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SUNHME: Fix missing NETIF_F_VLAN_CHALLENGED on PCI happy meals
[deliverable/linux.git] / drivers / net / 82596.c
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1da177e4
LT		 1/* 82596.c: A generic 82596 ethernet driver for linux. */
2/*
3 Based on Apricot.c
4 Written 1994 by Mark Evans.
5 This driver is for the Apricot 82596 bus-master interface
6
7 Modularised 12/94 Mark Evans
8
9
10 Modified to support the 82596 ethernet chips on 680x0 VME boards.
11 by Richard Hirst <richard@sleepie.demon.co.uk>
12 Renamed to be 82596.c
13
14 980825: Changed to receive directly in to sk_buffs which are
15 allocated at open() time. Eliminates copy on incoming frames
16 (small ones are still copied). Shared data now held in a
17 non-cached page, so we can run on 68060 in copyback mode.
18
19 TBD:
20 * look at deferring rx frames rather than discarding (as per tulip)
21 * handle tx ring full as per tulip
22 * performace test to tune rx_copybreak
23
24 Most of my modifications relate to the braindead big-endian
25 implementation by Intel. When the i596 is operating in
26 'big-endian' mode, it thinks a 32 bit value of 0x12345678
27 should be stored as 0x56781234. This is a real pain, when
28 you have linked lists which are shared by the 680x0 and the
29 i596.
30
31 Driver skeleton
32 Written 1993 by Donald Becker.
33 Copyright 1993 United States Government as represented by the Director,
34 National Security Agency. This software may only be used and distributed
35 according to the terms of the GNU General Public License as modified by SRC,
36 incorporated herein by reference.
37
38 The author may be reached as becker@scyld.com, or C/O
39 Scyld Computing Corporation, 410 Severn Ave., Suite 210, Annapolis MD 21403
40
41 */
42
1da177e4
LT		 43#include <linux/module.h>
44#include <linux/kernel.h>
45#include <linux/string.h>
46#include <linux/errno.h>
47#include <linux/ioport.h>
48#include <linux/slab.h>
49#include <linux/interrupt.h>
50#include <linux/delay.h>
51#include <linux/netdevice.h>
52#include <linux/etherdevice.h>
53#include <linux/skbuff.h>
54#include <linux/init.h>
55#include <linux/bitops.h>
56
57#include <asm/io.h>
58#include <asm/dma.h>
59#include <asm/pgtable.h>
88accb49 60#include <asm/cacheflush.h>
1da177e4
LT		 61
62static 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 *)(x))
126#define WSWAPrbd(x) ((struct i596_rbd *)(x))
127#define WSWAPiscp(x) ((struct i596_iscp *)(x))
128#define WSWAPscb(x) ((struct i596_scb *)(x))
129#define WSWAPcmd(x) ((struct i596_cmd *)(x))
130#define WSWAPtbd(x) ((struct i596_tbd *)(x))
131#define WSWAPchar(x) ((char *)(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
147static int i596_debug = (DEB_SERIOUS|DEB_PROBE);
148
149MODULE_AUTHOR("Richard Hirst");
150MODULE_DESCRIPTION("i82596 driver");
151MODULE_LICENSE("GPL");
152
153module_param(i596_debug, int, 0);
154MODULE_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 */
160static 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
175enum 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
197struct 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
206struct 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
223struct 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
230struct 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
238struct tdr_cmd {
239 struct i596_cmd cmd;
240 unsigned short status;
241 unsigned short pad;
242};
243
244struct mc_cmd {
245 struct i596_cmd cmd;
246 short mc_cnt;
247 char mc_addrs[MAX_MC_CNT*6];
248};
249
250struct sa_cmd {
251 struct i596_cmd cmd;
252 char eth_addr[8];
253};
254
255struct cf_cmd {
256 struct i596_cmd cmd;
257 char i596_config[16];
258};
259
260struct 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
271struct 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
287struct 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
302struct i596_iscp {
303 unsigned long stat;
304 struct i596_scb *scb;
305};
306
307struct i596_scp {
308 unsigned long sysbus;
309 unsigned long pad;
310 struct i596_iscp *iscp;
311};
312
313struct 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;
1da177e4
LT		 329 struct i596_rfd rfds[RX_RING_SIZE];
330 struct i596_rbd rbds[RX_RING_SIZE];
331 struct tx_cmd tx_cmds[TX_RING_SIZE];
332 struct i596_tbd tbds[TX_RING_SIZE];
333 int next_tx_cmd;
334 spinlock_t lock;
335};
336
337static char init_setup[] =
338{
339 0x8E, /* length, prefetch on */
340 0xC8, /* fifo to 8, monitor off */
341#ifdef CONFIG_VME
342 0xc0, /* don't save bad frames */
343#else
344 0x80, /* don't save bad frames */
345#endif
346 0x2E, /* No source address insertion, 8 byte preamble */
347 0x00, /* priority and backoff defaults */
348 0x60, /* interframe spacing */
349 0x00, /* slot time LSB */
350 0xf2, /* slot time and retries */
351 0x00, /* promiscuous mode */
352 0x00, /* collision detect */
353 0x40, /* minimum frame length */
354 0xff,
355 0x00,
356 0x7f /* *multi IA */ };
357
358static int i596_open(struct net_device *dev);
359static int i596_start_xmit(struct sk_buff *skb, struct net_device *dev);
7d12e780 360static irqreturn_t i596_interrupt(int irq, void *dev_id);
1da177e4 361static int i596_close(struct net_device *dev);
1da177e4
LT		 362static void i596_add_cmd(struct net_device *dev, struct i596_cmd *cmd);
363static void i596_tx_timeout (struct net_device *dev);
364static void print_eth(unsigned char *buf, char *str);
365static void set_multicast_list(struct net_device *dev);
366
367static int rx_ring_size = RX_RING_SIZE;
368static int ticks_limit = 25;
369static int max_cmd_backlog = TX_RING_SIZE-1;
370
371
372static 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
394static 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
415static 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
429static 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
443static inline int wait_cfg(struct net_device *dev, struct i596_cmd *cmd, int delcnt, char *str)
444{
445 volatile struct i596_cmd *c = cmd;
6aa20a22 446
1da177e4
LT		 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
6aa20a22 457
1da177e4
LT		 458static void i596_display_data(struct net_device *dev)
459{
460 struct i596_private *lp = dev->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)
7d12e780 503static irqreturn_t i596_error(int irq, void *dev_id)
1da177e4
LT		 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
528static inline void init_rx_bufs(struct net_device *dev)
529{
530 struct i596_private *lp = dev->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;
689be439
DM		 547 rbd->v_data = skb->data;
548 rbd->b_data = WSWAPchar(virt_to_bus(skb->data));
1da177e4
LT		 549 rbd->size = PKT_BUF_SZ;
550#ifdef __mc68000__
689be439 551 cache_clear(virt_to_phys(skb->data), PKT_BUF_SZ);
1da177e4
LT		 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
579static inline void remove_rx_bufs(struct net_device *dev)
580{
581 struct i596_private *lp = dev->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
593static void rebuild_rx_bufs(struct net_device *dev)
594{
595 struct i596_private *lp = dev->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
612static int init_i596_mem(struct net_device *dev)
613{
614 struct i596_private *lp = dev->priv;
0018dfa4 615#if !defined(ENABLE_MVME16x_NET) && !defined(ENABLE_BVME6000_NET) || defined(ENABLE_APRICOT)
1da177e4
LT		 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
759failed:
760 printk(KERN_CRIT "%s: Failed to initialise 82596\n", dev->name);
761 MPU_PORT(dev, PORT_RESET, NULL);
762 return -1;
763}
764
765static inline int i596_rx(struct net_device *dev)
766{
767 struct i596_private *lp = dev->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));
6aa20a22 789
1da177e4
LT		 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;
689be439
DM		 817 rbd->v_data = newskb->data;
818 rbd->b_data = WSWAPchar(virt_to_bus(newskb->data));
1da177e4 819#ifdef __mc68000__
689be439 820 cache_clear(virt_to_phys(newskb->data), PKT_BUF_SZ);
1da177e4
LT		 821#endif
822 }
823 else
824 skb = dev_alloc_skb(pkt_len + 2);
825memory_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);
09f75cd7 829 dev->stats.rx_dropped++;
1da177e4
LT		 830 }
831 else {
1da177e4
LT		 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__
689be439 840 cache_clear(virt_to_phys(rbd->skb->data),
1da177e4
LT		 841 pkt_len);
842#endif
843 netif_rx(skb);
844 dev->last_rx = jiffies;
09f75cd7
JG		 845 dev->stats.rx_packets++;
846 dev->stats.rx_bytes+=pkt_len;
1da177e4
LT		 847 }
848 }
849 else {
850 DEB(DEB_ERRORS, printk(KERN_DEBUG "%s: Error, rfd.stat = 0x%04x\n",
851 dev->name, rfd->stat));
09f75cd7 852 dev->stats.rx_errors++;
1da177e4 853 if ((rfd->stat) & 0x0001)
09f75cd7 854 dev->stats.collisions++;
1da177e4 855 if ((rfd->stat) & 0x0080)
09f75cd7 856 dev->stats.rx_length_errors++;
1da177e4 857 if ((rfd->stat) & 0x0100)
09f75cd7 858 dev->stats.rx_over_errors++;
1da177e4 859 if ((rfd->stat) & 0x0200)
09f75cd7 860 dev->stats.rx_fifo_errors++;
1da177e4 861 if ((rfd->stat) & 0x0400)
09f75cd7 862 dev->stats.rx_frame_errors++;
1da177e4 863 if ((rfd->stat) & 0x0800)
09f75cd7 864 dev->stats.rx_crc_errors++;
1da177e4 865 if ((rfd->stat) & 0x1000)
09f75cd7 866 dev->stats.rx_length_errors++;
1da177e4
LT		 867 }
868
869 /* Clear the buffer descriptor count and EOF + F flags */
870
871 if (rbd != I596_NULL && (rbd->count & 0x4000)) {
872 rbd->count = 0;
873 lp->rbd_head = rbd->v_next;
874 }
875
876 /* Tidy the frame descriptor, marking it as end of list */
877
878 rfd->rbd = I596_NULL;
879 rfd->stat = 0;
880 rfd->cmd = CMD_EOL|CMD_FLEX;
881 rfd->count = 0;
882
883 /* Remove end-of-list from old end descriptor */
884
885 rfd->v_prev->cmd = CMD_FLEX;
886
887 /* Update record of next frame descriptor to process */
888
889 lp->scb.rfd = rfd->b_next;
890 lp->rfd_head = rfd->v_next;
891 rfd = lp->rfd_head;
892 }
893
894 DEB(DEB_RXFRAME,printk(KERN_DEBUG "frames %d\n", frames));
895
896 return 0;
897}
898
899
864fe05d 900static void i596_cleanup_cmd(struct net_device *dev, struct i596_private *lp)
1da177e4
LT		 901{
902 struct i596_cmd *ptr;
903
904 while (lp->cmd_head != I596_NULL) {
905 ptr = lp->cmd_head;
906 lp->cmd_head = ptr->v_next;
907 lp->cmd_backlog--;
908
909 switch ((ptr->command) & 0x7) {
910 case CmdTx:
911 {
912 struct tx_cmd *tx_cmd = (struct tx_cmd *) ptr;
913 struct sk_buff *skb = tx_cmd->skb;
914
915 dev_kfree_skb(skb);
916
09f75cd7
JG		 917 dev->stats.tx_errors++;
918 dev->stats.tx_aborted_errors++;
1da177e4
LT		 919
920 ptr->v_next = ptr->b_next = I596_NULL;
921 tx_cmd->cmd.command = 0; /* Mark as free */
922 break;
923 }
924 default:
925 ptr->v_next = ptr->b_next = I596_NULL;
926 }
927 }
928
929 wait_cmd(dev,lp,100,"i596_cleanup_cmd timed out");
930 lp->scb.cmd = I596_NULL;
931}
932
864fe05d
AM		 933static void i596_reset(struct net_device *dev, struct i596_private *lp,
934 int ioaddr)
1da177e4
LT		 935{
936 unsigned long flags;
937
938 DEB(DEB_RESET,printk(KERN_DEBUG "i596_reset\n"));
939
940 spin_lock_irqsave (&lp->lock, flags);
941
942 wait_cmd(dev,lp,100,"i596_reset timed out");
943
944 netif_stop_queue(dev);
945
946 lp->scb.command = CUC_ABORT | RX_ABORT;
947 CA(dev);
948
949 /* wait for shutdown */
950 wait_cmd(dev,lp,1000,"i596_reset 2 timed out");
951 spin_unlock_irqrestore (&lp->lock, flags);
952
953 i596_cleanup_cmd(dev,lp);
954 i596_rx(dev);
955
956 netif_start_queue(dev);
957 init_i596_mem(dev);
958}
959
960static void i596_add_cmd(struct net_device *dev, struct i596_cmd *cmd)
961{
962 struct i596_private *lp = dev->priv;
963 int ioaddr = dev->base_addr;
964 unsigned long flags;
965
966 DEB(DEB_ADDCMD,printk(KERN_DEBUG "i596_add_cmd\n"));
967
968 cmd->status = 0;
969 cmd->command |= (CMD_EOL | CMD_INTR);
970 cmd->v_next = cmd->b_next = I596_NULL;
971
972 spin_lock_irqsave (&lp->lock, flags);
973
974 if (lp->cmd_head != I596_NULL) {
975 lp->cmd_tail->v_next = cmd;
976 lp->cmd_tail->b_next = WSWAPcmd(virt_to_bus(&cmd->status));
977 } else {
978 lp->cmd_head = cmd;
979 wait_cmd(dev,lp,100,"i596_add_cmd timed out");
980 lp->scb.cmd = WSWAPcmd(virt_to_bus(&cmd->status));
981 lp->scb.command = CUC_START;
982 CA(dev);
983 }
984 lp->cmd_tail = cmd;
985 lp->cmd_backlog++;
986
987 spin_unlock_irqrestore (&lp->lock, flags);
988
989 if (lp->cmd_backlog > max_cmd_backlog) {
990 unsigned long tickssofar = jiffies - lp->last_cmd;
991
992 if (tickssofar < ticks_limit)
993 return;
994
995 printk(KERN_NOTICE "%s: command unit timed out, status resetting.\n", dev->name);
996
997 i596_reset(dev, lp, ioaddr);
998 }
999}
1000
1001static int i596_open(struct net_device *dev)
1002{
1003 int res = 0;
1004
1005 DEB(DEB_OPEN,printk(KERN_DEBUG "%s: i596_open() irq %d.\n", dev->name, dev->irq));
1006
1007 if (request_irq(dev->irq, i596_interrupt, 0, "i82596", dev)) {
1008 printk(KERN_ERR "%s: IRQ %d not free\n", dev->name, dev->irq);
1009 return -EAGAIN;
1010 }
1011#ifdef ENABLE_MVME16x_NET
1012 if (MACH_IS_MVME16x) {
1013 if (request_irq(0x56, i596_error, 0, "i82596_error", dev))
1014 return -EAGAIN;
1015 }
1016#endif
1017 init_rx_bufs(dev);
1018
1019 netif_start_queue(dev);
1020
1021 /* Initialize the 82596 memory */
1022 if (init_i596_mem(dev)) {
1023 res = -EAGAIN;
1024 free_irq(dev->irq, dev);
1025 }
1026
1027 return res;
1028}
1029
1030static void i596_tx_timeout (struct net_device *dev)
1031{
1032 struct i596_private *lp = dev->priv;
1033 int ioaddr = dev->base_addr;
1034
1035 /* Transmitter timeout, serious problems. */
1036 DEB(DEB_ERRORS,printk(KERN_ERR "%s: transmit timed out, status resetting.\n",
1037 dev->name));
1038
09f75cd7 1039 dev->stats.tx_errors++;
1da177e4
LT		 1040
1041 /* Try to restart the adaptor */
09f75cd7 1042 if (lp->last_restart == dev->stats.tx_packets) {
1da177e4
LT		 1043 DEB(DEB_ERRORS,printk(KERN_ERR "Resetting board.\n"));
1044 /* Shutdown and restart */
1045 i596_reset (dev, lp, ioaddr);
1046 } else {
1047 /* Issue a channel attention signal */
1048 DEB(DEB_ERRORS,printk(KERN_ERR "Kicking board.\n"));
1049 lp->scb.command = CUC_START | RX_START;
1050 CA (dev);
09f75cd7 1051 lp->last_restart = dev->stats.tx_packets;
1da177e4
LT		 1052 }
1053
1054 dev->trans_start = jiffies;
1055 netif_wake_queue (dev);
1056}
1057
1058
1059static int i596_start_xmit(struct sk_buff *skb, struct net_device *dev)
1060{
1061 struct i596_private *lp = dev->priv;
1062 struct tx_cmd *tx_cmd;
1063 struct i596_tbd *tbd;
1064 short length = skb->len;
1065 dev->trans_start = jiffies;
1066
9e8e83d1
AM		 1067 DEB(DEB_STARTTX,printk(KERN_DEBUG "%s: i596_start_xmit(%x,%p) called\n",
1068 dev->name, skb->len, skb->data));
1da177e4
LT		 1069
1070 if (skb->len < ETH_ZLEN) {
5b057c6b 1071 if (skb_padto(skb, ETH_ZLEN))
1da177e4
LT		 1072 return 0;
1073 length = ETH_ZLEN;
1074 }
1075 netif_stop_queue(dev);
1076
1077 tx_cmd = lp->tx_cmds + lp->next_tx_cmd;
1078 tbd = lp->tbds + lp->next_tx_cmd;
1079
1080 if (tx_cmd->cmd.command) {
1081 printk(KERN_NOTICE "%s: xmit ring full, dropping packet.\n",
1082 dev->name);
09f75cd7 1083 dev->stats.tx_dropped++;
1da177e4
LT		 1084
1085 dev_kfree_skb(skb);
1086 } else {
1087 if (++lp->next_tx_cmd == TX_RING_SIZE)
1088 lp->next_tx_cmd = 0;
1089 tx_cmd->tbd = WSWAPtbd(virt_to_bus(tbd));
1090 tbd->next = I596_NULL;
1091
1092 tx_cmd->cmd.command = CMD_FLEX | CmdTx;
1093 tx_cmd->skb = skb;
1094
1095 tx_cmd->pad = 0;
1096 tx_cmd->size = 0;
1097 tbd->pad = 0;
1098 tbd->size = EOF | length;
1099
1100 tbd->data = WSWAPchar(virt_to_bus(skb->data));
1101
1102#ifdef __mc68000__
1103 cache_push(virt_to_phys(skb->data), length);
1104#endif
1105 DEB(DEB_TXADDR,print_eth(skb->data, "tx-queued"));
1106 i596_add_cmd(dev, &tx_cmd->cmd);
1107
09f75cd7
JG		 1108 dev->stats.tx_packets++;
1109 dev->stats.tx_bytes += length;
1da177e4
LT		 1110 }
1111
1112 netif_start_queue(dev);
1113
1114 return 0;
1115}
1116
1117static void print_eth(unsigned char *add, char *str)
1118{
0795af57
JP		 1119 DECLARE_MAC_BUF(mac);
1120 DECLARE_MAC_BUF(mac2);
1da177e4 1121
0795af57
JP		 1122 printk(KERN_DEBUG "i596 0x%p, %s --> %s %02X%02X, %s\n",
1123 add, print_mac(mac, add + 6), print_mac(mac2, add),
1124 add[12], add[13], str);
1da177e4
LT		 1125}
1126
1127static int io = 0x300;
1128static int irq = 10;
1129
1130struct net_device * __init i82596_probe(int unit)
1131{
1132 struct net_device *dev;
1133 int i;
1134 struct i596_private *lp;
1135 char eth_addr[8];
1136 static int probed;
1137 int err;
1138
1139 if (probed)
1140 return ERR_PTR(-ENODEV);
1141 probed++;
1142
1143 dev = alloc_etherdev(0);
1144 if (!dev)
1145 return ERR_PTR(-ENOMEM);
1146
1147 if (unit >= 0) {
1148 sprintf(dev->name, "eth%d", unit);
1149 netdev_boot_setup_check(dev);
1150 } else {
1151 dev->base_addr = io;
1152 dev->irq = irq;
1153 }
1154
1155#ifdef ENABLE_MVME16x_NET
1156 if (MACH_IS_MVME16x) {
1157 if (mvme16x_config & MVME16x_CONFIG_NO_ETHERNET) {
1158 printk(KERN_NOTICE "Ethernet probe disabled - chip not present\n");
1159 err = -ENODEV;
1160 goto out;
1161 }
1162 memcpy(eth_addr, (void *) 0xfffc1f2c, 6); /* YUCK! Get addr from NOVRAM */
1163 dev->base_addr = MVME_I596_BASE;
1164 dev->irq = (unsigned) MVME16x_IRQ_I596;
1165 }
1166#endif
1167#ifdef ENABLE_BVME6000_NET
1168 if (MACH_IS_BVME6000) {
1169 volatile unsigned char *rtc = (unsigned char *) BVME_RTC_BASE;
1170 unsigned char msr = rtc[3];
1171 int i;
1172
1173 rtc[3] |= 0x80;
1174 for (i = 0; i < 6; i++)
1175 eth_addr[i] = rtc[i * 4 + 7]; /* Stored in RTC RAM at offset 1 */
1176 rtc[3] = msr;
1177 dev->base_addr = BVME_I596_BASE;
1178 dev->irq = (unsigned) BVME_IRQ_I596;
1179 }
1180#endif
1181#ifdef ENABLE_APRICOT
1182 {
1183 int checksum = 0;
1184 int ioaddr = 0x300;
1185
1186 /* this is easy the ethernet interface can only be at 0x300 */
1187 /* first check nothing is already registered here */
1188
1189 if (!request_region(ioaddr, I596_TOTAL_SIZE, DRV_NAME)) {
1190 printk(KERN_ERR "82596: IO address 0x%04x in use\n", ioaddr);
1191 err = -EBUSY;
1192 goto out;
1193 }
1194
1195 for (i = 0; i < 8; i++) {
1196 eth_addr[i] = inb(ioaddr + 8 + i);
1197 checksum += eth_addr[i];
1198 }
1199
1200 /* checksum is a multiple of 0x100, got this wrong first time
1201 some machines have 0x100, some 0x200. The DOS driver doesn't
1202 even bother with the checksum.
1203 Some other boards trip the checksum.. but then appear as
1204 ether address 0. Trap these - AC */
1205
6aa20a22 1206 if ((checksum % 0x100) ||
1da177e4
LT		 1207 (memcmp(eth_addr, "\x00\x00\x49", 3) != 0)) {
1208 err = -ENODEV;
1209 goto out1;
1210 }
1211
1212 dev->base_addr = ioaddr;
1213 dev->irq = 10;
1214 }
1215#endif
1216 dev->mem_start = (int)__get_free_pages(GFP_ATOMIC, 0);
1217 if (!dev->mem_start) {
1218 err = -ENOMEM;
1219 goto out1;
1220 }
1221
1222 DEB(DEB_PROBE,printk(KERN_INFO "%s: 82596 at %#3lx,", dev->name, dev->base_addr));
1223
1224 for (i = 0; i < 6; i++)
1225 DEB(DEB_PROBE,printk(" %2.2X", dev->dev_addr[i] = eth_addr[i]));
1226
1227 DEB(DEB_PROBE,printk(" IRQ %d.\n", dev->irq));
1228
1229 DEB(DEB_PROBE,printk(KERN_INFO "%s", version));
1230
1231 /* The 82596-specific entries in the device structure. */
1da177e4
LT		 1232 dev->open = i596_open;
1233 dev->stop = i596_close;
1234 dev->hard_start_xmit = i596_start_xmit;
1da177e4
LT		 1235 dev->set_multicast_list = set_multicast_list;
1236 dev->tx_timeout = i596_tx_timeout;
1237 dev->watchdog_timeo = TX_TIMEOUT;
1238
1239 dev->priv = (void *)(dev->mem_start);
1240
1241 lp = dev->priv;
9e8e83d1
AM		 1242 DEB(DEB_INIT,printk(KERN_DEBUG "%s: lp at 0x%08lx (%zd bytes), "
1243 "lp->scb at 0x%08lx\n",
1da177e4
LT		 1244 dev->name, (unsigned long)lp,
1245 sizeof(struct i596_private), (unsigned long)&lp->scb));
1246 memset((void *) lp, 0, sizeof(struct i596_private));
1247
1248#ifdef __mc68000__
1249 cache_push(virt_to_phys((void *)(dev->mem_start)), 4096);
1250 cache_clear(virt_to_phys((void *)(dev->mem_start)), 4096);
1251 kernel_set_cachemode((void *)(dev->mem_start), 4096, IOMAP_NOCACHE_SER);
1252#endif
1253 lp->scb.command = 0;
1254 lp->scb.cmd = I596_NULL;
1255 lp->scb.rfd = I596_NULL;
1256 spin_lock_init(&lp->lock);
1257
1258 err = register_netdev(dev);
1259 if (err)
1260 goto out2;
1261 return dev;
1262out2:
1263#ifdef __mc68000__
1264 /* XXX This assumes default cache mode to be IOMAP_FULL_CACHING,
1265 * XXX which may be invalid (CONFIG_060_WRITETHROUGH)
1266 */
1267 kernel_set_cachemode((void *)(dev->mem_start), 4096,
1268 IOMAP_FULL_CACHING);
1269#endif
1270 free_page ((u32)(dev->mem_start));
1271out1:
1272#ifdef ENABLE_APRICOT
1273 release_region(dev->base_addr, I596_TOTAL_SIZE);
1274#endif
1275out:
1276 free_netdev(dev);
1277 return ERR_PTR(err);
1278}
1279
7d12e780 1280static irqreturn_t i596_interrupt(int irq, void *dev_id)
1da177e4
LT		 1281{
1282 struct net_device *dev = dev_id;
1283 struct i596_private *lp;
1284 short ioaddr;
1285 unsigned short status, ack_cmd = 0;
1286 int handled = 0;
1287
1288#ifdef ENABLE_BVME6000_NET
1289 if (MACH_IS_BVME6000) {
1290 if (*(char *) BVME_LOCAL_IRQ_STAT & BVME_ETHERR) {
7d12e780 1291 i596_error(irq, dev_id);
1da177e4
LT		 1292 return IRQ_HANDLED;
1293 }
1294 }
1295#endif
1296 if (dev == NULL) {
1297 printk(KERN_ERR "i596_interrupt(): irq %d for unknown device.\n", irq);
1298 return IRQ_NONE;
1299 }
1300
1301 ioaddr = dev->base_addr;
1302 lp = dev->priv;
1303
1304 spin_lock (&lp->lock);
1305
1306 wait_cmd(dev,lp,100,"i596 interrupt, timeout");
1307 status = lp->scb.status;
1308
1309 DEB(DEB_INTS,printk(KERN_DEBUG "%s: i596 interrupt, IRQ %d, status %4.4x.\n",
1310 dev->name, irq, status));
1311
1312 ack_cmd = status & 0xf000;
1313
1314 if ((status & 0x8000) || (status & 0x2000)) {
1315 struct i596_cmd *ptr;
1316
1317 handled = 1;
1318 if ((status & 0x8000))
1319 DEB(DEB_INTS,printk(KERN_DEBUG "%s: i596 interrupt completed command.\n", dev->name));
1320 if ((status & 0x2000))
1321 DEB(DEB_INTS,printk(KERN_DEBUG "%s: i596 interrupt command unit inactive %x.\n", dev->name, status & 0x0700));
1322
1323 while ((lp->cmd_head != I596_NULL) && (lp->cmd_head->status & STAT_C)) {
1324 ptr = lp->cmd_head;
1325
1326 DEB(DEB_STATUS,printk(KERN_DEBUG "cmd_head->status = %04x, ->command = %04x\n",
1327 lp->cmd_head->status, lp->cmd_head->command));
1328 lp->cmd_head = ptr->v_next;
1329 lp->cmd_backlog--;
1330
1331 switch ((ptr->command) & 0x7) {
1332 case CmdTx:
1333 {
1334 struct tx_cmd *tx_cmd = (struct tx_cmd *) ptr;
1335 struct sk_buff *skb = tx_cmd->skb;
1336
1337 if ((ptr->status) & STAT_OK) {
1338 DEB(DEB_TXADDR,print_eth(skb->data, "tx-done"));
1339 } else {
09f75cd7 1340 dev->stats.tx_errors++;
1da177e4 1341 if ((ptr->status) & 0x0020)
09f75cd7 1342 dev->stats.collisions++;
1da177e4 1343 if (!((ptr->status) & 0x0040))
09f75cd7 1344 dev->stats.tx_heartbeat_errors++;
1da177e4 1345 if ((ptr->status) & 0x0400)
09f75cd7 1346 dev->stats.tx_carrier_errors++;
1da177e4 1347 if ((ptr->status) & 0x0800)
09f75cd7 1348 dev->stats.collisions++;
1da177e4 1349 if ((ptr->status) & 0x1000)
09f75cd7 1350 dev->stats.tx_aborted_errors++;
1da177e4
LT		 1351 }
1352
1353 dev_kfree_skb_irq(skb);
1354
1355 tx_cmd->cmd.command = 0; /* Mark free */
1356 break;
1357 }
1358 case CmdTDR:
1359 {
1360 unsigned short status = ((struct tdr_cmd *)ptr)->status;
1361
1362 if (status & 0x8000) {
1363 DEB(DEB_TDR,printk(KERN_INFO "%s: link ok.\n", dev->name));
1364 } else {
1365 if (status & 0x4000)
1366 printk(KERN_ERR "%s: Transceiver problem.\n", dev->name);
1367 if (status & 0x2000)
1368 printk(KERN_ERR "%s: Termination problem.\n", dev->name);
1369 if (status & 0x1000)
1370 printk(KERN_ERR "%s: Short circuit.\n", dev->name);
1371
1372 DEB(DEB_TDR,printk(KERN_INFO "%s: Time %d.\n", dev->name, status & 0x07ff));
1373 }
1374 break;
1375 }
1376 case CmdConfigure:
1377 case CmdMulticastList:
1378 /* Zap command so set_multicast_list() knows it is free */
1379 ptr->command = 0;
1380 break;
1381 }
1382 ptr->v_next = ptr->b_next = I596_NULL;
1383 lp->last_cmd = jiffies;
1384 }
1385
1386 ptr = lp->cmd_head;
1387 while ((ptr != I596_NULL) && (ptr != lp->cmd_tail)) {
1388 ptr->command &= 0x1fff;
1389 ptr = ptr->v_next;
1390 }
1391
1392 if ((lp->cmd_head != I596_NULL))
1393 ack_cmd |= CUC_START;
1394 lp->scb.cmd = WSWAPcmd(virt_to_bus(&lp->cmd_head->status));
1395 }
1396 if ((status & 0x1000) || (status & 0x4000)) {
1397 if ((status & 0x4000))
1398 DEB(DEB_INTS,printk(KERN_DEBUG "%s: i596 interrupt received a frame.\n", dev->name));
1399 i596_rx(dev);
1400 /* Only RX_START if stopped - RGH 07-07-96 */
1401 if (status & 0x1000) {
1402 if (netif_running(dev)) {
1403 DEB(DEB_ERRORS,printk(KERN_ERR "%s: i596 interrupt receive unit inactive, status 0x%x\n", dev->name, status));
1404 ack_cmd |= RX_START;
09f75cd7
JG		 1405 dev->stats.rx_errors++;
1406 dev->stats.rx_fifo_errors++;
1da177e4
LT		 1407 rebuild_rx_bufs(dev);
1408 }
1409 }
1410 }
1411 wait_cmd(dev,lp,100,"i596 interrupt, timeout");
1412 lp->scb.command = ack_cmd;
1413
1414#ifdef ENABLE_MVME16x_NET
1415 if (MACH_IS_MVME16x) {
1416 /* Ack the interrupt */
1417
1418 volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000;
1419
1420 pcc2[0x2a] |= 0x08;
1421 }
1422#endif
1423#ifdef ENABLE_BVME6000_NET
1424 if (MACH_IS_BVME6000) {
1425 volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG;
1426
1427 *ethirq = 1;
1428 *ethirq = 3;
1429 }
1430#endif
1431#ifdef ENABLE_APRICOT
1432 (void) inb(ioaddr + 0x10);
1433 outb(4, ioaddr + 0xf);
1434#endif
1435 CA(dev);
1436
1437 DEB(DEB_INTS,printk(KERN_DEBUG "%s: exiting interrupt.\n", dev->name));
1438
1439 spin_unlock (&lp->lock);
1440 return IRQ_RETVAL(handled);
1441}
1442
1443static int i596_close(struct net_device *dev)
1444{
1445 struct i596_private *lp = dev->priv;
1446 unsigned long flags;
1447
1448 netif_stop_queue(dev);
1449
1450 DEB(DEB_INIT,printk(KERN_DEBUG "%s: Shutting down ethercard, status was %4.4x.\n",
1451 dev->name, lp->scb.status));
1452
1453 spin_lock_irqsave(&lp->lock, flags);
1454
1455 wait_cmd(dev,lp,100,"close1 timed out");
1456 lp->scb.command = CUC_ABORT | RX_ABORT;
1457 CA(dev);
1458
1459 wait_cmd(dev,lp,100,"close2 timed out");
1460
1461 spin_unlock_irqrestore(&lp->lock, flags);
1462 DEB(DEB_STRUCT,i596_display_data(dev));
1463 i596_cleanup_cmd(dev,lp);
1464
1465#ifdef ENABLE_MVME16x_NET
1466 if (MACH_IS_MVME16x) {
1467 volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000;
1468
1469 /* Disable all ints */
1470 pcc2[0x28] = 1;
1471 pcc2[0x2a] = 0x40;
1472 pcc2[0x2b] = 0x40; /* Set snooping bits now! */
1473 }
1474#endif
1475#ifdef ENABLE_BVME6000_NET
1476 if (MACH_IS_BVME6000) {
1477 volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG;
1478
1479 *ethirq = 1;
1480 }
1481#endif
1482
1483 free_irq(dev->irq, dev);
1484 remove_rx_bufs(dev);
1485
1486 return 0;
1487}
1488
1da177e4
LT		 1489/*
1490 * Set or clear the multicast filter for this adaptor.
1491 */
1492
1493static void set_multicast_list(struct net_device *dev)
1494{
1495 struct i596_private *lp = dev->priv;
1496 int config = 0, cnt;
1497
1498 DEB(DEB_MULTI,printk(KERN_DEBUG "%s: set multicast list, %d entries, promisc %s, allmulti %s\n",
1499 dev->name, dev->mc_count,
1500 dev->flags & IFF_PROMISC ? "ON" : "OFF",
1501 dev->flags & IFF_ALLMULTI ? "ON" : "OFF"));
1502
1503 if (wait_cfg(dev, &lp->cf_cmd.cmd, 1000, "config change request timed out"))
1504 return;
1505
1506 if ((dev->flags & IFF_PROMISC) && !(lp->cf_cmd.i596_config[8] & 0x01)) {
1507 lp->cf_cmd.i596_config[8] |= 0x01;
1508 config = 1;
1509 }
1510 if (!(dev->flags & IFF_PROMISC) && (lp->cf_cmd.i596_config[8] & 0x01)) {
1511 lp->cf_cmd.i596_config[8] &= ~0x01;
1512 config = 1;
1513 }
1514 if ((dev->flags & IFF_ALLMULTI) && (lp->cf_cmd.i596_config[11] & 0x20)) {
1515 lp->cf_cmd.i596_config[11] &= ~0x20;
1516 config = 1;
1517 }
1518 if (!(dev->flags & IFF_ALLMULTI) && !(lp->cf_cmd.i596_config[11] & 0x20)) {
1519 lp->cf_cmd.i596_config[11] |= 0x20;
1520 config = 1;
1521 }
1522 if (config) {
1523 lp->cf_cmd.cmd.command = CmdConfigure;
1524 i596_add_cmd(dev, &lp->cf_cmd.cmd);
1525 }
1526
1527 cnt = dev->mc_count;
1528 if (cnt > MAX_MC_CNT)
1529 {
1530 cnt = MAX_MC_CNT;
1531 printk(KERN_ERR "%s: Only %d multicast addresses supported",
1532 dev->name, cnt);
1533 }
6aa20a22 1534
1da177e4
LT		 1535 if (dev->mc_count > 0) {
1536 struct dev_mc_list *dmi;
1537 unsigned char *cp;
1538 struct mc_cmd *cmd;
0795af57 1539 DECLARE_MAC_BUF(mac);
1da177e4
LT		 1540
1541 if (wait_cfg(dev, &lp->mc_cmd.cmd, 1000, "multicast list change request timed out"))
1542 return;
1543 cmd = &lp->mc_cmd;
1544 cmd->cmd.command = CmdMulticastList;
1545 cmd->mc_cnt = dev->mc_count * 6;
1546 cp = cmd->mc_addrs;
1547 for (dmi = dev->mc_list; cnt && dmi != NULL; dmi = dmi->next, cnt--, cp += 6) {
1548 memcpy(cp, dmi->dmi_addr, 6);
1549 if (i596_debug > 1)
0795af57
JP		 1550 DEB(DEB_MULTI,printk(KERN_INFO "%s: Adding address %s\n",
1551 dev->name, print_mac(mac, cp)));
1da177e4
LT		 1552 }
1553 i596_add_cmd(dev, &cmd->cmd);
1554 }
1555}
1556
1557#ifdef MODULE
1558static struct net_device *dev_82596;
1559
1560#ifdef ENABLE_APRICOT
1561module_param(irq, int, 0);
1562MODULE_PARM_DESC(irq, "Apricot IRQ number");
1563#endif
1564
1565static int debug = -1;
1566module_param(debug, int, 0);
1567MODULE_PARM_DESC(debug, "i82596 debug mask");
1568
864fe05d 1569int __init init_module(void)
1da177e4
LT		 1570{
1571 if (debug >= 0)
1572 i596_debug = debug;
1573 dev_82596 = i82596_probe(-1);
1574 if (IS_ERR(dev_82596))
1575 return PTR_ERR(dev_82596);
1576 return 0;
1577}
1578
864fe05d 1579void __exit cleanup_module(void)
1da177e4
LT		 1580{
1581 unregister_netdev(dev_82596);
1582#ifdef __mc68000__
1583 /* XXX This assumes default cache mode to be IOMAP_FULL_CACHING,
1584 * XXX which may be invalid (CONFIG_060_WRITETHROUGH)
1585 */
1586
1587 kernel_set_cachemode((void *)(dev_82596->mem_start), 4096,
1588 IOMAP_FULL_CACHING);
1589#endif
1590 free_page ((u32)(dev_82596->mem_start));
1591#ifdef ENABLE_APRICOT
1592 /* If we don't do this, we can't re-insmod it later. */
1593 release_region(dev_82596->base_addr, I596_TOTAL_SIZE);
1594#endif
1595 free_netdev(dev_82596);
1596}
1597
1598#endif /* MODULE */
6aa20a22 1599
1da177e4
LT		 1600/*
1601 * Local variables:
1602 * compile-command: "gcc -D__KERNEL__ -I/usr/src/linux/net/inet -Wall -Wstrict-prototypes -O6 -m486 -c 82596.c"
1603 * End:
1604 */
Linux kernel - Deliverables
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