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6c3561b0 AV |
1 | /* 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 | |
105 | int ei_debug = 1; | |
106 | #endif | |
107 | ||
108 | /* Index to functions. */ | |
109 | static void ei_tx_intr(struct net_device *dev); | |
110 | static void ei_tx_err(struct net_device *dev); | |
4e4fd4e4 | 111 | void ei_tx_timeout(struct net_device *dev); |
6c3561b0 AV |
112 | static void ei_receive(struct net_device *dev); |
113 | static void ei_rx_overrun(struct net_device *dev); | |
114 | ||
115 | /* Routines generic to NS8390-based boards. */ | |
116 | static void NS8390_trigger_send(struct net_device *dev, unsigned int length, | |
117 | int start_page); | |
6c3561b0 AV |
118 | static void do_set_multicast_list(struct net_device *dev); |
119 | static 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. | |
55b7b629 JP |
145 | * |
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 | |
14e4a0f2 | 150 | * at 38400 baud on some chips. Remember many 8390 nics on PCI were ISA |
55b7b629 | 151 | * chips with FPGA front ends. |
3f8cb098 | 152 | * |
55b7b629 | 153 | * Ok the logic behind the 8390 is very simple: |
3f8cb098 | 154 | * |
55b7b629 JP |
155 | * 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 | |
3f8cb098 | 159 | * |
55b7b629 JP |
160 | * 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) | |
3f8cb098 JG |
163 | * |
164 | * | |
55b7b629 JP |
165 | * 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 | |
3f8cb098 | 172 | * |
55b7b629 JP |
173 | * At this point an existing IRQ may still be running but we can't |
174 | * get a new one | |
3f8cb098 | 175 | * |
55b7b629 JP |
176 | * 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] | |
3f8cb098 | 179 | * |
55b7b629 | 180 | * Transmit (slow as ****) |
3f8cb098 | 181 | * |
55b7b629 | 182 | * re-enable the IRQ |
3f8cb098 JG |
183 | * |
184 | * | |
55b7b629 JP |
185 | * We have to use disable_irq because otherwise you will get delayed |
186 | * interrupts on the APIC bus deadlocking the transmit path. | |
3f8cb098 | 187 | * |
55b7b629 JP |
188 | * 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] | |
6c3561b0 AV |
191 | */ |
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 | */ | |
203 | static 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 | ||
208 | /* The card I/O part of the driver (e.g. 3c503) can hook a Tx timeout | |
209 | wrapper that does e.g. media check & then calls ei_tx_timeout. */ | |
4e4fd4e4 | 210 | #ifdef CONFIG_COMPAT_NET_DEV_OPS |
6c3561b0 AV |
211 | if (dev->tx_timeout == NULL) |
212 | dev->tx_timeout = ei_tx_timeout; | |
4e4fd4e4 | 213 | #endif |
6c3561b0 AV |
214 | if (dev->watchdog_timeo <= 0) |
215 | dev->watchdog_timeo = TX_TIMEOUT; | |
216 | ||
217 | /* | |
218 | * Grab the page lock so we own the register set, then call | |
219 | * the init function. | |
220 | */ | |
221 | ||
222 | spin_lock_irqsave(&ei_local->page_lock, flags); | |
223 | __NS8390_init(dev, 1); | |
224 | /* Set the flag before we drop the lock, That way the IRQ arrives | |
225 | after its set and we get no silly warnings */ | |
226 | netif_start_queue(dev); | |
227 | spin_unlock_irqrestore(&ei_local->page_lock, flags); | |
228 | ei_local->irqlock = 0; | |
229 | return 0; | |
230 | } | |
231 | ||
232 | /** | |
233 | * ei_close - shut down network device | |
234 | * @dev: network device to close | |
235 | * | |
236 | * Opposite of ei_open(). Only used when "ifconfig <devname> down" is done. | |
237 | */ | |
238 | static int __ei_close(struct net_device *dev) | |
239 | { | |
240 | struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev); | |
241 | unsigned long flags; | |
242 | ||
243 | /* | |
244 | * Hold the page lock during close | |
245 | */ | |
246 | ||
247 | spin_lock_irqsave(&ei_local->page_lock, flags); | |
248 | __NS8390_init(dev, 0); | |
249 | spin_unlock_irqrestore(&ei_local->page_lock, flags); | |
250 | netif_stop_queue(dev); | |
251 | return 0; | |
252 | } | |
253 | ||
254 | /** | |
255 | * ei_tx_timeout - handle transmit time out condition | |
256 | * @dev: network device which has apparently fallen asleep | |
257 | * | |
258 | * Called by kernel when device never acknowledges a transmit has | |
259 | * completed (or failed) - i.e. never posted a Tx related interrupt. | |
260 | */ | |
261 | ||
4e4fd4e4 | 262 | void ei_tx_timeout(struct net_device *dev) |
6c3561b0 AV |
263 | { |
264 | unsigned long e8390_base = dev->base_addr; | |
265 | struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev); | |
266 | int txsr, isr, tickssofar = jiffies - dev->trans_start; | |
267 | unsigned long flags; | |
268 | ||
244d74ff | 269 | dev->stats.tx_errors++; |
6c3561b0 AV |
270 | |
271 | spin_lock_irqsave(&ei_local->page_lock, flags); | |
272 | txsr = ei_inb(e8390_base+EN0_TSR); | |
273 | isr = ei_inb(e8390_base+EN0_ISR); | |
274 | spin_unlock_irqrestore(&ei_local->page_lock, flags); | |
275 | ||
276 | printk(KERN_DEBUG "%s: Tx timed out, %s TSR=%#2x, ISR=%#2x, t=%d.\n", | |
277 | dev->name, (txsr & ENTSR_ABT) ? "excess collisions." : | |
278 | (isr) ? "lost interrupt?" : "cable problem?", txsr, isr, tickssofar); | |
279 | ||
244d74ff | 280 | if (!isr && !dev->stats.tx_packets) |
6c3561b0 AV |
281 | { |
282 | /* The 8390 probably hasn't gotten on the cable yet. */ | |
283 | ei_local->interface_num ^= 1; /* Try a different xcvr. */ | |
284 | } | |
285 | ||
286 | /* Ugly but a reset can be slow, yet must be protected */ | |
287 | ||
288 | disable_irq_nosync_lockdep(dev->irq); | |
289 | spin_lock(&ei_local->page_lock); | |
290 | ||
291 | /* Try to restart the card. Perhaps the user has fixed something. */ | |
292 | ei_reset_8390(dev); | |
293 | __NS8390_init(dev, 1); | |
294 | ||
295 | spin_unlock(&ei_local->page_lock); | |
296 | enable_irq_lockdep(dev->irq); | |
297 | netif_wake_queue(dev); | |
298 | } | |
4e4fd4e4 | 299 | EXPORT_SYMBOL_GPL(ei_tx_timeout); |
6c3561b0 AV |
300 | |
301 | /** | |
302 | * ei_start_xmit - begin packet transmission | |
303 | * @skb: packet to be sent | |
304 | * @dev: network device to which packet is sent | |
305 | * | |
306 | * Sends a packet to an 8390 network device. | |
307 | */ | |
308 | ||
4e4fd4e4 | 309 | int ei_start_xmit(struct sk_buff *skb, struct net_device *dev) |
6c3561b0 AV |
310 | { |
311 | unsigned long e8390_base = dev->base_addr; | |
312 | struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev); | |
313 | int send_length = skb->len, output_page; | |
314 | unsigned long flags; | |
315 | char buf[ETH_ZLEN]; | |
316 | char *data = skb->data; | |
317 | ||
318 | if (skb->len < ETH_ZLEN) { | |
319 | memset(buf, 0, ETH_ZLEN); /* more efficient than doing just the needed bits */ | |
320 | memcpy(buf, data, skb->len); | |
321 | send_length = ETH_ZLEN; | |
322 | data = buf; | |
323 | } | |
324 | ||
325 | /* Mask interrupts from the ethercard. | |
326 | SMP: We have to grab the lock here otherwise the IRQ handler | |
327 | on another CPU can flip window and race the IRQ mask set. We end | |
328 | up trashing the mcast filter not disabling irqs if we don't lock */ | |
329 | ||
330 | spin_lock_irqsave(&ei_local->page_lock, flags); | |
331 | ei_outb_p(0x00, e8390_base + EN0_IMR); | |
332 | spin_unlock_irqrestore(&ei_local->page_lock, flags); | |
333 | ||
334 | ||
335 | /* | |
336 | * Slow phase with lock held. | |
337 | */ | |
338 | ||
339 | disable_irq_nosync_lockdep_irqsave(dev->irq, &flags); | |
340 | ||
341 | spin_lock(&ei_local->page_lock); | |
342 | ||
343 | ei_local->irqlock = 1; | |
344 | ||
345 | /* | |
346 | * We have two Tx slots available for use. Find the first free | |
347 | * slot, and then perform some sanity checks. With two Tx bufs, | |
348 | * you get very close to transmitting back-to-back packets. With | |
349 | * only one Tx buf, the transmitter sits idle while you reload the | |
350 | * card, leaving a substantial gap between each transmitted packet. | |
351 | */ | |
352 | ||
353 | if (ei_local->tx1 == 0) | |
354 | { | |
355 | output_page = ei_local->tx_start_page; | |
356 | ei_local->tx1 = send_length; | |
357 | if (ei_debug && ei_local->tx2 > 0) | |
358 | printk(KERN_DEBUG "%s: idle transmitter tx2=%d, lasttx=%d, txing=%d.\n", | |
359 | dev->name, ei_local->tx2, ei_local->lasttx, ei_local->txing); | |
360 | } | |
361 | else if (ei_local->tx2 == 0) | |
362 | { | |
363 | output_page = ei_local->tx_start_page + TX_PAGES/2; | |
364 | ei_local->tx2 = send_length; | |
365 | if (ei_debug && ei_local->tx1 > 0) | |
366 | printk(KERN_DEBUG "%s: idle transmitter, tx1=%d, lasttx=%d, txing=%d.\n", | |
367 | dev->name, ei_local->tx1, ei_local->lasttx, ei_local->txing); | |
368 | } | |
369 | else | |
370 | { /* We should never get here. */ | |
371 | if (ei_debug) | |
372 | printk(KERN_DEBUG "%s: No Tx buffers free! tx1=%d tx2=%d last=%d\n", | |
373 | dev->name, ei_local->tx1, ei_local->tx2, ei_local->lasttx); | |
374 | ei_local->irqlock = 0; | |
375 | netif_stop_queue(dev); | |
376 | ei_outb_p(ENISR_ALL, e8390_base + EN0_IMR); | |
377 | spin_unlock(&ei_local->page_lock); | |
378 | enable_irq_lockdep_irqrestore(dev->irq, &flags); | |
244d74ff | 379 | dev->stats.tx_errors++; |
6c3561b0 AV |
380 | return 1; |
381 | } | |
382 | ||
383 | /* | |
384 | * Okay, now upload the packet and trigger a send if the transmitter | |
385 | * isn't already sending. If it is busy, the interrupt handler will | |
386 | * trigger the send later, upon receiving a Tx done interrupt. | |
387 | */ | |
388 | ||
389 | ei_block_output(dev, send_length, data, output_page); | |
390 | ||
391 | if (! ei_local->txing) | |
392 | { | |
393 | ei_local->txing = 1; | |
394 | NS8390_trigger_send(dev, send_length, output_page); | |
395 | dev->trans_start = jiffies; | |
396 | if (output_page == ei_local->tx_start_page) | |
397 | { | |
398 | ei_local->tx1 = -1; | |
399 | ei_local->lasttx = -1; | |
400 | } | |
401 | else | |
402 | { | |
403 | ei_local->tx2 = -1; | |
404 | ei_local->lasttx = -2; | |
405 | } | |
406 | } | |
407 | else ei_local->txqueue++; | |
408 | ||
409 | if (ei_local->tx1 && ei_local->tx2) | |
410 | netif_stop_queue(dev); | |
411 | else | |
412 | netif_start_queue(dev); | |
413 | ||
414 | /* Turn 8390 interrupts back on. */ | |
415 | ei_local->irqlock = 0; | |
416 | ei_outb_p(ENISR_ALL, e8390_base + EN0_IMR); | |
417 | ||
418 | spin_unlock(&ei_local->page_lock); | |
419 | enable_irq_lockdep_irqrestore(dev->irq, &flags); | |
420 | ||
421 | dev_kfree_skb (skb); | |
244d74ff | 422 | dev->stats.tx_bytes += send_length; |
6c3561b0 AV |
423 | |
424 | return 0; | |
425 | } | |
4e4fd4e4 | 426 | EXPORT_SYMBOL_GPL(ei_start_xmit); |
6c3561b0 AV |
427 | |
428 | /** | |
429 | * ei_interrupt - handle the interrupts from an 8390 | |
430 | * @irq: interrupt number | |
431 | * @dev_id: a pointer to the net_device | |
432 | * | |
433 | * Handle the ether interface interrupts. We pull packets from | |
434 | * the 8390 via the card specific functions and fire them at the networking | |
435 | * stack. We also handle transmit completions and wake the transmit path if | |
436 | * necessary. We also update the counters and do other housekeeping as | |
437 | * needed. | |
438 | */ | |
439 | ||
440 | static irqreturn_t __ei_interrupt(int irq, void *dev_id) | |
441 | { | |
442 | struct net_device *dev = dev_id; | |
443 | unsigned long e8390_base = dev->base_addr; | |
444 | int interrupts, nr_serviced = 0; | |
445 | struct ei_device *ei_local = netdev_priv(dev); | |
446 | ||
447 | /* | |
448 | * Protect the irq test too. | |
449 | */ | |
450 | ||
451 | spin_lock(&ei_local->page_lock); | |
452 | ||
453 | if (ei_local->irqlock) | |
454 | { | |
455 | #if 1 /* This might just be an interrupt for a PCI device sharing this line */ | |
456 | /* The "irqlock" check is only for testing. */ | |
457 | printk(ei_local->irqlock | |
458 | ? "%s: Interrupted while interrupts are masked! isr=%#2x imr=%#2x.\n" | |
459 | : "%s: Reentering the interrupt handler! isr=%#2x imr=%#2x.\n", | |
460 | dev->name, ei_inb_p(e8390_base + EN0_ISR), | |
461 | ei_inb_p(e8390_base + EN0_IMR)); | |
462 | #endif | |
463 | spin_unlock(&ei_local->page_lock); | |
464 | return IRQ_NONE; | |
465 | } | |
466 | ||
467 | /* Change to page 0 and read the intr status reg. */ | |
468 | ei_outb_p(E8390_NODMA+E8390_PAGE0, e8390_base + E8390_CMD); | |
469 | if (ei_debug > 3) | |
470 | printk(KERN_DEBUG "%s: interrupt(isr=%#2.2x).\n", dev->name, | |
471 | ei_inb_p(e8390_base + EN0_ISR)); | |
472 | ||
473 | /* !!Assumption!! -- we stay in page 0. Don't break this. */ | |
474 | while ((interrupts = ei_inb_p(e8390_base + EN0_ISR)) != 0 | |
475 | && ++nr_serviced < MAX_SERVICE) | |
476 | { | |
477 | if (!netif_running(dev)) { | |
478 | printk(KERN_WARNING "%s: interrupt from stopped card\n", dev->name); | |
479 | /* rmk - acknowledge the interrupts */ | |
480 | ei_outb_p(interrupts, e8390_base + EN0_ISR); | |
481 | interrupts = 0; | |
482 | break; | |
483 | } | |
484 | if (interrupts & ENISR_OVER) | |
485 | ei_rx_overrun(dev); | |
486 | else if (interrupts & (ENISR_RX+ENISR_RX_ERR)) | |
487 | { | |
488 | /* Got a good (?) packet. */ | |
489 | ei_receive(dev); | |
490 | } | |
491 | /* Push the next to-transmit packet through. */ | |
492 | if (interrupts & ENISR_TX) | |
493 | ei_tx_intr(dev); | |
494 | else if (interrupts & ENISR_TX_ERR) | |
495 | ei_tx_err(dev); | |
496 | ||
497 | if (interrupts & ENISR_COUNTERS) | |
498 | { | |
244d74ff PZ |
499 | dev->stats.rx_frame_errors += ei_inb_p(e8390_base + EN0_COUNTER0); |
500 | dev->stats.rx_crc_errors += ei_inb_p(e8390_base + EN0_COUNTER1); | |
501 | dev->stats.rx_missed_errors+= ei_inb_p(e8390_base + EN0_COUNTER2); | |
6c3561b0 AV |
502 | ei_outb_p(ENISR_COUNTERS, e8390_base + EN0_ISR); /* Ack intr. */ |
503 | } | |
504 | ||
505 | /* Ignore any RDC interrupts that make it back to here. */ | |
506 | if (interrupts & ENISR_RDC) | |
507 | { | |
508 | ei_outb_p(ENISR_RDC, e8390_base + EN0_ISR); | |
509 | } | |
510 | ||
511 | ei_outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, e8390_base + E8390_CMD); | |
512 | } | |
513 | ||
514 | if (interrupts && ei_debug) | |
515 | { | |
516 | ei_outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, e8390_base + E8390_CMD); | |
517 | if (nr_serviced >= MAX_SERVICE) | |
518 | { | |
519 | /* 0xFF is valid for a card removal */ | |
520 | if(interrupts!=0xFF) | |
521 | printk(KERN_WARNING "%s: Too much work at interrupt, status %#2.2x\n", | |
522 | dev->name, interrupts); | |
523 | ei_outb_p(ENISR_ALL, e8390_base + EN0_ISR); /* Ack. most intrs. */ | |
524 | } else { | |
525 | printk(KERN_WARNING "%s: unknown interrupt %#2x\n", dev->name, interrupts); | |
526 | ei_outb_p(0xff, e8390_base + EN0_ISR); /* Ack. all intrs. */ | |
527 | } | |
528 | } | |
529 | spin_unlock(&ei_local->page_lock); | |
530 | return IRQ_RETVAL(nr_serviced > 0); | |
531 | } | |
532 | ||
533 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
534 | static void __ei_poll(struct net_device *dev) | |
535 | { | |
f47aeffd | 536 | disable_irq(dev->irq); |
6c3561b0 | 537 | __ei_interrupt(dev->irq, dev); |
f47aeffd | 538 | enable_irq(dev->irq); |
6c3561b0 AV |
539 | } |
540 | #endif | |
541 | ||
542 | /** | |
543 | * ei_tx_err - handle transmitter error | |
544 | * @dev: network device which threw the exception | |
545 | * | |
546 | * A transmitter error has happened. Most likely excess collisions (which | |
547 | * is a fairly normal condition). If the error is one where the Tx will | |
548 | * have been aborted, we try and send another one right away, instead of | |
549 | * letting the failed packet sit and collect dust in the Tx buffer. This | |
550 | * is a much better solution as it avoids kernel based Tx timeouts, and | |
551 | * an unnecessary card reset. | |
552 | * | |
553 | * Called with lock held. | |
554 | */ | |
555 | ||
556 | static void ei_tx_err(struct net_device *dev) | |
557 | { | |
558 | unsigned long e8390_base = dev->base_addr; | |
0c1aa20f SR |
559 | /* ei_local is used on some platforms via the EI_SHIFT macro */ |
560 | struct ei_device *ei_local __maybe_unused = netdev_priv(dev); | |
6c3561b0 AV |
561 | unsigned char txsr = ei_inb_p(e8390_base+EN0_TSR); |
562 | unsigned char tx_was_aborted = txsr & (ENTSR_ABT+ENTSR_FU); | |
563 | ||
564 | #ifdef VERBOSE_ERROR_DUMP | |
565 | printk(KERN_DEBUG "%s: transmitter error (%#2x): ", dev->name, txsr); | |
566 | if (txsr & ENTSR_ABT) | |
567 | printk("excess-collisions "); | |
568 | if (txsr & ENTSR_ND) | |
569 | printk("non-deferral "); | |
570 | if (txsr & ENTSR_CRS) | |
571 | printk("lost-carrier "); | |
572 | if (txsr & ENTSR_FU) | |
573 | printk("FIFO-underrun "); | |
574 | if (txsr & ENTSR_CDH) | |
575 | printk("lost-heartbeat "); | |
576 | printk("\n"); | |
577 | #endif | |
578 | ||
579 | ei_outb_p(ENISR_TX_ERR, e8390_base + EN0_ISR); /* Ack intr. */ | |
580 | ||
581 | if (tx_was_aborted) | |
582 | ei_tx_intr(dev); | |
583 | else | |
584 | { | |
244d74ff PZ |
585 | dev->stats.tx_errors++; |
586 | if (txsr & ENTSR_CRS) dev->stats.tx_carrier_errors++; | |
587 | if (txsr & ENTSR_CDH) dev->stats.tx_heartbeat_errors++; | |
588 | if (txsr & ENTSR_OWC) dev->stats.tx_window_errors++; | |
6c3561b0 AV |
589 | } |
590 | } | |
591 | ||
592 | /** | |
593 | * ei_tx_intr - transmit interrupt handler | |
594 | * @dev: network device for which tx intr is handled | |
595 | * | |
596 | * We have finished a transmit: check for errors and then trigger the next | |
597 | * packet to be sent. Called with lock held. | |
598 | */ | |
599 | ||
600 | static void ei_tx_intr(struct net_device *dev) | |
601 | { | |
602 | unsigned long e8390_base = dev->base_addr; | |
603 | struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev); | |
604 | int status = ei_inb(e8390_base + EN0_TSR); | |
605 | ||
606 | ei_outb_p(ENISR_TX, e8390_base + EN0_ISR); /* Ack intr. */ | |
607 | ||
608 | /* | |
609 | * There are two Tx buffers, see which one finished, and trigger | |
610 | * the send of another one if it exists. | |
611 | */ | |
612 | ei_local->txqueue--; | |
613 | ||
614 | if (ei_local->tx1 < 0) | |
615 | { | |
616 | if (ei_local->lasttx != 1 && ei_local->lasttx != -1) | |
617 | printk(KERN_ERR "%s: bogus last_tx_buffer %d, tx1=%d.\n", | |
618 | ei_local->name, ei_local->lasttx, ei_local->tx1); | |
619 | ei_local->tx1 = 0; | |
620 | if (ei_local->tx2 > 0) | |
621 | { | |
622 | ei_local->txing = 1; | |
623 | NS8390_trigger_send(dev, ei_local->tx2, ei_local->tx_start_page + 6); | |
624 | dev->trans_start = jiffies; | |
625 | ei_local->tx2 = -1, | |
626 | ei_local->lasttx = 2; | |
627 | } | |
628 | else ei_local->lasttx = 20, ei_local->txing = 0; | |
629 | } | |
630 | else if (ei_local->tx2 < 0) | |
631 | { | |
632 | if (ei_local->lasttx != 2 && ei_local->lasttx != -2) | |
633 | printk("%s: bogus last_tx_buffer %d, tx2=%d.\n", | |
634 | ei_local->name, ei_local->lasttx, ei_local->tx2); | |
635 | ei_local->tx2 = 0; | |
636 | if (ei_local->tx1 > 0) | |
637 | { | |
638 | ei_local->txing = 1; | |
639 | NS8390_trigger_send(dev, ei_local->tx1, ei_local->tx_start_page); | |
640 | dev->trans_start = jiffies; | |
641 | ei_local->tx1 = -1; | |
642 | ei_local->lasttx = 1; | |
643 | } | |
644 | else | |
645 | ei_local->lasttx = 10, ei_local->txing = 0; | |
646 | } | |
647 | // else printk(KERN_WARNING "%s: unexpected TX-done interrupt, lasttx=%d.\n", | |
648 | // dev->name, ei_local->lasttx); | |
649 | ||
650 | /* Minimize Tx latency: update the statistics after we restart TXing. */ | |
651 | if (status & ENTSR_COL) | |
244d74ff | 652 | dev->stats.collisions++; |
6c3561b0 | 653 | if (status & ENTSR_PTX) |
244d74ff | 654 | dev->stats.tx_packets++; |
6c3561b0 AV |
655 | else |
656 | { | |
244d74ff | 657 | dev->stats.tx_errors++; |
6c3561b0 AV |
658 | if (status & ENTSR_ABT) |
659 | { | |
244d74ff PZ |
660 | dev->stats.tx_aborted_errors++; |
661 | dev->stats.collisions += 16; | |
6c3561b0 AV |
662 | } |
663 | if (status & ENTSR_CRS) | |
244d74ff | 664 | dev->stats.tx_carrier_errors++; |
6c3561b0 | 665 | if (status & ENTSR_FU) |
244d74ff | 666 | dev->stats.tx_fifo_errors++; |
6c3561b0 | 667 | if (status & ENTSR_CDH) |
244d74ff | 668 | dev->stats.tx_heartbeat_errors++; |
6c3561b0 | 669 | if (status & ENTSR_OWC) |
244d74ff | 670 | dev->stats.tx_window_errors++; |
6c3561b0 AV |
671 | } |
672 | netif_wake_queue(dev); | |
673 | } | |
674 | ||
675 | /** | |
676 | * ei_receive - receive some packets | |
677 | * @dev: network device with which receive will be run | |
678 | * | |
679 | * We have a good packet(s), get it/them out of the buffers. | |
680 | * Called with lock held. | |
681 | */ | |
682 | ||
683 | static void ei_receive(struct net_device *dev) | |
684 | { | |
685 | unsigned long e8390_base = dev->base_addr; | |
686 | struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev); | |
687 | unsigned char rxing_page, this_frame, next_frame; | |
688 | unsigned short current_offset; | |
689 | int rx_pkt_count = 0; | |
690 | struct e8390_pkt_hdr rx_frame; | |
691 | int num_rx_pages = ei_local->stop_page-ei_local->rx_start_page; | |
692 | ||
693 | while (++rx_pkt_count < 10) | |
694 | { | |
695 | int pkt_len, pkt_stat; | |
696 | ||
697 | /* Get the rx page (incoming packet pointer). */ | |
698 | ei_outb_p(E8390_NODMA+E8390_PAGE1, e8390_base + E8390_CMD); | |
699 | rxing_page = ei_inb_p(e8390_base + EN1_CURPAG); | |
700 | ei_outb_p(E8390_NODMA+E8390_PAGE0, e8390_base + E8390_CMD); | |
701 | ||
702 | /* Remove one frame from the ring. Boundary is always a page behind. */ | |
703 | this_frame = ei_inb_p(e8390_base + EN0_BOUNDARY) + 1; | |
704 | if (this_frame >= ei_local->stop_page) | |
705 | this_frame = ei_local->rx_start_page; | |
706 | ||
707 | /* Someday we'll omit the previous, iff we never get this message. | |
708 | (There is at least one clone claimed to have a problem.) | |
709 | ||
710 | Keep quiet if it looks like a card removal. One problem here | |
711 | is that some clones crash in roughly the same way. | |
712 | */ | |
713 | if (ei_debug > 0 && this_frame != ei_local->current_page && (this_frame!=0x0 || rxing_page!=0xFF)) | |
714 | printk(KERN_ERR "%s: mismatched read page pointers %2x vs %2x.\n", | |
715 | dev->name, this_frame, ei_local->current_page); | |
716 | ||
717 | if (this_frame == rxing_page) /* Read all the frames? */ | |
718 | break; /* Done for now */ | |
719 | ||
720 | current_offset = this_frame << 8; | |
721 | ei_get_8390_hdr(dev, &rx_frame, this_frame); | |
722 | ||
723 | pkt_len = rx_frame.count - sizeof(struct e8390_pkt_hdr); | |
724 | pkt_stat = rx_frame.status; | |
725 | ||
726 | next_frame = this_frame + 1 + ((pkt_len+4)>>8); | |
727 | ||
728 | /* Check for bogosity warned by 3c503 book: the status byte is never | |
729 | written. This happened a lot during testing! This code should be | |
730 | cleaned up someday. */ | |
731 | if (rx_frame.next != next_frame | |
732 | && rx_frame.next != next_frame + 1 | |
733 | && rx_frame.next != next_frame - num_rx_pages | |
734 | && rx_frame.next != next_frame + 1 - num_rx_pages) { | |
735 | ei_local->current_page = rxing_page; | |
736 | ei_outb(ei_local->current_page-1, e8390_base+EN0_BOUNDARY); | |
244d74ff | 737 | dev->stats.rx_errors++; |
6c3561b0 AV |
738 | continue; |
739 | } | |
740 | ||
741 | if (pkt_len < 60 || pkt_len > 1518) | |
742 | { | |
743 | if (ei_debug) | |
744 | printk(KERN_DEBUG "%s: bogus packet size: %d, status=%#2x nxpg=%#2x.\n", | |
745 | dev->name, rx_frame.count, rx_frame.status, | |
746 | rx_frame.next); | |
244d74ff PZ |
747 | dev->stats.rx_errors++; |
748 | dev->stats.rx_length_errors++; | |
6c3561b0 AV |
749 | } |
750 | else if ((pkt_stat & 0x0F) == ENRSR_RXOK) | |
751 | { | |
752 | struct sk_buff *skb; | |
753 | ||
754 | skb = dev_alloc_skb(pkt_len+2); | |
755 | if (skb == NULL) | |
756 | { | |
757 | if (ei_debug > 1) | |
758 | printk(KERN_DEBUG "%s: Couldn't allocate a sk_buff of size %d.\n", | |
759 | dev->name, pkt_len); | |
244d74ff | 760 | dev->stats.rx_dropped++; |
6c3561b0 AV |
761 | break; |
762 | } | |
763 | else | |
764 | { | |
765 | skb_reserve(skb,2); /* IP headers on 16 byte boundaries */ | |
6c3561b0 AV |
766 | skb_put(skb, pkt_len); /* Make room */ |
767 | ei_block_input(dev, pkt_len, skb, current_offset + sizeof(rx_frame)); | |
768 | skb->protocol=eth_type_trans(skb,dev); | |
769 | netif_rx(skb); | |
244d74ff PZ |
770 | dev->stats.rx_packets++; |
771 | dev->stats.rx_bytes += pkt_len; | |
6c3561b0 | 772 | if (pkt_stat & ENRSR_PHY) |
244d74ff | 773 | dev->stats.multicast++; |
6c3561b0 AV |
774 | } |
775 | } | |
776 | else | |
777 | { | |
778 | if (ei_debug) | |
779 | printk(KERN_DEBUG "%s: bogus packet: status=%#2x nxpg=%#2x size=%d\n", | |
780 | dev->name, rx_frame.status, rx_frame.next, | |
781 | rx_frame.count); | |
244d74ff | 782 | dev->stats.rx_errors++; |
6c3561b0 AV |
783 | /* NB: The NIC counts CRC, frame and missed errors. */ |
784 | if (pkt_stat & ENRSR_FO) | |
244d74ff | 785 | dev->stats.rx_fifo_errors++; |
6c3561b0 AV |
786 | } |
787 | next_frame = rx_frame.next; | |
788 | ||
789 | /* This _should_ never happen: it's here for avoiding bad clones. */ | |
790 | if (next_frame >= ei_local->stop_page) { | |
791 | printk("%s: next frame inconsistency, %#2x\n", dev->name, | |
792 | next_frame); | |
793 | next_frame = ei_local->rx_start_page; | |
794 | } | |
795 | ei_local->current_page = next_frame; | |
796 | ei_outb_p(next_frame-1, e8390_base+EN0_BOUNDARY); | |
797 | } | |
798 | ||
799 | /* We used to also ack ENISR_OVER here, but that would sometimes mask | |
800 | a real overrun, leaving the 8390 in a stopped state with rec'vr off. */ | |
801 | ei_outb_p(ENISR_RX+ENISR_RX_ERR, e8390_base+EN0_ISR); | |
802 | return; | |
803 | } | |
804 | ||
805 | /** | |
806 | * ei_rx_overrun - handle receiver overrun | |
807 | * @dev: network device which threw exception | |
808 | * | |
809 | * We have a receiver overrun: we have to kick the 8390 to get it started | |
810 | * again. Problem is that you have to kick it exactly as NS prescribes in | |
811 | * the updated datasheets, or "the NIC may act in an unpredictable manner." | |
812 | * This includes causing "the NIC to defer indefinitely when it is stopped | |
813 | * on a busy network." Ugh. | |
814 | * Called with lock held. Don't call this with the interrupts off or your | |
815 | * computer will hate you - it takes 10ms or so. | |
816 | */ | |
817 | ||
818 | static void ei_rx_overrun(struct net_device *dev) | |
819 | { | |
820 | unsigned long e8390_base = dev->base_addr; | |
821 | unsigned char was_txing, must_resend = 0; | |
0c1aa20f SR |
822 | /* ei_local is used on some platforms via the EI_SHIFT macro */ |
823 | struct ei_device *ei_local __maybe_unused = netdev_priv(dev); | |
6c3561b0 AV |
824 | |
825 | /* | |
826 | * Record whether a Tx was in progress and then issue the | |
827 | * stop command. | |
828 | */ | |
829 | was_txing = ei_inb_p(e8390_base+E8390_CMD) & E8390_TRANS; | |
830 | ei_outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base+E8390_CMD); | |
831 | ||
832 | if (ei_debug > 1) | |
833 | printk(KERN_DEBUG "%s: Receiver overrun.\n", dev->name); | |
244d74ff | 834 | dev->stats.rx_over_errors++; |
6c3561b0 AV |
835 | |
836 | /* | |
837 | * Wait a full Tx time (1.2ms) + some guard time, NS says 1.6ms total. | |
838 | * Early datasheets said to poll the reset bit, but now they say that | |
839 | * it "is not a reliable indicator and subsequently should be ignored." | |
840 | * We wait at least 10ms. | |
841 | */ | |
842 | ||
843 | mdelay(10); | |
844 | ||
845 | /* | |
846 | * Reset RBCR[01] back to zero as per magic incantation. | |
847 | */ | |
848 | ei_outb_p(0x00, e8390_base+EN0_RCNTLO); | |
849 | ei_outb_p(0x00, e8390_base+EN0_RCNTHI); | |
850 | ||
851 | /* | |
852 | * See if any Tx was interrupted or not. According to NS, this | |
853 | * step is vital, and skipping it will cause no end of havoc. | |
854 | */ | |
855 | ||
856 | if (was_txing) | |
857 | { | |
858 | unsigned char tx_completed = ei_inb_p(e8390_base+EN0_ISR) & (ENISR_TX+ENISR_TX_ERR); | |
859 | if (!tx_completed) | |
860 | must_resend = 1; | |
861 | } | |
862 | ||
863 | /* | |
864 | * Have to enter loopback mode and then restart the NIC before | |
865 | * you are allowed to slurp packets up off the ring. | |
866 | */ | |
867 | ei_outb_p(E8390_TXOFF, e8390_base + EN0_TXCR); | |
868 | ei_outb_p(E8390_NODMA + E8390_PAGE0 + E8390_START, e8390_base + E8390_CMD); | |
869 | ||
870 | /* | |
871 | * Clear the Rx ring of all the debris, and ack the interrupt. | |
872 | */ | |
873 | ei_receive(dev); | |
874 | ei_outb_p(ENISR_OVER, e8390_base+EN0_ISR); | |
875 | ||
876 | /* | |
877 | * Leave loopback mode, and resend any packet that got stopped. | |
878 | */ | |
879 | ei_outb_p(E8390_TXCONFIG, e8390_base + EN0_TXCR); | |
880 | if (must_resend) | |
881 | ei_outb_p(E8390_NODMA + E8390_PAGE0 + E8390_START + E8390_TRANS, e8390_base + E8390_CMD); | |
882 | } | |
883 | ||
884 | /* | |
885 | * Collect the stats. This is called unlocked and from several contexts. | |
886 | */ | |
887 | ||
4e4fd4e4 | 888 | struct net_device_stats *ei_get_stats(struct net_device *dev) |
6c3561b0 AV |
889 | { |
890 | unsigned long ioaddr = dev->base_addr; | |
891 | struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev); | |
892 | unsigned long flags; | |
893 | ||
894 | /* If the card is stopped, just return the present stats. */ | |
895 | if (!netif_running(dev)) | |
244d74ff | 896 | return &dev->stats; |
6c3561b0 AV |
897 | |
898 | spin_lock_irqsave(&ei_local->page_lock,flags); | |
899 | /* Read the counter registers, assuming we are in page 0. */ | |
244d74ff PZ |
900 | dev->stats.rx_frame_errors += ei_inb_p(ioaddr + EN0_COUNTER0); |
901 | dev->stats.rx_crc_errors += ei_inb_p(ioaddr + EN0_COUNTER1); | |
902 | dev->stats.rx_missed_errors+= ei_inb_p(ioaddr + EN0_COUNTER2); | |
6c3561b0 AV |
903 | spin_unlock_irqrestore(&ei_local->page_lock, flags); |
904 | ||
244d74ff | 905 | return &dev->stats; |
6c3561b0 | 906 | } |
4e4fd4e4 | 907 | EXPORT_SYMBOL_GPL(ei_get_stats); |
6c3561b0 AV |
908 | |
909 | /* | |
910 | * Form the 64 bit 8390 multicast table from the linked list of addresses | |
911 | * associated with this dev structure. | |
912 | */ | |
913 | ||
914 | static inline void make_mc_bits(u8 *bits, struct net_device *dev) | |
915 | { | |
916 | struct dev_mc_list *dmi; | |
917 | ||
918 | for (dmi=dev->mc_list; dmi; dmi=dmi->next) | |
919 | { | |
920 | u32 crc; | |
921 | if (dmi->dmi_addrlen != ETH_ALEN) | |
922 | { | |
923 | printk(KERN_INFO "%s: invalid multicast address length given.\n", dev->name); | |
924 | continue; | |
925 | } | |
926 | crc = ether_crc(ETH_ALEN, dmi->dmi_addr); | |
927 | /* | |
928 | * The 8390 uses the 6 most significant bits of the | |
929 | * CRC to index the multicast table. | |
930 | */ | |
931 | bits[crc>>29] |= (1<<((crc>>26)&7)); | |
932 | } | |
933 | } | |
934 | ||
935 | /** | |
936 | * do_set_multicast_list - set/clear multicast filter | |
937 | * @dev: net device for which multicast filter is adjusted | |
938 | * | |
939 | * Set or clear the multicast filter for this adaptor. May be called | |
940 | * from a BH in 2.1.x. Must be called with lock held. | |
941 | */ | |
942 | ||
943 | static void do_set_multicast_list(struct net_device *dev) | |
944 | { | |
945 | unsigned long e8390_base = dev->base_addr; | |
946 | int i; | |
947 | struct ei_device *ei_local = (struct ei_device*)netdev_priv(dev); | |
948 | ||
949 | if (!(dev->flags&(IFF_PROMISC|IFF_ALLMULTI))) | |
950 | { | |
951 | memset(ei_local->mcfilter, 0, 8); | |
952 | if (dev->mc_list) | |
953 | make_mc_bits(ei_local->mcfilter, dev); | |
954 | } | |
955 | else | |
956 | memset(ei_local->mcfilter, 0xFF, 8); /* mcast set to accept-all */ | |
957 | ||
958 | /* | |
959 | * DP8390 manuals don't specify any magic sequence for altering | |
960 | * the multicast regs on an already running card. To be safe, we | |
961 | * ensure multicast mode is off prior to loading up the new hash | |
962 | * table. If this proves to be not enough, we can always resort | |
963 | * to stopping the NIC, loading the table and then restarting. | |
964 | * | |
965 | * Bug Alert! The MC regs on the SMC 83C690 (SMC Elite and SMC | |
966 | * Elite16) appear to be write-only. The NS 8390 data sheet lists | |
967 | * them as r/w so this is a bug. The SMC 83C790 (SMC Ultra and | |
968 | * Ultra32 EISA) appears to have this bug fixed. | |
969 | */ | |
970 | ||
971 | if (netif_running(dev)) | |
972 | ei_outb_p(E8390_RXCONFIG, e8390_base + EN0_RXCR); | |
973 | ei_outb_p(E8390_NODMA + E8390_PAGE1, e8390_base + E8390_CMD); | |
974 | for(i = 0; i < 8; i++) | |
975 | { | |
976 | ei_outb_p(ei_local->mcfilter[i], e8390_base + EN1_MULT_SHIFT(i)); | |
977 | #ifndef BUG_83C690 | |
978 | if(ei_inb_p(e8390_base + EN1_MULT_SHIFT(i))!=ei_local->mcfilter[i]) | |
979 | printk(KERN_ERR "Multicast filter read/write mismap %d\n",i); | |
980 | #endif | |
981 | } | |
982 | ei_outb_p(E8390_NODMA + E8390_PAGE0, e8390_base + E8390_CMD); | |
983 | ||
984 | if(dev->flags&IFF_PROMISC) | |
985 | ei_outb_p(E8390_RXCONFIG | 0x18, e8390_base + EN0_RXCR); | |
986 | else if(dev->flags&IFF_ALLMULTI || dev->mc_list) | |
987 | ei_outb_p(E8390_RXCONFIG | 0x08, e8390_base + EN0_RXCR); | |
988 | else | |
989 | ei_outb_p(E8390_RXCONFIG, e8390_base + EN0_RXCR); | |
990 | } | |
991 | ||
992 | /* | |
993 | * Called without lock held. This is invoked from user context and may | |
994 | * be parallel to just about everything else. Its also fairly quick and | |
995 | * not called too often. Must protect against both bh and irq users | |
996 | */ | |
997 | ||
4e4fd4e4 | 998 | void ei_set_multicast_list(struct net_device *dev) |
6c3561b0 AV |
999 | { |
1000 | unsigned long flags; | |
1001 | struct ei_device *ei_local = (struct ei_device*)netdev_priv(dev); | |
1002 | ||
1003 | spin_lock_irqsave(&ei_local->page_lock, flags); | |
1004 | do_set_multicast_list(dev); | |
1005 | spin_unlock_irqrestore(&ei_local->page_lock, flags); | |
1006 | } | |
4e4fd4e4 | 1007 | EXPORT_SYMBOL_GPL(ei_set_multicast_list); |
6c3561b0 AV |
1008 | |
1009 | /** | |
1010 | * ethdev_setup - init rest of 8390 device struct | |
1011 | * @dev: network device structure to init | |
1012 | * | |
1013 | * Initialize the rest of the 8390 device structure. Do NOT __init | |
1014 | * this, as it is used by 8390 based modular drivers too. | |
1015 | */ | |
1016 | ||
1017 | static void ethdev_setup(struct net_device *dev) | |
1018 | { | |
1019 | struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev); | |
1020 | if (ei_debug > 1) | |
1021 | printk(version); | |
1022 | ||
4e4fd4e4 SH |
1023 | #ifdef CONFIG_COMPAT_NET_DEV_OPS |
1024 | dev->hard_start_xmit = ei_start_xmit; | |
1025 | dev->get_stats = ei_get_stats; | |
1026 | dev->set_multicast_list = ei_set_multicast_list; | |
1027 | #endif | |
6c3561b0 AV |
1028 | ether_setup(dev); |
1029 | ||
1030 | spin_lock_init(&ei_local->page_lock); | |
1031 | } | |
1032 | ||
1033 | /** | |
1034 | * alloc_ei_netdev - alloc_etherdev counterpart for 8390 | |
1035 | * @size: extra bytes to allocate | |
1036 | * | |
1037 | * Allocate 8390-specific net_device. | |
1038 | */ | |
1039 | static struct net_device *____alloc_ei_netdev(int size) | |
1040 | { | |
1041 | return alloc_netdev(sizeof(struct ei_device) + size, "eth%d", | |
1042 | ethdev_setup); | |
1043 | } | |
1044 | ||
1045 | ||
1046 | ||
1047 | ||
1048 | /* This page of functions should be 8390 generic */ | |
1049 | /* Follow National Semi's recommendations for initializing the "NIC". */ | |
1050 | ||
1051 | /** | |
1052 | * NS8390_init - initialize 8390 hardware | |
1053 | * @dev: network device to initialize | |
1054 | * @startp: boolean. non-zero value to initiate chip processing | |
1055 | * | |
1056 | * Must be called with lock held. | |
1057 | */ | |
1058 | ||
1059 | static void __NS8390_init(struct net_device *dev, int startp) | |
1060 | { | |
1061 | unsigned long e8390_base = dev->base_addr; | |
1062 | struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev); | |
1063 | int i; | |
1064 | int endcfg = ei_local->word16 | |
1065 | ? (0x48 | ENDCFG_WTS | (ei_local->bigendian ? ENDCFG_BOS : 0)) | |
1066 | : 0x48; | |
1067 | ||
1068 | if(sizeof(struct e8390_pkt_hdr)!=4) | |
1069 | panic("8390.c: header struct mispacked\n"); | |
1070 | /* Follow National Semi's recommendations for initing the DP83902. */ | |
1071 | ei_outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base+E8390_CMD); /* 0x21 */ | |
1072 | ei_outb_p(endcfg, e8390_base + EN0_DCFG); /* 0x48 or 0x49 */ | |
1073 | /* Clear the remote byte count registers. */ | |
1074 | ei_outb_p(0x00, e8390_base + EN0_RCNTLO); | |
1075 | ei_outb_p(0x00, e8390_base + EN0_RCNTHI); | |
1076 | /* Set to monitor and loopback mode -- this is vital!. */ | |
1077 | ei_outb_p(E8390_RXOFF, e8390_base + EN0_RXCR); /* 0x20 */ | |
1078 | ei_outb_p(E8390_TXOFF, e8390_base + EN0_TXCR); /* 0x02 */ | |
1079 | /* Set the transmit page and receive ring. */ | |
1080 | ei_outb_p(ei_local->tx_start_page, e8390_base + EN0_TPSR); | |
1081 | ei_local->tx1 = ei_local->tx2 = 0; | |
1082 | ei_outb_p(ei_local->rx_start_page, e8390_base + EN0_STARTPG); | |
1083 | ei_outb_p(ei_local->stop_page-1, e8390_base + EN0_BOUNDARY); /* 3c503 says 0x3f,NS0x26*/ | |
1084 | ei_local->current_page = ei_local->rx_start_page; /* assert boundary+1 */ | |
1085 | ei_outb_p(ei_local->stop_page, e8390_base + EN0_STOPPG); | |
1086 | /* Clear the pending interrupts and mask. */ | |
1087 | ei_outb_p(0xFF, e8390_base + EN0_ISR); | |
1088 | ei_outb_p(0x00, e8390_base + EN0_IMR); | |
1089 | ||
1090 | /* Copy the station address into the DS8390 registers. */ | |
1091 | ||
1092 | ei_outb_p(E8390_NODMA + E8390_PAGE1 + E8390_STOP, e8390_base+E8390_CMD); /* 0x61 */ | |
1093 | for(i = 0; i < 6; i++) | |
1094 | { | |
1095 | ei_outb_p(dev->dev_addr[i], e8390_base + EN1_PHYS_SHIFT(i)); | |
1096 | if (ei_debug > 1 && ei_inb_p(e8390_base + EN1_PHYS_SHIFT(i))!=dev->dev_addr[i]) | |
1097 | printk(KERN_ERR "Hw. address read/write mismap %d\n",i); | |
1098 | } | |
1099 | ||
1100 | ei_outb_p(ei_local->rx_start_page, e8390_base + EN1_CURPAG); | |
1101 | ei_outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base+E8390_CMD); | |
1102 | ||
1103 | netif_start_queue(dev); | |
1104 | ei_local->tx1 = ei_local->tx2 = 0; | |
1105 | ei_local->txing = 0; | |
1106 | ||
1107 | if (startp) | |
1108 | { | |
1109 | ei_outb_p(0xff, e8390_base + EN0_ISR); | |
1110 | ei_outb_p(ENISR_ALL, e8390_base + EN0_IMR); | |
1111 | ei_outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, e8390_base+E8390_CMD); | |
1112 | ei_outb_p(E8390_TXCONFIG, e8390_base + EN0_TXCR); /* xmit on. */ | |
1113 | /* 3c503 TechMan says rxconfig only after the NIC is started. */ | |
1114 | ei_outb_p(E8390_RXCONFIG, e8390_base + EN0_RXCR); /* rx on, */ | |
1115 | do_set_multicast_list(dev); /* (re)load the mcast table */ | |
1116 | } | |
1117 | } | |
1118 | ||
1119 | /* Trigger a transmit start, assuming the length is valid. | |
1120 | Always called with the page lock held */ | |
1121 | ||
1122 | static void NS8390_trigger_send(struct net_device *dev, unsigned int length, | |
1123 | int start_page) | |
1124 | { | |
1125 | unsigned long e8390_base = dev->base_addr; | |
1126 | struct ei_device *ei_local __attribute((unused)) = (struct ei_device *) netdev_priv(dev); | |
1127 | ||
1128 | ei_outb_p(E8390_NODMA+E8390_PAGE0, e8390_base+E8390_CMD); | |
1129 | ||
1130 | if (ei_inb_p(e8390_base + E8390_CMD) & E8390_TRANS) | |
1131 | { | |
1132 | printk(KERN_WARNING "%s: trigger_send() called with the transmitter busy.\n", | |
1133 | dev->name); | |
1134 | return; | |
1135 | } | |
1136 | ei_outb_p(length & 0xff, e8390_base + EN0_TCNTLO); | |
1137 | ei_outb_p(length >> 8, e8390_base + EN0_TCNTHI); | |
1138 | ei_outb_p(start_page, e8390_base + EN0_TPSR); | |
1139 | ei_outb_p(E8390_NODMA+E8390_TRANS+E8390_START, e8390_base+E8390_CMD); | |
1140 | } |