igb_main.c revision ea5ceeabf5621ed36d24e6741b45cfd1e1fce11b
1/******************************************************************************* 2 3 Intel(R) Gigabit Ethernet Linux driver 4 Copyright(c) 2007-2012 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/bitops.h> 34#include <linux/vmalloc.h> 35#include <linux/pagemap.h> 36#include <linux/netdevice.h> 37#include <linux/ipv6.h> 38#include <linux/slab.h> 39#include <net/checksum.h> 40#include <net/ip6_checksum.h> 41#include <linux/net_tstamp.h> 42#include <linux/mii.h> 43#include <linux/ethtool.h> 44#include <linux/if.h> 45#include <linux/if_vlan.h> 46#include <linux/pci.h> 47#include <linux/pci-aspm.h> 48#include <linux/delay.h> 49#include <linux/interrupt.h> 50#include <linux/ip.h> 51#include <linux/tcp.h> 52#include <linux/sctp.h> 53#include <linux/if_ether.h> 54#include <linux/aer.h> 55#include <linux/prefetch.h> 56#include <linux/pm_runtime.h> 57#ifdef CONFIG_IGB_DCA 58#include <linux/dca.h> 59#endif 60#include "igb.h" 61 62#define MAJ 4 63#define MIN 0 64#define BUILD 1 65#define DRV_VERSION __stringify(MAJ) "." __stringify(MIN) "." \ 66__stringify(BUILD) "-k" 67char igb_driver_name[] = "igb"; 68char igb_driver_version[] = DRV_VERSION; 69static const char igb_driver_string[] = 70 "Intel(R) Gigabit Ethernet Network Driver"; 71static const char igb_copyright[] = "Copyright (c) 2007-2012 Intel Corporation."; 72 73static const struct e1000_info *igb_info_tbl[] = { 74 [board_82575] = &e1000_82575_info, 75}; 76 77static DEFINE_PCI_DEVICE_TABLE(igb_pci_tbl) = { 78 { PCI_VDEVICE(INTEL, E1000_DEV_ID_I211_COPPER), board_82575 }, 79 { PCI_VDEVICE(INTEL, E1000_DEV_ID_I210_COPPER), board_82575 }, 80 { PCI_VDEVICE(INTEL, E1000_DEV_ID_I210_FIBER), board_82575 }, 81 { PCI_VDEVICE(INTEL, E1000_DEV_ID_I210_SERDES), board_82575 }, 82 { PCI_VDEVICE(INTEL, E1000_DEV_ID_I210_SGMII), board_82575 }, 83 { PCI_VDEVICE(INTEL, E1000_DEV_ID_I350_COPPER), board_82575 }, 84 { PCI_VDEVICE(INTEL, E1000_DEV_ID_I350_FIBER), board_82575 }, 85 { PCI_VDEVICE(INTEL, E1000_DEV_ID_I350_SERDES), board_82575 }, 86 { PCI_VDEVICE(INTEL, E1000_DEV_ID_I350_SGMII), board_82575 }, 87 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82580_COPPER), board_82575 }, 88 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82580_FIBER), board_82575 }, 89 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82580_QUAD_FIBER), board_82575 }, 90 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82580_SERDES), board_82575 }, 91 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82580_SGMII), board_82575 }, 92 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82580_COPPER_DUAL), board_82575 }, 93 { PCI_VDEVICE(INTEL, E1000_DEV_ID_DH89XXCC_SGMII), board_82575 }, 94 { PCI_VDEVICE(INTEL, E1000_DEV_ID_DH89XXCC_SERDES), board_82575 }, 95 { PCI_VDEVICE(INTEL, E1000_DEV_ID_DH89XXCC_BACKPLANE), board_82575 }, 96 { PCI_VDEVICE(INTEL, E1000_DEV_ID_DH89XXCC_SFP), board_82575 }, 97 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82576), board_82575 }, 98 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82576_NS), board_82575 }, 99 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82576_NS_SERDES), board_82575 }, 100 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82576_FIBER), board_82575 }, 101 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82576_SERDES), board_82575 }, 102 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82576_SERDES_QUAD), board_82575 }, 103 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82576_QUAD_COPPER_ET2), board_82575 }, 104 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82576_QUAD_COPPER), board_82575 }, 105 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82575EB_COPPER), board_82575 }, 106 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82575EB_FIBER_SERDES), board_82575 }, 107 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82575GB_QUAD_COPPER), board_82575 }, 108 /* required last entry */ 109 {0, } 110}; 111 112MODULE_DEVICE_TABLE(pci, igb_pci_tbl); 113 114void igb_reset(struct igb_adapter *); 115static int igb_setup_all_tx_resources(struct igb_adapter *); 116static int igb_setup_all_rx_resources(struct igb_adapter *); 117static void igb_free_all_tx_resources(struct igb_adapter *); 118static void igb_free_all_rx_resources(struct igb_adapter *); 119static void igb_setup_mrqc(struct igb_adapter *); 120static int igb_probe(struct pci_dev *, const struct pci_device_id *); 121static void __devexit igb_remove(struct pci_dev *pdev); 122static int igb_sw_init(struct igb_adapter *); 123static int igb_open(struct net_device *); 124static int igb_close(struct net_device *); 125static void igb_configure_tx(struct igb_adapter *); 126static void igb_configure_rx(struct igb_adapter *); 127static void igb_clean_all_tx_rings(struct igb_adapter *); 128static void igb_clean_all_rx_rings(struct igb_adapter *); 129static void igb_clean_tx_ring(struct igb_ring *); 130static void igb_clean_rx_ring(struct igb_ring *); 131static void igb_set_rx_mode(struct net_device *); 132static void igb_update_phy_info(unsigned long); 133static void igb_watchdog(unsigned long); 134static void igb_watchdog_task(struct work_struct *); 135static netdev_tx_t igb_xmit_frame(struct sk_buff *skb, struct net_device *); 136static struct rtnl_link_stats64 *igb_get_stats64(struct net_device *dev, 137 struct rtnl_link_stats64 *stats); 138static int igb_change_mtu(struct net_device *, int); 139static int igb_set_mac(struct net_device *, void *); 140static void igb_set_uta(struct igb_adapter *adapter); 141static irqreturn_t igb_intr(int irq, void *); 142static irqreturn_t igb_intr_msi(int irq, void *); 143static irqreturn_t igb_msix_other(int irq, void *); 144static irqreturn_t igb_msix_ring(int irq, void *); 145#ifdef CONFIG_IGB_DCA 146static void igb_update_dca(struct igb_q_vector *); 147static void igb_setup_dca(struct igb_adapter *); 148#endif /* CONFIG_IGB_DCA */ 149static int igb_poll(struct napi_struct *, int); 150static bool igb_clean_tx_irq(struct igb_q_vector *); 151static bool igb_clean_rx_irq(struct igb_q_vector *, int); 152static int igb_ioctl(struct net_device *, struct ifreq *, int cmd); 153static void igb_tx_timeout(struct net_device *); 154static void igb_reset_task(struct work_struct *); 155static void igb_vlan_mode(struct net_device *netdev, netdev_features_t features); 156static int igb_vlan_rx_add_vid(struct net_device *, u16); 157static int igb_vlan_rx_kill_vid(struct net_device *, u16); 158static void igb_restore_vlan(struct igb_adapter *); 159static void igb_rar_set_qsel(struct igb_adapter *, u8 *, u32 , u8); 160static void igb_ping_all_vfs(struct igb_adapter *); 161static void igb_msg_task(struct igb_adapter *); 162static void igb_vmm_control(struct igb_adapter *); 163static int igb_set_vf_mac(struct igb_adapter *, int, unsigned char *); 164static void igb_restore_vf_multicasts(struct igb_adapter *adapter); 165static int igb_ndo_set_vf_mac(struct net_device *netdev, int vf, u8 *mac); 166static int igb_ndo_set_vf_vlan(struct net_device *netdev, 167 int vf, u16 vlan, u8 qos); 168static int igb_ndo_set_vf_bw(struct net_device *netdev, int vf, int tx_rate); 169static int igb_ndo_get_vf_config(struct net_device *netdev, int vf, 170 struct ifla_vf_info *ivi); 171static void igb_check_vf_rate_limit(struct igb_adapter *); 172 173#ifdef CONFIG_PCI_IOV 174static int igb_vf_configure(struct igb_adapter *adapter, int vf); 175static bool igb_vfs_are_assigned(struct igb_adapter *adapter); 176#endif 177 178#ifdef CONFIG_PM 179#ifdef CONFIG_PM_SLEEP 180static int igb_suspend(struct device *); 181#endif 182static int igb_resume(struct device *); 183#ifdef CONFIG_PM_RUNTIME 184static int igb_runtime_suspend(struct device *dev); 185static int igb_runtime_resume(struct device *dev); 186static int igb_runtime_idle(struct device *dev); 187#endif 188static const struct dev_pm_ops igb_pm_ops = { 189 SET_SYSTEM_SLEEP_PM_OPS(igb_suspend, igb_resume) 190 SET_RUNTIME_PM_OPS(igb_runtime_suspend, igb_runtime_resume, 191 igb_runtime_idle) 192}; 193#endif 194static void igb_shutdown(struct pci_dev *); 195#ifdef CONFIG_IGB_DCA 196static int igb_notify_dca(struct notifier_block *, unsigned long, void *); 197static struct notifier_block dca_notifier = { 198 .notifier_call = igb_notify_dca, 199 .next = NULL, 200 .priority = 0 201}; 202#endif 203#ifdef CONFIG_NET_POLL_CONTROLLER 204/* for netdump / net console */ 205static void igb_netpoll(struct net_device *); 206#endif 207#ifdef CONFIG_PCI_IOV 208static unsigned int max_vfs = 0; 209module_param(max_vfs, uint, 0); 210MODULE_PARM_DESC(max_vfs, "Maximum number of virtual functions to allocate " 211 "per physical function"); 212#endif /* CONFIG_PCI_IOV */ 213 214static pci_ers_result_t igb_io_error_detected(struct pci_dev *, 215 pci_channel_state_t); 216static pci_ers_result_t igb_io_slot_reset(struct pci_dev *); 217static void igb_io_resume(struct pci_dev *); 218 219static const struct pci_error_handlers igb_err_handler = { 220 .error_detected = igb_io_error_detected, 221 .slot_reset = igb_io_slot_reset, 222 .resume = igb_io_resume, 223}; 224 225static void igb_init_dmac(struct igb_adapter *adapter, u32 pba); 226 227static struct pci_driver igb_driver = { 228 .name = igb_driver_name, 229 .id_table = igb_pci_tbl, 230 .probe = igb_probe, 231 .remove = __devexit_p(igb_remove), 232#ifdef CONFIG_PM 233 .driver.pm = &igb_pm_ops, 234#endif 235 .shutdown = igb_shutdown, 236 .err_handler = &igb_err_handler 237}; 238 239MODULE_AUTHOR("Intel Corporation, <e1000-devel@lists.sourceforge.net>"); 240MODULE_DESCRIPTION("Intel(R) Gigabit Ethernet Network Driver"); 241MODULE_LICENSE("GPL"); 242MODULE_VERSION(DRV_VERSION); 243 244#define DEFAULT_MSG_ENABLE (NETIF_MSG_DRV|NETIF_MSG_PROBE|NETIF_MSG_LINK) 245static int debug = -1; 246module_param(debug, int, 0); 247MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)"); 248 249struct igb_reg_info { 250 u32 ofs; 251 char *name; 252}; 253 254static const struct igb_reg_info igb_reg_info_tbl[] = { 255 256 /* General Registers */ 257 {E1000_CTRL, "CTRL"}, 258 {E1000_STATUS, "STATUS"}, 259 {E1000_CTRL_EXT, "CTRL_EXT"}, 260 261 /* Interrupt Registers */ 262 {E1000_ICR, "ICR"}, 263 264 /* RX Registers */ 265 {E1000_RCTL, "RCTL"}, 266 {E1000_RDLEN(0), "RDLEN"}, 267 {E1000_RDH(0), "RDH"}, 268 {E1000_RDT(0), "RDT"}, 269 {E1000_RXDCTL(0), "RXDCTL"}, 270 {E1000_RDBAL(0), "RDBAL"}, 271 {E1000_RDBAH(0), "RDBAH"}, 272 273 /* TX Registers */ 274 {E1000_TCTL, "TCTL"}, 275 {E1000_TDBAL(0), "TDBAL"}, 276 {E1000_TDBAH(0), "TDBAH"}, 277 {E1000_TDLEN(0), "TDLEN"}, 278 {E1000_TDH(0), "TDH"}, 279 {E1000_TDT(0), "TDT"}, 280 {E1000_TXDCTL(0), "TXDCTL"}, 281 {E1000_TDFH, "TDFH"}, 282 {E1000_TDFT, "TDFT"}, 283 {E1000_TDFHS, "TDFHS"}, 284 {E1000_TDFPC, "TDFPC"}, 285 286 /* List Terminator */ 287 {} 288}; 289 290/* 291 * igb_regdump - register printout routine 292 */ 293static void igb_regdump(struct e1000_hw *hw, struct igb_reg_info *reginfo) 294{ 295 int n = 0; 296 char rname[16]; 297 u32 regs[8]; 298 299 switch (reginfo->ofs) { 300 case E1000_RDLEN(0): 301 for (n = 0; n < 4; n++) 302 regs[n] = rd32(E1000_RDLEN(n)); 303 break; 304 case E1000_RDH(0): 305 for (n = 0; n < 4; n++) 306 regs[n] = rd32(E1000_RDH(n)); 307 break; 308 case E1000_RDT(0): 309 for (n = 0; n < 4; n++) 310 regs[n] = rd32(E1000_RDT(n)); 311 break; 312 case E1000_RXDCTL(0): 313 for (n = 0; n < 4; n++) 314 regs[n] = rd32(E1000_RXDCTL(n)); 315 break; 316 case E1000_RDBAL(0): 317 for (n = 0; n < 4; n++) 318 regs[n] = rd32(E1000_RDBAL(n)); 319 break; 320 case E1000_RDBAH(0): 321 for (n = 0; n < 4; n++) 322 regs[n] = rd32(E1000_RDBAH(n)); 323 break; 324 case E1000_TDBAL(0): 325 for (n = 0; n < 4; n++) 326 regs[n] = rd32(E1000_RDBAL(n)); 327 break; 328 case E1000_TDBAH(0): 329 for (n = 0; n < 4; n++) 330 regs[n] = rd32(E1000_TDBAH(n)); 331 break; 332 case E1000_TDLEN(0): 333 for (n = 0; n < 4; n++) 334 regs[n] = rd32(E1000_TDLEN(n)); 335 break; 336 case E1000_TDH(0): 337 for (n = 0; n < 4; n++) 338 regs[n] = rd32(E1000_TDH(n)); 339 break; 340 case E1000_TDT(0): 341 for (n = 0; n < 4; n++) 342 regs[n] = rd32(E1000_TDT(n)); 343 break; 344 case E1000_TXDCTL(0): 345 for (n = 0; n < 4; n++) 346 regs[n] = rd32(E1000_TXDCTL(n)); 347 break; 348 default: 349 pr_info("%-15s %08x\n", reginfo->name, rd32(reginfo->ofs)); 350 return; 351 } 352 353 snprintf(rname, 16, "%s%s", reginfo->name, "[0-3]"); 354 pr_info("%-15s %08x %08x %08x %08x\n", rname, regs[0], regs[1], 355 regs[2], regs[3]); 356} 357 358/* 359 * igb_dump - Print registers, tx-rings and rx-rings 360 */ 361static void igb_dump(struct igb_adapter *adapter) 362{ 363 struct net_device *netdev = adapter->netdev; 364 struct e1000_hw *hw = &adapter->hw; 365 struct igb_reg_info *reginfo; 366 struct igb_ring *tx_ring; 367 union e1000_adv_tx_desc *tx_desc; 368 struct my_u0 { u64 a; u64 b; } *u0; 369 struct igb_ring *rx_ring; 370 union e1000_adv_rx_desc *rx_desc; 371 u32 staterr; 372 u16 i, n; 373 374 if (!netif_msg_hw(adapter)) 375 return; 376 377 /* Print netdevice Info */ 378 if (netdev) { 379 dev_info(&adapter->pdev->dev, "Net device Info\n"); 380 pr_info("Device Name state trans_start " 381 "last_rx\n"); 382 pr_info("%-15s %016lX %016lX %016lX\n", netdev->name, 383 netdev->state, netdev->trans_start, netdev->last_rx); 384 } 385 386 /* Print Registers */ 387 dev_info(&adapter->pdev->dev, "Register Dump\n"); 388 pr_info(" Register Name Value\n"); 389 for (reginfo = (struct igb_reg_info *)igb_reg_info_tbl; 390 reginfo->name; reginfo++) { 391 igb_regdump(hw, reginfo); 392 } 393 394 /* Print TX Ring Summary */ 395 if (!netdev || !netif_running(netdev)) 396 goto exit; 397 398 dev_info(&adapter->pdev->dev, "TX Rings Summary\n"); 399 pr_info("Queue [NTU] [NTC] [bi(ntc)->dma ] leng ntw timestamp\n"); 400 for (n = 0; n < adapter->num_tx_queues; n++) { 401 struct igb_tx_buffer *buffer_info; 402 tx_ring = adapter->tx_ring[n]; 403 buffer_info = &tx_ring->tx_buffer_info[tx_ring->next_to_clean]; 404 pr_info(" %5d %5X %5X %016llX %04X %p %016llX\n", 405 n, tx_ring->next_to_use, tx_ring->next_to_clean, 406 (u64)dma_unmap_addr(buffer_info, dma), 407 dma_unmap_len(buffer_info, len), 408 buffer_info->next_to_watch, 409 (u64)buffer_info->time_stamp); 410 } 411 412 /* Print TX Rings */ 413 if (!netif_msg_tx_done(adapter)) 414 goto rx_ring_summary; 415 416 dev_info(&adapter->pdev->dev, "TX Rings Dump\n"); 417 418 /* Transmit Descriptor Formats 419 * 420 * Advanced Transmit Descriptor 421 * +--------------------------------------------------------------+ 422 * 0 | Buffer Address [63:0] | 423 * +--------------------------------------------------------------+ 424 * 8 | PAYLEN | PORTS |CC|IDX | STA | DCMD |DTYP|MAC|RSV| DTALEN | 425 * +--------------------------------------------------------------+ 426 * 63 46 45 40 39 38 36 35 32 31 24 15 0 427 */ 428 429 for (n = 0; n < adapter->num_tx_queues; n++) { 430 tx_ring = adapter->tx_ring[n]; 431 pr_info("------------------------------------\n"); 432 pr_info("TX QUEUE INDEX = %d\n", tx_ring->queue_index); 433 pr_info("------------------------------------\n"); 434 pr_info("T [desc] [address 63:0 ] [PlPOCIStDDM Ln] " 435 "[bi->dma ] leng ntw timestamp " 436 "bi->skb\n"); 437 438 for (i = 0; tx_ring->desc && (i < tx_ring->count); i++) { 439 const char *next_desc; 440 struct igb_tx_buffer *buffer_info; 441 tx_desc = IGB_TX_DESC(tx_ring, i); 442 buffer_info = &tx_ring->tx_buffer_info[i]; 443 u0 = (struct my_u0 *)tx_desc; 444 if (i == tx_ring->next_to_use && 445 i == tx_ring->next_to_clean) 446 next_desc = " NTC/U"; 447 else if (i == tx_ring->next_to_use) 448 next_desc = " NTU"; 449 else if (i == tx_ring->next_to_clean) 450 next_desc = " NTC"; 451 else 452 next_desc = ""; 453 454 pr_info("T [0x%03X] %016llX %016llX %016llX" 455 " %04X %p %016llX %p%s\n", i, 456 le64_to_cpu(u0->a), 457 le64_to_cpu(u0->b), 458 (u64)dma_unmap_addr(buffer_info, dma), 459 dma_unmap_len(buffer_info, len), 460 buffer_info->next_to_watch, 461 (u64)buffer_info->time_stamp, 462 buffer_info->skb, next_desc); 463 464 if (netif_msg_pktdata(adapter) && buffer_info->skb) 465 print_hex_dump(KERN_INFO, "", 466 DUMP_PREFIX_ADDRESS, 467 16, 1, buffer_info->skb->data, 468 dma_unmap_len(buffer_info, len), 469 true); 470 } 471 } 472 473 /* Print RX Rings Summary */ 474rx_ring_summary: 475 dev_info(&adapter->pdev->dev, "RX Rings Summary\n"); 476 pr_info("Queue [NTU] [NTC]\n"); 477 for (n = 0; n < adapter->num_rx_queues; n++) { 478 rx_ring = adapter->rx_ring[n]; 479 pr_info(" %5d %5X %5X\n", 480 n, rx_ring->next_to_use, rx_ring->next_to_clean); 481 } 482 483 /* Print RX Rings */ 484 if (!netif_msg_rx_status(adapter)) 485 goto exit; 486 487 dev_info(&adapter->pdev->dev, "RX Rings Dump\n"); 488 489 /* Advanced Receive Descriptor (Read) Format 490 * 63 1 0 491 * +-----------------------------------------------------+ 492 * 0 | Packet Buffer Address [63:1] |A0/NSE| 493 * +----------------------------------------------+------+ 494 * 8 | Header Buffer Address [63:1] | DD | 495 * +-----------------------------------------------------+ 496 * 497 * 498 * Advanced Receive Descriptor (Write-Back) Format 499 * 500 * 63 48 47 32 31 30 21 20 17 16 4 3 0 501 * +------------------------------------------------------+ 502 * 0 | Packet IP |SPH| HDR_LEN | RSV|Packet| RSS | 503 * | Checksum Ident | | | | Type | Type | 504 * +------------------------------------------------------+ 505 * 8 | VLAN Tag | Length | Extended Error | Extended Status | 506 * +------------------------------------------------------+ 507 * 63 48 47 32 31 20 19 0 508 */ 509 510 for (n = 0; n < adapter->num_rx_queues; n++) { 511 rx_ring = adapter->rx_ring[n]; 512 pr_info("------------------------------------\n"); 513 pr_info("RX QUEUE INDEX = %d\n", rx_ring->queue_index); 514 pr_info("------------------------------------\n"); 515 pr_info("R [desc] [ PktBuf A0] [ HeadBuf DD] " 516 "[bi->dma ] [bi->skb] <-- Adv Rx Read format\n"); 517 pr_info("RWB[desc] [PcsmIpSHl PtRs] [vl er S cks ln] -----" 518 "----------- [bi->skb] <-- Adv Rx Write-Back format\n"); 519 520 for (i = 0; i < rx_ring->count; i++) { 521 const char *next_desc; 522 struct igb_rx_buffer *buffer_info; 523 buffer_info = &rx_ring->rx_buffer_info[i]; 524 rx_desc = IGB_RX_DESC(rx_ring, i); 525 u0 = (struct my_u0 *)rx_desc; 526 staterr = le32_to_cpu(rx_desc->wb.upper.status_error); 527 528 if (i == rx_ring->next_to_use) 529 next_desc = " NTU"; 530 else if (i == rx_ring->next_to_clean) 531 next_desc = " NTC"; 532 else 533 next_desc = ""; 534 535 if (staterr & E1000_RXD_STAT_DD) { 536 /* Descriptor Done */ 537 pr_info("%s[0x%03X] %016llX %016llX -------" 538 "--------- %p%s\n", "RWB", i, 539 le64_to_cpu(u0->a), 540 le64_to_cpu(u0->b), 541 buffer_info->skb, next_desc); 542 } else { 543 pr_info("%s[0x%03X] %016llX %016llX %016llX" 544 " %p%s\n", "R ", i, 545 le64_to_cpu(u0->a), 546 le64_to_cpu(u0->b), 547 (u64)buffer_info->dma, 548 buffer_info->skb, next_desc); 549 550 if (netif_msg_pktdata(adapter) && 551 buffer_info->dma && buffer_info->skb) { 552 print_hex_dump(KERN_INFO, "", 553 DUMP_PREFIX_ADDRESS, 554 16, 1, buffer_info->skb->data, 555 IGB_RX_HDR_LEN, true); 556 print_hex_dump(KERN_INFO, "", 557 DUMP_PREFIX_ADDRESS, 558 16, 1, 559 page_address(buffer_info->page) + 560 buffer_info->page_offset, 561 PAGE_SIZE/2, true); 562 } 563 } 564 } 565 } 566 567exit: 568 return; 569} 570 571/** 572 * igb_get_hw_dev - return device 573 * used by hardware layer to print debugging information 574 **/ 575struct net_device *igb_get_hw_dev(struct e1000_hw *hw) 576{ 577 struct igb_adapter *adapter = hw->back; 578 return adapter->netdev; 579} 580 581/** 582 * igb_init_module - Driver Registration Routine 583 * 584 * igb_init_module is the first routine called when the driver is 585 * loaded. All it does is register with the PCI subsystem. 586 **/ 587static int __init igb_init_module(void) 588{ 589 int ret; 590 pr_info("%s - version %s\n", 591 igb_driver_string, igb_driver_version); 592 593 pr_info("%s\n", igb_copyright); 594 595#ifdef CONFIG_IGB_DCA 596 dca_register_notify(&dca_notifier); 597#endif 598 ret = pci_register_driver(&igb_driver); 599 return ret; 600} 601 602module_init(igb_init_module); 603 604/** 605 * igb_exit_module - Driver Exit Cleanup Routine 606 * 607 * igb_exit_module is called just before the driver is removed 608 * from memory. 609 **/ 610static void __exit igb_exit_module(void) 611{ 612#ifdef CONFIG_IGB_DCA 613 dca_unregister_notify(&dca_notifier); 614#endif 615 pci_unregister_driver(&igb_driver); 616} 617 618module_exit(igb_exit_module); 619 620#define Q_IDX_82576(i) (((i & 0x1) << 3) + (i >> 1)) 621/** 622 * igb_cache_ring_register - Descriptor ring to register mapping 623 * @adapter: board private structure to initialize 624 * 625 * Once we know the feature-set enabled for the device, we'll cache 626 * the register offset the descriptor ring is assigned to. 627 **/ 628static void igb_cache_ring_register(struct igb_adapter *adapter) 629{ 630 int i = 0, j = 0; 631 u32 rbase_offset = adapter->vfs_allocated_count; 632 633 switch (adapter->hw.mac.type) { 634 case e1000_82576: 635 /* The queues are allocated for virtualization such that VF 0 636 * is allocated queues 0 and 8, VF 1 queues 1 and 9, etc. 637 * In order to avoid collision we start at the first free queue 638 * and continue consuming queues in the same sequence 639 */ 640 if (adapter->vfs_allocated_count) { 641 for (; i < adapter->rss_queues; i++) 642 adapter->rx_ring[i]->reg_idx = rbase_offset + 643 Q_IDX_82576(i); 644 } 645 case e1000_82575: 646 case e1000_82580: 647 case e1000_i350: 648 case e1000_i210: 649 case e1000_i211: 650 default: 651 for (; i < adapter->num_rx_queues; i++) 652 adapter->rx_ring[i]->reg_idx = rbase_offset + i; 653 for (; j < adapter->num_tx_queues; j++) 654 adapter->tx_ring[j]->reg_idx = rbase_offset + j; 655 break; 656 } 657} 658 659static void igb_free_queues(struct igb_adapter *adapter) 660{ 661 int i; 662 663 for (i = 0; i < adapter->num_tx_queues; i++) { 664 kfree(adapter->tx_ring[i]); 665 adapter->tx_ring[i] = NULL; 666 } 667 for (i = 0; i < adapter->num_rx_queues; i++) { 668 kfree(adapter->rx_ring[i]); 669 adapter->rx_ring[i] = NULL; 670 } 671 adapter->num_rx_queues = 0; 672 adapter->num_tx_queues = 0; 673} 674 675/** 676 * igb_alloc_queues - Allocate memory for all rings 677 * @adapter: board private structure to initialize 678 * 679 * We allocate one ring per queue at run-time since we don't know the 680 * number of queues at compile-time. 681 **/ 682static int igb_alloc_queues(struct igb_adapter *adapter) 683{ 684 struct igb_ring *ring; 685 int i; 686 687 for (i = 0; i < adapter->num_tx_queues; i++) { 688 ring = kzalloc(sizeof(struct igb_ring), GFP_KERNEL); 689 if (!ring) 690 goto err; 691 ring->count = adapter->tx_ring_count; 692 ring->queue_index = i; 693 ring->dev = &adapter->pdev->dev; 694 ring->netdev = adapter->netdev; 695 /* For 82575, context index must be unique per ring. */ 696 if (adapter->hw.mac.type == e1000_82575) 697 set_bit(IGB_RING_FLAG_TX_CTX_IDX, &ring->flags); 698 adapter->tx_ring[i] = ring; 699 } 700 701 for (i = 0; i < adapter->num_rx_queues; i++) { 702 ring = kzalloc(sizeof(struct igb_ring), GFP_KERNEL); 703 if (!ring) 704 goto err; 705 ring->count = adapter->rx_ring_count; 706 ring->queue_index = i; 707 ring->dev = &adapter->pdev->dev; 708 ring->netdev = adapter->netdev; 709 /* set flag indicating ring supports SCTP checksum offload */ 710 if (adapter->hw.mac.type >= e1000_82576) 711 set_bit(IGB_RING_FLAG_RX_SCTP_CSUM, &ring->flags); 712 713 /* 714 * On i350, i210, and i211, loopback VLAN packets 715 * have the tag byte-swapped. 716 * */ 717 if (adapter->hw.mac.type >= e1000_i350) 718 set_bit(IGB_RING_FLAG_RX_LB_VLAN_BSWAP, &ring->flags); 719 720 adapter->rx_ring[i] = ring; 721 } 722 723 igb_cache_ring_register(adapter); 724 725 return 0; 726 727err: 728 igb_free_queues(adapter); 729 730 return -ENOMEM; 731} 732 733/** 734 * igb_write_ivar - configure ivar for given MSI-X vector 735 * @hw: pointer to the HW structure 736 * @msix_vector: vector number we are allocating to a given ring 737 * @index: row index of IVAR register to write within IVAR table 738 * @offset: column offset of in IVAR, should be multiple of 8 739 * 740 * This function is intended to handle the writing of the IVAR register 741 * for adapters 82576 and newer. The IVAR table consists of 2 columns, 742 * each containing an cause allocation for an Rx and Tx ring, and a 743 * variable number of rows depending on the number of queues supported. 744 **/ 745static void igb_write_ivar(struct e1000_hw *hw, int msix_vector, 746 int index, int offset) 747{ 748 u32 ivar = array_rd32(E1000_IVAR0, index); 749 750 /* clear any bits that are currently set */ 751 ivar &= ~((u32)0xFF << offset); 752 753 /* write vector and valid bit */ 754 ivar |= (msix_vector | E1000_IVAR_VALID) << offset; 755 756 array_wr32(E1000_IVAR0, index, ivar); 757} 758 759#define IGB_N0_QUEUE -1 760static void igb_assign_vector(struct igb_q_vector *q_vector, int msix_vector) 761{ 762 struct igb_adapter *adapter = q_vector->adapter; 763 struct e1000_hw *hw = &adapter->hw; 764 int rx_queue = IGB_N0_QUEUE; 765 int tx_queue = IGB_N0_QUEUE; 766 u32 msixbm = 0; 767 768 if (q_vector->rx.ring) 769 rx_queue = q_vector->rx.ring->reg_idx; 770 if (q_vector->tx.ring) 771 tx_queue = q_vector->tx.ring->reg_idx; 772 773 switch (hw->mac.type) { 774 case e1000_82575: 775 /* The 82575 assigns vectors using a bitmask, which matches the 776 bitmask for the EICR/EIMS/EIMC registers. To assign one 777 or more queues to a vector, we write the appropriate bits 778 into the MSIXBM register for that vector. */ 779 if (rx_queue > IGB_N0_QUEUE) 780 msixbm = E1000_EICR_RX_QUEUE0 << rx_queue; 781 if (tx_queue > IGB_N0_QUEUE) 782 msixbm |= E1000_EICR_TX_QUEUE0 << tx_queue; 783 if (!adapter->msix_entries && msix_vector == 0) 784 msixbm |= E1000_EIMS_OTHER; 785 array_wr32(E1000_MSIXBM(0), msix_vector, msixbm); 786 q_vector->eims_value = msixbm; 787 break; 788 case e1000_82576: 789 /* 790 * 82576 uses a table that essentially consists of 2 columns 791 * with 8 rows. The ordering is column-major so we use the 792 * lower 3 bits as the row index, and the 4th bit as the 793 * column offset. 794 */ 795 if (rx_queue > IGB_N0_QUEUE) 796 igb_write_ivar(hw, msix_vector, 797 rx_queue & 0x7, 798 (rx_queue & 0x8) << 1); 799 if (tx_queue > IGB_N0_QUEUE) 800 igb_write_ivar(hw, msix_vector, 801 tx_queue & 0x7, 802 ((tx_queue & 0x8) << 1) + 8); 803 q_vector->eims_value = 1 << msix_vector; 804 break; 805 case e1000_82580: 806 case e1000_i350: 807 case e1000_i210: 808 case e1000_i211: 809 /* 810 * On 82580 and newer adapters the scheme is similar to 82576 811 * however instead of ordering column-major we have things 812 * ordered row-major. So we traverse the table by using 813 * bit 0 as the column offset, and the remaining bits as the 814 * row index. 815 */ 816 if (rx_queue > IGB_N0_QUEUE) 817 igb_write_ivar(hw, msix_vector, 818 rx_queue >> 1, 819 (rx_queue & 0x1) << 4); 820 if (tx_queue > IGB_N0_QUEUE) 821 igb_write_ivar(hw, msix_vector, 822 tx_queue >> 1, 823 ((tx_queue & 0x1) << 4) + 8); 824 q_vector->eims_value = 1 << msix_vector; 825 break; 826 default: 827 BUG(); 828 break; 829 } 830 831 /* add q_vector eims value to global eims_enable_mask */ 832 adapter->eims_enable_mask |= q_vector->eims_value; 833 834 /* configure q_vector to set itr on first interrupt */ 835 q_vector->set_itr = 1; 836} 837 838/** 839 * igb_configure_msix - Configure MSI-X hardware 840 * 841 * igb_configure_msix sets up the hardware to properly 842 * generate MSI-X interrupts. 843 **/ 844static void igb_configure_msix(struct igb_adapter *adapter) 845{ 846 u32 tmp; 847 int i, vector = 0; 848 struct e1000_hw *hw = &adapter->hw; 849 850 adapter->eims_enable_mask = 0; 851 852 /* set vector for other causes, i.e. link changes */ 853 switch (hw->mac.type) { 854 case e1000_82575: 855 tmp = rd32(E1000_CTRL_EXT); 856 /* enable MSI-X PBA support*/ 857 tmp |= E1000_CTRL_EXT_PBA_CLR; 858 859 /* Auto-Mask interrupts upon ICR read. */ 860 tmp |= E1000_CTRL_EXT_EIAME; 861 tmp |= E1000_CTRL_EXT_IRCA; 862 863 wr32(E1000_CTRL_EXT, tmp); 864 865 /* enable msix_other interrupt */ 866 array_wr32(E1000_MSIXBM(0), vector++, 867 E1000_EIMS_OTHER); 868 adapter->eims_other = E1000_EIMS_OTHER; 869 870 break; 871 872 case e1000_82576: 873 case e1000_82580: 874 case e1000_i350: 875 case e1000_i210: 876 case e1000_i211: 877 /* Turn on MSI-X capability first, or our settings 878 * won't stick. And it will take days to debug. */ 879 wr32(E1000_GPIE, E1000_GPIE_MSIX_MODE | 880 E1000_GPIE_PBA | E1000_GPIE_EIAME | 881 E1000_GPIE_NSICR); 882 883 /* enable msix_other interrupt */ 884 adapter->eims_other = 1 << vector; 885 tmp = (vector++ | E1000_IVAR_VALID) << 8; 886 887 wr32(E1000_IVAR_MISC, tmp); 888 break; 889 default: 890 /* do nothing, since nothing else supports MSI-X */ 891 break; 892 } /* switch (hw->mac.type) */ 893 894 adapter->eims_enable_mask |= adapter->eims_other; 895 896 for (i = 0; i < adapter->num_q_vectors; i++) 897 igb_assign_vector(adapter->q_vector[i], vector++); 898 899 wrfl(); 900} 901 902/** 903 * igb_request_msix - Initialize MSI-X interrupts 904 * 905 * igb_request_msix allocates MSI-X vectors and requests interrupts from the 906 * kernel. 907 **/ 908static int igb_request_msix(struct igb_adapter *adapter) 909{ 910 struct net_device *netdev = adapter->netdev; 911 struct e1000_hw *hw = &adapter->hw; 912 int i, err = 0, vector = 0; 913 914 err = request_irq(adapter->msix_entries[vector].vector, 915 igb_msix_other, 0, netdev->name, adapter); 916 if (err) 917 goto out; 918 vector++; 919 920 for (i = 0; i < adapter->num_q_vectors; i++) { 921 struct igb_q_vector *q_vector = adapter->q_vector[i]; 922 923 q_vector->itr_register = hw->hw_addr + E1000_EITR(vector); 924 925 if (q_vector->rx.ring && q_vector->tx.ring) 926 sprintf(q_vector->name, "%s-TxRx-%u", netdev->name, 927 q_vector->rx.ring->queue_index); 928 else if (q_vector->tx.ring) 929 sprintf(q_vector->name, "%s-tx-%u", netdev->name, 930 q_vector->tx.ring->queue_index); 931 else if (q_vector->rx.ring) 932 sprintf(q_vector->name, "%s-rx-%u", netdev->name, 933 q_vector->rx.ring->queue_index); 934 else 935 sprintf(q_vector->name, "%s-unused", netdev->name); 936 937 err = request_irq(adapter->msix_entries[vector].vector, 938 igb_msix_ring, 0, q_vector->name, 939 q_vector); 940 if (err) 941 goto out; 942 vector++; 943 } 944 945 igb_configure_msix(adapter); 946 return 0; 947out: 948 return err; 949} 950 951static void igb_reset_interrupt_capability(struct igb_adapter *adapter) 952{ 953 if (adapter->msix_entries) { 954 pci_disable_msix(adapter->pdev); 955 kfree(adapter->msix_entries); 956 adapter->msix_entries = NULL; 957 } else if (adapter->flags & IGB_FLAG_HAS_MSI) { 958 pci_disable_msi(adapter->pdev); 959 } 960} 961 962/** 963 * igb_free_q_vectors - Free memory allocated for interrupt vectors 964 * @adapter: board private structure to initialize 965 * 966 * This function frees the memory allocated to the q_vectors. In addition if 967 * NAPI is enabled it will delete any references to the NAPI struct prior 968 * to freeing the q_vector. 969 **/ 970static void igb_free_q_vectors(struct igb_adapter *adapter) 971{ 972 int v_idx; 973 974 for (v_idx = 0; v_idx < adapter->num_q_vectors; v_idx++) { 975 struct igb_q_vector *q_vector = adapter->q_vector[v_idx]; 976 adapter->q_vector[v_idx] = NULL; 977 if (!q_vector) 978 continue; 979 netif_napi_del(&q_vector->napi); 980 kfree(q_vector); 981 } 982 adapter->num_q_vectors = 0; 983} 984 985/** 986 * igb_clear_interrupt_scheme - reset the device to a state of no interrupts 987 * 988 * This function resets the device so that it has 0 rx queues, tx queues, and 989 * MSI-X interrupts allocated. 990 */ 991static void igb_clear_interrupt_scheme(struct igb_adapter *adapter) 992{ 993 igb_free_queues(adapter); 994 igb_free_q_vectors(adapter); 995 igb_reset_interrupt_capability(adapter); 996} 997 998/** 999 * igb_set_interrupt_capability - set MSI or MSI-X if supported 1000 * 1001 * Attempt to configure interrupts using the best available 1002 * capabilities of the hardware and kernel. 1003 **/ 1004static int igb_set_interrupt_capability(struct igb_adapter *adapter) 1005{ 1006 int err; 1007 int numvecs, i; 1008 1009 /* Number of supported queues. */ 1010 adapter->num_rx_queues = adapter->rss_queues; 1011 if (adapter->vfs_allocated_count) 1012 adapter->num_tx_queues = 1; 1013 else 1014 adapter->num_tx_queues = adapter->rss_queues; 1015 1016 /* start with one vector for every rx queue */ 1017 numvecs = adapter->num_rx_queues; 1018 1019 /* if tx handler is separate add 1 for every tx queue */ 1020 if (!(adapter->flags & IGB_FLAG_QUEUE_PAIRS)) 1021 numvecs += adapter->num_tx_queues; 1022 1023 /* store the number of vectors reserved for queues */ 1024 adapter->num_q_vectors = numvecs; 1025 1026 /* add 1 vector for link status interrupts */ 1027 numvecs++; 1028 adapter->msix_entries = kcalloc(numvecs, sizeof(struct msix_entry), 1029 GFP_KERNEL); 1030 1031 if (!adapter->msix_entries) 1032 goto msi_only; 1033 1034 for (i = 0; i < numvecs; i++) 1035 adapter->msix_entries[i].entry = i; 1036 1037 err = pci_enable_msix(adapter->pdev, 1038 adapter->msix_entries, 1039 numvecs); 1040 if (err == 0) 1041 goto out; 1042 1043 igb_reset_interrupt_capability(adapter); 1044 1045 /* If we can't do MSI-X, try MSI */ 1046msi_only: 1047#ifdef CONFIG_PCI_IOV 1048 /* disable SR-IOV for non MSI-X configurations */ 1049 if (adapter->vf_data) { 1050 struct e1000_hw *hw = &adapter->hw; 1051 /* disable iov and allow time for transactions to clear */ 1052 pci_disable_sriov(adapter->pdev); 1053 msleep(500); 1054 1055 kfree(adapter->vf_data); 1056 adapter->vf_data = NULL; 1057 wr32(E1000_IOVCTL, E1000_IOVCTL_REUSE_VFQ); 1058 wrfl(); 1059 msleep(100); 1060 dev_info(&adapter->pdev->dev, "IOV Disabled\n"); 1061 } 1062#endif 1063 adapter->vfs_allocated_count = 0; 1064 adapter->rss_queues = 1; 1065 adapter->flags |= IGB_FLAG_QUEUE_PAIRS; 1066 adapter->num_rx_queues = 1; 1067 adapter->num_tx_queues = 1; 1068 adapter->num_q_vectors = 1; 1069 if (!pci_enable_msi(adapter->pdev)) 1070 adapter->flags |= IGB_FLAG_HAS_MSI; 1071out: 1072 /* Notify the stack of the (possibly) reduced queue counts. */ 1073 rtnl_lock(); 1074 netif_set_real_num_tx_queues(adapter->netdev, adapter->num_tx_queues); 1075 err = netif_set_real_num_rx_queues(adapter->netdev, 1076 adapter->num_rx_queues); 1077 rtnl_unlock(); 1078 return err; 1079} 1080 1081/** 1082 * igb_alloc_q_vectors - Allocate memory for interrupt vectors 1083 * @adapter: board private structure to initialize 1084 * 1085 * We allocate one q_vector per queue interrupt. If allocation fails we 1086 * return -ENOMEM. 1087 **/ 1088static int igb_alloc_q_vectors(struct igb_adapter *adapter) 1089{ 1090 struct igb_q_vector *q_vector; 1091 struct e1000_hw *hw = &adapter->hw; 1092 int v_idx; 1093 1094 for (v_idx = 0; v_idx < adapter->num_q_vectors; v_idx++) { 1095 q_vector = kzalloc(sizeof(struct igb_q_vector), 1096 GFP_KERNEL); 1097 if (!q_vector) 1098 goto err_out; 1099 q_vector->adapter = adapter; 1100 q_vector->itr_register = hw->hw_addr + E1000_EITR(0); 1101 q_vector->itr_val = IGB_START_ITR; 1102 netif_napi_add(adapter->netdev, &q_vector->napi, igb_poll, 64); 1103 adapter->q_vector[v_idx] = q_vector; 1104 } 1105 1106 return 0; 1107 1108err_out: 1109 igb_free_q_vectors(adapter); 1110 return -ENOMEM; 1111} 1112 1113static void igb_map_rx_ring_to_vector(struct igb_adapter *adapter, 1114 int ring_idx, int v_idx) 1115{ 1116 struct igb_q_vector *q_vector = adapter->q_vector[v_idx]; 1117 1118 q_vector->rx.ring = adapter->rx_ring[ring_idx]; 1119 q_vector->rx.ring->q_vector = q_vector; 1120 q_vector->rx.count++; 1121 q_vector->itr_val = adapter->rx_itr_setting; 1122 if (q_vector->itr_val && q_vector->itr_val <= 3) 1123 q_vector->itr_val = IGB_START_ITR; 1124} 1125 1126static void igb_map_tx_ring_to_vector(struct igb_adapter *adapter, 1127 int ring_idx, int v_idx) 1128{ 1129 struct igb_q_vector *q_vector = adapter->q_vector[v_idx]; 1130 1131 q_vector->tx.ring = adapter->tx_ring[ring_idx]; 1132 q_vector->tx.ring->q_vector = q_vector; 1133 q_vector->tx.count++; 1134 q_vector->itr_val = adapter->tx_itr_setting; 1135 q_vector->tx.work_limit = adapter->tx_work_limit; 1136 if (q_vector->itr_val && q_vector->itr_val <= 3) 1137 q_vector->itr_val = IGB_START_ITR; 1138} 1139 1140/** 1141 * igb_map_ring_to_vector - maps allocated queues to vectors 1142 * 1143 * This function maps the recently allocated queues to vectors. 1144 **/ 1145static int igb_map_ring_to_vector(struct igb_adapter *adapter) 1146{ 1147 int i; 1148 int v_idx = 0; 1149 1150 if ((adapter->num_q_vectors < adapter->num_rx_queues) || 1151 (adapter->num_q_vectors < adapter->num_tx_queues)) 1152 return -ENOMEM; 1153 1154 if (adapter->num_q_vectors >= 1155 (adapter->num_rx_queues + adapter->num_tx_queues)) { 1156 for (i = 0; i < adapter->num_rx_queues; i++) 1157 igb_map_rx_ring_to_vector(adapter, i, v_idx++); 1158 for (i = 0; i < adapter->num_tx_queues; i++) 1159 igb_map_tx_ring_to_vector(adapter, i, v_idx++); 1160 } else { 1161 for (i = 0; i < adapter->num_rx_queues; i++) { 1162 if (i < adapter->num_tx_queues) 1163 igb_map_tx_ring_to_vector(adapter, i, v_idx); 1164 igb_map_rx_ring_to_vector(adapter, i, v_idx++); 1165 } 1166 for (; i < adapter->num_tx_queues; i++) 1167 igb_map_tx_ring_to_vector(adapter, i, v_idx++); 1168 } 1169 return 0; 1170} 1171 1172/** 1173 * igb_init_interrupt_scheme - initialize interrupts, allocate queues/vectors 1174 * 1175 * This function initializes the interrupts and allocates all of the queues. 1176 **/ 1177static int igb_init_interrupt_scheme(struct igb_adapter *adapter) 1178{ 1179 struct pci_dev *pdev = adapter->pdev; 1180 int err; 1181 1182 err = igb_set_interrupt_capability(adapter); 1183 if (err) 1184 return err; 1185 1186 err = igb_alloc_q_vectors(adapter); 1187 if (err) { 1188 dev_err(&pdev->dev, "Unable to allocate memory for vectors\n"); 1189 goto err_alloc_q_vectors; 1190 } 1191 1192 err = igb_alloc_queues(adapter); 1193 if (err) { 1194 dev_err(&pdev->dev, "Unable to allocate memory for queues\n"); 1195 goto err_alloc_queues; 1196 } 1197 1198 err = igb_map_ring_to_vector(adapter); 1199 if (err) { 1200 dev_err(&pdev->dev, "Invalid q_vector to ring mapping\n"); 1201 goto err_map_queues; 1202 } 1203 1204 1205 return 0; 1206err_map_queues: 1207 igb_free_queues(adapter); 1208err_alloc_queues: 1209 igb_free_q_vectors(adapter); 1210err_alloc_q_vectors: 1211 igb_reset_interrupt_capability(adapter); 1212 return err; 1213} 1214 1215/** 1216 * igb_request_irq - initialize interrupts 1217 * 1218 * Attempts to configure interrupts using the best available 1219 * capabilities of the hardware and kernel. 1220 **/ 1221static int igb_request_irq(struct igb_adapter *adapter) 1222{ 1223 struct net_device *netdev = adapter->netdev; 1224 struct pci_dev *pdev = adapter->pdev; 1225 int err = 0; 1226 1227 if (adapter->msix_entries) { 1228 err = igb_request_msix(adapter); 1229 if (!err) 1230 goto request_done; 1231 /* fall back to MSI */ 1232 igb_clear_interrupt_scheme(adapter); 1233 if (!pci_enable_msi(pdev)) 1234 adapter->flags |= IGB_FLAG_HAS_MSI; 1235 igb_free_all_tx_resources(adapter); 1236 igb_free_all_rx_resources(adapter); 1237 adapter->num_tx_queues = 1; 1238 adapter->num_rx_queues = 1; 1239 adapter->num_q_vectors = 1; 1240 err = igb_alloc_q_vectors(adapter); 1241 if (err) { 1242 dev_err(&pdev->dev, 1243 "Unable to allocate memory for vectors\n"); 1244 goto request_done; 1245 } 1246 err = igb_alloc_queues(adapter); 1247 if (err) { 1248 dev_err(&pdev->dev, 1249 "Unable to allocate memory for queues\n"); 1250 igb_free_q_vectors(adapter); 1251 goto request_done; 1252 } 1253 igb_setup_all_tx_resources(adapter); 1254 igb_setup_all_rx_resources(adapter); 1255 } 1256 1257 igb_assign_vector(adapter->q_vector[0], 0); 1258 1259 if (adapter->flags & IGB_FLAG_HAS_MSI) { 1260 err = request_irq(pdev->irq, igb_intr_msi, 0, 1261 netdev->name, adapter); 1262 if (!err) 1263 goto request_done; 1264 1265 /* fall back to legacy interrupts */ 1266 igb_reset_interrupt_capability(adapter); 1267 adapter->flags &= ~IGB_FLAG_HAS_MSI; 1268 } 1269 1270 err = request_irq(pdev->irq, igb_intr, IRQF_SHARED, 1271 netdev->name, adapter); 1272 1273 if (err) 1274 dev_err(&pdev->dev, "Error %d getting interrupt\n", 1275 err); 1276 1277request_done: 1278 return err; 1279} 1280 1281static void igb_free_irq(struct igb_adapter *adapter) 1282{ 1283 if (adapter->msix_entries) { 1284 int vector = 0, i; 1285 1286 free_irq(adapter->msix_entries[vector++].vector, adapter); 1287 1288 for (i = 0; i < adapter->num_q_vectors; i++) 1289 free_irq(adapter->msix_entries[vector++].vector, 1290 adapter->q_vector[i]); 1291 } else { 1292 free_irq(adapter->pdev->irq, adapter); 1293 } 1294} 1295 1296/** 1297 * igb_irq_disable - Mask off interrupt generation on the NIC 1298 * @adapter: board private structure 1299 **/ 1300static void igb_irq_disable(struct igb_adapter *adapter) 1301{ 1302 struct e1000_hw *hw = &adapter->hw; 1303 1304 /* 1305 * we need to be careful when disabling interrupts. The VFs are also 1306 * mapped into these registers and so clearing the bits can cause 1307 * issues on the VF drivers so we only need to clear what we set 1308 */ 1309 if (adapter->msix_entries) { 1310 u32 regval = rd32(E1000_EIAM); 1311 wr32(E1000_EIAM, regval & ~adapter->eims_enable_mask); 1312 wr32(E1000_EIMC, adapter->eims_enable_mask); 1313 regval = rd32(E1000_EIAC); 1314 wr32(E1000_EIAC, regval & ~adapter->eims_enable_mask); 1315 } 1316 1317 wr32(E1000_IAM, 0); 1318 wr32(E1000_IMC, ~0); 1319 wrfl(); 1320 if (adapter->msix_entries) { 1321 int i; 1322 for (i = 0; i < adapter->num_q_vectors; i++) 1323 synchronize_irq(adapter->msix_entries[i].vector); 1324 } else { 1325 synchronize_irq(adapter->pdev->irq); 1326 } 1327} 1328 1329/** 1330 * igb_irq_enable - Enable default interrupt generation settings 1331 * @adapter: board private structure 1332 **/ 1333static void igb_irq_enable(struct igb_adapter *adapter) 1334{ 1335 struct e1000_hw *hw = &adapter->hw; 1336 1337 if (adapter->msix_entries) { 1338 u32 ims = E1000_IMS_LSC | E1000_IMS_DOUTSYNC | E1000_IMS_DRSTA; 1339 u32 regval = rd32(E1000_EIAC); 1340 wr32(E1000_EIAC, regval | adapter->eims_enable_mask); 1341 regval = rd32(E1000_EIAM); 1342 wr32(E1000_EIAM, regval | adapter->eims_enable_mask); 1343 wr32(E1000_EIMS, adapter->eims_enable_mask); 1344 if (adapter->vfs_allocated_count) { 1345 wr32(E1000_MBVFIMR, 0xFF); 1346 ims |= E1000_IMS_VMMB; 1347 } 1348 wr32(E1000_IMS, ims); 1349 } else { 1350 wr32(E1000_IMS, IMS_ENABLE_MASK | 1351 E1000_IMS_DRSTA); 1352 wr32(E1000_IAM, IMS_ENABLE_MASK | 1353 E1000_IMS_DRSTA); 1354 } 1355} 1356 1357static void igb_update_mng_vlan(struct igb_adapter *adapter) 1358{ 1359 struct e1000_hw *hw = &adapter->hw; 1360 u16 vid = adapter->hw.mng_cookie.vlan_id; 1361 u16 old_vid = adapter->mng_vlan_id; 1362 1363 if (hw->mng_cookie.status & E1000_MNG_DHCP_COOKIE_STATUS_VLAN) { 1364 /* add VID to filter table */ 1365 igb_vfta_set(hw, vid, true); 1366 adapter->mng_vlan_id = vid; 1367 } else { 1368 adapter->mng_vlan_id = IGB_MNG_VLAN_NONE; 1369 } 1370 1371 if ((old_vid != (u16)IGB_MNG_VLAN_NONE) && 1372 (vid != old_vid) && 1373 !test_bit(old_vid, adapter->active_vlans)) { 1374 /* remove VID from filter table */ 1375 igb_vfta_set(hw, old_vid, false); 1376 } 1377} 1378 1379/** 1380 * igb_release_hw_control - release control of the h/w to f/w 1381 * @adapter: address of board private structure 1382 * 1383 * igb_release_hw_control resets CTRL_EXT:DRV_LOAD bit. 1384 * For ASF and Pass Through versions of f/w this means that the 1385 * driver is no longer loaded. 1386 * 1387 **/ 1388static void igb_release_hw_control(struct igb_adapter *adapter) 1389{ 1390 struct e1000_hw *hw = &adapter->hw; 1391 u32 ctrl_ext; 1392 1393 /* Let firmware take over control of h/w */ 1394 ctrl_ext = rd32(E1000_CTRL_EXT); 1395 wr32(E1000_CTRL_EXT, 1396 ctrl_ext & ~E1000_CTRL_EXT_DRV_LOAD); 1397} 1398 1399/** 1400 * igb_get_hw_control - get control of the h/w from f/w 1401 * @adapter: address of board private structure 1402 * 1403 * igb_get_hw_control sets CTRL_EXT:DRV_LOAD bit. 1404 * For ASF and Pass Through versions of f/w this means that 1405 * the driver is loaded. 1406 * 1407 **/ 1408static void igb_get_hw_control(struct igb_adapter *adapter) 1409{ 1410 struct e1000_hw *hw = &adapter->hw; 1411 u32 ctrl_ext; 1412 1413 /* Let firmware know the driver has taken over */ 1414 ctrl_ext = rd32(E1000_CTRL_EXT); 1415 wr32(E1000_CTRL_EXT, 1416 ctrl_ext | E1000_CTRL_EXT_DRV_LOAD); 1417} 1418 1419/** 1420 * igb_configure - configure the hardware for RX and TX 1421 * @adapter: private board structure 1422 **/ 1423static void igb_configure(struct igb_adapter *adapter) 1424{ 1425 struct net_device *netdev = adapter->netdev; 1426 int i; 1427 1428 igb_get_hw_control(adapter); 1429 igb_set_rx_mode(netdev); 1430 1431 igb_restore_vlan(adapter); 1432 1433 igb_setup_tctl(adapter); 1434 igb_setup_mrqc(adapter); 1435 igb_setup_rctl(adapter); 1436 1437 igb_configure_tx(adapter); 1438 igb_configure_rx(adapter); 1439 1440 igb_rx_fifo_flush_82575(&adapter->hw); 1441 1442 /* call igb_desc_unused which always leaves 1443 * at least 1 descriptor unused to make sure 1444 * next_to_use != next_to_clean */ 1445 for (i = 0; i < adapter->num_rx_queues; i++) { 1446 struct igb_ring *ring = adapter->rx_ring[i]; 1447 igb_alloc_rx_buffers(ring, igb_desc_unused(ring)); 1448 } 1449} 1450 1451/** 1452 * igb_power_up_link - Power up the phy/serdes link 1453 * @adapter: address of board private structure 1454 **/ 1455void igb_power_up_link(struct igb_adapter *adapter) 1456{ 1457 igb_reset_phy(&adapter->hw); 1458 1459 if (adapter->hw.phy.media_type == e1000_media_type_copper) 1460 igb_power_up_phy_copper(&adapter->hw); 1461 else 1462 igb_power_up_serdes_link_82575(&adapter->hw); 1463} 1464 1465/** 1466 * igb_power_down_link - Power down the phy/serdes link 1467 * @adapter: address of board private structure 1468 */ 1469static void igb_power_down_link(struct igb_adapter *adapter) 1470{ 1471 if (adapter->hw.phy.media_type == e1000_media_type_copper) 1472 igb_power_down_phy_copper_82575(&adapter->hw); 1473 else 1474 igb_shutdown_serdes_link_82575(&adapter->hw); 1475} 1476 1477/** 1478 * igb_up - Open the interface and prepare it to handle traffic 1479 * @adapter: board private structure 1480 **/ 1481int igb_up(struct igb_adapter *adapter) 1482{ 1483 struct e1000_hw *hw = &adapter->hw; 1484 int i; 1485 1486 /* hardware has been reset, we need to reload some things */ 1487 igb_configure(adapter); 1488 1489 clear_bit(__IGB_DOWN, &adapter->state); 1490 1491 for (i = 0; i < adapter->num_q_vectors; i++) 1492 napi_enable(&(adapter->q_vector[i]->napi)); 1493 1494 if (adapter->msix_entries) 1495 igb_configure_msix(adapter); 1496 else 1497 igb_assign_vector(adapter->q_vector[0], 0); 1498 1499 /* Clear any pending interrupts. */ 1500 rd32(E1000_ICR); 1501 igb_irq_enable(adapter); 1502 1503 /* notify VFs that reset has been completed */ 1504 if (adapter->vfs_allocated_count) { 1505 u32 reg_data = rd32(E1000_CTRL_EXT); 1506 reg_data |= E1000_CTRL_EXT_PFRSTD; 1507 wr32(E1000_CTRL_EXT, reg_data); 1508 } 1509 1510 netif_tx_start_all_queues(adapter->netdev); 1511 1512 /* start the watchdog. */ 1513 hw->mac.get_link_status = 1; 1514 schedule_work(&adapter->watchdog_task); 1515 1516 return 0; 1517} 1518 1519void igb_down(struct igb_adapter *adapter) 1520{ 1521 struct net_device *netdev = adapter->netdev; 1522 struct e1000_hw *hw = &adapter->hw; 1523 u32 tctl, rctl; 1524 int i; 1525 1526 /* signal that we're down so the interrupt handler does not 1527 * reschedule our watchdog timer */ 1528 set_bit(__IGB_DOWN, &adapter->state); 1529 1530 /* disable receives in the hardware */ 1531 rctl = rd32(E1000_RCTL); 1532 wr32(E1000_RCTL, rctl & ~E1000_RCTL_EN); 1533 /* flush and sleep below */ 1534 1535 netif_tx_stop_all_queues(netdev); 1536 1537 /* disable transmits in the hardware */ 1538 tctl = rd32(E1000_TCTL); 1539 tctl &= ~E1000_TCTL_EN; 1540 wr32(E1000_TCTL, tctl); 1541 /* flush both disables and wait for them to finish */ 1542 wrfl(); 1543 msleep(10); 1544 1545 for (i = 0; i < adapter->num_q_vectors; i++) 1546 napi_disable(&(adapter->q_vector[i]->napi)); 1547 1548 igb_irq_disable(adapter); 1549 1550 del_timer_sync(&adapter->watchdog_timer); 1551 del_timer_sync(&adapter->phy_info_timer); 1552 1553 netif_carrier_off(netdev); 1554 1555 /* record the stats before reset*/ 1556 spin_lock(&adapter->stats64_lock); 1557 igb_update_stats(adapter, &adapter->stats64); 1558 spin_unlock(&adapter->stats64_lock); 1559 1560 adapter->link_speed = 0; 1561 adapter->link_duplex = 0; 1562 1563 if (!pci_channel_offline(adapter->pdev)) 1564 igb_reset(adapter); 1565 igb_clean_all_tx_rings(adapter); 1566 igb_clean_all_rx_rings(adapter); 1567#ifdef CONFIG_IGB_DCA 1568 1569 /* since we reset the hardware DCA settings were cleared */ 1570 igb_setup_dca(adapter); 1571#endif 1572} 1573 1574void igb_reinit_locked(struct igb_adapter *adapter) 1575{ 1576 WARN_ON(in_interrupt()); 1577 while (test_and_set_bit(__IGB_RESETTING, &adapter->state)) 1578 msleep(1); 1579 igb_down(adapter); 1580 igb_up(adapter); 1581 clear_bit(__IGB_RESETTING, &adapter->state); 1582} 1583 1584void igb_reset(struct igb_adapter *adapter) 1585{ 1586 struct pci_dev *pdev = adapter->pdev; 1587 struct e1000_hw *hw = &adapter->hw; 1588 struct e1000_mac_info *mac = &hw->mac; 1589 struct e1000_fc_info *fc = &hw->fc; 1590 u32 pba = 0, tx_space, min_tx_space, min_rx_space; 1591 u16 hwm; 1592 1593 /* Repartition Pba for greater than 9k mtu 1594 * To take effect CTRL.RST is required. 1595 */ 1596 switch (mac->type) { 1597 case e1000_i350: 1598 case e1000_82580: 1599 pba = rd32(E1000_RXPBS); 1600 pba = igb_rxpbs_adjust_82580(pba); 1601 break; 1602 case e1000_82576: 1603 pba = rd32(E1000_RXPBS); 1604 pba &= E1000_RXPBS_SIZE_MASK_82576; 1605 break; 1606 case e1000_82575: 1607 case e1000_i210: 1608 case e1000_i211: 1609 default: 1610 pba = E1000_PBA_34K; 1611 break; 1612 } 1613 1614 if ((adapter->max_frame_size > ETH_FRAME_LEN + ETH_FCS_LEN) && 1615 (mac->type < e1000_82576)) { 1616 /* adjust PBA for jumbo frames */ 1617 wr32(E1000_PBA, pba); 1618 1619 /* To maintain wire speed transmits, the Tx FIFO should be 1620 * large enough to accommodate two full transmit packets, 1621 * rounded up to the next 1KB and expressed in KB. Likewise, 1622 * the Rx FIFO should be large enough to accommodate at least 1623 * one full receive packet and is similarly rounded up and 1624 * expressed in KB. */ 1625 pba = rd32(E1000_PBA); 1626 /* upper 16 bits has Tx packet buffer allocation size in KB */ 1627 tx_space = pba >> 16; 1628 /* lower 16 bits has Rx packet buffer allocation size in KB */ 1629 pba &= 0xffff; 1630 /* the tx fifo also stores 16 bytes of information about the tx 1631 * but don't include ethernet FCS because hardware appends it */ 1632 min_tx_space = (adapter->max_frame_size + 1633 sizeof(union e1000_adv_tx_desc) - 1634 ETH_FCS_LEN) * 2; 1635 min_tx_space = ALIGN(min_tx_space, 1024); 1636 min_tx_space >>= 10; 1637 /* software strips receive CRC, so leave room for it */ 1638 min_rx_space = adapter->max_frame_size; 1639 min_rx_space = ALIGN(min_rx_space, 1024); 1640 min_rx_space >>= 10; 1641 1642 /* If current Tx allocation is less than the min Tx FIFO size, 1643 * and the min Tx FIFO size is less than the current Rx FIFO 1644 * allocation, take space away from current Rx allocation */ 1645 if (tx_space < min_tx_space && 1646 ((min_tx_space - tx_space) < pba)) { 1647 pba = pba - (min_tx_space - tx_space); 1648 1649 /* if short on rx space, rx wins and must trump tx 1650 * adjustment */ 1651 if (pba < min_rx_space) 1652 pba = min_rx_space; 1653 } 1654 wr32(E1000_PBA, pba); 1655 } 1656 1657 /* flow control settings */ 1658 /* The high water mark must be low enough to fit one full frame 1659 * (or the size used for early receive) above it in the Rx FIFO. 1660 * Set it to the lower of: 1661 * - 90% of the Rx FIFO size, or 1662 * - the full Rx FIFO size minus one full frame */ 1663 hwm = min(((pba << 10) * 9 / 10), 1664 ((pba << 10) - 2 * adapter->max_frame_size)); 1665 1666 fc->high_water = hwm & 0xFFF0; /* 16-byte granularity */ 1667 fc->low_water = fc->high_water - 16; 1668 fc->pause_time = 0xFFFF; 1669 fc->send_xon = 1; 1670 fc->current_mode = fc->requested_mode; 1671 1672 /* disable receive for all VFs and wait one second */ 1673 if (adapter->vfs_allocated_count) { 1674 int i; 1675 for (i = 0 ; i < adapter->vfs_allocated_count; i++) 1676 adapter->vf_data[i].flags &= IGB_VF_FLAG_PF_SET_MAC; 1677 1678 /* ping all the active vfs to let them know we are going down */ 1679 igb_ping_all_vfs(adapter); 1680 1681 /* disable transmits and receives */ 1682 wr32(E1000_VFRE, 0); 1683 wr32(E1000_VFTE, 0); 1684 } 1685 1686 /* Allow time for pending master requests to run */ 1687 hw->mac.ops.reset_hw(hw); 1688 wr32(E1000_WUC, 0); 1689 1690 if (hw->mac.ops.init_hw(hw)) 1691 dev_err(&pdev->dev, "Hardware Error\n"); 1692 1693 /* 1694 * Flow control settings reset on hardware reset, so guarantee flow 1695 * control is off when forcing speed. 1696 */ 1697 if (!hw->mac.autoneg) 1698 igb_force_mac_fc(hw); 1699 1700 igb_init_dmac(adapter, pba); 1701 if (!netif_running(adapter->netdev)) 1702 igb_power_down_link(adapter); 1703 1704 igb_update_mng_vlan(adapter); 1705 1706 /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */ 1707 wr32(E1000_VET, ETHERNET_IEEE_VLAN_TYPE); 1708 1709#ifdef CONFIG_IGB_PTP 1710 /* Re-enable PTP, where applicable. */ 1711 igb_ptp_reset(adapter); 1712#endif /* CONFIG_IGB_PTP */ 1713 1714 igb_get_phy_info(hw); 1715} 1716 1717static netdev_features_t igb_fix_features(struct net_device *netdev, 1718 netdev_features_t features) 1719{ 1720 /* 1721 * Since there is no support for separate rx/tx vlan accel 1722 * enable/disable make sure tx flag is always in same state as rx. 1723 */ 1724 if (features & NETIF_F_HW_VLAN_RX) 1725 features |= NETIF_F_HW_VLAN_TX; 1726 else 1727 features &= ~NETIF_F_HW_VLAN_TX; 1728 1729 return features; 1730} 1731 1732static int igb_set_features(struct net_device *netdev, 1733 netdev_features_t features) 1734{ 1735 netdev_features_t changed = netdev->features ^ features; 1736 struct igb_adapter *adapter = netdev_priv(netdev); 1737 1738 if (changed & NETIF_F_HW_VLAN_RX) 1739 igb_vlan_mode(netdev, features); 1740 1741 if (!(changed & NETIF_F_RXALL)) 1742 return 0; 1743 1744 netdev->features = features; 1745 1746 if (netif_running(netdev)) 1747 igb_reinit_locked(adapter); 1748 else 1749 igb_reset(adapter); 1750 1751 return 0; 1752} 1753 1754static const struct net_device_ops igb_netdev_ops = { 1755 .ndo_open = igb_open, 1756 .ndo_stop = igb_close, 1757 .ndo_start_xmit = igb_xmit_frame, 1758 .ndo_get_stats64 = igb_get_stats64, 1759 .ndo_set_rx_mode = igb_set_rx_mode, 1760 .ndo_set_mac_address = igb_set_mac, 1761 .ndo_change_mtu = igb_change_mtu, 1762 .ndo_do_ioctl = igb_ioctl, 1763 .ndo_tx_timeout = igb_tx_timeout, 1764 .ndo_validate_addr = eth_validate_addr, 1765 .ndo_vlan_rx_add_vid = igb_vlan_rx_add_vid, 1766 .ndo_vlan_rx_kill_vid = igb_vlan_rx_kill_vid, 1767 .ndo_set_vf_mac = igb_ndo_set_vf_mac, 1768 .ndo_set_vf_vlan = igb_ndo_set_vf_vlan, 1769 .ndo_set_vf_tx_rate = igb_ndo_set_vf_bw, 1770 .ndo_get_vf_config = igb_ndo_get_vf_config, 1771#ifdef CONFIG_NET_POLL_CONTROLLER 1772 .ndo_poll_controller = igb_netpoll, 1773#endif 1774 .ndo_fix_features = igb_fix_features, 1775 .ndo_set_features = igb_set_features, 1776}; 1777 1778/** 1779 * igb_set_fw_version - Configure version string for ethtool 1780 * @adapter: adapter struct 1781 * 1782 **/ 1783void igb_set_fw_version(struct igb_adapter *adapter) 1784{ 1785 struct e1000_hw *hw = &adapter->hw; 1786 u16 eeprom_verh, eeprom_verl, comb_verh, comb_verl, comb_offset; 1787 u16 major, build, patch, fw_version; 1788 u32 etrack_id; 1789 1790 hw->nvm.ops.read(hw, 5, 1, &fw_version); 1791 if (adapter->hw.mac.type != e1000_i211) { 1792 hw->nvm.ops.read(hw, NVM_ETRACK_WORD, 1, &eeprom_verh); 1793 hw->nvm.ops.read(hw, (NVM_ETRACK_WORD + 1), 1, &eeprom_verl); 1794 etrack_id = (eeprom_verh << IGB_ETRACK_SHIFT) | eeprom_verl; 1795 1796 /* combo image version needs to be found */ 1797 hw->nvm.ops.read(hw, NVM_COMB_VER_PTR, 1, &comb_offset); 1798 if ((comb_offset != 0x0) && 1799 (comb_offset != IGB_NVM_VER_INVALID)) { 1800 hw->nvm.ops.read(hw, (NVM_COMB_VER_OFF + comb_offset 1801 + 1), 1, &comb_verh); 1802 hw->nvm.ops.read(hw, (NVM_COMB_VER_OFF + comb_offset), 1803 1, &comb_verl); 1804 1805 /* Only display Option Rom if it exists and is valid */ 1806 if ((comb_verh && comb_verl) && 1807 ((comb_verh != IGB_NVM_VER_INVALID) && 1808 (comb_verl != IGB_NVM_VER_INVALID))) { 1809 major = comb_verl >> IGB_COMB_VER_SHFT; 1810 build = (comb_verl << IGB_COMB_VER_SHFT) | 1811 (comb_verh >> IGB_COMB_VER_SHFT); 1812 patch = comb_verh & IGB_COMB_VER_MASK; 1813 snprintf(adapter->fw_version, 1814 sizeof(adapter->fw_version), 1815 "%d.%d%d, 0x%08x, %d.%d.%d", 1816 (fw_version & IGB_MAJOR_MASK) >> 1817 IGB_MAJOR_SHIFT, 1818 (fw_version & IGB_MINOR_MASK) >> 1819 IGB_MINOR_SHIFT, 1820 (fw_version & IGB_BUILD_MASK), 1821 etrack_id, major, build, patch); 1822 goto out; 1823 } 1824 } 1825 snprintf(adapter->fw_version, sizeof(adapter->fw_version), 1826 "%d.%d%d, 0x%08x", 1827 (fw_version & IGB_MAJOR_MASK) >> IGB_MAJOR_SHIFT, 1828 (fw_version & IGB_MINOR_MASK) >> IGB_MINOR_SHIFT, 1829 (fw_version & IGB_BUILD_MASK), etrack_id); 1830 } else { 1831 snprintf(adapter->fw_version, sizeof(adapter->fw_version), 1832 "%d.%d%d", 1833 (fw_version & IGB_MAJOR_MASK) >> IGB_MAJOR_SHIFT, 1834 (fw_version & IGB_MINOR_MASK) >> IGB_MINOR_SHIFT, 1835 (fw_version & IGB_BUILD_MASK)); 1836 } 1837out: 1838 return; 1839} 1840 1841/** 1842 * igb_probe - Device Initialization Routine 1843 * @pdev: PCI device information struct 1844 * @ent: entry in igb_pci_tbl 1845 * 1846 * Returns 0 on success, negative on failure 1847 * 1848 * igb_probe initializes an adapter identified by a pci_dev structure. 1849 * The OS initialization, configuring of the adapter private structure, 1850 * and a hardware reset occur. 1851 **/ 1852static int __devinit igb_probe(struct pci_dev *pdev, 1853 const struct pci_device_id *ent) 1854{ 1855 struct net_device *netdev; 1856 struct igb_adapter *adapter; 1857 struct e1000_hw *hw; 1858 u16 eeprom_data = 0; 1859 s32 ret_val; 1860 static int global_quad_port_a; /* global quad port a indication */ 1861 const struct e1000_info *ei = igb_info_tbl[ent->driver_data]; 1862 unsigned long mmio_start, mmio_len; 1863 int err, pci_using_dac; 1864 u16 eeprom_apme_mask = IGB_EEPROM_APME; 1865 u8 part_str[E1000_PBANUM_LENGTH]; 1866 1867 /* Catch broken hardware that put the wrong VF device ID in 1868 * the PCIe SR-IOV capability. 1869 */ 1870 if (pdev->is_virtfn) { 1871 WARN(1, KERN_ERR "%s (%hx:%hx) should not be a VF!\n", 1872 pci_name(pdev), pdev->vendor, pdev->device); 1873 return -EINVAL; 1874 } 1875 1876 err = pci_enable_device_mem(pdev); 1877 if (err) 1878 return err; 1879 1880 pci_using_dac = 0; 1881 err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(64)); 1882 if (!err) { 1883 err = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64)); 1884 if (!err) 1885 pci_using_dac = 1; 1886 } else { 1887 err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32)); 1888 if (err) { 1889 err = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32)); 1890 if (err) { 1891 dev_err(&pdev->dev, "No usable DMA " 1892 "configuration, aborting\n"); 1893 goto err_dma; 1894 } 1895 } 1896 } 1897 1898 err = pci_request_selected_regions(pdev, pci_select_bars(pdev, 1899 IORESOURCE_MEM), 1900 igb_driver_name); 1901 if (err) 1902 goto err_pci_reg; 1903 1904 pci_enable_pcie_error_reporting(pdev); 1905 1906 pci_set_master(pdev); 1907 pci_save_state(pdev); 1908 1909 err = -ENOMEM; 1910 netdev = alloc_etherdev_mq(sizeof(struct igb_adapter), 1911 IGB_MAX_TX_QUEUES); 1912 if (!netdev) 1913 goto err_alloc_etherdev; 1914 1915 SET_NETDEV_DEV(netdev, &pdev->dev); 1916 1917 pci_set_drvdata(pdev, netdev); 1918 adapter = netdev_priv(netdev); 1919 adapter->netdev = netdev; 1920 adapter->pdev = pdev; 1921 hw = &adapter->hw; 1922 hw->back = adapter; 1923 adapter->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE); 1924 1925 mmio_start = pci_resource_start(pdev, 0); 1926 mmio_len = pci_resource_len(pdev, 0); 1927 1928 err = -EIO; 1929 hw->hw_addr = ioremap(mmio_start, mmio_len); 1930 if (!hw->hw_addr) 1931 goto err_ioremap; 1932 1933 netdev->netdev_ops = &igb_netdev_ops; 1934 igb_set_ethtool_ops(netdev); 1935 netdev->watchdog_timeo = 5 * HZ; 1936 1937 strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1); 1938 1939 netdev->mem_start = mmio_start; 1940 netdev->mem_end = mmio_start + mmio_len; 1941 1942 /* PCI config space info */ 1943 hw->vendor_id = pdev->vendor; 1944 hw->device_id = pdev->device; 1945 hw->revision_id = pdev->revision; 1946 hw->subsystem_vendor_id = pdev->subsystem_vendor; 1947 hw->subsystem_device_id = pdev->subsystem_device; 1948 1949 /* Copy the default MAC, PHY and NVM function pointers */ 1950 memcpy(&hw->mac.ops, ei->mac_ops, sizeof(hw->mac.ops)); 1951 memcpy(&hw->phy.ops, ei->phy_ops, sizeof(hw->phy.ops)); 1952 memcpy(&hw->nvm.ops, ei->nvm_ops, sizeof(hw->nvm.ops)); 1953 /* Initialize skew-specific constants */ 1954 err = ei->get_invariants(hw); 1955 if (err) 1956 goto err_sw_init; 1957 1958 /* setup the private structure */ 1959 err = igb_sw_init(adapter); 1960 if (err) 1961 goto err_sw_init; 1962 1963 igb_get_bus_info_pcie(hw); 1964 1965 hw->phy.autoneg_wait_to_complete = false; 1966 1967 /* Copper options */ 1968 if (hw->phy.media_type == e1000_media_type_copper) { 1969 hw->phy.mdix = AUTO_ALL_MODES; 1970 hw->phy.disable_polarity_correction = false; 1971 hw->phy.ms_type = e1000_ms_hw_default; 1972 } 1973 1974 if (igb_check_reset_block(hw)) 1975 dev_info(&pdev->dev, 1976 "PHY reset is blocked due to SOL/IDER session.\n"); 1977 1978 /* 1979 * features is initialized to 0 in allocation, it might have bits 1980 * set by igb_sw_init so we should use an or instead of an 1981 * assignment. 1982 */ 1983 netdev->features |= NETIF_F_SG | 1984 NETIF_F_IP_CSUM | 1985 NETIF_F_IPV6_CSUM | 1986 NETIF_F_TSO | 1987 NETIF_F_TSO6 | 1988 NETIF_F_RXHASH | 1989 NETIF_F_RXCSUM | 1990 NETIF_F_HW_VLAN_RX | 1991 NETIF_F_HW_VLAN_TX; 1992 1993 /* copy netdev features into list of user selectable features */ 1994 netdev->hw_features |= netdev->features; 1995 netdev->hw_features |= NETIF_F_RXALL; 1996 1997 /* set this bit last since it cannot be part of hw_features */ 1998 netdev->features |= NETIF_F_HW_VLAN_FILTER; 1999 2000 netdev->vlan_features |= NETIF_F_TSO | 2001 NETIF_F_TSO6 | 2002 NETIF_F_IP_CSUM | 2003 NETIF_F_IPV6_CSUM | 2004 NETIF_F_SG; 2005 2006 netdev->priv_flags |= IFF_SUPP_NOFCS; 2007 2008 if (pci_using_dac) { 2009 netdev->features |= NETIF_F_HIGHDMA; 2010 netdev->vlan_features |= NETIF_F_HIGHDMA; 2011 } 2012 2013 if (hw->mac.type >= e1000_82576) { 2014 netdev->hw_features |= NETIF_F_SCTP_CSUM; 2015 netdev->features |= NETIF_F_SCTP_CSUM; 2016 } 2017 2018 netdev->priv_flags |= IFF_UNICAST_FLT; 2019 2020 adapter->en_mng_pt = igb_enable_mng_pass_thru(hw); 2021 2022 /* before reading the NVM, reset the controller to put the device in a 2023 * known good starting state */ 2024 hw->mac.ops.reset_hw(hw); 2025 2026 /* 2027 * make sure the NVM is good , i211 parts have special NVM that 2028 * doesn't contain a checksum 2029 */ 2030 if (hw->mac.type != e1000_i211) { 2031 if (hw->nvm.ops.validate(hw) < 0) { 2032 dev_err(&pdev->dev, "The NVM Checksum Is Not Valid\n"); 2033 err = -EIO; 2034 goto err_eeprom; 2035 } 2036 } 2037 2038 /* copy the MAC address out of the NVM */ 2039 if (hw->mac.ops.read_mac_addr(hw)) 2040 dev_err(&pdev->dev, "NVM Read Error\n"); 2041 2042 memcpy(netdev->dev_addr, hw->mac.addr, netdev->addr_len); 2043 memcpy(netdev->perm_addr, hw->mac.addr, netdev->addr_len); 2044 2045 if (!is_valid_ether_addr(netdev->perm_addr)) { 2046 dev_err(&pdev->dev, "Invalid MAC Address\n"); 2047 err = -EIO; 2048 goto err_eeprom; 2049 } 2050 2051 /* get firmware version for ethtool -i */ 2052 igb_set_fw_version(adapter); 2053 2054 setup_timer(&adapter->watchdog_timer, igb_watchdog, 2055 (unsigned long) adapter); 2056 setup_timer(&adapter->phy_info_timer, igb_update_phy_info, 2057 (unsigned long) adapter); 2058 2059 INIT_WORK(&adapter->reset_task, igb_reset_task); 2060 INIT_WORK(&adapter->watchdog_task, igb_watchdog_task); 2061 2062 /* Initialize link properties that are user-changeable */ 2063 adapter->fc_autoneg = true; 2064 hw->mac.autoneg = true; 2065 hw->phy.autoneg_advertised = 0x2f; 2066 2067 hw->fc.requested_mode = e1000_fc_default; 2068 hw->fc.current_mode = e1000_fc_default; 2069 2070 igb_validate_mdi_setting(hw); 2071 2072 /* Initial Wake on LAN setting If APM wake is enabled in the EEPROM, 2073 * enable the ACPI Magic Packet filter 2074 */ 2075 2076 if (hw->bus.func == 0) 2077 hw->nvm.ops.read(hw, NVM_INIT_CONTROL3_PORT_A, 1, &eeprom_data); 2078 else if (hw->mac.type >= e1000_82580) 2079 hw->nvm.ops.read(hw, NVM_INIT_CONTROL3_PORT_A + 2080 NVM_82580_LAN_FUNC_OFFSET(hw->bus.func), 1, 2081 &eeprom_data); 2082 else if (hw->bus.func == 1) 2083 hw->nvm.ops.read(hw, NVM_INIT_CONTROL3_PORT_B, 1, &eeprom_data); 2084 2085 if (eeprom_data & eeprom_apme_mask) 2086 adapter->eeprom_wol |= E1000_WUFC_MAG; 2087 2088 /* now that we have the eeprom settings, apply the special cases where 2089 * the eeprom may be wrong or the board simply won't support wake on 2090 * lan on a particular port */ 2091 switch (pdev->device) { 2092 case E1000_DEV_ID_82575GB_QUAD_COPPER: 2093 adapter->eeprom_wol = 0; 2094 break; 2095 case E1000_DEV_ID_82575EB_FIBER_SERDES: 2096 case E1000_DEV_ID_82576_FIBER: 2097 case E1000_DEV_ID_82576_SERDES: 2098 /* Wake events only supported on port A for dual fiber 2099 * regardless of eeprom setting */ 2100 if (rd32(E1000_STATUS) & E1000_STATUS_FUNC_1) 2101 adapter->eeprom_wol = 0; 2102 break; 2103 case E1000_DEV_ID_82576_QUAD_COPPER: 2104 case E1000_DEV_ID_82576_QUAD_COPPER_ET2: 2105 /* if quad port adapter, disable WoL on all but port A */ 2106 if (global_quad_port_a != 0) 2107 adapter->eeprom_wol = 0; 2108 else 2109 adapter->flags |= IGB_FLAG_QUAD_PORT_A; 2110 /* Reset for multiple quad port adapters */ 2111 if (++global_quad_port_a == 4) 2112 global_quad_port_a = 0; 2113 break; 2114 } 2115 2116 /* initialize the wol settings based on the eeprom settings */ 2117 adapter->wol = adapter->eeprom_wol; 2118 device_set_wakeup_enable(&adapter->pdev->dev, adapter->wol); 2119 2120 /* reset the hardware with the new settings */ 2121 igb_reset(adapter); 2122 2123 /* let the f/w know that the h/w is now under the control of the 2124 * driver. */ 2125 igb_get_hw_control(adapter); 2126 2127 strcpy(netdev->name, "eth%d"); 2128 err = register_netdev(netdev); 2129 if (err) 2130 goto err_register; 2131 2132 /* carrier off reporting is important to ethtool even BEFORE open */ 2133 netif_carrier_off(netdev); 2134 2135#ifdef CONFIG_IGB_DCA 2136 if (dca_add_requester(&pdev->dev) == 0) { 2137 adapter->flags |= IGB_FLAG_DCA_ENABLED; 2138 dev_info(&pdev->dev, "DCA enabled\n"); 2139 igb_setup_dca(adapter); 2140 } 2141 2142#endif 2143 2144#ifdef CONFIG_IGB_PTP 2145 /* do hw tstamp init after resetting */ 2146 igb_ptp_init(adapter); 2147#endif /* CONFIG_IGB_PTP */ 2148 2149 dev_info(&pdev->dev, "Intel(R) Gigabit Ethernet Network Connection\n"); 2150 /* print bus type/speed/width info */ 2151 dev_info(&pdev->dev, "%s: (PCIe:%s:%s) %pM\n", 2152 netdev->name, 2153 ((hw->bus.speed == e1000_bus_speed_2500) ? "2.5Gb/s" : 2154 (hw->bus.speed == e1000_bus_speed_5000) ? "5.0Gb/s" : 2155 "unknown"), 2156 ((hw->bus.width == e1000_bus_width_pcie_x4) ? "Width x4" : 2157 (hw->bus.width == e1000_bus_width_pcie_x2) ? "Width x2" : 2158 (hw->bus.width == e1000_bus_width_pcie_x1) ? "Width x1" : 2159 "unknown"), 2160 netdev->dev_addr); 2161 2162 ret_val = igb_read_part_string(hw, part_str, E1000_PBANUM_LENGTH); 2163 if (ret_val) 2164 strcpy(part_str, "Unknown"); 2165 dev_info(&pdev->dev, "%s: PBA No: %s\n", netdev->name, part_str); 2166 dev_info(&pdev->dev, 2167 "Using %s interrupts. %d rx queue(s), %d tx queue(s)\n", 2168 adapter->msix_entries ? "MSI-X" : 2169 (adapter->flags & IGB_FLAG_HAS_MSI) ? "MSI" : "legacy", 2170 adapter->num_rx_queues, adapter->num_tx_queues); 2171 switch (hw->mac.type) { 2172 case e1000_i350: 2173 case e1000_i210: 2174 case e1000_i211: 2175 igb_set_eee_i350(hw); 2176 break; 2177 default: 2178 break; 2179 } 2180 2181 pm_runtime_put_noidle(&pdev->dev); 2182 return 0; 2183 2184err_register: 2185 igb_release_hw_control(adapter); 2186err_eeprom: 2187 if (!igb_check_reset_block(hw)) 2188 igb_reset_phy(hw); 2189 2190 if (hw->flash_address) 2191 iounmap(hw->flash_address); 2192err_sw_init: 2193 igb_clear_interrupt_scheme(adapter); 2194 iounmap(hw->hw_addr); 2195err_ioremap: 2196 free_netdev(netdev); 2197err_alloc_etherdev: 2198 pci_release_selected_regions(pdev, 2199 pci_select_bars(pdev, IORESOURCE_MEM)); 2200err_pci_reg: 2201err_dma: 2202 pci_disable_device(pdev); 2203 return err; 2204} 2205 2206/** 2207 * igb_remove - Device Removal Routine 2208 * @pdev: PCI device information struct 2209 * 2210 * igb_remove is called by the PCI subsystem to alert the driver 2211 * that it should release a PCI device. The could be caused by a 2212 * Hot-Plug event, or because the driver is going to be removed from 2213 * memory. 2214 **/ 2215static void __devexit igb_remove(struct pci_dev *pdev) 2216{ 2217 struct net_device *netdev = pci_get_drvdata(pdev); 2218 struct igb_adapter *adapter = netdev_priv(netdev); 2219 struct e1000_hw *hw = &adapter->hw; 2220 2221 pm_runtime_get_noresume(&pdev->dev); 2222#ifdef CONFIG_IGB_PTP 2223 igb_ptp_stop(adapter); 2224#endif /* CONFIG_IGB_PTP */ 2225 2226 /* 2227 * The watchdog timer may be rescheduled, so explicitly 2228 * disable watchdog from being rescheduled. 2229 */ 2230 set_bit(__IGB_DOWN, &adapter->state); 2231 del_timer_sync(&adapter->watchdog_timer); 2232 del_timer_sync(&adapter->phy_info_timer); 2233 2234 cancel_work_sync(&adapter->reset_task); 2235 cancel_work_sync(&adapter->watchdog_task); 2236 2237#ifdef CONFIG_IGB_DCA 2238 if (adapter->flags & IGB_FLAG_DCA_ENABLED) { 2239 dev_info(&pdev->dev, "DCA disabled\n"); 2240 dca_remove_requester(&pdev->dev); 2241 adapter->flags &= ~IGB_FLAG_DCA_ENABLED; 2242 wr32(E1000_DCA_CTRL, E1000_DCA_CTRL_DCA_MODE_DISABLE); 2243 } 2244#endif 2245 2246 /* Release control of h/w to f/w. If f/w is AMT enabled, this 2247 * would have already happened in close and is redundant. */ 2248 igb_release_hw_control(adapter); 2249 2250 unregister_netdev(netdev); 2251 2252 igb_clear_interrupt_scheme(adapter); 2253 2254#ifdef CONFIG_PCI_IOV 2255 /* reclaim resources allocated to VFs */ 2256 if (adapter->vf_data) { 2257 /* disable iov and allow time for transactions to clear */ 2258 if (igb_vfs_are_assigned(adapter)) { 2259 dev_info(&pdev->dev, "Unloading driver while VFs are assigned - VFs will not be deallocated\n"); 2260 } else { 2261 pci_disable_sriov(pdev); 2262 msleep(500); 2263 } 2264 2265 kfree(adapter->vf_data); 2266 adapter->vf_data = NULL; 2267 wr32(E1000_IOVCTL, E1000_IOVCTL_REUSE_VFQ); 2268 wrfl(); 2269 msleep(100); 2270 dev_info(&pdev->dev, "IOV Disabled\n"); 2271 } 2272#endif 2273 2274 iounmap(hw->hw_addr); 2275 if (hw->flash_address) 2276 iounmap(hw->flash_address); 2277 pci_release_selected_regions(pdev, 2278 pci_select_bars(pdev, IORESOURCE_MEM)); 2279 2280 kfree(adapter->shadow_vfta); 2281 free_netdev(netdev); 2282 2283 pci_disable_pcie_error_reporting(pdev); 2284 2285 pci_disable_device(pdev); 2286} 2287 2288/** 2289 * igb_probe_vfs - Initialize vf data storage and add VFs to pci config space 2290 * @adapter: board private structure to initialize 2291 * 2292 * This function initializes the vf specific data storage and then attempts to 2293 * allocate the VFs. The reason for ordering it this way is because it is much 2294 * mor expensive time wise to disable SR-IOV than it is to allocate and free 2295 * the memory for the VFs. 2296 **/ 2297static void __devinit igb_probe_vfs(struct igb_adapter * adapter) 2298{ 2299#ifdef CONFIG_PCI_IOV 2300 struct pci_dev *pdev = adapter->pdev; 2301 struct e1000_hw *hw = &adapter->hw; 2302 int old_vfs = pci_num_vf(adapter->pdev); 2303 int i; 2304 2305 /* Virtualization features not supported on i210 family. */ 2306 if ((hw->mac.type == e1000_i210) || (hw->mac.type == e1000_i211)) 2307 return; 2308 2309 if (old_vfs) { 2310 dev_info(&pdev->dev, "%d pre-allocated VFs found - override " 2311 "max_vfs setting of %d\n", old_vfs, max_vfs); 2312 adapter->vfs_allocated_count = old_vfs; 2313 } 2314 2315 if (!adapter->vfs_allocated_count) 2316 return; 2317 2318 adapter->vf_data = kcalloc(adapter->vfs_allocated_count, 2319 sizeof(struct vf_data_storage), GFP_KERNEL); 2320 2321 /* if allocation failed then we do not support SR-IOV */ 2322 if (!adapter->vf_data) { 2323 adapter->vfs_allocated_count = 0; 2324 dev_err(&pdev->dev, "Unable to allocate memory for VF " 2325 "Data Storage\n"); 2326 goto out; 2327 } 2328 2329 if (!old_vfs) { 2330 if (pci_enable_sriov(pdev, adapter->vfs_allocated_count)) 2331 goto err_out; 2332 } 2333 dev_info(&pdev->dev, "%d VFs allocated\n", 2334 adapter->vfs_allocated_count); 2335 for (i = 0; i < adapter->vfs_allocated_count; i++) 2336 igb_vf_configure(adapter, i); 2337 2338 /* DMA Coalescing is not supported in IOV mode. */ 2339 adapter->flags &= ~IGB_FLAG_DMAC; 2340 goto out; 2341err_out: 2342 kfree(adapter->vf_data); 2343 adapter->vf_data = NULL; 2344 adapter->vfs_allocated_count = 0; 2345out: 2346 return; 2347#endif /* CONFIG_PCI_IOV */ 2348} 2349 2350/** 2351 * igb_sw_init - Initialize general software structures (struct igb_adapter) 2352 * @adapter: board private structure to initialize 2353 * 2354 * igb_sw_init initializes the Adapter private data structure. 2355 * Fields are initialized based on PCI device information and 2356 * OS network device settings (MTU size). 2357 **/ 2358static int __devinit igb_sw_init(struct igb_adapter *adapter) 2359{ 2360 struct e1000_hw *hw = &adapter->hw; 2361 struct net_device *netdev = adapter->netdev; 2362 struct pci_dev *pdev = adapter->pdev; 2363 u32 max_rss_queues; 2364 2365 pci_read_config_word(pdev, PCI_COMMAND, &hw->bus.pci_cmd_word); 2366 2367 /* set default ring sizes */ 2368 adapter->tx_ring_count = IGB_DEFAULT_TXD; 2369 adapter->rx_ring_count = IGB_DEFAULT_RXD; 2370 2371 /* set default ITR values */ 2372 adapter->rx_itr_setting = IGB_DEFAULT_ITR; 2373 adapter->tx_itr_setting = IGB_DEFAULT_ITR; 2374 2375 /* set default work limits */ 2376 adapter->tx_work_limit = IGB_DEFAULT_TX_WORK; 2377 2378 adapter->max_frame_size = netdev->mtu + ETH_HLEN + ETH_FCS_LEN + 2379 VLAN_HLEN; 2380 adapter->min_frame_size = ETH_ZLEN + ETH_FCS_LEN; 2381 2382 spin_lock_init(&adapter->stats64_lock); 2383#ifdef CONFIG_PCI_IOV 2384 switch (hw->mac.type) { 2385 case e1000_82576: 2386 case e1000_i350: 2387 if (max_vfs > 7) { 2388 dev_warn(&pdev->dev, 2389 "Maximum of 7 VFs per PF, using max\n"); 2390 adapter->vfs_allocated_count = 7; 2391 } else 2392 adapter->vfs_allocated_count = max_vfs; 2393 break; 2394 default: 2395 break; 2396 } 2397#endif /* CONFIG_PCI_IOV */ 2398 2399 /* Determine the maximum number of RSS queues supported. */ 2400 switch (hw->mac.type) { 2401 case e1000_i211: 2402 max_rss_queues = IGB_MAX_RX_QUEUES_I211; 2403 break; 2404 case e1000_82575: 2405 case e1000_i210: 2406 max_rss_queues = IGB_MAX_RX_QUEUES_82575; 2407 break; 2408 case e1000_i350: 2409 /* I350 cannot do RSS and SR-IOV at the same time */ 2410 if (!!adapter->vfs_allocated_count) { 2411 max_rss_queues = 1; 2412 break; 2413 } 2414 /* fall through */ 2415 case e1000_82576: 2416 if (!!adapter->vfs_allocated_count) { 2417 max_rss_queues = 2; 2418 break; 2419 } 2420 /* fall through */ 2421 case e1000_82580: 2422 default: 2423 max_rss_queues = IGB_MAX_RX_QUEUES; 2424 break; 2425 } 2426 2427 adapter->rss_queues = min_t(u32, max_rss_queues, num_online_cpus()); 2428 2429 /* Determine if we need to pair queues. */ 2430 switch (hw->mac.type) { 2431 case e1000_82575: 2432 case e1000_i211: 2433 /* Device supports enough interrupts without queue pairing. */ 2434 break; 2435 case e1000_82576: 2436 /* 2437 * If VFs are going to be allocated with RSS queues then we 2438 * should pair the queues in order to conserve interrupts due 2439 * to limited supply. 2440 */ 2441 if ((adapter->rss_queues > 1) && 2442 (adapter->vfs_allocated_count > 6)) 2443 adapter->flags |= IGB_FLAG_QUEUE_PAIRS; 2444 /* fall through */ 2445 case e1000_82580: 2446 case e1000_i350: 2447 case e1000_i210: 2448 default: 2449 /* 2450 * If rss_queues > half of max_rss_queues, pair the queues in 2451 * order to conserve interrupts due to limited supply. 2452 */ 2453 if (adapter->rss_queues > (max_rss_queues / 2)) 2454 adapter->flags |= IGB_FLAG_QUEUE_PAIRS; 2455 break; 2456 } 2457 2458 /* Setup and initialize a copy of the hw vlan table array */ 2459 adapter->shadow_vfta = kzalloc(sizeof(u32) * 2460 E1000_VLAN_FILTER_TBL_SIZE, 2461 GFP_ATOMIC); 2462 2463 /* This call may decrease the number of queues */ 2464 if (igb_init_interrupt_scheme(adapter)) { 2465 dev_err(&pdev->dev, "Unable to allocate memory for queues\n"); 2466 return -ENOMEM; 2467 } 2468 2469 igb_probe_vfs(adapter); 2470 2471 /* Explicitly disable IRQ since the NIC can be in any state. */ 2472 igb_irq_disable(adapter); 2473 2474 if (hw->mac.type >= e1000_i350) 2475 adapter->flags &= ~IGB_FLAG_DMAC; 2476 2477 set_bit(__IGB_DOWN, &adapter->state); 2478 return 0; 2479} 2480 2481/** 2482 * igb_open - Called when a network interface is made active 2483 * @netdev: network interface device structure 2484 * 2485 * Returns 0 on success, negative value on failure 2486 * 2487 * The open entry point is called when a network interface is made 2488 * active by the system (IFF_UP). At this point all resources needed 2489 * for transmit and receive operations are allocated, the interrupt 2490 * handler is registered with the OS, the watchdog timer is started, 2491 * and the stack is notified that the interface is ready. 2492 **/ 2493static int __igb_open(struct net_device *netdev, bool resuming) 2494{ 2495 struct igb_adapter *adapter = netdev_priv(netdev); 2496 struct e1000_hw *hw = &adapter->hw; 2497 struct pci_dev *pdev = adapter->pdev; 2498 int err; 2499 int i; 2500 2501 /* disallow open during test */ 2502 if (test_bit(__IGB_TESTING, &adapter->state)) { 2503 WARN_ON(resuming); 2504 return -EBUSY; 2505 } 2506 2507 if (!resuming) 2508 pm_runtime_get_sync(&pdev->dev); 2509 2510 netif_carrier_off(netdev); 2511 2512 /* allocate transmit descriptors */ 2513 err = igb_setup_all_tx_resources(adapter); 2514 if (err) 2515 goto err_setup_tx; 2516 2517 /* allocate receive descriptors */ 2518 err = igb_setup_all_rx_resources(adapter); 2519 if (err) 2520 goto err_setup_rx; 2521 2522 igb_power_up_link(adapter); 2523 2524 /* before we allocate an interrupt, we must be ready to handle it. 2525 * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt 2526 * as soon as we call pci_request_irq, so we have to setup our 2527 * clean_rx handler before we do so. */ 2528 igb_configure(adapter); 2529 2530 err = igb_request_irq(adapter); 2531 if (err) 2532 goto err_req_irq; 2533 2534 /* From here on the code is the same as igb_up() */ 2535 clear_bit(__IGB_DOWN, &adapter->state); 2536 2537 for (i = 0; i < adapter->num_q_vectors; i++) 2538 napi_enable(&(adapter->q_vector[i]->napi)); 2539 2540 /* Clear any pending interrupts. */ 2541 rd32(E1000_ICR); 2542 2543 igb_irq_enable(adapter); 2544 2545 /* notify VFs that reset has been completed */ 2546 if (adapter->vfs_allocated_count) { 2547 u32 reg_data = rd32(E1000_CTRL_EXT); 2548 reg_data |= E1000_CTRL_EXT_PFRSTD; 2549 wr32(E1000_CTRL_EXT, reg_data); 2550 } 2551 2552 netif_tx_start_all_queues(netdev); 2553 2554 if (!resuming) 2555 pm_runtime_put(&pdev->dev); 2556 2557 /* start the watchdog. */ 2558 hw->mac.get_link_status = 1; 2559 schedule_work(&adapter->watchdog_task); 2560 2561 return 0; 2562 2563err_req_irq: 2564 igb_release_hw_control(adapter); 2565 igb_power_down_link(adapter); 2566 igb_free_all_rx_resources(adapter); 2567err_setup_rx: 2568 igb_free_all_tx_resources(adapter); 2569err_setup_tx: 2570 igb_reset(adapter); 2571 if (!resuming) 2572 pm_runtime_put(&pdev->dev); 2573 2574 return err; 2575} 2576 2577static int igb_open(struct net_device *netdev) 2578{ 2579 return __igb_open(netdev, false); 2580} 2581 2582/** 2583 * igb_close - Disables a network interface 2584 * @netdev: network interface device structure 2585 * 2586 * Returns 0, this is not allowed to fail 2587 * 2588 * The close entry point is called when an interface is de-activated 2589 * by the OS. The hardware is still under the driver's control, but 2590 * needs to be disabled. A global MAC reset is issued to stop the 2591 * hardware, and all transmit and receive resources are freed. 2592 **/ 2593static int __igb_close(struct net_device *netdev, bool suspending) 2594{ 2595 struct igb_adapter *adapter = netdev_priv(netdev); 2596 struct pci_dev *pdev = adapter->pdev; 2597 2598 WARN_ON(test_bit(__IGB_RESETTING, &adapter->state)); 2599 2600 if (!suspending) 2601 pm_runtime_get_sync(&pdev->dev); 2602 2603 igb_down(adapter); 2604 igb_free_irq(adapter); 2605 2606 igb_free_all_tx_resources(adapter); 2607 igb_free_all_rx_resources(adapter); 2608 2609 if (!suspending) 2610 pm_runtime_put_sync(&pdev->dev); 2611 return 0; 2612} 2613 2614static int igb_close(struct net_device *netdev) 2615{ 2616 return __igb_close(netdev, false); 2617} 2618 2619/** 2620 * igb_setup_tx_resources - allocate Tx resources (Descriptors) 2621 * @tx_ring: tx descriptor ring (for a specific queue) to setup 2622 * 2623 * Return 0 on success, negative on failure 2624 **/ 2625int igb_setup_tx_resources(struct igb_ring *tx_ring) 2626{ 2627 struct device *dev = tx_ring->dev; 2628 int size; 2629 2630 size = sizeof(struct igb_tx_buffer) * tx_ring->count; 2631 2632 tx_ring->tx_buffer_info = vzalloc(size); 2633 if (!tx_ring->tx_buffer_info) 2634 goto err; 2635 2636 /* round up to nearest 4K */ 2637 tx_ring->size = tx_ring->count * sizeof(union e1000_adv_tx_desc); 2638 tx_ring->size = ALIGN(tx_ring->size, 4096); 2639 2640 tx_ring->desc = dma_alloc_coherent(dev, 2641 tx_ring->size, 2642 &tx_ring->dma, 2643 GFP_KERNEL); 2644 if (!tx_ring->desc) 2645 goto err; 2646 2647 tx_ring->next_to_use = 0; 2648 tx_ring->next_to_clean = 0; 2649 2650 return 0; 2651 2652err: 2653 vfree(tx_ring->tx_buffer_info); 2654 tx_ring->tx_buffer_info = NULL; 2655 dev_err(dev, "Unable to allocate memory for the Tx descriptor ring\n"); 2656 return -ENOMEM; 2657} 2658 2659/** 2660 * igb_setup_all_tx_resources - wrapper to allocate Tx resources 2661 * (Descriptors) for all queues 2662 * @adapter: board private structure 2663 * 2664 * Return 0 on success, negative on failure 2665 **/ 2666static int igb_setup_all_tx_resources(struct igb_adapter *adapter) 2667{ 2668 struct pci_dev *pdev = adapter->pdev; 2669 int i, err = 0; 2670 2671 for (i = 0; i < adapter->num_tx_queues; i++) { 2672 err = igb_setup_tx_resources(adapter->tx_ring[i]); 2673 if (err) { 2674 dev_err(&pdev->dev, 2675 "Allocation for Tx Queue %u failed\n", i); 2676 for (i--; i >= 0; i--) 2677 igb_free_tx_resources(adapter->tx_ring[i]); 2678 break; 2679 } 2680 } 2681 2682 return err; 2683} 2684 2685/** 2686 * igb_setup_tctl - configure the transmit control registers 2687 * @adapter: Board private structure 2688 **/ 2689void igb_setup_tctl(struct igb_adapter *adapter) 2690{ 2691 struct e1000_hw *hw = &adapter->hw; 2692 u32 tctl; 2693 2694 /* disable queue 0 which is enabled by default on 82575 and 82576 */ 2695 wr32(E1000_TXDCTL(0), 0); 2696 2697 /* Program the Transmit Control Register */ 2698 tctl = rd32(E1000_TCTL); 2699 tctl &= ~E1000_TCTL_CT; 2700 tctl |= E1000_TCTL_PSP | E1000_TCTL_RTLC | 2701 (E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT); 2702 2703 igb_config_collision_dist(hw); 2704 2705 /* Enable transmits */ 2706 tctl |= E1000_TCTL_EN; 2707 2708 wr32(E1000_TCTL, tctl); 2709} 2710 2711/** 2712 * igb_configure_tx_ring - Configure transmit ring after Reset 2713 * @adapter: board private structure 2714 * @ring: tx ring to configure 2715 * 2716 * Configure a transmit ring after a reset. 2717 **/ 2718void igb_configure_tx_ring(struct igb_adapter *adapter, 2719 struct igb_ring *ring) 2720{ 2721 struct e1000_hw *hw = &adapter->hw; 2722 u32 txdctl = 0; 2723 u64 tdba = ring->dma; 2724 int reg_idx = ring->reg_idx; 2725 2726 /* disable the queue */ 2727 wr32(E1000_TXDCTL(reg_idx), 0); 2728 wrfl(); 2729 mdelay(10); 2730 2731 wr32(E1000_TDLEN(reg_idx), 2732 ring->count * sizeof(union e1000_adv_tx_desc)); 2733 wr32(E1000_TDBAL(reg_idx), 2734 tdba & 0x00000000ffffffffULL); 2735 wr32(E1000_TDBAH(reg_idx), tdba >> 32); 2736 2737 ring->tail = hw->hw_addr + E1000_TDT(reg_idx); 2738 wr32(E1000_TDH(reg_idx), 0); 2739 writel(0, ring->tail); 2740 2741 txdctl |= IGB_TX_PTHRESH; 2742 txdctl |= IGB_TX_HTHRESH << 8; 2743 txdctl |= IGB_TX_WTHRESH << 16; 2744 2745 txdctl |= E1000_TXDCTL_QUEUE_ENABLE; 2746 wr32(E1000_TXDCTL(reg_idx), txdctl); 2747} 2748 2749/** 2750 * igb_configure_tx - Configure transmit Unit after Reset 2751 * @adapter: board private structure 2752 * 2753 * Configure the Tx unit of the MAC after a reset. 2754 **/ 2755static void igb_configure_tx(struct igb_adapter *adapter) 2756{ 2757 int i; 2758 2759 for (i = 0; i < adapter->num_tx_queues; i++) 2760 igb_configure_tx_ring(adapter, adapter->tx_ring[i]); 2761} 2762 2763/** 2764 * igb_setup_rx_resources - allocate Rx resources (Descriptors) 2765 * @rx_ring: rx descriptor ring (for a specific queue) to setup 2766 * 2767 * Returns 0 on success, negative on failure 2768 **/ 2769int igb_setup_rx_resources(struct igb_ring *rx_ring) 2770{ 2771 struct device *dev = rx_ring->dev; 2772 int size; 2773 2774 size = sizeof(struct igb_rx_buffer) * rx_ring->count; 2775 2776 rx_ring->rx_buffer_info = vzalloc(size); 2777 if (!rx_ring->rx_buffer_info) 2778 goto err; 2779 2780 2781 /* Round up to nearest 4K */ 2782 rx_ring->size = rx_ring->count * sizeof(union e1000_adv_rx_desc); 2783 rx_ring->size = ALIGN(rx_ring->size, 4096); 2784 2785 rx_ring->desc = dma_alloc_coherent(dev, 2786 rx_ring->size, 2787 &rx_ring->dma, 2788 GFP_KERNEL); 2789 if (!rx_ring->desc) 2790 goto err; 2791 2792 rx_ring->next_to_clean = 0; 2793 rx_ring->next_to_use = 0; 2794 2795 return 0; 2796 2797err: 2798 vfree(rx_ring->rx_buffer_info); 2799 rx_ring->rx_buffer_info = NULL; 2800 dev_err(dev, "Unable to allocate memory for the Rx descriptor ring\n"); 2801 return -ENOMEM; 2802} 2803 2804/** 2805 * igb_setup_all_rx_resources - wrapper to allocate Rx resources 2806 * (Descriptors) for all queues 2807 * @adapter: board private structure 2808 * 2809 * Return 0 on success, negative on failure 2810 **/ 2811static int igb_setup_all_rx_resources(struct igb_adapter *adapter) 2812{ 2813 struct pci_dev *pdev = adapter->pdev; 2814 int i, err = 0; 2815 2816 for (i = 0; i < adapter->num_rx_queues; i++) { 2817 err = igb_setup_rx_resources(adapter->rx_ring[i]); 2818 if (err) { 2819 dev_err(&pdev->dev, 2820 "Allocation for Rx Queue %u failed\n", i); 2821 for (i--; i >= 0; i--) 2822 igb_free_rx_resources(adapter->rx_ring[i]); 2823 break; 2824 } 2825 } 2826 2827 return err; 2828} 2829 2830/** 2831 * igb_setup_mrqc - configure the multiple receive queue control registers 2832 * @adapter: Board private structure 2833 **/ 2834static void igb_setup_mrqc(struct igb_adapter *adapter) 2835{ 2836 struct e1000_hw *hw = &adapter->hw; 2837 u32 mrqc, rxcsum; 2838 u32 j, num_rx_queues, shift = 0; 2839 static const u32 rsskey[10] = { 0xDA565A6D, 0xC20E5B25, 0x3D256741, 2840 0xB08FA343, 0xCB2BCAD0, 0xB4307BAE, 2841 0xA32DCB77, 0x0CF23080, 0x3BB7426A, 2842 0xFA01ACBE }; 2843 2844 /* Fill out hash function seeds */ 2845 for (j = 0; j < 10; j++) 2846 wr32(E1000_RSSRK(j), rsskey[j]); 2847 2848 num_rx_queues = adapter->rss_queues; 2849 2850 switch (hw->mac.type) { 2851 case e1000_82575: 2852 shift = 6; 2853 break; 2854 case e1000_82576: 2855 /* 82576 supports 2 RSS queues for SR-IOV */ 2856 if (adapter->vfs_allocated_count) { 2857 shift = 3; 2858 num_rx_queues = 2; 2859 } 2860 break; 2861 default: 2862 break; 2863 } 2864 2865 /* 2866 * Populate the indirection table 4 entries at a time. To do this 2867 * we are generating the results for n and n+2 and then interleaving 2868 * those with the results with n+1 and n+3. 2869 */ 2870 for (j = 0; j < 32; j++) { 2871 /* first pass generates n and n+2 */ 2872 u32 base = ((j * 0x00040004) + 0x00020000) * num_rx_queues; 2873 u32 reta = (base & 0x07800780) >> (7 - shift); 2874 2875 /* second pass generates n+1 and n+3 */ 2876 base += 0x00010001 * num_rx_queues; 2877 reta |= (base & 0x07800780) << (1 + shift); 2878 2879 wr32(E1000_RETA(j), reta); 2880 } 2881 2882 /* 2883 * Disable raw packet checksumming so that RSS hash is placed in 2884 * descriptor on writeback. No need to enable TCP/UDP/IP checksum 2885 * offloads as they are enabled by default 2886 */ 2887 rxcsum = rd32(E1000_RXCSUM); 2888 rxcsum |= E1000_RXCSUM_PCSD; 2889 2890 if (adapter->hw.mac.type >= e1000_82576) 2891 /* Enable Receive Checksum Offload for SCTP */ 2892 rxcsum |= E1000_RXCSUM_CRCOFL; 2893 2894 /* Don't need to set TUOFL or IPOFL, they default to 1 */ 2895 wr32(E1000_RXCSUM, rxcsum); 2896 /* 2897 * Generate RSS hash based on TCP port numbers and/or 2898 * IPv4/v6 src and dst addresses since UDP cannot be 2899 * hashed reliably due to IP fragmentation 2900 */ 2901 2902 mrqc = E1000_MRQC_RSS_FIELD_IPV4 | 2903 E1000_MRQC_RSS_FIELD_IPV4_TCP | 2904 E1000_MRQC_RSS_FIELD_IPV6 | 2905 E1000_MRQC_RSS_FIELD_IPV6_TCP | 2906 E1000_MRQC_RSS_FIELD_IPV6_TCP_EX; 2907 2908 /* If VMDq is enabled then we set the appropriate mode for that, else 2909 * we default to RSS so that an RSS hash is calculated per packet even 2910 * if we are only using one queue */ 2911 if (adapter->vfs_allocated_count) { 2912 if (hw->mac.type > e1000_82575) { 2913 /* Set the default pool for the PF's first queue */ 2914 u32 vtctl = rd32(E1000_VT_CTL); 2915 vtctl &= ~(E1000_VT_CTL_DEFAULT_POOL_MASK | 2916 E1000_VT_CTL_DISABLE_DEF_POOL); 2917 vtctl |= adapter->vfs_allocated_count << 2918 E1000_VT_CTL_DEFAULT_POOL_SHIFT; 2919 wr32(E1000_VT_CTL, vtctl); 2920 } 2921 if (adapter->rss_queues > 1) 2922 mrqc |= E1000_MRQC_ENABLE_VMDQ_RSS_2Q; 2923 else 2924 mrqc |= E1000_MRQC_ENABLE_VMDQ; 2925 } else { 2926 if (hw->mac.type != e1000_i211) 2927 mrqc |= E1000_MRQC_ENABLE_RSS_4Q; 2928 } 2929 igb_vmm_control(adapter); 2930 2931 wr32(E1000_MRQC, mrqc); 2932} 2933 2934/** 2935 * igb_setup_rctl - configure the receive control registers 2936 * @adapter: Board private structure 2937 **/ 2938void igb_setup_rctl(struct igb_adapter *adapter) 2939{ 2940 struct e1000_hw *hw = &adapter->hw; 2941 u32 rctl; 2942 2943 rctl = rd32(E1000_RCTL); 2944 2945 rctl &= ~(3 << E1000_RCTL_MO_SHIFT); 2946 rctl &= ~(E1000_RCTL_LBM_TCVR | E1000_RCTL_LBM_MAC); 2947 2948 rctl |= E1000_RCTL_EN | E1000_RCTL_BAM | E1000_RCTL_RDMTS_HALF | 2949 (hw->mac.mc_filter_type << E1000_RCTL_MO_SHIFT); 2950 2951 /* 2952 * enable stripping of CRC. It's unlikely this will break BMC 2953 * redirection as it did with e1000. Newer features require 2954 * that the HW strips the CRC. 2955 */ 2956 rctl |= E1000_RCTL_SECRC; 2957 2958 /* disable store bad packets and clear size bits. */ 2959 rctl &= ~(E1000_RCTL_SBP | E1000_RCTL_SZ_256); 2960 2961 /* enable LPE to prevent packets larger than max_frame_size */ 2962 rctl |= E1000_RCTL_LPE; 2963 2964 /* disable queue 0 to prevent tail write w/o re-config */ 2965 wr32(E1000_RXDCTL(0), 0); 2966 2967 /* Attention!!! For SR-IOV PF driver operations you must enable 2968 * queue drop for all VF and PF queues to prevent head of line blocking 2969 * if an un-trusted VF does not provide descriptors to hardware. 2970 */ 2971 if (adapter->vfs_allocated_count) { 2972 /* set all queue drop enable bits */ 2973 wr32(E1000_QDE, ALL_QUEUES); 2974 } 2975 2976 /* This is useful for sniffing bad packets. */ 2977 if (adapter->netdev->features & NETIF_F_RXALL) { 2978 /* UPE and MPE will be handled by normal PROMISC logic 2979 * in e1000e_set_rx_mode */ 2980 rctl |= (E1000_RCTL_SBP | /* Receive bad packets */ 2981 E1000_RCTL_BAM | /* RX All Bcast Pkts */ 2982 E1000_RCTL_PMCF); /* RX All MAC Ctrl Pkts */ 2983 2984 rctl &= ~(E1000_RCTL_VFE | /* Disable VLAN filter */ 2985 E1000_RCTL_DPF | /* Allow filtered pause */ 2986 E1000_RCTL_CFIEN); /* Dis VLAN CFIEN Filter */ 2987 /* Do not mess with E1000_CTRL_VME, it affects transmit as well, 2988 * and that breaks VLANs. 2989 */ 2990 } 2991 2992 wr32(E1000_RCTL, rctl); 2993} 2994 2995static inline int igb_set_vf_rlpml(struct igb_adapter *adapter, int size, 2996 int vfn) 2997{ 2998 struct e1000_hw *hw = &adapter->hw; 2999 u32 vmolr; 3000 3001 /* if it isn't the PF check to see if VFs are enabled and 3002 * increase the size to support vlan tags */ 3003 if (vfn < adapter->vfs_allocated_count && 3004 adapter->vf_data[vfn].vlans_enabled) 3005 size += VLAN_TAG_SIZE; 3006 3007 vmolr = rd32(E1000_VMOLR(vfn)); 3008 vmolr &= ~E1000_VMOLR_RLPML_MASK; 3009 vmolr |= size | E1000_VMOLR_LPE; 3010 wr32(E1000_VMOLR(vfn), vmolr); 3011 3012 return 0; 3013} 3014 3015/** 3016 * igb_rlpml_set - set maximum receive packet size 3017 * @adapter: board private structure 3018 * 3019 * Configure maximum receivable packet size. 3020 **/ 3021static void igb_rlpml_set(struct igb_adapter *adapter) 3022{ 3023 u32 max_frame_size = adapter->max_frame_size; 3024 struct e1000_hw *hw = &adapter->hw; 3025 u16 pf_id = adapter->vfs_allocated_count; 3026 3027 if (pf_id) { 3028 igb_set_vf_rlpml(adapter, max_frame_size, pf_id); 3029 /* 3030 * If we're in VMDQ or SR-IOV mode, then set global RLPML 3031 * to our max jumbo frame size, in case we need to enable 3032 * jumbo frames on one of the rings later. 3033 * This will not pass over-length frames into the default 3034 * queue because it's gated by the VMOLR.RLPML. 3035 */ 3036 max_frame_size = MAX_JUMBO_FRAME_SIZE; 3037 } 3038 3039 wr32(E1000_RLPML, max_frame_size); 3040} 3041 3042static inline void igb_set_vmolr(struct igb_adapter *adapter, 3043 int vfn, bool aupe) 3044{ 3045 struct e1000_hw *hw = &adapter->hw; 3046 u32 vmolr; 3047 3048 /* 3049 * This register exists only on 82576 and newer so if we are older then 3050 * we should exit and do nothing 3051 */ 3052 if (hw->mac.type < e1000_82576) 3053 return; 3054 3055 vmolr = rd32(E1000_VMOLR(vfn)); 3056 vmolr |= E1000_VMOLR_STRVLAN; /* Strip vlan tags */ 3057 if (aupe) 3058 vmolr |= E1000_VMOLR_AUPE; /* Accept untagged packets */ 3059 else 3060 vmolr &= ~(E1000_VMOLR_AUPE); /* Tagged packets ONLY */ 3061 3062 /* clear all bits that might not be set */ 3063 vmolr &= ~(E1000_VMOLR_BAM | E1000_VMOLR_RSSE); 3064 3065 if (adapter->rss_queues > 1 && vfn == adapter->vfs_allocated_count) 3066 vmolr |= E1000_VMOLR_RSSE; /* enable RSS */ 3067 /* 3068 * for VMDq only allow the VFs and pool 0 to accept broadcast and 3069 * multicast packets 3070 */ 3071 if (vfn <= adapter->vfs_allocated_count) 3072 vmolr |= E1000_VMOLR_BAM; /* Accept broadcast */ 3073 3074 wr32(E1000_VMOLR(vfn), vmolr); 3075} 3076 3077/** 3078 * igb_configure_rx_ring - Configure a receive ring after Reset 3079 * @adapter: board private structure 3080 * @ring: receive ring to be configured 3081 * 3082 * Configure the Rx unit of the MAC after a reset. 3083 **/ 3084void igb_configure_rx_ring(struct igb_adapter *adapter, 3085 struct igb_ring *ring) 3086{ 3087 struct e1000_hw *hw = &adapter->hw; 3088 u64 rdba = ring->dma; 3089 int reg_idx = ring->reg_idx; 3090 u32 srrctl = 0, rxdctl = 0; 3091 3092 /* disable the queue */ 3093 wr32(E1000_RXDCTL(reg_idx), 0); 3094 3095 /* Set DMA base address registers */ 3096 wr32(E1000_RDBAL(reg_idx), 3097 rdba & 0x00000000ffffffffULL); 3098 wr32(E1000_RDBAH(reg_idx), rdba >> 32); 3099 wr32(E1000_RDLEN(reg_idx), 3100 ring->count * sizeof(union e1000_adv_rx_desc)); 3101 3102 /* initialize head and tail */ 3103 ring->tail = hw->hw_addr + E1000_RDT(reg_idx); 3104 wr32(E1000_RDH(reg_idx), 0); 3105 writel(0, ring->tail); 3106 3107 /* set descriptor configuration */ 3108 srrctl = IGB_RX_HDR_LEN << E1000_SRRCTL_BSIZEHDRSIZE_SHIFT; 3109#if (PAGE_SIZE / 2) > IGB_RXBUFFER_16384 3110 srrctl |= IGB_RXBUFFER_16384 >> E1000_SRRCTL_BSIZEPKT_SHIFT; 3111#else 3112 srrctl |= (PAGE_SIZE / 2) >> E1000_SRRCTL_BSIZEPKT_SHIFT; 3113#endif 3114 srrctl |= E1000_SRRCTL_DESCTYPE_HDR_SPLIT_ALWAYS; 3115#ifdef CONFIG_IGB_PTP 3116 if (hw->mac.type >= e1000_82580) 3117 srrctl |= E1000_SRRCTL_TIMESTAMP; 3118#endif /* CONFIG_IGB_PTP */ 3119 /* Only set Drop Enable if we are supporting multiple queues */ 3120 if (adapter->vfs_allocated_count || adapter->num_rx_queues > 1) 3121 srrctl |= E1000_SRRCTL_DROP_EN; 3122 3123 wr32(E1000_SRRCTL(reg_idx), srrctl); 3124 3125 /* set filtering for VMDQ pools */ 3126 igb_set_vmolr(adapter, reg_idx & 0x7, true); 3127 3128 rxdctl |= IGB_RX_PTHRESH; 3129 rxdctl |= IGB_RX_HTHRESH << 8; 3130 rxdctl |= IGB_RX_WTHRESH << 16; 3131 3132 /* enable receive descriptor fetching */ 3133 rxdctl |= E1000_RXDCTL_QUEUE_ENABLE; 3134 wr32(E1000_RXDCTL(reg_idx), rxdctl); 3135} 3136 3137/** 3138 * igb_configure_rx - Configure receive Unit after Reset 3139 * @adapter: board private structure 3140 * 3141 * Configure the Rx unit of the MAC after a reset. 3142 **/ 3143static void igb_configure_rx(struct igb_adapter *adapter) 3144{ 3145 int i; 3146 3147 /* set UTA to appropriate mode */ 3148 igb_set_uta(adapter); 3149 3150 /* set the correct pool for the PF default MAC address in entry 0 */ 3151 igb_rar_set_qsel(adapter, adapter->hw.mac.addr, 0, 3152 adapter->vfs_allocated_count); 3153 3154 /* Setup the HW Rx Head and Tail Descriptor Pointers and 3155 * the Base and Length of the Rx Descriptor Ring */ 3156 for (i = 0; i < adapter->num_rx_queues; i++) 3157 igb_configure_rx_ring(adapter, adapter->rx_ring[i]); 3158} 3159 3160/** 3161 * igb_free_tx_resources - Free Tx Resources per Queue 3162 * @tx_ring: Tx descriptor ring for a specific queue 3163 * 3164 * Free all transmit software resources 3165 **/ 3166void igb_free_tx_resources(struct igb_ring *tx_ring) 3167{ 3168 igb_clean_tx_ring(tx_ring); 3169 3170 vfree(tx_ring->tx_buffer_info); 3171 tx_ring->tx_buffer_info = NULL; 3172 3173 /* if not set, then don't free */ 3174 if (!tx_ring->desc) 3175 return; 3176 3177 dma_free_coherent(tx_ring->dev, tx_ring->size, 3178 tx_ring->desc, tx_ring->dma); 3179 3180 tx_ring->desc = NULL; 3181} 3182 3183/** 3184 * igb_free_all_tx_resources - Free Tx Resources for All Queues 3185 * @adapter: board private structure 3186 * 3187 * Free all transmit software resources 3188 **/ 3189static void igb_free_all_tx_resources(struct igb_adapter *adapter) 3190{ 3191 int i; 3192 3193 for (i = 0; i < adapter->num_tx_queues; i++) 3194 igb_free_tx_resources(adapter->tx_ring[i]); 3195} 3196 3197void igb_unmap_and_free_tx_resource(struct igb_ring *ring, 3198 struct igb_tx_buffer *tx_buffer) 3199{ 3200 if (tx_buffer->skb) { 3201 dev_kfree_skb_any(tx_buffer->skb); 3202 if (dma_unmap_len(tx_buffer, len)) 3203 dma_unmap_single(ring->dev, 3204 dma_unmap_addr(tx_buffer, dma), 3205 dma_unmap_len(tx_buffer, len), 3206 DMA_TO_DEVICE); 3207 } else if (dma_unmap_len(tx_buffer, len)) { 3208 dma_unmap_page(ring->dev, 3209 dma_unmap_addr(tx_buffer, dma), 3210 dma_unmap_len(tx_buffer, len), 3211 DMA_TO_DEVICE); 3212 } 3213 tx_buffer->next_to_watch = NULL; 3214 tx_buffer->skb = NULL; 3215 dma_unmap_len_set(tx_buffer, len, 0); 3216 /* buffer_info must be completely set up in the transmit path */ 3217} 3218 3219/** 3220 * igb_clean_tx_ring - Free Tx Buffers 3221 * @tx_ring: ring to be cleaned 3222 **/ 3223static void igb_clean_tx_ring(struct igb_ring *tx_ring) 3224{ 3225 struct igb_tx_buffer *buffer_info; 3226 unsigned long size; 3227 u16 i; 3228 3229 if (!tx_ring->tx_buffer_info) 3230 return; 3231 /* Free all the Tx ring sk_buffs */ 3232 3233 for (i = 0; i < tx_ring->count; i++) { 3234 buffer_info = &tx_ring->tx_buffer_info[i]; 3235 igb_unmap_and_free_tx_resource(tx_ring, buffer_info); 3236 } 3237 3238 netdev_tx_reset_queue(txring_txq(tx_ring)); 3239 3240 size = sizeof(struct igb_tx_buffer) * tx_ring->count; 3241 memset(tx_ring->tx_buffer_info, 0, size); 3242 3243 /* Zero out the descriptor ring */ 3244 memset(tx_ring->desc, 0, tx_ring->size); 3245 3246 tx_ring->next_to_use = 0; 3247 tx_ring->next_to_clean = 0; 3248} 3249 3250/** 3251 * igb_clean_all_tx_rings - Free Tx Buffers for all queues 3252 * @adapter: board private structure 3253 **/ 3254static void igb_clean_all_tx_rings(struct igb_adapter *adapter) 3255{ 3256 int i; 3257 3258 for (i = 0; i < adapter->num_tx_queues; i++) 3259 igb_clean_tx_ring(adapter->tx_ring[i]); 3260} 3261 3262/** 3263 * igb_free_rx_resources - Free Rx Resources 3264 * @rx_ring: ring to clean the resources from 3265 * 3266 * Free all receive software resources 3267 **/ 3268void igb_free_rx_resources(struct igb_ring *rx_ring) 3269{ 3270 igb_clean_rx_ring(rx_ring); 3271 3272 vfree(rx_ring->rx_buffer_info); 3273 rx_ring->rx_buffer_info = NULL; 3274 3275 /* if not set, then don't free */ 3276 if (!rx_ring->desc) 3277 return; 3278 3279 dma_free_coherent(rx_ring->dev, rx_ring->size, 3280 rx_ring->desc, rx_ring->dma); 3281 3282 rx_ring->desc = NULL; 3283} 3284 3285/** 3286 * igb_free_all_rx_resources - Free Rx Resources for All Queues 3287 * @adapter: board private structure 3288 * 3289 * Free all receive software resources 3290 **/ 3291static void igb_free_all_rx_resources(struct igb_adapter *adapter) 3292{ 3293 int i; 3294 3295 for (i = 0; i < adapter->num_rx_queues; i++) 3296 igb_free_rx_resources(adapter->rx_ring[i]); 3297} 3298 3299/** 3300 * igb_clean_rx_ring - Free Rx Buffers per Queue 3301 * @rx_ring: ring to free buffers from 3302 **/ 3303static void igb_clean_rx_ring(struct igb_ring *rx_ring) 3304{ 3305 unsigned long size; 3306 u16 i; 3307 3308 if (!rx_ring->rx_buffer_info) 3309 return; 3310 3311 /* Free all the Rx ring sk_buffs */ 3312 for (i = 0; i < rx_ring->count; i++) { 3313 struct igb_rx_buffer *buffer_info = &rx_ring->rx_buffer_info[i]; 3314 if (buffer_info->dma) { 3315 dma_unmap_single(rx_ring->dev, 3316 buffer_info->dma, 3317 IGB_RX_HDR_LEN, 3318 DMA_FROM_DEVICE); 3319 buffer_info->dma = 0; 3320 } 3321 3322 if (buffer_info->skb) { 3323 dev_kfree_skb(buffer_info->skb); 3324 buffer_info->skb = NULL; 3325 } 3326 if (buffer_info->page_dma) { 3327 dma_unmap_page(rx_ring->dev, 3328 buffer_info->page_dma, 3329 PAGE_SIZE / 2, 3330 DMA_FROM_DEVICE); 3331 buffer_info->page_dma = 0; 3332 } 3333 if (buffer_info->page) { 3334 put_page(buffer_info->page); 3335 buffer_info->page = NULL; 3336 buffer_info->page_offset = 0; 3337 } 3338 } 3339 3340 size = sizeof(struct igb_rx_buffer) * rx_ring->count; 3341 memset(rx_ring->rx_buffer_info, 0, size); 3342 3343 /* Zero out the descriptor ring */ 3344 memset(rx_ring->desc, 0, rx_ring->size); 3345 3346 rx_ring->next_to_clean = 0; 3347 rx_ring->next_to_use = 0; 3348} 3349 3350/** 3351 * igb_clean_all_rx_rings - Free Rx Buffers for all queues 3352 * @adapter: board private structure 3353 **/ 3354static void igb_clean_all_rx_rings(struct igb_adapter *adapter) 3355{ 3356 int i; 3357 3358 for (i = 0; i < adapter->num_rx_queues; i++) 3359 igb_clean_rx_ring(adapter->rx_ring[i]); 3360} 3361 3362/** 3363 * igb_set_mac - Change the Ethernet Address of the NIC 3364 * @netdev: network interface device structure 3365 * @p: pointer to an address structure 3366 * 3367 * Returns 0 on success, negative on failure 3368 **/ 3369static int igb_set_mac(struct net_device *netdev, void *p) 3370{ 3371 struct igb_adapter *adapter = netdev_priv(netdev); 3372 struct e1000_hw *hw = &adapter->hw; 3373 struct sockaddr *addr = p; 3374 3375 if (!is_valid_ether_addr(addr->sa_data)) 3376 return -EADDRNOTAVAIL; 3377 3378 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len); 3379 memcpy(hw->mac.addr, addr->sa_data, netdev->addr_len); 3380 3381 /* set the correct pool for the new PF MAC address in entry 0 */ 3382 igb_rar_set_qsel(adapter, hw->mac.addr, 0, 3383 adapter->vfs_allocated_count); 3384 3385 return 0; 3386} 3387 3388/** 3389 * igb_write_mc_addr_list - write multicast addresses to MTA 3390 * @netdev: network interface device structure 3391 * 3392 * Writes multicast address list to the MTA hash table. 3393 * Returns: -ENOMEM on failure 3394 * 0 on no addresses written 3395 * X on writing X addresses to MTA 3396 **/ 3397static int igb_write_mc_addr_list(struct net_device *netdev) 3398{ 3399 struct igb_adapter *adapter = netdev_priv(netdev); 3400 struct e1000_hw *hw = &adapter->hw; 3401 struct netdev_hw_addr *ha; 3402 u8 *mta_list; 3403 int i; 3404 3405 if (netdev_mc_empty(netdev)) { 3406 /* nothing to program, so clear mc list */ 3407 igb_update_mc_addr_list(hw, NULL, 0); 3408 igb_restore_vf_multicasts(adapter); 3409 return 0; 3410 } 3411 3412 mta_list = kzalloc(netdev_mc_count(netdev) * 6, GFP_ATOMIC); 3413 if (!mta_list) 3414 return -ENOMEM; 3415 3416 /* The shared function expects a packed array of only addresses. */ 3417 i = 0; 3418 netdev_for_each_mc_addr(ha, netdev) 3419 memcpy(mta_list + (i++ * ETH_ALEN), ha->addr, ETH_ALEN); 3420 3421 igb_update_mc_addr_list(hw, mta_list, i); 3422 kfree(mta_list); 3423 3424 return netdev_mc_count(netdev); 3425} 3426 3427/** 3428 * igb_write_uc_addr_list - write unicast addresses to RAR table 3429 * @netdev: network interface device structure 3430 * 3431 * Writes unicast address list to the RAR table. 3432 * Returns: -ENOMEM on failure/insufficient address space 3433 * 0 on no addresses written 3434 * X on writing X addresses to the RAR table 3435 **/ 3436static int igb_write_uc_addr_list(struct net_device *netdev) 3437{ 3438 struct igb_adapter *adapter = netdev_priv(netdev); 3439 struct e1000_hw *hw = &adapter->hw; 3440 unsigned int vfn = adapter->vfs_allocated_count; 3441 unsigned int rar_entries = hw->mac.rar_entry_count - (vfn + 1); 3442 int count = 0; 3443 3444 /* return ENOMEM indicating insufficient memory for addresses */ 3445 if (netdev_uc_count(netdev) > rar_entries) 3446 return -ENOMEM; 3447 3448 if (!netdev_uc_empty(netdev) && rar_entries) { 3449 struct netdev_hw_addr *ha; 3450 3451 netdev_for_each_uc_addr(ha, netdev) { 3452 if (!rar_entries) 3453 break; 3454 igb_rar_set_qsel(adapter, ha->addr, 3455 rar_entries--, 3456 vfn); 3457 count++; 3458 } 3459 } 3460 /* write the addresses in reverse order to avoid write combining */ 3461 for (; rar_entries > 0 ; rar_entries--) { 3462 wr32(E1000_RAH(rar_entries), 0); 3463 wr32(E1000_RAL(rar_entries), 0); 3464 } 3465 wrfl(); 3466 3467 return count; 3468} 3469 3470/** 3471 * igb_set_rx_mode - Secondary Unicast, Multicast and Promiscuous mode set 3472 * @netdev: network interface device structure 3473 * 3474 * The set_rx_mode entry point is called whenever the unicast or multicast 3475 * address lists or the network interface flags are updated. This routine is 3476 * responsible for configuring the hardware for proper unicast, multicast, 3477 * promiscuous mode, and all-multi behavior. 3478 **/ 3479static void igb_set_rx_mode(struct net_device *netdev) 3480{ 3481 struct igb_adapter *adapter = netdev_priv(netdev); 3482 struct e1000_hw *hw = &adapter->hw; 3483 unsigned int vfn = adapter->vfs_allocated_count; 3484 u32 rctl, vmolr = 0; 3485 int count; 3486 3487 /* Check for Promiscuous and All Multicast modes */ 3488 rctl = rd32(E1000_RCTL); 3489 3490 /* clear the effected bits */ 3491 rctl &= ~(E1000_RCTL_UPE | E1000_RCTL_MPE | E1000_RCTL_VFE); 3492 3493 if (netdev->flags & IFF_PROMISC) { 3494 rctl |= (E1000_RCTL_UPE | E1000_RCTL_MPE); 3495 vmolr |= (E1000_VMOLR_ROPE | E1000_VMOLR_MPME); 3496 } else { 3497 if (netdev->flags & IFF_ALLMULTI) { 3498 rctl |= E1000_RCTL_MPE; 3499 vmolr |= E1000_VMOLR_MPME; 3500 } else { 3501 /* 3502 * Write addresses to the MTA, if the attempt fails 3503 * then we should just turn on promiscuous mode so 3504 * that we can at least receive multicast traffic 3505 */ 3506 count = igb_write_mc_addr_list(netdev); 3507 if (count < 0) { 3508 rctl |= E1000_RCTL_MPE; 3509 vmolr |= E1000_VMOLR_MPME; 3510 } else if (count) { 3511 vmolr |= E1000_VMOLR_ROMPE; 3512 } 3513 } 3514 /* 3515 * Write addresses to available RAR registers, if there is not 3516 * sufficient space to store all the addresses then enable 3517 * unicast promiscuous mode 3518 */ 3519 count = igb_write_uc_addr_list(netdev); 3520 if (count < 0) { 3521 rctl |= E1000_RCTL_UPE; 3522 vmolr |= E1000_VMOLR_ROPE; 3523 } 3524 rctl |= E1000_RCTL_VFE; 3525 } 3526 wr32(E1000_RCTL, rctl); 3527 3528 /* 3529 * In order to support SR-IOV and eventually VMDq it is necessary to set 3530 * the VMOLR to enable the appropriate modes. Without this workaround 3531 * we will have issues with VLAN tag stripping not being done for frames 3532 * that are only arriving because we are the default pool 3533 */ 3534 if ((hw->mac.type < e1000_82576) || (hw->mac.type > e1000_i350)) 3535 return; 3536 3537 vmolr |= rd32(E1000_VMOLR(vfn)) & 3538 ~(E1000_VMOLR_ROPE | E1000_VMOLR_MPME | E1000_VMOLR_ROMPE); 3539 wr32(E1000_VMOLR(vfn), vmolr); 3540 igb_restore_vf_multicasts(adapter); 3541} 3542 3543static void igb_check_wvbr(struct igb_adapter *adapter) 3544{ 3545 struct e1000_hw *hw = &adapter->hw; 3546 u32 wvbr = 0; 3547 3548 switch (hw->mac.type) { 3549 case e1000_82576: 3550 case e1000_i350: 3551 if (!(wvbr = rd32(E1000_WVBR))) 3552 return; 3553 break; 3554 default: 3555 break; 3556 } 3557 3558 adapter->wvbr |= wvbr; 3559} 3560 3561#define IGB_STAGGERED_QUEUE_OFFSET 8 3562 3563static void igb_spoof_check(struct igb_adapter *adapter) 3564{ 3565 int j; 3566 3567 if (!adapter->wvbr) 3568 return; 3569 3570 for(j = 0; j < adapter->vfs_allocated_count; j++) { 3571 if (adapter->wvbr & (1 << j) || 3572 adapter->wvbr & (1 << (j + IGB_STAGGERED_QUEUE_OFFSET))) { 3573 dev_warn(&adapter->pdev->dev, 3574 "Spoof event(s) detected on VF %d\n", j); 3575 adapter->wvbr &= 3576 ~((1 << j) | 3577 (1 << (j + IGB_STAGGERED_QUEUE_OFFSET))); 3578 } 3579 } 3580} 3581 3582/* Need to wait a few seconds after link up to get diagnostic information from 3583 * the phy */ 3584static void igb_update_phy_info(unsigned long data) 3585{ 3586 struct igb_adapter *adapter = (struct igb_adapter *) data; 3587 igb_get_phy_info(&adapter->hw); 3588} 3589 3590/** 3591 * igb_has_link - check shared code for link and determine up/down 3592 * @adapter: pointer to driver private info 3593 **/ 3594bool igb_has_link(struct igb_adapter *adapter) 3595{ 3596 struct e1000_hw *hw = &adapter->hw; 3597 bool link_active = false; 3598 s32 ret_val = 0; 3599 3600 /* get_link_status is set on LSC (link status) interrupt or 3601 * rx sequence error interrupt. get_link_status will stay 3602 * false until the e1000_check_for_link establishes link 3603 * for copper adapters ONLY 3604 */ 3605 switch (hw->phy.media_type) { 3606 case e1000_media_type_copper: 3607 if (hw->mac.get_link_status) { 3608 ret_val = hw->mac.ops.check_for_link(hw); 3609 link_active = !hw->mac.get_link_status; 3610 } else { 3611 link_active = true; 3612 } 3613 break; 3614 case e1000_media_type_internal_serdes: 3615 ret_val = hw->mac.ops.check_for_link(hw); 3616 link_active = hw->mac.serdes_has_link; 3617 break; 3618 default: 3619 case e1000_media_type_unknown: 3620 break; 3621 } 3622 3623 return link_active; 3624} 3625 3626static bool igb_thermal_sensor_event(struct e1000_hw *hw, u32 event) 3627{ 3628 bool ret = false; 3629 u32 ctrl_ext, thstat; 3630 3631 /* check for thermal sensor event on i350 copper only */ 3632 if (hw->mac.type == e1000_i350) { 3633 thstat = rd32(E1000_THSTAT); 3634 ctrl_ext = rd32(E1000_CTRL_EXT); 3635 3636 if ((hw->phy.media_type == e1000_media_type_copper) && 3637 !(ctrl_ext & E1000_CTRL_EXT_LINK_MODE_SGMII)) { 3638 ret = !!(thstat & event); 3639 } 3640 } 3641 3642 return ret; 3643} 3644 3645/** 3646 * igb_watchdog - Timer Call-back 3647 * @data: pointer to adapter cast into an unsigned long 3648 **/ 3649static void igb_watchdog(unsigned long data) 3650{ 3651 struct igb_adapter *adapter = (struct igb_adapter *)data; 3652 /* Do the rest outside of interrupt context */ 3653 schedule_work(&adapter->watchdog_task); 3654} 3655 3656static void igb_watchdog_task(struct work_struct *work) 3657{ 3658 struct igb_adapter *adapter = container_of(work, 3659 struct igb_adapter, 3660 watchdog_task); 3661 struct e1000_hw *hw = &adapter->hw; 3662 struct net_device *netdev = adapter->netdev; 3663 u32 link; 3664 int i; 3665 3666 link = igb_has_link(adapter); 3667 if (link) { 3668 /* Cancel scheduled suspend requests. */ 3669 pm_runtime_resume(netdev->dev.parent); 3670 3671 if (!netif_carrier_ok(netdev)) { 3672 u32 ctrl; 3673 hw->mac.ops.get_speed_and_duplex(hw, 3674 &adapter->link_speed, 3675 &adapter->link_duplex); 3676 3677 ctrl = rd32(E1000_CTRL); 3678 /* Links status message must follow this format */ 3679 printk(KERN_INFO "igb: %s NIC Link is Up %d Mbps %s " 3680 "Duplex, Flow Control: %s\n", 3681 netdev->name, 3682 adapter->link_speed, 3683 adapter->link_duplex == FULL_DUPLEX ? 3684 "Full" : "Half", 3685 (ctrl & E1000_CTRL_TFCE) && 3686 (ctrl & E1000_CTRL_RFCE) ? "RX/TX" : 3687 (ctrl & E1000_CTRL_RFCE) ? "RX" : 3688 (ctrl & E1000_CTRL_TFCE) ? "TX" : "None"); 3689 3690 /* check for thermal sensor event */ 3691 if (igb_thermal_sensor_event(hw, 3692 E1000_THSTAT_LINK_THROTTLE)) { 3693 netdev_info(netdev, "The network adapter link " 3694 "speed was downshifted because it " 3695 "overheated\n"); 3696 } 3697 3698 /* adjust timeout factor according to speed/duplex */ 3699 adapter->tx_timeout_factor = 1; 3700 switch (adapter->link_speed) { 3701 case SPEED_10: 3702 adapter->tx_timeout_factor = 14; 3703 break; 3704 case SPEED_100: 3705 /* maybe add some timeout factor ? */ 3706 break; 3707 } 3708 3709 netif_carrier_on(netdev); 3710 3711 igb_ping_all_vfs(adapter); 3712 igb_check_vf_rate_limit(adapter); 3713 3714 /* link state has changed, schedule phy info update */ 3715 if (!test_bit(__IGB_DOWN, &adapter->state)) 3716 mod_timer(&adapter->phy_info_timer, 3717 round_jiffies(jiffies + 2 * HZ)); 3718 } 3719 } else { 3720 if (netif_carrier_ok(netdev)) { 3721 adapter->link_speed = 0; 3722 adapter->link_duplex = 0; 3723 3724 /* check for thermal sensor event */ 3725 if (igb_thermal_sensor_event(hw, 3726 E1000_THSTAT_PWR_DOWN)) { 3727 netdev_err(netdev, "The network adapter was " 3728 "stopped because it overheated\n"); 3729 } 3730 3731 /* Links status message must follow this format */ 3732 printk(KERN_INFO "igb: %s NIC Link is Down\n", 3733 netdev->name); 3734 netif_carrier_off(netdev); 3735 3736 igb_ping_all_vfs(adapter); 3737 3738 /* link state has changed, schedule phy info update */ 3739 if (!test_bit(__IGB_DOWN, &adapter->state)) 3740 mod_timer(&adapter->phy_info_timer, 3741 round_jiffies(jiffies + 2 * HZ)); 3742 3743 pm_schedule_suspend(netdev->dev.parent, 3744 MSEC_PER_SEC * 5); 3745 } 3746 } 3747 3748 spin_lock(&adapter->stats64_lock); 3749 igb_update_stats(adapter, &adapter->stats64); 3750 spin_unlock(&adapter->stats64_lock); 3751 3752 for (i = 0; i < adapter->num_tx_queues; i++) { 3753 struct igb_ring *tx_ring = adapter->tx_ring[i]; 3754 if (!netif_carrier_ok(netdev)) { 3755 /* We've lost link, so the controller stops DMA, 3756 * but we've got queued Tx work that's never going 3757 * to get done, so reset controller to flush Tx. 3758 * (Do the reset outside of interrupt context). */ 3759 if (igb_desc_unused(tx_ring) + 1 < tx_ring->count) { 3760 adapter->tx_timeout_count++; 3761 schedule_work(&adapter->reset_task); 3762 /* return immediately since reset is imminent */ 3763 return; 3764 } 3765 } 3766 3767 /* Force detection of hung controller every watchdog period */ 3768 set_bit(IGB_RING_FLAG_TX_DETECT_HANG, &tx_ring->flags); 3769 } 3770 3771 /* Cause software interrupt to ensure rx ring is cleaned */ 3772 if (adapter->msix_entries) { 3773 u32 eics = 0; 3774 for (i = 0; i < adapter->num_q_vectors; i++) 3775 eics |= adapter->q_vector[i]->eims_value; 3776 wr32(E1000_EICS, eics); 3777 } else { 3778 wr32(E1000_ICS, E1000_ICS_RXDMT0); 3779 } 3780 3781 igb_spoof_check(adapter); 3782 3783 /* Reset the timer */ 3784 if (!test_bit(__IGB_DOWN, &adapter->state)) 3785 mod_timer(&adapter->watchdog_timer, 3786 round_jiffies(jiffies + 2 * HZ)); 3787} 3788 3789enum latency_range { 3790 lowest_latency = 0, 3791 low_latency = 1, 3792 bulk_latency = 2, 3793 latency_invalid = 255 3794}; 3795 3796/** 3797 * igb_update_ring_itr - update the dynamic ITR value based on packet size 3798 * 3799 * Stores a new ITR value based on strictly on packet size. This 3800 * algorithm is less sophisticated than that used in igb_update_itr, 3801 * due to the difficulty of synchronizing statistics across multiple 3802 * receive rings. The divisors and thresholds used by this function 3803 * were determined based on theoretical maximum wire speed and testing 3804 * data, in order to minimize response time while increasing bulk 3805 * throughput. 3806 * This functionality is controlled by the InterruptThrottleRate module 3807 * parameter (see igb_param.c) 3808 * NOTE: This function is called only when operating in a multiqueue 3809 * receive environment. 3810 * @q_vector: pointer to q_vector 3811 **/ 3812static void igb_update_ring_itr(struct igb_q_vector *q_vector) 3813{ 3814 int new_val = q_vector->itr_val; 3815 int avg_wire_size = 0; 3816 struct igb_adapter *adapter = q_vector->adapter; 3817 unsigned int packets; 3818 3819 /* For non-gigabit speeds, just fix the interrupt rate at 4000 3820 * ints/sec - ITR timer value of 120 ticks. 3821 */ 3822 if (adapter->link_speed != SPEED_1000) { 3823 new_val = IGB_4K_ITR; 3824 goto set_itr_val; 3825 } 3826 3827 packets = q_vector->rx.total_packets; 3828 if (packets) 3829 avg_wire_size = q_vector->rx.total_bytes / packets; 3830 3831 packets = q_vector->tx.total_packets; 3832 if (packets) 3833 avg_wire_size = max_t(u32, avg_wire_size, 3834 q_vector->tx.total_bytes / packets); 3835 3836 /* if avg_wire_size isn't set no work was done */ 3837 if (!avg_wire_size) 3838 goto clear_counts; 3839 3840 /* Add 24 bytes to size to account for CRC, preamble, and gap */ 3841 avg_wire_size += 24; 3842 3843 /* Don't starve jumbo frames */ 3844 avg_wire_size = min(avg_wire_size, 3000); 3845 3846 /* Give a little boost to mid-size frames */ 3847 if ((avg_wire_size > 300) && (avg_wire_size < 1200)) 3848 new_val = avg_wire_size / 3; 3849 else 3850 new_val = avg_wire_size / 2; 3851 3852 /* conservative mode (itr 3) eliminates the lowest_latency setting */ 3853 if (new_val < IGB_20K_ITR && 3854 ((q_vector->rx.ring && adapter->rx_itr_setting == 3) || 3855 (!q_vector->rx.ring && adapter->tx_itr_setting == 3))) 3856 new_val = IGB_20K_ITR; 3857 3858set_itr_val: 3859 if (new_val != q_vector->itr_val) { 3860 q_vector->itr_val = new_val; 3861 q_vector->set_itr = 1; 3862 } 3863clear_counts: 3864 q_vector->rx.total_bytes = 0; 3865 q_vector->rx.total_packets = 0; 3866 q_vector->tx.total_bytes = 0; 3867 q_vector->tx.total_packets = 0; 3868} 3869 3870/** 3871 * igb_update_itr - update the dynamic ITR value based on statistics 3872 * Stores a new ITR value based on packets and byte 3873 * counts during the last interrupt. The advantage of per interrupt 3874 * computation is faster updates and more accurate ITR for the current 3875 * traffic pattern. Constants in this function were computed 3876 * based on theoretical maximum wire speed and thresholds were set based 3877 * on testing data as well as attempting to minimize response time 3878 * while increasing bulk throughput. 3879 * this functionality is controlled by the InterruptThrottleRate module 3880 * parameter (see igb_param.c) 3881 * NOTE: These calculations are only valid when operating in a single- 3882 * queue environment. 3883 * @q_vector: pointer to q_vector 3884 * @ring_container: ring info to update the itr for 3885 **/ 3886static void igb_update_itr(struct igb_q_vector *q_vector, 3887 struct igb_ring_container *ring_container) 3888{ 3889 unsigned int packets = ring_container->total_packets; 3890 unsigned int bytes = ring_container->total_bytes; 3891 u8 itrval = ring_container->itr; 3892 3893 /* no packets, exit with status unchanged */ 3894 if (packets == 0) 3895 return; 3896 3897 switch (itrval) { 3898 case lowest_latency: 3899 /* handle TSO and jumbo frames */ 3900 if (bytes/packets > 8000) 3901 itrval = bulk_latency; 3902 else if ((packets < 5) && (bytes > 512)) 3903 itrval = low_latency; 3904 break; 3905 case low_latency: /* 50 usec aka 20000 ints/s */ 3906 if (bytes > 10000) { 3907 /* this if handles the TSO accounting */ 3908 if (bytes/packets > 8000) { 3909 itrval = bulk_latency; 3910 } else if ((packets < 10) || ((bytes/packets) > 1200)) { 3911 itrval = bulk_latency; 3912 } else if ((packets > 35)) { 3913 itrval = lowest_latency; 3914 } 3915 } else if (bytes/packets > 2000) { 3916 itrval = bulk_latency; 3917 } else if (packets <= 2 && bytes < 512) { 3918 itrval = lowest_latency; 3919 } 3920 break; 3921 case bulk_latency: /* 250 usec aka 4000 ints/s */ 3922 if (bytes > 25000) { 3923 if (packets > 35) 3924 itrval = low_latency; 3925 } else if (bytes < 1500) { 3926 itrval = low_latency; 3927 } 3928 break; 3929 } 3930 3931 /* clear work counters since we have the values we need */ 3932 ring_container->total_bytes = 0; 3933 ring_container->total_packets = 0; 3934 3935 /* write updated itr to ring container */ 3936 ring_container->itr = itrval; 3937} 3938 3939static void igb_set_itr(struct igb_q_vector *q_vector) 3940{ 3941 struct igb_adapter *adapter = q_vector->adapter; 3942 u32 new_itr = q_vector->itr_val; 3943 u8 current_itr = 0; 3944 3945 /* for non-gigabit speeds, just fix the interrupt rate at 4000 */ 3946 if (adapter->link_speed != SPEED_1000) { 3947 current_itr = 0; 3948 new_itr = IGB_4K_ITR; 3949 goto set_itr_now; 3950 } 3951 3952 igb_update_itr(q_vector, &q_vector->tx); 3953 igb_update_itr(q_vector, &q_vector->rx); 3954 3955 current_itr = max(q_vector->rx.itr, q_vector->tx.itr); 3956 3957 /* conservative mode (itr 3) eliminates the lowest_latency setting */ 3958 if (current_itr == lowest_latency && 3959 ((q_vector->rx.ring && adapter->rx_itr_setting == 3) || 3960 (!q_vector->rx.ring && adapter->tx_itr_setting == 3))) 3961 current_itr = low_latency; 3962 3963 switch (current_itr) { 3964 /* counts and packets in update_itr are dependent on these numbers */ 3965 case lowest_latency: 3966 new_itr = IGB_70K_ITR; /* 70,000 ints/sec */ 3967 break; 3968 case low_latency: 3969 new_itr = IGB_20K_ITR; /* 20,000 ints/sec */ 3970 break; 3971 case bulk_latency: 3972 new_itr = IGB_4K_ITR; /* 4,000 ints/sec */ 3973 break; 3974 default: 3975 break; 3976 } 3977 3978set_itr_now: 3979 if (new_itr != q_vector->itr_val) { 3980 /* this attempts to bias the interrupt rate towards Bulk 3981 * by adding intermediate steps when interrupt rate is 3982 * increasing */ 3983 new_itr = new_itr > q_vector->itr_val ? 3984 max((new_itr * q_vector->itr_val) / 3985 (new_itr + (q_vector->itr_val >> 2)), 3986 new_itr) : 3987 new_itr; 3988 /* Don't write the value here; it resets the adapter's 3989 * internal timer, and causes us to delay far longer than 3990 * we should between interrupts. Instead, we write the ITR 3991 * value at the beginning of the next interrupt so the timing 3992 * ends up being correct. 3993 */ 3994 q_vector->itr_val = new_itr; 3995 q_vector->set_itr = 1; 3996 } 3997} 3998 3999static void igb_tx_ctxtdesc(struct igb_ring *tx_ring, u32 vlan_macip_lens, 4000 u32 type_tucmd, u32 mss_l4len_idx) 4001{ 4002 struct e1000_adv_tx_context_desc *context_desc; 4003 u16 i = tx_ring->next_to_use; 4004 4005 context_desc = IGB_TX_CTXTDESC(tx_ring, i); 4006 4007 i++; 4008 tx_ring->next_to_use = (i < tx_ring->count) ? i : 0; 4009 4010 /* set bits to identify this as an advanced context descriptor */ 4011 type_tucmd |= E1000_TXD_CMD_DEXT | E1000_ADVTXD_DTYP_CTXT; 4012 4013 /* For 82575, context index must be unique per ring. */ 4014 if (test_bit(IGB_RING_FLAG_TX_CTX_IDX, &tx_ring->flags)) 4015 mss_l4len_idx |= tx_ring->reg_idx << 4; 4016 4017 context_desc->vlan_macip_lens = cpu_to_le32(vlan_macip_lens); 4018 context_desc->seqnum_seed = 0; 4019 context_desc->type_tucmd_mlhl = cpu_to_le32(type_tucmd); 4020 context_desc->mss_l4len_idx = cpu_to_le32(mss_l4len_idx); 4021} 4022 4023static int igb_tso(struct igb_ring *tx_ring, 4024 struct igb_tx_buffer *first, 4025 u8 *hdr_len) 4026{ 4027 struct sk_buff *skb = first->skb; 4028 u32 vlan_macip_lens, type_tucmd; 4029 u32 mss_l4len_idx, l4len; 4030 4031 if (!skb_is_gso(skb)) 4032 return 0; 4033 4034 if (skb_header_cloned(skb)) { 4035 int err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC); 4036 if (err) 4037 return err; 4038 } 4039 4040 /* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */ 4041 type_tucmd = E1000_ADVTXD_TUCMD_L4T_TCP; 4042 4043 if (first->protocol == __constant_htons(ETH_P_IP)) { 4044 struct iphdr *iph = ip_hdr(skb); 4045 iph->tot_len = 0; 4046 iph->check = 0; 4047 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr, 4048 iph->daddr, 0, 4049 IPPROTO_TCP, 4050 0); 4051 type_tucmd |= E1000_ADVTXD_TUCMD_IPV4; 4052 first->tx_flags |= IGB_TX_FLAGS_TSO | 4053 IGB_TX_FLAGS_CSUM | 4054 IGB_TX_FLAGS_IPV4; 4055 } else if (skb_is_gso_v6(skb)) { 4056 ipv6_hdr(skb)->payload_len = 0; 4057 tcp_hdr(skb)->check = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr, 4058 &ipv6_hdr(skb)->daddr, 4059 0, IPPROTO_TCP, 0); 4060 first->tx_flags |= IGB_TX_FLAGS_TSO | 4061 IGB_TX_FLAGS_CSUM; 4062 } 4063 4064 /* compute header lengths */ 4065 l4len = tcp_hdrlen(skb); 4066 *hdr_len = skb_transport_offset(skb) + l4len; 4067 4068 /* update gso size and bytecount with header size */ 4069 first->gso_segs = skb_shinfo(skb)->gso_segs; 4070 first->bytecount += (first->gso_segs - 1) * *hdr_len; 4071 4072 /* MSS L4LEN IDX */ 4073 mss_l4len_idx = l4len << E1000_ADVTXD_L4LEN_SHIFT; 4074 mss_l4len_idx |= skb_shinfo(skb)->gso_size << E1000_ADVTXD_MSS_SHIFT; 4075 4076 /* VLAN MACLEN IPLEN */ 4077 vlan_macip_lens = skb_network_header_len(skb); 4078 vlan_macip_lens |= skb_network_offset(skb) << E1000_ADVTXD_MACLEN_SHIFT; 4079 vlan_macip_lens |= first->tx_flags & IGB_TX_FLAGS_VLAN_MASK; 4080 4081 igb_tx_ctxtdesc(tx_ring, vlan_macip_lens, type_tucmd, mss_l4len_idx); 4082 4083 return 1; 4084} 4085 4086static void igb_tx_csum(struct igb_ring *tx_ring, struct igb_tx_buffer *first) 4087{ 4088 struct sk_buff *skb = first->skb; 4089 u32 vlan_macip_lens = 0; 4090 u32 mss_l4len_idx = 0; 4091 u32 type_tucmd = 0; 4092 4093 if (skb->ip_summed != CHECKSUM_PARTIAL) { 4094 if (!(first->tx_flags & IGB_TX_FLAGS_VLAN)) 4095 return; 4096 } else { 4097 u8 l4_hdr = 0; 4098 switch (first->protocol) { 4099 case __constant_htons(ETH_P_IP): 4100 vlan_macip_lens |= skb_network_header_len(skb); 4101 type_tucmd |= E1000_ADVTXD_TUCMD_IPV4; 4102 l4_hdr = ip_hdr(skb)->protocol; 4103 break; 4104 case __constant_htons(ETH_P_IPV6): 4105 vlan_macip_lens |= skb_network_header_len(skb); 4106 l4_hdr = ipv6_hdr(skb)->nexthdr; 4107 break; 4108 default: 4109 if (unlikely(net_ratelimit())) { 4110 dev_warn(tx_ring->dev, 4111 "partial checksum but proto=%x!\n", 4112 first->protocol); 4113 } 4114 break; 4115 } 4116 4117 switch (l4_hdr) { 4118 case IPPROTO_TCP: 4119 type_tucmd |= E1000_ADVTXD_TUCMD_L4T_TCP; 4120 mss_l4len_idx = tcp_hdrlen(skb) << 4121 E1000_ADVTXD_L4LEN_SHIFT; 4122 break; 4123 case IPPROTO_SCTP: 4124 type_tucmd |= E1000_ADVTXD_TUCMD_L4T_SCTP; 4125 mss_l4len_idx = sizeof(struct sctphdr) << 4126 E1000_ADVTXD_L4LEN_SHIFT; 4127 break; 4128 case IPPROTO_UDP: 4129 mss_l4len_idx = sizeof(struct udphdr) << 4130 E1000_ADVTXD_L4LEN_SHIFT; 4131 break; 4132 default: 4133 if (unlikely(net_ratelimit())) { 4134 dev_warn(tx_ring->dev, 4135 "partial checksum but l4 proto=%x!\n", 4136 l4_hdr); 4137 } 4138 break; 4139 } 4140 4141 /* update TX checksum flag */ 4142 first->tx_flags |= IGB_TX_FLAGS_CSUM; 4143 } 4144 4145 vlan_macip_lens |= skb_network_offset(skb) << E1000_ADVTXD_MACLEN_SHIFT; 4146 vlan_macip_lens |= first->tx_flags & IGB_TX_FLAGS_VLAN_MASK; 4147 4148 igb_tx_ctxtdesc(tx_ring, vlan_macip_lens, type_tucmd, mss_l4len_idx); 4149} 4150 4151static __le32 igb_tx_cmd_type(u32 tx_flags) 4152{ 4153 /* set type for advanced descriptor with frame checksum insertion */ 4154 __le32 cmd_type = cpu_to_le32(E1000_ADVTXD_DTYP_DATA | 4155 E1000_ADVTXD_DCMD_IFCS | 4156 E1000_ADVTXD_DCMD_DEXT); 4157 4158 /* set HW vlan bit if vlan is present */ 4159 if (tx_flags & IGB_TX_FLAGS_VLAN) 4160 cmd_type |= cpu_to_le32(E1000_ADVTXD_DCMD_VLE); 4161 4162#ifdef CONFIG_IGB_PTP 4163 /* set timestamp bit if present */ 4164 if (unlikely(tx_flags & IGB_TX_FLAGS_TSTAMP)) 4165 cmd_type |= cpu_to_le32(E1000_ADVTXD_MAC_TSTAMP); 4166#endif /* CONFIG_IGB_PTP */ 4167 4168 /* set segmentation bits for TSO */ 4169 if (tx_flags & IGB_TX_FLAGS_TSO) 4170 cmd_type |= cpu_to_le32(E1000_ADVTXD_DCMD_TSE); 4171 4172 return cmd_type; 4173} 4174 4175static void igb_tx_olinfo_status(struct igb_ring *tx_ring, 4176 union e1000_adv_tx_desc *tx_desc, 4177 u32 tx_flags, unsigned int paylen) 4178{ 4179 u32 olinfo_status = paylen << E1000_ADVTXD_PAYLEN_SHIFT; 4180 4181 /* 82575 requires a unique index per ring if any offload is enabled */ 4182 if ((tx_flags & (IGB_TX_FLAGS_CSUM | IGB_TX_FLAGS_VLAN)) && 4183 test_bit(IGB_RING_FLAG_TX_CTX_IDX, &tx_ring->flags)) 4184 olinfo_status |= tx_ring->reg_idx << 4; 4185 4186 /* insert L4 checksum */ 4187 if (tx_flags & IGB_TX_FLAGS_CSUM) { 4188 olinfo_status |= E1000_TXD_POPTS_TXSM << 8; 4189 4190 /* insert IPv4 checksum */ 4191 if (tx_flags & IGB_TX_FLAGS_IPV4) 4192 olinfo_status |= E1000_TXD_POPTS_IXSM << 8; 4193 } 4194 4195 tx_desc->read.olinfo_status = cpu_to_le32(olinfo_status); 4196} 4197 4198/* 4199 * The largest size we can write to the descriptor is 65535. In order to 4200 * maintain a power of two alignment we have to limit ourselves to 32K. 4201 */ 4202#define IGB_MAX_TXD_PWR 15 4203#define IGB_MAX_DATA_PER_TXD (1<<IGB_MAX_TXD_PWR) 4204 4205static void igb_tx_map(struct igb_ring *tx_ring, 4206 struct igb_tx_buffer *first, 4207 const u8 hdr_len) 4208{ 4209 struct sk_buff *skb = first->skb; 4210 struct igb_tx_buffer *tx_buffer; 4211 union e1000_adv_tx_desc *tx_desc; 4212 dma_addr_t dma; 4213 struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[0]; 4214 unsigned int data_len = skb->data_len; 4215 unsigned int size = skb_headlen(skb); 4216 unsigned int paylen = skb->len - hdr_len; 4217 __le32 cmd_type; 4218 u32 tx_flags = first->tx_flags; 4219 u16 i = tx_ring->next_to_use; 4220 4221 tx_desc = IGB_TX_DESC(tx_ring, i); 4222 4223 igb_tx_olinfo_status(tx_ring, tx_desc, tx_flags, paylen); 4224 cmd_type = igb_tx_cmd_type(tx_flags); 4225 4226 dma = dma_map_single(tx_ring->dev, skb->data, size, DMA_TO_DEVICE); 4227 if (dma_mapping_error(tx_ring->dev, dma)) 4228 goto dma_error; 4229 4230 /* record length, and DMA address */ 4231 dma_unmap_len_set(first, len, size); 4232 dma_unmap_addr_set(first, dma, dma); 4233 tx_desc->read.buffer_addr = cpu_to_le64(dma); 4234 4235 for (;;) { 4236 while (unlikely(size > IGB_MAX_DATA_PER_TXD)) { 4237 tx_desc->read.cmd_type_len = 4238 cmd_type | cpu_to_le32(IGB_MAX_DATA_PER_TXD); 4239 4240 i++; 4241 tx_desc++; 4242 if (i == tx_ring->count) { 4243 tx_desc = IGB_TX_DESC(tx_ring, 0); 4244 i = 0; 4245 } 4246 4247 dma += IGB_MAX_DATA_PER_TXD; 4248 size -= IGB_MAX_DATA_PER_TXD; 4249 4250 tx_desc->read.olinfo_status = 0; 4251 tx_desc->read.buffer_addr = cpu_to_le64(dma); 4252 } 4253 4254 if (likely(!data_len)) 4255 break; 4256 4257 tx_desc->read.cmd_type_len = cmd_type | cpu_to_le32(size); 4258 4259 i++; 4260 tx_desc++; 4261 if (i == tx_ring->count) { 4262 tx_desc = IGB_TX_DESC(tx_ring, 0); 4263 i = 0; 4264 } 4265 4266 size = skb_frag_size(frag); 4267 data_len -= size; 4268 4269 dma = skb_frag_dma_map(tx_ring->dev, frag, 0, 4270 size, DMA_TO_DEVICE); 4271 if (dma_mapping_error(tx_ring->dev, dma)) 4272 goto dma_error; 4273 4274 tx_buffer = &tx_ring->tx_buffer_info[i]; 4275 dma_unmap_len_set(tx_buffer, len, size); 4276 dma_unmap_addr_set(tx_buffer, dma, dma); 4277 4278 tx_desc->read.olinfo_status = 0; 4279 tx_desc->read.buffer_addr = cpu_to_le64(dma); 4280 4281 frag++; 4282 } 4283 4284 netdev_tx_sent_queue(txring_txq(tx_ring), first->bytecount); 4285 4286 /* write last descriptor with RS and EOP bits */ 4287 cmd_type |= cpu_to_le32(size) | cpu_to_le32(IGB_TXD_DCMD); 4288 if (unlikely(skb->no_fcs)) 4289 cmd_type &= ~(cpu_to_le32(E1000_ADVTXD_DCMD_IFCS)); 4290 tx_desc->read.cmd_type_len = cmd_type; 4291 4292 /* set the timestamp */ 4293 first->time_stamp = jiffies; 4294 4295 /* 4296 * Force memory writes to complete before letting h/w know there 4297 * are new descriptors to fetch. (Only applicable for weak-ordered 4298 * memory model archs, such as IA-64). 4299 * 4300 * We also need this memory barrier to make certain all of the 4301 * status bits have been updated before next_to_watch is written. 4302 */ 4303 wmb(); 4304 4305 /* set next_to_watch value indicating a packet is present */ 4306 first->next_to_watch = tx_desc; 4307 4308 i++; 4309 if (i == tx_ring->count) 4310 i = 0; 4311 4312 tx_ring->next_to_use = i; 4313 4314 writel(i, tx_ring->tail); 4315 4316 /* we need this if more than one processor can write to our tail 4317 * at a time, it syncronizes IO on IA64/Altix systems */ 4318 mmiowb(); 4319 4320 return; 4321 4322dma_error: 4323 dev_err(tx_ring->dev, "TX DMA map failed\n"); 4324 4325 /* clear dma mappings for failed tx_buffer_info map */ 4326 for (;;) { 4327 tx_buffer = &tx_ring->tx_buffer_info[i]; 4328 igb_unmap_and_free_tx_resource(tx_ring, tx_buffer); 4329 if (tx_buffer == first) 4330 break; 4331 if (i == 0) 4332 i = tx_ring->count; 4333 i--; 4334 } 4335 4336 tx_ring->next_to_use = i; 4337} 4338 4339static int __igb_maybe_stop_tx(struct igb_ring *tx_ring, const u16 size) 4340{ 4341 struct net_device *netdev = tx_ring->netdev; 4342 4343 netif_stop_subqueue(netdev, tx_ring->queue_index); 4344 4345 /* Herbert's original patch had: 4346 * smp_mb__after_netif_stop_queue(); 4347 * but since that doesn't exist yet, just open code it. */ 4348 smp_mb(); 4349 4350 /* We need to check again in a case another CPU has just 4351 * made room available. */ 4352 if (igb_desc_unused(tx_ring) < size) 4353 return -EBUSY; 4354 4355 /* A reprieve! */ 4356 netif_wake_subqueue(netdev, tx_ring->queue_index); 4357 4358 u64_stats_update_begin(&tx_ring->tx_syncp2); 4359 tx_ring->tx_stats.restart_queue2++; 4360 u64_stats_update_end(&tx_ring->tx_syncp2); 4361 4362 return 0; 4363} 4364 4365static inline int igb_maybe_stop_tx(struct igb_ring *tx_ring, const u16 size) 4366{ 4367 if (igb_desc_unused(tx_ring) >= size) 4368 return 0; 4369 return __igb_maybe_stop_tx(tx_ring, size); 4370} 4371 4372netdev_tx_t igb_xmit_frame_ring(struct sk_buff *skb, 4373 struct igb_ring *tx_ring) 4374{ 4375#ifdef CONFIG_IGB_PTP 4376 struct igb_adapter *adapter = netdev_priv(tx_ring->netdev); 4377#endif /* CONFIG_IGB_PTP */ 4378 struct igb_tx_buffer *first; 4379 int tso; 4380 u32 tx_flags = 0; 4381 __be16 protocol = vlan_get_protocol(skb); 4382 u8 hdr_len = 0; 4383 4384 /* need: 1 descriptor per page, 4385 * + 2 desc gap to keep tail from touching head, 4386 * + 1 desc for skb->data, 4387 * + 1 desc for context descriptor, 4388 * otherwise try next time */ 4389 if (igb_maybe_stop_tx(tx_ring, skb_shinfo(skb)->nr_frags + 4)) { 4390 /* this is a hard error */ 4391 return NETDEV_TX_BUSY; 4392 } 4393 4394 /* record the location of the first descriptor for this packet */ 4395 first = &tx_ring->tx_buffer_info[tx_ring->next_to_use]; 4396 first->skb = skb; 4397 first->bytecount = skb->len; 4398 first->gso_segs = 1; 4399 4400#ifdef CONFIG_IGB_PTP 4401 if (unlikely((skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) && 4402 !(adapter->ptp_tx_skb))) { 4403 skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS; 4404 tx_flags |= IGB_TX_FLAGS_TSTAMP; 4405 4406 adapter->ptp_tx_skb = skb_get(skb); 4407 if (adapter->hw.mac.type == e1000_82576) 4408 schedule_work(&adapter->ptp_tx_work); 4409 } 4410#endif /* CONFIG_IGB_PTP */ 4411 4412 if (vlan_tx_tag_present(skb)) { 4413 tx_flags |= IGB_TX_FLAGS_VLAN; 4414 tx_flags |= (vlan_tx_tag_get(skb) << IGB_TX_FLAGS_VLAN_SHIFT); 4415 } 4416 4417 /* record initial flags and protocol */ 4418 first->tx_flags = tx_flags; 4419 first->protocol = protocol; 4420 4421 tso = igb_tso(tx_ring, first, &hdr_len); 4422 if (tso < 0) 4423 goto out_drop; 4424 else if (!tso) 4425 igb_tx_csum(tx_ring, first); 4426 4427 igb_tx_map(tx_ring, first, hdr_len); 4428 4429 /* Make sure there is space in the ring for the next send. */ 4430 igb_maybe_stop_tx(tx_ring, MAX_SKB_FRAGS + 4); 4431 4432 return NETDEV_TX_OK; 4433 4434out_drop: 4435 igb_unmap_and_free_tx_resource(tx_ring, first); 4436 4437 return NETDEV_TX_OK; 4438} 4439 4440static inline struct igb_ring *igb_tx_queue_mapping(struct igb_adapter *adapter, 4441 struct sk_buff *skb) 4442{ 4443 unsigned int r_idx = skb->queue_mapping; 4444 4445 if (r_idx >= adapter->num_tx_queues) 4446 r_idx = r_idx % adapter->num_tx_queues; 4447 4448 return adapter->tx_ring[r_idx]; 4449} 4450 4451static netdev_tx_t igb_xmit_frame(struct sk_buff *skb, 4452 struct net_device *netdev) 4453{ 4454 struct igb_adapter *adapter = netdev_priv(netdev); 4455 4456 if (test_bit(__IGB_DOWN, &adapter->state)) { 4457 dev_kfree_skb_any(skb); 4458 return NETDEV_TX_OK; 4459 } 4460 4461 if (skb->len <= 0) { 4462 dev_kfree_skb_any(skb); 4463 return NETDEV_TX_OK; 4464 } 4465 4466 /* 4467 * The minimum packet size with TCTL.PSP set is 17 so pad the skb 4468 * in order to meet this minimum size requirement. 4469 */ 4470 if (unlikely(skb->len < 17)) { 4471 if (skb_pad(skb, 17 - skb->len)) 4472 return NETDEV_TX_OK; 4473 skb->len = 17; 4474 skb_set_tail_pointer(skb, 17); 4475 } 4476 4477 return igb_xmit_frame_ring(skb, igb_tx_queue_mapping(adapter, skb)); 4478} 4479 4480/** 4481 * igb_tx_timeout - Respond to a Tx Hang 4482 * @netdev: network interface device structure 4483 **/ 4484static void igb_tx_timeout(struct net_device *netdev) 4485{ 4486 struct igb_adapter *adapter = netdev_priv(netdev); 4487 struct e1000_hw *hw = &adapter->hw; 4488 4489 /* Do the reset outside of interrupt context */ 4490 adapter->tx_timeout_count++; 4491 4492 if (hw->mac.type >= e1000_82580) 4493 hw->dev_spec._82575.global_device_reset = true; 4494 4495 schedule_work(&adapter->reset_task); 4496 wr32(E1000_EICS, 4497 (adapter->eims_enable_mask & ~adapter->eims_other)); 4498} 4499 4500static void igb_reset_task(struct work_struct *work) 4501{ 4502 struct igb_adapter *adapter; 4503 adapter = container_of(work, struct igb_adapter, reset_task); 4504 4505 igb_dump(adapter); 4506 netdev_err(adapter->netdev, "Reset adapter\n"); 4507 igb_reinit_locked(adapter); 4508} 4509 4510/** 4511 * igb_get_stats64 - Get System Network Statistics 4512 * @netdev: network interface device structure 4513 * @stats: rtnl_link_stats64 pointer 4514 * 4515 **/ 4516static struct rtnl_link_stats64 *igb_get_stats64(struct net_device *netdev, 4517 struct rtnl_link_stats64 *stats) 4518{ 4519 struct igb_adapter *adapter = netdev_priv(netdev); 4520 4521 spin_lock(&adapter->stats64_lock); 4522 igb_update_stats(adapter, &adapter->stats64); 4523 memcpy(stats, &adapter->stats64, sizeof(*stats)); 4524 spin_unlock(&adapter->stats64_lock); 4525 4526 return stats; 4527} 4528 4529/** 4530 * igb_change_mtu - Change the Maximum Transfer Unit 4531 * @netdev: network interface device structure 4532 * @new_mtu: new value for maximum frame size 4533 * 4534 * Returns 0 on success, negative on failure 4535 **/ 4536static int igb_change_mtu(struct net_device *netdev, int new_mtu) 4537{ 4538 struct igb_adapter *adapter = netdev_priv(netdev); 4539 struct pci_dev *pdev = adapter->pdev; 4540 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN; 4541 4542 if ((new_mtu < 68) || (max_frame > MAX_JUMBO_FRAME_SIZE)) { 4543 dev_err(&pdev->dev, "Invalid MTU setting\n"); 4544 return -EINVAL; 4545 } 4546 4547#define MAX_STD_JUMBO_FRAME_SIZE 9238 4548 if (max_frame > MAX_STD_JUMBO_FRAME_SIZE) { 4549 dev_err(&pdev->dev, "MTU > 9216 not supported.\n"); 4550 return -EINVAL; 4551 } 4552 4553 while (test_and_set_bit(__IGB_RESETTING, &adapter->state)) 4554 msleep(1); 4555 4556 /* igb_down has a dependency on max_frame_size */ 4557 adapter->max_frame_size = max_frame; 4558 4559 if (netif_running(netdev)) 4560 igb_down(adapter); 4561 4562 dev_info(&pdev->dev, "changing MTU from %d to %d\n", 4563 netdev->mtu, new_mtu); 4564 netdev->mtu = new_mtu; 4565 4566 if (netif_running(netdev)) 4567 igb_up(adapter); 4568 else 4569 igb_reset(adapter); 4570 4571 clear_bit(__IGB_RESETTING, &adapter->state); 4572 4573 return 0; 4574} 4575 4576/** 4577 * igb_update_stats - Update the board statistics counters 4578 * @adapter: board private structure 4579 **/ 4580 4581void igb_update_stats(struct igb_adapter *adapter, 4582 struct rtnl_link_stats64 *net_stats) 4583{ 4584 struct e1000_hw *hw = &adapter->hw; 4585 struct pci_dev *pdev = adapter->pdev; 4586 u32 reg, mpc; 4587 u16 phy_tmp; 4588 int i; 4589 u64 bytes, packets; 4590 unsigned int start; 4591 u64 _bytes, _packets; 4592 4593#define PHY_IDLE_ERROR_COUNT_MASK 0x00FF 4594 4595 /* 4596 * Prevent stats update while adapter is being reset, or if the pci 4597 * connection is down. 4598 */ 4599 if (adapter->link_speed == 0) 4600 return; 4601 if (pci_channel_offline(pdev)) 4602 return; 4603 4604 bytes = 0; 4605 packets = 0; 4606 for (i = 0; i < adapter->num_rx_queues; i++) { 4607 u32 rqdpc = rd32(E1000_RQDPC(i)); 4608 struct igb_ring *ring = adapter->rx_ring[i]; 4609 4610 if (rqdpc) { 4611 ring->rx_stats.drops += rqdpc; 4612 net_stats->rx_fifo_errors += rqdpc; 4613 } 4614 4615 do { 4616 start = u64_stats_fetch_begin_bh(&ring->rx_syncp); 4617 _bytes = ring->rx_stats.bytes; 4618 _packets = ring->rx_stats.packets; 4619 } while (u64_stats_fetch_retry_bh(&ring->rx_syncp, start)); 4620 bytes += _bytes; 4621 packets += _packets; 4622 } 4623 4624 net_stats->rx_bytes = bytes; 4625 net_stats->rx_packets = packets; 4626 4627 bytes = 0; 4628 packets = 0; 4629 for (i = 0; i < adapter->num_tx_queues; i++) { 4630 struct igb_ring *ring = adapter->tx_ring[i]; 4631 do { 4632 start = u64_stats_fetch_begin_bh(&ring->tx_syncp); 4633 _bytes = ring->tx_stats.bytes; 4634 _packets = ring->tx_stats.packets; 4635 } while (u64_stats_fetch_retry_bh(&ring->tx_syncp, start)); 4636 bytes += _bytes; 4637 packets += _packets; 4638 } 4639 net_stats->tx_bytes = bytes; 4640 net_stats->tx_packets = packets; 4641 4642 /* read stats registers */ 4643 adapter->stats.crcerrs += rd32(E1000_CRCERRS); 4644 adapter->stats.gprc += rd32(E1000_GPRC); 4645 adapter->stats.gorc += rd32(E1000_GORCL); 4646 rd32(E1000_GORCH); /* clear GORCL */ 4647 adapter->stats.bprc += rd32(E1000_BPRC); 4648 adapter->stats.mprc += rd32(E1000_MPRC); 4649 adapter->stats.roc += rd32(E1000_ROC); 4650 4651 adapter->stats.prc64 += rd32(E1000_PRC64); 4652 adapter->stats.prc127 += rd32(E1000_PRC127); 4653 adapter->stats.prc255 += rd32(E1000_PRC255); 4654 adapter->stats.prc511 += rd32(E1000_PRC511); 4655 adapter->stats.prc1023 += rd32(E1000_PRC1023); 4656 adapter->stats.prc1522 += rd32(E1000_PRC1522); 4657 adapter->stats.symerrs += rd32(E1000_SYMERRS); 4658 adapter->stats.sec += rd32(E1000_SEC); 4659 4660 mpc = rd32(E1000_MPC); 4661 adapter->stats.mpc += mpc; 4662 net_stats->rx_fifo_errors += mpc; 4663 adapter->stats.scc += rd32(E1000_SCC); 4664 adapter->stats.ecol += rd32(E1000_ECOL); 4665 adapter->stats.mcc += rd32(E1000_MCC); 4666 adapter->stats.latecol += rd32(E1000_LATECOL); 4667 adapter->stats.dc += rd32(E1000_DC); 4668 adapter->stats.rlec += rd32(E1000_RLEC); 4669 adapter->stats.xonrxc += rd32(E1000_XONRXC); 4670 adapter->stats.xontxc += rd32(E1000_XONTXC); 4671 adapter->stats.xoffrxc += rd32(E1000_XOFFRXC); 4672 adapter->stats.xofftxc += rd32(E1000_XOFFTXC); 4673 adapter->stats.fcruc += rd32(E1000_FCRUC); 4674 adapter->stats.gptc += rd32(E1000_GPTC); 4675 adapter->stats.gotc += rd32(E1000_GOTCL); 4676 rd32(E1000_GOTCH); /* clear GOTCL */ 4677 adapter->stats.rnbc += rd32(E1000_RNBC); 4678 adapter->stats.ruc += rd32(E1000_RUC); 4679 adapter->stats.rfc += rd32(E1000_RFC); 4680 adapter->stats.rjc += rd32(E1000_RJC); 4681 adapter->stats.tor += rd32(E1000_TORH); 4682 adapter->stats.tot += rd32(E1000_TOTH); 4683 adapter->stats.tpr += rd32(E1000_TPR); 4684 4685 adapter->stats.ptc64 += rd32(E1000_PTC64); 4686 adapter->stats.ptc127 += rd32(E1000_PTC127); 4687 adapter->stats.ptc255 += rd32(E1000_PTC255); 4688 adapter->stats.ptc511 += rd32(E1000_PTC511); 4689 adapter->stats.ptc1023 += rd32(E1000_PTC1023); 4690 adapter->stats.ptc1522 += rd32(E1000_PTC1522); 4691 4692 adapter->stats.mptc += rd32(E1000_MPTC); 4693 adapter->stats.bptc += rd32(E1000_BPTC); 4694 4695 adapter->stats.tpt += rd32(E1000_TPT); 4696 adapter->stats.colc += rd32(E1000_COLC); 4697 4698 adapter->stats.algnerrc += rd32(E1000_ALGNERRC); 4699 /* read internal phy specific stats */ 4700 reg = rd32(E1000_CTRL_EXT); 4701 if (!(reg & E1000_CTRL_EXT_LINK_MODE_MASK)) { 4702 adapter->stats.rxerrc += rd32(E1000_RXERRC); 4703 4704 /* this stat has invalid values on i210/i211 */ 4705 if ((hw->mac.type != e1000_i210) && 4706 (hw->mac.type != e1000_i211)) 4707 adapter->stats.tncrs += rd32(E1000_TNCRS); 4708 } 4709 4710 adapter->stats.tsctc += rd32(E1000_TSCTC); 4711 adapter->stats.tsctfc += rd32(E1000_TSCTFC); 4712 4713 adapter->stats.iac += rd32(E1000_IAC); 4714 adapter->stats.icrxoc += rd32(E1000_ICRXOC); 4715 adapter->stats.icrxptc += rd32(E1000_ICRXPTC); 4716 adapter->stats.icrxatc += rd32(E1000_ICRXATC); 4717 adapter->stats.ictxptc += rd32(E1000_ICTXPTC); 4718 adapter->stats.ictxatc += rd32(E1000_ICTXATC); 4719 adapter->stats.ictxqec += rd32(E1000_ICTXQEC); 4720 adapter->stats.ictxqmtc += rd32(E1000_ICTXQMTC); 4721 adapter->stats.icrxdmtc += rd32(E1000_ICRXDMTC); 4722 4723 /* Fill out the OS statistics structure */ 4724 net_stats->multicast = adapter->stats.mprc; 4725 net_stats->collisions = adapter->stats.colc; 4726 4727 /* Rx Errors */ 4728 4729 /* RLEC on some newer hardware can be incorrect so build 4730 * our own version based on RUC and ROC */ 4731 net_stats->rx_errors = adapter->stats.rxerrc + 4732 adapter->stats.crcerrs + adapter->stats.algnerrc + 4733 adapter->stats.ruc + adapter->stats.roc + 4734 adapter->stats.cexterr; 4735 net_stats->rx_length_errors = adapter->stats.ruc + 4736 adapter->stats.roc; 4737 net_stats->rx_crc_errors = adapter->stats.crcerrs; 4738 net_stats->rx_frame_errors = adapter->stats.algnerrc; 4739 net_stats->rx_missed_errors = adapter->stats.mpc; 4740 4741 /* Tx Errors */ 4742 net_stats->tx_errors = adapter->stats.ecol + 4743 adapter->stats.latecol; 4744 net_stats->tx_aborted_errors = adapter->stats.ecol; 4745 net_stats->tx_window_errors = adapter->stats.latecol; 4746 net_stats->tx_carrier_errors = adapter->stats.tncrs; 4747 4748 /* Tx Dropped needs to be maintained elsewhere */ 4749 4750 /* Phy Stats */ 4751 if (hw->phy.media_type == e1000_media_type_copper) { 4752 if ((adapter->link_speed == SPEED_1000) && 4753 (!igb_read_phy_reg(hw, PHY_1000T_STATUS, &phy_tmp))) { 4754 phy_tmp &= PHY_IDLE_ERROR_COUNT_MASK; 4755 adapter->phy_stats.idle_errors += phy_tmp; 4756 } 4757 } 4758 4759 /* Management Stats */ 4760 adapter->stats.mgptc += rd32(E1000_MGTPTC); 4761 adapter->stats.mgprc += rd32(E1000_MGTPRC); 4762 adapter->stats.mgpdc += rd32(E1000_MGTPDC); 4763 4764 /* OS2BMC Stats */ 4765 reg = rd32(E1000_MANC); 4766 if (reg & E1000_MANC_EN_BMC2OS) { 4767 adapter->stats.o2bgptc += rd32(E1000_O2BGPTC); 4768 adapter->stats.o2bspc += rd32(E1000_O2BSPC); 4769 adapter->stats.b2ospc += rd32(E1000_B2OSPC); 4770 adapter->stats.b2ogprc += rd32(E1000_B2OGPRC); 4771 } 4772} 4773 4774static irqreturn_t igb_msix_other(int irq, void *data) 4775{ 4776 struct igb_adapter *adapter = data; 4777 struct e1000_hw *hw = &adapter->hw; 4778 u32 icr = rd32(E1000_ICR); 4779 /* reading ICR causes bit 31 of EICR to be cleared */ 4780 4781 if (icr & E1000_ICR_DRSTA) 4782 schedule_work(&adapter->reset_task); 4783 4784 if (icr & E1000_ICR_DOUTSYNC) { 4785 /* HW is reporting DMA is out of sync */ 4786 adapter->stats.doosync++; 4787 /* The DMA Out of Sync is also indication of a spoof event 4788 * in IOV mode. Check the Wrong VM Behavior register to 4789 * see if it is really a spoof event. */ 4790 igb_check_wvbr(adapter); 4791 } 4792 4793 /* Check for a mailbox event */ 4794 if (icr & E1000_ICR_VMMB) 4795 igb_msg_task(adapter); 4796 4797 if (icr & E1000_ICR_LSC) { 4798 hw->mac.get_link_status = 1; 4799 /* guard against interrupt when we're going down */ 4800 if (!test_bit(__IGB_DOWN, &adapter->state)) 4801 mod_timer(&adapter->watchdog_timer, jiffies + 1); 4802 } 4803 4804#ifdef CONFIG_IGB_PTP 4805 if (icr & E1000_ICR_TS) { 4806 u32 tsicr = rd32(E1000_TSICR); 4807 4808 if (tsicr & E1000_TSICR_TXTS) { 4809 /* acknowledge the interrupt */ 4810 wr32(E1000_TSICR, E1000_TSICR_TXTS); 4811 /* retrieve hardware timestamp */ 4812 schedule_work(&adapter->ptp_tx_work); 4813 } 4814 } 4815#endif /* CONFIG_IGB_PTP */ 4816 4817 wr32(E1000_EIMS, adapter->eims_other); 4818 4819 return IRQ_HANDLED; 4820} 4821 4822static void igb_write_itr(struct igb_q_vector *q_vector) 4823{ 4824 struct igb_adapter *adapter = q_vector->adapter; 4825 u32 itr_val = q_vector->itr_val & 0x7FFC; 4826 4827 if (!q_vector->set_itr) 4828 return; 4829 4830 if (!itr_val) 4831 itr_val = 0x4; 4832 4833 if (adapter->hw.mac.type == e1000_82575) 4834 itr_val |= itr_val << 16; 4835 else 4836 itr_val |= E1000_EITR_CNT_IGNR; 4837 4838 writel(itr_val, q_vector->itr_register); 4839 q_vector->set_itr = 0; 4840} 4841 4842static irqreturn_t igb_msix_ring(int irq, void *data) 4843{ 4844 struct igb_q_vector *q_vector = data; 4845 4846 /* Write the ITR value calculated from the previous interrupt. */ 4847 igb_write_itr(q_vector); 4848 4849 napi_schedule(&q_vector->napi); 4850 4851 return IRQ_HANDLED; 4852} 4853 4854#ifdef CONFIG_IGB_DCA 4855static void igb_update_dca(struct igb_q_vector *q_vector) 4856{ 4857 struct igb_adapter *adapter = q_vector->adapter; 4858 struct e1000_hw *hw = &adapter->hw; 4859 int cpu = get_cpu(); 4860 4861 if (q_vector->cpu == cpu) 4862 goto out_no_update; 4863 4864 if (q_vector->tx.ring) { 4865 int q = q_vector->tx.ring->reg_idx; 4866 u32 dca_txctrl = rd32(E1000_DCA_TXCTRL(q)); 4867 if (hw->mac.type == e1000_82575) { 4868 dca_txctrl &= ~E1000_DCA_TXCTRL_CPUID_MASK; 4869 dca_txctrl |= dca3_get_tag(&adapter->pdev->dev, cpu); 4870 } else { 4871 dca_txctrl &= ~E1000_DCA_TXCTRL_CPUID_MASK_82576; 4872 dca_txctrl |= dca3_get_tag(&adapter->pdev->dev, cpu) << 4873 E1000_DCA_TXCTRL_CPUID_SHIFT; 4874 } 4875 dca_txctrl |= E1000_DCA_TXCTRL_DESC_DCA_EN; 4876 wr32(E1000_DCA_TXCTRL(q), dca_txctrl); 4877 } 4878 if (q_vector->rx.ring) { 4879 int q = q_vector->rx.ring->reg_idx; 4880 u32 dca_rxctrl = rd32(E1000_DCA_RXCTRL(q)); 4881 if (hw->mac.type == e1000_82575) { 4882 dca_rxctrl &= ~E1000_DCA_RXCTRL_CPUID_MASK; 4883 dca_rxctrl |= dca3_get_tag(&adapter->pdev->dev, cpu); 4884 } else { 4885 dca_rxctrl &= ~E1000_DCA_RXCTRL_CPUID_MASK_82576; 4886 dca_rxctrl |= dca3_get_tag(&adapter->pdev->dev, cpu) << 4887 E1000_DCA_RXCTRL_CPUID_SHIFT; 4888 } 4889 dca_rxctrl |= E1000_DCA_RXCTRL_DESC_DCA_EN; 4890 dca_rxctrl |= E1000_DCA_RXCTRL_HEAD_DCA_EN; 4891 dca_rxctrl |= E1000_DCA_RXCTRL_DATA_DCA_EN; 4892 wr32(E1000_DCA_RXCTRL(q), dca_rxctrl); 4893 } 4894 q_vector->cpu = cpu; 4895out_no_update: 4896 put_cpu(); 4897} 4898 4899static void igb_setup_dca(struct igb_adapter *adapter) 4900{ 4901 struct e1000_hw *hw = &adapter->hw; 4902 int i; 4903 4904 if (!(adapter->flags & IGB_FLAG_DCA_ENABLED)) 4905 return; 4906 4907 /* Always use CB2 mode, difference is masked in the CB driver. */ 4908 wr32(E1000_DCA_CTRL, E1000_DCA_CTRL_DCA_MODE_CB2); 4909 4910 for (i = 0; i < adapter->num_q_vectors; i++) { 4911 adapter->q_vector[i]->cpu = -1; 4912 igb_update_dca(adapter->q_vector[i]); 4913 } 4914} 4915 4916static int __igb_notify_dca(struct device *dev, void *data) 4917{ 4918 struct net_device *netdev = dev_get_drvdata(dev); 4919 struct igb_adapter *adapter = netdev_priv(netdev); 4920 struct pci_dev *pdev = adapter->pdev; 4921 struct e1000_hw *hw = &adapter->hw; 4922 unsigned long event = *(unsigned long *)data; 4923 4924 switch (event) { 4925 case DCA_PROVIDER_ADD: 4926 /* if already enabled, don't do it again */ 4927 if (adapter->flags & IGB_FLAG_DCA_ENABLED) 4928 break; 4929 if (dca_add_requester(dev) == 0) { 4930 adapter->flags |= IGB_FLAG_DCA_ENABLED; 4931 dev_info(&pdev->dev, "DCA enabled\n"); 4932 igb_setup_dca(adapter); 4933 break; 4934 } 4935 /* Fall Through since DCA is disabled. */ 4936 case DCA_PROVIDER_REMOVE: 4937 if (adapter->flags & IGB_FLAG_DCA_ENABLED) { 4938 /* without this a class_device is left 4939 * hanging around in the sysfs model */ 4940 dca_remove_requester(dev); 4941 dev_info(&pdev->dev, "DCA disabled\n"); 4942 adapter->flags &= ~IGB_FLAG_DCA_ENABLED; 4943 wr32(E1000_DCA_CTRL, E1000_DCA_CTRL_DCA_MODE_DISABLE); 4944 } 4945 break; 4946 } 4947 4948 return 0; 4949} 4950 4951static int igb_notify_dca(struct notifier_block *nb, unsigned long event, 4952 void *p) 4953{ 4954 int ret_val; 4955 4956 ret_val = driver_for_each_device(&igb_driver.driver, NULL, &event, 4957 __igb_notify_dca); 4958 4959 return ret_val ? NOTIFY_BAD : NOTIFY_DONE; 4960} 4961#endif /* CONFIG_IGB_DCA */ 4962 4963#ifdef CONFIG_PCI_IOV 4964static int igb_vf_configure(struct igb_adapter *adapter, int vf) 4965{ 4966 unsigned char mac_addr[ETH_ALEN]; 4967 4968 eth_random_addr(mac_addr); 4969 igb_set_vf_mac(adapter, vf, mac_addr); 4970 4971 return 0; 4972} 4973 4974static bool igb_vfs_are_assigned(struct igb_adapter *adapter) 4975{ 4976 struct pci_dev *pdev = adapter->pdev; 4977 struct pci_dev *vfdev; 4978 int dev_id; 4979 4980 switch (adapter->hw.mac.type) { 4981 case e1000_82576: 4982 dev_id = IGB_82576_VF_DEV_ID; 4983 break; 4984 case e1000_i350: 4985 dev_id = IGB_I350_VF_DEV_ID; 4986 break; 4987 default: 4988 return false; 4989 } 4990 4991 /* loop through all the VFs to see if we own any that are assigned */ 4992 vfdev = pci_get_device(PCI_VENDOR_ID_INTEL, dev_id, NULL); 4993 while (vfdev) { 4994 /* if we don't own it we don't care */ 4995 if (vfdev->is_virtfn && vfdev->physfn == pdev) { 4996 /* if it is assigned we cannot release it */ 4997 if (vfdev->dev_flags & PCI_DEV_FLAGS_ASSIGNED) 4998 return true; 4999 } 5000 5001 vfdev = pci_get_device(PCI_VENDOR_ID_INTEL, dev_id, vfdev); 5002 } 5003 5004 return false; 5005} 5006 5007#endif 5008static void igb_ping_all_vfs(struct igb_adapter *adapter) 5009{ 5010 struct e1000_hw *hw = &adapter->hw; 5011 u32 ping; 5012 int i; 5013 5014 for (i = 0 ; i < adapter->vfs_allocated_count; i++) { 5015 ping = E1000_PF_CONTROL_MSG; 5016 if (adapter->vf_data[i].flags & IGB_VF_FLAG_CTS) 5017 ping |= E1000_VT_MSGTYPE_CTS; 5018 igb_write_mbx(hw, &ping, 1, i); 5019 } 5020} 5021 5022static int igb_set_vf_promisc(struct igb_adapter *adapter, u32 *msgbuf, u32 vf) 5023{ 5024 struct e1000_hw *hw = &adapter->hw; 5025 u32 vmolr = rd32(E1000_VMOLR(vf)); 5026 struct vf_data_storage *vf_data = &adapter->vf_data[vf]; 5027 5028 vf_data->flags &= ~(IGB_VF_FLAG_UNI_PROMISC | 5029 IGB_VF_FLAG_MULTI_PROMISC); 5030 vmolr &= ~(E1000_VMOLR_ROPE | E1000_VMOLR_ROMPE | E1000_VMOLR_MPME); 5031 5032 if (*msgbuf & E1000_VF_SET_PROMISC_MULTICAST) { 5033 vmolr |= E1000_VMOLR_MPME; 5034 vf_data->flags |= IGB_VF_FLAG_MULTI_PROMISC; 5035 *msgbuf &= ~E1000_VF_SET_PROMISC_MULTICAST; 5036 } else { 5037 /* 5038 * if we have hashes and we are clearing a multicast promisc 5039 * flag we need to write the hashes to the MTA as this step 5040 * was previously skipped 5041 */ 5042 if (vf_data->num_vf_mc_hashes > 30) { 5043 vmolr |= E1000_VMOLR_MPME; 5044 } else if (vf_data->num_vf_mc_hashes) { 5045 int j; 5046 vmolr |= E1000_VMOLR_ROMPE; 5047 for (j = 0; j < vf_data->num_vf_mc_hashes; j++) 5048 igb_mta_set(hw, vf_data->vf_mc_hashes[j]); 5049 } 5050 } 5051 5052 wr32(E1000_VMOLR(vf), vmolr); 5053 5054 /* there are flags left unprocessed, likely not supported */ 5055 if (*msgbuf & E1000_VT_MSGINFO_MASK) 5056 return -EINVAL; 5057 5058 return 0; 5059 5060} 5061 5062static int igb_set_vf_multicasts(struct igb_adapter *adapter, 5063 u32 *msgbuf, u32 vf) 5064{ 5065 int n = (msgbuf[0] & E1000_VT_MSGINFO_MASK) >> E1000_VT_MSGINFO_SHIFT; 5066 u16 *hash_list = (u16 *)&msgbuf[1]; 5067 struct vf_data_storage *vf_data = &adapter->vf_data[vf]; 5068 int i; 5069 5070 /* salt away the number of multicast addresses assigned 5071 * to this VF for later use to restore when the PF multi cast 5072 * list changes 5073 */ 5074 vf_data->num_vf_mc_hashes = n; 5075 5076 /* only up to 30 hash values supported */ 5077 if (n > 30) 5078 n = 30; 5079 5080 /* store the hashes for later use */ 5081 for (i = 0; i < n; i++) 5082 vf_data->vf_mc_hashes[i] = hash_list[i]; 5083 5084 /* Flush and reset the mta with the new values */ 5085 igb_set_rx_mode(adapter->netdev); 5086 5087 return 0; 5088} 5089 5090static void igb_restore_vf_multicasts(struct igb_adapter *adapter) 5091{ 5092 struct e1000_hw *hw = &adapter->hw; 5093 struct vf_data_storage *vf_data; 5094 int i, j; 5095 5096 for (i = 0; i < adapter->vfs_allocated_count; i++) { 5097 u32 vmolr = rd32(E1000_VMOLR(i)); 5098 vmolr &= ~(E1000_VMOLR_ROMPE | E1000_VMOLR_MPME); 5099 5100 vf_data = &adapter->vf_data[i]; 5101 5102 if ((vf_data->num_vf_mc_hashes > 30) || 5103 (vf_data->flags & IGB_VF_FLAG_MULTI_PROMISC)) { 5104 vmolr |= E1000_VMOLR_MPME; 5105 } else if (vf_data->num_vf_mc_hashes) { 5106 vmolr |= E1000_VMOLR_ROMPE; 5107 for (j = 0; j < vf_data->num_vf_mc_hashes; j++) 5108 igb_mta_set(hw, vf_data->vf_mc_hashes[j]); 5109 } 5110 wr32(E1000_VMOLR(i), vmolr); 5111 } 5112} 5113 5114static void igb_clear_vf_vfta(struct igb_adapter *adapter, u32 vf) 5115{ 5116 struct e1000_hw *hw = &adapter->hw; 5117 u32 pool_mask, reg, vid; 5118 int i; 5119 5120 pool_mask = 1 << (E1000_VLVF_POOLSEL_SHIFT + vf); 5121 5122 /* Find the vlan filter for this id */ 5123 for (i = 0; i < E1000_VLVF_ARRAY_SIZE; i++) { 5124 reg = rd32(E1000_VLVF(i)); 5125 5126 /* remove the vf from the pool */ 5127 reg &= ~pool_mask; 5128 5129 /* if pool is empty then remove entry from vfta */ 5130 if (!(reg & E1000_VLVF_POOLSEL_MASK) && 5131 (reg & E1000_VLVF_VLANID_ENABLE)) { 5132 reg = 0; 5133 vid = reg & E1000_VLVF_VLANID_MASK; 5134 igb_vfta_set(hw, vid, false); 5135 } 5136 5137 wr32(E1000_VLVF(i), reg); 5138 } 5139 5140 adapter->vf_data[vf].vlans_enabled = 0; 5141} 5142 5143static s32 igb_vlvf_set(struct igb_adapter *adapter, u32 vid, bool add, u32 vf) 5144{ 5145 struct e1000_hw *hw = &adapter->hw; 5146 u32 reg, i; 5147 5148 /* The vlvf table only exists on 82576 hardware and newer */ 5149 if (hw->mac.type < e1000_82576) 5150 return -1; 5151 5152 /* we only need to do this if VMDq is enabled */ 5153 if (!adapter->vfs_allocated_count) 5154 return -1; 5155 5156 /* Find the vlan filter for this id */ 5157 for (i = 0; i < E1000_VLVF_ARRAY_SIZE; i++) { 5158 reg = rd32(E1000_VLVF(i)); 5159 if ((reg & E1000_VLVF_VLANID_ENABLE) && 5160 vid == (reg & E1000_VLVF_VLANID_MASK)) 5161 break; 5162 } 5163 5164 if (add) { 5165 if (i == E1000_VLVF_ARRAY_SIZE) { 5166 /* Did not find a matching VLAN ID entry that was 5167 * enabled. Search for a free filter entry, i.e. 5168 * one without the enable bit set 5169 */ 5170 for (i = 0; i < E1000_VLVF_ARRAY_SIZE; i++) { 5171 reg = rd32(E1000_VLVF(i)); 5172 if (!(reg & E1000_VLVF_VLANID_ENABLE)) 5173 break; 5174 } 5175 } 5176 if (i < E1000_VLVF_ARRAY_SIZE) { 5177 /* Found an enabled/available entry */ 5178 reg |= 1 << (E1000_VLVF_POOLSEL_SHIFT + vf); 5179 5180 /* if !enabled we need to set this up in vfta */ 5181 if (!(reg & E1000_VLVF_VLANID_ENABLE)) { 5182 /* add VID to filter table */ 5183 igb_vfta_set(hw, vid, true); 5184 reg |= E1000_VLVF_VLANID_ENABLE; 5185 } 5186 reg &= ~E1000_VLVF_VLANID_MASK; 5187 reg |= vid; 5188 wr32(E1000_VLVF(i), reg); 5189 5190 /* do not modify RLPML for PF devices */ 5191 if (vf >= adapter->vfs_allocated_count) 5192 return 0; 5193 5194 if (!adapter->vf_data[vf].vlans_enabled) { 5195 u32 size; 5196 reg = rd32(E1000_VMOLR(vf)); 5197 size = reg & E1000_VMOLR_RLPML_MASK; 5198 size += 4; 5199 reg &= ~E1000_VMOLR_RLPML_MASK; 5200 reg |= size; 5201 wr32(E1000_VMOLR(vf), reg); 5202 } 5203 5204 adapter->vf_data[vf].vlans_enabled++; 5205 } 5206 } else { 5207 if (i < E1000_VLVF_ARRAY_SIZE) { 5208 /* remove vf from the pool */ 5209 reg &= ~(1 << (E1000_VLVF_POOLSEL_SHIFT + vf)); 5210 /* if pool is empty then remove entry from vfta */ 5211 if (!(reg & E1000_VLVF_POOLSEL_MASK)) { 5212 reg = 0; 5213 igb_vfta_set(hw, vid, false); 5214 } 5215 wr32(E1000_VLVF(i), reg); 5216 5217 /* do not modify RLPML for PF devices */ 5218 if (vf >= adapter->vfs_allocated_count) 5219 return 0; 5220 5221 adapter->vf_data[vf].vlans_enabled--; 5222 if (!adapter->vf_data[vf].vlans_enabled) { 5223 u32 size; 5224 reg = rd32(E1000_VMOLR(vf)); 5225 size = reg & E1000_VMOLR_RLPML_MASK; 5226 size -= 4; 5227 reg &= ~E1000_VMOLR_RLPML_MASK; 5228 reg |= size; 5229 wr32(E1000_VMOLR(vf), reg); 5230 } 5231 } 5232 } 5233 return 0; 5234} 5235 5236static void igb_set_vmvir(struct igb_adapter *adapter, u32 vid, u32 vf) 5237{ 5238 struct e1000_hw *hw = &adapter->hw; 5239 5240 if (vid) 5241 wr32(E1000_VMVIR(vf), (vid | E1000_VMVIR_VLANA_DEFAULT)); 5242 else 5243 wr32(E1000_VMVIR(vf), 0); 5244} 5245 5246static int igb_ndo_set_vf_vlan(struct net_device *netdev, 5247 int vf, u16 vlan, u8 qos) 5248{ 5249 int err = 0; 5250 struct igb_adapter *adapter = netdev_priv(netdev); 5251 5252 if ((vf >= adapter->vfs_allocated_count) || (vlan > 4095) || (qos > 7)) 5253 return -EINVAL; 5254 if (vlan || qos) { 5255 err = igb_vlvf_set(adapter, vlan, !!vlan, vf); 5256 if (err) 5257 goto out; 5258 igb_set_vmvir(adapter, vlan | (qos << VLAN_PRIO_SHIFT), vf); 5259 igb_set_vmolr(adapter, vf, !vlan); 5260 adapter->vf_data[vf].pf_vlan = vlan; 5261 adapter->vf_data[vf].pf_qos = qos; 5262 dev_info(&adapter->pdev->dev, 5263 "Setting VLAN %d, QOS 0x%x on VF %d\n", vlan, qos, vf); 5264 if (test_bit(__IGB_DOWN, &adapter->state)) { 5265 dev_warn(&adapter->pdev->dev, 5266 "The VF VLAN has been set," 5267 " but the PF device is not up.\n"); 5268 dev_warn(&adapter->pdev->dev, 5269 "Bring the PF device up before" 5270 " attempting to use the VF device.\n"); 5271 } 5272 } else { 5273 igb_vlvf_set(adapter, adapter->vf_data[vf].pf_vlan, 5274 false, vf); 5275 igb_set_vmvir(adapter, vlan, vf); 5276 igb_set_vmolr(adapter, vf, true); 5277 adapter->vf_data[vf].pf_vlan = 0; 5278 adapter->vf_data[vf].pf_qos = 0; 5279 } 5280out: 5281 return err; 5282} 5283 5284static int igb_set_vf_vlan(struct igb_adapter *adapter, u32 *msgbuf, u32 vf) 5285{ 5286 int add = (msgbuf[0] & E1000_VT_MSGINFO_MASK) >> E1000_VT_MSGINFO_SHIFT; 5287 int vid = (msgbuf[1] & E1000_VLVF_VLANID_MASK); 5288 5289 return igb_vlvf_set(adapter, vid, add, vf); 5290} 5291 5292static inline void igb_vf_reset(struct igb_adapter *adapter, u32 vf) 5293{ 5294 /* clear flags - except flag that indicates PF has set the MAC */ 5295 adapter->vf_data[vf].flags &= IGB_VF_FLAG_PF_SET_MAC; 5296 adapter->vf_data[vf].last_nack = jiffies; 5297 5298 /* reset offloads to defaults */ 5299 igb_set_vmolr(adapter, vf, true); 5300 5301 /* reset vlans for device */ 5302 igb_clear_vf_vfta(adapter, vf); 5303 if (adapter->vf_data[vf].pf_vlan) 5304 igb_ndo_set_vf_vlan(adapter->netdev, vf, 5305 adapter->vf_data[vf].pf_vlan, 5306 adapter->vf_data[vf].pf_qos); 5307 else 5308 igb_clear_vf_vfta(adapter, vf); 5309 5310 /* reset multicast table array for vf */ 5311 adapter->vf_data[vf].num_vf_mc_hashes = 0; 5312 5313 /* Flush and reset the mta with the new values */ 5314 igb_set_rx_mode(adapter->netdev); 5315} 5316 5317static void igb_vf_reset_event(struct igb_adapter *adapter, u32 vf) 5318{ 5319 unsigned char *vf_mac = adapter->vf_data[vf].vf_mac_addresses; 5320 5321 /* generate a new mac address as we were hotplug removed/added */ 5322 if (!(adapter->vf_data[vf].flags & IGB_VF_FLAG_PF_SET_MAC)) 5323 eth_random_addr(vf_mac); 5324 5325 /* process remaining reset events */ 5326 igb_vf_reset(adapter, vf); 5327} 5328 5329static void igb_vf_reset_msg(struct igb_adapter *adapter, u32 vf) 5330{ 5331 struct e1000_hw *hw = &adapter->hw; 5332 unsigned char *vf_mac = adapter->vf_data[vf].vf_mac_addresses; 5333 int rar_entry = hw->mac.rar_entry_count - (vf + 1); 5334 u32 reg, msgbuf[3]; 5335 u8 *addr = (u8 *)(&msgbuf[1]); 5336 5337 /* process all the same items cleared in a function level reset */ 5338 igb_vf_reset(adapter, vf); 5339 5340 /* set vf mac address */ 5341 igb_rar_set_qsel(adapter, vf_mac, rar_entry, vf); 5342 5343 /* enable transmit and receive for vf */ 5344 reg = rd32(E1000_VFTE); 5345 wr32(E1000_VFTE, reg | (1 << vf)); 5346 reg = rd32(E1000_VFRE); 5347 wr32(E1000_VFRE, reg | (1 << vf)); 5348 5349 adapter->vf_data[vf].flags |= IGB_VF_FLAG_CTS; 5350 5351 /* reply to reset with ack and vf mac address */ 5352 msgbuf[0] = E1000_VF_RESET | E1000_VT_MSGTYPE_ACK; 5353 memcpy(addr, vf_mac, 6); 5354 igb_write_mbx(hw, msgbuf, 3, vf); 5355} 5356 5357static int igb_set_vf_mac_addr(struct igb_adapter *adapter, u32 *msg, int vf) 5358{ 5359 /* 5360 * The VF MAC Address is stored in a packed array of bytes 5361 * starting at the second 32 bit word of the msg array 5362 */ 5363 unsigned char *addr = (char *)&msg[1]; 5364 int err = -1; 5365 5366 if (is_valid_ether_addr(addr)) 5367 err = igb_set_vf_mac(adapter, vf, addr); 5368 5369 return err; 5370} 5371 5372static void igb_rcv_ack_from_vf(struct igb_adapter *adapter, u32 vf) 5373{ 5374 struct e1000_hw *hw = &adapter->hw; 5375 struct vf_data_storage *vf_data = &adapter->vf_data[vf]; 5376 u32 msg = E1000_VT_MSGTYPE_NACK; 5377 5378 /* if device isn't clear to send it shouldn't be reading either */ 5379 if (!(vf_data->flags & IGB_VF_FLAG_CTS) && 5380 time_after(jiffies, vf_data->last_nack + (2 * HZ))) { 5381 igb_write_mbx(hw, &msg, 1, vf); 5382 vf_data->last_nack = jiffies; 5383 } 5384} 5385 5386static void igb_rcv_msg_from_vf(struct igb_adapter *adapter, u32 vf) 5387{ 5388 struct pci_dev *pdev = adapter->pdev; 5389 u32 msgbuf[E1000_VFMAILBOX_SIZE]; 5390 struct e1000_hw *hw = &adapter->hw; 5391 struct vf_data_storage *vf_data = &adapter->vf_data[vf]; 5392 s32 retval; 5393 5394 retval = igb_read_mbx(hw, msgbuf, E1000_VFMAILBOX_SIZE, vf); 5395 5396 if (retval) { 5397 /* if receive failed revoke VF CTS stats and restart init */ 5398 dev_err(&pdev->dev, "Error receiving message from VF\n"); 5399 vf_data->flags &= ~IGB_VF_FLAG_CTS; 5400 if (!time_after(jiffies, vf_data->last_nack + (2 * HZ))) 5401 return; 5402 goto out; 5403 } 5404 5405 /* this is a message we already processed, do nothing */ 5406 if (msgbuf[0] & (E1000_VT_MSGTYPE_ACK | E1000_VT_MSGTYPE_NACK)) 5407 return; 5408 5409 /* 5410 * until the vf completes a reset it should not be 5411 * allowed to start any configuration. 5412 */ 5413 5414 if (msgbuf[0] == E1000_VF_RESET) { 5415 igb_vf_reset_msg(adapter, vf); 5416 return; 5417 } 5418 5419 if (!(vf_data->flags & IGB_VF_FLAG_CTS)) { 5420 if (!time_after(jiffies, vf_data->last_nack + (2 * HZ))) 5421 return; 5422 retval = -1; 5423 goto out; 5424 } 5425 5426 switch ((msgbuf[0] & 0xFFFF)) { 5427 case E1000_VF_SET_MAC_ADDR: 5428 retval = -EINVAL; 5429 if (!(vf_data->flags & IGB_VF_FLAG_PF_SET_MAC)) 5430 retval = igb_set_vf_mac_addr(adapter, msgbuf, vf); 5431 else 5432 dev_warn(&pdev->dev, 5433 "VF %d attempted to override administratively " 5434 "set MAC address\nReload the VF driver to " 5435 "resume operations\n", vf); 5436 break; 5437 case E1000_VF_SET_PROMISC: 5438 retval = igb_set_vf_promisc(adapter, msgbuf, vf); 5439 break; 5440 case E1000_VF_SET_MULTICAST: 5441 retval = igb_set_vf_multicasts(adapter, msgbuf, vf); 5442 break; 5443 case E1000_VF_SET_LPE: 5444 retval = igb_set_vf_rlpml(adapter, msgbuf[1], vf); 5445 break; 5446 case E1000_VF_SET_VLAN: 5447 retval = -1; 5448 if (vf_data->pf_vlan) 5449 dev_warn(&pdev->dev, 5450 "VF %d attempted to override administratively " 5451 "set VLAN tag\nReload the VF driver to " 5452 "resume operations\n", vf); 5453 else 5454 retval = igb_set_vf_vlan(adapter, msgbuf, vf); 5455 break; 5456 default: 5457 dev_err(&pdev->dev, "Unhandled Msg %08x\n", msgbuf[0]); 5458 retval = -1; 5459 break; 5460 } 5461 5462 msgbuf[0] |= E1000_VT_MSGTYPE_CTS; 5463out: 5464 /* notify the VF of the results of what it sent us */ 5465 if (retval) 5466 msgbuf[0] |= E1000_VT_MSGTYPE_NACK; 5467 else 5468 msgbuf[0] |= E1000_VT_MSGTYPE_ACK; 5469 5470 igb_write_mbx(hw, msgbuf, 1, vf); 5471} 5472 5473static void igb_msg_task(struct igb_adapter *adapter) 5474{ 5475 struct e1000_hw *hw = &adapter->hw; 5476 u32 vf; 5477 5478 for (vf = 0; vf < adapter->vfs_allocated_count; vf++) { 5479 /* process any reset requests */ 5480 if (!igb_check_for_rst(hw, vf)) 5481 igb_vf_reset_event(adapter, vf); 5482 5483 /* process any messages pending */ 5484 if (!igb_check_for_msg(hw, vf)) 5485 igb_rcv_msg_from_vf(adapter, vf); 5486 5487 /* process any acks */ 5488 if (!igb_check_for_ack(hw, vf)) 5489 igb_rcv_ack_from_vf(adapter, vf); 5490 } 5491} 5492 5493/** 5494 * igb_set_uta - Set unicast filter table address 5495 * @adapter: board private structure 5496 * 5497 * The unicast table address is a register array of 32-bit registers. 5498 * The table is meant to be used in a way similar to how the MTA is used 5499 * however due to certain limitations in the hardware it is necessary to 5500 * set all the hash bits to 1 and use the VMOLR ROPE bit as a promiscuous 5501 * enable bit to allow vlan tag stripping when promiscuous mode is enabled 5502 **/ 5503static void igb_set_uta(struct igb_adapter *adapter) 5504{ 5505 struct e1000_hw *hw = &adapter->hw; 5506 int i; 5507 5508 /* The UTA table only exists on 82576 hardware and newer */ 5509 if (hw->mac.type < e1000_82576) 5510 return; 5511 5512 /* we only need to do this if VMDq is enabled */ 5513 if (!adapter->vfs_allocated_count) 5514 return; 5515 5516 for (i = 0; i < hw->mac.uta_reg_count; i++) 5517 array_wr32(E1000_UTA, i, ~0); 5518} 5519 5520/** 5521 * igb_intr_msi - Interrupt Handler 5522 * @irq: interrupt number 5523 * @data: pointer to a network interface device structure 5524 **/ 5525static irqreturn_t igb_intr_msi(int irq, void *data) 5526{ 5527 struct igb_adapter *adapter = data; 5528 struct igb_q_vector *q_vector = adapter->q_vector[0]; 5529 struct e1000_hw *hw = &adapter->hw; 5530 /* read ICR disables interrupts using IAM */ 5531 u32 icr = rd32(E1000_ICR); 5532 5533 igb_write_itr(q_vector); 5534 5535 if (icr & E1000_ICR_DRSTA) 5536 schedule_work(&adapter->reset_task); 5537 5538 if (icr & E1000_ICR_DOUTSYNC) { 5539 /* HW is reporting DMA is out of sync */ 5540 adapter->stats.doosync++; 5541 } 5542 5543 if (icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC)) { 5544 hw->mac.get_link_status = 1; 5545 if (!test_bit(__IGB_DOWN, &adapter->state)) 5546 mod_timer(&adapter->watchdog_timer, jiffies + 1); 5547 } 5548 5549#ifdef CONFIG_IGB_PTP 5550 if (icr & E1000_ICR_TS) { 5551 u32 tsicr = rd32(E1000_TSICR); 5552 5553 if (tsicr & E1000_TSICR_TXTS) { 5554 /* acknowledge the interrupt */ 5555 wr32(E1000_TSICR, E1000_TSICR_TXTS); 5556 /* retrieve hardware timestamp */ 5557 schedule_work(&adapter->ptp_tx_work); 5558 } 5559 } 5560#endif /* CONFIG_IGB_PTP */ 5561 5562 napi_schedule(&q_vector->napi); 5563 5564 return IRQ_HANDLED; 5565} 5566 5567/** 5568 * igb_intr - Legacy Interrupt Handler 5569 * @irq: interrupt number 5570 * @data: pointer to a network interface device structure 5571 **/ 5572static irqreturn_t igb_intr(int irq, void *data) 5573{ 5574 struct igb_adapter *adapter = data; 5575 struct igb_q_vector *q_vector = adapter->q_vector[0]; 5576 struct e1000_hw *hw = &adapter->hw; 5577 /* Interrupt Auto-Mask...upon reading ICR, interrupts are masked. No 5578 * need for the IMC write */ 5579 u32 icr = rd32(E1000_ICR); 5580 5581 /* IMS will not auto-mask if INT_ASSERTED is not set, and if it is 5582 * not set, then the adapter didn't send an interrupt */ 5583 if (!(icr & E1000_ICR_INT_ASSERTED)) 5584 return IRQ_NONE; 5585 5586 igb_write_itr(q_vector); 5587 5588 if (icr & E1000_ICR_DRSTA) 5589 schedule_work(&adapter->reset_task); 5590 5591 if (icr & E1000_ICR_DOUTSYNC) { 5592 /* HW is reporting DMA is out of sync */ 5593 adapter->stats.doosync++; 5594 } 5595 5596 if (icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC)) { 5597 hw->mac.get_link_status = 1; 5598 /* guard against interrupt when we're going down */ 5599 if (!test_bit(__IGB_DOWN, &adapter->state)) 5600 mod_timer(&adapter->watchdog_timer, jiffies + 1); 5601 } 5602 5603#ifdef CONFIG_IGB_PTP 5604 if (icr & E1000_ICR_TS) { 5605 u32 tsicr = rd32(E1000_TSICR); 5606 5607 if (tsicr & E1000_TSICR_TXTS) { 5608 /* acknowledge the interrupt */ 5609 wr32(E1000_TSICR, E1000_TSICR_TXTS); 5610 /* retrieve hardware timestamp */ 5611 schedule_work(&adapter->ptp_tx_work); 5612 } 5613 } 5614#endif /* CONFIG_IGB_PTP */ 5615 5616 napi_schedule(&q_vector->napi); 5617 5618 return IRQ_HANDLED; 5619} 5620 5621static void igb_ring_irq_enable(struct igb_q_vector *q_vector) 5622{ 5623 struct igb_adapter *adapter = q_vector->adapter; 5624 struct e1000_hw *hw = &adapter->hw; 5625 5626 if ((q_vector->rx.ring && (adapter->rx_itr_setting & 3)) || 5627 (!q_vector->rx.ring && (adapter->tx_itr_setting & 3))) { 5628 if ((adapter->num_q_vectors == 1) && !adapter->vf_data) 5629 igb_set_itr(q_vector); 5630 else 5631 igb_update_ring_itr(q_vector); 5632 } 5633 5634 if (!test_bit(__IGB_DOWN, &adapter->state)) { 5635 if (adapter->msix_entries) 5636 wr32(E1000_EIMS, q_vector->eims_value); 5637 else 5638 igb_irq_enable(adapter); 5639 } 5640} 5641 5642/** 5643 * igb_poll - NAPI Rx polling callback 5644 * @napi: napi polling structure 5645 * @budget: count of how many packets we should handle 5646 **/ 5647static int igb_poll(struct napi_struct *napi, int budget) 5648{ 5649 struct igb_q_vector *q_vector = container_of(napi, 5650 struct igb_q_vector, 5651 napi); 5652 bool clean_complete = true; 5653 5654#ifdef CONFIG_IGB_DCA 5655 if (q_vector->adapter->flags & IGB_FLAG_DCA_ENABLED) 5656 igb_update_dca(q_vector); 5657#endif 5658 if (q_vector->tx.ring) 5659 clean_complete = igb_clean_tx_irq(q_vector); 5660 5661 if (q_vector->rx.ring) 5662 clean_complete &= igb_clean_rx_irq(q_vector, budget); 5663 5664 /* If all work not completed, return budget and keep polling */ 5665 if (!clean_complete) 5666 return budget; 5667 5668 /* If not enough Rx work done, exit the polling mode */ 5669 napi_complete(napi); 5670 igb_ring_irq_enable(q_vector); 5671 5672 return 0; 5673} 5674 5675/** 5676 * igb_clean_tx_irq - Reclaim resources after transmit completes 5677 * @q_vector: pointer to q_vector containing needed info 5678 * 5679 * returns true if ring is completely cleaned 5680 **/ 5681static bool igb_clean_tx_irq(struct igb_q_vector *q_vector) 5682{ 5683 struct igb_adapter *adapter = q_vector->adapter; 5684 struct igb_ring *tx_ring = q_vector->tx.ring; 5685 struct igb_tx_buffer *tx_buffer; 5686 union e1000_adv_tx_desc *tx_desc; 5687 unsigned int total_bytes = 0, total_packets = 0; 5688 unsigned int budget = q_vector->tx.work_limit; 5689 unsigned int i = tx_ring->next_to_clean; 5690 5691 if (test_bit(__IGB_DOWN, &adapter->state)) 5692 return true; 5693 5694 tx_buffer = &tx_ring->tx_buffer_info[i]; 5695 tx_desc = IGB_TX_DESC(tx_ring, i); 5696 i -= tx_ring->count; 5697 5698 do { 5699 union e1000_adv_tx_desc *eop_desc = tx_buffer->next_to_watch; 5700 5701 /* if next_to_watch is not set then there is no work pending */ 5702 if (!eop_desc) 5703 break; 5704 5705 /* prevent any other reads prior to eop_desc */ 5706 rmb(); 5707 5708 /* if DD is not set pending work has not been completed */ 5709 if (!(eop_desc->wb.status & cpu_to_le32(E1000_TXD_STAT_DD))) 5710 break; 5711 5712 /* clear next_to_watch to prevent false hangs */ 5713 tx_buffer->next_to_watch = NULL; 5714 5715 /* update the statistics for this packet */ 5716 total_bytes += tx_buffer->bytecount; 5717 total_packets += tx_buffer->gso_segs; 5718 5719 /* free the skb */ 5720 dev_kfree_skb_any(tx_buffer->skb); 5721 5722 /* unmap skb header data */ 5723 dma_unmap_single(tx_ring->dev, 5724 dma_unmap_addr(tx_buffer, dma), 5725 dma_unmap_len(tx_buffer, len), 5726 DMA_TO_DEVICE); 5727 5728 /* clear tx_buffer data */ 5729 tx_buffer->skb = NULL; 5730 dma_unmap_len_set(tx_buffer, len, 0); 5731 5732 /* clear last DMA location and unmap remaining buffers */ 5733 while (tx_desc != eop_desc) { 5734 tx_buffer++; 5735 tx_desc++; 5736 i++; 5737 if (unlikely(!i)) { 5738 i -= tx_ring->count; 5739 tx_buffer = tx_ring->tx_buffer_info; 5740 tx_desc = IGB_TX_DESC(tx_ring, 0); 5741 } 5742 5743 /* unmap any remaining paged data */ 5744 if (dma_unmap_len(tx_buffer, len)) { 5745 dma_unmap_page(tx_ring->dev, 5746 dma_unmap_addr(tx_buffer, dma), 5747 dma_unmap_len(tx_buffer, len), 5748 DMA_TO_DEVICE); 5749 dma_unmap_len_set(tx_buffer, len, 0); 5750 } 5751 } 5752 5753 /* move us one more past the eop_desc for start of next pkt */ 5754 tx_buffer++; 5755 tx_desc++; 5756 i++; 5757 if (unlikely(!i)) { 5758 i -= tx_ring->count; 5759 tx_buffer = tx_ring->tx_buffer_info; 5760 tx_desc = IGB_TX_DESC(tx_ring, 0); 5761 } 5762 5763 /* issue prefetch for next Tx descriptor */ 5764 prefetch(tx_desc); 5765 5766 /* update budget accounting */ 5767 budget--; 5768 } while (likely(budget)); 5769 5770 netdev_tx_completed_queue(txring_txq(tx_ring), 5771 total_packets, total_bytes); 5772 i += tx_ring->count; 5773 tx_ring->next_to_clean = i; 5774 u64_stats_update_begin(&tx_ring->tx_syncp); 5775 tx_ring->tx_stats.bytes += total_bytes; 5776 tx_ring->tx_stats.packets += total_packets; 5777 u64_stats_update_end(&tx_ring->tx_syncp); 5778 q_vector->tx.total_bytes += total_bytes; 5779 q_vector->tx.total_packets += total_packets; 5780 5781 if (test_bit(IGB_RING_FLAG_TX_DETECT_HANG, &tx_ring->flags)) { 5782 struct e1000_hw *hw = &adapter->hw; 5783 5784 /* Detect a transmit hang in hardware, this serializes the 5785 * check with the clearing of time_stamp and movement of i */ 5786 clear_bit(IGB_RING_FLAG_TX_DETECT_HANG, &tx_ring->flags); 5787 if (tx_buffer->next_to_watch && 5788 time_after(jiffies, tx_buffer->time_stamp + 5789 (adapter->tx_timeout_factor * HZ)) && 5790 !(rd32(E1000_STATUS) & E1000_STATUS_TXOFF)) { 5791 5792 /* detected Tx unit hang */ 5793 dev_err(tx_ring->dev, 5794 "Detected Tx Unit Hang\n" 5795 " Tx Queue <%d>\n" 5796 " TDH <%x>\n" 5797 " TDT <%x>\n" 5798 " next_to_use <%x>\n" 5799 " next_to_clean <%x>\n" 5800 "buffer_info[next_to_clean]\n" 5801 " time_stamp <%lx>\n" 5802 " next_to_watch <%p>\n" 5803 " jiffies <%lx>\n" 5804 " desc.status <%x>\n", 5805 tx_ring->queue_index, 5806 rd32(E1000_TDH(tx_ring->reg_idx)), 5807 readl(tx_ring->tail), 5808 tx_ring->next_to_use, 5809 tx_ring->next_to_clean, 5810 tx_buffer->time_stamp, 5811 tx_buffer->next_to_watch, 5812 jiffies, 5813 tx_buffer->next_to_watch->wb.status); 5814 netif_stop_subqueue(tx_ring->netdev, 5815 tx_ring->queue_index); 5816 5817 /* we are about to reset, no point in enabling stuff */ 5818 return true; 5819 } 5820 } 5821 5822 if (unlikely(total_packets && 5823 netif_carrier_ok(tx_ring->netdev) && 5824 igb_desc_unused(tx_ring) >= IGB_TX_QUEUE_WAKE)) { 5825 /* Make sure that anybody stopping the queue after this 5826 * sees the new next_to_clean. 5827 */ 5828 smp_mb(); 5829 if (__netif_subqueue_stopped(tx_ring->netdev, 5830 tx_ring->queue_index) && 5831 !(test_bit(__IGB_DOWN, &adapter->state))) { 5832 netif_wake_subqueue(tx_ring->netdev, 5833 tx_ring->queue_index); 5834 5835 u64_stats_update_begin(&tx_ring->tx_syncp); 5836 tx_ring->tx_stats.restart_queue++; 5837 u64_stats_update_end(&tx_ring->tx_syncp); 5838 } 5839 } 5840 5841 return !!budget; 5842} 5843 5844static inline void igb_rx_checksum(struct igb_ring *ring, 5845 union e1000_adv_rx_desc *rx_desc, 5846 struct sk_buff *skb) 5847{ 5848 skb_checksum_none_assert(skb); 5849 5850 /* Ignore Checksum bit is set */ 5851 if (igb_test_staterr(rx_desc, E1000_RXD_STAT_IXSM)) 5852 return; 5853 5854 /* Rx checksum disabled via ethtool */ 5855 if (!(ring->netdev->features & NETIF_F_RXCSUM)) 5856 return; 5857 5858 /* TCP/UDP checksum error bit is set */ 5859 if (igb_test_staterr(rx_desc, 5860 E1000_RXDEXT_STATERR_TCPE | 5861 E1000_RXDEXT_STATERR_IPE)) { 5862 /* 5863 * work around errata with sctp packets where the TCPE aka 5864 * L4E bit is set incorrectly on 64 byte (60 byte w/o crc) 5865 * packets, (aka let the stack check the crc32c) 5866 */ 5867 if (!((skb->len == 60) && 5868 test_bit(IGB_RING_FLAG_RX_SCTP_CSUM, &ring->flags))) { 5869 u64_stats_update_begin(&ring->rx_syncp); 5870 ring->rx_stats.csum_err++; 5871 u64_stats_update_end(&ring->rx_syncp); 5872 } 5873 /* let the stack verify checksum errors */ 5874 return; 5875 } 5876 /* It must be a TCP or UDP packet with a valid checksum */ 5877 if (igb_test_staterr(rx_desc, E1000_RXD_STAT_TCPCS | 5878 E1000_RXD_STAT_UDPCS)) 5879 skb->ip_summed = CHECKSUM_UNNECESSARY; 5880 5881 dev_dbg(ring->dev, "cksum success: bits %08X\n", 5882 le32_to_cpu(rx_desc->wb.upper.status_error)); 5883} 5884 5885static inline void igb_rx_hash(struct igb_ring *ring, 5886 union e1000_adv_rx_desc *rx_desc, 5887 struct sk_buff *skb) 5888{ 5889 if (ring->netdev->features & NETIF_F_RXHASH) 5890 skb->rxhash = le32_to_cpu(rx_desc->wb.lower.hi_dword.rss); 5891} 5892 5893static void igb_rx_vlan(struct igb_ring *ring, 5894 union e1000_adv_rx_desc *rx_desc, 5895 struct sk_buff *skb) 5896{ 5897 if (igb_test_staterr(rx_desc, E1000_RXD_STAT_VP)) { 5898 u16 vid; 5899 if (igb_test_staterr(rx_desc, E1000_RXDEXT_STATERR_LB) && 5900 test_bit(IGB_RING_FLAG_RX_LB_VLAN_BSWAP, &ring->flags)) 5901 vid = be16_to_cpu(rx_desc->wb.upper.vlan); 5902 else 5903 vid = le16_to_cpu(rx_desc->wb.upper.vlan); 5904 5905 __vlan_hwaccel_put_tag(skb, vid); 5906 } 5907} 5908 5909static inline u16 igb_get_hlen(union e1000_adv_rx_desc *rx_desc) 5910{ 5911 /* HW will not DMA in data larger than the given buffer, even if it 5912 * parses the (NFS, of course) header to be larger. In that case, it 5913 * fills the header buffer and spills the rest into the page. 5914 */ 5915 u16 hlen = (le16_to_cpu(rx_desc->wb.lower.lo_dword.hdr_info) & 5916 E1000_RXDADV_HDRBUFLEN_MASK) >> E1000_RXDADV_HDRBUFLEN_SHIFT; 5917 if (hlen > IGB_RX_HDR_LEN) 5918 hlen = IGB_RX_HDR_LEN; 5919 return hlen; 5920} 5921 5922static bool igb_clean_rx_irq(struct igb_q_vector *q_vector, int budget) 5923{ 5924 struct igb_ring *rx_ring = q_vector->rx.ring; 5925 union e1000_adv_rx_desc *rx_desc; 5926 const int current_node = numa_node_id(); 5927 unsigned int total_bytes = 0, total_packets = 0; 5928 u16 cleaned_count = igb_desc_unused(rx_ring); 5929 u16 i = rx_ring->next_to_clean; 5930 5931 rx_desc = IGB_RX_DESC(rx_ring, i); 5932 5933 while (igb_test_staterr(rx_desc, E1000_RXD_STAT_DD)) { 5934 struct igb_rx_buffer *buffer_info = &rx_ring->rx_buffer_info[i]; 5935 struct sk_buff *skb = buffer_info->skb; 5936 union e1000_adv_rx_desc *next_rxd; 5937 5938 buffer_info->skb = NULL; 5939 prefetch(skb->data); 5940 5941 i++; 5942 if (i == rx_ring->count) 5943 i = 0; 5944 5945 next_rxd = IGB_RX_DESC(rx_ring, i); 5946 prefetch(next_rxd); 5947 5948 /* 5949 * This memory barrier is needed to keep us from reading 5950 * any other fields out of the rx_desc until we know the 5951 * RXD_STAT_DD bit is set 5952 */ 5953 rmb(); 5954 5955 if (!skb_is_nonlinear(skb)) { 5956 __skb_put(skb, igb_get_hlen(rx_desc)); 5957 dma_unmap_single(rx_ring->dev, buffer_info->dma, 5958 IGB_RX_HDR_LEN, 5959 DMA_FROM_DEVICE); 5960 buffer_info->dma = 0; 5961 } 5962 5963 if (rx_desc->wb.upper.length) { 5964 u16 length = le16_to_cpu(rx_desc->wb.upper.length); 5965 5966 skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags, 5967 buffer_info->page, 5968 buffer_info->page_offset, 5969 length); 5970 5971 skb->len += length; 5972 skb->data_len += length; 5973 skb->truesize += PAGE_SIZE / 2; 5974 5975 if ((page_count(buffer_info->page) != 1) || 5976 (page_to_nid(buffer_info->page) != current_node)) 5977 buffer_info->page = NULL; 5978 else 5979 get_page(buffer_info->page); 5980 5981 dma_unmap_page(rx_ring->dev, buffer_info->page_dma, 5982 PAGE_SIZE / 2, DMA_FROM_DEVICE); 5983 buffer_info->page_dma = 0; 5984 } 5985 5986 if (!igb_test_staterr(rx_desc, E1000_RXD_STAT_EOP)) { 5987 struct igb_rx_buffer *next_buffer; 5988 next_buffer = &rx_ring->rx_buffer_info[i]; 5989 buffer_info->skb = next_buffer->skb; 5990 buffer_info->dma = next_buffer->dma; 5991 next_buffer->skb = skb; 5992 next_buffer->dma = 0; 5993 goto next_desc; 5994 } 5995 5996 if (unlikely((igb_test_staterr(rx_desc, 5997 E1000_RXDEXT_ERR_FRAME_ERR_MASK)) 5998 && !(rx_ring->netdev->features & NETIF_F_RXALL))) { 5999 dev_kfree_skb_any(skb); 6000 goto next_desc; 6001 } 6002 6003#ifdef CONFIG_IGB_PTP 6004 igb_ptp_rx_hwtstamp(q_vector, rx_desc, skb); 6005#endif /* CONFIG_IGB_PTP */ 6006 igb_rx_hash(rx_ring, rx_desc, skb); 6007 igb_rx_checksum(rx_ring, rx_desc, skb); 6008 igb_rx_vlan(rx_ring, rx_desc, skb); 6009 6010 total_bytes += skb->len; 6011 total_packets++; 6012 6013 skb->protocol = eth_type_trans(skb, rx_ring->netdev); 6014 6015 napi_gro_receive(&q_vector->napi, skb); 6016 6017 budget--; 6018next_desc: 6019 if (!budget) 6020 break; 6021 6022 cleaned_count++; 6023 /* return some buffers to hardware, one at a time is too slow */ 6024 if (cleaned_count >= IGB_RX_BUFFER_WRITE) { 6025 igb_alloc_rx_buffers(rx_ring, cleaned_count); 6026 cleaned_count = 0; 6027 } 6028 6029 /* use prefetched values */ 6030 rx_desc = next_rxd; 6031 } 6032 6033 rx_ring->next_to_clean = i; 6034 u64_stats_update_begin(&rx_ring->rx_syncp); 6035 rx_ring->rx_stats.packets += total_packets; 6036 rx_ring->rx_stats.bytes += total_bytes; 6037 u64_stats_update_end(&rx_ring->rx_syncp); 6038 q_vector->rx.total_packets += total_packets; 6039 q_vector->rx.total_bytes += total_bytes; 6040 6041 if (cleaned_count) 6042 igb_alloc_rx_buffers(rx_ring, cleaned_count); 6043 6044 return !!budget; 6045} 6046 6047static bool igb_alloc_mapped_skb(struct igb_ring *rx_ring, 6048 struct igb_rx_buffer *bi) 6049{ 6050 struct sk_buff *skb = bi->skb; 6051 dma_addr_t dma = bi->dma; 6052 6053 if (dma) 6054 return true; 6055 6056 if (likely(!skb)) { 6057 skb = netdev_alloc_skb_ip_align(rx_ring->netdev, 6058 IGB_RX_HDR_LEN); 6059 bi->skb = skb; 6060 if (!skb) { 6061 rx_ring->rx_stats.alloc_failed++; 6062 return false; 6063 } 6064 6065 /* initialize skb for ring */ 6066 skb_record_rx_queue(skb, rx_ring->queue_index); 6067 } 6068 6069 dma = dma_map_single(rx_ring->dev, skb->data, 6070 IGB_RX_HDR_LEN, DMA_FROM_DEVICE); 6071 6072 if (dma_mapping_error(rx_ring->dev, dma)) { 6073 rx_ring->rx_stats.alloc_failed++; 6074 return false; 6075 } 6076 6077 bi->dma = dma; 6078 return true; 6079} 6080 6081static bool igb_alloc_mapped_page(struct igb_ring *rx_ring, 6082 struct igb_rx_buffer *bi) 6083{ 6084 struct page *page = bi->page; 6085 dma_addr_t page_dma = bi->page_dma; 6086 unsigned int page_offset = bi->page_offset ^ (PAGE_SIZE / 2); 6087 6088 if (page_dma) 6089 return true; 6090 6091 if (!page) { 6092 page = __skb_alloc_page(GFP_ATOMIC, bi->skb); 6093 bi->page = page; 6094 if (unlikely(!page)) { 6095 rx_ring->rx_stats.alloc_failed++; 6096 return false; 6097 } 6098 } 6099 6100 page_dma = dma_map_page(rx_ring->dev, page, 6101 page_offset, PAGE_SIZE / 2, 6102 DMA_FROM_DEVICE); 6103 6104 if (dma_mapping_error(rx_ring->dev, page_dma)) { 6105 rx_ring->rx_stats.alloc_failed++; 6106 return false; 6107 } 6108 6109 bi->page_dma = page_dma; 6110 bi->page_offset = page_offset; 6111 return true; 6112} 6113 6114/** 6115 * igb_alloc_rx_buffers - Replace used receive buffers; packet split 6116 * @adapter: address of board private structure 6117 **/ 6118void igb_alloc_rx_buffers(struct igb_ring *rx_ring, u16 cleaned_count) 6119{ 6120 union e1000_adv_rx_desc *rx_desc; 6121 struct igb_rx_buffer *bi; 6122 u16 i = rx_ring->next_to_use; 6123 6124 rx_desc = IGB_RX_DESC(rx_ring, i); 6125 bi = &rx_ring->rx_buffer_info[i]; 6126 i -= rx_ring->count; 6127 6128 while (cleaned_count--) { 6129 if (!igb_alloc_mapped_skb(rx_ring, bi)) 6130 break; 6131 6132 /* Refresh the desc even if buffer_addrs didn't change 6133 * because each write-back erases this info. */ 6134 rx_desc->read.hdr_addr = cpu_to_le64(bi->dma); 6135 6136 if (!igb_alloc_mapped_page(rx_ring, bi)) 6137 break; 6138 6139 rx_desc->read.pkt_addr = cpu_to_le64(bi->page_dma); 6140 6141 rx_desc++; 6142 bi++; 6143 i++; 6144 if (unlikely(!i)) { 6145 rx_desc = IGB_RX_DESC(rx_ring, 0); 6146 bi = rx_ring->rx_buffer_info; 6147 i -= rx_ring->count; 6148 } 6149 6150 /* clear the hdr_addr for the next_to_use descriptor */ 6151 rx_desc->read.hdr_addr = 0; 6152 } 6153 6154 i += rx_ring->count; 6155 6156 if (rx_ring->next_to_use != i) { 6157 rx_ring->next_to_use = i; 6158 6159 /* Force memory writes to complete before letting h/w 6160 * know there are new descriptors to fetch. (Only 6161 * applicable for weak-ordered memory model archs, 6162 * such as IA-64). */ 6163 wmb(); 6164 writel(i, rx_ring->tail); 6165 } 6166} 6167 6168/** 6169 * igb_mii_ioctl - 6170 * @netdev: 6171 * @ifreq: 6172 * @cmd: 6173 **/ 6174static int igb_mii_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd) 6175{ 6176 struct igb_adapter *adapter = netdev_priv(netdev); 6177 struct mii_ioctl_data *data = if_mii(ifr); 6178 6179 if (adapter->hw.phy.media_type != e1000_media_type_copper) 6180 return -EOPNOTSUPP; 6181 6182 switch (cmd) { 6183 case SIOCGMIIPHY: 6184 data->phy_id = adapter->hw.phy.addr; 6185 break; 6186 case SIOCGMIIREG: 6187 if (igb_read_phy_reg(&adapter->hw, data->reg_num & 0x1F, 6188 &data->val_out)) 6189 return -EIO; 6190 break; 6191 case SIOCSMIIREG: 6192 default: 6193 return -EOPNOTSUPP; 6194 } 6195 return 0; 6196} 6197 6198/** 6199 * igb_ioctl - 6200 * @netdev: 6201 * @ifreq: 6202 * @cmd: 6203 **/ 6204static int igb_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd) 6205{ 6206 switch (cmd) { 6207 case SIOCGMIIPHY: 6208 case SIOCGMIIREG: 6209 case SIOCSMIIREG: 6210 return igb_mii_ioctl(netdev, ifr, cmd); 6211#ifdef CONFIG_IGB_PTP 6212 case SIOCSHWTSTAMP: 6213 return igb_ptp_hwtstamp_ioctl(netdev, ifr, cmd); 6214#endif /* CONFIG_IGB_PTP */ 6215 default: 6216 return -EOPNOTSUPP; 6217 } 6218} 6219 6220s32 igb_read_pcie_cap_reg(struct e1000_hw *hw, u32 reg, u16 *value) 6221{ 6222 struct igb_adapter *adapter = hw->back; 6223 6224 if (pcie_capability_read_word(adapter->pdev, reg, value)) 6225 return -E1000_ERR_CONFIG; 6226 6227 return 0; 6228} 6229 6230s32 igb_write_pcie_cap_reg(struct e1000_hw *hw, u32 reg, u16 *value) 6231{ 6232 struct igb_adapter *adapter = hw->back; 6233 6234 if (pcie_capability_write_word(adapter->pdev, reg, *value)) 6235 return -E1000_ERR_CONFIG; 6236 6237 return 0; 6238} 6239 6240static void igb_vlan_mode(struct net_device *netdev, netdev_features_t features) 6241{ 6242 struct igb_adapter *adapter = netdev_priv(netdev); 6243 struct e1000_hw *hw = &adapter->hw; 6244 u32 ctrl, rctl; 6245 bool enable = !!(features & NETIF_F_HW_VLAN_RX); 6246 6247 if (enable) { 6248 /* enable VLAN tag insert/strip */ 6249 ctrl = rd32(E1000_CTRL); 6250 ctrl |= E1000_CTRL_VME; 6251 wr32(E1000_CTRL, ctrl); 6252 6253 /* Disable CFI check */ 6254 rctl = rd32(E1000_RCTL); 6255 rctl &= ~E1000_RCTL_CFIEN; 6256 wr32(E1000_RCTL, rctl); 6257 } else { 6258 /* disable VLAN tag insert/strip */ 6259 ctrl = rd32(E1000_CTRL); 6260 ctrl &= ~E1000_CTRL_VME; 6261 wr32(E1000_CTRL, ctrl); 6262 } 6263 6264 igb_rlpml_set(adapter); 6265} 6266 6267static int igb_vlan_rx_add_vid(struct net_device *netdev, u16 vid) 6268{ 6269 struct igb_adapter *adapter = netdev_priv(netdev); 6270 struct e1000_hw *hw = &adapter->hw; 6271 int pf_id = adapter->vfs_allocated_count; 6272 6273 /* attempt to add filter to vlvf array */ 6274 igb_vlvf_set(adapter, vid, true, pf_id); 6275 6276 /* add the filter since PF can receive vlans w/o entry in vlvf */ 6277 igb_vfta_set(hw, vid, true); 6278 6279 set_bit(vid, adapter->active_vlans); 6280 6281 return 0; 6282} 6283 6284static int igb_vlan_rx_kill_vid(struct net_device *netdev, u16 vid) 6285{ 6286 struct igb_adapter *adapter = netdev_priv(netdev); 6287 struct e1000_hw *hw = &adapter->hw; 6288 int pf_id = adapter->vfs_allocated_count; 6289 s32 err; 6290 6291 /* remove vlan from VLVF table array */ 6292 err = igb_vlvf_set(adapter, vid, false, pf_id); 6293 6294 /* if vid was not present in VLVF just remove it from table */ 6295 if (err) 6296 igb_vfta_set(hw, vid, false); 6297 6298 clear_bit(vid, adapter->active_vlans); 6299 6300 return 0; 6301} 6302 6303static void igb_restore_vlan(struct igb_adapter *adapter) 6304{ 6305 u16 vid; 6306 6307 igb_vlan_mode(adapter->netdev, adapter->netdev->features); 6308 6309 for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID) 6310 igb_vlan_rx_add_vid(adapter->netdev, vid); 6311} 6312 6313int igb_set_spd_dplx(struct igb_adapter *adapter, u32 spd, u8 dplx) 6314{ 6315 struct pci_dev *pdev = adapter->pdev; 6316 struct e1000_mac_info *mac = &adapter->hw.mac; 6317 6318 mac->autoneg = 0; 6319 6320 /* Make sure dplx is at most 1 bit and lsb of speed is not set 6321 * for the switch() below to work */ 6322 if ((spd & 1) || (dplx & ~1)) 6323 goto err_inval; 6324 6325 /* Fiber NIC's only allow 1000 Gbps Full duplex */ 6326 if ((adapter->hw.phy.media_type == e1000_media_type_internal_serdes) && 6327 spd != SPEED_1000 && 6328 dplx != DUPLEX_FULL) 6329 goto err_inval; 6330 6331 switch (spd + dplx) { 6332 case SPEED_10 + DUPLEX_HALF: 6333 mac->forced_speed_duplex = ADVERTISE_10_HALF; 6334 break; 6335 case SPEED_10 + DUPLEX_FULL: 6336 mac->forced_speed_duplex = ADVERTISE_10_FULL; 6337 break; 6338 case SPEED_100 + DUPLEX_HALF: 6339 mac->forced_speed_duplex = ADVERTISE_100_HALF; 6340 break; 6341 case SPEED_100 + DUPLEX_FULL: 6342 mac->forced_speed_duplex = ADVERTISE_100_FULL; 6343 break; 6344 case SPEED_1000 + DUPLEX_FULL: 6345 mac->autoneg = 1; 6346 adapter->hw.phy.autoneg_advertised = ADVERTISE_1000_FULL; 6347 break; 6348 case SPEED_1000 + DUPLEX_HALF: /* not supported */ 6349 default: 6350 goto err_inval; 6351 } 6352 6353 /* clear MDI, MDI(-X) override is only allowed when autoneg enabled */ 6354 adapter->hw.phy.mdix = AUTO_ALL_MODES; 6355 6356 return 0; 6357 6358err_inval: 6359 dev_err(&pdev->dev, "Unsupported Speed/Duplex configuration\n"); 6360 return -EINVAL; 6361} 6362 6363static int __igb_shutdown(struct pci_dev *pdev, bool *enable_wake, 6364 bool runtime) 6365{ 6366 struct net_device *netdev = pci_get_drvdata(pdev); 6367 struct igb_adapter *adapter = netdev_priv(netdev); 6368 struct e1000_hw *hw = &adapter->hw; 6369 u32 ctrl, rctl, status; 6370 u32 wufc = runtime ? E1000_WUFC_LNKC : adapter->wol; 6371#ifdef CONFIG_PM 6372 int retval = 0; 6373#endif 6374 6375 netif_device_detach(netdev); 6376 6377 if (netif_running(netdev)) 6378 __igb_close(netdev, true); 6379 6380 igb_clear_interrupt_scheme(adapter); 6381 6382#ifdef CONFIG_PM 6383 retval = pci_save_state(pdev); 6384 if (retval) 6385 return retval; 6386#endif 6387 6388 status = rd32(E1000_STATUS); 6389 if (status & E1000_STATUS_LU) 6390 wufc &= ~E1000_WUFC_LNKC; 6391 6392 if (wufc) { 6393 igb_setup_rctl(adapter); 6394 igb_set_rx_mode(netdev); 6395 6396 /* turn on all-multi mode if wake on multicast is enabled */ 6397 if (wufc & E1000_WUFC_MC) { 6398 rctl = rd32(E1000_RCTL); 6399 rctl |= E1000_RCTL_MPE; 6400 wr32(E1000_RCTL, rctl); 6401 } 6402 6403 ctrl = rd32(E1000_CTRL); 6404 /* advertise wake from D3Cold */ 6405 #define E1000_CTRL_ADVD3WUC 0x00100000 6406 /* phy power management enable */ 6407 #define E1000_CTRL_EN_PHY_PWR_MGMT 0x00200000 6408 ctrl |= E1000_CTRL_ADVD3WUC; 6409 wr32(E1000_CTRL, ctrl); 6410 6411 /* Allow time for pending master requests to run */ 6412 igb_disable_pcie_master(hw); 6413 6414 wr32(E1000_WUC, E1000_WUC_PME_EN); 6415 wr32(E1000_WUFC, wufc); 6416 } else { 6417 wr32(E1000_WUC, 0); 6418 wr32(E1000_WUFC, 0); 6419 } 6420 6421 *enable_wake = wufc || adapter->en_mng_pt; 6422 if (!*enable_wake) 6423 igb_power_down_link(adapter); 6424 else 6425 igb_power_up_link(adapter); 6426 6427 /* Release control of h/w to f/w. If f/w is AMT enabled, this 6428 * would have already happened in close and is redundant. */ 6429 igb_release_hw_control(adapter); 6430 6431 pci_disable_device(pdev); 6432 6433 return 0; 6434} 6435 6436#ifdef CONFIG_PM 6437#ifdef CONFIG_PM_SLEEP 6438static int igb_suspend(struct device *dev) 6439{ 6440 int retval; 6441 bool wake; 6442 struct pci_dev *pdev = to_pci_dev(dev); 6443 6444 retval = __igb_shutdown(pdev, &wake, 0); 6445 if (retval) 6446 return retval; 6447 6448 if (wake) { 6449 pci_prepare_to_sleep(pdev); 6450 } else { 6451 pci_wake_from_d3(pdev, false); 6452 pci_set_power_state(pdev, PCI_D3hot); 6453 } 6454 6455 return 0; 6456} 6457#endif /* CONFIG_PM_SLEEP */ 6458 6459static int igb_resume(struct device *dev) 6460{ 6461 struct pci_dev *pdev = to_pci_dev(dev); 6462 struct net_device *netdev = pci_get_drvdata(pdev); 6463 struct igb_adapter *adapter = netdev_priv(netdev); 6464 struct e1000_hw *hw = &adapter->hw; 6465 u32 err; 6466 6467 pci_set_power_state(pdev, PCI_D0); 6468 pci_restore_state(pdev); 6469 pci_save_state(pdev); 6470 6471 err = pci_enable_device_mem(pdev); 6472 if (err) { 6473 dev_err(&pdev->dev, 6474 "igb: Cannot enable PCI device from suspend\n"); 6475 return err; 6476 } 6477 pci_set_master(pdev); 6478 6479 pci_enable_wake(pdev, PCI_D3hot, 0); 6480 pci_enable_wake(pdev, PCI_D3cold, 0); 6481 6482 if (igb_init_interrupt_scheme(adapter)) { 6483 dev_err(&pdev->dev, "Unable to allocate memory for queues\n"); 6484 return -ENOMEM; 6485 } 6486 6487 igb_reset(adapter); 6488 6489 /* let the f/w know that the h/w is now under the control of the 6490 * driver. */ 6491 igb_get_hw_control(adapter); 6492 6493 wr32(E1000_WUS, ~0); 6494 6495 if (netdev->flags & IFF_UP) { 6496 err = __igb_open(netdev, true); 6497 if (err) 6498 return err; 6499 } 6500 6501 netif_device_attach(netdev); 6502 return 0; 6503} 6504 6505#ifdef CONFIG_PM_RUNTIME 6506static int igb_runtime_idle(struct device *dev) 6507{ 6508 struct pci_dev *pdev = to_pci_dev(dev); 6509 struct net_device *netdev = pci_get_drvdata(pdev); 6510 struct igb_adapter *adapter = netdev_priv(netdev); 6511 6512 if (!igb_has_link(adapter)) 6513 pm_schedule_suspend(dev, MSEC_PER_SEC * 5); 6514 6515 return -EBUSY; 6516} 6517 6518static int igb_runtime_suspend(struct device *dev) 6519{ 6520 struct pci_dev *pdev = to_pci_dev(dev); 6521 int retval; 6522 bool wake; 6523 6524 retval = __igb_shutdown(pdev, &wake, 1); 6525 if (retval) 6526 return retval; 6527 6528 if (wake) { 6529 pci_prepare_to_sleep(pdev); 6530 } else { 6531 pci_wake_from_d3(pdev, false); 6532 pci_set_power_state(pdev, PCI_D3hot); 6533 } 6534 6535 return 0; 6536} 6537 6538static int igb_runtime_resume(struct device *dev) 6539{ 6540 return igb_resume(dev); 6541} 6542#endif /* CONFIG_PM_RUNTIME */ 6543#endif 6544 6545static void igb_shutdown(struct pci_dev *pdev) 6546{ 6547 bool wake; 6548 6549 __igb_shutdown(pdev, &wake, 0); 6550 6551 if (system_state == SYSTEM_POWER_OFF) { 6552 pci_wake_from_d3(pdev, wake); 6553 pci_set_power_state(pdev, PCI_D3hot); 6554 } 6555} 6556 6557#ifdef CONFIG_NET_POLL_CONTROLLER 6558/* 6559 * Polling 'interrupt' - used by things like netconsole to send skbs 6560 * without having to re-enable interrupts. It's not called while 6561 * the interrupt routine is executing. 6562 */ 6563static void igb_netpoll(struct net_device *netdev) 6564{ 6565 struct igb_adapter *adapter = netdev_priv(netdev); 6566 struct e1000_hw *hw = &adapter->hw; 6567 struct igb_q_vector *q_vector; 6568 int i; 6569 6570 for (i = 0; i < adapter->num_q_vectors; i++) { 6571 q_vector = adapter->q_vector[i]; 6572 if (adapter->msix_entries) 6573 wr32(E1000_EIMC, q_vector->eims_value); 6574 else 6575 igb_irq_disable(adapter); 6576 napi_schedule(&q_vector->napi); 6577 } 6578} 6579#endif /* CONFIG_NET_POLL_CONTROLLER */ 6580 6581/** 6582 * igb_io_error_detected - called when PCI error is detected 6583 * @pdev: Pointer to PCI device 6584 * @state: The current pci connection state 6585 * 6586 * This function is called after a PCI bus error affecting 6587 * this device has been detected. 6588 */ 6589static pci_ers_result_t igb_io_error_detected(struct pci_dev *pdev, 6590 pci_channel_state_t state) 6591{ 6592 struct net_device *netdev = pci_get_drvdata(pdev); 6593 struct igb_adapter *adapter = netdev_priv(netdev); 6594 6595 netif_device_detach(netdev); 6596 6597 if (state == pci_channel_io_perm_failure) 6598 return PCI_ERS_RESULT_DISCONNECT; 6599 6600 if (netif_running(netdev)) 6601 igb_down(adapter); 6602 pci_disable_device(pdev); 6603 6604 /* Request a slot slot reset. */ 6605 return PCI_ERS_RESULT_NEED_RESET; 6606} 6607 6608/** 6609 * igb_io_slot_reset - called after the pci bus has been reset. 6610 * @pdev: Pointer to PCI device 6611 * 6612 * Restart the card from scratch, as if from a cold-boot. Implementation 6613 * resembles the first-half of the igb_resume routine. 6614 */ 6615static pci_ers_result_t igb_io_slot_reset(struct pci_dev *pdev) 6616{ 6617 struct net_device *netdev = pci_get_drvdata(pdev); 6618 struct igb_adapter *adapter = netdev_priv(netdev); 6619 struct e1000_hw *hw = &adapter->hw; 6620 pci_ers_result_t result; 6621 int err; 6622 6623 if (pci_enable_device_mem(pdev)) { 6624 dev_err(&pdev->dev, 6625 "Cannot re-enable PCI device after reset.\n"); 6626 result = PCI_ERS_RESULT_DISCONNECT; 6627 } else { 6628 pci_set_master(pdev); 6629 pci_restore_state(pdev); 6630 pci_save_state(pdev); 6631 6632 pci_enable_wake(pdev, PCI_D3hot, 0); 6633 pci_enable_wake(pdev, PCI_D3cold, 0); 6634 6635 igb_reset(adapter); 6636 wr32(E1000_WUS, ~0); 6637 result = PCI_ERS_RESULT_RECOVERED; 6638 } 6639 6640 err = pci_cleanup_aer_uncorrect_error_status(pdev); 6641 if (err) { 6642 dev_err(&pdev->dev, "pci_cleanup_aer_uncorrect_error_status " 6643 "failed 0x%0x\n", err); 6644 /* non-fatal, continue */ 6645 } 6646 6647 return result; 6648} 6649 6650/** 6651 * igb_io_resume - called when traffic can start flowing again. 6652 * @pdev: Pointer to PCI device 6653 * 6654 * This callback is called when the error recovery driver tells us that 6655 * its OK to resume normal operation. Implementation resembles the 6656 * second-half of the igb_resume routine. 6657 */ 6658static void igb_io_resume(struct pci_dev *pdev) 6659{ 6660 struct net_device *netdev = pci_get_drvdata(pdev); 6661 struct igb_adapter *adapter = netdev_priv(netdev); 6662 6663 if (netif_running(netdev)) { 6664 if (igb_up(adapter)) { 6665 dev_err(&pdev->dev, "igb_up failed after reset\n"); 6666 return; 6667 } 6668 } 6669 6670 netif_device_attach(netdev); 6671 6672 /* let the f/w know that the h/w is now under the control of the 6673 * driver. */ 6674 igb_get_hw_control(adapter); 6675} 6676 6677static void igb_rar_set_qsel(struct igb_adapter *adapter, u8 *addr, u32 index, 6678 u8 qsel) 6679{ 6680 u32 rar_low, rar_high; 6681 struct e1000_hw *hw = &adapter->hw; 6682 6683 /* HW expects these in little endian so we reverse the byte order 6684 * from network order (big endian) to little endian 6685 */ 6686 rar_low = ((u32) addr[0] | ((u32) addr[1] << 8) | 6687 ((u32) addr[2] << 16) | ((u32) addr[3] << 24)); 6688 rar_high = ((u32) addr[4] | ((u32) addr[5] << 8)); 6689 6690 /* Indicate to hardware the Address is Valid. */ 6691 rar_high |= E1000_RAH_AV; 6692 6693 if (hw->mac.type == e1000_82575) 6694 rar_high |= E1000_RAH_POOL_1 * qsel; 6695 else 6696 rar_high |= E1000_RAH_POOL_1 << qsel; 6697 6698 wr32(E1000_RAL(index), rar_low); 6699 wrfl(); 6700 wr32(E1000_RAH(index), rar_high); 6701 wrfl(); 6702} 6703 6704static int igb_set_vf_mac(struct igb_adapter *adapter, 6705 int vf, unsigned char *mac_addr) 6706{ 6707 struct e1000_hw *hw = &adapter->hw; 6708 /* VF MAC addresses start at end of receive addresses and moves 6709 * torwards the first, as a result a collision should not be possible */ 6710 int rar_entry = hw->mac.rar_entry_count - (vf + 1); 6711 6712 memcpy(adapter->vf_data[vf].vf_mac_addresses, mac_addr, ETH_ALEN); 6713 6714 igb_rar_set_qsel(adapter, mac_addr, rar_entry, vf); 6715 6716 return 0; 6717} 6718 6719static int igb_ndo_set_vf_mac(struct net_device *netdev, int vf, u8 *mac) 6720{ 6721 struct igb_adapter *adapter = netdev_priv(netdev); 6722 if (!is_valid_ether_addr(mac) || (vf >= adapter->vfs_allocated_count)) 6723 return -EINVAL; 6724 adapter->vf_data[vf].flags |= IGB_VF_FLAG_PF_SET_MAC; 6725 dev_info(&adapter->pdev->dev, "setting MAC %pM on VF %d\n", mac, vf); 6726 dev_info(&adapter->pdev->dev, "Reload the VF driver to make this" 6727 " change effective."); 6728 if (test_bit(__IGB_DOWN, &adapter->state)) { 6729 dev_warn(&adapter->pdev->dev, "The VF MAC address has been set," 6730 " but the PF device is not up.\n"); 6731 dev_warn(&adapter->pdev->dev, "Bring the PF device up before" 6732 " attempting to use the VF device.\n"); 6733 } 6734 return igb_set_vf_mac(adapter, vf, mac); 6735} 6736 6737static int igb_link_mbps(int internal_link_speed) 6738{ 6739 switch (internal_link_speed) { 6740 case SPEED_100: 6741 return 100; 6742 case SPEED_1000: 6743 return 1000; 6744 default: 6745 return 0; 6746 } 6747} 6748 6749static void igb_set_vf_rate_limit(struct e1000_hw *hw, int vf, int tx_rate, 6750 int link_speed) 6751{ 6752 int rf_dec, rf_int; 6753 u32 bcnrc_val; 6754 6755 if (tx_rate != 0) { 6756 /* Calculate the rate factor values to set */ 6757 rf_int = link_speed / tx_rate; 6758 rf_dec = (link_speed - (rf_int * tx_rate)); 6759 rf_dec = (rf_dec * (1<<E1000_RTTBCNRC_RF_INT_SHIFT)) / tx_rate; 6760 6761 bcnrc_val = E1000_RTTBCNRC_RS_ENA; 6762 bcnrc_val |= ((rf_int<<E1000_RTTBCNRC_RF_INT_SHIFT) & 6763 E1000_RTTBCNRC_RF_INT_MASK); 6764 bcnrc_val |= (rf_dec & E1000_RTTBCNRC_RF_DEC_MASK); 6765 } else { 6766 bcnrc_val = 0; 6767 } 6768 6769 wr32(E1000_RTTDQSEL, vf); /* vf X uses queue X */ 6770 /* 6771 * Set global transmit compensation time to the MMW_SIZE in RTTBCNRM 6772 * register. MMW_SIZE=0x014 if 9728-byte jumbo is supported. 6773 */ 6774 wr32(E1000_RTTBCNRM, 0x14); 6775 wr32(E1000_RTTBCNRC, bcnrc_val); 6776} 6777 6778static void igb_check_vf_rate_limit(struct igb_adapter *adapter) 6779{ 6780 int actual_link_speed, i; 6781 bool reset_rate = false; 6782 6783 /* VF TX rate limit was not set or not supported */ 6784 if ((adapter->vf_rate_link_speed == 0) || 6785 (adapter->hw.mac.type != e1000_82576)) 6786 return; 6787 6788 actual_link_speed = igb_link_mbps(adapter->link_speed); 6789 if (actual_link_speed != adapter->vf_rate_link_speed) { 6790 reset_rate = true; 6791 adapter->vf_rate_link_speed = 0; 6792 dev_info(&adapter->pdev->dev, 6793 "Link speed has been changed. VF Transmit " 6794 "rate is disabled\n"); 6795 } 6796 6797 for (i = 0; i < adapter->vfs_allocated_count; i++) { 6798 if (reset_rate) 6799 adapter->vf_data[i].tx_rate = 0; 6800 6801 igb_set_vf_rate_limit(&adapter->hw, i, 6802 adapter->vf_data[i].tx_rate, 6803 actual_link_speed); 6804 } 6805} 6806 6807static int igb_ndo_set_vf_bw(struct net_device *netdev, int vf, int tx_rate) 6808{ 6809 struct igb_adapter *adapter = netdev_priv(netdev); 6810 struct e1000_hw *hw = &adapter->hw; 6811 int actual_link_speed; 6812 6813 if (hw->mac.type != e1000_82576) 6814 return -EOPNOTSUPP; 6815 6816 actual_link_speed = igb_link_mbps(adapter->link_speed); 6817 if ((vf >= adapter->vfs_allocated_count) || 6818 (!(rd32(E1000_STATUS) & E1000_STATUS_LU)) || 6819 (tx_rate < 0) || (tx_rate > actual_link_speed)) 6820 return -EINVAL; 6821 6822 adapter->vf_rate_link_speed = actual_link_speed; 6823 adapter->vf_data[vf].tx_rate = (u16)tx_rate; 6824 igb_set_vf_rate_limit(hw, vf, tx_rate, actual_link_speed); 6825 6826 return 0; 6827} 6828 6829static int igb_ndo_get_vf_config(struct net_device *netdev, 6830 int vf, struct ifla_vf_info *ivi) 6831{ 6832 struct igb_adapter *adapter = netdev_priv(netdev); 6833 if (vf >= adapter->vfs_allocated_count) 6834 return -EINVAL; 6835 ivi->vf = vf; 6836 memcpy(&ivi->mac, adapter->vf_data[vf].vf_mac_addresses, ETH_ALEN); 6837 ivi->tx_rate = adapter->vf_data[vf].tx_rate; 6838 ivi->vlan = adapter->vf_data[vf].pf_vlan; 6839 ivi->qos = adapter->vf_data[vf].pf_qos; 6840 return 0; 6841} 6842 6843static void igb_vmm_control(struct igb_adapter *adapter) 6844{ 6845 struct e1000_hw *hw = &adapter->hw; 6846 u32 reg; 6847 6848 switch (hw->mac.type) { 6849 case e1000_82575: 6850 case e1000_i210: 6851 case e1000_i211: 6852 default: 6853 /* replication is not supported for 82575 */ 6854 return; 6855 case e1000_82576: 6856 /* notify HW that the MAC is adding vlan tags */ 6857 reg = rd32(E1000_DTXCTL); 6858 reg |= E1000_DTXCTL_VLAN_ADDED; 6859 wr32(E1000_DTXCTL, reg); 6860 case e1000_82580: 6861 /* enable replication vlan tag stripping */ 6862 reg = rd32(E1000_RPLOLR); 6863 reg |= E1000_RPLOLR_STRVLAN; 6864 wr32(E1000_RPLOLR, reg); 6865 case e1000_i350: 6866 /* none of the above registers are supported by i350 */ 6867 break; 6868 } 6869 6870 if (adapter->vfs_allocated_count) { 6871 igb_vmdq_set_loopback_pf(hw, true); 6872 igb_vmdq_set_replication_pf(hw, true); 6873 igb_vmdq_set_anti_spoofing_pf(hw, true, 6874 adapter->vfs_allocated_count); 6875 } else { 6876 igb_vmdq_set_loopback_pf(hw, false); 6877 igb_vmdq_set_replication_pf(hw, false); 6878 } 6879} 6880 6881static void igb_init_dmac(struct igb_adapter *adapter, u32 pba) 6882{ 6883 struct e1000_hw *hw = &adapter->hw; 6884 u32 dmac_thr; 6885 u16 hwm; 6886 6887 if (hw->mac.type > e1000_82580) { 6888 if (adapter->flags & IGB_FLAG_DMAC) { 6889 u32 reg; 6890 6891 /* force threshold to 0. */ 6892 wr32(E1000_DMCTXTH, 0); 6893 6894 /* 6895 * DMA Coalescing high water mark needs to be greater 6896 * than the Rx threshold. Set hwm to PBA - max frame 6897 * size in 16B units, capping it at PBA - 6KB. 6898 */ 6899 hwm = 64 * pba - adapter->max_frame_size / 16; 6900 if (hwm < 64 * (pba - 6)) 6901 hwm = 64 * (pba - 6); 6902 reg = rd32(E1000_FCRTC); 6903 reg &= ~E1000_FCRTC_RTH_COAL_MASK; 6904 reg |= ((hwm << E1000_FCRTC_RTH_COAL_SHIFT) 6905 & E1000_FCRTC_RTH_COAL_MASK); 6906 wr32(E1000_FCRTC, reg); 6907 6908 /* 6909 * Set the DMA Coalescing Rx threshold to PBA - 2 * max 6910 * frame size, capping it at PBA - 10KB. 6911 */ 6912 dmac_thr = pba - adapter->max_frame_size / 512; 6913 if (dmac_thr < pba - 10) 6914 dmac_thr = pba - 10; 6915 reg = rd32(E1000_DMACR); 6916 reg &= ~E1000_DMACR_DMACTHR_MASK; 6917 reg |= ((dmac_thr << E1000_DMACR_DMACTHR_SHIFT) 6918 & E1000_DMACR_DMACTHR_MASK); 6919 6920 /* transition to L0x or L1 if available..*/ 6921 reg |= (E1000_DMACR_DMAC_EN | E1000_DMACR_DMAC_LX_MASK); 6922 6923 /* watchdog timer= +-1000 usec in 32usec intervals */ 6924 reg |= (1000 >> 5); 6925 6926 /* Disable BMC-to-OS Watchdog Enable */ 6927 reg &= ~E1000_DMACR_DC_BMC2OSW_EN; 6928 wr32(E1000_DMACR, reg); 6929 6930 /* 6931 * no lower threshold to disable 6932 * coalescing(smart fifb)-UTRESH=0 6933 */ 6934 wr32(E1000_DMCRTRH, 0); 6935 6936 reg = (IGB_DMCTLX_DCFLUSH_DIS | 0x4); 6937 6938 wr32(E1000_DMCTLX, reg); 6939 6940 /* 6941 * free space in tx packet buffer to wake from 6942 * DMA coal 6943 */ 6944 wr32(E1000_DMCTXTH, (IGB_MIN_TXPBSIZE - 6945 (IGB_TX_BUF_4096 + adapter->max_frame_size)) >> 6); 6946 6947 /* 6948 * make low power state decision controlled 6949 * by DMA coal 6950 */ 6951 reg = rd32(E1000_PCIEMISC); 6952 reg &= ~E1000_PCIEMISC_LX_DECISION; 6953 wr32(E1000_PCIEMISC, reg); 6954 } /* endif adapter->dmac is not disabled */ 6955 } else if (hw->mac.type == e1000_82580) { 6956 u32 reg = rd32(E1000_PCIEMISC); 6957 wr32(E1000_PCIEMISC, reg & ~E1000_PCIEMISC_LX_DECISION); 6958 wr32(E1000_DMACR, 0); 6959 } 6960} 6961 6962/* igb_main.c */ 6963