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 #include <linux/pgtable.h>
57
58 #include <asm/io.h>
59 #include <asm/dma.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, unsigned int txqueue);
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
CA(struct net_device * dev)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
MPU_PORT(struct net_device * dev,int c,volatile void * x)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
wait_istat(struct net_device * dev,struct i596_private * lp,int delcnt,char * str)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
wait_cmd(struct net_device * dev,struct i596_private * lp,int delcnt,char * str)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
wait_cfg(struct net_device * dev,struct i596_cmd * cmd,int delcnt,char * str)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
i596_display_data(struct net_device * dev)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)
i596_error(int irq,void * dev_id)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
remove_rx_bufs(struct net_device * dev)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
init_rx_bufs(struct net_device * dev)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
rebuild_rx_bufs(struct net_device * dev)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
init_i596_mem(struct net_device * dev)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
i596_rx(struct net_device * dev)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
i596_cleanup_cmd(struct net_device * dev,struct i596_private * lp)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
i596_reset(struct net_device * dev,struct i596_private * lp,int ioaddr)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
i596_add_cmd(struct net_device * dev,struct i596_cmd * cmd)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
i596_open(struct net_device * dev)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
i596_tx_timeout(struct net_device * dev,unsigned int txqueue)1022 static void i596_tx_timeout (struct net_device *dev, unsigned int txqueue)
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
i596_start_xmit(struct sk_buff * skb,struct net_device * dev)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
print_eth(unsigned char * add,char * str)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 const struct net_device_ops i596_netdev_ops = {
1114 .ndo_open = i596_open,
1115 .ndo_stop = i596_close,
1116 .ndo_start_xmit = i596_start_xmit,
1117 .ndo_set_rx_mode = set_multicast_list,
1118 .ndo_tx_timeout = i596_tx_timeout,
1119 .ndo_set_mac_address = eth_mac_addr,
1120 .ndo_validate_addr = eth_validate_addr,
1121 };
1122
i82596_probe(void)1123 static struct net_device * __init i82596_probe(void)
1124 {
1125 struct net_device *dev;
1126 int i;
1127 struct i596_private *lp;
1128 char eth_addr[8];
1129 static int probed;
1130 int err;
1131
1132 if (probed)
1133 return ERR_PTR(-ENODEV);
1134 probed++;
1135
1136 dev = alloc_etherdev(0);
1137 if (!dev)
1138 return ERR_PTR(-ENOMEM);
1139
1140 #ifdef ENABLE_MVME16x_NET
1141 if (MACH_IS_MVME16x) {
1142 if (mvme16x_config & MVME16x_CONFIG_NO_ETHERNET) {
1143 printk(KERN_NOTICE "Ethernet probe disabled - chip not present\n");
1144 err = -ENODEV;
1145 goto out;
1146 }
1147 memcpy(eth_addr, absolute_pointer(0xfffc1f2c), ETH_ALEN); /* YUCK! Get addr from NOVRAM */
1148 dev->base_addr = MVME_I596_BASE;
1149 dev->irq = (unsigned) MVME16x_IRQ_I596;
1150 goto found;
1151 }
1152 #endif
1153 #ifdef ENABLE_BVME6000_NET
1154 if (MACH_IS_BVME6000) {
1155 volatile unsigned char *rtc = (unsigned char *) BVME_RTC_BASE;
1156 unsigned char msr = rtc[3];
1157 int i;
1158
1159 rtc[3] |= 0x80;
1160 for (i = 0; i < 6; i++)
1161 eth_addr[i] = rtc[i * 4 + 7]; /* Stored in RTC RAM at offset 1 */
1162 rtc[3] = msr;
1163 dev->base_addr = BVME_I596_BASE;
1164 dev->irq = (unsigned) BVME_IRQ_I596;
1165 goto found;
1166 }
1167 #endif
1168 err = -ENODEV;
1169 goto out;
1170
1171 found:
1172 dev->mem_start = (int)__get_free_pages(GFP_ATOMIC, 0);
1173 if (!dev->mem_start) {
1174 err = -ENOMEM;
1175 goto out1;
1176 }
1177
1178 DEB(DEB_PROBE,printk(KERN_INFO "%s: 82596 at %#3lx,", dev->name, dev->base_addr));
1179
1180 for (i = 0; i < 6; i++)
1181 DEB(DEB_PROBE,printk(" %2.2X", eth_addr[i]));
1182 eth_hw_addr_set(dev, eth_addr);
1183
1184 DEB(DEB_PROBE,printk(" IRQ %d.\n", dev->irq));
1185
1186 DEB(DEB_PROBE,printk(KERN_INFO "%s", version));
1187
1188 /* The 82596-specific entries in the device structure. */
1189 dev->netdev_ops = &i596_netdev_ops;
1190 dev->watchdog_timeo = TX_TIMEOUT;
1191
1192 dev->ml_priv = (void *)(dev->mem_start);
1193
1194 lp = dev->ml_priv;
1195 DEB(DEB_INIT,printk(KERN_DEBUG "%s: lp at 0x%08lx (%zd bytes), "
1196 "lp->scb at 0x%08lx\n",
1197 dev->name, (unsigned long)lp,
1198 sizeof(struct i596_private), (unsigned long)&lp->scb));
1199 memset((void *) lp, 0, sizeof(struct i596_private));
1200
1201 #ifdef __mc68000__
1202 cache_push(virt_to_phys((void *)(dev->mem_start)), 4096);
1203 cache_clear(virt_to_phys((void *)(dev->mem_start)), 4096);
1204 kernel_set_cachemode((void *)(dev->mem_start), 4096, IOMAP_NOCACHE_SER);
1205 #endif
1206 lp->scb.command = 0;
1207 lp->scb.cmd = I596_NULL;
1208 lp->scb.rfd = I596_NULL;
1209 spin_lock_init(&lp->lock);
1210
1211 err = register_netdev(dev);
1212 if (err)
1213 goto out2;
1214 return dev;
1215 out2:
1216 #ifdef __mc68000__
1217 /* XXX This assumes default cache mode to be IOMAP_FULL_CACHING,
1218 * XXX which may be invalid (CONFIG_060_WRITETHROUGH)
1219 */
1220 kernel_set_cachemode((void *)(dev->mem_start), 4096,
1221 IOMAP_FULL_CACHING);
1222 #endif
1223 free_page ((u32)(dev->mem_start));
1224 out1:
1225 out:
1226 free_netdev(dev);
1227 return ERR_PTR(err);
1228 }
1229
i596_interrupt(int irq,void * dev_id)1230 static irqreturn_t i596_interrupt(int irq, void *dev_id)
1231 {
1232 struct net_device *dev = dev_id;
1233 struct i596_private *lp;
1234 short ioaddr;
1235 unsigned short status, ack_cmd = 0;
1236 int handled = 0;
1237
1238 #ifdef ENABLE_BVME6000_NET
1239 if (MACH_IS_BVME6000) {
1240 if (*(char *) BVME_LOCAL_IRQ_STAT & BVME_ETHERR) {
1241 i596_error(irq, dev_id);
1242 return IRQ_HANDLED;
1243 }
1244 }
1245 #endif
1246 if (dev == NULL) {
1247 printk(KERN_ERR "i596_interrupt(): irq %d for unknown device.\n", irq);
1248 return IRQ_NONE;
1249 }
1250
1251 ioaddr = dev->base_addr;
1252 lp = dev->ml_priv;
1253
1254 spin_lock (&lp->lock);
1255
1256 wait_cmd(dev,lp,100,"i596 interrupt, timeout");
1257 status = lp->scb.status;
1258
1259 DEB(DEB_INTS,printk(KERN_DEBUG "%s: i596 interrupt, IRQ %d, status %4.4x.\n",
1260 dev->name, irq, status));
1261
1262 ack_cmd = status & 0xf000;
1263
1264 if ((status & 0x8000) || (status & 0x2000)) {
1265 struct i596_cmd *ptr;
1266
1267 handled = 1;
1268 if ((status & 0x8000))
1269 DEB(DEB_INTS,printk(KERN_DEBUG "%s: i596 interrupt completed command.\n", dev->name));
1270 if ((status & 0x2000))
1271 DEB(DEB_INTS,printk(KERN_DEBUG "%s: i596 interrupt command unit inactive %x.\n", dev->name, status & 0x0700));
1272
1273 while ((lp->cmd_head != I596_NULL) && (lp->cmd_head->status & STAT_C)) {
1274 ptr = lp->cmd_head;
1275
1276 DEB(DEB_STATUS,printk(KERN_DEBUG "cmd_head->status = %04x, ->command = %04x\n",
1277 lp->cmd_head->status, lp->cmd_head->command));
1278 lp->cmd_head = ptr->v_next;
1279 lp->cmd_backlog--;
1280
1281 switch ((ptr->command) & 0x7) {
1282 case CmdTx:
1283 {
1284 struct tx_cmd *tx_cmd = (struct tx_cmd *) ptr;
1285 struct sk_buff *skb = tx_cmd->skb;
1286
1287 if ((ptr->status) & STAT_OK) {
1288 DEB(DEB_TXADDR,print_eth(skb->data, "tx-done"));
1289 } else {
1290 dev->stats.tx_errors++;
1291 if ((ptr->status) & 0x0020)
1292 dev->stats.collisions++;
1293 if (!((ptr->status) & 0x0040))
1294 dev->stats.tx_heartbeat_errors++;
1295 if ((ptr->status) & 0x0400)
1296 dev->stats.tx_carrier_errors++;
1297 if ((ptr->status) & 0x0800)
1298 dev->stats.collisions++;
1299 if ((ptr->status) & 0x1000)
1300 dev->stats.tx_aborted_errors++;
1301 }
1302
1303 dev_consume_skb_irq(skb);
1304
1305 tx_cmd->cmd.command = 0; /* Mark free */
1306 break;
1307 }
1308 case CmdTDR:
1309 {
1310 unsigned short status = ((struct tdr_cmd *)ptr)->status;
1311
1312 if (status & 0x8000) {
1313 DEB(DEB_TDR,printk(KERN_INFO "%s: link ok.\n", dev->name));
1314 } else {
1315 if (status & 0x4000)
1316 printk(KERN_ERR "%s: Transceiver problem.\n", dev->name);
1317 if (status & 0x2000)
1318 printk(KERN_ERR "%s: Termination problem.\n", dev->name);
1319 if (status & 0x1000)
1320 printk(KERN_ERR "%s: Short circuit.\n", dev->name);
1321
1322 DEB(DEB_TDR,printk(KERN_INFO "%s: Time %d.\n", dev->name, status & 0x07ff));
1323 }
1324 break;
1325 }
1326 case CmdConfigure:
1327 case CmdMulticastList:
1328 /* Zap command so set_multicast_list() knows it is free */
1329 ptr->command = 0;
1330 break;
1331 }
1332 ptr->v_next = ptr->b_next = I596_NULL;
1333 lp->last_cmd = jiffies;
1334 }
1335
1336 ptr = lp->cmd_head;
1337 while ((ptr != I596_NULL) && (ptr != lp->cmd_tail)) {
1338 ptr->command &= 0x1fff;
1339 ptr = ptr->v_next;
1340 }
1341
1342 if ((lp->cmd_head != I596_NULL))
1343 ack_cmd |= CUC_START;
1344 lp->scb.cmd = WSWAPcmd(virt_to_bus(&lp->cmd_head->status));
1345 }
1346 if ((status & 0x1000) || (status & 0x4000)) {
1347 if ((status & 0x4000))
1348 DEB(DEB_INTS,printk(KERN_DEBUG "%s: i596 interrupt received a frame.\n", dev->name));
1349 i596_rx(dev);
1350 /* Only RX_START if stopped - RGH 07-07-96 */
1351 if (status & 0x1000) {
1352 if (netif_running(dev)) {
1353 DEB(DEB_ERRORS,printk(KERN_ERR "%s: i596 interrupt receive unit inactive, status 0x%x\n", dev->name, status));
1354 ack_cmd |= RX_START;
1355 dev->stats.rx_errors++;
1356 dev->stats.rx_fifo_errors++;
1357 rebuild_rx_bufs(dev);
1358 }
1359 }
1360 }
1361 wait_cmd(dev,lp,100,"i596 interrupt, timeout");
1362 lp->scb.command = ack_cmd;
1363
1364 #ifdef ENABLE_MVME16x_NET
1365 if (MACH_IS_MVME16x) {
1366 /* Ack the interrupt */
1367
1368 volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000;
1369
1370 pcc2[0x2a] |= 0x08;
1371 }
1372 #endif
1373 #ifdef ENABLE_BVME6000_NET
1374 if (MACH_IS_BVME6000) {
1375 volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG;
1376
1377 *ethirq = 1;
1378 *ethirq = 3;
1379 }
1380 #endif
1381 CA(dev);
1382
1383 DEB(DEB_INTS,printk(KERN_DEBUG "%s: exiting interrupt.\n", dev->name));
1384
1385 spin_unlock (&lp->lock);
1386 return IRQ_RETVAL(handled);
1387 }
1388
i596_close(struct net_device * dev)1389 static int i596_close(struct net_device *dev)
1390 {
1391 struct i596_private *lp = dev->ml_priv;
1392 unsigned long flags;
1393
1394 netif_stop_queue(dev);
1395
1396 DEB(DEB_INIT,printk(KERN_DEBUG "%s: Shutting down ethercard, status was %4.4x.\n",
1397 dev->name, lp->scb.status));
1398
1399 spin_lock_irqsave(&lp->lock, flags);
1400
1401 wait_cmd(dev,lp,100,"close1 timed out");
1402 lp->scb.command = CUC_ABORT | RX_ABORT;
1403 CA(dev);
1404
1405 wait_cmd(dev,lp,100,"close2 timed out");
1406
1407 spin_unlock_irqrestore(&lp->lock, flags);
1408 DEB(DEB_STRUCT,i596_display_data(dev));
1409 i596_cleanup_cmd(dev,lp);
1410
1411 #ifdef ENABLE_MVME16x_NET
1412 if (MACH_IS_MVME16x) {
1413 volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000;
1414
1415 /* Disable all ints */
1416 pcc2[0x28] = 1;
1417 pcc2[0x2a] = 0x40;
1418 pcc2[0x2b] = 0x40; /* Set snooping bits now! */
1419 }
1420 #endif
1421 #ifdef ENABLE_BVME6000_NET
1422 if (MACH_IS_BVME6000) {
1423 volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG;
1424
1425 *ethirq = 1;
1426 }
1427 #endif
1428
1429 #ifdef ENABLE_MVME16x_NET
1430 free_irq(0x56, dev);
1431 #endif
1432 free_irq(dev->irq, dev);
1433 remove_rx_bufs(dev);
1434
1435 return 0;
1436 }
1437
1438 /*
1439 * Set or clear the multicast filter for this adaptor.
1440 */
1441
set_multicast_list(struct net_device * dev)1442 static void set_multicast_list(struct net_device *dev)
1443 {
1444 struct i596_private *lp = dev->ml_priv;
1445 int config = 0, cnt;
1446
1447 DEB(DEB_MULTI,printk(KERN_DEBUG "%s: set multicast list, %d entries, promisc %s, allmulti %s\n",
1448 dev->name, netdev_mc_count(dev),
1449 dev->flags & IFF_PROMISC ? "ON" : "OFF",
1450 dev->flags & IFF_ALLMULTI ? "ON" : "OFF"));
1451
1452 if (wait_cfg(dev, &lp->cf_cmd.cmd, 1000, "config change request timed out"))
1453 return;
1454
1455 if ((dev->flags & IFF_PROMISC) && !(lp->cf_cmd.i596_config[8] & 0x01)) {
1456 lp->cf_cmd.i596_config[8] |= 0x01;
1457 config = 1;
1458 }
1459 if (!(dev->flags & IFF_PROMISC) && (lp->cf_cmd.i596_config[8] & 0x01)) {
1460 lp->cf_cmd.i596_config[8] &= ~0x01;
1461 config = 1;
1462 }
1463 if ((dev->flags & IFF_ALLMULTI) && (lp->cf_cmd.i596_config[11] & 0x20)) {
1464 lp->cf_cmd.i596_config[11] &= ~0x20;
1465 config = 1;
1466 }
1467 if (!(dev->flags & IFF_ALLMULTI) && !(lp->cf_cmd.i596_config[11] & 0x20)) {
1468 lp->cf_cmd.i596_config[11] |= 0x20;
1469 config = 1;
1470 }
1471 if (config) {
1472 lp->cf_cmd.cmd.command = CmdConfigure;
1473 i596_add_cmd(dev, &lp->cf_cmd.cmd);
1474 }
1475
1476 cnt = netdev_mc_count(dev);
1477 if (cnt > MAX_MC_CNT)
1478 {
1479 cnt = MAX_MC_CNT;
1480 printk(KERN_ERR "%s: Only %d multicast addresses supported",
1481 dev->name, cnt);
1482 }
1483
1484 if (!netdev_mc_empty(dev)) {
1485 struct netdev_hw_addr *ha;
1486 unsigned char *cp;
1487 struct mc_cmd *cmd;
1488
1489 if (wait_cfg(dev, &lp->mc_cmd.cmd, 1000, "multicast list change request timed out"))
1490 return;
1491 cmd = &lp->mc_cmd;
1492 cmd->cmd.command = CmdMulticastList;
1493 cmd->mc_cnt = cnt * ETH_ALEN;
1494 cp = cmd->mc_addrs;
1495 netdev_for_each_mc_addr(ha, dev) {
1496 if (!cnt--)
1497 break;
1498 memcpy(cp, ha->addr, ETH_ALEN);
1499 if (i596_debug > 1)
1500 DEB(DEB_MULTI,printk(KERN_INFO "%s: Adding address %pM\n",
1501 dev->name, cp));
1502 cp += ETH_ALEN;
1503 }
1504 i596_add_cmd(dev, &cmd->cmd);
1505 }
1506 }
1507
1508 static struct net_device *dev_82596;
1509
1510 static int debug = -1;
1511 module_param(debug, int, 0);
1512 MODULE_PARM_DESC(debug, "i82596 debug mask");
1513
i82596_init(void)1514 static int __init i82596_init(void)
1515 {
1516 if (debug >= 0)
1517 i596_debug = debug;
1518 dev_82596 = i82596_probe();
1519 return PTR_ERR_OR_ZERO(dev_82596);
1520 }
1521 module_init(i82596_init);
1522
i82596_cleanup(void)1523 static void __exit i82596_cleanup(void)
1524 {
1525 unregister_netdev(dev_82596);
1526 #ifdef __mc68000__
1527 /* XXX This assumes default cache mode to be IOMAP_FULL_CACHING,
1528 * XXX which may be invalid (CONFIG_060_WRITETHROUGH)
1529 */
1530
1531 kernel_set_cachemode((void *)(dev_82596->mem_start), 4096,
1532 IOMAP_FULL_CACHING);
1533 #endif
1534 free_page ((u32)(dev_82596->mem_start));
1535 free_netdev(dev_82596);
1536 }
1537 module_exit(i82596_cleanup);
1538
