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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); | |
111 | static void ei_tx_timeout(struct net_device *dev); | |
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); | |
118 | static void set_multicast_list(struct net_device *dev); | |
119 | static void do_set_multicast_list(struct net_device *dev); | |
120 | static void __NS8390_init(struct net_device *dev, int startp); | |
121 | ||
122 | /* | |
123 | * SMP and the 8390 setup. | |
124 | * | |
125 | * The 8390 isnt exactly designed to be multithreaded on RX/TX. There is | |
126 | * a page register that controls bank and packet buffer access. We guard | |
127 | * this with ei_local->page_lock. Nobody should assume or set the page other | |
128 | * than zero when the lock is not held. Lock holders must restore page 0 | |
129 | * before unlocking. Even pure readers must take the lock to protect in | |
130 | * page 0. | |
131 | * | |
132 | * To make life difficult the chip can also be very slow. We therefore can't | |
133 | * just use spinlocks. For the longer lockups we disable the irq the device | |
134 | * sits on and hold the lock. We must hold the lock because there is a dual | |
135 | * processor case other than interrupts (get stats/set multicast list in | |
136 | * parallel with each other and transmit). | |
137 | * | |
138 | * Note: in theory we can just disable the irq on the card _but_ there is | |
139 | * a latency on SMP irq delivery. So we can easily go "disable irq" "sync irqs" | |
140 | * enter lock, take the queued irq. So we waddle instead of flying. | |
141 | * | |
142 | * Finally by special arrangement for the purpose of being generally | |
143 | * annoying the transmit function is called bh atomic. That places | |
144 | * restrictions on the user context callers as disable_irq won't save | |
145 | * them. | |
146 | */ | |
147 | ||
148 | ||
149 | ||
150 | /** | |
151 | * ei_open - Open/initialize the board. | |
152 | * @dev: network device to initialize | |
153 | * | |
154 | * This routine goes all-out, setting everything | |
155 | * up anew at each open, even though many of these registers should only | |
156 | * need to be set once at boot. | |
157 | */ | |
158 | static int __ei_open(struct net_device *dev) | |
159 | { | |
160 | unsigned long flags; | |
161 | struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev); | |
162 | ||
163 | /* The card I/O part of the driver (e.g. 3c503) can hook a Tx timeout | |
164 | wrapper that does e.g. media check & then calls ei_tx_timeout. */ | |
165 | if (dev->tx_timeout == NULL) | |
166 | dev->tx_timeout = ei_tx_timeout; | |
167 | if (dev->watchdog_timeo <= 0) | |
168 | dev->watchdog_timeo = TX_TIMEOUT; | |
169 | ||
170 | /* | |
171 | * Grab the page lock so we own the register set, then call | |
172 | * the init function. | |
173 | */ | |
174 | ||
175 | spin_lock_irqsave(&ei_local->page_lock, flags); | |
176 | __NS8390_init(dev, 1); | |
177 | /* Set the flag before we drop the lock, That way the IRQ arrives | |
178 | after its set and we get no silly warnings */ | |
179 | netif_start_queue(dev); | |
180 | spin_unlock_irqrestore(&ei_local->page_lock, flags); | |
181 | ei_local->irqlock = 0; | |
182 | return 0; | |
183 | } | |
184 | ||
185 | /** | |
186 | * ei_close - shut down network device | |
187 | * @dev: network device to close | |
188 | * | |
189 | * Opposite of ei_open(). Only used when "ifconfig <devname> down" is done. | |
190 | */ | |
191 | static int __ei_close(struct net_device *dev) | |
192 | { | |
193 | struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev); | |
194 | unsigned long flags; | |
195 | ||
196 | /* | |
197 | * Hold the page lock during close | |
198 | */ | |
199 | ||
200 | spin_lock_irqsave(&ei_local->page_lock, flags); | |
201 | __NS8390_init(dev, 0); | |
202 | spin_unlock_irqrestore(&ei_local->page_lock, flags); | |
203 | netif_stop_queue(dev); | |
204 | return 0; | |
205 | } | |
206 | ||
207 | /** | |
208 | * ei_tx_timeout - handle transmit time out condition | |
209 | * @dev: network device which has apparently fallen asleep | |
210 | * | |
211 | * Called by kernel when device never acknowledges a transmit has | |
212 | * completed (or failed) - i.e. never posted a Tx related interrupt. | |
213 | */ | |
214 | ||
215 | static void ei_tx_timeout(struct net_device *dev) | |
216 | { | |
217 | unsigned long e8390_base = dev->base_addr; | |
218 | struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev); | |
219 | int txsr, isr, tickssofar = jiffies - dev->trans_start; | |
220 | unsigned long flags; | |
221 | ||
222 | #if defined(CONFIG_M32R) && defined(CONFIG_SMP) | |
223 | unsigned long icucr; | |
224 | ||
225 | local_irq_save(flags); | |
226 | icucr = inl(M32R_ICU_CR1_PORTL); | |
227 | icucr |= M32R_ICUCR_ISMOD11; | |
228 | outl(icucr, M32R_ICU_CR1_PORTL); | |
229 | local_irq_restore(flags); | |
230 | #endif | |
231 | ei_local->stat.tx_errors++; | |
232 | ||
233 | spin_lock_irqsave(&ei_local->page_lock, flags); | |
234 | txsr = ei_inb(e8390_base+EN0_TSR); | |
235 | isr = ei_inb(e8390_base+EN0_ISR); | |
236 | spin_unlock_irqrestore(&ei_local->page_lock, flags); | |
237 | ||
238 | printk(KERN_DEBUG "%s: Tx timed out, %s TSR=%#2x, ISR=%#2x, t=%d.\n", | |
239 | dev->name, (txsr & ENTSR_ABT) ? "excess collisions." : | |
240 | (isr) ? "lost interrupt?" : "cable problem?", txsr, isr, tickssofar); | |
241 | ||
242 | if (!isr && !ei_local->stat.tx_packets) | |
243 | { | |
244 | /* The 8390 probably hasn't gotten on the cable yet. */ | |
245 | ei_local->interface_num ^= 1; /* Try a different xcvr. */ | |
246 | } | |
247 | ||
248 | /* Ugly but a reset can be slow, yet must be protected */ | |
249 | ||
250 | disable_irq_nosync_lockdep(dev->irq); | |
251 | spin_lock(&ei_local->page_lock); | |
252 | ||
253 | /* Try to restart the card. Perhaps the user has fixed something. */ | |
254 | ei_reset_8390(dev); | |
255 | __NS8390_init(dev, 1); | |
256 | ||
257 | spin_unlock(&ei_local->page_lock); | |
258 | enable_irq_lockdep(dev->irq); | |
259 | netif_wake_queue(dev); | |
260 | } | |
261 | ||
262 | /** | |
263 | * ei_start_xmit - begin packet transmission | |
264 | * @skb: packet to be sent | |
265 | * @dev: network device to which packet is sent | |
266 | * | |
267 | * Sends a packet to an 8390 network device. | |
268 | */ | |
269 | ||
270 | static int ei_start_xmit(struct sk_buff *skb, struct net_device *dev) | |
271 | { | |
272 | unsigned long e8390_base = dev->base_addr; | |
273 | struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev); | |
274 | int send_length = skb->len, output_page; | |
275 | unsigned long flags; | |
276 | char buf[ETH_ZLEN]; | |
277 | char *data = skb->data; | |
278 | ||
279 | if (skb->len < ETH_ZLEN) { | |
280 | memset(buf, 0, ETH_ZLEN); /* more efficient than doing just the needed bits */ | |
281 | memcpy(buf, data, skb->len); | |
282 | send_length = ETH_ZLEN; | |
283 | data = buf; | |
284 | } | |
285 | ||
286 | /* Mask interrupts from the ethercard. | |
287 | SMP: We have to grab the lock here otherwise the IRQ handler | |
288 | on another CPU can flip window and race the IRQ mask set. We end | |
289 | up trashing the mcast filter not disabling irqs if we don't lock */ | |
290 | ||
291 | spin_lock_irqsave(&ei_local->page_lock, flags); | |
292 | ei_outb_p(0x00, e8390_base + EN0_IMR); | |
293 | spin_unlock_irqrestore(&ei_local->page_lock, flags); | |
294 | ||
295 | ||
296 | /* | |
297 | * Slow phase with lock held. | |
298 | */ | |
299 | ||
300 | disable_irq_nosync_lockdep_irqsave(dev->irq, &flags); | |
301 | ||
302 | spin_lock(&ei_local->page_lock); | |
303 | ||
304 | ei_local->irqlock = 1; | |
305 | ||
306 | /* | |
307 | * We have two Tx slots available for use. Find the first free | |
308 | * slot, and then perform some sanity checks. With two Tx bufs, | |
309 | * you get very close to transmitting back-to-back packets. With | |
310 | * only one Tx buf, the transmitter sits idle while you reload the | |
311 | * card, leaving a substantial gap between each transmitted packet. | |
312 | */ | |
313 | ||
314 | if (ei_local->tx1 == 0) | |
315 | { | |
316 | output_page = ei_local->tx_start_page; | |
317 | ei_local->tx1 = send_length; | |
318 | if (ei_debug && ei_local->tx2 > 0) | |
319 | printk(KERN_DEBUG "%s: idle transmitter tx2=%d, lasttx=%d, txing=%d.\n", | |
320 | dev->name, ei_local->tx2, ei_local->lasttx, ei_local->txing); | |
321 | } | |
322 | else if (ei_local->tx2 == 0) | |
323 | { | |
324 | output_page = ei_local->tx_start_page + TX_PAGES/2; | |
325 | ei_local->tx2 = send_length; | |
326 | if (ei_debug && ei_local->tx1 > 0) | |
327 | printk(KERN_DEBUG "%s: idle transmitter, tx1=%d, lasttx=%d, txing=%d.\n", | |
328 | dev->name, ei_local->tx1, ei_local->lasttx, ei_local->txing); | |
329 | } | |
330 | else | |
331 | { /* We should never get here. */ | |
332 | if (ei_debug) | |
333 | printk(KERN_DEBUG "%s: No Tx buffers free! tx1=%d tx2=%d last=%d\n", | |
334 | dev->name, ei_local->tx1, ei_local->tx2, ei_local->lasttx); | |
335 | ei_local->irqlock = 0; | |
336 | netif_stop_queue(dev); | |
337 | ei_outb_p(ENISR_ALL, e8390_base + EN0_IMR); | |
338 | spin_unlock(&ei_local->page_lock); | |
339 | enable_irq_lockdep_irqrestore(dev->irq, &flags); | |
340 | ei_local->stat.tx_errors++; | |
341 | return 1; | |
342 | } | |
343 | ||
344 | /* | |
345 | * Okay, now upload the packet and trigger a send if the transmitter | |
346 | * isn't already sending. If it is busy, the interrupt handler will | |
347 | * trigger the send later, upon receiving a Tx done interrupt. | |
348 | */ | |
349 | ||
350 | ei_block_output(dev, send_length, data, output_page); | |
351 | ||
352 | if (! ei_local->txing) | |
353 | { | |
354 | ei_local->txing = 1; | |
355 | NS8390_trigger_send(dev, send_length, output_page); | |
356 | dev->trans_start = jiffies; | |
357 | if (output_page == ei_local->tx_start_page) | |
358 | { | |
359 | ei_local->tx1 = -1; | |
360 | ei_local->lasttx = -1; | |
361 | } | |
362 | else | |
363 | { | |
364 | ei_local->tx2 = -1; | |
365 | ei_local->lasttx = -2; | |
366 | } | |
367 | } | |
368 | else ei_local->txqueue++; | |
369 | ||
370 | if (ei_local->tx1 && ei_local->tx2) | |
371 | netif_stop_queue(dev); | |
372 | else | |
373 | netif_start_queue(dev); | |
374 | ||
375 | /* Turn 8390 interrupts back on. */ | |
376 | ei_local->irqlock = 0; | |
377 | ei_outb_p(ENISR_ALL, e8390_base + EN0_IMR); | |
378 | ||
379 | spin_unlock(&ei_local->page_lock); | |
380 | enable_irq_lockdep_irqrestore(dev->irq, &flags); | |
381 | ||
382 | dev_kfree_skb (skb); | |
383 | ei_local->stat.tx_bytes += send_length; | |
384 | ||
385 | return 0; | |
386 | } | |
387 | ||
388 | /** | |
389 | * ei_interrupt - handle the interrupts from an 8390 | |
390 | * @irq: interrupt number | |
391 | * @dev_id: a pointer to the net_device | |
392 | * | |
393 | * Handle the ether interface interrupts. We pull packets from | |
394 | * the 8390 via the card specific functions and fire them at the networking | |
395 | * stack. We also handle transmit completions and wake the transmit path if | |
396 | * necessary. We also update the counters and do other housekeeping as | |
397 | * needed. | |
398 | */ | |
399 | ||
400 | static irqreturn_t __ei_interrupt(int irq, void *dev_id) | |
401 | { | |
402 | struct net_device *dev = dev_id; | |
403 | unsigned long e8390_base = dev->base_addr; | |
404 | int interrupts, nr_serviced = 0; | |
405 | struct ei_device *ei_local = netdev_priv(dev); | |
406 | ||
407 | /* | |
408 | * Protect the irq test too. | |
409 | */ | |
410 | ||
411 | spin_lock(&ei_local->page_lock); | |
412 | ||
413 | if (ei_local->irqlock) | |
414 | { | |
415 | #if 1 /* This might just be an interrupt for a PCI device sharing this line */ | |
416 | /* The "irqlock" check is only for testing. */ | |
417 | printk(ei_local->irqlock | |
418 | ? "%s: Interrupted while interrupts are masked! isr=%#2x imr=%#2x.\n" | |
419 | : "%s: Reentering the interrupt handler! isr=%#2x imr=%#2x.\n", | |
420 | dev->name, ei_inb_p(e8390_base + EN0_ISR), | |
421 | ei_inb_p(e8390_base + EN0_IMR)); | |
422 | #endif | |
423 | spin_unlock(&ei_local->page_lock); | |
424 | return IRQ_NONE; | |
425 | } | |
426 | ||
427 | /* Change to page 0 and read the intr status reg. */ | |
428 | ei_outb_p(E8390_NODMA+E8390_PAGE0, e8390_base + E8390_CMD); | |
429 | if (ei_debug > 3) | |
430 | printk(KERN_DEBUG "%s: interrupt(isr=%#2.2x).\n", dev->name, | |
431 | ei_inb_p(e8390_base + EN0_ISR)); | |
432 | ||
433 | /* !!Assumption!! -- we stay in page 0. Don't break this. */ | |
434 | while ((interrupts = ei_inb_p(e8390_base + EN0_ISR)) != 0 | |
435 | && ++nr_serviced < MAX_SERVICE) | |
436 | { | |
437 | if (!netif_running(dev)) { | |
438 | printk(KERN_WARNING "%s: interrupt from stopped card\n", dev->name); | |
439 | /* rmk - acknowledge the interrupts */ | |
440 | ei_outb_p(interrupts, e8390_base + EN0_ISR); | |
441 | interrupts = 0; | |
442 | break; | |
443 | } | |
444 | if (interrupts & ENISR_OVER) | |
445 | ei_rx_overrun(dev); | |
446 | else if (interrupts & (ENISR_RX+ENISR_RX_ERR)) | |
447 | { | |
448 | /* Got a good (?) packet. */ | |
449 | ei_receive(dev); | |
450 | } | |
451 | /* Push the next to-transmit packet through. */ | |
452 | if (interrupts & ENISR_TX) | |
453 | ei_tx_intr(dev); | |
454 | else if (interrupts & ENISR_TX_ERR) | |
455 | ei_tx_err(dev); | |
456 | ||
457 | if (interrupts & ENISR_COUNTERS) | |
458 | { | |
459 | ei_local->stat.rx_frame_errors += ei_inb_p(e8390_base + EN0_COUNTER0); | |
460 | ei_local->stat.rx_crc_errors += ei_inb_p(e8390_base + EN0_COUNTER1); | |
461 | ei_local->stat.rx_missed_errors+= ei_inb_p(e8390_base + EN0_COUNTER2); | |
462 | ei_outb_p(ENISR_COUNTERS, e8390_base + EN0_ISR); /* Ack intr. */ | |
463 | } | |
464 | ||
465 | /* Ignore any RDC interrupts that make it back to here. */ | |
466 | if (interrupts & ENISR_RDC) | |
467 | { | |
468 | ei_outb_p(ENISR_RDC, e8390_base + EN0_ISR); | |
469 | } | |
470 | ||
471 | ei_outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, e8390_base + E8390_CMD); | |
472 | } | |
473 | ||
474 | if (interrupts && ei_debug) | |
475 | { | |
476 | ei_outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, e8390_base + E8390_CMD); | |
477 | if (nr_serviced >= MAX_SERVICE) | |
478 | { | |
479 | /* 0xFF is valid for a card removal */ | |
480 | if(interrupts!=0xFF) | |
481 | printk(KERN_WARNING "%s: Too much work at interrupt, status %#2.2x\n", | |
482 | dev->name, interrupts); | |
483 | ei_outb_p(ENISR_ALL, e8390_base + EN0_ISR); /* Ack. most intrs. */ | |
484 | } else { | |
485 | printk(KERN_WARNING "%s: unknown interrupt %#2x\n", dev->name, interrupts); | |
486 | ei_outb_p(0xff, e8390_base + EN0_ISR); /* Ack. all intrs. */ | |
487 | } | |
488 | } | |
489 | spin_unlock(&ei_local->page_lock); | |
490 | return IRQ_RETVAL(nr_serviced > 0); | |
491 | } | |
492 | ||
493 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
494 | static void __ei_poll(struct net_device *dev) | |
495 | { | |
496 | disable_irq_lockdep(dev->irq); | |
497 | __ei_interrupt(dev->irq, dev); | |
498 | enable_irq_lockdep(dev->irq); | |
499 | } | |
500 | #endif | |
501 | ||
502 | /** | |
503 | * ei_tx_err - handle transmitter error | |
504 | * @dev: network device which threw the exception | |
505 | * | |
506 | * A transmitter error has happened. Most likely excess collisions (which | |
507 | * is a fairly normal condition). If the error is one where the Tx will | |
508 | * have been aborted, we try and send another one right away, instead of | |
509 | * letting the failed packet sit and collect dust in the Tx buffer. This | |
510 | * is a much better solution as it avoids kernel based Tx timeouts, and | |
511 | * an unnecessary card reset. | |
512 | * | |
513 | * Called with lock held. | |
514 | */ | |
515 | ||
516 | static void ei_tx_err(struct net_device *dev) | |
517 | { | |
518 | unsigned long e8390_base = dev->base_addr; | |
519 | struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev); | |
520 | unsigned char txsr = ei_inb_p(e8390_base+EN0_TSR); | |
521 | unsigned char tx_was_aborted = txsr & (ENTSR_ABT+ENTSR_FU); | |
522 | ||
523 | #ifdef VERBOSE_ERROR_DUMP | |
524 | printk(KERN_DEBUG "%s: transmitter error (%#2x): ", dev->name, txsr); | |
525 | if (txsr & ENTSR_ABT) | |
526 | printk("excess-collisions "); | |
527 | if (txsr & ENTSR_ND) | |
528 | printk("non-deferral "); | |
529 | if (txsr & ENTSR_CRS) | |
530 | printk("lost-carrier "); | |
531 | if (txsr & ENTSR_FU) | |
532 | printk("FIFO-underrun "); | |
533 | if (txsr & ENTSR_CDH) | |
534 | printk("lost-heartbeat "); | |
535 | printk("\n"); | |
536 | #endif | |
537 | ||
538 | ei_outb_p(ENISR_TX_ERR, e8390_base + EN0_ISR); /* Ack intr. */ | |
539 | ||
540 | if (tx_was_aborted) | |
541 | ei_tx_intr(dev); | |
542 | else | |
543 | { | |
544 | ei_local->stat.tx_errors++; | |
545 | if (txsr & ENTSR_CRS) ei_local->stat.tx_carrier_errors++; | |
546 | if (txsr & ENTSR_CDH) ei_local->stat.tx_heartbeat_errors++; | |
547 | if (txsr & ENTSR_OWC) ei_local->stat.tx_window_errors++; | |
548 | } | |
549 | } | |
550 | ||
551 | /** | |
552 | * ei_tx_intr - transmit interrupt handler | |
553 | * @dev: network device for which tx intr is handled | |
554 | * | |
555 | * We have finished a transmit: check for errors and then trigger the next | |
556 | * packet to be sent. Called with lock held. | |
557 | */ | |
558 | ||
559 | static void ei_tx_intr(struct net_device *dev) | |
560 | { | |
561 | unsigned long e8390_base = dev->base_addr; | |
562 | struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev); | |
563 | int status = ei_inb(e8390_base + EN0_TSR); | |
564 | ||
565 | ei_outb_p(ENISR_TX, e8390_base + EN0_ISR); /* Ack intr. */ | |
566 | ||
567 | /* | |
568 | * There are two Tx buffers, see which one finished, and trigger | |
569 | * the send of another one if it exists. | |
570 | */ | |
571 | ei_local->txqueue--; | |
572 | ||
573 | if (ei_local->tx1 < 0) | |
574 | { | |
575 | if (ei_local->lasttx != 1 && ei_local->lasttx != -1) | |
576 | printk(KERN_ERR "%s: bogus last_tx_buffer %d, tx1=%d.\n", | |
577 | ei_local->name, ei_local->lasttx, ei_local->tx1); | |
578 | ei_local->tx1 = 0; | |
579 | if (ei_local->tx2 > 0) | |
580 | { | |
581 | ei_local->txing = 1; | |
582 | NS8390_trigger_send(dev, ei_local->tx2, ei_local->tx_start_page + 6); | |
583 | dev->trans_start = jiffies; | |
584 | ei_local->tx2 = -1, | |
585 | ei_local->lasttx = 2; | |
586 | } | |
587 | else ei_local->lasttx = 20, ei_local->txing = 0; | |
588 | } | |
589 | else if (ei_local->tx2 < 0) | |
590 | { | |
591 | if (ei_local->lasttx != 2 && ei_local->lasttx != -2) | |
592 | printk("%s: bogus last_tx_buffer %d, tx2=%d.\n", | |
593 | ei_local->name, ei_local->lasttx, ei_local->tx2); | |
594 | ei_local->tx2 = 0; | |
595 | if (ei_local->tx1 > 0) | |
596 | { | |
597 | ei_local->txing = 1; | |
598 | NS8390_trigger_send(dev, ei_local->tx1, ei_local->tx_start_page); | |
599 | dev->trans_start = jiffies; | |
600 | ei_local->tx1 = -1; | |
601 | ei_local->lasttx = 1; | |
602 | } | |
603 | else | |
604 | ei_local->lasttx = 10, ei_local->txing = 0; | |
605 | } | |
606 | // else printk(KERN_WARNING "%s: unexpected TX-done interrupt, lasttx=%d.\n", | |
607 | // dev->name, ei_local->lasttx); | |
608 | ||
609 | /* Minimize Tx latency: update the statistics after we restart TXing. */ | |
610 | if (status & ENTSR_COL) | |
611 | ei_local->stat.collisions++; | |
612 | if (status & ENTSR_PTX) | |
613 | ei_local->stat.tx_packets++; | |
614 | else | |
615 | { | |
616 | ei_local->stat.tx_errors++; | |
617 | if (status & ENTSR_ABT) | |
618 | { | |
619 | ei_local->stat.tx_aborted_errors++; | |
620 | ei_local->stat.collisions += 16; | |
621 | } | |
622 | if (status & ENTSR_CRS) | |
623 | ei_local->stat.tx_carrier_errors++; | |
624 | if (status & ENTSR_FU) | |
625 | ei_local->stat.tx_fifo_errors++; | |
626 | if (status & ENTSR_CDH) | |
627 | ei_local->stat.tx_heartbeat_errors++; | |
628 | if (status & ENTSR_OWC) | |
629 | ei_local->stat.tx_window_errors++; | |
630 | } | |
631 | netif_wake_queue(dev); | |
632 | } | |
633 | ||
634 | /** | |
635 | * ei_receive - receive some packets | |
636 | * @dev: network device with which receive will be run | |
637 | * | |
638 | * We have a good packet(s), get it/them out of the buffers. | |
639 | * Called with lock held. | |
640 | */ | |
641 | ||
642 | static void ei_receive(struct net_device *dev) | |
643 | { | |
644 | unsigned long e8390_base = dev->base_addr; | |
645 | struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev); | |
646 | unsigned char rxing_page, this_frame, next_frame; | |
647 | unsigned short current_offset; | |
648 | int rx_pkt_count = 0; | |
649 | struct e8390_pkt_hdr rx_frame; | |
650 | int num_rx_pages = ei_local->stop_page-ei_local->rx_start_page; | |
651 | ||
652 | while (++rx_pkt_count < 10) | |
653 | { | |
654 | int pkt_len, pkt_stat; | |
655 | ||
656 | /* Get the rx page (incoming packet pointer). */ | |
657 | ei_outb_p(E8390_NODMA+E8390_PAGE1, e8390_base + E8390_CMD); | |
658 | rxing_page = ei_inb_p(e8390_base + EN1_CURPAG); | |
659 | ei_outb_p(E8390_NODMA+E8390_PAGE0, e8390_base + E8390_CMD); | |
660 | ||
661 | /* Remove one frame from the ring. Boundary is always a page behind. */ | |
662 | this_frame = ei_inb_p(e8390_base + EN0_BOUNDARY) + 1; | |
663 | if (this_frame >= ei_local->stop_page) | |
664 | this_frame = ei_local->rx_start_page; | |
665 | ||
666 | /* Someday we'll omit the previous, iff we never get this message. | |
667 | (There is at least one clone claimed to have a problem.) | |
668 | ||
669 | Keep quiet if it looks like a card removal. One problem here | |
670 | is that some clones crash in roughly the same way. | |
671 | */ | |
672 | if (ei_debug > 0 && this_frame != ei_local->current_page && (this_frame!=0x0 || rxing_page!=0xFF)) | |
673 | printk(KERN_ERR "%s: mismatched read page pointers %2x vs %2x.\n", | |
674 | dev->name, this_frame, ei_local->current_page); | |
675 | ||
676 | if (this_frame == rxing_page) /* Read all the frames? */ | |
677 | break; /* Done for now */ | |
678 | ||
679 | current_offset = this_frame << 8; | |
680 | ei_get_8390_hdr(dev, &rx_frame, this_frame); | |
681 | ||
682 | pkt_len = rx_frame.count - sizeof(struct e8390_pkt_hdr); | |
683 | pkt_stat = rx_frame.status; | |
684 | ||
685 | next_frame = this_frame + 1 + ((pkt_len+4)>>8); | |
686 | ||
687 | /* Check for bogosity warned by 3c503 book: the status byte is never | |
688 | written. This happened a lot during testing! This code should be | |
689 | cleaned up someday. */ | |
690 | if (rx_frame.next != next_frame | |
691 | && rx_frame.next != next_frame + 1 | |
692 | && rx_frame.next != next_frame - num_rx_pages | |
693 | && rx_frame.next != next_frame + 1 - num_rx_pages) { | |
694 | ei_local->current_page = rxing_page; | |
695 | ei_outb(ei_local->current_page-1, e8390_base+EN0_BOUNDARY); | |
696 | ei_local->stat.rx_errors++; | |
697 | continue; | |
698 | } | |
699 | ||
700 | if (pkt_len < 60 || pkt_len > 1518) | |
701 | { | |
702 | if (ei_debug) | |
703 | printk(KERN_DEBUG "%s: bogus packet size: %d, status=%#2x nxpg=%#2x.\n", | |
704 | dev->name, rx_frame.count, rx_frame.status, | |
705 | rx_frame.next); | |
706 | ei_local->stat.rx_errors++; | |
707 | ei_local->stat.rx_length_errors++; | |
708 | } | |
709 | else if ((pkt_stat & 0x0F) == ENRSR_RXOK) | |
710 | { | |
711 | struct sk_buff *skb; | |
712 | ||
713 | skb = dev_alloc_skb(pkt_len+2); | |
714 | if (skb == NULL) | |
715 | { | |
716 | if (ei_debug > 1) | |
717 | printk(KERN_DEBUG "%s: Couldn't allocate a sk_buff of size %d.\n", | |
718 | dev->name, pkt_len); | |
719 | ei_local->stat.rx_dropped++; | |
720 | break; | |
721 | } | |
722 | else | |
723 | { | |
724 | skb_reserve(skb,2); /* IP headers on 16 byte boundaries */ | |
725 | skb->dev = dev; | |
726 | skb_put(skb, pkt_len); /* Make room */ | |
727 | ei_block_input(dev, pkt_len, skb, current_offset + sizeof(rx_frame)); | |
728 | skb->protocol=eth_type_trans(skb,dev); | |
729 | netif_rx(skb); | |
730 | dev->last_rx = jiffies; | |
731 | ei_local->stat.rx_packets++; | |
732 | ei_local->stat.rx_bytes += pkt_len; | |
733 | if (pkt_stat & ENRSR_PHY) | |
734 | ei_local->stat.multicast++; | |
735 | } | |
736 | } | |
737 | else | |
738 | { | |
739 | if (ei_debug) | |
740 | printk(KERN_DEBUG "%s: bogus packet: status=%#2x nxpg=%#2x size=%d\n", | |
741 | dev->name, rx_frame.status, rx_frame.next, | |
742 | rx_frame.count); | |
743 | ei_local->stat.rx_errors++; | |
744 | /* NB: The NIC counts CRC, frame and missed errors. */ | |
745 | if (pkt_stat & ENRSR_FO) | |
746 | ei_local->stat.rx_fifo_errors++; | |
747 | } | |
748 | next_frame = rx_frame.next; | |
749 | ||
750 | /* This _should_ never happen: it's here for avoiding bad clones. */ | |
751 | if (next_frame >= ei_local->stop_page) { | |
752 | printk("%s: next frame inconsistency, %#2x\n", dev->name, | |
753 | next_frame); | |
754 | next_frame = ei_local->rx_start_page; | |
755 | } | |
756 | ei_local->current_page = next_frame; | |
757 | ei_outb_p(next_frame-1, e8390_base+EN0_BOUNDARY); | |
758 | } | |
759 | ||
760 | /* We used to also ack ENISR_OVER here, but that would sometimes mask | |
761 | a real overrun, leaving the 8390 in a stopped state with rec'vr off. */ | |
762 | ei_outb_p(ENISR_RX+ENISR_RX_ERR, e8390_base+EN0_ISR); | |
763 | return; | |
764 | } | |
765 | ||
766 | /** | |
767 | * ei_rx_overrun - handle receiver overrun | |
768 | * @dev: network device which threw exception | |
769 | * | |
770 | * We have a receiver overrun: we have to kick the 8390 to get it started | |
771 | * again. Problem is that you have to kick it exactly as NS prescribes in | |
772 | * the updated datasheets, or "the NIC may act in an unpredictable manner." | |
773 | * This includes causing "the NIC to defer indefinitely when it is stopped | |
774 | * on a busy network." Ugh. | |
775 | * Called with lock held. Don't call this with the interrupts off or your | |
776 | * computer will hate you - it takes 10ms or so. | |
777 | */ | |
778 | ||
779 | static void ei_rx_overrun(struct net_device *dev) | |
780 | { | |
781 | unsigned long e8390_base = dev->base_addr; | |
782 | unsigned char was_txing, must_resend = 0; | |
783 | struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev); | |
784 | ||
785 | /* | |
786 | * Record whether a Tx was in progress and then issue the | |
787 | * stop command. | |
788 | */ | |
789 | was_txing = ei_inb_p(e8390_base+E8390_CMD) & E8390_TRANS; | |
790 | ei_outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base+E8390_CMD); | |
791 | ||
792 | if (ei_debug > 1) | |
793 | printk(KERN_DEBUG "%s: Receiver overrun.\n", dev->name); | |
794 | ei_local->stat.rx_over_errors++; | |
795 | ||
796 | /* | |
797 | * Wait a full Tx time (1.2ms) + some guard time, NS says 1.6ms total. | |
798 | * Early datasheets said to poll the reset bit, but now they say that | |
799 | * it "is not a reliable indicator and subsequently should be ignored." | |
800 | * We wait at least 10ms. | |
801 | */ | |
802 | ||
803 | mdelay(10); | |
804 | ||
805 | /* | |
806 | * Reset RBCR[01] back to zero as per magic incantation. | |
807 | */ | |
808 | ei_outb_p(0x00, e8390_base+EN0_RCNTLO); | |
809 | ei_outb_p(0x00, e8390_base+EN0_RCNTHI); | |
810 | ||
811 | /* | |
812 | * See if any Tx was interrupted or not. According to NS, this | |
813 | * step is vital, and skipping it will cause no end of havoc. | |
814 | */ | |
815 | ||
816 | if (was_txing) | |
817 | { | |
818 | unsigned char tx_completed = ei_inb_p(e8390_base+EN0_ISR) & (ENISR_TX+ENISR_TX_ERR); | |
819 | if (!tx_completed) | |
820 | must_resend = 1; | |
821 | } | |
822 | ||
823 | /* | |
824 | * Have to enter loopback mode and then restart the NIC before | |
825 | * you are allowed to slurp packets up off the ring. | |
826 | */ | |
827 | ei_outb_p(E8390_TXOFF, e8390_base + EN0_TXCR); | |
828 | ei_outb_p(E8390_NODMA + E8390_PAGE0 + E8390_START, e8390_base + E8390_CMD); | |
829 | ||
830 | /* | |
831 | * Clear the Rx ring of all the debris, and ack the interrupt. | |
832 | */ | |
833 | ei_receive(dev); | |
834 | ei_outb_p(ENISR_OVER, e8390_base+EN0_ISR); | |
835 | ||
836 | /* | |
837 | * Leave loopback mode, and resend any packet that got stopped. | |
838 | */ | |
839 | ei_outb_p(E8390_TXCONFIG, e8390_base + EN0_TXCR); | |
840 | if (must_resend) | |
841 | ei_outb_p(E8390_NODMA + E8390_PAGE0 + E8390_START + E8390_TRANS, e8390_base + E8390_CMD); | |
842 | } | |
843 | ||
844 | /* | |
845 | * Collect the stats. This is called unlocked and from several contexts. | |
846 | */ | |
847 | ||
848 | static struct net_device_stats *get_stats(struct net_device *dev) | |
849 | { | |
850 | unsigned long ioaddr = dev->base_addr; | |
851 | struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev); | |
852 | unsigned long flags; | |
853 | ||
854 | /* If the card is stopped, just return the present stats. */ | |
855 | if (!netif_running(dev)) | |
856 | return &ei_local->stat; | |
857 | ||
858 | spin_lock_irqsave(&ei_local->page_lock,flags); | |
859 | /* Read the counter registers, assuming we are in page 0. */ | |
860 | ei_local->stat.rx_frame_errors += ei_inb_p(ioaddr + EN0_COUNTER0); | |
861 | ei_local->stat.rx_crc_errors += ei_inb_p(ioaddr + EN0_COUNTER1); | |
862 | ei_local->stat.rx_missed_errors+= ei_inb_p(ioaddr + EN0_COUNTER2); | |
863 | spin_unlock_irqrestore(&ei_local->page_lock, flags); | |
864 | ||
865 | return &ei_local->stat; | |
866 | } | |
867 | ||
868 | /* | |
869 | * Form the 64 bit 8390 multicast table from the linked list of addresses | |
870 | * associated with this dev structure. | |
871 | */ | |
872 | ||
873 | static inline void make_mc_bits(u8 *bits, struct net_device *dev) | |
874 | { | |
875 | struct dev_mc_list *dmi; | |
876 | ||
877 | for (dmi=dev->mc_list; dmi; dmi=dmi->next) | |
878 | { | |
879 | u32 crc; | |
880 | if (dmi->dmi_addrlen != ETH_ALEN) | |
881 | { | |
882 | printk(KERN_INFO "%s: invalid multicast address length given.\n", dev->name); | |
883 | continue; | |
884 | } | |
885 | crc = ether_crc(ETH_ALEN, dmi->dmi_addr); | |
886 | /* | |
887 | * The 8390 uses the 6 most significant bits of the | |
888 | * CRC to index the multicast table. | |
889 | */ | |
890 | bits[crc>>29] |= (1<<((crc>>26)&7)); | |
891 | } | |
892 | } | |
893 | ||
894 | /** | |
895 | * do_set_multicast_list - set/clear multicast filter | |
896 | * @dev: net device for which multicast filter is adjusted | |
897 | * | |
898 | * Set or clear the multicast filter for this adaptor. May be called | |
899 | * from a BH in 2.1.x. Must be called with lock held. | |
900 | */ | |
901 | ||
902 | static void do_set_multicast_list(struct net_device *dev) | |
903 | { | |
904 | unsigned long e8390_base = dev->base_addr; | |
905 | int i; | |
906 | struct ei_device *ei_local = (struct ei_device*)netdev_priv(dev); | |
907 | ||
908 | if (!(dev->flags&(IFF_PROMISC|IFF_ALLMULTI))) | |
909 | { | |
910 | memset(ei_local->mcfilter, 0, 8); | |
911 | if (dev->mc_list) | |
912 | make_mc_bits(ei_local->mcfilter, dev); | |
913 | } | |
914 | else | |
915 | memset(ei_local->mcfilter, 0xFF, 8); /* mcast set to accept-all */ | |
916 | ||
917 | /* | |
918 | * DP8390 manuals don't specify any magic sequence for altering | |
919 | * the multicast regs on an already running card. To be safe, we | |
920 | * ensure multicast mode is off prior to loading up the new hash | |
921 | * table. If this proves to be not enough, we can always resort | |
922 | * to stopping the NIC, loading the table and then restarting. | |
923 | * | |
924 | * Bug Alert! The MC regs on the SMC 83C690 (SMC Elite and SMC | |
925 | * Elite16) appear to be write-only. The NS 8390 data sheet lists | |
926 | * them as r/w so this is a bug. The SMC 83C790 (SMC Ultra and | |
927 | * Ultra32 EISA) appears to have this bug fixed. | |
928 | */ | |
929 | ||
930 | if (netif_running(dev)) | |
931 | ei_outb_p(E8390_RXCONFIG, e8390_base + EN0_RXCR); | |
932 | ei_outb_p(E8390_NODMA + E8390_PAGE1, e8390_base + E8390_CMD); | |
933 | for(i = 0; i < 8; i++) | |
934 | { | |
935 | ei_outb_p(ei_local->mcfilter[i], e8390_base + EN1_MULT_SHIFT(i)); | |
936 | #ifndef BUG_83C690 | |
937 | if(ei_inb_p(e8390_base + EN1_MULT_SHIFT(i))!=ei_local->mcfilter[i]) | |
938 | printk(KERN_ERR "Multicast filter read/write mismap %d\n",i); | |
939 | #endif | |
940 | } | |
941 | ei_outb_p(E8390_NODMA + E8390_PAGE0, e8390_base + E8390_CMD); | |
942 | ||
943 | if(dev->flags&IFF_PROMISC) | |
944 | ei_outb_p(E8390_RXCONFIG | 0x18, e8390_base + EN0_RXCR); | |
945 | else if(dev->flags&IFF_ALLMULTI || dev->mc_list) | |
946 | ei_outb_p(E8390_RXCONFIG | 0x08, e8390_base + EN0_RXCR); | |
947 | else | |
948 | ei_outb_p(E8390_RXCONFIG, e8390_base + EN0_RXCR); | |
949 | } | |
950 | ||
951 | /* | |
952 | * Called without lock held. This is invoked from user context and may | |
953 | * be parallel to just about everything else. Its also fairly quick and | |
954 | * not called too often. Must protect against both bh and irq users | |
955 | */ | |
956 | ||
957 | static void set_multicast_list(struct net_device *dev) | |
958 | { | |
959 | unsigned long flags; | |
960 | struct ei_device *ei_local = (struct ei_device*)netdev_priv(dev); | |
961 | ||
962 | spin_lock_irqsave(&ei_local->page_lock, flags); | |
963 | do_set_multicast_list(dev); | |
964 | spin_unlock_irqrestore(&ei_local->page_lock, flags); | |
965 | } | |
966 | ||
967 | /** | |
968 | * ethdev_setup - init rest of 8390 device struct | |
969 | * @dev: network device structure to init | |
970 | * | |
971 | * Initialize the rest of the 8390 device structure. Do NOT __init | |
972 | * this, as it is used by 8390 based modular drivers too. | |
973 | */ | |
974 | ||
975 | static void ethdev_setup(struct net_device *dev) | |
976 | { | |
977 | struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev); | |
978 | if (ei_debug > 1) | |
979 | printk(version); | |
980 | ||
981 | dev->hard_start_xmit = &ei_start_xmit; | |
982 | dev->get_stats = get_stats; | |
983 | dev->set_multicast_list = &set_multicast_list; | |
984 | ||
985 | ether_setup(dev); | |
986 | ||
987 | spin_lock_init(&ei_local->page_lock); | |
988 | } | |
989 | ||
990 | /** | |
991 | * alloc_ei_netdev - alloc_etherdev counterpart for 8390 | |
992 | * @size: extra bytes to allocate | |
993 | * | |
994 | * Allocate 8390-specific net_device. | |
995 | */ | |
996 | static struct net_device *____alloc_ei_netdev(int size) | |
997 | { | |
998 | return alloc_netdev(sizeof(struct ei_device) + size, "eth%d", | |
999 | ethdev_setup); | |
1000 | } | |
1001 | ||
1002 | ||
1003 | ||
1004 | ||
1005 | /* This page of functions should be 8390 generic */ | |
1006 | /* Follow National Semi's recommendations for initializing the "NIC". */ | |
1007 | ||
1008 | /** | |
1009 | * NS8390_init - initialize 8390 hardware | |
1010 | * @dev: network device to initialize | |
1011 | * @startp: boolean. non-zero value to initiate chip processing | |
1012 | * | |
1013 | * Must be called with lock held. | |
1014 | */ | |
1015 | ||
1016 | static void __NS8390_init(struct net_device *dev, int startp) | |
1017 | { | |
1018 | unsigned long e8390_base = dev->base_addr; | |
1019 | struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev); | |
1020 | int i; | |
1021 | int endcfg = ei_local->word16 | |
1022 | ? (0x48 | ENDCFG_WTS | (ei_local->bigendian ? ENDCFG_BOS : 0)) | |
1023 | : 0x48; | |
1024 | ||
1025 | if(sizeof(struct e8390_pkt_hdr)!=4) | |
1026 | panic("8390.c: header struct mispacked\n"); | |
1027 | /* Follow National Semi's recommendations for initing the DP83902. */ | |
1028 | ei_outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base+E8390_CMD); /* 0x21 */ | |
1029 | ei_outb_p(endcfg, e8390_base + EN0_DCFG); /* 0x48 or 0x49 */ | |
1030 | /* Clear the remote byte count registers. */ | |
1031 | ei_outb_p(0x00, e8390_base + EN0_RCNTLO); | |
1032 | ei_outb_p(0x00, e8390_base + EN0_RCNTHI); | |
1033 | /* Set to monitor and loopback mode -- this is vital!. */ | |
1034 | ei_outb_p(E8390_RXOFF, e8390_base + EN0_RXCR); /* 0x20 */ | |
1035 | ei_outb_p(E8390_TXOFF, e8390_base + EN0_TXCR); /* 0x02 */ | |
1036 | /* Set the transmit page and receive ring. */ | |
1037 | ei_outb_p(ei_local->tx_start_page, e8390_base + EN0_TPSR); | |
1038 | ei_local->tx1 = ei_local->tx2 = 0; | |
1039 | ei_outb_p(ei_local->rx_start_page, e8390_base + EN0_STARTPG); | |
1040 | ei_outb_p(ei_local->stop_page-1, e8390_base + EN0_BOUNDARY); /* 3c503 says 0x3f,NS0x26*/ | |
1041 | ei_local->current_page = ei_local->rx_start_page; /* assert boundary+1 */ | |
1042 | ei_outb_p(ei_local->stop_page, e8390_base + EN0_STOPPG); | |
1043 | /* Clear the pending interrupts and mask. */ | |
1044 | ei_outb_p(0xFF, e8390_base + EN0_ISR); | |
1045 | ei_outb_p(0x00, e8390_base + EN0_IMR); | |
1046 | ||
1047 | /* Copy the station address into the DS8390 registers. */ | |
1048 | ||
1049 | ei_outb_p(E8390_NODMA + E8390_PAGE1 + E8390_STOP, e8390_base+E8390_CMD); /* 0x61 */ | |
1050 | for(i = 0; i < 6; i++) | |
1051 | { | |
1052 | ei_outb_p(dev->dev_addr[i], e8390_base + EN1_PHYS_SHIFT(i)); | |
1053 | if (ei_debug > 1 && ei_inb_p(e8390_base + EN1_PHYS_SHIFT(i))!=dev->dev_addr[i]) | |
1054 | printk(KERN_ERR "Hw. address read/write mismap %d\n",i); | |
1055 | } | |
1056 | ||
1057 | ei_outb_p(ei_local->rx_start_page, e8390_base + EN1_CURPAG); | |
1058 | ei_outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base+E8390_CMD); | |
1059 | ||
1060 | netif_start_queue(dev); | |
1061 | ei_local->tx1 = ei_local->tx2 = 0; | |
1062 | ei_local->txing = 0; | |
1063 | ||
1064 | if (startp) | |
1065 | { | |
1066 | ei_outb_p(0xff, e8390_base + EN0_ISR); | |
1067 | ei_outb_p(ENISR_ALL, e8390_base + EN0_IMR); | |
1068 | ei_outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, e8390_base+E8390_CMD); | |
1069 | ei_outb_p(E8390_TXCONFIG, e8390_base + EN0_TXCR); /* xmit on. */ | |
1070 | /* 3c503 TechMan says rxconfig only after the NIC is started. */ | |
1071 | ei_outb_p(E8390_RXCONFIG, e8390_base + EN0_RXCR); /* rx on, */ | |
1072 | do_set_multicast_list(dev); /* (re)load the mcast table */ | |
1073 | } | |
1074 | } | |
1075 | ||
1076 | /* Trigger a transmit start, assuming the length is valid. | |
1077 | Always called with the page lock held */ | |
1078 | ||
1079 | static void NS8390_trigger_send(struct net_device *dev, unsigned int length, | |
1080 | int start_page) | |
1081 | { | |
1082 | unsigned long e8390_base = dev->base_addr; | |
1083 | struct ei_device *ei_local __attribute((unused)) = (struct ei_device *) netdev_priv(dev); | |
1084 | ||
1085 | ei_outb_p(E8390_NODMA+E8390_PAGE0, e8390_base+E8390_CMD); | |
1086 | ||
1087 | if (ei_inb_p(e8390_base + E8390_CMD) & E8390_TRANS) | |
1088 | { | |
1089 | printk(KERN_WARNING "%s: trigger_send() called with the transmitter busy.\n", | |
1090 | dev->name); | |
1091 | return; | |
1092 | } | |
1093 | ei_outb_p(length & 0xff, e8390_base + EN0_TCNTLO); | |
1094 | ei_outb_p(length >> 8, e8390_base + EN0_TCNTHI); | |
1095 | ei_outb_p(start_page, e8390_base + EN0_TPSR); | |
1096 | ei_outb_p(E8390_NODMA+E8390_TRANS+E8390_START, e8390_base+E8390_CMD); | |
1097 | } |