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