1 /*
2 * Sun3 i82586 Ethernet driver
3 *
4 * Cloned from ni52.c for the Sun3 by Sam Creasey (sammy@sammy.net)
5 *
6 * Original copyright follows:
7 * --------------------------
8 *
9 * net-3-driver for the NI5210 card (i82586 Ethernet chip)
10 *
11 * This is an extension to the Linux operating system, and is covered by the
12 * same Gnu Public License that covers that work.
13 *
14 * Alphacode 0.82 (96/09/29) for Linux 2.0.0 (or later)
15 * Copyrights (c) 1994,1995,1996 by M.Hipp (hippm@informatik.uni-tuebingen.de)
16 * --------------------------
17 *
18 * Consult ni52.c for further notes from the original driver.
19 *
20 * This incarnation currently supports the OBIO version of the i82586 chip
21 * used in certain sun3 models. It should be fairly doable to expand this
22 * to support VME if I should every acquire such a board.
23 *
24 */
25
26 static int debuglevel = 0; /* debug-printk 0: off 1: a few 2: more */
27 static int automatic_resume = 0; /* experimental .. better should be zero */
28 static int rfdadd = 0; /* rfdadd=1 may be better for 8K MEM cards */
29 static int fifo=0x8; /* don't change */
30
31 #include <linux/kernel.h>
32 #include <linux/module.h>
33 #include <linux/string.h>
34 #include <linux/errno.h>
35 #include <linux/ioport.h>
36 #include <linux/interrupt.h>
37 #include <linux/delay.h>
38 #include <linux/init.h>
39 #include <linux/bitops.h>
40 #include <asm/io.h>
41 #include <asm/idprom.h>
42 #include <asm/machines.h>
43 #include <asm/sun3mmu.h>
44 #include <asm/dvma.h>
45 #include <asm/byteorder.h>
46
47 #include <linux/netdevice.h>
48 #include <linux/etherdevice.h>
49 #include <linux/skbuff.h>
50
51 #include "sun3_82586.h"
52
53 #define DRV_NAME "sun3_82586"
54
55 #define DEBUG /* debug on */
56 #define SYSBUSVAL 0 /* 16 Bit */
57 #define SUN3_82586_TOTAL_SIZE PAGE_SIZE
58
59 #define sun3_attn586() {*(volatile unsigned char *)(dev->base_addr) |= IEOB_ATTEN; *(volatile unsigned char *)(dev->base_addr) &= ~IEOB_ATTEN;}
60 #define sun3_reset586() {*(volatile unsigned char *)(dev->base_addr) = 0; udelay(100); *(volatile unsigned char *)(dev->base_addr) = IEOB_NORSET;}
61 #define sun3_disint() {*(volatile unsigned char *)(dev->base_addr) &= ~IEOB_IENAB;}
62 #define sun3_enaint() {*(volatile unsigned char *)(dev->base_addr) |= IEOB_IENAB;}
63 #define sun3_active() {*(volatile unsigned char *)(dev->base_addr) |= (IEOB_IENAB|IEOB_ONAIR|IEOB_NORSET);}
64
65 #define make32(ptr16) (p->memtop + (swab16((unsigned short) (ptr16))) )
66 #define make24(ptr32) (char *)swab32(( ((unsigned long) (ptr32)) - p->base))
67 #define make16(ptr32) (swab16((unsigned short) ((unsigned long)(ptr32) - (unsigned long) p->memtop )))
68
69 /******************* how to calculate the buffers *****************************
70
71 * IMPORTANT NOTE: if you configure only one NUM_XMIT_BUFFS, the driver works
72 * --------------- in a different (more stable?) mode. Only in this mode it's
73 * possible to configure the driver with 'NO_NOPCOMMANDS'
74
75 sizeof(scp)=12; sizeof(scb)=16; sizeof(iscp)=8;
76 sizeof(scp)+sizeof(iscp)+sizeof(scb) = 36 = INIT
77 sizeof(rfd) = 24; sizeof(rbd) = 12;
78 sizeof(tbd) = 8; sizeof(transmit_cmd) = 16;
79 sizeof(nop_cmd) = 8;
80
81 * if you don't know the driver, better do not change these values: */
82
83 #define RECV_BUFF_SIZE 1536 /* slightly oversized */
84 #define XMIT_BUFF_SIZE 1536 /* slightly oversized */
85 #define NUM_XMIT_BUFFS 1 /* config for 32K shmem */
86 #define NUM_RECV_BUFFS_8 4 /* config for 32K shared mem */
87 #define NUM_RECV_BUFFS_16 9 /* config for 32K shared mem */
88 #define NUM_RECV_BUFFS_32 16 /* config for 32K shared mem */
89 #define NO_NOPCOMMANDS /* only possible with NUM_XMIT_BUFFS=1 */
90
91 /**************************************************************************/
92
93 /* different DELAYs */
94 #define DELAY(x) mdelay(32 * x);
95 #define DELAY_16(); { udelay(16); }
96 #define DELAY_18(); { udelay(4); }
97
98 /* wait for command with timeout: */
99 #define WAIT_4_SCB_CMD() \
100 { int i; \
101 for(i=0;i<16384;i++) { \
102 if(!p->scb->cmd_cuc) break; \
103 DELAY_18(); \
104 if(i == 16383) { \
105 printk("%s: scb_cmd timed out: %04x,%04x .. disabling i82586!!\n",dev->name,p->scb->cmd_cuc,p->scb->cus); \
106 if(!p->reseted) { p->reseted = 1; sun3_reset586(); } } } }
107
108 #define WAIT_4_SCB_CMD_RUC() { int i; \
109 for(i=0;i<16384;i++) { \
110 if(!p->scb->cmd_ruc) break; \
111 DELAY_18(); \
112 if(i == 16383) { \
113 printk("%s: scb_cmd (ruc) timed out: %04x,%04x .. disabling i82586!!\n",dev->name,p->scb->cmd_ruc,p->scb->rus); \
114 if(!p->reseted) { p->reseted = 1; sun3_reset586(); } } } }
115
116 #define WAIT_4_STAT_COMPL(addr) { int i; \
117 for(i=0;i<32767;i++) { \
118 if(swab16((addr)->cmd_status) & STAT_COMPL) break; \
119 DELAY_16(); DELAY_16(); } }
120
121 static int sun3_82586_probe1(struct net_device *dev,int ioaddr);
122 static irqreturn_t sun3_82586_interrupt(int irq,void *dev_id);
123 static int sun3_82586_open(struct net_device *dev);
124 static int sun3_82586_close(struct net_device *dev);
125 static netdev_tx_t sun3_82586_send_packet(struct sk_buff *,
126 struct net_device *);
127 static struct net_device_stats *sun3_82586_get_stats(struct net_device *dev);
128 static void set_multicast_list(struct net_device *dev);
129 static void sun3_82586_timeout(struct net_device *dev, unsigned int txqueue);
130 #if 0
131 static void sun3_82586_dump(struct net_device *,void *);
132 #endif
133
134 /* helper-functions */
135 static int init586(struct net_device *dev);
136 static int check586(struct net_device *dev,char *where,unsigned size);
137 static void alloc586(struct net_device *dev);
138 static void startrecv586(struct net_device *dev);
139 static void *alloc_rfa(struct net_device *dev,void *ptr);
140 static void sun3_82586_rcv_int(struct net_device *dev);
141 static void sun3_82586_xmt_int(struct net_device *dev);
142 static void sun3_82586_rnr_int(struct net_device *dev);
143
144 struct priv
145 {
146 unsigned long base;
147 char *memtop;
148 long int lock;
149 int reseted;
150 volatile struct rfd_struct *rfd_last,*rfd_top,*rfd_first;
151 volatile struct scp_struct *scp; /* volatile is important */
152 volatile struct iscp_struct *iscp; /* volatile is important */
153 volatile struct scb_struct *scb; /* volatile is important */
154 volatile struct tbd_struct *xmit_buffs[NUM_XMIT_BUFFS];
155 volatile struct transmit_cmd_struct *xmit_cmds[NUM_XMIT_BUFFS];
156 #if (NUM_XMIT_BUFFS == 1)
157 volatile struct nop_cmd_struct *nop_cmds[2];
158 #else
159 volatile struct nop_cmd_struct *nop_cmds[NUM_XMIT_BUFFS];
160 #endif
161 volatile int nop_point,num_recv_buffs;
162 volatile char *xmit_cbuffs[NUM_XMIT_BUFFS];
163 volatile int xmit_count,xmit_last;
164 };
165
166 /**********************************************
167 * close device
168 */
sun3_82586_close(struct net_device * dev)169 static int sun3_82586_close(struct net_device *dev)
170 {
171 free_irq(dev->irq, dev);
172
173 sun3_reset586(); /* the hard way to stop the receiver */
174
175 netif_stop_queue(dev);
176
177 return 0;
178 }
179
180 /**********************************************
181 * open device
182 */
sun3_82586_open(struct net_device * dev)183 static int sun3_82586_open(struct net_device *dev)
184 {
185 int ret;
186
187 sun3_disint();
188 alloc586(dev);
189 init586(dev);
190 startrecv586(dev);
191 sun3_enaint();
192
193 ret = request_irq(dev->irq, sun3_82586_interrupt,0,dev->name,dev);
194 if (ret)
195 {
196 sun3_reset586();
197 return ret;
198 }
199
200 netif_start_queue(dev);
201
202 return 0; /* most done by init */
203 }
204
205 /**********************************************
206 * Check to see if there's an 82586 out there.
207 */
check586(struct net_device * dev,char * where,unsigned size)208 static int check586(struct net_device *dev,char *where,unsigned size)
209 {
210 struct priv pb;
211 struct priv *p = &pb;
212 char *iscp_addr;
213 int i;
214
215 p->base = (unsigned long) dvma_btov(0);
216 p->memtop = (char *)dvma_btov((unsigned long)where);
217 p->scp = (struct scp_struct *)(p->base + SCP_DEFAULT_ADDRESS);
218 memset((char *)p->scp,0, sizeof(struct scp_struct));
219 for(i=0;i<sizeof(struct scp_struct);i++) /* memory was writeable? */
220 if(((char *)p->scp)[i])
221 return 0;
222 p->scp->sysbus = SYSBUSVAL; /* 1 = 8Bit-Bus, 0 = 16 Bit */
223 if(p->scp->sysbus != SYSBUSVAL)
224 return 0;
225
226 iscp_addr = (char *)dvma_btov((unsigned long)where);
227
228 p->iscp = (struct iscp_struct *) iscp_addr;
229 memset((char *)p->iscp,0, sizeof(struct iscp_struct));
230
231 p->scp->iscp = make24(p->iscp);
232 p->iscp->busy = 1;
233
234 sun3_reset586();
235 sun3_attn586();
236 DELAY(1); /* wait a while... */
237
238 if(p->iscp->busy) /* i82586 clears 'busy' after successful init */
239 return 0;
240
241 return 1;
242 }
243
244 /******************************************************************
245 * set iscp at the right place, called by sun3_82586_probe1 and open586.
246 */
alloc586(struct net_device * dev)247 static void alloc586(struct net_device *dev)
248 {
249 struct priv *p = netdev_priv(dev);
250
251 sun3_reset586();
252 DELAY(1);
253
254 p->scp = (struct scp_struct *) (p->base + SCP_DEFAULT_ADDRESS);
255 p->iscp = (struct iscp_struct *) dvma_btov(dev->mem_start);
256 p->scb = (struct scb_struct *) ((char *)p->iscp + sizeof(struct iscp_struct));
257
258 memset((char *) p->iscp,0,sizeof(struct iscp_struct));
259 memset((char *) p->scp ,0,sizeof(struct scp_struct));
260
261 p->scp->iscp = make24(p->iscp);
262 p->scp->sysbus = SYSBUSVAL;
263 p->iscp->scb_offset = make16(p->scb);
264 p->iscp->scb_base = make24(dvma_btov(dev->mem_start));
265
266 p->iscp->busy = 1;
267 sun3_reset586();
268 sun3_attn586();
269
270 DELAY(1);
271
272 if(p->iscp->busy)
273 printk("%s: Init-Problems (alloc).\n",dev->name);
274
275 p->reseted = 0;
276
277 memset((char *)p->scb,0,sizeof(struct scb_struct));
278 }
279
sun3_82586_probe(void)280 static int __init sun3_82586_probe(void)
281 {
282 struct net_device *dev;
283 unsigned long ioaddr;
284 static int found = 0;
285 int err = -ENOMEM;
286
287 /* check that this machine has an onboard 82586 */
288 switch(idprom->id_machtype) {
289 case SM_SUN3|SM_3_160:
290 case SM_SUN3|SM_3_260:
291 /* these machines have 82586 */
292 break;
293
294 default:
295 return -ENODEV;
296 }
297
298 if (found)
299 return -ENODEV;
300
301 ioaddr = (unsigned long)ioremap(IE_OBIO, SUN3_82586_TOTAL_SIZE);
302 if (!ioaddr)
303 return -ENOMEM;
304 found = 1;
305
306 dev = alloc_etherdev(sizeof(struct priv));
307 if (!dev)
308 goto out;
309 dev->irq = IE_IRQ;
310 dev->base_addr = ioaddr;
311 err = sun3_82586_probe1(dev, ioaddr);
312 if (err)
313 goto out1;
314 err = register_netdev(dev);
315 if (err)
316 goto out2;
317 return 0;
318
319 out2:
320 release_region(ioaddr, SUN3_82586_TOTAL_SIZE);
321 out1:
322 free_netdev(dev);
323 out:
324 iounmap((void __iomem *)ioaddr);
325 return err;
326 }
327 module_init(sun3_82586_probe);
328
329 static const struct net_device_ops sun3_82586_netdev_ops = {
330 .ndo_open = sun3_82586_open,
331 .ndo_stop = sun3_82586_close,
332 .ndo_start_xmit = sun3_82586_send_packet,
333 .ndo_set_rx_mode = set_multicast_list,
334 .ndo_tx_timeout = sun3_82586_timeout,
335 .ndo_get_stats = sun3_82586_get_stats,
336 .ndo_validate_addr = eth_validate_addr,
337 .ndo_set_mac_address = eth_mac_addr,
338 };
339
sun3_82586_probe1(struct net_device * dev,int ioaddr)340 static int __init sun3_82586_probe1(struct net_device *dev,int ioaddr)
341 {
342 int size, retval;
343
344 if (!request_region(ioaddr, SUN3_82586_TOTAL_SIZE, DRV_NAME))
345 return -EBUSY;
346
347 /* copy in the ethernet address from the prom */
348 eth_hw_addr_set(dev, idprom->id_ethaddr);
349
350 printk("%s: SUN3 Intel 82586 found at %lx, ",dev->name,dev->base_addr);
351
352 /*
353 * check (or search) IO-Memory, 32K
354 */
355 size = 0x8000;
356
357 dev->mem_start = (unsigned long)dvma_malloc_align(0x8000, 0x1000);
358 dev->mem_end = dev->mem_start + size;
359
360 if(size != 0x2000 && size != 0x4000 && size != 0x8000) {
361 printk("\n%s: Illegal memory size %d. Allowed is 0x2000 or 0x4000 or 0x8000 bytes.\n",dev->name,size);
362 retval = -ENODEV;
363 goto out;
364 }
365 if(!check586(dev,(char *) dev->mem_start,size)) {
366 printk("?memcheck, Can't find memory at 0x%lx with size %d!\n",dev->mem_start,size);
367 retval = -ENODEV;
368 goto out;
369 }
370
371 ((struct priv *)netdev_priv(dev))->memtop =
372 (char *)dvma_btov(dev->mem_start);
373 ((struct priv *)netdev_priv(dev))->base = (unsigned long) dvma_btov(0);
374 alloc586(dev);
375
376 /* set number of receive-buffs according to memsize */
377 if(size == 0x2000)
378 ((struct priv *)netdev_priv(dev))->num_recv_buffs =
379 NUM_RECV_BUFFS_8;
380 else if(size == 0x4000)
381 ((struct priv *)netdev_priv(dev))->num_recv_buffs =
382 NUM_RECV_BUFFS_16;
383 else
384 ((struct priv *)netdev_priv(dev))->num_recv_buffs =
385 NUM_RECV_BUFFS_32;
386
387 printk("Memaddr: 0x%lx, Memsize: %d, IRQ %d\n",dev->mem_start,size, dev->irq);
388
389 dev->netdev_ops = &sun3_82586_netdev_ops;
390 dev->watchdog_timeo = HZ/20;
391
392 dev->if_port = 0;
393 return 0;
394 out:
395 release_region(ioaddr, SUN3_82586_TOTAL_SIZE);
396 return retval;
397 }
398
399
init586(struct net_device * dev)400 static int init586(struct net_device *dev)
401 {
402 void *ptr;
403 int i,result=0;
404 struct priv *p = netdev_priv(dev);
405 volatile struct configure_cmd_struct *cfg_cmd;
406 volatile struct iasetup_cmd_struct *ias_cmd;
407 volatile struct tdr_cmd_struct *tdr_cmd;
408 volatile struct mcsetup_cmd_struct *mc_cmd;
409 struct netdev_hw_addr *ha;
410 int num_addrs=netdev_mc_count(dev);
411
412 ptr = (void *) ((char *)p->scb + sizeof(struct scb_struct));
413
414 cfg_cmd = (struct configure_cmd_struct *)ptr; /* configure-command */
415 cfg_cmd->cmd_status = 0;
416 cfg_cmd->cmd_cmd = swab16(CMD_CONFIGURE | CMD_LAST);
417 cfg_cmd->cmd_link = 0xffff;
418
419 cfg_cmd->byte_cnt = 0x0a; /* number of cfg bytes */
420 cfg_cmd->fifo = fifo; /* fifo-limit (8=tx:32/rx:64) */
421 cfg_cmd->sav_bf = 0x40; /* hold or discard bad recv frames (bit 7) */
422 cfg_cmd->adr_len = 0x2e; /* addr_len |!src_insert |pre-len |loopback */
423 cfg_cmd->priority = 0x00;
424 cfg_cmd->ifs = 0x60;
425 cfg_cmd->time_low = 0x00;
426 cfg_cmd->time_high = 0xf2;
427 cfg_cmd->promisc = 0;
428 if(dev->flags & IFF_ALLMULTI) {
429 int len = ((char *) p->iscp - (char *) ptr - 8) / 6;
430 if(num_addrs > len) {
431 printk("%s: switching to promisc. mode\n",dev->name);
432 cfg_cmd->promisc = 1;
433 }
434 }
435 if(dev->flags&IFF_PROMISC)
436 cfg_cmd->promisc = 1;
437 cfg_cmd->carr_coll = 0x00;
438
439 p->scb->cbl_offset = make16(cfg_cmd);
440 p->scb->cmd_ruc = 0;
441
442 p->scb->cmd_cuc = CUC_START; /* cmd.-unit start */
443 sun3_attn586();
444
445 WAIT_4_STAT_COMPL(cfg_cmd);
446
447 if((swab16(cfg_cmd->cmd_status) & (STAT_OK|STAT_COMPL)) != (STAT_COMPL|STAT_OK))
448 {
449 printk("%s: configure command failed: %x\n",dev->name,swab16(cfg_cmd->cmd_status));
450 return 1;
451 }
452
453 /*
454 * individual address setup
455 */
456
457 ias_cmd = (struct iasetup_cmd_struct *)ptr;
458
459 ias_cmd->cmd_status = 0;
460 ias_cmd->cmd_cmd = swab16(CMD_IASETUP | CMD_LAST);
461 ias_cmd->cmd_link = 0xffff;
462
463 memcpy((char *)&ias_cmd->iaddr,(const char *) dev->dev_addr,ETH_ALEN);
464
465 p->scb->cbl_offset = make16(ias_cmd);
466
467 p->scb->cmd_cuc = CUC_START; /* cmd.-unit start */
468 sun3_attn586();
469
470 WAIT_4_STAT_COMPL(ias_cmd);
471
472 if((swab16(ias_cmd->cmd_status) & (STAT_OK|STAT_COMPL)) != (STAT_OK|STAT_COMPL)) {
473 printk("%s (82586): individual address setup command failed: %04x\n",dev->name,swab16(ias_cmd->cmd_status));
474 return 1;
475 }
476
477 /*
478 * TDR, wire check .. e.g. no resistor e.t.c
479 */
480
481 tdr_cmd = (struct tdr_cmd_struct *)ptr;
482
483 tdr_cmd->cmd_status = 0;
484 tdr_cmd->cmd_cmd = swab16(CMD_TDR | CMD_LAST);
485 tdr_cmd->cmd_link = 0xffff;
486 tdr_cmd->status = 0;
487
488 p->scb->cbl_offset = make16(tdr_cmd);
489 p->scb->cmd_cuc = CUC_START; /* cmd.-unit start */
490 sun3_attn586();
491
492 WAIT_4_STAT_COMPL(tdr_cmd);
493
494 if(!(swab16(tdr_cmd->cmd_status) & STAT_COMPL))
495 {
496 printk("%s: Problems while running the TDR.\n",dev->name);
497 }
498 else
499 {
500 DELAY_16(); /* wait for result */
501 result = swab16(tdr_cmd->status);
502
503 p->scb->cmd_cuc = p->scb->cus & STAT_MASK;
504 sun3_attn586(); /* ack the interrupts */
505
506 if(result & TDR_LNK_OK)
507 ;
508 else if(result & TDR_XCVR_PRB)
509 printk("%s: TDR: Transceiver problem. Check the cable(s)!\n",dev->name);
510 else if(result & TDR_ET_OPN)
511 printk("%s: TDR: No correct termination %d clocks away.\n",dev->name,result & TDR_TIMEMASK);
512 else if(result & TDR_ET_SRT)
513 {
514 if (result & TDR_TIMEMASK) /* time == 0 -> strange :-) */
515 printk("%s: TDR: Detected a short circuit %d clocks away.\n",dev->name,result & TDR_TIMEMASK);
516 }
517 else
518 printk("%s: TDR: Unknown status %04x\n",dev->name,result);
519 }
520
521 /*
522 * Multicast setup
523 */
524 if(num_addrs && !(dev->flags & IFF_PROMISC) )
525 {
526 mc_cmd = (struct mcsetup_cmd_struct *) ptr;
527 mc_cmd->cmd_status = 0;
528 mc_cmd->cmd_cmd = swab16(CMD_MCSETUP | CMD_LAST);
529 mc_cmd->cmd_link = 0xffff;
530 mc_cmd->mc_cnt = swab16(num_addrs * 6);
531
532 i = 0;
533 netdev_for_each_mc_addr(ha, dev)
534 memcpy((char *) mc_cmd->mc_list[i++],
535 ha->addr, ETH_ALEN);
536
537 p->scb->cbl_offset = make16(mc_cmd);
538 p->scb->cmd_cuc = CUC_START;
539 sun3_attn586();
540
541 WAIT_4_STAT_COMPL(mc_cmd);
542
543 if( (swab16(mc_cmd->cmd_status) & (STAT_COMPL|STAT_OK)) != (STAT_COMPL|STAT_OK) )
544 printk("%s: Can't apply multicast-address-list.\n",dev->name);
545 }
546
547 /*
548 * alloc nop/xmit-cmds
549 */
550 #if (NUM_XMIT_BUFFS == 1)
551 for(i=0;i<2;i++)
552 {
553 p->nop_cmds[i] = (struct nop_cmd_struct *)ptr;
554 p->nop_cmds[i]->cmd_cmd = swab16(CMD_NOP);
555 p->nop_cmds[i]->cmd_status = 0;
556 p->nop_cmds[i]->cmd_link = make16((p->nop_cmds[i]));
557 ptr = (char *) ptr + sizeof(struct nop_cmd_struct);
558 }
559 #else
560 for(i=0;i<NUM_XMIT_BUFFS;i++)
561 {
562 p->nop_cmds[i] = (struct nop_cmd_struct *)ptr;
563 p->nop_cmds[i]->cmd_cmd = swab16(CMD_NOP);
564 p->nop_cmds[i]->cmd_status = 0;
565 p->nop_cmds[i]->cmd_link = make16((p->nop_cmds[i]));
566 ptr = (char *) ptr + sizeof(struct nop_cmd_struct);
567 }
568 #endif
569
570 ptr = alloc_rfa(dev,ptr); /* init receive-frame-area */
571
572 /*
573 * alloc xmit-buffs / init xmit_cmds
574 */
575 for(i=0;i<NUM_XMIT_BUFFS;i++)
576 {
577 p->xmit_cmds[i] = (struct transmit_cmd_struct *)ptr; /*transmit cmd/buff 0*/
578 ptr = (char *) ptr + sizeof(struct transmit_cmd_struct);
579 p->xmit_cbuffs[i] = (char *)ptr; /* char-buffs */
580 ptr = (char *) ptr + XMIT_BUFF_SIZE;
581 p->xmit_buffs[i] = (struct tbd_struct *)ptr; /* TBD */
582 ptr = (char *) ptr + sizeof(struct tbd_struct);
583 if(ptr > (void *)dev->mem_end)
584 {
585 printk("%s: not enough shared-mem for your configuration!\n",dev->name);
586 return 1;
587 }
588 memset((char *)(p->xmit_cmds[i]) ,0, sizeof(struct transmit_cmd_struct));
589 memset((char *)(p->xmit_buffs[i]),0, sizeof(struct tbd_struct));
590 p->xmit_cmds[i]->cmd_link = make16(p->nop_cmds[(i+1)%NUM_XMIT_BUFFS]);
591 p->xmit_cmds[i]->cmd_status = swab16(STAT_COMPL);
592 p->xmit_cmds[i]->cmd_cmd = swab16(CMD_XMIT | CMD_INT);
593 p->xmit_cmds[i]->tbd_offset = make16((p->xmit_buffs[i]));
594 p->xmit_buffs[i]->next = 0xffff;
595 p->xmit_buffs[i]->buffer = make24((p->xmit_cbuffs[i]));
596 }
597
598 p->xmit_count = 0;
599 p->xmit_last = 0;
600 #ifndef NO_NOPCOMMANDS
601 p->nop_point = 0;
602 #endif
603
604 /*
605 * 'start transmitter'
606 */
607 #ifndef NO_NOPCOMMANDS
608 p->scb->cbl_offset = make16(p->nop_cmds[0]);
609 p->scb->cmd_cuc = CUC_START;
610 sun3_attn586();
611 WAIT_4_SCB_CMD();
612 #else
613 p->xmit_cmds[0]->cmd_link = make16(p->xmit_cmds[0]);
614 p->xmit_cmds[0]->cmd_cmd = swab16(CMD_XMIT | CMD_SUSPEND | CMD_INT);
615 #endif
616
617 /*
618 * ack. interrupts
619 */
620 p->scb->cmd_cuc = p->scb->cus & STAT_MASK;
621 sun3_attn586();
622 DELAY_16();
623
624 sun3_enaint();
625 sun3_active();
626
627 return 0;
628 }
629
630 /******************************************************
631 * This is a helper routine for sun3_82586_rnr_int() and init586().
632 * It sets up the Receive Frame Area (RFA).
633 */
634
alloc_rfa(struct net_device * dev,void * ptr)635 static void *alloc_rfa(struct net_device *dev,void *ptr)
636 {
637 volatile struct rfd_struct *rfd = (struct rfd_struct *)ptr;
638 volatile struct rbd_struct *rbd;
639 int i;
640 struct priv *p = netdev_priv(dev);
641
642 memset((char *) rfd,0,sizeof(struct rfd_struct)*(p->num_recv_buffs+rfdadd));
643 p->rfd_first = rfd;
644
645 for(i = 0; i < (p->num_recv_buffs+rfdadd); i++) {
646 rfd[i].next = make16(rfd + (i+1) % (p->num_recv_buffs+rfdadd) );
647 rfd[i].rbd_offset = 0xffff;
648 }
649 rfd[p->num_recv_buffs-1+rfdadd].last = RFD_SUSP; /* RU suspend */
650
651 ptr = (void *) (rfd + (p->num_recv_buffs + rfdadd) );
652
653 rbd = (struct rbd_struct *) ptr;
654 ptr = (void *) (rbd + p->num_recv_buffs);
655
656 /* clr descriptors */
657 memset((char *) rbd,0,sizeof(struct rbd_struct)*(p->num_recv_buffs));
658
659 for(i=0;i<p->num_recv_buffs;i++)
660 {
661 rbd[i].next = make16((rbd + (i+1) % p->num_recv_buffs));
662 rbd[i].size = swab16(RECV_BUFF_SIZE);
663 rbd[i].buffer = make24(ptr);
664 ptr = (char *) ptr + RECV_BUFF_SIZE;
665 }
666
667 p->rfd_top = p->rfd_first;
668 p->rfd_last = p->rfd_first + (p->num_recv_buffs - 1 + rfdadd);
669
670 p->scb->rfa_offset = make16(p->rfd_first);
671 p->rfd_first->rbd_offset = make16(rbd);
672
673 return ptr;
674 }
675
676
677 /**************************************************
678 * Interrupt Handler ...
679 */
680
sun3_82586_interrupt(int irq,void * dev_id)681 static irqreturn_t sun3_82586_interrupt(int irq,void *dev_id)
682 {
683 struct net_device *dev = dev_id;
684 unsigned short stat;
685 int cnt=0;
686 struct priv *p;
687
688 if (!dev) {
689 printk ("sun3_82586-interrupt: irq %d for unknown device.\n",irq);
690 return IRQ_NONE;
691 }
692 p = netdev_priv(dev);
693
694 if(debuglevel > 1)
695 printk("I");
696
697 WAIT_4_SCB_CMD(); /* wait for last command */
698
699 while((stat=p->scb->cus & STAT_MASK))
700 {
701 p->scb->cmd_cuc = stat;
702 sun3_attn586();
703
704 if(stat & STAT_FR) /* received a frame */
705 sun3_82586_rcv_int(dev);
706
707 if(stat & STAT_RNR) /* RU went 'not ready' */
708 {
709 printk("(R)");
710 if(p->scb->rus & RU_SUSPEND) /* special case: RU_SUSPEND */
711 {
712 WAIT_4_SCB_CMD();
713 p->scb->cmd_ruc = RUC_RESUME;
714 sun3_attn586();
715 WAIT_4_SCB_CMD_RUC();
716 }
717 else
718 {
719 printk("%s: Receiver-Unit went 'NOT READY': %04x/%02x.\n",dev->name,(int) stat,(int) p->scb->rus);
720 sun3_82586_rnr_int(dev);
721 }
722 }
723
724 if(stat & STAT_CX) /* command with I-bit set complete */
725 sun3_82586_xmt_int(dev);
726
727 #ifndef NO_NOPCOMMANDS
728 if(stat & STAT_CNA) /* CU went 'not ready' */
729 {
730 if(netif_running(dev))
731 printk("%s: oops! CU has left active state. stat: %04x/%02x.\n",dev->name,(int) stat,(int) p->scb->cus);
732 }
733 #endif
734
735 if(debuglevel > 1)
736 printk("%d",cnt++);
737
738 WAIT_4_SCB_CMD(); /* wait for ack. (sun3_82586_xmt_int can be faster than ack!!) */
739 if(p->scb->cmd_cuc) /* timed out? */
740 {
741 printk("%s: Acknowledge timed out.\n",dev->name);
742 sun3_disint();
743 break;
744 }
745 }
746
747 if(debuglevel > 1)
748 printk("i");
749 return IRQ_HANDLED;
750 }
751
752 /*******************************************************
753 * receive-interrupt
754 */
755
sun3_82586_rcv_int(struct net_device * dev)756 static void sun3_82586_rcv_int(struct net_device *dev)
757 {
758 int status,cnt=0;
759 unsigned short totlen;
760 struct sk_buff *skb;
761 struct rbd_struct *rbd;
762 struct priv *p = netdev_priv(dev);
763
764 if(debuglevel > 0)
765 printk("R");
766
767 for(;(status = p->rfd_top->stat_high) & RFD_COMPL;)
768 {
769 rbd = (struct rbd_struct *) make32(p->rfd_top->rbd_offset);
770
771 if(status & RFD_OK) /* frame received without error? */
772 {
773 if( (totlen = swab16(rbd->status)) & RBD_LAST) /* the first and the last buffer? */
774 {
775 totlen &= RBD_MASK; /* length of this frame */
776 rbd->status = 0;
777 skb = netdev_alloc_skb(dev, totlen + 2);
778 if(skb != NULL)
779 {
780 skb_reserve(skb,2);
781 skb_put(skb,totlen);
782 skb_copy_to_linear_data(skb,(char *) p->base+swab32((unsigned long) rbd->buffer),totlen);
783 skb->protocol=eth_type_trans(skb,dev);
784 netif_rx(skb);
785 dev->stats.rx_packets++;
786 }
787 else
788 dev->stats.rx_dropped++;
789 }
790 else
791 {
792 int rstat;
793 /* free all RBD's until RBD_LAST is set */
794 totlen = 0;
795 while(!((rstat=swab16(rbd->status)) & RBD_LAST))
796 {
797 totlen += rstat & RBD_MASK;
798 if(!rstat)
799 {
800 printk("%s: Whoops .. no end mark in RBD list\n",dev->name);
801 break;
802 }
803 rbd->status = 0;
804 rbd = (struct rbd_struct *) make32(rbd->next);
805 }
806 totlen += rstat & RBD_MASK;
807 rbd->status = 0;
808 printk("%s: received oversized frame! length: %d\n",dev->name,totlen);
809 dev->stats.rx_dropped++;
810 }
811 }
812 else /* frame !(ok), only with 'save-bad-frames' */
813 {
814 printk("%s: oops! rfd-error-status: %04x\n",dev->name,status);
815 dev->stats.rx_errors++;
816 }
817 p->rfd_top->stat_high = 0;
818 p->rfd_top->last = RFD_SUSP; /* maybe exchange by RFD_LAST */
819 p->rfd_top->rbd_offset = 0xffff;
820 p->rfd_last->last = 0; /* delete RFD_SUSP */
821 p->rfd_last = p->rfd_top;
822 p->rfd_top = (struct rfd_struct *) make32(p->rfd_top->next); /* step to next RFD */
823 p->scb->rfa_offset = make16(p->rfd_top);
824
825 if(debuglevel > 0)
826 printk("%d",cnt++);
827 }
828
829 if(automatic_resume)
830 {
831 WAIT_4_SCB_CMD();
832 p->scb->cmd_ruc = RUC_RESUME;
833 sun3_attn586();
834 WAIT_4_SCB_CMD_RUC();
835 }
836
837 #ifdef WAIT_4_BUSY
838 {
839 int i;
840 for(i=0;i<1024;i++)
841 {
842 if(p->rfd_top->status)
843 break;
844 DELAY_16();
845 if(i == 1023)
846 printk("%s: RU hasn't fetched next RFD (not busy/complete)\n",dev->name);
847 }
848 }
849 #endif
850
851 #if 0
852 if(!at_least_one)
853 {
854 int i;
855 volatile struct rfd_struct *rfds=p->rfd_top;
856 volatile struct rbd_struct *rbds;
857 printk("%s: received a FC intr. without having a frame: %04x %d\n",dev->name,status,old_at_least);
858 for(i=0;i< (p->num_recv_buffs+4);i++)
859 {
860 rbds = (struct rbd_struct *) make32(rfds->rbd_offset);
861 printk("%04x:%04x ",rfds->status,rbds->status);
862 rfds = (struct rfd_struct *) make32(rfds->next);
863 }
864 printk("\nerrs: %04x %04x stat: %04x\n",(int)p->scb->rsc_errs,(int)p->scb->ovrn_errs,(int)p->scb->status);
865 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);
866 }
867 old_at_least = at_least_one;
868 #endif
869
870 if(debuglevel > 0)
871 printk("r");
872 }
873
874 /**********************************************************
875 * handle 'Receiver went not ready'.
876 */
877
sun3_82586_rnr_int(struct net_device * dev)878 static void sun3_82586_rnr_int(struct net_device *dev)
879 {
880 struct priv *p = netdev_priv(dev);
881
882 dev->stats.rx_errors++;
883
884 WAIT_4_SCB_CMD(); /* wait for the last cmd, WAIT_4_FULLSTAT?? */
885 p->scb->cmd_ruc = RUC_ABORT; /* usually the RU is in the 'no resource'-state .. abort it now. */
886 sun3_attn586();
887 WAIT_4_SCB_CMD_RUC(); /* wait for accept cmd. */
888
889 alloc_rfa(dev,(char *)p->rfd_first);
890 /* maybe add a check here, before restarting the RU */
891 startrecv586(dev); /* restart RU */
892
893 printk("%s: Receive-Unit restarted. Status: %04x\n",dev->name,p->scb->rus);
894
895 }
896
897 /**********************************************************
898 * handle xmit - interrupt
899 */
900
sun3_82586_xmt_int(struct net_device * dev)901 static void sun3_82586_xmt_int(struct net_device *dev)
902 {
903 int status;
904 struct priv *p = netdev_priv(dev);
905
906 if(debuglevel > 0)
907 printk("X");
908
909 status = swab16(p->xmit_cmds[p->xmit_last]->cmd_status);
910 if(!(status & STAT_COMPL))
911 printk("%s: strange .. xmit-int without a 'COMPLETE'\n",dev->name);
912
913 if(status & STAT_OK)
914 {
915 dev->stats.tx_packets++;
916 dev->stats.collisions += (status & TCMD_MAXCOLLMASK);
917 }
918 else
919 {
920 dev->stats.tx_errors++;
921 if(status & TCMD_LATECOLL) {
922 printk("%s: late collision detected.\n",dev->name);
923 dev->stats.collisions++;
924 }
925 else if(status & TCMD_NOCARRIER) {
926 dev->stats.tx_carrier_errors++;
927 printk("%s: no carrier detected.\n",dev->name);
928 }
929 else if(status & TCMD_LOSTCTS)
930 printk("%s: loss of CTS detected.\n",dev->name);
931 else if(status & TCMD_UNDERRUN) {
932 dev->stats.tx_fifo_errors++;
933 printk("%s: DMA underrun detected.\n",dev->name);
934 }
935 else if(status & TCMD_MAXCOLL) {
936 printk("%s: Max. collisions exceeded.\n",dev->name);
937 dev->stats.collisions += 16;
938 }
939 }
940
941 #if (NUM_XMIT_BUFFS > 1)
942 if( (++p->xmit_last) == NUM_XMIT_BUFFS)
943 p->xmit_last = 0;
944 #endif
945 netif_wake_queue(dev);
946 }
947
948 /***********************************************************
949 * (re)start the receiver
950 */
951
startrecv586(struct net_device * dev)952 static void startrecv586(struct net_device *dev)
953 {
954 struct priv *p = netdev_priv(dev);
955
956 WAIT_4_SCB_CMD();
957 WAIT_4_SCB_CMD_RUC();
958 p->scb->rfa_offset = make16(p->rfd_first);
959 p->scb->cmd_ruc = RUC_START;
960 sun3_attn586(); /* start cmd. */
961 WAIT_4_SCB_CMD_RUC(); /* wait for accept cmd. (no timeout!!) */
962 }
963
sun3_82586_timeout(struct net_device * dev,unsigned int txqueue)964 static void sun3_82586_timeout(struct net_device *dev, unsigned int txqueue)
965 {
966 struct priv *p = netdev_priv(dev);
967 #ifndef NO_NOPCOMMANDS
968 if(p->scb->cus & CU_ACTIVE) /* COMMAND-UNIT active? */
969 {
970 netif_wake_queue(dev);
971 #ifdef DEBUG
972 printk("%s: strange ... timeout with CU active?!?\n",dev->name);
973 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);
974 #endif
975 p->scb->cmd_cuc = CUC_ABORT;
976 sun3_attn586();
977 WAIT_4_SCB_CMD();
978 p->scb->cbl_offset = make16(p->nop_cmds[p->nop_point]);
979 p->scb->cmd_cuc = CUC_START;
980 sun3_attn586();
981 WAIT_4_SCB_CMD();
982 netif_trans_update(dev); /* prevent tx timeout */
983 return 0;
984 }
985 #endif
986 {
987 #ifdef DEBUG
988 printk("%s: xmitter timed out, try to restart! stat: %02x\n",dev->name,p->scb->cus);
989 printk("%s: command-stats: %04x %04x\n",dev->name,swab16(p->xmit_cmds[0]->cmd_status),swab16(p->xmit_cmds[1]->cmd_status));
990 printk("%s: check, whether you set the right interrupt number!\n",dev->name);
991 #endif
992 sun3_82586_close(dev);
993 sun3_82586_open(dev);
994 }
995 netif_trans_update(dev); /* prevent tx timeout */
996 }
997
998 /******************************************************
999 * send frame
1000 */
1001
1002 static netdev_tx_t
sun3_82586_send_packet(struct sk_buff * skb,struct net_device * dev)1003 sun3_82586_send_packet(struct sk_buff *skb, struct net_device *dev)
1004 {
1005 int len,i;
1006 #ifndef NO_NOPCOMMANDS
1007 int next_nop;
1008 #endif
1009 struct priv *p = netdev_priv(dev);
1010
1011 if(skb->len > XMIT_BUFF_SIZE)
1012 {
1013 printk("%s: Sorry, max. framelength is %d bytes. The length of your frame is %d bytes.\n",dev->name,XMIT_BUFF_SIZE,skb->len);
1014 return NETDEV_TX_OK;
1015 }
1016
1017 netif_stop_queue(dev);
1018
1019 #if(NUM_XMIT_BUFFS > 1)
1020 if(test_and_set_bit(0,(void *) &p->lock)) {
1021 printk("%s: Queue was locked\n",dev->name);
1022 return NETDEV_TX_BUSY;
1023 }
1024 else
1025 #endif
1026 {
1027 len = skb->len;
1028 if (len < ETH_ZLEN) {
1029 memset((void *)p->xmit_cbuffs[p->xmit_count], 0,
1030 ETH_ZLEN);
1031 len = ETH_ZLEN;
1032 }
1033 skb_copy_from_linear_data(skb, (void *)p->xmit_cbuffs[p->xmit_count], skb->len);
1034
1035 #if (NUM_XMIT_BUFFS == 1)
1036 # ifdef NO_NOPCOMMANDS
1037
1038 #ifdef DEBUG
1039 if(p->scb->cus & CU_ACTIVE)
1040 {
1041 printk("%s: Hmmm .. CU is still running and we wanna send a new packet.\n",dev->name);
1042 printk("%s: stat: %04x %04x\n",dev->name,p->scb->cus,swab16(p->xmit_cmds[0]->cmd_status));
1043 }
1044 #endif
1045
1046 p->xmit_buffs[0]->size = swab16(TBD_LAST | len);
1047 for(i=0;i<16;i++)
1048 {
1049 p->xmit_cmds[0]->cmd_status = 0;
1050 WAIT_4_SCB_CMD();
1051 if( (p->scb->cus & CU_STATUS) == CU_SUSPEND)
1052 p->scb->cmd_cuc = CUC_RESUME;
1053 else
1054 {
1055 p->scb->cbl_offset = make16(p->xmit_cmds[0]);
1056 p->scb->cmd_cuc = CUC_START;
1057 }
1058
1059 sun3_attn586();
1060 if(!i)
1061 dev_kfree_skb(skb);
1062 WAIT_4_SCB_CMD();
1063 if( (p->scb->cus & CU_ACTIVE)) /* test it, because CU sometimes doesn't start immediately */
1064 break;
1065 if(p->xmit_cmds[0]->cmd_status)
1066 break;
1067 if(i==15)
1068 printk("%s: Can't start transmit-command.\n",dev->name);
1069 }
1070 # else
1071 next_nop = (p->nop_point + 1) & 0x1;
1072 p->xmit_buffs[0]->size = swab16(TBD_LAST | len);
1073
1074 p->xmit_cmds[0]->cmd_link = p->nop_cmds[next_nop]->cmd_link
1075 = make16((p->nop_cmds[next_nop]));
1076 p->xmit_cmds[0]->cmd_status = p->nop_cmds[next_nop]->cmd_status = 0;
1077
1078 p->nop_cmds[p->nop_point]->cmd_link = make16((p->xmit_cmds[0]));
1079 p->nop_point = next_nop;
1080 dev_kfree_skb(skb);
1081 # endif
1082 #else
1083 p->xmit_buffs[p->xmit_count]->size = swab16(TBD_LAST | len);
1084 if( (next_nop = p->xmit_count + 1) == NUM_XMIT_BUFFS )
1085 next_nop = 0;
1086
1087 p->xmit_cmds[p->xmit_count]->cmd_status = 0;
1088 /* linkpointer of xmit-command already points to next nop cmd */
1089 p->nop_cmds[next_nop]->cmd_link = make16((p->nop_cmds[next_nop]));
1090 p->nop_cmds[next_nop]->cmd_status = 0;
1091
1092 p->nop_cmds[p->xmit_count]->cmd_link = make16((p->xmit_cmds[p->xmit_count]));
1093 p->xmit_count = next_nop;
1094
1095 {
1096 unsigned long flags;
1097 local_irq_save(flags);
1098 if(p->xmit_count != p->xmit_last)
1099 netif_wake_queue(dev);
1100 p->lock = 0;
1101 local_irq_restore(flags);
1102 }
1103 dev_kfree_skb(skb);
1104 #endif
1105 }
1106 return NETDEV_TX_OK;
1107 }
1108
1109 /*******************************************
1110 * Someone wanna have the statistics
1111 */
1112
sun3_82586_get_stats(struct net_device * dev)1113 static struct net_device_stats *sun3_82586_get_stats(struct net_device *dev)
1114 {
1115 struct priv *p = netdev_priv(dev);
1116 unsigned short crc,aln,rsc,ovrn;
1117
1118 crc = swab16(p->scb->crc_errs); /* get error-statistic from the ni82586 */
1119 p->scb->crc_errs = 0;
1120 aln = swab16(p->scb->aln_errs);
1121 p->scb->aln_errs = 0;
1122 rsc = swab16(p->scb->rsc_errs);
1123 p->scb->rsc_errs = 0;
1124 ovrn = swab16(p->scb->ovrn_errs);
1125 p->scb->ovrn_errs = 0;
1126
1127 dev->stats.rx_crc_errors += crc;
1128 dev->stats.rx_fifo_errors += ovrn;
1129 dev->stats.rx_frame_errors += aln;
1130 dev->stats.rx_dropped += rsc;
1131
1132 return &dev->stats;
1133 }
1134
1135 /********************************************************
1136 * Set MC list ..
1137 */
1138
set_multicast_list(struct net_device * dev)1139 static void set_multicast_list(struct net_device *dev)
1140 {
1141 netif_stop_queue(dev);
1142 sun3_disint();
1143 alloc586(dev);
1144 init586(dev);
1145 startrecv586(dev);
1146 sun3_enaint();
1147 netif_wake_queue(dev);
1148 }
1149
1150 #if 0
1151 /*
1152 * DUMP .. we expect a not running CMD unit and enough space
1153 */
1154 void sun3_82586_dump(struct net_device *dev,void *ptr)
1155 {
1156 struct priv *p = netdev_priv(dev);
1157 struct dump_cmd_struct *dump_cmd = (struct dump_cmd_struct *) ptr;
1158 int i;
1159
1160 p->scb->cmd_cuc = CUC_ABORT;
1161 sun3_attn586();
1162 WAIT_4_SCB_CMD();
1163 WAIT_4_SCB_CMD_RUC();
1164
1165 dump_cmd->cmd_status = 0;
1166 dump_cmd->cmd_cmd = CMD_DUMP | CMD_LAST;
1167 dump_cmd->dump_offset = make16((dump_cmd + 1));
1168 dump_cmd->cmd_link = 0xffff;
1169
1170 p->scb->cbl_offset = make16(dump_cmd);
1171 p->scb->cmd_cuc = CUC_START;
1172 sun3_attn586();
1173 WAIT_4_STAT_COMPL(dump_cmd);
1174
1175 if( (dump_cmd->cmd_status & (STAT_COMPL|STAT_OK)) != (STAT_COMPL|STAT_OK) )
1176 printk("%s: Can't get dump information.\n",dev->name);
1177
1178 for(i=0;i<170;i++) {
1179 printk("%02x ",(int) ((unsigned char *) (dump_cmd + 1))[i]);
1180 if(i % 24 == 23)
1181 printk("\n");
1182 }
1183 printk("\n");
1184 }
1185 #endif
1186