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/string.h>
33 #include <linux/errno.h>
34 #include <linux/ioport.h>
35 #include <linux/interrupt.h>
36 #include <linux/delay.h>
37 #include <linux/init.h>
38 #include <linux/bitops.h>
39 #include <asm/io.h>
40 #include <asm/idprom.h>
41 #include <asm/machines.h>
42 #include <asm/sun3mmu.h>
43 #include <asm/dvma.h>
44 #include <asm/byteorder.h>
45
46 #include <linux/netdevice.h>
47 #include <linux/etherdevice.h>
48 #include <linux/skbuff.h>
49
50 #include "sun3_82586.h"
51
52 #define DRV_NAME "sun3_82586"
53
54 #define DEBUG /* debug on */
55 #define SYSBUSVAL 0 /* 16 Bit */
56 #define SUN3_82586_TOTAL_SIZE PAGE_SIZE
57
58 #define sun3_attn586() {*(volatile unsigned char *)(dev->base_addr) |= IEOB_ATTEN; *(volatile unsigned char *)(dev->base_addr) &= ~IEOB_ATTEN;}
59 #define sun3_reset586() {*(volatile unsigned char *)(dev->base_addr) = 0; udelay(100); *(volatile unsigned char *)(dev->base_addr) = IEOB_NORSET;}
60 #define sun3_disint() {*(volatile unsigned char *)(dev->base_addr) &= ~IEOB_IENAB;}
61 #define sun3_enaint() {*(volatile unsigned char *)(dev->base_addr) |= IEOB_IENAB;}
62 #define sun3_active() {*(volatile unsigned char *)(dev->base_addr) |= (IEOB_IENAB|IEOB_ONAIR|IEOB_NORSET);}
63
64 #define make32(ptr16) (p->memtop + (swab16((unsigned short) (ptr16))) )
65 #define make24(ptr32) (char *)swab32(( ((unsigned long) (ptr32)) - p->base))
66 #define make16(ptr32) (swab16((unsigned short) ((unsigned long)(ptr32) - (unsigned long) p->memtop )))
67
68 /******************* how to calculate the buffers *****************************
69
70 * IMPORTANT NOTE: if you configure only one NUM_XMIT_BUFFS, the driver works
71 * --------------- in a different (more stable?) mode. Only in this mode it's
72 * possible to configure the driver with 'NO_NOPCOMMANDS'
73
74 sizeof(scp)=12; sizeof(scb)=16; sizeof(iscp)=8;
75 sizeof(scp)+sizeof(iscp)+sizeof(scb) = 36 = INIT
76 sizeof(rfd) = 24; sizeof(rbd) = 12;
77 sizeof(tbd) = 8; sizeof(transmit_cmd) = 16;
78 sizeof(nop_cmd) = 8;
79
80 * if you don't know the driver, better do not change these values: */
81
82 #define RECV_BUFF_SIZE 1536 /* slightly oversized */
83 #define XMIT_BUFF_SIZE 1536 /* slightly oversized */
84 #define NUM_XMIT_BUFFS 1 /* config for 32K shmem */
85 #define NUM_RECV_BUFFS_8 4 /* config for 32K shared mem */
86 #define NUM_RECV_BUFFS_16 9 /* config for 32K shared mem */
87 #define NUM_RECV_BUFFS_32 16 /* config for 32K shared mem */
88 #define NO_NOPCOMMANDS /* only possible with NUM_XMIT_BUFFS=1 */
89
90 /**************************************************************************/
91
92 /* different DELAYs */
93 #define DELAY(x) mdelay(32 * x);
94 #define DELAY_16(); { udelay(16); }
95 #define DELAY_18(); { udelay(4); }
96
97 /* wait for command with timeout: */
98 #define WAIT_4_SCB_CMD() \
99 { int i; \
100 for(i=0;i<16384;i++) { \
101 if(!p->scb->cmd_cuc) break; \
102 DELAY_18(); \
103 if(i == 16383) { \
104 printk("%s: scb_cmd timed out: %04x,%04x .. disabling i82586!!\n",dev->name,p->scb->cmd_cuc,p->scb->cus); \
105 if(!p->reseted) { p->reseted = 1; sun3_reset586(); } } } }
106
107 #define WAIT_4_SCB_CMD_RUC() { int i; \
108 for(i=0;i<16384;i++) { \
109 if(!p->scb->cmd_ruc) break; \
110 DELAY_18(); \
111 if(i == 16383) { \
112 printk("%s: scb_cmd (ruc) timed out: %04x,%04x .. disabling i82586!!\n",dev->name,p->scb->cmd_ruc,p->scb->rus); \
113 if(!p->reseted) { p->reseted = 1; sun3_reset586(); } } } }
114
115 #define WAIT_4_STAT_COMPL(addr) { int i; \
116 for(i=0;i<32767;i++) { \
117 if(swab16((addr)->cmd_status) & STAT_COMPL) break; \
118 DELAY_16(); DELAY_16(); } }
119
120 static int sun3_82586_probe1(struct net_device *dev,int ioaddr);
121 static irqreturn_t sun3_82586_interrupt(int irq,void *dev_id);
122 static int sun3_82586_open(struct net_device *dev);
123 static int sun3_82586_close(struct net_device *dev);
124 static int sun3_82586_send_packet(struct sk_buff *,struct net_device *);
125 static struct net_device_stats *sun3_82586_get_stats(struct net_device *dev);
126 static void set_multicast_list(struct net_device *dev);
127 static void sun3_82586_timeout(struct net_device *dev);
128 #if 0
129 static void sun3_82586_dump(struct net_device *,void *);
130 #endif
131
132 /* helper-functions */
133 static int init586(struct net_device *dev);
134 static int check586(struct net_device *dev,char *where,unsigned size);
135 static void alloc586(struct net_device *dev);
136 static void startrecv586(struct net_device *dev);
137 static void *alloc_rfa(struct net_device *dev,void *ptr);
138 static void sun3_82586_rcv_int(struct net_device *dev);
139 static void sun3_82586_xmt_int(struct net_device *dev);
140 static void sun3_82586_rnr_int(struct net_device *dev);
141
142 struct priv
143 {
144 unsigned long base;
145 char *memtop;
146 long int lock;
147 int reseted;
148 volatile struct rfd_struct *rfd_last,*rfd_top,*rfd_first;
149 volatile struct scp_struct *scp; /* volatile is important */
150 volatile struct iscp_struct *iscp; /* volatile is important */
151 volatile struct scb_struct *scb; /* volatile is important */
152 volatile struct tbd_struct *xmit_buffs[NUM_XMIT_BUFFS];
153 volatile struct transmit_cmd_struct *xmit_cmds[NUM_XMIT_BUFFS];
154 #if (NUM_XMIT_BUFFS == 1)
155 volatile struct nop_cmd_struct *nop_cmds[2];
156 #else
157 volatile struct nop_cmd_struct *nop_cmds[NUM_XMIT_BUFFS];
158 #endif
159 volatile int nop_point,num_recv_buffs;
160 volatile char *xmit_cbuffs[NUM_XMIT_BUFFS];
161 volatile int xmit_count,xmit_last;
162 };
163
164 /**********************************************
165 * close device
166 */
sun3_82586_close(struct net_device * dev)167 static int sun3_82586_close(struct net_device *dev)
168 {
169 free_irq(dev->irq, dev);
170
171 sun3_reset586(); /* the hard way to stop the receiver */
172
173 netif_stop_queue(dev);
174
175 return 0;
176 }
177
178 /**********************************************
179 * open device
180 */
sun3_82586_open(struct net_device * dev)181 static int sun3_82586_open(struct net_device *dev)
182 {
183 int ret;
184
185 sun3_disint();
186 alloc586(dev);
187 init586(dev);
188 startrecv586(dev);
189 sun3_enaint();
190
191 ret = request_irq(dev->irq, sun3_82586_interrupt,0,dev->name,dev);
192 if (ret)
193 {
194 sun3_reset586();
195 return ret;
196 }
197
198 netif_start_queue(dev);
199
200 return 0; /* most done by init */
201 }
202
203 /**********************************************
204 * Check to see if there's an 82586 out there.
205 */
check586(struct net_device * dev,char * where,unsigned size)206 static int check586(struct net_device *dev,char *where,unsigned size)
207 {
208 struct priv pb;
209 struct priv *p = &pb;
210 char *iscp_addr;
211 int i;
212
213 p->base = (unsigned long) dvma_btov(0);
214 p->memtop = (char *)dvma_btov((unsigned long)where);
215 p->scp = (struct scp_struct *)(p->base + SCP_DEFAULT_ADDRESS);
216 memset((char *)p->scp,0, sizeof(struct scp_struct));
217 for(i=0;i<sizeof(struct scp_struct);i++) /* memory was writeable? */
218 if(((char *)p->scp)[i])
219 return 0;
220 p->scp->sysbus = SYSBUSVAL; /* 1 = 8Bit-Bus, 0 = 16 Bit */
221 if(p->scp->sysbus != SYSBUSVAL)
222 return 0;
223
224 iscp_addr = (char *)dvma_btov((unsigned long)where);
225
226 p->iscp = (struct iscp_struct *) iscp_addr;
227 memset((char *)p->iscp,0, sizeof(struct iscp_struct));
228
229 p->scp->iscp = make24(p->iscp);
230 p->iscp->busy = 1;
231
232 sun3_reset586();
233 sun3_attn586();
234 DELAY(1); /* wait a while... */
235
236 if(p->iscp->busy) /* i82586 clears 'busy' after successful init */
237 return 0;
238
239 return 1;
240 }
241
242 /******************************************************************
243 * set iscp at the right place, called by sun3_82586_probe1 and open586.
244 */
alloc586(struct net_device * dev)245 static void alloc586(struct net_device *dev)
246 {
247 struct priv *p = netdev_priv(dev);
248
249 sun3_reset586();
250 DELAY(1);
251
252 p->scp = (struct scp_struct *) (p->base + SCP_DEFAULT_ADDRESS);
253 p->iscp = (struct iscp_struct *) dvma_btov(dev->mem_start);
254 p->scb = (struct scb_struct *) ((char *)p->iscp + sizeof(struct iscp_struct));
255
256 memset((char *) p->iscp,0,sizeof(struct iscp_struct));
257 memset((char *) p->scp ,0,sizeof(struct scp_struct));
258
259 p->scp->iscp = make24(p->iscp);
260 p->scp->sysbus = SYSBUSVAL;
261 p->iscp->scb_offset = make16(p->scb);
262 p->iscp->scb_base = make24(dvma_btov(dev->mem_start));
263
264 p->iscp->busy = 1;
265 sun3_reset586();
266 sun3_attn586();
267
268 DELAY(1);
269
270 if(p->iscp->busy)
271 printk("%s: Init-Problems (alloc).\n",dev->name);
272
273 p->reseted = 0;
274
275 memset((char *)p->scb,0,sizeof(struct scb_struct));
276 }
277
sun3_82586_probe(int unit)278 struct net_device * __init sun3_82586_probe(int unit)
279 {
280 struct net_device *dev;
281 unsigned long ioaddr;
282 static int found = 0;
283 int err = -ENOMEM;
284
285 /* check that this machine has an onboard 82586 */
286 switch(idprom->id_machtype) {
287 case SM_SUN3|SM_3_160:
288 case SM_SUN3|SM_3_260:
289 /* these machines have 82586 */
290 break;
291
292 default:
293 return ERR_PTR(-ENODEV);
294 }
295
296 if (found)
297 return ERR_PTR(-ENODEV);
298
299 ioaddr = (unsigned long)ioremap(IE_OBIO, SUN3_82586_TOTAL_SIZE);
300 if (!ioaddr)
301 return ERR_PTR(-ENOMEM);
302 found = 1;
303
304 dev = alloc_etherdev(sizeof(struct priv));
305 if (!dev)
306 goto out;
307 if (unit >= 0) {
308 sprintf(dev->name, "eth%d", unit);
309 netdev_boot_setup_check(dev);
310 }
311
312 dev->irq = IE_IRQ;
313 dev->base_addr = ioaddr;
314 err = sun3_82586_probe1(dev, ioaddr);
315 if (err)
316 goto out1;
317 err = register_netdev(dev);
318 if (err)
319 goto out2;
320 return dev;
321
322 out2:
323 release_region(ioaddr, SUN3_82586_TOTAL_SIZE);
324 out1:
325 free_netdev(dev);
326 out:
327 iounmap((void __iomem *)ioaddr);
328 return ERR_PTR(err);
329 }
330
331 static const struct net_device_ops sun3_82586_netdev_ops = {
332 .ndo_open = sun3_82586_open,
333 .ndo_stop = sun3_82586_close,
334 .ndo_start_xmit = sun3_82586_send_packet,
335 .ndo_set_rx_mode = set_multicast_list,
336 .ndo_tx_timeout = sun3_82586_timeout,
337 .ndo_get_stats = sun3_82586_get_stats,
338 .ndo_validate_addr = eth_validate_addr,
339 .ndo_set_mac_address = eth_mac_addr,
340 .ndo_change_mtu = eth_change_mtu,
341 };
342
sun3_82586_probe1(struct net_device * dev,int ioaddr)343 static int __init sun3_82586_probe1(struct net_device *dev,int ioaddr)
344 {
345 int i, size, retval;
346
347 if (!request_region(ioaddr, SUN3_82586_TOTAL_SIZE, DRV_NAME))
348 return -EBUSY;
349
350 /* copy in the ethernet address from the prom */
351 for(i = 0; i < 6 ; i++)
352 dev->dev_addr[i] = idprom->id_ethaddr[i];
353
354 printk("%s: SUN3 Intel 82586 found at %lx, ",dev->name,dev->base_addr);
355
356 /*
357 * check (or search) IO-Memory, 32K
358 */
359 size = 0x8000;
360
361 dev->mem_start = (unsigned long)dvma_malloc_align(0x8000, 0x1000);
362 dev->mem_end = dev->mem_start + size;
363
364 if(size != 0x2000 && size != 0x4000 && size != 0x8000) {
365 printk("\n%s: Illegal memory size %d. Allowed is 0x2000 or 0x4000 or 0x8000 bytes.\n",dev->name,size);
366 retval = -ENODEV;
367 goto out;
368 }
369 if(!check586(dev,(char *) dev->mem_start,size)) {
370 printk("?memcheck, Can't find memory at 0x%lx with size %d!\n",dev->mem_start,size);
371 retval = -ENODEV;
372 goto out;
373 }
374
375 ((struct priv *)netdev_priv(dev))->memtop =
376 (char *)dvma_btov(dev->mem_start);
377 ((struct priv *)netdev_priv(dev))->base = (unsigned long) dvma_btov(0);
378 alloc586(dev);
379
380 /* set number of receive-buffs according to memsize */
381 if(size == 0x2000)
382 ((struct priv *)netdev_priv(dev))->num_recv_buffs =
383 NUM_RECV_BUFFS_8;
384 else if(size == 0x4000)
385 ((struct priv *)netdev_priv(dev))->num_recv_buffs =
386 NUM_RECV_BUFFS_16;
387 else
388 ((struct priv *)netdev_priv(dev))->num_recv_buffs =
389 NUM_RECV_BUFFS_32;
390
391 printk("Memaddr: 0x%lx, Memsize: %d, IRQ %d\n",dev->mem_start,size, dev->irq);
392
393 dev->netdev_ops = &sun3_82586_netdev_ops;
394 dev->watchdog_timeo = HZ/20;
395
396 dev->if_port = 0;
397 return 0;
398 out:
399 release_region(ioaddr, SUN3_82586_TOTAL_SIZE);
400 return retval;
401 }
402
403
init586(struct net_device * dev)404 static int init586(struct net_device *dev)
405 {
406 void *ptr;
407 int i,result=0;
408 struct priv *p = netdev_priv(dev);
409 volatile struct configure_cmd_struct *cfg_cmd;
410 volatile struct iasetup_cmd_struct *ias_cmd;
411 volatile struct tdr_cmd_struct *tdr_cmd;
412 volatile struct mcsetup_cmd_struct *mc_cmd;
413 struct netdev_hw_addr *ha;
414 int num_addrs=netdev_mc_count(dev);
415
416 ptr = (void *) ((char *)p->scb + sizeof(struct scb_struct));
417
418 cfg_cmd = (struct configure_cmd_struct *)ptr; /* configure-command */
419 cfg_cmd->cmd_status = 0;
420 cfg_cmd->cmd_cmd = swab16(CMD_CONFIGURE | CMD_LAST);
421 cfg_cmd->cmd_link = 0xffff;
422
423 cfg_cmd->byte_cnt = 0x0a; /* number of cfg bytes */
424 cfg_cmd->fifo = fifo; /* fifo-limit (8=tx:32/rx:64) */
425 cfg_cmd->sav_bf = 0x40; /* hold or discard bad recv frames (bit 7) */
426 cfg_cmd->adr_len = 0x2e; /* addr_len |!src_insert |pre-len |loopback */
427 cfg_cmd->priority = 0x00;
428 cfg_cmd->ifs = 0x60;
429 cfg_cmd->time_low = 0x00;
430 cfg_cmd->time_high = 0xf2;
431 cfg_cmd->promisc = 0;
432 if(dev->flags & IFF_ALLMULTI) {
433 int len = ((char *) p->iscp - (char *) ptr - 8) / 6;
434 if(num_addrs > len) {
435 printk("%s: switching to promisc. mode\n",dev->name);
436 cfg_cmd->promisc = 1;
437 }
438 }
439 if(dev->flags&IFF_PROMISC)
440 cfg_cmd->promisc = 1;
441 cfg_cmd->carr_coll = 0x00;
442
443 p->scb->cbl_offset = make16(cfg_cmd);
444 p->scb->cmd_ruc = 0;
445
446 p->scb->cmd_cuc = CUC_START; /* cmd.-unit start */
447 sun3_attn586();
448
449 WAIT_4_STAT_COMPL(cfg_cmd);
450
451 if((swab16(cfg_cmd->cmd_status) & (STAT_OK|STAT_COMPL)) != (STAT_COMPL|STAT_OK))
452 {
453 printk("%s: configure command failed: %x\n",dev->name,swab16(cfg_cmd->cmd_status));
454 return 1;
455 }
456
457 /*
458 * individual address setup
459 */
460
461 ias_cmd = (struct iasetup_cmd_struct *)ptr;
462
463 ias_cmd->cmd_status = 0;
464 ias_cmd->cmd_cmd = swab16(CMD_IASETUP | CMD_LAST);
465 ias_cmd->cmd_link = 0xffff;
466
467 memcpy((char *)&ias_cmd->iaddr,(char *) dev->dev_addr,ETH_ALEN);
468
469 p->scb->cbl_offset = make16(ias_cmd);
470
471 p->scb->cmd_cuc = CUC_START; /* cmd.-unit start */
472 sun3_attn586();
473
474 WAIT_4_STAT_COMPL(ias_cmd);
475
476 if((swab16(ias_cmd->cmd_status) & (STAT_OK|STAT_COMPL)) != (STAT_OK|STAT_COMPL)) {
477 printk("%s (82586): individual address setup command failed: %04x\n",dev->name,swab16(ias_cmd->cmd_status));
478 return 1;
479 }
480
481 /*
482 * TDR, wire check .. e.g. no resistor e.t.c
483 */
484
485 tdr_cmd = (struct tdr_cmd_struct *)ptr;
486
487 tdr_cmd->cmd_status = 0;
488 tdr_cmd->cmd_cmd = swab16(CMD_TDR | CMD_LAST);
489 tdr_cmd->cmd_link = 0xffff;
490 tdr_cmd->status = 0;
491
492 p->scb->cbl_offset = make16(tdr_cmd);
493 p->scb->cmd_cuc = CUC_START; /* cmd.-unit start */
494 sun3_attn586();
495
496 WAIT_4_STAT_COMPL(tdr_cmd);
497
498 if(!(swab16(tdr_cmd->cmd_status) & STAT_COMPL))
499 {
500 printk("%s: Problems while running the TDR.\n",dev->name);
501 }
502 else
503 {
504 DELAY_16(); /* wait for result */
505 result = swab16(tdr_cmd->status);
506
507 p->scb->cmd_cuc = p->scb->cus & STAT_MASK;
508 sun3_attn586(); /* ack the interrupts */
509
510 if(result & TDR_LNK_OK)
511 ;
512 else if(result & TDR_XCVR_PRB)
513 printk("%s: TDR: Transceiver problem. Check the cable(s)!\n",dev->name);
514 else if(result & TDR_ET_OPN)
515 printk("%s: TDR: No correct termination %d clocks away.\n",dev->name,result & TDR_TIMEMASK);
516 else if(result & TDR_ET_SRT)
517 {
518 if (result & TDR_TIMEMASK) /* time == 0 -> strange :-) */
519 printk("%s: TDR: Detected a short circuit %d clocks away.\n",dev->name,result & TDR_TIMEMASK);
520 }
521 else
522 printk("%s: TDR: Unknown status %04x\n",dev->name,result);
523 }
524
525 /*
526 * Multicast setup
527 */
528 if(num_addrs && !(dev->flags & IFF_PROMISC) )
529 {
530 mc_cmd = (struct mcsetup_cmd_struct *) ptr;
531 mc_cmd->cmd_status = 0;
532 mc_cmd->cmd_cmd = swab16(CMD_MCSETUP | CMD_LAST);
533 mc_cmd->cmd_link = 0xffff;
534 mc_cmd->mc_cnt = swab16(num_addrs * 6);
535
536 i = 0;
537 netdev_for_each_mc_addr(ha, dev)
538 memcpy((char *) mc_cmd->mc_list[i++],
539 ha->addr, ETH_ALEN);
540
541 p->scb->cbl_offset = make16(mc_cmd);
542 p->scb->cmd_cuc = CUC_START;
543 sun3_attn586();
544
545 WAIT_4_STAT_COMPL(mc_cmd);
546
547 if( (swab16(mc_cmd->cmd_status) & (STAT_COMPL|STAT_OK)) != (STAT_COMPL|STAT_OK) )
548 printk("%s: Can't apply multicast-address-list.\n",dev->name);
549 }
550
551 /*
552 * alloc nop/xmit-cmds
553 */
554 #if (NUM_XMIT_BUFFS == 1)
555 for(i=0;i<2;i++)
556 {
557 p->nop_cmds[i] = (struct nop_cmd_struct *)ptr;
558 p->nop_cmds[i]->cmd_cmd = swab16(CMD_NOP);
559 p->nop_cmds[i]->cmd_status = 0;
560 p->nop_cmds[i]->cmd_link = make16((p->nop_cmds[i]));
561 ptr = (char *) ptr + sizeof(struct nop_cmd_struct);
562 }
563 #else
564 for(i=0;i<NUM_XMIT_BUFFS;i++)
565 {
566 p->nop_cmds[i] = (struct nop_cmd_struct *)ptr;
567 p->nop_cmds[i]->cmd_cmd = swab16(CMD_NOP);
568 p->nop_cmds[i]->cmd_status = 0;
569 p->nop_cmds[i]->cmd_link = make16((p->nop_cmds[i]));
570 ptr = (char *) ptr + sizeof(struct nop_cmd_struct);
571 }
572 #endif
573
574 ptr = alloc_rfa(dev,(void *)ptr); /* init receive-frame-area */
575
576 /*
577 * alloc xmit-buffs / init xmit_cmds
578 */
579 for(i=0;i<NUM_XMIT_BUFFS;i++)
580 {
581 p->xmit_cmds[i] = (struct transmit_cmd_struct *)ptr; /*transmit cmd/buff 0*/
582 ptr = (char *) ptr + sizeof(struct transmit_cmd_struct);
583 p->xmit_cbuffs[i] = (char *)ptr; /* char-buffs */
584 ptr = (char *) ptr + XMIT_BUFF_SIZE;
585 p->xmit_buffs[i] = (struct tbd_struct *)ptr; /* TBD */
586 ptr = (char *) ptr + sizeof(struct tbd_struct);
587 if((void *)ptr > (void *)dev->mem_end)
588 {
589 printk("%s: not enough shared-mem for your configuration!\n",dev->name);
590 return 1;
591 }
592 memset((char *)(p->xmit_cmds[i]) ,0, sizeof(struct transmit_cmd_struct));
593 memset((char *)(p->xmit_buffs[i]),0, sizeof(struct tbd_struct));
594 p->xmit_cmds[i]->cmd_link = make16(p->nop_cmds[(i+1)%NUM_XMIT_BUFFS]);
595 p->xmit_cmds[i]->cmd_status = swab16(STAT_COMPL);
596 p->xmit_cmds[i]->cmd_cmd = swab16(CMD_XMIT | CMD_INT);
597 p->xmit_cmds[i]->tbd_offset = make16((p->xmit_buffs[i]));
598 p->xmit_buffs[i]->next = 0xffff;
599 p->xmit_buffs[i]->buffer = make24((p->xmit_cbuffs[i]));
600 }
601
602 p->xmit_count = 0;
603 p->xmit_last = 0;
604 #ifndef NO_NOPCOMMANDS
605 p->nop_point = 0;
606 #endif
607
608 /*
609 * 'start transmitter'
610 */
611 #ifndef NO_NOPCOMMANDS
612 p->scb->cbl_offset = make16(p->nop_cmds[0]);
613 p->scb->cmd_cuc = CUC_START;
614 sun3_attn586();
615 WAIT_4_SCB_CMD();
616 #else
617 p->xmit_cmds[0]->cmd_link = make16(p->xmit_cmds[0]);
618 p->xmit_cmds[0]->cmd_cmd = swab16(CMD_XMIT | CMD_SUSPEND | CMD_INT);
619 #endif
620
621 /*
622 * ack. interrupts
623 */
624 p->scb->cmd_cuc = p->scb->cus & STAT_MASK;
625 sun3_attn586();
626 DELAY_16();
627
628 sun3_enaint();
629 sun3_active();
630
631 return 0;
632 }
633
634 /******************************************************
635 * This is a helper routine for sun3_82586_rnr_int() and init586().
636 * It sets up the Receive Frame Area (RFA).
637 */
638
alloc_rfa(struct net_device * dev,void * ptr)639 static void *alloc_rfa(struct net_device *dev,void *ptr)
640 {
641 volatile struct rfd_struct *rfd = (struct rfd_struct *)ptr;
642 volatile struct rbd_struct *rbd;
643 int i;
644 struct priv *p = netdev_priv(dev);
645
646 memset((char *) rfd,0,sizeof(struct rfd_struct)*(p->num_recv_buffs+rfdadd));
647 p->rfd_first = rfd;
648
649 for(i = 0; i < (p->num_recv_buffs+rfdadd); i++) {
650 rfd[i].next = make16(rfd + (i+1) % (p->num_recv_buffs+rfdadd) );
651 rfd[i].rbd_offset = 0xffff;
652 }
653 rfd[p->num_recv_buffs-1+rfdadd].last = RFD_SUSP; /* RU suspend */
654
655 ptr = (void *) (rfd + (p->num_recv_buffs + rfdadd) );
656
657 rbd = (struct rbd_struct *) ptr;
658 ptr = (void *) (rbd + p->num_recv_buffs);
659
660 /* clr descriptors */
661 memset((char *) rbd,0,sizeof(struct rbd_struct)*(p->num_recv_buffs));
662
663 for(i=0;i<p->num_recv_buffs;i++)
664 {
665 rbd[i].next = make16((rbd + (i+1) % p->num_recv_buffs));
666 rbd[i].size = swab16(RECV_BUFF_SIZE);
667 rbd[i].buffer = make24(ptr);
668 ptr = (char *) ptr + RECV_BUFF_SIZE;
669 }
670
671 p->rfd_top = p->rfd_first;
672 p->rfd_last = p->rfd_first + (p->num_recv_buffs - 1 + rfdadd);
673
674 p->scb->rfa_offset = make16(p->rfd_first);
675 p->rfd_first->rbd_offset = make16(rbd);
676
677 return ptr;
678 }
679
680
681 /**************************************************
682 * Interrupt Handler ...
683 */
684
sun3_82586_interrupt(int irq,void * dev_id)685 static irqreturn_t sun3_82586_interrupt(int irq,void *dev_id)
686 {
687 struct net_device *dev = dev_id;
688 unsigned short stat;
689 int cnt=0;
690 struct priv *p;
691
692 if (!dev) {
693 printk ("sun3_82586-interrupt: irq %d for unknown device.\n",irq);
694 return IRQ_NONE;
695 }
696 p = netdev_priv(dev);
697
698 if(debuglevel > 1)
699 printk("I");
700
701 WAIT_4_SCB_CMD(); /* wait for last command */
702
703 while((stat=p->scb->cus & STAT_MASK))
704 {
705 p->scb->cmd_cuc = stat;
706 sun3_attn586();
707
708 if(stat & STAT_FR) /* received a frame */
709 sun3_82586_rcv_int(dev);
710
711 if(stat & STAT_RNR) /* RU went 'not ready' */
712 {
713 printk("(R)");
714 if(p->scb->rus & RU_SUSPEND) /* special case: RU_SUSPEND */
715 {
716 WAIT_4_SCB_CMD();
717 p->scb->cmd_ruc = RUC_RESUME;
718 sun3_attn586();
719 WAIT_4_SCB_CMD_RUC();
720 }
721 else
722 {
723 printk("%s: Receiver-Unit went 'NOT READY': %04x/%02x.\n",dev->name,(int) stat,(int) p->scb->rus);
724 sun3_82586_rnr_int(dev);
725 }
726 }
727
728 if(stat & STAT_CX) /* command with I-bit set complete */
729 sun3_82586_xmt_int(dev);
730
731 #ifndef NO_NOPCOMMANDS
732 if(stat & STAT_CNA) /* CU went 'not ready' */
733 {
734 if(netif_running(dev))
735 printk("%s: oops! CU has left active state. stat: %04x/%02x.\n",dev->name,(int) stat,(int) p->scb->cus);
736 }
737 #endif
738
739 if(debuglevel > 1)
740 printk("%d",cnt++);
741
742 WAIT_4_SCB_CMD(); /* wait for ack. (sun3_82586_xmt_int can be faster than ack!!) */
743 if(p->scb->cmd_cuc) /* timed out? */
744 {
745 printk("%s: Acknowledge timed out.\n",dev->name);
746 sun3_disint();
747 break;
748 }
749 }
750
751 if(debuglevel > 1)
752 printk("i");
753 return IRQ_HANDLED;
754 }
755
756 /*******************************************************
757 * receive-interrupt
758 */
759
sun3_82586_rcv_int(struct net_device * dev)760 static void sun3_82586_rcv_int(struct net_device *dev)
761 {
762 int status,cnt=0;
763 unsigned short totlen;
764 struct sk_buff *skb;
765 struct rbd_struct *rbd;
766 struct priv *p = netdev_priv(dev);
767
768 if(debuglevel > 0)
769 printk("R");
770
771 for(;(status = p->rfd_top->stat_high) & RFD_COMPL;)
772 {
773 rbd = (struct rbd_struct *) make32(p->rfd_top->rbd_offset);
774
775 if(status & RFD_OK) /* frame received without error? */
776 {
777 if( (totlen = swab16(rbd->status)) & RBD_LAST) /* the first and the last buffer? */
778 {
779 totlen &= RBD_MASK; /* length of this frame */
780 rbd->status = 0;
781 skb = netdev_alloc_skb(dev, totlen + 2);
782 if(skb != NULL)
783 {
784 skb_reserve(skb,2);
785 skb_put(skb,totlen);
786 skb_copy_to_linear_data(skb,(char *) p->base+swab32((unsigned long) rbd->buffer),totlen);
787 skb->protocol=eth_type_trans(skb,dev);
788 netif_rx(skb);
789 dev->stats.rx_packets++;
790 }
791 else
792 dev->stats.rx_dropped++;
793 }
794 else
795 {
796 int rstat;
797 /* free all RBD's until RBD_LAST is set */
798 totlen = 0;
799 while(!((rstat=swab16(rbd->status)) & RBD_LAST))
800 {
801 totlen += rstat & RBD_MASK;
802 if(!rstat)
803 {
804 printk("%s: Whoops .. no end mark in RBD list\n",dev->name);
805 break;
806 }
807 rbd->status = 0;
808 rbd = (struct rbd_struct *) make32(rbd->next);
809 }
810 totlen += rstat & RBD_MASK;
811 rbd->status = 0;
812 printk("%s: received oversized frame! length: %d\n",dev->name,totlen);
813 dev->stats.rx_dropped++;
814 }
815 }
816 else /* frame !(ok), only with 'save-bad-frames' */
817 {
818 printk("%s: oops! rfd-error-status: %04x\n",dev->name,status);
819 dev->stats.rx_errors++;
820 }
821 p->rfd_top->stat_high = 0;
822 p->rfd_top->last = RFD_SUSP; /* maybe exchange by RFD_LAST */
823 p->rfd_top->rbd_offset = 0xffff;
824 p->rfd_last->last = 0; /* delete RFD_SUSP */
825 p->rfd_last = p->rfd_top;
826 p->rfd_top = (struct rfd_struct *) make32(p->rfd_top->next); /* step to next RFD */
827 p->scb->rfa_offset = make16(p->rfd_top);
828
829 if(debuglevel > 0)
830 printk("%d",cnt++);
831 }
832
833 if(automatic_resume)
834 {
835 WAIT_4_SCB_CMD();
836 p->scb->cmd_ruc = RUC_RESUME;
837 sun3_attn586();
838 WAIT_4_SCB_CMD_RUC();
839 }
840
841 #ifdef WAIT_4_BUSY
842 {
843 int i;
844 for(i=0;i<1024;i++)
845 {
846 if(p->rfd_top->status)
847 break;
848 DELAY_16();
849 if(i == 1023)
850 printk("%s: RU hasn't fetched next RFD (not busy/complete)\n",dev->name);
851 }
852 }
853 #endif
854
855 #if 0
856 if(!at_least_one)
857 {
858 int i;
859 volatile struct rfd_struct *rfds=p->rfd_top;
860 volatile struct rbd_struct *rbds;
861 printk("%s: received a FC intr. without having a frame: %04x %d\n",dev->name,status,old_at_least);
862 for(i=0;i< (p->num_recv_buffs+4);i++)
863 {
864 rbds = (struct rbd_struct *) make32(rfds->rbd_offset);
865 printk("%04x:%04x ",rfds->status,rbds->status);
866 rfds = (struct rfd_struct *) make32(rfds->next);
867 }
868 printk("\nerrs: %04x %04x stat: %04x\n",(int)p->scb->rsc_errs,(int)p->scb->ovrn_errs,(int)p->scb->status);
869 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);
870 }
871 old_at_least = at_least_one;
872 #endif
873
874 if(debuglevel > 0)
875 printk("r");
876 }
877
878 /**********************************************************
879 * handle 'Receiver went not ready'.
880 */
881
sun3_82586_rnr_int(struct net_device * dev)882 static void sun3_82586_rnr_int(struct net_device *dev)
883 {
884 struct priv *p = netdev_priv(dev);
885
886 dev->stats.rx_errors++;
887
888 WAIT_4_SCB_CMD(); /* wait for the last cmd, WAIT_4_FULLSTAT?? */
889 p->scb->cmd_ruc = RUC_ABORT; /* usually the RU is in the 'no resource'-state .. abort it now. */
890 sun3_attn586();
891 WAIT_4_SCB_CMD_RUC(); /* wait for accept cmd. */
892
893 alloc_rfa(dev,(char *)p->rfd_first);
894 /* maybe add a check here, before restarting the RU */
895 startrecv586(dev); /* restart RU */
896
897 printk("%s: Receive-Unit restarted. Status: %04x\n",dev->name,p->scb->rus);
898
899 }
900
901 /**********************************************************
902 * handle xmit - interrupt
903 */
904
sun3_82586_xmt_int(struct net_device * dev)905 static void sun3_82586_xmt_int(struct net_device *dev)
906 {
907 int status;
908 struct priv *p = netdev_priv(dev);
909
910 if(debuglevel > 0)
911 printk("X");
912
913 status = swab16(p->xmit_cmds[p->xmit_last]->cmd_status);
914 if(!(status & STAT_COMPL))
915 printk("%s: strange .. xmit-int without a 'COMPLETE'\n",dev->name);
916
917 if(status & STAT_OK)
918 {
919 dev->stats.tx_packets++;
920 dev->stats.collisions += (status & TCMD_MAXCOLLMASK);
921 }
922 else
923 {
924 dev->stats.tx_errors++;
925 if(status & TCMD_LATECOLL) {
926 printk("%s: late collision detected.\n",dev->name);
927 dev->stats.collisions++;
928 }
929 else if(status & TCMD_NOCARRIER) {
930 dev->stats.tx_carrier_errors++;
931 printk("%s: no carrier detected.\n",dev->name);
932 }
933 else if(status & TCMD_LOSTCTS)
934 printk("%s: loss of CTS detected.\n",dev->name);
935 else if(status & TCMD_UNDERRUN) {
936 dev->stats.tx_fifo_errors++;
937 printk("%s: DMA underrun detected.\n",dev->name);
938 }
939 else if(status & TCMD_MAXCOLL) {
940 printk("%s: Max. collisions exceeded.\n",dev->name);
941 dev->stats.collisions += 16;
942 }
943 }
944
945 #if (NUM_XMIT_BUFFS > 1)
946 if( (++p->xmit_last) == NUM_XMIT_BUFFS)
947 p->xmit_last = 0;
948 #endif
949 netif_wake_queue(dev);
950 }
951
952 /***********************************************************
953 * (re)start the receiver
954 */
955
startrecv586(struct net_device * dev)956 static void startrecv586(struct net_device *dev)
957 {
958 struct priv *p = netdev_priv(dev);
959
960 WAIT_4_SCB_CMD();
961 WAIT_4_SCB_CMD_RUC();
962 p->scb->rfa_offset = make16(p->rfd_first);
963 p->scb->cmd_ruc = RUC_START;
964 sun3_attn586(); /* start cmd. */
965 WAIT_4_SCB_CMD_RUC(); /* wait for accept cmd. (no timeout!!) */
966 }
967
sun3_82586_timeout(struct net_device * dev)968 static void sun3_82586_timeout(struct net_device *dev)
969 {
970 struct priv *p = netdev_priv(dev);
971 #ifndef NO_NOPCOMMANDS
972 if(p->scb->cus & CU_ACTIVE) /* COMMAND-UNIT active? */
973 {
974 netif_wake_queue(dev);
975 #ifdef DEBUG
976 printk("%s: strange ... timeout with CU active?!?\n",dev->name);
977 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);
978 #endif
979 p->scb->cmd_cuc = CUC_ABORT;
980 sun3_attn586();
981 WAIT_4_SCB_CMD();
982 p->scb->cbl_offset = make16(p->nop_cmds[p->nop_point]);
983 p->scb->cmd_cuc = CUC_START;
984 sun3_attn586();
985 WAIT_4_SCB_CMD();
986 dev->trans_start = jiffies; /* prevent tx timeout */
987 return 0;
988 }
989 #endif
990 {
991 #ifdef DEBUG
992 printk("%s: xmitter timed out, try to restart! stat: %02x\n",dev->name,p->scb->cus);
993 printk("%s: command-stats: %04x %04x\n",dev->name,swab16(p->xmit_cmds[0]->cmd_status),swab16(p->xmit_cmds[1]->cmd_status));
994 printk("%s: check, whether you set the right interrupt number!\n",dev->name);
995 #endif
996 sun3_82586_close(dev);
997 sun3_82586_open(dev);
998 }
999 dev->trans_start = jiffies; /* prevent tx timeout */
1000 }
1001
1002 /******************************************************
1003 * send frame
1004 */
1005
sun3_82586_send_packet(struct sk_buff * skb,struct net_device * dev)1006 static int sun3_82586_send_packet(struct sk_buff *skb, struct net_device *dev)
1007 {
1008 int len,i;
1009 #ifndef NO_NOPCOMMANDS
1010 int next_nop;
1011 #endif
1012 struct priv *p = netdev_priv(dev);
1013
1014 if(skb->len > XMIT_BUFF_SIZE)
1015 {
1016 printk("%s: Sorry, max. framelength is %d bytes. The length of your frame is %d bytes.\n",dev->name,XMIT_BUFF_SIZE,skb->len);
1017 return NETDEV_TX_OK;
1018 }
1019
1020 netif_stop_queue(dev);
1021
1022 #if(NUM_XMIT_BUFFS > 1)
1023 if(test_and_set_bit(0,(void *) &p->lock)) {
1024 printk("%s: Queue was locked\n",dev->name);
1025 return NETDEV_TX_BUSY;
1026 }
1027 else
1028 #endif
1029 {
1030 len = skb->len;
1031 if (len < ETH_ZLEN) {
1032 memset((void *)p->xmit_cbuffs[p->xmit_count], 0,
1033 ETH_ZLEN);
1034 len = ETH_ZLEN;
1035 }
1036 skb_copy_from_linear_data(skb, (void *)p->xmit_cbuffs[p->xmit_count], skb->len);
1037
1038 #if (NUM_XMIT_BUFFS == 1)
1039 # ifdef NO_NOPCOMMANDS
1040
1041 #ifdef DEBUG
1042 if(p->scb->cus & CU_ACTIVE)
1043 {
1044 printk("%s: Hmmm .. CU is still running and we wanna send a new packet.\n",dev->name);
1045 printk("%s: stat: %04x %04x\n",dev->name,p->scb->cus,swab16(p->xmit_cmds[0]->cmd_status));
1046 }
1047 #endif
1048
1049 p->xmit_buffs[0]->size = swab16(TBD_LAST | len);
1050 for(i=0;i<16;i++)
1051 {
1052 p->xmit_cmds[0]->cmd_status = 0;
1053 WAIT_4_SCB_CMD();
1054 if( (p->scb->cus & CU_STATUS) == CU_SUSPEND)
1055 p->scb->cmd_cuc = CUC_RESUME;
1056 else
1057 {
1058 p->scb->cbl_offset = make16(p->xmit_cmds[0]);
1059 p->scb->cmd_cuc = CUC_START;
1060 }
1061
1062 sun3_attn586();
1063 if(!i)
1064 dev_kfree_skb(skb);
1065 WAIT_4_SCB_CMD();
1066 if( (p->scb->cus & CU_ACTIVE)) /* test it, because CU sometimes doesn't start immediately */
1067 break;
1068 if(p->xmit_cmds[0]->cmd_status)
1069 break;
1070 if(i==15)
1071 printk("%s: Can't start transmit-command.\n",dev->name);
1072 }
1073 # else
1074 next_nop = (p->nop_point + 1) & 0x1;
1075 p->xmit_buffs[0]->size = swab16(TBD_LAST | len);
1076
1077 p->xmit_cmds[0]->cmd_link = p->nop_cmds[next_nop]->cmd_link
1078 = make16((p->nop_cmds[next_nop]));
1079 p->xmit_cmds[0]->cmd_status = p->nop_cmds[next_nop]->cmd_status = 0;
1080
1081 p->nop_cmds[p->nop_point]->cmd_link = make16((p->xmit_cmds[0]));
1082 p->nop_point = next_nop;
1083 dev_kfree_skb(skb);
1084 # endif
1085 #else
1086 p->xmit_buffs[p->xmit_count]->size = swab16(TBD_LAST | len);
1087 if( (next_nop = p->xmit_count + 1) == NUM_XMIT_BUFFS )
1088 next_nop = 0;
1089
1090 p->xmit_cmds[p->xmit_count]->cmd_status = 0;
1091 /* linkpointer of xmit-command already points to next nop cmd */
1092 p->nop_cmds[next_nop]->cmd_link = make16((p->nop_cmds[next_nop]));
1093 p->nop_cmds[next_nop]->cmd_status = 0;
1094
1095 p->nop_cmds[p->xmit_count]->cmd_link = make16((p->xmit_cmds[p->xmit_count]));
1096 p->xmit_count = next_nop;
1097
1098 {
1099 unsigned long flags;
1100 local_irq_save(flags);
1101 if(p->xmit_count != p->xmit_last)
1102 netif_wake_queue(dev);
1103 p->lock = 0;
1104 local_irq_restore(flags);
1105 }
1106 dev_kfree_skb(skb);
1107 #endif
1108 }
1109 return NETDEV_TX_OK;
1110 }
1111
1112 /*******************************************
1113 * Someone wanna have the statistics
1114 */
1115
sun3_82586_get_stats(struct net_device * dev)1116 static struct net_device_stats *sun3_82586_get_stats(struct net_device *dev)
1117 {
1118 struct priv *p = netdev_priv(dev);
1119 unsigned short crc,aln,rsc,ovrn;
1120
1121 crc = swab16(p->scb->crc_errs); /* get error-statistic from the ni82586 */
1122 p->scb->crc_errs = 0;
1123 aln = swab16(p->scb->aln_errs);
1124 p->scb->aln_errs = 0;
1125 rsc = swab16(p->scb->rsc_errs);
1126 p->scb->rsc_errs = 0;
1127 ovrn = swab16(p->scb->ovrn_errs);
1128 p->scb->ovrn_errs = 0;
1129
1130 dev->stats.rx_crc_errors += crc;
1131 dev->stats.rx_fifo_errors += ovrn;
1132 dev->stats.rx_frame_errors += aln;
1133 dev->stats.rx_dropped += rsc;
1134
1135 return &dev->stats;
1136 }
1137
1138 /********************************************************
1139 * Set MC list ..
1140 */
1141
set_multicast_list(struct net_device * dev)1142 static void set_multicast_list(struct net_device *dev)
1143 {
1144 netif_stop_queue(dev);
1145 sun3_disint();
1146 alloc586(dev);
1147 init586(dev);
1148 startrecv586(dev);
1149 sun3_enaint();
1150 netif_wake_queue(dev);
1151 }
1152
1153 #if 0
1154 /*
1155 * DUMP .. we expect a not running CMD unit and enough space
1156 */
1157 void sun3_82586_dump(struct net_device *dev,void *ptr)
1158 {
1159 struct priv *p = netdev_priv(dev);
1160 struct dump_cmd_struct *dump_cmd = (struct dump_cmd_struct *) ptr;
1161 int i;
1162
1163 p->scb->cmd_cuc = CUC_ABORT;
1164 sun3_attn586();
1165 WAIT_4_SCB_CMD();
1166 WAIT_4_SCB_CMD_RUC();
1167
1168 dump_cmd->cmd_status = 0;
1169 dump_cmd->cmd_cmd = CMD_DUMP | CMD_LAST;
1170 dump_cmd->dump_offset = make16((dump_cmd + 1));
1171 dump_cmd->cmd_link = 0xffff;
1172
1173 p->scb->cbl_offset = make16(dump_cmd);
1174 p->scb->cmd_cuc = CUC_START;
1175 sun3_attn586();
1176 WAIT_4_STAT_COMPL(dump_cmd);
1177
1178 if( (dump_cmd->cmd_status & (STAT_COMPL|STAT_OK)) != (STAT_COMPL|STAT_OK) )
1179 printk("%s: Can't get dump information.\n",dev->name);
1180
1181 for(i=0;i<170;i++) {
1182 printk("%02x ",(int) ((unsigned char *) (dump_cmd + 1))[i]);
1183 if(i % 24 == 23)
1184 printk("\n");
1185 }
1186 printk("\n");
1187 }
1188 #endif
1189