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Now it works.
[cbs-scheduler.git] / drivers / net / sun3_82586.c
blobe0d84772771ca6bf61a32f9019104b500680114b
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/module.h>
32 #include <linux/kernel.h>
33 #include <linux/string.h>
34 #include <linux/errno.h>
35 #include <linux/ioport.h>
36 #include <linux/slab.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_SIZE
59
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 works
73 * --------------- in a different (more stable?) mode. Only in this mode it's
74 * possible to configure the driver with 'NO_NOPCOMMANDS'
75
76 sizeof(scp)=12; sizeof(scb)=16; sizeof(iscp)=8;
77 sizeof(scp)+sizeof(iscp)+sizeof(scb) = 36 = INIT
78 sizeof(rfd) = 24; sizeof(rbd) = 12;
79 sizeof(tbd) = 8; sizeof(transmit_cmd) = 16;
80 sizeof(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
122 static int sun3_82586_probe1(struct net_device *dev,int ioaddr);
123 static irqreturn_t sun3_82586_interrupt(int irq,void *dev_id);
124 static int sun3_82586_open(struct net_device *dev);
125 static int sun3_82586_close(struct net_device *dev);
126 static int sun3_82586_send_packet(struct sk_buff *,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);
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 struct net_device_stats stats;
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 #else
160 volatile struct nop_cmd_struct *nop_cmds[NUM_XMIT_BUFFS];
161 #endif
162 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 device
169 */
170 static 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 device
183 */
184 static 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 */
209 static 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 */
248 static 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
281 struct net_device * __init sun3_82586_probe(int unit)
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 ERR_PTR(-ENODEV);
297 }
298
299 if (found)
300 return ERR_PTR(-ENODEV);
301
302 ioaddr = (unsigned long)ioremap(IE_OBIO, SUN3_82586_TOTAL_SIZE);
303 if (!ioaddr)
304 return ERR_PTR(-ENOMEM);
305 found = 1;
306
307 dev = alloc_etherdev(sizeof(struct priv));
308 if (!dev)
309 goto out;
310 if (unit >= 0) {
311 sprintf(dev->name, "eth%d", unit);
312 netdev_boot_setup_check(dev);
313 }
314
315 dev->irq = IE_IRQ;
316 dev->base_addr = ioaddr;
317 err = sun3_82586_probe1(dev, ioaddr);
318 if (err)
319 goto out1;
320 err = register_netdev(dev);
321 if (err)
322 goto out2;
323 return dev;
324
325 out2:
326 release_region(ioaddr, SUN3_82586_TOTAL_SIZE);
327 out1:
328 free_netdev(dev);
329 out:
330 iounmap((void __iomem *)ioaddr);
331 return ERR_PTR(err);
332 }
333
334 static int __init sun3_82586_probe1(struct net_device *dev,int ioaddr)
335 {
336 int i, size, retval;
337
338 if (!request_region(ioaddr, SUN3_82586_TOTAL_SIZE, DRV_NAME))
339 return -EBUSY;
340
341 /* copy in the ethernet address from the prom */
342 for(i = 0; i < 6 ; i++)
343 dev->dev_addr[i] = idprom->id_ethaddr[i];
344
345 printk("%s: SUN3 Intel 82586 found at %lx, ",dev->name,dev->base_addr);
346
347 /*
348 * check (or search) IO-Memory, 32K
349 */
350 size = 0x8000;
351
352 dev->mem_start = (unsigned long)dvma_malloc_align(0x8000, 0x1000);
353 dev->mem_end = dev->mem_start + size;
354
355 if(size != 0x2000 && size != 0x4000 && size != 0x8000) {
356 printk("\n%s: Illegal memory size %d. Allowed is 0x2000 or 0x4000 or 0x8000 bytes.\n",dev->name,size);
357 retval = -ENODEV;
358 goto out;
359 }
360 if(!check586(dev,(char *) dev->mem_start,size)) {
361 printk("?memcheck, Can't find memory at 0x%lx with size %d!\n",dev->mem_start,size);
362 retval = -ENODEV;
363 goto out;
364 }
365
366 ((struct priv *)netdev_priv(dev))->memtop =
367 (char *)dvma_btov(dev->mem_start);
368 ((struct priv *)netdev_priv(dev))->base = (unsigned long) dvma_btov(0);
369 alloc586(dev);
370
371 /* set number of receive-buffs according to memsize */
372 if(size == 0x2000)
373 ((struct priv *)netdev_priv(dev))->num_recv_buffs =
374 NUM_RECV_BUFFS_8;
375 else if(size == 0x4000)
376 ((struct priv *)netdev_priv(dev))->num_recv_buffs =
377 NUM_RECV_BUFFS_16;
378 else
379 ((struct priv *)netdev_priv(dev))->num_recv_buffs =
380 NUM_RECV_BUFFS_32;
381
382 printk("Memaddr: 0x%lx, Memsize: %d, IRQ %d\n",dev->mem_start,size, dev->irq);
383
384 dev->open = sun3_82586_open;
385 dev->stop = sun3_82586_close;
386 dev->get_stats = sun3_82586_get_stats;
387 dev->tx_timeout = sun3_82586_timeout;
388 dev->watchdog_timeo = HZ/20;
389 dev->hard_start_xmit = sun3_82586_send_packet;
390 dev->set_multicast_list = set_multicast_list;
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
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 dev_mc_list *dmi=dev->mc_list;
410 int num_addrs=dev->mc_count;
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,(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 for(i=0;i<num_addrs;i++,dmi=dmi->next)
533 memcpy((char *) mc_cmd->mc_list[i], dmi->dmi_addr,6);
534
535 p->scb->cbl_offset = make16(mc_cmd);
536 p->scb->cmd_cuc = CUC_START;
537 sun3_attn586();
538
539 WAIT_4_STAT_COMPL(mc_cmd);
540
541 if( (swab16(mc_cmd->cmd_status) & (STAT_COMPL|STAT_OK)) != (STAT_COMPL|STAT_OK) )
542 printk("%s: Can't apply multicast-address-list.\n",dev->name);
543 }
544
545 /*
546 * alloc nop/xmit-cmds
547 */
548 #if (NUM_XMIT_BUFFS == 1)
549 for(i=0;i<2;i++)
550 {
551 p->nop_cmds[i] = (struct nop_cmd_struct *)ptr;
552 p->nop_cmds[i]->cmd_cmd = swab16(CMD_NOP);
553 p->nop_cmds[i]->cmd_status = 0;
554 p->nop_cmds[i]->cmd_link = make16((p->nop_cmds[i]));
555 ptr = (char *) ptr + sizeof(struct nop_cmd_struct);
556 }
557 #else
558 for(i=0;i<NUM_XMIT_BUFFS;i++)
559 {
560 p->nop_cmds[i] = (struct nop_cmd_struct *)ptr;
561 p->nop_cmds[i]->cmd_cmd = swab16(CMD_NOP);
562 p->nop_cmds[i]->cmd_status = 0;
563 p->nop_cmds[i]->cmd_link = make16((p->nop_cmds[i]));
564 ptr = (char *) ptr + sizeof(struct nop_cmd_struct);
565 }
566 #endif
567
568 ptr = alloc_rfa(dev,(void *)ptr); /* init receive-frame-area */
569
570 /*
571 * alloc xmit-buffs / init xmit_cmds
572 */
573 for(i=0;i<NUM_XMIT_BUFFS;i++)
574 {
575 p->xmit_cmds[i] = (struct transmit_cmd_struct *)ptr; /*transmit cmd/buff 0*/
576 ptr = (char *) ptr + sizeof(struct transmit_cmd_struct);
577 p->xmit_cbuffs[i] = (char *)ptr; /* char-buffs */
578 ptr = (char *) ptr + XMIT_BUFF_SIZE;
579 p->xmit_buffs[i] = (struct tbd_struct *)ptr; /* TBD */
580 ptr = (char *) ptr + sizeof(struct tbd_struct);
581 if((void *)ptr > (void *)dev->mem_end)
582 {
583 printk("%s: not enough shared-mem for your configuration!\n",dev->name);
584 return 1;
585 }
586 memset((char *)(p->xmit_cmds[i]) ,0, sizeof(struct transmit_cmd_struct));
587 memset((char *)(p->xmit_buffs[i]),0, sizeof(struct tbd_struct));
588 p->xmit_cmds[i]->cmd_link = make16(p->nop_cmds[(i+1)%NUM_XMIT_BUFFS]);
589 p->xmit_cmds[i]->cmd_status = swab16(STAT_COMPL);
590 p->xmit_cmds[i]->cmd_cmd = swab16(CMD_XMIT | CMD_INT);
591 p->xmit_cmds[i]->tbd_offset = make16((p->xmit_buffs[i]));
592 p->xmit_buffs[i]->next = 0xffff;
593 p->xmit_buffs[i]->buffer = make24((p->xmit_cbuffs[i]));
594 }
595
596 p->xmit_count = 0;
597 p->xmit_last = 0;
598 #ifndef NO_NOPCOMMANDS
599 p->nop_point = 0;
600 #endif
601
602 /*
603 * 'start transmitter'
604 */
605 #ifndef NO_NOPCOMMANDS
606 p->scb->cbl_offset = make16(p->nop_cmds[0]);
607 p->scb->cmd_cuc = CUC_START;
608 sun3_attn586();
609 WAIT_4_SCB_CMD();
610 #else
611 p->xmit_cmds[0]->cmd_link = make16(p->xmit_cmds[0]);
612 p->xmit_cmds[0]->cmd_cmd = swab16(CMD_XMIT | CMD_SUSPEND | CMD_INT);
613 #endif
614
615 /*
616 * ack. interrupts
617 */
618 p->scb->cmd_cuc = p->scb->cus & STAT_MASK;
619 sun3_attn586();
620 DELAY_16();
621
622 sun3_enaint();
623 sun3_active();
624
625 return 0;
626 }
627
628 /******************************************************
629 * This is a helper routine for sun3_82586_rnr_int() and init586().
630 * It sets up the Receive Frame Area (RFA).
631 */
632
633 static void *alloc_rfa(struct net_device *dev,void *ptr)
634 {
635 volatile struct rfd_struct *rfd = (struct rfd_struct *)ptr;
636 volatile struct rbd_struct *rbd;
637 int i;
638 struct priv *p = netdev_priv(dev);
639
640 memset((char *) rfd,0,sizeof(struct rfd_struct)*(p->num_recv_buffs+rfdadd));
641 p->rfd_first = rfd;
642
643 for(i = 0; i < (p->num_recv_buffs+rfdadd); i++) {
644 rfd[i].next = make16(rfd + (i+1) % (p->num_recv_buffs+rfdadd) );
645 rfd[i].rbd_offset = 0xffff;
646 }
647 rfd[p->num_recv_buffs-1+rfdadd].last = RFD_SUSP; /* RU suspend */
648
649 ptr = (void *) (rfd + (p->num_recv_buffs + rfdadd) );
650
651 rbd = (struct rbd_struct *) ptr;
652 ptr = (void *) (rbd + p->num_recv_buffs);
653
654 /* clr descriptors */
655 memset((char *) rbd,0,sizeof(struct rbd_struct)*(p->num_recv_buffs));
656
657 for(i=0;i<p->num_recv_buffs;i++)
658 {
659 rbd[i].next = make16((rbd + (i+1) % p->num_recv_buffs));
660 rbd[i].size = swab16(RECV_BUFF_SIZE);
661 rbd[i].buffer = make24(ptr);
662 ptr = (char *) ptr + RECV_BUFF_SIZE;
663 }
664
665 p->rfd_top = p->rfd_first;
666 p->rfd_last = p->rfd_first + (p->num_recv_buffs - 1 + rfdadd);
667
668 p->scb->rfa_offset = make16(p->rfd_first);
669 p->rfd_first->rbd_offset = make16(rbd);
670
671 return ptr;
672 }
673
674
675 /**************************************************
676 * Interrupt Handler ...
677 */
678
679 static irqreturn_t sun3_82586_interrupt(int irq,void *dev_id)
680 {
681 struct net_device *dev = dev_id;
682 unsigned short stat;
683 int cnt=0;
684 struct priv *p;
685
686 if (!dev) {
687 printk ("sun3_82586-interrupt: irq %d for unknown device.\n",irq);
688 return IRQ_NONE;
689 }
690 p = netdev_priv(dev);
691
692 if(debuglevel > 1)
693 printk("I");
694
695 WAIT_4_SCB_CMD(); /* wait for last command */
696
697 while((stat=p->scb->cus & STAT_MASK))
698 {
699 p->scb->cmd_cuc = stat;
700 sun3_attn586();
701
702 if(stat & STAT_FR) /* received a frame */
703 sun3_82586_rcv_int(dev);
704
705 if(stat & STAT_RNR) /* RU went 'not ready' */
706 {
707 printk("(R)");
708 if(p->scb->rus & RU_SUSPEND) /* special case: RU_SUSPEND */
709 {
710 WAIT_4_SCB_CMD();
711 p->scb->cmd_ruc = RUC_RESUME;
712 sun3_attn586();
713 WAIT_4_SCB_CMD_RUC();
714 }
715 else
716 {
717 printk("%s: Receiver-Unit went 'NOT READY': %04x/%02x.\n",dev->name,(int) stat,(int) p->scb->rus);
718 sun3_82586_rnr_int(dev);
719 }
720 }
721
722 if(stat & STAT_CX) /* command with I-bit set complete */
723 sun3_82586_xmt_int(dev);
724
725 #ifndef NO_NOPCOMMANDS
726 if(stat & STAT_CNA) /* CU went 'not ready' */
727 {
728 if(netif_running(dev))
729 printk("%s: oops! CU has left active state. stat: %04x/%02x.\n",dev->name,(int) stat,(int) p->scb->cus);
730 }
731 #endif
732
733 if(debuglevel > 1)
734 printk("%d",cnt++);
735
736 WAIT_4_SCB_CMD(); /* wait for ack. (sun3_82586_xmt_int can be faster than ack!!) */
737 if(p->scb->cmd_cuc) /* timed out? */
738 {
739 printk("%s: Acknowledge timed out.\n",dev->name);
740 sun3_disint();
741 break;
742 }
743 }
744
745 if(debuglevel > 1)
746 printk("i");
747 return IRQ_HANDLED;
748 }
749
750 /*******************************************************
751 * receive-interrupt
752 */
753
754 static void sun3_82586_rcv_int(struct net_device *dev)
755 {
756 int status,cnt=0;
757 unsigned short totlen;
758 struct sk_buff *skb;
759 struct rbd_struct *rbd;
760 struct priv *p = netdev_priv(dev);
761
762 if(debuglevel > 0)
763 printk("R");
764
765 for(;(status = p->rfd_top->stat_high) & RFD_COMPL;)
766 {
767 rbd = (struct rbd_struct *) make32(p->rfd_top->rbd_offset);
768
769 if(status & RFD_OK) /* frame received without error? */
770 {
771 if( (totlen = swab16(rbd->status)) & RBD_LAST) /* the first and the last buffer? */
772 {
773 totlen &= RBD_MASK; /* length of this frame */
774 rbd->status = 0;
775 skb = (struct sk_buff *) dev_alloc_skb(totlen+2);
776 if(skb != NULL)
777 {
778 skb_reserve(skb,2);
779 skb_put(skb,totlen);
780 skb_copy_to_linear_data(skb,(char *) p->base+swab32((unsigned long) rbd->buffer),totlen);
781 skb->protocol=eth_type_trans(skb,dev);
782 netif_rx(skb);
783 p->stats.rx_packets++;
784 }
785 else
786 p->stats.rx_dropped++;
787 }
788 else
789 {
790 int rstat;
791 /* free all RBD's until RBD_LAST is set */
792 totlen = 0;
793 while(!((rstat=swab16(rbd->status)) & RBD_LAST))
794 {
795 totlen += rstat & RBD_MASK;
796 if(!rstat)
797 {
798 printk("%s: Whoops .. no end mark in RBD list\n",dev->name);
799 break;
800 }
801 rbd->status = 0;
802 rbd = (struct rbd_struct *) make32(rbd->next);
803 }
804 totlen += rstat & RBD_MASK;
805 rbd->status = 0;
806 printk("%s: received oversized frame! length: %d\n",dev->name,totlen);
807 p->stats.rx_dropped++;
808 }
809 }
810 else /* frame !(ok), only with 'save-bad-frames' */
811 {
812 printk("%s: oops! rfd-error-status: %04x\n",dev->name,status);
813 p->stats.rx_errors++;
814 }
815 p->rfd_top->stat_high = 0;
816 p->rfd_top->last = RFD_SUSP; /* maybe exchange by RFD_LAST */
817 p->rfd_top->rbd_offset = 0xffff;
818 p->rfd_last->last = 0; /* delete RFD_SUSP */
819 p->rfd_last = p->rfd_top;
820 p->rfd_top = (struct rfd_struct *) make32(p->rfd_top->next); /* step to next RFD */
821 p->scb->rfa_offset = make16(p->rfd_top);
822
823 if(debuglevel > 0)
824 printk("%d",cnt++);
825 }
826
827 if(automatic_resume)
828 {
829 WAIT_4_SCB_CMD();
830 p->scb->cmd_ruc = RUC_RESUME;
831 sun3_attn586();
832 WAIT_4_SCB_CMD_RUC();
833 }
834
835 #ifdef WAIT_4_BUSY
836 {
837 int i;
838 for(i=0;i<1024;i++)
839 {
840 if(p->rfd_top->status)
841 break;
842 DELAY_16();
843 if(i == 1023)
844 printk("%s: RU hasn't fetched next RFD (not busy/complete)\n",dev->name);
845 }
846 }
847 #endif
848
849 #if 0
850 if(!at_least_one)
851 {
852 int i;
853 volatile struct rfd_struct *rfds=p->rfd_top;
854 volatile struct rbd_struct *rbds;
855 printk("%s: received a FC intr. without having a frame: %04x %d\n",dev->name,status,old_at_least);
856 for(i=0;i< (p->num_recv_buffs+4);i++)
857 {
858 rbds = (struct rbd_struct *) make32(rfds->rbd_offset);
859 printk("%04x:%04x ",rfds->status,rbds->status);
860 rfds = (struct rfd_struct *) make32(rfds->next);
861 }
862 printk("\nerrs: %04x %04x stat: %04x\n",(int)p->scb->rsc_errs,(int)p->scb->ovrn_errs,(int)p->scb->status);
863 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);
864 }
865 old_at_least = at_least_one;
866 #endif
867
868 if(debuglevel > 0)
869 printk("r");
870 }
871
872 /**********************************************************
873 * handle 'Receiver went not ready'.
874 */
875
876 static void sun3_82586_rnr_int(struct net_device *dev)
877 {
878 struct priv *p = netdev_priv(dev);
879
880 p->stats.rx_errors++;
881
882 WAIT_4_SCB_CMD(); /* wait for the last cmd, WAIT_4_FULLSTAT?? */
883 p->scb->cmd_ruc = RUC_ABORT; /* usually the RU is in the 'no resource'-state .. abort it now. */
884 sun3_attn586();
885 WAIT_4_SCB_CMD_RUC(); /* wait for accept cmd. */
886
887 alloc_rfa(dev,(char *)p->rfd_first);
888 /* maybe add a check here, before restarting the RU */
889 startrecv586(dev); /* restart RU */
890
891 printk("%s: Receive-Unit restarted. Status: %04x\n",dev->name,p->scb->rus);
892
893 }
894
895 /**********************************************************
896 * handle xmit - interrupt
897 */
898
899 static void sun3_82586_xmt_int(struct net_device *dev)
900 {
901 int status;
902 struct priv *p = netdev_priv(dev);
903
904 if(debuglevel > 0)
905 printk("X");
906
907 status = swab16(p->xmit_cmds[p->xmit_last]->cmd_status);
908 if(!(status & STAT_COMPL))
909 printk("%s: strange .. xmit-int without a 'COMPLETE'\n",dev->name);
910
911 if(status & STAT_OK)
912 {
913 p->stats.tx_packets++;
914 p->stats.collisions += (status & TCMD_MAXCOLLMASK);
915 }
916 else
917 {
918 p->stats.tx_errors++;
919 if(status & TCMD_LATECOLL) {
920 printk("%s: late collision detected.\n",dev->name);
921 p->stats.collisions++;
922 }
923 else if(status & TCMD_NOCARRIER) {
924 p->stats.tx_carrier_errors++;
925 printk("%s: no carrier detected.\n",dev->name);
926 }
927 else if(status & TCMD_LOSTCTS)
928 printk("%s: loss of CTS detected.\n",dev->name);
929 else if(status & TCMD_UNDERRUN) {
930 p->stats.tx_fifo_errors++;
931 printk("%s: DMA underrun detected.\n",dev->name);
932 }
933 else if(status & TCMD_MAXCOLL) {
934 printk("%s: Max. collisions exceeded.\n",dev->name);
935 p->stats.collisions += 16;
936 }
937 }
938
939 #if (NUM_XMIT_BUFFS > 1)
940 if( (++p->xmit_last) == NUM_XMIT_BUFFS)
941 p->xmit_last = 0;
942 #endif
943 netif_wake_queue(dev);
944 }
945
946 /***********************************************************
947 * (re)start the receiver
948 */
949
950 static void startrecv586(struct net_device *dev)
951 {
952 struct priv *p = netdev_priv(dev);
953
954 WAIT_4_SCB_CMD();
955 WAIT_4_SCB_CMD_RUC();
956 p->scb->rfa_offset = make16(p->rfd_first);
957 p->scb->cmd_ruc = RUC_START;
958 sun3_attn586(); /* start cmd. */
959 WAIT_4_SCB_CMD_RUC(); /* wait for accept cmd. (no timeout!!) */
960 }
961
962 static void sun3_82586_timeout(struct net_device *dev)
963 {
964 struct priv *p = netdev_priv(dev);
965 #ifndef NO_NOPCOMMANDS
966 if(p->scb->cus & CU_ACTIVE) /* COMMAND-UNIT active? */
967 {
968 netif_wake_queue(dev);
969 #ifdef DEBUG
970 printk("%s: strange ... timeout with CU active?!?\n",dev->name);
971 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);
972 #endif
973 p->scb->cmd_cuc = CUC_ABORT;
974 sun3_attn586();
975 WAIT_4_SCB_CMD();
976 p->scb->cbl_offset = make16(p->nop_cmds[p->nop_point]);
977 p->scb->cmd_cuc = CUC_START;
978 sun3_attn586();
979 WAIT_4_SCB_CMD();
980 dev->trans_start = jiffies;
981 return 0;
982 }
983 #endif
984 {
985 #ifdef DEBUG
986 printk("%s: xmitter timed out, try to restart! stat: %02x\n",dev->name,p->scb->cus);
987 printk("%s: command-stats: %04x %04x\n",dev->name,swab16(p->xmit_cmds[0]->cmd_status),swab16(p->xmit_cmds[1]->cmd_status));
988 printk("%s: check, whether you set the right interrupt number!\n",dev->name);
989 #endif
990 sun3_82586_close(dev);
991 sun3_82586_open(dev);
992 }
993 dev->trans_start = jiffies;
994 }
995
996 /******************************************************
997 * send frame
998 */
999
1000 static int sun3_82586_send_packet(struct sk_buff *skb, struct net_device *dev)
1001 {
1002 int len,i;
1003 #ifndef NO_NOPCOMMANDS
1004 int next_nop;
1005 #endif
1006 struct priv *p = netdev_priv(dev);
1007
1008 if(skb->len > XMIT_BUFF_SIZE)
1009 {
1010 printk("%s: Sorry, max. framelength is %d bytes. The length of your frame is %d bytes.\n",dev->name,XMIT_BUFF_SIZE,skb->len);
1011 return 0;
1012 }
1013
1014 netif_stop_queue(dev);
1015
1016 #if(NUM_XMIT_BUFFS > 1)
1017 if(test_and_set_bit(0,(void *) &p->lock)) {
1018 printk("%s: Queue was locked\n",dev->name);
1019 return 1;
1020 }
1021 else
1022 #endif
1023 {
1024 len = skb->len;
1025 if (len < ETH_ZLEN) {
1026 memset((void *)p->xmit_cbuffs[p->xmit_count], 0,
1027 ETH_ZLEN);
1028 len = ETH_ZLEN;
1029 }
1030 skb_copy_from_linear_data(skb, (void *)p->xmit_cbuffs[p->xmit_count], skb->len);
1031
1032 #if (NUM_XMIT_BUFFS == 1)
1033 # ifdef NO_NOPCOMMANDS
1034
1035 #ifdef DEBUG
1036 if(p->scb->cus & CU_ACTIVE)
1037 {
1038 printk("%s: Hmmm .. CU is still running and we wanna send a new packet.\n",dev->name);
1039 printk("%s: stat: %04x %04x\n",dev->name,p->scb->cus,swab16(p->xmit_cmds[0]->cmd_status));
1040 }
1041 #endif
1042
1043 p->xmit_buffs[0]->size = swab16(TBD_LAST | len);
1044 for(i=0;i<16;i++)
1045 {
1046 p->xmit_cmds[0]->cmd_status = 0;
1047 WAIT_4_SCB_CMD();
1048 if( (p->scb->cus & CU_STATUS) == CU_SUSPEND)
1049 p->scb->cmd_cuc = CUC_RESUME;
1050 else
1051 {
1052 p->scb->cbl_offset = make16(p->xmit_cmds[0]);
1053 p->scb->cmd_cuc = CUC_START;
1054 }
1055
1056 sun3_attn586();
1057 dev->trans_start = jiffies;
1058 if(!i)
1059 dev_kfree_skb(skb);
1060 WAIT_4_SCB_CMD();
1061 if( (p->scb->cus & CU_ACTIVE)) /* test it, because CU sometimes doesn't start immediately */
1062 break;
1063 if(p->xmit_cmds[0]->cmd_status)
1064 break;
1065 if(i==15)
1066 printk("%s: Can't start transmit-command.\n",dev->name);
1067 }
1068 # else
1069 next_nop = (p->nop_point + 1) & 0x1;
1070 p->xmit_buffs[0]->size = swab16(TBD_LAST | len);
1071
1072 p->xmit_cmds[0]->cmd_link = p->nop_cmds[next_nop]->cmd_link
1073 = make16((p->nop_cmds[next_nop]));
1074 p->xmit_cmds[0]->cmd_status = p->nop_cmds[next_nop]->cmd_status = 0;
1075
1076 p->nop_cmds[p->nop_point]->cmd_link = make16((p->xmit_cmds[0]));
1077 dev->trans_start = jiffies;
1078 p->nop_point = next_nop;
1079 dev_kfree_skb(skb);
1080 # endif
1081 #else
1082 p->xmit_buffs[p->xmit_count]->size = swab16(TBD_LAST | len);
1083 if( (next_nop = p->xmit_count + 1) == NUM_XMIT_BUFFS )
1084 next_nop = 0;
1085
1086 p->xmit_cmds[p->xmit_count]->cmd_status = 0;
1087 /* linkpointer of xmit-command already points to next nop cmd */
1088 p->nop_cmds[next_nop]->cmd_link = make16((p->nop_cmds[next_nop]));
1089 p->nop_cmds[next_nop]->cmd_status = 0;
1090
1091 p->nop_cmds[p->xmit_count]->cmd_link = make16((p->xmit_cmds[p->xmit_count]));
1092 dev->trans_start = jiffies;
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 0;
1107 }
1108
1109 /*******************************************
1110 * Someone wanna have the statistics
1111 */
1112
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 p->stats.rx_crc_errors += crc;
1128 p->stats.rx_fifo_errors += ovrn;
1129 p->stats.rx_frame_errors += aln;
1130 p->stats.rx_dropped += rsc;
1131
1132 return &p->stats;
1133 }
1134
1135 /********************************************************
1136 * Set MC list ..
1137 */
1138
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 #ifdef MODULE
1151 #error This code is not currently supported as a module
1152 static struct net_device *dev_sun3_82586;
1153
1154 int init_module(void)
1155 {
1156 dev_sun3_82586 = sun3_82586_probe(-1);
1157 if (IS_ERR(dev_sun3_82586))
1158 return PTR_ERR(dev_sun3_82586);
1159 return 0;
1160 }
1161
1162 void cleanup_module(void)
1163 {
1164 unsigned long ioaddr = dev_sun3_82586->base_addr;
1165 unregister_netdev(dev_sun3_82586);
1166 release_region(ioaddr, SUN3_82586_TOTAL_SIZE);
1167 iounmap((void *)ioaddr);
1168 free_netdev(dev_sun3_82586);
1169 }
1170 #endif /* MODULE */
1171
1172 #if 0
1173 /*
1174 * DUMP .. we expect a not running CMD unit and enough space
1175 */
1176 void sun3_82586_dump(struct net_device *dev,void *ptr)
1177 {
1178 struct priv *p = netdev_priv(dev);
1179 struct dump_cmd_struct *dump_cmd = (struct dump_cmd_struct *) ptr;
1180 int i;
1181
1182 p->scb->cmd_cuc = CUC_ABORT;
1183 sun3_attn586();
1184 WAIT_4_SCB_CMD();
1185 WAIT_4_SCB_CMD_RUC();
1186
1187 dump_cmd->cmd_status = 0;
1188 dump_cmd->cmd_cmd = CMD_DUMP | CMD_LAST;
1189 dump_cmd->dump_offset = make16((dump_cmd + 1));
1190 dump_cmd->cmd_link = 0xffff;
1191
1192 p->scb->cbl_offset = make16(dump_cmd);
1193 p->scb->cmd_cuc = CUC_START;
1194 sun3_attn586();
1195 WAIT_4_STAT_COMPL(dump_cmd);
1196
1197 if( (dump_cmd->cmd_status & (STAT_COMPL|STAT_OK)) != (STAT_COMPL|STAT_OK) )
1198 printk("%s: Can't get dump information.\n",dev->name);
1199
1200 for(i=0;i<170;i++) {
1201 printk("%02x ",(int) ((unsigned char *) (dump_cmd + 1))[i]);
1202 if(i % 24 == 23)
1203 printk("\n");
1204 }
1205 printk("\n");
1206 }
1207 #endif
1208
1209 MODULE_LICENSE("GPL");
A cbs scheduler for rt-kernel