1 /* Intel(R) Gigabit Ethernet Linux driver 2 * Copyright(c) 2007-2014 Intel Corporation. 3 * 4 * This program is free software; you can redistribute it and/or modify it 5 * under the terms and conditions of the GNU General Public License, 6 * version 2, as published by the Free Software Foundation. 7 * 8 * This program is distributed in the hope it will be useful, but WITHOUT 9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 11 * more details. 12 * 13 * You should have received a copy of the GNU General Public License along with 14 * this program; if not, see <http://www.gnu.org/licenses/>. 15 * 16 * The full GNU General Public License is included in this distribution in 17 * the file called "COPYING". 18 * 19 * Contact Information: 20 * e1000-devel Mailing List <e1000-devel@lists.sourceforge.net> 21 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 22 */ 23 24 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 25 26 #include <linux/module.h> 27 #include <linux/types.h> 28 #include <linux/init.h> 29 #include <linux/bitops.h> 30 #include <linux/vmalloc.h> 31 #include <linux/pagemap.h> 32 #include <linux/netdevice.h> 33 #include <linux/ipv6.h> 34 #include <linux/slab.h> 35 #include <net/checksum.h> 36 #include <net/ip6_checksum.h> 37 #include <linux/net_tstamp.h> 38 #include <linux/mii.h> 39 #include <linux/ethtool.h> 40 #include <linux/if.h> 41 #include <linux/if_vlan.h> 42 #include <linux/pci.h> 43 #include <linux/pci-aspm.h> 44 #include <linux/delay.h> 45 #include <linux/interrupt.h> 46 #include <linux/ip.h> 47 #include <linux/tcp.h> 48 #include <linux/sctp.h> 49 #include <linux/if_ether.h> 50 #include <linux/aer.h> 51 #include <linux/prefetch.h> 52 #include <linux/pm_runtime.h> 53 #include <linux/etherdevice.h> 54 #ifdef CONFIG_IGB_DCA 55 #include <linux/dca.h> 56 #endif 57 #include <linux/i2c.h> 58 #include "igb.h" 59 60 #define MAJ 5 61 #define MIN 4 62 #define BUILD 0 63 #define DRV_VERSION __stringify(MAJ) "." __stringify(MIN) "." \ 64 __stringify(BUILD) "-k" 65 char igb_driver_name[] = "igb"; 66 char igb_driver_version[] = DRV_VERSION; 67 static const char igb_driver_string[] = 68 "Intel(R) Gigabit Ethernet Network Driver"; 69 static const char igb_copyright[] = 70 "Copyright (c) 2007-2014 Intel Corporation."; 71 72 static const struct e1000_info *igb_info_tbl[] = { 73 [board_82575] = &e1000_82575_info, 74 }; 75 76 static const struct pci_device_id igb_pci_tbl[] = { 77 { PCI_VDEVICE(INTEL, E1000_DEV_ID_I354_BACKPLANE_1GBPS) }, 78 { PCI_VDEVICE(INTEL, E1000_DEV_ID_I354_SGMII) }, 79 { PCI_VDEVICE(INTEL, E1000_DEV_ID_I354_BACKPLANE_2_5GBPS) }, 80 { PCI_VDEVICE(INTEL, E1000_DEV_ID_I211_COPPER), board_82575 }, 81 { PCI_VDEVICE(INTEL, E1000_DEV_ID_I210_COPPER), board_82575 }, 82 { PCI_VDEVICE(INTEL, E1000_DEV_ID_I210_FIBER), board_82575 }, 83 { PCI_VDEVICE(INTEL, E1000_DEV_ID_I210_SERDES), board_82575 }, 84 { PCI_VDEVICE(INTEL, E1000_DEV_ID_I210_SGMII), board_82575 }, 85 { PCI_VDEVICE(INTEL, E1000_DEV_ID_I210_COPPER_FLASHLESS), board_82575 }, 86 { PCI_VDEVICE(INTEL, E1000_DEV_ID_I210_SERDES_FLASHLESS), board_82575 }, 87 { PCI_VDEVICE(INTEL, E1000_DEV_ID_I350_COPPER), board_82575 }, 88 { PCI_VDEVICE(INTEL, E1000_DEV_ID_I350_FIBER), board_82575 }, 89 { PCI_VDEVICE(INTEL, E1000_DEV_ID_I350_SERDES), board_82575 }, 90 { PCI_VDEVICE(INTEL, E1000_DEV_ID_I350_SGMII), board_82575 }, 91 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82580_COPPER), board_82575 }, 92 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82580_FIBER), board_82575 }, 93 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82580_QUAD_FIBER), board_82575 }, 94 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82580_SERDES), board_82575 }, 95 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82580_SGMII), board_82575 }, 96 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82580_COPPER_DUAL), board_82575 }, 97 { PCI_VDEVICE(INTEL, E1000_DEV_ID_DH89XXCC_SGMII), board_82575 }, 98 { PCI_VDEVICE(INTEL, E1000_DEV_ID_DH89XXCC_SERDES), board_82575 }, 99 { PCI_VDEVICE(INTEL, E1000_DEV_ID_DH89XXCC_BACKPLANE), board_82575 }, 100 { PCI_VDEVICE(INTEL, E1000_DEV_ID_DH89XXCC_SFP), board_82575 }, 101 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82576), board_82575 }, 102 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82576_NS), board_82575 }, 103 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82576_NS_SERDES), board_82575 }, 104 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82576_FIBER), board_82575 }, 105 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82576_SERDES), board_82575 }, 106 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82576_SERDES_QUAD), board_82575 }, 107 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82576_QUAD_COPPER_ET2), board_82575 }, 108 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82576_QUAD_COPPER), board_82575 }, 109 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82575EB_COPPER), board_82575 }, 110 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82575EB_FIBER_SERDES), board_82575 }, 111 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82575GB_QUAD_COPPER), board_82575 }, 112 /* required last entry */ 113 {0, } 114 }; 115 116 MODULE_DEVICE_TABLE(pci, igb_pci_tbl); 117 118 static int igb_setup_all_tx_resources(struct igb_adapter *); 119 static int igb_setup_all_rx_resources(struct igb_adapter *); 120 static void igb_free_all_tx_resources(struct igb_adapter *); 121 static void igb_free_all_rx_resources(struct igb_adapter *); 122 static void igb_setup_mrqc(struct igb_adapter *); 123 static int igb_probe(struct pci_dev *, const struct pci_device_id *); 124 static void igb_remove(struct pci_dev *pdev); 125 static int igb_sw_init(struct igb_adapter *); 126 int igb_open(struct net_device *); 127 int igb_close(struct net_device *); 128 static void igb_configure(struct igb_adapter *); 129 static void igb_configure_tx(struct igb_adapter *); 130 static void igb_configure_rx(struct igb_adapter *); 131 static void igb_clean_all_tx_rings(struct igb_adapter *); 132 static void igb_clean_all_rx_rings(struct igb_adapter *); 133 static void igb_clean_tx_ring(struct igb_ring *); 134 static void igb_clean_rx_ring(struct igb_ring *); 135 static void igb_set_rx_mode(struct net_device *); 136 static void igb_update_phy_info(unsigned long); 137 static void igb_watchdog(unsigned long); 138 static void igb_watchdog_task(struct work_struct *); 139 static netdev_tx_t igb_xmit_frame(struct sk_buff *skb, struct net_device *); 140 static void igb_get_stats64(struct net_device *dev, 141 struct rtnl_link_stats64 *stats); 142 static int igb_change_mtu(struct net_device *, int); 143 static int igb_set_mac(struct net_device *, void *); 144 static void igb_set_uta(struct igb_adapter *adapter, bool set); 145 static irqreturn_t igb_intr(int irq, void *); 146 static irqreturn_t igb_intr_msi(int irq, void *); 147 static irqreturn_t igb_msix_other(int irq, void *); 148 static irqreturn_t igb_msix_ring(int irq, void *); 149 #ifdef CONFIG_IGB_DCA 150 static void igb_update_dca(struct igb_q_vector *); 151 static void igb_setup_dca(struct igb_adapter *); 152 #endif /* CONFIG_IGB_DCA */ 153 static int igb_poll(struct napi_struct *, int); 154 static bool igb_clean_tx_irq(struct igb_q_vector *, int); 155 static int igb_clean_rx_irq(struct igb_q_vector *, int); 156 static int igb_ioctl(struct net_device *, struct ifreq *, int cmd); 157 static void igb_tx_timeout(struct net_device *); 158 static void igb_reset_task(struct work_struct *); 159 static void igb_vlan_mode(struct net_device *netdev, 160 netdev_features_t features); 161 static int igb_vlan_rx_add_vid(struct net_device *, __be16, u16); 162 static int igb_vlan_rx_kill_vid(struct net_device *, __be16, u16); 163 static void igb_restore_vlan(struct igb_adapter *); 164 static void igb_rar_set_qsel(struct igb_adapter *, u8 *, u32 , u8); 165 static void igb_ping_all_vfs(struct igb_adapter *); 166 static void igb_msg_task(struct igb_adapter *); 167 static void igb_vmm_control(struct igb_adapter *); 168 static int igb_set_vf_mac(struct igb_adapter *, int, unsigned char *); 169 static void igb_restore_vf_multicasts(struct igb_adapter *adapter); 170 static int igb_ndo_set_vf_mac(struct net_device *netdev, int vf, u8 *mac); 171 static int igb_ndo_set_vf_vlan(struct net_device *netdev, 172 int vf, u16 vlan, u8 qos, __be16 vlan_proto); 173 static int igb_ndo_set_vf_bw(struct net_device *, int, int, int); 174 static int igb_ndo_set_vf_spoofchk(struct net_device *netdev, int vf, 175 bool setting); 176 static int igb_ndo_get_vf_config(struct net_device *netdev, int vf, 177 struct ifla_vf_info *ivi); 178 static void igb_check_vf_rate_limit(struct igb_adapter *); 179 static void igb_nfc_filter_exit(struct igb_adapter *adapter); 180 static void igb_nfc_filter_restore(struct igb_adapter *adapter); 181 182 #ifdef CONFIG_PCI_IOV 183 static int igb_vf_configure(struct igb_adapter *adapter, int vf); 184 static int igb_pci_enable_sriov(struct pci_dev *dev, int num_vfs); 185 static int igb_disable_sriov(struct pci_dev *dev); 186 static int igb_pci_disable_sriov(struct pci_dev *dev); 187 #endif 188 189 #ifdef CONFIG_PM 190 #ifdef CONFIG_PM_SLEEP 191 static int igb_suspend(struct device *); 192 #endif 193 static int igb_resume(struct device *); 194 static int igb_runtime_suspend(struct device *dev); 195 static int igb_runtime_resume(struct device *dev); 196 static int igb_runtime_idle(struct device *dev); 197 static const struct dev_pm_ops igb_pm_ops = { 198 SET_SYSTEM_SLEEP_PM_OPS(igb_suspend, igb_resume) 199 SET_RUNTIME_PM_OPS(igb_runtime_suspend, igb_runtime_resume, 200 igb_runtime_idle) 201 }; 202 #endif 203 static void igb_shutdown(struct pci_dev *); 204 static int igb_pci_sriov_configure(struct pci_dev *dev, int num_vfs); 205 #ifdef CONFIG_IGB_DCA 206 static int igb_notify_dca(struct notifier_block *, unsigned long, void *); 207 static struct notifier_block dca_notifier = { 208 .notifier_call = igb_notify_dca, 209 .next = NULL, 210 .priority = 0 211 }; 212 #endif 213 #ifdef CONFIG_NET_POLL_CONTROLLER 214 /* for netdump / net console */ 215 static void igb_netpoll(struct net_device *); 216 #endif 217 #ifdef CONFIG_PCI_IOV 218 static unsigned int max_vfs; 219 module_param(max_vfs, uint, 0); 220 MODULE_PARM_DESC(max_vfs, "Maximum number of virtual functions to allocate per physical function"); 221 #endif /* CONFIG_PCI_IOV */ 222 223 static pci_ers_result_t igb_io_error_detected(struct pci_dev *, 224 pci_channel_state_t); 225 static pci_ers_result_t igb_io_slot_reset(struct pci_dev *); 226 static void igb_io_resume(struct pci_dev *); 227 228 static const struct pci_error_handlers igb_err_handler = { 229 .error_detected = igb_io_error_detected, 230 .slot_reset = igb_io_slot_reset, 231 .resume = igb_io_resume, 232 }; 233 234 static void igb_init_dmac(struct igb_adapter *adapter, u32 pba); 235 236 static struct pci_driver igb_driver = { 237 .name = igb_driver_name, 238 .id_table = igb_pci_tbl, 239 .probe = igb_probe, 240 .remove = igb_remove, 241 #ifdef CONFIG_PM 242 .driver.pm = &igb_pm_ops, 243 #endif 244 .shutdown = igb_shutdown, 245 .sriov_configure = igb_pci_sriov_configure, 246 .err_handler = &igb_err_handler 247 }; 248 249 MODULE_AUTHOR("Intel Corporation, <e1000-devel@lists.sourceforge.net>"); 250 MODULE_DESCRIPTION("Intel(R) Gigabit Ethernet Network Driver"); 251 MODULE_LICENSE("GPL"); 252 MODULE_VERSION(DRV_VERSION); 253 254 #define DEFAULT_MSG_ENABLE (NETIF_MSG_DRV|NETIF_MSG_PROBE|NETIF_MSG_LINK) 255 static int debug = -1; 256 module_param(debug, int, 0); 257 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)"); 258 259 struct igb_reg_info { 260 u32 ofs; 261 char *name; 262 }; 263 264 static const struct igb_reg_info igb_reg_info_tbl[] = { 265 266 /* General Registers */ 267 {E1000_CTRL, "CTRL"}, 268 {E1000_STATUS, "STATUS"}, 269 {E1000_CTRL_EXT, "CTRL_EXT"}, 270 271 /* Interrupt Registers */ 272 {E1000_ICR, "ICR"}, 273 274 /* RX Registers */ 275 {E1000_RCTL, "RCTL"}, 276 {E1000_RDLEN(0), "RDLEN"}, 277 {E1000_RDH(0), "RDH"}, 278 {E1000_RDT(0), "RDT"}, 279 {E1000_RXDCTL(0), "RXDCTL"}, 280 {E1000_RDBAL(0), "RDBAL"}, 281 {E1000_RDBAH(0), "RDBAH"}, 282 283 /* TX Registers */ 284 {E1000_TCTL, "TCTL"}, 285 {E1000_TDBAL(0), "TDBAL"}, 286 {E1000_TDBAH(0), "TDBAH"}, 287 {E1000_TDLEN(0), "TDLEN"}, 288 {E1000_TDH(0), "TDH"}, 289 {E1000_TDT(0), "TDT"}, 290 {E1000_TXDCTL(0), "TXDCTL"}, 291 {E1000_TDFH, "TDFH"}, 292 {E1000_TDFT, "TDFT"}, 293 {E1000_TDFHS, "TDFHS"}, 294 {E1000_TDFPC, "TDFPC"}, 295 296 /* List Terminator */ 297 {} 298 }; 299 300 /* igb_regdump - register printout routine */ 301 static void igb_regdump(struct e1000_hw *hw, struct igb_reg_info *reginfo) 302 { 303 int n = 0; 304 char rname[16]; 305 u32 regs[8]; 306 307 switch (reginfo->ofs) { 308 case E1000_RDLEN(0): 309 for (n = 0; n < 4; n++) 310 regs[n] = rd32(E1000_RDLEN(n)); 311 break; 312 case E1000_RDH(0): 313 for (n = 0; n < 4; n++) 314 regs[n] = rd32(E1000_RDH(n)); 315 break; 316 case E1000_RDT(0): 317 for (n = 0; n < 4; n++) 318 regs[n] = rd32(E1000_RDT(n)); 319 break; 320 case E1000_RXDCTL(0): 321 for (n = 0; n < 4; n++) 322 regs[n] = rd32(E1000_RXDCTL(n)); 323 break; 324 case E1000_RDBAL(0): 325 for (n = 0; n < 4; n++) 326 regs[n] = rd32(E1000_RDBAL(n)); 327 break; 328 case E1000_RDBAH(0): 329 for (n = 0; n < 4; n++) 330 regs[n] = rd32(E1000_RDBAH(n)); 331 break; 332 case E1000_TDBAL(0): 333 for (n = 0; n < 4; n++) 334 regs[n] = rd32(E1000_RDBAL(n)); 335 break; 336 case E1000_TDBAH(0): 337 for (n = 0; n < 4; n++) 338 regs[n] = rd32(E1000_TDBAH(n)); 339 break; 340 case E1000_TDLEN(0): 341 for (n = 0; n < 4; n++) 342 regs[n] = rd32(E1000_TDLEN(n)); 343 break; 344 case E1000_TDH(0): 345 for (n = 0; n < 4; n++) 346 regs[n] = rd32(E1000_TDH(n)); 347 break; 348 case E1000_TDT(0): 349 for (n = 0; n < 4; n++) 350 regs[n] = rd32(E1000_TDT(n)); 351 break; 352 case E1000_TXDCTL(0): 353 for (n = 0; n < 4; n++) 354 regs[n] = rd32(E1000_TXDCTL(n)); 355 break; 356 default: 357 pr_info("%-15s %08x\n", reginfo->name, rd32(reginfo->ofs)); 358 return; 359 } 360 361 snprintf(rname, 16, "%s%s", reginfo->name, "[0-3]"); 362 pr_info("%-15s %08x %08x %08x %08x\n", rname, regs[0], regs[1], 363 regs[2], regs[3]); 364 } 365 366 /* igb_dump - Print registers, Tx-rings and Rx-rings */ 367 static void igb_dump(struct igb_adapter *adapter) 368 { 369 struct net_device *netdev = adapter->netdev; 370 struct e1000_hw *hw = &adapter->hw; 371 struct igb_reg_info *reginfo; 372 struct igb_ring *tx_ring; 373 union e1000_adv_tx_desc *tx_desc; 374 struct my_u0 { u64 a; u64 b; } *u0; 375 struct igb_ring *rx_ring; 376 union e1000_adv_rx_desc *rx_desc; 377 u32 staterr; 378 u16 i, n; 379 380 if (!netif_msg_hw(adapter)) 381 return; 382 383 /* Print netdevice Info */ 384 if (netdev) { 385 dev_info(&adapter->pdev->dev, "Net device Info\n"); 386 pr_info("Device Name state trans_start\n"); 387 pr_info("%-15s %016lX %016lX\n", netdev->name, 388 netdev->state, dev_trans_start(netdev)); 389 } 390 391 /* Print Registers */ 392 dev_info(&adapter->pdev->dev, "Register Dump\n"); 393 pr_info(" Register Name Value\n"); 394 for (reginfo = (struct igb_reg_info *)igb_reg_info_tbl; 395 reginfo->name; reginfo++) { 396 igb_regdump(hw, reginfo); 397 } 398 399 /* Print TX Ring Summary */ 400 if (!netdev || !netif_running(netdev)) 401 goto exit; 402 403 dev_info(&adapter->pdev->dev, "TX Rings Summary\n"); 404 pr_info("Queue [NTU] [NTC] [bi(ntc)->dma ] leng ntw timestamp\n"); 405 for (n = 0; n < adapter->num_tx_queues; n++) { 406 struct igb_tx_buffer *buffer_info; 407 tx_ring = adapter->tx_ring[n]; 408 buffer_info = &tx_ring->tx_buffer_info[tx_ring->next_to_clean]; 409 pr_info(" %5d %5X %5X %016llX %04X %p %016llX\n", 410 n, tx_ring->next_to_use, tx_ring->next_to_clean, 411 (u64)dma_unmap_addr(buffer_info, dma), 412 dma_unmap_len(buffer_info, len), 413 buffer_info->next_to_watch, 414 (u64)buffer_info->time_stamp); 415 } 416 417 /* Print TX Rings */ 418 if (!netif_msg_tx_done(adapter)) 419 goto rx_ring_summary; 420 421 dev_info(&adapter->pdev->dev, "TX Rings Dump\n"); 422 423 /* Transmit Descriptor Formats 424 * 425 * Advanced Transmit Descriptor 426 * +--------------------------------------------------------------+ 427 * 0 | Buffer Address [63:0] | 428 * +--------------------------------------------------------------+ 429 * 8 | PAYLEN | PORTS |CC|IDX | STA | DCMD |DTYP|MAC|RSV| DTALEN | 430 * +--------------------------------------------------------------+ 431 * 63 46 45 40 39 38 36 35 32 31 24 15 0 432 */ 433 434 for (n = 0; n < adapter->num_tx_queues; n++) { 435 tx_ring = adapter->tx_ring[n]; 436 pr_info("------------------------------------\n"); 437 pr_info("TX QUEUE INDEX = %d\n", tx_ring->queue_index); 438 pr_info("------------------------------------\n"); 439 pr_info("T [desc] [address 63:0 ] [PlPOCIStDDM Ln] [bi->dma ] leng ntw timestamp bi->skb\n"); 440 441 for (i = 0; tx_ring->desc && (i < tx_ring->count); i++) { 442 const char *next_desc; 443 struct igb_tx_buffer *buffer_info; 444 tx_desc = IGB_TX_DESC(tx_ring, i); 445 buffer_info = &tx_ring->tx_buffer_info[i]; 446 u0 = (struct my_u0 *)tx_desc; 447 if (i == tx_ring->next_to_use && 448 i == tx_ring->next_to_clean) 449 next_desc = " NTC/U"; 450 else if (i == tx_ring->next_to_use) 451 next_desc = " NTU"; 452 else if (i == tx_ring->next_to_clean) 453 next_desc = " NTC"; 454 else 455 next_desc = ""; 456 457 pr_info("T [0x%03X] %016llX %016llX %016llX %04X %p %016llX %p%s\n", 458 i, le64_to_cpu(u0->a), 459 le64_to_cpu(u0->b), 460 (u64)dma_unmap_addr(buffer_info, dma), 461 dma_unmap_len(buffer_info, len), 462 buffer_info->next_to_watch, 463 (u64)buffer_info->time_stamp, 464 buffer_info->skb, next_desc); 465 466 if (netif_msg_pktdata(adapter) && buffer_info->skb) 467 print_hex_dump(KERN_INFO, "", 468 DUMP_PREFIX_ADDRESS, 469 16, 1, buffer_info->skb->data, 470 dma_unmap_len(buffer_info, len), 471 true); 472 } 473 } 474 475 /* Print RX Rings Summary */ 476 rx_ring_summary: 477 dev_info(&adapter->pdev->dev, "RX Rings Summary\n"); 478 pr_info("Queue [NTU] [NTC]\n"); 479 for (n = 0; n < adapter->num_rx_queues; n++) { 480 rx_ring = adapter->rx_ring[n]; 481 pr_info(" %5d %5X %5X\n", 482 n, rx_ring->next_to_use, rx_ring->next_to_clean); 483 } 484 485 /* Print RX Rings */ 486 if (!netif_msg_rx_status(adapter)) 487 goto exit; 488 489 dev_info(&adapter->pdev->dev, "RX Rings Dump\n"); 490 491 /* Advanced Receive Descriptor (Read) Format 492 * 63 1 0 493 * +-----------------------------------------------------+ 494 * 0 | Packet Buffer Address [63:1] |A0/NSE| 495 * +----------------------------------------------+------+ 496 * 8 | Header Buffer Address [63:1] | DD | 497 * +-----------------------------------------------------+ 498 * 499 * 500 * Advanced Receive Descriptor (Write-Back) Format 501 * 502 * 63 48 47 32 31 30 21 20 17 16 4 3 0 503 * +------------------------------------------------------+ 504 * 0 | Packet IP |SPH| HDR_LEN | RSV|Packet| RSS | 505 * | Checksum Ident | | | | Type | Type | 506 * +------------------------------------------------------+ 507 * 8 | VLAN Tag | Length | Extended Error | Extended Status | 508 * +------------------------------------------------------+ 509 * 63 48 47 32 31 20 19 0 510 */ 511 512 for (n = 0; n < adapter->num_rx_queues; n++) { 513 rx_ring = adapter->rx_ring[n]; 514 pr_info("------------------------------------\n"); 515 pr_info("RX QUEUE INDEX = %d\n", rx_ring->queue_index); 516 pr_info("------------------------------------\n"); 517 pr_info("R [desc] [ PktBuf A0] [ HeadBuf DD] [bi->dma ] [bi->skb] <-- Adv Rx Read format\n"); 518 pr_info("RWB[desc] [PcsmIpSHl PtRs] [vl er S cks ln] ---------------- [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 ---------------- %s\n", 538 "RWB", i, 539 le64_to_cpu(u0->a), 540 le64_to_cpu(u0->b), 541 next_desc); 542 } else { 543 pr_info("%s[0x%03X] %016llX %016llX %016llX %s\n", 544 "R ", i, 545 le64_to_cpu(u0->a), 546 le64_to_cpu(u0->b), 547 (u64)buffer_info->dma, 548 next_desc); 549 550 if (netif_msg_pktdata(adapter) && 551 buffer_info->dma && buffer_info->page) { 552 print_hex_dump(KERN_INFO, "", 553 DUMP_PREFIX_ADDRESS, 554 16, 1, 555 page_address(buffer_info->page) + 556 buffer_info->page_offset, 557 IGB_RX_BUFSZ, true); 558 } 559 } 560 } 561 } 562 563 exit: 564 return; 565 } 566 567 /** 568 * igb_get_i2c_data - Reads the I2C SDA data bit 569 * @hw: pointer to hardware structure 570 * @i2cctl: Current value of I2CCTL register 571 * 572 * Returns the I2C data bit value 573 **/ 574 static int igb_get_i2c_data(void *data) 575 { 576 struct igb_adapter *adapter = (struct igb_adapter *)data; 577 struct e1000_hw *hw = &adapter->hw; 578 s32 i2cctl = rd32(E1000_I2CPARAMS); 579 580 return !!(i2cctl & E1000_I2C_DATA_IN); 581 } 582 583 /** 584 * igb_set_i2c_data - Sets the I2C data bit 585 * @data: pointer to hardware structure 586 * @state: I2C data value (0 or 1) to set 587 * 588 * Sets the I2C data bit 589 **/ 590 static void igb_set_i2c_data(void *data, int state) 591 { 592 struct igb_adapter *adapter = (struct igb_adapter *)data; 593 struct e1000_hw *hw = &adapter->hw; 594 s32 i2cctl = rd32(E1000_I2CPARAMS); 595 596 if (state) 597 i2cctl |= E1000_I2C_DATA_OUT; 598 else 599 i2cctl &= ~E1000_I2C_DATA_OUT; 600 601 i2cctl &= ~E1000_I2C_DATA_OE_N; 602 i2cctl |= E1000_I2C_CLK_OE_N; 603 wr32(E1000_I2CPARAMS, i2cctl); 604 wrfl(); 605 606 } 607 608 /** 609 * igb_set_i2c_clk - Sets the I2C SCL clock 610 * @data: pointer to hardware structure 611 * @state: state to set clock 612 * 613 * Sets the I2C clock line to state 614 **/ 615 static void igb_set_i2c_clk(void *data, int state) 616 { 617 struct igb_adapter *adapter = (struct igb_adapter *)data; 618 struct e1000_hw *hw = &adapter->hw; 619 s32 i2cctl = rd32(E1000_I2CPARAMS); 620 621 if (state) { 622 i2cctl |= E1000_I2C_CLK_OUT; 623 i2cctl &= ~E1000_I2C_CLK_OE_N; 624 } else { 625 i2cctl &= ~E1000_I2C_CLK_OUT; 626 i2cctl &= ~E1000_I2C_CLK_OE_N; 627 } 628 wr32(E1000_I2CPARAMS, i2cctl); 629 wrfl(); 630 } 631 632 /** 633 * igb_get_i2c_clk - Gets the I2C SCL clock state 634 * @data: pointer to hardware structure 635 * 636 * Gets the I2C clock state 637 **/ 638 static int igb_get_i2c_clk(void *data) 639 { 640 struct igb_adapter *adapter = (struct igb_adapter *)data; 641 struct e1000_hw *hw = &adapter->hw; 642 s32 i2cctl = rd32(E1000_I2CPARAMS); 643 644 return !!(i2cctl & E1000_I2C_CLK_IN); 645 } 646 647 static const struct i2c_algo_bit_data igb_i2c_algo = { 648 .setsda = igb_set_i2c_data, 649 .setscl = igb_set_i2c_clk, 650 .getsda = igb_get_i2c_data, 651 .getscl = igb_get_i2c_clk, 652 .udelay = 5, 653 .timeout = 20, 654 }; 655 656 /** 657 * igb_get_hw_dev - return device 658 * @hw: pointer to hardware structure 659 * 660 * used by hardware layer to print debugging information 661 **/ 662 struct net_device *igb_get_hw_dev(struct e1000_hw *hw) 663 { 664 struct igb_adapter *adapter = hw->back; 665 return adapter->netdev; 666 } 667 668 /** 669 * igb_init_module - Driver Registration Routine 670 * 671 * igb_init_module is the first routine called when the driver is 672 * loaded. All it does is register with the PCI subsystem. 673 **/ 674 static int __init igb_init_module(void) 675 { 676 int ret; 677 678 pr_info("%s - version %s\n", 679 igb_driver_string, igb_driver_version); 680 pr_info("%s\n", igb_copyright); 681 682 #ifdef CONFIG_IGB_DCA 683 dca_register_notify(&dca_notifier); 684 #endif 685 ret = pci_register_driver(&igb_driver); 686 return ret; 687 } 688 689 module_init(igb_init_module); 690 691 /** 692 * igb_exit_module - Driver Exit Cleanup Routine 693 * 694 * igb_exit_module is called just before the driver is removed 695 * from memory. 696 **/ 697 static void __exit igb_exit_module(void) 698 { 699 #ifdef CONFIG_IGB_DCA 700 dca_unregister_notify(&dca_notifier); 701 #endif 702 pci_unregister_driver(&igb_driver); 703 } 704 705 module_exit(igb_exit_module); 706 707 #define Q_IDX_82576(i) (((i & 0x1) << 3) + (i >> 1)) 708 /** 709 * igb_cache_ring_register - Descriptor ring to register mapping 710 * @adapter: board private structure to initialize 711 * 712 * Once we know the feature-set enabled for the device, we'll cache 713 * the register offset the descriptor ring is assigned to. 714 **/ 715 static void igb_cache_ring_register(struct igb_adapter *adapter) 716 { 717 int i = 0, j = 0; 718 u32 rbase_offset = adapter->vfs_allocated_count; 719 720 switch (adapter->hw.mac.type) { 721 case e1000_82576: 722 /* The queues are allocated for virtualization such that VF 0 723 * is allocated queues 0 and 8, VF 1 queues 1 and 9, etc. 724 * In order to avoid collision we start at the first free queue 725 * and continue consuming queues in the same sequence 726 */ 727 if (adapter->vfs_allocated_count) { 728 for (; i < adapter->rss_queues; i++) 729 adapter->rx_ring[i]->reg_idx = rbase_offset + 730 Q_IDX_82576(i); 731 } 732 /* Fall through */ 733 case e1000_82575: 734 case e1000_82580: 735 case e1000_i350: 736 case e1000_i354: 737 case e1000_i210: 738 case e1000_i211: 739 /* Fall through */ 740 default: 741 for (; i < adapter->num_rx_queues; i++) 742 adapter->rx_ring[i]->reg_idx = rbase_offset + i; 743 for (; j < adapter->num_tx_queues; j++) 744 adapter->tx_ring[j]->reg_idx = rbase_offset + j; 745 break; 746 } 747 } 748 749 u32 igb_rd32(struct e1000_hw *hw, u32 reg) 750 { 751 struct igb_adapter *igb = container_of(hw, struct igb_adapter, hw); 752 u8 __iomem *hw_addr = ACCESS_ONCE(hw->hw_addr); 753 u32 value = 0; 754 755 if (E1000_REMOVED(hw_addr)) 756 return ~value; 757 758 value = readl(&hw_addr[reg]); 759 760 /* reads should not return all F's */ 761 if (!(~value) && (!reg || !(~readl(hw_addr)))) { 762 struct net_device *netdev = igb->netdev; 763 hw->hw_addr = NULL; 764 netif_device_detach(netdev); 765 netdev_err(netdev, "PCIe link lost, device now detached\n"); 766 } 767 768 return value; 769 } 770 771 /** 772 * igb_write_ivar - configure ivar for given MSI-X vector 773 * @hw: pointer to the HW structure 774 * @msix_vector: vector number we are allocating to a given ring 775 * @index: row index of IVAR register to write within IVAR table 776 * @offset: column offset of in IVAR, should be multiple of 8 777 * 778 * This function is intended to handle the writing of the IVAR register 779 * for adapters 82576 and newer. The IVAR table consists of 2 columns, 780 * each containing an cause allocation for an Rx and Tx ring, and a 781 * variable number of rows depending on the number of queues supported. 782 **/ 783 static void igb_write_ivar(struct e1000_hw *hw, int msix_vector, 784 int index, int offset) 785 { 786 u32 ivar = array_rd32(E1000_IVAR0, index); 787 788 /* clear any bits that are currently set */ 789 ivar &= ~((u32)0xFF << offset); 790 791 /* write vector and valid bit */ 792 ivar |= (msix_vector | E1000_IVAR_VALID) << offset; 793 794 array_wr32(E1000_IVAR0, index, ivar); 795 } 796 797 #define IGB_N0_QUEUE -1 798 static void igb_assign_vector(struct igb_q_vector *q_vector, int msix_vector) 799 { 800 struct igb_adapter *adapter = q_vector->adapter; 801 struct e1000_hw *hw = &adapter->hw; 802 int rx_queue = IGB_N0_QUEUE; 803 int tx_queue = IGB_N0_QUEUE; 804 u32 msixbm = 0; 805 806 if (q_vector->rx.ring) 807 rx_queue = q_vector->rx.ring->reg_idx; 808 if (q_vector->tx.ring) 809 tx_queue = q_vector->tx.ring->reg_idx; 810 811 switch (hw->mac.type) { 812 case e1000_82575: 813 /* The 82575 assigns vectors using a bitmask, which matches the 814 * bitmask for the EICR/EIMS/EIMC registers. To assign one 815 * or more queues to a vector, we write the appropriate bits 816 * into the MSIXBM register for that vector. 817 */ 818 if (rx_queue > IGB_N0_QUEUE) 819 msixbm = E1000_EICR_RX_QUEUE0 << rx_queue; 820 if (tx_queue > IGB_N0_QUEUE) 821 msixbm |= E1000_EICR_TX_QUEUE0 << tx_queue; 822 if (!(adapter->flags & IGB_FLAG_HAS_MSIX) && msix_vector == 0) 823 msixbm |= E1000_EIMS_OTHER; 824 array_wr32(E1000_MSIXBM(0), msix_vector, msixbm); 825 q_vector->eims_value = msixbm; 826 break; 827 case e1000_82576: 828 /* 82576 uses a table that essentially consists of 2 columns 829 * with 8 rows. The ordering is column-major so we use the 830 * lower 3 bits as the row index, and the 4th bit as the 831 * column offset. 832 */ 833 if (rx_queue > IGB_N0_QUEUE) 834 igb_write_ivar(hw, msix_vector, 835 rx_queue & 0x7, 836 (rx_queue & 0x8) << 1); 837 if (tx_queue > IGB_N0_QUEUE) 838 igb_write_ivar(hw, msix_vector, 839 tx_queue & 0x7, 840 ((tx_queue & 0x8) << 1) + 8); 841 q_vector->eims_value = BIT(msix_vector); 842 break; 843 case e1000_82580: 844 case e1000_i350: 845 case e1000_i354: 846 case e1000_i210: 847 case e1000_i211: 848 /* On 82580 and newer adapters the scheme is similar to 82576 849 * however instead of ordering column-major we have things 850 * ordered row-major. So we traverse the table by using 851 * bit 0 as the column offset, and the remaining bits as the 852 * row index. 853 */ 854 if (rx_queue > IGB_N0_QUEUE) 855 igb_write_ivar(hw, msix_vector, 856 rx_queue >> 1, 857 (rx_queue & 0x1) << 4); 858 if (tx_queue > IGB_N0_QUEUE) 859 igb_write_ivar(hw, msix_vector, 860 tx_queue >> 1, 861 ((tx_queue & 0x1) << 4) + 8); 862 q_vector->eims_value = BIT(msix_vector); 863 break; 864 default: 865 BUG(); 866 break; 867 } 868 869 /* add q_vector eims value to global eims_enable_mask */ 870 adapter->eims_enable_mask |= q_vector->eims_value; 871 872 /* configure q_vector to set itr on first interrupt */ 873 q_vector->set_itr = 1; 874 } 875 876 /** 877 * igb_configure_msix - Configure MSI-X hardware 878 * @adapter: board private structure to initialize 879 * 880 * igb_configure_msix sets up the hardware to properly 881 * generate MSI-X interrupts. 882 **/ 883 static void igb_configure_msix(struct igb_adapter *adapter) 884 { 885 u32 tmp; 886 int i, vector = 0; 887 struct e1000_hw *hw = &adapter->hw; 888 889 adapter->eims_enable_mask = 0; 890 891 /* set vector for other causes, i.e. link changes */ 892 switch (hw->mac.type) { 893 case e1000_82575: 894 tmp = rd32(E1000_CTRL_EXT); 895 /* enable MSI-X PBA support*/ 896 tmp |= E1000_CTRL_EXT_PBA_CLR; 897 898 /* Auto-Mask interrupts upon ICR read. */ 899 tmp |= E1000_CTRL_EXT_EIAME; 900 tmp |= E1000_CTRL_EXT_IRCA; 901 902 wr32(E1000_CTRL_EXT, tmp); 903 904 /* enable msix_other interrupt */ 905 array_wr32(E1000_MSIXBM(0), vector++, E1000_EIMS_OTHER); 906 adapter->eims_other = E1000_EIMS_OTHER; 907 908 break; 909 910 case e1000_82576: 911 case e1000_82580: 912 case e1000_i350: 913 case e1000_i354: 914 case e1000_i210: 915 case e1000_i211: 916 /* Turn on MSI-X capability first, or our settings 917 * won't stick. And it will take days to debug. 918 */ 919 wr32(E1000_GPIE, E1000_GPIE_MSIX_MODE | 920 E1000_GPIE_PBA | E1000_GPIE_EIAME | 921 E1000_GPIE_NSICR); 922 923 /* enable msix_other interrupt */ 924 adapter->eims_other = BIT(vector); 925 tmp = (vector++ | E1000_IVAR_VALID) << 8; 926 927 wr32(E1000_IVAR_MISC, tmp); 928 break; 929 default: 930 /* do nothing, since nothing else supports MSI-X */ 931 break; 932 } /* switch (hw->mac.type) */ 933 934 adapter->eims_enable_mask |= adapter->eims_other; 935 936 for (i = 0; i < adapter->num_q_vectors; i++) 937 igb_assign_vector(adapter->q_vector[i], vector++); 938 939 wrfl(); 940 } 941 942 /** 943 * igb_request_msix - Initialize MSI-X interrupts 944 * @adapter: board private structure to initialize 945 * 946 * igb_request_msix allocates MSI-X vectors and requests interrupts from the 947 * kernel. 948 **/ 949 static int igb_request_msix(struct igb_adapter *adapter) 950 { 951 struct net_device *netdev = adapter->netdev; 952 int i, err = 0, vector = 0, free_vector = 0; 953 954 err = request_irq(adapter->msix_entries[vector].vector, 955 igb_msix_other, 0, netdev->name, adapter); 956 if (err) 957 goto err_out; 958 959 for (i = 0; i < adapter->num_q_vectors; i++) { 960 struct igb_q_vector *q_vector = adapter->q_vector[i]; 961 962 vector++; 963 964 q_vector->itr_register = adapter->io_addr + E1000_EITR(vector); 965 966 if (q_vector->rx.ring && q_vector->tx.ring) 967 sprintf(q_vector->name, "%s-TxRx-%u", netdev->name, 968 q_vector->rx.ring->queue_index); 969 else if (q_vector->tx.ring) 970 sprintf(q_vector->name, "%s-tx-%u", netdev->name, 971 q_vector->tx.ring->queue_index); 972 else if (q_vector->rx.ring) 973 sprintf(q_vector->name, "%s-rx-%u", netdev->name, 974 q_vector->rx.ring->queue_index); 975 else 976 sprintf(q_vector->name, "%s-unused", netdev->name); 977 978 err = request_irq(adapter->msix_entries[vector].vector, 979 igb_msix_ring, 0, q_vector->name, 980 q_vector); 981 if (err) 982 goto err_free; 983 } 984 985 igb_configure_msix(adapter); 986 return 0; 987 988 err_free: 989 /* free already assigned IRQs */ 990 free_irq(adapter->msix_entries[free_vector++].vector, adapter); 991 992 vector--; 993 for (i = 0; i < vector; i++) { 994 free_irq(adapter->msix_entries[free_vector++].vector, 995 adapter->q_vector[i]); 996 } 997 err_out: 998 return err; 999 } 1000 1001 /** 1002 * igb_free_q_vector - Free memory allocated for specific interrupt vector 1003 * @adapter: board private structure to initialize 1004 * @v_idx: Index of vector to be freed 1005 * 1006 * This function frees the memory allocated to the q_vector. 1007 **/ 1008 static void igb_free_q_vector(struct igb_adapter *adapter, int v_idx) 1009 { 1010 struct igb_q_vector *q_vector = adapter->q_vector[v_idx]; 1011 1012 adapter->q_vector[v_idx] = NULL; 1013 1014 /* igb_get_stats64() might access the rings on this vector, 1015 * we must wait a grace period before freeing it. 1016 */ 1017 if (q_vector) 1018 kfree_rcu(q_vector, rcu); 1019 } 1020 1021 /** 1022 * igb_reset_q_vector - Reset config for interrupt vector 1023 * @adapter: board private structure to initialize 1024 * @v_idx: Index of vector to be reset 1025 * 1026 * If NAPI is enabled it will delete any references to the 1027 * NAPI struct. This is preparation for igb_free_q_vector. 1028 **/ 1029 static void igb_reset_q_vector(struct igb_adapter *adapter, int v_idx) 1030 { 1031 struct igb_q_vector *q_vector = adapter->q_vector[v_idx]; 1032 1033 /* Coming from igb_set_interrupt_capability, the vectors are not yet 1034 * allocated. So, q_vector is NULL so we should stop here. 1035 */ 1036 if (!q_vector) 1037 return; 1038 1039 if (q_vector->tx.ring) 1040 adapter->tx_ring[q_vector->tx.ring->queue_index] = NULL; 1041 1042 if (q_vector->rx.ring) 1043 adapter->rx_ring[q_vector->rx.ring->queue_index] = NULL; 1044 1045 netif_napi_del(&q_vector->napi); 1046 1047 } 1048 1049 static void igb_reset_interrupt_capability(struct igb_adapter *adapter) 1050 { 1051 int v_idx = adapter->num_q_vectors; 1052 1053 if (adapter->flags & IGB_FLAG_HAS_MSIX) 1054 pci_disable_msix(adapter->pdev); 1055 else if (adapter->flags & IGB_FLAG_HAS_MSI) 1056 pci_disable_msi(adapter->pdev); 1057 1058 while (v_idx--) 1059 igb_reset_q_vector(adapter, v_idx); 1060 } 1061 1062 /** 1063 * igb_free_q_vectors - Free memory allocated for interrupt vectors 1064 * @adapter: board private structure to initialize 1065 * 1066 * This function frees the memory allocated to the q_vectors. In addition if 1067 * NAPI is enabled it will delete any references to the NAPI struct prior 1068 * to freeing the q_vector. 1069 **/ 1070 static void igb_free_q_vectors(struct igb_adapter *adapter) 1071 { 1072 int v_idx = adapter->num_q_vectors; 1073 1074 adapter->num_tx_queues = 0; 1075 adapter->num_rx_queues = 0; 1076 adapter->num_q_vectors = 0; 1077 1078 while (v_idx--) { 1079 igb_reset_q_vector(adapter, v_idx); 1080 igb_free_q_vector(adapter, v_idx); 1081 } 1082 } 1083 1084 /** 1085 * igb_clear_interrupt_scheme - reset the device to a state of no interrupts 1086 * @adapter: board private structure to initialize 1087 * 1088 * This function resets the device so that it has 0 Rx queues, Tx queues, and 1089 * MSI-X interrupts allocated. 1090 */ 1091 static void igb_clear_interrupt_scheme(struct igb_adapter *adapter) 1092 { 1093 igb_free_q_vectors(adapter); 1094 igb_reset_interrupt_capability(adapter); 1095 } 1096 1097 /** 1098 * igb_set_interrupt_capability - set MSI or MSI-X if supported 1099 * @adapter: board private structure to initialize 1100 * @msix: boolean value of MSIX capability 1101 * 1102 * Attempt to configure interrupts using the best available 1103 * capabilities of the hardware and kernel. 1104 **/ 1105 static void igb_set_interrupt_capability(struct igb_adapter *adapter, bool msix) 1106 { 1107 int err; 1108 int numvecs, i; 1109 1110 if (!msix) 1111 goto msi_only; 1112 adapter->flags |= IGB_FLAG_HAS_MSIX; 1113 1114 /* Number of supported queues. */ 1115 adapter->num_rx_queues = adapter->rss_queues; 1116 if (adapter->vfs_allocated_count) 1117 adapter->num_tx_queues = 1; 1118 else 1119 adapter->num_tx_queues = adapter->rss_queues; 1120 1121 /* start with one vector for every Rx queue */ 1122 numvecs = adapter->num_rx_queues; 1123 1124 /* if Tx handler is separate add 1 for every Tx queue */ 1125 if (!(adapter->flags & IGB_FLAG_QUEUE_PAIRS)) 1126 numvecs += adapter->num_tx_queues; 1127 1128 /* store the number of vectors reserved for queues */ 1129 adapter->num_q_vectors = numvecs; 1130 1131 /* add 1 vector for link status interrupts */ 1132 numvecs++; 1133 for (i = 0; i < numvecs; i++) 1134 adapter->msix_entries[i].entry = i; 1135 1136 err = pci_enable_msix_range(adapter->pdev, 1137 adapter->msix_entries, 1138 numvecs, 1139 numvecs); 1140 if (err > 0) 1141 return; 1142 1143 igb_reset_interrupt_capability(adapter); 1144 1145 /* If we can't do MSI-X, try MSI */ 1146 msi_only: 1147 adapter->flags &= ~IGB_FLAG_HAS_MSIX; 1148 #ifdef CONFIG_PCI_IOV 1149 /* disable SR-IOV for non MSI-X configurations */ 1150 if (adapter->vf_data) { 1151 struct e1000_hw *hw = &adapter->hw; 1152 /* disable iov and allow time for transactions to clear */ 1153 pci_disable_sriov(adapter->pdev); 1154 msleep(500); 1155 1156 kfree(adapter->vf_data); 1157 adapter->vf_data = NULL; 1158 wr32(E1000_IOVCTL, E1000_IOVCTL_REUSE_VFQ); 1159 wrfl(); 1160 msleep(100); 1161 dev_info(&adapter->pdev->dev, "IOV Disabled\n"); 1162 } 1163 #endif 1164 adapter->vfs_allocated_count = 0; 1165 adapter->rss_queues = 1; 1166 adapter->flags |= IGB_FLAG_QUEUE_PAIRS; 1167 adapter->num_rx_queues = 1; 1168 adapter->num_tx_queues = 1; 1169 adapter->num_q_vectors = 1; 1170 if (!pci_enable_msi(adapter->pdev)) 1171 adapter->flags |= IGB_FLAG_HAS_MSI; 1172 } 1173 1174 static void igb_add_ring(struct igb_ring *ring, 1175 struct igb_ring_container *head) 1176 { 1177 head->ring = ring; 1178 head->count++; 1179 } 1180 1181 /** 1182 * igb_alloc_q_vector - Allocate memory for a single interrupt vector 1183 * @adapter: board private structure to initialize 1184 * @v_count: q_vectors allocated on adapter, used for ring interleaving 1185 * @v_idx: index of vector in adapter struct 1186 * @txr_count: total number of Tx rings to allocate 1187 * @txr_idx: index of first Tx ring to allocate 1188 * @rxr_count: total number of Rx rings to allocate 1189 * @rxr_idx: index of first Rx ring to allocate 1190 * 1191 * We allocate one q_vector. If allocation fails we return -ENOMEM. 1192 **/ 1193 static int igb_alloc_q_vector(struct igb_adapter *adapter, 1194 int v_count, int v_idx, 1195 int txr_count, int txr_idx, 1196 int rxr_count, int rxr_idx) 1197 { 1198 struct igb_q_vector *q_vector; 1199 struct igb_ring *ring; 1200 int ring_count, size; 1201 1202 /* igb only supports 1 Tx and/or 1 Rx queue per vector */ 1203 if (txr_count > 1 || rxr_count > 1) 1204 return -ENOMEM; 1205 1206 ring_count = txr_count + rxr_count; 1207 size = sizeof(struct igb_q_vector) + 1208 (sizeof(struct igb_ring) * ring_count); 1209 1210 /* allocate q_vector and rings */ 1211 q_vector = adapter->q_vector[v_idx]; 1212 if (!q_vector) { 1213 q_vector = kzalloc(size, GFP_KERNEL); 1214 } else if (size > ksize(q_vector)) { 1215 kfree_rcu(q_vector, rcu); 1216 q_vector = kzalloc(size, GFP_KERNEL); 1217 } else { 1218 memset(q_vector, 0, size); 1219 } 1220 if (!q_vector) 1221 return -ENOMEM; 1222 1223 /* initialize NAPI */ 1224 netif_napi_add(adapter->netdev, &q_vector->napi, 1225 igb_poll, 64); 1226 1227 /* tie q_vector and adapter together */ 1228 adapter->q_vector[v_idx] = q_vector; 1229 q_vector->adapter = adapter; 1230 1231 /* initialize work limits */ 1232 q_vector->tx.work_limit = adapter->tx_work_limit; 1233 1234 /* initialize ITR configuration */ 1235 q_vector->itr_register = adapter->io_addr + E1000_EITR(0); 1236 q_vector->itr_val = IGB_START_ITR; 1237 1238 /* initialize pointer to rings */ 1239 ring = q_vector->ring; 1240 1241 /* intialize ITR */ 1242 if (rxr_count) { 1243 /* rx or rx/tx vector */ 1244 if (!adapter->rx_itr_setting || adapter->rx_itr_setting > 3) 1245 q_vector->itr_val = adapter->rx_itr_setting; 1246 } else { 1247 /* tx only vector */ 1248 if (!adapter->tx_itr_setting || adapter->tx_itr_setting > 3) 1249 q_vector->itr_val = adapter->tx_itr_setting; 1250 } 1251 1252 if (txr_count) { 1253 /* assign generic ring traits */ 1254 ring->dev = &adapter->pdev->dev; 1255 ring->netdev = adapter->netdev; 1256 1257 /* configure backlink on ring */ 1258 ring->q_vector = q_vector; 1259 1260 /* update q_vector Tx values */ 1261 igb_add_ring(ring, &q_vector->tx); 1262 1263 /* For 82575, context index must be unique per ring. */ 1264 if (adapter->hw.mac.type == e1000_82575) 1265 set_bit(IGB_RING_FLAG_TX_CTX_IDX, &ring->flags); 1266 1267 /* apply Tx specific ring traits */ 1268 ring->count = adapter->tx_ring_count; 1269 ring->queue_index = txr_idx; 1270 1271 u64_stats_init(&ring->tx_syncp); 1272 u64_stats_init(&ring->tx_syncp2); 1273 1274 /* assign ring to adapter */ 1275 adapter->tx_ring[txr_idx] = ring; 1276 1277 /* push pointer to next ring */ 1278 ring++; 1279 } 1280 1281 if (rxr_count) { 1282 /* assign generic ring traits */ 1283 ring->dev = &adapter->pdev->dev; 1284 ring->netdev = adapter->netdev; 1285 1286 /* configure backlink on ring */ 1287 ring->q_vector = q_vector; 1288 1289 /* update q_vector Rx values */ 1290 igb_add_ring(ring, &q_vector->rx); 1291 1292 /* set flag indicating ring supports SCTP checksum offload */ 1293 if (adapter->hw.mac.type >= e1000_82576) 1294 set_bit(IGB_RING_FLAG_RX_SCTP_CSUM, &ring->flags); 1295 1296 /* On i350, i354, i210, and i211, loopback VLAN packets 1297 * have the tag byte-swapped. 1298 */ 1299 if (adapter->hw.mac.type >= e1000_i350) 1300 set_bit(IGB_RING_FLAG_RX_LB_VLAN_BSWAP, &ring->flags); 1301 1302 /* apply Rx specific ring traits */ 1303 ring->count = adapter->rx_ring_count; 1304 ring->queue_index = rxr_idx; 1305 1306 u64_stats_init(&ring->rx_syncp); 1307 1308 /* assign ring to adapter */ 1309 adapter->rx_ring[rxr_idx] = ring; 1310 } 1311 1312 return 0; 1313 } 1314 1315 1316 /** 1317 * igb_alloc_q_vectors - Allocate memory for interrupt vectors 1318 * @adapter: board private structure to initialize 1319 * 1320 * We allocate one q_vector per queue interrupt. If allocation fails we 1321 * return -ENOMEM. 1322 **/ 1323 static int igb_alloc_q_vectors(struct igb_adapter *adapter) 1324 { 1325 int q_vectors = adapter->num_q_vectors; 1326 int rxr_remaining = adapter->num_rx_queues; 1327 int txr_remaining = adapter->num_tx_queues; 1328 int rxr_idx = 0, txr_idx = 0, v_idx = 0; 1329 int err; 1330 1331 if (q_vectors >= (rxr_remaining + txr_remaining)) { 1332 for (; rxr_remaining; v_idx++) { 1333 err = igb_alloc_q_vector(adapter, q_vectors, v_idx, 1334 0, 0, 1, rxr_idx); 1335 1336 if (err) 1337 goto err_out; 1338 1339 /* update counts and index */ 1340 rxr_remaining--; 1341 rxr_idx++; 1342 } 1343 } 1344 1345 for (; v_idx < q_vectors; v_idx++) { 1346 int rqpv = DIV_ROUND_UP(rxr_remaining, q_vectors - v_idx); 1347 int tqpv = DIV_ROUND_UP(txr_remaining, q_vectors - v_idx); 1348 1349 err = igb_alloc_q_vector(adapter, q_vectors, v_idx, 1350 tqpv, txr_idx, rqpv, rxr_idx); 1351 1352 if (err) 1353 goto err_out; 1354 1355 /* update counts and index */ 1356 rxr_remaining -= rqpv; 1357 txr_remaining -= tqpv; 1358 rxr_idx++; 1359 txr_idx++; 1360 } 1361 1362 return 0; 1363 1364 err_out: 1365 adapter->num_tx_queues = 0; 1366 adapter->num_rx_queues = 0; 1367 adapter->num_q_vectors = 0; 1368 1369 while (v_idx--) 1370 igb_free_q_vector(adapter, v_idx); 1371 1372 return -ENOMEM; 1373 } 1374 1375 /** 1376 * igb_init_interrupt_scheme - initialize interrupts, allocate queues/vectors 1377 * @adapter: board private structure to initialize 1378 * @msix: boolean value of MSIX capability 1379 * 1380 * This function initializes the interrupts and allocates all of the queues. 1381 **/ 1382 static int igb_init_interrupt_scheme(struct igb_adapter *adapter, bool msix) 1383 { 1384 struct pci_dev *pdev = adapter->pdev; 1385 int err; 1386 1387 igb_set_interrupt_capability(adapter, msix); 1388 1389 err = igb_alloc_q_vectors(adapter); 1390 if (err) { 1391 dev_err(&pdev->dev, "Unable to allocate memory for vectors\n"); 1392 goto err_alloc_q_vectors; 1393 } 1394 1395 igb_cache_ring_register(adapter); 1396 1397 return 0; 1398 1399 err_alloc_q_vectors: 1400 igb_reset_interrupt_capability(adapter); 1401 return err; 1402 } 1403 1404 /** 1405 * igb_request_irq - initialize interrupts 1406 * @adapter: board private structure to initialize 1407 * 1408 * Attempts to configure interrupts using the best available 1409 * capabilities of the hardware and kernel. 1410 **/ 1411 static int igb_request_irq(struct igb_adapter *adapter) 1412 { 1413 struct net_device *netdev = adapter->netdev; 1414 struct pci_dev *pdev = adapter->pdev; 1415 int err = 0; 1416 1417 if (adapter->flags & IGB_FLAG_HAS_MSIX) { 1418 err = igb_request_msix(adapter); 1419 if (!err) 1420 goto request_done; 1421 /* fall back to MSI */ 1422 igb_free_all_tx_resources(adapter); 1423 igb_free_all_rx_resources(adapter); 1424 1425 igb_clear_interrupt_scheme(adapter); 1426 err = igb_init_interrupt_scheme(adapter, false); 1427 if (err) 1428 goto request_done; 1429 1430 igb_setup_all_tx_resources(adapter); 1431 igb_setup_all_rx_resources(adapter); 1432 igb_configure(adapter); 1433 } 1434 1435 igb_assign_vector(adapter->q_vector[0], 0); 1436 1437 if (adapter->flags & IGB_FLAG_HAS_MSI) { 1438 err = request_irq(pdev->irq, igb_intr_msi, 0, 1439 netdev->name, adapter); 1440 if (!err) 1441 goto request_done; 1442 1443 /* fall back to legacy interrupts */ 1444 igb_reset_interrupt_capability(adapter); 1445 adapter->flags &= ~IGB_FLAG_HAS_MSI; 1446 } 1447 1448 err = request_irq(pdev->irq, igb_intr, IRQF_SHARED, 1449 netdev->name, adapter); 1450 1451 if (err) 1452 dev_err(&pdev->dev, "Error %d getting interrupt\n", 1453 err); 1454 1455 request_done: 1456 return err; 1457 } 1458 1459 static void igb_free_irq(struct igb_adapter *adapter) 1460 { 1461 if (adapter->flags & IGB_FLAG_HAS_MSIX) { 1462 int vector = 0, i; 1463 1464 free_irq(adapter->msix_entries[vector++].vector, adapter); 1465 1466 for (i = 0; i < adapter->num_q_vectors; i++) 1467 free_irq(adapter->msix_entries[vector++].vector, 1468 adapter->q_vector[i]); 1469 } else { 1470 free_irq(adapter->pdev->irq, adapter); 1471 } 1472 } 1473 1474 /** 1475 * igb_irq_disable - Mask off interrupt generation on the NIC 1476 * @adapter: board private structure 1477 **/ 1478 static void igb_irq_disable(struct igb_adapter *adapter) 1479 { 1480 struct e1000_hw *hw = &adapter->hw; 1481 1482 /* we need to be careful when disabling interrupts. The VFs are also 1483 * mapped into these registers and so clearing the bits can cause 1484 * issues on the VF drivers so we only need to clear what we set 1485 */ 1486 if (adapter->flags & IGB_FLAG_HAS_MSIX) { 1487 u32 regval = rd32(E1000_EIAM); 1488 1489 wr32(E1000_EIAM, regval & ~adapter->eims_enable_mask); 1490 wr32(E1000_EIMC, adapter->eims_enable_mask); 1491 regval = rd32(E1000_EIAC); 1492 wr32(E1000_EIAC, regval & ~adapter->eims_enable_mask); 1493 } 1494 1495 wr32(E1000_IAM, 0); 1496 wr32(E1000_IMC, ~0); 1497 wrfl(); 1498 if (adapter->flags & IGB_FLAG_HAS_MSIX) { 1499 int i; 1500 1501 for (i = 0; i < adapter->num_q_vectors; i++) 1502 synchronize_irq(adapter->msix_entries[i].vector); 1503 } else { 1504 synchronize_irq(adapter->pdev->irq); 1505 } 1506 } 1507 1508 /** 1509 * igb_irq_enable - Enable default interrupt generation settings 1510 * @adapter: board private structure 1511 **/ 1512 static void igb_irq_enable(struct igb_adapter *adapter) 1513 { 1514 struct e1000_hw *hw = &adapter->hw; 1515 1516 if (adapter->flags & IGB_FLAG_HAS_MSIX) { 1517 u32 ims = E1000_IMS_LSC | E1000_IMS_DOUTSYNC | E1000_IMS_DRSTA; 1518 u32 regval = rd32(E1000_EIAC); 1519 1520 wr32(E1000_EIAC, regval | adapter->eims_enable_mask); 1521 regval = rd32(E1000_EIAM); 1522 wr32(E1000_EIAM, regval | adapter->eims_enable_mask); 1523 wr32(E1000_EIMS, adapter->eims_enable_mask); 1524 if (adapter->vfs_allocated_count) { 1525 wr32(E1000_MBVFIMR, 0xFF); 1526 ims |= E1000_IMS_VMMB; 1527 } 1528 wr32(E1000_IMS, ims); 1529 } else { 1530 wr32(E1000_IMS, IMS_ENABLE_MASK | 1531 E1000_IMS_DRSTA); 1532 wr32(E1000_IAM, IMS_ENABLE_MASK | 1533 E1000_IMS_DRSTA); 1534 } 1535 } 1536 1537 static void igb_update_mng_vlan(struct igb_adapter *adapter) 1538 { 1539 struct e1000_hw *hw = &adapter->hw; 1540 u16 pf_id = adapter->vfs_allocated_count; 1541 u16 vid = adapter->hw.mng_cookie.vlan_id; 1542 u16 old_vid = adapter->mng_vlan_id; 1543 1544 if (hw->mng_cookie.status & E1000_MNG_DHCP_COOKIE_STATUS_VLAN) { 1545 /* add VID to filter table */ 1546 igb_vfta_set(hw, vid, pf_id, true, true); 1547 adapter->mng_vlan_id = vid; 1548 } else { 1549 adapter->mng_vlan_id = IGB_MNG_VLAN_NONE; 1550 } 1551 1552 if ((old_vid != (u16)IGB_MNG_VLAN_NONE) && 1553 (vid != old_vid) && 1554 !test_bit(old_vid, adapter->active_vlans)) { 1555 /* remove VID from filter table */ 1556 igb_vfta_set(hw, vid, pf_id, false, true); 1557 } 1558 } 1559 1560 /** 1561 * igb_release_hw_control - release control of the h/w to f/w 1562 * @adapter: address of board private structure 1563 * 1564 * igb_release_hw_control resets CTRL_EXT:DRV_LOAD bit. 1565 * For ASF and Pass Through versions of f/w this means that the 1566 * driver is no longer loaded. 1567 **/ 1568 static void igb_release_hw_control(struct igb_adapter *adapter) 1569 { 1570 struct e1000_hw *hw = &adapter->hw; 1571 u32 ctrl_ext; 1572 1573 /* Let firmware take over control of h/w */ 1574 ctrl_ext = rd32(E1000_CTRL_EXT); 1575 wr32(E1000_CTRL_EXT, 1576 ctrl_ext & ~E1000_CTRL_EXT_DRV_LOAD); 1577 } 1578 1579 /** 1580 * igb_get_hw_control - get control of the h/w from f/w 1581 * @adapter: address of board private structure 1582 * 1583 * igb_get_hw_control sets CTRL_EXT:DRV_LOAD bit. 1584 * For ASF and Pass Through versions of f/w this means that 1585 * the driver is loaded. 1586 **/ 1587 static void igb_get_hw_control(struct igb_adapter *adapter) 1588 { 1589 struct e1000_hw *hw = &adapter->hw; 1590 u32 ctrl_ext; 1591 1592 /* Let firmware know the driver has taken over */ 1593 ctrl_ext = rd32(E1000_CTRL_EXT); 1594 wr32(E1000_CTRL_EXT, 1595 ctrl_ext | E1000_CTRL_EXT_DRV_LOAD); 1596 } 1597 1598 /** 1599 * igb_configure - configure the hardware for RX and TX 1600 * @adapter: private board structure 1601 **/ 1602 static void igb_configure(struct igb_adapter *adapter) 1603 { 1604 struct net_device *netdev = adapter->netdev; 1605 int i; 1606 1607 igb_get_hw_control(adapter); 1608 igb_set_rx_mode(netdev); 1609 1610 igb_restore_vlan(adapter); 1611 1612 igb_setup_tctl(adapter); 1613 igb_setup_mrqc(adapter); 1614 igb_setup_rctl(adapter); 1615 1616 igb_nfc_filter_restore(adapter); 1617 igb_configure_tx(adapter); 1618 igb_configure_rx(adapter); 1619 1620 igb_rx_fifo_flush_82575(&adapter->hw); 1621 1622 /* call igb_desc_unused which always leaves 1623 * at least 1 descriptor unused to make sure 1624 * next_to_use != next_to_clean 1625 */ 1626 for (i = 0; i < adapter->num_rx_queues; i++) { 1627 struct igb_ring *ring = adapter->rx_ring[i]; 1628 igb_alloc_rx_buffers(ring, igb_desc_unused(ring)); 1629 } 1630 } 1631 1632 /** 1633 * igb_power_up_link - Power up the phy/serdes link 1634 * @adapter: address of board private structure 1635 **/ 1636 void igb_power_up_link(struct igb_adapter *adapter) 1637 { 1638 igb_reset_phy(&adapter->hw); 1639 1640 if (adapter->hw.phy.media_type == e1000_media_type_copper) 1641 igb_power_up_phy_copper(&adapter->hw); 1642 else 1643 igb_power_up_serdes_link_82575(&adapter->hw); 1644 1645 igb_setup_link(&adapter->hw); 1646 } 1647 1648 /** 1649 * igb_power_down_link - Power down the phy/serdes link 1650 * @adapter: address of board private structure 1651 */ 1652 static void igb_power_down_link(struct igb_adapter *adapter) 1653 { 1654 if (adapter->hw.phy.media_type == e1000_media_type_copper) 1655 igb_power_down_phy_copper_82575(&adapter->hw); 1656 else 1657 igb_shutdown_serdes_link_82575(&adapter->hw); 1658 } 1659 1660 /** 1661 * Detect and switch function for Media Auto Sense 1662 * @adapter: address of the board private structure 1663 **/ 1664 static void igb_check_swap_media(struct igb_adapter *adapter) 1665 { 1666 struct e1000_hw *hw = &adapter->hw; 1667 u32 ctrl_ext, connsw; 1668 bool swap_now = false; 1669 1670 ctrl_ext = rd32(E1000_CTRL_EXT); 1671 connsw = rd32(E1000_CONNSW); 1672 1673 /* need to live swap if current media is copper and we have fiber/serdes 1674 * to go to. 1675 */ 1676 1677 if ((hw->phy.media_type == e1000_media_type_copper) && 1678 (!(connsw & E1000_CONNSW_AUTOSENSE_EN))) { 1679 swap_now = true; 1680 } else if (!(connsw & E1000_CONNSW_SERDESD)) { 1681 /* copper signal takes time to appear */ 1682 if (adapter->copper_tries < 4) { 1683 adapter->copper_tries++; 1684 connsw |= E1000_CONNSW_AUTOSENSE_CONF; 1685 wr32(E1000_CONNSW, connsw); 1686 return; 1687 } else { 1688 adapter->copper_tries = 0; 1689 if ((connsw & E1000_CONNSW_PHYSD) && 1690 (!(connsw & E1000_CONNSW_PHY_PDN))) { 1691 swap_now = true; 1692 connsw &= ~E1000_CONNSW_AUTOSENSE_CONF; 1693 wr32(E1000_CONNSW, connsw); 1694 } 1695 } 1696 } 1697 1698 if (!swap_now) 1699 return; 1700 1701 switch (hw->phy.media_type) { 1702 case e1000_media_type_copper: 1703 netdev_info(adapter->netdev, 1704 "MAS: changing media to fiber/serdes\n"); 1705 ctrl_ext |= 1706 E1000_CTRL_EXT_LINK_MODE_PCIE_SERDES; 1707 adapter->flags |= IGB_FLAG_MEDIA_RESET; 1708 adapter->copper_tries = 0; 1709 break; 1710 case e1000_media_type_internal_serdes: 1711 case e1000_media_type_fiber: 1712 netdev_info(adapter->netdev, 1713 "MAS: changing media to copper\n"); 1714 ctrl_ext &= 1715 ~E1000_CTRL_EXT_LINK_MODE_PCIE_SERDES; 1716 adapter->flags |= IGB_FLAG_MEDIA_RESET; 1717 break; 1718 default: 1719 /* shouldn't get here during regular operation */ 1720 netdev_err(adapter->netdev, 1721 "AMS: Invalid media type found, returning\n"); 1722 break; 1723 } 1724 wr32(E1000_CTRL_EXT, ctrl_ext); 1725 } 1726 1727 /** 1728 * igb_up - Open the interface and prepare it to handle traffic 1729 * @adapter: board private structure 1730 **/ 1731 int igb_up(struct igb_adapter *adapter) 1732 { 1733 struct e1000_hw *hw = &adapter->hw; 1734 int i; 1735 1736 /* hardware has been reset, we need to reload some things */ 1737 igb_configure(adapter); 1738 1739 clear_bit(__IGB_DOWN, &adapter->state); 1740 1741 for (i = 0; i < adapter->num_q_vectors; i++) 1742 napi_enable(&(adapter->q_vector[i]->napi)); 1743 1744 if (adapter->flags & IGB_FLAG_HAS_MSIX) 1745 igb_configure_msix(adapter); 1746 else 1747 igb_assign_vector(adapter->q_vector[0], 0); 1748 1749 /* Clear any pending interrupts. */ 1750 rd32(E1000_ICR); 1751 igb_irq_enable(adapter); 1752 1753 /* notify VFs that reset has been completed */ 1754 if (adapter->vfs_allocated_count) { 1755 u32 reg_data = rd32(E1000_CTRL_EXT); 1756 1757 reg_data |= E1000_CTRL_EXT_PFRSTD; 1758 wr32(E1000_CTRL_EXT, reg_data); 1759 } 1760 1761 netif_tx_start_all_queues(adapter->netdev); 1762 1763 /* start the watchdog. */ 1764 hw->mac.get_link_status = 1; 1765 schedule_work(&adapter->watchdog_task); 1766 1767 if ((adapter->flags & IGB_FLAG_EEE) && 1768 (!hw->dev_spec._82575.eee_disable)) 1769 adapter->eee_advert = MDIO_EEE_100TX | MDIO_EEE_1000T; 1770 1771 return 0; 1772 } 1773 1774 void igb_down(struct igb_adapter *adapter) 1775 { 1776 struct net_device *netdev = adapter->netdev; 1777 struct e1000_hw *hw = &adapter->hw; 1778 u32 tctl, rctl; 1779 int i; 1780 1781 /* signal that we're down so the interrupt handler does not 1782 * reschedule our watchdog timer 1783 */ 1784 set_bit(__IGB_DOWN, &adapter->state); 1785 1786 /* disable receives in the hardware */ 1787 rctl = rd32(E1000_RCTL); 1788 wr32(E1000_RCTL, rctl & ~E1000_RCTL_EN); 1789 /* flush and sleep below */ 1790 1791 netif_carrier_off(netdev); 1792 netif_tx_stop_all_queues(netdev); 1793 1794 /* disable transmits in the hardware */ 1795 tctl = rd32(E1000_TCTL); 1796 tctl &= ~E1000_TCTL_EN; 1797 wr32(E1000_TCTL, tctl); 1798 /* flush both disables and wait for them to finish */ 1799 wrfl(); 1800 usleep_range(10000, 11000); 1801 1802 igb_irq_disable(adapter); 1803 1804 adapter->flags &= ~IGB_FLAG_NEED_LINK_UPDATE; 1805 1806 for (i = 0; i < adapter->num_q_vectors; i++) { 1807 if (adapter->q_vector[i]) { 1808 napi_synchronize(&adapter->q_vector[i]->napi); 1809 napi_disable(&adapter->q_vector[i]->napi); 1810 } 1811 } 1812 1813 del_timer_sync(&adapter->watchdog_timer); 1814 del_timer_sync(&adapter->phy_info_timer); 1815 1816 /* record the stats before reset*/ 1817 spin_lock(&adapter->stats64_lock); 1818 igb_update_stats(adapter, &adapter->stats64); 1819 spin_unlock(&adapter->stats64_lock); 1820 1821 adapter->link_speed = 0; 1822 adapter->link_duplex = 0; 1823 1824 if (!pci_channel_offline(adapter->pdev)) 1825 igb_reset(adapter); 1826 1827 /* clear VLAN promisc flag so VFTA will be updated if necessary */ 1828 adapter->flags &= ~IGB_FLAG_VLAN_PROMISC; 1829 1830 igb_clean_all_tx_rings(adapter); 1831 igb_clean_all_rx_rings(adapter); 1832 #ifdef CONFIG_IGB_DCA 1833 1834 /* since we reset the hardware DCA settings were cleared */ 1835 igb_setup_dca(adapter); 1836 #endif 1837 } 1838 1839 void igb_reinit_locked(struct igb_adapter *adapter) 1840 { 1841 WARN_ON(in_interrupt()); 1842 while (test_and_set_bit(__IGB_RESETTING, &adapter->state)) 1843 usleep_range(1000, 2000); 1844 igb_down(adapter); 1845 igb_up(adapter); 1846 clear_bit(__IGB_RESETTING, &adapter->state); 1847 } 1848 1849 /** igb_enable_mas - Media Autosense re-enable after swap 1850 * 1851 * @adapter: adapter struct 1852 **/ 1853 static void igb_enable_mas(struct igb_adapter *adapter) 1854 { 1855 struct e1000_hw *hw = &adapter->hw; 1856 u32 connsw = rd32(E1000_CONNSW); 1857 1858 /* configure for SerDes media detect */ 1859 if ((hw->phy.media_type == e1000_media_type_copper) && 1860 (!(connsw & E1000_CONNSW_SERDESD))) { 1861 connsw |= E1000_CONNSW_ENRGSRC; 1862 connsw |= E1000_CONNSW_AUTOSENSE_EN; 1863 wr32(E1000_CONNSW, connsw); 1864 wrfl(); 1865 } 1866 } 1867 1868 void igb_reset(struct igb_adapter *adapter) 1869 { 1870 struct pci_dev *pdev = adapter->pdev; 1871 struct e1000_hw *hw = &adapter->hw; 1872 struct e1000_mac_info *mac = &hw->mac; 1873 struct e1000_fc_info *fc = &hw->fc; 1874 u32 pba, hwm; 1875 1876 /* Repartition Pba for greater than 9k mtu 1877 * To take effect CTRL.RST is required. 1878 */ 1879 switch (mac->type) { 1880 case e1000_i350: 1881 case e1000_i354: 1882 case e1000_82580: 1883 pba = rd32(E1000_RXPBS); 1884 pba = igb_rxpbs_adjust_82580(pba); 1885 break; 1886 case e1000_82576: 1887 pba = rd32(E1000_RXPBS); 1888 pba &= E1000_RXPBS_SIZE_MASK_82576; 1889 break; 1890 case e1000_82575: 1891 case e1000_i210: 1892 case e1000_i211: 1893 default: 1894 pba = E1000_PBA_34K; 1895 break; 1896 } 1897 1898 if (mac->type == e1000_82575) { 1899 u32 min_rx_space, min_tx_space, needed_tx_space; 1900 1901 /* write Rx PBA so that hardware can report correct Tx PBA */ 1902 wr32(E1000_PBA, pba); 1903 1904 /* To maintain wire speed transmits, the Tx FIFO should be 1905 * large enough to accommodate two full transmit packets, 1906 * rounded up to the next 1KB and expressed in KB. Likewise, 1907 * the Rx FIFO should be large enough to accommodate at least 1908 * one full receive packet and is similarly rounded up and 1909 * expressed in KB. 1910 */ 1911 min_rx_space = DIV_ROUND_UP(MAX_JUMBO_FRAME_SIZE, 1024); 1912 1913 /* The Tx FIFO also stores 16 bytes of information about the Tx 1914 * but don't include Ethernet FCS because hardware appends it. 1915 * We only need to round down to the nearest 512 byte block 1916 * count since the value we care about is 2 frames, not 1. 1917 */ 1918 min_tx_space = adapter->max_frame_size; 1919 min_tx_space += sizeof(union e1000_adv_tx_desc) - ETH_FCS_LEN; 1920 min_tx_space = DIV_ROUND_UP(min_tx_space, 512); 1921 1922 /* upper 16 bits has Tx packet buffer allocation size in KB */ 1923 needed_tx_space = min_tx_space - (rd32(E1000_PBA) >> 16); 1924 1925 /* If current Tx allocation is less than the min Tx FIFO size, 1926 * and the min Tx FIFO size is less than the current Rx FIFO 1927 * allocation, take space away from current Rx allocation. 1928 */ 1929 if (needed_tx_space < pba) { 1930 pba -= needed_tx_space; 1931 1932 /* if short on Rx space, Rx wins and must trump Tx 1933 * adjustment 1934 */ 1935 if (pba < min_rx_space) 1936 pba = min_rx_space; 1937 } 1938 1939 /* adjust PBA for jumbo frames */ 1940 wr32(E1000_PBA, pba); 1941 } 1942 1943 /* flow control settings 1944 * The high water mark must be low enough to fit one full frame 1945 * after transmitting the pause frame. As such we must have enough 1946 * space to allow for us to complete our current transmit and then 1947 * receive the frame that is in progress from the link partner. 1948 * Set it to: 1949 * - the full Rx FIFO size minus one full Tx plus one full Rx frame 1950 */ 1951 hwm = (pba << 10) - (adapter->max_frame_size + MAX_JUMBO_FRAME_SIZE); 1952 1953 fc->high_water = hwm & 0xFFFFFFF0; /* 16-byte granularity */ 1954 fc->low_water = fc->high_water - 16; 1955 fc->pause_time = 0xFFFF; 1956 fc->send_xon = 1; 1957 fc->current_mode = fc->requested_mode; 1958 1959 /* disable receive for all VFs and wait one second */ 1960 if (adapter->vfs_allocated_count) { 1961 int i; 1962 1963 for (i = 0 ; i < adapter->vfs_allocated_count; i++) 1964 adapter->vf_data[i].flags &= IGB_VF_FLAG_PF_SET_MAC; 1965 1966 /* ping all the active vfs to let them know we are going down */ 1967 igb_ping_all_vfs(adapter); 1968 1969 /* disable transmits and receives */ 1970 wr32(E1000_VFRE, 0); 1971 wr32(E1000_VFTE, 0); 1972 } 1973 1974 /* Allow time for pending master requests to run */ 1975 hw->mac.ops.reset_hw(hw); 1976 wr32(E1000_WUC, 0); 1977 1978 if (adapter->flags & IGB_FLAG_MEDIA_RESET) { 1979 /* need to resetup here after media swap */ 1980 adapter->ei.get_invariants(hw); 1981 adapter->flags &= ~IGB_FLAG_MEDIA_RESET; 1982 } 1983 if ((mac->type == e1000_82575) && 1984 (adapter->flags & IGB_FLAG_MAS_ENABLE)) { 1985 igb_enable_mas(adapter); 1986 } 1987 if (hw->mac.ops.init_hw(hw)) 1988 dev_err(&pdev->dev, "Hardware Error\n"); 1989 1990 /* Flow control settings reset on hardware reset, so guarantee flow 1991 * control is off when forcing speed. 1992 */ 1993 if (!hw->mac.autoneg) 1994 igb_force_mac_fc(hw); 1995 1996 igb_init_dmac(adapter, pba); 1997 #ifdef CONFIG_IGB_HWMON 1998 /* Re-initialize the thermal sensor on i350 devices. */ 1999 if (!test_bit(__IGB_DOWN, &adapter->state)) { 2000 if (mac->type == e1000_i350 && hw->bus.func == 0) { 2001 /* If present, re-initialize the external thermal sensor 2002 * interface. 2003 */ 2004 if (adapter->ets) 2005 mac->ops.init_thermal_sensor_thresh(hw); 2006 } 2007 } 2008 #endif 2009 /* Re-establish EEE setting */ 2010 if (hw->phy.media_type == e1000_media_type_copper) { 2011 switch (mac->type) { 2012 case e1000_i350: 2013 case e1000_i210: 2014 case e1000_i211: 2015 igb_set_eee_i350(hw, true, true); 2016 break; 2017 case e1000_i354: 2018 igb_set_eee_i354(hw, true, true); 2019 break; 2020 default: 2021 break; 2022 } 2023 } 2024 if (!netif_running(adapter->netdev)) 2025 igb_power_down_link(adapter); 2026 2027 igb_update_mng_vlan(adapter); 2028 2029 /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */ 2030 wr32(E1000_VET, ETHERNET_IEEE_VLAN_TYPE); 2031 2032 /* Re-enable PTP, where applicable. */ 2033 if (adapter->ptp_flags & IGB_PTP_ENABLED) 2034 igb_ptp_reset(adapter); 2035 2036 igb_get_phy_info(hw); 2037 } 2038 2039 static netdev_features_t igb_fix_features(struct net_device *netdev, 2040 netdev_features_t features) 2041 { 2042 /* Since there is no support for separate Rx/Tx vlan accel 2043 * enable/disable make sure Tx flag is always in same state as Rx. 2044 */ 2045 if (features & NETIF_F_HW_VLAN_CTAG_RX) 2046 features |= NETIF_F_HW_VLAN_CTAG_TX; 2047 else 2048 features &= ~NETIF_F_HW_VLAN_CTAG_TX; 2049 2050 return features; 2051 } 2052 2053 static int igb_set_features(struct net_device *netdev, 2054 netdev_features_t features) 2055 { 2056 netdev_features_t changed = netdev->features ^ features; 2057 struct igb_adapter *adapter = netdev_priv(netdev); 2058 2059 if (changed & NETIF_F_HW_VLAN_CTAG_RX) 2060 igb_vlan_mode(netdev, features); 2061 2062 if (!(changed & (NETIF_F_RXALL | NETIF_F_NTUPLE))) 2063 return 0; 2064 2065 if (!(features & NETIF_F_NTUPLE)) { 2066 struct hlist_node *node2; 2067 struct igb_nfc_filter *rule; 2068 2069 spin_lock(&adapter->nfc_lock); 2070 hlist_for_each_entry_safe(rule, node2, 2071 &adapter->nfc_filter_list, nfc_node) { 2072 igb_erase_filter(adapter, rule); 2073 hlist_del(&rule->nfc_node); 2074 kfree(rule); 2075 } 2076 spin_unlock(&adapter->nfc_lock); 2077 adapter->nfc_filter_count = 0; 2078 } 2079 2080 netdev->features = features; 2081 2082 if (netif_running(netdev)) 2083 igb_reinit_locked(adapter); 2084 else 2085 igb_reset(adapter); 2086 2087 return 0; 2088 } 2089 2090 static int igb_ndo_fdb_add(struct ndmsg *ndm, struct nlattr *tb[], 2091 struct net_device *dev, 2092 const unsigned char *addr, u16 vid, 2093 u16 flags) 2094 { 2095 /* guarantee we can provide a unique filter for the unicast address */ 2096 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr)) { 2097 struct igb_adapter *adapter = netdev_priv(dev); 2098 struct e1000_hw *hw = &adapter->hw; 2099 int vfn = adapter->vfs_allocated_count; 2100 int rar_entries = hw->mac.rar_entry_count - (vfn + 1); 2101 2102 if (netdev_uc_count(dev) >= rar_entries) 2103 return -ENOMEM; 2104 } 2105 2106 return ndo_dflt_fdb_add(ndm, tb, dev, addr, vid, flags); 2107 } 2108 2109 #define IGB_MAX_MAC_HDR_LEN 127 2110 #define IGB_MAX_NETWORK_HDR_LEN 511 2111 2112 static netdev_features_t 2113 igb_features_check(struct sk_buff *skb, struct net_device *dev, 2114 netdev_features_t features) 2115 { 2116 unsigned int network_hdr_len, mac_hdr_len; 2117 2118 /* Make certain the headers can be described by a context descriptor */ 2119 mac_hdr_len = skb_network_header(skb) - skb->data; 2120 if (unlikely(mac_hdr_len > IGB_MAX_MAC_HDR_LEN)) 2121 return features & ~(NETIF_F_HW_CSUM | 2122 NETIF_F_SCTP_CRC | 2123 NETIF_F_HW_VLAN_CTAG_TX | 2124 NETIF_F_TSO | 2125 NETIF_F_TSO6); 2126 2127 network_hdr_len = skb_checksum_start(skb) - skb_network_header(skb); 2128 if (unlikely(network_hdr_len > IGB_MAX_NETWORK_HDR_LEN)) 2129 return features & ~(NETIF_F_HW_CSUM | 2130 NETIF_F_SCTP_CRC | 2131 NETIF_F_TSO | 2132 NETIF_F_TSO6); 2133 2134 /* We can only support IPV4 TSO in tunnels if we can mangle the 2135 * inner IP ID field, so strip TSO if MANGLEID is not supported. 2136 */ 2137 if (skb->encapsulation && !(features & NETIF_F_TSO_MANGLEID)) 2138 features &= ~NETIF_F_TSO; 2139 2140 return features; 2141 } 2142 2143 static const struct net_device_ops igb_netdev_ops = { 2144 .ndo_open = igb_open, 2145 .ndo_stop = igb_close, 2146 .ndo_start_xmit = igb_xmit_frame, 2147 .ndo_get_stats64 = igb_get_stats64, 2148 .ndo_set_rx_mode = igb_set_rx_mode, 2149 .ndo_set_mac_address = igb_set_mac, 2150 .ndo_change_mtu = igb_change_mtu, 2151 .ndo_do_ioctl = igb_ioctl, 2152 .ndo_tx_timeout = igb_tx_timeout, 2153 .ndo_validate_addr = eth_validate_addr, 2154 .ndo_vlan_rx_add_vid = igb_vlan_rx_add_vid, 2155 .ndo_vlan_rx_kill_vid = igb_vlan_rx_kill_vid, 2156 .ndo_set_vf_mac = igb_ndo_set_vf_mac, 2157 .ndo_set_vf_vlan = igb_ndo_set_vf_vlan, 2158 .ndo_set_vf_rate = igb_ndo_set_vf_bw, 2159 .ndo_set_vf_spoofchk = igb_ndo_set_vf_spoofchk, 2160 .ndo_get_vf_config = igb_ndo_get_vf_config, 2161 #ifdef CONFIG_NET_POLL_CONTROLLER 2162 .ndo_poll_controller = igb_netpoll, 2163 #endif 2164 .ndo_fix_features = igb_fix_features, 2165 .ndo_set_features = igb_set_features, 2166 .ndo_fdb_add = igb_ndo_fdb_add, 2167 .ndo_features_check = igb_features_check, 2168 }; 2169 2170 /** 2171 * igb_set_fw_version - Configure version string for ethtool 2172 * @adapter: adapter struct 2173 **/ 2174 void igb_set_fw_version(struct igb_adapter *adapter) 2175 { 2176 struct e1000_hw *hw = &adapter->hw; 2177 struct e1000_fw_version fw; 2178 2179 igb_get_fw_version(hw, &fw); 2180 2181 switch (hw->mac.type) { 2182 case e1000_i210: 2183 case e1000_i211: 2184 if (!(igb_get_flash_presence_i210(hw))) { 2185 snprintf(adapter->fw_version, 2186 sizeof(adapter->fw_version), 2187 "%2d.%2d-%d", 2188 fw.invm_major, fw.invm_minor, 2189 fw.invm_img_type); 2190 break; 2191 } 2192 /* fall through */ 2193 default: 2194 /* if option is rom valid, display its version too */ 2195 if (fw.or_valid) { 2196 snprintf(adapter->fw_version, 2197 sizeof(adapter->fw_version), 2198 "%d.%d, 0x%08x, %d.%d.%d", 2199 fw.eep_major, fw.eep_minor, fw.etrack_id, 2200 fw.or_major, fw.or_build, fw.or_patch); 2201 /* no option rom */ 2202 } else if (fw.etrack_id != 0X0000) { 2203 snprintf(adapter->fw_version, 2204 sizeof(adapter->fw_version), 2205 "%d.%d, 0x%08x", 2206 fw.eep_major, fw.eep_minor, fw.etrack_id); 2207 } else { 2208 snprintf(adapter->fw_version, 2209 sizeof(adapter->fw_version), 2210 "%d.%d.%d", 2211 fw.eep_major, fw.eep_minor, fw.eep_build); 2212 } 2213 break; 2214 } 2215 } 2216 2217 /** 2218 * igb_init_mas - init Media Autosense feature if enabled in the NVM 2219 * 2220 * @adapter: adapter struct 2221 **/ 2222 static void igb_init_mas(struct igb_adapter *adapter) 2223 { 2224 struct e1000_hw *hw = &adapter->hw; 2225 u16 eeprom_data; 2226 2227 hw->nvm.ops.read(hw, NVM_COMPAT, 1, &eeprom_data); 2228 switch (hw->bus.func) { 2229 case E1000_FUNC_0: 2230 if (eeprom_data & IGB_MAS_ENABLE_0) { 2231 adapter->flags |= IGB_FLAG_MAS_ENABLE; 2232 netdev_info(adapter->netdev, 2233 "MAS: Enabling Media Autosense for port %d\n", 2234 hw->bus.func); 2235 } 2236 break; 2237 case E1000_FUNC_1: 2238 if (eeprom_data & IGB_MAS_ENABLE_1) { 2239 adapter->flags |= IGB_FLAG_MAS_ENABLE; 2240 netdev_info(adapter->netdev, 2241 "MAS: Enabling Media Autosense for port %d\n", 2242 hw->bus.func); 2243 } 2244 break; 2245 case E1000_FUNC_2: 2246 if (eeprom_data & IGB_MAS_ENABLE_2) { 2247 adapter->flags |= IGB_FLAG_MAS_ENABLE; 2248 netdev_info(adapter->netdev, 2249 "MAS: Enabling Media Autosense for port %d\n", 2250 hw->bus.func); 2251 } 2252 break; 2253 case E1000_FUNC_3: 2254 if (eeprom_data & IGB_MAS_ENABLE_3) { 2255 adapter->flags |= IGB_FLAG_MAS_ENABLE; 2256 netdev_info(adapter->netdev, 2257 "MAS: Enabling Media Autosense for port %d\n", 2258 hw->bus.func); 2259 } 2260 break; 2261 default: 2262 /* Shouldn't get here */ 2263 netdev_err(adapter->netdev, 2264 "MAS: Invalid port configuration, returning\n"); 2265 break; 2266 } 2267 } 2268 2269 /** 2270 * igb_init_i2c - Init I2C interface 2271 * @adapter: pointer to adapter structure 2272 **/ 2273 static s32 igb_init_i2c(struct igb_adapter *adapter) 2274 { 2275 s32 status = 0; 2276 2277 /* I2C interface supported on i350 devices */ 2278 if (adapter->hw.mac.type != e1000_i350) 2279 return 0; 2280 2281 /* Initialize the i2c bus which is controlled by the registers. 2282 * This bus will use the i2c_algo_bit structue that implements 2283 * the protocol through toggling of the 4 bits in the register. 2284 */ 2285 adapter->i2c_adap.owner = THIS_MODULE; 2286 adapter->i2c_algo = igb_i2c_algo; 2287 adapter->i2c_algo.data = adapter; 2288 adapter->i2c_adap.algo_data = &adapter->i2c_algo; 2289 adapter->i2c_adap.dev.parent = &adapter->pdev->dev; 2290 strlcpy(adapter->i2c_adap.name, "igb BB", 2291 sizeof(adapter->i2c_adap.name)); 2292 status = i2c_bit_add_bus(&adapter->i2c_adap); 2293 return status; 2294 } 2295 2296 /** 2297 * igb_probe - Device Initialization Routine 2298 * @pdev: PCI device information struct 2299 * @ent: entry in igb_pci_tbl 2300 * 2301 * Returns 0 on success, negative on failure 2302 * 2303 * igb_probe initializes an adapter identified by a pci_dev structure. 2304 * The OS initialization, configuring of the adapter private structure, 2305 * and a hardware reset occur. 2306 **/ 2307 static int igb_probe(struct pci_dev *pdev, const struct pci_device_id *ent) 2308 { 2309 struct net_device *netdev; 2310 struct igb_adapter *adapter; 2311 struct e1000_hw *hw; 2312 u16 eeprom_data = 0; 2313 s32 ret_val; 2314 static int global_quad_port_a; /* global quad port a indication */ 2315 const struct e1000_info *ei = igb_info_tbl[ent->driver_data]; 2316 int err, pci_using_dac; 2317 u8 part_str[E1000_PBANUM_LENGTH]; 2318 2319 /* Catch broken hardware that put the wrong VF device ID in 2320 * the PCIe SR-IOV capability. 2321 */ 2322 if (pdev->is_virtfn) { 2323 WARN(1, KERN_ERR "%s (%hx:%hx) should not be a VF!\n", 2324 pci_name(pdev), pdev->vendor, pdev->device); 2325 return -EINVAL; 2326 } 2327 2328 err = pci_enable_device_mem(pdev); 2329 if (err) 2330 return err; 2331 2332 pci_using_dac = 0; 2333 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64)); 2334 if (!err) { 2335 pci_using_dac = 1; 2336 } else { 2337 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)); 2338 if (err) { 2339 dev_err(&pdev->dev, 2340 "No usable DMA configuration, aborting\n"); 2341 goto err_dma; 2342 } 2343 } 2344 2345 err = pci_request_mem_regions(pdev, igb_driver_name); 2346 if (err) 2347 goto err_pci_reg; 2348 2349 pci_enable_pcie_error_reporting(pdev); 2350 2351 pci_set_master(pdev); 2352 pci_save_state(pdev); 2353 2354 err = -ENOMEM; 2355 netdev = alloc_etherdev_mq(sizeof(struct igb_adapter), 2356 IGB_MAX_TX_QUEUES); 2357 if (!netdev) 2358 goto err_alloc_etherdev; 2359 2360 SET_NETDEV_DEV(netdev, &pdev->dev); 2361 2362 pci_set_drvdata(pdev, netdev); 2363 adapter = netdev_priv(netdev); 2364 adapter->netdev = netdev; 2365 adapter->pdev = pdev; 2366 hw = &adapter->hw; 2367 hw->back = adapter; 2368 adapter->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE); 2369 2370 err = -EIO; 2371 adapter->io_addr = pci_iomap(pdev, 0, 0); 2372 if (!adapter->io_addr) 2373 goto err_ioremap; 2374 /* hw->hw_addr can be altered, we'll use adapter->io_addr for unmap */ 2375 hw->hw_addr = adapter->io_addr; 2376 2377 netdev->netdev_ops = &igb_netdev_ops; 2378 igb_set_ethtool_ops(netdev); 2379 netdev->watchdog_timeo = 5 * HZ; 2380 2381 strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1); 2382 2383 netdev->mem_start = pci_resource_start(pdev, 0); 2384 netdev->mem_end = pci_resource_end(pdev, 0); 2385 2386 /* PCI config space info */ 2387 hw->vendor_id = pdev->vendor; 2388 hw->device_id = pdev->device; 2389 hw->revision_id = pdev->revision; 2390 hw->subsystem_vendor_id = pdev->subsystem_vendor; 2391 hw->subsystem_device_id = pdev->subsystem_device; 2392 2393 /* Copy the default MAC, PHY and NVM function pointers */ 2394 memcpy(&hw->mac.ops, ei->mac_ops, sizeof(hw->mac.ops)); 2395 memcpy(&hw->phy.ops, ei->phy_ops, sizeof(hw->phy.ops)); 2396 memcpy(&hw->nvm.ops, ei->nvm_ops, sizeof(hw->nvm.ops)); 2397 /* Initialize skew-specific constants */ 2398 err = ei->get_invariants(hw); 2399 if (err) 2400 goto err_sw_init; 2401 2402 /* setup the private structure */ 2403 err = igb_sw_init(adapter); 2404 if (err) 2405 goto err_sw_init; 2406 2407 igb_get_bus_info_pcie(hw); 2408 2409 hw->phy.autoneg_wait_to_complete = false; 2410 2411 /* Copper options */ 2412 if (hw->phy.media_type == e1000_media_type_copper) { 2413 hw->phy.mdix = AUTO_ALL_MODES; 2414 hw->phy.disable_polarity_correction = false; 2415 hw->phy.ms_type = e1000_ms_hw_default; 2416 } 2417 2418 if (igb_check_reset_block(hw)) 2419 dev_info(&pdev->dev, 2420 "PHY reset is blocked due to SOL/IDER session.\n"); 2421 2422 /* features is initialized to 0 in allocation, it might have bits 2423 * set by igb_sw_init so we should use an or instead of an 2424 * assignment. 2425 */ 2426 netdev->features |= NETIF_F_SG | 2427 NETIF_F_TSO | 2428 NETIF_F_TSO6 | 2429 NETIF_F_RXHASH | 2430 NETIF_F_RXCSUM | 2431 NETIF_F_HW_CSUM; 2432 2433 if (hw->mac.type >= e1000_82576) 2434 netdev->features |= NETIF_F_SCTP_CRC; 2435 2436 #define IGB_GSO_PARTIAL_FEATURES (NETIF_F_GSO_GRE | \ 2437 NETIF_F_GSO_GRE_CSUM | \ 2438 NETIF_F_GSO_IPXIP4 | \ 2439 NETIF_F_GSO_IPXIP6 | \ 2440 NETIF_F_GSO_UDP_TUNNEL | \ 2441 NETIF_F_GSO_UDP_TUNNEL_CSUM) 2442 2443 netdev->gso_partial_features = IGB_GSO_PARTIAL_FEATURES; 2444 netdev->features |= NETIF_F_GSO_PARTIAL | IGB_GSO_PARTIAL_FEATURES; 2445 2446 /* copy netdev features into list of user selectable features */ 2447 netdev->hw_features |= netdev->features | 2448 NETIF_F_HW_VLAN_CTAG_RX | 2449 NETIF_F_HW_VLAN_CTAG_TX | 2450 NETIF_F_RXALL; 2451 2452 if (hw->mac.type >= e1000_i350) 2453 netdev->hw_features |= NETIF_F_NTUPLE; 2454 2455 if (pci_using_dac) 2456 netdev->features |= NETIF_F_HIGHDMA; 2457 2458 netdev->vlan_features |= netdev->features | NETIF_F_TSO_MANGLEID; 2459 netdev->mpls_features |= NETIF_F_HW_CSUM; 2460 netdev->hw_enc_features |= netdev->vlan_features; 2461 2462 /* set this bit last since it cannot be part of vlan_features */ 2463 netdev->features |= NETIF_F_HW_VLAN_CTAG_FILTER | 2464 NETIF_F_HW_VLAN_CTAG_RX | 2465 NETIF_F_HW_VLAN_CTAG_TX; 2466 2467 netdev->priv_flags |= IFF_SUPP_NOFCS; 2468 2469 netdev->priv_flags |= IFF_UNICAST_FLT; 2470 2471 /* MTU range: 68 - 9216 */ 2472 netdev->min_mtu = ETH_MIN_MTU; 2473 netdev->max_mtu = MAX_STD_JUMBO_FRAME_SIZE; 2474 2475 adapter->en_mng_pt = igb_enable_mng_pass_thru(hw); 2476 2477 /* before reading the NVM, reset the controller to put the device in a 2478 * known good starting state 2479 */ 2480 hw->mac.ops.reset_hw(hw); 2481 2482 /* make sure the NVM is good , i211/i210 parts can have special NVM 2483 * that doesn't contain a checksum 2484 */ 2485 switch (hw->mac.type) { 2486 case e1000_i210: 2487 case e1000_i211: 2488 if (igb_get_flash_presence_i210(hw)) { 2489 if (hw->nvm.ops.validate(hw) < 0) { 2490 dev_err(&pdev->dev, 2491 "The NVM Checksum Is Not Valid\n"); 2492 err = -EIO; 2493 goto err_eeprom; 2494 } 2495 } 2496 break; 2497 default: 2498 if (hw->nvm.ops.validate(hw) < 0) { 2499 dev_err(&pdev->dev, "The NVM Checksum Is Not Valid\n"); 2500 err = -EIO; 2501 goto err_eeprom; 2502 } 2503 break; 2504 } 2505 2506 if (eth_platform_get_mac_address(&pdev->dev, hw->mac.addr)) { 2507 /* copy the MAC address out of the NVM */ 2508 if (hw->mac.ops.read_mac_addr(hw)) 2509 dev_err(&pdev->dev, "NVM Read Error\n"); 2510 } 2511 2512 memcpy(netdev->dev_addr, hw->mac.addr, netdev->addr_len); 2513 2514 if (!is_valid_ether_addr(netdev->dev_addr)) { 2515 dev_err(&pdev->dev, "Invalid MAC Address\n"); 2516 err = -EIO; 2517 goto err_eeprom; 2518 } 2519 2520 /* get firmware version for ethtool -i */ 2521 igb_set_fw_version(adapter); 2522 2523 /* configure RXPBSIZE and TXPBSIZE */ 2524 if (hw->mac.type == e1000_i210) { 2525 wr32(E1000_RXPBS, I210_RXPBSIZE_DEFAULT); 2526 wr32(E1000_TXPBS, I210_TXPBSIZE_DEFAULT); 2527 } 2528 2529 setup_timer(&adapter->watchdog_timer, igb_watchdog, 2530 (unsigned long) adapter); 2531 setup_timer(&adapter->phy_info_timer, igb_update_phy_info, 2532 (unsigned long) adapter); 2533 2534 INIT_WORK(&adapter->reset_task, igb_reset_task); 2535 INIT_WORK(&adapter->watchdog_task, igb_watchdog_task); 2536 2537 /* Initialize link properties that are user-changeable */ 2538 adapter->fc_autoneg = true; 2539 hw->mac.autoneg = true; 2540 hw->phy.autoneg_advertised = 0x2f; 2541 2542 hw->fc.requested_mode = e1000_fc_default; 2543 hw->fc.current_mode = e1000_fc_default; 2544 2545 igb_validate_mdi_setting(hw); 2546 2547 /* By default, support wake on port A */ 2548 if (hw->bus.func == 0) 2549 adapter->flags |= IGB_FLAG_WOL_SUPPORTED; 2550 2551 /* Check the NVM for wake support on non-port A ports */ 2552 if (hw->mac.type >= e1000_82580) 2553 hw->nvm.ops.read(hw, NVM_INIT_CONTROL3_PORT_A + 2554 NVM_82580_LAN_FUNC_OFFSET(hw->bus.func), 1, 2555 &eeprom_data); 2556 else if (hw->bus.func == 1) 2557 hw->nvm.ops.read(hw, NVM_INIT_CONTROL3_PORT_B, 1, &eeprom_data); 2558 2559 if (eeprom_data & IGB_EEPROM_APME) 2560 adapter->flags |= IGB_FLAG_WOL_SUPPORTED; 2561 2562 /* now that we have the eeprom settings, apply the special cases where 2563 * the eeprom may be wrong or the board simply won't support wake on 2564 * lan on a particular port 2565 */ 2566 switch (pdev->device) { 2567 case E1000_DEV_ID_82575GB_QUAD_COPPER: 2568 adapter->flags &= ~IGB_FLAG_WOL_SUPPORTED; 2569 break; 2570 case E1000_DEV_ID_82575EB_FIBER_SERDES: 2571 case E1000_DEV_ID_82576_FIBER: 2572 case E1000_DEV_ID_82576_SERDES: 2573 /* Wake events only supported on port A for dual fiber 2574 * regardless of eeprom setting 2575 */ 2576 if (rd32(E1000_STATUS) & E1000_STATUS_FUNC_1) 2577 adapter->flags &= ~IGB_FLAG_WOL_SUPPORTED; 2578 break; 2579 case E1000_DEV_ID_82576_QUAD_COPPER: 2580 case E1000_DEV_ID_82576_QUAD_COPPER_ET2: 2581 /* if quad port adapter, disable WoL on all but port A */ 2582 if (global_quad_port_a != 0) 2583 adapter->flags &= ~IGB_FLAG_WOL_SUPPORTED; 2584 else 2585 adapter->flags |= IGB_FLAG_QUAD_PORT_A; 2586 /* Reset for multiple quad port adapters */ 2587 if (++global_quad_port_a == 4) 2588 global_quad_port_a = 0; 2589 break; 2590 default: 2591 /* If the device can't wake, don't set software support */ 2592 if (!device_can_wakeup(&adapter->pdev->dev)) 2593 adapter->flags &= ~IGB_FLAG_WOL_SUPPORTED; 2594 } 2595 2596 /* initialize the wol settings based on the eeprom settings */ 2597 if (adapter->flags & IGB_FLAG_WOL_SUPPORTED) 2598 adapter->wol |= E1000_WUFC_MAG; 2599 2600 /* Some vendors want WoL disabled by default, but still supported */ 2601 if ((hw->mac.type == e1000_i350) && 2602 (pdev->subsystem_vendor == PCI_VENDOR_ID_HP)) { 2603 adapter->flags |= IGB_FLAG_WOL_SUPPORTED; 2604 adapter->wol = 0; 2605 } 2606 2607 /* Some vendors want the ability to Use the EEPROM setting as 2608 * enable/disable only, and not for capability 2609 */ 2610 if (((hw->mac.type == e1000_i350) || 2611 (hw->mac.type == e1000_i354)) && 2612 (pdev->subsystem_vendor == PCI_VENDOR_ID_DELL)) { 2613 adapter->flags |= IGB_FLAG_WOL_SUPPORTED; 2614 adapter->wol = 0; 2615 } 2616 if (hw->mac.type == e1000_i350) { 2617 if (((pdev->subsystem_device == 0x5001) || 2618 (pdev->subsystem_device == 0x5002)) && 2619 (hw->bus.func == 0)) { 2620 adapter->flags |= IGB_FLAG_WOL_SUPPORTED; 2621 adapter->wol = 0; 2622 } 2623 if (pdev->subsystem_device == 0x1F52) 2624 adapter->flags |= IGB_FLAG_WOL_SUPPORTED; 2625 } 2626 2627 device_set_wakeup_enable(&adapter->pdev->dev, 2628 adapter->flags & IGB_FLAG_WOL_SUPPORTED); 2629 2630 /* reset the hardware with the new settings */ 2631 igb_reset(adapter); 2632 2633 /* Init the I2C interface */ 2634 err = igb_init_i2c(adapter); 2635 if (err) { 2636 dev_err(&pdev->dev, "failed to init i2c interface\n"); 2637 goto err_eeprom; 2638 } 2639 2640 /* let the f/w know that the h/w is now under the control of the 2641 * driver. 2642 */ 2643 igb_get_hw_control(adapter); 2644 2645 strcpy(netdev->name, "eth%d"); 2646 err = register_netdev(netdev); 2647 if (err) 2648 goto err_register; 2649 2650 /* carrier off reporting is important to ethtool even BEFORE open */ 2651 netif_carrier_off(netdev); 2652 2653 #ifdef CONFIG_IGB_DCA 2654 if (dca_add_requester(&pdev->dev) == 0) { 2655 adapter->flags |= IGB_FLAG_DCA_ENABLED; 2656 dev_info(&pdev->dev, "DCA enabled\n"); 2657 igb_setup_dca(adapter); 2658 } 2659 2660 #endif 2661 #ifdef CONFIG_IGB_HWMON 2662 /* Initialize the thermal sensor on i350 devices. */ 2663 if (hw->mac.type == e1000_i350 && hw->bus.func == 0) { 2664 u16 ets_word; 2665 2666 /* Read the NVM to determine if this i350 device supports an 2667 * external thermal sensor. 2668 */ 2669 hw->nvm.ops.read(hw, NVM_ETS_CFG, 1, &ets_word); 2670 if (ets_word != 0x0000 && ets_word != 0xFFFF) 2671 adapter->ets = true; 2672 else 2673 adapter->ets = false; 2674 if (igb_sysfs_init(adapter)) 2675 dev_err(&pdev->dev, 2676 "failed to allocate sysfs resources\n"); 2677 } else { 2678 adapter->ets = false; 2679 } 2680 #endif 2681 /* Check if Media Autosense is enabled */ 2682 adapter->ei = *ei; 2683 if (hw->dev_spec._82575.mas_capable) 2684 igb_init_mas(adapter); 2685 2686 /* do hw tstamp init after resetting */ 2687 igb_ptp_init(adapter); 2688 2689 dev_info(&pdev->dev, "Intel(R) Gigabit Ethernet Network Connection\n"); 2690 /* print bus type/speed/width info, not applicable to i354 */ 2691 if (hw->mac.type != e1000_i354) { 2692 dev_info(&pdev->dev, "%s: (PCIe:%s:%s) %pM\n", 2693 netdev->name, 2694 ((hw->bus.speed == e1000_bus_speed_2500) ? "2.5Gb/s" : 2695 (hw->bus.speed == e1000_bus_speed_5000) ? "5.0Gb/s" : 2696 "unknown"), 2697 ((hw->bus.width == e1000_bus_width_pcie_x4) ? 2698 "Width x4" : 2699 (hw->bus.width == e1000_bus_width_pcie_x2) ? 2700 "Width x2" : 2701 (hw->bus.width == e1000_bus_width_pcie_x1) ? 2702 "Width x1" : "unknown"), netdev->dev_addr); 2703 } 2704 2705 if ((hw->mac.type >= e1000_i210 || 2706 igb_get_flash_presence_i210(hw))) { 2707 ret_val = igb_read_part_string(hw, part_str, 2708 E1000_PBANUM_LENGTH); 2709 } else { 2710 ret_val = -E1000_ERR_INVM_VALUE_NOT_FOUND; 2711 } 2712 2713 if (ret_val) 2714 strcpy(part_str, "Unknown"); 2715 dev_info(&pdev->dev, "%s: PBA No: %s\n", netdev->name, part_str); 2716 dev_info(&pdev->dev, 2717 "Using %s interrupts. %d rx queue(s), %d tx queue(s)\n", 2718 (adapter->flags & IGB_FLAG_HAS_MSIX) ? "MSI-X" : 2719 (adapter->flags & IGB_FLAG_HAS_MSI) ? "MSI" : "legacy", 2720 adapter->num_rx_queues, adapter->num_tx_queues); 2721 if (hw->phy.media_type == e1000_media_type_copper) { 2722 switch (hw->mac.type) { 2723 case e1000_i350: 2724 case e1000_i210: 2725 case e1000_i211: 2726 /* Enable EEE for internal copper PHY devices */ 2727 err = igb_set_eee_i350(hw, true, true); 2728 if ((!err) && 2729 (!hw->dev_spec._82575.eee_disable)) { 2730 adapter->eee_advert = 2731 MDIO_EEE_100TX | MDIO_EEE_1000T; 2732 adapter->flags |= IGB_FLAG_EEE; 2733 } 2734 break; 2735 case e1000_i354: 2736 if ((rd32(E1000_CTRL_EXT) & 2737 E1000_CTRL_EXT_LINK_MODE_SGMII)) { 2738 err = igb_set_eee_i354(hw, true, true); 2739 if ((!err) && 2740 (!hw->dev_spec._82575.eee_disable)) { 2741 adapter->eee_advert = 2742 MDIO_EEE_100TX | MDIO_EEE_1000T; 2743 adapter->flags |= IGB_FLAG_EEE; 2744 } 2745 } 2746 break; 2747 default: 2748 break; 2749 } 2750 } 2751 pm_runtime_put_noidle(&pdev->dev); 2752 return 0; 2753 2754 err_register: 2755 igb_release_hw_control(adapter); 2756 memset(&adapter->i2c_adap, 0, sizeof(adapter->i2c_adap)); 2757 err_eeprom: 2758 if (!igb_check_reset_block(hw)) 2759 igb_reset_phy(hw); 2760 2761 if (hw->flash_address) 2762 iounmap(hw->flash_address); 2763 err_sw_init: 2764 kfree(adapter->shadow_vfta); 2765 igb_clear_interrupt_scheme(adapter); 2766 #ifdef CONFIG_PCI_IOV 2767 igb_disable_sriov(pdev); 2768 #endif 2769 pci_iounmap(pdev, adapter->io_addr); 2770 err_ioremap: 2771 free_netdev(netdev); 2772 err_alloc_etherdev: 2773 pci_release_mem_regions(pdev); 2774 err_pci_reg: 2775 err_dma: 2776 pci_disable_device(pdev); 2777 return err; 2778 } 2779 2780 #ifdef CONFIG_PCI_IOV 2781 static int igb_disable_sriov(struct pci_dev *pdev) 2782 { 2783 struct net_device *netdev = pci_get_drvdata(pdev); 2784 struct igb_adapter *adapter = netdev_priv(netdev); 2785 struct e1000_hw *hw = &adapter->hw; 2786 2787 /* reclaim resources allocated to VFs */ 2788 if (adapter->vf_data) { 2789 /* disable iov and allow time for transactions to clear */ 2790 if (pci_vfs_assigned(pdev)) { 2791 dev_warn(&pdev->dev, 2792 "Cannot deallocate SR-IOV virtual functions while they are assigned - VFs will not be deallocated\n"); 2793 return -EPERM; 2794 } else { 2795 pci_disable_sriov(pdev); 2796 msleep(500); 2797 } 2798 2799 kfree(adapter->vf_data); 2800 adapter->vf_data = NULL; 2801 adapter->vfs_allocated_count = 0; 2802 wr32(E1000_IOVCTL, E1000_IOVCTL_REUSE_VFQ); 2803 wrfl(); 2804 msleep(100); 2805 dev_info(&pdev->dev, "IOV Disabled\n"); 2806 2807 /* Re-enable DMA Coalescing flag since IOV is turned off */ 2808 adapter->flags |= IGB_FLAG_DMAC; 2809 } 2810 2811 return 0; 2812 } 2813 2814 static int igb_enable_sriov(struct pci_dev *pdev, int num_vfs) 2815 { 2816 struct net_device *netdev = pci_get_drvdata(pdev); 2817 struct igb_adapter *adapter = netdev_priv(netdev); 2818 int old_vfs = pci_num_vf(pdev); 2819 int err = 0; 2820 int i; 2821 2822 if (!(adapter->flags & IGB_FLAG_HAS_MSIX) || num_vfs > 7) { 2823 err = -EPERM; 2824 goto out; 2825 } 2826 if (!num_vfs) 2827 goto out; 2828 2829 if (old_vfs) { 2830 dev_info(&pdev->dev, "%d pre-allocated VFs found - override max_vfs setting of %d\n", 2831 old_vfs, max_vfs); 2832 adapter->vfs_allocated_count = old_vfs; 2833 } else 2834 adapter->vfs_allocated_count = num_vfs; 2835 2836 adapter->vf_data = kcalloc(adapter->vfs_allocated_count, 2837 sizeof(struct vf_data_storage), GFP_KERNEL); 2838 2839 /* if allocation failed then we do not support SR-IOV */ 2840 if (!adapter->vf_data) { 2841 adapter->vfs_allocated_count = 0; 2842 dev_err(&pdev->dev, 2843 "Unable to allocate memory for VF Data Storage\n"); 2844 err = -ENOMEM; 2845 goto out; 2846 } 2847 2848 /* only call pci_enable_sriov() if no VFs are allocated already */ 2849 if (!old_vfs) { 2850 err = pci_enable_sriov(pdev, adapter->vfs_allocated_count); 2851 if (err) 2852 goto err_out; 2853 } 2854 dev_info(&pdev->dev, "%d VFs allocated\n", 2855 adapter->vfs_allocated_count); 2856 for (i = 0; i < adapter->vfs_allocated_count; i++) 2857 igb_vf_configure(adapter, i); 2858 2859 /* DMA Coalescing is not supported in IOV mode. */ 2860 adapter->flags &= ~IGB_FLAG_DMAC; 2861 goto out; 2862 2863 err_out: 2864 kfree(adapter->vf_data); 2865 adapter->vf_data = NULL; 2866 adapter->vfs_allocated_count = 0; 2867 out: 2868 return err; 2869 } 2870 2871 #endif 2872 /** 2873 * igb_remove_i2c - Cleanup I2C interface 2874 * @adapter: pointer to adapter structure 2875 **/ 2876 static void igb_remove_i2c(struct igb_adapter *adapter) 2877 { 2878 /* free the adapter bus structure */ 2879 i2c_del_adapter(&adapter->i2c_adap); 2880 } 2881 2882 /** 2883 * igb_remove - Device Removal Routine 2884 * @pdev: PCI device information struct 2885 * 2886 * igb_remove is called by the PCI subsystem to alert the driver 2887 * that it should release a PCI device. The could be caused by a 2888 * Hot-Plug event, or because the driver is going to be removed from 2889 * memory. 2890 **/ 2891 static void igb_remove(struct pci_dev *pdev) 2892 { 2893 struct net_device *netdev = pci_get_drvdata(pdev); 2894 struct igb_adapter *adapter = netdev_priv(netdev); 2895 struct e1000_hw *hw = &adapter->hw; 2896 2897 pm_runtime_get_noresume(&pdev->dev); 2898 #ifdef CONFIG_IGB_HWMON 2899 igb_sysfs_exit(adapter); 2900 #endif 2901 igb_remove_i2c(adapter); 2902 igb_ptp_stop(adapter); 2903 /* The watchdog timer may be rescheduled, so explicitly 2904 * disable watchdog from being rescheduled. 2905 */ 2906 set_bit(__IGB_DOWN, &adapter->state); 2907 del_timer_sync(&adapter->watchdog_timer); 2908 del_timer_sync(&adapter->phy_info_timer); 2909 2910 cancel_work_sync(&adapter->reset_task); 2911 cancel_work_sync(&adapter->watchdog_task); 2912 2913 #ifdef CONFIG_IGB_DCA 2914 if (adapter->flags & IGB_FLAG_DCA_ENABLED) { 2915 dev_info(&pdev->dev, "DCA disabled\n"); 2916 dca_remove_requester(&pdev->dev); 2917 adapter->flags &= ~IGB_FLAG_DCA_ENABLED; 2918 wr32(E1000_DCA_CTRL, E1000_DCA_CTRL_DCA_MODE_DISABLE); 2919 } 2920 #endif 2921 2922 /* Release control of h/w to f/w. If f/w is AMT enabled, this 2923 * would have already happened in close and is redundant. 2924 */ 2925 igb_release_hw_control(adapter); 2926 2927 #ifdef CONFIG_PCI_IOV 2928 igb_disable_sriov(pdev); 2929 #endif 2930 2931 unregister_netdev(netdev); 2932 2933 igb_clear_interrupt_scheme(adapter); 2934 2935 pci_iounmap(pdev, adapter->io_addr); 2936 if (hw->flash_address) 2937 iounmap(hw->flash_address); 2938 pci_release_mem_regions(pdev); 2939 2940 kfree(adapter->shadow_vfta); 2941 free_netdev(netdev); 2942 2943 pci_disable_pcie_error_reporting(pdev); 2944 2945 pci_disable_device(pdev); 2946 } 2947 2948 /** 2949 * igb_probe_vfs - Initialize vf data storage and add VFs to pci config space 2950 * @adapter: board private structure to initialize 2951 * 2952 * This function initializes the vf specific data storage and then attempts to 2953 * allocate the VFs. The reason for ordering it this way is because it is much 2954 * mor expensive time wise to disable SR-IOV than it is to allocate and free 2955 * the memory for the VFs. 2956 **/ 2957 static void igb_probe_vfs(struct igb_adapter *adapter) 2958 { 2959 #ifdef CONFIG_PCI_IOV 2960 struct pci_dev *pdev = adapter->pdev; 2961 struct e1000_hw *hw = &adapter->hw; 2962 2963 /* Virtualization features not supported on i210 family. */ 2964 if ((hw->mac.type == e1000_i210) || (hw->mac.type == e1000_i211)) 2965 return; 2966 2967 /* Of the below we really only want the effect of getting 2968 * IGB_FLAG_HAS_MSIX set (if available), without which 2969 * igb_enable_sriov() has no effect. 2970 */ 2971 igb_set_interrupt_capability(adapter, true); 2972 igb_reset_interrupt_capability(adapter); 2973 2974 pci_sriov_set_totalvfs(pdev, 7); 2975 igb_enable_sriov(pdev, max_vfs); 2976 2977 #endif /* CONFIG_PCI_IOV */ 2978 } 2979 2980 static void igb_init_queue_configuration(struct igb_adapter *adapter) 2981 { 2982 struct e1000_hw *hw = &adapter->hw; 2983 u32 max_rss_queues; 2984 2985 /* Determine the maximum number of RSS queues supported. */ 2986 switch (hw->mac.type) { 2987 case e1000_i211: 2988 max_rss_queues = IGB_MAX_RX_QUEUES_I211; 2989 break; 2990 case e1000_82575: 2991 case e1000_i210: 2992 max_rss_queues = IGB_MAX_RX_QUEUES_82575; 2993 break; 2994 case e1000_i350: 2995 /* I350 cannot do RSS and SR-IOV at the same time */ 2996 if (!!adapter->vfs_allocated_count) { 2997 max_rss_queues = 1; 2998 break; 2999 } 3000 /* fall through */ 3001 case e1000_82576: 3002 if (!!adapter->vfs_allocated_count) { 3003 max_rss_queues = 2; 3004 break; 3005 } 3006 /* fall through */ 3007 case e1000_82580: 3008 case e1000_i354: 3009 default: 3010 max_rss_queues = IGB_MAX_RX_QUEUES; 3011 break; 3012 } 3013 3014 adapter->rss_queues = min_t(u32, max_rss_queues, num_online_cpus()); 3015 3016 igb_set_flag_queue_pairs(adapter, max_rss_queues); 3017 } 3018 3019 void igb_set_flag_queue_pairs(struct igb_adapter *adapter, 3020 const u32 max_rss_queues) 3021 { 3022 struct e1000_hw *hw = &adapter->hw; 3023 3024 /* Determine if we need to pair queues. */ 3025 switch (hw->mac.type) { 3026 case e1000_82575: 3027 case e1000_i211: 3028 /* Device supports enough interrupts without queue pairing. */ 3029 break; 3030 case e1000_82576: 3031 case e1000_82580: 3032 case e1000_i350: 3033 case e1000_i354: 3034 case e1000_i210: 3035 default: 3036 /* If rss_queues > half of max_rss_queues, pair the queues in 3037 * order to conserve interrupts due to limited supply. 3038 */ 3039 if (adapter->rss_queues > (max_rss_queues / 2)) 3040 adapter->flags |= IGB_FLAG_QUEUE_PAIRS; 3041 else 3042 adapter->flags &= ~IGB_FLAG_QUEUE_PAIRS; 3043 break; 3044 } 3045 } 3046 3047 /** 3048 * igb_sw_init - Initialize general software structures (struct igb_adapter) 3049 * @adapter: board private structure to initialize 3050 * 3051 * igb_sw_init initializes the Adapter private data structure. 3052 * Fields are initialized based on PCI device information and 3053 * OS network device settings (MTU size). 3054 **/ 3055 static int igb_sw_init(struct igb_adapter *adapter) 3056 { 3057 struct e1000_hw *hw = &adapter->hw; 3058 struct net_device *netdev = adapter->netdev; 3059 struct pci_dev *pdev = adapter->pdev; 3060 3061 pci_read_config_word(pdev, PCI_COMMAND, &hw->bus.pci_cmd_word); 3062 3063 /* set default ring sizes */ 3064 adapter->tx_ring_count = IGB_DEFAULT_TXD; 3065 adapter->rx_ring_count = IGB_DEFAULT_RXD; 3066 3067 /* set default ITR values */ 3068 adapter->rx_itr_setting = IGB_DEFAULT_ITR; 3069 adapter->tx_itr_setting = IGB_DEFAULT_ITR; 3070 3071 /* set default work limits */ 3072 adapter->tx_work_limit = IGB_DEFAULT_TX_WORK; 3073 3074 adapter->max_frame_size = netdev->mtu + ETH_HLEN + ETH_FCS_LEN + 3075 VLAN_HLEN; 3076 adapter->min_frame_size = ETH_ZLEN + ETH_FCS_LEN; 3077 3078 spin_lock_init(&adapter->nfc_lock); 3079 spin_lock_init(&adapter->stats64_lock); 3080 #ifdef CONFIG_PCI_IOV 3081 switch (hw->mac.type) { 3082 case e1000_82576: 3083 case e1000_i350: 3084 if (max_vfs > 7) { 3085 dev_warn(&pdev->dev, 3086 "Maximum of 7 VFs per PF, using max\n"); 3087 max_vfs = adapter->vfs_allocated_count = 7; 3088 } else 3089 adapter->vfs_allocated_count = max_vfs; 3090 if (adapter->vfs_allocated_count) 3091 dev_warn(&pdev->dev, 3092 "Enabling SR-IOV VFs using the module parameter is deprecated - please use the pci sysfs interface.\n"); 3093 break; 3094 default: 3095 break; 3096 } 3097 #endif /* CONFIG_PCI_IOV */ 3098 3099 /* Assume MSI-X interrupts, will be checked during IRQ allocation */ 3100 adapter->flags |= IGB_FLAG_HAS_MSIX; 3101 3102 igb_probe_vfs(adapter); 3103 3104 igb_init_queue_configuration(adapter); 3105 3106 /* Setup and initialize a copy of the hw vlan table array */ 3107 adapter->shadow_vfta = kcalloc(E1000_VLAN_FILTER_TBL_SIZE, sizeof(u32), 3108 GFP_ATOMIC); 3109 3110 /* This call may decrease the number of queues */ 3111 if (igb_init_interrupt_scheme(adapter, true)) { 3112 dev_err(&pdev->dev, "Unable to allocate memory for queues\n"); 3113 return -ENOMEM; 3114 } 3115 3116 /* Explicitly disable IRQ since the NIC can be in any state. */ 3117 igb_irq_disable(adapter); 3118 3119 if (hw->mac.type >= e1000_i350) 3120 adapter->flags &= ~IGB_FLAG_DMAC; 3121 3122 set_bit(__IGB_DOWN, &adapter->state); 3123 return 0; 3124 } 3125 3126 /** 3127 * igb_open - Called when a network interface is made active 3128 * @netdev: network interface device structure 3129 * 3130 * Returns 0 on success, negative value on failure 3131 * 3132 * The open entry point is called when a network interface is made 3133 * active by the system (IFF_UP). At this point all resources needed 3134 * for transmit and receive operations are allocated, the interrupt 3135 * handler is registered with the OS, the watchdog timer is started, 3136 * and the stack is notified that the interface is ready. 3137 **/ 3138 static int __igb_open(struct net_device *netdev, bool resuming) 3139 { 3140 struct igb_adapter *adapter = netdev_priv(netdev); 3141 struct e1000_hw *hw = &adapter->hw; 3142 struct pci_dev *pdev = adapter->pdev; 3143 int err; 3144 int i; 3145 3146 /* disallow open during test */ 3147 if (test_bit(__IGB_TESTING, &adapter->state)) { 3148 WARN_ON(resuming); 3149 return -EBUSY; 3150 } 3151 3152 if (!resuming) 3153 pm_runtime_get_sync(&pdev->dev); 3154 3155 netif_carrier_off(netdev); 3156 3157 /* allocate transmit descriptors */ 3158 err = igb_setup_all_tx_resources(adapter); 3159 if (err) 3160 goto err_setup_tx; 3161 3162 /* allocate receive descriptors */ 3163 err = igb_setup_all_rx_resources(adapter); 3164 if (err) 3165 goto err_setup_rx; 3166 3167 igb_power_up_link(adapter); 3168 3169 /* before we allocate an interrupt, we must be ready to handle it. 3170 * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt 3171 * as soon as we call pci_request_irq, so we have to setup our 3172 * clean_rx handler before we do so. 3173 */ 3174 igb_configure(adapter); 3175 3176 err = igb_request_irq(adapter); 3177 if (err) 3178 goto err_req_irq; 3179 3180 /* Notify the stack of the actual queue counts. */ 3181 err = netif_set_real_num_tx_queues(adapter->netdev, 3182 adapter->num_tx_queues); 3183 if (err) 3184 goto err_set_queues; 3185 3186 err = netif_set_real_num_rx_queues(adapter->netdev, 3187 adapter->num_rx_queues); 3188 if (err) 3189 goto err_set_queues; 3190 3191 /* From here on the code is the same as igb_up() */ 3192 clear_bit(__IGB_DOWN, &adapter->state); 3193 3194 for (i = 0; i < adapter->num_q_vectors; i++) 3195 napi_enable(&(adapter->q_vector[i]->napi)); 3196 3197 /* Clear any pending interrupts. */ 3198 rd32(E1000_ICR); 3199 3200 igb_irq_enable(adapter); 3201 3202 /* notify VFs that reset has been completed */ 3203 if (adapter->vfs_allocated_count) { 3204 u32 reg_data = rd32(E1000_CTRL_EXT); 3205 3206 reg_data |= E1000_CTRL_EXT_PFRSTD; 3207 wr32(E1000_CTRL_EXT, reg_data); 3208 } 3209 3210 netif_tx_start_all_queues(netdev); 3211 3212 if (!resuming) 3213 pm_runtime_put(&pdev->dev); 3214 3215 /* start the watchdog. */ 3216 hw->mac.get_link_status = 1; 3217 schedule_work(&adapter->watchdog_task); 3218 3219 return 0; 3220 3221 err_set_queues: 3222 igb_free_irq(adapter); 3223 err_req_irq: 3224 igb_release_hw_control(adapter); 3225 igb_power_down_link(adapter); 3226 igb_free_all_rx_resources(adapter); 3227 err_setup_rx: 3228 igb_free_all_tx_resources(adapter); 3229 err_setup_tx: 3230 igb_reset(adapter); 3231 if (!resuming) 3232 pm_runtime_put(&pdev->dev); 3233 3234 return err; 3235 } 3236 3237 int igb_open(struct net_device *netdev) 3238 { 3239 return __igb_open(netdev, false); 3240 } 3241 3242 /** 3243 * igb_close - Disables a network interface 3244 * @netdev: network interface device structure 3245 * 3246 * Returns 0, this is not allowed to fail 3247 * 3248 * The close entry point is called when an interface is de-activated 3249 * by the OS. The hardware is still under the driver's control, but 3250 * needs to be disabled. A global MAC reset is issued to stop the 3251 * hardware, and all transmit and receive resources are freed. 3252 **/ 3253 static int __igb_close(struct net_device *netdev, bool suspending) 3254 { 3255 struct igb_adapter *adapter = netdev_priv(netdev); 3256 struct pci_dev *pdev = adapter->pdev; 3257 3258 WARN_ON(test_bit(__IGB_RESETTING, &adapter->state)); 3259 3260 if (!suspending) 3261 pm_runtime_get_sync(&pdev->dev); 3262 3263 igb_down(adapter); 3264 igb_free_irq(adapter); 3265 3266 igb_nfc_filter_exit(adapter); 3267 3268 igb_free_all_tx_resources(adapter); 3269 igb_free_all_rx_resources(adapter); 3270 3271 if (!suspending) 3272 pm_runtime_put_sync(&pdev->dev); 3273 return 0; 3274 } 3275 3276 int igb_close(struct net_device *netdev) 3277 { 3278 if (netif_device_present(netdev)) 3279 return __igb_close(netdev, false); 3280 return 0; 3281 } 3282 3283 /** 3284 * igb_setup_tx_resources - allocate Tx resources (Descriptors) 3285 * @tx_ring: tx descriptor ring (for a specific queue) to setup 3286 * 3287 * Return 0 on success, negative on failure 3288 **/ 3289 int igb_setup_tx_resources(struct igb_ring *tx_ring) 3290 { 3291 struct device *dev = tx_ring->dev; 3292 int size; 3293 3294 size = sizeof(struct igb_tx_buffer) * tx_ring->count; 3295 3296 tx_ring->tx_buffer_info = vzalloc(size); 3297 if (!tx_ring->tx_buffer_info) 3298 goto err; 3299 3300 /* round up to nearest 4K */ 3301 tx_ring->size = tx_ring->count * sizeof(union e1000_adv_tx_desc); 3302 tx_ring->size = ALIGN(tx_ring->size, 4096); 3303 3304 tx_ring->desc = dma_alloc_coherent(dev, tx_ring->size, 3305 &tx_ring->dma, GFP_KERNEL); 3306 if (!tx_ring->desc) 3307 goto err; 3308 3309 tx_ring->next_to_use = 0; 3310 tx_ring->next_to_clean = 0; 3311 3312 return 0; 3313 3314 err: 3315 vfree(tx_ring->tx_buffer_info); 3316 tx_ring->tx_buffer_info = NULL; 3317 dev_err(dev, "Unable to allocate memory for the Tx descriptor ring\n"); 3318 return -ENOMEM; 3319 } 3320 3321 /** 3322 * igb_setup_all_tx_resources - wrapper to allocate Tx resources 3323 * (Descriptors) for all queues 3324 * @adapter: board private structure 3325 * 3326 * Return 0 on success, negative on failure 3327 **/ 3328 static int igb_setup_all_tx_resources(struct igb_adapter *adapter) 3329 { 3330 struct pci_dev *pdev = adapter->pdev; 3331 int i, err = 0; 3332 3333 for (i = 0; i < adapter->num_tx_queues; i++) { 3334 err = igb_setup_tx_resources(adapter->tx_ring[i]); 3335 if (err) { 3336 dev_err(&pdev->dev, 3337 "Allocation for Tx Queue %u failed\n", i); 3338 for (i--; i >= 0; i--) 3339 igb_free_tx_resources(adapter->tx_ring[i]); 3340 break; 3341 } 3342 } 3343 3344 return err; 3345 } 3346 3347 /** 3348 * igb_setup_tctl - configure the transmit control registers 3349 * @adapter: Board private structure 3350 **/ 3351 void igb_setup_tctl(struct igb_adapter *adapter) 3352 { 3353 struct e1000_hw *hw = &adapter->hw; 3354 u32 tctl; 3355 3356 /* disable queue 0 which is enabled by default on 82575 and 82576 */ 3357 wr32(E1000_TXDCTL(0), 0); 3358 3359 /* Program the Transmit Control Register */ 3360 tctl = rd32(E1000_TCTL); 3361 tctl &= ~E1000_TCTL_CT; 3362 tctl |= E1000_TCTL_PSP | E1000_TCTL_RTLC | 3363 (E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT); 3364 3365 igb_config_collision_dist(hw); 3366 3367 /* Enable transmits */ 3368 tctl |= E1000_TCTL_EN; 3369 3370 wr32(E1000_TCTL, tctl); 3371 } 3372 3373 /** 3374 * igb_configure_tx_ring - Configure transmit ring after Reset 3375 * @adapter: board private structure 3376 * @ring: tx ring to configure 3377 * 3378 * Configure a transmit ring after a reset. 3379 **/ 3380 void igb_configure_tx_ring(struct igb_adapter *adapter, 3381 struct igb_ring *ring) 3382 { 3383 struct e1000_hw *hw = &adapter->hw; 3384 u32 txdctl = 0; 3385 u64 tdba = ring->dma; 3386 int reg_idx = ring->reg_idx; 3387 3388 /* disable the queue */ 3389 wr32(E1000_TXDCTL(reg_idx), 0); 3390 wrfl(); 3391 mdelay(10); 3392 3393 wr32(E1000_TDLEN(reg_idx), 3394 ring->count * sizeof(union e1000_adv_tx_desc)); 3395 wr32(E1000_TDBAL(reg_idx), 3396 tdba & 0x00000000ffffffffULL); 3397 wr32(E1000_TDBAH(reg_idx), tdba >> 32); 3398 3399 ring->tail = adapter->io_addr + E1000_TDT(reg_idx); 3400 wr32(E1000_TDH(reg_idx), 0); 3401 writel(0, ring->tail); 3402 3403 txdctl |= IGB_TX_PTHRESH; 3404 txdctl |= IGB_TX_HTHRESH << 8; 3405 txdctl |= IGB_TX_WTHRESH << 16; 3406 3407 txdctl |= E1000_TXDCTL_QUEUE_ENABLE; 3408 wr32(E1000_TXDCTL(reg_idx), txdctl); 3409 } 3410 3411 /** 3412 * igb_configure_tx - Configure transmit Unit after Reset 3413 * @adapter: board private structure 3414 * 3415 * Configure the Tx unit of the MAC after a reset. 3416 **/ 3417 static void igb_configure_tx(struct igb_adapter *adapter) 3418 { 3419 int i; 3420 3421 for (i = 0; i < adapter->num_tx_queues; i++) 3422 igb_configure_tx_ring(adapter, adapter->tx_ring[i]); 3423 } 3424 3425 /** 3426 * igb_setup_rx_resources - allocate Rx resources (Descriptors) 3427 * @rx_ring: Rx descriptor ring (for a specific queue) to setup 3428 * 3429 * Returns 0 on success, negative on failure 3430 **/ 3431 int igb_setup_rx_resources(struct igb_ring *rx_ring) 3432 { 3433 struct device *dev = rx_ring->dev; 3434 int size; 3435 3436 size = sizeof(struct igb_rx_buffer) * rx_ring->count; 3437 3438 rx_ring->rx_buffer_info = vzalloc(size); 3439 if (!rx_ring->rx_buffer_info) 3440 goto err; 3441 3442 /* Round up to nearest 4K */ 3443 rx_ring->size = rx_ring->count * sizeof(union e1000_adv_rx_desc); 3444 rx_ring->size = ALIGN(rx_ring->size, 4096); 3445 3446 rx_ring->desc = dma_alloc_coherent(dev, rx_ring->size, 3447 &rx_ring->dma, GFP_KERNEL); 3448 if (!rx_ring->desc) 3449 goto err; 3450 3451 rx_ring->next_to_alloc = 0; 3452 rx_ring->next_to_clean = 0; 3453 rx_ring->next_to_use = 0; 3454 3455 return 0; 3456 3457 err: 3458 vfree(rx_ring->rx_buffer_info); 3459 rx_ring->rx_buffer_info = NULL; 3460 dev_err(dev, "Unable to allocate memory for the Rx descriptor ring\n"); 3461 return -ENOMEM; 3462 } 3463 3464 /** 3465 * igb_setup_all_rx_resources - wrapper to allocate Rx resources 3466 * (Descriptors) for all queues 3467 * @adapter: board private structure 3468 * 3469 * Return 0 on success, negative on failure 3470 **/ 3471 static int igb_setup_all_rx_resources(struct igb_adapter *adapter) 3472 { 3473 struct pci_dev *pdev = adapter->pdev; 3474 int i, err = 0; 3475 3476 for (i = 0; i < adapter->num_rx_queues; i++) { 3477 err = igb_setup_rx_resources(adapter->rx_ring[i]); 3478 if (err) { 3479 dev_err(&pdev->dev, 3480 "Allocation for Rx Queue %u failed\n", i); 3481 for (i--; i >= 0; i--) 3482 igb_free_rx_resources(adapter->rx_ring[i]); 3483 break; 3484 } 3485 } 3486 3487 return err; 3488 } 3489 3490 /** 3491 * igb_setup_mrqc - configure the multiple receive queue control registers 3492 * @adapter: Board private structure 3493 **/ 3494 static void igb_setup_mrqc(struct igb_adapter *adapter) 3495 { 3496 struct e1000_hw *hw = &adapter->hw; 3497 u32 mrqc, rxcsum; 3498 u32 j, num_rx_queues; 3499 u32 rss_key[10]; 3500 3501 netdev_rss_key_fill(rss_key, sizeof(rss_key)); 3502 for (j = 0; j < 10; j++) 3503 wr32(E1000_RSSRK(j), rss_key[j]); 3504 3505 num_rx_queues = adapter->rss_queues; 3506 3507 switch (hw->mac.type) { 3508 case e1000_82576: 3509 /* 82576 supports 2 RSS queues for SR-IOV */ 3510 if (adapter->vfs_allocated_count) 3511 num_rx_queues = 2; 3512 break; 3513 default: 3514 break; 3515 } 3516 3517 if (adapter->rss_indir_tbl_init != num_rx_queues) { 3518 for (j = 0; j < IGB_RETA_SIZE; j++) 3519 adapter->rss_indir_tbl[j] = 3520 (j * num_rx_queues) / IGB_RETA_SIZE; 3521 adapter->rss_indir_tbl_init = num_rx_queues; 3522 } 3523 igb_write_rss_indir_tbl(adapter); 3524 3525 /* Disable raw packet checksumming so that RSS hash is placed in 3526 * descriptor on writeback. No need to enable TCP/UDP/IP checksum 3527 * offloads as they are enabled by default 3528 */ 3529 rxcsum = rd32(E1000_RXCSUM); 3530 rxcsum |= E1000_RXCSUM_PCSD; 3531 3532 if (adapter->hw.mac.type >= e1000_82576) 3533 /* Enable Receive Checksum Offload for SCTP */ 3534 rxcsum |= E1000_RXCSUM_CRCOFL; 3535 3536 /* Don't need to set TUOFL or IPOFL, they default to 1 */ 3537 wr32(E1000_RXCSUM, rxcsum); 3538 3539 /* Generate RSS hash based on packet types, TCP/UDP 3540 * port numbers and/or IPv4/v6 src and dst addresses 3541 */ 3542 mrqc = E1000_MRQC_RSS_FIELD_IPV4 | 3543 E1000_MRQC_RSS_FIELD_IPV4_TCP | 3544 E1000_MRQC_RSS_FIELD_IPV6 | 3545 E1000_MRQC_RSS_FIELD_IPV6_TCP | 3546 E1000_MRQC_RSS_FIELD_IPV6_TCP_EX; 3547 3548 if (adapter->flags & IGB_FLAG_RSS_FIELD_IPV4_UDP) 3549 mrqc |= E1000_MRQC_RSS_FIELD_IPV4_UDP; 3550 if (adapter->flags & IGB_FLAG_RSS_FIELD_IPV6_UDP) 3551 mrqc |= E1000_MRQC_RSS_FIELD_IPV6_UDP; 3552 3553 /* If VMDq is enabled then we set the appropriate mode for that, else 3554 * we default to RSS so that an RSS hash is calculated per packet even 3555 * if we are only using one queue 3556 */ 3557 if (adapter->vfs_allocated_count) { 3558 if (hw->mac.type > e1000_82575) { 3559 /* Set the default pool for the PF's first queue */ 3560 u32 vtctl = rd32(E1000_VT_CTL); 3561 3562 vtctl &= ~(E1000_VT_CTL_DEFAULT_POOL_MASK | 3563 E1000_VT_CTL_DISABLE_DEF_POOL); 3564 vtctl |= adapter->vfs_allocated_count << 3565 E1000_VT_CTL_DEFAULT_POOL_SHIFT; 3566 wr32(E1000_VT_CTL, vtctl); 3567 } 3568 if (adapter->rss_queues > 1) 3569 mrqc |= E1000_MRQC_ENABLE_VMDQ_RSS_MQ; 3570 else 3571 mrqc |= E1000_MRQC_ENABLE_VMDQ; 3572 } else { 3573 if (hw->mac.type != e1000_i211) 3574 mrqc |= E1000_MRQC_ENABLE_RSS_MQ; 3575 } 3576 igb_vmm_control(adapter); 3577 3578 wr32(E1000_MRQC, mrqc); 3579 } 3580 3581 /** 3582 * igb_setup_rctl - configure the receive control registers 3583 * @adapter: Board private structure 3584 **/ 3585 void igb_setup_rctl(struct igb_adapter *adapter) 3586 { 3587 struct e1000_hw *hw = &adapter->hw; 3588 u32 rctl; 3589 3590 rctl = rd32(E1000_RCTL); 3591 3592 rctl &= ~(3 << E1000_RCTL_MO_SHIFT); 3593 rctl &= ~(E1000_RCTL_LBM_TCVR | E1000_RCTL_LBM_MAC); 3594 3595 rctl |= E1000_RCTL_EN | E1000_RCTL_BAM | E1000_RCTL_RDMTS_HALF | 3596 (hw->mac.mc_filter_type << E1000_RCTL_MO_SHIFT); 3597 3598 /* enable stripping of CRC. It's unlikely this will break BMC 3599 * redirection as it did with e1000. Newer features require 3600 * that the HW strips the CRC. 3601 */ 3602 rctl |= E1000_RCTL_SECRC; 3603 3604 /* disable store bad packets and clear size bits. */ 3605 rctl &= ~(E1000_RCTL_SBP | E1000_RCTL_SZ_256); 3606 3607 /* enable LPE to allow for reception of jumbo frames */ 3608 rctl |= E1000_RCTL_LPE; 3609 3610 /* disable queue 0 to prevent tail write w/o re-config */ 3611 wr32(E1000_RXDCTL(0), 0); 3612 3613 /* Attention!!! For SR-IOV PF driver operations you must enable 3614 * queue drop for all VF and PF queues to prevent head of line blocking 3615 * if an un-trusted VF does not provide descriptors to hardware. 3616 */ 3617 if (adapter->vfs_allocated_count) { 3618 /* set all queue drop enable bits */ 3619 wr32(E1000_QDE, ALL_QUEUES); 3620 } 3621 3622 /* This is useful for sniffing bad packets. */ 3623 if (adapter->netdev->features & NETIF_F_RXALL) { 3624 /* UPE and MPE will be handled by normal PROMISC logic 3625 * in e1000e_set_rx_mode 3626 */ 3627 rctl |= (E1000_RCTL_SBP | /* Receive bad packets */ 3628 E1000_RCTL_BAM | /* RX All Bcast Pkts */ 3629 E1000_RCTL_PMCF); /* RX All MAC Ctrl Pkts */ 3630 3631 rctl &= ~(E1000_RCTL_DPF | /* Allow filtered pause */ 3632 E1000_RCTL_CFIEN); /* Dis VLAN CFIEN Filter */ 3633 /* Do not mess with E1000_CTRL_VME, it affects transmit as well, 3634 * and that breaks VLANs. 3635 */ 3636 } 3637 3638 wr32(E1000_RCTL, rctl); 3639 } 3640 3641 static inline int igb_set_vf_rlpml(struct igb_adapter *adapter, int size, 3642 int vfn) 3643 { 3644 struct e1000_hw *hw = &adapter->hw; 3645 u32 vmolr; 3646 3647 if (size > MAX_JUMBO_FRAME_SIZE) 3648 size = MAX_JUMBO_FRAME_SIZE; 3649 3650 vmolr = rd32(E1000_VMOLR(vfn)); 3651 vmolr &= ~E1000_VMOLR_RLPML_MASK; 3652 vmolr |= size | E1000_VMOLR_LPE; 3653 wr32(E1000_VMOLR(vfn), vmolr); 3654 3655 return 0; 3656 } 3657 3658 static inline void igb_set_vf_vlan_strip(struct igb_adapter *adapter, 3659 int vfn, bool enable) 3660 { 3661 struct e1000_hw *hw = &adapter->hw; 3662 u32 val, reg; 3663 3664 if (hw->mac.type < e1000_82576) 3665 return; 3666 3667 if (hw->mac.type == e1000_i350) 3668 reg = E1000_DVMOLR(vfn); 3669 else 3670 reg = E1000_VMOLR(vfn); 3671 3672 val = rd32(reg); 3673 if (enable) 3674 val |= E1000_VMOLR_STRVLAN; 3675 else 3676 val &= ~(E1000_VMOLR_STRVLAN); 3677 wr32(reg, val); 3678 } 3679 3680 static inline void igb_set_vmolr(struct igb_adapter *adapter, 3681 int vfn, bool aupe) 3682 { 3683 struct e1000_hw *hw = &adapter->hw; 3684 u32 vmolr; 3685 3686 /* This register exists only on 82576 and newer so if we are older then 3687 * we should exit and do nothing 3688 */ 3689 if (hw->mac.type < e1000_82576) 3690 return; 3691 3692 vmolr = rd32(E1000_VMOLR(vfn)); 3693 if (aupe) 3694 vmolr |= E1000_VMOLR_AUPE; /* Accept untagged packets */ 3695 else 3696 vmolr &= ~(E1000_VMOLR_AUPE); /* Tagged packets ONLY */ 3697 3698 /* clear all bits that might not be set */ 3699 vmolr &= ~(E1000_VMOLR_BAM | E1000_VMOLR_RSSE); 3700 3701 if (adapter->rss_queues > 1 && vfn == adapter->vfs_allocated_count) 3702 vmolr |= E1000_VMOLR_RSSE; /* enable RSS */ 3703 /* for VMDq only allow the VFs and pool 0 to accept broadcast and 3704 * multicast packets 3705 */ 3706 if (vfn <= adapter->vfs_allocated_count) 3707 vmolr |= E1000_VMOLR_BAM; /* Accept broadcast */ 3708 3709 wr32(E1000_VMOLR(vfn), vmolr); 3710 } 3711 3712 /** 3713 * igb_configure_rx_ring - Configure a receive ring after Reset 3714 * @adapter: board private structure 3715 * @ring: receive ring to be configured 3716 * 3717 * Configure the Rx unit of the MAC after a reset. 3718 **/ 3719 void igb_configure_rx_ring(struct igb_adapter *adapter, 3720 struct igb_ring *ring) 3721 { 3722 struct e1000_hw *hw = &adapter->hw; 3723 u64 rdba = ring->dma; 3724 int reg_idx = ring->reg_idx; 3725 u32 srrctl = 0, rxdctl = 0; 3726 3727 /* disable the queue */ 3728 wr32(E1000_RXDCTL(reg_idx), 0); 3729 3730 /* Set DMA base address registers */ 3731 wr32(E1000_RDBAL(reg_idx), 3732 rdba & 0x00000000ffffffffULL); 3733 wr32(E1000_RDBAH(reg_idx), rdba >> 32); 3734 wr32(E1000_RDLEN(reg_idx), 3735 ring->count * sizeof(union e1000_adv_rx_desc)); 3736 3737 /* initialize head and tail */ 3738 ring->tail = adapter->io_addr + E1000_RDT(reg_idx); 3739 wr32(E1000_RDH(reg_idx), 0); 3740 writel(0, ring->tail); 3741 3742 /* set descriptor configuration */ 3743 srrctl = IGB_RX_HDR_LEN << E1000_SRRCTL_BSIZEHDRSIZE_SHIFT; 3744 srrctl |= IGB_RX_BUFSZ >> E1000_SRRCTL_BSIZEPKT_SHIFT; 3745 srrctl |= E1000_SRRCTL_DESCTYPE_ADV_ONEBUF; 3746 if (hw->mac.type >= e1000_82580) 3747 srrctl |= E1000_SRRCTL_TIMESTAMP; 3748 /* Only set Drop Enable if we are supporting multiple queues */ 3749 if (adapter->vfs_allocated_count || adapter->num_rx_queues > 1) 3750 srrctl |= E1000_SRRCTL_DROP_EN; 3751 3752 wr32(E1000_SRRCTL(reg_idx), srrctl); 3753 3754 /* set filtering for VMDQ pools */ 3755 igb_set_vmolr(adapter, reg_idx & 0x7, true); 3756 3757 rxdctl |= IGB_RX_PTHRESH; 3758 rxdctl |= IGB_RX_HTHRESH << 8; 3759 rxdctl |= IGB_RX_WTHRESH << 16; 3760 3761 /* enable receive descriptor fetching */ 3762 rxdctl |= E1000_RXDCTL_QUEUE_ENABLE; 3763 wr32(E1000_RXDCTL(reg_idx), rxdctl); 3764 } 3765 3766 /** 3767 * igb_configure_rx - Configure receive Unit after Reset 3768 * @adapter: board private structure 3769 * 3770 * Configure the Rx unit of the MAC after a reset. 3771 **/ 3772 static void igb_configure_rx(struct igb_adapter *adapter) 3773 { 3774 int i; 3775 3776 /* set the correct pool for the PF default MAC address in entry 0 */ 3777 igb_rar_set_qsel(adapter, adapter->hw.mac.addr, 0, 3778 adapter->vfs_allocated_count); 3779 3780 /* Setup the HW Rx Head and Tail Descriptor Pointers and 3781 * the Base and Length of the Rx Descriptor Ring 3782 */ 3783 for (i = 0; i < adapter->num_rx_queues; i++) 3784 igb_configure_rx_ring(adapter, adapter->rx_ring[i]); 3785 } 3786 3787 /** 3788 * igb_free_tx_resources - Free Tx Resources per Queue 3789 * @tx_ring: Tx descriptor ring for a specific queue 3790 * 3791 * Free all transmit software resources 3792 **/ 3793 void igb_free_tx_resources(struct igb_ring *tx_ring) 3794 { 3795 igb_clean_tx_ring(tx_ring); 3796 3797 vfree(tx_ring->tx_buffer_info); 3798 tx_ring->tx_buffer_info = NULL; 3799 3800 /* if not set, then don't free */ 3801 if (!tx_ring->desc) 3802 return; 3803 3804 dma_free_coherent(tx_ring->dev, tx_ring->size, 3805 tx_ring->desc, tx_ring->dma); 3806 3807 tx_ring->desc = NULL; 3808 } 3809 3810 /** 3811 * igb_free_all_tx_resources - Free Tx Resources for All Queues 3812 * @adapter: board private structure 3813 * 3814 * Free all transmit software resources 3815 **/ 3816 static void igb_free_all_tx_resources(struct igb_adapter *adapter) 3817 { 3818 int i; 3819 3820 for (i = 0; i < adapter->num_tx_queues; i++) 3821 if (adapter->tx_ring[i]) 3822 igb_free_tx_resources(adapter->tx_ring[i]); 3823 } 3824 3825 void igb_unmap_and_free_tx_resource(struct igb_ring *ring, 3826 struct igb_tx_buffer *tx_buffer) 3827 { 3828 if (tx_buffer->skb) { 3829 dev_kfree_skb_any(tx_buffer->skb); 3830 if (dma_unmap_len(tx_buffer, len)) 3831 dma_unmap_single(ring->dev, 3832 dma_unmap_addr(tx_buffer, dma), 3833 dma_unmap_len(tx_buffer, len), 3834 DMA_TO_DEVICE); 3835 } else if (dma_unmap_len(tx_buffer, len)) { 3836 dma_unmap_page(ring->dev, 3837 dma_unmap_addr(tx_buffer, dma), 3838 dma_unmap_len(tx_buffer, len), 3839 DMA_TO_DEVICE); 3840 } 3841 tx_buffer->next_to_watch = NULL; 3842 tx_buffer->skb = NULL; 3843 dma_unmap_len_set(tx_buffer, len, 0); 3844 /* buffer_info must be completely set up in the transmit path */ 3845 } 3846 3847 /** 3848 * igb_clean_tx_ring - Free Tx Buffers 3849 * @tx_ring: ring to be cleaned 3850 **/ 3851 static void igb_clean_tx_ring(struct igb_ring *tx_ring) 3852 { 3853 struct igb_tx_buffer *buffer_info; 3854 unsigned long size; 3855 u16 i; 3856 3857 if (!tx_ring->tx_buffer_info) 3858 return; 3859 /* Free all the Tx ring sk_buffs */ 3860 3861 for (i = 0; i < tx_ring->count; i++) { 3862 buffer_info = &tx_ring->tx_buffer_info[i]; 3863 igb_unmap_and_free_tx_resource(tx_ring, buffer_info); 3864 } 3865 3866 netdev_tx_reset_queue(txring_txq(tx_ring)); 3867 3868 size = sizeof(struct igb_tx_buffer) * tx_ring->count; 3869 memset(tx_ring->tx_buffer_info, 0, size); 3870 3871 /* Zero out the descriptor ring */ 3872 memset(tx_ring->desc, 0, tx_ring->size); 3873 3874 tx_ring->next_to_use = 0; 3875 tx_ring->next_to_clean = 0; 3876 } 3877 3878 /** 3879 * igb_clean_all_tx_rings - Free Tx Buffers for all queues 3880 * @adapter: board private structure 3881 **/ 3882 static void igb_clean_all_tx_rings(struct igb_adapter *adapter) 3883 { 3884 int i; 3885 3886 for (i = 0; i < adapter->num_tx_queues; i++) 3887 if (adapter->tx_ring[i]) 3888 igb_clean_tx_ring(adapter->tx_ring[i]); 3889 } 3890 3891 /** 3892 * igb_free_rx_resources - Free Rx Resources 3893 * @rx_ring: ring to clean the resources from 3894 * 3895 * Free all receive software resources 3896 **/ 3897 void igb_free_rx_resources(struct igb_ring *rx_ring) 3898 { 3899 igb_clean_rx_ring(rx_ring); 3900 3901 vfree(rx_ring->rx_buffer_info); 3902 rx_ring->rx_buffer_info = NULL; 3903 3904 /* if not set, then don't free */ 3905 if (!rx_ring->desc) 3906 return; 3907 3908 dma_free_coherent(rx_ring->dev, rx_ring->size, 3909 rx_ring->desc, rx_ring->dma); 3910 3911 rx_ring->desc = NULL; 3912 } 3913 3914 /** 3915 * igb_free_all_rx_resources - Free Rx Resources for All Queues 3916 * @adapter: board private structure 3917 * 3918 * Free all receive software resources 3919 **/ 3920 static void igb_free_all_rx_resources(struct igb_adapter *adapter) 3921 { 3922 int i; 3923 3924 for (i = 0; i < adapter->num_rx_queues; i++) 3925 if (adapter->rx_ring[i]) 3926 igb_free_rx_resources(adapter->rx_ring[i]); 3927 } 3928 3929 /** 3930 * igb_clean_rx_ring - Free Rx Buffers per Queue 3931 * @rx_ring: ring to free buffers from 3932 **/ 3933 static void igb_clean_rx_ring(struct igb_ring *rx_ring) 3934 { 3935 unsigned long size; 3936 u16 i; 3937 3938 if (rx_ring->skb) 3939 dev_kfree_skb(rx_ring->skb); 3940 rx_ring->skb = NULL; 3941 3942 if (!rx_ring->rx_buffer_info) 3943 return; 3944 3945 /* Free all the Rx ring sk_buffs */ 3946 for (i = 0; i < rx_ring->count; i++) { 3947 struct igb_rx_buffer *buffer_info = &rx_ring->rx_buffer_info[i]; 3948 3949 if (!buffer_info->page) 3950 continue; 3951 3952 /* Invalidate cache lines that may have been written to by 3953 * device so that we avoid corrupting memory. 3954 */ 3955 dma_sync_single_range_for_cpu(rx_ring->dev, 3956 buffer_info->dma, 3957 buffer_info->page_offset, 3958 IGB_RX_BUFSZ, 3959 DMA_FROM_DEVICE); 3960 3961 /* free resources associated with mapping */ 3962 dma_unmap_page_attrs(rx_ring->dev, 3963 buffer_info->dma, 3964 PAGE_SIZE, 3965 DMA_FROM_DEVICE, 3966 DMA_ATTR_SKIP_CPU_SYNC); 3967 __page_frag_cache_drain(buffer_info->page, 3968 buffer_info->pagecnt_bias); 3969 3970 buffer_info->page = NULL; 3971 } 3972 3973 size = sizeof(struct igb_rx_buffer) * rx_ring->count; 3974 memset(rx_ring->rx_buffer_info, 0, size); 3975 3976 /* Zero out the descriptor ring */ 3977 memset(rx_ring->desc, 0, rx_ring->size); 3978 3979 rx_ring->next_to_alloc = 0; 3980 rx_ring->next_to_clean = 0; 3981 rx_ring->next_to_use = 0; 3982 } 3983 3984 /** 3985 * igb_clean_all_rx_rings - Free Rx Buffers for all queues 3986 * @adapter: board private structure 3987 **/ 3988 static void igb_clean_all_rx_rings(struct igb_adapter *adapter) 3989 { 3990 int i; 3991 3992 for (i = 0; i < adapter->num_rx_queues; i++) 3993 if (adapter->rx_ring[i]) 3994 igb_clean_rx_ring(adapter->rx_ring[i]); 3995 } 3996 3997 /** 3998 * igb_set_mac - Change the Ethernet Address of the NIC 3999 * @netdev: network interface device structure 4000 * @p: pointer to an address structure 4001 * 4002 * Returns 0 on success, negative on failure 4003 **/ 4004 static int igb_set_mac(struct net_device *netdev, void *p) 4005 { 4006 struct igb_adapter *adapter = netdev_priv(netdev); 4007 struct e1000_hw *hw = &adapter->hw; 4008 struct sockaddr *addr = p; 4009 4010 if (!is_valid_ether_addr(addr->sa_data)) 4011 return -EADDRNOTAVAIL; 4012 4013 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len); 4014 memcpy(hw->mac.addr, addr->sa_data, netdev->addr_len); 4015 4016 /* set the correct pool for the new PF MAC address in entry 0 */ 4017 igb_rar_set_qsel(adapter, hw->mac.addr, 0, 4018 adapter->vfs_allocated_count); 4019 4020 return 0; 4021 } 4022 4023 /** 4024 * igb_write_mc_addr_list - write multicast addresses to MTA 4025 * @netdev: network interface device structure 4026 * 4027 * Writes multicast address list to the MTA hash table. 4028 * Returns: -ENOMEM on failure 4029 * 0 on no addresses written 4030 * X on writing X addresses to MTA 4031 **/ 4032 static int igb_write_mc_addr_list(struct net_device *netdev) 4033 { 4034 struct igb_adapter *adapter = netdev_priv(netdev); 4035 struct e1000_hw *hw = &adapter->hw; 4036 struct netdev_hw_addr *ha; 4037 u8 *mta_list; 4038 int i; 4039 4040 if (netdev_mc_empty(netdev)) { 4041 /* nothing to program, so clear mc list */ 4042 igb_update_mc_addr_list(hw, NULL, 0); 4043 igb_restore_vf_multicasts(adapter); 4044 return 0; 4045 } 4046 4047 mta_list = kzalloc(netdev_mc_count(netdev) * 6, GFP_ATOMIC); 4048 if (!mta_list) 4049 return -ENOMEM; 4050 4051 /* The shared function expects a packed array of only addresses. */ 4052 i = 0; 4053 netdev_for_each_mc_addr(ha, netdev) 4054 memcpy(mta_list + (i++ * ETH_ALEN), ha->addr, ETH_ALEN); 4055 4056 igb_update_mc_addr_list(hw, mta_list, i); 4057 kfree(mta_list); 4058 4059 return netdev_mc_count(netdev); 4060 } 4061 4062 /** 4063 * igb_write_uc_addr_list - write unicast addresses to RAR table 4064 * @netdev: network interface device structure 4065 * 4066 * Writes unicast address list to the RAR table. 4067 * Returns: -ENOMEM on failure/insufficient address space 4068 * 0 on no addresses written 4069 * X on writing X addresses to the RAR table 4070 **/ 4071 static int igb_write_uc_addr_list(struct net_device *netdev) 4072 { 4073 struct igb_adapter *adapter = netdev_priv(netdev); 4074 struct e1000_hw *hw = &adapter->hw; 4075 unsigned int vfn = adapter->vfs_allocated_count; 4076 unsigned int rar_entries = hw->mac.rar_entry_count - (vfn + 1); 4077 int count = 0; 4078 4079 /* return ENOMEM indicating insufficient memory for addresses */ 4080 if (netdev_uc_count(netdev) > rar_entries) 4081 return -ENOMEM; 4082 4083 if (!netdev_uc_empty(netdev) && rar_entries) { 4084 struct netdev_hw_addr *ha; 4085 4086 netdev_for_each_uc_addr(ha, netdev) { 4087 if (!rar_entries) 4088 break; 4089 igb_rar_set_qsel(adapter, ha->addr, 4090 rar_entries--, 4091 vfn); 4092 count++; 4093 } 4094 } 4095 /* write the addresses in reverse order to avoid write combining */ 4096 for (; rar_entries > 0 ; rar_entries--) { 4097 wr32(E1000_RAH(rar_entries), 0); 4098 wr32(E1000_RAL(rar_entries), 0); 4099 } 4100 wrfl(); 4101 4102 return count; 4103 } 4104 4105 static int igb_vlan_promisc_enable(struct igb_adapter *adapter) 4106 { 4107 struct e1000_hw *hw = &adapter->hw; 4108 u32 i, pf_id; 4109 4110 switch (hw->mac.type) { 4111 case e1000_i210: 4112 case e1000_i211: 4113 case e1000_i350: 4114 /* VLAN filtering needed for VLAN prio filter */ 4115 if (adapter->netdev->features & NETIF_F_NTUPLE) 4116 break; 4117 /* fall through */ 4118 case e1000_82576: 4119 case e1000_82580: 4120 case e1000_i354: 4121 /* VLAN filtering needed for pool filtering */ 4122 if (adapter->vfs_allocated_count) 4123 break; 4124 /* fall through */ 4125 default: 4126 return 1; 4127 } 4128 4129 /* We are already in VLAN promisc, nothing to do */ 4130 if (adapter->flags & IGB_FLAG_VLAN_PROMISC) 4131 return 0; 4132 4133 if (!adapter->vfs_allocated_count) 4134 goto set_vfta; 4135 4136 /* Add PF to all active pools */ 4137 pf_id = adapter->vfs_allocated_count + E1000_VLVF_POOLSEL_SHIFT; 4138 4139 for (i = E1000_VLVF_ARRAY_SIZE; --i;) { 4140 u32 vlvf = rd32(E1000_VLVF(i)); 4141 4142 vlvf |= BIT(pf_id); 4143 wr32(E1000_VLVF(i), vlvf); 4144 } 4145 4146 set_vfta: 4147 /* Set all bits in the VLAN filter table array */ 4148 for (i = E1000_VLAN_FILTER_TBL_SIZE; i--;) 4149 hw->mac.ops.write_vfta(hw, i, ~0U); 4150 4151 /* Set flag so we don't redo unnecessary work */ 4152 adapter->flags |= IGB_FLAG_VLAN_PROMISC; 4153 4154 return 0; 4155 } 4156 4157 #define VFTA_BLOCK_SIZE 8 4158 static void igb_scrub_vfta(struct igb_adapter *adapter, u32 vfta_offset) 4159 { 4160 struct e1000_hw *hw = &adapter->hw; 4161 u32 vfta[VFTA_BLOCK_SIZE] = { 0 }; 4162 u32 vid_start = vfta_offset * 32; 4163 u32 vid_end = vid_start + (VFTA_BLOCK_SIZE * 32); 4164 u32 i, vid, word, bits, pf_id; 4165 4166 /* guarantee that we don't scrub out management VLAN */ 4167 vid = adapter->mng_vlan_id; 4168 if (vid >= vid_start && vid < vid_end) 4169 vfta[(vid - vid_start) / 32] |= BIT(vid % 32); 4170 4171 if (!adapter->vfs_allocated_count) 4172 goto set_vfta; 4173 4174 pf_id = adapter->vfs_allocated_count + E1000_VLVF_POOLSEL_SHIFT; 4175 4176 for (i = E1000_VLVF_ARRAY_SIZE; --i;) { 4177 u32 vlvf = rd32(E1000_VLVF(i)); 4178 4179 /* pull VLAN ID from VLVF */ 4180 vid = vlvf & VLAN_VID_MASK; 4181 4182 /* only concern ourselves with a certain range */ 4183 if (vid < vid_start || vid >= vid_end) 4184 continue; 4185 4186 if (vlvf & E1000_VLVF_VLANID_ENABLE) { 4187 /* record VLAN ID in VFTA */ 4188 vfta[(vid - vid_start) / 32] |= BIT(vid % 32); 4189 4190 /* if PF is part of this then continue */ 4191 if (test_bit(vid, adapter->active_vlans)) 4192 continue; 4193 } 4194 4195 /* remove PF from the pool */ 4196 bits = ~BIT(pf_id); 4197 bits &= rd32(E1000_VLVF(i)); 4198 wr32(E1000_VLVF(i), bits); 4199 } 4200 4201 set_vfta: 4202 /* extract values from active_vlans and write back to VFTA */ 4203 for (i = VFTA_BLOCK_SIZE; i--;) { 4204 vid = (vfta_offset + i) * 32; 4205 word = vid / BITS_PER_LONG; 4206 bits = vid % BITS_PER_LONG; 4207 4208 vfta[i] |= adapter->active_vlans[word] >> bits; 4209 4210 hw->mac.ops.write_vfta(hw, vfta_offset + i, vfta[i]); 4211 } 4212 } 4213 4214 static void igb_vlan_promisc_disable(struct igb_adapter *adapter) 4215 { 4216 u32 i; 4217 4218 /* We are not in VLAN promisc, nothing to do */ 4219 if (!(adapter->flags & IGB_FLAG_VLAN_PROMISC)) 4220 return; 4221 4222 /* Set flag so we don't redo unnecessary work */ 4223 adapter->flags &= ~IGB_FLAG_VLAN_PROMISC; 4224 4225 for (i = 0; i < E1000_VLAN_FILTER_TBL_SIZE; i += VFTA_BLOCK_SIZE) 4226 igb_scrub_vfta(adapter, i); 4227 } 4228 4229 /** 4230 * igb_set_rx_mode - Secondary Unicast, Multicast and Promiscuous mode set 4231 * @netdev: network interface device structure 4232 * 4233 * The set_rx_mode entry point is called whenever the unicast or multicast 4234 * address lists or the network interface flags are updated. This routine is 4235 * responsible for configuring the hardware for proper unicast, multicast, 4236 * promiscuous mode, and all-multi behavior. 4237 **/ 4238 static void igb_set_rx_mode(struct net_device *netdev) 4239 { 4240 struct igb_adapter *adapter = netdev_priv(netdev); 4241 struct e1000_hw *hw = &adapter->hw; 4242 unsigned int vfn = adapter->vfs_allocated_count; 4243 u32 rctl = 0, vmolr = 0; 4244 int count; 4245 4246 /* Check for Promiscuous and All Multicast modes */ 4247 if (netdev->flags & IFF_PROMISC) { 4248 rctl |= E1000_RCTL_UPE | E1000_RCTL_MPE; 4249 vmolr |= E1000_VMOLR_MPME; 4250 4251 /* enable use of UTA filter to force packets to default pool */ 4252 if (hw->mac.type == e1000_82576) 4253 vmolr |= E1000_VMOLR_ROPE; 4254 } else { 4255 if (netdev->flags & IFF_ALLMULTI) { 4256 rctl |= E1000_RCTL_MPE; 4257 vmolr |= E1000_VMOLR_MPME; 4258 } else { 4259 /* Write addresses to the MTA, if the attempt fails 4260 * then we should just turn on promiscuous mode so 4261 * that we can at least receive multicast traffic 4262 */ 4263 count = igb_write_mc_addr_list(netdev); 4264 if (count < 0) { 4265 rctl |= E1000_RCTL_MPE; 4266 vmolr |= E1000_VMOLR_MPME; 4267 } else if (count) { 4268 vmolr |= E1000_VMOLR_ROMPE; 4269 } 4270 } 4271 } 4272 4273 /* Write addresses to available RAR registers, if there is not 4274 * sufficient space to store all the addresses then enable 4275 * unicast promiscuous mode 4276 */ 4277 count = igb_write_uc_addr_list(netdev); 4278 if (count < 0) { 4279 rctl |= E1000_RCTL_UPE; 4280 vmolr |= E1000_VMOLR_ROPE; 4281 } 4282 4283 /* enable VLAN filtering by default */ 4284 rctl |= E1000_RCTL_VFE; 4285 4286 /* disable VLAN filtering for modes that require it */ 4287 if ((netdev->flags & IFF_PROMISC) || 4288 (netdev->features & NETIF_F_RXALL)) { 4289 /* if we fail to set all rules then just clear VFE */ 4290 if (igb_vlan_promisc_enable(adapter)) 4291 rctl &= ~E1000_RCTL_VFE; 4292 } else { 4293 igb_vlan_promisc_disable(adapter); 4294 } 4295 4296 /* update state of unicast, multicast, and VLAN filtering modes */ 4297 rctl |= rd32(E1000_RCTL) & ~(E1000_RCTL_UPE | E1000_RCTL_MPE | 4298 E1000_RCTL_VFE); 4299 wr32(E1000_RCTL, rctl); 4300 4301 /* In order to support SR-IOV and eventually VMDq it is necessary to set 4302 * the VMOLR to enable the appropriate modes. Without this workaround 4303 * we will have issues with VLAN tag stripping not being done for frames 4304 * that are only arriving because we are the default pool 4305 */ 4306 if ((hw->mac.type < e1000_82576) || (hw->mac.type > e1000_i350)) 4307 return; 4308 4309 /* set UTA to appropriate mode */ 4310 igb_set_uta(adapter, !!(vmolr & E1000_VMOLR_ROPE)); 4311 4312 vmolr |= rd32(E1000_VMOLR(vfn)) & 4313 ~(E1000_VMOLR_ROPE | E1000_VMOLR_MPME | E1000_VMOLR_ROMPE); 4314 4315 /* enable Rx jumbo frames, no need for restriction */ 4316 vmolr &= ~E1000_VMOLR_RLPML_MASK; 4317 vmolr |= MAX_JUMBO_FRAME_SIZE | E1000_VMOLR_LPE; 4318 4319 wr32(E1000_VMOLR(vfn), vmolr); 4320 wr32(E1000_RLPML, MAX_JUMBO_FRAME_SIZE); 4321 4322 igb_restore_vf_multicasts(adapter); 4323 } 4324 4325 static void igb_check_wvbr(struct igb_adapter *adapter) 4326 { 4327 struct e1000_hw *hw = &adapter->hw; 4328 u32 wvbr = 0; 4329 4330 switch (hw->mac.type) { 4331 case e1000_82576: 4332 case e1000_i350: 4333 wvbr = rd32(E1000_WVBR); 4334 if (!wvbr) 4335 return; 4336 break; 4337 default: 4338 break; 4339 } 4340 4341 adapter->wvbr |= wvbr; 4342 } 4343 4344 #define IGB_STAGGERED_QUEUE_OFFSET 8 4345 4346 static void igb_spoof_check(struct igb_adapter *adapter) 4347 { 4348 int j; 4349 4350 if (!adapter->wvbr) 4351 return; 4352 4353 for (j = 0; j < adapter->vfs_allocated_count; j++) { 4354 if (adapter->wvbr & BIT(j) || 4355 adapter->wvbr & BIT(j + IGB_STAGGERED_QUEUE_OFFSET)) { 4356 dev_warn(&adapter->pdev->dev, 4357 "Spoof event(s) detected on VF %d\n", j); 4358 adapter->wvbr &= 4359 ~(BIT(j) | 4360 BIT(j + IGB_STAGGERED_QUEUE_OFFSET)); 4361 } 4362 } 4363 } 4364 4365 /* Need to wait a few seconds after link up to get diagnostic information from 4366 * the phy 4367 */ 4368 static void igb_update_phy_info(unsigned long data) 4369 { 4370 struct igb_adapter *adapter = (struct igb_adapter *) data; 4371 igb_get_phy_info(&adapter->hw); 4372 } 4373 4374 /** 4375 * igb_has_link - check shared code for link and determine up/down 4376 * @adapter: pointer to driver private info 4377 **/ 4378 bool igb_has_link(struct igb_adapter *adapter) 4379 { 4380 struct e1000_hw *hw = &adapter->hw; 4381 bool link_active = false; 4382 4383 /* get_link_status is set on LSC (link status) interrupt or 4384 * rx sequence error interrupt. get_link_status will stay 4385 * false until the e1000_check_for_link establishes link 4386 * for copper adapters ONLY 4387 */ 4388 switch (hw->phy.media_type) { 4389 case e1000_media_type_copper: 4390 if (!hw->mac.get_link_status) 4391 return true; 4392 case e1000_media_type_internal_serdes: 4393 hw->mac.ops.check_for_link(hw); 4394 link_active = !hw->mac.get_link_status; 4395 break; 4396 default: 4397 case e1000_media_type_unknown: 4398 break; 4399 } 4400 4401 if (((hw->mac.type == e1000_i210) || 4402 (hw->mac.type == e1000_i211)) && 4403 (hw->phy.id == I210_I_PHY_ID)) { 4404 if (!netif_carrier_ok(adapter->netdev)) { 4405 adapter->flags &= ~IGB_FLAG_NEED_LINK_UPDATE; 4406 } else if (!(adapter->flags & IGB_FLAG_NEED_LINK_UPDATE)) { 4407 adapter->flags |= IGB_FLAG_NEED_LINK_UPDATE; 4408 adapter->link_check_timeout = jiffies; 4409 } 4410 } 4411 4412 return link_active; 4413 } 4414 4415 static bool igb_thermal_sensor_event(struct e1000_hw *hw, u32 event) 4416 { 4417 bool ret = false; 4418 u32 ctrl_ext, thstat; 4419 4420 /* check for thermal sensor event on i350 copper only */ 4421 if (hw->mac.type == e1000_i350) { 4422 thstat = rd32(E1000_THSTAT); 4423 ctrl_ext = rd32(E1000_CTRL_EXT); 4424 4425 if ((hw->phy.media_type == e1000_media_type_copper) && 4426 !(ctrl_ext & E1000_CTRL_EXT_LINK_MODE_SGMII)) 4427 ret = !!(thstat & event); 4428 } 4429 4430 return ret; 4431 } 4432 4433 /** 4434 * igb_check_lvmmc - check for malformed packets received 4435 * and indicated in LVMMC register 4436 * @adapter: pointer to adapter 4437 **/ 4438 static void igb_check_lvmmc(struct igb_adapter *adapter) 4439 { 4440 struct e1000_hw *hw = &adapter->hw; 4441 u32 lvmmc; 4442 4443 lvmmc = rd32(E1000_LVMMC); 4444 if (lvmmc) { 4445 if (unlikely(net_ratelimit())) { 4446 netdev_warn(adapter->netdev, 4447 "malformed Tx packet detected and dropped, LVMMC:0x%08x\n", 4448 lvmmc); 4449 } 4450 } 4451 } 4452 4453 /** 4454 * igb_watchdog - Timer Call-back 4455 * @data: pointer to adapter cast into an unsigned long 4456 **/ 4457 static void igb_watchdog(unsigned long data) 4458 { 4459 struct igb_adapter *adapter = (struct igb_adapter *)data; 4460 /* Do the rest outside of interrupt context */ 4461 schedule_work(&adapter->watchdog_task); 4462 } 4463 4464 static void igb_watchdog_task(struct work_struct *work) 4465 { 4466 struct igb_adapter *adapter = container_of(work, 4467 struct igb_adapter, 4468 watchdog_task); 4469 struct e1000_hw *hw = &adapter->hw; 4470 struct e1000_phy_info *phy = &hw->phy; 4471 struct net_device *netdev = adapter->netdev; 4472 u32 link; 4473 int i; 4474 u32 connsw; 4475 u16 phy_data, retry_count = 20; 4476 4477 link = igb_has_link(adapter); 4478 4479 if (adapter->flags & IGB_FLAG_NEED_LINK_UPDATE) { 4480 if (time_after(jiffies, (adapter->link_check_timeout + HZ))) 4481 adapter->flags &= ~IGB_FLAG_NEED_LINK_UPDATE; 4482 else 4483 link = false; 4484 } 4485 4486 /* Force link down if we have fiber to swap to */ 4487 if (adapter->flags & IGB_FLAG_MAS_ENABLE) { 4488 if (hw->phy.media_type == e1000_media_type_copper) { 4489 connsw = rd32(E1000_CONNSW); 4490 if (!(connsw & E1000_CONNSW_AUTOSENSE_EN)) 4491 link = 0; 4492 } 4493 } 4494 if (link) { 4495 /* Perform a reset if the media type changed. */ 4496 if (hw->dev_spec._82575.media_changed) { 4497 hw->dev_spec._82575.media_changed = false; 4498 adapter->flags |= IGB_FLAG_MEDIA_RESET; 4499 igb_reset(adapter); 4500 } 4501 /* Cancel scheduled suspend requests. */ 4502 pm_runtime_resume(netdev->dev.parent); 4503 4504 if (!netif_carrier_ok(netdev)) { 4505 u32 ctrl; 4506 4507 hw->mac.ops.get_speed_and_duplex(hw, 4508 &adapter->link_speed, 4509 &adapter->link_duplex); 4510 4511 ctrl = rd32(E1000_CTRL); 4512 /* Links status message must follow this format */ 4513 netdev_info(netdev, 4514 "igb: %s NIC Link is Up %d Mbps %s Duplex, Flow Control: %s\n", 4515 netdev->name, 4516 adapter->link_speed, 4517 adapter->link_duplex == FULL_DUPLEX ? 4518 "Full" : "Half", 4519 (ctrl & E1000_CTRL_TFCE) && 4520 (ctrl & E1000_CTRL_RFCE) ? "RX/TX" : 4521 (ctrl & E1000_CTRL_RFCE) ? "RX" : 4522 (ctrl & E1000_CTRL_TFCE) ? "TX" : "None"); 4523 4524 /* disable EEE if enabled */ 4525 if ((adapter->flags & IGB_FLAG_EEE) && 4526 (adapter->link_duplex == HALF_DUPLEX)) { 4527 dev_info(&adapter->pdev->dev, 4528 "EEE Disabled: unsupported at half duplex. Re-enable using ethtool when at full duplex.\n"); 4529 adapter->hw.dev_spec._82575.eee_disable = true; 4530 adapter->flags &= ~IGB_FLAG_EEE; 4531 } 4532 4533 /* check if SmartSpeed worked */ 4534 igb_check_downshift(hw); 4535 if (phy->speed_downgraded) 4536 netdev_warn(netdev, "Link Speed was downgraded by SmartSpeed\n"); 4537 4538 /* check for thermal sensor event */ 4539 if (igb_thermal_sensor_event(hw, 4540 E1000_THSTAT_LINK_THROTTLE)) 4541 netdev_info(netdev, "The network adapter link speed was downshifted because it overheated\n"); 4542 4543 /* adjust timeout factor according to speed/duplex */ 4544 adapter->tx_timeout_factor = 1; 4545 switch (adapter->link_speed) { 4546 case SPEED_10: 4547 adapter->tx_timeout_factor = 14; 4548 break; 4549 case SPEED_100: 4550 /* maybe add some timeout factor ? */ 4551 break; 4552 } 4553 4554 if (adapter->link_speed != SPEED_1000) 4555 goto no_wait; 4556 4557 /* wait for Remote receiver status OK */ 4558 retry_read_status: 4559 if (!igb_read_phy_reg(hw, PHY_1000T_STATUS, 4560 &phy_data)) { 4561 if (!(phy_data & SR_1000T_REMOTE_RX_STATUS) && 4562 retry_count) { 4563 msleep(100); 4564 retry_count--; 4565 goto retry_read_status; 4566 } else if (!retry_count) { 4567 dev_err(&adapter->pdev->dev, "exceed max 2 second\n"); 4568 } 4569 } else { 4570 dev_err(&adapter->pdev->dev, "read 1000Base-T Status Reg\n"); 4571 } 4572 no_wait: 4573 netif_carrier_on(netdev); 4574 4575 igb_ping_all_vfs(adapter); 4576 igb_check_vf_rate_limit(adapter); 4577 4578 /* link state has changed, schedule phy info update */ 4579 if (!test_bit(__IGB_DOWN, &adapter->state)) 4580 mod_timer(&adapter->phy_info_timer, 4581 round_jiffies(jiffies + 2 * HZ)); 4582 } 4583 } else { 4584 if (netif_carrier_ok(netdev)) { 4585 adapter->link_speed = 0; 4586 adapter->link_duplex = 0; 4587 4588 /* check for thermal sensor event */ 4589 if (igb_thermal_sensor_event(hw, 4590 E1000_THSTAT_PWR_DOWN)) { 4591 netdev_err(netdev, "The network adapter was stopped because it overheated\n"); 4592 } 4593 4594 /* Links status message must follow this format */ 4595 netdev_info(netdev, "igb: %s NIC Link is Down\n", 4596 netdev->name); 4597 netif_carrier_off(netdev); 4598 4599 igb_ping_all_vfs(adapter); 4600 4601 /* link state has changed, schedule phy info update */ 4602 if (!test_bit(__IGB_DOWN, &adapter->state)) 4603 mod_timer(&adapter->phy_info_timer, 4604 round_jiffies(jiffies + 2 * HZ)); 4605 4606 /* link is down, time to check for alternate media */ 4607 if (adapter->flags & IGB_FLAG_MAS_ENABLE) { 4608 igb_check_swap_media(adapter); 4609 if (adapter->flags & IGB_FLAG_MEDIA_RESET) { 4610 schedule_work(&adapter->reset_task); 4611 /* return immediately */ 4612 return; 4613 } 4614 } 4615 pm_schedule_suspend(netdev->dev.parent, 4616 MSEC_PER_SEC * 5); 4617 4618 /* also check for alternate media here */ 4619 } else if (!netif_carrier_ok(netdev) && 4620 (adapter->flags & IGB_FLAG_MAS_ENABLE)) { 4621 igb_check_swap_media(adapter); 4622 if (adapter->flags & IGB_FLAG_MEDIA_RESET) { 4623 schedule_work(&adapter->reset_task); 4624 /* return immediately */ 4625 return; 4626 } 4627 } 4628 } 4629 4630 spin_lock(&adapter->stats64_lock); 4631 igb_update_stats(adapter, &adapter->stats64); 4632 spin_unlock(&adapter->stats64_lock); 4633 4634 for (i = 0; i < adapter->num_tx_queues; i++) { 4635 struct igb_ring *tx_ring = adapter->tx_ring[i]; 4636 if (!netif_carrier_ok(netdev)) { 4637 /* We've lost link, so the controller stops DMA, 4638 * but we've got queued Tx work that's never going 4639 * to get done, so reset controller to flush Tx. 4640 * (Do the reset outside of interrupt context). 4641 */ 4642 if (igb_desc_unused(tx_ring) + 1 < tx_ring->count) { 4643 adapter->tx_timeout_count++; 4644 schedule_work(&adapter->reset_task); 4645 /* return immediately since reset is imminent */ 4646 return; 4647 } 4648 } 4649 4650 /* Force detection of hung controller every watchdog period */ 4651 set_bit(IGB_RING_FLAG_TX_DETECT_HANG, &tx_ring->flags); 4652 } 4653 4654 /* Cause software interrupt to ensure Rx ring is cleaned */ 4655 if (adapter->flags & IGB_FLAG_HAS_MSIX) { 4656 u32 eics = 0; 4657 4658 for (i = 0; i < adapter->num_q_vectors; i++) 4659 eics |= adapter->q_vector[i]->eims_value; 4660 wr32(E1000_EICS, eics); 4661 } else { 4662 wr32(E1000_ICS, E1000_ICS_RXDMT0); 4663 } 4664 4665 igb_spoof_check(adapter); 4666 igb_ptp_rx_hang(adapter); 4667 4668 /* Check LVMMC register on i350/i354 only */ 4669 if ((adapter->hw.mac.type == e1000_i350) || 4670 (adapter->hw.mac.type == e1000_i354)) 4671 igb_check_lvmmc(adapter); 4672 4673 /* Reset the timer */ 4674 if (!test_bit(__IGB_DOWN, &adapter->state)) { 4675 if (adapter->flags & IGB_FLAG_NEED_LINK_UPDATE) 4676 mod_timer(&adapter->watchdog_timer, 4677 round_jiffies(jiffies + HZ)); 4678 else 4679 mod_timer(&adapter->watchdog_timer, 4680 round_jiffies(jiffies + 2 * HZ)); 4681 } 4682 } 4683 4684 enum latency_range { 4685 lowest_latency = 0, 4686 low_latency = 1, 4687 bulk_latency = 2, 4688 latency_invalid = 255 4689 }; 4690 4691 /** 4692 * igb_update_ring_itr - update the dynamic ITR value based on packet size 4693 * @q_vector: pointer to q_vector 4694 * 4695 * Stores a new ITR value based on strictly on packet size. This 4696 * algorithm is less sophisticated than that used in igb_update_itr, 4697 * due to the difficulty of synchronizing statistics across multiple 4698 * receive rings. The divisors and thresholds used by this function 4699 * were determined based on theoretical maximum wire speed and testing 4700 * data, in order to minimize response time while increasing bulk 4701 * throughput. 4702 * This functionality is controlled by ethtool's coalescing settings. 4703 * NOTE: This function is called only when operating in a multiqueue 4704 * receive environment. 4705 **/ 4706 static void igb_update_ring_itr(struct igb_q_vector *q_vector) 4707 { 4708 int new_val = q_vector->itr_val; 4709 int avg_wire_size = 0; 4710 struct igb_adapter *adapter = q_vector->adapter; 4711 unsigned int packets; 4712 4713 /* For non-gigabit speeds, just fix the interrupt rate at 4000 4714 * ints/sec - ITR timer value of 120 ticks. 4715 */ 4716 if (adapter->link_speed != SPEED_1000) { 4717 new_val = IGB_4K_ITR; 4718 goto set_itr_val; 4719 } 4720 4721 packets = q_vector->rx.total_packets; 4722 if (packets) 4723 avg_wire_size = q_vector->rx.total_bytes / packets; 4724 4725 packets = q_vector->tx.total_packets; 4726 if (packets) 4727 avg_wire_size = max_t(u32, avg_wire_size, 4728 q_vector->tx.total_bytes / packets); 4729 4730 /* if avg_wire_size isn't set no work was done */ 4731 if (!avg_wire_size) 4732 goto clear_counts; 4733 4734 /* Add 24 bytes to size to account for CRC, preamble, and gap */ 4735 avg_wire_size += 24; 4736 4737 /* Don't starve jumbo frames */ 4738 avg_wire_size = min(avg_wire_size, 3000); 4739 4740 /* Give a little boost to mid-size frames */ 4741 if ((avg_wire_size > 300) && (avg_wire_size < 1200)) 4742 new_val = avg_wire_size / 3; 4743 else 4744 new_val = avg_wire_size / 2; 4745 4746 /* conservative mode (itr 3) eliminates the lowest_latency setting */ 4747 if (new_val < IGB_20K_ITR && 4748 ((q_vector->rx.ring && adapter->rx_itr_setting == 3) || 4749 (!q_vector->rx.ring && adapter->tx_itr_setting == 3))) 4750 new_val = IGB_20K_ITR; 4751 4752 set_itr_val: 4753 if (new_val != q_vector->itr_val) { 4754 q_vector->itr_val = new_val; 4755 q_vector->set_itr = 1; 4756 } 4757 clear_counts: 4758 q_vector->rx.total_bytes = 0; 4759 q_vector->rx.total_packets = 0; 4760 q_vector->tx.total_bytes = 0; 4761 q_vector->tx.total_packets = 0; 4762 } 4763 4764 /** 4765 * igb_update_itr - update the dynamic ITR value based on statistics 4766 * @q_vector: pointer to q_vector 4767 * @ring_container: ring info to update the itr for 4768 * 4769 * Stores a new ITR value based on packets and byte 4770 * counts during the last interrupt. The advantage of per interrupt 4771 * computation is faster updates and more accurate ITR for the current 4772 * traffic pattern. Constants in this function were computed 4773 * based on theoretical maximum wire speed and thresholds were set based 4774 * on testing data as well as attempting to minimize response time 4775 * while increasing bulk throughput. 4776 * This functionality is controlled by ethtool's coalescing settings. 4777 * NOTE: These calculations are only valid when operating in a single- 4778 * queue environment. 4779 **/ 4780 static void igb_update_itr(struct igb_q_vector *q_vector, 4781 struct igb_ring_container *ring_container) 4782 { 4783 unsigned int packets = ring_container->total_packets; 4784 unsigned int bytes = ring_container->total_bytes; 4785 u8 itrval = ring_container->itr; 4786 4787 /* no packets, exit with status unchanged */ 4788 if (packets == 0) 4789 return; 4790 4791 switch (itrval) { 4792 case lowest_latency: 4793 /* handle TSO and jumbo frames */ 4794 if (bytes/packets > 8000) 4795 itrval = bulk_latency; 4796 else if ((packets < 5) && (bytes > 512)) 4797 itrval = low_latency; 4798 break; 4799 case low_latency: /* 50 usec aka 20000 ints/s */ 4800 if (bytes > 10000) { 4801 /* this if handles the TSO accounting */ 4802 if (bytes/packets > 8000) 4803 itrval = bulk_latency; 4804 else if ((packets < 10) || ((bytes/packets) > 1200)) 4805 itrval = bulk_latency; 4806 else if ((packets > 35)) 4807 itrval = lowest_latency; 4808 } else if (bytes/packets > 2000) { 4809 itrval = bulk_latency; 4810 } else if (packets <= 2 && bytes < 512) { 4811 itrval = lowest_latency; 4812 } 4813 break; 4814 case bulk_latency: /* 250 usec aka 4000 ints/s */ 4815 if (bytes > 25000) { 4816 if (packets > 35) 4817 itrval = low_latency; 4818 } else if (bytes < 1500) { 4819 itrval = low_latency; 4820 } 4821 break; 4822 } 4823 4824 /* clear work counters since we have the values we need */ 4825 ring_container->total_bytes = 0; 4826 ring_container->total_packets = 0; 4827 4828 /* write updated itr to ring container */ 4829 ring_container->itr = itrval; 4830 } 4831 4832 static void igb_set_itr(struct igb_q_vector *q_vector) 4833 { 4834 struct igb_adapter *adapter = q_vector->adapter; 4835 u32 new_itr = q_vector->itr_val; 4836 u8 current_itr = 0; 4837 4838 /* for non-gigabit speeds, just fix the interrupt rate at 4000 */ 4839 if (adapter->link_speed != SPEED_1000) { 4840 current_itr = 0; 4841 new_itr = IGB_4K_ITR; 4842 goto set_itr_now; 4843 } 4844 4845 igb_update_itr(q_vector, &q_vector->tx); 4846 igb_update_itr(q_vector, &q_vector->rx); 4847 4848 current_itr = max(q_vector->rx.itr, q_vector->tx.itr); 4849 4850 /* conservative mode (itr 3) eliminates the lowest_latency setting */ 4851 if (current_itr == lowest_latency && 4852 ((q_vector->rx.ring && adapter->rx_itr_setting == 3) || 4853 (!q_vector->rx.ring && adapter->tx_itr_setting == 3))) 4854 current_itr = low_latency; 4855 4856 switch (current_itr) { 4857 /* counts and packets in update_itr are dependent on these numbers */ 4858 case lowest_latency: 4859 new_itr = IGB_70K_ITR; /* 70,000 ints/sec */ 4860 break; 4861 case low_latency: 4862 new_itr = IGB_20K_ITR; /* 20,000 ints/sec */ 4863 break; 4864 case bulk_latency: 4865 new_itr = IGB_4K_ITR; /* 4,000 ints/sec */ 4866 break; 4867 default: 4868 break; 4869 } 4870 4871 set_itr_now: 4872 if (new_itr != q_vector->itr_val) { 4873 /* this attempts to bias the interrupt rate towards Bulk 4874 * by adding intermediate steps when interrupt rate is 4875 * increasing 4876 */ 4877 new_itr = new_itr > q_vector->itr_val ? 4878 max((new_itr * q_vector->itr_val) / 4879 (new_itr + (q_vector->itr_val >> 2)), 4880 new_itr) : new_itr; 4881 /* Don't write the value here; it resets the adapter's 4882 * internal timer, and causes us to delay far longer than 4883 * we should between interrupts. Instead, we write the ITR 4884 * value at the beginning of the next interrupt so the timing 4885 * ends up being correct. 4886 */ 4887 q_vector->itr_val = new_itr; 4888 q_vector->set_itr = 1; 4889 } 4890 } 4891 4892 static void igb_tx_ctxtdesc(struct igb_ring *tx_ring, u32 vlan_macip_lens, 4893 u32 type_tucmd, u32 mss_l4len_idx) 4894 { 4895 struct e1000_adv_tx_context_desc *context_desc; 4896 u16 i = tx_ring->next_to_use; 4897 4898 context_desc = IGB_TX_CTXTDESC(tx_ring, i); 4899 4900 i++; 4901 tx_ring->next_to_use = (i < tx_ring->count) ? i : 0; 4902 4903 /* set bits to identify this as an advanced context descriptor */ 4904 type_tucmd |= E1000_TXD_CMD_DEXT | E1000_ADVTXD_DTYP_CTXT; 4905 4906 /* For 82575, context index must be unique per ring. */ 4907 if (test_bit(IGB_RING_FLAG_TX_CTX_IDX, &tx_ring->flags)) 4908 mss_l4len_idx |= tx_ring->reg_idx << 4; 4909 4910 context_desc->vlan_macip_lens = cpu_to_le32(vlan_macip_lens); 4911 context_desc->seqnum_seed = 0; 4912 context_desc->type_tucmd_mlhl = cpu_to_le32(type_tucmd); 4913 context_desc->mss_l4len_idx = cpu_to_le32(mss_l4len_idx); 4914 } 4915 4916 static int igb_tso(struct igb_ring *tx_ring, 4917 struct igb_tx_buffer *first, 4918 u8 *hdr_len) 4919 { 4920 u32 vlan_macip_lens, type_tucmd, mss_l4len_idx; 4921 struct sk_buff *skb = first->skb; 4922 union { 4923 struct iphdr *v4; 4924 struct ipv6hdr *v6; 4925 unsigned char *hdr; 4926 } ip; 4927 union { 4928 struct tcphdr *tcp; 4929 unsigned char *hdr; 4930 } l4; 4931 u32 paylen, l4_offset; 4932 int err; 4933 4934 if (skb->ip_summed != CHECKSUM_PARTIAL) 4935 return 0; 4936 4937 if (!skb_is_gso(skb)) 4938 return 0; 4939 4940 err = skb_cow_head(skb, 0); 4941 if (err < 0) 4942 return err; 4943 4944 ip.hdr = skb_network_header(skb); 4945 l4.hdr = skb_checksum_start(skb); 4946 4947 /* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */ 4948 type_tucmd = E1000_ADVTXD_TUCMD_L4T_TCP; 4949 4950 /* initialize outer IP header fields */ 4951 if (ip.v4->version == 4) { 4952 unsigned char *csum_start = skb_checksum_start(skb); 4953 unsigned char *trans_start = ip.hdr + (ip.v4->ihl * 4); 4954 4955 /* IP header will have to cancel out any data that 4956 * is not a part of the outer IP header 4957 */ 4958 ip.v4->check = csum_fold(csum_partial(trans_start, 4959 csum_start - trans_start, 4960 0)); 4961 type_tucmd |= E1000_ADVTXD_TUCMD_IPV4; 4962 4963 ip.v4->tot_len = 0; 4964 first->tx_flags |= IGB_TX_FLAGS_TSO | 4965 IGB_TX_FLAGS_CSUM | 4966 IGB_TX_FLAGS_IPV4; 4967 } else { 4968 ip.v6->payload_len = 0; 4969 first->tx_flags |= IGB_TX_FLAGS_TSO | 4970 IGB_TX_FLAGS_CSUM; 4971 } 4972 4973 /* determine offset of inner transport header */ 4974 l4_offset = l4.hdr - skb->data; 4975 4976 /* compute length of segmentation header */ 4977 *hdr_len = (l4.tcp->doff * 4) + l4_offset; 4978 4979 /* remove payload length from inner checksum */ 4980 paylen = skb->len - l4_offset; 4981 csum_replace_by_diff(&l4.tcp->check, htonl(paylen)); 4982 4983 /* update gso size and bytecount with header size */ 4984 first->gso_segs = skb_shinfo(skb)->gso_segs; 4985 first->bytecount += (first->gso_segs - 1) * *hdr_len; 4986 4987 /* MSS L4LEN IDX */ 4988 mss_l4len_idx = (*hdr_len - l4_offset) << E1000_ADVTXD_L4LEN_SHIFT; 4989 mss_l4len_idx |= skb_shinfo(skb)->gso_size << E1000_ADVTXD_MSS_SHIFT; 4990 4991 /* VLAN MACLEN IPLEN */ 4992 vlan_macip_lens = l4.hdr - ip.hdr; 4993 vlan_macip_lens |= (ip.hdr - skb->data) << E1000_ADVTXD_MACLEN_SHIFT; 4994 vlan_macip_lens |= first->tx_flags & IGB_TX_FLAGS_VLAN_MASK; 4995 4996 igb_tx_ctxtdesc(tx_ring, vlan_macip_lens, type_tucmd, mss_l4len_idx); 4997 4998 return 1; 4999 } 5000 5001 static inline bool igb_ipv6_csum_is_sctp(struct sk_buff *skb) 5002 { 5003 unsigned int offset = 0; 5004 5005 ipv6_find_hdr(skb, &offset, IPPROTO_SCTP, NULL, NULL); 5006 5007 return offset == skb_checksum_start_offset(skb); 5008 } 5009 5010 static void igb_tx_csum(struct igb_ring *tx_ring, struct igb_tx_buffer *first) 5011 { 5012 struct sk_buff *skb = first->skb; 5013 u32 vlan_macip_lens = 0; 5014 u32 type_tucmd = 0; 5015 5016 if (skb->ip_summed != CHECKSUM_PARTIAL) { 5017 csum_failed: 5018 if (!(first->tx_flags & IGB_TX_FLAGS_VLAN)) 5019 return; 5020 goto no_csum; 5021 } 5022 5023 switch (skb->csum_offset) { 5024 case offsetof(struct tcphdr, check): 5025 type_tucmd = E1000_ADVTXD_TUCMD_L4T_TCP; 5026 /* fall through */ 5027 case offsetof(struct udphdr, check): 5028 break; 5029 case offsetof(struct sctphdr, checksum): 5030 /* validate that this is actually an SCTP request */ 5031 if (((first->protocol == htons(ETH_P_IP)) && 5032 (ip_hdr(skb)->protocol == IPPROTO_SCTP)) || 5033 ((first->protocol == htons(ETH_P_IPV6)) && 5034 igb_ipv6_csum_is_sctp(skb))) { 5035 type_tucmd = E1000_ADVTXD_TUCMD_L4T_SCTP; 5036 break; 5037 } 5038 default: 5039 skb_checksum_help(skb); 5040 goto csum_failed; 5041 } 5042 5043 /* update TX checksum flag */ 5044 first->tx_flags |= IGB_TX_FLAGS_CSUM; 5045 vlan_macip_lens = skb_checksum_start_offset(skb) - 5046 skb_network_offset(skb); 5047 no_csum: 5048 vlan_macip_lens |= skb_network_offset(skb) << E1000_ADVTXD_MACLEN_SHIFT; 5049 vlan_macip_lens |= first->tx_flags & IGB_TX_FLAGS_VLAN_MASK; 5050 5051 igb_tx_ctxtdesc(tx_ring, vlan_macip_lens, type_tucmd, 0); 5052 } 5053 5054 #define IGB_SET_FLAG(_input, _flag, _result) \ 5055 ((_flag <= _result) ? \ 5056 ((u32)(_input & _flag) * (_result / _flag)) : \ 5057 ((u32)(_input & _flag) / (_flag / _result))) 5058 5059 static u32 igb_tx_cmd_type(struct sk_buff *skb, u32 tx_flags) 5060 { 5061 /* set type for advanced descriptor with frame checksum insertion */ 5062 u32 cmd_type = E1000_ADVTXD_DTYP_DATA | 5063 E1000_ADVTXD_DCMD_DEXT | 5064 E1000_ADVTXD_DCMD_IFCS; 5065 5066 /* set HW vlan bit if vlan is present */ 5067 cmd_type |= IGB_SET_FLAG(tx_flags, IGB_TX_FLAGS_VLAN, 5068 (E1000_ADVTXD_DCMD_VLE)); 5069 5070 /* set segmentation bits for TSO */ 5071 cmd_type |= IGB_SET_FLAG(tx_flags, IGB_TX_FLAGS_TSO, 5072 (E1000_ADVTXD_DCMD_TSE)); 5073 5074 /* set timestamp bit if present */ 5075 cmd_type |= IGB_SET_FLAG(tx_flags, IGB_TX_FLAGS_TSTAMP, 5076 (E1000_ADVTXD_MAC_TSTAMP)); 5077 5078 /* insert frame checksum */ 5079 cmd_type ^= IGB_SET_FLAG(skb->no_fcs, 1, E1000_ADVTXD_DCMD_IFCS); 5080 5081 return cmd_type; 5082 } 5083 5084 static void igb_tx_olinfo_status(struct igb_ring *tx_ring, 5085 union e1000_adv_tx_desc *tx_desc, 5086 u32 tx_flags, unsigned int paylen) 5087 { 5088 u32 olinfo_status = paylen << E1000_ADVTXD_PAYLEN_SHIFT; 5089 5090 /* 82575 requires a unique index per ring */ 5091 if (test_bit(IGB_RING_FLAG_TX_CTX_IDX, &tx_ring->flags)) 5092 olinfo_status |= tx_ring->reg_idx << 4; 5093 5094 /* insert L4 checksum */ 5095 olinfo_status |= IGB_SET_FLAG(tx_flags, 5096 IGB_TX_FLAGS_CSUM, 5097 (E1000_TXD_POPTS_TXSM << 8)); 5098 5099 /* insert IPv4 checksum */ 5100 olinfo_status |= IGB_SET_FLAG(tx_flags, 5101 IGB_TX_FLAGS_IPV4, 5102 (E1000_TXD_POPTS_IXSM << 8)); 5103 5104 tx_desc->read.olinfo_status = cpu_to_le32(olinfo_status); 5105 } 5106 5107 static int __igb_maybe_stop_tx(struct igb_ring *tx_ring, const u16 size) 5108 { 5109 struct net_device *netdev = tx_ring->netdev; 5110 5111 netif_stop_subqueue(netdev, tx_ring->queue_index); 5112 5113 /* Herbert's original patch had: 5114 * smp_mb__after_netif_stop_queue(); 5115 * but since that doesn't exist yet, just open code it. 5116 */ 5117 smp_mb(); 5118 5119 /* We need to check again in a case another CPU has just 5120 * made room available. 5121 */ 5122 if (igb_desc_unused(tx_ring) < size) 5123 return -EBUSY; 5124 5125 /* A reprieve! */ 5126 netif_wake_subqueue(netdev, tx_ring->queue_index); 5127 5128 u64_stats_update_begin(&tx_ring->tx_syncp2); 5129 tx_ring->tx_stats.restart_queue2++; 5130 u64_stats_update_end(&tx_ring->tx_syncp2); 5131 5132 return 0; 5133 } 5134 5135 static inline int igb_maybe_stop_tx(struct igb_ring *tx_ring, const u16 size) 5136 { 5137 if (igb_desc_unused(tx_ring) >= size) 5138 return 0; 5139 return __igb_maybe_stop_tx(tx_ring, size); 5140 } 5141 5142 static void igb_tx_map(struct igb_ring *tx_ring, 5143 struct igb_tx_buffer *first, 5144 const u8 hdr_len) 5145 { 5146 struct sk_buff *skb = first->skb; 5147 struct igb_tx_buffer *tx_buffer; 5148 union e1000_adv_tx_desc *tx_desc; 5149 struct skb_frag_struct *frag; 5150 dma_addr_t dma; 5151 unsigned int data_len, size; 5152 u32 tx_flags = first->tx_flags; 5153 u32 cmd_type = igb_tx_cmd_type(skb, tx_flags); 5154 u16 i = tx_ring->next_to_use; 5155 5156 tx_desc = IGB_TX_DESC(tx_ring, i); 5157 5158 igb_tx_olinfo_status(tx_ring, tx_desc, tx_flags, skb->len - hdr_len); 5159 5160 size = skb_headlen(skb); 5161 data_len = skb->data_len; 5162 5163 dma = dma_map_single(tx_ring->dev, skb->data, size, DMA_TO_DEVICE); 5164 5165 tx_buffer = first; 5166 5167 for (frag = &skb_shinfo(skb)->frags[0];; frag++) { 5168 if (dma_mapping_error(tx_ring->dev, dma)) 5169 goto dma_error; 5170 5171 /* record length, and DMA address */ 5172 dma_unmap_len_set(tx_buffer, len, size); 5173 dma_unmap_addr_set(tx_buffer, dma, dma); 5174 5175 tx_desc->read.buffer_addr = cpu_to_le64(dma); 5176 5177 while (unlikely(size > IGB_MAX_DATA_PER_TXD)) { 5178 tx_desc->read.cmd_type_len = 5179 cpu_to_le32(cmd_type ^ IGB_MAX_DATA_PER_TXD); 5180 5181 i++; 5182 tx_desc++; 5183 if (i == tx_ring->count) { 5184 tx_desc = IGB_TX_DESC(tx_ring, 0); 5185 i = 0; 5186 } 5187 tx_desc->read.olinfo_status = 0; 5188 5189 dma += IGB_MAX_DATA_PER_TXD; 5190 size -= IGB_MAX_DATA_PER_TXD; 5191 5192 tx_desc->read.buffer_addr = cpu_to_le64(dma); 5193 } 5194 5195 if (likely(!data_len)) 5196 break; 5197 5198 tx_desc->read.cmd_type_len = cpu_to_le32(cmd_type ^ size); 5199 5200 i++; 5201 tx_desc++; 5202 if (i == tx_ring->count) { 5203 tx_desc = IGB_TX_DESC(tx_ring, 0); 5204 i = 0; 5205 } 5206 tx_desc->read.olinfo_status = 0; 5207 5208 size = skb_frag_size(frag); 5209 data_len -= size; 5210 5211 dma = skb_frag_dma_map(tx_ring->dev, frag, 0, 5212 size, DMA_TO_DEVICE); 5213 5214 tx_buffer = &tx_ring->tx_buffer_info[i]; 5215 } 5216 5217 /* write last descriptor with RS and EOP bits */ 5218 cmd_type |= size | IGB_TXD_DCMD; 5219 tx_desc->read.cmd_type_len = cpu_to_le32(cmd_type); 5220 5221 netdev_tx_sent_queue(txring_txq(tx_ring), first->bytecount); 5222 5223 /* set the timestamp */ 5224 first->time_stamp = jiffies; 5225 5226 /* Force memory writes to complete before letting h/w know there 5227 * are new descriptors to fetch. (Only applicable for weak-ordered 5228 * memory model archs, such as IA-64). 5229 * 5230 * We also need this memory barrier to make certain all of the 5231 * status bits have been updated before next_to_watch is written. 5232 */ 5233 wmb(); 5234 5235 /* set next_to_watch value indicating a packet is present */ 5236 first->next_to_watch = tx_desc; 5237 5238 i++; 5239 if (i == tx_ring->count) 5240 i = 0; 5241 5242 tx_ring->next_to_use = i; 5243 5244 /* Make sure there is space in the ring for the next send. */ 5245 igb_maybe_stop_tx(tx_ring, DESC_NEEDED); 5246 5247 if (netif_xmit_stopped(txring_txq(tx_ring)) || !skb->xmit_more) { 5248 writel(i, tx_ring->tail); 5249 5250 /* we need this if more than one processor can write to our tail 5251 * at a time, it synchronizes IO on IA64/Altix systems 5252 */ 5253 mmiowb(); 5254 } 5255 return; 5256 5257 dma_error: 5258 dev_err(tx_ring->dev, "TX DMA map failed\n"); 5259 5260 /* clear dma mappings for failed tx_buffer_info map */ 5261 for (;;) { 5262 tx_buffer = &tx_ring->tx_buffer_info[i]; 5263 igb_unmap_and_free_tx_resource(tx_ring, tx_buffer); 5264 if (tx_buffer == first) 5265 break; 5266 if (i == 0) 5267 i = tx_ring->count; 5268 i--; 5269 } 5270 5271 tx_ring->next_to_use = i; 5272 } 5273 5274 netdev_tx_t igb_xmit_frame_ring(struct sk_buff *skb, 5275 struct igb_ring *tx_ring) 5276 { 5277 struct igb_tx_buffer *first; 5278 int tso; 5279 u32 tx_flags = 0; 5280 unsigned short f; 5281 u16 count = TXD_USE_COUNT(skb_headlen(skb)); 5282 __be16 protocol = vlan_get_protocol(skb); 5283 u8 hdr_len = 0; 5284 5285 /* need: 1 descriptor per page * PAGE_SIZE/IGB_MAX_DATA_PER_TXD, 5286 * + 1 desc for skb_headlen/IGB_MAX_DATA_PER_TXD, 5287 * + 2 desc gap to keep tail from touching head, 5288 * + 1 desc for context descriptor, 5289 * otherwise try next time 5290 */ 5291 for (f = 0; f < skb_shinfo(skb)->nr_frags; f++) 5292 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size); 5293 5294 if (igb_maybe_stop_tx(tx_ring, count + 3)) { 5295 /* this is a hard error */ 5296 return NETDEV_TX_BUSY; 5297 } 5298 5299 /* record the location of the first descriptor for this packet */ 5300 first = &tx_ring->tx_buffer_info[tx_ring->next_to_use]; 5301 first->skb = skb; 5302 first->bytecount = skb->len; 5303 first->gso_segs = 1; 5304 5305 if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP)) { 5306 struct igb_adapter *adapter = netdev_priv(tx_ring->netdev); 5307 5308 if (!test_and_set_bit_lock(__IGB_PTP_TX_IN_PROGRESS, 5309 &adapter->state)) { 5310 skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS; 5311 tx_flags |= IGB_TX_FLAGS_TSTAMP; 5312 5313 adapter->ptp_tx_skb = skb_get(skb); 5314 adapter->ptp_tx_start = jiffies; 5315 if (adapter->hw.mac.type == e1000_82576) 5316 schedule_work(&adapter->ptp_tx_work); 5317 } 5318 } 5319 5320 skb_tx_timestamp(skb); 5321 5322 if (skb_vlan_tag_present(skb)) { 5323 tx_flags |= IGB_TX_FLAGS_VLAN; 5324 tx_flags |= (skb_vlan_tag_get(skb) << IGB_TX_FLAGS_VLAN_SHIFT); 5325 } 5326 5327 /* record initial flags and protocol */ 5328 first->tx_flags = tx_flags; 5329 first->protocol = protocol; 5330 5331 tso = igb_tso(tx_ring, first, &hdr_len); 5332 if (tso < 0) 5333 goto out_drop; 5334 else if (!tso) 5335 igb_tx_csum(tx_ring, first); 5336 5337 igb_tx_map(tx_ring, first, hdr_len); 5338 5339 return NETDEV_TX_OK; 5340 5341 out_drop: 5342 igb_unmap_and_free_tx_resource(tx_ring, first); 5343 5344 return NETDEV_TX_OK; 5345 } 5346 5347 static inline struct igb_ring *igb_tx_queue_mapping(struct igb_adapter *adapter, 5348 struct sk_buff *skb) 5349 { 5350 unsigned int r_idx = skb->queue_mapping; 5351 5352 if (r_idx >= adapter->num_tx_queues) 5353 r_idx = r_idx % adapter->num_tx_queues; 5354 5355 return adapter->tx_ring[r_idx]; 5356 } 5357 5358 static netdev_tx_t igb_xmit_frame(struct sk_buff *skb, 5359 struct net_device *netdev) 5360 { 5361 struct igb_adapter *adapter = netdev_priv(netdev); 5362 5363 /* The minimum packet size with TCTL.PSP set is 17 so pad the skb 5364 * in order to meet this minimum size requirement. 5365 */ 5366 if (skb_put_padto(skb, 17)) 5367 return NETDEV_TX_OK; 5368 5369 return igb_xmit_frame_ring(skb, igb_tx_queue_mapping(adapter, skb)); 5370 } 5371 5372 /** 5373 * igb_tx_timeout - Respond to a Tx Hang 5374 * @netdev: network interface device structure 5375 **/ 5376 static void igb_tx_timeout(struct net_device *netdev) 5377 { 5378 struct igb_adapter *adapter = netdev_priv(netdev); 5379 struct e1000_hw *hw = &adapter->hw; 5380 5381 /* Do the reset outside of interrupt context */ 5382 adapter->tx_timeout_count++; 5383 5384 if (hw->mac.type >= e1000_82580) 5385 hw->dev_spec._82575.global_device_reset = true; 5386 5387 schedule_work(&adapter->reset_task); 5388 wr32(E1000_EICS, 5389 (adapter->eims_enable_mask & ~adapter->eims_other)); 5390 } 5391 5392 static void igb_reset_task(struct work_struct *work) 5393 { 5394 struct igb_adapter *adapter; 5395 adapter = container_of(work, struct igb_adapter, reset_task); 5396 5397 igb_dump(adapter); 5398 netdev_err(adapter->netdev, "Reset adapter\n"); 5399 igb_reinit_locked(adapter); 5400 } 5401 5402 /** 5403 * igb_get_stats64 - Get System Network Statistics 5404 * @netdev: network interface device structure 5405 * @stats: rtnl_link_stats64 pointer 5406 **/ 5407 static void igb_get_stats64(struct net_device *netdev, 5408 struct rtnl_link_stats64 *stats) 5409 { 5410 struct igb_adapter *adapter = netdev_priv(netdev); 5411 5412 spin_lock(&adapter->stats64_lock); 5413 igb_update_stats(adapter, &adapter->stats64); 5414 memcpy(stats, &adapter->stats64, sizeof(*stats)); 5415 spin_unlock(&adapter->stats64_lock); 5416 } 5417 5418 /** 5419 * igb_change_mtu - Change the Maximum Transfer Unit 5420 * @netdev: network interface device structure 5421 * @new_mtu: new value for maximum frame size 5422 * 5423 * Returns 0 on success, negative on failure 5424 **/ 5425 static int igb_change_mtu(struct net_device *netdev, int new_mtu) 5426 { 5427 struct igb_adapter *adapter = netdev_priv(netdev); 5428 struct pci_dev *pdev = adapter->pdev; 5429 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN; 5430 5431 /* adjust max frame to be at least the size of a standard frame */ 5432 if (max_frame < (ETH_FRAME_LEN + ETH_FCS_LEN)) 5433 max_frame = ETH_FRAME_LEN + ETH_FCS_LEN; 5434 5435 while (test_and_set_bit(__IGB_RESETTING, &adapter->state)) 5436 usleep_range(1000, 2000); 5437 5438 /* igb_down has a dependency on max_frame_size */ 5439 adapter->max_frame_size = max_frame; 5440 5441 if (netif_running(netdev)) 5442 igb_down(adapter); 5443 5444 dev_info(&pdev->dev, "changing MTU from %d to %d\n", 5445 netdev->mtu, new_mtu); 5446 netdev->mtu = new_mtu; 5447 5448 if (netif_running(netdev)) 5449 igb_up(adapter); 5450 else 5451 igb_reset(adapter); 5452 5453 clear_bit(__IGB_RESETTING, &adapter->state); 5454 5455 return 0; 5456 } 5457 5458 /** 5459 * igb_update_stats - Update the board statistics counters 5460 * @adapter: board private structure 5461 **/ 5462 void igb_update_stats(struct igb_adapter *adapter, 5463 struct rtnl_link_stats64 *net_stats) 5464 { 5465 struct e1000_hw *hw = &adapter->hw; 5466 struct pci_dev *pdev = adapter->pdev; 5467 u32 reg, mpc; 5468 int i; 5469 u64 bytes, packets; 5470 unsigned int start; 5471 u64 _bytes, _packets; 5472 5473 /* Prevent stats update while adapter is being reset, or if the pci 5474 * connection is down. 5475 */ 5476 if (adapter->link_speed == 0) 5477 return; 5478 if (pci_channel_offline(pdev)) 5479 return; 5480 5481 bytes = 0; 5482 packets = 0; 5483 5484 rcu_read_lock(); 5485 for (i = 0; i < adapter->num_rx_queues; i++) { 5486 struct igb_ring *ring = adapter->rx_ring[i]; 5487 u32 rqdpc = rd32(E1000_RQDPC(i)); 5488 if (hw->mac.type >= e1000_i210) 5489 wr32(E1000_RQDPC(i), 0); 5490 5491 if (rqdpc) { 5492 ring->rx_stats.drops += rqdpc; 5493 net_stats->rx_fifo_errors += rqdpc; 5494 } 5495 5496 do { 5497 start = u64_stats_fetch_begin_irq(&ring->rx_syncp); 5498 _bytes = ring->rx_stats.bytes; 5499 _packets = ring->rx_stats.packets; 5500 } while (u64_stats_fetch_retry_irq(&ring->rx_syncp, start)); 5501 bytes += _bytes; 5502 packets += _packets; 5503 } 5504 5505 net_stats->rx_bytes = bytes; 5506 net_stats->rx_packets = packets; 5507 5508 bytes = 0; 5509 packets = 0; 5510 for (i = 0; i < adapter->num_tx_queues; i++) { 5511 struct igb_ring *ring = adapter->tx_ring[i]; 5512 do { 5513 start = u64_stats_fetch_begin_irq(&ring->tx_syncp); 5514 _bytes = ring->tx_stats.bytes; 5515 _packets = ring->tx_stats.packets; 5516 } while (u64_stats_fetch_retry_irq(&ring->tx_syncp, start)); 5517 bytes += _bytes; 5518 packets += _packets; 5519 } 5520 net_stats->tx_bytes = bytes; 5521 net_stats->tx_packets = packets; 5522 rcu_read_unlock(); 5523 5524 /* read stats registers */ 5525 adapter->stats.crcerrs += rd32(E1000_CRCERRS); 5526 adapter->stats.gprc += rd32(E1000_GPRC); 5527 adapter->stats.gorc += rd32(E1000_GORCL); 5528 rd32(E1000_GORCH); /* clear GORCL */ 5529 adapter->stats.bprc += rd32(E1000_BPRC); 5530 adapter->stats.mprc += rd32(E1000_MPRC); 5531 adapter->stats.roc += rd32(E1000_ROC); 5532 5533 adapter->stats.prc64 += rd32(E1000_PRC64); 5534 adapter->stats.prc127 += rd32(E1000_PRC127); 5535 adapter->stats.prc255 += rd32(E1000_PRC255); 5536 adapter->stats.prc511 += rd32(E1000_PRC511); 5537 adapter->stats.prc1023 += rd32(E1000_PRC1023); 5538 adapter->stats.prc1522 += rd32(E1000_PRC1522); 5539 adapter->stats.symerrs += rd32(E1000_SYMERRS); 5540 adapter->stats.sec += rd32(E1000_SEC); 5541 5542 mpc = rd32(E1000_MPC); 5543 adapter->stats.mpc += mpc; 5544 net_stats->rx_fifo_errors += mpc; 5545 adapter->stats.scc += rd32(E1000_SCC); 5546 adapter->stats.ecol += rd32(E1000_ECOL); 5547 adapter->stats.mcc += rd32(E1000_MCC); 5548 adapter->stats.latecol += rd32(E1000_LATECOL); 5549 adapter->stats.dc += rd32(E1000_DC); 5550 adapter->stats.rlec += rd32(E1000_RLEC); 5551 adapter->stats.xonrxc += rd32(E1000_XONRXC); 5552 adapter->stats.xontxc += rd32(E1000_XONTXC); 5553 adapter->stats.xoffrxc += rd32(E1000_XOFFRXC); 5554 adapter->stats.xofftxc += rd32(E1000_XOFFTXC); 5555 adapter->stats.fcruc += rd32(E1000_FCRUC); 5556 adapter->stats.gptc += rd32(E1000_GPTC); 5557 adapter->stats.gotc += rd32(E1000_GOTCL); 5558 rd32(E1000_GOTCH); /* clear GOTCL */ 5559 adapter->stats.rnbc += rd32(E1000_RNBC); 5560 adapter->stats.ruc += rd32(E1000_RUC); 5561 adapter->stats.rfc += rd32(E1000_RFC); 5562 adapter->stats.rjc += rd32(E1000_RJC); 5563 adapter->stats.tor += rd32(E1000_TORH); 5564 adapter->stats.tot += rd32(E1000_TOTH); 5565 adapter->stats.tpr += rd32(E1000_TPR); 5566 5567 adapter->stats.ptc64 += rd32(E1000_PTC64); 5568 adapter->stats.ptc127 += rd32(E1000_PTC127); 5569 adapter->stats.ptc255 += rd32(E1000_PTC255); 5570 adapter->stats.ptc511 += rd32(E1000_PTC511); 5571 adapter->stats.ptc1023 += rd32(E1000_PTC1023); 5572 adapter->stats.ptc1522 += rd32(E1000_PTC1522); 5573 5574 adapter->stats.mptc += rd32(E1000_MPTC); 5575 adapter->stats.bptc += rd32(E1000_BPTC); 5576 5577 adapter->stats.tpt += rd32(E1000_TPT); 5578 adapter->stats.colc += rd32(E1000_COLC); 5579 5580 adapter->stats.algnerrc += rd32(E1000_ALGNERRC); 5581 /* read internal phy specific stats */ 5582 reg = rd32(E1000_CTRL_EXT); 5583 if (!(reg & E1000_CTRL_EXT_LINK_MODE_MASK)) { 5584 adapter->stats.rxerrc += rd32(E1000_RXERRC); 5585 5586 /* this stat has invalid values on i210/i211 */ 5587 if ((hw->mac.type != e1000_i210) && 5588 (hw->mac.type != e1000_i211)) 5589 adapter->stats.tncrs += rd32(E1000_TNCRS); 5590 } 5591 5592 adapter->stats.tsctc += rd32(E1000_TSCTC); 5593 adapter->stats.tsctfc += rd32(E1000_TSCTFC); 5594 5595 adapter->stats.iac += rd32(E1000_IAC); 5596 adapter->stats.icrxoc += rd32(E1000_ICRXOC); 5597 adapter->stats.icrxptc += rd32(E1000_ICRXPTC); 5598 adapter->stats.icrxatc += rd32(E1000_ICRXATC); 5599 adapter->stats.ictxptc += rd32(E1000_ICTXPTC); 5600 adapter->stats.ictxatc += rd32(E1000_ICTXATC); 5601 adapter->stats.ictxqec += rd32(E1000_ICTXQEC); 5602 adapter->stats.ictxqmtc += rd32(E1000_ICTXQMTC); 5603 adapter->stats.icrxdmtc += rd32(E1000_ICRXDMTC); 5604 5605 /* Fill out the OS statistics structure */ 5606 net_stats->multicast = adapter->stats.mprc; 5607 net_stats->collisions = adapter->stats.colc; 5608 5609 /* Rx Errors */ 5610 5611 /* RLEC on some newer hardware can be incorrect so build 5612 * our own version based on RUC and ROC 5613 */ 5614 net_stats->rx_errors = adapter->stats.rxerrc + 5615 adapter->stats.crcerrs + adapter->stats.algnerrc + 5616 adapter->stats.ruc + adapter->stats.roc + 5617 adapter->stats.cexterr; 5618 net_stats->rx_length_errors = adapter->stats.ruc + 5619 adapter->stats.roc; 5620 net_stats->rx_crc_errors = adapter->stats.crcerrs; 5621 net_stats->rx_frame_errors = adapter->stats.algnerrc; 5622 net_stats->rx_missed_errors = adapter->stats.mpc; 5623 5624 /* Tx Errors */ 5625 net_stats->tx_errors = adapter->stats.ecol + 5626 adapter->stats.latecol; 5627 net_stats->tx_aborted_errors = adapter->stats.ecol; 5628 net_stats->tx_window_errors = adapter->stats.latecol; 5629 net_stats->tx_carrier_errors = adapter->stats.tncrs; 5630 5631 /* Tx Dropped needs to be maintained elsewhere */ 5632 5633 /* Management Stats */ 5634 adapter->stats.mgptc += rd32(E1000_MGTPTC); 5635 adapter->stats.mgprc += rd32(E1000_MGTPRC); 5636 adapter->stats.mgpdc += rd32(E1000_MGTPDC); 5637 5638 /* OS2BMC Stats */ 5639 reg = rd32(E1000_MANC); 5640 if (reg & E1000_MANC_EN_BMC2OS) { 5641 adapter->stats.o2bgptc += rd32(E1000_O2BGPTC); 5642 adapter->stats.o2bspc += rd32(E1000_O2BSPC); 5643 adapter->stats.b2ospc += rd32(E1000_B2OSPC); 5644 adapter->stats.b2ogprc += rd32(E1000_B2OGPRC); 5645 } 5646 } 5647 5648 static void igb_tsync_interrupt(struct igb_adapter *adapter) 5649 { 5650 struct e1000_hw *hw = &adapter->hw; 5651 struct ptp_clock_event event; 5652 struct timespec64 ts; 5653 u32 ack = 0, tsauxc, sec, nsec, tsicr = rd32(E1000_TSICR); 5654 5655 if (tsicr & TSINTR_SYS_WRAP) { 5656 event.type = PTP_CLOCK_PPS; 5657 if (adapter->ptp_caps.pps) 5658 ptp_clock_event(adapter->ptp_clock, &event); 5659 else 5660 dev_err(&adapter->pdev->dev, "unexpected SYS WRAP"); 5661 ack |= TSINTR_SYS_WRAP; 5662 } 5663 5664 if (tsicr & E1000_TSICR_TXTS) { 5665 /* retrieve hardware timestamp */ 5666 schedule_work(&adapter->ptp_tx_work); 5667 ack |= E1000_TSICR_TXTS; 5668 } 5669 5670 if (tsicr & TSINTR_TT0) { 5671 spin_lock(&adapter->tmreg_lock); 5672 ts = timespec64_add(adapter->perout[0].start, 5673 adapter->perout[0].period); 5674 /* u32 conversion of tv_sec is safe until y2106 */ 5675 wr32(E1000_TRGTTIML0, ts.tv_nsec); 5676 wr32(E1000_TRGTTIMH0, (u32)ts.tv_sec); 5677 tsauxc = rd32(E1000_TSAUXC); 5678 tsauxc |= TSAUXC_EN_TT0; 5679 wr32(E1000_TSAUXC, tsauxc); 5680 adapter->perout[0].start = ts; 5681 spin_unlock(&adapter->tmreg_lock); 5682 ack |= TSINTR_TT0; 5683 } 5684 5685 if (tsicr & TSINTR_TT1) { 5686 spin_lock(&adapter->tmreg_lock); 5687 ts = timespec64_add(adapter->perout[1].start, 5688 adapter->perout[1].period); 5689 wr32(E1000_TRGTTIML1, ts.tv_nsec); 5690 wr32(E1000_TRGTTIMH1, (u32)ts.tv_sec); 5691 tsauxc = rd32(E1000_TSAUXC); 5692 tsauxc |= TSAUXC_EN_TT1; 5693 wr32(E1000_TSAUXC, tsauxc); 5694 adapter->perout[1].start = ts; 5695 spin_unlock(&adapter->tmreg_lock); 5696 ack |= TSINTR_TT1; 5697 } 5698 5699 if (tsicr & TSINTR_AUTT0) { 5700 nsec = rd32(E1000_AUXSTMPL0); 5701 sec = rd32(E1000_AUXSTMPH0); 5702 event.type = PTP_CLOCK_EXTTS; 5703 event.index = 0; 5704 event.timestamp = sec * 1000000000ULL + nsec; 5705 ptp_clock_event(adapter->ptp_clock, &event); 5706 ack |= TSINTR_AUTT0; 5707 } 5708 5709 if (tsicr & TSINTR_AUTT1) { 5710 nsec = rd32(E1000_AUXSTMPL1); 5711 sec = rd32(E1000_AUXSTMPH1); 5712 event.type = PTP_CLOCK_EXTTS; 5713 event.index = 1; 5714 event.timestamp = sec * 1000000000ULL + nsec; 5715 ptp_clock_event(adapter->ptp_clock, &event); 5716 ack |= TSINTR_AUTT1; 5717 } 5718 5719 /* acknowledge the interrupts */ 5720 wr32(E1000_TSICR, ack); 5721 } 5722 5723 static irqreturn_t igb_msix_other(int irq, void *data) 5724 { 5725 struct igb_adapter *adapter = data; 5726 struct e1000_hw *hw = &adapter->hw; 5727 u32 icr = rd32(E1000_ICR); 5728 /* reading ICR causes bit 31 of EICR to be cleared */ 5729 5730 if (icr & E1000_ICR_DRSTA) 5731 schedule_work(&adapter->reset_task); 5732 5733 if (icr & E1000_ICR_DOUTSYNC) { 5734 /* HW is reporting DMA is out of sync */ 5735 adapter->stats.doosync++; 5736 /* The DMA Out of Sync is also indication of a spoof event 5737 * in IOV mode. Check the Wrong VM Behavior register to 5738 * see if it is really a spoof event. 5739 */ 5740 igb_check_wvbr(adapter); 5741 } 5742 5743 /* Check for a mailbox event */ 5744 if (icr & E1000_ICR_VMMB) 5745 igb_msg_task(adapter); 5746 5747 if (icr & E1000_ICR_LSC) { 5748 hw->mac.get_link_status = 1; 5749 /* guard against interrupt when we're going down */ 5750 if (!test_bit(__IGB_DOWN, &adapter->state)) 5751 mod_timer(&adapter->watchdog_timer, jiffies + 1); 5752 } 5753 5754 if (icr & E1000_ICR_TS) 5755 igb_tsync_interrupt(adapter); 5756 5757 wr32(E1000_EIMS, adapter->eims_other); 5758 5759 return IRQ_HANDLED; 5760 } 5761 5762 static void igb_write_itr(struct igb_q_vector *q_vector) 5763 { 5764 struct igb_adapter *adapter = q_vector->adapter; 5765 u32 itr_val = q_vector->itr_val & 0x7FFC; 5766 5767 if (!q_vector->set_itr) 5768 return; 5769 5770 if (!itr_val) 5771 itr_val = 0x4; 5772 5773 if (adapter->hw.mac.type == e1000_82575) 5774 itr_val |= itr_val << 16; 5775 else 5776 itr_val |= E1000_EITR_CNT_IGNR; 5777 5778 writel(itr_val, q_vector->itr_register); 5779 q_vector->set_itr = 0; 5780 } 5781 5782 static irqreturn_t igb_msix_ring(int irq, void *data) 5783 { 5784 struct igb_q_vector *q_vector = data; 5785 5786 /* Write the ITR value calculated from the previous interrupt. */ 5787 igb_write_itr(q_vector); 5788 5789 napi_schedule(&q_vector->napi); 5790 5791 return IRQ_HANDLED; 5792 } 5793 5794 #ifdef CONFIG_IGB_DCA 5795 static void igb_update_tx_dca(struct igb_adapter *adapter, 5796 struct igb_ring *tx_ring, 5797 int cpu) 5798 { 5799 struct e1000_hw *hw = &adapter->hw; 5800 u32 txctrl = dca3_get_tag(tx_ring->dev, cpu); 5801 5802 if (hw->mac.type != e1000_82575) 5803 txctrl <<= E1000_DCA_TXCTRL_CPUID_SHIFT; 5804 5805 /* We can enable relaxed ordering for reads, but not writes when 5806 * DCA is enabled. This is due to a known issue in some chipsets 5807 * which will cause the DCA tag to be cleared. 5808 */ 5809 txctrl |= E1000_DCA_TXCTRL_DESC_RRO_EN | 5810 E1000_DCA_TXCTRL_DATA_RRO_EN | 5811 E1000_DCA_TXCTRL_DESC_DCA_EN; 5812 5813 wr32(E1000_DCA_TXCTRL(tx_ring->reg_idx), txctrl); 5814 } 5815 5816 static void igb_update_rx_dca(struct igb_adapter *adapter, 5817 struct igb_ring *rx_ring, 5818 int cpu) 5819 { 5820 struct e1000_hw *hw = &adapter->hw; 5821 u32 rxctrl = dca3_get_tag(&adapter->pdev->dev, cpu); 5822 5823 if (hw->mac.type != e1000_82575) 5824 rxctrl <<= E1000_DCA_RXCTRL_CPUID_SHIFT; 5825 5826 /* We can enable relaxed ordering for reads, but not writes when 5827 * DCA is enabled. This is due to a known issue in some chipsets 5828 * which will cause the DCA tag to be cleared. 5829 */ 5830 rxctrl |= E1000_DCA_RXCTRL_DESC_RRO_EN | 5831 E1000_DCA_RXCTRL_DESC_DCA_EN; 5832 5833 wr32(E1000_DCA_RXCTRL(rx_ring->reg_idx), rxctrl); 5834 } 5835 5836 static void igb_update_dca(struct igb_q_vector *q_vector) 5837 { 5838 struct igb_adapter *adapter = q_vector->adapter; 5839 int cpu = get_cpu(); 5840 5841 if (q_vector->cpu == cpu) 5842 goto out_no_update; 5843 5844 if (q_vector->tx.ring) 5845 igb_update_tx_dca(adapter, q_vector->tx.ring, cpu); 5846 5847 if (q_vector->rx.ring) 5848 igb_update_rx_dca(adapter, q_vector->rx.ring, cpu); 5849 5850 q_vector->cpu = cpu; 5851 out_no_update: 5852 put_cpu(); 5853 } 5854 5855 static void igb_setup_dca(struct igb_adapter *adapter) 5856 { 5857 struct e1000_hw *hw = &adapter->hw; 5858 int i; 5859 5860 if (!(adapter->flags & IGB_FLAG_DCA_ENABLED)) 5861 return; 5862 5863 /* Always use CB2 mode, difference is masked in the CB driver. */ 5864 wr32(E1000_DCA_CTRL, E1000_DCA_CTRL_DCA_MODE_CB2); 5865 5866 for (i = 0; i < adapter->num_q_vectors; i++) { 5867 adapter->q_vector[i]->cpu = -1; 5868 igb_update_dca(adapter->q_vector[i]); 5869 } 5870 } 5871 5872 static int __igb_notify_dca(struct device *dev, void *data) 5873 { 5874 struct net_device *netdev = dev_get_drvdata(dev); 5875 struct igb_adapter *adapter = netdev_priv(netdev); 5876 struct pci_dev *pdev = adapter->pdev; 5877 struct e1000_hw *hw = &adapter->hw; 5878 unsigned long event = *(unsigned long *)data; 5879 5880 switch (event) { 5881 case DCA_PROVIDER_ADD: 5882 /* if already enabled, don't do it again */ 5883 if (adapter->flags & IGB_FLAG_DCA_ENABLED) 5884 break; 5885 if (dca_add_requester(dev) == 0) { 5886 adapter->flags |= IGB_FLAG_DCA_ENABLED; 5887 dev_info(&pdev->dev, "DCA enabled\n"); 5888 igb_setup_dca(adapter); 5889 break; 5890 } 5891 /* Fall Through since DCA is disabled. */ 5892 case DCA_PROVIDER_REMOVE: 5893 if (adapter->flags & IGB_FLAG_DCA_ENABLED) { 5894 /* without this a class_device is left 5895 * hanging around in the sysfs model 5896 */ 5897 dca_remove_requester(dev); 5898 dev_info(&pdev->dev, "DCA disabled\n"); 5899 adapter->flags &= ~IGB_FLAG_DCA_ENABLED; 5900 wr32(E1000_DCA_CTRL, E1000_DCA_CTRL_DCA_MODE_DISABLE); 5901 } 5902 break; 5903 } 5904 5905 return 0; 5906 } 5907 5908 static int igb_notify_dca(struct notifier_block *nb, unsigned long event, 5909 void *p) 5910 { 5911 int ret_val; 5912 5913 ret_val = driver_for_each_device(&igb_driver.driver, NULL, &event, 5914 __igb_notify_dca); 5915 5916 return ret_val ? NOTIFY_BAD : NOTIFY_DONE; 5917 } 5918 #endif /* CONFIG_IGB_DCA */ 5919 5920 #ifdef CONFIG_PCI_IOV 5921 static int igb_vf_configure(struct igb_adapter *adapter, int vf) 5922 { 5923 unsigned char mac_addr[ETH_ALEN]; 5924 5925 eth_zero_addr(mac_addr); 5926 igb_set_vf_mac(adapter, vf, mac_addr); 5927 5928 /* By default spoof check is enabled for all VFs */ 5929 adapter->vf_data[vf].spoofchk_enabled = true; 5930 5931 return 0; 5932 } 5933 5934 #endif 5935 static void igb_ping_all_vfs(struct igb_adapter *adapter) 5936 { 5937 struct e1000_hw *hw = &adapter->hw; 5938 u32 ping; 5939 int i; 5940 5941 for (i = 0 ; i < adapter->vfs_allocated_count; i++) { 5942 ping = E1000_PF_CONTROL_MSG; 5943 if (adapter->vf_data[i].flags & IGB_VF_FLAG_CTS) 5944 ping |= E1000_VT_MSGTYPE_CTS; 5945 igb_write_mbx(hw, &ping, 1, i); 5946 } 5947 } 5948 5949 static int igb_set_vf_promisc(struct igb_adapter *adapter, u32 *msgbuf, u32 vf) 5950 { 5951 struct e1000_hw *hw = &adapter->hw; 5952 u32 vmolr = rd32(E1000_VMOLR(vf)); 5953 struct vf_data_storage *vf_data = &adapter->vf_data[vf]; 5954 5955 vf_data->flags &= ~(IGB_VF_FLAG_UNI_PROMISC | 5956 IGB_VF_FLAG_MULTI_PROMISC); 5957 vmolr &= ~(E1000_VMOLR_ROPE | E1000_VMOLR_ROMPE | E1000_VMOLR_MPME); 5958 5959 if (*msgbuf & E1000_VF_SET_PROMISC_MULTICAST) { 5960 vmolr |= E1000_VMOLR_MPME; 5961 vf_data->flags |= IGB_VF_FLAG_MULTI_PROMISC; 5962 *msgbuf &= ~E1000_VF_SET_PROMISC_MULTICAST; 5963 } else { 5964 /* if we have hashes and we are clearing a multicast promisc 5965 * flag we need to write the hashes to the MTA as this step 5966 * was previously skipped 5967 */ 5968 if (vf_data->num_vf_mc_hashes > 30) { 5969 vmolr |= E1000_VMOLR_MPME; 5970 } else if (vf_data->num_vf_mc_hashes) { 5971 int j; 5972 5973 vmolr |= E1000_VMOLR_ROMPE; 5974 for (j = 0; j < vf_data->num_vf_mc_hashes; j++) 5975 igb_mta_set(hw, vf_data->vf_mc_hashes[j]); 5976 } 5977 } 5978 5979 wr32(E1000_VMOLR(vf), vmolr); 5980 5981 /* there are flags left unprocessed, likely not supported */ 5982 if (*msgbuf & E1000_VT_MSGINFO_MASK) 5983 return -EINVAL; 5984 5985 return 0; 5986 } 5987 5988 static int igb_set_vf_multicasts(struct igb_adapter *adapter, 5989 u32 *msgbuf, u32 vf) 5990 { 5991 int n = (msgbuf[0] & E1000_VT_MSGINFO_MASK) >> E1000_VT_MSGINFO_SHIFT; 5992 u16 *hash_list = (u16 *)&msgbuf[1]; 5993 struct vf_data_storage *vf_data = &adapter->vf_data[vf]; 5994 int i; 5995 5996 /* salt away the number of multicast addresses assigned 5997 * to this VF for later use to restore when the PF multi cast 5998 * list changes 5999 */ 6000 vf_data->num_vf_mc_hashes = n; 6001 6002 /* only up to 30 hash values supported */ 6003 if (n > 30) 6004 n = 30; 6005 6006 /* store the hashes for later use */ 6007 for (i = 0; i < n; i++) 6008 vf_data->vf_mc_hashes[i] = hash_list[i]; 6009 6010 /* Flush and reset the mta with the new values */ 6011 igb_set_rx_mode(adapter->netdev); 6012 6013 return 0; 6014 } 6015 6016 static void igb_restore_vf_multicasts(struct igb_adapter *adapter) 6017 { 6018 struct e1000_hw *hw = &adapter->hw; 6019 struct vf_data_storage *vf_data; 6020 int i, j; 6021 6022 for (i = 0; i < adapter->vfs_allocated_count; i++) { 6023 u32 vmolr = rd32(E1000_VMOLR(i)); 6024 6025 vmolr &= ~(E1000_VMOLR_ROMPE | E1000_VMOLR_MPME); 6026 6027 vf_data = &adapter->vf_data[i]; 6028 6029 if ((vf_data->num_vf_mc_hashes > 30) || 6030 (vf_data->flags & IGB_VF_FLAG_MULTI_PROMISC)) { 6031 vmolr |= E1000_VMOLR_MPME; 6032 } else if (vf_data->num_vf_mc_hashes) { 6033 vmolr |= E1000_VMOLR_ROMPE; 6034 for (j = 0; j < vf_data->num_vf_mc_hashes; j++) 6035 igb_mta_set(hw, vf_data->vf_mc_hashes[j]); 6036 } 6037 wr32(E1000_VMOLR(i), vmolr); 6038 } 6039 } 6040 6041 static void igb_clear_vf_vfta(struct igb_adapter *adapter, u32 vf) 6042 { 6043 struct e1000_hw *hw = &adapter->hw; 6044 u32 pool_mask, vlvf_mask, i; 6045 6046 /* create mask for VF and other pools */ 6047 pool_mask = E1000_VLVF_POOLSEL_MASK; 6048 vlvf_mask = BIT(E1000_VLVF_POOLSEL_SHIFT + vf); 6049 6050 /* drop PF from pool bits */ 6051 pool_mask &= ~BIT(E1000_VLVF_POOLSEL_SHIFT + 6052 adapter->vfs_allocated_count); 6053 6054 /* Find the vlan filter for this id */ 6055 for (i = E1000_VLVF_ARRAY_SIZE; i--;) { 6056 u32 vlvf = rd32(E1000_VLVF(i)); 6057 u32 vfta_mask, vid, vfta; 6058 6059 /* remove the vf from the pool */ 6060 if (!(vlvf & vlvf_mask)) 6061 continue; 6062 6063 /* clear out bit from VLVF */ 6064 vlvf ^= vlvf_mask; 6065 6066 /* if other pools are present, just remove ourselves */ 6067 if (vlvf & pool_mask) 6068 goto update_vlvfb; 6069 6070 /* if PF is present, leave VFTA */ 6071 if (vlvf & E1000_VLVF_POOLSEL_MASK) 6072 goto update_vlvf; 6073 6074 vid = vlvf & E1000_VLVF_VLANID_MASK; 6075 vfta_mask = BIT(vid % 32); 6076 6077 /* clear bit from VFTA */ 6078 vfta = adapter->shadow_vfta[vid / 32]; 6079 if (vfta & vfta_mask) 6080 hw->mac.ops.write_vfta(hw, vid / 32, vfta ^ vfta_mask); 6081 update_vlvf: 6082 /* clear pool selection enable */ 6083 if (adapter->flags & IGB_FLAG_VLAN_PROMISC) 6084 vlvf &= E1000_VLVF_POOLSEL_MASK; 6085 else 6086 vlvf = 0; 6087 update_vlvfb: 6088 /* clear pool bits */ 6089 wr32(E1000_VLVF(i), vlvf); 6090 } 6091 } 6092 6093 static int igb_find_vlvf_entry(struct e1000_hw *hw, u32 vlan) 6094 { 6095 u32 vlvf; 6096 int idx; 6097 6098 /* short cut the special case */ 6099 if (vlan == 0) 6100 return 0; 6101 6102 /* Search for the VLAN id in the VLVF entries */ 6103 for (idx = E1000_VLVF_ARRAY_SIZE; --idx;) { 6104 vlvf = rd32(E1000_VLVF(idx)); 6105 if ((vlvf & VLAN_VID_MASK) == vlan) 6106 break; 6107 } 6108 6109 return idx; 6110 } 6111 6112 static void igb_update_pf_vlvf(struct igb_adapter *adapter, u32 vid) 6113 { 6114 struct e1000_hw *hw = &adapter->hw; 6115 u32 bits, pf_id; 6116 int idx; 6117 6118 idx = igb_find_vlvf_entry(hw, vid); 6119 if (!idx) 6120 return; 6121 6122 /* See if any other pools are set for this VLAN filter 6123 * entry other than the PF. 6124 */ 6125 pf_id = adapter->vfs_allocated_count + E1000_VLVF_POOLSEL_SHIFT; 6126 bits = ~BIT(pf_id) & E1000_VLVF_POOLSEL_MASK; 6127 bits &= rd32(E1000_VLVF(idx)); 6128 6129 /* Disable the filter so this falls into the default pool. */ 6130 if (!bits) { 6131 if (adapter->flags & IGB_FLAG_VLAN_PROMISC) 6132 wr32(E1000_VLVF(idx), BIT(pf_id)); 6133 else 6134 wr32(E1000_VLVF(idx), 0); 6135 } 6136 } 6137 6138 static s32 igb_set_vf_vlan(struct igb_adapter *adapter, u32 vid, 6139 bool add, u32 vf) 6140 { 6141 int pf_id = adapter->vfs_allocated_count; 6142 struct e1000_hw *hw = &adapter->hw; 6143 int err; 6144 6145 /* If VLAN overlaps with one the PF is currently monitoring make 6146 * sure that we are able to allocate a VLVF entry. This may be 6147 * redundant but it guarantees PF will maintain visibility to 6148 * the VLAN. 6149 */ 6150 if (add && test_bit(vid, adapter->active_vlans)) { 6151 err = igb_vfta_set(hw, vid, pf_id, true, false); 6152 if (err) 6153 return err; 6154 } 6155 6156 err = igb_vfta_set(hw, vid, vf, add, false); 6157 6158 if (add && !err) 6159 return err; 6160 6161 /* If we failed to add the VF VLAN or we are removing the VF VLAN 6162 * we may need to drop the PF pool bit in order to allow us to free 6163 * up the VLVF resources. 6164 */ 6165 if (test_bit(vid, adapter->active_vlans) || 6166 (adapter->flags & IGB_FLAG_VLAN_PROMISC)) 6167 igb_update_pf_vlvf(adapter, vid); 6168 6169 return err; 6170 } 6171 6172 static void igb_set_vmvir(struct igb_adapter *adapter, u32 vid, u32 vf) 6173 { 6174 struct e1000_hw *hw = &adapter->hw; 6175 6176 if (vid) 6177 wr32(E1000_VMVIR(vf), (vid | E1000_VMVIR_VLANA_DEFAULT)); 6178 else 6179 wr32(E1000_VMVIR(vf), 0); 6180 } 6181 6182 static int igb_enable_port_vlan(struct igb_adapter *adapter, int vf, 6183 u16 vlan, u8 qos) 6184 { 6185 int err; 6186 6187 err = igb_set_vf_vlan(adapter, vlan, true, vf); 6188 if (err) 6189 return err; 6190 6191 igb_set_vmvir(adapter, vlan | (qos << VLAN_PRIO_SHIFT), vf); 6192 igb_set_vmolr(adapter, vf, !vlan); 6193 6194 /* revoke access to previous VLAN */ 6195 if (vlan != adapter->vf_data[vf].pf_vlan) 6196 igb_set_vf_vlan(adapter, adapter->vf_data[vf].pf_vlan, 6197 false, vf); 6198 6199 adapter->vf_data[vf].pf_vlan = vlan; 6200 adapter->vf_data[vf].pf_qos = qos; 6201 igb_set_vf_vlan_strip(adapter, vf, true); 6202 dev_info(&adapter->pdev->dev, 6203 "Setting VLAN %d, QOS 0x%x on VF %d\n", vlan, qos, vf); 6204 if (test_bit(__IGB_DOWN, &adapter->state)) { 6205 dev_warn(&adapter->pdev->dev, 6206 "The VF VLAN has been set, but the PF device is not up.\n"); 6207 dev_warn(&adapter->pdev->dev, 6208 "Bring the PF device up before attempting to use the VF device.\n"); 6209 } 6210 6211 return err; 6212 } 6213 6214 static int igb_disable_port_vlan(struct igb_adapter *adapter, int vf) 6215 { 6216 /* Restore tagless access via VLAN 0 */ 6217 igb_set_vf_vlan(adapter, 0, true, vf); 6218 6219 igb_set_vmvir(adapter, 0, vf); 6220 igb_set_vmolr(adapter, vf, true); 6221 6222 /* Remove any PF assigned VLAN */ 6223 if (adapter->vf_data[vf].pf_vlan) 6224 igb_set_vf_vlan(adapter, adapter->vf_data[vf].pf_vlan, 6225 false, vf); 6226 6227 adapter->vf_data[vf].pf_vlan = 0; 6228 adapter->vf_data[vf].pf_qos = 0; 6229 igb_set_vf_vlan_strip(adapter, vf, false); 6230 6231 return 0; 6232 } 6233 6234 static int igb_ndo_set_vf_vlan(struct net_device *netdev, int vf, 6235 u16 vlan, u8 qos, __be16 vlan_proto) 6236 { 6237 struct igb_adapter *adapter = netdev_priv(netdev); 6238 6239 if ((vf >= adapter->vfs_allocated_count) || (vlan > 4095) || (qos > 7)) 6240 return -EINVAL; 6241 6242 if (vlan_proto != htons(ETH_P_8021Q)) 6243 return -EPROTONOSUPPORT; 6244 6245 return (vlan || qos) ? igb_enable_port_vlan(adapter, vf, vlan, qos) : 6246 igb_disable_port_vlan(adapter, vf); 6247 } 6248 6249 static int igb_set_vf_vlan_msg(struct igb_adapter *adapter, u32 *msgbuf, u32 vf) 6250 { 6251 int add = (msgbuf[0] & E1000_VT_MSGINFO_MASK) >> E1000_VT_MSGINFO_SHIFT; 6252 int vid = (msgbuf[1] & E1000_VLVF_VLANID_MASK); 6253 int ret; 6254 6255 if (adapter->vf_data[vf].pf_vlan) 6256 return -1; 6257 6258 /* VLAN 0 is a special case, don't allow it to be removed */ 6259 if (!vid && !add) 6260 return 0; 6261 6262 ret = igb_set_vf_vlan(adapter, vid, !!add, vf); 6263 if (!ret) 6264 igb_set_vf_vlan_strip(adapter, vf, !!vid); 6265 return ret; 6266 } 6267 6268 static inline void igb_vf_reset(struct igb_adapter *adapter, u32 vf) 6269 { 6270 struct vf_data_storage *vf_data = &adapter->vf_data[vf]; 6271 6272 /* clear flags - except flag that indicates PF has set the MAC */ 6273 vf_data->flags &= IGB_VF_FLAG_PF_SET_MAC; 6274 vf_data->last_nack = jiffies; 6275 6276 /* reset vlans for device */ 6277 igb_clear_vf_vfta(adapter, vf); 6278 igb_set_vf_vlan(adapter, vf_data->pf_vlan, true, vf); 6279 igb_set_vmvir(adapter, vf_data->pf_vlan | 6280 (vf_data->pf_qos << VLAN_PRIO_SHIFT), vf); 6281 igb_set_vmolr(adapter, vf, !vf_data->pf_vlan); 6282 igb_set_vf_vlan_strip(adapter, vf, !!(vf_data->pf_vlan)); 6283 6284 /* reset multicast table array for vf */ 6285 adapter->vf_data[vf].num_vf_mc_hashes = 0; 6286 6287 /* Flush and reset the mta with the new values */ 6288 igb_set_rx_mode(adapter->netdev); 6289 } 6290 6291 static void igb_vf_reset_event(struct igb_adapter *adapter, u32 vf) 6292 { 6293 unsigned char *vf_mac = adapter->vf_data[vf].vf_mac_addresses; 6294 6295 /* clear mac address as we were hotplug removed/added */ 6296 if (!(adapter->vf_data[vf].flags & IGB_VF_FLAG_PF_SET_MAC)) 6297 eth_zero_addr(vf_mac); 6298 6299 /* process remaining reset events */ 6300 igb_vf_reset(adapter, vf); 6301 } 6302 6303 static void igb_vf_reset_msg(struct igb_adapter *adapter, u32 vf) 6304 { 6305 struct e1000_hw *hw = &adapter->hw; 6306 unsigned char *vf_mac = adapter->vf_data[vf].vf_mac_addresses; 6307 int rar_entry = hw->mac.rar_entry_count - (vf + 1); 6308 u32 reg, msgbuf[3]; 6309 u8 *addr = (u8 *)(&msgbuf[1]); 6310 6311 /* process all the same items cleared in a function level reset */ 6312 igb_vf_reset(adapter, vf); 6313 6314 /* set vf mac address */ 6315 igb_rar_set_qsel(adapter, vf_mac, rar_entry, vf); 6316 6317 /* enable transmit and receive for vf */ 6318 reg = rd32(E1000_VFTE); 6319 wr32(E1000_VFTE, reg | BIT(vf)); 6320 reg = rd32(E1000_VFRE); 6321 wr32(E1000_VFRE, reg | BIT(vf)); 6322 6323 adapter->vf_data[vf].flags |= IGB_VF_FLAG_CTS; 6324 6325 /* reply to reset with ack and vf mac address */ 6326 if (!is_zero_ether_addr(vf_mac)) { 6327 msgbuf[0] = E1000_VF_RESET | E1000_VT_MSGTYPE_ACK; 6328 memcpy(addr, vf_mac, ETH_ALEN); 6329 } else { 6330 msgbuf[0] = E1000_VF_RESET | E1000_VT_MSGTYPE_NACK; 6331 } 6332 igb_write_mbx(hw, msgbuf, 3, vf); 6333 } 6334 6335 static int igb_set_vf_mac_addr(struct igb_adapter *adapter, u32 *msg, int vf) 6336 { 6337 /* The VF MAC Address is stored in a packed array of bytes 6338 * starting at the second 32 bit word of the msg array 6339 */ 6340 unsigned char *addr = (char *)&msg[1]; 6341 int err = -1; 6342 6343 if (is_valid_ether_addr(addr)) 6344 err = igb_set_vf_mac(adapter, vf, addr); 6345 6346 return err; 6347 } 6348 6349 static void igb_rcv_ack_from_vf(struct igb_adapter *adapter, u32 vf) 6350 { 6351 struct e1000_hw *hw = &adapter->hw; 6352 struct vf_data_storage *vf_data = &adapter->vf_data[vf]; 6353 u32 msg = E1000_VT_MSGTYPE_NACK; 6354 6355 /* if device isn't clear to send it shouldn't be reading either */ 6356 if (!(vf_data->flags & IGB_VF_FLAG_CTS) && 6357 time_after(jiffies, vf_data->last_nack + (2 * HZ))) { 6358 igb_write_mbx(hw, &msg, 1, vf); 6359 vf_data->last_nack = jiffies; 6360 } 6361 } 6362 6363 static void igb_rcv_msg_from_vf(struct igb_adapter *adapter, u32 vf) 6364 { 6365 struct pci_dev *pdev = adapter->pdev; 6366 u32 msgbuf[E1000_VFMAILBOX_SIZE]; 6367 struct e1000_hw *hw = &adapter->hw; 6368 struct vf_data_storage *vf_data = &adapter->vf_data[vf]; 6369 s32 retval; 6370 6371 retval = igb_read_mbx(hw, msgbuf, E1000_VFMAILBOX_SIZE, vf); 6372 6373 if (retval) { 6374 /* if receive failed revoke VF CTS stats and restart init */ 6375 dev_err(&pdev->dev, "Error receiving message from VF\n"); 6376 vf_data->flags &= ~IGB_VF_FLAG_CTS; 6377 if (!time_after(jiffies, vf_data->last_nack + (2 * HZ))) 6378 return; 6379 goto out; 6380 } 6381 6382 /* this is a message we already processed, do nothing */ 6383 if (msgbuf[0] & (E1000_VT_MSGTYPE_ACK | E1000_VT_MSGTYPE_NACK)) 6384 return; 6385 6386 /* until the vf completes a reset it should not be 6387 * allowed to start any configuration. 6388 */ 6389 if (msgbuf[0] == E1000_VF_RESET) { 6390 igb_vf_reset_msg(adapter, vf); 6391 return; 6392 } 6393 6394 if (!(vf_data->flags & IGB_VF_FLAG_CTS)) { 6395 if (!time_after(jiffies, vf_data->last_nack + (2 * HZ))) 6396 return; 6397 retval = -1; 6398 goto out; 6399 } 6400 6401 switch ((msgbuf[0] & 0xFFFF)) { 6402 case E1000_VF_SET_MAC_ADDR: 6403 retval = -EINVAL; 6404 if (!(vf_data->flags & IGB_VF_FLAG_PF_SET_MAC)) 6405 retval = igb_set_vf_mac_addr(adapter, msgbuf, vf); 6406 else 6407 dev_warn(&pdev->dev, 6408 "VF %d attempted to override administratively set MAC address\nReload the VF driver to resume operations\n", 6409 vf); 6410 break; 6411 case E1000_VF_SET_PROMISC: 6412 retval = igb_set_vf_promisc(adapter, msgbuf, vf); 6413 break; 6414 case E1000_VF_SET_MULTICAST: 6415 retval = igb_set_vf_multicasts(adapter, msgbuf, vf); 6416 break; 6417 case E1000_VF_SET_LPE: 6418 retval = igb_set_vf_rlpml(adapter, msgbuf[1], vf); 6419 break; 6420 case E1000_VF_SET_VLAN: 6421 retval = -1; 6422 if (vf_data->pf_vlan) 6423 dev_warn(&pdev->dev, 6424 "VF %d attempted to override administratively set VLAN tag\nReload the VF driver to resume operations\n", 6425 vf); 6426 else 6427 retval = igb_set_vf_vlan_msg(adapter, msgbuf, vf); 6428 break; 6429 default: 6430 dev_err(&pdev->dev, "Unhandled Msg %08x\n", msgbuf[0]); 6431 retval = -1; 6432 break; 6433 } 6434 6435 msgbuf[0] |= E1000_VT_MSGTYPE_CTS; 6436 out: 6437 /* notify the VF of the results of what it sent us */ 6438 if (retval) 6439 msgbuf[0] |= E1000_VT_MSGTYPE_NACK; 6440 else 6441 msgbuf[0] |= E1000_VT_MSGTYPE_ACK; 6442 6443 igb_write_mbx(hw, msgbuf, 1, vf); 6444 } 6445 6446 static void igb_msg_task(struct igb_adapter *adapter) 6447 { 6448 struct e1000_hw *hw = &adapter->hw; 6449 u32 vf; 6450 6451 for (vf = 0; vf < adapter->vfs_allocated_count; vf++) { 6452 /* process any reset requests */ 6453 if (!igb_check_for_rst(hw, vf)) 6454 igb_vf_reset_event(adapter, vf); 6455 6456 /* process any messages pending */ 6457 if (!igb_check_for_msg(hw, vf)) 6458 igb_rcv_msg_from_vf(adapter, vf); 6459 6460 /* process any acks */ 6461 if (!igb_check_for_ack(hw, vf)) 6462 igb_rcv_ack_from_vf(adapter, vf); 6463 } 6464 } 6465 6466 /** 6467 * igb_set_uta - Set unicast filter table address 6468 * @adapter: board private structure 6469 * @set: boolean indicating if we are setting or clearing bits 6470 * 6471 * The unicast table address is a register array of 32-bit registers. 6472 * The table is meant to be used in a way similar to how the MTA is used 6473 * however due to certain limitations in the hardware it is necessary to 6474 * set all the hash bits to 1 and use the VMOLR ROPE bit as a promiscuous 6475 * enable bit to allow vlan tag stripping when promiscuous mode is enabled 6476 **/ 6477 static void igb_set_uta(struct igb_adapter *adapter, bool set) 6478 { 6479 struct e1000_hw *hw = &adapter->hw; 6480 u32 uta = set ? ~0 : 0; 6481 int i; 6482 6483 /* we only need to do this if VMDq is enabled */ 6484 if (!adapter->vfs_allocated_count) 6485 return; 6486 6487 for (i = hw->mac.uta_reg_count; i--;) 6488 array_wr32(E1000_UTA, i, uta); 6489 } 6490 6491 /** 6492 * igb_intr_msi - Interrupt Handler 6493 * @irq: interrupt number 6494 * @data: pointer to a network interface device structure 6495 **/ 6496 static irqreturn_t igb_intr_msi(int irq, void *data) 6497 { 6498 struct igb_adapter *adapter = data; 6499 struct igb_q_vector *q_vector = adapter->q_vector[0]; 6500 struct e1000_hw *hw = &adapter->hw; 6501 /* read ICR disables interrupts using IAM */ 6502 u32 icr = rd32(E1000_ICR); 6503 6504 igb_write_itr(q_vector); 6505 6506 if (icr & E1000_ICR_DRSTA) 6507 schedule_work(&adapter->reset_task); 6508 6509 if (icr & E1000_ICR_DOUTSYNC) { 6510 /* HW is reporting DMA is out of sync */ 6511 adapter->stats.doosync++; 6512 } 6513 6514 if (icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC)) { 6515 hw->mac.get_link_status = 1; 6516 if (!test_bit(__IGB_DOWN, &adapter->state)) 6517 mod_timer(&adapter->watchdog_timer, jiffies + 1); 6518 } 6519 6520 if (icr & E1000_ICR_TS) 6521 igb_tsync_interrupt(adapter); 6522 6523 napi_schedule(&q_vector->napi); 6524 6525 return IRQ_HANDLED; 6526 } 6527 6528 /** 6529 * igb_intr - Legacy Interrupt Handler 6530 * @irq: interrupt number 6531 * @data: pointer to a network interface device structure 6532 **/ 6533 static irqreturn_t igb_intr(int irq, void *data) 6534 { 6535 struct igb_adapter *adapter = data; 6536 struct igb_q_vector *q_vector = adapter->q_vector[0]; 6537 struct e1000_hw *hw = &adapter->hw; 6538 /* Interrupt Auto-Mask...upon reading ICR, interrupts are masked. No 6539 * need for the IMC write 6540 */ 6541 u32 icr = rd32(E1000_ICR); 6542 6543 /* IMS will not auto-mask if INT_ASSERTED is not set, and if it is 6544 * not set, then the adapter didn't send an interrupt 6545 */ 6546 if (!(icr & E1000_ICR_INT_ASSERTED)) 6547 return IRQ_NONE; 6548 6549 igb_write_itr(q_vector); 6550 6551 if (icr & E1000_ICR_DRSTA) 6552 schedule_work(&adapter->reset_task); 6553 6554 if (icr & E1000_ICR_DOUTSYNC) { 6555 /* HW is reporting DMA is out of sync */ 6556 adapter->stats.doosync++; 6557 } 6558 6559 if (icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC)) { 6560 hw->mac.get_link_status = 1; 6561 /* guard against interrupt when we're going down */ 6562 if (!test_bit(__IGB_DOWN, &adapter->state)) 6563 mod_timer(&adapter->watchdog_timer, jiffies + 1); 6564 } 6565 6566 if (icr & E1000_ICR_TS) 6567 igb_tsync_interrupt(adapter); 6568 6569 napi_schedule(&q_vector->napi); 6570 6571 return IRQ_HANDLED; 6572 } 6573 6574 static void igb_ring_irq_enable(struct igb_q_vector *q_vector) 6575 { 6576 struct igb_adapter *adapter = q_vector->adapter; 6577 struct e1000_hw *hw = &adapter->hw; 6578 6579 if ((q_vector->rx.ring && (adapter->rx_itr_setting & 3)) || 6580 (!q_vector->rx.ring && (adapter->tx_itr_setting & 3))) { 6581 if ((adapter->num_q_vectors == 1) && !adapter->vf_data) 6582 igb_set_itr(q_vector); 6583 else 6584 igb_update_ring_itr(q_vector); 6585 } 6586 6587 if (!test_bit(__IGB_DOWN, &adapter->state)) { 6588 if (adapter->flags & IGB_FLAG_HAS_MSIX) 6589 wr32(E1000_EIMS, q_vector->eims_value); 6590 else 6591 igb_irq_enable(adapter); 6592 } 6593 } 6594 6595 /** 6596 * igb_poll - NAPI Rx polling callback 6597 * @napi: napi polling structure 6598 * @budget: count of how many packets we should handle 6599 **/ 6600 static int igb_poll(struct napi_struct *napi, int budget) 6601 { 6602 struct igb_q_vector *q_vector = container_of(napi, 6603 struct igb_q_vector, 6604 napi); 6605 bool clean_complete = true; 6606 int work_done = 0; 6607 6608 #ifdef CONFIG_IGB_DCA 6609 if (q_vector->adapter->flags & IGB_FLAG_DCA_ENABLED) 6610 igb_update_dca(q_vector); 6611 #endif 6612 if (q_vector->tx.ring) 6613 clean_complete = igb_clean_tx_irq(q_vector, budget); 6614 6615 if (q_vector->rx.ring) { 6616 int cleaned = igb_clean_rx_irq(q_vector, budget); 6617 6618 work_done += cleaned; 6619 if (cleaned >= budget) 6620 clean_complete = false; 6621 } 6622 6623 /* If all work not completed, return budget and keep polling */ 6624 if (!clean_complete) 6625 return budget; 6626 6627 /* If not enough Rx work done, exit the polling mode */ 6628 napi_complete_done(napi, work_done); 6629 igb_ring_irq_enable(q_vector); 6630 6631 return 0; 6632 } 6633 6634 /** 6635 * igb_clean_tx_irq - Reclaim resources after transmit completes 6636 * @q_vector: pointer to q_vector containing needed info 6637 * @napi_budget: Used to determine if we are in netpoll 6638 * 6639 * returns true if ring is completely cleaned 6640 **/ 6641 static bool igb_clean_tx_irq(struct igb_q_vector *q_vector, int napi_budget) 6642 { 6643 struct igb_adapter *adapter = q_vector->adapter; 6644 struct igb_ring *tx_ring = q_vector->tx.ring; 6645 struct igb_tx_buffer *tx_buffer; 6646 union e1000_adv_tx_desc *tx_desc; 6647 unsigned int total_bytes = 0, total_packets = 0; 6648 unsigned int budget = q_vector->tx.work_limit; 6649 unsigned int i = tx_ring->next_to_clean; 6650 6651 if (test_bit(__IGB_DOWN, &adapter->state)) 6652 return true; 6653 6654 tx_buffer = &tx_ring->tx_buffer_info[i]; 6655 tx_desc = IGB_TX_DESC(tx_ring, i); 6656 i -= tx_ring->count; 6657 6658 do { 6659 union e1000_adv_tx_desc *eop_desc = tx_buffer->next_to_watch; 6660 6661 /* if next_to_watch is not set then there is no work pending */ 6662 if (!eop_desc) 6663 break; 6664 6665 /* prevent any other reads prior to eop_desc */ 6666 read_barrier_depends(); 6667 6668 /* if DD is not set pending work has not been completed */ 6669 if (!(eop_desc->wb.status & cpu_to_le32(E1000_TXD_STAT_DD))) 6670 break; 6671 6672 /* clear next_to_watch to prevent false hangs */ 6673 tx_buffer->next_to_watch = NULL; 6674 6675 /* update the statistics for this packet */ 6676 total_bytes += tx_buffer->bytecount; 6677 total_packets += tx_buffer->gso_segs; 6678 6679 /* free the skb */ 6680 napi_consume_skb(tx_buffer->skb, napi_budget); 6681 6682 /* unmap skb header data */ 6683 dma_unmap_single(tx_ring->dev, 6684 dma_unmap_addr(tx_buffer, dma), 6685 dma_unmap_len(tx_buffer, len), 6686 DMA_TO_DEVICE); 6687 6688 /* clear tx_buffer data */ 6689 tx_buffer->skb = NULL; 6690 dma_unmap_len_set(tx_buffer, len, 0); 6691 6692 /* clear last DMA location and unmap remaining buffers */ 6693 while (tx_desc != eop_desc) { 6694 tx_buffer++; 6695 tx_desc++; 6696 i++; 6697 if (unlikely(!i)) { 6698 i -= tx_ring->count; 6699 tx_buffer = tx_ring->tx_buffer_info; 6700 tx_desc = IGB_TX_DESC(tx_ring, 0); 6701 } 6702 6703 /* unmap any remaining paged data */ 6704 if (dma_unmap_len(tx_buffer, len)) { 6705 dma_unmap_page(tx_ring->dev, 6706 dma_unmap_addr(tx_buffer, dma), 6707 dma_unmap_len(tx_buffer, len), 6708 DMA_TO_DEVICE); 6709 dma_unmap_len_set(tx_buffer, len, 0); 6710 } 6711 } 6712 6713 /* move us one more past the eop_desc for start of next pkt */ 6714 tx_buffer++; 6715 tx_desc++; 6716 i++; 6717 if (unlikely(!i)) { 6718 i -= tx_ring->count; 6719 tx_buffer = tx_ring->tx_buffer_info; 6720 tx_desc = IGB_TX_DESC(tx_ring, 0); 6721 } 6722 6723 /* issue prefetch for next Tx descriptor */ 6724 prefetch(tx_desc); 6725 6726 /* update budget accounting */ 6727 budget--; 6728 } while (likely(budget)); 6729 6730 netdev_tx_completed_queue(txring_txq(tx_ring), 6731 total_packets, total_bytes); 6732 i += tx_ring->count; 6733 tx_ring->next_to_clean = i; 6734 u64_stats_update_begin(&tx_ring->tx_syncp); 6735 tx_ring->tx_stats.bytes += total_bytes; 6736 tx_ring->tx_stats.packets += total_packets; 6737 u64_stats_update_end(&tx_ring->tx_syncp); 6738 q_vector->tx.total_bytes += total_bytes; 6739 q_vector->tx.total_packets += total_packets; 6740 6741 if (test_bit(IGB_RING_FLAG_TX_DETECT_HANG, &tx_ring->flags)) { 6742 struct e1000_hw *hw = &adapter->hw; 6743 6744 /* Detect a transmit hang in hardware, this serializes the 6745 * check with the clearing of time_stamp and movement of i 6746 */ 6747 clear_bit(IGB_RING_FLAG_TX_DETECT_HANG, &tx_ring->flags); 6748 if (tx_buffer->next_to_watch && 6749 time_after(jiffies, tx_buffer->time_stamp + 6750 (adapter->tx_timeout_factor * HZ)) && 6751 !(rd32(E1000_STATUS) & E1000_STATUS_TXOFF)) { 6752 6753 /* detected Tx unit hang */ 6754 dev_err(tx_ring->dev, 6755 "Detected Tx Unit Hang\n" 6756 " Tx Queue <%d>\n" 6757 " TDH <%x>\n" 6758 " TDT <%x>\n" 6759 " next_to_use <%x>\n" 6760 " next_to_clean <%x>\n" 6761 "buffer_info[next_to_clean]\n" 6762 " time_stamp <%lx>\n" 6763 " next_to_watch <%p>\n" 6764 " jiffies <%lx>\n" 6765 " desc.status <%x>\n", 6766 tx_ring->queue_index, 6767 rd32(E1000_TDH(tx_ring->reg_idx)), 6768 readl(tx_ring->tail), 6769 tx_ring->next_to_use, 6770 tx_ring->next_to_clean, 6771 tx_buffer->time_stamp, 6772 tx_buffer->next_to_watch, 6773 jiffies, 6774 tx_buffer->next_to_watch->wb.status); 6775 netif_stop_subqueue(tx_ring->netdev, 6776 tx_ring->queue_index); 6777 6778 /* we are about to reset, no point in enabling stuff */ 6779 return true; 6780 } 6781 } 6782 6783 #define TX_WAKE_THRESHOLD (DESC_NEEDED * 2) 6784 if (unlikely(total_packets && 6785 netif_carrier_ok(tx_ring->netdev) && 6786 igb_desc_unused(tx_ring) >= TX_WAKE_THRESHOLD)) { 6787 /* Make sure that anybody stopping the queue after this 6788 * sees the new next_to_clean. 6789 */ 6790 smp_mb(); 6791 if (__netif_subqueue_stopped(tx_ring->netdev, 6792 tx_ring->queue_index) && 6793 !(test_bit(__IGB_DOWN, &adapter->state))) { 6794 netif_wake_subqueue(tx_ring->netdev, 6795 tx_ring->queue_index); 6796 6797 u64_stats_update_begin(&tx_ring->tx_syncp); 6798 tx_ring->tx_stats.restart_queue++; 6799 u64_stats_update_end(&tx_ring->tx_syncp); 6800 } 6801 } 6802 6803 return !!budget; 6804 } 6805 6806 /** 6807 * igb_reuse_rx_page - page flip buffer and store it back on the ring 6808 * @rx_ring: rx descriptor ring to store buffers on 6809 * @old_buff: donor buffer to have page reused 6810 * 6811 * Synchronizes page for reuse by the adapter 6812 **/ 6813 static void igb_reuse_rx_page(struct igb_ring *rx_ring, 6814 struct igb_rx_buffer *old_buff) 6815 { 6816 struct igb_rx_buffer *new_buff; 6817 u16 nta = rx_ring->next_to_alloc; 6818 6819 new_buff = &rx_ring->rx_buffer_info[nta]; 6820 6821 /* update, and store next to alloc */ 6822 nta++; 6823 rx_ring->next_to_alloc = (nta < rx_ring->count) ? nta : 0; 6824 6825 /* transfer page from old buffer to new buffer */ 6826 *new_buff = *old_buff; 6827 } 6828 6829 static inline bool igb_page_is_reserved(struct page *page) 6830 { 6831 return (page_to_nid(page) != numa_mem_id()) || page_is_pfmemalloc(page); 6832 } 6833 6834 static bool igb_can_reuse_rx_page(struct igb_rx_buffer *rx_buffer, 6835 struct page *page, 6836 unsigned int truesize) 6837 { 6838 unsigned int pagecnt_bias = rx_buffer->pagecnt_bias--; 6839 6840 /* avoid re-using remote pages */ 6841 if (unlikely(igb_page_is_reserved(page))) 6842 return false; 6843 6844 #if (PAGE_SIZE < 8192) 6845 /* if we are only owner of page we can reuse it */ 6846 if (unlikely(page_ref_count(page) != pagecnt_bias)) 6847 return false; 6848 6849 /* flip page offset to other buffer */ 6850 rx_buffer->page_offset ^= IGB_RX_BUFSZ; 6851 #else 6852 /* move offset up to the next cache line */ 6853 rx_buffer->page_offset += truesize; 6854 6855 if (rx_buffer->page_offset > (PAGE_SIZE - IGB_RX_BUFSZ)) 6856 return false; 6857 #endif 6858 6859 /* If we have drained the page fragment pool we need to update 6860 * the pagecnt_bias and page count so that we fully restock the 6861 * number of references the driver holds. 6862 */ 6863 if (unlikely(pagecnt_bias == 1)) { 6864 page_ref_add(page, USHRT_MAX); 6865 rx_buffer->pagecnt_bias = USHRT_MAX; 6866 } 6867 6868 return true; 6869 } 6870 6871 /** 6872 * igb_add_rx_frag - Add contents of Rx buffer to sk_buff 6873 * @rx_ring: rx descriptor ring to transact packets on 6874 * @rx_buffer: buffer containing page to add 6875 * @rx_desc: descriptor containing length of buffer written by hardware 6876 * @skb: sk_buff to place the data into 6877 * 6878 * This function will add the data contained in rx_buffer->page to the skb. 6879 * This is done either through a direct copy if the data in the buffer is 6880 * less than the skb header size, otherwise it will just attach the page as 6881 * a frag to the skb. 6882 * 6883 * The function will then update the page offset if necessary and return 6884 * true if the buffer can be reused by the adapter. 6885 **/ 6886 static bool igb_add_rx_frag(struct igb_ring *rx_ring, 6887 struct igb_rx_buffer *rx_buffer, 6888 unsigned int size, 6889 union e1000_adv_rx_desc *rx_desc, 6890 struct sk_buff *skb) 6891 { 6892 struct page *page = rx_buffer->page; 6893 unsigned char *va = page_address(page) + rx_buffer->page_offset; 6894 #if (PAGE_SIZE < 8192) 6895 unsigned int truesize = IGB_RX_BUFSZ; 6896 #else 6897 unsigned int truesize = SKB_DATA_ALIGN(size); 6898 #endif 6899 unsigned int pull_len; 6900 6901 if (unlikely(skb_is_nonlinear(skb))) 6902 goto add_tail_frag; 6903 6904 if (unlikely(igb_test_staterr(rx_desc, E1000_RXDADV_STAT_TSIP))) { 6905 igb_ptp_rx_pktstamp(rx_ring->q_vector, va, skb); 6906 va += IGB_TS_HDR_LEN; 6907 size -= IGB_TS_HDR_LEN; 6908 } 6909 6910 if (likely(size <= IGB_RX_HDR_LEN)) { 6911 memcpy(__skb_put(skb, size), va, ALIGN(size, sizeof(long))); 6912 6913 /* page is not reserved, we can reuse buffer as-is */ 6914 if (likely(!igb_page_is_reserved(page))) 6915 return true; 6916 6917 /* this page cannot be reused so discard it */ 6918 return false; 6919 } 6920 6921 /* we need the header to contain the greater of either ETH_HLEN or 6922 * 60 bytes if the skb->len is less than 60 for skb_pad. 6923 */ 6924 pull_len = eth_get_headlen(va, IGB_RX_HDR_LEN); 6925 6926 /* align pull length to size of long to optimize memcpy performance */ 6927 memcpy(__skb_put(skb, pull_len), va, ALIGN(pull_len, sizeof(long))); 6928 6929 /* update all of the pointers */ 6930 va += pull_len; 6931 size -= pull_len; 6932 6933 add_tail_frag: 6934 skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags, page, 6935 (unsigned long)va & ~PAGE_MASK, size, truesize); 6936 6937 return igb_can_reuse_rx_page(rx_buffer, page, truesize); 6938 } 6939 6940 static struct sk_buff *igb_fetch_rx_buffer(struct igb_ring *rx_ring, 6941 union e1000_adv_rx_desc *rx_desc, 6942 struct sk_buff *skb) 6943 { 6944 unsigned int size = le16_to_cpu(rx_desc->wb.upper.length); 6945 struct igb_rx_buffer *rx_buffer; 6946 struct page *page; 6947 6948 rx_buffer = &rx_ring->rx_buffer_info[rx_ring->next_to_clean]; 6949 page = rx_buffer->page; 6950 prefetchw(page); 6951 6952 /* we are reusing so sync this buffer for CPU use */ 6953 dma_sync_single_range_for_cpu(rx_ring->dev, 6954 rx_buffer->dma, 6955 rx_buffer->page_offset, 6956 size, 6957 DMA_FROM_DEVICE); 6958 6959 if (likely(!skb)) { 6960 void *page_addr = page_address(page) + 6961 rx_buffer->page_offset; 6962 6963 /* prefetch first cache line of first page */ 6964 prefetch(page_addr); 6965 #if L1_CACHE_BYTES < 128 6966 prefetch(page_addr + L1_CACHE_BYTES); 6967 #endif 6968 6969 /* allocate a skb to store the frags */ 6970 skb = napi_alloc_skb(&rx_ring->q_vector->napi, IGB_RX_HDR_LEN); 6971 if (unlikely(!skb)) { 6972 rx_ring->rx_stats.alloc_failed++; 6973 return NULL; 6974 } 6975 6976 /* we will be copying header into skb->data in 6977 * pskb_may_pull so it is in our interest to prefetch 6978 * it now to avoid a possible cache miss 6979 */ 6980 prefetchw(skb->data); 6981 } 6982 6983 /* pull page into skb */ 6984 if (igb_add_rx_frag(rx_ring, rx_buffer, size, rx_desc, skb)) { 6985 /* hand second half of page back to the ring */ 6986 igb_reuse_rx_page(rx_ring, rx_buffer); 6987 } else { 6988 /* We are not reusing the buffer so unmap it and free 6989 * any references we are holding to it 6990 */ 6991 dma_unmap_page_attrs(rx_ring->dev, rx_buffer->dma, 6992 PAGE_SIZE, DMA_FROM_DEVICE, 6993 DMA_ATTR_SKIP_CPU_SYNC); 6994 __page_frag_cache_drain(page, rx_buffer->pagecnt_bias); 6995 } 6996 6997 /* clear contents of rx_buffer */ 6998 rx_buffer->page = NULL; 6999 7000 return skb; 7001 } 7002 7003 static inline void igb_rx_checksum(struct igb_ring *ring, 7004 union e1000_adv_rx_desc *rx_desc, 7005 struct sk_buff *skb) 7006 { 7007 skb_checksum_none_assert(skb); 7008 7009 /* Ignore Checksum bit is set */ 7010 if (igb_test_staterr(rx_desc, E1000_RXD_STAT_IXSM)) 7011 return; 7012 7013 /* Rx checksum disabled via ethtool */ 7014 if (!(ring->netdev->features & NETIF_F_RXCSUM)) 7015 return; 7016 7017 /* TCP/UDP checksum error bit is set */ 7018 if (igb_test_staterr(rx_desc, 7019 E1000_RXDEXT_STATERR_TCPE | 7020 E1000_RXDEXT_STATERR_IPE)) { 7021 /* work around errata with sctp packets where the TCPE aka 7022 * L4E bit is set incorrectly on 64 byte (60 byte w/o crc) 7023 * packets, (aka let the stack check the crc32c) 7024 */ 7025 if (!((skb->len == 60) && 7026 test_bit(IGB_RING_FLAG_RX_SCTP_CSUM, &ring->flags))) { 7027 u64_stats_update_begin(&ring->rx_syncp); 7028 ring->rx_stats.csum_err++; 7029 u64_stats_update_end(&ring->rx_syncp); 7030 } 7031 /* let the stack verify checksum errors */ 7032 return; 7033 } 7034 /* It must be a TCP or UDP packet with a valid checksum */ 7035 if (igb_test_staterr(rx_desc, E1000_RXD_STAT_TCPCS | 7036 E1000_RXD_STAT_UDPCS)) 7037 skb->ip_summed = CHECKSUM_UNNECESSARY; 7038 7039 dev_dbg(ring->dev, "cksum success: bits %08X\n", 7040 le32_to_cpu(rx_desc->wb.upper.status_error)); 7041 } 7042 7043 static inline void igb_rx_hash(struct igb_ring *ring, 7044 union e1000_adv_rx_desc *rx_desc, 7045 struct sk_buff *skb) 7046 { 7047 if (ring->netdev->features & NETIF_F_RXHASH) 7048 skb_set_hash(skb, 7049 le32_to_cpu(rx_desc->wb.lower.hi_dword.rss), 7050 PKT_HASH_TYPE_L3); 7051 } 7052 7053 /** 7054 * igb_is_non_eop - process handling of non-EOP buffers 7055 * @rx_ring: Rx ring being processed 7056 * @rx_desc: Rx descriptor for current buffer 7057 * @skb: current socket buffer containing buffer in progress 7058 * 7059 * This function updates next to clean. If the buffer is an EOP buffer 7060 * this function exits returning false, otherwise it will place the 7061 * sk_buff in the next buffer to be chained and return true indicating 7062 * that this is in fact a non-EOP buffer. 7063 **/ 7064 static bool igb_is_non_eop(struct igb_ring *rx_ring, 7065 union e1000_adv_rx_desc *rx_desc) 7066 { 7067 u32 ntc = rx_ring->next_to_clean + 1; 7068 7069 /* fetch, update, and store next to clean */ 7070 ntc = (ntc < rx_ring->count) ? ntc : 0; 7071 rx_ring->next_to_clean = ntc; 7072 7073 prefetch(IGB_RX_DESC(rx_ring, ntc)); 7074 7075 if (likely(igb_test_staterr(rx_desc, E1000_RXD_STAT_EOP))) 7076 return false; 7077 7078 return true; 7079 } 7080 7081 /** 7082 * igb_cleanup_headers - Correct corrupted or empty headers 7083 * @rx_ring: rx descriptor ring packet is being transacted on 7084 * @rx_desc: pointer to the EOP Rx descriptor 7085 * @skb: pointer to current skb being fixed 7086 * 7087 * Address the case where we are pulling data in on pages only 7088 * and as such no data is present in the skb header. 7089 * 7090 * In addition if skb is not at least 60 bytes we need to pad it so that 7091 * it is large enough to qualify as a valid Ethernet frame. 7092 * 7093 * Returns true if an error was encountered and skb was freed. 7094 **/ 7095 static bool igb_cleanup_headers(struct igb_ring *rx_ring, 7096 union e1000_adv_rx_desc *rx_desc, 7097 struct sk_buff *skb) 7098 { 7099 if (unlikely((igb_test_staterr(rx_desc, 7100 E1000_RXDEXT_ERR_FRAME_ERR_MASK)))) { 7101 struct net_device *netdev = rx_ring->netdev; 7102 if (!(netdev->features & NETIF_F_RXALL)) { 7103 dev_kfree_skb_any(skb); 7104 return true; 7105 } 7106 } 7107 7108 /* if eth_skb_pad returns an error the skb was freed */ 7109 if (eth_skb_pad(skb)) 7110 return true; 7111 7112 return false; 7113 } 7114 7115 /** 7116 * igb_process_skb_fields - Populate skb header fields from Rx descriptor 7117 * @rx_ring: rx descriptor ring packet is being transacted on 7118 * @rx_desc: pointer to the EOP Rx descriptor 7119 * @skb: pointer to current skb being populated 7120 * 7121 * This function checks the ring, descriptor, and packet information in 7122 * order to populate the hash, checksum, VLAN, timestamp, protocol, and 7123 * other fields within the skb. 7124 **/ 7125 static void igb_process_skb_fields(struct igb_ring *rx_ring, 7126 union e1000_adv_rx_desc *rx_desc, 7127 struct sk_buff *skb) 7128 { 7129 struct net_device *dev = rx_ring->netdev; 7130 7131 igb_rx_hash(rx_ring, rx_desc, skb); 7132 7133 igb_rx_checksum(rx_ring, rx_desc, skb); 7134 7135 if (igb_test_staterr(rx_desc, E1000_RXDADV_STAT_TS) && 7136 !igb_test_staterr(rx_desc, E1000_RXDADV_STAT_TSIP)) 7137 igb_ptp_rx_rgtstamp(rx_ring->q_vector, skb); 7138 7139 if ((dev->features & NETIF_F_HW_VLAN_CTAG_RX) && 7140 igb_test_staterr(rx_desc, E1000_RXD_STAT_VP)) { 7141 u16 vid; 7142 7143 if (igb_test_staterr(rx_desc, E1000_RXDEXT_STATERR_LB) && 7144 test_bit(IGB_RING_FLAG_RX_LB_VLAN_BSWAP, &rx_ring->flags)) 7145 vid = be16_to_cpu(rx_desc->wb.upper.vlan); 7146 else 7147 vid = le16_to_cpu(rx_desc->wb.upper.vlan); 7148 7149 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid); 7150 } 7151 7152 skb_record_rx_queue(skb, rx_ring->queue_index); 7153 7154 skb->protocol = eth_type_trans(skb, rx_ring->netdev); 7155 } 7156 7157 static int igb_clean_rx_irq(struct igb_q_vector *q_vector, const int budget) 7158 { 7159 struct igb_ring *rx_ring = q_vector->rx.ring; 7160 struct sk_buff *skb = rx_ring->skb; 7161 unsigned int total_bytes = 0, total_packets = 0; 7162 u16 cleaned_count = igb_desc_unused(rx_ring); 7163 7164 while (likely(total_packets < budget)) { 7165 union e1000_adv_rx_desc *rx_desc; 7166 7167 /* return some buffers to hardware, one at a time is too slow */ 7168 if (cleaned_count >= IGB_RX_BUFFER_WRITE) { 7169 igb_alloc_rx_buffers(rx_ring, cleaned_count); 7170 cleaned_count = 0; 7171 } 7172 7173 rx_desc = IGB_RX_DESC(rx_ring, rx_ring->next_to_clean); 7174 7175 if (!rx_desc->wb.upper.status_error) 7176 break; 7177 7178 /* This memory barrier is needed to keep us from reading 7179 * any other fields out of the rx_desc until we know the 7180 * descriptor has been written back 7181 */ 7182 dma_rmb(); 7183 7184 /* retrieve a buffer from the ring */ 7185 skb = igb_fetch_rx_buffer(rx_ring, rx_desc, skb); 7186 7187 /* exit if we failed to retrieve a buffer */ 7188 if (!skb) 7189 break; 7190 7191 cleaned_count++; 7192 7193 /* fetch next buffer in frame if non-eop */ 7194 if (igb_is_non_eop(rx_ring, rx_desc)) 7195 continue; 7196 7197 /* verify the packet layout is correct */ 7198 if (igb_cleanup_headers(rx_ring, rx_desc, skb)) { 7199 skb = NULL; 7200 continue; 7201 } 7202 7203 /* probably a little skewed due to removing CRC */ 7204 total_bytes += skb->len; 7205 7206 /* populate checksum, timestamp, VLAN, and protocol */ 7207 igb_process_skb_fields(rx_ring, rx_desc, skb); 7208 7209 napi_gro_receive(&q_vector->napi, skb); 7210 7211 /* reset skb pointer */ 7212 skb = NULL; 7213 7214 /* update budget accounting */ 7215 total_packets++; 7216 } 7217 7218 /* place incomplete frames back on ring for completion */ 7219 rx_ring->skb = skb; 7220 7221 u64_stats_update_begin(&rx_ring->rx_syncp); 7222 rx_ring->rx_stats.packets += total_packets; 7223 rx_ring->rx_stats.bytes += total_bytes; 7224 u64_stats_update_end(&rx_ring->rx_syncp); 7225 q_vector->rx.total_packets += total_packets; 7226 q_vector->rx.total_bytes += total_bytes; 7227 7228 if (cleaned_count) 7229 igb_alloc_rx_buffers(rx_ring, cleaned_count); 7230 7231 return total_packets; 7232 } 7233 7234 static bool igb_alloc_mapped_page(struct igb_ring *rx_ring, 7235 struct igb_rx_buffer *bi) 7236 { 7237 struct page *page = bi->page; 7238 dma_addr_t dma; 7239 7240 /* since we are recycling buffers we should seldom need to alloc */ 7241 if (likely(page)) 7242 return true; 7243 7244 /* alloc new page for storage */ 7245 page = dev_alloc_page(); 7246 if (unlikely(!page)) { 7247 rx_ring->rx_stats.alloc_failed++; 7248 return false; 7249 } 7250 7251 /* map page for use */ 7252 dma = dma_map_page_attrs(rx_ring->dev, page, 0, PAGE_SIZE, 7253 DMA_FROM_DEVICE, DMA_ATTR_SKIP_CPU_SYNC); 7254 7255 /* if mapping failed free memory back to system since 7256 * there isn't much point in holding memory we can't use 7257 */ 7258 if (dma_mapping_error(rx_ring->dev, dma)) { 7259 __free_page(page); 7260 7261 rx_ring->rx_stats.alloc_failed++; 7262 return false; 7263 } 7264 7265 bi->dma = dma; 7266 bi->page = page; 7267 bi->page_offset = 0; 7268 bi->pagecnt_bias = 1; 7269 7270 return true; 7271 } 7272 7273 /** 7274 * igb_alloc_rx_buffers - Replace used receive buffers; packet split 7275 * @adapter: address of board private structure 7276 **/ 7277 void igb_alloc_rx_buffers(struct igb_ring *rx_ring, u16 cleaned_count) 7278 { 7279 union e1000_adv_rx_desc *rx_desc; 7280 struct igb_rx_buffer *bi; 7281 u16 i = rx_ring->next_to_use; 7282 7283 /* nothing to do */ 7284 if (!cleaned_count) 7285 return; 7286 7287 rx_desc = IGB_RX_DESC(rx_ring, i); 7288 bi = &rx_ring->rx_buffer_info[i]; 7289 i -= rx_ring->count; 7290 7291 do { 7292 if (!igb_alloc_mapped_page(rx_ring, bi)) 7293 break; 7294 7295 /* sync the buffer for use by the device */ 7296 dma_sync_single_range_for_device(rx_ring->dev, bi->dma, 7297 bi->page_offset, 7298 IGB_RX_BUFSZ, 7299 DMA_FROM_DEVICE); 7300 7301 /* Refresh the desc even if buffer_addrs didn't change 7302 * because each write-back erases this info. 7303 */ 7304 rx_desc->read.pkt_addr = cpu_to_le64(bi->dma + bi->page_offset); 7305 7306 rx_desc++; 7307 bi++; 7308 i++; 7309 if (unlikely(!i)) { 7310 rx_desc = IGB_RX_DESC(rx_ring, 0); 7311 bi = rx_ring->rx_buffer_info; 7312 i -= rx_ring->count; 7313 } 7314 7315 /* clear the status bits for the next_to_use descriptor */ 7316 rx_desc->wb.upper.status_error = 0; 7317 7318 cleaned_count--; 7319 } while (cleaned_count); 7320 7321 i += rx_ring->count; 7322 7323 if (rx_ring->next_to_use != i) { 7324 /* record the next descriptor to use */ 7325 rx_ring->next_to_use = i; 7326 7327 /* update next to alloc since we have filled the ring */ 7328 rx_ring->next_to_alloc = i; 7329 7330 /* Force memory writes to complete before letting h/w 7331 * know there are new descriptors to fetch. (Only 7332 * applicable for weak-ordered memory model archs, 7333 * such as IA-64). 7334 */ 7335 wmb(); 7336 writel(i, rx_ring->tail); 7337 } 7338 } 7339 7340 /** 7341 * igb_mii_ioctl - 7342 * @netdev: 7343 * @ifreq: 7344 * @cmd: 7345 **/ 7346 static int igb_mii_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd) 7347 { 7348 struct igb_adapter *adapter = netdev_priv(netdev); 7349 struct mii_ioctl_data *data = if_mii(ifr); 7350 7351 if (adapter->hw.phy.media_type != e1000_media_type_copper) 7352 return -EOPNOTSUPP; 7353 7354 switch (cmd) { 7355 case SIOCGMIIPHY: 7356 data->phy_id = adapter->hw.phy.addr; 7357 break; 7358 case SIOCGMIIREG: 7359 if (igb_read_phy_reg(&adapter->hw, data->reg_num & 0x1F, 7360 &data->val_out)) 7361 return -EIO; 7362 break; 7363 case SIOCSMIIREG: 7364 default: 7365 return -EOPNOTSUPP; 7366 } 7367 return 0; 7368 } 7369 7370 /** 7371 * igb_ioctl - 7372 * @netdev: 7373 * @ifreq: 7374 * @cmd: 7375 **/ 7376 static int igb_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd) 7377 { 7378 switch (cmd) { 7379 case SIOCGMIIPHY: 7380 case SIOCGMIIREG: 7381 case SIOCSMIIREG: 7382 return igb_mii_ioctl(netdev, ifr, cmd); 7383 case SIOCGHWTSTAMP: 7384 return igb_ptp_get_ts_config(netdev, ifr); 7385 case SIOCSHWTSTAMP: 7386 return igb_ptp_set_ts_config(netdev, ifr); 7387 default: 7388 return -EOPNOTSUPP; 7389 } 7390 } 7391 7392 void igb_read_pci_cfg(struct e1000_hw *hw, u32 reg, u16 *value) 7393 { 7394 struct igb_adapter *adapter = hw->back; 7395 7396 pci_read_config_word(adapter->pdev, reg, value); 7397 } 7398 7399 void igb_write_pci_cfg(struct e1000_hw *hw, u32 reg, u16 *value) 7400 { 7401 struct igb_adapter *adapter = hw->back; 7402 7403 pci_write_config_word(adapter->pdev, reg, *value); 7404 } 7405 7406 s32 igb_read_pcie_cap_reg(struct e1000_hw *hw, u32 reg, u16 *value) 7407 { 7408 struct igb_adapter *adapter = hw->back; 7409 7410 if (pcie_capability_read_word(adapter->pdev, reg, value)) 7411 return -E1000_ERR_CONFIG; 7412 7413 return 0; 7414 } 7415 7416 s32 igb_write_pcie_cap_reg(struct e1000_hw *hw, u32 reg, u16 *value) 7417 { 7418 struct igb_adapter *adapter = hw->back; 7419 7420 if (pcie_capability_write_word(adapter->pdev, reg, *value)) 7421 return -E1000_ERR_CONFIG; 7422 7423 return 0; 7424 } 7425 7426 static void igb_vlan_mode(struct net_device *netdev, netdev_features_t features) 7427 { 7428 struct igb_adapter *adapter = netdev_priv(netdev); 7429 struct e1000_hw *hw = &adapter->hw; 7430 u32 ctrl, rctl; 7431 bool enable = !!(features & NETIF_F_HW_VLAN_CTAG_RX); 7432 7433 if (enable) { 7434 /* enable VLAN tag insert/strip */ 7435 ctrl = rd32(E1000_CTRL); 7436 ctrl |= E1000_CTRL_VME; 7437 wr32(E1000_CTRL, ctrl); 7438 7439 /* Disable CFI check */ 7440 rctl = rd32(E1000_RCTL); 7441 rctl &= ~E1000_RCTL_CFIEN; 7442 wr32(E1000_RCTL, rctl); 7443 } else { 7444 /* disable VLAN tag insert/strip */ 7445 ctrl = rd32(E1000_CTRL); 7446 ctrl &= ~E1000_CTRL_VME; 7447 wr32(E1000_CTRL, ctrl); 7448 } 7449 7450 igb_set_vf_vlan_strip(adapter, adapter->vfs_allocated_count, enable); 7451 } 7452 7453 static int igb_vlan_rx_add_vid(struct net_device *netdev, 7454 __be16 proto, u16 vid) 7455 { 7456 struct igb_adapter *adapter = netdev_priv(netdev); 7457 struct e1000_hw *hw = &adapter->hw; 7458 int pf_id = adapter->vfs_allocated_count; 7459 7460 /* add the filter since PF can receive vlans w/o entry in vlvf */ 7461 if (!vid || !(adapter->flags & IGB_FLAG_VLAN_PROMISC)) 7462 igb_vfta_set(hw, vid, pf_id, true, !!vid); 7463 7464 set_bit(vid, adapter->active_vlans); 7465 7466 return 0; 7467 } 7468 7469 static int igb_vlan_rx_kill_vid(struct net_device *netdev, 7470 __be16 proto, u16 vid) 7471 { 7472 struct igb_adapter *adapter = netdev_priv(netdev); 7473 int pf_id = adapter->vfs_allocated_count; 7474 struct e1000_hw *hw = &adapter->hw; 7475 7476 /* remove VID from filter table */ 7477 if (vid && !(adapter->flags & IGB_FLAG_VLAN_PROMISC)) 7478 igb_vfta_set(hw, vid, pf_id, false, true); 7479 7480 clear_bit(vid, adapter->active_vlans); 7481 7482 return 0; 7483 } 7484 7485 static void igb_restore_vlan(struct igb_adapter *adapter) 7486 { 7487 u16 vid = 1; 7488 7489 igb_vlan_mode(adapter->netdev, adapter->netdev->features); 7490 igb_vlan_rx_add_vid(adapter->netdev, htons(ETH_P_8021Q), 0); 7491 7492 for_each_set_bit_from(vid, adapter->active_vlans, VLAN_N_VID) 7493 igb_vlan_rx_add_vid(adapter->netdev, htons(ETH_P_8021Q), vid); 7494 } 7495 7496 int igb_set_spd_dplx(struct igb_adapter *adapter, u32 spd, u8 dplx) 7497 { 7498 struct pci_dev *pdev = adapter->pdev; 7499 struct e1000_mac_info *mac = &adapter->hw.mac; 7500 7501 mac->autoneg = 0; 7502 7503 /* Make sure dplx is at most 1 bit and lsb of speed is not set 7504 * for the switch() below to work 7505 */ 7506 if ((spd & 1) || (dplx & ~1)) 7507 goto err_inval; 7508 7509 /* Fiber NIC's only allow 1000 gbps Full duplex 7510 * and 100Mbps Full duplex for 100baseFx sfp 7511 */ 7512 if (adapter->hw.phy.media_type == e1000_media_type_internal_serdes) { 7513 switch (spd + dplx) { 7514 case SPEED_10 + DUPLEX_HALF: 7515 case SPEED_10 + DUPLEX_FULL: 7516 case SPEED_100 + DUPLEX_HALF: 7517 goto err_inval; 7518 default: 7519 break; 7520 } 7521 } 7522 7523 switch (spd + dplx) { 7524 case SPEED_10 + DUPLEX_HALF: 7525 mac->forced_speed_duplex = ADVERTISE_10_HALF; 7526 break; 7527 case SPEED_10 + DUPLEX_FULL: 7528 mac->forced_speed_duplex = ADVERTISE_10_FULL; 7529 break; 7530 case SPEED_100 + DUPLEX_HALF: 7531 mac->forced_speed_duplex = ADVERTISE_100_HALF; 7532 break; 7533 case SPEED_100 + DUPLEX_FULL: 7534 mac->forced_speed_duplex = ADVERTISE_100_FULL; 7535 break; 7536 case SPEED_1000 + DUPLEX_FULL: 7537 mac->autoneg = 1; 7538 adapter->hw.phy.autoneg_advertised = ADVERTISE_1000_FULL; 7539 break; 7540 case SPEED_1000 + DUPLEX_HALF: /* not supported */ 7541 default: 7542 goto err_inval; 7543 } 7544 7545 /* clear MDI, MDI(-X) override is only allowed when autoneg enabled */ 7546 adapter->hw.phy.mdix = AUTO_ALL_MODES; 7547 7548 return 0; 7549 7550 err_inval: 7551 dev_err(&pdev->dev, "Unsupported Speed/Duplex configuration\n"); 7552 return -EINVAL; 7553 } 7554 7555 static int __igb_shutdown(struct pci_dev *pdev, bool *enable_wake, 7556 bool runtime) 7557 { 7558 struct net_device *netdev = pci_get_drvdata(pdev); 7559 struct igb_adapter *adapter = netdev_priv(netdev); 7560 struct e1000_hw *hw = &adapter->hw; 7561 u32 ctrl, rctl, status; 7562 u32 wufc = runtime ? E1000_WUFC_LNKC : adapter->wol; 7563 #ifdef CONFIG_PM 7564 int retval = 0; 7565 #endif 7566 7567 rtnl_lock(); 7568 netif_device_detach(netdev); 7569 7570 if (netif_running(netdev)) 7571 __igb_close(netdev, true); 7572 7573 igb_ptp_suspend(adapter); 7574 7575 igb_clear_interrupt_scheme(adapter); 7576 rtnl_unlock(); 7577 7578 #ifdef CONFIG_PM 7579 retval = pci_save_state(pdev); 7580 if (retval) 7581 return retval; 7582 #endif 7583 7584 status = rd32(E1000_STATUS); 7585 if (status & E1000_STATUS_LU) 7586 wufc &= ~E1000_WUFC_LNKC; 7587 7588 if (wufc) { 7589 igb_setup_rctl(adapter); 7590 igb_set_rx_mode(netdev); 7591 7592 /* turn on all-multi mode if wake on multicast is enabled */ 7593 if (wufc & E1000_WUFC_MC) { 7594 rctl = rd32(E1000_RCTL); 7595 rctl |= E1000_RCTL_MPE; 7596 wr32(E1000_RCTL, rctl); 7597 } 7598 7599 ctrl = rd32(E1000_CTRL); 7600 /* advertise wake from D3Cold */ 7601 #define E1000_CTRL_ADVD3WUC 0x00100000 7602 /* phy power management enable */ 7603 #define E1000_CTRL_EN_PHY_PWR_MGMT 0x00200000 7604 ctrl |= E1000_CTRL_ADVD3WUC; 7605 wr32(E1000_CTRL, ctrl); 7606 7607 /* Allow time for pending master requests to run */ 7608 igb_disable_pcie_master(hw); 7609 7610 wr32(E1000_WUC, E1000_WUC_PME_EN); 7611 wr32(E1000_WUFC, wufc); 7612 } else { 7613 wr32(E1000_WUC, 0); 7614 wr32(E1000_WUFC, 0); 7615 } 7616 7617 *enable_wake = wufc || adapter->en_mng_pt; 7618 if (!*enable_wake) 7619 igb_power_down_link(adapter); 7620 else 7621 igb_power_up_link(adapter); 7622 7623 /* Release control of h/w to f/w. If f/w is AMT enabled, this 7624 * would have already happened in close and is redundant. 7625 */ 7626 igb_release_hw_control(adapter); 7627 7628 pci_disable_device(pdev); 7629 7630 return 0; 7631 } 7632 7633 #ifdef CONFIG_PM 7634 #ifdef CONFIG_PM_SLEEP 7635 static int igb_suspend(struct device *dev) 7636 { 7637 int retval; 7638 bool wake; 7639 struct pci_dev *pdev = to_pci_dev(dev); 7640 7641 retval = __igb_shutdown(pdev, &wake, 0); 7642 if (retval) 7643 return retval; 7644 7645 if (wake) { 7646 pci_prepare_to_sleep(pdev); 7647 } else { 7648 pci_wake_from_d3(pdev, false); 7649 pci_set_power_state(pdev, PCI_D3hot); 7650 } 7651 7652 return 0; 7653 } 7654 #endif /* CONFIG_PM_SLEEP */ 7655 7656 static int igb_resume(struct device *dev) 7657 { 7658 struct pci_dev *pdev = to_pci_dev(dev); 7659 struct net_device *netdev = pci_get_drvdata(pdev); 7660 struct igb_adapter *adapter = netdev_priv(netdev); 7661 struct e1000_hw *hw = &adapter->hw; 7662 u32 err; 7663 7664 pci_set_power_state(pdev, PCI_D0); 7665 pci_restore_state(pdev); 7666 pci_save_state(pdev); 7667 7668 if (!pci_device_is_present(pdev)) 7669 return -ENODEV; 7670 err = pci_enable_device_mem(pdev); 7671 if (err) { 7672 dev_err(&pdev->dev, 7673 "igb: Cannot enable PCI device from suspend\n"); 7674 return err; 7675 } 7676 pci_set_master(pdev); 7677 7678 pci_enable_wake(pdev, PCI_D3hot, 0); 7679 pci_enable_wake(pdev, PCI_D3cold, 0); 7680 7681 if (igb_init_interrupt_scheme(adapter, true)) { 7682 dev_err(&pdev->dev, "Unable to allocate memory for queues\n"); 7683 return -ENOMEM; 7684 } 7685 7686 igb_reset(adapter); 7687 7688 /* let the f/w know that the h/w is now under the control of the 7689 * driver. 7690 */ 7691 igb_get_hw_control(adapter); 7692 7693 wr32(E1000_WUS, ~0); 7694 7695 rtnl_lock(); 7696 if (!err && netif_running(netdev)) 7697 err = __igb_open(netdev, true); 7698 7699 if (!err) 7700 netif_device_attach(netdev); 7701 rtnl_unlock(); 7702 7703 return err; 7704 } 7705 7706 static int igb_runtime_idle(struct device *dev) 7707 { 7708 struct pci_dev *pdev = to_pci_dev(dev); 7709 struct net_device *netdev = pci_get_drvdata(pdev); 7710 struct igb_adapter *adapter = netdev_priv(netdev); 7711 7712 if (!igb_has_link(adapter)) 7713 pm_schedule_suspend(dev, MSEC_PER_SEC * 5); 7714 7715 return -EBUSY; 7716 } 7717 7718 static int igb_runtime_suspend(struct device *dev) 7719 { 7720 struct pci_dev *pdev = to_pci_dev(dev); 7721 int retval; 7722 bool wake; 7723 7724 retval = __igb_shutdown(pdev, &wake, 1); 7725 if (retval) 7726 return retval; 7727 7728 if (wake) { 7729 pci_prepare_to_sleep(pdev); 7730 } else { 7731 pci_wake_from_d3(pdev, false); 7732 pci_set_power_state(pdev, PCI_D3hot); 7733 } 7734 7735 return 0; 7736 } 7737 7738 static int igb_runtime_resume(struct device *dev) 7739 { 7740 return igb_resume(dev); 7741 } 7742 #endif /* CONFIG_PM */ 7743 7744 static void igb_shutdown(struct pci_dev *pdev) 7745 { 7746 bool wake; 7747 7748 __igb_shutdown(pdev, &wake, 0); 7749 7750 if (system_state == SYSTEM_POWER_OFF) { 7751 pci_wake_from_d3(pdev, wake); 7752 pci_set_power_state(pdev, PCI_D3hot); 7753 } 7754 } 7755 7756 #ifdef CONFIG_PCI_IOV 7757 static int igb_sriov_reinit(struct pci_dev *dev) 7758 { 7759 struct net_device *netdev = pci_get_drvdata(dev); 7760 struct igb_adapter *adapter = netdev_priv(netdev); 7761 struct pci_dev *pdev = adapter->pdev; 7762 7763 rtnl_lock(); 7764 7765 if (netif_running(netdev)) 7766 igb_close(netdev); 7767 else 7768 igb_reset(adapter); 7769 7770 igb_clear_interrupt_scheme(adapter); 7771 7772 igb_init_queue_configuration(adapter); 7773 7774 if (igb_init_interrupt_scheme(adapter, true)) { 7775 rtnl_unlock(); 7776 dev_err(&pdev->dev, "Unable to allocate memory for queues\n"); 7777 return -ENOMEM; 7778 } 7779 7780 if (netif_running(netdev)) 7781 igb_open(netdev); 7782 7783 rtnl_unlock(); 7784 7785 return 0; 7786 } 7787 7788 static int igb_pci_disable_sriov(struct pci_dev *dev) 7789 { 7790 int err = igb_disable_sriov(dev); 7791 7792 if (!err) 7793 err = igb_sriov_reinit(dev); 7794 7795 return err; 7796 } 7797 7798 static int igb_pci_enable_sriov(struct pci_dev *dev, int num_vfs) 7799 { 7800 int err = igb_enable_sriov(dev, num_vfs); 7801 7802 if (err) 7803 goto out; 7804 7805 err = igb_sriov_reinit(dev); 7806 if (!err) 7807 return num_vfs; 7808 7809 out: 7810 return err; 7811 } 7812 7813 #endif 7814 static int igb_pci_sriov_configure(struct pci_dev *dev, int num_vfs) 7815 { 7816 #ifdef CONFIG_PCI_IOV 7817 if (num_vfs == 0) 7818 return igb_pci_disable_sriov(dev); 7819 else 7820 return igb_pci_enable_sriov(dev, num_vfs); 7821 #endif 7822 return 0; 7823 } 7824 7825 #ifdef CONFIG_NET_POLL_CONTROLLER 7826 /* Polling 'interrupt' - used by things like netconsole to send skbs 7827 * without having to re-enable interrupts. It's not called while 7828 * the interrupt routine is executing. 7829 */ 7830 static void igb_netpoll(struct net_device *netdev) 7831 { 7832 struct igb_adapter *adapter = netdev_priv(netdev); 7833 struct e1000_hw *hw = &adapter->hw; 7834 struct igb_q_vector *q_vector; 7835 int i; 7836 7837 for (i = 0; i < adapter->num_q_vectors; i++) { 7838 q_vector = adapter->q_vector[i]; 7839 if (adapter->flags & IGB_FLAG_HAS_MSIX) 7840 wr32(E1000_EIMC, q_vector->eims_value); 7841 else 7842 igb_irq_disable(adapter); 7843 napi_schedule(&q_vector->napi); 7844 } 7845 } 7846 #endif /* CONFIG_NET_POLL_CONTROLLER */ 7847 7848 /** 7849 * igb_io_error_detected - called when PCI error is detected 7850 * @pdev: Pointer to PCI device 7851 * @state: The current pci connection state 7852 * 7853 * This function is called after a PCI bus error affecting 7854 * this device has been detected. 7855 **/ 7856 static pci_ers_result_t igb_io_error_detected(struct pci_dev *pdev, 7857 pci_channel_state_t state) 7858 { 7859 struct net_device *netdev = pci_get_drvdata(pdev); 7860 struct igb_adapter *adapter = netdev_priv(netdev); 7861 7862 netif_device_detach(netdev); 7863 7864 if (state == pci_channel_io_perm_failure) 7865 return PCI_ERS_RESULT_DISCONNECT; 7866 7867 if (netif_running(netdev)) 7868 igb_down(adapter); 7869 pci_disable_device(pdev); 7870 7871 /* Request a slot slot reset. */ 7872 return PCI_ERS_RESULT_NEED_RESET; 7873 } 7874 7875 /** 7876 * igb_io_slot_reset - called after the pci bus has been reset. 7877 * @pdev: Pointer to PCI device 7878 * 7879 * Restart the card from scratch, as if from a cold-boot. Implementation 7880 * resembles the first-half of the igb_resume routine. 7881 **/ 7882 static pci_ers_result_t igb_io_slot_reset(struct pci_dev *pdev) 7883 { 7884 struct net_device *netdev = pci_get_drvdata(pdev); 7885 struct igb_adapter *adapter = netdev_priv(netdev); 7886 struct e1000_hw *hw = &adapter->hw; 7887 pci_ers_result_t result; 7888 int err; 7889 7890 if (pci_enable_device_mem(pdev)) { 7891 dev_err(&pdev->dev, 7892 "Cannot re-enable PCI device after reset.\n"); 7893 result = PCI_ERS_RESULT_DISCONNECT; 7894 } else { 7895 pci_set_master(pdev); 7896 pci_restore_state(pdev); 7897 pci_save_state(pdev); 7898 7899 pci_enable_wake(pdev, PCI_D3hot, 0); 7900 pci_enable_wake(pdev, PCI_D3cold, 0); 7901 7902 /* In case of PCI error, adapter lose its HW address 7903 * so we should re-assign it here. 7904 */ 7905 hw->hw_addr = adapter->io_addr; 7906 7907 igb_reset(adapter); 7908 wr32(E1000_WUS, ~0); 7909 result = PCI_ERS_RESULT_RECOVERED; 7910 } 7911 7912 err = pci_cleanup_aer_uncorrect_error_status(pdev); 7913 if (err) { 7914 dev_err(&pdev->dev, 7915 "pci_cleanup_aer_uncorrect_error_status failed 0x%0x\n", 7916 err); 7917 /* non-fatal, continue */ 7918 } 7919 7920 return result; 7921 } 7922 7923 /** 7924 * igb_io_resume - called when traffic can start flowing again. 7925 * @pdev: Pointer to PCI device 7926 * 7927 * This callback is called when the error recovery driver tells us that 7928 * its OK to resume normal operation. Implementation resembles the 7929 * second-half of the igb_resume routine. 7930 */ 7931 static void igb_io_resume(struct pci_dev *pdev) 7932 { 7933 struct net_device *netdev = pci_get_drvdata(pdev); 7934 struct igb_adapter *adapter = netdev_priv(netdev); 7935 7936 if (netif_running(netdev)) { 7937 if (igb_up(adapter)) { 7938 dev_err(&pdev->dev, "igb_up failed after reset\n"); 7939 return; 7940 } 7941 } 7942 7943 netif_device_attach(netdev); 7944 7945 /* let the f/w know that the h/w is now under the control of the 7946 * driver. 7947 */ 7948 igb_get_hw_control(adapter); 7949 } 7950 7951 static void igb_rar_set_qsel(struct igb_adapter *adapter, u8 *addr, u32 index, 7952 u8 qsel) 7953 { 7954 struct e1000_hw *hw = &adapter->hw; 7955 u32 rar_low, rar_high; 7956 7957 /* HW expects these to be in network order when they are plugged 7958 * into the registers which are little endian. In order to guarantee 7959 * that ordering we need to do an leXX_to_cpup here in order to be 7960 * ready for the byteswap that occurs with writel 7961 */ 7962 rar_low = le32_to_cpup((__le32 *)(addr)); 7963 rar_high = le16_to_cpup((__le16 *)(addr + 4)); 7964 7965 /* Indicate to hardware the Address is Valid. */ 7966 rar_high |= E1000_RAH_AV; 7967 7968 if (hw->mac.type == e1000_82575) 7969 rar_high |= E1000_RAH_POOL_1 * qsel; 7970 else 7971 rar_high |= E1000_RAH_POOL_1 << qsel; 7972 7973 wr32(E1000_RAL(index), rar_low); 7974 wrfl(); 7975 wr32(E1000_RAH(index), rar_high); 7976 wrfl(); 7977 } 7978 7979 static int igb_set_vf_mac(struct igb_adapter *adapter, 7980 int vf, unsigned char *mac_addr) 7981 { 7982 struct e1000_hw *hw = &adapter->hw; 7983 /* VF MAC addresses start at end of receive addresses and moves 7984 * towards the first, as a result a collision should not be possible 7985 */ 7986 int rar_entry = hw->mac.rar_entry_count - (vf + 1); 7987 7988 memcpy(adapter->vf_data[vf].vf_mac_addresses, mac_addr, ETH_ALEN); 7989 7990 igb_rar_set_qsel(adapter, mac_addr, rar_entry, vf); 7991 7992 return 0; 7993 } 7994 7995 static int igb_ndo_set_vf_mac(struct net_device *netdev, int vf, u8 *mac) 7996 { 7997 struct igb_adapter *adapter = netdev_priv(netdev); 7998 if (!is_valid_ether_addr(mac) || (vf >= adapter->vfs_allocated_count)) 7999 return -EINVAL; 8000 adapter->vf_data[vf].flags |= IGB_VF_FLAG_PF_SET_MAC; 8001 dev_info(&adapter->pdev->dev, "setting MAC %pM on VF %d\n", mac, vf); 8002 dev_info(&adapter->pdev->dev, 8003 "Reload the VF driver to make this change effective."); 8004 if (test_bit(__IGB_DOWN, &adapter->state)) { 8005 dev_warn(&adapter->pdev->dev, 8006 "The VF MAC address has been set, but the PF device is not up.\n"); 8007 dev_warn(&adapter->pdev->dev, 8008 "Bring the PF device up before attempting to use the VF device.\n"); 8009 } 8010 return igb_set_vf_mac(adapter, vf, mac); 8011 } 8012 8013 static int igb_link_mbps(int internal_link_speed) 8014 { 8015 switch (internal_link_speed) { 8016 case SPEED_100: 8017 return 100; 8018 case SPEED_1000: 8019 return 1000; 8020 default: 8021 return 0; 8022 } 8023 } 8024 8025 static void igb_set_vf_rate_limit(struct e1000_hw *hw, int vf, int tx_rate, 8026 int link_speed) 8027 { 8028 int rf_dec, rf_int; 8029 u32 bcnrc_val; 8030 8031 if (tx_rate != 0) { 8032 /* Calculate the rate factor values to set */ 8033 rf_int = link_speed / tx_rate; 8034 rf_dec = (link_speed - (rf_int * tx_rate)); 8035 rf_dec = (rf_dec * BIT(E1000_RTTBCNRC_RF_INT_SHIFT)) / 8036 tx_rate; 8037 8038 bcnrc_val = E1000_RTTBCNRC_RS_ENA; 8039 bcnrc_val |= ((rf_int << E1000_RTTBCNRC_RF_INT_SHIFT) & 8040 E1000_RTTBCNRC_RF_INT_MASK); 8041 bcnrc_val |= (rf_dec & E1000_RTTBCNRC_RF_DEC_MASK); 8042 } else { 8043 bcnrc_val = 0; 8044 } 8045 8046 wr32(E1000_RTTDQSEL, vf); /* vf X uses queue X */ 8047 /* Set global transmit compensation time to the MMW_SIZE in RTTBCNRM 8048 * register. MMW_SIZE=0x014 if 9728-byte jumbo is supported. 8049 */ 8050 wr32(E1000_RTTBCNRM, 0x14); 8051 wr32(E1000_RTTBCNRC, bcnrc_val); 8052 } 8053 8054 static void igb_check_vf_rate_limit(struct igb_adapter *adapter) 8055 { 8056 int actual_link_speed, i; 8057 bool reset_rate = false; 8058 8059 /* VF TX rate limit was not set or not supported */ 8060 if ((adapter->vf_rate_link_speed == 0) || 8061 (adapter->hw.mac.type != e1000_82576)) 8062 return; 8063 8064 actual_link_speed = igb_link_mbps(adapter->link_speed); 8065 if (actual_link_speed != adapter->vf_rate_link_speed) { 8066 reset_rate = true; 8067 adapter->vf_rate_link_speed = 0; 8068 dev_info(&adapter->pdev->dev, 8069 "Link speed has been changed. VF Transmit rate is disabled\n"); 8070 } 8071 8072 for (i = 0; i < adapter->vfs_allocated_count; i++) { 8073 if (reset_rate) 8074 adapter->vf_data[i].tx_rate = 0; 8075 8076 igb_set_vf_rate_limit(&adapter->hw, i, 8077 adapter->vf_data[i].tx_rate, 8078 actual_link_speed); 8079 } 8080 } 8081 8082 static int igb_ndo_set_vf_bw(struct net_device *netdev, int vf, 8083 int min_tx_rate, int max_tx_rate) 8084 { 8085 struct igb_adapter *adapter = netdev_priv(netdev); 8086 struct e1000_hw *hw = &adapter->hw; 8087 int actual_link_speed; 8088 8089 if (hw->mac.type != e1000_82576) 8090 return -EOPNOTSUPP; 8091 8092 if (min_tx_rate) 8093 return -EINVAL; 8094 8095 actual_link_speed = igb_link_mbps(adapter->link_speed); 8096 if ((vf >= adapter->vfs_allocated_count) || 8097 (!(rd32(E1000_STATUS) & E1000_STATUS_LU)) || 8098 (max_tx_rate < 0) || 8099 (max_tx_rate > actual_link_speed)) 8100 return -EINVAL; 8101 8102 adapter->vf_rate_link_speed = actual_link_speed; 8103 adapter->vf_data[vf].tx_rate = (u16)max_tx_rate; 8104 igb_set_vf_rate_limit(hw, vf, max_tx_rate, actual_link_speed); 8105 8106 return 0; 8107 } 8108 8109 static int igb_ndo_set_vf_spoofchk(struct net_device *netdev, int vf, 8110 bool setting) 8111 { 8112 struct igb_adapter *adapter = netdev_priv(netdev); 8113 struct e1000_hw *hw = &adapter->hw; 8114 u32 reg_val, reg_offset; 8115 8116 if (!adapter->vfs_allocated_count) 8117 return -EOPNOTSUPP; 8118 8119 if (vf >= adapter->vfs_allocated_count) 8120 return -EINVAL; 8121 8122 reg_offset = (hw->mac.type == e1000_82576) ? E1000_DTXSWC : E1000_TXSWC; 8123 reg_val = rd32(reg_offset); 8124 if (setting) 8125 reg_val |= (BIT(vf) | 8126 BIT(vf + E1000_DTXSWC_VLAN_SPOOF_SHIFT)); 8127 else 8128 reg_val &= ~(BIT(vf) | 8129 BIT(vf + E1000_DTXSWC_VLAN_SPOOF_SHIFT)); 8130 wr32(reg_offset, reg_val); 8131 8132 adapter->vf_data[vf].spoofchk_enabled = setting; 8133 return 0; 8134 } 8135 8136 static int igb_ndo_get_vf_config(struct net_device *netdev, 8137 int vf, struct ifla_vf_info *ivi) 8138 { 8139 struct igb_adapter *adapter = netdev_priv(netdev); 8140 if (vf >= adapter->vfs_allocated_count) 8141 return -EINVAL; 8142 ivi->vf = vf; 8143 memcpy(&ivi->mac, adapter->vf_data[vf].vf_mac_addresses, ETH_ALEN); 8144 ivi->max_tx_rate = adapter->vf_data[vf].tx_rate; 8145 ivi->min_tx_rate = 0; 8146 ivi->vlan = adapter->vf_data[vf].pf_vlan; 8147 ivi->qos = adapter->vf_data[vf].pf_qos; 8148 ivi->spoofchk = adapter->vf_data[vf].spoofchk_enabled; 8149 return 0; 8150 } 8151 8152 static void igb_vmm_control(struct igb_adapter *adapter) 8153 { 8154 struct e1000_hw *hw = &adapter->hw; 8155 u32 reg; 8156 8157 switch (hw->mac.type) { 8158 case e1000_82575: 8159 case e1000_i210: 8160 case e1000_i211: 8161 case e1000_i354: 8162 default: 8163 /* replication is not supported for 82575 */ 8164 return; 8165 case e1000_82576: 8166 /* notify HW that the MAC is adding vlan tags */ 8167 reg = rd32(E1000_DTXCTL); 8168 reg |= E1000_DTXCTL_VLAN_ADDED; 8169 wr32(E1000_DTXCTL, reg); 8170 /* Fall through */ 8171 case e1000_82580: 8172 /* enable replication vlan tag stripping */ 8173 reg = rd32(E1000_RPLOLR); 8174 reg |= E1000_RPLOLR_STRVLAN; 8175 wr32(E1000_RPLOLR, reg); 8176 /* Fall through */ 8177 case e1000_i350: 8178 /* none of the above registers are supported by i350 */ 8179 break; 8180 } 8181 8182 if (adapter->vfs_allocated_count) { 8183 igb_vmdq_set_loopback_pf(hw, true); 8184 igb_vmdq_set_replication_pf(hw, true); 8185 igb_vmdq_set_anti_spoofing_pf(hw, true, 8186 adapter->vfs_allocated_count); 8187 } else { 8188 igb_vmdq_set_loopback_pf(hw, false); 8189 igb_vmdq_set_replication_pf(hw, false); 8190 } 8191 } 8192 8193 static void igb_init_dmac(struct igb_adapter *adapter, u32 pba) 8194 { 8195 struct e1000_hw *hw = &adapter->hw; 8196 u32 dmac_thr; 8197 u16 hwm; 8198 8199 if (hw->mac.type > e1000_82580) { 8200 if (adapter->flags & IGB_FLAG_DMAC) { 8201 u32 reg; 8202 8203 /* force threshold to 0. */ 8204 wr32(E1000_DMCTXTH, 0); 8205 8206 /* DMA Coalescing high water mark needs to be greater 8207 * than the Rx threshold. Set hwm to PBA - max frame 8208 * size in 16B units, capping it at PBA - 6KB. 8209 */ 8210 hwm = 64 * (pba - 6); 8211 reg = rd32(E1000_FCRTC); 8212 reg &= ~E1000_FCRTC_RTH_COAL_MASK; 8213 reg |= ((hwm << E1000_FCRTC_RTH_COAL_SHIFT) 8214 & E1000_FCRTC_RTH_COAL_MASK); 8215 wr32(E1000_FCRTC, reg); 8216 8217 /* Set the DMA Coalescing Rx threshold to PBA - 2 * max 8218 * frame size, capping it at PBA - 10KB. 8219 */ 8220 dmac_thr = pba - 10; 8221 reg = rd32(E1000_DMACR); 8222 reg &= ~E1000_DMACR_DMACTHR_MASK; 8223 reg |= ((dmac_thr << E1000_DMACR_DMACTHR_SHIFT) 8224 & E1000_DMACR_DMACTHR_MASK); 8225 8226 /* transition to L0x or L1 if available..*/ 8227 reg |= (E1000_DMACR_DMAC_EN | E1000_DMACR_DMAC_LX_MASK); 8228 8229 /* watchdog timer= +-1000 usec in 32usec intervals */ 8230 reg |= (1000 >> 5); 8231 8232 /* Disable BMC-to-OS Watchdog Enable */ 8233 if (hw->mac.type != e1000_i354) 8234 reg &= ~E1000_DMACR_DC_BMC2OSW_EN; 8235 8236 wr32(E1000_DMACR, reg); 8237 8238 /* no lower threshold to disable 8239 * coalescing(smart fifb)-UTRESH=0 8240 */ 8241 wr32(E1000_DMCRTRH, 0); 8242 8243 reg = (IGB_DMCTLX_DCFLUSH_DIS | 0x4); 8244 8245 wr32(E1000_DMCTLX, reg); 8246 8247 /* free space in tx packet buffer to wake from 8248 * DMA coal 8249 */ 8250 wr32(E1000_DMCTXTH, (IGB_MIN_TXPBSIZE - 8251 (IGB_TX_BUF_4096 + adapter->max_frame_size)) >> 6); 8252 8253 /* make low power state decision controlled 8254 * by DMA coal 8255 */ 8256 reg = rd32(E1000_PCIEMISC); 8257 reg &= ~E1000_PCIEMISC_LX_DECISION; 8258 wr32(E1000_PCIEMISC, reg); 8259 } /* endif adapter->dmac is not disabled */ 8260 } else if (hw->mac.type == e1000_82580) { 8261 u32 reg = rd32(E1000_PCIEMISC); 8262 8263 wr32(E1000_PCIEMISC, reg & ~E1000_PCIEMISC_LX_DECISION); 8264 wr32(E1000_DMACR, 0); 8265 } 8266 } 8267 8268 /** 8269 * igb_read_i2c_byte - Reads 8 bit word over I2C 8270 * @hw: pointer to hardware structure 8271 * @byte_offset: byte offset to read 8272 * @dev_addr: device address 8273 * @data: value read 8274 * 8275 * Performs byte read operation over I2C interface at 8276 * a specified device address. 8277 **/ 8278 s32 igb_read_i2c_byte(struct e1000_hw *hw, u8 byte_offset, 8279 u8 dev_addr, u8 *data) 8280 { 8281 struct igb_adapter *adapter = container_of(hw, struct igb_adapter, hw); 8282 struct i2c_client *this_client = adapter->i2c_client; 8283 s32 status; 8284 u16 swfw_mask = 0; 8285 8286 if (!this_client) 8287 return E1000_ERR_I2C; 8288 8289 swfw_mask = E1000_SWFW_PHY0_SM; 8290 8291 if (hw->mac.ops.acquire_swfw_sync(hw, swfw_mask)) 8292 return E1000_ERR_SWFW_SYNC; 8293 8294 status = i2c_smbus_read_byte_data(this_client, byte_offset); 8295 hw->mac.ops.release_swfw_sync(hw, swfw_mask); 8296 8297 if (status < 0) 8298 return E1000_ERR_I2C; 8299 else { 8300 *data = status; 8301 return 0; 8302 } 8303 } 8304 8305 /** 8306 * igb_write_i2c_byte - Writes 8 bit word over I2C 8307 * @hw: pointer to hardware structure 8308 * @byte_offset: byte offset to write 8309 * @dev_addr: device address 8310 * @data: value to write 8311 * 8312 * Performs byte write operation over I2C interface at 8313 * a specified device address. 8314 **/ 8315 s32 igb_write_i2c_byte(struct e1000_hw *hw, u8 byte_offset, 8316 u8 dev_addr, u8 data) 8317 { 8318 struct igb_adapter *adapter = container_of(hw, struct igb_adapter, hw); 8319 struct i2c_client *this_client = adapter->i2c_client; 8320 s32 status; 8321 u16 swfw_mask = E1000_SWFW_PHY0_SM; 8322 8323 if (!this_client) 8324 return E1000_ERR_I2C; 8325 8326 if (hw->mac.ops.acquire_swfw_sync(hw, swfw_mask)) 8327 return E1000_ERR_SWFW_SYNC; 8328 status = i2c_smbus_write_byte_data(this_client, byte_offset, data); 8329 hw->mac.ops.release_swfw_sync(hw, swfw_mask); 8330 8331 if (status) 8332 return E1000_ERR_I2C; 8333 else 8334 return 0; 8335 8336 } 8337 8338 int igb_reinit_queues(struct igb_adapter *adapter) 8339 { 8340 struct net_device *netdev = adapter->netdev; 8341 struct pci_dev *pdev = adapter->pdev; 8342 int err = 0; 8343 8344 if (netif_running(netdev)) 8345 igb_close(netdev); 8346 8347 igb_reset_interrupt_capability(adapter); 8348 8349 if (igb_init_interrupt_scheme(adapter, true)) { 8350 dev_err(&pdev->dev, "Unable to allocate memory for queues\n"); 8351 return -ENOMEM; 8352 } 8353 8354 if (netif_running(netdev)) 8355 err = igb_open(netdev); 8356 8357 return err; 8358 } 8359 8360 static void igb_nfc_filter_exit(struct igb_adapter *adapter) 8361 { 8362 struct igb_nfc_filter *rule; 8363 8364 spin_lock(&adapter->nfc_lock); 8365 8366 hlist_for_each_entry(rule, &adapter->nfc_filter_list, nfc_node) 8367 igb_erase_filter(adapter, rule); 8368 8369 spin_unlock(&adapter->nfc_lock); 8370 } 8371 8372 static void igb_nfc_filter_restore(struct igb_adapter *adapter) 8373 { 8374 struct igb_nfc_filter *rule; 8375 8376 spin_lock(&adapter->nfc_lock); 8377 8378 hlist_for_each_entry(rule, &adapter->nfc_filter_list, nfc_node) 8379 igb_add_filter(adapter, rule); 8380 8381 spin_unlock(&adapter->nfc_lock); 8382 } 8383 /* igb_main.c */ 8384