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Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
[mirror_ubuntu-artful-kernel.git] / drivers / net / 82596.c
1 /* 82596.c: A generic 82596 ethernet driver for linux. */
2 /*
3 Based on Apricot.c
4 Written 1994 by Mark Evans.
5 This driver is for the Apricot 82596 bus-master interface
6
7 Modularised 12/94 Mark Evans
8
9
10 Modified to support the 82596 ethernet chips on 680x0 VME boards.
11 by Richard Hirst <richard@sleepie.demon.co.uk>
12 Renamed to be 82596.c
13
14 980825: Changed to receive directly in to sk_buffs which are
15 allocated at open() time. Eliminates copy on incoming frames
16 (small ones are still copied). Shared data now held in a
17 non-cached page, so we can run on 68060 in copyback mode.
18
19 TBD:
20 * look at deferring rx frames rather than discarding (as per tulip)
21 * handle tx ring full as per tulip
22 * performace test to tune rx_copybreak
23
24 Most of my modifications relate to the braindead big-endian
25 implementation by Intel. When the i596 is operating in
26 'big-endian' mode, it thinks a 32 bit value of 0x12345678
27 should be stored as 0x56781234. This is a real pain, when
28 you have linked lists which are shared by the 680x0 and the
29 i596.
30
31 Driver skeleton
32 Written 1993 by Donald Becker.
33 Copyright 1993 United States Government as represented by the Director,
34 National Security Agency. This software may only be used and distributed
35 according to the terms of the GNU General Public License as modified by SRC,
36 incorporated herein by reference.
37
38 The author may be reached as becker@scyld.com, or C/O
39 Scyld Computing Corporation, 410 Severn Ave., Suite 210, Annapolis MD 21403
40
41 */
42
43 #include <linux/module.h>
44 #include <linux/kernel.h>
45 #include <linux/string.h>
46 #include <linux/errno.h>
47 #include <linux/ioport.h>
48 #include <linux/slab.h>
49 #include <linux/interrupt.h>
50 #include <linux/delay.h>
51 #include <linux/netdevice.h>
52 #include <linux/etherdevice.h>
53 #include <linux/skbuff.h>
54 #include <linux/init.h>
55 #include <linux/bitops.h>
56
57 #include <asm/io.h>
58 #include <asm/dma.h>
59 #include <asm/pgtable.h>
60
61 static char version[] __initdata =
62 "82596.c $Revision: 1.5 $\n";
63
64 #define DRV_NAME "82596"
65
66 /* DEBUG flags
67 */
68
69 #define DEB_INIT 0x0001
70 #define DEB_PROBE 0x0002
71 #define DEB_SERIOUS 0x0004
72 #define DEB_ERRORS 0x0008
73 #define DEB_MULTI 0x0010
74 #define DEB_TDR 0x0020
75 #define DEB_OPEN 0x0040
76 #define DEB_RESET 0x0080
77 #define DEB_ADDCMD 0x0100
78 #define DEB_STATUS 0x0200
79 #define DEB_STARTTX 0x0400
80 #define DEB_RXADDR 0x0800
81 #define DEB_TXADDR 0x1000
82 #define DEB_RXFRAME 0x2000
83 #define DEB_INTS 0x4000
84 #define DEB_STRUCT 0x8000
85 #define DEB_ANY 0xffff
86
87
88 #define DEB(x,y) if (i596_debug & (x)) y
89
90
91 #if defined(CONFIG_MVME16x_NET) || defined(CONFIG_MVME16x_NET_MODULE)
92 #define ENABLE_MVME16x_NET
93 #endif
94 #if defined(CONFIG_BVME6000_NET) || defined(CONFIG_BVME6000_NET_MODULE)
95 #define ENABLE_BVME6000_NET
96 #endif
97 #if defined(CONFIG_APRICOT) || defined(CONFIG_APRICOT_MODULE)
98 #define ENABLE_APRICOT
99 #endif
100
101 #ifdef ENABLE_MVME16x_NET
102 #include <asm/mvme16xhw.h>
103 #endif
104 #ifdef ENABLE_BVME6000_NET
105 #include <asm/bvme6000hw.h>
106 #endif
107
108 /*
109 * Define various macros for Channel Attention, word swapping etc., dependent
110 * on architecture. MVME and BVME are 680x0 based, otherwise it is Intel.
111 */
112
113 #ifdef __mc68000__
114 #define WSWAPrfd(x) ((struct i596_rfd *) (((u32)(x)<<16) | ((((u32)(x)))>>16)))
115 #define WSWAPrbd(x) ((struct i596_rbd *) (((u32)(x)<<16) | ((((u32)(x)))>>16)))
116 #define WSWAPiscp(x) ((struct i596_iscp *)(((u32)(x)<<16) | ((((u32)(x)))>>16)))
117 #define WSWAPscb(x) ((struct i596_scb *) (((u32)(x)<<16) | ((((u32)(x)))>>16)))
118 #define WSWAPcmd(x) ((struct i596_cmd *) (((u32)(x)<<16) | ((((u32)(x)))>>16)))
119 #define WSWAPtbd(x) ((struct i596_tbd *) (((u32)(x)<<16) | ((((u32)(x)))>>16)))
120 #define WSWAPchar(x) ((char *) (((u32)(x)<<16) | ((((u32)(x)))>>16)))
121 #define ISCP_BUSY 0x00010000
122 #define MACH_IS_APRICOT 0
123 #else
124 #define WSWAPrfd(x) ((struct i596_rfd *)(x))
125 #define WSWAPrbd(x) ((struct i596_rbd *)(x))
126 #define WSWAPiscp(x) ((struct i596_iscp *)(x))
127 #define WSWAPscb(x) ((struct i596_scb *)(x))
128 #define WSWAPcmd(x) ((struct i596_cmd *)(x))
129 #define WSWAPtbd(x) ((struct i596_tbd *)(x))
130 #define WSWAPchar(x) ((char *)(x))
131 #define ISCP_BUSY 0x0001
132 #define MACH_IS_APRICOT 1
133 #endif
134
135 /*
136 * The MPU_PORT command allows direct access to the 82596. With PORT access
137 * the following commands are available (p5-18). The 32-bit port command
138 * must be word-swapped with the most significant word written first.
139 * This only applies to VME boards.
140 */
141 #define PORT_RESET 0x00 /* reset 82596 */
142 #define PORT_SELFTEST 0x01 /* selftest */
143 #define PORT_ALTSCP 0x02 /* alternate SCB address */
144 #define PORT_ALTDUMP 0x03 /* Alternate DUMP address */
145
146 static int i596_debug = (DEB_SERIOUS|DEB_PROBE);
147
148 MODULE_AUTHOR("Richard Hirst");
149 MODULE_DESCRIPTION("i82596 driver");
150 MODULE_LICENSE("GPL");
151
152 module_param(i596_debug, int, 0);
153 MODULE_PARM_DESC(i596_debug, "i82596 debug mask");
154
155
156 /* Copy frames shorter than rx_copybreak, otherwise pass on up in
157 * a full sized sk_buff. Value of 100 stolen from tulip.c (!alpha).
158 */
159 static int rx_copybreak = 100;
160
161 #define PKT_BUF_SZ 1536
162 #define MAX_MC_CNT 64
163
164 #define I596_TOTAL_SIZE 17
165
166 #define I596_NULL ((void *)0xffffffff)
167
168 #define CMD_EOL 0x8000 /* The last command of the list, stop. */
169 #define CMD_SUSP 0x4000 /* Suspend after doing cmd. */
170 #define CMD_INTR 0x2000 /* Interrupt after doing cmd. */
171
172 #define CMD_FLEX 0x0008 /* Enable flexible memory model */
173
174 enum commands {
175 CmdNOp = 0, CmdSASetup = 1, CmdConfigure = 2, CmdMulticastList = 3,
176 CmdTx = 4, CmdTDR = 5, CmdDump = 6, CmdDiagnose = 7
177 };
178
179 #define STAT_C 0x8000 /* Set to 0 after execution */
180 #define STAT_B 0x4000 /* Command being executed */
181 #define STAT_OK 0x2000 /* Command executed ok */
182 #define STAT_A 0x1000 /* Command aborted */
183
184 #define CUC_START 0x0100
185 #define CUC_RESUME 0x0200
186 #define CUC_SUSPEND 0x0300
187 #define CUC_ABORT 0x0400
188 #define RX_START 0x0010
189 #define RX_RESUME 0x0020
190 #define RX_SUSPEND 0x0030
191 #define RX_ABORT 0x0040
192
193 #define TX_TIMEOUT 5
194
195
196 struct i596_reg {
197 unsigned short porthi;
198 unsigned short portlo;
199 unsigned long ca;
200 };
201
202 #define EOF 0x8000
203 #define SIZE_MASK 0x3fff
204
205 struct i596_tbd {
206 unsigned short size;
207 unsigned short pad;
208 struct i596_tbd *next;
209 char *data;
210 };
211
212 /* The command structure has two 'next' pointers; v_next is the address of
213 * the next command as seen by the CPU, b_next is the address of the next
214 * command as seen by the 82596. The b_next pointer, as used by the 82596
215 * always references the status field of the next command, rather than the
216 * v_next field, because the 82596 is unaware of v_next. It may seem more
217 * logical to put v_next at the end of the structure, but we cannot do that
218 * because the 82596 expects other fields to be there, depending on command
219 * type.
220 */
221
222 struct i596_cmd {
223 struct i596_cmd *v_next; /* Address from CPUs viewpoint */
224 unsigned short status;
225 unsigned short command;
226 struct i596_cmd *b_next; /* Address from i596 viewpoint */
227 };
228
229 struct tx_cmd {
230 struct i596_cmd cmd;
231 struct i596_tbd *tbd;
232 unsigned short size;
233 unsigned short pad;
234 struct sk_buff *skb; /* So we can free it after tx */
235 };
236
237 struct tdr_cmd {
238 struct i596_cmd cmd;
239 unsigned short status;
240 unsigned short pad;
241 };
242
243 struct mc_cmd {
244 struct i596_cmd cmd;
245 short mc_cnt;
246 char mc_addrs[MAX_MC_CNT*6];
247 };
248
249 struct sa_cmd {
250 struct i596_cmd cmd;
251 char eth_addr[8];
252 };
253
254 struct cf_cmd {
255 struct i596_cmd cmd;
256 char i596_config[16];
257 };
258
259 struct i596_rfd {
260 unsigned short stat;
261 unsigned short cmd;
262 struct i596_rfd *b_next; /* Address from i596 viewpoint */
263 struct i596_rbd *rbd;
264 unsigned short count;
265 unsigned short size;
266 struct i596_rfd *v_next; /* Address from CPUs viewpoint */
267 struct i596_rfd *v_prev;
268 };
269
270 struct i596_rbd {
271 unsigned short count;
272 unsigned short zero1;
273 struct i596_rbd *b_next;
274 unsigned char *b_data; /* Address from i596 viewpoint */
275 unsigned short size;
276 unsigned short zero2;
277 struct sk_buff *skb;
278 struct i596_rbd *v_next;
279 struct i596_rbd *b_addr; /* This rbd addr from i596 view */
280 unsigned char *v_data; /* Address from CPUs viewpoint */
281 };
282
283 #define TX_RING_SIZE 64
284 #define RX_RING_SIZE 16
285
286 struct i596_scb {
287 unsigned short status;
288 unsigned short command;
289 struct i596_cmd *cmd;
290 struct i596_rfd *rfd;
291 unsigned long crc_err;
292 unsigned long align_err;
293 unsigned long resource_err;
294 unsigned long over_err;
295 unsigned long rcvdt_err;
296 unsigned long short_err;
297 unsigned short t_on;
298 unsigned short t_off;
299 };
300
301 struct i596_iscp {
302 unsigned long stat;
303 struct i596_scb *scb;
304 };
305
306 struct i596_scp {
307 unsigned long sysbus;
308 unsigned long pad;
309 struct i596_iscp *iscp;
310 };
311
312 struct i596_private {
313 volatile struct i596_scp scp;
314 volatile struct i596_iscp iscp;
315 volatile struct i596_scb scb;
316 struct sa_cmd sa_cmd;
317 struct cf_cmd cf_cmd;
318 struct tdr_cmd tdr_cmd;
319 struct mc_cmd mc_cmd;
320 unsigned long stat;
321 int last_restart __attribute__((aligned(4)));
322 struct i596_rfd *rfd_head;
323 struct i596_rbd *rbd_head;
324 struct i596_cmd *cmd_tail;
325 struct i596_cmd *cmd_head;
326 int cmd_backlog;
327 unsigned long last_cmd;
328 struct net_device_stats stats;
329 struct i596_rfd rfds[RX_RING_SIZE];
330 struct i596_rbd rbds[RX_RING_SIZE];
331 struct tx_cmd tx_cmds[TX_RING_SIZE];
332 struct i596_tbd tbds[TX_RING_SIZE];
333 int next_tx_cmd;
334 spinlock_t lock;
335 };
336
337 static char init_setup[] =
338 {
339 0x8E, /* length, prefetch on */
340 0xC8, /* fifo to 8, monitor off */
341 #ifdef CONFIG_VME
342 0xc0, /* don't save bad frames */
343 #else
344 0x80, /* don't save bad frames */
345 #endif
346 0x2E, /* No source address insertion, 8 byte preamble */
347 0x00, /* priority and backoff defaults */
348 0x60, /* interframe spacing */
349 0x00, /* slot time LSB */
350 0xf2, /* slot time and retries */
351 0x00, /* promiscuous mode */
352 0x00, /* collision detect */
353 0x40, /* minimum frame length */
354 0xff,
355 0x00,
356 0x7f /* *multi IA */ };
357
358 static int i596_open(struct net_device *dev);
359 static int i596_start_xmit(struct sk_buff *skb, struct net_device *dev);
360 static irqreturn_t i596_interrupt(int irq, void *dev_id);
361 static int i596_close(struct net_device *dev);
362 static struct net_device_stats *i596_get_stats(struct net_device *dev);
363 static void i596_add_cmd(struct net_device *dev, struct i596_cmd *cmd);
364 static void i596_tx_timeout (struct net_device *dev);
365 static void print_eth(unsigned char *buf, char *str);
366 static void set_multicast_list(struct net_device *dev);
367
368 static int rx_ring_size = RX_RING_SIZE;
369 static int ticks_limit = 25;
370 static int max_cmd_backlog = TX_RING_SIZE-1;
371
372
373 static inline void CA(struct net_device *dev)
374 {
375 #ifdef ENABLE_MVME16x_NET
376 if (MACH_IS_MVME16x) {
377 ((struct i596_reg *) dev->base_addr)->ca = 1;
378 }
379 #endif
380 #ifdef ENABLE_BVME6000_NET
381 if (MACH_IS_BVME6000) {
382 volatile u32 i;
383
384 i = *(volatile u32 *) (dev->base_addr);
385 }
386 #endif
387 #ifdef ENABLE_APRICOT
388 if (MACH_IS_APRICOT) {
389 outw(0, (short) (dev->base_addr) + 4);
390 }
391 #endif
392 }
393
394
395 static inline void MPU_PORT(struct net_device *dev, int c, volatile void *x)
396 {
397 #ifdef ENABLE_MVME16x_NET
398 if (MACH_IS_MVME16x) {
399 struct i596_reg *p = (struct i596_reg *) (dev->base_addr);
400 p->porthi = ((c) | (u32) (x)) & 0xffff;
401 p->portlo = ((c) | (u32) (x)) >> 16;
402 }
403 #endif
404 #ifdef ENABLE_BVME6000_NET
405 if (MACH_IS_BVME6000) {
406 u32 v = (u32) (c) | (u32) (x);
407 v = ((u32) (v) << 16) | ((u32) (v) >> 16);
408 *(volatile u32 *) dev->base_addr = v;
409 udelay(1);
410 *(volatile u32 *) dev->base_addr = v;
411 }
412 #endif
413 }
414
415
416 static inline int wait_istat(struct net_device *dev, struct i596_private *lp, int delcnt, char *str)
417 {
418 while (--delcnt && lp->iscp.stat)
419 udelay(10);
420 if (!delcnt) {
421 printk(KERN_ERR "%s: %s, status %4.4x, cmd %4.4x.\n",
422 dev->name, str, lp->scb.status, lp->scb.command);
423 return -1;
424 }
425 else
426 return 0;
427 }
428
429
430 static inline int wait_cmd(struct net_device *dev, struct i596_private *lp, int delcnt, char *str)
431 {
432 while (--delcnt && lp->scb.command)
433 udelay(10);
434 if (!delcnt) {
435 printk(KERN_ERR "%s: %s, status %4.4x, cmd %4.4x.\n",
436 dev->name, str, lp->scb.status, lp->scb.command);
437 return -1;
438 }
439 else
440 return 0;
441 }
442
443
444 static inline int wait_cfg(struct net_device *dev, struct i596_cmd *cmd, int delcnt, char *str)
445 {
446 volatile struct i596_cmd *c = cmd;
447
448 while (--delcnt && c->command)
449 udelay(10);
450 if (!delcnt) {
451 printk(KERN_ERR "%s: %s.\n", dev->name, str);
452 return -1;
453 }
454 else
455 return 0;
456 }
457
458
459 static void i596_display_data(struct net_device *dev)
460 {
461 struct i596_private *lp = dev->priv;
462 struct i596_cmd *cmd;
463 struct i596_rfd *rfd;
464 struct i596_rbd *rbd;
465
466 printk(KERN_ERR "lp and scp at %p, .sysbus = %08lx, .iscp = %p\n",
467 &lp->scp, lp->scp.sysbus, lp->scp.iscp);
468 printk(KERN_ERR "iscp at %p, iscp.stat = %08lx, .scb = %p\n",
469 &lp->iscp, lp->iscp.stat, lp->iscp.scb);
470 printk(KERN_ERR "scb at %p, scb.status = %04x, .command = %04x,"
471 " .cmd = %p, .rfd = %p\n",
472 &lp->scb, lp->scb.status, lp->scb.command,
473 lp->scb.cmd, lp->scb.rfd);
474 printk(KERN_ERR " errors: crc %lx, align %lx, resource %lx,"
475 " over %lx, rcvdt %lx, short %lx\n",
476 lp->scb.crc_err, lp->scb.align_err, lp->scb.resource_err,
477 lp->scb.over_err, lp->scb.rcvdt_err, lp->scb.short_err);
478 cmd = lp->cmd_head;
479 while (cmd != I596_NULL) {
480 printk(KERN_ERR "cmd at %p, .status = %04x, .command = %04x, .b_next = %p\n",
481 cmd, cmd->status, cmd->command, cmd->b_next);
482 cmd = cmd->v_next;
483 }
484 rfd = lp->rfd_head;
485 printk(KERN_ERR "rfd_head = %p\n", rfd);
486 do {
487 printk(KERN_ERR " %p .stat %04x, .cmd %04x, b_next %p, rbd %p,"
488 " count %04x\n",
489 rfd, rfd->stat, rfd->cmd, rfd->b_next, rfd->rbd,
490 rfd->count);
491 rfd = rfd->v_next;
492 } while (rfd != lp->rfd_head);
493 rbd = lp->rbd_head;
494 printk(KERN_ERR "rbd_head = %p\n", rbd);
495 do {
496 printk(KERN_ERR " %p .count %04x, b_next %p, b_data %p, size %04x\n",
497 rbd, rbd->count, rbd->b_next, rbd->b_data, rbd->size);
498 rbd = rbd->v_next;
499 } while (rbd != lp->rbd_head);
500 }
501
502
503 #if defined(ENABLE_MVME16x_NET) || defined(ENABLE_BVME6000_NET)
504 static irqreturn_t i596_error(int irq, void *dev_id)
505 {
506 struct net_device *dev = dev_id;
507 #ifdef ENABLE_MVME16x_NET
508 if (MACH_IS_MVME16x) {
509 volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000;
510
511 pcc2[0x28] = 1;
512 pcc2[0x2b] = 0x1d;
513 }
514 #endif
515 #ifdef ENABLE_BVME6000_NET
516 if (MACH_IS_BVME6000) {
517 volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG;
518
519 *ethirq = 1;
520 *ethirq = 3;
521 }
522 #endif
523 printk(KERN_ERR "%s: Error interrupt\n", dev->name);
524 i596_display_data(dev);
525 return IRQ_HANDLED;
526 }
527 #endif
528
529 static inline void init_rx_bufs(struct net_device *dev)
530 {
531 struct i596_private *lp = dev->priv;
532 int i;
533 struct i596_rfd *rfd;
534 struct i596_rbd *rbd;
535
536 /* First build the Receive Buffer Descriptor List */
537
538 for (i = 0, rbd = lp->rbds; i < rx_ring_size; i++, rbd++) {
539 struct sk_buff *skb = dev_alloc_skb(PKT_BUF_SZ);
540
541 if (skb == NULL)
542 panic("82596: alloc_skb() failed");
543 skb->dev = dev;
544 rbd->v_next = rbd+1;
545 rbd->b_next = WSWAPrbd(virt_to_bus(rbd+1));
546 rbd->b_addr = WSWAPrbd(virt_to_bus(rbd));
547 rbd->skb = skb;
548 rbd->v_data = skb->data;
549 rbd->b_data = WSWAPchar(virt_to_bus(skb->data));
550 rbd->size = PKT_BUF_SZ;
551 #ifdef __mc68000__
552 cache_clear(virt_to_phys(skb->data), PKT_BUF_SZ);
553 #endif
554 }
555 lp->rbd_head = lp->rbds;
556 rbd = lp->rbds + rx_ring_size - 1;
557 rbd->v_next = lp->rbds;
558 rbd->b_next = WSWAPrbd(virt_to_bus(lp->rbds));
559
560 /* Now build the Receive Frame Descriptor List */
561
562 for (i = 0, rfd = lp->rfds; i < rx_ring_size; i++, rfd++) {
563 rfd->rbd = I596_NULL;
564 rfd->v_next = rfd+1;
565 rfd->v_prev = rfd-1;
566 rfd->b_next = WSWAPrfd(virt_to_bus(rfd+1));
567 rfd->cmd = CMD_FLEX;
568 }
569 lp->rfd_head = lp->rfds;
570 lp->scb.rfd = WSWAPrfd(virt_to_bus(lp->rfds));
571 rfd = lp->rfds;
572 rfd->rbd = lp->rbd_head;
573 rfd->v_prev = lp->rfds + rx_ring_size - 1;
574 rfd = lp->rfds + rx_ring_size - 1;
575 rfd->v_next = lp->rfds;
576 rfd->b_next = WSWAPrfd(virt_to_bus(lp->rfds));
577 rfd->cmd = CMD_EOL|CMD_FLEX;
578 }
579
580 static inline void remove_rx_bufs(struct net_device *dev)
581 {
582 struct i596_private *lp = dev->priv;
583 struct i596_rbd *rbd;
584 int i;
585
586 for (i = 0, rbd = lp->rbds; i < rx_ring_size; i++, rbd++) {
587 if (rbd->skb == NULL)
588 break;
589 dev_kfree_skb(rbd->skb);
590 }
591 }
592
593
594 static void rebuild_rx_bufs(struct net_device *dev)
595 {
596 struct i596_private *lp = dev->priv;
597 int i;
598
599 /* Ensure rx frame/buffer descriptors are tidy */
600
601 for (i = 0; i < rx_ring_size; i++) {
602 lp->rfds[i].rbd = I596_NULL;
603 lp->rfds[i].cmd = CMD_FLEX;
604 }
605 lp->rfds[rx_ring_size-1].cmd = CMD_EOL|CMD_FLEX;
606 lp->rfd_head = lp->rfds;
607 lp->scb.rfd = WSWAPrfd(virt_to_bus(lp->rfds));
608 lp->rbd_head = lp->rbds;
609 lp->rfds[0].rbd = WSWAPrbd(virt_to_bus(lp->rbds));
610 }
611
612
613 static int init_i596_mem(struct net_device *dev)
614 {
615 struct i596_private *lp = dev->priv;
616 #if !defined(ENABLE_MVME16x_NET) && !defined(ENABLE_BVME6000_NET) || defined(ENABLE_APRICOT)
617 short ioaddr = dev->base_addr;
618 #endif
619 unsigned long flags;
620
621 MPU_PORT(dev, PORT_RESET, NULL);
622
623 udelay(100); /* Wait 100us - seems to help */
624
625 #if defined(ENABLE_MVME16x_NET) || defined(ENABLE_BVME6000_NET)
626 #ifdef ENABLE_MVME16x_NET
627 if (MACH_IS_MVME16x) {
628 volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000;
629
630 /* Disable all ints for now */
631 pcc2[0x28] = 1;
632 pcc2[0x2a] = 0x48;
633 /* Following disables snooping. Snooping is not required
634 * as we make appropriate use of non-cached pages for
635 * shared data, and cache_push/cache_clear.
636 */
637 pcc2[0x2b] = 0x08;
638 }
639 #endif
640 #ifdef ENABLE_BVME6000_NET
641 if (MACH_IS_BVME6000) {
642 volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG;
643
644 *ethirq = 1;
645 }
646 #endif
647
648 /* change the scp address */
649
650 MPU_PORT(dev, PORT_ALTSCP, (void *)virt_to_bus((void *)&lp->scp));
651
652 #elif defined(ENABLE_APRICOT)
653
654 {
655 u32 scp = virt_to_bus(&lp->scp);
656
657 /* change the scp address */
658 outw(0, ioaddr);
659 outw(0, ioaddr);
660 outb(4, ioaddr + 0xf);
661 outw(scp | 2, ioaddr);
662 outw(scp >> 16, ioaddr);
663 }
664 #endif
665
666 lp->last_cmd = jiffies;
667
668 #ifdef ENABLE_MVME16x_NET
669 if (MACH_IS_MVME16x)
670 lp->scp.sysbus = 0x00000054;
671 #endif
672 #ifdef ENABLE_BVME6000_NET
673 if (MACH_IS_BVME6000)
674 lp->scp.sysbus = 0x0000004c;
675 #endif
676 #ifdef ENABLE_APRICOT
677 if (MACH_IS_APRICOT)
678 lp->scp.sysbus = 0x00440000;
679 #endif
680
681 lp->scp.iscp = WSWAPiscp(virt_to_bus((void *)&lp->iscp));
682 lp->iscp.scb = WSWAPscb(virt_to_bus((void *)&lp->scb));
683 lp->iscp.stat = ISCP_BUSY;
684 lp->cmd_backlog = 0;
685
686 lp->cmd_head = lp->scb.cmd = I596_NULL;
687
688 #ifdef ENABLE_BVME6000_NET
689 if (MACH_IS_BVME6000) {
690 lp->scb.t_on = 7 * 25;
691 lp->scb.t_off = 1 * 25;
692 }
693 #endif
694
695 DEB(DEB_INIT,printk(KERN_DEBUG "%s: starting i82596.\n", dev->name));
696
697 #if defined(ENABLE_APRICOT)
698 (void) inb(ioaddr + 0x10);
699 outb(4, ioaddr + 0xf);
700 #endif
701 CA(dev);
702
703 if (wait_istat(dev,lp,1000,"initialization timed out"))
704 goto failed;
705 DEB(DEB_INIT,printk(KERN_DEBUG "%s: i82596 initialization successful\n", dev->name));
706
707 /* Ensure rx frame/buffer descriptors are tidy */
708 rebuild_rx_bufs(dev);
709 lp->scb.command = 0;
710
711 #ifdef ENABLE_MVME16x_NET
712 if (MACH_IS_MVME16x) {
713 volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000;
714
715 /* Enable ints, etc. now */
716 pcc2[0x2a] = 0x55; /* Edge sensitive */
717 pcc2[0x2b] = 0x15;
718 }
719 #endif
720 #ifdef ENABLE_BVME6000_NET
721 if (MACH_IS_BVME6000) {
722 volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG;
723
724 *ethirq = 3;
725 }
726 #endif
727
728
729 DEB(DEB_INIT,printk(KERN_DEBUG "%s: queuing CmdConfigure\n", dev->name));
730 memcpy(lp->cf_cmd.i596_config, init_setup, 14);
731 lp->cf_cmd.cmd.command = CmdConfigure;
732 i596_add_cmd(dev, &lp->cf_cmd.cmd);
733
734 DEB(DEB_INIT,printk(KERN_DEBUG "%s: queuing CmdSASetup\n", dev->name));
735 memcpy(lp->sa_cmd.eth_addr, dev->dev_addr, 6);
736 lp->sa_cmd.cmd.command = CmdSASetup;
737 i596_add_cmd(dev, &lp->sa_cmd.cmd);
738
739 DEB(DEB_INIT,printk(KERN_DEBUG "%s: queuing CmdTDR\n", dev->name));
740 lp->tdr_cmd.cmd.command = CmdTDR;
741 i596_add_cmd(dev, &lp->tdr_cmd.cmd);
742
743 spin_lock_irqsave (&lp->lock, flags);
744
745 if (wait_cmd(dev,lp,1000,"timed out waiting to issue RX_START")) {
746 spin_unlock_irqrestore (&lp->lock, flags);
747 goto failed;
748 }
749 DEB(DEB_INIT,printk(KERN_DEBUG "%s: Issuing RX_START\n", dev->name));
750 lp->scb.command = RX_START;
751 CA(dev);
752
753 spin_unlock_irqrestore (&lp->lock, flags);
754
755 if (wait_cmd(dev,lp,1000,"RX_START not processed"))
756 goto failed;
757 DEB(DEB_INIT,printk(KERN_DEBUG "%s: Receive unit started OK\n", dev->name));
758 return 0;
759
760 failed:
761 printk(KERN_CRIT "%s: Failed to initialise 82596\n", dev->name);
762 MPU_PORT(dev, PORT_RESET, NULL);
763 return -1;
764 }
765
766 static inline int i596_rx(struct net_device *dev)
767 {
768 struct i596_private *lp = dev->priv;
769 struct i596_rfd *rfd;
770 struct i596_rbd *rbd;
771 int frames = 0;
772
773 DEB(DEB_RXFRAME,printk(KERN_DEBUG "i596_rx(), rfd_head %p, rbd_head %p\n",
774 lp->rfd_head, lp->rbd_head));
775
776 rfd = lp->rfd_head; /* Ref next frame to check */
777
778 while ((rfd->stat) & STAT_C) { /* Loop while complete frames */
779 if (rfd->rbd == I596_NULL)
780 rbd = I596_NULL;
781 else if (rfd->rbd == lp->rbd_head->b_addr)
782 rbd = lp->rbd_head;
783 else {
784 printk(KERN_CRIT "%s: rbd chain broken!\n", dev->name);
785 /* XXX Now what? */
786 rbd = I596_NULL;
787 }
788 DEB(DEB_RXFRAME, printk(KERN_DEBUG " rfd %p, rfd.rbd %p, rfd.stat %04x\n",
789 rfd, rfd->rbd, rfd->stat));
790
791 if (rbd != I596_NULL && ((rfd->stat) & STAT_OK)) {
792 /* a good frame */
793 int pkt_len = rbd->count & 0x3fff;
794 struct sk_buff *skb = rbd->skb;
795 int rx_in_place = 0;
796
797 DEB(DEB_RXADDR,print_eth(rbd->v_data, "received"));
798 frames++;
799
800 /* Check if the packet is long enough to just accept
801 * without copying to a properly sized skbuff.
802 */
803
804 if (pkt_len > rx_copybreak) {
805 struct sk_buff *newskb;
806
807 /* Get fresh skbuff to replace filled one. */
808 newskb = dev_alloc_skb(PKT_BUF_SZ);
809 if (newskb == NULL) {
810 skb = NULL; /* drop pkt */
811 goto memory_squeeze;
812 }
813 /* Pass up the skb already on the Rx ring. */
814 skb_put(skb, pkt_len);
815 rx_in_place = 1;
816 rbd->skb = newskb;
817 newskb->dev = dev;
818 rbd->v_data = newskb->data;
819 rbd->b_data = WSWAPchar(virt_to_bus(newskb->data));
820 #ifdef __mc68000__
821 cache_clear(virt_to_phys(newskb->data), PKT_BUF_SZ);
822 #endif
823 }
824 else
825 skb = dev_alloc_skb(pkt_len + 2);
826 memory_squeeze:
827 if (skb == NULL) {
828 /* XXX tulip.c can defer packets here!! */
829 printk(KERN_WARNING "%s: i596_rx Memory squeeze, dropping packet.\n", dev->name);
830 lp->stats.rx_dropped++;
831 }
832 else {
833 if (!rx_in_place) {
834 /* 16 byte align the data fields */
835 skb_reserve(skb, 2);
836 memcpy(skb_put(skb,pkt_len), rbd->v_data, pkt_len);
837 }
838 skb->protocol=eth_type_trans(skb,dev);
839 skb->len = pkt_len;
840 #ifdef __mc68000__
841 cache_clear(virt_to_phys(rbd->skb->data),
842 pkt_len);
843 #endif
844 netif_rx(skb);
845 dev->last_rx = jiffies;
846 lp->stats.rx_packets++;
847 lp->stats.rx_bytes+=pkt_len;
848 }
849 }
850 else {
851 DEB(DEB_ERRORS, printk(KERN_DEBUG "%s: Error, rfd.stat = 0x%04x\n",
852 dev->name, rfd->stat));
853 lp->stats.rx_errors++;
854 if ((rfd->stat) & 0x0001)
855 lp->stats.collisions++;
856 if ((rfd->stat) & 0x0080)
857 lp->stats.rx_length_errors++;
858 if ((rfd->stat) & 0x0100)
859 lp->stats.rx_over_errors++;
860 if ((rfd->stat) & 0x0200)
861 lp->stats.rx_fifo_errors++;
862 if ((rfd->stat) & 0x0400)
863 lp->stats.rx_frame_errors++;
864 if ((rfd->stat) & 0x0800)
865 lp->stats.rx_crc_errors++;
866 if ((rfd->stat) & 0x1000)
867 lp->stats.rx_length_errors++;
868 }
869
870 /* Clear the buffer descriptor count and EOF + F flags */
871
872 if (rbd != I596_NULL && (rbd->count & 0x4000)) {
873 rbd->count = 0;
874 lp->rbd_head = rbd->v_next;
875 }
876
877 /* Tidy the frame descriptor, marking it as end of list */
878
879 rfd->rbd = I596_NULL;
880 rfd->stat = 0;
881 rfd->cmd = CMD_EOL|CMD_FLEX;
882 rfd->count = 0;
883
884 /* Remove end-of-list from old end descriptor */
885
886 rfd->v_prev->cmd = CMD_FLEX;
887
888 /* Update record of next frame descriptor to process */
889
890 lp->scb.rfd = rfd->b_next;
891 lp->rfd_head = rfd->v_next;
892 rfd = lp->rfd_head;
893 }
894
895 DEB(DEB_RXFRAME,printk(KERN_DEBUG "frames %d\n", frames));
896
897 return 0;
898 }
899
900
901 static void i596_cleanup_cmd(struct net_device *dev, struct i596_private *lp)
902 {
903 struct i596_cmd *ptr;
904
905 while (lp->cmd_head != I596_NULL) {
906 ptr = lp->cmd_head;
907 lp->cmd_head = ptr->v_next;
908 lp->cmd_backlog--;
909
910 switch ((ptr->command) & 0x7) {
911 case CmdTx:
912 {
913 struct tx_cmd *tx_cmd = (struct tx_cmd *) ptr;
914 struct sk_buff *skb = tx_cmd->skb;
915
916 dev_kfree_skb(skb);
917
918 lp->stats.tx_errors++;
919 lp->stats.tx_aborted_errors++;
920
921 ptr->v_next = ptr->b_next = I596_NULL;
922 tx_cmd->cmd.command = 0; /* Mark as free */
923 break;
924 }
925 default:
926 ptr->v_next = ptr->b_next = I596_NULL;
927 }
928 }
929
930 wait_cmd(dev,lp,100,"i596_cleanup_cmd timed out");
931 lp->scb.cmd = I596_NULL;
932 }
933
934 static void i596_reset(struct net_device *dev, struct i596_private *lp,
935 int ioaddr)
936 {
937 unsigned long flags;
938
939 DEB(DEB_RESET,printk(KERN_DEBUG "i596_reset\n"));
940
941 spin_lock_irqsave (&lp->lock, flags);
942
943 wait_cmd(dev,lp,100,"i596_reset timed out");
944
945 netif_stop_queue(dev);
946
947 lp->scb.command = CUC_ABORT | RX_ABORT;
948 CA(dev);
949
950 /* wait for shutdown */
951 wait_cmd(dev,lp,1000,"i596_reset 2 timed out");
952 spin_unlock_irqrestore (&lp->lock, flags);
953
954 i596_cleanup_cmd(dev,lp);
955 i596_rx(dev);
956
957 netif_start_queue(dev);
958 init_i596_mem(dev);
959 }
960
961 static void i596_add_cmd(struct net_device *dev, struct i596_cmd *cmd)
962 {
963 struct i596_private *lp = dev->priv;
964 int ioaddr = dev->base_addr;
965 unsigned long flags;
966
967 DEB(DEB_ADDCMD,printk(KERN_DEBUG "i596_add_cmd\n"));
968
969 cmd->status = 0;
970 cmd->command |= (CMD_EOL | CMD_INTR);
971 cmd->v_next = cmd->b_next = I596_NULL;
972
973 spin_lock_irqsave (&lp->lock, flags);
974
975 if (lp->cmd_head != I596_NULL) {
976 lp->cmd_tail->v_next = cmd;
977 lp->cmd_tail->b_next = WSWAPcmd(virt_to_bus(&cmd->status));
978 } else {
979 lp->cmd_head = cmd;
980 wait_cmd(dev,lp,100,"i596_add_cmd timed out");
981 lp->scb.cmd = WSWAPcmd(virt_to_bus(&cmd->status));
982 lp->scb.command = CUC_START;
983 CA(dev);
984 }
985 lp->cmd_tail = cmd;
986 lp->cmd_backlog++;
987
988 spin_unlock_irqrestore (&lp->lock, flags);
989
990 if (lp->cmd_backlog > max_cmd_backlog) {
991 unsigned long tickssofar = jiffies - lp->last_cmd;
992
993 if (tickssofar < ticks_limit)
994 return;
995
996 printk(KERN_NOTICE "%s: command unit timed out, status resetting.\n", dev->name);
997
998 i596_reset(dev, lp, ioaddr);
999 }
1000 }
1001
1002 static int i596_open(struct net_device *dev)
1003 {
1004 int res = 0;
1005
1006 DEB(DEB_OPEN,printk(KERN_DEBUG "%s: i596_open() irq %d.\n", dev->name, dev->irq));
1007
1008 if (request_irq(dev->irq, i596_interrupt, 0, "i82596", dev)) {
1009 printk(KERN_ERR "%s: IRQ %d not free\n", dev->name, dev->irq);
1010 return -EAGAIN;
1011 }
1012 #ifdef ENABLE_MVME16x_NET
1013 if (MACH_IS_MVME16x) {
1014 if (request_irq(0x56, i596_error, 0, "i82596_error", dev))
1015 return -EAGAIN;
1016 }
1017 #endif
1018 init_rx_bufs(dev);
1019
1020 netif_start_queue(dev);
1021
1022 /* Initialize the 82596 memory */
1023 if (init_i596_mem(dev)) {
1024 res = -EAGAIN;
1025 free_irq(dev->irq, dev);
1026 }
1027
1028 return res;
1029 }
1030
1031 static void i596_tx_timeout (struct net_device *dev)
1032 {
1033 struct i596_private *lp = dev->priv;
1034 int ioaddr = dev->base_addr;
1035
1036 /* Transmitter timeout, serious problems. */
1037 DEB(DEB_ERRORS,printk(KERN_ERR "%s: transmit timed out, status resetting.\n",
1038 dev->name));
1039
1040 lp->stats.tx_errors++;
1041
1042 /* Try to restart the adaptor */
1043 if (lp->last_restart == lp->stats.tx_packets) {
1044 DEB(DEB_ERRORS,printk(KERN_ERR "Resetting board.\n"));
1045 /* Shutdown and restart */
1046 i596_reset (dev, lp, ioaddr);
1047 } else {
1048 /* Issue a channel attention signal */
1049 DEB(DEB_ERRORS,printk(KERN_ERR "Kicking board.\n"));
1050 lp->scb.command = CUC_START | RX_START;
1051 CA (dev);
1052 lp->last_restart = lp->stats.tx_packets;
1053 }
1054
1055 dev->trans_start = jiffies;
1056 netif_wake_queue (dev);
1057 }
1058
1059
1060 static int i596_start_xmit(struct sk_buff *skb, struct net_device *dev)
1061 {
1062 struct i596_private *lp = dev->priv;
1063 struct tx_cmd *tx_cmd;
1064 struct i596_tbd *tbd;
1065 short length = skb->len;
1066 dev->trans_start = jiffies;
1067
1068 DEB(DEB_STARTTX,printk(KERN_DEBUG "%s: i596_start_xmit(%x,%p) called\n",
1069 dev->name, skb->len, skb->data));
1070
1071 if (skb->len < ETH_ZLEN) {
1072 if (skb_padto(skb, ETH_ZLEN))
1073 return 0;
1074 length = ETH_ZLEN;
1075 }
1076 netif_stop_queue(dev);
1077
1078 tx_cmd = lp->tx_cmds + lp->next_tx_cmd;
1079 tbd = lp->tbds + lp->next_tx_cmd;
1080
1081 if (tx_cmd->cmd.command) {
1082 printk(KERN_NOTICE "%s: xmit ring full, dropping packet.\n",
1083 dev->name);
1084 lp->stats.tx_dropped++;
1085
1086 dev_kfree_skb(skb);
1087 } else {
1088 if (++lp->next_tx_cmd == TX_RING_SIZE)
1089 lp->next_tx_cmd = 0;
1090 tx_cmd->tbd = WSWAPtbd(virt_to_bus(tbd));
1091 tbd->next = I596_NULL;
1092
1093 tx_cmd->cmd.command = CMD_FLEX | CmdTx;
1094 tx_cmd->skb = skb;
1095
1096 tx_cmd->pad = 0;
1097 tx_cmd->size = 0;
1098 tbd->pad = 0;
1099 tbd->size = EOF | length;
1100
1101 tbd->data = WSWAPchar(virt_to_bus(skb->data));
1102
1103 #ifdef __mc68000__
1104 cache_push(virt_to_phys(skb->data), length);
1105 #endif
1106 DEB(DEB_TXADDR,print_eth(skb->data, "tx-queued"));
1107 i596_add_cmd(dev, &tx_cmd->cmd);
1108
1109 lp->stats.tx_packets++;
1110 lp->stats.tx_bytes += length;
1111 }
1112
1113 netif_start_queue(dev);
1114
1115 return 0;
1116 }
1117
1118 static void print_eth(unsigned char *add, char *str)
1119 {
1120 int i;
1121
1122 printk(KERN_DEBUG "i596 0x%p, ", add);
1123 for (i = 0; i < 6; i++)
1124 printk(" %02X", add[i + 6]);
1125 printk(" -->");
1126 for (i = 0; i < 6; i++)
1127 printk(" %02X", add[i]);
1128 printk(" %02X%02X, %s\n", add[12], add[13], str);
1129 }
1130
1131 static int io = 0x300;
1132 static int irq = 10;
1133
1134 struct net_device * __init i82596_probe(int unit)
1135 {
1136 struct net_device *dev;
1137 int i;
1138 struct i596_private *lp;
1139 char eth_addr[8];
1140 static int probed;
1141 int err;
1142
1143 if (probed)
1144 return ERR_PTR(-ENODEV);
1145 probed++;
1146
1147 dev = alloc_etherdev(0);
1148 if (!dev)
1149 return ERR_PTR(-ENOMEM);
1150
1151 if (unit >= 0) {
1152 sprintf(dev->name, "eth%d", unit);
1153 netdev_boot_setup_check(dev);
1154 } else {
1155 dev->base_addr = io;
1156 dev->irq = irq;
1157 }
1158
1159 #ifdef ENABLE_MVME16x_NET
1160 if (MACH_IS_MVME16x) {
1161 if (mvme16x_config & MVME16x_CONFIG_NO_ETHERNET) {
1162 printk(KERN_NOTICE "Ethernet probe disabled - chip not present\n");
1163 err = -ENODEV;
1164 goto out;
1165 }
1166 memcpy(eth_addr, (void *) 0xfffc1f2c, 6); /* YUCK! Get addr from NOVRAM */
1167 dev->base_addr = MVME_I596_BASE;
1168 dev->irq = (unsigned) MVME16x_IRQ_I596;
1169 }
1170 #endif
1171 #ifdef ENABLE_BVME6000_NET
1172 if (MACH_IS_BVME6000) {
1173 volatile unsigned char *rtc = (unsigned char *) BVME_RTC_BASE;
1174 unsigned char msr = rtc[3];
1175 int i;
1176
1177 rtc[3] |= 0x80;
1178 for (i = 0; i < 6; i++)
1179 eth_addr[i] = rtc[i * 4 + 7]; /* Stored in RTC RAM at offset 1 */
1180 rtc[3] = msr;
1181 dev->base_addr = BVME_I596_BASE;
1182 dev->irq = (unsigned) BVME_IRQ_I596;
1183 }
1184 #endif
1185 #ifdef ENABLE_APRICOT
1186 {
1187 int checksum = 0;
1188 int ioaddr = 0x300;
1189
1190 /* this is easy the ethernet interface can only be at 0x300 */
1191 /* first check nothing is already registered here */
1192
1193 if (!request_region(ioaddr, I596_TOTAL_SIZE, DRV_NAME)) {
1194 printk(KERN_ERR "82596: IO address 0x%04x in use\n", ioaddr);
1195 err = -EBUSY;
1196 goto out;
1197 }
1198
1199 for (i = 0; i < 8; i++) {
1200 eth_addr[i] = inb(ioaddr + 8 + i);
1201 checksum += eth_addr[i];
1202 }
1203
1204 /* checksum is a multiple of 0x100, got this wrong first time
1205 some machines have 0x100, some 0x200. The DOS driver doesn't
1206 even bother with the checksum.
1207 Some other boards trip the checksum.. but then appear as
1208 ether address 0. Trap these - AC */
1209
1210 if ((checksum % 0x100) ||
1211 (memcmp(eth_addr, "\x00\x00\x49", 3) != 0)) {
1212 err = -ENODEV;
1213 goto out1;
1214 }
1215
1216 dev->base_addr = ioaddr;
1217 dev->irq = 10;
1218 }
1219 #endif
1220 dev->mem_start = (int)__get_free_pages(GFP_ATOMIC, 0);
1221 if (!dev->mem_start) {
1222 err = -ENOMEM;
1223 goto out1;
1224 }
1225
1226 DEB(DEB_PROBE,printk(KERN_INFO "%s: 82596 at %#3lx,", dev->name, dev->base_addr));
1227
1228 for (i = 0; i < 6; i++)
1229 DEB(DEB_PROBE,printk(" %2.2X", dev->dev_addr[i] = eth_addr[i]));
1230
1231 DEB(DEB_PROBE,printk(" IRQ %d.\n", dev->irq));
1232
1233 DEB(DEB_PROBE,printk(KERN_INFO "%s", version));
1234
1235 /* The 82596-specific entries in the device structure. */
1236 SET_MODULE_OWNER(dev);
1237 dev->open = i596_open;
1238 dev->stop = i596_close;
1239 dev->hard_start_xmit = i596_start_xmit;
1240 dev->get_stats = i596_get_stats;
1241 dev->set_multicast_list = set_multicast_list;
1242 dev->tx_timeout = i596_tx_timeout;
1243 dev->watchdog_timeo = TX_TIMEOUT;
1244
1245 dev->priv = (void *)(dev->mem_start);
1246
1247 lp = dev->priv;
1248 DEB(DEB_INIT,printk(KERN_DEBUG "%s: lp at 0x%08lx (%zd bytes), "
1249 "lp->scb at 0x%08lx\n",
1250 dev->name, (unsigned long)lp,
1251 sizeof(struct i596_private), (unsigned long)&lp->scb));
1252 memset((void *) lp, 0, sizeof(struct i596_private));
1253
1254 #ifdef __mc68000__
1255 cache_push(virt_to_phys((void *)(dev->mem_start)), 4096);
1256 cache_clear(virt_to_phys((void *)(dev->mem_start)), 4096);
1257 kernel_set_cachemode((void *)(dev->mem_start), 4096, IOMAP_NOCACHE_SER);
1258 #endif
1259 lp->scb.command = 0;
1260 lp->scb.cmd = I596_NULL;
1261 lp->scb.rfd = I596_NULL;
1262 spin_lock_init(&lp->lock);
1263
1264 err = register_netdev(dev);
1265 if (err)
1266 goto out2;
1267 return dev;
1268 out2:
1269 #ifdef __mc68000__
1270 /* XXX This assumes default cache mode to be IOMAP_FULL_CACHING,
1271 * XXX which may be invalid (CONFIG_060_WRITETHROUGH)
1272 */
1273 kernel_set_cachemode((void *)(dev->mem_start), 4096,
1274 IOMAP_FULL_CACHING);
1275 #endif
1276 free_page ((u32)(dev->mem_start));
1277 out1:
1278 #ifdef ENABLE_APRICOT
1279 release_region(dev->base_addr, I596_TOTAL_SIZE);
1280 #endif
1281 out:
1282 free_netdev(dev);
1283 return ERR_PTR(err);
1284 }
1285
1286 static irqreturn_t i596_interrupt(int irq, void *dev_id)
1287 {
1288 struct net_device *dev = dev_id;
1289 struct i596_private *lp;
1290 short ioaddr;
1291 unsigned short status, ack_cmd = 0;
1292 int handled = 0;
1293
1294 #ifdef ENABLE_BVME6000_NET
1295 if (MACH_IS_BVME6000) {
1296 if (*(char *) BVME_LOCAL_IRQ_STAT & BVME_ETHERR) {
1297 i596_error(irq, dev_id);
1298 return IRQ_HANDLED;
1299 }
1300 }
1301 #endif
1302 if (dev == NULL) {
1303 printk(KERN_ERR "i596_interrupt(): irq %d for unknown device.\n", irq);
1304 return IRQ_NONE;
1305 }
1306
1307 ioaddr = dev->base_addr;
1308 lp = dev->priv;
1309
1310 spin_lock (&lp->lock);
1311
1312 wait_cmd(dev,lp,100,"i596 interrupt, timeout");
1313 status = lp->scb.status;
1314
1315 DEB(DEB_INTS,printk(KERN_DEBUG "%s: i596 interrupt, IRQ %d, status %4.4x.\n",
1316 dev->name, irq, status));
1317
1318 ack_cmd = status & 0xf000;
1319
1320 if ((status & 0x8000) || (status & 0x2000)) {
1321 struct i596_cmd *ptr;
1322
1323 handled = 1;
1324 if ((status & 0x8000))
1325 DEB(DEB_INTS,printk(KERN_DEBUG "%s: i596 interrupt completed command.\n", dev->name));
1326 if ((status & 0x2000))
1327 DEB(DEB_INTS,printk(KERN_DEBUG "%s: i596 interrupt command unit inactive %x.\n", dev->name, status & 0x0700));
1328
1329 while ((lp->cmd_head != I596_NULL) && (lp->cmd_head->status & STAT_C)) {
1330 ptr = lp->cmd_head;
1331
1332 DEB(DEB_STATUS,printk(KERN_DEBUG "cmd_head->status = %04x, ->command = %04x\n",
1333 lp->cmd_head->status, lp->cmd_head->command));
1334 lp->cmd_head = ptr->v_next;
1335 lp->cmd_backlog--;
1336
1337 switch ((ptr->command) & 0x7) {
1338 case CmdTx:
1339 {
1340 struct tx_cmd *tx_cmd = (struct tx_cmd *) ptr;
1341 struct sk_buff *skb = tx_cmd->skb;
1342
1343 if ((ptr->status) & STAT_OK) {
1344 DEB(DEB_TXADDR,print_eth(skb->data, "tx-done"));
1345 } else {
1346 lp->stats.tx_errors++;
1347 if ((ptr->status) & 0x0020)
1348 lp->stats.collisions++;
1349 if (!((ptr->status) & 0x0040))
1350 lp->stats.tx_heartbeat_errors++;
1351 if ((ptr->status) & 0x0400)
1352 lp->stats.tx_carrier_errors++;
1353 if ((ptr->status) & 0x0800)
1354 lp->stats.collisions++;
1355 if ((ptr->status) & 0x1000)
1356 lp->stats.tx_aborted_errors++;
1357 }
1358
1359 dev_kfree_skb_irq(skb);
1360
1361 tx_cmd->cmd.command = 0; /* Mark free */
1362 break;
1363 }
1364 case CmdTDR:
1365 {
1366 unsigned short status = ((struct tdr_cmd *)ptr)->status;
1367
1368 if (status & 0x8000) {
1369 DEB(DEB_TDR,printk(KERN_INFO "%s: link ok.\n", dev->name));
1370 } else {
1371 if (status & 0x4000)
1372 printk(KERN_ERR "%s: Transceiver problem.\n", dev->name);
1373 if (status & 0x2000)
1374 printk(KERN_ERR "%s: Termination problem.\n", dev->name);
1375 if (status & 0x1000)
1376 printk(KERN_ERR "%s: Short circuit.\n", dev->name);
1377
1378 DEB(DEB_TDR,printk(KERN_INFO "%s: Time %d.\n", dev->name, status & 0x07ff));
1379 }
1380 break;
1381 }
1382 case CmdConfigure:
1383 case CmdMulticastList:
1384 /* Zap command so set_multicast_list() knows it is free */
1385 ptr->command = 0;
1386 break;
1387 }
1388 ptr->v_next = ptr->b_next = I596_NULL;
1389 lp->last_cmd = jiffies;
1390 }
1391
1392 ptr = lp->cmd_head;
1393 while ((ptr != I596_NULL) && (ptr != lp->cmd_tail)) {
1394 ptr->command &= 0x1fff;
1395 ptr = ptr->v_next;
1396 }
1397
1398 if ((lp->cmd_head != I596_NULL))
1399 ack_cmd |= CUC_START;
1400 lp->scb.cmd = WSWAPcmd(virt_to_bus(&lp->cmd_head->status));
1401 }
1402 if ((status & 0x1000) || (status & 0x4000)) {
1403 if ((status & 0x4000))
1404 DEB(DEB_INTS,printk(KERN_DEBUG "%s: i596 interrupt received a frame.\n", dev->name));
1405 i596_rx(dev);
1406 /* Only RX_START if stopped - RGH 07-07-96 */
1407 if (status & 0x1000) {
1408 if (netif_running(dev)) {
1409 DEB(DEB_ERRORS,printk(KERN_ERR "%s: i596 interrupt receive unit inactive, status 0x%x\n", dev->name, status));
1410 ack_cmd |= RX_START;
1411 lp->stats.rx_errors++;
1412 lp->stats.rx_fifo_errors++;
1413 rebuild_rx_bufs(dev);
1414 }
1415 }
1416 }
1417 wait_cmd(dev,lp,100,"i596 interrupt, timeout");
1418 lp->scb.command = ack_cmd;
1419
1420 #ifdef ENABLE_MVME16x_NET
1421 if (MACH_IS_MVME16x) {
1422 /* Ack the interrupt */
1423
1424 volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000;
1425
1426 pcc2[0x2a] |= 0x08;
1427 }
1428 #endif
1429 #ifdef ENABLE_BVME6000_NET
1430 if (MACH_IS_BVME6000) {
1431 volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG;
1432
1433 *ethirq = 1;
1434 *ethirq = 3;
1435 }
1436 #endif
1437 #ifdef ENABLE_APRICOT
1438 (void) inb(ioaddr + 0x10);
1439 outb(4, ioaddr + 0xf);
1440 #endif
1441 CA(dev);
1442
1443 DEB(DEB_INTS,printk(KERN_DEBUG "%s: exiting interrupt.\n", dev->name));
1444
1445 spin_unlock (&lp->lock);
1446 return IRQ_RETVAL(handled);
1447 }
1448
1449 static int i596_close(struct net_device *dev)
1450 {
1451 struct i596_private *lp = dev->priv;
1452 unsigned long flags;
1453
1454 netif_stop_queue(dev);
1455
1456 DEB(DEB_INIT,printk(KERN_DEBUG "%s: Shutting down ethercard, status was %4.4x.\n",
1457 dev->name, lp->scb.status));
1458
1459 spin_lock_irqsave(&lp->lock, flags);
1460
1461 wait_cmd(dev,lp,100,"close1 timed out");
1462 lp->scb.command = CUC_ABORT | RX_ABORT;
1463 CA(dev);
1464
1465 wait_cmd(dev,lp,100,"close2 timed out");
1466
1467 spin_unlock_irqrestore(&lp->lock, flags);
1468 DEB(DEB_STRUCT,i596_display_data(dev));
1469 i596_cleanup_cmd(dev,lp);
1470
1471 #ifdef ENABLE_MVME16x_NET
1472 if (MACH_IS_MVME16x) {
1473 volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000;
1474
1475 /* Disable all ints */
1476 pcc2[0x28] = 1;
1477 pcc2[0x2a] = 0x40;
1478 pcc2[0x2b] = 0x40; /* Set snooping bits now! */
1479 }
1480 #endif
1481 #ifdef ENABLE_BVME6000_NET
1482 if (MACH_IS_BVME6000) {
1483 volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG;
1484
1485 *ethirq = 1;
1486 }
1487 #endif
1488
1489 free_irq(dev->irq, dev);
1490 remove_rx_bufs(dev);
1491
1492 return 0;
1493 }
1494
1495 static struct net_device_stats *
1496 i596_get_stats(struct net_device *dev)
1497 {
1498 struct i596_private *lp = dev->priv;
1499
1500 return &lp->stats;
1501 }
1502
1503 /*
1504 * Set or clear the multicast filter for this adaptor.
1505 */
1506
1507 static void set_multicast_list(struct net_device *dev)
1508 {
1509 struct i596_private *lp = dev->priv;
1510 int config = 0, cnt;
1511
1512 DEB(DEB_MULTI,printk(KERN_DEBUG "%s: set multicast list, %d entries, promisc %s, allmulti %s\n",
1513 dev->name, dev->mc_count,
1514 dev->flags & IFF_PROMISC ? "ON" : "OFF",
1515 dev->flags & IFF_ALLMULTI ? "ON" : "OFF"));
1516
1517 if (wait_cfg(dev, &lp->cf_cmd.cmd, 1000, "config change request timed out"))
1518 return;
1519
1520 if ((dev->flags & IFF_PROMISC) && !(lp->cf_cmd.i596_config[8] & 0x01)) {
1521 lp->cf_cmd.i596_config[8] |= 0x01;
1522 config = 1;
1523 }
1524 if (!(dev->flags & IFF_PROMISC) && (lp->cf_cmd.i596_config[8] & 0x01)) {
1525 lp->cf_cmd.i596_config[8] &= ~0x01;
1526 config = 1;
1527 }
1528 if ((dev->flags & IFF_ALLMULTI) && (lp->cf_cmd.i596_config[11] & 0x20)) {
1529 lp->cf_cmd.i596_config[11] &= ~0x20;
1530 config = 1;
1531 }
1532 if (!(dev->flags & IFF_ALLMULTI) && !(lp->cf_cmd.i596_config[11] & 0x20)) {
1533 lp->cf_cmd.i596_config[11] |= 0x20;
1534 config = 1;
1535 }
1536 if (config) {
1537 lp->cf_cmd.cmd.command = CmdConfigure;
1538 i596_add_cmd(dev, &lp->cf_cmd.cmd);
1539 }
1540
1541 cnt = dev->mc_count;
1542 if (cnt > MAX_MC_CNT)
1543 {
1544 cnt = MAX_MC_CNT;
1545 printk(KERN_ERR "%s: Only %d multicast addresses supported",
1546 dev->name, cnt);
1547 }
1548
1549 if (dev->mc_count > 0) {
1550 struct dev_mc_list *dmi;
1551 unsigned char *cp;
1552 struct mc_cmd *cmd;
1553
1554 if (wait_cfg(dev, &lp->mc_cmd.cmd, 1000, "multicast list change request timed out"))
1555 return;
1556 cmd = &lp->mc_cmd;
1557 cmd->cmd.command = CmdMulticastList;
1558 cmd->mc_cnt = dev->mc_count * 6;
1559 cp = cmd->mc_addrs;
1560 for (dmi = dev->mc_list; cnt && dmi != NULL; dmi = dmi->next, cnt--, cp += 6) {
1561 memcpy(cp, dmi->dmi_addr, 6);
1562 if (i596_debug > 1)
1563 DEB(DEB_MULTI,printk(KERN_INFO "%s: Adding address %02x:%02x:%02x:%02x:%02x:%02x\n",
1564 dev->name, cp[0],cp[1],cp[2],cp[3],cp[4],cp[5]));
1565 }
1566 i596_add_cmd(dev, &cmd->cmd);
1567 }
1568 }
1569
1570 #ifdef MODULE
1571 static struct net_device *dev_82596;
1572
1573 #ifdef ENABLE_APRICOT
1574 module_param(irq, int, 0);
1575 MODULE_PARM_DESC(irq, "Apricot IRQ number");
1576 #endif
1577
1578 static int debug = -1;
1579 module_param(debug, int, 0);
1580 MODULE_PARM_DESC(debug, "i82596 debug mask");
1581
1582 int __init init_module(void)
1583 {
1584 if (debug >= 0)
1585 i596_debug = debug;
1586 dev_82596 = i82596_probe(-1);
1587 if (IS_ERR(dev_82596))
1588 return PTR_ERR(dev_82596);
1589 return 0;
1590 }
1591
1592 void __exit cleanup_module(void)
1593 {
1594 unregister_netdev(dev_82596);
1595 #ifdef __mc68000__
1596 /* XXX This assumes default cache mode to be IOMAP_FULL_CACHING,
1597 * XXX which may be invalid (CONFIG_060_WRITETHROUGH)
1598 */
1599
1600 kernel_set_cachemode((void *)(dev_82596->mem_start), 4096,
1601 IOMAP_FULL_CACHING);
1602 #endif
1603 free_page ((u32)(dev_82596->mem_start));
1604 #ifdef ENABLE_APRICOT
1605 /* If we don't do this, we can't re-insmod it later. */
1606 release_region(dev_82596->base_addr, I596_TOTAL_SIZE);
1607 #endif
1608 free_netdev(dev_82596);
1609 }
1610
1611 #endif /* MODULE */
1612
1613 /*
1614 * Local variables:
1615 * compile-command: "gcc -D__KERNEL__ -I/usr/src/linux/net/inet -Wall -Wstrict-prototypes -O6 -m486 -c 82596.c"
1616 * End:
1617 */
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