ia64/linux-2.6.18-xen.hg

view drivers/net/82596.c @ 897:329ea0ccb344

balloon: try harder to balloon up under memory pressure.

Currently if the balloon driver is unable to increase the guest's
reservation it assumes the failure was due to reaching its full
allocation, gives up on the ballooning operation and records the limit
it reached as the "hard limit". The driver will not try again until
the target is set again (even to the same value).

However it is possible that ballooning has in fact failed due to
memory pressure in the host and therefore it is desirable to keep
attempting to reach the target in case memory becomes available. The
most likely scenario is that some guests are ballooning down while
others are ballooning up and therefore there is temporary memory
pressure while things stabilise. You would not expect a well behaved
toolstack to ask a domain to balloon to more than its allocation nor
would you expect it to deliberately over-commit memory by setting
balloon targets which exceed the total host memory.

This patch drops the concept of a hard limit and causes the balloon
driver to retry increasing the reservation on a timer in the same
manner as when decreasing the reservation.

Also if we partially succeed in increasing the reservation
(i.e. receive less pages than we asked for) then we may as well keep
those pages rather than returning them to Xen.

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
author Keir Fraser <keir.fraser@citrix.com>
date Fri Jun 05 14:01:20 2009 +0100 (2009-06-05)
parents 831230e53067
children
line source
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
7 Modularised 12/94 Mark Evans
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
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.
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
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.
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.
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
41 */
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>
57 #include <asm/io.h>
58 #include <asm/dma.h>
59 #include <asm/pgtable.h>
61 static char version[] __initdata =
62 "82596.c $Revision: 1.5 $\n";
64 #define DRV_NAME "82596"
66 /* DEBUG flags
67 */
69 #define DEB_INIT 0x0001
70 #define DEB_PROBE 0x0002
71 #define DEB_SERIOUS 0x0004
72 #define DEB_ERRORS 0x0008
73 #define DEB_MULTI 0x0010
74 #define DEB_TDR 0x0020
75 #define DEB_OPEN 0x0040
76 #define DEB_RESET 0x0080
77 #define DEB_ADDCMD 0x0100
78 #define DEB_STATUS 0x0200
79 #define DEB_STARTTX 0x0400
80 #define DEB_RXADDR 0x0800
81 #define DEB_TXADDR 0x1000
82 #define DEB_RXFRAME 0x2000
83 #define DEB_INTS 0x4000
84 #define DEB_STRUCT 0x8000
85 #define DEB_ANY 0xffff
88 #define DEB(x,y) if (i596_debug & (x)) y
91 #if defined(CONFIG_MVME16x_NET) || defined(CONFIG_MVME16x_NET_MODULE)
92 #define ENABLE_MVME16x_NET
93 #endif
94 #if defined(CONFIG_BVME6000_NET) || defined(CONFIG_BVME6000_NET_MODULE)
95 #define ENABLE_BVME6000_NET
96 #endif
97 #if defined(CONFIG_APRICOT) || defined(CONFIG_APRICOT_MODULE)
98 #define ENABLE_APRICOT
99 #endif
101 #ifdef ENABLE_MVME16x_NET
102 #include <asm/mvme16xhw.h>
103 #endif
104 #ifdef ENABLE_BVME6000_NET
105 #include <asm/bvme6000hw.h>
106 #endif
108 /*
109 * Define various macros for Channel Attention, word swapping etc., dependent
110 * on architecture. MVME and BVME are 680x0 based, otherwise it is Intel.
111 */
113 #ifdef __mc68000__
114 #define WSWAPrfd(x) ((struct i596_rfd *) (((u32)(x)<<16) | ((((u32)(x)))>>16)))
115 #define WSWAPrbd(x) ((struct i596_rbd *) (((u32)(x)<<16) | ((((u32)(x)))>>16)))
116 #define WSWAPiscp(x) ((struct i596_iscp *)(((u32)(x)<<16) | ((((u32)(x)))>>16)))
117 #define WSWAPscb(x) ((struct i596_scb *) (((u32)(x)<<16) | ((((u32)(x)))>>16)))
118 #define WSWAPcmd(x) ((struct i596_cmd *) (((u32)(x)<<16) | ((((u32)(x)))>>16)))
119 #define WSWAPtbd(x) ((struct i596_tbd *) (((u32)(x)<<16) | ((((u32)(x)))>>16)))
120 #define WSWAPchar(x) ((char *) (((u32)(x)<<16) | ((((u32)(x)))>>16)))
121 #define ISCP_BUSY 0x00010000
122 #define MACH_IS_APRICOT 0
123 #else
124 #define WSWAPrfd(x) ((struct i596_rfd *)(x))
125 #define WSWAPrbd(x) ((struct i596_rbd *)(x))
126 #define WSWAPiscp(x) ((struct i596_iscp *)(x))
127 #define WSWAPscb(x) ((struct i596_scb *)(x))
128 #define WSWAPcmd(x) ((struct i596_cmd *)(x))
129 #define WSWAPtbd(x) ((struct i596_tbd *)(x))
130 #define WSWAPchar(x) ((char *)(x))
131 #define ISCP_BUSY 0x0001
132 #define MACH_IS_APRICOT 1
133 #endif
135 /*
136 * The MPU_PORT command allows direct access to the 82596. With PORT access
137 * the following commands are available (p5-18). The 32-bit port command
138 * must be word-swapped with the most significant word written first.
139 * This only applies to VME boards.
140 */
141 #define PORT_RESET 0x00 /* reset 82596 */
142 #define PORT_SELFTEST 0x01 /* selftest */
143 #define PORT_ALTSCP 0x02 /* alternate SCB address */
144 #define PORT_ALTDUMP 0x03 /* Alternate DUMP address */
146 static int i596_debug = (DEB_SERIOUS|DEB_PROBE);
148 MODULE_AUTHOR("Richard Hirst");
149 MODULE_DESCRIPTION("i82596 driver");
150 MODULE_LICENSE("GPL");
152 module_param(i596_debug, int, 0);
153 MODULE_PARM_DESC(i596_debug, "i82596 debug mask");
156 /* Copy frames shorter than rx_copybreak, otherwise pass on up in
157 * a full sized sk_buff. Value of 100 stolen from tulip.c (!alpha).
158 */
159 static int rx_copybreak = 100;
161 #define PKT_BUF_SZ 1536
162 #define MAX_MC_CNT 64
164 #define I596_TOTAL_SIZE 17
166 #define I596_NULL ((void *)0xffffffff)
168 #define CMD_EOL 0x8000 /* The last command of the list, stop. */
169 #define CMD_SUSP 0x4000 /* Suspend after doing cmd. */
170 #define CMD_INTR 0x2000 /* Interrupt after doing cmd. */
172 #define CMD_FLEX 0x0008 /* Enable flexible memory model */
174 enum commands {
175 CmdNOp = 0, CmdSASetup = 1, CmdConfigure = 2, CmdMulticastList = 3,
176 CmdTx = 4, CmdTDR = 5, CmdDump = 6, CmdDiagnose = 7
177 };
179 #define STAT_C 0x8000 /* Set to 0 after execution */
180 #define STAT_B 0x4000 /* Command being executed */
181 #define STAT_OK 0x2000 /* Command executed ok */
182 #define STAT_A 0x1000 /* Command aborted */
184 #define CUC_START 0x0100
185 #define CUC_RESUME 0x0200
186 #define CUC_SUSPEND 0x0300
187 #define CUC_ABORT 0x0400
188 #define RX_START 0x0010
189 #define RX_RESUME 0x0020
190 #define RX_SUSPEND 0x0030
191 #define RX_ABORT 0x0040
193 #define TX_TIMEOUT 5
196 struct i596_reg {
197 unsigned short porthi;
198 unsigned short portlo;
199 unsigned long ca;
200 };
202 #define EOF 0x8000
203 #define SIZE_MASK 0x3fff
205 struct i596_tbd {
206 unsigned short size;
207 unsigned short pad;
208 struct i596_tbd *next;
209 char *data;
210 };
212 /* The command structure has two 'next' pointers; v_next is the address of
213 * the next command as seen by the CPU, b_next is the address of the next
214 * command as seen by the 82596. The b_next pointer, as used by the 82596
215 * always references the status field of the next command, rather than the
216 * v_next field, because the 82596 is unaware of v_next. It may seem more
217 * logical to put v_next at the end of the structure, but we cannot do that
218 * because the 82596 expects other fields to be there, depending on command
219 * type.
220 */
222 struct i596_cmd {
223 struct i596_cmd *v_next; /* Address from CPUs viewpoint */
224 unsigned short status;
225 unsigned short command;
226 struct i596_cmd *b_next; /* Address from i596 viewpoint */
227 };
229 struct tx_cmd {
230 struct i596_cmd cmd;
231 struct i596_tbd *tbd;
232 unsigned short size;
233 unsigned short pad;
234 struct sk_buff *skb; /* So we can free it after tx */
235 };
237 struct tdr_cmd {
238 struct i596_cmd cmd;
239 unsigned short status;
240 unsigned short pad;
241 };
243 struct mc_cmd {
244 struct i596_cmd cmd;
245 short mc_cnt;
246 char mc_addrs[MAX_MC_CNT*6];
247 };
249 struct sa_cmd {
250 struct i596_cmd cmd;
251 char eth_addr[8];
252 };
254 struct cf_cmd {
255 struct i596_cmd cmd;
256 char i596_config[16];
257 };
259 struct i596_rfd {
260 unsigned short stat;
261 unsigned short cmd;
262 struct i596_rfd *b_next; /* Address from i596 viewpoint */
263 struct i596_rbd *rbd;
264 unsigned short count;
265 unsigned short size;
266 struct i596_rfd *v_next; /* Address from CPUs viewpoint */
267 struct i596_rfd *v_prev;
268 };
270 struct i596_rbd {
271 unsigned short count;
272 unsigned short zero1;
273 struct i596_rbd *b_next;
274 unsigned char *b_data; /* Address from i596 viewpoint */
275 unsigned short size;
276 unsigned short zero2;
277 struct sk_buff *skb;
278 struct i596_rbd *v_next;
279 struct i596_rbd *b_addr; /* This rbd addr from i596 view */
280 unsigned char *v_data; /* Address from CPUs viewpoint */
281 };
283 #define TX_RING_SIZE 64
284 #define RX_RING_SIZE 16
286 struct i596_scb {
287 unsigned short status;
288 unsigned short command;
289 struct i596_cmd *cmd;
290 struct i596_rfd *rfd;
291 unsigned long crc_err;
292 unsigned long align_err;
293 unsigned long resource_err;
294 unsigned long over_err;
295 unsigned long rcvdt_err;
296 unsigned long short_err;
297 unsigned short t_on;
298 unsigned short t_off;
299 };
301 struct i596_iscp {
302 unsigned long stat;
303 struct i596_scb *scb;
304 };
306 struct i596_scp {
307 unsigned long sysbus;
308 unsigned long pad;
309 struct i596_iscp *iscp;
310 };
312 struct i596_private {
313 volatile struct i596_scp scp;
314 volatile struct i596_iscp iscp;
315 volatile struct i596_scb scb;
316 struct sa_cmd sa_cmd;
317 struct cf_cmd cf_cmd;
318 struct tdr_cmd tdr_cmd;
319 struct mc_cmd mc_cmd;
320 unsigned long stat;
321 int last_restart __attribute__((aligned(4)));
322 struct i596_rfd *rfd_head;
323 struct i596_rbd *rbd_head;
324 struct i596_cmd *cmd_tail;
325 struct i596_cmd *cmd_head;
326 int cmd_backlog;
327 unsigned long last_cmd;
328 struct net_device_stats stats;
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 };
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 */ };
358 static int i596_open(struct net_device *dev);
359 static int i596_start_xmit(struct sk_buff *skb, struct net_device *dev);
360 static irqreturn_t i596_interrupt(int irq, void *dev_id, struct pt_regs *regs);
361 static int i596_close(struct net_device *dev);
362 static struct net_device_stats *i596_get_stats(struct net_device *dev);
363 static void i596_add_cmd(struct net_device *dev, struct i596_cmd *cmd);
364 static void i596_tx_timeout (struct net_device *dev);
365 static void print_eth(unsigned char *buf, char *str);
366 static void set_multicast_list(struct net_device *dev);
368 static int rx_ring_size = RX_RING_SIZE;
369 static int ticks_limit = 25;
370 static int max_cmd_backlog = TX_RING_SIZE-1;
373 static inline void CA(struct net_device *dev)
374 {
375 #ifdef ENABLE_MVME16x_NET
376 if (MACH_IS_MVME16x) {
377 ((struct i596_reg *) dev->base_addr)->ca = 1;
378 }
379 #endif
380 #ifdef ENABLE_BVME6000_NET
381 if (MACH_IS_BVME6000) {
382 volatile u32 i;
384 i = *(volatile u32 *) (dev->base_addr);
385 }
386 #endif
387 #ifdef ENABLE_APRICOT
388 if (MACH_IS_APRICOT) {
389 outw(0, (short) (dev->base_addr) + 4);
390 }
391 #endif
392 }
395 static inline void MPU_PORT(struct net_device *dev, int c, volatile void *x)
396 {
397 #ifdef ENABLE_MVME16x_NET
398 if (MACH_IS_MVME16x) {
399 struct i596_reg *p = (struct i596_reg *) (dev->base_addr);
400 p->porthi = ((c) | (u32) (x)) & 0xffff;
401 p->portlo = ((c) | (u32) (x)) >> 16;
402 }
403 #endif
404 #ifdef ENABLE_BVME6000_NET
405 if (MACH_IS_BVME6000) {
406 u32 v = (u32) (c) | (u32) (x);
407 v = ((u32) (v) << 16) | ((u32) (v) >> 16);
408 *(volatile u32 *) dev->base_addr = v;
409 udelay(1);
410 *(volatile u32 *) dev->base_addr = v;
411 }
412 #endif
413 }
416 static inline int wait_istat(struct net_device *dev, struct i596_private *lp, int delcnt, char *str)
417 {
418 while (--delcnt && lp->iscp.stat)
419 udelay(10);
420 if (!delcnt) {
421 printk(KERN_ERR "%s: %s, status %4.4x, cmd %4.4x.\n",
422 dev->name, str, lp->scb.status, lp->scb.command);
423 return -1;
424 }
425 else
426 return 0;
427 }
430 static inline int wait_cmd(struct net_device *dev, struct i596_private *lp, int delcnt, char *str)
431 {
432 while (--delcnt && lp->scb.command)
433 udelay(10);
434 if (!delcnt) {
435 printk(KERN_ERR "%s: %s, status %4.4x, cmd %4.4x.\n",
436 dev->name, str, lp->scb.status, lp->scb.command);
437 return -1;
438 }
439 else
440 return 0;
441 }
444 static inline int wait_cfg(struct net_device *dev, struct i596_cmd *cmd, int delcnt, char *str)
445 {
446 volatile struct i596_cmd *c = cmd;
448 while (--delcnt && c->command)
449 udelay(10);
450 if (!delcnt) {
451 printk(KERN_ERR "%s: %s.\n", dev->name, str);
452 return -1;
453 }
454 else
455 return 0;
456 }
459 static void i596_display_data(struct net_device *dev)
460 {
461 struct i596_private *lp = dev->priv;
462 struct i596_cmd *cmd;
463 struct i596_rfd *rfd;
464 struct i596_rbd *rbd;
466 printk(KERN_ERR "lp and scp at %p, .sysbus = %08lx, .iscp = %p\n",
467 &lp->scp, lp->scp.sysbus, lp->scp.iscp);
468 printk(KERN_ERR "iscp at %p, iscp.stat = %08lx, .scb = %p\n",
469 &lp->iscp, lp->iscp.stat, lp->iscp.scb);
470 printk(KERN_ERR "scb at %p, scb.status = %04x, .command = %04x,"
471 " .cmd = %p, .rfd = %p\n",
472 &lp->scb, lp->scb.status, lp->scb.command,
473 lp->scb.cmd, lp->scb.rfd);
474 printk(KERN_ERR " errors: crc %lx, align %lx, resource %lx,"
475 " over %lx, rcvdt %lx, short %lx\n",
476 lp->scb.crc_err, lp->scb.align_err, lp->scb.resource_err,
477 lp->scb.over_err, lp->scb.rcvdt_err, lp->scb.short_err);
478 cmd = lp->cmd_head;
479 while (cmd != I596_NULL) {
480 printk(KERN_ERR "cmd at %p, .status = %04x, .command = %04x, .b_next = %p\n",
481 cmd, cmd->status, cmd->command, cmd->b_next);
482 cmd = cmd->v_next;
483 }
484 rfd = lp->rfd_head;
485 printk(KERN_ERR "rfd_head = %p\n", rfd);
486 do {
487 printk(KERN_ERR " %p .stat %04x, .cmd %04x, b_next %p, rbd %p,"
488 " count %04x\n",
489 rfd, rfd->stat, rfd->cmd, rfd->b_next, rfd->rbd,
490 rfd->count);
491 rfd = rfd->v_next;
492 } while (rfd != lp->rfd_head);
493 rbd = lp->rbd_head;
494 printk(KERN_ERR "rbd_head = %p\n", rbd);
495 do {
496 printk(KERN_ERR " %p .count %04x, b_next %p, b_data %p, size %04x\n",
497 rbd, rbd->count, rbd->b_next, rbd->b_data, rbd->size);
498 rbd = rbd->v_next;
499 } while (rbd != lp->rbd_head);
500 }
503 #if defined(ENABLE_MVME16x_NET) || defined(ENABLE_BVME6000_NET)
504 static irqreturn_t i596_error(int irq, void *dev_id, struct pt_regs *regs)
505 {
506 struct net_device *dev = dev_id;
507 #ifdef ENABLE_MVME16x_NET
508 if (MACH_IS_MVME16x) {
509 volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000;
511 pcc2[0x28] = 1;
512 pcc2[0x2b] = 0x1d;
513 }
514 #endif
515 #ifdef ENABLE_BVME6000_NET
516 if (MACH_IS_BVME6000) {
517 volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG;
519 *ethirq = 1;
520 *ethirq = 3;
521 }
522 #endif
523 printk(KERN_ERR "%s: Error interrupt\n", dev->name);
524 i596_display_data(dev);
525 return IRQ_HANDLED;
526 }
527 #endif
529 static inline void init_rx_bufs(struct net_device *dev)
530 {
531 struct i596_private *lp = dev->priv;
532 int i;
533 struct i596_rfd *rfd;
534 struct i596_rbd *rbd;
536 /* First build the Receive Buffer Descriptor List */
538 for (i = 0, rbd = lp->rbds; i < rx_ring_size; i++, rbd++) {
539 struct sk_buff *skb = dev_alloc_skb(PKT_BUF_SZ);
541 if (skb == NULL)
542 panic("82596: alloc_skb() failed");
543 skb->dev = dev;
544 rbd->v_next = rbd+1;
545 rbd->b_next = WSWAPrbd(virt_to_bus(rbd+1));
546 rbd->b_addr = WSWAPrbd(virt_to_bus(rbd));
547 rbd->skb = skb;
548 rbd->v_data = skb->data;
549 rbd->b_data = WSWAPchar(virt_to_bus(skb->data));
550 rbd->size = PKT_BUF_SZ;
551 #ifdef __mc68000__
552 cache_clear(virt_to_phys(skb->data), PKT_BUF_SZ);
553 #endif
554 }
555 lp->rbd_head = lp->rbds;
556 rbd = lp->rbds + rx_ring_size - 1;
557 rbd->v_next = lp->rbds;
558 rbd->b_next = WSWAPrbd(virt_to_bus(lp->rbds));
560 /* Now build the Receive Frame Descriptor List */
562 for (i = 0, rfd = lp->rfds; i < rx_ring_size; i++, rfd++) {
563 rfd->rbd = I596_NULL;
564 rfd->v_next = rfd+1;
565 rfd->v_prev = rfd-1;
566 rfd->b_next = WSWAPrfd(virt_to_bus(rfd+1));
567 rfd->cmd = CMD_FLEX;
568 }
569 lp->rfd_head = lp->rfds;
570 lp->scb.rfd = WSWAPrfd(virt_to_bus(lp->rfds));
571 rfd = lp->rfds;
572 rfd->rbd = lp->rbd_head;
573 rfd->v_prev = lp->rfds + rx_ring_size - 1;
574 rfd = lp->rfds + rx_ring_size - 1;
575 rfd->v_next = lp->rfds;
576 rfd->b_next = WSWAPrfd(virt_to_bus(lp->rfds));
577 rfd->cmd = CMD_EOL|CMD_FLEX;
578 }
580 static inline void remove_rx_bufs(struct net_device *dev)
581 {
582 struct i596_private *lp = dev->priv;
583 struct i596_rbd *rbd;
584 int i;
586 for (i = 0, rbd = lp->rbds; i < rx_ring_size; i++, rbd++) {
587 if (rbd->skb == NULL)
588 break;
589 dev_kfree_skb(rbd->skb);
590 }
591 }
594 static void rebuild_rx_bufs(struct net_device *dev)
595 {
596 struct i596_private *lp = dev->priv;
597 int i;
599 /* Ensure rx frame/buffer descriptors are tidy */
601 for (i = 0; i < rx_ring_size; i++) {
602 lp->rfds[i].rbd = I596_NULL;
603 lp->rfds[i].cmd = CMD_FLEX;
604 }
605 lp->rfds[rx_ring_size-1].cmd = CMD_EOL|CMD_FLEX;
606 lp->rfd_head = lp->rfds;
607 lp->scb.rfd = WSWAPrfd(virt_to_bus(lp->rfds));
608 lp->rbd_head = lp->rbds;
609 lp->rfds[0].rbd = WSWAPrbd(virt_to_bus(lp->rbds));
610 }
613 static int init_i596_mem(struct net_device *dev)
614 {
615 struct i596_private *lp = dev->priv;
616 #if !defined(ENABLE_MVME16x_NET) && !defined(ENABLE_BVME6000_NET) || defined(ENABLE_APRICOT)
617 short ioaddr = dev->base_addr;
618 #endif
619 unsigned long flags;
621 MPU_PORT(dev, PORT_RESET, NULL);
623 udelay(100); /* Wait 100us - seems to help */
625 #if defined(ENABLE_MVME16x_NET) || defined(ENABLE_BVME6000_NET)
626 #ifdef ENABLE_MVME16x_NET
627 if (MACH_IS_MVME16x) {
628 volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000;
630 /* Disable all ints for now */
631 pcc2[0x28] = 1;
632 pcc2[0x2a] = 0x48;
633 /* Following disables snooping. Snooping is not required
634 * as we make appropriate use of non-cached pages for
635 * shared data, and cache_push/cache_clear.
636 */
637 pcc2[0x2b] = 0x08;
638 }
639 #endif
640 #ifdef ENABLE_BVME6000_NET
641 if (MACH_IS_BVME6000) {
642 volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG;
644 *ethirq = 1;
645 }
646 #endif
648 /* change the scp address */
650 MPU_PORT(dev, PORT_ALTSCP, (void *)virt_to_bus((void *)&lp->scp));
652 #elif defined(ENABLE_APRICOT)
654 {
655 u32 scp = virt_to_bus(&lp->scp);
657 /* change the scp address */
658 outw(0, ioaddr);
659 outw(0, ioaddr);
660 outb(4, ioaddr + 0xf);
661 outw(scp | 2, ioaddr);
662 outw(scp >> 16, ioaddr);
663 }
664 #endif
666 lp->last_cmd = jiffies;
668 #ifdef ENABLE_MVME16x_NET
669 if (MACH_IS_MVME16x)
670 lp->scp.sysbus = 0x00000054;
671 #endif
672 #ifdef ENABLE_BVME6000_NET
673 if (MACH_IS_BVME6000)
674 lp->scp.sysbus = 0x0000004c;
675 #endif
676 #ifdef ENABLE_APRICOT
677 if (MACH_IS_APRICOT)
678 lp->scp.sysbus = 0x00440000;
679 #endif
681 lp->scp.iscp = WSWAPiscp(virt_to_bus((void *)&lp->iscp));
682 lp->iscp.scb = WSWAPscb(virt_to_bus((void *)&lp->scb));
683 lp->iscp.stat = ISCP_BUSY;
684 lp->cmd_backlog = 0;
686 lp->cmd_head = lp->scb.cmd = I596_NULL;
688 #ifdef ENABLE_BVME6000_NET
689 if (MACH_IS_BVME6000) {
690 lp->scb.t_on = 7 * 25;
691 lp->scb.t_off = 1 * 25;
692 }
693 #endif
695 DEB(DEB_INIT,printk(KERN_DEBUG "%s: starting i82596.\n", dev->name));
697 #if defined(ENABLE_APRICOT)
698 (void) inb(ioaddr + 0x10);
699 outb(4, ioaddr + 0xf);
700 #endif
701 CA(dev);
703 if (wait_istat(dev,lp,1000,"initialization timed out"))
704 goto failed;
705 DEB(DEB_INIT,printk(KERN_DEBUG "%s: i82596 initialization successful\n", dev->name));
707 /* Ensure rx frame/buffer descriptors are tidy */
708 rebuild_rx_bufs(dev);
709 lp->scb.command = 0;
711 #ifdef ENABLE_MVME16x_NET
712 if (MACH_IS_MVME16x) {
713 volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000;
715 /* Enable ints, etc. now */
716 pcc2[0x2a] = 0x55; /* Edge sensitive */
717 pcc2[0x2b] = 0x15;
718 }
719 #endif
720 #ifdef ENABLE_BVME6000_NET
721 if (MACH_IS_BVME6000) {
722 volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG;
724 *ethirq = 3;
725 }
726 #endif
729 DEB(DEB_INIT,printk(KERN_DEBUG "%s: queuing CmdConfigure\n", dev->name));
730 memcpy(lp->cf_cmd.i596_config, init_setup, 14);
731 lp->cf_cmd.cmd.command = CmdConfigure;
732 i596_add_cmd(dev, &lp->cf_cmd.cmd);
734 DEB(DEB_INIT,printk(KERN_DEBUG "%s: queuing CmdSASetup\n", dev->name));
735 memcpy(lp->sa_cmd.eth_addr, dev->dev_addr, 6);
736 lp->sa_cmd.cmd.command = CmdSASetup;
737 i596_add_cmd(dev, &lp->sa_cmd.cmd);
739 DEB(DEB_INIT,printk(KERN_DEBUG "%s: queuing CmdTDR\n", dev->name));
740 lp->tdr_cmd.cmd.command = CmdTDR;
741 i596_add_cmd(dev, &lp->tdr_cmd.cmd);
743 spin_lock_irqsave (&lp->lock, flags);
745 if (wait_cmd(dev,lp,1000,"timed out waiting to issue RX_START")) {
746 spin_unlock_irqrestore (&lp->lock, flags);
747 goto failed;
748 }
749 DEB(DEB_INIT,printk(KERN_DEBUG "%s: Issuing RX_START\n", dev->name));
750 lp->scb.command = RX_START;
751 CA(dev);
753 spin_unlock_irqrestore (&lp->lock, flags);
755 if (wait_cmd(dev,lp,1000,"RX_START not processed"))
756 goto failed;
757 DEB(DEB_INIT,printk(KERN_DEBUG "%s: Receive unit started OK\n", dev->name));
758 return 0;
760 failed:
761 printk(KERN_CRIT "%s: Failed to initialise 82596\n", dev->name);
762 MPU_PORT(dev, PORT_RESET, NULL);
763 return -1;
764 }
766 static inline int i596_rx(struct net_device *dev)
767 {
768 struct i596_private *lp = dev->priv;
769 struct i596_rfd *rfd;
770 struct i596_rbd *rbd;
771 int frames = 0;
773 DEB(DEB_RXFRAME,printk(KERN_DEBUG "i596_rx(), rfd_head %p, rbd_head %p\n",
774 lp->rfd_head, lp->rbd_head));
776 rfd = lp->rfd_head; /* Ref next frame to check */
778 while ((rfd->stat) & STAT_C) { /* Loop while complete frames */
779 if (rfd->rbd == I596_NULL)
780 rbd = I596_NULL;
781 else if (rfd->rbd == lp->rbd_head->b_addr)
782 rbd = lp->rbd_head;
783 else {
784 printk(KERN_CRIT "%s: rbd chain broken!\n", dev->name);
785 /* XXX Now what? */
786 rbd = I596_NULL;
787 }
788 DEB(DEB_RXFRAME, printk(KERN_DEBUG " rfd %p, rfd.rbd %p, rfd.stat %04x\n",
789 rfd, rfd->rbd, rfd->stat));
791 if (rbd != I596_NULL && ((rfd->stat) & STAT_OK)) {
792 /* a good frame */
793 int pkt_len = rbd->count & 0x3fff;
794 struct sk_buff *skb = rbd->skb;
795 int rx_in_place = 0;
797 DEB(DEB_RXADDR,print_eth(rbd->v_data, "received"));
798 frames++;
800 /* Check if the packet is long enough to just accept
801 * without copying to a properly sized skbuff.
802 */
804 if (pkt_len > rx_copybreak) {
805 struct sk_buff *newskb;
807 /* Get fresh skbuff to replace filled one. */
808 newskb = dev_alloc_skb(PKT_BUF_SZ);
809 if (newskb == NULL) {
810 skb = NULL; /* drop pkt */
811 goto memory_squeeze;
812 }
813 /* Pass up the skb already on the Rx ring. */
814 skb_put(skb, pkt_len);
815 rx_in_place = 1;
816 rbd->skb = newskb;
817 newskb->dev = dev;
818 rbd->v_data = newskb->data;
819 rbd->b_data = WSWAPchar(virt_to_bus(newskb->data));
820 #ifdef __mc68000__
821 cache_clear(virt_to_phys(newskb->data), PKT_BUF_SZ);
822 #endif
823 }
824 else
825 skb = dev_alloc_skb(pkt_len + 2);
826 memory_squeeze:
827 if (skb == NULL) {
828 /* XXX tulip.c can defer packets here!! */
829 printk(KERN_WARNING "%s: i596_rx Memory squeeze, dropping packet.\n", dev->name);
830 lp->stats.rx_dropped++;
831 }
832 else {
833 skb->dev = dev;
834 if (!rx_in_place) {
835 /* 16 byte align the data fields */
836 skb_reserve(skb, 2);
837 memcpy(skb_put(skb,pkt_len), rbd->v_data, pkt_len);
838 }
839 skb->protocol=eth_type_trans(skb,dev);
840 skb->len = pkt_len;
841 #ifdef __mc68000__
842 cache_clear(virt_to_phys(rbd->skb->data),
843 pkt_len);
844 #endif
845 netif_rx(skb);
846 dev->last_rx = jiffies;
847 lp->stats.rx_packets++;
848 lp->stats.rx_bytes+=pkt_len;
849 }
850 }
851 else {
852 DEB(DEB_ERRORS, printk(KERN_DEBUG "%s: Error, rfd.stat = 0x%04x\n",
853 dev->name, rfd->stat));
854 lp->stats.rx_errors++;
855 if ((rfd->stat) & 0x0001)
856 lp->stats.collisions++;
857 if ((rfd->stat) & 0x0080)
858 lp->stats.rx_length_errors++;
859 if ((rfd->stat) & 0x0100)
860 lp->stats.rx_over_errors++;
861 if ((rfd->stat) & 0x0200)
862 lp->stats.rx_fifo_errors++;
863 if ((rfd->stat) & 0x0400)
864 lp->stats.rx_frame_errors++;
865 if ((rfd->stat) & 0x0800)
866 lp->stats.rx_crc_errors++;
867 if ((rfd->stat) & 0x1000)
868 lp->stats.rx_length_errors++;
869 }
871 /* Clear the buffer descriptor count and EOF + F flags */
873 if (rbd != I596_NULL && (rbd->count & 0x4000)) {
874 rbd->count = 0;
875 lp->rbd_head = rbd->v_next;
876 }
878 /* Tidy the frame descriptor, marking it as end of list */
880 rfd->rbd = I596_NULL;
881 rfd->stat = 0;
882 rfd->cmd = CMD_EOL|CMD_FLEX;
883 rfd->count = 0;
885 /* Remove end-of-list from old end descriptor */
887 rfd->v_prev->cmd = CMD_FLEX;
889 /* Update record of next frame descriptor to process */
891 lp->scb.rfd = rfd->b_next;
892 lp->rfd_head = rfd->v_next;
893 rfd = lp->rfd_head;
894 }
896 DEB(DEB_RXFRAME,printk(KERN_DEBUG "frames %d\n", frames));
898 return 0;
899 }
902 static void i596_cleanup_cmd(struct net_device *dev, struct i596_private *lp)
903 {
904 struct i596_cmd *ptr;
906 while (lp->cmd_head != I596_NULL) {
907 ptr = lp->cmd_head;
908 lp->cmd_head = ptr->v_next;
909 lp->cmd_backlog--;
911 switch ((ptr->command) & 0x7) {
912 case CmdTx:
913 {
914 struct tx_cmd *tx_cmd = (struct tx_cmd *) ptr;
915 struct sk_buff *skb = tx_cmd->skb;
917 dev_kfree_skb(skb);
919 lp->stats.tx_errors++;
920 lp->stats.tx_aborted_errors++;
922 ptr->v_next = ptr->b_next = I596_NULL;
923 tx_cmd->cmd.command = 0; /* Mark as free */
924 break;
925 }
926 default:
927 ptr->v_next = ptr->b_next = I596_NULL;
928 }
929 }
931 wait_cmd(dev,lp,100,"i596_cleanup_cmd timed out");
932 lp->scb.cmd = I596_NULL;
933 }
935 static void i596_reset(struct net_device *dev, struct i596_private *lp,
936 int ioaddr)
937 {
938 unsigned long flags;
940 DEB(DEB_RESET,printk(KERN_DEBUG "i596_reset\n"));
942 spin_lock_irqsave (&lp->lock, flags);
944 wait_cmd(dev,lp,100,"i596_reset timed out");
946 netif_stop_queue(dev);
948 lp->scb.command = CUC_ABORT | RX_ABORT;
949 CA(dev);
951 /* wait for shutdown */
952 wait_cmd(dev,lp,1000,"i596_reset 2 timed out");
953 spin_unlock_irqrestore (&lp->lock, flags);
955 i596_cleanup_cmd(dev,lp);
956 i596_rx(dev);
958 netif_start_queue(dev);
959 init_i596_mem(dev);
960 }
962 static void i596_add_cmd(struct net_device *dev, struct i596_cmd *cmd)
963 {
964 struct i596_private *lp = dev->priv;
965 int ioaddr = dev->base_addr;
966 unsigned long flags;
968 DEB(DEB_ADDCMD,printk(KERN_DEBUG "i596_add_cmd\n"));
970 cmd->status = 0;
971 cmd->command |= (CMD_EOL | CMD_INTR);
972 cmd->v_next = cmd->b_next = I596_NULL;
974 spin_lock_irqsave (&lp->lock, flags);
976 if (lp->cmd_head != I596_NULL) {
977 lp->cmd_tail->v_next = cmd;
978 lp->cmd_tail->b_next = WSWAPcmd(virt_to_bus(&cmd->status));
979 } else {
980 lp->cmd_head = cmd;
981 wait_cmd(dev,lp,100,"i596_add_cmd timed out");
982 lp->scb.cmd = WSWAPcmd(virt_to_bus(&cmd->status));
983 lp->scb.command = CUC_START;
984 CA(dev);
985 }
986 lp->cmd_tail = cmd;
987 lp->cmd_backlog++;
989 spin_unlock_irqrestore (&lp->lock, flags);
991 if (lp->cmd_backlog > max_cmd_backlog) {
992 unsigned long tickssofar = jiffies - lp->last_cmd;
994 if (tickssofar < ticks_limit)
995 return;
997 printk(KERN_NOTICE "%s: command unit timed out, status resetting.\n", dev->name);
999 i596_reset(dev, lp, ioaddr);
1003 static int i596_open(struct net_device *dev)
1005 int res = 0;
1007 DEB(DEB_OPEN,printk(KERN_DEBUG "%s: i596_open() irq %d.\n", dev->name, dev->irq));
1009 if (request_irq(dev->irq, i596_interrupt, 0, "i82596", dev)) {
1010 printk(KERN_ERR "%s: IRQ %d not free\n", dev->name, dev->irq);
1011 return -EAGAIN;
1013 #ifdef ENABLE_MVME16x_NET
1014 if (MACH_IS_MVME16x) {
1015 if (request_irq(0x56, i596_error, 0, "i82596_error", dev))
1016 return -EAGAIN;
1018 #endif
1019 init_rx_bufs(dev);
1021 netif_start_queue(dev);
1023 /* Initialize the 82596 memory */
1024 if (init_i596_mem(dev)) {
1025 res = -EAGAIN;
1026 free_irq(dev->irq, dev);
1029 return res;
1032 static void i596_tx_timeout (struct net_device *dev)
1034 struct i596_private *lp = dev->priv;
1035 int ioaddr = dev->base_addr;
1037 /* Transmitter timeout, serious problems. */
1038 DEB(DEB_ERRORS,printk(KERN_ERR "%s: transmit timed out, status resetting.\n",
1039 dev->name));
1041 lp->stats.tx_errors++;
1043 /* Try to restart the adaptor */
1044 if (lp->last_restart == lp->stats.tx_packets) {
1045 DEB(DEB_ERRORS,printk(KERN_ERR "Resetting board.\n"));
1046 /* Shutdown and restart */
1047 i596_reset (dev, lp, ioaddr);
1048 } else {
1049 /* Issue a channel attention signal */
1050 DEB(DEB_ERRORS,printk(KERN_ERR "Kicking board.\n"));
1051 lp->scb.command = CUC_START | RX_START;
1052 CA (dev);
1053 lp->last_restart = lp->stats.tx_packets;
1056 dev->trans_start = jiffies;
1057 netif_wake_queue (dev);
1061 static int i596_start_xmit(struct sk_buff *skb, struct net_device *dev)
1063 struct i596_private *lp = dev->priv;
1064 struct tx_cmd *tx_cmd;
1065 struct i596_tbd *tbd;
1066 short length = skb->len;
1067 dev->trans_start = jiffies;
1069 DEB(DEB_STARTTX,printk(KERN_DEBUG "%s: i596_start_xmit(%x,%x) called\n", dev->name,
1070 skb->len, (unsigned int)skb->data));
1072 if (skb->len < ETH_ZLEN) {
1073 if (skb_padto(skb, ETH_ZLEN))
1074 return 0;
1075 length = ETH_ZLEN;
1077 netif_stop_queue(dev);
1079 tx_cmd = lp->tx_cmds + lp->next_tx_cmd;
1080 tbd = lp->tbds + lp->next_tx_cmd;
1082 if (tx_cmd->cmd.command) {
1083 printk(KERN_NOTICE "%s: xmit ring full, dropping packet.\n",
1084 dev->name);
1085 lp->stats.tx_dropped++;
1087 dev_kfree_skb(skb);
1088 } else {
1089 if (++lp->next_tx_cmd == TX_RING_SIZE)
1090 lp->next_tx_cmd = 0;
1091 tx_cmd->tbd = WSWAPtbd(virt_to_bus(tbd));
1092 tbd->next = I596_NULL;
1094 tx_cmd->cmd.command = CMD_FLEX | CmdTx;
1095 tx_cmd->skb = skb;
1097 tx_cmd->pad = 0;
1098 tx_cmd->size = 0;
1099 tbd->pad = 0;
1100 tbd->size = EOF | length;
1102 tbd->data = WSWAPchar(virt_to_bus(skb->data));
1104 #ifdef __mc68000__
1105 cache_push(virt_to_phys(skb->data), length);
1106 #endif
1107 DEB(DEB_TXADDR,print_eth(skb->data, "tx-queued"));
1108 i596_add_cmd(dev, &tx_cmd->cmd);
1110 lp->stats.tx_packets++;
1111 lp->stats.tx_bytes += length;
1114 netif_start_queue(dev);
1116 return 0;
1119 static void print_eth(unsigned char *add, char *str)
1121 int i;
1123 printk(KERN_DEBUG "i596 0x%p, ", add);
1124 for (i = 0; i < 6; i++)
1125 printk(" %02X", add[i + 6]);
1126 printk(" -->");
1127 for (i = 0; i < 6; i++)
1128 printk(" %02X", add[i]);
1129 printk(" %02X%02X, %s\n", add[12], add[13], str);
1132 static int io = 0x300;
1133 static int irq = 10;
1135 struct net_device * __init i82596_probe(int unit)
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;
1144 if (probed)
1145 return ERR_PTR(-ENODEV);
1146 probed++;
1148 dev = alloc_etherdev(0);
1149 if (!dev)
1150 return ERR_PTR(-ENOMEM);
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;
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;
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;
1171 #endif
1172 #ifdef ENABLE_BVME6000_NET
1173 if (MACH_IS_BVME6000) {
1174 volatile unsigned char *rtc = (unsigned char *) BVME_RTC_BASE;
1175 unsigned char msr = rtc[3];
1176 int i;
1178 rtc[3] |= 0x80;
1179 for (i = 0; i < 6; i++)
1180 eth_addr[i] = rtc[i * 4 + 7]; /* Stored in RTC RAM at offset 1 */
1181 rtc[3] = msr;
1182 dev->base_addr = BVME_I596_BASE;
1183 dev->irq = (unsigned) BVME_IRQ_I596;
1185 #endif
1186 #ifdef ENABLE_APRICOT
1188 int checksum = 0;
1189 int ioaddr = 0x300;
1191 /* this is easy the ethernet interface can only be at 0x300 */
1192 /* first check nothing is already registered here */
1194 if (!request_region(ioaddr, I596_TOTAL_SIZE, DRV_NAME)) {
1195 printk(KERN_ERR "82596: IO address 0x%04x in use\n", ioaddr);
1196 err = -EBUSY;
1197 goto out;
1200 for (i = 0; i < 8; i++) {
1201 eth_addr[i] = inb(ioaddr + 8 + i);
1202 checksum += eth_addr[i];
1205 /* checksum is a multiple of 0x100, got this wrong first time
1206 some machines have 0x100, some 0x200. The DOS driver doesn't
1207 even bother with the checksum.
1208 Some other boards trip the checksum.. but then appear as
1209 ether address 0. Trap these - AC */
1211 if ((checksum % 0x100) ||
1212 (memcmp(eth_addr, "\x00\x00\x49", 3) != 0)) {
1213 err = -ENODEV;
1214 goto out1;
1217 dev->base_addr = ioaddr;
1218 dev->irq = 10;
1220 #endif
1221 dev->mem_start = (int)__get_free_pages(GFP_ATOMIC, 0);
1222 if (!dev->mem_start) {
1223 err = -ENOMEM;
1224 goto out1;
1227 DEB(DEB_PROBE,printk(KERN_INFO "%s: 82596 at %#3lx,", dev->name, dev->base_addr));
1229 for (i = 0; i < 6; i++)
1230 DEB(DEB_PROBE,printk(" %2.2X", dev->dev_addr[i] = eth_addr[i]));
1232 DEB(DEB_PROBE,printk(" IRQ %d.\n", dev->irq));
1234 DEB(DEB_PROBE,printk(KERN_INFO "%s", version));
1236 /* The 82596-specific entries in the device structure. */
1237 SET_MODULE_OWNER(dev);
1238 dev->open = i596_open;
1239 dev->stop = i596_close;
1240 dev->hard_start_xmit = i596_start_xmit;
1241 dev->get_stats = i596_get_stats;
1242 dev->set_multicast_list = set_multicast_list;
1243 dev->tx_timeout = i596_tx_timeout;
1244 dev->watchdog_timeo = TX_TIMEOUT;
1246 dev->priv = (void *)(dev->mem_start);
1248 lp = dev->priv;
1249 DEB(DEB_INIT,printk(KERN_DEBUG "%s: lp at 0x%08lx (%d bytes), lp->scb at 0x%08lx\n",
1250 dev->name, (unsigned long)lp,
1251 sizeof(struct i596_private), (unsigned long)&lp->scb));
1252 memset((void *) lp, 0, sizeof(struct i596_private));
1254 #ifdef __mc68000__
1255 cache_push(virt_to_phys((void *)(dev->mem_start)), 4096);
1256 cache_clear(virt_to_phys((void *)(dev->mem_start)), 4096);
1257 kernel_set_cachemode((void *)(dev->mem_start), 4096, IOMAP_NOCACHE_SER);
1258 #endif
1259 lp->scb.command = 0;
1260 lp->scb.cmd = I596_NULL;
1261 lp->scb.rfd = I596_NULL;
1262 spin_lock_init(&lp->lock);
1264 err = register_netdev(dev);
1265 if (err)
1266 goto out2;
1267 return dev;
1268 out2:
1269 #ifdef __mc68000__
1270 /* XXX This assumes default cache mode to be IOMAP_FULL_CACHING,
1271 * XXX which may be invalid (CONFIG_060_WRITETHROUGH)
1272 */
1273 kernel_set_cachemode((void *)(dev->mem_start), 4096,
1274 IOMAP_FULL_CACHING);
1275 #endif
1276 free_page ((u32)(dev->mem_start));
1277 out1:
1278 #ifdef ENABLE_APRICOT
1279 release_region(dev->base_addr, I596_TOTAL_SIZE);
1280 #endif
1281 out:
1282 free_netdev(dev);
1283 return ERR_PTR(err);
1286 static irqreturn_t i596_interrupt(int irq, void *dev_id, struct pt_regs *regs)
1288 struct net_device *dev = dev_id;
1289 struct i596_private *lp;
1290 short ioaddr;
1291 unsigned short status, ack_cmd = 0;
1292 int handled = 0;
1294 #ifdef ENABLE_BVME6000_NET
1295 if (MACH_IS_BVME6000) {
1296 if (*(char *) BVME_LOCAL_IRQ_STAT & BVME_ETHERR) {
1297 i596_error(irq, dev_id, regs);
1298 return IRQ_HANDLED;
1301 #endif
1302 if (dev == NULL) {
1303 printk(KERN_ERR "i596_interrupt(): irq %d for unknown device.\n", irq);
1304 return IRQ_NONE;
1307 ioaddr = dev->base_addr;
1308 lp = dev->priv;
1310 spin_lock (&lp->lock);
1312 wait_cmd(dev,lp,100,"i596 interrupt, timeout");
1313 status = lp->scb.status;
1315 DEB(DEB_INTS,printk(KERN_DEBUG "%s: i596 interrupt, IRQ %d, status %4.4x.\n",
1316 dev->name, irq, status));
1318 ack_cmd = status & 0xf000;
1320 if ((status & 0x8000) || (status & 0x2000)) {
1321 struct i596_cmd *ptr;
1323 handled = 1;
1324 if ((status & 0x8000))
1325 DEB(DEB_INTS,printk(KERN_DEBUG "%s: i596 interrupt completed command.\n", dev->name));
1326 if ((status & 0x2000))
1327 DEB(DEB_INTS,printk(KERN_DEBUG "%s: i596 interrupt command unit inactive %x.\n", dev->name, status & 0x0700));
1329 while ((lp->cmd_head != I596_NULL) && (lp->cmd_head->status & STAT_C)) {
1330 ptr = lp->cmd_head;
1332 DEB(DEB_STATUS,printk(KERN_DEBUG "cmd_head->status = %04x, ->command = %04x\n",
1333 lp->cmd_head->status, lp->cmd_head->command));
1334 lp->cmd_head = ptr->v_next;
1335 lp->cmd_backlog--;
1337 switch ((ptr->command) & 0x7) {
1338 case CmdTx:
1340 struct tx_cmd *tx_cmd = (struct tx_cmd *) ptr;
1341 struct sk_buff *skb = tx_cmd->skb;
1343 if ((ptr->status) & STAT_OK) {
1344 DEB(DEB_TXADDR,print_eth(skb->data, "tx-done"));
1345 } else {
1346 lp->stats.tx_errors++;
1347 if ((ptr->status) & 0x0020)
1348 lp->stats.collisions++;
1349 if (!((ptr->status) & 0x0040))
1350 lp->stats.tx_heartbeat_errors++;
1351 if ((ptr->status) & 0x0400)
1352 lp->stats.tx_carrier_errors++;
1353 if ((ptr->status) & 0x0800)
1354 lp->stats.collisions++;
1355 if ((ptr->status) & 0x1000)
1356 lp->stats.tx_aborted_errors++;
1359 dev_kfree_skb_irq(skb);
1361 tx_cmd->cmd.command = 0; /* Mark free */
1362 break;
1364 case CmdTDR:
1366 unsigned short status = ((struct tdr_cmd *)ptr)->status;
1368 if (status & 0x8000) {
1369 DEB(DEB_TDR,printk(KERN_INFO "%s: link ok.\n", dev->name));
1370 } else {
1371 if (status & 0x4000)
1372 printk(KERN_ERR "%s: Transceiver problem.\n", dev->name);
1373 if (status & 0x2000)
1374 printk(KERN_ERR "%s: Termination problem.\n", dev->name);
1375 if (status & 0x1000)
1376 printk(KERN_ERR "%s: Short circuit.\n", dev->name);
1378 DEB(DEB_TDR,printk(KERN_INFO "%s: Time %d.\n", dev->name, status & 0x07ff));
1380 break;
1382 case CmdConfigure:
1383 case CmdMulticastList:
1384 /* Zap command so set_multicast_list() knows it is free */
1385 ptr->command = 0;
1386 break;
1388 ptr->v_next = ptr->b_next = I596_NULL;
1389 lp->last_cmd = jiffies;
1392 ptr = lp->cmd_head;
1393 while ((ptr != I596_NULL) && (ptr != lp->cmd_tail)) {
1394 ptr->command &= 0x1fff;
1395 ptr = ptr->v_next;
1398 if ((lp->cmd_head != I596_NULL))
1399 ack_cmd |= CUC_START;
1400 lp->scb.cmd = WSWAPcmd(virt_to_bus(&lp->cmd_head->status));
1402 if ((status & 0x1000) || (status & 0x4000)) {
1403 if ((status & 0x4000))
1404 DEB(DEB_INTS,printk(KERN_DEBUG "%s: i596 interrupt received a frame.\n", dev->name));
1405 i596_rx(dev);
1406 /* Only RX_START if stopped - RGH 07-07-96 */
1407 if (status & 0x1000) {
1408 if (netif_running(dev)) {
1409 DEB(DEB_ERRORS,printk(KERN_ERR "%s: i596 interrupt receive unit inactive, status 0x%x\n", dev->name, status));
1410 ack_cmd |= RX_START;
1411 lp->stats.rx_errors++;
1412 lp->stats.rx_fifo_errors++;
1413 rebuild_rx_bufs(dev);
1417 wait_cmd(dev,lp,100,"i596 interrupt, timeout");
1418 lp->scb.command = ack_cmd;
1420 #ifdef ENABLE_MVME16x_NET
1421 if (MACH_IS_MVME16x) {
1422 /* Ack the interrupt */
1424 volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000;
1426 pcc2[0x2a] |= 0x08;
1428 #endif
1429 #ifdef ENABLE_BVME6000_NET
1430 if (MACH_IS_BVME6000) {
1431 volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG;
1433 *ethirq = 1;
1434 *ethirq = 3;
1436 #endif
1437 #ifdef ENABLE_APRICOT
1438 (void) inb(ioaddr + 0x10);
1439 outb(4, ioaddr + 0xf);
1440 #endif
1441 CA(dev);
1443 DEB(DEB_INTS,printk(KERN_DEBUG "%s: exiting interrupt.\n", dev->name));
1445 spin_unlock (&lp->lock);
1446 return IRQ_RETVAL(handled);
1449 static int i596_close(struct net_device *dev)
1451 struct i596_private *lp = dev->priv;
1452 unsigned long flags;
1454 netif_stop_queue(dev);
1456 DEB(DEB_INIT,printk(KERN_DEBUG "%s: Shutting down ethercard, status was %4.4x.\n",
1457 dev->name, lp->scb.status));
1459 spin_lock_irqsave(&lp->lock, flags);
1461 wait_cmd(dev,lp,100,"close1 timed out");
1462 lp->scb.command = CUC_ABORT | RX_ABORT;
1463 CA(dev);
1465 wait_cmd(dev,lp,100,"close2 timed out");
1467 spin_unlock_irqrestore(&lp->lock, flags);
1468 DEB(DEB_STRUCT,i596_display_data(dev));
1469 i596_cleanup_cmd(dev,lp);
1471 #ifdef ENABLE_MVME16x_NET
1472 if (MACH_IS_MVME16x) {
1473 volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000;
1475 /* Disable all ints */
1476 pcc2[0x28] = 1;
1477 pcc2[0x2a] = 0x40;
1478 pcc2[0x2b] = 0x40; /* Set snooping bits now! */
1480 #endif
1481 #ifdef ENABLE_BVME6000_NET
1482 if (MACH_IS_BVME6000) {
1483 volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG;
1485 *ethirq = 1;
1487 #endif
1489 free_irq(dev->irq, dev);
1490 remove_rx_bufs(dev);
1492 return 0;
1495 static struct net_device_stats *
1496 i596_get_stats(struct net_device *dev)
1498 struct i596_private *lp = dev->priv;
1500 return &lp->stats;
1503 /*
1504 * Set or clear the multicast filter for this adaptor.
1505 */
1507 static void set_multicast_list(struct net_device *dev)
1509 struct i596_private *lp = dev->priv;
1510 int config = 0, cnt;
1512 DEB(DEB_MULTI,printk(KERN_DEBUG "%s: set multicast list, %d entries, promisc %s, allmulti %s\n",
1513 dev->name, dev->mc_count,
1514 dev->flags & IFF_PROMISC ? "ON" : "OFF",
1515 dev->flags & IFF_ALLMULTI ? "ON" : "OFF"));
1517 if (wait_cfg(dev, &lp->cf_cmd.cmd, 1000, "config change request timed out"))
1518 return;
1520 if ((dev->flags & IFF_PROMISC) && !(lp->cf_cmd.i596_config[8] & 0x01)) {
1521 lp->cf_cmd.i596_config[8] |= 0x01;
1522 config = 1;
1524 if (!(dev->flags & IFF_PROMISC) && (lp->cf_cmd.i596_config[8] & 0x01)) {
1525 lp->cf_cmd.i596_config[8] &= ~0x01;
1526 config = 1;
1528 if ((dev->flags & IFF_ALLMULTI) && (lp->cf_cmd.i596_config[11] & 0x20)) {
1529 lp->cf_cmd.i596_config[11] &= ~0x20;
1530 config = 1;
1532 if (!(dev->flags & IFF_ALLMULTI) && !(lp->cf_cmd.i596_config[11] & 0x20)) {
1533 lp->cf_cmd.i596_config[11] |= 0x20;
1534 config = 1;
1536 if (config) {
1537 lp->cf_cmd.cmd.command = CmdConfigure;
1538 i596_add_cmd(dev, &lp->cf_cmd.cmd);
1541 cnt = dev->mc_count;
1542 if (cnt > MAX_MC_CNT)
1544 cnt = MAX_MC_CNT;
1545 printk(KERN_ERR "%s: Only %d multicast addresses supported",
1546 dev->name, cnt);
1549 if (dev->mc_count > 0) {
1550 struct dev_mc_list *dmi;
1551 unsigned char *cp;
1552 struct mc_cmd *cmd;
1554 if (wait_cfg(dev, &lp->mc_cmd.cmd, 1000, "multicast list change request timed out"))
1555 return;
1556 cmd = &lp->mc_cmd;
1557 cmd->cmd.command = CmdMulticastList;
1558 cmd->mc_cnt = dev->mc_count * 6;
1559 cp = cmd->mc_addrs;
1560 for (dmi = dev->mc_list; cnt && dmi != NULL; dmi = dmi->next, cnt--, cp += 6) {
1561 memcpy(cp, dmi->dmi_addr, 6);
1562 if (i596_debug > 1)
1563 DEB(DEB_MULTI,printk(KERN_INFO "%s: Adding address %02x:%02x:%02x:%02x:%02x:%02x\n",
1564 dev->name, cp[0],cp[1],cp[2],cp[3],cp[4],cp[5]));
1566 i596_add_cmd(dev, &cmd->cmd);
1570 #ifdef MODULE
1571 static struct net_device *dev_82596;
1573 #ifdef ENABLE_APRICOT
1574 module_param(irq, int, 0);
1575 MODULE_PARM_DESC(irq, "Apricot IRQ number");
1576 #endif
1578 static int debug = -1;
1579 module_param(debug, int, 0);
1580 MODULE_PARM_DESC(debug, "i82596 debug mask");
1582 int __init init_module(void)
1584 if (debug >= 0)
1585 i596_debug = debug;
1586 dev_82596 = i82596_probe(-1);
1587 if (IS_ERR(dev_82596))
1588 return PTR_ERR(dev_82596);
1589 return 0;
1592 void __exit cleanup_module(void)
1594 unregister_netdev(dev_82596);
1595 #ifdef __mc68000__
1596 /* XXX This assumes default cache mode to be IOMAP_FULL_CACHING,
1597 * XXX which may be invalid (CONFIG_060_WRITETHROUGH)
1598 */
1600 kernel_set_cachemode((void *)(dev_82596->mem_start), 4096,
1601 IOMAP_FULL_CACHING);
1602 #endif
1603 free_page ((u32)(dev_82596->mem_start));
1604 #ifdef ENABLE_APRICOT
1605 /* If we don't do this, we can't re-insmod it later. */
1606 release_region(dev_82596->base_addr, I596_TOTAL_SIZE);
1607 #endif
1608 free_netdev(dev_82596);
1611 #endif /* MODULE */
1613 /*
1614 * Local variables:
1615 * compile-command: "gcc -D__KERNEL__ -I/usr/src/linux/net/inet -Wall -Wstrict-prototypes -O6 -m486 -c 82596.c"
1616 * End:
1617 */