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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 | #if defined(CONFIG_APRICOT) || defined(CONFIG_APRICOT_MODULE) |
99 | #define ENABLE_APRICOT |
100 | #endif |
101 | |
102 | #ifdef ENABLE_MVME16x_NET |
103 | #include <asm/mvme16xhw.h> |
104 | #endif |
105 | #ifdef ENABLE_BVME6000_NET |
106 | #include <asm/bvme6000hw.h> |
107 | #endif |
108 | |
109 | /* |
110 | * Define various macros for Channel Attention, word swapping etc., dependent |
111 | * on architecture. MVME and BVME are 680x0 based, otherwise it is Intel. |
112 | */ |
113 | |
114 | #ifdef __mc68000__ |
115 | #define WSWAPrfd(x) ((struct i596_rfd *) (((u32)(x)<<16) | ((((u32)(x)))>>16))) |
116 | #define WSWAPrbd(x) ((struct i596_rbd *) (((u32)(x)<<16) | ((((u32)(x)))>>16))) |
117 | #define WSWAPiscp(x) ((struct i596_iscp *)(((u32)(x)<<16) | ((((u32)(x)))>>16))) |
118 | #define WSWAPscb(x) ((struct i596_scb *) (((u32)(x)<<16) | ((((u32)(x)))>>16))) |
119 | #define WSWAPcmd(x) ((struct i596_cmd *) (((u32)(x)<<16) | ((((u32)(x)))>>16))) |
120 | #define WSWAPtbd(x) ((struct i596_tbd *) (((u32)(x)<<16) | ((((u32)(x)))>>16))) |
121 | #define WSWAPchar(x) ((char *) (((u32)(x)<<16) | ((((u32)(x)))>>16))) |
122 | #define ISCP_BUSY 0x00010000 |
123 | #define MACH_IS_APRICOT 0 |
124 | #else |
125 | #define WSWAPrfd(x) ((struct i596_rfd *)((long)x)) |
126 | #define WSWAPrbd(x) ((struct i596_rbd *)((long)x)) |
127 | #define WSWAPiscp(x) ((struct i596_iscp *)((long)x)) |
128 | #define WSWAPscb(x) ((struct i596_scb *)((long)x)) |
129 | #define WSWAPcmd(x) ((struct i596_cmd *)((long)x)) |
130 | #define WSWAPtbd(x) ((struct i596_tbd *)((long)x)) |
131 | #define WSWAPchar(x) ((char *)((long)x)) |
132 | #define ISCP_BUSY 0x0001 |
133 | #define MACH_IS_APRICOT 1 |
134 | #endif |
135 | |
136 | /* |
137 | * The MPU_PORT command allows direct access to the 82596. With PORT access |
138 | * the following commands are available (p5-18). The 32-bit port command |
139 | * must be word-swapped with the most significant word written first. |
140 | * This only applies to VME boards. |
141 | */ |
142 | #define PORT_RESET 0x00 /* reset 82596 */ |
143 | #define PORT_SELFTEST 0x01 /* selftest */ |
144 | #define PORT_ALTSCP 0x02 /* alternate SCB address */ |
145 | #define PORT_ALTDUMP 0x03 /* Alternate DUMP address */ |
146 | |
147 | static int i596_debug = (DEB_SERIOUS|DEB_PROBE); |
148 | |
149 | MODULE_AUTHOR("Richard Hirst"); |
150 | MODULE_DESCRIPTION("i82596 driver"); |
151 | MODULE_LICENSE("GPL"); |
152 | |
153 | module_param(i596_debug, int, 0); |
154 | MODULE_PARM_DESC(i596_debug, "i82596 debug mask"); |
155 | |
156 | |
157 | /* Copy frames shorter than rx_copybreak, otherwise pass on up in |
158 | * a full sized sk_buff. Value of 100 stolen from tulip.c (!alpha). |
159 | */ |
160 | static int rx_copybreak = 100; |
161 | |
162 | #define PKT_BUF_SZ 1536 |
163 | #define MAX_MC_CNT 64 |
164 | |
165 | #define I596_TOTAL_SIZE 17 |
166 | |
167 | #define I596_NULL ((void *)0xffffffff) |
168 | |
169 | #define CMD_EOL 0x8000 /* The last command of the list, stop. */ |
170 | #define CMD_SUSP 0x4000 /* Suspend after doing cmd. */ |
171 | #define CMD_INTR 0x2000 /* Interrupt after doing cmd. */ |
172 | |
173 | #define CMD_FLEX 0x0008 /* Enable flexible memory model */ |
174 | |
175 | enum commands { |
176 | CmdNOp = 0, CmdSASetup = 1, CmdConfigure = 2, CmdMulticastList = 3, |
177 | CmdTx = 4, CmdTDR = 5, CmdDump = 6, CmdDiagnose = 7 |
178 | }; |
179 | |
180 | #define STAT_C 0x8000 /* Set to 0 after execution */ |
181 | #define STAT_B 0x4000 /* Command being executed */ |
182 | #define STAT_OK 0x2000 /* Command executed ok */ |
183 | #define STAT_A 0x1000 /* Command aborted */ |
184 | |
185 | #define CUC_START 0x0100 |
186 | #define CUC_RESUME 0x0200 |
187 | #define CUC_SUSPEND 0x0300 |
188 | #define CUC_ABORT 0x0400 |
189 | #define RX_START 0x0010 |
190 | #define RX_RESUME 0x0020 |
191 | #define RX_SUSPEND 0x0030 |
192 | #define RX_ABORT 0x0040 |
193 | |
194 | #define TX_TIMEOUT 5 |
195 | |
196 | |
197 | struct i596_reg { |
198 | unsigned short porthi; |
199 | unsigned short portlo; |
200 | unsigned long ca; |
201 | }; |
202 | |
203 | #define EOF 0x8000 |
204 | #define SIZE_MASK 0x3fff |
205 | |
206 | struct i596_tbd { |
207 | unsigned short size; |
208 | unsigned short pad; |
209 | struct i596_tbd *next; |
210 | char *data; |
211 | }; |
212 | |
213 | /* The command structure has two 'next' pointers; v_next is the address of |
214 | * the next command as seen by the CPU, b_next is the address of the next |
215 | * command as seen by the 82596. The b_next pointer, as used by the 82596 |
216 | * always references the status field of the next command, rather than the |
217 | * v_next field, because the 82596 is unaware of v_next. It may seem more |
218 | * logical to put v_next at the end of the structure, but we cannot do that |
219 | * because the 82596 expects other fields to be there, depending on command |
220 | * type. |
221 | */ |
222 | |
223 | struct i596_cmd { |
224 | struct i596_cmd *v_next; /* Address from CPUs viewpoint */ |
225 | unsigned short status; |
226 | unsigned short command; |
227 | struct i596_cmd *b_next; /* Address from i596 viewpoint */ |
228 | }; |
229 | |
230 | struct tx_cmd { |
231 | struct i596_cmd cmd; |
232 | struct i596_tbd *tbd; |
233 | unsigned short size; |
234 | unsigned short pad; |
235 | struct sk_buff *skb; /* So we can free it after tx */ |
236 | }; |
237 | |
238 | struct tdr_cmd { |
239 | struct i596_cmd cmd; |
240 | unsigned short status; |
241 | unsigned short pad; |
242 | }; |
243 | |
244 | struct mc_cmd { |
245 | struct i596_cmd cmd; |
246 | short mc_cnt; |
247 | char mc_addrs[MAX_MC_CNT*6]; |
248 | }; |
249 | |
250 | struct sa_cmd { |
251 | struct i596_cmd cmd; |
252 | char eth_addr[8]; |
253 | }; |
254 | |
255 | struct cf_cmd { |
256 | struct i596_cmd cmd; |
257 | char i596_config[16]; |
258 | }; |
259 | |
260 | struct i596_rfd { |
261 | unsigned short stat; |
262 | unsigned short cmd; |
263 | struct i596_rfd *b_next; /* Address from i596 viewpoint */ |
264 | struct i596_rbd *rbd; |
265 | unsigned short count; |
266 | unsigned short size; |
267 | struct i596_rfd *v_next; /* Address from CPUs viewpoint */ |
268 | struct i596_rfd *v_prev; |
269 | }; |
270 | |
271 | struct i596_rbd { |
272 | unsigned short count; |
273 | unsigned short zero1; |
274 | struct i596_rbd *b_next; |
275 | unsigned char *b_data; /* Address from i596 viewpoint */ |
276 | unsigned short size; |
277 | unsigned short zero2; |
278 | struct sk_buff *skb; |
279 | struct i596_rbd *v_next; |
280 | struct i596_rbd *b_addr; /* This rbd addr from i596 view */ |
281 | unsigned char *v_data; /* Address from CPUs viewpoint */ |
282 | }; |
283 | |
284 | #define TX_RING_SIZE 64 |
285 | #define RX_RING_SIZE 16 |
286 | |
287 | struct i596_scb { |
288 | unsigned short status; |
289 | unsigned short command; |
290 | struct i596_cmd *cmd; |
291 | struct i596_rfd *rfd; |
292 | unsigned long crc_err; |
293 | unsigned long align_err; |
294 | unsigned long resource_err; |
295 | unsigned long over_err; |
296 | unsigned long rcvdt_err; |
297 | unsigned long short_err; |
298 | unsigned short t_on; |
299 | unsigned short t_off; |
300 | }; |
301 | |
302 | struct i596_iscp { |
303 | unsigned long stat; |
304 | struct i596_scb *scb; |
305 | }; |
306 | |
307 | struct i596_scp { |
308 | unsigned long sysbus; |
309 | unsigned long pad; |
310 | struct i596_iscp *iscp; |
311 | }; |
312 | |
313 | struct i596_private { |
314 | volatile struct i596_scp scp; |
315 | volatile struct i596_iscp iscp; |
316 | volatile struct i596_scb scb; |
317 | struct sa_cmd sa_cmd; |
318 | struct cf_cmd cf_cmd; |
319 | struct tdr_cmd tdr_cmd; |
320 | struct mc_cmd mc_cmd; |
321 | unsigned long stat; |
322 | int last_restart __attribute__((aligned(4))); |
323 | struct i596_rfd *rfd_head; |
324 | struct i596_rbd *rbd_head; |
325 | struct i596_cmd *cmd_tail; |
326 | struct i596_cmd *cmd_head; |
327 | int cmd_backlog; |
328 | unsigned long last_cmd; |
329 | struct i596_rfd rfds[RX_RING_SIZE]; |
330 | struct i596_rbd rbds[RX_RING_SIZE]; |
331 | struct tx_cmd tx_cmds[TX_RING_SIZE]; |
332 | struct i596_tbd tbds[TX_RING_SIZE]; |
333 | int next_tx_cmd; |
334 | spinlock_t lock; |
335 | }; |
336 | |
337 | static char init_setup[] = |
338 | { |
339 | 0x8E, /* length, prefetch on */ |
340 | 0xC8, /* fifo to 8, monitor off */ |
341 | #ifdef CONFIG_VME |
342 | 0xc0, /* don't save bad frames */ |
343 | #else |
344 | 0x80, /* don't save bad frames */ |
345 | #endif |
346 | 0x2E, /* No source address insertion, 8 byte preamble */ |
347 | 0x00, /* priority and backoff defaults */ |
348 | 0x60, /* interframe spacing */ |
349 | 0x00, /* slot time LSB */ |
350 | 0xf2, /* slot time and retries */ |
351 | 0x00, /* promiscuous mode */ |
352 | 0x00, /* collision detect */ |
353 | 0x40, /* minimum frame length */ |
354 | 0xff, |
355 | 0x00, |
356 | 0x7f /* *multi IA */ }; |
357 | |
358 | static int i596_open(struct net_device *dev); |
359 | static netdev_tx_t i596_start_xmit(struct sk_buff *skb, struct net_device *dev); |
360 | static irqreturn_t i596_interrupt(int irq, void *dev_id); |
361 | static int i596_close(struct net_device *dev); |
362 | static void i596_add_cmd(struct net_device *dev, struct i596_cmd *cmd); |
363 | static void i596_tx_timeout (struct net_device *dev); |
364 | static void print_eth(unsigned char *buf, char *str); |
365 | static void set_multicast_list(struct net_device *dev); |
366 | |
367 | static int rx_ring_size = RX_RING_SIZE; |
368 | static int ticks_limit = 25; |
369 | static int max_cmd_backlog = TX_RING_SIZE-1; |
370 | |
371 | |
372 | static inline void CA(struct net_device *dev) |
373 | { |
374 | #ifdef ENABLE_MVME16x_NET |
375 | if (MACH_IS_MVME16x) { |
376 | ((struct i596_reg *) dev->base_addr)->ca = 1; |
377 | } |
378 | #endif |
379 | #ifdef ENABLE_BVME6000_NET |
380 | if (MACH_IS_BVME6000) { |
381 | volatile u32 i; |
382 | |
383 | i = *(volatile u32 *) (dev->base_addr); |
384 | } |
385 | #endif |
386 | #ifdef ENABLE_APRICOT |
387 | if (MACH_IS_APRICOT) { |
388 | outw(0, (short) (dev->base_addr) + 4); |
389 | } |
390 | #endif |
391 | } |
392 | |
393 | |
394 | static inline void MPU_PORT(struct net_device *dev, int c, volatile void *x) |
395 | { |
396 | #ifdef ENABLE_MVME16x_NET |
397 | if (MACH_IS_MVME16x) { |
398 | struct i596_reg *p = (struct i596_reg *) (dev->base_addr); |
399 | p->porthi = ((c) | (u32) (x)) & 0xffff; |
400 | p->portlo = ((c) | (u32) (x)) >> 16; |
401 | } |
402 | #endif |
403 | #ifdef ENABLE_BVME6000_NET |
404 | if (MACH_IS_BVME6000) { |
405 | u32 v = (u32) (c) | (u32) (x); |
406 | v = ((u32) (v) << 16) | ((u32) (v) >> 16); |
407 | *(volatile u32 *) dev->base_addr = v; |
408 | udelay(1); |
409 | *(volatile u32 *) dev->base_addr = v; |
410 | } |
411 | #endif |
412 | } |
413 | |
414 | |
415 | static inline int wait_istat(struct net_device *dev, struct i596_private *lp, int delcnt, char *str) |
416 | { |
417 | while (--delcnt && lp->iscp.stat) |
418 | udelay(10); |
419 | if (!delcnt) { |
420 | printk(KERN_ERR "%s: %s, status %4.4x, cmd %4.4x.\n", |
421 | dev->name, str, lp->scb.status, lp->scb.command); |
422 | return -1; |
423 | } |
424 | else |
425 | return 0; |
426 | } |
427 | |
428 | |
429 | static inline int wait_cmd(struct net_device *dev, struct i596_private *lp, int delcnt, char *str) |
430 | { |
431 | while (--delcnt && lp->scb.command) |
432 | udelay(10); |
433 | if (!delcnt) { |
434 | printk(KERN_ERR "%s: %s, status %4.4x, cmd %4.4x.\n", |
435 | dev->name, str, lp->scb.status, lp->scb.command); |
436 | return -1; |
437 | } |
438 | else |
439 | return 0; |
440 | } |
441 | |
442 | |
443 | static inline int wait_cfg(struct net_device *dev, struct i596_cmd *cmd, int delcnt, char *str) |
444 | { |
445 | volatile struct i596_cmd *c = cmd; |
446 | |
447 | while (--delcnt && c->command) |
448 | udelay(10); |
449 | if (!delcnt) { |
450 | printk(KERN_ERR "%s: %s.\n", dev->name, str); |
451 | return -1; |
452 | } |
453 | else |
454 | return 0; |
455 | } |
456 | |
457 | |
458 | static void i596_display_data(struct net_device *dev) |
459 | { |
460 | struct i596_private *lp = dev->ml_priv; |
461 | struct i596_cmd *cmd; |
462 | struct i596_rfd *rfd; |
463 | struct i596_rbd *rbd; |
464 | |
465 | printk(KERN_ERR "lp and scp at %p, .sysbus = %08lx, .iscp = %p\n", |
466 | &lp->scp, lp->scp.sysbus, lp->scp.iscp); |
467 | printk(KERN_ERR "iscp at %p, iscp.stat = %08lx, .scb = %p\n", |
468 | &lp->iscp, lp->iscp.stat, lp->iscp.scb); |
469 | printk(KERN_ERR "scb at %p, scb.status = %04x, .command = %04x," |
470 | " .cmd = %p, .rfd = %p\n", |
471 | &lp->scb, lp->scb.status, lp->scb.command, |
472 | lp->scb.cmd, lp->scb.rfd); |
473 | printk(KERN_ERR " errors: crc %lx, align %lx, resource %lx," |
474 | " over %lx, rcvdt %lx, short %lx\n", |
475 | lp->scb.crc_err, lp->scb.align_err, lp->scb.resource_err, |
476 | lp->scb.over_err, lp->scb.rcvdt_err, lp->scb.short_err); |
477 | cmd = lp->cmd_head; |
478 | while (cmd != I596_NULL) { |
479 | printk(KERN_ERR "cmd at %p, .status = %04x, .command = %04x, .b_next = %p\n", |
480 | cmd, cmd->status, cmd->command, cmd->b_next); |
481 | cmd = cmd->v_next; |
482 | } |
483 | rfd = lp->rfd_head; |
484 | printk(KERN_ERR "rfd_head = %p\n", rfd); |
485 | do { |
486 | printk(KERN_ERR " %p .stat %04x, .cmd %04x, b_next %p, rbd %p," |
487 | " count %04x\n", |
488 | rfd, rfd->stat, rfd->cmd, rfd->b_next, rfd->rbd, |
489 | rfd->count); |
490 | rfd = rfd->v_next; |
491 | } while (rfd != lp->rfd_head); |
492 | rbd = lp->rbd_head; |
493 | printk(KERN_ERR "rbd_head = %p\n", rbd); |
494 | do { |
495 | printk(KERN_ERR " %p .count %04x, b_next %p, b_data %p, size %04x\n", |
496 | rbd, rbd->count, rbd->b_next, rbd->b_data, rbd->size); |
497 | rbd = rbd->v_next; |
498 | } while (rbd != lp->rbd_head); |
499 | } |
500 | |
501 | |
502 | #if defined(ENABLE_MVME16x_NET) || defined(ENABLE_BVME6000_NET) |
503 | static irqreturn_t i596_error(int irq, void *dev_id) |
504 | { |
505 | struct net_device *dev = dev_id; |
506 | #ifdef ENABLE_MVME16x_NET |
507 | if (MACH_IS_MVME16x) { |
508 | volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000; |
509 | |
510 | pcc2[0x28] = 1; |
511 | pcc2[0x2b] = 0x1d; |
512 | } |
513 | #endif |
514 | #ifdef ENABLE_BVME6000_NET |
515 | if (MACH_IS_BVME6000) { |
516 | volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG; |
517 | |
518 | *ethirq = 1; |
519 | *ethirq = 3; |
520 | } |
521 | #endif |
522 | printk(KERN_ERR "%s: Error interrupt\n", dev->name); |
523 | i596_display_data(dev); |
524 | return IRQ_HANDLED; |
525 | } |
526 | #endif |
527 | |
528 | static inline void init_rx_bufs(struct net_device *dev) |
529 | { |
530 | struct i596_private *lp = dev->ml_priv; |
531 | int i; |
532 | struct i596_rfd *rfd; |
533 | struct i596_rbd *rbd; |
534 | |
535 | /* First build the Receive Buffer Descriptor List */ |
536 | |
537 | for (i = 0, rbd = lp->rbds; i < rx_ring_size; i++, rbd++) { |
538 | struct sk_buff *skb = dev_alloc_skb(PKT_BUF_SZ); |
539 | |
540 | if (skb == NULL) |
541 | panic("82596: alloc_skb() failed"); |
542 | skb->dev = dev; |
543 | rbd->v_next = rbd+1; |
544 | rbd->b_next = WSWAPrbd(virt_to_bus(rbd+1)); |
545 | rbd->b_addr = WSWAPrbd(virt_to_bus(rbd)); |
546 | rbd->skb = skb; |
547 | rbd->v_data = skb->data; |
548 | rbd->b_data = WSWAPchar(virt_to_bus(skb->data)); |
549 | rbd->size = PKT_BUF_SZ; |
550 | #ifdef __mc68000__ |
551 | cache_clear(virt_to_phys(skb->data), PKT_BUF_SZ); |
552 | #endif |
553 | } |
554 | lp->rbd_head = lp->rbds; |
555 | rbd = lp->rbds + rx_ring_size - 1; |
556 | rbd->v_next = lp->rbds; |
557 | rbd->b_next = WSWAPrbd(virt_to_bus(lp->rbds)); |
558 | |
559 | /* Now build the Receive Frame Descriptor List */ |
560 | |
561 | for (i = 0, rfd = lp->rfds; i < rx_ring_size; i++, rfd++) { |
562 | rfd->rbd = I596_NULL; |
563 | rfd->v_next = rfd+1; |
564 | rfd->v_prev = rfd-1; |
565 | rfd->b_next = WSWAPrfd(virt_to_bus(rfd+1)); |
566 | rfd->cmd = CMD_FLEX; |
567 | } |
568 | lp->rfd_head = lp->rfds; |
569 | lp->scb.rfd = WSWAPrfd(virt_to_bus(lp->rfds)); |
570 | rfd = lp->rfds; |
571 | rfd->rbd = lp->rbd_head; |
572 | rfd->v_prev = lp->rfds + rx_ring_size - 1; |
573 | rfd = lp->rfds + rx_ring_size - 1; |
574 | rfd->v_next = lp->rfds; |
575 | rfd->b_next = WSWAPrfd(virt_to_bus(lp->rfds)); |
576 | rfd->cmd = CMD_EOL|CMD_FLEX; |
577 | } |
578 | |
579 | static inline void remove_rx_bufs(struct net_device *dev) |
580 | { |
581 | struct i596_private *lp = dev->ml_priv; |
582 | struct i596_rbd *rbd; |
583 | int i; |
584 | |
585 | for (i = 0, rbd = lp->rbds; i < rx_ring_size; i++, rbd++) { |
586 | if (rbd->skb == NULL) |
587 | break; |
588 | dev_kfree_skb(rbd->skb); |
589 | } |
590 | } |
591 | |
592 | |
593 | static void rebuild_rx_bufs(struct net_device *dev) |
594 | { |
595 | struct i596_private *lp = dev->ml_priv; |
596 | int i; |
597 | |
598 | /* Ensure rx frame/buffer descriptors are tidy */ |
599 | |
600 | for (i = 0; i < rx_ring_size; i++) { |
601 | lp->rfds[i].rbd = I596_NULL; |
602 | lp->rfds[i].cmd = CMD_FLEX; |
603 | } |
604 | lp->rfds[rx_ring_size-1].cmd = CMD_EOL|CMD_FLEX; |
605 | lp->rfd_head = lp->rfds; |
606 | lp->scb.rfd = WSWAPrfd(virt_to_bus(lp->rfds)); |
607 | lp->rbd_head = lp->rbds; |
608 | lp->rfds[0].rbd = WSWAPrbd(virt_to_bus(lp->rbds)); |
609 | } |
610 | |
611 | |
612 | static int init_i596_mem(struct net_device *dev) |
613 | { |
614 | struct i596_private *lp = dev->ml_priv; |
615 | #if !defined(ENABLE_MVME16x_NET) && !defined(ENABLE_BVME6000_NET) || defined(ENABLE_APRICOT) |
616 | short ioaddr = dev->base_addr; |
617 | #endif |
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 | #elif defined(ENABLE_APRICOT) |
652 | |
653 | { |
654 | u32 scp = virt_to_bus(&lp->scp); |
655 | |
656 | /* change the scp address */ |
657 | outw(0, ioaddr); |
658 | outw(0, ioaddr); |
659 | outb(4, ioaddr + 0xf); |
660 | outw(scp | 2, ioaddr); |
661 | outw(scp >> 16, ioaddr); |
662 | } |
663 | #endif |
664 | |
665 | lp->last_cmd = jiffies; |
666 | |
667 | #ifdef ENABLE_MVME16x_NET |
668 | if (MACH_IS_MVME16x) |
669 | lp->scp.sysbus = 0x00000054; |
670 | #endif |
671 | #ifdef ENABLE_BVME6000_NET |
672 | if (MACH_IS_BVME6000) |
673 | lp->scp.sysbus = 0x0000004c; |
674 | #endif |
675 | #ifdef ENABLE_APRICOT |
676 | if (MACH_IS_APRICOT) |
677 | lp->scp.sysbus = 0x00440000; |
678 | #endif |
679 | |
680 | lp->scp.iscp = WSWAPiscp(virt_to_bus((void *)&lp->iscp)); |
681 | lp->iscp.scb = WSWAPscb(virt_to_bus((void *)&lp->scb)); |
682 | lp->iscp.stat = ISCP_BUSY; |
683 | lp->cmd_backlog = 0; |
684 | |
685 | lp->cmd_head = lp->scb.cmd = I596_NULL; |
686 | |
687 | #ifdef ENABLE_BVME6000_NET |
688 | if (MACH_IS_BVME6000) { |
689 | lp->scb.t_on = 7 * 25; |
690 | lp->scb.t_off = 1 * 25; |
691 | } |
692 | #endif |
693 | |
694 | DEB(DEB_INIT,printk(KERN_DEBUG "%s: starting i82596.\n", dev->name)); |
695 | |
696 | #if defined(ENABLE_APRICOT) |
697 | (void) inb(ioaddr + 0x10); |
698 | outb(4, ioaddr + 0xf); |
699 | #endif |
700 | CA(dev); |
701 | |
702 | if (wait_istat(dev,lp,1000,"initialization timed out")) |
703 | goto failed; |
704 | DEB(DEB_INIT,printk(KERN_DEBUG "%s: i82596 initialization successful\n", dev->name)); |
705 | |
706 | /* Ensure rx frame/buffer descriptors are tidy */ |
707 | rebuild_rx_bufs(dev); |
708 | lp->scb.command = 0; |
709 | |
710 | #ifdef ENABLE_MVME16x_NET |
711 | if (MACH_IS_MVME16x) { |
712 | volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000; |
713 | |
714 | /* Enable ints, etc. now */ |
715 | pcc2[0x2a] = 0x55; /* Edge sensitive */ |
716 | pcc2[0x2b] = 0x15; |
717 | } |
718 | #endif |
719 | #ifdef ENABLE_BVME6000_NET |
720 | if (MACH_IS_BVME6000) { |
721 | volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG; |
722 | |
723 | *ethirq = 3; |
724 | } |
725 | #endif |
726 | |
727 | |
728 | DEB(DEB_INIT,printk(KERN_DEBUG "%s: queuing CmdConfigure\n", dev->name)); |
729 | memcpy(lp->cf_cmd.i596_config, init_setup, 14); |
730 | lp->cf_cmd.cmd.command = CmdConfigure; |
731 | i596_add_cmd(dev, &lp->cf_cmd.cmd); |
732 | |
733 | DEB(DEB_INIT,printk(KERN_DEBUG "%s: queuing CmdSASetup\n", dev->name)); |
734 | memcpy(lp->sa_cmd.eth_addr, dev->dev_addr, 6); |
735 | lp->sa_cmd.cmd.command = CmdSASetup; |
736 | i596_add_cmd(dev, &lp->sa_cmd.cmd); |
737 | |
738 | DEB(DEB_INIT,printk(KERN_DEBUG "%s: queuing CmdTDR\n", dev->name)); |
739 | lp->tdr_cmd.cmd.command = CmdTDR; |
740 | i596_add_cmd(dev, &lp->tdr_cmd.cmd); |
741 | |
742 | spin_lock_irqsave (&lp->lock, flags); |
743 | |
744 | if (wait_cmd(dev,lp,1000,"timed out waiting to issue RX_START")) { |
745 | spin_unlock_irqrestore (&lp->lock, flags); |
746 | goto failed; |
747 | } |
748 | DEB(DEB_INIT,printk(KERN_DEBUG "%s: Issuing RX_START\n", dev->name)); |
749 | lp->scb.command = RX_START; |
750 | CA(dev); |
751 | |
752 | spin_unlock_irqrestore (&lp->lock, flags); |
753 | |
754 | if (wait_cmd(dev,lp,1000,"RX_START not processed")) |
755 | goto failed; |
756 | DEB(DEB_INIT,printk(KERN_DEBUG "%s: Receive unit started OK\n", dev->name)); |
757 | return 0; |
758 | |
759 | failed: |
760 | printk(KERN_CRIT "%s: Failed to initialise 82596\n", dev->name); |
761 | MPU_PORT(dev, PORT_RESET, NULL); |
762 | return -1; |
763 | } |
764 | |
765 | static inline int i596_rx(struct net_device *dev) |
766 | { |
767 | struct i596_private *lp = dev->ml_priv; |
768 | struct i596_rfd *rfd; |
769 | struct i596_rbd *rbd; |
770 | int frames = 0; |
771 | |
772 | DEB(DEB_RXFRAME,printk(KERN_DEBUG "i596_rx(), rfd_head %p, rbd_head %p\n", |
773 | lp->rfd_head, lp->rbd_head)); |
774 | |
775 | rfd = lp->rfd_head; /* Ref next frame to check */ |
776 | |
777 | while ((rfd->stat) & STAT_C) { /* Loop while complete frames */ |
778 | if (rfd->rbd == I596_NULL) |
779 | rbd = I596_NULL; |
780 | else if (rfd->rbd == lp->rbd_head->b_addr) |
781 | rbd = lp->rbd_head; |
782 | else { |
783 | printk(KERN_CRIT "%s: rbd chain broken!\n", dev->name); |
784 | /* XXX Now what? */ |
785 | rbd = I596_NULL; |
786 | } |
787 | DEB(DEB_RXFRAME, printk(KERN_DEBUG " rfd %p, rfd.rbd %p, rfd.stat %04x\n", |
788 | rfd, rfd->rbd, rfd->stat)); |
789 | |
790 | if (rbd != I596_NULL && ((rfd->stat) & STAT_OK)) { |
791 | /* a good frame */ |
792 | int pkt_len = rbd->count & 0x3fff; |
793 | struct sk_buff *skb = rbd->skb; |
794 | int rx_in_place = 0; |
795 | |
796 | DEB(DEB_RXADDR,print_eth(rbd->v_data, "received")); |
797 | frames++; |
798 | |
799 | /* Check if the packet is long enough to just accept |
800 | * without copying to a properly sized skbuff. |
801 | */ |
802 | |
803 | if (pkt_len > rx_copybreak) { |
804 | struct sk_buff *newskb; |
805 | |
806 | /* Get fresh skbuff to replace filled one. */ |
807 | newskb = dev_alloc_skb(PKT_BUF_SZ); |
808 | if (newskb == NULL) { |
809 | skb = NULL; /* drop pkt */ |
810 | goto memory_squeeze; |
811 | } |
812 | /* Pass up the skb already on the Rx ring. */ |
813 | skb_put(skb, pkt_len); |
814 | rx_in_place = 1; |
815 | rbd->skb = newskb; |
816 | newskb->dev = dev; |
817 | rbd->v_data = newskb->data; |
818 | rbd->b_data = WSWAPchar(virt_to_bus(newskb->data)); |
819 | #ifdef __mc68000__ |
820 | cache_clear(virt_to_phys(newskb->data), PKT_BUF_SZ); |
821 | #endif |
822 | } |
823 | else |
824 | skb = dev_alloc_skb(pkt_len + 2); |
825 | memory_squeeze: |
826 | if (skb == NULL) { |
827 | /* XXX tulip.c can defer packets here!! */ |
828 | printk(KERN_WARNING "%s: i596_rx Memory squeeze, dropping packet.\n", dev->name); |
829 | dev->stats.rx_dropped++; |
830 | } |
831 | else { |
832 | if (!rx_in_place) { |
833 | /* 16 byte align the data fields */ |
834 | skb_reserve(skb, 2); |
835 | memcpy(skb_put(skb,pkt_len), rbd->v_data, pkt_len); |
836 | } |
837 | skb->protocol=eth_type_trans(skb,dev); |
838 | skb->len = pkt_len; |
839 | #ifdef __mc68000__ |
840 | cache_clear(virt_to_phys(rbd->skb->data), |
841 | pkt_len); |
842 | #endif |
843 | netif_rx(skb); |
844 | dev->stats.rx_packets++; |
845 | dev->stats.rx_bytes+=pkt_len; |
846 | } |
847 | } |
848 | else { |
849 | DEB(DEB_ERRORS, printk(KERN_DEBUG "%s: Error, rfd.stat = 0x%04x\n", |
850 | dev->name, rfd->stat)); |
851 | dev->stats.rx_errors++; |
852 | if ((rfd->stat) & 0x0001) |
853 | dev->stats.collisions++; |
854 | if ((rfd->stat) & 0x0080) |
855 | dev->stats.rx_length_errors++; |
856 | if ((rfd->stat) & 0x0100) |
857 | dev->stats.rx_over_errors++; |
858 | if ((rfd->stat) & 0x0200) |
859 | dev->stats.rx_fifo_errors++; |
860 | if ((rfd->stat) & 0x0400) |
861 | dev->stats.rx_frame_errors++; |
862 | if ((rfd->stat) & 0x0800) |
863 | dev->stats.rx_crc_errors++; |
864 | if ((rfd->stat) & 0x1000) |
865 | dev->stats.rx_length_errors++; |
866 | } |
867 | |
868 | /* Clear the buffer descriptor count and EOF + F flags */ |
869 | |
870 | if (rbd != I596_NULL && (rbd->count & 0x4000)) { |
871 | rbd->count = 0; |
872 | lp->rbd_head = rbd->v_next; |
873 | } |
874 | |
875 | /* Tidy the frame descriptor, marking it as end of list */ |
876 | |
877 | rfd->rbd = I596_NULL; |
878 | rfd->stat = 0; |
879 | rfd->cmd = CMD_EOL|CMD_FLEX; |
880 | rfd->count = 0; |
881 | |
882 | /* Remove end-of-list from old end descriptor */ |
883 | |
884 | rfd->v_prev->cmd = CMD_FLEX; |
885 | |
886 | /* Update record of next frame descriptor to process */ |
887 | |
888 | lp->scb.rfd = rfd->b_next; |
889 | lp->rfd_head = rfd->v_next; |
890 | rfd = lp->rfd_head; |
891 | } |
892 | |
893 | DEB(DEB_RXFRAME,printk(KERN_DEBUG "frames %d\n", frames)); |
894 | |
895 | return 0; |
896 | } |
897 | |
898 | |
899 | static void i596_cleanup_cmd(struct net_device *dev, struct i596_private *lp) |
900 | { |
901 | struct i596_cmd *ptr; |
902 | |
903 | while (lp->cmd_head != I596_NULL) { |
904 | ptr = lp->cmd_head; |
905 | lp->cmd_head = ptr->v_next; |
906 | lp->cmd_backlog--; |
907 | |
908 | switch ((ptr->command) & 0x7) { |
909 | case CmdTx: |
910 | { |
911 | struct tx_cmd *tx_cmd = (struct tx_cmd *) ptr; |
912 | struct sk_buff *skb = tx_cmd->skb; |
913 | |
914 | dev_kfree_skb(skb); |
915 | |
916 | dev->stats.tx_errors++; |
917 | dev->stats.tx_aborted_errors++; |
918 | |
919 | ptr->v_next = ptr->b_next = I596_NULL; |
920 | tx_cmd->cmd.command = 0; /* Mark as free */ |
921 | break; |
922 | } |
923 | default: |
924 | ptr->v_next = ptr->b_next = I596_NULL; |
925 | } |
926 | } |
927 | |
928 | wait_cmd(dev,lp,100,"i596_cleanup_cmd timed out"); |
929 | lp->scb.cmd = I596_NULL; |
930 | } |
931 | |
932 | static void i596_reset(struct net_device *dev, struct i596_private *lp, |
933 | int ioaddr) |
934 | { |
935 | unsigned long flags; |
936 | |
937 | DEB(DEB_RESET,printk(KERN_DEBUG "i596_reset\n")); |
938 | |
939 | spin_lock_irqsave (&lp->lock, flags); |
940 | |
941 | wait_cmd(dev,lp,100,"i596_reset timed out"); |
942 | |
943 | netif_stop_queue(dev); |
944 | |
945 | lp->scb.command = CUC_ABORT | RX_ABORT; |
946 | CA(dev); |
947 | |
948 | /* wait for shutdown */ |
949 | wait_cmd(dev,lp,1000,"i596_reset 2 timed out"); |
950 | spin_unlock_irqrestore (&lp->lock, flags); |
951 | |
952 | i596_cleanup_cmd(dev,lp); |
953 | i596_rx(dev); |
954 | |
955 | netif_start_queue(dev); |
956 | init_i596_mem(dev); |
957 | } |
958 | |
959 | static void i596_add_cmd(struct net_device *dev, struct i596_cmd *cmd) |
960 | { |
961 | struct i596_private *lp = dev->ml_priv; |
962 | int ioaddr = dev->base_addr; |
963 | unsigned long flags; |
964 | |
965 | DEB(DEB_ADDCMD,printk(KERN_DEBUG "i596_add_cmd\n")); |
966 | |
967 | cmd->status = 0; |
968 | cmd->command |= (CMD_EOL | CMD_INTR); |
969 | cmd->v_next = cmd->b_next = I596_NULL; |
970 | |
971 | spin_lock_irqsave (&lp->lock, flags); |
972 | |
973 | if (lp->cmd_head != I596_NULL) { |
974 | lp->cmd_tail->v_next = cmd; |
975 | lp->cmd_tail->b_next = WSWAPcmd(virt_to_bus(&cmd->status)); |
976 | } else { |
977 | lp->cmd_head = cmd; |
978 | wait_cmd(dev,lp,100,"i596_add_cmd timed out"); |
979 | lp->scb.cmd = WSWAPcmd(virt_to_bus(&cmd->status)); |
980 | lp->scb.command = CUC_START; |
981 | CA(dev); |
982 | } |
983 | lp->cmd_tail = cmd; |
984 | lp->cmd_backlog++; |
985 | |
986 | spin_unlock_irqrestore (&lp->lock, flags); |
987 | |
988 | if (lp->cmd_backlog > max_cmd_backlog) { |
989 | unsigned long tickssofar = jiffies - lp->last_cmd; |
990 | |
991 | if (tickssofar < ticks_limit) |
992 | return; |
993 | |
994 | printk(KERN_NOTICE "%s: command unit timed out, status resetting.\n", dev->name); |
995 | |
996 | i596_reset(dev, lp, ioaddr); |
997 | } |
998 | } |
999 | |
1000 | static int i596_open(struct net_device *dev) |
1001 | { |
1002 | int res = 0; |
1003 | |
1004 | DEB(DEB_OPEN,printk(KERN_DEBUG "%s: i596_open() irq %d.\n", dev->name, dev->irq)); |
1005 | |
1006 | if (request_irq(dev->irq, i596_interrupt, 0, "i82596", dev)) { |
1007 | printk(KERN_ERR "%s: IRQ %d not free\n", dev->name, dev->irq); |
1008 | return -EAGAIN; |
1009 | } |
1010 | #ifdef ENABLE_MVME16x_NET |
1011 | if (MACH_IS_MVME16x) { |
1012 | if (request_irq(0x56, i596_error, 0, "i82596_error", dev)) |
1013 | return -EAGAIN; |
1014 | } |
1015 | #endif |
1016 | init_rx_bufs(dev); |
1017 | |
1018 | netif_start_queue(dev); |
1019 | |
1020 | /* Initialize the 82596 memory */ |
1021 | if (init_i596_mem(dev)) { |
1022 | res = -EAGAIN; |
1023 | free_irq(dev->irq, dev); |
1024 | } |
1025 | |
1026 | return res; |
1027 | } |
1028 | |
1029 | static void i596_tx_timeout (struct net_device *dev) |
1030 | { |
1031 | struct i596_private *lp = dev->ml_priv; |
1032 | int ioaddr = dev->base_addr; |
1033 | |
1034 | /* Transmitter timeout, serious problems. */ |
1035 | DEB(DEB_ERRORS,printk(KERN_ERR "%s: transmit timed out, status resetting.\n", |
1036 | dev->name)); |
1037 | |
1038 | dev->stats.tx_errors++; |
1039 | |
1040 | /* Try to restart the adaptor */ |
1041 | if (lp->last_restart == dev->stats.tx_packets) { |
1042 | DEB(DEB_ERRORS,printk(KERN_ERR "Resetting board.\n")); |
1043 | /* Shutdown and restart */ |
1044 | i596_reset (dev, lp, ioaddr); |
1045 | } else { |
1046 | /* Issue a channel attention signal */ |
1047 | DEB(DEB_ERRORS,printk(KERN_ERR "Kicking board.\n")); |
1048 | lp->scb.command = CUC_START | RX_START; |
1049 | CA (dev); |
1050 | lp->last_restart = dev->stats.tx_packets; |
1051 | } |
1052 | |
1053 | dev->trans_start = jiffies; |
1054 | netif_wake_queue (dev); |
1055 | } |
1056 | |
1057 | static netdev_tx_t i596_start_xmit(struct sk_buff *skb, struct net_device *dev) |
1058 | { |
1059 | struct i596_private *lp = dev->ml_priv; |
1060 | struct tx_cmd *tx_cmd; |
1061 | struct i596_tbd *tbd; |
1062 | short length = skb->len; |
1063 | dev->trans_start = jiffies; |
1064 | |
1065 | DEB(DEB_STARTTX,printk(KERN_DEBUG "%s: i596_start_xmit(%x,%p) called\n", |
1066 | dev->name, skb->len, skb->data)); |
1067 | |
1068 | if (skb->len < ETH_ZLEN) { |
1069 | if (skb_padto(skb, ETH_ZLEN)) |
1070 | return NETDEV_TX_OK; |
1071 | length = ETH_ZLEN; |
1072 | } |
1073 | netif_stop_queue(dev); |
1074 | |
1075 | tx_cmd = lp->tx_cmds + lp->next_tx_cmd; |
1076 | tbd = lp->tbds + lp->next_tx_cmd; |
1077 | |
1078 | if (tx_cmd->cmd.command) { |
1079 | printk(KERN_NOTICE "%s: xmit ring full, dropping packet.\n", |
1080 | dev->name); |
1081 | dev->stats.tx_dropped++; |
1082 | |
1083 | dev_kfree_skb(skb); |
1084 | } else { |
1085 | if (++lp->next_tx_cmd == TX_RING_SIZE) |
1086 | lp->next_tx_cmd = 0; |
1087 | tx_cmd->tbd = WSWAPtbd(virt_to_bus(tbd)); |
1088 | tbd->next = I596_NULL; |
1089 | |
1090 | tx_cmd->cmd.command = CMD_FLEX | CmdTx; |
1091 | tx_cmd->skb = skb; |
1092 | |
1093 | tx_cmd->pad = 0; |
1094 | tx_cmd->size = 0; |
1095 | tbd->pad = 0; |
1096 | tbd->size = EOF | length; |
1097 | |
1098 | tbd->data = WSWAPchar(virt_to_bus(skb->data)); |
1099 | |
1100 | #ifdef __mc68000__ |
1101 | cache_push(virt_to_phys(skb->data), length); |
1102 | #endif |
1103 | DEB(DEB_TXADDR,print_eth(skb->data, "tx-queued")); |
1104 | i596_add_cmd(dev, &tx_cmd->cmd); |
1105 | |
1106 | dev->stats.tx_packets++; |
1107 | dev->stats.tx_bytes += length; |
1108 | } |
1109 | |
1110 | netif_start_queue(dev); |
1111 | |
1112 | return NETDEV_TX_OK; |
1113 | } |
1114 | |
1115 | static void print_eth(unsigned char *add, char *str) |
1116 | { |
1117 | printk(KERN_DEBUG "i596 0x%p, %pM --> %pM %02X%02X, %s\n", |
1118 | add, add + 6, add, add[12], add[13], str); |
1119 | } |
1120 | |
1121 | static int io = 0x300; |
1122 | static int irq = 10; |
1123 | |
1124 | static const struct net_device_ops i596_netdev_ops = { |
1125 | .ndo_open = i596_open, |
1126 | .ndo_stop = i596_close, |
1127 | .ndo_start_xmit = i596_start_xmit, |
1128 | .ndo_set_multicast_list = set_multicast_list, |
1129 | .ndo_tx_timeout = i596_tx_timeout, |
1130 | .ndo_change_mtu = eth_change_mtu, |
1131 | .ndo_set_mac_address = eth_mac_addr, |
1132 | .ndo_validate_addr = eth_validate_addr, |
1133 | }; |
1134 | |
1135 | struct net_device * __init i82596_probe(int unit) |
1136 | { |
1137 | struct net_device *dev; |
1138 | int i; |
1139 | struct i596_private *lp; |
1140 | char eth_addr[8]; |
1141 | static int probed; |
1142 | int err; |
1143 | |
1144 | if (probed) |
1145 | return ERR_PTR(-ENODEV); |
1146 | probed++; |
1147 | |
1148 | dev = alloc_etherdev(0); |
1149 | if (!dev) |
1150 | return ERR_PTR(-ENOMEM); |
1151 | |
1152 | if (unit >= 0) { |
1153 | sprintf(dev->name, "eth%d", unit); |
1154 | netdev_boot_setup_check(dev); |
1155 | } else { |
1156 | dev->base_addr = io; |
1157 | dev->irq = irq; |
1158 | } |
1159 | |
1160 | #ifdef ENABLE_MVME16x_NET |
1161 | if (MACH_IS_MVME16x) { |
1162 | if (mvme16x_config & MVME16x_CONFIG_NO_ETHERNET) { |
1163 | printk(KERN_NOTICE "Ethernet probe disabled - chip not present\n"); |
1164 | err = -ENODEV; |
1165 | goto out; |
1166 | } |
1167 | memcpy(eth_addr, (void *) 0xfffc1f2c, 6); /* YUCK! Get addr from NOVRAM */ |
1168 | dev->base_addr = MVME_I596_BASE; |
1169 | dev->irq = (unsigned) MVME16x_IRQ_I596; |
1170 | goto found; |
1171 | } |
1172 | #endif |
1173 | #ifdef ENABLE_BVME6000_NET |
1174 | if (MACH_IS_BVME6000) { |
1175 | volatile unsigned char *rtc = (unsigned char *) BVME_RTC_BASE; |
1176 | unsigned char msr = rtc[3]; |
1177 | int i; |
1178 | |
1179 | rtc[3] |= 0x80; |
1180 | for (i = 0; i < 6; i++) |
1181 | eth_addr[i] = rtc[i * 4 + 7]; /* Stored in RTC RAM at offset 1 */ |
1182 | rtc[3] = msr; |
1183 | dev->base_addr = BVME_I596_BASE; |
1184 | dev->irq = (unsigned) BVME_IRQ_I596; |
1185 | goto found; |
1186 | } |
1187 | #endif |
1188 | #ifdef ENABLE_APRICOT |
1189 | { |
1190 | int checksum = 0; |
1191 | int ioaddr = 0x300; |
1192 | |
1193 | /* this is easy the ethernet interface can only be at 0x300 */ |
1194 | /* first check nothing is already registered here */ |
1195 | |
1196 | if (!request_region(ioaddr, I596_TOTAL_SIZE, DRV_NAME)) { |
1197 | printk(KERN_ERR "82596: IO address 0x%04x in use\n", ioaddr); |
1198 | err = -EBUSY; |
1199 | goto out; |
1200 | } |
1201 | |
1202 | dev->base_addr = ioaddr; |
1203 | |
1204 | for (i = 0; i < 8; i++) { |
1205 | eth_addr[i] = inb(ioaddr + 8 + i); |
1206 | checksum += eth_addr[i]; |
1207 | } |
1208 | |
1209 | /* checksum is a multiple of 0x100, got this wrong first time |
1210 | some machines have 0x100, some 0x200. The DOS driver doesn't |
1211 | even bother with the checksum. |
1212 | Some other boards trip the checksum.. but then appear as |
1213 | ether address 0. Trap these - AC */ |
1214 | |
1215 | if ((checksum % 0x100) || |
1216 | (memcmp(eth_addr, "\x00\x00\x49", 3) != 0)) { |
1217 | err = -ENODEV; |
1218 | goto out1; |
1219 | } |
1220 | |
1221 | dev->irq = 10; |
1222 | goto found; |
1223 | } |
1224 | #endif |
1225 | err = -ENODEV; |
1226 | goto out; |
1227 | |
1228 | found: |
1229 | dev->mem_start = (int)__get_free_pages(GFP_ATOMIC, 0); |
1230 | if (!dev->mem_start) { |
1231 | err = -ENOMEM; |
1232 | goto out1; |
1233 | } |
1234 | |
1235 | DEB(DEB_PROBE,printk(KERN_INFO "%s: 82596 at %#3lx,", dev->name, dev->base_addr)); |
1236 | |
1237 | for (i = 0; i < 6; i++) |
1238 | DEB(DEB_PROBE,printk(" %2.2X", dev->dev_addr[i] = eth_addr[i])); |
1239 | |
1240 | DEB(DEB_PROBE,printk(" IRQ %d.\n", dev->irq)); |
1241 | |
1242 | DEB(DEB_PROBE,printk(KERN_INFO "%s", version)); |
1243 | |
1244 | /* The 82596-specific entries in the device structure. */ |
1245 | dev->netdev_ops = &i596_netdev_ops; |
1246 | dev->watchdog_timeo = TX_TIMEOUT; |
1247 | |
1248 | dev->ml_priv = (void *)(dev->mem_start); |
1249 | |
1250 | lp = dev->ml_priv; |
1251 | DEB(DEB_INIT,printk(KERN_DEBUG "%s: lp at 0x%08lx (%zd bytes), " |
1252 | "lp->scb at 0x%08lx\n", |
1253 | dev->name, (unsigned long)lp, |
1254 | sizeof(struct i596_private), (unsigned long)&lp->scb)); |
1255 | memset((void *) lp, 0, sizeof(struct i596_private)); |
1256 | |
1257 | #ifdef __mc68000__ |
1258 | cache_push(virt_to_phys((void *)(dev->mem_start)), 4096); |
1259 | cache_clear(virt_to_phys((void *)(dev->mem_start)), 4096); |
1260 | kernel_set_cachemode((void *)(dev->mem_start), 4096, IOMAP_NOCACHE_SER); |
1261 | #endif |
1262 | lp->scb.command = 0; |
1263 | lp->scb.cmd = I596_NULL; |
1264 | lp->scb.rfd = I596_NULL; |
1265 | spin_lock_init(&lp->lock); |
1266 | |
1267 | err = register_netdev(dev); |
1268 | if (err) |
1269 | goto out2; |
1270 | return dev; |
1271 | out2: |
1272 | #ifdef __mc68000__ |
1273 | /* XXX This assumes default cache mode to be IOMAP_FULL_CACHING, |
1274 | * XXX which may be invalid (CONFIG_060_WRITETHROUGH) |
1275 | */ |
1276 | kernel_set_cachemode((void *)(dev->mem_start), 4096, |
1277 | IOMAP_FULL_CACHING); |
1278 | #endif |
1279 | free_page ((u32)(dev->mem_start)); |
1280 | out1: |
1281 | #ifdef ENABLE_APRICOT |
1282 | release_region(dev->base_addr, I596_TOTAL_SIZE); |
1283 | #endif |
1284 | out: |
1285 | free_netdev(dev); |
1286 | return ERR_PTR(err); |
1287 | } |
1288 | |
1289 | static irqreturn_t i596_interrupt(int irq, void *dev_id) |
1290 | { |
1291 | struct net_device *dev = dev_id; |
1292 | struct i596_private *lp; |
1293 | short ioaddr; |
1294 | unsigned short status, ack_cmd = 0; |
1295 | int handled = 0; |
1296 | |
1297 | #ifdef ENABLE_BVME6000_NET |
1298 | if (MACH_IS_BVME6000) { |
1299 | if (*(char *) BVME_LOCAL_IRQ_STAT & BVME_ETHERR) { |
1300 | i596_error(irq, dev_id); |
1301 | return IRQ_HANDLED; |
1302 | } |
1303 | } |
1304 | #endif |
1305 | if (dev == NULL) { |
1306 | printk(KERN_ERR "i596_interrupt(): irq %d for unknown device.\n", irq); |
1307 | return IRQ_NONE; |
1308 | } |
1309 | |
1310 | ioaddr = dev->base_addr; |
1311 | lp = dev->ml_priv; |
1312 | |
1313 | spin_lock (&lp->lock); |
1314 | |
1315 | wait_cmd(dev,lp,100,"i596 interrupt, timeout"); |
1316 | status = lp->scb.status; |
1317 | |
1318 | DEB(DEB_INTS,printk(KERN_DEBUG "%s: i596 interrupt, IRQ %d, status %4.4x.\n", |
1319 | dev->name, irq, status)); |
1320 | |
1321 | ack_cmd = status & 0xf000; |
1322 | |
1323 | if ((status & 0x8000) || (status & 0x2000)) { |
1324 | struct i596_cmd *ptr; |
1325 | |
1326 | handled = 1; |
1327 | if ((status & 0x8000)) |
1328 | DEB(DEB_INTS,printk(KERN_DEBUG "%s: i596 interrupt completed command.\n", dev->name)); |
1329 | if ((status & 0x2000)) |
1330 | DEB(DEB_INTS,printk(KERN_DEBUG "%s: i596 interrupt command unit inactive %x.\n", dev->name, status & 0x0700)); |
1331 | |
1332 | while ((lp->cmd_head != I596_NULL) && (lp->cmd_head->status & STAT_C)) { |
1333 | ptr = lp->cmd_head; |
1334 | |
1335 | DEB(DEB_STATUS,printk(KERN_DEBUG "cmd_head->status = %04x, ->command = %04x\n", |
1336 | lp->cmd_head->status, lp->cmd_head->command)); |
1337 | lp->cmd_head = ptr->v_next; |
1338 | lp->cmd_backlog--; |
1339 | |
1340 | switch ((ptr->command) & 0x7) { |
1341 | case CmdTx: |
1342 | { |
1343 | struct tx_cmd *tx_cmd = (struct tx_cmd *) ptr; |
1344 | struct sk_buff *skb = tx_cmd->skb; |
1345 | |
1346 | if ((ptr->status) & STAT_OK) { |
1347 | DEB(DEB_TXADDR,print_eth(skb->data, "tx-done")); |
1348 | } else { |
1349 | dev->stats.tx_errors++; |
1350 | if ((ptr->status) & 0x0020) |
1351 | dev->stats.collisions++; |
1352 | if (!((ptr->status) & 0x0040)) |
1353 | dev->stats.tx_heartbeat_errors++; |
1354 | if ((ptr->status) & 0x0400) |
1355 | dev->stats.tx_carrier_errors++; |
1356 | if ((ptr->status) & 0x0800) |
1357 | dev->stats.collisions++; |
1358 | if ((ptr->status) & 0x1000) |
1359 | dev->stats.tx_aborted_errors++; |
1360 | } |
1361 | |
1362 | dev_kfree_skb_irq(skb); |
1363 | |
1364 | tx_cmd->cmd.command = 0; /* Mark free */ |
1365 | break; |
1366 | } |
1367 | case CmdTDR: |
1368 | { |
1369 | unsigned short status = ((struct tdr_cmd *)ptr)->status; |
1370 | |
1371 | if (status & 0x8000) { |
1372 | DEB(DEB_TDR,printk(KERN_INFO "%s: link ok.\n", dev->name)); |
1373 | } else { |
1374 | if (status & 0x4000) |
1375 | printk(KERN_ERR "%s: Transceiver problem.\n", dev->name); |
1376 | if (status & 0x2000) |
1377 | printk(KERN_ERR "%s: Termination problem.\n", dev->name); |
1378 | if (status & 0x1000) |
1379 | printk(KERN_ERR "%s: Short circuit.\n", dev->name); |
1380 | |
1381 | DEB(DEB_TDR,printk(KERN_INFO "%s: Time %d.\n", dev->name, status & 0x07ff)); |
1382 | } |
1383 | break; |
1384 | } |
1385 | case CmdConfigure: |
1386 | case CmdMulticastList: |
1387 | /* Zap command so set_multicast_list() knows it is free */ |
1388 | ptr->command = 0; |
1389 | break; |
1390 | } |
1391 | ptr->v_next = ptr->b_next = I596_NULL; |
1392 | lp->last_cmd = jiffies; |
1393 | } |
1394 | |
1395 | ptr = lp->cmd_head; |
1396 | while ((ptr != I596_NULL) && (ptr != lp->cmd_tail)) { |
1397 | ptr->command &= 0x1fff; |
1398 | ptr = ptr->v_next; |
1399 | } |
1400 | |
1401 | if ((lp->cmd_head != I596_NULL)) |
1402 | ack_cmd |= CUC_START; |
1403 | lp->scb.cmd = WSWAPcmd(virt_to_bus(&lp->cmd_head->status)); |
1404 | } |
1405 | if ((status & 0x1000) || (status & 0x4000)) { |
1406 | if ((status & 0x4000)) |
1407 | DEB(DEB_INTS,printk(KERN_DEBUG "%s: i596 interrupt received a frame.\n", dev->name)); |
1408 | i596_rx(dev); |
1409 | /* Only RX_START if stopped - RGH 07-07-96 */ |
1410 | if (status & 0x1000) { |
1411 | if (netif_running(dev)) { |
1412 | DEB(DEB_ERRORS,printk(KERN_ERR "%s: i596 interrupt receive unit inactive, status 0x%x\n", dev->name, status)); |
1413 | ack_cmd |= RX_START; |
1414 | dev->stats.rx_errors++; |
1415 | dev->stats.rx_fifo_errors++; |
1416 | rebuild_rx_bufs(dev); |
1417 | } |
1418 | } |
1419 | } |
1420 | wait_cmd(dev,lp,100,"i596 interrupt, timeout"); |
1421 | lp->scb.command = ack_cmd; |
1422 | |
1423 | #ifdef ENABLE_MVME16x_NET |
1424 | if (MACH_IS_MVME16x) { |
1425 | /* Ack the interrupt */ |
1426 | |
1427 | volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000; |
1428 | |
1429 | pcc2[0x2a] |= 0x08; |
1430 | } |
1431 | #endif |
1432 | #ifdef ENABLE_BVME6000_NET |
1433 | if (MACH_IS_BVME6000) { |
1434 | volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG; |
1435 | |
1436 | *ethirq = 1; |
1437 | *ethirq = 3; |
1438 | } |
1439 | #endif |
1440 | #ifdef ENABLE_APRICOT |
1441 | (void) inb(ioaddr + 0x10); |
1442 | outb(4, ioaddr + 0xf); |
1443 | #endif |
1444 | CA(dev); |
1445 | |
1446 | DEB(DEB_INTS,printk(KERN_DEBUG "%s: exiting interrupt.\n", dev->name)); |
1447 | |
1448 | spin_unlock (&lp->lock); |
1449 | return IRQ_RETVAL(handled); |
1450 | } |
1451 | |
1452 | static int i596_close(struct net_device *dev) |
1453 | { |
1454 | struct i596_private *lp = dev->ml_priv; |
1455 | unsigned long flags; |
1456 | |
1457 | netif_stop_queue(dev); |
1458 | |
1459 | DEB(DEB_INIT,printk(KERN_DEBUG "%s: Shutting down ethercard, status was %4.4x.\n", |
1460 | dev->name, lp->scb.status)); |
1461 | |
1462 | spin_lock_irqsave(&lp->lock, flags); |
1463 | |
1464 | wait_cmd(dev,lp,100,"close1 timed out"); |
1465 | lp->scb.command = CUC_ABORT | RX_ABORT; |
1466 | CA(dev); |
1467 | |
1468 | wait_cmd(dev,lp,100,"close2 timed out"); |
1469 | |
1470 | spin_unlock_irqrestore(&lp->lock, flags); |
1471 | DEB(DEB_STRUCT,i596_display_data(dev)); |
1472 | i596_cleanup_cmd(dev,lp); |
1473 | |
1474 | #ifdef ENABLE_MVME16x_NET |
1475 | if (MACH_IS_MVME16x) { |
1476 | volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000; |
1477 | |
1478 | /* Disable all ints */ |
1479 | pcc2[0x28] = 1; |
1480 | pcc2[0x2a] = 0x40; |
1481 | pcc2[0x2b] = 0x40; /* Set snooping bits now! */ |
1482 | } |
1483 | #endif |
1484 | #ifdef ENABLE_BVME6000_NET |
1485 | if (MACH_IS_BVME6000) { |
1486 | volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG; |
1487 | |
1488 | *ethirq = 1; |
1489 | } |
1490 | #endif |
1491 | |
1492 | free_irq(dev->irq, dev); |
1493 | remove_rx_bufs(dev); |
1494 | |
1495 | return 0; |
1496 | } |
1497 | |
1498 | /* |
1499 | * Set or clear the multicast filter for this adaptor. |
1500 | */ |
1501 | |
1502 | static void set_multicast_list(struct net_device *dev) |
1503 | { |
1504 | struct i596_private *lp = dev->ml_priv; |
1505 | int config = 0, cnt; |
1506 | |
1507 | DEB(DEB_MULTI,printk(KERN_DEBUG "%s: set multicast list, %d entries, promisc %s, allmulti %s\n", |
1508 | dev->name, netdev_mc_count(dev), |
1509 | dev->flags & IFF_PROMISC ? "ON" : "OFF", |
1510 | dev->flags & IFF_ALLMULTI ? "ON" : "OFF")); |
1511 | |
1512 | if (wait_cfg(dev, &lp->cf_cmd.cmd, 1000, "config change request timed out")) |
1513 | return; |
1514 | |
1515 | if ((dev->flags & IFF_PROMISC) && !(lp->cf_cmd.i596_config[8] & 0x01)) { |
1516 | lp->cf_cmd.i596_config[8] |= 0x01; |
1517 | config = 1; |
1518 | } |
1519 | if (!(dev->flags & IFF_PROMISC) && (lp->cf_cmd.i596_config[8] & 0x01)) { |
1520 | lp->cf_cmd.i596_config[8] &= ~0x01; |
1521 | config = 1; |
1522 | } |
1523 | if ((dev->flags & IFF_ALLMULTI) && (lp->cf_cmd.i596_config[11] & 0x20)) { |
1524 | lp->cf_cmd.i596_config[11] &= ~0x20; |
1525 | config = 1; |
1526 | } |
1527 | if (!(dev->flags & IFF_ALLMULTI) && !(lp->cf_cmd.i596_config[11] & 0x20)) { |
1528 | lp->cf_cmd.i596_config[11] |= 0x20; |
1529 | config = 1; |
1530 | } |
1531 | if (config) { |
1532 | lp->cf_cmd.cmd.command = CmdConfigure; |
1533 | i596_add_cmd(dev, &lp->cf_cmd.cmd); |
1534 | } |
1535 | |
1536 | cnt = netdev_mc_count(dev); |
1537 | if (cnt > MAX_MC_CNT) |
1538 | { |
1539 | cnt = MAX_MC_CNT; |
1540 | printk(KERN_ERR "%s: Only %d multicast addresses supported", |
1541 | dev->name, cnt); |
1542 | } |
1543 | |
1544 | if (!netdev_mc_empty(dev)) { |
1545 | struct dev_mc_list *dmi; |
1546 | unsigned char *cp; |
1547 | struct mc_cmd *cmd; |
1548 | |
1549 | if (wait_cfg(dev, &lp->mc_cmd.cmd, 1000, "multicast list change request timed out")) |
1550 | return; |
1551 | cmd = &lp->mc_cmd; |
1552 | cmd->cmd.command = CmdMulticastList; |
1553 | cmd->mc_cnt = cnt * ETH_ALEN; |
1554 | cp = cmd->mc_addrs; |
1555 | netdev_for_each_mc_addr(dmi, dev) { |
1556 | if (!cnt--) |
1557 | break; |
1558 | memcpy(cp, dmi->dmi_addr, ETH_ALEN); |
1559 | if (i596_debug > 1) |
1560 | DEB(DEB_MULTI,printk(KERN_INFO "%s: Adding address %pM\n", |
1561 | dev->name, cp)); |
1562 | cp += ETH_ALEN; |
1563 | } |
1564 | i596_add_cmd(dev, &cmd->cmd); |
1565 | } |
1566 | } |
1567 | |
1568 | #ifdef MODULE |
1569 | static struct net_device *dev_82596; |
1570 | |
1571 | #ifdef ENABLE_APRICOT |
1572 | module_param(irq, int, 0); |
1573 | MODULE_PARM_DESC(irq, "Apricot IRQ number"); |
1574 | #endif |
1575 | |
1576 | static int debug = -1; |
1577 | module_param(debug, int, 0); |
1578 | MODULE_PARM_DESC(debug, "i82596 debug mask"); |
1579 | |
1580 | int __init init_module(void) |
1581 | { |
1582 | if (debug >= 0) |
1583 | i596_debug = debug; |
1584 | dev_82596 = i82596_probe(-1); |
1585 | if (IS_ERR(dev_82596)) |
1586 | return PTR_ERR(dev_82596); |
1587 | return 0; |
1588 | } |
1589 | |
1590 | void __exit cleanup_module(void) |
1591 | { |
1592 | unregister_netdev(dev_82596); |
1593 | #ifdef __mc68000__ |
1594 | /* XXX This assumes default cache mode to be IOMAP_FULL_CACHING, |
1595 | * XXX which may be invalid (CONFIG_060_WRITETHROUGH) |
1596 | */ |
1597 | |
1598 | kernel_set_cachemode((void *)(dev_82596->mem_start), 4096, |
1599 | IOMAP_FULL_CACHING); |
1600 | #endif |
1601 | free_page ((u32)(dev_82596->mem_start)); |
1602 | #ifdef ENABLE_APRICOT |
1603 | /* If we don't do this, we can't re-insmod it later. */ |
1604 | release_region(dev_82596->base_addr, I596_TOTAL_SIZE); |
1605 | #endif |
1606 | free_netdev(dev_82596); |
1607 | } |
1608 | |
1609 | #endif /* MODULE */ |
1610 |
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