xmit_last; }; /* wait for command with timeout: */ static void wait_for_scb_cmd(struct net_device *dev) { struct priv *p = netdev_priv(dev); int i; for (i = 0; i < 16384; i++) { if (readb(&p->scb->cmd_cuc) == 0) break; udelay(4); if (i == 16383) { printk(KERN_ERR "%s: scb_cmd timed out: %04x,%04x .. disabling i82586!!\n", dev->name, readb(&p->scb->cmd_cuc), readb(&p->scb->cus)); if (!p->reset) { p->reset = 1; ni_reset586(); } } } } static void wait_for_scb_cmd_ruc(struct net_device *dev) { struct priv *p = netdev_priv(dev); int i; for (i = 0; i < 16384; i++) { if (readb(&p->scb->cmd_ruc) == 0) break; udelay(4); if (i == 16383) { printk(KERN_ERR "%s: scb_cmd (ruc) timed out: %04x,%04x .. disabling i82586!!\n", dev->name, readb(&p->scb->cmd_ruc), readb(&p->scb->rus)); if (!p->reset) { p->reset = 1; ni_reset586(); } } } } static void wait_for_stat_compl(void __iomem *p) { struct nop_cmd_struct __iomem *addr = p; int i; for (i = 0; i < 32767; i++) { if (readw(&((addr)->cmd_status)) & STAT_COMPL) break; udelay(32); } } /********************************************** * close device */ static int ni52_close(struct net_device *dev) { free_irq(dev->irq, dev); ni_reset586(); /* the hard way to stop the receiver */ netif_stop_queue(dev); return 0; } /********************************************** * open device */ static int ni52_open(struct net_device *dev) { int ret; ni_disint(); alloc586(dev); init586(dev); startrecv586(dev); ni_enaint(); ret = request_irq(dev->irq, ni52_interrupt, 0, dev->name, dev); if (ret) { ni_reset586(); return ret; } netif_start_queue(dev); return 0; /* most done by init */ } static int check_iscp(struct net_device *dev, void __iomem *addr) { struct iscp_struct __iomem *iscp = addr; struct priv *p = netdev_priv(dev); memset_io(iscp, 0, sizeof(struct iscp_struct)); writel(make24(iscp), &p->scp->iscp); writeb(1, &iscp->busy); ni_reset586(); ni_attn586(); mdelay(32); /* wait a while... */ /* i82586 clears 'busy' after successful init */ if (readb(&iscp->busy)) return 0; return 1; } /********************************************** * Check to see if there's an 82586 out there. */ static int check586(struct net_device *dev, unsigned size) { struct priv *p = netdev_priv(dev); int i; p->mapped = ioremap(dev->mem_start, size); if (!p->mapped) return 0; p->base = p->mapped + size - 0x01000000; p->memtop = p->mapped + size; p->scp = (struct scp_struct __iomem *)(p->base + SCP_DEFAULT_ADDRESS); p->scb = (struct scb_struct __iomem *) p->mapped; p->iscp = (struct iscp_struct __iomem *)p->scp - 1; memset_io(p->scp, 0, sizeof(struct scp_struct)); for (i = 0; i < sizeof(struct scp_struct); i++) /* memory was writeable? */ if (readb((char __iomem *)p->scp + i)) goto Enodev; writeb(SYSBUSVAL, &p->scp->sysbus); /* 1 = 8Bit-Bus, 0 = 16 Bit */ if (readb(&p->scp->sysbus) != SYSBUSVAL) goto Enodev; if (!check_iscp(dev, p->mapped)) goto Enodev; if (!check_iscp(dev, p->iscp)) goto Enodev; return 1; Enodev: iounmap(p->mapped); return 0; } /****************************************************************** * set iscp at the right place, called by ni52_probe1 and open586. */ static void alloc586(struct net_device *dev) { struct priv *p = netdev_priv(dev); ni_reset586(); mdelay(32); memset_io(p->iscp, 0, sizeof(struct iscp_struct)); memset_io(p->scp , 0, sizeof(struct scp_struct)); writel(make24(p->iscp), &p->scp->iscp); writeb(SYSBUSVAL, &p->scp->sysbus); writew(make16(p->scb), &p->iscp->scb_offset); writeb(1, &p->iscp->busy); ni_reset586(); ni_attn586(); mdelay(32); if (readb(&p->iscp->busy)) printk(KERN_ERR "%s: Init-Problems (alloc).\n", dev->name); p->reset = 0; memset_io(p->scb, 0, sizeof(struct scb_struct)); } /* set: io,irq,memstart,memend or set it when calling insmod */ static int irq = 9; static int io = 0x300; static long memstart; /* e.g 0xd0000 */ static long memend; /* e.g 0xd4000 */ /********************************************** * probe the ni5210-card */ struct net_device * __init ni52_probe(int unit) { struct net_device *dev = alloc_etherdev(sizeof(struct priv)); static int ports[] = {0x300, 0x280, 0x360 , 0x320 , 0x340, 0}; struct priv *p; int *port; int err = 0; if (!dev) return ERR_PTR(-ENOMEM); p = netdev_priv(dev); if (unit >= 0) { sprintf(dev->name, "eth%d", unit); netdev_boot_setup_check(dev); io = dev->base_addr; irq = dev->irq; memstart = dev->mem_start; memend = dev->mem_end; } if (io > 0x1ff) { /* Check a single specified location. */ err = ni52_probe1(dev, io); } else if (io > 0) { /* Don't probe at all. */ err = -ENXIO; } else { for (port = ports; *port && ni52_probe1(dev, *port) ; port++) ; if (*port) goto got_it; #ifdef FULL_IO_PROBE for (io = 0x200; io < 0x400 && ni52_probe1(dev, io); io += 8) ; if (io < 0x400) goto got_it; #endif err = -ENODEV; } if (err) goto out; got_it: err = register_netdev(dev); if (err) goto out1; return dev; out1: iounmap(p->mapped); release_region(dev->base_addr, NI52_TOTAL_SIZE); out: free_netdev(dev); return ERR_PTR(err); } static const struct net_device_ops ni52_netdev_ops = { .ndo_open = ni52_open, .ndo_stop = ni52_close, .ndo_get_stats = ni52_get_stats, .ndo_tx_timeout = ni52_timeout, .ndo_start_xmit = ni52_send_packet, .ndo_set_multicast_list = set_multicast_list, .ndo_change_mtu = eth_change_mtu, .ndo_set_mac_address = eth_mac_addr, .ndo_validate_addr = eth_validate_addr, }; static int __init ni52_probe1(struct net_device *dev, int ioaddr) { int i, size, retval; struct priv *priv = netdev_priv(dev); dev->base_addr = ioaddr; dev->irq = irq; dev->mem_start = memstart; dev->mem_end = memend; spin_lock_init(&priv->spinlock); if (!request_region(ioaddr, NI52_TOTAL_SIZE, DRV_NAME)) return -EBUSY; if (!(inb(ioaddr+NI52_MAGIC1) == NI52_MAGICVAL1) || !(inb(ioaddr+NI52_MAGIC2) == NI52_MAGICVAL2)) { retval = -ENODEV; goto out; } 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) { retval = -ENODEV; goto out; } printk(KERN_INFO "%s: NI5210 found at %#3lx, ", dev->name, dev->base_addr); /* * check (or search) IO-Memory, 8K and 16K */ #ifdef MODULE size = dev->mem_end - dev->mem_start; if (size != 0x2000 && size != 0x4000) { printk("\n"); printk(KERN_ERR "%s: Invalid memory size %d. Allowed is 0x2000 or 0x4000 bytes.\n", dev->name, size); retval = -ENODEV; goto out; } if (!check586(dev, size)) { printk(KERN_ERR "?memcheck, Can't find memory at 0x%lx with size %d!\n", dev->mem_start, size); retval = -ENODEV; goto out; } #else if (dev->mem_start != 0) { /* no auto-mem-probe */ size = 0x4000; /* check for 16K mem */ if (!check586(dev, size)) { size = 0x2000; /* check for 8K mem */ if (!check586(dev, size)) { printk(KERN_ERR "?memprobe, Can't find memory at 0x%lx!\n", dev->mem_start); retval = -ENODEV; goto out; } } } else { static const unsigned long memaddrs[] = { 0xc8000, 0xca000, 0xcc000, 0xce000, 0xd0000, 0xd2000, 0xd4000, 0xd6000, 0xd8000, 0xda000, 0xdc000, 0 }; for (i = 0;; i++) { if (!memaddrs[i]) { printk(KERN_ERR "?memprobe, Can't find io-memory!\n"); retval = -ENODEV; goto out; } dev->mem_start = memaddrs[i]; size = 0x2000; /* check for 8K mem */ if (check586(dev, size)) /* 8K-check */ break; size = 0x4000; /* check for 16K mem */ if (check586(dev, size)) /* 16K-check */ break; } } /* set mem_end showed by 'ifconfig' */ dev->mem_end = dev->mem_start + size; #endif alloc586(dev); /* set number of receive-buffs according to memsize */ if (size == 0x2000) priv->num_recv_buffs = NUM_RECV_BUFFS_8; else priv->num_recv_buffs = NUM_RECV_BUFFS_16; printk(KERN_DEBUG "Memaddr: 0x%lx, Memsize: %d, ", dev->mem_start, size); if (dev->irq < 2) { unsigned long irq_mask; irq_mask = probe_irq_on(); ni_reset586(); ni_attn586(); mdelay(20); dev->irq = probe_irq_off(irq_mask); if (!dev->irq) { printk("?autoirq, Failed to detect IRQ line!\n"); retval = -EAGAIN; iounmap(priv->mapped); goto out; } 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->netdev_ops = &ni52_netdev_ops; dev->watchdog_timeo = HZ/20; return 0; out: release_region(ioaddr, NI52_TOTAL_SIZE); return retval; } /********************************************** * init the chip (ni52-interrupt should be disabled?!) * needs a correct 'allocated' memory */ static int init586(struct net_device *dev) { void __iomem *ptr; int i, result = 0; struct priv *p = netdev_priv(dev); struct configure_cmd_struct __iomem *cfg_cmd; struct iasetup_cmd_struct __iomem *ias_cmd; struct tdr_cmd_struct __iomem *tdr_cmd; struct mcsetup_cmd_struct __iomem *mc_cmd; struct netdev_hw_addr *ha; int num_addrs = netdev_mc_count(dev); ptr = p->scb + 1; cfg_cmd = ptr; /* configure-command */ writew(0, &cfg_cmd->cmd_status); writew(CMD_CONFIGURE | CMD_LAST, &cfg_cmd->cmd_cmd); writew(0xFFFF, &cfg_cmd->cmd_link); /* number of cfg bytes */ writeb(0x0a, &cfg_cmd->byte_cnt); /* fifo-limit (8=tx:32/rx:64) */ writeb(fifo, &cfg_cmd->fifo); /* hold or discard bad recv frames (bit 7) */ writeb(0x40, &cfg_cmd->sav_bf); /* addr_len |!src_insert |pre-len |loopback */ writeb(0x2e, &cfg_cmd->adr_len); writeb(0x00, &cfg_cmd->priority); writeb(0x60, &cfg_cmd->ifs); writeb(0x00, &cfg_cmd->time_low); writeb(0xf2, &cfg_cmd->time_high); writeb(0x00, &cfg_cmd->promisc); if (dev->flags & IFF_ALLMULTI) { int len = ((char __iomem *)p->iscp - (char __iomem *)ptr - 8) / 6; if (num_addrs > len) { printk(KERN_ERR "%s: switching to promisc. mode\n", dev->name); writeb(0x01, &cfg_cmd->promisc); } } if (dev->flags & IFF_PROMISC) writeb(0x01, &cfg_cmd->promisc); writeb(0x00, &cfg_cmd->carr_coll); writew(make16(cfg_cmd), &p->scb->cbl_offset); writeb(0, &p->scb->cmd_ruc); writeb(CUC_START, &p->scb->cmd_cuc); /* cmd.-unit start */ ni_attn586(); wait_for_stat_compl(cfg_cmd); if ((readw(&cfg_cmd->cmd_status) & (STAT_OK|STAT_COMPL)) != (STAT_COMPL|STAT_OK)) { printk(KERN_ERR "%s: configure command failed: %x\n", dev->name, readw(&cfg_cmd->cmd_status)); return 1; } /* * individual address setup */ ias_cmd = ptr; writew(0, &ias_cmd->cmd_status); writew(CMD_IASETUP | CMD_LAST, &ias_cmd->cmd_cmd); writew(0xffff, &ias_cmd->cmd_link); memcpy_toio(&ias_cmd->iaddr, (char *)dev->dev_addr, ETH_ALEN); writew(make16(ias_cmd), &p->scb->cbl_offset); writeb(CUC_START, &p->scb->cmd_cuc); /* cmd.-unit start */ ni_attn586(); wait_for_stat_compl(ias_cmd); if ((readw(&ias_cmd->cmd_status) & (STAT_OK|STAT_COMPL)) != (STAT_OK|STAT_COMPL)) { printk(KERN_ERR "%s (ni52): individual address setup command failed: %04x\n", dev->name, readw(&ias_cmd->cmd_status)); return 1; } /* * TDR, wire check .. e.g. no resistor e.t.c */ tdr_cmd = ptr; writew(0, &tdr_cmd->cmd_status); writew(CMD_TDR | CMD_LAST, &tdr_cmd->cmd_cmd); writew(0xffff, &tdr_cmd->cmd_link); writew(0, &tdr_cmd->status); writew(make16(tdr_cmd), &p->scb->cbl_offset); writeb(CUC_START, &p->scb->cmd_cuc); /* cmd.-unit start */ ni_attn586(); wait_for_stat_compl(tdr_cmd); if (!(readw(&tdr_cmd->cmd_status) & STAT_COMPL)) printk(KERN_ERR "%s: Problems while running the TDR.\n", dev->name); else { udelay(16); result = readw(&tdr_cmd->status); writeb(readb(&p->scb->cus) & STAT_MASK, &p->scb->cmd_cuc); ni_attn586(); /* ack the interrupts */ if (result & TDR_LNK_OK) ; else if (result & TDR_XCVR_PRB) printk(KERN_ERR "%s: TDR: Transceiver problem. Check the cable(s)!\n", dev->name); else if (result & TDR_ET_OPN) printk(KERN_ERR "%s: TDR: No correct termination %d clocks away.\n", dev->name, result & TDR_TIMEMASK); else if (result & TDR_ET_SRT) { /* time == 0 -> strange :-) */ if (result & TDR_TIMEMASK) printk(KERN_ERR "%s: TDR: Detected a short circuit %d clocks away.\n", dev->name, result & TDR_TIMEMASK); } else printk(KERN_ERR "%s: TDR: Unknown status %04x\n", dev->name, result); } /* * Multicast setup */ if (num_addrs && !(dev->flags & IFF_PROMISC)) { mc_cmd = ptr; writew(0, &mc_cmd->cmd_status); writew(CMD_MCSETUP | CMD_LAST, &mc_cmd->cmd_cmd); writew(0xffff, &mc_cmd->cmd_link); writew(num_addrs * 6, &mc_cmd->mc_cnt); i = 0; netdev_for_each_mc_addr(ha, dev) memcpy_toio(mc_cmd->mc_list[i++], ha->addr, 6); writew(make16(mc_cmd), &p->scb->cbl_offset); writeb(CUC_START, &p->scb->cmd_cuc); ni_attn586(); wait_for_stat_compl(mc_cmd); if ((readw(&mc_cmd->cmd_status) & (STAT_COMPL|STAT_OK)) != (STAT_COMPL|STAT_OK)) printk(KERN_ERR "%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] = ptr; writew(CMD_NOP, &p->nop_cmds[i]->cmd_cmd); writew(0, &p->nop_cmds[i]->cmd_status); writew(make16(p->nop_cmds[i]), &p->nop_cmds[i]->cmd_link); ptr = ptr + sizeof(struct nop_cmd_struct); } #else for (i = 0; i < NUM_XMIT_BUFFS; i++) { p->nop_cmds[i] = ptr; writew(CMD_NOP, &p->nop_cmds[i]->cmd_cmd); writew(0, &p->nop_cmds[i]->cmd_status); writew(make16(p->nop_cmds[i]), &p->nop_cmds[i]->cmd_link); ptr = ptr + sizeof(struct nop_cmd_struct); } #endif ptr = alloc_rfa(dev, ptr); /* init receive-frame-area */ /* * alloc xmit-buffs / init xmit_cmds */ for (i = 0; i < NUM_XMIT_BUFFS; i++) { /* Transmit cmd/buff 0 */ p->xmit_cmds[i] = ptr; ptr = ptr + sizeof(struct transmit_cmd_struct); p->xmit_cbuffs[i] = ptr; /* char-buffs */ ptr = ptr + XMIT_BUFF_SIZE; p->xmit_buffs[i] = ptr; /* TBD */ ptr = ptr + sizeof(struct tbd_struct); if ((void __iomem *)ptr > (void __iomem *)p->iscp) { printk(KERN_ERR "%s: not enough shared-mem for your configuration!\n", dev->name); return 1; } memset_io(p->xmit_cmds[i], 0, sizeof(struct transmit_cmd_struct)); memset_io(p->xmit_buffs[i], 0, sizeof(struct tbd_struct)); writew(make16(p->nop_cmds[(i+1)%NUM_XMIT_BUFFS]), &p->xmit_cmds[i]->cmd_link); writew(STAT_COMPL, &p->xmit_cmds[i]->cmd_status); writew(CMD_XMIT|CMD_INT, &p->xmit_cmds[i]->cmd_cmd); writew(make16(p->xmit_buffs[i]), &p->xmit_cmds[i]->tbd_offset); writew(0xffff, &p->xmit_buffs[i]->next); writel(make24(p->xmit_cbuffs[i]), &p->xmit_buffs[i]->buffer); } p->xmit_count = 0; p->xmit_last = 0; #ifndef NO_NOPCOMMANDS p->nop_point = 0; #endif /* * 'start transmitter' */ #ifndef NO_NOPCOMMANDS writew(make16(p->nop_cmds[0]), &p->scb->cbl_offset); writeb(CUC_START, &p->scb->cmd_cuc); ni_attn586(); wait_for_scb_cmd(dev); #else writew(make16(p->xmit_cmds[0]), &p->xmit_cmds[0]->cmd_link); writew(CMD_XMIT | CMD_SUSPEND | CMD_INT, &p->xmit_cmds[0]->cmd_cmd); #endif /* * ack. interrupts */ writeb(readb(&p->scb->cus) & STAT_MASK, &p->scb->cmd_cuc); ni_attn586(); udelay(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 __iomem *alloc_rfa(struct net_device *dev, void __iomem *ptr) { struct rfd_struct __iomem *rfd = ptr; struct rbd_struct __iomem *rbd; int i; struct priv *p = netdev_priv(dev); memset_io(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++) { writew(make16(rfd + (i+1) % (p->num_recv_buffs+rfdadd)), &rfd[i].next); writew(0xffff, &rfd[i].rbd_offset); } /* RU suspend */ writeb(RFD_SUSP, &rfd[p->num_recv_buffs-1+rfdadd].last); ptr = rfd + (p->num_recv_buffs + rfdadd); rbd = ptr; ptr = rbd + p->num_recv_buffs; /* clr descriptors */ memset_io(rbd, 0, sizeof(struct rbd_struct) * (p->num_recv_buffs)); for (i = 0; i < p->num_recv_buffs; i++) { writew(make16(rbd + (i+1) % p->num_recv_buffs), &rbd[i].next); writew(RECV_BUFF_SIZE, &rbd[i].size); writel(make24(ptr), &rbd[i].buffer); ptr = ptr + RECV_BUFF_SIZE; } p->rfd_top = p->rfd_first; p->rfd_last = p->rfd_first + (p->num_recv_buffs - 1 + rfdadd); writew(make16(p->rfd_first), &p->scb->rfa_offset); writew(make16(rbd), &p->rfd_first->rbd_offset); return ptr; } /************************************************** * Interrupt Handler ... */ static irqreturn_t ni52_interrupt(int irq, void *dev_id) { struct net_device *dev = dev_id; unsigned int stat; int cnt = 0; struct priv *p; p = netdev_priv(dev); if (debuglevel > 1) printk("I"); spin_lock(&p->spinlock); wait_for_scb_cmd(dev); /* wait for last command */ while ((stat = readb(&p->scb->cus) & STAT_MASK)) { writeb(stat, &p->scb->cmd_cuc); ni_attn586(); if (stat & STAT_FR) /* received a frame */ ni52_rcv_int(dev); if (stat & STAT_RNR) { /* RU went 'not ready' */ printk("(R)"); if (readb(&p->scb->rus) & RU_SUSPEND) { /* special case: RU_SUSPEND */ wait_for_scb_cmd(dev); writeb(RUC_RESUME, &p->scb->cmd_ruc); ni_attn586(); wait_for_scb_cmd_ruc(dev); } else { printk(KERN_ERR "%s: Receiver-Unit went 'NOT READY': %04x/%02x.\n", dev->name, stat, readb(&p->scb->rus)); ni52_rnr_int(dev); } } /* Command with I-bit set complete */ if (stat & STAT_CX) ni52_xmt_int(dev); #ifndef NO_NOPCOMMANDS if (stat & STAT_CNA) { /* CU went 'not ready' */ if (netif_running(dev)) printk(KERN_ERR "%s: oops! CU has left active state. stat: %04x/%02x.\n", dev->name, stat, readb(&p->scb->cus)); } #endif if (debuglevel > 1) printk("%d", cnt++); /* Wait for ack. (ni52_xmt_int can be faster than ack!!) */ wait_for_scb_cmd(dev); if (readb(&p->scb->cmd_cuc)) { /* timed out? */ printk(KERN_ERR "%s: Acknowledge timed out.\n", dev->name); ni_disint(); break; } } spin_unlock(&p->spinlock); if (debuglevel > 1) printk("i"); return IRQ_HANDLED; } /******************************************************* * receive-interrupt */ static void ni52_rcv_int(struct net_device *dev) { int status, cnt = 0; unsigned short totlen; struct sk_buff *skb; struct rbd_struct __iomem *rbd; struct priv *p = netdev_priv(dev); if (debuglevel > 0) printk("R"); for (; (status = readb(&p->rfd_top->stat_high)) & RFD_COMPL;) { rbd = make32(readw(&p->rfd_top->rbd_offset)); if (status & RFD_OK) { /* frame received without error? */ totlen = readw(&rbd->status); if (totlen & RBD_LAST) { /* the first and the last buffer? */ totlen &= RBD_MASK; /* length of this frame */ writew(0x00, &rbd->status); skb = (struct sk_buff *)dev_alloc_skb(totlen+2); if (skb != NULL) { skb_reserve(skb, 2); skb_put(skb, totlen); memcpy_fromio(skb->data, p->base + readl(&rbd->buffer), totlen); skb->protocol = eth_type_trans(skb, dev); netif_rx(skb); dev->stats.rx_packets++; dev->stats.rx_bytes += totlen; } else dev->stats.rx_dropped++; } else { int rstat; /* free all RBD's until RBD_LAST is set */ totlen = 0; while (!((rstat = readw(&rbd->status)) & RBD_LAST)) { totlen += rstat & RBD_MASK; if (!rstat) { printk(KERN_ERR "%s: Whoops .. no end mark in RBD list\n", dev->name); break; } writew(0, &rbd->status); rbd = make32(readw(&rbd->next)); } totlen += rstat & RBD_MASK; writew(0, &rbd->status); printk(KERN_ERR "%s: received oversized frame! length: %d\n", dev->name, totlen); dev->stats.rx_dropped++; } } else {/* frame !(ok), only with 'save-bad-frames' */ printk(KERN_ERR "%s: oops! rfd-error-status: %04x\n", dev->name, status); dev->stats.rx_errors++; } writeb(0, &p->rfd_top->stat_high); writeb(RFD_SUSP, &p->rfd_top->last); /* maybe exchange by RFD_LAST */ writew(0xffff, &p->rfd_top->rbd_offset); writeb(0, &p->rfd_last->last); /* delete RFD_SUSP */ p->rfd_last = p->rfd_top; p->rfd_top = make32(readw(&p->rfd_top->next)); /* step to next RFD */ writew(make16(p->rfd_top), &p->scb->rfa_offset); if (debuglevel > 0) printk("%d", cnt++); } if (automatic_resume) { wait_for_scb_cmd(dev); writeb(RUC_RESUME, &p->scb->cmd_ruc); ni_attn586(); wait_for_scb_cmd_ruc(dev); } #ifdef WAIT_4_BUSY { int i; for (i = 0; i < 1024; i++) { if (p->rfd_top->status) break; udelay(16); if (i == 1023) printk(KERN_ERR "%s: RU hasn't fetched next RFD (not busy/complete)\n", dev->name); } } #endif if (debuglevel > 0) printk("r"); } /********************************************************** * handle 'Receiver went not ready'. */ static void ni52_rnr_int(struct net_device *dev) { struct priv *p = netdev_priv(dev); dev->stats.rx_errors++; wait_for_scb_cmd(dev); /* wait for the last cmd, WAIT_4_FULLSTAT?? */ writeb(RUC_ABORT, &p->scb->cmd_ruc); /* usually the RU is in the 'no resource'-state .. abort it now. */ ni_attn586(); wait_for_scb_cmd_ruc(dev); /* wait for accept cmd. */ alloc_rfa(dev, p->rfd_first); /* maybe add a check here, before restarting the RU */ startrecv586(dev); /* restart RU */ printk(KERN_ERR "%s: Receive-Unit restarted. Status: %04x\n", dev->name, readb(&p->scb->rus)); } /********************************************************** * handle xmit - interrupt */ static void ni52_xmt_int(struct net_device *dev) { int status; struct priv *p = netdev_priv(dev); if (debuglevel > 0) printk("X"); status = readw(&p->xmit_cmds[p->xmit_last]->cmd_status); if (!(status & STAT_COMPL)) printk(KERN_ERR "%s: strange .. xmit-int without a 'COMPLETE'\n", dev->name); if (status & STAT_OK) { dev->stats.tx_packets++; dev->stats.collisions += (status & TCMD_MAXCOLLMASK); } else { dev->stats.tx_errors++; if (status & TCMD_LATECOLL) { printk(KERN_ERR "%s: late collision detected.\n", dev->name); dev->stats.collisions++; } else if (status & TCMD_NOCARRIER) { dev->stats.tx_carrier_errors++; printk(KERN_ERR "%s: no carrier detected.\n", dev->name); } else if (status & TCMD_LOSTCTS) printk(KERN_ERR "%s: loss of CTS detected.\n", dev->name); else if (status & TCMD_UNDERRUN) { dev->stats.tx_fifo_errors++; printk(KERN_ERR "%s: DMA underrun detected.\n", dev->name); } else if (status & TCMD_MAXCOLL) { printk(KERN_ERR "%s: Max. collisions exceeded.\n", dev->name); dev->stats.collisions += 16; } } #if (NUM_XMIT_BUFFS > 1) if ((++p->xmit_last) == NUM_XMIT_BUFFS) p->xmit_last = 0; #endif netif_wake_queue(dev); } /*********************************************************** * (re)start the receiver */ static void startrecv586(struct net_device *dev) { struct priv *p = netdev_priv(dev); wait_for_scb_cmd(dev); wait_for_scb_cmd_ruc(dev); writew(make16(p->rfd_first), &p->scb->rfa_offset); writeb(RUC_START, &p->scb->cmd_ruc); ni_attn586(); /* start cmd. */ wait_for_scb_cmd_ruc(dev); /* wait for accept cmd. (no timeout!!) */ } static void ni52_timeout(struct net_device *dev) { struct priv *p = netdev_priv(dev); #ifndef NO_NOPCOMMANDS if (readb(&p->scb->cus) & CU_ACTIVE) { /* COMMAND-UNIT active? */ netif_wake_queue(dev); #ifdef DEBUG printk(KERN_ERR "%s: strange ... timeout with CU active?!?\n", dev->name); printk(KERN_ERR "%s: X0: %04x N0: %04x N1: %04x %d\n", dev->name, (int)p->xmit_cmds[0]->cmd_status, readw(&p->nop_cmds[0]->cmd_status), readw(&p->nop_cmds[1]->cmd_status), p->nop_point); #endif writeb(CUC_ABORT, &p->scb->cmd_cuc); ni_attn586(); wait_for_scb_cmd(dev); writew(make16(p->nop_cmds[p->nop_point]), &p->scb->cbl_offset); writeb(CUC_START, &p->scb->cmd_cuc); ni_attn586(); wait_for_scb_cmd(dev); dev->trans_start = jiffies; /* prevent tx timeout */ return 0; } #endif { #ifdef DEBUG printk(KERN_ERR "%s: xmitter timed out, try to restart! stat: %02x\n", dev->name, readb(&p->scb->cus)); printk(KERN_ERR "%s: command-stats: %04x %04x\n", dev->name, readw(&p->xmit_cmds[0]->cmd_status), readw(&p->xmit_cmds[1]->cmd_status)); printk(KERN_ERR "%s: check, whether you set the right interrupt number!\n", dev->name); #endif ni52_close(dev); ni52_open(dev); } dev->trans_start = jiffies; /* prevent tx timeout */ } /****************************************************** * send frame */ static netdev_tx_t ni52_send_packet(struct sk_buff *skb, struct net_device *dev) { int len, i; #ifndef NO_NOPCOMMANDS int next_nop; #endif struct priv *p = netdev_priv(dev); if (skb->len > XMIT_BUFF_SIZE) { printk(KERN_ERR "%s: Sorry, max. framelength is %d bytes. The length of your frame is %d bytes.\n", dev->name, XMIT_BUFF_SIZE, skb->len); return NETDEV_TX_OK; } netif_stop_queue(dev); memcpy_toio(p->xmit_cbuffs[p->xmit_count], skb->data, skb->len); len = skb->len; if (len < ETH_ZLEN) { len = ETH_ZLEN; memset_io(p->xmit_cbuffs[p->xmit_count]+skb->len, 0, len - skb->len); } #if (NUM_XMIT_BUFFS == 1) # ifdef NO_NOPCOMMANDS #ifdef DEBUG if (readb(&p->scb->cus) & CU_ACTIVE) { printk(KERN_ERR "%s: Hmmm .. CU is still running and we wanna send a new packet.\n", dev->name); printk(KERN_ERR "%s: stat: %04x %04x\n", dev->name, readb(&p->scb->cus), readw(&p->xmit_cmds[0]->cmd_status)); } #endif writew(TBD_LAST | len, &p->xmit_buffs[0]->size); for (i = 0; i < 16; i++) { writew(0, &p->xmit_cmds[0]->cmd_status); wait_for_scb_cmd(dev); if ((readb(&p->scb->cus) & CU_STATUS) == CU_SUSPEND) writeb(CUC_RESUME, &p->scb->cmd_cuc); else { writew(make16(p->xmit_cmds[0]), &p->scb->cbl_offset); writeb(CUC_START, &p->scb->cmd_cuc); } ni_attn586(); if (!i) dev_kfree_skb(skb); wait_for_scb_cmd(dev); /* test it, because CU sometimes doesn't start immediately */ if (readb(&p->scb->cus) & CU_ACTIVE) break; if (readw(&p->xmit_cmds[0]->cmd_status)) break; if (i == 15) printk(KERN_WARNING "%s: Can't start transmit-command.\n", dev->name); } # else next_nop = (p->nop_point + 1) & 0x1; writew(TBD_LAST | len, &p->xmit_buffs[0]->size); writew(make16(p->nop_cmds[next_nop]), &p->xmit_cmds[0]->cmd_link); writew(make16(p->nop_cmds[next_nop]), &p->nop_cmds[next_nop]->cmd_link); writew(0, &p->xmit_cmds[0]->cmd_status); writew(0, &p->nop_cmds[next_nop]->cmd_status); writew(make16(p->xmit_cmds[0]), &p->nop_cmds[p->nop_point]->cmd_link); p->nop_point = next_nop; dev_kfree_skb(skb); # endif #else writew(TBD_LAST | len, &p->xmit_buffs[p->xmit_count]->size); next_nop = p->xmit_count + 1 if (next_nop == NUM_XMIT_BUFFS) next_nop = 0; writew(0, &p->xmit_cmds[p->xmit_count]->cmd_status); /* linkpointer of xmit-command already points to next nop cmd */ writew(make16(p->nop_cmds[next_nop]), &p->nop_cmds[next_nop]->cmd_link); writew(0, &p->nop_cmds[next_nop]->cmd_status); writew(make16(p->xmit_cmds[p->xmit_count]), &p->nop_cmds[p->xmit_count]->cmd_link); p->xmit_count = next_nop; { unsigned long flags; spin_lock_irqsave(&p->spinlock); if (p->xmit_count != p->xmit_last) netif_wake_queue(dev); spin_unlock_irqrestore(&p->spinlock); } dev_kfree_skb(skb); #endif return NETDEV_TX_OK; } /******************************************* * Someone wanna have the statistics */ static struct net_device_stats *ni52_get_stats(struct net_device *dev) { struct priv *p = netdev_priv(dev); unsigned short crc, aln, rsc, ovrn; /* Get error-statistics from the ni82586 */ crc = readw(&p->scb->crc_errs); writew(0, &p->scb->crc_errs); aln = readw(&p->scb->aln_errs); writew(0, &p->scb->aln_errs); rsc = readw(&p->scb->rsc_errs); writew(0, &p->scb->rsc_errs); ovrn = readw(&p->scb->ovrn_errs); writew(0, &p->scb->ovrn_errs); dev->stats.rx_crc_errors += crc; dev->stats.rx_fifo_errors += ovrn; dev->stats.rx_frame_errors += aln; dev->stats.rx_dropped += rsc; return &dev->stats; } /******************************************************** * Set MC list .. */ static void set_multicast_list(struct net_device *dev) { netif_stop_queue(dev); ni_disint(); alloc586(dev); init586(dev); startrecv586(dev); ni_enaint(); netif_wake_queue(dev); } #ifdef MODULE static struct net_device *dev_ni52; module_param(io, int, 0); module_param(irq, int, 0); module_param(memstart, long, 0); module_param(memend, long, 0); MODULE_PARM_DESC(io, "NI5210 I/O base address,required"); MODULE_PARM_DESC(irq, "NI5210 IRQ number,required"); MODULE_PARM_DESC(memstart, "NI5210 memory base address,required"); MODULE_PARM_DESC(memend, "NI5210 memory end address,required"); int __init init_module(void) { if (io <= 0x0 || !memend || !memstart || irq < 2) { printk(KERN_ERR "ni52: Autoprobing not allowed for modules.\n"); printk(KERN_ERR "ni52: Set symbols 'io' 'irq' 'memstart' and 'memend'\n"); return -ENODEV; } dev_ni52 = ni52_probe(-1); if (IS_ERR(dev_ni52)) return PTR_ERR(dev_ni52); return 0; } void __exit cleanup_module(void) { struct priv *p = netdev_priv(dev_ni52); unregister_netdev(dev_ni52); iounmap(p->mapped); release_region(dev_ni52->base_addr, NI52_TOTAL_SIZE); free_netdev(dev_ni52); } #endif /* MODULE */ MODULE_LICENSE("GPL");