projects / deliverable / linux.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
[NET] drivers/net: statistics cleanup #1 -- save memory and shrink code
[deliverable/linux.git] / drivers / net / lib82596.c
CommitLineData
2187f287
TB		 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
125static 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 */
130static 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
145enum 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
167struct 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
176struct 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
194struct 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
201struct 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
215struct tdr_cmd {
216 struct i596_cmd cmd;
217 unsigned short status;
218 unsigned short pad;
219};
220
221struct mc_cmd {
222 struct i596_cmd cmd;
223 short mc_cnt;
224 char mc_addrs[MAX_MC_CNT*6];
225};
226
227struct sa_cmd {
228 struct i596_cmd cmd;
229 char eth_addr[8];
230};
231
232struct cf_cmd {
233 struct i596_cmd cmd;
234 char i596_config[16];
235};
236
237struct 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
251struct 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
275struct 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
290struct i596_iscp {
291 u32 stat;
292 dma_addr_t scb;
293};
294
295struct i596_scp {
296 u32 sysbus;
297 u32 pad;
298 dma_addr_t iscp;
299};
300
301struct 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
315struct 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;
2187f287
TB		 325 int next_tx_cmd;
326 int options;
327 spinlock_t lock; /* serialize access to chip */
328 dma_addr_t dma_addr;
329 void __iomem *mpu_port;
330 void __iomem *ca;
331};
332
333static const char init_setup[] =
334{
335 0x8E, /* length, prefetch on */
336 0xC8, /* fifo to 8, monitor off */
337 0x80, /* don't save bad frames */
338 0x2E, /* No source address insertion, 8 byte preamble */
339 0x00, /* priority and backoff defaults */
340 0x60, /* interframe spacing */
341 0x00, /* slot time LSB */
342 0xf2, /* slot time and retries */
343 0x00, /* promiscuous mode */
344 0x00, /* collision detect */
345 0x40, /* minimum frame length */
346 0xff,
347 0x00,
348 0x7f /* *multi IA */ };
349
350static int i596_open(struct net_device *dev);
351static int i596_start_xmit(struct sk_buff *skb, struct net_device *dev);
352static irqreturn_t i596_interrupt(int irq, void *dev_id);
353static int i596_close(struct net_device *dev);
2187f287
TB		 354static void i596_add_cmd(struct net_device *dev, struct i596_cmd *cmd);
355static void i596_tx_timeout (struct net_device *dev);
356static void print_eth(unsigned char *buf, char *str);
357static void set_multicast_list(struct net_device *dev);
358static inline void ca(struct net_device *dev);
359static void mpu_port(struct net_device *dev, int c, dma_addr_t x);
360
361static int rx_ring_size = RX_RING_SIZE;
362static int ticks_limit = 100;
363static int max_cmd_backlog = TX_RING_SIZE-1;
364
365#ifdef CONFIG_NET_POLL_CONTROLLER
366static void i596_poll_controller(struct net_device *dev);
367#endif
368
369
370static inline int wait_istat(struct net_device *dev, struct i596_dma *dma, int delcnt, char *str)
371{
372 DMA_INV(dev, &(dma->iscp), sizeof(struct i596_iscp));
373 while (--delcnt && dma->iscp.stat) {
374 udelay(10);
375 DMA_INV(dev, &(dma->iscp), sizeof(struct i596_iscp));
376 }
377 if (!delcnt) {
378 printk(KERN_ERR "%s: %s, iscp.stat %04x, didn't clear\n",
379 dev->name, str, SWAP16(dma->iscp.stat));
380 return -1;
381 } else
382 return 0;
383}
384
385
386static inline int wait_cmd(struct net_device *dev, struct i596_dma *dma, int delcnt, char *str)
387{
388 DMA_INV(dev, &(dma->scb), sizeof(struct i596_scb));
389 while (--delcnt && dma->scb.command) {
390 udelay(10);
391 DMA_INV(dev, &(dma->scb), sizeof(struct i596_scb));
392 }
393 if (!delcnt) {
394 printk(KERN_ERR "%s: %s, status %4.4x, cmd %4.4x.\n",
395 dev->name, str,
396 SWAP16(dma->scb.status),
397 SWAP16(dma->scb.command));
398 return -1;
399 } else
400 return 0;
401}
402
403
404static void i596_display_data(struct net_device *dev)
405{
406 struct i596_private *lp = netdev_priv(dev);
407 struct i596_dma *dma = lp->dma;
408 struct i596_cmd *cmd;
409 struct i596_rfd *rfd;
410 struct i596_rbd *rbd;
411
412 printk(KERN_DEBUG "lp and scp at %p, .sysbus = %08x, .iscp = %08x\n",
413 &dma->scp, dma->scp.sysbus, SWAP32(dma->scp.iscp));
414 printk(KERN_DEBUG "iscp at %p, iscp.stat = %08x, .scb = %08x\n",
415 &dma->iscp, SWAP32(dma->iscp.stat), SWAP32(dma->iscp.scb));
416 printk(KERN_DEBUG "scb at %p, scb.status = %04x, .command = %04x,"
417 " .cmd = %08x, .rfd = %08x\n",
418 &dma->scb, SWAP16(dma->scb.status), SWAP16(dma->scb.command),
419 SWAP16(dma->scb.cmd), SWAP32(dma->scb.rfd));
420 printk(KERN_DEBUG " errors: crc %x, align %x, resource %x,"
421 " over %x, rcvdt %x, short %x\n",
422 SWAP32(dma->scb.crc_err), SWAP32(dma->scb.align_err),
423 SWAP32(dma->scb.resource_err), SWAP32(dma->scb.over_err),
424 SWAP32(dma->scb.rcvdt_err), SWAP32(dma->scb.short_err));
425 cmd = lp->cmd_head;
426 while (cmd != NULL) {
427 printk(KERN_DEBUG
428 "cmd at %p, .status = %04x, .command = %04x,"
429 " .b_next = %08x\n",
430 cmd, SWAP16(cmd->status), SWAP16(cmd->command),
431 SWAP32(cmd->b_next));
432 cmd = cmd->v_next;
433 }
434 rfd = lp->rfd_head;
435 printk(KERN_DEBUG "rfd_head = %p\n", rfd);
436 do {
437 printk(KERN_DEBUG
438 " %p .stat %04x, .cmd %04x, b_next %08x, rbd %08x,"
439 " count %04x\n",
440 rfd, SWAP16(rfd->stat), SWAP16(rfd->cmd),
441 SWAP32(rfd->b_next), SWAP32(rfd->rbd),
442 SWAP16(rfd->count));
443 rfd = rfd->v_next;
444 } while (rfd != lp->rfd_head);
445 rbd = lp->rbd_head;
446 printk(KERN_DEBUG "rbd_head = %p\n", rbd);
447 do {
448 printk(KERN_DEBUG
449 " %p .count %04x, b_next %08x, b_data %08x,"
450 " size %04x\n",
451 rbd, SWAP16(rbd->count), SWAP32(rbd->b_next),
452 SWAP32(rbd->b_data), SWAP16(rbd->size));
453 rbd = rbd->v_next;
454 } while (rbd != lp->rbd_head);
455 DMA_INV(dev, dma, sizeof(struct i596_dma));
456}
457
458
459#define virt_to_dma(lp, v) ((lp)->dma_addr + (dma_addr_t)((unsigned long)(v)-(unsigned long)((lp)->dma)))
460
461static inline int init_rx_bufs(struct net_device *dev)
462{
463 struct i596_private *lp = netdev_priv(dev);
464 struct i596_dma *dma = lp->dma;
465 int i;
466 struct i596_rfd *rfd;
467 struct i596_rbd *rbd;
468
469 /* First build the Receive Buffer Descriptor List */
470
471 for (i = 0, rbd = dma->rbds; i < rx_ring_size; i++, rbd++) {
472 dma_addr_t dma_addr;
473 struct sk_buff *skb = netdev_alloc_skb(dev, PKT_BUF_SZ + 4);
474
475 if (skb == NULL)
476 return -1;
477 skb_reserve(skb, 2);
478 dma_addr = dma_map_single(dev->dev.parent, skb->data,
479 PKT_BUF_SZ, DMA_FROM_DEVICE);
480 rbd->v_next = rbd+1;
481 rbd->b_next = SWAP32(virt_to_dma(lp, rbd+1));
482 rbd->b_addr = SWAP32(virt_to_dma(lp, rbd));
483 rbd->skb = skb;
484 rbd->v_data = skb->data;
485 rbd->b_data = SWAP32(dma_addr);
486 rbd->size = SWAP16(PKT_BUF_SZ);
487 }
488 lp->rbd_head = dma->rbds;
489 rbd = dma->rbds + rx_ring_size - 1;
490 rbd->v_next = dma->rbds;
491 rbd->b_next = SWAP32(virt_to_dma(lp, dma->rbds));
492
493 /* Now build the Receive Frame Descriptor List */
494
495 for (i = 0, rfd = dma->rfds; i < rx_ring_size; i++, rfd++) {
496 rfd->rbd = I596_NULL;
497 rfd->v_next = rfd+1;
498 rfd->v_prev = rfd-1;
499 rfd->b_next = SWAP32(virt_to_dma(lp, rfd+1));
500 rfd->cmd = SWAP16(CMD_FLEX);
501 }
502 lp->rfd_head = dma->rfds;
503 dma->scb.rfd = SWAP32(virt_to_dma(lp, dma->rfds));
504 rfd = dma->rfds;
505 rfd->rbd = SWAP32(virt_to_dma(lp, lp->rbd_head));
506 rfd->v_prev = dma->rfds + rx_ring_size - 1;
507 rfd = dma->rfds + rx_ring_size - 1;
508 rfd->v_next = dma->rfds;
509 rfd->b_next = SWAP32(virt_to_dma(lp, dma->rfds));
510 rfd->cmd = SWAP16(CMD_EOL|CMD_FLEX);
511
512 DMA_WBACK_INV(dev, dma, sizeof(struct i596_dma));
513 return 0;
514}
515
516static inline void remove_rx_bufs(struct net_device *dev)
517{
518 struct i596_private *lp = netdev_priv(dev);
519 struct i596_rbd *rbd;
520 int i;
521
522 for (i = 0, rbd = lp->dma->rbds; i < rx_ring_size; i++, rbd++) {
523 if (rbd->skb == NULL)
524 break;
525 dma_unmap_single(dev->dev.parent,
526 (dma_addr_t)SWAP32(rbd->b_data),
527 PKT_BUF_SZ, DMA_FROM_DEVICE);
528 dev_kfree_skb(rbd->skb);
529 }
530}
531
532
533static void rebuild_rx_bufs(struct net_device *dev)
534{
535 struct i596_private *lp = netdev_priv(dev);
536 struct i596_dma *dma = lp->dma;
537 int i;
538
539 /* Ensure rx frame/buffer descriptors are tidy */
540
541 for (i = 0; i < rx_ring_size; i++) {
542 dma->rfds[i].rbd = I596_NULL;
543 dma->rfds[i].cmd = SWAP16(CMD_FLEX);
544 }
545 dma->rfds[rx_ring_size-1].cmd = SWAP16(CMD_EOL|CMD_FLEX);
546 lp->rfd_head = dma->rfds;
547 dma->scb.rfd = SWAP32(virt_to_dma(lp, dma->rfds));
548 lp->rbd_head = dma->rbds;
549 dma->rfds[0].rbd = SWAP32(virt_to_dma(lp, dma->rbds));
550
551 DMA_WBACK_INV(dev, dma, sizeof(struct i596_dma));
552}
553
554
555static int init_i596_mem(struct net_device *dev)
556{
557 struct i596_private *lp = netdev_priv(dev);
558 struct i596_dma *dma = lp->dma;
559 unsigned long flags;
560
561 mpu_port(dev, PORT_RESET, 0);
562 udelay(100); /* Wait 100us - seems to help */
563
564 /* change the scp address */
565
566 lp->last_cmd = jiffies;
567
568 dma->scp.sysbus = SYSBUS;
569 dma->scp.iscp = SWAP32(virt_to_dma(lp, &(dma->iscp)));
570 dma->iscp.scb = SWAP32(virt_to_dma(lp, &(dma->scb)));
571 dma->iscp.stat = SWAP32(ISCP_BUSY);
572 lp->cmd_backlog = 0;
573
574 lp->cmd_head = NULL;
575 dma->scb.cmd = I596_NULL;
576
577 DEB(DEB_INIT, printk(KERN_DEBUG "%s: starting i82596.\n", dev->name));
578
579 DMA_WBACK(dev, &(dma->scp), sizeof(struct i596_scp));
580 DMA_WBACK(dev, &(dma->iscp), sizeof(struct i596_iscp));
581 DMA_WBACK(dev, &(dma->scb), sizeof(struct i596_scb));
582
583 mpu_port(dev, PORT_ALTSCP, virt_to_dma(lp, &dma->scp));
584 ca(dev);
585 if (wait_istat(dev, dma, 1000, "initialization timed out"))
586 goto failed;
587 DEB(DEB_INIT, printk(KERN_DEBUG
588 "%s: i82596 initialization successful\n",
589 dev->name));
590
591 if (request_irq(dev->irq, &i596_interrupt, 0, "i82596", dev)) {
592 printk(KERN_ERR "%s: IRQ %d not free\n", dev->name, dev->irq);
593 goto failed;
594 }
595
596 /* Ensure rx frame/buffer descriptors are tidy */
597 rebuild_rx_bufs(dev);
598
599 dma->scb.command = 0;
600 DMA_WBACK(dev, &(dma->scb), sizeof(struct i596_scb));
601
602 DEB(DEB_INIT, printk(KERN_DEBUG
603 "%s: queuing CmdConfigure\n", dev->name));
604 memcpy(dma->cf_cmd.i596_config, init_setup, 14);
605 dma->cf_cmd.cmd.command = SWAP16(CmdConfigure);
606 DMA_WBACK(dev, &(dma->cf_cmd), sizeof(struct cf_cmd));
607 i596_add_cmd(dev, &dma->cf_cmd.cmd);
608
609 DEB(DEB_INIT, printk(KERN_DEBUG "%s: queuing CmdSASetup\n", dev->name));
610 memcpy(dma->sa_cmd.eth_addr, dev->dev_addr, 6);
611 dma->sa_cmd.cmd.command = SWAP16(CmdSASetup);
612 DMA_WBACK(dev, &(dma->sa_cmd), sizeof(struct sa_cmd));
613 i596_add_cmd(dev, &dma->sa_cmd.cmd);
614
615 DEB(DEB_INIT, printk(KERN_DEBUG "%s: queuing CmdTDR\n", dev->name));
616 dma->tdr_cmd.cmd.command = SWAP16(CmdTDR);
617 DMA_WBACK(dev, &(dma->tdr_cmd), sizeof(struct tdr_cmd));
618 i596_add_cmd(dev, &dma->tdr_cmd.cmd);
619
620 spin_lock_irqsave (&lp->lock, flags);
621
622 if (wait_cmd(dev, dma, 1000, "timed out waiting to issue RX_START")) {
623 spin_unlock_irqrestore (&lp->lock, flags);
624 goto failed_free_irq;
625 }
626 DEB(DEB_INIT, printk(KERN_DEBUG "%s: Issuing RX_START\n", dev->name));
627 dma->scb.command = SWAP16(RX_START);
628 dma->scb.rfd = SWAP32(virt_to_dma(lp, dma->rfds));
629 DMA_WBACK(dev, &(dma->scb), sizeof(struct i596_scb));
630
631 ca(dev);
632
633 spin_unlock_irqrestore (&lp->lock, flags);
634 if (wait_cmd(dev, dma, 1000, "RX_START not processed"))
635 goto failed_free_irq;
636 DEB(DEB_INIT, printk(KERN_DEBUG
637 "%s: Receive unit started OK\n", dev->name));
638 return 0;
639
640failed_free_irq:
641 free_irq(dev->irq, dev);
642failed:
643 printk(KERN_ERR "%s: Failed to initialise 82596\n", dev->name);
644 mpu_port(dev, PORT_RESET, 0);
645 return -1;
646}
647
648
649static inline int i596_rx(struct net_device *dev)
650{
651 struct i596_private *lp = netdev_priv(dev);
652 struct i596_rfd *rfd;
653 struct i596_rbd *rbd;
654 int frames = 0;
655
656 DEB(DEB_RXFRAME, printk(KERN_DEBUG
657 "i596_rx(), rfd_head %p, rbd_head %p\n",
658 lp->rfd_head, lp->rbd_head));
659
660
661 rfd = lp->rfd_head; /* Ref next frame to check */
662
663 DMA_INV(dev, rfd, sizeof(struct i596_rfd));
664 while (rfd->stat & SWAP16(STAT_C)) { /* Loop while complete frames */
665 if (rfd->rbd == I596_NULL)
666 rbd = NULL;
667 else if (rfd->rbd == lp->rbd_head->b_addr) {
668 rbd = lp->rbd_head;
669 DMA_INV(dev, rbd, sizeof(struct i596_rbd));
670 } else {
671 printk(KERN_ERR "%s: rbd chain broken!\n", dev->name);
672 /* XXX Now what? */
673 rbd = NULL;
674 }
675 DEB(DEB_RXFRAME, printk(KERN_DEBUG
676 " rfd %p, rfd.rbd %08x, rfd.stat %04x\n",
677 rfd, rfd->rbd, rfd->stat));
678
679 if (rbd != NULL && (rfd->stat & SWAP16(STAT_OK))) {
680 /* a good frame */
681 int pkt_len = SWAP16(rbd->count) & 0x3fff;
682 struct sk_buff *skb = rbd->skb;
683 int rx_in_place = 0;
684
685 DEB(DEB_RXADDR, print_eth(rbd->v_data, "received"));
686 frames++;
687
688 /* Check if the packet is long enough to just accept
689 * without copying to a properly sized skbuff.
690 */
691
692 if (pkt_len > rx_copybreak) {
693 struct sk_buff *newskb;
694 dma_addr_t dma_addr;
695
696 dma_unmap_single(dev->dev.parent,
697 (dma_addr_t)SWAP32(rbd->b_data),
698 PKT_BUF_SZ, DMA_FROM_DEVICE);
699 /* Get fresh skbuff to replace filled one. */
700 newskb = netdev_alloc_skb(dev, PKT_BUF_SZ + 4);
701 if (newskb == NULL) {
702 skb = NULL; /* drop pkt */
703 goto memory_squeeze;
704 }
705 skb_reserve(newskb, 2);
706
707 /* Pass up the skb already on the Rx ring. */
708 skb_put(skb, pkt_len);
709 rx_in_place = 1;
710 rbd->skb = newskb;
711 dma_addr = dma_map_single(dev->dev.parent,
712 newskb->data,
713 PKT_BUF_SZ,
714 DMA_FROM_DEVICE);
715 rbd->v_data = newskb->data;
716 rbd->b_data = SWAP32(dma_addr);
717 DMA_WBACK_INV(dev, rbd, sizeof(struct i596_rbd));
718 } else
719 skb = netdev_alloc_skb(dev, pkt_len + 2);
720memory_squeeze:
721 if (skb == NULL) {
722 /* XXX tulip.c can defer packets here!! */
723 printk(KERN_ERR
724 "%s: i596_rx Memory squeeze, dropping packet.\n",
725 dev->name);
09f75cd7 726 dev->stats.rx_dropped++;
2187f287
TB		 727 } else {
728 if (!rx_in_place) {
729 /* 16 byte align the data fields */
730 dma_sync_single_for_cpu(dev->dev.parent,
731 (dma_addr_t)SWAP32(rbd->b_data),
732 PKT_BUF_SZ, DMA_FROM_DEVICE);
733 skb_reserve(skb, 2);
734 memcpy(skb_put(skb, pkt_len), rbd->v_data, pkt_len);
735 dma_sync_single_for_device(dev->dev.parent,
736 (dma_addr_t)SWAP32(rbd->b_data),
737 PKT_BUF_SZ, DMA_FROM_DEVICE);
738 }
739 skb->len = pkt_len;
740 skb->protocol = eth_type_trans(skb, dev);
741 netif_rx(skb);
742 dev->last_rx = jiffies;
09f75cd7
JG		 743 dev->stats.rx_packets++;
744 dev->stats.rx_bytes += pkt_len;
2187f287
TB		 745 }
746 } else {
747 DEB(DEB_ERRORS, printk(KERN_DEBUG
748 "%s: Error, rfd.stat = 0x%04x\n",
749 dev->name, rfd->stat));
09f75cd7 750 dev->stats.rx_errors++;
2187f287 751 if (rfd->stat & SWAP16(0x0100))
09f75cd7 752 dev->stats.collisions++;
2187f287 753 if (rfd->stat & SWAP16(0x8000))
09f75cd7 754 dev->stats.rx_length_errors++;
2187f287 755 if (rfd->stat & SWAP16(0x0001))
09f75cd7 756 dev->stats.rx_over_errors++;
2187f287 757 if (rfd->stat & SWAP16(0x0002))
09f75cd7 758 dev->stats.rx_fifo_errors++;
2187f287 759 if (rfd->stat & SWAP16(0x0004))
09f75cd7 760 dev->stats.rx_frame_errors++;
2187f287 761 if (rfd->stat & SWAP16(0x0008))
09f75cd7 762 dev->stats.rx_crc_errors++;
2187f287 763 if (rfd->stat & SWAP16(0x0010))
09f75cd7 764 dev->stats.rx_length_errors++;
2187f287
TB		 765 }
766
767 /* Clear the buffer descriptor count and EOF + F flags */
768
769 if (rbd != NULL && (rbd->count & SWAP16(0x4000))) {
770 rbd->count = 0;
771 lp->rbd_head = rbd->v_next;
772 DMA_WBACK_INV(dev, rbd, sizeof(struct i596_rbd));
773 }
774
775 /* Tidy the frame descriptor, marking it as end of list */
776
777 rfd->rbd = I596_NULL;
778 rfd->stat = 0;
779 rfd->cmd = SWAP16(CMD_EOL|CMD_FLEX);
780 rfd->count = 0;
781
782 /* Update record of next frame descriptor to process */
783
784 lp->dma->scb.rfd = rfd->b_next;
785 lp->rfd_head = rfd->v_next;
786 DMA_WBACK_INV(dev, rfd, sizeof(struct i596_rfd));
787
788 /* Remove end-of-list from old end descriptor */
789
790 rfd->v_prev->cmd = SWAP16(CMD_FLEX);
791 DMA_WBACK_INV(dev, rfd->v_prev, sizeof(struct i596_rfd));
792 rfd = lp->rfd_head;
793 DMA_INV(dev, rfd, sizeof(struct i596_rfd));
794 }
795
796 DEB(DEB_RXFRAME, printk(KERN_DEBUG "frames %d\n", frames));
797
798 return 0;
799}
800
801
802static inline void i596_cleanup_cmd(struct net_device *dev, struct i596_private *lp)
803{
804 struct i596_cmd *ptr;
805
806 while (lp->cmd_head != NULL) {
807 ptr = lp->cmd_head;
808 lp->cmd_head = ptr->v_next;
809 lp->cmd_backlog--;
810
811 switch (SWAP16(ptr->command) & 0x7) {
812 case CmdTx:
813 {
814 struct tx_cmd *tx_cmd = (struct tx_cmd *) ptr;
815 struct sk_buff *skb = tx_cmd->skb;
816 dma_unmap_single(dev->dev.parent,
817 tx_cmd->dma_addr,
818 skb->len, DMA_TO_DEVICE);
819
820 dev_kfree_skb(skb);
821
09f75cd7
JG		 822 dev->stats.tx_errors++;
823 dev->stats.tx_aborted_errors++;
2187f287
TB		 824
825 ptr->v_next = NULL;
826 ptr->b_next = I596_NULL;
827 tx_cmd->cmd.command = 0; /* Mark as free */
828 break;
829 }
830 default:
831 ptr->v_next = NULL;
832 ptr->b_next = I596_NULL;
833 }
834 DMA_WBACK_INV(dev, ptr, sizeof(struct i596_cmd));
835 }
836
837 wait_cmd(dev, lp->dma, 100, "i596_cleanup_cmd timed out");
838 lp->dma->scb.cmd = I596_NULL;
839 DMA_WBACK(dev, &(lp->dma->scb), sizeof(struct i596_scb));
840}
841
842
843static inline void i596_reset(struct net_device *dev, struct i596_private *lp)
844{
845 unsigned long flags;
846
847 DEB(DEB_RESET, printk(KERN_DEBUG "i596_reset\n"));
848
849 spin_lock_irqsave (&lp->lock, flags);
850
851 wait_cmd(dev, lp->dma, 100, "i596_reset timed out");
852
853 netif_stop_queue(dev);
854
855 /* FIXME: this command might cause an lpmc */
856 lp->dma->scb.command = SWAP16(CUC_ABORT | RX_ABORT);
857 DMA_WBACK(dev, &(lp->dma->scb), sizeof(struct i596_scb));
858 ca(dev);
859
860 /* wait for shutdown */
861 wait_cmd(dev, lp->dma, 1000, "i596_reset 2 timed out");
862 spin_unlock_irqrestore (&lp->lock, flags);
863
864 i596_cleanup_cmd(dev, lp);
865 i596_rx(dev);
866
867 netif_start_queue(dev);
868 init_i596_mem(dev);
869}
870
871
872static void i596_add_cmd(struct net_device *dev, struct i596_cmd *cmd)
873{
874 struct i596_private *lp = netdev_priv(dev);
875 struct i596_dma *dma = lp->dma;
876 unsigned long flags;
877
878 DEB(DEB_ADDCMD, printk(KERN_DEBUG "i596_add_cmd cmd_head %p\n",
879 lp->cmd_head));
880
881 cmd->status = 0;
882 cmd->command |= SWAP16(CMD_EOL | CMD_INTR);
883 cmd->v_next = NULL;
884 cmd->b_next = I596_NULL;
885 DMA_WBACK(dev, cmd, sizeof(struct i596_cmd));
886
887 spin_lock_irqsave (&lp->lock, flags);
888
889 if (lp->cmd_head != NULL) {
890 lp->cmd_tail->v_next = cmd;
891 lp->cmd_tail->b_next = SWAP32(virt_to_dma(lp, &cmd->status));
892 DMA_WBACK(dev, lp->cmd_tail, sizeof(struct i596_cmd));
893 } else {
894 lp->cmd_head = cmd;
895 wait_cmd(dev, dma, 100, "i596_add_cmd timed out");
896 dma->scb.cmd = SWAP32(virt_to_dma(lp, &cmd->status));
897 dma->scb.command = SWAP16(CUC_START);
898 DMA_WBACK(dev, &(dma->scb), sizeof(struct i596_scb));
899 ca(dev);
900 }
901 lp->cmd_tail = cmd;
902 lp->cmd_backlog++;
903
904 spin_unlock_irqrestore (&lp->lock, flags);
905
906 if (lp->cmd_backlog > max_cmd_backlog) {
907 unsigned long tickssofar = jiffies - lp->last_cmd;
908
909 if (tickssofar < ticks_limit)
910 return;
911
912 printk(KERN_ERR
913 "%s: command unit timed out, status resetting.\n",
914 dev->name);
915#if 1
916 i596_reset(dev, lp);
917#endif
918 }
919}
920
921static int i596_open(struct net_device *dev)
922{
923 DEB(DEB_OPEN, printk(KERN_DEBUG
924 "%s: i596_open() irq %d.\n", dev->name, dev->irq));
925
926 if (init_rx_bufs(dev)) {
927 printk(KERN_ERR "%s: Failed to init rx bufs\n", dev->name);
928 return -EAGAIN;
929 }
930 if (init_i596_mem(dev)) {
931 printk(KERN_ERR "%s: Failed to init memory\n", dev->name);
932 goto out_remove_rx_bufs;
933 }
934 netif_start_queue(dev);
935
936 return 0;
937
938out_remove_rx_bufs:
939 remove_rx_bufs(dev);
940 return -EAGAIN;
941}
942
943static void i596_tx_timeout (struct net_device *dev)
944{
945 struct i596_private *lp = netdev_priv(dev);
946
947 /* Transmitter timeout, serious problems. */
948 DEB(DEB_ERRORS, printk(KERN_DEBUG
949 "%s: transmit timed out, status resetting.\n",
950 dev->name));
951
09f75cd7 952 dev->stats.tx_errors++;
2187f287
TB		 953
954 /* Try to restart the adaptor */
09f75cd7 955 if (lp->last_restart == dev->stats.tx_packets) {
2187f287
TB		 956 DEB(DEB_ERRORS, printk(KERN_DEBUG "Resetting board.\n"));
957 /* Shutdown and restart */
958 i596_reset (dev, lp);
959 } else {
960 /* Issue a channel attention signal */
961 DEB(DEB_ERRORS, printk(KERN_DEBUG "Kicking board.\n"));
962 lp->dma->scb.command = SWAP16(CUC_START | RX_START);
963 DMA_WBACK_INV(dev, &(lp->dma->scb), sizeof(struct i596_scb));
964 ca (dev);
09f75cd7 965 lp->last_restart = dev->stats.tx_packets;
2187f287
TB		 966 }
967
968 dev->trans_start = jiffies;
969 netif_wake_queue (dev);
970}
971
972
973static int i596_start_xmit(struct sk_buff *skb, struct net_device *dev)
974{
975 struct i596_private *lp = netdev_priv(dev);
976 struct tx_cmd *tx_cmd;
977 struct i596_tbd *tbd;
978 short length = skb->len;
979 dev->trans_start = jiffies;
980
981 DEB(DEB_STARTTX, printk(KERN_DEBUG
982 "%s: i596_start_xmit(%x,%p) called\n",
983 dev->name, skb->len, skb->data));
984
985 if (length < ETH_ZLEN) {
986 if (skb_padto(skb, ETH_ZLEN))
987 return 0;
988 length = ETH_ZLEN;
989 }
990
991 netif_stop_queue(dev);
992
993 tx_cmd = lp->dma->tx_cmds + lp->next_tx_cmd;
994 tbd = lp->dma->tbds + lp->next_tx_cmd;
995
996 if (tx_cmd->cmd.command) {
997 DEB(DEB_ERRORS, printk(KERN_DEBUG
998 "%s: xmit ring full, dropping packet.\n",
999 dev->name));
09f75cd7 1000 dev->stats.tx_dropped++;
2187f287
TB		 1001
1002 dev_kfree_skb(skb);
1003 } else {
1004 if (++lp->next_tx_cmd == TX_RING_SIZE)
1005 lp->next_tx_cmd = 0;
1006 tx_cmd->tbd = SWAP32(virt_to_dma(lp, tbd));
1007 tbd->next = I596_NULL;
1008
1009 tx_cmd->cmd.command = SWAP16(CMD_FLEX | CmdTx);
1010 tx_cmd->skb = skb;
1011
1012 tx_cmd->pad = 0;
1013 tx_cmd->size = 0;
1014 tbd->pad = 0;
1015 tbd->size = SWAP16(EOF | length);
1016
1017 tx_cmd->dma_addr = dma_map_single(dev->dev.parent, skb->data,
1018 skb->len, DMA_TO_DEVICE);
1019 tbd->data = SWAP32(tx_cmd->dma_addr);
1020
1021 DEB(DEB_TXADDR, print_eth(skb->data, "tx-queued"));
1022 DMA_WBACK_INV(dev, tx_cmd, sizeof(struct tx_cmd));
1023 DMA_WBACK_INV(dev, tbd, sizeof(struct i596_tbd));
1024 i596_add_cmd(dev, &tx_cmd->cmd);
1025
09f75cd7
JG		 1026 dev->stats.tx_packets++;
1027 dev->stats.tx_bytes += length;
2187f287
TB		 1028 }
1029
1030 netif_start_queue(dev);
1031
1032 return 0;
1033}
1034
1035static void print_eth(unsigned char *add, char *str)
1036{
1037 int i;
1038
1039 printk(KERN_DEBUG "i596 0x%p, ", add);
1040 for (i = 0; i < 6; i++)
1041 printk(" %02X", add[i + 6]);
1042 printk(" -->");
1043 for (i = 0; i < 6; i++)
1044 printk(" %02X", add[i]);
1045 printk(" %02X%02X, %s\n", add[12], add[13], str);
1046}
1047
1048static int __devinit i82596_probe(struct net_device *dev)
1049{
1050 int i;
1051 struct i596_private *lp = netdev_priv(dev);
1052 struct i596_dma *dma;
1053
1054 /* This lot is ensure things have been cache line aligned. */
1055 BUILD_BUG_ON(sizeof(struct i596_rfd) != 32);
1056 BUILD_BUG_ON(sizeof(struct i596_rbd) & 31);
1057 BUILD_BUG_ON(sizeof(struct tx_cmd) & 31);
1058 BUILD_BUG_ON(sizeof(struct i596_tbd) != 32);
1059#ifndef __LP64__
1060 BUILD_BUG_ON(sizeof(struct i596_dma) > 4096);
1061#endif
1062
1063 if (!dev->base_addr || !dev->irq)
1064 return -ENODEV;
1065
1066 dma = (struct i596_dma *) DMA_ALLOC(dev->dev.parent,
1067 sizeof(struct i596_dma), &lp->dma_addr, GFP_KERNEL);
1068 if (!dma) {
1069 printk(KERN_ERR "%s: Couldn't get shared memory\n", __FILE__);
1070 return -ENOMEM;
1071 }
1072
1073 /* The 82596-specific entries in the device structure. */
1074 dev->open = i596_open;
1075 dev->stop = i596_close;
1076 dev->hard_start_xmit = i596_start_xmit;
2187f287
TB		 1077 dev->set_multicast_list = set_multicast_list;
1078 dev->tx_timeout = i596_tx_timeout;
1079 dev->watchdog_timeo = TX_TIMEOUT;
1080#ifdef CONFIG_NET_POLL_CONTROLLER
1081 dev->poll_controller = i596_poll_controller;
1082#endif
1083
1084 memset(dma, 0, sizeof(struct i596_dma));
1085 lp->dma = dma;
1086
1087 dma->scb.command = 0;
1088 dma->scb.cmd = I596_NULL;
1089 dma->scb.rfd = I596_NULL;
1090 spin_lock_init(&lp->lock);
1091
1092 DMA_WBACK_INV(dev, dma, sizeof(struct i596_dma));
1093
1094 i = register_netdev(dev);
1095 if (i) {
1096 DMA_FREE(dev->dev.parent, sizeof(struct i596_dma),
1097 (void *)dma, lp->dma_addr);
1098 return i;
1099 };
1100
1101 DEB(DEB_PROBE, printk(KERN_INFO "%s: 82596 at %#3lx,",
1102 dev->name, dev->base_addr));
1103 for (i = 0; i < 6; i++)
1104 DEB(DEB_PROBE, printk(" %2.2X", dev->dev_addr[i]));
1105 DEB(DEB_PROBE, printk(" IRQ %d.\n", dev->irq));
1106 DEB(DEB_INIT, printk(KERN_INFO
1107 "%s: dma at 0x%p (%d bytes), lp->scb at 0x%p\n",
1108 dev->name, dma, (int)sizeof(struct i596_dma),
1109 &dma->scb));
1110
1111 return 0;
1112}
1113
1114#ifdef CONFIG_NET_POLL_CONTROLLER
1115static void i596_poll_controller(struct net_device *dev)
1116{
1117 disable_irq(dev->irq);
1118 i596_interrupt(dev->irq, dev);
1119 enable_irq(dev->irq);
1120}
1121#endif
1122
1123static irqreturn_t i596_interrupt(int irq, void *dev_id)
1124{
1125 struct net_device *dev = dev_id;
1126 struct i596_private *lp;
1127 struct i596_dma *dma;
1128 unsigned short status, ack_cmd = 0;
1129
1130 if (dev == NULL) {
1131 printk(KERN_WARNING "%s: irq %d for unknown device.\n",
1132 __FUNCTION__, irq);
1133 return IRQ_NONE;
1134 }
1135
1136 lp = netdev_priv(dev);
1137 dma = lp->dma;
1138
1139 spin_lock (&lp->lock);
1140
1141 wait_cmd(dev, dma, 100, "i596 interrupt, timeout");
1142 status = SWAP16(dma->scb.status);
1143
1144 DEB(DEB_INTS, printk(KERN_DEBUG
1145 "%s: i596 interrupt, IRQ %d, status %4.4x.\n",
1146 dev->name, irq, status));
1147
1148 ack_cmd = status & 0xf000;
1149
1150 if (!ack_cmd) {
1151 DEB(DEB_ERRORS, printk(KERN_DEBUG
1152 "%s: interrupt with no events\n",
1153 dev->name));
1154 spin_unlock (&lp->lock);
1155 return IRQ_NONE;
1156 }
1157
1158 if ((status & 0x8000) || (status & 0x2000)) {
1159 struct i596_cmd *ptr;
1160
1161 if ((status & 0x8000))
1162 DEB(DEB_INTS,
1163 printk(KERN_DEBUG
1164 "%s: i596 interrupt completed command.\n",
1165 dev->name));
1166 if ((status & 0x2000))
1167 DEB(DEB_INTS,
1168 printk(KERN_DEBUG
1169 "%s: i596 interrupt command unit inactive %x.\n",
1170 dev->name, status & 0x0700));
1171
1172 while (lp->cmd_head != NULL) {
1173 DMA_INV(dev, lp->cmd_head, sizeof(struct i596_cmd));
1174 if (!(lp->cmd_head->status & SWAP16(STAT_C)))
1175 break;
1176
1177 ptr = lp->cmd_head;
1178
1179 DEB(DEB_STATUS,
1180 printk(KERN_DEBUG
1181 "cmd_head->status = %04x, ->command = %04x\n",
1182 SWAP16(lp->cmd_head->status),
1183 SWAP16(lp->cmd_head->command)));
1184 lp->cmd_head = ptr->v_next;
1185 lp->cmd_backlog--;
1186
1187 switch (SWAP16(ptr->command) & 0x7) {
1188 case CmdTx:
1189 {
1190 struct tx_cmd *tx_cmd = (struct tx_cmd *) ptr;
1191 struct sk_buff *skb = tx_cmd->skb;
1192
1193 if (ptr->status & SWAP16(STAT_OK)) {
1194 DEB(DEB_TXADDR,
1195 print_eth(skb->data, "tx-done"));
1196 } else {
09f75cd7 1197 dev->stats.tx_errors++;
2187f287 1198 if (ptr->status & SWAP16(0x0020))
09f75cd7 1199 dev->stats.collisions++;
2187f287 1200 if (!(ptr->status & SWAP16(0x0040)))
09f75cd7 1201 dev->stats.tx_heartbeat_errors++;
2187f287 1202 if (ptr->status & SWAP16(0x0400))
09f75cd7 1203 dev->stats.tx_carrier_errors++;
2187f287 1204 if (ptr->status & SWAP16(0x0800))
09f75cd7 1205 dev->stats.collisions++;
2187f287 1206 if (ptr->status & SWAP16(0x1000))
09f75cd7 1207 dev->stats.tx_aborted_errors++;
2187f287
TB		 1208 }
1209 dma_unmap_single(dev->dev.parent,
1210 tx_cmd->dma_addr,
1211 skb->len, DMA_TO_DEVICE);
1212 dev_kfree_skb_irq(skb);
1213
1214 tx_cmd->cmd.command = 0; /* Mark free */
1215 break;
1216 }
1217 case CmdTDR:
1218 {
1219 unsigned short status = SWAP16(((struct tdr_cmd *)ptr)->status);
1220
1221 if (status & 0x8000) {
1222 DEB(DEB_ANY,
1223 printk(KERN_DEBUG "%s: link ok.\n",
1224 dev->name));
1225 } else {
1226 if (status & 0x4000)
1227 printk(KERN_ERR
1228 "%s: Transceiver problem.\n",
1229 dev->name);
1230 if (status & 0x2000)
1231 printk(KERN_ERR
1232 "%s: Termination problem.\n",
1233 dev->name);
1234 if (status & 0x1000)
1235 printk(KERN_ERR
1236 "%s: Short circuit.\n",
1237 dev->name);
1238
1239 DEB(DEB_TDR,
1240 printk(KERN_DEBUG "%s: Time %d.\n",
1241 dev->name, status & 0x07ff));
1242 }
1243 break;
1244 }
1245 case CmdConfigure:
1246 /*
1247 * Zap command so set_multicast_list() know
1248 * it is free
1249 */
1250 ptr->command = 0;
1251 break;
1252 }
1253 ptr->v_next = NULL;
1254 ptr->b_next = I596_NULL;
1255 DMA_WBACK(dev, ptr, sizeof(struct i596_cmd));
1256 lp->last_cmd = jiffies;
1257 }
1258
1259 /* This mess is arranging that only the last of any outstanding
1260 * commands has the interrupt bit set. Should probably really
1261 * only add to the cmd queue when the CU is stopped.
1262 */
1263 ptr = lp->cmd_head;
1264 while ((ptr != NULL) && (ptr != lp->cmd_tail)) {
1265 struct i596_cmd *prev = ptr;
1266
1267 ptr->command &= SWAP16(0x1fff);
1268 ptr = ptr->v_next;
1269 DMA_WBACK_INV(dev, prev, sizeof(struct i596_cmd));
1270 }
1271
1272 if (lp->cmd_head != NULL)
1273 ack_cmd |= CUC_START;
1274 dma->scb.cmd = SWAP32(virt_to_dma(lp, &lp->cmd_head->status));
1275 DMA_WBACK_INV(dev, &dma->scb, sizeof(struct i596_scb));
1276 }
1277 if ((status & 0x1000) || (status & 0x4000)) {
1278 if ((status & 0x4000))
1279 DEB(DEB_INTS,
1280 printk(KERN_DEBUG
1281 "%s: i596 interrupt received a frame.\n",
1282 dev->name));
1283 i596_rx(dev);
1284 /* Only RX_START if stopped - RGH 07-07-96 */
1285 if (status & 0x1000) {
1286 if (netif_running(dev)) {
1287 DEB(DEB_ERRORS,
1288 printk(KERN_DEBUG
1289 "%s: i596 interrupt receive unit inactive, status 0x%x\n",
1290 dev->name, status));
1291 ack_cmd |= RX_START;
09f75cd7
JG		 1292 dev->stats.rx_errors++;
1293 dev->stats.rx_fifo_errors++;
2187f287
TB		 1294 rebuild_rx_bufs(dev);
1295 }
1296 }
1297 }
1298 wait_cmd(dev, dma, 100, "i596 interrupt, timeout");
1299 dma->scb.command = SWAP16(ack_cmd);
1300 DMA_WBACK(dev, &dma->scb, sizeof(struct i596_scb));
1301
1302 /* DANGER: I suspect that some kind of interrupt
1303 acknowledgement aside from acking the 82596 might be needed
1304 here... but it's running acceptably without */
1305
1306 ca(dev);
1307
1308 wait_cmd(dev, dma, 100, "i596 interrupt, exit timeout");
1309 DEB(DEB_INTS, printk(KERN_DEBUG "%s: exiting interrupt.\n", dev->name));
1310
1311 spin_unlock (&lp->lock);
1312 return IRQ_HANDLED;
1313}
1314
1315static int i596_close(struct net_device *dev)
1316{
1317 struct i596_private *lp = netdev_priv(dev);
1318 unsigned long flags;
1319
1320 netif_stop_queue(dev);
1321
1322 DEB(DEB_INIT,
1323 printk(KERN_DEBUG
1324 "%s: Shutting down ethercard, status was %4.4x.\n",
1325 dev->name, SWAP16(lp->dma->scb.status)));
1326
1327 spin_lock_irqsave(&lp->lock, flags);
1328
1329 wait_cmd(dev, lp->dma, 100, "close1 timed out");
1330 lp->dma->scb.command = SWAP16(CUC_ABORT | RX_ABORT);
1331 DMA_WBACK(dev, &lp->dma->scb, sizeof(struct i596_scb));
1332
1333 ca(dev);
1334
1335 wait_cmd(dev, lp->dma, 100, "close2 timed out");
1336 spin_unlock_irqrestore(&lp->lock, flags);
1337 DEB(DEB_STRUCT, i596_display_data(dev));
1338 i596_cleanup_cmd(dev, lp);
1339
1340 free_irq(dev->irq, dev);
1341 remove_rx_bufs(dev);
1342
1343 return 0;
1344}
1345
2187f287
TB		 1346/*
1347 * Set or clear the multicast filter for this adaptor.
1348 */
1349
1350static void set_multicast_list(struct net_device *dev)
1351{
1352 struct i596_private *lp = netdev_priv(dev);
1353 struct i596_dma *dma = lp->dma;
1354 int config = 0, cnt;
1355
1356 DEB(DEB_MULTI,
1357 printk(KERN_DEBUG
1358 "%s: set multicast list, %d entries, promisc %s, allmulti %s\n",
1359 dev->name, dev->mc_count,
1360 dev->flags & IFF_PROMISC ? "ON" : "OFF",
1361 dev->flags & IFF_ALLMULTI ? "ON" : "OFF"));
1362
1363 if ((dev->flags & IFF_PROMISC) &&
1364 !(dma->cf_cmd.i596_config[8] & 0x01)) {
1365 dma->cf_cmd.i596_config[8] |= 0x01;
1366 config = 1;
1367 }
1368 if (!(dev->flags & IFF_PROMISC) &&
1369 (dma->cf_cmd.i596_config[8] & 0x01)) {
1370 dma->cf_cmd.i596_config[8] &= ~0x01;
1371 config = 1;
1372 }
1373 if ((dev->flags & IFF_ALLMULTI) &&
1374 (dma->cf_cmd.i596_config[11] & 0x20)) {
1375 dma->cf_cmd.i596_config[11] &= ~0x20;
1376 config = 1;
1377 }
1378 if (!(dev->flags & IFF_ALLMULTI) &&
1379 !(dma->cf_cmd.i596_config[11] & 0x20)) {
1380 dma->cf_cmd.i596_config[11] |= 0x20;
1381 config = 1;
1382 }
1383 if (config) {
1384 if (dma->cf_cmd.cmd.command)
1385 printk(KERN_INFO
1386 "%s: config change request already queued\n",
1387 dev->name);
1388 else {
1389 dma->cf_cmd.cmd.command = SWAP16(CmdConfigure);
1390 DMA_WBACK_INV(dev, &dma->cf_cmd, sizeof(struct cf_cmd));
1391 i596_add_cmd(dev, &dma->cf_cmd.cmd);
1392 }
1393 }
1394
1395 cnt = dev->mc_count;
1396 if (cnt > MAX_MC_CNT) {
1397 cnt = MAX_MC_CNT;
1398 printk(KERN_NOTICE "%s: Only %d multicast addresses supported",
1399 dev->name, cnt);
1400 }
1401
1402 if (dev->mc_count > 0) {
1403 struct dev_mc_list *dmi;
1404 unsigned char *cp;
1405 struct mc_cmd *cmd;
1406
1407 cmd = &dma->mc_cmd;
1408 cmd->cmd.command = SWAP16(CmdMulticastList);
1409 cmd->mc_cnt = SWAP16(dev->mc_count * 6);
1410 cp = cmd->mc_addrs;
1411 for (dmi = dev->mc_list;
1412 cnt && dmi != NULL;
1413 dmi = dmi->next, cnt--, cp += 6) {
1414 memcpy(cp, dmi->dmi_addr, 6);
1415 if (i596_debug > 1)
1416 DEB(DEB_MULTI,
1417 printk(KERN_DEBUG
1418 "%s: Adding address %02x:%02x:%02x:%02x:%02x:%02x\n",
1419 dev->name, cp[0], cp[1], cp[2], cp[3], cp[4], cp[5]));
1420 }
1421 DMA_WBACK_INV(dev, &dma->mc_cmd, sizeof(struct mc_cmd));
1422 i596_add_cmd(dev, &cmd->cmd);
1423 }
1424}
Linux kernel - Deliverables
This page took 0.11636 seconds and 5 git commands to generate.