ia64/linux-2.6.18-xen.hg

view drivers/net/ne2k-pci.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 /* ne2k-pci.c: A NE2000 clone on PCI bus driver for Linux. */
2 /*
3 A Linux device driver for PCI NE2000 clones.
5 Authors and other copyright holders:
6 1992-2000 by Donald Becker, NE2000 core and various modifications.
7 1995-1998 by Paul Gortmaker, core modifications and PCI support.
8 Copyright 1993 assigned to the United States Government as represented
9 by the Director, National Security Agency.
11 This software may be used and distributed according to the terms of
12 the GNU General Public License (GPL), incorporated herein by reference.
13 Drivers based on or derived from this code fall under the GPL and must
14 retain the authorship, copyright and license notice. This file is not
15 a complete program and may only be used when the entire operating
16 system is licensed under the GPL.
18 The author may be reached as becker@scyld.com, or C/O
19 Scyld Computing Corporation
20 410 Severn Ave., Suite 210
21 Annapolis MD 21403
23 Issues remaining:
24 People are making PCI ne2000 clones! Oh the horror, the horror...
25 Limited full-duplex support.
26 */
28 #define DRV_NAME "ne2k-pci"
29 #define DRV_VERSION "1.03"
30 #define DRV_RELDATE "9/22/2003"
33 /* The user-configurable values.
34 These may be modified when a driver module is loaded.*/
36 static int debug = 1; /* 1 normal messages, 0 quiet .. 7 verbose. */
38 #define MAX_UNITS 8 /* More are supported, limit only on options */
39 /* Used to pass the full-duplex flag, etc. */
40 static int full_duplex[MAX_UNITS];
41 static int options[MAX_UNITS];
43 /* Force a non std. amount of memory. Units are 256 byte pages. */
44 /* #define PACKETBUF_MEMSIZE 0x40 */
47 #include <linux/module.h>
48 #include <linux/kernel.h>
49 #include <linux/errno.h>
50 #include <linux/pci.h>
51 #include <linux/init.h>
52 #include <linux/interrupt.h>
53 #include <linux/ethtool.h>
54 #include <linux/netdevice.h>
55 #include <linux/etherdevice.h>
57 #include <asm/system.h>
58 #include <asm/io.h>
59 #include <asm/irq.h>
60 #include <asm/uaccess.h>
62 #include "8390.h"
64 /* These identify the driver base version and may not be removed. */
65 static char version[] __devinitdata =
66 KERN_INFO DRV_NAME ".c:v" DRV_VERSION " " DRV_RELDATE " D. Becker/P. Gortmaker\n"
67 KERN_INFO " http://www.scyld.com/network/ne2k-pci.html\n";
69 #if defined(__powerpc__)
70 #define inl_le(addr) le32_to_cpu(inl(addr))
71 #define inw_le(addr) le16_to_cpu(inw(addr))
72 #endif
74 #define PFX DRV_NAME ": "
76 MODULE_AUTHOR("Donald Becker / Paul Gortmaker");
77 MODULE_DESCRIPTION("PCI NE2000 clone driver");
78 MODULE_LICENSE("GPL");
80 module_param(debug, int, 0);
81 module_param_array(options, int, NULL, 0);
82 module_param_array(full_duplex, int, NULL, 0);
83 MODULE_PARM_DESC(debug, "debug level (1-2)");
84 MODULE_PARM_DESC(options, "Bit 5: full duplex");
85 MODULE_PARM_DESC(full_duplex, "full duplex setting(s) (1)");
87 /* Some defines that people can play with if so inclined. */
89 /* Use 32 bit data-movement operations instead of 16 bit. */
90 #define USE_LONGIO
92 /* Do we implement the read before write bugfix ? */
93 /* #define NE_RW_BUGFIX */
95 /* Flags. We rename an existing ei_status field to store flags! */
96 /* Thus only the low 8 bits are usable for non-init-time flags. */
97 #define ne2k_flags reg0
98 enum {
99 ONLY_16BIT_IO=8, ONLY_32BIT_IO=4, /* Chip can do only 16/32-bit xfers. */
100 FORCE_FDX=0x20, /* User override. */
101 REALTEK_FDX=0x40, HOLTEK_FDX=0x80,
102 STOP_PG_0x60=0x100,
103 };
105 enum ne2k_pci_chipsets {
106 CH_RealTek_RTL_8029 = 0,
107 CH_Winbond_89C940,
108 CH_Compex_RL2000,
109 CH_KTI_ET32P2,
110 CH_NetVin_NV5000SC,
111 CH_Via_86C926,
112 CH_SureCom_NE34,
113 CH_Winbond_W89C940F,
114 CH_Holtek_HT80232,
115 CH_Holtek_HT80229,
116 CH_Winbond_89C940_8c4a,
117 };
120 static struct {
121 char *name;
122 int flags;
123 } pci_clone_list[] __devinitdata = {
124 {"RealTek RTL-8029", REALTEK_FDX},
125 {"Winbond 89C940", 0},
126 {"Compex RL2000", 0},
127 {"KTI ET32P2", 0},
128 {"NetVin NV5000SC", 0},
129 {"Via 86C926", ONLY_16BIT_IO},
130 {"SureCom NE34", 0},
131 {"Winbond W89C940F", 0},
132 {"Holtek HT80232", ONLY_16BIT_IO | HOLTEK_FDX},
133 {"Holtek HT80229", ONLY_32BIT_IO | HOLTEK_FDX | STOP_PG_0x60 },
134 {"Winbond W89C940(misprogrammed)", 0},
135 {NULL,}
136 };
139 static struct pci_device_id ne2k_pci_tbl[] = {
140 { 0x10ec, 0x8029, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CH_RealTek_RTL_8029 },
141 { 0x1050, 0x0940, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CH_Winbond_89C940 },
142 { 0x11f6, 0x1401, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CH_Compex_RL2000 },
143 { 0x8e2e, 0x3000, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CH_KTI_ET32P2 },
144 { 0x4a14, 0x5000, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CH_NetVin_NV5000SC },
145 { 0x1106, 0x0926, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CH_Via_86C926 },
146 { 0x10bd, 0x0e34, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CH_SureCom_NE34 },
147 { 0x1050, 0x5a5a, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CH_Winbond_W89C940F },
148 { 0x12c3, 0x0058, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CH_Holtek_HT80232 },
149 { 0x12c3, 0x5598, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CH_Holtek_HT80229 },
150 { 0x8c4a, 0x1980, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CH_Winbond_89C940_8c4a },
151 { 0, }
152 };
153 MODULE_DEVICE_TABLE(pci, ne2k_pci_tbl);
156 /* ---- No user-serviceable parts below ---- */
158 #define NE_BASE (dev->base_addr)
159 #define NE_CMD 0x00
160 #define NE_DATAPORT 0x10 /* NatSemi-defined port window offset. */
161 #define NE_RESET 0x1f /* Issue a read to reset, a write to clear. */
162 #define NE_IO_EXTENT 0x20
164 #define NESM_START_PG 0x40 /* First page of TX buffer */
165 #define NESM_STOP_PG 0x80 /* Last page +1 of RX ring */
168 static int ne2k_pci_open(struct net_device *dev);
169 static int ne2k_pci_close(struct net_device *dev);
171 static void ne2k_pci_reset_8390(struct net_device *dev);
172 static void ne2k_pci_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr,
173 int ring_page);
174 static void ne2k_pci_block_input(struct net_device *dev, int count,
175 struct sk_buff *skb, int ring_offset);
176 static void ne2k_pci_block_output(struct net_device *dev, const int count,
177 const unsigned char *buf, const int start_page);
178 static struct ethtool_ops ne2k_pci_ethtool_ops;
182 /* There is no room in the standard 8390 structure for extra info we need,
183 so we build a meta/outer-wrapper structure.. */
184 struct ne2k_pci_card {
185 struct net_device *dev;
186 struct pci_dev *pci_dev;
187 };
191 /*
192 NEx000-clone boards have a Station Address (SA) PROM (SAPROM) in the packet
193 buffer memory space. By-the-spec NE2000 clones have 0x57,0x57 in bytes
194 0x0e,0x0f of the SAPROM, while other supposed NE2000 clones must be
195 detected by their SA prefix.
197 Reading the SAPROM from a word-wide card with the 8390 set in byte-wide
198 mode results in doubled values, which can be detected and compensated for.
200 The probe is also responsible for initializing the card and filling
201 in the 'dev' and 'ei_status' structures.
202 */
205 static int __devinit ne2k_pci_init_one (struct pci_dev *pdev,
206 const struct pci_device_id *ent)
207 {
208 struct net_device *dev;
209 int i;
210 unsigned char SA_prom[32];
211 int start_page, stop_page;
212 int irq, reg0, chip_idx = ent->driver_data;
213 static unsigned int fnd_cnt;
214 long ioaddr;
215 int flags = pci_clone_list[chip_idx].flags;
217 /* when built into the kernel, we only print version if device is found */
218 #ifndef MODULE
219 static int printed_version;
220 if (!printed_version++)
221 printk(version);
222 #endif
224 fnd_cnt++;
226 i = pci_enable_device (pdev);
227 if (i)
228 return i;
230 ioaddr = pci_resource_start (pdev, 0);
231 irq = pdev->irq;
233 if (!ioaddr || ((pci_resource_flags (pdev, 0) & IORESOURCE_IO) == 0)) {
234 dev_err(&pdev->dev, "no I/O resource at PCI BAR #0\n");
235 return -ENODEV;
236 }
238 if (request_region (ioaddr, NE_IO_EXTENT, DRV_NAME) == NULL) {
239 dev_err(&pdev->dev, "I/O resource 0x%x @ 0x%lx busy\n",
240 NE_IO_EXTENT, ioaddr);
241 return -EBUSY;
242 }
244 reg0 = inb(ioaddr);
245 if (reg0 == 0xFF)
246 goto err_out_free_res;
248 /* Do a preliminary verification that we have a 8390. */
249 {
250 int regd;
251 outb(E8390_NODMA+E8390_PAGE1+E8390_STOP, ioaddr + E8390_CMD);
252 regd = inb(ioaddr + 0x0d);
253 outb(0xff, ioaddr + 0x0d);
254 outb(E8390_NODMA+E8390_PAGE0, ioaddr + E8390_CMD);
255 inb(ioaddr + EN0_COUNTER0); /* Clear the counter by reading. */
256 if (inb(ioaddr + EN0_COUNTER0) != 0) {
257 outb(reg0, ioaddr);
258 outb(regd, ioaddr + 0x0d); /* Restore the old values. */
259 goto err_out_free_res;
260 }
261 }
263 /* Allocate net_device, dev->priv; fill in 8390 specific dev fields. */
264 dev = alloc_ei_netdev();
265 if (!dev) {
266 dev_err(&pdev->dev, "cannot allocate ethernet device\n");
267 goto err_out_free_res;
268 }
269 SET_MODULE_OWNER(dev);
270 SET_NETDEV_DEV(dev, &pdev->dev);
272 /* Reset card. Who knows what dain-bramaged state it was left in. */
273 {
274 unsigned long reset_start_time = jiffies;
276 outb(inb(ioaddr + NE_RESET), ioaddr + NE_RESET);
278 /* This looks like a horrible timing loop, but it should never take
279 more than a few cycles.
280 */
281 while ((inb(ioaddr + EN0_ISR) & ENISR_RESET) == 0)
282 /* Limit wait: '2' avoids jiffy roll-over. */
283 if (jiffies - reset_start_time > 2) {
284 dev_err(&pdev->dev,
285 "Card failure (no reset ack).\n");
286 goto err_out_free_netdev;
287 }
289 outb(0xff, ioaddr + EN0_ISR); /* Ack all intr. */
290 }
292 /* Read the 16 bytes of station address PROM.
293 We must first initialize registers, similar to NS8390_init(eifdev, 0).
294 We can't reliably read the SAPROM address without this.
295 (I learned the hard way!). */
296 {
297 struct {unsigned char value, offset; } program_seq[] = {
298 {E8390_NODMA+E8390_PAGE0+E8390_STOP, E8390_CMD}, /* Select page 0*/
299 {0x49, EN0_DCFG}, /* Set word-wide access. */
300 {0x00, EN0_RCNTLO}, /* Clear the count regs. */
301 {0x00, EN0_RCNTHI},
302 {0x00, EN0_IMR}, /* Mask completion irq. */
303 {0xFF, EN0_ISR},
304 {E8390_RXOFF, EN0_RXCR}, /* 0x20 Set to monitor */
305 {E8390_TXOFF, EN0_TXCR}, /* 0x02 and loopback mode. */
306 {32, EN0_RCNTLO},
307 {0x00, EN0_RCNTHI},
308 {0x00, EN0_RSARLO}, /* DMA starting at 0x0000. */
309 {0x00, EN0_RSARHI},
310 {E8390_RREAD+E8390_START, E8390_CMD},
311 };
312 for (i = 0; i < sizeof(program_seq)/sizeof(program_seq[0]); i++)
313 outb(program_seq[i].value, ioaddr + program_seq[i].offset);
315 }
317 /* Note: all PCI cards have at least 16 bit access, so we don't have
318 to check for 8 bit cards. Most cards permit 32 bit access. */
319 if (flags & ONLY_32BIT_IO) {
320 for (i = 0; i < 4 ; i++)
321 ((u32 *)SA_prom)[i] = le32_to_cpu(inl(ioaddr + NE_DATAPORT));
322 } else
323 for(i = 0; i < 32 /*sizeof(SA_prom)*/; i++)
324 SA_prom[i] = inb(ioaddr + NE_DATAPORT);
326 /* We always set the 8390 registers for word mode. */
327 outb(0x49, ioaddr + EN0_DCFG);
328 start_page = NESM_START_PG;
330 stop_page = flags & STOP_PG_0x60 ? 0x60 : NESM_STOP_PG;
332 /* Set up the rest of the parameters. */
333 dev->irq = irq;
334 dev->base_addr = ioaddr;
335 pci_set_drvdata(pdev, dev);
337 ei_status.name = pci_clone_list[chip_idx].name;
338 ei_status.tx_start_page = start_page;
339 ei_status.stop_page = stop_page;
340 ei_status.word16 = 1;
341 ei_status.ne2k_flags = flags;
342 if (fnd_cnt < MAX_UNITS) {
343 if (full_duplex[fnd_cnt] > 0 || (options[fnd_cnt] & FORCE_FDX))
344 ei_status.ne2k_flags |= FORCE_FDX;
345 }
347 ei_status.rx_start_page = start_page + TX_PAGES;
348 #ifdef PACKETBUF_MEMSIZE
349 /* Allow the packet buffer size to be overridden by know-it-alls. */
350 ei_status.stop_page = ei_status.tx_start_page + PACKETBUF_MEMSIZE;
351 #endif
353 ei_status.reset_8390 = &ne2k_pci_reset_8390;
354 ei_status.block_input = &ne2k_pci_block_input;
355 ei_status.block_output = &ne2k_pci_block_output;
356 ei_status.get_8390_hdr = &ne2k_pci_get_8390_hdr;
357 ei_status.priv = (unsigned long) pdev;
358 dev->open = &ne2k_pci_open;
359 dev->stop = &ne2k_pci_close;
360 dev->ethtool_ops = &ne2k_pci_ethtool_ops;
361 #ifdef CONFIG_NET_POLL_CONTROLLER
362 dev->poll_controller = ei_poll;
363 #endif
364 NS8390_init(dev, 0);
366 i = register_netdev(dev);
367 if (i)
368 goto err_out_free_netdev;
370 printk("%s: %s found at %#lx, IRQ %d, ",
371 dev->name, pci_clone_list[chip_idx].name, ioaddr, dev->irq);
372 for(i = 0; i < 6; i++) {
373 printk("%2.2X%s", SA_prom[i], i == 5 ? ".\n": ":");
374 dev->dev_addr[i] = SA_prom[i];
375 }
376 memcpy(dev->perm_addr, dev->dev_addr, dev->addr_len);
378 return 0;
380 err_out_free_netdev:
381 free_netdev (dev);
382 err_out_free_res:
383 release_region (ioaddr, NE_IO_EXTENT);
384 pci_set_drvdata (pdev, NULL);
385 return -ENODEV;
387 }
389 /*
390 * Magic incantation sequence for full duplex on the supported cards.
391 */
392 static inline int set_realtek_fdx(struct net_device *dev)
393 {
394 long ioaddr = dev->base_addr;
396 outb(0xC0 + E8390_NODMA, ioaddr + NE_CMD); /* Page 3 */
397 outb(0xC0, ioaddr + 0x01); /* Enable writes to CONFIG3 */
398 outb(0x40, ioaddr + 0x06); /* Enable full duplex */
399 outb(0x00, ioaddr + 0x01); /* Disable writes to CONFIG3 */
400 outb(E8390_PAGE0 + E8390_NODMA, ioaddr + NE_CMD); /* Page 0 */
401 return 0;
402 }
404 static inline int set_holtek_fdx(struct net_device *dev)
405 {
406 long ioaddr = dev->base_addr;
408 outb(inb(ioaddr + 0x20) | 0x80, ioaddr + 0x20);
409 return 0;
410 }
412 static int ne2k_pci_set_fdx(struct net_device *dev)
413 {
414 if (ei_status.ne2k_flags & REALTEK_FDX)
415 return set_realtek_fdx(dev);
416 else if (ei_status.ne2k_flags & HOLTEK_FDX)
417 return set_holtek_fdx(dev);
419 return -EOPNOTSUPP;
420 }
422 static int ne2k_pci_open(struct net_device *dev)
423 {
424 int ret = request_irq(dev->irq, ei_interrupt, IRQF_SHARED, dev->name, dev);
425 if (ret)
426 return ret;
428 if (ei_status.ne2k_flags & FORCE_FDX)
429 ne2k_pci_set_fdx(dev);
431 ei_open(dev);
432 return 0;
433 }
435 static int ne2k_pci_close(struct net_device *dev)
436 {
437 ei_close(dev);
438 free_irq(dev->irq, dev);
439 return 0;
440 }
442 /* Hard reset the card. This used to pause for the same period that a
443 8390 reset command required, but that shouldn't be necessary. */
444 static void ne2k_pci_reset_8390(struct net_device *dev)
445 {
446 unsigned long reset_start_time = jiffies;
448 if (debug > 1) printk("%s: Resetting the 8390 t=%ld...",
449 dev->name, jiffies);
451 outb(inb(NE_BASE + NE_RESET), NE_BASE + NE_RESET);
453 ei_status.txing = 0;
454 ei_status.dmaing = 0;
456 /* This check _should_not_ be necessary, omit eventually. */
457 while ((inb(NE_BASE+EN0_ISR) & ENISR_RESET) == 0)
458 if (jiffies - reset_start_time > 2) {
459 printk("%s: ne2k_pci_reset_8390() did not complete.\n", dev->name);
460 break;
461 }
462 outb(ENISR_RESET, NE_BASE + EN0_ISR); /* Ack intr. */
463 }
465 /* Grab the 8390 specific header. Similar to the block_input routine, but
466 we don't need to be concerned with ring wrap as the header will be at
467 the start of a page, so we optimize accordingly. */
469 static void ne2k_pci_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, int ring_page)
470 {
472 long nic_base = dev->base_addr;
474 /* This *shouldn't* happen. If it does, it's the last thing you'll see */
475 if (ei_status.dmaing) {
476 printk("%s: DMAing conflict in ne2k_pci_get_8390_hdr "
477 "[DMAstat:%d][irqlock:%d].\n",
478 dev->name, ei_status.dmaing, ei_status.irqlock);
479 return;
480 }
482 ei_status.dmaing |= 0x01;
483 outb(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base+ NE_CMD);
484 outb(sizeof(struct e8390_pkt_hdr), nic_base + EN0_RCNTLO);
485 outb(0, nic_base + EN0_RCNTHI);
486 outb(0, nic_base + EN0_RSARLO); /* On page boundary */
487 outb(ring_page, nic_base + EN0_RSARHI);
488 outb(E8390_RREAD+E8390_START, nic_base + NE_CMD);
490 if (ei_status.ne2k_flags & ONLY_16BIT_IO) {
491 insw(NE_BASE + NE_DATAPORT, hdr, sizeof(struct e8390_pkt_hdr)>>1);
492 } else {
493 *(u32*)hdr = le32_to_cpu(inl(NE_BASE + NE_DATAPORT));
494 le16_to_cpus(&hdr->count);
495 }
497 outb(ENISR_RDC, nic_base + EN0_ISR); /* Ack intr. */
498 ei_status.dmaing &= ~0x01;
499 }
501 /* Block input and output, similar to the Crynwr packet driver. If you
502 are porting to a new ethercard, look at the packet driver source for hints.
503 The NEx000 doesn't share the on-board packet memory -- you have to put
504 the packet out through the "remote DMA" dataport using outb. */
506 static void ne2k_pci_block_input(struct net_device *dev, int count,
507 struct sk_buff *skb, int ring_offset)
508 {
509 long nic_base = dev->base_addr;
510 char *buf = skb->data;
512 /* This *shouldn't* happen. If it does, it's the last thing you'll see */
513 if (ei_status.dmaing) {
514 printk("%s: DMAing conflict in ne2k_pci_block_input "
515 "[DMAstat:%d][irqlock:%d].\n",
516 dev->name, ei_status.dmaing, ei_status.irqlock);
517 return;
518 }
519 ei_status.dmaing |= 0x01;
520 if (ei_status.ne2k_flags & ONLY_32BIT_IO)
521 count = (count + 3) & 0xFFFC;
522 outb(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base+ NE_CMD);
523 outb(count & 0xff, nic_base + EN0_RCNTLO);
524 outb(count >> 8, nic_base + EN0_RCNTHI);
525 outb(ring_offset & 0xff, nic_base + EN0_RSARLO);
526 outb(ring_offset >> 8, nic_base + EN0_RSARHI);
527 outb(E8390_RREAD+E8390_START, nic_base + NE_CMD);
529 if (ei_status.ne2k_flags & ONLY_16BIT_IO) {
530 insw(NE_BASE + NE_DATAPORT,buf,count>>1);
531 if (count & 0x01) {
532 buf[count-1] = inb(NE_BASE + NE_DATAPORT);
533 }
534 } else {
535 insl(NE_BASE + NE_DATAPORT, buf, count>>2);
536 if (count & 3) {
537 buf += count & ~3;
538 if (count & 2) {
539 u16 *b = (u16 *)buf;
541 *b++ = le16_to_cpu(inw(NE_BASE + NE_DATAPORT));
542 buf = (char *)b;
543 }
544 if (count & 1)
545 *buf = inb(NE_BASE + NE_DATAPORT);
546 }
547 }
549 outb(ENISR_RDC, nic_base + EN0_ISR); /* Ack intr. */
550 ei_status.dmaing &= ~0x01;
551 }
553 static void ne2k_pci_block_output(struct net_device *dev, int count,
554 const unsigned char *buf, const int start_page)
555 {
556 long nic_base = NE_BASE;
557 unsigned long dma_start;
559 /* On little-endian it's always safe to round the count up for
560 word writes. */
561 if (ei_status.ne2k_flags & ONLY_32BIT_IO)
562 count = (count + 3) & 0xFFFC;
563 else
564 if (count & 0x01)
565 count++;
567 /* This *shouldn't* happen. If it does, it's the last thing you'll see */
568 if (ei_status.dmaing) {
569 printk("%s: DMAing conflict in ne2k_pci_block_output."
570 "[DMAstat:%d][irqlock:%d]\n",
571 dev->name, ei_status.dmaing, ei_status.irqlock);
572 return;
573 }
574 ei_status.dmaing |= 0x01;
575 /* We should already be in page 0, but to be safe... */
576 outb(E8390_PAGE0+E8390_START+E8390_NODMA, nic_base + NE_CMD);
578 #ifdef NE8390_RW_BUGFIX
579 /* Handle the read-before-write bug the same way as the
580 Crynwr packet driver -- the NatSemi method doesn't work.
581 Actually this doesn't always work either, but if you have
582 problems with your NEx000 this is better than nothing! */
583 outb(0x42, nic_base + EN0_RCNTLO);
584 outb(0x00, nic_base + EN0_RCNTHI);
585 outb(0x42, nic_base + EN0_RSARLO);
586 outb(0x00, nic_base + EN0_RSARHI);
587 outb(E8390_RREAD+E8390_START, nic_base + NE_CMD);
588 #endif
589 outb(ENISR_RDC, nic_base + EN0_ISR);
591 /* Now the normal output. */
592 outb(count & 0xff, nic_base + EN0_RCNTLO);
593 outb(count >> 8, nic_base + EN0_RCNTHI);
594 outb(0x00, nic_base + EN0_RSARLO);
595 outb(start_page, nic_base + EN0_RSARHI);
596 outb(E8390_RWRITE+E8390_START, nic_base + NE_CMD);
597 if (ei_status.ne2k_flags & ONLY_16BIT_IO) {
598 outsw(NE_BASE + NE_DATAPORT, buf, count>>1);
599 } else {
600 outsl(NE_BASE + NE_DATAPORT, buf, count>>2);
601 if (count & 3) {
602 buf += count & ~3;
603 if (count & 2) {
604 u16 *b = (u16 *)buf;
606 outw(cpu_to_le16(*b++), NE_BASE + NE_DATAPORT);
607 buf = (char *)b;
608 }
609 }
610 }
612 dma_start = jiffies;
614 while ((inb(nic_base + EN0_ISR) & ENISR_RDC) == 0)
615 if (jiffies - dma_start > 2) { /* Avoid clock roll-over. */
616 printk(KERN_WARNING "%s: timeout waiting for Tx RDC.\n", dev->name);
617 ne2k_pci_reset_8390(dev);
618 NS8390_init(dev,1);
619 break;
620 }
622 outb(ENISR_RDC, nic_base + EN0_ISR); /* Ack intr. */
623 ei_status.dmaing &= ~0x01;
624 return;
625 }
627 static void ne2k_pci_get_drvinfo(struct net_device *dev,
628 struct ethtool_drvinfo *info)
629 {
630 struct ei_device *ei = dev->priv;
631 struct pci_dev *pci_dev = (struct pci_dev *) ei->priv;
633 strcpy(info->driver, DRV_NAME);
634 strcpy(info->version, DRV_VERSION);
635 strcpy(info->bus_info, pci_name(pci_dev));
636 }
638 static struct ethtool_ops ne2k_pci_ethtool_ops = {
639 .get_drvinfo = ne2k_pci_get_drvinfo,
640 .get_tx_csum = ethtool_op_get_tx_csum,
641 .get_sg = ethtool_op_get_sg,
642 .get_perm_addr = ethtool_op_get_perm_addr,
643 };
645 static void __devexit ne2k_pci_remove_one (struct pci_dev *pdev)
646 {
647 struct net_device *dev = pci_get_drvdata(pdev);
649 BUG_ON(!dev);
650 unregister_netdev(dev);
651 release_region(dev->base_addr, NE_IO_EXTENT);
652 free_netdev(dev);
653 pci_disable_device(pdev);
654 pci_set_drvdata(pdev, NULL);
655 }
657 #ifdef CONFIG_PM
658 static int ne2k_pci_suspend (struct pci_dev *pdev, pm_message_t state)
659 {
660 struct net_device *dev = pci_get_drvdata (pdev);
662 netif_device_detach(dev);
663 pci_save_state(pdev);
664 pci_disable_device(pdev);
665 pci_set_power_state(pdev, pci_choose_state(pdev, state));
667 return 0;
668 }
670 static int ne2k_pci_resume (struct pci_dev *pdev)
671 {
672 struct net_device *dev = pci_get_drvdata (pdev);
674 pci_set_power_state(pdev, 0);
675 pci_restore_state(pdev);
676 pci_enable_device(pdev);
677 NS8390_init(dev, 1);
678 netif_device_attach(dev);
680 return 0;
681 }
683 #endif /* CONFIG_PM */
686 static struct pci_driver ne2k_driver = {
687 .name = DRV_NAME,
688 .probe = ne2k_pci_init_one,
689 .remove = __devexit_p(ne2k_pci_remove_one),
690 .id_table = ne2k_pci_tbl,
691 #ifdef CONFIG_PM
692 .suspend = ne2k_pci_suspend,
693 .resume = ne2k_pci_resume,
694 #endif /* CONFIG_PM */
696 };
699 static int __init ne2k_pci_init(void)
700 {
701 /* when a module, this is printed whether or not devices are found in probe */
702 #ifdef MODULE
703 printk(version);
704 #endif
705 return pci_module_init (&ne2k_driver);
706 }
709 static void __exit ne2k_pci_cleanup(void)
710 {
711 pci_unregister_driver (&ne2k_driver);
712 }
714 module_init(ne2k_pci_init);
715 module_exit(ne2k_pci_cleanup);