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