1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Applied Micro X-Gene SoC Ethernet v2 Driver 4 * 5 * Copyright (c) 2017, Applied Micro Circuits Corporation 6 * Author(s): Iyappan Subramanian <isubramanian@apm.com> 7 * Keyur Chudgar <kchudgar@apm.com> 8 */ 9 10 #include "main.h" 11 12 static const struct acpi_device_id xge_acpi_match[]; 13 14 static int xge_get_resources(struct xge_pdata *pdata) 15 { 16 struct platform_device *pdev; 17 struct net_device *ndev; 18 int phy_mode, ret = 0; 19 struct resource *res; 20 struct device *dev; 21 22 pdev = pdata->pdev; 23 dev = &pdev->dev; 24 ndev = pdata->ndev; 25 26 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 27 if (!res) { 28 dev_err(dev, "Resource enet_csr not defined\n"); 29 return -ENODEV; 30 } 31 32 pdata->resources.base_addr = devm_ioremap(dev, res->start, 33 resource_size(res)); 34 if (!pdata->resources.base_addr) { 35 dev_err(dev, "Unable to retrieve ENET Port CSR region\n"); 36 return -ENOMEM; 37 } 38 39 if (device_get_ethdev_address(dev, ndev)) 40 eth_hw_addr_random(ndev); 41 42 memcpy(ndev->perm_addr, ndev->dev_addr, ndev->addr_len); 43 44 phy_mode = device_get_phy_mode(dev); 45 if (phy_mode < 0) { 46 dev_err(dev, "Unable to get phy-connection-type\n"); 47 return phy_mode; 48 } 49 pdata->resources.phy_mode = phy_mode; 50 51 if (pdata->resources.phy_mode != PHY_INTERFACE_MODE_RGMII) { 52 dev_err(dev, "Incorrect phy-connection-type specified\n"); 53 return -ENODEV; 54 } 55 56 ret = platform_get_irq(pdev, 0); 57 if (ret < 0) 58 return ret; 59 pdata->resources.irq = ret; 60 61 return 0; 62 } 63 64 static int xge_refill_buffers(struct net_device *ndev, u32 nbuf) 65 { 66 struct xge_pdata *pdata = netdev_priv(ndev); 67 struct xge_desc_ring *ring = pdata->rx_ring; 68 const u8 slots = XGENE_ENET_NUM_DESC - 1; 69 struct device *dev = &pdata->pdev->dev; 70 struct xge_raw_desc *raw_desc; 71 u64 addr_lo, addr_hi; 72 u8 tail = ring->tail; 73 struct sk_buff *skb; 74 dma_addr_t dma_addr; 75 u16 len; 76 int i; 77 78 for (i = 0; i < nbuf; i++) { 79 raw_desc = &ring->raw_desc[tail]; 80 81 len = XGENE_ENET_STD_MTU; 82 skb = netdev_alloc_skb(ndev, len); 83 if (unlikely(!skb)) 84 return -ENOMEM; 85 86 dma_addr = dma_map_single(dev, skb->data, len, DMA_FROM_DEVICE); 87 if (dma_mapping_error(dev, dma_addr)) { 88 netdev_err(ndev, "DMA mapping error\n"); 89 dev_kfree_skb_any(skb); 90 return -EINVAL; 91 } 92 93 ring->pkt_info[tail].skb = skb; 94 ring->pkt_info[tail].dma_addr = dma_addr; 95 96 addr_hi = GET_BITS(NEXT_DESC_ADDRH, le64_to_cpu(raw_desc->m1)); 97 addr_lo = GET_BITS(NEXT_DESC_ADDRL, le64_to_cpu(raw_desc->m1)); 98 raw_desc->m1 = cpu_to_le64(SET_BITS(NEXT_DESC_ADDRL, addr_lo) | 99 SET_BITS(NEXT_DESC_ADDRH, addr_hi) | 100 SET_BITS(PKT_ADDRH, 101 upper_32_bits(dma_addr))); 102 103 dma_wmb(); 104 raw_desc->m0 = cpu_to_le64(SET_BITS(PKT_ADDRL, dma_addr) | 105 SET_BITS(E, 1)); 106 tail = (tail + 1) & slots; 107 } 108 109 ring->tail = tail; 110 111 return 0; 112 } 113 114 static int xge_init_hw(struct net_device *ndev) 115 { 116 struct xge_pdata *pdata = netdev_priv(ndev); 117 int ret; 118 119 ret = xge_port_reset(ndev); 120 if (ret) 121 return ret; 122 123 xge_port_init(ndev); 124 pdata->nbufs = NUM_BUFS; 125 126 return 0; 127 } 128 129 static irqreturn_t xge_irq(const int irq, void *data) 130 { 131 struct xge_pdata *pdata = data; 132 133 if (napi_schedule_prep(&pdata->napi)) { 134 xge_intr_disable(pdata); 135 __napi_schedule(&pdata->napi); 136 } 137 138 return IRQ_HANDLED; 139 } 140 141 static int xge_request_irq(struct net_device *ndev) 142 { 143 struct xge_pdata *pdata = netdev_priv(ndev); 144 int ret; 145 146 snprintf(pdata->irq_name, IRQ_ID_SIZE, "%s", ndev->name); 147 148 ret = request_irq(pdata->resources.irq, xge_irq, 0, pdata->irq_name, 149 pdata); 150 if (ret) 151 netdev_err(ndev, "Failed to request irq %s\n", pdata->irq_name); 152 153 return ret; 154 } 155 156 static void xge_free_irq(struct net_device *ndev) 157 { 158 struct xge_pdata *pdata = netdev_priv(ndev); 159 160 free_irq(pdata->resources.irq, pdata); 161 } 162 163 static bool is_tx_slot_available(struct xge_raw_desc *raw_desc) 164 { 165 if (GET_BITS(E, le64_to_cpu(raw_desc->m0)) && 166 (GET_BITS(PKT_SIZE, le64_to_cpu(raw_desc->m0)) == SLOT_EMPTY)) 167 return true; 168 169 return false; 170 } 171 172 static netdev_tx_t xge_start_xmit(struct sk_buff *skb, struct net_device *ndev) 173 { 174 struct xge_pdata *pdata = netdev_priv(ndev); 175 struct device *dev = &pdata->pdev->dev; 176 struct xge_desc_ring *tx_ring; 177 struct xge_raw_desc *raw_desc; 178 static dma_addr_t dma_addr; 179 u64 addr_lo, addr_hi; 180 void *pkt_buf; 181 u8 tail; 182 u16 len; 183 184 tx_ring = pdata->tx_ring; 185 tail = tx_ring->tail; 186 len = skb_headlen(skb); 187 raw_desc = &tx_ring->raw_desc[tail]; 188 189 if (!is_tx_slot_available(raw_desc)) { 190 netif_stop_queue(ndev); 191 return NETDEV_TX_BUSY; 192 } 193 194 /* Packet buffers should be 64B aligned */ 195 pkt_buf = dma_alloc_coherent(dev, XGENE_ENET_STD_MTU, &dma_addr, 196 GFP_ATOMIC); 197 if (unlikely(!pkt_buf)) { 198 dev_kfree_skb_any(skb); 199 return NETDEV_TX_OK; 200 } 201 memcpy(pkt_buf, skb->data, len); 202 203 addr_hi = GET_BITS(NEXT_DESC_ADDRH, le64_to_cpu(raw_desc->m1)); 204 addr_lo = GET_BITS(NEXT_DESC_ADDRL, le64_to_cpu(raw_desc->m1)); 205 raw_desc->m1 = cpu_to_le64(SET_BITS(NEXT_DESC_ADDRL, addr_lo) | 206 SET_BITS(NEXT_DESC_ADDRH, addr_hi) | 207 SET_BITS(PKT_ADDRH, 208 upper_32_bits(dma_addr))); 209 210 tx_ring->pkt_info[tail].skb = skb; 211 tx_ring->pkt_info[tail].dma_addr = dma_addr; 212 tx_ring->pkt_info[tail].pkt_buf = pkt_buf; 213 214 dma_wmb(); 215 216 raw_desc->m0 = cpu_to_le64(SET_BITS(PKT_ADDRL, dma_addr) | 217 SET_BITS(PKT_SIZE, len) | 218 SET_BITS(E, 0)); 219 skb_tx_timestamp(skb); 220 xge_wr_csr(pdata, DMATXCTRL, 1); 221 222 tx_ring->tail = (tail + 1) & (XGENE_ENET_NUM_DESC - 1); 223 224 return NETDEV_TX_OK; 225 } 226 227 static bool is_tx_hw_done(struct xge_raw_desc *raw_desc) 228 { 229 if (GET_BITS(E, le64_to_cpu(raw_desc->m0)) && 230 !GET_BITS(PKT_SIZE, le64_to_cpu(raw_desc->m0))) 231 return true; 232 233 return false; 234 } 235 236 static void xge_txc_poll(struct net_device *ndev) 237 { 238 struct xge_pdata *pdata = netdev_priv(ndev); 239 struct device *dev = &pdata->pdev->dev; 240 struct xge_desc_ring *tx_ring; 241 struct xge_raw_desc *raw_desc; 242 dma_addr_t dma_addr; 243 struct sk_buff *skb; 244 void *pkt_buf; 245 u32 data; 246 u8 head; 247 248 tx_ring = pdata->tx_ring; 249 head = tx_ring->head; 250 251 data = xge_rd_csr(pdata, DMATXSTATUS); 252 if (!GET_BITS(TXPKTCOUNT, data)) 253 return; 254 255 while (1) { 256 raw_desc = &tx_ring->raw_desc[head]; 257 258 if (!is_tx_hw_done(raw_desc)) 259 break; 260 261 dma_rmb(); 262 263 skb = tx_ring->pkt_info[head].skb; 264 dma_addr = tx_ring->pkt_info[head].dma_addr; 265 pkt_buf = tx_ring->pkt_info[head].pkt_buf; 266 pdata->stats.tx_packets++; 267 pdata->stats.tx_bytes += skb->len; 268 dma_free_coherent(dev, XGENE_ENET_STD_MTU, pkt_buf, dma_addr); 269 dev_kfree_skb_any(skb); 270 271 /* clear pktstart address and pktsize */ 272 raw_desc->m0 = cpu_to_le64(SET_BITS(E, 1) | 273 SET_BITS(PKT_SIZE, SLOT_EMPTY)); 274 xge_wr_csr(pdata, DMATXSTATUS, 1); 275 276 head = (head + 1) & (XGENE_ENET_NUM_DESC - 1); 277 } 278 279 if (netif_queue_stopped(ndev)) 280 netif_wake_queue(ndev); 281 282 tx_ring->head = head; 283 } 284 285 static int xge_rx_poll(struct net_device *ndev, unsigned int budget) 286 { 287 struct xge_pdata *pdata = netdev_priv(ndev); 288 struct device *dev = &pdata->pdev->dev; 289 struct xge_desc_ring *rx_ring; 290 struct xge_raw_desc *raw_desc; 291 struct sk_buff *skb; 292 dma_addr_t dma_addr; 293 int processed = 0; 294 u8 head, rx_error; 295 int i, ret; 296 u32 data; 297 u16 len; 298 299 rx_ring = pdata->rx_ring; 300 head = rx_ring->head; 301 302 data = xge_rd_csr(pdata, DMARXSTATUS); 303 if (!GET_BITS(RXPKTCOUNT, data)) 304 return 0; 305 306 for (i = 0; i < budget; i++) { 307 raw_desc = &rx_ring->raw_desc[head]; 308 309 if (GET_BITS(E, le64_to_cpu(raw_desc->m0))) 310 break; 311 312 dma_rmb(); 313 314 skb = rx_ring->pkt_info[head].skb; 315 rx_ring->pkt_info[head].skb = NULL; 316 dma_addr = rx_ring->pkt_info[head].dma_addr; 317 len = GET_BITS(PKT_SIZE, le64_to_cpu(raw_desc->m0)); 318 dma_unmap_single(dev, dma_addr, XGENE_ENET_STD_MTU, 319 DMA_FROM_DEVICE); 320 321 rx_error = GET_BITS(D, le64_to_cpu(raw_desc->m2)); 322 if (unlikely(rx_error)) { 323 pdata->stats.rx_errors++; 324 dev_kfree_skb_any(skb); 325 goto out; 326 } 327 328 skb_put(skb, len); 329 skb->protocol = eth_type_trans(skb, ndev); 330 331 pdata->stats.rx_packets++; 332 pdata->stats.rx_bytes += len; 333 napi_gro_receive(&pdata->napi, skb); 334 out: 335 ret = xge_refill_buffers(ndev, 1); 336 xge_wr_csr(pdata, DMARXSTATUS, 1); 337 xge_wr_csr(pdata, DMARXCTRL, 1); 338 339 if (ret) 340 break; 341 342 head = (head + 1) & (XGENE_ENET_NUM_DESC - 1); 343 processed++; 344 } 345 346 rx_ring->head = head; 347 348 return processed; 349 } 350 351 static void xge_delete_desc_ring(struct net_device *ndev, 352 struct xge_desc_ring *ring) 353 { 354 struct xge_pdata *pdata = netdev_priv(ndev); 355 struct device *dev = &pdata->pdev->dev; 356 u16 size; 357 358 if (!ring) 359 return; 360 361 size = XGENE_ENET_DESC_SIZE * XGENE_ENET_NUM_DESC; 362 if (ring->desc_addr) 363 dma_free_coherent(dev, size, ring->desc_addr, ring->dma_addr); 364 365 kfree(ring->pkt_info); 366 kfree(ring); 367 } 368 369 static void xge_free_buffers(struct net_device *ndev) 370 { 371 struct xge_pdata *pdata = netdev_priv(ndev); 372 struct xge_desc_ring *ring = pdata->rx_ring; 373 struct device *dev = &pdata->pdev->dev; 374 struct sk_buff *skb; 375 dma_addr_t dma_addr; 376 int i; 377 378 for (i = 0; i < XGENE_ENET_NUM_DESC; i++) { 379 skb = ring->pkt_info[i].skb; 380 dma_addr = ring->pkt_info[i].dma_addr; 381 382 if (!skb) 383 continue; 384 385 dma_unmap_single(dev, dma_addr, XGENE_ENET_STD_MTU, 386 DMA_FROM_DEVICE); 387 dev_kfree_skb_any(skb); 388 } 389 } 390 391 static void xge_delete_desc_rings(struct net_device *ndev) 392 { 393 struct xge_pdata *pdata = netdev_priv(ndev); 394 395 xge_txc_poll(ndev); 396 xge_delete_desc_ring(ndev, pdata->tx_ring); 397 398 xge_rx_poll(ndev, 64); 399 xge_free_buffers(ndev); 400 xge_delete_desc_ring(ndev, pdata->rx_ring); 401 } 402 403 static struct xge_desc_ring *xge_create_desc_ring(struct net_device *ndev) 404 { 405 struct xge_pdata *pdata = netdev_priv(ndev); 406 struct device *dev = &pdata->pdev->dev; 407 struct xge_desc_ring *ring; 408 u16 size; 409 410 ring = kzalloc(sizeof(*ring), GFP_KERNEL); 411 if (!ring) 412 return NULL; 413 414 ring->ndev = ndev; 415 416 size = XGENE_ENET_DESC_SIZE * XGENE_ENET_NUM_DESC; 417 ring->desc_addr = dma_alloc_coherent(dev, size, &ring->dma_addr, 418 GFP_KERNEL); 419 if (!ring->desc_addr) 420 goto err; 421 422 ring->pkt_info = kcalloc(XGENE_ENET_NUM_DESC, sizeof(*ring->pkt_info), 423 GFP_KERNEL); 424 if (!ring->pkt_info) 425 goto err; 426 427 xge_setup_desc(ring); 428 429 return ring; 430 431 err: 432 xge_delete_desc_ring(ndev, ring); 433 434 return NULL; 435 } 436 437 static int xge_create_desc_rings(struct net_device *ndev) 438 { 439 struct xge_pdata *pdata = netdev_priv(ndev); 440 struct xge_desc_ring *ring; 441 int ret; 442 443 /* create tx ring */ 444 ring = xge_create_desc_ring(ndev); 445 if (!ring) 446 goto err; 447 448 pdata->tx_ring = ring; 449 xge_update_tx_desc_addr(pdata); 450 451 /* create rx ring */ 452 ring = xge_create_desc_ring(ndev); 453 if (!ring) 454 goto err; 455 456 pdata->rx_ring = ring; 457 xge_update_rx_desc_addr(pdata); 458 459 ret = xge_refill_buffers(ndev, XGENE_ENET_NUM_DESC); 460 if (ret) 461 goto err; 462 463 return 0; 464 err: 465 xge_delete_desc_rings(ndev); 466 467 return -ENOMEM; 468 } 469 470 static int xge_open(struct net_device *ndev) 471 { 472 struct xge_pdata *pdata = netdev_priv(ndev); 473 int ret; 474 475 ret = xge_create_desc_rings(ndev); 476 if (ret) 477 return ret; 478 479 napi_enable(&pdata->napi); 480 ret = xge_request_irq(ndev); 481 if (ret) 482 return ret; 483 484 xge_intr_enable(pdata); 485 xge_wr_csr(pdata, DMARXCTRL, 1); 486 487 phy_start(ndev->phydev); 488 xge_mac_enable(pdata); 489 netif_start_queue(ndev); 490 491 return 0; 492 } 493 494 static int xge_close(struct net_device *ndev) 495 { 496 struct xge_pdata *pdata = netdev_priv(ndev); 497 498 netif_stop_queue(ndev); 499 xge_mac_disable(pdata); 500 phy_stop(ndev->phydev); 501 502 xge_intr_disable(pdata); 503 xge_free_irq(ndev); 504 napi_disable(&pdata->napi); 505 xge_delete_desc_rings(ndev); 506 507 return 0; 508 } 509 510 static int xge_napi(struct napi_struct *napi, const int budget) 511 { 512 struct net_device *ndev = napi->dev; 513 struct xge_pdata *pdata; 514 int processed; 515 516 pdata = netdev_priv(ndev); 517 518 xge_txc_poll(ndev); 519 processed = xge_rx_poll(ndev, budget); 520 521 if (processed < budget) { 522 napi_complete_done(napi, processed); 523 xge_intr_enable(pdata); 524 } 525 526 return processed; 527 } 528 529 static int xge_set_mac_addr(struct net_device *ndev, void *addr) 530 { 531 struct xge_pdata *pdata = netdev_priv(ndev); 532 int ret; 533 534 ret = eth_mac_addr(ndev, addr); 535 if (ret) 536 return ret; 537 538 xge_mac_set_station_addr(pdata); 539 540 return 0; 541 } 542 543 static bool is_tx_pending(struct xge_raw_desc *raw_desc) 544 { 545 if (!GET_BITS(E, le64_to_cpu(raw_desc->m0))) 546 return true; 547 548 return false; 549 } 550 551 static void xge_free_pending_skb(struct net_device *ndev) 552 { 553 struct xge_pdata *pdata = netdev_priv(ndev); 554 struct device *dev = &pdata->pdev->dev; 555 struct xge_desc_ring *tx_ring; 556 struct xge_raw_desc *raw_desc; 557 dma_addr_t dma_addr; 558 struct sk_buff *skb; 559 void *pkt_buf; 560 int i; 561 562 tx_ring = pdata->tx_ring; 563 564 for (i = 0; i < XGENE_ENET_NUM_DESC; i++) { 565 raw_desc = &tx_ring->raw_desc[i]; 566 567 if (!is_tx_pending(raw_desc)) 568 continue; 569 570 skb = tx_ring->pkt_info[i].skb; 571 dma_addr = tx_ring->pkt_info[i].dma_addr; 572 pkt_buf = tx_ring->pkt_info[i].pkt_buf; 573 dma_free_coherent(dev, XGENE_ENET_STD_MTU, pkt_buf, dma_addr); 574 dev_kfree_skb_any(skb); 575 } 576 } 577 578 static void xge_timeout(struct net_device *ndev, unsigned int txqueue) 579 { 580 struct xge_pdata *pdata = netdev_priv(ndev); 581 582 rtnl_lock(); 583 584 if (!netif_running(ndev)) 585 goto out; 586 587 netif_stop_queue(ndev); 588 xge_intr_disable(pdata); 589 napi_disable(&pdata->napi); 590 591 xge_wr_csr(pdata, DMATXCTRL, 0); 592 xge_txc_poll(ndev); 593 xge_free_pending_skb(ndev); 594 xge_wr_csr(pdata, DMATXSTATUS, ~0U); 595 596 xge_setup_desc(pdata->tx_ring); 597 xge_update_tx_desc_addr(pdata); 598 xge_mac_init(pdata); 599 600 napi_enable(&pdata->napi); 601 xge_intr_enable(pdata); 602 xge_mac_enable(pdata); 603 netif_start_queue(ndev); 604 605 out: 606 rtnl_unlock(); 607 } 608 609 static void xge_get_stats64(struct net_device *ndev, 610 struct rtnl_link_stats64 *storage) 611 { 612 struct xge_pdata *pdata = netdev_priv(ndev); 613 struct xge_stats *stats = &pdata->stats; 614 615 storage->tx_packets += stats->tx_packets; 616 storage->tx_bytes += stats->tx_bytes; 617 618 storage->rx_packets += stats->rx_packets; 619 storage->rx_bytes += stats->rx_bytes; 620 storage->rx_errors += stats->rx_errors; 621 } 622 623 static const struct net_device_ops xgene_ndev_ops = { 624 .ndo_open = xge_open, 625 .ndo_stop = xge_close, 626 .ndo_start_xmit = xge_start_xmit, 627 .ndo_set_mac_address = xge_set_mac_addr, 628 .ndo_tx_timeout = xge_timeout, 629 .ndo_get_stats64 = xge_get_stats64, 630 }; 631 632 static int xge_probe(struct platform_device *pdev) 633 { 634 struct device *dev = &pdev->dev; 635 struct net_device *ndev; 636 struct xge_pdata *pdata; 637 int ret; 638 639 ndev = alloc_etherdev(sizeof(*pdata)); 640 if (!ndev) 641 return -ENOMEM; 642 643 pdata = netdev_priv(ndev); 644 645 pdata->pdev = pdev; 646 pdata->ndev = ndev; 647 SET_NETDEV_DEV(ndev, dev); 648 platform_set_drvdata(pdev, pdata); 649 ndev->netdev_ops = &xgene_ndev_ops; 650 651 ndev->features |= NETIF_F_GSO | 652 NETIF_F_GRO; 653 654 ret = xge_get_resources(pdata); 655 if (ret) 656 goto err; 657 658 ndev->hw_features = ndev->features; 659 xge_set_ethtool_ops(ndev); 660 661 ret = dma_coerce_mask_and_coherent(dev, DMA_BIT_MASK(64)); 662 if (ret) { 663 netdev_err(ndev, "No usable DMA configuration\n"); 664 goto err; 665 } 666 667 ret = xge_init_hw(ndev); 668 if (ret) 669 goto err; 670 671 ret = xge_mdio_config(ndev); 672 if (ret) 673 goto err; 674 675 netif_napi_add(ndev, &pdata->napi, xge_napi); 676 677 ret = register_netdev(ndev); 678 if (ret) { 679 netdev_err(ndev, "Failed to register netdev\n"); 680 goto err_mdio_remove; 681 } 682 683 return 0; 684 685 err_mdio_remove: 686 xge_mdio_remove(ndev); 687 err: 688 free_netdev(ndev); 689 690 return ret; 691 } 692 693 static void xge_remove(struct platform_device *pdev) 694 { 695 struct xge_pdata *pdata; 696 struct net_device *ndev; 697 698 pdata = platform_get_drvdata(pdev); 699 ndev = pdata->ndev; 700 701 rtnl_lock(); 702 if (netif_running(ndev)) 703 dev_close(ndev); 704 rtnl_unlock(); 705 706 xge_mdio_remove(ndev); 707 unregister_netdev(ndev); 708 free_netdev(ndev); 709 } 710 711 static void xge_shutdown(struct platform_device *pdev) 712 { 713 struct xge_pdata *pdata; 714 715 pdata = platform_get_drvdata(pdev); 716 if (!pdata) 717 return; 718 719 if (!pdata->ndev) 720 return; 721 722 xge_remove(pdev); 723 } 724 725 static const struct acpi_device_id xge_acpi_match[] = { 726 { "APMC0D80" }, 727 { } 728 }; 729 MODULE_DEVICE_TABLE(acpi, xge_acpi_match); 730 731 static struct platform_driver xge_driver = { 732 .driver = { 733 .name = "xgene-enet-v2", 734 .acpi_match_table = ACPI_PTR(xge_acpi_match), 735 }, 736 .probe = xge_probe, 737 .remove = xge_remove, 738 .shutdown = xge_shutdown, 739 }; 740 module_platform_driver(xge_driver); 741 742 MODULE_DESCRIPTION("APM X-Gene SoC Ethernet v2 driver"); 743 MODULE_AUTHOR("Iyappan Subramanian <isubramanian@apm.com>"); 744 MODULE_LICENSE("GPL"); 745