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 "2.0.2-k" 51 char igbvf_driver_name[] = "igbvf"; 52 const char igbvf_driver_version[] = DRV_VERSION; 53 static const char igbvf_driver_string[] = 54 "Intel(R) Gigabit Virtual Function Network Driver"; 55 static const char igbvf_copyright[] = 56 "Copyright (c) 2009 - 2012 Intel Corporation."; 57 58 #define DEFAULT_MSG_ENABLE (NETIF_MSG_DRV|NETIF_MSG_PROBE|NETIF_MSG_LINK) 59 static int debug = -1; 60 module_param(debug, int, 0); 61 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)"); 62 63 static int igbvf_poll(struct napi_struct *napi, int budget); 64 static void igbvf_reset(struct igbvf_adapter *); 65 static void igbvf_set_interrupt_capability(struct igbvf_adapter *); 66 static void igbvf_reset_interrupt_capability(struct igbvf_adapter *); 67 68 static struct igbvf_info igbvf_vf_info = { 69 .mac = e1000_vfadapt, 70 .flags = 0, 71 .pba = 10, 72 .init_ops = e1000_init_function_pointers_vf, 73 }; 74 75 static struct igbvf_info igbvf_i350_vf_info = { 76 .mac = e1000_vfadapt_i350, 77 .flags = 0, 78 .pba = 10, 79 .init_ops = e1000_init_function_pointers_vf, 80 }; 81 82 static const struct igbvf_info *igbvf_info_tbl[] = { 83 [board_vf] = &igbvf_vf_info, 84 [board_i350_vf] = &igbvf_i350_vf_info, 85 }; 86 87 /** 88 * igbvf_desc_unused - calculate if we have unused descriptors 89 **/ 90 static int igbvf_desc_unused(struct igbvf_ring *ring) 91 { 92 if (ring->next_to_clean > ring->next_to_use) 93 return ring->next_to_clean - ring->next_to_use - 1; 94 95 return ring->count + ring->next_to_clean - ring->next_to_use - 1; 96 } 97 98 /** 99 * igbvf_receive_skb - helper function to handle Rx indications 100 * @adapter: board private structure 101 * @status: descriptor status field as written by hardware 102 * @vlan: descriptor vlan field as written by hardware (no le/be conversion) 103 * @skb: pointer to sk_buff to be indicated to stack 104 **/ 105 static void igbvf_receive_skb(struct igbvf_adapter *adapter, 106 struct net_device *netdev, 107 struct sk_buff *skb, 108 u32 status, u16 vlan) 109 { 110 u16 vid; 111 112 if (status & E1000_RXD_STAT_VP) { 113 if ((adapter->flags & IGBVF_FLAG_RX_LB_VLAN_BSWAP) && 114 (status & E1000_RXDEXT_STATERR_LB)) 115 vid = be16_to_cpu(vlan) & E1000_RXD_SPC_VLAN_MASK; 116 else 117 vid = le16_to_cpu(vlan) & E1000_RXD_SPC_VLAN_MASK; 118 if (test_bit(vid, adapter->active_vlans)) 119 __vlan_hwaccel_put_tag(skb, vid); 120 } 121 122 napi_gro_receive(&adapter->rx_ring->napi, skb); 123 } 124 125 static inline void igbvf_rx_checksum_adv(struct igbvf_adapter *adapter, 126 u32 status_err, struct sk_buff *skb) 127 { 128 skb_checksum_none_assert(skb); 129 130 /* Ignore Checksum bit is set or checksum is disabled through ethtool */ 131 if ((status_err & E1000_RXD_STAT_IXSM) || 132 (adapter->flags & IGBVF_FLAG_RX_CSUM_DISABLED)) 133 return; 134 135 /* TCP/UDP checksum error bit is set */ 136 if (status_err & 137 (E1000_RXDEXT_STATERR_TCPE | E1000_RXDEXT_STATERR_IPE)) { 138 /* let the stack verify checksum errors */ 139 adapter->hw_csum_err++; 140 return; 141 } 142 143 /* It must be a TCP or UDP packet with a valid checksum */ 144 if (status_err & (E1000_RXD_STAT_TCPCS | E1000_RXD_STAT_UDPCS)) 145 skb->ip_summed = CHECKSUM_UNNECESSARY; 146 147 adapter->hw_csum_good++; 148 } 149 150 /** 151 * igbvf_alloc_rx_buffers - Replace used receive buffers; packet split 152 * @rx_ring: address of ring structure to repopulate 153 * @cleaned_count: number of buffers to repopulate 154 **/ 155 static void igbvf_alloc_rx_buffers(struct igbvf_ring *rx_ring, 156 int cleaned_count) 157 { 158 struct igbvf_adapter *adapter = rx_ring->adapter; 159 struct net_device *netdev = adapter->netdev; 160 struct pci_dev *pdev = adapter->pdev; 161 union e1000_adv_rx_desc *rx_desc; 162 struct igbvf_buffer *buffer_info; 163 struct sk_buff *skb; 164 unsigned int i; 165 int bufsz; 166 167 i = rx_ring->next_to_use; 168 buffer_info = &rx_ring->buffer_info[i]; 169 170 if (adapter->rx_ps_hdr_size) 171 bufsz = adapter->rx_ps_hdr_size; 172 else 173 bufsz = adapter->rx_buffer_len; 174 175 while (cleaned_count--) { 176 rx_desc = IGBVF_RX_DESC_ADV(*rx_ring, i); 177 178 if (adapter->rx_ps_hdr_size && !buffer_info->page_dma) { 179 if (!buffer_info->page) { 180 buffer_info->page = alloc_page(GFP_ATOMIC); 181 if (!buffer_info->page) { 182 adapter->alloc_rx_buff_failed++; 183 goto no_buffers; 184 } 185 buffer_info->page_offset = 0; 186 } else { 187 buffer_info->page_offset ^= PAGE_SIZE / 2; 188 } 189 buffer_info->page_dma = 190 dma_map_page(&pdev->dev, buffer_info->page, 191 buffer_info->page_offset, 192 PAGE_SIZE / 2, 193 DMA_FROM_DEVICE); 194 if (dma_mapping_error(&pdev->dev, 195 buffer_info->page_dma)) { 196 __free_page(buffer_info->page); 197 buffer_info->page = NULL; 198 dev_err(&pdev->dev, "RX DMA map failed\n"); 199 break; 200 } 201 } 202 203 if (!buffer_info->skb) { 204 skb = netdev_alloc_skb_ip_align(netdev, bufsz); 205 if (!skb) { 206 adapter->alloc_rx_buff_failed++; 207 goto no_buffers; 208 } 209 210 buffer_info->skb = skb; 211 buffer_info->dma = dma_map_single(&pdev->dev, skb->data, 212 bufsz, 213 DMA_FROM_DEVICE); 214 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) { 215 dev_kfree_skb(buffer_info->skb); 216 buffer_info->skb = NULL; 217 dev_err(&pdev->dev, "RX DMA map failed\n"); 218 goto no_buffers; 219 } 220 } 221 /* Refresh the desc even if buffer_addrs didn't change because 222 * each write-back erases this info. */ 223 if (adapter->rx_ps_hdr_size) { 224 rx_desc->read.pkt_addr = 225 cpu_to_le64(buffer_info->page_dma); 226 rx_desc->read.hdr_addr = cpu_to_le64(buffer_info->dma); 227 } else { 228 rx_desc->read.pkt_addr = 229 cpu_to_le64(buffer_info->dma); 230 rx_desc->read.hdr_addr = 0; 231 } 232 233 i++; 234 if (i == rx_ring->count) 235 i = 0; 236 buffer_info = &rx_ring->buffer_info[i]; 237 } 238 239 no_buffers: 240 if (rx_ring->next_to_use != i) { 241 rx_ring->next_to_use = i; 242 if (i == 0) 243 i = (rx_ring->count - 1); 244 else 245 i--; 246 247 /* Force memory writes to complete before letting h/w 248 * know there are new descriptors to fetch. (Only 249 * applicable for weak-ordered memory model archs, 250 * such as IA-64). */ 251 wmb(); 252 writel(i, adapter->hw.hw_addr + rx_ring->tail); 253 } 254 } 255 256 /** 257 * igbvf_clean_rx_irq - Send received data up the network stack; legacy 258 * @adapter: board private structure 259 * 260 * the return value indicates whether actual cleaning was done, there 261 * is no guarantee that everything was cleaned 262 **/ 263 static bool igbvf_clean_rx_irq(struct igbvf_adapter *adapter, 264 int *work_done, int work_to_do) 265 { 266 struct igbvf_ring *rx_ring = adapter->rx_ring; 267 struct net_device *netdev = adapter->netdev; 268 struct pci_dev *pdev = adapter->pdev; 269 union e1000_adv_rx_desc *rx_desc, *next_rxd; 270 struct igbvf_buffer *buffer_info, *next_buffer; 271 struct sk_buff *skb; 272 bool cleaned = false; 273 int cleaned_count = 0; 274 unsigned int total_bytes = 0, total_packets = 0; 275 unsigned int i; 276 u32 length, hlen, staterr; 277 278 i = rx_ring->next_to_clean; 279 rx_desc = IGBVF_RX_DESC_ADV(*rx_ring, i); 280 staterr = le32_to_cpu(rx_desc->wb.upper.status_error); 281 282 while (staterr & E1000_RXD_STAT_DD) { 283 if (*work_done >= work_to_do) 284 break; 285 (*work_done)++; 286 rmb(); /* read descriptor and rx_buffer_info after status DD */ 287 288 buffer_info = &rx_ring->buffer_info[i]; 289 290 /* HW will not DMA in data larger than the given buffer, even 291 * if it parses the (NFS, of course) header to be larger. In 292 * that case, it fills the header buffer and spills the rest 293 * into the page. 294 */ 295 hlen = (le16_to_cpu(rx_desc->wb.lower.lo_dword.hs_rss.hdr_info) & 296 E1000_RXDADV_HDRBUFLEN_MASK) >> E1000_RXDADV_HDRBUFLEN_SHIFT; 297 if (hlen > adapter->rx_ps_hdr_size) 298 hlen = adapter->rx_ps_hdr_size; 299 300 length = le16_to_cpu(rx_desc->wb.upper.length); 301 cleaned = true; 302 cleaned_count++; 303 304 skb = buffer_info->skb; 305 prefetch(skb->data - NET_IP_ALIGN); 306 buffer_info->skb = NULL; 307 if (!adapter->rx_ps_hdr_size) { 308 dma_unmap_single(&pdev->dev, buffer_info->dma, 309 adapter->rx_buffer_len, 310 DMA_FROM_DEVICE); 311 buffer_info->dma = 0; 312 skb_put(skb, length); 313 goto send_up; 314 } 315 316 if (!skb_shinfo(skb)->nr_frags) { 317 dma_unmap_single(&pdev->dev, buffer_info->dma, 318 adapter->rx_ps_hdr_size, 319 DMA_FROM_DEVICE); 320 skb_put(skb, hlen); 321 } 322 323 if (length) { 324 dma_unmap_page(&pdev->dev, buffer_info->page_dma, 325 PAGE_SIZE / 2, 326 DMA_FROM_DEVICE); 327 buffer_info->page_dma = 0; 328 329 skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags, 330 buffer_info->page, 331 buffer_info->page_offset, 332 length); 333 334 if ((adapter->rx_buffer_len > (PAGE_SIZE / 2)) || 335 (page_count(buffer_info->page) != 1)) 336 buffer_info->page = NULL; 337 else 338 get_page(buffer_info->page); 339 340 skb->len += length; 341 skb->data_len += length; 342 skb->truesize += PAGE_SIZE / 2; 343 } 344 send_up: 345 i++; 346 if (i == rx_ring->count) 347 i = 0; 348 next_rxd = IGBVF_RX_DESC_ADV(*rx_ring, i); 349 prefetch(next_rxd); 350 next_buffer = &rx_ring->buffer_info[i]; 351 352 if (!(staterr & E1000_RXD_STAT_EOP)) { 353 buffer_info->skb = next_buffer->skb; 354 buffer_info->dma = next_buffer->dma; 355 next_buffer->skb = skb; 356 next_buffer->dma = 0; 357 goto next_desc; 358 } 359 360 if (staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK) { 361 dev_kfree_skb_irq(skb); 362 goto next_desc; 363 } 364 365 total_bytes += skb->len; 366 total_packets++; 367 368 igbvf_rx_checksum_adv(adapter, staterr, skb); 369 370 skb->protocol = eth_type_trans(skb, netdev); 371 372 igbvf_receive_skb(adapter, netdev, skb, staterr, 373 rx_desc->wb.upper.vlan); 374 375 next_desc: 376 rx_desc->wb.upper.status_error = 0; 377 378 /* return some buffers to hardware, one at a time is too slow */ 379 if (cleaned_count >= IGBVF_RX_BUFFER_WRITE) { 380 igbvf_alloc_rx_buffers(rx_ring, cleaned_count); 381 cleaned_count = 0; 382 } 383 384 /* use prefetched values */ 385 rx_desc = next_rxd; 386 buffer_info = next_buffer; 387 388 staterr = le32_to_cpu(rx_desc->wb.upper.status_error); 389 } 390 391 rx_ring->next_to_clean = i; 392 cleaned_count = igbvf_desc_unused(rx_ring); 393 394 if (cleaned_count) 395 igbvf_alloc_rx_buffers(rx_ring, cleaned_count); 396 397 adapter->total_rx_packets += total_packets; 398 adapter->total_rx_bytes += total_bytes; 399 adapter->net_stats.rx_bytes += total_bytes; 400 adapter->net_stats.rx_packets += total_packets; 401 return cleaned; 402 } 403 404 static void igbvf_put_txbuf(struct igbvf_adapter *adapter, 405 struct igbvf_buffer *buffer_info) 406 { 407 if (buffer_info->dma) { 408 if (buffer_info->mapped_as_page) 409 dma_unmap_page(&adapter->pdev->dev, 410 buffer_info->dma, 411 buffer_info->length, 412 DMA_TO_DEVICE); 413 else 414 dma_unmap_single(&adapter->pdev->dev, 415 buffer_info->dma, 416 buffer_info->length, 417 DMA_TO_DEVICE); 418 buffer_info->dma = 0; 419 } 420 if (buffer_info->skb) { 421 dev_kfree_skb_any(buffer_info->skb); 422 buffer_info->skb = NULL; 423 } 424 buffer_info->time_stamp = 0; 425 } 426 427 /** 428 * igbvf_setup_tx_resources - allocate Tx resources (Descriptors) 429 * @adapter: board private structure 430 * 431 * Return 0 on success, negative on failure 432 **/ 433 int igbvf_setup_tx_resources(struct igbvf_adapter *adapter, 434 struct igbvf_ring *tx_ring) 435 { 436 struct pci_dev *pdev = adapter->pdev; 437 int size; 438 439 size = sizeof(struct igbvf_buffer) * tx_ring->count; 440 tx_ring->buffer_info = vzalloc(size); 441 if (!tx_ring->buffer_info) 442 goto err; 443 444 /* round up to nearest 4K */ 445 tx_ring->size = tx_ring->count * sizeof(union e1000_adv_tx_desc); 446 tx_ring->size = ALIGN(tx_ring->size, 4096); 447 448 tx_ring->desc = dma_alloc_coherent(&pdev->dev, tx_ring->size, 449 &tx_ring->dma, GFP_KERNEL); 450 if (!tx_ring->desc) 451 goto err; 452 453 tx_ring->adapter = adapter; 454 tx_ring->next_to_use = 0; 455 tx_ring->next_to_clean = 0; 456 457 return 0; 458 err: 459 vfree(tx_ring->buffer_info); 460 dev_err(&adapter->pdev->dev, 461 "Unable to allocate memory for the transmit descriptor ring\n"); 462 return -ENOMEM; 463 } 464 465 /** 466 * igbvf_setup_rx_resources - allocate Rx resources (Descriptors) 467 * @adapter: board private structure 468 * 469 * Returns 0 on success, negative on failure 470 **/ 471 int igbvf_setup_rx_resources(struct igbvf_adapter *adapter, 472 struct igbvf_ring *rx_ring) 473 { 474 struct pci_dev *pdev = adapter->pdev; 475 int size, desc_len; 476 477 size = sizeof(struct igbvf_buffer) * rx_ring->count; 478 rx_ring->buffer_info = vzalloc(size); 479 if (!rx_ring->buffer_info) 480 goto err; 481 482 desc_len = sizeof(union e1000_adv_rx_desc); 483 484 /* Round up to nearest 4K */ 485 rx_ring->size = rx_ring->count * desc_len; 486 rx_ring->size = ALIGN(rx_ring->size, 4096); 487 488 rx_ring->desc = dma_alloc_coherent(&pdev->dev, rx_ring->size, 489 &rx_ring->dma, GFP_KERNEL); 490 if (!rx_ring->desc) 491 goto err; 492 493 rx_ring->next_to_clean = 0; 494 rx_ring->next_to_use = 0; 495 496 rx_ring->adapter = adapter; 497 498 return 0; 499 500 err: 501 vfree(rx_ring->buffer_info); 502 rx_ring->buffer_info = NULL; 503 dev_err(&adapter->pdev->dev, 504 "Unable to allocate memory for the receive descriptor ring\n"); 505 return -ENOMEM; 506 } 507 508 /** 509 * igbvf_clean_tx_ring - Free Tx Buffers 510 * @tx_ring: ring to be cleaned 511 **/ 512 static void igbvf_clean_tx_ring(struct igbvf_ring *tx_ring) 513 { 514 struct igbvf_adapter *adapter = tx_ring->adapter; 515 struct igbvf_buffer *buffer_info; 516 unsigned long size; 517 unsigned int i; 518 519 if (!tx_ring->buffer_info) 520 return; 521 522 /* Free all the Tx ring sk_buffs */ 523 for (i = 0; i < tx_ring->count; i++) { 524 buffer_info = &tx_ring->buffer_info[i]; 525 igbvf_put_txbuf(adapter, buffer_info); 526 } 527 528 size = sizeof(struct igbvf_buffer) * tx_ring->count; 529 memset(tx_ring->buffer_info, 0, size); 530 531 /* Zero out the descriptor ring */ 532 memset(tx_ring->desc, 0, tx_ring->size); 533 534 tx_ring->next_to_use = 0; 535 tx_ring->next_to_clean = 0; 536 537 writel(0, adapter->hw.hw_addr + tx_ring->head); 538 writel(0, adapter->hw.hw_addr + tx_ring->tail); 539 } 540 541 /** 542 * igbvf_free_tx_resources - Free Tx Resources per Queue 543 * @tx_ring: ring to free resources from 544 * 545 * Free all transmit software resources 546 **/ 547 void igbvf_free_tx_resources(struct igbvf_ring *tx_ring) 548 { 549 struct pci_dev *pdev = tx_ring->adapter->pdev; 550 551 igbvf_clean_tx_ring(tx_ring); 552 553 vfree(tx_ring->buffer_info); 554 tx_ring->buffer_info = NULL; 555 556 dma_free_coherent(&pdev->dev, tx_ring->size, tx_ring->desc, 557 tx_ring->dma); 558 559 tx_ring->desc = NULL; 560 } 561 562 /** 563 * igbvf_clean_rx_ring - Free Rx Buffers per Queue 564 * @adapter: board private structure 565 **/ 566 static void igbvf_clean_rx_ring(struct igbvf_ring *rx_ring) 567 { 568 struct igbvf_adapter *adapter = rx_ring->adapter; 569 struct igbvf_buffer *buffer_info; 570 struct pci_dev *pdev = adapter->pdev; 571 unsigned long size; 572 unsigned int i; 573 574 if (!rx_ring->buffer_info) 575 return; 576 577 /* Free all the Rx ring sk_buffs */ 578 for (i = 0; i < rx_ring->count; i++) { 579 buffer_info = &rx_ring->buffer_info[i]; 580 if (buffer_info->dma) { 581 if (adapter->rx_ps_hdr_size){ 582 dma_unmap_single(&pdev->dev, buffer_info->dma, 583 adapter->rx_ps_hdr_size, 584 DMA_FROM_DEVICE); 585 } else { 586 dma_unmap_single(&pdev->dev, buffer_info->dma, 587 adapter->rx_buffer_len, 588 DMA_FROM_DEVICE); 589 } 590 buffer_info->dma = 0; 591 } 592 593 if (buffer_info->skb) { 594 dev_kfree_skb(buffer_info->skb); 595 buffer_info->skb = NULL; 596 } 597 598 if (buffer_info->page) { 599 if (buffer_info->page_dma) 600 dma_unmap_page(&pdev->dev, 601 buffer_info->page_dma, 602 PAGE_SIZE / 2, 603 DMA_FROM_DEVICE); 604 put_page(buffer_info->page); 605 buffer_info->page = NULL; 606 buffer_info->page_dma = 0; 607 buffer_info->page_offset = 0; 608 } 609 } 610 611 size = sizeof(struct igbvf_buffer) * rx_ring->count; 612 memset(rx_ring->buffer_info, 0, size); 613 614 /* Zero out the descriptor ring */ 615 memset(rx_ring->desc, 0, rx_ring->size); 616 617 rx_ring->next_to_clean = 0; 618 rx_ring->next_to_use = 0; 619 620 writel(0, adapter->hw.hw_addr + rx_ring->head); 621 writel(0, adapter->hw.hw_addr + rx_ring->tail); 622 } 623 624 /** 625 * igbvf_free_rx_resources - Free Rx Resources 626 * @rx_ring: ring to clean the resources from 627 * 628 * Free all receive software resources 629 **/ 630 631 void igbvf_free_rx_resources(struct igbvf_ring *rx_ring) 632 { 633 struct pci_dev *pdev = rx_ring->adapter->pdev; 634 635 igbvf_clean_rx_ring(rx_ring); 636 637 vfree(rx_ring->buffer_info); 638 rx_ring->buffer_info = NULL; 639 640 dma_free_coherent(&pdev->dev, rx_ring->size, rx_ring->desc, 641 rx_ring->dma); 642 rx_ring->desc = NULL; 643 } 644 645 /** 646 * igbvf_update_itr - update the dynamic ITR value based on statistics 647 * @adapter: pointer to adapter 648 * @itr_setting: current adapter->itr 649 * @packets: the number of packets during this measurement interval 650 * @bytes: the number of bytes during this measurement interval 651 * 652 * Stores a new ITR value based on packets and byte 653 * counts during the last interrupt. The advantage of per interrupt 654 * computation is faster updates and more accurate ITR for the current 655 * traffic pattern. Constants in this function were computed 656 * based on theoretical maximum wire speed and thresholds were set based 657 * on testing data as well as attempting to minimize response time 658 * while increasing bulk throughput. 659 **/ 660 static enum latency_range igbvf_update_itr(struct igbvf_adapter *adapter, 661 enum latency_range itr_setting, 662 int packets, int bytes) 663 { 664 enum latency_range retval = itr_setting; 665 666 if (packets == 0) 667 goto update_itr_done; 668 669 switch (itr_setting) { 670 case lowest_latency: 671 /* handle TSO and jumbo frames */ 672 if (bytes/packets > 8000) 673 retval = bulk_latency; 674 else if ((packets < 5) && (bytes > 512)) 675 retval = low_latency; 676 break; 677 case low_latency: /* 50 usec aka 20000 ints/s */ 678 if (bytes > 10000) { 679 /* this if handles the TSO accounting */ 680 if (bytes/packets > 8000) 681 retval = bulk_latency; 682 else if ((packets < 10) || ((bytes/packets) > 1200)) 683 retval = bulk_latency; 684 else if ((packets > 35)) 685 retval = lowest_latency; 686 } else if (bytes/packets > 2000) { 687 retval = bulk_latency; 688 } else if (packets <= 2 && bytes < 512) { 689 retval = lowest_latency; 690 } 691 break; 692 case bulk_latency: /* 250 usec aka 4000 ints/s */ 693 if (bytes > 25000) { 694 if (packets > 35) 695 retval = low_latency; 696 } else if (bytes < 6000) { 697 retval = low_latency; 698 } 699 break; 700 default: 701 break; 702 } 703 704 update_itr_done: 705 return retval; 706 } 707 708 static int igbvf_range_to_itr(enum latency_range current_range) 709 { 710 int new_itr; 711 712 switch (current_range) { 713 /* counts and packets in update_itr are dependent on these numbers */ 714 case lowest_latency: 715 new_itr = IGBVF_70K_ITR; 716 break; 717 case low_latency: 718 new_itr = IGBVF_20K_ITR; 719 break; 720 case bulk_latency: 721 new_itr = IGBVF_4K_ITR; 722 break; 723 default: 724 new_itr = IGBVF_START_ITR; 725 break; 726 } 727 return new_itr; 728 } 729 730 static void igbvf_set_itr(struct igbvf_adapter *adapter) 731 { 732 u32 new_itr; 733 734 adapter->tx_ring->itr_range = 735 igbvf_update_itr(adapter, 736 adapter->tx_ring->itr_val, 737 adapter->total_tx_packets, 738 adapter->total_tx_bytes); 739 740 /* conservative mode (itr 3) eliminates the lowest_latency setting */ 741 if (adapter->requested_itr == 3 && 742 adapter->tx_ring->itr_range == lowest_latency) 743 adapter->tx_ring->itr_range = low_latency; 744 745 new_itr = igbvf_range_to_itr(adapter->tx_ring->itr_range); 746 747 748 if (new_itr != adapter->tx_ring->itr_val) { 749 u32 current_itr = adapter->tx_ring->itr_val; 750 /* 751 * this attempts to bias the interrupt rate towards Bulk 752 * by adding intermediate steps when interrupt rate is 753 * increasing 754 */ 755 new_itr = new_itr > current_itr ? 756 min(current_itr + (new_itr >> 2), new_itr) : 757 new_itr; 758 adapter->tx_ring->itr_val = new_itr; 759 760 adapter->tx_ring->set_itr = 1; 761 } 762 763 adapter->rx_ring->itr_range = 764 igbvf_update_itr(adapter, adapter->rx_ring->itr_val, 765 adapter->total_rx_packets, 766 adapter->total_rx_bytes); 767 if (adapter->requested_itr == 3 && 768 adapter->rx_ring->itr_range == lowest_latency) 769 adapter->rx_ring->itr_range = low_latency; 770 771 new_itr = igbvf_range_to_itr(adapter->rx_ring->itr_range); 772 773 if (new_itr != adapter->rx_ring->itr_val) { 774 u32 current_itr = adapter->rx_ring->itr_val; 775 new_itr = new_itr > current_itr ? 776 min(current_itr + (new_itr >> 2), new_itr) : 777 new_itr; 778 adapter->rx_ring->itr_val = new_itr; 779 780 adapter->rx_ring->set_itr = 1; 781 } 782 } 783 784 /** 785 * igbvf_clean_tx_irq - Reclaim resources after transmit completes 786 * @adapter: board private structure 787 * 788 * returns true if ring is completely cleaned 789 **/ 790 static bool igbvf_clean_tx_irq(struct igbvf_ring *tx_ring) 791 { 792 struct igbvf_adapter *adapter = tx_ring->adapter; 793 struct net_device *netdev = adapter->netdev; 794 struct igbvf_buffer *buffer_info; 795 struct sk_buff *skb; 796 union e1000_adv_tx_desc *tx_desc, *eop_desc; 797 unsigned int total_bytes = 0, total_packets = 0; 798 unsigned int i, count = 0; 799 bool cleaned = false; 800 801 i = tx_ring->next_to_clean; 802 buffer_info = &tx_ring->buffer_info[i]; 803 eop_desc = buffer_info->next_to_watch; 804 805 do { 806 /* if next_to_watch is not set then there is no work pending */ 807 if (!eop_desc) 808 break; 809 810 /* prevent any other reads prior to eop_desc */ 811 read_barrier_depends(); 812 813 /* if DD is not set pending work has not been completed */ 814 if (!(eop_desc->wb.status & cpu_to_le32(E1000_TXD_STAT_DD))) 815 break; 816 817 /* clear next_to_watch to prevent false hangs */ 818 buffer_info->next_to_watch = NULL; 819 820 for (cleaned = false; !cleaned; count++) { 821 tx_desc = IGBVF_TX_DESC_ADV(*tx_ring, i); 822 cleaned = (tx_desc == eop_desc); 823 skb = buffer_info->skb; 824 825 if (skb) { 826 unsigned int segs, bytecount; 827 828 /* gso_segs is currently only valid for tcp */ 829 segs = skb_shinfo(skb)->gso_segs ?: 1; 830 /* multiply data chunks by size of headers */ 831 bytecount = ((segs - 1) * skb_headlen(skb)) + 832 skb->len; 833 total_packets += segs; 834 total_bytes += bytecount; 835 } 836 837 igbvf_put_txbuf(adapter, buffer_info); 838 tx_desc->wb.status = 0; 839 840 i++; 841 if (i == tx_ring->count) 842 i = 0; 843 844 buffer_info = &tx_ring->buffer_info[i]; 845 } 846 847 eop_desc = buffer_info->next_to_watch; 848 } while (count < tx_ring->count); 849 850 tx_ring->next_to_clean = i; 851 852 if (unlikely(count && 853 netif_carrier_ok(netdev) && 854 igbvf_desc_unused(tx_ring) >= IGBVF_TX_QUEUE_WAKE)) { 855 /* Make sure that anybody stopping the queue after this 856 * sees the new next_to_clean. 857 */ 858 smp_mb(); 859 if (netif_queue_stopped(netdev) && 860 !(test_bit(__IGBVF_DOWN, &adapter->state))) { 861 netif_wake_queue(netdev); 862 ++adapter->restart_queue; 863 } 864 } 865 866 adapter->net_stats.tx_bytes += total_bytes; 867 adapter->net_stats.tx_packets += total_packets; 868 return count < tx_ring->count; 869 } 870 871 static irqreturn_t igbvf_msix_other(int irq, void *data) 872 { 873 struct net_device *netdev = data; 874 struct igbvf_adapter *adapter = netdev_priv(netdev); 875 struct e1000_hw *hw = &adapter->hw; 876 877 adapter->int_counter1++; 878 879 netif_carrier_off(netdev); 880 hw->mac.get_link_status = 1; 881 if (!test_bit(__IGBVF_DOWN, &adapter->state)) 882 mod_timer(&adapter->watchdog_timer, jiffies + 1); 883 884 ew32(EIMS, adapter->eims_other); 885 886 return IRQ_HANDLED; 887 } 888 889 static irqreturn_t igbvf_intr_msix_tx(int irq, void *data) 890 { 891 struct net_device *netdev = data; 892 struct igbvf_adapter *adapter = netdev_priv(netdev); 893 struct e1000_hw *hw = &adapter->hw; 894 struct igbvf_ring *tx_ring = adapter->tx_ring; 895 896 if (tx_ring->set_itr) { 897 writel(tx_ring->itr_val, 898 adapter->hw.hw_addr + tx_ring->itr_register); 899 adapter->tx_ring->set_itr = 0; 900 } 901 902 adapter->total_tx_bytes = 0; 903 adapter->total_tx_packets = 0; 904 905 /* auto mask will automatically reenable the interrupt when we write 906 * EICS */ 907 if (!igbvf_clean_tx_irq(tx_ring)) 908 /* Ring was not completely cleaned, so fire another interrupt */ 909 ew32(EICS, tx_ring->eims_value); 910 else 911 ew32(EIMS, tx_ring->eims_value); 912 913 return IRQ_HANDLED; 914 } 915 916 static irqreturn_t igbvf_intr_msix_rx(int irq, void *data) 917 { 918 struct net_device *netdev = data; 919 struct igbvf_adapter *adapter = netdev_priv(netdev); 920 921 adapter->int_counter0++; 922 923 /* Write the ITR value calculated at the end of the 924 * previous interrupt. 925 */ 926 if (adapter->rx_ring->set_itr) { 927 writel(adapter->rx_ring->itr_val, 928 adapter->hw.hw_addr + adapter->rx_ring->itr_register); 929 adapter->rx_ring->set_itr = 0; 930 } 931 932 if (napi_schedule_prep(&adapter->rx_ring->napi)) { 933 adapter->total_rx_bytes = 0; 934 adapter->total_rx_packets = 0; 935 __napi_schedule(&adapter->rx_ring->napi); 936 } 937 938 return IRQ_HANDLED; 939 } 940 941 #define IGBVF_NO_QUEUE -1 942 943 static void igbvf_assign_vector(struct igbvf_adapter *adapter, int rx_queue, 944 int tx_queue, int msix_vector) 945 { 946 struct e1000_hw *hw = &adapter->hw; 947 u32 ivar, index; 948 949 /* 82576 uses a table-based method for assigning vectors. 950 Each queue has a single entry in the table to which we write 951 a vector number along with a "valid" bit. Sadly, the layout 952 of the table is somewhat counterintuitive. */ 953 if (rx_queue > IGBVF_NO_QUEUE) { 954 index = (rx_queue >> 1); 955 ivar = array_er32(IVAR0, index); 956 if (rx_queue & 0x1) { 957 /* vector goes into third byte of register */ 958 ivar = ivar & 0xFF00FFFF; 959 ivar |= (msix_vector | E1000_IVAR_VALID) << 16; 960 } else { 961 /* vector goes into low byte of register */ 962 ivar = ivar & 0xFFFFFF00; 963 ivar |= msix_vector | E1000_IVAR_VALID; 964 } 965 adapter->rx_ring[rx_queue].eims_value = 1 << msix_vector; 966 array_ew32(IVAR0, index, ivar); 967 } 968 if (tx_queue > IGBVF_NO_QUEUE) { 969 index = (tx_queue >> 1); 970 ivar = array_er32(IVAR0, index); 971 if (tx_queue & 0x1) { 972 /* vector goes into high byte of register */ 973 ivar = ivar & 0x00FFFFFF; 974 ivar |= (msix_vector | E1000_IVAR_VALID) << 24; 975 } else { 976 /* vector goes into second byte of register */ 977 ivar = ivar & 0xFFFF00FF; 978 ivar |= (msix_vector | E1000_IVAR_VALID) << 8; 979 } 980 adapter->tx_ring[tx_queue].eims_value = 1 << msix_vector; 981 array_ew32(IVAR0, index, ivar); 982 } 983 } 984 985 /** 986 * igbvf_configure_msix - Configure MSI-X hardware 987 * 988 * igbvf_configure_msix sets up the hardware to properly 989 * generate MSI-X interrupts. 990 **/ 991 static void igbvf_configure_msix(struct igbvf_adapter *adapter) 992 { 993 u32 tmp; 994 struct e1000_hw *hw = &adapter->hw; 995 struct igbvf_ring *tx_ring = adapter->tx_ring; 996 struct igbvf_ring *rx_ring = adapter->rx_ring; 997 int vector = 0; 998 999 adapter->eims_enable_mask = 0; 1000 1001 igbvf_assign_vector(adapter, IGBVF_NO_QUEUE, 0, vector++); 1002 adapter->eims_enable_mask |= tx_ring->eims_value; 1003 writel(tx_ring->itr_val, hw->hw_addr + tx_ring->itr_register); 1004 igbvf_assign_vector(adapter, 0, IGBVF_NO_QUEUE, vector++); 1005 adapter->eims_enable_mask |= rx_ring->eims_value; 1006 writel(rx_ring->itr_val, hw->hw_addr + rx_ring->itr_register); 1007 1008 /* set vector for other causes, i.e. link changes */ 1009 1010 tmp = (vector++ | E1000_IVAR_VALID); 1011 1012 ew32(IVAR_MISC, tmp); 1013 1014 adapter->eims_enable_mask = (1 << (vector)) - 1; 1015 adapter->eims_other = 1 << (vector - 1); 1016 e1e_flush(); 1017 } 1018 1019 static void igbvf_reset_interrupt_capability(struct igbvf_adapter *adapter) 1020 { 1021 if (adapter->msix_entries) { 1022 pci_disable_msix(adapter->pdev); 1023 kfree(adapter->msix_entries); 1024 adapter->msix_entries = NULL; 1025 } 1026 } 1027 1028 /** 1029 * igbvf_set_interrupt_capability - set MSI or MSI-X if supported 1030 * 1031 * Attempt to configure interrupts using the best available 1032 * capabilities of the hardware and kernel. 1033 **/ 1034 static void igbvf_set_interrupt_capability(struct igbvf_adapter *adapter) 1035 { 1036 int err = -ENOMEM; 1037 int i; 1038 1039 /* we allocate 3 vectors, 1 for tx, 1 for rx, one for pf messages */ 1040 adapter->msix_entries = kcalloc(3, sizeof(struct msix_entry), 1041 GFP_KERNEL); 1042 if (adapter->msix_entries) { 1043 for (i = 0; i < 3; i++) 1044 adapter->msix_entries[i].entry = i; 1045 1046 err = pci_enable_msix(adapter->pdev, 1047 adapter->msix_entries, 3); 1048 } 1049 1050 if (err) { 1051 /* MSI-X failed */ 1052 dev_err(&adapter->pdev->dev, 1053 "Failed to initialize MSI-X interrupts.\n"); 1054 igbvf_reset_interrupt_capability(adapter); 1055 } 1056 } 1057 1058 /** 1059 * igbvf_request_msix - Initialize MSI-X interrupts 1060 * 1061 * igbvf_request_msix allocates MSI-X vectors and requests interrupts from the 1062 * kernel. 1063 **/ 1064 static int igbvf_request_msix(struct igbvf_adapter *adapter) 1065 { 1066 struct net_device *netdev = adapter->netdev; 1067 int err = 0, vector = 0; 1068 1069 if (strlen(netdev->name) < (IFNAMSIZ - 5)) { 1070 sprintf(adapter->tx_ring->name, "%s-tx-0", netdev->name); 1071 sprintf(adapter->rx_ring->name, "%s-rx-0", netdev->name); 1072 } else { 1073 memcpy(adapter->tx_ring->name, netdev->name, IFNAMSIZ); 1074 memcpy(adapter->rx_ring->name, netdev->name, IFNAMSIZ); 1075 } 1076 1077 err = request_irq(adapter->msix_entries[vector].vector, 1078 igbvf_intr_msix_tx, 0, adapter->tx_ring->name, 1079 netdev); 1080 if (err) 1081 goto out; 1082 1083 adapter->tx_ring->itr_register = E1000_EITR(vector); 1084 adapter->tx_ring->itr_val = adapter->current_itr; 1085 vector++; 1086 1087 err = request_irq(adapter->msix_entries[vector].vector, 1088 igbvf_intr_msix_rx, 0, adapter->rx_ring->name, 1089 netdev); 1090 if (err) 1091 goto out; 1092 1093 adapter->rx_ring->itr_register = E1000_EITR(vector); 1094 adapter->rx_ring->itr_val = adapter->current_itr; 1095 vector++; 1096 1097 err = request_irq(adapter->msix_entries[vector].vector, 1098 igbvf_msix_other, 0, netdev->name, netdev); 1099 if (err) 1100 goto out; 1101 1102 igbvf_configure_msix(adapter); 1103 return 0; 1104 out: 1105 return err; 1106 } 1107 1108 /** 1109 * igbvf_alloc_queues - Allocate memory for all rings 1110 * @adapter: board private structure to initialize 1111 **/ 1112 static int igbvf_alloc_queues(struct igbvf_adapter *adapter) 1113 { 1114 struct net_device *netdev = adapter->netdev; 1115 1116 adapter->tx_ring = kzalloc(sizeof(struct igbvf_ring), GFP_KERNEL); 1117 if (!adapter->tx_ring) 1118 return -ENOMEM; 1119 1120 adapter->rx_ring = kzalloc(sizeof(struct igbvf_ring), GFP_KERNEL); 1121 if (!adapter->rx_ring) { 1122 kfree(adapter->tx_ring); 1123 return -ENOMEM; 1124 } 1125 1126 netif_napi_add(netdev, &adapter->rx_ring->napi, igbvf_poll, 64); 1127 1128 return 0; 1129 } 1130 1131 /** 1132 * igbvf_request_irq - initialize interrupts 1133 * 1134 * Attempts to configure interrupts using the best available 1135 * capabilities of the hardware and kernel. 1136 **/ 1137 static int igbvf_request_irq(struct igbvf_adapter *adapter) 1138 { 1139 int err = -1; 1140 1141 /* igbvf supports msi-x only */ 1142 if (adapter->msix_entries) 1143 err = igbvf_request_msix(adapter); 1144 1145 if (!err) 1146 return err; 1147 1148 dev_err(&adapter->pdev->dev, 1149 "Unable to allocate interrupt, Error: %d\n", err); 1150 1151 return err; 1152 } 1153 1154 static void igbvf_free_irq(struct igbvf_adapter *adapter) 1155 { 1156 struct net_device *netdev = adapter->netdev; 1157 int vector; 1158 1159 if (adapter->msix_entries) { 1160 for (vector = 0; vector < 3; vector++) 1161 free_irq(adapter->msix_entries[vector].vector, netdev); 1162 } 1163 } 1164 1165 /** 1166 * igbvf_irq_disable - Mask off interrupt generation on the NIC 1167 **/ 1168 static void igbvf_irq_disable(struct igbvf_adapter *adapter) 1169 { 1170 struct e1000_hw *hw = &adapter->hw; 1171 1172 ew32(EIMC, ~0); 1173 1174 if (adapter->msix_entries) 1175 ew32(EIAC, 0); 1176 } 1177 1178 /** 1179 * igbvf_irq_enable - Enable default interrupt generation settings 1180 **/ 1181 static void igbvf_irq_enable(struct igbvf_adapter *adapter) 1182 { 1183 struct e1000_hw *hw = &adapter->hw; 1184 1185 ew32(EIAC, adapter->eims_enable_mask); 1186 ew32(EIAM, adapter->eims_enable_mask); 1187 ew32(EIMS, adapter->eims_enable_mask); 1188 } 1189 1190 /** 1191 * igbvf_poll - NAPI Rx polling callback 1192 * @napi: struct associated with this polling callback 1193 * @budget: amount of packets driver is allowed to process this poll 1194 **/ 1195 static int igbvf_poll(struct napi_struct *napi, int budget) 1196 { 1197 struct igbvf_ring *rx_ring = container_of(napi, struct igbvf_ring, napi); 1198 struct igbvf_adapter *adapter = rx_ring->adapter; 1199 struct e1000_hw *hw = &adapter->hw; 1200 int work_done = 0; 1201 1202 igbvf_clean_rx_irq(adapter, &work_done, budget); 1203 1204 /* If not enough Rx work done, exit the polling mode */ 1205 if (work_done < budget) { 1206 napi_complete(napi); 1207 1208 if (adapter->requested_itr & 3) 1209 igbvf_set_itr(adapter); 1210 1211 if (!test_bit(__IGBVF_DOWN, &adapter->state)) 1212 ew32(EIMS, adapter->rx_ring->eims_value); 1213 } 1214 1215 return work_done; 1216 } 1217 1218 /** 1219 * igbvf_set_rlpml - set receive large packet maximum length 1220 * @adapter: board private structure 1221 * 1222 * Configure the maximum size of packets that will be received 1223 */ 1224 static void igbvf_set_rlpml(struct igbvf_adapter *adapter) 1225 { 1226 int max_frame_size; 1227 struct e1000_hw *hw = &adapter->hw; 1228 1229 max_frame_size = adapter->max_frame_size + VLAN_TAG_SIZE; 1230 e1000_rlpml_set_vf(hw, max_frame_size); 1231 } 1232 1233 static int igbvf_vlan_rx_add_vid(struct net_device *netdev, u16 vid) 1234 { 1235 struct igbvf_adapter *adapter = netdev_priv(netdev); 1236 struct e1000_hw *hw = &adapter->hw; 1237 1238 if (hw->mac.ops.set_vfta(hw, vid, true)) { 1239 dev_err(&adapter->pdev->dev, "Failed to add vlan id %d\n", vid); 1240 return -EINVAL; 1241 } 1242 set_bit(vid, adapter->active_vlans); 1243 return 0; 1244 } 1245 1246 static int igbvf_vlan_rx_kill_vid(struct net_device *netdev, u16 vid) 1247 { 1248 struct igbvf_adapter *adapter = netdev_priv(netdev); 1249 struct e1000_hw *hw = &adapter->hw; 1250 1251 if (hw->mac.ops.set_vfta(hw, vid, false)) { 1252 dev_err(&adapter->pdev->dev, 1253 "Failed to remove vlan id %d\n", vid); 1254 return -EINVAL; 1255 } 1256 clear_bit(vid, adapter->active_vlans); 1257 return 0; 1258 } 1259 1260 static void igbvf_restore_vlan(struct igbvf_adapter *adapter) 1261 { 1262 u16 vid; 1263 1264 for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID) 1265 igbvf_vlan_rx_add_vid(adapter->netdev, vid); 1266 } 1267 1268 /** 1269 * igbvf_configure_tx - Configure Transmit Unit after Reset 1270 * @adapter: board private structure 1271 * 1272 * Configure the Tx unit of the MAC after a reset. 1273 **/ 1274 static void igbvf_configure_tx(struct igbvf_adapter *adapter) 1275 { 1276 struct e1000_hw *hw = &adapter->hw; 1277 struct igbvf_ring *tx_ring = adapter->tx_ring; 1278 u64 tdba; 1279 u32 txdctl, dca_txctrl; 1280 1281 /* disable transmits */ 1282 txdctl = er32(TXDCTL(0)); 1283 ew32(TXDCTL(0), txdctl & ~E1000_TXDCTL_QUEUE_ENABLE); 1284 e1e_flush(); 1285 msleep(10); 1286 1287 /* Setup the HW Tx Head and Tail descriptor pointers */ 1288 ew32(TDLEN(0), tx_ring->count * sizeof(union e1000_adv_tx_desc)); 1289 tdba = tx_ring->dma; 1290 ew32(TDBAL(0), (tdba & DMA_BIT_MASK(32))); 1291 ew32(TDBAH(0), (tdba >> 32)); 1292 ew32(TDH(0), 0); 1293 ew32(TDT(0), 0); 1294 tx_ring->head = E1000_TDH(0); 1295 tx_ring->tail = E1000_TDT(0); 1296 1297 /* Turn off Relaxed Ordering on head write-backs. The writebacks 1298 * MUST be delivered in order or it will completely screw up 1299 * our bookeeping. 1300 */ 1301 dca_txctrl = er32(DCA_TXCTRL(0)); 1302 dca_txctrl &= ~E1000_DCA_TXCTRL_TX_WB_RO_EN; 1303 ew32(DCA_TXCTRL(0), dca_txctrl); 1304 1305 /* enable transmits */ 1306 txdctl |= E1000_TXDCTL_QUEUE_ENABLE; 1307 ew32(TXDCTL(0), txdctl); 1308 1309 /* Setup Transmit Descriptor Settings for eop descriptor */ 1310 adapter->txd_cmd = E1000_ADVTXD_DCMD_EOP | E1000_ADVTXD_DCMD_IFCS; 1311 1312 /* enable Report Status bit */ 1313 adapter->txd_cmd |= E1000_ADVTXD_DCMD_RS; 1314 } 1315 1316 /** 1317 * igbvf_setup_srrctl - configure the receive control registers 1318 * @adapter: Board private structure 1319 **/ 1320 static void igbvf_setup_srrctl(struct igbvf_adapter *adapter) 1321 { 1322 struct e1000_hw *hw = &adapter->hw; 1323 u32 srrctl = 0; 1324 1325 srrctl &= ~(E1000_SRRCTL_DESCTYPE_MASK | 1326 E1000_SRRCTL_BSIZEHDR_MASK | 1327 E1000_SRRCTL_BSIZEPKT_MASK); 1328 1329 /* Enable queue drop to avoid head of line blocking */ 1330 srrctl |= E1000_SRRCTL_DROP_EN; 1331 1332 /* Setup buffer sizes */ 1333 srrctl |= ALIGN(adapter->rx_buffer_len, 1024) >> 1334 E1000_SRRCTL_BSIZEPKT_SHIFT; 1335 1336 if (adapter->rx_buffer_len < 2048) { 1337 adapter->rx_ps_hdr_size = 0; 1338 srrctl |= E1000_SRRCTL_DESCTYPE_ADV_ONEBUF; 1339 } else { 1340 adapter->rx_ps_hdr_size = 128; 1341 srrctl |= adapter->rx_ps_hdr_size << 1342 E1000_SRRCTL_BSIZEHDRSIZE_SHIFT; 1343 srrctl |= E1000_SRRCTL_DESCTYPE_HDR_SPLIT_ALWAYS; 1344 } 1345 1346 ew32(SRRCTL(0), srrctl); 1347 } 1348 1349 /** 1350 * igbvf_configure_rx - Configure Receive Unit after Reset 1351 * @adapter: board private structure 1352 * 1353 * Configure the Rx unit of the MAC after a reset. 1354 **/ 1355 static void igbvf_configure_rx(struct igbvf_adapter *adapter) 1356 { 1357 struct e1000_hw *hw = &adapter->hw; 1358 struct igbvf_ring *rx_ring = adapter->rx_ring; 1359 u64 rdba; 1360 u32 rdlen, rxdctl; 1361 1362 /* disable receives */ 1363 rxdctl = er32(RXDCTL(0)); 1364 ew32(RXDCTL(0), rxdctl & ~E1000_RXDCTL_QUEUE_ENABLE); 1365 e1e_flush(); 1366 msleep(10); 1367 1368 rdlen = rx_ring->count * sizeof(union e1000_adv_rx_desc); 1369 1370 /* 1371 * Setup the HW Rx Head and Tail Descriptor Pointers and 1372 * the Base and Length of the Rx Descriptor Ring 1373 */ 1374 rdba = rx_ring->dma; 1375 ew32(RDBAL(0), (rdba & DMA_BIT_MASK(32))); 1376 ew32(RDBAH(0), (rdba >> 32)); 1377 ew32(RDLEN(0), rx_ring->count * sizeof(union e1000_adv_rx_desc)); 1378 rx_ring->head = E1000_RDH(0); 1379 rx_ring->tail = E1000_RDT(0); 1380 ew32(RDH(0), 0); 1381 ew32(RDT(0), 0); 1382 1383 rxdctl |= E1000_RXDCTL_QUEUE_ENABLE; 1384 rxdctl &= 0xFFF00000; 1385 rxdctl |= IGBVF_RX_PTHRESH; 1386 rxdctl |= IGBVF_RX_HTHRESH << 8; 1387 rxdctl |= IGBVF_RX_WTHRESH << 16; 1388 1389 igbvf_set_rlpml(adapter); 1390 1391 /* enable receives */ 1392 ew32(RXDCTL(0), rxdctl); 1393 } 1394 1395 /** 1396 * igbvf_set_multi - Multicast and Promiscuous mode set 1397 * @netdev: network interface device structure 1398 * 1399 * The set_multi entry point is called whenever the multicast address 1400 * list or the network interface flags are updated. This routine is 1401 * responsible for configuring the hardware for proper multicast, 1402 * promiscuous mode, and all-multi behavior. 1403 **/ 1404 static void igbvf_set_multi(struct net_device *netdev) 1405 { 1406 struct igbvf_adapter *adapter = netdev_priv(netdev); 1407 struct e1000_hw *hw = &adapter->hw; 1408 struct netdev_hw_addr *ha; 1409 u8 *mta_list = NULL; 1410 int i; 1411 1412 if (!netdev_mc_empty(netdev)) { 1413 mta_list = kmalloc_array(netdev_mc_count(netdev), ETH_ALEN, 1414 GFP_ATOMIC); 1415 if (!mta_list) 1416 return; 1417 } 1418 1419 /* prepare a packed array of only addresses. */ 1420 i = 0; 1421 netdev_for_each_mc_addr(ha, netdev) 1422 memcpy(mta_list + (i++ * ETH_ALEN), ha->addr, ETH_ALEN); 1423 1424 hw->mac.ops.update_mc_addr_list(hw, mta_list, i, 0, 0); 1425 kfree(mta_list); 1426 } 1427 1428 /** 1429 * igbvf_configure - configure the hardware for Rx and Tx 1430 * @adapter: private board structure 1431 **/ 1432 static void igbvf_configure(struct igbvf_adapter *adapter) 1433 { 1434 igbvf_set_multi(adapter->netdev); 1435 1436 igbvf_restore_vlan(adapter); 1437 1438 igbvf_configure_tx(adapter); 1439 igbvf_setup_srrctl(adapter); 1440 igbvf_configure_rx(adapter); 1441 igbvf_alloc_rx_buffers(adapter->rx_ring, 1442 igbvf_desc_unused(adapter->rx_ring)); 1443 } 1444 1445 /* igbvf_reset - bring the hardware into a known good state 1446 * 1447 * This function boots the hardware and enables some settings that 1448 * require a configuration cycle of the hardware - those cannot be 1449 * set/changed during runtime. After reset the device needs to be 1450 * properly configured for Rx, Tx etc. 1451 */ 1452 static void igbvf_reset(struct igbvf_adapter *adapter) 1453 { 1454 struct e1000_mac_info *mac = &adapter->hw.mac; 1455 struct net_device *netdev = adapter->netdev; 1456 struct e1000_hw *hw = &adapter->hw; 1457 1458 /* Allow time for pending master requests to run */ 1459 if (mac->ops.reset_hw(hw)) 1460 dev_err(&adapter->pdev->dev, "PF still resetting\n"); 1461 1462 mac->ops.init_hw(hw); 1463 1464 if (is_valid_ether_addr(adapter->hw.mac.addr)) { 1465 memcpy(netdev->dev_addr, adapter->hw.mac.addr, 1466 netdev->addr_len); 1467 memcpy(netdev->perm_addr, adapter->hw.mac.addr, 1468 netdev->addr_len); 1469 } 1470 1471 adapter->last_reset = jiffies; 1472 } 1473 1474 int igbvf_up(struct igbvf_adapter *adapter) 1475 { 1476 struct e1000_hw *hw = &adapter->hw; 1477 1478 /* hardware has been reset, we need to reload some things */ 1479 igbvf_configure(adapter); 1480 1481 clear_bit(__IGBVF_DOWN, &adapter->state); 1482 1483 napi_enable(&adapter->rx_ring->napi); 1484 if (adapter->msix_entries) 1485 igbvf_configure_msix(adapter); 1486 1487 /* Clear any pending interrupts. */ 1488 er32(EICR); 1489 igbvf_irq_enable(adapter); 1490 1491 /* start the watchdog */ 1492 hw->mac.get_link_status = 1; 1493 mod_timer(&adapter->watchdog_timer, jiffies + 1); 1494 1495 1496 return 0; 1497 } 1498 1499 void igbvf_down(struct igbvf_adapter *adapter) 1500 { 1501 struct net_device *netdev = adapter->netdev; 1502 struct e1000_hw *hw = &adapter->hw; 1503 u32 rxdctl, txdctl; 1504 1505 /* 1506 * signal that we're down so the interrupt handler does not 1507 * reschedule our watchdog timer 1508 */ 1509 set_bit(__IGBVF_DOWN, &adapter->state); 1510 1511 /* disable receives in the hardware */ 1512 rxdctl = er32(RXDCTL(0)); 1513 ew32(RXDCTL(0), rxdctl & ~E1000_RXDCTL_QUEUE_ENABLE); 1514 1515 netif_stop_queue(netdev); 1516 1517 /* disable transmits in the hardware */ 1518 txdctl = er32(TXDCTL(0)); 1519 ew32(TXDCTL(0), txdctl & ~E1000_TXDCTL_QUEUE_ENABLE); 1520 1521 /* flush both disables and wait for them to finish */ 1522 e1e_flush(); 1523 msleep(10); 1524 1525 napi_disable(&adapter->rx_ring->napi); 1526 1527 igbvf_irq_disable(adapter); 1528 1529 del_timer_sync(&adapter->watchdog_timer); 1530 1531 netif_carrier_off(netdev); 1532 1533 /* record the stats before reset*/ 1534 igbvf_update_stats(adapter); 1535 1536 adapter->link_speed = 0; 1537 adapter->link_duplex = 0; 1538 1539 igbvf_reset(adapter); 1540 igbvf_clean_tx_ring(adapter->tx_ring); 1541 igbvf_clean_rx_ring(adapter->rx_ring); 1542 } 1543 1544 void igbvf_reinit_locked(struct igbvf_adapter *adapter) 1545 { 1546 might_sleep(); 1547 while (test_and_set_bit(__IGBVF_RESETTING, &adapter->state)) 1548 msleep(1); 1549 igbvf_down(adapter); 1550 igbvf_up(adapter); 1551 clear_bit(__IGBVF_RESETTING, &adapter->state); 1552 } 1553 1554 /** 1555 * igbvf_sw_init - Initialize general software structures (struct igbvf_adapter) 1556 * @adapter: board private structure to initialize 1557 * 1558 * igbvf_sw_init initializes the Adapter private data structure. 1559 * Fields are initialized based on PCI device information and 1560 * OS network device settings (MTU size). 1561 **/ 1562 static int igbvf_sw_init(struct igbvf_adapter *adapter) 1563 { 1564 struct net_device *netdev = adapter->netdev; 1565 s32 rc; 1566 1567 adapter->rx_buffer_len = ETH_FRAME_LEN + VLAN_HLEN + ETH_FCS_LEN; 1568 adapter->rx_ps_hdr_size = 0; 1569 adapter->max_frame_size = netdev->mtu + ETH_HLEN + ETH_FCS_LEN; 1570 adapter->min_frame_size = ETH_ZLEN + ETH_FCS_LEN; 1571 1572 adapter->tx_int_delay = 8; 1573 adapter->tx_abs_int_delay = 32; 1574 adapter->rx_int_delay = 0; 1575 adapter->rx_abs_int_delay = 8; 1576 adapter->requested_itr = 3; 1577 adapter->current_itr = IGBVF_START_ITR; 1578 1579 /* Set various function pointers */ 1580 adapter->ei->init_ops(&adapter->hw); 1581 1582 rc = adapter->hw.mac.ops.init_params(&adapter->hw); 1583 if (rc) 1584 return rc; 1585 1586 rc = adapter->hw.mbx.ops.init_params(&adapter->hw); 1587 if (rc) 1588 return rc; 1589 1590 igbvf_set_interrupt_capability(adapter); 1591 1592 if (igbvf_alloc_queues(adapter)) 1593 return -ENOMEM; 1594 1595 spin_lock_init(&adapter->tx_queue_lock); 1596 1597 /* Explicitly disable IRQ since the NIC can be in any state. */ 1598 igbvf_irq_disable(adapter); 1599 1600 spin_lock_init(&adapter->stats_lock); 1601 1602 set_bit(__IGBVF_DOWN, &adapter->state); 1603 return 0; 1604 } 1605 1606 static void igbvf_initialize_last_counter_stats(struct igbvf_adapter *adapter) 1607 { 1608 struct e1000_hw *hw = &adapter->hw; 1609 1610 adapter->stats.last_gprc = er32(VFGPRC); 1611 adapter->stats.last_gorc = er32(VFGORC); 1612 adapter->stats.last_gptc = er32(VFGPTC); 1613 adapter->stats.last_gotc = er32(VFGOTC); 1614 adapter->stats.last_mprc = er32(VFMPRC); 1615 adapter->stats.last_gotlbc = er32(VFGOTLBC); 1616 adapter->stats.last_gptlbc = er32(VFGPTLBC); 1617 adapter->stats.last_gorlbc = er32(VFGORLBC); 1618 adapter->stats.last_gprlbc = er32(VFGPRLBC); 1619 1620 adapter->stats.base_gprc = er32(VFGPRC); 1621 adapter->stats.base_gorc = er32(VFGORC); 1622 adapter->stats.base_gptc = er32(VFGPTC); 1623 adapter->stats.base_gotc = er32(VFGOTC); 1624 adapter->stats.base_mprc = er32(VFMPRC); 1625 adapter->stats.base_gotlbc = er32(VFGOTLBC); 1626 adapter->stats.base_gptlbc = er32(VFGPTLBC); 1627 adapter->stats.base_gorlbc = er32(VFGORLBC); 1628 adapter->stats.base_gprlbc = er32(VFGPRLBC); 1629 } 1630 1631 /** 1632 * igbvf_open - Called when a network interface is made active 1633 * @netdev: network interface device structure 1634 * 1635 * Returns 0 on success, negative value on failure 1636 * 1637 * The open entry point is called when a network interface is made 1638 * active by the system (IFF_UP). At this point all resources needed 1639 * for transmit and receive operations are allocated, the interrupt 1640 * handler is registered with the OS, the watchdog timer is started, 1641 * and the stack is notified that the interface is ready. 1642 **/ 1643 static int igbvf_open(struct net_device *netdev) 1644 { 1645 struct igbvf_adapter *adapter = netdev_priv(netdev); 1646 struct e1000_hw *hw = &adapter->hw; 1647 int err; 1648 1649 /* disallow open during test */ 1650 if (test_bit(__IGBVF_TESTING, &adapter->state)) 1651 return -EBUSY; 1652 1653 /* allocate transmit descriptors */ 1654 err = igbvf_setup_tx_resources(adapter, adapter->tx_ring); 1655 if (err) 1656 goto err_setup_tx; 1657 1658 /* allocate receive descriptors */ 1659 err = igbvf_setup_rx_resources(adapter, adapter->rx_ring); 1660 if (err) 1661 goto err_setup_rx; 1662 1663 /* 1664 * before we allocate an interrupt, we must be ready to handle it. 1665 * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt 1666 * as soon as we call pci_request_irq, so we have to setup our 1667 * clean_rx handler before we do so. 1668 */ 1669 igbvf_configure(adapter); 1670 1671 err = igbvf_request_irq(adapter); 1672 if (err) 1673 goto err_req_irq; 1674 1675 /* From here on the code is the same as igbvf_up() */ 1676 clear_bit(__IGBVF_DOWN, &adapter->state); 1677 1678 napi_enable(&adapter->rx_ring->napi); 1679 1680 /* clear any pending interrupts */ 1681 er32(EICR); 1682 1683 igbvf_irq_enable(adapter); 1684 1685 /* start the watchdog */ 1686 hw->mac.get_link_status = 1; 1687 mod_timer(&adapter->watchdog_timer, jiffies + 1); 1688 1689 return 0; 1690 1691 err_req_irq: 1692 igbvf_free_rx_resources(adapter->rx_ring); 1693 err_setup_rx: 1694 igbvf_free_tx_resources(adapter->tx_ring); 1695 err_setup_tx: 1696 igbvf_reset(adapter); 1697 1698 return err; 1699 } 1700 1701 /** 1702 * igbvf_close - Disables a network interface 1703 * @netdev: network interface device structure 1704 * 1705 * Returns 0, this is not allowed to fail 1706 * 1707 * The close entry point is called when an interface is de-activated 1708 * by the OS. The hardware is still under the drivers control, but 1709 * needs to be disabled. A global MAC reset is issued to stop the 1710 * hardware, and all transmit and receive resources are freed. 1711 **/ 1712 static int igbvf_close(struct net_device *netdev) 1713 { 1714 struct igbvf_adapter *adapter = netdev_priv(netdev); 1715 1716 WARN_ON(test_bit(__IGBVF_RESETTING, &adapter->state)); 1717 igbvf_down(adapter); 1718 1719 igbvf_free_irq(adapter); 1720 1721 igbvf_free_tx_resources(adapter->tx_ring); 1722 igbvf_free_rx_resources(adapter->rx_ring); 1723 1724 return 0; 1725 } 1726 /** 1727 * igbvf_set_mac - Change the Ethernet Address of the NIC 1728 * @netdev: network interface device structure 1729 * @p: pointer to an address structure 1730 * 1731 * Returns 0 on success, negative on failure 1732 **/ 1733 static int igbvf_set_mac(struct net_device *netdev, void *p) 1734 { 1735 struct igbvf_adapter *adapter = netdev_priv(netdev); 1736 struct e1000_hw *hw = &adapter->hw; 1737 struct sockaddr *addr = p; 1738 1739 if (!is_valid_ether_addr(addr->sa_data)) 1740 return -EADDRNOTAVAIL; 1741 1742 memcpy(hw->mac.addr, addr->sa_data, netdev->addr_len); 1743 1744 hw->mac.ops.rar_set(hw, hw->mac.addr, 0); 1745 1746 if (memcmp(addr->sa_data, hw->mac.addr, 6)) 1747 return -EADDRNOTAVAIL; 1748 1749 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len); 1750 1751 return 0; 1752 } 1753 1754 #define UPDATE_VF_COUNTER(reg, name) \ 1755 { \ 1756 u32 current_counter = er32(reg); \ 1757 if (current_counter < adapter->stats.last_##name) \ 1758 adapter->stats.name += 0x100000000LL; \ 1759 adapter->stats.last_##name = current_counter; \ 1760 adapter->stats.name &= 0xFFFFFFFF00000000LL; \ 1761 adapter->stats.name |= current_counter; \ 1762 } 1763 1764 /** 1765 * igbvf_update_stats - Update the board statistics counters 1766 * @adapter: board private structure 1767 **/ 1768 void igbvf_update_stats(struct igbvf_adapter *adapter) 1769 { 1770 struct e1000_hw *hw = &adapter->hw; 1771 struct pci_dev *pdev = adapter->pdev; 1772 1773 /* 1774 * Prevent stats update while adapter is being reset, link is down 1775 * or if the pci connection is down. 1776 */ 1777 if (adapter->link_speed == 0) 1778 return; 1779 1780 if (test_bit(__IGBVF_RESETTING, &adapter->state)) 1781 return; 1782 1783 if (pci_channel_offline(pdev)) 1784 return; 1785 1786 UPDATE_VF_COUNTER(VFGPRC, gprc); 1787 UPDATE_VF_COUNTER(VFGORC, gorc); 1788 UPDATE_VF_COUNTER(VFGPTC, gptc); 1789 UPDATE_VF_COUNTER(VFGOTC, gotc); 1790 UPDATE_VF_COUNTER(VFMPRC, mprc); 1791 UPDATE_VF_COUNTER(VFGOTLBC, gotlbc); 1792 UPDATE_VF_COUNTER(VFGPTLBC, gptlbc); 1793 UPDATE_VF_COUNTER(VFGORLBC, gorlbc); 1794 UPDATE_VF_COUNTER(VFGPRLBC, gprlbc); 1795 1796 /* Fill out the OS statistics structure */ 1797 adapter->net_stats.multicast = adapter->stats.mprc; 1798 } 1799 1800 static void igbvf_print_link_info(struct igbvf_adapter *adapter) 1801 { 1802 dev_info(&adapter->pdev->dev, "Link is Up %d Mbps %s Duplex\n", 1803 adapter->link_speed, 1804 adapter->link_duplex == FULL_DUPLEX ? "Full" : "Half"); 1805 } 1806 1807 static bool igbvf_has_link(struct igbvf_adapter *adapter) 1808 { 1809 struct e1000_hw *hw = &adapter->hw; 1810 s32 ret_val = E1000_SUCCESS; 1811 bool link_active; 1812 1813 /* If interface is down, stay link down */ 1814 if (test_bit(__IGBVF_DOWN, &adapter->state)) 1815 return false; 1816 1817 ret_val = hw->mac.ops.check_for_link(hw); 1818 link_active = !hw->mac.get_link_status; 1819 1820 /* if check for link returns error we will need to reset */ 1821 if (ret_val && time_after(jiffies, adapter->last_reset + (10 * HZ))) 1822 schedule_work(&adapter->reset_task); 1823 1824 return link_active; 1825 } 1826 1827 /** 1828 * igbvf_watchdog - Timer Call-back 1829 * @data: pointer to adapter cast into an unsigned long 1830 **/ 1831 static void igbvf_watchdog(unsigned long data) 1832 { 1833 struct igbvf_adapter *adapter = (struct igbvf_adapter *) data; 1834 1835 /* Do the rest outside of interrupt context */ 1836 schedule_work(&adapter->watchdog_task); 1837 } 1838 1839 static void igbvf_watchdog_task(struct work_struct *work) 1840 { 1841 struct igbvf_adapter *adapter = container_of(work, 1842 struct igbvf_adapter, 1843 watchdog_task); 1844 struct net_device *netdev = adapter->netdev; 1845 struct e1000_mac_info *mac = &adapter->hw.mac; 1846 struct igbvf_ring *tx_ring = adapter->tx_ring; 1847 struct e1000_hw *hw = &adapter->hw; 1848 u32 link; 1849 int tx_pending = 0; 1850 1851 link = igbvf_has_link(adapter); 1852 1853 if (link) { 1854 if (!netif_carrier_ok(netdev)) { 1855 mac->ops.get_link_up_info(&adapter->hw, 1856 &adapter->link_speed, 1857 &adapter->link_duplex); 1858 igbvf_print_link_info(adapter); 1859 1860 netif_carrier_on(netdev); 1861 netif_wake_queue(netdev); 1862 } 1863 } else { 1864 if (netif_carrier_ok(netdev)) { 1865 adapter->link_speed = 0; 1866 adapter->link_duplex = 0; 1867 dev_info(&adapter->pdev->dev, "Link is Down\n"); 1868 netif_carrier_off(netdev); 1869 netif_stop_queue(netdev); 1870 } 1871 } 1872 1873 if (netif_carrier_ok(netdev)) { 1874 igbvf_update_stats(adapter); 1875 } else { 1876 tx_pending = (igbvf_desc_unused(tx_ring) + 1 < 1877 tx_ring->count); 1878 if (tx_pending) { 1879 /* 1880 * We've lost link, so the controller stops DMA, 1881 * but we've got queued Tx work that's never going 1882 * to get done, so reset controller to flush Tx. 1883 * (Do the reset outside of interrupt context). 1884 */ 1885 adapter->tx_timeout_count++; 1886 schedule_work(&adapter->reset_task); 1887 } 1888 } 1889 1890 /* Cause software interrupt to ensure Rx ring is cleaned */ 1891 ew32(EICS, adapter->rx_ring->eims_value); 1892 1893 /* Reset the timer */ 1894 if (!test_bit(__IGBVF_DOWN, &adapter->state)) 1895 mod_timer(&adapter->watchdog_timer, 1896 round_jiffies(jiffies + (2 * HZ))); 1897 } 1898 1899 #define IGBVF_TX_FLAGS_CSUM 0x00000001 1900 #define IGBVF_TX_FLAGS_VLAN 0x00000002 1901 #define IGBVF_TX_FLAGS_TSO 0x00000004 1902 #define IGBVF_TX_FLAGS_IPV4 0x00000008 1903 #define IGBVF_TX_FLAGS_VLAN_MASK 0xffff0000 1904 #define IGBVF_TX_FLAGS_VLAN_SHIFT 16 1905 1906 static int igbvf_tso(struct igbvf_adapter *adapter, 1907 struct igbvf_ring *tx_ring, 1908 struct sk_buff *skb, u32 tx_flags, u8 *hdr_len) 1909 { 1910 struct e1000_adv_tx_context_desc *context_desc; 1911 unsigned int i; 1912 int err; 1913 struct igbvf_buffer *buffer_info; 1914 u32 info = 0, tu_cmd = 0; 1915 u32 mss_l4len_idx, l4len; 1916 *hdr_len = 0; 1917 1918 if (skb_header_cloned(skb)) { 1919 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC); 1920 if (err) { 1921 dev_err(&adapter->pdev->dev, 1922 "igbvf_tso returning an error\n"); 1923 return err; 1924 } 1925 } 1926 1927 l4len = tcp_hdrlen(skb); 1928 *hdr_len += l4len; 1929 1930 if (skb->protocol == htons(ETH_P_IP)) { 1931 struct iphdr *iph = ip_hdr(skb); 1932 iph->tot_len = 0; 1933 iph->check = 0; 1934 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr, 1935 iph->daddr, 0, 1936 IPPROTO_TCP, 1937 0); 1938 } else if (skb_is_gso_v6(skb)) { 1939 ipv6_hdr(skb)->payload_len = 0; 1940 tcp_hdr(skb)->check = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr, 1941 &ipv6_hdr(skb)->daddr, 1942 0, IPPROTO_TCP, 0); 1943 } 1944 1945 i = tx_ring->next_to_use; 1946 1947 buffer_info = &tx_ring->buffer_info[i]; 1948 context_desc = IGBVF_TX_CTXTDESC_ADV(*tx_ring, i); 1949 /* VLAN MACLEN IPLEN */ 1950 if (tx_flags & IGBVF_TX_FLAGS_VLAN) 1951 info |= (tx_flags & IGBVF_TX_FLAGS_VLAN_MASK); 1952 info |= (skb_network_offset(skb) << E1000_ADVTXD_MACLEN_SHIFT); 1953 *hdr_len += skb_network_offset(skb); 1954 info |= (skb_transport_header(skb) - skb_network_header(skb)); 1955 *hdr_len += (skb_transport_header(skb) - skb_network_header(skb)); 1956 context_desc->vlan_macip_lens = cpu_to_le32(info); 1957 1958 /* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */ 1959 tu_cmd |= (E1000_TXD_CMD_DEXT | E1000_ADVTXD_DTYP_CTXT); 1960 1961 if (skb->protocol == htons(ETH_P_IP)) 1962 tu_cmd |= E1000_ADVTXD_TUCMD_IPV4; 1963 tu_cmd |= E1000_ADVTXD_TUCMD_L4T_TCP; 1964 1965 context_desc->type_tucmd_mlhl = cpu_to_le32(tu_cmd); 1966 1967 /* MSS L4LEN IDX */ 1968 mss_l4len_idx = (skb_shinfo(skb)->gso_size << E1000_ADVTXD_MSS_SHIFT); 1969 mss_l4len_idx |= (l4len << E1000_ADVTXD_L4LEN_SHIFT); 1970 1971 context_desc->mss_l4len_idx = cpu_to_le32(mss_l4len_idx); 1972 context_desc->seqnum_seed = 0; 1973 1974 buffer_info->time_stamp = jiffies; 1975 buffer_info->dma = 0; 1976 i++; 1977 if (i == tx_ring->count) 1978 i = 0; 1979 1980 tx_ring->next_to_use = i; 1981 1982 return true; 1983 } 1984 1985 static inline bool igbvf_tx_csum(struct igbvf_adapter *adapter, 1986 struct igbvf_ring *tx_ring, 1987 struct sk_buff *skb, u32 tx_flags) 1988 { 1989 struct e1000_adv_tx_context_desc *context_desc; 1990 unsigned int i; 1991 struct igbvf_buffer *buffer_info; 1992 u32 info = 0, tu_cmd = 0; 1993 1994 if ((skb->ip_summed == CHECKSUM_PARTIAL) || 1995 (tx_flags & IGBVF_TX_FLAGS_VLAN)) { 1996 i = tx_ring->next_to_use; 1997 buffer_info = &tx_ring->buffer_info[i]; 1998 context_desc = IGBVF_TX_CTXTDESC_ADV(*tx_ring, i); 1999 2000 if (tx_flags & IGBVF_TX_FLAGS_VLAN) 2001 info |= (tx_flags & IGBVF_TX_FLAGS_VLAN_MASK); 2002 2003 info |= (skb_network_offset(skb) << E1000_ADVTXD_MACLEN_SHIFT); 2004 if (skb->ip_summed == CHECKSUM_PARTIAL) 2005 info |= (skb_transport_header(skb) - 2006 skb_network_header(skb)); 2007 2008 2009 context_desc->vlan_macip_lens = cpu_to_le32(info); 2010 2011 tu_cmd |= (E1000_TXD_CMD_DEXT | E1000_ADVTXD_DTYP_CTXT); 2012 2013 if (skb->ip_summed == CHECKSUM_PARTIAL) { 2014 switch (skb->protocol) { 2015 case __constant_htons(ETH_P_IP): 2016 tu_cmd |= E1000_ADVTXD_TUCMD_IPV4; 2017 if (ip_hdr(skb)->protocol == IPPROTO_TCP) 2018 tu_cmd |= E1000_ADVTXD_TUCMD_L4T_TCP; 2019 break; 2020 case __constant_htons(ETH_P_IPV6): 2021 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP) 2022 tu_cmd |= E1000_ADVTXD_TUCMD_L4T_TCP; 2023 break; 2024 default: 2025 break; 2026 } 2027 } 2028 2029 context_desc->type_tucmd_mlhl = cpu_to_le32(tu_cmd); 2030 context_desc->seqnum_seed = 0; 2031 context_desc->mss_l4len_idx = 0; 2032 2033 buffer_info->time_stamp = jiffies; 2034 buffer_info->dma = 0; 2035 i++; 2036 if (i == tx_ring->count) 2037 i = 0; 2038 tx_ring->next_to_use = i; 2039 2040 return true; 2041 } 2042 2043 return false; 2044 } 2045 2046 static int igbvf_maybe_stop_tx(struct net_device *netdev, int size) 2047 { 2048 struct igbvf_adapter *adapter = netdev_priv(netdev); 2049 2050 /* there is enough descriptors then we don't need to worry */ 2051 if (igbvf_desc_unused(adapter->tx_ring) >= size) 2052 return 0; 2053 2054 netif_stop_queue(netdev); 2055 2056 smp_mb(); 2057 2058 /* We need to check again just in case room has been made available */ 2059 if (igbvf_desc_unused(adapter->tx_ring) < size) 2060 return -EBUSY; 2061 2062 netif_wake_queue(netdev); 2063 2064 ++adapter->restart_queue; 2065 return 0; 2066 } 2067 2068 #define IGBVF_MAX_TXD_PWR 16 2069 #define IGBVF_MAX_DATA_PER_TXD (1 << IGBVF_MAX_TXD_PWR) 2070 2071 static inline int igbvf_tx_map_adv(struct igbvf_adapter *adapter, 2072 struct igbvf_ring *tx_ring, 2073 struct sk_buff *skb) 2074 { 2075 struct igbvf_buffer *buffer_info; 2076 struct pci_dev *pdev = adapter->pdev; 2077 unsigned int len = skb_headlen(skb); 2078 unsigned int count = 0, i; 2079 unsigned int f; 2080 2081 i = tx_ring->next_to_use; 2082 2083 buffer_info = &tx_ring->buffer_info[i]; 2084 BUG_ON(len >= IGBVF_MAX_DATA_PER_TXD); 2085 buffer_info->length = len; 2086 /* set time_stamp *before* dma to help avoid a possible race */ 2087 buffer_info->time_stamp = jiffies; 2088 buffer_info->mapped_as_page = false; 2089 buffer_info->dma = dma_map_single(&pdev->dev, skb->data, len, 2090 DMA_TO_DEVICE); 2091 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) 2092 goto dma_error; 2093 2094 2095 for (f = 0; f < skb_shinfo(skb)->nr_frags; f++) { 2096 const struct skb_frag_struct *frag; 2097 2098 count++; 2099 i++; 2100 if (i == tx_ring->count) 2101 i = 0; 2102 2103 frag = &skb_shinfo(skb)->frags[f]; 2104 len = skb_frag_size(frag); 2105 2106 buffer_info = &tx_ring->buffer_info[i]; 2107 BUG_ON(len >= IGBVF_MAX_DATA_PER_TXD); 2108 buffer_info->length = len; 2109 buffer_info->time_stamp = jiffies; 2110 buffer_info->mapped_as_page = true; 2111 buffer_info->dma = skb_frag_dma_map(&pdev->dev, frag, 0, len, 2112 DMA_TO_DEVICE); 2113 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) 2114 goto dma_error; 2115 } 2116 2117 tx_ring->buffer_info[i].skb = skb; 2118 2119 return ++count; 2120 2121 dma_error: 2122 dev_err(&pdev->dev, "TX DMA map failed\n"); 2123 2124 /* clear timestamp and dma mappings for failed buffer_info mapping */ 2125 buffer_info->dma = 0; 2126 buffer_info->time_stamp = 0; 2127 buffer_info->length = 0; 2128 buffer_info->mapped_as_page = false; 2129 if (count) 2130 count--; 2131 2132 /* clear timestamp and dma mappings for remaining portion of packet */ 2133 while (count--) { 2134 if (i==0) 2135 i += tx_ring->count; 2136 i--; 2137 buffer_info = &tx_ring->buffer_info[i]; 2138 igbvf_put_txbuf(adapter, buffer_info); 2139 } 2140 2141 return 0; 2142 } 2143 2144 static inline void igbvf_tx_queue_adv(struct igbvf_adapter *adapter, 2145 struct igbvf_ring *tx_ring, 2146 int tx_flags, int count, 2147 unsigned int first, u32 paylen, 2148 u8 hdr_len) 2149 { 2150 union e1000_adv_tx_desc *tx_desc = NULL; 2151 struct igbvf_buffer *buffer_info; 2152 u32 olinfo_status = 0, cmd_type_len; 2153 unsigned int i; 2154 2155 cmd_type_len = (E1000_ADVTXD_DTYP_DATA | E1000_ADVTXD_DCMD_IFCS | 2156 E1000_ADVTXD_DCMD_DEXT); 2157 2158 if (tx_flags & IGBVF_TX_FLAGS_VLAN) 2159 cmd_type_len |= E1000_ADVTXD_DCMD_VLE; 2160 2161 if (tx_flags & IGBVF_TX_FLAGS_TSO) { 2162 cmd_type_len |= E1000_ADVTXD_DCMD_TSE; 2163 2164 /* insert tcp checksum */ 2165 olinfo_status |= E1000_TXD_POPTS_TXSM << 8; 2166 2167 /* insert ip checksum */ 2168 if (tx_flags & IGBVF_TX_FLAGS_IPV4) 2169 olinfo_status |= E1000_TXD_POPTS_IXSM << 8; 2170 2171 } else if (tx_flags & IGBVF_TX_FLAGS_CSUM) { 2172 olinfo_status |= E1000_TXD_POPTS_TXSM << 8; 2173 } 2174 2175 olinfo_status |= ((paylen - hdr_len) << E1000_ADVTXD_PAYLEN_SHIFT); 2176 2177 i = tx_ring->next_to_use; 2178 while (count--) { 2179 buffer_info = &tx_ring->buffer_info[i]; 2180 tx_desc = IGBVF_TX_DESC_ADV(*tx_ring, i); 2181 tx_desc->read.buffer_addr = cpu_to_le64(buffer_info->dma); 2182 tx_desc->read.cmd_type_len = 2183 cpu_to_le32(cmd_type_len | buffer_info->length); 2184 tx_desc->read.olinfo_status = cpu_to_le32(olinfo_status); 2185 i++; 2186 if (i == tx_ring->count) 2187 i = 0; 2188 } 2189 2190 tx_desc->read.cmd_type_len |= cpu_to_le32(adapter->txd_cmd); 2191 /* Force memory writes to complete before letting h/w 2192 * know there are new descriptors to fetch. (Only 2193 * applicable for weak-ordered memory model archs, 2194 * such as IA-64). */ 2195 wmb(); 2196 2197 tx_ring->buffer_info[first].next_to_watch = tx_desc; 2198 tx_ring->next_to_use = i; 2199 writel(i, adapter->hw.hw_addr + tx_ring->tail); 2200 /* we need this if more than one processor can write to our tail 2201 * at a time, it syncronizes IO on IA64/Altix systems */ 2202 mmiowb(); 2203 } 2204 2205 static netdev_tx_t igbvf_xmit_frame_ring_adv(struct sk_buff *skb, 2206 struct net_device *netdev, 2207 struct igbvf_ring *tx_ring) 2208 { 2209 struct igbvf_adapter *adapter = netdev_priv(netdev); 2210 unsigned int first, tx_flags = 0; 2211 u8 hdr_len = 0; 2212 int count = 0; 2213 int tso = 0; 2214 2215 if (test_bit(__IGBVF_DOWN, &adapter->state)) { 2216 dev_kfree_skb_any(skb); 2217 return NETDEV_TX_OK; 2218 } 2219 2220 if (skb->len <= 0) { 2221 dev_kfree_skb_any(skb); 2222 return NETDEV_TX_OK; 2223 } 2224 2225 /* 2226 * need: count + 4 desc gap to keep tail from touching 2227 * + 2 desc gap to keep tail from touching head, 2228 * + 1 desc for skb->data, 2229 * + 1 desc for context descriptor, 2230 * head, otherwise try next time 2231 */ 2232 if (igbvf_maybe_stop_tx(netdev, skb_shinfo(skb)->nr_frags + 4)) { 2233 /* this is a hard error */ 2234 return NETDEV_TX_BUSY; 2235 } 2236 2237 if (vlan_tx_tag_present(skb)) { 2238 tx_flags |= IGBVF_TX_FLAGS_VLAN; 2239 tx_flags |= (vlan_tx_tag_get(skb) << IGBVF_TX_FLAGS_VLAN_SHIFT); 2240 } 2241 2242 if (skb->protocol == htons(ETH_P_IP)) 2243 tx_flags |= IGBVF_TX_FLAGS_IPV4; 2244 2245 first = tx_ring->next_to_use; 2246 2247 tso = skb_is_gso(skb) ? 2248 igbvf_tso(adapter, tx_ring, skb, tx_flags, &hdr_len) : 0; 2249 if (unlikely(tso < 0)) { 2250 dev_kfree_skb_any(skb); 2251 return NETDEV_TX_OK; 2252 } 2253 2254 if (tso) 2255 tx_flags |= IGBVF_TX_FLAGS_TSO; 2256 else if (igbvf_tx_csum(adapter, tx_ring, skb, tx_flags) && 2257 (skb->ip_summed == CHECKSUM_PARTIAL)) 2258 tx_flags |= IGBVF_TX_FLAGS_CSUM; 2259 2260 /* 2261 * count reflects descriptors mapped, if 0 then mapping error 2262 * has occurred and we need to rewind the descriptor queue 2263 */ 2264 count = igbvf_tx_map_adv(adapter, tx_ring, skb); 2265 2266 if (count) { 2267 igbvf_tx_queue_adv(adapter, tx_ring, tx_flags, count, 2268 first, skb->len, hdr_len); 2269 /* Make sure there is space in the ring for the next send. */ 2270 igbvf_maybe_stop_tx(netdev, MAX_SKB_FRAGS + 4); 2271 } else { 2272 dev_kfree_skb_any(skb); 2273 tx_ring->buffer_info[first].time_stamp = 0; 2274 tx_ring->next_to_use = first; 2275 } 2276 2277 return NETDEV_TX_OK; 2278 } 2279 2280 static netdev_tx_t igbvf_xmit_frame(struct sk_buff *skb, 2281 struct net_device *netdev) 2282 { 2283 struct igbvf_adapter *adapter = netdev_priv(netdev); 2284 struct igbvf_ring *tx_ring; 2285 2286 if (test_bit(__IGBVF_DOWN, &adapter->state)) { 2287 dev_kfree_skb_any(skb); 2288 return NETDEV_TX_OK; 2289 } 2290 2291 tx_ring = &adapter->tx_ring[0]; 2292 2293 return igbvf_xmit_frame_ring_adv(skb, netdev, tx_ring); 2294 } 2295 2296 /** 2297 * igbvf_tx_timeout - Respond to a Tx Hang 2298 * @netdev: network interface device structure 2299 **/ 2300 static void igbvf_tx_timeout(struct net_device *netdev) 2301 { 2302 struct igbvf_adapter *adapter = netdev_priv(netdev); 2303 2304 /* Do the reset outside of interrupt context */ 2305 adapter->tx_timeout_count++; 2306 schedule_work(&adapter->reset_task); 2307 } 2308 2309 static void igbvf_reset_task(struct work_struct *work) 2310 { 2311 struct igbvf_adapter *adapter; 2312 adapter = container_of(work, struct igbvf_adapter, reset_task); 2313 2314 igbvf_reinit_locked(adapter); 2315 } 2316 2317 /** 2318 * igbvf_get_stats - Get System Network Statistics 2319 * @netdev: network interface device structure 2320 * 2321 * Returns the address of the device statistics structure. 2322 * The statistics are actually updated from the timer callback. 2323 **/ 2324 static struct net_device_stats *igbvf_get_stats(struct net_device *netdev) 2325 { 2326 struct igbvf_adapter *adapter = netdev_priv(netdev); 2327 2328 /* only return the current stats */ 2329 return &adapter->net_stats; 2330 } 2331 2332 /** 2333 * igbvf_change_mtu - Change the Maximum Transfer Unit 2334 * @netdev: network interface device structure 2335 * @new_mtu: new value for maximum frame size 2336 * 2337 * Returns 0 on success, negative on failure 2338 **/ 2339 static int igbvf_change_mtu(struct net_device *netdev, int new_mtu) 2340 { 2341 struct igbvf_adapter *adapter = netdev_priv(netdev); 2342 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN; 2343 2344 if ((new_mtu < 68) || (max_frame > MAX_JUMBO_FRAME_SIZE)) { 2345 dev_err(&adapter->pdev->dev, "Invalid MTU setting\n"); 2346 return -EINVAL; 2347 } 2348 2349 #define MAX_STD_JUMBO_FRAME_SIZE 9234 2350 if (max_frame > MAX_STD_JUMBO_FRAME_SIZE) { 2351 dev_err(&adapter->pdev->dev, "MTU > 9216 not supported.\n"); 2352 return -EINVAL; 2353 } 2354 2355 while (test_and_set_bit(__IGBVF_RESETTING, &adapter->state)) 2356 msleep(1); 2357 /* igbvf_down has a dependency on max_frame_size */ 2358 adapter->max_frame_size = max_frame; 2359 if (netif_running(netdev)) 2360 igbvf_down(adapter); 2361 2362 /* 2363 * NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN 2364 * means we reserve 2 more, this pushes us to allocate from the next 2365 * larger slab size. 2366 * i.e. RXBUFFER_2048 --> size-4096 slab 2367 * However with the new *_jumbo_rx* routines, jumbo receives will use 2368 * fragmented skbs 2369 */ 2370 2371 if (max_frame <= 1024) 2372 adapter->rx_buffer_len = 1024; 2373 else if (max_frame <= 2048) 2374 adapter->rx_buffer_len = 2048; 2375 else 2376 #if (PAGE_SIZE / 2) > 16384 2377 adapter->rx_buffer_len = 16384; 2378 #else 2379 adapter->rx_buffer_len = PAGE_SIZE / 2; 2380 #endif 2381 2382 2383 /* adjust allocation if LPE protects us, and we aren't using SBP */ 2384 if ((max_frame == ETH_FRAME_LEN + ETH_FCS_LEN) || 2385 (max_frame == ETH_FRAME_LEN + VLAN_HLEN + ETH_FCS_LEN)) 2386 adapter->rx_buffer_len = ETH_FRAME_LEN + VLAN_HLEN + 2387 ETH_FCS_LEN; 2388 2389 dev_info(&adapter->pdev->dev, "changing MTU from %d to %d\n", 2390 netdev->mtu, new_mtu); 2391 netdev->mtu = new_mtu; 2392 2393 if (netif_running(netdev)) 2394 igbvf_up(adapter); 2395 else 2396 igbvf_reset(adapter); 2397 2398 clear_bit(__IGBVF_RESETTING, &adapter->state); 2399 2400 return 0; 2401 } 2402 2403 static int igbvf_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd) 2404 { 2405 switch (cmd) { 2406 default: 2407 return -EOPNOTSUPP; 2408 } 2409 } 2410 2411 static int igbvf_suspend(struct pci_dev *pdev, pm_message_t state) 2412 { 2413 struct net_device *netdev = pci_get_drvdata(pdev); 2414 struct igbvf_adapter *adapter = netdev_priv(netdev); 2415 #ifdef CONFIG_PM 2416 int retval = 0; 2417 #endif 2418 2419 netif_device_detach(netdev); 2420 2421 if (netif_running(netdev)) { 2422 WARN_ON(test_bit(__IGBVF_RESETTING, &adapter->state)); 2423 igbvf_down(adapter); 2424 igbvf_free_irq(adapter); 2425 } 2426 2427 #ifdef CONFIG_PM 2428 retval = pci_save_state(pdev); 2429 if (retval) 2430 return retval; 2431 #endif 2432 2433 pci_disable_device(pdev); 2434 2435 return 0; 2436 } 2437 2438 #ifdef CONFIG_PM 2439 static int igbvf_resume(struct pci_dev *pdev) 2440 { 2441 struct net_device *netdev = pci_get_drvdata(pdev); 2442 struct igbvf_adapter *adapter = netdev_priv(netdev); 2443 u32 err; 2444 2445 pci_restore_state(pdev); 2446 err = pci_enable_device_mem(pdev); 2447 if (err) { 2448 dev_err(&pdev->dev, "Cannot enable PCI device from suspend\n"); 2449 return err; 2450 } 2451 2452 pci_set_master(pdev); 2453 2454 if (netif_running(netdev)) { 2455 err = igbvf_request_irq(adapter); 2456 if (err) 2457 return err; 2458 } 2459 2460 igbvf_reset(adapter); 2461 2462 if (netif_running(netdev)) 2463 igbvf_up(adapter); 2464 2465 netif_device_attach(netdev); 2466 2467 return 0; 2468 } 2469 #endif 2470 2471 static void igbvf_shutdown(struct pci_dev *pdev) 2472 { 2473 igbvf_suspend(pdev, PMSG_SUSPEND); 2474 } 2475 2476 #ifdef CONFIG_NET_POLL_CONTROLLER 2477 /* 2478 * Polling 'interrupt' - used by things like netconsole to send skbs 2479 * without having to re-enable interrupts. It's not called while 2480 * the interrupt routine is executing. 2481 */ 2482 static void igbvf_netpoll(struct net_device *netdev) 2483 { 2484 struct igbvf_adapter *adapter = netdev_priv(netdev); 2485 2486 disable_irq(adapter->pdev->irq); 2487 2488 igbvf_clean_tx_irq(adapter->tx_ring); 2489 2490 enable_irq(adapter->pdev->irq); 2491 } 2492 #endif 2493 2494 /** 2495 * igbvf_io_error_detected - called when PCI error is detected 2496 * @pdev: Pointer to PCI device 2497 * @state: The current pci connection state 2498 * 2499 * This function is called after a PCI bus error affecting 2500 * this device has been detected. 2501 */ 2502 static pci_ers_result_t igbvf_io_error_detected(struct pci_dev *pdev, 2503 pci_channel_state_t state) 2504 { 2505 struct net_device *netdev = pci_get_drvdata(pdev); 2506 struct igbvf_adapter *adapter = netdev_priv(netdev); 2507 2508 netif_device_detach(netdev); 2509 2510 if (state == pci_channel_io_perm_failure) 2511 return PCI_ERS_RESULT_DISCONNECT; 2512 2513 if (netif_running(netdev)) 2514 igbvf_down(adapter); 2515 pci_disable_device(pdev); 2516 2517 /* Request a slot slot reset. */ 2518 return PCI_ERS_RESULT_NEED_RESET; 2519 } 2520 2521 /** 2522 * igbvf_io_slot_reset - called after the pci bus has been reset. 2523 * @pdev: Pointer to PCI device 2524 * 2525 * Restart the card from scratch, as if from a cold-boot. Implementation 2526 * resembles the first-half of the igbvf_resume routine. 2527 */ 2528 static pci_ers_result_t igbvf_io_slot_reset(struct pci_dev *pdev) 2529 { 2530 struct net_device *netdev = pci_get_drvdata(pdev); 2531 struct igbvf_adapter *adapter = netdev_priv(netdev); 2532 2533 if (pci_enable_device_mem(pdev)) { 2534 dev_err(&pdev->dev, 2535 "Cannot re-enable PCI device after reset.\n"); 2536 return PCI_ERS_RESULT_DISCONNECT; 2537 } 2538 pci_set_master(pdev); 2539 2540 igbvf_reset(adapter); 2541 2542 return PCI_ERS_RESULT_RECOVERED; 2543 } 2544 2545 /** 2546 * igbvf_io_resume - called when traffic can start flowing again. 2547 * @pdev: Pointer to PCI device 2548 * 2549 * This callback is called when the error recovery driver tells us that 2550 * its OK to resume normal operation. Implementation resembles the 2551 * second-half of the igbvf_resume routine. 2552 */ 2553 static void igbvf_io_resume(struct pci_dev *pdev) 2554 { 2555 struct net_device *netdev = pci_get_drvdata(pdev); 2556 struct igbvf_adapter *adapter = netdev_priv(netdev); 2557 2558 if (netif_running(netdev)) { 2559 if (igbvf_up(adapter)) { 2560 dev_err(&pdev->dev, 2561 "can't bring device back up after reset\n"); 2562 return; 2563 } 2564 } 2565 2566 netif_device_attach(netdev); 2567 } 2568 2569 static void igbvf_print_device_info(struct igbvf_adapter *adapter) 2570 { 2571 struct e1000_hw *hw = &adapter->hw; 2572 struct net_device *netdev = adapter->netdev; 2573 struct pci_dev *pdev = adapter->pdev; 2574 2575 if (hw->mac.type == e1000_vfadapt_i350) 2576 dev_info(&pdev->dev, "Intel(R) I350 Virtual Function\n"); 2577 else 2578 dev_info(&pdev->dev, "Intel(R) 82576 Virtual Function\n"); 2579 dev_info(&pdev->dev, "Address: %pM\n", netdev->dev_addr); 2580 } 2581 2582 static int igbvf_set_features(struct net_device *netdev, 2583 netdev_features_t features) 2584 { 2585 struct igbvf_adapter *adapter = netdev_priv(netdev); 2586 2587 if (features & NETIF_F_RXCSUM) 2588 adapter->flags &= ~IGBVF_FLAG_RX_CSUM_DISABLED; 2589 else 2590 adapter->flags |= IGBVF_FLAG_RX_CSUM_DISABLED; 2591 2592 return 0; 2593 } 2594 2595 static const struct net_device_ops igbvf_netdev_ops = { 2596 .ndo_open = igbvf_open, 2597 .ndo_stop = igbvf_close, 2598 .ndo_start_xmit = igbvf_xmit_frame, 2599 .ndo_get_stats = igbvf_get_stats, 2600 .ndo_set_rx_mode = igbvf_set_multi, 2601 .ndo_set_mac_address = igbvf_set_mac, 2602 .ndo_change_mtu = igbvf_change_mtu, 2603 .ndo_do_ioctl = igbvf_ioctl, 2604 .ndo_tx_timeout = igbvf_tx_timeout, 2605 .ndo_vlan_rx_add_vid = igbvf_vlan_rx_add_vid, 2606 .ndo_vlan_rx_kill_vid = igbvf_vlan_rx_kill_vid, 2607 #ifdef CONFIG_NET_POLL_CONTROLLER 2608 .ndo_poll_controller = igbvf_netpoll, 2609 #endif 2610 .ndo_set_features = igbvf_set_features, 2611 }; 2612 2613 /** 2614 * igbvf_probe - Device Initialization Routine 2615 * @pdev: PCI device information struct 2616 * @ent: entry in igbvf_pci_tbl 2617 * 2618 * Returns 0 on success, negative on failure 2619 * 2620 * igbvf_probe initializes an adapter identified by a pci_dev structure. 2621 * The OS initialization, configuring of the adapter private structure, 2622 * and a hardware reset occur. 2623 **/ 2624 static int igbvf_probe(struct pci_dev *pdev, const struct pci_device_id *ent) 2625 { 2626 struct net_device *netdev; 2627 struct igbvf_adapter *adapter; 2628 struct e1000_hw *hw; 2629 const struct igbvf_info *ei = igbvf_info_tbl[ent->driver_data]; 2630 2631 static int cards_found; 2632 int err, pci_using_dac; 2633 2634 err = pci_enable_device_mem(pdev); 2635 if (err) 2636 return err; 2637 2638 pci_using_dac = 0; 2639 err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(64)); 2640 if (!err) { 2641 err = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64)); 2642 if (!err) 2643 pci_using_dac = 1; 2644 } else { 2645 err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32)); 2646 if (err) { 2647 err = dma_set_coherent_mask(&pdev->dev, 2648 DMA_BIT_MASK(32)); 2649 if (err) { 2650 dev_err(&pdev->dev, "No usable DMA " 2651 "configuration, aborting\n"); 2652 goto err_dma; 2653 } 2654 } 2655 } 2656 2657 err = pci_request_regions(pdev, igbvf_driver_name); 2658 if (err) 2659 goto err_pci_reg; 2660 2661 pci_set_master(pdev); 2662 2663 err = -ENOMEM; 2664 netdev = alloc_etherdev(sizeof(struct igbvf_adapter)); 2665 if (!netdev) 2666 goto err_alloc_etherdev; 2667 2668 SET_NETDEV_DEV(netdev, &pdev->dev); 2669 2670 pci_set_drvdata(pdev, netdev); 2671 adapter = netdev_priv(netdev); 2672 hw = &adapter->hw; 2673 adapter->netdev = netdev; 2674 adapter->pdev = pdev; 2675 adapter->ei = ei; 2676 adapter->pba = ei->pba; 2677 adapter->flags = ei->flags; 2678 adapter->hw.back = adapter; 2679 adapter->hw.mac.type = ei->mac; 2680 adapter->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE); 2681 2682 /* PCI config space info */ 2683 2684 hw->vendor_id = pdev->vendor; 2685 hw->device_id = pdev->device; 2686 hw->subsystem_vendor_id = pdev->subsystem_vendor; 2687 hw->subsystem_device_id = pdev->subsystem_device; 2688 hw->revision_id = pdev->revision; 2689 2690 err = -EIO; 2691 adapter->hw.hw_addr = ioremap(pci_resource_start(pdev, 0), 2692 pci_resource_len(pdev, 0)); 2693 2694 if (!adapter->hw.hw_addr) 2695 goto err_ioremap; 2696 2697 if (ei->get_variants) { 2698 err = ei->get_variants(adapter); 2699 if (err) 2700 goto err_ioremap; 2701 } 2702 2703 /* setup adapter struct */ 2704 err = igbvf_sw_init(adapter); 2705 if (err) 2706 goto err_sw_init; 2707 2708 /* construct the net_device struct */ 2709 netdev->netdev_ops = &igbvf_netdev_ops; 2710 2711 igbvf_set_ethtool_ops(netdev); 2712 netdev->watchdog_timeo = 5 * HZ; 2713 strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1); 2714 2715 adapter->bd_number = cards_found++; 2716 2717 netdev->hw_features = NETIF_F_SG | 2718 NETIF_F_IP_CSUM | 2719 NETIF_F_IPV6_CSUM | 2720 NETIF_F_TSO | 2721 NETIF_F_TSO6 | 2722 NETIF_F_RXCSUM; 2723 2724 netdev->features = netdev->hw_features | 2725 NETIF_F_HW_VLAN_TX | 2726 NETIF_F_HW_VLAN_RX | 2727 NETIF_F_HW_VLAN_FILTER; 2728 2729 if (pci_using_dac) 2730 netdev->features |= NETIF_F_HIGHDMA; 2731 2732 netdev->vlan_features |= NETIF_F_TSO; 2733 netdev->vlan_features |= NETIF_F_TSO6; 2734 netdev->vlan_features |= NETIF_F_IP_CSUM; 2735 netdev->vlan_features |= NETIF_F_IPV6_CSUM; 2736 netdev->vlan_features |= NETIF_F_SG; 2737 2738 /*reset the controller to put the device in a known good state */ 2739 err = hw->mac.ops.reset_hw(hw); 2740 if (err) { 2741 dev_info(&pdev->dev, 2742 "PF still in reset state. Is the PF interface up?\n"); 2743 } else { 2744 err = hw->mac.ops.read_mac_addr(hw); 2745 if (err) 2746 dev_info(&pdev->dev, "Error reading MAC address.\n"); 2747 else if (is_zero_ether_addr(adapter->hw.mac.addr)) 2748 dev_info(&pdev->dev, "MAC address not assigned by administrator.\n"); 2749 memcpy(netdev->dev_addr, adapter->hw.mac.addr, 2750 netdev->addr_len); 2751 } 2752 2753 if (!is_valid_ether_addr(netdev->dev_addr)) { 2754 dev_info(&pdev->dev, "Assigning random MAC address.\n"); 2755 eth_hw_addr_random(netdev); 2756 memcpy(adapter->hw.mac.addr, netdev->dev_addr, 2757 netdev->addr_len); 2758 } 2759 2760 setup_timer(&adapter->watchdog_timer, &igbvf_watchdog, 2761 (unsigned long) adapter); 2762 2763 INIT_WORK(&adapter->reset_task, igbvf_reset_task); 2764 INIT_WORK(&adapter->watchdog_task, igbvf_watchdog_task); 2765 2766 /* ring size defaults */ 2767 adapter->rx_ring->count = 1024; 2768 adapter->tx_ring->count = 1024; 2769 2770 /* reset the hardware with the new settings */ 2771 igbvf_reset(adapter); 2772 2773 /* set hardware-specific flags */ 2774 if (adapter->hw.mac.type == e1000_vfadapt_i350) 2775 adapter->flags |= IGBVF_FLAG_RX_LB_VLAN_BSWAP; 2776 2777 strcpy(netdev->name, "eth%d"); 2778 err = register_netdev(netdev); 2779 if (err) 2780 goto err_hw_init; 2781 2782 /* tell the stack to leave us alone until igbvf_open() is called */ 2783 netif_carrier_off(netdev); 2784 netif_stop_queue(netdev); 2785 2786 igbvf_print_device_info(adapter); 2787 2788 igbvf_initialize_last_counter_stats(adapter); 2789 2790 return 0; 2791 2792 err_hw_init: 2793 kfree(adapter->tx_ring); 2794 kfree(adapter->rx_ring); 2795 err_sw_init: 2796 igbvf_reset_interrupt_capability(adapter); 2797 iounmap(adapter->hw.hw_addr); 2798 err_ioremap: 2799 free_netdev(netdev); 2800 err_alloc_etherdev: 2801 pci_release_regions(pdev); 2802 err_pci_reg: 2803 err_dma: 2804 pci_disable_device(pdev); 2805 return err; 2806 } 2807 2808 /** 2809 * igbvf_remove - Device Removal Routine 2810 * @pdev: PCI device information struct 2811 * 2812 * igbvf_remove is called by the PCI subsystem to alert the driver 2813 * that it should release a PCI device. The could be caused by a 2814 * Hot-Plug event, or because the driver is going to be removed from 2815 * memory. 2816 **/ 2817 static void igbvf_remove(struct pci_dev *pdev) 2818 { 2819 struct net_device *netdev = pci_get_drvdata(pdev); 2820 struct igbvf_adapter *adapter = netdev_priv(netdev); 2821 struct e1000_hw *hw = &adapter->hw; 2822 2823 /* 2824 * The watchdog timer may be rescheduled, so explicitly 2825 * disable it from being rescheduled. 2826 */ 2827 set_bit(__IGBVF_DOWN, &adapter->state); 2828 del_timer_sync(&adapter->watchdog_timer); 2829 2830 cancel_work_sync(&adapter->reset_task); 2831 cancel_work_sync(&adapter->watchdog_task); 2832 2833 unregister_netdev(netdev); 2834 2835 igbvf_reset_interrupt_capability(adapter); 2836 2837 /* 2838 * it is important to delete the napi struct prior to freeing the 2839 * rx ring so that you do not end up with null pointer refs 2840 */ 2841 netif_napi_del(&adapter->rx_ring->napi); 2842 kfree(adapter->tx_ring); 2843 kfree(adapter->rx_ring); 2844 2845 iounmap(hw->hw_addr); 2846 if (hw->flash_address) 2847 iounmap(hw->flash_address); 2848 pci_release_regions(pdev); 2849 2850 free_netdev(netdev); 2851 2852 pci_disable_device(pdev); 2853 } 2854 2855 /* PCI Error Recovery (ERS) */ 2856 static const struct pci_error_handlers igbvf_err_handler = { 2857 .error_detected = igbvf_io_error_detected, 2858 .slot_reset = igbvf_io_slot_reset, 2859 .resume = igbvf_io_resume, 2860 }; 2861 2862 static DEFINE_PCI_DEVICE_TABLE(igbvf_pci_tbl) = { 2863 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82576_VF), board_vf }, 2864 { PCI_VDEVICE(INTEL, E1000_DEV_ID_I350_VF), board_i350_vf }, 2865 { } /* terminate list */ 2866 }; 2867 MODULE_DEVICE_TABLE(pci, igbvf_pci_tbl); 2868 2869 /* PCI Device API Driver */ 2870 static struct pci_driver igbvf_driver = { 2871 .name = igbvf_driver_name, 2872 .id_table = igbvf_pci_tbl, 2873 .probe = igbvf_probe, 2874 .remove = igbvf_remove, 2875 #ifdef CONFIG_PM 2876 /* Power Management Hooks */ 2877 .suspend = igbvf_suspend, 2878 .resume = igbvf_resume, 2879 #endif 2880 .shutdown = igbvf_shutdown, 2881 .err_handler = &igbvf_err_handler 2882 }; 2883 2884 /** 2885 * igbvf_init_module - Driver Registration Routine 2886 * 2887 * igbvf_init_module is the first routine called when the driver is 2888 * loaded. All it does is register with the PCI subsystem. 2889 **/ 2890 static int __init igbvf_init_module(void) 2891 { 2892 int ret; 2893 pr_info("%s - version %s\n", igbvf_driver_string, igbvf_driver_version); 2894 pr_info("%s\n", igbvf_copyright); 2895 2896 ret = pci_register_driver(&igbvf_driver); 2897 2898 return ret; 2899 } 2900 module_init(igbvf_init_module); 2901 2902 /** 2903 * igbvf_exit_module - Driver Exit Cleanup Routine 2904 * 2905 * igbvf_exit_module is called just before the driver is removed 2906 * from memory. 2907 **/ 2908 static void __exit igbvf_exit_module(void) 2909 { 2910 pci_unregister_driver(&igbvf_driver); 2911 } 2912 module_exit(igbvf_exit_module); 2913 2914 2915 MODULE_AUTHOR("Intel Corporation, <e1000-devel@lists.sourceforge.net>"); 2916 MODULE_DESCRIPTION("Intel(R) Gigabit Virtual Function Network Driver"); 2917 MODULE_LICENSE("GPL"); 2918 MODULE_VERSION(DRV_VERSION); 2919 2920 /* netdev.c */ 2921