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1da177e4
LT		 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
1da177e4
LT		 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
61static 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
146static int i596_debug = (DEB_SERIOUS|DEB_PROBE);
147
148MODULE_AUTHOR("Richard Hirst");
149MODULE_DESCRIPTION("i82596 driver");
150MODULE_LICENSE("GPL");
151
152module_param(i596_debug, int, 0);
153MODULE_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 */
159static 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
174enum 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
196struct 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
205struct 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
222struct 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
229struct 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
237struct tdr_cmd {
238 struct i596_cmd cmd;
239 unsigned short status;
240 unsigned short pad;
241};
242
243struct mc_cmd {
244 struct i596_cmd cmd;
245 short mc_cnt;
246 char mc_addrs[MAX_MC_CNT*6];
247};
248
249struct sa_cmd {
250 struct i596_cmd cmd;
251 char eth_addr[8];
252};
253
254struct cf_cmd {
255 struct i596_cmd cmd;
256 char i596_config[16];
257};
258
259struct 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
270struct 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
286struct 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
301struct i596_iscp {
302 unsigned long stat;
303 struct i596_scb *scb;
304};
305
306struct i596_scp {
307 unsigned long sysbus;
308 unsigned long pad;
309 struct i596_iscp *iscp;
310};
311
312struct 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
337static 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
358static int i596_open(struct net_device *dev);
359static int i596_start_xmit(struct sk_buff *skb, struct net_device *dev);
360static irqreturn_t i596_interrupt(int irq, void *dev_id, struct pt_regs *regs);
361static int i596_close(struct net_device *dev);
362static struct net_device_stats *i596_get_stats(struct net_device *dev);
363static void i596_add_cmd(struct net_device *dev, struct i596_cmd *cmd);
364static void i596_tx_timeout (struct net_device *dev);
365static void print_eth(unsigned char *buf, char *str);
366static void set_multicast_list(struct net_device *dev);
367
368static int rx_ring_size = RX_RING_SIZE;
369static int ticks_limit = 25;
370static int max_cmd_backlog = TX_RING_SIZE-1;
371
372
373static 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
395static 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
416static 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
430static 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
444static inline int wait_cfg(struct net_device *dev, struct i596_cmd *cmd, int delcnt, char *str)
445{
446 volatile struct i596_cmd *c = cmd;
6aa20a22 447
1da177e4
LT		 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
6aa20a22 458
1da177e4
LT		 459static 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)
504static irqreturn_t i596_error(int irq, void *dev_id, struct pt_regs *regs)
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
529static 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;
689be439
DM		 548 rbd->v_data = skb->data;
549 rbd->b_data = WSWAPchar(virt_to_bus(skb->data));
1da177e4
LT		 550 rbd->size = PKT_BUF_SZ;
551#ifdef __mc68000__
689be439 552 cache_clear(virt_to_phys(skb->data), PKT_BUF_SZ);
1da177e4
LT		 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
580static 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
594static 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
613static int init_i596_mem(struct net_device *dev)
614{
615 struct i596_private *lp = dev->priv;
0018dfa4 616#if !defined(ENABLE_MVME16x_NET) && !defined(ENABLE_BVME6000_NET) || defined(ENABLE_APRICOT)
1da177e4
LT		 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
760failed:
761 printk(KERN_CRIT "%s: Failed to initialise 82596\n", dev->name);
762 MPU_PORT(dev, PORT_RESET, NULL);
763 return -1;
764}
765
766static 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));
6aa20a22 790
1da177e4
LT		 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;
689be439
DM		 818 rbd->v_data = newskb->data;
819 rbd->b_data = WSWAPchar(virt_to_bus(newskb->data));
1da177e4 820#ifdef __mc68000__
689be439 821 cache_clear(virt_to_phys(newskb->data), PKT_BUF_SZ);
1da177e4
LT		 822#endif
823 }
824 else
825 skb = dev_alloc_skb(pkt_len + 2);
826memory_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 skb->dev = dev;
834 if (!rx_in_place) {
835 /* 16 byte align the data fields */
836 skb_reserve(skb, 2);
837 memcpy(skb_put(skb,pkt_len), rbd->v_data, pkt_len);
838 }
839 skb->protocol=eth_type_trans(skb,dev);
840 skb->len = pkt_len;
841#ifdef __mc68000__
689be439 842 cache_clear(virt_to_phys(rbd->skb->data),
1da177e4
LT		 843 pkt_len);
844#endif
845 netif_rx(skb);
846 dev->last_rx = jiffies;
847 lp->stats.rx_packets++;
848 lp->stats.rx_bytes+=pkt_len;
849 }
850 }
851 else {
852 DEB(DEB_ERRORS, printk(KERN_DEBUG "%s: Error, rfd.stat = 0x%04x\n",
853 dev->name, rfd->stat));
854 lp->stats.rx_errors++;
855 if ((rfd->stat) & 0x0001)
856 lp->stats.collisions++;
857 if ((rfd->stat) & 0x0080)
858 lp->stats.rx_length_errors++;
859 if ((rfd->stat) & 0x0100)
860 lp->stats.rx_over_errors++;
861 if ((rfd->stat) & 0x0200)
862 lp->stats.rx_fifo_errors++;
863 if ((rfd->stat) & 0x0400)
864 lp->stats.rx_frame_errors++;
865 if ((rfd->stat) & 0x0800)
866 lp->stats.rx_crc_errors++;
867 if ((rfd->stat) & 0x1000)
868 lp->stats.rx_length_errors++;
869 }
870
871 /* Clear the buffer descriptor count and EOF + F flags */
872
873 if (rbd != I596_NULL && (rbd->count & 0x4000)) {
874 rbd->count = 0;
875 lp->rbd_head = rbd->v_next;
876 }
877
878 /* Tidy the frame descriptor, marking it as end of list */
879
880 rfd->rbd = I596_NULL;
881 rfd->stat = 0;
882 rfd->cmd = CMD_EOL|CMD_FLEX;
883 rfd->count = 0;
884
885 /* Remove end-of-list from old end descriptor */
886
887 rfd->v_prev->cmd = CMD_FLEX;
888
889 /* Update record of next frame descriptor to process */
890
891 lp->scb.rfd = rfd->b_next;
892 lp->rfd_head = rfd->v_next;
893 rfd = lp->rfd_head;
894 }
895
896 DEB(DEB_RXFRAME,printk(KERN_DEBUG "frames %d\n", frames));
897
898 return 0;
899}
900
901
864fe05d 902static void i596_cleanup_cmd(struct net_device *dev, struct i596_private *lp)
1da177e4
LT		 903{
904 struct i596_cmd *ptr;
905
906 while (lp->cmd_head != I596_NULL) {
907 ptr = lp->cmd_head;
908 lp->cmd_head = ptr->v_next;
909 lp->cmd_backlog--;
910
911 switch ((ptr->command) & 0x7) {
912 case CmdTx:
913 {
914 struct tx_cmd *tx_cmd = (struct tx_cmd *) ptr;
915 struct sk_buff *skb = tx_cmd->skb;
916
917 dev_kfree_skb(skb);
918
919 lp->stats.tx_errors++;
920 lp->stats.tx_aborted_errors++;
921
922 ptr->v_next = ptr->b_next = I596_NULL;
923 tx_cmd->cmd.command = 0; /* Mark as free */
924 break;
925 }
926 default:
927 ptr->v_next = ptr->b_next = I596_NULL;
928 }
929 }
930
931 wait_cmd(dev,lp,100,"i596_cleanup_cmd timed out");
932 lp->scb.cmd = I596_NULL;
933}
934
864fe05d
AM		 935static void i596_reset(struct net_device *dev, struct i596_private *lp,
936 int ioaddr)
1da177e4
LT		 937{
938 unsigned long flags;
939
940 DEB(DEB_RESET,printk(KERN_DEBUG "i596_reset\n"));
941
942 spin_lock_irqsave (&lp->lock, flags);
943
944 wait_cmd(dev,lp,100,"i596_reset timed out");
945
946 netif_stop_queue(dev);
947
948 lp->scb.command = CUC_ABORT | RX_ABORT;
949 CA(dev);
950
951 /* wait for shutdown */
952 wait_cmd(dev,lp,1000,"i596_reset 2 timed out");
953 spin_unlock_irqrestore (&lp->lock, flags);
954
955 i596_cleanup_cmd(dev,lp);
956 i596_rx(dev);
957
958 netif_start_queue(dev);
959 init_i596_mem(dev);
960}
961
962static void i596_add_cmd(struct net_device *dev, struct i596_cmd *cmd)
963{
964 struct i596_private *lp = dev->priv;
965 int ioaddr = dev->base_addr;
966 unsigned long flags;
967
968 DEB(DEB_ADDCMD,printk(KERN_DEBUG "i596_add_cmd\n"));
969
970 cmd->status = 0;
971 cmd->command |= (CMD_EOL | CMD_INTR);
972 cmd->v_next = cmd->b_next = I596_NULL;
973
974 spin_lock_irqsave (&lp->lock, flags);
975
976 if (lp->cmd_head != I596_NULL) {
977 lp->cmd_tail->v_next = cmd;
978 lp->cmd_tail->b_next = WSWAPcmd(virt_to_bus(&cmd->status));
979 } else {
980 lp->cmd_head = cmd;
981 wait_cmd(dev,lp,100,"i596_add_cmd timed out");
982 lp->scb.cmd = WSWAPcmd(virt_to_bus(&cmd->status));
983 lp->scb.command = CUC_START;
984 CA(dev);
985 }
986 lp->cmd_tail = cmd;
987 lp->cmd_backlog++;
988
989 spin_unlock_irqrestore (&lp->lock, flags);
990
991 if (lp->cmd_backlog > max_cmd_backlog) {
992 unsigned long tickssofar = jiffies - lp->last_cmd;
993
994 if (tickssofar < ticks_limit)
995 return;
996
997 printk(KERN_NOTICE "%s: command unit timed out, status resetting.\n", dev->name);
998
999 i596_reset(dev, lp, ioaddr);
1000 }
1001}
1002
1003static int i596_open(struct net_device *dev)
1004{
1005 int res = 0;
1006
1007 DEB(DEB_OPEN,printk(KERN_DEBUG "%s: i596_open() irq %d.\n", dev->name, dev->irq));
1008
1009 if (request_irq(dev->irq, i596_interrupt, 0, "i82596", dev)) {
1010 printk(KERN_ERR "%s: IRQ %d not free\n", dev->name, dev->irq);
1011 return -EAGAIN;
1012 }
1013#ifdef ENABLE_MVME16x_NET
1014 if (MACH_IS_MVME16x) {
1015 if (request_irq(0x56, i596_error, 0, "i82596_error", dev))
1016 return -EAGAIN;
1017 }
1018#endif
1019 init_rx_bufs(dev);
1020
1021 netif_start_queue(dev);
1022
1023 /* Initialize the 82596 memory */
1024 if (init_i596_mem(dev)) {
1025 res = -EAGAIN;
1026 free_irq(dev->irq, dev);
1027 }
1028
1029 return res;
1030}
1031
1032static void i596_tx_timeout (struct net_device *dev)
1033{
1034 struct i596_private *lp = dev->priv;
1035 int ioaddr = dev->base_addr;
1036
1037 /* Transmitter timeout, serious problems. */
1038 DEB(DEB_ERRORS,printk(KERN_ERR "%s: transmit timed out, status resetting.\n",
1039 dev->name));
1040
1041 lp->stats.tx_errors++;
1042
1043 /* Try to restart the adaptor */
1044 if (lp->last_restart == lp->stats.tx_packets) {
1045 DEB(DEB_ERRORS,printk(KERN_ERR "Resetting board.\n"));
1046 /* Shutdown and restart */
1047 i596_reset (dev, lp, ioaddr);
1048 } else {
1049 /* Issue a channel attention signal */
1050 DEB(DEB_ERRORS,printk(KERN_ERR "Kicking board.\n"));
1051 lp->scb.command = CUC_START | RX_START;
1052 CA (dev);
1053 lp->last_restart = lp->stats.tx_packets;
1054 }
1055
1056 dev->trans_start = jiffies;
1057 netif_wake_queue (dev);
1058}
1059
1060
1061static int i596_start_xmit(struct sk_buff *skb, struct net_device *dev)
1062{
1063 struct i596_private *lp = dev->priv;
1064 struct tx_cmd *tx_cmd;
1065 struct i596_tbd *tbd;
1066 short length = skb->len;
1067 dev->trans_start = jiffies;
1068
1069 DEB(DEB_STARTTX,printk(KERN_DEBUG "%s: i596_start_xmit(%x,%x) called\n", dev->name,
1070 skb->len, (unsigned int)skb->data));
1071
1072 if (skb->len < ETH_ZLEN) {
5b057c6b 1073 if (skb_padto(skb, ETH_ZLEN))
1da177e4
LT		 1074 return 0;
1075 length = ETH_ZLEN;
1076 }
1077 netif_stop_queue(dev);
1078
1079 tx_cmd = lp->tx_cmds + lp->next_tx_cmd;
1080 tbd = lp->tbds + lp->next_tx_cmd;
1081
1082 if (tx_cmd->cmd.command) {
1083 printk(KERN_NOTICE "%s: xmit ring full, dropping packet.\n",
1084 dev->name);
1085 lp->stats.tx_dropped++;
1086
1087 dev_kfree_skb(skb);
1088 } else {
1089 if (++lp->next_tx_cmd == TX_RING_SIZE)
1090 lp->next_tx_cmd = 0;
1091 tx_cmd->tbd = WSWAPtbd(virt_to_bus(tbd));
1092 tbd->next = I596_NULL;
1093
1094 tx_cmd->cmd.command = CMD_FLEX | CmdTx;
1095 tx_cmd->skb = skb;
1096
1097 tx_cmd->pad = 0;
1098 tx_cmd->size = 0;
1099 tbd->pad = 0;
1100 tbd->size = EOF | length;
1101
1102 tbd->data = WSWAPchar(virt_to_bus(skb->data));
1103
1104#ifdef __mc68000__
1105 cache_push(virt_to_phys(skb->data), length);
1106#endif
1107 DEB(DEB_TXADDR,print_eth(skb->data, "tx-queued"));
1108 i596_add_cmd(dev, &tx_cmd->cmd);
1109
1110 lp->stats.tx_packets++;
1111 lp->stats.tx_bytes += length;
1112 }
1113
1114 netif_start_queue(dev);
1115
1116 return 0;
1117}
1118
1119static void print_eth(unsigned char *add, char *str)
1120{
1121 int i;
1122
1123 printk(KERN_DEBUG "i596 0x%p, ", add);
1124 for (i = 0; i < 6; i++)
1125 printk(" %02X", add[i + 6]);
1126 printk(" -->");
1127 for (i = 0; i < 6; i++)
1128 printk(" %02X", add[i]);
1129 printk(" %02X%02X, %s\n", add[12], add[13], str);
1130}
1131
1132static int io = 0x300;
1133static int irq = 10;
1134
1135struct net_device * __init i82596_probe(int unit)
1136{
1137 struct net_device *dev;
1138 int i;
1139 struct i596_private *lp;
1140 char eth_addr[8];
1141 static int probed;
1142 int err;
1143
1144 if (probed)
1145 return ERR_PTR(-ENODEV);
1146 probed++;
1147
1148 dev = alloc_etherdev(0);
1149 if (!dev)
1150 return ERR_PTR(-ENOMEM);
1151
1152 if (unit >= 0) {
1153 sprintf(dev->name, "eth%d", unit);
1154 netdev_boot_setup_check(dev);
1155 } else {
1156 dev->base_addr = io;
1157 dev->irq = irq;
1158 }
1159
1160#ifdef ENABLE_MVME16x_NET
1161 if (MACH_IS_MVME16x) {
1162 if (mvme16x_config & MVME16x_CONFIG_NO_ETHERNET) {
1163 printk(KERN_NOTICE "Ethernet probe disabled - chip not present\n");
1164 err = -ENODEV;
1165 goto out;
1166 }
1167 memcpy(eth_addr, (void *) 0xfffc1f2c, 6); /* YUCK! Get addr from NOVRAM */
1168 dev->base_addr = MVME_I596_BASE;
1169 dev->irq = (unsigned) MVME16x_IRQ_I596;
1170 }
1171#endif
1172#ifdef ENABLE_BVME6000_NET
1173 if (MACH_IS_BVME6000) {
1174 volatile unsigned char *rtc = (unsigned char *) BVME_RTC_BASE;
1175 unsigned char msr = rtc[3];
1176 int i;
1177
1178 rtc[3] |= 0x80;
1179 for (i = 0; i < 6; i++)
1180 eth_addr[i] = rtc[i * 4 + 7]; /* Stored in RTC RAM at offset 1 */
1181 rtc[3] = msr;
1182 dev->base_addr = BVME_I596_BASE;
1183 dev->irq = (unsigned) BVME_IRQ_I596;
1184 }
1185#endif
1186#ifdef ENABLE_APRICOT
1187 {
1188 int checksum = 0;
1189 int ioaddr = 0x300;
1190
1191 /* this is easy the ethernet interface can only be at 0x300 */
1192 /* first check nothing is already registered here */
1193
1194 if (!request_region(ioaddr, I596_TOTAL_SIZE, DRV_NAME)) {
1195 printk(KERN_ERR "82596: IO address 0x%04x in use\n", ioaddr);
1196 err = -EBUSY;
1197 goto out;
1198 }
1199
1200 for (i = 0; i < 8; i++) {
1201 eth_addr[i] = inb(ioaddr + 8 + i);
1202 checksum += eth_addr[i];
1203 }
1204
1205 /* checksum is a multiple of 0x100, got this wrong first time
1206 some machines have 0x100, some 0x200. The DOS driver doesn't
1207 even bother with the checksum.
1208 Some other boards trip the checksum.. but then appear as
1209 ether address 0. Trap these - AC */
1210
6aa20a22 1211 if ((checksum % 0x100) ||
1da177e4
LT		 1212 (memcmp(eth_addr, "\x00\x00\x49", 3) != 0)) {
1213 err = -ENODEV;
1214 goto out1;
1215 }
1216
1217 dev->base_addr = ioaddr;
1218 dev->irq = 10;
1219 }
1220#endif
1221 dev->mem_start = (int)__get_free_pages(GFP_ATOMIC, 0);
1222 if (!dev->mem_start) {
1223 err = -ENOMEM;
1224 goto out1;
1225 }
1226
1227 DEB(DEB_PROBE,printk(KERN_INFO "%s: 82596 at %#3lx,", dev->name, dev->base_addr));
1228
1229 for (i = 0; i < 6; i++)
1230 DEB(DEB_PROBE,printk(" %2.2X", dev->dev_addr[i] = eth_addr[i]));
1231
1232 DEB(DEB_PROBE,printk(" IRQ %d.\n", dev->irq));
1233
1234 DEB(DEB_PROBE,printk(KERN_INFO "%s", version));
1235
1236 /* The 82596-specific entries in the device structure. */
1237 SET_MODULE_OWNER(dev);
1238 dev->open = i596_open;
1239 dev->stop = i596_close;
1240 dev->hard_start_xmit = i596_start_xmit;
1241 dev->get_stats = i596_get_stats;
1242 dev->set_multicast_list = set_multicast_list;
1243 dev->tx_timeout = i596_tx_timeout;
1244 dev->watchdog_timeo = TX_TIMEOUT;
1245
1246 dev->priv = (void *)(dev->mem_start);
1247
1248 lp = dev->priv;
1249 DEB(DEB_INIT,printk(KERN_DEBUG "%s: lp at 0x%08lx (%d bytes), 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;
1268out2:
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));
1277out1:
1278#ifdef ENABLE_APRICOT
1279 release_region(dev->base_addr, I596_TOTAL_SIZE);
1280#endif
1281out:
1282 free_netdev(dev);
1283 return ERR_PTR(err);
1284}
1285
1286static irqreturn_t i596_interrupt(int irq, void *dev_id, struct pt_regs *regs)
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, regs);
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
1449static 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
1495static 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
1507static 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 }
6aa20a22 1548
1da177e4
LT		 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
1571static struct net_device *dev_82596;
1572
1573#ifdef ENABLE_APRICOT
1574module_param(irq, int, 0);
1575MODULE_PARM_DESC(irq, "Apricot IRQ number");
1576#endif
1577
1578static int debug = -1;
1579module_param(debug, int, 0);
1580MODULE_PARM_DESC(debug, "i82596 debug mask");
1581
864fe05d 1582int __init init_module(void)
1da177e4
LT		 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
864fe05d 1592void __exit cleanup_module(void)
1da177e4
LT		 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 */
6aa20a22 1612
1da177e4
LT		 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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