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e1000: Fix unecessary delay for 82573 controllers
[linux-2.6/zen-sources.git] / drivers / net / lasi_82596.c
blobf7b7238d8352ed09a1652721aa8848282acdd617
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/ptrace.h>
75 #include <linux/errno.h>
76 #include <linux/ioport.h>
77 #include <linux/slab.h>
78 #include <linux/interrupt.h>
79 #include <linux/delay.h>
80 #include <linux/netdevice.h>
81 #include <linux/etherdevice.h>
82 #include <linux/skbuff.h>
83 #include <linux/init.h>
84 #include <linux/pci.h>
85 #include <linux/types.h>
86 #include <linux/bitops.h>
87
88 #include <asm/io.h>
89 #include <asm/pgtable.h>
90 #include <asm/irq.h>
91 #include <asm/pdc.h>
92 #include <asm/cache.h>
93 #include <asm/parisc-device.h>
94
95 #define LASI_82596_DRIVER_VERSION "LASI 82596 driver - Revision: 1.30"
96
97 /* DEBUG flags
98 */
99
100 #define DEB_INIT 0x0001
101 #define DEB_PROBE 0x0002
102 #define DEB_SERIOUS 0x0004
103 #define DEB_ERRORS 0x0008
104 #define DEB_MULTI 0x0010
105 #define DEB_TDR 0x0020
106 #define DEB_OPEN 0x0040
107 #define DEB_RESET 0x0080
108 #define DEB_ADDCMD 0x0100
109 #define DEB_STATUS 0x0200
110 #define DEB_STARTTX 0x0400
111 #define DEB_RXADDR 0x0800
112 #define DEB_TXADDR 0x1000
113 #define DEB_RXFRAME 0x2000
114 #define DEB_INTS 0x4000
115 #define DEB_STRUCT 0x8000
116 #define DEB_ANY 0xffff
117
118
119 #define DEB(x,y) if (i596_debug & (x)) { y; }
120
121
122 #define CHECK_WBACK(addr,len) \
123 do { dma_cache_sync((void *)addr, len, DMA_TO_DEVICE); } while (0)
124
125 #define CHECK_INV(addr,len) \
126 do { dma_cache_sync((void *)addr, len, DMA_FROM_DEVICE); } while(0)
127
128 #define CHECK_WBACK_INV(addr,len) \
129 do { dma_cache_sync((void *)addr, len, DMA_BIDIRECTIONAL); } while (0)
130
131
132 #define PA_I82596_RESET 0 /* Offsets relative to LASI-LAN-Addr.*/
133 #define PA_CPU_PORT_L_ACCESS 4
134 #define PA_CHANNEL_ATTENTION 8
135
136
137 /*
138 * Define various macros for Channel Attention, word swapping etc., dependent
139 * on architecture. MVME and BVME are 680x0 based, otherwise it is Intel.
140 */
141
142 #ifdef __BIG_ENDIAN
143 #define WSWAPrfd(x) (((u32)(x)<<16) | ((((u32)(x)))>>16))
144 #define WSWAPrbd(x) (((u32)(x)<<16) | ((((u32)(x)))>>16))
145 #define WSWAPiscp(x) (((u32)(x)<<16) | ((((u32)(x)))>>16))
146 #define WSWAPscb(x) (((u32)(x)<<16) | ((((u32)(x)))>>16))
147 #define WSWAPcmd(x) (((u32)(x)<<16) | ((((u32)(x)))>>16))
148 #define WSWAPtbd(x) (((u32)(x)<<16) | ((((u32)(x)))>>16))
149 #define WSWAPchar(x) (((u32)(x)<<16) | ((((u32)(x)))>>16))
150 #define ISCP_BUSY 0x00010000
151 #define MACH_IS_APRICOT 0
152 #else
153 #define WSWAPrfd(x) ((struct i596_rfd *)(x))
154 #define WSWAPrbd(x) ((struct i596_rbd *)(x))
155 #define WSWAPiscp(x) ((struct i596_iscp *)(x))
156 #define WSWAPscb(x) ((struct i596_scb *)(x))
157 #define WSWAPcmd(x) ((struct i596_cmd *)(x))
158 #define WSWAPtbd(x) ((struct i596_tbd *)(x))
159 #define WSWAPchar(x) ((char *)(x))
160 #define ISCP_BUSY 0x0001
161 #define MACH_IS_APRICOT 1
162 #endif
163
164 /*
165 * The MPU_PORT command allows direct access to the 82596. With PORT access
166 * the following commands are available (p5-18). The 32-bit port command
167 * must be word-swapped with the most significant word written first.
168 * This only applies to VME boards.
169 */
170 #define PORT_RESET 0x00 /* reset 82596 */
171 #define PORT_SELFTEST 0x01 /* selftest */
172 #define PORT_ALTSCP 0x02 /* alternate SCB address */
173 #define PORT_ALTDUMP 0x03 /* Alternate DUMP address */
174
175 static int i596_debug = (DEB_SERIOUS|DEB_PROBE);
176
177 MODULE_AUTHOR("Richard Hirst");
178 MODULE_DESCRIPTION("i82596 driver");
179 MODULE_LICENSE("GPL");
180 MODULE_PARM(i596_debug, "i");
181 MODULE_PARM_DESC(i596_debug, "lasi_82596 debug mask");
182
183 /* Copy frames shorter than rx_copybreak, otherwise pass on up in
184 * a full sized sk_buff. Value of 100 stolen from tulip.c (!alpha).
185 */
186 static int rx_copybreak = 100;
187
188 #define MAX_DRIVERS 4 /* max count of drivers */
189
190 #define PKT_BUF_SZ 1536
191 #define MAX_MC_CNT 64
192
193 #define I596_NULL ((u32)0xffffffff)
194
195 #define CMD_EOL 0x8000 /* The last command of the list, stop. */
196 #define CMD_SUSP 0x4000 /* Suspend after doing cmd. */
197 #define CMD_INTR 0x2000 /* Interrupt after doing cmd. */
198
199 #define CMD_FLEX 0x0008 /* Enable flexible memory model */
200
201 enum commands {
202 CmdNOp = 0, CmdSASetup = 1, CmdConfigure = 2, CmdMulticastList = 3,
203 CmdTx = 4, CmdTDR = 5, CmdDump = 6, CmdDiagnose = 7
204 };
205
206 #define STAT_C 0x8000 /* Set to 0 after execution */
207 #define STAT_B 0x4000 /* Command being executed */
208 #define STAT_OK 0x2000 /* Command executed ok */
209 #define STAT_A 0x1000 /* Command aborted */
210
211 #define CUC_START 0x0100
212 #define CUC_RESUME 0x0200
213 #define CUC_SUSPEND 0x0300
214 #define CUC_ABORT 0x0400
215 #define RX_START 0x0010
216 #define RX_RESUME 0x0020
217 #define RX_SUSPEND 0x0030
218 #define RX_ABORT 0x0040
219
220 #define TX_TIMEOUT 5
221
222 #define OPT_SWAP_PORT 0x0001 /* Need to wordswp on the MPU port */
223
224
225 struct i596_reg {
226 unsigned short porthi;
227 unsigned short portlo;
228 u32 ca;
229 };
230
231 #define EOF 0x8000
232 #define SIZE_MASK 0x3fff
233
234 struct i596_tbd {
235 unsigned short size;
236 unsigned short pad;
237 dma_addr_t next;
238 dma_addr_t data;
239 u32 cache_pad[5]; /* Total 32 bytes... */
240 };
241
242 /* The command structure has two 'next' pointers; v_next is the address of
243 * the next command as seen by the CPU, b_next is the address of the next
244 * command as seen by the 82596. The b_next pointer, as used by the 82596
245 * always references the status field of the next command, rather than the
246 * v_next field, because the 82596 is unaware of v_next. It may seem more
247 * logical to put v_next at the end of the structure, but we cannot do that
248 * because the 82596 expects other fields to be there, depending on command
249 * type.
250 */
251
252 struct i596_cmd {
253 struct i596_cmd *v_next; /* Address from CPUs viewpoint */
254 unsigned short status;
255 unsigned short command;
256 dma_addr_t b_next; /* Address from i596 viewpoint */
257 };
258
259 struct tx_cmd {
260 struct i596_cmd cmd;
261 dma_addr_t tbd;
262 unsigned short size;
263 unsigned short pad;
264 struct sk_buff *skb; /* So we can free it after tx */
265 dma_addr_t dma_addr;
266 #ifdef __LP64__
267 u32 cache_pad[6]; /* Total 64 bytes... */
268 #else
269 u32 cache_pad[1]; /* Total 32 bytes... */
270 #endif
271 };
272
273 struct tdr_cmd {
274 struct i596_cmd cmd;
275 unsigned short status;
276 unsigned short pad;
277 };
278
279 struct mc_cmd {
280 struct i596_cmd cmd;
281 short mc_cnt;
282 char mc_addrs[MAX_MC_CNT*6];
283 };
284
285 struct sa_cmd {
286 struct i596_cmd cmd;
287 char eth_addr[8];
288 };
289
290 struct cf_cmd {
291 struct i596_cmd cmd;
292 char i596_config[16];
293 };
294
295 struct i596_rfd {
296 unsigned short stat;
297 unsigned short cmd;
298 dma_addr_t b_next; /* Address from i596 viewpoint */
299 dma_addr_t rbd;
300 unsigned short count;
301 unsigned short size;
302 struct i596_rfd *v_next; /* Address from CPUs viewpoint */
303 struct i596_rfd *v_prev;
304 #ifndef __LP64__
305 u32 cache_pad[2]; /* Total 32 bytes... */
306 #endif
307 };
308
309 struct i596_rbd {
310 /* hardware data */
311 unsigned short count;
312 unsigned short zero1;
313 dma_addr_t b_next;
314 dma_addr_t b_data; /* Address from i596 viewpoint */
315 unsigned short size;
316 unsigned short zero2;
317 /* driver data */
318 struct sk_buff *skb;
319 struct i596_rbd *v_next;
320 dma_addr_t b_addr; /* This rbd addr from i596 view */
321 unsigned char *v_data; /* Address from CPUs viewpoint */
322 /* Total 32 bytes... */
323 #ifdef __LP64__
324 u32 cache_pad[4];
325 #endif
326 };
327
328 /* These values as chosen so struct i596_private fits in one page... */
329
330 #define TX_RING_SIZE 32
331 #define RX_RING_SIZE 16
332
333 struct i596_scb {
334 unsigned short status;
335 unsigned short command;
336 dma_addr_t cmd;
337 dma_addr_t rfd;
338 u32 crc_err;
339 u32 align_err;
340 u32 resource_err;
341 u32 over_err;
342 u32 rcvdt_err;
343 u32 short_err;
344 unsigned short t_on;
345 unsigned short t_off;
346 };
347
348 struct i596_iscp {
349 u32 stat;
350 dma_addr_t scb;
351 };
352
353 struct i596_scp {
354 u32 sysbus;
355 u32 pad;
356 dma_addr_t iscp;
357 };
358
359 struct i596_private {
360 volatile struct i596_scp scp __attribute__((aligned(32)));
361 volatile struct i596_iscp iscp __attribute__((aligned(32)));
362 volatile struct i596_scb scb __attribute__((aligned(32)));
363 struct sa_cmd sa_cmd __attribute__((aligned(32)));
364 struct cf_cmd cf_cmd __attribute__((aligned(32)));
365 struct tdr_cmd tdr_cmd __attribute__((aligned(32)));
366 struct mc_cmd mc_cmd __attribute__((aligned(32)));
367 struct i596_rfd rfds[RX_RING_SIZE] __attribute__((aligned(32)));
368 struct i596_rbd rbds[RX_RING_SIZE] __attribute__((aligned(32)));
369 struct tx_cmd tx_cmds[TX_RING_SIZE] __attribute__((aligned(32)));
370 struct i596_tbd tbds[TX_RING_SIZE] __attribute__((aligned(32)));
371 u32 stat;
372 int last_restart;
373 struct i596_rfd *rfd_head;
374 struct i596_rbd *rbd_head;
375 struct i596_cmd *cmd_tail;
376 struct i596_cmd *cmd_head;
377 int cmd_backlog;
378 u32 last_cmd;
379 struct net_device_stats stats;
380 int next_tx_cmd;
381 int options;
382 spinlock_t lock;
383 dma_addr_t dma_addr;
384 struct device *dev;
385 };
386
387 static char init_setup[] =
388 {
389 0x8E, /* length, prefetch on */
390 0xC8, /* fifo to 8, monitor off */
391 0x80, /* don't save bad frames */
392 0x2E, /* No source address insertion, 8 byte preamble */
393 0x00, /* priority and backoff defaults */
394 0x60, /* interframe spacing */
395 0x00, /* slot time LSB */
396 0xf2, /* slot time and retries */
397 0x00, /* promiscuous mode */
398 0x00, /* collision detect */
399 0x40, /* minimum frame length */
400 0xff,
401 0x00,
402 0x7f /* *multi IA */ };
403
404 static int i596_open(struct net_device *dev);
405 static int i596_start_xmit(struct sk_buff *skb, struct net_device *dev);
406 static irqreturn_t i596_interrupt(int irq, void *dev_id, struct pt_regs *regs);
407 static int i596_close(struct net_device *dev);
408 static struct net_device_stats *i596_get_stats(struct net_device *dev);
409 static void i596_add_cmd(struct net_device *dev, struct i596_cmd *cmd);
410 static void i596_tx_timeout (struct net_device *dev);
411 static void print_eth(unsigned char *buf, char *str);
412 static void set_multicast_list(struct net_device *dev);
413
414 static int rx_ring_size = RX_RING_SIZE;
415 static int ticks_limit = 100;
416 static int max_cmd_backlog = TX_RING_SIZE-1;
417
418 #ifdef CONFIG_NET_POLL_CONTROLLER
419 static void i596_poll_controller(struct net_device *dev);
420 #endif
421
422
423 static inline void CA(struct net_device *dev)
424 {
425 gsc_writel(0, dev->base_addr + PA_CHANNEL_ATTENTION);
426 }
427
428
429 static inline void MPU_PORT(struct net_device *dev, int c, dma_addr_t x)
430 {
431 struct i596_private *lp = dev->priv;
432
433 u32 v = (u32) (c) | (u32) (x);
434 u16 a, b;
435
436 if (lp->options & OPT_SWAP_PORT) {
437 a = v >> 16;
438 b = v & 0xffff;
439 } else {
440 a = v & 0xffff;
441 b = v >> 16;
442 }
443
444 gsc_writel(a, dev->base_addr + PA_CPU_PORT_L_ACCESS);
445 udelay(1);
446 gsc_writel(b, dev->base_addr + PA_CPU_PORT_L_ACCESS);
447 }
448
449
450 static inline int wait_istat(struct net_device *dev, struct i596_private *lp, int delcnt, char *str)
451 {
452 CHECK_INV(&(lp->iscp), sizeof(struct i596_iscp));
453 while (--delcnt && lp->iscp.stat) {
454 udelay(10);
455 CHECK_INV(&(lp->iscp), sizeof(struct i596_iscp));
456 }
457 if (!delcnt) {
458 printk("%s: %s, iscp.stat %04x, didn't clear\n",
459 dev->name, str, lp->iscp.stat);
460 return -1;
461 }
462 else
463 return 0;
464 }
465
466
467 static inline int wait_cmd(struct net_device *dev, struct i596_private *lp, int delcnt, char *str)
468 {
469 CHECK_INV(&(lp->scb), sizeof(struct i596_scb));
470 while (--delcnt && lp->scb.command) {
471 udelay(10);
472 CHECK_INV(&(lp->scb), sizeof(struct i596_scb));
473 }
474 if (!delcnt) {
475 printk("%s: %s, status %4.4x, cmd %4.4x.\n",
476 dev->name, str, lp->scb.status, lp->scb.command);
477 return -1;
478 }
479 else
480 return 0;
481 }
482
483
484 static void i596_display_data(struct net_device *dev)
485 {
486 struct i596_private *lp = dev->priv;
487 struct i596_cmd *cmd;
488 struct i596_rfd *rfd;
489 struct i596_rbd *rbd;
490
491 printk("lp and scp at %p, .sysbus = %08x, .iscp = %08x\n",
492 &lp->scp, lp->scp.sysbus, lp->scp.iscp);
493 printk("iscp at %p, iscp.stat = %08x, .scb = %08x\n",
494 &lp->iscp, lp->iscp.stat, lp->iscp.scb);
495 printk("scb at %p, scb.status = %04x, .command = %04x,"
496 " .cmd = %08x, .rfd = %08x\n",
497 &lp->scb, lp->scb.status, lp->scb.command,
498 lp->scb.cmd, lp->scb.rfd);
499 printk(" errors: crc %x, align %x, resource %x,"
500 " over %x, rcvdt %x, short %x\n",
501 lp->scb.crc_err, lp->scb.align_err, lp->scb.resource_err,
502 lp->scb.over_err, lp->scb.rcvdt_err, lp->scb.short_err);
503 cmd = lp->cmd_head;
504 while (cmd != NULL) {
505 printk("cmd at %p, .status = %04x, .command = %04x, .b_next = %08x\n",
506 cmd, cmd->status, cmd->command, cmd->b_next);
507 cmd = cmd->v_next;
508 }
509 rfd = lp->rfd_head;
510 printk("rfd_head = %p\n", rfd);
511 do {
512 printk(" %p .stat %04x, .cmd %04x, b_next %08x, rbd %08x,"
513 " count %04x\n",
514 rfd, rfd->stat, rfd->cmd, rfd->b_next, rfd->rbd,
515 rfd->count);
516 rfd = rfd->v_next;
517 } while (rfd != lp->rfd_head);
518 rbd = lp->rbd_head;
519 printk("rbd_head = %p\n", rbd);
520 do {
521 printk(" %p .count %04x, b_next %08x, b_data %08x, size %04x\n",
522 rbd, rbd->count, rbd->b_next, rbd->b_data, rbd->size);
523 rbd = rbd->v_next;
524 } while (rbd != lp->rbd_head);
525 CHECK_INV(lp, sizeof(struct i596_private));
526 }
527
528
529 #if defined(ENABLE_MVME16x_NET) || defined(ENABLE_BVME6000_NET)
530 static void i596_error(int irq, void *dev_id, struct pt_regs *regs)
531 {
532 struct net_device *dev = dev_id;
533 volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000;
534
535 pcc2[0x28] = 1;
536 pcc2[0x2b] = 0x1d;
537 printk("%s: Error interrupt\n", dev->name);
538 i596_display_data(dev);
539 }
540 #endif
541
542 #define virt_to_dma(lp,v) ((lp)->dma_addr + (dma_addr_t)((unsigned long)(v)-(unsigned long)(lp)))
543
544 static inline void init_rx_bufs(struct net_device *dev)
545 {
546 struct i596_private *lp = dev->priv;
547 int i;
548 struct i596_rfd *rfd;
549 struct i596_rbd *rbd;
550
551 /* First build the Receive Buffer Descriptor List */
552
553 for (i = 0, rbd = lp->rbds; i < rx_ring_size; i++, rbd++) {
554 dma_addr_t dma_addr;
555 struct sk_buff *skb = dev_alloc_skb(PKT_BUF_SZ + 4);
556
557 if (skb == NULL)
558 panic("%s: alloc_skb() failed", __FILE__);
559 skb_reserve(skb, 2);
560 dma_addr = dma_map_single(lp->dev, skb->data,PKT_BUF_SZ,
561 DMA_FROM_DEVICE);
562 skb->dev = dev;
563 rbd->v_next = rbd+1;
564 rbd->b_next = WSWAPrbd(virt_to_dma(lp,rbd+1));
565 rbd->b_addr = WSWAPrbd(virt_to_dma(lp,rbd));
566 rbd->skb = skb;
567 rbd->v_data = skb->data;
568 rbd->b_data = WSWAPchar(dma_addr);
569 rbd->size = PKT_BUF_SZ;
570 }
571 lp->rbd_head = lp->rbds;
572 rbd = lp->rbds + rx_ring_size - 1;
573 rbd->v_next = lp->rbds;
574 rbd->b_next = WSWAPrbd(virt_to_dma(lp,lp->rbds));
575
576 /* Now build the Receive Frame Descriptor List */
577
578 for (i = 0, rfd = lp->rfds; i < rx_ring_size; i++, rfd++) {
579 rfd->rbd = I596_NULL;
580 rfd->v_next = rfd+1;
581 rfd->v_prev = rfd-1;
582 rfd->b_next = WSWAPrfd(virt_to_dma(lp,rfd+1));
583 rfd->cmd = CMD_FLEX;
584 }
585 lp->rfd_head = lp->rfds;
586 lp->scb.rfd = WSWAPrfd(virt_to_dma(lp,lp->rfds));
587 rfd = lp->rfds;
588 rfd->rbd = WSWAPrbd(virt_to_dma(lp,lp->rbd_head));
589 rfd->v_prev = lp->rfds + rx_ring_size - 1;
590 rfd = lp->rfds + rx_ring_size - 1;
591 rfd->v_next = lp->rfds;
592 rfd->b_next = WSWAPrfd(virt_to_dma(lp,lp->rfds));
593 rfd->cmd = CMD_EOL|CMD_FLEX;
594
595 CHECK_WBACK_INV(lp, sizeof(struct i596_private));
596 }
597
598 static inline void remove_rx_bufs(struct net_device *dev)
599 {
600 struct i596_private *lp = dev->priv;
601 struct i596_rbd *rbd;
602 int i;
603
604 for (i = 0, rbd = lp->rbds; i < rx_ring_size; i++, rbd++) {
605 if (rbd->skb == NULL)
606 break;
607 dma_unmap_single(lp->dev,
608 (dma_addr_t)WSWAPchar(rbd->b_data),
609 PKT_BUF_SZ, DMA_FROM_DEVICE);
610 dev_kfree_skb(rbd->skb);
611 }
612 }
613
614
615 static void rebuild_rx_bufs(struct net_device *dev)
616 {
617 struct i596_private *lp = dev->priv;
618 int i;
619
620 /* Ensure rx frame/buffer descriptors are tidy */
621
622 for (i = 0; i < rx_ring_size; i++) {
623 lp->rfds[i].rbd = I596_NULL;
624 lp->rfds[i].cmd = CMD_FLEX;
625 }
626 lp->rfds[rx_ring_size-1].cmd = CMD_EOL|CMD_FLEX;
627 lp->rfd_head = lp->rfds;
628 lp->scb.rfd = WSWAPrfd(virt_to_dma(lp,lp->rfds));
629 lp->rbd_head = lp->rbds;
630 lp->rfds[0].rbd = WSWAPrbd(virt_to_dma(lp,lp->rbds));
631
632 CHECK_WBACK_INV(lp, sizeof(struct i596_private));
633 }
634
635
636 static int init_i596_mem(struct net_device *dev)
637 {
638 struct i596_private *lp = dev->priv;
639 unsigned long flags;
640
641 disable_irq(dev->irq); /* disable IRQs from LAN */
642 DEB(DEB_INIT,
643 printk("RESET 82596 port: %lx (with IRQ %d disabled)\n",
644 (dev->base_addr + PA_I82596_RESET),
645 dev->irq));
646
647 gsc_writel(0, (dev->base_addr + PA_I82596_RESET)); /* Hard Reset */
648 udelay(100); /* Wait 100us - seems to help */
649
650 /* change the scp address */
651
652 lp->last_cmd = jiffies;
653
654
655 lp->scp.sysbus = 0x0000006c;
656 lp->scp.iscp = WSWAPiscp(virt_to_dma(lp,&(lp->iscp)));
657 lp->iscp.scb = WSWAPscb(virt_to_dma(lp,&(lp->scb)));
658 lp->iscp.stat = ISCP_BUSY;
659 lp->cmd_backlog = 0;
660
661 lp->cmd_head = NULL;
662 lp->scb.cmd = I596_NULL;
663
664 DEB(DEB_INIT, printk("%s: starting i82596.\n", dev->name));
665
666 CHECK_WBACK(&(lp->scp), sizeof(struct i596_scp));
667 CHECK_WBACK(&(lp->iscp), sizeof(struct i596_iscp));
668
669 MPU_PORT(dev, PORT_ALTSCP, virt_to_dma(lp,&lp->scp));
670
671 CA(dev);
672
673 if (wait_istat(dev, lp, 1000, "initialization timed out"))
674 goto failed;
675 DEB(DEB_INIT, printk("%s: i82596 initialization successful\n", dev->name));
676
677 /* Ensure rx frame/buffer descriptors are tidy */
678 rebuild_rx_bufs(dev);
679
680 lp->scb.command = 0;
681 CHECK_WBACK(&(lp->scb), sizeof(struct i596_scb));
682
683 enable_irq(dev->irq); /* enable IRQs from LAN */
684
685 DEB(DEB_INIT, printk("%s: queuing CmdConfigure\n", dev->name));
686 memcpy(lp->cf_cmd.i596_config, init_setup, 14);
687 lp->cf_cmd.cmd.command = CmdConfigure;
688 CHECK_WBACK(&(lp->cf_cmd), sizeof(struct cf_cmd));
689 i596_add_cmd(dev, &lp->cf_cmd.cmd);
690
691 DEB(DEB_INIT, printk("%s: queuing CmdSASetup\n", dev->name));
692 memcpy(lp->sa_cmd.eth_addr, dev->dev_addr, 6);
693 lp->sa_cmd.cmd.command = CmdSASetup;
694 CHECK_WBACK(&(lp->sa_cmd), sizeof(struct sa_cmd));
695 i596_add_cmd(dev, &lp->sa_cmd.cmd);
696
697 DEB(DEB_INIT, printk("%s: queuing CmdTDR\n", dev->name));
698 lp->tdr_cmd.cmd.command = CmdTDR;
699 CHECK_WBACK(&(lp->tdr_cmd), sizeof(struct tdr_cmd));
700 i596_add_cmd(dev, &lp->tdr_cmd.cmd);
701
702 spin_lock_irqsave (&lp->lock, flags);
703
704 if (wait_cmd(dev, lp, 1000, "timed out waiting to issue RX_START")) {
705 spin_unlock_irqrestore (&lp->lock, flags);
706 goto failed;
707 }
708 DEB(DEB_INIT, printk("%s: Issuing RX_START\n", dev->name));
709 lp->scb.command = RX_START;
710 lp->scb.rfd = WSWAPrfd(virt_to_dma(lp,lp->rfds));
711 CHECK_WBACK(&(lp->scb), sizeof(struct i596_scb));
712
713 CA(dev);
714
715 spin_unlock_irqrestore (&lp->lock, flags);
716
717 if (wait_cmd(dev, lp, 1000, "RX_START not processed"))
718 goto failed;
719 DEB(DEB_INIT, printk("%s: Receive unit started OK\n", dev->name));
720
721 return 0;
722
723 failed:
724 printk("%s: Failed to initialise 82596\n", dev->name);
725 MPU_PORT(dev, PORT_RESET, 0);
726 return -1;
727 }
728
729
730 static inline int i596_rx(struct net_device *dev)
731 {
732 struct i596_private *lp = dev->priv;
733 struct i596_rfd *rfd;
734 struct i596_rbd *rbd;
735 int frames = 0;
736
737 DEB(DEB_RXFRAME, printk("i596_rx(), rfd_head %p, rbd_head %p\n",
738 lp->rfd_head, lp->rbd_head));
739
740
741 rfd = lp->rfd_head; /* Ref next frame to check */
742
743 CHECK_INV(rfd, sizeof(struct i596_rfd));
744 while ((rfd->stat) & STAT_C) { /* Loop while complete frames */
745 if (rfd->rbd == I596_NULL)
746 rbd = NULL;
747 else if (rfd->rbd == lp->rbd_head->b_addr) {
748 rbd = lp->rbd_head;
749 CHECK_INV(rbd, sizeof(struct i596_rbd));
750 }
751 else {
752 printk("%s: rbd chain broken!\n", dev->name);
753 /* XXX Now what? */
754 rbd = NULL;
755 }
756 DEB(DEB_RXFRAME, printk(" rfd %p, rfd.rbd %08x, rfd.stat %04x\n",
757 rfd, rfd->rbd, rfd->stat));
758
759 if (rbd != NULL && ((rfd->stat) & STAT_OK)) {
760 /* a good frame */
761 int pkt_len = rbd->count & 0x3fff;
762 struct sk_buff *skb = rbd->skb;
763 int rx_in_place = 0;
764
765 DEB(DEB_RXADDR,print_eth(rbd->v_data, "received"));
766 frames++;
767
768 /* Check if the packet is long enough to just accept
769 * without copying to a properly sized skbuff.
770 */
771
772 if (pkt_len > rx_copybreak) {
773 struct sk_buff *newskb;
774 dma_addr_t dma_addr;
775
776 dma_unmap_single(lp->dev,(dma_addr_t)WSWAPchar(rbd->b_data), PKT_BUF_SZ, DMA_FROM_DEVICE);
777 /* Get fresh skbuff to replace filled one. */
778 newskb = dev_alloc_skb(PKT_BUF_SZ + 4);
779 if (newskb == NULL) {
780 skb = NULL; /* drop pkt */
781 goto memory_squeeze;
782 }
783 skb_reserve(newskb, 2);
784
785 /* Pass up the skb already on the Rx ring. */
786 skb_put(skb, pkt_len);
787 rx_in_place = 1;
788 rbd->skb = newskb;
789 newskb->dev = dev;
790 dma_addr = dma_map_single(lp->dev, newskb->data, PKT_BUF_SZ, DMA_FROM_DEVICE);
791 rbd->v_data = newskb->data;
792 rbd->b_data = WSWAPchar(dma_addr);
793 CHECK_WBACK_INV(rbd, sizeof(struct i596_rbd));
794 }
795 else
796 skb = dev_alloc_skb(pkt_len + 2);
797 memory_squeeze:
798 if (skb == NULL) {
799 /* XXX tulip.c can defer packets here!! */
800 printk("%s: i596_rx Memory squeeze, dropping packet.\n", dev->name);
801 lp->stats.rx_dropped++;
802 }
803 else {
804 skb->dev = dev;
805 if (!rx_in_place) {
806 /* 16 byte align the data fields */
807 dma_sync_single_for_cpu(lp->dev, (dma_addr_t)WSWAPchar(rbd->b_data), PKT_BUF_SZ, DMA_FROM_DEVICE);
808 skb_reserve(skb, 2);
809 memcpy(skb_put(skb,pkt_len), rbd->v_data, pkt_len);
810 dma_sync_single_for_device(lp->dev, (dma_addr_t)WSWAPchar(rbd->b_data), PKT_BUF_SZ, DMA_FROM_DEVICE);
811 }
812 skb->len = pkt_len;
813 skb->protocol=eth_type_trans(skb,dev);
814 netif_rx(skb);
815 dev->last_rx = jiffies;
816 lp->stats.rx_packets++;
817 lp->stats.rx_bytes+=pkt_len;
818 }
819 }
820 else {
821 DEB(DEB_ERRORS, printk("%s: Error, rfd.stat = 0x%04x\n",
822 dev->name, rfd->stat));
823 lp->stats.rx_errors++;
824 if ((rfd->stat) & 0x0001)
825 lp->stats.collisions++;
826 if ((rfd->stat) & 0x0080)
827 lp->stats.rx_length_errors++;
828 if ((rfd->stat) & 0x0100)
829 lp->stats.rx_over_errors++;
830 if ((rfd->stat) & 0x0200)
831 lp->stats.rx_fifo_errors++;
832 if ((rfd->stat) & 0x0400)
833 lp->stats.rx_frame_errors++;
834 if ((rfd->stat) & 0x0800)
835 lp->stats.rx_crc_errors++;
836 if ((rfd->stat) & 0x1000)
837 lp->stats.rx_length_errors++;
838 }
839
840 /* Clear the buffer descriptor count and EOF + F flags */
841
842 if (rbd != NULL && (rbd->count & 0x4000)) {
843 rbd->count = 0;
844 lp->rbd_head = rbd->v_next;
845 CHECK_WBACK_INV(rbd, sizeof(struct i596_rbd));
846 }
847
848 /* Tidy the frame descriptor, marking it as end of list */
849
850 rfd->rbd = I596_NULL;
851 rfd->stat = 0;
852 rfd->cmd = CMD_EOL|CMD_FLEX;
853 rfd->count = 0;
854
855 /* Remove end-of-list from old end descriptor */
856
857 rfd->v_prev->cmd = CMD_FLEX;
858
859 /* Update record of next frame descriptor to process */
860
861 lp->scb.rfd = rfd->b_next;
862 lp->rfd_head = rfd->v_next;
863 CHECK_WBACK_INV(rfd->v_prev, sizeof(struct i596_rfd));
864 CHECK_WBACK_INV(rfd, sizeof(struct i596_rfd));
865 rfd = lp->rfd_head;
866 CHECK_INV(rfd, sizeof(struct i596_rfd));
867 }
868
869 DEB(DEB_RXFRAME, printk("frames %d\n", frames));
870
871 return 0;
872 }
873
874
875 static inline void i596_cleanup_cmd(struct net_device *dev, struct i596_private *lp)
876 {
877 struct i596_cmd *ptr;
878
879 while (lp->cmd_head != NULL) {
880 ptr = lp->cmd_head;
881 lp->cmd_head = ptr->v_next;
882 lp->cmd_backlog--;
883
884 switch ((ptr->command) & 0x7) {
885 case CmdTx:
886 {
887 struct tx_cmd *tx_cmd = (struct tx_cmd *) ptr;
888 struct sk_buff *skb = tx_cmd->skb;
889 dma_unmap_single(lp->dev, tx_cmd->dma_addr, skb->len, DMA_TO_DEVICE);
890
891 dev_kfree_skb(skb);
892
893 lp->stats.tx_errors++;
894 lp->stats.tx_aborted_errors++;
895
896 ptr->v_next = NULL;
897 ptr->b_next = I596_NULL;
898 tx_cmd->cmd.command = 0; /* Mark as free */
899 break;
900 }
901 default:
902 ptr->v_next = NULL;
903 ptr->b_next = I596_NULL;
904 }
905 CHECK_WBACK_INV(ptr, sizeof(struct i596_cmd));
906 }
907
908 wait_cmd(dev, lp, 100, "i596_cleanup_cmd timed out");
909 lp->scb.cmd = I596_NULL;
910 CHECK_WBACK(&(lp->scb), sizeof(struct i596_scb));
911 }
912
913
914 static inline void i596_reset(struct net_device *dev, struct i596_private *lp)
915 {
916 unsigned long flags;
917
918 DEB(DEB_RESET, printk("i596_reset\n"));
919
920 spin_lock_irqsave (&lp->lock, flags);
921
922 wait_cmd(dev, lp, 100, "i596_reset timed out");
923
924 netif_stop_queue(dev);
925
926 /* FIXME: this command might cause an lpmc */
927 lp->scb.command = CUC_ABORT | RX_ABORT;
928 CHECK_WBACK(&(lp->scb), sizeof(struct i596_scb));
929 CA(dev);
930
931 /* wait for shutdown */
932 wait_cmd(dev, lp, 1000, "i596_reset 2 timed out");
933 spin_unlock_irqrestore (&lp->lock, flags);
934
935 i596_cleanup_cmd(dev,lp);
936 i596_rx(dev);
937
938 netif_start_queue(dev);
939 init_i596_mem(dev);
940 }
941
942
943 static void i596_add_cmd(struct net_device *dev, struct i596_cmd *cmd)
944 {
945 struct i596_private *lp = dev->priv;
946 unsigned long flags;
947
948 DEB(DEB_ADDCMD, printk("i596_add_cmd cmd_head %p\n", lp->cmd_head));
949
950 cmd->status = 0;
951 cmd->command |= (CMD_EOL | CMD_INTR);
952 cmd->v_next = NULL;
953 cmd->b_next = I596_NULL;
954 CHECK_WBACK(cmd, sizeof(struct i596_cmd));
955
956 spin_lock_irqsave (&lp->lock, flags);
957
958 if (lp->cmd_head != NULL) {
959 lp->cmd_tail->v_next = cmd;
960 lp->cmd_tail->b_next = WSWAPcmd(virt_to_dma(lp,&cmd->status));
961 CHECK_WBACK(lp->cmd_tail, sizeof(struct i596_cmd));
962 } else {
963 lp->cmd_head = cmd;
964 wait_cmd(dev, lp, 100, "i596_add_cmd timed out");
965 lp->scb.cmd = WSWAPcmd(virt_to_dma(lp,&cmd->status));
966 lp->scb.command = CUC_START;
967 CHECK_WBACK(&(lp->scb), sizeof(struct i596_scb));
968 CA(dev);
969 }
970 lp->cmd_tail = cmd;
971 lp->cmd_backlog++;
972
973 spin_unlock_irqrestore (&lp->lock, flags);
974
975 if (lp->cmd_backlog > max_cmd_backlog) {
976 unsigned long tickssofar = jiffies - lp->last_cmd;
977
978 if (tickssofar < ticks_limit)
979 return;
980
981 printk("%s: command unit timed out, status resetting.\n", dev->name);
982 #if 1
983 i596_reset(dev, lp);
984 #endif
985 }
986 }
987
988 #if 0
989 /* this function makes a perfectly adequate probe... but we have a
990 device list */
991 static int i596_test(struct net_device *dev)
992 {
993 struct i596_private *lp = dev->priv;
994 volatile int *tint;
995 u32 data;
996
997 tint = (volatile int *)(&(lp->scp));
998 data = virt_to_dma(lp,tint);
999
1000 tint[1] = -1;
1001 CHECK_WBACK(tint,PAGE_SIZE);
1002
1003 MPU_PORT(dev, 1, data);
1004
1005 for(data = 1000000; data; data--) {
1006 CHECK_INV(tint,PAGE_SIZE);
1007 if(tint[1] != -1)
1008 break;
1009
1010 }
1011
1012 printk("i596_test result %d\n", tint[1]);
1013
1014 }
1015 #endif
1016
1017
1018 static int i596_open(struct net_device *dev)
1019 {
1020 DEB(DEB_OPEN, printk("%s: i596_open() irq %d.\n", dev->name, dev->irq));
1021
1022 if (request_irq(dev->irq, &i596_interrupt, 0, "i82596", dev)) {
1023 printk("%s: IRQ %d not free\n", dev->name, dev->irq);
1024 goto out;
1025 }
1026
1027 init_rx_bufs(dev);
1028
1029 if (init_i596_mem(dev)) {
1030 printk("%s: Failed to init memory\n", dev->name);
1031 goto out_remove_rx_bufs;
1032 }
1033
1034 netif_start_queue(dev);
1035
1036 return 0;
1037
1038 out_remove_rx_bufs:
1039 remove_rx_bufs(dev);
1040 free_irq(dev->irq, dev);
1041 out:
1042 return -EAGAIN;
1043 }
1044
1045 static void i596_tx_timeout (struct net_device *dev)
1046 {
1047 struct i596_private *lp = dev->priv;
1048
1049 /* Transmitter timeout, serious problems. */
1050 DEB(DEB_ERRORS, printk("%s: transmit timed out, status resetting.\n",
1051 dev->name));
1052
1053 lp->stats.tx_errors++;
1054
1055 /* Try to restart the adaptor */
1056 if (lp->last_restart == lp->stats.tx_packets) {
1057 DEB(DEB_ERRORS, printk("Resetting board.\n"));
1058 /* Shutdown and restart */
1059 i596_reset (dev, lp);
1060 } else {
1061 /* Issue a channel attention signal */
1062 DEB(DEB_ERRORS, printk("Kicking board.\n"));
1063 lp->scb.command = CUC_START | RX_START;
1064 CHECK_WBACK_INV(&(lp->scb), sizeof(struct i596_scb));
1065 CA (dev);
1066 lp->last_restart = lp->stats.tx_packets;
1067 }
1068
1069 dev->trans_start = jiffies;
1070 netif_wake_queue (dev);
1071 }
1072
1073
1074 static int i596_start_xmit(struct sk_buff *skb, struct net_device *dev)
1075 {
1076 struct i596_private *lp = dev->priv;
1077 struct tx_cmd *tx_cmd;
1078 struct i596_tbd *tbd;
1079 short length = skb->len;
1080 dev->trans_start = jiffies;
1081
1082 DEB(DEB_STARTTX, printk("%s: i596_start_xmit(%x,%p) called\n", dev->name,
1083 skb->len, skb->data));
1084
1085 if (length < ETH_ZLEN) {
1086 skb = skb_padto(skb, ETH_ZLEN);
1087 if (skb == NULL)
1088 return 0;
1089 length = ETH_ZLEN;
1090 }
1091
1092 netif_stop_queue(dev);
1093
1094 tx_cmd = lp->tx_cmds + lp->next_tx_cmd;
1095 tbd = lp->tbds + lp->next_tx_cmd;
1096
1097 if (tx_cmd->cmd.command) {
1098 DEB(DEB_ERRORS, printk("%s: xmit ring full, dropping packet.\n",
1099 dev->name));
1100 lp->stats.tx_dropped++;
1101
1102 dev_kfree_skb(skb);
1103 } else {
1104 if (++lp->next_tx_cmd == TX_RING_SIZE)
1105 lp->next_tx_cmd = 0;
1106 tx_cmd->tbd = WSWAPtbd(virt_to_dma(lp,tbd));
1107 tbd->next = I596_NULL;
1108
1109 tx_cmd->cmd.command = CMD_FLEX | CmdTx;
1110 tx_cmd->skb = skb;
1111
1112 tx_cmd->pad = 0;
1113 tx_cmd->size = 0;
1114 tbd->pad = 0;
1115 tbd->size = EOF | length;
1116
1117 tx_cmd->dma_addr = dma_map_single(lp->dev, skb->data, skb->len,
1118 DMA_TO_DEVICE);
1119 tbd->data = WSWAPchar(tx_cmd->dma_addr);
1120
1121 DEB(DEB_TXADDR,print_eth(skb->data, "tx-queued"));
1122 CHECK_WBACK_INV(tx_cmd, sizeof(struct tx_cmd));
1123 CHECK_WBACK_INV(tbd, sizeof(struct i596_tbd));
1124 i596_add_cmd(dev, &tx_cmd->cmd);
1125
1126 lp->stats.tx_packets++;
1127 lp->stats.tx_bytes += length;
1128 }
1129
1130 netif_start_queue(dev);
1131
1132 return 0;
1133 }
1134
1135 static void print_eth(unsigned char *add, char *str)
1136 {
1137 int i;
1138
1139 printk("i596 0x%p, ", add);
1140 for (i = 0; i < 6; i++)
1141 printk(" %02X", add[i + 6]);
1142 printk(" -->");
1143 for (i = 0; i < 6; i++)
1144 printk(" %02X", add[i]);
1145 printk(" %02X%02X, %s\n", add[12], add[13], str);
1146 }
1147
1148
1149 #define LAN_PROM_ADDR 0xF0810000
1150
1151 static int __devinit i82596_probe(struct net_device *dev,
1152 struct device *gen_dev)
1153 {
1154 int i;
1155 struct i596_private *lp;
1156 char eth_addr[6];
1157 dma_addr_t dma_addr;
1158
1159 /* This lot is ensure things have been cache line aligned. */
1160 if (sizeof(struct i596_rfd) != 32) {
1161 printk("82596: sizeof(struct i596_rfd) = %d\n",
1162 (int)sizeof(struct i596_rfd));
1163 return -ENODEV;
1164 }
1165 if ((sizeof(struct i596_rbd) % 32) != 0) {
1166 printk("82596: sizeof(struct i596_rbd) = %d\n",
1167 (int)sizeof(struct i596_rbd));
1168 return -ENODEV;
1169 }
1170 if ((sizeof(struct tx_cmd) % 32) != 0) {
1171 printk("82596: sizeof(struct tx_cmd) = %d\n",
1172 (int)sizeof(struct tx_cmd));
1173 return -ENODEV;
1174 }
1175 if (sizeof(struct i596_tbd) != 32) {
1176 printk("82596: sizeof(struct i596_tbd) = %d\n",
1177 (int)sizeof(struct i596_tbd));
1178 return -ENODEV;
1179 }
1180 #ifndef __LP64__
1181 if (sizeof(struct i596_private) > 4096) {
1182 printk("82596: sizeof(struct i596_private) = %d\n",
1183 (int)sizeof(struct i596_private));
1184 return -ENODEV;
1185 }
1186 #endif
1187
1188 if (!dev->base_addr || !dev->irq)
1189 return -ENODEV;
1190
1191 if (pdc_lan_station_id(eth_addr, dev->base_addr)) {
1192 for (i=0; i < 6; i++) {
1193 eth_addr[i] = gsc_readb(LAN_PROM_ADDR + i);
1194 }
1195 printk(KERN_INFO "%s: MAC of HP700 LAN read from EEPROM\n", __FILE__);
1196 }
1197
1198 dev->mem_start = (unsigned long) dma_alloc_noncoherent(gen_dev,
1199 sizeof(struct i596_private), &dma_addr, GFP_KERNEL);
1200 if (!dev->mem_start) {
1201 printk(KERN_ERR "%s: Couldn't get shared memory\n", __FILE__);
1202 return -ENOMEM;
1203 }
1204
1205 for (i = 0; i < 6; i++)
1206 dev->dev_addr[i] = eth_addr[i];
1207
1208 /* The 82596-specific entries in the device structure. */
1209 dev->open = i596_open;
1210 dev->stop = i596_close;
1211 dev->hard_start_xmit = i596_start_xmit;
1212 dev->get_stats = i596_get_stats;
1213 dev->set_multicast_list = set_multicast_list;
1214 dev->tx_timeout = i596_tx_timeout;
1215 dev->watchdog_timeo = TX_TIMEOUT;
1216 #ifdef CONFIG_NET_POLL_CONTROLLER
1217 dev->poll_controller = i596_poll_controller;
1218 #endif
1219
1220 dev->priv = (void *)(dev->mem_start);
1221
1222 lp = dev->priv;
1223 memset(lp, 0, sizeof(struct i596_private));
1224
1225 lp->scb.command = 0;
1226 lp->scb.cmd = I596_NULL;
1227 lp->scb.rfd = I596_NULL;
1228 spin_lock_init(&lp->lock);
1229 lp->dma_addr = dma_addr;
1230 lp->dev = gen_dev;
1231
1232 CHECK_WBACK_INV(dev->mem_start, sizeof(struct i596_private));
1233
1234 i = register_netdev(dev);
1235 if (i) {
1236 lp = dev->priv;
1237 dma_free_noncoherent(lp->dev, sizeof(struct i596_private),
1238 (void *)dev->mem_start, lp->dma_addr);
1239 return i;
1240 };
1241
1242 DEB(DEB_PROBE, printk(KERN_INFO "%s: 82596 at %#3lx,", dev->name, dev->base_addr));
1243 for (i = 0; i < 6; i++)
1244 DEB(DEB_PROBE, printk(" %2.2X", dev->dev_addr[i]));
1245 DEB(DEB_PROBE, printk(" IRQ %d.\n", dev->irq));
1246 DEB(DEB_INIT, printk(KERN_INFO "%s: lp at 0x%p (%d bytes), lp->scb at 0x%p\n",
1247 dev->name, lp, (int)sizeof(struct i596_private), &lp->scb));
1248
1249 return 0;
1250 }
1251
1252 #ifdef CONFIG_NET_POLL_CONTROLLER
1253 static void i596_poll_controller(struct net_device *dev)
1254 {
1255 disable_irq(dev->irq);
1256 i596_interrupt(dev->irq, dev, NULL);
1257 enable_irq(dev->irq);
1258 }
1259 #endif
1260
1261 static irqreturn_t i596_interrupt(int irq, void *dev_id, struct pt_regs *regs)
1262 {
1263 struct net_device *dev = dev_id;
1264 struct i596_private *lp;
1265 unsigned short status, ack_cmd = 0;
1266
1267 if (dev == NULL) {
1268 printk("%s: irq %d for unknown device.\n", __FUNCTION__, irq);
1269 return IRQ_NONE;
1270 }
1271
1272 lp = dev->priv;
1273
1274 spin_lock (&lp->lock);
1275
1276 wait_cmd(dev, lp, 100, "i596 interrupt, timeout");
1277 status = lp->scb.status;
1278
1279 DEB(DEB_INTS, printk("%s: i596 interrupt, IRQ %d, status %4.4x.\n",
1280 dev->name, irq, status));
1281
1282 ack_cmd = status & 0xf000;
1283
1284 if (!ack_cmd) {
1285 DEB(DEB_ERRORS, printk("%s: interrupt with no events\n", dev->name));
1286 spin_unlock (&lp->lock);
1287 return IRQ_NONE;
1288 }
1289
1290 if ((status & 0x8000) || (status & 0x2000)) {
1291 struct i596_cmd *ptr;
1292
1293 if ((status & 0x8000))
1294 DEB(DEB_INTS, printk("%s: i596 interrupt completed command.\n", dev->name));
1295 if ((status & 0x2000))
1296 DEB(DEB_INTS, printk("%s: i596 interrupt command unit inactive %x.\n", dev->name, status & 0x0700));
1297
1298 while (lp->cmd_head != NULL) {
1299 CHECK_INV(lp->cmd_head, sizeof(struct i596_cmd));
1300 if (!(lp->cmd_head->status & STAT_C))
1301 break;
1302
1303 ptr = lp->cmd_head;
1304
1305 DEB(DEB_STATUS, printk("cmd_head->status = %04x, ->command = %04x\n",
1306 lp->cmd_head->status, lp->cmd_head->command));
1307 lp->cmd_head = ptr->v_next;
1308 lp->cmd_backlog--;
1309
1310 switch ((ptr->command) & 0x7) {
1311 case CmdTx:
1312 {
1313 struct tx_cmd *tx_cmd = (struct tx_cmd *) ptr;
1314 struct sk_buff *skb = tx_cmd->skb;
1315
1316 if ((ptr->status) & STAT_OK) {
1317 DEB(DEB_TXADDR, print_eth(skb->data, "tx-done"));
1318 } else {
1319 lp->stats.tx_errors++;
1320 if ((ptr->status) & 0x0020)
1321 lp->stats.collisions++;
1322 if (!((ptr->status) & 0x0040))
1323 lp->stats.tx_heartbeat_errors++;
1324 if ((ptr->status) & 0x0400)
1325 lp->stats.tx_carrier_errors++;
1326 if ((ptr->status) & 0x0800)
1327 lp->stats.collisions++;
1328 if ((ptr->status) & 0x1000)
1329 lp->stats.tx_aborted_errors++;
1330 }
1331 dma_unmap_single(lp->dev, tx_cmd->dma_addr, skb->len, DMA_TO_DEVICE);
1332 dev_kfree_skb_irq(skb);
1333
1334 tx_cmd->cmd.command = 0; /* Mark free */
1335 break;
1336 }
1337 case CmdTDR:
1338 {
1339 unsigned short status = ((struct tdr_cmd *)ptr)->status;
1340
1341 if (status & 0x8000) {
1342 DEB(DEB_ANY, printk("%s: link ok.\n", dev->name));
1343 } else {
1344 if (status & 0x4000)
1345 printk("%s: Transceiver problem.\n", dev->name);
1346 if (status & 0x2000)
1347 printk("%s: Termination problem.\n", dev->name);
1348 if (status & 0x1000)
1349 printk("%s: Short circuit.\n", dev->name);
1350
1351 DEB(DEB_TDR, printk("%s: Time %d.\n", dev->name, status & 0x07ff));
1352 }
1353 break;
1354 }
1355 case CmdConfigure:
1356 /* Zap command so set_multicast_list() knows it is free */
1357 ptr->command = 0;
1358 break;
1359 }
1360 ptr->v_next = NULL;
1361 ptr->b_next = I596_NULL;
1362 CHECK_WBACK(ptr, sizeof(struct i596_cmd));
1363 lp->last_cmd = jiffies;
1364 }
1365
1366 /* This mess is arranging that only the last of any outstanding
1367 * commands has the interrupt bit set. Should probably really
1368 * only add to the cmd queue when the CU is stopped.
1369 */
1370 ptr = lp->cmd_head;
1371 while ((ptr != NULL) && (ptr != lp->cmd_tail)) {
1372 struct i596_cmd *prev = ptr;
1373
1374 ptr->command &= 0x1fff;
1375 ptr = ptr->v_next;
1376 CHECK_WBACK_INV(prev, sizeof(struct i596_cmd));
1377 }
1378
1379 if ((lp->cmd_head != NULL))
1380 ack_cmd |= CUC_START;
1381 lp->scb.cmd = WSWAPcmd(virt_to_dma(lp,&lp->cmd_head->status));
1382 CHECK_WBACK_INV(&lp->scb, sizeof(struct i596_scb));
1383 }
1384 if ((status & 0x1000) || (status & 0x4000)) {
1385 if ((status & 0x4000))
1386 DEB(DEB_INTS, printk("%s: i596 interrupt received a frame.\n", dev->name));
1387 i596_rx(dev);
1388 /* Only RX_START if stopped - RGH 07-07-96 */
1389 if (status & 0x1000) {
1390 if (netif_running(dev)) {
1391 DEB(DEB_ERRORS, printk("%s: i596 interrupt receive unit inactive, status 0x%x\n", dev->name, status));
1392 ack_cmd |= RX_START;
1393 lp->stats.rx_errors++;
1394 lp->stats.rx_fifo_errors++;
1395 rebuild_rx_bufs(dev);
1396 }
1397 }
1398 }
1399 wait_cmd(dev, lp, 100, "i596 interrupt, timeout");
1400 lp->scb.command = ack_cmd;
1401 CHECK_WBACK(&lp->scb, sizeof(struct i596_scb));
1402
1403 /* DANGER: I suspect that some kind of interrupt
1404 acknowledgement aside from acking the 82596 might be needed
1405 here... but it's running acceptably without */
1406
1407 CA(dev);
1408
1409 wait_cmd(dev, lp, 100, "i596 interrupt, exit timeout");
1410 DEB(DEB_INTS, printk("%s: exiting interrupt.\n", dev->name));
1411
1412 spin_unlock (&lp->lock);
1413 return IRQ_HANDLED;
1414 }
1415
1416 static int i596_close(struct net_device *dev)
1417 {
1418 struct i596_private *lp = dev->priv;
1419 unsigned long flags;
1420
1421 netif_stop_queue(dev);
1422
1423 DEB(DEB_INIT, printk("%s: Shutting down ethercard, status was %4.4x.\n",
1424 dev->name, lp->scb.status));
1425
1426 spin_lock_irqsave(&lp->lock, flags);
1427
1428 wait_cmd(dev, lp, 100, "close1 timed out");
1429 lp->scb.command = CUC_ABORT | RX_ABORT;
1430 CHECK_WBACK(&lp->scb, sizeof(struct i596_scb));
1431
1432 CA(dev);
1433
1434 wait_cmd(dev, lp, 100, "close2 timed out");
1435 spin_unlock_irqrestore(&lp->lock, flags);
1436 DEB(DEB_STRUCT,i596_display_data(dev));
1437 i596_cleanup_cmd(dev,lp);
1438
1439 disable_irq(dev->irq);
1440
1441 free_irq(dev->irq, dev);
1442 remove_rx_bufs(dev);
1443
1444 return 0;
1445 }
1446
1447 static struct net_device_stats *
1448 i596_get_stats(struct net_device *dev)
1449 {
1450 struct i596_private *lp = dev->priv;
1451
1452 return &lp->stats;
1453 }
1454
1455 /*
1456 * Set or clear the multicast filter for this adaptor.
1457 */
1458
1459 static void set_multicast_list(struct net_device *dev)
1460 {
1461 struct i596_private *lp = dev->priv;
1462 int config = 0, cnt;
1463
1464 DEB(DEB_MULTI, printk("%s: set multicast list, %d entries, promisc %s, allmulti %s\n",
1465 dev->name, dev->mc_count, dev->flags & IFF_PROMISC ? "ON" : "OFF",
1466 dev->flags & IFF_ALLMULTI ? "ON" : "OFF"));
1467
1468 if ((dev->flags & IFF_PROMISC) && !(lp->cf_cmd.i596_config[8] & 0x01)) {
1469 lp->cf_cmd.i596_config[8] |= 0x01;
1470 config = 1;
1471 }
1472 if (!(dev->flags & IFF_PROMISC) && (lp->cf_cmd.i596_config[8] & 0x01)) {
1473 lp->cf_cmd.i596_config[8] &= ~0x01;
1474 config = 1;
1475 }
1476 if ((dev->flags & IFF_ALLMULTI) && (lp->cf_cmd.i596_config[11] & 0x20)) {
1477 lp->cf_cmd.i596_config[11] &= ~0x20;
1478 config = 1;
1479 }
1480 if (!(dev->flags & IFF_ALLMULTI) && !(lp->cf_cmd.i596_config[11] & 0x20)) {
1481 lp->cf_cmd.i596_config[11] |= 0x20;
1482 config = 1;
1483 }
1484 if (config) {
1485 if (lp->cf_cmd.cmd.command)
1486 printk("%s: config change request already queued\n",
1487 dev->name);
1488 else {
1489 lp->cf_cmd.cmd.command = CmdConfigure;
1490 CHECK_WBACK_INV(&lp->cf_cmd, sizeof(struct cf_cmd));
1491 i596_add_cmd(dev, &lp->cf_cmd.cmd);
1492 }
1493 }
1494
1495 cnt = dev->mc_count;
1496 if (cnt > MAX_MC_CNT)
1497 {
1498 cnt = MAX_MC_CNT;
1499 printk("%s: Only %d multicast addresses supported",
1500 dev->name, cnt);
1501 }
1502
1503 if (dev->mc_count > 0) {
1504 struct dev_mc_list *dmi;
1505 unsigned char *cp;
1506 struct mc_cmd *cmd;
1507
1508 cmd = &lp->mc_cmd;
1509 cmd->cmd.command = CmdMulticastList;
1510 cmd->mc_cnt = dev->mc_count * 6;
1511 cp = cmd->mc_addrs;
1512 for (dmi = dev->mc_list; cnt && dmi != NULL; dmi = dmi->next, cnt--, cp += 6) {
1513 memcpy(cp, dmi->dmi_addr, 6);
1514 if (i596_debug > 1)
1515 DEB(DEB_MULTI, printk("%s: Adding address %02x:%02x:%02x:%02x:%02x:%02x\n",
1516 dev->name, cp[0],cp[1],cp[2],cp[3],cp[4],cp[5]));
1517 }
1518 CHECK_WBACK_INV(&lp->mc_cmd, sizeof(struct mc_cmd));
1519 i596_add_cmd(dev, &cmd->cmd);
1520 }
1521 }
1522
1523 MODULE_PARM(debug, "i");
1524 MODULE_PARM_DESC(debug, "lasi_82596 debug mask");
1525 static int debug = -1;
1526
1527 static int num_drivers;
1528 static struct net_device *netdevs[MAX_DRIVERS];
1529
1530 static int __devinit
1531 lan_init_chip(struct parisc_device *dev)
1532 {
1533 struct net_device *netdevice;
1534 int retval;
1535
1536 if (num_drivers >= MAX_DRIVERS) {
1537 /* max count of possible i82596 drivers reached */
1538 return -ENOMEM;
1539 }
1540
1541 if (num_drivers == 0)
1542 printk(KERN_INFO LASI_82596_DRIVER_VERSION "\n");
1543
1544 if (!dev->irq) {
1545 printk(KERN_ERR "%s: IRQ not found for i82596 at 0x%lx\n",
1546 __FILE__, dev->hpa.start);
1547 return -ENODEV;
1548 }
1549
1550 printk(KERN_INFO "Found i82596 at 0x%lx, IRQ %d\n", dev->hpa.start,
1551 dev->irq);
1552
1553 netdevice = alloc_etherdev(0);
1554 if (!netdevice)
1555 return -ENOMEM;
1556
1557 netdevice->base_addr = dev->hpa.start;
1558 netdevice->irq = dev->irq;
1559
1560 retval = i82596_probe(netdevice, &dev->dev);
1561 if (retval) {
1562 free_netdev(netdevice);
1563 return -ENODEV;
1564 }
1565
1566 if (dev->id.sversion == 0x72) {
1567 ((struct i596_private *)netdevice->priv)->options = OPT_SWAP_PORT;
1568 }
1569
1570 netdevs[num_drivers++] = netdevice;
1571
1572 return retval;
1573 }
1574
1575
1576 static struct parisc_device_id lan_tbl[] = {
1577 { HPHW_FIO, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x0008a },
1578 { HPHW_FIO, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x00072 },
1579 { 0, }
1580 };
1581
1582 MODULE_DEVICE_TABLE(parisc, lan_tbl);
1583
1584 static struct parisc_driver lan_driver = {
1585 .name = "lasi_82596",
1586 .id_table = lan_tbl,
1587 .probe = lan_init_chip,
1588 };
1589
1590 static int __devinit lasi_82596_init(void)
1591 {
1592 if (debug >= 0)
1593 i596_debug = debug;
1594 return register_parisc_driver(&lan_driver);
1595 }
1596
1597 module_init(lasi_82596_init);
1598
1599 static void __exit lasi_82596_exit(void)
1600 {
1601 int i;
1602
1603 for (i=0; i<MAX_DRIVERS; i++) {
1604 struct i596_private *lp;
1605 struct net_device *netdevice;
1606
1607 netdevice = netdevs[i];
1608 if (!netdevice)
1609 continue;
1610
1611 unregister_netdev(netdevice);
1612
1613 lp = netdevice->priv;
1614 dma_free_noncoherent(lp->dev, sizeof(struct i596_private),
1615 (void *)netdevice->mem_start, lp->dma_addr);
1616 free_netdev(netdevice);
1617 }
1618 num_drivers = 0;
1619
1620 unregister_parisc_driver(&lan_driver);
1621 }
1622
1623 module_exit(lasi_82596_exit);
Stable & featurefull patchset based on Linus's git branch