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1da177e4 LT |
1 | /* 3c527.c: 3Com Etherlink/MC32 driver for Linux 2.4 and 2.6. |
2 | * | |
3 | * (c) Copyright 1998 Red Hat Software Inc | |
6aa20a22 | 4 | * Written by Alan Cox. |
1da177e4 LT |
5 | * Further debugging by Carl Drougge. |
6 | * Initial SMP support by Felipe W Damasio <felipewd@terra.com.br> | |
7 | * Heavily modified by Richard Procter <rnp@paradise.net.nz> | |
8 | * | |
9 | * Based on skeleton.c written 1993-94 by Donald Becker and ne2.c | |
10 | * (for the MCA stuff) written by Wim Dumon. | |
11 | * | |
12 | * Thanks to 3Com for making this possible by providing me with the | |
13 | * documentation. | |
14 | * | |
15 | * This software may be used and distributed according to the terms | |
16 | * of the GNU General Public License, incorporated herein by reference. | |
17 | * | |
18 | */ | |
19 | ||
20 | #define DRV_NAME "3c527" | |
21 | #define DRV_VERSION "0.7-SMP" | |
22 | #define DRV_RELDATE "2003/09/21" | |
23 | ||
24 | static const char *version = | |
25 | DRV_NAME ".c:v" DRV_VERSION " " DRV_RELDATE " Richard Procter <rnp@paradise.net.nz>\n"; | |
26 | ||
27 | /** | |
28 | * DOC: Traps for the unwary | |
29 | * | |
30 | * The diagram (Figure 1-1) and the POS summary disagree with the | |
31 | * "Interrupt Level" section in the manual. | |
32 | * | |
6aa20a22 JG |
33 | * The manual contradicts itself when describing the minimum number |
34 | * buffers in the 'configure lists' command. | |
35 | * My card accepts a buffer config of 4/4. | |
1da177e4 LT |
36 | * |
37 | * Setting the SAV BP bit does not save bad packets, but | |
6aa20a22 | 38 | * only enables RX on-card stats collection. |
1da177e4 LT |
39 | * |
40 | * The documentation in places seems to miss things. In actual fact | |
41 | * I've always eventually found everything is documented, it just | |
42 | * requires careful study. | |
43 | * | |
44 | * DOC: Theory Of Operation | |
45 | * | |
46 | * The 3com 3c527 is a 32bit MCA bus mastering adapter with a large | |
47 | * amount of on board intelligence that housekeeps a somewhat dumber | |
48 | * Intel NIC. For performance we want to keep the transmit queue deep | |
49 | * as the card can transmit packets while fetching others from main | |
50 | * memory by bus master DMA. Transmission and reception are driven by | |
51 | * circular buffer queues. | |
52 | * | |
53 | * The mailboxes can be used for controlling how the card traverses | |
54 | * its buffer rings, but are used only for inital setup in this | |
55 | * implementation. The exec mailbox allows a variety of commands to | |
56 | * be executed. Each command must complete before the next is | |
57 | * executed. Primarily we use the exec mailbox for controlling the | |
58 | * multicast lists. We have to do a certain amount of interesting | |
59 | * hoop jumping as the multicast list changes can occur in interrupt | |
60 | * state when the card has an exec command pending. We defer such | |
61 | * events until the command completion interrupt. | |
62 | * | |
63 | * A copy break scheme (taken from 3c59x.c) is employed whereby | |
64 | * received frames exceeding a configurable length are passed | |
65 | * directly to the higher networking layers without incuring a copy, | |
66 | * in what amounts to a time/space trade-off. | |
6aa20a22 | 67 | * |
1da177e4 LT |
68 | * The card also keeps a large amount of statistical information |
69 | * on-board. In a perfect world, these could be used safely at no | |
70 | * cost. However, lacking information to the contrary, processing | |
71 | * them without races would involve so much extra complexity as to | |
72 | * make it unworthwhile to do so. In the end, a hybrid SW/HW | |
6aa20a22 | 73 | * implementation was made necessary --- see mc32_update_stats(). |
1da177e4 LT |
74 | * |
75 | * DOC: Notes | |
6aa20a22 | 76 | * |
1da177e4 LT |
77 | * It should be possible to use two or more cards, but at this stage |
78 | * only by loading two copies of the same module. | |
79 | * | |
80 | * The on-board 82586 NIC has trouble receiving multiple | |
81 | * back-to-back frames and so is likely to drop packets from fast | |
82 | * senders. | |
83 | **/ | |
84 | ||
85 | #include <linux/module.h> | |
86 | ||
87 | #include <linux/errno.h> | |
88 | #include <linux/netdevice.h> | |
89 | #include <linux/etherdevice.h> | |
90 | #include <linux/if_ether.h> | |
91 | #include <linux/init.h> | |
92 | #include <linux/kernel.h> | |
93 | #include <linux/types.h> | |
94 | #include <linux/fcntl.h> | |
95 | #include <linux/interrupt.h> | |
96 | #include <linux/mca-legacy.h> | |
97 | #include <linux/ioport.h> | |
98 | #include <linux/in.h> | |
99 | #include <linux/skbuff.h> | |
100 | #include <linux/slab.h> | |
101 | #include <linux/string.h> | |
102 | #include <linux/wait.h> | |
103 | #include <linux/ethtool.h> | |
104 | #include <linux/completion.h> | |
105 | #include <linux/bitops.h> | |
6188e10d | 106 | #include <linux/semaphore.h> |
1da177e4 | 107 | |
1da177e4 LT |
108 | #include <asm/uaccess.h> |
109 | #include <asm/system.h> | |
110 | #include <asm/io.h> | |
111 | #include <asm/dma.h> | |
112 | ||
113 | #include "3c527.h" | |
114 | ||
115 | MODULE_LICENSE("GPL"); | |
116 | ||
117 | /* | |
118 | * The name of the card. Is used for messages and in the requests for | |
119 | * io regions, irqs and dma channels | |
120 | */ | |
121 | static const char* cardname = DRV_NAME; | |
122 | ||
123 | /* use 0 for production, 1 for verification, >2 for debug */ | |
124 | #ifndef NET_DEBUG | |
125 | #define NET_DEBUG 2 | |
126 | #endif | |
127 | ||
128 | #undef DEBUG_IRQ | |
129 | ||
130 | static unsigned int mc32_debug = NET_DEBUG; | |
131 | ||
132 | /* The number of low I/O ports used by the ethercard. */ | |
133 | #define MC32_IO_EXTENT 8 | |
134 | ||
6aa20a22 | 135 | /* As implemented, values must be a power-of-2 -- 4/8/16/32 */ |
1da177e4 LT |
136 | #define TX_RING_LEN 32 /* Typically the card supports 37 */ |
137 | #define RX_RING_LEN 8 /* " " " */ | |
138 | ||
6aa20a22 JG |
139 | /* Copy break point, see above for details. |
140 | * Setting to > 1512 effectively disables this feature. */ | |
1da177e4 LT |
141 | #define RX_COPYBREAK 200 /* Value from 3c59x.c */ |
142 | ||
143 | /* Issue the 82586 workaround command - this is for "busy lans", but | |
6aa20a22 JG |
144 | * basically means for all lans now days - has a performance (latency) |
145 | * cost, but best set. */ | |
1da177e4 LT |
146 | static const int WORKAROUND_82586=1; |
147 | ||
148 | /* Pointers to buffers and their on-card records */ | |
6aa20a22 | 149 | struct mc32_ring_desc |
1da177e4 | 150 | { |
6aa20a22 JG |
151 | volatile struct skb_header *p; |
152 | struct sk_buff *skb; | |
1da177e4 LT |
153 | }; |
154 | ||
155 | /* Information that needs to be kept for each board. */ | |
6aa20a22 | 156 | struct mc32_local |
1da177e4 LT |
157 | { |
158 | int slot; | |
159 | ||
160 | u32 base; | |
161 | struct net_device_stats net_stats; | |
162 | volatile struct mc32_mailbox *rx_box; | |
163 | volatile struct mc32_mailbox *tx_box; | |
164 | volatile struct mc32_mailbox *exec_box; | |
165 | volatile struct mc32_stats *stats; /* Start of on-card statistics */ | |
166 | u16 tx_chain; /* Transmit list start offset */ | |
167 | u16 rx_chain; /* Receive list start offset */ | |
6aa20a22 | 168 | u16 tx_len; /* Transmit list count */ |
1da177e4 LT |
169 | u16 rx_len; /* Receive list count */ |
170 | ||
171 | u16 xceiver_desired_state; /* HALTED or RUNNING */ | |
172 | u16 cmd_nonblocking; /* Thread is uninterested in command result */ | |
173 | u16 mc_reload_wait; /* A multicast load request is pending */ | |
174 | u32 mc_list_valid; /* True when the mclist is set */ | |
175 | ||
176 | struct mc32_ring_desc tx_ring[TX_RING_LEN]; /* Host Transmit ring */ | |
177 | struct mc32_ring_desc rx_ring[RX_RING_LEN]; /* Host Receive ring */ | |
178 | ||
179 | atomic_t tx_count; /* buffers left */ | |
180 | atomic_t tx_ring_head; /* index to tx en-queue end */ | |
181 | u16 tx_ring_tail; /* index to tx de-queue end */ | |
182 | ||
6aa20a22 | 183 | u16 rx_ring_tail; /* index to rx de-queue end */ |
1da177e4 LT |
184 | |
185 | struct semaphore cmd_mutex; /* Serialises issuing of execute commands */ | |
186 | struct completion execution_cmd; /* Card has completed an execute command */ | |
187 | struct completion xceiver_cmd; /* Card has completed a tx or rx command */ | |
188 | }; | |
189 | ||
190 | /* The station (ethernet) address prefix, used for a sanity check. */ | |
191 | #define SA_ADDR0 0x02 | |
192 | #define SA_ADDR1 0x60 | |
193 | #define SA_ADDR2 0xAC | |
194 | ||
195 | struct mca_adapters_t { | |
196 | unsigned int id; | |
197 | char *name; | |
198 | }; | |
199 | ||
200 | static const struct mca_adapters_t mc32_adapters[] = { | |
201 | { 0x0041, "3COM EtherLink MC/32" }, | |
202 | { 0x8EF5, "IBM High Performance Lan Adapter" }, | |
203 | { 0x0000, NULL } | |
204 | }; | |
205 | ||
206 | ||
6aa20a22 | 207 | /* Macros for ring index manipulations */ |
1da177e4 LT |
208 | static inline u16 next_rx(u16 rx) { return (rx+1)&(RX_RING_LEN-1); }; |
209 | static inline u16 prev_rx(u16 rx) { return (rx-1)&(RX_RING_LEN-1); }; | |
210 | ||
211 | static inline u16 next_tx(u16 tx) { return (tx+1)&(TX_RING_LEN-1); }; | |
212 | ||
213 | ||
214 | /* Index to functions, as function prototypes. */ | |
215 | static int mc32_probe1(struct net_device *dev, int ioaddr); | |
216 | static int mc32_command(struct net_device *dev, u16 cmd, void *data, int len); | |
217 | static int mc32_open(struct net_device *dev); | |
218 | static void mc32_timeout(struct net_device *dev); | |
219 | static int mc32_send_packet(struct sk_buff *skb, struct net_device *dev); | |
7d12e780 | 220 | static irqreturn_t mc32_interrupt(int irq, void *dev_id); |
1da177e4 LT |
221 | static int mc32_close(struct net_device *dev); |
222 | static struct net_device_stats *mc32_get_stats(struct net_device *dev); | |
223 | static void mc32_set_multicast_list(struct net_device *dev); | |
224 | static void mc32_reset_multicast_list(struct net_device *dev); | |
7282d491 | 225 | static const struct ethtool_ops netdev_ethtool_ops; |
1da177e4 LT |
226 | |
227 | static void cleanup_card(struct net_device *dev) | |
228 | { | |
229 | struct mc32_local *lp = netdev_priv(dev); | |
230 | unsigned slot = lp->slot; | |
231 | mca_mark_as_unused(slot); | |
232 | mca_set_adapter_name(slot, NULL); | |
233 | free_irq(dev->irq, dev); | |
234 | release_region(dev->base_addr, MC32_IO_EXTENT); | |
235 | } | |
236 | ||
237 | /** | |
238 | * mc32_probe - Search for supported boards | |
239 | * @unit: interface number to use | |
240 | * | |
241 | * Because MCA bus is a real bus and we can scan for cards we could do a | |
242 | * single scan for all boards here. Right now we use the passed in device | |
243 | * structure and scan for only one board. This needs fixing for modules | |
244 | * in particular. | |
245 | */ | |
246 | ||
247 | struct net_device *__init mc32_probe(int unit) | |
248 | { | |
249 | struct net_device *dev = alloc_etherdev(sizeof(struct mc32_local)); | |
250 | static int current_mca_slot = -1; | |
251 | int i; | |
252 | int err; | |
253 | ||
254 | if (!dev) | |
255 | return ERR_PTR(-ENOMEM); | |
256 | ||
257 | if (unit >= 0) | |
258 | sprintf(dev->name, "eth%d", unit); | |
259 | ||
6aa20a22 | 260 | /* Do not check any supplied i/o locations. |
1da177e4 LT |
261 | POS registers usually don't fail :) */ |
262 | ||
6aa20a22 JG |
263 | /* MCA cards have POS registers. |
264 | Autodetecting MCA cards is extremely simple. | |
1da177e4 LT |
265 | Just search for the card. */ |
266 | ||
267 | for(i = 0; (mc32_adapters[i].name != NULL); i++) { | |
6aa20a22 | 268 | current_mca_slot = |
1da177e4 LT |
269 | mca_find_unused_adapter(mc32_adapters[i].id, 0); |
270 | ||
271 | if(current_mca_slot != MCA_NOTFOUND) { | |
272 | if(!mc32_probe1(dev, current_mca_slot)) | |
273 | { | |
6aa20a22 | 274 | mca_set_adapter_name(current_mca_slot, |
1da177e4 LT |
275 | mc32_adapters[i].name); |
276 | mca_mark_as_used(current_mca_slot); | |
277 | err = register_netdev(dev); | |
278 | if (err) { | |
279 | cleanup_card(dev); | |
280 | free_netdev(dev); | |
281 | dev = ERR_PTR(err); | |
282 | } | |
283 | return dev; | |
284 | } | |
6aa20a22 | 285 | |
1da177e4 LT |
286 | } |
287 | } | |
288 | free_netdev(dev); | |
289 | return ERR_PTR(-ENODEV); | |
290 | } | |
291 | ||
292 | /** | |
293 | * mc32_probe1 - Check a given slot for a board and test the card | |
294 | * @dev: Device structure to fill in | |
295 | * @slot: The MCA bus slot being used by this card | |
296 | * | |
297 | * Decode the slot data and configure the card structures. Having done this we | |
298 | * can reset the card and configure it. The card does a full self test cycle | |
6aa20a22 | 299 | * in firmware so we have to wait for it to return and post us either a |
1da177e4 LT |
300 | * failure case or some addresses we use to find the board internals. |
301 | */ | |
302 | ||
303 | static int __init mc32_probe1(struct net_device *dev, int slot) | |
304 | { | |
305 | static unsigned version_printed; | |
306 | int i, err; | |
307 | u8 POS; | |
308 | u32 base; | |
309 | struct mc32_local *lp = netdev_priv(dev); | |
310 | static u16 mca_io_bases[]={ | |
311 | 0x7280,0x7290, | |
312 | 0x7680,0x7690, | |
313 | 0x7A80,0x7A90, | |
314 | 0x7E80,0x7E90 | |
315 | }; | |
316 | static u32 mca_mem_bases[]={ | |
317 | 0x00C0000, | |
318 | 0x00C4000, | |
319 | 0x00C8000, | |
320 | 0x00CC000, | |
321 | 0x00D0000, | |
322 | 0x00D4000, | |
323 | 0x00D8000, | |
324 | 0x00DC000 | |
325 | }; | |
326 | static char *failures[]={ | |
327 | "Processor instruction", | |
328 | "Processor data bus", | |
329 | "Processor data bus", | |
330 | "Processor data bus", | |
331 | "Adapter bus", | |
332 | "ROM checksum", | |
333 | "Base RAM", | |
334 | "Extended RAM", | |
335 | "82586 internal loopback", | |
336 | "82586 initialisation failure", | |
337 | "Adapter list configuration error" | |
338 | }; | |
0795af57 | 339 | DECLARE_MAC_BUF(mac); |
1da177e4 LT |
340 | |
341 | /* Time to play MCA games */ | |
342 | ||
343 | if (mc32_debug && version_printed++ == 0) | |
344 | printk(KERN_DEBUG "%s", version); | |
345 | ||
346 | printk(KERN_INFO "%s: %s found in slot %d:", dev->name, cardname, slot); | |
347 | ||
348 | POS = mca_read_stored_pos(slot, 2); | |
6aa20a22 | 349 | |
1da177e4 LT |
350 | if(!(POS&1)) |
351 | { | |
352 | printk(" disabled.\n"); | |
353 | return -ENODEV; | |
354 | } | |
355 | ||
356 | /* Fill in the 'dev' fields. */ | |
357 | dev->base_addr = mca_io_bases[(POS>>1)&7]; | |
358 | dev->mem_start = mca_mem_bases[(POS>>4)&7]; | |
6aa20a22 | 359 | |
1da177e4 LT |
360 | POS = mca_read_stored_pos(slot, 4); |
361 | if(!(POS&1)) | |
362 | { | |
363 | printk("memory window disabled.\n"); | |
364 | return -ENODEV; | |
365 | } | |
366 | ||
367 | POS = mca_read_stored_pos(slot, 5); | |
6aa20a22 | 368 | |
1da177e4 LT |
369 | i=(POS>>4)&3; |
370 | if(i==3) | |
371 | { | |
372 | printk("invalid memory window.\n"); | |
373 | return -ENODEV; | |
374 | } | |
6aa20a22 | 375 | |
1da177e4 LT |
376 | i*=16384; |
377 | i+=16384; | |
6aa20a22 | 378 | |
1da177e4 | 379 | dev->mem_end=dev->mem_start + i; |
6aa20a22 | 380 | |
1da177e4 | 381 | dev->irq = ((POS>>2)&3)+9; |
6aa20a22 | 382 | |
1da177e4 LT |
383 | if(!request_region(dev->base_addr, MC32_IO_EXTENT, cardname)) |
384 | { | |
385 | printk("io 0x%3lX, which is busy.\n", dev->base_addr); | |
386 | return -EBUSY; | |
387 | } | |
388 | ||
389 | printk("io 0x%3lX irq %d mem 0x%lX (%dK)\n", | |
390 | dev->base_addr, dev->irq, dev->mem_start, i/1024); | |
6aa20a22 JG |
391 | |
392 | ||
1da177e4 | 393 | /* We ought to set the cache line size here.. */ |
6aa20a22 JG |
394 | |
395 | ||
1da177e4 LT |
396 | /* |
397 | * Go PROM browsing | |
398 | */ | |
6aa20a22 | 399 | |
1da177e4 LT |
400 | /* Retrieve and print the ethernet address. */ |
401 | for (i = 0; i < 6; i++) | |
402 | { | |
403 | mca_write_pos(slot, 6, i+12); | |
404 | mca_write_pos(slot, 7, 0); | |
6aa20a22 | 405 | |
0795af57 | 406 | dev->dev_addr[i] = mca_read_pos(slot,3); |
1da177e4 LT |
407 | } |
408 | ||
0795af57 JP |
409 | printk("%s: Address %s", dev->name, print_mac(mac, dev->dev_addr)); |
410 | ||
1da177e4 LT |
411 | mca_write_pos(slot, 6, 0); |
412 | mca_write_pos(slot, 7, 0); | |
413 | ||
414 | POS = mca_read_stored_pos(slot, 4); | |
6aa20a22 | 415 | |
1da177e4 LT |
416 | if(POS&2) |
417 | printk(" : BNC port selected.\n"); | |
6aa20a22 | 418 | else |
1da177e4 | 419 | printk(" : AUI port selected.\n"); |
6aa20a22 | 420 | |
1da177e4 LT |
421 | POS=inb(dev->base_addr+HOST_CTRL); |
422 | POS|=HOST_CTRL_ATTN|HOST_CTRL_RESET; | |
423 | POS&=~HOST_CTRL_INTE; | |
424 | outb(POS, dev->base_addr+HOST_CTRL); | |
425 | /* Reset adapter */ | |
426 | udelay(100); | |
427 | /* Reset off */ | |
428 | POS&=~(HOST_CTRL_ATTN|HOST_CTRL_RESET); | |
429 | outb(POS, dev->base_addr+HOST_CTRL); | |
6aa20a22 | 430 | |
1da177e4 | 431 | udelay(300); |
6aa20a22 | 432 | |
1da177e4 LT |
433 | /* |
434 | * Grab the IRQ | |
435 | */ | |
436 | ||
1fb9df5d | 437 | err = request_irq(dev->irq, &mc32_interrupt, IRQF_SHARED | IRQF_SAMPLE_RANDOM, DRV_NAME, dev); |
1da177e4 LT |
438 | if (err) { |
439 | release_region(dev->base_addr, MC32_IO_EXTENT); | |
440 | printk(KERN_ERR "%s: unable to get IRQ %d.\n", DRV_NAME, dev->irq); | |
441 | goto err_exit_ports; | |
442 | } | |
443 | ||
444 | memset(lp, 0, sizeof(struct mc32_local)); | |
445 | lp->slot = slot; | |
446 | ||
447 | i=0; | |
448 | ||
449 | base = inb(dev->base_addr); | |
6aa20a22 | 450 | |
1da177e4 LT |
451 | while(base == 0xFF) |
452 | { | |
453 | i++; | |
454 | if(i == 1000) | |
455 | { | |
456 | printk(KERN_ERR "%s: failed to boot adapter.\n", dev->name); | |
6aa20a22 | 457 | err = -ENODEV; |
1da177e4 LT |
458 | goto err_exit_irq; |
459 | } | |
460 | udelay(1000); | |
461 | if(inb(dev->base_addr+2)&(1<<5)) | |
462 | base = inb(dev->base_addr); | |
463 | } | |
464 | ||
465 | if(base>0) | |
466 | { | |
467 | if(base < 0x0C) | |
468 | printk(KERN_ERR "%s: %s%s.\n", dev->name, failures[base-1], | |
469 | base<0x0A?" test failure":""); | |
470 | else | |
471 | printk(KERN_ERR "%s: unknown failure %d.\n", dev->name, base); | |
6aa20a22 | 472 | err = -ENODEV; |
1da177e4 LT |
473 | goto err_exit_irq; |
474 | } | |
6aa20a22 | 475 | |
1da177e4 LT |
476 | base=0; |
477 | for(i=0;i<4;i++) | |
478 | { | |
479 | int n=0; | |
6aa20a22 | 480 | |
1da177e4 LT |
481 | while(!(inb(dev->base_addr+2)&(1<<5))) |
482 | { | |
483 | n++; | |
484 | udelay(50); | |
485 | if(n>100) | |
486 | { | |
487 | printk(KERN_ERR "%s: mailbox read fail (%d).\n", dev->name, i); | |
488 | err = -ENODEV; | |
489 | goto err_exit_irq; | |
490 | } | |
491 | } | |
492 | ||
493 | base|=(inb(dev->base_addr)<<(8*i)); | |
494 | } | |
6aa20a22 | 495 | |
1da177e4 | 496 | lp->exec_box=isa_bus_to_virt(dev->mem_start+base); |
6aa20a22 JG |
497 | |
498 | base=lp->exec_box->data[1]<<16|lp->exec_box->data[0]; | |
499 | ||
1da177e4 | 500 | lp->base = dev->mem_start+base; |
6aa20a22 JG |
501 | |
502 | lp->rx_box=isa_bus_to_virt(lp->base + lp->exec_box->data[2]); | |
1da177e4 | 503 | lp->tx_box=isa_bus_to_virt(lp->base + lp->exec_box->data[3]); |
6aa20a22 | 504 | |
1da177e4 LT |
505 | lp->stats = isa_bus_to_virt(lp->base + lp->exec_box->data[5]); |
506 | ||
507 | /* | |
508 | * Descriptor chains (card relative) | |
509 | */ | |
6aa20a22 | 510 | |
1da177e4 LT |
511 | lp->tx_chain = lp->exec_box->data[8]; /* Transmit list start offset */ |
512 | lp->rx_chain = lp->exec_box->data[10]; /* Receive list start offset */ | |
6aa20a22 | 513 | lp->tx_len = lp->exec_box->data[9]; /* Transmit list count */ |
1da177e4 LT |
514 | lp->rx_len = lp->exec_box->data[11]; /* Receive list count */ |
515 | ||
516 | init_MUTEX_LOCKED(&lp->cmd_mutex); | |
517 | init_completion(&lp->execution_cmd); | |
518 | init_completion(&lp->xceiver_cmd); | |
6aa20a22 | 519 | |
1da177e4 LT |
520 | printk("%s: Firmware Rev %d. %d RX buffers, %d TX buffers. Base of 0x%08X.\n", |
521 | dev->name, lp->exec_box->data[12], lp->rx_len, lp->tx_len, lp->base); | |
522 | ||
523 | dev->open = mc32_open; | |
524 | dev->stop = mc32_close; | |
525 | dev->hard_start_xmit = mc32_send_packet; | |
526 | dev->get_stats = mc32_get_stats; | |
527 | dev->set_multicast_list = mc32_set_multicast_list; | |
528 | dev->tx_timeout = mc32_timeout; | |
529 | dev->watchdog_timeo = HZ*5; /* Board does all the work */ | |
530 | dev->ethtool_ops = &netdev_ethtool_ops; | |
531 | ||
532 | return 0; | |
533 | ||
534 | err_exit_irq: | |
535 | free_irq(dev->irq, dev); | |
536 | err_exit_ports: | |
537 | release_region(dev->base_addr, MC32_IO_EXTENT); | |
538 | return err; | |
539 | } | |
540 | ||
541 | ||
542 | /** | |
543 | * mc32_ready_poll - wait until we can feed it a command | |
544 | * @dev: The device to wait for | |
6aa20a22 | 545 | * |
1da177e4 LT |
546 | * Wait until the card becomes ready to accept a command via the |
547 | * command register. This tells us nothing about the completion | |
548 | * status of any pending commands and takes very little time at all. | |
549 | */ | |
6aa20a22 | 550 | |
1da177e4 LT |
551 | static inline void mc32_ready_poll(struct net_device *dev) |
552 | { | |
553 | int ioaddr = dev->base_addr; | |
554 | while(!(inb(ioaddr+HOST_STATUS)&HOST_STATUS_CRR)); | |
555 | } | |
556 | ||
557 | ||
558 | /** | |
559 | * mc32_command_nowait - send a command non blocking | |
560 | * @dev: The 3c527 to issue the command to | |
561 | * @cmd: The command word to write to the mailbox | |
562 | * @data: A data block if the command expects one | |
563 | * @len: Length of the data block | |
564 | * | |
565 | * Send a command from interrupt state. If there is a command | |
566 | * currently being executed then we return an error of -1. It | |
567 | * simply isn't viable to wait around as commands may be | |
568 | * slow. This can theoretically be starved on SMP, but it's hard | |
569 | * to see a realistic situation. We do not wait for the command | |
570 | * to complete --- we rely on the interrupt handler to tidy up | |
571 | * after us. | |
572 | */ | |
573 | ||
574 | static int mc32_command_nowait(struct net_device *dev, u16 cmd, void *data, int len) | |
575 | { | |
576 | struct mc32_local *lp = netdev_priv(dev); | |
577 | int ioaddr = dev->base_addr; | |
578 | int ret = -1; | |
579 | ||
580 | if (down_trylock(&lp->cmd_mutex) == 0) | |
581 | { | |
582 | lp->cmd_nonblocking=1; | |
583 | lp->exec_box->mbox=0; | |
584 | lp->exec_box->mbox=cmd; | |
585 | memcpy((void *)lp->exec_box->data, data, len); | |
586 | barrier(); /* the memcpy forgot the volatile so be sure */ | |
587 | ||
588 | /* Send the command */ | |
589 | mc32_ready_poll(dev); | |
590 | outb(1<<6, ioaddr+HOST_CMD); | |
591 | ||
592 | ret = 0; | |
593 | ||
594 | /* Interrupt handler will signal mutex on completion */ | |
595 | } | |
596 | ||
597 | return ret; | |
598 | } | |
599 | ||
600 | ||
601 | /** | |
602 | * mc32_command - send a command and sleep until completion | |
603 | * @dev: The 3c527 card to issue the command to | |
604 | * @cmd: The command word to write to the mailbox | |
605 | * @data: A data block if the command expects one | |
606 | * @len: Length of the data block | |
607 | * | |
608 | * Sends exec commands in a user context. This permits us to wait around | |
609 | * for the replies and also to wait for the command buffer to complete | |
6aa20a22 | 610 | * from a previous command before we execute our command. After our |
1da177e4 LT |
611 | * command completes we will attempt any pending multicast reload |
612 | * we blocked off by hogging the exec buffer. | |
613 | * | |
6aa20a22 | 614 | * You feed the card a command, you wait, it interrupts you get a |
1da177e4 LT |
615 | * reply. All well and good. The complication arises because you use |
616 | * commands for filter list changes which come in at bh level from things | |
617 | * like IPV6 group stuff. | |
618 | */ | |
6aa20a22 | 619 | |
1da177e4 LT |
620 | static int mc32_command(struct net_device *dev, u16 cmd, void *data, int len) |
621 | { | |
622 | struct mc32_local *lp = netdev_priv(dev); | |
623 | int ioaddr = dev->base_addr; | |
624 | int ret = 0; | |
6aa20a22 | 625 | |
1da177e4 LT |
626 | down(&lp->cmd_mutex); |
627 | ||
628 | /* | |
629 | * My Turn | |
630 | */ | |
631 | ||
632 | lp->cmd_nonblocking=0; | |
633 | lp->exec_box->mbox=0; | |
634 | lp->exec_box->mbox=cmd; | |
635 | memcpy((void *)lp->exec_box->data, data, len); | |
636 | barrier(); /* the memcpy forgot the volatile so be sure */ | |
637 | ||
638 | mc32_ready_poll(dev); | |
639 | outb(1<<6, ioaddr+HOST_CMD); | |
640 | ||
641 | wait_for_completion(&lp->execution_cmd); | |
6aa20a22 | 642 | |
1da177e4 LT |
643 | if(lp->exec_box->mbox&(1<<13)) |
644 | ret = -1; | |
645 | ||
646 | up(&lp->cmd_mutex); | |
647 | ||
648 | /* | |
649 | * A multicast set got blocked - try it now | |
650 | */ | |
651 | ||
652 | if(lp->mc_reload_wait) | |
653 | { | |
654 | mc32_reset_multicast_list(dev); | |
655 | } | |
656 | ||
657 | return ret; | |
658 | } | |
659 | ||
660 | ||
661 | /** | |
662 | * mc32_start_transceiver - tell board to restart tx/rx | |
663 | * @dev: The 3c527 card to issue the command to | |
664 | * | |
665 | * This may be called from the interrupt state, where it is used | |
6aa20a22 JG |
666 | * to restart the rx ring if the card runs out of rx buffers. |
667 | * | |
1da177e4 LT |
668 | * We must first check if it's ok to (re)start the transceiver. See |
669 | * mc32_close for details. | |
670 | */ | |
671 | ||
672 | static void mc32_start_transceiver(struct net_device *dev) { | |
673 | ||
674 | struct mc32_local *lp = netdev_priv(dev); | |
675 | int ioaddr = dev->base_addr; | |
676 | ||
6aa20a22 | 677 | /* Ignore RX overflow on device closure */ |
1da177e4 | 678 | if (lp->xceiver_desired_state==HALTED) |
6aa20a22 | 679 | return; |
1da177e4 LT |
680 | |
681 | /* Give the card the offset to the post-EOL-bit RX descriptor */ | |
6aa20a22 | 682 | mc32_ready_poll(dev); |
1da177e4 | 683 | lp->rx_box->mbox=0; |
6aa20a22 JG |
684 | lp->rx_box->data[0]=lp->rx_ring[prev_rx(lp->rx_ring_tail)].p->next; |
685 | outb(HOST_CMD_START_RX, ioaddr+HOST_CMD); | |
1da177e4 | 686 | |
6aa20a22 | 687 | mc32_ready_poll(dev); |
1da177e4 | 688 | lp->tx_box->mbox=0; |
6aa20a22 JG |
689 | outb(HOST_CMD_RESTRT_TX, ioaddr+HOST_CMD); /* card ignores this on RX restart */ |
690 | ||
691 | /* We are not interrupted on start completion */ | |
1da177e4 LT |
692 | } |
693 | ||
694 | ||
695 | /** | |
696 | * mc32_halt_transceiver - tell board to stop tx/rx | |
697 | * @dev: The 3c527 card to issue the command to | |
698 | * | |
699 | * We issue the commands to halt the card's transceiver. In fact, | |
700 | * after some experimenting we now simply tell the card to | |
701 | * suspend. When issuing aborts occasionally odd things happened. | |
702 | * | |
703 | * We then sleep until the card has notified us that both rx and | |
704 | * tx have been suspended. | |
6aa20a22 | 705 | */ |
1da177e4 | 706 | |
6aa20a22 | 707 | static void mc32_halt_transceiver(struct net_device *dev) |
1da177e4 LT |
708 | { |
709 | struct mc32_local *lp = netdev_priv(dev); | |
710 | int ioaddr = dev->base_addr; | |
711 | ||
6aa20a22 | 712 | mc32_ready_poll(dev); |
1da177e4 | 713 | lp->rx_box->mbox=0; |
6aa20a22 | 714 | outb(HOST_CMD_SUSPND_RX, ioaddr+HOST_CMD); |
1da177e4 LT |
715 | wait_for_completion(&lp->xceiver_cmd); |
716 | ||
6aa20a22 | 717 | mc32_ready_poll(dev); |
1da177e4 | 718 | lp->tx_box->mbox=0; |
6aa20a22 | 719 | outb(HOST_CMD_SUSPND_TX, ioaddr+HOST_CMD); |
1da177e4 LT |
720 | wait_for_completion(&lp->xceiver_cmd); |
721 | } | |
722 | ||
723 | ||
724 | /** | |
725 | * mc32_load_rx_ring - load the ring of receive buffers | |
726 | * @dev: 3c527 to build the ring for | |
727 | * | |
728 | * This initalises the on-card and driver datastructures to | |
729 | * the point where mc32_start_transceiver() can be called. | |
730 | * | |
731 | * The card sets up the receive ring for us. We are required to use the | |
732 | * ring it provides, although the size of the ring is configurable. | |
733 | * | |
734 | * We allocate an sk_buff for each ring entry in turn and | |
735 | * initalise its house-keeping info. At the same time, we read | |
736 | * each 'next' pointer in our rx_ring array. This reduces slow | |
737 | * shared-memory reads and makes it easy to access predecessor | |
738 | * descriptors. | |
739 | * | |
740 | * We then set the end-of-list bit for the last entry so that the | |
741 | * card will know when it has run out of buffers. | |
742 | */ | |
6aa20a22 | 743 | |
1da177e4 LT |
744 | static int mc32_load_rx_ring(struct net_device *dev) |
745 | { | |
746 | struct mc32_local *lp = netdev_priv(dev); | |
747 | int i; | |
748 | u16 rx_base; | |
749 | volatile struct skb_header *p; | |
6aa20a22 | 750 | |
1da177e4 LT |
751 | rx_base=lp->rx_chain; |
752 | ||
753 | for(i=0; i<RX_RING_LEN; i++) { | |
754 | lp->rx_ring[i].skb=alloc_skb(1532, GFP_KERNEL); | |
755 | if (lp->rx_ring[i].skb==NULL) { | |
756 | for (;i>=0;i--) | |
757 | kfree_skb(lp->rx_ring[i].skb); | |
758 | return -ENOBUFS; | |
759 | } | |
760 | skb_reserve(lp->rx_ring[i].skb, 18); | |
761 | ||
762 | p=isa_bus_to_virt(lp->base+rx_base); | |
6aa20a22 | 763 | |
1da177e4 LT |
764 | p->control=0; |
765 | p->data=isa_virt_to_bus(lp->rx_ring[i].skb->data); | |
766 | p->status=0; | |
767 | p->length=1532; | |
6aa20a22 JG |
768 | |
769 | lp->rx_ring[i].p=p; | |
770 | rx_base=p->next; | |
1da177e4 LT |
771 | } |
772 | ||
773 | lp->rx_ring[i-1].p->control |= CONTROL_EOL; | |
774 | ||
775 | lp->rx_ring_tail=0; | |
776 | ||
777 | return 0; | |
6aa20a22 | 778 | } |
1da177e4 LT |
779 | |
780 | ||
781 | /** | |
782 | * mc32_flush_rx_ring - free the ring of receive buffers | |
783 | * @lp: Local data of 3c527 to flush the rx ring of | |
784 | * | |
6aa20a22 | 785 | * Free the buffer for each ring slot. This may be called |
1da177e4 LT |
786 | * before mc32_load_rx_ring(), eg. on error in mc32_open(). |
787 | * Requires rx skb pointers to point to a valid skb, or NULL. | |
788 | */ | |
789 | ||
790 | static void mc32_flush_rx_ring(struct net_device *dev) | |
791 | { | |
792 | struct mc32_local *lp = netdev_priv(dev); | |
6aa20a22 | 793 | int i; |
1da177e4 | 794 | |
6aa20a22 JG |
795 | for(i=0; i < RX_RING_LEN; i++) |
796 | { | |
1da177e4 LT |
797 | if (lp->rx_ring[i].skb) { |
798 | dev_kfree_skb(lp->rx_ring[i].skb); | |
799 | lp->rx_ring[i].skb = NULL; | |
800 | } | |
6aa20a22 JG |
801 | lp->rx_ring[i].p=NULL; |
802 | } | |
1da177e4 LT |
803 | } |
804 | ||
805 | ||
806 | /** | |
807 | * mc32_load_tx_ring - load transmit ring | |
808 | * @dev: The 3c527 card to issue the command to | |
809 | * | |
6aa20a22 | 810 | * This sets up the host transmit data-structures. |
1da177e4 LT |
811 | * |
812 | * First, we obtain from the card it's current postion in the tx | |
813 | * ring, so that we will know where to begin transmitting | |
814 | * packets. | |
6aa20a22 | 815 | * |
1da177e4 LT |
816 | * Then, we read the 'next' pointers from the on-card tx ring into |
817 | * our tx_ring array to reduce slow shared-mem reads. Finally, we | |
818 | * intitalise the tx house keeping variables. | |
6aa20a22 JG |
819 | * |
820 | */ | |
1da177e4 LT |
821 | |
822 | static void mc32_load_tx_ring(struct net_device *dev) | |
6aa20a22 | 823 | { |
1da177e4 LT |
824 | struct mc32_local *lp = netdev_priv(dev); |
825 | volatile struct skb_header *p; | |
6aa20a22 | 826 | int i; |
1da177e4 LT |
827 | u16 tx_base; |
828 | ||
6aa20a22 | 829 | tx_base=lp->tx_box->data[0]; |
1da177e4 LT |
830 | |
831 | for(i=0 ; i<TX_RING_LEN ; i++) | |
832 | { | |
833 | p=isa_bus_to_virt(lp->base+tx_base); | |
6aa20a22 | 834 | lp->tx_ring[i].p=p; |
1da177e4 LT |
835 | lp->tx_ring[i].skb=NULL; |
836 | ||
837 | tx_base=p->next; | |
838 | } | |
839 | ||
840 | /* -1 so that tx_ring_head cannot "lap" tx_ring_tail */ | |
841 | /* see mc32_tx_ring */ | |
842 | ||
6aa20a22 JG |
843 | atomic_set(&lp->tx_count, TX_RING_LEN-1); |
844 | atomic_set(&lp->tx_ring_head, 0); | |
845 | lp->tx_ring_tail=0; | |
846 | } | |
1da177e4 LT |
847 | |
848 | ||
849 | /** | |
850 | * mc32_flush_tx_ring - free transmit ring | |
851 | * @lp: Local data of 3c527 to flush the tx ring of | |
852 | * | |
853 | * If the ring is non-empty, zip over the it, freeing any | |
854 | * allocated skb_buffs. The tx ring house-keeping variables are | |
855 | * then reset. Requires rx skb pointers to point to a valid skb, | |
856 | * or NULL. | |
857 | */ | |
858 | ||
859 | static void mc32_flush_tx_ring(struct net_device *dev) | |
860 | { | |
861 | struct mc32_local *lp = netdev_priv(dev); | |
862 | int i; | |
863 | ||
864 | for (i=0; i < TX_RING_LEN; i++) | |
865 | { | |
866 | if (lp->tx_ring[i].skb) | |
867 | { | |
868 | dev_kfree_skb(lp->tx_ring[i].skb); | |
869 | lp->tx_ring[i].skb = NULL; | |
870 | } | |
871 | } | |
872 | ||
6aa20a22 JG |
873 | atomic_set(&lp->tx_count, 0); |
874 | atomic_set(&lp->tx_ring_head, 0); | |
1da177e4 LT |
875 | lp->tx_ring_tail=0; |
876 | } | |
6aa20a22 | 877 | |
1da177e4 LT |
878 | |
879 | /** | |
880 | * mc32_open - handle 'up' of card | |
881 | * @dev: device to open | |
882 | * | |
883 | * The user is trying to bring the card into ready state. This requires | |
884 | * a brief dialogue with the card. Firstly we enable interrupts and then | |
885 | * 'indications'. Without these enabled the card doesn't bother telling | |
886 | * us what it has done. This had me puzzled for a week. | |
887 | * | |
888 | * We configure the number of card descriptors, then load the network | |
889 | * address and multicast filters. Turn on the workaround mode. This | |
890 | * works around a bug in the 82586 - it asks the firmware to do | |
891 | * so. It has a performance (latency) hit but is needed on busy | |
892 | * [read most] lans. We load the ring with buffers then we kick it | |
893 | * all off. | |
894 | */ | |
895 | ||
896 | static int mc32_open(struct net_device *dev) | |
897 | { | |
898 | int ioaddr = dev->base_addr; | |
899 | struct mc32_local *lp = netdev_priv(dev); | |
900 | u8 one=1; | |
901 | u8 regs; | |
902 | u16 descnumbuffs[2] = {TX_RING_LEN, RX_RING_LEN}; | |
903 | ||
904 | /* | |
905 | * Interrupts enabled | |
906 | */ | |
907 | ||
908 | regs=inb(ioaddr+HOST_CTRL); | |
909 | regs|=HOST_CTRL_INTE; | |
910 | outb(regs, ioaddr+HOST_CTRL); | |
6aa20a22 | 911 | |
1da177e4 LT |
912 | /* |
913 | * Allow ourselves to issue commands | |
914 | */ | |
915 | ||
916 | up(&lp->cmd_mutex); | |
917 | ||
918 | ||
919 | /* | |
920 | * Send the indications on command | |
921 | */ | |
922 | ||
923 | mc32_command(dev, 4, &one, 2); | |
924 | ||
925 | /* | |
6aa20a22 | 926 | * Poke it to make sure it's really dead. |
1da177e4 LT |
927 | */ |
928 | ||
6aa20a22 JG |
929 | mc32_halt_transceiver(dev); |
930 | mc32_flush_tx_ring(dev); | |
1da177e4 | 931 | |
6aa20a22 JG |
932 | /* |
933 | * Ask card to set up on-card descriptors to our spec | |
934 | */ | |
1da177e4 | 935 | |
6aa20a22 | 936 | if(mc32_command(dev, 8, descnumbuffs, 4)) { |
1da177e4 LT |
937 | printk("%s: %s rejected our buffer configuration!\n", |
938 | dev->name, cardname); | |
6aa20a22 JG |
939 | mc32_close(dev); |
940 | return -ENOBUFS; | |
1da177e4 | 941 | } |
6aa20a22 JG |
942 | |
943 | /* Report new configuration */ | |
944 | mc32_command(dev, 6, NULL, 0); | |
1da177e4 LT |
945 | |
946 | lp->tx_chain = lp->exec_box->data[8]; /* Transmit list start offset */ | |
947 | lp->rx_chain = lp->exec_box->data[10]; /* Receive list start offset */ | |
6aa20a22 | 948 | lp->tx_len = lp->exec_box->data[9]; /* Transmit list count */ |
1da177e4 | 949 | lp->rx_len = lp->exec_box->data[11]; /* Receive list count */ |
6aa20a22 | 950 | |
1da177e4 LT |
951 | /* Set Network Address */ |
952 | mc32_command(dev, 1, dev->dev_addr, 6); | |
6aa20a22 | 953 | |
1da177e4 LT |
954 | /* Set the filters */ |
955 | mc32_set_multicast_list(dev); | |
6aa20a22 JG |
956 | |
957 | if (WORKAROUND_82586) { | |
1da177e4 LT |
958 | u16 zero_word=0; |
959 | mc32_command(dev, 0x0D, &zero_word, 2); /* 82586 bug workaround on */ | |
960 | } | |
961 | ||
962 | mc32_load_tx_ring(dev); | |
6aa20a22 JG |
963 | |
964 | if(mc32_load_rx_ring(dev)) | |
1da177e4 LT |
965 | { |
966 | mc32_close(dev); | |
967 | return -ENOBUFS; | |
968 | } | |
969 | ||
970 | lp->xceiver_desired_state = RUNNING; | |
6aa20a22 | 971 | |
1da177e4 LT |
972 | /* And finally, set the ball rolling... */ |
973 | mc32_start_transceiver(dev); | |
974 | ||
975 | netif_start_queue(dev); | |
976 | ||
977 | return 0; | |
978 | } | |
979 | ||
980 | ||
981 | /** | |
982 | * mc32_timeout - handle a timeout from the network layer | |
983 | * @dev: 3c527 that timed out | |
984 | * | |
985 | * Handle a timeout on transmit from the 3c527. This normally means | |
986 | * bad things as the hardware handles cable timeouts and mess for | |
987 | * us. | |
988 | * | |
989 | */ | |
990 | ||
991 | static void mc32_timeout(struct net_device *dev) | |
992 | { | |
993 | printk(KERN_WARNING "%s: transmit timed out?\n", dev->name); | |
994 | /* Try to restart the adaptor. */ | |
995 | netif_wake_queue(dev); | |
996 | } | |
997 | ||
998 | ||
999 | /** | |
1000 | * mc32_send_packet - queue a frame for transmit | |
1001 | * @skb: buffer to transmit | |
1002 | * @dev: 3c527 to send it out of | |
1003 | * | |
1004 | * Transmit a buffer. This normally means throwing the buffer onto | |
1005 | * the transmit queue as the queue is quite large. If the queue is | |
1006 | * full then we set tx_busy and return. Once the interrupt handler | |
1007 | * gets messages telling it to reclaim transmit queue entries, we will | |
1008 | * clear tx_busy and the kernel will start calling this again. | |
1009 | * | |
1010 | * We do not disable interrupts or acquire any locks; this can | |
1011 | * run concurrently with mc32_tx_ring(), and the function itself | |
1012 | * is serialised at a higher layer. However, similarly for the | |
1013 | * card itself, we must ensure that we update tx_ring_head only | |
1014 | * after we've established a valid packet on the tx ring (and | |
1015 | * before we let the card "see" it, to prevent it racing with the | |
1016 | * irq handler). | |
6aa20a22 | 1017 | * |
1da177e4 LT |
1018 | */ |
1019 | ||
1020 | static int mc32_send_packet(struct sk_buff *skb, struct net_device *dev) | |
1021 | { | |
1022 | struct mc32_local *lp = netdev_priv(dev); | |
1023 | u32 head = atomic_read(&lp->tx_ring_head); | |
6aa20a22 | 1024 | |
1da177e4 LT |
1025 | volatile struct skb_header *p, *np; |
1026 | ||
1027 | netif_stop_queue(dev); | |
1028 | ||
1029 | if(atomic_read(&lp->tx_count)==0) { | |
1030 | return 1; | |
1031 | } | |
1032 | ||
5b057c6b | 1033 | if (skb_padto(skb, ETH_ZLEN)) { |
1da177e4 LT |
1034 | netif_wake_queue(dev); |
1035 | return 0; | |
1036 | } | |
1037 | ||
6aa20a22 | 1038 | atomic_dec(&lp->tx_count); |
1da177e4 LT |
1039 | |
1040 | /* P is the last sending/sent buffer as a pointer */ | |
1041 | p=lp->tx_ring[head].p; | |
6aa20a22 | 1042 | |
1da177e4 LT |
1043 | head = next_tx(head); |
1044 | ||
1045 | /* NP is the buffer we will be loading */ | |
6aa20a22 JG |
1046 | np=lp->tx_ring[head].p; |
1047 | ||
1da177e4 LT |
1048 | /* We will need this to flush the buffer out */ |
1049 | lp->tx_ring[head].skb=skb; | |
1050 | ||
6aa20a22 | 1051 | np->length = unlikely(skb->len < ETH_ZLEN) ? ETH_ZLEN : skb->len; |
1da177e4 LT |
1052 | np->data = isa_virt_to_bus(skb->data); |
1053 | np->status = 0; | |
6aa20a22 | 1054 | np->control = CONTROL_EOP | CONTROL_EOL; |
1da177e4 | 1055 | wmb(); |
6aa20a22 | 1056 | |
1da177e4 LT |
1057 | /* |
1058 | * The new frame has been setup; we can now | |
1059 | * let the interrupt handler and card "see" it | |
1060 | */ | |
1061 | ||
6aa20a22 | 1062 | atomic_set(&lp->tx_ring_head, head); |
1da177e4 LT |
1063 | p->control &= ~CONTROL_EOL; |
1064 | ||
1065 | netif_wake_queue(dev); | |
1066 | return 0; | |
1067 | } | |
1068 | ||
1069 | ||
1070 | /** | |
1071 | * mc32_update_stats - pull off the on board statistics | |
1072 | * @dev: 3c527 to service | |
1073 | * | |
6aa20a22 | 1074 | * |
1da177e4 LT |
1075 | * Query and reset the on-card stats. There's the small possibility |
1076 | * of a race here, which would result in an underestimation of | |
1077 | * actual errors. As such, we'd prefer to keep all our stats | |
1078 | * collection in software. As a rule, we do. However it can't be | |
1079 | * used for rx errors and collisions as, by default, the card discards | |
6aa20a22 | 1080 | * bad rx packets. |
1da177e4 LT |
1081 | * |
1082 | * Setting the SAV BP in the rx filter command supposedly | |
1083 | * stops this behaviour. However, testing shows that it only seems to | |
1084 | * enable the collation of on-card rx statistics --- the driver | |
1085 | * never sees an RX descriptor with an error status set. | |
1086 | * | |
1087 | */ | |
1088 | ||
1089 | static void mc32_update_stats(struct net_device *dev) | |
1090 | { | |
1091 | struct mc32_local *lp = netdev_priv(dev); | |
6aa20a22 | 1092 | volatile struct mc32_stats *st = lp->stats; |
1da177e4 | 1093 | |
6aa20a22 JG |
1094 | u32 rx_errors=0; |
1095 | ||
1096 | rx_errors+=lp->net_stats.rx_crc_errors +=st->rx_crc_errors; | |
1da177e4 | 1097 | st->rx_crc_errors=0; |
6aa20a22 JG |
1098 | rx_errors+=lp->net_stats.rx_fifo_errors +=st->rx_overrun_errors; |
1099 | st->rx_overrun_errors=0; | |
1100 | rx_errors+=lp->net_stats.rx_frame_errors +=st->rx_alignment_errors; | |
1da177e4 | 1101 | st->rx_alignment_errors=0; |
6aa20a22 | 1102 | rx_errors+=lp->net_stats.rx_length_errors+=st->rx_tooshort_errors; |
1da177e4 LT |
1103 | st->rx_tooshort_errors=0; |
1104 | rx_errors+=lp->net_stats.rx_missed_errors+=st->rx_outofresource_errors; | |
6aa20a22 JG |
1105 | st->rx_outofresource_errors=0; |
1106 | lp->net_stats.rx_errors=rx_errors; | |
1107 | ||
1da177e4 LT |
1108 | /* Number of packets which saw one collision */ |
1109 | lp->net_stats.collisions+=st->dataC[10]; | |
6aa20a22 | 1110 | st->dataC[10]=0; |
1da177e4 | 1111 | |
6aa20a22 JG |
1112 | /* Number of packets which saw 2--15 collisions */ |
1113 | lp->net_stats.collisions+=st->dataC[11]; | |
1114 | st->dataC[11]=0; | |
1115 | } | |
1da177e4 LT |
1116 | |
1117 | ||
1118 | /** | |
1119 | * mc32_rx_ring - process the receive ring | |
1120 | * @dev: 3c527 that needs its receive ring processing | |
1121 | * | |
1122 | * | |
1123 | * We have received one or more indications from the card that a | |
1124 | * receive has completed. The buffer ring thus contains dirty | |
1125 | * entries. We walk the ring by iterating over the circular rx_ring | |
1126 | * array, starting at the next dirty buffer (which happens to be the | |
1127 | * one we finished up at last time around). | |
1128 | * | |
1129 | * For each completed packet, we will either copy it and pass it up | |
1130 | * the stack or, if the packet is near MTU sized, we allocate | |
1131 | * another buffer and flip the old one up the stack. | |
6aa20a22 | 1132 | * |
1da177e4 LT |
1133 | * We must succeed in keeping a buffer on the ring. If necessary we |
1134 | * will toss a received packet rather than lose a ring entry. Once | |
1135 | * the first uncompleted descriptor is found, we move the | |
1136 | * End-Of-List bit to include the buffers just processed. | |
1137 | * | |
1138 | */ | |
1139 | ||
1140 | static void mc32_rx_ring(struct net_device *dev) | |
1141 | { | |
1142 | struct mc32_local *lp = netdev_priv(dev); | |
1143 | volatile struct skb_header *p; | |
1144 | u16 rx_ring_tail; | |
1145 | u16 rx_old_tail; | |
1146 | int x=0; | |
1147 | ||
1148 | rx_old_tail = rx_ring_tail = lp->rx_ring_tail; | |
6aa20a22 | 1149 | |
1da177e4 | 1150 | do |
6aa20a22 JG |
1151 | { |
1152 | p=lp->rx_ring[rx_ring_tail].p; | |
1da177e4 | 1153 | |
6aa20a22 | 1154 | if(!(p->status & (1<<7))) { /* Not COMPLETED */ |
1da177e4 | 1155 | break; |
6aa20a22 | 1156 | } |
1da177e4 | 1157 | if(p->status & (1<<6)) /* COMPLETED_OK */ |
6aa20a22 | 1158 | { |
1da177e4 LT |
1159 | |
1160 | u16 length=p->length; | |
6aa20a22 JG |
1161 | struct sk_buff *skb; |
1162 | struct sk_buff *newskb; | |
1da177e4 LT |
1163 | |
1164 | /* Try to save time by avoiding a copy on big frames */ | |
1165 | ||
6aa20a22 JG |
1166 | if ((length > RX_COPYBREAK) |
1167 | && ((newskb=dev_alloc_skb(1532)) != NULL)) | |
1168 | { | |
1da177e4 LT |
1169 | skb=lp->rx_ring[rx_ring_tail].skb; |
1170 | skb_put(skb, length); | |
6aa20a22 JG |
1171 | |
1172 | skb_reserve(newskb,18); | |
1173 | lp->rx_ring[rx_ring_tail].skb=newskb; | |
1174 | p->data=isa_virt_to_bus(newskb->data); | |
1175 | } | |
1176 | else | |
1da177e4 | 1177 | { |
6aa20a22 | 1178 | skb=dev_alloc_skb(length+2); |
1da177e4 LT |
1179 | |
1180 | if(skb==NULL) { | |
6aa20a22 JG |
1181 | lp->net_stats.rx_dropped++; |
1182 | goto dropped; | |
1da177e4 LT |
1183 | } |
1184 | ||
1185 | skb_reserve(skb,2); | |
1186 | memcpy(skb_put(skb, length), | |
1187 | lp->rx_ring[rx_ring_tail].skb->data, length); | |
1188 | } | |
6aa20a22 JG |
1189 | |
1190 | skb->protocol=eth_type_trans(skb,dev); | |
1da177e4 | 1191 | dev->last_rx = jiffies; |
6aa20a22 JG |
1192 | lp->net_stats.rx_packets++; |
1193 | lp->net_stats.rx_bytes += length; | |
1da177e4 LT |
1194 | netif_rx(skb); |
1195 | } | |
1196 | ||
1197 | dropped: | |
6aa20a22 | 1198 | p->length = 1532; |
1da177e4 | 1199 | p->status = 0; |
6aa20a22 JG |
1200 | |
1201 | rx_ring_tail=next_rx(rx_ring_tail); | |
1da177e4 | 1202 | } |
6aa20a22 | 1203 | while(x++<48); |
1da177e4 | 1204 | |
6aa20a22 JG |
1205 | /* If there was actually a frame to be processed, place the EOL bit */ |
1206 | /* at the descriptor prior to the one to be filled next */ | |
1da177e4 | 1207 | |
6aa20a22 JG |
1208 | if (rx_ring_tail != rx_old_tail) |
1209 | { | |
1210 | lp->rx_ring[prev_rx(rx_ring_tail)].p->control |= CONTROL_EOL; | |
1211 | lp->rx_ring[prev_rx(rx_old_tail)].p->control &= ~CONTROL_EOL; | |
1da177e4 | 1212 | |
6aa20a22 | 1213 | lp->rx_ring_tail=rx_ring_tail; |
1da177e4 LT |
1214 | } |
1215 | } | |
1216 | ||
1217 | ||
1218 | /** | |
1219 | * mc32_tx_ring - process completed transmits | |
1220 | * @dev: 3c527 that needs its transmit ring processing | |
1221 | * | |
1222 | * | |
1223 | * This operates in a similar fashion to mc32_rx_ring. We iterate | |
1224 | * over the transmit ring. For each descriptor which has been | |
1225 | * processed by the card, we free its associated buffer and note | |
1226 | * any errors. This continues until the transmit ring is emptied | |
1227 | * or we reach a descriptor that hasn't yet been processed by the | |
1228 | * card. | |
6aa20a22 | 1229 | * |
1da177e4 LT |
1230 | */ |
1231 | ||
6aa20a22 | 1232 | static void mc32_tx_ring(struct net_device *dev) |
1da177e4 LT |
1233 | { |
1234 | struct mc32_local *lp = netdev_priv(dev); | |
1235 | volatile struct skb_header *np; | |
1236 | ||
1237 | /* | |
1238 | * We rely on head==tail to mean 'queue empty'. | |
1239 | * This is why lp->tx_count=TX_RING_LEN-1: in order to prevent | |
1240 | * tx_ring_head wrapping to tail and confusing a 'queue empty' | |
1241 | * condition with 'queue full' | |
1242 | */ | |
1243 | ||
6aa20a22 JG |
1244 | while (lp->tx_ring_tail != atomic_read(&lp->tx_ring_head)) |
1245 | { | |
1246 | u16 t; | |
1da177e4 | 1247 | |
6aa20a22 JG |
1248 | t=next_tx(lp->tx_ring_tail); |
1249 | np=lp->tx_ring[t].p; | |
1da177e4 | 1250 | |
6aa20a22 | 1251 | if(!(np->status & (1<<7))) |
1da177e4 | 1252 | { |
6aa20a22 JG |
1253 | /* Not COMPLETED */ |
1254 | break; | |
1255 | } | |
1da177e4 LT |
1256 | lp->net_stats.tx_packets++; |
1257 | if(!(np->status & (1<<6))) /* Not COMPLETED_OK */ | |
1258 | { | |
6aa20a22 | 1259 | lp->net_stats.tx_errors++; |
1da177e4 LT |
1260 | |
1261 | switch(np->status&0x0F) | |
1262 | { | |
1263 | case 1: | |
1264 | lp->net_stats.tx_aborted_errors++; | |
6aa20a22 | 1265 | break; /* Max collisions */ |
1da177e4 LT |
1266 | case 2: |
1267 | lp->net_stats.tx_fifo_errors++; | |
1268 | break; | |
1269 | case 3: | |
1270 | lp->net_stats.tx_carrier_errors++; | |
1271 | break; | |
1272 | case 4: | |
1273 | lp->net_stats.tx_window_errors++; | |
6aa20a22 | 1274 | break; /* CTS Lost */ |
1da177e4 LT |
1275 | case 5: |
1276 | lp->net_stats.tx_aborted_errors++; | |
6aa20a22 | 1277 | break; /* Transmit timeout */ |
1da177e4 LT |
1278 | } |
1279 | } | |
1280 | /* Packets are sent in order - this is | |
1281 | basically a FIFO queue of buffers matching | |
1282 | the card ring */ | |
1283 | lp->net_stats.tx_bytes+=lp->tx_ring[t].skb->len; | |
1284 | dev_kfree_skb_irq(lp->tx_ring[t].skb); | |
1285 | lp->tx_ring[t].skb=NULL; | |
1286 | atomic_inc(&lp->tx_count); | |
1287 | netif_wake_queue(dev); | |
1288 | ||
6aa20a22 | 1289 | lp->tx_ring_tail=t; |
1da177e4 LT |
1290 | } |
1291 | ||
6aa20a22 | 1292 | } |
1da177e4 LT |
1293 | |
1294 | ||
1295 | /** | |
1296 | * mc32_interrupt - handle an interrupt from a 3c527 | |
1297 | * @irq: Interrupt number | |
1298 | * @dev_id: 3c527 that requires servicing | |
1299 | * @regs: Registers (unused) | |
1300 | * | |
1301 | * | |
1302 | * An interrupt is raised whenever the 3c527 writes to the command | |
1303 | * register. This register contains the message it wishes to send us | |
1304 | * packed into a single byte field. We keep reading status entries | |
1305 | * until we have processed all the control items, but simply count | |
1306 | * transmit and receive reports. When all reports are in we empty the | |
1307 | * transceiver rings as appropriate. This saves the overhead of | |
1308 | * multiple command requests. | |
1309 | * | |
1310 | * Because MCA is level-triggered, we shouldn't miss indications. | |
1311 | * Therefore, we needn't ask the card to suspend interrupts within | |
1312 | * this handler. The card receives an implicit acknowledgment of the | |
1313 | * current interrupt when we read the command register. | |
1314 | * | |
1315 | */ | |
1316 | ||
7d12e780 | 1317 | static irqreturn_t mc32_interrupt(int irq, void *dev_id) |
1da177e4 LT |
1318 | { |
1319 | struct net_device *dev = dev_id; | |
1320 | struct mc32_local *lp; | |
1321 | int ioaddr, status, boguscount = 0; | |
1322 | int rx_event = 0; | |
6aa20a22 JG |
1323 | int tx_event = 0; |
1324 | ||
1da177e4 LT |
1325 | ioaddr = dev->base_addr; |
1326 | lp = netdev_priv(dev); | |
1327 | ||
1328 | /* See whats cooking */ | |
1329 | ||
1330 | while((inb(ioaddr+HOST_STATUS)&HOST_STATUS_CWR) && boguscount++<2000) | |
1331 | { | |
1332 | status=inb(ioaddr+HOST_CMD); | |
1333 | ||
6aa20a22 | 1334 | #ifdef DEBUG_IRQ |
1da177e4 LT |
1335 | printk("Status TX%d RX%d EX%d OV%d BC%d\n", |
1336 | (status&7), (status>>3)&7, (status>>6)&1, | |
1337 | (status>>7)&1, boguscount); | |
1338 | #endif | |
6aa20a22 | 1339 | |
1da177e4 LT |
1340 | switch(status&7) |
1341 | { | |
1342 | case 0: | |
1343 | break; | |
1344 | case 6: /* TX fail */ | |
1345 | case 2: /* TX ok */ | |
6aa20a22 | 1346 | tx_event = 1; |
1da177e4 LT |
1347 | break; |
1348 | case 3: /* Halt */ | |
1349 | case 4: /* Abort */ | |
1350 | complete(&lp->xceiver_cmd); | |
1351 | break; | |
1352 | default: | |
1353 | printk("%s: strange tx ack %d\n", dev->name, status&7); | |
1354 | } | |
1355 | status>>=3; | |
1356 | switch(status&7) | |
1357 | { | |
1358 | case 0: | |
1359 | break; | |
1360 | case 2: /* RX */ | |
6aa20a22 | 1361 | rx_event=1; |
1da177e4 LT |
1362 | break; |
1363 | case 3: /* Halt */ | |
1364 | case 4: /* Abort */ | |
1365 | complete(&lp->xceiver_cmd); | |
1366 | break; | |
1367 | case 6: | |
1368 | /* Out of RX buffers stat */ | |
1369 | /* Must restart rx */ | |
1370 | lp->net_stats.rx_dropped++; | |
6aa20a22 JG |
1371 | mc32_rx_ring(dev); |
1372 | mc32_start_transceiver(dev); | |
1da177e4 LT |
1373 | break; |
1374 | default: | |
6aa20a22 JG |
1375 | printk("%s: strange rx ack %d\n", |
1376 | dev->name, status&7); | |
1da177e4 LT |
1377 | } |
1378 | status>>=3; | |
1379 | if(status&1) | |
1380 | { | |
1381 | /* | |
1382 | * No thread is waiting: we need to tidy | |
1383 | * up ourself. | |
1384 | */ | |
6aa20a22 | 1385 | |
1da177e4 LT |
1386 | if (lp->cmd_nonblocking) { |
1387 | up(&lp->cmd_mutex); | |
6aa20a22 | 1388 | if (lp->mc_reload_wait) |
1da177e4 LT |
1389 | mc32_reset_multicast_list(dev); |
1390 | } | |
1391 | else complete(&lp->execution_cmd); | |
1392 | } | |
1393 | if(status&2) | |
1394 | { | |
1395 | /* | |
1396 | * We get interrupted once per | |
6aa20a22 | 1397 | * counter that is about to overflow. |
1da177e4 LT |
1398 | */ |
1399 | ||
6aa20a22 | 1400 | mc32_update_stats(dev); |
1da177e4 LT |
1401 | } |
1402 | } | |
1403 | ||
1404 | ||
1405 | /* | |
6aa20a22 | 1406 | * Process the transmit and receive rings |
1da177e4 LT |
1407 | */ |
1408 | ||
6aa20a22 | 1409 | if(tx_event) |
1da177e4 | 1410 | mc32_tx_ring(dev); |
6aa20a22 JG |
1411 | |
1412 | if(rx_event) | |
1da177e4 LT |
1413 | mc32_rx_ring(dev); |
1414 | ||
1415 | return IRQ_HANDLED; | |
1416 | } | |
1417 | ||
1418 | ||
1419 | /** | |
1420 | * mc32_close - user configuring the 3c527 down | |
1421 | * @dev: 3c527 card to shut down | |
1422 | * | |
1423 | * The 3c527 is a bus mastering device. We must be careful how we | |
1424 | * shut it down. It may also be running shared interrupt so we have | |
1425 | * to be sure to silence it properly | |
1426 | * | |
1427 | * We indicate that the card is closing to the rest of the | |
1428 | * driver. Otherwise, it is possible that the card may run out | |
1429 | * of receive buffers and restart the transceiver while we're | |
1430 | * trying to close it. | |
6aa20a22 | 1431 | * |
1da177e4 LT |
1432 | * We abort any receive and transmits going on and then wait until |
1433 | * any pending exec commands have completed in other code threads. | |
1434 | * In theory we can't get here while that is true, in practice I am | |
1435 | * paranoid | |
1436 | * | |
1437 | * We turn off the interrupt enable for the board to be sure it can't | |
1438 | * intefere with other devices. | |
1439 | */ | |
1440 | ||
1441 | static int mc32_close(struct net_device *dev) | |
1442 | { | |
1443 | struct mc32_local *lp = netdev_priv(dev); | |
1444 | int ioaddr = dev->base_addr; | |
1445 | ||
1446 | u8 regs; | |
1447 | u16 one=1; | |
6aa20a22 | 1448 | |
1da177e4 LT |
1449 | lp->xceiver_desired_state = HALTED; |
1450 | netif_stop_queue(dev); | |
1451 | ||
1452 | /* | |
1453 | * Send the indications on command (handy debug check) | |
1454 | */ | |
1455 | ||
1456 | mc32_command(dev, 4, &one, 2); | |
1457 | ||
1458 | /* Shut down the transceiver */ | |
1459 | ||
6aa20a22 JG |
1460 | mc32_halt_transceiver(dev); |
1461 | ||
1da177e4 LT |
1462 | /* Ensure we issue no more commands beyond this point */ |
1463 | ||
1464 | down(&lp->cmd_mutex); | |
6aa20a22 JG |
1465 | |
1466 | /* Ok the card is now stopping */ | |
1467 | ||
1da177e4 LT |
1468 | regs=inb(ioaddr+HOST_CTRL); |
1469 | regs&=~HOST_CTRL_INTE; | |
1470 | outb(regs, ioaddr+HOST_CTRL); | |
1471 | ||
1472 | mc32_flush_rx_ring(dev); | |
1473 | mc32_flush_tx_ring(dev); | |
6aa20a22 JG |
1474 | |
1475 | mc32_update_stats(dev); | |
1da177e4 LT |
1476 | |
1477 | return 0; | |
1478 | } | |
1479 | ||
1480 | ||
1481 | /** | |
1482 | * mc32_get_stats - hand back stats to network layer | |
1483 | * @dev: The 3c527 card to handle | |
1484 | * | |
1485 | * We've collected all the stats we can in software already. Now | |
6aa20a22 JG |
1486 | * it's time to update those kept on-card and return the lot. |
1487 | * | |
1da177e4 LT |
1488 | */ |
1489 | ||
1490 | static struct net_device_stats *mc32_get_stats(struct net_device *dev) | |
1491 | { | |
1492 | struct mc32_local *lp = netdev_priv(dev); | |
6aa20a22 JG |
1493 | |
1494 | mc32_update_stats(dev); | |
1da177e4 LT |
1495 | return &lp->net_stats; |
1496 | } | |
1497 | ||
1498 | ||
1499 | /** | |
1500 | * do_mc32_set_multicast_list - attempt to update multicasts | |
1501 | * @dev: 3c527 device to load the list on | |
6aa20a22 | 1502 | * @retry: indicates this is not the first call. |
1da177e4 LT |
1503 | * |
1504 | * | |
1505 | * Actually set or clear the multicast filter for this adaptor. The | |
1506 | * locking issues are handled by this routine. We have to track | |
1507 | * state as it may take multiple calls to get the command sequence | |
1508 | * completed. We just keep trying to schedule the loads until we | |
1509 | * manage to process them all. | |
6aa20a22 | 1510 | * |
1da177e4 | 1511 | * num_addrs == -1 Promiscuous mode, receive all packets |
6aa20a22 | 1512 | * |
1da177e4 | 1513 | * num_addrs == 0 Normal mode, clear multicast list |
1da177e4 | 1514 | * |
6aa20a22 JG |
1515 | * num_addrs > 0 Multicast mode, receive normal and MC packets, |
1516 | * and do best-effort filtering. | |
1517 | * | |
1518 | * See mc32_update_stats() regards setting the SAV BP bit. | |
1da177e4 LT |
1519 | * |
1520 | */ | |
1521 | ||
1522 | static void do_mc32_set_multicast_list(struct net_device *dev, int retry) | |
1523 | { | |
1524 | struct mc32_local *lp = netdev_priv(dev); | |
6aa20a22 | 1525 | u16 filt = (1<<2); /* Save Bad Packets, for stats purposes */ |
1da177e4 LT |
1526 | |
1527 | if (dev->flags&IFF_PROMISC) | |
1528 | /* Enable promiscuous mode */ | |
1529 | filt |= 1; | |
1530 | else if((dev->flags&IFF_ALLMULTI) || dev->mc_count > 10) | |
1531 | { | |
1532 | dev->flags|=IFF_PROMISC; | |
1533 | filt |= 1; | |
1534 | } | |
1535 | else if(dev->mc_count) | |
1536 | { | |
1537 | unsigned char block[62]; | |
1538 | unsigned char *bp; | |
1539 | struct dev_mc_list *dmc=dev->mc_list; | |
6aa20a22 | 1540 | |
1da177e4 | 1541 | int i; |
6aa20a22 | 1542 | |
1da177e4 LT |
1543 | if(retry==0) |
1544 | lp->mc_list_valid = 0; | |
1545 | if(!lp->mc_list_valid) | |
1546 | { | |
1547 | block[1]=0; | |
1548 | block[0]=dev->mc_count; | |
1549 | bp=block+2; | |
6aa20a22 | 1550 | |
1da177e4 LT |
1551 | for(i=0;i<dev->mc_count;i++) |
1552 | { | |
1553 | memcpy(bp, dmc->dmi_addr, 6); | |
1554 | bp+=6; | |
1555 | dmc=dmc->next; | |
1556 | } | |
1557 | if(mc32_command_nowait(dev, 2, block, 2+6*dev->mc_count)==-1) | |
1558 | { | |
1559 | lp->mc_reload_wait = 1; | |
1560 | return; | |
1561 | } | |
1562 | lp->mc_list_valid=1; | |
1563 | } | |
1564 | } | |
6aa20a22 JG |
1565 | |
1566 | if(mc32_command_nowait(dev, 0, &filt, 2)==-1) | |
1da177e4 LT |
1567 | { |
1568 | lp->mc_reload_wait = 1; | |
6aa20a22 JG |
1569 | } |
1570 | else { | |
1da177e4 LT |
1571 | lp->mc_reload_wait = 0; |
1572 | } | |
1573 | } | |
1574 | ||
1575 | ||
1576 | /** | |
1577 | * mc32_set_multicast_list - queue multicast list update | |
1578 | * @dev: The 3c527 to use | |
1579 | * | |
1580 | * Commence loading the multicast list. This is called when the kernel | |
1581 | * changes the lists. It will override any pending list we are trying to | |
1582 | * load. | |
1583 | */ | |
1584 | ||
1585 | static void mc32_set_multicast_list(struct net_device *dev) | |
1586 | { | |
1587 | do_mc32_set_multicast_list(dev,0); | |
1588 | } | |
1589 | ||
1590 | ||
1591 | /** | |
1592 | * mc32_reset_multicast_list - reset multicast list | |
1593 | * @dev: The 3c527 to use | |
1594 | * | |
1595 | * Attempt the next step in loading the multicast lists. If this attempt | |
1596 | * fails to complete then it will be scheduled and this function called | |
1597 | * again later from elsewhere. | |
1598 | */ | |
1599 | ||
1600 | static void mc32_reset_multicast_list(struct net_device *dev) | |
1601 | { | |
1602 | do_mc32_set_multicast_list(dev,1); | |
1603 | } | |
1604 | ||
1605 | static void netdev_get_drvinfo(struct net_device *dev, | |
1606 | struct ethtool_drvinfo *info) | |
1607 | { | |
1608 | strcpy(info->driver, DRV_NAME); | |
1609 | strcpy(info->version, DRV_VERSION); | |
1610 | sprintf(info->bus_info, "MCA 0x%lx", dev->base_addr); | |
1611 | } | |
1612 | ||
1613 | static u32 netdev_get_msglevel(struct net_device *dev) | |
1614 | { | |
1615 | return mc32_debug; | |
1616 | } | |
1617 | ||
1618 | static void netdev_set_msglevel(struct net_device *dev, u32 level) | |
1619 | { | |
1620 | mc32_debug = level; | |
1621 | } | |
1622 | ||
7282d491 | 1623 | static const struct ethtool_ops netdev_ethtool_ops = { |
1da177e4 LT |
1624 | .get_drvinfo = netdev_get_drvinfo, |
1625 | .get_msglevel = netdev_get_msglevel, | |
1626 | .set_msglevel = netdev_set_msglevel, | |
1627 | }; | |
1628 | ||
1629 | #ifdef MODULE | |
1630 | ||
1631 | static struct net_device *this_device; | |
1632 | ||
1633 | /** | |
1634 | * init_module - entry point | |
1635 | * | |
1636 | * Probe and locate a 3c527 card. This really should probe and locate | |
1637 | * all the 3c527 cards in the machine not just one of them. Yes you can | |
1638 | * insmod multiple modules for now but it's a hack. | |
1639 | */ | |
1640 | ||
96e672c7 | 1641 | int __init init_module(void) |
1da177e4 LT |
1642 | { |
1643 | this_device = mc32_probe(-1); | |
1644 | if (IS_ERR(this_device)) | |
1645 | return PTR_ERR(this_device); | |
1646 | return 0; | |
1647 | } | |
1648 | ||
1649 | /** | |
1650 | * cleanup_module - free resources for an unload | |
1651 | * | |
1652 | * Unloading time. We release the MCA bus resources and the interrupt | |
1653 | * at which point everything is ready to unload. The card must be stopped | |
1654 | * at this point or we would not have been called. When we unload we | |
1655 | * leave the card stopped but not totally shut down. When the card is | |
1656 | * initialized it must be rebooted or the rings reloaded before any | |
1657 | * transmit operations are allowed to start scribbling into memory. | |
1658 | */ | |
1659 | ||
afc8eb46 | 1660 | void __exit cleanup_module(void) |
1da177e4 LT |
1661 | { |
1662 | unregister_netdev(this_device); | |
1663 | cleanup_card(this_device); | |
1664 | free_netdev(this_device); | |
1665 | } | |
1666 | ||
1667 | #endif /* MODULE */ |