1 /* 2 * Network device driver for Cell Processor-Based Blade and Celleb platform 3 * 4 * (C) Copyright IBM Corp. 2005 5 * (C) Copyright 2006 TOSHIBA CORPORATION 6 * 7 * Authors : Utz Bacher <utz.bacher@de.ibm.com> 8 * Jens Osterkamp <Jens.Osterkamp@de.ibm.com> 9 * 10 * This program is free software; you can redistribute it and/or modify 11 * it under the terms of the GNU General Public License as published by 12 * the Free Software Foundation; either version 2, or (at your option) 13 * any later version. 14 * 15 * This program is distributed in the hope that it will be useful, 16 * but WITHOUT ANY WARRANTY; without even the implied warranty of 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18 * GNU General Public License for more details. 19 * 20 * You should have received a copy of the GNU General Public License 21 * along with this program; if not, write to the Free Software 22 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 23 */ 24 25 #include <linux/compiler.h> 26 #include <linux/crc32.h> 27 #include <linux/delay.h> 28 #include <linux/etherdevice.h> 29 #include <linux/ethtool.h> 30 #include <linux/firmware.h> 31 #include <linux/if_vlan.h> 32 #include <linux/in.h> 33 #include <linux/init.h> 34 #include <linux/interrupt.h> 35 #include <linux/gfp.h> 36 #include <linux/ioport.h> 37 #include <linux/ip.h> 38 #include <linux/kernel.h> 39 #include <linux/mii.h> 40 #include <linux/module.h> 41 #include <linux/netdevice.h> 42 #include <linux/device.h> 43 #include <linux/pci.h> 44 #include <linux/skbuff.h> 45 #include <linux/tcp.h> 46 #include <linux/types.h> 47 #include <linux/vmalloc.h> 48 #include <linux/wait.h> 49 #include <linux/workqueue.h> 50 #include <linux/bitops.h> 51 #include <asm/pci-bridge.h> 52 #include <net/checksum.h> 53 54 #include "spider_net.h" 55 56 MODULE_AUTHOR("Utz Bacher <utz.bacher@de.ibm.com> and Jens Osterkamp " \ 57 "<Jens.Osterkamp@de.ibm.com>"); 58 MODULE_DESCRIPTION("Spider Southbridge Gigabit Ethernet driver"); 59 MODULE_LICENSE("GPL"); 60 MODULE_VERSION(VERSION); 61 MODULE_FIRMWARE(SPIDER_NET_FIRMWARE_NAME); 62 63 static int rx_descriptors = SPIDER_NET_RX_DESCRIPTORS_DEFAULT; 64 static int tx_descriptors = SPIDER_NET_TX_DESCRIPTORS_DEFAULT; 65 66 module_param(rx_descriptors, int, 0444); 67 module_param(tx_descriptors, int, 0444); 68 69 MODULE_PARM_DESC(rx_descriptors, "number of descriptors used " \ 70 "in rx chains"); 71 MODULE_PARM_DESC(tx_descriptors, "number of descriptors used " \ 72 "in tx chain"); 73 74 char spider_net_driver_name[] = "spidernet"; 75 76 static DEFINE_PCI_DEVICE_TABLE(spider_net_pci_tbl) = { 77 { PCI_VENDOR_ID_TOSHIBA_2, PCI_DEVICE_ID_TOSHIBA_SPIDER_NET, 78 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, 79 { 0, } 80 }; 81 82 MODULE_DEVICE_TABLE(pci, spider_net_pci_tbl); 83 84 /** 85 * spider_net_read_reg - reads an SMMIO register of a card 86 * @card: device structure 87 * @reg: register to read from 88 * 89 * returns the content of the specified SMMIO register. 90 */ 91 static inline u32 92 spider_net_read_reg(struct spider_net_card *card, u32 reg) 93 { 94 /* We use the powerpc specific variants instead of readl_be() because 95 * we know spidernet is not a real PCI device and we can thus avoid the 96 * performance hit caused by the PCI workarounds. 97 */ 98 return in_be32(card->regs + reg); 99 } 100 101 /** 102 * spider_net_write_reg - writes to an SMMIO register of a card 103 * @card: device structure 104 * @reg: register to write to 105 * @value: value to write into the specified SMMIO register 106 */ 107 static inline void 108 spider_net_write_reg(struct spider_net_card *card, u32 reg, u32 value) 109 { 110 /* We use the powerpc specific variants instead of writel_be() because 111 * we know spidernet is not a real PCI device and we can thus avoid the 112 * performance hit caused by the PCI workarounds. 113 */ 114 out_be32(card->regs + reg, value); 115 } 116 117 /** 118 * spider_net_write_phy - write to phy register 119 * @netdev: adapter to be written to 120 * @mii_id: id of MII 121 * @reg: PHY register 122 * @val: value to be written to phy register 123 * 124 * spider_net_write_phy_register writes to an arbitrary PHY 125 * register via the spider GPCWOPCMD register. We assume the queue does 126 * not run full (not more than 15 commands outstanding). 127 **/ 128 static void 129 spider_net_write_phy(struct net_device *netdev, int mii_id, 130 int reg, int val) 131 { 132 struct spider_net_card *card = netdev_priv(netdev); 133 u32 writevalue; 134 135 writevalue = ((u32)mii_id << 21) | 136 ((u32)reg << 16) | ((u32)val); 137 138 spider_net_write_reg(card, SPIDER_NET_GPCWOPCMD, writevalue); 139 } 140 141 /** 142 * spider_net_read_phy - read from phy register 143 * @netdev: network device to be read from 144 * @mii_id: id of MII 145 * @reg: PHY register 146 * 147 * Returns value read from PHY register 148 * 149 * spider_net_write_phy reads from an arbitrary PHY 150 * register via the spider GPCROPCMD register 151 **/ 152 static int 153 spider_net_read_phy(struct net_device *netdev, int mii_id, int reg) 154 { 155 struct spider_net_card *card = netdev_priv(netdev); 156 u32 readvalue; 157 158 readvalue = ((u32)mii_id << 21) | ((u32)reg << 16); 159 spider_net_write_reg(card, SPIDER_NET_GPCROPCMD, readvalue); 160 161 /* we don't use semaphores to wait for an SPIDER_NET_GPROPCMPINT 162 * interrupt, as we poll for the completion of the read operation 163 * in spider_net_read_phy. Should take about 50 us */ 164 do { 165 readvalue = spider_net_read_reg(card, SPIDER_NET_GPCROPCMD); 166 } while (readvalue & SPIDER_NET_GPREXEC); 167 168 readvalue &= SPIDER_NET_GPRDAT_MASK; 169 170 return readvalue; 171 } 172 173 /** 174 * spider_net_setup_aneg - initial auto-negotiation setup 175 * @card: device structure 176 **/ 177 static void 178 spider_net_setup_aneg(struct spider_net_card *card) 179 { 180 struct mii_phy *phy = &card->phy; 181 u32 advertise = 0; 182 u16 bmsr, estat; 183 184 bmsr = spider_net_read_phy(card->netdev, phy->mii_id, MII_BMSR); 185 estat = spider_net_read_phy(card->netdev, phy->mii_id, MII_ESTATUS); 186 187 if (bmsr & BMSR_10HALF) 188 advertise |= ADVERTISED_10baseT_Half; 189 if (bmsr & BMSR_10FULL) 190 advertise |= ADVERTISED_10baseT_Full; 191 if (bmsr & BMSR_100HALF) 192 advertise |= ADVERTISED_100baseT_Half; 193 if (bmsr & BMSR_100FULL) 194 advertise |= ADVERTISED_100baseT_Full; 195 196 if ((bmsr & BMSR_ESTATEN) && (estat & ESTATUS_1000_TFULL)) 197 advertise |= SUPPORTED_1000baseT_Full; 198 if ((bmsr & BMSR_ESTATEN) && (estat & ESTATUS_1000_THALF)) 199 advertise |= SUPPORTED_1000baseT_Half; 200 201 sungem_phy_probe(phy, phy->mii_id); 202 phy->def->ops->setup_aneg(phy, advertise); 203 204 } 205 206 /** 207 * spider_net_rx_irq_off - switch off rx irq on this spider card 208 * @card: device structure 209 * 210 * switches off rx irq by masking them out in the GHIINTnMSK register 211 */ 212 static void 213 spider_net_rx_irq_off(struct spider_net_card *card) 214 { 215 u32 regvalue; 216 217 regvalue = SPIDER_NET_INT0_MASK_VALUE & (~SPIDER_NET_RXINT); 218 spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, regvalue); 219 } 220 221 /** 222 * spider_net_rx_irq_on - switch on rx irq on this spider card 223 * @card: device structure 224 * 225 * switches on rx irq by enabling them in the GHIINTnMSK register 226 */ 227 static void 228 spider_net_rx_irq_on(struct spider_net_card *card) 229 { 230 u32 regvalue; 231 232 regvalue = SPIDER_NET_INT0_MASK_VALUE | SPIDER_NET_RXINT; 233 spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, regvalue); 234 } 235 236 /** 237 * spider_net_set_promisc - sets the unicast address or the promiscuous mode 238 * @card: card structure 239 * 240 * spider_net_set_promisc sets the unicast destination address filter and 241 * thus either allows for non-promisc mode or promisc mode 242 */ 243 static void 244 spider_net_set_promisc(struct spider_net_card *card) 245 { 246 u32 macu, macl; 247 struct net_device *netdev = card->netdev; 248 249 if (netdev->flags & IFF_PROMISC) { 250 /* clear destination entry 0 */ 251 spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR, 0); 252 spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR + 0x04, 0); 253 spider_net_write_reg(card, SPIDER_NET_GMRUA0FIL15R, 254 SPIDER_NET_PROMISC_VALUE); 255 } else { 256 macu = netdev->dev_addr[0]; 257 macu <<= 8; 258 macu |= netdev->dev_addr[1]; 259 memcpy(&macl, &netdev->dev_addr[2], sizeof(macl)); 260 261 macu |= SPIDER_NET_UA_DESCR_VALUE; 262 spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR, macu); 263 spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR + 0x04, macl); 264 spider_net_write_reg(card, SPIDER_NET_GMRUA0FIL15R, 265 SPIDER_NET_NONPROMISC_VALUE); 266 } 267 } 268 269 /** 270 * spider_net_get_mac_address - read mac address from spider card 271 * @card: device structure 272 * 273 * reads MAC address from GMACUNIMACU and GMACUNIMACL registers 274 */ 275 static int 276 spider_net_get_mac_address(struct net_device *netdev) 277 { 278 struct spider_net_card *card = netdev_priv(netdev); 279 u32 macl, macu; 280 281 macl = spider_net_read_reg(card, SPIDER_NET_GMACUNIMACL); 282 macu = spider_net_read_reg(card, SPIDER_NET_GMACUNIMACU); 283 284 netdev->dev_addr[0] = (macu >> 24) & 0xff; 285 netdev->dev_addr[1] = (macu >> 16) & 0xff; 286 netdev->dev_addr[2] = (macu >> 8) & 0xff; 287 netdev->dev_addr[3] = macu & 0xff; 288 netdev->dev_addr[4] = (macl >> 8) & 0xff; 289 netdev->dev_addr[5] = macl & 0xff; 290 291 if (!is_valid_ether_addr(&netdev->dev_addr[0])) 292 return -EINVAL; 293 294 return 0; 295 } 296 297 /** 298 * spider_net_get_descr_status -- returns the status of a descriptor 299 * @descr: descriptor to look at 300 * 301 * returns the status as in the dmac_cmd_status field of the descriptor 302 */ 303 static inline int 304 spider_net_get_descr_status(struct spider_net_hw_descr *hwdescr) 305 { 306 return hwdescr->dmac_cmd_status & SPIDER_NET_DESCR_IND_PROC_MASK; 307 } 308 309 /** 310 * spider_net_free_chain - free descriptor chain 311 * @card: card structure 312 * @chain: address of chain 313 * 314 */ 315 static void 316 spider_net_free_chain(struct spider_net_card *card, 317 struct spider_net_descr_chain *chain) 318 { 319 struct spider_net_descr *descr; 320 321 descr = chain->ring; 322 do { 323 descr->bus_addr = 0; 324 descr->hwdescr->next_descr_addr = 0; 325 descr = descr->next; 326 } while (descr != chain->ring); 327 328 dma_free_coherent(&card->pdev->dev, chain->num_desc, 329 chain->hwring, chain->dma_addr); 330 } 331 332 /** 333 * spider_net_init_chain - alloc and link descriptor chain 334 * @card: card structure 335 * @chain: address of chain 336 * 337 * We manage a circular list that mirrors the hardware structure, 338 * except that the hardware uses bus addresses. 339 * 340 * Returns 0 on success, <0 on failure 341 */ 342 static int 343 spider_net_init_chain(struct spider_net_card *card, 344 struct spider_net_descr_chain *chain) 345 { 346 int i; 347 struct spider_net_descr *descr; 348 struct spider_net_hw_descr *hwdescr; 349 dma_addr_t buf; 350 size_t alloc_size; 351 352 alloc_size = chain->num_desc * sizeof(struct spider_net_hw_descr); 353 354 chain->hwring = dma_alloc_coherent(&card->pdev->dev, alloc_size, 355 &chain->dma_addr, GFP_KERNEL); 356 357 if (!chain->hwring) 358 return -ENOMEM; 359 360 memset(chain->ring, 0, chain->num_desc * sizeof(struct spider_net_descr)); 361 362 /* Set up the hardware pointers in each descriptor */ 363 descr = chain->ring; 364 hwdescr = chain->hwring; 365 buf = chain->dma_addr; 366 for (i=0; i < chain->num_desc; i++, descr++, hwdescr++) { 367 hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE; 368 hwdescr->next_descr_addr = 0; 369 370 descr->hwdescr = hwdescr; 371 descr->bus_addr = buf; 372 descr->next = descr + 1; 373 descr->prev = descr - 1; 374 375 buf += sizeof(struct spider_net_hw_descr); 376 } 377 /* do actual circular list */ 378 (descr-1)->next = chain->ring; 379 chain->ring->prev = descr-1; 380 381 spin_lock_init(&chain->lock); 382 chain->head = chain->ring; 383 chain->tail = chain->ring; 384 return 0; 385 } 386 387 /** 388 * spider_net_free_rx_chain_contents - frees descr contents in rx chain 389 * @card: card structure 390 * 391 * returns 0 on success, <0 on failure 392 */ 393 static void 394 spider_net_free_rx_chain_contents(struct spider_net_card *card) 395 { 396 struct spider_net_descr *descr; 397 398 descr = card->rx_chain.head; 399 do { 400 if (descr->skb) { 401 pci_unmap_single(card->pdev, descr->hwdescr->buf_addr, 402 SPIDER_NET_MAX_FRAME, 403 PCI_DMA_BIDIRECTIONAL); 404 dev_kfree_skb(descr->skb); 405 descr->skb = NULL; 406 } 407 descr = descr->next; 408 } while (descr != card->rx_chain.head); 409 } 410 411 /** 412 * spider_net_prepare_rx_descr - Reinitialize RX descriptor 413 * @card: card structure 414 * @descr: descriptor to re-init 415 * 416 * Return 0 on success, <0 on failure. 417 * 418 * Allocates a new rx skb, iommu-maps it and attaches it to the 419 * descriptor. Mark the descriptor as activated, ready-to-use. 420 */ 421 static int 422 spider_net_prepare_rx_descr(struct spider_net_card *card, 423 struct spider_net_descr *descr) 424 { 425 struct spider_net_hw_descr *hwdescr = descr->hwdescr; 426 dma_addr_t buf; 427 int offset; 428 int bufsize; 429 430 /* we need to round up the buffer size to a multiple of 128 */ 431 bufsize = (SPIDER_NET_MAX_FRAME + SPIDER_NET_RXBUF_ALIGN - 1) & 432 (~(SPIDER_NET_RXBUF_ALIGN - 1)); 433 434 /* and we need to have it 128 byte aligned, therefore we allocate a 435 * bit more */ 436 /* allocate an skb */ 437 descr->skb = netdev_alloc_skb(card->netdev, 438 bufsize + SPIDER_NET_RXBUF_ALIGN - 1); 439 if (!descr->skb) { 440 if (netif_msg_rx_err(card) && net_ratelimit()) 441 dev_err(&card->netdev->dev, 442 "Not enough memory to allocate rx buffer\n"); 443 card->spider_stats.alloc_rx_skb_error++; 444 return -ENOMEM; 445 } 446 hwdescr->buf_size = bufsize; 447 hwdescr->result_size = 0; 448 hwdescr->valid_size = 0; 449 hwdescr->data_status = 0; 450 hwdescr->data_error = 0; 451 452 offset = ((unsigned long)descr->skb->data) & 453 (SPIDER_NET_RXBUF_ALIGN - 1); 454 if (offset) 455 skb_reserve(descr->skb, SPIDER_NET_RXBUF_ALIGN - offset); 456 /* iommu-map the skb */ 457 buf = pci_map_single(card->pdev, descr->skb->data, 458 SPIDER_NET_MAX_FRAME, PCI_DMA_FROMDEVICE); 459 if (pci_dma_mapping_error(card->pdev, buf)) { 460 dev_kfree_skb_any(descr->skb); 461 descr->skb = NULL; 462 if (netif_msg_rx_err(card) && net_ratelimit()) 463 dev_err(&card->netdev->dev, "Could not iommu-map rx buffer\n"); 464 card->spider_stats.rx_iommu_map_error++; 465 hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE; 466 } else { 467 hwdescr->buf_addr = buf; 468 wmb(); 469 hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_CARDOWNED | 470 SPIDER_NET_DMAC_NOINTR_COMPLETE; 471 } 472 473 return 0; 474 } 475 476 /** 477 * spider_net_enable_rxchtails - sets RX dmac chain tail addresses 478 * @card: card structure 479 * 480 * spider_net_enable_rxchtails sets the RX DMAC chain tail addresses in the 481 * chip by writing to the appropriate register. DMA is enabled in 482 * spider_net_enable_rxdmac. 483 */ 484 static inline void 485 spider_net_enable_rxchtails(struct spider_net_card *card) 486 { 487 /* assume chain is aligned correctly */ 488 spider_net_write_reg(card, SPIDER_NET_GDADCHA , 489 card->rx_chain.tail->bus_addr); 490 } 491 492 /** 493 * spider_net_enable_rxdmac - enables a receive DMA controller 494 * @card: card structure 495 * 496 * spider_net_enable_rxdmac enables the DMA controller by setting RX_DMA_EN 497 * in the GDADMACCNTR register 498 */ 499 static inline void 500 spider_net_enable_rxdmac(struct spider_net_card *card) 501 { 502 wmb(); 503 spider_net_write_reg(card, SPIDER_NET_GDADMACCNTR, 504 SPIDER_NET_DMA_RX_VALUE); 505 } 506 507 /** 508 * spider_net_disable_rxdmac - disables the receive DMA controller 509 * @card: card structure 510 * 511 * spider_net_disable_rxdmac terminates processing on the DMA controller 512 * by turing off the DMA controller, with the force-end flag set. 513 */ 514 static inline void 515 spider_net_disable_rxdmac(struct spider_net_card *card) 516 { 517 spider_net_write_reg(card, SPIDER_NET_GDADMACCNTR, 518 SPIDER_NET_DMA_RX_FEND_VALUE); 519 } 520 521 /** 522 * spider_net_refill_rx_chain - refills descriptors/skbs in the rx chains 523 * @card: card structure 524 * 525 * refills descriptors in the rx chain: allocates skbs and iommu-maps them. 526 */ 527 static void 528 spider_net_refill_rx_chain(struct spider_net_card *card) 529 { 530 struct spider_net_descr_chain *chain = &card->rx_chain; 531 unsigned long flags; 532 533 /* one context doing the refill (and a second context seeing that 534 * and omitting it) is ok. If called by NAPI, we'll be called again 535 * as spider_net_decode_one_descr is called several times. If some 536 * interrupt calls us, the NAPI is about to clean up anyway. */ 537 if (!spin_trylock_irqsave(&chain->lock, flags)) 538 return; 539 540 while (spider_net_get_descr_status(chain->head->hwdescr) == 541 SPIDER_NET_DESCR_NOT_IN_USE) { 542 if (spider_net_prepare_rx_descr(card, chain->head)) 543 break; 544 chain->head = chain->head->next; 545 } 546 547 spin_unlock_irqrestore(&chain->lock, flags); 548 } 549 550 /** 551 * spider_net_alloc_rx_skbs - Allocates rx skbs in rx descriptor chains 552 * @card: card structure 553 * 554 * Returns 0 on success, <0 on failure. 555 */ 556 static int 557 spider_net_alloc_rx_skbs(struct spider_net_card *card) 558 { 559 struct spider_net_descr_chain *chain = &card->rx_chain; 560 struct spider_net_descr *start = chain->tail; 561 struct spider_net_descr *descr = start; 562 563 /* Link up the hardware chain pointers */ 564 do { 565 descr->prev->hwdescr->next_descr_addr = descr->bus_addr; 566 descr = descr->next; 567 } while (descr != start); 568 569 /* Put at least one buffer into the chain. if this fails, 570 * we've got a problem. If not, spider_net_refill_rx_chain 571 * will do the rest at the end of this function. */ 572 if (spider_net_prepare_rx_descr(card, chain->head)) 573 goto error; 574 else 575 chain->head = chain->head->next; 576 577 /* This will allocate the rest of the rx buffers; 578 * if not, it's business as usual later on. */ 579 spider_net_refill_rx_chain(card); 580 spider_net_enable_rxdmac(card); 581 return 0; 582 583 error: 584 spider_net_free_rx_chain_contents(card); 585 return -ENOMEM; 586 } 587 588 /** 589 * spider_net_get_multicast_hash - generates hash for multicast filter table 590 * @addr: multicast address 591 * 592 * returns the hash value. 593 * 594 * spider_net_get_multicast_hash calculates a hash value for a given multicast 595 * address, that is used to set the multicast filter tables 596 */ 597 static u8 598 spider_net_get_multicast_hash(struct net_device *netdev, __u8 *addr) 599 { 600 u32 crc; 601 u8 hash; 602 char addr_for_crc[ETH_ALEN] = { 0, }; 603 int i, bit; 604 605 for (i = 0; i < ETH_ALEN * 8; i++) { 606 bit = (addr[i / 8] >> (i % 8)) & 1; 607 addr_for_crc[ETH_ALEN - 1 - i / 8] += bit << (7 - (i % 8)); 608 } 609 610 crc = crc32_be(~0, addr_for_crc, netdev->addr_len); 611 612 hash = (crc >> 27); 613 hash <<= 3; 614 hash |= crc & 7; 615 hash &= 0xff; 616 617 return hash; 618 } 619 620 /** 621 * spider_net_set_multi - sets multicast addresses and promisc flags 622 * @netdev: interface device structure 623 * 624 * spider_net_set_multi configures multicast addresses as needed for the 625 * netdev interface. It also sets up multicast, allmulti and promisc 626 * flags appropriately 627 */ 628 static void 629 spider_net_set_multi(struct net_device *netdev) 630 { 631 struct netdev_hw_addr *ha; 632 u8 hash; 633 int i; 634 u32 reg; 635 struct spider_net_card *card = netdev_priv(netdev); 636 unsigned long bitmask[SPIDER_NET_MULTICAST_HASHES / BITS_PER_LONG] = 637 {0, }; 638 639 spider_net_set_promisc(card); 640 641 if (netdev->flags & IFF_ALLMULTI) { 642 for (i = 0; i < SPIDER_NET_MULTICAST_HASHES; i++) { 643 set_bit(i, bitmask); 644 } 645 goto write_hash; 646 } 647 648 /* well, we know, what the broadcast hash value is: it's xfd 649 hash = spider_net_get_multicast_hash(netdev, netdev->broadcast); */ 650 set_bit(0xfd, bitmask); 651 652 netdev_for_each_mc_addr(ha, netdev) { 653 hash = spider_net_get_multicast_hash(netdev, ha->addr); 654 set_bit(hash, bitmask); 655 } 656 657 write_hash: 658 for (i = 0; i < SPIDER_NET_MULTICAST_HASHES / 4; i++) { 659 reg = 0; 660 if (test_bit(i * 4, bitmask)) 661 reg += 0x08; 662 reg <<= 8; 663 if (test_bit(i * 4 + 1, bitmask)) 664 reg += 0x08; 665 reg <<= 8; 666 if (test_bit(i * 4 + 2, bitmask)) 667 reg += 0x08; 668 reg <<= 8; 669 if (test_bit(i * 4 + 3, bitmask)) 670 reg += 0x08; 671 672 spider_net_write_reg(card, SPIDER_NET_GMRMHFILnR + i * 4, reg); 673 } 674 } 675 676 /** 677 * spider_net_prepare_tx_descr - fill tx descriptor with skb data 678 * @card: card structure 679 * @skb: packet to use 680 * 681 * returns 0 on success, <0 on failure. 682 * 683 * fills out the descriptor structure with skb data and len. Copies data, 684 * if needed (32bit DMA!) 685 */ 686 static int 687 spider_net_prepare_tx_descr(struct spider_net_card *card, 688 struct sk_buff *skb) 689 { 690 struct spider_net_descr_chain *chain = &card->tx_chain; 691 struct spider_net_descr *descr; 692 struct spider_net_hw_descr *hwdescr; 693 dma_addr_t buf; 694 unsigned long flags; 695 696 buf = pci_map_single(card->pdev, skb->data, skb->len, PCI_DMA_TODEVICE); 697 if (pci_dma_mapping_error(card->pdev, buf)) { 698 if (netif_msg_tx_err(card) && net_ratelimit()) 699 dev_err(&card->netdev->dev, "could not iommu-map packet (%p, %i). " 700 "Dropping packet\n", skb->data, skb->len); 701 card->spider_stats.tx_iommu_map_error++; 702 return -ENOMEM; 703 } 704 705 spin_lock_irqsave(&chain->lock, flags); 706 descr = card->tx_chain.head; 707 if (descr->next == chain->tail->prev) { 708 spin_unlock_irqrestore(&chain->lock, flags); 709 pci_unmap_single(card->pdev, buf, skb->len, PCI_DMA_TODEVICE); 710 return -ENOMEM; 711 } 712 hwdescr = descr->hwdescr; 713 chain->head = descr->next; 714 715 descr->skb = skb; 716 hwdescr->buf_addr = buf; 717 hwdescr->buf_size = skb->len; 718 hwdescr->next_descr_addr = 0; 719 hwdescr->data_status = 0; 720 721 hwdescr->dmac_cmd_status = 722 SPIDER_NET_DESCR_CARDOWNED | SPIDER_NET_DMAC_TXFRMTL; 723 spin_unlock_irqrestore(&chain->lock, flags); 724 725 if (skb->ip_summed == CHECKSUM_PARTIAL) 726 switch (ip_hdr(skb)->protocol) { 727 case IPPROTO_TCP: 728 hwdescr->dmac_cmd_status |= SPIDER_NET_DMAC_TCP; 729 break; 730 case IPPROTO_UDP: 731 hwdescr->dmac_cmd_status |= SPIDER_NET_DMAC_UDP; 732 break; 733 } 734 735 /* Chain the bus address, so that the DMA engine finds this descr. */ 736 wmb(); 737 descr->prev->hwdescr->next_descr_addr = descr->bus_addr; 738 739 card->netdev->trans_start = jiffies; /* set netdev watchdog timer */ 740 return 0; 741 } 742 743 static int 744 spider_net_set_low_watermark(struct spider_net_card *card) 745 { 746 struct spider_net_descr *descr = card->tx_chain.tail; 747 struct spider_net_hw_descr *hwdescr; 748 unsigned long flags; 749 int status; 750 int cnt=0; 751 int i; 752 753 /* Measure the length of the queue. Measurement does not 754 * need to be precise -- does not need a lock. */ 755 while (descr != card->tx_chain.head) { 756 status = descr->hwdescr->dmac_cmd_status & SPIDER_NET_DESCR_NOT_IN_USE; 757 if (status == SPIDER_NET_DESCR_NOT_IN_USE) 758 break; 759 descr = descr->next; 760 cnt++; 761 } 762 763 /* If TX queue is short, don't even bother with interrupts */ 764 if (cnt < card->tx_chain.num_desc/4) 765 return cnt; 766 767 /* Set low-watermark 3/4th's of the way into the queue. */ 768 descr = card->tx_chain.tail; 769 cnt = (cnt*3)/4; 770 for (i=0;i<cnt; i++) 771 descr = descr->next; 772 773 /* Set the new watermark, clear the old watermark */ 774 spin_lock_irqsave(&card->tx_chain.lock, flags); 775 descr->hwdescr->dmac_cmd_status |= SPIDER_NET_DESCR_TXDESFLG; 776 if (card->low_watermark && card->low_watermark != descr) { 777 hwdescr = card->low_watermark->hwdescr; 778 hwdescr->dmac_cmd_status = 779 hwdescr->dmac_cmd_status & ~SPIDER_NET_DESCR_TXDESFLG; 780 } 781 card->low_watermark = descr; 782 spin_unlock_irqrestore(&card->tx_chain.lock, flags); 783 return cnt; 784 } 785 786 /** 787 * spider_net_release_tx_chain - processes sent tx descriptors 788 * @card: adapter structure 789 * @brutal: if set, don't care about whether descriptor seems to be in use 790 * 791 * returns 0 if the tx ring is empty, otherwise 1. 792 * 793 * spider_net_release_tx_chain releases the tx descriptors that spider has 794 * finished with (if non-brutal) or simply release tx descriptors (if brutal). 795 * If some other context is calling this function, we return 1 so that we're 796 * scheduled again (if we were scheduled) and will not lose initiative. 797 */ 798 static int 799 spider_net_release_tx_chain(struct spider_net_card *card, int brutal) 800 { 801 struct net_device *dev = card->netdev; 802 struct spider_net_descr_chain *chain = &card->tx_chain; 803 struct spider_net_descr *descr; 804 struct spider_net_hw_descr *hwdescr; 805 struct sk_buff *skb; 806 u32 buf_addr; 807 unsigned long flags; 808 int status; 809 810 while (1) { 811 spin_lock_irqsave(&chain->lock, flags); 812 if (chain->tail == chain->head) { 813 spin_unlock_irqrestore(&chain->lock, flags); 814 return 0; 815 } 816 descr = chain->tail; 817 hwdescr = descr->hwdescr; 818 819 status = spider_net_get_descr_status(hwdescr); 820 switch (status) { 821 case SPIDER_NET_DESCR_COMPLETE: 822 dev->stats.tx_packets++; 823 dev->stats.tx_bytes += descr->skb->len; 824 break; 825 826 case SPIDER_NET_DESCR_CARDOWNED: 827 if (!brutal) { 828 spin_unlock_irqrestore(&chain->lock, flags); 829 return 1; 830 } 831 832 /* fallthrough, if we release the descriptors 833 * brutally (then we don't care about 834 * SPIDER_NET_DESCR_CARDOWNED) */ 835 836 case SPIDER_NET_DESCR_RESPONSE_ERROR: 837 case SPIDER_NET_DESCR_PROTECTION_ERROR: 838 case SPIDER_NET_DESCR_FORCE_END: 839 if (netif_msg_tx_err(card)) 840 dev_err(&card->netdev->dev, "forcing end of tx descriptor " 841 "with status x%02x\n", status); 842 dev->stats.tx_errors++; 843 break; 844 845 default: 846 dev->stats.tx_dropped++; 847 if (!brutal) { 848 spin_unlock_irqrestore(&chain->lock, flags); 849 return 1; 850 } 851 } 852 853 chain->tail = descr->next; 854 hwdescr->dmac_cmd_status |= SPIDER_NET_DESCR_NOT_IN_USE; 855 skb = descr->skb; 856 descr->skb = NULL; 857 buf_addr = hwdescr->buf_addr; 858 spin_unlock_irqrestore(&chain->lock, flags); 859 860 /* unmap the skb */ 861 if (skb) { 862 pci_unmap_single(card->pdev, buf_addr, skb->len, 863 PCI_DMA_TODEVICE); 864 dev_kfree_skb(skb); 865 } 866 } 867 return 0; 868 } 869 870 /** 871 * spider_net_kick_tx_dma - enables TX DMA processing 872 * @card: card structure 873 * 874 * This routine will start the transmit DMA running if 875 * it is not already running. This routine ned only be 876 * called when queueing a new packet to an empty tx queue. 877 * Writes the current tx chain head as start address 878 * of the tx descriptor chain and enables the transmission 879 * DMA engine. 880 */ 881 static inline void 882 spider_net_kick_tx_dma(struct spider_net_card *card) 883 { 884 struct spider_net_descr *descr; 885 886 if (spider_net_read_reg(card, SPIDER_NET_GDTDMACCNTR) & 887 SPIDER_NET_TX_DMA_EN) 888 goto out; 889 890 descr = card->tx_chain.tail; 891 for (;;) { 892 if (spider_net_get_descr_status(descr->hwdescr) == 893 SPIDER_NET_DESCR_CARDOWNED) { 894 spider_net_write_reg(card, SPIDER_NET_GDTDCHA, 895 descr->bus_addr); 896 spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR, 897 SPIDER_NET_DMA_TX_VALUE); 898 break; 899 } 900 if (descr == card->tx_chain.head) 901 break; 902 descr = descr->next; 903 } 904 905 out: 906 mod_timer(&card->tx_timer, jiffies + SPIDER_NET_TX_TIMER); 907 } 908 909 /** 910 * spider_net_xmit - transmits a frame over the device 911 * @skb: packet to send out 912 * @netdev: interface device structure 913 * 914 * returns 0 on success, !0 on failure 915 */ 916 static int 917 spider_net_xmit(struct sk_buff *skb, struct net_device *netdev) 918 { 919 int cnt; 920 struct spider_net_card *card = netdev_priv(netdev); 921 922 spider_net_release_tx_chain(card, 0); 923 924 if (spider_net_prepare_tx_descr(card, skb) != 0) { 925 netdev->stats.tx_dropped++; 926 netif_stop_queue(netdev); 927 return NETDEV_TX_BUSY; 928 } 929 930 cnt = spider_net_set_low_watermark(card); 931 if (cnt < 5) 932 spider_net_kick_tx_dma(card); 933 return NETDEV_TX_OK; 934 } 935 936 /** 937 * spider_net_cleanup_tx_ring - cleans up the TX ring 938 * @card: card structure 939 * 940 * spider_net_cleanup_tx_ring is called by either the tx_timer 941 * or from the NAPI polling routine. 942 * This routine releases resources associted with transmitted 943 * packets, including updating the queue tail pointer. 944 */ 945 static void 946 spider_net_cleanup_tx_ring(struct spider_net_card *card) 947 { 948 if ((spider_net_release_tx_chain(card, 0) != 0) && 949 (card->netdev->flags & IFF_UP)) { 950 spider_net_kick_tx_dma(card); 951 netif_wake_queue(card->netdev); 952 } 953 } 954 955 /** 956 * spider_net_do_ioctl - called for device ioctls 957 * @netdev: interface device structure 958 * @ifr: request parameter structure for ioctl 959 * @cmd: command code for ioctl 960 * 961 * returns 0 on success, <0 on failure. Currently, we have no special ioctls. 962 * -EOPNOTSUPP is returned, if an unknown ioctl was requested 963 */ 964 static int 965 spider_net_do_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd) 966 { 967 switch (cmd) { 968 default: 969 return -EOPNOTSUPP; 970 } 971 } 972 973 /** 974 * spider_net_pass_skb_up - takes an skb from a descriptor and passes it on 975 * @descr: descriptor to process 976 * @card: card structure 977 * 978 * Fills out skb structure and passes the data to the stack. 979 * The descriptor state is not changed. 980 */ 981 static void 982 spider_net_pass_skb_up(struct spider_net_descr *descr, 983 struct spider_net_card *card) 984 { 985 struct spider_net_hw_descr *hwdescr = descr->hwdescr; 986 struct sk_buff *skb = descr->skb; 987 struct net_device *netdev = card->netdev; 988 u32 data_status = hwdescr->data_status; 989 u32 data_error = hwdescr->data_error; 990 991 skb_put(skb, hwdescr->valid_size); 992 993 /* the card seems to add 2 bytes of junk in front 994 * of the ethernet frame */ 995 #define SPIDER_MISALIGN 2 996 skb_pull(skb, SPIDER_MISALIGN); 997 skb->protocol = eth_type_trans(skb, netdev); 998 999 /* checksum offload */ 1000 skb_checksum_none_assert(skb); 1001 if (netdev->features & NETIF_F_RXCSUM) { 1002 if ( ( (data_status & SPIDER_NET_DATA_STATUS_CKSUM_MASK) == 1003 SPIDER_NET_DATA_STATUS_CKSUM_MASK) && 1004 !(data_error & SPIDER_NET_DATA_ERR_CKSUM_MASK)) 1005 skb->ip_summed = CHECKSUM_UNNECESSARY; 1006 } 1007 1008 if (data_status & SPIDER_NET_VLAN_PACKET) { 1009 /* further enhancements: HW-accel VLAN */ 1010 } 1011 1012 /* update netdevice statistics */ 1013 netdev->stats.rx_packets++; 1014 netdev->stats.rx_bytes += skb->len; 1015 1016 /* pass skb up to stack */ 1017 netif_receive_skb(skb); 1018 } 1019 1020 static void show_rx_chain(struct spider_net_card *card) 1021 { 1022 struct spider_net_descr_chain *chain = &card->rx_chain; 1023 struct spider_net_descr *start= chain->tail; 1024 struct spider_net_descr *descr= start; 1025 struct spider_net_hw_descr *hwd = start->hwdescr; 1026 struct device *dev = &card->netdev->dev; 1027 u32 curr_desc, next_desc; 1028 int status; 1029 1030 int tot = 0; 1031 int cnt = 0; 1032 int off = start - chain->ring; 1033 int cstat = hwd->dmac_cmd_status; 1034 1035 dev_info(dev, "Total number of descrs=%d\n", 1036 chain->num_desc); 1037 dev_info(dev, "Chain tail located at descr=%d, status=0x%x\n", 1038 off, cstat); 1039 1040 curr_desc = spider_net_read_reg(card, SPIDER_NET_GDACTDPA); 1041 next_desc = spider_net_read_reg(card, SPIDER_NET_GDACNEXTDA); 1042 1043 status = cstat; 1044 do 1045 { 1046 hwd = descr->hwdescr; 1047 off = descr - chain->ring; 1048 status = hwd->dmac_cmd_status; 1049 1050 if (descr == chain->head) 1051 dev_info(dev, "Chain head is at %d, head status=0x%x\n", 1052 off, status); 1053 1054 if (curr_desc == descr->bus_addr) 1055 dev_info(dev, "HW curr desc (GDACTDPA) is at %d, status=0x%x\n", 1056 off, status); 1057 1058 if (next_desc == descr->bus_addr) 1059 dev_info(dev, "HW next desc (GDACNEXTDA) is at %d, status=0x%x\n", 1060 off, status); 1061 1062 if (hwd->next_descr_addr == 0) 1063 dev_info(dev, "chain is cut at %d\n", off); 1064 1065 if (cstat != status) { 1066 int from = (chain->num_desc + off - cnt) % chain->num_desc; 1067 int to = (chain->num_desc + off - 1) % chain->num_desc; 1068 dev_info(dev, "Have %d (from %d to %d) descrs " 1069 "with stat=0x%08x\n", cnt, from, to, cstat); 1070 cstat = status; 1071 cnt = 0; 1072 } 1073 1074 cnt ++; 1075 tot ++; 1076 descr = descr->next; 1077 } while (descr != start); 1078 1079 dev_info(dev, "Last %d descrs with stat=0x%08x " 1080 "for a total of %d descrs\n", cnt, cstat, tot); 1081 1082 #ifdef DEBUG 1083 /* Now dump the whole ring */ 1084 descr = start; 1085 do 1086 { 1087 struct spider_net_hw_descr *hwd = descr->hwdescr; 1088 status = spider_net_get_descr_status(hwd); 1089 cnt = descr - chain->ring; 1090 dev_info(dev, "Descr %d stat=0x%08x skb=%p\n", 1091 cnt, status, descr->skb); 1092 dev_info(dev, "bus addr=%08x buf addr=%08x sz=%d\n", 1093 descr->bus_addr, hwd->buf_addr, hwd->buf_size); 1094 dev_info(dev, "next=%08x result sz=%d valid sz=%d\n", 1095 hwd->next_descr_addr, hwd->result_size, 1096 hwd->valid_size); 1097 dev_info(dev, "dmac=%08x data stat=%08x data err=%08x\n", 1098 hwd->dmac_cmd_status, hwd->data_status, 1099 hwd->data_error); 1100 dev_info(dev, "\n"); 1101 1102 descr = descr->next; 1103 } while (descr != start); 1104 #endif 1105 1106 } 1107 1108 /** 1109 * spider_net_resync_head_ptr - Advance head ptr past empty descrs 1110 * 1111 * If the driver fails to keep up and empty the queue, then the 1112 * hardware wil run out of room to put incoming packets. This 1113 * will cause the hardware to skip descrs that are full (instead 1114 * of halting/retrying). Thus, once the driver runs, it wil need 1115 * to "catch up" to where the hardware chain pointer is at. 1116 */ 1117 static void spider_net_resync_head_ptr(struct spider_net_card *card) 1118 { 1119 unsigned long flags; 1120 struct spider_net_descr_chain *chain = &card->rx_chain; 1121 struct spider_net_descr *descr; 1122 int i, status; 1123 1124 /* Advance head pointer past any empty descrs */ 1125 descr = chain->head; 1126 status = spider_net_get_descr_status(descr->hwdescr); 1127 1128 if (status == SPIDER_NET_DESCR_NOT_IN_USE) 1129 return; 1130 1131 spin_lock_irqsave(&chain->lock, flags); 1132 1133 descr = chain->head; 1134 status = spider_net_get_descr_status(descr->hwdescr); 1135 for (i=0; i<chain->num_desc; i++) { 1136 if (status != SPIDER_NET_DESCR_CARDOWNED) break; 1137 descr = descr->next; 1138 status = spider_net_get_descr_status(descr->hwdescr); 1139 } 1140 chain->head = descr; 1141 1142 spin_unlock_irqrestore(&chain->lock, flags); 1143 } 1144 1145 static int spider_net_resync_tail_ptr(struct spider_net_card *card) 1146 { 1147 struct spider_net_descr_chain *chain = &card->rx_chain; 1148 struct spider_net_descr *descr; 1149 int i, status; 1150 1151 /* Advance tail pointer past any empty and reaped descrs */ 1152 descr = chain->tail; 1153 status = spider_net_get_descr_status(descr->hwdescr); 1154 1155 for (i=0; i<chain->num_desc; i++) { 1156 if ((status != SPIDER_NET_DESCR_CARDOWNED) && 1157 (status != SPIDER_NET_DESCR_NOT_IN_USE)) break; 1158 descr = descr->next; 1159 status = spider_net_get_descr_status(descr->hwdescr); 1160 } 1161 chain->tail = descr; 1162 1163 if ((i == chain->num_desc) || (i == 0)) 1164 return 1; 1165 return 0; 1166 } 1167 1168 /** 1169 * spider_net_decode_one_descr - processes an RX descriptor 1170 * @card: card structure 1171 * 1172 * Returns 1 if a packet has been sent to the stack, otherwise 0. 1173 * 1174 * Processes an RX descriptor by iommu-unmapping the data buffer 1175 * and passing the packet up to the stack. This function is called 1176 * in softirq context, e.g. either bottom half from interrupt or 1177 * NAPI polling context. 1178 */ 1179 static int 1180 spider_net_decode_one_descr(struct spider_net_card *card) 1181 { 1182 struct net_device *dev = card->netdev; 1183 struct spider_net_descr_chain *chain = &card->rx_chain; 1184 struct spider_net_descr *descr = chain->tail; 1185 struct spider_net_hw_descr *hwdescr = descr->hwdescr; 1186 u32 hw_buf_addr; 1187 int status; 1188 1189 status = spider_net_get_descr_status(hwdescr); 1190 1191 /* Nothing in the descriptor, or ring must be empty */ 1192 if ((status == SPIDER_NET_DESCR_CARDOWNED) || 1193 (status == SPIDER_NET_DESCR_NOT_IN_USE)) 1194 return 0; 1195 1196 /* descriptor definitively used -- move on tail */ 1197 chain->tail = descr->next; 1198 1199 /* unmap descriptor */ 1200 hw_buf_addr = hwdescr->buf_addr; 1201 hwdescr->buf_addr = 0xffffffff; 1202 pci_unmap_single(card->pdev, hw_buf_addr, 1203 SPIDER_NET_MAX_FRAME, PCI_DMA_FROMDEVICE); 1204 1205 if ( (status == SPIDER_NET_DESCR_RESPONSE_ERROR) || 1206 (status == SPIDER_NET_DESCR_PROTECTION_ERROR) || 1207 (status == SPIDER_NET_DESCR_FORCE_END) ) { 1208 if (netif_msg_rx_err(card)) 1209 dev_err(&dev->dev, 1210 "dropping RX descriptor with state %d\n", status); 1211 dev->stats.rx_dropped++; 1212 goto bad_desc; 1213 } 1214 1215 if ( (status != SPIDER_NET_DESCR_COMPLETE) && 1216 (status != SPIDER_NET_DESCR_FRAME_END) ) { 1217 if (netif_msg_rx_err(card)) 1218 dev_err(&card->netdev->dev, 1219 "RX descriptor with unknown state %d\n", status); 1220 card->spider_stats.rx_desc_unk_state++; 1221 goto bad_desc; 1222 } 1223 1224 /* The cases we'll throw away the packet immediately */ 1225 if (hwdescr->data_error & SPIDER_NET_DESTROY_RX_FLAGS) { 1226 if (netif_msg_rx_err(card)) 1227 dev_err(&card->netdev->dev, 1228 "error in received descriptor found, " 1229 "data_status=x%08x, data_error=x%08x\n", 1230 hwdescr->data_status, hwdescr->data_error); 1231 goto bad_desc; 1232 } 1233 1234 if (hwdescr->dmac_cmd_status & SPIDER_NET_DESCR_BAD_STATUS) { 1235 dev_err(&card->netdev->dev, "bad status, cmd_status=x%08x\n", 1236 hwdescr->dmac_cmd_status); 1237 pr_err("buf_addr=x%08x\n", hw_buf_addr); 1238 pr_err("buf_size=x%08x\n", hwdescr->buf_size); 1239 pr_err("next_descr_addr=x%08x\n", hwdescr->next_descr_addr); 1240 pr_err("result_size=x%08x\n", hwdescr->result_size); 1241 pr_err("valid_size=x%08x\n", hwdescr->valid_size); 1242 pr_err("data_status=x%08x\n", hwdescr->data_status); 1243 pr_err("data_error=x%08x\n", hwdescr->data_error); 1244 pr_err("which=%ld\n", descr - card->rx_chain.ring); 1245 1246 card->spider_stats.rx_desc_error++; 1247 goto bad_desc; 1248 } 1249 1250 /* Ok, we've got a packet in descr */ 1251 spider_net_pass_skb_up(descr, card); 1252 descr->skb = NULL; 1253 hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE; 1254 return 1; 1255 1256 bad_desc: 1257 if (netif_msg_rx_err(card)) 1258 show_rx_chain(card); 1259 dev_kfree_skb_irq(descr->skb); 1260 descr->skb = NULL; 1261 hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE; 1262 return 0; 1263 } 1264 1265 /** 1266 * spider_net_poll - NAPI poll function called by the stack to return packets 1267 * @netdev: interface device structure 1268 * @budget: number of packets we can pass to the stack at most 1269 * 1270 * returns 0 if no more packets available to the driver/stack. Returns 1, 1271 * if the quota is exceeded, but the driver has still packets. 1272 * 1273 * spider_net_poll returns all packets from the rx descriptors to the stack 1274 * (using netif_receive_skb). If all/enough packets are up, the driver 1275 * reenables interrupts and returns 0. If not, 1 is returned. 1276 */ 1277 static int spider_net_poll(struct napi_struct *napi, int budget) 1278 { 1279 struct spider_net_card *card = container_of(napi, struct spider_net_card, napi); 1280 int packets_done = 0; 1281 1282 while (packets_done < budget) { 1283 if (!spider_net_decode_one_descr(card)) 1284 break; 1285 1286 packets_done++; 1287 } 1288 1289 if ((packets_done == 0) && (card->num_rx_ints != 0)) { 1290 if (!spider_net_resync_tail_ptr(card)) 1291 packets_done = budget; 1292 spider_net_resync_head_ptr(card); 1293 } 1294 card->num_rx_ints = 0; 1295 1296 spider_net_refill_rx_chain(card); 1297 spider_net_enable_rxdmac(card); 1298 1299 spider_net_cleanup_tx_ring(card); 1300 1301 /* if all packets are in the stack, enable interrupts and return 0 */ 1302 /* if not, return 1 */ 1303 if (packets_done < budget) { 1304 napi_complete(napi); 1305 spider_net_rx_irq_on(card); 1306 card->ignore_rx_ramfull = 0; 1307 } 1308 1309 return packets_done; 1310 } 1311 1312 /** 1313 * spider_net_change_mtu - changes the MTU of an interface 1314 * @netdev: interface device structure 1315 * @new_mtu: new MTU value 1316 * 1317 * returns 0 on success, <0 on failure 1318 */ 1319 static int 1320 spider_net_change_mtu(struct net_device *netdev, int new_mtu) 1321 { 1322 /* no need to re-alloc skbs or so -- the max mtu is about 2.3k 1323 * and mtu is outbound only anyway */ 1324 if ( (new_mtu < SPIDER_NET_MIN_MTU ) || 1325 (new_mtu > SPIDER_NET_MAX_MTU) ) 1326 return -EINVAL; 1327 netdev->mtu = new_mtu; 1328 return 0; 1329 } 1330 1331 /** 1332 * spider_net_set_mac - sets the MAC of an interface 1333 * @netdev: interface device structure 1334 * @ptr: pointer to new MAC address 1335 * 1336 * Returns 0 on success, <0 on failure. Currently, we don't support this 1337 * and will always return EOPNOTSUPP. 1338 */ 1339 static int 1340 spider_net_set_mac(struct net_device *netdev, void *p) 1341 { 1342 struct spider_net_card *card = netdev_priv(netdev); 1343 u32 macl, macu, regvalue; 1344 struct sockaddr *addr = p; 1345 1346 if (!is_valid_ether_addr(addr->sa_data)) 1347 return -EADDRNOTAVAIL; 1348 1349 /* switch off GMACTPE and GMACRPE */ 1350 regvalue = spider_net_read_reg(card, SPIDER_NET_GMACOPEMD); 1351 regvalue &= ~((1 << 5) | (1 << 6)); 1352 spider_net_write_reg(card, SPIDER_NET_GMACOPEMD, regvalue); 1353 1354 /* write mac */ 1355 macu = (addr->sa_data[0]<<24) + (addr->sa_data[1]<<16) + 1356 (addr->sa_data[2]<<8) + (addr->sa_data[3]); 1357 macl = (addr->sa_data[4]<<8) + (addr->sa_data[5]); 1358 spider_net_write_reg(card, SPIDER_NET_GMACUNIMACU, macu); 1359 spider_net_write_reg(card, SPIDER_NET_GMACUNIMACL, macl); 1360 1361 /* switch GMACTPE and GMACRPE back on */ 1362 regvalue = spider_net_read_reg(card, SPIDER_NET_GMACOPEMD); 1363 regvalue |= ((1 << 5) | (1 << 6)); 1364 spider_net_write_reg(card, SPIDER_NET_GMACOPEMD, regvalue); 1365 1366 spider_net_set_promisc(card); 1367 1368 /* look up, whether we have been successful */ 1369 if (spider_net_get_mac_address(netdev)) 1370 return -EADDRNOTAVAIL; 1371 if (memcmp(netdev->dev_addr,addr->sa_data,netdev->addr_len)) 1372 return -EADDRNOTAVAIL; 1373 1374 return 0; 1375 } 1376 1377 /** 1378 * spider_net_link_reset 1379 * @netdev: net device structure 1380 * 1381 * This is called when the PHY_LINK signal is asserted. For the blade this is 1382 * not connected so we should never get here. 1383 * 1384 */ 1385 static void 1386 spider_net_link_reset(struct net_device *netdev) 1387 { 1388 1389 struct spider_net_card *card = netdev_priv(netdev); 1390 1391 del_timer_sync(&card->aneg_timer); 1392 1393 /* clear interrupt, block further interrupts */ 1394 spider_net_write_reg(card, SPIDER_NET_GMACST, 1395 spider_net_read_reg(card, SPIDER_NET_GMACST)); 1396 spider_net_write_reg(card, SPIDER_NET_GMACINTEN, 0); 1397 1398 /* reset phy and setup aneg */ 1399 card->aneg_count = 0; 1400 card->medium = BCM54XX_COPPER; 1401 spider_net_setup_aneg(card); 1402 mod_timer(&card->aneg_timer, jiffies + SPIDER_NET_ANEG_TIMER); 1403 1404 } 1405 1406 /** 1407 * spider_net_handle_error_irq - handles errors raised by an interrupt 1408 * @card: card structure 1409 * @status_reg: interrupt status register 0 (GHIINT0STS) 1410 * 1411 * spider_net_handle_error_irq treats or ignores all error conditions 1412 * found when an interrupt is presented 1413 */ 1414 static void 1415 spider_net_handle_error_irq(struct spider_net_card *card, u32 status_reg, 1416 u32 error_reg1, u32 error_reg2) 1417 { 1418 u32 i; 1419 int show_error = 1; 1420 1421 /* check GHIINT0STS ************************************/ 1422 if (status_reg) 1423 for (i = 0; i < 32; i++) 1424 if (status_reg & (1<<i)) 1425 switch (i) 1426 { 1427 /* let error_reg1 and error_reg2 evaluation decide, what to do 1428 case SPIDER_NET_PHYINT: 1429 case SPIDER_NET_GMAC2INT: 1430 case SPIDER_NET_GMAC1INT: 1431 case SPIDER_NET_GFIFOINT: 1432 case SPIDER_NET_DMACINT: 1433 case SPIDER_NET_GSYSINT: 1434 break; */ 1435 1436 case SPIDER_NET_GIPSINT: 1437 show_error = 0; 1438 break; 1439 1440 case SPIDER_NET_GPWOPCMPINT: 1441 /* PHY write operation completed */ 1442 show_error = 0; 1443 break; 1444 case SPIDER_NET_GPROPCMPINT: 1445 /* PHY read operation completed */ 1446 /* we don't use semaphores, as we poll for the completion 1447 * of the read operation in spider_net_read_phy. Should take 1448 * about 50 us */ 1449 show_error = 0; 1450 break; 1451 case SPIDER_NET_GPWFFINT: 1452 /* PHY command queue full */ 1453 if (netif_msg_intr(card)) 1454 dev_err(&card->netdev->dev, "PHY write queue full\n"); 1455 show_error = 0; 1456 break; 1457 1458 /* case SPIDER_NET_GRMDADRINT: not used. print a message */ 1459 /* case SPIDER_NET_GRMARPINT: not used. print a message */ 1460 /* case SPIDER_NET_GRMMPINT: not used. print a message */ 1461 1462 case SPIDER_NET_GDTDEN0INT: 1463 /* someone has set TX_DMA_EN to 0 */ 1464 show_error = 0; 1465 break; 1466 1467 case SPIDER_NET_GDDDEN0INT: /* fallthrough */ 1468 case SPIDER_NET_GDCDEN0INT: /* fallthrough */ 1469 case SPIDER_NET_GDBDEN0INT: /* fallthrough */ 1470 case SPIDER_NET_GDADEN0INT: 1471 /* someone has set RX_DMA_EN to 0 */ 1472 show_error = 0; 1473 break; 1474 1475 /* RX interrupts */ 1476 case SPIDER_NET_GDDFDCINT: 1477 case SPIDER_NET_GDCFDCINT: 1478 case SPIDER_NET_GDBFDCINT: 1479 case SPIDER_NET_GDAFDCINT: 1480 /* case SPIDER_NET_GDNMINT: not used. print a message */ 1481 /* case SPIDER_NET_GCNMINT: not used. print a message */ 1482 /* case SPIDER_NET_GBNMINT: not used. print a message */ 1483 /* case SPIDER_NET_GANMINT: not used. print a message */ 1484 /* case SPIDER_NET_GRFNMINT: not used. print a message */ 1485 show_error = 0; 1486 break; 1487 1488 /* TX interrupts */ 1489 case SPIDER_NET_GDTFDCINT: 1490 show_error = 0; 1491 break; 1492 case SPIDER_NET_GTTEDINT: 1493 show_error = 0; 1494 break; 1495 case SPIDER_NET_GDTDCEINT: 1496 /* chain end. If a descriptor should be sent, kick off 1497 * tx dma 1498 if (card->tx_chain.tail != card->tx_chain.head) 1499 spider_net_kick_tx_dma(card); 1500 */ 1501 show_error = 0; 1502 break; 1503 1504 /* case SPIDER_NET_G1TMCNTINT: not used. print a message */ 1505 /* case SPIDER_NET_GFREECNTINT: not used. print a message */ 1506 } 1507 1508 /* check GHIINT1STS ************************************/ 1509 if (error_reg1) 1510 for (i = 0; i < 32; i++) 1511 if (error_reg1 & (1<<i)) 1512 switch (i) 1513 { 1514 case SPIDER_NET_GTMFLLINT: 1515 /* TX RAM full may happen on a usual case. 1516 * Logging is not needed. */ 1517 show_error = 0; 1518 break; 1519 case SPIDER_NET_GRFDFLLINT: /* fallthrough */ 1520 case SPIDER_NET_GRFCFLLINT: /* fallthrough */ 1521 case SPIDER_NET_GRFBFLLINT: /* fallthrough */ 1522 case SPIDER_NET_GRFAFLLINT: /* fallthrough */ 1523 case SPIDER_NET_GRMFLLINT: 1524 /* Could happen when rx chain is full */ 1525 if (card->ignore_rx_ramfull == 0) { 1526 card->ignore_rx_ramfull = 1; 1527 spider_net_resync_head_ptr(card); 1528 spider_net_refill_rx_chain(card); 1529 spider_net_enable_rxdmac(card); 1530 card->num_rx_ints ++; 1531 napi_schedule(&card->napi); 1532 } 1533 show_error = 0; 1534 break; 1535 1536 /* case SPIDER_NET_GTMSHTINT: problem, print a message */ 1537 case SPIDER_NET_GDTINVDINT: 1538 /* allrighty. tx from previous descr ok */ 1539 show_error = 0; 1540 break; 1541 1542 /* chain end */ 1543 case SPIDER_NET_GDDDCEINT: /* fallthrough */ 1544 case SPIDER_NET_GDCDCEINT: /* fallthrough */ 1545 case SPIDER_NET_GDBDCEINT: /* fallthrough */ 1546 case SPIDER_NET_GDADCEINT: 1547 spider_net_resync_head_ptr(card); 1548 spider_net_refill_rx_chain(card); 1549 spider_net_enable_rxdmac(card); 1550 card->num_rx_ints ++; 1551 napi_schedule(&card->napi); 1552 show_error = 0; 1553 break; 1554 1555 /* invalid descriptor */ 1556 case SPIDER_NET_GDDINVDINT: /* fallthrough */ 1557 case SPIDER_NET_GDCINVDINT: /* fallthrough */ 1558 case SPIDER_NET_GDBINVDINT: /* fallthrough */ 1559 case SPIDER_NET_GDAINVDINT: 1560 /* Could happen when rx chain is full */ 1561 spider_net_resync_head_ptr(card); 1562 spider_net_refill_rx_chain(card); 1563 spider_net_enable_rxdmac(card); 1564 card->num_rx_ints ++; 1565 napi_schedule(&card->napi); 1566 show_error = 0; 1567 break; 1568 1569 /* case SPIDER_NET_GDTRSERINT: problem, print a message */ 1570 /* case SPIDER_NET_GDDRSERINT: problem, print a message */ 1571 /* case SPIDER_NET_GDCRSERINT: problem, print a message */ 1572 /* case SPIDER_NET_GDBRSERINT: problem, print a message */ 1573 /* case SPIDER_NET_GDARSERINT: problem, print a message */ 1574 /* case SPIDER_NET_GDSERINT: problem, print a message */ 1575 /* case SPIDER_NET_GDTPTERINT: problem, print a message */ 1576 /* case SPIDER_NET_GDDPTERINT: problem, print a message */ 1577 /* case SPIDER_NET_GDCPTERINT: problem, print a message */ 1578 /* case SPIDER_NET_GDBPTERINT: problem, print a message */ 1579 /* case SPIDER_NET_GDAPTERINT: problem, print a message */ 1580 default: 1581 show_error = 1; 1582 break; 1583 } 1584 1585 /* check GHIINT2STS ************************************/ 1586 if (error_reg2) 1587 for (i = 0; i < 32; i++) 1588 if (error_reg2 & (1<<i)) 1589 switch (i) 1590 { 1591 /* there is nothing we can (want to) do at this time. Log a 1592 * message, we can switch on and off the specific values later on 1593 case SPIDER_NET_GPROPERINT: 1594 case SPIDER_NET_GMCTCRSNGINT: 1595 case SPIDER_NET_GMCTLCOLINT: 1596 case SPIDER_NET_GMCTTMOTINT: 1597 case SPIDER_NET_GMCRCAERINT: 1598 case SPIDER_NET_GMCRCALERINT: 1599 case SPIDER_NET_GMCRALNERINT: 1600 case SPIDER_NET_GMCROVRINT: 1601 case SPIDER_NET_GMCRRNTINT: 1602 case SPIDER_NET_GMCRRXERINT: 1603 case SPIDER_NET_GTITCSERINT: 1604 case SPIDER_NET_GTIFMTERINT: 1605 case SPIDER_NET_GTIPKTRVKINT: 1606 case SPIDER_NET_GTISPINGINT: 1607 case SPIDER_NET_GTISADNGINT: 1608 case SPIDER_NET_GTISPDNGINT: 1609 case SPIDER_NET_GRIFMTERINT: 1610 case SPIDER_NET_GRIPKTRVKINT: 1611 case SPIDER_NET_GRISPINGINT: 1612 case SPIDER_NET_GRISADNGINT: 1613 case SPIDER_NET_GRISPDNGINT: 1614 break; 1615 */ 1616 default: 1617 break; 1618 } 1619 1620 if ((show_error) && (netif_msg_intr(card)) && net_ratelimit()) 1621 dev_err(&card->netdev->dev, "Error interrupt, GHIINT0STS = 0x%08x, " 1622 "GHIINT1STS = 0x%08x, GHIINT2STS = 0x%08x\n", 1623 status_reg, error_reg1, error_reg2); 1624 1625 /* clear interrupt sources */ 1626 spider_net_write_reg(card, SPIDER_NET_GHIINT1STS, error_reg1); 1627 spider_net_write_reg(card, SPIDER_NET_GHIINT2STS, error_reg2); 1628 } 1629 1630 /** 1631 * spider_net_interrupt - interrupt handler for spider_net 1632 * @irq: interrupt number 1633 * @ptr: pointer to net_device 1634 * 1635 * returns IRQ_HANDLED, if interrupt was for driver, or IRQ_NONE, if no 1636 * interrupt found raised by card. 1637 * 1638 * This is the interrupt handler, that turns off 1639 * interrupts for this device and makes the stack poll the driver 1640 */ 1641 static irqreturn_t 1642 spider_net_interrupt(int irq, void *ptr) 1643 { 1644 struct net_device *netdev = ptr; 1645 struct spider_net_card *card = netdev_priv(netdev); 1646 u32 status_reg, error_reg1, error_reg2; 1647 1648 status_reg = spider_net_read_reg(card, SPIDER_NET_GHIINT0STS); 1649 error_reg1 = spider_net_read_reg(card, SPIDER_NET_GHIINT1STS); 1650 error_reg2 = spider_net_read_reg(card, SPIDER_NET_GHIINT2STS); 1651 1652 if (!(status_reg & SPIDER_NET_INT0_MASK_VALUE) && 1653 !(error_reg1 & SPIDER_NET_INT1_MASK_VALUE) && 1654 !(error_reg2 & SPIDER_NET_INT2_MASK_VALUE)) 1655 return IRQ_NONE; 1656 1657 if (status_reg & SPIDER_NET_RXINT ) { 1658 spider_net_rx_irq_off(card); 1659 napi_schedule(&card->napi); 1660 card->num_rx_ints ++; 1661 } 1662 if (status_reg & SPIDER_NET_TXINT) 1663 napi_schedule(&card->napi); 1664 1665 if (status_reg & SPIDER_NET_LINKINT) 1666 spider_net_link_reset(netdev); 1667 1668 if (status_reg & SPIDER_NET_ERRINT ) 1669 spider_net_handle_error_irq(card, status_reg, 1670 error_reg1, error_reg2); 1671 1672 /* clear interrupt sources */ 1673 spider_net_write_reg(card, SPIDER_NET_GHIINT0STS, status_reg); 1674 1675 return IRQ_HANDLED; 1676 } 1677 1678 #ifdef CONFIG_NET_POLL_CONTROLLER 1679 /** 1680 * spider_net_poll_controller - artificial interrupt for netconsole etc. 1681 * @netdev: interface device structure 1682 * 1683 * see Documentation/networking/netconsole.txt 1684 */ 1685 static void 1686 spider_net_poll_controller(struct net_device *netdev) 1687 { 1688 disable_irq(netdev->irq); 1689 spider_net_interrupt(netdev->irq, netdev); 1690 enable_irq(netdev->irq); 1691 } 1692 #endif /* CONFIG_NET_POLL_CONTROLLER */ 1693 1694 /** 1695 * spider_net_enable_interrupts - enable interrupts 1696 * @card: card structure 1697 * 1698 * spider_net_enable_interrupt enables several interrupts 1699 */ 1700 static void 1701 spider_net_enable_interrupts(struct spider_net_card *card) 1702 { 1703 spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, 1704 SPIDER_NET_INT0_MASK_VALUE); 1705 spider_net_write_reg(card, SPIDER_NET_GHIINT1MSK, 1706 SPIDER_NET_INT1_MASK_VALUE); 1707 spider_net_write_reg(card, SPIDER_NET_GHIINT2MSK, 1708 SPIDER_NET_INT2_MASK_VALUE); 1709 } 1710 1711 /** 1712 * spider_net_disable_interrupts - disable interrupts 1713 * @card: card structure 1714 * 1715 * spider_net_disable_interrupts disables all the interrupts 1716 */ 1717 static void 1718 spider_net_disable_interrupts(struct spider_net_card *card) 1719 { 1720 spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, 0); 1721 spider_net_write_reg(card, SPIDER_NET_GHIINT1MSK, 0); 1722 spider_net_write_reg(card, SPIDER_NET_GHIINT2MSK, 0); 1723 spider_net_write_reg(card, SPIDER_NET_GMACINTEN, 0); 1724 } 1725 1726 /** 1727 * spider_net_init_card - initializes the card 1728 * @card: card structure 1729 * 1730 * spider_net_init_card initializes the card so that other registers can 1731 * be used 1732 */ 1733 static void 1734 spider_net_init_card(struct spider_net_card *card) 1735 { 1736 spider_net_write_reg(card, SPIDER_NET_CKRCTRL, 1737 SPIDER_NET_CKRCTRL_STOP_VALUE); 1738 1739 spider_net_write_reg(card, SPIDER_NET_CKRCTRL, 1740 SPIDER_NET_CKRCTRL_RUN_VALUE); 1741 1742 /* trigger ETOMOD signal */ 1743 spider_net_write_reg(card, SPIDER_NET_GMACOPEMD, 1744 spider_net_read_reg(card, SPIDER_NET_GMACOPEMD) | 0x4); 1745 1746 spider_net_disable_interrupts(card); 1747 } 1748 1749 /** 1750 * spider_net_enable_card - enables the card by setting all kinds of regs 1751 * @card: card structure 1752 * 1753 * spider_net_enable_card sets a lot of SMMIO registers to enable the device 1754 */ 1755 static void 1756 spider_net_enable_card(struct spider_net_card *card) 1757 { 1758 int i; 1759 /* the following array consists of (register),(value) pairs 1760 * that are set in this function. A register of 0 ends the list */ 1761 u32 regs[][2] = { 1762 { SPIDER_NET_GRESUMINTNUM, 0 }, 1763 { SPIDER_NET_GREINTNUM, 0 }, 1764 1765 /* set interrupt frame number registers */ 1766 /* clear the single DMA engine registers first */ 1767 { SPIDER_NET_GFAFRMNUM, SPIDER_NET_GFXFRAMES_VALUE }, 1768 { SPIDER_NET_GFBFRMNUM, SPIDER_NET_GFXFRAMES_VALUE }, 1769 { SPIDER_NET_GFCFRMNUM, SPIDER_NET_GFXFRAMES_VALUE }, 1770 { SPIDER_NET_GFDFRMNUM, SPIDER_NET_GFXFRAMES_VALUE }, 1771 /* then set, what we really need */ 1772 { SPIDER_NET_GFFRMNUM, SPIDER_NET_FRAMENUM_VALUE }, 1773 1774 /* timer counter registers and stuff */ 1775 { SPIDER_NET_GFREECNNUM, 0 }, 1776 { SPIDER_NET_GONETIMENUM, 0 }, 1777 { SPIDER_NET_GTOUTFRMNUM, 0 }, 1778 1779 /* RX mode setting */ 1780 { SPIDER_NET_GRXMDSET, SPIDER_NET_RXMODE_VALUE }, 1781 /* TX mode setting */ 1782 { SPIDER_NET_GTXMDSET, SPIDER_NET_TXMODE_VALUE }, 1783 /* IPSEC mode setting */ 1784 { SPIDER_NET_GIPSECINIT, SPIDER_NET_IPSECINIT_VALUE }, 1785 1786 { SPIDER_NET_GFTRESTRT, SPIDER_NET_RESTART_VALUE }, 1787 1788 { SPIDER_NET_GMRWOLCTRL, 0 }, 1789 { SPIDER_NET_GTESTMD, 0x10000000 }, 1790 { SPIDER_NET_GTTQMSK, 0x00400040 }, 1791 1792 { SPIDER_NET_GMACINTEN, 0 }, 1793 1794 /* flow control stuff */ 1795 { SPIDER_NET_GMACAPAUSE, SPIDER_NET_MACAPAUSE_VALUE }, 1796 { SPIDER_NET_GMACTXPAUSE, SPIDER_NET_TXPAUSE_VALUE }, 1797 1798 { SPIDER_NET_GMACBSTLMT, SPIDER_NET_BURSTLMT_VALUE }, 1799 { 0, 0} 1800 }; 1801 1802 i = 0; 1803 while (regs[i][0]) { 1804 spider_net_write_reg(card, regs[i][0], regs[i][1]); 1805 i++; 1806 } 1807 1808 /* clear unicast filter table entries 1 to 14 */ 1809 for (i = 1; i <= 14; i++) { 1810 spider_net_write_reg(card, 1811 SPIDER_NET_GMRUAFILnR + i * 8, 1812 0x00080000); 1813 spider_net_write_reg(card, 1814 SPIDER_NET_GMRUAFILnR + i * 8 + 4, 1815 0x00000000); 1816 } 1817 1818 spider_net_write_reg(card, SPIDER_NET_GMRUA0FIL15R, 0x08080000); 1819 1820 spider_net_write_reg(card, SPIDER_NET_ECMODE, SPIDER_NET_ECMODE_VALUE); 1821 1822 /* set chain tail address for RX chains and 1823 * enable DMA */ 1824 spider_net_enable_rxchtails(card); 1825 spider_net_enable_rxdmac(card); 1826 1827 spider_net_write_reg(card, SPIDER_NET_GRXDMAEN, SPIDER_NET_WOL_VALUE); 1828 1829 spider_net_write_reg(card, SPIDER_NET_GMACLENLMT, 1830 SPIDER_NET_LENLMT_VALUE); 1831 spider_net_write_reg(card, SPIDER_NET_GMACOPEMD, 1832 SPIDER_NET_OPMODE_VALUE); 1833 1834 spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR, 1835 SPIDER_NET_GDTBSTA); 1836 } 1837 1838 /** 1839 * spider_net_download_firmware - loads firmware into the adapter 1840 * @card: card structure 1841 * @firmware_ptr: pointer to firmware data 1842 * 1843 * spider_net_download_firmware loads the firmware data into the 1844 * adapter. It assumes the length etc. to be allright. 1845 */ 1846 static int 1847 spider_net_download_firmware(struct spider_net_card *card, 1848 const void *firmware_ptr) 1849 { 1850 int sequencer, i; 1851 const u32 *fw_ptr = firmware_ptr; 1852 1853 /* stop sequencers */ 1854 spider_net_write_reg(card, SPIDER_NET_GSINIT, 1855 SPIDER_NET_STOP_SEQ_VALUE); 1856 1857 for (sequencer = 0; sequencer < SPIDER_NET_FIRMWARE_SEQS; 1858 sequencer++) { 1859 spider_net_write_reg(card, 1860 SPIDER_NET_GSnPRGADR + sequencer * 8, 0); 1861 for (i = 0; i < SPIDER_NET_FIRMWARE_SEQWORDS; i++) { 1862 spider_net_write_reg(card, SPIDER_NET_GSnPRGDAT + 1863 sequencer * 8, *fw_ptr); 1864 fw_ptr++; 1865 } 1866 } 1867 1868 if (spider_net_read_reg(card, SPIDER_NET_GSINIT)) 1869 return -EIO; 1870 1871 spider_net_write_reg(card, SPIDER_NET_GSINIT, 1872 SPIDER_NET_RUN_SEQ_VALUE); 1873 1874 return 0; 1875 } 1876 1877 /** 1878 * spider_net_init_firmware - reads in firmware parts 1879 * @card: card structure 1880 * 1881 * Returns 0 on success, <0 on failure 1882 * 1883 * spider_net_init_firmware opens the sequencer firmware and does some basic 1884 * checks. This function opens and releases the firmware structure. A call 1885 * to download the firmware is performed before the release. 1886 * 1887 * Firmware format 1888 * =============== 1889 * spider_fw.bin is expected to be a file containing 6*1024*4 bytes, 4k being 1890 * the program for each sequencer. Use the command 1891 * tail -q -n +2 Seq_code1_0x088.txt Seq_code2_0x090.txt \ 1892 * Seq_code3_0x098.txt Seq_code4_0x0A0.txt Seq_code5_0x0A8.txt \ 1893 * Seq_code6_0x0B0.txt | xxd -r -p -c4 > spider_fw.bin 1894 * 1895 * to generate spider_fw.bin, if you have sequencer programs with something 1896 * like the following contents for each sequencer: 1897 * <ONE LINE COMMENT> 1898 * <FIRST 4-BYTES-WORD FOR SEQUENCER> 1899 * <SECOND 4-BYTES-WORD FOR SEQUENCER> 1900 * ... 1901 * <1024th 4-BYTES-WORD FOR SEQUENCER> 1902 */ 1903 static int 1904 spider_net_init_firmware(struct spider_net_card *card) 1905 { 1906 struct firmware *firmware = NULL; 1907 struct device_node *dn; 1908 const u8 *fw_prop = NULL; 1909 int err = -ENOENT; 1910 int fw_size; 1911 1912 if (request_firmware((const struct firmware **)&firmware, 1913 SPIDER_NET_FIRMWARE_NAME, &card->pdev->dev) == 0) { 1914 if ( (firmware->size != SPIDER_NET_FIRMWARE_LEN) && 1915 netif_msg_probe(card) ) { 1916 dev_err(&card->netdev->dev, 1917 "Incorrect size of spidernet firmware in " \ 1918 "filesystem. Looking in host firmware...\n"); 1919 goto try_host_fw; 1920 } 1921 err = spider_net_download_firmware(card, firmware->data); 1922 1923 release_firmware(firmware); 1924 if (err) 1925 goto try_host_fw; 1926 1927 goto done; 1928 } 1929 1930 try_host_fw: 1931 dn = pci_device_to_OF_node(card->pdev); 1932 if (!dn) 1933 goto out_err; 1934 1935 fw_prop = of_get_property(dn, "firmware", &fw_size); 1936 if (!fw_prop) 1937 goto out_err; 1938 1939 if ( (fw_size != SPIDER_NET_FIRMWARE_LEN) && 1940 netif_msg_probe(card) ) { 1941 dev_err(&card->netdev->dev, 1942 "Incorrect size of spidernet firmware in host firmware\n"); 1943 goto done; 1944 } 1945 1946 err = spider_net_download_firmware(card, fw_prop); 1947 1948 done: 1949 return err; 1950 out_err: 1951 if (netif_msg_probe(card)) 1952 dev_err(&card->netdev->dev, 1953 "Couldn't find spidernet firmware in filesystem " \ 1954 "or host firmware\n"); 1955 return err; 1956 } 1957 1958 /** 1959 * spider_net_open - called upon ifonfig up 1960 * @netdev: interface device structure 1961 * 1962 * returns 0 on success, <0 on failure 1963 * 1964 * spider_net_open allocates all the descriptors and memory needed for 1965 * operation, sets up multicast list and enables interrupts 1966 */ 1967 int 1968 spider_net_open(struct net_device *netdev) 1969 { 1970 struct spider_net_card *card = netdev_priv(netdev); 1971 int result; 1972 1973 result = spider_net_init_firmware(card); 1974 if (result) 1975 goto init_firmware_failed; 1976 1977 /* start probing with copper */ 1978 card->aneg_count = 0; 1979 card->medium = BCM54XX_COPPER; 1980 spider_net_setup_aneg(card); 1981 if (card->phy.def->phy_id) 1982 mod_timer(&card->aneg_timer, jiffies + SPIDER_NET_ANEG_TIMER); 1983 1984 result = spider_net_init_chain(card, &card->tx_chain); 1985 if (result) 1986 goto alloc_tx_failed; 1987 card->low_watermark = NULL; 1988 1989 result = spider_net_init_chain(card, &card->rx_chain); 1990 if (result) 1991 goto alloc_rx_failed; 1992 1993 /* Allocate rx skbs */ 1994 if (spider_net_alloc_rx_skbs(card)) 1995 goto alloc_skbs_failed; 1996 1997 spider_net_set_multi(netdev); 1998 1999 /* further enhancement: setup hw vlan, if needed */ 2000 2001 result = -EBUSY; 2002 if (request_irq(netdev->irq, spider_net_interrupt, 2003 IRQF_SHARED, netdev->name, netdev)) 2004 goto register_int_failed; 2005 2006 spider_net_enable_card(card); 2007 2008 netif_start_queue(netdev); 2009 netif_carrier_on(netdev); 2010 napi_enable(&card->napi); 2011 2012 spider_net_enable_interrupts(card); 2013 2014 return 0; 2015 2016 register_int_failed: 2017 spider_net_free_rx_chain_contents(card); 2018 alloc_skbs_failed: 2019 spider_net_free_chain(card, &card->rx_chain); 2020 alloc_rx_failed: 2021 spider_net_free_chain(card, &card->tx_chain); 2022 alloc_tx_failed: 2023 del_timer_sync(&card->aneg_timer); 2024 init_firmware_failed: 2025 return result; 2026 } 2027 2028 /** 2029 * spider_net_link_phy 2030 * @data: used for pointer to card structure 2031 * 2032 */ 2033 static void spider_net_link_phy(unsigned long data) 2034 { 2035 struct spider_net_card *card = (struct spider_net_card *)data; 2036 struct mii_phy *phy = &card->phy; 2037 2038 /* if link didn't come up after SPIDER_NET_ANEG_TIMEOUT tries, setup phy again */ 2039 if (card->aneg_count > SPIDER_NET_ANEG_TIMEOUT) { 2040 2041 pr_debug("%s: link is down trying to bring it up\n", 2042 card->netdev->name); 2043 2044 switch (card->medium) { 2045 case BCM54XX_COPPER: 2046 /* enable fiber with autonegotiation first */ 2047 if (phy->def->ops->enable_fiber) 2048 phy->def->ops->enable_fiber(phy, 1); 2049 card->medium = BCM54XX_FIBER; 2050 break; 2051 2052 case BCM54XX_FIBER: 2053 /* fiber didn't come up, try to disable fiber autoneg */ 2054 if (phy->def->ops->enable_fiber) 2055 phy->def->ops->enable_fiber(phy, 0); 2056 card->medium = BCM54XX_UNKNOWN; 2057 break; 2058 2059 case BCM54XX_UNKNOWN: 2060 /* copper, fiber with and without failed, 2061 * retry from beginning */ 2062 spider_net_setup_aneg(card); 2063 card->medium = BCM54XX_COPPER; 2064 break; 2065 } 2066 2067 card->aneg_count = 0; 2068 mod_timer(&card->aneg_timer, jiffies + SPIDER_NET_ANEG_TIMER); 2069 return; 2070 } 2071 2072 /* link still not up, try again later */ 2073 if (!(phy->def->ops->poll_link(phy))) { 2074 card->aneg_count++; 2075 mod_timer(&card->aneg_timer, jiffies + SPIDER_NET_ANEG_TIMER); 2076 return; 2077 } 2078 2079 /* link came up, get abilities */ 2080 phy->def->ops->read_link(phy); 2081 2082 spider_net_write_reg(card, SPIDER_NET_GMACST, 2083 spider_net_read_reg(card, SPIDER_NET_GMACST)); 2084 spider_net_write_reg(card, SPIDER_NET_GMACINTEN, 0x4); 2085 2086 if (phy->speed == 1000) 2087 spider_net_write_reg(card, SPIDER_NET_GMACMODE, 0x00000001); 2088 else 2089 spider_net_write_reg(card, SPIDER_NET_GMACMODE, 0); 2090 2091 card->aneg_count = 0; 2092 2093 pr_info("%s: link up, %i Mbps, %s-duplex %sautoneg.\n", 2094 card->netdev->name, phy->speed, 2095 phy->duplex == 1 ? "Full" : "Half", 2096 phy->autoneg == 1 ? "" : "no "); 2097 } 2098 2099 /** 2100 * spider_net_setup_phy - setup PHY 2101 * @card: card structure 2102 * 2103 * returns 0 on success, <0 on failure 2104 * 2105 * spider_net_setup_phy is used as part of spider_net_probe. 2106 **/ 2107 static int 2108 spider_net_setup_phy(struct spider_net_card *card) 2109 { 2110 struct mii_phy *phy = &card->phy; 2111 2112 spider_net_write_reg(card, SPIDER_NET_GDTDMASEL, 2113 SPIDER_NET_DMASEL_VALUE); 2114 spider_net_write_reg(card, SPIDER_NET_GPCCTRL, 2115 SPIDER_NET_PHY_CTRL_VALUE); 2116 2117 phy->dev = card->netdev; 2118 phy->mdio_read = spider_net_read_phy; 2119 phy->mdio_write = spider_net_write_phy; 2120 2121 for (phy->mii_id = 1; phy->mii_id <= 31; phy->mii_id++) { 2122 unsigned short id; 2123 id = spider_net_read_phy(card->netdev, phy->mii_id, MII_BMSR); 2124 if (id != 0x0000 && id != 0xffff) { 2125 if (!sungem_phy_probe(phy, phy->mii_id)) { 2126 pr_info("Found %s.\n", phy->def->name); 2127 break; 2128 } 2129 } 2130 } 2131 2132 return 0; 2133 } 2134 2135 /** 2136 * spider_net_workaround_rxramfull - work around firmware bug 2137 * @card: card structure 2138 * 2139 * no return value 2140 **/ 2141 static void 2142 spider_net_workaround_rxramfull(struct spider_net_card *card) 2143 { 2144 int i, sequencer = 0; 2145 2146 /* cancel reset */ 2147 spider_net_write_reg(card, SPIDER_NET_CKRCTRL, 2148 SPIDER_NET_CKRCTRL_RUN_VALUE); 2149 2150 /* empty sequencer data */ 2151 for (sequencer = 0; sequencer < SPIDER_NET_FIRMWARE_SEQS; 2152 sequencer++) { 2153 spider_net_write_reg(card, SPIDER_NET_GSnPRGADR + 2154 sequencer * 8, 0x0); 2155 for (i = 0; i < SPIDER_NET_FIRMWARE_SEQWORDS; i++) { 2156 spider_net_write_reg(card, SPIDER_NET_GSnPRGDAT + 2157 sequencer * 8, 0x0); 2158 } 2159 } 2160 2161 /* set sequencer operation */ 2162 spider_net_write_reg(card, SPIDER_NET_GSINIT, 0x000000fe); 2163 2164 /* reset */ 2165 spider_net_write_reg(card, SPIDER_NET_CKRCTRL, 2166 SPIDER_NET_CKRCTRL_STOP_VALUE); 2167 } 2168 2169 /** 2170 * spider_net_stop - called upon ifconfig down 2171 * @netdev: interface device structure 2172 * 2173 * always returns 0 2174 */ 2175 int 2176 spider_net_stop(struct net_device *netdev) 2177 { 2178 struct spider_net_card *card = netdev_priv(netdev); 2179 2180 napi_disable(&card->napi); 2181 netif_carrier_off(netdev); 2182 netif_stop_queue(netdev); 2183 del_timer_sync(&card->tx_timer); 2184 del_timer_sync(&card->aneg_timer); 2185 2186 spider_net_disable_interrupts(card); 2187 2188 free_irq(netdev->irq, netdev); 2189 2190 spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR, 2191 SPIDER_NET_DMA_TX_FEND_VALUE); 2192 2193 /* turn off DMA, force end */ 2194 spider_net_disable_rxdmac(card); 2195 2196 /* release chains */ 2197 spider_net_release_tx_chain(card, 1); 2198 spider_net_free_rx_chain_contents(card); 2199 2200 spider_net_free_chain(card, &card->tx_chain); 2201 spider_net_free_chain(card, &card->rx_chain); 2202 2203 return 0; 2204 } 2205 2206 /** 2207 * spider_net_tx_timeout_task - task scheduled by the watchdog timeout 2208 * function (to be called not under interrupt status) 2209 * @data: data, is interface device structure 2210 * 2211 * called as task when tx hangs, resets interface (if interface is up) 2212 */ 2213 static void 2214 spider_net_tx_timeout_task(struct work_struct *work) 2215 { 2216 struct spider_net_card *card = 2217 container_of(work, struct spider_net_card, tx_timeout_task); 2218 struct net_device *netdev = card->netdev; 2219 2220 if (!(netdev->flags & IFF_UP)) 2221 goto out; 2222 2223 netif_device_detach(netdev); 2224 spider_net_stop(netdev); 2225 2226 spider_net_workaround_rxramfull(card); 2227 spider_net_init_card(card); 2228 2229 if (spider_net_setup_phy(card)) 2230 goto out; 2231 2232 spider_net_open(netdev); 2233 spider_net_kick_tx_dma(card); 2234 netif_device_attach(netdev); 2235 2236 out: 2237 atomic_dec(&card->tx_timeout_task_counter); 2238 } 2239 2240 /** 2241 * spider_net_tx_timeout - called when the tx timeout watchdog kicks in. 2242 * @netdev: interface device structure 2243 * 2244 * called, if tx hangs. Schedules a task that resets the interface 2245 */ 2246 static void 2247 spider_net_tx_timeout(struct net_device *netdev) 2248 { 2249 struct spider_net_card *card; 2250 2251 card = netdev_priv(netdev); 2252 atomic_inc(&card->tx_timeout_task_counter); 2253 if (netdev->flags & IFF_UP) 2254 schedule_work(&card->tx_timeout_task); 2255 else 2256 atomic_dec(&card->tx_timeout_task_counter); 2257 card->spider_stats.tx_timeouts++; 2258 } 2259 2260 static const struct net_device_ops spider_net_ops = { 2261 .ndo_open = spider_net_open, 2262 .ndo_stop = spider_net_stop, 2263 .ndo_start_xmit = spider_net_xmit, 2264 .ndo_set_rx_mode = spider_net_set_multi, 2265 .ndo_set_mac_address = spider_net_set_mac, 2266 .ndo_change_mtu = spider_net_change_mtu, 2267 .ndo_do_ioctl = spider_net_do_ioctl, 2268 .ndo_tx_timeout = spider_net_tx_timeout, 2269 .ndo_validate_addr = eth_validate_addr, 2270 /* HW VLAN */ 2271 #ifdef CONFIG_NET_POLL_CONTROLLER 2272 /* poll controller */ 2273 .ndo_poll_controller = spider_net_poll_controller, 2274 #endif /* CONFIG_NET_POLL_CONTROLLER */ 2275 }; 2276 2277 /** 2278 * spider_net_setup_netdev_ops - initialization of net_device operations 2279 * @netdev: net_device structure 2280 * 2281 * fills out function pointers in the net_device structure 2282 */ 2283 static void 2284 spider_net_setup_netdev_ops(struct net_device *netdev) 2285 { 2286 netdev->netdev_ops = &spider_net_ops; 2287 netdev->watchdog_timeo = SPIDER_NET_WATCHDOG_TIMEOUT; 2288 /* ethtool ops */ 2289 netdev->ethtool_ops = &spider_net_ethtool_ops; 2290 } 2291 2292 /** 2293 * spider_net_setup_netdev - initialization of net_device 2294 * @card: card structure 2295 * 2296 * Returns 0 on success or <0 on failure 2297 * 2298 * spider_net_setup_netdev initializes the net_device structure 2299 **/ 2300 static int 2301 spider_net_setup_netdev(struct spider_net_card *card) 2302 { 2303 int result; 2304 struct net_device *netdev = card->netdev; 2305 struct device_node *dn; 2306 struct sockaddr addr; 2307 const u8 *mac; 2308 2309 SET_NETDEV_DEV(netdev, &card->pdev->dev); 2310 2311 pci_set_drvdata(card->pdev, netdev); 2312 2313 init_timer(&card->tx_timer); 2314 card->tx_timer.function = 2315 (void (*)(unsigned long)) spider_net_cleanup_tx_ring; 2316 card->tx_timer.data = (unsigned long) card; 2317 netdev->irq = card->pdev->irq; 2318 2319 card->aneg_count = 0; 2320 init_timer(&card->aneg_timer); 2321 card->aneg_timer.function = spider_net_link_phy; 2322 card->aneg_timer.data = (unsigned long) card; 2323 2324 netif_napi_add(netdev, &card->napi, 2325 spider_net_poll, SPIDER_NET_NAPI_WEIGHT); 2326 2327 spider_net_setup_netdev_ops(netdev); 2328 2329 netdev->hw_features = NETIF_F_RXCSUM | NETIF_F_IP_CSUM; 2330 if (SPIDER_NET_RX_CSUM_DEFAULT) 2331 netdev->features |= NETIF_F_RXCSUM; 2332 netdev->features |= NETIF_F_IP_CSUM | NETIF_F_LLTX; 2333 /* some time: NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX | 2334 * NETIF_F_HW_VLAN_FILTER */ 2335 2336 netdev->irq = card->pdev->irq; 2337 card->num_rx_ints = 0; 2338 card->ignore_rx_ramfull = 0; 2339 2340 dn = pci_device_to_OF_node(card->pdev); 2341 if (!dn) 2342 return -EIO; 2343 2344 mac = of_get_property(dn, "local-mac-address", NULL); 2345 if (!mac) 2346 return -EIO; 2347 memcpy(addr.sa_data, mac, ETH_ALEN); 2348 2349 result = spider_net_set_mac(netdev, &addr); 2350 if ((result) && (netif_msg_probe(card))) 2351 dev_err(&card->netdev->dev, 2352 "Failed to set MAC address: %i\n", result); 2353 2354 result = register_netdev(netdev); 2355 if (result) { 2356 if (netif_msg_probe(card)) 2357 dev_err(&card->netdev->dev, 2358 "Couldn't register net_device: %i\n", result); 2359 return result; 2360 } 2361 2362 if (netif_msg_probe(card)) 2363 pr_info("Initialized device %s.\n", netdev->name); 2364 2365 return 0; 2366 } 2367 2368 /** 2369 * spider_net_alloc_card - allocates net_device and card structure 2370 * 2371 * returns the card structure or NULL in case of errors 2372 * 2373 * the card and net_device structures are linked to each other 2374 */ 2375 static struct spider_net_card * 2376 spider_net_alloc_card(void) 2377 { 2378 struct net_device *netdev; 2379 struct spider_net_card *card; 2380 size_t alloc_size; 2381 2382 alloc_size = sizeof(struct spider_net_card) + 2383 (tx_descriptors + rx_descriptors) * sizeof(struct spider_net_descr); 2384 netdev = alloc_etherdev(alloc_size); 2385 if (!netdev) 2386 return NULL; 2387 2388 card = netdev_priv(netdev); 2389 card->netdev = netdev; 2390 card->msg_enable = SPIDER_NET_DEFAULT_MSG; 2391 INIT_WORK(&card->tx_timeout_task, spider_net_tx_timeout_task); 2392 init_waitqueue_head(&card->waitq); 2393 atomic_set(&card->tx_timeout_task_counter, 0); 2394 2395 card->rx_chain.num_desc = rx_descriptors; 2396 card->rx_chain.ring = card->darray; 2397 card->tx_chain.num_desc = tx_descriptors; 2398 card->tx_chain.ring = card->darray + rx_descriptors; 2399 2400 return card; 2401 } 2402 2403 /** 2404 * spider_net_undo_pci_setup - releases PCI ressources 2405 * @card: card structure 2406 * 2407 * spider_net_undo_pci_setup releases the mapped regions 2408 */ 2409 static void 2410 spider_net_undo_pci_setup(struct spider_net_card *card) 2411 { 2412 iounmap(card->regs); 2413 pci_release_regions(card->pdev); 2414 } 2415 2416 /** 2417 * spider_net_setup_pci_dev - sets up the device in terms of PCI operations 2418 * @pdev: PCI device 2419 * 2420 * Returns the card structure or NULL if any errors occur 2421 * 2422 * spider_net_setup_pci_dev initializes pdev and together with the 2423 * functions called in spider_net_open configures the device so that 2424 * data can be transferred over it 2425 * The net_device structure is attached to the card structure, if the 2426 * function returns without error. 2427 **/ 2428 static struct spider_net_card * 2429 spider_net_setup_pci_dev(struct pci_dev *pdev) 2430 { 2431 struct spider_net_card *card; 2432 unsigned long mmio_start, mmio_len; 2433 2434 if (pci_enable_device(pdev)) { 2435 dev_err(&pdev->dev, "Couldn't enable PCI device\n"); 2436 return NULL; 2437 } 2438 2439 if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) { 2440 dev_err(&pdev->dev, 2441 "Couldn't find proper PCI device base address.\n"); 2442 goto out_disable_dev; 2443 } 2444 2445 if (pci_request_regions(pdev, spider_net_driver_name)) { 2446 dev_err(&pdev->dev, 2447 "Couldn't obtain PCI resources, aborting.\n"); 2448 goto out_disable_dev; 2449 } 2450 2451 pci_set_master(pdev); 2452 2453 card = spider_net_alloc_card(); 2454 if (!card) { 2455 dev_err(&pdev->dev, 2456 "Couldn't allocate net_device structure, aborting.\n"); 2457 goto out_release_regions; 2458 } 2459 card->pdev = pdev; 2460 2461 /* fetch base address and length of first resource */ 2462 mmio_start = pci_resource_start(pdev, 0); 2463 mmio_len = pci_resource_len(pdev, 0); 2464 2465 card->netdev->mem_start = mmio_start; 2466 card->netdev->mem_end = mmio_start + mmio_len; 2467 card->regs = ioremap(mmio_start, mmio_len); 2468 2469 if (!card->regs) { 2470 dev_err(&pdev->dev, 2471 "Couldn't obtain PCI resources, aborting.\n"); 2472 goto out_release_regions; 2473 } 2474 2475 return card; 2476 2477 out_release_regions: 2478 pci_release_regions(pdev); 2479 out_disable_dev: 2480 pci_disable_device(pdev); 2481 pci_set_drvdata(pdev, NULL); 2482 return NULL; 2483 } 2484 2485 /** 2486 * spider_net_probe - initialization of a device 2487 * @pdev: PCI device 2488 * @ent: entry in the device id list 2489 * 2490 * Returns 0 on success, <0 on failure 2491 * 2492 * spider_net_probe initializes pdev and registers a net_device 2493 * structure for it. After that, the device can be ifconfig'ed up 2494 **/ 2495 static int 2496 spider_net_probe(struct pci_dev *pdev, const struct pci_device_id *ent) 2497 { 2498 int err = -EIO; 2499 struct spider_net_card *card; 2500 2501 card = spider_net_setup_pci_dev(pdev); 2502 if (!card) 2503 goto out; 2504 2505 spider_net_workaround_rxramfull(card); 2506 spider_net_init_card(card); 2507 2508 err = spider_net_setup_phy(card); 2509 if (err) 2510 goto out_undo_pci; 2511 2512 err = spider_net_setup_netdev(card); 2513 if (err) 2514 goto out_undo_pci; 2515 2516 return 0; 2517 2518 out_undo_pci: 2519 spider_net_undo_pci_setup(card); 2520 free_netdev(card->netdev); 2521 out: 2522 return err; 2523 } 2524 2525 /** 2526 * spider_net_remove - removal of a device 2527 * @pdev: PCI device 2528 * 2529 * Returns 0 on success, <0 on failure 2530 * 2531 * spider_net_remove is called to remove the device and unregisters the 2532 * net_device 2533 **/ 2534 static void 2535 spider_net_remove(struct pci_dev *pdev) 2536 { 2537 struct net_device *netdev; 2538 struct spider_net_card *card; 2539 2540 netdev = pci_get_drvdata(pdev); 2541 card = netdev_priv(netdev); 2542 2543 wait_event(card->waitq, 2544 atomic_read(&card->tx_timeout_task_counter) == 0); 2545 2546 unregister_netdev(netdev); 2547 2548 /* switch off card */ 2549 spider_net_write_reg(card, SPIDER_NET_CKRCTRL, 2550 SPIDER_NET_CKRCTRL_STOP_VALUE); 2551 spider_net_write_reg(card, SPIDER_NET_CKRCTRL, 2552 SPIDER_NET_CKRCTRL_RUN_VALUE); 2553 2554 spider_net_undo_pci_setup(card); 2555 free_netdev(netdev); 2556 } 2557 2558 static struct pci_driver spider_net_driver = { 2559 .name = spider_net_driver_name, 2560 .id_table = spider_net_pci_tbl, 2561 .probe = spider_net_probe, 2562 .remove = spider_net_remove 2563 }; 2564 2565 /** 2566 * spider_net_init - init function when the driver is loaded 2567 * 2568 * spider_net_init registers the device driver 2569 */ 2570 static int __init spider_net_init(void) 2571 { 2572 printk(KERN_INFO "Spidernet version %s.\n", VERSION); 2573 2574 if (rx_descriptors < SPIDER_NET_RX_DESCRIPTORS_MIN) { 2575 rx_descriptors = SPIDER_NET_RX_DESCRIPTORS_MIN; 2576 pr_info("adjusting rx descriptors to %i.\n", rx_descriptors); 2577 } 2578 if (rx_descriptors > SPIDER_NET_RX_DESCRIPTORS_MAX) { 2579 rx_descriptors = SPIDER_NET_RX_DESCRIPTORS_MAX; 2580 pr_info("adjusting rx descriptors to %i.\n", rx_descriptors); 2581 } 2582 if (tx_descriptors < SPIDER_NET_TX_DESCRIPTORS_MIN) { 2583 tx_descriptors = SPIDER_NET_TX_DESCRIPTORS_MIN; 2584 pr_info("adjusting tx descriptors to %i.\n", tx_descriptors); 2585 } 2586 if (tx_descriptors > SPIDER_NET_TX_DESCRIPTORS_MAX) { 2587 tx_descriptors = SPIDER_NET_TX_DESCRIPTORS_MAX; 2588 pr_info("adjusting tx descriptors to %i.\n", tx_descriptors); 2589 } 2590 2591 return pci_register_driver(&spider_net_driver); 2592 } 2593 2594 /** 2595 * spider_net_cleanup - exit function when driver is unloaded 2596 * 2597 * spider_net_cleanup unregisters the device driver 2598 */ 2599 static void __exit spider_net_cleanup(void) 2600 { 2601 pci_unregister_driver(&spider_net_driver); 2602 } 2603 2604 module_init(spider_net_init); 2605 module_exit(spider_net_cleanup); 2606