ia64/linux-2.6.18-xen.hg

view drivers/net/ne-h8300.c @ 897:329ea0ccb344

balloon: try harder to balloon up under memory pressure.

Currently if the balloon driver is unable to increase the guest's
reservation it assumes the failure was due to reaching its full
allocation, gives up on the ballooning operation and records the limit
it reached as the "hard limit". The driver will not try again until
the target is set again (even to the same value).

However it is possible that ballooning has in fact failed due to
memory pressure in the host and therefore it is desirable to keep
attempting to reach the target in case memory becomes available. The
most likely scenario is that some guests are ballooning down while
others are ballooning up and therefore there is temporary memory
pressure while things stabilise. You would not expect a well behaved
toolstack to ask a domain to balloon to more than its allocation nor
would you expect it to deliberately over-commit memory by setting
balloon targets which exceed the total host memory.

This patch drops the concept of a hard limit and causes the balloon
driver to retry increasing the reservation on a timer in the same
manner as when decreasing the reservation.

Also if we partially succeed in increasing the reservation
(i.e. receive less pages than we asked for) then we may as well keep
those pages rather than returning them to Xen.

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
author Keir Fraser <keir.fraser@citrix.com>
date Fri Jun 05 14:01:20 2009 +0100 (2009-06-05)
parents 831230e53067
children
line source
1 /* ne-h8300.c: A NE2000 clone on H8/300 driver for linux. */
2 /*
3 original ne.c
4 Written 1992-94 by Donald Becker.
6 Copyright 1993 United States Government as represented by the
7 Director, National Security Agency.
9 This software may be used and distributed according to the terms
10 of the GNU General Public License, incorporated herein by reference.
12 The author may be reached as becker@scyld.com, or C/O
13 Scyld Computing Corporation, 410 Severn Ave., Suite 210, Annapolis MD 21403
15 H8/300 modified
16 Yoshinori Sato <ysato@users.sourceforge.jp>
17 */
19 static const char version1[] =
20 "ne-h8300.c:v1.00 2004/04/11 ysato\n";
22 #include <linux/module.h>
23 #include <linux/kernel.h>
24 #include <linux/errno.h>
25 #include <linux/init.h>
26 #include <linux/interrupt.h>
27 #include <linux/delay.h>
28 #include <linux/netdevice.h>
29 #include <linux/etherdevice.h>
30 #include <linux/jiffies.h>
32 #include <asm/system.h>
33 #include <asm/io.h>
34 #include <asm/irq.h>
36 #include "8390.h"
38 #define DRV_NAME "ne-h8300"
40 /* Some defines that people can play with if so inclined. */
42 /* Do we perform extra sanity checks on stuff ? */
43 /* #define NE_SANITY_CHECK */
45 /* Do we implement the read before write bugfix ? */
46 /* #define NE_RW_BUGFIX */
48 /* Do we have a non std. amount of memory? (in units of 256 byte pages) */
49 /* #define PACKETBUF_MEMSIZE 0x40 */
51 /* A zero-terminated list of I/O addresses to be probed at boot. */
53 /* ---- No user-serviceable parts below ---- */
55 #define NE_BASE (dev->base_addr)
56 #define NE_CMD 0x00
57 #define NE_DATAPORT (ei_status.word16?0x20:0x10) /* NatSemi-defined port window offset. */
58 #define NE_RESET (ei_status.word16?0x3f:0x1f) /* Issue a read to reset, a write to clear. */
59 #define NE_IO_EXTENT (ei_status.word16?0x40:0x20)
61 #define NESM_START_PG 0x40 /* First page of TX buffer */
62 #define NESM_STOP_PG 0x80 /* Last page +1 of RX ring */
64 static int ne_probe1(struct net_device *dev, int ioaddr);
66 static int ne_open(struct net_device *dev);
67 static int ne_close(struct net_device *dev);
69 static void ne_reset_8390(struct net_device *dev);
70 static void ne_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr,
71 int ring_page);
72 static void ne_block_input(struct net_device *dev, int count,
73 struct sk_buff *skb, int ring_offset);
74 static void ne_block_output(struct net_device *dev, const int count,
75 const unsigned char *buf, const int start_page);
78 static u32 reg_offset[16];
80 static int __init init_reg_offset(struct net_device *dev,unsigned long base_addr)
81 {
82 struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
83 int i;
84 unsigned char bus_width;
86 bus_width = *(volatile unsigned char *)ABWCR;
87 bus_width &= 1 << ((base_addr >> 21) & 7);
89 for (i = 0; i < sizeof(reg_offset) / sizeof(u32); i++)
90 if (bus_width == 0)
91 reg_offset[i] = i * 2 + 1;
92 else
93 reg_offset[i] = i;
95 ei_local->reg_offset = reg_offset;
96 return 0;
97 }
99 static int __initdata h8300_ne_count = 0;
100 #ifdef CONFIG_H8300H_H8MAX
101 static unsigned long __initdata h8300_ne_base[] = { 0x800600 };
102 static int h8300_ne_irq[] = {EXT_IRQ4};
103 #endif
104 #ifdef CONFIG_H8300H_AKI3068NET
105 static unsigned long __initdata h8300_ne_base[] = { 0x200000 };
106 static int h8300_ne_irq[] = {EXT_IRQ5};
107 #endif
109 static inline int init_dev(struct net_device *dev)
110 {
111 if (h8300_ne_count < (sizeof(h8300_ne_base) / sizeof(unsigned long))) {
112 dev->base_addr = h8300_ne_base[h8300_ne_count];
113 dev->irq = h8300_ne_irq[h8300_ne_count];
114 h8300_ne_count++;
115 return 0;
116 } else
117 return -ENODEV;
118 }
120 /* Probe for various non-shared-memory ethercards.
122 NEx000-clone boards have a Station Address PROM (SAPROM) in the packet
123 buffer memory space. NE2000 clones have 0x57,0x57 in bytes 0x0e,0x0f of
124 the SAPROM, while other supposed NE2000 clones must be detected by their
125 SA prefix.
127 Reading the SAPROM from a word-wide card with the 8390 set in byte-wide
128 mode results in doubled values, which can be detected and compensated for.
130 The probe is also responsible for initializing the card and filling
131 in the 'dev' and 'ei_status' structures.
133 We use the minimum memory size for some ethercard product lines, iff we can't
134 distinguish models. You can increase the packet buffer size by setting
135 PACKETBUF_MEMSIZE. Reported Cabletron packet buffer locations are:
136 E1010 starts at 0x100 and ends at 0x2000.
137 E1010-x starts at 0x100 and ends at 0x8000. ("-x" means "more memory")
138 E2010 starts at 0x100 and ends at 0x4000.
139 E2010-x starts at 0x100 and ends at 0xffff. */
141 static int __init do_ne_probe(struct net_device *dev)
142 {
143 unsigned int base_addr = dev->base_addr;
145 SET_MODULE_OWNER(dev);
147 /* First check any supplied i/o locations. User knows best. <cough> */
148 if (base_addr > 0x1ff) /* Check a single specified location. */
149 return ne_probe1(dev, base_addr);
150 else if (base_addr != 0) /* Don't probe at all. */
151 return -ENXIO;
153 return -ENODEV;
154 }
156 static void cleanup_card(struct net_device *dev)
157 {
158 free_irq(dev->irq, dev);
159 release_region(dev->base_addr, NE_IO_EXTENT);
160 }
162 #ifndef MODULE
163 struct net_device * __init ne_probe(int unit)
164 {
165 struct net_device *dev = alloc_ei_netdev();
166 int err;
168 if (!dev)
169 return ERR_PTR(-ENOMEM);
171 if (init_dev(dev))
172 return ERR_PTR(-ENODEV);
174 sprintf(dev->name, "eth%d", unit);
175 netdev_boot_setup_check(dev);
177 err = init_reg_offset(dev, dev->base_addr);
178 if (err)
179 goto out;
181 err = do_ne_probe(dev);
182 if (err)
183 goto out;
184 return dev;
185 out:
186 free_netdev(dev);
187 return ERR_PTR(err);
188 }
189 #endif
191 static int __init ne_probe1(struct net_device *dev, int ioaddr)
192 {
193 int i;
194 unsigned char SA_prom[16];
195 int wordlength = 2;
196 const char *name = NULL;
197 int start_page, stop_page;
198 int reg0, ret;
199 static unsigned version_printed;
200 struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
201 unsigned char bus_width;
203 if (!request_region(ioaddr, NE_IO_EXTENT, DRV_NAME))
204 return -EBUSY;
206 reg0 = inb_p(ioaddr);
207 if (reg0 == 0xFF) {
208 ret = -ENODEV;
209 goto err_out;
210 }
212 /* Do a preliminary verification that we have a 8390. */
213 {
214 int regd;
215 outb_p(E8390_NODMA+E8390_PAGE1+E8390_STOP, ioaddr + E8390_CMD);
216 regd = inb_p(ioaddr + EI_SHIFT(0x0d));
217 outb_p(0xff, ioaddr + EI_SHIFT(0x0d));
218 outb_p(E8390_NODMA+E8390_PAGE0, ioaddr + E8390_CMD);
219 inb_p(ioaddr + EN0_COUNTER0); /* Clear the counter by reading. */
220 if (inb_p(ioaddr + EN0_COUNTER0) != 0) {
221 outb_p(reg0, ioaddr + EI_SHIFT(0));
222 outb_p(regd, ioaddr + EI_SHIFT(0x0d)); /* Restore the old values. */
223 ret = -ENODEV;
224 goto err_out;
225 }
226 }
228 if (ei_debug && version_printed++ == 0)
229 printk(KERN_INFO "%s", version1);
231 printk(KERN_INFO "NE*000 ethercard probe at %08x:", ioaddr);
233 /* Read the 16 bytes of station address PROM.
234 We must first initialize registers, similar to NS8390_init(eifdev, 0).
235 We can't reliably read the SAPROM address without this.
236 (I learned the hard way!). */
237 {
238 struct {unsigned char value, offset; } program_seq[] =
239 {
240 {E8390_NODMA+E8390_PAGE0+E8390_STOP, E8390_CMD}, /* Select page 0*/
241 {0x48, EN0_DCFG}, /* Set byte-wide (0x48) access. */
242 {0x00, EN0_RCNTLO}, /* Clear the count regs. */
243 {0x00, EN0_RCNTHI},
244 {0x00, EN0_IMR}, /* Mask completion irq. */
245 {0xFF, EN0_ISR},
246 {E8390_RXOFF, EN0_RXCR}, /* 0x20 Set to monitor */
247 {E8390_TXOFF, EN0_TXCR}, /* 0x02 and loopback mode. */
248 {32, EN0_RCNTLO},
249 {0x00, EN0_RCNTHI},
250 {0x00, EN0_RSARLO}, /* DMA starting at 0x0000. */
251 {0x00, EN0_RSARHI},
252 {E8390_RREAD+E8390_START, E8390_CMD},
253 };
255 for (i = 0; i < sizeof(program_seq)/sizeof(program_seq[0]); i++)
256 outb_p(program_seq[i].value, ioaddr + program_seq[i].offset);
258 }
259 bus_width = *(volatile unsigned char *)ABWCR;
260 bus_width &= 1 << ((ioaddr >> 21) & 7);
261 ei_status.word16 = (bus_width == 0); /* temporary setting */
262 for(i = 0; i < 16 /*sizeof(SA_prom)*/; i++) {
263 SA_prom[i] = inb_p(ioaddr + NE_DATAPORT);
264 inb_p(ioaddr + NE_DATAPORT); /* dummy read */
265 }
267 start_page = NESM_START_PG;
268 stop_page = NESM_STOP_PG;
270 if (bus_width)
271 wordlength = 1;
272 else
273 outb_p(0x49, ioaddr + EN0_DCFG);
275 /* Set up the rest of the parameters. */
276 name = (wordlength == 2) ? "NE2000" : "NE1000";
278 if (! dev->irq) {
279 printk(" failed to detect IRQ line.\n");
280 ret = -EAGAIN;
281 goto err_out;
282 }
284 /* Snarf the interrupt now. There's no point in waiting since we cannot
285 share and the board will usually be enabled. */
286 ret = request_irq(dev->irq, ei_interrupt, 0, name, dev);
287 if (ret) {
288 printk (" unable to get IRQ %d (errno=%d).\n", dev->irq, ret);
289 goto err_out;
290 }
292 dev->base_addr = ioaddr;
294 for(i = 0; i < ETHER_ADDR_LEN; i++) {
295 printk(" %2.2x", SA_prom[i]);
296 dev->dev_addr[i] = SA_prom[i];
297 }
299 printk("\n%s: %s found at %#x, using IRQ %d.\n",
300 dev->name, name, ioaddr, dev->irq);
302 ei_status.name = name;
303 ei_status.tx_start_page = start_page;
304 ei_status.stop_page = stop_page;
305 ei_status.word16 = (wordlength == 2);
307 ei_status.rx_start_page = start_page + TX_PAGES;
308 #ifdef PACKETBUF_MEMSIZE
309 /* Allow the packet buffer size to be overridden by know-it-alls. */
310 ei_status.stop_page = ei_status.tx_start_page + PACKETBUF_MEMSIZE;
311 #endif
313 ei_status.reset_8390 = &ne_reset_8390;
314 ei_status.block_input = &ne_block_input;
315 ei_status.block_output = &ne_block_output;
316 ei_status.get_8390_hdr = &ne_get_8390_hdr;
317 ei_status.priv = 0;
318 dev->open = &ne_open;
319 dev->stop = &ne_close;
320 #ifdef CONFIG_NET_POLL_CONTROLLER
321 dev->poll_controller = ei_poll;
322 #endif
323 NS8390_init(dev, 0);
325 ret = register_netdev(dev);
326 if (ret)
327 goto out_irq;
328 return 0;
329 out_irq:
330 free_irq(dev->irq, dev);
331 err_out:
332 release_region(ioaddr, NE_IO_EXTENT);
333 return ret;
334 }
336 static int ne_open(struct net_device *dev)
337 {
338 ei_open(dev);
339 return 0;
340 }
342 static int ne_close(struct net_device *dev)
343 {
344 if (ei_debug > 1)
345 printk(KERN_DEBUG "%s: Shutting down ethercard.\n", dev->name);
346 ei_close(dev);
347 return 0;
348 }
350 /* Hard reset the card. This used to pause for the same period that a
351 8390 reset command required, but that shouldn't be necessary. */
353 static void ne_reset_8390(struct net_device *dev)
354 {
355 unsigned long reset_start_time = jiffies;
356 struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
358 if (ei_debug > 1)
359 printk(KERN_DEBUG "resetting the 8390 t=%ld...", jiffies);
361 /* DON'T change these to inb_p/outb_p or reset will fail on clones. */
362 outb(inb(NE_BASE + NE_RESET), NE_BASE + NE_RESET);
364 ei_status.txing = 0;
365 ei_status.dmaing = 0;
367 /* This check _should_not_ be necessary, omit eventually. */
368 while ((inb_p(NE_BASE+EN0_ISR) & ENISR_RESET) == 0)
369 if (time_after(jiffies, reset_start_time + 2*HZ/100)) {
370 printk(KERN_WARNING "%s: ne_reset_8390() did not complete.\n", dev->name);
371 break;
372 }
373 outb_p(ENISR_RESET, NE_BASE + EN0_ISR); /* Ack intr. */
374 }
376 /* Grab the 8390 specific header. Similar to the block_input routine, but
377 we don't need to be concerned with ring wrap as the header will be at
378 the start of a page, so we optimize accordingly. */
380 static void ne_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, int ring_page)
381 {
382 struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
383 /* This *shouldn't* happen. If it does, it's the last thing you'll see */
385 if (ei_status.dmaing)
386 {
387 printk(KERN_EMERG "%s: DMAing conflict in ne_get_8390_hdr "
388 "[DMAstat:%d][irqlock:%d].\n",
389 dev->name, ei_status.dmaing, ei_status.irqlock);
390 return;
391 }
393 ei_status.dmaing |= 0x01;
394 outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, NE_BASE + NE_CMD);
395 outb_p(sizeof(struct e8390_pkt_hdr), NE_BASE + EN0_RCNTLO);
396 outb_p(0, NE_BASE + EN0_RCNTHI);
397 outb_p(0, NE_BASE + EN0_RSARLO); /* On page boundary */
398 outb_p(ring_page, NE_BASE + EN0_RSARHI);
399 outb_p(E8390_RREAD+E8390_START, NE_BASE + NE_CMD);
401 if (ei_status.word16) {
402 int len;
403 unsigned short *p = (unsigned short *)hdr;
404 for (len = sizeof(struct e8390_pkt_hdr)>>1; len > 0; len--)
405 *p++ = inw(NE_BASE + NE_DATAPORT);
406 } else
407 insb(NE_BASE + NE_DATAPORT, hdr, sizeof(struct e8390_pkt_hdr));
409 outb_p(ENISR_RDC, NE_BASE + EN0_ISR); /* Ack intr. */
410 ei_status.dmaing &= ~0x01;
412 le16_to_cpus(&hdr->count);
413 }
415 /* Block input and output, similar to the Crynwr packet driver. If you
416 are porting to a new ethercard, look at the packet driver source for hints.
417 The NEx000 doesn't share the on-board packet memory -- you have to put
418 the packet out through the "remote DMA" dataport using outb. */
420 static void ne_block_input(struct net_device *dev, int count, struct sk_buff *skb, int ring_offset)
421 {
422 struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
423 #ifdef NE_SANITY_CHECK
424 int xfer_count = count;
425 #endif
426 char *buf = skb->data;
428 /* This *shouldn't* happen. If it does, it's the last thing you'll see */
429 if (ei_status.dmaing)
430 {
431 printk(KERN_EMERG "%s: DMAing conflict in ne_block_input "
432 "[DMAstat:%d][irqlock:%d].\n",
433 dev->name, ei_status.dmaing, ei_status.irqlock);
434 return;
435 }
436 ei_status.dmaing |= 0x01;
437 outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, NE_BASE + NE_CMD);
438 outb_p(count & 0xff, NE_BASE + EN0_RCNTLO);
439 outb_p(count >> 8, NE_BASE + EN0_RCNTHI);
440 outb_p(ring_offset & 0xff, NE_BASE + EN0_RSARLO);
441 outb_p(ring_offset >> 8, NE_BASE + EN0_RSARHI);
442 outb_p(E8390_RREAD+E8390_START, NE_BASE + NE_CMD);
443 if (ei_status.word16)
444 {
445 int len;
446 unsigned short *p = (unsigned short *)buf;
447 for (len = count>>1; len > 0; len--)
448 *p++ = inw(NE_BASE + NE_DATAPORT);
449 if (count & 0x01)
450 {
451 buf[count-1] = inb(NE_BASE + NE_DATAPORT);
452 #ifdef NE_SANITY_CHECK
453 xfer_count++;
454 #endif
455 }
456 } else {
457 insb(NE_BASE + NE_DATAPORT, buf, count);
458 }
460 #ifdef NE_SANITY_CHECK
461 /* This was for the ALPHA version only, but enough people have
462 been encountering problems so it is still here. If you see
463 this message you either 1) have a slightly incompatible clone
464 or 2) have noise/speed problems with your bus. */
466 if (ei_debug > 1)
467 {
468 /* DMA termination address check... */
469 int addr, tries = 20;
470 do {
471 /* DON'T check for 'inb_p(EN0_ISR) & ENISR_RDC' here
472 -- it's broken for Rx on some cards! */
473 int high = inb_p(NE_BASE + EN0_RSARHI);
474 int low = inb_p(NE_BASE + EN0_RSARLO);
475 addr = (high << 8) + low;
476 if (((ring_offset + xfer_count) & 0xff) == low)
477 break;
478 } while (--tries > 0);
479 if (tries <= 0)
480 printk(KERN_WARNING "%s: RX transfer address mismatch,"
481 "%#4.4x (expected) vs. %#4.4x (actual).\n",
482 dev->name, ring_offset + xfer_count, addr);
483 }
484 #endif
485 outb_p(ENISR_RDC, NE_BASE + EN0_ISR); /* Ack intr. */
486 ei_status.dmaing &= ~0x01;
487 }
489 static void ne_block_output(struct net_device *dev, int count,
490 const unsigned char *buf, const int start_page)
491 {
492 struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
493 unsigned long dma_start;
494 #ifdef NE_SANITY_CHECK
495 int retries = 0;
496 #endif
498 /* Round the count up for word writes. Do we need to do this?
499 What effect will an odd byte count have on the 8390?
500 I should check someday. */
502 if (ei_status.word16 && (count & 0x01))
503 count++;
505 /* This *shouldn't* happen. If it does, it's the last thing you'll see */
506 if (ei_status.dmaing)
507 {
508 printk(KERN_EMERG "%s: DMAing conflict in ne_block_output."
509 "[DMAstat:%d][irqlock:%d]\n",
510 dev->name, ei_status.dmaing, ei_status.irqlock);
511 return;
512 }
513 ei_status.dmaing |= 0x01;
514 /* We should already be in page 0, but to be safe... */
515 outb_p(E8390_PAGE0+E8390_START+E8390_NODMA, NE_BASE + NE_CMD);
517 #ifdef NE_SANITY_CHECK
518 retry:
519 #endif
521 #ifdef NE8390_RW_BUGFIX
522 /* Handle the read-before-write bug the same way as the
523 Crynwr packet driver -- the NatSemi method doesn't work.
524 Actually this doesn't always work either, but if you have
525 problems with your NEx000 this is better than nothing! */
527 outb_p(0x42, NE_BASE + EN0_RCNTLO);
528 outb_p(0x00, NE_BASE + EN0_RCNTHI);
529 outb_p(0x42, NE_BASE + EN0_RSARLO);
530 outb_p(0x00, NE_BASE + EN0_RSARHI);
531 outb_p(E8390_RREAD+E8390_START, NE_BASE + NE_CMD);
532 /* Make certain that the dummy read has occurred. */
533 udelay(6);
534 #endif
536 outb_p(ENISR_RDC, NE_BASE + EN0_ISR);
538 /* Now the normal output. */
539 outb_p(count & 0xff, NE_BASE + EN0_RCNTLO);
540 outb_p(count >> 8, NE_BASE + EN0_RCNTHI);
541 outb_p(0x00, NE_BASE + EN0_RSARLO);
542 outb_p(start_page, NE_BASE + EN0_RSARHI);
544 outb_p(E8390_RWRITE+E8390_START, NE_BASE + NE_CMD);
545 if (ei_status.word16) {
546 int len;
547 unsigned short *p = (unsigned short *)buf;
548 for (len = count>>1; len > 0; len--)
549 outw(*p++, NE_BASE + NE_DATAPORT);
550 } else {
551 outsb(NE_BASE + NE_DATAPORT, buf, count);
552 }
554 dma_start = jiffies;
556 #ifdef NE_SANITY_CHECK
557 /* This was for the ALPHA version only, but enough people have
558 been encountering problems so it is still here. */
560 if (ei_debug > 1)
561 {
562 /* DMA termination address check... */
563 int addr, tries = 20;
564 do {
565 int high = inb_p(NE_BASE + EN0_RSARHI);
566 int low = inb_p(NE_BASE + EN0_RSARLO);
567 addr = (high << 8) + low;
568 if ((start_page << 8) + count == addr)
569 break;
570 } while (--tries > 0);
572 if (tries <= 0)
573 {
574 printk(KERN_WARNING "%s: Tx packet transfer address mismatch,"
575 "%#4.4x (expected) vs. %#4.4x (actual).\n",
576 dev->name, (start_page << 8) + count, addr);
577 if (retries++ == 0)
578 goto retry;
579 }
580 }
581 #endif
583 while ((inb_p(NE_BASE + EN0_ISR) & ENISR_RDC) == 0)
584 if (time_after(jiffies, dma_start + 2*HZ/100)) { /* 20ms */
585 printk(KERN_WARNING "%s: timeout waiting for Tx RDC.\n", dev->name);
586 ne_reset_8390(dev);
587 NS8390_init(dev,1);
588 break;
589 }
591 outb_p(ENISR_RDC, NE_BASE + EN0_ISR); /* Ack intr. */
592 ei_status.dmaing &= ~0x01;
593 return;
594 }
597 #ifdef MODULE
598 #define MAX_NE_CARDS 1 /* Max number of NE cards per module */
599 static struct net_device *dev_ne[MAX_NE_CARDS];
600 static int io[MAX_NE_CARDS];
601 static int irq[MAX_NE_CARDS];
602 static int bad[MAX_NE_CARDS]; /* 0xbad = bad sig or no reset ack */
604 module_param_array(io, int, NULL, 0);
605 module_param_array(irq, int, NULL, 0);
606 module_param_array(bad, int, NULL, 0);
607 MODULE_PARM_DESC(io, "I/O base address(es)");
608 MODULE_PARM_DESC(irq, "IRQ number(s)");
609 MODULE_DESCRIPTION("H8/300 NE2000 Ethernet driver");
610 MODULE_LICENSE("GPL");
612 /* This is set up so that no ISA autoprobe takes place. We can't guarantee
613 that the ne2k probe is the last 8390 based probe to take place (as it
614 is at boot) and so the probe will get confused by any other 8390 cards.
615 ISA device autoprobes on a running machine are not recommended anyway. */
617 int init_module(void)
618 {
619 int this_dev, found = 0;
620 int err;
622 for (this_dev = 0; this_dev < MAX_NE_CARDS; this_dev++) {
623 struct net_device *dev = alloc_ei_netdev();
624 if (!dev)
625 break;
626 if (io[this_dev]) {
627 dev->irq = irq[this_dev];
628 dev->mem_end = bad[this_dev];
629 dev->base_addr = io[this_dev];
630 } else {
631 dev->base_addr = h8300_ne_base[this_dev];
632 dev->irq = h8300_ne_irq[this_dev];
633 }
634 err = init_reg_offset(dev, dev->base_addr);
635 if (!err) {
636 if (do_ne_probe(dev) == 0) {
637 dev_ne[found++] = dev;
638 continue;
639 }
640 }
641 free_netdev(dev);
642 if (found)
643 break;
644 if (io[this_dev] != 0)
645 printk(KERN_WARNING "ne.c: No NE*000 card found at i/o = %#x\n", dev->base_addr);
646 else
647 printk(KERN_NOTICE "ne.c: You must supply \"io=0xNNN\" value(s) for ISA cards.\n");
648 return -ENXIO;
649 }
650 if (found)
651 return 0;
652 return -ENODEV;
653 }
655 void cleanup_module(void)
656 {
657 int this_dev;
659 for (this_dev = 0; this_dev < MAX_NE_CARDS; this_dev++) {
660 struct net_device *dev = dev_ne[this_dev];
661 if (dev) {
662 unregister_netdev(dev);
663 cleanup_card(dev);
664 free_netdev(dev);
665 }
666 }
667 }
668 #endif /* MODULE */