1 | // SPDX-License-Identifier: GPL-1.0+ |
2 | /* lasi_82596.c -- driver for the intel 82596 ethernet controller, as |
3 | munged into HPPA boxen . |
4 | |
5 | This driver is based upon 82596.c, original credits are below... |
6 | but there were too many hoops which HP wants jumped through to |
7 | keep this code in there in a sane manner. |
8 | |
9 | 3 primary sources of the mess -- |
10 | 1) hppa needs *lots* of cacheline flushing to keep this kind of |
11 | MMIO running. |
12 | |
13 | 2) The 82596 needs to see all of its pointers as their physical |
14 | address. Thus virt_to_bus/bus_to_virt are *everywhere*. |
15 | |
16 | 3) The implementation HP is using seems to be significantly pickier |
17 | about when and how the command and RX units are started. some |
18 | command ordering was changed. |
19 | |
20 | Examination of the mach driver leads one to believe that there |
21 | might be a saner way to pull this off... anyone who feels like a |
22 | full rewrite can be my guest. |
23 | |
24 | Split 02/13/2000 Sam Creasey (sammy@oh.verio.com) |
25 | |
26 | 02/01/2000 Initial modifications for parisc by Helge Deller (deller@gmx.de) |
27 | 03/02/2000 changes for better/correct(?) cache-flushing (deller) |
28 | */ |
29 | |
30 | /* 82596.c: A generic 82596 ethernet driver for linux. */ |
31 | /* |
32 | Based on Apricot.c |
33 | Written 1994 by Mark Evans. |
34 | This driver is for the Apricot 82596 bus-master interface |
35 | |
36 | Modularised 12/94 Mark Evans |
37 | |
38 | |
39 | Modified to support the 82596 ethernet chips on 680x0 VME boards. |
40 | by Richard Hirst <richard@sleepie.demon.co.uk> |
41 | Renamed to be 82596.c |
42 | |
43 | 980825: Changed to receive directly in to sk_buffs which are |
44 | allocated at open() time. Eliminates copy on incoming frames |
45 | (small ones are still copied). Shared data now held in a |
46 | non-cached page, so we can run on 68060 in copyback mode. |
47 | |
48 | TBD: |
49 | * look at deferring rx frames rather than discarding (as per tulip) |
50 | * handle tx ring full as per tulip |
51 | * performance test to tune rx_copybreak |
52 | |
53 | Most of my modifications relate to the braindead big-endian |
54 | implementation by Intel. When the i596 is operating in |
55 | 'big-endian' mode, it thinks a 32 bit value of 0x12345678 |
56 | should be stored as 0x56781234. This is a real pain, when |
57 | you have linked lists which are shared by the 680x0 and the |
58 | i596. |
59 | |
60 | Driver skeleton |
61 | Written 1993 by Donald Becker. |
62 | Copyright 1993 United States Government as represented by the Director, |
63 | National Security Agency. |
64 | |
65 | The author may be reached as becker@scyld.com, or C/O |
66 | Scyld Computing Corporation, 410 Severn Ave., Suite 210, Annapolis MD 21403 |
67 | |
68 | */ |
69 | |
70 | #include <linux/module.h> |
71 | #include <linux/kernel.h> |
72 | #include <linux/string.h> |
73 | #include <linux/errno.h> |
74 | #include <linux/ioport.h> |
75 | #include <linux/interrupt.h> |
76 | #include <linux/delay.h> |
77 | #include <linux/netdevice.h> |
78 | #include <linux/etherdevice.h> |
79 | #include <linux/skbuff.h> |
80 | #include <linux/types.h> |
81 | #include <linux/bitops.h> |
82 | #include <linux/dma-mapping.h> |
83 | #include <linux/io.h> |
84 | #include <linux/irq.h> |
85 | #include <linux/gfp.h> |
86 | |
87 | /* DEBUG flags |
88 | */ |
89 | |
90 | #define DEB_INIT 0x0001 |
91 | #define DEB_PROBE 0x0002 |
92 | #define DEB_SERIOUS 0x0004 |
93 | #define DEB_ERRORS 0x0008 |
94 | #define DEB_MULTI 0x0010 |
95 | #define DEB_TDR 0x0020 |
96 | #define DEB_OPEN 0x0040 |
97 | #define DEB_RESET 0x0080 |
98 | #define DEB_ADDCMD 0x0100 |
99 | #define DEB_STATUS 0x0200 |
100 | #define DEB_STARTTX 0x0400 |
101 | #define DEB_RXADDR 0x0800 |
102 | #define DEB_TXADDR 0x1000 |
103 | #define DEB_RXFRAME 0x2000 |
104 | #define DEB_INTS 0x4000 |
105 | #define DEB_STRUCT 0x8000 |
106 | #define DEB_ANY 0xffff |
107 | |
108 | |
109 | #define DEB(x, y) if (i596_debug & (x)) { y; } |
110 | |
111 | |
112 | /* |
113 | * The MPU_PORT command allows direct access to the 82596. With PORT access |
114 | * the following commands are available (p5-18). The 32-bit port command |
115 | * must be word-swapped with the most significant word written first. |
116 | * This only applies to VME boards. |
117 | */ |
118 | #define PORT_RESET 0x00 /* reset 82596 */ |
119 | #define PORT_SELFTEST 0x01 /* selftest */ |
120 | #define PORT_ALTSCP 0x02 /* alternate SCB address */ |
121 | #define PORT_ALTDUMP 0x03 /* Alternate DUMP address */ |
122 | |
123 | static int i596_debug = (DEB_SERIOUS|DEB_PROBE); |
124 | |
125 | /* Copy frames shorter than rx_copybreak, otherwise pass on up in |
126 | * a full sized sk_buff. Value of 100 stolen from tulip.c (!alpha). |
127 | */ |
128 | static int rx_copybreak = 100; |
129 | |
130 | #define PKT_BUF_SZ 1536 |
131 | #define MAX_MC_CNT 64 |
132 | |
133 | #define ISCP_BUSY 0x0001 |
134 | |
135 | #define I596_NULL ((u32)0xffffffff) |
136 | |
137 | #define CMD_EOL 0x8000 /* The last command of the list, stop. */ |
138 | #define CMD_SUSP 0x4000 /* Suspend after doing cmd. */ |
139 | #define CMD_INTR 0x2000 /* Interrupt after doing cmd. */ |
140 | |
141 | #define CMD_FLEX 0x0008 /* Enable flexible memory model */ |
142 | |
143 | enum commands { |
144 | CmdNOp = 0, CmdSASetup = 1, CmdConfigure = 2, CmdMulticastList = 3, |
145 | CmdTx = 4, CmdTDR = 5, CmdDump = 6, CmdDiagnose = 7 |
146 | }; |
147 | |
148 | #define STAT_C 0x8000 /* Set to 0 after execution */ |
149 | #define STAT_B 0x4000 /* Command being executed */ |
150 | #define STAT_OK 0x2000 /* Command executed ok */ |
151 | #define STAT_A 0x1000 /* Command aborted */ |
152 | |
153 | #define CUC_START 0x0100 |
154 | #define CUC_RESUME 0x0200 |
155 | #define CUC_SUSPEND 0x0300 |
156 | #define CUC_ABORT 0x0400 |
157 | #define RX_START 0x0010 |
158 | #define RX_RESUME 0x0020 |
159 | #define RX_SUSPEND 0x0030 |
160 | #define RX_ABORT 0x0040 |
161 | |
162 | #define TX_TIMEOUT (HZ/20) |
163 | |
164 | |
165 | struct i596_reg { |
166 | unsigned short porthi; |
167 | unsigned short portlo; |
168 | u32 ca; |
169 | }; |
170 | |
171 | #define EOF 0x8000 |
172 | #define SIZE_MASK 0x3fff |
173 | |
174 | struct i596_tbd { |
175 | unsigned short size; |
176 | unsigned short pad; |
177 | u32 next; |
178 | u32 data; |
179 | u32 cache_pad[5]; /* Total 32 bytes... */ |
180 | }; |
181 | |
182 | /* The command structure has two 'next' pointers; v_next is the address of |
183 | * the next command as seen by the CPU, b_next is the address of the next |
184 | * command as seen by the 82596. The b_next pointer, as used by the 82596 |
185 | * always references the status field of the next command, rather than the |
186 | * v_next field, because the 82596 is unaware of v_next. It may seem more |
187 | * logical to put v_next at the end of the structure, but we cannot do that |
188 | * because the 82596 expects other fields to be there, depending on command |
189 | * type. |
190 | */ |
191 | |
192 | struct i596_cmd { |
193 | struct i596_cmd *v_next; /* Address from CPUs viewpoint */ |
194 | unsigned short status; |
195 | unsigned short command; |
196 | u32 b_next; /* Address from i596 viewpoint */ |
197 | }; |
198 | |
199 | struct tx_cmd { |
200 | struct i596_cmd cmd; |
201 | u32 tbd; |
202 | unsigned short size; |
203 | unsigned short pad; |
204 | struct sk_buff *skb; /* So we can free it after tx */ |
205 | dma_addr_t dma_addr; |
206 | #ifdef __LP64__ |
207 | u32 cache_pad[6]; /* Total 64 bytes... */ |
208 | #else |
209 | u32 cache_pad[1]; /* Total 32 bytes... */ |
210 | #endif |
211 | }; |
212 | |
213 | struct tdr_cmd { |
214 | struct i596_cmd cmd; |
215 | unsigned short status; |
216 | unsigned short pad; |
217 | }; |
218 | |
219 | struct mc_cmd { |
220 | struct i596_cmd cmd; |
221 | short mc_cnt; |
222 | char mc_addrs[MAX_MC_CNT*6]; |
223 | }; |
224 | |
225 | struct sa_cmd { |
226 | struct i596_cmd cmd; |
227 | char eth_addr[8]; |
228 | }; |
229 | |
230 | struct cf_cmd { |
231 | struct i596_cmd cmd; |
232 | char i596_config[16]; |
233 | }; |
234 | |
235 | struct i596_rfd { |
236 | unsigned short stat; |
237 | unsigned short cmd; |
238 | u32 b_next; /* Address from i596 viewpoint */ |
239 | u32 rbd; |
240 | unsigned short count; |
241 | unsigned short size; |
242 | struct i596_rfd *v_next; /* Address from CPUs viewpoint */ |
243 | struct i596_rfd *v_prev; |
244 | #ifndef __LP64__ |
245 | u32 cache_pad[2]; /* Total 32 bytes... */ |
246 | #endif |
247 | }; |
248 | |
249 | struct i596_rbd { |
250 | /* hardware data */ |
251 | unsigned short count; |
252 | unsigned short zero1; |
253 | u32 b_next; |
254 | u32 b_data; /* Address from i596 viewpoint */ |
255 | unsigned short size; |
256 | unsigned short zero2; |
257 | /* driver data */ |
258 | struct sk_buff *skb; |
259 | struct i596_rbd *v_next; |
260 | u32 b_addr; /* This rbd addr from i596 view */ |
261 | unsigned char *v_data; /* Address from CPUs viewpoint */ |
262 | /* Total 32 bytes... */ |
263 | #ifdef __LP64__ |
264 | u32 cache_pad[4]; |
265 | #endif |
266 | }; |
267 | |
268 | /* These values as chosen so struct i596_dma fits in one page... */ |
269 | |
270 | #define TX_RING_SIZE 32 |
271 | #define RX_RING_SIZE 16 |
272 | |
273 | struct i596_scb { |
274 | unsigned short status; |
275 | unsigned short command; |
276 | u32 cmd; |
277 | u32 rfd; |
278 | u32 crc_err; |
279 | u32 align_err; |
280 | u32 resource_err; |
281 | u32 over_err; |
282 | u32 rcvdt_err; |
283 | u32 short_err; |
284 | unsigned short t_on; |
285 | unsigned short t_off; |
286 | }; |
287 | |
288 | struct i596_iscp { |
289 | u32 stat; |
290 | u32 scb; |
291 | }; |
292 | |
293 | struct i596_scp { |
294 | u32 sysbus; |
295 | u32 pad; |
296 | u32 iscp; |
297 | }; |
298 | |
299 | struct i596_dma { |
300 | struct i596_scp scp __attribute__((aligned(32))); |
301 | volatile struct i596_iscp iscp __attribute__((aligned(32))); |
302 | volatile struct i596_scb scb __attribute__((aligned(32))); |
303 | struct sa_cmd sa_cmd __attribute__((aligned(32))); |
304 | struct cf_cmd cf_cmd __attribute__((aligned(32))); |
305 | struct tdr_cmd tdr_cmd __attribute__((aligned(32))); |
306 | struct mc_cmd mc_cmd __attribute__((aligned(32))); |
307 | struct i596_rfd rfds[RX_RING_SIZE] __attribute__((aligned(32))); |
308 | struct i596_rbd rbds[RX_RING_SIZE] __attribute__((aligned(32))); |
309 | struct tx_cmd tx_cmds[TX_RING_SIZE] __attribute__((aligned(32))); |
310 | struct i596_tbd tbds[TX_RING_SIZE] __attribute__((aligned(32))); |
311 | }; |
312 | |
313 | struct i596_private { |
314 | struct i596_dma *dma; |
315 | u32 stat; |
316 | int last_restart; |
317 | struct i596_rfd *rfd_head; |
318 | struct i596_rbd *rbd_head; |
319 | struct i596_cmd *cmd_tail; |
320 | struct i596_cmd *cmd_head; |
321 | int cmd_backlog; |
322 | u32 last_cmd; |
323 | int next_tx_cmd; |
324 | int options; |
325 | spinlock_t lock; /* serialize access to chip */ |
326 | dma_addr_t dma_addr; |
327 | void __iomem *mpu_port; |
328 | void __iomem *ca; |
329 | }; |
330 | |
331 | static const char init_setup[] = |
332 | { |
333 | 0x8E, /* length, prefetch on */ |
334 | 0xC8, /* fifo to 8, monitor off */ |
335 | 0x80, /* don't save bad frames */ |
336 | 0x2E, /* No source address insertion, 8 byte preamble */ |
337 | 0x00, /* priority and backoff defaults */ |
338 | 0x60, /* interframe spacing */ |
339 | 0x00, /* slot time LSB */ |
340 | 0xf2, /* slot time and retries */ |
341 | 0x00, /* promiscuous mode */ |
342 | 0x00, /* collision detect */ |
343 | 0x40, /* minimum frame length */ |
344 | 0xff, |
345 | 0x00, |
346 | 0x7f /* *multi IA */ }; |
347 | |
348 | static int i596_open(struct net_device *dev); |
349 | static netdev_tx_t i596_start_xmit(struct sk_buff *skb, struct net_device *dev); |
350 | static irqreturn_t i596_interrupt(int irq, void *dev_id); |
351 | static int i596_close(struct net_device *dev); |
352 | static void i596_add_cmd(struct net_device *dev, struct i596_cmd *cmd); |
353 | static void i596_tx_timeout (struct net_device *dev, unsigned int txqueue); |
354 | static void print_eth(unsigned char *buf, char *str); |
355 | static void set_multicast_list(struct net_device *dev); |
356 | static inline void ca(struct net_device *dev); |
357 | static void mpu_port(struct net_device *dev, int c, dma_addr_t x); |
358 | |
359 | static int rx_ring_size = RX_RING_SIZE; |
360 | static int ticks_limit = 100; |
361 | static int max_cmd_backlog = TX_RING_SIZE-1; |
362 | |
363 | #ifdef CONFIG_NET_POLL_CONTROLLER |
364 | static void i596_poll_controller(struct net_device *dev); |
365 | #endif |
366 | |
367 | static inline dma_addr_t virt_to_dma(struct i596_private *lp, volatile void *v) |
368 | { |
369 | return lp->dma_addr + ((unsigned long)v - (unsigned long)lp->dma); |
370 | } |
371 | |
372 | #ifdef NONCOHERENT_DMA |
373 | static inline void dma_sync_dev(struct net_device *ndev, volatile void *addr, |
374 | size_t len) |
375 | { |
376 | dma_sync_single_for_device(dev: ndev->dev.parent, |
377 | addr: virt_to_dma(lp: netdev_priv(dev: ndev), v: addr), size: len, |
378 | dir: DMA_BIDIRECTIONAL); |
379 | } |
380 | |
381 | static inline void dma_sync_cpu(struct net_device *ndev, volatile void *addr, |
382 | size_t len) |
383 | { |
384 | dma_sync_single_for_cpu(dev: ndev->dev.parent, |
385 | addr: virt_to_dma(lp: netdev_priv(dev: ndev), v: addr), size: len, |
386 | dir: DMA_BIDIRECTIONAL); |
387 | } |
388 | #else |
389 | static inline void dma_sync_dev(struct net_device *ndev, volatile void *addr, |
390 | size_t len) |
391 | { |
392 | } |
393 | static inline void dma_sync_cpu(struct net_device *ndev, volatile void *addr, |
394 | size_t len) |
395 | { |
396 | } |
397 | #endif /* NONCOHERENT_DMA */ |
398 | |
399 | static inline int wait_istat(struct net_device *dev, struct i596_dma *dma, int delcnt, char *str) |
400 | { |
401 | dma_sync_cpu(ndev: dev, addr: &(dma->iscp), len: sizeof(struct i596_iscp)); |
402 | while (--delcnt && dma->iscp.stat) { |
403 | udelay(10); |
404 | dma_sync_cpu(ndev: dev, addr: &(dma->iscp), len: sizeof(struct i596_iscp)); |
405 | } |
406 | if (!delcnt) { |
407 | printk(KERN_ERR "%s: %s, iscp.stat %04x, didn't clear\n" , |
408 | dev->name, str, SWAP16(dma->iscp.stat)); |
409 | return -1; |
410 | } else |
411 | return 0; |
412 | } |
413 | |
414 | |
415 | static inline int wait_cmd(struct net_device *dev, struct i596_dma *dma, int delcnt, char *str) |
416 | { |
417 | dma_sync_cpu(ndev: dev, addr: &(dma->scb), len: sizeof(struct i596_scb)); |
418 | while (--delcnt && dma->scb.command) { |
419 | udelay(10); |
420 | dma_sync_cpu(ndev: dev, addr: &(dma->scb), len: sizeof(struct i596_scb)); |
421 | } |
422 | if (!delcnt) { |
423 | printk(KERN_ERR "%s: %s, status %4.4x, cmd %4.4x.\n" , |
424 | dev->name, str, |
425 | SWAP16(dma->scb.status), |
426 | SWAP16(dma->scb.command)); |
427 | return -1; |
428 | } else |
429 | return 0; |
430 | } |
431 | |
432 | |
433 | static void i596_display_data(struct net_device *dev) |
434 | { |
435 | struct i596_private *lp = netdev_priv(dev); |
436 | struct i596_dma *dma = lp->dma; |
437 | struct i596_cmd *cmd; |
438 | struct i596_rfd *rfd; |
439 | struct i596_rbd *rbd; |
440 | |
441 | printk(KERN_DEBUG "lp and scp at %p, .sysbus = %08x, .iscp = %08x\n" , |
442 | &dma->scp, dma->scp.sysbus, SWAP32(dma->scp.iscp)); |
443 | printk(KERN_DEBUG "iscp at %p, iscp.stat = %08x, .scb = %08x\n" , |
444 | &dma->iscp, SWAP32(dma->iscp.stat), SWAP32(dma->iscp.scb)); |
445 | printk(KERN_DEBUG "scb at %p, scb.status = %04x, .command = %04x," |
446 | " .cmd = %08x, .rfd = %08x\n" , |
447 | &dma->scb, SWAP16(dma->scb.status), SWAP16(dma->scb.command), |
448 | SWAP16(dma->scb.cmd), SWAP32(dma->scb.rfd)); |
449 | printk(KERN_DEBUG " errors: crc %x, align %x, resource %x," |
450 | " over %x, rcvdt %x, short %x\n" , |
451 | SWAP32(dma->scb.crc_err), SWAP32(dma->scb.align_err), |
452 | SWAP32(dma->scb.resource_err), SWAP32(dma->scb.over_err), |
453 | SWAP32(dma->scb.rcvdt_err), SWAP32(dma->scb.short_err)); |
454 | cmd = lp->cmd_head; |
455 | while (cmd != NULL) { |
456 | printk(KERN_DEBUG |
457 | "cmd at %p, .status = %04x, .command = %04x," |
458 | " .b_next = %08x\n" , |
459 | cmd, SWAP16(cmd->status), SWAP16(cmd->command), |
460 | SWAP32(cmd->b_next)); |
461 | cmd = cmd->v_next; |
462 | } |
463 | rfd = lp->rfd_head; |
464 | printk(KERN_DEBUG "rfd_head = %p\n" , rfd); |
465 | do { |
466 | printk(KERN_DEBUG |
467 | " %p .stat %04x, .cmd %04x, b_next %08x, rbd %08x," |
468 | " count %04x\n" , |
469 | rfd, SWAP16(rfd->stat), SWAP16(rfd->cmd), |
470 | SWAP32(rfd->b_next), SWAP32(rfd->rbd), |
471 | SWAP16(rfd->count)); |
472 | rfd = rfd->v_next; |
473 | } while (rfd != lp->rfd_head); |
474 | rbd = lp->rbd_head; |
475 | printk(KERN_DEBUG "rbd_head = %p\n" , rbd); |
476 | do { |
477 | printk(KERN_DEBUG |
478 | " %p .count %04x, b_next %08x, b_data %08x," |
479 | " size %04x\n" , |
480 | rbd, SWAP16(rbd->count), SWAP32(rbd->b_next), |
481 | SWAP32(rbd->b_data), SWAP16(rbd->size)); |
482 | rbd = rbd->v_next; |
483 | } while (rbd != lp->rbd_head); |
484 | dma_sync_cpu(ndev: dev, addr: dma, len: sizeof(struct i596_dma)); |
485 | } |
486 | |
487 | static inline int init_rx_bufs(struct net_device *dev) |
488 | { |
489 | struct i596_private *lp = netdev_priv(dev); |
490 | struct i596_dma *dma = lp->dma; |
491 | int i; |
492 | struct i596_rfd *rfd; |
493 | struct i596_rbd *rbd; |
494 | |
495 | /* First build the Receive Buffer Descriptor List */ |
496 | |
497 | for (i = 0, rbd = dma->rbds; i < rx_ring_size; i++, rbd++) { |
498 | dma_addr_t dma_addr; |
499 | struct sk_buff *skb; |
500 | |
501 | skb = netdev_alloc_skb_ip_align(dev, PKT_BUF_SZ); |
502 | if (skb == NULL) |
503 | return -1; |
504 | dma_addr = dma_map_single(dev->dev.parent, skb->data, |
505 | PKT_BUF_SZ, DMA_FROM_DEVICE); |
506 | rbd->v_next = rbd+1; |
507 | rbd->b_next = SWAP32(virt_to_dma(lp, rbd+1)); |
508 | rbd->b_addr = SWAP32(virt_to_dma(lp, rbd)); |
509 | rbd->skb = skb; |
510 | rbd->v_data = skb->data; |
511 | rbd->b_data = SWAP32(dma_addr); |
512 | rbd->size = SWAP16(PKT_BUF_SZ); |
513 | } |
514 | lp->rbd_head = dma->rbds; |
515 | rbd = dma->rbds + rx_ring_size - 1; |
516 | rbd->v_next = dma->rbds; |
517 | rbd->b_next = SWAP32(virt_to_dma(lp, dma->rbds)); |
518 | |
519 | /* Now build the Receive Frame Descriptor List */ |
520 | |
521 | for (i = 0, rfd = dma->rfds; i < rx_ring_size; i++, rfd++) { |
522 | rfd->rbd = I596_NULL; |
523 | rfd->v_next = rfd+1; |
524 | rfd->v_prev = rfd-1; |
525 | rfd->b_next = SWAP32(virt_to_dma(lp, rfd+1)); |
526 | rfd->cmd = SWAP16(CMD_FLEX); |
527 | } |
528 | lp->rfd_head = dma->rfds; |
529 | dma->scb.rfd = SWAP32(virt_to_dma(lp, dma->rfds)); |
530 | rfd = dma->rfds; |
531 | rfd->rbd = SWAP32(virt_to_dma(lp, lp->rbd_head)); |
532 | rfd->v_prev = dma->rfds + rx_ring_size - 1; |
533 | rfd = dma->rfds + rx_ring_size - 1; |
534 | rfd->v_next = dma->rfds; |
535 | rfd->b_next = SWAP32(virt_to_dma(lp, dma->rfds)); |
536 | rfd->cmd = SWAP16(CMD_EOL|CMD_FLEX); |
537 | |
538 | dma_sync_dev(ndev: dev, addr: dma, len: sizeof(struct i596_dma)); |
539 | return 0; |
540 | } |
541 | |
542 | static inline void remove_rx_bufs(struct net_device *dev) |
543 | { |
544 | struct i596_private *lp = netdev_priv(dev); |
545 | struct i596_rbd *rbd; |
546 | int i; |
547 | |
548 | for (i = 0, rbd = lp->dma->rbds; i < rx_ring_size; i++, rbd++) { |
549 | if (rbd->skb == NULL) |
550 | break; |
551 | dma_unmap_single(dev->dev.parent, |
552 | (dma_addr_t)SWAP32(rbd->b_data), |
553 | PKT_BUF_SZ, DMA_FROM_DEVICE); |
554 | dev_kfree_skb(rbd->skb); |
555 | } |
556 | } |
557 | |
558 | |
559 | static void rebuild_rx_bufs(struct net_device *dev) |
560 | { |
561 | struct i596_private *lp = netdev_priv(dev); |
562 | struct i596_dma *dma = lp->dma; |
563 | int i; |
564 | |
565 | /* Ensure rx frame/buffer descriptors are tidy */ |
566 | |
567 | for (i = 0; i < rx_ring_size; i++) { |
568 | dma->rfds[i].rbd = I596_NULL; |
569 | dma->rfds[i].cmd = SWAP16(CMD_FLEX); |
570 | } |
571 | dma->rfds[rx_ring_size-1].cmd = SWAP16(CMD_EOL|CMD_FLEX); |
572 | lp->rfd_head = dma->rfds; |
573 | dma->scb.rfd = SWAP32(virt_to_dma(lp, dma->rfds)); |
574 | lp->rbd_head = dma->rbds; |
575 | dma->rfds[0].rbd = SWAP32(virt_to_dma(lp, dma->rbds)); |
576 | |
577 | dma_sync_dev(ndev: dev, addr: dma, len: sizeof(struct i596_dma)); |
578 | } |
579 | |
580 | |
581 | static int init_i596_mem(struct net_device *dev) |
582 | { |
583 | struct i596_private *lp = netdev_priv(dev); |
584 | struct i596_dma *dma = lp->dma; |
585 | unsigned long flags; |
586 | |
587 | mpu_port(dev, PORT_RESET, x: 0); |
588 | udelay(100); /* Wait 100us - seems to help */ |
589 | |
590 | /* change the scp address */ |
591 | |
592 | lp->last_cmd = jiffies; |
593 | |
594 | dma->scp.sysbus = SYSBUS; |
595 | dma->scp.iscp = SWAP32(virt_to_dma(lp, &(dma->iscp))); |
596 | dma->iscp.scb = SWAP32(virt_to_dma(lp, &(dma->scb))); |
597 | dma->iscp.stat = SWAP32(ISCP_BUSY); |
598 | lp->cmd_backlog = 0; |
599 | |
600 | lp->cmd_head = NULL; |
601 | dma->scb.cmd = I596_NULL; |
602 | |
603 | DEB(DEB_INIT, printk(KERN_DEBUG "%s: starting i82596.\n" , dev->name)); |
604 | |
605 | dma_sync_dev(ndev: dev, addr: &(dma->scp), len: sizeof(struct i596_scp)); |
606 | dma_sync_dev(ndev: dev, addr: &(dma->iscp), len: sizeof(struct i596_iscp)); |
607 | dma_sync_dev(ndev: dev, addr: &(dma->scb), len: sizeof(struct i596_scb)); |
608 | |
609 | mpu_port(dev, PORT_ALTSCP, x: virt_to_dma(lp, v: &dma->scp)); |
610 | ca(dev); |
611 | if (wait_istat(dev, dma, delcnt: 1000, str: "initialization timed out" )) |
612 | goto failed; |
613 | DEB(DEB_INIT, printk(KERN_DEBUG |
614 | "%s: i82596 initialization successful\n" , |
615 | dev->name)); |
616 | |
617 | if (request_irq(irq: dev->irq, handler: i596_interrupt, flags: 0, name: "i82596" , dev)) { |
618 | printk(KERN_ERR "%s: IRQ %d not free\n" , dev->name, dev->irq); |
619 | goto failed; |
620 | } |
621 | |
622 | /* Ensure rx frame/buffer descriptors are tidy */ |
623 | rebuild_rx_bufs(dev); |
624 | |
625 | dma->scb.command = 0; |
626 | dma_sync_dev(ndev: dev, addr: &(dma->scb), len: sizeof(struct i596_scb)); |
627 | |
628 | DEB(DEB_INIT, printk(KERN_DEBUG |
629 | "%s: queuing CmdConfigure\n" , dev->name)); |
630 | memcpy(dma->cf_cmd.i596_config, init_setup, 14); |
631 | dma->cf_cmd.cmd.command = SWAP16(CmdConfigure); |
632 | dma_sync_dev(ndev: dev, addr: &(dma->cf_cmd), len: sizeof(struct cf_cmd)); |
633 | i596_add_cmd(dev, cmd: &dma->cf_cmd.cmd); |
634 | |
635 | DEB(DEB_INIT, printk(KERN_DEBUG "%s: queuing CmdSASetup\n" , dev->name)); |
636 | memcpy(dma->sa_cmd.eth_addr, dev->dev_addr, ETH_ALEN); |
637 | dma->sa_cmd.cmd.command = SWAP16(CmdSASetup); |
638 | dma_sync_dev(ndev: dev, addr: &(dma->sa_cmd), len: sizeof(struct sa_cmd)); |
639 | i596_add_cmd(dev, cmd: &dma->sa_cmd.cmd); |
640 | |
641 | DEB(DEB_INIT, printk(KERN_DEBUG "%s: queuing CmdTDR\n" , dev->name)); |
642 | dma->tdr_cmd.cmd.command = SWAP16(CmdTDR); |
643 | dma_sync_dev(ndev: dev, addr: &(dma->tdr_cmd), len: sizeof(struct tdr_cmd)); |
644 | i596_add_cmd(dev, cmd: &dma->tdr_cmd.cmd); |
645 | |
646 | spin_lock_irqsave (&lp->lock, flags); |
647 | |
648 | if (wait_cmd(dev, dma, delcnt: 1000, str: "timed out waiting to issue RX_START" )) { |
649 | spin_unlock_irqrestore (lock: &lp->lock, flags); |
650 | goto failed_free_irq; |
651 | } |
652 | DEB(DEB_INIT, printk(KERN_DEBUG "%s: Issuing RX_START\n" , dev->name)); |
653 | dma->scb.command = SWAP16(RX_START); |
654 | dma->scb.rfd = SWAP32(virt_to_dma(lp, dma->rfds)); |
655 | dma_sync_dev(ndev: dev, addr: &(dma->scb), len: sizeof(struct i596_scb)); |
656 | |
657 | ca(dev); |
658 | |
659 | spin_unlock_irqrestore (lock: &lp->lock, flags); |
660 | if (wait_cmd(dev, dma, delcnt: 1000, str: "RX_START not processed" )) |
661 | goto failed_free_irq; |
662 | DEB(DEB_INIT, printk(KERN_DEBUG |
663 | "%s: Receive unit started OK\n" , dev->name)); |
664 | return 0; |
665 | |
666 | failed_free_irq: |
667 | free_irq(dev->irq, dev); |
668 | failed: |
669 | printk(KERN_ERR "%s: Failed to initialise 82596\n" , dev->name); |
670 | mpu_port(dev, PORT_RESET, x: 0); |
671 | return -1; |
672 | } |
673 | |
674 | |
675 | static inline int i596_rx(struct net_device *dev) |
676 | { |
677 | struct i596_private *lp = netdev_priv(dev); |
678 | struct i596_rfd *rfd; |
679 | struct i596_rbd *rbd; |
680 | int frames = 0; |
681 | |
682 | DEB(DEB_RXFRAME, printk(KERN_DEBUG |
683 | "i596_rx(), rfd_head %p, rbd_head %p\n" , |
684 | lp->rfd_head, lp->rbd_head)); |
685 | |
686 | |
687 | rfd = lp->rfd_head; /* Ref next frame to check */ |
688 | |
689 | dma_sync_cpu(ndev: dev, addr: rfd, len: sizeof(struct i596_rfd)); |
690 | while (rfd->stat & SWAP16(STAT_C)) { /* Loop while complete frames */ |
691 | if (rfd->rbd == I596_NULL) |
692 | rbd = NULL; |
693 | else if (rfd->rbd == lp->rbd_head->b_addr) { |
694 | rbd = lp->rbd_head; |
695 | dma_sync_cpu(ndev: dev, addr: rbd, len: sizeof(struct i596_rbd)); |
696 | } else { |
697 | printk(KERN_ERR "%s: rbd chain broken!\n" , dev->name); |
698 | /* XXX Now what? */ |
699 | rbd = NULL; |
700 | } |
701 | DEB(DEB_RXFRAME, printk(KERN_DEBUG |
702 | " rfd %p, rfd.rbd %08x, rfd.stat %04x\n" , |
703 | rfd, rfd->rbd, rfd->stat)); |
704 | |
705 | if (rbd != NULL && (rfd->stat & SWAP16(STAT_OK))) { |
706 | /* a good frame */ |
707 | int pkt_len = SWAP16(rbd->count) & 0x3fff; |
708 | struct sk_buff *skb = rbd->skb; |
709 | int rx_in_place = 0; |
710 | |
711 | DEB(DEB_RXADDR, print_eth(rbd->v_data, "received" )); |
712 | frames++; |
713 | |
714 | /* Check if the packet is long enough to just accept |
715 | * without copying to a properly sized skbuff. |
716 | */ |
717 | |
718 | if (pkt_len > rx_copybreak) { |
719 | struct sk_buff *newskb; |
720 | dma_addr_t dma_addr; |
721 | |
722 | dma_unmap_single(dev->dev.parent, |
723 | (dma_addr_t)SWAP32(rbd->b_data), |
724 | PKT_BUF_SZ, DMA_FROM_DEVICE); |
725 | /* Get fresh skbuff to replace filled one. */ |
726 | newskb = netdev_alloc_skb_ip_align(dev, |
727 | PKT_BUF_SZ); |
728 | if (newskb == NULL) { |
729 | skb = NULL; /* drop pkt */ |
730 | goto memory_squeeze; |
731 | } |
732 | |
733 | /* Pass up the skb already on the Rx ring. */ |
734 | skb_put(skb, len: pkt_len); |
735 | rx_in_place = 1; |
736 | rbd->skb = newskb; |
737 | dma_addr = dma_map_single(dev->dev.parent, |
738 | newskb->data, |
739 | PKT_BUF_SZ, |
740 | DMA_FROM_DEVICE); |
741 | rbd->v_data = newskb->data; |
742 | rbd->b_data = SWAP32(dma_addr); |
743 | dma_sync_dev(ndev: dev, addr: rbd, len: sizeof(struct i596_rbd)); |
744 | } else { |
745 | skb = netdev_alloc_skb_ip_align(dev, length: pkt_len); |
746 | } |
747 | memory_squeeze: |
748 | if (skb == NULL) { |
749 | /* XXX tulip.c can defer packets here!! */ |
750 | dev->stats.rx_dropped++; |
751 | } else { |
752 | if (!rx_in_place) { |
753 | /* 16 byte align the data fields */ |
754 | dma_sync_single_for_cpu(dev: dev->dev.parent, |
755 | addr: (dma_addr_t)SWAP32(rbd->b_data), |
756 | PKT_BUF_SZ, dir: DMA_FROM_DEVICE); |
757 | skb_put_data(skb, data: rbd->v_data, |
758 | len: pkt_len); |
759 | dma_sync_single_for_device(dev: dev->dev.parent, |
760 | addr: (dma_addr_t)SWAP32(rbd->b_data), |
761 | PKT_BUF_SZ, dir: DMA_FROM_DEVICE); |
762 | } |
763 | skb->len = pkt_len; |
764 | skb->protocol = eth_type_trans(skb, dev); |
765 | netif_rx(skb); |
766 | dev->stats.rx_packets++; |
767 | dev->stats.rx_bytes += pkt_len; |
768 | } |
769 | } else { |
770 | DEB(DEB_ERRORS, printk(KERN_DEBUG |
771 | "%s: Error, rfd.stat = 0x%04x\n" , |
772 | dev->name, rfd->stat)); |
773 | dev->stats.rx_errors++; |
774 | if (rfd->stat & SWAP16(0x0100)) |
775 | dev->stats.collisions++; |
776 | if (rfd->stat & SWAP16(0x8000)) |
777 | dev->stats.rx_length_errors++; |
778 | if (rfd->stat & SWAP16(0x0001)) |
779 | dev->stats.rx_over_errors++; |
780 | if (rfd->stat & SWAP16(0x0002)) |
781 | dev->stats.rx_fifo_errors++; |
782 | if (rfd->stat & SWAP16(0x0004)) |
783 | dev->stats.rx_frame_errors++; |
784 | if (rfd->stat & SWAP16(0x0008)) |
785 | dev->stats.rx_crc_errors++; |
786 | if (rfd->stat & SWAP16(0x0010)) |
787 | dev->stats.rx_length_errors++; |
788 | } |
789 | |
790 | /* Clear the buffer descriptor count and EOF + F flags */ |
791 | |
792 | if (rbd != NULL && (rbd->count & SWAP16(0x4000))) { |
793 | rbd->count = 0; |
794 | lp->rbd_head = rbd->v_next; |
795 | dma_sync_dev(ndev: dev, addr: rbd, len: sizeof(struct i596_rbd)); |
796 | } |
797 | |
798 | /* Tidy the frame descriptor, marking it as end of list */ |
799 | |
800 | rfd->rbd = I596_NULL; |
801 | rfd->stat = 0; |
802 | rfd->cmd = SWAP16(CMD_EOL|CMD_FLEX); |
803 | rfd->count = 0; |
804 | |
805 | /* Update record of next frame descriptor to process */ |
806 | |
807 | lp->dma->scb.rfd = rfd->b_next; |
808 | lp->rfd_head = rfd->v_next; |
809 | dma_sync_dev(ndev: dev, addr: rfd, len: sizeof(struct i596_rfd)); |
810 | |
811 | /* Remove end-of-list from old end descriptor */ |
812 | |
813 | rfd->v_prev->cmd = SWAP16(CMD_FLEX); |
814 | dma_sync_dev(ndev: dev, addr: rfd->v_prev, len: sizeof(struct i596_rfd)); |
815 | rfd = lp->rfd_head; |
816 | dma_sync_cpu(ndev: dev, addr: rfd, len: sizeof(struct i596_rfd)); |
817 | } |
818 | |
819 | DEB(DEB_RXFRAME, printk(KERN_DEBUG "frames %d\n" , frames)); |
820 | |
821 | return 0; |
822 | } |
823 | |
824 | |
825 | static inline void i596_cleanup_cmd(struct net_device *dev, struct i596_private *lp) |
826 | { |
827 | struct i596_cmd *ptr; |
828 | |
829 | while (lp->cmd_head != NULL) { |
830 | ptr = lp->cmd_head; |
831 | lp->cmd_head = ptr->v_next; |
832 | lp->cmd_backlog--; |
833 | |
834 | switch (SWAP16(ptr->command) & 0x7) { |
835 | case CmdTx: |
836 | { |
837 | struct tx_cmd *tx_cmd = (struct tx_cmd *) ptr; |
838 | struct sk_buff *skb = tx_cmd->skb; |
839 | dma_unmap_single(dev->dev.parent, |
840 | tx_cmd->dma_addr, |
841 | skb->len, DMA_TO_DEVICE); |
842 | |
843 | dev_kfree_skb(skb); |
844 | |
845 | dev->stats.tx_errors++; |
846 | dev->stats.tx_aborted_errors++; |
847 | |
848 | ptr->v_next = NULL; |
849 | ptr->b_next = I596_NULL; |
850 | tx_cmd->cmd.command = 0; /* Mark as free */ |
851 | break; |
852 | } |
853 | default: |
854 | ptr->v_next = NULL; |
855 | ptr->b_next = I596_NULL; |
856 | } |
857 | dma_sync_dev(ndev: dev, addr: ptr, len: sizeof(struct i596_cmd)); |
858 | } |
859 | |
860 | wait_cmd(dev, dma: lp->dma, delcnt: 100, str: "i596_cleanup_cmd timed out" ); |
861 | lp->dma->scb.cmd = I596_NULL; |
862 | dma_sync_dev(ndev: dev, addr: &(lp->dma->scb), len: sizeof(struct i596_scb)); |
863 | } |
864 | |
865 | |
866 | static inline void i596_reset(struct net_device *dev, struct i596_private *lp) |
867 | { |
868 | unsigned long flags; |
869 | |
870 | DEB(DEB_RESET, printk(KERN_DEBUG "i596_reset\n" )); |
871 | |
872 | spin_lock_irqsave (&lp->lock, flags); |
873 | |
874 | wait_cmd(dev, dma: lp->dma, delcnt: 100, str: "i596_reset timed out" ); |
875 | |
876 | netif_stop_queue(dev); |
877 | |
878 | /* FIXME: this command might cause an lpmc */ |
879 | lp->dma->scb.command = SWAP16(CUC_ABORT | RX_ABORT); |
880 | dma_sync_dev(ndev: dev, addr: &(lp->dma->scb), len: sizeof(struct i596_scb)); |
881 | ca(dev); |
882 | |
883 | /* wait for shutdown */ |
884 | wait_cmd(dev, dma: lp->dma, delcnt: 1000, str: "i596_reset 2 timed out" ); |
885 | spin_unlock_irqrestore (lock: &lp->lock, flags); |
886 | |
887 | i596_cleanup_cmd(dev, lp); |
888 | i596_rx(dev); |
889 | |
890 | netif_start_queue(dev); |
891 | init_i596_mem(dev); |
892 | } |
893 | |
894 | |
895 | static void i596_add_cmd(struct net_device *dev, struct i596_cmd *cmd) |
896 | { |
897 | struct i596_private *lp = netdev_priv(dev); |
898 | struct i596_dma *dma = lp->dma; |
899 | unsigned long flags; |
900 | |
901 | DEB(DEB_ADDCMD, printk(KERN_DEBUG "i596_add_cmd cmd_head %p\n" , |
902 | lp->cmd_head)); |
903 | |
904 | cmd->status = 0; |
905 | cmd->command |= SWAP16(CMD_EOL | CMD_INTR); |
906 | cmd->v_next = NULL; |
907 | cmd->b_next = I596_NULL; |
908 | dma_sync_dev(ndev: dev, addr: cmd, len: sizeof(struct i596_cmd)); |
909 | |
910 | spin_lock_irqsave (&lp->lock, flags); |
911 | |
912 | if (lp->cmd_head != NULL) { |
913 | lp->cmd_tail->v_next = cmd; |
914 | lp->cmd_tail->b_next = SWAP32(virt_to_dma(lp, &cmd->status)); |
915 | dma_sync_dev(ndev: dev, addr: lp->cmd_tail, len: sizeof(struct i596_cmd)); |
916 | } else { |
917 | lp->cmd_head = cmd; |
918 | wait_cmd(dev, dma, delcnt: 100, str: "i596_add_cmd timed out" ); |
919 | dma->scb.cmd = SWAP32(virt_to_dma(lp, &cmd->status)); |
920 | dma->scb.command = SWAP16(CUC_START); |
921 | dma_sync_dev(ndev: dev, addr: &(dma->scb), len: sizeof(struct i596_scb)); |
922 | ca(dev); |
923 | } |
924 | lp->cmd_tail = cmd; |
925 | lp->cmd_backlog++; |
926 | |
927 | spin_unlock_irqrestore (lock: &lp->lock, flags); |
928 | |
929 | if (lp->cmd_backlog > max_cmd_backlog) { |
930 | unsigned long tickssofar = jiffies - lp->last_cmd; |
931 | |
932 | if (tickssofar < ticks_limit) |
933 | return; |
934 | |
935 | printk(KERN_ERR |
936 | "%s: command unit timed out, status resetting.\n" , |
937 | dev->name); |
938 | #if 1 |
939 | i596_reset(dev, lp); |
940 | #endif |
941 | } |
942 | } |
943 | |
944 | static int i596_open(struct net_device *dev) |
945 | { |
946 | DEB(DEB_OPEN, printk(KERN_DEBUG |
947 | "%s: i596_open() irq %d.\n" , dev->name, dev->irq)); |
948 | |
949 | if (init_rx_bufs(dev)) { |
950 | printk(KERN_ERR "%s: Failed to init rx bufs\n" , dev->name); |
951 | return -EAGAIN; |
952 | } |
953 | if (init_i596_mem(dev)) { |
954 | printk(KERN_ERR "%s: Failed to init memory\n" , dev->name); |
955 | goto out_remove_rx_bufs; |
956 | } |
957 | netif_start_queue(dev); |
958 | |
959 | return 0; |
960 | |
961 | out_remove_rx_bufs: |
962 | remove_rx_bufs(dev); |
963 | return -EAGAIN; |
964 | } |
965 | |
966 | static void i596_tx_timeout (struct net_device *dev, unsigned int txqueue) |
967 | { |
968 | struct i596_private *lp = netdev_priv(dev); |
969 | |
970 | /* Transmitter timeout, serious problems. */ |
971 | DEB(DEB_ERRORS, printk(KERN_DEBUG |
972 | "%s: transmit timed out, status resetting.\n" , |
973 | dev->name)); |
974 | |
975 | dev->stats.tx_errors++; |
976 | |
977 | /* Try to restart the adaptor */ |
978 | if (lp->last_restart == dev->stats.tx_packets) { |
979 | DEB(DEB_ERRORS, printk(KERN_DEBUG "Resetting board.\n" )); |
980 | /* Shutdown and restart */ |
981 | i596_reset (dev, lp); |
982 | } else { |
983 | /* Issue a channel attention signal */ |
984 | DEB(DEB_ERRORS, printk(KERN_DEBUG "Kicking board.\n" )); |
985 | lp->dma->scb.command = SWAP16(CUC_START | RX_START); |
986 | dma_sync_dev(ndev: dev, addr: &(lp->dma->scb), len: sizeof(struct i596_scb)); |
987 | ca (dev); |
988 | lp->last_restart = dev->stats.tx_packets; |
989 | } |
990 | |
991 | netif_trans_update(dev); /* prevent tx timeout */ |
992 | netif_wake_queue (dev); |
993 | } |
994 | |
995 | |
996 | static netdev_tx_t i596_start_xmit(struct sk_buff *skb, struct net_device *dev) |
997 | { |
998 | struct i596_private *lp = netdev_priv(dev); |
999 | struct tx_cmd *tx_cmd; |
1000 | struct i596_tbd *tbd; |
1001 | short length = skb->len; |
1002 | |
1003 | DEB(DEB_STARTTX, printk(KERN_DEBUG |
1004 | "%s: i596_start_xmit(%x,%p) called\n" , |
1005 | dev->name, skb->len, skb->data)); |
1006 | |
1007 | if (length < ETH_ZLEN) { |
1008 | if (skb_padto(skb, ETH_ZLEN)) |
1009 | return NETDEV_TX_OK; |
1010 | length = ETH_ZLEN; |
1011 | } |
1012 | |
1013 | netif_stop_queue(dev); |
1014 | |
1015 | tx_cmd = lp->dma->tx_cmds + lp->next_tx_cmd; |
1016 | tbd = lp->dma->tbds + lp->next_tx_cmd; |
1017 | |
1018 | if (tx_cmd->cmd.command) { |
1019 | DEB(DEB_ERRORS, printk(KERN_DEBUG |
1020 | "%s: xmit ring full, dropping packet.\n" , |
1021 | dev->name)); |
1022 | dev->stats.tx_dropped++; |
1023 | |
1024 | dev_kfree_skb_any(skb); |
1025 | } else { |
1026 | if (++lp->next_tx_cmd == TX_RING_SIZE) |
1027 | lp->next_tx_cmd = 0; |
1028 | tx_cmd->tbd = SWAP32(virt_to_dma(lp, tbd)); |
1029 | tbd->next = I596_NULL; |
1030 | |
1031 | tx_cmd->cmd.command = SWAP16(CMD_FLEX | CmdTx); |
1032 | tx_cmd->skb = skb; |
1033 | |
1034 | tx_cmd->pad = 0; |
1035 | tx_cmd->size = 0; |
1036 | tbd->pad = 0; |
1037 | tbd->size = SWAP16(EOF | length); |
1038 | |
1039 | tx_cmd->dma_addr = dma_map_single(dev->dev.parent, skb->data, |
1040 | skb->len, DMA_TO_DEVICE); |
1041 | tbd->data = SWAP32(tx_cmd->dma_addr); |
1042 | |
1043 | DEB(DEB_TXADDR, print_eth(skb->data, "tx-queued" )); |
1044 | dma_sync_dev(ndev: dev, addr: tx_cmd, len: sizeof(struct tx_cmd)); |
1045 | dma_sync_dev(ndev: dev, addr: tbd, len: sizeof(struct i596_tbd)); |
1046 | i596_add_cmd(dev, cmd: &tx_cmd->cmd); |
1047 | |
1048 | dev->stats.tx_packets++; |
1049 | dev->stats.tx_bytes += length; |
1050 | } |
1051 | |
1052 | netif_start_queue(dev); |
1053 | |
1054 | return NETDEV_TX_OK; |
1055 | } |
1056 | |
1057 | static void print_eth(unsigned char *add, char *str) |
1058 | { |
1059 | printk(KERN_DEBUG "i596 0x%p, %pM --> %pM %02X%02X, %s\n" , |
1060 | add, add + 6, add, add[12], add[13], str); |
1061 | } |
1062 | static const struct net_device_ops i596_netdev_ops = { |
1063 | .ndo_open = i596_open, |
1064 | .ndo_stop = i596_close, |
1065 | .ndo_start_xmit = i596_start_xmit, |
1066 | .ndo_set_rx_mode = set_multicast_list, |
1067 | .ndo_tx_timeout = i596_tx_timeout, |
1068 | .ndo_validate_addr = eth_validate_addr, |
1069 | .ndo_set_mac_address = eth_mac_addr, |
1070 | #ifdef CONFIG_NET_POLL_CONTROLLER |
1071 | .ndo_poll_controller = i596_poll_controller, |
1072 | #endif |
1073 | }; |
1074 | |
1075 | static int i82596_probe(struct net_device *dev) |
1076 | { |
1077 | struct i596_private *lp = netdev_priv(dev); |
1078 | int ret; |
1079 | |
1080 | /* This lot is ensure things have been cache line aligned. */ |
1081 | BUILD_BUG_ON(sizeof(struct i596_rfd) != 32); |
1082 | BUILD_BUG_ON(sizeof(struct i596_rbd) & 31); |
1083 | BUILD_BUG_ON(sizeof(struct tx_cmd) & 31); |
1084 | BUILD_BUG_ON(sizeof(struct i596_tbd) != 32); |
1085 | #ifndef __LP64__ |
1086 | BUILD_BUG_ON(sizeof(struct i596_dma) > 4096); |
1087 | #endif |
1088 | |
1089 | if (!dev->base_addr || !dev->irq) |
1090 | return -ENODEV; |
1091 | |
1092 | dev->netdev_ops = &i596_netdev_ops; |
1093 | dev->watchdog_timeo = TX_TIMEOUT; |
1094 | |
1095 | memset(lp->dma, 0, sizeof(struct i596_dma)); |
1096 | lp->dma->scb.command = 0; |
1097 | lp->dma->scb.cmd = I596_NULL; |
1098 | lp->dma->scb.rfd = I596_NULL; |
1099 | spin_lock_init(&lp->lock); |
1100 | |
1101 | dma_sync_dev(ndev: dev, addr: lp->dma, len: sizeof(struct i596_dma)); |
1102 | |
1103 | ret = register_netdev(dev); |
1104 | if (ret) |
1105 | return ret; |
1106 | |
1107 | DEB(DEB_PROBE, printk(KERN_INFO "%s: 82596 at %#3lx, %pM IRQ %d.\n" , |
1108 | dev->name, dev->base_addr, dev->dev_addr, |
1109 | dev->irq)); |
1110 | DEB(DEB_INIT, printk(KERN_INFO |
1111 | "%s: dma at 0x%p (%d bytes), lp->scb at 0x%p\n" , |
1112 | dev->name, lp->dma, (int)sizeof(struct i596_dma), |
1113 | &lp->dma->scb)); |
1114 | |
1115 | return 0; |
1116 | } |
1117 | |
1118 | #ifdef CONFIG_NET_POLL_CONTROLLER |
1119 | static void i596_poll_controller(struct net_device *dev) |
1120 | { |
1121 | disable_irq(irq: dev->irq); |
1122 | i596_interrupt(irq: dev->irq, dev_id: dev); |
1123 | enable_irq(irq: dev->irq); |
1124 | } |
1125 | #endif |
1126 | |
1127 | static irqreturn_t i596_interrupt(int irq, void *dev_id) |
1128 | { |
1129 | struct net_device *dev = dev_id; |
1130 | struct i596_private *lp; |
1131 | struct i596_dma *dma; |
1132 | unsigned short status, ack_cmd = 0; |
1133 | |
1134 | lp = netdev_priv(dev); |
1135 | dma = lp->dma; |
1136 | |
1137 | spin_lock (lock: &lp->lock); |
1138 | |
1139 | wait_cmd(dev, dma, delcnt: 100, str: "i596 interrupt, timeout" ); |
1140 | status = SWAP16(dma->scb.status); |
1141 | |
1142 | DEB(DEB_INTS, printk(KERN_DEBUG |
1143 | "%s: i596 interrupt, IRQ %d, status %4.4x.\n" , |
1144 | dev->name, dev->irq, status)); |
1145 | |
1146 | ack_cmd = status & 0xf000; |
1147 | |
1148 | if (!ack_cmd) { |
1149 | DEB(DEB_ERRORS, printk(KERN_DEBUG |
1150 | "%s: interrupt with no events\n" , |
1151 | dev->name)); |
1152 | spin_unlock (lock: &lp->lock); |
1153 | return IRQ_NONE; |
1154 | } |
1155 | |
1156 | if ((status & 0x8000) || (status & 0x2000)) { |
1157 | struct i596_cmd *ptr; |
1158 | |
1159 | if ((status & 0x8000)) |
1160 | DEB(DEB_INTS, |
1161 | printk(KERN_DEBUG |
1162 | "%s: i596 interrupt completed command.\n" , |
1163 | dev->name)); |
1164 | if ((status & 0x2000)) |
1165 | DEB(DEB_INTS, |
1166 | printk(KERN_DEBUG |
1167 | "%s: i596 interrupt command unit inactive %x.\n" , |
1168 | dev->name, status & 0x0700)); |
1169 | |
1170 | while (lp->cmd_head != NULL) { |
1171 | dma_sync_cpu(ndev: dev, addr: lp->cmd_head, len: sizeof(struct i596_cmd)); |
1172 | if (!(lp->cmd_head->status & SWAP16(STAT_C))) |
1173 | break; |
1174 | |
1175 | ptr = lp->cmd_head; |
1176 | |
1177 | DEB(DEB_STATUS, |
1178 | printk(KERN_DEBUG |
1179 | "cmd_head->status = %04x, ->command = %04x\n" , |
1180 | SWAP16(lp->cmd_head->status), |
1181 | SWAP16(lp->cmd_head->command))); |
1182 | lp->cmd_head = ptr->v_next; |
1183 | lp->cmd_backlog--; |
1184 | |
1185 | switch (SWAP16(ptr->command) & 0x7) { |
1186 | case CmdTx: |
1187 | { |
1188 | struct tx_cmd *tx_cmd = (struct tx_cmd *) ptr; |
1189 | struct sk_buff *skb = tx_cmd->skb; |
1190 | |
1191 | if (ptr->status & SWAP16(STAT_OK)) { |
1192 | DEB(DEB_TXADDR, |
1193 | print_eth(skb->data, "tx-done" )); |
1194 | } else { |
1195 | dev->stats.tx_errors++; |
1196 | if (ptr->status & SWAP16(0x0020)) |
1197 | dev->stats.collisions++; |
1198 | if (!(ptr->status & SWAP16(0x0040))) |
1199 | dev->stats.tx_heartbeat_errors++; |
1200 | if (ptr->status & SWAP16(0x0400)) |
1201 | dev->stats.tx_carrier_errors++; |
1202 | if (ptr->status & SWAP16(0x0800)) |
1203 | dev->stats.collisions++; |
1204 | if (ptr->status & SWAP16(0x1000)) |
1205 | dev->stats.tx_aborted_errors++; |
1206 | } |
1207 | dma_unmap_single(dev->dev.parent, |
1208 | tx_cmd->dma_addr, |
1209 | skb->len, DMA_TO_DEVICE); |
1210 | dev_consume_skb_irq(skb); |
1211 | |
1212 | tx_cmd->cmd.command = 0; /* Mark free */ |
1213 | break; |
1214 | } |
1215 | case CmdTDR: |
1216 | { |
1217 | unsigned short status = SWAP16(((struct tdr_cmd *)ptr)->status); |
1218 | |
1219 | if (status & 0x8000) { |
1220 | DEB(DEB_ANY, |
1221 | printk(KERN_DEBUG "%s: link ok.\n" , |
1222 | dev->name)); |
1223 | } else { |
1224 | if (status & 0x4000) |
1225 | printk(KERN_ERR |
1226 | "%s: Transceiver problem.\n" , |
1227 | dev->name); |
1228 | if (status & 0x2000) |
1229 | printk(KERN_ERR |
1230 | "%s: Termination problem.\n" , |
1231 | dev->name); |
1232 | if (status & 0x1000) |
1233 | printk(KERN_ERR |
1234 | "%s: Short circuit.\n" , |
1235 | dev->name); |
1236 | |
1237 | DEB(DEB_TDR, |
1238 | printk(KERN_DEBUG "%s: Time %d.\n" , |
1239 | dev->name, status & 0x07ff)); |
1240 | } |
1241 | break; |
1242 | } |
1243 | case CmdConfigure: |
1244 | /* |
1245 | * Zap command so set_multicast_list() know |
1246 | * it is free |
1247 | */ |
1248 | ptr->command = 0; |
1249 | break; |
1250 | } |
1251 | ptr->v_next = NULL; |
1252 | ptr->b_next = I596_NULL; |
1253 | dma_sync_dev(ndev: dev, addr: ptr, len: sizeof(struct i596_cmd)); |
1254 | lp->last_cmd = jiffies; |
1255 | } |
1256 | |
1257 | /* This mess is arranging that only the last of any outstanding |
1258 | * commands has the interrupt bit set. Should probably really |
1259 | * only add to the cmd queue when the CU is stopped. |
1260 | */ |
1261 | ptr = lp->cmd_head; |
1262 | while ((ptr != NULL) && (ptr != lp->cmd_tail)) { |
1263 | struct i596_cmd *prev = ptr; |
1264 | |
1265 | ptr->command &= SWAP16(0x1fff); |
1266 | ptr = ptr->v_next; |
1267 | dma_sync_dev(ndev: dev, addr: prev, len: sizeof(struct i596_cmd)); |
1268 | } |
1269 | |
1270 | if (lp->cmd_head != NULL) |
1271 | ack_cmd |= CUC_START; |
1272 | dma->scb.cmd = SWAP32(virt_to_dma(lp, &lp->cmd_head->status)); |
1273 | dma_sync_dev(ndev: dev, addr: &dma->scb, len: sizeof(struct i596_scb)); |
1274 | } |
1275 | if ((status & 0x1000) || (status & 0x4000)) { |
1276 | if ((status & 0x4000)) |
1277 | DEB(DEB_INTS, |
1278 | printk(KERN_DEBUG |
1279 | "%s: i596 interrupt received a frame.\n" , |
1280 | dev->name)); |
1281 | i596_rx(dev); |
1282 | /* Only RX_START if stopped - RGH 07-07-96 */ |
1283 | if (status & 0x1000) { |
1284 | if (netif_running(dev)) { |
1285 | DEB(DEB_ERRORS, |
1286 | printk(KERN_DEBUG |
1287 | "%s: i596 interrupt receive unit inactive, status 0x%x\n" , |
1288 | dev->name, status)); |
1289 | ack_cmd |= RX_START; |
1290 | dev->stats.rx_errors++; |
1291 | dev->stats.rx_fifo_errors++; |
1292 | rebuild_rx_bufs(dev); |
1293 | } |
1294 | } |
1295 | } |
1296 | wait_cmd(dev, dma, delcnt: 100, str: "i596 interrupt, timeout" ); |
1297 | dma->scb.command = SWAP16(ack_cmd); |
1298 | dma_sync_dev(ndev: dev, addr: &dma->scb, len: sizeof(struct i596_scb)); |
1299 | |
1300 | /* DANGER: I suspect that some kind of interrupt |
1301 | acknowledgement aside from acking the 82596 might be needed |
1302 | here... but it's running acceptably without */ |
1303 | |
1304 | ca(dev); |
1305 | |
1306 | wait_cmd(dev, dma, delcnt: 100, str: "i596 interrupt, exit timeout" ); |
1307 | DEB(DEB_INTS, printk(KERN_DEBUG "%s: exiting interrupt.\n" , dev->name)); |
1308 | |
1309 | spin_unlock (lock: &lp->lock); |
1310 | return IRQ_HANDLED; |
1311 | } |
1312 | |
1313 | static int i596_close(struct net_device *dev) |
1314 | { |
1315 | struct i596_private *lp = netdev_priv(dev); |
1316 | unsigned long flags; |
1317 | |
1318 | netif_stop_queue(dev); |
1319 | |
1320 | DEB(DEB_INIT, |
1321 | printk(KERN_DEBUG |
1322 | "%s: Shutting down ethercard, status was %4.4x.\n" , |
1323 | dev->name, SWAP16(lp->dma->scb.status))); |
1324 | |
1325 | spin_lock_irqsave(&lp->lock, flags); |
1326 | |
1327 | wait_cmd(dev, dma: lp->dma, delcnt: 100, str: "close1 timed out" ); |
1328 | lp->dma->scb.command = SWAP16(CUC_ABORT | RX_ABORT); |
1329 | dma_sync_dev(ndev: dev, addr: &lp->dma->scb, len: sizeof(struct i596_scb)); |
1330 | |
1331 | ca(dev); |
1332 | |
1333 | wait_cmd(dev, dma: lp->dma, delcnt: 100, str: "close2 timed out" ); |
1334 | spin_unlock_irqrestore(lock: &lp->lock, flags); |
1335 | DEB(DEB_STRUCT, i596_display_data(dev)); |
1336 | i596_cleanup_cmd(dev, lp); |
1337 | |
1338 | free_irq(dev->irq, dev); |
1339 | remove_rx_bufs(dev); |
1340 | |
1341 | return 0; |
1342 | } |
1343 | |
1344 | /* |
1345 | * Set or clear the multicast filter for this adaptor. |
1346 | */ |
1347 | |
1348 | static void set_multicast_list(struct net_device *dev) |
1349 | { |
1350 | struct i596_private *lp = netdev_priv(dev); |
1351 | struct i596_dma *dma = lp->dma; |
1352 | int config = 0, cnt; |
1353 | |
1354 | DEB(DEB_MULTI, |
1355 | printk(KERN_DEBUG |
1356 | "%s: set multicast list, %d entries, promisc %s, allmulti %s\n" , |
1357 | dev->name, netdev_mc_count(dev), |
1358 | dev->flags & IFF_PROMISC ? "ON" : "OFF" , |
1359 | dev->flags & IFF_ALLMULTI ? "ON" : "OFF" )); |
1360 | |
1361 | if ((dev->flags & IFF_PROMISC) && |
1362 | !(dma->cf_cmd.i596_config[8] & 0x01)) { |
1363 | dma->cf_cmd.i596_config[8] |= 0x01; |
1364 | config = 1; |
1365 | } |
1366 | if (!(dev->flags & IFF_PROMISC) && |
1367 | (dma->cf_cmd.i596_config[8] & 0x01)) { |
1368 | dma->cf_cmd.i596_config[8] &= ~0x01; |
1369 | config = 1; |
1370 | } |
1371 | if ((dev->flags & IFF_ALLMULTI) && |
1372 | (dma->cf_cmd.i596_config[11] & 0x20)) { |
1373 | dma->cf_cmd.i596_config[11] &= ~0x20; |
1374 | config = 1; |
1375 | } |
1376 | if (!(dev->flags & IFF_ALLMULTI) && |
1377 | !(dma->cf_cmd.i596_config[11] & 0x20)) { |
1378 | dma->cf_cmd.i596_config[11] |= 0x20; |
1379 | config = 1; |
1380 | } |
1381 | if (config) { |
1382 | if (dma->cf_cmd.cmd.command) |
1383 | printk(KERN_INFO |
1384 | "%s: config change request already queued\n" , |
1385 | dev->name); |
1386 | else { |
1387 | dma->cf_cmd.cmd.command = SWAP16(CmdConfigure); |
1388 | dma_sync_dev(ndev: dev, addr: &dma->cf_cmd, len: sizeof(struct cf_cmd)); |
1389 | i596_add_cmd(dev, cmd: &dma->cf_cmd.cmd); |
1390 | } |
1391 | } |
1392 | |
1393 | cnt = netdev_mc_count(dev); |
1394 | if (cnt > MAX_MC_CNT) { |
1395 | cnt = MAX_MC_CNT; |
1396 | printk(KERN_NOTICE "%s: Only %d multicast addresses supported" , |
1397 | dev->name, cnt); |
1398 | } |
1399 | |
1400 | if (!netdev_mc_empty(dev)) { |
1401 | struct netdev_hw_addr *ha; |
1402 | unsigned char *cp; |
1403 | struct mc_cmd *cmd; |
1404 | |
1405 | cmd = &dma->mc_cmd; |
1406 | cmd->cmd.command = SWAP16(CmdMulticastList); |
1407 | cmd->mc_cnt = SWAP16(netdev_mc_count(dev) * 6); |
1408 | cp = cmd->mc_addrs; |
1409 | netdev_for_each_mc_addr(ha, dev) { |
1410 | if (!cnt--) |
1411 | break; |
1412 | memcpy(cp, ha->addr, ETH_ALEN); |
1413 | if (i596_debug > 1) |
1414 | DEB(DEB_MULTI, |
1415 | printk(KERN_DEBUG |
1416 | "%s: Adding address %pM\n" , |
1417 | dev->name, cp)); |
1418 | cp += ETH_ALEN; |
1419 | } |
1420 | dma_sync_dev(ndev: dev, addr: &dma->mc_cmd, len: sizeof(struct mc_cmd)); |
1421 | i596_add_cmd(dev, cmd: &cmd->cmd); |
1422 | } |
1423 | } |
1424 | |