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, see <http://www.gnu.org/licenses/>. 17 18 The full GNU General Public License is included in this distribution in 19 the file called "COPYING". 20 21 Contact Information: 22 e1000-devel Mailing List <e1000-devel@lists.sourceforge.net> 23 Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 24 25*******************************************************************************/ 26 27#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 28 29#include <linux/module.h> 30#include <linux/types.h> 31#include <linux/init.h> 32#include <linux/pci.h> 33#include <linux/vmalloc.h> 34#include <linux/pagemap.h> 35#include <linux/delay.h> 36#include <linux/netdevice.h> 37#include <linux/tcp.h> 38#include <linux/ipv6.h> 39#include <linux/slab.h> 40#include <net/checksum.h> 41#include <net/ip6_checksum.h> 42#include <linux/mii.h> 43#include <linux/ethtool.h> 44#include <linux/if_vlan.h> 45#include <linux/prefetch.h> 46 47#include "igbvf.h" 48 49#define DRV_VERSION "2.0.2-k" 50char igbvf_driver_name[] = "igbvf"; 51const char igbvf_driver_version[] = DRV_VERSION; 52static const char igbvf_driver_string[] = 53 "Intel(R) Gigabit Virtual Function Network Driver"; 54static const char igbvf_copyright[] = 55 "Copyright (c) 2009 - 2012 Intel Corporation."; 56 57#define DEFAULT_MSG_ENABLE (NETIF_MSG_DRV|NETIF_MSG_PROBE|NETIF_MSG_LINK) 58static int debug = -1; 59module_param(debug, int, 0); 60MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)"); 61 62static int igbvf_poll(struct napi_struct *napi, int budget); 63static void igbvf_reset(struct igbvf_adapter *); 64static void igbvf_set_interrupt_capability(struct igbvf_adapter *); 65static void igbvf_reset_interrupt_capability(struct igbvf_adapter *); 66 67static struct igbvf_info igbvf_vf_info = { 68 .mac = e1000_vfadapt, 69 .flags = 0, 70 .pba = 10, 71 .init_ops = e1000_init_function_pointers_vf, 72}; 73 74static struct igbvf_info igbvf_i350_vf_info = { 75 .mac = e1000_vfadapt_i350, 76 .flags = 0, 77 .pba = 10, 78 .init_ops = e1000_init_function_pointers_vf, 79}; 80 81static const struct igbvf_info *igbvf_info_tbl[] = { 82 [board_vf] = &igbvf_vf_info, 83 [board_i350_vf] = &igbvf_i350_vf_info, 84}; 85 86/** 87 * igbvf_desc_unused - calculate if we have unused descriptors 88 * @rx_ring: address of receive ring structure 89 **/ 90static 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 **/ 105static 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, htons(ETH_P_8021Q), vid); 120 } 121 122 napi_gro_receive(&adapter->rx_ring->napi, skb); 123} 124 125static 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 **/ 155static 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 */ 224 if (adapter->rx_ps_hdr_size) { 225 rx_desc->read.pkt_addr = 226 cpu_to_le64(buffer_info->page_dma); 227 rx_desc->read.hdr_addr = cpu_to_le64(buffer_info->dma); 228 } else { 229 rx_desc->read.pkt_addr = 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 239no_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 */ 252 wmb(); 253 writel(i, adapter->hw.hw_addr + rx_ring->tail); 254 } 255} 256 257/** 258 * igbvf_clean_rx_irq - Send received data up the network stack; legacy 259 * @adapter: board private structure 260 * 261 * the return value indicates whether actual cleaning was done, there 262 * is no guarantee that everything was cleaned 263 **/ 264static bool igbvf_clean_rx_irq(struct igbvf_adapter *adapter, 265 int *work_done, int work_to_do) 266{ 267 struct igbvf_ring *rx_ring = adapter->rx_ring; 268 struct net_device *netdev = adapter->netdev; 269 struct pci_dev *pdev = adapter->pdev; 270 union e1000_adv_rx_desc *rx_desc, *next_rxd; 271 struct igbvf_buffer *buffer_info, *next_buffer; 272 struct sk_buff *skb; 273 bool cleaned = false; 274 int cleaned_count = 0; 275 unsigned int total_bytes = 0, total_packets = 0; 276 unsigned int i; 277 u32 length, hlen, staterr; 278 279 i = rx_ring->next_to_clean; 280 rx_desc = IGBVF_RX_DESC_ADV(*rx_ring, i); 281 staterr = le32_to_cpu(rx_desc->wb.upper.status_error); 282 283 while (staterr & E1000_RXD_STAT_DD) { 284 if (*work_done >= work_to_do) 285 break; 286 (*work_done)++; 287 rmb(); /* read descriptor and rx_buffer_info after status DD */ 288 289 buffer_info = &rx_ring->buffer_info[i]; 290 291 /* HW will not DMA in data larger than the given buffer, even 292 * if it parses the (NFS, of course) header to be larger. In 293 * that case, it fills the header buffer and spills the rest 294 * into the page. 295 */ 296 hlen = (le16_to_cpu(rx_desc->wb.lower.lo_dword.hs_rss.hdr_info) 297 & E1000_RXDADV_HDRBUFLEN_MASK) >> 298 E1000_RXDADV_HDRBUFLEN_SHIFT; 299 if (hlen > adapter->rx_ps_hdr_size) 300 hlen = adapter->rx_ps_hdr_size; 301 302 length = le16_to_cpu(rx_desc->wb.upper.length); 303 cleaned = true; 304 cleaned_count++; 305 306 skb = buffer_info->skb; 307 prefetch(skb->data - NET_IP_ALIGN); 308 buffer_info->skb = NULL; 309 if (!adapter->rx_ps_hdr_size) { 310 dma_unmap_single(&pdev->dev, buffer_info->dma, 311 adapter->rx_buffer_len, 312 DMA_FROM_DEVICE); 313 buffer_info->dma = 0; 314 skb_put(skb, length); 315 goto send_up; 316 } 317 318 if (!skb_shinfo(skb)->nr_frags) { 319 dma_unmap_single(&pdev->dev, buffer_info->dma, 320 adapter->rx_ps_hdr_size, 321 DMA_FROM_DEVICE); 322 skb_put(skb, hlen); 323 } 324 325 if (length) { 326 dma_unmap_page(&pdev->dev, buffer_info->page_dma, 327 PAGE_SIZE / 2, 328 DMA_FROM_DEVICE); 329 buffer_info->page_dma = 0; 330 331 skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags, 332 buffer_info->page, 333 buffer_info->page_offset, 334 length); 335 336 if ((adapter->rx_buffer_len > (PAGE_SIZE / 2)) || 337 (page_count(buffer_info->page) != 1)) 338 buffer_info->page = NULL; 339 else 340 get_page(buffer_info->page); 341 342 skb->len += length; 343 skb->data_len += length; 344 skb->truesize += PAGE_SIZE / 2; 345 } 346send_up: 347 i++; 348 if (i == rx_ring->count) 349 i = 0; 350 next_rxd = IGBVF_RX_DESC_ADV(*rx_ring, i); 351 prefetch(next_rxd); 352 next_buffer = &rx_ring->buffer_info[i]; 353 354 if (!(staterr & E1000_RXD_STAT_EOP)) { 355 buffer_info->skb = next_buffer->skb; 356 buffer_info->dma = next_buffer->dma; 357 next_buffer->skb = skb; 358 next_buffer->dma = 0; 359 goto next_desc; 360 } 361 362 if (staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK) { 363 dev_kfree_skb_irq(skb); 364 goto next_desc; 365 } 366 367 total_bytes += skb->len; 368 total_packets++; 369 370 igbvf_rx_checksum_adv(adapter, staterr, skb); 371 372 skb->protocol = eth_type_trans(skb, netdev); 373 374 igbvf_receive_skb(adapter, netdev, skb, staterr, 375 rx_desc->wb.upper.vlan); 376 377next_desc: 378 rx_desc->wb.upper.status_error = 0; 379 380 /* return some buffers to hardware, one at a time is too slow */ 381 if (cleaned_count >= IGBVF_RX_BUFFER_WRITE) { 382 igbvf_alloc_rx_buffers(rx_ring, cleaned_count); 383 cleaned_count = 0; 384 } 385 386 /* use prefetched values */ 387 rx_desc = next_rxd; 388 buffer_info = next_buffer; 389 390 staterr = le32_to_cpu(rx_desc->wb.upper.status_error); 391 } 392 393 rx_ring->next_to_clean = i; 394 cleaned_count = igbvf_desc_unused(rx_ring); 395 396 if (cleaned_count) 397 igbvf_alloc_rx_buffers(rx_ring, cleaned_count); 398 399 adapter->total_rx_packets += total_packets; 400 adapter->total_rx_bytes += total_bytes; 401 adapter->net_stats.rx_bytes += total_bytes; 402 adapter->net_stats.rx_packets += total_packets; 403 return cleaned; 404} 405 406static void igbvf_put_txbuf(struct igbvf_adapter *adapter, 407 struct igbvf_buffer *buffer_info) 408{ 409 if (buffer_info->dma) { 410 if (buffer_info->mapped_as_page) 411 dma_unmap_page(&adapter->pdev->dev, 412 buffer_info->dma, 413 buffer_info->length, 414 DMA_TO_DEVICE); 415 else 416 dma_unmap_single(&adapter->pdev->dev, 417 buffer_info->dma, 418 buffer_info->length, 419 DMA_TO_DEVICE); 420 buffer_info->dma = 0; 421 } 422 if (buffer_info->skb) { 423 dev_kfree_skb_any(buffer_info->skb); 424 buffer_info->skb = NULL; 425 } 426 buffer_info->time_stamp = 0; 427} 428 429/** 430 * igbvf_setup_tx_resources - allocate Tx resources (Descriptors) 431 * @adapter: board private structure 432 * 433 * Return 0 on success, negative on failure 434 **/ 435int igbvf_setup_tx_resources(struct igbvf_adapter *adapter, 436 struct igbvf_ring *tx_ring) 437{ 438 struct pci_dev *pdev = adapter->pdev; 439 int size; 440 441 size = sizeof(struct igbvf_buffer) * tx_ring->count; 442 tx_ring->buffer_info = vzalloc(size); 443 if (!tx_ring->buffer_info) 444 goto err; 445 446 /* round up to nearest 4K */ 447 tx_ring->size = tx_ring->count * sizeof(union e1000_adv_tx_desc); 448 tx_ring->size = ALIGN(tx_ring->size, 4096); 449 450 tx_ring->desc = dma_alloc_coherent(&pdev->dev, tx_ring->size, 451 &tx_ring->dma, GFP_KERNEL); 452 if (!tx_ring->desc) 453 goto err; 454 455 tx_ring->adapter = adapter; 456 tx_ring->next_to_use = 0; 457 tx_ring->next_to_clean = 0; 458 459 return 0; 460err: 461 vfree(tx_ring->buffer_info); 462 dev_err(&adapter->pdev->dev, 463 "Unable to allocate memory for the transmit descriptor ring\n"); 464 return -ENOMEM; 465} 466 467/** 468 * igbvf_setup_rx_resources - allocate Rx resources (Descriptors) 469 * @adapter: board private structure 470 * 471 * Returns 0 on success, negative on failure 472 **/ 473int igbvf_setup_rx_resources(struct igbvf_adapter *adapter, 474 struct igbvf_ring *rx_ring) 475{ 476 struct pci_dev *pdev = adapter->pdev; 477 int size, desc_len; 478 479 size = sizeof(struct igbvf_buffer) * rx_ring->count; 480 rx_ring->buffer_info = vzalloc(size); 481 if (!rx_ring->buffer_info) 482 goto err; 483 484 desc_len = sizeof(union e1000_adv_rx_desc); 485 486 /* Round up to nearest 4K */ 487 rx_ring->size = rx_ring->count * desc_len; 488 rx_ring->size = ALIGN(rx_ring->size, 4096); 489 490 rx_ring->desc = dma_alloc_coherent(&pdev->dev, rx_ring->size, 491 &rx_ring->dma, GFP_KERNEL); 492 if (!rx_ring->desc) 493 goto err; 494 495 rx_ring->next_to_clean = 0; 496 rx_ring->next_to_use = 0; 497 498 rx_ring->adapter = adapter; 499 500 return 0; 501 502err: 503 vfree(rx_ring->buffer_info); 504 rx_ring->buffer_info = NULL; 505 dev_err(&adapter->pdev->dev, 506 "Unable to allocate memory for the receive descriptor ring\n"); 507 return -ENOMEM; 508} 509 510/** 511 * igbvf_clean_tx_ring - Free Tx Buffers 512 * @tx_ring: ring to be cleaned 513 **/ 514static void igbvf_clean_tx_ring(struct igbvf_ring *tx_ring) 515{ 516 struct igbvf_adapter *adapter = tx_ring->adapter; 517 struct igbvf_buffer *buffer_info; 518 unsigned long size; 519 unsigned int i; 520 521 if (!tx_ring->buffer_info) 522 return; 523 524 /* Free all the Tx ring sk_buffs */ 525 for (i = 0; i < tx_ring->count; i++) { 526 buffer_info = &tx_ring->buffer_info[i]; 527 igbvf_put_txbuf(adapter, buffer_info); 528 } 529 530 size = sizeof(struct igbvf_buffer) * tx_ring->count; 531 memset(tx_ring->buffer_info, 0, size); 532 533 /* Zero out the descriptor ring */ 534 memset(tx_ring->desc, 0, tx_ring->size); 535 536 tx_ring->next_to_use = 0; 537 tx_ring->next_to_clean = 0; 538 539 writel(0, adapter->hw.hw_addr + tx_ring->head); 540 writel(0, adapter->hw.hw_addr + tx_ring->tail); 541} 542 543/** 544 * igbvf_free_tx_resources - Free Tx Resources per Queue 545 * @tx_ring: ring to free resources from 546 * 547 * Free all transmit software resources 548 **/ 549void igbvf_free_tx_resources(struct igbvf_ring *tx_ring) 550{ 551 struct pci_dev *pdev = tx_ring->adapter->pdev; 552 553 igbvf_clean_tx_ring(tx_ring); 554 555 vfree(tx_ring->buffer_info); 556 tx_ring->buffer_info = NULL; 557 558 dma_free_coherent(&pdev->dev, tx_ring->size, tx_ring->desc, 559 tx_ring->dma); 560 561 tx_ring->desc = NULL; 562} 563 564/** 565 * igbvf_clean_rx_ring - Free Rx Buffers per Queue 566 * @adapter: board private structure 567 **/ 568static void igbvf_clean_rx_ring(struct igbvf_ring *rx_ring) 569{ 570 struct igbvf_adapter *adapter = rx_ring->adapter; 571 struct igbvf_buffer *buffer_info; 572 struct pci_dev *pdev = adapter->pdev; 573 unsigned long size; 574 unsigned int i; 575 576 if (!rx_ring->buffer_info) 577 return; 578 579 /* Free all the Rx ring sk_buffs */ 580 for (i = 0; i < rx_ring->count; i++) { 581 buffer_info = &rx_ring->buffer_info[i]; 582 if (buffer_info->dma) { 583 if (adapter->rx_ps_hdr_size) { 584 dma_unmap_single(&pdev->dev, buffer_info->dma, 585 adapter->rx_ps_hdr_size, 586 DMA_FROM_DEVICE); 587 } else { 588 dma_unmap_single(&pdev->dev, buffer_info->dma, 589 adapter->rx_buffer_len, 590 DMA_FROM_DEVICE); 591 } 592 buffer_info->dma = 0; 593 } 594 595 if (buffer_info->skb) { 596 dev_kfree_skb(buffer_info->skb); 597 buffer_info->skb = NULL; 598 } 599 600 if (buffer_info->page) { 601 if (buffer_info->page_dma) 602 dma_unmap_page(&pdev->dev, 603 buffer_info->page_dma, 604 PAGE_SIZE / 2, 605 DMA_FROM_DEVICE); 606 put_page(buffer_info->page); 607 buffer_info->page = NULL; 608 buffer_info->page_dma = 0; 609 buffer_info->page_offset = 0; 610 } 611 } 612 613 size = sizeof(struct igbvf_buffer) * rx_ring->count; 614 memset(rx_ring->buffer_info, 0, size); 615 616 /* Zero out the descriptor ring */ 617 memset(rx_ring->desc, 0, rx_ring->size); 618 619 rx_ring->next_to_clean = 0; 620 rx_ring->next_to_use = 0; 621 622 writel(0, adapter->hw.hw_addr + rx_ring->head); 623 writel(0, adapter->hw.hw_addr + rx_ring->tail); 624} 625 626/** 627 * igbvf_free_rx_resources - Free Rx Resources 628 * @rx_ring: ring to clean the resources from 629 * 630 * Free all receive software resources 631 **/ 632 633void igbvf_free_rx_resources(struct igbvf_ring *rx_ring) 634{ 635 struct pci_dev *pdev = rx_ring->adapter->pdev; 636 637 igbvf_clean_rx_ring(rx_ring); 638 639 vfree(rx_ring->buffer_info); 640 rx_ring->buffer_info = NULL; 641 642 dma_free_coherent(&pdev->dev, rx_ring->size, rx_ring->desc, 643 rx_ring->dma); 644 rx_ring->desc = NULL; 645} 646 647/** 648 * igbvf_update_itr - update the dynamic ITR value based on statistics 649 * @adapter: pointer to adapter 650 * @itr_setting: current adapter->itr 651 * @packets: the number of packets during this measurement interval 652 * @bytes: the number of bytes during this measurement interval 653 * 654 * Stores a new ITR value based on packets and byte counts during the last 655 * interrupt. The advantage of per interrupt computation is faster updates 656 * and more accurate ITR for the current traffic pattern. Constants in this 657 * function were computed based on theoretical maximum wire speed and thresholds 658 * were set based on testing data as well as attempting to minimize response 659 * time while increasing bulk throughput. 660 **/ 661static enum latency_range igbvf_update_itr(struct igbvf_adapter *adapter, 662 enum latency_range itr_setting, 663 int packets, int bytes) 664{ 665 enum latency_range retval = itr_setting; 666 667 if (packets == 0) 668 goto update_itr_done; 669 670 switch (itr_setting) { 671 case lowest_latency: 672 /* handle TSO and jumbo frames */ 673 if (bytes/packets > 8000) 674 retval = bulk_latency; 675 else if ((packets < 5) && (bytes > 512)) 676 retval = low_latency; 677 break; 678 case low_latency: /* 50 usec aka 20000 ints/s */ 679 if (bytes > 10000) { 680 /* this if handles the TSO accounting */ 681 if (bytes/packets > 8000) 682 retval = bulk_latency; 683 else if ((packets < 10) || ((bytes/packets) > 1200)) 684 retval = bulk_latency; 685 else if ((packets > 35)) 686 retval = lowest_latency; 687 } else if (bytes/packets > 2000) { 688 retval = bulk_latency; 689 } else if (packets <= 2 && bytes < 512) { 690 retval = lowest_latency; 691 } 692 break; 693 case bulk_latency: /* 250 usec aka 4000 ints/s */ 694 if (bytes > 25000) { 695 if (packets > 35) 696 retval = low_latency; 697 } else if (bytes < 6000) { 698 retval = low_latency; 699 } 700 break; 701 default: 702 break; 703 } 704 705update_itr_done: 706 return retval; 707} 708 709static int igbvf_range_to_itr(enum latency_range current_range) 710{ 711 int new_itr; 712 713 switch (current_range) { 714 /* counts and packets in update_itr are dependent on these numbers */ 715 case lowest_latency: 716 new_itr = IGBVF_70K_ITR; 717 break; 718 case low_latency: 719 new_itr = IGBVF_20K_ITR; 720 break; 721 case bulk_latency: 722 new_itr = IGBVF_4K_ITR; 723 break; 724 default: 725 new_itr = IGBVF_START_ITR; 726 break; 727 } 728 return new_itr; 729} 730 731static void igbvf_set_itr(struct igbvf_adapter *adapter) 732{ 733 u32 new_itr; 734 735 adapter->tx_ring->itr_range = 736 igbvf_update_itr(adapter, 737 adapter->tx_ring->itr_val, 738 adapter->total_tx_packets, 739 adapter->total_tx_bytes); 740 741 /* conservative mode (itr 3) eliminates the lowest_latency setting */ 742 if (adapter->requested_itr == 3 && 743 adapter->tx_ring->itr_range == lowest_latency) 744 adapter->tx_ring->itr_range = low_latency; 745 746 new_itr = igbvf_range_to_itr(adapter->tx_ring->itr_range); 747 748 if (new_itr != adapter->tx_ring->itr_val) { 749 u32 current_itr = adapter->tx_ring->itr_val; 750 /* this attempts to bias the interrupt rate towards Bulk 751 * by adding intermediate steps when interrupt rate is 752 * increasing 753 */ 754 new_itr = new_itr > current_itr ? 755 min(current_itr + (new_itr >> 2), new_itr) : 756 new_itr; 757 adapter->tx_ring->itr_val = new_itr; 758 759 adapter->tx_ring->set_itr = 1; 760 } 761 762 adapter->rx_ring->itr_range = 763 igbvf_update_itr(adapter, adapter->rx_ring->itr_val, 764 adapter->total_rx_packets, 765 adapter->total_rx_bytes); 766 if (adapter->requested_itr == 3 && 767 adapter->rx_ring->itr_range == lowest_latency) 768 adapter->rx_ring->itr_range = low_latency; 769 770 new_itr = igbvf_range_to_itr(adapter->rx_ring->itr_range); 771 772 if (new_itr != adapter->rx_ring->itr_val) { 773 u32 current_itr = adapter->rx_ring->itr_val; 774 775 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 **/ 790static 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 && netif_carrier_ok(netdev) && 853 igbvf_desc_unused(tx_ring) >= IGBVF_TX_QUEUE_WAKE)) { 854 /* Make sure that anybody stopping the queue after this 855 * sees the new next_to_clean. 856 */ 857 smp_mb(); 858 if (netif_queue_stopped(netdev) && 859 !(test_bit(__IGBVF_DOWN, &adapter->state))) { 860 netif_wake_queue(netdev); 861 ++adapter->restart_queue; 862 } 863 } 864 865 adapter->net_stats.tx_bytes += total_bytes; 866 adapter->net_stats.tx_packets += total_packets; 867 return count < tx_ring->count; 868} 869 870static irqreturn_t igbvf_msix_other(int irq, void *data) 871{ 872 struct net_device *netdev = data; 873 struct igbvf_adapter *adapter = netdev_priv(netdev); 874 struct e1000_hw *hw = &adapter->hw; 875 876 adapter->int_counter1++; 877 878 netif_carrier_off(netdev); 879 hw->mac.get_link_status = 1; 880 if (!test_bit(__IGBVF_DOWN, &adapter->state)) 881 mod_timer(&adapter->watchdog_timer, jiffies + 1); 882 883 ew32(EIMS, adapter->eims_other); 884 885 return IRQ_HANDLED; 886} 887 888static irqreturn_t igbvf_intr_msix_tx(int irq, void *data) 889{ 890 struct net_device *netdev = data; 891 struct igbvf_adapter *adapter = netdev_priv(netdev); 892 struct e1000_hw *hw = &adapter->hw; 893 struct igbvf_ring *tx_ring = adapter->tx_ring; 894 895 if (tx_ring->set_itr) { 896 writel(tx_ring->itr_val, 897 adapter->hw.hw_addr + tx_ring->itr_register); 898 adapter->tx_ring->set_itr = 0; 899 } 900 901 adapter->total_tx_bytes = 0; 902 adapter->total_tx_packets = 0; 903 904 /* auto mask will automatically re-enable the interrupt when we write 905 * EICS 906 */ 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 916static 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 943static 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 */ 954 if (rx_queue > IGBVF_NO_QUEUE) { 955 index = (rx_queue >> 1); 956 ivar = array_er32(IVAR0, index); 957 if (rx_queue & 0x1) { 958 /* vector goes into third byte of register */ 959 ivar = ivar & 0xFF00FFFF; 960 ivar |= (msix_vector | E1000_IVAR_VALID) << 16; 961 } else { 962 /* vector goes into low byte of register */ 963 ivar = ivar & 0xFFFFFF00; 964 ivar |= msix_vector | E1000_IVAR_VALID; 965 } 966 adapter->rx_ring[rx_queue].eims_value = 1 << msix_vector; 967 array_ew32(IVAR0, index, ivar); 968 } 969 if (tx_queue > IGBVF_NO_QUEUE) { 970 index = (tx_queue >> 1); 971 ivar = array_er32(IVAR0, index); 972 if (tx_queue & 0x1) { 973 /* vector goes into high byte of register */ 974 ivar = ivar & 0x00FFFFFF; 975 ivar |= (msix_vector | E1000_IVAR_VALID) << 24; 976 } else { 977 /* vector goes into second byte of register */ 978 ivar = ivar & 0xFFFF00FF; 979 ivar |= (msix_vector | E1000_IVAR_VALID) << 8; 980 } 981 adapter->tx_ring[tx_queue].eims_value = 1 << msix_vector; 982 array_ew32(IVAR0, index, ivar); 983 } 984} 985 986/** 987 * igbvf_configure_msix - Configure MSI-X hardware 988 * @adapter: board private structure 989 * 990 * igbvf_configure_msix sets up the hardware to properly 991 * generate MSI-X interrupts. 992 **/ 993static void igbvf_configure_msix(struct igbvf_adapter *adapter) 994{ 995 u32 tmp; 996 struct e1000_hw *hw = &adapter->hw; 997 struct igbvf_ring *tx_ring = adapter->tx_ring; 998 struct igbvf_ring *rx_ring = adapter->rx_ring; 999 int vector = 0; 1000 1001 adapter->eims_enable_mask = 0; 1002 1003 igbvf_assign_vector(adapter, IGBVF_NO_QUEUE, 0, vector++); 1004 adapter->eims_enable_mask |= tx_ring->eims_value; 1005 writel(tx_ring->itr_val, hw->hw_addr + tx_ring->itr_register); 1006 igbvf_assign_vector(adapter, 0, IGBVF_NO_QUEUE, vector++); 1007 adapter->eims_enable_mask |= rx_ring->eims_value; 1008 writel(rx_ring->itr_val, hw->hw_addr + rx_ring->itr_register); 1009 1010 /* set vector for other causes, i.e. link changes */ 1011 1012 tmp = (vector++ | E1000_IVAR_VALID); 1013 1014 ew32(IVAR_MISC, tmp); 1015 1016 adapter->eims_enable_mask = (1 << (vector)) - 1; 1017 adapter->eims_other = 1 << (vector - 1); 1018 e1e_flush(); 1019} 1020 1021static void igbvf_reset_interrupt_capability(struct igbvf_adapter *adapter) 1022{ 1023 if (adapter->msix_entries) { 1024 pci_disable_msix(adapter->pdev); 1025 kfree(adapter->msix_entries); 1026 adapter->msix_entries = NULL; 1027 } 1028} 1029 1030/** 1031 * igbvf_set_interrupt_capability - set MSI or MSI-X if supported 1032 * @adapter: board private structure 1033 * 1034 * Attempt to configure interrupts using the best available 1035 * capabilities of the hardware and kernel. 1036 **/ 1037static void igbvf_set_interrupt_capability(struct igbvf_adapter *adapter) 1038{ 1039 int err = -ENOMEM; 1040 int i; 1041 1042 /* we allocate 3 vectors, 1 for Tx, 1 for Rx, one for PF messages */ 1043 adapter->msix_entries = kcalloc(3, sizeof(struct msix_entry), 1044 GFP_KERNEL); 1045 if (adapter->msix_entries) { 1046 for (i = 0; i < 3; i++) 1047 adapter->msix_entries[i].entry = i; 1048 1049 err = pci_enable_msix_range(adapter->pdev, 1050 adapter->msix_entries, 3, 3); 1051 } 1052 1053 if (err < 0) { 1054 /* MSI-X failed */ 1055 dev_err(&adapter->pdev->dev, 1056 "Failed to initialize MSI-X interrupts.\n"); 1057 igbvf_reset_interrupt_capability(adapter); 1058 } 1059} 1060 1061/** 1062 * igbvf_request_msix - Initialize MSI-X interrupts 1063 * @adapter: board private structure 1064 * 1065 * igbvf_request_msix allocates MSI-X vectors and requests interrupts from the 1066 * kernel. 1067 **/ 1068static int igbvf_request_msix(struct igbvf_adapter *adapter) 1069{ 1070 struct net_device *netdev = adapter->netdev; 1071 int err = 0, vector = 0; 1072 1073 if (strlen(netdev->name) < (IFNAMSIZ - 5)) { 1074 sprintf(adapter->tx_ring->name, "%s-tx-0", netdev->name); 1075 sprintf(adapter->rx_ring->name, "%s-rx-0", netdev->name); 1076 } else { 1077 memcpy(adapter->tx_ring->name, netdev->name, IFNAMSIZ); 1078 memcpy(adapter->rx_ring->name, netdev->name, IFNAMSIZ); 1079 } 1080 1081 err = request_irq(adapter->msix_entries[vector].vector, 1082 igbvf_intr_msix_tx, 0, adapter->tx_ring->name, 1083 netdev); 1084 if (err) 1085 goto out; 1086 1087 adapter->tx_ring->itr_register = E1000_EITR(vector); 1088 adapter->tx_ring->itr_val = adapter->current_itr; 1089 vector++; 1090 1091 err = request_irq(adapter->msix_entries[vector].vector, 1092 igbvf_intr_msix_rx, 0, adapter->rx_ring->name, 1093 netdev); 1094 if (err) 1095 goto out; 1096 1097 adapter->rx_ring->itr_register = E1000_EITR(vector); 1098 adapter->rx_ring->itr_val = adapter->current_itr; 1099 vector++; 1100 1101 err = request_irq(adapter->msix_entries[vector].vector, 1102 igbvf_msix_other, 0, netdev->name, netdev); 1103 if (err) 1104 goto out; 1105 1106 igbvf_configure_msix(adapter); 1107 return 0; 1108out: 1109 return err; 1110} 1111 1112/** 1113 * igbvf_alloc_queues - Allocate memory for all rings 1114 * @adapter: board private structure to initialize 1115 **/ 1116static int igbvf_alloc_queues(struct igbvf_adapter *adapter) 1117{ 1118 struct net_device *netdev = adapter->netdev; 1119 1120 adapter->tx_ring = kzalloc(sizeof(struct igbvf_ring), GFP_KERNEL); 1121 if (!adapter->tx_ring) 1122 return -ENOMEM; 1123 1124 adapter->rx_ring = kzalloc(sizeof(struct igbvf_ring), GFP_KERNEL); 1125 if (!adapter->rx_ring) { 1126 kfree(adapter->tx_ring); 1127 return -ENOMEM; 1128 } 1129 1130 netif_napi_add(netdev, &adapter->rx_ring->napi, igbvf_poll, 64); 1131 1132 return 0; 1133} 1134 1135/** 1136 * igbvf_request_irq - initialize interrupts 1137 * @adapter: board private structure 1138 * 1139 * Attempts to configure interrupts using the best available 1140 * capabilities of the hardware and kernel. 1141 **/ 1142static int igbvf_request_irq(struct igbvf_adapter *adapter) 1143{ 1144 int err = -1; 1145 1146 /* igbvf supports msi-x only */ 1147 if (adapter->msix_entries) 1148 err = igbvf_request_msix(adapter); 1149 1150 if (!err) 1151 return err; 1152 1153 dev_err(&adapter->pdev->dev, 1154 "Unable to allocate interrupt, Error: %d\n", err); 1155 1156 return err; 1157} 1158 1159static void igbvf_free_irq(struct igbvf_adapter *adapter) 1160{ 1161 struct net_device *netdev = adapter->netdev; 1162 int vector; 1163 1164 if (adapter->msix_entries) { 1165 for (vector = 0; vector < 3; vector++) 1166 free_irq(adapter->msix_entries[vector].vector, netdev); 1167 } 1168} 1169 1170/** 1171 * igbvf_irq_disable - Mask off interrupt generation on the NIC 1172 * @adapter: board private structure 1173 **/ 1174static void igbvf_irq_disable(struct igbvf_adapter *adapter) 1175{ 1176 struct e1000_hw *hw = &adapter->hw; 1177 1178 ew32(EIMC, ~0); 1179 1180 if (adapter->msix_entries) 1181 ew32(EIAC, 0); 1182} 1183 1184/** 1185 * igbvf_irq_enable - Enable default interrupt generation settings 1186 * @adapter: board private structure 1187 **/ 1188static void igbvf_irq_enable(struct igbvf_adapter *adapter) 1189{ 1190 struct e1000_hw *hw = &adapter->hw; 1191 1192 ew32(EIAC, adapter->eims_enable_mask); 1193 ew32(EIAM, adapter->eims_enable_mask); 1194 ew32(EIMS, adapter->eims_enable_mask); 1195} 1196 1197/** 1198 * igbvf_poll - NAPI Rx polling callback 1199 * @napi: struct associated with this polling callback 1200 * @budget: amount of packets driver is allowed to process this poll 1201 **/ 1202static int igbvf_poll(struct napi_struct *napi, int budget) 1203{ 1204 struct igbvf_ring *rx_ring = container_of(napi, struct igbvf_ring, napi); 1205 struct igbvf_adapter *adapter = rx_ring->adapter; 1206 struct e1000_hw *hw = &adapter->hw; 1207 int work_done = 0; 1208 1209 igbvf_clean_rx_irq(adapter, &work_done, budget); 1210 1211 /* If not enough Rx work done, exit the polling mode */ 1212 if (work_done < budget) { 1213 napi_complete(napi); 1214 1215 if (adapter->requested_itr & 3) 1216 igbvf_set_itr(adapter); 1217 1218 if (!test_bit(__IGBVF_DOWN, &adapter->state)) 1219 ew32(EIMS, adapter->rx_ring->eims_value); 1220 } 1221 1222 return work_done; 1223} 1224 1225/** 1226 * igbvf_set_rlpml - set receive large packet maximum length 1227 * @adapter: board private structure 1228 * 1229 * Configure the maximum size of packets that will be received 1230 */ 1231static void igbvf_set_rlpml(struct igbvf_adapter *adapter) 1232{ 1233 int max_frame_size; 1234 struct e1000_hw *hw = &adapter->hw; 1235 1236 max_frame_size = adapter->max_frame_size + VLAN_TAG_SIZE; 1237 e1000_rlpml_set_vf(hw, max_frame_size); 1238} 1239 1240static int igbvf_vlan_rx_add_vid(struct net_device *netdev, 1241 __be16 proto, u16 vid) 1242{ 1243 struct igbvf_adapter *adapter = netdev_priv(netdev); 1244 struct e1000_hw *hw = &adapter->hw; 1245 1246 if (hw->mac.ops.set_vfta(hw, vid, true)) { 1247 dev_err(&adapter->pdev->dev, "Failed to add vlan id %d\n", vid); 1248 return -EINVAL; 1249 } 1250 set_bit(vid, adapter->active_vlans); 1251 return 0; 1252} 1253 1254static int igbvf_vlan_rx_kill_vid(struct net_device *netdev, 1255 __be16 proto, u16 vid) 1256{ 1257 struct igbvf_adapter *adapter = netdev_priv(netdev); 1258 struct e1000_hw *hw = &adapter->hw; 1259 1260 if (hw->mac.ops.set_vfta(hw, vid, false)) { 1261 dev_err(&adapter->pdev->dev, 1262 "Failed to remove vlan id %d\n", vid); 1263 return -EINVAL; 1264 } 1265 clear_bit(vid, adapter->active_vlans); 1266 return 0; 1267} 1268 1269static void igbvf_restore_vlan(struct igbvf_adapter *adapter) 1270{ 1271 u16 vid; 1272 1273 for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID) 1274 igbvf_vlan_rx_add_vid(adapter->netdev, htons(ETH_P_8021Q), vid); 1275} 1276 1277/** 1278 * igbvf_configure_tx - Configure Transmit Unit after Reset 1279 * @adapter: board private structure 1280 * 1281 * Configure the Tx unit of the MAC after a reset. 1282 **/ 1283static void igbvf_configure_tx(struct igbvf_adapter *adapter) 1284{ 1285 struct e1000_hw *hw = &adapter->hw; 1286 struct igbvf_ring *tx_ring = adapter->tx_ring; 1287 u64 tdba; 1288 u32 txdctl, dca_txctrl; 1289 1290 /* disable transmits */ 1291 txdctl = er32(TXDCTL(0)); 1292 ew32(TXDCTL(0), txdctl & ~E1000_TXDCTL_QUEUE_ENABLE); 1293 e1e_flush(); 1294 msleep(10); 1295 1296 /* Setup the HW Tx Head and Tail descriptor pointers */ 1297 ew32(TDLEN(0), tx_ring->count * sizeof(union e1000_adv_tx_desc)); 1298 tdba = tx_ring->dma; 1299 ew32(TDBAL(0), (tdba & DMA_BIT_MASK(32))); 1300 ew32(TDBAH(0), (tdba >> 32)); 1301 ew32(TDH(0), 0); 1302 ew32(TDT(0), 0); 1303 tx_ring->head = E1000_TDH(0); 1304 tx_ring->tail = E1000_TDT(0); 1305 1306 /* Turn off Relaxed Ordering on head write-backs. The writebacks 1307 * MUST be delivered in order or it will completely screw up 1308 * our bookkeeping. 1309 */ 1310 dca_txctrl = er32(DCA_TXCTRL(0)); 1311 dca_txctrl &= ~E1000_DCA_TXCTRL_TX_WB_RO_EN; 1312 ew32(DCA_TXCTRL(0), dca_txctrl); 1313 1314 /* enable transmits */ 1315 txdctl |= E1000_TXDCTL_QUEUE_ENABLE; 1316 ew32(TXDCTL(0), txdctl); 1317 1318 /* Setup Transmit Descriptor Settings for eop descriptor */ 1319 adapter->txd_cmd = E1000_ADVTXD_DCMD_EOP | E1000_ADVTXD_DCMD_IFCS; 1320 1321 /* enable Report Status bit */ 1322 adapter->txd_cmd |= E1000_ADVTXD_DCMD_RS; 1323} 1324 1325/** 1326 * igbvf_setup_srrctl - configure the receive control registers 1327 * @adapter: Board private structure 1328 **/ 1329static void igbvf_setup_srrctl(struct igbvf_adapter *adapter) 1330{ 1331 struct e1000_hw *hw = &adapter->hw; 1332 u32 srrctl = 0; 1333 1334 srrctl &= ~(E1000_SRRCTL_DESCTYPE_MASK | 1335 E1000_SRRCTL_BSIZEHDR_MASK | 1336 E1000_SRRCTL_BSIZEPKT_MASK); 1337 1338 /* Enable queue drop to avoid head of line blocking */ 1339 srrctl |= E1000_SRRCTL_DROP_EN; 1340 1341 /* Setup buffer sizes */ 1342 srrctl |= ALIGN(adapter->rx_buffer_len, 1024) >> 1343 E1000_SRRCTL_BSIZEPKT_SHIFT; 1344 1345 if (adapter->rx_buffer_len < 2048) { 1346 adapter->rx_ps_hdr_size = 0; 1347 srrctl |= E1000_SRRCTL_DESCTYPE_ADV_ONEBUF; 1348 } else { 1349 adapter->rx_ps_hdr_size = 128; 1350 srrctl |= adapter->rx_ps_hdr_size << 1351 E1000_SRRCTL_BSIZEHDRSIZE_SHIFT; 1352 srrctl |= E1000_SRRCTL_DESCTYPE_HDR_SPLIT_ALWAYS; 1353 } 1354 1355 ew32(SRRCTL(0), srrctl); 1356} 1357 1358/** 1359 * igbvf_configure_rx - Configure Receive Unit after Reset 1360 * @adapter: board private structure 1361 * 1362 * Configure the Rx unit of the MAC after a reset. 1363 **/ 1364static void igbvf_configure_rx(struct igbvf_adapter *adapter) 1365{ 1366 struct e1000_hw *hw = &adapter->hw; 1367 struct igbvf_ring *rx_ring = adapter->rx_ring; 1368 u64 rdba; 1369 u32 rdlen, rxdctl; 1370 1371 /* disable receives */ 1372 rxdctl = er32(RXDCTL(0)); 1373 ew32(RXDCTL(0), rxdctl & ~E1000_RXDCTL_QUEUE_ENABLE); 1374 e1e_flush(); 1375 msleep(10); 1376 1377 rdlen = rx_ring->count * sizeof(union e1000_adv_rx_desc); 1378 1379 /* Setup the HW Rx Head and Tail Descriptor Pointers and 1380 * the Base and Length of the Rx Descriptor Ring 1381 */ 1382 rdba = rx_ring->dma; 1383 ew32(RDBAL(0), (rdba & DMA_BIT_MASK(32))); 1384 ew32(RDBAH(0), (rdba >> 32)); 1385 ew32(RDLEN(0), rx_ring->count * sizeof(union e1000_adv_rx_desc)); 1386 rx_ring->head = E1000_RDH(0); 1387 rx_ring->tail = E1000_RDT(0); 1388 ew32(RDH(0), 0); 1389 ew32(RDT(0), 0); 1390 1391 rxdctl |= E1000_RXDCTL_QUEUE_ENABLE; 1392 rxdctl &= 0xFFF00000; 1393 rxdctl |= IGBVF_RX_PTHRESH; 1394 rxdctl |= IGBVF_RX_HTHRESH << 8; 1395 rxdctl |= IGBVF_RX_WTHRESH << 16; 1396 1397 igbvf_set_rlpml(adapter); 1398 1399 /* enable receives */ 1400 ew32(RXDCTL(0), rxdctl); 1401} 1402 1403/** 1404 * igbvf_set_multi - Multicast and Promiscuous mode set 1405 * @netdev: network interface device structure 1406 * 1407 * The set_multi entry point is called whenever the multicast address 1408 * list or the network interface flags are updated. This routine is 1409 * responsible for configuring the hardware for proper multicast, 1410 * promiscuous mode, and all-multi behavior. 1411 **/ 1412static void igbvf_set_multi(struct net_device *netdev) 1413{ 1414 struct igbvf_adapter *adapter = netdev_priv(netdev); 1415 struct e1000_hw *hw = &adapter->hw; 1416 struct netdev_hw_addr *ha; 1417 u8 *mta_list = NULL; 1418 int i; 1419 1420 if (!netdev_mc_empty(netdev)) { 1421 mta_list = kmalloc_array(netdev_mc_count(netdev), ETH_ALEN, 1422 GFP_ATOMIC); 1423 if (!mta_list) 1424 return; 1425 } 1426 1427 /* prepare a packed array of only addresses. */ 1428 i = 0; 1429 netdev_for_each_mc_addr(ha, netdev) 1430 memcpy(mta_list + (i++ * ETH_ALEN), ha->addr, ETH_ALEN); 1431 1432 hw->mac.ops.update_mc_addr_list(hw, mta_list, i, 0, 0); 1433 kfree(mta_list); 1434} 1435 1436/** 1437 * igbvf_configure - configure the hardware for Rx and Tx 1438 * @adapter: private board structure 1439 **/ 1440static void igbvf_configure(struct igbvf_adapter *adapter) 1441{ 1442 igbvf_set_multi(adapter->netdev); 1443 1444 igbvf_restore_vlan(adapter); 1445 1446 igbvf_configure_tx(adapter); 1447 igbvf_setup_srrctl(adapter); 1448 igbvf_configure_rx(adapter); 1449 igbvf_alloc_rx_buffers(adapter->rx_ring, 1450 igbvf_desc_unused(adapter->rx_ring)); 1451} 1452 1453/* igbvf_reset - bring the hardware into a known good state 1454 * @adapter: private board structure 1455 * 1456 * This function boots the hardware and enables some settings that 1457 * require a configuration cycle of the hardware - those cannot be 1458 * set/changed during runtime. After reset the device needs to be 1459 * properly configured for Rx, Tx etc. 1460 */ 1461static void igbvf_reset(struct igbvf_adapter *adapter) 1462{ 1463 struct e1000_mac_info *mac = &adapter->hw.mac; 1464 struct net_device *netdev = adapter->netdev; 1465 struct e1000_hw *hw = &adapter->hw; 1466 1467 /* Allow time for pending master requests to run */ 1468 if (mac->ops.reset_hw(hw)) 1469 dev_err(&adapter->pdev->dev, "PF still resetting\n"); 1470 1471 mac->ops.init_hw(hw); 1472 1473 if (is_valid_ether_addr(adapter->hw.mac.addr)) { 1474 memcpy(netdev->dev_addr, adapter->hw.mac.addr, 1475 netdev->addr_len); 1476 memcpy(netdev->perm_addr, adapter->hw.mac.addr, 1477 netdev->addr_len); 1478 } 1479 1480 adapter->last_reset = jiffies; 1481} 1482 1483int igbvf_up(struct igbvf_adapter *adapter) 1484{ 1485 struct e1000_hw *hw = &adapter->hw; 1486 1487 /* hardware has been reset, we need to reload some things */ 1488 igbvf_configure(adapter); 1489 1490 clear_bit(__IGBVF_DOWN, &adapter->state); 1491 1492 napi_enable(&adapter->rx_ring->napi); 1493 if (adapter->msix_entries) 1494 igbvf_configure_msix(adapter); 1495 1496 /* Clear any pending interrupts. */ 1497 er32(EICR); 1498 igbvf_irq_enable(adapter); 1499 1500 /* start the watchdog */ 1501 hw->mac.get_link_status = 1; 1502 mod_timer(&adapter->watchdog_timer, jiffies + 1); 1503 1504 return 0; 1505} 1506 1507void igbvf_down(struct igbvf_adapter *adapter) 1508{ 1509 struct net_device *netdev = adapter->netdev; 1510 struct e1000_hw *hw = &adapter->hw; 1511 u32 rxdctl, txdctl; 1512 1513 /* signal that we're down so the interrupt handler does not 1514 * reschedule our watchdog timer 1515 */ 1516 set_bit(__IGBVF_DOWN, &adapter->state); 1517 1518 /* disable receives in the hardware */ 1519 rxdctl = er32(RXDCTL(0)); 1520 ew32(RXDCTL(0), rxdctl & ~E1000_RXDCTL_QUEUE_ENABLE); 1521 1522 netif_carrier_off(netdev); 1523 netif_stop_queue(netdev); 1524 1525 /* disable transmits in the hardware */ 1526 txdctl = er32(TXDCTL(0)); 1527 ew32(TXDCTL(0), txdctl & ~E1000_TXDCTL_QUEUE_ENABLE); 1528 1529 /* flush both disables and wait for them to finish */ 1530 e1e_flush(); 1531 msleep(10); 1532 1533 napi_disable(&adapter->rx_ring->napi); 1534 1535 igbvf_irq_disable(adapter); 1536 1537 del_timer_sync(&adapter->watchdog_timer); 1538 1539 /* record the stats before reset*/ 1540 igbvf_update_stats(adapter); 1541 1542 adapter->link_speed = 0; 1543 adapter->link_duplex = 0; 1544 1545 igbvf_reset(adapter); 1546 igbvf_clean_tx_ring(adapter->tx_ring); 1547 igbvf_clean_rx_ring(adapter->rx_ring); 1548} 1549 1550void igbvf_reinit_locked(struct igbvf_adapter *adapter) 1551{ 1552 might_sleep(); 1553 while (test_and_set_bit(__IGBVF_RESETTING, &adapter->state)) 1554 usleep_range(1000, 2000); 1555 igbvf_down(adapter); 1556 igbvf_up(adapter); 1557 clear_bit(__IGBVF_RESETTING, &adapter->state); 1558} 1559 1560/** 1561 * igbvf_sw_init - Initialize general software structures (struct igbvf_adapter) 1562 * @adapter: board private structure to initialize 1563 * 1564 * igbvf_sw_init initializes the Adapter private data structure. 1565 * Fields are initialized based on PCI device information and 1566 * OS network device settings (MTU size). 1567 **/ 1568static int igbvf_sw_init(struct igbvf_adapter *adapter) 1569{ 1570 struct net_device *netdev = adapter->netdev; 1571 s32 rc; 1572 1573 adapter->rx_buffer_len = ETH_FRAME_LEN + VLAN_HLEN + ETH_FCS_LEN; 1574 adapter->rx_ps_hdr_size = 0; 1575 adapter->max_frame_size = netdev->mtu + ETH_HLEN + ETH_FCS_LEN; 1576 adapter->min_frame_size = ETH_ZLEN + ETH_FCS_LEN; 1577 1578 adapter->tx_int_delay = 8; 1579 adapter->tx_abs_int_delay = 32; 1580 adapter->rx_int_delay = 0; 1581 adapter->rx_abs_int_delay = 8; 1582 adapter->requested_itr = 3; 1583 adapter->current_itr = IGBVF_START_ITR; 1584 1585 /* Set various function pointers */ 1586 adapter->ei->init_ops(&adapter->hw); 1587 1588 rc = adapter->hw.mac.ops.init_params(&adapter->hw); 1589 if (rc) 1590 return rc; 1591 1592 rc = adapter->hw.mbx.ops.init_params(&adapter->hw); 1593 if (rc) 1594 return rc; 1595 1596 igbvf_set_interrupt_capability(adapter); 1597 1598 if (igbvf_alloc_queues(adapter)) 1599 return -ENOMEM; 1600 1601 spin_lock_init(&adapter->tx_queue_lock); 1602 1603 /* Explicitly disable IRQ since the NIC can be in any state. */ 1604 igbvf_irq_disable(adapter); 1605 1606 spin_lock_init(&adapter->stats_lock); 1607 1608 set_bit(__IGBVF_DOWN, &adapter->state); 1609 return 0; 1610} 1611 1612static void igbvf_initialize_last_counter_stats(struct igbvf_adapter *adapter) 1613{ 1614 struct e1000_hw *hw = &adapter->hw; 1615 1616 adapter->stats.last_gprc = er32(VFGPRC); 1617 adapter->stats.last_gorc = er32(VFGORC); 1618 adapter->stats.last_gptc = er32(VFGPTC); 1619 adapter->stats.last_gotc = er32(VFGOTC); 1620 adapter->stats.last_mprc = er32(VFMPRC); 1621 adapter->stats.last_gotlbc = er32(VFGOTLBC); 1622 adapter->stats.last_gptlbc = er32(VFGPTLBC); 1623 adapter->stats.last_gorlbc = er32(VFGORLBC); 1624 adapter->stats.last_gprlbc = er32(VFGPRLBC); 1625 1626 adapter->stats.base_gprc = er32(VFGPRC); 1627 adapter->stats.base_gorc = er32(VFGORC); 1628 adapter->stats.base_gptc = er32(VFGPTC); 1629 adapter->stats.base_gotc = er32(VFGOTC); 1630 adapter->stats.base_mprc = er32(VFMPRC); 1631 adapter->stats.base_gotlbc = er32(VFGOTLBC); 1632 adapter->stats.base_gptlbc = er32(VFGPTLBC); 1633 adapter->stats.base_gorlbc = er32(VFGORLBC); 1634 adapter->stats.base_gprlbc = er32(VFGPRLBC); 1635} 1636 1637/** 1638 * igbvf_open - Called when a network interface is made active 1639 * @netdev: network interface device structure 1640 * 1641 * Returns 0 on success, negative value on failure 1642 * 1643 * The open entry point is called when a network interface is made 1644 * active by the system (IFF_UP). At this point all resources needed 1645 * for transmit and receive operations are allocated, the interrupt 1646 * handler is registered with the OS, the watchdog timer is started, 1647 * and the stack is notified that the interface is ready. 1648 **/ 1649static int igbvf_open(struct net_device *netdev) 1650{ 1651 struct igbvf_adapter *adapter = netdev_priv(netdev); 1652 struct e1000_hw *hw = &adapter->hw; 1653 int err; 1654 1655 /* disallow open during test */ 1656 if (test_bit(__IGBVF_TESTING, &adapter->state)) 1657 return -EBUSY; 1658 1659 /* allocate transmit descriptors */ 1660 err = igbvf_setup_tx_resources(adapter, adapter->tx_ring); 1661 if (err) 1662 goto err_setup_tx; 1663 1664 /* allocate receive descriptors */ 1665 err = igbvf_setup_rx_resources(adapter, adapter->rx_ring); 1666 if (err) 1667 goto err_setup_rx; 1668 1669 /* before we allocate an interrupt, we must be ready to handle it. 1670 * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt 1671 * as soon as we call pci_request_irq, so we have to setup our 1672 * clean_rx handler before we do so. 1673 */ 1674 igbvf_configure(adapter); 1675 1676 err = igbvf_request_irq(adapter); 1677 if (err) 1678 goto err_req_irq; 1679 1680 /* From here on the code is the same as igbvf_up() */ 1681 clear_bit(__IGBVF_DOWN, &adapter->state); 1682 1683 napi_enable(&adapter->rx_ring->napi); 1684 1685 /* clear any pending interrupts */ 1686 er32(EICR); 1687 1688 igbvf_irq_enable(adapter); 1689 1690 /* start the watchdog */ 1691 hw->mac.get_link_status = 1; 1692 mod_timer(&adapter->watchdog_timer, jiffies + 1); 1693 1694 return 0; 1695 1696err_req_irq: 1697 igbvf_free_rx_resources(adapter->rx_ring); 1698err_setup_rx: 1699 igbvf_free_tx_resources(adapter->tx_ring); 1700err_setup_tx: 1701 igbvf_reset(adapter); 1702 1703 return err; 1704} 1705 1706/** 1707 * igbvf_close - Disables a network interface 1708 * @netdev: network interface device structure 1709 * 1710 * Returns 0, this is not allowed to fail 1711 * 1712 * The close entry point is called when an interface is de-activated 1713 * by the OS. The hardware is still under the drivers control, but 1714 * needs to be disabled. A global MAC reset is issued to stop the 1715 * hardware, and all transmit and receive resources are freed. 1716 **/ 1717static int igbvf_close(struct net_device *netdev) 1718{ 1719 struct igbvf_adapter *adapter = netdev_priv(netdev); 1720 1721 WARN_ON(test_bit(__IGBVF_RESETTING, &adapter->state)); 1722 igbvf_down(adapter); 1723 1724 igbvf_free_irq(adapter); 1725 1726 igbvf_free_tx_resources(adapter->tx_ring); 1727 igbvf_free_rx_resources(adapter->rx_ring); 1728 1729 return 0; 1730} 1731 1732/** 1733 * igbvf_set_mac - Change the Ethernet Address of the NIC 1734 * @netdev: network interface device structure 1735 * @p: pointer to an address structure 1736 * 1737 * Returns 0 on success, negative on failure 1738 **/ 1739static int igbvf_set_mac(struct net_device *netdev, void *p) 1740{ 1741 struct igbvf_adapter *adapter = netdev_priv(netdev); 1742 struct e1000_hw *hw = &adapter->hw; 1743 struct sockaddr *addr = p; 1744 1745 if (!is_valid_ether_addr(addr->sa_data)) 1746 return -EADDRNOTAVAIL; 1747 1748 memcpy(hw->mac.addr, addr->sa_data, netdev->addr_len); 1749 1750 hw->mac.ops.rar_set(hw, hw->mac.addr, 0); 1751 1752 if (!ether_addr_equal(addr->sa_data, hw->mac.addr)) 1753 return -EADDRNOTAVAIL; 1754 1755 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len); 1756 1757 return 0; 1758} 1759 1760#define UPDATE_VF_COUNTER(reg, name) \ 1761{ \ 1762 u32 current_counter = er32(reg); \ 1763 if (current_counter < adapter->stats.last_##name) \ 1764 adapter->stats.name += 0x100000000LL; \ 1765 adapter->stats.last_##name = current_counter; \ 1766 adapter->stats.name &= 0xFFFFFFFF00000000LL; \ 1767 adapter->stats.name |= current_counter; \ 1768} 1769 1770/** 1771 * igbvf_update_stats - Update the board statistics counters 1772 * @adapter: board private structure 1773**/ 1774void igbvf_update_stats(struct igbvf_adapter *adapter) 1775{ 1776 struct e1000_hw *hw = &adapter->hw; 1777 struct pci_dev *pdev = adapter->pdev; 1778 1779 /* Prevent stats update while adapter is being reset, link is down 1780 * or if the pci connection is down. 1781 */ 1782 if (adapter->link_speed == 0) 1783 return; 1784 1785 if (test_bit(__IGBVF_RESETTING, &adapter->state)) 1786 return; 1787 1788 if (pci_channel_offline(pdev)) 1789 return; 1790 1791 UPDATE_VF_COUNTER(VFGPRC, gprc); 1792 UPDATE_VF_COUNTER(VFGORC, gorc); 1793 UPDATE_VF_COUNTER(VFGPTC, gptc); 1794 UPDATE_VF_COUNTER(VFGOTC, gotc); 1795 UPDATE_VF_COUNTER(VFMPRC, mprc); 1796 UPDATE_VF_COUNTER(VFGOTLBC, gotlbc); 1797 UPDATE_VF_COUNTER(VFGPTLBC, gptlbc); 1798 UPDATE_VF_COUNTER(VFGORLBC, gorlbc); 1799 UPDATE_VF_COUNTER(VFGPRLBC, gprlbc); 1800 1801 /* Fill out the OS statistics structure */ 1802 adapter->net_stats.multicast = adapter->stats.mprc; 1803} 1804 1805static void igbvf_print_link_info(struct igbvf_adapter *adapter) 1806{ 1807 dev_info(&adapter->pdev->dev, "Link is Up %d Mbps %s Duplex\n", 1808 adapter->link_speed, 1809 adapter->link_duplex == FULL_DUPLEX ? "Full" : "Half"); 1810} 1811 1812static bool igbvf_has_link(struct igbvf_adapter *adapter) 1813{ 1814 struct e1000_hw *hw = &adapter->hw; 1815 s32 ret_val = E1000_SUCCESS; 1816 bool link_active; 1817 1818 /* If interface is down, stay link down */ 1819 if (test_bit(__IGBVF_DOWN, &adapter->state)) 1820 return false; 1821 1822 ret_val = hw->mac.ops.check_for_link(hw); 1823 link_active = !hw->mac.get_link_status; 1824 1825 /* if check for link returns error we will need to reset */ 1826 if (ret_val && time_after(jiffies, adapter->last_reset + (10 * HZ))) 1827 schedule_work(&adapter->reset_task); 1828 1829 return link_active; 1830} 1831 1832/** 1833 * igbvf_watchdog - Timer Call-back 1834 * @data: pointer to adapter cast into an unsigned long 1835 **/ 1836static void igbvf_watchdog(unsigned long data) 1837{ 1838 struct igbvf_adapter *adapter = (struct igbvf_adapter *)data; 1839 1840 /* Do the rest outside of interrupt context */ 1841 schedule_work(&adapter->watchdog_task); 1842} 1843 1844static void igbvf_watchdog_task(struct work_struct *work) 1845{ 1846 struct igbvf_adapter *adapter = container_of(work, 1847 struct igbvf_adapter, 1848 watchdog_task); 1849 struct net_device *netdev = adapter->netdev; 1850 struct e1000_mac_info *mac = &adapter->hw.mac; 1851 struct igbvf_ring *tx_ring = adapter->tx_ring; 1852 struct e1000_hw *hw = &adapter->hw; 1853 u32 link; 1854 int tx_pending = 0; 1855 1856 link = igbvf_has_link(adapter); 1857 1858 if (link) { 1859 if (!netif_carrier_ok(netdev)) { 1860 mac->ops.get_link_up_info(&adapter->hw, 1861 &adapter->link_speed, 1862 &adapter->link_duplex); 1863 igbvf_print_link_info(adapter); 1864 1865 netif_carrier_on(netdev); 1866 netif_wake_queue(netdev); 1867 } 1868 } else { 1869 if (netif_carrier_ok(netdev)) { 1870 adapter->link_speed = 0; 1871 adapter->link_duplex = 0; 1872 dev_info(&adapter->pdev->dev, "Link is Down\n"); 1873 netif_carrier_off(netdev); 1874 netif_stop_queue(netdev); 1875 } 1876 } 1877 1878 if (netif_carrier_ok(netdev)) { 1879 igbvf_update_stats(adapter); 1880 } else { 1881 tx_pending = (igbvf_desc_unused(tx_ring) + 1 < 1882 tx_ring->count); 1883 if (tx_pending) { 1884 /* We've lost link, so the controller stops DMA, 1885 * but we've got queued Tx work that's never going 1886 * to get done, so reset controller to flush Tx. 1887 * (Do the reset outside of interrupt context). 1888 */ 1889 adapter->tx_timeout_count++; 1890 schedule_work(&adapter->reset_task); 1891 } 1892 } 1893 1894 /* Cause software interrupt to ensure Rx ring is cleaned */ 1895 ew32(EICS, adapter->rx_ring->eims_value); 1896 1897 /* Reset the timer */ 1898 if (!test_bit(__IGBVF_DOWN, &adapter->state)) 1899 mod_timer(&adapter->watchdog_timer, 1900 round_jiffies(jiffies + (2 * HZ))); 1901} 1902 1903#define IGBVF_TX_FLAGS_CSUM 0x00000001 1904#define IGBVF_TX_FLAGS_VLAN 0x00000002 1905#define IGBVF_TX_FLAGS_TSO 0x00000004 1906#define IGBVF_TX_FLAGS_IPV4 0x00000008 1907#define IGBVF_TX_FLAGS_VLAN_MASK 0xffff0000 1908#define IGBVF_TX_FLAGS_VLAN_SHIFT 16 1909 1910static int igbvf_tso(struct igbvf_adapter *adapter, 1911 struct igbvf_ring *tx_ring, 1912 struct sk_buff *skb, u32 tx_flags, u8 *hdr_len, 1913 __be16 protocol) 1914{ 1915 struct e1000_adv_tx_context_desc *context_desc; 1916 struct igbvf_buffer *buffer_info; 1917 u32 info = 0, tu_cmd = 0; 1918 u32 mss_l4len_idx, l4len; 1919 unsigned int i; 1920 int err; 1921 1922 *hdr_len = 0; 1923 1924 err = skb_cow_head(skb, 0); 1925 if (err < 0) { 1926 dev_err(&adapter->pdev->dev, "igbvf_tso returning an error\n"); 1927 return err; 1928 } 1929 1930 l4len = tcp_hdrlen(skb); 1931 *hdr_len += l4len; 1932 1933 if (protocol == htons(ETH_P_IP)) { 1934 struct iphdr *iph = ip_hdr(skb); 1935 1936 iph->tot_len = 0; 1937 iph->check = 0; 1938 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr, 1939 iph->daddr, 0, 1940 IPPROTO_TCP, 1941 0); 1942 } else if (skb_is_gso_v6(skb)) { 1943 ipv6_hdr(skb)->payload_len = 0; 1944 tcp_hdr(skb)->check = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr, 1945 &ipv6_hdr(skb)->daddr, 1946 0, IPPROTO_TCP, 0); 1947 } 1948 1949 i = tx_ring->next_to_use; 1950 1951 buffer_info = &tx_ring->buffer_info[i]; 1952 context_desc = IGBVF_TX_CTXTDESC_ADV(*tx_ring, i); 1953 /* VLAN MACLEN IPLEN */ 1954 if (tx_flags & IGBVF_TX_FLAGS_VLAN) 1955 info |= (tx_flags & IGBVF_TX_FLAGS_VLAN_MASK); 1956 info |= (skb_network_offset(skb) << E1000_ADVTXD_MACLEN_SHIFT); 1957 *hdr_len += skb_network_offset(skb); 1958 info |= (skb_transport_header(skb) - skb_network_header(skb)); 1959 *hdr_len += (skb_transport_header(skb) - skb_network_header(skb)); 1960 context_desc->vlan_macip_lens = cpu_to_le32(info); 1961 1962 /* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */ 1963 tu_cmd |= (E1000_TXD_CMD_DEXT | E1000_ADVTXD_DTYP_CTXT); 1964 1965 if (protocol == htons(ETH_P_IP)) 1966 tu_cmd |= E1000_ADVTXD_TUCMD_IPV4; 1967 tu_cmd |= E1000_ADVTXD_TUCMD_L4T_TCP; 1968 1969 context_desc->type_tucmd_mlhl = cpu_to_le32(tu_cmd); 1970 1971 /* MSS L4LEN IDX */ 1972 mss_l4len_idx = (skb_shinfo(skb)->gso_size << E1000_ADVTXD_MSS_SHIFT); 1973 mss_l4len_idx |= (l4len << E1000_ADVTXD_L4LEN_SHIFT); 1974 1975 context_desc->mss_l4len_idx = cpu_to_le32(mss_l4len_idx); 1976 context_desc->seqnum_seed = 0; 1977 1978 buffer_info->time_stamp = jiffies; 1979 buffer_info->dma = 0; 1980 i++; 1981 if (i == tx_ring->count) 1982 i = 0; 1983 1984 tx_ring->next_to_use = i; 1985 1986 return true; 1987} 1988 1989static inline bool igbvf_tx_csum(struct igbvf_adapter *adapter, 1990 struct igbvf_ring *tx_ring, 1991 struct sk_buff *skb, u32 tx_flags, 1992 __be16 protocol) 1993{ 1994 struct e1000_adv_tx_context_desc *context_desc; 1995 unsigned int i; 1996 struct igbvf_buffer *buffer_info; 1997 u32 info = 0, tu_cmd = 0; 1998 1999 if ((skb->ip_summed == CHECKSUM_PARTIAL) || 2000 (tx_flags & IGBVF_TX_FLAGS_VLAN)) { 2001 i = tx_ring->next_to_use; 2002 buffer_info = &tx_ring->buffer_info[i]; 2003 context_desc = IGBVF_TX_CTXTDESC_ADV(*tx_ring, i); 2004 2005 if (tx_flags & IGBVF_TX_FLAGS_VLAN) 2006 info |= (tx_flags & IGBVF_TX_FLAGS_VLAN_MASK); 2007 2008 info |= (skb_network_offset(skb) << E1000_ADVTXD_MACLEN_SHIFT); 2009 if (skb->ip_summed == CHECKSUM_PARTIAL) 2010 info |= (skb_transport_header(skb) - 2011 skb_network_header(skb)); 2012 2013 context_desc->vlan_macip_lens = cpu_to_le32(info); 2014 2015 tu_cmd |= (E1000_TXD_CMD_DEXT | E1000_ADVTXD_DTYP_CTXT); 2016 2017 if (skb->ip_summed == CHECKSUM_PARTIAL) { 2018 switch (protocol) { 2019 case htons(ETH_P_IP): 2020 tu_cmd |= E1000_ADVTXD_TUCMD_IPV4; 2021 if (ip_hdr(skb)->protocol == IPPROTO_TCP) 2022 tu_cmd |= E1000_ADVTXD_TUCMD_L4T_TCP; 2023 break; 2024 case htons(ETH_P_IPV6): 2025 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP) 2026 tu_cmd |= E1000_ADVTXD_TUCMD_L4T_TCP; 2027 break; 2028 default: 2029 break; 2030 } 2031 } 2032 2033 context_desc->type_tucmd_mlhl = cpu_to_le32(tu_cmd); 2034 context_desc->seqnum_seed = 0; 2035 context_desc->mss_l4len_idx = 0; 2036 2037 buffer_info->time_stamp = jiffies; 2038 buffer_info->dma = 0; 2039 i++; 2040 if (i == tx_ring->count) 2041 i = 0; 2042 tx_ring->next_to_use = i; 2043 2044 return true; 2045 } 2046 2047 return false; 2048} 2049 2050static int igbvf_maybe_stop_tx(struct net_device *netdev, int size) 2051{ 2052 struct igbvf_adapter *adapter = netdev_priv(netdev); 2053 2054 /* there is enough descriptors then we don't need to worry */ 2055 if (igbvf_desc_unused(adapter->tx_ring) >= size) 2056 return 0; 2057 2058 netif_stop_queue(netdev); 2059 2060 /* Herbert's original patch had: 2061 * smp_mb__after_netif_stop_queue(); 2062 * but since that doesn't exist yet, just open code it. 2063 */ 2064 smp_mb(); 2065 2066 /* We need to check again just in case room has been made available */ 2067 if (igbvf_desc_unused(adapter->tx_ring) < size) 2068 return -EBUSY; 2069 2070 netif_wake_queue(netdev); 2071 2072 ++adapter->restart_queue; 2073 return 0; 2074} 2075 2076#define IGBVF_MAX_TXD_PWR 16 2077#define IGBVF_MAX_DATA_PER_TXD (1 << IGBVF_MAX_TXD_PWR) 2078 2079static inline int igbvf_tx_map_adv(struct igbvf_adapter *adapter, 2080 struct igbvf_ring *tx_ring, 2081 struct sk_buff *skb) 2082{ 2083 struct igbvf_buffer *buffer_info; 2084 struct pci_dev *pdev = adapter->pdev; 2085 unsigned int len = skb_headlen(skb); 2086 unsigned int count = 0, i; 2087 unsigned int f; 2088 2089 i = tx_ring->next_to_use; 2090 2091 buffer_info = &tx_ring->buffer_info[i]; 2092 BUG_ON(len >= IGBVF_MAX_DATA_PER_TXD); 2093 buffer_info->length = len; 2094 /* set time_stamp *before* dma to help avoid a possible race */ 2095 buffer_info->time_stamp = jiffies; 2096 buffer_info->mapped_as_page = false; 2097 buffer_info->dma = dma_map_single(&pdev->dev, skb->data, len, 2098 DMA_TO_DEVICE); 2099 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) 2100 goto dma_error; 2101 2102 for (f = 0; f < skb_shinfo(skb)->nr_frags; f++) { 2103 const struct skb_frag_struct *frag; 2104 2105 count++; 2106 i++; 2107 if (i == tx_ring->count) 2108 i = 0; 2109 2110 frag = &skb_shinfo(skb)->frags[f]; 2111 len = skb_frag_size(frag); 2112 2113 buffer_info = &tx_ring->buffer_info[i]; 2114 BUG_ON(len >= IGBVF_MAX_DATA_PER_TXD); 2115 buffer_info->length = len; 2116 buffer_info->time_stamp = jiffies; 2117 buffer_info->mapped_as_page = true; 2118 buffer_info->dma = skb_frag_dma_map(&pdev->dev, frag, 0, len, 2119 DMA_TO_DEVICE); 2120 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) 2121 goto dma_error; 2122 } 2123 2124 tx_ring->buffer_info[i].skb = skb; 2125 2126 return ++count; 2127 2128dma_error: 2129 dev_err(&pdev->dev, "TX DMA map failed\n"); 2130 2131 /* clear timestamp and dma mappings for failed buffer_info mapping */ 2132 buffer_info->dma = 0; 2133 buffer_info->time_stamp = 0; 2134 buffer_info->length = 0; 2135 buffer_info->mapped_as_page = false; 2136 if (count) 2137 count--; 2138 2139 /* clear timestamp and dma mappings for remaining portion of packet */ 2140 while (count--) { 2141 if (i == 0) 2142 i += tx_ring->count; 2143 i--; 2144 buffer_info = &tx_ring->buffer_info[i]; 2145 igbvf_put_txbuf(adapter, buffer_info); 2146 } 2147 2148 return 0; 2149} 2150 2151static inline void igbvf_tx_queue_adv(struct igbvf_adapter *adapter, 2152 struct igbvf_ring *tx_ring, 2153 int tx_flags, int count, 2154 unsigned int first, u32 paylen, 2155 u8 hdr_len) 2156{ 2157 union e1000_adv_tx_desc *tx_desc = NULL; 2158 struct igbvf_buffer *buffer_info; 2159 u32 olinfo_status = 0, cmd_type_len; 2160 unsigned int i; 2161 2162 cmd_type_len = (E1000_ADVTXD_DTYP_DATA | E1000_ADVTXD_DCMD_IFCS | 2163 E1000_ADVTXD_DCMD_DEXT); 2164 2165 if (tx_flags & IGBVF_TX_FLAGS_VLAN) 2166 cmd_type_len |= E1000_ADVTXD_DCMD_VLE; 2167 2168 if (tx_flags & IGBVF_TX_FLAGS_TSO) { 2169 cmd_type_len |= E1000_ADVTXD_DCMD_TSE; 2170 2171 /* insert tcp checksum */ 2172 olinfo_status |= E1000_TXD_POPTS_TXSM << 8; 2173 2174 /* insert ip checksum */ 2175 if (tx_flags & IGBVF_TX_FLAGS_IPV4) 2176 olinfo_status |= E1000_TXD_POPTS_IXSM << 8; 2177 2178 } else if (tx_flags & IGBVF_TX_FLAGS_CSUM) { 2179 olinfo_status |= E1000_TXD_POPTS_TXSM << 8; 2180 } 2181 2182 olinfo_status |= ((paylen - hdr_len) << E1000_ADVTXD_PAYLEN_SHIFT); 2183 2184 i = tx_ring->next_to_use; 2185 while (count--) { 2186 buffer_info = &tx_ring->buffer_info[i]; 2187 tx_desc = IGBVF_TX_DESC_ADV(*tx_ring, i); 2188 tx_desc->read.buffer_addr = cpu_to_le64(buffer_info->dma); 2189 tx_desc->read.cmd_type_len = 2190 cpu_to_le32(cmd_type_len | buffer_info->length); 2191 tx_desc->read.olinfo_status = cpu_to_le32(olinfo_status); 2192 i++; 2193 if (i == tx_ring->count) 2194 i = 0; 2195 } 2196 2197 tx_desc->read.cmd_type_len |= cpu_to_le32(adapter->txd_cmd); 2198 /* Force memory writes to complete before letting h/w 2199 * know there are new descriptors to fetch. (Only 2200 * applicable for weak-ordered memory model archs, 2201 * such as IA-64). 2202 */ 2203 wmb(); 2204 2205 tx_ring->buffer_info[first].next_to_watch = tx_desc; 2206 tx_ring->next_to_use = i; 2207 writel(i, adapter->hw.hw_addr + tx_ring->tail); 2208 /* we need this if more than one processor can write to our tail 2209 * at a time, it synchronizes IO on IA64/Altix systems 2210 */ 2211 mmiowb(); 2212} 2213 2214static netdev_tx_t igbvf_xmit_frame_ring_adv(struct sk_buff *skb, 2215 struct net_device *netdev, 2216 struct igbvf_ring *tx_ring) 2217{ 2218 struct igbvf_adapter *adapter = netdev_priv(netdev); 2219 unsigned int first, tx_flags = 0; 2220 u8 hdr_len = 0; 2221 int count = 0; 2222 int tso = 0; 2223 __be16 protocol = vlan_get_protocol(skb); 2224 2225 if (test_bit(__IGBVF_DOWN, &adapter->state)) { 2226 dev_kfree_skb_any(skb); 2227 return NETDEV_TX_OK; 2228 } 2229 2230 if (skb->len <= 0) { 2231 dev_kfree_skb_any(skb); 2232 return NETDEV_TX_OK; 2233 } 2234 2235 /* need: count + 4 desc gap to keep tail from touching 2236 * + 2 desc gap to keep tail from touching head, 2237 * + 1 desc for skb->data, 2238 * + 1 desc for context descriptor, 2239 * head, otherwise try next time 2240 */ 2241 if (igbvf_maybe_stop_tx(netdev, skb_shinfo(skb)->nr_frags + 4)) { 2242 /* this is a hard error */ 2243 return NETDEV_TX_BUSY; 2244 } 2245 2246 if (skb_vlan_tag_present(skb)) { 2247 tx_flags |= IGBVF_TX_FLAGS_VLAN; 2248 tx_flags |= (skb_vlan_tag_get(skb) << 2249 IGBVF_TX_FLAGS_VLAN_SHIFT); 2250 } 2251 2252 if (protocol == htons(ETH_P_IP)) 2253 tx_flags |= IGBVF_TX_FLAGS_IPV4; 2254 2255 first = tx_ring->next_to_use; 2256 2257 tso = skb_is_gso(skb) ? 2258 igbvf_tso(adapter, tx_ring, skb, tx_flags, &hdr_len, protocol) : 0; 2259 if (unlikely(tso < 0)) { 2260 dev_kfree_skb_any(skb); 2261 return NETDEV_TX_OK; 2262 } 2263 2264 if (tso) 2265 tx_flags |= IGBVF_TX_FLAGS_TSO; 2266 else if (igbvf_tx_csum(adapter, tx_ring, skb, tx_flags, protocol) && 2267 (skb->ip_summed == CHECKSUM_PARTIAL)) 2268 tx_flags |= IGBVF_TX_FLAGS_CSUM; 2269 2270 /* count reflects descriptors mapped, if 0 then mapping error 2271 * has occurred and we need to rewind the descriptor queue 2272 */ 2273 count = igbvf_tx_map_adv(adapter, tx_ring, skb); 2274 2275 if (count) { 2276 igbvf_tx_queue_adv(adapter, tx_ring, tx_flags, count, 2277 first, skb->len, hdr_len); 2278 /* Make sure there is space in the ring for the next send. */ 2279 igbvf_maybe_stop_tx(netdev, MAX_SKB_FRAGS + 4); 2280 } else { 2281 dev_kfree_skb_any(skb); 2282 tx_ring->buffer_info[first].time_stamp = 0; 2283 tx_ring->next_to_use = first; 2284 } 2285 2286 return NETDEV_TX_OK; 2287} 2288 2289static netdev_tx_t igbvf_xmit_frame(struct sk_buff *skb, 2290 struct net_device *netdev) 2291{ 2292 struct igbvf_adapter *adapter = netdev_priv(netdev); 2293 struct igbvf_ring *tx_ring; 2294 2295 if (test_bit(__IGBVF_DOWN, &adapter->state)) { 2296 dev_kfree_skb_any(skb); 2297 return NETDEV_TX_OK; 2298 } 2299 2300 tx_ring = &adapter->tx_ring[0]; 2301 2302 return igbvf_xmit_frame_ring_adv(skb, netdev, tx_ring); 2303} 2304 2305/** 2306 * igbvf_tx_timeout - Respond to a Tx Hang 2307 * @netdev: network interface device structure 2308 **/ 2309static void igbvf_tx_timeout(struct net_device *netdev) 2310{ 2311 struct igbvf_adapter *adapter = netdev_priv(netdev); 2312 2313 /* Do the reset outside of interrupt context */ 2314 adapter->tx_timeout_count++; 2315 schedule_work(&adapter->reset_task); 2316} 2317 2318static void igbvf_reset_task(struct work_struct *work) 2319{ 2320 struct igbvf_adapter *adapter; 2321 2322 adapter = container_of(work, struct igbvf_adapter, reset_task); 2323 2324 igbvf_reinit_locked(adapter); 2325} 2326 2327/** 2328 * igbvf_get_stats - Get System Network Statistics 2329 * @netdev: network interface device structure 2330 * 2331 * Returns the address of the device statistics structure. 2332 * The statistics are actually updated from the timer callback. 2333 **/ 2334static struct net_device_stats *igbvf_get_stats(struct net_device *netdev) 2335{ 2336 struct igbvf_adapter *adapter = netdev_priv(netdev); 2337 2338 /* only return the current stats */ 2339 return &adapter->net_stats; 2340} 2341 2342/** 2343 * igbvf_change_mtu - Change the Maximum Transfer Unit 2344 * @netdev: network interface device structure 2345 * @new_mtu: new value for maximum frame size 2346 * 2347 * Returns 0 on success, negative on failure 2348 **/ 2349static int igbvf_change_mtu(struct net_device *netdev, int new_mtu) 2350{ 2351 struct igbvf_adapter *adapter = netdev_priv(netdev); 2352 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN; 2353 2354 if (new_mtu < 68 || new_mtu > INT_MAX - ETH_HLEN - ETH_FCS_LEN || 2355 max_frame > MAX_JUMBO_FRAME_SIZE) 2356 return -EINVAL; 2357 2358#define MAX_STD_JUMBO_FRAME_SIZE 9234 2359 if (max_frame > MAX_STD_JUMBO_FRAME_SIZE) { 2360 dev_err(&adapter->pdev->dev, "MTU > 9216 not supported.\n"); 2361 return -EINVAL; 2362 } 2363 2364 while (test_and_set_bit(__IGBVF_RESETTING, &adapter->state)) 2365 usleep_range(1000, 2000); 2366 /* igbvf_down has a dependency on max_frame_size */ 2367 adapter->max_frame_size = max_frame; 2368 if (netif_running(netdev)) 2369 igbvf_down(adapter); 2370 2371 /* NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN 2372 * means we reserve 2 more, this pushes us to allocate from the next 2373 * larger slab size. 2374 * i.e. RXBUFFER_2048 --> size-4096 slab 2375 * However with the new *_jumbo_rx* routines, jumbo receives will use 2376 * fragmented skbs 2377 */ 2378 2379 if (max_frame <= 1024) 2380 adapter->rx_buffer_len = 1024; 2381 else if (max_frame <= 2048) 2382 adapter->rx_buffer_len = 2048; 2383 else 2384#if (PAGE_SIZE / 2) > 16384 2385 adapter->rx_buffer_len = 16384; 2386#else 2387 adapter->rx_buffer_len = PAGE_SIZE / 2; 2388#endif 2389 2390 /* adjust allocation if LPE protects us, and we aren't using SBP */ 2391 if ((max_frame == ETH_FRAME_LEN + ETH_FCS_LEN) || 2392 (max_frame == ETH_FRAME_LEN + VLAN_HLEN + ETH_FCS_LEN)) 2393 adapter->rx_buffer_len = ETH_FRAME_LEN + VLAN_HLEN + 2394 ETH_FCS_LEN; 2395 2396 dev_info(&adapter->pdev->dev, "changing MTU from %d to %d\n", 2397 netdev->mtu, new_mtu); 2398 netdev->mtu = new_mtu; 2399 2400 if (netif_running(netdev)) 2401 igbvf_up(adapter); 2402 else 2403 igbvf_reset(adapter); 2404 2405 clear_bit(__IGBVF_RESETTING, &adapter->state); 2406 2407 return 0; 2408} 2409 2410static int igbvf_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd) 2411{ 2412 switch (cmd) { 2413 default: 2414 return -EOPNOTSUPP; 2415 } 2416} 2417 2418static int igbvf_suspend(struct pci_dev *pdev, pm_message_t state) 2419{ 2420 struct net_device *netdev = pci_get_drvdata(pdev); 2421 struct igbvf_adapter *adapter = netdev_priv(netdev); 2422#ifdef CONFIG_PM 2423 int retval = 0; 2424#endif 2425 2426 netif_device_detach(netdev); 2427 2428 if (netif_running(netdev)) { 2429 WARN_ON(test_bit(__IGBVF_RESETTING, &adapter->state)); 2430 igbvf_down(adapter); 2431 igbvf_free_irq(adapter); 2432 } 2433 2434#ifdef CONFIG_PM 2435 retval = pci_save_state(pdev); 2436 if (retval) 2437 return retval; 2438#endif 2439 2440 pci_disable_device(pdev); 2441 2442 return 0; 2443} 2444 2445#ifdef CONFIG_PM 2446static int igbvf_resume(struct pci_dev *pdev) 2447{ 2448 struct net_device *netdev = pci_get_drvdata(pdev); 2449 struct igbvf_adapter *adapter = netdev_priv(netdev); 2450 u32 err; 2451 2452 pci_restore_state(pdev); 2453 err = pci_enable_device_mem(pdev); 2454 if (err) { 2455 dev_err(&pdev->dev, "Cannot enable PCI device from suspend\n"); 2456 return err; 2457 } 2458 2459 pci_set_master(pdev); 2460 2461 if (netif_running(netdev)) { 2462 err = igbvf_request_irq(adapter); 2463 if (err) 2464 return err; 2465 } 2466 2467 igbvf_reset(adapter); 2468 2469 if (netif_running(netdev)) 2470 igbvf_up(adapter); 2471 2472 netif_device_attach(netdev); 2473 2474 return 0; 2475} 2476#endif 2477 2478static void igbvf_shutdown(struct pci_dev *pdev) 2479{ 2480 igbvf_suspend(pdev, PMSG_SUSPEND); 2481} 2482 2483#ifdef CONFIG_NET_POLL_CONTROLLER 2484/* Polling 'interrupt' - used by things like netconsole to send skbs 2485 * without having to re-enable interrupts. It's not called while 2486 * the interrupt routine is executing. 2487 */ 2488static void igbvf_netpoll(struct net_device *netdev) 2489{ 2490 struct igbvf_adapter *adapter = netdev_priv(netdev); 2491 2492 disable_irq(adapter->pdev->irq); 2493 2494 igbvf_clean_tx_irq(adapter->tx_ring); 2495 2496 enable_irq(adapter->pdev->irq); 2497} 2498#endif 2499 2500/** 2501 * igbvf_io_error_detected - called when PCI error is detected 2502 * @pdev: Pointer to PCI device 2503 * @state: The current pci connection state 2504 * 2505 * This function is called after a PCI bus error affecting 2506 * this device has been detected. 2507 */ 2508static pci_ers_result_t igbvf_io_error_detected(struct pci_dev *pdev, 2509 pci_channel_state_t state) 2510{ 2511 struct net_device *netdev = pci_get_drvdata(pdev); 2512 struct igbvf_adapter *adapter = netdev_priv(netdev); 2513 2514 netif_device_detach(netdev); 2515 2516 if (state == pci_channel_io_perm_failure) 2517 return PCI_ERS_RESULT_DISCONNECT; 2518 2519 if (netif_running(netdev)) 2520 igbvf_down(adapter); 2521 pci_disable_device(pdev); 2522 2523 /* Request a slot slot reset. */ 2524 return PCI_ERS_RESULT_NEED_RESET; 2525} 2526 2527/** 2528 * igbvf_io_slot_reset - called after the pci bus has been reset. 2529 * @pdev: Pointer to PCI device 2530 * 2531 * Restart the card from scratch, as if from a cold-boot. Implementation 2532 * resembles the first-half of the igbvf_resume routine. 2533 */ 2534static pci_ers_result_t igbvf_io_slot_reset(struct pci_dev *pdev) 2535{ 2536 struct net_device *netdev = pci_get_drvdata(pdev); 2537 struct igbvf_adapter *adapter = netdev_priv(netdev); 2538 2539 if (pci_enable_device_mem(pdev)) { 2540 dev_err(&pdev->dev, 2541 "Cannot re-enable PCI device after reset.\n"); 2542 return PCI_ERS_RESULT_DISCONNECT; 2543 } 2544 pci_set_master(pdev); 2545 2546 igbvf_reset(adapter); 2547 2548 return PCI_ERS_RESULT_RECOVERED; 2549} 2550 2551/** 2552 * igbvf_io_resume - called when traffic can start flowing again. 2553 * @pdev: Pointer to PCI device 2554 * 2555 * This callback is called when the error recovery driver tells us that 2556 * its OK to resume normal operation. Implementation resembles the 2557 * second-half of the igbvf_resume routine. 2558 */ 2559static void igbvf_io_resume(struct pci_dev *pdev) 2560{ 2561 struct net_device *netdev = pci_get_drvdata(pdev); 2562 struct igbvf_adapter *adapter = netdev_priv(netdev); 2563 2564 if (netif_running(netdev)) { 2565 if (igbvf_up(adapter)) { 2566 dev_err(&pdev->dev, 2567 "can't bring device back up after reset\n"); 2568 return; 2569 } 2570 } 2571 2572 netif_device_attach(netdev); 2573} 2574 2575static void igbvf_print_device_info(struct igbvf_adapter *adapter) 2576{ 2577 struct e1000_hw *hw = &adapter->hw; 2578 struct net_device *netdev = adapter->netdev; 2579 struct pci_dev *pdev = adapter->pdev; 2580 2581 if (hw->mac.type == e1000_vfadapt_i350) 2582 dev_info(&pdev->dev, "Intel(R) I350 Virtual Function\n"); 2583 else 2584 dev_info(&pdev->dev, "Intel(R) 82576 Virtual Function\n"); 2585 dev_info(&pdev->dev, "Address: %pM\n", netdev->dev_addr); 2586} 2587 2588static int igbvf_set_features(struct net_device *netdev, 2589 netdev_features_t features) 2590{ 2591 struct igbvf_adapter *adapter = netdev_priv(netdev); 2592 2593 if (features & NETIF_F_RXCSUM) 2594 adapter->flags &= ~IGBVF_FLAG_RX_CSUM_DISABLED; 2595 else 2596 adapter->flags |= IGBVF_FLAG_RX_CSUM_DISABLED; 2597 2598 return 0; 2599} 2600 2601static const struct net_device_ops igbvf_netdev_ops = { 2602 .ndo_open = igbvf_open, 2603 .ndo_stop = igbvf_close, 2604 .ndo_start_xmit = igbvf_xmit_frame, 2605 .ndo_get_stats = igbvf_get_stats, 2606 .ndo_set_rx_mode = igbvf_set_multi, 2607 .ndo_set_mac_address = igbvf_set_mac, 2608 .ndo_change_mtu = igbvf_change_mtu, 2609 .ndo_do_ioctl = igbvf_ioctl, 2610 .ndo_tx_timeout = igbvf_tx_timeout, 2611 .ndo_vlan_rx_add_vid = igbvf_vlan_rx_add_vid, 2612 .ndo_vlan_rx_kill_vid = igbvf_vlan_rx_kill_vid, 2613#ifdef CONFIG_NET_POLL_CONTROLLER 2614 .ndo_poll_controller = igbvf_netpoll, 2615#endif 2616 .ndo_set_features = igbvf_set_features, 2617}; 2618 2619/** 2620 * igbvf_probe - Device Initialization Routine 2621 * @pdev: PCI device information struct 2622 * @ent: entry in igbvf_pci_tbl 2623 * 2624 * Returns 0 on success, negative on failure 2625 * 2626 * igbvf_probe initializes an adapter identified by a pci_dev structure. 2627 * The OS initialization, configuring of the adapter private structure, 2628 * and a hardware reset occur. 2629 **/ 2630static int igbvf_probe(struct pci_dev *pdev, const struct pci_device_id *ent) 2631{ 2632 struct net_device *netdev; 2633 struct igbvf_adapter *adapter; 2634 struct e1000_hw *hw; 2635 const struct igbvf_info *ei = igbvf_info_tbl[ent->driver_data]; 2636 2637 static int cards_found; 2638 int err, pci_using_dac; 2639 2640 err = pci_enable_device_mem(pdev); 2641 if (err) 2642 return err; 2643 2644 pci_using_dac = 0; 2645 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64)); 2646 if (!err) { 2647 pci_using_dac = 1; 2648 } else { 2649 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)); 2650 if (err) { 2651 dev_err(&pdev->dev, 2652 "No usable DMA configuration, aborting\n"); 2653 goto err_dma; 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_get_variants; 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_CTAG_TX | 2726 NETIF_F_HW_VLAN_CTAG_RX | 2727 NETIF_F_HW_VLAN_CTAG_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, 2749 "MAC address not assigned by administrator.\n"); 2750 memcpy(netdev->dev_addr, adapter->hw.mac.addr, 2751 netdev->addr_len); 2752 } 2753 2754 if (!is_valid_ether_addr(netdev->dev_addr)) { 2755 dev_info(&pdev->dev, "Assigning random MAC address.\n"); 2756 eth_hw_addr_random(netdev); 2757 memcpy(adapter->hw.mac.addr, netdev->dev_addr, 2758 netdev->addr_len); 2759 } 2760 2761 setup_timer(&adapter->watchdog_timer, &igbvf_watchdog, 2762 (unsigned long)adapter); 2763 2764 INIT_WORK(&adapter->reset_task, igbvf_reset_task); 2765 INIT_WORK(&adapter->watchdog_task, igbvf_watchdog_task); 2766 2767 /* ring size defaults */ 2768 adapter->rx_ring->count = 1024; 2769 adapter->tx_ring->count = 1024; 2770 2771 /* reset the hardware with the new settings */ 2772 igbvf_reset(adapter); 2773 2774 /* set hardware-specific flags */ 2775 if (adapter->hw.mac.type == e1000_vfadapt_i350) 2776 adapter->flags |= IGBVF_FLAG_RX_LB_VLAN_BSWAP; 2777 2778 strcpy(netdev->name, "eth%d"); 2779 err = register_netdev(netdev); 2780 if (err) 2781 goto err_hw_init; 2782 2783 /* tell the stack to leave us alone until igbvf_open() is called */ 2784 netif_carrier_off(netdev); 2785 netif_stop_queue(netdev); 2786 2787 igbvf_print_device_info(adapter); 2788 2789 igbvf_initialize_last_counter_stats(adapter); 2790 2791 return 0; 2792 2793err_hw_init: 2794 kfree(adapter->tx_ring); 2795 kfree(adapter->rx_ring); 2796err_sw_init: 2797 igbvf_reset_interrupt_capability(adapter); 2798err_get_variants: 2799 iounmap(adapter->hw.hw_addr); 2800err_ioremap: 2801 free_netdev(netdev); 2802err_alloc_etherdev: 2803 pci_release_regions(pdev); 2804err_pci_reg: 2805err_dma: 2806 pci_disable_device(pdev); 2807 return err; 2808} 2809 2810/** 2811 * igbvf_remove - Device Removal Routine 2812 * @pdev: PCI device information struct 2813 * 2814 * igbvf_remove is called by the PCI subsystem to alert the driver 2815 * that it should release a PCI device. The could be caused by a 2816 * Hot-Plug event, or because the driver is going to be removed from 2817 * memory. 2818 **/ 2819static void igbvf_remove(struct pci_dev *pdev) 2820{ 2821 struct net_device *netdev = pci_get_drvdata(pdev); 2822 struct igbvf_adapter *adapter = netdev_priv(netdev); 2823 struct e1000_hw *hw = &adapter->hw; 2824 2825 /* The watchdog timer may be rescheduled, so explicitly 2826 * disable it from being rescheduled. 2827 */ 2828 set_bit(__IGBVF_DOWN, &adapter->state); 2829 del_timer_sync(&adapter->watchdog_timer); 2830 2831 cancel_work_sync(&adapter->reset_task); 2832 cancel_work_sync(&adapter->watchdog_task); 2833 2834 unregister_netdev(netdev); 2835 2836 igbvf_reset_interrupt_capability(adapter); 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) */ 2856static 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 2862static const struct pci_device_id 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}; 2867MODULE_DEVICE_TABLE(pci, igbvf_pci_tbl); 2868 2869/* PCI Device API Driver */ 2870static 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 **/ 2890static int __init igbvf_init_module(void) 2891{ 2892 int ret; 2893 2894 pr_info("%s - version %s\n", igbvf_driver_string, igbvf_driver_version); 2895 pr_info("%s\n", igbvf_copyright); 2896 2897 ret = pci_register_driver(&igbvf_driver); 2898 2899 return ret; 2900} 2901module_init(igbvf_init_module); 2902 2903/** 2904 * igbvf_exit_module - Driver Exit Cleanup Routine 2905 * 2906 * igbvf_exit_module is called just before the driver is removed 2907 * from memory. 2908 **/ 2909static void __exit igbvf_exit_module(void) 2910{ 2911 pci_unregister_driver(&igbvf_driver); 2912} 2913module_exit(igbvf_exit_module); 2914 2915MODULE_AUTHOR("Intel Corporation, <e1000-devel@lists.sourceforge.net>"); 2916MODULE_DESCRIPTION("Intel(R) Gigabit Virtual Function Network Driver"); 2917MODULE_LICENSE("GPL"); 2918MODULE_VERSION(DRV_VERSION); 2919 2920/* netdev.c */ 2921