1 /******************************************************************************* 2 3 Intel 10 Gigabit PCI Express Linux driver 4 Copyright(c) 1999 - 2012 Intel Corporation. 5 6 This program is free software; you can redistribute it and/or modify it 7 under the terms and conditions of the GNU General Public License, 8 version 2, as published by the Free Software Foundation. 9 10 This program is distributed in the hope it will be useful, but WITHOUT 11 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 12 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 13 more details. 14 15 You should have received a copy of the GNU General Public License along with 16 this program; if not, write to the Free Software Foundation, Inc., 17 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. 18 19 The full GNU General Public License is included in this distribution in 20 the file called "COPYING". 21 22 Contact Information: 23 e1000-devel Mailing List <e1000-devel@lists.sourceforge.net> 24 Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 25 26 *******************************************************************************/ 27 28 #include <linux/types.h> 29 #include <linux/module.h> 30 #include <linux/pci.h> 31 #include <linux/netdevice.h> 32 #include <linux/vmalloc.h> 33 #include <linux/string.h> 34 #include <linux/in.h> 35 #include <linux/interrupt.h> 36 #include <linux/ip.h> 37 #include <linux/tcp.h> 38 #include <linux/sctp.h> 39 #include <linux/pkt_sched.h> 40 #include <linux/ipv6.h> 41 #include <linux/slab.h> 42 #include <net/checksum.h> 43 #include <net/ip6_checksum.h> 44 #include <linux/ethtool.h> 45 #include <linux/if.h> 46 #include <linux/if_vlan.h> 47 #include <linux/prefetch.h> 48 #include <scsi/fc/fc_fcoe.h> 49 50 #include "ixgbe.h" 51 #include "ixgbe_common.h" 52 #include "ixgbe_dcb_82599.h" 53 #include "ixgbe_sriov.h" 54 55 char ixgbe_driver_name[] = "ixgbe"; 56 static const char ixgbe_driver_string[] = 57 "Intel(R) 10 Gigabit PCI Express Network Driver"; 58 #ifdef IXGBE_FCOE 59 char ixgbe_default_device_descr[] = 60 "Intel(R) 10 Gigabit Network Connection"; 61 #else 62 static char ixgbe_default_device_descr[] = 63 "Intel(R) 10 Gigabit Network Connection"; 64 #endif 65 #define MAJ 3 66 #define MIN 8 67 #define BUILD 21 68 #define DRV_VERSION __stringify(MAJ) "." __stringify(MIN) "." \ 69 __stringify(BUILD) "-k" 70 const char ixgbe_driver_version[] = DRV_VERSION; 71 static const char ixgbe_copyright[] = 72 "Copyright (c) 1999-2012 Intel Corporation."; 73 74 static const struct ixgbe_info *ixgbe_info_tbl[] = { 75 [board_82598] = &ixgbe_82598_info, 76 [board_82599] = &ixgbe_82599_info, 77 [board_X540] = &ixgbe_X540_info, 78 }; 79 80 /* ixgbe_pci_tbl - PCI Device ID Table 81 * 82 * Wildcard entries (PCI_ANY_ID) should come last 83 * Last entry must be all 0s 84 * 85 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID, 86 * Class, Class Mask, private data (not used) } 87 */ 88 static DEFINE_PCI_DEVICE_TABLE(ixgbe_pci_tbl) = { 89 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598), board_82598 }, 90 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AF_DUAL_PORT), board_82598 }, 91 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AF_SINGLE_PORT), board_82598 }, 92 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AT), board_82598 }, 93 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AT2), board_82598 }, 94 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598EB_CX4), board_82598 }, 95 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_CX4_DUAL_PORT), board_82598 }, 96 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_DA_DUAL_PORT), board_82598 }, 97 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_SR_DUAL_PORT_EM), board_82598 }, 98 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598EB_XF_LR), board_82598 }, 99 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598EB_SFP_LOM), board_82598 }, 100 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_BX), board_82598 }, 101 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_KX4), board_82599 }, 102 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_XAUI_LOM), board_82599 }, 103 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_KR), board_82599 }, 104 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_SFP), board_82599 }, 105 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_SFP_EM), board_82599 }, 106 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_KX4_MEZZ), board_82599 }, 107 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_CX4), board_82599 }, 108 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_BACKPLANE_FCOE), board_82599 }, 109 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_SFP_FCOE), board_82599 }, 110 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_T3_LOM), board_82599 }, 111 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_COMBO_BACKPLANE), board_82599 }, 112 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X540T), board_X540 }, 113 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_SFP_SF2), board_82599 }, 114 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_LS), board_82599 }, 115 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599EN_SFP), board_82599 }, 116 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_SFP_SF_QP), board_82599 }, 117 /* required last entry */ 118 {0, } 119 }; 120 MODULE_DEVICE_TABLE(pci, ixgbe_pci_tbl); 121 122 #ifdef CONFIG_IXGBE_DCA 123 static int ixgbe_notify_dca(struct notifier_block *, unsigned long event, 124 void *p); 125 static struct notifier_block dca_notifier = { 126 .notifier_call = ixgbe_notify_dca, 127 .next = NULL, 128 .priority = 0 129 }; 130 #endif 131 132 #ifdef CONFIG_PCI_IOV 133 static unsigned int max_vfs; 134 module_param(max_vfs, uint, 0); 135 MODULE_PARM_DESC(max_vfs, 136 "Maximum number of virtual functions to allocate per physical function"); 137 #endif /* CONFIG_PCI_IOV */ 138 139 static unsigned int allow_unsupported_sfp; 140 module_param(allow_unsupported_sfp, uint, 0); 141 MODULE_PARM_DESC(allow_unsupported_sfp, 142 "Allow unsupported and untested SFP+ modules on 82599-based adapters"); 143 144 #define DEFAULT_MSG_ENABLE (NETIF_MSG_DRV|NETIF_MSG_PROBE|NETIF_MSG_LINK) 145 static int debug = -1; 146 module_param(debug, int, 0); 147 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)"); 148 149 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>"); 150 MODULE_DESCRIPTION("Intel(R) 10 Gigabit PCI Express Network Driver"); 151 MODULE_LICENSE("GPL"); 152 MODULE_VERSION(DRV_VERSION); 153 154 static void ixgbe_service_event_schedule(struct ixgbe_adapter *adapter) 155 { 156 if (!test_bit(__IXGBE_DOWN, &adapter->state) && 157 !test_and_set_bit(__IXGBE_SERVICE_SCHED, &adapter->state)) 158 schedule_work(&adapter->service_task); 159 } 160 161 static void ixgbe_service_event_complete(struct ixgbe_adapter *adapter) 162 { 163 BUG_ON(!test_bit(__IXGBE_SERVICE_SCHED, &adapter->state)); 164 165 /* flush memory to make sure state is correct before next watchdog */ 166 smp_mb__before_clear_bit(); 167 clear_bit(__IXGBE_SERVICE_SCHED, &adapter->state); 168 } 169 170 struct ixgbe_reg_info { 171 u32 ofs; 172 char *name; 173 }; 174 175 static const struct ixgbe_reg_info ixgbe_reg_info_tbl[] = { 176 177 /* General Registers */ 178 {IXGBE_CTRL, "CTRL"}, 179 {IXGBE_STATUS, "STATUS"}, 180 {IXGBE_CTRL_EXT, "CTRL_EXT"}, 181 182 /* Interrupt Registers */ 183 {IXGBE_EICR, "EICR"}, 184 185 /* RX Registers */ 186 {IXGBE_SRRCTL(0), "SRRCTL"}, 187 {IXGBE_DCA_RXCTRL(0), "DRXCTL"}, 188 {IXGBE_RDLEN(0), "RDLEN"}, 189 {IXGBE_RDH(0), "RDH"}, 190 {IXGBE_RDT(0), "RDT"}, 191 {IXGBE_RXDCTL(0), "RXDCTL"}, 192 {IXGBE_RDBAL(0), "RDBAL"}, 193 {IXGBE_RDBAH(0), "RDBAH"}, 194 195 /* TX Registers */ 196 {IXGBE_TDBAL(0), "TDBAL"}, 197 {IXGBE_TDBAH(0), "TDBAH"}, 198 {IXGBE_TDLEN(0), "TDLEN"}, 199 {IXGBE_TDH(0), "TDH"}, 200 {IXGBE_TDT(0), "TDT"}, 201 {IXGBE_TXDCTL(0), "TXDCTL"}, 202 203 /* List Terminator */ 204 {} 205 }; 206 207 208 /* 209 * ixgbe_regdump - register printout routine 210 */ 211 static void ixgbe_regdump(struct ixgbe_hw *hw, struct ixgbe_reg_info *reginfo) 212 { 213 int i = 0, j = 0; 214 char rname[16]; 215 u32 regs[64]; 216 217 switch (reginfo->ofs) { 218 case IXGBE_SRRCTL(0): 219 for (i = 0; i < 64; i++) 220 regs[i] = IXGBE_READ_REG(hw, IXGBE_SRRCTL(i)); 221 break; 222 case IXGBE_DCA_RXCTRL(0): 223 for (i = 0; i < 64; i++) 224 regs[i] = IXGBE_READ_REG(hw, IXGBE_DCA_RXCTRL(i)); 225 break; 226 case IXGBE_RDLEN(0): 227 for (i = 0; i < 64; i++) 228 regs[i] = IXGBE_READ_REG(hw, IXGBE_RDLEN(i)); 229 break; 230 case IXGBE_RDH(0): 231 for (i = 0; i < 64; i++) 232 regs[i] = IXGBE_READ_REG(hw, IXGBE_RDH(i)); 233 break; 234 case IXGBE_RDT(0): 235 for (i = 0; i < 64; i++) 236 regs[i] = IXGBE_READ_REG(hw, IXGBE_RDT(i)); 237 break; 238 case IXGBE_RXDCTL(0): 239 for (i = 0; i < 64; i++) 240 regs[i] = IXGBE_READ_REG(hw, IXGBE_RXDCTL(i)); 241 break; 242 case IXGBE_RDBAL(0): 243 for (i = 0; i < 64; i++) 244 regs[i] = IXGBE_READ_REG(hw, IXGBE_RDBAL(i)); 245 break; 246 case IXGBE_RDBAH(0): 247 for (i = 0; i < 64; i++) 248 regs[i] = IXGBE_READ_REG(hw, IXGBE_RDBAH(i)); 249 break; 250 case IXGBE_TDBAL(0): 251 for (i = 0; i < 64; i++) 252 regs[i] = IXGBE_READ_REG(hw, IXGBE_TDBAL(i)); 253 break; 254 case IXGBE_TDBAH(0): 255 for (i = 0; i < 64; i++) 256 regs[i] = IXGBE_READ_REG(hw, IXGBE_TDBAH(i)); 257 break; 258 case IXGBE_TDLEN(0): 259 for (i = 0; i < 64; i++) 260 regs[i] = IXGBE_READ_REG(hw, IXGBE_TDLEN(i)); 261 break; 262 case IXGBE_TDH(0): 263 for (i = 0; i < 64; i++) 264 regs[i] = IXGBE_READ_REG(hw, IXGBE_TDH(i)); 265 break; 266 case IXGBE_TDT(0): 267 for (i = 0; i < 64; i++) 268 regs[i] = IXGBE_READ_REG(hw, IXGBE_TDT(i)); 269 break; 270 case IXGBE_TXDCTL(0): 271 for (i = 0; i < 64; i++) 272 regs[i] = IXGBE_READ_REG(hw, IXGBE_TXDCTL(i)); 273 break; 274 default: 275 pr_info("%-15s %08x\n", reginfo->name, 276 IXGBE_READ_REG(hw, reginfo->ofs)); 277 return; 278 } 279 280 for (i = 0; i < 8; i++) { 281 snprintf(rname, 16, "%s[%d-%d]", reginfo->name, i*8, i*8+7); 282 pr_err("%-15s", rname); 283 for (j = 0; j < 8; j++) 284 pr_cont(" %08x", regs[i*8+j]); 285 pr_cont("\n"); 286 } 287 288 } 289 290 /* 291 * ixgbe_dump - Print registers, tx-rings and rx-rings 292 */ 293 static void ixgbe_dump(struct ixgbe_adapter *adapter) 294 { 295 struct net_device *netdev = adapter->netdev; 296 struct ixgbe_hw *hw = &adapter->hw; 297 struct ixgbe_reg_info *reginfo; 298 int n = 0; 299 struct ixgbe_ring *tx_ring; 300 struct ixgbe_tx_buffer *tx_buffer; 301 union ixgbe_adv_tx_desc *tx_desc; 302 struct my_u0 { u64 a; u64 b; } *u0; 303 struct ixgbe_ring *rx_ring; 304 union ixgbe_adv_rx_desc *rx_desc; 305 struct ixgbe_rx_buffer *rx_buffer_info; 306 u32 staterr; 307 int i = 0; 308 309 if (!netif_msg_hw(adapter)) 310 return; 311 312 /* Print netdevice Info */ 313 if (netdev) { 314 dev_info(&adapter->pdev->dev, "Net device Info\n"); 315 pr_info("Device Name state " 316 "trans_start last_rx\n"); 317 pr_info("%-15s %016lX %016lX %016lX\n", 318 netdev->name, 319 netdev->state, 320 netdev->trans_start, 321 netdev->last_rx); 322 } 323 324 /* Print Registers */ 325 dev_info(&adapter->pdev->dev, "Register Dump\n"); 326 pr_info(" Register Name Value\n"); 327 for (reginfo = (struct ixgbe_reg_info *)ixgbe_reg_info_tbl; 328 reginfo->name; reginfo++) { 329 ixgbe_regdump(hw, reginfo); 330 } 331 332 /* Print TX Ring Summary */ 333 if (!netdev || !netif_running(netdev)) 334 goto exit; 335 336 dev_info(&adapter->pdev->dev, "TX Rings Summary\n"); 337 pr_info("Queue [NTU] [NTC] [bi(ntc)->dma ] leng ntw timestamp\n"); 338 for (n = 0; n < adapter->num_tx_queues; n++) { 339 tx_ring = adapter->tx_ring[n]; 340 tx_buffer = &tx_ring->tx_buffer_info[tx_ring->next_to_clean]; 341 pr_info(" %5d %5X %5X %016llX %04X %p %016llX\n", 342 n, tx_ring->next_to_use, tx_ring->next_to_clean, 343 (u64)dma_unmap_addr(tx_buffer, dma), 344 dma_unmap_len(tx_buffer, len), 345 tx_buffer->next_to_watch, 346 (u64)tx_buffer->time_stamp); 347 } 348 349 /* Print TX Rings */ 350 if (!netif_msg_tx_done(adapter)) 351 goto rx_ring_summary; 352 353 dev_info(&adapter->pdev->dev, "TX Rings Dump\n"); 354 355 /* Transmit Descriptor Formats 356 * 357 * Advanced Transmit Descriptor 358 * +--------------------------------------------------------------+ 359 * 0 | Buffer Address [63:0] | 360 * +--------------------------------------------------------------+ 361 * 8 | PAYLEN | PORTS | IDX | STA | DCMD |DTYP | RSV | DTALEN | 362 * +--------------------------------------------------------------+ 363 * 63 46 45 40 39 36 35 32 31 24 23 20 19 0 364 */ 365 366 for (n = 0; n < adapter->num_tx_queues; n++) { 367 tx_ring = adapter->tx_ring[n]; 368 pr_info("------------------------------------\n"); 369 pr_info("TX QUEUE INDEX = %d\n", tx_ring->queue_index); 370 pr_info("------------------------------------\n"); 371 pr_info("T [desc] [address 63:0 ] " 372 "[PlPOIdStDDt Ln] [bi->dma ] " 373 "leng ntw timestamp bi->skb\n"); 374 375 for (i = 0; tx_ring->desc && (i < tx_ring->count); i++) { 376 tx_desc = IXGBE_TX_DESC(tx_ring, i); 377 tx_buffer = &tx_ring->tx_buffer_info[i]; 378 u0 = (struct my_u0 *)tx_desc; 379 pr_info("T [0x%03X] %016llX %016llX %016llX" 380 " %04X %p %016llX %p", i, 381 le64_to_cpu(u0->a), 382 le64_to_cpu(u0->b), 383 (u64)dma_unmap_addr(tx_buffer, dma), 384 dma_unmap_len(tx_buffer, len), 385 tx_buffer->next_to_watch, 386 (u64)tx_buffer->time_stamp, 387 tx_buffer->skb); 388 if (i == tx_ring->next_to_use && 389 i == tx_ring->next_to_clean) 390 pr_cont(" NTC/U\n"); 391 else if (i == tx_ring->next_to_use) 392 pr_cont(" NTU\n"); 393 else if (i == tx_ring->next_to_clean) 394 pr_cont(" NTC\n"); 395 else 396 pr_cont("\n"); 397 398 if (netif_msg_pktdata(adapter) && 399 dma_unmap_len(tx_buffer, len) != 0) 400 print_hex_dump(KERN_INFO, "", 401 DUMP_PREFIX_ADDRESS, 16, 1, 402 phys_to_virt(dma_unmap_addr(tx_buffer, 403 dma)), 404 dma_unmap_len(tx_buffer, len), 405 true); 406 } 407 } 408 409 /* Print RX Rings Summary */ 410 rx_ring_summary: 411 dev_info(&adapter->pdev->dev, "RX Rings Summary\n"); 412 pr_info("Queue [NTU] [NTC]\n"); 413 for (n = 0; n < adapter->num_rx_queues; n++) { 414 rx_ring = adapter->rx_ring[n]; 415 pr_info("%5d %5X %5X\n", 416 n, rx_ring->next_to_use, rx_ring->next_to_clean); 417 } 418 419 /* Print RX Rings */ 420 if (!netif_msg_rx_status(adapter)) 421 goto exit; 422 423 dev_info(&adapter->pdev->dev, "RX Rings Dump\n"); 424 425 /* Advanced Receive Descriptor (Read) Format 426 * 63 1 0 427 * +-----------------------------------------------------+ 428 * 0 | Packet Buffer Address [63:1] |A0/NSE| 429 * +----------------------------------------------+------+ 430 * 8 | Header Buffer Address [63:1] | DD | 431 * +-----------------------------------------------------+ 432 * 433 * 434 * Advanced Receive Descriptor (Write-Back) Format 435 * 436 * 63 48 47 32 31 30 21 20 16 15 4 3 0 437 * +------------------------------------------------------+ 438 * 0 | Packet IP |SPH| HDR_LEN | RSV|Packet| RSS | 439 * | Checksum Ident | | | | Type | Type | 440 * +------------------------------------------------------+ 441 * 8 | VLAN Tag | Length | Extended Error | Extended Status | 442 * +------------------------------------------------------+ 443 * 63 48 47 32 31 20 19 0 444 */ 445 for (n = 0; n < adapter->num_rx_queues; n++) { 446 rx_ring = adapter->rx_ring[n]; 447 pr_info("------------------------------------\n"); 448 pr_info("RX QUEUE INDEX = %d\n", rx_ring->queue_index); 449 pr_info("------------------------------------\n"); 450 pr_info("R [desc] [ PktBuf A0] " 451 "[ HeadBuf DD] [bi->dma ] [bi->skb] " 452 "<-- Adv Rx Read format\n"); 453 pr_info("RWB[desc] [PcsmIpSHl PtRs] " 454 "[vl er S cks ln] ---------------- [bi->skb] " 455 "<-- Adv Rx Write-Back format\n"); 456 457 for (i = 0; i < rx_ring->count; i++) { 458 rx_buffer_info = &rx_ring->rx_buffer_info[i]; 459 rx_desc = IXGBE_RX_DESC(rx_ring, i); 460 u0 = (struct my_u0 *)rx_desc; 461 staterr = le32_to_cpu(rx_desc->wb.upper.status_error); 462 if (staterr & IXGBE_RXD_STAT_DD) { 463 /* Descriptor Done */ 464 pr_info("RWB[0x%03X] %016llX " 465 "%016llX ---------------- %p", i, 466 le64_to_cpu(u0->a), 467 le64_to_cpu(u0->b), 468 rx_buffer_info->skb); 469 } else { 470 pr_info("R [0x%03X] %016llX " 471 "%016llX %016llX %p", i, 472 le64_to_cpu(u0->a), 473 le64_to_cpu(u0->b), 474 (u64)rx_buffer_info->dma, 475 rx_buffer_info->skb); 476 477 if (netif_msg_pktdata(adapter)) { 478 print_hex_dump(KERN_INFO, "", 479 DUMP_PREFIX_ADDRESS, 16, 1, 480 phys_to_virt(rx_buffer_info->dma), 481 ixgbe_rx_bufsz(rx_ring), true); 482 } 483 } 484 485 if (i == rx_ring->next_to_use) 486 pr_cont(" NTU\n"); 487 else if (i == rx_ring->next_to_clean) 488 pr_cont(" NTC\n"); 489 else 490 pr_cont("\n"); 491 492 } 493 } 494 495 exit: 496 return; 497 } 498 499 static void ixgbe_release_hw_control(struct ixgbe_adapter *adapter) 500 { 501 u32 ctrl_ext; 502 503 /* Let firmware take over control of h/w */ 504 ctrl_ext = IXGBE_READ_REG(&adapter->hw, IXGBE_CTRL_EXT); 505 IXGBE_WRITE_REG(&adapter->hw, IXGBE_CTRL_EXT, 506 ctrl_ext & ~IXGBE_CTRL_EXT_DRV_LOAD); 507 } 508 509 static void ixgbe_get_hw_control(struct ixgbe_adapter *adapter) 510 { 511 u32 ctrl_ext; 512 513 /* Let firmware know the driver has taken over */ 514 ctrl_ext = IXGBE_READ_REG(&adapter->hw, IXGBE_CTRL_EXT); 515 IXGBE_WRITE_REG(&adapter->hw, IXGBE_CTRL_EXT, 516 ctrl_ext | IXGBE_CTRL_EXT_DRV_LOAD); 517 } 518 519 /* 520 * ixgbe_set_ivar - set the IVAR registers, mapping interrupt causes to vectors 521 * @adapter: pointer to adapter struct 522 * @direction: 0 for Rx, 1 for Tx, -1 for other causes 523 * @queue: queue to map the corresponding interrupt to 524 * @msix_vector: the vector to map to the corresponding queue 525 * 526 */ 527 static void ixgbe_set_ivar(struct ixgbe_adapter *adapter, s8 direction, 528 u8 queue, u8 msix_vector) 529 { 530 u32 ivar, index; 531 struct ixgbe_hw *hw = &adapter->hw; 532 switch (hw->mac.type) { 533 case ixgbe_mac_82598EB: 534 msix_vector |= IXGBE_IVAR_ALLOC_VAL; 535 if (direction == -1) 536 direction = 0; 537 index = (((direction * 64) + queue) >> 2) & 0x1F; 538 ivar = IXGBE_READ_REG(hw, IXGBE_IVAR(index)); 539 ivar &= ~(0xFF << (8 * (queue & 0x3))); 540 ivar |= (msix_vector << (8 * (queue & 0x3))); 541 IXGBE_WRITE_REG(hw, IXGBE_IVAR(index), ivar); 542 break; 543 case ixgbe_mac_82599EB: 544 case ixgbe_mac_X540: 545 if (direction == -1) { 546 /* other causes */ 547 msix_vector |= IXGBE_IVAR_ALLOC_VAL; 548 index = ((queue & 1) * 8); 549 ivar = IXGBE_READ_REG(&adapter->hw, IXGBE_IVAR_MISC); 550 ivar &= ~(0xFF << index); 551 ivar |= (msix_vector << index); 552 IXGBE_WRITE_REG(&adapter->hw, IXGBE_IVAR_MISC, ivar); 553 break; 554 } else { 555 /* tx or rx causes */ 556 msix_vector |= IXGBE_IVAR_ALLOC_VAL; 557 index = ((16 * (queue & 1)) + (8 * direction)); 558 ivar = IXGBE_READ_REG(hw, IXGBE_IVAR(queue >> 1)); 559 ivar &= ~(0xFF << index); 560 ivar |= (msix_vector << index); 561 IXGBE_WRITE_REG(hw, IXGBE_IVAR(queue >> 1), ivar); 562 break; 563 } 564 default: 565 break; 566 } 567 } 568 569 static inline void ixgbe_irq_rearm_queues(struct ixgbe_adapter *adapter, 570 u64 qmask) 571 { 572 u32 mask; 573 574 switch (adapter->hw.mac.type) { 575 case ixgbe_mac_82598EB: 576 mask = (IXGBE_EIMS_RTX_QUEUE & qmask); 577 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS, mask); 578 break; 579 case ixgbe_mac_82599EB: 580 case ixgbe_mac_X540: 581 mask = (qmask & 0xFFFFFFFF); 582 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS_EX(0), mask); 583 mask = (qmask >> 32); 584 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS_EX(1), mask); 585 break; 586 default: 587 break; 588 } 589 } 590 591 void ixgbe_unmap_and_free_tx_resource(struct ixgbe_ring *ring, 592 struct ixgbe_tx_buffer *tx_buffer) 593 { 594 if (tx_buffer->skb) { 595 dev_kfree_skb_any(tx_buffer->skb); 596 if (dma_unmap_len(tx_buffer, len)) 597 dma_unmap_single(ring->dev, 598 dma_unmap_addr(tx_buffer, dma), 599 dma_unmap_len(tx_buffer, len), 600 DMA_TO_DEVICE); 601 } else if (dma_unmap_len(tx_buffer, len)) { 602 dma_unmap_page(ring->dev, 603 dma_unmap_addr(tx_buffer, dma), 604 dma_unmap_len(tx_buffer, len), 605 DMA_TO_DEVICE); 606 } 607 tx_buffer->next_to_watch = NULL; 608 tx_buffer->skb = NULL; 609 dma_unmap_len_set(tx_buffer, len, 0); 610 /* tx_buffer must be completely set up in the transmit path */ 611 } 612 613 static void ixgbe_update_xoff_received(struct ixgbe_adapter *adapter) 614 { 615 struct ixgbe_hw *hw = &adapter->hw; 616 struct ixgbe_hw_stats *hwstats = &adapter->stats; 617 u32 data = 0; 618 u32 xoff[8] = {0}; 619 int i; 620 621 if ((hw->fc.current_mode == ixgbe_fc_full) || 622 (hw->fc.current_mode == ixgbe_fc_rx_pause)) { 623 switch (hw->mac.type) { 624 case ixgbe_mac_82598EB: 625 data = IXGBE_READ_REG(hw, IXGBE_LXOFFRXC); 626 break; 627 default: 628 data = IXGBE_READ_REG(hw, IXGBE_LXOFFRXCNT); 629 } 630 hwstats->lxoffrxc += data; 631 632 /* refill credits (no tx hang) if we received xoff */ 633 if (!data) 634 return; 635 636 for (i = 0; i < adapter->num_tx_queues; i++) 637 clear_bit(__IXGBE_HANG_CHECK_ARMED, 638 &adapter->tx_ring[i]->state); 639 return; 640 } else if (!(adapter->dcb_cfg.pfc_mode_enable)) 641 return; 642 643 /* update stats for each tc, only valid with PFC enabled */ 644 for (i = 0; i < MAX_TX_PACKET_BUFFERS; i++) { 645 switch (hw->mac.type) { 646 case ixgbe_mac_82598EB: 647 xoff[i] = IXGBE_READ_REG(hw, IXGBE_PXOFFRXC(i)); 648 break; 649 default: 650 xoff[i] = IXGBE_READ_REG(hw, IXGBE_PXOFFRXCNT(i)); 651 } 652 hwstats->pxoffrxc[i] += xoff[i]; 653 } 654 655 /* disarm tx queues that have received xoff frames */ 656 for (i = 0; i < adapter->num_tx_queues; i++) { 657 struct ixgbe_ring *tx_ring = adapter->tx_ring[i]; 658 u8 tc = tx_ring->dcb_tc; 659 660 if (xoff[tc]) 661 clear_bit(__IXGBE_HANG_CHECK_ARMED, &tx_ring->state); 662 } 663 } 664 665 static u64 ixgbe_get_tx_completed(struct ixgbe_ring *ring) 666 { 667 return ring->stats.packets; 668 } 669 670 static u64 ixgbe_get_tx_pending(struct ixgbe_ring *ring) 671 { 672 struct ixgbe_adapter *adapter = netdev_priv(ring->netdev); 673 struct ixgbe_hw *hw = &adapter->hw; 674 675 u32 head = IXGBE_READ_REG(hw, IXGBE_TDH(ring->reg_idx)); 676 u32 tail = IXGBE_READ_REG(hw, IXGBE_TDT(ring->reg_idx)); 677 678 if (head != tail) 679 return (head < tail) ? 680 tail - head : (tail + ring->count - head); 681 682 return 0; 683 } 684 685 static inline bool ixgbe_check_tx_hang(struct ixgbe_ring *tx_ring) 686 { 687 u32 tx_done = ixgbe_get_tx_completed(tx_ring); 688 u32 tx_done_old = tx_ring->tx_stats.tx_done_old; 689 u32 tx_pending = ixgbe_get_tx_pending(tx_ring); 690 bool ret = false; 691 692 clear_check_for_tx_hang(tx_ring); 693 694 /* 695 * Check for a hung queue, but be thorough. This verifies 696 * that a transmit has been completed since the previous 697 * check AND there is at least one packet pending. The 698 * ARMED bit is set to indicate a potential hang. The 699 * bit is cleared if a pause frame is received to remove 700 * false hang detection due to PFC or 802.3x frames. By 701 * requiring this to fail twice we avoid races with 702 * pfc clearing the ARMED bit and conditions where we 703 * run the check_tx_hang logic with a transmit completion 704 * pending but without time to complete it yet. 705 */ 706 if ((tx_done_old == tx_done) && tx_pending) { 707 /* make sure it is true for two checks in a row */ 708 ret = test_and_set_bit(__IXGBE_HANG_CHECK_ARMED, 709 &tx_ring->state); 710 } else { 711 /* update completed stats and continue */ 712 tx_ring->tx_stats.tx_done_old = tx_done; 713 /* reset the countdown */ 714 clear_bit(__IXGBE_HANG_CHECK_ARMED, &tx_ring->state); 715 } 716 717 return ret; 718 } 719 720 /** 721 * ixgbe_tx_timeout_reset - initiate reset due to Tx timeout 722 * @adapter: driver private struct 723 **/ 724 static void ixgbe_tx_timeout_reset(struct ixgbe_adapter *adapter) 725 { 726 727 /* Do the reset outside of interrupt context */ 728 if (!test_bit(__IXGBE_DOWN, &adapter->state)) { 729 adapter->flags2 |= IXGBE_FLAG2_RESET_REQUESTED; 730 ixgbe_service_event_schedule(adapter); 731 } 732 } 733 734 /** 735 * ixgbe_clean_tx_irq - Reclaim resources after transmit completes 736 * @q_vector: structure containing interrupt and ring information 737 * @tx_ring: tx ring to clean 738 **/ 739 static bool ixgbe_clean_tx_irq(struct ixgbe_q_vector *q_vector, 740 struct ixgbe_ring *tx_ring) 741 { 742 struct ixgbe_adapter *adapter = q_vector->adapter; 743 struct ixgbe_tx_buffer *tx_buffer; 744 union ixgbe_adv_tx_desc *tx_desc; 745 unsigned int total_bytes = 0, total_packets = 0; 746 unsigned int budget = q_vector->tx.work_limit; 747 unsigned int i = tx_ring->next_to_clean; 748 749 if (test_bit(__IXGBE_DOWN, &adapter->state)) 750 return true; 751 752 tx_buffer = &tx_ring->tx_buffer_info[i]; 753 tx_desc = IXGBE_TX_DESC(tx_ring, i); 754 i -= tx_ring->count; 755 756 do { 757 union ixgbe_adv_tx_desc *eop_desc = tx_buffer->next_to_watch; 758 759 /* if next_to_watch is not set then there is no work pending */ 760 if (!eop_desc) 761 break; 762 763 /* prevent any other reads prior to eop_desc */ 764 rmb(); 765 766 /* if DD is not set pending work has not been completed */ 767 if (!(eop_desc->wb.status & cpu_to_le32(IXGBE_TXD_STAT_DD))) 768 break; 769 770 /* clear next_to_watch to prevent false hangs */ 771 tx_buffer->next_to_watch = NULL; 772 773 /* update the statistics for this packet */ 774 total_bytes += tx_buffer->bytecount; 775 total_packets += tx_buffer->gso_segs; 776 777 /* free the skb */ 778 dev_kfree_skb_any(tx_buffer->skb); 779 780 /* unmap skb header data */ 781 dma_unmap_single(tx_ring->dev, 782 dma_unmap_addr(tx_buffer, dma), 783 dma_unmap_len(tx_buffer, len), 784 DMA_TO_DEVICE); 785 786 /* clear tx_buffer data */ 787 tx_buffer->skb = NULL; 788 dma_unmap_len_set(tx_buffer, len, 0); 789 790 /* unmap remaining buffers */ 791 while (tx_desc != eop_desc) { 792 tx_buffer++; 793 tx_desc++; 794 i++; 795 if (unlikely(!i)) { 796 i -= tx_ring->count; 797 tx_buffer = tx_ring->tx_buffer_info; 798 tx_desc = IXGBE_TX_DESC(tx_ring, 0); 799 } 800 801 /* unmap any remaining paged data */ 802 if (dma_unmap_len(tx_buffer, len)) { 803 dma_unmap_page(tx_ring->dev, 804 dma_unmap_addr(tx_buffer, dma), 805 dma_unmap_len(tx_buffer, len), 806 DMA_TO_DEVICE); 807 dma_unmap_len_set(tx_buffer, len, 0); 808 } 809 } 810 811 /* move us one more past the eop_desc for start of next pkt */ 812 tx_buffer++; 813 tx_desc++; 814 i++; 815 if (unlikely(!i)) { 816 i -= tx_ring->count; 817 tx_buffer = tx_ring->tx_buffer_info; 818 tx_desc = IXGBE_TX_DESC(tx_ring, 0); 819 } 820 821 /* issue prefetch for next Tx descriptor */ 822 prefetch(tx_desc); 823 824 /* update budget accounting */ 825 budget--; 826 } while (likely(budget)); 827 828 i += tx_ring->count; 829 tx_ring->next_to_clean = i; 830 u64_stats_update_begin(&tx_ring->syncp); 831 tx_ring->stats.bytes += total_bytes; 832 tx_ring->stats.packets += total_packets; 833 u64_stats_update_end(&tx_ring->syncp); 834 q_vector->tx.total_bytes += total_bytes; 835 q_vector->tx.total_packets += total_packets; 836 837 if (check_for_tx_hang(tx_ring) && ixgbe_check_tx_hang(tx_ring)) { 838 /* schedule immediate reset if we believe we hung */ 839 struct ixgbe_hw *hw = &adapter->hw; 840 e_err(drv, "Detected Tx Unit Hang\n" 841 " Tx Queue <%d>\n" 842 " TDH, TDT <%x>, <%x>\n" 843 " next_to_use <%x>\n" 844 " next_to_clean <%x>\n" 845 "tx_buffer_info[next_to_clean]\n" 846 " time_stamp <%lx>\n" 847 " jiffies <%lx>\n", 848 tx_ring->queue_index, 849 IXGBE_READ_REG(hw, IXGBE_TDH(tx_ring->reg_idx)), 850 IXGBE_READ_REG(hw, IXGBE_TDT(tx_ring->reg_idx)), 851 tx_ring->next_to_use, i, 852 tx_ring->tx_buffer_info[i].time_stamp, jiffies); 853 854 netif_stop_subqueue(tx_ring->netdev, tx_ring->queue_index); 855 856 e_info(probe, 857 "tx hang %d detected on queue %d, resetting adapter\n", 858 adapter->tx_timeout_count + 1, tx_ring->queue_index); 859 860 /* schedule immediate reset if we believe we hung */ 861 ixgbe_tx_timeout_reset(adapter); 862 863 /* the adapter is about to reset, no point in enabling stuff */ 864 return true; 865 } 866 867 netdev_tx_completed_queue(txring_txq(tx_ring), 868 total_packets, total_bytes); 869 870 #define TX_WAKE_THRESHOLD (DESC_NEEDED * 2) 871 if (unlikely(total_packets && netif_carrier_ok(tx_ring->netdev) && 872 (ixgbe_desc_unused(tx_ring) >= TX_WAKE_THRESHOLD))) { 873 /* Make sure that anybody stopping the queue after this 874 * sees the new next_to_clean. 875 */ 876 smp_mb(); 877 if (__netif_subqueue_stopped(tx_ring->netdev, 878 tx_ring->queue_index) 879 && !test_bit(__IXGBE_DOWN, &adapter->state)) { 880 netif_wake_subqueue(tx_ring->netdev, 881 tx_ring->queue_index); 882 ++tx_ring->tx_stats.restart_queue; 883 } 884 } 885 886 return !!budget; 887 } 888 889 #ifdef CONFIG_IXGBE_DCA 890 static void ixgbe_update_tx_dca(struct ixgbe_adapter *adapter, 891 struct ixgbe_ring *tx_ring, 892 int cpu) 893 { 894 struct ixgbe_hw *hw = &adapter->hw; 895 u32 txctrl = dca3_get_tag(tx_ring->dev, cpu); 896 u16 reg_offset; 897 898 switch (hw->mac.type) { 899 case ixgbe_mac_82598EB: 900 reg_offset = IXGBE_DCA_TXCTRL(tx_ring->reg_idx); 901 break; 902 case ixgbe_mac_82599EB: 903 case ixgbe_mac_X540: 904 reg_offset = IXGBE_DCA_TXCTRL_82599(tx_ring->reg_idx); 905 txctrl <<= IXGBE_DCA_TXCTRL_CPUID_SHIFT_82599; 906 break; 907 default: 908 /* for unknown hardware do not write register */ 909 return; 910 } 911 912 /* 913 * We can enable relaxed ordering for reads, but not writes when 914 * DCA is enabled. This is due to a known issue in some chipsets 915 * which will cause the DCA tag to be cleared. 916 */ 917 txctrl |= IXGBE_DCA_TXCTRL_DESC_RRO_EN | 918 IXGBE_DCA_TXCTRL_DATA_RRO_EN | 919 IXGBE_DCA_TXCTRL_DESC_DCA_EN; 920 921 IXGBE_WRITE_REG(hw, reg_offset, txctrl); 922 } 923 924 static void ixgbe_update_rx_dca(struct ixgbe_adapter *adapter, 925 struct ixgbe_ring *rx_ring, 926 int cpu) 927 { 928 struct ixgbe_hw *hw = &adapter->hw; 929 u32 rxctrl = dca3_get_tag(rx_ring->dev, cpu); 930 u8 reg_idx = rx_ring->reg_idx; 931 932 933 switch (hw->mac.type) { 934 case ixgbe_mac_82599EB: 935 case ixgbe_mac_X540: 936 rxctrl <<= IXGBE_DCA_RXCTRL_CPUID_SHIFT_82599; 937 break; 938 default: 939 break; 940 } 941 942 /* 943 * We can enable relaxed ordering for reads, but not writes when 944 * DCA is enabled. This is due to a known issue in some chipsets 945 * which will cause the DCA tag to be cleared. 946 */ 947 rxctrl |= IXGBE_DCA_RXCTRL_DESC_RRO_EN | 948 IXGBE_DCA_RXCTRL_DATA_DCA_EN | 949 IXGBE_DCA_RXCTRL_DESC_DCA_EN; 950 951 IXGBE_WRITE_REG(hw, IXGBE_DCA_RXCTRL(reg_idx), rxctrl); 952 } 953 954 static void ixgbe_update_dca(struct ixgbe_q_vector *q_vector) 955 { 956 struct ixgbe_adapter *adapter = q_vector->adapter; 957 struct ixgbe_ring *ring; 958 int cpu = get_cpu(); 959 960 if (q_vector->cpu == cpu) 961 goto out_no_update; 962 963 ixgbe_for_each_ring(ring, q_vector->tx) 964 ixgbe_update_tx_dca(adapter, ring, cpu); 965 966 ixgbe_for_each_ring(ring, q_vector->rx) 967 ixgbe_update_rx_dca(adapter, ring, cpu); 968 969 q_vector->cpu = cpu; 970 out_no_update: 971 put_cpu(); 972 } 973 974 static void ixgbe_setup_dca(struct ixgbe_adapter *adapter) 975 { 976 int num_q_vectors; 977 int i; 978 979 if (!(adapter->flags & IXGBE_FLAG_DCA_ENABLED)) 980 return; 981 982 /* always use CB2 mode, difference is masked in the CB driver */ 983 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL, 2); 984 985 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) 986 num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS; 987 else 988 num_q_vectors = 1; 989 990 for (i = 0; i < num_q_vectors; i++) { 991 adapter->q_vector[i]->cpu = -1; 992 ixgbe_update_dca(adapter->q_vector[i]); 993 } 994 } 995 996 static int __ixgbe_notify_dca(struct device *dev, void *data) 997 { 998 struct ixgbe_adapter *adapter = dev_get_drvdata(dev); 999 unsigned long event = *(unsigned long *)data; 1000 1001 if (!(adapter->flags & IXGBE_FLAG_DCA_CAPABLE)) 1002 return 0; 1003 1004 switch (event) { 1005 case DCA_PROVIDER_ADD: 1006 /* if we're already enabled, don't do it again */ 1007 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) 1008 break; 1009 if (dca_add_requester(dev) == 0) { 1010 adapter->flags |= IXGBE_FLAG_DCA_ENABLED; 1011 ixgbe_setup_dca(adapter); 1012 break; 1013 } 1014 /* Fall Through since DCA is disabled. */ 1015 case DCA_PROVIDER_REMOVE: 1016 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) { 1017 dca_remove_requester(dev); 1018 adapter->flags &= ~IXGBE_FLAG_DCA_ENABLED; 1019 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL, 1); 1020 } 1021 break; 1022 } 1023 1024 return 0; 1025 } 1026 1027 #endif /* CONFIG_IXGBE_DCA */ 1028 static inline void ixgbe_rx_hash(struct ixgbe_ring *ring, 1029 union ixgbe_adv_rx_desc *rx_desc, 1030 struct sk_buff *skb) 1031 { 1032 if (ring->netdev->features & NETIF_F_RXHASH) 1033 skb->rxhash = le32_to_cpu(rx_desc->wb.lower.hi_dword.rss); 1034 } 1035 1036 #ifdef IXGBE_FCOE 1037 /** 1038 * ixgbe_rx_is_fcoe - check the rx desc for incoming pkt type 1039 * @adapter: address of board private structure 1040 * @rx_desc: advanced rx descriptor 1041 * 1042 * Returns : true if it is FCoE pkt 1043 */ 1044 static inline bool ixgbe_rx_is_fcoe(struct ixgbe_adapter *adapter, 1045 union ixgbe_adv_rx_desc *rx_desc) 1046 { 1047 __le16 pkt_info = rx_desc->wb.lower.lo_dword.hs_rss.pkt_info; 1048 1049 return (adapter->flags & IXGBE_FLAG_FCOE_ENABLED) && 1050 ((pkt_info & cpu_to_le16(IXGBE_RXDADV_PKTTYPE_ETQF_MASK)) == 1051 (cpu_to_le16(IXGBE_ETQF_FILTER_FCOE << 1052 IXGBE_RXDADV_PKTTYPE_ETQF_SHIFT))); 1053 } 1054 1055 #endif /* IXGBE_FCOE */ 1056 /** 1057 * ixgbe_rx_checksum - indicate in skb if hw indicated a good cksum 1058 * @ring: structure containing ring specific data 1059 * @rx_desc: current Rx descriptor being processed 1060 * @skb: skb currently being received and modified 1061 **/ 1062 static inline void ixgbe_rx_checksum(struct ixgbe_ring *ring, 1063 union ixgbe_adv_rx_desc *rx_desc, 1064 struct sk_buff *skb) 1065 { 1066 skb_checksum_none_assert(skb); 1067 1068 /* Rx csum disabled */ 1069 if (!(ring->netdev->features & NETIF_F_RXCSUM)) 1070 return; 1071 1072 /* if IP and error */ 1073 if (ixgbe_test_staterr(rx_desc, IXGBE_RXD_STAT_IPCS) && 1074 ixgbe_test_staterr(rx_desc, IXGBE_RXDADV_ERR_IPE)) { 1075 ring->rx_stats.csum_err++; 1076 return; 1077 } 1078 1079 if (!ixgbe_test_staterr(rx_desc, IXGBE_RXD_STAT_L4CS)) 1080 return; 1081 1082 if (ixgbe_test_staterr(rx_desc, IXGBE_RXDADV_ERR_TCPE)) { 1083 __le16 pkt_info = rx_desc->wb.lower.lo_dword.hs_rss.pkt_info; 1084 1085 /* 1086 * 82599 errata, UDP frames with a 0 checksum can be marked as 1087 * checksum errors. 1088 */ 1089 if ((pkt_info & cpu_to_le16(IXGBE_RXDADV_PKTTYPE_UDP)) && 1090 test_bit(__IXGBE_RX_CSUM_UDP_ZERO_ERR, &ring->state)) 1091 return; 1092 1093 ring->rx_stats.csum_err++; 1094 return; 1095 } 1096 1097 /* It must be a TCP or UDP packet with a valid checksum */ 1098 skb->ip_summed = CHECKSUM_UNNECESSARY; 1099 } 1100 1101 static inline void ixgbe_release_rx_desc(struct ixgbe_ring *rx_ring, u32 val) 1102 { 1103 rx_ring->next_to_use = val; 1104 1105 /* update next to alloc since we have filled the ring */ 1106 rx_ring->next_to_alloc = val; 1107 /* 1108 * Force memory writes to complete before letting h/w 1109 * know there are new descriptors to fetch. (Only 1110 * applicable for weak-ordered memory model archs, 1111 * such as IA-64). 1112 */ 1113 wmb(); 1114 writel(val, rx_ring->tail); 1115 } 1116 1117 static bool ixgbe_alloc_mapped_page(struct ixgbe_ring *rx_ring, 1118 struct ixgbe_rx_buffer *bi) 1119 { 1120 struct page *page = bi->page; 1121 dma_addr_t dma = bi->dma; 1122 1123 /* since we are recycling buffers we should seldom need to alloc */ 1124 if (likely(dma)) 1125 return true; 1126 1127 /* alloc new page for storage */ 1128 if (likely(!page)) { 1129 page = alloc_pages(GFP_ATOMIC | __GFP_COLD, 1130 ixgbe_rx_pg_order(rx_ring)); 1131 if (unlikely(!page)) { 1132 rx_ring->rx_stats.alloc_rx_page_failed++; 1133 return false; 1134 } 1135 bi->page = page; 1136 } 1137 1138 /* map page for use */ 1139 dma = dma_map_page(rx_ring->dev, page, 0, 1140 ixgbe_rx_pg_size(rx_ring), DMA_FROM_DEVICE); 1141 1142 /* 1143 * if mapping failed free memory back to system since 1144 * there isn't much point in holding memory we can't use 1145 */ 1146 if (dma_mapping_error(rx_ring->dev, dma)) { 1147 put_page(page); 1148 bi->page = NULL; 1149 1150 rx_ring->rx_stats.alloc_rx_page_failed++; 1151 return false; 1152 } 1153 1154 bi->dma = dma; 1155 bi->page_offset ^= ixgbe_rx_bufsz(rx_ring); 1156 1157 return true; 1158 } 1159 1160 /** 1161 * ixgbe_alloc_rx_buffers - Replace used receive buffers 1162 * @rx_ring: ring to place buffers on 1163 * @cleaned_count: number of buffers to replace 1164 **/ 1165 void ixgbe_alloc_rx_buffers(struct ixgbe_ring *rx_ring, u16 cleaned_count) 1166 { 1167 union ixgbe_adv_rx_desc *rx_desc; 1168 struct ixgbe_rx_buffer *bi; 1169 u16 i = rx_ring->next_to_use; 1170 1171 /* nothing to do */ 1172 if (!cleaned_count) 1173 return; 1174 1175 rx_desc = IXGBE_RX_DESC(rx_ring, i); 1176 bi = &rx_ring->rx_buffer_info[i]; 1177 i -= rx_ring->count; 1178 1179 do { 1180 if (!ixgbe_alloc_mapped_page(rx_ring, bi)) 1181 break; 1182 1183 /* 1184 * Refresh the desc even if buffer_addrs didn't change 1185 * because each write-back erases this info. 1186 */ 1187 rx_desc->read.pkt_addr = cpu_to_le64(bi->dma + bi->page_offset); 1188 1189 rx_desc++; 1190 bi++; 1191 i++; 1192 if (unlikely(!i)) { 1193 rx_desc = IXGBE_RX_DESC(rx_ring, 0); 1194 bi = rx_ring->rx_buffer_info; 1195 i -= rx_ring->count; 1196 } 1197 1198 /* clear the hdr_addr for the next_to_use descriptor */ 1199 rx_desc->read.hdr_addr = 0; 1200 1201 cleaned_count--; 1202 } while (cleaned_count); 1203 1204 i += rx_ring->count; 1205 1206 if (rx_ring->next_to_use != i) 1207 ixgbe_release_rx_desc(rx_ring, i); 1208 } 1209 1210 /** 1211 * ixgbe_get_headlen - determine size of header for RSC/LRO/GRO/FCOE 1212 * @data: pointer to the start of the headers 1213 * @max_len: total length of section to find headers in 1214 * 1215 * This function is meant to determine the length of headers that will 1216 * be recognized by hardware for LRO, GRO, and RSC offloads. The main 1217 * motivation of doing this is to only perform one pull for IPv4 TCP 1218 * packets so that we can do basic things like calculating the gso_size 1219 * based on the average data per packet. 1220 **/ 1221 static unsigned int ixgbe_get_headlen(unsigned char *data, 1222 unsigned int max_len) 1223 { 1224 union { 1225 unsigned char *network; 1226 /* l2 headers */ 1227 struct ethhdr *eth; 1228 struct vlan_hdr *vlan; 1229 /* l3 headers */ 1230 struct iphdr *ipv4; 1231 } hdr; 1232 __be16 protocol; 1233 u8 nexthdr = 0; /* default to not TCP */ 1234 u8 hlen; 1235 1236 /* this should never happen, but better safe than sorry */ 1237 if (max_len < ETH_HLEN) 1238 return max_len; 1239 1240 /* initialize network frame pointer */ 1241 hdr.network = data; 1242 1243 /* set first protocol and move network header forward */ 1244 protocol = hdr.eth->h_proto; 1245 hdr.network += ETH_HLEN; 1246 1247 /* handle any vlan tag if present */ 1248 if (protocol == __constant_htons(ETH_P_8021Q)) { 1249 if ((hdr.network - data) > (max_len - VLAN_HLEN)) 1250 return max_len; 1251 1252 protocol = hdr.vlan->h_vlan_encapsulated_proto; 1253 hdr.network += VLAN_HLEN; 1254 } 1255 1256 /* handle L3 protocols */ 1257 if (protocol == __constant_htons(ETH_P_IP)) { 1258 if ((hdr.network - data) > (max_len - sizeof(struct iphdr))) 1259 return max_len; 1260 1261 /* access ihl as a u8 to avoid unaligned access on ia64 */ 1262 hlen = (hdr.network[0] & 0x0F) << 2; 1263 1264 /* verify hlen meets minimum size requirements */ 1265 if (hlen < sizeof(struct iphdr)) 1266 return hdr.network - data; 1267 1268 /* record next protocol */ 1269 nexthdr = hdr.ipv4->protocol; 1270 hdr.network += hlen; 1271 #ifdef IXGBE_FCOE 1272 } else if (protocol == __constant_htons(ETH_P_FCOE)) { 1273 if ((hdr.network - data) > (max_len - FCOE_HEADER_LEN)) 1274 return max_len; 1275 hdr.network += FCOE_HEADER_LEN; 1276 #endif 1277 } else { 1278 return hdr.network - data; 1279 } 1280 1281 /* finally sort out TCP */ 1282 if (nexthdr == IPPROTO_TCP) { 1283 if ((hdr.network - data) > (max_len - sizeof(struct tcphdr))) 1284 return max_len; 1285 1286 /* access doff as a u8 to avoid unaligned access on ia64 */ 1287 hlen = (hdr.network[12] & 0xF0) >> 2; 1288 1289 /* verify hlen meets minimum size requirements */ 1290 if (hlen < sizeof(struct tcphdr)) 1291 return hdr.network - data; 1292 1293 hdr.network += hlen; 1294 } 1295 1296 /* 1297 * If everything has gone correctly hdr.network should be the 1298 * data section of the packet and will be the end of the header. 1299 * If not then it probably represents the end of the last recognized 1300 * header. 1301 */ 1302 if ((hdr.network - data) < max_len) 1303 return hdr.network - data; 1304 else 1305 return max_len; 1306 } 1307 1308 static void ixgbe_get_rsc_cnt(struct ixgbe_ring *rx_ring, 1309 union ixgbe_adv_rx_desc *rx_desc, 1310 struct sk_buff *skb) 1311 { 1312 __le32 rsc_enabled; 1313 u32 rsc_cnt; 1314 1315 if (!ring_is_rsc_enabled(rx_ring)) 1316 return; 1317 1318 rsc_enabled = rx_desc->wb.lower.lo_dword.data & 1319 cpu_to_le32(IXGBE_RXDADV_RSCCNT_MASK); 1320 1321 /* If this is an RSC frame rsc_cnt should be non-zero */ 1322 if (!rsc_enabled) 1323 return; 1324 1325 rsc_cnt = le32_to_cpu(rsc_enabled); 1326 rsc_cnt >>= IXGBE_RXDADV_RSCCNT_SHIFT; 1327 1328 IXGBE_CB(skb)->append_cnt += rsc_cnt - 1; 1329 } 1330 1331 static void ixgbe_set_rsc_gso_size(struct ixgbe_ring *ring, 1332 struct sk_buff *skb) 1333 { 1334 u16 hdr_len = skb_headlen(skb); 1335 1336 /* set gso_size to avoid messing up TCP MSS */ 1337 skb_shinfo(skb)->gso_size = DIV_ROUND_UP((skb->len - hdr_len), 1338 IXGBE_CB(skb)->append_cnt); 1339 } 1340 1341 static void ixgbe_update_rsc_stats(struct ixgbe_ring *rx_ring, 1342 struct sk_buff *skb) 1343 { 1344 /* if append_cnt is 0 then frame is not RSC */ 1345 if (!IXGBE_CB(skb)->append_cnt) 1346 return; 1347 1348 rx_ring->rx_stats.rsc_count += IXGBE_CB(skb)->append_cnt; 1349 rx_ring->rx_stats.rsc_flush++; 1350 1351 ixgbe_set_rsc_gso_size(rx_ring, skb); 1352 1353 /* gso_size is computed using append_cnt so always clear it last */ 1354 IXGBE_CB(skb)->append_cnt = 0; 1355 } 1356 1357 /** 1358 * ixgbe_process_skb_fields - Populate skb header fields from Rx descriptor 1359 * @rx_ring: rx descriptor ring packet is being transacted on 1360 * @rx_desc: pointer to the EOP Rx descriptor 1361 * @skb: pointer to current skb being populated 1362 * 1363 * This function checks the ring, descriptor, and packet information in 1364 * order to populate the hash, checksum, VLAN, timestamp, protocol, and 1365 * other fields within the skb. 1366 **/ 1367 static void ixgbe_process_skb_fields(struct ixgbe_ring *rx_ring, 1368 union ixgbe_adv_rx_desc *rx_desc, 1369 struct sk_buff *skb) 1370 { 1371 ixgbe_update_rsc_stats(rx_ring, skb); 1372 1373 ixgbe_rx_hash(rx_ring, rx_desc, skb); 1374 1375 ixgbe_rx_checksum(rx_ring, rx_desc, skb); 1376 1377 if (ixgbe_test_staterr(rx_desc, IXGBE_RXD_STAT_VP)) { 1378 u16 vid = le16_to_cpu(rx_desc->wb.upper.vlan); 1379 __vlan_hwaccel_put_tag(skb, vid); 1380 } 1381 1382 skb_record_rx_queue(skb, rx_ring->queue_index); 1383 1384 skb->protocol = eth_type_trans(skb, rx_ring->netdev); 1385 } 1386 1387 static void ixgbe_rx_skb(struct ixgbe_q_vector *q_vector, 1388 struct sk_buff *skb) 1389 { 1390 struct ixgbe_adapter *adapter = q_vector->adapter; 1391 1392 if (!(adapter->flags & IXGBE_FLAG_IN_NETPOLL)) 1393 napi_gro_receive(&q_vector->napi, skb); 1394 else 1395 netif_rx(skb); 1396 } 1397 1398 /** 1399 * ixgbe_is_non_eop - process handling of non-EOP buffers 1400 * @rx_ring: Rx ring being processed 1401 * @rx_desc: Rx descriptor for current buffer 1402 * @skb: Current socket buffer containing buffer in progress 1403 * 1404 * This function updates next to clean. If the buffer is an EOP buffer 1405 * this function exits returning false, otherwise it will place the 1406 * sk_buff in the next buffer to be chained and return true indicating 1407 * that this is in fact a non-EOP buffer. 1408 **/ 1409 static bool ixgbe_is_non_eop(struct ixgbe_ring *rx_ring, 1410 union ixgbe_adv_rx_desc *rx_desc, 1411 struct sk_buff *skb) 1412 { 1413 u32 ntc = rx_ring->next_to_clean + 1; 1414 1415 /* fetch, update, and store next to clean */ 1416 ntc = (ntc < rx_ring->count) ? ntc : 0; 1417 rx_ring->next_to_clean = ntc; 1418 1419 prefetch(IXGBE_RX_DESC(rx_ring, ntc)); 1420 1421 if (likely(ixgbe_test_staterr(rx_desc, IXGBE_RXD_STAT_EOP))) 1422 return false; 1423 1424 /* append_cnt indicates packet is RSC, if so fetch nextp */ 1425 if (IXGBE_CB(skb)->append_cnt) { 1426 ntc = le32_to_cpu(rx_desc->wb.upper.status_error); 1427 ntc &= IXGBE_RXDADV_NEXTP_MASK; 1428 ntc >>= IXGBE_RXDADV_NEXTP_SHIFT; 1429 } 1430 1431 /* place skb in next buffer to be received */ 1432 rx_ring->rx_buffer_info[ntc].skb = skb; 1433 rx_ring->rx_stats.non_eop_descs++; 1434 1435 return true; 1436 } 1437 1438 /** 1439 * ixgbe_cleanup_headers - Correct corrupted or empty headers 1440 * @rx_ring: rx descriptor ring packet is being transacted on 1441 * @rx_desc: pointer to the EOP Rx descriptor 1442 * @skb: pointer to current skb being fixed 1443 * 1444 * Check for corrupted packet headers caused by senders on the local L2 1445 * embedded NIC switch not setting up their Tx Descriptors right. These 1446 * should be very rare. 1447 * 1448 * Also address the case where we are pulling data in on pages only 1449 * and as such no data is present in the skb header. 1450 * 1451 * In addition if skb is not at least 60 bytes we need to pad it so that 1452 * it is large enough to qualify as a valid Ethernet frame. 1453 * 1454 * Returns true if an error was encountered and skb was freed. 1455 **/ 1456 static bool ixgbe_cleanup_headers(struct ixgbe_ring *rx_ring, 1457 union ixgbe_adv_rx_desc *rx_desc, 1458 struct sk_buff *skb) 1459 { 1460 struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[0]; 1461 struct net_device *netdev = rx_ring->netdev; 1462 unsigned char *va; 1463 unsigned int pull_len; 1464 1465 /* if the page was released unmap it, else just sync our portion */ 1466 if (unlikely(IXGBE_CB(skb)->page_released)) { 1467 dma_unmap_page(rx_ring->dev, IXGBE_CB(skb)->dma, 1468 ixgbe_rx_pg_size(rx_ring), DMA_FROM_DEVICE); 1469 IXGBE_CB(skb)->page_released = false; 1470 } else { 1471 dma_sync_single_range_for_cpu(rx_ring->dev, 1472 IXGBE_CB(skb)->dma, 1473 frag->page_offset, 1474 ixgbe_rx_bufsz(rx_ring), 1475 DMA_FROM_DEVICE); 1476 } 1477 IXGBE_CB(skb)->dma = 0; 1478 1479 /* verify that the packet does not have any known errors */ 1480 if (unlikely(ixgbe_test_staterr(rx_desc, 1481 IXGBE_RXDADV_ERR_FRAME_ERR_MASK) && 1482 !(netdev->features & NETIF_F_RXALL))) { 1483 dev_kfree_skb_any(skb); 1484 return true; 1485 } 1486 1487 /* 1488 * it is valid to use page_address instead of kmap since we are 1489 * working with pages allocated out of the lomem pool per 1490 * alloc_page(GFP_ATOMIC) 1491 */ 1492 va = skb_frag_address(frag); 1493 1494 /* 1495 * we need the header to contain the greater of either ETH_HLEN or 1496 * 60 bytes if the skb->len is less than 60 for skb_pad. 1497 */ 1498 pull_len = skb_frag_size(frag); 1499 if (pull_len > 256) 1500 pull_len = ixgbe_get_headlen(va, pull_len); 1501 1502 /* align pull length to size of long to optimize memcpy performance */ 1503 skb_copy_to_linear_data(skb, va, ALIGN(pull_len, sizeof(long))); 1504 1505 /* update all of the pointers */ 1506 skb_frag_size_sub(frag, pull_len); 1507 frag->page_offset += pull_len; 1508 skb->data_len -= pull_len; 1509 skb->tail += pull_len; 1510 1511 /* 1512 * if we sucked the frag empty then we should free it, 1513 * if there are other frags here something is screwed up in hardware 1514 */ 1515 if (skb_frag_size(frag) == 0) { 1516 BUG_ON(skb_shinfo(skb)->nr_frags != 1); 1517 skb_shinfo(skb)->nr_frags = 0; 1518 __skb_frag_unref(frag); 1519 skb->truesize -= ixgbe_rx_bufsz(rx_ring); 1520 } 1521 1522 /* if skb_pad returns an error the skb was freed */ 1523 if (unlikely(skb->len < 60)) { 1524 int pad_len = 60 - skb->len; 1525 1526 if (skb_pad(skb, pad_len)) 1527 return true; 1528 __skb_put(skb, pad_len); 1529 } 1530 1531 return false; 1532 } 1533 1534 /** 1535 * ixgbe_can_reuse_page - determine if we can reuse a page 1536 * @rx_buffer: pointer to rx_buffer containing the page we want to reuse 1537 * 1538 * Returns true if page can be reused in another Rx buffer 1539 **/ 1540 static inline bool ixgbe_can_reuse_page(struct ixgbe_rx_buffer *rx_buffer) 1541 { 1542 struct page *page = rx_buffer->page; 1543 1544 /* if we are only owner of page and it is local we can reuse it */ 1545 return likely(page_count(page) == 1) && 1546 likely(page_to_nid(page) == numa_node_id()); 1547 } 1548 1549 /** 1550 * ixgbe_reuse_rx_page - page flip buffer and store it back on the ring 1551 * @rx_ring: rx descriptor ring to store buffers on 1552 * @old_buff: donor buffer to have page reused 1553 * 1554 * Syncronizes page for reuse by the adapter 1555 **/ 1556 static void ixgbe_reuse_rx_page(struct ixgbe_ring *rx_ring, 1557 struct ixgbe_rx_buffer *old_buff) 1558 { 1559 struct ixgbe_rx_buffer *new_buff; 1560 u16 nta = rx_ring->next_to_alloc; 1561 u16 bufsz = ixgbe_rx_bufsz(rx_ring); 1562 1563 new_buff = &rx_ring->rx_buffer_info[nta]; 1564 1565 /* update, and store next to alloc */ 1566 nta++; 1567 rx_ring->next_to_alloc = (nta < rx_ring->count) ? nta : 0; 1568 1569 /* transfer page from old buffer to new buffer */ 1570 new_buff->page = old_buff->page; 1571 new_buff->dma = old_buff->dma; 1572 1573 /* flip page offset to other buffer and store to new_buff */ 1574 new_buff->page_offset = old_buff->page_offset ^ bufsz; 1575 1576 /* sync the buffer for use by the device */ 1577 dma_sync_single_range_for_device(rx_ring->dev, new_buff->dma, 1578 new_buff->page_offset, bufsz, 1579 DMA_FROM_DEVICE); 1580 1581 /* bump ref count on page before it is given to the stack */ 1582 get_page(new_buff->page); 1583 } 1584 1585 /** 1586 * ixgbe_add_rx_frag - Add contents of Rx buffer to sk_buff 1587 * @rx_ring: rx descriptor ring to transact packets on 1588 * @rx_buffer: buffer containing page to add 1589 * @rx_desc: descriptor containing length of buffer written by hardware 1590 * @skb: sk_buff to place the data into 1591 * 1592 * This function is based on skb_add_rx_frag. I would have used that 1593 * function however it doesn't handle the truesize case correctly since we 1594 * are allocating more memory than might be used for a single receive. 1595 **/ 1596 static void ixgbe_add_rx_frag(struct ixgbe_ring *rx_ring, 1597 struct ixgbe_rx_buffer *rx_buffer, 1598 struct sk_buff *skb, int size) 1599 { 1600 skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags, 1601 rx_buffer->page, rx_buffer->page_offset, 1602 size); 1603 skb->len += size; 1604 skb->data_len += size; 1605 skb->truesize += ixgbe_rx_bufsz(rx_ring); 1606 } 1607 1608 /** 1609 * ixgbe_clean_rx_irq - Clean completed descriptors from Rx ring - bounce buf 1610 * @q_vector: structure containing interrupt and ring information 1611 * @rx_ring: rx descriptor ring to transact packets on 1612 * @budget: Total limit on number of packets to process 1613 * 1614 * This function provides a "bounce buffer" approach to Rx interrupt 1615 * processing. The advantage to this is that on systems that have 1616 * expensive overhead for IOMMU access this provides a means of avoiding 1617 * it by maintaining the mapping of the page to the syste. 1618 * 1619 * Returns true if all work is completed without reaching budget 1620 **/ 1621 static bool ixgbe_clean_rx_irq(struct ixgbe_q_vector *q_vector, 1622 struct ixgbe_ring *rx_ring, 1623 int budget) 1624 { 1625 unsigned int total_rx_bytes = 0, total_rx_packets = 0; 1626 #ifdef IXGBE_FCOE 1627 struct ixgbe_adapter *adapter = q_vector->adapter; 1628 int ddp_bytes = 0; 1629 #endif /* IXGBE_FCOE */ 1630 u16 cleaned_count = ixgbe_desc_unused(rx_ring); 1631 1632 do { 1633 struct ixgbe_rx_buffer *rx_buffer; 1634 union ixgbe_adv_rx_desc *rx_desc; 1635 struct sk_buff *skb; 1636 struct page *page; 1637 u16 ntc; 1638 1639 /* return some buffers to hardware, one at a time is too slow */ 1640 if (cleaned_count >= IXGBE_RX_BUFFER_WRITE) { 1641 ixgbe_alloc_rx_buffers(rx_ring, cleaned_count); 1642 cleaned_count = 0; 1643 } 1644 1645 ntc = rx_ring->next_to_clean; 1646 rx_desc = IXGBE_RX_DESC(rx_ring, ntc); 1647 rx_buffer = &rx_ring->rx_buffer_info[ntc]; 1648 1649 if (!ixgbe_test_staterr(rx_desc, IXGBE_RXD_STAT_DD)) 1650 break; 1651 1652 /* 1653 * This memory barrier is needed to keep us from reading 1654 * any other fields out of the rx_desc until we know the 1655 * RXD_STAT_DD bit is set 1656 */ 1657 rmb(); 1658 1659 page = rx_buffer->page; 1660 prefetchw(page); 1661 1662 skb = rx_buffer->skb; 1663 1664 if (likely(!skb)) { 1665 void *page_addr = page_address(page) + 1666 rx_buffer->page_offset; 1667 1668 /* prefetch first cache line of first page */ 1669 prefetch(page_addr); 1670 #if L1_CACHE_BYTES < 128 1671 prefetch(page_addr + L1_CACHE_BYTES); 1672 #endif 1673 1674 /* allocate a skb to store the frags */ 1675 skb = netdev_alloc_skb_ip_align(rx_ring->netdev, 1676 IXGBE_RX_HDR_SIZE); 1677 if (unlikely(!skb)) { 1678 rx_ring->rx_stats.alloc_rx_buff_failed++; 1679 break; 1680 } 1681 1682 /* 1683 * we will be copying header into skb->data in 1684 * pskb_may_pull so it is in our interest to prefetch 1685 * it now to avoid a possible cache miss 1686 */ 1687 prefetchw(skb->data); 1688 1689 /* 1690 * Delay unmapping of the first packet. It carries the 1691 * header information, HW may still access the header 1692 * after the writeback. Only unmap it when EOP is 1693 * reached 1694 */ 1695 IXGBE_CB(skb)->dma = rx_buffer->dma; 1696 } else { 1697 /* we are reusing so sync this buffer for CPU use */ 1698 dma_sync_single_range_for_cpu(rx_ring->dev, 1699 rx_buffer->dma, 1700 rx_buffer->page_offset, 1701 ixgbe_rx_bufsz(rx_ring), 1702 DMA_FROM_DEVICE); 1703 } 1704 1705 /* pull page into skb */ 1706 ixgbe_add_rx_frag(rx_ring, rx_buffer, skb, 1707 le16_to_cpu(rx_desc->wb.upper.length)); 1708 1709 if (ixgbe_can_reuse_page(rx_buffer)) { 1710 /* hand second half of page back to the ring */ 1711 ixgbe_reuse_rx_page(rx_ring, rx_buffer); 1712 } else if (IXGBE_CB(skb)->dma == rx_buffer->dma) { 1713 /* the page has been released from the ring */ 1714 IXGBE_CB(skb)->page_released = true; 1715 } else { 1716 /* we are not reusing the buffer so unmap it */ 1717 dma_unmap_page(rx_ring->dev, rx_buffer->dma, 1718 ixgbe_rx_pg_size(rx_ring), 1719 DMA_FROM_DEVICE); 1720 } 1721 1722 /* clear contents of buffer_info */ 1723 rx_buffer->skb = NULL; 1724 rx_buffer->dma = 0; 1725 rx_buffer->page = NULL; 1726 1727 ixgbe_get_rsc_cnt(rx_ring, rx_desc, skb); 1728 1729 cleaned_count++; 1730 1731 /* place incomplete frames back on ring for completion */ 1732 if (ixgbe_is_non_eop(rx_ring, rx_desc, skb)) 1733 continue; 1734 1735 /* verify the packet layout is correct */ 1736 if (ixgbe_cleanup_headers(rx_ring, rx_desc, skb)) 1737 continue; 1738 1739 /* probably a little skewed due to removing CRC */ 1740 total_rx_bytes += skb->len; 1741 total_rx_packets++; 1742 1743 /* populate checksum, timestamp, VLAN, and protocol */ 1744 ixgbe_process_skb_fields(rx_ring, rx_desc, skb); 1745 1746 #ifdef IXGBE_FCOE 1747 /* if ddp, not passing to ULD unless for FCP_RSP or error */ 1748 if (ixgbe_rx_is_fcoe(adapter, rx_desc)) { 1749 ddp_bytes = ixgbe_fcoe_ddp(adapter, rx_desc, skb); 1750 if (!ddp_bytes) { 1751 dev_kfree_skb_any(skb); 1752 continue; 1753 } 1754 } 1755 1756 #endif /* IXGBE_FCOE */ 1757 ixgbe_rx_skb(q_vector, skb); 1758 1759 /* update budget accounting */ 1760 budget--; 1761 } while (likely(budget)); 1762 1763 #ifdef IXGBE_FCOE 1764 /* include DDPed FCoE data */ 1765 if (ddp_bytes > 0) { 1766 unsigned int mss; 1767 1768 mss = rx_ring->netdev->mtu - sizeof(struct fcoe_hdr) - 1769 sizeof(struct fc_frame_header) - 1770 sizeof(struct fcoe_crc_eof); 1771 if (mss > 512) 1772 mss &= ~511; 1773 total_rx_bytes += ddp_bytes; 1774 total_rx_packets += DIV_ROUND_UP(ddp_bytes, mss); 1775 } 1776 1777 #endif /* IXGBE_FCOE */ 1778 u64_stats_update_begin(&rx_ring->syncp); 1779 rx_ring->stats.packets += total_rx_packets; 1780 rx_ring->stats.bytes += total_rx_bytes; 1781 u64_stats_update_end(&rx_ring->syncp); 1782 q_vector->rx.total_packets += total_rx_packets; 1783 q_vector->rx.total_bytes += total_rx_bytes; 1784 1785 if (cleaned_count) 1786 ixgbe_alloc_rx_buffers(rx_ring, cleaned_count); 1787 1788 return !!budget; 1789 } 1790 1791 /** 1792 * ixgbe_configure_msix - Configure MSI-X hardware 1793 * @adapter: board private structure 1794 * 1795 * ixgbe_configure_msix sets up the hardware to properly generate MSI-X 1796 * interrupts. 1797 **/ 1798 static void ixgbe_configure_msix(struct ixgbe_adapter *adapter) 1799 { 1800 struct ixgbe_q_vector *q_vector; 1801 int q_vectors, v_idx; 1802 u32 mask; 1803 1804 q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS; 1805 1806 /* Populate MSIX to EITR Select */ 1807 if (adapter->num_vfs > 32) { 1808 u32 eitrsel = (1 << (adapter->num_vfs - 32)) - 1; 1809 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EITRSEL, eitrsel); 1810 } 1811 1812 /* 1813 * Populate the IVAR table and set the ITR values to the 1814 * corresponding register. 1815 */ 1816 for (v_idx = 0; v_idx < q_vectors; v_idx++) { 1817 struct ixgbe_ring *ring; 1818 q_vector = adapter->q_vector[v_idx]; 1819 1820 ixgbe_for_each_ring(ring, q_vector->rx) 1821 ixgbe_set_ivar(adapter, 0, ring->reg_idx, v_idx); 1822 1823 ixgbe_for_each_ring(ring, q_vector->tx) 1824 ixgbe_set_ivar(adapter, 1, ring->reg_idx, v_idx); 1825 1826 if (q_vector->tx.ring && !q_vector->rx.ring) { 1827 /* tx only vector */ 1828 if (adapter->tx_itr_setting == 1) 1829 q_vector->itr = IXGBE_10K_ITR; 1830 else 1831 q_vector->itr = adapter->tx_itr_setting; 1832 } else { 1833 /* rx or rx/tx vector */ 1834 if (adapter->rx_itr_setting == 1) 1835 q_vector->itr = IXGBE_20K_ITR; 1836 else 1837 q_vector->itr = adapter->rx_itr_setting; 1838 } 1839 1840 ixgbe_write_eitr(q_vector); 1841 } 1842 1843 switch (adapter->hw.mac.type) { 1844 case ixgbe_mac_82598EB: 1845 ixgbe_set_ivar(adapter, -1, IXGBE_IVAR_OTHER_CAUSES_INDEX, 1846 v_idx); 1847 break; 1848 case ixgbe_mac_82599EB: 1849 case ixgbe_mac_X540: 1850 ixgbe_set_ivar(adapter, -1, 1, v_idx); 1851 break; 1852 default: 1853 break; 1854 } 1855 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EITR(v_idx), 1950); 1856 1857 /* set up to autoclear timer, and the vectors */ 1858 mask = IXGBE_EIMS_ENABLE_MASK; 1859 mask &= ~(IXGBE_EIMS_OTHER | 1860 IXGBE_EIMS_MAILBOX | 1861 IXGBE_EIMS_LSC); 1862 1863 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIAC, mask); 1864 } 1865 1866 enum latency_range { 1867 lowest_latency = 0, 1868 low_latency = 1, 1869 bulk_latency = 2, 1870 latency_invalid = 255 1871 }; 1872 1873 /** 1874 * ixgbe_update_itr - update the dynamic ITR value based on statistics 1875 * @q_vector: structure containing interrupt and ring information 1876 * @ring_container: structure containing ring performance data 1877 * 1878 * Stores a new ITR value based on packets and byte 1879 * counts during the last interrupt. The advantage of per interrupt 1880 * computation is faster updates and more accurate ITR for the current 1881 * traffic pattern. Constants in this function were computed 1882 * based on theoretical maximum wire speed and thresholds were set based 1883 * on testing data as well as attempting to minimize response time 1884 * while increasing bulk throughput. 1885 * this functionality is controlled by the InterruptThrottleRate module 1886 * parameter (see ixgbe_param.c) 1887 **/ 1888 static void ixgbe_update_itr(struct ixgbe_q_vector *q_vector, 1889 struct ixgbe_ring_container *ring_container) 1890 { 1891 int bytes = ring_container->total_bytes; 1892 int packets = ring_container->total_packets; 1893 u32 timepassed_us; 1894 u64 bytes_perint; 1895 u8 itr_setting = ring_container->itr; 1896 1897 if (packets == 0) 1898 return; 1899 1900 /* simple throttlerate management 1901 * 0-10MB/s lowest (100000 ints/s) 1902 * 10-20MB/s low (20000 ints/s) 1903 * 20-1249MB/s bulk (8000 ints/s) 1904 */ 1905 /* what was last interrupt timeslice? */ 1906 timepassed_us = q_vector->itr >> 2; 1907 bytes_perint = bytes / timepassed_us; /* bytes/usec */ 1908 1909 switch (itr_setting) { 1910 case lowest_latency: 1911 if (bytes_perint > 10) 1912 itr_setting = low_latency; 1913 break; 1914 case low_latency: 1915 if (bytes_perint > 20) 1916 itr_setting = bulk_latency; 1917 else if (bytes_perint <= 10) 1918 itr_setting = lowest_latency; 1919 break; 1920 case bulk_latency: 1921 if (bytes_perint <= 20) 1922 itr_setting = low_latency; 1923 break; 1924 } 1925 1926 /* clear work counters since we have the values we need */ 1927 ring_container->total_bytes = 0; 1928 ring_container->total_packets = 0; 1929 1930 /* write updated itr to ring container */ 1931 ring_container->itr = itr_setting; 1932 } 1933 1934 /** 1935 * ixgbe_write_eitr - write EITR register in hardware specific way 1936 * @q_vector: structure containing interrupt and ring information 1937 * 1938 * This function is made to be called by ethtool and by the driver 1939 * when it needs to update EITR registers at runtime. Hardware 1940 * specific quirks/differences are taken care of here. 1941 */ 1942 void ixgbe_write_eitr(struct ixgbe_q_vector *q_vector) 1943 { 1944 struct ixgbe_adapter *adapter = q_vector->adapter; 1945 struct ixgbe_hw *hw = &adapter->hw; 1946 int v_idx = q_vector->v_idx; 1947 u32 itr_reg = q_vector->itr & IXGBE_MAX_EITR; 1948 1949 switch (adapter->hw.mac.type) { 1950 case ixgbe_mac_82598EB: 1951 /* must write high and low 16 bits to reset counter */ 1952 itr_reg |= (itr_reg << 16); 1953 break; 1954 case ixgbe_mac_82599EB: 1955 case ixgbe_mac_X540: 1956 /* 1957 * set the WDIS bit to not clear the timer bits and cause an 1958 * immediate assertion of the interrupt 1959 */ 1960 itr_reg |= IXGBE_EITR_CNT_WDIS; 1961 break; 1962 default: 1963 break; 1964 } 1965 IXGBE_WRITE_REG(hw, IXGBE_EITR(v_idx), itr_reg); 1966 } 1967 1968 static void ixgbe_set_itr(struct ixgbe_q_vector *q_vector) 1969 { 1970 u32 new_itr = q_vector->itr; 1971 u8 current_itr; 1972 1973 ixgbe_update_itr(q_vector, &q_vector->tx); 1974 ixgbe_update_itr(q_vector, &q_vector->rx); 1975 1976 current_itr = max(q_vector->rx.itr, q_vector->tx.itr); 1977 1978 switch (current_itr) { 1979 /* counts and packets in update_itr are dependent on these numbers */ 1980 case lowest_latency: 1981 new_itr = IXGBE_100K_ITR; 1982 break; 1983 case low_latency: 1984 new_itr = IXGBE_20K_ITR; 1985 break; 1986 case bulk_latency: 1987 new_itr = IXGBE_8K_ITR; 1988 break; 1989 default: 1990 break; 1991 } 1992 1993 if (new_itr != q_vector->itr) { 1994 /* do an exponential smoothing */ 1995 new_itr = (10 * new_itr * q_vector->itr) / 1996 ((9 * new_itr) + q_vector->itr); 1997 1998 /* save the algorithm value here */ 1999 q_vector->itr = new_itr; 2000 2001 ixgbe_write_eitr(q_vector); 2002 } 2003 } 2004 2005 /** 2006 * ixgbe_check_overtemp_subtask - check for over temperature 2007 * @adapter: pointer to adapter 2008 **/ 2009 static void ixgbe_check_overtemp_subtask(struct ixgbe_adapter *adapter) 2010 { 2011 struct ixgbe_hw *hw = &adapter->hw; 2012 u32 eicr = adapter->interrupt_event; 2013 2014 if (test_bit(__IXGBE_DOWN, &adapter->state)) 2015 return; 2016 2017 if (!(adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE) && 2018 !(adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_EVENT)) 2019 return; 2020 2021 adapter->flags2 &= ~IXGBE_FLAG2_TEMP_SENSOR_EVENT; 2022 2023 switch (hw->device_id) { 2024 case IXGBE_DEV_ID_82599_T3_LOM: 2025 /* 2026 * Since the warning interrupt is for both ports 2027 * we don't have to check if: 2028 * - This interrupt wasn't for our port. 2029 * - We may have missed the interrupt so always have to 2030 * check if we got a LSC 2031 */ 2032 if (!(eicr & IXGBE_EICR_GPI_SDP0) && 2033 !(eicr & IXGBE_EICR_LSC)) 2034 return; 2035 2036 if (!(eicr & IXGBE_EICR_LSC) && hw->mac.ops.check_link) { 2037 u32 autoneg; 2038 bool link_up = false; 2039 2040 hw->mac.ops.check_link(hw, &autoneg, &link_up, false); 2041 2042 if (link_up) 2043 return; 2044 } 2045 2046 /* Check if this is not due to overtemp */ 2047 if (hw->phy.ops.check_overtemp(hw) != IXGBE_ERR_OVERTEMP) 2048 return; 2049 2050 break; 2051 default: 2052 if (!(eicr & IXGBE_EICR_GPI_SDP0)) 2053 return; 2054 break; 2055 } 2056 e_crit(drv, 2057 "Network adapter has been stopped because it has over heated. " 2058 "Restart the computer. If the problem persists, " 2059 "power off the system and replace the adapter\n"); 2060 2061 adapter->interrupt_event = 0; 2062 } 2063 2064 static void ixgbe_check_fan_failure(struct ixgbe_adapter *adapter, u32 eicr) 2065 { 2066 struct ixgbe_hw *hw = &adapter->hw; 2067 2068 if ((adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) && 2069 (eicr & IXGBE_EICR_GPI_SDP1)) { 2070 e_crit(probe, "Fan has stopped, replace the adapter\n"); 2071 /* write to clear the interrupt */ 2072 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP1); 2073 } 2074 } 2075 2076 static void ixgbe_check_overtemp_event(struct ixgbe_adapter *adapter, u32 eicr) 2077 { 2078 if (!(adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE)) 2079 return; 2080 2081 switch (adapter->hw.mac.type) { 2082 case ixgbe_mac_82599EB: 2083 /* 2084 * Need to check link state so complete overtemp check 2085 * on service task 2086 */ 2087 if (((eicr & IXGBE_EICR_GPI_SDP0) || (eicr & IXGBE_EICR_LSC)) && 2088 (!test_bit(__IXGBE_DOWN, &adapter->state))) { 2089 adapter->interrupt_event = eicr; 2090 adapter->flags2 |= IXGBE_FLAG2_TEMP_SENSOR_EVENT; 2091 ixgbe_service_event_schedule(adapter); 2092 return; 2093 } 2094 return; 2095 case ixgbe_mac_X540: 2096 if (!(eicr & IXGBE_EICR_TS)) 2097 return; 2098 break; 2099 default: 2100 return; 2101 } 2102 2103 e_crit(drv, 2104 "Network adapter has been stopped because it has over heated. " 2105 "Restart the computer. If the problem persists, " 2106 "power off the system and replace the adapter\n"); 2107 } 2108 2109 static void ixgbe_check_sfp_event(struct ixgbe_adapter *adapter, u32 eicr) 2110 { 2111 struct ixgbe_hw *hw = &adapter->hw; 2112 2113 if (eicr & IXGBE_EICR_GPI_SDP2) { 2114 /* Clear the interrupt */ 2115 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP2); 2116 if (!test_bit(__IXGBE_DOWN, &adapter->state)) { 2117 adapter->flags2 |= IXGBE_FLAG2_SFP_NEEDS_RESET; 2118 ixgbe_service_event_schedule(adapter); 2119 } 2120 } 2121 2122 if (eicr & IXGBE_EICR_GPI_SDP1) { 2123 /* Clear the interrupt */ 2124 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP1); 2125 if (!test_bit(__IXGBE_DOWN, &adapter->state)) { 2126 adapter->flags |= IXGBE_FLAG_NEED_LINK_CONFIG; 2127 ixgbe_service_event_schedule(adapter); 2128 } 2129 } 2130 } 2131 2132 static void ixgbe_check_lsc(struct ixgbe_adapter *adapter) 2133 { 2134 struct ixgbe_hw *hw = &adapter->hw; 2135 2136 adapter->lsc_int++; 2137 adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE; 2138 adapter->link_check_timeout = jiffies; 2139 if (!test_bit(__IXGBE_DOWN, &adapter->state)) { 2140 IXGBE_WRITE_REG(hw, IXGBE_EIMC, IXGBE_EIMC_LSC); 2141 IXGBE_WRITE_FLUSH(hw); 2142 ixgbe_service_event_schedule(adapter); 2143 } 2144 } 2145 2146 static inline void ixgbe_irq_enable_queues(struct ixgbe_adapter *adapter, 2147 u64 qmask) 2148 { 2149 u32 mask; 2150 struct ixgbe_hw *hw = &adapter->hw; 2151 2152 switch (hw->mac.type) { 2153 case ixgbe_mac_82598EB: 2154 mask = (IXGBE_EIMS_RTX_QUEUE & qmask); 2155 IXGBE_WRITE_REG(hw, IXGBE_EIMS, mask); 2156 break; 2157 case ixgbe_mac_82599EB: 2158 case ixgbe_mac_X540: 2159 mask = (qmask & 0xFFFFFFFF); 2160 if (mask) 2161 IXGBE_WRITE_REG(hw, IXGBE_EIMS_EX(0), mask); 2162 mask = (qmask >> 32); 2163 if (mask) 2164 IXGBE_WRITE_REG(hw, IXGBE_EIMS_EX(1), mask); 2165 break; 2166 default: 2167 break; 2168 } 2169 /* skip the flush */ 2170 } 2171 2172 static inline void ixgbe_irq_disable_queues(struct ixgbe_adapter *adapter, 2173 u64 qmask) 2174 { 2175 u32 mask; 2176 struct ixgbe_hw *hw = &adapter->hw; 2177 2178 switch (hw->mac.type) { 2179 case ixgbe_mac_82598EB: 2180 mask = (IXGBE_EIMS_RTX_QUEUE & qmask); 2181 IXGBE_WRITE_REG(hw, IXGBE_EIMC, mask); 2182 break; 2183 case ixgbe_mac_82599EB: 2184 case ixgbe_mac_X540: 2185 mask = (qmask & 0xFFFFFFFF); 2186 if (mask) 2187 IXGBE_WRITE_REG(hw, IXGBE_EIMC_EX(0), mask); 2188 mask = (qmask >> 32); 2189 if (mask) 2190 IXGBE_WRITE_REG(hw, IXGBE_EIMC_EX(1), mask); 2191 break; 2192 default: 2193 break; 2194 } 2195 /* skip the flush */ 2196 } 2197 2198 /** 2199 * ixgbe_irq_enable - Enable default interrupt generation settings 2200 * @adapter: board private structure 2201 **/ 2202 static inline void ixgbe_irq_enable(struct ixgbe_adapter *adapter, bool queues, 2203 bool flush) 2204 { 2205 u32 mask = (IXGBE_EIMS_ENABLE_MASK & ~IXGBE_EIMS_RTX_QUEUE); 2206 2207 /* don't reenable LSC while waiting for link */ 2208 if (adapter->flags & IXGBE_FLAG_NEED_LINK_UPDATE) 2209 mask &= ~IXGBE_EIMS_LSC; 2210 2211 if (adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE) 2212 switch (adapter->hw.mac.type) { 2213 case ixgbe_mac_82599EB: 2214 mask |= IXGBE_EIMS_GPI_SDP0; 2215 break; 2216 case ixgbe_mac_X540: 2217 mask |= IXGBE_EIMS_TS; 2218 break; 2219 default: 2220 break; 2221 } 2222 if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) 2223 mask |= IXGBE_EIMS_GPI_SDP1; 2224 switch (adapter->hw.mac.type) { 2225 case ixgbe_mac_82599EB: 2226 mask |= IXGBE_EIMS_GPI_SDP1; 2227 mask |= IXGBE_EIMS_GPI_SDP2; 2228 case ixgbe_mac_X540: 2229 mask |= IXGBE_EIMS_ECC; 2230 mask |= IXGBE_EIMS_MAILBOX; 2231 break; 2232 default: 2233 break; 2234 } 2235 if ((adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) && 2236 !(adapter->flags2 & IXGBE_FLAG2_FDIR_REQUIRES_REINIT)) 2237 mask |= IXGBE_EIMS_FLOW_DIR; 2238 2239 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS, mask); 2240 if (queues) 2241 ixgbe_irq_enable_queues(adapter, ~0); 2242 if (flush) 2243 IXGBE_WRITE_FLUSH(&adapter->hw); 2244 } 2245 2246 static irqreturn_t ixgbe_msix_other(int irq, void *data) 2247 { 2248 struct ixgbe_adapter *adapter = data; 2249 struct ixgbe_hw *hw = &adapter->hw; 2250 u32 eicr; 2251 2252 /* 2253 * Workaround for Silicon errata. Use clear-by-write instead 2254 * of clear-by-read. Reading with EICS will return the 2255 * interrupt causes without clearing, which later be done 2256 * with the write to EICR. 2257 */ 2258 eicr = IXGBE_READ_REG(hw, IXGBE_EICS); 2259 IXGBE_WRITE_REG(hw, IXGBE_EICR, eicr); 2260 2261 if (eicr & IXGBE_EICR_LSC) 2262 ixgbe_check_lsc(adapter); 2263 2264 if (eicr & IXGBE_EICR_MAILBOX) 2265 ixgbe_msg_task(adapter); 2266 2267 switch (hw->mac.type) { 2268 case ixgbe_mac_82599EB: 2269 case ixgbe_mac_X540: 2270 if (eicr & IXGBE_EICR_ECC) 2271 e_info(link, "Received unrecoverable ECC Err, please " 2272 "reboot\n"); 2273 /* Handle Flow Director Full threshold interrupt */ 2274 if (eicr & IXGBE_EICR_FLOW_DIR) { 2275 int reinit_count = 0; 2276 int i; 2277 for (i = 0; i < adapter->num_tx_queues; i++) { 2278 struct ixgbe_ring *ring = adapter->tx_ring[i]; 2279 if (test_and_clear_bit(__IXGBE_TX_FDIR_INIT_DONE, 2280 &ring->state)) 2281 reinit_count++; 2282 } 2283 if (reinit_count) { 2284 /* no more flow director interrupts until after init */ 2285 IXGBE_WRITE_REG(hw, IXGBE_EIMC, IXGBE_EIMC_FLOW_DIR); 2286 adapter->flags2 |= IXGBE_FLAG2_FDIR_REQUIRES_REINIT; 2287 ixgbe_service_event_schedule(adapter); 2288 } 2289 } 2290 ixgbe_check_sfp_event(adapter, eicr); 2291 ixgbe_check_overtemp_event(adapter, eicr); 2292 break; 2293 default: 2294 break; 2295 } 2296 2297 ixgbe_check_fan_failure(adapter, eicr); 2298 2299 /* re-enable the original interrupt state, no lsc, no queues */ 2300 if (!test_bit(__IXGBE_DOWN, &adapter->state)) 2301 ixgbe_irq_enable(adapter, false, false); 2302 2303 return IRQ_HANDLED; 2304 } 2305 2306 static irqreturn_t ixgbe_msix_clean_rings(int irq, void *data) 2307 { 2308 struct ixgbe_q_vector *q_vector = data; 2309 2310 /* EIAM disabled interrupts (on this vector) for us */ 2311 2312 if (q_vector->rx.ring || q_vector->tx.ring) 2313 napi_schedule(&q_vector->napi); 2314 2315 return IRQ_HANDLED; 2316 } 2317 2318 /** 2319 * ixgbe_poll - NAPI Rx polling callback 2320 * @napi: structure for representing this polling device 2321 * @budget: how many packets driver is allowed to clean 2322 * 2323 * This function is used for legacy and MSI, NAPI mode 2324 **/ 2325 int ixgbe_poll(struct napi_struct *napi, int budget) 2326 { 2327 struct ixgbe_q_vector *q_vector = 2328 container_of(napi, struct ixgbe_q_vector, napi); 2329 struct ixgbe_adapter *adapter = q_vector->adapter; 2330 struct ixgbe_ring *ring; 2331 int per_ring_budget; 2332 bool clean_complete = true; 2333 2334 #ifdef CONFIG_IXGBE_DCA 2335 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) 2336 ixgbe_update_dca(q_vector); 2337 #endif 2338 2339 ixgbe_for_each_ring(ring, q_vector->tx) 2340 clean_complete &= !!ixgbe_clean_tx_irq(q_vector, ring); 2341 2342 /* attempt to distribute budget to each queue fairly, but don't allow 2343 * the budget to go below 1 because we'll exit polling */ 2344 if (q_vector->rx.count > 1) 2345 per_ring_budget = max(budget/q_vector->rx.count, 1); 2346 else 2347 per_ring_budget = budget; 2348 2349 ixgbe_for_each_ring(ring, q_vector->rx) 2350 clean_complete &= ixgbe_clean_rx_irq(q_vector, ring, 2351 per_ring_budget); 2352 2353 /* If all work not completed, return budget and keep polling */ 2354 if (!clean_complete) 2355 return budget; 2356 2357 /* all work done, exit the polling mode */ 2358 napi_complete(napi); 2359 if (adapter->rx_itr_setting & 1) 2360 ixgbe_set_itr(q_vector); 2361 if (!test_bit(__IXGBE_DOWN, &adapter->state)) 2362 ixgbe_irq_enable_queues(adapter, ((u64)1 << q_vector->v_idx)); 2363 2364 return 0; 2365 } 2366 2367 /** 2368 * ixgbe_request_msix_irqs - Initialize MSI-X interrupts 2369 * @adapter: board private structure 2370 * 2371 * ixgbe_request_msix_irqs allocates MSI-X vectors and requests 2372 * interrupts from the kernel. 2373 **/ 2374 static int ixgbe_request_msix_irqs(struct ixgbe_adapter *adapter) 2375 { 2376 struct net_device *netdev = adapter->netdev; 2377 int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS; 2378 int vector, err; 2379 int ri = 0, ti = 0; 2380 2381 for (vector = 0; vector < q_vectors; vector++) { 2382 struct ixgbe_q_vector *q_vector = adapter->q_vector[vector]; 2383 struct msix_entry *entry = &adapter->msix_entries[vector]; 2384 2385 if (q_vector->tx.ring && q_vector->rx.ring) { 2386 snprintf(q_vector->name, sizeof(q_vector->name) - 1, 2387 "%s-%s-%d", netdev->name, "TxRx", ri++); 2388 ti++; 2389 } else if (q_vector->rx.ring) { 2390 snprintf(q_vector->name, sizeof(q_vector->name) - 1, 2391 "%s-%s-%d", netdev->name, "rx", ri++); 2392 } else if (q_vector->tx.ring) { 2393 snprintf(q_vector->name, sizeof(q_vector->name) - 1, 2394 "%s-%s-%d", netdev->name, "tx", ti++); 2395 } else { 2396 /* skip this unused q_vector */ 2397 continue; 2398 } 2399 err = request_irq(entry->vector, &ixgbe_msix_clean_rings, 0, 2400 q_vector->name, q_vector); 2401 if (err) { 2402 e_err(probe, "request_irq failed for MSIX interrupt " 2403 "Error: %d\n", err); 2404 goto free_queue_irqs; 2405 } 2406 /* If Flow Director is enabled, set interrupt affinity */ 2407 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) { 2408 /* assign the mask for this irq */ 2409 irq_set_affinity_hint(entry->vector, 2410 &q_vector->affinity_mask); 2411 } 2412 } 2413 2414 err = request_irq(adapter->msix_entries[vector].vector, 2415 ixgbe_msix_other, 0, netdev->name, adapter); 2416 if (err) { 2417 e_err(probe, "request_irq for msix_other failed: %d\n", err); 2418 goto free_queue_irqs; 2419 } 2420 2421 return 0; 2422 2423 free_queue_irqs: 2424 while (vector) { 2425 vector--; 2426 irq_set_affinity_hint(adapter->msix_entries[vector].vector, 2427 NULL); 2428 free_irq(adapter->msix_entries[vector].vector, 2429 adapter->q_vector[vector]); 2430 } 2431 adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED; 2432 pci_disable_msix(adapter->pdev); 2433 kfree(adapter->msix_entries); 2434 adapter->msix_entries = NULL; 2435 return err; 2436 } 2437 2438 /** 2439 * ixgbe_intr - legacy mode Interrupt Handler 2440 * @irq: interrupt number 2441 * @data: pointer to a network interface device structure 2442 **/ 2443 static irqreturn_t ixgbe_intr(int irq, void *data) 2444 { 2445 struct ixgbe_adapter *adapter = data; 2446 struct ixgbe_hw *hw = &adapter->hw; 2447 struct ixgbe_q_vector *q_vector = adapter->q_vector[0]; 2448 u32 eicr; 2449 2450 /* 2451 * Workaround for silicon errata #26 on 82598. Mask the interrupt 2452 * before the read of EICR. 2453 */ 2454 IXGBE_WRITE_REG(hw, IXGBE_EIMC, IXGBE_IRQ_CLEAR_MASK); 2455 2456 /* for NAPI, using EIAM to auto-mask tx/rx interrupt bits on read 2457 * therefore no explicit interrupt disable is necessary */ 2458 eicr = IXGBE_READ_REG(hw, IXGBE_EICR); 2459 if (!eicr) { 2460 /* 2461 * shared interrupt alert! 2462 * make sure interrupts are enabled because the read will 2463 * have disabled interrupts due to EIAM 2464 * finish the workaround of silicon errata on 82598. Unmask 2465 * the interrupt that we masked before the EICR read. 2466 */ 2467 if (!test_bit(__IXGBE_DOWN, &adapter->state)) 2468 ixgbe_irq_enable(adapter, true, true); 2469 return IRQ_NONE; /* Not our interrupt */ 2470 } 2471 2472 if (eicr & IXGBE_EICR_LSC) 2473 ixgbe_check_lsc(adapter); 2474 2475 switch (hw->mac.type) { 2476 case ixgbe_mac_82599EB: 2477 ixgbe_check_sfp_event(adapter, eicr); 2478 /* Fall through */ 2479 case ixgbe_mac_X540: 2480 if (eicr & IXGBE_EICR_ECC) 2481 e_info(link, "Received unrecoverable ECC err, please " 2482 "reboot\n"); 2483 ixgbe_check_overtemp_event(adapter, eicr); 2484 break; 2485 default: 2486 break; 2487 } 2488 2489 ixgbe_check_fan_failure(adapter, eicr); 2490 2491 /* would disable interrupts here but EIAM disabled it */ 2492 napi_schedule(&q_vector->napi); 2493 2494 /* 2495 * re-enable link(maybe) and non-queue interrupts, no flush. 2496 * ixgbe_poll will re-enable the queue interrupts 2497 */ 2498 if (!test_bit(__IXGBE_DOWN, &adapter->state)) 2499 ixgbe_irq_enable(adapter, false, false); 2500 2501 return IRQ_HANDLED; 2502 } 2503 2504 /** 2505 * ixgbe_request_irq - initialize interrupts 2506 * @adapter: board private structure 2507 * 2508 * Attempts to configure interrupts using the best available 2509 * capabilities of the hardware and kernel. 2510 **/ 2511 static int ixgbe_request_irq(struct ixgbe_adapter *adapter) 2512 { 2513 struct net_device *netdev = adapter->netdev; 2514 int err; 2515 2516 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) 2517 err = ixgbe_request_msix_irqs(adapter); 2518 else if (adapter->flags & IXGBE_FLAG_MSI_ENABLED) 2519 err = request_irq(adapter->pdev->irq, ixgbe_intr, 0, 2520 netdev->name, adapter); 2521 else 2522 err = request_irq(adapter->pdev->irq, ixgbe_intr, IRQF_SHARED, 2523 netdev->name, adapter); 2524 2525 if (err) 2526 e_err(probe, "request_irq failed, Error %d\n", err); 2527 2528 return err; 2529 } 2530 2531 static void ixgbe_free_irq(struct ixgbe_adapter *adapter) 2532 { 2533 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) { 2534 int i, q_vectors; 2535 2536 q_vectors = adapter->num_msix_vectors; 2537 i = q_vectors - 1; 2538 free_irq(adapter->msix_entries[i].vector, adapter); 2539 i--; 2540 2541 for (; i >= 0; i--) { 2542 /* free only the irqs that were actually requested */ 2543 if (!adapter->q_vector[i]->rx.ring && 2544 !adapter->q_vector[i]->tx.ring) 2545 continue; 2546 2547 /* clear the affinity_mask in the IRQ descriptor */ 2548 irq_set_affinity_hint(adapter->msix_entries[i].vector, 2549 NULL); 2550 2551 free_irq(adapter->msix_entries[i].vector, 2552 adapter->q_vector[i]); 2553 } 2554 } else { 2555 free_irq(adapter->pdev->irq, adapter); 2556 } 2557 } 2558 2559 /** 2560 * ixgbe_irq_disable - Mask off interrupt generation on the NIC 2561 * @adapter: board private structure 2562 **/ 2563 static inline void ixgbe_irq_disable(struct ixgbe_adapter *adapter) 2564 { 2565 switch (adapter->hw.mac.type) { 2566 case ixgbe_mac_82598EB: 2567 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, ~0); 2568 break; 2569 case ixgbe_mac_82599EB: 2570 case ixgbe_mac_X540: 2571 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, 0xFFFF0000); 2572 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC_EX(0), ~0); 2573 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC_EX(1), ~0); 2574 break; 2575 default: 2576 break; 2577 } 2578 IXGBE_WRITE_FLUSH(&adapter->hw); 2579 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) { 2580 int i; 2581 for (i = 0; i < adapter->num_msix_vectors; i++) 2582 synchronize_irq(adapter->msix_entries[i].vector); 2583 } else { 2584 synchronize_irq(adapter->pdev->irq); 2585 } 2586 } 2587 2588 /** 2589 * ixgbe_configure_msi_and_legacy - Initialize PIN (INTA...) and MSI interrupts 2590 * 2591 **/ 2592 static void ixgbe_configure_msi_and_legacy(struct ixgbe_adapter *adapter) 2593 { 2594 struct ixgbe_q_vector *q_vector = adapter->q_vector[0]; 2595 2596 /* rx/tx vector */ 2597 if (adapter->rx_itr_setting == 1) 2598 q_vector->itr = IXGBE_20K_ITR; 2599 else 2600 q_vector->itr = adapter->rx_itr_setting; 2601 2602 ixgbe_write_eitr(q_vector); 2603 2604 ixgbe_set_ivar(adapter, 0, 0, 0); 2605 ixgbe_set_ivar(adapter, 1, 0, 0); 2606 2607 e_info(hw, "Legacy interrupt IVAR setup done\n"); 2608 } 2609 2610 /** 2611 * ixgbe_configure_tx_ring - Configure 8259x Tx ring after Reset 2612 * @adapter: board private structure 2613 * @ring: structure containing ring specific data 2614 * 2615 * Configure the Tx descriptor ring after a reset. 2616 **/ 2617 void ixgbe_configure_tx_ring(struct ixgbe_adapter *adapter, 2618 struct ixgbe_ring *ring) 2619 { 2620 struct ixgbe_hw *hw = &adapter->hw; 2621 u64 tdba = ring->dma; 2622 int wait_loop = 10; 2623 u32 txdctl = IXGBE_TXDCTL_ENABLE; 2624 u8 reg_idx = ring->reg_idx; 2625 2626 /* disable queue to avoid issues while updating state */ 2627 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(reg_idx), 0); 2628 IXGBE_WRITE_FLUSH(hw); 2629 2630 IXGBE_WRITE_REG(hw, IXGBE_TDBAL(reg_idx), 2631 (tdba & DMA_BIT_MASK(32))); 2632 IXGBE_WRITE_REG(hw, IXGBE_TDBAH(reg_idx), (tdba >> 32)); 2633 IXGBE_WRITE_REG(hw, IXGBE_TDLEN(reg_idx), 2634 ring->count * sizeof(union ixgbe_adv_tx_desc)); 2635 IXGBE_WRITE_REG(hw, IXGBE_TDH(reg_idx), 0); 2636 IXGBE_WRITE_REG(hw, IXGBE_TDT(reg_idx), 0); 2637 ring->tail = hw->hw_addr + IXGBE_TDT(reg_idx); 2638 2639 /* 2640 * set WTHRESH to encourage burst writeback, it should not be set 2641 * higher than 1 when ITR is 0 as it could cause false TX hangs 2642 * 2643 * In order to avoid issues WTHRESH + PTHRESH should always be equal 2644 * to or less than the number of on chip descriptors, which is 2645 * currently 40. 2646 */ 2647 if (!ring->q_vector || (ring->q_vector->itr < 8)) 2648 txdctl |= (1 << 16); /* WTHRESH = 1 */ 2649 else 2650 txdctl |= (8 << 16); /* WTHRESH = 8 */ 2651 2652 /* 2653 * Setting PTHRESH to 32 both improves performance 2654 * and avoids a TX hang with DFP enabled 2655 */ 2656 txdctl |= (1 << 8) | /* HTHRESH = 1 */ 2657 32; /* PTHRESH = 32 */ 2658 2659 /* reinitialize flowdirector state */ 2660 if ((adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) && 2661 adapter->atr_sample_rate) { 2662 ring->atr_sample_rate = adapter->atr_sample_rate; 2663 ring->atr_count = 0; 2664 set_bit(__IXGBE_TX_FDIR_INIT_DONE, &ring->state); 2665 } else { 2666 ring->atr_sample_rate = 0; 2667 } 2668 2669 clear_bit(__IXGBE_HANG_CHECK_ARMED, &ring->state); 2670 2671 /* enable queue */ 2672 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(reg_idx), txdctl); 2673 2674 netdev_tx_reset_queue(txring_txq(ring)); 2675 2676 /* TXDCTL.EN will return 0 on 82598 if link is down, so skip it */ 2677 if (hw->mac.type == ixgbe_mac_82598EB && 2678 !(IXGBE_READ_REG(hw, IXGBE_LINKS) & IXGBE_LINKS_UP)) 2679 return; 2680 2681 /* poll to verify queue is enabled */ 2682 do { 2683 usleep_range(1000, 2000); 2684 txdctl = IXGBE_READ_REG(hw, IXGBE_TXDCTL(reg_idx)); 2685 } while (--wait_loop && !(txdctl & IXGBE_TXDCTL_ENABLE)); 2686 if (!wait_loop) 2687 e_err(drv, "Could not enable Tx Queue %d\n", reg_idx); 2688 } 2689 2690 static void ixgbe_setup_mtqc(struct ixgbe_adapter *adapter) 2691 { 2692 struct ixgbe_hw *hw = &adapter->hw; 2693 u32 rttdcs; 2694 u32 reg; 2695 u8 tcs = netdev_get_num_tc(adapter->netdev); 2696 2697 if (hw->mac.type == ixgbe_mac_82598EB) 2698 return; 2699 2700 /* disable the arbiter while setting MTQC */ 2701 rttdcs = IXGBE_READ_REG(hw, IXGBE_RTTDCS); 2702 rttdcs |= IXGBE_RTTDCS_ARBDIS; 2703 IXGBE_WRITE_REG(hw, IXGBE_RTTDCS, rttdcs); 2704 2705 /* set transmit pool layout */ 2706 switch (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) { 2707 case (IXGBE_FLAG_SRIOV_ENABLED): 2708 IXGBE_WRITE_REG(hw, IXGBE_MTQC, 2709 (IXGBE_MTQC_VT_ENA | IXGBE_MTQC_64VF)); 2710 break; 2711 default: 2712 if (!tcs) 2713 reg = IXGBE_MTQC_64Q_1PB; 2714 else if (tcs <= 4) 2715 reg = IXGBE_MTQC_RT_ENA | IXGBE_MTQC_4TC_4TQ; 2716 else 2717 reg = IXGBE_MTQC_RT_ENA | IXGBE_MTQC_8TC_8TQ; 2718 2719 IXGBE_WRITE_REG(hw, IXGBE_MTQC, reg); 2720 2721 /* Enable Security TX Buffer IFG for multiple pb */ 2722 if (tcs) { 2723 reg = IXGBE_READ_REG(hw, IXGBE_SECTXMINIFG); 2724 reg |= IXGBE_SECTX_DCB; 2725 IXGBE_WRITE_REG(hw, IXGBE_SECTXMINIFG, reg); 2726 } 2727 break; 2728 } 2729 2730 /* re-enable the arbiter */ 2731 rttdcs &= ~IXGBE_RTTDCS_ARBDIS; 2732 IXGBE_WRITE_REG(hw, IXGBE_RTTDCS, rttdcs); 2733 } 2734 2735 /** 2736 * ixgbe_configure_tx - Configure 8259x Transmit Unit after Reset 2737 * @adapter: board private structure 2738 * 2739 * Configure the Tx unit of the MAC after a reset. 2740 **/ 2741 static void ixgbe_configure_tx(struct ixgbe_adapter *adapter) 2742 { 2743 struct ixgbe_hw *hw = &adapter->hw; 2744 u32 dmatxctl; 2745 u32 i; 2746 2747 ixgbe_setup_mtqc(adapter); 2748 2749 if (hw->mac.type != ixgbe_mac_82598EB) { 2750 /* DMATXCTL.EN must be before Tx queues are enabled */ 2751 dmatxctl = IXGBE_READ_REG(hw, IXGBE_DMATXCTL); 2752 dmatxctl |= IXGBE_DMATXCTL_TE; 2753 IXGBE_WRITE_REG(hw, IXGBE_DMATXCTL, dmatxctl); 2754 } 2755 2756 /* Setup the HW Tx Head and Tail descriptor pointers */ 2757 for (i = 0; i < adapter->num_tx_queues; i++) 2758 ixgbe_configure_tx_ring(adapter, adapter->tx_ring[i]); 2759 } 2760 2761 #define IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT 2 2762 2763 static void ixgbe_configure_srrctl(struct ixgbe_adapter *adapter, 2764 struct ixgbe_ring *rx_ring) 2765 { 2766 u32 srrctl; 2767 u8 reg_idx = rx_ring->reg_idx; 2768 2769 switch (adapter->hw.mac.type) { 2770 case ixgbe_mac_82598EB: { 2771 struct ixgbe_ring_feature *feature = adapter->ring_feature; 2772 const int mask = feature[RING_F_RSS].mask; 2773 reg_idx = reg_idx & mask; 2774 } 2775 break; 2776 case ixgbe_mac_82599EB: 2777 case ixgbe_mac_X540: 2778 default: 2779 break; 2780 } 2781 2782 srrctl = IXGBE_READ_REG(&adapter->hw, IXGBE_SRRCTL(reg_idx)); 2783 2784 srrctl &= ~IXGBE_SRRCTL_BSIZEHDR_MASK; 2785 srrctl &= ~IXGBE_SRRCTL_BSIZEPKT_MASK; 2786 if (adapter->num_vfs) 2787 srrctl |= IXGBE_SRRCTL_DROP_EN; 2788 2789 srrctl |= (IXGBE_RX_HDR_SIZE << IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT) & 2790 IXGBE_SRRCTL_BSIZEHDR_MASK; 2791 2792 #if PAGE_SIZE > IXGBE_MAX_RXBUFFER 2793 srrctl |= IXGBE_MAX_RXBUFFER >> IXGBE_SRRCTL_BSIZEPKT_SHIFT; 2794 #else 2795 srrctl |= ixgbe_rx_bufsz(rx_ring) >> IXGBE_SRRCTL_BSIZEPKT_SHIFT; 2796 #endif 2797 srrctl |= IXGBE_SRRCTL_DESCTYPE_ADV_ONEBUF; 2798 2799 IXGBE_WRITE_REG(&adapter->hw, IXGBE_SRRCTL(reg_idx), srrctl); 2800 } 2801 2802 static void ixgbe_setup_mrqc(struct ixgbe_adapter *adapter) 2803 { 2804 struct ixgbe_hw *hw = &adapter->hw; 2805 static const u32 seed[10] = { 0xE291D73D, 0x1805EC6C, 0x2A94B30D, 2806 0xA54F2BEC, 0xEA49AF7C, 0xE214AD3D, 0xB855AABE, 2807 0x6A3E67EA, 0x14364D17, 0x3BED200D}; 2808 u32 mrqc = 0, reta = 0; 2809 u32 rxcsum; 2810 int i, j; 2811 u8 tcs = netdev_get_num_tc(adapter->netdev); 2812 int maxq = adapter->ring_feature[RING_F_RSS].indices; 2813 2814 if (tcs) 2815 maxq = min(maxq, adapter->num_tx_queues / tcs); 2816 2817 /* Fill out hash function seeds */ 2818 for (i = 0; i < 10; i++) 2819 IXGBE_WRITE_REG(hw, IXGBE_RSSRK(i), seed[i]); 2820 2821 /* Fill out redirection table */ 2822 for (i = 0, j = 0; i < 128; i++, j++) { 2823 if (j == maxq) 2824 j = 0; 2825 /* reta = 4-byte sliding window of 2826 * 0x00..(indices-1)(indices-1)00..etc. */ 2827 reta = (reta << 8) | (j * 0x11); 2828 if ((i & 3) == 3) 2829 IXGBE_WRITE_REG(hw, IXGBE_RETA(i >> 2), reta); 2830 } 2831 2832 /* Disable indicating checksum in descriptor, enables RSS hash */ 2833 rxcsum = IXGBE_READ_REG(hw, IXGBE_RXCSUM); 2834 rxcsum |= IXGBE_RXCSUM_PCSD; 2835 IXGBE_WRITE_REG(hw, IXGBE_RXCSUM, rxcsum); 2836 2837 if (adapter->hw.mac.type == ixgbe_mac_82598EB && 2838 (adapter->flags & IXGBE_FLAG_RSS_ENABLED)) { 2839 mrqc = IXGBE_MRQC_RSSEN; 2840 } else { 2841 int mask = adapter->flags & (IXGBE_FLAG_RSS_ENABLED 2842 | IXGBE_FLAG_SRIOV_ENABLED); 2843 2844 switch (mask) { 2845 case (IXGBE_FLAG_RSS_ENABLED): 2846 if (!tcs) 2847 mrqc = IXGBE_MRQC_RSSEN; 2848 else if (tcs <= 4) 2849 mrqc = IXGBE_MRQC_RTRSS4TCEN; 2850 else 2851 mrqc = IXGBE_MRQC_RTRSS8TCEN; 2852 break; 2853 case (IXGBE_FLAG_SRIOV_ENABLED): 2854 mrqc = IXGBE_MRQC_VMDQEN; 2855 break; 2856 default: 2857 break; 2858 } 2859 } 2860 2861 /* Perform hash on these packet types */ 2862 mrqc |= IXGBE_MRQC_RSS_FIELD_IPV4 2863 | IXGBE_MRQC_RSS_FIELD_IPV4_TCP 2864 | IXGBE_MRQC_RSS_FIELD_IPV6 2865 | IXGBE_MRQC_RSS_FIELD_IPV6_TCP; 2866 2867 if (adapter->flags2 & IXGBE_FLAG2_RSS_FIELD_IPV4_UDP) 2868 mrqc |= IXGBE_MRQC_RSS_FIELD_IPV4_UDP; 2869 if (adapter->flags2 & IXGBE_FLAG2_RSS_FIELD_IPV6_UDP) 2870 mrqc |= IXGBE_MRQC_RSS_FIELD_IPV6_UDP; 2871 2872 IXGBE_WRITE_REG(hw, IXGBE_MRQC, mrqc); 2873 } 2874 2875 /** 2876 * ixgbe_configure_rscctl - enable RSC for the indicated ring 2877 * @adapter: address of board private structure 2878 * @index: index of ring to set 2879 **/ 2880 static void ixgbe_configure_rscctl(struct ixgbe_adapter *adapter, 2881 struct ixgbe_ring *ring) 2882 { 2883 struct ixgbe_hw *hw = &adapter->hw; 2884 u32 rscctrl; 2885 u8 reg_idx = ring->reg_idx; 2886 2887 if (!ring_is_rsc_enabled(ring)) 2888 return; 2889 2890 rscctrl = IXGBE_READ_REG(hw, IXGBE_RSCCTL(reg_idx)); 2891 rscctrl |= IXGBE_RSCCTL_RSCEN; 2892 /* 2893 * we must limit the number of descriptors so that the 2894 * total size of max desc * buf_len is not greater 2895 * than 65536 2896 */ 2897 #if (PAGE_SIZE <= 8192) 2898 rscctrl |= IXGBE_RSCCTL_MAXDESC_16; 2899 #elif (PAGE_SIZE <= 16384) 2900 rscctrl |= IXGBE_RSCCTL_MAXDESC_8; 2901 #else 2902 rscctrl |= IXGBE_RSCCTL_MAXDESC_4; 2903 #endif 2904 IXGBE_WRITE_REG(hw, IXGBE_RSCCTL(reg_idx), rscctrl); 2905 } 2906 2907 /** 2908 * ixgbe_set_uta - Set unicast filter table address 2909 * @adapter: board private structure 2910 * 2911 * The unicast table address is a register array of 32-bit registers. 2912 * The table is meant to be used in a way similar to how the MTA is used 2913 * however due to certain limitations in the hardware it is necessary to 2914 * set all the hash bits to 1 and use the VMOLR ROPE bit as a promiscuous 2915 * enable bit to allow vlan tag stripping when promiscuous mode is enabled 2916 **/ 2917 static void ixgbe_set_uta(struct ixgbe_adapter *adapter) 2918 { 2919 struct ixgbe_hw *hw = &adapter->hw; 2920 int i; 2921 2922 /* The UTA table only exists on 82599 hardware and newer */ 2923 if (hw->mac.type < ixgbe_mac_82599EB) 2924 return; 2925 2926 /* we only need to do this if VMDq is enabled */ 2927 if (!(adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)) 2928 return; 2929 2930 for (i = 0; i < 128; i++) 2931 IXGBE_WRITE_REG(hw, IXGBE_UTA(i), ~0); 2932 } 2933 2934 #define IXGBE_MAX_RX_DESC_POLL 10 2935 static void ixgbe_rx_desc_queue_enable(struct ixgbe_adapter *adapter, 2936 struct ixgbe_ring *ring) 2937 { 2938 struct ixgbe_hw *hw = &adapter->hw; 2939 int wait_loop = IXGBE_MAX_RX_DESC_POLL; 2940 u32 rxdctl; 2941 u8 reg_idx = ring->reg_idx; 2942 2943 /* RXDCTL.EN will return 0 on 82598 if link is down, so skip it */ 2944 if (hw->mac.type == ixgbe_mac_82598EB && 2945 !(IXGBE_READ_REG(hw, IXGBE_LINKS) & IXGBE_LINKS_UP)) 2946 return; 2947 2948 do { 2949 usleep_range(1000, 2000); 2950 rxdctl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(reg_idx)); 2951 } while (--wait_loop && !(rxdctl & IXGBE_RXDCTL_ENABLE)); 2952 2953 if (!wait_loop) { 2954 e_err(drv, "RXDCTL.ENABLE on Rx queue %d not set within " 2955 "the polling period\n", reg_idx); 2956 } 2957 } 2958 2959 void ixgbe_disable_rx_queue(struct ixgbe_adapter *adapter, 2960 struct ixgbe_ring *ring) 2961 { 2962 struct ixgbe_hw *hw = &adapter->hw; 2963 int wait_loop = IXGBE_MAX_RX_DESC_POLL; 2964 u32 rxdctl; 2965 u8 reg_idx = ring->reg_idx; 2966 2967 rxdctl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(reg_idx)); 2968 rxdctl &= ~IXGBE_RXDCTL_ENABLE; 2969 2970 /* write value back with RXDCTL.ENABLE bit cleared */ 2971 IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(reg_idx), rxdctl); 2972 2973 if (hw->mac.type == ixgbe_mac_82598EB && 2974 !(IXGBE_READ_REG(hw, IXGBE_LINKS) & IXGBE_LINKS_UP)) 2975 return; 2976 2977 /* the hardware may take up to 100us to really disable the rx queue */ 2978 do { 2979 udelay(10); 2980 rxdctl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(reg_idx)); 2981 } while (--wait_loop && (rxdctl & IXGBE_RXDCTL_ENABLE)); 2982 2983 if (!wait_loop) { 2984 e_err(drv, "RXDCTL.ENABLE on Rx queue %d not cleared within " 2985 "the polling period\n", reg_idx); 2986 } 2987 } 2988 2989 void ixgbe_configure_rx_ring(struct ixgbe_adapter *adapter, 2990 struct ixgbe_ring *ring) 2991 { 2992 struct ixgbe_hw *hw = &adapter->hw; 2993 u64 rdba = ring->dma; 2994 u32 rxdctl; 2995 u8 reg_idx = ring->reg_idx; 2996 2997 /* disable queue to avoid issues while updating state */ 2998 rxdctl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(reg_idx)); 2999 ixgbe_disable_rx_queue(adapter, ring); 3000 3001 IXGBE_WRITE_REG(hw, IXGBE_RDBAL(reg_idx), (rdba & DMA_BIT_MASK(32))); 3002 IXGBE_WRITE_REG(hw, IXGBE_RDBAH(reg_idx), (rdba >> 32)); 3003 IXGBE_WRITE_REG(hw, IXGBE_RDLEN(reg_idx), 3004 ring->count * sizeof(union ixgbe_adv_rx_desc)); 3005 IXGBE_WRITE_REG(hw, IXGBE_RDH(reg_idx), 0); 3006 IXGBE_WRITE_REG(hw, IXGBE_RDT(reg_idx), 0); 3007 ring->tail = hw->hw_addr + IXGBE_RDT(reg_idx); 3008 3009 ixgbe_configure_srrctl(adapter, ring); 3010 ixgbe_configure_rscctl(adapter, ring); 3011 3012 /* If operating in IOV mode set RLPML for X540 */ 3013 if ((adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) && 3014 hw->mac.type == ixgbe_mac_X540) { 3015 rxdctl &= ~IXGBE_RXDCTL_RLPMLMASK; 3016 rxdctl |= ((ring->netdev->mtu + ETH_HLEN + 3017 ETH_FCS_LEN + VLAN_HLEN) | IXGBE_RXDCTL_RLPML_EN); 3018 } 3019 3020 if (hw->mac.type == ixgbe_mac_82598EB) { 3021 /* 3022 * enable cache line friendly hardware writes: 3023 * PTHRESH=32 descriptors (half the internal cache), 3024 * this also removes ugly rx_no_buffer_count increment 3025 * HTHRESH=4 descriptors (to minimize latency on fetch) 3026 * WTHRESH=8 burst writeback up to two cache lines 3027 */ 3028 rxdctl &= ~0x3FFFFF; 3029 rxdctl |= 0x080420; 3030 } 3031 3032 /* enable receive descriptor ring */ 3033 rxdctl |= IXGBE_RXDCTL_ENABLE; 3034 IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(reg_idx), rxdctl); 3035 3036 ixgbe_rx_desc_queue_enable(adapter, ring); 3037 ixgbe_alloc_rx_buffers(ring, ixgbe_desc_unused(ring)); 3038 } 3039 3040 static void ixgbe_setup_psrtype(struct ixgbe_adapter *adapter) 3041 { 3042 struct ixgbe_hw *hw = &adapter->hw; 3043 int p; 3044 3045 /* PSRTYPE must be initialized in non 82598 adapters */ 3046 u32 psrtype = IXGBE_PSRTYPE_TCPHDR | 3047 IXGBE_PSRTYPE_UDPHDR | 3048 IXGBE_PSRTYPE_IPV4HDR | 3049 IXGBE_PSRTYPE_L2HDR | 3050 IXGBE_PSRTYPE_IPV6HDR; 3051 3052 if (hw->mac.type == ixgbe_mac_82598EB) 3053 return; 3054 3055 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) 3056 psrtype |= (adapter->num_rx_queues_per_pool << 29); 3057 3058 for (p = 0; p < adapter->num_rx_pools; p++) 3059 IXGBE_WRITE_REG(hw, IXGBE_PSRTYPE(adapter->num_vfs + p), 3060 psrtype); 3061 } 3062 3063 static void ixgbe_configure_virtualization(struct ixgbe_adapter *adapter) 3064 { 3065 struct ixgbe_hw *hw = &adapter->hw; 3066 u32 gcr_ext; 3067 u32 vt_reg_bits; 3068 u32 reg_offset, vf_shift; 3069 u32 vmdctl; 3070 int i; 3071 3072 if (!(adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)) 3073 return; 3074 3075 vmdctl = IXGBE_READ_REG(hw, IXGBE_VT_CTL); 3076 vt_reg_bits = IXGBE_VMD_CTL_VMDQ_EN | IXGBE_VT_CTL_REPLEN; 3077 vt_reg_bits |= (adapter->num_vfs << IXGBE_VT_CTL_POOL_SHIFT); 3078 IXGBE_WRITE_REG(hw, IXGBE_VT_CTL, vmdctl | vt_reg_bits); 3079 3080 vf_shift = adapter->num_vfs % 32; 3081 reg_offset = (adapter->num_vfs >= 32) ? 1 : 0; 3082 3083 /* Enable only the PF's pool for Tx/Rx */ 3084 IXGBE_WRITE_REG(hw, IXGBE_VFRE(reg_offset), (1 << vf_shift)); 3085 IXGBE_WRITE_REG(hw, IXGBE_VFRE(reg_offset ^ 1), 0); 3086 IXGBE_WRITE_REG(hw, IXGBE_VFTE(reg_offset), (1 << vf_shift)); 3087 IXGBE_WRITE_REG(hw, IXGBE_VFTE(reg_offset ^ 1), 0); 3088 IXGBE_WRITE_REG(hw, IXGBE_PFDTXGSWC, IXGBE_PFDTXGSWC_VT_LBEN); 3089 3090 /* Map PF MAC address in RAR Entry 0 to first pool following VFs */ 3091 hw->mac.ops.set_vmdq(hw, 0, adapter->num_vfs); 3092 3093 /* 3094 * Set up VF register offsets for selected VT Mode, 3095 * i.e. 32 or 64 VFs for SR-IOV 3096 */ 3097 gcr_ext = IXGBE_READ_REG(hw, IXGBE_GCR_EXT); 3098 gcr_ext |= IXGBE_GCR_EXT_MSIX_EN; 3099 gcr_ext |= IXGBE_GCR_EXT_VT_MODE_64; 3100 IXGBE_WRITE_REG(hw, IXGBE_GCR_EXT, gcr_ext); 3101 3102 /* enable Tx loopback for VF/PF communication */ 3103 IXGBE_WRITE_REG(hw, IXGBE_PFDTXGSWC, IXGBE_PFDTXGSWC_VT_LBEN); 3104 /* Enable MAC Anti-Spoofing */ 3105 hw->mac.ops.set_mac_anti_spoofing(hw, 3106 (adapter->num_vfs != 0), 3107 adapter->num_vfs); 3108 /* For VFs that have spoof checking turned off */ 3109 for (i = 0; i < adapter->num_vfs; i++) { 3110 if (!adapter->vfinfo[i].spoofchk_enabled) 3111 ixgbe_ndo_set_vf_spoofchk(adapter->netdev, i, false); 3112 } 3113 } 3114 3115 static void ixgbe_set_rx_buffer_len(struct ixgbe_adapter *adapter) 3116 { 3117 struct ixgbe_hw *hw = &adapter->hw; 3118 struct net_device *netdev = adapter->netdev; 3119 int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN; 3120 struct ixgbe_ring *rx_ring; 3121 int i; 3122 u32 mhadd, hlreg0; 3123 3124 #ifdef IXGBE_FCOE 3125 /* adjust max frame to be able to do baby jumbo for FCoE */ 3126 if ((adapter->flags & IXGBE_FLAG_FCOE_ENABLED) && 3127 (max_frame < IXGBE_FCOE_JUMBO_FRAME_SIZE)) 3128 max_frame = IXGBE_FCOE_JUMBO_FRAME_SIZE; 3129 3130 #endif /* IXGBE_FCOE */ 3131 mhadd = IXGBE_READ_REG(hw, IXGBE_MHADD); 3132 if (max_frame != (mhadd >> IXGBE_MHADD_MFS_SHIFT)) { 3133 mhadd &= ~IXGBE_MHADD_MFS_MASK; 3134 mhadd |= max_frame << IXGBE_MHADD_MFS_SHIFT; 3135 3136 IXGBE_WRITE_REG(hw, IXGBE_MHADD, mhadd); 3137 } 3138 3139 /* MHADD will allow an extra 4 bytes past for vlan tagged frames */ 3140 max_frame += VLAN_HLEN; 3141 3142 hlreg0 = IXGBE_READ_REG(hw, IXGBE_HLREG0); 3143 /* set jumbo enable since MHADD.MFS is keeping size locked at max_frame */ 3144 hlreg0 |= IXGBE_HLREG0_JUMBOEN; 3145 IXGBE_WRITE_REG(hw, IXGBE_HLREG0, hlreg0); 3146 3147 /* 3148 * Setup the HW Rx Head and Tail Descriptor Pointers and 3149 * the Base and Length of the Rx Descriptor Ring 3150 */ 3151 for (i = 0; i < adapter->num_rx_queues; i++) { 3152 rx_ring = adapter->rx_ring[i]; 3153 if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED) 3154 set_ring_rsc_enabled(rx_ring); 3155 else 3156 clear_ring_rsc_enabled(rx_ring); 3157 #ifdef IXGBE_FCOE 3158 if (netdev->features & NETIF_F_FCOE_MTU) { 3159 struct ixgbe_ring_feature *f; 3160 f = &adapter->ring_feature[RING_F_FCOE]; 3161 if ((i >= f->mask) && (i < f->mask + f->indices)) 3162 set_bit(__IXGBE_RX_FCOE_BUFSZ, &rx_ring->state); 3163 } 3164 #endif /* IXGBE_FCOE */ 3165 } 3166 } 3167 3168 static void ixgbe_setup_rdrxctl(struct ixgbe_adapter *adapter) 3169 { 3170 struct ixgbe_hw *hw = &adapter->hw; 3171 u32 rdrxctl = IXGBE_READ_REG(hw, IXGBE_RDRXCTL); 3172 3173 switch (hw->mac.type) { 3174 case ixgbe_mac_82598EB: 3175 /* 3176 * For VMDq support of different descriptor types or 3177 * buffer sizes through the use of multiple SRRCTL 3178 * registers, RDRXCTL.MVMEN must be set to 1 3179 * 3180 * also, the manual doesn't mention it clearly but DCA hints 3181 * will only use queue 0's tags unless this bit is set. Side 3182 * effects of setting this bit are only that SRRCTL must be 3183 * fully programmed [0..15] 3184 */ 3185 rdrxctl |= IXGBE_RDRXCTL_MVMEN; 3186 break; 3187 case ixgbe_mac_82599EB: 3188 case ixgbe_mac_X540: 3189 /* Disable RSC for ACK packets */ 3190 IXGBE_WRITE_REG(hw, IXGBE_RSCDBU, 3191 (IXGBE_RSCDBU_RSCACKDIS | IXGBE_READ_REG(hw, IXGBE_RSCDBU))); 3192 rdrxctl &= ~IXGBE_RDRXCTL_RSCFRSTSIZE; 3193 /* hardware requires some bits to be set by default */ 3194 rdrxctl |= (IXGBE_RDRXCTL_RSCACKC | IXGBE_RDRXCTL_FCOE_WRFIX); 3195 rdrxctl |= IXGBE_RDRXCTL_CRCSTRIP; 3196 break; 3197 default: 3198 /* We should do nothing since we don't know this hardware */ 3199 return; 3200 } 3201 3202 IXGBE_WRITE_REG(hw, IXGBE_RDRXCTL, rdrxctl); 3203 } 3204 3205 /** 3206 * ixgbe_configure_rx - Configure 8259x Receive Unit after Reset 3207 * @adapter: board private structure 3208 * 3209 * Configure the Rx unit of the MAC after a reset. 3210 **/ 3211 static void ixgbe_configure_rx(struct ixgbe_adapter *adapter) 3212 { 3213 struct ixgbe_hw *hw = &adapter->hw; 3214 int i; 3215 u32 rxctrl; 3216 3217 /* disable receives while setting up the descriptors */ 3218 rxctrl = IXGBE_READ_REG(hw, IXGBE_RXCTRL); 3219 IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, rxctrl & ~IXGBE_RXCTRL_RXEN); 3220 3221 ixgbe_setup_psrtype(adapter); 3222 ixgbe_setup_rdrxctl(adapter); 3223 3224 /* Program registers for the distribution of queues */ 3225 ixgbe_setup_mrqc(adapter); 3226 3227 ixgbe_set_uta(adapter); 3228 3229 /* set_rx_buffer_len must be called before ring initialization */ 3230 ixgbe_set_rx_buffer_len(adapter); 3231 3232 /* 3233 * Setup the HW Rx Head and Tail Descriptor Pointers and 3234 * the Base and Length of the Rx Descriptor Ring 3235 */ 3236 for (i = 0; i < adapter->num_rx_queues; i++) 3237 ixgbe_configure_rx_ring(adapter, adapter->rx_ring[i]); 3238 3239 /* disable drop enable for 82598 parts */ 3240 if (hw->mac.type == ixgbe_mac_82598EB) 3241 rxctrl |= IXGBE_RXCTRL_DMBYPS; 3242 3243 /* enable all receives */ 3244 rxctrl |= IXGBE_RXCTRL_RXEN; 3245 hw->mac.ops.enable_rx_dma(hw, rxctrl); 3246 } 3247 3248 static int ixgbe_vlan_rx_add_vid(struct net_device *netdev, u16 vid) 3249 { 3250 struct ixgbe_adapter *adapter = netdev_priv(netdev); 3251 struct ixgbe_hw *hw = &adapter->hw; 3252 int pool_ndx = adapter->num_vfs; 3253 3254 /* add VID to filter table */ 3255 hw->mac.ops.set_vfta(&adapter->hw, vid, pool_ndx, true); 3256 set_bit(vid, adapter->active_vlans); 3257 3258 return 0; 3259 } 3260 3261 static int ixgbe_vlan_rx_kill_vid(struct net_device *netdev, u16 vid) 3262 { 3263 struct ixgbe_adapter *adapter = netdev_priv(netdev); 3264 struct ixgbe_hw *hw = &adapter->hw; 3265 int pool_ndx = adapter->num_vfs; 3266 3267 /* remove VID from filter table */ 3268 hw->mac.ops.set_vfta(&adapter->hw, vid, pool_ndx, false); 3269 clear_bit(vid, adapter->active_vlans); 3270 3271 return 0; 3272 } 3273 3274 /** 3275 * ixgbe_vlan_filter_disable - helper to disable hw vlan filtering 3276 * @adapter: driver data 3277 */ 3278 static void ixgbe_vlan_filter_disable(struct ixgbe_adapter *adapter) 3279 { 3280 struct ixgbe_hw *hw = &adapter->hw; 3281 u32 vlnctrl; 3282 3283 vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL); 3284 vlnctrl &= ~(IXGBE_VLNCTRL_VFE | IXGBE_VLNCTRL_CFIEN); 3285 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl); 3286 } 3287 3288 /** 3289 * ixgbe_vlan_filter_enable - helper to enable hw vlan filtering 3290 * @adapter: driver data 3291 */ 3292 static void ixgbe_vlan_filter_enable(struct ixgbe_adapter *adapter) 3293 { 3294 struct ixgbe_hw *hw = &adapter->hw; 3295 u32 vlnctrl; 3296 3297 vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL); 3298 vlnctrl |= IXGBE_VLNCTRL_VFE; 3299 vlnctrl &= ~IXGBE_VLNCTRL_CFIEN; 3300 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl); 3301 } 3302 3303 /** 3304 * ixgbe_vlan_strip_disable - helper to disable hw vlan stripping 3305 * @adapter: driver data 3306 */ 3307 static void ixgbe_vlan_strip_disable(struct ixgbe_adapter *adapter) 3308 { 3309 struct ixgbe_hw *hw = &adapter->hw; 3310 u32 vlnctrl; 3311 int i, j; 3312 3313 switch (hw->mac.type) { 3314 case ixgbe_mac_82598EB: 3315 vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL); 3316 vlnctrl &= ~IXGBE_VLNCTRL_VME; 3317 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl); 3318 break; 3319 case ixgbe_mac_82599EB: 3320 case ixgbe_mac_X540: 3321 for (i = 0; i < adapter->num_rx_queues; i++) { 3322 j = adapter->rx_ring[i]->reg_idx; 3323 vlnctrl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(j)); 3324 vlnctrl &= ~IXGBE_RXDCTL_VME; 3325 IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(j), vlnctrl); 3326 } 3327 break; 3328 default: 3329 break; 3330 } 3331 } 3332 3333 /** 3334 * ixgbe_vlan_strip_enable - helper to enable hw vlan stripping 3335 * @adapter: driver data 3336 */ 3337 static void ixgbe_vlan_strip_enable(struct ixgbe_adapter *adapter) 3338 { 3339 struct ixgbe_hw *hw = &adapter->hw; 3340 u32 vlnctrl; 3341 int i, j; 3342 3343 switch (hw->mac.type) { 3344 case ixgbe_mac_82598EB: 3345 vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL); 3346 vlnctrl |= IXGBE_VLNCTRL_VME; 3347 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl); 3348 break; 3349 case ixgbe_mac_82599EB: 3350 case ixgbe_mac_X540: 3351 for (i = 0; i < adapter->num_rx_queues; i++) { 3352 j = adapter->rx_ring[i]->reg_idx; 3353 vlnctrl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(j)); 3354 vlnctrl |= IXGBE_RXDCTL_VME; 3355 IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(j), vlnctrl); 3356 } 3357 break; 3358 default: 3359 break; 3360 } 3361 } 3362 3363 static void ixgbe_restore_vlan(struct ixgbe_adapter *adapter) 3364 { 3365 u16 vid; 3366 3367 ixgbe_vlan_rx_add_vid(adapter->netdev, 0); 3368 3369 for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID) 3370 ixgbe_vlan_rx_add_vid(adapter->netdev, vid); 3371 } 3372 3373 /** 3374 * ixgbe_write_uc_addr_list - write unicast addresses to RAR table 3375 * @netdev: network interface device structure 3376 * 3377 * Writes unicast address list to the RAR table. 3378 * Returns: -ENOMEM on failure/insufficient address space 3379 * 0 on no addresses written 3380 * X on writing X addresses to the RAR table 3381 **/ 3382 static int ixgbe_write_uc_addr_list(struct net_device *netdev) 3383 { 3384 struct ixgbe_adapter *adapter = netdev_priv(netdev); 3385 struct ixgbe_hw *hw = &adapter->hw; 3386 unsigned int vfn = adapter->num_vfs; 3387 unsigned int rar_entries = IXGBE_MAX_PF_MACVLANS; 3388 int count = 0; 3389 3390 /* return ENOMEM indicating insufficient memory for addresses */ 3391 if (netdev_uc_count(netdev) > rar_entries) 3392 return -ENOMEM; 3393 3394 if (!netdev_uc_empty(netdev) && rar_entries) { 3395 struct netdev_hw_addr *ha; 3396 /* return error if we do not support writing to RAR table */ 3397 if (!hw->mac.ops.set_rar) 3398 return -ENOMEM; 3399 3400 netdev_for_each_uc_addr(ha, netdev) { 3401 if (!rar_entries) 3402 break; 3403 hw->mac.ops.set_rar(hw, rar_entries--, ha->addr, 3404 vfn, IXGBE_RAH_AV); 3405 count++; 3406 } 3407 } 3408 /* write the addresses in reverse order to avoid write combining */ 3409 for (; rar_entries > 0 ; rar_entries--) 3410 hw->mac.ops.clear_rar(hw, rar_entries); 3411 3412 return count; 3413 } 3414 3415 /** 3416 * ixgbe_set_rx_mode - Unicast, Multicast and Promiscuous mode set 3417 * @netdev: network interface device structure 3418 * 3419 * The set_rx_method entry point is called whenever the unicast/multicast 3420 * address list or the network interface flags are updated. This routine is 3421 * responsible for configuring the hardware for proper unicast, multicast and 3422 * promiscuous mode. 3423 **/ 3424 void ixgbe_set_rx_mode(struct net_device *netdev) 3425 { 3426 struct ixgbe_adapter *adapter = netdev_priv(netdev); 3427 struct ixgbe_hw *hw = &adapter->hw; 3428 u32 fctrl, vmolr = IXGBE_VMOLR_BAM | IXGBE_VMOLR_AUPE; 3429 int count; 3430 3431 /* Check for Promiscuous and All Multicast modes */ 3432 3433 fctrl = IXGBE_READ_REG(hw, IXGBE_FCTRL); 3434 3435 /* set all bits that we expect to always be set */ 3436 fctrl &= ~IXGBE_FCTRL_SBP; /* disable store-bad-packets */ 3437 fctrl |= IXGBE_FCTRL_BAM; 3438 fctrl |= IXGBE_FCTRL_DPF; /* discard pause frames when FC enabled */ 3439 fctrl |= IXGBE_FCTRL_PMCF; 3440 3441 /* clear the bits we are changing the status of */ 3442 fctrl &= ~(IXGBE_FCTRL_UPE | IXGBE_FCTRL_MPE); 3443 3444 if (netdev->flags & IFF_PROMISC) { 3445 hw->addr_ctrl.user_set_promisc = true; 3446 fctrl |= (IXGBE_FCTRL_UPE | IXGBE_FCTRL_MPE); 3447 vmolr |= (IXGBE_VMOLR_ROPE | IXGBE_VMOLR_MPE); 3448 /* don't hardware filter vlans in promisc mode */ 3449 ixgbe_vlan_filter_disable(adapter); 3450 } else { 3451 if (netdev->flags & IFF_ALLMULTI) { 3452 fctrl |= IXGBE_FCTRL_MPE; 3453 vmolr |= IXGBE_VMOLR_MPE; 3454 } else { 3455 /* 3456 * Write addresses to the MTA, if the attempt fails 3457 * then we should just turn on promiscuous mode so 3458 * that we can at least receive multicast traffic 3459 */ 3460 hw->mac.ops.update_mc_addr_list(hw, netdev); 3461 vmolr |= IXGBE_VMOLR_ROMPE; 3462 } 3463 ixgbe_vlan_filter_enable(adapter); 3464 hw->addr_ctrl.user_set_promisc = false; 3465 /* 3466 * Write addresses to available RAR registers, if there is not 3467 * sufficient space to store all the addresses then enable 3468 * unicast promiscuous mode 3469 */ 3470 count = ixgbe_write_uc_addr_list(netdev); 3471 if (count < 0) { 3472 fctrl |= IXGBE_FCTRL_UPE; 3473 vmolr |= IXGBE_VMOLR_ROPE; 3474 } 3475 } 3476 3477 if (adapter->num_vfs) { 3478 ixgbe_restore_vf_multicasts(adapter); 3479 vmolr |= IXGBE_READ_REG(hw, IXGBE_VMOLR(adapter->num_vfs)) & 3480 ~(IXGBE_VMOLR_MPE | IXGBE_VMOLR_ROMPE | 3481 IXGBE_VMOLR_ROPE); 3482 IXGBE_WRITE_REG(hw, IXGBE_VMOLR(adapter->num_vfs), vmolr); 3483 } 3484 3485 /* This is useful for sniffing bad packets. */ 3486 if (adapter->netdev->features & NETIF_F_RXALL) { 3487 /* UPE and MPE will be handled by normal PROMISC logic 3488 * in e1000e_set_rx_mode */ 3489 fctrl |= (IXGBE_FCTRL_SBP | /* Receive bad packets */ 3490 IXGBE_FCTRL_BAM | /* RX All Bcast Pkts */ 3491 IXGBE_FCTRL_PMCF); /* RX All MAC Ctrl Pkts */ 3492 3493 fctrl &= ~(IXGBE_FCTRL_DPF); 3494 /* NOTE: VLAN filtering is disabled by setting PROMISC */ 3495 } 3496 3497 IXGBE_WRITE_REG(hw, IXGBE_FCTRL, fctrl); 3498 3499 if (netdev->features & NETIF_F_HW_VLAN_RX) 3500 ixgbe_vlan_strip_enable(adapter); 3501 else 3502 ixgbe_vlan_strip_disable(adapter); 3503 } 3504 3505 static void ixgbe_napi_enable_all(struct ixgbe_adapter *adapter) 3506 { 3507 int q_idx; 3508 struct ixgbe_q_vector *q_vector; 3509 int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS; 3510 3511 /* legacy and MSI only use one vector */ 3512 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED)) 3513 q_vectors = 1; 3514 3515 for (q_idx = 0; q_idx < q_vectors; q_idx++) { 3516 q_vector = adapter->q_vector[q_idx]; 3517 napi_enable(&q_vector->napi); 3518 } 3519 } 3520 3521 static void ixgbe_napi_disable_all(struct ixgbe_adapter *adapter) 3522 { 3523 int q_idx; 3524 struct ixgbe_q_vector *q_vector; 3525 int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS; 3526 3527 /* legacy and MSI only use one vector */ 3528 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED)) 3529 q_vectors = 1; 3530 3531 for (q_idx = 0; q_idx < q_vectors; q_idx++) { 3532 q_vector = adapter->q_vector[q_idx]; 3533 napi_disable(&q_vector->napi); 3534 } 3535 } 3536 3537 #ifdef CONFIG_IXGBE_DCB 3538 /* 3539 * ixgbe_configure_dcb - Configure DCB hardware 3540 * @adapter: ixgbe adapter struct 3541 * 3542 * This is called by the driver on open to configure the DCB hardware. 3543 * This is also called by the gennetlink interface when reconfiguring 3544 * the DCB state. 3545 */ 3546 static void ixgbe_configure_dcb(struct ixgbe_adapter *adapter) 3547 { 3548 struct ixgbe_hw *hw = &adapter->hw; 3549 int max_frame = adapter->netdev->mtu + ETH_HLEN + ETH_FCS_LEN; 3550 3551 if (!(adapter->flags & IXGBE_FLAG_DCB_ENABLED)) { 3552 if (hw->mac.type == ixgbe_mac_82598EB) 3553 netif_set_gso_max_size(adapter->netdev, 65536); 3554 return; 3555 } 3556 3557 if (hw->mac.type == ixgbe_mac_82598EB) 3558 netif_set_gso_max_size(adapter->netdev, 32768); 3559 3560 3561 /* Enable VLAN tag insert/strip */ 3562 adapter->netdev->features |= NETIF_F_HW_VLAN_RX; 3563 3564 hw->mac.ops.set_vfta(&adapter->hw, 0, 0, true); 3565 3566 #ifdef IXGBE_FCOE 3567 if (adapter->netdev->features & NETIF_F_FCOE_MTU) 3568 max_frame = max(max_frame, IXGBE_FCOE_JUMBO_FRAME_SIZE); 3569 #endif 3570 3571 /* reconfigure the hardware */ 3572 if (adapter->dcbx_cap & DCB_CAP_DCBX_VER_CEE) { 3573 ixgbe_dcb_calculate_tc_credits(hw, &adapter->dcb_cfg, max_frame, 3574 DCB_TX_CONFIG); 3575 ixgbe_dcb_calculate_tc_credits(hw, &adapter->dcb_cfg, max_frame, 3576 DCB_RX_CONFIG); 3577 ixgbe_dcb_hw_config(hw, &adapter->dcb_cfg); 3578 } else if (adapter->ixgbe_ieee_ets && adapter->ixgbe_ieee_pfc) { 3579 ixgbe_dcb_hw_ets(&adapter->hw, 3580 adapter->ixgbe_ieee_ets, 3581 max_frame); 3582 ixgbe_dcb_hw_pfc_config(&adapter->hw, 3583 adapter->ixgbe_ieee_pfc->pfc_en, 3584 adapter->ixgbe_ieee_ets->prio_tc); 3585 } 3586 3587 /* Enable RSS Hash per TC */ 3588 if (hw->mac.type != ixgbe_mac_82598EB) { 3589 int i; 3590 u32 reg = 0; 3591 3592 for (i = 0; i < MAX_TRAFFIC_CLASS; i++) { 3593 u8 msb = 0; 3594 u8 cnt = adapter->netdev->tc_to_txq[i].count; 3595 3596 while (cnt >>= 1) 3597 msb++; 3598 3599 reg |= msb << IXGBE_RQTC_SHIFT_TC(i); 3600 } 3601 IXGBE_WRITE_REG(hw, IXGBE_RQTC, reg); 3602 } 3603 } 3604 #endif 3605 3606 /* Additional bittime to account for IXGBE framing */ 3607 #define IXGBE_ETH_FRAMING 20 3608 3609 /* 3610 * ixgbe_hpbthresh - calculate high water mark for flow control 3611 * 3612 * @adapter: board private structure to calculate for 3613 * @pb - packet buffer to calculate 3614 */ 3615 static int ixgbe_hpbthresh(struct ixgbe_adapter *adapter, int pb) 3616 { 3617 struct ixgbe_hw *hw = &adapter->hw; 3618 struct net_device *dev = adapter->netdev; 3619 int link, tc, kb, marker; 3620 u32 dv_id, rx_pba; 3621 3622 /* Calculate max LAN frame size */ 3623 tc = link = dev->mtu + ETH_HLEN + ETH_FCS_LEN + IXGBE_ETH_FRAMING; 3624 3625 #ifdef IXGBE_FCOE 3626 /* FCoE traffic class uses FCOE jumbo frames */ 3627 if (dev->features & NETIF_F_FCOE_MTU) { 3628 int fcoe_pb = 0; 3629 3630 #ifdef CONFIG_IXGBE_DCB 3631 fcoe_pb = netdev_get_prio_tc_map(dev, adapter->fcoe.up); 3632 3633 #endif 3634 if (fcoe_pb == pb && tc < IXGBE_FCOE_JUMBO_FRAME_SIZE) 3635 tc = IXGBE_FCOE_JUMBO_FRAME_SIZE; 3636 } 3637 #endif 3638 3639 /* Calculate delay value for device */ 3640 switch (hw->mac.type) { 3641 case ixgbe_mac_X540: 3642 dv_id = IXGBE_DV_X540(link, tc); 3643 break; 3644 default: 3645 dv_id = IXGBE_DV(link, tc); 3646 break; 3647 } 3648 3649 /* Loopback switch introduces additional latency */ 3650 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) 3651 dv_id += IXGBE_B2BT(tc); 3652 3653 /* Delay value is calculated in bit times convert to KB */ 3654 kb = IXGBE_BT2KB(dv_id); 3655 rx_pba = IXGBE_READ_REG(hw, IXGBE_RXPBSIZE(pb)) >> 10; 3656 3657 marker = rx_pba - kb; 3658 3659 /* It is possible that the packet buffer is not large enough 3660 * to provide required headroom. In this case throw an error 3661 * to user and a do the best we can. 3662 */ 3663 if (marker < 0) { 3664 e_warn(drv, "Packet Buffer(%i) can not provide enough" 3665 "headroom to support flow control." 3666 "Decrease MTU or number of traffic classes\n", pb); 3667 marker = tc + 1; 3668 } 3669 3670 return marker; 3671 } 3672 3673 /* 3674 * ixgbe_lpbthresh - calculate low water mark for for flow control 3675 * 3676 * @adapter: board private structure to calculate for 3677 * @pb - packet buffer to calculate 3678 */ 3679 static int ixgbe_lpbthresh(struct ixgbe_adapter *adapter) 3680 { 3681 struct ixgbe_hw *hw = &adapter->hw; 3682 struct net_device *dev = adapter->netdev; 3683 int tc; 3684 u32 dv_id; 3685 3686 /* Calculate max LAN frame size */ 3687 tc = dev->mtu + ETH_HLEN + ETH_FCS_LEN; 3688 3689 /* Calculate delay value for device */ 3690 switch (hw->mac.type) { 3691 case ixgbe_mac_X540: 3692 dv_id = IXGBE_LOW_DV_X540(tc); 3693 break; 3694 default: 3695 dv_id = IXGBE_LOW_DV(tc); 3696 break; 3697 } 3698 3699 /* Delay value is calculated in bit times convert to KB */ 3700 return IXGBE_BT2KB(dv_id); 3701 } 3702 3703 /* 3704 * ixgbe_pbthresh_setup - calculate and setup high low water marks 3705 */ 3706 static void ixgbe_pbthresh_setup(struct ixgbe_adapter *adapter) 3707 { 3708 struct ixgbe_hw *hw = &adapter->hw; 3709 int num_tc = netdev_get_num_tc(adapter->netdev); 3710 int i; 3711 3712 if (!num_tc) 3713 num_tc = 1; 3714 3715 hw->fc.low_water = ixgbe_lpbthresh(adapter); 3716 3717 for (i = 0; i < num_tc; i++) { 3718 hw->fc.high_water[i] = ixgbe_hpbthresh(adapter, i); 3719 3720 /* Low water marks must not be larger than high water marks */ 3721 if (hw->fc.low_water > hw->fc.high_water[i]) 3722 hw->fc.low_water = 0; 3723 } 3724 } 3725 3726 static void ixgbe_configure_pb(struct ixgbe_adapter *adapter) 3727 { 3728 struct ixgbe_hw *hw = &adapter->hw; 3729 int hdrm; 3730 u8 tc = netdev_get_num_tc(adapter->netdev); 3731 3732 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE || 3733 adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE) 3734 hdrm = 32 << adapter->fdir_pballoc; 3735 else 3736 hdrm = 0; 3737 3738 hw->mac.ops.set_rxpba(hw, tc, hdrm, PBA_STRATEGY_EQUAL); 3739 ixgbe_pbthresh_setup(adapter); 3740 } 3741 3742 static void ixgbe_fdir_filter_restore(struct ixgbe_adapter *adapter) 3743 { 3744 struct ixgbe_hw *hw = &adapter->hw; 3745 struct hlist_node *node, *node2; 3746 struct ixgbe_fdir_filter *filter; 3747 3748 spin_lock(&adapter->fdir_perfect_lock); 3749 3750 if (!hlist_empty(&adapter->fdir_filter_list)) 3751 ixgbe_fdir_set_input_mask_82599(hw, &adapter->fdir_mask); 3752 3753 hlist_for_each_entry_safe(filter, node, node2, 3754 &adapter->fdir_filter_list, fdir_node) { 3755 ixgbe_fdir_write_perfect_filter_82599(hw, 3756 &filter->filter, 3757 filter->sw_idx, 3758 (filter->action == IXGBE_FDIR_DROP_QUEUE) ? 3759 IXGBE_FDIR_DROP_QUEUE : 3760 adapter->rx_ring[filter->action]->reg_idx); 3761 } 3762 3763 spin_unlock(&adapter->fdir_perfect_lock); 3764 } 3765 3766 static void ixgbe_configure(struct ixgbe_adapter *adapter) 3767 { 3768 struct ixgbe_hw *hw = &adapter->hw; 3769 3770 ixgbe_configure_pb(adapter); 3771 #ifdef CONFIG_IXGBE_DCB 3772 ixgbe_configure_dcb(adapter); 3773 #endif 3774 3775 ixgbe_set_rx_mode(adapter->netdev); 3776 ixgbe_restore_vlan(adapter); 3777 3778 #ifdef IXGBE_FCOE 3779 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED) 3780 ixgbe_configure_fcoe(adapter); 3781 3782 #endif /* IXGBE_FCOE */ 3783 3784 switch (hw->mac.type) { 3785 case ixgbe_mac_82599EB: 3786 case ixgbe_mac_X540: 3787 hw->mac.ops.disable_rx_buff(hw); 3788 break; 3789 default: 3790 break; 3791 } 3792 3793 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) { 3794 ixgbe_init_fdir_signature_82599(&adapter->hw, 3795 adapter->fdir_pballoc); 3796 } else if (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE) { 3797 ixgbe_init_fdir_perfect_82599(&adapter->hw, 3798 adapter->fdir_pballoc); 3799 ixgbe_fdir_filter_restore(adapter); 3800 } 3801 3802 switch (hw->mac.type) { 3803 case ixgbe_mac_82599EB: 3804 case ixgbe_mac_X540: 3805 hw->mac.ops.enable_rx_buff(hw); 3806 break; 3807 default: 3808 break; 3809 } 3810 3811 ixgbe_configure_virtualization(adapter); 3812 3813 ixgbe_configure_tx(adapter); 3814 ixgbe_configure_rx(adapter); 3815 } 3816 3817 static inline bool ixgbe_is_sfp(struct ixgbe_hw *hw) 3818 { 3819 switch (hw->phy.type) { 3820 case ixgbe_phy_sfp_avago: 3821 case ixgbe_phy_sfp_ftl: 3822 case ixgbe_phy_sfp_intel: 3823 case ixgbe_phy_sfp_unknown: 3824 case ixgbe_phy_sfp_passive_tyco: 3825 case ixgbe_phy_sfp_passive_unknown: 3826 case ixgbe_phy_sfp_active_unknown: 3827 case ixgbe_phy_sfp_ftl_active: 3828 return true; 3829 case ixgbe_phy_nl: 3830 if (hw->mac.type == ixgbe_mac_82598EB) 3831 return true; 3832 default: 3833 return false; 3834 } 3835 } 3836 3837 /** 3838 * ixgbe_sfp_link_config - set up SFP+ link 3839 * @adapter: pointer to private adapter struct 3840 **/ 3841 static void ixgbe_sfp_link_config(struct ixgbe_adapter *adapter) 3842 { 3843 /* 3844 * We are assuming the worst case scenario here, and that 3845 * is that an SFP was inserted/removed after the reset 3846 * but before SFP detection was enabled. As such the best 3847 * solution is to just start searching as soon as we start 3848 */ 3849 if (adapter->hw.mac.type == ixgbe_mac_82598EB) 3850 adapter->flags2 |= IXGBE_FLAG2_SEARCH_FOR_SFP; 3851 3852 adapter->flags2 |= IXGBE_FLAG2_SFP_NEEDS_RESET; 3853 } 3854 3855 /** 3856 * ixgbe_non_sfp_link_config - set up non-SFP+ link 3857 * @hw: pointer to private hardware struct 3858 * 3859 * Returns 0 on success, negative on failure 3860 **/ 3861 static int ixgbe_non_sfp_link_config(struct ixgbe_hw *hw) 3862 { 3863 u32 autoneg; 3864 bool negotiation, link_up = false; 3865 u32 ret = IXGBE_ERR_LINK_SETUP; 3866 3867 if (hw->mac.ops.check_link) 3868 ret = hw->mac.ops.check_link(hw, &autoneg, &link_up, false); 3869 3870 if (ret) 3871 goto link_cfg_out; 3872 3873 autoneg = hw->phy.autoneg_advertised; 3874 if ((!autoneg) && (hw->mac.ops.get_link_capabilities)) 3875 ret = hw->mac.ops.get_link_capabilities(hw, &autoneg, 3876 &negotiation); 3877 if (ret) 3878 goto link_cfg_out; 3879 3880 if (hw->mac.ops.setup_link) 3881 ret = hw->mac.ops.setup_link(hw, autoneg, negotiation, link_up); 3882 link_cfg_out: 3883 return ret; 3884 } 3885 3886 static void ixgbe_setup_gpie(struct ixgbe_adapter *adapter) 3887 { 3888 struct ixgbe_hw *hw = &adapter->hw; 3889 u32 gpie = 0; 3890 3891 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) { 3892 gpie = IXGBE_GPIE_MSIX_MODE | IXGBE_GPIE_PBA_SUPPORT | 3893 IXGBE_GPIE_OCD; 3894 gpie |= IXGBE_GPIE_EIAME; 3895 /* 3896 * use EIAM to auto-mask when MSI-X interrupt is asserted 3897 * this saves a register write for every interrupt 3898 */ 3899 switch (hw->mac.type) { 3900 case ixgbe_mac_82598EB: 3901 IXGBE_WRITE_REG(hw, IXGBE_EIAM, IXGBE_EICS_RTX_QUEUE); 3902 break; 3903 case ixgbe_mac_82599EB: 3904 case ixgbe_mac_X540: 3905 default: 3906 IXGBE_WRITE_REG(hw, IXGBE_EIAM_EX(0), 0xFFFFFFFF); 3907 IXGBE_WRITE_REG(hw, IXGBE_EIAM_EX(1), 0xFFFFFFFF); 3908 break; 3909 } 3910 } else { 3911 /* legacy interrupts, use EIAM to auto-mask when reading EICR, 3912 * specifically only auto mask tx and rx interrupts */ 3913 IXGBE_WRITE_REG(hw, IXGBE_EIAM, IXGBE_EICS_RTX_QUEUE); 3914 } 3915 3916 /* XXX: to interrupt immediately for EICS writes, enable this */ 3917 /* gpie |= IXGBE_GPIE_EIMEN; */ 3918 3919 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) { 3920 gpie &= ~IXGBE_GPIE_VTMODE_MASK; 3921 gpie |= IXGBE_GPIE_VTMODE_64; 3922 } 3923 3924 /* Enable Thermal over heat sensor interrupt */ 3925 if (adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE) { 3926 switch (adapter->hw.mac.type) { 3927 case ixgbe_mac_82599EB: 3928 gpie |= IXGBE_SDP0_GPIEN; 3929 break; 3930 case ixgbe_mac_X540: 3931 gpie |= IXGBE_EIMS_TS; 3932 break; 3933 default: 3934 break; 3935 } 3936 } 3937 3938 /* Enable fan failure interrupt */ 3939 if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) 3940 gpie |= IXGBE_SDP1_GPIEN; 3941 3942 if (hw->mac.type == ixgbe_mac_82599EB) { 3943 gpie |= IXGBE_SDP1_GPIEN; 3944 gpie |= IXGBE_SDP2_GPIEN; 3945 } 3946 3947 IXGBE_WRITE_REG(hw, IXGBE_GPIE, gpie); 3948 } 3949 3950 static void ixgbe_up_complete(struct ixgbe_adapter *adapter) 3951 { 3952 struct ixgbe_hw *hw = &adapter->hw; 3953 int err; 3954 u32 ctrl_ext; 3955 3956 ixgbe_get_hw_control(adapter); 3957 ixgbe_setup_gpie(adapter); 3958 3959 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) 3960 ixgbe_configure_msix(adapter); 3961 else 3962 ixgbe_configure_msi_and_legacy(adapter); 3963 3964 /* enable the optics for both mult-speed fiber and 82599 SFP+ fiber */ 3965 if (hw->mac.ops.enable_tx_laser && 3966 ((hw->phy.multispeed_fiber) || 3967 ((hw->mac.ops.get_media_type(hw) == ixgbe_media_type_fiber) && 3968 (hw->mac.type == ixgbe_mac_82599EB)))) 3969 hw->mac.ops.enable_tx_laser(hw); 3970 3971 clear_bit(__IXGBE_DOWN, &adapter->state); 3972 ixgbe_napi_enable_all(adapter); 3973 3974 if (ixgbe_is_sfp(hw)) { 3975 ixgbe_sfp_link_config(adapter); 3976 } else { 3977 err = ixgbe_non_sfp_link_config(hw); 3978 if (err) 3979 e_err(probe, "link_config FAILED %d\n", err); 3980 } 3981 3982 /* clear any pending interrupts, may auto mask */ 3983 IXGBE_READ_REG(hw, IXGBE_EICR); 3984 ixgbe_irq_enable(adapter, true, true); 3985 3986 /* 3987 * If this adapter has a fan, check to see if we had a failure 3988 * before we enabled the interrupt. 3989 */ 3990 if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) { 3991 u32 esdp = IXGBE_READ_REG(hw, IXGBE_ESDP); 3992 if (esdp & IXGBE_ESDP_SDP1) 3993 e_crit(drv, "Fan has stopped, replace the adapter\n"); 3994 } 3995 3996 /* enable transmits */ 3997 netif_tx_start_all_queues(adapter->netdev); 3998 3999 /* bring the link up in the watchdog, this could race with our first 4000 * link up interrupt but shouldn't be a problem */ 4001 adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE; 4002 adapter->link_check_timeout = jiffies; 4003 mod_timer(&adapter->service_timer, jiffies); 4004 4005 /* Set PF Reset Done bit so PF/VF Mail Ops can work */ 4006 ctrl_ext = IXGBE_READ_REG(hw, IXGBE_CTRL_EXT); 4007 ctrl_ext |= IXGBE_CTRL_EXT_PFRSTD; 4008 IXGBE_WRITE_REG(hw, IXGBE_CTRL_EXT, ctrl_ext); 4009 } 4010 4011 void ixgbe_reinit_locked(struct ixgbe_adapter *adapter) 4012 { 4013 WARN_ON(in_interrupt()); 4014 /* put off any impending NetWatchDogTimeout */ 4015 adapter->netdev->trans_start = jiffies; 4016 4017 while (test_and_set_bit(__IXGBE_RESETTING, &adapter->state)) 4018 usleep_range(1000, 2000); 4019 ixgbe_down(adapter); 4020 /* 4021 * If SR-IOV enabled then wait a bit before bringing the adapter 4022 * back up to give the VFs time to respond to the reset. The 4023 * two second wait is based upon the watchdog timer cycle in 4024 * the VF driver. 4025 */ 4026 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) 4027 msleep(2000); 4028 ixgbe_up(adapter); 4029 clear_bit(__IXGBE_RESETTING, &adapter->state); 4030 } 4031 4032 void ixgbe_up(struct ixgbe_adapter *adapter) 4033 { 4034 /* hardware has been reset, we need to reload some things */ 4035 ixgbe_configure(adapter); 4036 4037 ixgbe_up_complete(adapter); 4038 } 4039 4040 void ixgbe_reset(struct ixgbe_adapter *adapter) 4041 { 4042 struct ixgbe_hw *hw = &adapter->hw; 4043 int err; 4044 4045 /* lock SFP init bit to prevent race conditions with the watchdog */ 4046 while (test_and_set_bit(__IXGBE_IN_SFP_INIT, &adapter->state)) 4047 usleep_range(1000, 2000); 4048 4049 /* clear all SFP and link config related flags while holding SFP_INIT */ 4050 adapter->flags2 &= ~(IXGBE_FLAG2_SEARCH_FOR_SFP | 4051 IXGBE_FLAG2_SFP_NEEDS_RESET); 4052 adapter->flags &= ~IXGBE_FLAG_NEED_LINK_CONFIG; 4053 4054 err = hw->mac.ops.init_hw(hw); 4055 switch (err) { 4056 case 0: 4057 case IXGBE_ERR_SFP_NOT_PRESENT: 4058 case IXGBE_ERR_SFP_NOT_SUPPORTED: 4059 break; 4060 case IXGBE_ERR_MASTER_REQUESTS_PENDING: 4061 e_dev_err("master disable timed out\n"); 4062 break; 4063 case IXGBE_ERR_EEPROM_VERSION: 4064 /* We are running on a pre-production device, log a warning */ 4065 e_dev_warn("This device is a pre-production adapter/LOM. " 4066 "Please be aware there may be issues associated with " 4067 "your hardware. If you are experiencing problems " 4068 "please contact your Intel or hardware " 4069 "representative who provided you with this " 4070 "hardware.\n"); 4071 break; 4072 default: 4073 e_dev_err("Hardware Error: %d\n", err); 4074 } 4075 4076 clear_bit(__IXGBE_IN_SFP_INIT, &adapter->state); 4077 4078 /* reprogram the RAR[0] in case user changed it. */ 4079 hw->mac.ops.set_rar(hw, 0, hw->mac.addr, adapter->num_vfs, 4080 IXGBE_RAH_AV); 4081 } 4082 4083 /** 4084 * ixgbe_init_rx_page_offset - initialize page offset values for Rx buffers 4085 * @rx_ring: ring to setup 4086 * 4087 * On many IA platforms the L1 cache has a critical stride of 4K, this 4088 * results in each receive buffer starting in the same cache set. To help 4089 * reduce the pressure on this cache set we can interleave the offsets so 4090 * that only every other buffer will be in the same cache set. 4091 **/ 4092 static void ixgbe_init_rx_page_offset(struct ixgbe_ring *rx_ring) 4093 { 4094 struct ixgbe_rx_buffer *rx_buffer = rx_ring->rx_buffer_info; 4095 u16 i; 4096 4097 for (i = 0; i < rx_ring->count; i += 2) { 4098 rx_buffer[0].page_offset = 0; 4099 rx_buffer[1].page_offset = ixgbe_rx_bufsz(rx_ring); 4100 rx_buffer = &rx_buffer[2]; 4101 } 4102 } 4103 4104 /** 4105 * ixgbe_clean_rx_ring - Free Rx Buffers per Queue 4106 * @rx_ring: ring to free buffers from 4107 **/ 4108 static void ixgbe_clean_rx_ring(struct ixgbe_ring *rx_ring) 4109 { 4110 struct device *dev = rx_ring->dev; 4111 unsigned long size; 4112 u16 i; 4113 4114 /* ring already cleared, nothing to do */ 4115 if (!rx_ring->rx_buffer_info) 4116 return; 4117 4118 /* Free all the Rx ring sk_buffs */ 4119 for (i = 0; i < rx_ring->count; i++) { 4120 struct ixgbe_rx_buffer *rx_buffer; 4121 4122 rx_buffer = &rx_ring->rx_buffer_info[i]; 4123 if (rx_buffer->skb) { 4124 struct sk_buff *skb = rx_buffer->skb; 4125 if (IXGBE_CB(skb)->page_released) { 4126 dma_unmap_page(dev, 4127 IXGBE_CB(skb)->dma, 4128 ixgbe_rx_bufsz(rx_ring), 4129 DMA_FROM_DEVICE); 4130 IXGBE_CB(skb)->page_released = false; 4131 } 4132 dev_kfree_skb(skb); 4133 } 4134 rx_buffer->skb = NULL; 4135 if (rx_buffer->dma) 4136 dma_unmap_page(dev, rx_buffer->dma, 4137 ixgbe_rx_pg_size(rx_ring), 4138 DMA_FROM_DEVICE); 4139 rx_buffer->dma = 0; 4140 if (rx_buffer->page) 4141 put_page(rx_buffer->page); 4142 rx_buffer->page = NULL; 4143 } 4144 4145 size = sizeof(struct ixgbe_rx_buffer) * rx_ring->count; 4146 memset(rx_ring->rx_buffer_info, 0, size); 4147 4148 ixgbe_init_rx_page_offset(rx_ring); 4149 4150 /* Zero out the descriptor ring */ 4151 memset(rx_ring->desc, 0, rx_ring->size); 4152 4153 rx_ring->next_to_alloc = 0; 4154 rx_ring->next_to_clean = 0; 4155 rx_ring->next_to_use = 0; 4156 } 4157 4158 /** 4159 * ixgbe_clean_tx_ring - Free Tx Buffers 4160 * @tx_ring: ring to be cleaned 4161 **/ 4162 static void ixgbe_clean_tx_ring(struct ixgbe_ring *tx_ring) 4163 { 4164 struct ixgbe_tx_buffer *tx_buffer_info; 4165 unsigned long size; 4166 u16 i; 4167 4168 /* ring already cleared, nothing to do */ 4169 if (!tx_ring->tx_buffer_info) 4170 return; 4171 4172 /* Free all the Tx ring sk_buffs */ 4173 for (i = 0; i < tx_ring->count; i++) { 4174 tx_buffer_info = &tx_ring->tx_buffer_info[i]; 4175 ixgbe_unmap_and_free_tx_resource(tx_ring, tx_buffer_info); 4176 } 4177 4178 size = sizeof(struct ixgbe_tx_buffer) * tx_ring->count; 4179 memset(tx_ring->tx_buffer_info, 0, size); 4180 4181 /* Zero out the descriptor ring */ 4182 memset(tx_ring->desc, 0, tx_ring->size); 4183 4184 tx_ring->next_to_use = 0; 4185 tx_ring->next_to_clean = 0; 4186 } 4187 4188 /** 4189 * ixgbe_clean_all_rx_rings - Free Rx Buffers for all queues 4190 * @adapter: board private structure 4191 **/ 4192 static void ixgbe_clean_all_rx_rings(struct ixgbe_adapter *adapter) 4193 { 4194 int i; 4195 4196 for (i = 0; i < adapter->num_rx_queues; i++) 4197 ixgbe_clean_rx_ring(adapter->rx_ring[i]); 4198 } 4199 4200 /** 4201 * ixgbe_clean_all_tx_rings - Free Tx Buffers for all queues 4202 * @adapter: board private structure 4203 **/ 4204 static void ixgbe_clean_all_tx_rings(struct ixgbe_adapter *adapter) 4205 { 4206 int i; 4207 4208 for (i = 0; i < adapter->num_tx_queues; i++) 4209 ixgbe_clean_tx_ring(adapter->tx_ring[i]); 4210 } 4211 4212 static void ixgbe_fdir_filter_exit(struct ixgbe_adapter *adapter) 4213 { 4214 struct hlist_node *node, *node2; 4215 struct ixgbe_fdir_filter *filter; 4216 4217 spin_lock(&adapter->fdir_perfect_lock); 4218 4219 hlist_for_each_entry_safe(filter, node, node2, 4220 &adapter->fdir_filter_list, fdir_node) { 4221 hlist_del(&filter->fdir_node); 4222 kfree(filter); 4223 } 4224 adapter->fdir_filter_count = 0; 4225 4226 spin_unlock(&adapter->fdir_perfect_lock); 4227 } 4228 4229 void ixgbe_down(struct ixgbe_adapter *adapter) 4230 { 4231 struct net_device *netdev = adapter->netdev; 4232 struct ixgbe_hw *hw = &adapter->hw; 4233 u32 rxctrl; 4234 int i; 4235 4236 /* signal that we are down to the interrupt handler */ 4237 set_bit(__IXGBE_DOWN, &adapter->state); 4238 4239 /* disable receives */ 4240 rxctrl = IXGBE_READ_REG(hw, IXGBE_RXCTRL); 4241 IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, rxctrl & ~IXGBE_RXCTRL_RXEN); 4242 4243 /* disable all enabled rx queues */ 4244 for (i = 0; i < adapter->num_rx_queues; i++) 4245 /* this call also flushes the previous write */ 4246 ixgbe_disable_rx_queue(adapter, adapter->rx_ring[i]); 4247 4248 usleep_range(10000, 20000); 4249 4250 netif_tx_stop_all_queues(netdev); 4251 4252 /* call carrier off first to avoid false dev_watchdog timeouts */ 4253 netif_carrier_off(netdev); 4254 netif_tx_disable(netdev); 4255 4256 ixgbe_irq_disable(adapter); 4257 4258 ixgbe_napi_disable_all(adapter); 4259 4260 adapter->flags2 &= ~(IXGBE_FLAG2_FDIR_REQUIRES_REINIT | 4261 IXGBE_FLAG2_RESET_REQUESTED); 4262 adapter->flags &= ~IXGBE_FLAG_NEED_LINK_UPDATE; 4263 4264 del_timer_sync(&adapter->service_timer); 4265 4266 if (adapter->num_vfs) { 4267 /* Clear EITR Select mapping */ 4268 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EITRSEL, 0); 4269 4270 /* Mark all the VFs as inactive */ 4271 for (i = 0 ; i < adapter->num_vfs; i++) 4272 adapter->vfinfo[i].clear_to_send = false; 4273 4274 /* ping all the active vfs to let them know we are going down */ 4275 ixgbe_ping_all_vfs(adapter); 4276 4277 /* Disable all VFTE/VFRE TX/RX */ 4278 ixgbe_disable_tx_rx(adapter); 4279 } 4280 4281 /* disable transmits in the hardware now that interrupts are off */ 4282 for (i = 0; i < adapter->num_tx_queues; i++) { 4283 u8 reg_idx = adapter->tx_ring[i]->reg_idx; 4284 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(reg_idx), IXGBE_TXDCTL_SWFLSH); 4285 } 4286 4287 /* Disable the Tx DMA engine on 82599 and X540 */ 4288 switch (hw->mac.type) { 4289 case ixgbe_mac_82599EB: 4290 case ixgbe_mac_X540: 4291 IXGBE_WRITE_REG(hw, IXGBE_DMATXCTL, 4292 (IXGBE_READ_REG(hw, IXGBE_DMATXCTL) & 4293 ~IXGBE_DMATXCTL_TE)); 4294 break; 4295 default: 4296 break; 4297 } 4298 4299 if (!pci_channel_offline(adapter->pdev)) 4300 ixgbe_reset(adapter); 4301 4302 /* power down the optics for multispeed fiber and 82599 SFP+ fiber */ 4303 if (hw->mac.ops.disable_tx_laser && 4304 ((hw->phy.multispeed_fiber) || 4305 ((hw->mac.ops.get_media_type(hw) == ixgbe_media_type_fiber) && 4306 (hw->mac.type == ixgbe_mac_82599EB)))) 4307 hw->mac.ops.disable_tx_laser(hw); 4308 4309 ixgbe_clean_all_tx_rings(adapter); 4310 ixgbe_clean_all_rx_rings(adapter); 4311 4312 #ifdef CONFIG_IXGBE_DCA 4313 /* since we reset the hardware DCA settings were cleared */ 4314 ixgbe_setup_dca(adapter); 4315 #endif 4316 } 4317 4318 /** 4319 * ixgbe_tx_timeout - Respond to a Tx Hang 4320 * @netdev: network interface device structure 4321 **/ 4322 static void ixgbe_tx_timeout(struct net_device *netdev) 4323 { 4324 struct ixgbe_adapter *adapter = netdev_priv(netdev); 4325 4326 /* Do the reset outside of interrupt context */ 4327 ixgbe_tx_timeout_reset(adapter); 4328 } 4329 4330 /** 4331 * ixgbe_sw_init - Initialize general software structures (struct ixgbe_adapter) 4332 * @adapter: board private structure to initialize 4333 * 4334 * ixgbe_sw_init initializes the Adapter private data structure. 4335 * Fields are initialized based on PCI device information and 4336 * OS network device settings (MTU size). 4337 **/ 4338 static int __devinit ixgbe_sw_init(struct ixgbe_adapter *adapter) 4339 { 4340 struct ixgbe_hw *hw = &adapter->hw; 4341 struct pci_dev *pdev = adapter->pdev; 4342 unsigned int rss; 4343 #ifdef CONFIG_IXGBE_DCB 4344 int j; 4345 struct tc_configuration *tc; 4346 #endif 4347 4348 /* PCI config space info */ 4349 4350 hw->vendor_id = pdev->vendor; 4351 hw->device_id = pdev->device; 4352 hw->revision_id = pdev->revision; 4353 hw->subsystem_vendor_id = pdev->subsystem_vendor; 4354 hw->subsystem_device_id = pdev->subsystem_device; 4355 4356 /* Set capability flags */ 4357 rss = min_t(int, IXGBE_MAX_RSS_INDICES, num_online_cpus()); 4358 adapter->ring_feature[RING_F_RSS].indices = rss; 4359 adapter->flags |= IXGBE_FLAG_RSS_ENABLED; 4360 switch (hw->mac.type) { 4361 case ixgbe_mac_82598EB: 4362 if (hw->device_id == IXGBE_DEV_ID_82598AT) 4363 adapter->flags |= IXGBE_FLAG_FAN_FAIL_CAPABLE; 4364 adapter->max_msix_q_vectors = MAX_MSIX_Q_VECTORS_82598; 4365 break; 4366 case ixgbe_mac_X540: 4367 adapter->flags2 |= IXGBE_FLAG2_TEMP_SENSOR_CAPABLE; 4368 case ixgbe_mac_82599EB: 4369 adapter->max_msix_q_vectors = MAX_MSIX_Q_VECTORS_82599; 4370 adapter->flags2 |= IXGBE_FLAG2_RSC_CAPABLE; 4371 adapter->flags2 |= IXGBE_FLAG2_RSC_ENABLED; 4372 if (hw->device_id == IXGBE_DEV_ID_82599_T3_LOM) 4373 adapter->flags2 |= IXGBE_FLAG2_TEMP_SENSOR_CAPABLE; 4374 /* Flow Director hash filters enabled */ 4375 adapter->flags |= IXGBE_FLAG_FDIR_HASH_CAPABLE; 4376 adapter->atr_sample_rate = 20; 4377 adapter->ring_feature[RING_F_FDIR].indices = 4378 IXGBE_MAX_FDIR_INDICES; 4379 adapter->fdir_pballoc = IXGBE_FDIR_PBALLOC_64K; 4380 #ifdef IXGBE_FCOE 4381 adapter->flags |= IXGBE_FLAG_FCOE_CAPABLE; 4382 adapter->flags &= ~IXGBE_FLAG_FCOE_ENABLED; 4383 adapter->ring_feature[RING_F_FCOE].indices = 0; 4384 #ifdef CONFIG_IXGBE_DCB 4385 /* Default traffic class to use for FCoE */ 4386 adapter->fcoe.up = IXGBE_FCOE_DEFTC; 4387 #endif 4388 #endif /* IXGBE_FCOE */ 4389 break; 4390 default: 4391 break; 4392 } 4393 4394 /* n-tuple support exists, always init our spinlock */ 4395 spin_lock_init(&adapter->fdir_perfect_lock); 4396 4397 #ifdef CONFIG_IXGBE_DCB 4398 switch (hw->mac.type) { 4399 case ixgbe_mac_X540: 4400 adapter->dcb_cfg.num_tcs.pg_tcs = X540_TRAFFIC_CLASS; 4401 adapter->dcb_cfg.num_tcs.pfc_tcs = X540_TRAFFIC_CLASS; 4402 break; 4403 default: 4404 adapter->dcb_cfg.num_tcs.pg_tcs = MAX_TRAFFIC_CLASS; 4405 adapter->dcb_cfg.num_tcs.pfc_tcs = MAX_TRAFFIC_CLASS; 4406 break; 4407 } 4408 4409 /* Configure DCB traffic classes */ 4410 for (j = 0; j < MAX_TRAFFIC_CLASS; j++) { 4411 tc = &adapter->dcb_cfg.tc_config[j]; 4412 tc->path[DCB_TX_CONFIG].bwg_id = 0; 4413 tc->path[DCB_TX_CONFIG].bwg_percent = 12 + (j & 1); 4414 tc->path[DCB_RX_CONFIG].bwg_id = 0; 4415 tc->path[DCB_RX_CONFIG].bwg_percent = 12 + (j & 1); 4416 tc->dcb_pfc = pfc_disabled; 4417 } 4418 4419 /* Initialize default user to priority mapping, UPx->TC0 */ 4420 tc = &adapter->dcb_cfg.tc_config[0]; 4421 tc->path[DCB_TX_CONFIG].up_to_tc_bitmap = 0xFF; 4422 tc->path[DCB_RX_CONFIG].up_to_tc_bitmap = 0xFF; 4423 4424 adapter->dcb_cfg.bw_percentage[DCB_TX_CONFIG][0] = 100; 4425 adapter->dcb_cfg.bw_percentage[DCB_RX_CONFIG][0] = 100; 4426 adapter->dcb_cfg.pfc_mode_enable = false; 4427 adapter->dcb_set_bitmap = 0x00; 4428 adapter->dcbx_cap = DCB_CAP_DCBX_HOST | DCB_CAP_DCBX_VER_CEE; 4429 ixgbe_copy_dcb_cfg(&adapter->dcb_cfg, &adapter->temp_dcb_cfg, 4430 MAX_TRAFFIC_CLASS); 4431 4432 #endif 4433 4434 /* default flow control settings */ 4435 hw->fc.requested_mode = ixgbe_fc_full; 4436 hw->fc.current_mode = ixgbe_fc_full; /* init for ethtool output */ 4437 #ifdef CONFIG_DCB 4438 adapter->last_lfc_mode = hw->fc.current_mode; 4439 #endif 4440 ixgbe_pbthresh_setup(adapter); 4441 hw->fc.pause_time = IXGBE_DEFAULT_FCPAUSE; 4442 hw->fc.send_xon = true; 4443 hw->fc.disable_fc_autoneg = false; 4444 4445 /* enable itr by default in dynamic mode */ 4446 adapter->rx_itr_setting = 1; 4447 adapter->tx_itr_setting = 1; 4448 4449 /* set default ring sizes */ 4450 adapter->tx_ring_count = IXGBE_DEFAULT_TXD; 4451 adapter->rx_ring_count = IXGBE_DEFAULT_RXD; 4452 4453 /* set default work limits */ 4454 adapter->tx_work_limit = IXGBE_DEFAULT_TX_WORK; 4455 4456 /* initialize eeprom parameters */ 4457 if (ixgbe_init_eeprom_params_generic(hw)) { 4458 e_dev_err("EEPROM initialization failed\n"); 4459 return -EIO; 4460 } 4461 4462 set_bit(__IXGBE_DOWN, &adapter->state); 4463 4464 return 0; 4465 } 4466 4467 /** 4468 * ixgbe_setup_tx_resources - allocate Tx resources (Descriptors) 4469 * @tx_ring: tx descriptor ring (for a specific queue) to setup 4470 * 4471 * Return 0 on success, negative on failure 4472 **/ 4473 int ixgbe_setup_tx_resources(struct ixgbe_ring *tx_ring) 4474 { 4475 struct device *dev = tx_ring->dev; 4476 int orig_node = dev_to_node(dev); 4477 int numa_node = -1; 4478 int size; 4479 4480 size = sizeof(struct ixgbe_tx_buffer) * tx_ring->count; 4481 4482 if (tx_ring->q_vector) 4483 numa_node = tx_ring->q_vector->numa_node; 4484 4485 tx_ring->tx_buffer_info = vzalloc_node(size, numa_node); 4486 if (!tx_ring->tx_buffer_info) 4487 tx_ring->tx_buffer_info = vzalloc(size); 4488 if (!tx_ring->tx_buffer_info) 4489 goto err; 4490 4491 /* round up to nearest 4K */ 4492 tx_ring->size = tx_ring->count * sizeof(union ixgbe_adv_tx_desc); 4493 tx_ring->size = ALIGN(tx_ring->size, 4096); 4494 4495 set_dev_node(dev, numa_node); 4496 tx_ring->desc = dma_alloc_coherent(dev, 4497 tx_ring->size, 4498 &tx_ring->dma, 4499 GFP_KERNEL); 4500 set_dev_node(dev, orig_node); 4501 if (!tx_ring->desc) 4502 tx_ring->desc = dma_alloc_coherent(dev, tx_ring->size, 4503 &tx_ring->dma, GFP_KERNEL); 4504 if (!tx_ring->desc) 4505 goto err; 4506 4507 tx_ring->next_to_use = 0; 4508 tx_ring->next_to_clean = 0; 4509 return 0; 4510 4511 err: 4512 vfree(tx_ring->tx_buffer_info); 4513 tx_ring->tx_buffer_info = NULL; 4514 dev_err(dev, "Unable to allocate memory for the Tx descriptor ring\n"); 4515 return -ENOMEM; 4516 } 4517 4518 /** 4519 * ixgbe_setup_all_tx_resources - allocate all queues Tx resources 4520 * @adapter: board private structure 4521 * 4522 * If this function returns with an error, then it's possible one or 4523 * more of the rings is populated (while the rest are not). It is the 4524 * callers duty to clean those orphaned rings. 4525 * 4526 * Return 0 on success, negative on failure 4527 **/ 4528 static int ixgbe_setup_all_tx_resources(struct ixgbe_adapter *adapter) 4529 { 4530 int i, err = 0; 4531 4532 for (i = 0; i < adapter->num_tx_queues; i++) { 4533 err = ixgbe_setup_tx_resources(adapter->tx_ring[i]); 4534 if (!err) 4535 continue; 4536 e_err(probe, "Allocation for Tx Queue %u failed\n", i); 4537 break; 4538 } 4539 4540 return err; 4541 } 4542 4543 /** 4544 * ixgbe_setup_rx_resources - allocate Rx resources (Descriptors) 4545 * @rx_ring: rx descriptor ring (for a specific queue) to setup 4546 * 4547 * Returns 0 on success, negative on failure 4548 **/ 4549 int ixgbe_setup_rx_resources(struct ixgbe_ring *rx_ring) 4550 { 4551 struct device *dev = rx_ring->dev; 4552 int orig_node = dev_to_node(dev); 4553 int numa_node = -1; 4554 int size; 4555 4556 size = sizeof(struct ixgbe_rx_buffer) * rx_ring->count; 4557 4558 if (rx_ring->q_vector) 4559 numa_node = rx_ring->q_vector->numa_node; 4560 4561 rx_ring->rx_buffer_info = vzalloc_node(size, numa_node); 4562 if (!rx_ring->rx_buffer_info) 4563 rx_ring->rx_buffer_info = vzalloc(size); 4564 if (!rx_ring->rx_buffer_info) 4565 goto err; 4566 4567 /* Round up to nearest 4K */ 4568 rx_ring->size = rx_ring->count * sizeof(union ixgbe_adv_rx_desc); 4569 rx_ring->size = ALIGN(rx_ring->size, 4096); 4570 4571 set_dev_node(dev, numa_node); 4572 rx_ring->desc = dma_alloc_coherent(dev, 4573 rx_ring->size, 4574 &rx_ring->dma, 4575 GFP_KERNEL); 4576 set_dev_node(dev, orig_node); 4577 if (!rx_ring->desc) 4578 rx_ring->desc = dma_alloc_coherent(dev, rx_ring->size, 4579 &rx_ring->dma, GFP_KERNEL); 4580 if (!rx_ring->desc) 4581 goto err; 4582 4583 rx_ring->next_to_clean = 0; 4584 rx_ring->next_to_use = 0; 4585 4586 ixgbe_init_rx_page_offset(rx_ring); 4587 4588 return 0; 4589 err: 4590 vfree(rx_ring->rx_buffer_info); 4591 rx_ring->rx_buffer_info = NULL; 4592 dev_err(dev, "Unable to allocate memory for the Rx descriptor ring\n"); 4593 return -ENOMEM; 4594 } 4595 4596 /** 4597 * ixgbe_setup_all_rx_resources - allocate all queues Rx resources 4598 * @adapter: board private structure 4599 * 4600 * If this function returns with an error, then it's possible one or 4601 * more of the rings is populated (while the rest are not). It is the 4602 * callers duty to clean those orphaned rings. 4603 * 4604 * Return 0 on success, negative on failure 4605 **/ 4606 static int ixgbe_setup_all_rx_resources(struct ixgbe_adapter *adapter) 4607 { 4608 int i, err = 0; 4609 4610 for (i = 0; i < adapter->num_rx_queues; i++) { 4611 err = ixgbe_setup_rx_resources(adapter->rx_ring[i]); 4612 if (!err) 4613 continue; 4614 e_err(probe, "Allocation for Rx Queue %u failed\n", i); 4615 break; 4616 } 4617 4618 return err; 4619 } 4620 4621 /** 4622 * ixgbe_free_tx_resources - Free Tx Resources per Queue 4623 * @tx_ring: Tx descriptor ring for a specific queue 4624 * 4625 * Free all transmit software resources 4626 **/ 4627 void ixgbe_free_tx_resources(struct ixgbe_ring *tx_ring) 4628 { 4629 ixgbe_clean_tx_ring(tx_ring); 4630 4631 vfree(tx_ring->tx_buffer_info); 4632 tx_ring->tx_buffer_info = NULL; 4633 4634 /* if not set, then don't free */ 4635 if (!tx_ring->desc) 4636 return; 4637 4638 dma_free_coherent(tx_ring->dev, tx_ring->size, 4639 tx_ring->desc, tx_ring->dma); 4640 4641 tx_ring->desc = NULL; 4642 } 4643 4644 /** 4645 * ixgbe_free_all_tx_resources - Free Tx Resources for All Queues 4646 * @adapter: board private structure 4647 * 4648 * Free all transmit software resources 4649 **/ 4650 static void ixgbe_free_all_tx_resources(struct ixgbe_adapter *adapter) 4651 { 4652 int i; 4653 4654 for (i = 0; i < adapter->num_tx_queues; i++) 4655 if (adapter->tx_ring[i]->desc) 4656 ixgbe_free_tx_resources(adapter->tx_ring[i]); 4657 } 4658 4659 /** 4660 * ixgbe_free_rx_resources - Free Rx Resources 4661 * @rx_ring: ring to clean the resources from 4662 * 4663 * Free all receive software resources 4664 **/ 4665 void ixgbe_free_rx_resources(struct ixgbe_ring *rx_ring) 4666 { 4667 ixgbe_clean_rx_ring(rx_ring); 4668 4669 vfree(rx_ring->rx_buffer_info); 4670 rx_ring->rx_buffer_info = NULL; 4671 4672 /* if not set, then don't free */ 4673 if (!rx_ring->desc) 4674 return; 4675 4676 dma_free_coherent(rx_ring->dev, rx_ring->size, 4677 rx_ring->desc, rx_ring->dma); 4678 4679 rx_ring->desc = NULL; 4680 } 4681 4682 /** 4683 * ixgbe_free_all_rx_resources - Free Rx Resources for All Queues 4684 * @adapter: board private structure 4685 * 4686 * Free all receive software resources 4687 **/ 4688 static void ixgbe_free_all_rx_resources(struct ixgbe_adapter *adapter) 4689 { 4690 int i; 4691 4692 for (i = 0; i < adapter->num_rx_queues; i++) 4693 if (adapter->rx_ring[i]->desc) 4694 ixgbe_free_rx_resources(adapter->rx_ring[i]); 4695 } 4696 4697 /** 4698 * ixgbe_change_mtu - Change the Maximum Transfer Unit 4699 * @netdev: network interface device structure 4700 * @new_mtu: new value for maximum frame size 4701 * 4702 * Returns 0 on success, negative on failure 4703 **/ 4704 static int ixgbe_change_mtu(struct net_device *netdev, int new_mtu) 4705 { 4706 struct ixgbe_adapter *adapter = netdev_priv(netdev); 4707 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN; 4708 4709 /* MTU < 68 is an error and causes problems on some kernels */ 4710 if ((new_mtu < 68) || (max_frame > IXGBE_MAX_JUMBO_FRAME_SIZE)) 4711 return -EINVAL; 4712 4713 /* 4714 * For 82599EB we cannot allow PF to change MTU greater than 1500 4715 * in SR-IOV mode as it may cause buffer overruns in guest VFs that 4716 * don't allocate and chain buffers correctly. 4717 */ 4718 if ((adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) && 4719 (adapter->hw.mac.type == ixgbe_mac_82599EB) && 4720 (max_frame > MAXIMUM_ETHERNET_VLAN_SIZE)) 4721 return -EINVAL; 4722 4723 e_info(probe, "changing MTU from %d to %d\n", netdev->mtu, new_mtu); 4724 4725 /* must set new MTU before calling down or up */ 4726 netdev->mtu = new_mtu; 4727 4728 if (netif_running(netdev)) 4729 ixgbe_reinit_locked(adapter); 4730 4731 return 0; 4732 } 4733 4734 /** 4735 * ixgbe_open - Called when a network interface is made active 4736 * @netdev: network interface device structure 4737 * 4738 * Returns 0 on success, negative value on failure 4739 * 4740 * The open entry point is called when a network interface is made 4741 * active by the system (IFF_UP). At this point all resources needed 4742 * for transmit and receive operations are allocated, the interrupt 4743 * handler is registered with the OS, the watchdog timer is started, 4744 * and the stack is notified that the interface is ready. 4745 **/ 4746 static int ixgbe_open(struct net_device *netdev) 4747 { 4748 struct ixgbe_adapter *adapter = netdev_priv(netdev); 4749 int err; 4750 4751 /* disallow open during test */ 4752 if (test_bit(__IXGBE_TESTING, &adapter->state)) 4753 return -EBUSY; 4754 4755 netif_carrier_off(netdev); 4756 4757 /* allocate transmit descriptors */ 4758 err = ixgbe_setup_all_tx_resources(adapter); 4759 if (err) 4760 goto err_setup_tx; 4761 4762 /* allocate receive descriptors */ 4763 err = ixgbe_setup_all_rx_resources(adapter); 4764 if (err) 4765 goto err_setup_rx; 4766 4767 ixgbe_configure(adapter); 4768 4769 err = ixgbe_request_irq(adapter); 4770 if (err) 4771 goto err_req_irq; 4772 4773 ixgbe_up_complete(adapter); 4774 4775 return 0; 4776 4777 err_req_irq: 4778 err_setup_rx: 4779 ixgbe_free_all_rx_resources(adapter); 4780 err_setup_tx: 4781 ixgbe_free_all_tx_resources(adapter); 4782 ixgbe_reset(adapter); 4783 4784 return err; 4785 } 4786 4787 /** 4788 * ixgbe_close - Disables a network interface 4789 * @netdev: network interface device structure 4790 * 4791 * Returns 0, this is not allowed to fail 4792 * 4793 * The close entry point is called when an interface is de-activated 4794 * by the OS. The hardware is still under the drivers control, but 4795 * needs to be disabled. A global MAC reset is issued to stop the 4796 * hardware, and all transmit and receive resources are freed. 4797 **/ 4798 static int ixgbe_close(struct net_device *netdev) 4799 { 4800 struct ixgbe_adapter *adapter = netdev_priv(netdev); 4801 4802 ixgbe_down(adapter); 4803 ixgbe_free_irq(adapter); 4804 4805 ixgbe_fdir_filter_exit(adapter); 4806 4807 ixgbe_free_all_tx_resources(adapter); 4808 ixgbe_free_all_rx_resources(adapter); 4809 4810 ixgbe_release_hw_control(adapter); 4811 4812 return 0; 4813 } 4814 4815 #ifdef CONFIG_PM 4816 static int ixgbe_resume(struct pci_dev *pdev) 4817 { 4818 struct ixgbe_adapter *adapter = pci_get_drvdata(pdev); 4819 struct net_device *netdev = adapter->netdev; 4820 u32 err; 4821 4822 pci_set_power_state(pdev, PCI_D0); 4823 pci_restore_state(pdev); 4824 /* 4825 * pci_restore_state clears dev->state_saved so call 4826 * pci_save_state to restore it. 4827 */ 4828 pci_save_state(pdev); 4829 4830 err = pci_enable_device_mem(pdev); 4831 if (err) { 4832 e_dev_err("Cannot enable PCI device from suspend\n"); 4833 return err; 4834 } 4835 pci_set_master(pdev); 4836 4837 pci_wake_from_d3(pdev, false); 4838 4839 err = ixgbe_init_interrupt_scheme(adapter); 4840 if (err) { 4841 e_dev_err("Cannot initialize interrupts for device\n"); 4842 return err; 4843 } 4844 4845 ixgbe_reset(adapter); 4846 4847 IXGBE_WRITE_REG(&adapter->hw, IXGBE_WUS, ~0); 4848 4849 if (netif_running(netdev)) { 4850 err = ixgbe_open(netdev); 4851 if (err) 4852 return err; 4853 } 4854 4855 netif_device_attach(netdev); 4856 4857 return 0; 4858 } 4859 #endif /* CONFIG_PM */ 4860 4861 static int __ixgbe_shutdown(struct pci_dev *pdev, bool *enable_wake) 4862 { 4863 struct ixgbe_adapter *adapter = pci_get_drvdata(pdev); 4864 struct net_device *netdev = adapter->netdev; 4865 struct ixgbe_hw *hw = &adapter->hw; 4866 u32 ctrl, fctrl; 4867 u32 wufc = adapter->wol; 4868 #ifdef CONFIG_PM 4869 int retval = 0; 4870 #endif 4871 4872 netif_device_detach(netdev); 4873 4874 if (netif_running(netdev)) { 4875 ixgbe_down(adapter); 4876 ixgbe_free_irq(adapter); 4877 ixgbe_free_all_tx_resources(adapter); 4878 ixgbe_free_all_rx_resources(adapter); 4879 } 4880 4881 ixgbe_clear_interrupt_scheme(adapter); 4882 #ifdef CONFIG_DCB 4883 kfree(adapter->ixgbe_ieee_pfc); 4884 kfree(adapter->ixgbe_ieee_ets); 4885 #endif 4886 4887 #ifdef CONFIG_PM 4888 retval = pci_save_state(pdev); 4889 if (retval) 4890 return retval; 4891 4892 #endif 4893 if (wufc) { 4894 ixgbe_set_rx_mode(netdev); 4895 4896 /* turn on all-multi mode if wake on multicast is enabled */ 4897 if (wufc & IXGBE_WUFC_MC) { 4898 fctrl = IXGBE_READ_REG(hw, IXGBE_FCTRL); 4899 fctrl |= IXGBE_FCTRL_MPE; 4900 IXGBE_WRITE_REG(hw, IXGBE_FCTRL, fctrl); 4901 } 4902 4903 ctrl = IXGBE_READ_REG(hw, IXGBE_CTRL); 4904 ctrl |= IXGBE_CTRL_GIO_DIS; 4905 IXGBE_WRITE_REG(hw, IXGBE_CTRL, ctrl); 4906 4907 IXGBE_WRITE_REG(hw, IXGBE_WUFC, wufc); 4908 } else { 4909 IXGBE_WRITE_REG(hw, IXGBE_WUC, 0); 4910 IXGBE_WRITE_REG(hw, IXGBE_WUFC, 0); 4911 } 4912 4913 switch (hw->mac.type) { 4914 case ixgbe_mac_82598EB: 4915 pci_wake_from_d3(pdev, false); 4916 break; 4917 case ixgbe_mac_82599EB: 4918 case ixgbe_mac_X540: 4919 pci_wake_from_d3(pdev, !!wufc); 4920 break; 4921 default: 4922 break; 4923 } 4924 4925 *enable_wake = !!wufc; 4926 4927 ixgbe_release_hw_control(adapter); 4928 4929 pci_disable_device(pdev); 4930 4931 return 0; 4932 } 4933 4934 #ifdef CONFIG_PM 4935 static int ixgbe_suspend(struct pci_dev *pdev, pm_message_t state) 4936 { 4937 int retval; 4938 bool wake; 4939 4940 retval = __ixgbe_shutdown(pdev, &wake); 4941 if (retval) 4942 return retval; 4943 4944 if (wake) { 4945 pci_prepare_to_sleep(pdev); 4946 } else { 4947 pci_wake_from_d3(pdev, false); 4948 pci_set_power_state(pdev, PCI_D3hot); 4949 } 4950 4951 return 0; 4952 } 4953 #endif /* CONFIG_PM */ 4954 4955 static void ixgbe_shutdown(struct pci_dev *pdev) 4956 { 4957 bool wake; 4958 4959 __ixgbe_shutdown(pdev, &wake); 4960 4961 if (system_state == SYSTEM_POWER_OFF) { 4962 pci_wake_from_d3(pdev, wake); 4963 pci_set_power_state(pdev, PCI_D3hot); 4964 } 4965 } 4966 4967 /** 4968 * ixgbe_update_stats - Update the board statistics counters. 4969 * @adapter: board private structure 4970 **/ 4971 void ixgbe_update_stats(struct ixgbe_adapter *adapter) 4972 { 4973 struct net_device *netdev = adapter->netdev; 4974 struct ixgbe_hw *hw = &adapter->hw; 4975 struct ixgbe_hw_stats *hwstats = &adapter->stats; 4976 u64 total_mpc = 0; 4977 u32 i, missed_rx = 0, mpc, bprc, lxon, lxoff, xon_off_tot; 4978 u64 non_eop_descs = 0, restart_queue = 0, tx_busy = 0; 4979 u64 alloc_rx_page_failed = 0, alloc_rx_buff_failed = 0; 4980 u64 bytes = 0, packets = 0, hw_csum_rx_error = 0; 4981 #ifdef IXGBE_FCOE 4982 struct ixgbe_fcoe *fcoe = &adapter->fcoe; 4983 unsigned int cpu; 4984 u64 fcoe_noddp_counts_sum = 0, fcoe_noddp_ext_buff_counts_sum = 0; 4985 #endif /* IXGBE_FCOE */ 4986 4987 if (test_bit(__IXGBE_DOWN, &adapter->state) || 4988 test_bit(__IXGBE_RESETTING, &adapter->state)) 4989 return; 4990 4991 if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED) { 4992 u64 rsc_count = 0; 4993 u64 rsc_flush = 0; 4994 for (i = 0; i < 16; i++) 4995 adapter->hw_rx_no_dma_resources += 4996 IXGBE_READ_REG(hw, IXGBE_QPRDC(i)); 4997 for (i = 0; i < adapter->num_rx_queues; i++) { 4998 rsc_count += adapter->rx_ring[i]->rx_stats.rsc_count; 4999 rsc_flush += adapter->rx_ring[i]->rx_stats.rsc_flush; 5000 } 5001 adapter->rsc_total_count = rsc_count; 5002 adapter->rsc_total_flush = rsc_flush; 5003 } 5004 5005 for (i = 0; i < adapter->num_rx_queues; i++) { 5006 struct ixgbe_ring *rx_ring = adapter->rx_ring[i]; 5007 non_eop_descs += rx_ring->rx_stats.non_eop_descs; 5008 alloc_rx_page_failed += rx_ring->rx_stats.alloc_rx_page_failed; 5009 alloc_rx_buff_failed += rx_ring->rx_stats.alloc_rx_buff_failed; 5010 hw_csum_rx_error += rx_ring->rx_stats.csum_err; 5011 bytes += rx_ring->stats.bytes; 5012 packets += rx_ring->stats.packets; 5013 } 5014 adapter->non_eop_descs = non_eop_descs; 5015 adapter->alloc_rx_page_failed = alloc_rx_page_failed; 5016 adapter->alloc_rx_buff_failed = alloc_rx_buff_failed; 5017 adapter->hw_csum_rx_error = hw_csum_rx_error; 5018 netdev->stats.rx_bytes = bytes; 5019 netdev->stats.rx_packets = packets; 5020 5021 bytes = 0; 5022 packets = 0; 5023 /* gather some stats to the adapter struct that are per queue */ 5024 for (i = 0; i < adapter->num_tx_queues; i++) { 5025 struct ixgbe_ring *tx_ring = adapter->tx_ring[i]; 5026 restart_queue += tx_ring->tx_stats.restart_queue; 5027 tx_busy += tx_ring->tx_stats.tx_busy; 5028 bytes += tx_ring->stats.bytes; 5029 packets += tx_ring->stats.packets; 5030 } 5031 adapter->restart_queue = restart_queue; 5032 adapter->tx_busy = tx_busy; 5033 netdev->stats.tx_bytes = bytes; 5034 netdev->stats.tx_packets = packets; 5035 5036 hwstats->crcerrs += IXGBE_READ_REG(hw, IXGBE_CRCERRS); 5037 5038 /* 8 register reads */ 5039 for (i = 0; i < 8; i++) { 5040 /* for packet buffers not used, the register should read 0 */ 5041 mpc = IXGBE_READ_REG(hw, IXGBE_MPC(i)); 5042 missed_rx += mpc; 5043 hwstats->mpc[i] += mpc; 5044 total_mpc += hwstats->mpc[i]; 5045 hwstats->pxontxc[i] += IXGBE_READ_REG(hw, IXGBE_PXONTXC(i)); 5046 hwstats->pxofftxc[i] += IXGBE_READ_REG(hw, IXGBE_PXOFFTXC(i)); 5047 switch (hw->mac.type) { 5048 case ixgbe_mac_82598EB: 5049 hwstats->rnbc[i] += IXGBE_READ_REG(hw, IXGBE_RNBC(i)); 5050 hwstats->qbtc[i] += IXGBE_READ_REG(hw, IXGBE_QBTC(i)); 5051 hwstats->qbrc[i] += IXGBE_READ_REG(hw, IXGBE_QBRC(i)); 5052 hwstats->pxonrxc[i] += 5053 IXGBE_READ_REG(hw, IXGBE_PXONRXC(i)); 5054 break; 5055 case ixgbe_mac_82599EB: 5056 case ixgbe_mac_X540: 5057 hwstats->pxonrxc[i] += 5058 IXGBE_READ_REG(hw, IXGBE_PXONRXCNT(i)); 5059 break; 5060 default: 5061 break; 5062 } 5063 } 5064 5065 /*16 register reads */ 5066 for (i = 0; i < 16; i++) { 5067 hwstats->qptc[i] += IXGBE_READ_REG(hw, IXGBE_QPTC(i)); 5068 hwstats->qprc[i] += IXGBE_READ_REG(hw, IXGBE_QPRC(i)); 5069 if ((hw->mac.type == ixgbe_mac_82599EB) || 5070 (hw->mac.type == ixgbe_mac_X540)) { 5071 hwstats->qbtc[i] += IXGBE_READ_REG(hw, IXGBE_QBTC_L(i)); 5072 IXGBE_READ_REG(hw, IXGBE_QBTC_H(i)); /* to clear */ 5073 hwstats->qbrc[i] += IXGBE_READ_REG(hw, IXGBE_QBRC_L(i)); 5074 IXGBE_READ_REG(hw, IXGBE_QBRC_H(i)); /* to clear */ 5075 } 5076 } 5077 5078 hwstats->gprc += IXGBE_READ_REG(hw, IXGBE_GPRC); 5079 /* work around hardware counting issue */ 5080 hwstats->gprc -= missed_rx; 5081 5082 ixgbe_update_xoff_received(adapter); 5083 5084 /* 82598 hardware only has a 32 bit counter in the high register */ 5085 switch (hw->mac.type) { 5086 case ixgbe_mac_82598EB: 5087 hwstats->lxonrxc += IXGBE_READ_REG(hw, IXGBE_LXONRXC); 5088 hwstats->gorc += IXGBE_READ_REG(hw, IXGBE_GORCH); 5089 hwstats->gotc += IXGBE_READ_REG(hw, IXGBE_GOTCH); 5090 hwstats->tor += IXGBE_READ_REG(hw, IXGBE_TORH); 5091 break; 5092 case ixgbe_mac_X540: 5093 /* OS2BMC stats are X540 only*/ 5094 hwstats->o2bgptc += IXGBE_READ_REG(hw, IXGBE_O2BGPTC); 5095 hwstats->o2bspc += IXGBE_READ_REG(hw, IXGBE_O2BSPC); 5096 hwstats->b2ospc += IXGBE_READ_REG(hw, IXGBE_B2OSPC); 5097 hwstats->b2ogprc += IXGBE_READ_REG(hw, IXGBE_B2OGPRC); 5098 case ixgbe_mac_82599EB: 5099 hwstats->gorc += IXGBE_READ_REG(hw, IXGBE_GORCL); 5100 IXGBE_READ_REG(hw, IXGBE_GORCH); /* to clear */ 5101 hwstats->gotc += IXGBE_READ_REG(hw, IXGBE_GOTCL); 5102 IXGBE_READ_REG(hw, IXGBE_GOTCH); /* to clear */ 5103 hwstats->tor += IXGBE_READ_REG(hw, IXGBE_TORL); 5104 IXGBE_READ_REG(hw, IXGBE_TORH); /* to clear */ 5105 hwstats->lxonrxc += IXGBE_READ_REG(hw, IXGBE_LXONRXCNT); 5106 hwstats->fdirmatch += IXGBE_READ_REG(hw, IXGBE_FDIRMATCH); 5107 hwstats->fdirmiss += IXGBE_READ_REG(hw, IXGBE_FDIRMISS); 5108 #ifdef IXGBE_FCOE 5109 hwstats->fccrc += IXGBE_READ_REG(hw, IXGBE_FCCRC); 5110 hwstats->fcoerpdc += IXGBE_READ_REG(hw, IXGBE_FCOERPDC); 5111 hwstats->fcoeprc += IXGBE_READ_REG(hw, IXGBE_FCOEPRC); 5112 hwstats->fcoeptc += IXGBE_READ_REG(hw, IXGBE_FCOEPTC); 5113 hwstats->fcoedwrc += IXGBE_READ_REG(hw, IXGBE_FCOEDWRC); 5114 hwstats->fcoedwtc += IXGBE_READ_REG(hw, IXGBE_FCOEDWTC); 5115 /* Add up per cpu counters for total ddp aloc fail */ 5116 if (fcoe->pcpu_noddp && fcoe->pcpu_noddp_ext_buff) { 5117 for_each_possible_cpu(cpu) { 5118 fcoe_noddp_counts_sum += 5119 *per_cpu_ptr(fcoe->pcpu_noddp, cpu); 5120 fcoe_noddp_ext_buff_counts_sum += 5121 *per_cpu_ptr(fcoe-> 5122 pcpu_noddp_ext_buff, cpu); 5123 } 5124 } 5125 hwstats->fcoe_noddp = fcoe_noddp_counts_sum; 5126 hwstats->fcoe_noddp_ext_buff = fcoe_noddp_ext_buff_counts_sum; 5127 #endif /* IXGBE_FCOE */ 5128 break; 5129 default: 5130 break; 5131 } 5132 bprc = IXGBE_READ_REG(hw, IXGBE_BPRC); 5133 hwstats->bprc += bprc; 5134 hwstats->mprc += IXGBE_READ_REG(hw, IXGBE_MPRC); 5135 if (hw->mac.type == ixgbe_mac_82598EB) 5136 hwstats->mprc -= bprc; 5137 hwstats->roc += IXGBE_READ_REG(hw, IXGBE_ROC); 5138 hwstats->prc64 += IXGBE_READ_REG(hw, IXGBE_PRC64); 5139 hwstats->prc127 += IXGBE_READ_REG(hw, IXGBE_PRC127); 5140 hwstats->prc255 += IXGBE_READ_REG(hw, IXGBE_PRC255); 5141 hwstats->prc511 += IXGBE_READ_REG(hw, IXGBE_PRC511); 5142 hwstats->prc1023 += IXGBE_READ_REG(hw, IXGBE_PRC1023); 5143 hwstats->prc1522 += IXGBE_READ_REG(hw, IXGBE_PRC1522); 5144 hwstats->rlec += IXGBE_READ_REG(hw, IXGBE_RLEC); 5145 lxon = IXGBE_READ_REG(hw, IXGBE_LXONTXC); 5146 hwstats->lxontxc += lxon; 5147 lxoff = IXGBE_READ_REG(hw, IXGBE_LXOFFTXC); 5148 hwstats->lxofftxc += lxoff; 5149 hwstats->gptc += IXGBE_READ_REG(hw, IXGBE_GPTC); 5150 hwstats->mptc += IXGBE_READ_REG(hw, IXGBE_MPTC); 5151 /* 5152 * 82598 errata - tx of flow control packets is included in tx counters 5153 */ 5154 xon_off_tot = lxon + lxoff; 5155 hwstats->gptc -= xon_off_tot; 5156 hwstats->mptc -= xon_off_tot; 5157 hwstats->gotc -= (xon_off_tot * (ETH_ZLEN + ETH_FCS_LEN)); 5158 hwstats->ruc += IXGBE_READ_REG(hw, IXGBE_RUC); 5159 hwstats->rfc += IXGBE_READ_REG(hw, IXGBE_RFC); 5160 hwstats->rjc += IXGBE_READ_REG(hw, IXGBE_RJC); 5161 hwstats->tpr += IXGBE_READ_REG(hw, IXGBE_TPR); 5162 hwstats->ptc64 += IXGBE_READ_REG(hw, IXGBE_PTC64); 5163 hwstats->ptc64 -= xon_off_tot; 5164 hwstats->ptc127 += IXGBE_READ_REG(hw, IXGBE_PTC127); 5165 hwstats->ptc255 += IXGBE_READ_REG(hw, IXGBE_PTC255); 5166 hwstats->ptc511 += IXGBE_READ_REG(hw, IXGBE_PTC511); 5167 hwstats->ptc1023 += IXGBE_READ_REG(hw, IXGBE_PTC1023); 5168 hwstats->ptc1522 += IXGBE_READ_REG(hw, IXGBE_PTC1522); 5169 hwstats->bptc += IXGBE_READ_REG(hw, IXGBE_BPTC); 5170 5171 /* Fill out the OS statistics structure */ 5172 netdev->stats.multicast = hwstats->mprc; 5173 5174 /* Rx Errors */ 5175 netdev->stats.rx_errors = hwstats->crcerrs + hwstats->rlec; 5176 netdev->stats.rx_dropped = 0; 5177 netdev->stats.rx_length_errors = hwstats->rlec; 5178 netdev->stats.rx_crc_errors = hwstats->crcerrs; 5179 netdev->stats.rx_missed_errors = total_mpc; 5180 } 5181 5182 /** 5183 * ixgbe_fdir_reinit_subtask - worker thread to reinit FDIR filter table 5184 * @adapter - pointer to the device adapter structure 5185 **/ 5186 static void ixgbe_fdir_reinit_subtask(struct ixgbe_adapter *adapter) 5187 { 5188 struct ixgbe_hw *hw = &adapter->hw; 5189 int i; 5190 5191 if (!(adapter->flags2 & IXGBE_FLAG2_FDIR_REQUIRES_REINIT)) 5192 return; 5193 5194 adapter->flags2 &= ~IXGBE_FLAG2_FDIR_REQUIRES_REINIT; 5195 5196 /* if interface is down do nothing */ 5197 if (test_bit(__IXGBE_DOWN, &adapter->state)) 5198 return; 5199 5200 /* do nothing if we are not using signature filters */ 5201 if (!(adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE)) 5202 return; 5203 5204 adapter->fdir_overflow++; 5205 5206 if (ixgbe_reinit_fdir_tables_82599(hw) == 0) { 5207 for (i = 0; i < adapter->num_tx_queues; i++) 5208 set_bit(__IXGBE_TX_FDIR_INIT_DONE, 5209 &(adapter->tx_ring[i]->state)); 5210 /* re-enable flow director interrupts */ 5211 IXGBE_WRITE_REG(hw, IXGBE_EIMS, IXGBE_EIMS_FLOW_DIR); 5212 } else { 5213 e_err(probe, "failed to finish FDIR re-initialization, " 5214 "ignored adding FDIR ATR filters\n"); 5215 } 5216 } 5217 5218 /** 5219 * ixgbe_check_hang_subtask - check for hung queues and dropped interrupts 5220 * @adapter - pointer to the device adapter structure 5221 * 5222 * This function serves two purposes. First it strobes the interrupt lines 5223 * in order to make certain interrupts are occurring. Secondly it sets the 5224 * bits needed to check for TX hangs. As a result we should immediately 5225 * determine if a hang has occurred. 5226 */ 5227 static void ixgbe_check_hang_subtask(struct ixgbe_adapter *adapter) 5228 { 5229 struct ixgbe_hw *hw = &adapter->hw; 5230 u64 eics = 0; 5231 int i; 5232 5233 /* If we're down or resetting, just bail */ 5234 if (test_bit(__IXGBE_DOWN, &adapter->state) || 5235 test_bit(__IXGBE_RESETTING, &adapter->state)) 5236 return; 5237 5238 /* Force detection of hung controller */ 5239 if (netif_carrier_ok(adapter->netdev)) { 5240 for (i = 0; i < adapter->num_tx_queues; i++) 5241 set_check_for_tx_hang(adapter->tx_ring[i]); 5242 } 5243 5244 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED)) { 5245 /* 5246 * for legacy and MSI interrupts don't set any bits 5247 * that are enabled for EIAM, because this operation 5248 * would set *both* EIMS and EICS for any bit in EIAM 5249 */ 5250 IXGBE_WRITE_REG(hw, IXGBE_EICS, 5251 (IXGBE_EICS_TCP_TIMER | IXGBE_EICS_OTHER)); 5252 } else { 5253 /* get one bit for every active tx/rx interrupt vector */ 5254 for (i = 0; i < adapter->num_msix_vectors - NON_Q_VECTORS; i++) { 5255 struct ixgbe_q_vector *qv = adapter->q_vector[i]; 5256 if (qv->rx.ring || qv->tx.ring) 5257 eics |= ((u64)1 << i); 5258 } 5259 } 5260 5261 /* Cause software interrupt to ensure rings are cleaned */ 5262 ixgbe_irq_rearm_queues(adapter, eics); 5263 5264 } 5265 5266 /** 5267 * ixgbe_watchdog_update_link - update the link status 5268 * @adapter - pointer to the device adapter structure 5269 * @link_speed - pointer to a u32 to store the link_speed 5270 **/ 5271 static void ixgbe_watchdog_update_link(struct ixgbe_adapter *adapter) 5272 { 5273 struct ixgbe_hw *hw = &adapter->hw; 5274 u32 link_speed = adapter->link_speed; 5275 bool link_up = adapter->link_up; 5276 int i; 5277 5278 if (!(adapter->flags & IXGBE_FLAG_NEED_LINK_UPDATE)) 5279 return; 5280 5281 if (hw->mac.ops.check_link) { 5282 hw->mac.ops.check_link(hw, &link_speed, &link_up, false); 5283 } else { 5284 /* always assume link is up, if no check link function */ 5285 link_speed = IXGBE_LINK_SPEED_10GB_FULL; 5286 link_up = true; 5287 } 5288 if (link_up) { 5289 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) { 5290 for (i = 0; i < MAX_TRAFFIC_CLASS; i++) 5291 hw->mac.ops.fc_enable(hw, i); 5292 } else { 5293 hw->mac.ops.fc_enable(hw, 0); 5294 } 5295 } 5296 5297 if (link_up || 5298 time_after(jiffies, (adapter->link_check_timeout + 5299 IXGBE_TRY_LINK_TIMEOUT))) { 5300 adapter->flags &= ~IXGBE_FLAG_NEED_LINK_UPDATE; 5301 IXGBE_WRITE_REG(hw, IXGBE_EIMS, IXGBE_EIMC_LSC); 5302 IXGBE_WRITE_FLUSH(hw); 5303 } 5304 5305 adapter->link_up = link_up; 5306 adapter->link_speed = link_speed; 5307 } 5308 5309 /** 5310 * ixgbe_watchdog_link_is_up - update netif_carrier status and 5311 * print link up message 5312 * @adapter - pointer to the device adapter structure 5313 **/ 5314 static void ixgbe_watchdog_link_is_up(struct ixgbe_adapter *adapter) 5315 { 5316 struct net_device *netdev = adapter->netdev; 5317 struct ixgbe_hw *hw = &adapter->hw; 5318 u32 link_speed = adapter->link_speed; 5319 bool flow_rx, flow_tx; 5320 5321 /* only continue if link was previously down */ 5322 if (netif_carrier_ok(netdev)) 5323 return; 5324 5325 adapter->flags2 &= ~IXGBE_FLAG2_SEARCH_FOR_SFP; 5326 5327 switch (hw->mac.type) { 5328 case ixgbe_mac_82598EB: { 5329 u32 frctl = IXGBE_READ_REG(hw, IXGBE_FCTRL); 5330 u32 rmcs = IXGBE_READ_REG(hw, IXGBE_RMCS); 5331 flow_rx = !!(frctl & IXGBE_FCTRL_RFCE); 5332 flow_tx = !!(rmcs & IXGBE_RMCS_TFCE_802_3X); 5333 } 5334 break; 5335 case ixgbe_mac_X540: 5336 case ixgbe_mac_82599EB: { 5337 u32 mflcn = IXGBE_READ_REG(hw, IXGBE_MFLCN); 5338 u32 fccfg = IXGBE_READ_REG(hw, IXGBE_FCCFG); 5339 flow_rx = !!(mflcn & IXGBE_MFLCN_RFCE); 5340 flow_tx = !!(fccfg & IXGBE_FCCFG_TFCE_802_3X); 5341 } 5342 break; 5343 default: 5344 flow_tx = false; 5345 flow_rx = false; 5346 break; 5347 } 5348 e_info(drv, "NIC Link is Up %s, Flow Control: %s\n", 5349 (link_speed == IXGBE_LINK_SPEED_10GB_FULL ? 5350 "10 Gbps" : 5351 (link_speed == IXGBE_LINK_SPEED_1GB_FULL ? 5352 "1 Gbps" : 5353 (link_speed == IXGBE_LINK_SPEED_100_FULL ? 5354 "100 Mbps" : 5355 "unknown speed"))), 5356 ((flow_rx && flow_tx) ? "RX/TX" : 5357 (flow_rx ? "RX" : 5358 (flow_tx ? "TX" : "None")))); 5359 5360 netif_carrier_on(netdev); 5361 ixgbe_check_vf_rate_limit(adapter); 5362 } 5363 5364 /** 5365 * ixgbe_watchdog_link_is_down - update netif_carrier status and 5366 * print link down message 5367 * @adapter - pointer to the adapter structure 5368 **/ 5369 static void ixgbe_watchdog_link_is_down(struct ixgbe_adapter *adapter) 5370 { 5371 struct net_device *netdev = adapter->netdev; 5372 struct ixgbe_hw *hw = &adapter->hw; 5373 5374 adapter->link_up = false; 5375 adapter->link_speed = 0; 5376 5377 /* only continue if link was up previously */ 5378 if (!netif_carrier_ok(netdev)) 5379 return; 5380 5381 /* poll for SFP+ cable when link is down */ 5382 if (ixgbe_is_sfp(hw) && hw->mac.type == ixgbe_mac_82598EB) 5383 adapter->flags2 |= IXGBE_FLAG2_SEARCH_FOR_SFP; 5384 5385 e_info(drv, "NIC Link is Down\n"); 5386 netif_carrier_off(netdev); 5387 } 5388 5389 /** 5390 * ixgbe_watchdog_flush_tx - flush queues on link down 5391 * @adapter - pointer to the device adapter structure 5392 **/ 5393 static void ixgbe_watchdog_flush_tx(struct ixgbe_adapter *adapter) 5394 { 5395 int i; 5396 int some_tx_pending = 0; 5397 5398 if (!netif_carrier_ok(adapter->netdev)) { 5399 for (i = 0; i < adapter->num_tx_queues; i++) { 5400 struct ixgbe_ring *tx_ring = adapter->tx_ring[i]; 5401 if (tx_ring->next_to_use != tx_ring->next_to_clean) { 5402 some_tx_pending = 1; 5403 break; 5404 } 5405 } 5406 5407 if (some_tx_pending) { 5408 /* We've lost link, so the controller stops DMA, 5409 * but we've got queued Tx work that's never going 5410 * to get done, so reset controller to flush Tx. 5411 * (Do the reset outside of interrupt context). 5412 */ 5413 adapter->flags2 |= IXGBE_FLAG2_RESET_REQUESTED; 5414 } 5415 } 5416 } 5417 5418 static void ixgbe_spoof_check(struct ixgbe_adapter *adapter) 5419 { 5420 u32 ssvpc; 5421 5422 /* Do not perform spoof check for 82598 */ 5423 if (adapter->hw.mac.type == ixgbe_mac_82598EB) 5424 return; 5425 5426 ssvpc = IXGBE_READ_REG(&adapter->hw, IXGBE_SSVPC); 5427 5428 /* 5429 * ssvpc register is cleared on read, if zero then no 5430 * spoofed packets in the last interval. 5431 */ 5432 if (!ssvpc) 5433 return; 5434 5435 e_warn(drv, "%d Spoofed packets detected\n", ssvpc); 5436 } 5437 5438 /** 5439 * ixgbe_watchdog_subtask - check and bring link up 5440 * @adapter - pointer to the device adapter structure 5441 **/ 5442 static void ixgbe_watchdog_subtask(struct ixgbe_adapter *adapter) 5443 { 5444 /* if interface is down do nothing */ 5445 if (test_bit(__IXGBE_DOWN, &adapter->state) || 5446 test_bit(__IXGBE_RESETTING, &adapter->state)) 5447 return; 5448 5449 ixgbe_watchdog_update_link(adapter); 5450 5451 if (adapter->link_up) 5452 ixgbe_watchdog_link_is_up(adapter); 5453 else 5454 ixgbe_watchdog_link_is_down(adapter); 5455 5456 ixgbe_spoof_check(adapter); 5457 ixgbe_update_stats(adapter); 5458 5459 ixgbe_watchdog_flush_tx(adapter); 5460 } 5461 5462 /** 5463 * ixgbe_sfp_detection_subtask - poll for SFP+ cable 5464 * @adapter - the ixgbe adapter structure 5465 **/ 5466 static void ixgbe_sfp_detection_subtask(struct ixgbe_adapter *adapter) 5467 { 5468 struct ixgbe_hw *hw = &adapter->hw; 5469 s32 err; 5470 5471 /* not searching for SFP so there is nothing to do here */ 5472 if (!(adapter->flags2 & IXGBE_FLAG2_SEARCH_FOR_SFP) && 5473 !(adapter->flags2 & IXGBE_FLAG2_SFP_NEEDS_RESET)) 5474 return; 5475 5476 /* someone else is in init, wait until next service event */ 5477 if (test_and_set_bit(__IXGBE_IN_SFP_INIT, &adapter->state)) 5478 return; 5479 5480 err = hw->phy.ops.identify_sfp(hw); 5481 if (err == IXGBE_ERR_SFP_NOT_SUPPORTED) 5482 goto sfp_out; 5483 5484 if (err == IXGBE_ERR_SFP_NOT_PRESENT) { 5485 /* If no cable is present, then we need to reset 5486 * the next time we find a good cable. */ 5487 adapter->flags2 |= IXGBE_FLAG2_SFP_NEEDS_RESET; 5488 } 5489 5490 /* exit on error */ 5491 if (err) 5492 goto sfp_out; 5493 5494 /* exit if reset not needed */ 5495 if (!(adapter->flags2 & IXGBE_FLAG2_SFP_NEEDS_RESET)) 5496 goto sfp_out; 5497 5498 adapter->flags2 &= ~IXGBE_FLAG2_SFP_NEEDS_RESET; 5499 5500 /* 5501 * A module may be identified correctly, but the EEPROM may not have 5502 * support for that module. setup_sfp() will fail in that case, so 5503 * we should not allow that module to load. 5504 */ 5505 if (hw->mac.type == ixgbe_mac_82598EB) 5506 err = hw->phy.ops.reset(hw); 5507 else 5508 err = hw->mac.ops.setup_sfp(hw); 5509 5510 if (err == IXGBE_ERR_SFP_NOT_SUPPORTED) 5511 goto sfp_out; 5512 5513 adapter->flags |= IXGBE_FLAG_NEED_LINK_CONFIG; 5514 e_info(probe, "detected SFP+: %d\n", hw->phy.sfp_type); 5515 5516 sfp_out: 5517 clear_bit(__IXGBE_IN_SFP_INIT, &adapter->state); 5518 5519 if ((err == IXGBE_ERR_SFP_NOT_SUPPORTED) && 5520 (adapter->netdev->reg_state == NETREG_REGISTERED)) { 5521 e_dev_err("failed to initialize because an unsupported " 5522 "SFP+ module type was detected.\n"); 5523 e_dev_err("Reload the driver after installing a " 5524 "supported module.\n"); 5525 unregister_netdev(adapter->netdev); 5526 } 5527 } 5528 5529 /** 5530 * ixgbe_sfp_link_config_subtask - set up link SFP after module install 5531 * @adapter - the ixgbe adapter structure 5532 **/ 5533 static void ixgbe_sfp_link_config_subtask(struct ixgbe_adapter *adapter) 5534 { 5535 struct ixgbe_hw *hw = &adapter->hw; 5536 u32 autoneg; 5537 bool negotiation; 5538 5539 if (!(adapter->flags & IXGBE_FLAG_NEED_LINK_CONFIG)) 5540 return; 5541 5542 /* someone else is in init, wait until next service event */ 5543 if (test_and_set_bit(__IXGBE_IN_SFP_INIT, &adapter->state)) 5544 return; 5545 5546 adapter->flags &= ~IXGBE_FLAG_NEED_LINK_CONFIG; 5547 5548 autoneg = hw->phy.autoneg_advertised; 5549 if ((!autoneg) && (hw->mac.ops.get_link_capabilities)) 5550 hw->mac.ops.get_link_capabilities(hw, &autoneg, &negotiation); 5551 if (hw->mac.ops.setup_link) 5552 hw->mac.ops.setup_link(hw, autoneg, negotiation, true); 5553 5554 adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE; 5555 adapter->link_check_timeout = jiffies; 5556 clear_bit(__IXGBE_IN_SFP_INIT, &adapter->state); 5557 } 5558 5559 #ifdef CONFIG_PCI_IOV 5560 static void ixgbe_check_for_bad_vf(struct ixgbe_adapter *adapter) 5561 { 5562 int vf; 5563 struct ixgbe_hw *hw = &adapter->hw; 5564 struct net_device *netdev = adapter->netdev; 5565 u32 gpc; 5566 u32 ciaa, ciad; 5567 5568 gpc = IXGBE_READ_REG(hw, IXGBE_TXDGPC); 5569 if (gpc) /* If incrementing then no need for the check below */ 5570 return; 5571 /* 5572 * Check to see if a bad DMA write target from an errant or 5573 * malicious VF has caused a PCIe error. If so then we can 5574 * issue a VFLR to the offending VF(s) and then resume without 5575 * requesting a full slot reset. 5576 */ 5577 5578 for (vf = 0; vf < adapter->num_vfs; vf++) { 5579 ciaa = (vf << 16) | 0x80000000; 5580 /* 32 bit read so align, we really want status at offset 6 */ 5581 ciaa |= PCI_COMMAND; 5582 IXGBE_WRITE_REG(hw, IXGBE_CIAA_82599, ciaa); 5583 ciad = IXGBE_READ_REG(hw, IXGBE_CIAD_82599); 5584 ciaa &= 0x7FFFFFFF; 5585 /* disable debug mode asap after reading data */ 5586 IXGBE_WRITE_REG(hw, IXGBE_CIAA_82599, ciaa); 5587 /* Get the upper 16 bits which will be the PCI status reg */ 5588 ciad >>= 16; 5589 if (ciad & PCI_STATUS_REC_MASTER_ABORT) { 5590 netdev_err(netdev, "VF %d Hung DMA\n", vf); 5591 /* Issue VFLR */ 5592 ciaa = (vf << 16) | 0x80000000; 5593 ciaa |= 0xA8; 5594 IXGBE_WRITE_REG(hw, IXGBE_CIAA_82599, ciaa); 5595 ciad = 0x00008000; /* VFLR */ 5596 IXGBE_WRITE_REG(hw, IXGBE_CIAD_82599, ciad); 5597 ciaa &= 0x7FFFFFFF; 5598 IXGBE_WRITE_REG(hw, IXGBE_CIAA_82599, ciaa); 5599 } 5600 } 5601 } 5602 5603 #endif 5604 /** 5605 * ixgbe_service_timer - Timer Call-back 5606 * @data: pointer to adapter cast into an unsigned long 5607 **/ 5608 static void ixgbe_service_timer(unsigned long data) 5609 { 5610 struct ixgbe_adapter *adapter = (struct ixgbe_adapter *)data; 5611 unsigned long next_event_offset; 5612 bool ready = true; 5613 5614 /* poll faster when waiting for link */ 5615 if (adapter->flags & IXGBE_FLAG_NEED_LINK_UPDATE) 5616 next_event_offset = HZ / 10; 5617 else 5618 next_event_offset = HZ * 2; 5619 5620 #ifdef CONFIG_PCI_IOV 5621 /* 5622 * don't bother with SR-IOV VF DMA hang check if there are 5623 * no VFs or the link is down 5624 */ 5625 if (!adapter->num_vfs || 5626 (adapter->flags & IXGBE_FLAG_NEED_LINK_UPDATE)) 5627 goto normal_timer_service; 5628 5629 /* If we have VFs allocated then we must check for DMA hangs */ 5630 ixgbe_check_for_bad_vf(adapter); 5631 next_event_offset = HZ / 50; 5632 adapter->timer_event_accumulator++; 5633 5634 if (adapter->timer_event_accumulator >= 100) 5635 adapter->timer_event_accumulator = 0; 5636 else 5637 ready = false; 5638 5639 normal_timer_service: 5640 #endif 5641 /* Reset the timer */ 5642 mod_timer(&adapter->service_timer, next_event_offset + jiffies); 5643 5644 if (ready) 5645 ixgbe_service_event_schedule(adapter); 5646 } 5647 5648 static void ixgbe_reset_subtask(struct ixgbe_adapter *adapter) 5649 { 5650 if (!(adapter->flags2 & IXGBE_FLAG2_RESET_REQUESTED)) 5651 return; 5652 5653 adapter->flags2 &= ~IXGBE_FLAG2_RESET_REQUESTED; 5654 5655 /* If we're already down or resetting, just bail */ 5656 if (test_bit(__IXGBE_DOWN, &adapter->state) || 5657 test_bit(__IXGBE_RESETTING, &adapter->state)) 5658 return; 5659 5660 ixgbe_dump(adapter); 5661 netdev_err(adapter->netdev, "Reset adapter\n"); 5662 adapter->tx_timeout_count++; 5663 5664 ixgbe_reinit_locked(adapter); 5665 } 5666 5667 /** 5668 * ixgbe_service_task - manages and runs subtasks 5669 * @work: pointer to work_struct containing our data 5670 **/ 5671 static void ixgbe_service_task(struct work_struct *work) 5672 { 5673 struct ixgbe_adapter *adapter = container_of(work, 5674 struct ixgbe_adapter, 5675 service_task); 5676 5677 ixgbe_reset_subtask(adapter); 5678 ixgbe_sfp_detection_subtask(adapter); 5679 ixgbe_sfp_link_config_subtask(adapter); 5680 ixgbe_check_overtemp_subtask(adapter); 5681 ixgbe_watchdog_subtask(adapter); 5682 ixgbe_fdir_reinit_subtask(adapter); 5683 ixgbe_check_hang_subtask(adapter); 5684 5685 ixgbe_service_event_complete(adapter); 5686 } 5687 5688 static int ixgbe_tso(struct ixgbe_ring *tx_ring, 5689 struct ixgbe_tx_buffer *first, 5690 u8 *hdr_len) 5691 { 5692 struct sk_buff *skb = first->skb; 5693 u32 vlan_macip_lens, type_tucmd; 5694 u32 mss_l4len_idx, l4len; 5695 5696 if (!skb_is_gso(skb)) 5697 return 0; 5698 5699 if (skb_header_cloned(skb)) { 5700 int err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC); 5701 if (err) 5702 return err; 5703 } 5704 5705 /* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */ 5706 type_tucmd = IXGBE_ADVTXD_TUCMD_L4T_TCP; 5707 5708 if (first->protocol == __constant_htons(ETH_P_IP)) { 5709 struct iphdr *iph = ip_hdr(skb); 5710 iph->tot_len = 0; 5711 iph->check = 0; 5712 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr, 5713 iph->daddr, 0, 5714 IPPROTO_TCP, 5715 0); 5716 type_tucmd |= IXGBE_ADVTXD_TUCMD_IPV4; 5717 first->tx_flags |= IXGBE_TX_FLAGS_TSO | 5718 IXGBE_TX_FLAGS_CSUM | 5719 IXGBE_TX_FLAGS_IPV4; 5720 } else if (skb_is_gso_v6(skb)) { 5721 ipv6_hdr(skb)->payload_len = 0; 5722 tcp_hdr(skb)->check = 5723 ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr, 5724 &ipv6_hdr(skb)->daddr, 5725 0, IPPROTO_TCP, 0); 5726 first->tx_flags |= IXGBE_TX_FLAGS_TSO | 5727 IXGBE_TX_FLAGS_CSUM; 5728 } 5729 5730 /* compute header lengths */ 5731 l4len = tcp_hdrlen(skb); 5732 *hdr_len = skb_transport_offset(skb) + l4len; 5733 5734 /* update gso size and bytecount with header size */ 5735 first->gso_segs = skb_shinfo(skb)->gso_segs; 5736 first->bytecount += (first->gso_segs - 1) * *hdr_len; 5737 5738 /* mss_l4len_id: use 1 as index for TSO */ 5739 mss_l4len_idx = l4len << IXGBE_ADVTXD_L4LEN_SHIFT; 5740 mss_l4len_idx |= skb_shinfo(skb)->gso_size << IXGBE_ADVTXD_MSS_SHIFT; 5741 mss_l4len_idx |= 1 << IXGBE_ADVTXD_IDX_SHIFT; 5742 5743 /* vlan_macip_lens: HEADLEN, MACLEN, VLAN tag */ 5744 vlan_macip_lens = skb_network_header_len(skb); 5745 vlan_macip_lens |= skb_network_offset(skb) << IXGBE_ADVTXD_MACLEN_SHIFT; 5746 vlan_macip_lens |= first->tx_flags & IXGBE_TX_FLAGS_VLAN_MASK; 5747 5748 ixgbe_tx_ctxtdesc(tx_ring, vlan_macip_lens, 0, type_tucmd, 5749 mss_l4len_idx); 5750 5751 return 1; 5752 } 5753 5754 static void ixgbe_tx_csum(struct ixgbe_ring *tx_ring, 5755 struct ixgbe_tx_buffer *first) 5756 { 5757 struct sk_buff *skb = first->skb; 5758 u32 vlan_macip_lens = 0; 5759 u32 mss_l4len_idx = 0; 5760 u32 type_tucmd = 0; 5761 5762 if (skb->ip_summed != CHECKSUM_PARTIAL) { 5763 if (!(first->tx_flags & IXGBE_TX_FLAGS_HW_VLAN) && 5764 !(first->tx_flags & IXGBE_TX_FLAGS_TXSW)) 5765 return; 5766 } else { 5767 u8 l4_hdr = 0; 5768 switch (first->protocol) { 5769 case __constant_htons(ETH_P_IP): 5770 vlan_macip_lens |= skb_network_header_len(skb); 5771 type_tucmd |= IXGBE_ADVTXD_TUCMD_IPV4; 5772 l4_hdr = ip_hdr(skb)->protocol; 5773 break; 5774 case __constant_htons(ETH_P_IPV6): 5775 vlan_macip_lens |= skb_network_header_len(skb); 5776 l4_hdr = ipv6_hdr(skb)->nexthdr; 5777 break; 5778 default: 5779 if (unlikely(net_ratelimit())) { 5780 dev_warn(tx_ring->dev, 5781 "partial checksum but proto=%x!\n", 5782 first->protocol); 5783 } 5784 break; 5785 } 5786 5787 switch (l4_hdr) { 5788 case IPPROTO_TCP: 5789 type_tucmd |= IXGBE_ADVTXD_TUCMD_L4T_TCP; 5790 mss_l4len_idx = tcp_hdrlen(skb) << 5791 IXGBE_ADVTXD_L4LEN_SHIFT; 5792 break; 5793 case IPPROTO_SCTP: 5794 type_tucmd |= IXGBE_ADVTXD_TUCMD_L4T_SCTP; 5795 mss_l4len_idx = sizeof(struct sctphdr) << 5796 IXGBE_ADVTXD_L4LEN_SHIFT; 5797 break; 5798 case IPPROTO_UDP: 5799 mss_l4len_idx = sizeof(struct udphdr) << 5800 IXGBE_ADVTXD_L4LEN_SHIFT; 5801 break; 5802 default: 5803 if (unlikely(net_ratelimit())) { 5804 dev_warn(tx_ring->dev, 5805 "partial checksum but l4 proto=%x!\n", 5806 l4_hdr); 5807 } 5808 break; 5809 } 5810 5811 /* update TX checksum flag */ 5812 first->tx_flags |= IXGBE_TX_FLAGS_CSUM; 5813 } 5814 5815 /* vlan_macip_lens: MACLEN, VLAN tag */ 5816 vlan_macip_lens |= skb_network_offset(skb) << IXGBE_ADVTXD_MACLEN_SHIFT; 5817 vlan_macip_lens |= first->tx_flags & IXGBE_TX_FLAGS_VLAN_MASK; 5818 5819 ixgbe_tx_ctxtdesc(tx_ring, vlan_macip_lens, 0, 5820 type_tucmd, mss_l4len_idx); 5821 } 5822 5823 static __le32 ixgbe_tx_cmd_type(u32 tx_flags) 5824 { 5825 /* set type for advanced descriptor with frame checksum insertion */ 5826 __le32 cmd_type = cpu_to_le32(IXGBE_ADVTXD_DTYP_DATA | 5827 IXGBE_ADVTXD_DCMD_IFCS | 5828 IXGBE_ADVTXD_DCMD_DEXT); 5829 5830 /* set HW vlan bit if vlan is present */ 5831 if (tx_flags & IXGBE_TX_FLAGS_HW_VLAN) 5832 cmd_type |= cpu_to_le32(IXGBE_ADVTXD_DCMD_VLE); 5833 5834 /* set segmentation enable bits for TSO/FSO */ 5835 #ifdef IXGBE_FCOE 5836 if (tx_flags & (IXGBE_TX_FLAGS_TSO | IXGBE_TX_FLAGS_FSO)) 5837 #else 5838 if (tx_flags & IXGBE_TX_FLAGS_TSO) 5839 #endif 5840 cmd_type |= cpu_to_le32(IXGBE_ADVTXD_DCMD_TSE); 5841 5842 return cmd_type; 5843 } 5844 5845 static void ixgbe_tx_olinfo_status(union ixgbe_adv_tx_desc *tx_desc, 5846 u32 tx_flags, unsigned int paylen) 5847 { 5848 __le32 olinfo_status = cpu_to_le32(paylen << IXGBE_ADVTXD_PAYLEN_SHIFT); 5849 5850 /* enable L4 checksum for TSO and TX checksum offload */ 5851 if (tx_flags & IXGBE_TX_FLAGS_CSUM) 5852 olinfo_status |= cpu_to_le32(IXGBE_ADVTXD_POPTS_TXSM); 5853 5854 /* enble IPv4 checksum for TSO */ 5855 if (tx_flags & IXGBE_TX_FLAGS_IPV4) 5856 olinfo_status |= cpu_to_le32(IXGBE_ADVTXD_POPTS_IXSM); 5857 5858 /* use index 1 context for TSO/FSO/FCOE */ 5859 #ifdef IXGBE_FCOE 5860 if (tx_flags & (IXGBE_TX_FLAGS_TSO | IXGBE_TX_FLAGS_FCOE)) 5861 #else 5862 if (tx_flags & IXGBE_TX_FLAGS_TSO) 5863 #endif 5864 olinfo_status |= cpu_to_le32(1 << IXGBE_ADVTXD_IDX_SHIFT); 5865 5866 /* 5867 * Check Context must be set if Tx switch is enabled, which it 5868 * always is for case where virtual functions are running 5869 */ 5870 #ifdef IXGBE_FCOE 5871 if (tx_flags & (IXGBE_TX_FLAGS_TXSW | IXGBE_TX_FLAGS_FCOE)) 5872 #else 5873 if (tx_flags & IXGBE_TX_FLAGS_TXSW) 5874 #endif 5875 olinfo_status |= cpu_to_le32(IXGBE_ADVTXD_CC); 5876 5877 tx_desc->read.olinfo_status = olinfo_status; 5878 } 5879 5880 #define IXGBE_TXD_CMD (IXGBE_TXD_CMD_EOP | \ 5881 IXGBE_TXD_CMD_RS) 5882 5883 static void ixgbe_tx_map(struct ixgbe_ring *tx_ring, 5884 struct ixgbe_tx_buffer *first, 5885 const u8 hdr_len) 5886 { 5887 dma_addr_t dma; 5888 struct sk_buff *skb = first->skb; 5889 struct ixgbe_tx_buffer *tx_buffer; 5890 union ixgbe_adv_tx_desc *tx_desc; 5891 struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[0]; 5892 unsigned int data_len = skb->data_len; 5893 unsigned int size = skb_headlen(skb); 5894 unsigned int paylen = skb->len - hdr_len; 5895 u32 tx_flags = first->tx_flags; 5896 __le32 cmd_type; 5897 u16 i = tx_ring->next_to_use; 5898 5899 tx_desc = IXGBE_TX_DESC(tx_ring, i); 5900 5901 ixgbe_tx_olinfo_status(tx_desc, tx_flags, paylen); 5902 cmd_type = ixgbe_tx_cmd_type(tx_flags); 5903 5904 #ifdef IXGBE_FCOE 5905 if (tx_flags & IXGBE_TX_FLAGS_FCOE) { 5906 if (data_len < sizeof(struct fcoe_crc_eof)) { 5907 size -= sizeof(struct fcoe_crc_eof) - data_len; 5908 data_len = 0; 5909 } else { 5910 data_len -= sizeof(struct fcoe_crc_eof); 5911 } 5912 } 5913 5914 #endif 5915 dma = dma_map_single(tx_ring->dev, skb->data, size, DMA_TO_DEVICE); 5916 if (dma_mapping_error(tx_ring->dev, dma)) 5917 goto dma_error; 5918 5919 /* record length, and DMA address */ 5920 dma_unmap_len_set(first, len, size); 5921 dma_unmap_addr_set(first, dma, dma); 5922 5923 tx_desc->read.buffer_addr = cpu_to_le64(dma); 5924 5925 for (;;) { 5926 while (unlikely(size > IXGBE_MAX_DATA_PER_TXD)) { 5927 tx_desc->read.cmd_type_len = 5928 cmd_type | cpu_to_le32(IXGBE_MAX_DATA_PER_TXD); 5929 5930 i++; 5931 tx_desc++; 5932 if (i == tx_ring->count) { 5933 tx_desc = IXGBE_TX_DESC(tx_ring, 0); 5934 i = 0; 5935 } 5936 5937 dma += IXGBE_MAX_DATA_PER_TXD; 5938 size -= IXGBE_MAX_DATA_PER_TXD; 5939 5940 tx_desc->read.buffer_addr = cpu_to_le64(dma); 5941 tx_desc->read.olinfo_status = 0; 5942 } 5943 5944 if (likely(!data_len)) 5945 break; 5946 5947 if (unlikely(skb->no_fcs)) 5948 cmd_type &= ~(cpu_to_le32(IXGBE_ADVTXD_DCMD_IFCS)); 5949 tx_desc->read.cmd_type_len = cmd_type | cpu_to_le32(size); 5950 5951 i++; 5952 tx_desc++; 5953 if (i == tx_ring->count) { 5954 tx_desc = IXGBE_TX_DESC(tx_ring, 0); 5955 i = 0; 5956 } 5957 5958 #ifdef IXGBE_FCOE 5959 size = min_t(unsigned int, data_len, skb_frag_size(frag)); 5960 #else 5961 size = skb_frag_size(frag); 5962 #endif 5963 data_len -= size; 5964 5965 dma = skb_frag_dma_map(tx_ring->dev, frag, 0, size, 5966 DMA_TO_DEVICE); 5967 if (dma_mapping_error(tx_ring->dev, dma)) 5968 goto dma_error; 5969 5970 tx_buffer = &tx_ring->tx_buffer_info[i]; 5971 dma_unmap_len_set(tx_buffer, len, size); 5972 dma_unmap_addr_set(tx_buffer, dma, dma); 5973 5974 tx_desc->read.buffer_addr = cpu_to_le64(dma); 5975 tx_desc->read.olinfo_status = 0; 5976 5977 frag++; 5978 } 5979 5980 /* write last descriptor with RS and EOP bits */ 5981 cmd_type |= cpu_to_le32(size) | cpu_to_le32(IXGBE_TXD_CMD); 5982 tx_desc->read.cmd_type_len = cmd_type; 5983 5984 netdev_tx_sent_queue(txring_txq(tx_ring), first->bytecount); 5985 5986 /* set the timestamp */ 5987 first->time_stamp = jiffies; 5988 5989 /* 5990 * Force memory writes to complete before letting h/w know there 5991 * are new descriptors to fetch. (Only applicable for weak-ordered 5992 * memory model archs, such as IA-64). 5993 * 5994 * We also need this memory barrier to make certain all of the 5995 * status bits have been updated before next_to_watch is written. 5996 */ 5997 wmb(); 5998 5999 /* set next_to_watch value indicating a packet is present */ 6000 first->next_to_watch = tx_desc; 6001 6002 i++; 6003 if (i == tx_ring->count) 6004 i = 0; 6005 6006 tx_ring->next_to_use = i; 6007 6008 /* notify HW of packet */ 6009 writel(i, tx_ring->tail); 6010 6011 return; 6012 dma_error: 6013 dev_err(tx_ring->dev, "TX DMA map failed\n"); 6014 6015 /* clear dma mappings for failed tx_buffer_info map */ 6016 for (;;) { 6017 tx_buffer = &tx_ring->tx_buffer_info[i]; 6018 ixgbe_unmap_and_free_tx_resource(tx_ring, tx_buffer); 6019 if (tx_buffer == first) 6020 break; 6021 if (i == 0) 6022 i = tx_ring->count; 6023 i--; 6024 } 6025 6026 tx_ring->next_to_use = i; 6027 } 6028 6029 static void ixgbe_atr(struct ixgbe_ring *ring, 6030 struct ixgbe_tx_buffer *first) 6031 { 6032 struct ixgbe_q_vector *q_vector = ring->q_vector; 6033 union ixgbe_atr_hash_dword input = { .dword = 0 }; 6034 union ixgbe_atr_hash_dword common = { .dword = 0 }; 6035 union { 6036 unsigned char *network; 6037 struct iphdr *ipv4; 6038 struct ipv6hdr *ipv6; 6039 } hdr; 6040 struct tcphdr *th; 6041 __be16 vlan_id; 6042 6043 /* if ring doesn't have a interrupt vector, cannot perform ATR */ 6044 if (!q_vector) 6045 return; 6046 6047 /* do nothing if sampling is disabled */ 6048 if (!ring->atr_sample_rate) 6049 return; 6050 6051 ring->atr_count++; 6052 6053 /* snag network header to get L4 type and address */ 6054 hdr.network = skb_network_header(first->skb); 6055 6056 /* Currently only IPv4/IPv6 with TCP is supported */ 6057 if ((first->protocol != __constant_htons(ETH_P_IPV6) || 6058 hdr.ipv6->nexthdr != IPPROTO_TCP) && 6059 (first->protocol != __constant_htons(ETH_P_IP) || 6060 hdr.ipv4->protocol != IPPROTO_TCP)) 6061 return; 6062 6063 th = tcp_hdr(first->skb); 6064 6065 /* skip this packet since it is invalid or the socket is closing */ 6066 if (!th || th->fin) 6067 return; 6068 6069 /* sample on all syn packets or once every atr sample count */ 6070 if (!th->syn && (ring->atr_count < ring->atr_sample_rate)) 6071 return; 6072 6073 /* reset sample count */ 6074 ring->atr_count = 0; 6075 6076 vlan_id = htons(first->tx_flags >> IXGBE_TX_FLAGS_VLAN_SHIFT); 6077 6078 /* 6079 * src and dst are inverted, think how the receiver sees them 6080 * 6081 * The input is broken into two sections, a non-compressed section 6082 * containing vm_pool, vlan_id, and flow_type. The rest of the data 6083 * is XORed together and stored in the compressed dword. 6084 */ 6085 input.formatted.vlan_id = vlan_id; 6086 6087 /* 6088 * since src port and flex bytes occupy the same word XOR them together 6089 * and write the value to source port portion of compressed dword 6090 */ 6091 if (first->tx_flags & (IXGBE_TX_FLAGS_SW_VLAN | IXGBE_TX_FLAGS_HW_VLAN)) 6092 common.port.src ^= th->dest ^ __constant_htons(ETH_P_8021Q); 6093 else 6094 common.port.src ^= th->dest ^ first->protocol; 6095 common.port.dst ^= th->source; 6096 6097 if (first->protocol == __constant_htons(ETH_P_IP)) { 6098 input.formatted.flow_type = IXGBE_ATR_FLOW_TYPE_TCPV4; 6099 common.ip ^= hdr.ipv4->saddr ^ hdr.ipv4->daddr; 6100 } else { 6101 input.formatted.flow_type = IXGBE_ATR_FLOW_TYPE_TCPV6; 6102 common.ip ^= hdr.ipv6->saddr.s6_addr32[0] ^ 6103 hdr.ipv6->saddr.s6_addr32[1] ^ 6104 hdr.ipv6->saddr.s6_addr32[2] ^ 6105 hdr.ipv6->saddr.s6_addr32[3] ^ 6106 hdr.ipv6->daddr.s6_addr32[0] ^ 6107 hdr.ipv6->daddr.s6_addr32[1] ^ 6108 hdr.ipv6->daddr.s6_addr32[2] ^ 6109 hdr.ipv6->daddr.s6_addr32[3]; 6110 } 6111 6112 /* This assumes the Rx queue and Tx queue are bound to the same CPU */ 6113 ixgbe_fdir_add_signature_filter_82599(&q_vector->adapter->hw, 6114 input, common, ring->queue_index); 6115 } 6116 6117 static int __ixgbe_maybe_stop_tx(struct ixgbe_ring *tx_ring, u16 size) 6118 { 6119 netif_stop_subqueue(tx_ring->netdev, tx_ring->queue_index); 6120 /* Herbert's original patch had: 6121 * smp_mb__after_netif_stop_queue(); 6122 * but since that doesn't exist yet, just open code it. */ 6123 smp_mb(); 6124 6125 /* We need to check again in a case another CPU has just 6126 * made room available. */ 6127 if (likely(ixgbe_desc_unused(tx_ring) < size)) 6128 return -EBUSY; 6129 6130 /* A reprieve! - use start_queue because it doesn't call schedule */ 6131 netif_start_subqueue(tx_ring->netdev, tx_ring->queue_index); 6132 ++tx_ring->tx_stats.restart_queue; 6133 return 0; 6134 } 6135 6136 static inline int ixgbe_maybe_stop_tx(struct ixgbe_ring *tx_ring, u16 size) 6137 { 6138 if (likely(ixgbe_desc_unused(tx_ring) >= size)) 6139 return 0; 6140 return __ixgbe_maybe_stop_tx(tx_ring, size); 6141 } 6142 6143 static u16 ixgbe_select_queue(struct net_device *dev, struct sk_buff *skb) 6144 { 6145 struct ixgbe_adapter *adapter = netdev_priv(dev); 6146 int txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 6147 smp_processor_id(); 6148 #ifdef IXGBE_FCOE 6149 __be16 protocol = vlan_get_protocol(skb); 6150 6151 if (((protocol == htons(ETH_P_FCOE)) || 6152 (protocol == htons(ETH_P_FIP))) && 6153 (adapter->flags & IXGBE_FLAG_FCOE_ENABLED)) { 6154 txq &= (adapter->ring_feature[RING_F_FCOE].indices - 1); 6155 txq += adapter->ring_feature[RING_F_FCOE].mask; 6156 return txq; 6157 } 6158 #endif 6159 6160 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) { 6161 while (unlikely(txq >= dev->real_num_tx_queues)) 6162 txq -= dev->real_num_tx_queues; 6163 return txq; 6164 } 6165 6166 return skb_tx_hash(dev, skb); 6167 } 6168 6169 netdev_tx_t ixgbe_xmit_frame_ring(struct sk_buff *skb, 6170 struct ixgbe_adapter *adapter, 6171 struct ixgbe_ring *tx_ring) 6172 { 6173 struct ixgbe_tx_buffer *first; 6174 int tso; 6175 u32 tx_flags = 0; 6176 #if PAGE_SIZE > IXGBE_MAX_DATA_PER_TXD 6177 unsigned short f; 6178 #endif 6179 u16 count = TXD_USE_COUNT(skb_headlen(skb)); 6180 __be16 protocol = skb->protocol; 6181 u8 hdr_len = 0; 6182 6183 /* 6184 * need: 1 descriptor per page * PAGE_SIZE/IXGBE_MAX_DATA_PER_TXD, 6185 * + 1 desc for skb_headlen/IXGBE_MAX_DATA_PER_TXD, 6186 * + 2 desc gap to keep tail from touching head, 6187 * + 1 desc for context descriptor, 6188 * otherwise try next time 6189 */ 6190 #if PAGE_SIZE > IXGBE_MAX_DATA_PER_TXD 6191 for (f = 0; f < skb_shinfo(skb)->nr_frags; f++) 6192 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size); 6193 #else 6194 count += skb_shinfo(skb)->nr_frags; 6195 #endif 6196 if (ixgbe_maybe_stop_tx(tx_ring, count + 3)) { 6197 tx_ring->tx_stats.tx_busy++; 6198 return NETDEV_TX_BUSY; 6199 } 6200 6201 /* record the location of the first descriptor for this packet */ 6202 first = &tx_ring->tx_buffer_info[tx_ring->next_to_use]; 6203 first->skb = skb; 6204 first->bytecount = skb->len; 6205 first->gso_segs = 1; 6206 6207 /* if we have a HW VLAN tag being added default to the HW one */ 6208 if (vlan_tx_tag_present(skb)) { 6209 tx_flags |= vlan_tx_tag_get(skb) << IXGBE_TX_FLAGS_VLAN_SHIFT; 6210 tx_flags |= IXGBE_TX_FLAGS_HW_VLAN; 6211 /* else if it is a SW VLAN check the next protocol and store the tag */ 6212 } else if (protocol == __constant_htons(ETH_P_8021Q)) { 6213 struct vlan_hdr *vhdr, _vhdr; 6214 vhdr = skb_header_pointer(skb, ETH_HLEN, sizeof(_vhdr), &_vhdr); 6215 if (!vhdr) 6216 goto out_drop; 6217 6218 protocol = vhdr->h_vlan_encapsulated_proto; 6219 tx_flags |= ntohs(vhdr->h_vlan_TCI) << 6220 IXGBE_TX_FLAGS_VLAN_SHIFT; 6221 tx_flags |= IXGBE_TX_FLAGS_SW_VLAN; 6222 } 6223 6224 #ifdef CONFIG_PCI_IOV 6225 /* 6226 * Use the l2switch_enable flag - would be false if the DMA 6227 * Tx switch had been disabled. 6228 */ 6229 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) 6230 tx_flags |= IXGBE_TX_FLAGS_TXSW; 6231 6232 #endif 6233 /* DCB maps skb priorities 0-7 onto 3 bit PCP of VLAN tag. */ 6234 if ((adapter->flags & IXGBE_FLAG_DCB_ENABLED) && 6235 ((tx_flags & (IXGBE_TX_FLAGS_HW_VLAN | IXGBE_TX_FLAGS_SW_VLAN)) || 6236 (skb->priority != TC_PRIO_CONTROL))) { 6237 tx_flags &= ~IXGBE_TX_FLAGS_VLAN_PRIO_MASK; 6238 tx_flags |= (skb->priority & 0x7) << 6239 IXGBE_TX_FLAGS_VLAN_PRIO_SHIFT; 6240 if (tx_flags & IXGBE_TX_FLAGS_SW_VLAN) { 6241 struct vlan_ethhdr *vhdr; 6242 if (skb_header_cloned(skb) && 6243 pskb_expand_head(skb, 0, 0, GFP_ATOMIC)) 6244 goto out_drop; 6245 vhdr = (struct vlan_ethhdr *)skb->data; 6246 vhdr->h_vlan_TCI = htons(tx_flags >> 6247 IXGBE_TX_FLAGS_VLAN_SHIFT); 6248 } else { 6249 tx_flags |= IXGBE_TX_FLAGS_HW_VLAN; 6250 } 6251 } 6252 6253 /* record initial flags and protocol */ 6254 first->tx_flags = tx_flags; 6255 first->protocol = protocol; 6256 6257 #ifdef IXGBE_FCOE 6258 /* setup tx offload for FCoE */ 6259 if ((protocol == __constant_htons(ETH_P_FCOE)) && 6260 (adapter->flags & IXGBE_FLAG_FCOE_ENABLED)) { 6261 tso = ixgbe_fso(tx_ring, first, &hdr_len); 6262 if (tso < 0) 6263 goto out_drop; 6264 6265 goto xmit_fcoe; 6266 } 6267 6268 #endif /* IXGBE_FCOE */ 6269 tso = ixgbe_tso(tx_ring, first, &hdr_len); 6270 if (tso < 0) 6271 goto out_drop; 6272 else if (!tso) 6273 ixgbe_tx_csum(tx_ring, first); 6274 6275 /* add the ATR filter if ATR is on */ 6276 if (test_bit(__IXGBE_TX_FDIR_INIT_DONE, &tx_ring->state)) 6277 ixgbe_atr(tx_ring, first); 6278 6279 #ifdef IXGBE_FCOE 6280 xmit_fcoe: 6281 #endif /* IXGBE_FCOE */ 6282 ixgbe_tx_map(tx_ring, first, hdr_len); 6283 6284 ixgbe_maybe_stop_tx(tx_ring, DESC_NEEDED); 6285 6286 return NETDEV_TX_OK; 6287 6288 out_drop: 6289 dev_kfree_skb_any(first->skb); 6290 first->skb = NULL; 6291 6292 return NETDEV_TX_OK; 6293 } 6294 6295 static netdev_tx_t ixgbe_xmit_frame(struct sk_buff *skb, 6296 struct net_device *netdev) 6297 { 6298 struct ixgbe_adapter *adapter = netdev_priv(netdev); 6299 struct ixgbe_ring *tx_ring; 6300 6301 if (skb->len <= 0) { 6302 dev_kfree_skb_any(skb); 6303 return NETDEV_TX_OK; 6304 } 6305 6306 /* 6307 * The minimum packet size for olinfo paylen is 17 so pad the skb 6308 * in order to meet this minimum size requirement. 6309 */ 6310 if (skb->len < 17) { 6311 if (skb_padto(skb, 17)) 6312 return NETDEV_TX_OK; 6313 skb->len = 17; 6314 } 6315 6316 tx_ring = adapter->tx_ring[skb->queue_mapping]; 6317 return ixgbe_xmit_frame_ring(skb, adapter, tx_ring); 6318 } 6319 6320 /** 6321 * ixgbe_set_mac - Change the Ethernet Address of the NIC 6322 * @netdev: network interface device structure 6323 * @p: pointer to an address structure 6324 * 6325 * Returns 0 on success, negative on failure 6326 **/ 6327 static int ixgbe_set_mac(struct net_device *netdev, void *p) 6328 { 6329 struct ixgbe_adapter *adapter = netdev_priv(netdev); 6330 struct ixgbe_hw *hw = &adapter->hw; 6331 struct sockaddr *addr = p; 6332 6333 if (!is_valid_ether_addr(addr->sa_data)) 6334 return -EADDRNOTAVAIL; 6335 6336 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len); 6337 memcpy(hw->mac.addr, addr->sa_data, netdev->addr_len); 6338 6339 hw->mac.ops.set_rar(hw, 0, hw->mac.addr, adapter->num_vfs, 6340 IXGBE_RAH_AV); 6341 6342 return 0; 6343 } 6344 6345 static int 6346 ixgbe_mdio_read(struct net_device *netdev, int prtad, int devad, u16 addr) 6347 { 6348 struct ixgbe_adapter *adapter = netdev_priv(netdev); 6349 struct ixgbe_hw *hw = &adapter->hw; 6350 u16 value; 6351 int rc; 6352 6353 if (prtad != hw->phy.mdio.prtad) 6354 return -EINVAL; 6355 rc = hw->phy.ops.read_reg(hw, addr, devad, &value); 6356 if (!rc) 6357 rc = value; 6358 return rc; 6359 } 6360 6361 static int ixgbe_mdio_write(struct net_device *netdev, int prtad, int devad, 6362 u16 addr, u16 value) 6363 { 6364 struct ixgbe_adapter *adapter = netdev_priv(netdev); 6365 struct ixgbe_hw *hw = &adapter->hw; 6366 6367 if (prtad != hw->phy.mdio.prtad) 6368 return -EINVAL; 6369 return hw->phy.ops.write_reg(hw, addr, devad, value); 6370 } 6371 6372 static int ixgbe_ioctl(struct net_device *netdev, struct ifreq *req, int cmd) 6373 { 6374 struct ixgbe_adapter *adapter = netdev_priv(netdev); 6375 6376 return mdio_mii_ioctl(&adapter->hw.phy.mdio, if_mii(req), cmd); 6377 } 6378 6379 /** 6380 * ixgbe_add_sanmac_netdev - Add the SAN MAC address to the corresponding 6381 * netdev->dev_addrs 6382 * @netdev: network interface device structure 6383 * 6384 * Returns non-zero on failure 6385 **/ 6386 static int ixgbe_add_sanmac_netdev(struct net_device *dev) 6387 { 6388 int err = 0; 6389 struct ixgbe_adapter *adapter = netdev_priv(dev); 6390 struct ixgbe_mac_info *mac = &adapter->hw.mac; 6391 6392 if (is_valid_ether_addr(mac->san_addr)) { 6393 rtnl_lock(); 6394 err = dev_addr_add(dev, mac->san_addr, NETDEV_HW_ADDR_T_SAN); 6395 rtnl_unlock(); 6396 } 6397 return err; 6398 } 6399 6400 /** 6401 * ixgbe_del_sanmac_netdev - Removes the SAN MAC address to the corresponding 6402 * netdev->dev_addrs 6403 * @netdev: network interface device structure 6404 * 6405 * Returns non-zero on failure 6406 **/ 6407 static int ixgbe_del_sanmac_netdev(struct net_device *dev) 6408 { 6409 int err = 0; 6410 struct ixgbe_adapter *adapter = netdev_priv(dev); 6411 struct ixgbe_mac_info *mac = &adapter->hw.mac; 6412 6413 if (is_valid_ether_addr(mac->san_addr)) { 6414 rtnl_lock(); 6415 err = dev_addr_del(dev, mac->san_addr, NETDEV_HW_ADDR_T_SAN); 6416 rtnl_unlock(); 6417 } 6418 return err; 6419 } 6420 6421 #ifdef CONFIG_NET_POLL_CONTROLLER 6422 /* 6423 * Polling 'interrupt' - used by things like netconsole to send skbs 6424 * without having to re-enable interrupts. It's not called while 6425 * the interrupt routine is executing. 6426 */ 6427 static void ixgbe_netpoll(struct net_device *netdev) 6428 { 6429 struct ixgbe_adapter *adapter = netdev_priv(netdev); 6430 int i; 6431 6432 /* if interface is down do nothing */ 6433 if (test_bit(__IXGBE_DOWN, &adapter->state)) 6434 return; 6435 6436 adapter->flags |= IXGBE_FLAG_IN_NETPOLL; 6437 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) { 6438 int num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS; 6439 for (i = 0; i < num_q_vectors; i++) { 6440 struct ixgbe_q_vector *q_vector = adapter->q_vector[i]; 6441 ixgbe_msix_clean_rings(0, q_vector); 6442 } 6443 } else { 6444 ixgbe_intr(adapter->pdev->irq, netdev); 6445 } 6446 adapter->flags &= ~IXGBE_FLAG_IN_NETPOLL; 6447 } 6448 6449 #endif 6450 static struct rtnl_link_stats64 *ixgbe_get_stats64(struct net_device *netdev, 6451 struct rtnl_link_stats64 *stats) 6452 { 6453 struct ixgbe_adapter *adapter = netdev_priv(netdev); 6454 int i; 6455 6456 rcu_read_lock(); 6457 for (i = 0; i < adapter->num_rx_queues; i++) { 6458 struct ixgbe_ring *ring = ACCESS_ONCE(adapter->rx_ring[i]); 6459 u64 bytes, packets; 6460 unsigned int start; 6461 6462 if (ring) { 6463 do { 6464 start = u64_stats_fetch_begin_bh(&ring->syncp); 6465 packets = ring->stats.packets; 6466 bytes = ring->stats.bytes; 6467 } while (u64_stats_fetch_retry_bh(&ring->syncp, start)); 6468 stats->rx_packets += packets; 6469 stats->rx_bytes += bytes; 6470 } 6471 } 6472 6473 for (i = 0; i < adapter->num_tx_queues; i++) { 6474 struct ixgbe_ring *ring = ACCESS_ONCE(adapter->tx_ring[i]); 6475 u64 bytes, packets; 6476 unsigned int start; 6477 6478 if (ring) { 6479 do { 6480 start = u64_stats_fetch_begin_bh(&ring->syncp); 6481 packets = ring->stats.packets; 6482 bytes = ring->stats.bytes; 6483 } while (u64_stats_fetch_retry_bh(&ring->syncp, start)); 6484 stats->tx_packets += packets; 6485 stats->tx_bytes += bytes; 6486 } 6487 } 6488 rcu_read_unlock(); 6489 /* following stats updated by ixgbe_watchdog_task() */ 6490 stats->multicast = netdev->stats.multicast; 6491 stats->rx_errors = netdev->stats.rx_errors; 6492 stats->rx_length_errors = netdev->stats.rx_length_errors; 6493 stats->rx_crc_errors = netdev->stats.rx_crc_errors; 6494 stats->rx_missed_errors = netdev->stats.rx_missed_errors; 6495 return stats; 6496 } 6497 6498 #ifdef CONFIG_IXGBE_DCB 6499 /* ixgbe_validate_rtr - verify 802.1Qp to Rx packet buffer mapping is valid. 6500 * #adapter: pointer to ixgbe_adapter 6501 * @tc: number of traffic classes currently enabled 6502 * 6503 * Configure a valid 802.1Qp to Rx packet buffer mapping ie confirm 6504 * 802.1Q priority maps to a packet buffer that exists. 6505 */ 6506 static void ixgbe_validate_rtr(struct ixgbe_adapter *adapter, u8 tc) 6507 { 6508 struct ixgbe_hw *hw = &adapter->hw; 6509 u32 reg, rsave; 6510 int i; 6511 6512 /* 82598 have a static priority to TC mapping that can not 6513 * be changed so no validation is needed. 6514 */ 6515 if (hw->mac.type == ixgbe_mac_82598EB) 6516 return; 6517 6518 reg = IXGBE_READ_REG(hw, IXGBE_RTRUP2TC); 6519 rsave = reg; 6520 6521 for (i = 0; i < MAX_TRAFFIC_CLASS; i++) { 6522 u8 up2tc = reg >> (i * IXGBE_RTRUP2TC_UP_SHIFT); 6523 6524 /* If up2tc is out of bounds default to zero */ 6525 if (up2tc > tc) 6526 reg &= ~(0x7 << IXGBE_RTRUP2TC_UP_SHIFT); 6527 } 6528 6529 if (reg != rsave) 6530 IXGBE_WRITE_REG(hw, IXGBE_RTRUP2TC, reg); 6531 6532 return; 6533 } 6534 6535 /* ixgbe_setup_tc - routine to configure net_device for multiple traffic 6536 * classes. 6537 * 6538 * @netdev: net device to configure 6539 * @tc: number of traffic classes to enable 6540 */ 6541 int ixgbe_setup_tc(struct net_device *dev, u8 tc) 6542 { 6543 struct ixgbe_adapter *adapter = netdev_priv(dev); 6544 struct ixgbe_hw *hw = &adapter->hw; 6545 6546 /* Multiple traffic classes requires multiple queues */ 6547 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED)) { 6548 e_err(drv, "Enable failed, needs MSI-X\n"); 6549 return -EINVAL; 6550 } 6551 6552 /* Hardware supports up to 8 traffic classes */ 6553 if (tc > adapter->dcb_cfg.num_tcs.pg_tcs || 6554 (hw->mac.type == ixgbe_mac_82598EB && 6555 tc < MAX_TRAFFIC_CLASS)) 6556 return -EINVAL; 6557 6558 /* Hardware has to reinitialize queues and interrupts to 6559 * match packet buffer alignment. Unfortunately, the 6560 * hardware is not flexible enough to do this dynamically. 6561 */ 6562 if (netif_running(dev)) 6563 ixgbe_close(dev); 6564 ixgbe_clear_interrupt_scheme(adapter); 6565 6566 if (tc) { 6567 netdev_set_num_tc(dev, tc); 6568 adapter->last_lfc_mode = adapter->hw.fc.current_mode; 6569 adapter->flags |= IXGBE_FLAG_DCB_ENABLED; 6570 adapter->flags &= ~IXGBE_FLAG_FDIR_HASH_CAPABLE; 6571 6572 if (adapter->hw.mac.type == ixgbe_mac_82598EB) 6573 adapter->hw.fc.requested_mode = ixgbe_fc_none; 6574 } else { 6575 netdev_reset_tc(dev); 6576 adapter->hw.fc.requested_mode = adapter->last_lfc_mode; 6577 6578 adapter->flags &= ~IXGBE_FLAG_DCB_ENABLED; 6579 adapter->flags |= IXGBE_FLAG_FDIR_HASH_CAPABLE; 6580 6581 adapter->temp_dcb_cfg.pfc_mode_enable = false; 6582 adapter->dcb_cfg.pfc_mode_enable = false; 6583 } 6584 6585 ixgbe_init_interrupt_scheme(adapter); 6586 ixgbe_validate_rtr(adapter, tc); 6587 if (netif_running(dev)) 6588 ixgbe_open(dev); 6589 6590 return 0; 6591 } 6592 6593 #endif /* CONFIG_IXGBE_DCB */ 6594 void ixgbe_do_reset(struct net_device *netdev) 6595 { 6596 struct ixgbe_adapter *adapter = netdev_priv(netdev); 6597 6598 if (netif_running(netdev)) 6599 ixgbe_reinit_locked(adapter); 6600 else 6601 ixgbe_reset(adapter); 6602 } 6603 6604 static netdev_features_t ixgbe_fix_features(struct net_device *netdev, 6605 netdev_features_t features) 6606 { 6607 struct ixgbe_adapter *adapter = netdev_priv(netdev); 6608 6609 #ifdef CONFIG_DCB 6610 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) 6611 features &= ~NETIF_F_HW_VLAN_RX; 6612 #endif 6613 6614 /* return error if RXHASH is being enabled when RSS is not supported */ 6615 if (!(adapter->flags & IXGBE_FLAG_RSS_ENABLED)) 6616 features &= ~NETIF_F_RXHASH; 6617 6618 /* If Rx checksum is disabled, then RSC/LRO should also be disabled */ 6619 if (!(features & NETIF_F_RXCSUM)) 6620 features &= ~NETIF_F_LRO; 6621 6622 /* Turn off LRO if not RSC capable */ 6623 if (!(adapter->flags2 & IXGBE_FLAG2_RSC_CAPABLE)) 6624 features &= ~NETIF_F_LRO; 6625 6626 6627 return features; 6628 } 6629 6630 static int ixgbe_set_features(struct net_device *netdev, 6631 netdev_features_t features) 6632 { 6633 struct ixgbe_adapter *adapter = netdev_priv(netdev); 6634 netdev_features_t changed = netdev->features ^ features; 6635 bool need_reset = false; 6636 6637 /* Make sure RSC matches LRO, reset if change */ 6638 if (!(features & NETIF_F_LRO)) { 6639 if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED) 6640 need_reset = true; 6641 adapter->flags2 &= ~IXGBE_FLAG2_RSC_ENABLED; 6642 } else if ((adapter->flags2 & IXGBE_FLAG2_RSC_CAPABLE) && 6643 !(adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED)) { 6644 if (adapter->rx_itr_setting == 1 || 6645 adapter->rx_itr_setting > IXGBE_MIN_RSC_ITR) { 6646 adapter->flags2 |= IXGBE_FLAG2_RSC_ENABLED; 6647 need_reset = true; 6648 } else if ((changed ^ features) & NETIF_F_LRO) { 6649 e_info(probe, "rx-usecs set too low, " 6650 "disabling RSC\n"); 6651 } 6652 } 6653 6654 /* 6655 * Check if Flow Director n-tuple support was enabled or disabled. If 6656 * the state changed, we need to reset. 6657 */ 6658 if (!(features & NETIF_F_NTUPLE)) { 6659 if (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE) { 6660 /* turn off Flow Director, set ATR and reset */ 6661 if ((adapter->flags & IXGBE_FLAG_RSS_ENABLED) && 6662 !(adapter->flags & IXGBE_FLAG_DCB_ENABLED)) 6663 adapter->flags |= IXGBE_FLAG_FDIR_HASH_CAPABLE; 6664 need_reset = true; 6665 } 6666 adapter->flags &= ~IXGBE_FLAG_FDIR_PERFECT_CAPABLE; 6667 } else if (!(adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)) { 6668 /* turn off ATR, enable perfect filters and reset */ 6669 adapter->flags &= ~IXGBE_FLAG_FDIR_HASH_CAPABLE; 6670 adapter->flags |= IXGBE_FLAG_FDIR_PERFECT_CAPABLE; 6671 need_reset = true; 6672 } 6673 6674 if (changed & NETIF_F_RXALL) 6675 need_reset = true; 6676 6677 netdev->features = features; 6678 if (need_reset) 6679 ixgbe_do_reset(netdev); 6680 6681 return 0; 6682 } 6683 6684 static const struct net_device_ops ixgbe_netdev_ops = { 6685 .ndo_open = ixgbe_open, 6686 .ndo_stop = ixgbe_close, 6687 .ndo_start_xmit = ixgbe_xmit_frame, 6688 .ndo_select_queue = ixgbe_select_queue, 6689 .ndo_set_rx_mode = ixgbe_set_rx_mode, 6690 .ndo_validate_addr = eth_validate_addr, 6691 .ndo_set_mac_address = ixgbe_set_mac, 6692 .ndo_change_mtu = ixgbe_change_mtu, 6693 .ndo_tx_timeout = ixgbe_tx_timeout, 6694 .ndo_vlan_rx_add_vid = ixgbe_vlan_rx_add_vid, 6695 .ndo_vlan_rx_kill_vid = ixgbe_vlan_rx_kill_vid, 6696 .ndo_do_ioctl = ixgbe_ioctl, 6697 .ndo_set_vf_mac = ixgbe_ndo_set_vf_mac, 6698 .ndo_set_vf_vlan = ixgbe_ndo_set_vf_vlan, 6699 .ndo_set_vf_tx_rate = ixgbe_ndo_set_vf_bw, 6700 .ndo_set_vf_spoofchk = ixgbe_ndo_set_vf_spoofchk, 6701 .ndo_get_vf_config = ixgbe_ndo_get_vf_config, 6702 .ndo_get_stats64 = ixgbe_get_stats64, 6703 #ifdef CONFIG_IXGBE_DCB 6704 .ndo_setup_tc = ixgbe_setup_tc, 6705 #endif 6706 #ifdef CONFIG_NET_POLL_CONTROLLER 6707 .ndo_poll_controller = ixgbe_netpoll, 6708 #endif 6709 #ifdef IXGBE_FCOE 6710 .ndo_fcoe_ddp_setup = ixgbe_fcoe_ddp_get, 6711 .ndo_fcoe_ddp_target = ixgbe_fcoe_ddp_target, 6712 .ndo_fcoe_ddp_done = ixgbe_fcoe_ddp_put, 6713 .ndo_fcoe_enable = ixgbe_fcoe_enable, 6714 .ndo_fcoe_disable = ixgbe_fcoe_disable, 6715 .ndo_fcoe_get_wwn = ixgbe_fcoe_get_wwn, 6716 .ndo_fcoe_get_hbainfo = ixgbe_fcoe_get_hbainfo, 6717 #endif /* IXGBE_FCOE */ 6718 .ndo_set_features = ixgbe_set_features, 6719 .ndo_fix_features = ixgbe_fix_features, 6720 }; 6721 6722 static void __devinit ixgbe_probe_vf(struct ixgbe_adapter *adapter, 6723 const struct ixgbe_info *ii) 6724 { 6725 #ifdef CONFIG_PCI_IOV 6726 struct ixgbe_hw *hw = &adapter->hw; 6727 6728 if (hw->mac.type == ixgbe_mac_82598EB) 6729 return; 6730 6731 /* The 82599 supports up to 64 VFs per physical function 6732 * but this implementation limits allocation to 63 so that 6733 * basic networking resources are still available to the 6734 * physical function 6735 */ 6736 adapter->num_vfs = (max_vfs > 63) ? 63 : max_vfs; 6737 ixgbe_enable_sriov(adapter, ii); 6738 #endif /* CONFIG_PCI_IOV */ 6739 } 6740 6741 /** 6742 * ixgbe_probe - Device Initialization Routine 6743 * @pdev: PCI device information struct 6744 * @ent: entry in ixgbe_pci_tbl 6745 * 6746 * Returns 0 on success, negative on failure 6747 * 6748 * ixgbe_probe initializes an adapter identified by a pci_dev structure. 6749 * The OS initialization, configuring of the adapter private structure, 6750 * and a hardware reset occur. 6751 **/ 6752 static int __devinit ixgbe_probe(struct pci_dev *pdev, 6753 const struct pci_device_id *ent) 6754 { 6755 struct net_device *netdev; 6756 struct ixgbe_adapter *adapter = NULL; 6757 struct ixgbe_hw *hw; 6758 const struct ixgbe_info *ii = ixgbe_info_tbl[ent->driver_data]; 6759 static int cards_found; 6760 int i, err, pci_using_dac; 6761 u8 part_str[IXGBE_PBANUM_LENGTH]; 6762 unsigned int indices = num_possible_cpus(); 6763 #ifdef IXGBE_FCOE 6764 u16 device_caps; 6765 #endif 6766 u32 eec; 6767 u16 wol_cap; 6768 6769 /* Catch broken hardware that put the wrong VF device ID in 6770 * the PCIe SR-IOV capability. 6771 */ 6772 if (pdev->is_virtfn) { 6773 WARN(1, KERN_ERR "%s (%hx:%hx) should not be a VF!\n", 6774 pci_name(pdev), pdev->vendor, pdev->device); 6775 return -EINVAL; 6776 } 6777 6778 err = pci_enable_device_mem(pdev); 6779 if (err) 6780 return err; 6781 6782 if (!dma_set_mask(&pdev->dev, DMA_BIT_MASK(64)) && 6783 !dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64))) { 6784 pci_using_dac = 1; 6785 } else { 6786 err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32)); 6787 if (err) { 6788 err = dma_set_coherent_mask(&pdev->dev, 6789 DMA_BIT_MASK(32)); 6790 if (err) { 6791 dev_err(&pdev->dev, 6792 "No usable DMA configuration, aborting\n"); 6793 goto err_dma; 6794 } 6795 } 6796 pci_using_dac = 0; 6797 } 6798 6799 err = pci_request_selected_regions(pdev, pci_select_bars(pdev, 6800 IORESOURCE_MEM), ixgbe_driver_name); 6801 if (err) { 6802 dev_err(&pdev->dev, 6803 "pci_request_selected_regions failed 0x%x\n", err); 6804 goto err_pci_reg; 6805 } 6806 6807 pci_enable_pcie_error_reporting(pdev); 6808 6809 pci_set_master(pdev); 6810 pci_save_state(pdev); 6811 6812 #ifdef CONFIG_IXGBE_DCB 6813 indices *= MAX_TRAFFIC_CLASS; 6814 #endif 6815 6816 if (ii->mac == ixgbe_mac_82598EB) 6817 indices = min_t(unsigned int, indices, IXGBE_MAX_RSS_INDICES); 6818 else 6819 indices = min_t(unsigned int, indices, IXGBE_MAX_FDIR_INDICES); 6820 6821 #ifdef IXGBE_FCOE 6822 indices += min_t(unsigned int, num_possible_cpus(), 6823 IXGBE_MAX_FCOE_INDICES); 6824 #endif 6825 netdev = alloc_etherdev_mq(sizeof(struct ixgbe_adapter), indices); 6826 if (!netdev) { 6827 err = -ENOMEM; 6828 goto err_alloc_etherdev; 6829 } 6830 6831 SET_NETDEV_DEV(netdev, &pdev->dev); 6832 6833 adapter = netdev_priv(netdev); 6834 pci_set_drvdata(pdev, adapter); 6835 6836 adapter->netdev = netdev; 6837 adapter->pdev = pdev; 6838 hw = &adapter->hw; 6839 hw->back = adapter; 6840 adapter->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE); 6841 6842 hw->hw_addr = ioremap(pci_resource_start(pdev, 0), 6843 pci_resource_len(pdev, 0)); 6844 if (!hw->hw_addr) { 6845 err = -EIO; 6846 goto err_ioremap; 6847 } 6848 6849 for (i = 1; i <= 5; i++) { 6850 if (pci_resource_len(pdev, i) == 0) 6851 continue; 6852 } 6853 6854 netdev->netdev_ops = &ixgbe_netdev_ops; 6855 ixgbe_set_ethtool_ops(netdev); 6856 netdev->watchdog_timeo = 5 * HZ; 6857 strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1); 6858 6859 adapter->bd_number = cards_found; 6860 6861 /* Setup hw api */ 6862 memcpy(&hw->mac.ops, ii->mac_ops, sizeof(hw->mac.ops)); 6863 hw->mac.type = ii->mac; 6864 6865 /* EEPROM */ 6866 memcpy(&hw->eeprom.ops, ii->eeprom_ops, sizeof(hw->eeprom.ops)); 6867 eec = IXGBE_READ_REG(hw, IXGBE_EEC); 6868 /* If EEPROM is valid (bit 8 = 1), use default otherwise use bit bang */ 6869 if (!(eec & (1 << 8))) 6870 hw->eeprom.ops.read = &ixgbe_read_eeprom_bit_bang_generic; 6871 6872 /* PHY */ 6873 memcpy(&hw->phy.ops, ii->phy_ops, sizeof(hw->phy.ops)); 6874 hw->phy.sfp_type = ixgbe_sfp_type_unknown; 6875 /* ixgbe_identify_phy_generic will set prtad and mmds properly */ 6876 hw->phy.mdio.prtad = MDIO_PRTAD_NONE; 6877 hw->phy.mdio.mmds = 0; 6878 hw->phy.mdio.mode_support = MDIO_SUPPORTS_C45 | MDIO_EMULATE_C22; 6879 hw->phy.mdio.dev = netdev; 6880 hw->phy.mdio.mdio_read = ixgbe_mdio_read; 6881 hw->phy.mdio.mdio_write = ixgbe_mdio_write; 6882 6883 ii->get_invariants(hw); 6884 6885 /* setup the private structure */ 6886 err = ixgbe_sw_init(adapter); 6887 if (err) 6888 goto err_sw_init; 6889 6890 /* Make it possible the adapter to be woken up via WOL */ 6891 switch (adapter->hw.mac.type) { 6892 case ixgbe_mac_82599EB: 6893 case ixgbe_mac_X540: 6894 IXGBE_WRITE_REG(&adapter->hw, IXGBE_WUS, ~0); 6895 break; 6896 default: 6897 break; 6898 } 6899 6900 /* 6901 * If there is a fan on this device and it has failed log the 6902 * failure. 6903 */ 6904 if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) { 6905 u32 esdp = IXGBE_READ_REG(hw, IXGBE_ESDP); 6906 if (esdp & IXGBE_ESDP_SDP1) 6907 e_crit(probe, "Fan has stopped, replace the adapter\n"); 6908 } 6909 6910 if (allow_unsupported_sfp) 6911 hw->allow_unsupported_sfp = allow_unsupported_sfp; 6912 6913 /* reset_hw fills in the perm_addr as well */ 6914 hw->phy.reset_if_overtemp = true; 6915 err = hw->mac.ops.reset_hw(hw); 6916 hw->phy.reset_if_overtemp = false; 6917 if (err == IXGBE_ERR_SFP_NOT_PRESENT && 6918 hw->mac.type == ixgbe_mac_82598EB) { 6919 err = 0; 6920 } else if (err == IXGBE_ERR_SFP_NOT_SUPPORTED) { 6921 e_dev_err("failed to load because an unsupported SFP+ " 6922 "module type was detected.\n"); 6923 e_dev_err("Reload the driver after installing a supported " 6924 "module.\n"); 6925 goto err_sw_init; 6926 } else if (err) { 6927 e_dev_err("HW Init failed: %d\n", err); 6928 goto err_sw_init; 6929 } 6930 6931 ixgbe_probe_vf(adapter, ii); 6932 6933 netdev->features = NETIF_F_SG | 6934 NETIF_F_IP_CSUM | 6935 NETIF_F_IPV6_CSUM | 6936 NETIF_F_HW_VLAN_TX | 6937 NETIF_F_HW_VLAN_RX | 6938 NETIF_F_HW_VLAN_FILTER | 6939 NETIF_F_TSO | 6940 NETIF_F_TSO6 | 6941 NETIF_F_RXHASH | 6942 NETIF_F_RXCSUM; 6943 6944 netdev->hw_features = netdev->features; 6945 6946 switch (adapter->hw.mac.type) { 6947 case ixgbe_mac_82599EB: 6948 case ixgbe_mac_X540: 6949 netdev->features |= NETIF_F_SCTP_CSUM; 6950 netdev->hw_features |= NETIF_F_SCTP_CSUM | 6951 NETIF_F_NTUPLE; 6952 break; 6953 default: 6954 break; 6955 } 6956 6957 netdev->hw_features |= NETIF_F_RXALL; 6958 6959 netdev->vlan_features |= NETIF_F_TSO; 6960 netdev->vlan_features |= NETIF_F_TSO6; 6961 netdev->vlan_features |= NETIF_F_IP_CSUM; 6962 netdev->vlan_features |= NETIF_F_IPV6_CSUM; 6963 netdev->vlan_features |= NETIF_F_SG; 6964 6965 netdev->priv_flags |= IFF_UNICAST_FLT; 6966 netdev->priv_flags |= IFF_SUPP_NOFCS; 6967 6968 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) 6969 adapter->flags &= ~(IXGBE_FLAG_RSS_ENABLED | 6970 IXGBE_FLAG_DCB_ENABLED); 6971 6972 #ifdef CONFIG_IXGBE_DCB 6973 netdev->dcbnl_ops = &dcbnl_ops; 6974 #endif 6975 6976 #ifdef IXGBE_FCOE 6977 if (adapter->flags & IXGBE_FLAG_FCOE_CAPABLE) { 6978 if (hw->mac.ops.get_device_caps) { 6979 hw->mac.ops.get_device_caps(hw, &device_caps); 6980 if (device_caps & IXGBE_DEVICE_CAPS_FCOE_OFFLOADS) 6981 adapter->flags &= ~IXGBE_FLAG_FCOE_CAPABLE; 6982 } 6983 } 6984 if (adapter->flags & IXGBE_FLAG_FCOE_CAPABLE) { 6985 netdev->vlan_features |= NETIF_F_FCOE_CRC; 6986 netdev->vlan_features |= NETIF_F_FSO; 6987 netdev->vlan_features |= NETIF_F_FCOE_MTU; 6988 } 6989 #endif /* IXGBE_FCOE */ 6990 if (pci_using_dac) { 6991 netdev->features |= NETIF_F_HIGHDMA; 6992 netdev->vlan_features |= NETIF_F_HIGHDMA; 6993 } 6994 6995 if (adapter->flags2 & IXGBE_FLAG2_RSC_CAPABLE) 6996 netdev->hw_features |= NETIF_F_LRO; 6997 if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED) 6998 netdev->features |= NETIF_F_LRO; 6999 7000 /* make sure the EEPROM is good */ 7001 if (hw->eeprom.ops.validate_checksum(hw, NULL) < 0) { 7002 e_dev_err("The EEPROM Checksum Is Not Valid\n"); 7003 err = -EIO; 7004 goto err_sw_init; 7005 } 7006 7007 memcpy(netdev->dev_addr, hw->mac.perm_addr, netdev->addr_len); 7008 memcpy(netdev->perm_addr, hw->mac.perm_addr, netdev->addr_len); 7009 7010 if (ixgbe_validate_mac_addr(netdev->perm_addr)) { 7011 e_dev_err("invalid MAC address\n"); 7012 err = -EIO; 7013 goto err_sw_init; 7014 } 7015 7016 setup_timer(&adapter->service_timer, &ixgbe_service_timer, 7017 (unsigned long) adapter); 7018 7019 INIT_WORK(&adapter->service_task, ixgbe_service_task); 7020 clear_bit(__IXGBE_SERVICE_SCHED, &adapter->state); 7021 7022 err = ixgbe_init_interrupt_scheme(adapter); 7023 if (err) 7024 goto err_sw_init; 7025 7026 if (!(adapter->flags & IXGBE_FLAG_RSS_ENABLED)) { 7027 netdev->hw_features &= ~NETIF_F_RXHASH; 7028 netdev->features &= ~NETIF_F_RXHASH; 7029 } 7030 7031 /* WOL not supported for all but the following */ 7032 adapter->wol = 0; 7033 switch (pdev->device) { 7034 case IXGBE_DEV_ID_82599_SFP: 7035 /* Only these subdevice supports WOL */ 7036 switch (pdev->subsystem_device) { 7037 case IXGBE_SUBDEV_ID_82599_560FLR: 7038 /* only support first port */ 7039 if (hw->bus.func != 0) 7040 break; 7041 case IXGBE_SUBDEV_ID_82599_SFP: 7042 adapter->wol = IXGBE_WUFC_MAG; 7043 break; 7044 } 7045 break; 7046 case IXGBE_DEV_ID_82599_COMBO_BACKPLANE: 7047 /* All except this subdevice support WOL */ 7048 if (pdev->subsystem_device != IXGBE_SUBDEV_ID_82599_KX4_KR_MEZZ) 7049 adapter->wol = IXGBE_WUFC_MAG; 7050 break; 7051 case IXGBE_DEV_ID_82599_KX4: 7052 adapter->wol = IXGBE_WUFC_MAG; 7053 break; 7054 case IXGBE_DEV_ID_X540T: 7055 /* Check eeprom to see if it is enabled */ 7056 hw->eeprom.ops.read(hw, 0x2c, &adapter->eeprom_cap); 7057 wol_cap = adapter->eeprom_cap & IXGBE_DEVICE_CAPS_WOL_MASK; 7058 7059 if ((wol_cap == IXGBE_DEVICE_CAPS_WOL_PORT0_1) || 7060 ((wol_cap == IXGBE_DEVICE_CAPS_WOL_PORT0) && 7061 (hw->bus.func == 0))) 7062 adapter->wol = IXGBE_WUFC_MAG; 7063 break; 7064 } 7065 device_set_wakeup_enable(&adapter->pdev->dev, adapter->wol); 7066 7067 /* save off EEPROM version number */ 7068 hw->eeprom.ops.read(hw, 0x2e, &adapter->eeprom_verh); 7069 hw->eeprom.ops.read(hw, 0x2d, &adapter->eeprom_verl); 7070 7071 /* pick up the PCI bus settings for reporting later */ 7072 hw->mac.ops.get_bus_info(hw); 7073 7074 /* print bus type/speed/width info */ 7075 e_dev_info("(PCI Express:%s:%s) %pM\n", 7076 (hw->bus.speed == ixgbe_bus_speed_5000 ? "5.0GT/s" : 7077 hw->bus.speed == ixgbe_bus_speed_2500 ? "2.5GT/s" : 7078 "Unknown"), 7079 (hw->bus.width == ixgbe_bus_width_pcie_x8 ? "Width x8" : 7080 hw->bus.width == ixgbe_bus_width_pcie_x4 ? "Width x4" : 7081 hw->bus.width == ixgbe_bus_width_pcie_x1 ? "Width x1" : 7082 "Unknown"), 7083 netdev->dev_addr); 7084 7085 err = ixgbe_read_pba_string_generic(hw, part_str, IXGBE_PBANUM_LENGTH); 7086 if (err) 7087 strncpy(part_str, "Unknown", IXGBE_PBANUM_LENGTH); 7088 if (ixgbe_is_sfp(hw) && hw->phy.sfp_type != ixgbe_sfp_type_not_present) 7089 e_dev_info("MAC: %d, PHY: %d, SFP+: %d, PBA No: %s\n", 7090 hw->mac.type, hw->phy.type, hw->phy.sfp_type, 7091 part_str); 7092 else 7093 e_dev_info("MAC: %d, PHY: %d, PBA No: %s\n", 7094 hw->mac.type, hw->phy.type, part_str); 7095 7096 if (hw->bus.width <= ixgbe_bus_width_pcie_x4) { 7097 e_dev_warn("PCI-Express bandwidth available for this card is " 7098 "not sufficient for optimal performance.\n"); 7099 e_dev_warn("For optimal performance a x8 PCI-Express slot " 7100 "is required.\n"); 7101 } 7102 7103 /* reset the hardware with the new settings */ 7104 err = hw->mac.ops.start_hw(hw); 7105 if (err == IXGBE_ERR_EEPROM_VERSION) { 7106 /* We are running on a pre-production device, log a warning */ 7107 e_dev_warn("This device is a pre-production adapter/LOM. " 7108 "Please be aware there may be issues associated " 7109 "with your hardware. If you are experiencing " 7110 "problems please contact your Intel or hardware " 7111 "representative who provided you with this " 7112 "hardware.\n"); 7113 } 7114 strcpy(netdev->name, "eth%d"); 7115 err = register_netdev(netdev); 7116 if (err) 7117 goto err_register; 7118 7119 /* power down the optics for multispeed fiber and 82599 SFP+ fiber */ 7120 if (hw->mac.ops.disable_tx_laser && 7121 ((hw->phy.multispeed_fiber) || 7122 ((hw->mac.ops.get_media_type(hw) == ixgbe_media_type_fiber) && 7123 (hw->mac.type == ixgbe_mac_82599EB)))) 7124 hw->mac.ops.disable_tx_laser(hw); 7125 7126 /* carrier off reporting is important to ethtool even BEFORE open */ 7127 netif_carrier_off(netdev); 7128 7129 #ifdef CONFIG_IXGBE_DCA 7130 if (dca_add_requester(&pdev->dev) == 0) { 7131 adapter->flags |= IXGBE_FLAG_DCA_ENABLED; 7132 ixgbe_setup_dca(adapter); 7133 } 7134 #endif 7135 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) { 7136 e_info(probe, "IOV is enabled with %d VFs\n", adapter->num_vfs); 7137 for (i = 0; i < adapter->num_vfs; i++) 7138 ixgbe_vf_configuration(pdev, (i | 0x10000000)); 7139 } 7140 7141 /* firmware requires driver version to be 0xFFFFFFFF 7142 * since os does not support feature 7143 */ 7144 if (hw->mac.ops.set_fw_drv_ver) 7145 hw->mac.ops.set_fw_drv_ver(hw, 0xFF, 0xFF, 0xFF, 7146 0xFF); 7147 7148 /* add san mac addr to netdev */ 7149 ixgbe_add_sanmac_netdev(netdev); 7150 7151 e_dev_info("%s\n", ixgbe_default_device_descr); 7152 cards_found++; 7153 return 0; 7154 7155 err_register: 7156 ixgbe_release_hw_control(adapter); 7157 ixgbe_clear_interrupt_scheme(adapter); 7158 err_sw_init: 7159 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) 7160 ixgbe_disable_sriov(adapter); 7161 adapter->flags2 &= ~IXGBE_FLAG2_SEARCH_FOR_SFP; 7162 iounmap(hw->hw_addr); 7163 err_ioremap: 7164 free_netdev(netdev); 7165 err_alloc_etherdev: 7166 pci_release_selected_regions(pdev, 7167 pci_select_bars(pdev, IORESOURCE_MEM)); 7168 err_pci_reg: 7169 err_dma: 7170 pci_disable_device(pdev); 7171 return err; 7172 } 7173 7174 /** 7175 * ixgbe_remove - Device Removal Routine 7176 * @pdev: PCI device information struct 7177 * 7178 * ixgbe_remove is called by the PCI subsystem to alert the driver 7179 * that it should release a PCI device. The could be caused by a 7180 * Hot-Plug event, or because the driver is going to be removed from 7181 * memory. 7182 **/ 7183 static void __devexit ixgbe_remove(struct pci_dev *pdev) 7184 { 7185 struct ixgbe_adapter *adapter = pci_get_drvdata(pdev); 7186 struct net_device *netdev = adapter->netdev; 7187 7188 set_bit(__IXGBE_DOWN, &adapter->state); 7189 cancel_work_sync(&adapter->service_task); 7190 7191 #ifdef CONFIG_IXGBE_DCA 7192 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) { 7193 adapter->flags &= ~IXGBE_FLAG_DCA_ENABLED; 7194 dca_remove_requester(&pdev->dev); 7195 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL, 1); 7196 } 7197 7198 #endif 7199 #ifdef IXGBE_FCOE 7200 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED) 7201 ixgbe_cleanup_fcoe(adapter); 7202 7203 #endif /* IXGBE_FCOE */ 7204 7205 /* remove the added san mac */ 7206 ixgbe_del_sanmac_netdev(netdev); 7207 7208 if (netdev->reg_state == NETREG_REGISTERED) 7209 unregister_netdev(netdev); 7210 7211 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) { 7212 if (!(ixgbe_check_vf_assignment(adapter))) 7213 ixgbe_disable_sriov(adapter); 7214 else 7215 e_dev_warn("Unloading driver while VFs are assigned " 7216 "- VFs will not be deallocated\n"); 7217 } 7218 7219 ixgbe_clear_interrupt_scheme(adapter); 7220 7221 ixgbe_release_hw_control(adapter); 7222 7223 iounmap(adapter->hw.hw_addr); 7224 pci_release_selected_regions(pdev, pci_select_bars(pdev, 7225 IORESOURCE_MEM)); 7226 7227 e_dev_info("complete\n"); 7228 7229 free_netdev(netdev); 7230 7231 pci_disable_pcie_error_reporting(pdev); 7232 7233 pci_disable_device(pdev); 7234 } 7235 7236 /** 7237 * ixgbe_io_error_detected - called when PCI error is detected 7238 * @pdev: Pointer to PCI device 7239 * @state: The current pci connection state 7240 * 7241 * This function is called after a PCI bus error affecting 7242 * this device has been detected. 7243 */ 7244 static pci_ers_result_t ixgbe_io_error_detected(struct pci_dev *pdev, 7245 pci_channel_state_t state) 7246 { 7247 struct ixgbe_adapter *adapter = pci_get_drvdata(pdev); 7248 struct net_device *netdev = adapter->netdev; 7249 7250 #ifdef CONFIG_PCI_IOV 7251 struct pci_dev *bdev, *vfdev; 7252 u32 dw0, dw1, dw2, dw3; 7253 int vf, pos; 7254 u16 req_id, pf_func; 7255 7256 if (adapter->hw.mac.type == ixgbe_mac_82598EB || 7257 adapter->num_vfs == 0) 7258 goto skip_bad_vf_detection; 7259 7260 bdev = pdev->bus->self; 7261 while (bdev && (bdev->pcie_type != PCI_EXP_TYPE_ROOT_PORT)) 7262 bdev = bdev->bus->self; 7263 7264 if (!bdev) 7265 goto skip_bad_vf_detection; 7266 7267 pos = pci_find_ext_capability(bdev, PCI_EXT_CAP_ID_ERR); 7268 if (!pos) 7269 goto skip_bad_vf_detection; 7270 7271 pci_read_config_dword(bdev, pos + PCI_ERR_HEADER_LOG, &dw0); 7272 pci_read_config_dword(bdev, pos + PCI_ERR_HEADER_LOG + 4, &dw1); 7273 pci_read_config_dword(bdev, pos + PCI_ERR_HEADER_LOG + 8, &dw2); 7274 pci_read_config_dword(bdev, pos + PCI_ERR_HEADER_LOG + 12, &dw3); 7275 7276 req_id = dw1 >> 16; 7277 /* On the 82599 if bit 7 of the requestor ID is set then it's a VF */ 7278 if (!(req_id & 0x0080)) 7279 goto skip_bad_vf_detection; 7280 7281 pf_func = req_id & 0x01; 7282 if ((pf_func & 1) == (pdev->devfn & 1)) { 7283 unsigned int device_id; 7284 7285 vf = (req_id & 0x7F) >> 1; 7286 e_dev_err("VF %d has caused a PCIe error\n", vf); 7287 e_dev_err("TLP: dw0: %8.8x\tdw1: %8.8x\tdw2: " 7288 "%8.8x\tdw3: %8.8x\n", 7289 dw0, dw1, dw2, dw3); 7290 switch (adapter->hw.mac.type) { 7291 case ixgbe_mac_82599EB: 7292 device_id = IXGBE_82599_VF_DEVICE_ID; 7293 break; 7294 case ixgbe_mac_X540: 7295 device_id = IXGBE_X540_VF_DEVICE_ID; 7296 break; 7297 default: 7298 device_id = 0; 7299 break; 7300 } 7301 7302 /* Find the pci device of the offending VF */ 7303 vfdev = pci_get_device(IXGBE_INTEL_VENDOR_ID, device_id, NULL); 7304 while (vfdev) { 7305 if (vfdev->devfn == (req_id & 0xFF)) 7306 break; 7307 vfdev = pci_get_device(IXGBE_INTEL_VENDOR_ID, 7308 device_id, vfdev); 7309 } 7310 /* 7311 * There's a slim chance the VF could have been hot plugged, 7312 * so if it is no longer present we don't need to issue the 7313 * VFLR. Just clean up the AER in that case. 7314 */ 7315 if (vfdev) { 7316 e_dev_err("Issuing VFLR to VF %d\n", vf); 7317 pci_write_config_dword(vfdev, 0xA8, 0x00008000); 7318 } 7319 7320 pci_cleanup_aer_uncorrect_error_status(pdev); 7321 } 7322 7323 /* 7324 * Even though the error may have occurred on the other port 7325 * we still need to increment the vf error reference count for 7326 * both ports because the I/O resume function will be called 7327 * for both of them. 7328 */ 7329 adapter->vferr_refcount++; 7330 7331 return PCI_ERS_RESULT_RECOVERED; 7332 7333 skip_bad_vf_detection: 7334 #endif /* CONFIG_PCI_IOV */ 7335 netif_device_detach(netdev); 7336 7337 if (state == pci_channel_io_perm_failure) 7338 return PCI_ERS_RESULT_DISCONNECT; 7339 7340 if (netif_running(netdev)) 7341 ixgbe_down(adapter); 7342 pci_disable_device(pdev); 7343 7344 /* Request a slot reset. */ 7345 return PCI_ERS_RESULT_NEED_RESET; 7346 } 7347 7348 /** 7349 * ixgbe_io_slot_reset - called after the pci bus has been reset. 7350 * @pdev: Pointer to PCI device 7351 * 7352 * Restart the card from scratch, as if from a cold-boot. 7353 */ 7354 static pci_ers_result_t ixgbe_io_slot_reset(struct pci_dev *pdev) 7355 { 7356 struct ixgbe_adapter *adapter = pci_get_drvdata(pdev); 7357 pci_ers_result_t result; 7358 int err; 7359 7360 if (pci_enable_device_mem(pdev)) { 7361 e_err(probe, "Cannot re-enable PCI device after reset.\n"); 7362 result = PCI_ERS_RESULT_DISCONNECT; 7363 } else { 7364 pci_set_master(pdev); 7365 pci_restore_state(pdev); 7366 pci_save_state(pdev); 7367 7368 pci_wake_from_d3(pdev, false); 7369 7370 ixgbe_reset(adapter); 7371 IXGBE_WRITE_REG(&adapter->hw, IXGBE_WUS, ~0); 7372 result = PCI_ERS_RESULT_RECOVERED; 7373 } 7374 7375 err = pci_cleanup_aer_uncorrect_error_status(pdev); 7376 if (err) { 7377 e_dev_err("pci_cleanup_aer_uncorrect_error_status " 7378 "failed 0x%0x\n", err); 7379 /* non-fatal, continue */ 7380 } 7381 7382 return result; 7383 } 7384 7385 /** 7386 * ixgbe_io_resume - called when traffic can start flowing again. 7387 * @pdev: Pointer to PCI device 7388 * 7389 * This callback is called when the error recovery driver tells us that 7390 * its OK to resume normal operation. 7391 */ 7392 static void ixgbe_io_resume(struct pci_dev *pdev) 7393 { 7394 struct ixgbe_adapter *adapter = pci_get_drvdata(pdev); 7395 struct net_device *netdev = adapter->netdev; 7396 7397 #ifdef CONFIG_PCI_IOV 7398 if (adapter->vferr_refcount) { 7399 e_info(drv, "Resuming after VF err\n"); 7400 adapter->vferr_refcount--; 7401 return; 7402 } 7403 7404 #endif 7405 if (netif_running(netdev)) 7406 ixgbe_up(adapter); 7407 7408 netif_device_attach(netdev); 7409 } 7410 7411 static struct pci_error_handlers ixgbe_err_handler = { 7412 .error_detected = ixgbe_io_error_detected, 7413 .slot_reset = ixgbe_io_slot_reset, 7414 .resume = ixgbe_io_resume, 7415 }; 7416 7417 static struct pci_driver ixgbe_driver = { 7418 .name = ixgbe_driver_name, 7419 .id_table = ixgbe_pci_tbl, 7420 .probe = ixgbe_probe, 7421 .remove = __devexit_p(ixgbe_remove), 7422 #ifdef CONFIG_PM 7423 .suspend = ixgbe_suspend, 7424 .resume = ixgbe_resume, 7425 #endif 7426 .shutdown = ixgbe_shutdown, 7427 .err_handler = &ixgbe_err_handler 7428 }; 7429 7430 /** 7431 * ixgbe_init_module - Driver Registration Routine 7432 * 7433 * ixgbe_init_module is the first routine called when the driver is 7434 * loaded. All it does is register with the PCI subsystem. 7435 **/ 7436 static int __init ixgbe_init_module(void) 7437 { 7438 int ret; 7439 pr_info("%s - version %s\n", ixgbe_driver_string, ixgbe_driver_version); 7440 pr_info("%s\n", ixgbe_copyright); 7441 7442 #ifdef CONFIG_IXGBE_DCA 7443 dca_register_notify(&dca_notifier); 7444 #endif 7445 7446 ret = pci_register_driver(&ixgbe_driver); 7447 return ret; 7448 } 7449 7450 module_init(ixgbe_init_module); 7451 7452 /** 7453 * ixgbe_exit_module - Driver Exit Cleanup Routine 7454 * 7455 * ixgbe_exit_module is called just before the driver is removed 7456 * from memory. 7457 **/ 7458 static void __exit ixgbe_exit_module(void) 7459 { 7460 #ifdef CONFIG_IXGBE_DCA 7461 dca_unregister_notify(&dca_notifier); 7462 #endif 7463 pci_unregister_driver(&ixgbe_driver); 7464 rcu_barrier(); /* Wait for completion of call_rcu()'s */ 7465 } 7466 7467 #ifdef CONFIG_IXGBE_DCA 7468 static int ixgbe_notify_dca(struct notifier_block *nb, unsigned long event, 7469 void *p) 7470 { 7471 int ret_val; 7472 7473 ret_val = driver_for_each_device(&ixgbe_driver.driver, NULL, &event, 7474 __ixgbe_notify_dca); 7475 7476 return ret_val ? NOTIFY_BAD : NOTIFY_DONE; 7477 } 7478 7479 #endif /* CONFIG_IXGBE_DCA */ 7480 7481 module_exit(ixgbe_exit_module); 7482 7483 /* ixgbe_main.c */ 7484