ia64/linux-2.6.18-xen.hg

view drivers/net/ne.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.c: A general non-shared-memory NS8390 ethernet driver for linux. */
2 /*
3 Written 1992-94 by Donald Becker.
5 Copyright 1993 United States Government as represented by the
6 Director, National Security Agency.
8 This software may be used and distributed according to the terms
9 of the GNU General Public License, incorporated herein by reference.
11 The author may be reached as becker@scyld.com, or C/O
12 Scyld Computing Corporation, 410 Severn Ave., Suite 210, Annapolis MD 21403
14 This driver should work with many programmed-I/O 8390-based ethernet
15 boards. Currently it supports the NE1000, NE2000, many clones,
16 and some Cabletron products.
18 Changelog:
20 Paul Gortmaker : use ENISR_RDC to monitor Tx PIO uploads, made
21 sanity checks and bad clone support optional.
22 Paul Gortmaker : new reset code, reset card after probe at boot.
23 Paul Gortmaker : multiple card support for module users.
24 Paul Gortmaker : Support for PCI ne2k clones, similar to lance.c
25 Paul Gortmaker : Allow users with bad cards to avoid full probe.
26 Paul Gortmaker : PCI probe changes, more PCI cards supported.
27 rjohnson@analogic.com : Changed init order so an interrupt will only
28 occur after memory is allocated for dev->priv. Deallocated memory
29 last in cleanup_modue()
30 Richard Guenther : Added support for ISAPnP cards
31 Paul Gortmaker : Discontinued PCI support - use ne2k-pci.c instead.
32 Hayato Fujiwara : Add m32r support.
34 */
36 /* Routines for the NatSemi-based designs (NE[12]000). */
38 static const char version1[] =
39 "ne.c:v1.10 9/23/94 Donald Becker (becker@scyld.com)\n";
40 static const char version2[] =
41 "Last modified Nov 1, 2000 by Paul Gortmaker\n";
44 #include <linux/module.h>
45 #include <linux/kernel.h>
46 #include <linux/errno.h>
47 #include <linux/isapnp.h>
48 #include <linux/init.h>
49 #include <linux/interrupt.h>
50 #include <linux/delay.h>
51 #include <linux/netdevice.h>
52 #include <linux/etherdevice.h>
53 #include <linux/jiffies.h>
55 #include <asm/system.h>
56 #include <asm/io.h>
58 #if defined(CONFIG_TOSHIBA_RBTX4927) || defined(CONFIG_TOSHIBA_RBTX4938)
59 #include <asm/tx4938/rbtx4938.h>
60 #endif
62 #include "8390.h"
64 #define DRV_NAME "ne"
66 /* Some defines that people can play with if so inclined. */
68 /* Do we support clones that don't adhere to 14,15 of the SAprom ? */
69 #define SUPPORT_NE_BAD_CLONES
71 /* Do we perform extra sanity checks on stuff ? */
72 /* #define NE_SANITY_CHECK */
74 /* Do we implement the read before write bugfix ? */
75 /* #define NE_RW_BUGFIX */
77 /* Do we have a non std. amount of memory? (in units of 256 byte pages) */
78 /* #define PACKETBUF_MEMSIZE 0x40 */
80 /* A zero-terminated list of I/O addresses to be probed at boot. */
81 #ifndef MODULE
82 static unsigned int netcard_portlist[] __initdata = {
83 0x300, 0x280, 0x320, 0x340, 0x360, 0x380, 0
84 };
85 #endif
87 static struct isapnp_device_id isapnp_clone_list[] __initdata = {
88 { ISAPNP_CARD_ID('A','X','E',0x2011),
89 ISAPNP_VENDOR('A','X','E'), ISAPNP_FUNCTION(0x2011),
90 (long) "NetGear EA201" },
91 { ISAPNP_ANY_ID, ISAPNP_ANY_ID,
92 ISAPNP_VENDOR('E','D','I'), ISAPNP_FUNCTION(0x0216),
93 (long) "NN NE2000" },
94 { ISAPNP_ANY_ID, ISAPNP_ANY_ID,
95 ISAPNP_VENDOR('P','N','P'), ISAPNP_FUNCTION(0x80d6),
96 (long) "Generic PNP" },
97 { } /* terminate list */
98 };
100 MODULE_DEVICE_TABLE(isapnp, isapnp_clone_list);
102 #ifdef SUPPORT_NE_BAD_CLONES
103 /* A list of bad clones that we none-the-less recognize. */
104 static struct { const char *name8, *name16; unsigned char SAprefix[4];}
105 bad_clone_list[] __initdata = {
106 {"DE100", "DE200", {0x00, 0xDE, 0x01,}},
107 {"DE120", "DE220", {0x00, 0x80, 0xc8,}},
108 {"DFI1000", "DFI2000", {'D', 'F', 'I',}}, /* Original, eh? */
109 {"EtherNext UTP8", "EtherNext UTP16", {0x00, 0x00, 0x79}},
110 {"NE1000","NE2000-invalid", {0x00, 0x00, 0xd8}}, /* Ancient real NE1000. */
111 {"NN1000", "NN2000", {0x08, 0x03, 0x08}}, /* Outlaw no-name clone. */
112 {"4-DIM8","4-DIM16", {0x00,0x00,0x4d,}}, /* Outlaw 4-Dimension cards. */
113 {"Con-Intl_8", "Con-Intl_16", {0x00, 0x00, 0x24}}, /* Connect Int'nl */
114 {"ET-100","ET-200", {0x00, 0x45, 0x54}}, /* YANG and YA clone */
115 {"COMPEX","COMPEX16",{0x00,0x80,0x48}}, /* Broken ISA Compex cards */
116 {"E-LAN100", "E-LAN200", {0x00, 0x00, 0x5d}}, /* Broken ne1000 clones */
117 {"PCM-4823", "PCM-4823", {0x00, 0xc0, 0x6c}}, /* Broken Advantech MoBo */
118 {"REALTEK", "RTL8019", {0x00, 0x00, 0xe8}}, /* no-name with Realtek chip */
119 #if defined(CONFIG_TOSHIBA_RBTX4927) || defined(CONFIG_TOSHIBA_RBTX4938)
120 {"RBHMA4X00-RTL8019", "RBHMA4X00/RTL8019", {0x00, 0x60, 0x0a}}, /* Toshiba built-in */
121 #endif
122 {"LCS-8834", "LCS-8836", {0x04, 0x04, 0x37}}, /* ShinyNet (SET) */
123 {NULL,}
124 };
125 #endif
127 /* ---- No user-serviceable parts below ---- */
129 #define NE_BASE (dev->base_addr)
130 #define NE_CMD 0x00
131 #define NE_DATAPORT 0x10 /* NatSemi-defined port window offset. */
132 #define NE_RESET 0x1f /* Issue a read to reset, a write to clear. */
133 #define NE_IO_EXTENT 0x20
135 #define NE1SM_START_PG 0x20 /* First page of TX buffer */
136 #define NE1SM_STOP_PG 0x40 /* Last page +1 of RX ring */
137 #define NESM_START_PG 0x40 /* First page of TX buffer */
138 #define NESM_STOP_PG 0x80 /* Last page +1 of RX ring */
140 #if defined(CONFIG_PLAT_MAPPI)
141 # define DCR_VAL 0x4b
142 #elif defined(CONFIG_PLAT_OAKS32R) || \
143 defined(CONFIG_TOSHIBA_RBTX4927) || defined(CONFIG_TOSHIBA_RBTX4938)
144 # define DCR_VAL 0x48 /* 8-bit mode */
145 #else
146 # define DCR_VAL 0x49
147 #endif
149 static int ne_probe1(struct net_device *dev, int ioaddr);
150 static int ne_probe_isapnp(struct net_device *dev);
152 static int ne_open(struct net_device *dev);
153 static int ne_close(struct net_device *dev);
155 static void ne_reset_8390(struct net_device *dev);
156 static void ne_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr,
157 int ring_page);
158 static void ne_block_input(struct net_device *dev, int count,
159 struct sk_buff *skb, int ring_offset);
160 static void ne_block_output(struct net_device *dev, const int count,
161 const unsigned char *buf, const int start_page);
164 /* Probe for various non-shared-memory ethercards.
166 NEx000-clone boards have a Station Address PROM (SAPROM) in the packet
167 buffer memory space. NE2000 clones have 0x57,0x57 in bytes 0x0e,0x0f of
168 the SAPROM, while other supposed NE2000 clones must be detected by their
169 SA prefix.
171 Reading the SAPROM from a word-wide card with the 8390 set in byte-wide
172 mode results in doubled values, which can be detected and compensated for.
174 The probe is also responsible for initializing the card and filling
175 in the 'dev' and 'ei_status' structures.
177 We use the minimum memory size for some ethercard product lines, iff we can't
178 distinguish models. You can increase the packet buffer size by setting
179 PACKETBUF_MEMSIZE. Reported Cabletron packet buffer locations are:
180 E1010 starts at 0x100 and ends at 0x2000.
181 E1010-x starts at 0x100 and ends at 0x8000. ("-x" means "more memory")
182 E2010 starts at 0x100 and ends at 0x4000.
183 E2010-x starts at 0x100 and ends at 0xffff. */
185 static int __init do_ne_probe(struct net_device *dev)
186 {
187 unsigned int base_addr = dev->base_addr;
188 #ifndef MODULE
189 int orig_irq = dev->irq;
190 #endif
192 SET_MODULE_OWNER(dev);
194 /* First check any supplied i/o locations. User knows best. <cough> */
195 if (base_addr > 0x1ff) /* Check a single specified location. */
196 return ne_probe1(dev, base_addr);
197 else if (base_addr != 0) /* Don't probe at all. */
198 return -ENXIO;
200 /* Then look for any installed ISAPnP clones */
201 if (isapnp_present() && (ne_probe_isapnp(dev) == 0))
202 return 0;
204 #ifndef MODULE
205 /* Last resort. The semi-risky ISA auto-probe. */
206 for (base_addr = 0; netcard_portlist[base_addr] != 0; base_addr++) {
207 int ioaddr = netcard_portlist[base_addr];
208 dev->irq = orig_irq;
209 if (ne_probe1(dev, ioaddr) == 0)
210 return 0;
211 }
212 #endif
214 return -ENODEV;
215 }
217 #ifndef MODULE
218 struct net_device * __init ne_probe(int unit)
219 {
220 struct net_device *dev = alloc_ei_netdev();
221 int err;
223 if (!dev)
224 return ERR_PTR(-ENOMEM);
226 sprintf(dev->name, "eth%d", unit);
227 netdev_boot_setup_check(dev);
229 #ifdef CONFIG_TOSHIBA_RBTX4938
230 dev->base_addr = RBTX4938_RTL_8019_BASE;
231 dev->irq = RBTX4938_RTL_8019_IRQ;
232 #endif
233 err = do_ne_probe(dev);
234 if (err)
235 goto out;
236 return dev;
237 out:
238 free_netdev(dev);
239 return ERR_PTR(err);
240 }
241 #endif
243 static int __init ne_probe_isapnp(struct net_device *dev)
244 {
245 int i;
247 for (i = 0; isapnp_clone_list[i].vendor != 0; i++) {
248 struct pnp_dev *idev = NULL;
250 while ((idev = pnp_find_dev(NULL,
251 isapnp_clone_list[i].vendor,
252 isapnp_clone_list[i].function,
253 idev))) {
254 /* Avoid already found cards from previous calls */
255 if (pnp_device_attach(idev) < 0)
256 continue;
257 if (pnp_activate_dev(idev) < 0) {
258 pnp_device_detach(idev);
259 continue;
260 }
261 /* if no io and irq, search for next */
262 if (!pnp_port_valid(idev, 0) || !pnp_irq_valid(idev, 0)) {
263 pnp_device_detach(idev);
264 continue;
265 }
266 /* found it */
267 dev->base_addr = pnp_port_start(idev, 0);
268 dev->irq = pnp_irq(idev, 0);
269 printk(KERN_INFO "ne.c: ISAPnP reports %s at i/o %#lx, irq %d.\n",
270 (char *) isapnp_clone_list[i].driver_data,
271 dev->base_addr, dev->irq);
272 if (ne_probe1(dev, dev->base_addr) != 0) { /* Shouldn't happen. */
273 printk(KERN_ERR "ne.c: Probe of ISAPnP card at %#lx failed.\n", dev->base_addr);
274 pnp_device_detach(idev);
275 return -ENXIO;
276 }
277 ei_status.priv = (unsigned long)idev;
278 break;
279 }
280 if (!idev)
281 continue;
282 return 0;
283 }
285 return -ENODEV;
286 }
288 static int __init ne_probe1(struct net_device *dev, int ioaddr)
289 {
290 int i;
291 unsigned char SA_prom[32];
292 int wordlength = 2;
293 const char *name = NULL;
294 int start_page, stop_page;
295 int neX000, ctron, copam, bad_card;
296 int reg0, ret;
297 static unsigned version_printed;
299 if (!request_region(ioaddr, NE_IO_EXTENT, DRV_NAME))
300 return -EBUSY;
302 reg0 = inb_p(ioaddr);
303 if (reg0 == 0xFF) {
304 ret = -ENODEV;
305 goto err_out;
306 }
308 /* Do a preliminary verification that we have a 8390. */
309 {
310 int regd;
311 outb_p(E8390_NODMA+E8390_PAGE1+E8390_STOP, ioaddr + E8390_CMD);
312 regd = inb_p(ioaddr + 0x0d);
313 outb_p(0xff, ioaddr + 0x0d);
314 outb_p(E8390_NODMA+E8390_PAGE0, ioaddr + E8390_CMD);
315 inb_p(ioaddr + EN0_COUNTER0); /* Clear the counter by reading. */
316 if (inb_p(ioaddr + EN0_COUNTER0) != 0) {
317 outb_p(reg0, ioaddr);
318 outb_p(regd, ioaddr + 0x0d); /* Restore the old values. */
319 ret = -ENODEV;
320 goto err_out;
321 }
322 }
324 if (ei_debug && version_printed++ == 0)
325 printk(KERN_INFO "%s" KERN_INFO "%s", version1, version2);
327 printk(KERN_INFO "NE*000 ethercard probe at %#3x:", ioaddr);
329 /* A user with a poor card that fails to ack the reset, or that
330 does not have a valid 0x57,0x57 signature can still use this
331 without having to recompile. Specifying an i/o address along
332 with an otherwise unused dev->mem_end value of "0xBAD" will
333 cause the driver to skip these parts of the probe. */
335 bad_card = ((dev->base_addr != 0) && (dev->mem_end == 0xbad));
337 /* Reset card. Who knows what dain-bramaged state it was left in. */
339 {
340 unsigned long reset_start_time = jiffies;
342 /* DON'T change these to inb_p/outb_p or reset will fail on clones. */
343 outb(inb(ioaddr + NE_RESET), ioaddr + NE_RESET);
345 while ((inb_p(ioaddr + EN0_ISR) & ENISR_RESET) == 0)
346 if (time_after(jiffies, reset_start_time + 2*HZ/100)) {
347 if (bad_card) {
348 printk(" (warning: no reset ack)");
349 break;
350 } else {
351 printk(" not found (no reset ack).\n");
352 ret = -ENODEV;
353 goto err_out;
354 }
355 }
357 outb_p(0xff, ioaddr + EN0_ISR); /* Ack all intr. */
358 }
360 /* Read the 16 bytes of station address PROM.
361 We must first initialize registers, similar to NS8390_init(eifdev, 0).
362 We can't reliably read the SAPROM address without this.
363 (I learned the hard way!). */
364 {
365 struct {unsigned char value, offset; } program_seq[] =
366 {
367 {E8390_NODMA+E8390_PAGE0+E8390_STOP, E8390_CMD}, /* Select page 0*/
368 {0x48, EN0_DCFG}, /* Set byte-wide (0x48) access. */
369 {0x00, EN0_RCNTLO}, /* Clear the count regs. */
370 {0x00, EN0_RCNTHI},
371 {0x00, EN0_IMR}, /* Mask completion irq. */
372 {0xFF, EN0_ISR},
373 {E8390_RXOFF, EN0_RXCR}, /* 0x20 Set to monitor */
374 {E8390_TXOFF, EN0_TXCR}, /* 0x02 and loopback mode. */
375 {32, EN0_RCNTLO},
376 {0x00, EN0_RCNTHI},
377 {0x00, EN0_RSARLO}, /* DMA starting at 0x0000. */
378 {0x00, EN0_RSARHI},
379 {E8390_RREAD+E8390_START, E8390_CMD},
380 };
382 for (i = 0; i < sizeof(program_seq)/sizeof(program_seq[0]); i++)
383 outb_p(program_seq[i].value, ioaddr + program_seq[i].offset);
385 }
386 for(i = 0; i < 32 /*sizeof(SA_prom)*/; i+=2) {
387 SA_prom[i] = inb(ioaddr + NE_DATAPORT);
388 SA_prom[i+1] = inb(ioaddr + NE_DATAPORT);
389 if (SA_prom[i] != SA_prom[i+1])
390 wordlength = 1;
391 }
393 if (wordlength == 2)
394 {
395 for (i = 0; i < 16; i++)
396 SA_prom[i] = SA_prom[i+i];
397 /* We must set the 8390 for word mode. */
398 outb_p(DCR_VAL, ioaddr + EN0_DCFG);
399 start_page = NESM_START_PG;
401 /*
402 * Realtek RTL8019AS datasheet says that the PSTOP register
403 * shouldn't exceed 0x60 in 8-bit mode.
404 * This chip can be identified by reading the signature from
405 * the remote byte count registers (otherwise write-only)...
406 */
407 if ((DCR_VAL & 0x01) == 0 && /* 8-bit mode */
408 inb(ioaddr + EN0_RCNTLO) == 0x50 &&
409 inb(ioaddr + EN0_RCNTHI) == 0x70)
410 stop_page = 0x60;
411 else
412 stop_page = NESM_STOP_PG;
413 } else {
414 start_page = NE1SM_START_PG;
415 stop_page = NE1SM_STOP_PG;
416 }
418 #if defined(CONFIG_PLAT_MAPPI) || defined(CONFIG_PLAT_OAKS32R)
419 neX000 = ((SA_prom[14] == 0x57 && SA_prom[15] == 0x57)
420 || (SA_prom[14] == 0x42 && SA_prom[15] == 0x42));
421 #else
422 neX000 = (SA_prom[14] == 0x57 && SA_prom[15] == 0x57);
423 #endif
424 ctron = (SA_prom[0] == 0x00 && SA_prom[1] == 0x00 && SA_prom[2] == 0x1d);
425 copam = (SA_prom[14] == 0x49 && SA_prom[15] == 0x00);
427 /* Set up the rest of the parameters. */
428 if (neX000 || bad_card || copam) {
429 name = (wordlength == 2) ? "NE2000" : "NE1000";
430 }
431 else if (ctron)
432 {
433 name = (wordlength == 2) ? "Ctron-8" : "Ctron-16";
434 start_page = 0x01;
435 stop_page = (wordlength == 2) ? 0x40 : 0x20;
436 }
437 else
438 {
439 #ifdef SUPPORT_NE_BAD_CLONES
440 /* Ack! Well, there might be a *bad* NE*000 clone there.
441 Check for total bogus addresses. */
442 for (i = 0; bad_clone_list[i].name8; i++)
443 {
444 if (SA_prom[0] == bad_clone_list[i].SAprefix[0] &&
445 SA_prom[1] == bad_clone_list[i].SAprefix[1] &&
446 SA_prom[2] == bad_clone_list[i].SAprefix[2])
447 {
448 if (wordlength == 2)
449 {
450 name = bad_clone_list[i].name16;
451 } else {
452 name = bad_clone_list[i].name8;
453 }
454 break;
455 }
456 }
457 if (bad_clone_list[i].name8 == NULL)
458 {
459 printk(" not found (invalid signature %2.2x %2.2x).\n",
460 SA_prom[14], SA_prom[15]);
461 ret = -ENXIO;
462 goto err_out;
463 }
464 #else
465 printk(" not found.\n");
466 ret = -ENXIO;
467 goto err_out;
468 #endif
469 }
471 if (dev->irq < 2)
472 {
473 unsigned long cookie = probe_irq_on();
474 outb_p(0x50, ioaddr + EN0_IMR); /* Enable one interrupt. */
475 outb_p(0x00, ioaddr + EN0_RCNTLO);
476 outb_p(0x00, ioaddr + EN0_RCNTHI);
477 outb_p(E8390_RREAD+E8390_START, ioaddr); /* Trigger it... */
478 mdelay(10); /* wait 10ms for interrupt to propagate */
479 outb_p(0x00, ioaddr + EN0_IMR); /* Mask it again. */
480 dev->irq = probe_irq_off(cookie);
481 if (ei_debug > 2)
482 printk(" autoirq is %d\n", dev->irq);
483 } else if (dev->irq == 2)
484 /* Fixup for users that don't know that IRQ 2 is really IRQ 9,
485 or don't know which one to set. */
486 dev->irq = 9;
488 if (! dev->irq) {
489 printk(" failed to detect IRQ line.\n");
490 ret = -EAGAIN;
491 goto err_out;
492 }
494 /* Snarf the interrupt now. There's no point in waiting since we cannot
495 share and the board will usually be enabled. */
496 ret = request_irq(dev->irq, ei_interrupt, 0, name, dev);
497 if (ret) {
498 printk (" unable to get IRQ %d (errno=%d).\n", dev->irq, ret);
499 goto err_out;
500 }
502 dev->base_addr = ioaddr;
504 #ifdef CONFIG_PLAT_MAPPI
505 outb_p(E8390_NODMA + E8390_PAGE1 + E8390_STOP,
506 ioaddr + E8390_CMD); /* 0x61 */
507 for (i = 0 ; i < ETHER_ADDR_LEN ; i++) {
508 dev->dev_addr[i] = SA_prom[i]
509 = inb_p(ioaddr + EN1_PHYS_SHIFT(i));
510 printk(" %2.2x", SA_prom[i]);
511 }
512 #else
513 for(i = 0; i < ETHER_ADDR_LEN; i++) {
514 printk(" %2.2x", SA_prom[i]);
515 dev->dev_addr[i] = SA_prom[i];
516 }
517 #endif
519 printk("\n%s: %s found at %#x, using IRQ %d.\n",
520 dev->name, name, ioaddr, dev->irq);
522 ei_status.name = name;
523 ei_status.tx_start_page = start_page;
524 ei_status.stop_page = stop_page;
526 /* Use 16-bit mode only if this wasn't overridden by DCR_VAL */
527 ei_status.word16 = (wordlength == 2 && (DCR_VAL & 0x01));
529 ei_status.rx_start_page = start_page + TX_PAGES;
530 #ifdef PACKETBUF_MEMSIZE
531 /* Allow the packet buffer size to be overridden by know-it-alls. */
532 ei_status.stop_page = ei_status.tx_start_page + PACKETBUF_MEMSIZE;
533 #endif
535 ei_status.reset_8390 = &ne_reset_8390;
536 ei_status.block_input = &ne_block_input;
537 ei_status.block_output = &ne_block_output;
538 ei_status.get_8390_hdr = &ne_get_8390_hdr;
539 ei_status.priv = 0;
540 dev->open = &ne_open;
541 dev->stop = &ne_close;
542 #ifdef CONFIG_NET_POLL_CONTROLLER
543 dev->poll_controller = ei_poll;
544 #endif
545 NS8390_init(dev, 0);
547 ret = register_netdev(dev);
548 if (ret)
549 goto out_irq;
550 return 0;
552 out_irq:
553 free_irq(dev->irq, dev);
554 err_out:
555 release_region(ioaddr, NE_IO_EXTENT);
556 return ret;
557 }
559 static int ne_open(struct net_device *dev)
560 {
561 ei_open(dev);
562 return 0;
563 }
565 static int ne_close(struct net_device *dev)
566 {
567 if (ei_debug > 1)
568 printk(KERN_DEBUG "%s: Shutting down ethercard.\n", dev->name);
569 ei_close(dev);
570 return 0;
571 }
573 /* Hard reset the card. This used to pause for the same period that a
574 8390 reset command required, but that shouldn't be necessary. */
576 static void ne_reset_8390(struct net_device *dev)
577 {
578 unsigned long reset_start_time = jiffies;
580 if (ei_debug > 1)
581 printk(KERN_DEBUG "resetting the 8390 t=%ld...", jiffies);
583 /* DON'T change these to inb_p/outb_p or reset will fail on clones. */
584 outb(inb(NE_BASE + NE_RESET), NE_BASE + NE_RESET);
586 ei_status.txing = 0;
587 ei_status.dmaing = 0;
589 /* This check _should_not_ be necessary, omit eventually. */
590 while ((inb_p(NE_BASE+EN0_ISR) & ENISR_RESET) == 0)
591 if (time_after(jiffies, reset_start_time + 2*HZ/100)) {
592 printk(KERN_WARNING "%s: ne_reset_8390() did not complete.\n", dev->name);
593 break;
594 }
595 outb_p(ENISR_RESET, NE_BASE + EN0_ISR); /* Ack intr. */
596 }
598 /* Grab the 8390 specific header. Similar to the block_input routine, but
599 we don't need to be concerned with ring wrap as the header will be at
600 the start of a page, so we optimize accordingly. */
602 static void ne_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, int ring_page)
603 {
604 int nic_base = dev->base_addr;
606 /* This *shouldn't* happen. If it does, it's the last thing you'll see */
608 if (ei_status.dmaing)
609 {
610 printk(KERN_EMERG "%s: DMAing conflict in ne_get_8390_hdr "
611 "[DMAstat:%d][irqlock:%d].\n",
612 dev->name, ei_status.dmaing, ei_status.irqlock);
613 return;
614 }
616 ei_status.dmaing |= 0x01;
617 outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base+ NE_CMD);
618 outb_p(sizeof(struct e8390_pkt_hdr), nic_base + EN0_RCNTLO);
619 outb_p(0, nic_base + EN0_RCNTHI);
620 outb_p(0, nic_base + EN0_RSARLO); /* On page boundary */
621 outb_p(ring_page, nic_base + EN0_RSARHI);
622 outb_p(E8390_RREAD+E8390_START, nic_base + NE_CMD);
624 if (ei_status.word16)
625 insw(NE_BASE + NE_DATAPORT, hdr, sizeof(struct e8390_pkt_hdr)>>1);
626 else
627 insb(NE_BASE + NE_DATAPORT, hdr, sizeof(struct e8390_pkt_hdr));
629 outb_p(ENISR_RDC, nic_base + EN0_ISR); /* Ack intr. */
630 ei_status.dmaing &= ~0x01;
632 le16_to_cpus(&hdr->count);
633 }
635 /* Block input and output, similar to the Crynwr packet driver. If you
636 are porting to a new ethercard, look at the packet driver source for hints.
637 The NEx000 doesn't share the on-board packet memory -- you have to put
638 the packet out through the "remote DMA" dataport using outb. */
640 static void ne_block_input(struct net_device *dev, int count, struct sk_buff *skb, int ring_offset)
641 {
642 #ifdef NE_SANITY_CHECK
643 int xfer_count = count;
644 #endif
645 int nic_base = dev->base_addr;
646 char *buf = skb->data;
648 /* This *shouldn't* happen. If it does, it's the last thing you'll see */
649 if (ei_status.dmaing)
650 {
651 printk(KERN_EMERG "%s: DMAing conflict in ne_block_input "
652 "[DMAstat:%d][irqlock:%d].\n",
653 dev->name, ei_status.dmaing, ei_status.irqlock);
654 return;
655 }
656 ei_status.dmaing |= 0x01;
657 outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base+ NE_CMD);
658 outb_p(count & 0xff, nic_base + EN0_RCNTLO);
659 outb_p(count >> 8, nic_base + EN0_RCNTHI);
660 outb_p(ring_offset & 0xff, nic_base + EN0_RSARLO);
661 outb_p(ring_offset >> 8, nic_base + EN0_RSARHI);
662 outb_p(E8390_RREAD+E8390_START, nic_base + NE_CMD);
663 if (ei_status.word16)
664 {
665 insw(NE_BASE + NE_DATAPORT,buf,count>>1);
666 if (count & 0x01)
667 {
668 buf[count-1] = inb(NE_BASE + NE_DATAPORT);
669 #ifdef NE_SANITY_CHECK
670 xfer_count++;
671 #endif
672 }
673 } else {
674 insb(NE_BASE + NE_DATAPORT, buf, count);
675 }
677 #ifdef NE_SANITY_CHECK
678 /* This was for the ALPHA version only, but enough people have
679 been encountering problems so it is still here. If you see
680 this message you either 1) have a slightly incompatible clone
681 or 2) have noise/speed problems with your bus. */
683 if (ei_debug > 1)
684 {
685 /* DMA termination address check... */
686 int addr, tries = 20;
687 do {
688 /* DON'T check for 'inb_p(EN0_ISR) & ENISR_RDC' here
689 -- it's broken for Rx on some cards! */
690 int high = inb_p(nic_base + EN0_RSARHI);
691 int low = inb_p(nic_base + EN0_RSARLO);
692 addr = (high << 8) + low;
693 if (((ring_offset + xfer_count) & 0xff) == low)
694 break;
695 } while (--tries > 0);
696 if (tries <= 0)
697 printk(KERN_WARNING "%s: RX transfer address mismatch,"
698 "%#4.4x (expected) vs. %#4.4x (actual).\n",
699 dev->name, ring_offset + xfer_count, addr);
700 }
701 #endif
702 outb_p(ENISR_RDC, nic_base + EN0_ISR); /* Ack intr. */
703 ei_status.dmaing &= ~0x01;
704 }
706 static void ne_block_output(struct net_device *dev, int count,
707 const unsigned char *buf, const int start_page)
708 {
709 int nic_base = NE_BASE;
710 unsigned long dma_start;
711 #ifdef NE_SANITY_CHECK
712 int retries = 0;
713 #endif
715 /* Round the count up for word writes. Do we need to do this?
716 What effect will an odd byte count have on the 8390?
717 I should check someday. */
719 if (ei_status.word16 && (count & 0x01))
720 count++;
722 /* This *shouldn't* happen. If it does, it's the last thing you'll see */
723 if (ei_status.dmaing)
724 {
725 printk(KERN_EMERG "%s: DMAing conflict in ne_block_output."
726 "[DMAstat:%d][irqlock:%d]\n",
727 dev->name, ei_status.dmaing, ei_status.irqlock);
728 return;
729 }
730 ei_status.dmaing |= 0x01;
731 /* We should already be in page 0, but to be safe... */
732 outb_p(E8390_PAGE0+E8390_START+E8390_NODMA, nic_base + NE_CMD);
734 #ifdef NE_SANITY_CHECK
735 retry:
736 #endif
738 #ifdef NE8390_RW_BUGFIX
739 /* Handle the read-before-write bug the same way as the
740 Crynwr packet driver -- the NatSemi method doesn't work.
741 Actually this doesn't always work either, but if you have
742 problems with your NEx000 this is better than nothing! */
744 outb_p(0x42, nic_base + EN0_RCNTLO);
745 outb_p(0x00, nic_base + EN0_RCNTHI);
746 outb_p(0x42, nic_base + EN0_RSARLO);
747 outb_p(0x00, nic_base + EN0_RSARHI);
748 outb_p(E8390_RREAD+E8390_START, nic_base + NE_CMD);
749 /* Make certain that the dummy read has occurred. */
750 udelay(6);
751 #endif
753 outb_p(ENISR_RDC, nic_base + EN0_ISR);
755 /* Now the normal output. */
756 outb_p(count & 0xff, nic_base + EN0_RCNTLO);
757 outb_p(count >> 8, nic_base + EN0_RCNTHI);
758 outb_p(0x00, nic_base + EN0_RSARLO);
759 outb_p(start_page, nic_base + EN0_RSARHI);
761 outb_p(E8390_RWRITE+E8390_START, nic_base + NE_CMD);
762 if (ei_status.word16) {
763 outsw(NE_BASE + NE_DATAPORT, buf, count>>1);
764 } else {
765 outsb(NE_BASE + NE_DATAPORT, buf, count);
766 }
768 dma_start = jiffies;
770 #ifdef NE_SANITY_CHECK
771 /* This was for the ALPHA version only, but enough people have
772 been encountering problems so it is still here. */
774 if (ei_debug > 1)
775 {
776 /* DMA termination address check... */
777 int addr, tries = 20;
778 do {
779 int high = inb_p(nic_base + EN0_RSARHI);
780 int low = inb_p(nic_base + EN0_RSARLO);
781 addr = (high << 8) + low;
782 if ((start_page << 8) + count == addr)
783 break;
784 } while (--tries > 0);
786 if (tries <= 0)
787 {
788 printk(KERN_WARNING "%s: Tx packet transfer address mismatch,"
789 "%#4.4x (expected) vs. %#4.4x (actual).\n",
790 dev->name, (start_page << 8) + count, addr);
791 if (retries++ == 0)
792 goto retry;
793 }
794 }
795 #endif
797 while ((inb_p(nic_base + EN0_ISR) & ENISR_RDC) == 0)
798 if (time_after(jiffies, dma_start + 2*HZ/100)) { /* 20ms */
799 printk(KERN_WARNING "%s: timeout waiting for Tx RDC.\n", dev->name);
800 ne_reset_8390(dev);
801 NS8390_init(dev,1);
802 break;
803 }
805 outb_p(ENISR_RDC, nic_base + EN0_ISR); /* Ack intr. */
806 ei_status.dmaing &= ~0x01;
807 return;
808 }
811 #ifdef MODULE
812 #define MAX_NE_CARDS 4 /* Max number of NE cards per module */
813 static struct net_device *dev_ne[MAX_NE_CARDS];
814 static int io[MAX_NE_CARDS];
815 static int irq[MAX_NE_CARDS];
816 static int bad[MAX_NE_CARDS]; /* 0xbad = bad sig or no reset ack */
818 module_param_array(io, int, NULL, 0);
819 module_param_array(irq, int, NULL, 0);
820 module_param_array(bad, int, NULL, 0);
821 MODULE_PARM_DESC(io, "I/O base address(es),required");
822 MODULE_PARM_DESC(irq, "IRQ number(s)");
823 MODULE_PARM_DESC(bad, "Accept card(s) with bad signatures");
824 MODULE_DESCRIPTION("NE1000/NE2000 ISA/PnP Ethernet driver");
825 MODULE_LICENSE("GPL");
827 /* This is set up so that no ISA autoprobe takes place. We can't guarantee
828 that the ne2k probe is the last 8390 based probe to take place (as it
829 is at boot) and so the probe will get confused by any other 8390 cards.
830 ISA device autoprobes on a running machine are not recommended anyway. */
832 int __init init_module(void)
833 {
834 int this_dev, found = 0;
836 for (this_dev = 0; this_dev < MAX_NE_CARDS; this_dev++) {
837 struct net_device *dev = alloc_ei_netdev();
838 if (!dev)
839 break;
840 dev->irq = irq[this_dev];
841 dev->mem_end = bad[this_dev];
842 dev->base_addr = io[this_dev];
843 if (do_ne_probe(dev) == 0) {
844 dev_ne[found++] = dev;
845 continue;
846 }
847 free_netdev(dev);
848 if (found)
849 break;
850 if (io[this_dev] != 0)
851 printk(KERN_WARNING "ne.c: No NE*000 card found at i/o = %#x\n", io[this_dev]);
852 else
853 printk(KERN_NOTICE "ne.c: You must supply \"io=0xNNN\" value(s) for ISA cards.\n");
854 return -ENXIO;
855 }
856 if (found)
857 return 0;
858 return -ENODEV;
859 }
861 static void cleanup_card(struct net_device *dev)
862 {
863 struct pnp_dev *idev = (struct pnp_dev *)ei_status.priv;
864 if (idev)
865 pnp_device_detach(idev);
866 free_irq(dev->irq, dev);
867 release_region(dev->base_addr, NE_IO_EXTENT);
868 }
870 void cleanup_module(void)
871 {
872 int this_dev;
874 for (this_dev = 0; this_dev < MAX_NE_CARDS; this_dev++) {
875 struct net_device *dev = dev_ne[this_dev];
876 if (dev) {
877 unregister_netdev(dev);
878 cleanup_card(dev);
879 free_netdev(dev);
880 }
881 }
882 }
883 #endif /* MODULE */