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offb: the pseudo_palette is only 16 elements long
[linux-2.6/mini2440.git] / drivers / net / lib82596.c
blob5884f5bd04a455d00d75f67b5210b4da08529a9d
1 /* lasi_82596.c -- driver for the intel 82596 ethernet controller, as
2 munged into HPPA boxen .
3
4 This driver is based upon 82596.c, original credits are below...
5 but there were too many hoops which HP wants jumped through to
6 keep this code in there in a sane manner.
7
8 3 primary sources of the mess --
9 1) hppa needs *lots* of cacheline flushing to keep this kind of
10 MMIO running.
11
12 2) The 82596 needs to see all of its pointers as their physical
13 address. Thus virt_to_bus/bus_to_virt are *everywhere*.
14
15 3) The implementation HP is using seems to be significantly pickier
16 about when and how the command and RX units are started. some
17 command ordering was changed.
18
19 Examination of the mach driver leads one to believe that there
20 might be a saner way to pull this off... anyone who feels like a
21 full rewrite can be my guest.
22
23 Split 02/13/2000 Sam Creasey (sammy@oh.verio.com)
24
25 02/01/2000 Initial modifications for parisc by Helge Deller (deller@gmx.de)
26 03/02/2000 changes for better/correct(?) cache-flushing (deller)
27 */
28
29 /* 82596.c: A generic 82596 ethernet driver for linux. */
30 /*
31 Based on Apricot.c
32 Written 1994 by Mark Evans.
33 This driver is for the Apricot 82596 bus-master interface
34
35 Modularised 12/94 Mark Evans
36
37
38 Modified to support the 82596 ethernet chips on 680x0 VME boards.
39 by Richard Hirst <richard@sleepie.demon.co.uk>
40 Renamed to be 82596.c
41
42 980825: Changed to receive directly in to sk_buffs which are
43 allocated at open() time. Eliminates copy on incoming frames
44 (small ones are still copied). Shared data now held in a
45 non-cached page, so we can run on 68060 in copyback mode.
46
47 TBD:
48 * look at deferring rx frames rather than discarding (as per tulip)
49 * handle tx ring full as per tulip
50 * performace test to tune rx_copybreak
51
52 Most of my modifications relate to the braindead big-endian
53 implementation by Intel. When the i596 is operating in
54 'big-endian' mode, it thinks a 32 bit value of 0x12345678
55 should be stored as 0x56781234. This is a real pain, when
56 you have linked lists which are shared by the 680x0 and the
57 i596.
58
59 Driver skeleton
60 Written 1993 by Donald Becker.
61 Copyright 1993 United States Government as represented by the Director,
62 National Security Agency. This software may only be used and distributed
63 according to the terms of the GNU General Public License as modified by SRC,
64 incorporated herein by reference.
65
66 The author may be reached as becker@scyld.com, or C/O
67 Scyld Computing Corporation, 410 Severn Ave., Suite 210, Annapolis MD 21403
68
69 */
70
71 #include <linux/module.h>
72 #include <linux/kernel.h>
73 #include <linux/string.h>
74 #include <linux/errno.h>
75 #include <linux/ioport.h>
76 #include <linux/slab.h>
77 #include <linux/interrupt.h>
78 #include <linux/delay.h>
79 #include <linux/netdevice.h>
80 #include <linux/etherdevice.h>
81 #include <linux/skbuff.h>
82 #include <linux/init.h>
83 #include <linux/types.h>
84 #include <linux/bitops.h>
85 #include <linux/dma-mapping.h>
86 #include <linux/io.h>
87 #include <linux/irq.h>
88
89 /* DEBUG flags
90 */
91
92 #define DEB_INIT 0x0001
93 #define DEB_PROBE 0x0002
94 #define DEB_SERIOUS 0x0004
95 #define DEB_ERRORS 0x0008
96 #define DEB_MULTI 0x0010
97 #define DEB_TDR 0x0020
98 #define DEB_OPEN 0x0040
99 #define DEB_RESET 0x0080
100 #define DEB_ADDCMD 0x0100
101 #define DEB_STATUS 0x0200
102 #define DEB_STARTTX 0x0400
103 #define DEB_RXADDR 0x0800
104 #define DEB_TXADDR 0x1000
105 #define DEB_RXFRAME 0x2000
106 #define DEB_INTS 0x4000
107 #define DEB_STRUCT 0x8000
108 #define DEB_ANY 0xffff
109
110
111 #define DEB(x, y) if (i596_debug & (x)) { y; }
112
113
114 /*
115 * The MPU_PORT command allows direct access to the 82596. With PORT access
116 * the following commands are available (p5-18). The 32-bit port command
117 * must be word-swapped with the most significant word written first.
118 * This only applies to VME boards.
119 */
120 #define PORT_RESET 0x00 /* reset 82596 */
121 #define PORT_SELFTEST 0x01 /* selftest */
122 #define PORT_ALTSCP 0x02 /* alternate SCB address */
123 #define PORT_ALTDUMP 0x03 /* Alternate DUMP address */
124
125 static int i596_debug = (DEB_SERIOUS|DEB_PROBE);
126
127 /* Copy frames shorter than rx_copybreak, otherwise pass on up in
128 * a full sized sk_buff. Value of 100 stolen from tulip.c (!alpha).
129 */
130 static int rx_copybreak = 100;
131
132 #define PKT_BUF_SZ 1536
133 #define MAX_MC_CNT 64
134
135 #define ISCP_BUSY 0x0001
136
137 #define I596_NULL ((u32)0xffffffff)
138
139 #define CMD_EOL 0x8000 /* The last command of the list, stop. */
140 #define CMD_SUSP 0x4000 /* Suspend after doing cmd. */
141 #define CMD_INTR 0x2000 /* Interrupt after doing cmd. */
142
143 #define CMD_FLEX 0x0008 /* Enable flexible memory model */
144
145 enum commands {
146 CmdNOp = 0, CmdSASetup = 1, CmdConfigure = 2, CmdMulticastList = 3,
147 CmdTx = 4, CmdTDR = 5, CmdDump = 6, CmdDiagnose = 7
148 };
149
150 #define STAT_C 0x8000 /* Set to 0 after execution */
151 #define STAT_B 0x4000 /* Command being executed */
152 #define STAT_OK 0x2000 /* Command executed ok */
153 #define STAT_A 0x1000 /* Command aborted */
154
155 #define CUC_START 0x0100
156 #define CUC_RESUME 0x0200
157 #define CUC_SUSPEND 0x0300
158 #define CUC_ABORT 0x0400
159 #define RX_START 0x0010
160 #define RX_RESUME 0x0020
161 #define RX_SUSPEND 0x0030
162 #define RX_ABORT 0x0040
163
164 #define TX_TIMEOUT 5
165
166
167 struct i596_reg {
168 unsigned short porthi;
169 unsigned short portlo;
170 u32 ca;
171 };
172
173 #define EOF 0x8000
174 #define SIZE_MASK 0x3fff
175
176 struct i596_tbd {
177 unsigned short size;
178 unsigned short pad;
179 dma_addr_t next;
180 dma_addr_t data;
181 u32 cache_pad[5]; /* Total 32 bytes... */
182 };
183
184 /* The command structure has two 'next' pointers; v_next is the address of
185 * the next command as seen by the CPU, b_next is the address of the next
186 * command as seen by the 82596. The b_next pointer, as used by the 82596
187 * always references the status field of the next command, rather than the
188 * v_next field, because the 82596 is unaware of v_next. It may seem more
189 * logical to put v_next at the end of the structure, but we cannot do that
190 * because the 82596 expects other fields to be there, depending on command
191 * type.
192 */
193
194 struct i596_cmd {
195 struct i596_cmd *v_next; /* Address from CPUs viewpoint */
196 unsigned short status;
197 unsigned short command;
198 dma_addr_t b_next; /* Address from i596 viewpoint */
199 };
200
201 struct tx_cmd {
202 struct i596_cmd cmd;
203 dma_addr_t tbd;
204 unsigned short size;
205 unsigned short pad;
206 struct sk_buff *skb; /* So we can free it after tx */
207 dma_addr_t dma_addr;
208 #ifdef __LP64__
209 u32 cache_pad[6]; /* Total 64 bytes... */
210 #else
211 u32 cache_pad[1]; /* Total 32 bytes... */
212 #endif
213 };
214
215 struct tdr_cmd {
216 struct i596_cmd cmd;
217 unsigned short status;
218 unsigned short pad;
219 };
220
221 struct mc_cmd {
222 struct i596_cmd cmd;
223 short mc_cnt;
224 char mc_addrs[MAX_MC_CNT*6];
225 };
226
227 struct sa_cmd {
228 struct i596_cmd cmd;
229 char eth_addr[8];
230 };
231
232 struct cf_cmd {
233 struct i596_cmd cmd;
234 char i596_config[16];
235 };
236
237 struct i596_rfd {
238 unsigned short stat;
239 unsigned short cmd;
240 dma_addr_t b_next; /* Address from i596 viewpoint */
241 dma_addr_t rbd;
242 unsigned short count;
243 unsigned short size;
244 struct i596_rfd *v_next; /* Address from CPUs viewpoint */
245 struct i596_rfd *v_prev;
246 #ifndef __LP64__
247 u32 cache_pad[2]; /* Total 32 bytes... */
248 #endif
249 };
250
251 struct i596_rbd {
252 /* hardware data */
253 unsigned short count;
254 unsigned short zero1;
255 dma_addr_t b_next;
256 dma_addr_t b_data; /* Address from i596 viewpoint */
257 unsigned short size;
258 unsigned short zero2;
259 /* driver data */
260 struct sk_buff *skb;
261 struct i596_rbd *v_next;
262 dma_addr_t b_addr; /* This rbd addr from i596 view */
263 unsigned char *v_data; /* Address from CPUs viewpoint */
264 /* Total 32 bytes... */
265 #ifdef __LP64__
266 u32 cache_pad[4];
267 #endif
268 };
269
270 /* These values as chosen so struct i596_dma fits in one page... */
271
272 #define TX_RING_SIZE 32
273 #define RX_RING_SIZE 16
274
275 struct i596_scb {
276 unsigned short status;
277 unsigned short command;
278 dma_addr_t cmd;
279 dma_addr_t rfd;
280 u32 crc_err;
281 u32 align_err;
282 u32 resource_err;
283 u32 over_err;
284 u32 rcvdt_err;
285 u32 short_err;
286 unsigned short t_on;
287 unsigned short t_off;
288 };
289
290 struct i596_iscp {
291 u32 stat;
292 dma_addr_t scb;
293 };
294
295 struct i596_scp {
296 u32 sysbus;
297 u32 pad;
298 dma_addr_t iscp;
299 };
300
301 struct i596_dma {
302 struct i596_scp scp __attribute__((aligned(32)));
303 volatile struct i596_iscp iscp __attribute__((aligned(32)));
304 volatile struct i596_scb scb __attribute__((aligned(32)));
305 struct sa_cmd sa_cmd __attribute__((aligned(32)));
306 struct cf_cmd cf_cmd __attribute__((aligned(32)));
307 struct tdr_cmd tdr_cmd __attribute__((aligned(32)));
308 struct mc_cmd mc_cmd __attribute__((aligned(32)));
309 struct i596_rfd rfds[RX_RING_SIZE] __attribute__((aligned(32)));
310 struct i596_rbd rbds[RX_RING_SIZE] __attribute__((aligned(32)));
311 struct tx_cmd tx_cmds[TX_RING_SIZE] __attribute__((aligned(32)));
312 struct i596_tbd tbds[TX_RING_SIZE] __attribute__((aligned(32)));
313 };
314
315 struct i596_private {
316 struct i596_dma *dma;
317 u32 stat;
318 int last_restart;
319 struct i596_rfd *rfd_head;
320 struct i596_rbd *rbd_head;
321 struct i596_cmd *cmd_tail;
322 struct i596_cmd *cmd_head;
323 int cmd_backlog;
324 u32 last_cmd;
325 struct net_device_stats stats;
326 int next_tx_cmd;
327 int options;
328 spinlock_t lock; /* serialize access to chip */
329 dma_addr_t dma_addr;
330 void __iomem *mpu_port;
331 void __iomem *ca;
332 };
333
334 static const char init_setup[] =
335 {
336 0x8E, /* length, prefetch on */
337 0xC8, /* fifo to 8, monitor off */
338 0x80, /* don't save bad frames */
339 0x2E, /* No source address insertion, 8 byte preamble */
340 0x00, /* priority and backoff defaults */
341 0x60, /* interframe spacing */
342 0x00, /* slot time LSB */
343 0xf2, /* slot time and retries */
344 0x00, /* promiscuous mode */
345 0x00, /* collision detect */
346 0x40, /* minimum frame length */
347 0xff,
348 0x00,
349 0x7f /* *multi IA */ };
350
351 static int i596_open(struct net_device *dev);
352 static int i596_start_xmit(struct sk_buff *skb, struct net_device *dev);
353 static irqreturn_t i596_interrupt(int irq, void *dev_id);
354 static int i596_close(struct net_device *dev);
355 static struct net_device_stats *i596_get_stats(struct net_device *dev);
356 static void i596_add_cmd(struct net_device *dev, struct i596_cmd *cmd);
357 static void i596_tx_timeout (struct net_device *dev);
358 static void print_eth(unsigned char *buf, char *str);
359 static void set_multicast_list(struct net_device *dev);
360 static inline void ca(struct net_device *dev);
361 static void mpu_port(struct net_device *dev, int c, dma_addr_t x);
362
363 static int rx_ring_size = RX_RING_SIZE;
364 static int ticks_limit = 100;
365 static int max_cmd_backlog = TX_RING_SIZE-1;
366
367 #ifdef CONFIG_NET_POLL_CONTROLLER
368 static void i596_poll_controller(struct net_device *dev);
369 #endif
370
371
372 static inline int wait_istat(struct net_device *dev, struct i596_dma *dma, int delcnt, char *str)
373 {
374 DMA_INV(dev, &(dma->iscp), sizeof(struct i596_iscp));
375 while (--delcnt && dma->iscp.stat) {
376 udelay(10);
377 DMA_INV(dev, &(dma->iscp), sizeof(struct i596_iscp));
378 }
379 if (!delcnt) {
380 printk(KERN_ERR "%s: %s, iscp.stat %04x, didn't clear\n",
381 dev->name, str, SWAP16(dma->iscp.stat));
382 return -1;
383 } else
384 return 0;
385 }
386
387
388 static inline int wait_cmd(struct net_device *dev, struct i596_dma *dma, int delcnt, char *str)
389 {
390 DMA_INV(dev, &(dma->scb), sizeof(struct i596_scb));
391 while (--delcnt && dma->scb.command) {
392 udelay(10);
393 DMA_INV(dev, &(dma->scb), sizeof(struct i596_scb));
394 }
395 if (!delcnt) {
396 printk(KERN_ERR "%s: %s, status %4.4x, cmd %4.4x.\n",
397 dev->name, str,
398 SWAP16(dma->scb.status),
399 SWAP16(dma->scb.command));
400 return -1;
401 } else
402 return 0;
403 }
404
405
406 static void i596_display_data(struct net_device *dev)
407 {
408 struct i596_private *lp = netdev_priv(dev);
409 struct i596_dma *dma = lp->dma;
410 struct i596_cmd *cmd;
411 struct i596_rfd *rfd;
412 struct i596_rbd *rbd;
413
414 printk(KERN_DEBUG "lp and scp at %p, .sysbus = %08x, .iscp = %08x\n",
415 &dma->scp, dma->scp.sysbus, SWAP32(dma->scp.iscp));
416 printk(KERN_DEBUG "iscp at %p, iscp.stat = %08x, .scb = %08x\n",
417 &dma->iscp, SWAP32(dma->iscp.stat), SWAP32(dma->iscp.scb));
418 printk(KERN_DEBUG "scb at %p, scb.status = %04x, .command = %04x,"
419 " .cmd = %08x, .rfd = %08x\n",
420 &dma->scb, SWAP16(dma->scb.status), SWAP16(dma->scb.command),
421 SWAP16(dma->scb.cmd), SWAP32(dma->scb.rfd));
422 printk(KERN_DEBUG " errors: crc %x, align %x, resource %x,"
423 " over %x, rcvdt %x, short %x\n",
424 SWAP32(dma->scb.crc_err), SWAP32(dma->scb.align_err),
425 SWAP32(dma->scb.resource_err), SWAP32(dma->scb.over_err),
426 SWAP32(dma->scb.rcvdt_err), SWAP32(dma->scb.short_err));
427 cmd = lp->cmd_head;
428 while (cmd != NULL) {
429 printk(KERN_DEBUG
430 "cmd at %p, .status = %04x, .command = %04x,"
431 " .b_next = %08x\n",
432 cmd, SWAP16(cmd->status), SWAP16(cmd->command),
433 SWAP32(cmd->b_next));
434 cmd = cmd->v_next;
435 }
436 rfd = lp->rfd_head;
437 printk(KERN_DEBUG "rfd_head = %p\n", rfd);
438 do {
439 printk(KERN_DEBUG
440 " %p .stat %04x, .cmd %04x, b_next %08x, rbd %08x,"
441 " count %04x\n",
442 rfd, SWAP16(rfd->stat), SWAP16(rfd->cmd),
443 SWAP32(rfd->b_next), SWAP32(rfd->rbd),
444 SWAP16(rfd->count));
445 rfd = rfd->v_next;
446 } while (rfd != lp->rfd_head);
447 rbd = lp->rbd_head;
448 printk(KERN_DEBUG "rbd_head = %p\n", rbd);
449 do {
450 printk(KERN_DEBUG
451 " %p .count %04x, b_next %08x, b_data %08x,"
452 " size %04x\n",
453 rbd, SWAP16(rbd->count), SWAP32(rbd->b_next),
454 SWAP32(rbd->b_data), SWAP16(rbd->size));
455 rbd = rbd->v_next;
456 } while (rbd != lp->rbd_head);
457 DMA_INV(dev, dma, sizeof(struct i596_dma));
458 }
459
460
461 #define virt_to_dma(lp, v) ((lp)->dma_addr + (dma_addr_t)((unsigned long)(v)-(unsigned long)((lp)->dma)))
462
463 static inline int init_rx_bufs(struct net_device *dev)
464 {
465 struct i596_private *lp = netdev_priv(dev);
466 struct i596_dma *dma = lp->dma;
467 int i;
468 struct i596_rfd *rfd;
469 struct i596_rbd *rbd;
470
471 /* First build the Receive Buffer Descriptor List */
472
473 for (i = 0, rbd = dma->rbds; i < rx_ring_size; i++, rbd++) {
474 dma_addr_t dma_addr;
475 struct sk_buff *skb = netdev_alloc_skb(dev, PKT_BUF_SZ + 4);
476
477 if (skb == NULL)
478 return -1;
479 skb_reserve(skb, 2);
480 dma_addr = dma_map_single(dev->dev.parent, skb->data,
481 PKT_BUF_SZ, DMA_FROM_DEVICE);
482 rbd->v_next = rbd+1;
483 rbd->b_next = SWAP32(virt_to_dma(lp, rbd+1));
484 rbd->b_addr = SWAP32(virt_to_dma(lp, rbd));
485 rbd->skb = skb;
486 rbd->v_data = skb->data;
487 rbd->b_data = SWAP32(dma_addr);
488 rbd->size = SWAP16(PKT_BUF_SZ);
489 }
490 lp->rbd_head = dma->rbds;
491 rbd = dma->rbds + rx_ring_size - 1;
492 rbd->v_next = dma->rbds;
493 rbd->b_next = SWAP32(virt_to_dma(lp, dma->rbds));
494
495 /* Now build the Receive Frame Descriptor List */
496
497 for (i = 0, rfd = dma->rfds; i < rx_ring_size; i++, rfd++) {
498 rfd->rbd = I596_NULL;
499 rfd->v_next = rfd+1;
500 rfd->v_prev = rfd-1;
501 rfd->b_next = SWAP32(virt_to_dma(lp, rfd+1));
502 rfd->cmd = SWAP16(CMD_FLEX);
503 }
504 lp->rfd_head = dma->rfds;
505 dma->scb.rfd = SWAP32(virt_to_dma(lp, dma->rfds));
506 rfd = dma->rfds;
507 rfd->rbd = SWAP32(virt_to_dma(lp, lp->rbd_head));
508 rfd->v_prev = dma->rfds + rx_ring_size - 1;
509 rfd = dma->rfds + rx_ring_size - 1;
510 rfd->v_next = dma->rfds;
511 rfd->b_next = SWAP32(virt_to_dma(lp, dma->rfds));
512 rfd->cmd = SWAP16(CMD_EOL|CMD_FLEX);
513
514 DMA_WBACK_INV(dev, dma, sizeof(struct i596_dma));
515 return 0;
516 }
517
518 static inline void remove_rx_bufs(struct net_device *dev)
519 {
520 struct i596_private *lp = netdev_priv(dev);
521 struct i596_rbd *rbd;
522 int i;
523
524 for (i = 0, rbd = lp->dma->rbds; i < rx_ring_size; i++, rbd++) {
525 if (rbd->skb == NULL)
526 break;
527 dma_unmap_single(dev->dev.parent,
528 (dma_addr_t)SWAP32(rbd->b_data),
529 PKT_BUF_SZ, DMA_FROM_DEVICE);
530 dev_kfree_skb(rbd->skb);
531 }
532 }
533
534
535 static void rebuild_rx_bufs(struct net_device *dev)
536 {
537 struct i596_private *lp = netdev_priv(dev);
538 struct i596_dma *dma = lp->dma;
539 int i;
540
541 /* Ensure rx frame/buffer descriptors are tidy */
542
543 for (i = 0; i < rx_ring_size; i++) {
544 dma->rfds[i].rbd = I596_NULL;
545 dma->rfds[i].cmd = SWAP16(CMD_FLEX);
546 }
547 dma->rfds[rx_ring_size-1].cmd = SWAP16(CMD_EOL|CMD_FLEX);
548 lp->rfd_head = dma->rfds;
549 dma->scb.rfd = SWAP32(virt_to_dma(lp, dma->rfds));
550 lp->rbd_head = dma->rbds;
551 dma->rfds[0].rbd = SWAP32(virt_to_dma(lp, dma->rbds));
552
553 DMA_WBACK_INV(dev, dma, sizeof(struct i596_dma));
554 }
555
556
557 static int init_i596_mem(struct net_device *dev)
558 {
559 struct i596_private *lp = netdev_priv(dev);
560 struct i596_dma *dma = lp->dma;
561 unsigned long flags;
562
563 mpu_port(dev, PORT_RESET, 0);
564 udelay(100); /* Wait 100us - seems to help */
565
566 /* change the scp address */
567
568 lp->last_cmd = jiffies;
569
570 dma->scp.sysbus = SYSBUS;
571 dma->scp.iscp = SWAP32(virt_to_dma(lp, &(dma->iscp)));
572 dma->iscp.scb = SWAP32(virt_to_dma(lp, &(dma->scb)));
573 dma->iscp.stat = SWAP32(ISCP_BUSY);
574 lp->cmd_backlog = 0;
575
576 lp->cmd_head = NULL;
577 dma->scb.cmd = I596_NULL;
578
579 DEB(DEB_INIT, printk(KERN_DEBUG "%s: starting i82596.\n", dev->name));
580
581 DMA_WBACK(dev, &(dma->scp), sizeof(struct i596_scp));
582 DMA_WBACK(dev, &(dma->iscp), sizeof(struct i596_iscp));
583 DMA_WBACK(dev, &(dma->scb), sizeof(struct i596_scb));
584
585 mpu_port(dev, PORT_ALTSCP, virt_to_dma(lp, &dma->scp));
586 ca(dev);
587 if (wait_istat(dev, dma, 1000, "initialization timed out"))
588 goto failed;
589 DEB(DEB_INIT, printk(KERN_DEBUG
590 "%s: i82596 initialization successful\n",
591 dev->name));
592
593 if (request_irq(dev->irq, &i596_interrupt, 0, "i82596", dev)) {
594 printk(KERN_ERR "%s: IRQ %d not free\n", dev->name, dev->irq);
595 goto failed;
596 }
597
598 /* Ensure rx frame/buffer descriptors are tidy */
599 rebuild_rx_bufs(dev);
600
601 dma->scb.command = 0;
602 DMA_WBACK(dev, &(dma->scb), sizeof(struct i596_scb));
603
604 DEB(DEB_INIT, printk(KERN_DEBUG
605 "%s: queuing CmdConfigure\n", dev->name));
606 memcpy(dma->cf_cmd.i596_config, init_setup, 14);
607 dma->cf_cmd.cmd.command = SWAP16(CmdConfigure);
608 DMA_WBACK(dev, &(dma->cf_cmd), sizeof(struct cf_cmd));
609 i596_add_cmd(dev, &dma->cf_cmd.cmd);
610
611 DEB(DEB_INIT, printk(KERN_DEBUG "%s: queuing CmdSASetup\n", dev->name));
612 memcpy(dma->sa_cmd.eth_addr, dev->dev_addr, 6);
613 dma->sa_cmd.cmd.command = SWAP16(CmdSASetup);
614 DMA_WBACK(dev, &(dma->sa_cmd), sizeof(struct sa_cmd));
615 i596_add_cmd(dev, &dma->sa_cmd.cmd);
616
617 DEB(DEB_INIT, printk(KERN_DEBUG "%s: queuing CmdTDR\n", dev->name));
618 dma->tdr_cmd.cmd.command = SWAP16(CmdTDR);
619 DMA_WBACK(dev, &(dma->tdr_cmd), sizeof(struct tdr_cmd));
620 i596_add_cmd(dev, &dma->tdr_cmd.cmd);
621
622 spin_lock_irqsave (&lp->lock, flags);
623
624 if (wait_cmd(dev, dma, 1000, "timed out waiting to issue RX_START")) {
625 spin_unlock_irqrestore (&lp->lock, flags);
626 goto failed_free_irq;
627 }
628 DEB(DEB_INIT, printk(KERN_DEBUG "%s: Issuing RX_START\n", dev->name));
629 dma->scb.command = SWAP16(RX_START);
630 dma->scb.rfd = SWAP32(virt_to_dma(lp, dma->rfds));
631 DMA_WBACK(dev, &(dma->scb), sizeof(struct i596_scb));
632
633 ca(dev);
634
635 spin_unlock_irqrestore (&lp->lock, flags);
636 if (wait_cmd(dev, dma, 1000, "RX_START not processed"))
637 goto failed_free_irq;
638 DEB(DEB_INIT, printk(KERN_DEBUG
639 "%s: Receive unit started OK\n", dev->name));
640 return 0;
641
642 failed_free_irq:
643 free_irq(dev->irq, dev);
644 failed:
645 printk(KERN_ERR "%s: Failed to initialise 82596\n", dev->name);
646 mpu_port(dev, PORT_RESET, 0);
647 return -1;
648 }
649
650
651 static inline int i596_rx(struct net_device *dev)
652 {
653 struct i596_private *lp = netdev_priv(dev);
654 struct i596_rfd *rfd;
655 struct i596_rbd *rbd;
656 int frames = 0;
657
658 DEB(DEB_RXFRAME, printk(KERN_DEBUG
659 "i596_rx(), rfd_head %p, rbd_head %p\n",
660 lp->rfd_head, lp->rbd_head));
661
662
663 rfd = lp->rfd_head; /* Ref next frame to check */
664
665 DMA_INV(dev, rfd, sizeof(struct i596_rfd));
666 while (rfd->stat & SWAP16(STAT_C)) { /* Loop while complete frames */
667 if (rfd->rbd == I596_NULL)
668 rbd = NULL;
669 else if (rfd->rbd == lp->rbd_head->b_addr) {
670 rbd = lp->rbd_head;
671 DMA_INV(dev, rbd, sizeof(struct i596_rbd));
672 } else {
673 printk(KERN_ERR "%s: rbd chain broken!\n", dev->name);
674 /* XXX Now what? */
675 rbd = NULL;
676 }
677 DEB(DEB_RXFRAME, printk(KERN_DEBUG
678 " rfd %p, rfd.rbd %08x, rfd.stat %04x\n",
679 rfd, rfd->rbd, rfd->stat));
680
681 if (rbd != NULL && (rfd->stat & SWAP16(STAT_OK))) {
682 /* a good frame */
683 int pkt_len = SWAP16(rbd->count) & 0x3fff;
684 struct sk_buff *skb = rbd->skb;
685 int rx_in_place = 0;
686
687 DEB(DEB_RXADDR, print_eth(rbd->v_data, "received"));
688 frames++;
689
690 /* Check if the packet is long enough to just accept
691 * without copying to a properly sized skbuff.
692 */
693
694 if (pkt_len > rx_copybreak) {
695 struct sk_buff *newskb;
696 dma_addr_t dma_addr;
697
698 dma_unmap_single(dev->dev.parent,
699 (dma_addr_t)SWAP32(rbd->b_data),
700 PKT_BUF_SZ, DMA_FROM_DEVICE);
701 /* Get fresh skbuff to replace filled one. */
702 newskb = netdev_alloc_skb(dev, PKT_BUF_SZ + 4);
703 if (newskb == NULL) {
704 skb = NULL; /* drop pkt */
705 goto memory_squeeze;
706 }
707 skb_reserve(newskb, 2);
708
709 /* Pass up the skb already on the Rx ring. */
710 skb_put(skb, pkt_len);
711 rx_in_place = 1;
712 rbd->skb = newskb;
713 dma_addr = dma_map_single(dev->dev.parent,
714 newskb->data,
715 PKT_BUF_SZ,
716 DMA_FROM_DEVICE);
717 rbd->v_data = newskb->data;
718 rbd->b_data = SWAP32(dma_addr);
719 DMA_WBACK_INV(dev, rbd, sizeof(struct i596_rbd));
720 } else
721 skb = netdev_alloc_skb(dev, pkt_len + 2);
722 memory_squeeze:
723 if (skb == NULL) {
724 /* XXX tulip.c can defer packets here!! */
725 printk(KERN_ERR
726 "%s: i596_rx Memory squeeze, dropping packet.\n",
727 dev->name);
728 lp->stats.rx_dropped++;
729 } else {
730 if (!rx_in_place) {
731 /* 16 byte align the data fields */
732 dma_sync_single_for_cpu(dev->dev.parent,
733 (dma_addr_t)SWAP32(rbd->b_data),
734 PKT_BUF_SZ, DMA_FROM_DEVICE);
735 skb_reserve(skb, 2);
736 memcpy(skb_put(skb, pkt_len), rbd->v_data, pkt_len);
737 dma_sync_single_for_device(dev->dev.parent,
738 (dma_addr_t)SWAP32(rbd->b_data),
739 PKT_BUF_SZ, DMA_FROM_DEVICE);
740 }
741 skb->len = pkt_len;
742 skb->protocol = eth_type_trans(skb, dev);
743 netif_rx(skb);
744 dev->last_rx = jiffies;
745 lp->stats.rx_packets++;
746 lp->stats.rx_bytes += pkt_len;
747 }
748 } else {
749 DEB(DEB_ERRORS, printk(KERN_DEBUG
750 "%s: Error, rfd.stat = 0x%04x\n",
751 dev->name, rfd->stat));
752 lp->stats.rx_errors++;
753 if (rfd->stat & SWAP16(0x0100))
754 lp->stats.collisions++;
755 if (rfd->stat & SWAP16(0x8000))
756 lp->stats.rx_length_errors++;
757 if (rfd->stat & SWAP16(0x0001))
758 lp->stats.rx_over_errors++;
759 if (rfd->stat & SWAP16(0x0002))
760 lp->stats.rx_fifo_errors++;
761 if (rfd->stat & SWAP16(0x0004))
762 lp->stats.rx_frame_errors++;
763 if (rfd->stat & SWAP16(0x0008))
764 lp->stats.rx_crc_errors++;
765 if (rfd->stat & SWAP16(0x0010))
766 lp->stats.rx_length_errors++;
767 }
768
769 /* Clear the buffer descriptor count and EOF + F flags */
770
771 if (rbd != NULL && (rbd->count & SWAP16(0x4000))) {
772 rbd->count = 0;
773 lp->rbd_head = rbd->v_next;
774 DMA_WBACK_INV(dev, rbd, sizeof(struct i596_rbd));
775 }
776
777 /* Tidy the frame descriptor, marking it as end of list */
778
779 rfd->rbd = I596_NULL;
780 rfd->stat = 0;
781 rfd->cmd = SWAP16(CMD_EOL|CMD_FLEX);
782 rfd->count = 0;
783
784 /* Update record of next frame descriptor to process */
785
786 lp->dma->scb.rfd = rfd->b_next;
787 lp->rfd_head = rfd->v_next;
788 DMA_WBACK_INV(dev, rfd, sizeof(struct i596_rfd));
789
790 /* Remove end-of-list from old end descriptor */
791
792 rfd->v_prev->cmd = SWAP16(CMD_FLEX);
793 DMA_WBACK_INV(dev, rfd->v_prev, sizeof(struct i596_rfd));
794 rfd = lp->rfd_head;
795 DMA_INV(dev, rfd, sizeof(struct i596_rfd));
796 }
797
798 DEB(DEB_RXFRAME, printk(KERN_DEBUG "frames %d\n", frames));
799
800 return 0;
801 }
802
803
804 static inline void i596_cleanup_cmd(struct net_device *dev, struct i596_private *lp)
805 {
806 struct i596_cmd *ptr;
807
808 while (lp->cmd_head != NULL) {
809 ptr = lp->cmd_head;
810 lp->cmd_head = ptr->v_next;
811 lp->cmd_backlog--;
812
813 switch (SWAP16(ptr->command) & 0x7) {
814 case CmdTx:
815 {
816 struct tx_cmd *tx_cmd = (struct tx_cmd *) ptr;
817 struct sk_buff *skb = tx_cmd->skb;
818 dma_unmap_single(dev->dev.parent,
819 tx_cmd->dma_addr,
820 skb->len, DMA_TO_DEVICE);
821
822 dev_kfree_skb(skb);
823
824 lp->stats.tx_errors++;
825 lp->stats.tx_aborted_errors++;
826
827 ptr->v_next = NULL;
828 ptr->b_next = I596_NULL;
829 tx_cmd->cmd.command = 0; /* Mark as free */
830 break;
831 }
832 default:
833 ptr->v_next = NULL;
834 ptr->b_next = I596_NULL;
835 }
836 DMA_WBACK_INV(dev, ptr, sizeof(struct i596_cmd));
837 }
838
839 wait_cmd(dev, lp->dma, 100, "i596_cleanup_cmd timed out");
840 lp->dma->scb.cmd = I596_NULL;
841 DMA_WBACK(dev, &(lp->dma->scb), sizeof(struct i596_scb));
842 }
843
844
845 static inline void i596_reset(struct net_device *dev, struct i596_private *lp)
846 {
847 unsigned long flags;
848
849 DEB(DEB_RESET, printk(KERN_DEBUG "i596_reset\n"));
850
851 spin_lock_irqsave (&lp->lock, flags);
852
853 wait_cmd(dev, lp->dma, 100, "i596_reset timed out");
854
855 netif_stop_queue(dev);
856
857 /* FIXME: this command might cause an lpmc */
858 lp->dma->scb.command = SWAP16(CUC_ABORT | RX_ABORT);
859 DMA_WBACK(dev, &(lp->dma->scb), sizeof(struct i596_scb));
860 ca(dev);
861
862 /* wait for shutdown */
863 wait_cmd(dev, lp->dma, 1000, "i596_reset 2 timed out");
864 spin_unlock_irqrestore (&lp->lock, flags);
865
866 i596_cleanup_cmd(dev, lp);
867 i596_rx(dev);
868
869 netif_start_queue(dev);
870 init_i596_mem(dev);
871 }
872
873
874 static void i596_add_cmd(struct net_device *dev, struct i596_cmd *cmd)
875 {
876 struct i596_private *lp = netdev_priv(dev);
877 struct i596_dma *dma = lp->dma;
878 unsigned long flags;
879
880 DEB(DEB_ADDCMD, printk(KERN_DEBUG "i596_add_cmd cmd_head %p\n",
881 lp->cmd_head));
882
883 cmd->status = 0;
884 cmd->command |= SWAP16(CMD_EOL | CMD_INTR);
885 cmd->v_next = NULL;
886 cmd->b_next = I596_NULL;
887 DMA_WBACK(dev, cmd, sizeof(struct i596_cmd));
888
889 spin_lock_irqsave (&lp->lock, flags);
890
891 if (lp->cmd_head != NULL) {
892 lp->cmd_tail->v_next = cmd;
893 lp->cmd_tail->b_next = SWAP32(virt_to_dma(lp, &cmd->status));
894 DMA_WBACK(dev, lp->cmd_tail, sizeof(struct i596_cmd));
895 } else {
896 lp->cmd_head = cmd;
897 wait_cmd(dev, dma, 100, "i596_add_cmd timed out");
898 dma->scb.cmd = SWAP32(virt_to_dma(lp, &cmd->status));
899 dma->scb.command = SWAP16(CUC_START);
900 DMA_WBACK(dev, &(dma->scb), sizeof(struct i596_scb));
901 ca(dev);
902 }
903 lp->cmd_tail = cmd;
904 lp->cmd_backlog++;
905
906 spin_unlock_irqrestore (&lp->lock, flags);
907
908 if (lp->cmd_backlog > max_cmd_backlog) {
909 unsigned long tickssofar = jiffies - lp->last_cmd;
910
911 if (tickssofar < ticks_limit)
912 return;
913
914 printk(KERN_ERR
915 "%s: command unit timed out, status resetting.\n",
916 dev->name);
917 #if 1
918 i596_reset(dev, lp);
919 #endif
920 }
921 }
922
923 static int i596_open(struct net_device *dev)
924 {
925 DEB(DEB_OPEN, printk(KERN_DEBUG
926 "%s: i596_open() irq %d.\n", dev->name, dev->irq));
927
928 if (init_rx_bufs(dev)) {
929 printk(KERN_ERR "%s: Failed to init rx bufs\n", dev->name);
930 return -EAGAIN;
931 }
932 if (init_i596_mem(dev)) {
933 printk(KERN_ERR "%s: Failed to init memory\n", dev->name);
934 goto out_remove_rx_bufs;
935 }
936 netif_start_queue(dev);
937
938 return 0;
939
940 out_remove_rx_bufs:
941 remove_rx_bufs(dev);
942 return -EAGAIN;
943 }
944
945 static void i596_tx_timeout (struct net_device *dev)
946 {
947 struct i596_private *lp = netdev_priv(dev);
948
949 /* Transmitter timeout, serious problems. */
950 DEB(DEB_ERRORS, printk(KERN_DEBUG
951 "%s: transmit timed out, status resetting.\n",
952 dev->name));
953
954 lp->stats.tx_errors++;
955
956 /* Try to restart the adaptor */
957 if (lp->last_restart == lp->stats.tx_packets) {
958 DEB(DEB_ERRORS, printk(KERN_DEBUG "Resetting board.\n"));
959 /* Shutdown and restart */
960 i596_reset (dev, lp);
961 } else {
962 /* Issue a channel attention signal */
963 DEB(DEB_ERRORS, printk(KERN_DEBUG "Kicking board.\n"));
964 lp->dma->scb.command = SWAP16(CUC_START | RX_START);
965 DMA_WBACK_INV(dev, &(lp->dma->scb), sizeof(struct i596_scb));
966 ca (dev);
967 lp->last_restart = lp->stats.tx_packets;
968 }
969
970 dev->trans_start = jiffies;
971 netif_wake_queue (dev);
972 }
973
974
975 static int i596_start_xmit(struct sk_buff *skb, struct net_device *dev)
976 {
977 struct i596_private *lp = netdev_priv(dev);
978 struct tx_cmd *tx_cmd;
979 struct i596_tbd *tbd;
980 short length = skb->len;
981 dev->trans_start = jiffies;
982
983 DEB(DEB_STARTTX, printk(KERN_DEBUG
984 "%s: i596_start_xmit(%x,%p) called\n",
985 dev->name, skb->len, skb->data));
986
987 if (length < ETH_ZLEN) {
988 if (skb_padto(skb, ETH_ZLEN))
989 return 0;
990 length = ETH_ZLEN;
991 }
992
993 netif_stop_queue(dev);
994
995 tx_cmd = lp->dma->tx_cmds + lp->next_tx_cmd;
996 tbd = lp->dma->tbds + lp->next_tx_cmd;
997
998 if (tx_cmd->cmd.command) {
999 DEB(DEB_ERRORS, printk(KERN_DEBUG
1000 "%s: xmit ring full, dropping packet.\n",
1001 dev->name));
1002 lp->stats.tx_dropped++;
1003
1004 dev_kfree_skb(skb);
1005 } else {
1006 if (++lp->next_tx_cmd == TX_RING_SIZE)
1007 lp->next_tx_cmd = 0;
1008 tx_cmd->tbd = SWAP32(virt_to_dma(lp, tbd));
1009 tbd->next = I596_NULL;
1010
1011 tx_cmd->cmd.command = SWAP16(CMD_FLEX | CmdTx);
1012 tx_cmd->skb = skb;
1013
1014 tx_cmd->pad = 0;
1015 tx_cmd->size = 0;
1016 tbd->pad = 0;
1017 tbd->size = SWAP16(EOF | length);
1018
1019 tx_cmd->dma_addr = dma_map_single(dev->dev.parent, skb->data,
1020 skb->len, DMA_TO_DEVICE);
1021 tbd->data = SWAP32(tx_cmd->dma_addr);
1022
1023 DEB(DEB_TXADDR, print_eth(skb->data, "tx-queued"));
1024 DMA_WBACK_INV(dev, tx_cmd, sizeof(struct tx_cmd));
1025 DMA_WBACK_INV(dev, tbd, sizeof(struct i596_tbd));
1026 i596_add_cmd(dev, &tx_cmd->cmd);
1027
1028 lp->stats.tx_packets++;
1029 lp->stats.tx_bytes += length;
1030 }
1031
1032 netif_start_queue(dev);
1033
1034 return 0;
1035 }
1036
1037 static void print_eth(unsigned char *add, char *str)
1038 {
1039 int i;
1040
1041 printk(KERN_DEBUG "i596 0x%p, ", add);
1042 for (i = 0; i < 6; i++)
1043 printk(" %02X", add[i + 6]);
1044 printk(" -->");
1045 for (i = 0; i < 6; i++)
1046 printk(" %02X", add[i]);
1047 printk(" %02X%02X, %s\n", add[12], add[13], str);
1048 }
1049
1050 static int __devinit i82596_probe(struct net_device *dev)
1051 {
1052 int i;
1053 struct i596_private *lp = netdev_priv(dev);
1054 struct i596_dma *dma;
1055
1056 /* This lot is ensure things have been cache line aligned. */
1057 BUILD_BUG_ON(sizeof(struct i596_rfd) != 32);
1058 BUILD_BUG_ON(sizeof(struct i596_rbd) & 31);
1059 BUILD_BUG_ON(sizeof(struct tx_cmd) & 31);
1060 BUILD_BUG_ON(sizeof(struct i596_tbd) != 32);
1061 #ifndef __LP64__
1062 BUILD_BUG_ON(sizeof(struct i596_dma) > 4096);
1063 #endif
1064
1065 if (!dev->base_addr || !dev->irq)
1066 return -ENODEV;
1067
1068 dma = (struct i596_dma *) DMA_ALLOC(dev->dev.parent,
1069 sizeof(struct i596_dma), &lp->dma_addr, GFP_KERNEL);
1070 if (!dma) {
1071 printk(KERN_ERR "%s: Couldn't get shared memory\n", __FILE__);
1072 return -ENOMEM;
1073 }
1074
1075 /* The 82596-specific entries in the device structure. */
1076 dev->open = i596_open;
1077 dev->stop = i596_close;
1078 dev->hard_start_xmit = i596_start_xmit;
1079 dev->get_stats = i596_get_stats;
1080 dev->set_multicast_list = set_multicast_list;
1081 dev->tx_timeout = i596_tx_timeout;
1082 dev->watchdog_timeo = TX_TIMEOUT;
1083 #ifdef CONFIG_NET_POLL_CONTROLLER
1084 dev->poll_controller = i596_poll_controller;
1085 #endif
1086
1087 memset(dma, 0, sizeof(struct i596_dma));
1088 lp->dma = dma;
1089
1090 dma->scb.command = 0;
1091 dma->scb.cmd = I596_NULL;
1092 dma->scb.rfd = I596_NULL;
1093 spin_lock_init(&lp->lock);
1094
1095 DMA_WBACK_INV(dev, dma, sizeof(struct i596_dma));
1096
1097 i = register_netdev(dev);
1098 if (i) {
1099 DMA_FREE(dev->dev.parent, sizeof(struct i596_dma),
1100 (void *)dma, lp->dma_addr);
1101 return i;
1102 };
1103
1104 DEB(DEB_PROBE, printk(KERN_INFO "%s: 82596 at %#3lx,",
1105 dev->name, dev->base_addr));
1106 for (i = 0; i < 6; i++)
1107 DEB(DEB_PROBE, printk(" %2.2X", dev->dev_addr[i]));
1108 DEB(DEB_PROBE, printk(" IRQ %d.\n", dev->irq));
1109 DEB(DEB_INIT, printk(KERN_INFO
1110 "%s: dma at 0x%p (%d bytes), lp->scb at 0x%p\n",
1111 dev->name, dma, (int)sizeof(struct i596_dma),
1112 &dma->scb));
1113
1114 return 0;
1115 }
1116
1117 #ifdef CONFIG_NET_POLL_CONTROLLER
1118 static void i596_poll_controller(struct net_device *dev)
1119 {
1120 disable_irq(dev->irq);
1121 i596_interrupt(dev->irq, dev);
1122 enable_irq(dev->irq);
1123 }
1124 #endif
1125
1126 static irqreturn_t i596_interrupt(int irq, void *dev_id)
1127 {
1128 struct net_device *dev = dev_id;
1129 struct i596_private *lp;
1130 struct i596_dma *dma;
1131 unsigned short status, ack_cmd = 0;
1132
1133 if (dev == NULL) {
1134 printk(KERN_WARNING "%s: irq %d for unknown device.\n",
1135 __FUNCTION__, irq);
1136 return IRQ_NONE;
1137 }
1138
1139 lp = netdev_priv(dev);
1140 dma = lp->dma;
1141
1142 spin_lock (&lp->lock);
1143
1144 wait_cmd(dev, dma, 100, "i596 interrupt, timeout");
1145 status = SWAP16(dma->scb.status);
1146
1147 DEB(DEB_INTS, printk(KERN_DEBUG
1148 "%s: i596 interrupt, IRQ %d, status %4.4x.\n",
1149 dev->name, irq, status));
1150
1151 ack_cmd = status & 0xf000;
1152
1153 if (!ack_cmd) {
1154 DEB(DEB_ERRORS, printk(KERN_DEBUG
1155 "%s: interrupt with no events\n",
1156 dev->name));
1157 spin_unlock (&lp->lock);
1158 return IRQ_NONE;
1159 }
1160
1161 if ((status & 0x8000) || (status & 0x2000)) {
1162 struct i596_cmd *ptr;
1163
1164 if ((status & 0x8000))
1165 DEB(DEB_INTS,
1166 printk(KERN_DEBUG
1167 "%s: i596 interrupt completed command.\n",
1168 dev->name));
1169 if ((status & 0x2000))
1170 DEB(DEB_INTS,
1171 printk(KERN_DEBUG
1172 "%s: i596 interrupt command unit inactive %x.\n",
1173 dev->name, status & 0x0700));
1174
1175 while (lp->cmd_head != NULL) {
1176 DMA_INV(dev, lp->cmd_head, sizeof(struct i596_cmd));
1177 if (!(lp->cmd_head->status & SWAP16(STAT_C)))
1178 break;
1179
1180 ptr = lp->cmd_head;
1181
1182 DEB(DEB_STATUS,
1183 printk(KERN_DEBUG
1184 "cmd_head->status = %04x, ->command = %04x\n",
1185 SWAP16(lp->cmd_head->status),
1186 SWAP16(lp->cmd_head->command)));
1187 lp->cmd_head = ptr->v_next;
1188 lp->cmd_backlog--;
1189
1190 switch (SWAP16(ptr->command) & 0x7) {
1191 case CmdTx:
1192 {
1193 struct tx_cmd *tx_cmd = (struct tx_cmd *) ptr;
1194 struct sk_buff *skb = tx_cmd->skb;
1195
1196 if (ptr->status & SWAP16(STAT_OK)) {
1197 DEB(DEB_TXADDR,
1198 print_eth(skb->data, "tx-done"));
1199 } else {
1200 lp->stats.tx_errors++;
1201 if (ptr->status & SWAP16(0x0020))
1202 lp->stats.collisions++;
1203 if (!(ptr->status & SWAP16(0x0040)))
1204 lp->stats.tx_heartbeat_errors++;
1205 if (ptr->status & SWAP16(0x0400))
1206 lp->stats.tx_carrier_errors++;
1207 if (ptr->status & SWAP16(0x0800))
1208 lp->stats.collisions++;
1209 if (ptr->status & SWAP16(0x1000))
1210 lp->stats.tx_aborted_errors++;
1211 }
1212 dma_unmap_single(dev->dev.parent,
1213 tx_cmd->dma_addr,
1214 skb->len, DMA_TO_DEVICE);
1215 dev_kfree_skb_irq(skb);
1216
1217 tx_cmd->cmd.command = 0; /* Mark free */
1218 break;
1219 }
1220 case CmdTDR:
1221 {
1222 unsigned short status = SWAP16(((struct tdr_cmd *)ptr)->status);
1223
1224 if (status & 0x8000) {
1225 DEB(DEB_ANY,
1226 printk(KERN_DEBUG "%s: link ok.\n",
1227 dev->name));
1228 } else {
1229 if (status & 0x4000)
1230 printk(KERN_ERR
1231 "%s: Transceiver problem.\n",
1232 dev->name);
1233 if (status & 0x2000)
1234 printk(KERN_ERR
1235 "%s: Termination problem.\n",
1236 dev->name);
1237 if (status & 0x1000)
1238 printk(KERN_ERR
1239 "%s: Short circuit.\n",
1240 dev->name);
1241
1242 DEB(DEB_TDR,
1243 printk(KERN_DEBUG "%s: Time %d.\n",
1244 dev->name, status & 0x07ff));
1245 }
1246 break;
1247 }
1248 case CmdConfigure:
1249 /*
1250 * Zap command so set_multicast_list() know
1251 * it is free
1252 */
1253 ptr->command = 0;
1254 break;
1255 }
1256 ptr->v_next = NULL;
1257 ptr->b_next = I596_NULL;
1258 DMA_WBACK(dev, ptr, sizeof(struct i596_cmd));
1259 lp->last_cmd = jiffies;
1260 }
1261
1262 /* This mess is arranging that only the last of any outstanding
1263 * commands has the interrupt bit set. Should probably really
1264 * only add to the cmd queue when the CU is stopped.
1265 */
1266 ptr = lp->cmd_head;
1267 while ((ptr != NULL) && (ptr != lp->cmd_tail)) {
1268 struct i596_cmd *prev = ptr;
1269
1270 ptr->command &= SWAP16(0x1fff);
1271 ptr = ptr->v_next;
1272 DMA_WBACK_INV(dev, prev, sizeof(struct i596_cmd));
1273 }
1274
1275 if (lp->cmd_head != NULL)
1276 ack_cmd |= CUC_START;
1277 dma->scb.cmd = SWAP32(virt_to_dma(lp, &lp->cmd_head->status));
1278 DMA_WBACK_INV(dev, &dma->scb, sizeof(struct i596_scb));
1279 }
1280 if ((status & 0x1000) || (status & 0x4000)) {
1281 if ((status & 0x4000))
1282 DEB(DEB_INTS,
1283 printk(KERN_DEBUG
1284 "%s: i596 interrupt received a frame.\n",
1285 dev->name));
1286 i596_rx(dev);
1287 /* Only RX_START if stopped - RGH 07-07-96 */
1288 if (status & 0x1000) {
1289 if (netif_running(dev)) {
1290 DEB(DEB_ERRORS,
1291 printk(KERN_DEBUG
1292 "%s: i596 interrupt receive unit inactive, status 0x%x\n",
1293 dev->name, status));
1294 ack_cmd |= RX_START;
1295 lp->stats.rx_errors++;
1296 lp->stats.rx_fifo_errors++;
1297 rebuild_rx_bufs(dev);
1298 }
1299 }
1300 }
1301 wait_cmd(dev, dma, 100, "i596 interrupt, timeout");
1302 dma->scb.command = SWAP16(ack_cmd);
1303 DMA_WBACK(dev, &dma->scb, sizeof(struct i596_scb));
1304
1305 /* DANGER: I suspect that some kind of interrupt
1306 acknowledgement aside from acking the 82596 might be needed
1307 here... but it's running acceptably without */
1308
1309 ca(dev);
1310
1311 wait_cmd(dev, dma, 100, "i596 interrupt, exit timeout");
1312 DEB(DEB_INTS, printk(KERN_DEBUG "%s: exiting interrupt.\n", dev->name));
1313
1314 spin_unlock (&lp->lock);
1315 return IRQ_HANDLED;
1316 }
1317
1318 static int i596_close(struct net_device *dev)
1319 {
1320 struct i596_private *lp = netdev_priv(dev);
1321 unsigned long flags;
1322
1323 netif_stop_queue(dev);
1324
1325 DEB(DEB_INIT,
1326 printk(KERN_DEBUG
1327 "%s: Shutting down ethercard, status was %4.4x.\n",
1328 dev->name, SWAP16(lp->dma->scb.status)));
1329
1330 spin_lock_irqsave(&lp->lock, flags);
1331
1332 wait_cmd(dev, lp->dma, 100, "close1 timed out");
1333 lp->dma->scb.command = SWAP16(CUC_ABORT | RX_ABORT);
1334 DMA_WBACK(dev, &lp->dma->scb, sizeof(struct i596_scb));
1335
1336 ca(dev);
1337
1338 wait_cmd(dev, lp->dma, 100, "close2 timed out");
1339 spin_unlock_irqrestore(&lp->lock, flags);
1340 DEB(DEB_STRUCT, i596_display_data(dev));
1341 i596_cleanup_cmd(dev, lp);
1342
1343 free_irq(dev->irq, dev);
1344 remove_rx_bufs(dev);
1345
1346 return 0;
1347 }
1348
1349 static struct net_device_stats *i596_get_stats(struct net_device *dev)
1350 {
1351 struct i596_private *lp = netdev_priv(dev);
1352
1353 return &lp->stats;
1354 }
1355
1356 /*
1357 * Set or clear the multicast filter for this adaptor.
1358 */
1359
1360 static void set_multicast_list(struct net_device *dev)
1361 {
1362 struct i596_private *lp = netdev_priv(dev);
1363 struct i596_dma *dma = lp->dma;
1364 int config = 0, cnt;
1365
1366 DEB(DEB_MULTI,
1367 printk(KERN_DEBUG
1368 "%s: set multicast list, %d entries, promisc %s, allmulti %s\n",
1369 dev->name, dev->mc_count,
1370 dev->flags & IFF_PROMISC ? "ON" : "OFF",
1371 dev->flags & IFF_ALLMULTI ? "ON" : "OFF"));
1372
1373 if ((dev->flags & IFF_PROMISC) &&
1374 !(dma->cf_cmd.i596_config[8] & 0x01)) {
1375 dma->cf_cmd.i596_config[8] |= 0x01;
1376 config = 1;
1377 }
1378 if (!(dev->flags & IFF_PROMISC) &&
1379 (dma->cf_cmd.i596_config[8] & 0x01)) {
1380 dma->cf_cmd.i596_config[8] &= ~0x01;
1381 config = 1;
1382 }
1383 if ((dev->flags & IFF_ALLMULTI) &&
1384 (dma->cf_cmd.i596_config[11] & 0x20)) {
1385 dma->cf_cmd.i596_config[11] &= ~0x20;
1386 config = 1;
1387 }
1388 if (!(dev->flags & IFF_ALLMULTI) &&
1389 !(dma->cf_cmd.i596_config[11] & 0x20)) {
1390 dma->cf_cmd.i596_config[11] |= 0x20;
1391 config = 1;
1392 }
1393 if (config) {
1394 if (dma->cf_cmd.cmd.command)
1395 printk(KERN_INFO
1396 "%s: config change request already queued\n",
1397 dev->name);
1398 else {
1399 dma->cf_cmd.cmd.command = SWAP16(CmdConfigure);
1400 DMA_WBACK_INV(dev, &dma->cf_cmd, sizeof(struct cf_cmd));
1401 i596_add_cmd(dev, &dma->cf_cmd.cmd);
1402 }
1403 }
1404
1405 cnt = dev->mc_count;
1406 if (cnt > MAX_MC_CNT) {
1407 cnt = MAX_MC_CNT;
1408 printk(KERN_NOTICE "%s: Only %d multicast addresses supported",
1409 dev->name, cnt);
1410 }
1411
1412 if (dev->mc_count > 0) {
1413 struct dev_mc_list *dmi;
1414 unsigned char *cp;
1415 struct mc_cmd *cmd;
1416
1417 cmd = &dma->mc_cmd;
1418 cmd->cmd.command = SWAP16(CmdMulticastList);
1419 cmd->mc_cnt = SWAP16(dev->mc_count * 6);
1420 cp = cmd->mc_addrs;
1421 for (dmi = dev->mc_list;
1422 cnt && dmi != NULL;
1423 dmi = dmi->next, cnt--, cp += 6) {
1424 memcpy(cp, dmi->dmi_addr, 6);
1425 if (i596_debug > 1)
1426 DEB(DEB_MULTI,
1427 printk(KERN_DEBUG
1428 "%s: Adding address %02x:%02x:%02x:%02x:%02x:%02x\n",
1429 dev->name, cp[0], cp[1], cp[2], cp[3], cp[4], cp[5]));
1430 }
1431 DMA_WBACK_INV(dev, &dma->mc_cmd, sizeof(struct mc_cmd));
1432 i596_add_cmd(dev, &cmd->cmd);
1433 }
1434 }
Support for the Chinese Samsung S3C2440 based development boards