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[mirror_ubuntu-eoan-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 IS_ENABLED(CONFIG_MVME16x_NET)
93 #define ENABLE_MVME16x_NET
94 #endif
95 #if IS_ENABLED(CONFIG_BVME6000_NET)
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, ETH_ALEN);
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 } else {
802 skb = netdev_alloc_skb(dev, pkt_len + 2);
803 }
804 memory_squeeze:
805 if (skb == NULL) {
806 /* XXX tulip.c can defer packets here!! */
807 dev->stats.rx_dropped++;
808 } else {
809 if (!rx_in_place) {
810 /* 16 byte align the data fields */
811 skb_reserve(skb, 2);
812 skb_put_data(skb, rbd->v_data,
813 pkt_len);
814 }
815 skb->protocol=eth_type_trans(skb,dev);
816 skb->len = pkt_len;
817 #ifdef __mc68000__
818 cache_clear(virt_to_phys(rbd->skb->data),
819 pkt_len);
820 #endif
821 netif_rx(skb);
822 dev->stats.rx_packets++;
823 dev->stats.rx_bytes+=pkt_len;
824 }
825 }
826 else {
827 DEB(DEB_ERRORS, printk(KERN_DEBUG "%s: Error, rfd.stat = 0x%04x\n",
828 dev->name, rfd->stat));
829 dev->stats.rx_errors++;
830 if ((rfd->stat) & 0x0001)
831 dev->stats.collisions++;
832 if ((rfd->stat) & 0x0080)
833 dev->stats.rx_length_errors++;
834 if ((rfd->stat) & 0x0100)
835 dev->stats.rx_over_errors++;
836 if ((rfd->stat) & 0x0200)
837 dev->stats.rx_fifo_errors++;
838 if ((rfd->stat) & 0x0400)
839 dev->stats.rx_frame_errors++;
840 if ((rfd->stat) & 0x0800)
841 dev->stats.rx_crc_errors++;
842 if ((rfd->stat) & 0x1000)
843 dev->stats.rx_length_errors++;
844 }
845
846 /* Clear the buffer descriptor count and EOF + F flags */
847
848 if (rbd != I596_NULL && (rbd->count & 0x4000)) {
849 rbd->count = 0;
850 lp->rbd_head = rbd->v_next;
851 }
852
853 /* Tidy the frame descriptor, marking it as end of list */
854
855 rfd->rbd = I596_NULL;
856 rfd->stat = 0;
857 rfd->cmd = CMD_EOL|CMD_FLEX;
858 rfd->count = 0;
859
860 /* Remove end-of-list from old end descriptor */
861
862 rfd->v_prev->cmd = CMD_FLEX;
863
864 /* Update record of next frame descriptor to process */
865
866 lp->scb.rfd = rfd->b_next;
867 lp->rfd_head = rfd->v_next;
868 rfd = lp->rfd_head;
869 }
870
871 DEB(DEB_RXFRAME,printk(KERN_DEBUG "frames %d\n", frames));
872
873 return 0;
874 }
875
876
877 static void i596_cleanup_cmd(struct net_device *dev, struct i596_private *lp)
878 {
879 struct i596_cmd *ptr;
880
881 while (lp->cmd_head != I596_NULL) {
882 ptr = lp->cmd_head;
883 lp->cmd_head = ptr->v_next;
884 lp->cmd_backlog--;
885
886 switch ((ptr->command) & 0x7) {
887 case CmdTx:
888 {
889 struct tx_cmd *tx_cmd = (struct tx_cmd *) ptr;
890 struct sk_buff *skb = tx_cmd->skb;
891
892 dev_kfree_skb(skb);
893
894 dev->stats.tx_errors++;
895 dev->stats.tx_aborted_errors++;
896
897 ptr->v_next = ptr->b_next = I596_NULL;
898 tx_cmd->cmd.command = 0; /* Mark as free */
899 break;
900 }
901 default:
902 ptr->v_next = ptr->b_next = I596_NULL;
903 }
904 }
905
906 wait_cmd(dev,lp,100,"i596_cleanup_cmd timed out");
907 lp->scb.cmd = I596_NULL;
908 }
909
910 static void i596_reset(struct net_device *dev, struct i596_private *lp,
911 int ioaddr)
912 {
913 unsigned long flags;
914
915 DEB(DEB_RESET,printk(KERN_DEBUG "i596_reset\n"));
916
917 spin_lock_irqsave (&lp->lock, flags);
918
919 wait_cmd(dev,lp,100,"i596_reset timed out");
920
921 netif_stop_queue(dev);
922
923 lp->scb.command = CUC_ABORT | RX_ABORT;
924 CA(dev);
925
926 /* wait for shutdown */
927 wait_cmd(dev,lp,1000,"i596_reset 2 timed out");
928 spin_unlock_irqrestore (&lp->lock, flags);
929
930 i596_cleanup_cmd(dev,lp);
931 i596_rx(dev);
932
933 netif_start_queue(dev);
934 init_i596_mem(dev);
935 }
936
937 static void i596_add_cmd(struct net_device *dev, struct i596_cmd *cmd)
938 {
939 struct i596_private *lp = dev->ml_priv;
940 int ioaddr = dev->base_addr;
941 unsigned long flags;
942
943 DEB(DEB_ADDCMD,printk(KERN_DEBUG "i596_add_cmd\n"));
944
945 cmd->status = 0;
946 cmd->command |= (CMD_EOL | CMD_INTR);
947 cmd->v_next = cmd->b_next = I596_NULL;
948
949 spin_lock_irqsave (&lp->lock, flags);
950
951 if (lp->cmd_head != I596_NULL) {
952 lp->cmd_tail->v_next = cmd;
953 lp->cmd_tail->b_next = WSWAPcmd(virt_to_bus(&cmd->status));
954 } else {
955 lp->cmd_head = cmd;
956 wait_cmd(dev,lp,100,"i596_add_cmd timed out");
957 lp->scb.cmd = WSWAPcmd(virt_to_bus(&cmd->status));
958 lp->scb.command = CUC_START;
959 CA(dev);
960 }
961 lp->cmd_tail = cmd;
962 lp->cmd_backlog++;
963
964 spin_unlock_irqrestore (&lp->lock, flags);
965
966 if (lp->cmd_backlog > max_cmd_backlog) {
967 unsigned long tickssofar = jiffies - lp->last_cmd;
968
969 if (tickssofar < ticks_limit)
970 return;
971
972 printk(KERN_NOTICE "%s: command unit timed out, status resetting.\n", dev->name);
973
974 i596_reset(dev, lp, ioaddr);
975 }
976 }
977
978 static int i596_open(struct net_device *dev)
979 {
980 int res = 0;
981
982 DEB(DEB_OPEN,printk(KERN_DEBUG "%s: i596_open() irq %d.\n", dev->name, dev->irq));
983
984 if (request_irq(dev->irq, i596_interrupt, 0, "i82596", dev)) {
985 printk(KERN_ERR "%s: IRQ %d not free\n", dev->name, dev->irq);
986 return -EAGAIN;
987 }
988 #ifdef ENABLE_MVME16x_NET
989 if (MACH_IS_MVME16x) {
990 if (request_irq(0x56, i596_error, 0, "i82596_error", dev)) {
991 res = -EAGAIN;
992 goto err_irq_dev;
993 }
994 }
995 #endif
996 res = init_rx_bufs(dev);
997 if (res)
998 goto err_irq_56;
999
1000 netif_start_queue(dev);
1001
1002 if (init_i596_mem(dev)) {
1003 res = -EAGAIN;
1004 goto err_queue;
1005 }
1006
1007 return 0;
1008
1009 err_queue:
1010 netif_stop_queue(dev);
1011 remove_rx_bufs(dev);
1012 err_irq_56:
1013 #ifdef ENABLE_MVME16x_NET
1014 free_irq(0x56, dev);
1015 err_irq_dev:
1016 #endif
1017 free_irq(dev->irq, dev);
1018
1019 return res;
1020 }
1021
1022 static void i596_tx_timeout (struct net_device *dev)
1023 {
1024 struct i596_private *lp = dev->ml_priv;
1025 int ioaddr = dev->base_addr;
1026
1027 /* Transmitter timeout, serious problems. */
1028 DEB(DEB_ERRORS,printk(KERN_ERR "%s: transmit timed out, status resetting.\n",
1029 dev->name));
1030
1031 dev->stats.tx_errors++;
1032
1033 /* Try to restart the adaptor */
1034 if (lp->last_restart == dev->stats.tx_packets) {
1035 DEB(DEB_ERRORS,printk(KERN_ERR "Resetting board.\n"));
1036 /* Shutdown and restart */
1037 i596_reset (dev, lp, ioaddr);
1038 } else {
1039 /* Issue a channel attention signal */
1040 DEB(DEB_ERRORS,printk(KERN_ERR "Kicking board.\n"));
1041 lp->scb.command = CUC_START | RX_START;
1042 CA (dev);
1043 lp->last_restart = dev->stats.tx_packets;
1044 }
1045
1046 netif_trans_update(dev); /* prevent tx timeout */
1047 netif_wake_queue (dev);
1048 }
1049
1050 static netdev_tx_t i596_start_xmit(struct sk_buff *skb, struct net_device *dev)
1051 {
1052 struct i596_private *lp = dev->ml_priv;
1053 struct tx_cmd *tx_cmd;
1054 struct i596_tbd *tbd;
1055 short length = skb->len;
1056
1057 DEB(DEB_STARTTX,printk(KERN_DEBUG "%s: i596_start_xmit(%x,%p) called\n",
1058 dev->name, skb->len, skb->data));
1059
1060 if (skb->len < ETH_ZLEN) {
1061 if (skb_padto(skb, ETH_ZLEN))
1062 return NETDEV_TX_OK;
1063 length = ETH_ZLEN;
1064 }
1065 netif_stop_queue(dev);
1066
1067 tx_cmd = lp->tx_cmds + lp->next_tx_cmd;
1068 tbd = lp->tbds + lp->next_tx_cmd;
1069
1070 if (tx_cmd->cmd.command) {
1071 printk(KERN_NOTICE "%s: xmit ring full, dropping packet.\n",
1072 dev->name);
1073 dev->stats.tx_dropped++;
1074
1075 dev_kfree_skb(skb);
1076 } else {
1077 if (++lp->next_tx_cmd == TX_RING_SIZE)
1078 lp->next_tx_cmd = 0;
1079 tx_cmd->tbd = WSWAPtbd(virt_to_bus(tbd));
1080 tbd->next = I596_NULL;
1081
1082 tx_cmd->cmd.command = CMD_FLEX | CmdTx;
1083 tx_cmd->skb = skb;
1084
1085 tx_cmd->pad = 0;
1086 tx_cmd->size = 0;
1087 tbd->pad = 0;
1088 tbd->size = EOF | length;
1089
1090 tbd->data = WSWAPchar(virt_to_bus(skb->data));
1091
1092 #ifdef __mc68000__
1093 cache_push(virt_to_phys(skb->data), length);
1094 #endif
1095 DEB(DEB_TXADDR,print_eth(skb->data, "tx-queued"));
1096 i596_add_cmd(dev, &tx_cmd->cmd);
1097
1098 dev->stats.tx_packets++;
1099 dev->stats.tx_bytes += length;
1100 }
1101
1102 netif_start_queue(dev);
1103
1104 return NETDEV_TX_OK;
1105 }
1106
1107 static void print_eth(unsigned char *add, char *str)
1108 {
1109 printk(KERN_DEBUG "i596 0x%p, %pM --> %pM %02X%02X, %s\n",
1110 add, add + 6, add, add[12], add[13], str);
1111 }
1112
1113 static int io = 0x300;
1114 static int irq = 10;
1115
1116 static const struct net_device_ops i596_netdev_ops = {
1117 .ndo_open = i596_open,
1118 .ndo_stop = i596_close,
1119 .ndo_start_xmit = i596_start_xmit,
1120 .ndo_set_rx_mode = set_multicast_list,
1121 .ndo_tx_timeout = i596_tx_timeout,
1122 .ndo_set_mac_address = eth_mac_addr,
1123 .ndo_validate_addr = eth_validate_addr,
1124 };
1125
1126 struct net_device * __init i82596_probe(int unit)
1127 {
1128 struct net_device *dev;
1129 int i;
1130 struct i596_private *lp;
1131 char eth_addr[8];
1132 static int probed;
1133 int err;
1134
1135 if (probed)
1136 return ERR_PTR(-ENODEV);
1137 probed++;
1138
1139 dev = alloc_etherdev(0);
1140 if (!dev)
1141 return ERR_PTR(-ENOMEM);
1142
1143 if (unit >= 0) {
1144 sprintf(dev->name, "eth%d", unit);
1145 netdev_boot_setup_check(dev);
1146 } else {
1147 dev->base_addr = io;
1148 dev->irq = irq;
1149 }
1150
1151 #ifdef ENABLE_MVME16x_NET
1152 if (MACH_IS_MVME16x) {
1153 if (mvme16x_config & MVME16x_CONFIG_NO_ETHERNET) {
1154 printk(KERN_NOTICE "Ethernet probe disabled - chip not present\n");
1155 err = -ENODEV;
1156 goto out;
1157 }
1158 memcpy(eth_addr, (void *) 0xfffc1f2c, ETH_ALEN); /* YUCK! Get addr from NOVRAM */
1159 dev->base_addr = MVME_I596_BASE;
1160 dev->irq = (unsigned) MVME16x_IRQ_I596;
1161 goto found;
1162 }
1163 #endif
1164 #ifdef ENABLE_BVME6000_NET
1165 if (MACH_IS_BVME6000) {
1166 volatile unsigned char *rtc = (unsigned char *) BVME_RTC_BASE;
1167 unsigned char msr = rtc[3];
1168 int i;
1169
1170 rtc[3] |= 0x80;
1171 for (i = 0; i < 6; i++)
1172 eth_addr[i] = rtc[i * 4 + 7]; /* Stored in RTC RAM at offset 1 */
1173 rtc[3] = msr;
1174 dev->base_addr = BVME_I596_BASE;
1175 dev->irq = (unsigned) BVME_IRQ_I596;
1176 goto found;
1177 }
1178 #endif
1179 err = -ENODEV;
1180 goto out;
1181
1182 found:
1183 dev->mem_start = (int)__get_free_pages(GFP_ATOMIC, 0);
1184 if (!dev->mem_start) {
1185 err = -ENOMEM;
1186 goto out1;
1187 }
1188
1189 DEB(DEB_PROBE,printk(KERN_INFO "%s: 82596 at %#3lx,", dev->name, dev->base_addr));
1190
1191 for (i = 0; i < 6; i++)
1192 DEB(DEB_PROBE,printk(" %2.2X", dev->dev_addr[i] = eth_addr[i]));
1193
1194 DEB(DEB_PROBE,printk(" IRQ %d.\n", dev->irq));
1195
1196 DEB(DEB_PROBE,printk(KERN_INFO "%s", version));
1197
1198 /* The 82596-specific entries in the device structure. */
1199 dev->netdev_ops = &i596_netdev_ops;
1200 dev->watchdog_timeo = TX_TIMEOUT;
1201
1202 dev->ml_priv = (void *)(dev->mem_start);
1203
1204 lp = dev->ml_priv;
1205 DEB(DEB_INIT,printk(KERN_DEBUG "%s: lp at 0x%08lx (%zd bytes), "
1206 "lp->scb at 0x%08lx\n",
1207 dev->name, (unsigned long)lp,
1208 sizeof(struct i596_private), (unsigned long)&lp->scb));
1209 memset((void *) lp, 0, sizeof(struct i596_private));
1210
1211 #ifdef __mc68000__
1212 cache_push(virt_to_phys((void *)(dev->mem_start)), 4096);
1213 cache_clear(virt_to_phys((void *)(dev->mem_start)), 4096);
1214 kernel_set_cachemode((void *)(dev->mem_start), 4096, IOMAP_NOCACHE_SER);
1215 #endif
1216 lp->scb.command = 0;
1217 lp->scb.cmd = I596_NULL;
1218 lp->scb.rfd = I596_NULL;
1219 spin_lock_init(&lp->lock);
1220
1221 err = register_netdev(dev);
1222 if (err)
1223 goto out2;
1224 return dev;
1225 out2:
1226 #ifdef __mc68000__
1227 /* XXX This assumes default cache mode to be IOMAP_FULL_CACHING,
1228 * XXX which may be invalid (CONFIG_060_WRITETHROUGH)
1229 */
1230 kernel_set_cachemode((void *)(dev->mem_start), 4096,
1231 IOMAP_FULL_CACHING);
1232 #endif
1233 free_page ((u32)(dev->mem_start));
1234 out1:
1235 out:
1236 free_netdev(dev);
1237 return ERR_PTR(err);
1238 }
1239
1240 static irqreturn_t i596_interrupt(int irq, void *dev_id)
1241 {
1242 struct net_device *dev = dev_id;
1243 struct i596_private *lp;
1244 short ioaddr;
1245 unsigned short status, ack_cmd = 0;
1246 int handled = 0;
1247
1248 #ifdef ENABLE_BVME6000_NET
1249 if (MACH_IS_BVME6000) {
1250 if (*(char *) BVME_LOCAL_IRQ_STAT & BVME_ETHERR) {
1251 i596_error(irq, dev_id);
1252 return IRQ_HANDLED;
1253 }
1254 }
1255 #endif
1256 if (dev == NULL) {
1257 printk(KERN_ERR "i596_interrupt(): irq %d for unknown device.\n", irq);
1258 return IRQ_NONE;
1259 }
1260
1261 ioaddr = dev->base_addr;
1262 lp = dev->ml_priv;
1263
1264 spin_lock (&lp->lock);
1265
1266 wait_cmd(dev,lp,100,"i596 interrupt, timeout");
1267 status = lp->scb.status;
1268
1269 DEB(DEB_INTS,printk(KERN_DEBUG "%s: i596 interrupt, IRQ %d, status %4.4x.\n",
1270 dev->name, irq, status));
1271
1272 ack_cmd = status & 0xf000;
1273
1274 if ((status & 0x8000) || (status & 0x2000)) {
1275 struct i596_cmd *ptr;
1276
1277 handled = 1;
1278 if ((status & 0x8000))
1279 DEB(DEB_INTS,printk(KERN_DEBUG "%s: i596 interrupt completed command.\n", dev->name));
1280 if ((status & 0x2000))
1281 DEB(DEB_INTS,printk(KERN_DEBUG "%s: i596 interrupt command unit inactive %x.\n", dev->name, status & 0x0700));
1282
1283 while ((lp->cmd_head != I596_NULL) && (lp->cmd_head->status & STAT_C)) {
1284 ptr = lp->cmd_head;
1285
1286 DEB(DEB_STATUS,printk(KERN_DEBUG "cmd_head->status = %04x, ->command = %04x\n",
1287 lp->cmd_head->status, lp->cmd_head->command));
1288 lp->cmd_head = ptr->v_next;
1289 lp->cmd_backlog--;
1290
1291 switch ((ptr->command) & 0x7) {
1292 case CmdTx:
1293 {
1294 struct tx_cmd *tx_cmd = (struct tx_cmd *) ptr;
1295 struct sk_buff *skb = tx_cmd->skb;
1296
1297 if ((ptr->status) & STAT_OK) {
1298 DEB(DEB_TXADDR,print_eth(skb->data, "tx-done"));
1299 } else {
1300 dev->stats.tx_errors++;
1301 if ((ptr->status) & 0x0020)
1302 dev->stats.collisions++;
1303 if (!((ptr->status) & 0x0040))
1304 dev->stats.tx_heartbeat_errors++;
1305 if ((ptr->status) & 0x0400)
1306 dev->stats.tx_carrier_errors++;
1307 if ((ptr->status) & 0x0800)
1308 dev->stats.collisions++;
1309 if ((ptr->status) & 0x1000)
1310 dev->stats.tx_aborted_errors++;
1311 }
1312
1313 dev_consume_skb_irq(skb);
1314
1315 tx_cmd->cmd.command = 0; /* Mark free */
1316 break;
1317 }
1318 case CmdTDR:
1319 {
1320 unsigned short status = ((struct tdr_cmd *)ptr)->status;
1321
1322 if (status & 0x8000) {
1323 DEB(DEB_TDR,printk(KERN_INFO "%s: link ok.\n", dev->name));
1324 } else {
1325 if (status & 0x4000)
1326 printk(KERN_ERR "%s: Transceiver problem.\n", dev->name);
1327 if (status & 0x2000)
1328 printk(KERN_ERR "%s: Termination problem.\n", dev->name);
1329 if (status & 0x1000)
1330 printk(KERN_ERR "%s: Short circuit.\n", dev->name);
1331
1332 DEB(DEB_TDR,printk(KERN_INFO "%s: Time %d.\n", dev->name, status & 0x07ff));
1333 }
1334 break;
1335 }
1336 case CmdConfigure:
1337 case CmdMulticastList:
1338 /* Zap command so set_multicast_list() knows it is free */
1339 ptr->command = 0;
1340 break;
1341 }
1342 ptr->v_next = ptr->b_next = I596_NULL;
1343 lp->last_cmd = jiffies;
1344 }
1345
1346 ptr = lp->cmd_head;
1347 while ((ptr != I596_NULL) && (ptr != lp->cmd_tail)) {
1348 ptr->command &= 0x1fff;
1349 ptr = ptr->v_next;
1350 }
1351
1352 if ((lp->cmd_head != I596_NULL))
1353 ack_cmd |= CUC_START;
1354 lp->scb.cmd = WSWAPcmd(virt_to_bus(&lp->cmd_head->status));
1355 }
1356 if ((status & 0x1000) || (status & 0x4000)) {
1357 if ((status & 0x4000))
1358 DEB(DEB_INTS,printk(KERN_DEBUG "%s: i596 interrupt received a frame.\n", dev->name));
1359 i596_rx(dev);
1360 /* Only RX_START if stopped - RGH 07-07-96 */
1361 if (status & 0x1000) {
1362 if (netif_running(dev)) {
1363 DEB(DEB_ERRORS,printk(KERN_ERR "%s: i596 interrupt receive unit inactive, status 0x%x\n", dev->name, status));
1364 ack_cmd |= RX_START;
1365 dev->stats.rx_errors++;
1366 dev->stats.rx_fifo_errors++;
1367 rebuild_rx_bufs(dev);
1368 }
1369 }
1370 }
1371 wait_cmd(dev,lp,100,"i596 interrupt, timeout");
1372 lp->scb.command = ack_cmd;
1373
1374 #ifdef ENABLE_MVME16x_NET
1375 if (MACH_IS_MVME16x) {
1376 /* Ack the interrupt */
1377
1378 volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000;
1379
1380 pcc2[0x2a] |= 0x08;
1381 }
1382 #endif
1383 #ifdef ENABLE_BVME6000_NET
1384 if (MACH_IS_BVME6000) {
1385 volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG;
1386
1387 *ethirq = 1;
1388 *ethirq = 3;
1389 }
1390 #endif
1391 CA(dev);
1392
1393 DEB(DEB_INTS,printk(KERN_DEBUG "%s: exiting interrupt.\n", dev->name));
1394
1395 spin_unlock (&lp->lock);
1396 return IRQ_RETVAL(handled);
1397 }
1398
1399 static int i596_close(struct net_device *dev)
1400 {
1401 struct i596_private *lp = dev->ml_priv;
1402 unsigned long flags;
1403
1404 netif_stop_queue(dev);
1405
1406 DEB(DEB_INIT,printk(KERN_DEBUG "%s: Shutting down ethercard, status was %4.4x.\n",
1407 dev->name, lp->scb.status));
1408
1409 spin_lock_irqsave(&lp->lock, flags);
1410
1411 wait_cmd(dev,lp,100,"close1 timed out");
1412 lp->scb.command = CUC_ABORT | RX_ABORT;
1413 CA(dev);
1414
1415 wait_cmd(dev,lp,100,"close2 timed out");
1416
1417 spin_unlock_irqrestore(&lp->lock, flags);
1418 DEB(DEB_STRUCT,i596_display_data(dev));
1419 i596_cleanup_cmd(dev,lp);
1420
1421 #ifdef ENABLE_MVME16x_NET
1422 if (MACH_IS_MVME16x) {
1423 volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000;
1424
1425 /* Disable all ints */
1426 pcc2[0x28] = 1;
1427 pcc2[0x2a] = 0x40;
1428 pcc2[0x2b] = 0x40; /* Set snooping bits now! */
1429 }
1430 #endif
1431 #ifdef ENABLE_BVME6000_NET
1432 if (MACH_IS_BVME6000) {
1433 volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG;
1434
1435 *ethirq = 1;
1436 }
1437 #endif
1438
1439 #ifdef ENABLE_MVME16x_NET
1440 free_irq(0x56, dev);
1441 #endif
1442 free_irq(dev->irq, dev);
1443 remove_rx_bufs(dev);
1444
1445 return 0;
1446 }
1447
1448 /*
1449 * Set or clear the multicast filter for this adaptor.
1450 */
1451
1452 static void set_multicast_list(struct net_device *dev)
1453 {
1454 struct i596_private *lp = dev->ml_priv;
1455 int config = 0, cnt;
1456
1457 DEB(DEB_MULTI,printk(KERN_DEBUG "%s: set multicast list, %d entries, promisc %s, allmulti %s\n",
1458 dev->name, netdev_mc_count(dev),
1459 dev->flags & IFF_PROMISC ? "ON" : "OFF",
1460 dev->flags & IFF_ALLMULTI ? "ON" : "OFF"));
1461
1462 if (wait_cfg(dev, &lp->cf_cmd.cmd, 1000, "config change request timed out"))
1463 return;
1464
1465 if ((dev->flags & IFF_PROMISC) && !(lp->cf_cmd.i596_config[8] & 0x01)) {
1466 lp->cf_cmd.i596_config[8] |= 0x01;
1467 config = 1;
1468 }
1469 if (!(dev->flags & IFF_PROMISC) && (lp->cf_cmd.i596_config[8] & 0x01)) {
1470 lp->cf_cmd.i596_config[8] &= ~0x01;
1471 config = 1;
1472 }
1473 if ((dev->flags & IFF_ALLMULTI) && (lp->cf_cmd.i596_config[11] & 0x20)) {
1474 lp->cf_cmd.i596_config[11] &= ~0x20;
1475 config = 1;
1476 }
1477 if (!(dev->flags & IFF_ALLMULTI) && !(lp->cf_cmd.i596_config[11] & 0x20)) {
1478 lp->cf_cmd.i596_config[11] |= 0x20;
1479 config = 1;
1480 }
1481 if (config) {
1482 lp->cf_cmd.cmd.command = CmdConfigure;
1483 i596_add_cmd(dev, &lp->cf_cmd.cmd);
1484 }
1485
1486 cnt = netdev_mc_count(dev);
1487 if (cnt > MAX_MC_CNT)
1488 {
1489 cnt = MAX_MC_CNT;
1490 printk(KERN_ERR "%s: Only %d multicast addresses supported",
1491 dev->name, cnt);
1492 }
1493
1494 if (!netdev_mc_empty(dev)) {
1495 struct netdev_hw_addr *ha;
1496 unsigned char *cp;
1497 struct mc_cmd *cmd;
1498
1499 if (wait_cfg(dev, &lp->mc_cmd.cmd, 1000, "multicast list change request timed out"))
1500 return;
1501 cmd = &lp->mc_cmd;
1502 cmd->cmd.command = CmdMulticastList;
1503 cmd->mc_cnt = cnt * ETH_ALEN;
1504 cp = cmd->mc_addrs;
1505 netdev_for_each_mc_addr(ha, dev) {
1506 if (!cnt--)
1507 break;
1508 memcpy(cp, ha->addr, ETH_ALEN);
1509 if (i596_debug > 1)
1510 DEB(DEB_MULTI,printk(KERN_INFO "%s: Adding address %pM\n",
1511 dev->name, cp));
1512 cp += ETH_ALEN;
1513 }
1514 i596_add_cmd(dev, &cmd->cmd);
1515 }
1516 }
1517
1518 #ifdef MODULE
1519 static struct net_device *dev_82596;
1520
1521 static int debug = -1;
1522 module_param(debug, int, 0);
1523 MODULE_PARM_DESC(debug, "i82596 debug mask");
1524
1525 int __init init_module(void)
1526 {
1527 if (debug >= 0)
1528 i596_debug = debug;
1529 dev_82596 = i82596_probe(-1);
1530 return PTR_ERR_OR_ZERO(dev_82596);
1531 }
1532
1533 void __exit cleanup_module(void)
1534 {
1535 unregister_netdev(dev_82596);
1536 #ifdef __mc68000__
1537 /* XXX This assumes default cache mode to be IOMAP_FULL_CACHING,
1538 * XXX which may be invalid (CONFIG_060_WRITETHROUGH)
1539 */
1540
1541 kernel_set_cachemode((void *)(dev_82596->mem_start), 4096,
1542 IOMAP_FULL_CACHING);
1543 #endif
1544 free_page ((u32)(dev_82596->mem_start));
1545 free_netdev(dev_82596);
1546 }
1547
1548 #endif /* MODULE */
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