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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 Hemminger613573252009-08-31 19:50:58 +0000302static netdev_tx_t __ei_start_xmit(struct sk_buff *skb,
303 struct net_device *dev)
Al Viro6c3561b2006-10-10 00:19:36 +0100304{
305 unsigned long e8390_base = dev->base_addr;
306 struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
307 int send_length = skb->len, output_page;
308 unsigned long flags;
309 char buf[ETH_ZLEN];
310 char *data = skb->data;
311
312 if (skb->len < ETH_ZLEN) {
313 memset(buf, 0, ETH_ZLEN); /* more efficient than doing just the needed bits */
314 memcpy(buf, data, skb->len);
315 send_length = ETH_ZLEN;
316 data = buf;
317 }
318
319 /* Mask interrupts from the ethercard.
320 SMP: We have to grab the lock here otherwise the IRQ handler
321 on another CPU can flip window and race the IRQ mask set. We end
322 up trashing the mcast filter not disabling irqs if we don't lock */
323
324 spin_lock_irqsave(&ei_local->page_lock, flags);
325 ei_outb_p(0x00, e8390_base + EN0_IMR);
326 spin_unlock_irqrestore(&ei_local->page_lock, flags);
327
328
329 /*
330 * Slow phase with lock held.
331 */
332
333 disable_irq_nosync_lockdep_irqsave(dev->irq, &flags);
334
335 spin_lock(&ei_local->page_lock);
336
337 ei_local->irqlock = 1;
338
339 /*
340 * We have two Tx slots available for use. Find the first free
341 * slot, and then perform some sanity checks. With two Tx bufs,
342 * you get very close to transmitting back-to-back packets. With
343 * only one Tx buf, the transmitter sits idle while you reload the
344 * card, leaving a substantial gap between each transmitted packet.
345 */
346
347 if (ei_local->tx1 == 0)
348 {
349 output_page = ei_local->tx_start_page;
350 ei_local->tx1 = send_length;
351 if (ei_debug && ei_local->tx2 > 0)
352 printk(KERN_DEBUG "%s: idle transmitter tx2=%d, lasttx=%d, txing=%d.\n",
353 dev->name, ei_local->tx2, ei_local->lasttx, ei_local->txing);
354 }
355 else if (ei_local->tx2 == 0)
356 {
357 output_page = ei_local->tx_start_page + TX_PAGES/2;
358 ei_local->tx2 = send_length;
359 if (ei_debug && ei_local->tx1 > 0)
360 printk(KERN_DEBUG "%s: idle transmitter, tx1=%d, lasttx=%d, txing=%d.\n",
361 dev->name, ei_local->tx1, ei_local->lasttx, ei_local->txing);
362 }
363 else
364 { /* We should never get here. */
365 if (ei_debug)
366 printk(KERN_DEBUG "%s: No Tx buffers free! tx1=%d tx2=%d last=%d\n",
367 dev->name, ei_local->tx1, ei_local->tx2, ei_local->lasttx);
368 ei_local->irqlock = 0;
369 netif_stop_queue(dev);
370 ei_outb_p(ENISR_ALL, e8390_base + EN0_IMR);
371 spin_unlock(&ei_local->page_lock);
372 enable_irq_lockdep_irqrestore(dev->irq, &flags);
Paulius Zaleckas244d74f2008-05-07 02:20:40 +0300373 dev->stats.tx_errors++;
Patrick McHardy5b548142009-06-12 06:22:29 +0000374 return NETDEV_TX_BUSY;
Al Viro6c3561b2006-10-10 00:19:36 +0100375 }
376
377 /*
378 * Okay, now upload the packet and trigger a send if the transmitter
379 * isn't already sending. If it is busy, the interrupt handler will
380 * trigger the send later, upon receiving a Tx done interrupt.
381 */
382
383 ei_block_output(dev, send_length, data, output_page);
384
385 if (! ei_local->txing)
386 {
387 ei_local->txing = 1;
388 NS8390_trigger_send(dev, send_length, output_page);
389 dev->trans_start = jiffies;
390 if (output_page == ei_local->tx_start_page)
391 {
392 ei_local->tx1 = -1;
393 ei_local->lasttx = -1;
394 }
395 else
396 {
397 ei_local->tx2 = -1;
398 ei_local->lasttx = -2;
399 }
400 }
401 else ei_local->txqueue++;
402
403 if (ei_local->tx1 && ei_local->tx2)
404 netif_stop_queue(dev);
405 else
406 netif_start_queue(dev);
407
408 /* Turn 8390 interrupts back on. */
409 ei_local->irqlock = 0;
410 ei_outb_p(ENISR_ALL, e8390_base + EN0_IMR);
411
412 spin_unlock(&ei_local->page_lock);
413 enable_irq_lockdep_irqrestore(dev->irq, &flags);
414
415 dev_kfree_skb (skb);
Paulius Zaleckas244d74f2008-05-07 02:20:40 +0300416 dev->stats.tx_bytes += send_length;
Al Viro6c3561b2006-10-10 00:19:36 +0100417
Patrick McHardyec634fe2009-07-05 19:23:38 -0700418 return NETDEV_TX_OK;
Al Viro6c3561b2006-10-10 00:19:36 +0100419}
420
421/**
422 * ei_interrupt - handle the interrupts from an 8390
423 * @irq: interrupt number
424 * @dev_id: a pointer to the net_device
425 *
426 * Handle the ether interface interrupts. We pull packets from
427 * the 8390 via the card specific functions and fire them at the networking
428 * stack. We also handle transmit completions and wake the transmit path if
429 * necessary. We also update the counters and do other housekeeping as
430 * needed.
431 */
432
433static irqreturn_t __ei_interrupt(int irq, void *dev_id)
434{
435 struct net_device *dev = dev_id;
436 unsigned long e8390_base = dev->base_addr;
437 int interrupts, nr_serviced = 0;
438 struct ei_device *ei_local = netdev_priv(dev);
439
440 /*
441 * Protect the irq test too.
442 */
443
444 spin_lock(&ei_local->page_lock);
445
446 if (ei_local->irqlock)
447 {
448#if 1 /* This might just be an interrupt for a PCI device sharing this line */
449 /* The "irqlock" check is only for testing. */
450 printk(ei_local->irqlock
451 ? "%s: Interrupted while interrupts are masked! isr=%#2x imr=%#2x.\n"
452 : "%s: Reentering the interrupt handler! isr=%#2x imr=%#2x.\n",
453 dev->name, ei_inb_p(e8390_base + EN0_ISR),
454 ei_inb_p(e8390_base + EN0_IMR));
455#endif
456 spin_unlock(&ei_local->page_lock);
457 return IRQ_NONE;
458 }
459
460 /* Change to page 0 and read the intr status reg. */
461 ei_outb_p(E8390_NODMA+E8390_PAGE0, e8390_base + E8390_CMD);
462 if (ei_debug > 3)
463 printk(KERN_DEBUG "%s: interrupt(isr=%#2.2x).\n", dev->name,
464 ei_inb_p(e8390_base + EN0_ISR));
465
466 /* !!Assumption!! -- we stay in page 0. Don't break this. */
Joe Perches8e95a202009-12-03 07:58:21 +0000467 while ((interrupts = ei_inb_p(e8390_base + EN0_ISR)) != 0 &&
468 ++nr_serviced < MAX_SERVICE)
Al Viro6c3561b2006-10-10 00:19:36 +0100469 {
470 if (!netif_running(dev)) {
471 printk(KERN_WARNING "%s: interrupt from stopped card\n", dev->name);
472 /* rmk - acknowledge the interrupts */
473 ei_outb_p(interrupts, e8390_base + EN0_ISR);
474 interrupts = 0;
475 break;
476 }
477 if (interrupts & ENISR_OVER)
478 ei_rx_overrun(dev);
479 else if (interrupts & (ENISR_RX+ENISR_RX_ERR))
480 {
481 /* Got a good (?) packet. */
482 ei_receive(dev);
483 }
484 /* Push the next to-transmit packet through. */
485 if (interrupts & ENISR_TX)
486 ei_tx_intr(dev);
487 else if (interrupts & ENISR_TX_ERR)
488 ei_tx_err(dev);
489
490 if (interrupts & ENISR_COUNTERS)
491 {
Paulius Zaleckas244d74f2008-05-07 02:20:40 +0300492 dev->stats.rx_frame_errors += ei_inb_p(e8390_base + EN0_COUNTER0);
493 dev->stats.rx_crc_errors += ei_inb_p(e8390_base + EN0_COUNTER1);
494 dev->stats.rx_missed_errors+= ei_inb_p(e8390_base + EN0_COUNTER2);
Al Viro6c3561b2006-10-10 00:19:36 +0100495 ei_outb_p(ENISR_COUNTERS, e8390_base + EN0_ISR); /* Ack intr. */
496 }
497
498 /* Ignore any RDC interrupts that make it back to here. */
499 if (interrupts & ENISR_RDC)
500 {
501 ei_outb_p(ENISR_RDC, e8390_base + EN0_ISR);
502 }
503
504 ei_outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, e8390_base + E8390_CMD);
505 }
506
507 if (interrupts && ei_debug)
508 {
509 ei_outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, e8390_base + E8390_CMD);
510 if (nr_serviced >= MAX_SERVICE)
511 {
512 /* 0xFF is valid for a card removal */
513 if(interrupts!=0xFF)
514 printk(KERN_WARNING "%s: Too much work at interrupt, status %#2.2x\n",
515 dev->name, interrupts);
516 ei_outb_p(ENISR_ALL, e8390_base + EN0_ISR); /* Ack. most intrs. */
517 } else {
518 printk(KERN_WARNING "%s: unknown interrupt %#2x\n", dev->name, interrupts);
519 ei_outb_p(0xff, e8390_base + EN0_ISR); /* Ack. all intrs. */
520 }
521 }
522 spin_unlock(&ei_local->page_lock);
523 return IRQ_RETVAL(nr_serviced > 0);
524}
525
526#ifdef CONFIG_NET_POLL_CONTROLLER
527static void __ei_poll(struct net_device *dev)
528{
Jarek Poplawskif47aeff2008-09-30 20:58:25 +0000529 disable_irq(dev->irq);
Al Viro6c3561b2006-10-10 00:19:36 +0100530 __ei_interrupt(dev->irq, dev);
Jarek Poplawskif47aeff2008-09-30 20:58:25 +0000531 enable_irq(dev->irq);
Al Viro6c3561b2006-10-10 00:19:36 +0100532}
533#endif
534
535/**
536 * ei_tx_err - handle transmitter error
537 * @dev: network device which threw the exception
538 *
539 * A transmitter error has happened. Most likely excess collisions (which
540 * is a fairly normal condition). If the error is one where the Tx will
541 * have been aborted, we try and send another one right away, instead of
542 * letting the failed packet sit and collect dust in the Tx buffer. This
543 * is a much better solution as it avoids kernel based Tx timeouts, and
544 * an unnecessary card reset.
545 *
546 * Called with lock held.
547 */
548
549static void ei_tx_err(struct net_device *dev)
550{
551 unsigned long e8390_base = dev->base_addr;
Stephen Rothwell0c1aa202008-05-29 22:39:28 +1000552 /* ei_local is used on some platforms via the EI_SHIFT macro */
553 struct ei_device *ei_local __maybe_unused = netdev_priv(dev);
Al Viro6c3561b2006-10-10 00:19:36 +0100554 unsigned char txsr = ei_inb_p(e8390_base+EN0_TSR);
555 unsigned char tx_was_aborted = txsr & (ENTSR_ABT+ENTSR_FU);
556
557#ifdef VERBOSE_ERROR_DUMP
558 printk(KERN_DEBUG "%s: transmitter error (%#2x): ", dev->name, txsr);
559 if (txsr & ENTSR_ABT)
560 printk("excess-collisions ");
561 if (txsr & ENTSR_ND)
562 printk("non-deferral ");
563 if (txsr & ENTSR_CRS)
564 printk("lost-carrier ");
565 if (txsr & ENTSR_FU)
566 printk("FIFO-underrun ");
567 if (txsr & ENTSR_CDH)
568 printk("lost-heartbeat ");
569 printk("\n");
570#endif
571
572 ei_outb_p(ENISR_TX_ERR, e8390_base + EN0_ISR); /* Ack intr. */
573
574 if (tx_was_aborted)
575 ei_tx_intr(dev);
576 else
577 {
Paulius Zaleckas244d74f2008-05-07 02:20:40 +0300578 dev->stats.tx_errors++;
579 if (txsr & ENTSR_CRS) dev->stats.tx_carrier_errors++;
580 if (txsr & ENTSR_CDH) dev->stats.tx_heartbeat_errors++;
581 if (txsr & ENTSR_OWC) dev->stats.tx_window_errors++;
Al Viro6c3561b2006-10-10 00:19:36 +0100582 }
583}
584
585/**
586 * ei_tx_intr - transmit interrupt handler
587 * @dev: network device for which tx intr is handled
588 *
589 * We have finished a transmit: check for errors and then trigger the next
590 * packet to be sent. Called with lock held.
591 */
592
593static void ei_tx_intr(struct net_device *dev)
594{
595 unsigned long e8390_base = dev->base_addr;
596 struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
597 int status = ei_inb(e8390_base + EN0_TSR);
598
599 ei_outb_p(ENISR_TX, e8390_base + EN0_ISR); /* Ack intr. */
600
601 /*
602 * There are two Tx buffers, see which one finished, and trigger
603 * the send of another one if it exists.
604 */
605 ei_local->txqueue--;
606
607 if (ei_local->tx1 < 0)
608 {
609 if (ei_local->lasttx != 1 && ei_local->lasttx != -1)
610 printk(KERN_ERR "%s: bogus last_tx_buffer %d, tx1=%d.\n",
611 ei_local->name, ei_local->lasttx, ei_local->tx1);
612 ei_local->tx1 = 0;
613 if (ei_local->tx2 > 0)
614 {
615 ei_local->txing = 1;
616 NS8390_trigger_send(dev, ei_local->tx2, ei_local->tx_start_page + 6);
617 dev->trans_start = jiffies;
618 ei_local->tx2 = -1,
619 ei_local->lasttx = 2;
620 }
621 else ei_local->lasttx = 20, ei_local->txing = 0;
622 }
623 else if (ei_local->tx2 < 0)
624 {
625 if (ei_local->lasttx != 2 && ei_local->lasttx != -2)
626 printk("%s: bogus last_tx_buffer %d, tx2=%d.\n",
627 ei_local->name, ei_local->lasttx, ei_local->tx2);
628 ei_local->tx2 = 0;
629 if (ei_local->tx1 > 0)
630 {
631 ei_local->txing = 1;
632 NS8390_trigger_send(dev, ei_local->tx1, ei_local->tx_start_page);
633 dev->trans_start = jiffies;
634 ei_local->tx1 = -1;
635 ei_local->lasttx = 1;
636 }
637 else
638 ei_local->lasttx = 10, ei_local->txing = 0;
639 }
640// else printk(KERN_WARNING "%s: unexpected TX-done interrupt, lasttx=%d.\n",
641// dev->name, ei_local->lasttx);
642
643 /* Minimize Tx latency: update the statistics after we restart TXing. */
644 if (status & ENTSR_COL)
Paulius Zaleckas244d74f2008-05-07 02:20:40 +0300645 dev->stats.collisions++;
Al Viro6c3561b2006-10-10 00:19:36 +0100646 if (status & ENTSR_PTX)
Paulius Zaleckas244d74f2008-05-07 02:20:40 +0300647 dev->stats.tx_packets++;
Al Viro6c3561b2006-10-10 00:19:36 +0100648 else
649 {
Paulius Zaleckas244d74f2008-05-07 02:20:40 +0300650 dev->stats.tx_errors++;
Al Viro6c3561b2006-10-10 00:19:36 +0100651 if (status & ENTSR_ABT)
652 {
Paulius Zaleckas244d74f2008-05-07 02:20:40 +0300653 dev->stats.tx_aborted_errors++;
654 dev->stats.collisions += 16;
Al Viro6c3561b2006-10-10 00:19:36 +0100655 }
656 if (status & ENTSR_CRS)
Paulius Zaleckas244d74f2008-05-07 02:20:40 +0300657 dev->stats.tx_carrier_errors++;
Al Viro6c3561b2006-10-10 00:19:36 +0100658 if (status & ENTSR_FU)
Paulius Zaleckas244d74f2008-05-07 02:20:40 +0300659 dev->stats.tx_fifo_errors++;
Al Viro6c3561b2006-10-10 00:19:36 +0100660 if (status & ENTSR_CDH)
Paulius Zaleckas244d74f2008-05-07 02:20:40 +0300661 dev->stats.tx_heartbeat_errors++;
Al Viro6c3561b2006-10-10 00:19:36 +0100662 if (status & ENTSR_OWC)
Paulius Zaleckas244d74f2008-05-07 02:20:40 +0300663 dev->stats.tx_window_errors++;
Al Viro6c3561b2006-10-10 00:19:36 +0100664 }
665 netif_wake_queue(dev);
666}
667
668/**
669 * ei_receive - receive some packets
670 * @dev: network device with which receive will be run
671 *
672 * We have a good packet(s), get it/them out of the buffers.
673 * Called with lock held.
674 */
675
676static void ei_receive(struct net_device *dev)
677{
678 unsigned long e8390_base = dev->base_addr;
679 struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
680 unsigned char rxing_page, this_frame, next_frame;
681 unsigned short current_offset;
682 int rx_pkt_count = 0;
683 struct e8390_pkt_hdr rx_frame;
684 int num_rx_pages = ei_local->stop_page-ei_local->rx_start_page;
685
686 while (++rx_pkt_count < 10)
687 {
688 int pkt_len, pkt_stat;
689
690 /* Get the rx page (incoming packet pointer). */
691 ei_outb_p(E8390_NODMA+E8390_PAGE1, e8390_base + E8390_CMD);
692 rxing_page = ei_inb_p(e8390_base + EN1_CURPAG);
693 ei_outb_p(E8390_NODMA+E8390_PAGE0, e8390_base + E8390_CMD);
694
695 /* Remove one frame from the ring. Boundary is always a page behind. */
696 this_frame = ei_inb_p(e8390_base + EN0_BOUNDARY) + 1;
697 if (this_frame >= ei_local->stop_page)
698 this_frame = ei_local->rx_start_page;
699
700 /* Someday we'll omit the previous, iff we never get this message.
701 (There is at least one clone claimed to have a problem.)
702
703 Keep quiet if it looks like a card removal. One problem here
704 is that some clones crash in roughly the same way.
705 */
706 if (ei_debug > 0 && this_frame != ei_local->current_page && (this_frame!=0x0 || rxing_page!=0xFF))
707 printk(KERN_ERR "%s: mismatched read page pointers %2x vs %2x.\n",
708 dev->name, this_frame, ei_local->current_page);
709
710 if (this_frame == rxing_page) /* Read all the frames? */
711 break; /* Done for now */
712
713 current_offset = this_frame << 8;
714 ei_get_8390_hdr(dev, &rx_frame, this_frame);
715
716 pkt_len = rx_frame.count - sizeof(struct e8390_pkt_hdr);
717 pkt_stat = rx_frame.status;
718
719 next_frame = this_frame + 1 + ((pkt_len+4)>>8);
720
721 /* Check for bogosity warned by 3c503 book: the status byte is never
722 written. This happened a lot during testing! This code should be
723 cleaned up someday. */
Joe Perches8e95a202009-12-03 07:58:21 +0000724 if (rx_frame.next != next_frame &&
725 rx_frame.next != next_frame + 1 &&
726 rx_frame.next != next_frame - num_rx_pages &&
727 rx_frame.next != next_frame + 1 - num_rx_pages) {
Al Viro6c3561b2006-10-10 00:19:36 +0100728 ei_local->current_page = rxing_page;
729 ei_outb(ei_local->current_page-1, e8390_base+EN0_BOUNDARY);
Paulius Zaleckas244d74f2008-05-07 02:20:40 +0300730 dev->stats.rx_errors++;
Al Viro6c3561b2006-10-10 00:19:36 +0100731 continue;
732 }
733
734 if (pkt_len < 60 || pkt_len > 1518)
735 {
736 if (ei_debug)
737 printk(KERN_DEBUG "%s: bogus packet size: %d, status=%#2x nxpg=%#2x.\n",
738 dev->name, rx_frame.count, rx_frame.status,
739 rx_frame.next);
Paulius Zaleckas244d74f2008-05-07 02:20:40 +0300740 dev->stats.rx_errors++;
741 dev->stats.rx_length_errors++;
Al Viro6c3561b2006-10-10 00:19:36 +0100742 }
743 else if ((pkt_stat & 0x0F) == ENRSR_RXOK)
744 {
745 struct sk_buff *skb;
746
747 skb = dev_alloc_skb(pkt_len+2);
748 if (skb == NULL)
749 {
750 if (ei_debug > 1)
751 printk(KERN_DEBUG "%s: Couldn't allocate a sk_buff of size %d.\n",
752 dev->name, pkt_len);
Paulius Zaleckas244d74f2008-05-07 02:20:40 +0300753 dev->stats.rx_dropped++;
Al Viro6c3561b2006-10-10 00:19:36 +0100754 break;
755 }
756 else
757 {
758 skb_reserve(skb,2); /* IP headers on 16 byte boundaries */
Al Viro6c3561b2006-10-10 00:19:36 +0100759 skb_put(skb, pkt_len); /* Make room */
760 ei_block_input(dev, pkt_len, skb, current_offset + sizeof(rx_frame));
761 skb->protocol=eth_type_trans(skb,dev);
762 netif_rx(skb);
Paulius Zaleckas244d74f2008-05-07 02:20:40 +0300763 dev->stats.rx_packets++;
764 dev->stats.rx_bytes += pkt_len;
Al Viro6c3561b2006-10-10 00:19:36 +0100765 if (pkt_stat & ENRSR_PHY)
Paulius Zaleckas244d74f2008-05-07 02:20:40 +0300766 dev->stats.multicast++;
Al Viro6c3561b2006-10-10 00:19:36 +0100767 }
768 }
769 else
770 {
771 if (ei_debug)
772 printk(KERN_DEBUG "%s: bogus packet: status=%#2x nxpg=%#2x size=%d\n",
773 dev->name, rx_frame.status, rx_frame.next,
774 rx_frame.count);
Paulius Zaleckas244d74f2008-05-07 02:20:40 +0300775 dev->stats.rx_errors++;
Al Viro6c3561b2006-10-10 00:19:36 +0100776 /* NB: The NIC counts CRC, frame and missed errors. */
777 if (pkt_stat & ENRSR_FO)
Paulius Zaleckas244d74f2008-05-07 02:20:40 +0300778 dev->stats.rx_fifo_errors++;
Al Viro6c3561b2006-10-10 00:19:36 +0100779 }
780 next_frame = rx_frame.next;
781
782 /* This _should_ never happen: it's here for avoiding bad clones. */
783 if (next_frame >= ei_local->stop_page) {
784 printk("%s: next frame inconsistency, %#2x\n", dev->name,
785 next_frame);
786 next_frame = ei_local->rx_start_page;
787 }
788 ei_local->current_page = next_frame;
789 ei_outb_p(next_frame-1, e8390_base+EN0_BOUNDARY);
790 }
791
792 /* We used to also ack ENISR_OVER here, but that would sometimes mask
793 a real overrun, leaving the 8390 in a stopped state with rec'vr off. */
794 ei_outb_p(ENISR_RX+ENISR_RX_ERR, e8390_base+EN0_ISR);
795 return;
796}
797
798/**
799 * ei_rx_overrun - handle receiver overrun
800 * @dev: network device which threw exception
801 *
802 * We have a receiver overrun: we have to kick the 8390 to get it started
803 * again. Problem is that you have to kick it exactly as NS prescribes in
804 * the updated datasheets, or "the NIC may act in an unpredictable manner."
805 * This includes causing "the NIC to defer indefinitely when it is stopped
806 * on a busy network." Ugh.
807 * Called with lock held. Don't call this with the interrupts off or your
808 * computer will hate you - it takes 10ms or so.
809 */
810
811static void ei_rx_overrun(struct net_device *dev)
812{
813 unsigned long e8390_base = dev->base_addr;
814 unsigned char was_txing, must_resend = 0;
Stephen Rothwell0c1aa202008-05-29 22:39:28 +1000815 /* ei_local is used on some platforms via the EI_SHIFT macro */
816 struct ei_device *ei_local __maybe_unused = netdev_priv(dev);
Al Viro6c3561b2006-10-10 00:19:36 +0100817
818 /*
819 * Record whether a Tx was in progress and then issue the
820 * stop command.
821 */
822 was_txing = ei_inb_p(e8390_base+E8390_CMD) & E8390_TRANS;
823 ei_outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base+E8390_CMD);
824
825 if (ei_debug > 1)
826 printk(KERN_DEBUG "%s: Receiver overrun.\n", dev->name);
Paulius Zaleckas244d74f2008-05-07 02:20:40 +0300827 dev->stats.rx_over_errors++;
Al Viro6c3561b2006-10-10 00:19:36 +0100828
829 /*
830 * Wait a full Tx time (1.2ms) + some guard time, NS says 1.6ms total.
831 * Early datasheets said to poll the reset bit, but now they say that
832 * it "is not a reliable indicator and subsequently should be ignored."
833 * We wait at least 10ms.
834 */
835
836 mdelay(10);
837
838 /*
839 * Reset RBCR[01] back to zero as per magic incantation.
840 */
841 ei_outb_p(0x00, e8390_base+EN0_RCNTLO);
842 ei_outb_p(0x00, e8390_base+EN0_RCNTHI);
843
844 /*
845 * See if any Tx was interrupted or not. According to NS, this
846 * step is vital, and skipping it will cause no end of havoc.
847 */
848
849 if (was_txing)
850 {
851 unsigned char tx_completed = ei_inb_p(e8390_base+EN0_ISR) & (ENISR_TX+ENISR_TX_ERR);
852 if (!tx_completed)
853 must_resend = 1;
854 }
855
856 /*
857 * Have to enter loopback mode and then restart the NIC before
858 * you are allowed to slurp packets up off the ring.
859 */
860 ei_outb_p(E8390_TXOFF, e8390_base + EN0_TXCR);
861 ei_outb_p(E8390_NODMA + E8390_PAGE0 + E8390_START, e8390_base + E8390_CMD);
862
863 /*
864 * Clear the Rx ring of all the debris, and ack the interrupt.
865 */
866 ei_receive(dev);
867 ei_outb_p(ENISR_OVER, e8390_base+EN0_ISR);
868
869 /*
870 * Leave loopback mode, and resend any packet that got stopped.
871 */
872 ei_outb_p(E8390_TXCONFIG, e8390_base + EN0_TXCR);
873 if (must_resend)
874 ei_outb_p(E8390_NODMA + E8390_PAGE0 + E8390_START + E8390_TRANS, e8390_base + E8390_CMD);
875}
876
877/*
878 * Collect the stats. This is called unlocked and from several contexts.
879 */
880
Stephen Hemminger8884c092008-11-25 18:12:49 -0800881static struct net_device_stats *__ei_get_stats(struct net_device *dev)
Al Viro6c3561b2006-10-10 00:19:36 +0100882{
883 unsigned long ioaddr = dev->base_addr;
884 struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
885 unsigned long flags;
886
887 /* If the card is stopped, just return the present stats. */
888 if (!netif_running(dev))
Paulius Zaleckas244d74f2008-05-07 02:20:40 +0300889 return &dev->stats;
Al Viro6c3561b2006-10-10 00:19:36 +0100890
891 spin_lock_irqsave(&ei_local->page_lock,flags);
892 /* Read the counter registers, assuming we are in page 0. */
Paulius Zaleckas244d74f2008-05-07 02:20:40 +0300893 dev->stats.rx_frame_errors += ei_inb_p(ioaddr + EN0_COUNTER0);
894 dev->stats.rx_crc_errors += ei_inb_p(ioaddr + EN0_COUNTER1);
895 dev->stats.rx_missed_errors+= ei_inb_p(ioaddr + EN0_COUNTER2);
Al Viro6c3561b2006-10-10 00:19:36 +0100896 spin_unlock_irqrestore(&ei_local->page_lock, flags);
897
Paulius Zaleckas244d74f2008-05-07 02:20:40 +0300898 return &dev->stats;
Al Viro6c3561b2006-10-10 00:19:36 +0100899}
900
901/*
902 * Form the 64 bit 8390 multicast table from the linked list of addresses
903 * associated with this dev structure.
904 */
905
906static inline void make_mc_bits(u8 *bits, struct net_device *dev)
907{
908 struct dev_mc_list *dmi;
909
Jiri Pirkof9dcbcc2010-02-23 09:19:49 +0000910 netdev_for_each_mc_addr(dmi, dev) {
911 u32 crc = ether_crc(ETH_ALEN, dmi->dmi_addr);
Al Viro6c3561b2006-10-10 00:19:36 +0100912 /*
913 * The 8390 uses the 6 most significant bits of the
914 * CRC to index the multicast table.
915 */
916 bits[crc>>29] |= (1<<((crc>>26)&7));
917 }
918}
919
920/**
921 * do_set_multicast_list - set/clear multicast filter
922 * @dev: net device for which multicast filter is adjusted
923 *
924 * Set or clear the multicast filter for this adaptor. May be called
925 * from a BH in 2.1.x. Must be called with lock held.
926 */
927
928static void do_set_multicast_list(struct net_device *dev)
929{
930 unsigned long e8390_base = dev->base_addr;
931 int i;
932 struct ei_device *ei_local = (struct ei_device*)netdev_priv(dev);
933
934 if (!(dev->flags&(IFF_PROMISC|IFF_ALLMULTI)))
935 {
936 memset(ei_local->mcfilter, 0, 8);
Jiri Pirkof9dcbcc2010-02-23 09:19:49 +0000937 if (!netdev_mc_empty(dev))
Al Viro6c3561b2006-10-10 00:19:36 +0100938 make_mc_bits(ei_local->mcfilter, dev);
939 }
940 else
941 memset(ei_local->mcfilter, 0xFF, 8); /* mcast set to accept-all */
942
943 /*
944 * DP8390 manuals don't specify any magic sequence for altering
945 * the multicast regs on an already running card. To be safe, we
946 * ensure multicast mode is off prior to loading up the new hash
947 * table. If this proves to be not enough, we can always resort
948 * to stopping the NIC, loading the table and then restarting.
949 *
950 * Bug Alert! The MC regs on the SMC 83C690 (SMC Elite and SMC
951 * Elite16) appear to be write-only. The NS 8390 data sheet lists
952 * them as r/w so this is a bug. The SMC 83C790 (SMC Ultra and
953 * Ultra32 EISA) appears to have this bug fixed.
954 */
955
956 if (netif_running(dev))
957 ei_outb_p(E8390_RXCONFIG, e8390_base + EN0_RXCR);
958 ei_outb_p(E8390_NODMA + E8390_PAGE1, e8390_base + E8390_CMD);
959 for(i = 0; i < 8; i++)
960 {
961 ei_outb_p(ei_local->mcfilter[i], e8390_base + EN1_MULT_SHIFT(i));
962#ifndef BUG_83C690
963 if(ei_inb_p(e8390_base + EN1_MULT_SHIFT(i))!=ei_local->mcfilter[i])
964 printk(KERN_ERR "Multicast filter read/write mismap %d\n",i);
965#endif
966 }
967 ei_outb_p(E8390_NODMA + E8390_PAGE0, e8390_base + E8390_CMD);
968
969 if(dev->flags&IFF_PROMISC)
970 ei_outb_p(E8390_RXCONFIG | 0x18, e8390_base + EN0_RXCR);
Jiri Pirkof9dcbcc2010-02-23 09:19:49 +0000971 else if (dev->flags & IFF_ALLMULTI || !netdev_mc_empty(dev))
Al Viro6c3561b2006-10-10 00:19:36 +0100972 ei_outb_p(E8390_RXCONFIG | 0x08, e8390_base + EN0_RXCR);
973 else
974 ei_outb_p(E8390_RXCONFIG, e8390_base + EN0_RXCR);
975 }
976
977/*
978 * Called without lock held. This is invoked from user context and may
979 * be parallel to just about everything else. Its also fairly quick and
980 * not called too often. Must protect against both bh and irq users
981 */
982
Stephen Hemminger8884c092008-11-25 18:12:49 -0800983static void __ei_set_multicast_list(struct net_device *dev)
Al Viro6c3561b2006-10-10 00:19:36 +0100984{
985 unsigned long flags;
986 struct ei_device *ei_local = (struct ei_device*)netdev_priv(dev);
987
988 spin_lock_irqsave(&ei_local->page_lock, flags);
989 do_set_multicast_list(dev);
990 spin_unlock_irqrestore(&ei_local->page_lock, flags);
991}
992
993/**
994 * ethdev_setup - init rest of 8390 device struct
995 * @dev: network device structure to init
996 *
997 * Initialize the rest of the 8390 device structure. Do NOT __init
998 * this, as it is used by 8390 based modular drivers too.
999 */
1000
1001static void ethdev_setup(struct net_device *dev)
1002{
1003 struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
1004 if (ei_debug > 1)
1005 printk(version);
1006
Al Viro6c3561b2006-10-10 00:19:36 +01001007 ether_setup(dev);
1008
1009 spin_lock_init(&ei_local->page_lock);
1010}
1011
1012/**
1013 * alloc_ei_netdev - alloc_etherdev counterpart for 8390
1014 * @size: extra bytes to allocate
1015 *
1016 * Allocate 8390-specific net_device.
1017 */
1018static struct net_device *____alloc_ei_netdev(int size)
1019{
1020 return alloc_netdev(sizeof(struct ei_device) + size, "eth%d",
1021 ethdev_setup);
1022}
1023
1024
1025
1026
1027/* This page of functions should be 8390 generic */
1028/* Follow National Semi's recommendations for initializing the "NIC". */
1029
1030/**
1031 * NS8390_init - initialize 8390 hardware
1032 * @dev: network device to initialize
1033 * @startp: boolean. non-zero value to initiate chip processing
1034 *
1035 * Must be called with lock held.
1036 */
1037
1038static void __NS8390_init(struct net_device *dev, int startp)
1039{
1040 unsigned long e8390_base = dev->base_addr;
1041 struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
1042 int i;
1043 int endcfg = ei_local->word16
1044 ? (0x48 | ENDCFG_WTS | (ei_local->bigendian ? ENDCFG_BOS : 0))
1045 : 0x48;
1046
1047 if(sizeof(struct e8390_pkt_hdr)!=4)
1048 panic("8390.c: header struct mispacked\n");
1049 /* Follow National Semi's recommendations for initing the DP83902. */
1050 ei_outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base+E8390_CMD); /* 0x21 */
1051 ei_outb_p(endcfg, e8390_base + EN0_DCFG); /* 0x48 or 0x49 */
1052 /* Clear the remote byte count registers. */
1053 ei_outb_p(0x00, e8390_base + EN0_RCNTLO);
1054 ei_outb_p(0x00, e8390_base + EN0_RCNTHI);
1055 /* Set to monitor and loopback mode -- this is vital!. */
1056 ei_outb_p(E8390_RXOFF, e8390_base + EN0_RXCR); /* 0x20 */
1057 ei_outb_p(E8390_TXOFF, e8390_base + EN0_TXCR); /* 0x02 */
1058 /* Set the transmit page and receive ring. */
1059 ei_outb_p(ei_local->tx_start_page, e8390_base + EN0_TPSR);
1060 ei_local->tx1 = ei_local->tx2 = 0;
1061 ei_outb_p(ei_local->rx_start_page, e8390_base + EN0_STARTPG);
1062 ei_outb_p(ei_local->stop_page-1, e8390_base + EN0_BOUNDARY); /* 3c503 says 0x3f,NS0x26*/
1063 ei_local->current_page = ei_local->rx_start_page; /* assert boundary+1 */
1064 ei_outb_p(ei_local->stop_page, e8390_base + EN0_STOPPG);
1065 /* Clear the pending interrupts and mask. */
1066 ei_outb_p(0xFF, e8390_base + EN0_ISR);
1067 ei_outb_p(0x00, e8390_base + EN0_IMR);
1068
1069 /* Copy the station address into the DS8390 registers. */
1070
1071 ei_outb_p(E8390_NODMA + E8390_PAGE1 + E8390_STOP, e8390_base+E8390_CMD); /* 0x61 */
1072 for(i = 0; i < 6; i++)
1073 {
1074 ei_outb_p(dev->dev_addr[i], e8390_base + EN1_PHYS_SHIFT(i));
1075 if (ei_debug > 1 && ei_inb_p(e8390_base + EN1_PHYS_SHIFT(i))!=dev->dev_addr[i])
1076 printk(KERN_ERR "Hw. address read/write mismap %d\n",i);
1077 }
1078
1079 ei_outb_p(ei_local->rx_start_page, e8390_base + EN1_CURPAG);
1080 ei_outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base+E8390_CMD);
1081
1082 netif_start_queue(dev);
1083 ei_local->tx1 = ei_local->tx2 = 0;
1084 ei_local->txing = 0;
1085
1086 if (startp)
1087 {
1088 ei_outb_p(0xff, e8390_base + EN0_ISR);
1089 ei_outb_p(ENISR_ALL, e8390_base + EN0_IMR);
1090 ei_outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, e8390_base+E8390_CMD);
1091 ei_outb_p(E8390_TXCONFIG, e8390_base + EN0_TXCR); /* xmit on. */
1092 /* 3c503 TechMan says rxconfig only after the NIC is started. */
1093 ei_outb_p(E8390_RXCONFIG, e8390_base + EN0_RXCR); /* rx on, */
1094 do_set_multicast_list(dev); /* (re)load the mcast table */
1095 }
1096}
1097
1098/* Trigger a transmit start, assuming the length is valid.
1099 Always called with the page lock held */
1100
1101static void NS8390_trigger_send(struct net_device *dev, unsigned int length,
1102 int start_page)
1103{
1104 unsigned long e8390_base = dev->base_addr;
1105 struct ei_device *ei_local __attribute((unused)) = (struct ei_device *) netdev_priv(dev);
1106
1107 ei_outb_p(E8390_NODMA+E8390_PAGE0, e8390_base+E8390_CMD);
1108
1109 if (ei_inb_p(e8390_base + E8390_CMD) & E8390_TRANS)
1110 {
1111 printk(KERN_WARNING "%s: trigger_send() called with the transmitter busy.\n",
1112 dev->name);
1113 return;
1114 }
1115 ei_outb_p(length & 0xff, e8390_base + EN0_TCNTLO);
1116 ei_outb_p(length >> 8, e8390_base + EN0_TCNTHI);
1117 ei_outb_p(start_page, e8390_base + EN0_TPSR);
1118 ei_outb_p(E8390_NODMA+E8390_TRANS+E8390_START, e8390_base+E8390_CMD);
1119}