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