1/******************************************************************************* 2 3 Intel(R) 82576 Virtual Function Linux driver 4 Copyright(c) 2009 - 2012 Intel Corporation. 5 6 This program is free software; you can redistribute it and/or modify it 7 under the terms and conditions of the GNU General Public License, 8 version 2, as published by the Free Software Foundation. 9 10 This program is distributed in the hope it will be useful, but WITHOUT 11 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 12 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 13 more details. 14 15 You should have received a copy of the GNU General Public License along with 16 this program; if not, write to the Free Software Foundation, Inc., 17 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. 18 19 The full GNU General Public License is included in this distribution in 20 the file called "COPYING". 21 22 Contact Information: 23 e1000-devel Mailing List <e1000-devel@lists.sourceforge.net> 24 Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 25 26*******************************************************************************/ 27 28#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 29 30#include <linux/module.h> 31#include <linux/types.h> 32#include <linux/init.h> 33#include <linux/pci.h> 34#include <linux/vmalloc.h> 35#include <linux/pagemap.h> 36#include <linux/delay.h> 37#include <linux/netdevice.h> 38#include <linux/tcp.h> 39#include <linux/ipv6.h> 40#include <linux/slab.h> 41#include <net/checksum.h> 42#include <net/ip6_checksum.h> 43#include <linux/mii.h> 44#include <linux/ethtool.h> 45#include <linux/if_vlan.h> 46#include <linux/prefetch.h> 47 48#include "igbvf.h" 49 50#define DRV_VERSION "2.0.1-k" 51char igbvf_driver_name[] = "igbvf"; 52const char igbvf_driver_version[] = DRV_VERSION; 53static const char igbvf_driver_string[] = 54 "Intel(R) Gigabit Virtual Function Network Driver"; 55static const char igbvf_copyright[] = 56 "Copyright (c) 2009 - 2012 Intel Corporation."; 57 58static int igbvf_poll(struct napi_struct *napi, int budget); 59static void igbvf_reset(struct igbvf_adapter *); 60static void igbvf_set_interrupt_capability(struct igbvf_adapter *); 61static void igbvf_reset_interrupt_capability(struct igbvf_adapter *); 62 63static struct igbvf_info igbvf_vf_info = { 64 .mac = e1000_vfadapt, 65 .flags = 0, 66 .pba = 10, 67 .init_ops = e1000_init_function_pointers_vf, 68}; 69 70static struct igbvf_info igbvf_i350_vf_info = { 71 .mac = e1000_vfadapt_i350, 72 .flags = 0, 73 .pba = 10, 74 .init_ops = e1000_init_function_pointers_vf, 75}; 76 77static const struct igbvf_info *igbvf_info_tbl[] = { 78 [board_vf] = &igbvf_vf_info, 79 [board_i350_vf] = &igbvf_i350_vf_info, 80}; 81 82/** 83 * igbvf_desc_unused - calculate if we have unused descriptors 84 **/ 85static int igbvf_desc_unused(struct igbvf_ring *ring) 86{ 87 if (ring->next_to_clean > ring->next_to_use) 88 return ring->next_to_clean - ring->next_to_use - 1; 89 90 return ring->count + ring->next_to_clean - ring->next_to_use - 1; 91} 92 93/** 94 * igbvf_receive_skb - helper function to handle Rx indications 95 * @adapter: board private structure 96 * @status: descriptor status field as written by hardware 97 * @vlan: descriptor vlan field as written by hardware (no le/be conversion) 98 * @skb: pointer to sk_buff to be indicated to stack 99 **/ 100static void igbvf_receive_skb(struct igbvf_adapter *adapter, 101 struct net_device *netdev, 102 struct sk_buff *skb, 103 u32 status, u16 vlan) 104{ 105 if (status & E1000_RXD_STAT_VP) { 106 u16 vid = le16_to_cpu(vlan) & E1000_RXD_SPC_VLAN_MASK; 107 if (test_bit(vid, adapter->active_vlans)) 108 __vlan_hwaccel_put_tag(skb, vid); 109 } 110 netif_receive_skb(skb); 111} 112 113static inline void igbvf_rx_checksum_adv(struct igbvf_adapter *adapter, 114 u32 status_err, struct sk_buff *skb) 115{ 116 skb_checksum_none_assert(skb); 117 118 /* Ignore Checksum bit is set or checksum is disabled through ethtool */ 119 if ((status_err & E1000_RXD_STAT_IXSM) || 120 (adapter->flags & IGBVF_FLAG_RX_CSUM_DISABLED)) 121 return; 122 123 /* TCP/UDP checksum error bit is set */ 124 if (status_err & 125 (E1000_RXDEXT_STATERR_TCPE | E1000_RXDEXT_STATERR_IPE)) { 126 /* let the stack verify checksum errors */ 127 adapter->hw_csum_err++; 128 return; 129 } 130 131 /* It must be a TCP or UDP packet with a valid checksum */ 132 if (status_err & (E1000_RXD_STAT_TCPCS | E1000_RXD_STAT_UDPCS)) 133 skb->ip_summed = CHECKSUM_UNNECESSARY; 134 135 adapter->hw_csum_good++; 136} 137 138/** 139 * igbvf_alloc_rx_buffers - Replace used receive buffers; packet split 140 * @rx_ring: address of ring structure to repopulate 141 * @cleaned_count: number of buffers to repopulate 142 **/ 143static void igbvf_alloc_rx_buffers(struct igbvf_ring *rx_ring, 144 int cleaned_count) 145{ 146 struct igbvf_adapter *adapter = rx_ring->adapter; 147 struct net_device *netdev = adapter->netdev; 148 struct pci_dev *pdev = adapter->pdev; 149 union e1000_adv_rx_desc *rx_desc; 150 struct igbvf_buffer *buffer_info; 151 struct sk_buff *skb; 152 unsigned int i; 153 int bufsz; 154 155 i = rx_ring->next_to_use; 156 buffer_info = &rx_ring->buffer_info[i]; 157 158 if (adapter->rx_ps_hdr_size) 159 bufsz = adapter->rx_ps_hdr_size; 160 else 161 bufsz = adapter->rx_buffer_len; 162 163 while (cleaned_count--) { 164 rx_desc = IGBVF_RX_DESC_ADV(*rx_ring, i); 165 166 if (adapter->rx_ps_hdr_size && !buffer_info->page_dma) { 167 if (!buffer_info->page) { 168 buffer_info->page = alloc_page(GFP_ATOMIC); 169 if (!buffer_info->page) { 170 adapter->alloc_rx_buff_failed++; 171 goto no_buffers; 172 } 173 buffer_info->page_offset = 0; 174 } else { 175 buffer_info->page_offset ^= PAGE_SIZE / 2; 176 } 177 buffer_info->page_dma = 178 dma_map_page(&pdev->dev, buffer_info->page, 179 buffer_info->page_offset, 180 PAGE_SIZE / 2, 181 DMA_FROM_DEVICE); 182 } 183 184 if (!buffer_info->skb) { 185 skb = netdev_alloc_skb_ip_align(netdev, bufsz); 186 if (!skb) { 187 adapter->alloc_rx_buff_failed++; 188 goto no_buffers; 189 } 190 191 buffer_info->skb = skb; 192 buffer_info->dma = dma_map_single(&pdev->dev, skb->data, 193 bufsz, 194 DMA_FROM_DEVICE); 195 } 196 /* Refresh the desc even if buffer_addrs didn't change because 197 * each write-back erases this info. */ 198 if (adapter->rx_ps_hdr_size) { 199 rx_desc->read.pkt_addr = 200 cpu_to_le64(buffer_info->page_dma); 201 rx_desc->read.hdr_addr = cpu_to_le64(buffer_info->dma); 202 } else { 203 rx_desc->read.pkt_addr = 204 cpu_to_le64(buffer_info->dma); 205 rx_desc->read.hdr_addr = 0; 206 } 207 208 i++; 209 if (i == rx_ring->count) 210 i = 0; 211 buffer_info = &rx_ring->buffer_info[i]; 212 } 213 214no_buffers: 215 if (rx_ring->next_to_use != i) { 216 rx_ring->next_to_use = i; 217 if (i == 0) 218 i = (rx_ring->count - 1); 219 else 220 i--; 221 222 /* Force memory writes to complete before letting h/w 223 * know there are new descriptors to fetch. (Only 224 * applicable for weak-ordered memory model archs, 225 * such as IA-64). */ 226 wmb(); 227 writel(i, adapter->hw.hw_addr + rx_ring->tail); 228 } 229} 230 231/** 232 * igbvf_clean_rx_irq - Send received data up the network stack; legacy 233 * @adapter: board private structure 234 * 235 * the return value indicates whether actual cleaning was done, there 236 * is no guarantee that everything was cleaned 237 **/ 238static bool igbvf_clean_rx_irq(struct igbvf_adapter *adapter, 239 int *work_done, int work_to_do) 240{ 241 struct igbvf_ring *rx_ring = adapter->rx_ring; 242 struct net_device *netdev = adapter->netdev; 243 struct pci_dev *pdev = adapter->pdev; 244 union e1000_adv_rx_desc *rx_desc, *next_rxd; 245 struct igbvf_buffer *buffer_info, *next_buffer; 246 struct sk_buff *skb; 247 bool cleaned = false; 248 int cleaned_count = 0; 249 unsigned int total_bytes = 0, total_packets = 0; 250 unsigned int i; 251 u32 length, hlen, staterr; 252 253 i = rx_ring->next_to_clean; 254 rx_desc = IGBVF_RX_DESC_ADV(*rx_ring, i); 255 staterr = le32_to_cpu(rx_desc->wb.upper.status_error); 256 257 while (staterr & E1000_RXD_STAT_DD) { 258 if (*work_done >= work_to_do) 259 break; 260 (*work_done)++; 261 rmb(); /* read descriptor and rx_buffer_info after status DD */ 262 263 buffer_info = &rx_ring->buffer_info[i]; 264 265 /* HW will not DMA in data larger than the given buffer, even 266 * if it parses the (NFS, of course) header to be larger. In 267 * that case, it fills the header buffer and spills the rest 268 * into the page. 269 */ 270 hlen = (le16_to_cpu(rx_desc->wb.lower.lo_dword.hs_rss.hdr_info) & 271 E1000_RXDADV_HDRBUFLEN_MASK) >> E1000_RXDADV_HDRBUFLEN_SHIFT; 272 if (hlen > adapter->rx_ps_hdr_size) 273 hlen = adapter->rx_ps_hdr_size; 274 275 length = le16_to_cpu(rx_desc->wb.upper.length); 276 cleaned = true; 277 cleaned_count++; 278 279 skb = buffer_info->skb; 280 prefetch(skb->data - NET_IP_ALIGN); 281 buffer_info->skb = NULL; 282 if (!adapter->rx_ps_hdr_size) { 283 dma_unmap_single(&pdev->dev, buffer_info->dma, 284 adapter->rx_buffer_len, 285 DMA_FROM_DEVICE); 286 buffer_info->dma = 0; 287 skb_put(skb, length); 288 goto send_up; 289 } 290 291 if (!skb_shinfo(skb)->nr_frags) { 292 dma_unmap_single(&pdev->dev, buffer_info->dma, 293 adapter->rx_ps_hdr_size, 294 DMA_FROM_DEVICE); 295 skb_put(skb, hlen); 296 } 297 298 if (length) { 299 dma_unmap_page(&pdev->dev, buffer_info->page_dma, 300 PAGE_SIZE / 2, 301 DMA_FROM_DEVICE); 302 buffer_info->page_dma = 0; 303 304 skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags, 305 buffer_info->page, 306 buffer_info->page_offset, 307 length); 308 309 if ((adapter->rx_buffer_len > (PAGE_SIZE / 2)) || 310 (page_count(buffer_info->page) != 1)) 311 buffer_info->page = NULL; 312 else 313 get_page(buffer_info->page); 314 315 skb->len += length; 316 skb->data_len += length; 317 skb->truesize += PAGE_SIZE / 2; 318 } 319send_up: 320 i++; 321 if (i == rx_ring->count) 322 i = 0; 323 next_rxd = IGBVF_RX_DESC_ADV(*rx_ring, i); 324 prefetch(next_rxd); 325 next_buffer = &rx_ring->buffer_info[i]; 326 327 if (!(staterr & E1000_RXD_STAT_EOP)) { 328 buffer_info->skb = next_buffer->skb; 329 buffer_info->dma = next_buffer->dma; 330 next_buffer->skb = skb; 331 next_buffer->dma = 0; 332 goto next_desc; 333 } 334 335 if (staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK) { 336 dev_kfree_skb_irq(skb); 337 goto next_desc; 338 } 339 340 total_bytes += skb->len; 341 total_packets++; 342 343 igbvf_rx_checksum_adv(adapter, staterr, skb); 344 345 skb->protocol = eth_type_trans(skb, netdev); 346 347 igbvf_receive_skb(adapter, netdev, skb, staterr, 348 rx_desc->wb.upper.vlan); 349 350next_desc: 351 rx_desc->wb.upper.status_error = 0; 352 353 /* return some buffers to hardware, one at a time is too slow */ 354 if (cleaned_count >= IGBVF_RX_BUFFER_WRITE) { 355 igbvf_alloc_rx_buffers(rx_ring, cleaned_count); 356 cleaned_count = 0; 357 } 358 359 /* use prefetched values */ 360 rx_desc = next_rxd; 361 buffer_info = next_buffer; 362 363 staterr = le32_to_cpu(rx_desc->wb.upper.status_error); 364 } 365 366 rx_ring->next_to_clean = i; 367 cleaned_count = igbvf_desc_unused(rx_ring); 368 369 if (cleaned_count) 370 igbvf_alloc_rx_buffers(rx_ring, cleaned_count); 371 372 adapter->total_rx_packets += total_packets; 373 adapter->total_rx_bytes += total_bytes; 374 adapter->net_stats.rx_bytes += total_bytes; 375 adapter->net_stats.rx_packets += total_packets; 376 return cleaned; 377} 378 379static void igbvf_put_txbuf(struct igbvf_adapter *adapter, 380 struct igbvf_buffer *buffer_info) 381{ 382 if (buffer_info->dma) { 383 if (buffer_info->mapped_as_page) 384 dma_unmap_page(&adapter->pdev->dev, 385 buffer_info->dma, 386 buffer_info->length, 387 DMA_TO_DEVICE); 388 else 389 dma_unmap_single(&adapter->pdev->dev, 390 buffer_info->dma, 391 buffer_info->length, 392 DMA_TO_DEVICE); 393 buffer_info->dma = 0; 394 } 395 if (buffer_info->skb) { 396 dev_kfree_skb_any(buffer_info->skb); 397 buffer_info->skb = NULL; 398 } 399 buffer_info->time_stamp = 0; 400} 401 402/** 403 * igbvf_setup_tx_resources - allocate Tx resources (Descriptors) 404 * @adapter: board private structure 405 * 406 * Return 0 on success, negative on failure 407 **/ 408int igbvf_setup_tx_resources(struct igbvf_adapter *adapter, 409 struct igbvf_ring *tx_ring) 410{ 411 struct pci_dev *pdev = adapter->pdev; 412 int size; 413 414 size = sizeof(struct igbvf_buffer) * tx_ring->count; 415 tx_ring->buffer_info = vzalloc(size); 416 if (!tx_ring->buffer_info) 417 goto err; 418 419 /* round up to nearest 4K */ 420 tx_ring->size = tx_ring->count * sizeof(union e1000_adv_tx_desc); 421 tx_ring->size = ALIGN(tx_ring->size, 4096); 422 423 tx_ring->desc = dma_alloc_coherent(&pdev->dev, tx_ring->size, 424 &tx_ring->dma, GFP_KERNEL); 425 426 if (!tx_ring->desc) 427 goto err; 428 429 tx_ring->adapter = adapter; 430 tx_ring->next_to_use = 0; 431 tx_ring->next_to_clean = 0; 432 433 return 0; 434err: 435 vfree(tx_ring->buffer_info); 436 dev_err(&adapter->pdev->dev, 437 "Unable to allocate memory for the transmit descriptor ring\n"); 438 return -ENOMEM; 439} 440 441/** 442 * igbvf_setup_rx_resources - allocate Rx resources (Descriptors) 443 * @adapter: board private structure 444 * 445 * Returns 0 on success, negative on failure 446 **/ 447int igbvf_setup_rx_resources(struct igbvf_adapter *adapter, 448 struct igbvf_ring *rx_ring) 449{ 450 struct pci_dev *pdev = adapter->pdev; 451 int size, desc_len; 452 453 size = sizeof(struct igbvf_buffer) * rx_ring->count; 454 rx_ring->buffer_info = vzalloc(size); 455 if (!rx_ring->buffer_info) 456 goto err; 457 458 desc_len = sizeof(union e1000_adv_rx_desc); 459 460 /* Round up to nearest 4K */ 461 rx_ring->size = rx_ring->count * desc_len; 462 rx_ring->size = ALIGN(rx_ring->size, 4096); 463 464 rx_ring->desc = dma_alloc_coherent(&pdev->dev, rx_ring->size, 465 &rx_ring->dma, GFP_KERNEL); 466 467 if (!rx_ring->desc) 468 goto err; 469 470 rx_ring->next_to_clean = 0; 471 rx_ring->next_to_use = 0; 472 473 rx_ring->adapter = adapter; 474 475 return 0; 476 477err: 478 vfree(rx_ring->buffer_info); 479 rx_ring->buffer_info = NULL; 480 dev_err(&adapter->pdev->dev, 481 "Unable to allocate memory for the receive descriptor ring\n"); 482 return -ENOMEM; 483} 484 485/** 486 * igbvf_clean_tx_ring - Free Tx Buffers 487 * @tx_ring: ring to be cleaned 488 **/ 489static void igbvf_clean_tx_ring(struct igbvf_ring *tx_ring) 490{ 491 struct igbvf_adapter *adapter = tx_ring->adapter; 492 struct igbvf_buffer *buffer_info; 493 unsigned long size; 494 unsigned int i; 495 496 if (!tx_ring->buffer_info) 497 return; 498 499 /* Free all the Tx ring sk_buffs */ 500 for (i = 0; i < tx_ring->count; i++) { 501 buffer_info = &tx_ring->buffer_info[i]; 502 igbvf_put_txbuf(adapter, buffer_info); 503 } 504 505 size = sizeof(struct igbvf_buffer) * tx_ring->count; 506 memset(tx_ring->buffer_info, 0, size); 507 508 /* Zero out the descriptor ring */ 509 memset(tx_ring->desc, 0, tx_ring->size); 510 511 tx_ring->next_to_use = 0; 512 tx_ring->next_to_clean = 0; 513 514 writel(0, adapter->hw.hw_addr + tx_ring->head); 515 writel(0, adapter->hw.hw_addr + tx_ring->tail); 516} 517 518/** 519 * igbvf_free_tx_resources - Free Tx Resources per Queue 520 * @tx_ring: ring to free resources from 521 * 522 * Free all transmit software resources 523 **/ 524void igbvf_free_tx_resources(struct igbvf_ring *tx_ring) 525{ 526 struct pci_dev *pdev = tx_ring->adapter->pdev; 527 528 igbvf_clean_tx_ring(tx_ring); 529 530 vfree(tx_ring->buffer_info); 531 tx_ring->buffer_info = NULL; 532 533 dma_free_coherent(&pdev->dev, tx_ring->size, tx_ring->desc, 534 tx_ring->dma); 535 536 tx_ring->desc = NULL; 537} 538 539/** 540 * igbvf_clean_rx_ring - Free Rx Buffers per Queue 541 * @adapter: board private structure 542 **/ 543static void igbvf_clean_rx_ring(struct igbvf_ring *rx_ring) 544{ 545 struct igbvf_adapter *adapter = rx_ring->adapter; 546 struct igbvf_buffer *buffer_info; 547 struct pci_dev *pdev = adapter->pdev; 548 unsigned long size; 549 unsigned int i; 550 551 if (!rx_ring->buffer_info) 552 return; 553 554 /* Free all the Rx ring sk_buffs */ 555 for (i = 0; i < rx_ring->count; i++) { 556 buffer_info = &rx_ring->buffer_info[i]; 557 if (buffer_info->dma) { 558 if (adapter->rx_ps_hdr_size){ 559 dma_unmap_single(&pdev->dev, buffer_info->dma, 560 adapter->rx_ps_hdr_size, 561 DMA_FROM_DEVICE); 562 } else { 563 dma_unmap_single(&pdev->dev, buffer_info->dma, 564 adapter->rx_buffer_len, 565 DMA_FROM_DEVICE); 566 } 567 buffer_info->dma = 0; 568 } 569 570 if (buffer_info->skb) { 571 dev_kfree_skb(buffer_info->skb); 572 buffer_info->skb = NULL; 573 } 574 575 if (buffer_info->page) { 576 if (buffer_info->page_dma) 577 dma_unmap_page(&pdev->dev, 578 buffer_info->page_dma, 579 PAGE_SIZE / 2, 580 DMA_FROM_DEVICE); 581 put_page(buffer_info->page); 582 buffer_info->page = NULL; 583 buffer_info->page_dma = 0; 584 buffer_info->page_offset = 0; 585 } 586 } 587 588 size = sizeof(struct igbvf_buffer) * rx_ring->count; 589 memset(rx_ring->buffer_info, 0, size); 590 591 /* Zero out the descriptor ring */ 592 memset(rx_ring->desc, 0, rx_ring->size); 593 594 rx_ring->next_to_clean = 0; 595 rx_ring->next_to_use = 0; 596 597 writel(0, adapter->hw.hw_addr + rx_ring->head); 598 writel(0, adapter->hw.hw_addr + rx_ring->tail); 599} 600 601/** 602 * igbvf_free_rx_resources - Free Rx Resources 603 * @rx_ring: ring to clean the resources from 604 * 605 * Free all receive software resources 606 **/ 607 608void igbvf_free_rx_resources(struct igbvf_ring *rx_ring) 609{ 610 struct pci_dev *pdev = rx_ring->adapter->pdev; 611 612 igbvf_clean_rx_ring(rx_ring); 613 614 vfree(rx_ring->buffer_info); 615 rx_ring->buffer_info = NULL; 616 617 dma_free_coherent(&pdev->dev, rx_ring->size, rx_ring->desc, 618 rx_ring->dma); 619 rx_ring->desc = NULL; 620} 621 622/** 623 * igbvf_update_itr - update the dynamic ITR value based on statistics 624 * @adapter: pointer to adapter 625 * @itr_setting: current adapter->itr 626 * @packets: the number of packets during this measurement interval 627 * @bytes: the number of bytes during this measurement interval 628 * 629 * Stores a new ITR value based on packets and byte 630 * counts during the last interrupt. The advantage of per interrupt 631 * computation is faster updates and more accurate ITR for the current 632 * traffic pattern. Constants in this function were computed 633 * based on theoretical maximum wire speed and thresholds were set based 634 * on testing data as well as attempting to minimize response time 635 * while increasing bulk throughput. This functionality is controlled 636 * by the InterruptThrottleRate module parameter. 637 **/ 638static unsigned int igbvf_update_itr(struct igbvf_adapter *adapter, 639 u16 itr_setting, int packets, 640 int bytes) 641{ 642 unsigned int retval = itr_setting; 643 644 if (packets == 0) 645 goto update_itr_done; 646 647 switch (itr_setting) { 648 case lowest_latency: 649 /* handle TSO and jumbo frames */ 650 if (bytes/packets > 8000) 651 retval = bulk_latency; 652 else if ((packets < 5) && (bytes > 512)) 653 retval = low_latency; 654 break; 655 case low_latency: /* 50 usec aka 20000 ints/s */ 656 if (bytes > 10000) { 657 /* this if handles the TSO accounting */ 658 if (bytes/packets > 8000) 659 retval = bulk_latency; 660 else if ((packets < 10) || ((bytes/packets) > 1200)) 661 retval = bulk_latency; 662 else if ((packets > 35)) 663 retval = lowest_latency; 664 } else if (bytes/packets > 2000) { 665 retval = bulk_latency; 666 } else if (packets <= 2 && bytes < 512) { 667 retval = lowest_latency; 668 } 669 break; 670 case bulk_latency: /* 250 usec aka 4000 ints/s */ 671 if (bytes > 25000) { 672 if (packets > 35) 673 retval = low_latency; 674 } else if (bytes < 6000) { 675 retval = low_latency; 676 } 677 break; 678 } 679 680update_itr_done: 681 return retval; 682} 683 684static void igbvf_set_itr(struct igbvf_adapter *adapter) 685{ 686 struct e1000_hw *hw = &adapter->hw; 687 u16 current_itr; 688 u32 new_itr = adapter->itr; 689 690 adapter->tx_itr = igbvf_update_itr(adapter, adapter->tx_itr, 691 adapter->total_tx_packets, 692 adapter->total_tx_bytes); 693 /* conservative mode (itr 3) eliminates the lowest_latency setting */ 694 if (adapter->itr_setting == 3 && adapter->tx_itr == lowest_latency) 695 adapter->tx_itr = low_latency; 696 697 adapter->rx_itr = igbvf_update_itr(adapter, adapter->rx_itr, 698 adapter->total_rx_packets, 699 adapter->total_rx_bytes); 700 /* conservative mode (itr 3) eliminates the lowest_latency setting */ 701 if (adapter->itr_setting == 3 && adapter->rx_itr == lowest_latency) 702 adapter->rx_itr = low_latency; 703 704 current_itr = max(adapter->rx_itr, adapter->tx_itr); 705 706 switch (current_itr) { 707 /* counts and packets in update_itr are dependent on these numbers */ 708 case lowest_latency: 709 new_itr = 70000; 710 break; 711 case low_latency: 712 new_itr = 20000; /* aka hwitr = ~200 */ 713 break; 714 case bulk_latency: 715 new_itr = 4000; 716 break; 717 default: 718 break; 719 } 720 721 if (new_itr != adapter->itr) { 722 /* 723 * this attempts to bias the interrupt rate towards Bulk 724 * by adding intermediate steps when interrupt rate is 725 * increasing 726 */ 727 new_itr = new_itr > adapter->itr ? 728 min(adapter->itr + (new_itr >> 2), new_itr) : 729 new_itr; 730 adapter->itr = new_itr; 731 adapter->rx_ring->itr_val = 1952; 732 733 if (adapter->msix_entries) 734 adapter->rx_ring->set_itr = 1; 735 else 736 ew32(ITR, 1952); 737 } 738} 739 740/** 741 * igbvf_clean_tx_irq - Reclaim resources after transmit completes 742 * @adapter: board private structure 743 * returns true if ring is completely cleaned 744 **/ 745static bool igbvf_clean_tx_irq(struct igbvf_ring *tx_ring) 746{ 747 struct igbvf_adapter *adapter = tx_ring->adapter; 748 struct net_device *netdev = adapter->netdev; 749 struct igbvf_buffer *buffer_info; 750 struct sk_buff *skb; 751 union e1000_adv_tx_desc *tx_desc, *eop_desc; 752 unsigned int total_bytes = 0, total_packets = 0; 753 unsigned int i, eop, count = 0; 754 bool cleaned = false; 755 756 i = tx_ring->next_to_clean; 757 eop = tx_ring->buffer_info[i].next_to_watch; 758 eop_desc = IGBVF_TX_DESC_ADV(*tx_ring, eop); 759 760 while ((eop_desc->wb.status & cpu_to_le32(E1000_TXD_STAT_DD)) && 761 (count < tx_ring->count)) { 762 rmb(); /* read buffer_info after eop_desc status */ 763 for (cleaned = false; !cleaned; count++) { 764 tx_desc = IGBVF_TX_DESC_ADV(*tx_ring, i); 765 buffer_info = &tx_ring->buffer_info[i]; 766 cleaned = (i == eop); 767 skb = buffer_info->skb; 768 769 if (skb) { 770 unsigned int segs, bytecount; 771 772 /* gso_segs is currently only valid for tcp */ 773 segs = skb_shinfo(skb)->gso_segs ?: 1; 774 /* multiply data chunks by size of headers */ 775 bytecount = ((segs - 1) * skb_headlen(skb)) + 776 skb->len; 777 total_packets += segs; 778 total_bytes += bytecount; 779 } 780 781 igbvf_put_txbuf(adapter, buffer_info); 782 tx_desc->wb.status = 0; 783 784 i++; 785 if (i == tx_ring->count) 786 i = 0; 787 } 788 eop = tx_ring->buffer_info[i].next_to_watch; 789 eop_desc = IGBVF_TX_DESC_ADV(*tx_ring, eop); 790 } 791 792 tx_ring->next_to_clean = i; 793 794 if (unlikely(count && 795 netif_carrier_ok(netdev) && 796 igbvf_desc_unused(tx_ring) >= IGBVF_TX_QUEUE_WAKE)) { 797 /* Make sure that anybody stopping the queue after this 798 * sees the new next_to_clean. 799 */ 800 smp_mb(); 801 if (netif_queue_stopped(netdev) && 802 !(test_bit(__IGBVF_DOWN, &adapter->state))) { 803 netif_wake_queue(netdev); 804 ++adapter->restart_queue; 805 } 806 } 807 808 adapter->net_stats.tx_bytes += total_bytes; 809 adapter->net_stats.tx_packets += total_packets; 810 return count < tx_ring->count; 811} 812 813static irqreturn_t igbvf_msix_other(int irq, void *data) 814{ 815 struct net_device *netdev = data; 816 struct igbvf_adapter *adapter = netdev_priv(netdev); 817 struct e1000_hw *hw = &adapter->hw; 818 819 adapter->int_counter1++; 820 821 netif_carrier_off(netdev); 822 hw->mac.get_link_status = 1; 823 if (!test_bit(__IGBVF_DOWN, &adapter->state)) 824 mod_timer(&adapter->watchdog_timer, jiffies + 1); 825 826 ew32(EIMS, adapter->eims_other); 827 828 return IRQ_HANDLED; 829} 830 831static irqreturn_t igbvf_intr_msix_tx(int irq, void *data) 832{ 833 struct net_device *netdev = data; 834 struct igbvf_adapter *adapter = netdev_priv(netdev); 835 struct e1000_hw *hw = &adapter->hw; 836 struct igbvf_ring *tx_ring = adapter->tx_ring; 837 838 839 adapter->total_tx_bytes = 0; 840 adapter->total_tx_packets = 0; 841 842 /* auto mask will automatically reenable the interrupt when we write 843 * EICS */ 844 if (!igbvf_clean_tx_irq(tx_ring)) 845 /* Ring was not completely cleaned, so fire another interrupt */ 846 ew32(EICS, tx_ring->eims_value); 847 else 848 ew32(EIMS, tx_ring->eims_value); 849 850 return IRQ_HANDLED; 851} 852 853static irqreturn_t igbvf_intr_msix_rx(int irq, void *data) 854{ 855 struct net_device *netdev = data; 856 struct igbvf_adapter *adapter = netdev_priv(netdev); 857 858 adapter->int_counter0++; 859 860 /* Write the ITR value calculated at the end of the 861 * previous interrupt. 862 */ 863 if (adapter->rx_ring->set_itr) { 864 writel(adapter->rx_ring->itr_val, 865 adapter->hw.hw_addr + adapter->rx_ring->itr_register); 866 adapter->rx_ring->set_itr = 0; 867 } 868 869 if (napi_schedule_prep(&adapter->rx_ring->napi)) { 870 adapter->total_rx_bytes = 0; 871 adapter->total_rx_packets = 0; 872 __napi_schedule(&adapter->rx_ring->napi); 873 } 874 875 return IRQ_HANDLED; 876} 877 878#define IGBVF_NO_QUEUE -1 879 880static void igbvf_assign_vector(struct igbvf_adapter *adapter, int rx_queue, 881 int tx_queue, int msix_vector) 882{ 883 struct e1000_hw *hw = &adapter->hw; 884 u32 ivar, index; 885 886 /* 82576 uses a table-based method for assigning vectors. 887 Each queue has a single entry in the table to which we write 888 a vector number along with a "valid" bit. Sadly, the layout 889 of the table is somewhat counterintuitive. */ 890 if (rx_queue > IGBVF_NO_QUEUE) { 891 index = (rx_queue >> 1); 892 ivar = array_er32(IVAR0, index); 893 if (rx_queue & 0x1) { 894 /* vector goes into third byte of register */ 895 ivar = ivar & 0xFF00FFFF; 896 ivar |= (msix_vector | E1000_IVAR_VALID) << 16; 897 } else { 898 /* vector goes into low byte of register */ 899 ivar = ivar & 0xFFFFFF00; 900 ivar |= msix_vector | E1000_IVAR_VALID; 901 } 902 adapter->rx_ring[rx_queue].eims_value = 1 << msix_vector; 903 array_ew32(IVAR0, index, ivar); 904 } 905 if (tx_queue > IGBVF_NO_QUEUE) { 906 index = (tx_queue >> 1); 907 ivar = array_er32(IVAR0, index); 908 if (tx_queue & 0x1) { 909 /* vector goes into high byte of register */ 910 ivar = ivar & 0x00FFFFFF; 911 ivar |= (msix_vector | E1000_IVAR_VALID) << 24; 912 } else { 913 /* vector goes into second byte of register */ 914 ivar = ivar & 0xFFFF00FF; 915 ivar |= (msix_vector | E1000_IVAR_VALID) << 8; 916 } 917 adapter->tx_ring[tx_queue].eims_value = 1 << msix_vector; 918 array_ew32(IVAR0, index, ivar); 919 } 920} 921 922/** 923 * igbvf_configure_msix - Configure MSI-X hardware 924 * 925 * igbvf_configure_msix sets up the hardware to properly 926 * generate MSI-X interrupts. 927 **/ 928static void igbvf_configure_msix(struct igbvf_adapter *adapter) 929{ 930 u32 tmp; 931 struct e1000_hw *hw = &adapter->hw; 932 struct igbvf_ring *tx_ring = adapter->tx_ring; 933 struct igbvf_ring *rx_ring = adapter->rx_ring; 934 int vector = 0; 935 936 adapter->eims_enable_mask = 0; 937 938 igbvf_assign_vector(adapter, IGBVF_NO_QUEUE, 0, vector++); 939 adapter->eims_enable_mask |= tx_ring->eims_value; 940 if (tx_ring->itr_val) 941 writel(tx_ring->itr_val, 942 hw->hw_addr + tx_ring->itr_register); 943 else 944 writel(1952, hw->hw_addr + tx_ring->itr_register); 945 946 igbvf_assign_vector(adapter, 0, IGBVF_NO_QUEUE, vector++); 947 adapter->eims_enable_mask |= rx_ring->eims_value; 948 if (rx_ring->itr_val) 949 writel(rx_ring->itr_val, 950 hw->hw_addr + rx_ring->itr_register); 951 else 952 writel(1952, hw->hw_addr + rx_ring->itr_register); 953 954 /* set vector for other causes, i.e. link changes */ 955 956 tmp = (vector++ | E1000_IVAR_VALID); 957 958 ew32(IVAR_MISC, tmp); 959 960 adapter->eims_enable_mask = (1 << (vector)) - 1; 961 adapter->eims_other = 1 << (vector - 1); 962 e1e_flush(); 963} 964 965static void igbvf_reset_interrupt_capability(struct igbvf_adapter *adapter) 966{ 967 if (adapter->msix_entries) { 968 pci_disable_msix(adapter->pdev); 969 kfree(adapter->msix_entries); 970 adapter->msix_entries = NULL; 971 } 972} 973 974/** 975 * igbvf_set_interrupt_capability - set MSI or MSI-X if supported 976 * 977 * Attempt to configure interrupts using the best available 978 * capabilities of the hardware and kernel. 979 **/ 980static void igbvf_set_interrupt_capability(struct igbvf_adapter *adapter) 981{ 982 int err = -ENOMEM; 983 int i; 984 985 /* we allocate 3 vectors, 1 for tx, 1 for rx, one for pf messages */ 986 adapter->msix_entries = kcalloc(3, sizeof(struct msix_entry), 987 GFP_KERNEL); 988 if (adapter->msix_entries) { 989 for (i = 0; i < 3; i++) 990 adapter->msix_entries[i].entry = i; 991 992 err = pci_enable_msix(adapter->pdev, 993 adapter->msix_entries, 3); 994 } 995 996 if (err) { 997 /* MSI-X failed */ 998 dev_err(&adapter->pdev->dev, 999 "Failed to initialize MSI-X interrupts.\n"); 1000 igbvf_reset_interrupt_capability(adapter); 1001 } 1002} 1003 1004/** 1005 * igbvf_request_msix - Initialize MSI-X interrupts 1006 * 1007 * igbvf_request_msix allocates MSI-X vectors and requests interrupts from the 1008 * kernel. 1009 **/ 1010static int igbvf_request_msix(struct igbvf_adapter *adapter) 1011{ 1012 struct net_device *netdev = adapter->netdev; 1013 int err = 0, vector = 0; 1014 1015 if (strlen(netdev->name) < (IFNAMSIZ - 5)) { 1016 sprintf(adapter->tx_ring->name, "%s-tx-0", netdev->name); 1017 sprintf(adapter->rx_ring->name, "%s-rx-0", netdev->name); 1018 } else { 1019 memcpy(adapter->tx_ring->name, netdev->name, IFNAMSIZ); 1020 memcpy(adapter->rx_ring->name, netdev->name, IFNAMSIZ); 1021 } 1022 1023 err = request_irq(adapter->msix_entries[vector].vector, 1024 igbvf_intr_msix_tx, 0, adapter->tx_ring->name, 1025 netdev); 1026 if (err) 1027 goto out; 1028 1029 adapter->tx_ring->itr_register = E1000_EITR(vector); 1030 adapter->tx_ring->itr_val = 1952; 1031 vector++; 1032 1033 err = request_irq(adapter->msix_entries[vector].vector, 1034 igbvf_intr_msix_rx, 0, adapter->rx_ring->name, 1035 netdev); 1036 if (err) 1037 goto out; 1038 1039 adapter->rx_ring->itr_register = E1000_EITR(vector); 1040 adapter->rx_ring->itr_val = 1952; 1041 vector++; 1042 1043 err = request_irq(adapter->msix_entries[vector].vector, 1044 igbvf_msix_other, 0, netdev->name, netdev); 1045 if (err) 1046 goto out; 1047 1048 igbvf_configure_msix(adapter); 1049 return 0; 1050out: 1051 return err; 1052} 1053 1054/** 1055 * igbvf_alloc_queues - Allocate memory for all rings 1056 * @adapter: board private structure to initialize 1057 **/ 1058static int __devinit igbvf_alloc_queues(struct igbvf_adapter *adapter) 1059{ 1060 struct net_device *netdev = adapter->netdev; 1061 1062 adapter->tx_ring = kzalloc(sizeof(struct igbvf_ring), GFP_KERNEL); 1063 if (!adapter->tx_ring) 1064 return -ENOMEM; 1065 1066 adapter->rx_ring = kzalloc(sizeof(struct igbvf_ring), GFP_KERNEL); 1067 if (!adapter->rx_ring) { 1068 kfree(adapter->tx_ring); 1069 return -ENOMEM; 1070 } 1071 1072 netif_napi_add(netdev, &adapter->rx_ring->napi, igbvf_poll, 64); 1073 1074 return 0; 1075} 1076 1077/** 1078 * igbvf_request_irq - initialize interrupts 1079 * 1080 * Attempts to configure interrupts using the best available 1081 * capabilities of the hardware and kernel. 1082 **/ 1083static int igbvf_request_irq(struct igbvf_adapter *adapter) 1084{ 1085 int err = -1; 1086 1087 /* igbvf supports msi-x only */ 1088 if (adapter->msix_entries) 1089 err = igbvf_request_msix(adapter); 1090 1091 if (!err) 1092 return err; 1093 1094 dev_err(&adapter->pdev->dev, 1095 "Unable to allocate interrupt, Error: %d\n", err); 1096 1097 return err; 1098} 1099 1100static void igbvf_free_irq(struct igbvf_adapter *adapter) 1101{ 1102 struct net_device *netdev = adapter->netdev; 1103 int vector; 1104 1105 if (adapter->msix_entries) { 1106 for (vector = 0; vector < 3; vector++) 1107 free_irq(adapter->msix_entries[vector].vector, netdev); 1108 } 1109} 1110 1111/** 1112 * igbvf_irq_disable - Mask off interrupt generation on the NIC 1113 **/ 1114static void igbvf_irq_disable(struct igbvf_adapter *adapter) 1115{ 1116 struct e1000_hw *hw = &adapter->hw; 1117 1118 ew32(EIMC, ~0); 1119 1120 if (adapter->msix_entries) 1121 ew32(EIAC, 0); 1122} 1123 1124/** 1125 * igbvf_irq_enable - Enable default interrupt generation settings 1126 **/ 1127static void igbvf_irq_enable(struct igbvf_adapter *adapter) 1128{ 1129 struct e1000_hw *hw = &adapter->hw; 1130 1131 ew32(EIAC, adapter->eims_enable_mask); 1132 ew32(EIAM, adapter->eims_enable_mask); 1133 ew32(EIMS, adapter->eims_enable_mask); 1134} 1135 1136/** 1137 * igbvf_poll - NAPI Rx polling callback 1138 * @napi: struct associated with this polling callback 1139 * @budget: amount of packets driver is allowed to process this poll 1140 **/ 1141static int igbvf_poll(struct napi_struct *napi, int budget) 1142{ 1143 struct igbvf_ring *rx_ring = container_of(napi, struct igbvf_ring, napi); 1144 struct igbvf_adapter *adapter = rx_ring->adapter; 1145 struct e1000_hw *hw = &adapter->hw; 1146 int work_done = 0; 1147 1148 igbvf_clean_rx_irq(adapter, &work_done, budget); 1149 1150 /* If not enough Rx work done, exit the polling mode */ 1151 if (work_done < budget) { 1152 napi_complete(napi); 1153 1154 if (adapter->itr_setting & 3) 1155 igbvf_set_itr(adapter); 1156 1157 if (!test_bit(__IGBVF_DOWN, &adapter->state)) 1158 ew32(EIMS, adapter->rx_ring->eims_value); 1159 } 1160 1161 return work_done; 1162} 1163 1164/** 1165 * igbvf_set_rlpml - set receive large packet maximum length 1166 * @adapter: board private structure 1167 * 1168 * Configure the maximum size of packets that will be received 1169 */ 1170static void igbvf_set_rlpml(struct igbvf_adapter *adapter) 1171{ 1172 int max_frame_size; 1173 struct e1000_hw *hw = &adapter->hw; 1174 1175 max_frame_size = adapter->max_frame_size + VLAN_TAG_SIZE; 1176 e1000_rlpml_set_vf(hw, max_frame_size); 1177} 1178 1179static int igbvf_vlan_rx_add_vid(struct net_device *netdev, u16 vid) 1180{ 1181 struct igbvf_adapter *adapter = netdev_priv(netdev); 1182 struct e1000_hw *hw = &adapter->hw; 1183 1184 if (hw->mac.ops.set_vfta(hw, vid, true)) { 1185 dev_err(&adapter->pdev->dev, "Failed to add vlan id %d\n", vid); 1186 return -EINVAL; 1187 } 1188 set_bit(vid, adapter->active_vlans); 1189 return 0; 1190} 1191 1192static int igbvf_vlan_rx_kill_vid(struct net_device *netdev, u16 vid) 1193{ 1194 struct igbvf_adapter *adapter = netdev_priv(netdev); 1195 struct e1000_hw *hw = &adapter->hw; 1196 1197 if (hw->mac.ops.set_vfta(hw, vid, false)) { 1198 dev_err(&adapter->pdev->dev, 1199 "Failed to remove vlan id %d\n", vid); 1200 return -EINVAL; 1201 } 1202 clear_bit(vid, adapter->active_vlans); 1203 return 0; 1204} 1205 1206static void igbvf_restore_vlan(struct igbvf_adapter *adapter) 1207{ 1208 u16 vid; 1209 1210 for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID) 1211 igbvf_vlan_rx_add_vid(adapter->netdev, vid); 1212} 1213 1214/** 1215 * igbvf_configure_tx - Configure Transmit Unit after Reset 1216 * @adapter: board private structure 1217 * 1218 * Configure the Tx unit of the MAC after a reset. 1219 **/ 1220static void igbvf_configure_tx(struct igbvf_adapter *adapter) 1221{ 1222 struct e1000_hw *hw = &adapter->hw; 1223 struct igbvf_ring *tx_ring = adapter->tx_ring; 1224 u64 tdba; 1225 u32 txdctl, dca_txctrl; 1226 1227 /* disable transmits */ 1228 txdctl = er32(TXDCTL(0)); 1229 ew32(TXDCTL(0), txdctl & ~E1000_TXDCTL_QUEUE_ENABLE); 1230 e1e_flush(); 1231 msleep(10); 1232 1233 /* Setup the HW Tx Head and Tail descriptor pointers */ 1234 ew32(TDLEN(0), tx_ring->count * sizeof(union e1000_adv_tx_desc)); 1235 tdba = tx_ring->dma; 1236 ew32(TDBAL(0), (tdba & DMA_BIT_MASK(32))); 1237 ew32(TDBAH(0), (tdba >> 32)); 1238 ew32(TDH(0), 0); 1239 ew32(TDT(0), 0); 1240 tx_ring->head = E1000_TDH(0); 1241 tx_ring->tail = E1000_TDT(0); 1242 1243 /* Turn off Relaxed Ordering on head write-backs. The writebacks 1244 * MUST be delivered in order or it will completely screw up 1245 * our bookeeping. 1246 */ 1247 dca_txctrl = er32(DCA_TXCTRL(0)); 1248 dca_txctrl &= ~E1000_DCA_TXCTRL_TX_WB_RO_EN; 1249 ew32(DCA_TXCTRL(0), dca_txctrl); 1250 1251 /* enable transmits */ 1252 txdctl |= E1000_TXDCTL_QUEUE_ENABLE; 1253 ew32(TXDCTL(0), txdctl); 1254 1255 /* Setup Transmit Descriptor Settings for eop descriptor */ 1256 adapter->txd_cmd = E1000_ADVTXD_DCMD_EOP | E1000_ADVTXD_DCMD_IFCS; 1257 1258 /* enable Report Status bit */ 1259 adapter->txd_cmd |= E1000_ADVTXD_DCMD_RS; 1260} 1261 1262/** 1263 * igbvf_setup_srrctl - configure the receive control registers 1264 * @adapter: Board private structure 1265 **/ 1266static void igbvf_setup_srrctl(struct igbvf_adapter *adapter) 1267{ 1268 struct e1000_hw *hw = &adapter->hw; 1269 u32 srrctl = 0; 1270 1271 srrctl &= ~(E1000_SRRCTL_DESCTYPE_MASK | 1272 E1000_SRRCTL_BSIZEHDR_MASK | 1273 E1000_SRRCTL_BSIZEPKT_MASK); 1274 1275 /* Enable queue drop to avoid head of line blocking */ 1276 srrctl |= E1000_SRRCTL_DROP_EN; 1277 1278 /* Setup buffer sizes */ 1279 srrctl |= ALIGN(adapter->rx_buffer_len, 1024) >> 1280 E1000_SRRCTL_BSIZEPKT_SHIFT; 1281 1282 if (adapter->rx_buffer_len < 2048) { 1283 adapter->rx_ps_hdr_size = 0; 1284 srrctl |= E1000_SRRCTL_DESCTYPE_ADV_ONEBUF; 1285 } else { 1286 adapter->rx_ps_hdr_size = 128; 1287 srrctl |= adapter->rx_ps_hdr_size << 1288 E1000_SRRCTL_BSIZEHDRSIZE_SHIFT; 1289 srrctl |= E1000_SRRCTL_DESCTYPE_HDR_SPLIT_ALWAYS; 1290 } 1291 1292 ew32(SRRCTL(0), srrctl); 1293} 1294 1295/** 1296 * igbvf_configure_rx - Configure Receive Unit after Reset 1297 * @adapter: board private structure 1298 * 1299 * Configure the Rx unit of the MAC after a reset. 1300 **/ 1301static void igbvf_configure_rx(struct igbvf_adapter *adapter) 1302{ 1303 struct e1000_hw *hw = &adapter->hw; 1304 struct igbvf_ring *rx_ring = adapter->rx_ring; 1305 u64 rdba; 1306 u32 rdlen, rxdctl; 1307 1308 /* disable receives */ 1309 rxdctl = er32(RXDCTL(0)); 1310 ew32(RXDCTL(0), rxdctl & ~E1000_RXDCTL_QUEUE_ENABLE); 1311 e1e_flush(); 1312 msleep(10); 1313 1314 rdlen = rx_ring->count * sizeof(union e1000_adv_rx_desc); 1315 1316 /* 1317 * Setup the HW Rx Head and Tail Descriptor Pointers and 1318 * the Base and Length of the Rx Descriptor Ring 1319 */ 1320 rdba = rx_ring->dma; 1321 ew32(RDBAL(0), (rdba & DMA_BIT_MASK(32))); 1322 ew32(RDBAH(0), (rdba >> 32)); 1323 ew32(RDLEN(0), rx_ring->count * sizeof(union e1000_adv_rx_desc)); 1324 rx_ring->head = E1000_RDH(0); 1325 rx_ring->tail = E1000_RDT(0); 1326 ew32(RDH(0), 0); 1327 ew32(RDT(0), 0); 1328 1329 rxdctl |= E1000_RXDCTL_QUEUE_ENABLE; 1330 rxdctl &= 0xFFF00000; 1331 rxdctl |= IGBVF_RX_PTHRESH; 1332 rxdctl |= IGBVF_RX_HTHRESH << 8; 1333 rxdctl |= IGBVF_RX_WTHRESH << 16; 1334 1335 igbvf_set_rlpml(adapter); 1336 1337 /* enable receives */ 1338 ew32(RXDCTL(0), rxdctl); 1339} 1340 1341/** 1342 * igbvf_set_multi - Multicast and Promiscuous mode set 1343 * @netdev: network interface device structure 1344 * 1345 * The set_multi entry point is called whenever the multicast address 1346 * list or the network interface flags are updated. This routine is 1347 * responsible for configuring the hardware for proper multicast, 1348 * promiscuous mode, and all-multi behavior. 1349 **/ 1350static void igbvf_set_multi(struct net_device *netdev) 1351{ 1352 struct igbvf_adapter *adapter = netdev_priv(netdev); 1353 struct e1000_hw *hw = &adapter->hw; 1354 struct netdev_hw_addr *ha; 1355 u8 *mta_list = NULL; 1356 int i; 1357 1358 if (!netdev_mc_empty(netdev)) { 1359 mta_list = kmalloc(netdev_mc_count(netdev) * 6, GFP_ATOMIC); 1360 if (!mta_list) { 1361 dev_err(&adapter->pdev->dev, 1362 "failed to allocate multicast filter list\n"); 1363 return; 1364 } 1365 } 1366 1367 /* prepare a packed array of only addresses. */ 1368 i = 0; 1369 netdev_for_each_mc_addr(ha, netdev) 1370 memcpy(mta_list + (i++ * ETH_ALEN), ha->addr, ETH_ALEN); 1371 1372 hw->mac.ops.update_mc_addr_list(hw, mta_list, i, 0, 0); 1373 kfree(mta_list); 1374} 1375 1376/** 1377 * igbvf_configure - configure the hardware for Rx and Tx 1378 * @adapter: private board structure 1379 **/ 1380static void igbvf_configure(struct igbvf_adapter *adapter) 1381{ 1382 igbvf_set_multi(adapter->netdev); 1383 1384 igbvf_restore_vlan(adapter); 1385 1386 igbvf_configure_tx(adapter); 1387 igbvf_setup_srrctl(adapter); 1388 igbvf_configure_rx(adapter); 1389 igbvf_alloc_rx_buffers(adapter->rx_ring, 1390 igbvf_desc_unused(adapter->rx_ring)); 1391} 1392 1393/* igbvf_reset - bring the hardware into a known good state 1394 * 1395 * This function boots the hardware and enables some settings that 1396 * require a configuration cycle of the hardware - those cannot be 1397 * set/changed during runtime. After reset the device needs to be 1398 * properly configured for Rx, Tx etc. 1399 */ 1400static void igbvf_reset(struct igbvf_adapter *adapter) 1401{ 1402 struct e1000_mac_info *mac = &adapter->hw.mac; 1403 struct net_device *netdev = adapter->netdev; 1404 struct e1000_hw *hw = &adapter->hw; 1405 1406 /* Allow time for pending master requests to run */ 1407 if (mac->ops.reset_hw(hw)) 1408 dev_err(&adapter->pdev->dev, "PF still resetting\n"); 1409 1410 mac->ops.init_hw(hw); 1411 1412 if (is_valid_ether_addr(adapter->hw.mac.addr)) { 1413 memcpy(netdev->dev_addr, adapter->hw.mac.addr, 1414 netdev->addr_len); 1415 memcpy(netdev->perm_addr, adapter->hw.mac.addr, 1416 netdev->addr_len); 1417 } 1418 1419 adapter->last_reset = jiffies; 1420} 1421 1422int igbvf_up(struct igbvf_adapter *adapter) 1423{ 1424 struct e1000_hw *hw = &adapter->hw; 1425 1426 /* hardware has been reset, we need to reload some things */ 1427 igbvf_configure(adapter); 1428 1429 clear_bit(__IGBVF_DOWN, &adapter->state); 1430 1431 napi_enable(&adapter->rx_ring->napi); 1432 if (adapter->msix_entries) 1433 igbvf_configure_msix(adapter); 1434 1435 /* Clear any pending interrupts. */ 1436 er32(EICR); 1437 igbvf_irq_enable(adapter); 1438 1439 /* start the watchdog */ 1440 hw->mac.get_link_status = 1; 1441 mod_timer(&adapter->watchdog_timer, jiffies + 1); 1442 1443 1444 return 0; 1445} 1446 1447void igbvf_down(struct igbvf_adapter *adapter) 1448{ 1449 struct net_device *netdev = adapter->netdev; 1450 struct e1000_hw *hw = &adapter->hw; 1451 u32 rxdctl, txdctl; 1452 1453 /* 1454 * signal that we're down so the interrupt handler does not 1455 * reschedule our watchdog timer 1456 */ 1457 set_bit(__IGBVF_DOWN, &adapter->state); 1458 1459 /* disable receives in the hardware */ 1460 rxdctl = er32(RXDCTL(0)); 1461 ew32(RXDCTL(0), rxdctl & ~E1000_RXDCTL_QUEUE_ENABLE); 1462 1463 netif_stop_queue(netdev); 1464 1465 /* disable transmits in the hardware */ 1466 txdctl = er32(TXDCTL(0)); 1467 ew32(TXDCTL(0), txdctl & ~E1000_TXDCTL_QUEUE_ENABLE); 1468 1469 /* flush both disables and wait for them to finish */ 1470 e1e_flush(); 1471 msleep(10); 1472 1473 napi_disable(&adapter->rx_ring->napi); 1474 1475 igbvf_irq_disable(adapter); 1476 1477 del_timer_sync(&adapter->watchdog_timer); 1478 1479 netif_carrier_off(netdev); 1480 1481 /* record the stats before reset*/ 1482 igbvf_update_stats(adapter); 1483 1484 adapter->link_speed = 0; 1485 adapter->link_duplex = 0; 1486 1487 igbvf_reset(adapter); 1488 igbvf_clean_tx_ring(adapter->tx_ring); 1489 igbvf_clean_rx_ring(adapter->rx_ring); 1490} 1491 1492void igbvf_reinit_locked(struct igbvf_adapter *adapter) 1493{ 1494 might_sleep(); 1495 while (test_and_set_bit(__IGBVF_RESETTING, &adapter->state)) 1496 msleep(1); 1497 igbvf_down(adapter); 1498 igbvf_up(adapter); 1499 clear_bit(__IGBVF_RESETTING, &adapter->state); 1500} 1501 1502/** 1503 * igbvf_sw_init - Initialize general software structures (struct igbvf_adapter) 1504 * @adapter: board private structure to initialize 1505 * 1506 * igbvf_sw_init initializes the Adapter private data structure. 1507 * Fields are initialized based on PCI device information and 1508 * OS network device settings (MTU size). 1509 **/ 1510static int __devinit igbvf_sw_init(struct igbvf_adapter *adapter) 1511{ 1512 struct net_device *netdev = adapter->netdev; 1513 s32 rc; 1514 1515 adapter->rx_buffer_len = ETH_FRAME_LEN + VLAN_HLEN + ETH_FCS_LEN; 1516 adapter->rx_ps_hdr_size = 0; 1517 adapter->max_frame_size = netdev->mtu + ETH_HLEN + ETH_FCS_LEN; 1518 adapter->min_frame_size = ETH_ZLEN + ETH_FCS_LEN; 1519 1520 adapter->tx_int_delay = 8; 1521 adapter->tx_abs_int_delay = 32; 1522 adapter->rx_int_delay = 0; 1523 adapter->rx_abs_int_delay = 8; 1524 adapter->itr_setting = 3; 1525 adapter->itr = 20000; 1526 1527 /* Set various function pointers */ 1528 adapter->ei->init_ops(&adapter->hw); 1529 1530 rc = adapter->hw.mac.ops.init_params(&adapter->hw); 1531 if (rc) 1532 return rc; 1533 1534 rc = adapter->hw.mbx.ops.init_params(&adapter->hw); 1535 if (rc) 1536 return rc; 1537 1538 igbvf_set_interrupt_capability(adapter); 1539 1540 if (igbvf_alloc_queues(adapter)) 1541 return -ENOMEM; 1542 1543 spin_lock_init(&adapter->tx_queue_lock); 1544 1545 /* Explicitly disable IRQ since the NIC can be in any state. */ 1546 igbvf_irq_disable(adapter); 1547 1548 spin_lock_init(&adapter->stats_lock); 1549 1550 set_bit(__IGBVF_DOWN, &adapter->state); 1551 return 0; 1552} 1553 1554static void igbvf_initialize_last_counter_stats(struct igbvf_adapter *adapter) 1555{ 1556 struct e1000_hw *hw = &adapter->hw; 1557 1558 adapter->stats.last_gprc = er32(VFGPRC); 1559 adapter->stats.last_gorc = er32(VFGORC); 1560 adapter->stats.last_gptc = er32(VFGPTC); 1561 adapter->stats.last_gotc = er32(VFGOTC); 1562 adapter->stats.last_mprc = er32(VFMPRC); 1563 adapter->stats.last_gotlbc = er32(VFGOTLBC); 1564 adapter->stats.last_gptlbc = er32(VFGPTLBC); 1565 adapter->stats.last_gorlbc = er32(VFGORLBC); 1566 adapter->stats.last_gprlbc = er32(VFGPRLBC); 1567 1568 adapter->stats.base_gprc = er32(VFGPRC); 1569 adapter->stats.base_gorc = er32(VFGORC); 1570 adapter->stats.base_gptc = er32(VFGPTC); 1571 adapter->stats.base_gotc = er32(VFGOTC); 1572 adapter->stats.base_mprc = er32(VFMPRC); 1573 adapter->stats.base_gotlbc = er32(VFGOTLBC); 1574 adapter->stats.base_gptlbc = er32(VFGPTLBC); 1575 adapter->stats.base_gorlbc = er32(VFGORLBC); 1576 adapter->stats.base_gprlbc = er32(VFGPRLBC); 1577} 1578 1579/** 1580 * igbvf_open - Called when a network interface is made active 1581 * @netdev: network interface device structure 1582 * 1583 * Returns 0 on success, negative value on failure 1584 * 1585 * The open entry point is called when a network interface is made 1586 * active by the system (IFF_UP). At this point all resources needed 1587 * for transmit and receive operations are allocated, the interrupt 1588 * handler is registered with the OS, the watchdog timer is started, 1589 * and the stack is notified that the interface is ready. 1590 **/ 1591static int igbvf_open(struct net_device *netdev) 1592{ 1593 struct igbvf_adapter *adapter = netdev_priv(netdev); 1594 struct e1000_hw *hw = &adapter->hw; 1595 int err; 1596 1597 /* disallow open during test */ 1598 if (test_bit(__IGBVF_TESTING, &adapter->state)) 1599 return -EBUSY; 1600 1601 /* allocate transmit descriptors */ 1602 err = igbvf_setup_tx_resources(adapter, adapter->tx_ring); 1603 if (err) 1604 goto err_setup_tx; 1605 1606 /* allocate receive descriptors */ 1607 err = igbvf_setup_rx_resources(adapter, adapter->rx_ring); 1608 if (err) 1609 goto err_setup_rx; 1610 1611 /* 1612 * before we allocate an interrupt, we must be ready to handle it. 1613 * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt 1614 * as soon as we call pci_request_irq, so we have to setup our 1615 * clean_rx handler before we do so. 1616 */ 1617 igbvf_configure(adapter); 1618 1619 err = igbvf_request_irq(adapter); 1620 if (err) 1621 goto err_req_irq; 1622 1623 /* From here on the code is the same as igbvf_up() */ 1624 clear_bit(__IGBVF_DOWN, &adapter->state); 1625 1626 napi_enable(&adapter->rx_ring->napi); 1627 1628 /* clear any pending interrupts */ 1629 er32(EICR); 1630 1631 igbvf_irq_enable(adapter); 1632 1633 /* start the watchdog */ 1634 hw->mac.get_link_status = 1; 1635 mod_timer(&adapter->watchdog_timer, jiffies + 1); 1636 1637 return 0; 1638 1639err_req_irq: 1640 igbvf_free_rx_resources(adapter->rx_ring); 1641err_setup_rx: 1642 igbvf_free_tx_resources(adapter->tx_ring); 1643err_setup_tx: 1644 igbvf_reset(adapter); 1645 1646 return err; 1647} 1648 1649/** 1650 * igbvf_close - Disables a network interface 1651 * @netdev: network interface device structure 1652 * 1653 * Returns 0, this is not allowed to fail 1654 * 1655 * The close entry point is called when an interface is de-activated 1656 * by the OS. The hardware is still under the drivers control, but 1657 * needs to be disabled. A global MAC reset is issued to stop the 1658 * hardware, and all transmit and receive resources are freed. 1659 **/ 1660static int igbvf_close(struct net_device *netdev) 1661{ 1662 struct igbvf_adapter *adapter = netdev_priv(netdev); 1663 1664 WARN_ON(test_bit(__IGBVF_RESETTING, &adapter->state)); 1665 igbvf_down(adapter); 1666 1667 igbvf_free_irq(adapter); 1668 1669 igbvf_free_tx_resources(adapter->tx_ring); 1670 igbvf_free_rx_resources(adapter->rx_ring); 1671 1672 return 0; 1673} 1674/** 1675 * igbvf_set_mac - Change the Ethernet Address of the NIC 1676 * @netdev: network interface device structure 1677 * @p: pointer to an address structure 1678 * 1679 * Returns 0 on success, negative on failure 1680 **/ 1681static int igbvf_set_mac(struct net_device *netdev, void *p) 1682{ 1683 struct igbvf_adapter *adapter = netdev_priv(netdev); 1684 struct e1000_hw *hw = &adapter->hw; 1685 struct sockaddr *addr = p; 1686 1687 if (!is_valid_ether_addr(addr->sa_data)) 1688 return -EADDRNOTAVAIL; 1689 1690 memcpy(hw->mac.addr, addr->sa_data, netdev->addr_len); 1691 1692 hw->mac.ops.rar_set(hw, hw->mac.addr, 0); 1693 1694 if (memcmp(addr->sa_data, hw->mac.addr, 6)) 1695 return -EADDRNOTAVAIL; 1696 1697 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len); 1698 1699 return 0; 1700} 1701 1702#define UPDATE_VF_COUNTER(reg, name) \ 1703 { \ 1704 u32 current_counter = er32(reg); \ 1705 if (current_counter < adapter->stats.last_##name) \ 1706 adapter->stats.name += 0x100000000LL; \ 1707 adapter->stats.last_##name = current_counter; \ 1708 adapter->stats.name &= 0xFFFFFFFF00000000LL; \ 1709 adapter->stats.name |= current_counter; \ 1710 } 1711 1712/** 1713 * igbvf_update_stats - Update the board statistics counters 1714 * @adapter: board private structure 1715**/ 1716void igbvf_update_stats(struct igbvf_adapter *adapter) 1717{ 1718 struct e1000_hw *hw = &adapter->hw; 1719 struct pci_dev *pdev = adapter->pdev; 1720 1721 /* 1722 * Prevent stats update while adapter is being reset, link is down 1723 * or if the pci connection is down. 1724 */ 1725 if (adapter->link_speed == 0) 1726 return; 1727 1728 if (test_bit(__IGBVF_RESETTING, &adapter->state)) 1729 return; 1730 1731 if (pci_channel_offline(pdev)) 1732 return; 1733 1734 UPDATE_VF_COUNTER(VFGPRC, gprc); 1735 UPDATE_VF_COUNTER(VFGORC, gorc); 1736 UPDATE_VF_COUNTER(VFGPTC, gptc); 1737 UPDATE_VF_COUNTER(VFGOTC, gotc); 1738 UPDATE_VF_COUNTER(VFMPRC, mprc); 1739 UPDATE_VF_COUNTER(VFGOTLBC, gotlbc); 1740 UPDATE_VF_COUNTER(VFGPTLBC, gptlbc); 1741 UPDATE_VF_COUNTER(VFGORLBC, gorlbc); 1742 UPDATE_VF_COUNTER(VFGPRLBC, gprlbc); 1743 1744 /* Fill out the OS statistics structure */ 1745 adapter->net_stats.multicast = adapter->stats.mprc; 1746} 1747 1748static void igbvf_print_link_info(struct igbvf_adapter *adapter) 1749{ 1750 dev_info(&adapter->pdev->dev, "Link is Up %d Mbps %s Duplex\n", 1751 adapter->link_speed, 1752 adapter->link_duplex == FULL_DUPLEX ? "Full" : "Half"); 1753} 1754 1755static bool igbvf_has_link(struct igbvf_adapter *adapter) 1756{ 1757 struct e1000_hw *hw = &adapter->hw; 1758 s32 ret_val = E1000_SUCCESS; 1759 bool link_active; 1760 1761 /* If interface is down, stay link down */ 1762 if (test_bit(__IGBVF_DOWN, &adapter->state)) 1763 return false; 1764 1765 ret_val = hw->mac.ops.check_for_link(hw); 1766 link_active = !hw->mac.get_link_status; 1767 1768 /* if check for link returns error we will need to reset */ 1769 if (ret_val && time_after(jiffies, adapter->last_reset + (10 * HZ))) 1770 schedule_work(&adapter->reset_task); 1771 1772 return link_active; 1773} 1774 1775/** 1776 * igbvf_watchdog - Timer Call-back 1777 * @data: pointer to adapter cast into an unsigned long 1778 **/ 1779static void igbvf_watchdog(unsigned long data) 1780{ 1781 struct igbvf_adapter *adapter = (struct igbvf_adapter *) data; 1782 1783 /* Do the rest outside of interrupt context */ 1784 schedule_work(&adapter->watchdog_task); 1785} 1786 1787static void igbvf_watchdog_task(struct work_struct *work) 1788{ 1789 struct igbvf_adapter *adapter = container_of(work, 1790 struct igbvf_adapter, 1791 watchdog_task); 1792 struct net_device *netdev = adapter->netdev; 1793 struct e1000_mac_info *mac = &adapter->hw.mac; 1794 struct igbvf_ring *tx_ring = adapter->tx_ring; 1795 struct e1000_hw *hw = &adapter->hw; 1796 u32 link; 1797 int tx_pending = 0; 1798 1799 link = igbvf_has_link(adapter); 1800 1801 if (link) { 1802 if (!netif_carrier_ok(netdev)) { 1803 mac->ops.get_link_up_info(&adapter->hw, 1804 &adapter->link_speed, 1805 &adapter->link_duplex); 1806 igbvf_print_link_info(adapter); 1807 1808 netif_carrier_on(netdev); 1809 netif_wake_queue(netdev); 1810 } 1811 } else { 1812 if (netif_carrier_ok(netdev)) { 1813 adapter->link_speed = 0; 1814 adapter->link_duplex = 0; 1815 dev_info(&adapter->pdev->dev, "Link is Down\n"); 1816 netif_carrier_off(netdev); 1817 netif_stop_queue(netdev); 1818 } 1819 } 1820 1821 if (netif_carrier_ok(netdev)) { 1822 igbvf_update_stats(adapter); 1823 } else { 1824 tx_pending = (igbvf_desc_unused(tx_ring) + 1 < 1825 tx_ring->count); 1826 if (tx_pending) { 1827 /* 1828 * We've lost link, so the controller stops DMA, 1829 * but we've got queued Tx work that's never going 1830 * to get done, so reset controller to flush Tx. 1831 * (Do the reset outside of interrupt context). 1832 */ 1833 adapter->tx_timeout_count++; 1834 schedule_work(&adapter->reset_task); 1835 } 1836 } 1837 1838 /* Cause software interrupt to ensure Rx ring is cleaned */ 1839 ew32(EICS, adapter->rx_ring->eims_value); 1840 1841 /* Reset the timer */ 1842 if (!test_bit(__IGBVF_DOWN, &adapter->state)) 1843 mod_timer(&adapter->watchdog_timer, 1844 round_jiffies(jiffies + (2 * HZ))); 1845} 1846 1847#define IGBVF_TX_FLAGS_CSUM 0x00000001 1848#define IGBVF_TX_FLAGS_VLAN 0x00000002 1849#define IGBVF_TX_FLAGS_TSO 0x00000004 1850#define IGBVF_TX_FLAGS_IPV4 0x00000008 1851#define IGBVF_TX_FLAGS_VLAN_MASK 0xffff0000 1852#define IGBVF_TX_FLAGS_VLAN_SHIFT 16 1853 1854static int igbvf_tso(struct igbvf_adapter *adapter, 1855 struct igbvf_ring *tx_ring, 1856 struct sk_buff *skb, u32 tx_flags, u8 *hdr_len) 1857{ 1858 struct e1000_adv_tx_context_desc *context_desc; 1859 unsigned int i; 1860 int err; 1861 struct igbvf_buffer *buffer_info; 1862 u32 info = 0, tu_cmd = 0; 1863 u32 mss_l4len_idx, l4len; 1864 *hdr_len = 0; 1865 1866 if (skb_header_cloned(skb)) { 1867 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC); 1868 if (err) { 1869 dev_err(&adapter->pdev->dev, 1870 "igbvf_tso returning an error\n"); 1871 return err; 1872 } 1873 } 1874 1875 l4len = tcp_hdrlen(skb); 1876 *hdr_len += l4len; 1877 1878 if (skb->protocol == htons(ETH_P_IP)) { 1879 struct iphdr *iph = ip_hdr(skb); 1880 iph->tot_len = 0; 1881 iph->check = 0; 1882 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr, 1883 iph->daddr, 0, 1884 IPPROTO_TCP, 1885 0); 1886 } else if (skb_is_gso_v6(skb)) { 1887 ipv6_hdr(skb)->payload_len = 0; 1888 tcp_hdr(skb)->check = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr, 1889 &ipv6_hdr(skb)->daddr, 1890 0, IPPROTO_TCP, 0); 1891 } 1892 1893 i = tx_ring->next_to_use; 1894 1895 buffer_info = &tx_ring->buffer_info[i]; 1896 context_desc = IGBVF_TX_CTXTDESC_ADV(*tx_ring, i); 1897 /* VLAN MACLEN IPLEN */ 1898 if (tx_flags & IGBVF_TX_FLAGS_VLAN) 1899 info |= (tx_flags & IGBVF_TX_FLAGS_VLAN_MASK); 1900 info |= (skb_network_offset(skb) << E1000_ADVTXD_MACLEN_SHIFT); 1901 *hdr_len += skb_network_offset(skb); 1902 info |= (skb_transport_header(skb) - skb_network_header(skb)); 1903 *hdr_len += (skb_transport_header(skb) - skb_network_header(skb)); 1904 context_desc->vlan_macip_lens = cpu_to_le32(info); 1905 1906 /* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */ 1907 tu_cmd |= (E1000_TXD_CMD_DEXT | E1000_ADVTXD_DTYP_CTXT); 1908 1909 if (skb->protocol == htons(ETH_P_IP)) 1910 tu_cmd |= E1000_ADVTXD_TUCMD_IPV4; 1911 tu_cmd |= E1000_ADVTXD_TUCMD_L4T_TCP; 1912 1913 context_desc->type_tucmd_mlhl = cpu_to_le32(tu_cmd); 1914 1915 /* MSS L4LEN IDX */ 1916 mss_l4len_idx = (skb_shinfo(skb)->gso_size << E1000_ADVTXD_MSS_SHIFT); 1917 mss_l4len_idx |= (l4len << E1000_ADVTXD_L4LEN_SHIFT); 1918 1919 context_desc->mss_l4len_idx = cpu_to_le32(mss_l4len_idx); 1920 context_desc->seqnum_seed = 0; 1921 1922 buffer_info->time_stamp = jiffies; 1923 buffer_info->next_to_watch = i; 1924 buffer_info->dma = 0; 1925 i++; 1926 if (i == tx_ring->count) 1927 i = 0; 1928 1929 tx_ring->next_to_use = i; 1930 1931 return true; 1932} 1933 1934static inline bool igbvf_tx_csum(struct igbvf_adapter *adapter, 1935 struct igbvf_ring *tx_ring, 1936 struct sk_buff *skb, u32 tx_flags) 1937{ 1938 struct e1000_adv_tx_context_desc *context_desc; 1939 unsigned int i; 1940 struct igbvf_buffer *buffer_info; 1941 u32 info = 0, tu_cmd = 0; 1942 1943 if ((skb->ip_summed == CHECKSUM_PARTIAL) || 1944 (tx_flags & IGBVF_TX_FLAGS_VLAN)) { 1945 i = tx_ring->next_to_use; 1946 buffer_info = &tx_ring->buffer_info[i]; 1947 context_desc = IGBVF_TX_CTXTDESC_ADV(*tx_ring, i); 1948 1949 if (tx_flags & IGBVF_TX_FLAGS_VLAN) 1950 info |= (tx_flags & IGBVF_TX_FLAGS_VLAN_MASK); 1951 1952 info |= (skb_network_offset(skb) << E1000_ADVTXD_MACLEN_SHIFT); 1953 if (skb->ip_summed == CHECKSUM_PARTIAL) 1954 info |= (skb_transport_header(skb) - 1955 skb_network_header(skb)); 1956 1957 1958 context_desc->vlan_macip_lens = cpu_to_le32(info); 1959 1960 tu_cmd |= (E1000_TXD_CMD_DEXT | E1000_ADVTXD_DTYP_CTXT); 1961 1962 if (skb->ip_summed == CHECKSUM_PARTIAL) { 1963 switch (skb->protocol) { 1964 case __constant_htons(ETH_P_IP): 1965 tu_cmd |= E1000_ADVTXD_TUCMD_IPV4; 1966 if (ip_hdr(skb)->protocol == IPPROTO_TCP) 1967 tu_cmd |= E1000_ADVTXD_TUCMD_L4T_TCP; 1968 break; 1969 case __constant_htons(ETH_P_IPV6): 1970 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP) 1971 tu_cmd |= E1000_ADVTXD_TUCMD_L4T_TCP; 1972 break; 1973 default: 1974 break; 1975 } 1976 } 1977 1978 context_desc->type_tucmd_mlhl = cpu_to_le32(tu_cmd); 1979 context_desc->seqnum_seed = 0; 1980 context_desc->mss_l4len_idx = 0; 1981 1982 buffer_info->time_stamp = jiffies; 1983 buffer_info->next_to_watch = i; 1984 buffer_info->dma = 0; 1985 i++; 1986 if (i == tx_ring->count) 1987 i = 0; 1988 tx_ring->next_to_use = i; 1989 1990 return true; 1991 } 1992 1993 return false; 1994} 1995 1996static int igbvf_maybe_stop_tx(struct net_device *netdev, int size) 1997{ 1998 struct igbvf_adapter *adapter = netdev_priv(netdev); 1999 2000 /* there is enough descriptors then we don't need to worry */ 2001 if (igbvf_desc_unused(adapter->tx_ring) >= size) 2002 return 0; 2003 2004 netif_stop_queue(netdev); 2005 2006 smp_mb(); 2007 2008 /* We need to check again just in case room has been made available */ 2009 if (igbvf_desc_unused(adapter->tx_ring) < size) 2010 return -EBUSY; 2011 2012 netif_wake_queue(netdev); 2013 2014 ++adapter->restart_queue; 2015 return 0; 2016} 2017 2018#define IGBVF_MAX_TXD_PWR 16 2019#define IGBVF_MAX_DATA_PER_TXD (1 << IGBVF_MAX_TXD_PWR) 2020 2021static inline int igbvf_tx_map_adv(struct igbvf_adapter *adapter, 2022 struct igbvf_ring *tx_ring, 2023 struct sk_buff *skb, 2024 unsigned int first) 2025{ 2026 struct igbvf_buffer *buffer_info; 2027 struct pci_dev *pdev = adapter->pdev; 2028 unsigned int len = skb_headlen(skb); 2029 unsigned int count = 0, i; 2030 unsigned int f; 2031 2032 i = tx_ring->next_to_use; 2033 2034 buffer_info = &tx_ring->buffer_info[i]; 2035 BUG_ON(len >= IGBVF_MAX_DATA_PER_TXD); 2036 buffer_info->length = len; 2037 /* set time_stamp *before* dma to help avoid a possible race */ 2038 buffer_info->time_stamp = jiffies; 2039 buffer_info->next_to_watch = i; 2040 buffer_info->mapped_as_page = false; 2041 buffer_info->dma = dma_map_single(&pdev->dev, skb->data, len, 2042 DMA_TO_DEVICE); 2043 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) 2044 goto dma_error; 2045 2046 2047 for (f = 0; f < skb_shinfo(skb)->nr_frags; f++) { 2048 const struct skb_frag_struct *frag; 2049 2050 count++; 2051 i++; 2052 if (i == tx_ring->count) 2053 i = 0; 2054 2055 frag = &skb_shinfo(skb)->frags[f]; 2056 len = skb_frag_size(frag); 2057 2058 buffer_info = &tx_ring->buffer_info[i]; 2059 BUG_ON(len >= IGBVF_MAX_DATA_PER_TXD); 2060 buffer_info->length = len; 2061 buffer_info->time_stamp = jiffies; 2062 buffer_info->next_to_watch = i; 2063 buffer_info->mapped_as_page = true; 2064 buffer_info->dma = skb_frag_dma_map(&pdev->dev, frag, 0, len, 2065 DMA_TO_DEVICE); 2066 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) 2067 goto dma_error; 2068 } 2069 2070 tx_ring->buffer_info[i].skb = skb; 2071 tx_ring->buffer_info[first].next_to_watch = i; 2072 2073 return ++count; 2074 2075dma_error: 2076 dev_err(&pdev->dev, "TX DMA map failed\n"); 2077 2078 /* clear timestamp and dma mappings for failed buffer_info mapping */ 2079 buffer_info->dma = 0; 2080 buffer_info->time_stamp = 0; 2081 buffer_info->length = 0; 2082 buffer_info->next_to_watch = 0; 2083 buffer_info->mapped_as_page = false; 2084 if (count) 2085 count--; 2086 2087 /* clear timestamp and dma mappings for remaining portion of packet */ 2088 while (count--) { 2089 if (i==0) 2090 i += tx_ring->count; 2091 i--; 2092 buffer_info = &tx_ring->buffer_info[i]; 2093 igbvf_put_txbuf(adapter, buffer_info); 2094 } 2095 2096 return 0; 2097} 2098 2099static inline void igbvf_tx_queue_adv(struct igbvf_adapter *adapter, 2100 struct igbvf_ring *tx_ring, 2101 int tx_flags, int count, u32 paylen, 2102 u8 hdr_len) 2103{ 2104 union e1000_adv_tx_desc *tx_desc = NULL; 2105 struct igbvf_buffer *buffer_info; 2106 u32 olinfo_status = 0, cmd_type_len; 2107 unsigned int i; 2108 2109 cmd_type_len = (E1000_ADVTXD_DTYP_DATA | E1000_ADVTXD_DCMD_IFCS | 2110 E1000_ADVTXD_DCMD_DEXT); 2111 2112 if (tx_flags & IGBVF_TX_FLAGS_VLAN) 2113 cmd_type_len |= E1000_ADVTXD_DCMD_VLE; 2114 2115 if (tx_flags & IGBVF_TX_FLAGS_TSO) { 2116 cmd_type_len |= E1000_ADVTXD_DCMD_TSE; 2117 2118 /* insert tcp checksum */ 2119 olinfo_status |= E1000_TXD_POPTS_TXSM << 8; 2120 2121 /* insert ip checksum */ 2122 if (tx_flags & IGBVF_TX_FLAGS_IPV4) 2123 olinfo_status |= E1000_TXD_POPTS_IXSM << 8; 2124 2125 } else if (tx_flags & IGBVF_TX_FLAGS_CSUM) { 2126 olinfo_status |= E1000_TXD_POPTS_TXSM << 8; 2127 } 2128 2129 olinfo_status |= ((paylen - hdr_len) << E1000_ADVTXD_PAYLEN_SHIFT); 2130 2131 i = tx_ring->next_to_use; 2132 while (count--) { 2133 buffer_info = &tx_ring->buffer_info[i]; 2134 tx_desc = IGBVF_TX_DESC_ADV(*tx_ring, i); 2135 tx_desc->read.buffer_addr = cpu_to_le64(buffer_info->dma); 2136 tx_desc->read.cmd_type_len = 2137 cpu_to_le32(cmd_type_len | buffer_info->length); 2138 tx_desc->read.olinfo_status = cpu_to_le32(olinfo_status); 2139 i++; 2140 if (i == tx_ring->count) 2141 i = 0; 2142 } 2143 2144 tx_desc->read.cmd_type_len |= cpu_to_le32(adapter->txd_cmd); 2145 /* Force memory writes to complete before letting h/w 2146 * know there are new descriptors to fetch. (Only 2147 * applicable for weak-ordered memory model archs, 2148 * such as IA-64). */ 2149 wmb(); 2150 2151 tx_ring->next_to_use = i; 2152 writel(i, adapter->hw.hw_addr + tx_ring->tail); 2153 /* we need this if more than one processor can write to our tail 2154 * at a time, it syncronizes IO on IA64/Altix systems */ 2155 mmiowb(); 2156} 2157 2158static netdev_tx_t igbvf_xmit_frame_ring_adv(struct sk_buff *skb, 2159 struct net_device *netdev, 2160 struct igbvf_ring *tx_ring) 2161{ 2162 struct igbvf_adapter *adapter = netdev_priv(netdev); 2163 unsigned int first, tx_flags = 0; 2164 u8 hdr_len = 0; 2165 int count = 0; 2166 int tso = 0; 2167 2168 if (test_bit(__IGBVF_DOWN, &adapter->state)) { 2169 dev_kfree_skb_any(skb); 2170 return NETDEV_TX_OK; 2171 } 2172 2173 if (skb->len <= 0) { 2174 dev_kfree_skb_any(skb); 2175 return NETDEV_TX_OK; 2176 } 2177 2178 /* 2179 * need: count + 4 desc gap to keep tail from touching 2180 * + 2 desc gap to keep tail from touching head, 2181 * + 1 desc for skb->data, 2182 * + 1 desc for context descriptor, 2183 * head, otherwise try next time 2184 */ 2185 if (igbvf_maybe_stop_tx(netdev, skb_shinfo(skb)->nr_frags + 4)) { 2186 /* this is a hard error */ 2187 return NETDEV_TX_BUSY; 2188 } 2189 2190 if (vlan_tx_tag_present(skb)) { 2191 tx_flags |= IGBVF_TX_FLAGS_VLAN; 2192 tx_flags |= (vlan_tx_tag_get(skb) << IGBVF_TX_FLAGS_VLAN_SHIFT); 2193 } 2194 2195 if (skb->protocol == htons(ETH_P_IP)) 2196 tx_flags |= IGBVF_TX_FLAGS_IPV4; 2197 2198 first = tx_ring->next_to_use; 2199 2200 tso = skb_is_gso(skb) ? 2201 igbvf_tso(adapter, tx_ring, skb, tx_flags, &hdr_len) : 0; 2202 if (unlikely(tso < 0)) { 2203 dev_kfree_skb_any(skb); 2204 return NETDEV_TX_OK; 2205 } 2206 2207 if (tso) 2208 tx_flags |= IGBVF_TX_FLAGS_TSO; 2209 else if (igbvf_tx_csum(adapter, tx_ring, skb, tx_flags) && 2210 (skb->ip_summed == CHECKSUM_PARTIAL)) 2211 tx_flags |= IGBVF_TX_FLAGS_CSUM; 2212 2213 /* 2214 * count reflects descriptors mapped, if 0 then mapping error 2215 * has occurred and we need to rewind the descriptor queue 2216 */ 2217 count = igbvf_tx_map_adv(adapter, tx_ring, skb, first); 2218 2219 if (count) { 2220 igbvf_tx_queue_adv(adapter, tx_ring, tx_flags, count, 2221 skb->len, hdr_len); 2222 /* Make sure there is space in the ring for the next send. */ 2223 igbvf_maybe_stop_tx(netdev, MAX_SKB_FRAGS + 4); 2224 } else { 2225 dev_kfree_skb_any(skb); 2226 tx_ring->buffer_info[first].time_stamp = 0; 2227 tx_ring->next_to_use = first; 2228 } 2229 2230 return NETDEV_TX_OK; 2231} 2232 2233static netdev_tx_t igbvf_xmit_frame(struct sk_buff *skb, 2234 struct net_device *netdev) 2235{ 2236 struct igbvf_adapter *adapter = netdev_priv(netdev); 2237 struct igbvf_ring *tx_ring; 2238 2239 if (test_bit(__IGBVF_DOWN, &adapter->state)) { 2240 dev_kfree_skb_any(skb); 2241 return NETDEV_TX_OK; 2242 } 2243 2244 tx_ring = &adapter->tx_ring[0]; 2245 2246 return igbvf_xmit_frame_ring_adv(skb, netdev, tx_ring); 2247} 2248 2249/** 2250 * igbvf_tx_timeout - Respond to a Tx Hang 2251 * @netdev: network interface device structure 2252 **/ 2253static void igbvf_tx_timeout(struct net_device *netdev) 2254{ 2255 struct igbvf_adapter *adapter = netdev_priv(netdev); 2256 2257 /* Do the reset outside of interrupt context */ 2258 adapter->tx_timeout_count++; 2259 schedule_work(&adapter->reset_task); 2260} 2261 2262static void igbvf_reset_task(struct work_struct *work) 2263{ 2264 struct igbvf_adapter *adapter; 2265 adapter = container_of(work, struct igbvf_adapter, reset_task); 2266 2267 igbvf_reinit_locked(adapter); 2268} 2269 2270/** 2271 * igbvf_get_stats - Get System Network Statistics 2272 * @netdev: network interface device structure 2273 * 2274 * Returns the address of the device statistics structure. 2275 * The statistics are actually updated from the timer callback. 2276 **/ 2277static struct net_device_stats *igbvf_get_stats(struct net_device *netdev) 2278{ 2279 struct igbvf_adapter *adapter = netdev_priv(netdev); 2280 2281 /* only return the current stats */ 2282 return &adapter->net_stats; 2283} 2284 2285/** 2286 * igbvf_change_mtu - Change the Maximum Transfer Unit 2287 * @netdev: network interface device structure 2288 * @new_mtu: new value for maximum frame size 2289 * 2290 * Returns 0 on success, negative on failure 2291 **/ 2292static int igbvf_change_mtu(struct net_device *netdev, int new_mtu) 2293{ 2294 struct igbvf_adapter *adapter = netdev_priv(netdev); 2295 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN; 2296 2297 if ((new_mtu < 68) || (max_frame > MAX_JUMBO_FRAME_SIZE)) { 2298 dev_err(&adapter->pdev->dev, "Invalid MTU setting\n"); 2299 return -EINVAL; 2300 } 2301 2302#define MAX_STD_JUMBO_FRAME_SIZE 9234 2303 if (max_frame > MAX_STD_JUMBO_FRAME_SIZE) { 2304 dev_err(&adapter->pdev->dev, "MTU > 9216 not supported.\n"); 2305 return -EINVAL; 2306 } 2307 2308 while (test_and_set_bit(__IGBVF_RESETTING, &adapter->state)) 2309 msleep(1); 2310 /* igbvf_down has a dependency on max_frame_size */ 2311 adapter->max_frame_size = max_frame; 2312 if (netif_running(netdev)) 2313 igbvf_down(adapter); 2314 2315 /* 2316 * NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN 2317 * means we reserve 2 more, this pushes us to allocate from the next 2318 * larger slab size. 2319 * i.e. RXBUFFER_2048 --> size-4096 slab 2320 * However with the new *_jumbo_rx* routines, jumbo receives will use 2321 * fragmented skbs 2322 */ 2323 2324 if (max_frame <= 1024) 2325 adapter->rx_buffer_len = 1024; 2326 else if (max_frame <= 2048) 2327 adapter->rx_buffer_len = 2048; 2328 else 2329#if (PAGE_SIZE / 2) > 16384 2330 adapter->rx_buffer_len = 16384; 2331#else 2332 adapter->rx_buffer_len = PAGE_SIZE / 2; 2333#endif 2334 2335 2336 /* adjust allocation if LPE protects us, and we aren't using SBP */ 2337 if ((max_frame == ETH_FRAME_LEN + ETH_FCS_LEN) || 2338 (max_frame == ETH_FRAME_LEN + VLAN_HLEN + ETH_FCS_LEN)) 2339 adapter->rx_buffer_len = ETH_FRAME_LEN + VLAN_HLEN + 2340 ETH_FCS_LEN; 2341 2342 dev_info(&adapter->pdev->dev, "changing MTU from %d to %d\n", 2343 netdev->mtu, new_mtu); 2344 netdev->mtu = new_mtu; 2345 2346 if (netif_running(netdev)) 2347 igbvf_up(adapter); 2348 else 2349 igbvf_reset(adapter); 2350 2351 clear_bit(__IGBVF_RESETTING, &adapter->state); 2352 2353 return 0; 2354} 2355 2356static int igbvf_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd) 2357{ 2358 switch (cmd) { 2359 default: 2360 return -EOPNOTSUPP; 2361 } 2362} 2363 2364static int igbvf_suspend(struct pci_dev *pdev, pm_message_t state) 2365{ 2366 struct net_device *netdev = pci_get_drvdata(pdev); 2367 struct igbvf_adapter *adapter = netdev_priv(netdev); 2368#ifdef CONFIG_PM 2369 int retval = 0; 2370#endif 2371 2372 netif_device_detach(netdev); 2373 2374 if (netif_running(netdev)) { 2375 WARN_ON(test_bit(__IGBVF_RESETTING, &adapter->state)); 2376 igbvf_down(adapter); 2377 igbvf_free_irq(adapter); 2378 } 2379 2380#ifdef CONFIG_PM 2381 retval = pci_save_state(pdev); 2382 if (retval) 2383 return retval; 2384#endif 2385 2386 pci_disable_device(pdev); 2387 2388 return 0; 2389} 2390 2391#ifdef CONFIG_PM 2392static int igbvf_resume(struct pci_dev *pdev) 2393{ 2394 struct net_device *netdev = pci_get_drvdata(pdev); 2395 struct igbvf_adapter *adapter = netdev_priv(netdev); 2396 u32 err; 2397 2398 pci_restore_state(pdev); 2399 err = pci_enable_device_mem(pdev); 2400 if (err) { 2401 dev_err(&pdev->dev, "Cannot enable PCI device from suspend\n"); 2402 return err; 2403 } 2404 2405 pci_set_master(pdev); 2406 2407 if (netif_running(netdev)) { 2408 err = igbvf_request_irq(adapter); 2409 if (err) 2410 return err; 2411 } 2412 2413 igbvf_reset(adapter); 2414 2415 if (netif_running(netdev)) 2416 igbvf_up(adapter); 2417 2418 netif_device_attach(netdev); 2419 2420 return 0; 2421} 2422#endif 2423 2424static void igbvf_shutdown(struct pci_dev *pdev) 2425{ 2426 igbvf_suspend(pdev, PMSG_SUSPEND); 2427} 2428 2429#ifdef CONFIG_NET_POLL_CONTROLLER 2430/* 2431 * Polling 'interrupt' - used by things like netconsole to send skbs 2432 * without having to re-enable interrupts. It's not called while 2433 * the interrupt routine is executing. 2434 */ 2435static void igbvf_netpoll(struct net_device *netdev) 2436{ 2437 struct igbvf_adapter *adapter = netdev_priv(netdev); 2438 2439 disable_irq(adapter->pdev->irq); 2440 2441 igbvf_clean_tx_irq(adapter->tx_ring); 2442 2443 enable_irq(adapter->pdev->irq); 2444} 2445#endif 2446 2447/** 2448 * igbvf_io_error_detected - called when PCI error is detected 2449 * @pdev: Pointer to PCI device 2450 * @state: The current pci connection state 2451 * 2452 * This function is called after a PCI bus error affecting 2453 * this device has been detected. 2454 */ 2455static pci_ers_result_t igbvf_io_error_detected(struct pci_dev *pdev, 2456 pci_channel_state_t state) 2457{ 2458 struct net_device *netdev = pci_get_drvdata(pdev); 2459 struct igbvf_adapter *adapter = netdev_priv(netdev); 2460 2461 netif_device_detach(netdev); 2462 2463 if (state == pci_channel_io_perm_failure) 2464 return PCI_ERS_RESULT_DISCONNECT; 2465 2466 if (netif_running(netdev)) 2467 igbvf_down(adapter); 2468 pci_disable_device(pdev); 2469 2470 /* Request a slot slot reset. */ 2471 return PCI_ERS_RESULT_NEED_RESET; 2472} 2473 2474/** 2475 * igbvf_io_slot_reset - called after the pci bus has been reset. 2476 * @pdev: Pointer to PCI device 2477 * 2478 * Restart the card from scratch, as if from a cold-boot. Implementation 2479 * resembles the first-half of the igbvf_resume routine. 2480 */ 2481static pci_ers_result_t igbvf_io_slot_reset(struct pci_dev *pdev) 2482{ 2483 struct net_device *netdev = pci_get_drvdata(pdev); 2484 struct igbvf_adapter *adapter = netdev_priv(netdev); 2485 2486 if (pci_enable_device_mem(pdev)) { 2487 dev_err(&pdev->dev, 2488 "Cannot re-enable PCI device after reset.\n"); 2489 return PCI_ERS_RESULT_DISCONNECT; 2490 } 2491 pci_set_master(pdev); 2492 2493 igbvf_reset(adapter); 2494 2495 return PCI_ERS_RESULT_RECOVERED; 2496} 2497 2498/** 2499 * igbvf_io_resume - called when traffic can start flowing again. 2500 * @pdev: Pointer to PCI device 2501 * 2502 * This callback is called when the error recovery driver tells us that 2503 * its OK to resume normal operation. Implementation resembles the 2504 * second-half of the igbvf_resume routine. 2505 */ 2506static void igbvf_io_resume(struct pci_dev *pdev) 2507{ 2508 struct net_device *netdev = pci_get_drvdata(pdev); 2509 struct igbvf_adapter *adapter = netdev_priv(netdev); 2510 2511 if (netif_running(netdev)) { 2512 if (igbvf_up(adapter)) { 2513 dev_err(&pdev->dev, 2514 "can't bring device back up after reset\n"); 2515 return; 2516 } 2517 } 2518 2519 netif_device_attach(netdev); 2520} 2521 2522static void igbvf_print_device_info(struct igbvf_adapter *adapter) 2523{ 2524 struct e1000_hw *hw = &adapter->hw; 2525 struct net_device *netdev = adapter->netdev; 2526 struct pci_dev *pdev = adapter->pdev; 2527 2528 if (hw->mac.type == e1000_vfadapt_i350) 2529 dev_info(&pdev->dev, "Intel(R) I350 Virtual Function\n"); 2530 else 2531 dev_info(&pdev->dev, "Intel(R) 82576 Virtual Function\n"); 2532 dev_info(&pdev->dev, "Address: %pM\n", netdev->dev_addr); 2533} 2534 2535static int igbvf_set_features(struct net_device *netdev, 2536 netdev_features_t features) 2537{ 2538 struct igbvf_adapter *adapter = netdev_priv(netdev); 2539 2540 if (features & NETIF_F_RXCSUM) 2541 adapter->flags &= ~IGBVF_FLAG_RX_CSUM_DISABLED; 2542 else 2543 adapter->flags |= IGBVF_FLAG_RX_CSUM_DISABLED; 2544 2545 return 0; 2546} 2547 2548static const struct net_device_ops igbvf_netdev_ops = { 2549 .ndo_open = igbvf_open, 2550 .ndo_stop = igbvf_close, 2551 .ndo_start_xmit = igbvf_xmit_frame, 2552 .ndo_get_stats = igbvf_get_stats, 2553 .ndo_set_rx_mode = igbvf_set_multi, 2554 .ndo_set_mac_address = igbvf_set_mac, 2555 .ndo_change_mtu = igbvf_change_mtu, 2556 .ndo_do_ioctl = igbvf_ioctl, 2557 .ndo_tx_timeout = igbvf_tx_timeout, 2558 .ndo_vlan_rx_add_vid = igbvf_vlan_rx_add_vid, 2559 .ndo_vlan_rx_kill_vid = igbvf_vlan_rx_kill_vid, 2560#ifdef CONFIG_NET_POLL_CONTROLLER 2561 .ndo_poll_controller = igbvf_netpoll, 2562#endif 2563 .ndo_set_features = igbvf_set_features, 2564}; 2565 2566/** 2567 * igbvf_probe - Device Initialization Routine 2568 * @pdev: PCI device information struct 2569 * @ent: entry in igbvf_pci_tbl 2570 * 2571 * Returns 0 on success, negative on failure 2572 * 2573 * igbvf_probe initializes an adapter identified by a pci_dev structure. 2574 * The OS initialization, configuring of the adapter private structure, 2575 * and a hardware reset occur. 2576 **/ 2577static int __devinit igbvf_probe(struct pci_dev *pdev, 2578 const struct pci_device_id *ent) 2579{ 2580 struct net_device *netdev; 2581 struct igbvf_adapter *adapter; 2582 struct e1000_hw *hw; 2583 const struct igbvf_info *ei = igbvf_info_tbl[ent->driver_data]; 2584 2585 static int cards_found; 2586 int err, pci_using_dac; 2587 2588 err = pci_enable_device_mem(pdev); 2589 if (err) 2590 return err; 2591 2592 pci_using_dac = 0; 2593 err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(64)); 2594 if (!err) { 2595 err = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64)); 2596 if (!err) 2597 pci_using_dac = 1; 2598 } else { 2599 err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32)); 2600 if (err) { 2601 err = dma_set_coherent_mask(&pdev->dev, 2602 DMA_BIT_MASK(32)); 2603 if (err) { 2604 dev_err(&pdev->dev, "No usable DMA " 2605 "configuration, aborting\n"); 2606 goto err_dma; 2607 } 2608 } 2609 } 2610 2611 err = pci_request_regions(pdev, igbvf_driver_name); 2612 if (err) 2613 goto err_pci_reg; 2614 2615 pci_set_master(pdev); 2616 2617 err = -ENOMEM; 2618 netdev = alloc_etherdev(sizeof(struct igbvf_adapter)); 2619 if (!netdev) 2620 goto err_alloc_etherdev; 2621 2622 SET_NETDEV_DEV(netdev, &pdev->dev); 2623 2624 pci_set_drvdata(pdev, netdev); 2625 adapter = netdev_priv(netdev); 2626 hw = &adapter->hw; 2627 adapter->netdev = netdev; 2628 adapter->pdev = pdev; 2629 adapter->ei = ei; 2630 adapter->pba = ei->pba; 2631 adapter->flags = ei->flags; 2632 adapter->hw.back = adapter; 2633 adapter->hw.mac.type = ei->mac; 2634 adapter->msg_enable = (1 << NETIF_MSG_DRV | NETIF_MSG_PROBE) - 1; 2635 2636 /* PCI config space info */ 2637 2638 hw->vendor_id = pdev->vendor; 2639 hw->device_id = pdev->device; 2640 hw->subsystem_vendor_id = pdev->subsystem_vendor; 2641 hw->subsystem_device_id = pdev->subsystem_device; 2642 hw->revision_id = pdev->revision; 2643 2644 err = -EIO; 2645 adapter->hw.hw_addr = ioremap(pci_resource_start(pdev, 0), 2646 pci_resource_len(pdev, 0)); 2647 2648 if (!adapter->hw.hw_addr) 2649 goto err_ioremap; 2650 2651 if (ei->get_variants) { 2652 err = ei->get_variants(adapter); 2653 if (err) 2654 goto err_ioremap; 2655 } 2656 2657 /* setup adapter struct */ 2658 err = igbvf_sw_init(adapter); 2659 if (err) 2660 goto err_sw_init; 2661 2662 /* construct the net_device struct */ 2663 netdev->netdev_ops = &igbvf_netdev_ops; 2664 2665 igbvf_set_ethtool_ops(netdev); 2666 netdev->watchdog_timeo = 5 * HZ; 2667 strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1); 2668 2669 adapter->bd_number = cards_found++; 2670 2671 netdev->hw_features = NETIF_F_SG | 2672 NETIF_F_IP_CSUM | 2673 NETIF_F_IPV6_CSUM | 2674 NETIF_F_TSO | 2675 NETIF_F_TSO6 | 2676 NETIF_F_RXCSUM; 2677 2678 netdev->features = netdev->hw_features | 2679 NETIF_F_HW_VLAN_TX | 2680 NETIF_F_HW_VLAN_RX | 2681 NETIF_F_HW_VLAN_FILTER; 2682 2683 if (pci_using_dac) 2684 netdev->features |= NETIF_F_HIGHDMA; 2685 2686 netdev->vlan_features |= NETIF_F_TSO; 2687 netdev->vlan_features |= NETIF_F_TSO6; 2688 netdev->vlan_features |= NETIF_F_IP_CSUM; 2689 netdev->vlan_features |= NETIF_F_IPV6_CSUM; 2690 netdev->vlan_features |= NETIF_F_SG; 2691 2692 /*reset the controller to put the device in a known good state */ 2693 err = hw->mac.ops.reset_hw(hw); 2694 if (err) { 2695 dev_info(&pdev->dev, 2696 "PF still in reset state, assigning new address." 2697 " Is the PF interface up?\n"); 2698 dev_hw_addr_random(adapter->netdev, hw->mac.addr); 2699 } else { 2700 err = hw->mac.ops.read_mac_addr(hw); 2701 if (err) { 2702 dev_err(&pdev->dev, "Error reading MAC address\n"); 2703 goto err_hw_init; 2704 } 2705 } 2706 2707 memcpy(netdev->dev_addr, adapter->hw.mac.addr, netdev->addr_len); 2708 memcpy(netdev->perm_addr, adapter->hw.mac.addr, netdev->addr_len); 2709 2710 if (!is_valid_ether_addr(netdev->perm_addr)) { 2711 dev_err(&pdev->dev, "Invalid MAC Address: %pM\n", 2712 netdev->dev_addr); 2713 err = -EIO; 2714 goto err_hw_init; 2715 } 2716 2717 setup_timer(&adapter->watchdog_timer, &igbvf_watchdog, 2718 (unsigned long) adapter); 2719 2720 INIT_WORK(&adapter->reset_task, igbvf_reset_task); 2721 INIT_WORK(&adapter->watchdog_task, igbvf_watchdog_task); 2722 2723 /* ring size defaults */ 2724 adapter->rx_ring->count = 1024; 2725 adapter->tx_ring->count = 1024; 2726 2727 /* reset the hardware with the new settings */ 2728 igbvf_reset(adapter); 2729 2730 strcpy(netdev->name, "eth%d"); 2731 err = register_netdev(netdev); 2732 if (err) 2733 goto err_hw_init; 2734 2735 /* tell the stack to leave us alone until igbvf_open() is called */ 2736 netif_carrier_off(netdev); 2737 netif_stop_queue(netdev); 2738 2739 igbvf_print_device_info(adapter); 2740 2741 igbvf_initialize_last_counter_stats(adapter); 2742 2743 return 0; 2744 2745err_hw_init: 2746 kfree(adapter->tx_ring); 2747 kfree(adapter->rx_ring); 2748err_sw_init: 2749 igbvf_reset_interrupt_capability(adapter); 2750 iounmap(adapter->hw.hw_addr); 2751err_ioremap: 2752 free_netdev(netdev); 2753err_alloc_etherdev: 2754 pci_release_regions(pdev); 2755err_pci_reg: 2756err_dma: 2757 pci_disable_device(pdev); 2758 return err; 2759} 2760 2761/** 2762 * igbvf_remove - Device Removal Routine 2763 * @pdev: PCI device information struct 2764 * 2765 * igbvf_remove is called by the PCI subsystem to alert the driver 2766 * that it should release a PCI device. The could be caused by a 2767 * Hot-Plug event, or because the driver is going to be removed from 2768 * memory. 2769 **/ 2770static void __devexit igbvf_remove(struct pci_dev *pdev) 2771{ 2772 struct net_device *netdev = pci_get_drvdata(pdev); 2773 struct igbvf_adapter *adapter = netdev_priv(netdev); 2774 struct e1000_hw *hw = &adapter->hw; 2775 2776 /* 2777 * The watchdog timer may be rescheduled, so explicitly 2778 * disable it from being rescheduled. 2779 */ 2780 set_bit(__IGBVF_DOWN, &adapter->state); 2781 del_timer_sync(&adapter->watchdog_timer); 2782 2783 cancel_work_sync(&adapter->reset_task); 2784 cancel_work_sync(&adapter->watchdog_task); 2785 2786 unregister_netdev(netdev); 2787 2788 igbvf_reset_interrupt_capability(adapter); 2789 2790 /* 2791 * it is important to delete the napi struct prior to freeing the 2792 * rx ring so that you do not end up with null pointer refs 2793 */ 2794 netif_napi_del(&adapter->rx_ring->napi); 2795 kfree(adapter->tx_ring); 2796 kfree(adapter->rx_ring); 2797 2798 iounmap(hw->hw_addr); 2799 if (hw->flash_address) 2800 iounmap(hw->flash_address); 2801 pci_release_regions(pdev); 2802 2803 free_netdev(netdev); 2804 2805 pci_disable_device(pdev); 2806} 2807 2808/* PCI Error Recovery (ERS) */ 2809static struct pci_error_handlers igbvf_err_handler = { 2810 .error_detected = igbvf_io_error_detected, 2811 .slot_reset = igbvf_io_slot_reset, 2812 .resume = igbvf_io_resume, 2813}; 2814 2815static DEFINE_PCI_DEVICE_TABLE(igbvf_pci_tbl) = { 2816 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82576_VF), board_vf }, 2817 { PCI_VDEVICE(INTEL, E1000_DEV_ID_I350_VF), board_i350_vf }, 2818 { } /* terminate list */ 2819}; 2820MODULE_DEVICE_TABLE(pci, igbvf_pci_tbl); 2821 2822/* PCI Device API Driver */ 2823static struct pci_driver igbvf_driver = { 2824 .name = igbvf_driver_name, 2825 .id_table = igbvf_pci_tbl, 2826 .probe = igbvf_probe, 2827 .remove = __devexit_p(igbvf_remove), 2828#ifdef CONFIG_PM 2829 /* Power Management Hooks */ 2830 .suspend = igbvf_suspend, 2831 .resume = igbvf_resume, 2832#endif 2833 .shutdown = igbvf_shutdown, 2834 .err_handler = &igbvf_err_handler 2835}; 2836 2837/** 2838 * igbvf_init_module - Driver Registration Routine 2839 * 2840 * igbvf_init_module is the first routine called when the driver is 2841 * loaded. All it does is register with the PCI subsystem. 2842 **/ 2843static int __init igbvf_init_module(void) 2844{ 2845 int ret; 2846 pr_info("%s - version %s\n", igbvf_driver_string, igbvf_driver_version); 2847 pr_info("%s\n", igbvf_copyright); 2848 2849 ret = pci_register_driver(&igbvf_driver); 2850 2851 return ret; 2852} 2853module_init(igbvf_init_module); 2854 2855/** 2856 * igbvf_exit_module - Driver Exit Cleanup Routine 2857 * 2858 * igbvf_exit_module is called just before the driver is removed 2859 * from memory. 2860 **/ 2861static void __exit igbvf_exit_module(void) 2862{ 2863 pci_unregister_driver(&igbvf_driver); 2864} 2865module_exit(igbvf_exit_module); 2866 2867 2868MODULE_AUTHOR("Intel Corporation, <e1000-devel@lists.sourceforge.net>"); 2869MODULE_DESCRIPTION("Intel(R) Gigabit Virtual Function Network Driver"); 2870MODULE_LICENSE("GPL"); 2871MODULE_VERSION(DRV_VERSION); 2872 2873/* netdev.c */ 2874