Commit | Line | Data |
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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 | ||
1da177e4 LT |
128 | static unsigned int mc32_debug = NET_DEBUG; |
129 | ||
130 | /* The number of low I/O ports used by the ethercard. */ | |
131 | #define MC32_IO_EXTENT 8 | |
132 | ||
6aa20a22 | 133 | /* As implemented, values must be a power-of-2 -- 4/8/16/32 */ |
1da177e4 LT |
134 | #define TX_RING_LEN 32 /* Typically the card supports 37 */ |
135 | #define RX_RING_LEN 8 /* " " " */ | |
136 | ||
6aa20a22 JG |
137 | /* Copy break point, see above for details. |
138 | * Setting to > 1512 effectively disables this feature. */ | |
1da177e4 LT |
139 | #define RX_COPYBREAK 200 /* Value from 3c59x.c */ |
140 | ||
141 | /* Issue the 82586 workaround command - this is for "busy lans", but | |
6aa20a22 JG |
142 | * basically means for all lans now days - has a performance (latency) |
143 | * cost, but best set. */ | |
1da177e4 LT |
144 | static const int WORKAROUND_82586=1; |
145 | ||
146 | /* Pointers to buffers and their on-card records */ | |
6aa20a22 | 147 | struct mc32_ring_desc |
1da177e4 | 148 | { |
6aa20a22 JG |
149 | volatile struct skb_header *p; |
150 | struct sk_buff *skb; | |
1da177e4 LT |
151 | }; |
152 | ||
153 | /* Information that needs to be kept for each board. */ | |
6aa20a22 | 154 | struct mc32_local |
1da177e4 LT |
155 | { |
156 | int slot; | |
157 | ||
158 | u32 base; | |
1da177e4 LT |
159 | volatile struct mc32_mailbox *rx_box; |
160 | volatile struct mc32_mailbox *tx_box; | |
161 | volatile struct mc32_mailbox *exec_box; | |
162 | volatile struct mc32_stats *stats; /* Start of on-card statistics */ | |
163 | u16 tx_chain; /* Transmit list start offset */ | |
164 | u16 rx_chain; /* Receive list start offset */ | |
6aa20a22 | 165 | u16 tx_len; /* Transmit list count */ |
1da177e4 LT |
166 | u16 rx_len; /* Receive list count */ |
167 | ||
168 | u16 xceiver_desired_state; /* HALTED or RUNNING */ | |
169 | u16 cmd_nonblocking; /* Thread is uninterested in command result */ | |
170 | u16 mc_reload_wait; /* A multicast load request is pending */ | |
171 | u32 mc_list_valid; /* True when the mclist is set */ | |
172 | ||
173 | struct mc32_ring_desc tx_ring[TX_RING_LEN]; /* Host Transmit ring */ | |
174 | struct mc32_ring_desc rx_ring[RX_RING_LEN]; /* Host Receive ring */ | |
175 | ||
176 | atomic_t tx_count; /* buffers left */ | |
177 | atomic_t tx_ring_head; /* index to tx en-queue end */ | |
178 | u16 tx_ring_tail; /* index to tx de-queue end */ | |
179 | ||
6aa20a22 | 180 | u16 rx_ring_tail; /* index to rx de-queue end */ |
1da177e4 LT |
181 | |
182 | struct semaphore cmd_mutex; /* Serialises issuing of execute commands */ | |
183 | struct completion execution_cmd; /* Card has completed an execute command */ | |
184 | struct completion xceiver_cmd; /* Card has completed a tx or rx command */ | |
185 | }; | |
186 | ||
187 | /* The station (ethernet) address prefix, used for a sanity check. */ | |
188 | #define SA_ADDR0 0x02 | |
189 | #define SA_ADDR1 0x60 | |
190 | #define SA_ADDR2 0xAC | |
191 | ||
192 | struct mca_adapters_t { | |
193 | unsigned int id; | |
194 | char *name; | |
195 | }; | |
196 | ||
197 | static const struct mca_adapters_t mc32_adapters[] = { | |
198 | { 0x0041, "3COM EtherLink MC/32" }, | |
199 | { 0x8EF5, "IBM High Performance Lan Adapter" }, | |
200 | { 0x0000, NULL } | |
201 | }; | |
202 | ||
203 | ||
6aa20a22 | 204 | /* Macros for ring index manipulations */ |
1da177e4 LT |
205 | static inline u16 next_rx(u16 rx) { return (rx+1)&(RX_RING_LEN-1); }; |
206 | static inline u16 prev_rx(u16 rx) { return (rx-1)&(RX_RING_LEN-1); }; | |
207 | ||
208 | static inline u16 next_tx(u16 tx) { return (tx+1)&(TX_RING_LEN-1); }; | |
209 | ||
210 | ||
211 | /* Index to functions, as function prototypes. */ | |
212 | static int mc32_probe1(struct net_device *dev, int ioaddr); | |
213 | static int mc32_command(struct net_device *dev, u16 cmd, void *data, int len); | |
214 | static int mc32_open(struct net_device *dev); | |
215 | static void mc32_timeout(struct net_device *dev); | |
216 | static int mc32_send_packet(struct sk_buff *skb, struct net_device *dev); | |
7d12e780 | 217 | static irqreturn_t mc32_interrupt(int irq, void *dev_id); |
1da177e4 LT |
218 | static int mc32_close(struct net_device *dev); |
219 | static struct net_device_stats *mc32_get_stats(struct net_device *dev); | |
220 | static void mc32_set_multicast_list(struct net_device *dev); | |
221 | static void mc32_reset_multicast_list(struct net_device *dev); | |
7282d491 | 222 | static const struct ethtool_ops netdev_ethtool_ops; |
1da177e4 LT |
223 | |
224 | static void cleanup_card(struct net_device *dev) | |
225 | { | |
226 | struct mc32_local *lp = netdev_priv(dev); | |
227 | unsigned slot = lp->slot; | |
228 | mca_mark_as_unused(slot); | |
229 | mca_set_adapter_name(slot, NULL); | |
230 | free_irq(dev->irq, dev); | |
231 | release_region(dev->base_addr, MC32_IO_EXTENT); | |
232 | } | |
233 | ||
234 | /** | |
235 | * mc32_probe - Search for supported boards | |
236 | * @unit: interface number to use | |
237 | * | |
238 | * Because MCA bus is a real bus and we can scan for cards we could do a | |
239 | * single scan for all boards here. Right now we use the passed in device | |
240 | * structure and scan for only one board. This needs fixing for modules | |
241 | * in particular. | |
242 | */ | |
243 | ||
244 | struct net_device *__init mc32_probe(int unit) | |
245 | { | |
246 | struct net_device *dev = alloc_etherdev(sizeof(struct mc32_local)); | |
247 | static int current_mca_slot = -1; | |
248 | int i; | |
249 | int err; | |
250 | ||
251 | if (!dev) | |
252 | return ERR_PTR(-ENOMEM); | |
253 | ||
254 | if (unit >= 0) | |
255 | sprintf(dev->name, "eth%d", unit); | |
256 | ||
6aa20a22 | 257 | /* Do not check any supplied i/o locations. |
1da177e4 LT |
258 | POS registers usually don't fail :) */ |
259 | ||
6aa20a22 JG |
260 | /* MCA cards have POS registers. |
261 | Autodetecting MCA cards is extremely simple. | |
1da177e4 LT |
262 | Just search for the card. */ |
263 | ||
264 | for(i = 0; (mc32_adapters[i].name != NULL); i++) { | |
6aa20a22 | 265 | current_mca_slot = |
1da177e4 LT |
266 | mca_find_unused_adapter(mc32_adapters[i].id, 0); |
267 | ||
268 | if(current_mca_slot != MCA_NOTFOUND) { | |
269 | if(!mc32_probe1(dev, current_mca_slot)) | |
270 | { | |
6aa20a22 | 271 | mca_set_adapter_name(current_mca_slot, |
1da177e4 LT |
272 | mc32_adapters[i].name); |
273 | mca_mark_as_used(current_mca_slot); | |
274 | err = register_netdev(dev); | |
275 | if (err) { | |
276 | cleanup_card(dev); | |
277 | free_netdev(dev); | |
278 | dev = ERR_PTR(err); | |
279 | } | |
280 | return dev; | |
281 | } | |
6aa20a22 | 282 | |
1da177e4 LT |
283 | } |
284 | } | |
285 | free_netdev(dev); | |
286 | return ERR_PTR(-ENODEV); | |
287 | } | |
288 | ||
4394e653 SH |
289 | static const struct net_device_ops netdev_ops = { |
290 | .ndo_open = mc32_open, | |
291 | .ndo_stop = mc32_close, | |
292 | .ndo_start_xmit = mc32_send_packet, | |
293 | .ndo_get_stats = mc32_get_stats, | |
294 | .ndo_set_multicast_list = mc32_set_multicast_list, | |
295 | .ndo_tx_timeout = mc32_timeout, | |
296 | .ndo_change_mtu = eth_change_mtu, | |
297 | .ndo_set_mac_address = eth_mac_addr, | |
298 | .ndo_validate_addr = eth_validate_addr, | |
299 | }; | |
300 | ||
1da177e4 LT |
301 | /** |
302 | * mc32_probe1 - Check a given slot for a board and test the card | |
303 | * @dev: Device structure to fill in | |
304 | * @slot: The MCA bus slot being used by this card | |
305 | * | |
306 | * Decode the slot data and configure the card structures. Having done this we | |
307 | * can reset the card and configure it. The card does a full self test cycle | |
6aa20a22 | 308 | * in firmware so we have to wait for it to return and post us either a |
1da177e4 LT |
309 | * failure case or some addresses we use to find the board internals. |
310 | */ | |
311 | ||
312 | static int __init mc32_probe1(struct net_device *dev, int slot) | |
313 | { | |
314 | static unsigned version_printed; | |
315 | int i, err; | |
316 | u8 POS; | |
317 | u32 base; | |
318 | struct mc32_local *lp = netdev_priv(dev); | |
319 | static u16 mca_io_bases[]={ | |
320 | 0x7280,0x7290, | |
321 | 0x7680,0x7690, | |
322 | 0x7A80,0x7A90, | |
323 | 0x7E80,0x7E90 | |
324 | }; | |
325 | static u32 mca_mem_bases[]={ | |
326 | 0x00C0000, | |
327 | 0x00C4000, | |
328 | 0x00C8000, | |
329 | 0x00CC000, | |
330 | 0x00D0000, | |
331 | 0x00D4000, | |
332 | 0x00D8000, | |
333 | 0x00DC000 | |
334 | }; | |
335 | static char *failures[]={ | |
336 | "Processor instruction", | |
337 | "Processor data bus", | |
338 | "Processor data bus", | |
339 | "Processor data bus", | |
340 | "Adapter bus", | |
341 | "ROM checksum", | |
342 | "Base RAM", | |
343 | "Extended RAM", | |
344 | "82586 internal loopback", | |
345 | "82586 initialisation failure", | |
346 | "Adapter list configuration error" | |
347 | }; | |
348 | ||
349 | /* Time to play MCA games */ | |
350 | ||
351 | if (mc32_debug && version_printed++ == 0) | |
39738e16 | 352 | pr_debug("%s", version); |
1da177e4 | 353 | |
39738e16 | 354 | pr_info("%s: %s found in slot %d: ", dev->name, cardname, slot); |
1da177e4 LT |
355 | |
356 | POS = mca_read_stored_pos(slot, 2); | |
6aa20a22 | 357 | |
1da177e4 LT |
358 | if(!(POS&1)) |
359 | { | |
39738e16 | 360 | pr_cont("disabled.\n"); |
1da177e4 LT |
361 | return -ENODEV; |
362 | } | |
363 | ||
364 | /* Fill in the 'dev' fields. */ | |
365 | dev->base_addr = mca_io_bases[(POS>>1)&7]; | |
366 | dev->mem_start = mca_mem_bases[(POS>>4)&7]; | |
6aa20a22 | 367 | |
1da177e4 LT |
368 | POS = mca_read_stored_pos(slot, 4); |
369 | if(!(POS&1)) | |
370 | { | |
39738e16 | 371 | pr_cont("memory window disabled.\n"); |
1da177e4 LT |
372 | return -ENODEV; |
373 | } | |
374 | ||
375 | POS = mca_read_stored_pos(slot, 5); | |
6aa20a22 | 376 | |
1da177e4 LT |
377 | i=(POS>>4)&3; |
378 | if(i==3) | |
379 | { | |
39738e16 | 380 | pr_cont("invalid memory window.\n"); |
1da177e4 LT |
381 | return -ENODEV; |
382 | } | |
6aa20a22 | 383 | |
1da177e4 LT |
384 | i*=16384; |
385 | i+=16384; | |
6aa20a22 | 386 | |
1da177e4 | 387 | dev->mem_end=dev->mem_start + i; |
6aa20a22 | 388 | |
1da177e4 | 389 | dev->irq = ((POS>>2)&3)+9; |
6aa20a22 | 390 | |
1da177e4 LT |
391 | if(!request_region(dev->base_addr, MC32_IO_EXTENT, cardname)) |
392 | { | |
39738e16 | 393 | pr_cont("io 0x%3lX, which is busy.\n", dev->base_addr); |
1da177e4 LT |
394 | return -EBUSY; |
395 | } | |
396 | ||
39738e16 | 397 | pr_cont("io 0x%3lX irq %d mem 0x%lX (%dK)\n", |
1da177e4 | 398 | dev->base_addr, dev->irq, dev->mem_start, i/1024); |
6aa20a22 JG |
399 | |
400 | ||
1da177e4 | 401 | /* We ought to set the cache line size here.. */ |
6aa20a22 JG |
402 | |
403 | ||
1da177e4 LT |
404 | /* |
405 | * Go PROM browsing | |
406 | */ | |
6aa20a22 | 407 | |
1da177e4 LT |
408 | /* Retrieve and print the ethernet address. */ |
409 | for (i = 0; i < 6; i++) | |
410 | { | |
411 | mca_write_pos(slot, 6, i+12); | |
412 | mca_write_pos(slot, 7, 0); | |
6aa20a22 | 413 | |
0795af57 | 414 | dev->dev_addr[i] = mca_read_pos(slot,3); |
1da177e4 LT |
415 | } |
416 | ||
39738e16 | 417 | pr_info("%s: Address %pM ", dev->name, dev->dev_addr); |
0795af57 | 418 | |
1da177e4 LT |
419 | mca_write_pos(slot, 6, 0); |
420 | mca_write_pos(slot, 7, 0); | |
421 | ||
422 | POS = mca_read_stored_pos(slot, 4); | |
6aa20a22 | 423 | |
1da177e4 | 424 | if(POS&2) |
39738e16 | 425 | pr_cont(": BNC port selected.\n"); |
6aa20a22 | 426 | else |
39738e16 | 427 | pr_cont(": AUI port selected.\n"); |
6aa20a22 | 428 | |
1da177e4 LT |
429 | POS=inb(dev->base_addr+HOST_CTRL); |
430 | POS|=HOST_CTRL_ATTN|HOST_CTRL_RESET; | |
431 | POS&=~HOST_CTRL_INTE; | |
432 | outb(POS, dev->base_addr+HOST_CTRL); | |
433 | /* Reset adapter */ | |
434 | udelay(100); | |
435 | /* Reset off */ | |
436 | POS&=~(HOST_CTRL_ATTN|HOST_CTRL_RESET); | |
437 | outb(POS, dev->base_addr+HOST_CTRL); | |
6aa20a22 | 438 | |
1da177e4 | 439 | udelay(300); |
6aa20a22 | 440 | |
1da177e4 LT |
441 | /* |
442 | * Grab the IRQ | |
443 | */ | |
444 | ||
1fb9df5d | 445 | err = request_irq(dev->irq, &mc32_interrupt, IRQF_SHARED | IRQF_SAMPLE_RANDOM, DRV_NAME, dev); |
1da177e4 LT |
446 | if (err) { |
447 | release_region(dev->base_addr, MC32_IO_EXTENT); | |
39738e16 | 448 | pr_err("%s: unable to get IRQ %d.\n", DRV_NAME, dev->irq); |
1da177e4 LT |
449 | goto err_exit_ports; |
450 | } | |
451 | ||
452 | memset(lp, 0, sizeof(struct mc32_local)); | |
453 | lp->slot = slot; | |
454 | ||
455 | i=0; | |
456 | ||
457 | base = inb(dev->base_addr); | |
6aa20a22 | 458 | |
1da177e4 LT |
459 | while(base == 0xFF) |
460 | { | |
461 | i++; | |
462 | if(i == 1000) | |
463 | { | |
39738e16 | 464 | pr_err("%s: failed to boot adapter.\n", dev->name); |
6aa20a22 | 465 | err = -ENODEV; |
1da177e4 LT |
466 | goto err_exit_irq; |
467 | } | |
468 | udelay(1000); | |
469 | if(inb(dev->base_addr+2)&(1<<5)) | |
470 | base = inb(dev->base_addr); | |
471 | } | |
472 | ||
473 | if(base>0) | |
474 | { | |
475 | if(base < 0x0C) | |
39738e16 | 476 | pr_err("%s: %s%s.\n", dev->name, failures[base-1], |
1da177e4 LT |
477 | base<0x0A?" test failure":""); |
478 | else | |
39738e16 | 479 | pr_err("%s: unknown failure %d.\n", dev->name, base); |
6aa20a22 | 480 | err = -ENODEV; |
1da177e4 LT |
481 | goto err_exit_irq; |
482 | } | |
6aa20a22 | 483 | |
1da177e4 LT |
484 | base=0; |
485 | for(i=0;i<4;i++) | |
486 | { | |
487 | int n=0; | |
6aa20a22 | 488 | |
1da177e4 LT |
489 | while(!(inb(dev->base_addr+2)&(1<<5))) |
490 | { | |
491 | n++; | |
492 | udelay(50); | |
493 | if(n>100) | |
494 | { | |
39738e16 | 495 | pr_err("%s: mailbox read fail (%d).\n", dev->name, i); |
1da177e4 LT |
496 | err = -ENODEV; |
497 | goto err_exit_irq; | |
498 | } | |
499 | } | |
500 | ||
501 | base|=(inb(dev->base_addr)<<(8*i)); | |
502 | } | |
6aa20a22 | 503 | |
1da177e4 | 504 | lp->exec_box=isa_bus_to_virt(dev->mem_start+base); |
6aa20a22 JG |
505 | |
506 | base=lp->exec_box->data[1]<<16|lp->exec_box->data[0]; | |
507 | ||
1da177e4 | 508 | lp->base = dev->mem_start+base; |
6aa20a22 JG |
509 | |
510 | lp->rx_box=isa_bus_to_virt(lp->base + lp->exec_box->data[2]); | |
1da177e4 | 511 | lp->tx_box=isa_bus_to_virt(lp->base + lp->exec_box->data[3]); |
6aa20a22 | 512 | |
1da177e4 LT |
513 | lp->stats = isa_bus_to_virt(lp->base + lp->exec_box->data[5]); |
514 | ||
515 | /* | |
516 | * Descriptor chains (card relative) | |
517 | */ | |
6aa20a22 | 518 | |
1da177e4 LT |
519 | lp->tx_chain = lp->exec_box->data[8]; /* Transmit list start offset */ |
520 | lp->rx_chain = lp->exec_box->data[10]; /* Receive list start offset */ | |
6aa20a22 | 521 | lp->tx_len = lp->exec_box->data[9]; /* Transmit list count */ |
1da177e4 LT |
522 | lp->rx_len = lp->exec_box->data[11]; /* Receive list count */ |
523 | ||
524 | init_MUTEX_LOCKED(&lp->cmd_mutex); | |
525 | init_completion(&lp->execution_cmd); | |
526 | init_completion(&lp->xceiver_cmd); | |
6aa20a22 | 527 | |
39738e16 | 528 | pr_info("%s: Firmware Rev %d. %d RX buffers, %d TX buffers. Base of 0x%08X.\n", |
1da177e4 LT |
529 | dev->name, lp->exec_box->data[12], lp->rx_len, lp->tx_len, lp->base); |
530 | ||
4394e653 | 531 | dev->netdev_ops = &netdev_ops; |
1da177e4 LT |
532 | dev->watchdog_timeo = HZ*5; /* Board does all the work */ |
533 | dev->ethtool_ops = &netdev_ethtool_ops; | |
534 | ||
535 | return 0; | |
536 | ||
537 | err_exit_irq: | |
538 | free_irq(dev->irq, dev); | |
539 | err_exit_ports: | |
540 | release_region(dev->base_addr, MC32_IO_EXTENT); | |
541 | return err; | |
542 | } | |
543 | ||
544 | ||
545 | /** | |
546 | * mc32_ready_poll - wait until we can feed it a command | |
547 | * @dev: The device to wait for | |
6aa20a22 | 548 | * |
1da177e4 LT |
549 | * Wait until the card becomes ready to accept a command via the |
550 | * command register. This tells us nothing about the completion | |
551 | * status of any pending commands and takes very little time at all. | |
552 | */ | |
6aa20a22 | 553 | |
1da177e4 LT |
554 | static inline void mc32_ready_poll(struct net_device *dev) |
555 | { | |
556 | int ioaddr = dev->base_addr; | |
557 | while(!(inb(ioaddr+HOST_STATUS)&HOST_STATUS_CRR)); | |
558 | } | |
559 | ||
560 | ||
561 | /** | |
562 | * mc32_command_nowait - send a command non blocking | |
563 | * @dev: The 3c527 to issue the command to | |
564 | * @cmd: The command word to write to the mailbox | |
565 | * @data: A data block if the command expects one | |
566 | * @len: Length of the data block | |
567 | * | |
568 | * Send a command from interrupt state. If there is a command | |
569 | * currently being executed then we return an error of -1. It | |
570 | * simply isn't viable to wait around as commands may be | |
571 | * slow. This can theoretically be starved on SMP, but it's hard | |
572 | * to see a realistic situation. We do not wait for the command | |
573 | * to complete --- we rely on the interrupt handler to tidy up | |
574 | * after us. | |
575 | */ | |
576 | ||
577 | static int mc32_command_nowait(struct net_device *dev, u16 cmd, void *data, int len) | |
578 | { | |
579 | struct mc32_local *lp = netdev_priv(dev); | |
580 | int ioaddr = dev->base_addr; | |
581 | int ret = -1; | |
582 | ||
583 | if (down_trylock(&lp->cmd_mutex) == 0) | |
584 | { | |
585 | lp->cmd_nonblocking=1; | |
586 | lp->exec_box->mbox=0; | |
587 | lp->exec_box->mbox=cmd; | |
588 | memcpy((void *)lp->exec_box->data, data, len); | |
589 | barrier(); /* the memcpy forgot the volatile so be sure */ | |
590 | ||
591 | /* Send the command */ | |
592 | mc32_ready_poll(dev); | |
593 | outb(1<<6, ioaddr+HOST_CMD); | |
594 | ||
595 | ret = 0; | |
596 | ||
597 | /* Interrupt handler will signal mutex on completion */ | |
598 | } | |
599 | ||
600 | return ret; | |
601 | } | |
602 | ||
603 | ||
604 | /** | |
605 | * mc32_command - send a command and sleep until completion | |
606 | * @dev: The 3c527 card to issue the command to | |
607 | * @cmd: The command word to write to the mailbox | |
608 | * @data: A data block if the command expects one | |
609 | * @len: Length of the data block | |
610 | * | |
611 | * Sends exec commands in a user context. This permits us to wait around | |
612 | * for the replies and also to wait for the command buffer to complete | |
6aa20a22 | 613 | * from a previous command before we execute our command. After our |
1da177e4 LT |
614 | * command completes we will attempt any pending multicast reload |
615 | * we blocked off by hogging the exec buffer. | |
616 | * | |
6aa20a22 | 617 | * You feed the card a command, you wait, it interrupts you get a |
1da177e4 LT |
618 | * reply. All well and good. The complication arises because you use |
619 | * commands for filter list changes which come in at bh level from things | |
620 | * like IPV6 group stuff. | |
621 | */ | |
6aa20a22 | 622 | |
1da177e4 LT |
623 | static int mc32_command(struct net_device *dev, u16 cmd, void *data, int len) |
624 | { | |
625 | struct mc32_local *lp = netdev_priv(dev); | |
626 | int ioaddr = dev->base_addr; | |
627 | int ret = 0; | |
6aa20a22 | 628 | |
1da177e4 LT |
629 | down(&lp->cmd_mutex); |
630 | ||
631 | /* | |
632 | * My Turn | |
633 | */ | |
634 | ||
635 | lp->cmd_nonblocking=0; | |
636 | lp->exec_box->mbox=0; | |
637 | lp->exec_box->mbox=cmd; | |
638 | memcpy((void *)lp->exec_box->data, data, len); | |
639 | barrier(); /* the memcpy forgot the volatile so be sure */ | |
640 | ||
641 | mc32_ready_poll(dev); | |
642 | outb(1<<6, ioaddr+HOST_CMD); | |
643 | ||
644 | wait_for_completion(&lp->execution_cmd); | |
6aa20a22 | 645 | |
1da177e4 LT |
646 | if(lp->exec_box->mbox&(1<<13)) |
647 | ret = -1; | |
648 | ||
649 | up(&lp->cmd_mutex); | |
650 | ||
651 | /* | |
652 | * A multicast set got blocked - try it now | |
653 | */ | |
654 | ||
655 | if(lp->mc_reload_wait) | |
656 | { | |
657 | mc32_reset_multicast_list(dev); | |
658 | } | |
659 | ||
660 | return ret; | |
661 | } | |
662 | ||
663 | ||
664 | /** | |
665 | * mc32_start_transceiver - tell board to restart tx/rx | |
666 | * @dev: The 3c527 card to issue the command to | |
667 | * | |
668 | * This may be called from the interrupt state, where it is used | |
6aa20a22 JG |
669 | * to restart the rx ring if the card runs out of rx buffers. |
670 | * | |
1da177e4 LT |
671 | * We must first check if it's ok to (re)start the transceiver. See |
672 | * mc32_close for details. | |
673 | */ | |
674 | ||
675 | static void mc32_start_transceiver(struct net_device *dev) { | |
676 | ||
677 | struct mc32_local *lp = netdev_priv(dev); | |
678 | int ioaddr = dev->base_addr; | |
679 | ||
6aa20a22 | 680 | /* Ignore RX overflow on device closure */ |
1da177e4 | 681 | if (lp->xceiver_desired_state==HALTED) |
6aa20a22 | 682 | return; |
1da177e4 LT |
683 | |
684 | /* Give the card the offset to the post-EOL-bit RX descriptor */ | |
6aa20a22 | 685 | mc32_ready_poll(dev); |
1da177e4 | 686 | lp->rx_box->mbox=0; |
6aa20a22 JG |
687 | lp->rx_box->data[0]=lp->rx_ring[prev_rx(lp->rx_ring_tail)].p->next; |
688 | outb(HOST_CMD_START_RX, ioaddr+HOST_CMD); | |
1da177e4 | 689 | |
6aa20a22 | 690 | mc32_ready_poll(dev); |
1da177e4 | 691 | lp->tx_box->mbox=0; |
6aa20a22 JG |
692 | outb(HOST_CMD_RESTRT_TX, ioaddr+HOST_CMD); /* card ignores this on RX restart */ |
693 | ||
694 | /* We are not interrupted on start completion */ | |
1da177e4 LT |
695 | } |
696 | ||
697 | ||
698 | /** | |
699 | * mc32_halt_transceiver - tell board to stop tx/rx | |
700 | * @dev: The 3c527 card to issue the command to | |
701 | * | |
702 | * We issue the commands to halt the card's transceiver. In fact, | |
703 | * after some experimenting we now simply tell the card to | |
704 | * suspend. When issuing aborts occasionally odd things happened. | |
705 | * | |
706 | * We then sleep until the card has notified us that both rx and | |
707 | * tx have been suspended. | |
6aa20a22 | 708 | */ |
1da177e4 | 709 | |
6aa20a22 | 710 | static void mc32_halt_transceiver(struct net_device *dev) |
1da177e4 LT |
711 | { |
712 | struct mc32_local *lp = netdev_priv(dev); | |
713 | int ioaddr = dev->base_addr; | |
714 | ||
6aa20a22 | 715 | mc32_ready_poll(dev); |
1da177e4 | 716 | lp->rx_box->mbox=0; |
6aa20a22 | 717 | outb(HOST_CMD_SUSPND_RX, ioaddr+HOST_CMD); |
1da177e4 LT |
718 | wait_for_completion(&lp->xceiver_cmd); |
719 | ||
6aa20a22 | 720 | mc32_ready_poll(dev); |
1da177e4 | 721 | lp->tx_box->mbox=0; |
6aa20a22 | 722 | outb(HOST_CMD_SUSPND_TX, ioaddr+HOST_CMD); |
1da177e4 LT |
723 | wait_for_completion(&lp->xceiver_cmd); |
724 | } | |
725 | ||
726 | ||
727 | /** | |
728 | * mc32_load_rx_ring - load the ring of receive buffers | |
729 | * @dev: 3c527 to build the ring for | |
730 | * | |
731 | * This initalises the on-card and driver datastructures to | |
732 | * the point where mc32_start_transceiver() can be called. | |
733 | * | |
734 | * The card sets up the receive ring for us. We are required to use the | |
735 | * ring it provides, although the size of the ring is configurable. | |
736 | * | |
737 | * We allocate an sk_buff for each ring entry in turn and | |
738 | * initalise its house-keeping info. At the same time, we read | |
739 | * each 'next' pointer in our rx_ring array. This reduces slow | |
740 | * shared-memory reads and makes it easy to access predecessor | |
741 | * descriptors. | |
742 | * | |
743 | * We then set the end-of-list bit for the last entry so that the | |
744 | * card will know when it has run out of buffers. | |
745 | */ | |
6aa20a22 | 746 | |
1da177e4 LT |
747 | static int mc32_load_rx_ring(struct net_device *dev) |
748 | { | |
749 | struct mc32_local *lp = netdev_priv(dev); | |
750 | int i; | |
751 | u16 rx_base; | |
752 | volatile struct skb_header *p; | |
6aa20a22 | 753 | |
1da177e4 LT |
754 | rx_base=lp->rx_chain; |
755 | ||
756 | for(i=0; i<RX_RING_LEN; i++) { | |
757 | lp->rx_ring[i].skb=alloc_skb(1532, GFP_KERNEL); | |
758 | if (lp->rx_ring[i].skb==NULL) { | |
759 | for (;i>=0;i--) | |
760 | kfree_skb(lp->rx_ring[i].skb); | |
761 | return -ENOBUFS; | |
762 | } | |
763 | skb_reserve(lp->rx_ring[i].skb, 18); | |
764 | ||
765 | p=isa_bus_to_virt(lp->base+rx_base); | |
6aa20a22 | 766 | |
1da177e4 LT |
767 | p->control=0; |
768 | p->data=isa_virt_to_bus(lp->rx_ring[i].skb->data); | |
769 | p->status=0; | |
770 | p->length=1532; | |
6aa20a22 JG |
771 | |
772 | lp->rx_ring[i].p=p; | |
773 | rx_base=p->next; | |
1da177e4 LT |
774 | } |
775 | ||
776 | lp->rx_ring[i-1].p->control |= CONTROL_EOL; | |
777 | ||
778 | lp->rx_ring_tail=0; | |
779 | ||
780 | return 0; | |
6aa20a22 | 781 | } |
1da177e4 LT |
782 | |
783 | ||
784 | /** | |
785 | * mc32_flush_rx_ring - free the ring of receive buffers | |
786 | * @lp: Local data of 3c527 to flush the rx ring of | |
787 | * | |
6aa20a22 | 788 | * Free the buffer for each ring slot. This may be called |
1da177e4 LT |
789 | * before mc32_load_rx_ring(), eg. on error in mc32_open(). |
790 | * Requires rx skb pointers to point to a valid skb, or NULL. | |
791 | */ | |
792 | ||
793 | static void mc32_flush_rx_ring(struct net_device *dev) | |
794 | { | |
795 | struct mc32_local *lp = netdev_priv(dev); | |
6aa20a22 | 796 | int i; |
1da177e4 | 797 | |
6aa20a22 JG |
798 | for(i=0; i < RX_RING_LEN; i++) |
799 | { | |
1da177e4 LT |
800 | if (lp->rx_ring[i].skb) { |
801 | dev_kfree_skb(lp->rx_ring[i].skb); | |
802 | lp->rx_ring[i].skb = NULL; | |
803 | } | |
6aa20a22 JG |
804 | lp->rx_ring[i].p=NULL; |
805 | } | |
1da177e4 LT |
806 | } |
807 | ||
808 | ||
809 | /** | |
810 | * mc32_load_tx_ring - load transmit ring | |
811 | * @dev: The 3c527 card to issue the command to | |
812 | * | |
6aa20a22 | 813 | * This sets up the host transmit data-structures. |
1da177e4 LT |
814 | * |
815 | * First, we obtain from the card it's current postion in the tx | |
816 | * ring, so that we will know where to begin transmitting | |
817 | * packets. | |
6aa20a22 | 818 | * |
1da177e4 LT |
819 | * Then, we read the 'next' pointers from the on-card tx ring into |
820 | * our tx_ring array to reduce slow shared-mem reads. Finally, we | |
821 | * intitalise the tx house keeping variables. | |
6aa20a22 JG |
822 | * |
823 | */ | |
1da177e4 LT |
824 | |
825 | static void mc32_load_tx_ring(struct net_device *dev) | |
6aa20a22 | 826 | { |
1da177e4 LT |
827 | struct mc32_local *lp = netdev_priv(dev); |
828 | volatile struct skb_header *p; | |
6aa20a22 | 829 | int i; |
1da177e4 LT |
830 | u16 tx_base; |
831 | ||
6aa20a22 | 832 | tx_base=lp->tx_box->data[0]; |
1da177e4 LT |
833 | |
834 | for(i=0 ; i<TX_RING_LEN ; i++) | |
835 | { | |
836 | p=isa_bus_to_virt(lp->base+tx_base); | |
6aa20a22 | 837 | lp->tx_ring[i].p=p; |
1da177e4 LT |
838 | lp->tx_ring[i].skb=NULL; |
839 | ||
840 | tx_base=p->next; | |
841 | } | |
842 | ||
843 | /* -1 so that tx_ring_head cannot "lap" tx_ring_tail */ | |
844 | /* see mc32_tx_ring */ | |
845 | ||
6aa20a22 JG |
846 | atomic_set(&lp->tx_count, TX_RING_LEN-1); |
847 | atomic_set(&lp->tx_ring_head, 0); | |
848 | lp->tx_ring_tail=0; | |
849 | } | |
1da177e4 LT |
850 | |
851 | ||
852 | /** | |
853 | * mc32_flush_tx_ring - free transmit ring | |
854 | * @lp: Local data of 3c527 to flush the tx ring of | |
855 | * | |
856 | * If the ring is non-empty, zip over the it, freeing any | |
857 | * allocated skb_buffs. The tx ring house-keeping variables are | |
858 | * then reset. Requires rx skb pointers to point to a valid skb, | |
859 | * or NULL. | |
860 | */ | |
861 | ||
862 | static void mc32_flush_tx_ring(struct net_device *dev) | |
863 | { | |
864 | struct mc32_local *lp = netdev_priv(dev); | |
865 | int i; | |
866 | ||
867 | for (i=0; i < TX_RING_LEN; i++) | |
868 | { | |
869 | if (lp->tx_ring[i].skb) | |
870 | { | |
871 | dev_kfree_skb(lp->tx_ring[i].skb); | |
872 | lp->tx_ring[i].skb = NULL; | |
873 | } | |
874 | } | |
875 | ||
6aa20a22 JG |
876 | atomic_set(&lp->tx_count, 0); |
877 | atomic_set(&lp->tx_ring_head, 0); | |
1da177e4 LT |
878 | lp->tx_ring_tail=0; |
879 | } | |
6aa20a22 | 880 | |
1da177e4 LT |
881 | |
882 | /** | |
883 | * mc32_open - handle 'up' of card | |
884 | * @dev: device to open | |
885 | * | |
886 | * The user is trying to bring the card into ready state. This requires | |
887 | * a brief dialogue with the card. Firstly we enable interrupts and then | |
888 | * 'indications'. Without these enabled the card doesn't bother telling | |
889 | * us what it has done. This had me puzzled for a week. | |
890 | * | |
891 | * We configure the number of card descriptors, then load the network | |
892 | * address and multicast filters. Turn on the workaround mode. This | |
893 | * works around a bug in the 82586 - it asks the firmware to do | |
894 | * so. It has a performance (latency) hit but is needed on busy | |
895 | * [read most] lans. We load the ring with buffers then we kick it | |
896 | * all off. | |
897 | */ | |
898 | ||
899 | static int mc32_open(struct net_device *dev) | |
900 | { | |
901 | int ioaddr = dev->base_addr; | |
902 | struct mc32_local *lp = netdev_priv(dev); | |
903 | u8 one=1; | |
904 | u8 regs; | |
905 | u16 descnumbuffs[2] = {TX_RING_LEN, RX_RING_LEN}; | |
906 | ||
907 | /* | |
908 | * Interrupts enabled | |
909 | */ | |
910 | ||
911 | regs=inb(ioaddr+HOST_CTRL); | |
912 | regs|=HOST_CTRL_INTE; | |
913 | outb(regs, ioaddr+HOST_CTRL); | |
6aa20a22 | 914 | |
1da177e4 LT |
915 | /* |
916 | * Allow ourselves to issue commands | |
917 | */ | |
918 | ||
919 | up(&lp->cmd_mutex); | |
920 | ||
921 | ||
922 | /* | |
923 | * Send the indications on command | |
924 | */ | |
925 | ||
926 | mc32_command(dev, 4, &one, 2); | |
927 | ||
928 | /* | |
6aa20a22 | 929 | * Poke it to make sure it's really dead. |
1da177e4 LT |
930 | */ |
931 | ||
6aa20a22 JG |
932 | mc32_halt_transceiver(dev); |
933 | mc32_flush_tx_ring(dev); | |
1da177e4 | 934 | |
6aa20a22 JG |
935 | /* |
936 | * Ask card to set up on-card descriptors to our spec | |
937 | */ | |
1da177e4 | 938 | |
6aa20a22 | 939 | if(mc32_command(dev, 8, descnumbuffs, 4)) { |
39738e16 | 940 | pr_info("%s: %s rejected our buffer configuration!\n", |
1da177e4 | 941 | dev->name, cardname); |
6aa20a22 JG |
942 | mc32_close(dev); |
943 | return -ENOBUFS; | |
1da177e4 | 944 | } |
6aa20a22 JG |
945 | |
946 | /* Report new configuration */ | |
947 | mc32_command(dev, 6, NULL, 0); | |
1da177e4 LT |
948 | |
949 | lp->tx_chain = lp->exec_box->data[8]; /* Transmit list start offset */ | |
950 | lp->rx_chain = lp->exec_box->data[10]; /* Receive list start offset */ | |
6aa20a22 | 951 | lp->tx_len = lp->exec_box->data[9]; /* Transmit list count */ |
1da177e4 | 952 | lp->rx_len = lp->exec_box->data[11]; /* Receive list count */ |
6aa20a22 | 953 | |
1da177e4 LT |
954 | /* Set Network Address */ |
955 | mc32_command(dev, 1, dev->dev_addr, 6); | |
6aa20a22 | 956 | |
1da177e4 LT |
957 | /* Set the filters */ |
958 | mc32_set_multicast_list(dev); | |
6aa20a22 JG |
959 | |
960 | if (WORKAROUND_82586) { | |
1da177e4 LT |
961 | u16 zero_word=0; |
962 | mc32_command(dev, 0x0D, &zero_word, 2); /* 82586 bug workaround on */ | |
963 | } | |
964 | ||
965 | mc32_load_tx_ring(dev); | |
6aa20a22 JG |
966 | |
967 | if(mc32_load_rx_ring(dev)) | |
1da177e4 LT |
968 | { |
969 | mc32_close(dev); | |
970 | return -ENOBUFS; | |
971 | } | |
972 | ||
973 | lp->xceiver_desired_state = RUNNING; | |
6aa20a22 | 974 | |
1da177e4 LT |
975 | /* And finally, set the ball rolling... */ |
976 | mc32_start_transceiver(dev); | |
977 | ||
978 | netif_start_queue(dev); | |
979 | ||
980 | return 0; | |
981 | } | |
982 | ||
983 | ||
984 | /** | |
985 | * mc32_timeout - handle a timeout from the network layer | |
986 | * @dev: 3c527 that timed out | |
987 | * | |
988 | * Handle a timeout on transmit from the 3c527. This normally means | |
989 | * bad things as the hardware handles cable timeouts and mess for | |
990 | * us. | |
991 | * | |
992 | */ | |
993 | ||
994 | static void mc32_timeout(struct net_device *dev) | |
995 | { | |
39738e16 | 996 | pr_warning("%s: transmit timed out?\n", dev->name); |
1da177e4 LT |
997 | /* Try to restart the adaptor. */ |
998 | netif_wake_queue(dev); | |
999 | } | |
1000 | ||
1001 | ||
1002 | /** | |
1003 | * mc32_send_packet - queue a frame for transmit | |
1004 | * @skb: buffer to transmit | |
1005 | * @dev: 3c527 to send it out of | |
1006 | * | |
1007 | * Transmit a buffer. This normally means throwing the buffer onto | |
1008 | * the transmit queue as the queue is quite large. If the queue is | |
1009 | * full then we set tx_busy and return. Once the interrupt handler | |
1010 | * gets messages telling it to reclaim transmit queue entries, we will | |
1011 | * clear tx_busy and the kernel will start calling this again. | |
1012 | * | |
1013 | * We do not disable interrupts or acquire any locks; this can | |
1014 | * run concurrently with mc32_tx_ring(), and the function itself | |
1015 | * is serialised at a higher layer. However, similarly for the | |
1016 | * card itself, we must ensure that we update tx_ring_head only | |
1017 | * after we've established a valid packet on the tx ring (and | |
1018 | * before we let the card "see" it, to prevent it racing with the | |
1019 | * irq handler). | |
6aa20a22 | 1020 | * |
1da177e4 LT |
1021 | */ |
1022 | ||
1023 | static int mc32_send_packet(struct sk_buff *skb, struct net_device *dev) | |
1024 | { | |
1025 | struct mc32_local *lp = netdev_priv(dev); | |
1026 | u32 head = atomic_read(&lp->tx_ring_head); | |
6aa20a22 | 1027 | |
1da177e4 LT |
1028 | volatile struct skb_header *p, *np; |
1029 | ||
1030 | netif_stop_queue(dev); | |
1031 | ||
1032 | if(atomic_read(&lp->tx_count)==0) { | |
5b548140 | 1033 | return NETDEV_TX_BUSY; |
1da177e4 LT |
1034 | } |
1035 | ||
5b057c6b | 1036 | if (skb_padto(skb, ETH_ZLEN)) { |
1da177e4 LT |
1037 | netif_wake_queue(dev); |
1038 | return 0; | |
1039 | } | |
1040 | ||
6aa20a22 | 1041 | atomic_dec(&lp->tx_count); |
1da177e4 LT |
1042 | |
1043 | /* P is the last sending/sent buffer as a pointer */ | |
1044 | p=lp->tx_ring[head].p; | |
6aa20a22 | 1045 | |
1da177e4 LT |
1046 | head = next_tx(head); |
1047 | ||
1048 | /* NP is the buffer we will be loading */ | |
6aa20a22 JG |
1049 | np=lp->tx_ring[head].p; |
1050 | ||
1da177e4 LT |
1051 | /* We will need this to flush the buffer out */ |
1052 | lp->tx_ring[head].skb=skb; | |
1053 | ||
6aa20a22 | 1054 | np->length = unlikely(skb->len < ETH_ZLEN) ? ETH_ZLEN : skb->len; |
1da177e4 LT |
1055 | np->data = isa_virt_to_bus(skb->data); |
1056 | np->status = 0; | |
6aa20a22 | 1057 | np->control = CONTROL_EOP | CONTROL_EOL; |
1da177e4 | 1058 | wmb(); |
6aa20a22 | 1059 | |
1da177e4 LT |
1060 | /* |
1061 | * The new frame has been setup; we can now | |
1062 | * let the interrupt handler and card "see" it | |
1063 | */ | |
1064 | ||
6aa20a22 | 1065 | atomic_set(&lp->tx_ring_head, head); |
1da177e4 LT |
1066 | p->control &= ~CONTROL_EOL; |
1067 | ||
1068 | netif_wake_queue(dev); | |
1069 | return 0; | |
1070 | } | |
1071 | ||
1072 | ||
1073 | /** | |
1074 | * mc32_update_stats - pull off the on board statistics | |
1075 | * @dev: 3c527 to service | |
1076 | * | |
6aa20a22 | 1077 | * |
1da177e4 LT |
1078 | * Query and reset the on-card stats. There's the small possibility |
1079 | * of a race here, which would result in an underestimation of | |
1080 | * actual errors. As such, we'd prefer to keep all our stats | |
1081 | * collection in software. As a rule, we do. However it can't be | |
1082 | * used for rx errors and collisions as, by default, the card discards | |
6aa20a22 | 1083 | * bad rx packets. |
1da177e4 LT |
1084 | * |
1085 | * Setting the SAV BP in the rx filter command supposedly | |
1086 | * stops this behaviour. However, testing shows that it only seems to | |
1087 | * enable the collation of on-card rx statistics --- the driver | |
1088 | * never sees an RX descriptor with an error status set. | |
1089 | * | |
1090 | */ | |
1091 | ||
1092 | static void mc32_update_stats(struct net_device *dev) | |
1093 | { | |
1094 | struct mc32_local *lp = netdev_priv(dev); | |
6aa20a22 | 1095 | volatile struct mc32_stats *st = lp->stats; |
1da177e4 | 1096 | |
6aa20a22 JG |
1097 | u32 rx_errors=0; |
1098 | ||
4711c841 | 1099 | rx_errors+=dev->stats.rx_crc_errors +=st->rx_crc_errors; |
1da177e4 | 1100 | st->rx_crc_errors=0; |
4711c841 | 1101 | rx_errors+=dev->stats.rx_fifo_errors +=st->rx_overrun_errors; |
6aa20a22 | 1102 | st->rx_overrun_errors=0; |
4711c841 | 1103 | rx_errors+=dev->stats.rx_frame_errors +=st->rx_alignment_errors; |
1da177e4 | 1104 | st->rx_alignment_errors=0; |
4711c841 | 1105 | rx_errors+=dev->stats.rx_length_errors+=st->rx_tooshort_errors; |
1da177e4 | 1106 | st->rx_tooshort_errors=0; |
4711c841 | 1107 | rx_errors+=dev->stats.rx_missed_errors+=st->rx_outofresource_errors; |
6aa20a22 | 1108 | st->rx_outofresource_errors=0; |
4711c841 | 1109 | dev->stats.rx_errors=rx_errors; |
6aa20a22 | 1110 | |
1da177e4 | 1111 | /* Number of packets which saw one collision */ |
4711c841 | 1112 | dev->stats.collisions+=st->dataC[10]; |
6aa20a22 | 1113 | st->dataC[10]=0; |
1da177e4 | 1114 | |
6aa20a22 | 1115 | /* Number of packets which saw 2--15 collisions */ |
4711c841 | 1116 | dev->stats.collisions+=st->dataC[11]; |
6aa20a22 JG |
1117 | st->dataC[11]=0; |
1118 | } | |
1da177e4 LT |
1119 | |
1120 | ||
1121 | /** | |
1122 | * mc32_rx_ring - process the receive ring | |
1123 | * @dev: 3c527 that needs its receive ring processing | |
1124 | * | |
1125 | * | |
1126 | * We have received one or more indications from the card that a | |
1127 | * receive has completed. The buffer ring thus contains dirty | |
1128 | * entries. We walk the ring by iterating over the circular rx_ring | |
1129 | * array, starting at the next dirty buffer (which happens to be the | |
1130 | * one we finished up at last time around). | |
1131 | * | |
1132 | * For each completed packet, we will either copy it and pass it up | |
1133 | * the stack or, if the packet is near MTU sized, we allocate | |
1134 | * another buffer and flip the old one up the stack. | |
6aa20a22 | 1135 | * |
1da177e4 LT |
1136 | * We must succeed in keeping a buffer on the ring. If necessary we |
1137 | * will toss a received packet rather than lose a ring entry. Once | |
1138 | * the first uncompleted descriptor is found, we move the | |
1139 | * End-Of-List bit to include the buffers just processed. | |
1140 | * | |
1141 | */ | |
1142 | ||
1143 | static void mc32_rx_ring(struct net_device *dev) | |
1144 | { | |
1145 | struct mc32_local *lp = netdev_priv(dev); | |
1146 | volatile struct skb_header *p; | |
1147 | u16 rx_ring_tail; | |
1148 | u16 rx_old_tail; | |
1149 | int x=0; | |
1150 | ||
1151 | rx_old_tail = rx_ring_tail = lp->rx_ring_tail; | |
6aa20a22 | 1152 | |
1da177e4 | 1153 | do |
6aa20a22 JG |
1154 | { |
1155 | p=lp->rx_ring[rx_ring_tail].p; | |
1da177e4 | 1156 | |
6aa20a22 | 1157 | if(!(p->status & (1<<7))) { /* Not COMPLETED */ |
1da177e4 | 1158 | break; |
6aa20a22 | 1159 | } |
1da177e4 | 1160 | if(p->status & (1<<6)) /* COMPLETED_OK */ |
6aa20a22 | 1161 | { |
1da177e4 LT |
1162 | |
1163 | u16 length=p->length; | |
6aa20a22 JG |
1164 | struct sk_buff *skb; |
1165 | struct sk_buff *newskb; | |
1da177e4 LT |
1166 | |
1167 | /* Try to save time by avoiding a copy on big frames */ | |
1168 | ||
6aa20a22 JG |
1169 | if ((length > RX_COPYBREAK) |
1170 | && ((newskb=dev_alloc_skb(1532)) != NULL)) | |
1171 | { | |
1da177e4 LT |
1172 | skb=lp->rx_ring[rx_ring_tail].skb; |
1173 | skb_put(skb, length); | |
6aa20a22 JG |
1174 | |
1175 | skb_reserve(newskb,18); | |
1176 | lp->rx_ring[rx_ring_tail].skb=newskb; | |
1177 | p->data=isa_virt_to_bus(newskb->data); | |
1178 | } | |
1179 | else | |
1da177e4 | 1180 | { |
6aa20a22 | 1181 | skb=dev_alloc_skb(length+2); |
1da177e4 LT |
1182 | |
1183 | if(skb==NULL) { | |
4711c841 | 1184 | dev->stats.rx_dropped++; |
6aa20a22 | 1185 | goto dropped; |
1da177e4 LT |
1186 | } |
1187 | ||
1188 | skb_reserve(skb,2); | |
1189 | memcpy(skb_put(skb, length), | |
1190 | lp->rx_ring[rx_ring_tail].skb->data, length); | |
1191 | } | |
6aa20a22 JG |
1192 | |
1193 | skb->protocol=eth_type_trans(skb,dev); | |
4711c841 PZ |
1194 | dev->stats.rx_packets++; |
1195 | dev->stats.rx_bytes += length; | |
1da177e4 LT |
1196 | netif_rx(skb); |
1197 | } | |
1198 | ||
1199 | dropped: | |
6aa20a22 | 1200 | p->length = 1532; |
1da177e4 | 1201 | p->status = 0; |
6aa20a22 JG |
1202 | |
1203 | rx_ring_tail=next_rx(rx_ring_tail); | |
1da177e4 | 1204 | } |
6aa20a22 | 1205 | while(x++<48); |
1da177e4 | 1206 | |
6aa20a22 JG |
1207 | /* If there was actually a frame to be processed, place the EOL bit */ |
1208 | /* at the descriptor prior to the one to be filled next */ | |
1da177e4 | 1209 | |
6aa20a22 JG |
1210 | if (rx_ring_tail != rx_old_tail) |
1211 | { | |
1212 | lp->rx_ring[prev_rx(rx_ring_tail)].p->control |= CONTROL_EOL; | |
1213 | lp->rx_ring[prev_rx(rx_old_tail)].p->control &= ~CONTROL_EOL; | |
1da177e4 | 1214 | |
6aa20a22 | 1215 | lp->rx_ring_tail=rx_ring_tail; |
1da177e4 LT |
1216 | } |
1217 | } | |
1218 | ||
1219 | ||
1220 | /** | |
1221 | * mc32_tx_ring - process completed transmits | |
1222 | * @dev: 3c527 that needs its transmit ring processing | |
1223 | * | |
1224 | * | |
1225 | * This operates in a similar fashion to mc32_rx_ring. We iterate | |
1226 | * over the transmit ring. For each descriptor which has been | |
1227 | * processed by the card, we free its associated buffer and note | |
1228 | * any errors. This continues until the transmit ring is emptied | |
1229 | * or we reach a descriptor that hasn't yet been processed by the | |
1230 | * card. | |
6aa20a22 | 1231 | * |
1da177e4 LT |
1232 | */ |
1233 | ||
6aa20a22 | 1234 | static void mc32_tx_ring(struct net_device *dev) |
1da177e4 LT |
1235 | { |
1236 | struct mc32_local *lp = netdev_priv(dev); | |
1237 | volatile struct skb_header *np; | |
1238 | ||
1239 | /* | |
1240 | * We rely on head==tail to mean 'queue empty'. | |
1241 | * This is why lp->tx_count=TX_RING_LEN-1: in order to prevent | |
1242 | * tx_ring_head wrapping to tail and confusing a 'queue empty' | |
1243 | * condition with 'queue full' | |
1244 | */ | |
1245 | ||
6aa20a22 JG |
1246 | while (lp->tx_ring_tail != atomic_read(&lp->tx_ring_head)) |
1247 | { | |
1248 | u16 t; | |
1da177e4 | 1249 | |
6aa20a22 JG |
1250 | t=next_tx(lp->tx_ring_tail); |
1251 | np=lp->tx_ring[t].p; | |
1da177e4 | 1252 | |
6aa20a22 | 1253 | if(!(np->status & (1<<7))) |
1da177e4 | 1254 | { |
6aa20a22 JG |
1255 | /* Not COMPLETED */ |
1256 | break; | |
1257 | } | |
4711c841 | 1258 | dev->stats.tx_packets++; |
1da177e4 LT |
1259 | if(!(np->status & (1<<6))) /* Not COMPLETED_OK */ |
1260 | { | |
4711c841 | 1261 | dev->stats.tx_errors++; |
1da177e4 LT |
1262 | |
1263 | switch(np->status&0x0F) | |
1264 | { | |
1265 | case 1: | |
4711c841 | 1266 | dev->stats.tx_aborted_errors++; |
6aa20a22 | 1267 | break; /* Max collisions */ |
1da177e4 | 1268 | case 2: |
4711c841 | 1269 | dev->stats.tx_fifo_errors++; |
1da177e4 LT |
1270 | break; |
1271 | case 3: | |
4711c841 | 1272 | dev->stats.tx_carrier_errors++; |
1da177e4 LT |
1273 | break; |
1274 | case 4: | |
4711c841 | 1275 | dev->stats.tx_window_errors++; |
6aa20a22 | 1276 | break; /* CTS Lost */ |
1da177e4 | 1277 | case 5: |
4711c841 | 1278 | dev->stats.tx_aborted_errors++; |
6aa20a22 | 1279 | break; /* Transmit timeout */ |
1da177e4 LT |
1280 | } |
1281 | } | |
1282 | /* Packets are sent in order - this is | |
1283 | basically a FIFO queue of buffers matching | |
1284 | the card ring */ | |
4711c841 | 1285 | dev->stats.tx_bytes+=lp->tx_ring[t].skb->len; |
1da177e4 LT |
1286 | dev_kfree_skb_irq(lp->tx_ring[t].skb); |
1287 | lp->tx_ring[t].skb=NULL; | |
1288 | atomic_inc(&lp->tx_count); | |
1289 | netif_wake_queue(dev); | |
1290 | ||
6aa20a22 | 1291 | lp->tx_ring_tail=t; |
1da177e4 LT |
1292 | } |
1293 | ||
6aa20a22 | 1294 | } |
1da177e4 LT |
1295 | |
1296 | ||
1297 | /** | |
1298 | * mc32_interrupt - handle an interrupt from a 3c527 | |
1299 | * @irq: Interrupt number | |
1300 | * @dev_id: 3c527 that requires servicing | |
1301 | * @regs: Registers (unused) | |
1302 | * | |
1303 | * | |
1304 | * An interrupt is raised whenever the 3c527 writes to the command | |
1305 | * register. This register contains the message it wishes to send us | |
1306 | * packed into a single byte field. We keep reading status entries | |
1307 | * until we have processed all the control items, but simply count | |
1308 | * transmit and receive reports. When all reports are in we empty the | |
1309 | * transceiver rings as appropriate. This saves the overhead of | |
1310 | * multiple command requests. | |
1311 | * | |
1312 | * Because MCA is level-triggered, we shouldn't miss indications. | |
1313 | * Therefore, we needn't ask the card to suspend interrupts within | |
1314 | * this handler. The card receives an implicit acknowledgment of the | |
1315 | * current interrupt when we read the command register. | |
1316 | * | |
1317 | */ | |
1318 | ||
7d12e780 | 1319 | static irqreturn_t mc32_interrupt(int irq, void *dev_id) |
1da177e4 LT |
1320 | { |
1321 | struct net_device *dev = dev_id; | |
1322 | struct mc32_local *lp; | |
1323 | int ioaddr, status, boguscount = 0; | |
1324 | int rx_event = 0; | |
6aa20a22 JG |
1325 | int tx_event = 0; |
1326 | ||
1da177e4 LT |
1327 | ioaddr = dev->base_addr; |
1328 | lp = netdev_priv(dev); | |
1329 | ||
1330 | /* See whats cooking */ | |
1331 | ||
1332 | while((inb(ioaddr+HOST_STATUS)&HOST_STATUS_CWR) && boguscount++<2000) | |
1333 | { | |
1334 | status=inb(ioaddr+HOST_CMD); | |
1335 | ||
39738e16 | 1336 | pr_debug("Status TX%d RX%d EX%d OV%d BC%d\n", |
1da177e4 LT |
1337 | (status&7), (status>>3)&7, (status>>6)&1, |
1338 | (status>>7)&1, boguscount); | |
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: | |
39738e16 | 1353 | pr_notice("%s: strange tx ack %d\n", dev->name, status&7); |
1da177e4 LT |
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 */ | |
4711c841 | 1370 | dev->stats.rx_dropped++; |
6aa20a22 JG |
1371 | mc32_rx_ring(dev); |
1372 | mc32_start_transceiver(dev); | |
1da177e4 LT |
1373 | break; |
1374 | default: | |
39738e16 | 1375 | pr_notice("%s: strange rx ack %d\n", |
6aa20a22 | 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 | { | |
6aa20a22 | 1492 | mc32_update_stats(dev); |
4711c841 | 1493 | return &dev->stats; |
1da177e4 LT |
1494 | } |
1495 | ||
1496 | ||
1497 | /** | |
1498 | * do_mc32_set_multicast_list - attempt to update multicasts | |
1499 | * @dev: 3c527 device to load the list on | |
6aa20a22 | 1500 | * @retry: indicates this is not the first call. |
1da177e4 LT |
1501 | * |
1502 | * | |
1503 | * Actually set or clear the multicast filter for this adaptor. The | |
1504 | * locking issues are handled by this routine. We have to track | |
1505 | * state as it may take multiple calls to get the command sequence | |
1506 | * completed. We just keep trying to schedule the loads until we | |
1507 | * manage to process them all. | |
6aa20a22 | 1508 | * |
1da177e4 | 1509 | * num_addrs == -1 Promiscuous mode, receive all packets |
6aa20a22 | 1510 | * |
1da177e4 | 1511 | * num_addrs == 0 Normal mode, clear multicast list |
1da177e4 | 1512 | * |
6aa20a22 JG |
1513 | * num_addrs > 0 Multicast mode, receive normal and MC packets, |
1514 | * and do best-effort filtering. | |
1515 | * | |
1516 | * See mc32_update_stats() regards setting the SAV BP bit. | |
1da177e4 LT |
1517 | * |
1518 | */ | |
1519 | ||
1520 | static void do_mc32_set_multicast_list(struct net_device *dev, int retry) | |
1521 | { | |
1522 | struct mc32_local *lp = netdev_priv(dev); | |
6aa20a22 | 1523 | u16 filt = (1<<2); /* Save Bad Packets, for stats purposes */ |
1da177e4 | 1524 | |
c16d1185 WC |
1525 | if ((dev->flags&IFF_PROMISC) || |
1526 | (dev->flags&IFF_ALLMULTI) || | |
1527 | dev->mc_count > 10) | |
1da177e4 LT |
1528 | /* Enable promiscuous mode */ |
1529 | filt |= 1; | |
1da177e4 LT |
1530 | else if(dev->mc_count) |
1531 | { | |
1532 | unsigned char block[62]; | |
1533 | unsigned char *bp; | |
1534 | struct dev_mc_list *dmc=dev->mc_list; | |
6aa20a22 | 1535 | |
1da177e4 | 1536 | int i; |
6aa20a22 | 1537 | |
1da177e4 LT |
1538 | if(retry==0) |
1539 | lp->mc_list_valid = 0; | |
1540 | if(!lp->mc_list_valid) | |
1541 | { | |
1542 | block[1]=0; | |
1543 | block[0]=dev->mc_count; | |
1544 | bp=block+2; | |
6aa20a22 | 1545 | |
1da177e4 LT |
1546 | for(i=0;i<dev->mc_count;i++) |
1547 | { | |
1548 | memcpy(bp, dmc->dmi_addr, 6); | |
1549 | bp+=6; | |
1550 | dmc=dmc->next; | |
1551 | } | |
1552 | if(mc32_command_nowait(dev, 2, block, 2+6*dev->mc_count)==-1) | |
1553 | { | |
1554 | lp->mc_reload_wait = 1; | |
1555 | return; | |
1556 | } | |
1557 | lp->mc_list_valid=1; | |
1558 | } | |
1559 | } | |
6aa20a22 JG |
1560 | |
1561 | if(mc32_command_nowait(dev, 0, &filt, 2)==-1) | |
1da177e4 LT |
1562 | { |
1563 | lp->mc_reload_wait = 1; | |
6aa20a22 JG |
1564 | } |
1565 | else { | |
1da177e4 LT |
1566 | lp->mc_reload_wait = 0; |
1567 | } | |
1568 | } | |
1569 | ||
1570 | ||
1571 | /** | |
1572 | * mc32_set_multicast_list - queue multicast list update | |
1573 | * @dev: The 3c527 to use | |
1574 | * | |
1575 | * Commence loading the multicast list. This is called when the kernel | |
1576 | * changes the lists. It will override any pending list we are trying to | |
1577 | * load. | |
1578 | */ | |
1579 | ||
1580 | static void mc32_set_multicast_list(struct net_device *dev) | |
1581 | { | |
1582 | do_mc32_set_multicast_list(dev,0); | |
1583 | } | |
1584 | ||
1585 | ||
1586 | /** | |
1587 | * mc32_reset_multicast_list - reset multicast list | |
1588 | * @dev: The 3c527 to use | |
1589 | * | |
1590 | * Attempt the next step in loading the multicast lists. If this attempt | |
1591 | * fails to complete then it will be scheduled and this function called | |
1592 | * again later from elsewhere. | |
1593 | */ | |
1594 | ||
1595 | static void mc32_reset_multicast_list(struct net_device *dev) | |
1596 | { | |
1597 | do_mc32_set_multicast_list(dev,1); | |
1598 | } | |
1599 | ||
1600 | static void netdev_get_drvinfo(struct net_device *dev, | |
1601 | struct ethtool_drvinfo *info) | |
1602 | { | |
1603 | strcpy(info->driver, DRV_NAME); | |
1604 | strcpy(info->version, DRV_VERSION); | |
1605 | sprintf(info->bus_info, "MCA 0x%lx", dev->base_addr); | |
1606 | } | |
1607 | ||
1608 | static u32 netdev_get_msglevel(struct net_device *dev) | |
1609 | { | |
1610 | return mc32_debug; | |
1611 | } | |
1612 | ||
1613 | static void netdev_set_msglevel(struct net_device *dev, u32 level) | |
1614 | { | |
1615 | mc32_debug = level; | |
1616 | } | |
1617 | ||
7282d491 | 1618 | static const struct ethtool_ops netdev_ethtool_ops = { |
1da177e4 LT |
1619 | .get_drvinfo = netdev_get_drvinfo, |
1620 | .get_msglevel = netdev_get_msglevel, | |
1621 | .set_msglevel = netdev_set_msglevel, | |
1622 | }; | |
1623 | ||
1624 | #ifdef MODULE | |
1625 | ||
1626 | static struct net_device *this_device; | |
1627 | ||
1628 | /** | |
1629 | * init_module - entry point | |
1630 | * | |
1631 | * Probe and locate a 3c527 card. This really should probe and locate | |
1632 | * all the 3c527 cards in the machine not just one of them. Yes you can | |
1633 | * insmod multiple modules for now but it's a hack. | |
1634 | */ | |
1635 | ||
96e672c7 | 1636 | int __init init_module(void) |
1da177e4 LT |
1637 | { |
1638 | this_device = mc32_probe(-1); | |
1639 | if (IS_ERR(this_device)) | |
1640 | return PTR_ERR(this_device); | |
1641 | return 0; | |
1642 | } | |
1643 | ||
1644 | /** | |
1645 | * cleanup_module - free resources for an unload | |
1646 | * | |
1647 | * Unloading time. We release the MCA bus resources and the interrupt | |
1648 | * at which point everything is ready to unload. The card must be stopped | |
1649 | * at this point or we would not have been called. When we unload we | |
1650 | * leave the card stopped but not totally shut down. When the card is | |
1651 | * initialized it must be rebooted or the rings reloaded before any | |
1652 | * transmit operations are allowed to start scribbling into memory. | |
1653 | */ | |
1654 | ||
afc8eb46 | 1655 | void __exit cleanup_module(void) |
1da177e4 LT |
1656 | { |
1657 | unregister_netdev(this_device); | |
1658 | cleanup_card(this_device); | |
1659 | free_netdev(this_device); | |
1660 | } | |
1661 | ||
1662 | #endif /* MODULE */ |