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ext4: Fix deadlock in ext4_write_begin() and ext4_da_write_begin()
[linux-2.6/mini2440.git] / drivers / net / ni65.c
blob254057275e0e32eccb17bd1c26cad8b5754e125a
1 /*
2 * ni6510 (am7990 'lance' chip) driver for Linux-net-3
3 * BETAcode v0.71 (96/09/29) for 2.0.0 (or later)
4 * copyrights (c) 1994,1995,1996 by M.Hipp
5 *
6 * This driver can handle the old ni6510 board and the newer ni6510
7 * EtherBlaster. (probably it also works with every full NE2100
8 * compatible card)
9 *
10 * driver probes: io: 0x360,0x300,0x320,0x340 / dma: 3,5,6,7
11 *
12 * This is an extension to the Linux operating system, and is covered by the
13 * same GNU General Public License that covers the Linux-kernel.
14 *
15 * comments/bugs/suggestions can be sent to:
16 * Michael Hipp
17 * email: hippm@informatik.uni-tuebingen.de
18 *
19 * sources:
20 * some things are from the 'ni6510-packet-driver for dos by Russ Nelson'
21 * and from the original drivers by D.Becker
22 *
23 * known problems:
24 * - on some PCI boards (including my own) the card/board/ISA-bridge has
25 * problems with bus master DMA. This results in lotsa overruns.
26 * It may help to '#define RCV_PARANOIA_CHECK' or try to #undef
27 * the XMT and RCV_VIA_SKB option .. this reduces driver performance.
28 * Or just play with your BIOS options to optimize ISA-DMA access.
29 * Maybe you also wanna play with the LOW_PERFORAMCE and MID_PERFORMANCE
30 * defines -> please report me your experience then
31 * - Harald reported for ASUS SP3G mainboards, that you should use
32 * the 'optimal settings' from the user's manual on page 3-12!
33 *
34 * credits:
35 * thanx to Jason Sullivan for sending me a ni6510 card!
36 * lot of debug runs with ASUS SP3G Boards (Intel Saturn) by Harald Koenig
37 *
38 * simple performance test: (486DX-33/Ni6510-EB receives from 486DX4-100/Ni6510-EB)
39 * average: FTP -> 8384421 bytes received in 8.5 seconds
40 * (no RCV_VIA_SKB,no XMT_VIA_SKB,PARANOIA_CHECK,4 XMIT BUFS, 8 RCV_BUFFS)
41 * peak: FTP -> 8384421 bytes received in 7.5 seconds
42 * (RCV_VIA_SKB,XMT_VIA_SKB,no PARANOIA_CHECK,1(!) XMIT BUF, 16 RCV BUFFS)
43 */
44
45 /*
46 * 99.Jun.8: added support for /proc/net/dev byte count for xosview (HK)
47 * 96.Sept.29: virt_to_bus stuff added for new memory modell
48 * 96.April.29: Added Harald Koenig's Patches (MH)
49 * 96.April.13: enhanced error handling .. more tests (MH)
50 * 96.April.5/6: a lot of performance tests. Got it stable now (hopefully) (MH)
51 * 96.April.1: (no joke ;) .. added EtherBlaster and Module support (MH)
52 * 96.Feb.19: fixed a few bugs .. cleanups .. tested for 1.3.66 (MH)
53 * hopefully no more 16MB limit
54 *
55 * 95.Nov.18: multicast tweaked (AC).
56 *
57 * 94.Aug.22: changes in xmit_intr (ack more than one xmitted-packet), ni65_send_packet (p->lock) (MH)
58 *
59 * 94.July.16: fixed bugs in recv_skb and skb-alloc stuff (MH)
60 */
61
62 #include <linux/kernel.h>
63 #include <linux/string.h>
64 #include <linux/errno.h>
65 #include <linux/ioport.h>
66 #include <linux/slab.h>
67 #include <linux/interrupt.h>
68 #include <linux/delay.h>
69 #include <linux/init.h>
70 #include <linux/netdevice.h>
71 #include <linux/etherdevice.h>
72 #include <linux/skbuff.h>
73 #include <linux/module.h>
74 #include <linux/bitops.h>
75
76 #include <asm/io.h>
77 #include <asm/dma.h>
78
79 #include "ni65.h"
80
81 /*
82 * the current setting allows an acceptable performance
83 * for 'RCV_PARANOIA_CHECK' read the 'known problems' part in
84 * the header of this file
85 * 'invert' the defines for max. performance. This may cause DMA problems
86 * on some boards (e.g on my ASUS SP3G)
87 */
88 #undef XMT_VIA_SKB
89 #undef RCV_VIA_SKB
90 #define RCV_PARANOIA_CHECK
91
92 #define MID_PERFORMANCE
93
94 #if defined( LOW_PERFORMANCE )
95 static int isa0=7,isa1=7,csr80=0x0c10;
96 #elif defined( MID_PERFORMANCE )
97 static int isa0=5,isa1=5,csr80=0x2810;
98 #else /* high performance */
99 static int isa0=4,isa1=4,csr80=0x0017;
100 #endif
101
102 /*
103 * a few card/vendor specific defines
104 */
105 #define NI65_ID0 0x00
106 #define NI65_ID1 0x55
107 #define NI65_EB_ID0 0x52
108 #define NI65_EB_ID1 0x44
109 #define NE2100_ID0 0x57
110 #define NE2100_ID1 0x57
111
112 #define PORT p->cmdr_addr
113
114 /*
115 * buffer configuration
116 */
117 #if 1
118 #define RMDNUM 16
119 #define RMDNUMMASK 0x80000000
120 #else
121 #define RMDNUM 8
122 #define RMDNUMMASK 0x60000000 /* log2(RMDNUM)<<29 */
123 #endif
124
125 #if 0
126 #define TMDNUM 1
127 #define TMDNUMMASK 0x00000000
128 #else
129 #define TMDNUM 4
130 #define TMDNUMMASK 0x40000000 /* log2(TMDNUM)<<29 */
131 #endif
132
133 /* slightly oversized */
134 #define R_BUF_SIZE 1544
135 #define T_BUF_SIZE 1544
136
137 /*
138 * lance register defines
139 */
140 #define L_DATAREG 0x00
141 #define L_ADDRREG 0x02
142 #define L_RESET 0x04
143 #define L_CONFIG 0x05
144 #define L_BUSIF 0x06
145
146 /*
147 * to access the lance/am7990-regs, you have to write
148 * reg-number into L_ADDRREG, then you can access it using L_DATAREG
149 */
150 #define CSR0 0x00
151 #define CSR1 0x01
152 #define CSR2 0x02
153 #define CSR3 0x03
154
155 #define INIT_RING_BEFORE_START 0x1
156 #define FULL_RESET_ON_ERROR 0x2
157
158 #if 0
159 #define writereg(val,reg) {outw(reg,PORT+L_ADDRREG);inw(PORT+L_ADDRREG); \
160 outw(val,PORT+L_DATAREG);inw(PORT+L_DATAREG);}
161 #define readreg(reg) (outw(reg,PORT+L_ADDRREG),inw(PORT+L_ADDRREG),\
162 inw(PORT+L_DATAREG))
163 #if 0
164 #define writedatareg(val) {outw(val,PORT+L_DATAREG);inw(PORT+L_DATAREG);}
165 #else
166 #define writedatareg(val) { writereg(val,CSR0); }
167 #endif
168 #else
169 #define writereg(val,reg) {outw(reg,PORT+L_ADDRREG);outw(val,PORT+L_DATAREG);}
170 #define readreg(reg) (outw(reg,PORT+L_ADDRREG),inw(PORT+L_DATAREG))
171 #define writedatareg(val) { writereg(val,CSR0); }
172 #endif
173
174 static unsigned char ni_vendor[] = { 0x02,0x07,0x01 };
175
176 static struct card {
177 unsigned char id0,id1;
178 short id_offset;
179 short total_size;
180 short cmd_offset;
181 short addr_offset;
182 unsigned char *vendor_id;
183 char *cardname;
184 unsigned long config;
185 } cards[] = {
186 {
187 .id0 = NI65_ID0,
188 .id1 = NI65_ID1,
189 .id_offset = 0x0e,
190 .total_size = 0x10,
191 .cmd_offset = 0x0,
192 .addr_offset = 0x8,
193 .vendor_id = ni_vendor,
194 .cardname = "ni6510",
195 .config = 0x1,
196 },
197 {
198 .id0 = NI65_EB_ID0,
199 .id1 = NI65_EB_ID1,
200 .id_offset = 0x0e,
201 .total_size = 0x18,
202 .cmd_offset = 0x10,
203 .addr_offset = 0x0,
204 .vendor_id = ni_vendor,
205 .cardname = "ni6510 EtherBlaster",
206 .config = 0x2,
207 },
208 {
209 .id0 = NE2100_ID0,
210 .id1 = NE2100_ID1,
211 .id_offset = 0x0e,
212 .total_size = 0x18,
213 .cmd_offset = 0x10,
214 .addr_offset = 0x0,
215 .vendor_id = NULL,
216 .cardname = "generic NE2100",
217 .config = 0x0,
218 },
219 };
220 #define NUM_CARDS 3
221
222 struct priv
223 {
224 struct rmd rmdhead[RMDNUM];
225 struct tmd tmdhead[TMDNUM];
226 struct init_block ib;
227 int rmdnum;
228 int tmdnum,tmdlast;
229 #ifdef RCV_VIA_SKB
230 struct sk_buff *recv_skb[RMDNUM];
231 #else
232 void *recvbounce[RMDNUM];
233 #endif
234 #ifdef XMT_VIA_SKB
235 struct sk_buff *tmd_skb[TMDNUM];
236 #endif
237 void *tmdbounce[TMDNUM];
238 int tmdbouncenum;
239 int lock,xmit_queued;
240 struct net_device_stats stats;
241 void *self;
242 int cmdr_addr;
243 int cardno;
244 int features;
245 spinlock_t ring_lock;
246 };
247
248 static int ni65_probe1(struct net_device *dev,int);
249 static irqreturn_t ni65_interrupt(int irq, void * dev_id);
250 static void ni65_recv_intr(struct net_device *dev,int);
251 static void ni65_xmit_intr(struct net_device *dev,int);
252 static int ni65_open(struct net_device *dev);
253 static int ni65_lance_reinit(struct net_device *dev);
254 static void ni65_init_lance(struct priv *p,unsigned char*,int,int);
255 static int ni65_send_packet(struct sk_buff *skb, struct net_device *dev);
256 static void ni65_timeout(struct net_device *dev);
257 static int ni65_close(struct net_device *dev);
258 static int ni65_alloc_buffer(struct net_device *dev);
259 static void ni65_free_buffer(struct priv *p);
260 static struct net_device_stats *ni65_get_stats(struct net_device *);
261 static void set_multicast_list(struct net_device *dev);
262
263 static int irqtab[] __initdata = { 9,12,15,5 }; /* irq config-translate */
264 static int dmatab[] __initdata = { 0,3,5,6,7 }; /* dma config-translate and autodetect */
265
266 static int debuglevel = 1;
267
268 /*
269 * set 'performance' registers .. we must STOP lance for that
270 */
271 static void ni65_set_performance(struct priv *p)
272 {
273 writereg(CSR0_STOP | CSR0_CLRALL,CSR0); /* STOP */
274
275 if( !(cards[p->cardno].config & 0x02) )
276 return;
277
278 outw(80,PORT+L_ADDRREG);
279 if(inw(PORT+L_ADDRREG) != 80)
280 return;
281
282 writereg( (csr80 & 0x3fff) ,80); /* FIFO watermarks */
283 outw(0,PORT+L_ADDRREG);
284 outw((short)isa0,PORT+L_BUSIF); /* write ISA 0: DMA_R : isa0 * 50ns */
285 outw(1,PORT+L_ADDRREG);
286 outw((short)isa1,PORT+L_BUSIF); /* write ISA 1: DMA_W : isa1 * 50ns */
287
288 outw(CSR0,PORT+L_ADDRREG); /* switch back to CSR0 */
289 }
290
291 /*
292 * open interface (up)
293 */
294 static int ni65_open(struct net_device *dev)
295 {
296 struct priv *p = dev->ml_priv;
297 int irqval = request_irq(dev->irq, &ni65_interrupt,0,
298 cards[p->cardno].cardname,dev);
299 if (irqval) {
300 printk(KERN_ERR "%s: unable to get IRQ %d (irqval=%d).\n",
301 dev->name,dev->irq, irqval);
302 return -EAGAIN;
303 }
304
305 if(ni65_lance_reinit(dev))
306 {
307 netif_start_queue(dev);
308 return 0;
309 }
310 else
311 {
312 free_irq(dev->irq,dev);
313 return -EAGAIN;
314 }
315 }
316
317 /*
318 * close interface (down)
319 */
320 static int ni65_close(struct net_device *dev)
321 {
322 struct priv *p = dev->ml_priv;
323
324 netif_stop_queue(dev);
325
326 outw(inw(PORT+L_RESET),PORT+L_RESET); /* that's the hard way */
327
328 #ifdef XMT_VIA_SKB
329 {
330 int i;
331 for(i=0;i<TMDNUM;i++)
332 {
333 if(p->tmd_skb[i]) {
334 dev_kfree_skb(p->tmd_skb[i]);
335 p->tmd_skb[i] = NULL;
336 }
337 }
338 }
339 #endif
340 free_irq(dev->irq,dev);
341 return 0;
342 }
343
344 static void cleanup_card(struct net_device *dev)
345 {
346 struct priv *p = dev->ml_priv;
347 disable_dma(dev->dma);
348 free_dma(dev->dma);
349 release_region(dev->base_addr, cards[p->cardno].total_size);
350 ni65_free_buffer(p);
351 }
352
353 /* set: io,irq,dma or set it when calling insmod */
354 static int irq;
355 static int io;
356 static int dma;
357
358 /*
359 * Probe The Card (not the lance-chip)
360 */
361 struct net_device * __init ni65_probe(int unit)
362 {
363 struct net_device *dev = alloc_etherdev(0);
364 static int ports[] = {0x360,0x300,0x320,0x340, 0};
365 int *port;
366 int err = 0;
367
368 if (!dev)
369 return ERR_PTR(-ENOMEM);
370
371 if (unit >= 0) {
372 sprintf(dev->name, "eth%d", unit);
373 netdev_boot_setup_check(dev);
374 irq = dev->irq;
375 dma = dev->dma;
376 } else {
377 dev->base_addr = io;
378 }
379
380 if (dev->base_addr > 0x1ff) { /* Check a single specified location. */
381 err = ni65_probe1(dev, dev->base_addr);
382 } else if (dev->base_addr > 0) { /* Don't probe at all. */
383 err = -ENXIO;
384 } else {
385 for (port = ports; *port && ni65_probe1(dev, *port); port++)
386 ;
387 if (!*port)
388 err = -ENODEV;
389 }
390 if (err)
391 goto out;
392
393 err = register_netdev(dev);
394 if (err)
395 goto out1;
396 return dev;
397 out1:
398 cleanup_card(dev);
399 out:
400 free_netdev(dev);
401 return ERR_PTR(err);
402 }
403
404 /*
405 * this is the real card probe ..
406 */
407 static int __init ni65_probe1(struct net_device *dev,int ioaddr)
408 {
409 int i,j;
410 struct priv *p;
411 unsigned long flags;
412
413 dev->irq = irq;
414 dev->dma = dma;
415
416 for(i=0;i<NUM_CARDS;i++) {
417 if(!request_region(ioaddr, cards[i].total_size, cards[i].cardname))
418 continue;
419 if(cards[i].id_offset >= 0) {
420 if(inb(ioaddr+cards[i].id_offset+0) != cards[i].id0 ||
421 inb(ioaddr+cards[i].id_offset+1) != cards[i].id1) {
422 release_region(ioaddr, cards[i].total_size);
423 continue;
424 }
425 }
426 if(cards[i].vendor_id) {
427 for(j=0;j<3;j++)
428 if(inb(ioaddr+cards[i].addr_offset+j) != cards[i].vendor_id[j]) {
429 release_region(ioaddr, cards[i].total_size);
430 continue;
431 }
432 }
433 break;
434 }
435 if(i == NUM_CARDS)
436 return -ENODEV;
437
438 for(j=0;j<6;j++)
439 dev->dev_addr[j] = inb(ioaddr+cards[i].addr_offset+j);
440
441 if( (j=ni65_alloc_buffer(dev)) < 0) {
442 release_region(ioaddr, cards[i].total_size);
443 return j;
444 }
445 p = dev->ml_priv;
446 p->cmdr_addr = ioaddr + cards[i].cmd_offset;
447 p->cardno = i;
448 spin_lock_init(&p->ring_lock);
449
450 printk(KERN_INFO "%s: %s found at %#3x, ", dev->name, cards[p->cardno].cardname , ioaddr);
451
452 outw(inw(PORT+L_RESET),PORT+L_RESET); /* first: reset the card */
453 if( (j=readreg(CSR0)) != 0x4) {
454 printk("failed.\n");
455 printk(KERN_ERR "%s: Can't RESET card: %04x\n", dev->name, j);
456 ni65_free_buffer(p);
457 release_region(ioaddr, cards[p->cardno].total_size);
458 return -EAGAIN;
459 }
460
461 outw(88,PORT+L_ADDRREG);
462 if(inw(PORT+L_ADDRREG) == 88) {
463 unsigned long v;
464 v = inw(PORT+L_DATAREG);
465 v <<= 16;
466 outw(89,PORT+L_ADDRREG);
467 v |= inw(PORT+L_DATAREG);
468 printk("Version %#08lx, ",v);
469 p->features = INIT_RING_BEFORE_START;
470 }
471 else {
472 printk("ancient LANCE, ");
473 p->features = 0x0;
474 }
475
476 if(test_bit(0,&cards[i].config)) {
477 dev->irq = irqtab[(inw(ioaddr+L_CONFIG)>>2)&3];
478 dev->dma = dmatab[inw(ioaddr+L_CONFIG)&3];
479 printk("IRQ %d (from card), DMA %d (from card).\n",dev->irq,dev->dma);
480 }
481 else {
482 if(dev->dma == 0) {
483 /* 'stuck test' from lance.c */
484 long dma_channels = ((inb(DMA1_STAT_REG) >> 4) & 0x0f) |
485 (inb(DMA2_STAT_REG) & 0xf0);
486 for(i=1;i<5;i++) {
487 int dma = dmatab[i];
488 if(test_bit(dma,&dma_channels) || request_dma(dma,"ni6510"))
489 continue;
490
491 flags=claim_dma_lock();
492 disable_dma(dma);
493 set_dma_mode(dma,DMA_MODE_CASCADE);
494 enable_dma(dma);
495 release_dma_lock(flags);
496
497 ni65_init_lance(p,dev->dev_addr,0,0); /* trigger memory access */
498
499 flags=claim_dma_lock();
500 disable_dma(dma);
501 free_dma(dma);
502 release_dma_lock(flags);
503
504 if(readreg(CSR0) & CSR0_IDON)
505 break;
506 }
507 if(i == 5) {
508 printk("failed.\n");
509 printk(KERN_ERR "%s: Can't detect DMA channel!\n", dev->name);
510 ni65_free_buffer(p);
511 release_region(ioaddr, cards[p->cardno].total_size);
512 return -EAGAIN;
513 }
514 dev->dma = dmatab[i];
515 printk("DMA %d (autodetected), ",dev->dma);
516 }
517 else
518 printk("DMA %d (assigned), ",dev->dma);
519
520 if(dev->irq < 2)
521 {
522 unsigned long irq_mask;
523
524 ni65_init_lance(p,dev->dev_addr,0,0);
525 irq_mask = probe_irq_on();
526 writereg(CSR0_INIT|CSR0_INEA,CSR0); /* trigger interrupt */
527 msleep(20);
528 dev->irq = probe_irq_off(irq_mask);
529 if(!dev->irq)
530 {
531 printk("Failed to detect IRQ line!\n");
532 ni65_free_buffer(p);
533 release_region(ioaddr, cards[p->cardno].total_size);
534 return -EAGAIN;
535 }
536 printk("IRQ %d (autodetected).\n",dev->irq);
537 }
538 else
539 printk("IRQ %d (assigned).\n",dev->irq);
540 }
541
542 if(request_dma(dev->dma, cards[p->cardno].cardname ) != 0)
543 {
544 printk(KERN_ERR "%s: Can't request dma-channel %d\n",dev->name,(int) dev->dma);
545 ni65_free_buffer(p);
546 release_region(ioaddr, cards[p->cardno].total_size);
547 return -EAGAIN;
548 }
549
550 dev->base_addr = ioaddr;
551 dev->open = ni65_open;
552 dev->stop = ni65_close;
553 dev->hard_start_xmit = ni65_send_packet;
554 dev->tx_timeout = ni65_timeout;
555 dev->watchdog_timeo = HZ/2;
556 dev->get_stats = ni65_get_stats;
557 dev->set_multicast_list = set_multicast_list;
558 return 0; /* everything is OK */
559 }
560
561 /*
562 * set lance register and trigger init
563 */
564 static void ni65_init_lance(struct priv *p,unsigned char *daddr,int filter,int mode)
565 {
566 int i;
567 u32 pib;
568
569 writereg(CSR0_CLRALL|CSR0_STOP,CSR0);
570
571 for(i=0;i<6;i++)
572 p->ib.eaddr[i] = daddr[i];
573
574 for(i=0;i<8;i++)
575 p->ib.filter[i] = filter;
576 p->ib.mode = mode;
577
578 p->ib.trp = (u32) isa_virt_to_bus(p->tmdhead) | TMDNUMMASK;
579 p->ib.rrp = (u32) isa_virt_to_bus(p->rmdhead) | RMDNUMMASK;
580 writereg(0,CSR3); /* busmaster/no word-swap */
581 pib = (u32) isa_virt_to_bus(&p->ib);
582 writereg(pib & 0xffff,CSR1);
583 writereg(pib >> 16,CSR2);
584
585 writereg(CSR0_INIT,CSR0); /* this changes L_ADDRREG to CSR0 */
586
587 for(i=0;i<32;i++)
588 {
589 mdelay(4);
590 if(inw(PORT+L_DATAREG) & (CSR0_IDON | CSR0_MERR) )
591 break; /* init ok ? */
592 }
593 }
594
595 /*
596 * allocate memory area and check the 16MB border
597 */
598 static void *ni65_alloc_mem(struct net_device *dev,char *what,int size,int type)
599 {
600 struct sk_buff *skb=NULL;
601 unsigned char *ptr;
602 void *ret;
603
604 if(type) {
605 ret = skb = alloc_skb(2+16+size,GFP_KERNEL|GFP_DMA);
606 if(!skb) {
607 printk(KERN_WARNING "%s: unable to allocate %s memory.\n",dev->name,what);
608 return NULL;
609 }
610 skb_reserve(skb,2+16);
611 skb_put(skb,R_BUF_SIZE); /* grab the whole space .. (not necessary) */
612 ptr = skb->data;
613 }
614 else {
615 ret = ptr = kmalloc(T_BUF_SIZE,GFP_KERNEL | GFP_DMA);
616 if(!ret) {
617 printk(KERN_WARNING "%s: unable to allocate %s memory.\n",dev->name,what);
618 return NULL;
619 }
620 }
621 if( (u32) virt_to_phys(ptr+size) > 0x1000000) {
622 printk(KERN_WARNING "%s: unable to allocate %s memory in lower 16MB!\n",dev->name,what);
623 if(type)
624 kfree_skb(skb);
625 else
626 kfree(ptr);
627 return NULL;
628 }
629 return ret;
630 }
631
632 /*
633 * allocate all memory structures .. send/recv buffers etc ...
634 */
635 static int ni65_alloc_buffer(struct net_device *dev)
636 {
637 unsigned char *ptr;
638 struct priv *p;
639 int i;
640
641 /*
642 * we need 8-aligned memory ..
643 */
644 ptr = ni65_alloc_mem(dev,"BUFFER",sizeof(struct priv)+8,0);
645 if(!ptr)
646 return -ENOMEM;
647
648 p = dev->ml_priv = (struct priv *) (((unsigned long) ptr + 7) & ~0x7);
649 memset((char *)p, 0, sizeof(struct priv));
650 p->self = ptr;
651
652 for(i=0;i<TMDNUM;i++)
653 {
654 #ifdef XMT_VIA_SKB
655 p->tmd_skb[i] = NULL;
656 #endif
657 p->tmdbounce[i] = ni65_alloc_mem(dev,"XMIT",T_BUF_SIZE,0);
658 if(!p->tmdbounce[i]) {
659 ni65_free_buffer(p);
660 return -ENOMEM;
661 }
662 }
663
664 for(i=0;i<RMDNUM;i++)
665 {
666 #ifdef RCV_VIA_SKB
667 p->recv_skb[i] = ni65_alloc_mem(dev,"RECV",R_BUF_SIZE,1);
668 if(!p->recv_skb[i]) {
669 ni65_free_buffer(p);
670 return -ENOMEM;
671 }
672 #else
673 p->recvbounce[i] = ni65_alloc_mem(dev,"RECV",R_BUF_SIZE,0);
674 if(!p->recvbounce[i]) {
675 ni65_free_buffer(p);
676 return -ENOMEM;
677 }
678 #endif
679 }
680
681 return 0; /* everything is OK */
682 }
683
684 /*
685 * free buffers and private struct
686 */
687 static void ni65_free_buffer(struct priv *p)
688 {
689 int i;
690
691 if(!p)
692 return;
693
694 for(i=0;i<TMDNUM;i++) {
695 kfree(p->tmdbounce[i]);
696 #ifdef XMT_VIA_SKB
697 if(p->tmd_skb[i])
698 dev_kfree_skb(p->tmd_skb[i]);
699 #endif
700 }
701
702 for(i=0;i<RMDNUM;i++)
703 {
704 #ifdef RCV_VIA_SKB
705 if(p->recv_skb[i])
706 dev_kfree_skb(p->recv_skb[i]);
707 #else
708 kfree(p->recvbounce[i]);
709 #endif
710 }
711 kfree(p->self);
712 }
713
714
715 /*
716 * stop and (re)start lance .. e.g after an error
717 */
718 static void ni65_stop_start(struct net_device *dev,struct priv *p)
719 {
720 int csr0 = CSR0_INEA;
721
722 writedatareg(CSR0_STOP);
723
724 if(debuglevel > 1)
725 printk(KERN_DEBUG "ni65_stop_start\n");
726
727 if(p->features & INIT_RING_BEFORE_START) {
728 int i;
729 #ifdef XMT_VIA_SKB
730 struct sk_buff *skb_save[TMDNUM];
731 #endif
732 unsigned long buffer[TMDNUM];
733 short blen[TMDNUM];
734
735 if(p->xmit_queued) {
736 while(1) {
737 if((p->tmdhead[p->tmdlast].u.s.status & XMIT_OWN))
738 break;
739 p->tmdlast = (p->tmdlast + 1) & (TMDNUM-1);
740 if(p->tmdlast == p->tmdnum)
741 break;
742 }
743 }
744
745 for(i=0;i<TMDNUM;i++) {
746 struct tmd *tmdp = p->tmdhead + i;
747 #ifdef XMT_VIA_SKB
748 skb_save[i] = p->tmd_skb[i];
749 #endif
750 buffer[i] = (u32) isa_bus_to_virt(tmdp->u.buffer);
751 blen[i] = tmdp->blen;
752 tmdp->u.s.status = 0x0;
753 }
754
755 for(i=0;i<RMDNUM;i++) {
756 struct rmd *rmdp = p->rmdhead + i;
757 rmdp->u.s.status = RCV_OWN;
758 }
759 p->tmdnum = p->xmit_queued = 0;
760 writedatareg(CSR0_STRT | csr0);
761
762 for(i=0;i<TMDNUM;i++) {
763 int num = (i + p->tmdlast) & (TMDNUM-1);
764 p->tmdhead[i].u.buffer = (u32) isa_virt_to_bus((char *)buffer[num]); /* status is part of buffer field */
765 p->tmdhead[i].blen = blen[num];
766 if(p->tmdhead[i].u.s.status & XMIT_OWN) {
767 p->tmdnum = (p->tmdnum + 1) & (TMDNUM-1);
768 p->xmit_queued = 1;
769 writedatareg(CSR0_TDMD | CSR0_INEA | csr0);
770 }
771 #ifdef XMT_VIA_SKB
772 p->tmd_skb[i] = skb_save[num];
773 #endif
774 }
775 p->rmdnum = p->tmdlast = 0;
776 if(!p->lock)
777 if (p->tmdnum || !p->xmit_queued)
778 netif_wake_queue(dev);
779 dev->trans_start = jiffies;
780 }
781 else
782 writedatareg(CSR0_STRT | csr0);
783 }
784
785 /*
786 * init lance (write init-values .. init-buffers) (open-helper)
787 */
788 static int ni65_lance_reinit(struct net_device *dev)
789 {
790 int i;
791 struct priv *p = dev->ml_priv;
792 unsigned long flags;
793
794 p->lock = 0;
795 p->xmit_queued = 0;
796
797 flags=claim_dma_lock();
798 disable_dma(dev->dma); /* I've never worked with dma, but we do it like the packetdriver */
799 set_dma_mode(dev->dma,DMA_MODE_CASCADE);
800 enable_dma(dev->dma);
801 release_dma_lock(flags);
802
803 outw(inw(PORT+L_RESET),PORT+L_RESET); /* first: reset the card */
804 if( (i=readreg(CSR0) ) != 0x4)
805 {
806 printk(KERN_ERR "%s: can't RESET %s card: %04x\n",dev->name,
807 cards[p->cardno].cardname,(int) i);
808 flags=claim_dma_lock();
809 disable_dma(dev->dma);
810 release_dma_lock(flags);
811 return 0;
812 }
813
814 p->rmdnum = p->tmdnum = p->tmdlast = p->tmdbouncenum = 0;
815 for(i=0;i<TMDNUM;i++)
816 {
817 struct tmd *tmdp = p->tmdhead + i;
818 #ifdef XMT_VIA_SKB
819 if(p->tmd_skb[i]) {
820 dev_kfree_skb(p->tmd_skb[i]);
821 p->tmd_skb[i] = NULL;
822 }
823 #endif
824 tmdp->u.buffer = 0x0;
825 tmdp->u.s.status = XMIT_START | XMIT_END;
826 tmdp->blen = tmdp->status2 = 0;
827 }
828
829 for(i=0;i<RMDNUM;i++)
830 {
831 struct rmd *rmdp = p->rmdhead + i;
832 #ifdef RCV_VIA_SKB
833 rmdp->u.buffer = (u32) isa_virt_to_bus(p->recv_skb[i]->data);
834 #else
835 rmdp->u.buffer = (u32) isa_virt_to_bus(p->recvbounce[i]);
836 #endif
837 rmdp->blen = -(R_BUF_SIZE-8);
838 rmdp->mlen = 0;
839 rmdp->u.s.status = RCV_OWN;
840 }
841
842 if(dev->flags & IFF_PROMISC)
843 ni65_init_lance(p,dev->dev_addr,0x00,M_PROM);
844 else if(dev->mc_count || dev->flags & IFF_ALLMULTI)
845 ni65_init_lance(p,dev->dev_addr,0xff,0x0);
846 else
847 ni65_init_lance(p,dev->dev_addr,0x00,0x00);
848
849 /*
850 * ni65_set_lance_mem() sets L_ADDRREG to CSR0
851 * NOW, WE WILL NEVER CHANGE THE L_ADDRREG, CSR0 IS ALWAYS SELECTED
852 */
853
854 if(inw(PORT+L_DATAREG) & CSR0_IDON) {
855 ni65_set_performance(p);
856 /* init OK: start lance , enable interrupts */
857 writedatareg(CSR0_CLRALL | CSR0_INEA | CSR0_STRT);
858 return 1; /* ->OK */
859 }
860 printk(KERN_ERR "%s: can't init lance, status: %04x\n",dev->name,(int) inw(PORT+L_DATAREG));
861 flags=claim_dma_lock();
862 disable_dma(dev->dma);
863 release_dma_lock(flags);
864 return 0; /* ->Error */
865 }
866
867 /*
868 * interrupt handler
869 */
870 static irqreturn_t ni65_interrupt(int irq, void * dev_id)
871 {
872 int csr0 = 0;
873 struct net_device *dev = dev_id;
874 struct priv *p;
875 int bcnt = 32;
876
877 p = dev->ml_priv;
878
879 spin_lock(&p->ring_lock);
880
881 while(--bcnt) {
882 csr0 = inw(PORT+L_DATAREG);
883
884 #if 0
885 writedatareg( (csr0 & CSR0_CLRALL) ); /* ack interrupts, disable int. */
886 #else
887 writedatareg( (csr0 & CSR0_CLRALL) | CSR0_INEA ); /* ack interrupts, interrupts enabled */
888 #endif
889
890 if(!(csr0 & (CSR0_ERR | CSR0_RINT | CSR0_TINT)))
891 break;
892
893 if(csr0 & CSR0_RINT) /* RECV-int? */
894 ni65_recv_intr(dev,csr0);
895 if(csr0 & CSR0_TINT) /* XMIT-int? */
896 ni65_xmit_intr(dev,csr0);
897
898 if(csr0 & CSR0_ERR)
899 {
900 struct priv *p = dev->ml_priv;
901 if(debuglevel > 1)
902 printk(KERN_ERR "%s: general error: %04x.\n",dev->name,csr0);
903 if(csr0 & CSR0_BABL)
904 p->stats.tx_errors++;
905 if(csr0 & CSR0_MISS) {
906 int i;
907 for(i=0;i<RMDNUM;i++)
908 printk("%02x ",p->rmdhead[i].u.s.status);
909 printk("\n");
910 p->stats.rx_errors++;
911 }
912 if(csr0 & CSR0_MERR) {
913 if(debuglevel > 1)
914 printk(KERN_ERR "%s: Ooops .. memory error: %04x.\n",dev->name,csr0);
915 ni65_stop_start(dev,p);
916 }
917 }
918 }
919
920 #ifdef RCV_PARANOIA_CHECK
921 {
922 int j;
923 for(j=0;j<RMDNUM;j++)
924 {
925 struct priv *p = dev->ml_priv;
926 int i,k,num1,num2;
927 for(i=RMDNUM-1;i>0;i--) {
928 num2 = (p->rmdnum + i) & (RMDNUM-1);
929 if(!(p->rmdhead[num2].u.s.status & RCV_OWN))
930 break;
931 }
932
933 if(i) {
934 for(k=0;k<RMDNUM;k++) {
935 num1 = (p->rmdnum + k) & (RMDNUM-1);
936 if(!(p->rmdhead[num1].u.s.status & RCV_OWN))
937 break;
938 }
939 if(!k)
940 break;
941
942 if(debuglevel > 0)
943 {
944 char buf[256],*buf1;
945 int k;
946 buf1 = buf;
947 for(k=0;k<RMDNUM;k++) {
948 sprintf(buf1,"%02x ",(p->rmdhead[k].u.s.status)); /* & RCV_OWN) ); */
949 buf1 += 3;
950 }
951 *buf1 = 0;
952 printk(KERN_ERR "%s: Ooops, receive ring corrupted %2d %2d | %s\n",dev->name,p->rmdnum,i,buf);
953 }
954
955 p->rmdnum = num1;
956 ni65_recv_intr(dev,csr0);
957 if((p->rmdhead[num2].u.s.status & RCV_OWN))
958 break; /* ok, we are 'in sync' again */
959 }
960 else
961 break;
962 }
963 }
964 #endif
965
966 if( (csr0 & (CSR0_RXON | CSR0_TXON)) != (CSR0_RXON | CSR0_TXON) ) {
967 printk(KERN_DEBUG "%s: RX or TX was offline -> restart\n",dev->name);
968 ni65_stop_start(dev,p);
969 }
970 else
971 writedatareg(CSR0_INEA);
972
973 spin_unlock(&p->ring_lock);
974 return IRQ_HANDLED;
975 }
976
977 /*
978 * We have received an Xmit-Interrupt ..
979 * send a new packet if necessary
980 */
981 static void ni65_xmit_intr(struct net_device *dev,int csr0)
982 {
983 struct priv *p = dev->ml_priv;
984
985 while(p->xmit_queued)
986 {
987 struct tmd *tmdp = p->tmdhead + p->tmdlast;
988 int tmdstat = tmdp->u.s.status;
989
990 if(tmdstat & XMIT_OWN)
991 break;
992
993 if(tmdstat & XMIT_ERR)
994 {
995 #if 0
996 if(tmdp->status2 & XMIT_TDRMASK && debuglevel > 3)
997 printk(KERN_ERR "%s: tdr-problems (e.g. no resistor)\n",dev->name);
998 #endif
999 /* checking some errors */
1000 if(tmdp->status2 & XMIT_RTRY)
1001 p->stats.tx_aborted_errors++;
1002 if(tmdp->status2 & XMIT_LCAR)
1003 p->stats.tx_carrier_errors++;
1004 if(tmdp->status2 & (XMIT_BUFF | XMIT_UFLO )) {
1005 /* this stops the xmitter */
1006 p->stats.tx_fifo_errors++;
1007 if(debuglevel > 0)
1008 printk(KERN_ERR "%s: Xmit FIFO/BUFF error\n",dev->name);
1009 if(p->features & INIT_RING_BEFORE_START) {
1010 tmdp->u.s.status = XMIT_OWN | XMIT_START | XMIT_END; /* test: resend this frame */
1011 ni65_stop_start(dev,p);
1012 break; /* no more Xmit processing .. */
1013 }
1014 else
1015 ni65_stop_start(dev,p);
1016 }
1017 if(debuglevel > 2)
1018 printk(KERN_ERR "%s: xmit-error: %04x %02x-%04x\n",dev->name,csr0,(int) tmdstat,(int) tmdp->status2);
1019 if(!(csr0 & CSR0_BABL)) /* don't count errors twice */
1020 p->stats.tx_errors++;
1021 tmdp->status2 = 0;
1022 }
1023 else {
1024 p->stats.tx_bytes -= (short)(tmdp->blen);
1025 p->stats.tx_packets++;
1026 }
1027
1028 #ifdef XMT_VIA_SKB
1029 if(p->tmd_skb[p->tmdlast]) {
1030 dev_kfree_skb_irq(p->tmd_skb[p->tmdlast]);
1031 p->tmd_skb[p->tmdlast] = NULL;
1032 }
1033 #endif
1034
1035 p->tmdlast = (p->tmdlast + 1) & (TMDNUM-1);
1036 if(p->tmdlast == p->tmdnum)
1037 p->xmit_queued = 0;
1038 }
1039 netif_wake_queue(dev);
1040 }
1041
1042 /*
1043 * We have received a packet
1044 */
1045 static void ni65_recv_intr(struct net_device *dev,int csr0)
1046 {
1047 struct rmd *rmdp;
1048 int rmdstat,len;
1049 int cnt=0;
1050 struct priv *p = dev->ml_priv;
1051
1052 rmdp = p->rmdhead + p->rmdnum;
1053 while(!( (rmdstat = rmdp->u.s.status) & RCV_OWN))
1054 {
1055 cnt++;
1056 if( (rmdstat & (RCV_START | RCV_END | RCV_ERR)) != (RCV_START | RCV_END) ) /* error or oversized? */
1057 {
1058 if(!(rmdstat & RCV_ERR)) {
1059 if(rmdstat & RCV_START)
1060 {
1061 p->stats.rx_length_errors++;
1062 printk(KERN_ERR "%s: recv, packet too long: %d\n",dev->name,rmdp->mlen & 0x0fff);
1063 }
1064 }
1065 else {
1066 if(debuglevel > 2)
1067 printk(KERN_ERR "%s: receive-error: %04x, lance-status: %04x/%04x\n",
1068 dev->name,(int) rmdstat,csr0,(int) inw(PORT+L_DATAREG) );
1069 if(rmdstat & RCV_FRAM)
1070 p->stats.rx_frame_errors++;
1071 if(rmdstat & RCV_OFLO)
1072 p->stats.rx_over_errors++;
1073 if(rmdstat & RCV_CRC)
1074 p->stats.rx_crc_errors++;
1075 if(rmdstat & RCV_BUF_ERR)
1076 p->stats.rx_fifo_errors++;
1077 }
1078 if(!(csr0 & CSR0_MISS)) /* don't count errors twice */
1079 p->stats.rx_errors++;
1080 }
1081 else if( (len = (rmdp->mlen & 0x0fff) - 4) >= 60)
1082 {
1083 #ifdef RCV_VIA_SKB
1084 struct sk_buff *skb = alloc_skb(R_BUF_SIZE+2+16,GFP_ATOMIC);
1085 if (skb)
1086 skb_reserve(skb,16);
1087 #else
1088 struct sk_buff *skb = dev_alloc_skb(len+2);
1089 #endif
1090 if(skb)
1091 {
1092 skb_reserve(skb,2);
1093 #ifdef RCV_VIA_SKB
1094 if( (unsigned long) (skb->data + R_BUF_SIZE) > 0x1000000) {
1095 skb_put(skb,len);
1096 skb_copy_to_linear_data(skb, (unsigned char *)(p->recv_skb[p->rmdnum]->data),len);
1097 }
1098 else {
1099 struct sk_buff *skb1 = p->recv_skb[p->rmdnum];
1100 skb_put(skb,R_BUF_SIZE);
1101 p->recv_skb[p->rmdnum] = skb;
1102 rmdp->u.buffer = (u32) isa_virt_to_bus(skb->data);
1103 skb = skb1;
1104 skb_trim(skb,len);
1105 }
1106 #else
1107 skb_put(skb,len);
1108 skb_copy_to_linear_data(skb, (unsigned char *) p->recvbounce[p->rmdnum],len);
1109 #endif
1110 p->stats.rx_packets++;
1111 p->stats.rx_bytes += len;
1112 skb->protocol=eth_type_trans(skb,dev);
1113 netif_rx(skb);
1114 }
1115 else
1116 {
1117 printk(KERN_ERR "%s: can't alloc new sk_buff\n",dev->name);
1118 p->stats.rx_dropped++;
1119 }
1120 }
1121 else {
1122 printk(KERN_INFO "%s: received runt packet\n",dev->name);
1123 p->stats.rx_errors++;
1124 }
1125 rmdp->blen = -(R_BUF_SIZE-8);
1126 rmdp->mlen = 0;
1127 rmdp->u.s.status = RCV_OWN; /* change owner */
1128 p->rmdnum = (p->rmdnum + 1) & (RMDNUM-1);
1129 rmdp = p->rmdhead + p->rmdnum;
1130 }
1131 }
1132
1133 /*
1134 * kick xmitter ..
1135 */
1136
1137 static void ni65_timeout(struct net_device *dev)
1138 {
1139 int i;
1140 struct priv *p = dev->ml_priv;
1141
1142 printk(KERN_ERR "%s: xmitter timed out, try to restart!\n",dev->name);
1143 for(i=0;i<TMDNUM;i++)
1144 printk("%02x ",p->tmdhead[i].u.s.status);
1145 printk("\n");
1146 ni65_lance_reinit(dev);
1147 dev->trans_start = jiffies;
1148 netif_wake_queue(dev);
1149 }
1150
1151 /*
1152 * Send a packet
1153 */
1154
1155 static int ni65_send_packet(struct sk_buff *skb, struct net_device *dev)
1156 {
1157 struct priv *p = dev->ml_priv;
1158
1159 netif_stop_queue(dev);
1160
1161 if (test_and_set_bit(0, (void*)&p->lock)) {
1162 printk(KERN_ERR "%s: Queue was locked.\n", dev->name);
1163 return 1;
1164 }
1165
1166 {
1167 short len = ETH_ZLEN < skb->len ? skb->len : ETH_ZLEN;
1168 struct tmd *tmdp;
1169 unsigned long flags;
1170
1171 #ifdef XMT_VIA_SKB
1172 if( (unsigned long) (skb->data + skb->len) > 0x1000000) {
1173 #endif
1174
1175 skb_copy_from_linear_data(skb, p->tmdbounce[p->tmdbouncenum],
1176 skb->len > T_BUF_SIZE ? T_BUF_SIZE :
1177 skb->len);
1178 if (len > skb->len)
1179 memset((char *)p->tmdbounce[p->tmdbouncenum]+skb->len, 0, len-skb->len);
1180 dev_kfree_skb (skb);
1181
1182 spin_lock_irqsave(&p->ring_lock, flags);
1183 tmdp = p->tmdhead + p->tmdnum;
1184 tmdp->u.buffer = (u32) isa_virt_to_bus(p->tmdbounce[p->tmdbouncenum]);
1185 p->tmdbouncenum = (p->tmdbouncenum + 1) & (TMDNUM - 1);
1186
1187 #ifdef XMT_VIA_SKB
1188 }
1189 else {
1190 spin_lock_irqsave(&p->ring_lock, flags);
1191
1192 tmdp = p->tmdhead + p->tmdnum;
1193 tmdp->u.buffer = (u32) isa_virt_to_bus(skb->data);
1194 p->tmd_skb[p->tmdnum] = skb;
1195 }
1196 #endif
1197 tmdp->blen = -len;
1198
1199 tmdp->u.s.status = XMIT_OWN | XMIT_START | XMIT_END;
1200 writedatareg(CSR0_TDMD | CSR0_INEA); /* enable xmit & interrupt */
1201
1202 p->xmit_queued = 1;
1203 p->tmdnum = (p->tmdnum + 1) & (TMDNUM-1);
1204
1205 if(p->tmdnum != p->tmdlast)
1206 netif_wake_queue(dev);
1207
1208 p->lock = 0;
1209 dev->trans_start = jiffies;
1210
1211 spin_unlock_irqrestore(&p->ring_lock, flags);
1212 }
1213
1214 return 0;
1215 }
1216
1217 static struct net_device_stats *ni65_get_stats(struct net_device *dev)
1218 {
1219
1220 #if 0
1221 int i;
1222 struct priv *p = dev->ml_priv;
1223 for(i=0;i<RMDNUM;i++)
1224 {
1225 struct rmd *rmdp = p->rmdhead + ((p->rmdnum + i) & (RMDNUM-1));
1226 printk("%02x ",rmdp->u.s.status);
1227 }
1228 printk("\n");
1229 #endif
1230
1231 return &((struct priv *)dev->ml_priv)->stats;
1232 }
1233
1234 static void set_multicast_list(struct net_device *dev)
1235 {
1236 if(!ni65_lance_reinit(dev))
1237 printk(KERN_ERR "%s: Can't switch card into MC mode!\n",dev->name);
1238 netif_wake_queue(dev);
1239 }
1240
1241 #ifdef MODULE
1242 static struct net_device *dev_ni65;
1243
1244 module_param(irq, int, 0);
1245 module_param(io, int, 0);
1246 module_param(dma, int, 0);
1247 MODULE_PARM_DESC(irq, "ni6510 IRQ number (ignored for some cards)");
1248 MODULE_PARM_DESC(io, "ni6510 I/O base address");
1249 MODULE_PARM_DESC(dma, "ni6510 ISA DMA channel (ignored for some cards)");
1250
1251 int __init init_module(void)
1252 {
1253 dev_ni65 = ni65_probe(-1);
1254 return IS_ERR(dev_ni65) ? PTR_ERR(dev_ni65) : 0;
1255 }
1256
1257 void __exit cleanup_module(void)
1258 {
1259 unregister_netdev(dev_ni65);
1260 cleanup_card(dev_ni65);
1261 free_netdev(dev_ni65);
1262 }
1263 #endif /* MODULE */
1264
1265 MODULE_LICENSE("GPL");
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