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Al Viro6c3561b2006-10-10 00:19:36 +01001/* 8390.c: A general NS8390 ethernet driver core for linux. */
2/*
3 Written 1992-94 by Donald Becker.
4
5 Copyright 1993 United States Government as represented by the
6 Director, National Security Agency.
7
8 This software may be used and distributed according to the terms
9 of the GNU General Public License, incorporated herein by reference.
10
11 The author may be reached as becker@scyld.com, or C/O
12 Scyld Computing Corporation
13 410 Severn Ave., Suite 210
14 Annapolis MD 21403
15
16
17 This is the chip-specific code for many 8390-based ethernet adaptors.
18 This is not a complete driver, it must be combined with board-specific
19 code such as ne.c, wd.c, 3c503.c, etc.
20
21 Seeing how at least eight drivers use this code, (not counting the
22 PCMCIA ones either) it is easy to break some card by what seems like
23 a simple innocent change. Please contact me or Donald if you think
24 you have found something that needs changing. -- PG
25
26
27 Changelog:
28
29 Paul Gortmaker : remove set_bit lock, other cleanups.
30 Paul Gortmaker : add ei_get_8390_hdr() so we can pass skb's to
31 ei_block_input() for eth_io_copy_and_sum().
32 Paul Gortmaker : exchange static int ei_pingpong for a #define,
33 also add better Tx error handling.
34 Paul Gortmaker : rewrite Rx overrun handling as per NS specs.
35 Alexey Kuznetsov : use the 8390's six bit hash multicast filter.
36 Paul Gortmaker : tweak ANK's above multicast changes a bit.
37 Paul Gortmaker : update packet statistics for v2.1.x
38 Alan Cox : support arbitary stupid port mappings on the
39 68K Macintosh. Support >16bit I/O spaces
40 Paul Gortmaker : add kmod support for auto-loading of the 8390
41 module by all drivers that require it.
42 Alan Cox : Spinlocking work, added 'BUG_83C690'
43 Paul Gortmaker : Separate out Tx timeout code from Tx path.
44 Paul Gortmaker : Remove old unused single Tx buffer code.
45 Hayato Fujiwara : Add m32r support.
46 Paul Gortmaker : use skb_padto() instead of stack scratch area
47
48 Sources:
49 The National Semiconductor LAN Databook, and the 3Com 3c503 databook.
50
51 */
52
53#include <linux/module.h>
54#include <linux/kernel.h>
55#include <linux/jiffies.h>
56#include <linux/fs.h>
57#include <linux/types.h>
58#include <linux/string.h>
59#include <linux/bitops.h>
60#include <asm/system.h>
61#include <asm/uaccess.h>
62#include <asm/io.h>
63#include <asm/irq.h>
64#include <linux/delay.h>
65#include <linux/errno.h>
66#include <linux/fcntl.h>
67#include <linux/in.h>
68#include <linux/interrupt.h>
69#include <linux/init.h>
70#include <linux/crc32.h>
71
72#include <linux/netdevice.h>
73#include <linux/etherdevice.h>
74
75#define NS8390_CORE
76#include "8390.h"
77
78#define BUG_83C690
79
80/* These are the operational function interfaces to board-specific
81 routines.
82 void reset_8390(struct net_device *dev)
83 Resets the board associated with DEV, including a hardware reset of
84 the 8390. This is only called when there is a transmit timeout, and
85 it is always followed by 8390_init().
86 void block_output(struct net_device *dev, int count, const unsigned char *buf,
87 int start_page)
88 Write the COUNT bytes of BUF to the packet buffer at START_PAGE. The
89 "page" value uses the 8390's 256-byte pages.
90 void get_8390_hdr(struct net_device *dev, struct e8390_hdr *hdr, int ring_page)
91 Read the 4 byte, page aligned 8390 header. *If* there is a
92 subsequent read, it will be of the rest of the packet.
93 void block_input(struct net_device *dev, int count, struct sk_buff *skb, int ring_offset)
94 Read COUNT bytes from the packet buffer into the skb data area. Start
95 reading from RING_OFFSET, the address as the 8390 sees it. This will always
96 follow the read of the 8390 header.
97*/
98#define ei_reset_8390 (ei_local->reset_8390)
99#define ei_block_output (ei_local->block_output)
100#define ei_block_input (ei_local->block_input)
101#define ei_get_8390_hdr (ei_local->get_8390_hdr)
102
103/* use 0 for production, 1 for verification, >2 for debug */
104#ifndef ei_debug
105int ei_debug = 1;
106#endif
107
108/* Index to functions. */
109static void ei_tx_intr(struct net_device *dev);
110static void ei_tx_err(struct net_device *dev);
Stephen Hemminger4e4fd4e2008-11-21 17:39:02 -0800111void ei_tx_timeout(struct net_device *dev);
Al Viro6c3561b2006-10-10 00:19:36 +0100112static void ei_receive(struct net_device *dev);
113static void ei_rx_overrun(struct net_device *dev);
114
115/* Routines generic to NS8390-based boards. */
116static void NS8390_trigger_send(struct net_device *dev, unsigned int length,
117 int start_page);
Al Viro6c3561b2006-10-10 00:19:36 +0100118static void do_set_multicast_list(struct net_device *dev);
119static void __NS8390_init(struct net_device *dev, int startp);
120
121/*
122 * SMP and the 8390 setup.
123 *
124 * The 8390 isnt exactly designed to be multithreaded on RX/TX. There is
125 * a page register that controls bank and packet buffer access. We guard
126 * this with ei_local->page_lock. Nobody should assume or set the page other
127 * than zero when the lock is not held. Lock holders must restore page 0
128 * before unlocking. Even pure readers must take the lock to protect in
129 * page 0.
130 *
131 * To make life difficult the chip can also be very slow. We therefore can't
132 * just use spinlocks. For the longer lockups we disable the irq the device
133 * sits on and hold the lock. We must hold the lock because there is a dual
134 * processor case other than interrupts (get stats/set multicast list in
135 * parallel with each other and transmit).
136 *
137 * Note: in theory we can just disable the irq on the card _but_ there is
138 * a latency on SMP irq delivery. So we can easily go "disable irq" "sync irqs"
139 * enter lock, take the queued irq. So we waddle instead of flying.
140 *
141 * Finally by special arrangement for the purpose of being generally
142 * annoying the transmit function is called bh atomic. That places
143 * restrictions on the user context callers as disable_irq won't save
144 * them.
Jarek Poplawski55b7b622007-07-26 14:44:01 +0200145 *
146 * Additional explanation of problems with locking by Alan Cox:
147 *
148 * "The author (me) didn't use spin_lock_irqsave because the slowness of the
149 * card means that approach caused horrible problems like losing serial data
Robert P. J. Day14e4a0f2008-02-03 15:12:15 +0200150 * at 38400 baud on some chips. Remember many 8390 nics on PCI were ISA
Jarek Poplawski55b7b622007-07-26 14:44:01 +0200151 * chips with FPGA front ends.
Jeff Garzik3f8cb092008-05-13 01:41:28 -0400152 *
Jarek Poplawski55b7b622007-07-26 14:44:01 +0200153 * Ok the logic behind the 8390 is very simple:
Jeff Garzik3f8cb092008-05-13 01:41:28 -0400154 *
Jarek Poplawski55b7b622007-07-26 14:44:01 +0200155 * Things to know
156 * - IRQ delivery is asynchronous to the PCI bus
157 * - Blocking the local CPU IRQ via spin locks was too slow
158 * - The chip has register windows needing locking work
Jeff Garzik3f8cb092008-05-13 01:41:28 -0400159 *
Jarek Poplawski55b7b622007-07-26 14:44:01 +0200160 * So the path was once (I say once as people appear to have changed it
161 * in the mean time and it now looks rather bogus if the changes to use
162 * disable_irq_nosync_irqsave are disabling the local IRQ)
Jeff Garzik3f8cb092008-05-13 01:41:28 -0400163 *
164 *
Jarek Poplawski55b7b622007-07-26 14:44:01 +0200165 * Take the page lock
166 * Mask the IRQ on chip
167 * Disable the IRQ (but not mask locally- someone seems to have
168 * broken this with the lock validator stuff)
169 * [This must be _nosync as the page lock may otherwise
170 * deadlock us]
171 * Drop the page lock and turn IRQs back on
Jeff Garzik3f8cb092008-05-13 01:41:28 -0400172 *
Jarek Poplawski55b7b622007-07-26 14:44:01 +0200173 * At this point an existing IRQ may still be running but we can't
174 * get a new one
Jeff Garzik3f8cb092008-05-13 01:41:28 -0400175 *
Jarek Poplawski55b7b622007-07-26 14:44:01 +0200176 * Take the lock (so we know the IRQ has terminated) but don't mask
177 * the IRQs on the processor
178 * Set irqlock [for debug]
Jeff Garzik3f8cb092008-05-13 01:41:28 -0400179 *
Jarek Poplawski55b7b622007-07-26 14:44:01 +0200180 * Transmit (slow as ****)
Jeff Garzik3f8cb092008-05-13 01:41:28 -0400181 *
Jarek Poplawski55b7b622007-07-26 14:44:01 +0200182 * re-enable the IRQ
Jeff Garzik3f8cb092008-05-13 01:41:28 -0400183 *
184 *
Jarek Poplawski55b7b622007-07-26 14:44:01 +0200185 * We have to use disable_irq because otherwise you will get delayed
186 * interrupts on the APIC bus deadlocking the transmit path.
Jeff Garzik3f8cb092008-05-13 01:41:28 -0400187 *
Jarek Poplawski55b7b622007-07-26 14:44:01 +0200188 * Quite hairy but the chip simply wasn't designed for SMP and you can't
189 * even ACK an interrupt without risking corrupting other parallel
190 * activities on the chip." [lkml, 25 Jul 2007]
Al Viro6c3561b2006-10-10 00:19:36 +0100191 */
192
193
194
195/**
196 * ei_open - Open/initialize the board.
197 * @dev: network device to initialize
198 *
199 * This routine goes all-out, setting everything
200 * up anew at each open, even though many of these registers should only
201 * need to be set once at boot.
202 */
203static int __ei_open(struct net_device *dev)
204{
205 unsigned long flags;
206 struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
207
Al Viro6c3561b2006-10-10 00:19:36 +0100208 if (dev->watchdog_timeo <= 0)
209 dev->watchdog_timeo = TX_TIMEOUT;
210
211 /*
212 * Grab the page lock so we own the register set, then call
213 * the init function.
214 */
215
216 spin_lock_irqsave(&ei_local->page_lock, flags);
217 __NS8390_init(dev, 1);
218 /* Set the flag before we drop the lock, That way the IRQ arrives
219 after its set and we get no silly warnings */
220 netif_start_queue(dev);
221 spin_unlock_irqrestore(&ei_local->page_lock, flags);
222 ei_local->irqlock = 0;
223 return 0;
224}
225
226/**
227 * ei_close - shut down network device
228 * @dev: network device to close
229 *
230 * Opposite of ei_open(). Only used when "ifconfig <devname> down" is done.
231 */
232static int __ei_close(struct net_device *dev)
233{
234 struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
235 unsigned long flags;
236
237 /*
238 * Hold the page lock during close
239 */
240
241 spin_lock_irqsave(&ei_local->page_lock, flags);
242 __NS8390_init(dev, 0);
243 spin_unlock_irqrestore(&ei_local->page_lock, flags);
244 netif_stop_queue(dev);
245 return 0;
246}
247
248/**
249 * ei_tx_timeout - handle transmit time out condition
250 * @dev: network device which has apparently fallen asleep
251 *
252 * Called by kernel when device never acknowledges a transmit has
253 * completed (or failed) - i.e. never posted a Tx related interrupt.
254 */
255
Stephen Hemminger8884c092008-11-25 18:12:49 -0800256static void __ei_tx_timeout(struct net_device *dev)
Al Viro6c3561b2006-10-10 00:19:36 +0100257{
258 unsigned long e8390_base = dev->base_addr;
259 struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
260 int txsr, isr, tickssofar = jiffies - dev->trans_start;
261 unsigned long flags;
262
Paulius Zaleckas244d74f2008-05-07 02:20:40 +0300263 dev->stats.tx_errors++;
Al Viro6c3561b2006-10-10 00:19:36 +0100264
265 spin_lock_irqsave(&ei_local->page_lock, flags);
266 txsr = ei_inb(e8390_base+EN0_TSR);
267 isr = ei_inb(e8390_base+EN0_ISR);
268 spin_unlock_irqrestore(&ei_local->page_lock, flags);
269
270 printk(KERN_DEBUG "%s: Tx timed out, %s TSR=%#2x, ISR=%#2x, t=%d.\n",
271 dev->name, (txsr & ENTSR_ABT) ? "excess collisions." :
272 (isr) ? "lost interrupt?" : "cable problem?", txsr, isr, tickssofar);
273
Paulius Zaleckas244d74f2008-05-07 02:20:40 +0300274 if (!isr && !dev->stats.tx_packets)
Al Viro6c3561b2006-10-10 00:19:36 +0100275 {
276 /* The 8390 probably hasn't gotten on the cable yet. */
277 ei_local->interface_num ^= 1; /* Try a different xcvr. */
278 }
279
280 /* Ugly but a reset can be slow, yet must be protected */
281
282 disable_irq_nosync_lockdep(dev->irq);
283 spin_lock(&ei_local->page_lock);
284
285 /* Try to restart the card. Perhaps the user has fixed something. */
286 ei_reset_8390(dev);
287 __NS8390_init(dev, 1);
288
289 spin_unlock(&ei_local->page_lock);
290 enable_irq_lockdep(dev->irq);
291 netif_wake_queue(dev);
292}
293
294/**
295 * ei_start_xmit - begin packet transmission
296 * @skb: packet to be sent
297 * @dev: network device to which packet is sent
298 *
299 * Sends a packet to an 8390 network device.
300 */
301
Stephen Hemminger8884c092008-11-25 18:12:49 -0800302static int __ei_start_xmit(struct sk_buff *skb, struct net_device *dev)
Al Viro6c3561b2006-10-10 00:19:36 +0100303{
304 unsigned long e8390_base = dev->base_addr;
305 struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
306 int send_length = skb->len, output_page;
307 unsigned long flags;
308 char buf[ETH_ZLEN];
309 char *data = skb->data;
310
311 if (skb->len < ETH_ZLEN) {
312 memset(buf, 0, ETH_ZLEN); /* more efficient than doing just the needed bits */
313 memcpy(buf, data, skb->len);
314 send_length = ETH_ZLEN;
315 data = buf;
316 }
317
318 /* Mask interrupts from the ethercard.
319 SMP: We have to grab the lock here otherwise the IRQ handler
320 on another CPU can flip window and race the IRQ mask set. We end
321 up trashing the mcast filter not disabling irqs if we don't lock */
322
323 spin_lock_irqsave(&ei_local->page_lock, flags);
324 ei_outb_p(0x00, e8390_base + EN0_IMR);
325 spin_unlock_irqrestore(&ei_local->page_lock, flags);
326
327
328 /*
329 * Slow phase with lock held.
330 */
331
332 disable_irq_nosync_lockdep_irqsave(dev->irq, &flags);
333
334 spin_lock(&ei_local->page_lock);
335
336 ei_local->irqlock = 1;
337
338 /*
339 * We have two Tx slots available for use. Find the first free
340 * slot, and then perform some sanity checks. With two Tx bufs,
341 * you get very close to transmitting back-to-back packets. With
342 * only one Tx buf, the transmitter sits idle while you reload the
343 * card, leaving a substantial gap between each transmitted packet.
344 */
345
346 if (ei_local->tx1 == 0)
347 {
348 output_page = ei_local->tx_start_page;
349 ei_local->tx1 = send_length;
350 if (ei_debug && ei_local->tx2 > 0)
351 printk(KERN_DEBUG "%s: idle transmitter tx2=%d, lasttx=%d, txing=%d.\n",
352 dev->name, ei_local->tx2, ei_local->lasttx, ei_local->txing);
353 }
354 else if (ei_local->tx2 == 0)
355 {
356 output_page = ei_local->tx_start_page + TX_PAGES/2;
357 ei_local->tx2 = send_length;
358 if (ei_debug && ei_local->tx1 > 0)
359 printk(KERN_DEBUG "%s: idle transmitter, tx1=%d, lasttx=%d, txing=%d.\n",
360 dev->name, ei_local->tx1, ei_local->lasttx, ei_local->txing);
361 }
362 else
363 { /* We should never get here. */
364 if (ei_debug)
365 printk(KERN_DEBUG "%s: No Tx buffers free! tx1=%d tx2=%d last=%d\n",
366 dev->name, ei_local->tx1, ei_local->tx2, ei_local->lasttx);
367 ei_local->irqlock = 0;
368 netif_stop_queue(dev);
369 ei_outb_p(ENISR_ALL, e8390_base + EN0_IMR);
370 spin_unlock(&ei_local->page_lock);
371 enable_irq_lockdep_irqrestore(dev->irq, &flags);
Paulius Zaleckas244d74f2008-05-07 02:20:40 +0300372 dev->stats.tx_errors++;
Al Viro6c3561b2006-10-10 00:19:36 +0100373 return 1;
374 }
375
376 /*
377 * Okay, now upload the packet and trigger a send if the transmitter
378 * isn't already sending. If it is busy, the interrupt handler will
379 * trigger the send later, upon receiving a Tx done interrupt.
380 */
381
382 ei_block_output(dev, send_length, data, output_page);
383
384 if (! ei_local->txing)
385 {
386 ei_local->txing = 1;
387 NS8390_trigger_send(dev, send_length, output_page);
388 dev->trans_start = jiffies;
389 if (output_page == ei_local->tx_start_page)
390 {
391 ei_local->tx1 = -1;
392 ei_local->lasttx = -1;
393 }
394 else
395 {
396 ei_local->tx2 = -1;
397 ei_local->lasttx = -2;
398 }
399 }
400 else ei_local->txqueue++;
401
402 if (ei_local->tx1 && ei_local->tx2)
403 netif_stop_queue(dev);
404 else
405 netif_start_queue(dev);
406
407 /* Turn 8390 interrupts back on. */
408 ei_local->irqlock = 0;
409 ei_outb_p(ENISR_ALL, e8390_base + EN0_IMR);
410
411 spin_unlock(&ei_local->page_lock);
412 enable_irq_lockdep_irqrestore(dev->irq, &flags);
413
414 dev_kfree_skb (skb);
Paulius Zaleckas244d74f2008-05-07 02:20:40 +0300415 dev->stats.tx_bytes += send_length;
Al Viro6c3561b2006-10-10 00:19:36 +0100416
417 return 0;
418}
419
420/**
421 * ei_interrupt - handle the interrupts from an 8390
422 * @irq: interrupt number
423 * @dev_id: a pointer to the net_device
424 *
425 * Handle the ether interface interrupts. We pull packets from
426 * the 8390 via the card specific functions and fire them at the networking
427 * stack. We also handle transmit completions and wake the transmit path if
428 * necessary. We also update the counters and do other housekeeping as
429 * needed.
430 */
431
432static irqreturn_t __ei_interrupt(int irq, void *dev_id)
433{
434 struct net_device *dev = dev_id;
435 unsigned long e8390_base = dev->base_addr;
436 int interrupts, nr_serviced = 0;
437 struct ei_device *ei_local = netdev_priv(dev);
438
439 /*
440 * Protect the irq test too.
441 */
442
443 spin_lock(&ei_local->page_lock);
444
445 if (ei_local->irqlock)
446 {
447#if 1 /* This might just be an interrupt for a PCI device sharing this line */
448 /* The "irqlock" check is only for testing. */
449 printk(ei_local->irqlock
450 ? "%s: Interrupted while interrupts are masked! isr=%#2x imr=%#2x.\n"
451 : "%s: Reentering the interrupt handler! isr=%#2x imr=%#2x.\n",
452 dev->name, ei_inb_p(e8390_base + EN0_ISR),
453 ei_inb_p(e8390_base + EN0_IMR));
454#endif
455 spin_unlock(&ei_local->page_lock);
456 return IRQ_NONE;
457 }
458
459 /* Change to page 0 and read the intr status reg. */
460 ei_outb_p(E8390_NODMA+E8390_PAGE0, e8390_base + E8390_CMD);
461 if (ei_debug > 3)
462 printk(KERN_DEBUG "%s: interrupt(isr=%#2.2x).\n", dev->name,
463 ei_inb_p(e8390_base + EN0_ISR));
464
465 /* !!Assumption!! -- we stay in page 0. Don't break this. */
466 while ((interrupts = ei_inb_p(e8390_base + EN0_ISR)) != 0
467 && ++nr_serviced < MAX_SERVICE)
468 {
469 if (!netif_running(dev)) {
470 printk(KERN_WARNING "%s: interrupt from stopped card\n", dev->name);
471 /* rmk - acknowledge the interrupts */
472 ei_outb_p(interrupts, e8390_base + EN0_ISR);
473 interrupts = 0;
474 break;
475 }
476 if (interrupts & ENISR_OVER)
477 ei_rx_overrun(dev);
478 else if (interrupts & (ENISR_RX+ENISR_RX_ERR))
479 {
480 /* Got a good (?) packet. */
481 ei_receive(dev);
482 }
483 /* Push the next to-transmit packet through. */
484 if (interrupts & ENISR_TX)
485 ei_tx_intr(dev);
486 else if (interrupts & ENISR_TX_ERR)
487 ei_tx_err(dev);
488
489 if (interrupts & ENISR_COUNTERS)
490 {
Paulius Zaleckas244d74f2008-05-07 02:20:40 +0300491 dev->stats.rx_frame_errors += ei_inb_p(e8390_base + EN0_COUNTER0);
492 dev->stats.rx_crc_errors += ei_inb_p(e8390_base + EN0_COUNTER1);
493 dev->stats.rx_missed_errors+= ei_inb_p(e8390_base + EN0_COUNTER2);
Al Viro6c3561b2006-10-10 00:19:36 +0100494 ei_outb_p(ENISR_COUNTERS, e8390_base + EN0_ISR); /* Ack intr. */
495 }
496
497 /* Ignore any RDC interrupts that make it back to here. */
498 if (interrupts & ENISR_RDC)
499 {
500 ei_outb_p(ENISR_RDC, e8390_base + EN0_ISR);
501 }
502
503 ei_outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, e8390_base + E8390_CMD);
504 }
505
506 if (interrupts && ei_debug)
507 {
508 ei_outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, e8390_base + E8390_CMD);
509 if (nr_serviced >= MAX_SERVICE)
510 {
511 /* 0xFF is valid for a card removal */
512 if(interrupts!=0xFF)
513 printk(KERN_WARNING "%s: Too much work at interrupt, status %#2.2x\n",
514 dev->name, interrupts);
515 ei_outb_p(ENISR_ALL, e8390_base + EN0_ISR); /* Ack. most intrs. */
516 } else {
517 printk(KERN_WARNING "%s: unknown interrupt %#2x\n", dev->name, interrupts);
518 ei_outb_p(0xff, e8390_base + EN0_ISR); /* Ack. all intrs. */
519 }
520 }
521 spin_unlock(&ei_local->page_lock);
522 return IRQ_RETVAL(nr_serviced > 0);
523}
524
525#ifdef CONFIG_NET_POLL_CONTROLLER
526static void __ei_poll(struct net_device *dev)
527{
Jarek Poplawskif47aeff2008-09-30 20:58:25 +0000528 disable_irq(dev->irq);
Al Viro6c3561b2006-10-10 00:19:36 +0100529 __ei_interrupt(dev->irq, dev);
Jarek Poplawskif47aeff2008-09-30 20:58:25 +0000530 enable_irq(dev->irq);
Al Viro6c3561b2006-10-10 00:19:36 +0100531}
532#endif
533
534/**
535 * ei_tx_err - handle transmitter error
536 * @dev: network device which threw the exception
537 *
538 * A transmitter error has happened. Most likely excess collisions (which
539 * is a fairly normal condition). If the error is one where the Tx will
540 * have been aborted, we try and send another one right away, instead of
541 * letting the failed packet sit and collect dust in the Tx buffer. This
542 * is a much better solution as it avoids kernel based Tx timeouts, and
543 * an unnecessary card reset.
544 *
545 * Called with lock held.
546 */
547
548static void ei_tx_err(struct net_device *dev)
549{
550 unsigned long e8390_base = dev->base_addr;
Stephen Rothwell0c1aa202008-05-29 22:39:28 +1000551 /* ei_local is used on some platforms via the EI_SHIFT macro */
552 struct ei_device *ei_local __maybe_unused = netdev_priv(dev);
Al Viro6c3561b2006-10-10 00:19:36 +0100553 unsigned char txsr = ei_inb_p(e8390_base+EN0_TSR);
554 unsigned char tx_was_aborted = txsr & (ENTSR_ABT+ENTSR_FU);
555
556#ifdef VERBOSE_ERROR_DUMP
557 printk(KERN_DEBUG "%s: transmitter error (%#2x): ", dev->name, txsr);
558 if (txsr & ENTSR_ABT)
559 printk("excess-collisions ");
560 if (txsr & ENTSR_ND)
561 printk("non-deferral ");
562 if (txsr & ENTSR_CRS)
563 printk("lost-carrier ");
564 if (txsr & ENTSR_FU)
565 printk("FIFO-underrun ");
566 if (txsr & ENTSR_CDH)
567 printk("lost-heartbeat ");
568 printk("\n");
569#endif
570
571 ei_outb_p(ENISR_TX_ERR, e8390_base + EN0_ISR); /* Ack intr. */
572
573 if (tx_was_aborted)
574 ei_tx_intr(dev);
575 else
576 {
Paulius Zaleckas244d74f2008-05-07 02:20:40 +0300577 dev->stats.tx_errors++;
578 if (txsr & ENTSR_CRS) dev->stats.tx_carrier_errors++;
579 if (txsr & ENTSR_CDH) dev->stats.tx_heartbeat_errors++;
580 if (txsr & ENTSR_OWC) dev->stats.tx_window_errors++;
Al Viro6c3561b2006-10-10 00:19:36 +0100581 }
582}
583
584/**
585 * ei_tx_intr - transmit interrupt handler
586 * @dev: network device for which tx intr is handled
587 *
588 * We have finished a transmit: check for errors and then trigger the next
589 * packet to be sent. Called with lock held.
590 */
591
592static void ei_tx_intr(struct net_device *dev)
593{
594 unsigned long e8390_base = dev->base_addr;
595 struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
596 int status = ei_inb(e8390_base + EN0_TSR);
597
598 ei_outb_p(ENISR_TX, e8390_base + EN0_ISR); /* Ack intr. */
599
600 /*
601 * There are two Tx buffers, see which one finished, and trigger
602 * the send of another one if it exists.
603 */
604 ei_local->txqueue--;
605
606 if (ei_local->tx1 < 0)
607 {
608 if (ei_local->lasttx != 1 && ei_local->lasttx != -1)
609 printk(KERN_ERR "%s: bogus last_tx_buffer %d, tx1=%d.\n",
610 ei_local->name, ei_local->lasttx, ei_local->tx1);
611 ei_local->tx1 = 0;
612 if (ei_local->tx2 > 0)
613 {
614 ei_local->txing = 1;
615 NS8390_trigger_send(dev, ei_local->tx2, ei_local->tx_start_page + 6);
616 dev->trans_start = jiffies;
617 ei_local->tx2 = -1,
618 ei_local->lasttx = 2;
619 }
620 else ei_local->lasttx = 20, ei_local->txing = 0;
621 }
622 else if (ei_local->tx2 < 0)
623 {
624 if (ei_local->lasttx != 2 && ei_local->lasttx != -2)
625 printk("%s: bogus last_tx_buffer %d, tx2=%d.\n",
626 ei_local->name, ei_local->lasttx, ei_local->tx2);
627 ei_local->tx2 = 0;
628 if (ei_local->tx1 > 0)
629 {
630 ei_local->txing = 1;
631 NS8390_trigger_send(dev, ei_local->tx1, ei_local->tx_start_page);
632 dev->trans_start = jiffies;
633 ei_local->tx1 = -1;
634 ei_local->lasttx = 1;
635 }
636 else
637 ei_local->lasttx = 10, ei_local->txing = 0;
638 }
639// else printk(KERN_WARNING "%s: unexpected TX-done interrupt, lasttx=%d.\n",
640// dev->name, ei_local->lasttx);
641
642 /* Minimize Tx latency: update the statistics after we restart TXing. */
643 if (status & ENTSR_COL)
Paulius Zaleckas244d74f2008-05-07 02:20:40 +0300644 dev->stats.collisions++;
Al Viro6c3561b2006-10-10 00:19:36 +0100645 if (status & ENTSR_PTX)
Paulius Zaleckas244d74f2008-05-07 02:20:40 +0300646 dev->stats.tx_packets++;
Al Viro6c3561b2006-10-10 00:19:36 +0100647 else
648 {
Paulius Zaleckas244d74f2008-05-07 02:20:40 +0300649 dev->stats.tx_errors++;
Al Viro6c3561b2006-10-10 00:19:36 +0100650 if (status & ENTSR_ABT)
651 {
Paulius Zaleckas244d74f2008-05-07 02:20:40 +0300652 dev->stats.tx_aborted_errors++;
653 dev->stats.collisions += 16;
Al Viro6c3561b2006-10-10 00:19:36 +0100654 }
655 if (status & ENTSR_CRS)
Paulius Zaleckas244d74f2008-05-07 02:20:40 +0300656 dev->stats.tx_carrier_errors++;
Al Viro6c3561b2006-10-10 00:19:36 +0100657 if (status & ENTSR_FU)
Paulius Zaleckas244d74f2008-05-07 02:20:40 +0300658 dev->stats.tx_fifo_errors++;
Al Viro6c3561b2006-10-10 00:19:36 +0100659 if (status & ENTSR_CDH)
Paulius Zaleckas244d74f2008-05-07 02:20:40 +0300660 dev->stats.tx_heartbeat_errors++;
Al Viro6c3561b2006-10-10 00:19:36 +0100661 if (status & ENTSR_OWC)
Paulius Zaleckas244d74f2008-05-07 02:20:40 +0300662 dev->stats.tx_window_errors++;
Al Viro6c3561b2006-10-10 00:19:36 +0100663 }
664 netif_wake_queue(dev);
665}
666
667/**
668 * ei_receive - receive some packets
669 * @dev: network device with which receive will be run
670 *
671 * We have a good packet(s), get it/them out of the buffers.
672 * Called with lock held.
673 */
674
675static void ei_receive(struct net_device *dev)
676{
677 unsigned long e8390_base = dev->base_addr;
678 struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
679 unsigned char rxing_page, this_frame, next_frame;
680 unsigned short current_offset;
681 int rx_pkt_count = 0;
682 struct e8390_pkt_hdr rx_frame;
683 int num_rx_pages = ei_local->stop_page-ei_local->rx_start_page;
684
685 while (++rx_pkt_count < 10)
686 {
687 int pkt_len, pkt_stat;
688
689 /* Get the rx page (incoming packet pointer). */
690 ei_outb_p(E8390_NODMA+E8390_PAGE1, e8390_base + E8390_CMD);
691 rxing_page = ei_inb_p(e8390_base + EN1_CURPAG);
692 ei_outb_p(E8390_NODMA+E8390_PAGE0, e8390_base + E8390_CMD);
693
694 /* Remove one frame from the ring. Boundary is always a page behind. */
695 this_frame = ei_inb_p(e8390_base + EN0_BOUNDARY) + 1;
696 if (this_frame >= ei_local->stop_page)
697 this_frame = ei_local->rx_start_page;
698
699 /* Someday we'll omit the previous, iff we never get this message.
700 (There is at least one clone claimed to have a problem.)
701
702 Keep quiet if it looks like a card removal. One problem here
703 is that some clones crash in roughly the same way.
704 */
705 if (ei_debug > 0 && this_frame != ei_local->current_page && (this_frame!=0x0 || rxing_page!=0xFF))
706 printk(KERN_ERR "%s: mismatched read page pointers %2x vs %2x.\n",
707 dev->name, this_frame, ei_local->current_page);
708
709 if (this_frame == rxing_page) /* Read all the frames? */
710 break; /* Done for now */
711
712 current_offset = this_frame << 8;
713 ei_get_8390_hdr(dev, &rx_frame, this_frame);
714
715 pkt_len = rx_frame.count - sizeof(struct e8390_pkt_hdr);
716 pkt_stat = rx_frame.status;
717
718 next_frame = this_frame + 1 + ((pkt_len+4)>>8);
719
720 /* Check for bogosity warned by 3c503 book: the status byte is never
721 written. This happened a lot during testing! This code should be
722 cleaned up someday. */
723 if (rx_frame.next != next_frame
724 && rx_frame.next != next_frame + 1
725 && rx_frame.next != next_frame - num_rx_pages
726 && rx_frame.next != next_frame + 1 - num_rx_pages) {
727 ei_local->current_page = rxing_page;
728 ei_outb(ei_local->current_page-1, e8390_base+EN0_BOUNDARY);
Paulius Zaleckas244d74f2008-05-07 02:20:40 +0300729 dev->stats.rx_errors++;
Al Viro6c3561b2006-10-10 00:19:36 +0100730 continue;
731 }
732
733 if (pkt_len < 60 || pkt_len > 1518)
734 {
735 if (ei_debug)
736 printk(KERN_DEBUG "%s: bogus packet size: %d, status=%#2x nxpg=%#2x.\n",
737 dev->name, rx_frame.count, rx_frame.status,
738 rx_frame.next);
Paulius Zaleckas244d74f2008-05-07 02:20:40 +0300739 dev->stats.rx_errors++;
740 dev->stats.rx_length_errors++;
Al Viro6c3561b2006-10-10 00:19:36 +0100741 }
742 else if ((pkt_stat & 0x0F) == ENRSR_RXOK)
743 {
744 struct sk_buff *skb;
745
746 skb = dev_alloc_skb(pkt_len+2);
747 if (skb == NULL)
748 {
749 if (ei_debug > 1)
750 printk(KERN_DEBUG "%s: Couldn't allocate a sk_buff of size %d.\n",
751 dev->name, pkt_len);
Paulius Zaleckas244d74f2008-05-07 02:20:40 +0300752 dev->stats.rx_dropped++;
Al Viro6c3561b2006-10-10 00:19:36 +0100753 break;
754 }
755 else
756 {
757 skb_reserve(skb,2); /* IP headers on 16 byte boundaries */
Al Viro6c3561b2006-10-10 00:19:36 +0100758 skb_put(skb, pkt_len); /* Make room */
759 ei_block_input(dev, pkt_len, skb, current_offset + sizeof(rx_frame));
760 skb->protocol=eth_type_trans(skb,dev);
761 netif_rx(skb);
Paulius Zaleckas244d74f2008-05-07 02:20:40 +0300762 dev->stats.rx_packets++;
763 dev->stats.rx_bytes += pkt_len;
Al Viro6c3561b2006-10-10 00:19:36 +0100764 if (pkt_stat & ENRSR_PHY)
Paulius Zaleckas244d74f2008-05-07 02:20:40 +0300765 dev->stats.multicast++;
Al Viro6c3561b2006-10-10 00:19:36 +0100766 }
767 }
768 else
769 {
770 if (ei_debug)
771 printk(KERN_DEBUG "%s: bogus packet: status=%#2x nxpg=%#2x size=%d\n",
772 dev->name, rx_frame.status, rx_frame.next,
773 rx_frame.count);
Paulius Zaleckas244d74f2008-05-07 02:20:40 +0300774 dev->stats.rx_errors++;
Al Viro6c3561b2006-10-10 00:19:36 +0100775 /* NB: The NIC counts CRC, frame and missed errors. */
776 if (pkt_stat & ENRSR_FO)
Paulius Zaleckas244d74f2008-05-07 02:20:40 +0300777 dev->stats.rx_fifo_errors++;
Al Viro6c3561b2006-10-10 00:19:36 +0100778 }
779 next_frame = rx_frame.next;
780
781 /* This _should_ never happen: it's here for avoiding bad clones. */
782 if (next_frame >= ei_local->stop_page) {
783 printk("%s: next frame inconsistency, %#2x\n", dev->name,
784 next_frame);
785 next_frame = ei_local->rx_start_page;
786 }
787 ei_local->current_page = next_frame;
788 ei_outb_p(next_frame-1, e8390_base+EN0_BOUNDARY);
789 }
790
791 /* We used to also ack ENISR_OVER here, but that would sometimes mask
792 a real overrun, leaving the 8390 in a stopped state with rec'vr off. */
793 ei_outb_p(ENISR_RX+ENISR_RX_ERR, e8390_base+EN0_ISR);
794 return;
795}
796
797/**
798 * ei_rx_overrun - handle receiver overrun
799 * @dev: network device which threw exception
800 *
801 * We have a receiver overrun: we have to kick the 8390 to get it started
802 * again. Problem is that you have to kick it exactly as NS prescribes in
803 * the updated datasheets, or "the NIC may act in an unpredictable manner."
804 * This includes causing "the NIC to defer indefinitely when it is stopped
805 * on a busy network." Ugh.
806 * Called with lock held. Don't call this with the interrupts off or your
807 * computer will hate you - it takes 10ms or so.
808 */
809
810static void ei_rx_overrun(struct net_device *dev)
811{
812 unsigned long e8390_base = dev->base_addr;
813 unsigned char was_txing, must_resend = 0;
Stephen Rothwell0c1aa202008-05-29 22:39:28 +1000814 /* ei_local is used on some platforms via the EI_SHIFT macro */
815 struct ei_device *ei_local __maybe_unused = netdev_priv(dev);
Al Viro6c3561b2006-10-10 00:19:36 +0100816
817 /*
818 * Record whether a Tx was in progress and then issue the
819 * stop command.
820 */
821 was_txing = ei_inb_p(e8390_base+E8390_CMD) & E8390_TRANS;
822 ei_outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base+E8390_CMD);
823
824 if (ei_debug > 1)
825 printk(KERN_DEBUG "%s: Receiver overrun.\n", dev->name);
Paulius Zaleckas244d74f2008-05-07 02:20:40 +0300826 dev->stats.rx_over_errors++;
Al Viro6c3561b2006-10-10 00:19:36 +0100827
828 /*
829 * Wait a full Tx time (1.2ms) + some guard time, NS says 1.6ms total.
830 * Early datasheets said to poll the reset bit, but now they say that
831 * it "is not a reliable indicator and subsequently should be ignored."
832 * We wait at least 10ms.
833 */
834
835 mdelay(10);
836
837 /*
838 * Reset RBCR[01] back to zero as per magic incantation.
839 */
840 ei_outb_p(0x00, e8390_base+EN0_RCNTLO);
841 ei_outb_p(0x00, e8390_base+EN0_RCNTHI);
842
843 /*
844 * See if any Tx was interrupted or not. According to NS, this
845 * step is vital, and skipping it will cause no end of havoc.
846 */
847
848 if (was_txing)
849 {
850 unsigned char tx_completed = ei_inb_p(e8390_base+EN0_ISR) & (ENISR_TX+ENISR_TX_ERR);
851 if (!tx_completed)
852 must_resend = 1;
853 }
854
855 /*
856 * Have to enter loopback mode and then restart the NIC before
857 * you are allowed to slurp packets up off the ring.
858 */
859 ei_outb_p(E8390_TXOFF, e8390_base + EN0_TXCR);
860 ei_outb_p(E8390_NODMA + E8390_PAGE0 + E8390_START, e8390_base + E8390_CMD);
861
862 /*
863 * Clear the Rx ring of all the debris, and ack the interrupt.
864 */
865 ei_receive(dev);
866 ei_outb_p(ENISR_OVER, e8390_base+EN0_ISR);
867
868 /*
869 * Leave loopback mode, and resend any packet that got stopped.
870 */
871 ei_outb_p(E8390_TXCONFIG, e8390_base + EN0_TXCR);
872 if (must_resend)
873 ei_outb_p(E8390_NODMA + E8390_PAGE0 + E8390_START + E8390_TRANS, e8390_base + E8390_CMD);
874}
875
876/*
877 * Collect the stats. This is called unlocked and from several contexts.
878 */
879
Stephen Hemminger8884c092008-11-25 18:12:49 -0800880static struct net_device_stats *__ei_get_stats(struct net_device *dev)
Al Viro6c3561b2006-10-10 00:19:36 +0100881{
882 unsigned long ioaddr = dev->base_addr;
883 struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
884 unsigned long flags;
885
886 /* If the card is stopped, just return the present stats. */
887 if (!netif_running(dev))
Paulius Zaleckas244d74f2008-05-07 02:20:40 +0300888 return &dev->stats;
Al Viro6c3561b2006-10-10 00:19:36 +0100889
890 spin_lock_irqsave(&ei_local->page_lock,flags);
891 /* Read the counter registers, assuming we are in page 0. */
Paulius Zaleckas244d74f2008-05-07 02:20:40 +0300892 dev->stats.rx_frame_errors += ei_inb_p(ioaddr + EN0_COUNTER0);
893 dev->stats.rx_crc_errors += ei_inb_p(ioaddr + EN0_COUNTER1);
894 dev->stats.rx_missed_errors+= ei_inb_p(ioaddr + EN0_COUNTER2);
Al Viro6c3561b2006-10-10 00:19:36 +0100895 spin_unlock_irqrestore(&ei_local->page_lock, flags);
896
Paulius Zaleckas244d74f2008-05-07 02:20:40 +0300897 return &dev->stats;
Al Viro6c3561b2006-10-10 00:19:36 +0100898}
899
900/*
901 * Form the 64 bit 8390 multicast table from the linked list of addresses
902 * associated with this dev structure.
903 */
904
905static inline void make_mc_bits(u8 *bits, struct net_device *dev)
906{
907 struct dev_mc_list *dmi;
908
909 for (dmi=dev->mc_list; dmi; dmi=dmi->next)
910 {
911 u32 crc;
912 if (dmi->dmi_addrlen != ETH_ALEN)
913 {
914 printk(KERN_INFO "%s: invalid multicast address length given.\n", dev->name);
915 continue;
916 }
917 crc = ether_crc(ETH_ALEN, dmi->dmi_addr);
918 /*
919 * The 8390 uses the 6 most significant bits of the
920 * CRC to index the multicast table.
921 */
922 bits[crc>>29] |= (1<<((crc>>26)&7));
923 }
924}
925
926/**
927 * do_set_multicast_list - set/clear multicast filter
928 * @dev: net device for which multicast filter is adjusted
929 *
930 * Set or clear the multicast filter for this adaptor. May be called
931 * from a BH in 2.1.x. Must be called with lock held.
932 */
933
934static void do_set_multicast_list(struct net_device *dev)
935{
936 unsigned long e8390_base = dev->base_addr;
937 int i;
938 struct ei_device *ei_local = (struct ei_device*)netdev_priv(dev);
939
940 if (!(dev->flags&(IFF_PROMISC|IFF_ALLMULTI)))
941 {
942 memset(ei_local->mcfilter, 0, 8);
943 if (dev->mc_list)
944 make_mc_bits(ei_local->mcfilter, dev);
945 }
946 else
947 memset(ei_local->mcfilter, 0xFF, 8); /* mcast set to accept-all */
948
949 /*
950 * DP8390 manuals don't specify any magic sequence for altering
951 * the multicast regs on an already running card. To be safe, we
952 * ensure multicast mode is off prior to loading up the new hash
953 * table. If this proves to be not enough, we can always resort
954 * to stopping the NIC, loading the table and then restarting.
955 *
956 * Bug Alert! The MC regs on the SMC 83C690 (SMC Elite and SMC
957 * Elite16) appear to be write-only. The NS 8390 data sheet lists
958 * them as r/w so this is a bug. The SMC 83C790 (SMC Ultra and
959 * Ultra32 EISA) appears to have this bug fixed.
960 */
961
962 if (netif_running(dev))
963 ei_outb_p(E8390_RXCONFIG, e8390_base + EN0_RXCR);
964 ei_outb_p(E8390_NODMA + E8390_PAGE1, e8390_base + E8390_CMD);
965 for(i = 0; i < 8; i++)
966 {
967 ei_outb_p(ei_local->mcfilter[i], e8390_base + EN1_MULT_SHIFT(i));
968#ifndef BUG_83C690
969 if(ei_inb_p(e8390_base + EN1_MULT_SHIFT(i))!=ei_local->mcfilter[i])
970 printk(KERN_ERR "Multicast filter read/write mismap %d\n",i);
971#endif
972 }
973 ei_outb_p(E8390_NODMA + E8390_PAGE0, e8390_base + E8390_CMD);
974
975 if(dev->flags&IFF_PROMISC)
976 ei_outb_p(E8390_RXCONFIG | 0x18, e8390_base + EN0_RXCR);
977 else if(dev->flags&IFF_ALLMULTI || dev->mc_list)
978 ei_outb_p(E8390_RXCONFIG | 0x08, e8390_base + EN0_RXCR);
979 else
980 ei_outb_p(E8390_RXCONFIG, e8390_base + EN0_RXCR);
981 }
982
983/*
984 * Called without lock held. This is invoked from user context and may
985 * be parallel to just about everything else. Its also fairly quick and
986 * not called too often. Must protect against both bh and irq users
987 */
988
Stephen Hemminger8884c092008-11-25 18:12:49 -0800989static void __ei_set_multicast_list(struct net_device *dev)
Al Viro6c3561b2006-10-10 00:19:36 +0100990{
991 unsigned long flags;
992 struct ei_device *ei_local = (struct ei_device*)netdev_priv(dev);
993
994 spin_lock_irqsave(&ei_local->page_lock, flags);
995 do_set_multicast_list(dev);
996 spin_unlock_irqrestore(&ei_local->page_lock, flags);
997}
998
999/**
1000 * ethdev_setup - init rest of 8390 device struct
1001 * @dev: network device structure to init
1002 *
1003 * Initialize the rest of the 8390 device structure. Do NOT __init
1004 * this, as it is used by 8390 based modular drivers too.
1005 */
1006
1007static void ethdev_setup(struct net_device *dev)
1008{
1009 struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
1010 if (ei_debug > 1)
1011 printk(version);
1012
Al Viro6c3561b2006-10-10 00:19:36 +01001013 ether_setup(dev);
1014
1015 spin_lock_init(&ei_local->page_lock);
1016}
1017
1018/**
1019 * alloc_ei_netdev - alloc_etherdev counterpart for 8390
1020 * @size: extra bytes to allocate
1021 *
1022 * Allocate 8390-specific net_device.
1023 */
1024static struct net_device *____alloc_ei_netdev(int size)
1025{
1026 return alloc_netdev(sizeof(struct ei_device) + size, "eth%d",
1027 ethdev_setup);
1028}
1029
1030
1031
1032
1033/* This page of functions should be 8390 generic */
1034/* Follow National Semi's recommendations for initializing the "NIC". */
1035
1036/**
1037 * NS8390_init - initialize 8390 hardware
1038 * @dev: network device to initialize
1039 * @startp: boolean. non-zero value to initiate chip processing
1040 *
1041 * Must be called with lock held.
1042 */
1043
1044static void __NS8390_init(struct net_device *dev, int startp)
1045{
1046 unsigned long e8390_base = dev->base_addr;
1047 struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
1048 int i;
1049 int endcfg = ei_local->word16
1050 ? (0x48 | ENDCFG_WTS | (ei_local->bigendian ? ENDCFG_BOS : 0))
1051 : 0x48;
1052
1053 if(sizeof(struct e8390_pkt_hdr)!=4)
1054 panic("8390.c: header struct mispacked\n");
1055 /* Follow National Semi's recommendations for initing the DP83902. */
1056 ei_outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base+E8390_CMD); /* 0x21 */
1057 ei_outb_p(endcfg, e8390_base + EN0_DCFG); /* 0x48 or 0x49 */
1058 /* Clear the remote byte count registers. */
1059 ei_outb_p(0x00, e8390_base + EN0_RCNTLO);
1060 ei_outb_p(0x00, e8390_base + EN0_RCNTHI);
1061 /* Set to monitor and loopback mode -- this is vital!. */
1062 ei_outb_p(E8390_RXOFF, e8390_base + EN0_RXCR); /* 0x20 */
1063 ei_outb_p(E8390_TXOFF, e8390_base + EN0_TXCR); /* 0x02 */
1064 /* Set the transmit page and receive ring. */
1065 ei_outb_p(ei_local->tx_start_page, e8390_base + EN0_TPSR);
1066 ei_local->tx1 = ei_local->tx2 = 0;
1067 ei_outb_p(ei_local->rx_start_page, e8390_base + EN0_STARTPG);
1068 ei_outb_p(ei_local->stop_page-1, e8390_base + EN0_BOUNDARY); /* 3c503 says 0x3f,NS0x26*/
1069 ei_local->current_page = ei_local->rx_start_page; /* assert boundary+1 */
1070 ei_outb_p(ei_local->stop_page, e8390_base + EN0_STOPPG);
1071 /* Clear the pending interrupts and mask. */
1072 ei_outb_p(0xFF, e8390_base + EN0_ISR);
1073 ei_outb_p(0x00, e8390_base + EN0_IMR);
1074
1075 /* Copy the station address into the DS8390 registers. */
1076
1077 ei_outb_p(E8390_NODMA + E8390_PAGE1 + E8390_STOP, e8390_base+E8390_CMD); /* 0x61 */
1078 for(i = 0; i < 6; i++)
1079 {
1080 ei_outb_p(dev->dev_addr[i], e8390_base + EN1_PHYS_SHIFT(i));
1081 if (ei_debug > 1 && ei_inb_p(e8390_base + EN1_PHYS_SHIFT(i))!=dev->dev_addr[i])
1082 printk(KERN_ERR "Hw. address read/write mismap %d\n",i);
1083 }
1084
1085 ei_outb_p(ei_local->rx_start_page, e8390_base + EN1_CURPAG);
1086 ei_outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base+E8390_CMD);
1087
1088 netif_start_queue(dev);
1089 ei_local->tx1 = ei_local->tx2 = 0;
1090 ei_local->txing = 0;
1091
1092 if (startp)
1093 {
1094 ei_outb_p(0xff, e8390_base + EN0_ISR);
1095 ei_outb_p(ENISR_ALL, e8390_base + EN0_IMR);
1096 ei_outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, e8390_base+E8390_CMD);
1097 ei_outb_p(E8390_TXCONFIG, e8390_base + EN0_TXCR); /* xmit on. */
1098 /* 3c503 TechMan says rxconfig only after the NIC is started. */
1099 ei_outb_p(E8390_RXCONFIG, e8390_base + EN0_RXCR); /* rx on, */
1100 do_set_multicast_list(dev); /* (re)load the mcast table */
1101 }
1102}
1103
1104/* Trigger a transmit start, assuming the length is valid.
1105 Always called with the page lock held */
1106
1107static void NS8390_trigger_send(struct net_device *dev, unsigned int length,
1108 int start_page)
1109{
1110 unsigned long e8390_base = dev->base_addr;
1111 struct ei_device *ei_local __attribute((unused)) = (struct ei_device *) netdev_priv(dev);
1112
1113 ei_outb_p(E8390_NODMA+E8390_PAGE0, e8390_base+E8390_CMD);
1114
1115 if (ei_inb_p(e8390_base + E8390_CMD) & E8390_TRANS)
1116 {
1117 printk(KERN_WARNING "%s: trigger_send() called with the transmitter busy.\n",
1118 dev->name);
1119 return;
1120 }
1121 ei_outb_p(length & 0xff, e8390_base + EN0_TCNTLO);
1122 ei_outb_p(length >> 8, e8390_base + EN0_TCNTHI);
1123 ei_outb_p(start_page, e8390_base + EN0_TPSR);
1124 ei_outb_p(E8390_NODMA+E8390_TRANS+E8390_START, e8390_base+E8390_CMD);
1125}