1 /* 2 * Copyright (C) 2006-2007 PA Semi, Inc 3 * 4 * Driver for the PA Semi PWRficient onchip 1G/10G Ethernet MACs 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License version 2 as 8 * published by the Free Software Foundation. 9 * 10 * This program is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 * GNU General Public License for more details. 14 * 15 * You should have received a copy of the GNU General Public License 16 * along with this program; if not, write to the Free Software 17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 18 */ 19 20 #include <linux/init.h> 21 #include <linux/module.h> 22 #include <linux/pci.h> 23 #include <linux/slab.h> 24 #include <linux/interrupt.h> 25 #include <linux/dmaengine.h> 26 #include <linux/delay.h> 27 #include <linux/netdevice.h> 28 #include <linux/of_mdio.h> 29 #include <linux/etherdevice.h> 30 #include <asm/dma-mapping.h> 31 #include <linux/in.h> 32 #include <linux/skbuff.h> 33 34 #include <linux/ip.h> 35 #include <linux/tcp.h> 36 #include <net/checksum.h> 37 #include <linux/inet_lro.h> 38 #include <linux/prefetch.h> 39 40 #include <asm/irq.h> 41 #include <asm/firmware.h> 42 #include <asm/pasemi_dma.h> 43 44 #include "pasemi_mac.h" 45 46 /* We have our own align, since ppc64 in general has it at 0 because 47 * of design flaws in some of the server bridge chips. However, for 48 * PWRficient doing the unaligned copies is more expensive than doing 49 * unaligned DMA, so make sure the data is aligned instead. 50 */ 51 #define LOCAL_SKB_ALIGN 2 52 53 /* TODO list 54 * 55 * - Multicast support 56 * - Large MTU support 57 * - SW LRO 58 * - Multiqueue RX/TX 59 */ 60 61 #define LRO_MAX_AGGR 64 62 63 #define PE_MIN_MTU 64 64 #define PE_MAX_MTU 9000 65 #define PE_DEF_MTU ETH_DATA_LEN 66 67 #define DEFAULT_MSG_ENABLE \ 68 (NETIF_MSG_DRV | \ 69 NETIF_MSG_PROBE | \ 70 NETIF_MSG_LINK | \ 71 NETIF_MSG_TIMER | \ 72 NETIF_MSG_IFDOWN | \ 73 NETIF_MSG_IFUP | \ 74 NETIF_MSG_RX_ERR | \ 75 NETIF_MSG_TX_ERR) 76 77 MODULE_LICENSE("GPL"); 78 MODULE_AUTHOR ("Olof Johansson <olof@lixom.net>"); 79 MODULE_DESCRIPTION("PA Semi PWRficient Ethernet driver"); 80 81 static int debug = -1; /* -1 == use DEFAULT_MSG_ENABLE as value */ 82 module_param(debug, int, 0); 83 MODULE_PARM_DESC(debug, "PA Semi MAC bitmapped debugging message enable value"); 84 85 extern const struct ethtool_ops pasemi_mac_ethtool_ops; 86 87 static int translation_enabled(void) 88 { 89 #if defined(CONFIG_PPC_PASEMI_IOMMU_DMA_FORCE) 90 return 1; 91 #else 92 return firmware_has_feature(FW_FEATURE_LPAR); 93 #endif 94 } 95 96 static void write_iob_reg(unsigned int reg, unsigned int val) 97 { 98 pasemi_write_iob_reg(reg, val); 99 } 100 101 static unsigned int read_mac_reg(const struct pasemi_mac *mac, unsigned int reg) 102 { 103 return pasemi_read_mac_reg(mac->dma_if, reg); 104 } 105 106 static void write_mac_reg(const struct pasemi_mac *mac, unsigned int reg, 107 unsigned int val) 108 { 109 pasemi_write_mac_reg(mac->dma_if, reg, val); 110 } 111 112 static unsigned int read_dma_reg(unsigned int reg) 113 { 114 return pasemi_read_dma_reg(reg); 115 } 116 117 static void write_dma_reg(unsigned int reg, unsigned int val) 118 { 119 pasemi_write_dma_reg(reg, val); 120 } 121 122 static struct pasemi_mac_rxring *rx_ring(const struct pasemi_mac *mac) 123 { 124 return mac->rx; 125 } 126 127 static struct pasemi_mac_txring *tx_ring(const struct pasemi_mac *mac) 128 { 129 return mac->tx; 130 } 131 132 static inline void prefetch_skb(const struct sk_buff *skb) 133 { 134 const void *d = skb; 135 136 prefetch(d); 137 prefetch(d+64); 138 prefetch(d+128); 139 prefetch(d+192); 140 } 141 142 static int mac_to_intf(struct pasemi_mac *mac) 143 { 144 struct pci_dev *pdev = mac->pdev; 145 u32 tmp; 146 int nintf, off, i, j; 147 int devfn = pdev->devfn; 148 149 tmp = read_dma_reg(PAS_DMA_CAP_IFI); 150 nintf = (tmp & PAS_DMA_CAP_IFI_NIN_M) >> PAS_DMA_CAP_IFI_NIN_S; 151 off = (tmp & PAS_DMA_CAP_IFI_IOFF_M) >> PAS_DMA_CAP_IFI_IOFF_S; 152 153 /* IOFF contains the offset to the registers containing the 154 * DMA interface-to-MAC-pci-id mappings, and NIN contains number 155 * of total interfaces. Each register contains 4 devfns. 156 * Just do a linear search until we find the devfn of the MAC 157 * we're trying to look up. 158 */ 159 160 for (i = 0; i < (nintf+3)/4; i++) { 161 tmp = read_dma_reg(off+4*i); 162 for (j = 0; j < 4; j++) { 163 if (((tmp >> (8*j)) & 0xff) == devfn) 164 return i*4 + j; 165 } 166 } 167 return -1; 168 } 169 170 static void pasemi_mac_intf_disable(struct pasemi_mac *mac) 171 { 172 unsigned int flags; 173 174 flags = read_mac_reg(mac, PAS_MAC_CFG_PCFG); 175 flags &= ~PAS_MAC_CFG_PCFG_PE; 176 write_mac_reg(mac, PAS_MAC_CFG_PCFG, flags); 177 } 178 179 static void pasemi_mac_intf_enable(struct pasemi_mac *mac) 180 { 181 unsigned int flags; 182 183 flags = read_mac_reg(mac, PAS_MAC_CFG_PCFG); 184 flags |= PAS_MAC_CFG_PCFG_PE; 185 write_mac_reg(mac, PAS_MAC_CFG_PCFG, flags); 186 } 187 188 static int pasemi_get_mac_addr(struct pasemi_mac *mac) 189 { 190 struct pci_dev *pdev = mac->pdev; 191 struct device_node *dn = pci_device_to_OF_node(pdev); 192 int len; 193 const u8 *maddr; 194 u8 addr[6]; 195 196 if (!dn) { 197 dev_dbg(&pdev->dev, 198 "No device node for mac, not configuring\n"); 199 return -ENOENT; 200 } 201 202 maddr = of_get_property(dn, "local-mac-address", &len); 203 204 if (maddr && len == 6) { 205 memcpy(mac->mac_addr, maddr, 6); 206 return 0; 207 } 208 209 /* Some old versions of firmware mistakenly uses mac-address 210 * (and as a string) instead of a byte array in local-mac-address. 211 */ 212 213 if (maddr == NULL) 214 maddr = of_get_property(dn, "mac-address", NULL); 215 216 if (maddr == NULL) { 217 dev_warn(&pdev->dev, 218 "no mac address in device tree, not configuring\n"); 219 return -ENOENT; 220 } 221 222 if (sscanf(maddr, "%hhx:%hhx:%hhx:%hhx:%hhx:%hhx", &addr[0], 223 &addr[1], &addr[2], &addr[3], &addr[4], &addr[5]) != 6) { 224 dev_warn(&pdev->dev, 225 "can't parse mac address, not configuring\n"); 226 return -EINVAL; 227 } 228 229 memcpy(mac->mac_addr, addr, 6); 230 231 return 0; 232 } 233 234 static int pasemi_mac_set_mac_addr(struct net_device *dev, void *p) 235 { 236 struct pasemi_mac *mac = netdev_priv(dev); 237 struct sockaddr *addr = p; 238 unsigned int adr0, adr1; 239 240 if (!is_valid_ether_addr(addr->sa_data)) 241 return -EADDRNOTAVAIL; 242 243 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len); 244 245 adr0 = dev->dev_addr[2] << 24 | 246 dev->dev_addr[3] << 16 | 247 dev->dev_addr[4] << 8 | 248 dev->dev_addr[5]; 249 adr1 = read_mac_reg(mac, PAS_MAC_CFG_ADR1); 250 adr1 &= ~0xffff; 251 adr1 |= dev->dev_addr[0] << 8 | dev->dev_addr[1]; 252 253 pasemi_mac_intf_disable(mac); 254 write_mac_reg(mac, PAS_MAC_CFG_ADR0, adr0); 255 write_mac_reg(mac, PAS_MAC_CFG_ADR1, adr1); 256 pasemi_mac_intf_enable(mac); 257 258 return 0; 259 } 260 261 static int get_skb_hdr(struct sk_buff *skb, void **iphdr, 262 void **tcph, u64 *hdr_flags, void *data) 263 { 264 u64 macrx = (u64) data; 265 unsigned int ip_len; 266 struct iphdr *iph; 267 268 /* IPv4 header checksum failed */ 269 if ((macrx & XCT_MACRX_HTY_M) != XCT_MACRX_HTY_IPV4_OK) 270 return -1; 271 272 /* non tcp packet */ 273 skb_reset_network_header(skb); 274 iph = ip_hdr(skb); 275 if (iph->protocol != IPPROTO_TCP) 276 return -1; 277 278 ip_len = ip_hdrlen(skb); 279 skb_set_transport_header(skb, ip_len); 280 *tcph = tcp_hdr(skb); 281 282 /* check if ip header and tcp header are complete */ 283 if (ntohs(iph->tot_len) < ip_len + tcp_hdrlen(skb)) 284 return -1; 285 286 *hdr_flags = LRO_IPV4 | LRO_TCP; 287 *iphdr = iph; 288 289 return 0; 290 } 291 292 static int pasemi_mac_unmap_tx_skb(struct pasemi_mac *mac, 293 const int nfrags, 294 struct sk_buff *skb, 295 const dma_addr_t *dmas) 296 { 297 int f; 298 struct pci_dev *pdev = mac->dma_pdev; 299 300 pci_unmap_single(pdev, dmas[0], skb_headlen(skb), PCI_DMA_TODEVICE); 301 302 for (f = 0; f < nfrags; f++) { 303 const skb_frag_t *frag = &skb_shinfo(skb)->frags[f]; 304 305 pci_unmap_page(pdev, dmas[f+1], skb_frag_size(frag), PCI_DMA_TODEVICE); 306 } 307 dev_kfree_skb_irq(skb); 308 309 /* Freed descriptor slot + main SKB ptr + nfrags additional ptrs, 310 * aligned up to a power of 2 311 */ 312 return (nfrags + 3) & ~1; 313 } 314 315 static struct pasemi_mac_csring *pasemi_mac_setup_csring(struct pasemi_mac *mac) 316 { 317 struct pasemi_mac_csring *ring; 318 u32 val; 319 unsigned int cfg; 320 int chno; 321 322 ring = pasemi_dma_alloc_chan(TXCHAN, sizeof(struct pasemi_mac_csring), 323 offsetof(struct pasemi_mac_csring, chan)); 324 325 if (!ring) { 326 dev_err(&mac->pdev->dev, "Can't allocate checksum channel\n"); 327 goto out_chan; 328 } 329 330 chno = ring->chan.chno; 331 332 ring->size = CS_RING_SIZE; 333 ring->next_to_fill = 0; 334 335 /* Allocate descriptors */ 336 if (pasemi_dma_alloc_ring(&ring->chan, CS_RING_SIZE)) 337 goto out_ring_desc; 338 339 write_dma_reg(PAS_DMA_TXCHAN_BASEL(chno), 340 PAS_DMA_TXCHAN_BASEL_BRBL(ring->chan.ring_dma)); 341 val = PAS_DMA_TXCHAN_BASEU_BRBH(ring->chan.ring_dma >> 32); 342 val |= PAS_DMA_TXCHAN_BASEU_SIZ(CS_RING_SIZE >> 3); 343 344 write_dma_reg(PAS_DMA_TXCHAN_BASEU(chno), val); 345 346 ring->events[0] = pasemi_dma_alloc_flag(); 347 ring->events[1] = pasemi_dma_alloc_flag(); 348 if (ring->events[0] < 0 || ring->events[1] < 0) 349 goto out_flags; 350 351 pasemi_dma_clear_flag(ring->events[0]); 352 pasemi_dma_clear_flag(ring->events[1]); 353 354 ring->fun = pasemi_dma_alloc_fun(); 355 if (ring->fun < 0) 356 goto out_fun; 357 358 cfg = PAS_DMA_TXCHAN_CFG_TY_FUNC | PAS_DMA_TXCHAN_CFG_UP | 359 PAS_DMA_TXCHAN_CFG_TATTR(ring->fun) | 360 PAS_DMA_TXCHAN_CFG_LPSQ | PAS_DMA_TXCHAN_CFG_LPDQ; 361 362 if (translation_enabled()) 363 cfg |= PAS_DMA_TXCHAN_CFG_TRD | PAS_DMA_TXCHAN_CFG_TRR; 364 365 write_dma_reg(PAS_DMA_TXCHAN_CFG(chno), cfg); 366 367 /* enable channel */ 368 pasemi_dma_start_chan(&ring->chan, PAS_DMA_TXCHAN_TCMDSTA_SZ | 369 PAS_DMA_TXCHAN_TCMDSTA_DB | 370 PAS_DMA_TXCHAN_TCMDSTA_DE | 371 PAS_DMA_TXCHAN_TCMDSTA_DA); 372 373 return ring; 374 375 out_fun: 376 out_flags: 377 if (ring->events[0] >= 0) 378 pasemi_dma_free_flag(ring->events[0]); 379 if (ring->events[1] >= 0) 380 pasemi_dma_free_flag(ring->events[1]); 381 pasemi_dma_free_ring(&ring->chan); 382 out_ring_desc: 383 pasemi_dma_free_chan(&ring->chan); 384 out_chan: 385 386 return NULL; 387 } 388 389 static void pasemi_mac_setup_csrings(struct pasemi_mac *mac) 390 { 391 int i; 392 mac->cs[0] = pasemi_mac_setup_csring(mac); 393 if (mac->type == MAC_TYPE_XAUI) 394 mac->cs[1] = pasemi_mac_setup_csring(mac); 395 else 396 mac->cs[1] = 0; 397 398 for (i = 0; i < MAX_CS; i++) 399 if (mac->cs[i]) 400 mac->num_cs++; 401 } 402 403 static void pasemi_mac_free_csring(struct pasemi_mac_csring *csring) 404 { 405 pasemi_dma_stop_chan(&csring->chan); 406 pasemi_dma_free_flag(csring->events[0]); 407 pasemi_dma_free_flag(csring->events[1]); 408 pasemi_dma_free_ring(&csring->chan); 409 pasemi_dma_free_chan(&csring->chan); 410 pasemi_dma_free_fun(csring->fun); 411 } 412 413 static int pasemi_mac_setup_rx_resources(const struct net_device *dev) 414 { 415 struct pasemi_mac_rxring *ring; 416 struct pasemi_mac *mac = netdev_priv(dev); 417 int chno; 418 unsigned int cfg; 419 420 ring = pasemi_dma_alloc_chan(RXCHAN, sizeof(struct pasemi_mac_rxring), 421 offsetof(struct pasemi_mac_rxring, chan)); 422 423 if (!ring) { 424 dev_err(&mac->pdev->dev, "Can't allocate RX channel\n"); 425 goto out_chan; 426 } 427 chno = ring->chan.chno; 428 429 spin_lock_init(&ring->lock); 430 431 ring->size = RX_RING_SIZE; 432 ring->ring_info = kzalloc(sizeof(struct pasemi_mac_buffer) * 433 RX_RING_SIZE, GFP_KERNEL); 434 435 if (!ring->ring_info) 436 goto out_ring_info; 437 438 /* Allocate descriptors */ 439 if (pasemi_dma_alloc_ring(&ring->chan, RX_RING_SIZE)) 440 goto out_ring_desc; 441 442 ring->buffers = dma_alloc_coherent(&mac->dma_pdev->dev, 443 RX_RING_SIZE * sizeof(u64), 444 &ring->buf_dma, GFP_KERNEL); 445 if (!ring->buffers) 446 goto out_ring_desc; 447 448 memset(ring->buffers, 0, RX_RING_SIZE * sizeof(u64)); 449 450 write_dma_reg(PAS_DMA_RXCHAN_BASEL(chno), 451 PAS_DMA_RXCHAN_BASEL_BRBL(ring->chan.ring_dma)); 452 453 write_dma_reg(PAS_DMA_RXCHAN_BASEU(chno), 454 PAS_DMA_RXCHAN_BASEU_BRBH(ring->chan.ring_dma >> 32) | 455 PAS_DMA_RXCHAN_BASEU_SIZ(RX_RING_SIZE >> 3)); 456 457 cfg = PAS_DMA_RXCHAN_CFG_HBU(2); 458 459 if (translation_enabled()) 460 cfg |= PAS_DMA_RXCHAN_CFG_CTR; 461 462 write_dma_reg(PAS_DMA_RXCHAN_CFG(chno), cfg); 463 464 write_dma_reg(PAS_DMA_RXINT_BASEL(mac->dma_if), 465 PAS_DMA_RXINT_BASEL_BRBL(ring->buf_dma)); 466 467 write_dma_reg(PAS_DMA_RXINT_BASEU(mac->dma_if), 468 PAS_DMA_RXINT_BASEU_BRBH(ring->buf_dma >> 32) | 469 PAS_DMA_RXINT_BASEU_SIZ(RX_RING_SIZE >> 3)); 470 471 cfg = PAS_DMA_RXINT_CFG_DHL(2) | PAS_DMA_RXINT_CFG_L2 | 472 PAS_DMA_RXINT_CFG_LW | PAS_DMA_RXINT_CFG_RBP | 473 PAS_DMA_RXINT_CFG_HEN; 474 475 if (translation_enabled()) 476 cfg |= PAS_DMA_RXINT_CFG_ITRR | PAS_DMA_RXINT_CFG_ITR; 477 478 write_dma_reg(PAS_DMA_RXINT_CFG(mac->dma_if), cfg); 479 480 ring->next_to_fill = 0; 481 ring->next_to_clean = 0; 482 ring->mac = mac; 483 mac->rx = ring; 484 485 return 0; 486 487 out_ring_desc: 488 kfree(ring->ring_info); 489 out_ring_info: 490 pasemi_dma_free_chan(&ring->chan); 491 out_chan: 492 return -ENOMEM; 493 } 494 495 static struct pasemi_mac_txring * 496 pasemi_mac_setup_tx_resources(const struct net_device *dev) 497 { 498 struct pasemi_mac *mac = netdev_priv(dev); 499 u32 val; 500 struct pasemi_mac_txring *ring; 501 unsigned int cfg; 502 int chno; 503 504 ring = pasemi_dma_alloc_chan(TXCHAN, sizeof(struct pasemi_mac_txring), 505 offsetof(struct pasemi_mac_txring, chan)); 506 507 if (!ring) { 508 dev_err(&mac->pdev->dev, "Can't allocate TX channel\n"); 509 goto out_chan; 510 } 511 512 chno = ring->chan.chno; 513 514 spin_lock_init(&ring->lock); 515 516 ring->size = TX_RING_SIZE; 517 ring->ring_info = kzalloc(sizeof(struct pasemi_mac_buffer) * 518 TX_RING_SIZE, GFP_KERNEL); 519 if (!ring->ring_info) 520 goto out_ring_info; 521 522 /* Allocate descriptors */ 523 if (pasemi_dma_alloc_ring(&ring->chan, TX_RING_SIZE)) 524 goto out_ring_desc; 525 526 write_dma_reg(PAS_DMA_TXCHAN_BASEL(chno), 527 PAS_DMA_TXCHAN_BASEL_BRBL(ring->chan.ring_dma)); 528 val = PAS_DMA_TXCHAN_BASEU_BRBH(ring->chan.ring_dma >> 32); 529 val |= PAS_DMA_TXCHAN_BASEU_SIZ(TX_RING_SIZE >> 3); 530 531 write_dma_reg(PAS_DMA_TXCHAN_BASEU(chno), val); 532 533 cfg = PAS_DMA_TXCHAN_CFG_TY_IFACE | 534 PAS_DMA_TXCHAN_CFG_TATTR(mac->dma_if) | 535 PAS_DMA_TXCHAN_CFG_UP | 536 PAS_DMA_TXCHAN_CFG_WT(4); 537 538 if (translation_enabled()) 539 cfg |= PAS_DMA_TXCHAN_CFG_TRD | PAS_DMA_TXCHAN_CFG_TRR; 540 541 write_dma_reg(PAS_DMA_TXCHAN_CFG(chno), cfg); 542 543 ring->next_to_fill = 0; 544 ring->next_to_clean = 0; 545 ring->mac = mac; 546 547 return ring; 548 549 out_ring_desc: 550 kfree(ring->ring_info); 551 out_ring_info: 552 pasemi_dma_free_chan(&ring->chan); 553 out_chan: 554 return NULL; 555 } 556 557 static void pasemi_mac_free_tx_resources(struct pasemi_mac *mac) 558 { 559 struct pasemi_mac_txring *txring = tx_ring(mac); 560 unsigned int i, j; 561 struct pasemi_mac_buffer *info; 562 dma_addr_t dmas[MAX_SKB_FRAGS+1]; 563 int freed, nfrags; 564 int start, limit; 565 566 start = txring->next_to_clean; 567 limit = txring->next_to_fill; 568 569 /* Compensate for when fill has wrapped and clean has not */ 570 if (start > limit) 571 limit += TX_RING_SIZE; 572 573 for (i = start; i < limit; i += freed) { 574 info = &txring->ring_info[(i+1) & (TX_RING_SIZE-1)]; 575 if (info->dma && info->skb) { 576 nfrags = skb_shinfo(info->skb)->nr_frags; 577 for (j = 0; j <= nfrags; j++) 578 dmas[j] = txring->ring_info[(i+1+j) & 579 (TX_RING_SIZE-1)].dma; 580 freed = pasemi_mac_unmap_tx_skb(mac, nfrags, 581 info->skb, dmas); 582 } else 583 freed = 2; 584 } 585 586 kfree(txring->ring_info); 587 pasemi_dma_free_chan(&txring->chan); 588 589 } 590 591 static void pasemi_mac_free_rx_buffers(struct pasemi_mac *mac) 592 { 593 struct pasemi_mac_rxring *rx = rx_ring(mac); 594 unsigned int i; 595 struct pasemi_mac_buffer *info; 596 597 for (i = 0; i < RX_RING_SIZE; i++) { 598 info = &RX_DESC_INFO(rx, i); 599 if (info->skb && info->dma) { 600 pci_unmap_single(mac->dma_pdev, 601 info->dma, 602 info->skb->len, 603 PCI_DMA_FROMDEVICE); 604 dev_kfree_skb_any(info->skb); 605 } 606 info->dma = 0; 607 info->skb = NULL; 608 } 609 610 for (i = 0; i < RX_RING_SIZE; i++) 611 RX_BUFF(rx, i) = 0; 612 } 613 614 static void pasemi_mac_free_rx_resources(struct pasemi_mac *mac) 615 { 616 pasemi_mac_free_rx_buffers(mac); 617 618 dma_free_coherent(&mac->dma_pdev->dev, RX_RING_SIZE * sizeof(u64), 619 rx_ring(mac)->buffers, rx_ring(mac)->buf_dma); 620 621 kfree(rx_ring(mac)->ring_info); 622 pasemi_dma_free_chan(&rx_ring(mac)->chan); 623 mac->rx = NULL; 624 } 625 626 static void pasemi_mac_replenish_rx_ring(struct net_device *dev, 627 const int limit) 628 { 629 const struct pasemi_mac *mac = netdev_priv(dev); 630 struct pasemi_mac_rxring *rx = rx_ring(mac); 631 int fill, count; 632 633 if (limit <= 0) 634 return; 635 636 fill = rx_ring(mac)->next_to_fill; 637 for (count = 0; count < limit; count++) { 638 struct pasemi_mac_buffer *info = &RX_DESC_INFO(rx, fill); 639 u64 *buff = &RX_BUFF(rx, fill); 640 struct sk_buff *skb; 641 dma_addr_t dma; 642 643 /* Entry in use? */ 644 WARN_ON(*buff); 645 646 skb = netdev_alloc_skb(dev, mac->bufsz); 647 skb_reserve(skb, LOCAL_SKB_ALIGN); 648 649 if (unlikely(!skb)) 650 break; 651 652 dma = pci_map_single(mac->dma_pdev, skb->data, 653 mac->bufsz - LOCAL_SKB_ALIGN, 654 PCI_DMA_FROMDEVICE); 655 656 if (unlikely(pci_dma_mapping_error(mac->dma_pdev, dma))) { 657 dev_kfree_skb_irq(info->skb); 658 break; 659 } 660 661 info->skb = skb; 662 info->dma = dma; 663 *buff = XCT_RXB_LEN(mac->bufsz) | XCT_RXB_ADDR(dma); 664 fill++; 665 } 666 667 wmb(); 668 669 write_dma_reg(PAS_DMA_RXINT_INCR(mac->dma_if), count); 670 671 rx_ring(mac)->next_to_fill = (rx_ring(mac)->next_to_fill + count) & 672 (RX_RING_SIZE - 1); 673 } 674 675 static void pasemi_mac_restart_rx_intr(const struct pasemi_mac *mac) 676 { 677 struct pasemi_mac_rxring *rx = rx_ring(mac); 678 unsigned int reg, pcnt; 679 /* Re-enable packet count interrupts: finally 680 * ack the packet count interrupt we got in rx_intr. 681 */ 682 683 pcnt = *rx->chan.status & PAS_STATUS_PCNT_M; 684 685 reg = PAS_IOB_DMA_RXCH_RESET_PCNT(pcnt) | PAS_IOB_DMA_RXCH_RESET_PINTC; 686 687 if (*rx->chan.status & PAS_STATUS_TIMER) 688 reg |= PAS_IOB_DMA_RXCH_RESET_TINTC; 689 690 write_iob_reg(PAS_IOB_DMA_RXCH_RESET(mac->rx->chan.chno), reg); 691 } 692 693 static void pasemi_mac_restart_tx_intr(const struct pasemi_mac *mac) 694 { 695 unsigned int reg, pcnt; 696 697 /* Re-enable packet count interrupts */ 698 pcnt = *tx_ring(mac)->chan.status & PAS_STATUS_PCNT_M; 699 700 reg = PAS_IOB_DMA_TXCH_RESET_PCNT(pcnt) | PAS_IOB_DMA_TXCH_RESET_PINTC; 701 702 write_iob_reg(PAS_IOB_DMA_TXCH_RESET(tx_ring(mac)->chan.chno), reg); 703 } 704 705 706 static inline void pasemi_mac_rx_error(const struct pasemi_mac *mac, 707 const u64 macrx) 708 { 709 unsigned int rcmdsta, ccmdsta; 710 struct pasemi_dmachan *chan = &rx_ring(mac)->chan; 711 712 if (!netif_msg_rx_err(mac)) 713 return; 714 715 rcmdsta = read_dma_reg(PAS_DMA_RXINT_RCMDSTA(mac->dma_if)); 716 ccmdsta = read_dma_reg(PAS_DMA_RXCHAN_CCMDSTA(chan->chno)); 717 718 printk(KERN_ERR "pasemi_mac: rx error. macrx %016llx, rx status %llx\n", 719 macrx, *chan->status); 720 721 printk(KERN_ERR "pasemi_mac: rcmdsta %08x ccmdsta %08x\n", 722 rcmdsta, ccmdsta); 723 } 724 725 static inline void pasemi_mac_tx_error(const struct pasemi_mac *mac, 726 const u64 mactx) 727 { 728 unsigned int cmdsta; 729 struct pasemi_dmachan *chan = &tx_ring(mac)->chan; 730 731 if (!netif_msg_tx_err(mac)) 732 return; 733 734 cmdsta = read_dma_reg(PAS_DMA_TXCHAN_TCMDSTA(chan->chno)); 735 736 printk(KERN_ERR "pasemi_mac: tx error. mactx 0x%016llx, "\ 737 "tx status 0x%016llx\n", mactx, *chan->status); 738 739 printk(KERN_ERR "pasemi_mac: tcmdsta 0x%08x\n", cmdsta); 740 } 741 742 static int pasemi_mac_clean_rx(struct pasemi_mac_rxring *rx, 743 const int limit) 744 { 745 const struct pasemi_dmachan *chan = &rx->chan; 746 struct pasemi_mac *mac = rx->mac; 747 struct pci_dev *pdev = mac->dma_pdev; 748 unsigned int n; 749 int count, buf_index, tot_bytes, packets; 750 struct pasemi_mac_buffer *info; 751 struct sk_buff *skb; 752 unsigned int len; 753 u64 macrx, eval; 754 dma_addr_t dma; 755 756 tot_bytes = 0; 757 packets = 0; 758 759 spin_lock(&rx->lock); 760 761 n = rx->next_to_clean; 762 763 prefetch(&RX_DESC(rx, n)); 764 765 for (count = 0; count < limit; count++) { 766 macrx = RX_DESC(rx, n); 767 prefetch(&RX_DESC(rx, n+4)); 768 769 if ((macrx & XCT_MACRX_E) || 770 (*chan->status & PAS_STATUS_ERROR)) 771 pasemi_mac_rx_error(mac, macrx); 772 773 if (!(macrx & XCT_MACRX_O)) 774 break; 775 776 info = NULL; 777 778 BUG_ON(!(macrx & XCT_MACRX_RR_8BRES)); 779 780 eval = (RX_DESC(rx, n+1) & XCT_RXRES_8B_EVAL_M) >> 781 XCT_RXRES_8B_EVAL_S; 782 buf_index = eval-1; 783 784 dma = (RX_DESC(rx, n+2) & XCT_PTR_ADDR_M); 785 info = &RX_DESC_INFO(rx, buf_index); 786 787 skb = info->skb; 788 789 prefetch_skb(skb); 790 791 len = (macrx & XCT_MACRX_LLEN_M) >> XCT_MACRX_LLEN_S; 792 793 pci_unmap_single(pdev, dma, mac->bufsz - LOCAL_SKB_ALIGN, 794 PCI_DMA_FROMDEVICE); 795 796 if (macrx & XCT_MACRX_CRC) { 797 /* CRC error flagged */ 798 mac->netdev->stats.rx_errors++; 799 mac->netdev->stats.rx_crc_errors++; 800 /* No need to free skb, it'll be reused */ 801 goto next; 802 } 803 804 info->skb = NULL; 805 info->dma = 0; 806 807 if (likely((macrx & XCT_MACRX_HTY_M) == XCT_MACRX_HTY_IPV4_OK)) { 808 skb->ip_summed = CHECKSUM_UNNECESSARY; 809 skb->csum = (macrx & XCT_MACRX_CSUM_M) >> 810 XCT_MACRX_CSUM_S; 811 } else 812 skb_checksum_none_assert(skb); 813 814 packets++; 815 tot_bytes += len; 816 817 /* Don't include CRC */ 818 skb_put(skb, len-4); 819 820 skb->protocol = eth_type_trans(skb, mac->netdev); 821 lro_receive_skb(&mac->lro_mgr, skb, (void *)macrx); 822 823 next: 824 RX_DESC(rx, n) = 0; 825 RX_DESC(rx, n+1) = 0; 826 827 /* Need to zero it out since hardware doesn't, since the 828 * replenish loop uses it to tell when it's done. 829 */ 830 RX_BUFF(rx, buf_index) = 0; 831 832 n += 4; 833 } 834 835 if (n > RX_RING_SIZE) { 836 /* Errata 5971 workaround: L2 target of headers */ 837 write_iob_reg(PAS_IOB_COM_PKTHDRCNT, 0); 838 n &= (RX_RING_SIZE-1); 839 } 840 841 rx_ring(mac)->next_to_clean = n; 842 843 lro_flush_all(&mac->lro_mgr); 844 845 /* Increase is in number of 16-byte entries, and since each descriptor 846 * with an 8BRES takes up 3x8 bytes (padded to 4x8), increase with 847 * count*2. 848 */ 849 write_dma_reg(PAS_DMA_RXCHAN_INCR(mac->rx->chan.chno), count << 1); 850 851 pasemi_mac_replenish_rx_ring(mac->netdev, count); 852 853 mac->netdev->stats.rx_bytes += tot_bytes; 854 mac->netdev->stats.rx_packets += packets; 855 856 spin_unlock(&rx_ring(mac)->lock); 857 858 return count; 859 } 860 861 /* Can't make this too large or we blow the kernel stack limits */ 862 #define TX_CLEAN_BATCHSIZE (128/MAX_SKB_FRAGS) 863 864 static int pasemi_mac_clean_tx(struct pasemi_mac_txring *txring) 865 { 866 struct pasemi_dmachan *chan = &txring->chan; 867 struct pasemi_mac *mac = txring->mac; 868 int i, j; 869 unsigned int start, descr_count, buf_count, batch_limit; 870 unsigned int ring_limit; 871 unsigned int total_count; 872 unsigned long flags; 873 struct sk_buff *skbs[TX_CLEAN_BATCHSIZE]; 874 dma_addr_t dmas[TX_CLEAN_BATCHSIZE][MAX_SKB_FRAGS+1]; 875 int nf[TX_CLEAN_BATCHSIZE]; 876 int nr_frags; 877 878 total_count = 0; 879 batch_limit = TX_CLEAN_BATCHSIZE; 880 restart: 881 spin_lock_irqsave(&txring->lock, flags); 882 883 start = txring->next_to_clean; 884 ring_limit = txring->next_to_fill; 885 886 prefetch(&TX_DESC_INFO(txring, start+1).skb); 887 888 /* Compensate for when fill has wrapped but clean has not */ 889 if (start > ring_limit) 890 ring_limit += TX_RING_SIZE; 891 892 buf_count = 0; 893 descr_count = 0; 894 895 for (i = start; 896 descr_count < batch_limit && i < ring_limit; 897 i += buf_count) { 898 u64 mactx = TX_DESC(txring, i); 899 struct sk_buff *skb; 900 901 if ((mactx & XCT_MACTX_E) || 902 (*chan->status & PAS_STATUS_ERROR)) 903 pasemi_mac_tx_error(mac, mactx); 904 905 /* Skip over control descriptors */ 906 if (!(mactx & XCT_MACTX_LLEN_M)) { 907 TX_DESC(txring, i) = 0; 908 TX_DESC(txring, i+1) = 0; 909 buf_count = 2; 910 continue; 911 } 912 913 skb = TX_DESC_INFO(txring, i+1).skb; 914 nr_frags = TX_DESC_INFO(txring, i).dma; 915 916 if (unlikely(mactx & XCT_MACTX_O)) 917 /* Not yet transmitted */ 918 break; 919 920 buf_count = 2 + nr_frags; 921 /* Since we always fill with an even number of entries, make 922 * sure we skip any unused one at the end as well. 923 */ 924 if (buf_count & 1) 925 buf_count++; 926 927 for (j = 0; j <= nr_frags; j++) 928 dmas[descr_count][j] = TX_DESC_INFO(txring, i+1+j).dma; 929 930 skbs[descr_count] = skb; 931 nf[descr_count] = nr_frags; 932 933 TX_DESC(txring, i) = 0; 934 TX_DESC(txring, i+1) = 0; 935 936 descr_count++; 937 } 938 txring->next_to_clean = i & (TX_RING_SIZE-1); 939 940 spin_unlock_irqrestore(&txring->lock, flags); 941 netif_wake_queue(mac->netdev); 942 943 for (i = 0; i < descr_count; i++) 944 pasemi_mac_unmap_tx_skb(mac, nf[i], skbs[i], dmas[i]); 945 946 total_count += descr_count; 947 948 /* If the batch was full, try to clean more */ 949 if (descr_count == batch_limit) 950 goto restart; 951 952 return total_count; 953 } 954 955 956 static irqreturn_t pasemi_mac_rx_intr(int irq, void *data) 957 { 958 const struct pasemi_mac_rxring *rxring = data; 959 struct pasemi_mac *mac = rxring->mac; 960 const struct pasemi_dmachan *chan = &rxring->chan; 961 unsigned int reg; 962 963 if (!(*chan->status & PAS_STATUS_CAUSE_M)) 964 return IRQ_NONE; 965 966 /* Don't reset packet count so it won't fire again but clear 967 * all others. 968 */ 969 970 reg = 0; 971 if (*chan->status & PAS_STATUS_SOFT) 972 reg |= PAS_IOB_DMA_RXCH_RESET_SINTC; 973 if (*chan->status & PAS_STATUS_ERROR) 974 reg |= PAS_IOB_DMA_RXCH_RESET_DINTC; 975 976 napi_schedule(&mac->napi); 977 978 write_iob_reg(PAS_IOB_DMA_RXCH_RESET(chan->chno), reg); 979 980 return IRQ_HANDLED; 981 } 982 983 #define TX_CLEAN_INTERVAL HZ 984 985 static void pasemi_mac_tx_timer(unsigned long data) 986 { 987 struct pasemi_mac_txring *txring = (struct pasemi_mac_txring *)data; 988 struct pasemi_mac *mac = txring->mac; 989 990 pasemi_mac_clean_tx(txring); 991 992 mod_timer(&txring->clean_timer, jiffies + TX_CLEAN_INTERVAL); 993 994 pasemi_mac_restart_tx_intr(mac); 995 } 996 997 static irqreturn_t pasemi_mac_tx_intr(int irq, void *data) 998 { 999 struct pasemi_mac_txring *txring = data; 1000 const struct pasemi_dmachan *chan = &txring->chan; 1001 struct pasemi_mac *mac = txring->mac; 1002 unsigned int reg; 1003 1004 if (!(*chan->status & PAS_STATUS_CAUSE_M)) 1005 return IRQ_NONE; 1006 1007 reg = 0; 1008 1009 if (*chan->status & PAS_STATUS_SOFT) 1010 reg |= PAS_IOB_DMA_TXCH_RESET_SINTC; 1011 if (*chan->status & PAS_STATUS_ERROR) 1012 reg |= PAS_IOB_DMA_TXCH_RESET_DINTC; 1013 1014 mod_timer(&txring->clean_timer, jiffies + (TX_CLEAN_INTERVAL)*2); 1015 1016 napi_schedule(&mac->napi); 1017 1018 if (reg) 1019 write_iob_reg(PAS_IOB_DMA_TXCH_RESET(chan->chno), reg); 1020 1021 return IRQ_HANDLED; 1022 } 1023 1024 static void pasemi_adjust_link(struct net_device *dev) 1025 { 1026 struct pasemi_mac *mac = netdev_priv(dev); 1027 int msg; 1028 unsigned int flags; 1029 unsigned int new_flags; 1030 1031 if (!mac->phydev->link) { 1032 /* If no link, MAC speed settings don't matter. Just report 1033 * link down and return. 1034 */ 1035 if (mac->link && netif_msg_link(mac)) 1036 printk(KERN_INFO "%s: Link is down.\n", dev->name); 1037 1038 netif_carrier_off(dev); 1039 pasemi_mac_intf_disable(mac); 1040 mac->link = 0; 1041 1042 return; 1043 } else { 1044 pasemi_mac_intf_enable(mac); 1045 netif_carrier_on(dev); 1046 } 1047 1048 flags = read_mac_reg(mac, PAS_MAC_CFG_PCFG); 1049 new_flags = flags & ~(PAS_MAC_CFG_PCFG_HD | PAS_MAC_CFG_PCFG_SPD_M | 1050 PAS_MAC_CFG_PCFG_TSR_M); 1051 1052 if (!mac->phydev->duplex) 1053 new_flags |= PAS_MAC_CFG_PCFG_HD; 1054 1055 switch (mac->phydev->speed) { 1056 case 1000: 1057 new_flags |= PAS_MAC_CFG_PCFG_SPD_1G | 1058 PAS_MAC_CFG_PCFG_TSR_1G; 1059 break; 1060 case 100: 1061 new_flags |= PAS_MAC_CFG_PCFG_SPD_100M | 1062 PAS_MAC_CFG_PCFG_TSR_100M; 1063 break; 1064 case 10: 1065 new_flags |= PAS_MAC_CFG_PCFG_SPD_10M | 1066 PAS_MAC_CFG_PCFG_TSR_10M; 1067 break; 1068 default: 1069 printk("Unsupported speed %d\n", mac->phydev->speed); 1070 } 1071 1072 /* Print on link or speed/duplex change */ 1073 msg = mac->link != mac->phydev->link || flags != new_flags; 1074 1075 mac->duplex = mac->phydev->duplex; 1076 mac->speed = mac->phydev->speed; 1077 mac->link = mac->phydev->link; 1078 1079 if (new_flags != flags) 1080 write_mac_reg(mac, PAS_MAC_CFG_PCFG, new_flags); 1081 1082 if (msg && netif_msg_link(mac)) 1083 printk(KERN_INFO "%s: Link is up at %d Mbps, %s duplex.\n", 1084 dev->name, mac->speed, mac->duplex ? "full" : "half"); 1085 } 1086 1087 static int pasemi_mac_phy_init(struct net_device *dev) 1088 { 1089 struct pasemi_mac *mac = netdev_priv(dev); 1090 struct device_node *dn, *phy_dn; 1091 struct phy_device *phydev; 1092 1093 dn = pci_device_to_OF_node(mac->pdev); 1094 phy_dn = of_parse_phandle(dn, "phy-handle", 0); 1095 of_node_put(phy_dn); 1096 1097 mac->link = 0; 1098 mac->speed = 0; 1099 mac->duplex = -1; 1100 1101 phydev = of_phy_connect(dev, phy_dn, &pasemi_adjust_link, 0, 1102 PHY_INTERFACE_MODE_SGMII); 1103 1104 if (!phydev) { 1105 printk(KERN_ERR "%s: Could not attach to phy\n", dev->name); 1106 return -ENODEV; 1107 } 1108 1109 mac->phydev = phydev; 1110 1111 return 0; 1112 } 1113 1114 1115 static int pasemi_mac_open(struct net_device *dev) 1116 { 1117 struct pasemi_mac *mac = netdev_priv(dev); 1118 unsigned int flags; 1119 int i, ret; 1120 1121 flags = PAS_MAC_CFG_TXP_FCE | PAS_MAC_CFG_TXP_FPC(3) | 1122 PAS_MAC_CFG_TXP_SL(3) | PAS_MAC_CFG_TXP_COB(0xf) | 1123 PAS_MAC_CFG_TXP_TIFT(8) | PAS_MAC_CFG_TXP_TIFG(12); 1124 1125 write_mac_reg(mac, PAS_MAC_CFG_TXP, flags); 1126 1127 ret = pasemi_mac_setup_rx_resources(dev); 1128 if (ret) 1129 goto out_rx_resources; 1130 1131 mac->tx = pasemi_mac_setup_tx_resources(dev); 1132 1133 if (!mac->tx) 1134 goto out_tx_ring; 1135 1136 /* We might already have allocated rings in case mtu was changed 1137 * before interface was brought up. 1138 */ 1139 if (dev->mtu > 1500 && !mac->num_cs) { 1140 pasemi_mac_setup_csrings(mac); 1141 if (!mac->num_cs) 1142 goto out_tx_ring; 1143 } 1144 1145 /* Zero out rmon counters */ 1146 for (i = 0; i < 32; i++) 1147 write_mac_reg(mac, PAS_MAC_RMON(i), 0); 1148 1149 /* 0x3ff with 33MHz clock is about 31us */ 1150 write_iob_reg(PAS_IOB_DMA_COM_TIMEOUTCFG, 1151 PAS_IOB_DMA_COM_TIMEOUTCFG_TCNT(0x3ff)); 1152 1153 write_iob_reg(PAS_IOB_DMA_RXCH_CFG(mac->rx->chan.chno), 1154 PAS_IOB_DMA_RXCH_CFG_CNTTH(256)); 1155 1156 write_iob_reg(PAS_IOB_DMA_TXCH_CFG(mac->tx->chan.chno), 1157 PAS_IOB_DMA_TXCH_CFG_CNTTH(32)); 1158 1159 write_mac_reg(mac, PAS_MAC_IPC_CHNL, 1160 PAS_MAC_IPC_CHNL_DCHNO(mac->rx->chan.chno) | 1161 PAS_MAC_IPC_CHNL_BCH(mac->rx->chan.chno)); 1162 1163 /* enable rx if */ 1164 write_dma_reg(PAS_DMA_RXINT_RCMDSTA(mac->dma_if), 1165 PAS_DMA_RXINT_RCMDSTA_EN | 1166 PAS_DMA_RXINT_RCMDSTA_DROPS_M | 1167 PAS_DMA_RXINT_RCMDSTA_BP | 1168 PAS_DMA_RXINT_RCMDSTA_OO | 1169 PAS_DMA_RXINT_RCMDSTA_BT); 1170 1171 /* enable rx channel */ 1172 pasemi_dma_start_chan(&rx_ring(mac)->chan, PAS_DMA_RXCHAN_CCMDSTA_DU | 1173 PAS_DMA_RXCHAN_CCMDSTA_OD | 1174 PAS_DMA_RXCHAN_CCMDSTA_FD | 1175 PAS_DMA_RXCHAN_CCMDSTA_DT); 1176 1177 /* enable tx channel */ 1178 pasemi_dma_start_chan(&tx_ring(mac)->chan, PAS_DMA_TXCHAN_TCMDSTA_SZ | 1179 PAS_DMA_TXCHAN_TCMDSTA_DB | 1180 PAS_DMA_TXCHAN_TCMDSTA_DE | 1181 PAS_DMA_TXCHAN_TCMDSTA_DA); 1182 1183 pasemi_mac_replenish_rx_ring(dev, RX_RING_SIZE); 1184 1185 write_dma_reg(PAS_DMA_RXCHAN_INCR(rx_ring(mac)->chan.chno), 1186 RX_RING_SIZE>>1); 1187 1188 /* Clear out any residual packet count state from firmware */ 1189 pasemi_mac_restart_rx_intr(mac); 1190 pasemi_mac_restart_tx_intr(mac); 1191 1192 flags = PAS_MAC_CFG_PCFG_S1 | PAS_MAC_CFG_PCFG_PR | PAS_MAC_CFG_PCFG_CE; 1193 1194 if (mac->type == MAC_TYPE_GMAC) 1195 flags |= PAS_MAC_CFG_PCFG_TSR_1G | PAS_MAC_CFG_PCFG_SPD_1G; 1196 else 1197 flags |= PAS_MAC_CFG_PCFG_TSR_10G | PAS_MAC_CFG_PCFG_SPD_10G; 1198 1199 /* Enable interface in MAC */ 1200 write_mac_reg(mac, PAS_MAC_CFG_PCFG, flags); 1201 1202 ret = pasemi_mac_phy_init(dev); 1203 if (ret) { 1204 /* Since we won't get link notification, just enable RX */ 1205 pasemi_mac_intf_enable(mac); 1206 if (mac->type == MAC_TYPE_GMAC) { 1207 /* Warn for missing PHY on SGMII (1Gig) ports */ 1208 dev_warn(&mac->pdev->dev, 1209 "PHY init failed: %d.\n", ret); 1210 dev_warn(&mac->pdev->dev, 1211 "Defaulting to 1Gbit full duplex\n"); 1212 } 1213 } 1214 1215 netif_start_queue(dev); 1216 napi_enable(&mac->napi); 1217 1218 snprintf(mac->tx_irq_name, sizeof(mac->tx_irq_name), "%s tx", 1219 dev->name); 1220 1221 ret = request_irq(mac->tx->chan.irq, pasemi_mac_tx_intr, IRQF_DISABLED, 1222 mac->tx_irq_name, mac->tx); 1223 if (ret) { 1224 dev_err(&mac->pdev->dev, "request_irq of irq %d failed: %d\n", 1225 mac->tx->chan.irq, ret); 1226 goto out_tx_int; 1227 } 1228 1229 snprintf(mac->rx_irq_name, sizeof(mac->rx_irq_name), "%s rx", 1230 dev->name); 1231 1232 ret = request_irq(mac->rx->chan.irq, pasemi_mac_rx_intr, IRQF_DISABLED, 1233 mac->rx_irq_name, mac->rx); 1234 if (ret) { 1235 dev_err(&mac->pdev->dev, "request_irq of irq %d failed: %d\n", 1236 mac->rx->chan.irq, ret); 1237 goto out_rx_int; 1238 } 1239 1240 if (mac->phydev) 1241 phy_start(mac->phydev); 1242 1243 init_timer(&mac->tx->clean_timer); 1244 mac->tx->clean_timer.function = pasemi_mac_tx_timer; 1245 mac->tx->clean_timer.data = (unsigned long)mac->tx; 1246 mac->tx->clean_timer.expires = jiffies+HZ; 1247 add_timer(&mac->tx->clean_timer); 1248 1249 return 0; 1250 1251 out_rx_int: 1252 free_irq(mac->tx->chan.irq, mac->tx); 1253 out_tx_int: 1254 napi_disable(&mac->napi); 1255 netif_stop_queue(dev); 1256 out_tx_ring: 1257 if (mac->tx) 1258 pasemi_mac_free_tx_resources(mac); 1259 pasemi_mac_free_rx_resources(mac); 1260 out_rx_resources: 1261 1262 return ret; 1263 } 1264 1265 #define MAX_RETRIES 5000 1266 1267 static void pasemi_mac_pause_txchan(struct pasemi_mac *mac) 1268 { 1269 unsigned int sta, retries; 1270 int txch = tx_ring(mac)->chan.chno; 1271 1272 write_dma_reg(PAS_DMA_TXCHAN_TCMDSTA(txch), 1273 PAS_DMA_TXCHAN_TCMDSTA_ST); 1274 1275 for (retries = 0; retries < MAX_RETRIES; retries++) { 1276 sta = read_dma_reg(PAS_DMA_TXCHAN_TCMDSTA(txch)); 1277 if (!(sta & PAS_DMA_TXCHAN_TCMDSTA_ACT)) 1278 break; 1279 cond_resched(); 1280 } 1281 1282 if (sta & PAS_DMA_TXCHAN_TCMDSTA_ACT) 1283 dev_err(&mac->dma_pdev->dev, 1284 "Failed to stop tx channel, tcmdsta %08x\n", sta); 1285 1286 write_dma_reg(PAS_DMA_TXCHAN_TCMDSTA(txch), 0); 1287 } 1288 1289 static void pasemi_mac_pause_rxchan(struct pasemi_mac *mac) 1290 { 1291 unsigned int sta, retries; 1292 int rxch = rx_ring(mac)->chan.chno; 1293 1294 write_dma_reg(PAS_DMA_RXCHAN_CCMDSTA(rxch), 1295 PAS_DMA_RXCHAN_CCMDSTA_ST); 1296 for (retries = 0; retries < MAX_RETRIES; retries++) { 1297 sta = read_dma_reg(PAS_DMA_RXCHAN_CCMDSTA(rxch)); 1298 if (!(sta & PAS_DMA_RXCHAN_CCMDSTA_ACT)) 1299 break; 1300 cond_resched(); 1301 } 1302 1303 if (sta & PAS_DMA_RXCHAN_CCMDSTA_ACT) 1304 dev_err(&mac->dma_pdev->dev, 1305 "Failed to stop rx channel, ccmdsta 08%x\n", sta); 1306 write_dma_reg(PAS_DMA_RXCHAN_CCMDSTA(rxch), 0); 1307 } 1308 1309 static void pasemi_mac_pause_rxint(struct pasemi_mac *mac) 1310 { 1311 unsigned int sta, retries; 1312 1313 write_dma_reg(PAS_DMA_RXINT_RCMDSTA(mac->dma_if), 1314 PAS_DMA_RXINT_RCMDSTA_ST); 1315 for (retries = 0; retries < MAX_RETRIES; retries++) { 1316 sta = read_dma_reg(PAS_DMA_RXINT_RCMDSTA(mac->dma_if)); 1317 if (!(sta & PAS_DMA_RXINT_RCMDSTA_ACT)) 1318 break; 1319 cond_resched(); 1320 } 1321 1322 if (sta & PAS_DMA_RXINT_RCMDSTA_ACT) 1323 dev_err(&mac->dma_pdev->dev, 1324 "Failed to stop rx interface, rcmdsta %08x\n", sta); 1325 write_dma_reg(PAS_DMA_RXINT_RCMDSTA(mac->dma_if), 0); 1326 } 1327 1328 static int pasemi_mac_close(struct net_device *dev) 1329 { 1330 struct pasemi_mac *mac = netdev_priv(dev); 1331 unsigned int sta; 1332 int rxch, txch, i; 1333 1334 rxch = rx_ring(mac)->chan.chno; 1335 txch = tx_ring(mac)->chan.chno; 1336 1337 if (mac->phydev) { 1338 phy_stop(mac->phydev); 1339 phy_disconnect(mac->phydev); 1340 } 1341 1342 del_timer_sync(&mac->tx->clean_timer); 1343 1344 netif_stop_queue(dev); 1345 napi_disable(&mac->napi); 1346 1347 sta = read_dma_reg(PAS_DMA_RXINT_RCMDSTA(mac->dma_if)); 1348 if (sta & (PAS_DMA_RXINT_RCMDSTA_BP | 1349 PAS_DMA_RXINT_RCMDSTA_OO | 1350 PAS_DMA_RXINT_RCMDSTA_BT)) 1351 printk(KERN_DEBUG "pasemi_mac: rcmdsta error: 0x%08x\n", sta); 1352 1353 sta = read_dma_reg(PAS_DMA_RXCHAN_CCMDSTA(rxch)); 1354 if (sta & (PAS_DMA_RXCHAN_CCMDSTA_DU | 1355 PAS_DMA_RXCHAN_CCMDSTA_OD | 1356 PAS_DMA_RXCHAN_CCMDSTA_FD | 1357 PAS_DMA_RXCHAN_CCMDSTA_DT)) 1358 printk(KERN_DEBUG "pasemi_mac: ccmdsta error: 0x%08x\n", sta); 1359 1360 sta = read_dma_reg(PAS_DMA_TXCHAN_TCMDSTA(txch)); 1361 if (sta & (PAS_DMA_TXCHAN_TCMDSTA_SZ | PAS_DMA_TXCHAN_TCMDSTA_DB | 1362 PAS_DMA_TXCHAN_TCMDSTA_DE | PAS_DMA_TXCHAN_TCMDSTA_DA)) 1363 printk(KERN_DEBUG "pasemi_mac: tcmdsta error: 0x%08x\n", sta); 1364 1365 /* Clean out any pending buffers */ 1366 pasemi_mac_clean_tx(tx_ring(mac)); 1367 pasemi_mac_clean_rx(rx_ring(mac), RX_RING_SIZE); 1368 1369 pasemi_mac_pause_txchan(mac); 1370 pasemi_mac_pause_rxint(mac); 1371 pasemi_mac_pause_rxchan(mac); 1372 pasemi_mac_intf_disable(mac); 1373 1374 free_irq(mac->tx->chan.irq, mac->tx); 1375 free_irq(mac->rx->chan.irq, mac->rx); 1376 1377 for (i = 0; i < mac->num_cs; i++) { 1378 pasemi_mac_free_csring(mac->cs[i]); 1379 mac->cs[i] = NULL; 1380 } 1381 1382 mac->num_cs = 0; 1383 1384 /* Free resources */ 1385 pasemi_mac_free_rx_resources(mac); 1386 pasemi_mac_free_tx_resources(mac); 1387 1388 return 0; 1389 } 1390 1391 static void pasemi_mac_queue_csdesc(const struct sk_buff *skb, 1392 const dma_addr_t *map, 1393 const unsigned int *map_size, 1394 struct pasemi_mac_txring *txring, 1395 struct pasemi_mac_csring *csring) 1396 { 1397 u64 fund; 1398 dma_addr_t cs_dest; 1399 const int nh_off = skb_network_offset(skb); 1400 const int nh_len = skb_network_header_len(skb); 1401 const int nfrags = skb_shinfo(skb)->nr_frags; 1402 int cs_size, i, fill, hdr, cpyhdr, evt; 1403 dma_addr_t csdma; 1404 1405 fund = XCT_FUN_ST | XCT_FUN_RR_8BRES | 1406 XCT_FUN_O | XCT_FUN_FUN(csring->fun) | 1407 XCT_FUN_CRM_SIG | XCT_FUN_LLEN(skb->len - nh_off) | 1408 XCT_FUN_SHL(nh_len >> 2) | XCT_FUN_SE; 1409 1410 switch (ip_hdr(skb)->protocol) { 1411 case IPPROTO_TCP: 1412 fund |= XCT_FUN_SIG_TCP4; 1413 /* TCP checksum is 16 bytes into the header */ 1414 cs_dest = map[0] + skb_transport_offset(skb) + 16; 1415 break; 1416 case IPPROTO_UDP: 1417 fund |= XCT_FUN_SIG_UDP4; 1418 /* UDP checksum is 6 bytes into the header */ 1419 cs_dest = map[0] + skb_transport_offset(skb) + 6; 1420 break; 1421 default: 1422 BUG(); 1423 } 1424 1425 /* Do the checksum offloaded */ 1426 fill = csring->next_to_fill; 1427 hdr = fill; 1428 1429 CS_DESC(csring, fill++) = fund; 1430 /* Room for 8BRES. Checksum result is really 2 bytes into it */ 1431 csdma = csring->chan.ring_dma + (fill & (CS_RING_SIZE-1)) * 8 + 2; 1432 CS_DESC(csring, fill++) = 0; 1433 1434 CS_DESC(csring, fill) = XCT_PTR_LEN(map_size[0]-nh_off) | XCT_PTR_ADDR(map[0]+nh_off); 1435 for (i = 1; i <= nfrags; i++) 1436 CS_DESC(csring, fill+i) = XCT_PTR_LEN(map_size[i]) | XCT_PTR_ADDR(map[i]); 1437 1438 fill += i; 1439 if (fill & 1) 1440 fill++; 1441 1442 /* Copy the result into the TCP packet */ 1443 cpyhdr = fill; 1444 CS_DESC(csring, fill++) = XCT_FUN_O | XCT_FUN_FUN(csring->fun) | 1445 XCT_FUN_LLEN(2) | XCT_FUN_SE; 1446 CS_DESC(csring, fill++) = XCT_PTR_LEN(2) | XCT_PTR_ADDR(cs_dest) | XCT_PTR_T; 1447 CS_DESC(csring, fill++) = XCT_PTR_LEN(2) | XCT_PTR_ADDR(csdma); 1448 fill++; 1449 1450 evt = !csring->last_event; 1451 csring->last_event = evt; 1452 1453 /* Event handshaking with MAC TX */ 1454 CS_DESC(csring, fill++) = CTRL_CMD_T | CTRL_CMD_META_EVT | CTRL_CMD_O | 1455 CTRL_CMD_ETYPE_SET | CTRL_CMD_REG(csring->events[evt]); 1456 CS_DESC(csring, fill++) = 0; 1457 CS_DESC(csring, fill++) = CTRL_CMD_T | CTRL_CMD_META_EVT | CTRL_CMD_O | 1458 CTRL_CMD_ETYPE_WCLR | CTRL_CMD_REG(csring->events[!evt]); 1459 CS_DESC(csring, fill++) = 0; 1460 csring->next_to_fill = fill & (CS_RING_SIZE-1); 1461 1462 cs_size = fill - hdr; 1463 write_dma_reg(PAS_DMA_TXCHAN_INCR(csring->chan.chno), (cs_size) >> 1); 1464 1465 /* TX-side event handshaking */ 1466 fill = txring->next_to_fill; 1467 TX_DESC(txring, fill++) = CTRL_CMD_T | CTRL_CMD_META_EVT | CTRL_CMD_O | 1468 CTRL_CMD_ETYPE_WSET | CTRL_CMD_REG(csring->events[evt]); 1469 TX_DESC(txring, fill++) = 0; 1470 TX_DESC(txring, fill++) = CTRL_CMD_T | CTRL_CMD_META_EVT | CTRL_CMD_O | 1471 CTRL_CMD_ETYPE_CLR | CTRL_CMD_REG(csring->events[!evt]); 1472 TX_DESC(txring, fill++) = 0; 1473 txring->next_to_fill = fill; 1474 1475 write_dma_reg(PAS_DMA_TXCHAN_INCR(txring->chan.chno), 2); 1476 } 1477 1478 static int pasemi_mac_start_tx(struct sk_buff *skb, struct net_device *dev) 1479 { 1480 struct pasemi_mac * const mac = netdev_priv(dev); 1481 struct pasemi_mac_txring * const txring = tx_ring(mac); 1482 struct pasemi_mac_csring *csring; 1483 u64 dflags = 0; 1484 u64 mactx; 1485 dma_addr_t map[MAX_SKB_FRAGS+1]; 1486 unsigned int map_size[MAX_SKB_FRAGS+1]; 1487 unsigned long flags; 1488 int i, nfrags; 1489 int fill; 1490 const int nh_off = skb_network_offset(skb); 1491 const int nh_len = skb_network_header_len(skb); 1492 1493 prefetch(&txring->ring_info); 1494 1495 dflags = XCT_MACTX_O | XCT_MACTX_ST | XCT_MACTX_CRC_PAD; 1496 1497 nfrags = skb_shinfo(skb)->nr_frags; 1498 1499 map[0] = pci_map_single(mac->dma_pdev, skb->data, skb_headlen(skb), 1500 PCI_DMA_TODEVICE); 1501 map_size[0] = skb_headlen(skb); 1502 if (pci_dma_mapping_error(mac->dma_pdev, map[0])) 1503 goto out_err_nolock; 1504 1505 for (i = 0; i < nfrags; i++) { 1506 skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; 1507 1508 map[i + 1] = skb_frag_dma_map(&mac->dma_pdev->dev, frag, 0, 1509 skb_frag_size(frag), DMA_TO_DEVICE); 1510 map_size[i+1] = skb_frag_size(frag); 1511 if (dma_mapping_error(&mac->dma_pdev->dev, map[i + 1])) { 1512 nfrags = i; 1513 goto out_err_nolock; 1514 } 1515 } 1516 1517 if (skb->ip_summed == CHECKSUM_PARTIAL && skb->len <= 1540) { 1518 switch (ip_hdr(skb)->protocol) { 1519 case IPPROTO_TCP: 1520 dflags |= XCT_MACTX_CSUM_TCP; 1521 dflags |= XCT_MACTX_IPH(nh_len >> 2); 1522 dflags |= XCT_MACTX_IPO(nh_off); 1523 break; 1524 case IPPROTO_UDP: 1525 dflags |= XCT_MACTX_CSUM_UDP; 1526 dflags |= XCT_MACTX_IPH(nh_len >> 2); 1527 dflags |= XCT_MACTX_IPO(nh_off); 1528 break; 1529 default: 1530 WARN_ON(1); 1531 } 1532 } 1533 1534 mactx = dflags | XCT_MACTX_LLEN(skb->len); 1535 1536 spin_lock_irqsave(&txring->lock, flags); 1537 1538 /* Avoid stepping on the same cache line that the DMA controller 1539 * is currently about to send, so leave at least 8 words available. 1540 * Total free space needed is mactx + fragments + 8 1541 */ 1542 if (RING_AVAIL(txring) < nfrags + 14) { 1543 /* no room -- stop the queue and wait for tx intr */ 1544 netif_stop_queue(dev); 1545 goto out_err; 1546 } 1547 1548 /* Queue up checksum + event descriptors, if needed */ 1549 if (mac->num_cs && skb->ip_summed == CHECKSUM_PARTIAL && skb->len > 1540) { 1550 csring = mac->cs[mac->last_cs]; 1551 mac->last_cs = (mac->last_cs + 1) % mac->num_cs; 1552 1553 pasemi_mac_queue_csdesc(skb, map, map_size, txring, csring); 1554 } 1555 1556 fill = txring->next_to_fill; 1557 TX_DESC(txring, fill) = mactx; 1558 TX_DESC_INFO(txring, fill).dma = nfrags; 1559 fill++; 1560 TX_DESC_INFO(txring, fill).skb = skb; 1561 for (i = 0; i <= nfrags; i++) { 1562 TX_DESC(txring, fill+i) = 1563 XCT_PTR_LEN(map_size[i]) | XCT_PTR_ADDR(map[i]); 1564 TX_DESC_INFO(txring, fill+i).dma = map[i]; 1565 } 1566 1567 /* We have to add an even number of 8-byte entries to the ring 1568 * even if the last one is unused. That means always an odd number 1569 * of pointers + one mactx descriptor. 1570 */ 1571 if (nfrags & 1) 1572 nfrags++; 1573 1574 txring->next_to_fill = (fill + nfrags + 1) & (TX_RING_SIZE-1); 1575 1576 dev->stats.tx_packets++; 1577 dev->stats.tx_bytes += skb->len; 1578 1579 spin_unlock_irqrestore(&txring->lock, flags); 1580 1581 write_dma_reg(PAS_DMA_TXCHAN_INCR(txring->chan.chno), (nfrags+2) >> 1); 1582 1583 return NETDEV_TX_OK; 1584 1585 out_err: 1586 spin_unlock_irqrestore(&txring->lock, flags); 1587 out_err_nolock: 1588 while (nfrags--) 1589 pci_unmap_single(mac->dma_pdev, map[nfrags], map_size[nfrags], 1590 PCI_DMA_TODEVICE); 1591 1592 return NETDEV_TX_BUSY; 1593 } 1594 1595 static void pasemi_mac_set_rx_mode(struct net_device *dev) 1596 { 1597 const struct pasemi_mac *mac = netdev_priv(dev); 1598 unsigned int flags; 1599 1600 flags = read_mac_reg(mac, PAS_MAC_CFG_PCFG); 1601 1602 /* Set promiscuous */ 1603 if (dev->flags & IFF_PROMISC) 1604 flags |= PAS_MAC_CFG_PCFG_PR; 1605 else 1606 flags &= ~PAS_MAC_CFG_PCFG_PR; 1607 1608 write_mac_reg(mac, PAS_MAC_CFG_PCFG, flags); 1609 } 1610 1611 1612 static int pasemi_mac_poll(struct napi_struct *napi, int budget) 1613 { 1614 struct pasemi_mac *mac = container_of(napi, struct pasemi_mac, napi); 1615 int pkts; 1616 1617 pasemi_mac_clean_tx(tx_ring(mac)); 1618 pkts = pasemi_mac_clean_rx(rx_ring(mac), budget); 1619 if (pkts < budget) { 1620 /* all done, no more packets present */ 1621 napi_complete(napi); 1622 1623 pasemi_mac_restart_rx_intr(mac); 1624 pasemi_mac_restart_tx_intr(mac); 1625 } 1626 return pkts; 1627 } 1628 1629 #ifdef CONFIG_NET_POLL_CONTROLLER 1630 /* 1631 * Polling 'interrupt' - used by things like netconsole to send skbs 1632 * without having to re-enable interrupts. It's not called while 1633 * the interrupt routine is executing. 1634 */ 1635 static void pasemi_mac_netpoll(struct net_device *dev) 1636 { 1637 const struct pasemi_mac *mac = netdev_priv(dev); 1638 1639 disable_irq(mac->tx->chan.irq); 1640 pasemi_mac_tx_intr(mac->tx->chan.irq, mac->tx); 1641 enable_irq(mac->tx->chan.irq); 1642 1643 disable_irq(mac->rx->chan.irq); 1644 pasemi_mac_rx_intr(mac->rx->chan.irq, mac->rx); 1645 enable_irq(mac->rx->chan.irq); 1646 } 1647 #endif 1648 1649 static int pasemi_mac_change_mtu(struct net_device *dev, int new_mtu) 1650 { 1651 struct pasemi_mac *mac = netdev_priv(dev); 1652 unsigned int reg; 1653 unsigned int rcmdsta = 0; 1654 int running; 1655 int ret = 0; 1656 1657 if (new_mtu < PE_MIN_MTU || new_mtu > PE_MAX_MTU) 1658 return -EINVAL; 1659 1660 running = netif_running(dev); 1661 1662 if (running) { 1663 /* Need to stop the interface, clean out all already 1664 * received buffers, free all unused buffers on the RX 1665 * interface ring, then finally re-fill the rx ring with 1666 * the new-size buffers and restart. 1667 */ 1668 1669 napi_disable(&mac->napi); 1670 netif_tx_disable(dev); 1671 pasemi_mac_intf_disable(mac); 1672 1673 rcmdsta = read_dma_reg(PAS_DMA_RXINT_RCMDSTA(mac->dma_if)); 1674 pasemi_mac_pause_rxint(mac); 1675 pasemi_mac_clean_rx(rx_ring(mac), RX_RING_SIZE); 1676 pasemi_mac_free_rx_buffers(mac); 1677 1678 } 1679 1680 /* Setup checksum channels if large MTU and none already allocated */ 1681 if (new_mtu > 1500 && !mac->num_cs) { 1682 pasemi_mac_setup_csrings(mac); 1683 if (!mac->num_cs) { 1684 ret = -ENOMEM; 1685 goto out; 1686 } 1687 } 1688 1689 /* Change maxf, i.e. what size frames are accepted. 1690 * Need room for ethernet header and CRC word 1691 */ 1692 reg = read_mac_reg(mac, PAS_MAC_CFG_MACCFG); 1693 reg &= ~PAS_MAC_CFG_MACCFG_MAXF_M; 1694 reg |= PAS_MAC_CFG_MACCFG_MAXF(new_mtu + ETH_HLEN + 4); 1695 write_mac_reg(mac, PAS_MAC_CFG_MACCFG, reg); 1696 1697 dev->mtu = new_mtu; 1698 /* MTU + ETH_HLEN + VLAN_HLEN + 2 64B cachelines */ 1699 mac->bufsz = new_mtu + ETH_HLEN + ETH_FCS_LEN + LOCAL_SKB_ALIGN + 128; 1700 1701 out: 1702 if (running) { 1703 write_dma_reg(PAS_DMA_RXINT_RCMDSTA(mac->dma_if), 1704 rcmdsta | PAS_DMA_RXINT_RCMDSTA_EN); 1705 1706 rx_ring(mac)->next_to_fill = 0; 1707 pasemi_mac_replenish_rx_ring(dev, RX_RING_SIZE-1); 1708 1709 napi_enable(&mac->napi); 1710 netif_start_queue(dev); 1711 pasemi_mac_intf_enable(mac); 1712 } 1713 1714 return ret; 1715 } 1716 1717 static const struct net_device_ops pasemi_netdev_ops = { 1718 .ndo_open = pasemi_mac_open, 1719 .ndo_stop = pasemi_mac_close, 1720 .ndo_start_xmit = pasemi_mac_start_tx, 1721 .ndo_set_rx_mode = pasemi_mac_set_rx_mode, 1722 .ndo_set_mac_address = pasemi_mac_set_mac_addr, 1723 .ndo_change_mtu = pasemi_mac_change_mtu, 1724 .ndo_validate_addr = eth_validate_addr, 1725 #ifdef CONFIG_NET_POLL_CONTROLLER 1726 .ndo_poll_controller = pasemi_mac_netpoll, 1727 #endif 1728 }; 1729 1730 static int 1731 pasemi_mac_probe(struct pci_dev *pdev, const struct pci_device_id *ent) 1732 { 1733 struct net_device *dev; 1734 struct pasemi_mac *mac; 1735 int err, ret; 1736 1737 err = pci_enable_device(pdev); 1738 if (err) 1739 return err; 1740 1741 dev = alloc_etherdev(sizeof(struct pasemi_mac)); 1742 if (dev == NULL) { 1743 err = -ENOMEM; 1744 goto out_disable_device; 1745 } 1746 1747 pci_set_drvdata(pdev, dev); 1748 SET_NETDEV_DEV(dev, &pdev->dev); 1749 1750 mac = netdev_priv(dev); 1751 1752 mac->pdev = pdev; 1753 mac->netdev = dev; 1754 1755 netif_napi_add(dev, &mac->napi, pasemi_mac_poll, 64); 1756 1757 dev->features = NETIF_F_IP_CSUM | NETIF_F_LLTX | NETIF_F_SG | 1758 NETIF_F_HIGHDMA | NETIF_F_GSO; 1759 1760 mac->lro_mgr.max_aggr = LRO_MAX_AGGR; 1761 mac->lro_mgr.max_desc = MAX_LRO_DESCRIPTORS; 1762 mac->lro_mgr.lro_arr = mac->lro_desc; 1763 mac->lro_mgr.get_skb_header = get_skb_hdr; 1764 mac->lro_mgr.features = LRO_F_NAPI | LRO_F_EXTRACT_VLAN_ID; 1765 mac->lro_mgr.dev = mac->netdev; 1766 mac->lro_mgr.ip_summed = CHECKSUM_UNNECESSARY; 1767 mac->lro_mgr.ip_summed_aggr = CHECKSUM_UNNECESSARY; 1768 1769 1770 mac->dma_pdev = pci_get_device(PCI_VENDOR_ID_PASEMI, 0xa007, NULL); 1771 if (!mac->dma_pdev) { 1772 dev_err(&mac->pdev->dev, "Can't find DMA Controller\n"); 1773 err = -ENODEV; 1774 goto out; 1775 } 1776 1777 mac->iob_pdev = pci_get_device(PCI_VENDOR_ID_PASEMI, 0xa001, NULL); 1778 if (!mac->iob_pdev) { 1779 dev_err(&mac->pdev->dev, "Can't find I/O Bridge\n"); 1780 err = -ENODEV; 1781 goto out; 1782 } 1783 1784 /* get mac addr from device tree */ 1785 if (pasemi_get_mac_addr(mac) || !is_valid_ether_addr(mac->mac_addr)) { 1786 err = -ENODEV; 1787 goto out; 1788 } 1789 memcpy(dev->dev_addr, mac->mac_addr, sizeof(mac->mac_addr)); 1790 1791 ret = mac_to_intf(mac); 1792 if (ret < 0) { 1793 dev_err(&mac->pdev->dev, "Can't map DMA interface\n"); 1794 err = -ENODEV; 1795 goto out; 1796 } 1797 mac->dma_if = ret; 1798 1799 switch (pdev->device) { 1800 case 0xa005: 1801 mac->type = MAC_TYPE_GMAC; 1802 break; 1803 case 0xa006: 1804 mac->type = MAC_TYPE_XAUI; 1805 break; 1806 default: 1807 err = -ENODEV; 1808 goto out; 1809 } 1810 1811 dev->netdev_ops = &pasemi_netdev_ops; 1812 dev->mtu = PE_DEF_MTU; 1813 /* 1500 MTU + ETH_HLEN + VLAN_HLEN + 2 64B cachelines */ 1814 mac->bufsz = dev->mtu + ETH_HLEN + ETH_FCS_LEN + LOCAL_SKB_ALIGN + 128; 1815 1816 dev->ethtool_ops = &pasemi_mac_ethtool_ops; 1817 1818 if (err) 1819 goto out; 1820 1821 mac->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE); 1822 1823 /* Enable most messages by default */ 1824 mac->msg_enable = (NETIF_MSG_IFUP << 1 ) - 1; 1825 1826 err = register_netdev(dev); 1827 1828 if (err) { 1829 dev_err(&mac->pdev->dev, "register_netdev failed with error %d\n", 1830 err); 1831 goto out; 1832 } else if netif_msg_probe(mac) 1833 printk(KERN_INFO "%s: PA Semi %s: intf %d, hw addr %pM\n", 1834 dev->name, mac->type == MAC_TYPE_GMAC ? "GMAC" : "XAUI", 1835 mac->dma_if, dev->dev_addr); 1836 1837 return err; 1838 1839 out: 1840 if (mac->iob_pdev) 1841 pci_dev_put(mac->iob_pdev); 1842 if (mac->dma_pdev) 1843 pci_dev_put(mac->dma_pdev); 1844 1845 free_netdev(dev); 1846 out_disable_device: 1847 pci_disable_device(pdev); 1848 return err; 1849 1850 } 1851 1852 static void pasemi_mac_remove(struct pci_dev *pdev) 1853 { 1854 struct net_device *netdev = pci_get_drvdata(pdev); 1855 struct pasemi_mac *mac; 1856 1857 if (!netdev) 1858 return; 1859 1860 mac = netdev_priv(netdev); 1861 1862 unregister_netdev(netdev); 1863 1864 pci_disable_device(pdev); 1865 pci_dev_put(mac->dma_pdev); 1866 pci_dev_put(mac->iob_pdev); 1867 1868 pasemi_dma_free_chan(&mac->tx->chan); 1869 pasemi_dma_free_chan(&mac->rx->chan); 1870 1871 pci_set_drvdata(pdev, NULL); 1872 free_netdev(netdev); 1873 } 1874 1875 static DEFINE_PCI_DEVICE_TABLE(pasemi_mac_pci_tbl) = { 1876 { PCI_DEVICE(PCI_VENDOR_ID_PASEMI, 0xa005) }, 1877 { PCI_DEVICE(PCI_VENDOR_ID_PASEMI, 0xa006) }, 1878 { }, 1879 }; 1880 1881 MODULE_DEVICE_TABLE(pci, pasemi_mac_pci_tbl); 1882 1883 static struct pci_driver pasemi_mac_driver = { 1884 .name = "pasemi_mac", 1885 .id_table = pasemi_mac_pci_tbl, 1886 .probe = pasemi_mac_probe, 1887 .remove = pasemi_mac_remove, 1888 }; 1889 1890 static void __exit pasemi_mac_cleanup_module(void) 1891 { 1892 pci_unregister_driver(&pasemi_mac_driver); 1893 } 1894 1895 int pasemi_mac_init_module(void) 1896 { 1897 int err; 1898 1899 err = pasemi_dma_init(); 1900 if (err) 1901 return err; 1902 1903 return pci_register_driver(&pasemi_mac_driver); 1904 } 1905 1906 module_init(pasemi_mac_init_module); 1907 module_exit(pasemi_mac_cleanup_module); 1908