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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * Sun3 i82586 Ethernet driver4 *5 * Cloned from ni52.c for the Sun3 by Sam Creasey (sammy@sammy.net)6 *7 * Original copyright follows:8 * --------------------------9 *10 * net-3-driver for the NI5210 card (i82586 Ethernet chip)11 *12 * This is an extension to the Linux operating system, and is covered by the13 * same Gnu Public License that covers that work.14 *15 * Alphacode 0.82 (96/09/29) for Linux 2.0.0 (or later)16 * Copyrights (c) 1994,1995,1996 by M.Hipp (hippm@informatik.uni-tuebingen.de)17 * --------------------------18 *19 * Consult ni52.c for further notes from the original driver.20 *21 * This incarnation currently supports the OBIO version of the i82586 chip22 * used in certain sun3 models. It should be fairly doable to expand this23 * to support VME if I should every acquire such a board.24 *25 */26 27static int debuglevel = 0; /* debug-printk 0: off 1: a few 2: more */28static int automatic_resume = 0; /* experimental .. better should be zero */29static int rfdadd = 0; /* rfdadd=1 may be better for 8K MEM cards */30static int fifo=0x8; /* don't change */31 32#include <linux/kernel.h>33#include <linux/module.h>34#include <linux/string.h>35#include <linux/errno.h>36#include <linux/ioport.h>37#include <linux/interrupt.h>38#include <linux/delay.h>39#include <linux/init.h>40#include <linux/bitops.h>41#include <asm/io.h>42#include <asm/idprom.h>43#include <asm/machines.h>44#include <asm/sun3mmu.h>45#include <asm/dvma.h>46#include <asm/byteorder.h>47 48#include <linux/netdevice.h>49#include <linux/etherdevice.h>50#include <linux/skbuff.h>51 52#include "sun3_82586.h"53 54#define DRV_NAME "sun3_82586"55 56#define DEBUG /* debug on */57#define SYSBUSVAL 0 /* 16 Bit */58#define SUN3_82586_TOTAL_SIZE PAGE_SIZE59 60#define sun3_attn586() {*(volatile unsigned char *)(dev->base_addr) |= IEOB_ATTEN; *(volatile unsigned char *)(dev->base_addr) &= ~IEOB_ATTEN;}61#define sun3_reset586() {*(volatile unsigned char *)(dev->base_addr) = 0; udelay(100); *(volatile unsigned char *)(dev->base_addr) = IEOB_NORSET;}62#define sun3_disint() {*(volatile unsigned char *)(dev->base_addr) &= ~IEOB_IENAB;}63#define sun3_enaint() {*(volatile unsigned char *)(dev->base_addr) |= IEOB_IENAB;}64#define sun3_active() {*(volatile unsigned char *)(dev->base_addr) |= (IEOB_IENAB|IEOB_ONAIR|IEOB_NORSET);}65 66#define make32(ptr16) (p->memtop + (swab16((unsigned short) (ptr16))) )67#define make24(ptr32) (char *)swab32(( ((unsigned long) (ptr32)) - p->base))68#define make16(ptr32) (swab16((unsigned short) ((unsigned long)(ptr32) - (unsigned long) p->memtop )))69 70/******************* how to calculate the buffers *****************************71 72 * IMPORTANT NOTE: if you configure only one NUM_XMIT_BUFFS, the driver works73 * --------------- in a different (more stable?) mode. Only in this mode it's74 * possible to configure the driver with 'NO_NOPCOMMANDS'75 76sizeof(scp)=12; sizeof(scb)=16; sizeof(iscp)=8;77sizeof(scp)+sizeof(iscp)+sizeof(scb) = 36 = INIT78sizeof(rfd) = 24; sizeof(rbd) = 12;79sizeof(tbd) = 8; sizeof(transmit_cmd) = 16;80sizeof(nop_cmd) = 8;81 82 * if you don't know the driver, better do not change these values: */83 84#define RECV_BUFF_SIZE 1536 /* slightly oversized */85#define XMIT_BUFF_SIZE 1536 /* slightly oversized */86#define NUM_XMIT_BUFFS 1 /* config for 32K shmem */87#define NUM_RECV_BUFFS_8 4 /* config for 32K shared mem */88#define NUM_RECV_BUFFS_16 9 /* config for 32K shared mem */89#define NUM_RECV_BUFFS_32 16 /* config for 32K shared mem */90#define NO_NOPCOMMANDS /* only possible with NUM_XMIT_BUFFS=1 */91 92/**************************************************************************/93 94/* different DELAYs */95#define DELAY(x) mdelay(32 * x);96#define DELAY_16(); { udelay(16); }97#define DELAY_18(); { udelay(4); }98 99/* wait for command with timeout: */100#define WAIT_4_SCB_CMD() \101{ int i; \102 for(i=0;i<16384;i++) { \103 if(!p->scb->cmd_cuc) break; \104 DELAY_18(); \105 if(i == 16383) { \106 printk("%s: scb_cmd timed out: %04x,%04x .. disabling i82586!!\n",dev->name,p->scb->cmd_cuc,p->scb->cus); \107 if(!p->reseted) { p->reseted = 1; sun3_reset586(); } } } }108 109#define WAIT_4_SCB_CMD_RUC() { int i; \110 for(i=0;i<16384;i++) { \111 if(!p->scb->cmd_ruc) break; \112 DELAY_18(); \113 if(i == 16383) { \114 printk("%s: scb_cmd (ruc) timed out: %04x,%04x .. disabling i82586!!\n",dev->name,p->scb->cmd_ruc,p->scb->rus); \115 if(!p->reseted) { p->reseted = 1; sun3_reset586(); } } } }116 117#define WAIT_4_STAT_COMPL(addr) { int i; \118 for(i=0;i<32767;i++) { \119 if(swab16((addr)->cmd_status) & STAT_COMPL) break; \120 DELAY_16(); DELAY_16(); } }121 122static int sun3_82586_probe1(struct net_device *dev,int ioaddr);123static irqreturn_t sun3_82586_interrupt(int irq,void *dev_id);124static int sun3_82586_open(struct net_device *dev);125static int sun3_82586_close(struct net_device *dev);126static netdev_tx_t sun3_82586_send_packet(struct sk_buff *,127 struct net_device *);128static struct net_device_stats *sun3_82586_get_stats(struct net_device *dev);129static void set_multicast_list(struct net_device *dev);130static void sun3_82586_timeout(struct net_device *dev, unsigned int txqueue);131#if 0132static void sun3_82586_dump(struct net_device *,void *);133#endif134 135/* helper-functions */136static int init586(struct net_device *dev);137static int check586(struct net_device *dev,char *where,unsigned size);138static void alloc586(struct net_device *dev);139static void startrecv586(struct net_device *dev);140static void *alloc_rfa(struct net_device *dev,void *ptr);141static void sun3_82586_rcv_int(struct net_device *dev);142static void sun3_82586_xmt_int(struct net_device *dev);143static void sun3_82586_rnr_int(struct net_device *dev);144 145struct priv146{147 unsigned long base;148 char *memtop;149 long int lock;150 int reseted;151 volatile struct rfd_struct *rfd_last,*rfd_top,*rfd_first;152 volatile struct scp_struct *scp; /* volatile is important */153 volatile struct iscp_struct *iscp; /* volatile is important */154 volatile struct scb_struct *scb; /* volatile is important */155 volatile struct tbd_struct *xmit_buffs[NUM_XMIT_BUFFS];156 volatile struct transmit_cmd_struct *xmit_cmds[NUM_XMIT_BUFFS];157#if (NUM_XMIT_BUFFS == 1)158 volatile struct nop_cmd_struct *nop_cmds[2];159#else160 volatile struct nop_cmd_struct *nop_cmds[NUM_XMIT_BUFFS];161#endif162 volatile int nop_point,num_recv_buffs;163 volatile char *xmit_cbuffs[NUM_XMIT_BUFFS];164 volatile int xmit_count,xmit_last;165};166 167/**********************************************168 * close device169 */170static int sun3_82586_close(struct net_device *dev)171{172 free_irq(dev->irq, dev);173 174 sun3_reset586(); /* the hard way to stop the receiver */175 176 netif_stop_queue(dev);177 178 return 0;179}180 181/**********************************************182 * open device183 */184static int sun3_82586_open(struct net_device *dev)185{186 int ret;187 188 sun3_disint();189 alloc586(dev);190 init586(dev);191 startrecv586(dev);192 sun3_enaint();193 194 ret = request_irq(dev->irq, sun3_82586_interrupt,0,dev->name,dev);195 if (ret)196 {197 sun3_reset586();198 return ret;199 }200 201 netif_start_queue(dev);202 203 return 0; /* most done by init */204}205 206/**********************************************207 * Check to see if there's an 82586 out there.208 */209static int check586(struct net_device *dev,char *where,unsigned size)210{211 struct priv pb;212 struct priv *p = &pb;213 char *iscp_addr;214 int i;215 216 p->base = (unsigned long) dvma_btov(0);217 p->memtop = (char *)dvma_btov((unsigned long)where);218 p->scp = (struct scp_struct *)(p->base + SCP_DEFAULT_ADDRESS);219 memset((char *)p->scp,0, sizeof(struct scp_struct));220 for(i=0;i<sizeof(struct scp_struct);i++) /* memory was writeable? */221 if(((char *)p->scp)[i])222 return 0;223 p->scp->sysbus = SYSBUSVAL; /* 1 = 8Bit-Bus, 0 = 16 Bit */224 if(p->scp->sysbus != SYSBUSVAL)225 return 0;226 227 iscp_addr = (char *)dvma_btov((unsigned long)where);228 229 p->iscp = (struct iscp_struct *) iscp_addr;230 memset((char *)p->iscp,0, sizeof(struct iscp_struct));231 232 p->scp->iscp = make24(p->iscp);233 p->iscp->busy = 1;234 235 sun3_reset586();236 sun3_attn586();237 DELAY(1); /* wait a while... */238 239 if(p->iscp->busy) /* i82586 clears 'busy' after successful init */240 return 0;241 242 return 1;243}244 245/******************************************************************246 * set iscp at the right place, called by sun3_82586_probe1 and open586.247 */248static void alloc586(struct net_device *dev)249{250 struct priv *p = netdev_priv(dev);251 252 sun3_reset586();253 DELAY(1);254 255 p->scp = (struct scp_struct *) (p->base + SCP_DEFAULT_ADDRESS);256 p->iscp = (struct iscp_struct *) dvma_btov(dev->mem_start);257 p->scb = (struct scb_struct *) ((char *)p->iscp + sizeof(struct iscp_struct));258 259 memset((char *) p->iscp,0,sizeof(struct iscp_struct));260 memset((char *) p->scp ,0,sizeof(struct scp_struct));261 262 p->scp->iscp = make24(p->iscp);263 p->scp->sysbus = SYSBUSVAL;264 p->iscp->scb_offset = make16(p->scb);265 p->iscp->scb_base = make24(dvma_btov(dev->mem_start));266 267 p->iscp->busy = 1;268 sun3_reset586();269 sun3_attn586();270 271 DELAY(1);272 273 if(p->iscp->busy)274 printk("%s: Init-Problems (alloc).\n",dev->name);275 276 p->reseted = 0;277 278 memset((char *)p->scb,0,sizeof(struct scb_struct));279}280 281static int __init sun3_82586_probe(void)282{283 struct net_device *dev;284 unsigned long ioaddr;285 static int found = 0;286 int err = -ENOMEM;287 288 /* check that this machine has an onboard 82586 */289 switch(idprom->id_machtype) {290 case SM_SUN3|SM_3_160:291 case SM_SUN3|SM_3_260:292 /* these machines have 82586 */293 break;294 295 default:296 return -ENODEV;297 }298 299 if (found)300 return -ENODEV;301 302 ioaddr = (unsigned long)ioremap(IE_OBIO, SUN3_82586_TOTAL_SIZE);303 if (!ioaddr)304 return -ENOMEM;305 found = 1;306 307 dev = alloc_etherdev(sizeof(struct priv));308 if (!dev)309 goto out;310 dev->irq = IE_IRQ;311 dev->base_addr = ioaddr;312 err = sun3_82586_probe1(dev, ioaddr);313 if (err)314 goto out1;315 err = register_netdev(dev);316 if (err)317 goto out2;318 return 0;319 320out2:321 release_region(ioaddr, SUN3_82586_TOTAL_SIZE);322out1:323 free_netdev(dev);324out:325 iounmap((void __iomem *)ioaddr);326 return err;327}328module_init(sun3_82586_probe);329 330static const struct net_device_ops sun3_82586_netdev_ops = {331 .ndo_open = sun3_82586_open,332 .ndo_stop = sun3_82586_close,333 .ndo_start_xmit = sun3_82586_send_packet,334 .ndo_set_rx_mode = set_multicast_list,335 .ndo_tx_timeout = sun3_82586_timeout,336 .ndo_get_stats = sun3_82586_get_stats,337 .ndo_validate_addr = eth_validate_addr,338 .ndo_set_mac_address = eth_mac_addr,339};340 341static int __init sun3_82586_probe1(struct net_device *dev,int ioaddr)342{343 int size, retval;344 345 if (!request_region(ioaddr, SUN3_82586_TOTAL_SIZE, DRV_NAME))346 return -EBUSY;347 348 /* copy in the ethernet address from the prom */349 eth_hw_addr_set(dev, idprom->id_ethaddr);350 351 printk("%s: SUN3 Intel 82586 found at %lx, ",dev->name,dev->base_addr);352 353 /*354 * check (or search) IO-Memory, 32K355 */356 size = 0x8000;357 358 dev->mem_start = (unsigned long)dvma_malloc_align(0x8000, 0x1000);359 dev->mem_end = dev->mem_start + size;360 361 if(size != 0x2000 && size != 0x4000 && size != 0x8000) {362 printk("\n%s: Illegal memory size %d. Allowed is 0x2000 or 0x4000 or 0x8000 bytes.\n",dev->name,size);363 retval = -ENODEV;364 goto out;365 }366 if(!check586(dev,(char *) dev->mem_start,size)) {367 printk("?memcheck, Can't find memory at 0x%lx with size %d!\n",dev->mem_start,size);368 retval = -ENODEV;369 goto out;370 }371 372 ((struct priv *)netdev_priv(dev))->memtop =373 (char *)dvma_btov(dev->mem_start);374 ((struct priv *)netdev_priv(dev))->base = (unsigned long) dvma_btov(0);375 alloc586(dev);376 377 /* set number of receive-buffs according to memsize */378 if(size == 0x2000)379 ((struct priv *)netdev_priv(dev))->num_recv_buffs =380 NUM_RECV_BUFFS_8;381 else if(size == 0x4000)382 ((struct priv *)netdev_priv(dev))->num_recv_buffs =383 NUM_RECV_BUFFS_16;384 else385 ((struct priv *)netdev_priv(dev))->num_recv_buffs =386 NUM_RECV_BUFFS_32;387 388 printk("Memaddr: 0x%lx, Memsize: %d, IRQ %d\n",dev->mem_start,size, dev->irq);389 390 dev->netdev_ops = &sun3_82586_netdev_ops;391 dev->watchdog_timeo = HZ/20;392 393 dev->if_port = 0;394 return 0;395out:396 release_region(ioaddr, SUN3_82586_TOTAL_SIZE);397 return retval;398}399 400 401static int init586(struct net_device *dev)402{403 void *ptr;404 int i,result=0;405 struct priv *p = netdev_priv(dev);406 volatile struct configure_cmd_struct *cfg_cmd;407 volatile struct iasetup_cmd_struct *ias_cmd;408 volatile struct tdr_cmd_struct *tdr_cmd;409 volatile struct mcsetup_cmd_struct *mc_cmd;410 struct netdev_hw_addr *ha;411 int num_addrs=netdev_mc_count(dev);412 413 ptr = (void *) ((char *)p->scb + sizeof(struct scb_struct));414 415 cfg_cmd = (struct configure_cmd_struct *)ptr; /* configure-command */416 cfg_cmd->cmd_status = 0;417 cfg_cmd->cmd_cmd = swab16(CMD_CONFIGURE | CMD_LAST);418 cfg_cmd->cmd_link = 0xffff;419 420 cfg_cmd->byte_cnt = 0x0a; /* number of cfg bytes */421 cfg_cmd->fifo = fifo; /* fifo-limit (8=tx:32/rx:64) */422 cfg_cmd->sav_bf = 0x40; /* hold or discard bad recv frames (bit 7) */423 cfg_cmd->adr_len = 0x2e; /* addr_len |!src_insert |pre-len |loopback */424 cfg_cmd->priority = 0x00;425 cfg_cmd->ifs = 0x60;426 cfg_cmd->time_low = 0x00;427 cfg_cmd->time_high = 0xf2;428 cfg_cmd->promisc = 0;429 if(dev->flags & IFF_ALLMULTI) {430 int len = ((char *) p->iscp - (char *) ptr - 8) / 6;431 if(num_addrs > len) {432 printk("%s: switching to promisc. mode\n",dev->name);433 cfg_cmd->promisc = 1;434 }435 }436 if(dev->flags&IFF_PROMISC)437 cfg_cmd->promisc = 1;438 cfg_cmd->carr_coll = 0x00;439 440 p->scb->cbl_offset = make16(cfg_cmd);441 p->scb->cmd_ruc = 0;442 443 p->scb->cmd_cuc = CUC_START; /* cmd.-unit start */444 sun3_attn586();445 446 WAIT_4_STAT_COMPL(cfg_cmd);447 448 if((swab16(cfg_cmd->cmd_status) & (STAT_OK|STAT_COMPL)) != (STAT_COMPL|STAT_OK))449 {450 printk("%s: configure command failed: %x\n",dev->name,swab16(cfg_cmd->cmd_status));451 return 1;452 }453 454 /*455 * individual address setup456 */457 458 ias_cmd = (struct iasetup_cmd_struct *)ptr;459 460 ias_cmd->cmd_status = 0;461 ias_cmd->cmd_cmd = swab16(CMD_IASETUP | CMD_LAST);462 ias_cmd->cmd_link = 0xffff;463 464 memcpy((char *)&ias_cmd->iaddr,(const char *) dev->dev_addr,ETH_ALEN);465 466 p->scb->cbl_offset = make16(ias_cmd);467 468 p->scb->cmd_cuc = CUC_START; /* cmd.-unit start */469 sun3_attn586();470 471 WAIT_4_STAT_COMPL(ias_cmd);472 473 if((swab16(ias_cmd->cmd_status) & (STAT_OK|STAT_COMPL)) != (STAT_OK|STAT_COMPL)) {474 printk("%s (82586): individual address setup command failed: %04x\n",dev->name,swab16(ias_cmd->cmd_status));475 return 1;476 }477 478 /*479 * TDR, wire check .. e.g. no resistor e.t.c480 */481 482 tdr_cmd = (struct tdr_cmd_struct *)ptr;483 484 tdr_cmd->cmd_status = 0;485 tdr_cmd->cmd_cmd = swab16(CMD_TDR | CMD_LAST);486 tdr_cmd->cmd_link = 0xffff;487 tdr_cmd->status = 0;488 489 p->scb->cbl_offset = make16(tdr_cmd);490 p->scb->cmd_cuc = CUC_START; /* cmd.-unit start */491 sun3_attn586();492 493 WAIT_4_STAT_COMPL(tdr_cmd);494 495 if(!(swab16(tdr_cmd->cmd_status) & STAT_COMPL))496 {497 printk("%s: Problems while running the TDR.\n",dev->name);498 }499 else500 {501 DELAY_16(); /* wait for result */502 result = swab16(tdr_cmd->status);503 504 p->scb->cmd_cuc = p->scb->cus & STAT_MASK;505 sun3_attn586(); /* ack the interrupts */506 507 if(result & TDR_LNK_OK)508 ;509 else if(result & TDR_XCVR_PRB)510 printk("%s: TDR: Transceiver problem. Check the cable(s)!\n",dev->name);511 else if(result & TDR_ET_OPN)512 printk("%s: TDR: No correct termination %d clocks away.\n",dev->name,result & TDR_TIMEMASK);513 else if(result & TDR_ET_SRT)514 {515 if (result & TDR_TIMEMASK) /* time == 0 -> strange :-) */516 printk("%s: TDR: Detected a short circuit %d clocks away.\n",dev->name,result & TDR_TIMEMASK);517 }518 else519 printk("%s: TDR: Unknown status %04x\n",dev->name,result);520 }521 522 /*523 * Multicast setup524 */525 if(num_addrs && !(dev->flags & IFF_PROMISC) )526 {527 mc_cmd = (struct mcsetup_cmd_struct *) ptr;528 mc_cmd->cmd_status = 0;529 mc_cmd->cmd_cmd = swab16(CMD_MCSETUP | CMD_LAST);530 mc_cmd->cmd_link = 0xffff;531 mc_cmd->mc_cnt = swab16(num_addrs * 6);532 533 i = 0;534 netdev_for_each_mc_addr(ha, dev)535 memcpy((char *) mc_cmd->mc_list[i++],536 ha->addr, ETH_ALEN);537 538 p->scb->cbl_offset = make16(mc_cmd);539 p->scb->cmd_cuc = CUC_START;540 sun3_attn586();541 542 WAIT_4_STAT_COMPL(mc_cmd);543 544 if( (swab16(mc_cmd->cmd_status) & (STAT_COMPL|STAT_OK)) != (STAT_COMPL|STAT_OK) )545 printk("%s: Can't apply multicast-address-list.\n",dev->name);546 }547 548 /*549 * alloc nop/xmit-cmds550 */551#if (NUM_XMIT_BUFFS == 1)552 for(i=0;i<2;i++)553 {554 p->nop_cmds[i] = (struct nop_cmd_struct *)ptr;555 p->nop_cmds[i]->cmd_cmd = swab16(CMD_NOP);556 p->nop_cmds[i]->cmd_status = 0;557 p->nop_cmds[i]->cmd_link = make16((p->nop_cmds[i]));558 ptr = (char *) ptr + sizeof(struct nop_cmd_struct);559 }560#else561 for(i=0;i<NUM_XMIT_BUFFS;i++)562 {563 p->nop_cmds[i] = (struct nop_cmd_struct *)ptr;564 p->nop_cmds[i]->cmd_cmd = swab16(CMD_NOP);565 p->nop_cmds[i]->cmd_status = 0;566 p->nop_cmds[i]->cmd_link = make16((p->nop_cmds[i]));567 ptr = (char *) ptr + sizeof(struct nop_cmd_struct);568 }569#endif570 571 ptr = alloc_rfa(dev,ptr); /* init receive-frame-area */572 573 /*574 * alloc xmit-buffs / init xmit_cmds575 */576 for(i=0;i<NUM_XMIT_BUFFS;i++)577 {578 p->xmit_cmds[i] = (struct transmit_cmd_struct *)ptr; /*transmit cmd/buff 0*/579 ptr = (char *) ptr + sizeof(struct transmit_cmd_struct);580 p->xmit_cbuffs[i] = (char *)ptr; /* char-buffs */581 ptr = (char *) ptr + XMIT_BUFF_SIZE;582 p->xmit_buffs[i] = (struct tbd_struct *)ptr; /* TBD */583 ptr = (char *) ptr + sizeof(struct tbd_struct);584 if(ptr > (void *)dev->mem_end)585 {586 printk("%s: not enough shared-mem for your configuration!\n",dev->name);587 return 1;588 }589 memset((char *)(p->xmit_cmds[i]) ,0, sizeof(struct transmit_cmd_struct));590 memset((char *)(p->xmit_buffs[i]),0, sizeof(struct tbd_struct));591 p->xmit_cmds[i]->cmd_link = make16(p->nop_cmds[(i+1)%NUM_XMIT_BUFFS]);592 p->xmit_cmds[i]->cmd_status = swab16(STAT_COMPL);593 p->xmit_cmds[i]->cmd_cmd = swab16(CMD_XMIT | CMD_INT);594 p->xmit_cmds[i]->tbd_offset = make16((p->xmit_buffs[i]));595 p->xmit_buffs[i]->next = 0xffff;596 p->xmit_buffs[i]->buffer = make24((p->xmit_cbuffs[i]));597 }598 599 p->xmit_count = 0;600 p->xmit_last = 0;601#ifndef NO_NOPCOMMANDS602 p->nop_point = 0;603#endif604 605 /*606 * 'start transmitter'607 */608#ifndef NO_NOPCOMMANDS609 p->scb->cbl_offset = make16(p->nop_cmds[0]);610 p->scb->cmd_cuc = CUC_START;611 sun3_attn586();612 WAIT_4_SCB_CMD();613#else614 p->xmit_cmds[0]->cmd_link = make16(p->xmit_cmds[0]);615 p->xmit_cmds[0]->cmd_cmd = swab16(CMD_XMIT | CMD_SUSPEND | CMD_INT);616#endif617 618 /*619 * ack. interrupts620 */621 p->scb->cmd_cuc = p->scb->cus & STAT_MASK;622 sun3_attn586();623 DELAY_16();624 625 sun3_enaint();626 sun3_active();627 628 return 0;629}630 631/******************************************************632 * This is a helper routine for sun3_82586_rnr_int() and init586().633 * It sets up the Receive Frame Area (RFA).634 */635 636static void *alloc_rfa(struct net_device *dev,void *ptr)637{638 volatile struct rfd_struct *rfd = (struct rfd_struct *)ptr;639 volatile struct rbd_struct *rbd;640 int i;641 struct priv *p = netdev_priv(dev);642 643 memset((char *) rfd,0,sizeof(struct rfd_struct)*(p->num_recv_buffs+rfdadd));644 p->rfd_first = rfd;645 646 for(i = 0; i < (p->num_recv_buffs+rfdadd); i++) {647 rfd[i].next = make16(rfd + (i+1) % (p->num_recv_buffs+rfdadd) );648 rfd[i].rbd_offset = 0xffff;649 }650 rfd[p->num_recv_buffs-1+rfdadd].last = RFD_SUSP; /* RU suspend */651 652 ptr = (void *) (rfd + (p->num_recv_buffs + rfdadd) );653 654 rbd = (struct rbd_struct *) ptr;655 ptr = (void *) (rbd + p->num_recv_buffs);656 657 /* clr descriptors */658 memset((char *) rbd,0,sizeof(struct rbd_struct)*(p->num_recv_buffs));659 660 for(i=0;i<p->num_recv_buffs;i++)661 {662 rbd[i].next = make16((rbd + (i+1) % p->num_recv_buffs));663 rbd[i].size = swab16(RECV_BUFF_SIZE);664 rbd[i].buffer = make24(ptr);665 ptr = (char *) ptr + RECV_BUFF_SIZE;666 }667 668 p->rfd_top = p->rfd_first;669 p->rfd_last = p->rfd_first + (p->num_recv_buffs - 1 + rfdadd);670 671 p->scb->rfa_offset = make16(p->rfd_first);672 p->rfd_first->rbd_offset = make16(rbd);673 674 return ptr;675}676 677 678/**************************************************679 * Interrupt Handler ...680 */681 682static irqreturn_t sun3_82586_interrupt(int irq,void *dev_id)683{684 struct net_device *dev = dev_id;685 unsigned short stat;686 int cnt=0;687 struct priv *p;688 689 if (!dev) {690 printk ("sun3_82586-interrupt: irq %d for unknown device.\n",irq);691 return IRQ_NONE;692 }693 p = netdev_priv(dev);694 695 if(debuglevel > 1)696 printk("I");697 698 WAIT_4_SCB_CMD(); /* wait for last command */699 700 while((stat=p->scb->cus & STAT_MASK))701 {702 p->scb->cmd_cuc = stat;703 sun3_attn586();704 705 if(stat & STAT_FR) /* received a frame */706 sun3_82586_rcv_int(dev);707 708 if(stat & STAT_RNR) /* RU went 'not ready' */709 {710 printk("(R)");711 if(p->scb->rus & RU_SUSPEND) /* special case: RU_SUSPEND */712 {713 WAIT_4_SCB_CMD();714 p->scb->cmd_ruc = RUC_RESUME;715 sun3_attn586();716 WAIT_4_SCB_CMD_RUC();717 }718 else719 {720 printk("%s: Receiver-Unit went 'NOT READY': %04x/%02x.\n",dev->name,(int) stat,(int) p->scb->rus);721 sun3_82586_rnr_int(dev);722 }723 }724 725 if(stat & STAT_CX) /* command with I-bit set complete */726 sun3_82586_xmt_int(dev);727 728#ifndef NO_NOPCOMMANDS729 if(stat & STAT_CNA) /* CU went 'not ready' */730 {731 if(netif_running(dev))732 printk("%s: oops! CU has left active state. stat: %04x/%02x.\n",dev->name,(int) stat,(int) p->scb->cus);733 }734#endif735 736 if(debuglevel > 1)737 printk("%d",cnt++);738 739 WAIT_4_SCB_CMD(); /* wait for ack. (sun3_82586_xmt_int can be faster than ack!!) */740 if(p->scb->cmd_cuc) /* timed out? */741 {742 printk("%s: Acknowledge timed out.\n",dev->name);743 sun3_disint();744 break;745 }746 }747 748 if(debuglevel > 1)749 printk("i");750 return IRQ_HANDLED;751}752 753/*******************************************************754 * receive-interrupt755 */756 757static void sun3_82586_rcv_int(struct net_device *dev)758{759 int status,cnt=0;760 unsigned short totlen;761 struct sk_buff *skb;762 struct rbd_struct *rbd;763 struct priv *p = netdev_priv(dev);764 765 if(debuglevel > 0)766 printk("R");767 768 for(;(status = p->rfd_top->stat_high) & RFD_COMPL;)769 {770 rbd = (struct rbd_struct *) make32(p->rfd_top->rbd_offset);771 772 if(status & RFD_OK) /* frame received without error? */773 {774 if( (totlen = swab16(rbd->status)) & RBD_LAST) /* the first and the last buffer? */775 {776 totlen &= RBD_MASK; /* length of this frame */777 rbd->status = 0;778 skb = netdev_alloc_skb(dev, totlen + 2);779 if(skb != NULL)780 {781 skb_reserve(skb,2);782 skb_put(skb,totlen);783 skb_copy_to_linear_data(skb,(char *) p->base+swab32((unsigned long) rbd->buffer),totlen);784 skb->protocol=eth_type_trans(skb,dev);785 netif_rx(skb);786 dev->stats.rx_packets++;787 }788 else789 dev->stats.rx_dropped++;790 }791 else792 {793 int rstat;794 /* free all RBD's until RBD_LAST is set */795 totlen = 0;796 while(!((rstat=swab16(rbd->status)) & RBD_LAST))797 {798 totlen += rstat & RBD_MASK;799 if(!rstat)800 {801 printk("%s: Whoops .. no end mark in RBD list\n",dev->name);802 break;803 }804 rbd->status = 0;805 rbd = (struct rbd_struct *) make32(rbd->next);806 }807 totlen += rstat & RBD_MASK;808 rbd->status = 0;809 printk("%s: received oversized frame! length: %d\n",dev->name,totlen);810 dev->stats.rx_dropped++;811 }812 }813 else /* frame !(ok), only with 'save-bad-frames' */814 {815 printk("%s: oops! rfd-error-status: %04x\n",dev->name,status);816 dev->stats.rx_errors++;817 }818 p->rfd_top->stat_high = 0;819 p->rfd_top->last = RFD_SUSP; /* maybe exchange by RFD_LAST */820 p->rfd_top->rbd_offset = 0xffff;821 p->rfd_last->last = 0; /* delete RFD_SUSP */822 p->rfd_last = p->rfd_top;823 p->rfd_top = (struct rfd_struct *) make32(p->rfd_top->next); /* step to next RFD */824 p->scb->rfa_offset = make16(p->rfd_top);825 826 if(debuglevel > 0)827 printk("%d",cnt++);828 }829 830 if(automatic_resume)831 {832 WAIT_4_SCB_CMD();833 p->scb->cmd_ruc = RUC_RESUME;834 sun3_attn586();835 WAIT_4_SCB_CMD_RUC();836 }837 838#ifdef WAIT_4_BUSY839 {840 int i;841 for(i=0;i<1024;i++)842 {843 if(p->rfd_top->status)844 break;845 DELAY_16();846 if(i == 1023)847 printk("%s: RU hasn't fetched next RFD (not busy/complete)\n",dev->name);848 }849 }850#endif851 852#if 0853 if(!at_least_one)854 {855 int i;856 volatile struct rfd_struct *rfds=p->rfd_top;857 volatile struct rbd_struct *rbds;858 printk("%s: received a FC intr. without having a frame: %04x %d\n",dev->name,status,old_at_least);859 for(i=0;i< (p->num_recv_buffs+4);i++)860 {861 rbds = (struct rbd_struct *) make32(rfds->rbd_offset);862 printk("%04x:%04x ",rfds->status,rbds->status);863 rfds = (struct rfd_struct *) make32(rfds->next);864 }865 printk("\nerrs: %04x %04x stat: %04x\n",(int)p->scb->rsc_errs,(int)p->scb->ovrn_errs,(int)p->scb->status);866 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);867 }868 old_at_least = at_least_one;869#endif870 871 if(debuglevel > 0)872 printk("r");873}874 875/**********************************************************876 * handle 'Receiver went not ready'.877 */878 879static void sun3_82586_rnr_int(struct net_device *dev)880{881 struct priv *p = netdev_priv(dev);882 883 dev->stats.rx_errors++;884 885 WAIT_4_SCB_CMD(); /* wait for the last cmd, WAIT_4_FULLSTAT?? */886 p->scb->cmd_ruc = RUC_ABORT; /* usually the RU is in the 'no resource'-state .. abort it now. */887 sun3_attn586();888 WAIT_4_SCB_CMD_RUC(); /* wait for accept cmd. */889 890 alloc_rfa(dev,(char *)p->rfd_first);891/* maybe add a check here, before restarting the RU */892 startrecv586(dev); /* restart RU */893 894 printk("%s: Receive-Unit restarted. Status: %04x\n",dev->name,p->scb->rus);895 896}897 898/**********************************************************899 * handle xmit - interrupt900 */901 902static void sun3_82586_xmt_int(struct net_device *dev)903{904 int status;905 struct priv *p = netdev_priv(dev);906 907 if(debuglevel > 0)908 printk("X");909 910 status = swab16(p->xmit_cmds[p->xmit_last]->cmd_status);911 if(!(status & STAT_COMPL))912 printk("%s: strange .. xmit-int without a 'COMPLETE'\n",dev->name);913 914 if(status & STAT_OK)915 {916 dev->stats.tx_packets++;917 dev->stats.collisions += (status & TCMD_MAXCOLLMASK);918 }919 else920 {921 dev->stats.tx_errors++;922 if(status & TCMD_LATECOLL) {923 printk("%s: late collision detected.\n",dev->name);924 dev->stats.collisions++;925 }926 else if(status & TCMD_NOCARRIER) {927 dev->stats.tx_carrier_errors++;928 printk("%s: no carrier detected.\n",dev->name);929 }930 else if(status & TCMD_LOSTCTS)931 printk("%s: loss of CTS detected.\n",dev->name);932 else if(status & TCMD_UNDERRUN) {933 dev->stats.tx_fifo_errors++;934 printk("%s: DMA underrun detected.\n",dev->name);935 }936 else if(status & TCMD_MAXCOLL) {937 printk("%s: Max. collisions exceeded.\n",dev->name);938 dev->stats.collisions += 16;939 }940 }941 942#if (NUM_XMIT_BUFFS > 1)943 if( (++p->xmit_last) == NUM_XMIT_BUFFS)944 p->xmit_last = 0;945#endif946 netif_wake_queue(dev);947}948 949/***********************************************************950 * (re)start the receiver951 */952 953static void startrecv586(struct net_device *dev)954{955 struct priv *p = netdev_priv(dev);956 957 WAIT_4_SCB_CMD();958 WAIT_4_SCB_CMD_RUC();959 p->scb->rfa_offset = make16(p->rfd_first);960 p->scb->cmd_ruc = RUC_START;961 sun3_attn586(); /* start cmd. */962 WAIT_4_SCB_CMD_RUC(); /* wait for accept cmd. (no timeout!!) */963}964 965static void sun3_82586_timeout(struct net_device *dev, unsigned int txqueue)966{967 struct priv *p = netdev_priv(dev);968#ifndef NO_NOPCOMMANDS969 if(p->scb->cus & CU_ACTIVE) /* COMMAND-UNIT active? */970 {971 netif_wake_queue(dev);972#ifdef DEBUG973 printk("%s: strange ... timeout with CU active?!?\n",dev->name);974 printk("%s: X0: %04x N0: %04x N1: %04x %d\n",dev->name,(int)swab16(p->xmit_cmds[0]->cmd_status),(int)swab16(p->nop_cmds[0]->cmd_status),(int)swab16(p->nop_cmds[1]->cmd_status),(int)p->nop_point);975#endif976 p->scb->cmd_cuc = CUC_ABORT;977 sun3_attn586();978 WAIT_4_SCB_CMD();979 p->scb->cbl_offset = make16(p->nop_cmds[p->nop_point]);980 p->scb->cmd_cuc = CUC_START;981 sun3_attn586();982 WAIT_4_SCB_CMD();983 netif_trans_update(dev); /* prevent tx timeout */984 return 0;985 }986#endif987 {988#ifdef DEBUG989 printk("%s: xmitter timed out, try to restart! stat: %02x\n",dev->name,p->scb->cus);990 printk("%s: command-stats: %04x\n", dev->name, swab16(p->xmit_cmds[0]->cmd_status));991 printk("%s: check, whether you set the right interrupt number!\n",dev->name);992#endif993 sun3_82586_close(dev);994 sun3_82586_open(dev);995 }996 netif_trans_update(dev); /* prevent tx timeout */997}998 999/******************************************************1000 * send frame1001 */1002 1003static netdev_tx_t1004sun3_82586_send_packet(struct sk_buff *skb, struct net_device *dev)1005{1006 int len,i;1007#ifndef NO_NOPCOMMANDS1008 int next_nop;1009#endif1010 struct priv *p = netdev_priv(dev);1011 1012 if(skb->len > XMIT_BUFF_SIZE)1013 {1014 printk("%s: Sorry, max. framelength is %d bytes. The length of your frame is %d bytes.\n",dev->name,XMIT_BUFF_SIZE,skb->len);1015 dev_kfree_skb(skb);1016 return NETDEV_TX_OK;1017 }1018 1019 netif_stop_queue(dev);1020 1021#if(NUM_XMIT_BUFFS > 1)1022 if(test_and_set_bit(0,(void *) &p->lock)) {1023 printk("%s: Queue was locked\n",dev->name);1024 return NETDEV_TX_BUSY;1025 }1026 else1027#endif1028 {1029 len = skb->len;1030 if (len < ETH_ZLEN) {1031 memset((void *)p->xmit_cbuffs[p->xmit_count], 0,1032 ETH_ZLEN);1033 len = ETH_ZLEN;1034 }1035 skb_copy_from_linear_data(skb, (void *)p->xmit_cbuffs[p->xmit_count], skb->len);1036 1037#if (NUM_XMIT_BUFFS == 1)1038# ifdef NO_NOPCOMMANDS1039 1040#ifdef DEBUG1041 if(p->scb->cus & CU_ACTIVE)1042 {1043 printk("%s: Hmmm .. CU is still running and we wanna send a new packet.\n",dev->name);1044 printk("%s: stat: %04x %04x\n",dev->name,p->scb->cus,swab16(p->xmit_cmds[0]->cmd_status));1045 }1046#endif1047 1048 p->xmit_buffs[0]->size = swab16(TBD_LAST | len);1049 for(i=0;i<16;i++)1050 {1051 p->xmit_cmds[0]->cmd_status = 0;1052 WAIT_4_SCB_CMD();1053 if( (p->scb->cus & CU_STATUS) == CU_SUSPEND)1054 p->scb->cmd_cuc = CUC_RESUME;1055 else1056 {1057 p->scb->cbl_offset = make16(p->xmit_cmds[0]);1058 p->scb->cmd_cuc = CUC_START;1059 }1060 1061 sun3_attn586();1062 if(!i)1063 dev_kfree_skb(skb);1064 WAIT_4_SCB_CMD();1065 if( (p->scb->cus & CU_ACTIVE)) /* test it, because CU sometimes doesn't start immediately */1066 break;1067 if(p->xmit_cmds[0]->cmd_status)1068 break;1069 if(i==15)1070 printk("%s: Can't start transmit-command.\n",dev->name);1071 }1072# else1073 next_nop = (p->nop_point + 1) & 0x1;1074 p->xmit_buffs[0]->size = swab16(TBD_LAST | len);1075 1076 p->xmit_cmds[0]->cmd_link = p->nop_cmds[next_nop]->cmd_link1077 = make16((p->nop_cmds[next_nop]));1078 p->xmit_cmds[0]->cmd_status = p->nop_cmds[next_nop]->cmd_status = 0;1079 1080 p->nop_cmds[p->nop_point]->cmd_link = make16((p->xmit_cmds[0]));1081 p->nop_point = next_nop;1082 dev_kfree_skb(skb);1083# endif1084#else1085 p->xmit_buffs[p->xmit_count]->size = swab16(TBD_LAST | len);1086 if( (next_nop = p->xmit_count + 1) == NUM_XMIT_BUFFS )1087 next_nop = 0;1088 1089 p->xmit_cmds[p->xmit_count]->cmd_status = 0;1090 /* linkpointer of xmit-command already points to next nop cmd */1091 p->nop_cmds[next_nop]->cmd_link = make16((p->nop_cmds[next_nop]));1092 p->nop_cmds[next_nop]->cmd_status = 0;1093 1094 p->nop_cmds[p->xmit_count]->cmd_link = make16((p->xmit_cmds[p->xmit_count]));1095 p->xmit_count = next_nop;1096 1097 {1098 unsigned long flags;1099 local_irq_save(flags);1100 if(p->xmit_count != p->xmit_last)1101 netif_wake_queue(dev);1102 p->lock = 0;1103 local_irq_restore(flags);1104 }1105 dev_kfree_skb(skb);1106#endif1107 }1108 return NETDEV_TX_OK;1109}1110 1111/*******************************************1112 * Someone wanna have the statistics1113 */1114 1115static struct net_device_stats *sun3_82586_get_stats(struct net_device *dev)1116{1117 struct priv *p = netdev_priv(dev);1118 unsigned short crc,aln,rsc,ovrn;1119 1120 crc = swab16(p->scb->crc_errs); /* get error-statistic from the ni82586 */1121 p->scb->crc_errs = 0;1122 aln = swab16(p->scb->aln_errs);1123 p->scb->aln_errs = 0;1124 rsc = swab16(p->scb->rsc_errs);1125 p->scb->rsc_errs = 0;1126 ovrn = swab16(p->scb->ovrn_errs);1127 p->scb->ovrn_errs = 0;1128 1129 dev->stats.rx_crc_errors += crc;1130 dev->stats.rx_fifo_errors += ovrn;1131 dev->stats.rx_frame_errors += aln;1132 dev->stats.rx_dropped += rsc;1133 1134 return &dev->stats;1135}1136 1137/********************************************************1138 * Set MC list ..1139 */1140 1141static void set_multicast_list(struct net_device *dev)1142{1143 netif_stop_queue(dev);1144 sun3_disint();1145 alloc586(dev);1146 init586(dev);1147 startrecv586(dev);1148 sun3_enaint();1149 netif_wake_queue(dev);1150}1151 1152#if 01153/*1154 * DUMP .. we expect a not running CMD unit and enough space1155 */1156void sun3_82586_dump(struct net_device *dev,void *ptr)1157{1158 struct priv *p = netdev_priv(dev);1159 struct dump_cmd_struct *dump_cmd = (struct dump_cmd_struct *) ptr;1160 int i;1161 1162 p->scb->cmd_cuc = CUC_ABORT;1163 sun3_attn586();1164 WAIT_4_SCB_CMD();1165 WAIT_4_SCB_CMD_RUC();1166 1167 dump_cmd->cmd_status = 0;1168 dump_cmd->cmd_cmd = CMD_DUMP | CMD_LAST;1169 dump_cmd->dump_offset = make16((dump_cmd + 1));1170 dump_cmd->cmd_link = 0xffff;1171 1172 p->scb->cbl_offset = make16(dump_cmd);1173 p->scb->cmd_cuc = CUC_START;1174 sun3_attn586();1175 WAIT_4_STAT_COMPL(dump_cmd);1176 1177 if( (dump_cmd->cmd_status & (STAT_COMPL|STAT_OK)) != (STAT_COMPL|STAT_OK) )1178 printk("%s: Can't get dump information.\n",dev->name);1179 1180 for(i=0;i<170;i++) {1181 printk("%02x ",(int) ((unsigned char *) (dump_cmd + 1))[i]);1182 if(i % 24 == 23)1183 printk("\n");1184 }1185 printk("\n");1186}1187#endif1188