/drivers/net/ethernet/sgi/ioc3-eth.c
C | 1284 lines | 940 code | 230 blank | 114 comment | 109 complexity | ff63435f56f3c3b75afc136fa4eb56e0 MD5 | raw file
1// SPDX-License-Identifier: GPL-2.0 2/* Driver for SGI's IOC3 based Ethernet cards as found in the PCI card. 3 * 4 * Copyright (C) 1999, 2000, 01, 03, 06 Ralf Baechle 5 * Copyright (C) 1995, 1999, 2000, 2001 by Silicon Graphics, Inc. 6 * 7 * References: 8 * o IOC3 ASIC specification 4.51, 1996-04-18 9 * o IEEE 802.3 specification, 2000 edition 10 * o DP38840A Specification, National Semiconductor, March 1997 11 * 12 * To do: 13 * 14 * o Use prefetching for large packets. What is a good lower limit for 15 * prefetching? 16 * o Use hardware checksums. 17 * o Which PHYs might possibly be attached to the IOC3 in real live, 18 * which workarounds are required for them? Do we ever have Lucent's? 19 * o For the 2.5 branch kill the mii-tool ioctls. 20 */ 21 22#define IOC3_NAME "ioc3-eth" 23#define IOC3_VERSION "2.6.3-4" 24 25#include <linux/delay.h> 26#include <linux/kernel.h> 27#include <linux/mm.h> 28#include <linux/errno.h> 29#include <linux/module.h> 30#include <linux/init.h> 31#include <linux/crc16.h> 32#include <linux/crc32.h> 33#include <linux/mii.h> 34#include <linux/in.h> 35#include <linux/io.h> 36#include <linux/ip.h> 37#include <linux/tcp.h> 38#include <linux/udp.h> 39#include <linux/gfp.h> 40#include <linux/netdevice.h> 41#include <linux/etherdevice.h> 42#include <linux/ethtool.h> 43#include <linux/skbuff.h> 44#include <linux/dma-mapping.h> 45#include <linux/platform_device.h> 46#include <linux/nvmem-consumer.h> 47 48#include <net/ip.h> 49 50#include <asm/sn/ioc3.h> 51#include <asm/pci/bridge.h> 52 53#define CRC16_INIT 0 54#define CRC16_VALID 0xb001 55 56/* Number of RX buffers. This is tunable in the range of 16 <= x < 512. 57 * The value must be a power of two. 58 */ 59#define RX_BUFFS 64 60#define RX_RING_ENTRIES 512 /* fixed in hardware */ 61#define RX_RING_MASK (RX_RING_ENTRIES - 1) 62#define RX_RING_SIZE (RX_RING_ENTRIES * sizeof(u64)) 63 64/* 128 TX buffers (not tunable) */ 65#define TX_RING_ENTRIES 128 66#define TX_RING_MASK (TX_RING_ENTRIES - 1) 67#define TX_RING_SIZE (TX_RING_ENTRIES * sizeof(struct ioc3_etxd)) 68 69/* IOC3 does dma transfers in 128 byte blocks */ 70#define IOC3_DMA_XFER_LEN 128UL 71 72/* Every RX buffer starts with 8 byte descriptor data */ 73#define RX_OFFSET (sizeof(struct ioc3_erxbuf) + NET_IP_ALIGN) 74#define RX_BUF_SIZE (13 * IOC3_DMA_XFER_LEN) 75 76#define ETCSR_FD ((21 << ETCSR_IPGR2_SHIFT) | (21 << ETCSR_IPGR1_SHIFT) | 21) 77#define ETCSR_HD ((17 << ETCSR_IPGR2_SHIFT) | (11 << ETCSR_IPGR1_SHIFT) | 21) 78 79/* Private per NIC data of the driver. */ 80struct ioc3_private { 81 struct ioc3_ethregs *regs; 82 struct device *dma_dev; 83 u32 *ssram; 84 unsigned long *rxr; /* pointer to receiver ring */ 85 void *tx_ring; 86 struct ioc3_etxd *txr; 87 dma_addr_t rxr_dma; 88 dma_addr_t txr_dma; 89 struct sk_buff *rx_skbs[RX_RING_ENTRIES]; 90 struct sk_buff *tx_skbs[TX_RING_ENTRIES]; 91 int rx_ci; /* RX consumer index */ 92 int rx_pi; /* RX producer index */ 93 int tx_ci; /* TX consumer index */ 94 int tx_pi; /* TX producer index */ 95 int txqlen; 96 u32 emcr, ehar_h, ehar_l; 97 spinlock_t ioc3_lock; 98 struct mii_if_info mii; 99 100 /* Members used by autonegotiation */ 101 struct timer_list ioc3_timer; 102}; 103 104static int ioc3_ioctl(struct net_device *dev, struct ifreq *rq, int cmd); 105static void ioc3_set_multicast_list(struct net_device *dev); 106static netdev_tx_t ioc3_start_xmit(struct sk_buff *skb, struct net_device *dev); 107static void ioc3_timeout(struct net_device *dev, unsigned int txqueue); 108static inline unsigned int ioc3_hash(const unsigned char *addr); 109static void ioc3_start(struct ioc3_private *ip); 110static inline void ioc3_stop(struct ioc3_private *ip); 111static void ioc3_init(struct net_device *dev); 112static int ioc3_alloc_rx_bufs(struct net_device *dev); 113static void ioc3_free_rx_bufs(struct ioc3_private *ip); 114static inline void ioc3_clean_tx_ring(struct ioc3_private *ip); 115 116static const struct ethtool_ops ioc3_ethtool_ops; 117 118static inline unsigned long aligned_rx_skb_addr(unsigned long addr) 119{ 120 return (~addr + 1) & (IOC3_DMA_XFER_LEN - 1UL); 121} 122 123static inline int ioc3_alloc_skb(struct ioc3_private *ip, struct sk_buff **skb, 124 struct ioc3_erxbuf **rxb, dma_addr_t *rxb_dma) 125{ 126 struct sk_buff *new_skb; 127 dma_addr_t d; 128 int offset; 129 130 new_skb = alloc_skb(RX_BUF_SIZE + IOC3_DMA_XFER_LEN - 1, GFP_ATOMIC); 131 if (!new_skb) 132 return -ENOMEM; 133 134 /* ensure buffer is aligned to IOC3_DMA_XFER_LEN */ 135 offset = aligned_rx_skb_addr((unsigned long)new_skb->data); 136 if (offset) 137 skb_reserve(new_skb, offset); 138 139 d = dma_map_single(ip->dma_dev, new_skb->data, 140 RX_BUF_SIZE, DMA_FROM_DEVICE); 141 142 if (dma_mapping_error(ip->dma_dev, d)) { 143 dev_kfree_skb_any(new_skb); 144 return -ENOMEM; 145 } 146 *rxb_dma = d; 147 *rxb = (struct ioc3_erxbuf *)new_skb->data; 148 skb_reserve(new_skb, RX_OFFSET); 149 *skb = new_skb; 150 151 return 0; 152} 153 154#ifdef CONFIG_PCI_XTALK_BRIDGE 155static inline unsigned long ioc3_map(dma_addr_t addr, unsigned long attr) 156{ 157 return (addr & ~PCI64_ATTR_BAR) | attr; 158} 159 160#define ERBAR_VAL (ERBAR_BARRIER_BIT << ERBAR_RXBARR_SHIFT) 161#else 162static inline unsigned long ioc3_map(dma_addr_t addr, unsigned long attr) 163{ 164 return addr; 165} 166 167#define ERBAR_VAL 0 168#endif 169 170static int ioc3eth_nvmem_match(struct device *dev, const void *data) 171{ 172 const char *name = dev_name(dev); 173 const char *prefix = data; 174 int prefix_len; 175 176 prefix_len = strlen(prefix); 177 if (strlen(name) < (prefix_len + 3)) 178 return 0; 179 180 if (memcmp(prefix, name, prefix_len) != 0) 181 return 0; 182 183 /* found nvmem device which is attached to our ioc3 184 * now check for one wire family code 09, 89 and 91 185 */ 186 if (memcmp(name + prefix_len, "09-", 3) == 0) 187 return 1; 188 if (memcmp(name + prefix_len, "89-", 3) == 0) 189 return 1; 190 if (memcmp(name + prefix_len, "91-", 3) == 0) 191 return 1; 192 193 return 0; 194} 195 196static int ioc3eth_get_mac_addr(struct resource *res, u8 mac_addr[6]) 197{ 198 struct nvmem_device *nvmem; 199 char prefix[24]; 200 u8 prom[16]; 201 int ret; 202 int i; 203 204 snprintf(prefix, sizeof(prefix), "ioc3-%012llx-", 205 res->start & ~0xffff); 206 207 nvmem = nvmem_device_find(prefix, ioc3eth_nvmem_match); 208 if (IS_ERR(nvmem)) 209 return PTR_ERR(nvmem); 210 211 ret = nvmem_device_read(nvmem, 0, 16, prom); 212 nvmem_device_put(nvmem); 213 if (ret < 0) 214 return ret; 215 216 /* check, if content is valid */ 217 if (prom[0] != 0x0a || 218 crc16(CRC16_INIT, prom, 13) != CRC16_VALID) 219 return -EINVAL; 220 221 for (i = 0; i < 6; i++) 222 mac_addr[i] = prom[10 - i]; 223 224 return 0; 225} 226 227static void __ioc3_set_mac_address(struct net_device *dev) 228{ 229 struct ioc3_private *ip = netdev_priv(dev); 230 231 writel((dev->dev_addr[5] << 8) | 232 dev->dev_addr[4], 233 &ip->regs->emar_h); 234 writel((dev->dev_addr[3] << 24) | 235 (dev->dev_addr[2] << 16) | 236 (dev->dev_addr[1] << 8) | 237 dev->dev_addr[0], 238 &ip->regs->emar_l); 239} 240 241static int ioc3_set_mac_address(struct net_device *dev, void *addr) 242{ 243 struct ioc3_private *ip = netdev_priv(dev); 244 struct sockaddr *sa = addr; 245 246 memcpy(dev->dev_addr, sa->sa_data, dev->addr_len); 247 248 spin_lock_irq(&ip->ioc3_lock); 249 __ioc3_set_mac_address(dev); 250 spin_unlock_irq(&ip->ioc3_lock); 251 252 return 0; 253} 254 255/* Caller must hold the ioc3_lock ever for MII readers. This is also 256 * used to protect the transmitter side but it's low contention. 257 */ 258static int ioc3_mdio_read(struct net_device *dev, int phy, int reg) 259{ 260 struct ioc3_private *ip = netdev_priv(dev); 261 struct ioc3_ethregs *regs = ip->regs; 262 263 while (readl(®s->micr) & MICR_BUSY) 264 ; 265 writel((phy << MICR_PHYADDR_SHIFT) | reg | MICR_READTRIG, 266 ®s->micr); 267 while (readl(®s->micr) & MICR_BUSY) 268 ; 269 270 return readl(®s->midr_r) & MIDR_DATA_MASK; 271} 272 273static void ioc3_mdio_write(struct net_device *dev, int phy, int reg, int data) 274{ 275 struct ioc3_private *ip = netdev_priv(dev); 276 struct ioc3_ethregs *regs = ip->regs; 277 278 while (readl(®s->micr) & MICR_BUSY) 279 ; 280 writel(data, ®s->midr_w); 281 writel((phy << MICR_PHYADDR_SHIFT) | reg, ®s->micr); 282 while (readl(®s->micr) & MICR_BUSY) 283 ; 284} 285 286static int ioc3_mii_init(struct ioc3_private *ip); 287 288static struct net_device_stats *ioc3_get_stats(struct net_device *dev) 289{ 290 struct ioc3_private *ip = netdev_priv(dev); 291 struct ioc3_ethregs *regs = ip->regs; 292 293 dev->stats.collisions += readl(®s->etcdc) & ETCDC_COLLCNT_MASK; 294 return &dev->stats; 295} 296 297static void ioc3_tcpudp_checksum(struct sk_buff *skb, u32 hwsum, int len) 298{ 299 struct ethhdr *eh = eth_hdr(skb); 300 unsigned int proto; 301 unsigned char *cp; 302 struct iphdr *ih; 303 u32 csum, ehsum; 304 u16 *ew; 305 306 /* Did hardware handle the checksum at all? The cases we can handle 307 * are: 308 * 309 * - TCP and UDP checksums of IPv4 only. 310 * - IPv6 would be doable but we keep that for later ... 311 * - Only unfragmented packets. Did somebody already tell you 312 * fragmentation is evil? 313 * - don't care about packet size. Worst case when processing a 314 * malformed packet we'll try to access the packet at ip header + 315 * 64 bytes which is still inside the skb. Even in the unlikely 316 * case where the checksum is right the higher layers will still 317 * drop the packet as appropriate. 318 */ 319 if (eh->h_proto != htons(ETH_P_IP)) 320 return; 321 322 ih = (struct iphdr *)((char *)eh + ETH_HLEN); 323 if (ip_is_fragment(ih)) 324 return; 325 326 proto = ih->protocol; 327 if (proto != IPPROTO_TCP && proto != IPPROTO_UDP) 328 return; 329 330 /* Same as tx - compute csum of pseudo header */ 331 csum = hwsum + 332 (ih->tot_len - (ih->ihl << 2)) + 333 htons((u16)ih->protocol) + 334 (ih->saddr >> 16) + (ih->saddr & 0xffff) + 335 (ih->daddr >> 16) + (ih->daddr & 0xffff); 336 337 /* Sum up ethernet dest addr, src addr and protocol */ 338 ew = (u16 *)eh; 339 ehsum = ew[0] + ew[1] + ew[2] + ew[3] + ew[4] + ew[5] + ew[6]; 340 341 ehsum = (ehsum & 0xffff) + (ehsum >> 16); 342 ehsum = (ehsum & 0xffff) + (ehsum >> 16); 343 344 csum += 0xffff ^ ehsum; 345 346 /* In the next step we also subtract the 1's complement 347 * checksum of the trailing ethernet CRC. 348 */ 349 cp = (char *)eh + len; /* points at trailing CRC */ 350 if (len & 1) { 351 csum += 0xffff ^ (u16)((cp[1] << 8) | cp[0]); 352 csum += 0xffff ^ (u16)((cp[3] << 8) | cp[2]); 353 } else { 354 csum += 0xffff ^ (u16)((cp[0] << 8) | cp[1]); 355 csum += 0xffff ^ (u16)((cp[2] << 8) | cp[3]); 356 } 357 358 csum = (csum & 0xffff) + (csum >> 16); 359 csum = (csum & 0xffff) + (csum >> 16); 360 361 if (csum == 0xffff) 362 skb->ip_summed = CHECKSUM_UNNECESSARY; 363} 364 365static inline void ioc3_rx(struct net_device *dev) 366{ 367 struct ioc3_private *ip = netdev_priv(dev); 368 struct sk_buff *skb, *new_skb; 369 int rx_entry, n_entry, len; 370 struct ioc3_erxbuf *rxb; 371 unsigned long *rxr; 372 dma_addr_t d; 373 u32 w0, err; 374 375 rxr = ip->rxr; /* Ring base */ 376 rx_entry = ip->rx_ci; /* RX consume index */ 377 n_entry = ip->rx_pi; 378 379 skb = ip->rx_skbs[rx_entry]; 380 rxb = (struct ioc3_erxbuf *)(skb->data - RX_OFFSET); 381 w0 = be32_to_cpu(rxb->w0); 382 383 while (w0 & ERXBUF_V) { 384 err = be32_to_cpu(rxb->err); /* It's valid ... */ 385 if (err & ERXBUF_GOODPKT) { 386 len = ((w0 >> ERXBUF_BYTECNT_SHIFT) & 0x7ff) - 4; 387 skb_put(skb, len); 388 skb->protocol = eth_type_trans(skb, dev); 389 390 if (ioc3_alloc_skb(ip, &new_skb, &rxb, &d)) { 391 /* Ouch, drop packet and just recycle packet 392 * to keep the ring filled. 393 */ 394 dev->stats.rx_dropped++; 395 new_skb = skb; 396 d = rxr[rx_entry]; 397 goto next; 398 } 399 400 if (likely(dev->features & NETIF_F_RXCSUM)) 401 ioc3_tcpudp_checksum(skb, 402 w0 & ERXBUF_IPCKSUM_MASK, 403 len); 404 405 dma_unmap_single(ip->dma_dev, rxr[rx_entry], 406 RX_BUF_SIZE, DMA_FROM_DEVICE); 407 408 netif_rx(skb); 409 410 ip->rx_skbs[rx_entry] = NULL; /* Poison */ 411 412 dev->stats.rx_packets++; /* Statistics */ 413 dev->stats.rx_bytes += len; 414 } else { 415 /* The frame is invalid and the skb never 416 * reached the network layer so we can just 417 * recycle it. 418 */ 419 new_skb = skb; 420 d = rxr[rx_entry]; 421 dev->stats.rx_errors++; 422 } 423 if (err & ERXBUF_CRCERR) /* Statistics */ 424 dev->stats.rx_crc_errors++; 425 if (err & ERXBUF_FRAMERR) 426 dev->stats.rx_frame_errors++; 427 428next: 429 ip->rx_skbs[n_entry] = new_skb; 430 rxr[n_entry] = cpu_to_be64(ioc3_map(d, PCI64_ATTR_BAR)); 431 rxb->w0 = 0; /* Clear valid flag */ 432 n_entry = (n_entry + 1) & RX_RING_MASK; /* Update erpir */ 433 434 /* Now go on to the next ring entry. */ 435 rx_entry = (rx_entry + 1) & RX_RING_MASK; 436 skb = ip->rx_skbs[rx_entry]; 437 rxb = (struct ioc3_erxbuf *)(skb->data - RX_OFFSET); 438 w0 = be32_to_cpu(rxb->w0); 439 } 440 writel((n_entry << 3) | ERPIR_ARM, &ip->regs->erpir); 441 ip->rx_pi = n_entry; 442 ip->rx_ci = rx_entry; 443} 444 445static inline void ioc3_tx(struct net_device *dev) 446{ 447 struct ioc3_private *ip = netdev_priv(dev); 448 struct ioc3_ethregs *regs = ip->regs; 449 unsigned long packets, bytes; 450 int tx_entry, o_entry; 451 struct sk_buff *skb; 452 u32 etcir; 453 454 spin_lock(&ip->ioc3_lock); 455 etcir = readl(®s->etcir); 456 457 tx_entry = (etcir >> 7) & TX_RING_MASK; 458 o_entry = ip->tx_ci; 459 packets = 0; 460 bytes = 0; 461 462 while (o_entry != tx_entry) { 463 packets++; 464 skb = ip->tx_skbs[o_entry]; 465 bytes += skb->len; 466 dev_consume_skb_irq(skb); 467 ip->tx_skbs[o_entry] = NULL; 468 469 o_entry = (o_entry + 1) & TX_RING_MASK; /* Next */ 470 471 etcir = readl(®s->etcir); /* More pkts sent? */ 472 tx_entry = (etcir >> 7) & TX_RING_MASK; 473 } 474 475 dev->stats.tx_packets += packets; 476 dev->stats.tx_bytes += bytes; 477 ip->txqlen -= packets; 478 479 if (netif_queue_stopped(dev) && ip->txqlen < TX_RING_ENTRIES) 480 netif_wake_queue(dev); 481 482 ip->tx_ci = o_entry; 483 spin_unlock(&ip->ioc3_lock); 484} 485 486/* Deal with fatal IOC3 errors. This condition might be caused by a hard or 487 * software problems, so we should try to recover 488 * more gracefully if this ever happens. In theory we might be flooded 489 * with such error interrupts if something really goes wrong, so we might 490 * also consider to take the interface down. 491 */ 492static void ioc3_error(struct net_device *dev, u32 eisr) 493{ 494 struct ioc3_private *ip = netdev_priv(dev); 495 496 spin_lock(&ip->ioc3_lock); 497 498 if (eisr & EISR_RXOFLO) 499 net_err_ratelimited("%s: RX overflow.\n", dev->name); 500 if (eisr & EISR_RXBUFOFLO) 501 net_err_ratelimited("%s: RX buffer overflow.\n", dev->name); 502 if (eisr & EISR_RXMEMERR) 503 net_err_ratelimited("%s: RX PCI error.\n", dev->name); 504 if (eisr & EISR_RXPARERR) 505 net_err_ratelimited("%s: RX SSRAM parity error.\n", dev->name); 506 if (eisr & EISR_TXBUFUFLO) 507 net_err_ratelimited("%s: TX buffer underflow.\n", dev->name); 508 if (eisr & EISR_TXMEMERR) 509 net_err_ratelimited("%s: TX PCI error.\n", dev->name); 510 511 ioc3_stop(ip); 512 ioc3_free_rx_bufs(ip); 513 ioc3_clean_tx_ring(ip); 514 515 ioc3_init(dev); 516 if (ioc3_alloc_rx_bufs(dev)) { 517 netdev_err(dev, "%s: rx buffer allocation failed\n", __func__); 518 spin_unlock(&ip->ioc3_lock); 519 return; 520 } 521 ioc3_start(ip); 522 ioc3_mii_init(ip); 523 524 netif_wake_queue(dev); 525 526 spin_unlock(&ip->ioc3_lock); 527} 528 529/* The interrupt handler does all of the Rx thread work and cleans up 530 * after the Tx thread. 531 */ 532static irqreturn_t ioc3_interrupt(int irq, void *dev_id) 533{ 534 struct ioc3_private *ip = netdev_priv(dev_id); 535 struct ioc3_ethregs *regs = ip->regs; 536 u32 eisr; 537 538 eisr = readl(®s->eisr); 539 writel(eisr, ®s->eisr); 540 readl(®s->eisr); /* Flush */ 541 542 if (eisr & (EISR_RXOFLO | EISR_RXBUFOFLO | EISR_RXMEMERR | 543 EISR_RXPARERR | EISR_TXBUFUFLO | EISR_TXMEMERR)) 544 ioc3_error(dev_id, eisr); 545 if (eisr & EISR_RXTIMERINT) 546 ioc3_rx(dev_id); 547 if (eisr & EISR_TXEXPLICIT) 548 ioc3_tx(dev_id); 549 550 return IRQ_HANDLED; 551} 552 553static inline void ioc3_setup_duplex(struct ioc3_private *ip) 554{ 555 struct ioc3_ethregs *regs = ip->regs; 556 557 spin_lock_irq(&ip->ioc3_lock); 558 559 if (ip->mii.full_duplex) { 560 writel(ETCSR_FD, ®s->etcsr); 561 ip->emcr |= EMCR_DUPLEX; 562 } else { 563 writel(ETCSR_HD, ®s->etcsr); 564 ip->emcr &= ~EMCR_DUPLEX; 565 } 566 writel(ip->emcr, ®s->emcr); 567 568 spin_unlock_irq(&ip->ioc3_lock); 569} 570 571static void ioc3_timer(struct timer_list *t) 572{ 573 struct ioc3_private *ip = from_timer(ip, t, ioc3_timer); 574 575 /* Print the link status if it has changed */ 576 mii_check_media(&ip->mii, 1, 0); 577 ioc3_setup_duplex(ip); 578 579 ip->ioc3_timer.expires = jiffies + ((12 * HZ) / 10); /* 1.2s */ 580 add_timer(&ip->ioc3_timer); 581} 582 583/* Try to find a PHY. There is no apparent relation between the MII addresses 584 * in the SGI documentation and what we find in reality, so we simply probe 585 * for the PHY. 586 */ 587static int ioc3_mii_init(struct ioc3_private *ip) 588{ 589 u16 word; 590 int i; 591 592 for (i = 0; i < 32; i++) { 593 word = ioc3_mdio_read(ip->mii.dev, i, MII_PHYSID1); 594 595 if (word != 0xffff && word != 0x0000) { 596 ip->mii.phy_id = i; 597 return 0; 598 } 599 } 600 ip->mii.phy_id = -1; 601 return -ENODEV; 602} 603 604static void ioc3_mii_start(struct ioc3_private *ip) 605{ 606 ip->ioc3_timer.expires = jiffies + (12 * HZ) / 10; /* 1.2 sec. */ 607 add_timer(&ip->ioc3_timer); 608} 609 610static inline void ioc3_tx_unmap(struct ioc3_private *ip, int entry) 611{ 612 struct ioc3_etxd *desc; 613 u32 cmd, bufcnt, len; 614 615 desc = &ip->txr[entry]; 616 cmd = be32_to_cpu(desc->cmd); 617 bufcnt = be32_to_cpu(desc->bufcnt); 618 if (cmd & ETXD_B1V) { 619 len = (bufcnt & ETXD_B1CNT_MASK) >> ETXD_B1CNT_SHIFT; 620 dma_unmap_single(ip->dma_dev, be64_to_cpu(desc->p1), 621 len, DMA_TO_DEVICE); 622 } 623 if (cmd & ETXD_B2V) { 624 len = (bufcnt & ETXD_B2CNT_MASK) >> ETXD_B2CNT_SHIFT; 625 dma_unmap_single(ip->dma_dev, be64_to_cpu(desc->p2), 626 len, DMA_TO_DEVICE); 627 } 628} 629 630static inline void ioc3_clean_tx_ring(struct ioc3_private *ip) 631{ 632 struct sk_buff *skb; 633 int i; 634 635 for (i = 0; i < TX_RING_ENTRIES; i++) { 636 skb = ip->tx_skbs[i]; 637 if (skb) { 638 ioc3_tx_unmap(ip, i); 639 ip->tx_skbs[i] = NULL; 640 dev_kfree_skb_any(skb); 641 } 642 ip->txr[i].cmd = 0; 643 } 644 ip->tx_pi = 0; 645 ip->tx_ci = 0; 646} 647 648static void ioc3_free_rx_bufs(struct ioc3_private *ip) 649{ 650 int rx_entry, n_entry; 651 struct sk_buff *skb; 652 653 n_entry = ip->rx_ci; 654 rx_entry = ip->rx_pi; 655 656 while (n_entry != rx_entry) { 657 skb = ip->rx_skbs[n_entry]; 658 if (skb) { 659 dma_unmap_single(ip->dma_dev, 660 be64_to_cpu(ip->rxr[n_entry]), 661 RX_BUF_SIZE, DMA_FROM_DEVICE); 662 dev_kfree_skb_any(skb); 663 } 664 n_entry = (n_entry + 1) & RX_RING_MASK; 665 } 666} 667 668static int ioc3_alloc_rx_bufs(struct net_device *dev) 669{ 670 struct ioc3_private *ip = netdev_priv(dev); 671 struct ioc3_erxbuf *rxb; 672 dma_addr_t d; 673 int i; 674 675 /* Now the rx buffers. The RX ring may be larger but 676 * we only allocate 16 buffers for now. Need to tune 677 * this for performance and memory later. 678 */ 679 for (i = 0; i < RX_BUFFS; i++) { 680 if (ioc3_alloc_skb(ip, &ip->rx_skbs[i], &rxb, &d)) 681 return -ENOMEM; 682 683 rxb->w0 = 0; /* Clear valid flag */ 684 ip->rxr[i] = cpu_to_be64(ioc3_map(d, PCI64_ATTR_BAR)); 685 } 686 ip->rx_ci = 0; 687 ip->rx_pi = RX_BUFFS; 688 689 return 0; 690} 691 692static inline void ioc3_ssram_disc(struct ioc3_private *ip) 693{ 694 struct ioc3_ethregs *regs = ip->regs; 695 u32 *ssram0 = &ip->ssram[0x0000]; 696 u32 *ssram1 = &ip->ssram[0x4000]; 697 u32 pattern = 0x5555; 698 699 /* Assume the larger size SSRAM and enable parity checking */ 700 writel(readl(®s->emcr) | (EMCR_BUFSIZ | EMCR_RAMPAR), ®s->emcr); 701 readl(®s->emcr); /* Flush */ 702 703 writel(pattern, ssram0); 704 writel(~pattern & IOC3_SSRAM_DM, ssram1); 705 706 if ((readl(ssram0) & IOC3_SSRAM_DM) != pattern || 707 (readl(ssram1) & IOC3_SSRAM_DM) != (~pattern & IOC3_SSRAM_DM)) { 708 /* set ssram size to 64 KB */ 709 ip->emcr |= EMCR_RAMPAR; 710 writel(readl(®s->emcr) & ~EMCR_BUFSIZ, ®s->emcr); 711 } else { 712 ip->emcr |= EMCR_BUFSIZ | EMCR_RAMPAR; 713 } 714} 715 716static void ioc3_init(struct net_device *dev) 717{ 718 struct ioc3_private *ip = netdev_priv(dev); 719 struct ioc3_ethregs *regs = ip->regs; 720 721 del_timer_sync(&ip->ioc3_timer); /* Kill if running */ 722 723 writel(EMCR_RST, ®s->emcr); /* Reset */ 724 readl(®s->emcr); /* Flush WB */ 725 udelay(4); /* Give it time ... */ 726 writel(0, ®s->emcr); 727 readl(®s->emcr); 728 729 /* Misc registers */ 730 writel(ERBAR_VAL, ®s->erbar); 731 readl(®s->etcdc); /* Clear on read */ 732 writel(15, ®s->ercsr); /* RX low watermark */ 733 writel(0, ®s->ertr); /* Interrupt immediately */ 734 __ioc3_set_mac_address(dev); 735 writel(ip->ehar_h, ®s->ehar_h); 736 writel(ip->ehar_l, ®s->ehar_l); 737 writel(42, ®s->ersr); /* XXX should be random */ 738} 739 740static void ioc3_start(struct ioc3_private *ip) 741{ 742 struct ioc3_ethregs *regs = ip->regs; 743 unsigned long ring; 744 745 /* Now the rx ring base, consume & produce registers. */ 746 ring = ioc3_map(ip->rxr_dma, PCI64_ATTR_PREC); 747 writel(ring >> 32, ®s->erbr_h); 748 writel(ring & 0xffffffff, ®s->erbr_l); 749 writel(ip->rx_ci << 3, ®s->ercir); 750 writel((ip->rx_pi << 3) | ERPIR_ARM, ®s->erpir); 751 752 ring = ioc3_map(ip->txr_dma, PCI64_ATTR_PREC); 753 754 ip->txqlen = 0; /* nothing queued */ 755 756 /* Now the tx ring base, consume & produce registers. */ 757 writel(ring >> 32, ®s->etbr_h); 758 writel(ring & 0xffffffff, ®s->etbr_l); 759 writel(ip->tx_pi << 7, ®s->etpir); 760 writel(ip->tx_ci << 7, ®s->etcir); 761 readl(®s->etcir); /* Flush */ 762 763 ip->emcr |= ((RX_OFFSET / 2) << EMCR_RXOFF_SHIFT) | EMCR_TXDMAEN | 764 EMCR_TXEN | EMCR_RXDMAEN | EMCR_RXEN | EMCR_PADEN; 765 writel(ip->emcr, ®s->emcr); 766 writel(EISR_RXTIMERINT | EISR_RXOFLO | EISR_RXBUFOFLO | 767 EISR_RXMEMERR | EISR_RXPARERR | EISR_TXBUFUFLO | 768 EISR_TXEXPLICIT | EISR_TXMEMERR, ®s->eier); 769 readl(®s->eier); 770} 771 772static inline void ioc3_stop(struct ioc3_private *ip) 773{ 774 struct ioc3_ethregs *regs = ip->regs; 775 776 writel(0, ®s->emcr); /* Shutup */ 777 writel(0, ®s->eier); /* Disable interrupts */ 778 readl(®s->eier); /* Flush */ 779} 780 781static int ioc3_open(struct net_device *dev) 782{ 783 struct ioc3_private *ip = netdev_priv(dev); 784 785 ip->ehar_h = 0; 786 ip->ehar_l = 0; 787 788 ioc3_init(dev); 789 if (ioc3_alloc_rx_bufs(dev)) { 790 netdev_err(dev, "%s: rx buffer allocation failed\n", __func__); 791 return -ENOMEM; 792 } 793 ioc3_start(ip); 794 ioc3_mii_start(ip); 795 796 netif_start_queue(dev); 797 return 0; 798} 799 800static int ioc3_close(struct net_device *dev) 801{ 802 struct ioc3_private *ip = netdev_priv(dev); 803 804 del_timer_sync(&ip->ioc3_timer); 805 806 netif_stop_queue(dev); 807 808 ioc3_stop(ip); 809 810 ioc3_free_rx_bufs(ip); 811 ioc3_clean_tx_ring(ip); 812 813 return 0; 814} 815 816static const struct net_device_ops ioc3_netdev_ops = { 817 .ndo_open = ioc3_open, 818 .ndo_stop = ioc3_close, 819 .ndo_start_xmit = ioc3_start_xmit, 820 .ndo_tx_timeout = ioc3_timeout, 821 .ndo_get_stats = ioc3_get_stats, 822 .ndo_set_rx_mode = ioc3_set_multicast_list, 823 .ndo_do_ioctl = ioc3_ioctl, 824 .ndo_validate_addr = eth_validate_addr, 825 .ndo_set_mac_address = ioc3_set_mac_address, 826}; 827 828static int ioc3eth_probe(struct platform_device *pdev) 829{ 830 u32 sw_physid1, sw_physid2, vendor, model, rev; 831 struct ioc3_private *ip; 832 struct net_device *dev; 833 struct resource *regs; 834 u8 mac_addr[6]; 835 int err; 836 837 regs = platform_get_resource(pdev, IORESOURCE_MEM, 0); 838 /* get mac addr from one wire prom */ 839 if (ioc3eth_get_mac_addr(regs, mac_addr)) 840 return -EPROBE_DEFER; /* not available yet */ 841 842 dev = alloc_etherdev(sizeof(struct ioc3_private)); 843 if (!dev) 844 return -ENOMEM; 845 846 SET_NETDEV_DEV(dev, &pdev->dev); 847 848 ip = netdev_priv(dev); 849 ip->dma_dev = pdev->dev.parent; 850 ip->regs = devm_platform_ioremap_resource(pdev, 0); 851 if (!ip->regs) { 852 err = -ENOMEM; 853 goto out_free; 854 } 855 856 ip->ssram = devm_platform_ioremap_resource(pdev, 1); 857 if (!ip->ssram) { 858 err = -ENOMEM; 859 goto out_free; 860 } 861 862 dev->irq = platform_get_irq(pdev, 0); 863 if (dev->irq < 0) { 864 err = dev->irq; 865 goto out_free; 866 } 867 868 if (devm_request_irq(&pdev->dev, dev->irq, ioc3_interrupt, 869 IRQF_SHARED, "ioc3-eth", dev)) { 870 dev_err(&pdev->dev, "Can't get irq %d\n", dev->irq); 871 err = -ENODEV; 872 goto out_free; 873 } 874 875 spin_lock_init(&ip->ioc3_lock); 876 timer_setup(&ip->ioc3_timer, ioc3_timer, 0); 877 878 ioc3_stop(ip); 879 880 /* Allocate rx ring. 4kb = 512 entries, must be 4kb aligned */ 881 ip->rxr = dma_alloc_coherent(ip->dma_dev, RX_RING_SIZE, &ip->rxr_dma, 882 GFP_KERNEL); 883 if (!ip->rxr) { 884 pr_err("ioc3-eth: rx ring allocation failed\n"); 885 err = -ENOMEM; 886 goto out_stop; 887 } 888 889 /* Allocate tx rings. 16kb = 128 bufs, must be 16kb aligned */ 890 ip->tx_ring = dma_alloc_coherent(ip->dma_dev, TX_RING_SIZE + SZ_16K - 1, 891 &ip->txr_dma, GFP_KERNEL); 892 if (!ip->tx_ring) { 893 pr_err("ioc3-eth: tx ring allocation failed\n"); 894 err = -ENOMEM; 895 goto out_stop; 896 } 897 /* Align TX ring */ 898 ip->txr = PTR_ALIGN(ip->tx_ring, SZ_16K); 899 ip->txr_dma = ALIGN(ip->txr_dma, SZ_16K); 900 901 ioc3_init(dev); 902 903 ip->mii.phy_id_mask = 0x1f; 904 ip->mii.reg_num_mask = 0x1f; 905 ip->mii.dev = dev; 906 ip->mii.mdio_read = ioc3_mdio_read; 907 ip->mii.mdio_write = ioc3_mdio_write; 908 909 ioc3_mii_init(ip); 910 911 if (ip->mii.phy_id == -1) { 912 netdev_err(dev, "Didn't find a PHY, goodbye.\n"); 913 err = -ENODEV; 914 goto out_stop; 915 } 916 917 ioc3_mii_start(ip); 918 ioc3_ssram_disc(ip); 919 memcpy(dev->dev_addr, mac_addr, ETH_ALEN); 920 921 /* The IOC3-specific entries in the device structure. */ 922 dev->watchdog_timeo = 5 * HZ; 923 dev->netdev_ops = &ioc3_netdev_ops; 924 dev->ethtool_ops = &ioc3_ethtool_ops; 925 dev->hw_features = NETIF_F_IP_CSUM | NETIF_F_RXCSUM; 926 dev->features = NETIF_F_IP_CSUM | NETIF_F_HIGHDMA; 927 928 sw_physid1 = ioc3_mdio_read(dev, ip->mii.phy_id, MII_PHYSID1); 929 sw_physid2 = ioc3_mdio_read(dev, ip->mii.phy_id, MII_PHYSID2); 930 931 err = register_netdev(dev); 932 if (err) 933 goto out_stop; 934 935 mii_check_media(&ip->mii, 1, 1); 936 ioc3_setup_duplex(ip); 937 938 vendor = (sw_physid1 << 12) | (sw_physid2 >> 4); 939 model = (sw_physid2 >> 4) & 0x3f; 940 rev = sw_physid2 & 0xf; 941 netdev_info(dev, "Using PHY %d, vendor 0x%x, model %d, rev %d.\n", 942 ip->mii.phy_id, vendor, model, rev); 943 netdev_info(dev, "IOC3 SSRAM has %d kbyte.\n", 944 ip->emcr & EMCR_BUFSIZ ? 128 : 64); 945 946 return 0; 947 948out_stop: 949 del_timer_sync(&ip->ioc3_timer); 950 if (ip->rxr) 951 dma_free_coherent(ip->dma_dev, RX_RING_SIZE, ip->rxr, 952 ip->rxr_dma); 953 if (ip->tx_ring) 954 dma_free_coherent(ip->dma_dev, TX_RING_SIZE, ip->tx_ring, 955 ip->txr_dma); 956out_free: 957 free_netdev(dev); 958 return err; 959} 960 961static int ioc3eth_remove(struct platform_device *pdev) 962{ 963 struct net_device *dev = platform_get_drvdata(pdev); 964 struct ioc3_private *ip = netdev_priv(dev); 965 966 dma_free_coherent(ip->dma_dev, RX_RING_SIZE, ip->rxr, ip->rxr_dma); 967 dma_free_coherent(ip->dma_dev, TX_RING_SIZE, ip->tx_ring, ip->txr_dma); 968 969 unregister_netdev(dev); 970 del_timer_sync(&ip->ioc3_timer); 971 free_netdev(dev); 972 973 return 0; 974} 975 976 977static netdev_tx_t ioc3_start_xmit(struct sk_buff *skb, struct net_device *dev) 978{ 979 struct ioc3_private *ip = netdev_priv(dev); 980 struct ioc3_etxd *desc; 981 unsigned long data; 982 unsigned int len; 983 int produce; 984 u32 w0 = 0; 985 986 /* IOC3 has a fairly simple minded checksumming hardware which simply 987 * adds up the 1's complement checksum for the entire packet and 988 * inserts it at an offset which can be specified in the descriptor 989 * into the transmit packet. This means we have to compensate for the 990 * MAC header which should not be summed and the TCP/UDP pseudo headers 991 * manually. 992 */ 993 if (skb->ip_summed == CHECKSUM_PARTIAL) { 994 const struct iphdr *ih = ip_hdr(skb); 995 const int proto = ntohs(ih->protocol); 996 unsigned int csoff; 997 u32 csum, ehsum; 998 u16 *eh; 999 1000 /* The MAC header. skb->mac seem the logic approach 1001 * to find the MAC header - except it's a NULL pointer ... 1002 */ 1003 eh = (u16 *)skb->data; 1004 1005 /* Sum up dest addr, src addr and protocol */ 1006 ehsum = eh[0] + eh[1] + eh[2] + eh[3] + eh[4] + eh[5] + eh[6]; 1007 1008 /* Skip IP header; it's sum is always zero and was 1009 * already filled in by ip_output.c 1010 */ 1011 csum = csum_tcpudp_nofold(ih->saddr, ih->daddr, 1012 ih->tot_len - (ih->ihl << 2), 1013 proto, csum_fold(ehsum)); 1014 1015 csum = (csum & 0xffff) + (csum >> 16); /* Fold again */ 1016 csum = (csum & 0xffff) + (csum >> 16); 1017 1018 csoff = ETH_HLEN + (ih->ihl << 2); 1019 if (proto == IPPROTO_UDP) { 1020 csoff += offsetof(struct udphdr, check); 1021 udp_hdr(skb)->check = csum; 1022 } 1023 if (proto == IPPROTO_TCP) { 1024 csoff += offsetof(struct tcphdr, check); 1025 tcp_hdr(skb)->check = csum; 1026 } 1027 1028 w0 = ETXD_DOCHECKSUM | (csoff << ETXD_CHKOFF_SHIFT); 1029 } 1030 1031 spin_lock_irq(&ip->ioc3_lock); 1032 1033 data = (unsigned long)skb->data; 1034 len = skb->len; 1035 1036 produce = ip->tx_pi; 1037 desc = &ip->txr[produce]; 1038 1039 if (len <= 104) { 1040 /* Short packet, let's copy it directly into the ring. */ 1041 skb_copy_from_linear_data(skb, desc->data, skb->len); 1042 if (len < ETH_ZLEN) { 1043 /* Very short packet, pad with zeros at the end. */ 1044 memset(desc->data + len, 0, ETH_ZLEN - len); 1045 len = ETH_ZLEN; 1046 } 1047 desc->cmd = cpu_to_be32(len | ETXD_INTWHENDONE | ETXD_D0V | w0); 1048 desc->bufcnt = cpu_to_be32(len); 1049 } else if ((data ^ (data + len - 1)) & 0x4000) { 1050 unsigned long b2 = (data | 0x3fffUL) + 1UL; 1051 unsigned long s1 = b2 - data; 1052 unsigned long s2 = data + len - b2; 1053 dma_addr_t d1, d2; 1054 1055 desc->cmd = cpu_to_be32(len | ETXD_INTWHENDONE | 1056 ETXD_B1V | ETXD_B2V | w0); 1057 desc->bufcnt = cpu_to_be32((s1 << ETXD_B1CNT_SHIFT) | 1058 (s2 << ETXD_B2CNT_SHIFT)); 1059 d1 = dma_map_single(ip->dma_dev, skb->data, s1, DMA_TO_DEVICE); 1060 if (dma_mapping_error(ip->dma_dev, d1)) 1061 goto drop_packet; 1062 d2 = dma_map_single(ip->dma_dev, (void *)b2, s1, DMA_TO_DEVICE); 1063 if (dma_mapping_error(ip->dma_dev, d2)) { 1064 dma_unmap_single(ip->dma_dev, d1, len, DMA_TO_DEVICE); 1065 goto drop_packet; 1066 } 1067 desc->p1 = cpu_to_be64(ioc3_map(d1, PCI64_ATTR_PREF)); 1068 desc->p2 = cpu_to_be64(ioc3_map(d2, PCI64_ATTR_PREF)); 1069 } else { 1070 dma_addr_t d; 1071 1072 /* Normal sized packet that doesn't cross a page boundary. */ 1073 desc->cmd = cpu_to_be32(len | ETXD_INTWHENDONE | ETXD_B1V | w0); 1074 desc->bufcnt = cpu_to_be32(len << ETXD_B1CNT_SHIFT); 1075 d = dma_map_single(ip->dma_dev, skb->data, len, DMA_TO_DEVICE); 1076 if (dma_mapping_error(ip->dma_dev, d)) 1077 goto drop_packet; 1078 desc->p1 = cpu_to_be64(ioc3_map(d, PCI64_ATTR_PREF)); 1079 } 1080 1081 mb(); /* make sure all descriptor changes are visible */ 1082 1083 ip->tx_skbs[produce] = skb; /* Remember skb */ 1084 produce = (produce + 1) & TX_RING_MASK; 1085 ip->tx_pi = produce; 1086 writel(produce << 7, &ip->regs->etpir); /* Fire ... */ 1087 1088 ip->txqlen++; 1089 1090 if (ip->txqlen >= (TX_RING_ENTRIES - 1)) 1091 netif_stop_queue(dev); 1092 1093 spin_unlock_irq(&ip->ioc3_lock); 1094 1095 return NETDEV_TX_OK; 1096 1097drop_packet: 1098 dev_kfree_skb_any(skb); 1099 dev->stats.tx_dropped++; 1100 1101 spin_unlock_irq(&ip->ioc3_lock); 1102 1103 return NETDEV_TX_OK; 1104} 1105 1106static void ioc3_timeout(struct net_device *dev, unsigned int txqueue) 1107{ 1108 struct ioc3_private *ip = netdev_priv(dev); 1109 1110 netdev_err(dev, "transmit timed out, resetting\n"); 1111 1112 spin_lock_irq(&ip->ioc3_lock); 1113 1114 ioc3_stop(ip); 1115 ioc3_free_rx_bufs(ip); 1116 ioc3_clean_tx_ring(ip); 1117 1118 ioc3_init(dev); 1119 if (ioc3_alloc_rx_bufs(dev)) { 1120 netdev_err(dev, "%s: rx buffer allocation failed\n", __func__); 1121 spin_unlock_irq(&ip->ioc3_lock); 1122 return; 1123 } 1124 ioc3_start(ip); 1125 ioc3_mii_init(ip); 1126 ioc3_mii_start(ip); 1127 1128 spin_unlock_irq(&ip->ioc3_lock); 1129 1130 netif_wake_queue(dev); 1131} 1132 1133/* Given a multicast ethernet address, this routine calculates the 1134 * address's bit index in the logical address filter mask 1135 */ 1136static inline unsigned int ioc3_hash(const unsigned char *addr) 1137{ 1138 unsigned int temp = 0; 1139 int bits; 1140 u32 crc; 1141 1142 crc = ether_crc_le(ETH_ALEN, addr); 1143 1144 crc &= 0x3f; /* bit reverse lowest 6 bits for hash index */ 1145 for (bits = 6; --bits >= 0; ) { 1146 temp <<= 1; 1147 temp |= (crc & 0x1); 1148 crc >>= 1; 1149 } 1150 1151 return temp; 1152} 1153 1154static void ioc3_get_drvinfo(struct net_device *dev, 1155 struct ethtool_drvinfo *info) 1156{ 1157 strlcpy(info->driver, IOC3_NAME, sizeof(info->driver)); 1158 strlcpy(info->version, IOC3_VERSION, sizeof(info->version)); 1159 strlcpy(info->bus_info, pci_name(to_pci_dev(dev->dev.parent)), 1160 sizeof(info->bus_info)); 1161} 1162 1163static int ioc3_get_link_ksettings(struct net_device *dev, 1164 struct ethtool_link_ksettings *cmd) 1165{ 1166 struct ioc3_private *ip = netdev_priv(dev); 1167 1168 spin_lock_irq(&ip->ioc3_lock); 1169 mii_ethtool_get_link_ksettings(&ip->mii, cmd); 1170 spin_unlock_irq(&ip->ioc3_lock); 1171 1172 return 0; 1173} 1174 1175static int ioc3_set_link_ksettings(struct net_device *dev, 1176 const struct ethtool_link_ksettings *cmd) 1177{ 1178 struct ioc3_private *ip = netdev_priv(dev); 1179 int rc; 1180 1181 spin_lock_irq(&ip->ioc3_lock); 1182 rc = mii_ethtool_set_link_ksettings(&ip->mii, cmd); 1183 spin_unlock_irq(&ip->ioc3_lock); 1184 1185 return rc; 1186} 1187 1188static int ioc3_nway_reset(struct net_device *dev) 1189{ 1190 struct ioc3_private *ip = netdev_priv(dev); 1191 int rc; 1192 1193 spin_lock_irq(&ip->ioc3_lock); 1194 rc = mii_nway_restart(&ip->mii); 1195 spin_unlock_irq(&ip->ioc3_lock); 1196 1197 return rc; 1198} 1199 1200static u32 ioc3_get_link(struct net_device *dev) 1201{ 1202 struct ioc3_private *ip = netdev_priv(dev); 1203 int rc; 1204 1205 spin_lock_irq(&ip->ioc3_lock); 1206 rc = mii_link_ok(&ip->mii); 1207 spin_unlock_irq(&ip->ioc3_lock); 1208 1209 return rc; 1210} 1211 1212static const struct ethtool_ops ioc3_ethtool_ops = { 1213 .get_drvinfo = ioc3_get_drvinfo, 1214 .nway_reset = ioc3_nway_reset, 1215 .get_link = ioc3_get_link, 1216 .get_link_ksettings = ioc3_get_link_ksettings, 1217 .set_link_ksettings = ioc3_set_link_ksettings, 1218}; 1219 1220static int ioc3_ioctl(struct net_device *dev, struct ifreq *rq, int cmd) 1221{ 1222 struct ioc3_private *ip = netdev_priv(dev); 1223 int rc; 1224 1225 spin_lock_irq(&ip->ioc3_lock); 1226 rc = generic_mii_ioctl(&ip->mii, if_mii(rq), cmd, NULL); 1227 spin_unlock_irq(&ip->ioc3_lock); 1228 1229 return rc; 1230} 1231 1232static void ioc3_set_multicast_list(struct net_device *dev) 1233{ 1234 struct ioc3_private *ip = netdev_priv(dev); 1235 struct ioc3_ethregs *regs = ip->regs; 1236 struct netdev_hw_addr *ha; 1237 u64 ehar = 0; 1238 1239 spin_lock_irq(&ip->ioc3_lock); 1240 1241 if (dev->flags & IFF_PROMISC) { /* Set promiscuous. */ 1242 ip->emcr |= EMCR_PROMISC; 1243 writel(ip->emcr, ®s->emcr); 1244 readl(®s->emcr); 1245 } else { 1246 ip->emcr &= ~EMCR_PROMISC; 1247 writel(ip->emcr, ®s->emcr); /* Clear promiscuous. */ 1248 readl(®s->emcr); 1249 1250 if ((dev->flags & IFF_ALLMULTI) || 1251 (netdev_mc_count(dev) > 64)) { 1252 /* Too many for hashing to make sense or we want all 1253 * multicast packets anyway, so skip computing all the 1254 * hashes and just accept all packets. 1255 */ 1256 ip->ehar_h = 0xffffffff; 1257 ip->ehar_l = 0xffffffff; 1258 } else { 1259 netdev_for_each_mc_addr(ha, dev) { 1260 ehar |= (1UL << ioc3_hash(ha->addr)); 1261 } 1262 ip->ehar_h = ehar >> 32; 1263 ip->ehar_l = ehar & 0xffffffff; 1264 } 1265 writel(ip->ehar_h, ®s->ehar_h); 1266 writel(ip->ehar_l, ®s->ehar_l); 1267 } 1268 1269 spin_unlock_irq(&ip->ioc3_lock); 1270} 1271 1272static struct platform_driver ioc3eth_driver = { 1273 .probe = ioc3eth_probe, 1274 .remove = ioc3eth_remove, 1275 .driver = { 1276 .name = "ioc3-eth", 1277 } 1278}; 1279 1280module_platform_driver(ioc3eth_driver); 1281 1282MODULE_AUTHOR("Ralf Baechle <ralf@linux-mips.org>"); 1283MODULE_DESCRIPTION("SGI IOC3 Ethernet driver"); 1284MODULE_LICENSE("GPL");