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sched: clean up wakeup balancing, move wake_affine()
[wrt350n-kernel.git] / drivers / net / sun3_82586.c
blob9b2a7f7bb25863f1c2e68e14865bc3f1f4ff85c7
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 = /* (struct priv *) dev->priv*/ &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 = (struct priv *) dev->priv;
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 *) (dev->priv))->memtop = (char *)dvma_btov(dev->mem_start);
367 ((struct priv *) (dev->priv))->base = (unsigned long) dvma_btov(0);
368 alloc586(dev);
369
370 /* set number of receive-buffs according to memsize */
371 if(size == 0x2000)
372 ((struct priv *) dev->priv)->num_recv_buffs = NUM_RECV_BUFFS_8;
373 else if(size == 0x4000)
374 ((struct priv *) dev->priv)->num_recv_buffs = NUM_RECV_BUFFS_16;
375 else
376 ((struct priv *) dev->priv)->num_recv_buffs = NUM_RECV_BUFFS_32;
377
378 printk("Memaddr: 0x%lx, Memsize: %d, IRQ %d\n",dev->mem_start,size, dev->irq);
379
380 dev->open = sun3_82586_open;
381 dev->stop = sun3_82586_close;
382 dev->get_stats = sun3_82586_get_stats;
383 dev->tx_timeout = sun3_82586_timeout;
384 dev->watchdog_timeo = HZ/20;
385 dev->hard_start_xmit = sun3_82586_send_packet;
386 dev->set_multicast_list = set_multicast_list;
387
388 dev->if_port = 0;
389 return 0;
390 out:
391 release_region(ioaddr, SUN3_82586_TOTAL_SIZE);
392 return retval;
393 }
394
395
396 static int init586(struct net_device *dev)
397 {
398 void *ptr;
399 int i,result=0;
400 struct priv *p = (struct priv *) dev->priv;
401 volatile struct configure_cmd_struct *cfg_cmd;
402 volatile struct iasetup_cmd_struct *ias_cmd;
403 volatile struct tdr_cmd_struct *tdr_cmd;
404 volatile struct mcsetup_cmd_struct *mc_cmd;
405 struct dev_mc_list *dmi=dev->mc_list;
406 int num_addrs=dev->mc_count;
407
408 ptr = (void *) ((char *)p->scb + sizeof(struct scb_struct));
409
410 cfg_cmd = (struct configure_cmd_struct *)ptr; /* configure-command */
411 cfg_cmd->cmd_status = 0;
412 cfg_cmd->cmd_cmd = swab16(CMD_CONFIGURE | CMD_LAST);
413 cfg_cmd->cmd_link = 0xffff;
414
415 cfg_cmd->byte_cnt = 0x0a; /* number of cfg bytes */
416 cfg_cmd->fifo = fifo; /* fifo-limit (8=tx:32/rx:64) */
417 cfg_cmd->sav_bf = 0x40; /* hold or discard bad recv frames (bit 7) */
418 cfg_cmd->adr_len = 0x2e; /* addr_len |!src_insert |pre-len |loopback */
419 cfg_cmd->priority = 0x00;
420 cfg_cmd->ifs = 0x60;
421 cfg_cmd->time_low = 0x00;
422 cfg_cmd->time_high = 0xf2;
423 cfg_cmd->promisc = 0;
424 if(dev->flags & IFF_ALLMULTI) {
425 int len = ((char *) p->iscp - (char *) ptr - 8) / 6;
426 if(num_addrs > len) {
427 printk("%s: switching to promisc. mode\n",dev->name);
428 dev->flags|=IFF_PROMISC;
429 }
430 }
431 if(dev->flags&IFF_PROMISC)
432 {
433 cfg_cmd->promisc=1;
434 dev->flags|=IFF_PROMISC;
435 }
436 cfg_cmd->carr_coll = 0x00;
437
438 p->scb->cbl_offset = make16(cfg_cmd);
439 p->scb->cmd_ruc = 0;
440
441 p->scb->cmd_cuc = CUC_START; /* cmd.-unit start */
442 sun3_attn586();
443
444 WAIT_4_STAT_COMPL(cfg_cmd);
445
446 if((swab16(cfg_cmd->cmd_status) & (STAT_OK|STAT_COMPL)) != (STAT_COMPL|STAT_OK))
447 {
448 printk("%s: configure command failed: %x\n",dev->name,swab16(cfg_cmd->cmd_status));
449 return 1;
450 }
451
452 /*
453 * individual address setup
454 */
455
456 ias_cmd = (struct iasetup_cmd_struct *)ptr;
457
458 ias_cmd->cmd_status = 0;
459 ias_cmd->cmd_cmd = swab16(CMD_IASETUP | CMD_LAST);
460 ias_cmd->cmd_link = 0xffff;
461
462 memcpy((char *)&ias_cmd->iaddr,(char *) dev->dev_addr,ETH_ALEN);
463
464 p->scb->cbl_offset = make16(ias_cmd);
465
466 p->scb->cmd_cuc = CUC_START; /* cmd.-unit start */
467 sun3_attn586();
468
469 WAIT_4_STAT_COMPL(ias_cmd);
470
471 if((swab16(ias_cmd->cmd_status) & (STAT_OK|STAT_COMPL)) != (STAT_OK|STAT_COMPL)) {
472 printk("%s (82586): individual address setup command failed: %04x\n",dev->name,swab16(ias_cmd->cmd_status));
473 return 1;
474 }
475
476 /*
477 * TDR, wire check .. e.g. no resistor e.t.c
478 */
479
480 tdr_cmd = (struct tdr_cmd_struct *)ptr;
481
482 tdr_cmd->cmd_status = 0;
483 tdr_cmd->cmd_cmd = swab16(CMD_TDR | CMD_LAST);
484 tdr_cmd->cmd_link = 0xffff;
485 tdr_cmd->status = 0;
486
487 p->scb->cbl_offset = make16(tdr_cmd);
488 p->scb->cmd_cuc = CUC_START; /* cmd.-unit start */
489 sun3_attn586();
490
491 WAIT_4_STAT_COMPL(tdr_cmd);
492
493 if(!(swab16(tdr_cmd->cmd_status) & STAT_COMPL))
494 {
495 printk("%s: Problems while running the TDR.\n",dev->name);
496 }
497 else
498 {
499 DELAY_16(); /* wait for result */
500 result = swab16(tdr_cmd->status);
501
502 p->scb->cmd_cuc = p->scb->cus & STAT_MASK;
503 sun3_attn586(); /* ack the interrupts */
504
505 if(result & TDR_LNK_OK)
506 ;
507 else if(result & TDR_XCVR_PRB)
508 printk("%s: TDR: Transceiver problem. Check the cable(s)!\n",dev->name);
509 else if(result & TDR_ET_OPN)
510 printk("%s: TDR: No correct termination %d clocks away.\n",dev->name,result & TDR_TIMEMASK);
511 else if(result & TDR_ET_SRT)
512 {
513 if (result & TDR_TIMEMASK) /* time == 0 -> strange :-) */
514 printk("%s: TDR: Detected a short circuit %d clocks away.\n",dev->name,result & TDR_TIMEMASK);
515 }
516 else
517 printk("%s: TDR: Unknown status %04x\n",dev->name,result);
518 }
519
520 /*
521 * Multicast setup
522 */
523 if(num_addrs && !(dev->flags & IFF_PROMISC) )
524 {
525 mc_cmd = (struct mcsetup_cmd_struct *) ptr;
526 mc_cmd->cmd_status = 0;
527 mc_cmd->cmd_cmd = swab16(CMD_MCSETUP | CMD_LAST);
528 mc_cmd->cmd_link = 0xffff;
529 mc_cmd->mc_cnt = swab16(num_addrs * 6);
530
531 for(i=0;i<num_addrs;i++,dmi=dmi->next)
532 memcpy((char *) mc_cmd->mc_list[i], dmi->dmi_addr,6);
533
534 p->scb->cbl_offset = make16(mc_cmd);
535 p->scb->cmd_cuc = CUC_START;
536 sun3_attn586();
537
538 WAIT_4_STAT_COMPL(mc_cmd);
539
540 if( (swab16(mc_cmd->cmd_status) & (STAT_COMPL|STAT_OK)) != (STAT_COMPL|STAT_OK) )
541 printk("%s: Can't apply multicast-address-list.\n",dev->name);
542 }
543
544 /*
545 * alloc nop/xmit-cmds
546 */
547 #if (NUM_XMIT_BUFFS == 1)
548 for(i=0;i<2;i++)
549 {
550 p->nop_cmds[i] = (struct nop_cmd_struct *)ptr;
551 p->nop_cmds[i]->cmd_cmd = swab16(CMD_NOP);
552 p->nop_cmds[i]->cmd_status = 0;
553 p->nop_cmds[i]->cmd_link = make16((p->nop_cmds[i]));
554 ptr = (char *) ptr + sizeof(struct nop_cmd_struct);
555 }
556 #else
557 for(i=0;i<NUM_XMIT_BUFFS;i++)
558 {
559 p->nop_cmds[i] = (struct nop_cmd_struct *)ptr;
560 p->nop_cmds[i]->cmd_cmd = swab16(CMD_NOP);
561 p->nop_cmds[i]->cmd_status = 0;
562 p->nop_cmds[i]->cmd_link = make16((p->nop_cmds[i]));
563 ptr = (char *) ptr + sizeof(struct nop_cmd_struct);
564 }
565 #endif
566
567 ptr = alloc_rfa(dev,(void *)ptr); /* init receive-frame-area */
568
569 /*
570 * alloc xmit-buffs / init xmit_cmds
571 */
572 for(i=0;i<NUM_XMIT_BUFFS;i++)
573 {
574 p->xmit_cmds[i] = (struct transmit_cmd_struct *)ptr; /*transmit cmd/buff 0*/
575 ptr = (char *) ptr + sizeof(struct transmit_cmd_struct);
576 p->xmit_cbuffs[i] = (char *)ptr; /* char-buffs */
577 ptr = (char *) ptr + XMIT_BUFF_SIZE;
578 p->xmit_buffs[i] = (struct tbd_struct *)ptr; /* TBD */
579 ptr = (char *) ptr + sizeof(struct tbd_struct);
580 if((void *)ptr > (void *)dev->mem_end)
581 {
582 printk("%s: not enough shared-mem for your configuration!\n",dev->name);
583 return 1;
584 }
585 memset((char *)(p->xmit_cmds[i]) ,0, sizeof(struct transmit_cmd_struct));
586 memset((char *)(p->xmit_buffs[i]),0, sizeof(struct tbd_struct));
587 p->xmit_cmds[i]->cmd_link = make16(p->nop_cmds[(i+1)%NUM_XMIT_BUFFS]);
588 p->xmit_cmds[i]->cmd_status = swab16(STAT_COMPL);
589 p->xmit_cmds[i]->cmd_cmd = swab16(CMD_XMIT | CMD_INT);
590 p->xmit_cmds[i]->tbd_offset = make16((p->xmit_buffs[i]));
591 p->xmit_buffs[i]->next = 0xffff;
592 p->xmit_buffs[i]->buffer = make24((p->xmit_cbuffs[i]));
593 }
594
595 p->xmit_count = 0;
596 p->xmit_last = 0;
597 #ifndef NO_NOPCOMMANDS
598 p->nop_point = 0;
599 #endif
600
601 /*
602 * 'start transmitter'
603 */
604 #ifndef NO_NOPCOMMANDS
605 p->scb->cbl_offset = make16(p->nop_cmds[0]);
606 p->scb->cmd_cuc = CUC_START;
607 sun3_attn586();
608 WAIT_4_SCB_CMD();
609 #else
610 p->xmit_cmds[0]->cmd_link = make16(p->xmit_cmds[0]);
611 p->xmit_cmds[0]->cmd_cmd = swab16(CMD_XMIT | CMD_SUSPEND | CMD_INT);
612 #endif
613
614 /*
615 * ack. interrupts
616 */
617 p->scb->cmd_cuc = p->scb->cus & STAT_MASK;
618 sun3_attn586();
619 DELAY_16();
620
621 sun3_enaint();
622 sun3_active();
623
624 return 0;
625 }
626
627 /******************************************************
628 * This is a helper routine for sun3_82586_rnr_int() and init586().
629 * It sets up the Receive Frame Area (RFA).
630 */
631
632 static void *alloc_rfa(struct net_device *dev,void *ptr)
633 {
634 volatile struct rfd_struct *rfd = (struct rfd_struct *)ptr;
635 volatile struct rbd_struct *rbd;
636 int i;
637 struct priv *p = (struct priv *) dev->priv;
638
639 memset((char *) rfd,0,sizeof(struct rfd_struct)*(p->num_recv_buffs+rfdadd));
640 p->rfd_first = rfd;
641
642 for(i = 0; i < (p->num_recv_buffs+rfdadd); i++) {
643 rfd[i].next = make16(rfd + (i+1) % (p->num_recv_buffs+rfdadd) );
644 rfd[i].rbd_offset = 0xffff;
645 }
646 rfd[p->num_recv_buffs-1+rfdadd].last = RFD_SUSP; /* RU suspend */
647
648 ptr = (void *) (rfd + (p->num_recv_buffs + rfdadd) );
649
650 rbd = (struct rbd_struct *) ptr;
651 ptr = (void *) (rbd + p->num_recv_buffs);
652
653 /* clr descriptors */
654 memset((char *) rbd,0,sizeof(struct rbd_struct)*(p->num_recv_buffs));
655
656 for(i=0;i<p->num_recv_buffs;i++)
657 {
658 rbd[i].next = make16((rbd + (i+1) % p->num_recv_buffs));
659 rbd[i].size = swab16(RECV_BUFF_SIZE);
660 rbd[i].buffer = make24(ptr);
661 ptr = (char *) ptr + RECV_BUFF_SIZE;
662 }
663
664 p->rfd_top = p->rfd_first;
665 p->rfd_last = p->rfd_first + (p->num_recv_buffs - 1 + rfdadd);
666
667 p->scb->rfa_offset = make16(p->rfd_first);
668 p->rfd_first->rbd_offset = make16(rbd);
669
670 return ptr;
671 }
672
673
674 /**************************************************
675 * Interrupt Handler ...
676 */
677
678 static irqreturn_t sun3_82586_interrupt(int irq,void *dev_id)
679 {
680 struct net_device *dev = dev_id;
681 unsigned short stat;
682 int cnt=0;
683 struct priv *p;
684
685 if (!dev) {
686 printk ("sun3_82586-interrupt: irq %d for unknown device.\n",irq);
687 return IRQ_NONE;
688 }
689 p = (struct priv *) dev->priv;
690
691 if(debuglevel > 1)
692 printk("I");
693
694 WAIT_4_SCB_CMD(); /* wait for last command */
695
696 while((stat=p->scb->cus & STAT_MASK))
697 {
698 p->scb->cmd_cuc = stat;
699 sun3_attn586();
700
701 if(stat & STAT_FR) /* received a frame */
702 sun3_82586_rcv_int(dev);
703
704 if(stat & STAT_RNR) /* RU went 'not ready' */
705 {
706 printk("(R)");
707 if(p->scb->rus & RU_SUSPEND) /* special case: RU_SUSPEND */
708 {
709 WAIT_4_SCB_CMD();
710 p->scb->cmd_ruc = RUC_RESUME;
711 sun3_attn586();
712 WAIT_4_SCB_CMD_RUC();
713 }
714 else
715 {
716 printk("%s: Receiver-Unit went 'NOT READY': %04x/%02x.\n",dev->name,(int) stat,(int) p->scb->rus);
717 sun3_82586_rnr_int(dev);
718 }
719 }
720
721 if(stat & STAT_CX) /* command with I-bit set complete */
722 sun3_82586_xmt_int(dev);
723
724 #ifndef NO_NOPCOMMANDS
725 if(stat & STAT_CNA) /* CU went 'not ready' */
726 {
727 if(netif_running(dev))
728 printk("%s: oops! CU has left active state. stat: %04x/%02x.\n",dev->name,(int) stat,(int) p->scb->cus);
729 }
730 #endif
731
732 if(debuglevel > 1)
733 printk("%d",cnt++);
734
735 WAIT_4_SCB_CMD(); /* wait for ack. (sun3_82586_xmt_int can be faster than ack!!) */
736 if(p->scb->cmd_cuc) /* timed out? */
737 {
738 printk("%s: Acknowledge timed out.\n",dev->name);
739 sun3_disint();
740 break;
741 }
742 }
743
744 if(debuglevel > 1)
745 printk("i");
746 return IRQ_HANDLED;
747 }
748
749 /*******************************************************
750 * receive-interrupt
751 */
752
753 static void sun3_82586_rcv_int(struct net_device *dev)
754 {
755 int status,cnt=0;
756 unsigned short totlen;
757 struct sk_buff *skb;
758 struct rbd_struct *rbd;
759 struct priv *p = (struct priv *) dev->priv;
760
761 if(debuglevel > 0)
762 printk("R");
763
764 for(;(status = p->rfd_top->stat_high) & RFD_COMPL;)
765 {
766 rbd = (struct rbd_struct *) make32(p->rfd_top->rbd_offset);
767
768 if(status & RFD_OK) /* frame received without error? */
769 {
770 if( (totlen = swab16(rbd->status)) & RBD_LAST) /* the first and the last buffer? */
771 {
772 totlen &= RBD_MASK; /* length of this frame */
773 rbd->status = 0;
774 skb = (struct sk_buff *) dev_alloc_skb(totlen+2);
775 if(skb != NULL)
776 {
777 skb_reserve(skb,2);
778 skb_put(skb,totlen);
779 skb_copy_to_linear_data(skb,(char *) p->base+swab32((unsigned long) rbd->buffer),totlen);
780 skb->protocol=eth_type_trans(skb,dev);
781 netif_rx(skb);
782 p->stats.rx_packets++;
783 }
784 else
785 p->stats.rx_dropped++;
786 }
787 else
788 {
789 int rstat;
790 /* free all RBD's until RBD_LAST is set */
791 totlen = 0;
792 while(!((rstat=swab16(rbd->status)) & RBD_LAST))
793 {
794 totlen += rstat & RBD_MASK;
795 if(!rstat)
796 {
797 printk("%s: Whoops .. no end mark in RBD list\n",dev->name);
798 break;
799 }
800 rbd->status = 0;
801 rbd = (struct rbd_struct *) make32(rbd->next);
802 }
803 totlen += rstat & RBD_MASK;
804 rbd->status = 0;
805 printk("%s: received oversized frame! length: %d\n",dev->name,totlen);
806 p->stats.rx_dropped++;
807 }
808 }
809 else /* frame !(ok), only with 'save-bad-frames' */
810 {
811 printk("%s: oops! rfd-error-status: %04x\n",dev->name,status);
812 p->stats.rx_errors++;
813 }
814 p->rfd_top->stat_high = 0;
815 p->rfd_top->last = RFD_SUSP; /* maybe exchange by RFD_LAST */
816 p->rfd_top->rbd_offset = 0xffff;
817 p->rfd_last->last = 0; /* delete RFD_SUSP */
818 p->rfd_last = p->rfd_top;
819 p->rfd_top = (struct rfd_struct *) make32(p->rfd_top->next); /* step to next RFD */
820 p->scb->rfa_offset = make16(p->rfd_top);
821
822 if(debuglevel > 0)
823 printk("%d",cnt++);
824 }
825
826 if(automatic_resume)
827 {
828 WAIT_4_SCB_CMD();
829 p->scb->cmd_ruc = RUC_RESUME;
830 sun3_attn586();
831 WAIT_4_SCB_CMD_RUC();
832 }
833
834 #ifdef WAIT_4_BUSY
835 {
836 int i;
837 for(i=0;i<1024;i++)
838 {
839 if(p->rfd_top->status)
840 break;
841 DELAY_16();
842 if(i == 1023)
843 printk("%s: RU hasn't fetched next RFD (not busy/complete)\n",dev->name);
844 }
845 }
846 #endif
847
848 #if 0
849 if(!at_least_one)
850 {
851 int i;
852 volatile struct rfd_struct *rfds=p->rfd_top;
853 volatile struct rbd_struct *rbds;
854 printk("%s: received a FC intr. without having a frame: %04x %d\n",dev->name,status,old_at_least);
855 for(i=0;i< (p->num_recv_buffs+4);i++)
856 {
857 rbds = (struct rbd_struct *) make32(rfds->rbd_offset);
858 printk("%04x:%04x ",rfds->status,rbds->status);
859 rfds = (struct rfd_struct *) make32(rfds->next);
860 }
861 printk("\nerrs: %04x %04x stat: %04x\n",(int)p->scb->rsc_errs,(int)p->scb->ovrn_errs,(int)p->scb->status);
862 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);
863 }
864 old_at_least = at_least_one;
865 #endif
866
867 if(debuglevel > 0)
868 printk("r");
869 }
870
871 /**********************************************************
872 * handle 'Receiver went not ready'.
873 */
874
875 static void sun3_82586_rnr_int(struct net_device *dev)
876 {
877 struct priv *p = (struct priv *) dev->priv;
878
879 p->stats.rx_errors++;
880
881 WAIT_4_SCB_CMD(); /* wait for the last cmd, WAIT_4_FULLSTAT?? */
882 p->scb->cmd_ruc = RUC_ABORT; /* usually the RU is in the 'no resource'-state .. abort it now. */
883 sun3_attn586();
884 WAIT_4_SCB_CMD_RUC(); /* wait for accept cmd. */
885
886 alloc_rfa(dev,(char *)p->rfd_first);
887 /* maybe add a check here, before restarting the RU */
888 startrecv586(dev); /* restart RU */
889
890 printk("%s: Receive-Unit restarted. Status: %04x\n",dev->name,p->scb->rus);
891
892 }
893
894 /**********************************************************
895 * handle xmit - interrupt
896 */
897
898 static void sun3_82586_xmt_int(struct net_device *dev)
899 {
900 int status;
901 struct priv *p = (struct priv *) dev->priv;
902
903 if(debuglevel > 0)
904 printk("X");
905
906 status = swab16(p->xmit_cmds[p->xmit_last]->cmd_status);
907 if(!(status & STAT_COMPL))
908 printk("%s: strange .. xmit-int without a 'COMPLETE'\n",dev->name);
909
910 if(status & STAT_OK)
911 {
912 p->stats.tx_packets++;
913 p->stats.collisions += (status & TCMD_MAXCOLLMASK);
914 }
915 else
916 {
917 p->stats.tx_errors++;
918 if(status & TCMD_LATECOLL) {
919 printk("%s: late collision detected.\n",dev->name);
920 p->stats.collisions++;
921 }
922 else if(status & TCMD_NOCARRIER) {
923 p->stats.tx_carrier_errors++;
924 printk("%s: no carrier detected.\n",dev->name);
925 }
926 else if(status & TCMD_LOSTCTS)
927 printk("%s: loss of CTS detected.\n",dev->name);
928 else if(status & TCMD_UNDERRUN) {
929 p->stats.tx_fifo_errors++;
930 printk("%s: DMA underrun detected.\n",dev->name);
931 }
932 else if(status & TCMD_MAXCOLL) {
933 printk("%s: Max. collisions exceeded.\n",dev->name);
934 p->stats.collisions += 16;
935 }
936 }
937
938 #if (NUM_XMIT_BUFFS > 1)
939 if( (++p->xmit_last) == NUM_XMIT_BUFFS)
940 p->xmit_last = 0;
941 #endif
942 netif_wake_queue(dev);
943 }
944
945 /***********************************************************
946 * (re)start the receiver
947 */
948
949 static void startrecv586(struct net_device *dev)
950 {
951 struct priv *p = (struct priv *) dev->priv;
952
953 WAIT_4_SCB_CMD();
954 WAIT_4_SCB_CMD_RUC();
955 p->scb->rfa_offset = make16(p->rfd_first);
956 p->scb->cmd_ruc = RUC_START;
957 sun3_attn586(); /* start cmd. */
958 WAIT_4_SCB_CMD_RUC(); /* wait for accept cmd. (no timeout!!) */
959 }
960
961 static void sun3_82586_timeout(struct net_device *dev)
962 {
963 struct priv *p = (struct priv *) dev->priv;
964 #ifndef NO_NOPCOMMANDS
965 if(p->scb->cus & CU_ACTIVE) /* COMMAND-UNIT active? */
966 {
967 netif_wake_queue(dev);
968 #ifdef DEBUG
969 printk("%s: strange ... timeout with CU active?!?\n",dev->name);
970 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);
971 #endif
972 p->scb->cmd_cuc = CUC_ABORT;
973 sun3_attn586();
974 WAIT_4_SCB_CMD();
975 p->scb->cbl_offset = make16(p->nop_cmds[p->nop_point]);
976 p->scb->cmd_cuc = CUC_START;
977 sun3_attn586();
978 WAIT_4_SCB_CMD();
979 dev->trans_start = jiffies;
980 return 0;
981 }
982 #endif
983 {
984 #ifdef DEBUG
985 printk("%s: xmitter timed out, try to restart! stat: %02x\n",dev->name,p->scb->cus);
986 printk("%s: command-stats: %04x %04x\n",dev->name,swab16(p->xmit_cmds[0]->cmd_status),swab16(p->xmit_cmds[1]->cmd_status));
987 printk("%s: check, whether you set the right interrupt number!\n",dev->name);
988 #endif
989 sun3_82586_close(dev);
990 sun3_82586_open(dev);
991 }
992 dev->trans_start = jiffies;
993 }
994
995 /******************************************************
996 * send frame
997 */
998
999 static int sun3_82586_send_packet(struct sk_buff *skb, struct net_device *dev)
1000 {
1001 int len,i;
1002 #ifndef NO_NOPCOMMANDS
1003 int next_nop;
1004 #endif
1005 struct priv *p = (struct priv *) dev->priv;
1006
1007 if(skb->len > XMIT_BUFF_SIZE)
1008 {
1009 printk("%s: Sorry, max. framelength is %d bytes. The length of your frame is %d bytes.\n",dev->name,XMIT_BUFF_SIZE,skb->len);
1010 return 0;
1011 }
1012
1013 netif_stop_queue(dev);
1014
1015 #if(NUM_XMIT_BUFFS > 1)
1016 if(test_and_set_bit(0,(void *) &p->lock)) {
1017 printk("%s: Queue was locked\n",dev->name);
1018 return 1;
1019 }
1020 else
1021 #endif
1022 {
1023 len = skb->len;
1024 if (len < ETH_ZLEN) {
1025 memset((void *)p->xmit_cbuffs[p->xmit_count], 0,
1026 ETH_ZLEN);
1027 len = ETH_ZLEN;
1028 }
1029 skb_copy_from_linear_data(skb, (void *)p->xmit_cbuffs[p->xmit_count], skb->len);
1030
1031 #if (NUM_XMIT_BUFFS == 1)
1032 # ifdef NO_NOPCOMMANDS
1033
1034 #ifdef DEBUG
1035 if(p->scb->cus & CU_ACTIVE)
1036 {
1037 printk("%s: Hmmm .. CU is still running and we wanna send a new packet.\n",dev->name);
1038 printk("%s: stat: %04x %04x\n",dev->name,p->scb->cus,swab16(p->xmit_cmds[0]->cmd_status));
1039 }
1040 #endif
1041
1042 p->xmit_buffs[0]->size = swab16(TBD_LAST | len);
1043 for(i=0;i<16;i++)
1044 {
1045 p->xmit_cmds[0]->cmd_status = 0;
1046 WAIT_4_SCB_CMD();
1047 if( (p->scb->cus & CU_STATUS) == CU_SUSPEND)
1048 p->scb->cmd_cuc = CUC_RESUME;
1049 else
1050 {
1051 p->scb->cbl_offset = make16(p->xmit_cmds[0]);
1052 p->scb->cmd_cuc = CUC_START;
1053 }
1054
1055 sun3_attn586();
1056 dev->trans_start = jiffies;
1057 if(!i)
1058 dev_kfree_skb(skb);
1059 WAIT_4_SCB_CMD();
1060 if( (p->scb->cus & CU_ACTIVE)) /* test it, because CU sometimes doesn't start immediately */
1061 break;
1062 if(p->xmit_cmds[0]->cmd_status)
1063 break;
1064 if(i==15)
1065 printk("%s: Can't start transmit-command.\n",dev->name);
1066 }
1067 # else
1068 next_nop = (p->nop_point + 1) & 0x1;
1069 p->xmit_buffs[0]->size = swab16(TBD_LAST | len);
1070
1071 p->xmit_cmds[0]->cmd_link = p->nop_cmds[next_nop]->cmd_link
1072 = make16((p->nop_cmds[next_nop]));
1073 p->xmit_cmds[0]->cmd_status = p->nop_cmds[next_nop]->cmd_status = 0;
1074
1075 p->nop_cmds[p->nop_point]->cmd_link = make16((p->xmit_cmds[0]));
1076 dev->trans_start = jiffies;
1077 p->nop_point = next_nop;
1078 dev_kfree_skb(skb);
1079 # endif
1080 #else
1081 p->xmit_buffs[p->xmit_count]->size = swab16(TBD_LAST | len);
1082 if( (next_nop = p->xmit_count + 1) == NUM_XMIT_BUFFS )
1083 next_nop = 0;
1084
1085 p->xmit_cmds[p->xmit_count]->cmd_status = 0;
1086 /* linkpointer of xmit-command already points to next nop cmd */
1087 p->nop_cmds[next_nop]->cmd_link = make16((p->nop_cmds[next_nop]));
1088 p->nop_cmds[next_nop]->cmd_status = 0;
1089
1090 p->nop_cmds[p->xmit_count]->cmd_link = make16((p->xmit_cmds[p->xmit_count]));
1091 dev->trans_start = jiffies;
1092 p->xmit_count = next_nop;
1093
1094 {
1095 unsigned long flags;
1096 local_irq_save(flags);
1097 if(p->xmit_count != p->xmit_last)
1098 netif_wake_queue(dev);
1099 p->lock = 0;
1100 local_irq_restore(flags);
1101 }
1102 dev_kfree_skb(skb);
1103 #endif
1104 }
1105 return 0;
1106 }
1107
1108 /*******************************************
1109 * Someone wanna have the statistics
1110 */
1111
1112 static struct net_device_stats *sun3_82586_get_stats(struct net_device *dev)
1113 {
1114 struct priv *p = (struct priv *) dev->priv;
1115 unsigned short crc,aln,rsc,ovrn;
1116
1117 crc = swab16(p->scb->crc_errs); /* get error-statistic from the ni82586 */
1118 p->scb->crc_errs = 0;
1119 aln = swab16(p->scb->aln_errs);
1120 p->scb->aln_errs = 0;
1121 rsc = swab16(p->scb->rsc_errs);
1122 p->scb->rsc_errs = 0;
1123 ovrn = swab16(p->scb->ovrn_errs);
1124 p->scb->ovrn_errs = 0;
1125
1126 p->stats.rx_crc_errors += crc;
1127 p->stats.rx_fifo_errors += ovrn;
1128 p->stats.rx_frame_errors += aln;
1129 p->stats.rx_dropped += rsc;
1130
1131 return &p->stats;
1132 }
1133
1134 /********************************************************
1135 * Set MC list ..
1136 */
1137
1138 static void set_multicast_list(struct net_device *dev)
1139 {
1140 netif_stop_queue(dev);
1141 sun3_disint();
1142 alloc586(dev);
1143 init586(dev);
1144 startrecv586(dev);
1145 sun3_enaint();
1146 netif_wake_queue(dev);
1147 }
1148
1149 #ifdef MODULE
1150 #error This code is not currently supported as a module
1151 static struct net_device *dev_sun3_82586;
1152
1153 int init_module(void)
1154 {
1155 dev_sun3_82586 = sun3_82586_probe(-1);
1156 if (IS_ERR(dev_sun3_82586))
1157 return PTR_ERR(dev_sun3_82586);
1158 return 0;
1159 }
1160
1161 void cleanup_module(void)
1162 {
1163 unsigned long ioaddr = dev_sun3_82586->base_addr;
1164 unregister_netdev(dev_sun3_82586);
1165 release_region(ioaddr, SUN3_82586_TOTAL_SIZE);
1166 iounmap((void *)ioaddr);
1167 free_netdev(dev_sun3_82586);
1168 }
1169 #endif /* MODULE */
1170
1171 #if 0
1172 /*
1173 * DUMP .. we expect a not running CMD unit and enough space
1174 */
1175 void sun3_82586_dump(struct net_device *dev,void *ptr)
1176 {
1177 struct priv *p = (struct priv *) dev->priv;
1178 struct dump_cmd_struct *dump_cmd = (struct dump_cmd_struct *) ptr;
1179 int i;
1180
1181 p->scb->cmd_cuc = CUC_ABORT;
1182 sun3_attn586();
1183 WAIT_4_SCB_CMD();
1184 WAIT_4_SCB_CMD_RUC();
1185
1186 dump_cmd->cmd_status = 0;
1187 dump_cmd->cmd_cmd = CMD_DUMP | CMD_LAST;
1188 dump_cmd->dump_offset = make16((dump_cmd + 1));
1189 dump_cmd->cmd_link = 0xffff;
1190
1191 p->scb->cbl_offset = make16(dump_cmd);
1192 p->scb->cmd_cuc = CUC_START;
1193 sun3_attn586();
1194 WAIT_4_STAT_COMPL(dump_cmd);
1195
1196 if( (dump_cmd->cmd_status & (STAT_COMPL|STAT_OK)) != (STAT_COMPL|STAT_OK) )
1197 printk("%s: Can't get dump information.\n",dev->name);
1198
1199 for(i=0;i<170;i++) {
1200 printk("%02x ",(int) ((unsigned char *) (dump_cmd + 1))[i]);
1201 if(i % 24 == 23)
1202 printk("\n");
1203 }
1204 printk("\n");
1205 }
1206 #endif
1207
1208 MODULE_LICENSE("GPL");
WRT350N Kernel Patches