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