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 * @hwdescr: 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 * sizeof(struct spider_net_hw_descr), 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 /* Set up the hardware pointers in each descriptor */ 318 descr = chain->ring; 319 hwdescr = chain->hwring; 320 buf = chain->dma_addr; 321 for (i=0; i < chain->num_desc; i++, descr++, hwdescr++) { 322 hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE; 323 hwdescr->next_descr_addr = 0; 324 325 descr->hwdescr = hwdescr; 326 descr->bus_addr = buf; 327 descr->next = descr + 1; 328 descr->prev = descr - 1; 329 330 buf += sizeof(struct spider_net_hw_descr); 331 } 332 /* do actual circular list */ 333 (descr-1)->next = chain->ring; 334 chain->ring->prev = descr-1; 335 336 spin_lock_init(&chain->lock); 337 chain->head = chain->ring; 338 chain->tail = chain->ring; 339 return 0; 340 } 341 342 /** 343 * spider_net_free_rx_chain_contents - frees descr contents in rx chain 344 * @card: card structure 345 * 346 * returns 0 on success, <0 on failure 347 */ 348 static void 349 spider_net_free_rx_chain_contents(struct spider_net_card *card) 350 { 351 struct spider_net_descr *descr; 352 353 descr = card->rx_chain.head; 354 do { 355 if (descr->skb) { 356 pci_unmap_single(card->pdev, descr->hwdescr->buf_addr, 357 SPIDER_NET_MAX_FRAME, 358 PCI_DMA_BIDIRECTIONAL); 359 dev_kfree_skb(descr->skb); 360 descr->skb = NULL; 361 } 362 descr = descr->next; 363 } while (descr != card->rx_chain.head); 364 } 365 366 /** 367 * spider_net_prepare_rx_descr - Reinitialize RX descriptor 368 * @card: card structure 369 * @descr: descriptor to re-init 370 * 371 * Return 0 on success, <0 on failure. 372 * 373 * Allocates a new rx skb, iommu-maps it and attaches it to the 374 * descriptor. Mark the descriptor as activated, ready-to-use. 375 */ 376 static int 377 spider_net_prepare_rx_descr(struct spider_net_card *card, 378 struct spider_net_descr *descr) 379 { 380 struct spider_net_hw_descr *hwdescr = descr->hwdescr; 381 dma_addr_t buf; 382 int offset; 383 int bufsize; 384 385 /* we need to round up the buffer size to a multiple of 128 */ 386 bufsize = (SPIDER_NET_MAX_FRAME + SPIDER_NET_RXBUF_ALIGN - 1) & 387 (~(SPIDER_NET_RXBUF_ALIGN - 1)); 388 389 /* and we need to have it 128 byte aligned, therefore we allocate a 390 * bit more */ 391 /* allocate an skb */ 392 descr->skb = netdev_alloc_skb(card->netdev, 393 bufsize + SPIDER_NET_RXBUF_ALIGN - 1); 394 if (!descr->skb) { 395 if (netif_msg_rx_err(card) && net_ratelimit()) 396 dev_err(&card->netdev->dev, 397 "Not enough memory to allocate rx buffer\n"); 398 card->spider_stats.alloc_rx_skb_error++; 399 return -ENOMEM; 400 } 401 hwdescr->buf_size = bufsize; 402 hwdescr->result_size = 0; 403 hwdescr->valid_size = 0; 404 hwdescr->data_status = 0; 405 hwdescr->data_error = 0; 406 407 offset = ((unsigned long)descr->skb->data) & 408 (SPIDER_NET_RXBUF_ALIGN - 1); 409 if (offset) 410 skb_reserve(descr->skb, SPIDER_NET_RXBUF_ALIGN - offset); 411 /* iommu-map the skb */ 412 buf = pci_map_single(card->pdev, descr->skb->data, 413 SPIDER_NET_MAX_FRAME, PCI_DMA_FROMDEVICE); 414 if (pci_dma_mapping_error(card->pdev, buf)) { 415 dev_kfree_skb_any(descr->skb); 416 descr->skb = NULL; 417 if (netif_msg_rx_err(card) && net_ratelimit()) 418 dev_err(&card->netdev->dev, "Could not iommu-map rx buffer\n"); 419 card->spider_stats.rx_iommu_map_error++; 420 hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE; 421 } else { 422 hwdescr->buf_addr = buf; 423 wmb(); 424 hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_CARDOWNED | 425 SPIDER_NET_DMAC_NOINTR_COMPLETE; 426 } 427 428 return 0; 429 } 430 431 /** 432 * spider_net_enable_rxchtails - sets RX dmac chain tail addresses 433 * @card: card structure 434 * 435 * spider_net_enable_rxchtails sets the RX DMAC chain tail addresses in the 436 * chip by writing to the appropriate register. DMA is enabled in 437 * spider_net_enable_rxdmac. 438 */ 439 static inline void 440 spider_net_enable_rxchtails(struct spider_net_card *card) 441 { 442 /* assume chain is aligned correctly */ 443 spider_net_write_reg(card, SPIDER_NET_GDADCHA , 444 card->rx_chain.tail->bus_addr); 445 } 446 447 /** 448 * spider_net_enable_rxdmac - enables a receive DMA controller 449 * @card: card structure 450 * 451 * spider_net_enable_rxdmac enables the DMA controller by setting RX_DMA_EN 452 * in the GDADMACCNTR register 453 */ 454 static inline void 455 spider_net_enable_rxdmac(struct spider_net_card *card) 456 { 457 wmb(); 458 spider_net_write_reg(card, SPIDER_NET_GDADMACCNTR, 459 SPIDER_NET_DMA_RX_VALUE); 460 } 461 462 /** 463 * spider_net_disable_rxdmac - disables the receive DMA controller 464 * @card: card structure 465 * 466 * spider_net_disable_rxdmac terminates processing on the DMA controller 467 * by turing off the DMA controller, with the force-end flag set. 468 */ 469 static inline void 470 spider_net_disable_rxdmac(struct spider_net_card *card) 471 { 472 spider_net_write_reg(card, SPIDER_NET_GDADMACCNTR, 473 SPIDER_NET_DMA_RX_FEND_VALUE); 474 } 475 476 /** 477 * spider_net_refill_rx_chain - refills descriptors/skbs in the rx chains 478 * @card: card structure 479 * 480 * refills descriptors in the rx chain: allocates skbs and iommu-maps them. 481 */ 482 static void 483 spider_net_refill_rx_chain(struct spider_net_card *card) 484 { 485 struct spider_net_descr_chain *chain = &card->rx_chain; 486 unsigned long flags; 487 488 /* one context doing the refill (and a second context seeing that 489 * and omitting it) is ok. If called by NAPI, we'll be called again 490 * as spider_net_decode_one_descr is called several times. If some 491 * interrupt calls us, the NAPI is about to clean up anyway. */ 492 if (!spin_trylock_irqsave(&chain->lock, flags)) 493 return; 494 495 while (spider_net_get_descr_status(chain->head->hwdescr) == 496 SPIDER_NET_DESCR_NOT_IN_USE) { 497 if (spider_net_prepare_rx_descr(card, chain->head)) 498 break; 499 chain->head = chain->head->next; 500 } 501 502 spin_unlock_irqrestore(&chain->lock, flags); 503 } 504 505 /** 506 * spider_net_alloc_rx_skbs - Allocates rx skbs in rx descriptor chains 507 * @card: card structure 508 * 509 * Returns 0 on success, <0 on failure. 510 */ 511 static int 512 spider_net_alloc_rx_skbs(struct spider_net_card *card) 513 { 514 struct spider_net_descr_chain *chain = &card->rx_chain; 515 struct spider_net_descr *start = chain->tail; 516 struct spider_net_descr *descr = start; 517 518 /* Link up the hardware chain pointers */ 519 do { 520 descr->prev->hwdescr->next_descr_addr = descr->bus_addr; 521 descr = descr->next; 522 } while (descr != start); 523 524 /* Put at least one buffer into the chain. if this fails, 525 * we've got a problem. If not, spider_net_refill_rx_chain 526 * will do the rest at the end of this function. */ 527 if (spider_net_prepare_rx_descr(card, chain->head)) 528 goto error; 529 else 530 chain->head = chain->head->next; 531 532 /* This will allocate the rest of the rx buffers; 533 * if not, it's business as usual later on. */ 534 spider_net_refill_rx_chain(card); 535 spider_net_enable_rxdmac(card); 536 return 0; 537 538 error: 539 spider_net_free_rx_chain_contents(card); 540 return -ENOMEM; 541 } 542 543 /** 544 * spider_net_get_multicast_hash - generates hash for multicast filter table 545 * @netdev: interface device structure 546 * @addr: multicast address 547 * 548 * returns the hash value. 549 * 550 * spider_net_get_multicast_hash calculates a hash value for a given multicast 551 * address, that is used to set the multicast filter tables 552 */ 553 static u8 554 spider_net_get_multicast_hash(struct net_device *netdev, __u8 *addr) 555 { 556 u32 crc; 557 u8 hash; 558 char addr_for_crc[ETH_ALEN] = { 0, }; 559 int i, bit; 560 561 for (i = 0; i < ETH_ALEN * 8; i++) { 562 bit = (addr[i / 8] >> (i % 8)) & 1; 563 addr_for_crc[ETH_ALEN - 1 - i / 8] += bit << (7 - (i % 8)); 564 } 565 566 crc = crc32_be(~0, addr_for_crc, netdev->addr_len); 567 568 hash = (crc >> 27); 569 hash <<= 3; 570 hash |= crc & 7; 571 hash &= 0xff; 572 573 return hash; 574 } 575 576 /** 577 * spider_net_set_multi - sets multicast addresses and promisc flags 578 * @netdev: interface device structure 579 * 580 * spider_net_set_multi configures multicast addresses as needed for the 581 * netdev interface. It also sets up multicast, allmulti and promisc 582 * flags appropriately 583 */ 584 static void 585 spider_net_set_multi(struct net_device *netdev) 586 { 587 struct netdev_hw_addr *ha; 588 u8 hash; 589 int i; 590 u32 reg; 591 struct spider_net_card *card = netdev_priv(netdev); 592 DECLARE_BITMAP(bitmask, SPIDER_NET_MULTICAST_HASHES) = {}; 593 594 spider_net_set_promisc(card); 595 596 if (netdev->flags & IFF_ALLMULTI) { 597 for (i = 0; i < SPIDER_NET_MULTICAST_HASHES; i++) { 598 set_bit(i, bitmask); 599 } 600 goto write_hash; 601 } 602 603 /* well, we know, what the broadcast hash value is: it's xfd 604 hash = spider_net_get_multicast_hash(netdev, netdev->broadcast); */ 605 set_bit(0xfd, bitmask); 606 607 netdev_for_each_mc_addr(ha, netdev) { 608 hash = spider_net_get_multicast_hash(netdev, ha->addr); 609 set_bit(hash, bitmask); 610 } 611 612 write_hash: 613 for (i = 0; i < SPIDER_NET_MULTICAST_HASHES / 4; i++) { 614 reg = 0; 615 if (test_bit(i * 4, bitmask)) 616 reg += 0x08; 617 reg <<= 8; 618 if (test_bit(i * 4 + 1, bitmask)) 619 reg += 0x08; 620 reg <<= 8; 621 if (test_bit(i * 4 + 2, bitmask)) 622 reg += 0x08; 623 reg <<= 8; 624 if (test_bit(i * 4 + 3, bitmask)) 625 reg += 0x08; 626 627 spider_net_write_reg(card, SPIDER_NET_GMRMHFILnR + i * 4, reg); 628 } 629 } 630 631 /** 632 * spider_net_prepare_tx_descr - fill tx descriptor with skb data 633 * @card: card structure 634 * @skb: packet to use 635 * 636 * returns 0 on success, <0 on failure. 637 * 638 * fills out the descriptor structure with skb data and len. Copies data, 639 * if needed (32bit DMA!) 640 */ 641 static int 642 spider_net_prepare_tx_descr(struct spider_net_card *card, 643 struct sk_buff *skb) 644 { 645 struct spider_net_descr_chain *chain = &card->tx_chain; 646 struct spider_net_descr *descr; 647 struct spider_net_hw_descr *hwdescr; 648 dma_addr_t buf; 649 unsigned long flags; 650 651 buf = pci_map_single(card->pdev, skb->data, skb->len, PCI_DMA_TODEVICE); 652 if (pci_dma_mapping_error(card->pdev, buf)) { 653 if (netif_msg_tx_err(card) && net_ratelimit()) 654 dev_err(&card->netdev->dev, "could not iommu-map packet (%p, %i). " 655 "Dropping packet\n", skb->data, skb->len); 656 card->spider_stats.tx_iommu_map_error++; 657 return -ENOMEM; 658 } 659 660 spin_lock_irqsave(&chain->lock, flags); 661 descr = card->tx_chain.head; 662 if (descr->next == chain->tail->prev) { 663 spin_unlock_irqrestore(&chain->lock, flags); 664 pci_unmap_single(card->pdev, buf, skb->len, PCI_DMA_TODEVICE); 665 return -ENOMEM; 666 } 667 hwdescr = descr->hwdescr; 668 chain->head = descr->next; 669 670 descr->skb = skb; 671 hwdescr->buf_addr = buf; 672 hwdescr->buf_size = skb->len; 673 hwdescr->next_descr_addr = 0; 674 hwdescr->data_status = 0; 675 676 hwdescr->dmac_cmd_status = 677 SPIDER_NET_DESCR_CARDOWNED | SPIDER_NET_DMAC_TXFRMTL; 678 spin_unlock_irqrestore(&chain->lock, flags); 679 680 if (skb->ip_summed == CHECKSUM_PARTIAL) 681 switch (ip_hdr(skb)->protocol) { 682 case IPPROTO_TCP: 683 hwdescr->dmac_cmd_status |= SPIDER_NET_DMAC_TCP; 684 break; 685 case IPPROTO_UDP: 686 hwdescr->dmac_cmd_status |= SPIDER_NET_DMAC_UDP; 687 break; 688 } 689 690 /* Chain the bus address, so that the DMA engine finds this descr. */ 691 wmb(); 692 descr->prev->hwdescr->next_descr_addr = descr->bus_addr; 693 694 netif_trans_update(card->netdev); /* set netdev watchdog timer */ 695 return 0; 696 } 697 698 static int 699 spider_net_set_low_watermark(struct spider_net_card *card) 700 { 701 struct spider_net_descr *descr = card->tx_chain.tail; 702 struct spider_net_hw_descr *hwdescr; 703 unsigned long flags; 704 int status; 705 int cnt=0; 706 int i; 707 708 /* Measure the length of the queue. Measurement does not 709 * need to be precise -- does not need a lock. */ 710 while (descr != card->tx_chain.head) { 711 status = descr->hwdescr->dmac_cmd_status & SPIDER_NET_DESCR_NOT_IN_USE; 712 if (status == SPIDER_NET_DESCR_NOT_IN_USE) 713 break; 714 descr = descr->next; 715 cnt++; 716 } 717 718 /* If TX queue is short, don't even bother with interrupts */ 719 if (cnt < card->tx_chain.num_desc/4) 720 return cnt; 721 722 /* Set low-watermark 3/4th's of the way into the queue. */ 723 descr = card->tx_chain.tail; 724 cnt = (cnt*3)/4; 725 for (i=0;i<cnt; i++) 726 descr = descr->next; 727 728 /* Set the new watermark, clear the old watermark */ 729 spin_lock_irqsave(&card->tx_chain.lock, flags); 730 descr->hwdescr->dmac_cmd_status |= SPIDER_NET_DESCR_TXDESFLG; 731 if (card->low_watermark && card->low_watermark != descr) { 732 hwdescr = card->low_watermark->hwdescr; 733 hwdescr->dmac_cmd_status = 734 hwdescr->dmac_cmd_status & ~SPIDER_NET_DESCR_TXDESFLG; 735 } 736 card->low_watermark = descr; 737 spin_unlock_irqrestore(&card->tx_chain.lock, flags); 738 return cnt; 739 } 740 741 /** 742 * spider_net_release_tx_chain - processes sent tx descriptors 743 * @card: adapter structure 744 * @brutal: if set, don't care about whether descriptor seems to be in use 745 * 746 * returns 0 if the tx ring is empty, otherwise 1. 747 * 748 * spider_net_release_tx_chain releases the tx descriptors that spider has 749 * finished with (if non-brutal) or simply release tx descriptors (if brutal). 750 * If some other context is calling this function, we return 1 so that we're 751 * scheduled again (if we were scheduled) and will not lose initiative. 752 */ 753 static int 754 spider_net_release_tx_chain(struct spider_net_card *card, int brutal) 755 { 756 struct net_device *dev = card->netdev; 757 struct spider_net_descr_chain *chain = &card->tx_chain; 758 struct spider_net_descr *descr; 759 struct spider_net_hw_descr *hwdescr; 760 struct sk_buff *skb; 761 u32 buf_addr; 762 unsigned long flags; 763 int status; 764 765 while (1) { 766 spin_lock_irqsave(&chain->lock, flags); 767 if (chain->tail == chain->head) { 768 spin_unlock_irqrestore(&chain->lock, flags); 769 return 0; 770 } 771 descr = chain->tail; 772 hwdescr = descr->hwdescr; 773 774 status = spider_net_get_descr_status(hwdescr); 775 switch (status) { 776 case SPIDER_NET_DESCR_COMPLETE: 777 dev->stats.tx_packets++; 778 dev->stats.tx_bytes += descr->skb->len; 779 break; 780 781 case SPIDER_NET_DESCR_CARDOWNED: 782 if (!brutal) { 783 spin_unlock_irqrestore(&chain->lock, flags); 784 return 1; 785 } 786 787 /* fallthrough, if we release the descriptors 788 * brutally (then we don't care about 789 * SPIDER_NET_DESCR_CARDOWNED) */ 790 fallthrough; 791 792 case SPIDER_NET_DESCR_RESPONSE_ERROR: 793 case SPIDER_NET_DESCR_PROTECTION_ERROR: 794 case SPIDER_NET_DESCR_FORCE_END: 795 if (netif_msg_tx_err(card)) 796 dev_err(&card->netdev->dev, "forcing end of tx descriptor " 797 "with status x%02x\n", status); 798 dev->stats.tx_errors++; 799 break; 800 801 default: 802 dev->stats.tx_dropped++; 803 if (!brutal) { 804 spin_unlock_irqrestore(&chain->lock, flags); 805 return 1; 806 } 807 } 808 809 chain->tail = descr->next; 810 hwdescr->dmac_cmd_status |= SPIDER_NET_DESCR_NOT_IN_USE; 811 skb = descr->skb; 812 descr->skb = NULL; 813 buf_addr = hwdescr->buf_addr; 814 spin_unlock_irqrestore(&chain->lock, flags); 815 816 /* unmap the skb */ 817 if (skb) { 818 pci_unmap_single(card->pdev, buf_addr, skb->len, 819 PCI_DMA_TODEVICE); 820 dev_consume_skb_any(skb); 821 } 822 } 823 return 0; 824 } 825 826 /** 827 * spider_net_kick_tx_dma - enables TX DMA processing 828 * @card: card structure 829 * 830 * This routine will start the transmit DMA running if 831 * it is not already running. This routine ned only be 832 * called when queueing a new packet to an empty tx queue. 833 * Writes the current tx chain head as start address 834 * of the tx descriptor chain and enables the transmission 835 * DMA engine. 836 */ 837 static inline void 838 spider_net_kick_tx_dma(struct spider_net_card *card) 839 { 840 struct spider_net_descr *descr; 841 842 if (spider_net_read_reg(card, SPIDER_NET_GDTDMACCNTR) & 843 SPIDER_NET_TX_DMA_EN) 844 goto out; 845 846 descr = card->tx_chain.tail; 847 for (;;) { 848 if (spider_net_get_descr_status(descr->hwdescr) == 849 SPIDER_NET_DESCR_CARDOWNED) { 850 spider_net_write_reg(card, SPIDER_NET_GDTDCHA, 851 descr->bus_addr); 852 spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR, 853 SPIDER_NET_DMA_TX_VALUE); 854 break; 855 } 856 if (descr == card->tx_chain.head) 857 break; 858 descr = descr->next; 859 } 860 861 out: 862 mod_timer(&card->tx_timer, jiffies + SPIDER_NET_TX_TIMER); 863 } 864 865 /** 866 * spider_net_xmit - transmits a frame over the device 867 * @skb: packet to send out 868 * @netdev: interface device structure 869 * 870 * returns NETDEV_TX_OK on success, NETDEV_TX_BUSY on failure 871 */ 872 static netdev_tx_t 873 spider_net_xmit(struct sk_buff *skb, struct net_device *netdev) 874 { 875 int cnt; 876 struct spider_net_card *card = netdev_priv(netdev); 877 878 spider_net_release_tx_chain(card, 0); 879 880 if (spider_net_prepare_tx_descr(card, skb) != 0) { 881 netdev->stats.tx_dropped++; 882 netif_stop_queue(netdev); 883 return NETDEV_TX_BUSY; 884 } 885 886 cnt = spider_net_set_low_watermark(card); 887 if (cnt < 5) 888 spider_net_kick_tx_dma(card); 889 return NETDEV_TX_OK; 890 } 891 892 /** 893 * spider_net_cleanup_tx_ring - cleans up the TX ring 894 * @t: timer context used to obtain the pointer to net card data structure 895 * 896 * spider_net_cleanup_tx_ring is called by either the tx_timer 897 * or from the NAPI polling routine. 898 * This routine releases resources associted with transmitted 899 * packets, including updating the queue tail pointer. 900 */ 901 static void 902 spider_net_cleanup_tx_ring(struct timer_list *t) 903 { 904 struct spider_net_card *card = from_timer(card, t, tx_timer); 905 if ((spider_net_release_tx_chain(card, 0) != 0) && 906 (card->netdev->flags & IFF_UP)) { 907 spider_net_kick_tx_dma(card); 908 netif_wake_queue(card->netdev); 909 } 910 } 911 912 /** 913 * spider_net_do_ioctl - called for device ioctls 914 * @netdev: interface device structure 915 * @ifr: request parameter structure for ioctl 916 * @cmd: command code for ioctl 917 * 918 * returns 0 on success, <0 on failure. Currently, we have no special ioctls. 919 * -EOPNOTSUPP is returned, if an unknown ioctl was requested 920 */ 921 static int 922 spider_net_do_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd) 923 { 924 switch (cmd) { 925 default: 926 return -EOPNOTSUPP; 927 } 928 } 929 930 /** 931 * spider_net_pass_skb_up - takes an skb from a descriptor and passes it on 932 * @descr: descriptor to process 933 * @card: card structure 934 * 935 * Fills out skb structure and passes the data to the stack. 936 * The descriptor state is not changed. 937 */ 938 static void 939 spider_net_pass_skb_up(struct spider_net_descr *descr, 940 struct spider_net_card *card) 941 { 942 struct spider_net_hw_descr *hwdescr = descr->hwdescr; 943 struct sk_buff *skb = descr->skb; 944 struct net_device *netdev = card->netdev; 945 u32 data_status = hwdescr->data_status; 946 u32 data_error = hwdescr->data_error; 947 948 skb_put(skb, hwdescr->valid_size); 949 950 /* the card seems to add 2 bytes of junk in front 951 * of the ethernet frame */ 952 #define SPIDER_MISALIGN 2 953 skb_pull(skb, SPIDER_MISALIGN); 954 skb->protocol = eth_type_trans(skb, netdev); 955 956 /* checksum offload */ 957 skb_checksum_none_assert(skb); 958 if (netdev->features & NETIF_F_RXCSUM) { 959 if ( ( (data_status & SPIDER_NET_DATA_STATUS_CKSUM_MASK) == 960 SPIDER_NET_DATA_STATUS_CKSUM_MASK) && 961 !(data_error & SPIDER_NET_DATA_ERR_CKSUM_MASK)) 962 skb->ip_summed = CHECKSUM_UNNECESSARY; 963 } 964 965 if (data_status & SPIDER_NET_VLAN_PACKET) { 966 /* further enhancements: HW-accel VLAN */ 967 } 968 969 /* update netdevice statistics */ 970 netdev->stats.rx_packets++; 971 netdev->stats.rx_bytes += skb->len; 972 973 /* pass skb up to stack */ 974 netif_receive_skb(skb); 975 } 976 977 static void show_rx_chain(struct spider_net_card *card) 978 { 979 struct spider_net_descr_chain *chain = &card->rx_chain; 980 struct spider_net_descr *start= chain->tail; 981 struct spider_net_descr *descr= start; 982 struct spider_net_hw_descr *hwd = start->hwdescr; 983 struct device *dev = &card->netdev->dev; 984 u32 curr_desc, next_desc; 985 int status; 986 987 int tot = 0; 988 int cnt = 0; 989 int off = start - chain->ring; 990 int cstat = hwd->dmac_cmd_status; 991 992 dev_info(dev, "Total number of descrs=%d\n", 993 chain->num_desc); 994 dev_info(dev, "Chain tail located at descr=%d, status=0x%x\n", 995 off, cstat); 996 997 curr_desc = spider_net_read_reg(card, SPIDER_NET_GDACTDPA); 998 next_desc = spider_net_read_reg(card, SPIDER_NET_GDACNEXTDA); 999 1000 status = cstat; 1001 do 1002 { 1003 hwd = descr->hwdescr; 1004 off = descr - chain->ring; 1005 status = hwd->dmac_cmd_status; 1006 1007 if (descr == chain->head) 1008 dev_info(dev, "Chain head is at %d, head status=0x%x\n", 1009 off, status); 1010 1011 if (curr_desc == descr->bus_addr) 1012 dev_info(dev, "HW curr desc (GDACTDPA) is at %d, status=0x%x\n", 1013 off, status); 1014 1015 if (next_desc == descr->bus_addr) 1016 dev_info(dev, "HW next desc (GDACNEXTDA) is at %d, status=0x%x\n", 1017 off, status); 1018 1019 if (hwd->next_descr_addr == 0) 1020 dev_info(dev, "chain is cut at %d\n", off); 1021 1022 if (cstat != status) { 1023 int from = (chain->num_desc + off - cnt) % chain->num_desc; 1024 int to = (chain->num_desc + off - 1) % chain->num_desc; 1025 dev_info(dev, "Have %d (from %d to %d) descrs " 1026 "with stat=0x%08x\n", cnt, from, to, cstat); 1027 cstat = status; 1028 cnt = 0; 1029 } 1030 1031 cnt ++; 1032 tot ++; 1033 descr = descr->next; 1034 } while (descr != start); 1035 1036 dev_info(dev, "Last %d descrs with stat=0x%08x " 1037 "for a total of %d descrs\n", cnt, cstat, tot); 1038 1039 #ifdef DEBUG 1040 /* Now dump the whole ring */ 1041 descr = start; 1042 do 1043 { 1044 struct spider_net_hw_descr *hwd = descr->hwdescr; 1045 status = spider_net_get_descr_status(hwd); 1046 cnt = descr - chain->ring; 1047 dev_info(dev, "Descr %d stat=0x%08x skb=%p\n", 1048 cnt, status, descr->skb); 1049 dev_info(dev, "bus addr=%08x buf addr=%08x sz=%d\n", 1050 descr->bus_addr, hwd->buf_addr, hwd->buf_size); 1051 dev_info(dev, "next=%08x result sz=%d valid sz=%d\n", 1052 hwd->next_descr_addr, hwd->result_size, 1053 hwd->valid_size); 1054 dev_info(dev, "dmac=%08x data stat=%08x data err=%08x\n", 1055 hwd->dmac_cmd_status, hwd->data_status, 1056 hwd->data_error); 1057 dev_info(dev, "\n"); 1058 1059 descr = descr->next; 1060 } while (descr != start); 1061 #endif 1062 1063 } 1064 1065 /** 1066 * spider_net_resync_head_ptr - Advance head ptr past empty descrs 1067 * @card: card structure 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 * @napi: napi 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 * @p: 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 * @error_reg1: interrupt status register 1 (GHIINT1STS) 1346 * @error_reg2: interrupt status register 2 (GHIINT2STS) 1347 * 1348 * spider_net_handle_error_irq treats or ignores all error conditions 1349 * found when an interrupt is presented 1350 */ 1351 static void 1352 spider_net_handle_error_irq(struct spider_net_card *card, u32 status_reg, 1353 u32 error_reg1, u32 error_reg2) 1354 { 1355 u32 i; 1356 int show_error = 1; 1357 1358 /* check GHIINT0STS ************************************/ 1359 if (status_reg) 1360 for (i = 0; i < 32; i++) 1361 if (status_reg & (1<<i)) 1362 switch (i) 1363 { 1364 /* let error_reg1 and error_reg2 evaluation decide, what to do 1365 case SPIDER_NET_PHYINT: 1366 case SPIDER_NET_GMAC2INT: 1367 case SPIDER_NET_GMAC1INT: 1368 case SPIDER_NET_GFIFOINT: 1369 case SPIDER_NET_DMACINT: 1370 case SPIDER_NET_GSYSINT: 1371 break; */ 1372 1373 case SPIDER_NET_GIPSINT: 1374 show_error = 0; 1375 break; 1376 1377 case SPIDER_NET_GPWOPCMPINT: 1378 /* PHY write operation completed */ 1379 show_error = 0; 1380 break; 1381 case SPIDER_NET_GPROPCMPINT: 1382 /* PHY read operation completed */ 1383 /* we don't use semaphores, as we poll for the completion 1384 * of the read operation in spider_net_read_phy. Should take 1385 * about 50 us */ 1386 show_error = 0; 1387 break; 1388 case SPIDER_NET_GPWFFINT: 1389 /* PHY command queue full */ 1390 if (netif_msg_intr(card)) 1391 dev_err(&card->netdev->dev, "PHY write queue full\n"); 1392 show_error = 0; 1393 break; 1394 1395 /* case SPIDER_NET_GRMDADRINT: not used. print a message */ 1396 /* case SPIDER_NET_GRMARPINT: not used. print a message */ 1397 /* case SPIDER_NET_GRMMPINT: not used. print a message */ 1398 1399 case SPIDER_NET_GDTDEN0INT: 1400 /* someone has set TX_DMA_EN to 0 */ 1401 show_error = 0; 1402 break; 1403 1404 case SPIDER_NET_GDDDEN0INT: 1405 case SPIDER_NET_GDCDEN0INT: 1406 case SPIDER_NET_GDBDEN0INT: 1407 case SPIDER_NET_GDADEN0INT: 1408 /* someone has set RX_DMA_EN to 0 */ 1409 show_error = 0; 1410 break; 1411 1412 /* RX interrupts */ 1413 case SPIDER_NET_GDDFDCINT: 1414 case SPIDER_NET_GDCFDCINT: 1415 case SPIDER_NET_GDBFDCINT: 1416 case SPIDER_NET_GDAFDCINT: 1417 /* case SPIDER_NET_GDNMINT: not used. print a message */ 1418 /* case SPIDER_NET_GCNMINT: not used. print a message */ 1419 /* case SPIDER_NET_GBNMINT: not used. print a message */ 1420 /* case SPIDER_NET_GANMINT: not used. print a message */ 1421 /* case SPIDER_NET_GRFNMINT: not used. print a message */ 1422 show_error = 0; 1423 break; 1424 1425 /* TX interrupts */ 1426 case SPIDER_NET_GDTFDCINT: 1427 show_error = 0; 1428 break; 1429 case SPIDER_NET_GTTEDINT: 1430 show_error = 0; 1431 break; 1432 case SPIDER_NET_GDTDCEINT: 1433 /* chain end. If a descriptor should be sent, kick off 1434 * tx dma 1435 if (card->tx_chain.tail != card->tx_chain.head) 1436 spider_net_kick_tx_dma(card); 1437 */ 1438 show_error = 0; 1439 break; 1440 1441 /* case SPIDER_NET_G1TMCNTINT: not used. print a message */ 1442 /* case SPIDER_NET_GFREECNTINT: not used. print a message */ 1443 } 1444 1445 /* check GHIINT1STS ************************************/ 1446 if (error_reg1) 1447 for (i = 0; i < 32; i++) 1448 if (error_reg1 & (1<<i)) 1449 switch (i) 1450 { 1451 case SPIDER_NET_GTMFLLINT: 1452 /* TX RAM full may happen on a usual case. 1453 * Logging is not needed. */ 1454 show_error = 0; 1455 break; 1456 case SPIDER_NET_GRFDFLLINT: 1457 case SPIDER_NET_GRFCFLLINT: 1458 case SPIDER_NET_GRFBFLLINT: 1459 case SPIDER_NET_GRFAFLLINT: 1460 case SPIDER_NET_GRMFLLINT: 1461 /* Could happen when rx chain is full */ 1462 if (card->ignore_rx_ramfull == 0) { 1463 card->ignore_rx_ramfull = 1; 1464 spider_net_resync_head_ptr(card); 1465 spider_net_refill_rx_chain(card); 1466 spider_net_enable_rxdmac(card); 1467 card->num_rx_ints ++; 1468 napi_schedule(&card->napi); 1469 } 1470 show_error = 0; 1471 break; 1472 1473 /* case SPIDER_NET_GTMSHTINT: problem, print a message */ 1474 case SPIDER_NET_GDTINVDINT: 1475 /* allrighty. tx from previous descr ok */ 1476 show_error = 0; 1477 break; 1478 1479 /* chain end */ 1480 case SPIDER_NET_GDDDCEINT: 1481 case SPIDER_NET_GDCDCEINT: 1482 case SPIDER_NET_GDBDCEINT: 1483 case SPIDER_NET_GDADCEINT: 1484 spider_net_resync_head_ptr(card); 1485 spider_net_refill_rx_chain(card); 1486 spider_net_enable_rxdmac(card); 1487 card->num_rx_ints ++; 1488 napi_schedule(&card->napi); 1489 show_error = 0; 1490 break; 1491 1492 /* invalid descriptor */ 1493 case SPIDER_NET_GDDINVDINT: 1494 case SPIDER_NET_GDCINVDINT: 1495 case SPIDER_NET_GDBINVDINT: 1496 case SPIDER_NET_GDAINVDINT: 1497 /* Could happen when rx chain is full */ 1498 spider_net_resync_head_ptr(card); 1499 spider_net_refill_rx_chain(card); 1500 spider_net_enable_rxdmac(card); 1501 card->num_rx_ints ++; 1502 napi_schedule(&card->napi); 1503 show_error = 0; 1504 break; 1505 1506 /* case SPIDER_NET_GDTRSERINT: problem, print a message */ 1507 /* case SPIDER_NET_GDDRSERINT: problem, print a message */ 1508 /* case SPIDER_NET_GDCRSERINT: problem, print a message */ 1509 /* case SPIDER_NET_GDBRSERINT: problem, print a message */ 1510 /* case SPIDER_NET_GDARSERINT: problem, print a message */ 1511 /* case SPIDER_NET_GDSERINT: problem, print a message */ 1512 /* case SPIDER_NET_GDTPTERINT: problem, print a message */ 1513 /* case SPIDER_NET_GDDPTERINT: problem, print a message */ 1514 /* case SPIDER_NET_GDCPTERINT: problem, print a message */ 1515 /* case SPIDER_NET_GDBPTERINT: problem, print a message */ 1516 /* case SPIDER_NET_GDAPTERINT: problem, print a message */ 1517 default: 1518 show_error = 1; 1519 break; 1520 } 1521 1522 /* check GHIINT2STS ************************************/ 1523 if (error_reg2) 1524 for (i = 0; i < 32; i++) 1525 if (error_reg2 & (1<<i)) 1526 switch (i) 1527 { 1528 /* there is nothing we can (want to) do at this time. Log a 1529 * message, we can switch on and off the specific values later on 1530 case SPIDER_NET_GPROPERINT: 1531 case SPIDER_NET_GMCTCRSNGINT: 1532 case SPIDER_NET_GMCTLCOLINT: 1533 case SPIDER_NET_GMCTTMOTINT: 1534 case SPIDER_NET_GMCRCAERINT: 1535 case SPIDER_NET_GMCRCALERINT: 1536 case SPIDER_NET_GMCRALNERINT: 1537 case SPIDER_NET_GMCROVRINT: 1538 case SPIDER_NET_GMCRRNTINT: 1539 case SPIDER_NET_GMCRRXERINT: 1540 case SPIDER_NET_GTITCSERINT: 1541 case SPIDER_NET_GTIFMTERINT: 1542 case SPIDER_NET_GTIPKTRVKINT: 1543 case SPIDER_NET_GTISPINGINT: 1544 case SPIDER_NET_GTISADNGINT: 1545 case SPIDER_NET_GTISPDNGINT: 1546 case SPIDER_NET_GRIFMTERINT: 1547 case SPIDER_NET_GRIPKTRVKINT: 1548 case SPIDER_NET_GRISPINGINT: 1549 case SPIDER_NET_GRISADNGINT: 1550 case SPIDER_NET_GRISPDNGINT: 1551 break; 1552 */ 1553 default: 1554 break; 1555 } 1556 1557 if ((show_error) && (netif_msg_intr(card)) && net_ratelimit()) 1558 dev_err(&card->netdev->dev, "Error interrupt, GHIINT0STS = 0x%08x, " 1559 "GHIINT1STS = 0x%08x, GHIINT2STS = 0x%08x\n", 1560 status_reg, error_reg1, error_reg2); 1561 1562 /* clear interrupt sources */ 1563 spider_net_write_reg(card, SPIDER_NET_GHIINT1STS, error_reg1); 1564 spider_net_write_reg(card, SPIDER_NET_GHIINT2STS, error_reg2); 1565 } 1566 1567 /** 1568 * spider_net_interrupt - interrupt handler for spider_net 1569 * @irq: interrupt number 1570 * @ptr: pointer to net_device 1571 * 1572 * returns IRQ_HANDLED, if interrupt was for driver, or IRQ_NONE, if no 1573 * interrupt found raised by card. 1574 * 1575 * This is the interrupt handler, that turns off 1576 * interrupts for this device and makes the stack poll the driver 1577 */ 1578 static irqreturn_t 1579 spider_net_interrupt(int irq, void *ptr) 1580 { 1581 struct net_device *netdev = ptr; 1582 struct spider_net_card *card = netdev_priv(netdev); 1583 u32 status_reg, error_reg1, error_reg2; 1584 1585 status_reg = spider_net_read_reg(card, SPIDER_NET_GHIINT0STS); 1586 error_reg1 = spider_net_read_reg(card, SPIDER_NET_GHIINT1STS); 1587 error_reg2 = spider_net_read_reg(card, SPIDER_NET_GHIINT2STS); 1588 1589 if (!(status_reg & SPIDER_NET_INT0_MASK_VALUE) && 1590 !(error_reg1 & SPIDER_NET_INT1_MASK_VALUE) && 1591 !(error_reg2 & SPIDER_NET_INT2_MASK_VALUE)) 1592 return IRQ_NONE; 1593 1594 if (status_reg & SPIDER_NET_RXINT ) { 1595 spider_net_rx_irq_off(card); 1596 napi_schedule(&card->napi); 1597 card->num_rx_ints ++; 1598 } 1599 if (status_reg & SPIDER_NET_TXINT) 1600 napi_schedule(&card->napi); 1601 1602 if (status_reg & SPIDER_NET_LINKINT) 1603 spider_net_link_reset(netdev); 1604 1605 if (status_reg & SPIDER_NET_ERRINT ) 1606 spider_net_handle_error_irq(card, status_reg, 1607 error_reg1, error_reg2); 1608 1609 /* clear interrupt sources */ 1610 spider_net_write_reg(card, SPIDER_NET_GHIINT0STS, status_reg); 1611 1612 return IRQ_HANDLED; 1613 } 1614 1615 #ifdef CONFIG_NET_POLL_CONTROLLER 1616 /** 1617 * spider_net_poll_controller - artificial interrupt for netconsole etc. 1618 * @netdev: interface device structure 1619 * 1620 * see Documentation/networking/netconsole.rst 1621 */ 1622 static void 1623 spider_net_poll_controller(struct net_device *netdev) 1624 { 1625 disable_irq(netdev->irq); 1626 spider_net_interrupt(netdev->irq, netdev); 1627 enable_irq(netdev->irq); 1628 } 1629 #endif /* CONFIG_NET_POLL_CONTROLLER */ 1630 1631 /** 1632 * spider_net_enable_interrupts - enable interrupts 1633 * @card: card structure 1634 * 1635 * spider_net_enable_interrupt enables several interrupts 1636 */ 1637 static void 1638 spider_net_enable_interrupts(struct spider_net_card *card) 1639 { 1640 spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, 1641 SPIDER_NET_INT0_MASK_VALUE); 1642 spider_net_write_reg(card, SPIDER_NET_GHIINT1MSK, 1643 SPIDER_NET_INT1_MASK_VALUE); 1644 spider_net_write_reg(card, SPIDER_NET_GHIINT2MSK, 1645 SPIDER_NET_INT2_MASK_VALUE); 1646 } 1647 1648 /** 1649 * spider_net_disable_interrupts - disable interrupts 1650 * @card: card structure 1651 * 1652 * spider_net_disable_interrupts disables all the interrupts 1653 */ 1654 static void 1655 spider_net_disable_interrupts(struct spider_net_card *card) 1656 { 1657 spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, 0); 1658 spider_net_write_reg(card, SPIDER_NET_GHIINT1MSK, 0); 1659 spider_net_write_reg(card, SPIDER_NET_GHIINT2MSK, 0); 1660 spider_net_write_reg(card, SPIDER_NET_GMACINTEN, 0); 1661 } 1662 1663 /** 1664 * spider_net_init_card - initializes the card 1665 * @card: card structure 1666 * 1667 * spider_net_init_card initializes the card so that other registers can 1668 * be used 1669 */ 1670 static void 1671 spider_net_init_card(struct spider_net_card *card) 1672 { 1673 spider_net_write_reg(card, SPIDER_NET_CKRCTRL, 1674 SPIDER_NET_CKRCTRL_STOP_VALUE); 1675 1676 spider_net_write_reg(card, SPIDER_NET_CKRCTRL, 1677 SPIDER_NET_CKRCTRL_RUN_VALUE); 1678 1679 /* trigger ETOMOD signal */ 1680 spider_net_write_reg(card, SPIDER_NET_GMACOPEMD, 1681 spider_net_read_reg(card, SPIDER_NET_GMACOPEMD) | 0x4); 1682 1683 spider_net_disable_interrupts(card); 1684 } 1685 1686 /** 1687 * spider_net_enable_card - enables the card by setting all kinds of regs 1688 * @card: card structure 1689 * 1690 * spider_net_enable_card sets a lot of SMMIO registers to enable the device 1691 */ 1692 static void 1693 spider_net_enable_card(struct spider_net_card *card) 1694 { 1695 int i; 1696 /* the following array consists of (register),(value) pairs 1697 * that are set in this function. A register of 0 ends the list */ 1698 u32 regs[][2] = { 1699 { SPIDER_NET_GRESUMINTNUM, 0 }, 1700 { SPIDER_NET_GREINTNUM, 0 }, 1701 1702 /* set interrupt frame number registers */ 1703 /* clear the single DMA engine registers first */ 1704 { SPIDER_NET_GFAFRMNUM, SPIDER_NET_GFXFRAMES_VALUE }, 1705 { SPIDER_NET_GFBFRMNUM, SPIDER_NET_GFXFRAMES_VALUE }, 1706 { SPIDER_NET_GFCFRMNUM, SPIDER_NET_GFXFRAMES_VALUE }, 1707 { SPIDER_NET_GFDFRMNUM, SPIDER_NET_GFXFRAMES_VALUE }, 1708 /* then set, what we really need */ 1709 { SPIDER_NET_GFFRMNUM, SPIDER_NET_FRAMENUM_VALUE }, 1710 1711 /* timer counter registers and stuff */ 1712 { SPIDER_NET_GFREECNNUM, 0 }, 1713 { SPIDER_NET_GONETIMENUM, 0 }, 1714 { SPIDER_NET_GTOUTFRMNUM, 0 }, 1715 1716 /* RX mode setting */ 1717 { SPIDER_NET_GRXMDSET, SPIDER_NET_RXMODE_VALUE }, 1718 /* TX mode setting */ 1719 { SPIDER_NET_GTXMDSET, SPIDER_NET_TXMODE_VALUE }, 1720 /* IPSEC mode setting */ 1721 { SPIDER_NET_GIPSECINIT, SPIDER_NET_IPSECINIT_VALUE }, 1722 1723 { SPIDER_NET_GFTRESTRT, SPIDER_NET_RESTART_VALUE }, 1724 1725 { SPIDER_NET_GMRWOLCTRL, 0 }, 1726 { SPIDER_NET_GTESTMD, 0x10000000 }, 1727 { SPIDER_NET_GTTQMSK, 0x00400040 }, 1728 1729 { SPIDER_NET_GMACINTEN, 0 }, 1730 1731 /* flow control stuff */ 1732 { SPIDER_NET_GMACAPAUSE, SPIDER_NET_MACAPAUSE_VALUE }, 1733 { SPIDER_NET_GMACTXPAUSE, SPIDER_NET_TXPAUSE_VALUE }, 1734 1735 { SPIDER_NET_GMACBSTLMT, SPIDER_NET_BURSTLMT_VALUE }, 1736 { 0, 0} 1737 }; 1738 1739 i = 0; 1740 while (regs[i][0]) { 1741 spider_net_write_reg(card, regs[i][0], regs[i][1]); 1742 i++; 1743 } 1744 1745 /* clear unicast filter table entries 1 to 14 */ 1746 for (i = 1; i <= 14; i++) { 1747 spider_net_write_reg(card, 1748 SPIDER_NET_GMRUAFILnR + i * 8, 1749 0x00080000); 1750 spider_net_write_reg(card, 1751 SPIDER_NET_GMRUAFILnR + i * 8 + 4, 1752 0x00000000); 1753 } 1754 1755 spider_net_write_reg(card, SPIDER_NET_GMRUA0FIL15R, 0x08080000); 1756 1757 spider_net_write_reg(card, SPIDER_NET_ECMODE, SPIDER_NET_ECMODE_VALUE); 1758 1759 /* set chain tail address for RX chains and 1760 * enable DMA */ 1761 spider_net_enable_rxchtails(card); 1762 spider_net_enable_rxdmac(card); 1763 1764 spider_net_write_reg(card, SPIDER_NET_GRXDMAEN, SPIDER_NET_WOL_VALUE); 1765 1766 spider_net_write_reg(card, SPIDER_NET_GMACLENLMT, 1767 SPIDER_NET_LENLMT_VALUE); 1768 spider_net_write_reg(card, SPIDER_NET_GMACOPEMD, 1769 SPIDER_NET_OPMODE_VALUE); 1770 1771 spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR, 1772 SPIDER_NET_GDTBSTA); 1773 } 1774 1775 /** 1776 * spider_net_download_firmware - loads firmware into the adapter 1777 * @card: card structure 1778 * @firmware_ptr: pointer to firmware data 1779 * 1780 * spider_net_download_firmware loads the firmware data into the 1781 * adapter. It assumes the length etc. to be allright. 1782 */ 1783 static int 1784 spider_net_download_firmware(struct spider_net_card *card, 1785 const void *firmware_ptr) 1786 { 1787 int sequencer, i; 1788 const u32 *fw_ptr = firmware_ptr; 1789 1790 /* stop sequencers */ 1791 spider_net_write_reg(card, SPIDER_NET_GSINIT, 1792 SPIDER_NET_STOP_SEQ_VALUE); 1793 1794 for (sequencer = 0; sequencer < SPIDER_NET_FIRMWARE_SEQS; 1795 sequencer++) { 1796 spider_net_write_reg(card, 1797 SPIDER_NET_GSnPRGADR + sequencer * 8, 0); 1798 for (i = 0; i < SPIDER_NET_FIRMWARE_SEQWORDS; i++) { 1799 spider_net_write_reg(card, SPIDER_NET_GSnPRGDAT + 1800 sequencer * 8, *fw_ptr); 1801 fw_ptr++; 1802 } 1803 } 1804 1805 if (spider_net_read_reg(card, SPIDER_NET_GSINIT)) 1806 return -EIO; 1807 1808 spider_net_write_reg(card, SPIDER_NET_GSINIT, 1809 SPIDER_NET_RUN_SEQ_VALUE); 1810 1811 return 0; 1812 } 1813 1814 /** 1815 * spider_net_init_firmware - reads in firmware parts 1816 * @card: card structure 1817 * 1818 * Returns 0 on success, <0 on failure 1819 * 1820 * spider_net_init_firmware opens the sequencer firmware and does some basic 1821 * checks. This function opens and releases the firmware structure. A call 1822 * to download the firmware is performed before the release. 1823 * 1824 * Firmware format 1825 * =============== 1826 * spider_fw.bin is expected to be a file containing 6*1024*4 bytes, 4k being 1827 * the program for each sequencer. Use the command 1828 * tail -q -n +2 Seq_code1_0x088.txt Seq_code2_0x090.txt \ 1829 * Seq_code3_0x098.txt Seq_code4_0x0A0.txt Seq_code5_0x0A8.txt \ 1830 * Seq_code6_0x0B0.txt | xxd -r -p -c4 > spider_fw.bin 1831 * 1832 * to generate spider_fw.bin, if you have sequencer programs with something 1833 * like the following contents for each sequencer: 1834 * <ONE LINE COMMENT> 1835 * <FIRST 4-BYTES-WORD FOR SEQUENCER> 1836 * <SECOND 4-BYTES-WORD FOR SEQUENCER> 1837 * ... 1838 * <1024th 4-BYTES-WORD FOR SEQUENCER> 1839 */ 1840 static int 1841 spider_net_init_firmware(struct spider_net_card *card) 1842 { 1843 struct firmware *firmware = NULL; 1844 struct device_node *dn; 1845 const u8 *fw_prop = NULL; 1846 int err = -ENOENT; 1847 int fw_size; 1848 1849 if (request_firmware((const struct firmware **)&firmware, 1850 SPIDER_NET_FIRMWARE_NAME, &card->pdev->dev) == 0) { 1851 if ( (firmware->size != SPIDER_NET_FIRMWARE_LEN) && 1852 netif_msg_probe(card) ) { 1853 dev_err(&card->netdev->dev, 1854 "Incorrect size of spidernet firmware in " \ 1855 "filesystem. Looking in host firmware...\n"); 1856 goto try_host_fw; 1857 } 1858 err = spider_net_download_firmware(card, firmware->data); 1859 1860 release_firmware(firmware); 1861 if (err) 1862 goto try_host_fw; 1863 1864 goto done; 1865 } 1866 1867 try_host_fw: 1868 dn = pci_device_to_OF_node(card->pdev); 1869 if (!dn) 1870 goto out_err; 1871 1872 fw_prop = of_get_property(dn, "firmware", &fw_size); 1873 if (!fw_prop) 1874 goto out_err; 1875 1876 if ( (fw_size != SPIDER_NET_FIRMWARE_LEN) && 1877 netif_msg_probe(card) ) { 1878 dev_err(&card->netdev->dev, 1879 "Incorrect size of spidernet firmware in host firmware\n"); 1880 goto done; 1881 } 1882 1883 err = spider_net_download_firmware(card, fw_prop); 1884 1885 done: 1886 return err; 1887 out_err: 1888 if (netif_msg_probe(card)) 1889 dev_err(&card->netdev->dev, 1890 "Couldn't find spidernet firmware in filesystem " \ 1891 "or host firmware\n"); 1892 return err; 1893 } 1894 1895 /** 1896 * spider_net_open - called upon ifonfig up 1897 * @netdev: interface device structure 1898 * 1899 * returns 0 on success, <0 on failure 1900 * 1901 * spider_net_open allocates all the descriptors and memory needed for 1902 * operation, sets up multicast list and enables interrupts 1903 */ 1904 int 1905 spider_net_open(struct net_device *netdev) 1906 { 1907 struct spider_net_card *card = netdev_priv(netdev); 1908 int result; 1909 1910 result = spider_net_init_firmware(card); 1911 if (result) 1912 goto init_firmware_failed; 1913 1914 /* start probing with copper */ 1915 card->aneg_count = 0; 1916 card->medium = BCM54XX_COPPER; 1917 spider_net_setup_aneg(card); 1918 if (card->phy.def->phy_id) 1919 mod_timer(&card->aneg_timer, jiffies + SPIDER_NET_ANEG_TIMER); 1920 1921 result = spider_net_init_chain(card, &card->tx_chain); 1922 if (result) 1923 goto alloc_tx_failed; 1924 card->low_watermark = NULL; 1925 1926 result = spider_net_init_chain(card, &card->rx_chain); 1927 if (result) 1928 goto alloc_rx_failed; 1929 1930 /* Allocate rx skbs */ 1931 result = spider_net_alloc_rx_skbs(card); 1932 if (result) 1933 goto alloc_skbs_failed; 1934 1935 spider_net_set_multi(netdev); 1936 1937 /* further enhancement: setup hw vlan, if needed */ 1938 1939 result = -EBUSY; 1940 if (request_irq(netdev->irq, spider_net_interrupt, 1941 IRQF_SHARED, netdev->name, netdev)) 1942 goto register_int_failed; 1943 1944 spider_net_enable_card(card); 1945 1946 netif_start_queue(netdev); 1947 netif_carrier_on(netdev); 1948 napi_enable(&card->napi); 1949 1950 spider_net_enable_interrupts(card); 1951 1952 return 0; 1953 1954 register_int_failed: 1955 spider_net_free_rx_chain_contents(card); 1956 alloc_skbs_failed: 1957 spider_net_free_chain(card, &card->rx_chain); 1958 alloc_rx_failed: 1959 spider_net_free_chain(card, &card->tx_chain); 1960 alloc_tx_failed: 1961 del_timer_sync(&card->aneg_timer); 1962 init_firmware_failed: 1963 return result; 1964 } 1965 1966 /** 1967 * spider_net_link_phy 1968 * @t: timer context used to obtain the pointer to net card data structure 1969 */ 1970 static void spider_net_link_phy(struct timer_list *t) 1971 { 1972 struct spider_net_card *card = from_timer(card, t, aneg_timer); 1973 struct mii_phy *phy = &card->phy; 1974 1975 /* if link didn't come up after SPIDER_NET_ANEG_TIMEOUT tries, setup phy again */ 1976 if (card->aneg_count > SPIDER_NET_ANEG_TIMEOUT) { 1977 1978 pr_debug("%s: link is down trying to bring it up\n", 1979 card->netdev->name); 1980 1981 switch (card->medium) { 1982 case BCM54XX_COPPER: 1983 /* enable fiber with autonegotiation first */ 1984 if (phy->def->ops->enable_fiber) 1985 phy->def->ops->enable_fiber(phy, 1); 1986 card->medium = BCM54XX_FIBER; 1987 break; 1988 1989 case BCM54XX_FIBER: 1990 /* fiber didn't come up, try to disable fiber autoneg */ 1991 if (phy->def->ops->enable_fiber) 1992 phy->def->ops->enable_fiber(phy, 0); 1993 card->medium = BCM54XX_UNKNOWN; 1994 break; 1995 1996 case BCM54XX_UNKNOWN: 1997 /* copper, fiber with and without failed, 1998 * retry from beginning */ 1999 spider_net_setup_aneg(card); 2000 card->medium = BCM54XX_COPPER; 2001 break; 2002 } 2003 2004 card->aneg_count = 0; 2005 mod_timer(&card->aneg_timer, jiffies + SPIDER_NET_ANEG_TIMER); 2006 return; 2007 } 2008 2009 /* link still not up, try again later */ 2010 if (!(phy->def->ops->poll_link(phy))) { 2011 card->aneg_count++; 2012 mod_timer(&card->aneg_timer, jiffies + SPIDER_NET_ANEG_TIMER); 2013 return; 2014 } 2015 2016 /* link came up, get abilities */ 2017 phy->def->ops->read_link(phy); 2018 2019 spider_net_write_reg(card, SPIDER_NET_GMACST, 2020 spider_net_read_reg(card, SPIDER_NET_GMACST)); 2021 spider_net_write_reg(card, SPIDER_NET_GMACINTEN, 0x4); 2022 2023 if (phy->speed == 1000) 2024 spider_net_write_reg(card, SPIDER_NET_GMACMODE, 0x00000001); 2025 else 2026 spider_net_write_reg(card, SPIDER_NET_GMACMODE, 0); 2027 2028 card->aneg_count = 0; 2029 2030 pr_info("%s: link up, %i Mbps, %s-duplex %sautoneg.\n", 2031 card->netdev->name, phy->speed, 2032 phy->duplex == 1 ? "Full" : "Half", 2033 phy->autoneg == 1 ? "" : "no "); 2034 } 2035 2036 /** 2037 * spider_net_setup_phy - setup PHY 2038 * @card: card structure 2039 * 2040 * returns 0 on success, <0 on failure 2041 * 2042 * spider_net_setup_phy is used as part of spider_net_probe. 2043 **/ 2044 static int 2045 spider_net_setup_phy(struct spider_net_card *card) 2046 { 2047 struct mii_phy *phy = &card->phy; 2048 2049 spider_net_write_reg(card, SPIDER_NET_GDTDMASEL, 2050 SPIDER_NET_DMASEL_VALUE); 2051 spider_net_write_reg(card, SPIDER_NET_GPCCTRL, 2052 SPIDER_NET_PHY_CTRL_VALUE); 2053 2054 phy->dev = card->netdev; 2055 phy->mdio_read = spider_net_read_phy; 2056 phy->mdio_write = spider_net_write_phy; 2057 2058 for (phy->mii_id = 1; phy->mii_id <= 31; phy->mii_id++) { 2059 unsigned short id; 2060 id = spider_net_read_phy(card->netdev, phy->mii_id, MII_BMSR); 2061 if (id != 0x0000 && id != 0xffff) { 2062 if (!sungem_phy_probe(phy, phy->mii_id)) { 2063 pr_info("Found %s.\n", phy->def->name); 2064 break; 2065 } 2066 } 2067 } 2068 2069 return 0; 2070 } 2071 2072 /** 2073 * spider_net_workaround_rxramfull - work around firmware bug 2074 * @card: card structure 2075 * 2076 * no return value 2077 **/ 2078 static void 2079 spider_net_workaround_rxramfull(struct spider_net_card *card) 2080 { 2081 int i, sequencer = 0; 2082 2083 /* cancel reset */ 2084 spider_net_write_reg(card, SPIDER_NET_CKRCTRL, 2085 SPIDER_NET_CKRCTRL_RUN_VALUE); 2086 2087 /* empty sequencer data */ 2088 for (sequencer = 0; sequencer < SPIDER_NET_FIRMWARE_SEQS; 2089 sequencer++) { 2090 spider_net_write_reg(card, SPIDER_NET_GSnPRGADR + 2091 sequencer * 8, 0x0); 2092 for (i = 0; i < SPIDER_NET_FIRMWARE_SEQWORDS; i++) { 2093 spider_net_write_reg(card, SPIDER_NET_GSnPRGDAT + 2094 sequencer * 8, 0x0); 2095 } 2096 } 2097 2098 /* set sequencer operation */ 2099 spider_net_write_reg(card, SPIDER_NET_GSINIT, 0x000000fe); 2100 2101 /* reset */ 2102 spider_net_write_reg(card, SPIDER_NET_CKRCTRL, 2103 SPIDER_NET_CKRCTRL_STOP_VALUE); 2104 } 2105 2106 /** 2107 * spider_net_stop - called upon ifconfig down 2108 * @netdev: interface device structure 2109 * 2110 * always returns 0 2111 */ 2112 int 2113 spider_net_stop(struct net_device *netdev) 2114 { 2115 struct spider_net_card *card = netdev_priv(netdev); 2116 2117 napi_disable(&card->napi); 2118 netif_carrier_off(netdev); 2119 netif_stop_queue(netdev); 2120 del_timer_sync(&card->tx_timer); 2121 del_timer_sync(&card->aneg_timer); 2122 2123 spider_net_disable_interrupts(card); 2124 2125 free_irq(netdev->irq, netdev); 2126 2127 spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR, 2128 SPIDER_NET_DMA_TX_FEND_VALUE); 2129 2130 /* turn off DMA, force end */ 2131 spider_net_disable_rxdmac(card); 2132 2133 /* release chains */ 2134 spider_net_release_tx_chain(card, 1); 2135 spider_net_free_rx_chain_contents(card); 2136 2137 spider_net_free_chain(card, &card->tx_chain); 2138 spider_net_free_chain(card, &card->rx_chain); 2139 2140 return 0; 2141 } 2142 2143 /** 2144 * spider_net_tx_timeout_task - task scheduled by the watchdog timeout 2145 * function (to be called not under interrupt status) 2146 * @work: work context used to obtain the pointer to net card data structure 2147 * 2148 * called as task when tx hangs, resets interface (if interface is up) 2149 */ 2150 static void 2151 spider_net_tx_timeout_task(struct work_struct *work) 2152 { 2153 struct spider_net_card *card = 2154 container_of(work, struct spider_net_card, tx_timeout_task); 2155 struct net_device *netdev = card->netdev; 2156 2157 if (!(netdev->flags & IFF_UP)) 2158 goto out; 2159 2160 netif_device_detach(netdev); 2161 spider_net_stop(netdev); 2162 2163 spider_net_workaround_rxramfull(card); 2164 spider_net_init_card(card); 2165 2166 if (spider_net_setup_phy(card)) 2167 goto out; 2168 2169 spider_net_open(netdev); 2170 spider_net_kick_tx_dma(card); 2171 netif_device_attach(netdev); 2172 2173 out: 2174 atomic_dec(&card->tx_timeout_task_counter); 2175 } 2176 2177 /** 2178 * spider_net_tx_timeout - called when the tx timeout watchdog kicks in. 2179 * @netdev: interface device structure 2180 * @txqueue: unused 2181 * 2182 * called, if tx hangs. Schedules a task that resets the interface 2183 */ 2184 static void 2185 spider_net_tx_timeout(struct net_device *netdev, unsigned int txqueue) 2186 { 2187 struct spider_net_card *card; 2188 2189 card = netdev_priv(netdev); 2190 atomic_inc(&card->tx_timeout_task_counter); 2191 if (netdev->flags & IFF_UP) 2192 schedule_work(&card->tx_timeout_task); 2193 else 2194 atomic_dec(&card->tx_timeout_task_counter); 2195 card->spider_stats.tx_timeouts++; 2196 } 2197 2198 static const struct net_device_ops spider_net_ops = { 2199 .ndo_open = spider_net_open, 2200 .ndo_stop = spider_net_stop, 2201 .ndo_start_xmit = spider_net_xmit, 2202 .ndo_set_rx_mode = spider_net_set_multi, 2203 .ndo_set_mac_address = spider_net_set_mac, 2204 .ndo_do_ioctl = spider_net_do_ioctl, 2205 .ndo_tx_timeout = spider_net_tx_timeout, 2206 .ndo_validate_addr = eth_validate_addr, 2207 /* HW VLAN */ 2208 #ifdef CONFIG_NET_POLL_CONTROLLER 2209 /* poll controller */ 2210 .ndo_poll_controller = spider_net_poll_controller, 2211 #endif /* CONFIG_NET_POLL_CONTROLLER */ 2212 }; 2213 2214 /** 2215 * spider_net_setup_netdev_ops - initialization of net_device operations 2216 * @netdev: net_device structure 2217 * 2218 * fills out function pointers in the net_device structure 2219 */ 2220 static void 2221 spider_net_setup_netdev_ops(struct net_device *netdev) 2222 { 2223 netdev->netdev_ops = &spider_net_ops; 2224 netdev->watchdog_timeo = SPIDER_NET_WATCHDOG_TIMEOUT; 2225 /* ethtool ops */ 2226 netdev->ethtool_ops = &spider_net_ethtool_ops; 2227 } 2228 2229 /** 2230 * spider_net_setup_netdev - initialization of net_device 2231 * @card: card structure 2232 * 2233 * Returns 0 on success or <0 on failure 2234 * 2235 * spider_net_setup_netdev initializes the net_device structure 2236 **/ 2237 static int 2238 spider_net_setup_netdev(struct spider_net_card *card) 2239 { 2240 int result; 2241 struct net_device *netdev = card->netdev; 2242 struct device_node *dn; 2243 struct sockaddr addr; 2244 const u8 *mac; 2245 2246 SET_NETDEV_DEV(netdev, &card->pdev->dev); 2247 2248 pci_set_drvdata(card->pdev, netdev); 2249 2250 timer_setup(&card->tx_timer, spider_net_cleanup_tx_ring, 0); 2251 netdev->irq = card->pdev->irq; 2252 2253 card->aneg_count = 0; 2254 timer_setup(&card->aneg_timer, spider_net_link_phy, 0); 2255 2256 netif_napi_add(netdev, &card->napi, 2257 spider_net_poll, SPIDER_NET_NAPI_WEIGHT); 2258 2259 spider_net_setup_netdev_ops(netdev); 2260 2261 netdev->hw_features = NETIF_F_RXCSUM | NETIF_F_IP_CSUM; 2262 if (SPIDER_NET_RX_CSUM_DEFAULT) 2263 netdev->features |= NETIF_F_RXCSUM; 2264 netdev->features |= NETIF_F_IP_CSUM | NETIF_F_LLTX; 2265 /* some time: NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX | 2266 * NETIF_F_HW_VLAN_CTAG_FILTER */ 2267 2268 /* MTU range: 64 - 2294 */ 2269 netdev->min_mtu = SPIDER_NET_MIN_MTU; 2270 netdev->max_mtu = SPIDER_NET_MAX_MTU; 2271 2272 netdev->irq = card->pdev->irq; 2273 card->num_rx_ints = 0; 2274 card->ignore_rx_ramfull = 0; 2275 2276 dn = pci_device_to_OF_node(card->pdev); 2277 if (!dn) 2278 return -EIO; 2279 2280 mac = of_get_property(dn, "local-mac-address", NULL); 2281 if (!mac) 2282 return -EIO; 2283 memcpy(addr.sa_data, mac, ETH_ALEN); 2284 2285 result = spider_net_set_mac(netdev, &addr); 2286 if ((result) && (netif_msg_probe(card))) 2287 dev_err(&card->netdev->dev, 2288 "Failed to set MAC address: %i\n", result); 2289 2290 result = register_netdev(netdev); 2291 if (result) { 2292 if (netif_msg_probe(card)) 2293 dev_err(&card->netdev->dev, 2294 "Couldn't register net_device: %i\n", result); 2295 return result; 2296 } 2297 2298 if (netif_msg_probe(card)) 2299 pr_info("Initialized device %s.\n", netdev->name); 2300 2301 return 0; 2302 } 2303 2304 /** 2305 * spider_net_alloc_card - allocates net_device and card structure 2306 * 2307 * returns the card structure or NULL in case of errors 2308 * 2309 * the card and net_device structures are linked to each other 2310 */ 2311 static struct spider_net_card * 2312 spider_net_alloc_card(void) 2313 { 2314 struct net_device *netdev; 2315 struct spider_net_card *card; 2316 2317 netdev = alloc_etherdev(struct_size(card, darray, 2318 tx_descriptors + rx_descriptors)); 2319 if (!netdev) 2320 return NULL; 2321 2322 card = netdev_priv(netdev); 2323 card->netdev = netdev; 2324 card->msg_enable = SPIDER_NET_DEFAULT_MSG; 2325 INIT_WORK(&card->tx_timeout_task, spider_net_tx_timeout_task); 2326 init_waitqueue_head(&card->waitq); 2327 atomic_set(&card->tx_timeout_task_counter, 0); 2328 2329 card->rx_chain.num_desc = rx_descriptors; 2330 card->rx_chain.ring = card->darray; 2331 card->tx_chain.num_desc = tx_descriptors; 2332 card->tx_chain.ring = card->darray + rx_descriptors; 2333 2334 return card; 2335 } 2336 2337 /** 2338 * spider_net_undo_pci_setup - releases PCI ressources 2339 * @card: card structure 2340 * 2341 * spider_net_undo_pci_setup releases the mapped regions 2342 */ 2343 static void 2344 spider_net_undo_pci_setup(struct spider_net_card *card) 2345 { 2346 iounmap(card->regs); 2347 pci_release_regions(card->pdev); 2348 } 2349 2350 /** 2351 * spider_net_setup_pci_dev - sets up the device in terms of PCI operations 2352 * @pdev: PCI device 2353 * 2354 * Returns the card structure or NULL if any errors occur 2355 * 2356 * spider_net_setup_pci_dev initializes pdev and together with the 2357 * functions called in spider_net_open configures the device so that 2358 * data can be transferred over it 2359 * The net_device structure is attached to the card structure, if the 2360 * function returns without error. 2361 **/ 2362 static struct spider_net_card * 2363 spider_net_setup_pci_dev(struct pci_dev *pdev) 2364 { 2365 struct spider_net_card *card; 2366 unsigned long mmio_start, mmio_len; 2367 2368 if (pci_enable_device(pdev)) { 2369 dev_err(&pdev->dev, "Couldn't enable PCI device\n"); 2370 return NULL; 2371 } 2372 2373 if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) { 2374 dev_err(&pdev->dev, 2375 "Couldn't find proper PCI device base address.\n"); 2376 goto out_disable_dev; 2377 } 2378 2379 if (pci_request_regions(pdev, spider_net_driver_name)) { 2380 dev_err(&pdev->dev, 2381 "Couldn't obtain PCI resources, aborting.\n"); 2382 goto out_disable_dev; 2383 } 2384 2385 pci_set_master(pdev); 2386 2387 card = spider_net_alloc_card(); 2388 if (!card) { 2389 dev_err(&pdev->dev, 2390 "Couldn't allocate net_device structure, aborting.\n"); 2391 goto out_release_regions; 2392 } 2393 card->pdev = pdev; 2394 2395 /* fetch base address and length of first resource */ 2396 mmio_start = pci_resource_start(pdev, 0); 2397 mmio_len = pci_resource_len(pdev, 0); 2398 2399 card->netdev->mem_start = mmio_start; 2400 card->netdev->mem_end = mmio_start + mmio_len; 2401 card->regs = ioremap(mmio_start, mmio_len); 2402 2403 if (!card->regs) { 2404 dev_err(&pdev->dev, 2405 "Couldn't obtain PCI resources, aborting.\n"); 2406 goto out_release_regions; 2407 } 2408 2409 return card; 2410 2411 out_release_regions: 2412 pci_release_regions(pdev); 2413 out_disable_dev: 2414 pci_disable_device(pdev); 2415 return NULL; 2416 } 2417 2418 /** 2419 * spider_net_probe - initialization of a device 2420 * @pdev: PCI device 2421 * @ent: entry in the device id list 2422 * 2423 * Returns 0 on success, <0 on failure 2424 * 2425 * spider_net_probe initializes pdev and registers a net_device 2426 * structure for it. After that, the device can be ifconfig'ed up 2427 **/ 2428 static int 2429 spider_net_probe(struct pci_dev *pdev, const struct pci_device_id *ent) 2430 { 2431 int err = -EIO; 2432 struct spider_net_card *card; 2433 2434 card = spider_net_setup_pci_dev(pdev); 2435 if (!card) 2436 goto out; 2437 2438 spider_net_workaround_rxramfull(card); 2439 spider_net_init_card(card); 2440 2441 err = spider_net_setup_phy(card); 2442 if (err) 2443 goto out_undo_pci; 2444 2445 err = spider_net_setup_netdev(card); 2446 if (err) 2447 goto out_undo_pci; 2448 2449 return 0; 2450 2451 out_undo_pci: 2452 spider_net_undo_pci_setup(card); 2453 free_netdev(card->netdev); 2454 out: 2455 return err; 2456 } 2457 2458 /** 2459 * spider_net_remove - removal of a device 2460 * @pdev: PCI device 2461 * 2462 * Returns 0 on success, <0 on failure 2463 * 2464 * spider_net_remove is called to remove the device and unregisters the 2465 * net_device 2466 **/ 2467 static void 2468 spider_net_remove(struct pci_dev *pdev) 2469 { 2470 struct net_device *netdev; 2471 struct spider_net_card *card; 2472 2473 netdev = pci_get_drvdata(pdev); 2474 card = netdev_priv(netdev); 2475 2476 wait_event(card->waitq, 2477 atomic_read(&card->tx_timeout_task_counter) == 0); 2478 2479 unregister_netdev(netdev); 2480 2481 /* switch off card */ 2482 spider_net_write_reg(card, SPIDER_NET_CKRCTRL, 2483 SPIDER_NET_CKRCTRL_STOP_VALUE); 2484 spider_net_write_reg(card, SPIDER_NET_CKRCTRL, 2485 SPIDER_NET_CKRCTRL_RUN_VALUE); 2486 2487 spider_net_undo_pci_setup(card); 2488 free_netdev(netdev); 2489 } 2490 2491 static struct pci_driver spider_net_driver = { 2492 .name = spider_net_driver_name, 2493 .id_table = spider_net_pci_tbl, 2494 .probe = spider_net_probe, 2495 .remove = spider_net_remove 2496 }; 2497 2498 /** 2499 * spider_net_init - init function when the driver is loaded 2500 * 2501 * spider_net_init registers the device driver 2502 */ 2503 static int __init spider_net_init(void) 2504 { 2505 printk(KERN_INFO "Spidernet version %s.\n", VERSION); 2506 2507 if (rx_descriptors < SPIDER_NET_RX_DESCRIPTORS_MIN) { 2508 rx_descriptors = SPIDER_NET_RX_DESCRIPTORS_MIN; 2509 pr_info("adjusting rx descriptors to %i.\n", rx_descriptors); 2510 } 2511 if (rx_descriptors > SPIDER_NET_RX_DESCRIPTORS_MAX) { 2512 rx_descriptors = SPIDER_NET_RX_DESCRIPTORS_MAX; 2513 pr_info("adjusting rx descriptors to %i.\n", rx_descriptors); 2514 } 2515 if (tx_descriptors < SPIDER_NET_TX_DESCRIPTORS_MIN) { 2516 tx_descriptors = SPIDER_NET_TX_DESCRIPTORS_MIN; 2517 pr_info("adjusting tx descriptors to %i.\n", tx_descriptors); 2518 } 2519 if (tx_descriptors > SPIDER_NET_TX_DESCRIPTORS_MAX) { 2520 tx_descriptors = SPIDER_NET_TX_DESCRIPTORS_MAX; 2521 pr_info("adjusting tx descriptors to %i.\n", tx_descriptors); 2522 } 2523 2524 return pci_register_driver(&spider_net_driver); 2525 } 2526 2527 /** 2528 * spider_net_cleanup - exit function when driver is unloaded 2529 * 2530 * spider_net_cleanup unregisters the device driver 2531 */ 2532 static void __exit spider_net_cleanup(void) 2533 { 2534 pci_unregister_driver(&spider_net_driver); 2535 } 2536 2537 module_init(spider_net_init); 2538 module_exit(spider_net_cleanup); 2539