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[mirror_ubuntu-zesty-kernel.git] / drivers / net / ethernet / i825xx / 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 * performance 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/interrupt.h>
49 #include <linux/delay.h>
50 #include <linux/netdevice.h>
51 #include <linux/etherdevice.h>
52 #include <linux/skbuff.h>
53 #include <linux/init.h>
54 #include <linux/bitops.h>
55 #include <linux/gfp.h>
56
57 #include <asm/io.h>
58 #include <asm/dma.h>
59 #include <asm/pgtable.h>
60 #include <asm/cacheflush.h>
61
62 static char version[] __initdata =
63 "82596.c $Revision: 1.5 $\n";
64
65 #define DRV_NAME "82596"
66
67 /* DEBUG flags
68 */
69
70 #define DEB_INIT 0x0001
71 #define DEB_PROBE 0x0002
72 #define DEB_SERIOUS 0x0004
73 #define DEB_ERRORS 0x0008
74 #define DEB_MULTI 0x0010
75 #define DEB_TDR 0x0020
76 #define DEB_OPEN 0x0040
77 #define DEB_RESET 0x0080
78 #define DEB_ADDCMD 0x0100
79 #define DEB_STATUS 0x0200
80 #define DEB_STARTTX 0x0400
81 #define DEB_RXADDR 0x0800
82 #define DEB_TXADDR 0x1000
83 #define DEB_RXFRAME 0x2000
84 #define DEB_INTS 0x4000
85 #define DEB_STRUCT 0x8000
86 #define DEB_ANY 0xffff
87
88
89 #define DEB(x,y) if (i596_debug & (x)) y
90
91
92 #if defined(CONFIG_MVME16x_NET) || defined(CONFIG_MVME16x_NET_MODULE)
93 #define ENABLE_MVME16x_NET
94 #endif
95 #if defined(CONFIG_BVME6000_NET) || defined(CONFIG_BVME6000_NET_MODULE)
96 #define ENABLE_BVME6000_NET
97 #endif
98
99 #ifdef ENABLE_MVME16x_NET
100 #include <asm/mvme16xhw.h>
101 #endif
102 #ifdef ENABLE_BVME6000_NET
103 #include <asm/bvme6000hw.h>
104 #endif
105
106 /*
107 * Define various macros for Channel Attention, word swapping etc., dependent
108 * on architecture. MVME and BVME are 680x0 based, otherwise it is Intel.
109 */
110
111 #ifdef __mc68000__
112 #define WSWAPrfd(x) ((struct i596_rfd *) (((u32)(x)<<16) | ((((u32)(x)))>>16)))
113 #define WSWAPrbd(x) ((struct i596_rbd *) (((u32)(x)<<16) | ((((u32)(x)))>>16)))
114 #define WSWAPiscp(x) ((struct i596_iscp *)(((u32)(x)<<16) | ((((u32)(x)))>>16)))
115 #define WSWAPscb(x) ((struct i596_scb *) (((u32)(x)<<16) | ((((u32)(x)))>>16)))
116 #define WSWAPcmd(x) ((struct i596_cmd *) (((u32)(x)<<16) | ((((u32)(x)))>>16)))
117 #define WSWAPtbd(x) ((struct i596_tbd *) (((u32)(x)<<16) | ((((u32)(x)))>>16)))
118 #define WSWAPchar(x) ((char *) (((u32)(x)<<16) | ((((u32)(x)))>>16)))
119 #define ISCP_BUSY 0x00010000
120 #else
121 #error 82596.c: unknown architecture
122 #endif
123
124 /*
125 * These were the intel versions, left here for reference. There
126 * are currently no x86 users of this legacy i82596 chip.
127 */
128 #if 0
129 #define WSWAPrfd(x) ((struct i596_rfd *)((long)x))
130 #define WSWAPrbd(x) ((struct i596_rbd *)((long)x))
131 #define WSWAPiscp(x) ((struct i596_iscp *)((long)x))
132 #define WSWAPscb(x) ((struct i596_scb *)((long)x))
133 #define WSWAPcmd(x) ((struct i596_cmd *)((long)x))
134 #define WSWAPtbd(x) ((struct i596_tbd *)((long)x))
135 #define WSWAPchar(x) ((char *)((long)x))
136 #define ISCP_BUSY 0x0001
137 #endif
138
139 /*
140 * The MPU_PORT command allows direct access to the 82596. With PORT access
141 * the following commands are available (p5-18). The 32-bit port command
142 * must be word-swapped with the most significant word written first.
143 * This only applies to VME boards.
144 */
145 #define PORT_RESET 0x00 /* reset 82596 */
146 #define PORT_SELFTEST 0x01 /* selftest */
147 #define PORT_ALTSCP 0x02 /* alternate SCB address */
148 #define PORT_ALTDUMP 0x03 /* Alternate DUMP address */
149
150 static int i596_debug = (DEB_SERIOUS|DEB_PROBE);
151
152 MODULE_AUTHOR("Richard Hirst");
153 MODULE_DESCRIPTION("i82596 driver");
154 MODULE_LICENSE("GPL");
155
156 module_param(i596_debug, int, 0);
157 MODULE_PARM_DESC(i596_debug, "i82596 debug mask");
158
159
160 /* Copy frames shorter than rx_copybreak, otherwise pass on up in
161 * a full sized sk_buff. Value of 100 stolen from tulip.c (!alpha).
162 */
163 static int rx_copybreak = 100;
164
165 #define PKT_BUF_SZ 1536
166 #define MAX_MC_CNT 64
167
168 #define I596_TOTAL_SIZE 17
169
170 #define I596_NULL ((void *)0xffffffff)
171
172 #define CMD_EOL 0x8000 /* The last command of the list, stop. */
173 #define CMD_SUSP 0x4000 /* Suspend after doing cmd. */
174 #define CMD_INTR 0x2000 /* Interrupt after doing cmd. */
175
176 #define CMD_FLEX 0x0008 /* Enable flexible memory model */
177
178 enum commands {
179 CmdNOp = 0, CmdSASetup = 1, CmdConfigure = 2, CmdMulticastList = 3,
180 CmdTx = 4, CmdTDR = 5, CmdDump = 6, CmdDiagnose = 7
181 };
182
183 #define STAT_C 0x8000 /* Set to 0 after execution */
184 #define STAT_B 0x4000 /* Command being executed */
185 #define STAT_OK 0x2000 /* Command executed ok */
186 #define STAT_A 0x1000 /* Command aborted */
187
188 #define CUC_START 0x0100
189 #define CUC_RESUME 0x0200
190 #define CUC_SUSPEND 0x0300
191 #define CUC_ABORT 0x0400
192 #define RX_START 0x0010
193 #define RX_RESUME 0x0020
194 #define RX_SUSPEND 0x0030
195 #define RX_ABORT 0x0040
196
197 #define TX_TIMEOUT (HZ/20)
198
199
200 struct i596_reg {
201 unsigned short porthi;
202 unsigned short portlo;
203 unsigned long ca;
204 };
205
206 #define EOF 0x8000
207 #define SIZE_MASK 0x3fff
208
209 struct i596_tbd {
210 unsigned short size;
211 unsigned short pad;
212 struct i596_tbd *next;
213 char *data;
214 };
215
216 /* The command structure has two 'next' pointers; v_next is the address of
217 * the next command as seen by the CPU, b_next is the address of the next
218 * command as seen by the 82596. The b_next pointer, as used by the 82596
219 * always references the status field of the next command, rather than the
220 * v_next field, because the 82596 is unaware of v_next. It may seem more
221 * logical to put v_next at the end of the structure, but we cannot do that
222 * because the 82596 expects other fields to be there, depending on command
223 * type.
224 */
225
226 struct i596_cmd {
227 struct i596_cmd *v_next; /* Address from CPUs viewpoint */
228 unsigned short status;
229 unsigned short command;
230 struct i596_cmd *b_next; /* Address from i596 viewpoint */
231 };
232
233 struct tx_cmd {
234 struct i596_cmd cmd;
235 struct i596_tbd *tbd;
236 unsigned short size;
237 unsigned short pad;
238 struct sk_buff *skb; /* So we can free it after tx */
239 };
240
241 struct tdr_cmd {
242 struct i596_cmd cmd;
243 unsigned short status;
244 unsigned short pad;
245 };
246
247 struct mc_cmd {
248 struct i596_cmd cmd;
249 short mc_cnt;
250 char mc_addrs[MAX_MC_CNT*6];
251 };
252
253 struct sa_cmd {
254 struct i596_cmd cmd;
255 char eth_addr[8];
256 };
257
258 struct cf_cmd {
259 struct i596_cmd cmd;
260 char i596_config[16];
261 };
262
263 struct i596_rfd {
264 unsigned short stat;
265 unsigned short cmd;
266 struct i596_rfd *b_next; /* Address from i596 viewpoint */
267 struct i596_rbd *rbd;
268 unsigned short count;
269 unsigned short size;
270 struct i596_rfd *v_next; /* Address from CPUs viewpoint */
271 struct i596_rfd *v_prev;
272 };
273
274 struct i596_rbd {
275 unsigned short count;
276 unsigned short zero1;
277 struct i596_rbd *b_next;
278 unsigned char *b_data; /* Address from i596 viewpoint */
279 unsigned short size;
280 unsigned short zero2;
281 struct sk_buff *skb;
282 struct i596_rbd *v_next;
283 struct i596_rbd *b_addr; /* This rbd addr from i596 view */
284 unsigned char *v_data; /* Address from CPUs viewpoint */
285 };
286
287 #define TX_RING_SIZE 64
288 #define RX_RING_SIZE 16
289
290 struct i596_scb {
291 unsigned short status;
292 unsigned short command;
293 struct i596_cmd *cmd;
294 struct i596_rfd *rfd;
295 unsigned long crc_err;
296 unsigned long align_err;
297 unsigned long resource_err;
298 unsigned long over_err;
299 unsigned long rcvdt_err;
300 unsigned long short_err;
301 unsigned short t_on;
302 unsigned short t_off;
303 };
304
305 struct i596_iscp {
306 unsigned long stat;
307 struct i596_scb *scb;
308 };
309
310 struct i596_scp {
311 unsigned long sysbus;
312 unsigned long pad;
313 struct i596_iscp *iscp;
314 };
315
316 struct i596_private {
317 volatile struct i596_scp scp;
318 volatile struct i596_iscp iscp;
319 volatile struct i596_scb scb;
320 struct sa_cmd sa_cmd;
321 struct cf_cmd cf_cmd;
322 struct tdr_cmd tdr_cmd;
323 struct mc_cmd mc_cmd;
324 unsigned long stat;
325 int last_restart __attribute__((aligned(4)));
326 struct i596_rfd *rfd_head;
327 struct i596_rbd *rbd_head;
328 struct i596_cmd *cmd_tail;
329 struct i596_cmd *cmd_head;
330 int cmd_backlog;
331 unsigned long last_cmd;
332 struct i596_rfd rfds[RX_RING_SIZE];
333 struct i596_rbd rbds[RX_RING_SIZE];
334 struct tx_cmd tx_cmds[TX_RING_SIZE];
335 struct i596_tbd tbds[TX_RING_SIZE];
336 int next_tx_cmd;
337 spinlock_t lock;
338 };
339
340 static char init_setup[] =
341 {
342 0x8E, /* length, prefetch on */
343 0xC8, /* fifo to 8, monitor off */
344 #ifdef CONFIG_VME
345 0xc0, /* don't save bad frames */
346 #else
347 0x80, /* don't save bad frames */
348 #endif
349 0x2E, /* No source address insertion, 8 byte preamble */
350 0x00, /* priority and backoff defaults */
351 0x60, /* interframe spacing */
352 0x00, /* slot time LSB */
353 0xf2, /* slot time and retries */
354 0x00, /* promiscuous mode */
355 0x00, /* collision detect */
356 0x40, /* minimum frame length */
357 0xff,
358 0x00,
359 0x7f /* *multi IA */ };
360
361 static int i596_open(struct net_device *dev);
362 static netdev_tx_t i596_start_xmit(struct sk_buff *skb, struct net_device *dev);
363 static irqreturn_t i596_interrupt(int irq, void *dev_id);
364 static int i596_close(struct net_device *dev);
365 static void i596_add_cmd(struct net_device *dev, struct i596_cmd *cmd);
366 static void i596_tx_timeout (struct net_device *dev);
367 static void print_eth(unsigned char *buf, char *str);
368 static void set_multicast_list(struct net_device *dev);
369
370 static int rx_ring_size = RX_RING_SIZE;
371 static int ticks_limit = 25;
372 static int max_cmd_backlog = TX_RING_SIZE-1;
373
374
375 static inline void CA(struct net_device *dev)
376 {
377 #ifdef ENABLE_MVME16x_NET
378 if (MACH_IS_MVME16x) {
379 ((struct i596_reg *) dev->base_addr)->ca = 1;
380 }
381 #endif
382 #ifdef ENABLE_BVME6000_NET
383 if (MACH_IS_BVME6000) {
384 volatile u32 i;
385
386 i = *(volatile u32 *) (dev->base_addr);
387 }
388 #endif
389 }
390
391
392 static inline void MPU_PORT(struct net_device *dev, int c, volatile void *x)
393 {
394 #ifdef ENABLE_MVME16x_NET
395 if (MACH_IS_MVME16x) {
396 struct i596_reg *p = (struct i596_reg *) (dev->base_addr);
397 p->porthi = ((c) | (u32) (x)) & 0xffff;
398 p->portlo = ((c) | (u32) (x)) >> 16;
399 }
400 #endif
401 #ifdef ENABLE_BVME6000_NET
402 if (MACH_IS_BVME6000) {
403 u32 v = (u32) (c) | (u32) (x);
404 v = ((u32) (v) << 16) | ((u32) (v) >> 16);
405 *(volatile u32 *) dev->base_addr = v;
406 udelay(1);
407 *(volatile u32 *) dev->base_addr = v;
408 }
409 #endif
410 }
411
412
413 static inline int wait_istat(struct net_device *dev, struct i596_private *lp, int delcnt, char *str)
414 {
415 while (--delcnt && lp->iscp.stat)
416 udelay(10);
417 if (!delcnt) {
418 printk(KERN_ERR "%s: %s, status %4.4x, cmd %4.4x.\n",
419 dev->name, str, lp->scb.status, lp->scb.command);
420 return -1;
421 }
422 else
423 return 0;
424 }
425
426
427 static inline int wait_cmd(struct net_device *dev, struct i596_private *lp, int delcnt, char *str)
428 {
429 while (--delcnt && lp->scb.command)
430 udelay(10);
431 if (!delcnt) {
432 printk(KERN_ERR "%s: %s, status %4.4x, cmd %4.4x.\n",
433 dev->name, str, lp->scb.status, lp->scb.command);
434 return -1;
435 }
436 else
437 return 0;
438 }
439
440
441 static inline int wait_cfg(struct net_device *dev, struct i596_cmd *cmd, int delcnt, char *str)
442 {
443 volatile struct i596_cmd *c = cmd;
444
445 while (--delcnt && c->command)
446 udelay(10);
447 if (!delcnt) {
448 printk(KERN_ERR "%s: %s.\n", dev->name, str);
449 return -1;
450 }
451 else
452 return 0;
453 }
454
455
456 static void i596_display_data(struct net_device *dev)
457 {
458 struct i596_private *lp = dev->ml_priv;
459 struct i596_cmd *cmd;
460 struct i596_rfd *rfd;
461 struct i596_rbd *rbd;
462
463 printk(KERN_ERR "lp and scp at %p, .sysbus = %08lx, .iscp = %p\n",
464 &lp->scp, lp->scp.sysbus, lp->scp.iscp);
465 printk(KERN_ERR "iscp at %p, iscp.stat = %08lx, .scb = %p\n",
466 &lp->iscp, lp->iscp.stat, lp->iscp.scb);
467 printk(KERN_ERR "scb at %p, scb.status = %04x, .command = %04x,"
468 " .cmd = %p, .rfd = %p\n",
469 &lp->scb, lp->scb.status, lp->scb.command,
470 lp->scb.cmd, lp->scb.rfd);
471 printk(KERN_ERR " errors: crc %lx, align %lx, resource %lx,"
472 " over %lx, rcvdt %lx, short %lx\n",
473 lp->scb.crc_err, lp->scb.align_err, lp->scb.resource_err,
474 lp->scb.over_err, lp->scb.rcvdt_err, lp->scb.short_err);
475 cmd = lp->cmd_head;
476 while (cmd != I596_NULL) {
477 printk(KERN_ERR "cmd at %p, .status = %04x, .command = %04x, .b_next = %p\n",
478 cmd, cmd->status, cmd->command, cmd->b_next);
479 cmd = cmd->v_next;
480 }
481 rfd = lp->rfd_head;
482 printk(KERN_ERR "rfd_head = %p\n", rfd);
483 do {
484 printk(KERN_ERR " %p .stat %04x, .cmd %04x, b_next %p, rbd %p,"
485 " count %04x\n",
486 rfd, rfd->stat, rfd->cmd, rfd->b_next, rfd->rbd,
487 rfd->count);
488 rfd = rfd->v_next;
489 } while (rfd != lp->rfd_head);
490 rbd = lp->rbd_head;
491 printk(KERN_ERR "rbd_head = %p\n", rbd);
492 do {
493 printk(KERN_ERR " %p .count %04x, b_next %p, b_data %p, size %04x\n",
494 rbd, rbd->count, rbd->b_next, rbd->b_data, rbd->size);
495 rbd = rbd->v_next;
496 } while (rbd != lp->rbd_head);
497 }
498
499
500 #if defined(ENABLE_MVME16x_NET) || defined(ENABLE_BVME6000_NET)
501 static irqreturn_t i596_error(int irq, void *dev_id)
502 {
503 struct net_device *dev = dev_id;
504 #ifdef ENABLE_MVME16x_NET
505 if (MACH_IS_MVME16x) {
506 volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000;
507
508 pcc2[0x28] = 1;
509 pcc2[0x2b] = 0x1d;
510 }
511 #endif
512 #ifdef ENABLE_BVME6000_NET
513 if (MACH_IS_BVME6000) {
514 volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG;
515
516 *ethirq = 1;
517 *ethirq = 3;
518 }
519 #endif
520 printk(KERN_ERR "%s: Error interrupt\n", dev->name);
521 i596_display_data(dev);
522 return IRQ_HANDLED;
523 }
524 #endif
525
526 static inline void remove_rx_bufs(struct net_device *dev)
527 {
528 struct i596_private *lp = dev->ml_priv;
529 struct i596_rbd *rbd;
530 int i;
531
532 for (i = 0, rbd = lp->rbds; i < rx_ring_size; i++, rbd++) {
533 if (rbd->skb == NULL)
534 break;
535 dev_kfree_skb(rbd->skb);
536 rbd->skb = NULL;
537 }
538 }
539
540 static inline int init_rx_bufs(struct net_device *dev)
541 {
542 struct i596_private *lp = dev->ml_priv;
543 int i;
544 struct i596_rfd *rfd;
545 struct i596_rbd *rbd;
546
547 /* First build the Receive Buffer Descriptor List */
548
549 for (i = 0, rbd = lp->rbds; i < rx_ring_size; i++, rbd++) {
550 struct sk_buff *skb = netdev_alloc_skb(dev, PKT_BUF_SZ);
551
552 if (skb == NULL) {
553 remove_rx_bufs(dev);
554 return -ENOMEM;
555 }
556
557 rbd->v_next = rbd+1;
558 rbd->b_next = WSWAPrbd(virt_to_bus(rbd+1));
559 rbd->b_addr = WSWAPrbd(virt_to_bus(rbd));
560 rbd->skb = skb;
561 rbd->v_data = skb->data;
562 rbd->b_data = WSWAPchar(virt_to_bus(skb->data));
563 rbd->size = PKT_BUF_SZ;
564 #ifdef __mc68000__
565 cache_clear(virt_to_phys(skb->data), PKT_BUF_SZ);
566 #endif
567 }
568 lp->rbd_head = lp->rbds;
569 rbd = lp->rbds + rx_ring_size - 1;
570 rbd->v_next = lp->rbds;
571 rbd->b_next = WSWAPrbd(virt_to_bus(lp->rbds));
572
573 /* Now build the Receive Frame Descriptor List */
574
575 for (i = 0, rfd = lp->rfds; i < rx_ring_size; i++, rfd++) {
576 rfd->rbd = I596_NULL;
577 rfd->v_next = rfd+1;
578 rfd->v_prev = rfd-1;
579 rfd->b_next = WSWAPrfd(virt_to_bus(rfd+1));
580 rfd->cmd = CMD_FLEX;
581 }
582 lp->rfd_head = lp->rfds;
583 lp->scb.rfd = WSWAPrfd(virt_to_bus(lp->rfds));
584 rfd = lp->rfds;
585 rfd->rbd = lp->rbd_head;
586 rfd->v_prev = lp->rfds + rx_ring_size - 1;
587 rfd = lp->rfds + rx_ring_size - 1;
588 rfd->v_next = lp->rfds;
589 rfd->b_next = WSWAPrfd(virt_to_bus(lp->rfds));
590 rfd->cmd = CMD_EOL|CMD_FLEX;
591
592 return 0;
593 }
594
595
596 static void rebuild_rx_bufs(struct net_device *dev)
597 {
598 struct i596_private *lp = dev->ml_priv;
599 int i;
600
601 /* Ensure rx frame/buffer descriptors are tidy */
602
603 for (i = 0; i < rx_ring_size; i++) {
604 lp->rfds[i].rbd = I596_NULL;
605 lp->rfds[i].cmd = CMD_FLEX;
606 }
607 lp->rfds[rx_ring_size-1].cmd = CMD_EOL|CMD_FLEX;
608 lp->rfd_head = lp->rfds;
609 lp->scb.rfd = WSWAPrfd(virt_to_bus(lp->rfds));
610 lp->rbd_head = lp->rbds;
611 lp->rfds[0].rbd = WSWAPrbd(virt_to_bus(lp->rbds));
612 }
613
614
615 static int init_i596_mem(struct net_device *dev)
616 {
617 struct i596_private *lp = dev->ml_priv;
618 unsigned long flags;
619
620 MPU_PORT(dev, PORT_RESET, NULL);
621
622 udelay(100); /* Wait 100us - seems to help */
623
624 #if defined(ENABLE_MVME16x_NET) || defined(ENABLE_BVME6000_NET)
625 #ifdef ENABLE_MVME16x_NET
626 if (MACH_IS_MVME16x) {
627 volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000;
628
629 /* Disable all ints for now */
630 pcc2[0x28] = 1;
631 pcc2[0x2a] = 0x48;
632 /* Following disables snooping. Snooping is not required
633 * as we make appropriate use of non-cached pages for
634 * shared data, and cache_push/cache_clear.
635 */
636 pcc2[0x2b] = 0x08;
637 }
638 #endif
639 #ifdef ENABLE_BVME6000_NET
640 if (MACH_IS_BVME6000) {
641 volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG;
642
643 *ethirq = 1;
644 }
645 #endif
646
647 /* change the scp address */
648
649 MPU_PORT(dev, PORT_ALTSCP, (void *)virt_to_bus((void *)&lp->scp));
650
651 #endif
652
653 lp->last_cmd = jiffies;
654
655 #ifdef ENABLE_MVME16x_NET
656 if (MACH_IS_MVME16x)
657 lp->scp.sysbus = 0x00000054;
658 #endif
659 #ifdef ENABLE_BVME6000_NET
660 if (MACH_IS_BVME6000)
661 lp->scp.sysbus = 0x0000004c;
662 #endif
663
664 lp->scp.iscp = WSWAPiscp(virt_to_bus((void *)&lp->iscp));
665 lp->iscp.scb = WSWAPscb(virt_to_bus((void *)&lp->scb));
666 lp->iscp.stat = ISCP_BUSY;
667 lp->cmd_backlog = 0;
668
669 lp->cmd_head = lp->scb.cmd = I596_NULL;
670
671 #ifdef ENABLE_BVME6000_NET
672 if (MACH_IS_BVME6000) {
673 lp->scb.t_on = 7 * 25;
674 lp->scb.t_off = 1 * 25;
675 }
676 #endif
677
678 DEB(DEB_INIT,printk(KERN_DEBUG "%s: starting i82596.\n", dev->name));
679
680 CA(dev);
681
682 if (wait_istat(dev,lp,1000,"initialization timed out"))
683 goto failed;
684 DEB(DEB_INIT,printk(KERN_DEBUG "%s: i82596 initialization successful\n", dev->name));
685
686 /* Ensure rx frame/buffer descriptors are tidy */
687 rebuild_rx_bufs(dev);
688 lp->scb.command = 0;
689
690 #ifdef ENABLE_MVME16x_NET
691 if (MACH_IS_MVME16x) {
692 volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000;
693
694 /* Enable ints, etc. now */
695 pcc2[0x2a] = 0x55; /* Edge sensitive */
696 pcc2[0x2b] = 0x15;
697 }
698 #endif
699 #ifdef ENABLE_BVME6000_NET
700 if (MACH_IS_BVME6000) {
701 volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG;
702
703 *ethirq = 3;
704 }
705 #endif
706
707
708 DEB(DEB_INIT,printk(KERN_DEBUG "%s: queuing CmdConfigure\n", dev->name));
709 memcpy(lp->cf_cmd.i596_config, init_setup, 14);
710 lp->cf_cmd.cmd.command = CmdConfigure;
711 i596_add_cmd(dev, &lp->cf_cmd.cmd);
712
713 DEB(DEB_INIT,printk(KERN_DEBUG "%s: queuing CmdSASetup\n", dev->name));
714 memcpy(lp->sa_cmd.eth_addr, dev->dev_addr, 6);
715 lp->sa_cmd.cmd.command = CmdSASetup;
716 i596_add_cmd(dev, &lp->sa_cmd.cmd);
717
718 DEB(DEB_INIT,printk(KERN_DEBUG "%s: queuing CmdTDR\n", dev->name));
719 lp->tdr_cmd.cmd.command = CmdTDR;
720 i596_add_cmd(dev, &lp->tdr_cmd.cmd);
721
722 spin_lock_irqsave (&lp->lock, flags);
723
724 if (wait_cmd(dev,lp,1000,"timed out waiting to issue RX_START")) {
725 spin_unlock_irqrestore (&lp->lock, flags);
726 goto failed;
727 }
728 DEB(DEB_INIT,printk(KERN_DEBUG "%s: Issuing RX_START\n", dev->name));
729 lp->scb.command = RX_START;
730 CA(dev);
731
732 spin_unlock_irqrestore (&lp->lock, flags);
733
734 if (wait_cmd(dev,lp,1000,"RX_START not processed"))
735 goto failed;
736 DEB(DEB_INIT,printk(KERN_DEBUG "%s: Receive unit started OK\n", dev->name));
737 return 0;
738
739 failed:
740 printk(KERN_CRIT "%s: Failed to initialise 82596\n", dev->name);
741 MPU_PORT(dev, PORT_RESET, NULL);
742 return -1;
743 }
744
745 static inline int i596_rx(struct net_device *dev)
746 {
747 struct i596_private *lp = dev->ml_priv;
748 struct i596_rfd *rfd;
749 struct i596_rbd *rbd;
750 int frames = 0;
751
752 DEB(DEB_RXFRAME,printk(KERN_DEBUG "i596_rx(), rfd_head %p, rbd_head %p\n",
753 lp->rfd_head, lp->rbd_head));
754
755 rfd = lp->rfd_head; /* Ref next frame to check */
756
757 while ((rfd->stat) & STAT_C) { /* Loop while complete frames */
758 if (rfd->rbd == I596_NULL)
759 rbd = I596_NULL;
760 else if (rfd->rbd == lp->rbd_head->b_addr)
761 rbd = lp->rbd_head;
762 else {
763 printk(KERN_CRIT "%s: rbd chain broken!\n", dev->name);
764 /* XXX Now what? */
765 rbd = I596_NULL;
766 }
767 DEB(DEB_RXFRAME, printk(KERN_DEBUG " rfd %p, rfd.rbd %p, rfd.stat %04x\n",
768 rfd, rfd->rbd, rfd->stat));
769
770 if (rbd != I596_NULL && ((rfd->stat) & STAT_OK)) {
771 /* a good frame */
772 int pkt_len = rbd->count & 0x3fff;
773 struct sk_buff *skb = rbd->skb;
774 int rx_in_place = 0;
775
776 DEB(DEB_RXADDR,print_eth(rbd->v_data, "received"));
777 frames++;
778
779 /* Check if the packet is long enough to just accept
780 * without copying to a properly sized skbuff.
781 */
782
783 if (pkt_len > rx_copybreak) {
784 struct sk_buff *newskb;
785
786 /* Get fresh skbuff to replace filled one. */
787 newskb = netdev_alloc_skb(dev, PKT_BUF_SZ);
788 if (newskb == NULL) {
789 skb = NULL; /* drop pkt */
790 goto memory_squeeze;
791 }
792 /* Pass up the skb already on the Rx ring. */
793 skb_put(skb, pkt_len);
794 rx_in_place = 1;
795 rbd->skb = newskb;
796 rbd->v_data = newskb->data;
797 rbd->b_data = WSWAPchar(virt_to_bus(newskb->data));
798 #ifdef __mc68000__
799 cache_clear(virt_to_phys(newskb->data), PKT_BUF_SZ);
800 #endif
801 }
802 else
803 skb = netdev_alloc_skb(dev, pkt_len + 2);
804 memory_squeeze:
805 if (skb == NULL) {
806 /* XXX tulip.c can defer packets here!! */
807 printk(KERN_WARNING "%s: i596_rx Memory squeeze, dropping packet.\n", dev->name);
808 dev->stats.rx_dropped++;
809 }
810 else {
811 if (!rx_in_place) {
812 /* 16 byte align the data fields */
813 skb_reserve(skb, 2);
814 memcpy(skb_put(skb,pkt_len), rbd->v_data, pkt_len);
815 }
816 skb->protocol=eth_type_trans(skb,dev);
817 skb->len = pkt_len;
818 #ifdef __mc68000__
819 cache_clear(virt_to_phys(rbd->skb->data),
820 pkt_len);
821 #endif
822 netif_rx(skb);
823 dev->stats.rx_packets++;
824 dev->stats.rx_bytes+=pkt_len;
825 }
826 }
827 else {
828 DEB(DEB_ERRORS, printk(KERN_DEBUG "%s: Error, rfd.stat = 0x%04x\n",
829 dev->name, rfd->stat));
830 dev->stats.rx_errors++;
831 if ((rfd->stat) & 0x0001)
832 dev->stats.collisions++;
833 if ((rfd->stat) & 0x0080)
834 dev->stats.rx_length_errors++;
835 if ((rfd->stat) & 0x0100)
836 dev->stats.rx_over_errors++;
837 if ((rfd->stat) & 0x0200)
838 dev->stats.rx_fifo_errors++;
839 if ((rfd->stat) & 0x0400)
840 dev->stats.rx_frame_errors++;
841 if ((rfd->stat) & 0x0800)
842 dev->stats.rx_crc_errors++;
843 if ((rfd->stat) & 0x1000)
844 dev->stats.rx_length_errors++;
845 }
846
847 /* Clear the buffer descriptor count and EOF + F flags */
848
849 if (rbd != I596_NULL && (rbd->count & 0x4000)) {
850 rbd->count = 0;
851 lp->rbd_head = rbd->v_next;
852 }
853
854 /* Tidy the frame descriptor, marking it as end of list */
855
856 rfd->rbd = I596_NULL;
857 rfd->stat = 0;
858 rfd->cmd = CMD_EOL|CMD_FLEX;
859 rfd->count = 0;
860
861 /* Remove end-of-list from old end descriptor */
862
863 rfd->v_prev->cmd = CMD_FLEX;
864
865 /* Update record of next frame descriptor to process */
866
867 lp->scb.rfd = rfd->b_next;
868 lp->rfd_head = rfd->v_next;
869 rfd = lp->rfd_head;
870 }
871
872 DEB(DEB_RXFRAME,printk(KERN_DEBUG "frames %d\n", frames));
873
874 return 0;
875 }
876
877
878 static void i596_cleanup_cmd(struct net_device *dev, struct i596_private *lp)
879 {
880 struct i596_cmd *ptr;
881
882 while (lp->cmd_head != I596_NULL) {
883 ptr = lp->cmd_head;
884 lp->cmd_head = ptr->v_next;
885 lp->cmd_backlog--;
886
887 switch ((ptr->command) & 0x7) {
888 case CmdTx:
889 {
890 struct tx_cmd *tx_cmd = (struct tx_cmd *) ptr;
891 struct sk_buff *skb = tx_cmd->skb;
892
893 dev_kfree_skb(skb);
894
895 dev->stats.tx_errors++;
896 dev->stats.tx_aborted_errors++;
897
898 ptr->v_next = ptr->b_next = I596_NULL;
899 tx_cmd->cmd.command = 0; /* Mark as free */
900 break;
901 }
902 default:
903 ptr->v_next = ptr->b_next = I596_NULL;
904 }
905 }
906
907 wait_cmd(dev,lp,100,"i596_cleanup_cmd timed out");
908 lp->scb.cmd = I596_NULL;
909 }
910
911 static void i596_reset(struct net_device *dev, struct i596_private *lp,
912 int ioaddr)
913 {
914 unsigned long flags;
915
916 DEB(DEB_RESET,printk(KERN_DEBUG "i596_reset\n"));
917
918 spin_lock_irqsave (&lp->lock, flags);
919
920 wait_cmd(dev,lp,100,"i596_reset timed out");
921
922 netif_stop_queue(dev);
923
924 lp->scb.command = CUC_ABORT | RX_ABORT;
925 CA(dev);
926
927 /* wait for shutdown */
928 wait_cmd(dev,lp,1000,"i596_reset 2 timed out");
929 spin_unlock_irqrestore (&lp->lock, flags);
930
931 i596_cleanup_cmd(dev,lp);
932 i596_rx(dev);
933
934 netif_start_queue(dev);
935 init_i596_mem(dev);
936 }
937
938 static void i596_add_cmd(struct net_device *dev, struct i596_cmd *cmd)
939 {
940 struct i596_private *lp = dev->ml_priv;
941 int ioaddr = dev->base_addr;
942 unsigned long flags;
943
944 DEB(DEB_ADDCMD,printk(KERN_DEBUG "i596_add_cmd\n"));
945
946 cmd->status = 0;
947 cmd->command |= (CMD_EOL | CMD_INTR);
948 cmd->v_next = cmd->b_next = I596_NULL;
949
950 spin_lock_irqsave (&lp->lock, flags);
951
952 if (lp->cmd_head != I596_NULL) {
953 lp->cmd_tail->v_next = cmd;
954 lp->cmd_tail->b_next = WSWAPcmd(virt_to_bus(&cmd->status));
955 } else {
956 lp->cmd_head = cmd;
957 wait_cmd(dev,lp,100,"i596_add_cmd timed out");
958 lp->scb.cmd = WSWAPcmd(virt_to_bus(&cmd->status));
959 lp->scb.command = CUC_START;
960 CA(dev);
961 }
962 lp->cmd_tail = cmd;
963 lp->cmd_backlog++;
964
965 spin_unlock_irqrestore (&lp->lock, flags);
966
967 if (lp->cmd_backlog > max_cmd_backlog) {
968 unsigned long tickssofar = jiffies - lp->last_cmd;
969
970 if (tickssofar < ticks_limit)
971 return;
972
973 printk(KERN_NOTICE "%s: command unit timed out, status resetting.\n", dev->name);
974
975 i596_reset(dev, lp, ioaddr);
976 }
977 }
978
979 static int i596_open(struct net_device *dev)
980 {
981 int res = 0;
982
983 DEB(DEB_OPEN,printk(KERN_DEBUG "%s: i596_open() irq %d.\n", dev->name, dev->irq));
984
985 if (request_irq(dev->irq, i596_interrupt, 0, "i82596", dev)) {
986 printk(KERN_ERR "%s: IRQ %d not free\n", dev->name, dev->irq);
987 return -EAGAIN;
988 }
989 #ifdef ENABLE_MVME16x_NET
990 if (MACH_IS_MVME16x) {
991 if (request_irq(0x56, i596_error, 0, "i82596_error", dev)) {
992 res = -EAGAIN;
993 goto err_irq_dev;
994 }
995 }
996 #endif
997 res = init_rx_bufs(dev);
998 if (res)
999 goto err_irq_56;
1000
1001 netif_start_queue(dev);
1002
1003 if (init_i596_mem(dev)) {
1004 res = -EAGAIN;
1005 goto err_queue;
1006 }
1007
1008 return 0;
1009
1010 err_queue:
1011 netif_stop_queue(dev);
1012 remove_rx_bufs(dev);
1013 err_irq_56:
1014 #ifdef ENABLE_MVME16x_NET
1015 free_irq(0x56, dev);
1016 err_irq_dev:
1017 #endif
1018 free_irq(dev->irq, dev);
1019
1020 return res;
1021 }
1022
1023 static void i596_tx_timeout (struct net_device *dev)
1024 {
1025 struct i596_private *lp = dev->ml_priv;
1026 int ioaddr = dev->base_addr;
1027
1028 /* Transmitter timeout, serious problems. */
1029 DEB(DEB_ERRORS,printk(KERN_ERR "%s: transmit timed out, status resetting.\n",
1030 dev->name));
1031
1032 dev->stats.tx_errors++;
1033
1034 /* Try to restart the adaptor */
1035 if (lp->last_restart == dev->stats.tx_packets) {
1036 DEB(DEB_ERRORS,printk(KERN_ERR "Resetting board.\n"));
1037 /* Shutdown and restart */
1038 i596_reset (dev, lp, ioaddr);
1039 } else {
1040 /* Issue a channel attention signal */
1041 DEB(DEB_ERRORS,printk(KERN_ERR "Kicking board.\n"));
1042 lp->scb.command = CUC_START | RX_START;
1043 CA (dev);
1044 lp->last_restart = dev->stats.tx_packets;
1045 }
1046
1047 dev->trans_start = jiffies; /* prevent tx timeout */
1048 netif_wake_queue (dev);
1049 }
1050
1051 static netdev_tx_t i596_start_xmit(struct sk_buff *skb, struct net_device *dev)
1052 {
1053 struct i596_private *lp = dev->ml_priv;
1054 struct tx_cmd *tx_cmd;
1055 struct i596_tbd *tbd;
1056 short length = skb->len;
1057
1058 DEB(DEB_STARTTX,printk(KERN_DEBUG "%s: i596_start_xmit(%x,%p) called\n",
1059 dev->name, skb->len, skb->data));
1060
1061 if (skb->len < ETH_ZLEN) {
1062 if (skb_padto(skb, ETH_ZLEN))
1063 return NETDEV_TX_OK;
1064 length = ETH_ZLEN;
1065 }
1066 netif_stop_queue(dev);
1067
1068 tx_cmd = lp->tx_cmds + lp->next_tx_cmd;
1069 tbd = lp->tbds + lp->next_tx_cmd;
1070
1071 if (tx_cmd->cmd.command) {
1072 printk(KERN_NOTICE "%s: xmit ring full, dropping packet.\n",
1073 dev->name);
1074 dev->stats.tx_dropped++;
1075
1076 dev_kfree_skb(skb);
1077 } else {
1078 if (++lp->next_tx_cmd == TX_RING_SIZE)
1079 lp->next_tx_cmd = 0;
1080 tx_cmd->tbd = WSWAPtbd(virt_to_bus(tbd));
1081 tbd->next = I596_NULL;
1082
1083 tx_cmd->cmd.command = CMD_FLEX | CmdTx;
1084 tx_cmd->skb = skb;
1085
1086 tx_cmd->pad = 0;
1087 tx_cmd->size = 0;
1088 tbd->pad = 0;
1089 tbd->size = EOF | length;
1090
1091 tbd->data = WSWAPchar(virt_to_bus(skb->data));
1092
1093 #ifdef __mc68000__
1094 cache_push(virt_to_phys(skb->data), length);
1095 #endif
1096 DEB(DEB_TXADDR,print_eth(skb->data, "tx-queued"));
1097 i596_add_cmd(dev, &tx_cmd->cmd);
1098
1099 dev->stats.tx_packets++;
1100 dev->stats.tx_bytes += length;
1101 }
1102
1103 netif_start_queue(dev);
1104
1105 return NETDEV_TX_OK;
1106 }
1107
1108 static void print_eth(unsigned char *add, char *str)
1109 {
1110 printk(KERN_DEBUG "i596 0x%p, %pM --> %pM %02X%02X, %s\n",
1111 add, add + 6, add, add[12], add[13], str);
1112 }
1113
1114 static int io = 0x300;
1115 static int irq = 10;
1116
1117 static const struct net_device_ops i596_netdev_ops = {
1118 .ndo_open = i596_open,
1119 .ndo_stop = i596_close,
1120 .ndo_start_xmit = i596_start_xmit,
1121 .ndo_set_rx_mode = set_multicast_list,
1122 .ndo_tx_timeout = i596_tx_timeout,
1123 .ndo_change_mtu = eth_change_mtu,
1124 .ndo_set_mac_address = eth_mac_addr,
1125 .ndo_validate_addr = eth_validate_addr,
1126 };
1127
1128 struct net_device * __init i82596_probe(int unit)
1129 {
1130 struct net_device *dev;
1131 int i;
1132 struct i596_private *lp;
1133 char eth_addr[8];
1134 static int probed;
1135 int err;
1136
1137 if (probed)
1138 return ERR_PTR(-ENODEV);
1139 probed++;
1140
1141 dev = alloc_etherdev(0);
1142 if (!dev)
1143 return ERR_PTR(-ENOMEM);
1144
1145 if (unit >= 0) {
1146 sprintf(dev->name, "eth%d", unit);
1147 netdev_boot_setup_check(dev);
1148 } else {
1149 dev->base_addr = io;
1150 dev->irq = irq;
1151 }
1152
1153 #ifdef ENABLE_MVME16x_NET
1154 if (MACH_IS_MVME16x) {
1155 if (mvme16x_config & MVME16x_CONFIG_NO_ETHERNET) {
1156 printk(KERN_NOTICE "Ethernet probe disabled - chip not present\n");
1157 err = -ENODEV;
1158 goto out;
1159 }
1160 memcpy(eth_addr, (void *) 0xfffc1f2c, 6); /* YUCK! Get addr from NOVRAM */
1161 dev->base_addr = MVME_I596_BASE;
1162 dev->irq = (unsigned) MVME16x_IRQ_I596;
1163 goto found;
1164 }
1165 #endif
1166 #ifdef ENABLE_BVME6000_NET
1167 if (MACH_IS_BVME6000) {
1168 volatile unsigned char *rtc = (unsigned char *) BVME_RTC_BASE;
1169 unsigned char msr = rtc[3];
1170 int i;
1171
1172 rtc[3] |= 0x80;
1173 for (i = 0; i < 6; i++)
1174 eth_addr[i] = rtc[i * 4 + 7]; /* Stored in RTC RAM at offset 1 */
1175 rtc[3] = msr;
1176 dev->base_addr = BVME_I596_BASE;
1177 dev->irq = (unsigned) BVME_IRQ_I596;
1178 goto found;
1179 }
1180 #endif
1181 err = -ENODEV;
1182 goto out;
1183
1184 found:
1185 dev->mem_start = (int)__get_free_pages(GFP_ATOMIC, 0);
1186 if (!dev->mem_start) {
1187 err = -ENOMEM;
1188 goto out1;
1189 }
1190
1191 DEB(DEB_PROBE,printk(KERN_INFO "%s: 82596 at %#3lx,", dev->name, dev->base_addr));
1192
1193 for (i = 0; i < 6; i++)
1194 DEB(DEB_PROBE,printk(" %2.2X", dev->dev_addr[i] = eth_addr[i]));
1195
1196 DEB(DEB_PROBE,printk(" IRQ %d.\n", dev->irq));
1197
1198 DEB(DEB_PROBE,printk(KERN_INFO "%s", version));
1199
1200 /* The 82596-specific entries in the device structure. */
1201 dev->netdev_ops = &i596_netdev_ops;
1202 dev->watchdog_timeo = TX_TIMEOUT;
1203
1204 dev->ml_priv = (void *)(dev->mem_start);
1205
1206 lp = dev->ml_priv;
1207 DEB(DEB_INIT,printk(KERN_DEBUG "%s: lp at 0x%08lx (%zd bytes), "
1208 "lp->scb at 0x%08lx\n",
1209 dev->name, (unsigned long)lp,
1210 sizeof(struct i596_private), (unsigned long)&lp->scb));
1211 memset((void *) lp, 0, sizeof(struct i596_private));
1212
1213 #ifdef __mc68000__
1214 cache_push(virt_to_phys((void *)(dev->mem_start)), 4096);
1215 cache_clear(virt_to_phys((void *)(dev->mem_start)), 4096);
1216 kernel_set_cachemode((void *)(dev->mem_start), 4096, IOMAP_NOCACHE_SER);
1217 #endif
1218 lp->scb.command = 0;
1219 lp->scb.cmd = I596_NULL;
1220 lp->scb.rfd = I596_NULL;
1221 spin_lock_init(&lp->lock);
1222
1223 err = register_netdev(dev);
1224 if (err)
1225 goto out2;
1226 return dev;
1227 out2:
1228 #ifdef __mc68000__
1229 /* XXX This assumes default cache mode to be IOMAP_FULL_CACHING,
1230 * XXX which may be invalid (CONFIG_060_WRITETHROUGH)
1231 */
1232 kernel_set_cachemode((void *)(dev->mem_start), 4096,
1233 IOMAP_FULL_CACHING);
1234 #endif
1235 free_page ((u32)(dev->mem_start));
1236 out1:
1237 out:
1238 free_netdev(dev);
1239 return ERR_PTR(err);
1240 }
1241
1242 static irqreturn_t i596_interrupt(int irq, void *dev_id)
1243 {
1244 struct net_device *dev = dev_id;
1245 struct i596_private *lp;
1246 short ioaddr;
1247 unsigned short status, ack_cmd = 0;
1248 int handled = 0;
1249
1250 #ifdef ENABLE_BVME6000_NET
1251 if (MACH_IS_BVME6000) {
1252 if (*(char *) BVME_LOCAL_IRQ_STAT & BVME_ETHERR) {
1253 i596_error(irq, dev_id);
1254 return IRQ_HANDLED;
1255 }
1256 }
1257 #endif
1258 if (dev == NULL) {
1259 printk(KERN_ERR "i596_interrupt(): irq %d for unknown device.\n", irq);
1260 return IRQ_NONE;
1261 }
1262
1263 ioaddr = dev->base_addr;
1264 lp = dev->ml_priv;
1265
1266 spin_lock (&lp->lock);
1267
1268 wait_cmd(dev,lp,100,"i596 interrupt, timeout");
1269 status = lp->scb.status;
1270
1271 DEB(DEB_INTS,printk(KERN_DEBUG "%s: i596 interrupt, IRQ %d, status %4.4x.\n",
1272 dev->name, irq, status));
1273
1274 ack_cmd = status & 0xf000;
1275
1276 if ((status & 0x8000) || (status & 0x2000)) {
1277 struct i596_cmd *ptr;
1278
1279 handled = 1;
1280 if ((status & 0x8000))
1281 DEB(DEB_INTS,printk(KERN_DEBUG "%s: i596 interrupt completed command.\n", dev->name));
1282 if ((status & 0x2000))
1283 DEB(DEB_INTS,printk(KERN_DEBUG "%s: i596 interrupt command unit inactive %x.\n", dev->name, status & 0x0700));
1284
1285 while ((lp->cmd_head != I596_NULL) && (lp->cmd_head->status & STAT_C)) {
1286 ptr = lp->cmd_head;
1287
1288 DEB(DEB_STATUS,printk(KERN_DEBUG "cmd_head->status = %04x, ->command = %04x\n",
1289 lp->cmd_head->status, lp->cmd_head->command));
1290 lp->cmd_head = ptr->v_next;
1291 lp->cmd_backlog--;
1292
1293 switch ((ptr->command) & 0x7) {
1294 case CmdTx:
1295 {
1296 struct tx_cmd *tx_cmd = (struct tx_cmd *) ptr;
1297 struct sk_buff *skb = tx_cmd->skb;
1298
1299 if ((ptr->status) & STAT_OK) {
1300 DEB(DEB_TXADDR,print_eth(skb->data, "tx-done"));
1301 } else {
1302 dev->stats.tx_errors++;
1303 if ((ptr->status) & 0x0020)
1304 dev->stats.collisions++;
1305 if (!((ptr->status) & 0x0040))
1306 dev->stats.tx_heartbeat_errors++;
1307 if ((ptr->status) & 0x0400)
1308 dev->stats.tx_carrier_errors++;
1309 if ((ptr->status) & 0x0800)
1310 dev->stats.collisions++;
1311 if ((ptr->status) & 0x1000)
1312 dev->stats.tx_aborted_errors++;
1313 }
1314
1315 dev_kfree_skb_irq(skb);
1316
1317 tx_cmd->cmd.command = 0; /* Mark free */
1318 break;
1319 }
1320 case CmdTDR:
1321 {
1322 unsigned short status = ((struct tdr_cmd *)ptr)->status;
1323
1324 if (status & 0x8000) {
1325 DEB(DEB_TDR,printk(KERN_INFO "%s: link ok.\n", dev->name));
1326 } else {
1327 if (status & 0x4000)
1328 printk(KERN_ERR "%s: Transceiver problem.\n", dev->name);
1329 if (status & 0x2000)
1330 printk(KERN_ERR "%s: Termination problem.\n", dev->name);
1331 if (status & 0x1000)
1332 printk(KERN_ERR "%s: Short circuit.\n", dev->name);
1333
1334 DEB(DEB_TDR,printk(KERN_INFO "%s: Time %d.\n", dev->name, status & 0x07ff));
1335 }
1336 break;
1337 }
1338 case CmdConfigure:
1339 case CmdMulticastList:
1340 /* Zap command so set_multicast_list() knows it is free */
1341 ptr->command = 0;
1342 break;
1343 }
1344 ptr->v_next = ptr->b_next = I596_NULL;
1345 lp->last_cmd = jiffies;
1346 }
1347
1348 ptr = lp->cmd_head;
1349 while ((ptr != I596_NULL) && (ptr != lp->cmd_tail)) {
1350 ptr->command &= 0x1fff;
1351 ptr = ptr->v_next;
1352 }
1353
1354 if ((lp->cmd_head != I596_NULL))
1355 ack_cmd |= CUC_START;
1356 lp->scb.cmd = WSWAPcmd(virt_to_bus(&lp->cmd_head->status));
1357 }
1358 if ((status & 0x1000) || (status & 0x4000)) {
1359 if ((status & 0x4000))
1360 DEB(DEB_INTS,printk(KERN_DEBUG "%s: i596 interrupt received a frame.\n", dev->name));
1361 i596_rx(dev);
1362 /* Only RX_START if stopped - RGH 07-07-96 */
1363 if (status & 0x1000) {
1364 if (netif_running(dev)) {
1365 DEB(DEB_ERRORS,printk(KERN_ERR "%s: i596 interrupt receive unit inactive, status 0x%x\n", dev->name, status));
1366 ack_cmd |= RX_START;
1367 dev->stats.rx_errors++;
1368 dev->stats.rx_fifo_errors++;
1369 rebuild_rx_bufs(dev);
1370 }
1371 }
1372 }
1373 wait_cmd(dev,lp,100,"i596 interrupt, timeout");
1374 lp->scb.command = ack_cmd;
1375
1376 #ifdef ENABLE_MVME16x_NET
1377 if (MACH_IS_MVME16x) {
1378 /* Ack the interrupt */
1379
1380 volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000;
1381
1382 pcc2[0x2a] |= 0x08;
1383 }
1384 #endif
1385 #ifdef ENABLE_BVME6000_NET
1386 if (MACH_IS_BVME6000) {
1387 volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG;
1388
1389 *ethirq = 1;
1390 *ethirq = 3;
1391 }
1392 #endif
1393 CA(dev);
1394
1395 DEB(DEB_INTS,printk(KERN_DEBUG "%s: exiting interrupt.\n", dev->name));
1396
1397 spin_unlock (&lp->lock);
1398 return IRQ_RETVAL(handled);
1399 }
1400
1401 static int i596_close(struct net_device *dev)
1402 {
1403 struct i596_private *lp = dev->ml_priv;
1404 unsigned long flags;
1405
1406 netif_stop_queue(dev);
1407
1408 DEB(DEB_INIT,printk(KERN_DEBUG "%s: Shutting down ethercard, status was %4.4x.\n",
1409 dev->name, lp->scb.status));
1410
1411 spin_lock_irqsave(&lp->lock, flags);
1412
1413 wait_cmd(dev,lp,100,"close1 timed out");
1414 lp->scb.command = CUC_ABORT | RX_ABORT;
1415 CA(dev);
1416
1417 wait_cmd(dev,lp,100,"close2 timed out");
1418
1419 spin_unlock_irqrestore(&lp->lock, flags);
1420 DEB(DEB_STRUCT,i596_display_data(dev));
1421 i596_cleanup_cmd(dev,lp);
1422
1423 #ifdef ENABLE_MVME16x_NET
1424 if (MACH_IS_MVME16x) {
1425 volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000;
1426
1427 /* Disable all ints */
1428 pcc2[0x28] = 1;
1429 pcc2[0x2a] = 0x40;
1430 pcc2[0x2b] = 0x40; /* Set snooping bits now! */
1431 }
1432 #endif
1433 #ifdef ENABLE_BVME6000_NET
1434 if (MACH_IS_BVME6000) {
1435 volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG;
1436
1437 *ethirq = 1;
1438 }
1439 #endif
1440
1441 #ifdef ENABLE_MVME16x_NET
1442 free_irq(0x56, dev);
1443 #endif
1444 free_irq(dev->irq, dev);
1445 remove_rx_bufs(dev);
1446
1447 return 0;
1448 }
1449
1450 /*
1451 * Set or clear the multicast filter for this adaptor.
1452 */
1453
1454 static void set_multicast_list(struct net_device *dev)
1455 {
1456 struct i596_private *lp = dev->ml_priv;
1457 int config = 0, cnt;
1458
1459 DEB(DEB_MULTI,printk(KERN_DEBUG "%s: set multicast list, %d entries, promisc %s, allmulti %s\n",
1460 dev->name, netdev_mc_count(dev),
1461 dev->flags & IFF_PROMISC ? "ON" : "OFF",
1462 dev->flags & IFF_ALLMULTI ? "ON" : "OFF"));
1463
1464 if (wait_cfg(dev, &lp->cf_cmd.cmd, 1000, "config change request timed out"))
1465 return;
1466
1467 if ((dev->flags & IFF_PROMISC) && !(lp->cf_cmd.i596_config[8] & 0x01)) {
1468 lp->cf_cmd.i596_config[8] |= 0x01;
1469 config = 1;
1470 }
1471 if (!(dev->flags & IFF_PROMISC) && (lp->cf_cmd.i596_config[8] & 0x01)) {
1472 lp->cf_cmd.i596_config[8] &= ~0x01;
1473 config = 1;
1474 }
1475 if ((dev->flags & IFF_ALLMULTI) && (lp->cf_cmd.i596_config[11] & 0x20)) {
1476 lp->cf_cmd.i596_config[11] &= ~0x20;
1477 config = 1;
1478 }
1479 if (!(dev->flags & IFF_ALLMULTI) && !(lp->cf_cmd.i596_config[11] & 0x20)) {
1480 lp->cf_cmd.i596_config[11] |= 0x20;
1481 config = 1;
1482 }
1483 if (config) {
1484 lp->cf_cmd.cmd.command = CmdConfigure;
1485 i596_add_cmd(dev, &lp->cf_cmd.cmd);
1486 }
1487
1488 cnt = netdev_mc_count(dev);
1489 if (cnt > MAX_MC_CNT)
1490 {
1491 cnt = MAX_MC_CNT;
1492 printk(KERN_ERR "%s: Only %d multicast addresses supported",
1493 dev->name, cnt);
1494 }
1495
1496 if (!netdev_mc_empty(dev)) {
1497 struct netdev_hw_addr *ha;
1498 unsigned char *cp;
1499 struct mc_cmd *cmd;
1500
1501 if (wait_cfg(dev, &lp->mc_cmd.cmd, 1000, "multicast list change request timed out"))
1502 return;
1503 cmd = &lp->mc_cmd;
1504 cmd->cmd.command = CmdMulticastList;
1505 cmd->mc_cnt = cnt * ETH_ALEN;
1506 cp = cmd->mc_addrs;
1507 netdev_for_each_mc_addr(ha, dev) {
1508 if (!cnt--)
1509 break;
1510 memcpy(cp, ha->addr, ETH_ALEN);
1511 if (i596_debug > 1)
1512 DEB(DEB_MULTI,printk(KERN_INFO "%s: Adding address %pM\n",
1513 dev->name, cp));
1514 cp += ETH_ALEN;
1515 }
1516 i596_add_cmd(dev, &cmd->cmd);
1517 }
1518 }
1519
1520 #ifdef MODULE
1521 static struct net_device *dev_82596;
1522
1523 static int debug = -1;
1524 module_param(debug, int, 0);
1525 MODULE_PARM_DESC(debug, "i82596 debug mask");
1526
1527 int __init init_module(void)
1528 {
1529 if (debug >= 0)
1530 i596_debug = debug;
1531 dev_82596 = i82596_probe(-1);
1532 if (IS_ERR(dev_82596))
1533 return PTR_ERR(dev_82596);
1534 return 0;
1535 }
1536
1537 void __exit cleanup_module(void)
1538 {
1539 unregister_netdev(dev_82596);
1540 #ifdef __mc68000__
1541 /* XXX This assumes default cache mode to be IOMAP_FULL_CACHING,
1542 * XXX which may be invalid (CONFIG_060_WRITETHROUGH)
1543 */
1544
1545 kernel_set_cachemode((void *)(dev_82596->mem_start), 4096,
1546 IOMAP_FULL_CACHING);
1547 #endif
1548 free_page ((u32)(dev_82596->mem_start));
1549 free_netdev(dev_82596);
1550 }
1551
1552 #endif /* MODULE */
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