ia64/linux-2.6.18-xen.hg

view drivers/net/seeq8005.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 /* seeq8005.c: A network driver for linux. */
2 /*
3 Based on skeleton.c,
4 Written 1993-94 by Donald Becker.
5 See the skeleton.c file for further copyright information.
7 This software may be used and distributed according to the terms
8 of the GNU General Public License, incorporated herein by reference.
10 The author may be reached as hamish@zot.apana.org.au
12 This file is a network device driver for the SEEQ 8005 chipset and
13 the Linux operating system.
15 */
17 static const char version[] =
18 "seeq8005.c:v1.00 8/07/95 Hamish Coleman (hamish@zot.apana.org.au)\n";
20 /*
21 Sources:
22 SEEQ 8005 databook
24 Version history:
25 1.00 Public release. cosmetic changes (no warnings now)
26 0.68 Turning per- packet,interrupt debug messages off - testing for release.
27 0.67 timing problems/bad buffer reads seem to be fixed now
28 0.63 *!@$ protocol=eth_type_trans -- now packets flow
29 0.56 Send working
30 0.48 Receive working
31 */
33 #include <linux/module.h>
34 #include <linux/kernel.h>
35 #include <linux/types.h>
36 #include <linux/fcntl.h>
37 #include <linux/interrupt.h>
38 #include <linux/ioport.h>
39 #include <linux/in.h>
40 #include <linux/slab.h>
41 #include <linux/string.h>
42 #include <linux/init.h>
43 #include <linux/delay.h>
44 #include <linux/errno.h>
45 #include <linux/netdevice.h>
46 #include <linux/etherdevice.h>
47 #include <linux/skbuff.h>
48 #include <linux/bitops.h>
49 #include <linux/jiffies.h>
51 #include <asm/system.h>
52 #include <asm/io.h>
53 #include <asm/dma.h>
55 #include "seeq8005.h"
57 /* First, a few definitions that the brave might change. */
58 /* A zero-terminated list of I/O addresses to be probed. */
59 static unsigned int seeq8005_portlist[] __initdata =
60 { 0x300, 0x320, 0x340, 0x360, 0};
62 /* use 0 for production, 1 for verification, >2 for debug */
63 #ifndef NET_DEBUG
64 #define NET_DEBUG 1
65 #endif
66 static unsigned int net_debug = NET_DEBUG;
68 /* Information that need to be kept for each board. */
69 struct net_local {
70 struct net_device_stats stats;
71 unsigned short receive_ptr; /* What address in packet memory do we expect a recv_pkt_header? */
72 long open_time; /* Useless example local info. */
73 };
75 /* The station (ethernet) address prefix, used for IDing the board. */
76 #define SA_ADDR0 0x00
77 #define SA_ADDR1 0x80
78 #define SA_ADDR2 0x4b
80 /* Index to functions, as function prototypes. */
82 static int seeq8005_probe1(struct net_device *dev, int ioaddr);
83 static int seeq8005_open(struct net_device *dev);
84 static void seeq8005_timeout(struct net_device *dev);
85 static int seeq8005_send_packet(struct sk_buff *skb, struct net_device *dev);
86 static irqreturn_t seeq8005_interrupt(int irq, void *dev_id, struct pt_regs *regs);
87 static void seeq8005_rx(struct net_device *dev);
88 static int seeq8005_close(struct net_device *dev);
89 static struct net_device_stats *seeq8005_get_stats(struct net_device *dev);
90 static void set_multicast_list(struct net_device *dev);
92 /* Example routines you must write ;->. */
93 #define tx_done(dev) (inw(SEEQ_STATUS) & SEEQSTAT_TX_ON)
94 static void hardware_send_packet(struct net_device *dev, char *buf, int length);
95 extern void seeq8005_init(struct net_device *dev, int startp);
96 static inline void wait_for_buffer(struct net_device *dev);
99 /* Check for a network adaptor of this type, and return '0' iff one exists.
100 If dev->base_addr == 0, probe all likely locations.
101 If dev->base_addr == 1, always return failure.
102 */
104 static int io = 0x320;
105 static int irq = 10;
107 struct net_device * __init seeq8005_probe(int unit)
108 {
109 struct net_device *dev = alloc_etherdev(sizeof(struct net_local));
110 unsigned *port;
111 int err = 0;
113 if (!dev)
114 return ERR_PTR(-ENODEV);
116 if (unit >= 0) {
117 sprintf(dev->name, "eth%d", unit);
118 netdev_boot_setup_check(dev);
119 io = dev->base_addr;
120 irq = dev->irq;
121 }
123 if (io > 0x1ff) { /* Check a single specified location. */
124 err = seeq8005_probe1(dev, io);
125 } else if (io != 0) { /* Don't probe at all. */
126 err = -ENXIO;
127 } else {
128 for (port = seeq8005_portlist; *port; port++) {
129 if (seeq8005_probe1(dev, *port) == 0)
130 break;
131 }
132 if (!*port)
133 err = -ENODEV;
134 }
135 if (err)
136 goto out;
137 err = register_netdev(dev);
138 if (err)
139 goto out1;
140 return dev;
141 out1:
142 release_region(dev->base_addr, SEEQ8005_IO_EXTENT);
143 out:
144 free_netdev(dev);
145 return ERR_PTR(err);
146 }
148 /* This is the real probe routine. Linux has a history of friendly device
149 probes on the ISA bus. A good device probes avoids doing writes, and
150 verifies that the correct device exists and functions. */
152 static int __init seeq8005_probe1(struct net_device *dev, int ioaddr)
153 {
154 static unsigned version_printed;
155 int i,j;
156 unsigned char SA_prom[32];
157 int old_cfg1;
158 int old_cfg2;
159 int old_stat;
160 int old_dmaar;
161 int old_rear;
162 int retval;
164 if (!request_region(ioaddr, SEEQ8005_IO_EXTENT, "seeq8005"))
165 return -ENODEV;
167 if (net_debug>1)
168 printk("seeq8005: probing at 0x%x\n",ioaddr);
170 old_stat = inw(SEEQ_STATUS); /* read status register */
171 if (old_stat == 0xffff) {
172 retval = -ENODEV;
173 goto out; /* assume that 0xffff == no device */
174 }
175 if ( (old_stat & 0x1800) != 0x1800 ) { /* assume that unused bits are 1, as my manual says */
176 if (net_debug>1) {
177 printk("seeq8005: reserved stat bits != 0x1800\n");
178 printk(" == 0x%04x\n",old_stat);
179 }
180 retval = -ENODEV;
181 goto out;
182 }
184 old_rear = inw(SEEQ_REA);
185 if (old_rear == 0xffff) {
186 outw(0,SEEQ_REA);
187 if (inw(SEEQ_REA) == 0xffff) { /* assume that 0xffff == no device */
188 retval = -ENODEV;
189 goto out;
190 }
191 } else if ((old_rear & 0xff00) != 0xff00) { /* assume that unused bits are 1 */
192 if (net_debug>1) {
193 printk("seeq8005: unused rear bits != 0xff00\n");
194 printk(" == 0x%04x\n",old_rear);
195 }
196 retval = -ENODEV;
197 goto out;
198 }
200 old_cfg2 = inw(SEEQ_CFG2); /* read CFG2 register */
201 old_cfg1 = inw(SEEQ_CFG1);
202 old_dmaar = inw(SEEQ_DMAAR);
204 if (net_debug>4) {
205 printk("seeq8005: stat = 0x%04x\n",old_stat);
206 printk("seeq8005: cfg1 = 0x%04x\n",old_cfg1);
207 printk("seeq8005: cfg2 = 0x%04x\n",old_cfg2);
208 printk("seeq8005: raer = 0x%04x\n",old_rear);
209 printk("seeq8005: dmaar= 0x%04x\n",old_dmaar);
210 }
212 outw( SEEQCMD_FIFO_WRITE | SEEQCMD_SET_ALL_OFF, SEEQ_CMD); /* setup for reading PROM */
213 outw( 0, SEEQ_DMAAR); /* set starting PROM address */
214 outw( SEEQCFG1_BUFFER_PROM, SEEQ_CFG1); /* set buffer to look at PROM */
217 j=0;
218 for(i=0; i <32; i++) {
219 j+= SA_prom[i] = inw(SEEQ_BUFFER) & 0xff;
220 }
222 #if 0
223 /* untested because I only have the one card */
224 if ( (j&0xff) != 0 ) { /* checksum appears to be 8bit = 0 */
225 if (net_debug>1) { /* check this before deciding that we have a card */
226 printk("seeq8005: prom sum error\n");
227 }
228 outw( old_stat, SEEQ_STATUS);
229 outw( old_dmaar, SEEQ_DMAAR);
230 outw( old_cfg1, SEEQ_CFG1);
231 retval = -ENODEV;
232 goto out;
233 }
234 #endif
236 outw( SEEQCFG2_RESET, SEEQ_CFG2); /* reset the card */
237 udelay(5);
238 outw( SEEQCMD_SET_ALL_OFF, SEEQ_CMD);
240 if (net_debug) {
241 printk("seeq8005: prom sum = 0x%08x\n",j);
242 for(j=0; j<32; j+=16) {
243 printk("seeq8005: prom %02x: ",j);
244 for(i=0;i<16;i++) {
245 printk("%02x ",SA_prom[j|i]);
246 }
247 printk(" ");
248 for(i=0;i<16;i++) {
249 if ((SA_prom[j|i]>31)&&(SA_prom[j|i]<127)) {
250 printk("%c", SA_prom[j|i]);
251 } else {
252 printk(" ");
253 }
254 }
255 printk("\n");
256 }
257 }
259 #if 0
260 /*
261 * testing the packet buffer memory doesn't work yet
262 * but all other buffer accesses do
263 * - fixing is not a priority
264 */
265 if (net_debug>1) { /* test packet buffer memory */
266 printk("seeq8005: testing packet buffer ... ");
267 outw( SEEQCFG1_BUFFER_BUFFER, SEEQ_CFG1);
268 outw( SEEQCMD_FIFO_WRITE | SEEQCMD_SET_ALL_OFF, SEEQ_CMD);
269 outw( 0 , SEEQ_DMAAR);
270 for(i=0;i<32768;i++) {
271 outw(0x5a5a, SEEQ_BUFFER);
272 }
273 j=jiffies+HZ;
274 while ( ((inw(SEEQ_STATUS) & SEEQSTAT_FIFO_EMPTY) != SEEQSTAT_FIFO_EMPTY) && time_before(jiffies, j) )
275 mb();
276 outw( 0 , SEEQ_DMAAR);
277 while ( ((inw(SEEQ_STATUS) & SEEQSTAT_WINDOW_INT) != SEEQSTAT_WINDOW_INT) && time_before(jiffies, j+HZ))
278 mb();
279 if ( (inw(SEEQ_STATUS) & SEEQSTAT_WINDOW_INT) == SEEQSTAT_WINDOW_INT)
280 outw( SEEQCMD_WINDOW_INT_ACK | (inw(SEEQ_STATUS)& SEEQCMD_INT_MASK), SEEQ_CMD);
281 outw( SEEQCMD_FIFO_READ | SEEQCMD_SET_ALL_OFF, SEEQ_CMD);
282 j=0;
283 for(i=0;i<32768;i++) {
284 if (inw(SEEQ_BUFFER) != 0x5a5a)
285 j++;
286 }
287 if (j) {
288 printk("%i\n",j);
289 } else {
290 printk("ok.\n");
291 }
292 }
293 #endif
295 if (net_debug && version_printed++ == 0)
296 printk(version);
298 printk("%s: %s found at %#3x, ", dev->name, "seeq8005", ioaddr);
300 /* Fill in the 'dev' fields. */
301 dev->base_addr = ioaddr;
302 dev->irq = irq;
304 /* Retrieve and print the ethernet address. */
305 for (i = 0; i < 6; i++)
306 printk(" %2.2x", dev->dev_addr[i] = SA_prom[i+6]);
308 if (dev->irq == 0xff)
309 ; /* Do nothing: a user-level program will set it. */
310 else if (dev->irq < 2) { /* "Auto-IRQ" */
311 unsigned long cookie = probe_irq_on();
313 outw( SEEQCMD_RX_INT_EN | SEEQCMD_SET_RX_ON | SEEQCMD_SET_RX_OFF, SEEQ_CMD );
315 dev->irq = probe_irq_off(cookie);
317 if (net_debug >= 2)
318 printk(" autoirq is %d\n", dev->irq);
319 } else if (dev->irq == 2)
320 /* Fixup for users that don't know that IRQ 2 is really IRQ 9,
321 * or don't know which one to set.
322 */
323 dev->irq = 9;
325 #if 0
326 {
327 int irqval = request_irq(dev->irq, &seeq8005_interrupt, 0, "seeq8005", dev);
328 if (irqval) {
329 printk ("%s: unable to get IRQ %d (irqval=%d).\n", dev->name,
330 dev->irq, irqval);
331 retval = -EAGAIN;
332 goto out;
333 }
334 }
335 #endif
336 dev->open = seeq8005_open;
337 dev->stop = seeq8005_close;
338 dev->hard_start_xmit = seeq8005_send_packet;
339 dev->tx_timeout = seeq8005_timeout;
340 dev->watchdog_timeo = HZ/20;
341 dev->get_stats = seeq8005_get_stats;
342 dev->set_multicast_list = set_multicast_list;
343 dev->flags &= ~IFF_MULTICAST;
345 return 0;
346 out:
347 release_region(ioaddr, SEEQ8005_IO_EXTENT);
348 return retval;
349 }
352 /* Open/initialize the board. This is called (in the current kernel)
353 sometime after booting when the 'ifconfig' program is run.
355 This routine should set everything up anew at each open, even
356 registers that "should" only need to be set once at boot, so that
357 there is non-reboot way to recover if something goes wrong.
358 */
359 static int seeq8005_open(struct net_device *dev)
360 {
361 struct net_local *lp = netdev_priv(dev);
363 {
364 int irqval = request_irq(dev->irq, &seeq8005_interrupt, 0, "seeq8005", dev);
365 if (irqval) {
366 printk ("%s: unable to get IRQ %d (irqval=%d).\n", dev->name,
367 dev->irq, irqval);
368 return -EAGAIN;
369 }
370 }
372 /* Reset the hardware here. Don't forget to set the station address. */
373 seeq8005_init(dev, 1);
375 lp->open_time = jiffies;
377 netif_start_queue(dev);
378 return 0;
379 }
381 static void seeq8005_timeout(struct net_device *dev)
382 {
383 int ioaddr = dev->base_addr;
384 printk(KERN_WARNING "%s: transmit timed out, %s?\n", dev->name,
385 tx_done(dev) ? "IRQ conflict" : "network cable problem");
386 /* Try to restart the adaptor. */
387 seeq8005_init(dev, 1);
388 dev->trans_start = jiffies;
389 netif_wake_queue(dev);
390 }
392 static int seeq8005_send_packet(struct sk_buff *skb, struct net_device *dev)
393 {
394 struct net_local *lp = netdev_priv(dev);
395 short length = skb->len;
396 unsigned char *buf;
398 if (length < ETH_ZLEN) {
399 if (skb_padto(skb, ETH_ZLEN))
400 return 0;
401 length = ETH_ZLEN;
402 }
403 buf = skb->data;
405 /* Block a timer-based transmit from overlapping */
406 netif_stop_queue(dev);
408 hardware_send_packet(dev, buf, length);
409 dev->trans_start = jiffies;
410 lp->stats.tx_bytes += length;
411 dev_kfree_skb (skb);
412 /* You might need to clean up and record Tx statistics here. */
414 return 0;
415 }
417 /*
418 * wait_for_buffer
419 *
420 * This routine waits for the SEEQ chip to assert that the FIFO is ready
421 * by checking for a window interrupt, and then clearing it. This has to
422 * occur in the interrupt handler!
423 */
424 inline void wait_for_buffer(struct net_device * dev)
425 {
426 int ioaddr = dev->base_addr;
427 unsigned long tmp;
428 int status;
430 tmp = jiffies + HZ;
431 while ( ( ((status=inw(SEEQ_STATUS)) & SEEQSTAT_WINDOW_INT) != SEEQSTAT_WINDOW_INT) && time_before(jiffies, tmp))
432 cpu_relax();
434 if ( (status & SEEQSTAT_WINDOW_INT) == SEEQSTAT_WINDOW_INT)
435 outw( SEEQCMD_WINDOW_INT_ACK | (status & SEEQCMD_INT_MASK), SEEQ_CMD);
436 }
438 /* The typical workload of the driver:
439 Handle the network interface interrupts. */
440 static irqreturn_t seeq8005_interrupt(int irq, void *dev_id, struct pt_regs * regs)
441 {
442 struct net_device *dev = dev_id;
443 struct net_local *lp;
444 int ioaddr, status, boguscount = 0;
445 int handled = 0;
447 ioaddr = dev->base_addr;
448 lp = netdev_priv(dev);
450 status = inw(SEEQ_STATUS);
451 do {
452 if (net_debug >2) {
453 printk("%s: int, status=0x%04x\n",dev->name,status);
454 }
456 if (status & SEEQSTAT_WINDOW_INT) {
457 handled = 1;
458 outw( SEEQCMD_WINDOW_INT_ACK | (status & SEEQCMD_INT_MASK), SEEQ_CMD);
459 if (net_debug) {
460 printk("%s: window int!\n",dev->name);
461 }
462 }
463 if (status & SEEQSTAT_TX_INT) {
464 handled = 1;
465 outw( SEEQCMD_TX_INT_ACK | (status & SEEQCMD_INT_MASK), SEEQ_CMD);
466 lp->stats.tx_packets++;
467 netif_wake_queue(dev); /* Inform upper layers. */
468 }
469 if (status & SEEQSTAT_RX_INT) {
470 handled = 1;
471 /* Got a packet(s). */
472 seeq8005_rx(dev);
473 }
474 status = inw(SEEQ_STATUS);
475 } while ( (++boguscount < 10) && (status & SEEQSTAT_ANY_INT)) ;
477 if(net_debug>2) {
478 printk("%s: eoi\n",dev->name);
479 }
480 return IRQ_RETVAL(handled);
481 }
483 /* We have a good packet(s), get it/them out of the buffers. */
484 static void seeq8005_rx(struct net_device *dev)
485 {
486 struct net_local *lp = netdev_priv(dev);
487 int boguscount = 10;
488 int pkt_hdr;
489 int ioaddr = dev->base_addr;
491 do {
492 int next_packet;
493 int pkt_len;
494 int i;
495 int status;
497 status = inw(SEEQ_STATUS);
498 outw( lp->receive_ptr, SEEQ_DMAAR);
499 outw(SEEQCMD_FIFO_READ | SEEQCMD_RX_INT_ACK | (status & SEEQCMD_INT_MASK), SEEQ_CMD);
500 wait_for_buffer(dev);
501 next_packet = ntohs(inw(SEEQ_BUFFER));
502 pkt_hdr = inw(SEEQ_BUFFER);
504 if (net_debug>2) {
505 printk("%s: 0x%04x recv next=0x%04x, hdr=0x%04x\n",dev->name,lp->receive_ptr,next_packet,pkt_hdr);
506 }
508 if ((next_packet == 0) || ((pkt_hdr & SEEQPKTH_CHAIN)==0)) { /* Read all the frames? */
509 return; /* Done for now */
510 }
512 if ((pkt_hdr & SEEQPKTS_DONE)==0)
513 break;
515 if (next_packet < lp->receive_ptr) {
516 pkt_len = (next_packet + 0x10000 - ((DEFAULT_TEA+1)<<8)) - lp->receive_ptr - 4;
517 } else {
518 pkt_len = next_packet - lp->receive_ptr - 4;
519 }
521 if (next_packet < ((DEFAULT_TEA+1)<<8)) { /* is the next_packet address sane? */
522 printk("%s: recv packet ring corrupt, resetting board\n",dev->name);
523 seeq8005_init(dev,1);
524 return;
525 }
527 lp->receive_ptr = next_packet;
529 if (net_debug>2) {
530 printk("%s: recv len=0x%04x\n",dev->name,pkt_len);
531 }
533 if (pkt_hdr & SEEQPKTS_ANY_ERROR) { /* There was an error. */
534 lp->stats.rx_errors++;
535 if (pkt_hdr & SEEQPKTS_SHORT) lp->stats.rx_frame_errors++;
536 if (pkt_hdr & SEEQPKTS_DRIB) lp->stats.rx_frame_errors++;
537 if (pkt_hdr & SEEQPKTS_OVERSIZE) lp->stats.rx_over_errors++;
538 if (pkt_hdr & SEEQPKTS_CRC_ERR) lp->stats.rx_crc_errors++;
539 /* skip over this packet */
540 outw( SEEQCMD_FIFO_WRITE | SEEQCMD_DMA_INT_ACK | (status & SEEQCMD_INT_MASK), SEEQ_CMD);
541 outw( (lp->receive_ptr & 0xff00)>>8, SEEQ_REA);
542 } else {
543 /* Malloc up new buffer. */
544 struct sk_buff *skb;
545 unsigned char *buf;
547 skb = dev_alloc_skb(pkt_len);
548 if (skb == NULL) {
549 printk("%s: Memory squeeze, dropping packet.\n", dev->name);
550 lp->stats.rx_dropped++;
551 break;
552 }
553 skb->dev = dev;
554 skb_reserve(skb, 2); /* align data on 16 byte */
555 buf = skb_put(skb,pkt_len);
557 insw(SEEQ_BUFFER, buf, (pkt_len + 1) >> 1);
559 if (net_debug>2) {
560 char * p = buf;
561 printk("%s: recv ",dev->name);
562 for(i=0;i<14;i++) {
563 printk("%02x ",*(p++)&0xff);
564 }
565 printk("\n");
566 }
568 skb->protocol=eth_type_trans(skb,dev);
569 netif_rx(skb);
570 dev->last_rx = jiffies;
571 lp->stats.rx_packets++;
572 lp->stats.rx_bytes += pkt_len;
573 }
574 } while ((--boguscount) && (pkt_hdr & SEEQPKTH_CHAIN));
576 /* If any worth-while packets have been received, netif_rx()
577 has done a mark_bh(NET_BH) for us and will work on them
578 when we get to the bottom-half routine. */
579 return;
580 }
582 /* The inverse routine to net_open(). */
583 static int seeq8005_close(struct net_device *dev)
584 {
585 struct net_local *lp = netdev_priv(dev);
586 int ioaddr = dev->base_addr;
588 lp->open_time = 0;
590 netif_stop_queue(dev);
592 /* Flush the Tx and disable Rx here. */
593 outw( SEEQCMD_SET_ALL_OFF, SEEQ_CMD);
595 free_irq(dev->irq, dev);
597 /* Update the statistics here. */
599 return 0;
601 }
603 /* Get the current statistics. This may be called with the card open or
604 closed. */
605 static struct net_device_stats *seeq8005_get_stats(struct net_device *dev)
606 {
607 struct net_local *lp = netdev_priv(dev);
609 return &lp->stats;
610 }
612 /* Set or clear the multicast filter for this adaptor.
613 num_addrs == -1 Promiscuous mode, receive all packets
614 num_addrs == 0 Normal mode, clear multicast list
615 num_addrs > 0 Multicast mode, receive normal and MC packets, and do
616 best-effort filtering.
617 */
618 static void set_multicast_list(struct net_device *dev)
619 {
620 /*
621 * I _could_ do up to 6 addresses here, but won't (yet?)
622 */
624 #if 0
625 int ioaddr = dev->base_addr;
626 /*
627 * hmm, not even sure if my matching works _anyway_ - seem to be receiving
628 * _everything_ . . .
629 */
631 if (num_addrs) { /* Enable promiscuous mode */
632 outw( (inw(SEEQ_CFG1) & ~SEEQCFG1_MATCH_MASK)| SEEQCFG1_MATCH_ALL, SEEQ_CFG1);
633 dev->flags|=IFF_PROMISC;
634 } else { /* Disable promiscuous mode, use normal mode */
635 outw( (inw(SEEQ_CFG1) & ~SEEQCFG1_MATCH_MASK)| SEEQCFG1_MATCH_BROAD, SEEQ_CFG1);
636 }
637 #endif
638 }
640 void seeq8005_init(struct net_device *dev, int startp)
641 {
642 struct net_local *lp = netdev_priv(dev);
643 int ioaddr = dev->base_addr;
644 int i;
646 outw(SEEQCFG2_RESET, SEEQ_CFG2); /* reset device */
647 udelay(5);
649 outw( SEEQCMD_FIFO_WRITE | SEEQCMD_SET_ALL_OFF, SEEQ_CMD);
650 outw( 0, SEEQ_DMAAR); /* load start address into both low and high byte */
651 /* wait_for_buffer(dev); */ /* I think that you only need a wait for memory buffer */
652 outw( SEEQCFG1_BUFFER_MAC0, SEEQ_CFG1);
654 for(i=0;i<6;i++) { /* set Station address */
655 outb(dev->dev_addr[i], SEEQ_BUFFER);
656 udelay(2);
657 }
659 outw( SEEQCFG1_BUFFER_TEA, SEEQ_CFG1); /* set xmit end area pointer to 16K */
660 outb( DEFAULT_TEA, SEEQ_BUFFER); /* this gives us 16K of send buffer and 48K of recv buffer */
662 lp->receive_ptr = (DEFAULT_TEA+1)<<8; /* so we can find our packet_header */
663 outw( lp->receive_ptr, SEEQ_RPR); /* Receive Pointer Register is set to recv buffer memory */
665 outw( 0x00ff, SEEQ_REA); /* Receive Area End */
667 if (net_debug>4) {
668 printk("%s: SA0 = ",dev->name);
670 outw( SEEQCMD_FIFO_READ | SEEQCMD_SET_ALL_OFF, SEEQ_CMD);
671 outw( 0, SEEQ_DMAAR);
672 outw( SEEQCFG1_BUFFER_MAC0, SEEQ_CFG1);
674 for(i=0;i<6;i++) {
675 printk("%02x ",inb(SEEQ_BUFFER));
676 }
677 printk("\n");
678 }
680 outw( SEEQCFG1_MAC0_EN | SEEQCFG1_MATCH_BROAD | SEEQCFG1_BUFFER_BUFFER, SEEQ_CFG1);
681 outw( SEEQCFG2_AUTO_REA | SEEQCFG2_CTRLO, SEEQ_CFG2);
682 outw( SEEQCMD_SET_RX_ON | SEEQCMD_TX_INT_EN | SEEQCMD_RX_INT_EN, SEEQ_CMD);
684 if (net_debug>4) {
685 int old_cfg1;
686 old_cfg1 = inw(SEEQ_CFG1);
687 printk("%s: stat = 0x%04x\n",dev->name,inw(SEEQ_STATUS));
688 printk("%s: cfg1 = 0x%04x\n",dev->name,old_cfg1);
689 printk("%s: cfg2 = 0x%04x\n",dev->name,inw(SEEQ_CFG2));
690 printk("%s: raer = 0x%04x\n",dev->name,inw(SEEQ_REA));
691 printk("%s: dmaar= 0x%04x\n",dev->name,inw(SEEQ_DMAAR));
693 }
694 }
697 static void hardware_send_packet(struct net_device * dev, char *buf, int length)
698 {
699 int ioaddr = dev->base_addr;
700 int status = inw(SEEQ_STATUS);
701 int transmit_ptr = 0;
702 unsigned long tmp;
704 if (net_debug>4) {
705 printk("%s: send 0x%04x\n",dev->name,length);
706 }
708 /* Set FIFO to writemode and set packet-buffer address */
709 outw( SEEQCMD_FIFO_WRITE | (status & SEEQCMD_INT_MASK), SEEQ_CMD);
710 outw( transmit_ptr, SEEQ_DMAAR);
712 /* output SEEQ Packet header barfage */
713 outw( htons(length + 4), SEEQ_BUFFER);
714 outw( SEEQPKTH_XMIT | SEEQPKTH_DATA_FOLLOWS | SEEQPKTH_XMIT_INT_EN, SEEQ_BUFFER );
716 /* blat the buffer */
717 outsw( SEEQ_BUFFER, buf, (length +1) >> 1);
718 /* paranoia !! */
719 outw( 0, SEEQ_BUFFER);
720 outw( 0, SEEQ_BUFFER);
722 /* set address of start of transmit chain */
723 outw( transmit_ptr, SEEQ_TPR);
725 /* drain FIFO */
726 tmp = jiffies;
727 while ( (((status=inw(SEEQ_STATUS)) & SEEQSTAT_FIFO_EMPTY) == 0) && time_before(jiffies, tmp + HZ))
728 mb();
730 /* doit ! */
731 outw( SEEQCMD_WINDOW_INT_ACK | SEEQCMD_SET_TX_ON | (status & SEEQCMD_INT_MASK), SEEQ_CMD);
733 }
736 #ifdef MODULE
738 static struct net_device *dev_seeq;
739 MODULE_LICENSE("GPL");
740 module_param(io, int, 0);
741 module_param(irq, int, 0);
742 MODULE_PARM_DESC(io, "SEEQ 8005 I/O base address");
743 MODULE_PARM_DESC(irq, "SEEQ 8005 IRQ number");
745 int __init init_module(void)
746 {
747 dev_seeq = seeq8005_probe(-1);
748 if (IS_ERR(dev_seeq))
749 return PTR_ERR(dev_seeq);
750 return 0;
751 }
753 void cleanup_module(void)
754 {
755 unregister_netdev(dev_seeq);
756 release_region(dev_seeq->base_addr, SEEQ8005_IO_EXTENT);
757 free_netdev(dev_seeq);
758 }
760 #endif /* MODULE */
762 /*
763 * Local variables:
764 * compile-command: "gcc -D__KERNEL__ -I/usr/src/linux/net/inet -Wall -Wstrict-prototypes -O6 -m486 -c skeleton.c"
765 * version-control: t
766 * kept-new-versions: 5
767 * tab-width: 4
768 * End:
769 */