Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * sonic.c |
| 3 | * |
Finn Thain | efcce83 | 2005-08-20 15:53:22 +1000 | [diff] [blame] | 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 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 9 | * (C) 1996,1998 by Thomas Bogendoerfer (tsbogend@alpha.franken.de) |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 10 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 11 | * This driver is based on work from Andreas Busse, but most of |
| 12 | * the code is rewritten. |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 13 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 14 | * (C) 1995 by Andreas Busse (andy@waldorf-gmbh.de) |
| 15 | * |
| 16 | * Core code included by system sonic drivers |
Finn Thain | efcce83 | 2005-08-20 15:53:22 +1000 | [diff] [blame] | 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 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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. |
Finn Thain | efcce83 | 2005-08-20 15:53:22 +1000 | [diff] [blame] | 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". |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | { |
Finn Thain | efcce83 | 2005-08-20 15:53:22 +1000 | [diff] [blame] | 47 | struct sonic_local *lp = netdev_priv(dev); |
| 48 | int i; |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 49 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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. |
Finn Thain | efcce83 | 2005-08-20 15:53:22 +1000 | [diff] [blame] | 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". |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 70 | */ |
Finn Thain | efcce83 | 2005-08-20 15:53:22 +1000 | [diff] [blame] | 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); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 73 | return -EAGAIN; |
| 74 | } |
| 75 | |
Finn Thain | efcce83 | 2005-08-20 15:53:22 +1000 | [diff] [blame] | 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 | } |
Finn Thain | efcce83 | 2005-08-20 15:53:22 +1000 | [diff] [blame] | 88 | /* align IP header unless DMA requires otherwise */ |
| 89 | if (SONIC_BUS_SCALE(lp->dma_bitmode) == 2) |
| 90 | skb_reserve(skb, 2); |
| 91 | lp->rx_skb[i] = skb; |
| 92 | } |
| 93 | |
| 94 | for (i = 0; i < SONIC_NUM_RRS; i++) { |
| 95 | dma_addr_t laddr = dma_map_single(lp->device, skb_put(lp->rx_skb[i], SONIC_RBSIZE), |
| 96 | SONIC_RBSIZE, DMA_FROM_DEVICE); |
| 97 | if (!laddr) { |
| 98 | while(i > 0) { /* free any that were mapped successfully */ |
| 99 | i--; |
| 100 | dma_unmap_single(lp->device, lp->rx_laddr[i], SONIC_RBSIZE, DMA_FROM_DEVICE); |
| 101 | lp->rx_laddr[i] = (dma_addr_t)0; |
| 102 | } |
| 103 | for (i = 0; i < SONIC_NUM_RRS; i++) { |
| 104 | dev_kfree_skb(lp->rx_skb[i]); |
| 105 | lp->rx_skb[i] = NULL; |
| 106 | } |
| 107 | printk(KERN_ERR "%s: couldn't map rx DMA buffers\n", |
| 108 | dev->name); |
| 109 | return -ENOMEM; |
| 110 | } |
| 111 | lp->rx_laddr[i] = laddr; |
| 112 | } |
| 113 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 114 | /* |
| 115 | * Initialize the SONIC |
| 116 | */ |
| 117 | sonic_init(dev); |
| 118 | |
| 119 | netif_start_queue(dev); |
| 120 | |
| 121 | if (sonic_debug > 2) |
| 122 | printk("sonic_open: Initialization done.\n"); |
| 123 | |
| 124 | return 0; |
| 125 | } |
| 126 | |
| 127 | |
| 128 | /* |
| 129 | * Close the SONIC device |
| 130 | */ |
| 131 | static int sonic_close(struct net_device *dev) |
| 132 | { |
Finn Thain | efcce83 | 2005-08-20 15:53:22 +1000 | [diff] [blame] | 133 | struct sonic_local *lp = netdev_priv(dev); |
| 134 | int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 135 | |
| 136 | if (sonic_debug > 2) |
| 137 | printk("sonic_close\n"); |
| 138 | |
| 139 | netif_stop_queue(dev); |
| 140 | |
| 141 | /* |
| 142 | * stop the SONIC, disable interrupts |
| 143 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 144 | SONIC_WRITE(SONIC_IMR, 0); |
Finn Thain | efcce83 | 2005-08-20 15:53:22 +1000 | [diff] [blame] | 145 | SONIC_WRITE(SONIC_ISR, 0x7fff); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 146 | SONIC_WRITE(SONIC_CMD, SONIC_CR_RST); |
| 147 | |
Finn Thain | efcce83 | 2005-08-20 15:53:22 +1000 | [diff] [blame] | 148 | /* unmap and free skbs that haven't been transmitted */ |
| 149 | for (i = 0; i < SONIC_NUM_TDS; i++) { |
| 150 | if(lp->tx_laddr[i]) { |
| 151 | dma_unmap_single(lp->device, lp->tx_laddr[i], lp->tx_len[i], DMA_TO_DEVICE); |
| 152 | lp->tx_laddr[i] = (dma_addr_t)0; |
| 153 | } |
| 154 | if(lp->tx_skb[i]) { |
| 155 | dev_kfree_skb(lp->tx_skb[i]); |
| 156 | lp->tx_skb[i] = NULL; |
| 157 | } |
| 158 | } |
| 159 | |
| 160 | /* unmap and free the receive buffers */ |
| 161 | for (i = 0; i < SONIC_NUM_RRS; i++) { |
| 162 | if(lp->rx_laddr[i]) { |
| 163 | dma_unmap_single(lp->device, lp->rx_laddr[i], SONIC_RBSIZE, DMA_FROM_DEVICE); |
| 164 | lp->rx_laddr[i] = (dma_addr_t)0; |
| 165 | } |
| 166 | if(lp->rx_skb[i]) { |
| 167 | dev_kfree_skb(lp->rx_skb[i]); |
| 168 | lp->rx_skb[i] = NULL; |
| 169 | } |
| 170 | } |
| 171 | |
| 172 | free_irq(dev->irq, dev); /* release the IRQ */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 173 | |
| 174 | return 0; |
| 175 | } |
| 176 | |
| 177 | static void sonic_tx_timeout(struct net_device *dev) |
| 178 | { |
Finn Thain | efcce83 | 2005-08-20 15:53:22 +1000 | [diff] [blame] | 179 | struct sonic_local *lp = netdev_priv(dev); |
| 180 | int i; |
| 181 | /* Stop the interrupts for this */ |
| 182 | SONIC_WRITE(SONIC_IMR, 0); |
| 183 | /* We could resend the original skbs. Easier to re-initialise. */ |
| 184 | for (i = 0; i < SONIC_NUM_TDS; i++) { |
| 185 | if(lp->tx_laddr[i]) { |
| 186 | dma_unmap_single(lp->device, lp->tx_laddr[i], lp->tx_len[i], DMA_TO_DEVICE); |
| 187 | lp->tx_laddr[i] = (dma_addr_t)0; |
| 188 | } |
| 189 | if(lp->tx_skb[i]) { |
| 190 | dev_kfree_skb(lp->tx_skb[i]); |
| 191 | lp->tx_skb[i] = NULL; |
| 192 | } |
| 193 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 194 | /* Try to restart the adaptor. */ |
| 195 | sonic_init(dev); |
| 196 | lp->stats.tx_errors++; |
| 197 | dev->trans_start = jiffies; |
| 198 | netif_wake_queue(dev); |
| 199 | } |
| 200 | |
| 201 | /* |
| 202 | * transmit packet |
Finn Thain | efcce83 | 2005-08-20 15:53:22 +1000 | [diff] [blame] | 203 | * |
| 204 | * Appends new TD during transmission thus avoiding any TX interrupts |
| 205 | * until we run out of TDs. |
| 206 | * This routine interacts closely with the ISR in that it may, |
| 207 | * set tx_skb[i] |
| 208 | * reset the status flags of the new TD |
| 209 | * set and reset EOL flags |
| 210 | * stop the tx queue |
| 211 | * The ISR interacts with this routine in various ways. It may, |
| 212 | * reset tx_skb[i] |
| 213 | * test the EOL and status flags of the TDs |
| 214 | * wake the tx queue |
| 215 | * Concurrently with all of this, the SONIC is potentially writing to |
| 216 | * the status flags of the TDs. |
| 217 | * Until some mutual exclusion is added, this code will not work with SMP. However, |
| 218 | * MIPS Jazz machines and m68k Macs were all uni-processor machines. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 219 | */ |
Finn Thain | efcce83 | 2005-08-20 15:53:22 +1000 | [diff] [blame] | 220 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 221 | static int sonic_send_packet(struct sk_buff *skb, struct net_device *dev) |
| 222 | { |
Finn Thain | efcce83 | 2005-08-20 15:53:22 +1000 | [diff] [blame] | 223 | struct sonic_local *lp = netdev_priv(dev); |
| 224 | dma_addr_t laddr; |
| 225 | int length; |
| 226 | int entry = lp->next_tx; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 227 | |
| 228 | if (sonic_debug > 2) |
| 229 | printk("sonic_send_packet: skb=%p, dev=%p\n", skb, dev); |
| 230 | |
Finn Thain | efcce83 | 2005-08-20 15:53:22 +1000 | [diff] [blame] | 231 | length = skb->len; |
| 232 | if (length < ETH_ZLEN) { |
Herbert Xu | 5b057c6 | 2006-06-23 02:06:41 -0700 | [diff] [blame] | 233 | if (skb_padto(skb, ETH_ZLEN)) |
Finn Thain | efcce83 | 2005-08-20 15:53:22 +1000 | [diff] [blame] | 234 | return 0; |
| 235 | length = ETH_ZLEN; |
| 236 | } |
| 237 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 238 | /* |
| 239 | * Map the packet data into the logical DMA address space |
| 240 | */ |
Finn Thain | efcce83 | 2005-08-20 15:53:22 +1000 | [diff] [blame] | 241 | |
| 242 | laddr = dma_map_single(lp->device, skb->data, length, DMA_TO_DEVICE); |
| 243 | if (!laddr) { |
| 244 | printk(KERN_ERR "%s: failed to map tx DMA buffer.\n", dev->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 245 | dev_kfree_skb(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 246 | return 1; |
| 247 | } |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 248 | |
Finn Thain | efcce83 | 2005-08-20 15:53:22 +1000 | [diff] [blame] | 249 | sonic_tda_put(dev, entry, SONIC_TD_STATUS, 0); /* clear status */ |
| 250 | sonic_tda_put(dev, entry, SONIC_TD_FRAG_COUNT, 1); /* single fragment */ |
| 251 | sonic_tda_put(dev, entry, SONIC_TD_PKTSIZE, length); /* length of packet */ |
| 252 | sonic_tda_put(dev, entry, SONIC_TD_FRAG_PTR_L, laddr & 0xffff); |
| 253 | sonic_tda_put(dev, entry, SONIC_TD_FRAG_PTR_H, laddr >> 16); |
| 254 | sonic_tda_put(dev, entry, SONIC_TD_FRAG_SIZE, length); |
| 255 | sonic_tda_put(dev, entry, SONIC_TD_LINK, |
| 256 | sonic_tda_get(dev, entry, SONIC_TD_LINK) | SONIC_EOL); |
| 257 | |
| 258 | /* |
| 259 | * Must set tx_skb[entry] only after clearing status, and |
| 260 | * before clearing EOL and before stopping queue |
| 261 | */ |
| 262 | wmb(); |
| 263 | lp->tx_len[entry] = length; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 264 | lp->tx_laddr[entry] = laddr; |
| 265 | lp->tx_skb[entry] = skb; |
| 266 | |
Finn Thain | efcce83 | 2005-08-20 15:53:22 +1000 | [diff] [blame] | 267 | wmb(); |
| 268 | sonic_tda_put(dev, lp->eol_tx, SONIC_TD_LINK, |
| 269 | sonic_tda_get(dev, lp->eol_tx, SONIC_TD_LINK) & ~SONIC_EOL); |
| 270 | lp->eol_tx = entry; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 271 | |
Finn Thain | efcce83 | 2005-08-20 15:53:22 +1000 | [diff] [blame] | 272 | lp->next_tx = (entry + 1) & SONIC_TDS_MASK; |
| 273 | if (lp->tx_skb[lp->next_tx] != NULL) { |
| 274 | /* The ring is full, the ISR has yet to process the next TD. */ |
| 275 | if (sonic_debug > 3) |
| 276 | printk("%s: stopping queue\n", dev->name); |
| 277 | netif_stop_queue(dev); |
| 278 | /* after this packet, wait for ISR to free up some TDAs */ |
| 279 | } else netif_start_queue(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 280 | |
| 281 | if (sonic_debug > 2) |
Finn Thain | efcce83 | 2005-08-20 15:53:22 +1000 | [diff] [blame] | 282 | printk("sonic_send_packet: issuing Tx command\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 283 | |
| 284 | SONIC_WRITE(SONIC_CMD, SONIC_CR_TXP); |
| 285 | |
| 286 | dev->trans_start = jiffies; |
| 287 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 288 | return 0; |
| 289 | } |
| 290 | |
| 291 | /* |
| 292 | * The typical workload of the driver: |
| 293 | * Handle the network interface interrupts. |
| 294 | */ |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 295 | static irqreturn_t sonic_interrupt(int irq, void *dev_id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 296 | { |
Jeff Garzik | c31f28e | 2006-10-06 14:56:04 -0400 | [diff] [blame] | 297 | struct net_device *dev = dev_id; |
Finn Thain | efcce83 | 2005-08-20 15:53:22 +1000 | [diff] [blame] | 298 | struct sonic_local *lp = netdev_priv(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 299 | int status; |
| 300 | |
Finn Thain | efcce83 | 2005-08-20 15:53:22 +1000 | [diff] [blame] | 301 | if (!(status = SONIC_READ(SONIC_ISR) & SONIC_IMR_DEFAULT)) |
| 302 | return IRQ_NONE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 303 | |
Finn Thain | efcce83 | 2005-08-20 15:53:22 +1000 | [diff] [blame] | 304 | do { |
| 305 | if (status & SONIC_INT_PKTRX) { |
| 306 | if (sonic_debug > 2) |
| 307 | printk("%s: packet rx\n", dev->name); |
| 308 | sonic_rx(dev); /* got packet(s) */ |
| 309 | SONIC_WRITE(SONIC_ISR, SONIC_INT_PKTRX); /* clear the interrupt */ |
| 310 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 311 | |
Finn Thain | efcce83 | 2005-08-20 15:53:22 +1000 | [diff] [blame] | 312 | if (status & SONIC_INT_TXDN) { |
| 313 | int entry = lp->cur_tx; |
| 314 | int td_status; |
| 315 | int freed_some = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 316 | |
Finn Thain | efcce83 | 2005-08-20 15:53:22 +1000 | [diff] [blame] | 317 | /* At this point, cur_tx is the index of a TD that is one of: |
| 318 | * unallocated/freed (status set & tx_skb[entry] clear) |
| 319 | * allocated and sent (status set & tx_skb[entry] set ) |
| 320 | * allocated and not yet sent (status clear & tx_skb[entry] set ) |
| 321 | * still being allocated by sonic_send_packet (status clear & tx_skb[entry] clear) |
| 322 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 323 | |
Finn Thain | efcce83 | 2005-08-20 15:53:22 +1000 | [diff] [blame] | 324 | if (sonic_debug > 2) |
| 325 | printk("%s: tx done\n", dev->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 326 | |
Finn Thain | efcce83 | 2005-08-20 15:53:22 +1000 | [diff] [blame] | 327 | while (lp->tx_skb[entry] != NULL) { |
| 328 | if ((td_status = sonic_tda_get(dev, entry, SONIC_TD_STATUS)) == 0) |
| 329 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 330 | |
Finn Thain | efcce83 | 2005-08-20 15:53:22 +1000 | [diff] [blame] | 331 | if (td_status & 0x0001) { |
| 332 | lp->stats.tx_packets++; |
| 333 | lp->stats.tx_bytes += sonic_tda_get(dev, entry, SONIC_TD_PKTSIZE); |
| 334 | } else { |
| 335 | lp->stats.tx_errors++; |
| 336 | if (td_status & 0x0642) |
| 337 | lp->stats.tx_aborted_errors++; |
| 338 | if (td_status & 0x0180) |
| 339 | lp->stats.tx_carrier_errors++; |
| 340 | if (td_status & 0x0020) |
| 341 | lp->stats.tx_window_errors++; |
| 342 | if (td_status & 0x0004) |
| 343 | lp->stats.tx_fifo_errors++; |
| 344 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 345 | |
Finn Thain | efcce83 | 2005-08-20 15:53:22 +1000 | [diff] [blame] | 346 | /* We must free the original skb */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 347 | dev_kfree_skb_irq(lp->tx_skb[entry]); |
Finn Thain | efcce83 | 2005-08-20 15:53:22 +1000 | [diff] [blame] | 348 | lp->tx_skb[entry] = NULL; |
| 349 | /* and unmap DMA buffer */ |
| 350 | dma_unmap_single(lp->device, lp->tx_laddr[entry], lp->tx_len[entry], DMA_TO_DEVICE); |
| 351 | lp->tx_laddr[entry] = (dma_addr_t)0; |
| 352 | freed_some = 1; |
| 353 | |
| 354 | if (sonic_tda_get(dev, entry, SONIC_TD_LINK) & SONIC_EOL) { |
| 355 | entry = (entry + 1) & SONIC_TDS_MASK; |
| 356 | break; |
| 357 | } |
| 358 | entry = (entry + 1) & SONIC_TDS_MASK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 359 | } |
Finn Thain | efcce83 | 2005-08-20 15:53:22 +1000 | [diff] [blame] | 360 | |
| 361 | if (freed_some || lp->tx_skb[entry] == NULL) |
| 362 | netif_wake_queue(dev); /* The ring is no longer full */ |
| 363 | lp->cur_tx = entry; |
| 364 | SONIC_WRITE(SONIC_ISR, SONIC_INT_TXDN); /* clear the interrupt */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 365 | } |
| 366 | |
Finn Thain | efcce83 | 2005-08-20 15:53:22 +1000 | [diff] [blame] | 367 | /* |
| 368 | * check error conditions |
| 369 | */ |
| 370 | if (status & SONIC_INT_RFO) { |
| 371 | if (sonic_debug > 1) |
| 372 | printk("%s: rx fifo overrun\n", dev->name); |
| 373 | lp->stats.rx_fifo_errors++; |
| 374 | SONIC_WRITE(SONIC_ISR, SONIC_INT_RFO); /* clear the interrupt */ |
| 375 | } |
| 376 | if (status & SONIC_INT_RDE) { |
| 377 | if (sonic_debug > 1) |
| 378 | printk("%s: rx descriptors exhausted\n", dev->name); |
| 379 | lp->stats.rx_dropped++; |
| 380 | SONIC_WRITE(SONIC_ISR, SONIC_INT_RDE); /* clear the interrupt */ |
| 381 | } |
| 382 | if (status & SONIC_INT_RBAE) { |
| 383 | if (sonic_debug > 1) |
| 384 | printk("%s: rx buffer area exceeded\n", dev->name); |
| 385 | lp->stats.rx_dropped++; |
| 386 | SONIC_WRITE(SONIC_ISR, SONIC_INT_RBAE); /* clear the interrupt */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 387 | } |
| 388 | |
Finn Thain | efcce83 | 2005-08-20 15:53:22 +1000 | [diff] [blame] | 389 | /* counter overruns; all counters are 16bit wide */ |
| 390 | if (status & SONIC_INT_FAE) { |
| 391 | lp->stats.rx_frame_errors += 65536; |
| 392 | SONIC_WRITE(SONIC_ISR, SONIC_INT_FAE); /* clear the interrupt */ |
| 393 | } |
| 394 | if (status & SONIC_INT_CRC) { |
| 395 | lp->stats.rx_crc_errors += 65536; |
| 396 | SONIC_WRITE(SONIC_ISR, SONIC_INT_CRC); /* clear the interrupt */ |
| 397 | } |
| 398 | if (status & SONIC_INT_MP) { |
| 399 | lp->stats.rx_missed_errors += 65536; |
| 400 | SONIC_WRITE(SONIC_ISR, SONIC_INT_MP); /* clear the interrupt */ |
| 401 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 402 | |
Finn Thain | efcce83 | 2005-08-20 15:53:22 +1000 | [diff] [blame] | 403 | /* transmit error */ |
| 404 | if (status & SONIC_INT_TXER) { |
| 405 | if ((SONIC_READ(SONIC_TCR) & SONIC_TCR_FU) && (sonic_debug > 2)) |
| 406 | printk(KERN_ERR "%s: tx fifo underrun\n", dev->name); |
| 407 | SONIC_WRITE(SONIC_ISR, SONIC_INT_TXER); /* clear the interrupt */ |
| 408 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 409 | |
Finn Thain | efcce83 | 2005-08-20 15:53:22 +1000 | [diff] [blame] | 410 | /* bus retry */ |
| 411 | if (status & SONIC_INT_BR) { |
| 412 | printk(KERN_ERR "%s: Bus retry occurred! Device interrupt disabled.\n", |
| 413 | dev->name); |
| 414 | /* ... to help debug DMA problems causing endless interrupts. */ |
| 415 | /* Bounce the eth interface to turn on the interrupt again. */ |
| 416 | SONIC_WRITE(SONIC_IMR, 0); |
| 417 | SONIC_WRITE(SONIC_ISR, SONIC_INT_BR); /* clear the interrupt */ |
| 418 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 419 | |
Finn Thain | efcce83 | 2005-08-20 15:53:22 +1000 | [diff] [blame] | 420 | /* load CAM done */ |
| 421 | if (status & SONIC_INT_LCD) |
| 422 | SONIC_WRITE(SONIC_ISR, SONIC_INT_LCD); /* clear the interrupt */ |
| 423 | } while((status = SONIC_READ(SONIC_ISR) & SONIC_IMR_DEFAULT)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 424 | return IRQ_HANDLED; |
| 425 | } |
| 426 | |
| 427 | /* |
Finn Thain | efcce83 | 2005-08-20 15:53:22 +1000 | [diff] [blame] | 428 | * We have a good packet(s), pass it/them up the network stack. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 429 | */ |
| 430 | static void sonic_rx(struct net_device *dev) |
| 431 | { |
Finn Thain | efcce83 | 2005-08-20 15:53:22 +1000 | [diff] [blame] | 432 | struct sonic_local *lp = netdev_priv(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 433 | int status; |
Finn Thain | efcce83 | 2005-08-20 15:53:22 +1000 | [diff] [blame] | 434 | int entry = lp->cur_rx; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 435 | |
Finn Thain | efcce83 | 2005-08-20 15:53:22 +1000 | [diff] [blame] | 436 | while (sonic_rda_get(dev, entry, SONIC_RD_IN_USE) == 0) { |
| 437 | struct sk_buff *used_skb; |
| 438 | struct sk_buff *new_skb; |
| 439 | dma_addr_t new_laddr; |
| 440 | u16 bufadr_l; |
| 441 | u16 bufadr_h; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 442 | int pkt_len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 443 | |
Finn Thain | efcce83 | 2005-08-20 15:53:22 +1000 | [diff] [blame] | 444 | status = sonic_rda_get(dev, entry, SONIC_RD_STATUS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 445 | if (status & SONIC_RCR_PRX) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 446 | /* Malloc up new buffer. */ |
Finn Thain | efcce83 | 2005-08-20 15:53:22 +1000 | [diff] [blame] | 447 | new_skb = dev_alloc_skb(SONIC_RBSIZE + 2); |
| 448 | if (new_skb == NULL) { |
| 449 | printk(KERN_ERR "%s: Memory squeeze, dropping packet.\n", dev->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 450 | lp->stats.rx_dropped++; |
| 451 | break; |
| 452 | } |
Finn Thain | efcce83 | 2005-08-20 15:53:22 +1000 | [diff] [blame] | 453 | /* provide 16 byte IP header alignment unless DMA requires otherwise */ |
| 454 | if(SONIC_BUS_SCALE(lp->dma_bitmode) == 2) |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 455 | skb_reserve(new_skb, 2); |
Finn Thain | efcce83 | 2005-08-20 15:53:22 +1000 | [diff] [blame] | 456 | |
| 457 | new_laddr = dma_map_single(lp->device, skb_put(new_skb, SONIC_RBSIZE), |
| 458 | SONIC_RBSIZE, DMA_FROM_DEVICE); |
| 459 | if (!new_laddr) { |
| 460 | dev_kfree_skb(new_skb); |
| 461 | printk(KERN_ERR "%s: Failed to map rx buffer, dropping packet.\n", dev->name); |
| 462 | lp->stats.rx_dropped++; |
| 463 | break; |
| 464 | } |
| 465 | |
| 466 | /* now we have a new skb to replace it, pass the used one up the stack */ |
| 467 | dma_unmap_single(lp->device, lp->rx_laddr[entry], SONIC_RBSIZE, DMA_FROM_DEVICE); |
| 468 | used_skb = lp->rx_skb[entry]; |
| 469 | pkt_len = sonic_rda_get(dev, entry, SONIC_RD_PKTLEN); |
| 470 | skb_trim(used_skb, pkt_len); |
| 471 | used_skb->protocol = eth_type_trans(used_skb, dev); |
| 472 | netif_rx(used_skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 473 | dev->last_rx = jiffies; |
| 474 | lp->stats.rx_packets++; |
| 475 | lp->stats.rx_bytes += pkt_len; |
| 476 | |
Finn Thain | efcce83 | 2005-08-20 15:53:22 +1000 | [diff] [blame] | 477 | /* and insert the new skb */ |
| 478 | lp->rx_laddr[entry] = new_laddr; |
| 479 | lp->rx_skb[entry] = new_skb; |
| 480 | |
| 481 | bufadr_l = (unsigned long)new_laddr & 0xffff; |
| 482 | bufadr_h = (unsigned long)new_laddr >> 16; |
| 483 | sonic_rra_put(dev, entry, SONIC_RR_BUFADR_L, bufadr_l); |
| 484 | sonic_rra_put(dev, entry, SONIC_RR_BUFADR_H, bufadr_h); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 485 | } else { |
| 486 | /* This should only happen, if we enable accepting broken packets. */ |
| 487 | lp->stats.rx_errors++; |
| 488 | if (status & SONIC_RCR_FAER) |
| 489 | lp->stats.rx_frame_errors++; |
| 490 | if (status & SONIC_RCR_CRCR) |
| 491 | lp->stats.rx_crc_errors++; |
| 492 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 493 | if (status & SONIC_RCR_LPKT) { |
| 494 | /* |
Finn Thain | efcce83 | 2005-08-20 15:53:22 +1000 | [diff] [blame] | 495 | * this was the last packet out of the current receive buffer |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 496 | * give the buffer back to the SONIC |
| 497 | */ |
Finn Thain | efcce83 | 2005-08-20 15:53:22 +1000 | [diff] [blame] | 498 | lp->cur_rwp += SIZEOF_SONIC_RR * SONIC_BUS_SCALE(lp->dma_bitmode); |
| 499 | if (lp->cur_rwp >= lp->rra_end) lp->cur_rwp = lp->rra_laddr & 0xffff; |
| 500 | SONIC_WRITE(SONIC_RWP, lp->cur_rwp); |
| 501 | if (SONIC_READ(SONIC_ISR) & SONIC_INT_RBE) { |
| 502 | if (sonic_debug > 2) |
| 503 | printk("%s: rx buffer exhausted\n", dev->name); |
| 504 | SONIC_WRITE(SONIC_ISR, SONIC_INT_RBE); /* clear the flag */ |
| 505 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 506 | } else |
Finn Thain | efcce83 | 2005-08-20 15:53:22 +1000 | [diff] [blame] | 507 | printk(KERN_ERR "%s: rx desc without RCR_LPKT. Shouldn't happen !?\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 508 | dev->name); |
Finn Thain | efcce83 | 2005-08-20 15:53:22 +1000 | [diff] [blame] | 509 | /* |
| 510 | * give back the descriptor |
| 511 | */ |
| 512 | sonic_rda_put(dev, entry, SONIC_RD_LINK, |
| 513 | sonic_rda_get(dev, entry, SONIC_RD_LINK) | SONIC_EOL); |
| 514 | sonic_rda_put(dev, entry, SONIC_RD_IN_USE, 1); |
| 515 | sonic_rda_put(dev, lp->eol_rx, SONIC_RD_LINK, |
| 516 | sonic_rda_get(dev, lp->eol_rx, SONIC_RD_LINK) & ~SONIC_EOL); |
| 517 | lp->eol_rx = entry; |
| 518 | lp->cur_rx = entry = (entry + 1) & SONIC_RDS_MASK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 519 | } |
| 520 | /* |
Finn Thain | efcce83 | 2005-08-20 15:53:22 +1000 | [diff] [blame] | 521 | * If any worth-while packets have been received, netif_rx() |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 522 | * has done a mark_bh(NET_BH) for us and will work on them |
| 523 | * when we get to the bottom-half routine. |
| 524 | */ |
| 525 | } |
| 526 | |
| 527 | |
| 528 | /* |
| 529 | * Get the current statistics. |
| 530 | * This may be called with the device open or closed. |
| 531 | */ |
| 532 | static struct net_device_stats *sonic_get_stats(struct net_device *dev) |
| 533 | { |
Finn Thain | efcce83 | 2005-08-20 15:53:22 +1000 | [diff] [blame] | 534 | struct sonic_local *lp = netdev_priv(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 535 | |
| 536 | /* read the tally counter from the SONIC and reset them */ |
| 537 | lp->stats.rx_crc_errors += SONIC_READ(SONIC_CRCT); |
| 538 | SONIC_WRITE(SONIC_CRCT, 0xffff); |
| 539 | lp->stats.rx_frame_errors += SONIC_READ(SONIC_FAET); |
| 540 | SONIC_WRITE(SONIC_FAET, 0xffff); |
| 541 | lp->stats.rx_missed_errors += SONIC_READ(SONIC_MPT); |
| 542 | SONIC_WRITE(SONIC_MPT, 0xffff); |
| 543 | |
| 544 | return &lp->stats; |
| 545 | } |
| 546 | |
| 547 | |
| 548 | /* |
| 549 | * Set or clear the multicast filter for this adaptor. |
| 550 | */ |
| 551 | static void sonic_multicast_list(struct net_device *dev) |
| 552 | { |
Finn Thain | efcce83 | 2005-08-20 15:53:22 +1000 | [diff] [blame] | 553 | struct sonic_local *lp = netdev_priv(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 554 | unsigned int rcr; |
| 555 | struct dev_mc_list *dmi = dev->mc_list; |
| 556 | unsigned char *addr; |
| 557 | int i; |
| 558 | |
| 559 | rcr = SONIC_READ(SONIC_RCR) & ~(SONIC_RCR_PRO | SONIC_RCR_AMC); |
| 560 | rcr |= SONIC_RCR_BRD; /* accept broadcast packets */ |
| 561 | |
| 562 | if (dev->flags & IFF_PROMISC) { /* set promiscuous mode */ |
| 563 | rcr |= SONIC_RCR_PRO; |
| 564 | } else { |
| 565 | if ((dev->flags & IFF_ALLMULTI) || (dev->mc_count > 15)) { |
| 566 | rcr |= SONIC_RCR_AMC; |
| 567 | } else { |
| 568 | if (sonic_debug > 2) |
Finn Thain | efcce83 | 2005-08-20 15:53:22 +1000 | [diff] [blame] | 569 | printk("sonic_multicast_list: mc_count %d\n", dev->mc_count); |
| 570 | sonic_set_cam_enable(dev, 1); /* always enable our own address */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 571 | for (i = 1; i <= dev->mc_count; i++) { |
| 572 | addr = dmi->dmi_addr; |
| 573 | dmi = dmi->next; |
Finn Thain | efcce83 | 2005-08-20 15:53:22 +1000 | [diff] [blame] | 574 | sonic_cda_put(dev, i, SONIC_CD_CAP0, addr[1] << 8 | addr[0]); |
| 575 | sonic_cda_put(dev, i, SONIC_CD_CAP1, addr[3] << 8 | addr[2]); |
| 576 | sonic_cda_put(dev, i, SONIC_CD_CAP2, addr[5] << 8 | addr[4]); |
| 577 | sonic_set_cam_enable(dev, sonic_get_cam_enable(dev) | (1 << i)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 578 | } |
| 579 | SONIC_WRITE(SONIC_CDC, 16); |
| 580 | /* issue Load CAM command */ |
| 581 | SONIC_WRITE(SONIC_CDP, lp->cda_laddr & 0xffff); |
| 582 | SONIC_WRITE(SONIC_CMD, SONIC_CR_LCAM); |
| 583 | } |
| 584 | } |
| 585 | |
| 586 | if (sonic_debug > 2) |
| 587 | printk("sonic_multicast_list: setting RCR=%x\n", rcr); |
| 588 | |
| 589 | SONIC_WRITE(SONIC_RCR, rcr); |
| 590 | } |
| 591 | |
| 592 | |
| 593 | /* |
| 594 | * Initialize the SONIC ethernet controller. |
| 595 | */ |
| 596 | static int sonic_init(struct net_device *dev) |
| 597 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 598 | unsigned int cmd; |
Finn Thain | efcce83 | 2005-08-20 15:53:22 +1000 | [diff] [blame] | 599 | struct sonic_local *lp = netdev_priv(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 600 | int i; |
| 601 | |
| 602 | /* |
| 603 | * put the Sonic into software-reset mode and |
| 604 | * disable all interrupts |
| 605 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 606 | SONIC_WRITE(SONIC_IMR, 0); |
Finn Thain | efcce83 | 2005-08-20 15:53:22 +1000 | [diff] [blame] | 607 | SONIC_WRITE(SONIC_ISR, 0x7fff); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 608 | SONIC_WRITE(SONIC_CMD, SONIC_CR_RST); |
| 609 | |
| 610 | /* |
| 611 | * clear software reset flag, disable receiver, clear and |
| 612 | * enable interrupts, then completely initialize the SONIC |
| 613 | */ |
| 614 | SONIC_WRITE(SONIC_CMD, 0); |
| 615 | SONIC_WRITE(SONIC_CMD, SONIC_CR_RXDIS); |
| 616 | |
| 617 | /* |
| 618 | * initialize the receive resource area |
| 619 | */ |
| 620 | if (sonic_debug > 2) |
| 621 | printk("sonic_init: initialize receive resource area\n"); |
| 622 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 623 | for (i = 0; i < SONIC_NUM_RRS; i++) { |
Finn Thain | efcce83 | 2005-08-20 15:53:22 +1000 | [diff] [blame] | 624 | u16 bufadr_l = (unsigned long)lp->rx_laddr[i] & 0xffff; |
| 625 | u16 bufadr_h = (unsigned long)lp->rx_laddr[i] >> 16; |
| 626 | sonic_rra_put(dev, i, SONIC_RR_BUFADR_L, bufadr_l); |
| 627 | sonic_rra_put(dev, i, SONIC_RR_BUFADR_H, bufadr_h); |
| 628 | sonic_rra_put(dev, i, SONIC_RR_BUFSIZE_L, SONIC_RBSIZE >> 1); |
| 629 | sonic_rra_put(dev, i, SONIC_RR_BUFSIZE_H, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 630 | } |
| 631 | |
| 632 | /* initialize all RRA registers */ |
Finn Thain | efcce83 | 2005-08-20 15:53:22 +1000 | [diff] [blame] | 633 | lp->rra_end = (lp->rra_laddr + SONIC_NUM_RRS * SIZEOF_SONIC_RR * |
| 634 | SONIC_BUS_SCALE(lp->dma_bitmode)) & 0xffff; |
| 635 | lp->cur_rwp = (lp->rra_laddr + (SONIC_NUM_RRS - 1) * SIZEOF_SONIC_RR * |
| 636 | SONIC_BUS_SCALE(lp->dma_bitmode)) & 0xffff; |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 637 | |
Finn Thain | efcce83 | 2005-08-20 15:53:22 +1000 | [diff] [blame] | 638 | SONIC_WRITE(SONIC_RSA, lp->rra_laddr & 0xffff); |
| 639 | SONIC_WRITE(SONIC_REA, lp->rra_end); |
| 640 | SONIC_WRITE(SONIC_RRP, lp->rra_laddr & 0xffff); |
| 641 | SONIC_WRITE(SONIC_RWP, lp->cur_rwp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 642 | SONIC_WRITE(SONIC_URRA, lp->rra_laddr >> 16); |
Finn Thain | efcce83 | 2005-08-20 15:53:22 +1000 | [diff] [blame] | 643 | SONIC_WRITE(SONIC_EOBC, (SONIC_RBSIZE >> 1) - (lp->dma_bitmode ? 2 : 1)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 644 | |
| 645 | /* load the resource pointers */ |
| 646 | if (sonic_debug > 3) |
Finn Thain | efcce83 | 2005-08-20 15:53:22 +1000 | [diff] [blame] | 647 | printk("sonic_init: issuing RRRA command\n"); |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 648 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 649 | SONIC_WRITE(SONIC_CMD, SONIC_CR_RRRA); |
| 650 | i = 0; |
| 651 | while (i++ < 100) { |
| 652 | if (SONIC_READ(SONIC_CMD) & SONIC_CR_RRRA) |
| 653 | break; |
| 654 | } |
| 655 | |
| 656 | if (sonic_debug > 2) |
Finn Thain | efcce83 | 2005-08-20 15:53:22 +1000 | [diff] [blame] | 657 | printk("sonic_init: status=%x i=%d\n", SONIC_READ(SONIC_CMD), i); |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 658 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 659 | /* |
| 660 | * Initialize the receive descriptors so that they |
| 661 | * become a circular linked list, ie. let the last |
| 662 | * descriptor point to the first again. |
| 663 | */ |
| 664 | if (sonic_debug > 2) |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 665 | printk("sonic_init: initialize receive descriptors\n"); |
Finn Thain | efcce83 | 2005-08-20 15:53:22 +1000 | [diff] [blame] | 666 | for (i=0; i<SONIC_NUM_RDS; i++) { |
| 667 | sonic_rda_put(dev, i, SONIC_RD_STATUS, 0); |
| 668 | sonic_rda_put(dev, i, SONIC_RD_PKTLEN, 0); |
| 669 | sonic_rda_put(dev, i, SONIC_RD_PKTPTR_L, 0); |
| 670 | sonic_rda_put(dev, i, SONIC_RD_PKTPTR_H, 0); |
| 671 | sonic_rda_put(dev, i, SONIC_RD_SEQNO, 0); |
| 672 | sonic_rda_put(dev, i, SONIC_RD_IN_USE, 1); |
| 673 | sonic_rda_put(dev, i, SONIC_RD_LINK, |
| 674 | lp->rda_laddr + |
| 675 | ((i+1) * SIZEOF_SONIC_RD * SONIC_BUS_SCALE(lp->dma_bitmode))); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 676 | } |
| 677 | /* fix last descriptor */ |
Finn Thain | efcce83 | 2005-08-20 15:53:22 +1000 | [diff] [blame] | 678 | sonic_rda_put(dev, SONIC_NUM_RDS - 1, SONIC_RD_LINK, |
| 679 | (lp->rda_laddr & 0xffff) | SONIC_EOL); |
| 680 | lp->eol_rx = SONIC_NUM_RDS - 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 681 | lp->cur_rx = 0; |
| 682 | SONIC_WRITE(SONIC_URDA, lp->rda_laddr >> 16); |
| 683 | SONIC_WRITE(SONIC_CRDA, lp->rda_laddr & 0xffff); |
| 684 | |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 685 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 686 | * initialize transmit descriptors |
| 687 | */ |
| 688 | if (sonic_debug > 2) |
| 689 | printk("sonic_init: initialize transmit descriptors\n"); |
| 690 | for (i = 0; i < SONIC_NUM_TDS; i++) { |
Finn Thain | efcce83 | 2005-08-20 15:53:22 +1000 | [diff] [blame] | 691 | sonic_tda_put(dev, i, SONIC_TD_STATUS, 0); |
| 692 | sonic_tda_put(dev, i, SONIC_TD_CONFIG, 0); |
| 693 | sonic_tda_put(dev, i, SONIC_TD_PKTSIZE, 0); |
| 694 | sonic_tda_put(dev, i, SONIC_TD_FRAG_COUNT, 0); |
| 695 | sonic_tda_put(dev, i, SONIC_TD_LINK, |
| 696 | (lp->tda_laddr & 0xffff) + |
| 697 | (i + 1) * SIZEOF_SONIC_TD * SONIC_BUS_SCALE(lp->dma_bitmode)); |
| 698 | lp->tx_skb[i] = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 699 | } |
Finn Thain | efcce83 | 2005-08-20 15:53:22 +1000 | [diff] [blame] | 700 | /* fix last descriptor */ |
| 701 | sonic_tda_put(dev, SONIC_NUM_TDS - 1, SONIC_TD_LINK, |
| 702 | (lp->tda_laddr & 0xffff)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 703 | |
| 704 | SONIC_WRITE(SONIC_UTDA, lp->tda_laddr >> 16); |
| 705 | SONIC_WRITE(SONIC_CTDA, lp->tda_laddr & 0xffff); |
Finn Thain | efcce83 | 2005-08-20 15:53:22 +1000 | [diff] [blame] | 706 | lp->cur_tx = lp->next_tx = 0; |
| 707 | lp->eol_tx = SONIC_NUM_TDS - 1; |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 708 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 709 | /* |
| 710 | * put our own address to CAM desc[0] |
| 711 | */ |
Finn Thain | efcce83 | 2005-08-20 15:53:22 +1000 | [diff] [blame] | 712 | sonic_cda_put(dev, 0, SONIC_CD_CAP0, dev->dev_addr[1] << 8 | dev->dev_addr[0]); |
| 713 | sonic_cda_put(dev, 0, SONIC_CD_CAP1, dev->dev_addr[3] << 8 | dev->dev_addr[2]); |
| 714 | sonic_cda_put(dev, 0, SONIC_CD_CAP2, dev->dev_addr[5] << 8 | dev->dev_addr[4]); |
| 715 | sonic_set_cam_enable(dev, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 716 | |
| 717 | for (i = 0; i < 16; i++) |
Finn Thain | efcce83 | 2005-08-20 15:53:22 +1000 | [diff] [blame] | 718 | sonic_cda_put(dev, i, SONIC_CD_ENTRY_POINTER, i); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 719 | |
| 720 | /* |
| 721 | * initialize CAM registers |
| 722 | */ |
| 723 | SONIC_WRITE(SONIC_CDP, lp->cda_laddr & 0xffff); |
| 724 | SONIC_WRITE(SONIC_CDC, 16); |
| 725 | |
| 726 | /* |
| 727 | * load the CAM |
| 728 | */ |
| 729 | SONIC_WRITE(SONIC_CMD, SONIC_CR_LCAM); |
| 730 | |
| 731 | i = 0; |
| 732 | while (i++ < 100) { |
| 733 | if (SONIC_READ(SONIC_ISR) & SONIC_INT_LCD) |
| 734 | break; |
| 735 | } |
| 736 | if (sonic_debug > 2) { |
Finn Thain | efcce83 | 2005-08-20 15:53:22 +1000 | [diff] [blame] | 737 | printk("sonic_init: CMD=%x, ISR=%x\n, i=%d", |
| 738 | SONIC_READ(SONIC_CMD), SONIC_READ(SONIC_ISR), i); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 739 | } |
| 740 | |
| 741 | /* |
| 742 | * enable receiver, disable loopback |
| 743 | * and enable all interrupts |
| 744 | */ |
| 745 | SONIC_WRITE(SONIC_CMD, SONIC_CR_RXEN | SONIC_CR_STP); |
| 746 | SONIC_WRITE(SONIC_RCR, SONIC_RCR_DEFAULT); |
| 747 | SONIC_WRITE(SONIC_TCR, SONIC_TCR_DEFAULT); |
| 748 | SONIC_WRITE(SONIC_ISR, 0x7fff); |
| 749 | SONIC_WRITE(SONIC_IMR, SONIC_IMR_DEFAULT); |
| 750 | |
| 751 | cmd = SONIC_READ(SONIC_CMD); |
| 752 | if ((cmd & SONIC_CR_RXEN) == 0 || (cmd & SONIC_CR_STP) == 0) |
Finn Thain | efcce83 | 2005-08-20 15:53:22 +1000 | [diff] [blame] | 753 | printk(KERN_ERR "sonic_init: failed, status=%x\n", cmd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 754 | |
| 755 | if (sonic_debug > 2) |
| 756 | printk("sonic_init: new status=%x\n", |
| 757 | SONIC_READ(SONIC_CMD)); |
| 758 | |
| 759 | return 0; |
| 760 | } |
| 761 | |
| 762 | MODULE_LICENSE("GPL"); |