Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * sonic.c | |
3 | * | |
efcce839 FT |
4 | * (C) 2005 Finn Thain |
5 | * | |
6 | * Converted to DMA API, added zero-copy buffer handling, and | |
7 | * (from the mac68k project) introduced dhd's support for 16-bit cards. | |
8 | * | |
1da177e4 LT |
9 | * (C) 1996,1998 by Thomas Bogendoerfer (tsbogend@alpha.franken.de) |
10 | * | |
11 | * This driver is based on work from Andreas Busse, but most of | |
12 | * the code is rewritten. | |
13 | * | |
14 | * (C) 1995 by Andreas Busse (andy@waldorf-gmbh.de) | |
15 | * | |
16 | * Core code included by system sonic drivers | |
efcce839 FT |
17 | * |
18 | * And... partially rewritten again by David Huggins-Daines in order | |
19 | * to cope with screwed up Macintosh NICs that may or may not use | |
20 | * 16-bit DMA. | |
21 | * | |
22 | * (C) 1999 David Huggins-Daines <dhd@debian.org> | |
23 | * | |
1da177e4 LT |
24 | */ |
25 | ||
26 | /* | |
27 | * Sources: Olivetti M700-10 Risc Personal Computer hardware handbook, | |
28 | * National Semiconductors data sheet for the DP83932B Sonic Ethernet | |
29 | * controller, and the files "8390.c" and "skeleton.c" in this directory. | |
efcce839 FT |
30 | * |
31 | * Additional sources: Nat Semi data sheet for the DP83932C and Nat Semi | |
32 | * Application Note AN-746, the files "lance.c" and "ibmlana.c". See also | |
33 | * the NetBSD file "sys/arch/mac68k/dev/if_sn.c". | |
1da177e4 LT |
34 | */ |
35 | ||
36 | ||
37 | ||
38 | /* | |
39 | * Open/initialize the SONIC controller. | |
40 | * | |
41 | * This routine should set everything up anew at each open, even | |
42 | * registers that "should" only need to be set once at boot, so that | |
43 | * there is non-reboot way to recover if something goes wrong. | |
44 | */ | |
45 | static int sonic_open(struct net_device *dev) | |
46 | { | |
efcce839 FT |
47 | struct sonic_local *lp = netdev_priv(dev); |
48 | int i; | |
49 | ||
1da177e4 LT |
50 | if (sonic_debug > 2) |
51 | printk("sonic_open: initializing sonic driver.\n"); | |
52 | ||
53 | /* | |
54 | * We don't need to deal with auto-irq stuff since we | |
55 | * hardwire the sonic interrupt. | |
56 | */ | |
57 | /* | |
58 | * XXX Horrible work around: We install sonic_interrupt as fast interrupt. | |
59 | * This means that during execution of the handler interrupt are disabled | |
60 | * covering another bug otherwise corrupting data. This doesn't mean | |
61 | * this glue works ok under all situations. | |
efcce839 FT |
62 | * |
63 | * Note (dhd): this also appears to prevent lockups on the Macintrash | |
64 | * when more than one Ethernet card is installed (knock on wood) | |
65 | * | |
66 | * Note (fthain): whether the above is still true is anyones guess. Certainly | |
67 | * the buffer handling algorithms will not tolerate re-entrance without some | |
68 | * mutual exclusion added. Anyway, the memcpy has now been eliminated from the | |
69 | * rx code to make this a faster "fast interrupt". | |
1da177e4 | 70 | */ |
efcce839 FT |
71 | if (request_irq(dev->irq, &sonic_interrupt, SONIC_IRQ_FLAG, "sonic", dev)) { |
72 | printk(KERN_ERR "\n%s: unable to get IRQ %d .\n", dev->name, dev->irq); | |
1da177e4 LT |
73 | return -EAGAIN; |
74 | } | |
75 | ||
efcce839 FT |
76 | for (i = 0; i < SONIC_NUM_RRS; i++) { |
77 | struct sk_buff *skb = dev_alloc_skb(SONIC_RBSIZE + 2); | |
78 | if (skb == NULL) { | |
79 | while(i > 0) { /* free any that were allocated successfully */ | |
80 | i--; | |
81 | dev_kfree_skb(lp->rx_skb[i]); | |
82 | lp->rx_skb[i] = NULL; | |
83 | } | |
84 | printk(KERN_ERR "%s: couldn't allocate receive buffers\n", | |
85 | dev->name); | |
86 | return -ENOMEM; | |
87 | } | |
88 | skb->dev = dev; | |
89 | /* align IP header unless DMA requires otherwise */ | |
90 | if (SONIC_BUS_SCALE(lp->dma_bitmode) == 2) | |
91 | skb_reserve(skb, 2); | |
92 | lp->rx_skb[i] = skb; | |
93 | } | |
94 | ||
95 | for (i = 0; i < SONIC_NUM_RRS; i++) { | |
96 | dma_addr_t laddr = dma_map_single(lp->device, skb_put(lp->rx_skb[i], SONIC_RBSIZE), | |
97 | SONIC_RBSIZE, DMA_FROM_DEVICE); | |
98 | if (!laddr) { | |
99 | while(i > 0) { /* free any that were mapped successfully */ | |
100 | i--; | |
101 | dma_unmap_single(lp->device, lp->rx_laddr[i], SONIC_RBSIZE, DMA_FROM_DEVICE); | |
102 | lp->rx_laddr[i] = (dma_addr_t)0; | |
103 | } | |
104 | for (i = 0; i < SONIC_NUM_RRS; i++) { | |
105 | dev_kfree_skb(lp->rx_skb[i]); | |
106 | lp->rx_skb[i] = NULL; | |
107 | } | |
108 | printk(KERN_ERR "%s: couldn't map rx DMA buffers\n", | |
109 | dev->name); | |
110 | return -ENOMEM; | |
111 | } | |
112 | lp->rx_laddr[i] = laddr; | |
113 | } | |
114 | ||
1da177e4 LT |
115 | /* |
116 | * Initialize the SONIC | |
117 | */ | |
118 | sonic_init(dev); | |
119 | ||
120 | netif_start_queue(dev); | |
121 | ||
122 | if (sonic_debug > 2) | |
123 | printk("sonic_open: Initialization done.\n"); | |
124 | ||
125 | return 0; | |
126 | } | |
127 | ||
128 | ||
129 | /* | |
130 | * Close the SONIC device | |
131 | */ | |
132 | static int sonic_close(struct net_device *dev) | |
133 | { | |
efcce839 FT |
134 | struct sonic_local *lp = netdev_priv(dev); |
135 | int i; | |
1da177e4 LT |
136 | |
137 | if (sonic_debug > 2) | |
138 | printk("sonic_close\n"); | |
139 | ||
140 | netif_stop_queue(dev); | |
141 | ||
142 | /* | |
143 | * stop the SONIC, disable interrupts | |
144 | */ | |
1da177e4 | 145 | SONIC_WRITE(SONIC_IMR, 0); |
efcce839 | 146 | SONIC_WRITE(SONIC_ISR, 0x7fff); |
1da177e4 LT |
147 | SONIC_WRITE(SONIC_CMD, SONIC_CR_RST); |
148 | ||
efcce839 FT |
149 | /* unmap and free skbs that haven't been transmitted */ |
150 | for (i = 0; i < SONIC_NUM_TDS; i++) { | |
151 | if(lp->tx_laddr[i]) { | |
152 | dma_unmap_single(lp->device, lp->tx_laddr[i], lp->tx_len[i], DMA_TO_DEVICE); | |
153 | lp->tx_laddr[i] = (dma_addr_t)0; | |
154 | } | |
155 | if(lp->tx_skb[i]) { | |
156 | dev_kfree_skb(lp->tx_skb[i]); | |
157 | lp->tx_skb[i] = NULL; | |
158 | } | |
159 | } | |
160 | ||
161 | /* unmap and free the receive buffers */ | |
162 | for (i = 0; i < SONIC_NUM_RRS; i++) { | |
163 | if(lp->rx_laddr[i]) { | |
164 | dma_unmap_single(lp->device, lp->rx_laddr[i], SONIC_RBSIZE, DMA_FROM_DEVICE); | |
165 | lp->rx_laddr[i] = (dma_addr_t)0; | |
166 | } | |
167 | if(lp->rx_skb[i]) { | |
168 | dev_kfree_skb(lp->rx_skb[i]); | |
169 | lp->rx_skb[i] = NULL; | |
170 | } | |
171 | } | |
172 | ||
173 | free_irq(dev->irq, dev); /* release the IRQ */ | |
1da177e4 LT |
174 | |
175 | return 0; | |
176 | } | |
177 | ||
178 | static void sonic_tx_timeout(struct net_device *dev) | |
179 | { | |
efcce839 FT |
180 | struct sonic_local *lp = netdev_priv(dev); |
181 | int i; | |
182 | /* Stop the interrupts for this */ | |
183 | SONIC_WRITE(SONIC_IMR, 0); | |
184 | /* We could resend the original skbs. Easier to re-initialise. */ | |
185 | for (i = 0; i < SONIC_NUM_TDS; i++) { | |
186 | if(lp->tx_laddr[i]) { | |
187 | dma_unmap_single(lp->device, lp->tx_laddr[i], lp->tx_len[i], DMA_TO_DEVICE); | |
188 | lp->tx_laddr[i] = (dma_addr_t)0; | |
189 | } | |
190 | if(lp->tx_skb[i]) { | |
191 | dev_kfree_skb(lp->tx_skb[i]); | |
192 | lp->tx_skb[i] = NULL; | |
193 | } | |
194 | } | |
1da177e4 LT |
195 | /* Try to restart the adaptor. */ |
196 | sonic_init(dev); | |
197 | lp->stats.tx_errors++; | |
198 | dev->trans_start = jiffies; | |
199 | netif_wake_queue(dev); | |
200 | } | |
201 | ||
202 | /* | |
203 | * transmit packet | |
efcce839 FT |
204 | * |
205 | * Appends new TD during transmission thus avoiding any TX interrupts | |
206 | * until we run out of TDs. | |
207 | * This routine interacts closely with the ISR in that it may, | |
208 | * set tx_skb[i] | |
209 | * reset the status flags of the new TD | |
210 | * set and reset EOL flags | |
211 | * stop the tx queue | |
212 | * The ISR interacts with this routine in various ways. It may, | |
213 | * reset tx_skb[i] | |
214 | * test the EOL and status flags of the TDs | |
215 | * wake the tx queue | |
216 | * Concurrently with all of this, the SONIC is potentially writing to | |
217 | * the status flags of the TDs. | |
218 | * Until some mutual exclusion is added, this code will not work with SMP. However, | |
219 | * MIPS Jazz machines and m68k Macs were all uni-processor machines. | |
1da177e4 | 220 | */ |
efcce839 | 221 | |
1da177e4 LT |
222 | static int sonic_send_packet(struct sk_buff *skb, struct net_device *dev) |
223 | { | |
efcce839 FT |
224 | struct sonic_local *lp = netdev_priv(dev); |
225 | dma_addr_t laddr; | |
226 | int length; | |
227 | int entry = lp->next_tx; | |
1da177e4 LT |
228 | |
229 | if (sonic_debug > 2) | |
230 | printk("sonic_send_packet: skb=%p, dev=%p\n", skb, dev); | |
231 | ||
efcce839 FT |
232 | length = skb->len; |
233 | if (length < ETH_ZLEN) { | |
5b057c6b | 234 | if (skb_padto(skb, ETH_ZLEN)) |
efcce839 FT |
235 | return 0; |
236 | length = ETH_ZLEN; | |
237 | } | |
238 | ||
1da177e4 LT |
239 | /* |
240 | * Map the packet data into the logical DMA address space | |
241 | */ | |
efcce839 FT |
242 | |
243 | laddr = dma_map_single(lp->device, skb->data, length, DMA_TO_DEVICE); | |
244 | if (!laddr) { | |
245 | printk(KERN_ERR "%s: failed to map tx DMA buffer.\n", dev->name); | |
1da177e4 | 246 | dev_kfree_skb(skb); |
1da177e4 LT |
247 | return 1; |
248 | } | |
efcce839 FT |
249 | |
250 | sonic_tda_put(dev, entry, SONIC_TD_STATUS, 0); /* clear status */ | |
251 | sonic_tda_put(dev, entry, SONIC_TD_FRAG_COUNT, 1); /* single fragment */ | |
252 | sonic_tda_put(dev, entry, SONIC_TD_PKTSIZE, length); /* length of packet */ | |
253 | sonic_tda_put(dev, entry, SONIC_TD_FRAG_PTR_L, laddr & 0xffff); | |
254 | sonic_tda_put(dev, entry, SONIC_TD_FRAG_PTR_H, laddr >> 16); | |
255 | sonic_tda_put(dev, entry, SONIC_TD_FRAG_SIZE, length); | |
256 | sonic_tda_put(dev, entry, SONIC_TD_LINK, | |
257 | sonic_tda_get(dev, entry, SONIC_TD_LINK) | SONIC_EOL); | |
258 | ||
259 | /* | |
260 | * Must set tx_skb[entry] only after clearing status, and | |
261 | * before clearing EOL and before stopping queue | |
262 | */ | |
263 | wmb(); | |
264 | lp->tx_len[entry] = length; | |
1da177e4 LT |
265 | lp->tx_laddr[entry] = laddr; |
266 | lp->tx_skb[entry] = skb; | |
267 | ||
efcce839 FT |
268 | wmb(); |
269 | sonic_tda_put(dev, lp->eol_tx, SONIC_TD_LINK, | |
270 | sonic_tda_get(dev, lp->eol_tx, SONIC_TD_LINK) & ~SONIC_EOL); | |
271 | lp->eol_tx = entry; | |
1da177e4 | 272 | |
efcce839 FT |
273 | lp->next_tx = (entry + 1) & SONIC_TDS_MASK; |
274 | if (lp->tx_skb[lp->next_tx] != NULL) { | |
275 | /* The ring is full, the ISR has yet to process the next TD. */ | |
276 | if (sonic_debug > 3) | |
277 | printk("%s: stopping queue\n", dev->name); | |
278 | netif_stop_queue(dev); | |
279 | /* after this packet, wait for ISR to free up some TDAs */ | |
280 | } else netif_start_queue(dev); | |
1da177e4 LT |
281 | |
282 | if (sonic_debug > 2) | |
efcce839 | 283 | printk("sonic_send_packet: issuing Tx command\n"); |
1da177e4 LT |
284 | |
285 | SONIC_WRITE(SONIC_CMD, SONIC_CR_TXP); | |
286 | ||
287 | dev->trans_start = jiffies; | |
288 | ||
1da177e4 LT |
289 | return 0; |
290 | } | |
291 | ||
292 | /* | |
293 | * The typical workload of the driver: | |
294 | * Handle the network interface interrupts. | |
295 | */ | |
296 | static irqreturn_t sonic_interrupt(int irq, void *dev_id, struct pt_regs *regs) | |
297 | { | |
298 | struct net_device *dev = (struct net_device *) dev_id; | |
efcce839 | 299 | struct sonic_local *lp = netdev_priv(dev); |
1da177e4 LT |
300 | int status; |
301 | ||
302 | if (dev == NULL) { | |
efcce839 | 303 | printk(KERN_ERR "sonic_interrupt: irq %d for unknown device.\n", irq); |
1da177e4 LT |
304 | return IRQ_NONE; |
305 | } | |
306 | ||
efcce839 FT |
307 | if (!(status = SONIC_READ(SONIC_ISR) & SONIC_IMR_DEFAULT)) |
308 | return IRQ_NONE; | |
1da177e4 | 309 | |
efcce839 FT |
310 | do { |
311 | if (status & SONIC_INT_PKTRX) { | |
312 | if (sonic_debug > 2) | |
313 | printk("%s: packet rx\n", dev->name); | |
314 | sonic_rx(dev); /* got packet(s) */ | |
315 | SONIC_WRITE(SONIC_ISR, SONIC_INT_PKTRX); /* clear the interrupt */ | |
316 | } | |
1da177e4 | 317 | |
efcce839 FT |
318 | if (status & SONIC_INT_TXDN) { |
319 | int entry = lp->cur_tx; | |
320 | int td_status; | |
321 | int freed_some = 0; | |
1da177e4 | 322 | |
efcce839 FT |
323 | /* At this point, cur_tx is the index of a TD that is one of: |
324 | * unallocated/freed (status set & tx_skb[entry] clear) | |
325 | * allocated and sent (status set & tx_skb[entry] set ) | |
326 | * allocated and not yet sent (status clear & tx_skb[entry] set ) | |
327 | * still being allocated by sonic_send_packet (status clear & tx_skb[entry] clear) | |
328 | */ | |
1da177e4 | 329 | |
efcce839 FT |
330 | if (sonic_debug > 2) |
331 | printk("%s: tx done\n", dev->name); | |
332 | ||
333 | while (lp->tx_skb[entry] != NULL) { | |
334 | if ((td_status = sonic_tda_get(dev, entry, SONIC_TD_STATUS)) == 0) | |
335 | break; | |
336 | ||
337 | if (td_status & 0x0001) { | |
338 | lp->stats.tx_packets++; | |
339 | lp->stats.tx_bytes += sonic_tda_get(dev, entry, SONIC_TD_PKTSIZE); | |
340 | } else { | |
341 | lp->stats.tx_errors++; | |
342 | if (td_status & 0x0642) | |
343 | lp->stats.tx_aborted_errors++; | |
344 | if (td_status & 0x0180) | |
345 | lp->stats.tx_carrier_errors++; | |
346 | if (td_status & 0x0020) | |
347 | lp->stats.tx_window_errors++; | |
348 | if (td_status & 0x0004) | |
349 | lp->stats.tx_fifo_errors++; | |
350 | } | |
351 | ||
352 | /* We must free the original skb */ | |
1da177e4 | 353 | dev_kfree_skb_irq(lp->tx_skb[entry]); |
efcce839 FT |
354 | lp->tx_skb[entry] = NULL; |
355 | /* and unmap DMA buffer */ | |
356 | dma_unmap_single(lp->device, lp->tx_laddr[entry], lp->tx_len[entry], DMA_TO_DEVICE); | |
357 | lp->tx_laddr[entry] = (dma_addr_t)0; | |
358 | freed_some = 1; | |
359 | ||
360 | if (sonic_tda_get(dev, entry, SONIC_TD_LINK) & SONIC_EOL) { | |
361 | entry = (entry + 1) & SONIC_TDS_MASK; | |
362 | break; | |
363 | } | |
364 | entry = (entry + 1) & SONIC_TDS_MASK; | |
1da177e4 | 365 | } |
1da177e4 | 366 | |
efcce839 FT |
367 | if (freed_some || lp->tx_skb[entry] == NULL) |
368 | netif_wake_queue(dev); /* The ring is no longer full */ | |
369 | lp->cur_tx = entry; | |
370 | SONIC_WRITE(SONIC_ISR, SONIC_INT_TXDN); /* clear the interrupt */ | |
1da177e4 LT |
371 | } |
372 | ||
efcce839 FT |
373 | /* |
374 | * check error conditions | |
375 | */ | |
376 | if (status & SONIC_INT_RFO) { | |
377 | if (sonic_debug > 1) | |
378 | printk("%s: rx fifo overrun\n", dev->name); | |
379 | lp->stats.rx_fifo_errors++; | |
380 | SONIC_WRITE(SONIC_ISR, SONIC_INT_RFO); /* clear the interrupt */ | |
381 | } | |
382 | if (status & SONIC_INT_RDE) { | |
383 | if (sonic_debug > 1) | |
384 | printk("%s: rx descriptors exhausted\n", dev->name); | |
385 | lp->stats.rx_dropped++; | |
386 | SONIC_WRITE(SONIC_ISR, SONIC_INT_RDE); /* clear the interrupt */ | |
387 | } | |
388 | if (status & SONIC_INT_RBAE) { | |
389 | if (sonic_debug > 1) | |
390 | printk("%s: rx buffer area exceeded\n", dev->name); | |
391 | lp->stats.rx_dropped++; | |
392 | SONIC_WRITE(SONIC_ISR, SONIC_INT_RBAE); /* clear the interrupt */ | |
393 | } | |
1da177e4 | 394 | |
efcce839 FT |
395 | /* counter overruns; all counters are 16bit wide */ |
396 | if (status & SONIC_INT_FAE) { | |
397 | lp->stats.rx_frame_errors += 65536; | |
398 | SONIC_WRITE(SONIC_ISR, SONIC_INT_FAE); /* clear the interrupt */ | |
399 | } | |
400 | if (status & SONIC_INT_CRC) { | |
401 | lp->stats.rx_crc_errors += 65536; | |
402 | SONIC_WRITE(SONIC_ISR, SONIC_INT_CRC); /* clear the interrupt */ | |
403 | } | |
404 | if (status & SONIC_INT_MP) { | |
405 | lp->stats.rx_missed_errors += 65536; | |
406 | SONIC_WRITE(SONIC_ISR, SONIC_INT_MP); /* clear the interrupt */ | |
407 | } | |
1da177e4 | 408 | |
efcce839 FT |
409 | /* transmit error */ |
410 | if (status & SONIC_INT_TXER) { | |
411 | if ((SONIC_READ(SONIC_TCR) & SONIC_TCR_FU) && (sonic_debug > 2)) | |
412 | printk(KERN_ERR "%s: tx fifo underrun\n", dev->name); | |
413 | SONIC_WRITE(SONIC_ISR, SONIC_INT_TXER); /* clear the interrupt */ | |
414 | } | |
1da177e4 | 415 | |
efcce839 FT |
416 | /* bus retry */ |
417 | if (status & SONIC_INT_BR) { | |
418 | printk(KERN_ERR "%s: Bus retry occurred! Device interrupt disabled.\n", | |
419 | dev->name); | |
420 | /* ... to help debug DMA problems causing endless interrupts. */ | |
421 | /* Bounce the eth interface to turn on the interrupt again. */ | |
422 | SONIC_WRITE(SONIC_IMR, 0); | |
423 | SONIC_WRITE(SONIC_ISR, SONIC_INT_BR); /* clear the interrupt */ | |
424 | } | |
1da177e4 | 425 | |
efcce839 FT |
426 | /* load CAM done */ |
427 | if (status & SONIC_INT_LCD) | |
428 | SONIC_WRITE(SONIC_ISR, SONIC_INT_LCD); /* clear the interrupt */ | |
429 | } while((status = SONIC_READ(SONIC_ISR) & SONIC_IMR_DEFAULT)); | |
1da177e4 LT |
430 | return IRQ_HANDLED; |
431 | } | |
432 | ||
433 | /* | |
efcce839 | 434 | * We have a good packet(s), pass it/them up the network stack. |
1da177e4 LT |
435 | */ |
436 | static void sonic_rx(struct net_device *dev) | |
437 | { | |
efcce839 | 438 | struct sonic_local *lp = netdev_priv(dev); |
1da177e4 | 439 | int status; |
efcce839 FT |
440 | int entry = lp->cur_rx; |
441 | ||
442 | while (sonic_rda_get(dev, entry, SONIC_RD_IN_USE) == 0) { | |
443 | struct sk_buff *used_skb; | |
444 | struct sk_buff *new_skb; | |
445 | dma_addr_t new_laddr; | |
446 | u16 bufadr_l; | |
447 | u16 bufadr_h; | |
1da177e4 | 448 | int pkt_len; |
1da177e4 | 449 | |
efcce839 | 450 | status = sonic_rda_get(dev, entry, SONIC_RD_STATUS); |
1da177e4 | 451 | if (status & SONIC_RCR_PRX) { |
1da177e4 | 452 | /* Malloc up new buffer. */ |
efcce839 FT |
453 | new_skb = dev_alloc_skb(SONIC_RBSIZE + 2); |
454 | if (new_skb == NULL) { | |
455 | printk(KERN_ERR "%s: Memory squeeze, dropping packet.\n", dev->name); | |
456 | lp->stats.rx_dropped++; | |
457 | break; | |
458 | } | |
459 | new_skb->dev = dev; | |
460 | /* provide 16 byte IP header alignment unless DMA requires otherwise */ | |
461 | if(SONIC_BUS_SCALE(lp->dma_bitmode) == 2) | |
462 | skb_reserve(new_skb, 2); | |
463 | ||
464 | new_laddr = dma_map_single(lp->device, skb_put(new_skb, SONIC_RBSIZE), | |
465 | SONIC_RBSIZE, DMA_FROM_DEVICE); | |
466 | if (!new_laddr) { | |
467 | dev_kfree_skb(new_skb); | |
468 | printk(KERN_ERR "%s: Failed to map rx buffer, dropping packet.\n", dev->name); | |
1da177e4 LT |
469 | lp->stats.rx_dropped++; |
470 | break; | |
471 | } | |
efcce839 FT |
472 | |
473 | /* now we have a new skb to replace it, pass the used one up the stack */ | |
474 | dma_unmap_single(lp->device, lp->rx_laddr[entry], SONIC_RBSIZE, DMA_FROM_DEVICE); | |
475 | used_skb = lp->rx_skb[entry]; | |
476 | pkt_len = sonic_rda_get(dev, entry, SONIC_RD_PKTLEN); | |
477 | skb_trim(used_skb, pkt_len); | |
478 | used_skb->protocol = eth_type_trans(used_skb, dev); | |
479 | netif_rx(used_skb); | |
1da177e4 LT |
480 | dev->last_rx = jiffies; |
481 | lp->stats.rx_packets++; | |
482 | lp->stats.rx_bytes += pkt_len; | |
483 | ||
efcce839 FT |
484 | /* and insert the new skb */ |
485 | lp->rx_laddr[entry] = new_laddr; | |
486 | lp->rx_skb[entry] = new_skb; | |
487 | ||
488 | bufadr_l = (unsigned long)new_laddr & 0xffff; | |
489 | bufadr_h = (unsigned long)new_laddr >> 16; | |
490 | sonic_rra_put(dev, entry, SONIC_RR_BUFADR_L, bufadr_l); | |
491 | sonic_rra_put(dev, entry, SONIC_RR_BUFADR_H, bufadr_h); | |
1da177e4 LT |
492 | } else { |
493 | /* This should only happen, if we enable accepting broken packets. */ | |
494 | lp->stats.rx_errors++; | |
495 | if (status & SONIC_RCR_FAER) | |
496 | lp->stats.rx_frame_errors++; | |
497 | if (status & SONIC_RCR_CRCR) | |
498 | lp->stats.rx_crc_errors++; | |
499 | } | |
1da177e4 LT |
500 | if (status & SONIC_RCR_LPKT) { |
501 | /* | |
efcce839 | 502 | * this was the last packet out of the current receive buffer |
1da177e4 LT |
503 | * give the buffer back to the SONIC |
504 | */ | |
efcce839 FT |
505 | lp->cur_rwp += SIZEOF_SONIC_RR * SONIC_BUS_SCALE(lp->dma_bitmode); |
506 | if (lp->cur_rwp >= lp->rra_end) lp->cur_rwp = lp->rra_laddr & 0xffff; | |
507 | SONIC_WRITE(SONIC_RWP, lp->cur_rwp); | |
508 | if (SONIC_READ(SONIC_ISR) & SONIC_INT_RBE) { | |
509 | if (sonic_debug > 2) | |
510 | printk("%s: rx buffer exhausted\n", dev->name); | |
511 | SONIC_WRITE(SONIC_ISR, SONIC_INT_RBE); /* clear the flag */ | |
512 | } | |
1da177e4 | 513 | } else |
efcce839 | 514 | printk(KERN_ERR "%s: rx desc without RCR_LPKT. Shouldn't happen !?\n", |
1da177e4 | 515 | dev->name); |
efcce839 FT |
516 | /* |
517 | * give back the descriptor | |
518 | */ | |
519 | sonic_rda_put(dev, entry, SONIC_RD_LINK, | |
520 | sonic_rda_get(dev, entry, SONIC_RD_LINK) | SONIC_EOL); | |
521 | sonic_rda_put(dev, entry, SONIC_RD_IN_USE, 1); | |
522 | sonic_rda_put(dev, lp->eol_rx, SONIC_RD_LINK, | |
523 | sonic_rda_get(dev, lp->eol_rx, SONIC_RD_LINK) & ~SONIC_EOL); | |
524 | lp->eol_rx = entry; | |
525 | lp->cur_rx = entry = (entry + 1) & SONIC_RDS_MASK; | |
1da177e4 LT |
526 | } |
527 | /* | |
efcce839 | 528 | * If any worth-while packets have been received, netif_rx() |
1da177e4 LT |
529 | * has done a mark_bh(NET_BH) for us and will work on them |
530 | * when we get to the bottom-half routine. | |
531 | */ | |
532 | } | |
533 | ||
534 | ||
535 | /* | |
536 | * Get the current statistics. | |
537 | * This may be called with the device open or closed. | |
538 | */ | |
539 | static struct net_device_stats *sonic_get_stats(struct net_device *dev) | |
540 | { | |
efcce839 | 541 | struct sonic_local *lp = netdev_priv(dev); |
1da177e4 LT |
542 | |
543 | /* read the tally counter from the SONIC and reset them */ | |
544 | lp->stats.rx_crc_errors += SONIC_READ(SONIC_CRCT); | |
545 | SONIC_WRITE(SONIC_CRCT, 0xffff); | |
546 | lp->stats.rx_frame_errors += SONIC_READ(SONIC_FAET); | |
547 | SONIC_WRITE(SONIC_FAET, 0xffff); | |
548 | lp->stats.rx_missed_errors += SONIC_READ(SONIC_MPT); | |
549 | SONIC_WRITE(SONIC_MPT, 0xffff); | |
550 | ||
551 | return &lp->stats; | |
552 | } | |
553 | ||
554 | ||
555 | /* | |
556 | * Set or clear the multicast filter for this adaptor. | |
557 | */ | |
558 | static void sonic_multicast_list(struct net_device *dev) | |
559 | { | |
efcce839 | 560 | struct sonic_local *lp = netdev_priv(dev); |
1da177e4 LT |
561 | unsigned int rcr; |
562 | struct dev_mc_list *dmi = dev->mc_list; | |
563 | unsigned char *addr; | |
564 | int i; | |
565 | ||
566 | rcr = SONIC_READ(SONIC_RCR) & ~(SONIC_RCR_PRO | SONIC_RCR_AMC); | |
567 | rcr |= SONIC_RCR_BRD; /* accept broadcast packets */ | |
568 | ||
569 | if (dev->flags & IFF_PROMISC) { /* set promiscuous mode */ | |
570 | rcr |= SONIC_RCR_PRO; | |
571 | } else { | |
572 | if ((dev->flags & IFF_ALLMULTI) || (dev->mc_count > 15)) { | |
573 | rcr |= SONIC_RCR_AMC; | |
574 | } else { | |
575 | if (sonic_debug > 2) | |
efcce839 FT |
576 | printk("sonic_multicast_list: mc_count %d\n", dev->mc_count); |
577 | sonic_set_cam_enable(dev, 1); /* always enable our own address */ | |
1da177e4 LT |
578 | for (i = 1; i <= dev->mc_count; i++) { |
579 | addr = dmi->dmi_addr; | |
580 | dmi = dmi->next; | |
efcce839 FT |
581 | sonic_cda_put(dev, i, SONIC_CD_CAP0, addr[1] << 8 | addr[0]); |
582 | sonic_cda_put(dev, i, SONIC_CD_CAP1, addr[3] << 8 | addr[2]); | |
583 | sonic_cda_put(dev, i, SONIC_CD_CAP2, addr[5] << 8 | addr[4]); | |
584 | sonic_set_cam_enable(dev, sonic_get_cam_enable(dev) | (1 << i)); | |
1da177e4 LT |
585 | } |
586 | SONIC_WRITE(SONIC_CDC, 16); | |
587 | /* issue Load CAM command */ | |
588 | SONIC_WRITE(SONIC_CDP, lp->cda_laddr & 0xffff); | |
589 | SONIC_WRITE(SONIC_CMD, SONIC_CR_LCAM); | |
590 | } | |
591 | } | |
592 | ||
593 | if (sonic_debug > 2) | |
594 | printk("sonic_multicast_list: setting RCR=%x\n", rcr); | |
595 | ||
596 | SONIC_WRITE(SONIC_RCR, rcr); | |
597 | } | |
598 | ||
599 | ||
600 | /* | |
601 | * Initialize the SONIC ethernet controller. | |
602 | */ | |
603 | static int sonic_init(struct net_device *dev) | |
604 | { | |
1da177e4 | 605 | unsigned int cmd; |
efcce839 | 606 | struct sonic_local *lp = netdev_priv(dev); |
1da177e4 LT |
607 | int i; |
608 | ||
609 | /* | |
610 | * put the Sonic into software-reset mode and | |
611 | * disable all interrupts | |
612 | */ | |
1da177e4 | 613 | SONIC_WRITE(SONIC_IMR, 0); |
efcce839 | 614 | SONIC_WRITE(SONIC_ISR, 0x7fff); |
1da177e4 LT |
615 | SONIC_WRITE(SONIC_CMD, SONIC_CR_RST); |
616 | ||
617 | /* | |
618 | * clear software reset flag, disable receiver, clear and | |
619 | * enable interrupts, then completely initialize the SONIC | |
620 | */ | |
621 | SONIC_WRITE(SONIC_CMD, 0); | |
622 | SONIC_WRITE(SONIC_CMD, SONIC_CR_RXDIS); | |
623 | ||
624 | /* | |
625 | * initialize the receive resource area | |
626 | */ | |
627 | if (sonic_debug > 2) | |
628 | printk("sonic_init: initialize receive resource area\n"); | |
629 | ||
1da177e4 | 630 | for (i = 0; i < SONIC_NUM_RRS; i++) { |
efcce839 FT |
631 | u16 bufadr_l = (unsigned long)lp->rx_laddr[i] & 0xffff; |
632 | u16 bufadr_h = (unsigned long)lp->rx_laddr[i] >> 16; | |
633 | sonic_rra_put(dev, i, SONIC_RR_BUFADR_L, bufadr_l); | |
634 | sonic_rra_put(dev, i, SONIC_RR_BUFADR_H, bufadr_h); | |
635 | sonic_rra_put(dev, i, SONIC_RR_BUFSIZE_L, SONIC_RBSIZE >> 1); | |
636 | sonic_rra_put(dev, i, SONIC_RR_BUFSIZE_H, 0); | |
1da177e4 LT |
637 | } |
638 | ||
639 | /* initialize all RRA registers */ | |
efcce839 FT |
640 | lp->rra_end = (lp->rra_laddr + SONIC_NUM_RRS * SIZEOF_SONIC_RR * |
641 | SONIC_BUS_SCALE(lp->dma_bitmode)) & 0xffff; | |
642 | lp->cur_rwp = (lp->rra_laddr + (SONIC_NUM_RRS - 1) * SIZEOF_SONIC_RR * | |
643 | SONIC_BUS_SCALE(lp->dma_bitmode)) & 0xffff; | |
644 | ||
645 | SONIC_WRITE(SONIC_RSA, lp->rra_laddr & 0xffff); | |
646 | SONIC_WRITE(SONIC_REA, lp->rra_end); | |
647 | SONIC_WRITE(SONIC_RRP, lp->rra_laddr & 0xffff); | |
648 | SONIC_WRITE(SONIC_RWP, lp->cur_rwp); | |
1da177e4 | 649 | SONIC_WRITE(SONIC_URRA, lp->rra_laddr >> 16); |
efcce839 | 650 | SONIC_WRITE(SONIC_EOBC, (SONIC_RBSIZE >> 1) - (lp->dma_bitmode ? 2 : 1)); |
1da177e4 LT |
651 | |
652 | /* load the resource pointers */ | |
653 | if (sonic_debug > 3) | |
efcce839 FT |
654 | printk("sonic_init: issuing RRRA command\n"); |
655 | ||
1da177e4 LT |
656 | SONIC_WRITE(SONIC_CMD, SONIC_CR_RRRA); |
657 | i = 0; | |
658 | while (i++ < 100) { | |
659 | if (SONIC_READ(SONIC_CMD) & SONIC_CR_RRRA) | |
660 | break; | |
661 | } | |
662 | ||
663 | if (sonic_debug > 2) | |
efcce839 FT |
664 | printk("sonic_init: status=%x i=%d\n", SONIC_READ(SONIC_CMD), i); |
665 | ||
1da177e4 LT |
666 | /* |
667 | * Initialize the receive descriptors so that they | |
668 | * become a circular linked list, ie. let the last | |
669 | * descriptor point to the first again. | |
670 | */ | |
671 | if (sonic_debug > 2) | |
efcce839 FT |
672 | printk("sonic_init: initialize receive descriptors\n"); |
673 | for (i=0; i<SONIC_NUM_RDS; i++) { | |
674 | sonic_rda_put(dev, i, SONIC_RD_STATUS, 0); | |
675 | sonic_rda_put(dev, i, SONIC_RD_PKTLEN, 0); | |
676 | sonic_rda_put(dev, i, SONIC_RD_PKTPTR_L, 0); | |
677 | sonic_rda_put(dev, i, SONIC_RD_PKTPTR_H, 0); | |
678 | sonic_rda_put(dev, i, SONIC_RD_SEQNO, 0); | |
679 | sonic_rda_put(dev, i, SONIC_RD_IN_USE, 1); | |
680 | sonic_rda_put(dev, i, SONIC_RD_LINK, | |
681 | lp->rda_laddr + | |
682 | ((i+1) * SIZEOF_SONIC_RD * SONIC_BUS_SCALE(lp->dma_bitmode))); | |
1da177e4 LT |
683 | } |
684 | /* fix last descriptor */ | |
efcce839 FT |
685 | sonic_rda_put(dev, SONIC_NUM_RDS - 1, SONIC_RD_LINK, |
686 | (lp->rda_laddr & 0xffff) | SONIC_EOL); | |
687 | lp->eol_rx = SONIC_NUM_RDS - 1; | |
1da177e4 LT |
688 | lp->cur_rx = 0; |
689 | SONIC_WRITE(SONIC_URDA, lp->rda_laddr >> 16); | |
690 | SONIC_WRITE(SONIC_CRDA, lp->rda_laddr & 0xffff); | |
691 | ||
692 | /* | |
693 | * initialize transmit descriptors | |
694 | */ | |
695 | if (sonic_debug > 2) | |
696 | printk("sonic_init: initialize transmit descriptors\n"); | |
697 | for (i = 0; i < SONIC_NUM_TDS; i++) { | |
efcce839 FT |
698 | sonic_tda_put(dev, i, SONIC_TD_STATUS, 0); |
699 | sonic_tda_put(dev, i, SONIC_TD_CONFIG, 0); | |
700 | sonic_tda_put(dev, i, SONIC_TD_PKTSIZE, 0); | |
701 | sonic_tda_put(dev, i, SONIC_TD_FRAG_COUNT, 0); | |
702 | sonic_tda_put(dev, i, SONIC_TD_LINK, | |
703 | (lp->tda_laddr & 0xffff) + | |
704 | (i + 1) * SIZEOF_SONIC_TD * SONIC_BUS_SCALE(lp->dma_bitmode)); | |
705 | lp->tx_skb[i] = NULL; | |
1da177e4 | 706 | } |
efcce839 FT |
707 | /* fix last descriptor */ |
708 | sonic_tda_put(dev, SONIC_NUM_TDS - 1, SONIC_TD_LINK, | |
709 | (lp->tda_laddr & 0xffff)); | |
1da177e4 LT |
710 | |
711 | SONIC_WRITE(SONIC_UTDA, lp->tda_laddr >> 16); | |
712 | SONIC_WRITE(SONIC_CTDA, lp->tda_laddr & 0xffff); | |
efcce839 FT |
713 | lp->cur_tx = lp->next_tx = 0; |
714 | lp->eol_tx = SONIC_NUM_TDS - 1; | |
715 | ||
1da177e4 LT |
716 | /* |
717 | * put our own address to CAM desc[0] | |
718 | */ | |
efcce839 FT |
719 | sonic_cda_put(dev, 0, SONIC_CD_CAP0, dev->dev_addr[1] << 8 | dev->dev_addr[0]); |
720 | sonic_cda_put(dev, 0, SONIC_CD_CAP1, dev->dev_addr[3] << 8 | dev->dev_addr[2]); | |
721 | sonic_cda_put(dev, 0, SONIC_CD_CAP2, dev->dev_addr[5] << 8 | dev->dev_addr[4]); | |
722 | sonic_set_cam_enable(dev, 1); | |
1da177e4 LT |
723 | |
724 | for (i = 0; i < 16; i++) | |
efcce839 | 725 | sonic_cda_put(dev, i, SONIC_CD_ENTRY_POINTER, i); |
1da177e4 LT |
726 | |
727 | /* | |
728 | * initialize CAM registers | |
729 | */ | |
730 | SONIC_WRITE(SONIC_CDP, lp->cda_laddr & 0xffff); | |
731 | SONIC_WRITE(SONIC_CDC, 16); | |
732 | ||
733 | /* | |
734 | * load the CAM | |
735 | */ | |
736 | SONIC_WRITE(SONIC_CMD, SONIC_CR_LCAM); | |
737 | ||
738 | i = 0; | |
739 | while (i++ < 100) { | |
740 | if (SONIC_READ(SONIC_ISR) & SONIC_INT_LCD) | |
741 | break; | |
742 | } | |
743 | if (sonic_debug > 2) { | |
efcce839 FT |
744 | printk("sonic_init: CMD=%x, ISR=%x\n, i=%d", |
745 | SONIC_READ(SONIC_CMD), SONIC_READ(SONIC_ISR), i); | |
1da177e4 LT |
746 | } |
747 | ||
748 | /* | |
749 | * enable receiver, disable loopback | |
750 | * and enable all interrupts | |
751 | */ | |
752 | SONIC_WRITE(SONIC_CMD, SONIC_CR_RXEN | SONIC_CR_STP); | |
753 | SONIC_WRITE(SONIC_RCR, SONIC_RCR_DEFAULT); | |
754 | SONIC_WRITE(SONIC_TCR, SONIC_TCR_DEFAULT); | |
755 | SONIC_WRITE(SONIC_ISR, 0x7fff); | |
756 | SONIC_WRITE(SONIC_IMR, SONIC_IMR_DEFAULT); | |
757 | ||
758 | cmd = SONIC_READ(SONIC_CMD); | |
759 | if ((cmd & SONIC_CR_RXEN) == 0 || (cmd & SONIC_CR_STP) == 0) | |
efcce839 | 760 | printk(KERN_ERR "sonic_init: failed, status=%x\n", cmd); |
1da177e4 LT |
761 | |
762 | if (sonic_debug > 2) | |
763 | printk("sonic_init: new status=%x\n", | |
764 | SONIC_READ(SONIC_CMD)); | |
765 | ||
766 | return 0; | |
767 | } | |
768 | ||
769 | MODULE_LICENSE("GPL"); |