1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Network device driver for Cell Processor-Based Blade and Celleb platform 4 * 5 * (C) Copyright IBM Corp. 2005 6 * (C) Copyright 2006 TOSHIBA CORPORATION 7 * 8 * Authors : Utz Bacher <utz.bacher@de.ibm.com> 9 * Jens Osterkamp <Jens.Osterkamp@de.ibm.com> 10 */ 11 12 #include <linux/compiler.h> 13 #include <linux/crc32.h> 14 #include <linux/delay.h> 15 #include <linux/etherdevice.h> 16 #include <linux/ethtool.h> 17 #include <linux/firmware.h> 18 #include <linux/if_vlan.h> 19 #include <linux/in.h> 20 #include <linux/init.h> 21 #include <linux/interrupt.h> 22 #include <linux/gfp.h> 23 #include <linux/ioport.h> 24 #include <linux/ip.h> 25 #include <linux/kernel.h> 26 #include <linux/mii.h> 27 #include <linux/module.h> 28 #include <linux/netdevice.h> 29 #include <linux/device.h> 30 #include <linux/pci.h> 31 #include <linux/skbuff.h> 32 #include <linux/tcp.h> 33 #include <linux/types.h> 34 #include <linux/vmalloc.h> 35 #include <linux/wait.h> 36 #include <linux/workqueue.h> 37 #include <linux/bitops.h> 38 #include <net/checksum.h> 39 40 #include "spider_net.h" 41 42 MODULE_AUTHOR("Utz Bacher <utz.bacher@de.ibm.com> and Jens Osterkamp " \ 43 "<Jens.Osterkamp@de.ibm.com>"); 44 MODULE_DESCRIPTION("Spider Southbridge Gigabit Ethernet driver"); 45 MODULE_LICENSE("GPL"); 46 MODULE_VERSION(VERSION); 47 MODULE_FIRMWARE(SPIDER_NET_FIRMWARE_NAME); 48 49 static int rx_descriptors = SPIDER_NET_RX_DESCRIPTORS_DEFAULT; 50 static int tx_descriptors = SPIDER_NET_TX_DESCRIPTORS_DEFAULT; 51 52 module_param(rx_descriptors, int, 0444); 53 module_param(tx_descriptors, int, 0444); 54 55 MODULE_PARM_DESC(rx_descriptors, "number of descriptors used " \ 56 "in rx chains"); 57 MODULE_PARM_DESC(tx_descriptors, "number of descriptors used " \ 58 "in tx chain"); 59 60 char spider_net_driver_name[] = "spidernet"; 61 62 static const struct pci_device_id spider_net_pci_tbl[] = { 63 { PCI_VENDOR_ID_TOSHIBA_2, PCI_DEVICE_ID_TOSHIBA_SPIDER_NET, 64 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, 65 { 0, } 66 }; 67 68 MODULE_DEVICE_TABLE(pci, spider_net_pci_tbl); 69 70 /** 71 * spider_net_read_reg - reads an SMMIO register of a card 72 * @card: device structure 73 * @reg: register to read from 74 * 75 * returns the content of the specified SMMIO register. 76 */ 77 static inline u32 78 spider_net_read_reg(struct spider_net_card *card, u32 reg) 79 { 80 /* We use the powerpc specific variants instead of readl_be() because 81 * we know spidernet is not a real PCI device and we can thus avoid the 82 * performance hit caused by the PCI workarounds. 83 */ 84 return in_be32(card->regs + reg); 85 } 86 87 /** 88 * spider_net_write_reg - writes to an SMMIO register of a card 89 * @card: device structure 90 * @reg: register to write to 91 * @value: value to write into the specified SMMIO register 92 */ 93 static inline void 94 spider_net_write_reg(struct spider_net_card *card, u32 reg, u32 value) 95 { 96 /* We use the powerpc specific variants instead of writel_be() because 97 * we know spidernet is not a real PCI device and we can thus avoid the 98 * performance hit caused by the PCI workarounds. 99 */ 100 out_be32(card->regs + reg, value); 101 } 102 103 /** 104 * spider_net_write_phy - write to phy register 105 * @netdev: adapter to be written to 106 * @mii_id: id of MII 107 * @reg: PHY register 108 * @val: value to be written to phy register 109 * 110 * spider_net_write_phy_register writes to an arbitrary PHY 111 * register via the spider GPCWOPCMD register. We assume the queue does 112 * not run full (not more than 15 commands outstanding). 113 **/ 114 static void 115 spider_net_write_phy(struct net_device *netdev, int mii_id, 116 int reg, int val) 117 { 118 struct spider_net_card *card = netdev_priv(netdev); 119 u32 writevalue; 120 121 writevalue = ((u32)mii_id << 21) | 122 ((u32)reg << 16) | ((u32)val); 123 124 spider_net_write_reg(card, SPIDER_NET_GPCWOPCMD, writevalue); 125 } 126 127 /** 128 * spider_net_read_phy - read from phy register 129 * @netdev: network device to be read from 130 * @mii_id: id of MII 131 * @reg: PHY register 132 * 133 * Returns value read from PHY register 134 * 135 * spider_net_write_phy reads from an arbitrary PHY 136 * register via the spider GPCROPCMD register 137 **/ 138 static int 139 spider_net_read_phy(struct net_device *netdev, int mii_id, int reg) 140 { 141 struct spider_net_card *card = netdev_priv(netdev); 142 u32 readvalue; 143 144 readvalue = ((u32)mii_id << 21) | ((u32)reg << 16); 145 spider_net_write_reg(card, SPIDER_NET_GPCROPCMD, readvalue); 146 147 /* we don't use semaphores to wait for an SPIDER_NET_GPROPCMPINT 148 * interrupt, as we poll for the completion of the read operation 149 * in spider_net_read_phy. Should take about 50 us */ 150 do { 151 readvalue = spider_net_read_reg(card, SPIDER_NET_GPCROPCMD); 152 } while (readvalue & SPIDER_NET_GPREXEC); 153 154 readvalue &= SPIDER_NET_GPRDAT_MASK; 155 156 return readvalue; 157 } 158 159 /** 160 * spider_net_setup_aneg - initial auto-negotiation setup 161 * @card: device structure 162 **/ 163 static void 164 spider_net_setup_aneg(struct spider_net_card *card) 165 { 166 struct mii_phy *phy = &card->phy; 167 u32 advertise = 0; 168 u16 bmsr, estat; 169 170 bmsr = spider_net_read_phy(card->netdev, phy->mii_id, MII_BMSR); 171 estat = spider_net_read_phy(card->netdev, phy->mii_id, MII_ESTATUS); 172 173 if (bmsr & BMSR_10HALF) 174 advertise |= ADVERTISED_10baseT_Half; 175 if (bmsr & BMSR_10FULL) 176 advertise |= ADVERTISED_10baseT_Full; 177 if (bmsr & BMSR_100HALF) 178 advertise |= ADVERTISED_100baseT_Half; 179 if (bmsr & BMSR_100FULL) 180 advertise |= ADVERTISED_100baseT_Full; 181 182 if ((bmsr & BMSR_ESTATEN) && (estat & ESTATUS_1000_TFULL)) 183 advertise |= SUPPORTED_1000baseT_Full; 184 if ((bmsr & BMSR_ESTATEN) && (estat & ESTATUS_1000_THALF)) 185 advertise |= SUPPORTED_1000baseT_Half; 186 187 sungem_phy_probe(phy, phy->mii_id); 188 phy->def->ops->setup_aneg(phy, advertise); 189 190 } 191 192 /** 193 * spider_net_rx_irq_off - switch off rx irq on this spider card 194 * @card: device structure 195 * 196 * switches off rx irq by masking them out in the GHIINTnMSK register 197 */ 198 static void 199 spider_net_rx_irq_off(struct spider_net_card *card) 200 { 201 u32 regvalue; 202 203 regvalue = SPIDER_NET_INT0_MASK_VALUE & (~SPIDER_NET_RXINT); 204 spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, regvalue); 205 } 206 207 /** 208 * spider_net_rx_irq_on - switch on rx irq on this spider card 209 * @card: device structure 210 * 211 * switches on rx irq by enabling them in the GHIINTnMSK register 212 */ 213 static void 214 spider_net_rx_irq_on(struct spider_net_card *card) 215 { 216 u32 regvalue; 217 218 regvalue = SPIDER_NET_INT0_MASK_VALUE | SPIDER_NET_RXINT; 219 spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, regvalue); 220 } 221 222 /** 223 * spider_net_set_promisc - sets the unicast address or the promiscuous mode 224 * @card: card structure 225 * 226 * spider_net_set_promisc sets the unicast destination address filter and 227 * thus either allows for non-promisc mode or promisc mode 228 */ 229 static void 230 spider_net_set_promisc(struct spider_net_card *card) 231 { 232 u32 macu, macl; 233 struct net_device *netdev = card->netdev; 234 235 if (netdev->flags & IFF_PROMISC) { 236 /* clear destination entry 0 */ 237 spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR, 0); 238 spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR + 0x04, 0); 239 spider_net_write_reg(card, SPIDER_NET_GMRUA0FIL15R, 240 SPIDER_NET_PROMISC_VALUE); 241 } else { 242 macu = netdev->dev_addr[0]; 243 macu <<= 8; 244 macu |= netdev->dev_addr[1]; 245 memcpy(&macl, &netdev->dev_addr[2], sizeof(macl)); 246 247 macu |= SPIDER_NET_UA_DESCR_VALUE; 248 spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR, macu); 249 spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR + 0x04, macl); 250 spider_net_write_reg(card, SPIDER_NET_GMRUA0FIL15R, 251 SPIDER_NET_NONPROMISC_VALUE); 252 } 253 } 254 255 /** 256 * spider_net_get_descr_status -- returns the status of a descriptor 257 * @descr: descriptor to look at 258 * 259 * returns the status as in the dmac_cmd_status field of the descriptor 260 */ 261 static inline int 262 spider_net_get_descr_status(struct spider_net_hw_descr *hwdescr) 263 { 264 return hwdescr->dmac_cmd_status & SPIDER_NET_DESCR_IND_PROC_MASK; 265 } 266 267 /** 268 * spider_net_free_chain - free descriptor chain 269 * @card: card structure 270 * @chain: address of chain 271 * 272 */ 273 static void 274 spider_net_free_chain(struct spider_net_card *card, 275 struct spider_net_descr_chain *chain) 276 { 277 struct spider_net_descr *descr; 278 279 descr = chain->ring; 280 do { 281 descr->bus_addr = 0; 282 descr->hwdescr->next_descr_addr = 0; 283 descr = descr->next; 284 } while (descr != chain->ring); 285 286 dma_free_coherent(&card->pdev->dev, chain->num_desc, 287 chain->hwring, chain->dma_addr); 288 } 289 290 /** 291 * spider_net_init_chain - alloc and link descriptor chain 292 * @card: card structure 293 * @chain: address of chain 294 * 295 * We manage a circular list that mirrors the hardware structure, 296 * except that the hardware uses bus addresses. 297 * 298 * Returns 0 on success, <0 on failure 299 */ 300 static int 301 spider_net_init_chain(struct spider_net_card *card, 302 struct spider_net_descr_chain *chain) 303 { 304 int i; 305 struct spider_net_descr *descr; 306 struct spider_net_hw_descr *hwdescr; 307 dma_addr_t buf; 308 size_t alloc_size; 309 310 alloc_size = chain->num_desc * sizeof(struct spider_net_hw_descr); 311 312 chain->hwring = dma_alloc_coherent(&card->pdev->dev, alloc_size, 313 &chain->dma_addr, GFP_KERNEL); 314 if (!chain->hwring) 315 return -ENOMEM; 316 317 memset(chain->ring, 0, chain->num_desc * sizeof(struct spider_net_descr)); 318 319 /* Set up the hardware pointers in each descriptor */ 320 descr = chain->ring; 321 hwdescr = chain->hwring; 322 buf = chain->dma_addr; 323 for (i=0; i < chain->num_desc; i++, descr++, hwdescr++) { 324 hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE; 325 hwdescr->next_descr_addr = 0; 326 327 descr->hwdescr = hwdescr; 328 descr->bus_addr = buf; 329 descr->next = descr + 1; 330 descr->prev = descr - 1; 331 332 buf += sizeof(struct spider_net_hw_descr); 333 } 334 /* do actual circular list */ 335 (descr-1)->next = chain->ring; 336 chain->ring->prev = descr-1; 337 338 spin_lock_init(&chain->lock); 339 chain->head = chain->ring; 340 chain->tail = chain->ring; 341 return 0; 342 } 343 344 /** 345 * spider_net_free_rx_chain_contents - frees descr contents in rx chain 346 * @card: card structure 347 * 348 * returns 0 on success, <0 on failure 349 */ 350 static void 351 spider_net_free_rx_chain_contents(struct spider_net_card *card) 352 { 353 struct spider_net_descr *descr; 354 355 descr = card->rx_chain.head; 356 do { 357 if (descr->skb) { 358 pci_unmap_single(card->pdev, descr->hwdescr->buf_addr, 359 SPIDER_NET_MAX_FRAME, 360 PCI_DMA_BIDIRECTIONAL); 361 dev_kfree_skb(descr->skb); 362 descr->skb = NULL; 363 } 364 descr = descr->next; 365 } while (descr != card->rx_chain.head); 366 } 367 368 /** 369 * spider_net_prepare_rx_descr - Reinitialize RX descriptor 370 * @card: card structure 371 * @descr: descriptor to re-init 372 * 373 * Return 0 on success, <0 on failure. 374 * 375 * Allocates a new rx skb, iommu-maps it and attaches it to the 376 * descriptor. Mark the descriptor as activated, ready-to-use. 377 */ 378 static int 379 spider_net_prepare_rx_descr(struct spider_net_card *card, 380 struct spider_net_descr *descr) 381 { 382 struct spider_net_hw_descr *hwdescr = descr->hwdescr; 383 dma_addr_t buf; 384 int offset; 385 int bufsize; 386 387 /* we need to round up the buffer size to a multiple of 128 */ 388 bufsize = (SPIDER_NET_MAX_FRAME + SPIDER_NET_RXBUF_ALIGN - 1) & 389 (~(SPIDER_NET_RXBUF_ALIGN - 1)); 390 391 /* and we need to have it 128 byte aligned, therefore we allocate a 392 * bit more */ 393 /* allocate an skb */ 394 descr->skb = netdev_alloc_skb(card->netdev, 395 bufsize + SPIDER_NET_RXBUF_ALIGN - 1); 396 if (!descr->skb) { 397 if (netif_msg_rx_err(card) && net_ratelimit()) 398 dev_err(&card->netdev->dev, 399 "Not enough memory to allocate rx buffer\n"); 400 card->spider_stats.alloc_rx_skb_error++; 401 return -ENOMEM; 402 } 403 hwdescr->buf_size = bufsize; 404 hwdescr->result_size = 0; 405 hwdescr->valid_size = 0; 406 hwdescr->data_status = 0; 407 hwdescr->data_error = 0; 408 409 offset = ((unsigned long)descr->skb->data) & 410 (SPIDER_NET_RXBUF_ALIGN - 1); 411 if (offset) 412 skb_reserve(descr->skb, SPIDER_NET_RXBUF_ALIGN - offset); 413 /* iommu-map the skb */ 414 buf = pci_map_single(card->pdev, descr->skb->data, 415 SPIDER_NET_MAX_FRAME, PCI_DMA_FROMDEVICE); 416 if (pci_dma_mapping_error(card->pdev, buf)) { 417 dev_kfree_skb_any(descr->skb); 418 descr->skb = NULL; 419 if (netif_msg_rx_err(card) && net_ratelimit()) 420 dev_err(&card->netdev->dev, "Could not iommu-map rx buffer\n"); 421 card->spider_stats.rx_iommu_map_error++; 422 hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE; 423 } else { 424 hwdescr->buf_addr = buf; 425 wmb(); 426 hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_CARDOWNED | 427 SPIDER_NET_DMAC_NOINTR_COMPLETE; 428 } 429 430 return 0; 431 } 432 433 /** 434 * spider_net_enable_rxchtails - sets RX dmac chain tail addresses 435 * @card: card structure 436 * 437 * spider_net_enable_rxchtails sets the RX DMAC chain tail addresses in the 438 * chip by writing to the appropriate register. DMA is enabled in 439 * spider_net_enable_rxdmac. 440 */ 441 static inline void 442 spider_net_enable_rxchtails(struct spider_net_card *card) 443 { 444 /* assume chain is aligned correctly */ 445 spider_net_write_reg(card, SPIDER_NET_GDADCHA , 446 card->rx_chain.tail->bus_addr); 447 } 448 449 /** 450 * spider_net_enable_rxdmac - enables a receive DMA controller 451 * @card: card structure 452 * 453 * spider_net_enable_rxdmac enables the DMA controller by setting RX_DMA_EN 454 * in the GDADMACCNTR register 455 */ 456 static inline void 457 spider_net_enable_rxdmac(struct spider_net_card *card) 458 { 459 wmb(); 460 spider_net_write_reg(card, SPIDER_NET_GDADMACCNTR, 461 SPIDER_NET_DMA_RX_VALUE); 462 } 463 464 /** 465 * spider_net_disable_rxdmac - disables the receive DMA controller 466 * @card: card structure 467 * 468 * spider_net_disable_rxdmac terminates processing on the DMA controller 469 * by turing off the DMA controller, with the force-end flag set. 470 */ 471 static inline void 472 spider_net_disable_rxdmac(struct spider_net_card *card) 473 { 474 spider_net_write_reg(card, SPIDER_NET_GDADMACCNTR, 475 SPIDER_NET_DMA_RX_FEND_VALUE); 476 } 477 478 /** 479 * spider_net_refill_rx_chain - refills descriptors/skbs in the rx chains 480 * @card: card structure 481 * 482 * refills descriptors in the rx chain: allocates skbs and iommu-maps them. 483 */ 484 static void 485 spider_net_refill_rx_chain(struct spider_net_card *card) 486 { 487 struct spider_net_descr_chain *chain = &card->rx_chain; 488 unsigned long flags; 489 490 /* one context doing the refill (and a second context seeing that 491 * and omitting it) is ok. If called by NAPI, we'll be called again 492 * as spider_net_decode_one_descr is called several times. If some 493 * interrupt calls us, the NAPI is about to clean up anyway. */ 494 if (!spin_trylock_irqsave(&chain->lock, flags)) 495 return; 496 497 while (spider_net_get_descr_status(chain->head->hwdescr) == 498 SPIDER_NET_DESCR_NOT_IN_USE) { 499 if (spider_net_prepare_rx_descr(card, chain->head)) 500 break; 501 chain->head = chain->head->next; 502 } 503 504 spin_unlock_irqrestore(&chain->lock, flags); 505 } 506 507 /** 508 * spider_net_alloc_rx_skbs - Allocates rx skbs in rx descriptor chains 509 * @card: card structure 510 * 511 * Returns 0 on success, <0 on failure. 512 */ 513 static int 514 spider_net_alloc_rx_skbs(struct spider_net_card *card) 515 { 516 struct spider_net_descr_chain *chain = &card->rx_chain; 517 struct spider_net_descr *start = chain->tail; 518 struct spider_net_descr *descr = start; 519 520 /* Link up the hardware chain pointers */ 521 do { 522 descr->prev->hwdescr->next_descr_addr = descr->bus_addr; 523 descr = descr->next; 524 } while (descr != start); 525 526 /* Put at least one buffer into the chain. if this fails, 527 * we've got a problem. If not, spider_net_refill_rx_chain 528 * will do the rest at the end of this function. */ 529 if (spider_net_prepare_rx_descr(card, chain->head)) 530 goto error; 531 else 532 chain->head = chain->head->next; 533 534 /* This will allocate the rest of the rx buffers; 535 * if not, it's business as usual later on. */ 536 spider_net_refill_rx_chain(card); 537 spider_net_enable_rxdmac(card); 538 return 0; 539 540 error: 541 spider_net_free_rx_chain_contents(card); 542 return -ENOMEM; 543 } 544 545 /** 546 * spider_net_get_multicast_hash - generates hash for multicast filter table 547 * @addr: multicast address 548 * 549 * returns the hash value. 550 * 551 * spider_net_get_multicast_hash calculates a hash value for a given multicast 552 * address, that is used to set the multicast filter tables 553 */ 554 static u8 555 spider_net_get_multicast_hash(struct net_device *netdev, __u8 *addr) 556 { 557 u32 crc; 558 u8 hash; 559 char addr_for_crc[ETH_ALEN] = { 0, }; 560 int i, bit; 561 562 for (i = 0; i < ETH_ALEN * 8; i++) { 563 bit = (addr[i / 8] >> (i % 8)) & 1; 564 addr_for_crc[ETH_ALEN - 1 - i / 8] += bit << (7 - (i % 8)); 565 } 566 567 crc = crc32_be(~0, addr_for_crc, netdev->addr_len); 568 569 hash = (crc >> 27); 570 hash <<= 3; 571 hash |= crc & 7; 572 hash &= 0xff; 573 574 return hash; 575 } 576 577 /** 578 * spider_net_set_multi - sets multicast addresses and promisc flags 579 * @netdev: interface device structure 580 * 581 * spider_net_set_multi configures multicast addresses as needed for the 582 * netdev interface. It also sets up multicast, allmulti and promisc 583 * flags appropriately 584 */ 585 static void 586 spider_net_set_multi(struct net_device *netdev) 587 { 588 struct netdev_hw_addr *ha; 589 u8 hash; 590 int i; 591 u32 reg; 592 struct spider_net_card *card = netdev_priv(netdev); 593 DECLARE_BITMAP(bitmask, SPIDER_NET_MULTICAST_HASHES) = {}; 594 595 spider_net_set_promisc(card); 596 597 if (netdev->flags & IFF_ALLMULTI) { 598 for (i = 0; i < SPIDER_NET_MULTICAST_HASHES; i++) { 599 set_bit(i, bitmask); 600 } 601 goto write_hash; 602 } 603 604 /* well, we know, what the broadcast hash value is: it's xfd 605 hash = spider_net_get_multicast_hash(netdev, netdev->broadcast); */ 606 set_bit(0xfd, bitmask); 607 608 netdev_for_each_mc_addr(ha, netdev) { 609 hash = spider_net_get_multicast_hash(netdev, ha->addr); 610 set_bit(hash, bitmask); 611 } 612 613 write_hash: 614 for (i = 0; i < SPIDER_NET_MULTICAST_HASHES / 4; i++) { 615 reg = 0; 616 if (test_bit(i * 4, bitmask)) 617 reg += 0x08; 618 reg <<= 8; 619 if (test_bit(i * 4 + 1, bitmask)) 620 reg += 0x08; 621 reg <<= 8; 622 if (test_bit(i * 4 + 2, bitmask)) 623 reg += 0x08; 624 reg <<= 8; 625 if (test_bit(i * 4 + 3, bitmask)) 626 reg += 0x08; 627 628 spider_net_write_reg(card, SPIDER_NET_GMRMHFILnR + i * 4, reg); 629 } 630 } 631 632 /** 633 * spider_net_prepare_tx_descr - fill tx descriptor with skb data 634 * @card: card structure 635 * @skb: packet to use 636 * 637 * returns 0 on success, <0 on failure. 638 * 639 * fills out the descriptor structure with skb data and len. Copies data, 640 * if needed (32bit DMA!) 641 */ 642 static int 643 spider_net_prepare_tx_descr(struct spider_net_card *card, 644 struct sk_buff *skb) 645 { 646 struct spider_net_descr_chain *chain = &card->tx_chain; 647 struct spider_net_descr *descr; 648 struct spider_net_hw_descr *hwdescr; 649 dma_addr_t buf; 650 unsigned long flags; 651 652 buf = pci_map_single(card->pdev, skb->data, skb->len, PCI_DMA_TODEVICE); 653 if (pci_dma_mapping_error(card->pdev, buf)) { 654 if (netif_msg_tx_err(card) && net_ratelimit()) 655 dev_err(&card->netdev->dev, "could not iommu-map packet (%p, %i). " 656 "Dropping packet\n", skb->data, skb->len); 657 card->spider_stats.tx_iommu_map_error++; 658 return -ENOMEM; 659 } 660 661 spin_lock_irqsave(&chain->lock, flags); 662 descr = card->tx_chain.head; 663 if (descr->next == chain->tail->prev) { 664 spin_unlock_irqrestore(&chain->lock, flags); 665 pci_unmap_single(card->pdev, buf, skb->len, PCI_DMA_TODEVICE); 666 return -ENOMEM; 667 } 668 hwdescr = descr->hwdescr; 669 chain->head = descr->next; 670 671 descr->skb = skb; 672 hwdescr->buf_addr = buf; 673 hwdescr->buf_size = skb->len; 674 hwdescr->next_descr_addr = 0; 675 hwdescr->data_status = 0; 676 677 hwdescr->dmac_cmd_status = 678 SPIDER_NET_DESCR_CARDOWNED | SPIDER_NET_DMAC_TXFRMTL; 679 spin_unlock_irqrestore(&chain->lock, flags); 680 681 if (skb->ip_summed == CHECKSUM_PARTIAL) 682 switch (ip_hdr(skb)->protocol) { 683 case IPPROTO_TCP: 684 hwdescr->dmac_cmd_status |= SPIDER_NET_DMAC_TCP; 685 break; 686 case IPPROTO_UDP: 687 hwdescr->dmac_cmd_status |= SPIDER_NET_DMAC_UDP; 688 break; 689 } 690 691 /* Chain the bus address, so that the DMA engine finds this descr. */ 692 wmb(); 693 descr->prev->hwdescr->next_descr_addr = descr->bus_addr; 694 695 netif_trans_update(card->netdev); /* set netdev watchdog timer */ 696 return 0; 697 } 698 699 static int 700 spider_net_set_low_watermark(struct spider_net_card *card) 701 { 702 struct spider_net_descr *descr = card->tx_chain.tail; 703 struct spider_net_hw_descr *hwdescr; 704 unsigned long flags; 705 int status; 706 int cnt=0; 707 int i; 708 709 /* Measure the length of the queue. Measurement does not 710 * need to be precise -- does not need a lock. */ 711 while (descr != card->tx_chain.head) { 712 status = descr->hwdescr->dmac_cmd_status & SPIDER_NET_DESCR_NOT_IN_USE; 713 if (status == SPIDER_NET_DESCR_NOT_IN_USE) 714 break; 715 descr = descr->next; 716 cnt++; 717 } 718 719 /* If TX queue is short, don't even bother with interrupts */ 720 if (cnt < card->tx_chain.num_desc/4) 721 return cnt; 722 723 /* Set low-watermark 3/4th's of the way into the queue. */ 724 descr = card->tx_chain.tail; 725 cnt = (cnt*3)/4; 726 for (i=0;i<cnt; i++) 727 descr = descr->next; 728 729 /* Set the new watermark, clear the old watermark */ 730 spin_lock_irqsave(&card->tx_chain.lock, flags); 731 descr->hwdescr->dmac_cmd_status |= SPIDER_NET_DESCR_TXDESFLG; 732 if (card->low_watermark && card->low_watermark != descr) { 733 hwdescr = card->low_watermark->hwdescr; 734 hwdescr->dmac_cmd_status = 735 hwdescr->dmac_cmd_status & ~SPIDER_NET_DESCR_TXDESFLG; 736 } 737 card->low_watermark = descr; 738 spin_unlock_irqrestore(&card->tx_chain.lock, flags); 739 return cnt; 740 } 741 742 /** 743 * spider_net_release_tx_chain - processes sent tx descriptors 744 * @card: adapter structure 745 * @brutal: if set, don't care about whether descriptor seems to be in use 746 * 747 * returns 0 if the tx ring is empty, otherwise 1. 748 * 749 * spider_net_release_tx_chain releases the tx descriptors that spider has 750 * finished with (if non-brutal) or simply release tx descriptors (if brutal). 751 * If some other context is calling this function, we return 1 so that we're 752 * scheduled again (if we were scheduled) and will not lose initiative. 753 */ 754 static int 755 spider_net_release_tx_chain(struct spider_net_card *card, int brutal) 756 { 757 struct net_device *dev = card->netdev; 758 struct spider_net_descr_chain *chain = &card->tx_chain; 759 struct spider_net_descr *descr; 760 struct spider_net_hw_descr *hwdescr; 761 struct sk_buff *skb; 762 u32 buf_addr; 763 unsigned long flags; 764 int status; 765 766 while (1) { 767 spin_lock_irqsave(&chain->lock, flags); 768 if (chain->tail == chain->head) { 769 spin_unlock_irqrestore(&chain->lock, flags); 770 return 0; 771 } 772 descr = chain->tail; 773 hwdescr = descr->hwdescr; 774 775 status = spider_net_get_descr_status(hwdescr); 776 switch (status) { 777 case SPIDER_NET_DESCR_COMPLETE: 778 dev->stats.tx_packets++; 779 dev->stats.tx_bytes += descr->skb->len; 780 break; 781 782 case SPIDER_NET_DESCR_CARDOWNED: 783 if (!brutal) { 784 spin_unlock_irqrestore(&chain->lock, flags); 785 return 1; 786 } 787 788 /* fallthrough, if we release the descriptors 789 * brutally (then we don't care about 790 * SPIDER_NET_DESCR_CARDOWNED) */ 791 /* Fall through */ 792 793 case SPIDER_NET_DESCR_RESPONSE_ERROR: 794 case SPIDER_NET_DESCR_PROTECTION_ERROR: 795 case SPIDER_NET_DESCR_FORCE_END: 796 if (netif_msg_tx_err(card)) 797 dev_err(&card->netdev->dev, "forcing end of tx descriptor " 798 "with status x%02x\n", status); 799 dev->stats.tx_errors++; 800 break; 801 802 default: 803 dev->stats.tx_dropped++; 804 if (!brutal) { 805 spin_unlock_irqrestore(&chain->lock, flags); 806 return 1; 807 } 808 } 809 810 chain->tail = descr->next; 811 hwdescr->dmac_cmd_status |= SPIDER_NET_DESCR_NOT_IN_USE; 812 skb = descr->skb; 813 descr->skb = NULL; 814 buf_addr = hwdescr->buf_addr; 815 spin_unlock_irqrestore(&chain->lock, flags); 816 817 /* unmap the skb */ 818 if (skb) { 819 pci_unmap_single(card->pdev, buf_addr, skb->len, 820 PCI_DMA_TODEVICE); 821 dev_consume_skb_any(skb); 822 } 823 } 824 return 0; 825 } 826 827 /** 828 * spider_net_kick_tx_dma - enables TX DMA processing 829 * @card: card structure 830 * 831 * This routine will start the transmit DMA running if 832 * it is not already running. This routine ned only be 833 * called when queueing a new packet to an empty tx queue. 834 * Writes the current tx chain head as start address 835 * of the tx descriptor chain and enables the transmission 836 * DMA engine. 837 */ 838 static inline void 839 spider_net_kick_tx_dma(struct spider_net_card *card) 840 { 841 struct spider_net_descr *descr; 842 843 if (spider_net_read_reg(card, SPIDER_NET_GDTDMACCNTR) & 844 SPIDER_NET_TX_DMA_EN) 845 goto out; 846 847 descr = card->tx_chain.tail; 848 for (;;) { 849 if (spider_net_get_descr_status(descr->hwdescr) == 850 SPIDER_NET_DESCR_CARDOWNED) { 851 spider_net_write_reg(card, SPIDER_NET_GDTDCHA, 852 descr->bus_addr); 853 spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR, 854 SPIDER_NET_DMA_TX_VALUE); 855 break; 856 } 857 if (descr == card->tx_chain.head) 858 break; 859 descr = descr->next; 860 } 861 862 out: 863 mod_timer(&card->tx_timer, jiffies + SPIDER_NET_TX_TIMER); 864 } 865 866 /** 867 * spider_net_xmit - transmits a frame over the device 868 * @skb: packet to send out 869 * @netdev: interface device structure 870 * 871 * returns NETDEV_TX_OK on success, NETDEV_TX_BUSY on failure 872 */ 873 static netdev_tx_t 874 spider_net_xmit(struct sk_buff *skb, struct net_device *netdev) 875 { 876 int cnt; 877 struct spider_net_card *card = netdev_priv(netdev); 878 879 spider_net_release_tx_chain(card, 0); 880 881 if (spider_net_prepare_tx_descr(card, skb) != 0) { 882 netdev->stats.tx_dropped++; 883 netif_stop_queue(netdev); 884 return NETDEV_TX_BUSY; 885 } 886 887 cnt = spider_net_set_low_watermark(card); 888 if (cnt < 5) 889 spider_net_kick_tx_dma(card); 890 return NETDEV_TX_OK; 891 } 892 893 /** 894 * spider_net_cleanup_tx_ring - cleans up the TX ring 895 * @card: card structure 896 * 897 * spider_net_cleanup_tx_ring is called by either the tx_timer 898 * or from the NAPI polling routine. 899 * This routine releases resources associted with transmitted 900 * packets, including updating the queue tail pointer. 901 */ 902 static void 903 spider_net_cleanup_tx_ring(struct timer_list *t) 904 { 905 struct spider_net_card *card = from_timer(card, t, tx_timer); 906 if ((spider_net_release_tx_chain(card, 0) != 0) && 907 (card->netdev->flags & IFF_UP)) { 908 spider_net_kick_tx_dma(card); 909 netif_wake_queue(card->netdev); 910 } 911 } 912 913 /** 914 * spider_net_do_ioctl - called for device ioctls 915 * @netdev: interface device structure 916 * @ifr: request parameter structure for ioctl 917 * @cmd: command code for ioctl 918 * 919 * returns 0 on success, <0 on failure. Currently, we have no special ioctls. 920 * -EOPNOTSUPP is returned, if an unknown ioctl was requested 921 */ 922 static int 923 spider_net_do_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd) 924 { 925 switch (cmd) { 926 default: 927 return -EOPNOTSUPP; 928 } 929 } 930 931 /** 932 * spider_net_pass_skb_up - takes an skb from a descriptor and passes it on 933 * @descr: descriptor to process 934 * @card: card structure 935 * 936 * Fills out skb structure and passes the data to the stack. 937 * The descriptor state is not changed. 938 */ 939 static void 940 spider_net_pass_skb_up(struct spider_net_descr *descr, 941 struct spider_net_card *card) 942 { 943 struct spider_net_hw_descr *hwdescr = descr->hwdescr; 944 struct sk_buff *skb = descr->skb; 945 struct net_device *netdev = card->netdev; 946 u32 data_status = hwdescr->data_status; 947 u32 data_error = hwdescr->data_error; 948 949 skb_put(skb, hwdescr->valid_size); 950 951 /* the card seems to add 2 bytes of junk in front 952 * of the ethernet frame */ 953 #define SPIDER_MISALIGN 2 954 skb_pull(skb, SPIDER_MISALIGN); 955 skb->protocol = eth_type_trans(skb, netdev); 956 957 /* checksum offload */ 958 skb_checksum_none_assert(skb); 959 if (netdev->features & NETIF_F_RXCSUM) { 960 if ( ( (data_status & SPIDER_NET_DATA_STATUS_CKSUM_MASK) == 961 SPIDER_NET_DATA_STATUS_CKSUM_MASK) && 962 !(data_error & SPIDER_NET_DATA_ERR_CKSUM_MASK)) 963 skb->ip_summed = CHECKSUM_UNNECESSARY; 964 } 965 966 if (data_status & SPIDER_NET_VLAN_PACKET) { 967 /* further enhancements: HW-accel VLAN */ 968 } 969 970 /* update netdevice statistics */ 971 netdev->stats.rx_packets++; 972 netdev->stats.rx_bytes += skb->len; 973 974 /* pass skb up to stack */ 975 netif_receive_skb(skb); 976 } 977 978 static void show_rx_chain(struct spider_net_card *card) 979 { 980 struct spider_net_descr_chain *chain = &card->rx_chain; 981 struct spider_net_descr *start= chain->tail; 982 struct spider_net_descr *descr= start; 983 struct spider_net_hw_descr *hwd = start->hwdescr; 984 struct device *dev = &card->netdev->dev; 985 u32 curr_desc, next_desc; 986 int status; 987 988 int tot = 0; 989 int cnt = 0; 990 int off = start - chain->ring; 991 int cstat = hwd->dmac_cmd_status; 992 993 dev_info(dev, "Total number of descrs=%d\n", 994 chain->num_desc); 995 dev_info(dev, "Chain tail located at descr=%d, status=0x%x\n", 996 off, cstat); 997 998 curr_desc = spider_net_read_reg(card, SPIDER_NET_GDACTDPA); 999 next_desc = spider_net_read_reg(card, SPIDER_NET_GDACNEXTDA); 1000 1001 status = cstat; 1002 do 1003 { 1004 hwd = descr->hwdescr; 1005 off = descr - chain->ring; 1006 status = hwd->dmac_cmd_status; 1007 1008 if (descr == chain->head) 1009 dev_info(dev, "Chain head is at %d, head status=0x%x\n", 1010 off, status); 1011 1012 if (curr_desc == descr->bus_addr) 1013 dev_info(dev, "HW curr desc (GDACTDPA) is at %d, status=0x%x\n", 1014 off, status); 1015 1016 if (next_desc == descr->bus_addr) 1017 dev_info(dev, "HW next desc (GDACNEXTDA) is at %d, status=0x%x\n", 1018 off, status); 1019 1020 if (hwd->next_descr_addr == 0) 1021 dev_info(dev, "chain is cut at %d\n", off); 1022 1023 if (cstat != status) { 1024 int from = (chain->num_desc + off - cnt) % chain->num_desc; 1025 int to = (chain->num_desc + off - 1) % chain->num_desc; 1026 dev_info(dev, "Have %d (from %d to %d) descrs " 1027 "with stat=0x%08x\n", cnt, from, to, cstat); 1028 cstat = status; 1029 cnt = 0; 1030 } 1031 1032 cnt ++; 1033 tot ++; 1034 descr = descr->next; 1035 } while (descr != start); 1036 1037 dev_info(dev, "Last %d descrs with stat=0x%08x " 1038 "for a total of %d descrs\n", cnt, cstat, tot); 1039 1040 #ifdef DEBUG 1041 /* Now dump the whole ring */ 1042 descr = start; 1043 do 1044 { 1045 struct spider_net_hw_descr *hwd = descr->hwdescr; 1046 status = spider_net_get_descr_status(hwd); 1047 cnt = descr - chain->ring; 1048 dev_info(dev, "Descr %d stat=0x%08x skb=%p\n", 1049 cnt, status, descr->skb); 1050 dev_info(dev, "bus addr=%08x buf addr=%08x sz=%d\n", 1051 descr->bus_addr, hwd->buf_addr, hwd->buf_size); 1052 dev_info(dev, "next=%08x result sz=%d valid sz=%d\n", 1053 hwd->next_descr_addr, hwd->result_size, 1054 hwd->valid_size); 1055 dev_info(dev, "dmac=%08x data stat=%08x data err=%08x\n", 1056 hwd->dmac_cmd_status, hwd->data_status, 1057 hwd->data_error); 1058 dev_info(dev, "\n"); 1059 1060 descr = descr->next; 1061 } while (descr != start); 1062 #endif 1063 1064 } 1065 1066 /** 1067 * spider_net_resync_head_ptr - Advance head ptr past empty descrs 1068 * 1069 * If the driver fails to keep up and empty the queue, then the 1070 * hardware wil run out of room to put incoming packets. This 1071 * will cause the hardware to skip descrs that are full (instead 1072 * of halting/retrying). Thus, once the driver runs, it wil need 1073 * to "catch up" to where the hardware chain pointer is at. 1074 */ 1075 static void spider_net_resync_head_ptr(struct spider_net_card *card) 1076 { 1077 unsigned long flags; 1078 struct spider_net_descr_chain *chain = &card->rx_chain; 1079 struct spider_net_descr *descr; 1080 int i, status; 1081 1082 /* Advance head pointer past any empty descrs */ 1083 descr = chain->head; 1084 status = spider_net_get_descr_status(descr->hwdescr); 1085 1086 if (status == SPIDER_NET_DESCR_NOT_IN_USE) 1087 return; 1088 1089 spin_lock_irqsave(&chain->lock, flags); 1090 1091 descr = chain->head; 1092 status = spider_net_get_descr_status(descr->hwdescr); 1093 for (i=0; i<chain->num_desc; i++) { 1094 if (status != SPIDER_NET_DESCR_CARDOWNED) break; 1095 descr = descr->next; 1096 status = spider_net_get_descr_status(descr->hwdescr); 1097 } 1098 chain->head = descr; 1099 1100 spin_unlock_irqrestore(&chain->lock, flags); 1101 } 1102 1103 static int spider_net_resync_tail_ptr(struct spider_net_card *card) 1104 { 1105 struct spider_net_descr_chain *chain = &card->rx_chain; 1106 struct spider_net_descr *descr; 1107 int i, status; 1108 1109 /* Advance tail pointer past any empty and reaped descrs */ 1110 descr = chain->tail; 1111 status = spider_net_get_descr_status(descr->hwdescr); 1112 1113 for (i=0; i<chain->num_desc; i++) { 1114 if ((status != SPIDER_NET_DESCR_CARDOWNED) && 1115 (status != SPIDER_NET_DESCR_NOT_IN_USE)) break; 1116 descr = descr->next; 1117 status = spider_net_get_descr_status(descr->hwdescr); 1118 } 1119 chain->tail = descr; 1120 1121 if ((i == chain->num_desc) || (i == 0)) 1122 return 1; 1123 return 0; 1124 } 1125 1126 /** 1127 * spider_net_decode_one_descr - processes an RX descriptor 1128 * @card: card structure 1129 * 1130 * Returns 1 if a packet has been sent to the stack, otherwise 0. 1131 * 1132 * Processes an RX descriptor by iommu-unmapping the data buffer 1133 * and passing the packet up to the stack. This function is called 1134 * in softirq context, e.g. either bottom half from interrupt or 1135 * NAPI polling context. 1136 */ 1137 static int 1138 spider_net_decode_one_descr(struct spider_net_card *card) 1139 { 1140 struct net_device *dev = card->netdev; 1141 struct spider_net_descr_chain *chain = &card->rx_chain; 1142 struct spider_net_descr *descr = chain->tail; 1143 struct spider_net_hw_descr *hwdescr = descr->hwdescr; 1144 u32 hw_buf_addr; 1145 int status; 1146 1147 status = spider_net_get_descr_status(hwdescr); 1148 1149 /* Nothing in the descriptor, or ring must be empty */ 1150 if ((status == SPIDER_NET_DESCR_CARDOWNED) || 1151 (status == SPIDER_NET_DESCR_NOT_IN_USE)) 1152 return 0; 1153 1154 /* descriptor definitively used -- move on tail */ 1155 chain->tail = descr->next; 1156 1157 /* unmap descriptor */ 1158 hw_buf_addr = hwdescr->buf_addr; 1159 hwdescr->buf_addr = 0xffffffff; 1160 pci_unmap_single(card->pdev, hw_buf_addr, 1161 SPIDER_NET_MAX_FRAME, PCI_DMA_FROMDEVICE); 1162 1163 if ( (status == SPIDER_NET_DESCR_RESPONSE_ERROR) || 1164 (status == SPIDER_NET_DESCR_PROTECTION_ERROR) || 1165 (status == SPIDER_NET_DESCR_FORCE_END) ) { 1166 if (netif_msg_rx_err(card)) 1167 dev_err(&dev->dev, 1168 "dropping RX descriptor with state %d\n", status); 1169 dev->stats.rx_dropped++; 1170 goto bad_desc; 1171 } 1172 1173 if ( (status != SPIDER_NET_DESCR_COMPLETE) && 1174 (status != SPIDER_NET_DESCR_FRAME_END) ) { 1175 if (netif_msg_rx_err(card)) 1176 dev_err(&card->netdev->dev, 1177 "RX descriptor with unknown state %d\n", status); 1178 card->spider_stats.rx_desc_unk_state++; 1179 goto bad_desc; 1180 } 1181 1182 /* The cases we'll throw away the packet immediately */ 1183 if (hwdescr->data_error & SPIDER_NET_DESTROY_RX_FLAGS) { 1184 if (netif_msg_rx_err(card)) 1185 dev_err(&card->netdev->dev, 1186 "error in received descriptor found, " 1187 "data_status=x%08x, data_error=x%08x\n", 1188 hwdescr->data_status, hwdescr->data_error); 1189 goto bad_desc; 1190 } 1191 1192 if (hwdescr->dmac_cmd_status & SPIDER_NET_DESCR_BAD_STATUS) { 1193 dev_err(&card->netdev->dev, "bad status, cmd_status=x%08x\n", 1194 hwdescr->dmac_cmd_status); 1195 pr_err("buf_addr=x%08x\n", hw_buf_addr); 1196 pr_err("buf_size=x%08x\n", hwdescr->buf_size); 1197 pr_err("next_descr_addr=x%08x\n", hwdescr->next_descr_addr); 1198 pr_err("result_size=x%08x\n", hwdescr->result_size); 1199 pr_err("valid_size=x%08x\n", hwdescr->valid_size); 1200 pr_err("data_status=x%08x\n", hwdescr->data_status); 1201 pr_err("data_error=x%08x\n", hwdescr->data_error); 1202 pr_err("which=%ld\n", descr - card->rx_chain.ring); 1203 1204 card->spider_stats.rx_desc_error++; 1205 goto bad_desc; 1206 } 1207 1208 /* Ok, we've got a packet in descr */ 1209 spider_net_pass_skb_up(descr, card); 1210 descr->skb = NULL; 1211 hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE; 1212 return 1; 1213 1214 bad_desc: 1215 if (netif_msg_rx_err(card)) 1216 show_rx_chain(card); 1217 dev_kfree_skb_irq(descr->skb); 1218 descr->skb = NULL; 1219 hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE; 1220 return 0; 1221 } 1222 1223 /** 1224 * spider_net_poll - NAPI poll function called by the stack to return packets 1225 * @netdev: interface device structure 1226 * @budget: number of packets we can pass to the stack at most 1227 * 1228 * returns 0 if no more packets available to the driver/stack. Returns 1, 1229 * if the quota is exceeded, but the driver has still packets. 1230 * 1231 * spider_net_poll returns all packets from the rx descriptors to the stack 1232 * (using netif_receive_skb). If all/enough packets are up, the driver 1233 * reenables interrupts and returns 0. If not, 1 is returned. 1234 */ 1235 static int spider_net_poll(struct napi_struct *napi, int budget) 1236 { 1237 struct spider_net_card *card = container_of(napi, struct spider_net_card, napi); 1238 int packets_done = 0; 1239 1240 while (packets_done < budget) { 1241 if (!spider_net_decode_one_descr(card)) 1242 break; 1243 1244 packets_done++; 1245 } 1246 1247 if ((packets_done == 0) && (card->num_rx_ints != 0)) { 1248 if (!spider_net_resync_tail_ptr(card)) 1249 packets_done = budget; 1250 spider_net_resync_head_ptr(card); 1251 } 1252 card->num_rx_ints = 0; 1253 1254 spider_net_refill_rx_chain(card); 1255 spider_net_enable_rxdmac(card); 1256 1257 spider_net_cleanup_tx_ring(&card->tx_timer); 1258 1259 /* if all packets are in the stack, enable interrupts and return 0 */ 1260 /* if not, return 1 */ 1261 if (packets_done < budget) { 1262 napi_complete_done(napi, packets_done); 1263 spider_net_rx_irq_on(card); 1264 card->ignore_rx_ramfull = 0; 1265 } 1266 1267 return packets_done; 1268 } 1269 1270 /** 1271 * spider_net_set_mac - sets the MAC of an interface 1272 * @netdev: interface device structure 1273 * @ptr: pointer to new MAC address 1274 * 1275 * Returns 0 on success, <0 on failure. Currently, we don't support this 1276 * and will always return EOPNOTSUPP. 1277 */ 1278 static int 1279 spider_net_set_mac(struct net_device *netdev, void *p) 1280 { 1281 struct spider_net_card *card = netdev_priv(netdev); 1282 u32 macl, macu, regvalue; 1283 struct sockaddr *addr = p; 1284 1285 if (!is_valid_ether_addr(addr->sa_data)) 1286 return -EADDRNOTAVAIL; 1287 1288 memcpy(netdev->dev_addr, addr->sa_data, ETH_ALEN); 1289 1290 /* switch off GMACTPE and GMACRPE */ 1291 regvalue = spider_net_read_reg(card, SPIDER_NET_GMACOPEMD); 1292 regvalue &= ~((1 << 5) | (1 << 6)); 1293 spider_net_write_reg(card, SPIDER_NET_GMACOPEMD, regvalue); 1294 1295 /* write mac */ 1296 macu = (netdev->dev_addr[0]<<24) + (netdev->dev_addr[1]<<16) + 1297 (netdev->dev_addr[2]<<8) + (netdev->dev_addr[3]); 1298 macl = (netdev->dev_addr[4]<<8) + (netdev->dev_addr[5]); 1299 spider_net_write_reg(card, SPIDER_NET_GMACUNIMACU, macu); 1300 spider_net_write_reg(card, SPIDER_NET_GMACUNIMACL, macl); 1301 1302 /* switch GMACTPE and GMACRPE back on */ 1303 regvalue = spider_net_read_reg(card, SPIDER_NET_GMACOPEMD); 1304 regvalue |= ((1 << 5) | (1 << 6)); 1305 spider_net_write_reg(card, SPIDER_NET_GMACOPEMD, regvalue); 1306 1307 spider_net_set_promisc(card); 1308 1309 return 0; 1310 } 1311 1312 /** 1313 * spider_net_link_reset 1314 * @netdev: net device structure 1315 * 1316 * This is called when the PHY_LINK signal is asserted. For the blade this is 1317 * not connected so we should never get here. 1318 * 1319 */ 1320 static void 1321 spider_net_link_reset(struct net_device *netdev) 1322 { 1323 1324 struct spider_net_card *card = netdev_priv(netdev); 1325 1326 del_timer_sync(&card->aneg_timer); 1327 1328 /* clear interrupt, block further interrupts */ 1329 spider_net_write_reg(card, SPIDER_NET_GMACST, 1330 spider_net_read_reg(card, SPIDER_NET_GMACST)); 1331 spider_net_write_reg(card, SPIDER_NET_GMACINTEN, 0); 1332 1333 /* reset phy and setup aneg */ 1334 card->aneg_count = 0; 1335 card->medium = BCM54XX_COPPER; 1336 spider_net_setup_aneg(card); 1337 mod_timer(&card->aneg_timer, jiffies + SPIDER_NET_ANEG_TIMER); 1338 1339 } 1340 1341 /** 1342 * spider_net_handle_error_irq - handles errors raised by an interrupt 1343 * @card: card structure 1344 * @status_reg: interrupt status register 0 (GHIINT0STS) 1345 * 1346 * spider_net_handle_error_irq treats or ignores all error conditions 1347 * found when an interrupt is presented 1348 */ 1349 static void 1350 spider_net_handle_error_irq(struct spider_net_card *card, u32 status_reg, 1351 u32 error_reg1, u32 error_reg2) 1352 { 1353 u32 i; 1354 int show_error = 1; 1355 1356 /* check GHIINT0STS ************************************/ 1357 if (status_reg) 1358 for (i = 0; i < 32; i++) 1359 if (status_reg & (1<<i)) 1360 switch (i) 1361 { 1362 /* let error_reg1 and error_reg2 evaluation decide, what to do 1363 case SPIDER_NET_PHYINT: 1364 case SPIDER_NET_GMAC2INT: 1365 case SPIDER_NET_GMAC1INT: 1366 case SPIDER_NET_GFIFOINT: 1367 case SPIDER_NET_DMACINT: 1368 case SPIDER_NET_GSYSINT: 1369 break; */ 1370 1371 case SPIDER_NET_GIPSINT: 1372 show_error = 0; 1373 break; 1374 1375 case SPIDER_NET_GPWOPCMPINT: 1376 /* PHY write operation completed */ 1377 show_error = 0; 1378 break; 1379 case SPIDER_NET_GPROPCMPINT: 1380 /* PHY read operation completed */ 1381 /* we don't use semaphores, as we poll for the completion 1382 * of the read operation in spider_net_read_phy. Should take 1383 * about 50 us */ 1384 show_error = 0; 1385 break; 1386 case SPIDER_NET_GPWFFINT: 1387 /* PHY command queue full */ 1388 if (netif_msg_intr(card)) 1389 dev_err(&card->netdev->dev, "PHY write queue full\n"); 1390 show_error = 0; 1391 break; 1392 1393 /* case SPIDER_NET_GRMDADRINT: not used. print a message */ 1394 /* case SPIDER_NET_GRMARPINT: not used. print a message */ 1395 /* case SPIDER_NET_GRMMPINT: not used. print a message */ 1396 1397 case SPIDER_NET_GDTDEN0INT: 1398 /* someone has set TX_DMA_EN to 0 */ 1399 show_error = 0; 1400 break; 1401 1402 case SPIDER_NET_GDDDEN0INT: /* fallthrough */ 1403 case SPIDER_NET_GDCDEN0INT: /* fallthrough */ 1404 case SPIDER_NET_GDBDEN0INT: /* fallthrough */ 1405 case SPIDER_NET_GDADEN0INT: 1406 /* someone has set RX_DMA_EN to 0 */ 1407 show_error = 0; 1408 break; 1409 1410 /* RX interrupts */ 1411 case SPIDER_NET_GDDFDCINT: 1412 case SPIDER_NET_GDCFDCINT: 1413 case SPIDER_NET_GDBFDCINT: 1414 case SPIDER_NET_GDAFDCINT: 1415 /* case SPIDER_NET_GDNMINT: not used. print a message */ 1416 /* case SPIDER_NET_GCNMINT: not used. print a message */ 1417 /* case SPIDER_NET_GBNMINT: not used. print a message */ 1418 /* case SPIDER_NET_GANMINT: not used. print a message */ 1419 /* case SPIDER_NET_GRFNMINT: not used. print a message */ 1420 show_error = 0; 1421 break; 1422 1423 /* TX interrupts */ 1424 case SPIDER_NET_GDTFDCINT: 1425 show_error = 0; 1426 break; 1427 case SPIDER_NET_GTTEDINT: 1428 show_error = 0; 1429 break; 1430 case SPIDER_NET_GDTDCEINT: 1431 /* chain end. If a descriptor should be sent, kick off 1432 * tx dma 1433 if (card->tx_chain.tail != card->tx_chain.head) 1434 spider_net_kick_tx_dma(card); 1435 */ 1436 show_error = 0; 1437 break; 1438 1439 /* case SPIDER_NET_G1TMCNTINT: not used. print a message */ 1440 /* case SPIDER_NET_GFREECNTINT: not used. print a message */ 1441 } 1442 1443 /* check GHIINT1STS ************************************/ 1444 if (error_reg1) 1445 for (i = 0; i < 32; i++) 1446 if (error_reg1 & (1<<i)) 1447 switch (i) 1448 { 1449 case SPIDER_NET_GTMFLLINT: 1450 /* TX RAM full may happen on a usual case. 1451 * Logging is not needed. */ 1452 show_error = 0; 1453 break; 1454 case SPIDER_NET_GRFDFLLINT: /* fallthrough */ 1455 case SPIDER_NET_GRFCFLLINT: /* fallthrough */ 1456 case SPIDER_NET_GRFBFLLINT: /* fallthrough */ 1457 case SPIDER_NET_GRFAFLLINT: /* fallthrough */ 1458 case SPIDER_NET_GRMFLLINT: 1459 /* Could happen when rx chain is full */ 1460 if (card->ignore_rx_ramfull == 0) { 1461 card->ignore_rx_ramfull = 1; 1462 spider_net_resync_head_ptr(card); 1463 spider_net_refill_rx_chain(card); 1464 spider_net_enable_rxdmac(card); 1465 card->num_rx_ints ++; 1466 napi_schedule(&card->napi); 1467 } 1468 show_error = 0; 1469 break; 1470 1471 /* case SPIDER_NET_GTMSHTINT: problem, print a message */ 1472 case SPIDER_NET_GDTINVDINT: 1473 /* allrighty. tx from previous descr ok */ 1474 show_error = 0; 1475 break; 1476 1477 /* chain end */ 1478 case SPIDER_NET_GDDDCEINT: /* fallthrough */ 1479 case SPIDER_NET_GDCDCEINT: /* fallthrough */ 1480 case SPIDER_NET_GDBDCEINT: /* fallthrough */ 1481 case SPIDER_NET_GDADCEINT: 1482 spider_net_resync_head_ptr(card); 1483 spider_net_refill_rx_chain(card); 1484 spider_net_enable_rxdmac(card); 1485 card->num_rx_ints ++; 1486 napi_schedule(&card->napi); 1487 show_error = 0; 1488 break; 1489 1490 /* invalid descriptor */ 1491 case SPIDER_NET_GDDINVDINT: /* fallthrough */ 1492 case SPIDER_NET_GDCINVDINT: /* fallthrough */ 1493 case SPIDER_NET_GDBINVDINT: /* fallthrough */ 1494 case SPIDER_NET_GDAINVDINT: 1495 /* Could happen when rx chain is full */ 1496 spider_net_resync_head_ptr(card); 1497 spider_net_refill_rx_chain(card); 1498 spider_net_enable_rxdmac(card); 1499 card->num_rx_ints ++; 1500 napi_schedule(&card->napi); 1501 show_error = 0; 1502 break; 1503 1504 /* case SPIDER_NET_GDTRSERINT: problem, print a message */ 1505 /* case SPIDER_NET_GDDRSERINT: problem, print a message */ 1506 /* case SPIDER_NET_GDCRSERINT: problem, print a message */ 1507 /* case SPIDER_NET_GDBRSERINT: problem, print a message */ 1508 /* case SPIDER_NET_GDARSERINT: problem, print a message */ 1509 /* case SPIDER_NET_GDSERINT: problem, print a message */ 1510 /* case SPIDER_NET_GDTPTERINT: problem, print a message */ 1511 /* case SPIDER_NET_GDDPTERINT: problem, print a message */ 1512 /* case SPIDER_NET_GDCPTERINT: problem, print a message */ 1513 /* case SPIDER_NET_GDBPTERINT: problem, print a message */ 1514 /* case SPIDER_NET_GDAPTERINT: problem, print a message */ 1515 default: 1516 show_error = 1; 1517 break; 1518 } 1519 1520 /* check GHIINT2STS ************************************/ 1521 if (error_reg2) 1522 for (i = 0; i < 32; i++) 1523 if (error_reg2 & (1<<i)) 1524 switch (i) 1525 { 1526 /* there is nothing we can (want to) do at this time. Log a 1527 * message, we can switch on and off the specific values later on 1528 case SPIDER_NET_GPROPERINT: 1529 case SPIDER_NET_GMCTCRSNGINT: 1530 case SPIDER_NET_GMCTLCOLINT: 1531 case SPIDER_NET_GMCTTMOTINT: 1532 case SPIDER_NET_GMCRCAERINT: 1533 case SPIDER_NET_GMCRCALERINT: 1534 case SPIDER_NET_GMCRALNERINT: 1535 case SPIDER_NET_GMCROVRINT: 1536 case SPIDER_NET_GMCRRNTINT: 1537 case SPIDER_NET_GMCRRXERINT: 1538 case SPIDER_NET_GTITCSERINT: 1539 case SPIDER_NET_GTIFMTERINT: 1540 case SPIDER_NET_GTIPKTRVKINT: 1541 case SPIDER_NET_GTISPINGINT: 1542 case SPIDER_NET_GTISADNGINT: 1543 case SPIDER_NET_GTISPDNGINT: 1544 case SPIDER_NET_GRIFMTERINT: 1545 case SPIDER_NET_GRIPKTRVKINT: 1546 case SPIDER_NET_GRISPINGINT: 1547 case SPIDER_NET_GRISADNGINT: 1548 case SPIDER_NET_GRISPDNGINT: 1549 break; 1550 */ 1551 default: 1552 break; 1553 } 1554 1555 if ((show_error) && (netif_msg_intr(card)) && net_ratelimit()) 1556 dev_err(&card->netdev->dev, "Error interrupt, GHIINT0STS = 0x%08x, " 1557 "GHIINT1STS = 0x%08x, GHIINT2STS = 0x%08x\n", 1558 status_reg, error_reg1, error_reg2); 1559 1560 /* clear interrupt sources */ 1561 spider_net_write_reg(card, SPIDER_NET_GHIINT1STS, error_reg1); 1562 spider_net_write_reg(card, SPIDER_NET_GHIINT2STS, error_reg2); 1563 } 1564 1565 /** 1566 * spider_net_interrupt - interrupt handler for spider_net 1567 * @irq: interrupt number 1568 * @ptr: pointer to net_device 1569 * 1570 * returns IRQ_HANDLED, if interrupt was for driver, or IRQ_NONE, if no 1571 * interrupt found raised by card. 1572 * 1573 * This is the interrupt handler, that turns off 1574 * interrupts for this device and makes the stack poll the driver 1575 */ 1576 static irqreturn_t 1577 spider_net_interrupt(int irq, void *ptr) 1578 { 1579 struct net_device *netdev = ptr; 1580 struct spider_net_card *card = netdev_priv(netdev); 1581 u32 status_reg, error_reg1, error_reg2; 1582 1583 status_reg = spider_net_read_reg(card, SPIDER_NET_GHIINT0STS); 1584 error_reg1 = spider_net_read_reg(card, SPIDER_NET_GHIINT1STS); 1585 error_reg2 = spider_net_read_reg(card, SPIDER_NET_GHIINT2STS); 1586 1587 if (!(status_reg & SPIDER_NET_INT0_MASK_VALUE) && 1588 !(error_reg1 & SPIDER_NET_INT1_MASK_VALUE) && 1589 !(error_reg2 & SPIDER_NET_INT2_MASK_VALUE)) 1590 return IRQ_NONE; 1591 1592 if (status_reg & SPIDER_NET_RXINT ) { 1593 spider_net_rx_irq_off(card); 1594 napi_schedule(&card->napi); 1595 card->num_rx_ints ++; 1596 } 1597 if (status_reg & SPIDER_NET_TXINT) 1598 napi_schedule(&card->napi); 1599 1600 if (status_reg & SPIDER_NET_LINKINT) 1601 spider_net_link_reset(netdev); 1602 1603 if (status_reg & SPIDER_NET_ERRINT ) 1604 spider_net_handle_error_irq(card, status_reg, 1605 error_reg1, error_reg2); 1606 1607 /* clear interrupt sources */ 1608 spider_net_write_reg(card, SPIDER_NET_GHIINT0STS, status_reg); 1609 1610 return IRQ_HANDLED; 1611 } 1612 1613 #ifdef CONFIG_NET_POLL_CONTROLLER 1614 /** 1615 * spider_net_poll_controller - artificial interrupt for netconsole etc. 1616 * @netdev: interface device structure 1617 * 1618 * see Documentation/networking/netconsole.rst 1619 */ 1620 static void 1621 spider_net_poll_controller(struct net_device *netdev) 1622 { 1623 disable_irq(netdev->irq); 1624 spider_net_interrupt(netdev->irq, netdev); 1625 enable_irq(netdev->irq); 1626 } 1627 #endif /* CONFIG_NET_POLL_CONTROLLER */ 1628 1629 /** 1630 * spider_net_enable_interrupts - enable interrupts 1631 * @card: card structure 1632 * 1633 * spider_net_enable_interrupt enables several interrupts 1634 */ 1635 static void 1636 spider_net_enable_interrupts(struct spider_net_card *card) 1637 { 1638 spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, 1639 SPIDER_NET_INT0_MASK_VALUE); 1640 spider_net_write_reg(card, SPIDER_NET_GHIINT1MSK, 1641 SPIDER_NET_INT1_MASK_VALUE); 1642 spider_net_write_reg(card, SPIDER_NET_GHIINT2MSK, 1643 SPIDER_NET_INT2_MASK_VALUE); 1644 } 1645 1646 /** 1647 * spider_net_disable_interrupts - disable interrupts 1648 * @card: card structure 1649 * 1650 * spider_net_disable_interrupts disables all the interrupts 1651 */ 1652 static void 1653 spider_net_disable_interrupts(struct spider_net_card *card) 1654 { 1655 spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, 0); 1656 spider_net_write_reg(card, SPIDER_NET_GHIINT1MSK, 0); 1657 spider_net_write_reg(card, SPIDER_NET_GHIINT2MSK, 0); 1658 spider_net_write_reg(card, SPIDER_NET_GMACINTEN, 0); 1659 } 1660 1661 /** 1662 * spider_net_init_card - initializes the card 1663 * @card: card structure 1664 * 1665 * spider_net_init_card initializes the card so that other registers can 1666 * be used 1667 */ 1668 static void 1669 spider_net_init_card(struct spider_net_card *card) 1670 { 1671 spider_net_write_reg(card, SPIDER_NET_CKRCTRL, 1672 SPIDER_NET_CKRCTRL_STOP_VALUE); 1673 1674 spider_net_write_reg(card, SPIDER_NET_CKRCTRL, 1675 SPIDER_NET_CKRCTRL_RUN_VALUE); 1676 1677 /* trigger ETOMOD signal */ 1678 spider_net_write_reg(card, SPIDER_NET_GMACOPEMD, 1679 spider_net_read_reg(card, SPIDER_NET_GMACOPEMD) | 0x4); 1680 1681 spider_net_disable_interrupts(card); 1682 } 1683 1684 /** 1685 * spider_net_enable_card - enables the card by setting all kinds of regs 1686 * @card: card structure 1687 * 1688 * spider_net_enable_card sets a lot of SMMIO registers to enable the device 1689 */ 1690 static void 1691 spider_net_enable_card(struct spider_net_card *card) 1692 { 1693 int i; 1694 /* the following array consists of (register),(value) pairs 1695 * that are set in this function. A register of 0 ends the list */ 1696 u32 regs[][2] = { 1697 { SPIDER_NET_GRESUMINTNUM, 0 }, 1698 { SPIDER_NET_GREINTNUM, 0 }, 1699 1700 /* set interrupt frame number registers */ 1701 /* clear the single DMA engine registers first */ 1702 { SPIDER_NET_GFAFRMNUM, SPIDER_NET_GFXFRAMES_VALUE }, 1703 { SPIDER_NET_GFBFRMNUM, SPIDER_NET_GFXFRAMES_VALUE }, 1704 { SPIDER_NET_GFCFRMNUM, SPIDER_NET_GFXFRAMES_VALUE }, 1705 { SPIDER_NET_GFDFRMNUM, SPIDER_NET_GFXFRAMES_VALUE }, 1706 /* then set, what we really need */ 1707 { SPIDER_NET_GFFRMNUM, SPIDER_NET_FRAMENUM_VALUE }, 1708 1709 /* timer counter registers and stuff */ 1710 { SPIDER_NET_GFREECNNUM, 0 }, 1711 { SPIDER_NET_GONETIMENUM, 0 }, 1712 { SPIDER_NET_GTOUTFRMNUM, 0 }, 1713 1714 /* RX mode setting */ 1715 { SPIDER_NET_GRXMDSET, SPIDER_NET_RXMODE_VALUE }, 1716 /* TX mode setting */ 1717 { SPIDER_NET_GTXMDSET, SPIDER_NET_TXMODE_VALUE }, 1718 /* IPSEC mode setting */ 1719 { SPIDER_NET_GIPSECINIT, SPIDER_NET_IPSECINIT_VALUE }, 1720 1721 { SPIDER_NET_GFTRESTRT, SPIDER_NET_RESTART_VALUE }, 1722 1723 { SPIDER_NET_GMRWOLCTRL, 0 }, 1724 { SPIDER_NET_GTESTMD, 0x10000000 }, 1725 { SPIDER_NET_GTTQMSK, 0x00400040 }, 1726 1727 { SPIDER_NET_GMACINTEN, 0 }, 1728 1729 /* flow control stuff */ 1730 { SPIDER_NET_GMACAPAUSE, SPIDER_NET_MACAPAUSE_VALUE }, 1731 { SPIDER_NET_GMACTXPAUSE, SPIDER_NET_TXPAUSE_VALUE }, 1732 1733 { SPIDER_NET_GMACBSTLMT, SPIDER_NET_BURSTLMT_VALUE }, 1734 { 0, 0} 1735 }; 1736 1737 i = 0; 1738 while (regs[i][0]) { 1739 spider_net_write_reg(card, regs[i][0], regs[i][1]); 1740 i++; 1741 } 1742 1743 /* clear unicast filter table entries 1 to 14 */ 1744 for (i = 1; i <= 14; i++) { 1745 spider_net_write_reg(card, 1746 SPIDER_NET_GMRUAFILnR + i * 8, 1747 0x00080000); 1748 spider_net_write_reg(card, 1749 SPIDER_NET_GMRUAFILnR + i * 8 + 4, 1750 0x00000000); 1751 } 1752 1753 spider_net_write_reg(card, SPIDER_NET_GMRUA0FIL15R, 0x08080000); 1754 1755 spider_net_write_reg(card, SPIDER_NET_ECMODE, SPIDER_NET_ECMODE_VALUE); 1756 1757 /* set chain tail address for RX chains and 1758 * enable DMA */ 1759 spider_net_enable_rxchtails(card); 1760 spider_net_enable_rxdmac(card); 1761 1762 spider_net_write_reg(card, SPIDER_NET_GRXDMAEN, SPIDER_NET_WOL_VALUE); 1763 1764 spider_net_write_reg(card, SPIDER_NET_GMACLENLMT, 1765 SPIDER_NET_LENLMT_VALUE); 1766 spider_net_write_reg(card, SPIDER_NET_GMACOPEMD, 1767 SPIDER_NET_OPMODE_VALUE); 1768 1769 spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR, 1770 SPIDER_NET_GDTBSTA); 1771 } 1772 1773 /** 1774 * spider_net_download_firmware - loads firmware into the adapter 1775 * @card: card structure 1776 * @firmware_ptr: pointer to firmware data 1777 * 1778 * spider_net_download_firmware loads the firmware data into the 1779 * adapter. It assumes the length etc. to be allright. 1780 */ 1781 static int 1782 spider_net_download_firmware(struct spider_net_card *card, 1783 const void *firmware_ptr) 1784 { 1785 int sequencer, i; 1786 const u32 *fw_ptr = firmware_ptr; 1787 1788 /* stop sequencers */ 1789 spider_net_write_reg(card, SPIDER_NET_GSINIT, 1790 SPIDER_NET_STOP_SEQ_VALUE); 1791 1792 for (sequencer = 0; sequencer < SPIDER_NET_FIRMWARE_SEQS; 1793 sequencer++) { 1794 spider_net_write_reg(card, 1795 SPIDER_NET_GSnPRGADR + sequencer * 8, 0); 1796 for (i = 0; i < SPIDER_NET_FIRMWARE_SEQWORDS; i++) { 1797 spider_net_write_reg(card, SPIDER_NET_GSnPRGDAT + 1798 sequencer * 8, *fw_ptr); 1799 fw_ptr++; 1800 } 1801 } 1802 1803 if (spider_net_read_reg(card, SPIDER_NET_GSINIT)) 1804 return -EIO; 1805 1806 spider_net_write_reg(card, SPIDER_NET_GSINIT, 1807 SPIDER_NET_RUN_SEQ_VALUE); 1808 1809 return 0; 1810 } 1811 1812 /** 1813 * spider_net_init_firmware - reads in firmware parts 1814 * @card: card structure 1815 * 1816 * Returns 0 on success, <0 on failure 1817 * 1818 * spider_net_init_firmware opens the sequencer firmware and does some basic 1819 * checks. This function opens and releases the firmware structure. A call 1820 * to download the firmware is performed before the release. 1821 * 1822 * Firmware format 1823 * =============== 1824 * spider_fw.bin is expected to be a file containing 6*1024*4 bytes, 4k being 1825 * the program for each sequencer. Use the command 1826 * tail -q -n +2 Seq_code1_0x088.txt Seq_code2_0x090.txt \ 1827 * Seq_code3_0x098.txt Seq_code4_0x0A0.txt Seq_code5_0x0A8.txt \ 1828 * Seq_code6_0x0B0.txt | xxd -r -p -c4 > spider_fw.bin 1829 * 1830 * to generate spider_fw.bin, if you have sequencer programs with something 1831 * like the following contents for each sequencer: 1832 * <ONE LINE COMMENT> 1833 * <FIRST 4-BYTES-WORD FOR SEQUENCER> 1834 * <SECOND 4-BYTES-WORD FOR SEQUENCER> 1835 * ... 1836 * <1024th 4-BYTES-WORD FOR SEQUENCER> 1837 */ 1838 static int 1839 spider_net_init_firmware(struct spider_net_card *card) 1840 { 1841 struct firmware *firmware = NULL; 1842 struct device_node *dn; 1843 const u8 *fw_prop = NULL; 1844 int err = -ENOENT; 1845 int fw_size; 1846 1847 if (request_firmware((const struct firmware **)&firmware, 1848 SPIDER_NET_FIRMWARE_NAME, &card->pdev->dev) == 0) { 1849 if ( (firmware->size != SPIDER_NET_FIRMWARE_LEN) && 1850 netif_msg_probe(card) ) { 1851 dev_err(&card->netdev->dev, 1852 "Incorrect size of spidernet firmware in " \ 1853 "filesystem. Looking in host firmware...\n"); 1854 goto try_host_fw; 1855 } 1856 err = spider_net_download_firmware(card, firmware->data); 1857 1858 release_firmware(firmware); 1859 if (err) 1860 goto try_host_fw; 1861 1862 goto done; 1863 } 1864 1865 try_host_fw: 1866 dn = pci_device_to_OF_node(card->pdev); 1867 if (!dn) 1868 goto out_err; 1869 1870 fw_prop = of_get_property(dn, "firmware", &fw_size); 1871 if (!fw_prop) 1872 goto out_err; 1873 1874 if ( (fw_size != SPIDER_NET_FIRMWARE_LEN) && 1875 netif_msg_probe(card) ) { 1876 dev_err(&card->netdev->dev, 1877 "Incorrect size of spidernet firmware in host firmware\n"); 1878 goto done; 1879 } 1880 1881 err = spider_net_download_firmware(card, fw_prop); 1882 1883 done: 1884 return err; 1885 out_err: 1886 if (netif_msg_probe(card)) 1887 dev_err(&card->netdev->dev, 1888 "Couldn't find spidernet firmware in filesystem " \ 1889 "or host firmware\n"); 1890 return err; 1891 } 1892 1893 /** 1894 * spider_net_open - called upon ifonfig up 1895 * @netdev: interface device structure 1896 * 1897 * returns 0 on success, <0 on failure 1898 * 1899 * spider_net_open allocates all the descriptors and memory needed for 1900 * operation, sets up multicast list and enables interrupts 1901 */ 1902 int 1903 spider_net_open(struct net_device *netdev) 1904 { 1905 struct spider_net_card *card = netdev_priv(netdev); 1906 int result; 1907 1908 result = spider_net_init_firmware(card); 1909 if (result) 1910 goto init_firmware_failed; 1911 1912 /* start probing with copper */ 1913 card->aneg_count = 0; 1914 card->medium = BCM54XX_COPPER; 1915 spider_net_setup_aneg(card); 1916 if (card->phy.def->phy_id) 1917 mod_timer(&card->aneg_timer, jiffies + SPIDER_NET_ANEG_TIMER); 1918 1919 result = spider_net_init_chain(card, &card->tx_chain); 1920 if (result) 1921 goto alloc_tx_failed; 1922 card->low_watermark = NULL; 1923 1924 result = spider_net_init_chain(card, &card->rx_chain); 1925 if (result) 1926 goto alloc_rx_failed; 1927 1928 /* Allocate rx skbs */ 1929 result = spider_net_alloc_rx_skbs(card); 1930 if (result) 1931 goto alloc_skbs_failed; 1932 1933 spider_net_set_multi(netdev); 1934 1935 /* further enhancement: setup hw vlan, if needed */ 1936 1937 result = -EBUSY; 1938 if (request_irq(netdev->irq, spider_net_interrupt, 1939 IRQF_SHARED, netdev->name, netdev)) 1940 goto register_int_failed; 1941 1942 spider_net_enable_card(card); 1943 1944 netif_start_queue(netdev); 1945 netif_carrier_on(netdev); 1946 napi_enable(&card->napi); 1947 1948 spider_net_enable_interrupts(card); 1949 1950 return 0; 1951 1952 register_int_failed: 1953 spider_net_free_rx_chain_contents(card); 1954 alloc_skbs_failed: 1955 spider_net_free_chain(card, &card->rx_chain); 1956 alloc_rx_failed: 1957 spider_net_free_chain(card, &card->tx_chain); 1958 alloc_tx_failed: 1959 del_timer_sync(&card->aneg_timer); 1960 init_firmware_failed: 1961 return result; 1962 } 1963 1964 /** 1965 * spider_net_link_phy 1966 * @data: used for pointer to card structure 1967 * 1968 */ 1969 static void spider_net_link_phy(struct timer_list *t) 1970 { 1971 struct spider_net_card *card = from_timer(card, t, aneg_timer); 1972 struct mii_phy *phy = &card->phy; 1973 1974 /* if link didn't come up after SPIDER_NET_ANEG_TIMEOUT tries, setup phy again */ 1975 if (card->aneg_count > SPIDER_NET_ANEG_TIMEOUT) { 1976 1977 pr_debug("%s: link is down trying to bring it up\n", 1978 card->netdev->name); 1979 1980 switch (card->medium) { 1981 case BCM54XX_COPPER: 1982 /* enable fiber with autonegotiation first */ 1983 if (phy->def->ops->enable_fiber) 1984 phy->def->ops->enable_fiber(phy, 1); 1985 card->medium = BCM54XX_FIBER; 1986 break; 1987 1988 case BCM54XX_FIBER: 1989 /* fiber didn't come up, try to disable fiber autoneg */ 1990 if (phy->def->ops->enable_fiber) 1991 phy->def->ops->enable_fiber(phy, 0); 1992 card->medium = BCM54XX_UNKNOWN; 1993 break; 1994 1995 case BCM54XX_UNKNOWN: 1996 /* copper, fiber with and without failed, 1997 * retry from beginning */ 1998 spider_net_setup_aneg(card); 1999 card->medium = BCM54XX_COPPER; 2000 break; 2001 } 2002 2003 card->aneg_count = 0; 2004 mod_timer(&card->aneg_timer, jiffies + SPIDER_NET_ANEG_TIMER); 2005 return; 2006 } 2007 2008 /* link still not up, try again later */ 2009 if (!(phy->def->ops->poll_link(phy))) { 2010 card->aneg_count++; 2011 mod_timer(&card->aneg_timer, jiffies + SPIDER_NET_ANEG_TIMER); 2012 return; 2013 } 2014 2015 /* link came up, get abilities */ 2016 phy->def->ops->read_link(phy); 2017 2018 spider_net_write_reg(card, SPIDER_NET_GMACST, 2019 spider_net_read_reg(card, SPIDER_NET_GMACST)); 2020 spider_net_write_reg(card, SPIDER_NET_GMACINTEN, 0x4); 2021 2022 if (phy->speed == 1000) 2023 spider_net_write_reg(card, SPIDER_NET_GMACMODE, 0x00000001); 2024 else 2025 spider_net_write_reg(card, SPIDER_NET_GMACMODE, 0); 2026 2027 card->aneg_count = 0; 2028 2029 pr_info("%s: link up, %i Mbps, %s-duplex %sautoneg.\n", 2030 card->netdev->name, phy->speed, 2031 phy->duplex == 1 ? "Full" : "Half", 2032 phy->autoneg == 1 ? "" : "no "); 2033 } 2034 2035 /** 2036 * spider_net_setup_phy - setup PHY 2037 * @card: card structure 2038 * 2039 * returns 0 on success, <0 on failure 2040 * 2041 * spider_net_setup_phy is used as part of spider_net_probe. 2042 **/ 2043 static int 2044 spider_net_setup_phy(struct spider_net_card *card) 2045 { 2046 struct mii_phy *phy = &card->phy; 2047 2048 spider_net_write_reg(card, SPIDER_NET_GDTDMASEL, 2049 SPIDER_NET_DMASEL_VALUE); 2050 spider_net_write_reg(card, SPIDER_NET_GPCCTRL, 2051 SPIDER_NET_PHY_CTRL_VALUE); 2052 2053 phy->dev = card->netdev; 2054 phy->mdio_read = spider_net_read_phy; 2055 phy->mdio_write = spider_net_write_phy; 2056 2057 for (phy->mii_id = 1; phy->mii_id <= 31; phy->mii_id++) { 2058 unsigned short id; 2059 id = spider_net_read_phy(card->netdev, phy->mii_id, MII_BMSR); 2060 if (id != 0x0000 && id != 0xffff) { 2061 if (!sungem_phy_probe(phy, phy->mii_id)) { 2062 pr_info("Found %s.\n", phy->def->name); 2063 break; 2064 } 2065 } 2066 } 2067 2068 return 0; 2069 } 2070 2071 /** 2072 * spider_net_workaround_rxramfull - work around firmware bug 2073 * @card: card structure 2074 * 2075 * no return value 2076 **/ 2077 static void 2078 spider_net_workaround_rxramfull(struct spider_net_card *card) 2079 { 2080 int i, sequencer = 0; 2081 2082 /* cancel reset */ 2083 spider_net_write_reg(card, SPIDER_NET_CKRCTRL, 2084 SPIDER_NET_CKRCTRL_RUN_VALUE); 2085 2086 /* empty sequencer data */ 2087 for (sequencer = 0; sequencer < SPIDER_NET_FIRMWARE_SEQS; 2088 sequencer++) { 2089 spider_net_write_reg(card, SPIDER_NET_GSnPRGADR + 2090 sequencer * 8, 0x0); 2091 for (i = 0; i < SPIDER_NET_FIRMWARE_SEQWORDS; i++) { 2092 spider_net_write_reg(card, SPIDER_NET_GSnPRGDAT + 2093 sequencer * 8, 0x0); 2094 } 2095 } 2096 2097 /* set sequencer operation */ 2098 spider_net_write_reg(card, SPIDER_NET_GSINIT, 0x000000fe); 2099 2100 /* reset */ 2101 spider_net_write_reg(card, SPIDER_NET_CKRCTRL, 2102 SPIDER_NET_CKRCTRL_STOP_VALUE); 2103 } 2104 2105 /** 2106 * spider_net_stop - called upon ifconfig down 2107 * @netdev: interface device structure 2108 * 2109 * always returns 0 2110 */ 2111 int 2112 spider_net_stop(struct net_device *netdev) 2113 { 2114 struct spider_net_card *card = netdev_priv(netdev); 2115 2116 napi_disable(&card->napi); 2117 netif_carrier_off(netdev); 2118 netif_stop_queue(netdev); 2119 del_timer_sync(&card->tx_timer); 2120 del_timer_sync(&card->aneg_timer); 2121 2122 spider_net_disable_interrupts(card); 2123 2124 free_irq(netdev->irq, netdev); 2125 2126 spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR, 2127 SPIDER_NET_DMA_TX_FEND_VALUE); 2128 2129 /* turn off DMA, force end */ 2130 spider_net_disable_rxdmac(card); 2131 2132 /* release chains */ 2133 spider_net_release_tx_chain(card, 1); 2134 spider_net_free_rx_chain_contents(card); 2135 2136 spider_net_free_chain(card, &card->tx_chain); 2137 spider_net_free_chain(card, &card->rx_chain); 2138 2139 return 0; 2140 } 2141 2142 /** 2143 * spider_net_tx_timeout_task - task scheduled by the watchdog timeout 2144 * function (to be called not under interrupt status) 2145 * @data: data, is interface device structure 2146 * 2147 * called as task when tx hangs, resets interface (if interface is up) 2148 */ 2149 static void 2150 spider_net_tx_timeout_task(struct work_struct *work) 2151 { 2152 struct spider_net_card *card = 2153 container_of(work, struct spider_net_card, tx_timeout_task); 2154 struct net_device *netdev = card->netdev; 2155 2156 if (!(netdev->flags & IFF_UP)) 2157 goto out; 2158 2159 netif_device_detach(netdev); 2160 spider_net_stop(netdev); 2161 2162 spider_net_workaround_rxramfull(card); 2163 spider_net_init_card(card); 2164 2165 if (spider_net_setup_phy(card)) 2166 goto out; 2167 2168 spider_net_open(netdev); 2169 spider_net_kick_tx_dma(card); 2170 netif_device_attach(netdev); 2171 2172 out: 2173 atomic_dec(&card->tx_timeout_task_counter); 2174 } 2175 2176 /** 2177 * spider_net_tx_timeout - called when the tx timeout watchdog kicks in. 2178 * @netdev: interface device structure 2179 * 2180 * called, if tx hangs. Schedules a task that resets the interface 2181 */ 2182 static void 2183 spider_net_tx_timeout(struct net_device *netdev, unsigned int txqueue) 2184 { 2185 struct spider_net_card *card; 2186 2187 card = netdev_priv(netdev); 2188 atomic_inc(&card->tx_timeout_task_counter); 2189 if (netdev->flags & IFF_UP) 2190 schedule_work(&card->tx_timeout_task); 2191 else 2192 atomic_dec(&card->tx_timeout_task_counter); 2193 card->spider_stats.tx_timeouts++; 2194 } 2195 2196 static const struct net_device_ops spider_net_ops = { 2197 .ndo_open = spider_net_open, 2198 .ndo_stop = spider_net_stop, 2199 .ndo_start_xmit = spider_net_xmit, 2200 .ndo_set_rx_mode = spider_net_set_multi, 2201 .ndo_set_mac_address = spider_net_set_mac, 2202 .ndo_do_ioctl = spider_net_do_ioctl, 2203 .ndo_tx_timeout = spider_net_tx_timeout, 2204 .ndo_validate_addr = eth_validate_addr, 2205 /* HW VLAN */ 2206 #ifdef CONFIG_NET_POLL_CONTROLLER 2207 /* poll controller */ 2208 .ndo_poll_controller = spider_net_poll_controller, 2209 #endif /* CONFIG_NET_POLL_CONTROLLER */ 2210 }; 2211 2212 /** 2213 * spider_net_setup_netdev_ops - initialization of net_device operations 2214 * @netdev: net_device structure 2215 * 2216 * fills out function pointers in the net_device structure 2217 */ 2218 static void 2219 spider_net_setup_netdev_ops(struct net_device *netdev) 2220 { 2221 netdev->netdev_ops = &spider_net_ops; 2222 netdev->watchdog_timeo = SPIDER_NET_WATCHDOG_TIMEOUT; 2223 /* ethtool ops */ 2224 netdev->ethtool_ops = &spider_net_ethtool_ops; 2225 } 2226 2227 /** 2228 * spider_net_setup_netdev - initialization of net_device 2229 * @card: card structure 2230 * 2231 * Returns 0 on success or <0 on failure 2232 * 2233 * spider_net_setup_netdev initializes the net_device structure 2234 **/ 2235 static int 2236 spider_net_setup_netdev(struct spider_net_card *card) 2237 { 2238 int result; 2239 struct net_device *netdev = card->netdev; 2240 struct device_node *dn; 2241 struct sockaddr addr; 2242 const u8 *mac; 2243 2244 SET_NETDEV_DEV(netdev, &card->pdev->dev); 2245 2246 pci_set_drvdata(card->pdev, netdev); 2247 2248 timer_setup(&card->tx_timer, spider_net_cleanup_tx_ring, 0); 2249 netdev->irq = card->pdev->irq; 2250 2251 card->aneg_count = 0; 2252 timer_setup(&card->aneg_timer, spider_net_link_phy, 0); 2253 2254 netif_napi_add(netdev, &card->napi, 2255 spider_net_poll, SPIDER_NET_NAPI_WEIGHT); 2256 2257 spider_net_setup_netdev_ops(netdev); 2258 2259 netdev->hw_features = NETIF_F_RXCSUM | NETIF_F_IP_CSUM; 2260 if (SPIDER_NET_RX_CSUM_DEFAULT) 2261 netdev->features |= NETIF_F_RXCSUM; 2262 netdev->features |= NETIF_F_IP_CSUM | NETIF_F_LLTX; 2263 /* some time: NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX | 2264 * NETIF_F_HW_VLAN_CTAG_FILTER */ 2265 2266 /* MTU range: 64 - 2294 */ 2267 netdev->min_mtu = SPIDER_NET_MIN_MTU; 2268 netdev->max_mtu = SPIDER_NET_MAX_MTU; 2269 2270 netdev->irq = card->pdev->irq; 2271 card->num_rx_ints = 0; 2272 card->ignore_rx_ramfull = 0; 2273 2274 dn = pci_device_to_OF_node(card->pdev); 2275 if (!dn) 2276 return -EIO; 2277 2278 mac = of_get_property(dn, "local-mac-address", NULL); 2279 if (!mac) 2280 return -EIO; 2281 memcpy(addr.sa_data, mac, ETH_ALEN); 2282 2283 result = spider_net_set_mac(netdev, &addr); 2284 if ((result) && (netif_msg_probe(card))) 2285 dev_err(&card->netdev->dev, 2286 "Failed to set MAC address: %i\n", result); 2287 2288 result = register_netdev(netdev); 2289 if (result) { 2290 if (netif_msg_probe(card)) 2291 dev_err(&card->netdev->dev, 2292 "Couldn't register net_device: %i\n", result); 2293 return result; 2294 } 2295 2296 if (netif_msg_probe(card)) 2297 pr_info("Initialized device %s.\n", netdev->name); 2298 2299 return 0; 2300 } 2301 2302 /** 2303 * spider_net_alloc_card - allocates net_device and card structure 2304 * 2305 * returns the card structure or NULL in case of errors 2306 * 2307 * the card and net_device structures are linked to each other 2308 */ 2309 static struct spider_net_card * 2310 spider_net_alloc_card(void) 2311 { 2312 struct net_device *netdev; 2313 struct spider_net_card *card; 2314 2315 netdev = alloc_etherdev(struct_size(card, darray, 2316 tx_descriptors + rx_descriptors)); 2317 if (!netdev) 2318 return NULL; 2319 2320 card = netdev_priv(netdev); 2321 card->netdev = netdev; 2322 card->msg_enable = SPIDER_NET_DEFAULT_MSG; 2323 INIT_WORK(&card->tx_timeout_task, spider_net_tx_timeout_task); 2324 init_waitqueue_head(&card->waitq); 2325 atomic_set(&card->tx_timeout_task_counter, 0); 2326 2327 card->rx_chain.num_desc = rx_descriptors; 2328 card->rx_chain.ring = card->darray; 2329 card->tx_chain.num_desc = tx_descriptors; 2330 card->tx_chain.ring = card->darray + rx_descriptors; 2331 2332 return card; 2333 } 2334 2335 /** 2336 * spider_net_undo_pci_setup - releases PCI ressources 2337 * @card: card structure 2338 * 2339 * spider_net_undo_pci_setup releases the mapped regions 2340 */ 2341 static void 2342 spider_net_undo_pci_setup(struct spider_net_card *card) 2343 { 2344 iounmap(card->regs); 2345 pci_release_regions(card->pdev); 2346 } 2347 2348 /** 2349 * spider_net_setup_pci_dev - sets up the device in terms of PCI operations 2350 * @pdev: PCI device 2351 * 2352 * Returns the card structure or NULL if any errors occur 2353 * 2354 * spider_net_setup_pci_dev initializes pdev and together with the 2355 * functions called in spider_net_open configures the device so that 2356 * data can be transferred over it 2357 * The net_device structure is attached to the card structure, if the 2358 * function returns without error. 2359 **/ 2360 static struct spider_net_card * 2361 spider_net_setup_pci_dev(struct pci_dev *pdev) 2362 { 2363 struct spider_net_card *card; 2364 unsigned long mmio_start, mmio_len; 2365 2366 if (pci_enable_device(pdev)) { 2367 dev_err(&pdev->dev, "Couldn't enable PCI device\n"); 2368 return NULL; 2369 } 2370 2371 if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) { 2372 dev_err(&pdev->dev, 2373 "Couldn't find proper PCI device base address.\n"); 2374 goto out_disable_dev; 2375 } 2376 2377 if (pci_request_regions(pdev, spider_net_driver_name)) { 2378 dev_err(&pdev->dev, 2379 "Couldn't obtain PCI resources, aborting.\n"); 2380 goto out_disable_dev; 2381 } 2382 2383 pci_set_master(pdev); 2384 2385 card = spider_net_alloc_card(); 2386 if (!card) { 2387 dev_err(&pdev->dev, 2388 "Couldn't allocate net_device structure, aborting.\n"); 2389 goto out_release_regions; 2390 } 2391 card->pdev = pdev; 2392 2393 /* fetch base address and length of first resource */ 2394 mmio_start = pci_resource_start(pdev, 0); 2395 mmio_len = pci_resource_len(pdev, 0); 2396 2397 card->netdev->mem_start = mmio_start; 2398 card->netdev->mem_end = mmio_start + mmio_len; 2399 card->regs = ioremap(mmio_start, mmio_len); 2400 2401 if (!card->regs) { 2402 dev_err(&pdev->dev, 2403 "Couldn't obtain PCI resources, aborting.\n"); 2404 goto out_release_regions; 2405 } 2406 2407 return card; 2408 2409 out_release_regions: 2410 pci_release_regions(pdev); 2411 out_disable_dev: 2412 pci_disable_device(pdev); 2413 return NULL; 2414 } 2415 2416 /** 2417 * spider_net_probe - initialization of a device 2418 * @pdev: PCI device 2419 * @ent: entry in the device id list 2420 * 2421 * Returns 0 on success, <0 on failure 2422 * 2423 * spider_net_probe initializes pdev and registers a net_device 2424 * structure for it. After that, the device can be ifconfig'ed up 2425 **/ 2426 static int 2427 spider_net_probe(struct pci_dev *pdev, const struct pci_device_id *ent) 2428 { 2429 int err = -EIO; 2430 struct spider_net_card *card; 2431 2432 card = spider_net_setup_pci_dev(pdev); 2433 if (!card) 2434 goto out; 2435 2436 spider_net_workaround_rxramfull(card); 2437 spider_net_init_card(card); 2438 2439 err = spider_net_setup_phy(card); 2440 if (err) 2441 goto out_undo_pci; 2442 2443 err = spider_net_setup_netdev(card); 2444 if (err) 2445 goto out_undo_pci; 2446 2447 return 0; 2448 2449 out_undo_pci: 2450 spider_net_undo_pci_setup(card); 2451 free_netdev(card->netdev); 2452 out: 2453 return err; 2454 } 2455 2456 /** 2457 * spider_net_remove - removal of a device 2458 * @pdev: PCI device 2459 * 2460 * Returns 0 on success, <0 on failure 2461 * 2462 * spider_net_remove is called to remove the device and unregisters the 2463 * net_device 2464 **/ 2465 static void 2466 spider_net_remove(struct pci_dev *pdev) 2467 { 2468 struct net_device *netdev; 2469 struct spider_net_card *card; 2470 2471 netdev = pci_get_drvdata(pdev); 2472 card = netdev_priv(netdev); 2473 2474 wait_event(card->waitq, 2475 atomic_read(&card->tx_timeout_task_counter) == 0); 2476 2477 unregister_netdev(netdev); 2478 2479 /* switch off card */ 2480 spider_net_write_reg(card, SPIDER_NET_CKRCTRL, 2481 SPIDER_NET_CKRCTRL_STOP_VALUE); 2482 spider_net_write_reg(card, SPIDER_NET_CKRCTRL, 2483 SPIDER_NET_CKRCTRL_RUN_VALUE); 2484 2485 spider_net_undo_pci_setup(card); 2486 free_netdev(netdev); 2487 } 2488 2489 static struct pci_driver spider_net_driver = { 2490 .name = spider_net_driver_name, 2491 .id_table = spider_net_pci_tbl, 2492 .probe = spider_net_probe, 2493 .remove = spider_net_remove 2494 }; 2495 2496 /** 2497 * spider_net_init - init function when the driver is loaded 2498 * 2499 * spider_net_init registers the device driver 2500 */ 2501 static int __init spider_net_init(void) 2502 { 2503 printk(KERN_INFO "Spidernet version %s.\n", VERSION); 2504 2505 if (rx_descriptors < SPIDER_NET_RX_DESCRIPTORS_MIN) { 2506 rx_descriptors = SPIDER_NET_RX_DESCRIPTORS_MIN; 2507 pr_info("adjusting rx descriptors to %i.\n", rx_descriptors); 2508 } 2509 if (rx_descriptors > SPIDER_NET_RX_DESCRIPTORS_MAX) { 2510 rx_descriptors = SPIDER_NET_RX_DESCRIPTORS_MAX; 2511 pr_info("adjusting rx descriptors to %i.\n", rx_descriptors); 2512 } 2513 if (tx_descriptors < SPIDER_NET_TX_DESCRIPTORS_MIN) { 2514 tx_descriptors = SPIDER_NET_TX_DESCRIPTORS_MIN; 2515 pr_info("adjusting tx descriptors to %i.\n", tx_descriptors); 2516 } 2517 if (tx_descriptors > SPIDER_NET_TX_DESCRIPTORS_MAX) { 2518 tx_descriptors = SPIDER_NET_TX_DESCRIPTORS_MAX; 2519 pr_info("adjusting tx descriptors to %i.\n", tx_descriptors); 2520 } 2521 2522 return pci_register_driver(&spider_net_driver); 2523 } 2524 2525 /** 2526 * spider_net_cleanup - exit function when driver is unloaded 2527 * 2528 * spider_net_cleanup unregisters the device driver 2529 */ 2530 static void __exit spider_net_cleanup(void) 2531 { 2532 pci_unregister_driver(&spider_net_driver); 2533 } 2534 2535 module_init(spider_net_init); 2536 module_exit(spider_net_cleanup); 2537