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Merge rsync://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
[linux-2.6-block.git] / drivers / net / mac8390.c
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1da177e4
LT		 1/* mac8390.c: New driver for 8390-based Nubus (or Nubus-alike)
2 Ethernet cards on Linux */
3/* Based on the former daynaport.c driver, by Alan Cox. Some code
4 taken from or inspired by skeleton.c by Donald Becker, acenic.c by
5 Jes Sorensen, and ne2k-pci.c by Donald Becker and Paul Gortmaker.
6
7 This software may be used and distributed according to the terms of
8 the GNU Public License, incorporated herein by reference. */
9
10/* 2000-02-28: support added for Dayna and Kinetics cards by
11 A.G.deWijn@phys.uu.nl */
12/* 2000-04-04: support added for Dayna2 by bart@etpmod.phys.tue.nl */
13/* 2001-04-18: support for DaynaPort E/LC-M by rayk@knightsmanor.org */
14/* 2001-05-15: support for Cabletron ported from old daynaport driver
15 * and fixed access to Sonic Sys card which masquerades as a Farallon
16 * by rayk@knightsmanor.org */
17
1da177e4
LT		 18#include <linux/module.h>
19#include <linux/kernel.h>
20#include <linux/types.h>
21#include <linux/fcntl.h>
22#include <linux/interrupt.h>
23#include <linux/ptrace.h>
24#include <linux/ioport.h>
25#include <linux/nubus.h>
26#include <linux/in.h>
27#include <linux/slab.h>
28#include <linux/string.h>
29#include <linux/errno.h>
30#include <linux/init.h>
31#include <linux/netdevice.h>
32#include <linux/etherdevice.h>
33#include <linux/skbuff.h>
34#include <linux/bitops.h>
35
36#include <asm/system.h>
37#include <asm/io.h>
38#include <asm/dma.h>
39#include <asm/hwtest.h>
40#include <asm/macints.h>
41
42#include "8390.h"
43
44#define WD_START_PG 0x00 /* First page of TX buffer */
45#define CABLETRON_RX_START_PG 0x00 /* First page of RX buffer */
46#define CABLETRON_RX_STOP_PG 0x30 /* Last page +1 of RX ring */
47#define CABLETRON_TX_START_PG CABLETRON_RX_STOP_PG /* First page of TX buffer */
48
49/* Unfortunately it seems we have to hardcode these for the moment */
50/* Shouldn't the card know about this? Does anyone know where to read it off the card? Do we trust the data provided by the card? */
51
52#define DAYNA_8390_BASE 0x80000
53#define DAYNA_8390_MEM 0x00000
54
55#define KINETICS_8390_BASE 0x80000
56#define KINETICS_8390_MEM 0x00000
57
58#define CABLETRON_8390_BASE 0x90000
59#define CABLETRON_8390_MEM 0x00000
60
61enum mac8390_type {
62 MAC8390_NONE = -1,
63 MAC8390_APPLE,
64 MAC8390_ASANTE,
65 MAC8390_FARALLON, /* Apple, Asante, and Farallon are all compatible */
66 MAC8390_CABLETRON,
67 MAC8390_DAYNA,
68 MAC8390_INTERLAN,
69 MAC8390_KINETICS,
70 MAC8390_FOCUS,
71 MAC8390_SONICSYS,
72 MAC8390_DAYNA2,
73 MAC8390_DAYNA3,
74};
75
76static const char * cardname[] = {
77 "apple",
78 "asante",
79 "farallon",
80 "cabletron",
81 "dayna",
82 "interlan",
83 "kinetics",
84 "focus",
85 "sonic systems",
86 "dayna2",
87 "dayna_lc",
88};
89
90static int word16[] = {
91 1, /* apple */
92 1, /* asante */
93 1, /* farallon */
94 1, /* cabletron */
95 0, /* dayna */
96 1, /* interlan */
97 0, /* kinetics */
98 1, /* focus (??) */
99 1, /* sonic systems */
100 1, /* dayna2 */
101 1, /* dayna-lc */
102};
103
104/* on which cards do we use NuBus resources? */
105static int useresources[] = {
106 1, /* apple */
107 1, /* asante */
108 1, /* farallon */
109 0, /* cabletron */
110 0, /* dayna */
111 0, /* interlan */
112 0, /* kinetics */
113 0, /* focus (??) */
114 1, /* sonic systems */
115 1, /* dayna2 */
116 1, /* dayna-lc */
117};
118
119static char version[] __initdata =
120 "mac8390.c: v0.4 2001-05-15 David Huggins-Daines <dhd@debian.org> and others\n";
121
122extern enum mac8390_type mac8390_ident(struct nubus_dev * dev);
123extern int mac8390_memsize(unsigned long membase);
124extern int mac8390_memtest(struct net_device * dev);
125static int mac8390_initdev(struct net_device * dev, struct nubus_dev * ndev,
126 enum mac8390_type type);
127
128static int mac8390_open(struct net_device * dev);
129static int mac8390_close(struct net_device * dev);
130static void mac8390_no_reset(struct net_device *dev);
131
132/* Sane (32-bit chunk memory read/write) - Apple/Asante/Farallon do this*/
133static void sane_get_8390_hdr(struct net_device *dev,
134 struct e8390_pkt_hdr *hdr, int ring_page);
135static void sane_block_input(struct net_device * dev, int count,
136 struct sk_buff * skb, int ring_offset);
137static void sane_block_output(struct net_device * dev, int count,
138 const unsigned char * buf, const int start_page);
139
140/* dayna_memcpy to and from card */
141static void dayna_memcpy_fromcard(struct net_device *dev, void *to,
142 int from, int count);
143static void dayna_memcpy_tocard(struct net_device *dev, int to,
144 const void *from, int count);
145
146/* Dayna - Dayna/Kinetics use this */
147static void dayna_get_8390_hdr(struct net_device *dev,
148 struct e8390_pkt_hdr *hdr, int ring_page);
149static void dayna_block_input(struct net_device *dev, int count,
150 struct sk_buff *skb, int ring_offset);
151static void dayna_block_output(struct net_device *dev, int count,
152 const unsigned char *buf, int start_page);
153
154#define memcpy_fromio(a,b,c) memcpy((a),(void *)(b),(c))
155#define memcpy_toio(a,b,c) memcpy((void *)(a),(b),(c))
156
157/* Slow Sane (16-bit chunk memory read/write) Cabletron uses this */
158static void slow_sane_get_8390_hdr(struct net_device *dev,
159 struct e8390_pkt_hdr *hdr, int ring_page);
160static void slow_sane_block_input(struct net_device *dev, int count,
161 struct sk_buff *skb, int ring_offset);
162static void slow_sane_block_output(struct net_device *dev, int count,
163 const unsigned char *buf, int start_page);
164static void word_memcpy_tocard(void *tp, const void *fp, int count);
165static void word_memcpy_fromcard(void *tp, const void *fp, int count);
166
167enum mac8390_type __init mac8390_ident(struct nubus_dev * dev)
168{
169 if (dev->dr_sw == NUBUS_DRSW_ASANTE)
170 return MAC8390_ASANTE;
171 if (dev->dr_sw == NUBUS_DRSW_FARALLON)
172 return MAC8390_FARALLON;
173 if (dev->dr_sw == NUBUS_DRSW_KINETICS)
174 return MAC8390_KINETICS;
175 if (dev->dr_sw == NUBUS_DRSW_DAYNA)
176 return MAC8390_DAYNA;
177 if (dev->dr_sw == NUBUS_DRSW_DAYNA2)
178 return MAC8390_DAYNA2;
179 if (dev->dr_sw == NUBUS_DRSW_DAYNA_LC)
180 return MAC8390_DAYNA3;
181 if (dev->dr_hw == NUBUS_DRHW_CABLETRON)
182 return MAC8390_CABLETRON;
183 return MAC8390_NONE;
184}
185
186int __init mac8390_memsize(unsigned long membase)
187{
188 unsigned long flags;
189 int i, j;
190
191 local_irq_save(flags);
192 /* Check up to 32K in 4K increments */
193 for (i = 0; i < 8; i++) {
194 volatile unsigned short *m = (unsigned short *) (membase + (i * 0x1000));
195
196 /* Unwriteable - we have a fully decoded card and the
197 RAM end located */
198 if (hwreg_present(m) == 0)
199 break;
200
201 /* write a distinctive byte */
202 *m = 0xA5A0 | i;
203 /* check that we read back what we wrote */
204 if (*m != (0xA5A0 | i))
205 break;
206
207 /* check for partial decode and wrap */
208 for (j = 0; j < i; j++) {
209 volatile unsigned short *p = (unsigned short *) (membase + (j * 0x1000));
210 if (*p != (0xA5A0 | j))
211 break;
212 }
213 }
214 local_irq_restore(flags);
215 /* in any case, we stopped once we tried one block too many,
216 or once we reached 32K */
217 return i * 0x1000;
218}
219
220struct net_device * __init mac8390_probe(int unit)
221{
222 struct net_device *dev;
223 volatile unsigned short *i;
224 int version_disp = 0;
225 struct nubus_dev * ndev = NULL;
226 int err = -ENODEV;
227
228 struct nubus_dir dir;
229 struct nubus_dirent ent;
230 int offset;
231 static unsigned int slots;
232
233 enum mac8390_type cardtype;
234
235 /* probably should check for Nubus instead */
236
237 if (!MACH_IS_MAC)
238 return ERR_PTR(-ENODEV);
239
240 dev = alloc_ei_netdev();
241 if (!dev)
242 return ERR_PTR(-ENOMEM);
243
244 if (unit >= 0)
245 sprintf(dev->name, "eth%d", unit);
246
247 SET_MODULE_OWNER(dev);
248
249 while ((ndev = nubus_find_type(NUBUS_CAT_NETWORK, NUBUS_TYPE_ETHERNET, ndev))) {
250 /* Have we seen it already? */
251 if (slots & (1<<ndev->board->slot))
252 continue;
253 slots |= 1<<ndev->board->slot;
254
255 if ((cardtype = mac8390_ident(ndev)) == MAC8390_NONE)
256 continue;
257
258 if (version_disp == 0) {
259 version_disp = 1;
260 printk(version);
261 }
262
263 dev->irq = SLOT2IRQ(ndev->board->slot);
264 /* This is getting to be a habit */
265 dev->base_addr = ndev->board->slot_addr | ((ndev->board->slot&0xf) << 20);
266
267 /* Get some Nubus info - we will trust the card's idea
268 of where its memory and registers are. */
269
270 if (nubus_get_func_dir(ndev, &dir) == -1) {
271 printk(KERN_ERR "%s: Unable to get Nubus functional"
272 " directory for slot %X!\n",
273 dev->name, ndev->board->slot);
274 continue;
275 }
276
277 /* Get the MAC address */
278 if ((nubus_find_rsrc(&dir, NUBUS_RESID_MAC_ADDRESS, &ent)) == -1) {
279 printk(KERN_INFO "%s: Couldn't get MAC address!\n",
280 dev->name);
281 continue;
282 } else {
283 nubus_get_rsrc_mem(dev->dev_addr, &ent, 6);
284 /* Some Sonic Sys cards masquerade as Farallon */
285 if (cardtype == MAC8390_FARALLON &&
286 dev->dev_addr[0] == 0x0 &&
287 dev->dev_addr[1] == 0x40 &&
288 dev->dev_addr[2] == 0x10) {
289 /* This is really Sonic Sys card */
290 cardtype = MAC8390_SONICSYS;
291 }
292 }
293
294 if (useresources[cardtype] == 1) {
295 nubus_rewinddir(&dir);
296 if (nubus_find_rsrc(&dir, NUBUS_RESID_MINOR_BASEOS, &ent) == -1) {
297 printk(KERN_ERR "%s: Memory offset resource"
298 " for slot %X not found!\n",
299 dev->name, ndev->board->slot);
300 continue;
301 }
302 nubus_get_rsrc_mem(&offset, &ent, 4);
303 dev->mem_start = dev->base_addr + offset;
304 /* yes, this is how the Apple driver does it */
305 dev->base_addr = dev->mem_start + 0x10000;
306 nubus_rewinddir(&dir);
307 if (nubus_find_rsrc(&dir, NUBUS_RESID_MINOR_LENGTH, &ent) == -1) {
308 printk(KERN_INFO "%s: Memory length resource"
309 " for slot %X not found"
310 ", probing\n",
311 dev->name, ndev->board->slot);
312 offset = mac8390_memsize(dev->mem_start);
313 } else {
314 nubus_get_rsrc_mem(&offset, &ent, 4);
315 }
316 dev->mem_end = dev->mem_start + offset;
317 } else {
318 switch (cardtype) {
319 case MAC8390_KINETICS:
320 case MAC8390_DAYNA: /* it's the same */
321 dev->base_addr =
322 (int)(ndev->board->slot_addr +
323 DAYNA_8390_BASE);
324 dev->mem_start =
325 (int)(ndev->board->slot_addr +
326 DAYNA_8390_MEM);
327 dev->mem_end =
328 dev->mem_start +
329 mac8390_memsize(dev->mem_start);
330 break;
331 case MAC8390_CABLETRON:
332 dev->base_addr =
333 (int)(ndev->board->slot_addr +
334 CABLETRON_8390_BASE);
335 dev->mem_start =
336 (int)(ndev->board->slot_addr +
337 CABLETRON_8390_MEM);
338 /* The base address is unreadable if 0x00
339 * has been written to the command register
340 * Reset the chip by writing E8390_NODMA +
341 * E8390_PAGE0 + E8390_STOP just to be
342 * sure
343 */
344 i = (void *)dev->base_addr;
345 *i = 0x21;
346 dev->mem_end =
347 dev->mem_start +
348 mac8390_memsize(dev->mem_start);
349 break;
350
351 default:
352 printk(KERN_ERR "Card type %s is"
353 " unsupported, sorry\n",
354 cardname[cardtype]);
355 continue;
356 }
357 }
358
359 /* Do the nasty 8390 stuff */
360 if (!mac8390_initdev(dev, ndev, cardtype))
361 break;
362 }
363
364 if (!ndev)
365 goto out;
366 err = register_netdev(dev);
367 if (err)
368 goto out;
369 return dev;
370
371out:
372 free_netdev(dev);
373 return ERR_PTR(err);
374}
375
376#ifdef MODULE
377MODULE_AUTHOR("David Huggins-Daines <dhd@debian.org> and others");
378MODULE_DESCRIPTION("Macintosh NS8390-based Nubus Ethernet driver");
379MODULE_LICENSE("GPL");
380
381/* overkill, of course */
382static struct net_device *dev_mac8390[15];
383int init_module(void)
384{
385 int i;
386 for (i = 0; i < 15; i++) {
387 struct net_device *dev = mac8390_probe(-1);
388 if (IS_ERR(dev))
389 break;
390 dev_mac890[i] = dev;
391 }
392 if (!i) {
393 printk(KERN_NOTICE "mac8390.c: No useable cards found, driver NOT installed.\n");
394 return -ENODEV;
395 }
396 return 0;
397}
398
399void cleanup_module(void)
400{
401 int i;
402 for (i = 0; i < 15; i++) {
403 struct net_device *dev = dev_mac890[i];
404 if (dev) {
405 unregister_netdev(dev);
406 free_netdev(dev);
407 }
408 }
409}
410
411#endif /* MODULE */
412
413static int __init mac8390_initdev(struct net_device * dev, struct nubus_dev * ndev,
414 enum mac8390_type type)
415{
416 static u32 fwrd4_offsets[16]={
417 0, 4, 8, 12,
418 16, 20, 24, 28,
419 32, 36, 40, 44,
420 48, 52, 56, 60
421 };
422 static u32 back4_offsets[16]={
423 60, 56, 52, 48,
424 44, 40, 36, 32,
425 28, 24, 20, 16,
426 12, 8, 4, 0
427 };
428 static u32 fwrd2_offsets[16]={
429 0, 2, 4, 6,
430 8, 10, 12, 14,
431 16, 18, 20, 22,
432 24, 26, 28, 30
433 };
434
435 int access_bitmode;
436
437 /* Now fill in our stuff */
438 dev->open = &mac8390_open;
439 dev->stop = &mac8390_close;
440#ifdef CONFIG_NET_POLL_CONTROLLER
441 dev->poll_controller = ei_poll;
442#endif
443
444 /* GAR, ei_status is actually a macro even though it looks global */
445 ei_status.name = cardname[type];
446 ei_status.word16 = word16[type];
447
448 /* Cabletron's TX/RX buffers are backwards */
449 if (type == MAC8390_CABLETRON) {
450 ei_status.tx_start_page = CABLETRON_TX_START_PG;
451 ei_status.rx_start_page = CABLETRON_RX_START_PG;
452 ei_status.stop_page = CABLETRON_RX_STOP_PG;
453 ei_status.rmem_start = dev->mem_start;
454 ei_status.rmem_end = dev->mem_start + CABLETRON_RX_STOP_PG*256;
455 } else {
456 ei_status.tx_start_page = WD_START_PG;
457 ei_status.rx_start_page = WD_START_PG + TX_PAGES;
458 ei_status.stop_page = (dev->mem_end - dev->mem_start)/256;
459 ei_status.rmem_start = dev->mem_start + TX_PAGES*256;
460 ei_status.rmem_end = dev->mem_end;
461 }
462
463 /* Fill in model-specific information and functions */
464 switch(type) {
465 case MAC8390_SONICSYS:
466 /* 16 bit card, register map is reversed */
467 ei_status.reset_8390 = &mac8390_no_reset;
468 ei_status.block_input = &slow_sane_block_input;
469 ei_status.block_output = &slow_sane_block_output;
470 ei_status.get_8390_hdr = &slow_sane_get_8390_hdr;
471 ei_status.reg_offset = back4_offsets;
472 access_bitmode = 0;
473 break;
474 case MAC8390_FARALLON:
475 case MAC8390_APPLE:
476 case MAC8390_ASANTE:
477 case MAC8390_DAYNA2:
478 case MAC8390_DAYNA3:
479 /* 32 bit card, register map is reversed */
480 /* sane */
481 ei_status.reset_8390 = &mac8390_no_reset;
482 ei_status.block_input = &sane_block_input;
483 ei_status.block_output = &sane_block_output;
484 ei_status.get_8390_hdr = &sane_get_8390_hdr;
485 ei_status.reg_offset = back4_offsets;
486 access_bitmode = 1;
487 break;
488 case MAC8390_CABLETRON:
489 /* 16 bit card, register map is short forward */
490 ei_status.reset_8390 = &mac8390_no_reset;
491 ei_status.block_input = &slow_sane_block_input;
492 ei_status.block_output = &slow_sane_block_output;
493 ei_status.get_8390_hdr = &slow_sane_get_8390_hdr;
494 ei_status.reg_offset = fwrd2_offsets;
495 access_bitmode = 0;
496 break;
497 case MAC8390_DAYNA:
498 case MAC8390_KINETICS:
499 /* 16 bit memory */
500 /* dayna and similar */
501 ei_status.reset_8390 = &mac8390_no_reset;
502 ei_status.block_input = &dayna_block_input;
503 ei_status.block_output = &dayna_block_output;
504 ei_status.get_8390_hdr = &dayna_get_8390_hdr;
505 ei_status.reg_offset = fwrd4_offsets;
506 access_bitmode = 0;
507 break;
508 default:
509 printk(KERN_ERR "Card type %s is unsupported, sorry\n", cardname[type]);
510 return -ENODEV;
511 }
512
513 NS8390_init(dev, 0);
514
515 /* Good, done, now spit out some messages */
516 printk(KERN_INFO "%s: %s in slot %X (type %s)\n",
517 dev->name, ndev->board->name, ndev->board->slot, cardname[type]);
518 printk(KERN_INFO "MAC ");
519 {
520 int i;
521 for (i = 0; i < 6; i++) {
522 printk("%2.2x", dev->dev_addr[i]);
523 if (i < 5)
524 printk(":");
525 }
526 }
527 printk(" IRQ %d, shared memory at %#lx-%#lx, %d-bit access.\n",
528 dev->irq, dev->mem_start, dev->mem_end-1,
529 access_bitmode?32:16);
530 return 0;
531}
532
533static int mac8390_open(struct net_device *dev)
534{
535 ei_open(dev);
536 if (request_irq(dev->irq, ei_interrupt, 0, "8390 Ethernet", dev)) {
537 printk ("%s: unable to get IRQ %d.\n", dev->name, dev->irq);
538 return -EAGAIN;
539 }
540 return 0;
541}
542
543static int mac8390_close(struct net_device *dev)
544{
545 free_irq(dev->irq, dev);
546 ei_close(dev);
547 return 0;
548}
549
550static void mac8390_no_reset(struct net_device *dev)
551{
552 ei_status.txing = 0;
553 if (ei_debug > 1)
554 printk("reset not supported\n");
555 return;
556}
557
558/* dayna_memcpy_fromio/dayna_memcpy_toio */
559/* directly from daynaport.c by Alan Cox */
560static void dayna_memcpy_fromcard(struct net_device *dev, void *to, int from, int count)
561{
09cc07a5
AV		 562 volatile unsigned char *ptr;
563 unsigned char *target=to;
1da177e4 564 from<<=1; /* word, skip overhead */
09cc07a5 565 ptr=(unsigned char *)(dev->mem_start+from);
1da177e4
LT		 566 /* Leading byte? */
567 if (from&2) {
09cc07a5
AV		 568 *target++ = ptr[-1];
569 ptr += 2;
1da177e4
LT		 570 count--;
571 }
572 while(count>=2)
573 {
09cc07a5
AV		 574 *(unsigned short *)target = *(unsigned short volatile *)ptr;
575 ptr += 4; /* skip cruft */
576 target += 2;
1da177e4
LT		 577 count-=2;
578 }
579 /* Trailing byte? */
580 if(count)
09cc07a5 581 *target = *ptr;
1da177e4
LT		 582}
583
584static void dayna_memcpy_tocard(struct net_device *dev, int to, const void *from, int count)
585{
586 volatile unsigned short *ptr;
09cc07a5 587 const unsigned char *src=from;
1da177e4
LT		 588 to<<=1; /* word, skip overhead */
589 ptr=(unsigned short *)(dev->mem_start+to);
590 /* Leading byte? */
591 if (to&2) { /* avoid a byte write (stomps on other data) */
09cc07a5 592 ptr[-1] = (ptr[-1]&0xFF00)|*src++;
1da177e4
LT		 593 ptr++;
594 count--;
595 }
596 while(count>=2)
597 {
09cc07a5 598 *ptr++=*(unsigned short *)src; /* Copy and */
1da177e4 599 ptr++; /* skip cruft */
09cc07a5 600 src += 2;
1da177e4
LT		 601 count-=2;
602 }
603 /* Trailing byte? */
604 if(count)
605 {
1da177e4 606 /* card doesn't like byte writes */
09cc07a5 607 *ptr=(*ptr&0x00FF)|(*src << 8);
1da177e4
LT		 608 }
609}
610
611/* sane block input/output */
612static void sane_get_8390_hdr(struct net_device *dev,
613 struct e8390_pkt_hdr *hdr, int ring_page)
614{
615 unsigned long hdr_start = (ring_page - WD_START_PG)<<8;
616 memcpy_fromio((void *)hdr, (char *)dev->mem_start + hdr_start, 4);
617 /* Fix endianness */
618 hdr->count = swab16(hdr->count);
619}
620
621static void sane_block_input(struct net_device *dev, int count,
622 struct sk_buff *skb, int ring_offset)
623{
624 unsigned long xfer_base = ring_offset - (WD_START_PG<<8);
625 unsigned long xfer_start = xfer_base + dev->mem_start;
626
627 if (xfer_start + count > ei_status.rmem_end) {
628 /* We must wrap the input move. */
629 int semi_count = ei_status.rmem_end - xfer_start;
630 memcpy_fromio(skb->data, (char *)dev->mem_start + xfer_base, semi_count);
631 count -= semi_count;
632 memcpy_toio(skb->data + semi_count, (char *)ei_status.rmem_start, count);
633 } else {
634 memcpy_fromio(skb->data, (char *)dev->mem_start + xfer_base, count);
635 }
636}
637
638static void sane_block_output(struct net_device *dev, int count,
639 const unsigned char *buf, int start_page)
640{
641 long shmem = (start_page - WD_START_PG)<<8;
642
643 memcpy_toio((char *)dev->mem_start + shmem, buf, count);
644}
645
646/* dayna block input/output */
647static void dayna_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, int ring_page)
648{
649 unsigned long hdr_start = (ring_page - WD_START_PG)<<8;
650
651 dayna_memcpy_fromcard(dev, (void *)hdr, hdr_start, 4);
652 /* Fix endianness */
653 hdr->count=(hdr->count&0xFF)<<8|(hdr->count>>8);
654}
655
656static void dayna_block_input(struct net_device *dev, int count, struct sk_buff *skb, int ring_offset)
657{
658 unsigned long xfer_base = ring_offset - (WD_START_PG<<8);
659 unsigned long xfer_start = xfer_base+dev->mem_start;
660
661 /* Note the offset math is done in card memory space which is word
662 per long onto our space. */
663
664 if (xfer_start + count > ei_status.rmem_end)
665 {
666 /* We must wrap the input move. */
667 int semi_count = ei_status.rmem_end - xfer_start;
668 dayna_memcpy_fromcard(dev, skb->data, xfer_base, semi_count);
669 count -= semi_count;
670 dayna_memcpy_fromcard(dev, skb->data + semi_count,
671 ei_status.rmem_start - dev->mem_start,
672 count);
673 }
674 else
675 {
676 dayna_memcpy_fromcard(dev, skb->data, xfer_base, count);
677 }
678}
679
680static void dayna_block_output(struct net_device *dev, int count, const unsigned char *buf,
681 int start_page)
682{
683 long shmem = (start_page - WD_START_PG)<<8;
684
685 dayna_memcpy_tocard(dev, shmem, buf, count);
686}
687
688/* Cabletron block I/O */
689static void slow_sane_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr,
690 int ring_page)
691{
692 unsigned long hdr_start = (ring_page - WD_START_PG)<<8;
693 word_memcpy_fromcard((void *)hdr, (char *)dev->mem_start+hdr_start, 4);
694 /* Register endianism - fix here rather than 8390.c */
695 hdr->count = (hdr->count&0xFF)<<8|(hdr->count>>8);
696}
697
698static void slow_sane_block_input(struct net_device *dev, int count, struct sk_buff *skb,
699 int ring_offset)
700{
701 unsigned long xfer_base = ring_offset - (WD_START_PG<<8);
702 unsigned long xfer_start = xfer_base+dev->mem_start;
703
704 if (xfer_start + count > ei_status.rmem_end)
705 {
706 /* We must wrap the input move. */
707 int semi_count = ei_status.rmem_end - xfer_start;
708 word_memcpy_fromcard(skb->data, (char *)dev->mem_start +
709 xfer_base, semi_count);
710 count -= semi_count;
711 word_memcpy_fromcard(skb->data + semi_count,
712 (char *)ei_status.rmem_start, count);
713 }
714 else
715 {
716 word_memcpy_fromcard(skb->data, (char *)dev->mem_start +
717 xfer_base, count);
718 }
719}
720
721static void slow_sane_block_output(struct net_device *dev, int count, const unsigned char *buf,
722 int start_page)
723{
724 long shmem = (start_page - WD_START_PG)<<8;
725
726 word_memcpy_tocard((char *)dev->mem_start + shmem, buf, count);
727}
728
729static void word_memcpy_tocard(void *tp, const void *fp, int count)
730{
731 volatile unsigned short *to = tp;
732 const unsigned short *from = fp;
733
734 count++;
735 count/=2;
736
737 while(count--)
738 *to++=*from++;
739}
740
741static void word_memcpy_fromcard(void *tp, const void *fp, int count)
742{
743 unsigned short *to = tp;
744 const volatile unsigned short *from = fp;
745
746 count++;
747 count/=2;
748
749 while(count--)
750 *to++=*from++;
751}
752
753
Linux 6.x block layer and io_uring tree(s)