1 /* Intel PRO/1000 Linux driver 2 * Copyright(c) 1999 - 2015 Intel Corporation. 3 * 4 * This program is free software; you can redistribute it and/or modify it 5 * under the terms and conditions of the GNU General Public License, 6 * version 2, as published by the Free Software Foundation. 7 * 8 * This program is distributed in the hope it will be useful, but WITHOUT 9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 11 * more details. 12 * 13 * The full GNU General Public License is included in this distribution in 14 * the file called "COPYING". 15 * 16 * Contact Information: 17 * Linux NICS <linux.nics@intel.com> 18 * e1000-devel Mailing List <e1000-devel@lists.sourceforge.net> 19 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 20 */ 21 22 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 23 24 #include <linux/module.h> 25 #include <linux/types.h> 26 #include <linux/init.h> 27 #include <linux/pci.h> 28 #include <linux/vmalloc.h> 29 #include <linux/pagemap.h> 30 #include <linux/delay.h> 31 #include <linux/netdevice.h> 32 #include <linux/interrupt.h> 33 #include <linux/tcp.h> 34 #include <linux/ipv6.h> 35 #include <linux/slab.h> 36 #include <net/checksum.h> 37 #include <net/ip6_checksum.h> 38 #include <linux/ethtool.h> 39 #include <linux/if_vlan.h> 40 #include <linux/cpu.h> 41 #include <linux/smp.h> 42 #include <linux/pm_qos.h> 43 #include <linux/pm_runtime.h> 44 #include <linux/aer.h> 45 #include <linux/prefetch.h> 46 47 #include "e1000.h" 48 49 #define DRV_EXTRAVERSION "-k" 50 51 #define DRV_VERSION "3.2.6" DRV_EXTRAVERSION 52 char e1000e_driver_name[] = "e1000e"; 53 const char e1000e_driver_version[] = DRV_VERSION; 54 55 #define DEFAULT_MSG_ENABLE (NETIF_MSG_DRV|NETIF_MSG_PROBE|NETIF_MSG_LINK) 56 static int debug = -1; 57 module_param(debug, int, 0); 58 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)"); 59 60 static const struct e1000_info *e1000_info_tbl[] = { 61 [board_82571] = &e1000_82571_info, 62 [board_82572] = &e1000_82572_info, 63 [board_82573] = &e1000_82573_info, 64 [board_82574] = &e1000_82574_info, 65 [board_82583] = &e1000_82583_info, 66 [board_80003es2lan] = &e1000_es2_info, 67 [board_ich8lan] = &e1000_ich8_info, 68 [board_ich9lan] = &e1000_ich9_info, 69 [board_ich10lan] = &e1000_ich10_info, 70 [board_pchlan] = &e1000_pch_info, 71 [board_pch2lan] = &e1000_pch2_info, 72 [board_pch_lpt] = &e1000_pch_lpt_info, 73 [board_pch_spt] = &e1000_pch_spt_info, 74 }; 75 76 struct e1000_reg_info { 77 u32 ofs; 78 char *name; 79 }; 80 81 static const struct e1000_reg_info e1000_reg_info_tbl[] = { 82 /* General Registers */ 83 {E1000_CTRL, "CTRL"}, 84 {E1000_STATUS, "STATUS"}, 85 {E1000_CTRL_EXT, "CTRL_EXT"}, 86 87 /* Interrupt Registers */ 88 {E1000_ICR, "ICR"}, 89 90 /* Rx Registers */ 91 {E1000_RCTL, "RCTL"}, 92 {E1000_RDLEN(0), "RDLEN"}, 93 {E1000_RDH(0), "RDH"}, 94 {E1000_RDT(0), "RDT"}, 95 {E1000_RDTR, "RDTR"}, 96 {E1000_RXDCTL(0), "RXDCTL"}, 97 {E1000_ERT, "ERT"}, 98 {E1000_RDBAL(0), "RDBAL"}, 99 {E1000_RDBAH(0), "RDBAH"}, 100 {E1000_RDFH, "RDFH"}, 101 {E1000_RDFT, "RDFT"}, 102 {E1000_RDFHS, "RDFHS"}, 103 {E1000_RDFTS, "RDFTS"}, 104 {E1000_RDFPC, "RDFPC"}, 105 106 /* Tx Registers */ 107 {E1000_TCTL, "TCTL"}, 108 {E1000_TDBAL(0), "TDBAL"}, 109 {E1000_TDBAH(0), "TDBAH"}, 110 {E1000_TDLEN(0), "TDLEN"}, 111 {E1000_TDH(0), "TDH"}, 112 {E1000_TDT(0), "TDT"}, 113 {E1000_TIDV, "TIDV"}, 114 {E1000_TXDCTL(0), "TXDCTL"}, 115 {E1000_TADV, "TADV"}, 116 {E1000_TARC(0), "TARC"}, 117 {E1000_TDFH, "TDFH"}, 118 {E1000_TDFT, "TDFT"}, 119 {E1000_TDFHS, "TDFHS"}, 120 {E1000_TDFTS, "TDFTS"}, 121 {E1000_TDFPC, "TDFPC"}, 122 123 /* List Terminator */ 124 {0, NULL} 125 }; 126 127 /** 128 * __ew32_prepare - prepare to write to MAC CSR register on certain parts 129 * @hw: pointer to the HW structure 130 * 131 * When updating the MAC CSR registers, the Manageability Engine (ME) could 132 * be accessing the registers at the same time. Normally, this is handled in 133 * h/w by an arbiter but on some parts there is a bug that acknowledges Host 134 * accesses later than it should which could result in the register to have 135 * an incorrect value. Workaround this by checking the FWSM register which 136 * has bit 24 set while ME is accessing MAC CSR registers, wait if it is set 137 * and try again a number of times. 138 **/ 139 s32 __ew32_prepare(struct e1000_hw *hw) 140 { 141 s32 i = E1000_ICH_FWSM_PCIM2PCI_COUNT; 142 143 while ((er32(FWSM) & E1000_ICH_FWSM_PCIM2PCI) && --i) 144 udelay(50); 145 146 return i; 147 } 148 149 void __ew32(struct e1000_hw *hw, unsigned long reg, u32 val) 150 { 151 if (hw->adapter->flags2 & FLAG2_PCIM2PCI_ARBITER_WA) 152 __ew32_prepare(hw); 153 154 writel(val, hw->hw_addr + reg); 155 } 156 157 /** 158 * e1000_regdump - register printout routine 159 * @hw: pointer to the HW structure 160 * @reginfo: pointer to the register info table 161 **/ 162 static void e1000_regdump(struct e1000_hw *hw, struct e1000_reg_info *reginfo) 163 { 164 int n = 0; 165 char rname[16]; 166 u32 regs[8]; 167 168 switch (reginfo->ofs) { 169 case E1000_RXDCTL(0): 170 for (n = 0; n < 2; n++) 171 regs[n] = __er32(hw, E1000_RXDCTL(n)); 172 break; 173 case E1000_TXDCTL(0): 174 for (n = 0; n < 2; n++) 175 regs[n] = __er32(hw, E1000_TXDCTL(n)); 176 break; 177 case E1000_TARC(0): 178 for (n = 0; n < 2; n++) 179 regs[n] = __er32(hw, E1000_TARC(n)); 180 break; 181 default: 182 pr_info("%-15s %08x\n", 183 reginfo->name, __er32(hw, reginfo->ofs)); 184 return; 185 } 186 187 snprintf(rname, 16, "%s%s", reginfo->name, "[0-1]"); 188 pr_info("%-15s %08x %08x\n", rname, regs[0], regs[1]); 189 } 190 191 static void e1000e_dump_ps_pages(struct e1000_adapter *adapter, 192 struct e1000_buffer *bi) 193 { 194 int i; 195 struct e1000_ps_page *ps_page; 196 197 for (i = 0; i < adapter->rx_ps_pages; i++) { 198 ps_page = &bi->ps_pages[i]; 199 200 if (ps_page->page) { 201 pr_info("packet dump for ps_page %d:\n", i); 202 print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 203 16, 1, page_address(ps_page->page), 204 PAGE_SIZE, true); 205 } 206 } 207 } 208 209 /** 210 * e1000e_dump - Print registers, Tx-ring and Rx-ring 211 * @adapter: board private structure 212 **/ 213 static void e1000e_dump(struct e1000_adapter *adapter) 214 { 215 struct net_device *netdev = adapter->netdev; 216 struct e1000_hw *hw = &adapter->hw; 217 struct e1000_reg_info *reginfo; 218 struct e1000_ring *tx_ring = adapter->tx_ring; 219 struct e1000_tx_desc *tx_desc; 220 struct my_u0 { 221 __le64 a; 222 __le64 b; 223 } *u0; 224 struct e1000_buffer *buffer_info; 225 struct e1000_ring *rx_ring = adapter->rx_ring; 226 union e1000_rx_desc_packet_split *rx_desc_ps; 227 union e1000_rx_desc_extended *rx_desc; 228 struct my_u1 { 229 __le64 a; 230 __le64 b; 231 __le64 c; 232 __le64 d; 233 } *u1; 234 u32 staterr; 235 int i = 0; 236 237 if (!netif_msg_hw(adapter)) 238 return; 239 240 /* Print netdevice Info */ 241 if (netdev) { 242 dev_info(&adapter->pdev->dev, "Net device Info\n"); 243 pr_info("Device Name state trans_start\n"); 244 pr_info("%-15s %016lX %016lX\n", netdev->name, 245 netdev->state, dev_trans_start(netdev)); 246 } 247 248 /* Print Registers */ 249 dev_info(&adapter->pdev->dev, "Register Dump\n"); 250 pr_info(" Register Name Value\n"); 251 for (reginfo = (struct e1000_reg_info *)e1000_reg_info_tbl; 252 reginfo->name; reginfo++) { 253 e1000_regdump(hw, reginfo); 254 } 255 256 /* Print Tx Ring Summary */ 257 if (!netdev || !netif_running(netdev)) 258 return; 259 260 dev_info(&adapter->pdev->dev, "Tx Ring Summary\n"); 261 pr_info("Queue [NTU] [NTC] [bi(ntc)->dma ] leng ntw timestamp\n"); 262 buffer_info = &tx_ring->buffer_info[tx_ring->next_to_clean]; 263 pr_info(" %5d %5X %5X %016llX %04X %3X %016llX\n", 264 0, tx_ring->next_to_use, tx_ring->next_to_clean, 265 (unsigned long long)buffer_info->dma, 266 buffer_info->length, 267 buffer_info->next_to_watch, 268 (unsigned long long)buffer_info->time_stamp); 269 270 /* Print Tx Ring */ 271 if (!netif_msg_tx_done(adapter)) 272 goto rx_ring_summary; 273 274 dev_info(&adapter->pdev->dev, "Tx Ring Dump\n"); 275 276 /* Transmit Descriptor Formats - DEXT[29] is 0 (Legacy) or 1 (Extended) 277 * 278 * Legacy Transmit Descriptor 279 * +--------------------------------------------------------------+ 280 * 0 | Buffer Address [63:0] (Reserved on Write Back) | 281 * +--------------------------------------------------------------+ 282 * 8 | Special | CSS | Status | CMD | CSO | Length | 283 * +--------------------------------------------------------------+ 284 * 63 48 47 36 35 32 31 24 23 16 15 0 285 * 286 * Extended Context Descriptor (DTYP=0x0) for TSO or checksum offload 287 * 63 48 47 40 39 32 31 16 15 8 7 0 288 * +----------------------------------------------------------------+ 289 * 0 | TUCSE | TUCS0 | TUCSS | IPCSE | IPCS0 | IPCSS | 290 * +----------------------------------------------------------------+ 291 * 8 | MSS | HDRLEN | RSV | STA | TUCMD | DTYP | PAYLEN | 292 * +----------------------------------------------------------------+ 293 * 63 48 47 40 39 36 35 32 31 24 23 20 19 0 294 * 295 * Extended Data Descriptor (DTYP=0x1) 296 * +----------------------------------------------------------------+ 297 * 0 | Buffer Address [63:0] | 298 * +----------------------------------------------------------------+ 299 * 8 | VLAN tag | POPTS | Rsvd | Status | Command | DTYP | DTALEN | 300 * +----------------------------------------------------------------+ 301 * 63 48 47 40 39 36 35 32 31 24 23 20 19 0 302 */ 303 pr_info("Tl[desc] [address 63:0 ] [SpeCssSCmCsLen] [bi->dma ] leng ntw timestamp bi->skb <-- Legacy format\n"); 304 pr_info("Tc[desc] [Ce CoCsIpceCoS] [MssHlRSCm0Plen] [bi->dma ] leng ntw timestamp bi->skb <-- Ext Context format\n"); 305 pr_info("Td[desc] [address 63:0 ] [VlaPoRSCm1Dlen] [bi->dma ] leng ntw timestamp bi->skb <-- Ext Data format\n"); 306 for (i = 0; tx_ring->desc && (i < tx_ring->count); i++) { 307 const char *next_desc; 308 tx_desc = E1000_TX_DESC(*tx_ring, i); 309 buffer_info = &tx_ring->buffer_info[i]; 310 u0 = (struct my_u0 *)tx_desc; 311 if (i == tx_ring->next_to_use && i == tx_ring->next_to_clean) 312 next_desc = " NTC/U"; 313 else if (i == tx_ring->next_to_use) 314 next_desc = " NTU"; 315 else if (i == tx_ring->next_to_clean) 316 next_desc = " NTC"; 317 else 318 next_desc = ""; 319 pr_info("T%c[0x%03X] %016llX %016llX %016llX %04X %3X %016llX %p%s\n", 320 (!(le64_to_cpu(u0->b) & BIT(29)) ? 'l' : 321 ((le64_to_cpu(u0->b) & BIT(20)) ? 'd' : 'c')), 322 i, 323 (unsigned long long)le64_to_cpu(u0->a), 324 (unsigned long long)le64_to_cpu(u0->b), 325 (unsigned long long)buffer_info->dma, 326 buffer_info->length, buffer_info->next_to_watch, 327 (unsigned long long)buffer_info->time_stamp, 328 buffer_info->skb, next_desc); 329 330 if (netif_msg_pktdata(adapter) && buffer_info->skb) 331 print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 332 16, 1, buffer_info->skb->data, 333 buffer_info->skb->len, true); 334 } 335 336 /* Print Rx Ring Summary */ 337 rx_ring_summary: 338 dev_info(&adapter->pdev->dev, "Rx Ring Summary\n"); 339 pr_info("Queue [NTU] [NTC]\n"); 340 pr_info(" %5d %5X %5X\n", 341 0, rx_ring->next_to_use, rx_ring->next_to_clean); 342 343 /* Print Rx Ring */ 344 if (!netif_msg_rx_status(adapter)) 345 return; 346 347 dev_info(&adapter->pdev->dev, "Rx Ring Dump\n"); 348 switch (adapter->rx_ps_pages) { 349 case 1: 350 case 2: 351 case 3: 352 /* [Extended] Packet Split Receive Descriptor Format 353 * 354 * +-----------------------------------------------------+ 355 * 0 | Buffer Address 0 [63:0] | 356 * +-----------------------------------------------------+ 357 * 8 | Buffer Address 1 [63:0] | 358 * +-----------------------------------------------------+ 359 * 16 | Buffer Address 2 [63:0] | 360 * +-----------------------------------------------------+ 361 * 24 | Buffer Address 3 [63:0] | 362 * +-----------------------------------------------------+ 363 */ 364 pr_info("R [desc] [buffer 0 63:0 ] [buffer 1 63:0 ] [buffer 2 63:0 ] [buffer 3 63:0 ] [bi->dma ] [bi->skb] <-- Ext Pkt Split format\n"); 365 /* [Extended] Receive Descriptor (Write-Back) Format 366 * 367 * 63 48 47 32 31 13 12 8 7 4 3 0 368 * +------------------------------------------------------+ 369 * 0 | Packet | IP | Rsvd | MRQ | Rsvd | MRQ RSS | 370 * | Checksum | Ident | | Queue | | Type | 371 * +------------------------------------------------------+ 372 * 8 | VLAN Tag | Length | Extended Error | Extended Status | 373 * +------------------------------------------------------+ 374 * 63 48 47 32 31 20 19 0 375 */ 376 pr_info("RWB[desc] [ck ipid mrqhsh] [vl l0 ee es] [ l3 l2 l1 hs] [reserved ] ---------------- [bi->skb] <-- Ext Rx Write-Back format\n"); 377 for (i = 0; i < rx_ring->count; i++) { 378 const char *next_desc; 379 buffer_info = &rx_ring->buffer_info[i]; 380 rx_desc_ps = E1000_RX_DESC_PS(*rx_ring, i); 381 u1 = (struct my_u1 *)rx_desc_ps; 382 staterr = 383 le32_to_cpu(rx_desc_ps->wb.middle.status_error); 384 385 if (i == rx_ring->next_to_use) 386 next_desc = " NTU"; 387 else if (i == rx_ring->next_to_clean) 388 next_desc = " NTC"; 389 else 390 next_desc = ""; 391 392 if (staterr & E1000_RXD_STAT_DD) { 393 /* Descriptor Done */ 394 pr_info("%s[0x%03X] %016llX %016llX %016llX %016llX ---------------- %p%s\n", 395 "RWB", i, 396 (unsigned long long)le64_to_cpu(u1->a), 397 (unsigned long long)le64_to_cpu(u1->b), 398 (unsigned long long)le64_to_cpu(u1->c), 399 (unsigned long long)le64_to_cpu(u1->d), 400 buffer_info->skb, next_desc); 401 } else { 402 pr_info("%s[0x%03X] %016llX %016llX %016llX %016llX %016llX %p%s\n", 403 "R ", i, 404 (unsigned long long)le64_to_cpu(u1->a), 405 (unsigned long long)le64_to_cpu(u1->b), 406 (unsigned long long)le64_to_cpu(u1->c), 407 (unsigned long long)le64_to_cpu(u1->d), 408 (unsigned long long)buffer_info->dma, 409 buffer_info->skb, next_desc); 410 411 if (netif_msg_pktdata(adapter)) 412 e1000e_dump_ps_pages(adapter, 413 buffer_info); 414 } 415 } 416 break; 417 default: 418 case 0: 419 /* Extended Receive Descriptor (Read) Format 420 * 421 * +-----------------------------------------------------+ 422 * 0 | Buffer Address [63:0] | 423 * +-----------------------------------------------------+ 424 * 8 | Reserved | 425 * +-----------------------------------------------------+ 426 */ 427 pr_info("R [desc] [buf addr 63:0 ] [reserved 63:0 ] [bi->dma ] [bi->skb] <-- Ext (Read) format\n"); 428 /* Extended Receive Descriptor (Write-Back) Format 429 * 430 * 63 48 47 32 31 24 23 4 3 0 431 * +------------------------------------------------------+ 432 * | RSS Hash | | | | 433 * 0 +-------------------+ Rsvd | Reserved | MRQ RSS | 434 * | Packet | IP | | | Type | 435 * | Checksum | Ident | | | | 436 * +------------------------------------------------------+ 437 * 8 | VLAN Tag | Length | Extended Error | Extended Status | 438 * +------------------------------------------------------+ 439 * 63 48 47 32 31 20 19 0 440 */ 441 pr_info("RWB[desc] [cs ipid mrq] [vt ln xe xs] [bi->skb] <-- Ext (Write-Back) format\n"); 442 443 for (i = 0; i < rx_ring->count; i++) { 444 const char *next_desc; 445 446 buffer_info = &rx_ring->buffer_info[i]; 447 rx_desc = E1000_RX_DESC_EXT(*rx_ring, i); 448 u1 = (struct my_u1 *)rx_desc; 449 staterr = le32_to_cpu(rx_desc->wb.upper.status_error); 450 451 if (i == rx_ring->next_to_use) 452 next_desc = " NTU"; 453 else if (i == rx_ring->next_to_clean) 454 next_desc = " NTC"; 455 else 456 next_desc = ""; 457 458 if (staterr & E1000_RXD_STAT_DD) { 459 /* Descriptor Done */ 460 pr_info("%s[0x%03X] %016llX %016llX ---------------- %p%s\n", 461 "RWB", i, 462 (unsigned long long)le64_to_cpu(u1->a), 463 (unsigned long long)le64_to_cpu(u1->b), 464 buffer_info->skb, next_desc); 465 } else { 466 pr_info("%s[0x%03X] %016llX %016llX %016llX %p%s\n", 467 "R ", i, 468 (unsigned long long)le64_to_cpu(u1->a), 469 (unsigned long long)le64_to_cpu(u1->b), 470 (unsigned long long)buffer_info->dma, 471 buffer_info->skb, next_desc); 472 473 if (netif_msg_pktdata(adapter) && 474 buffer_info->skb) 475 print_hex_dump(KERN_INFO, "", 476 DUMP_PREFIX_ADDRESS, 16, 477 1, 478 buffer_info->skb->data, 479 adapter->rx_buffer_len, 480 true); 481 } 482 } 483 } 484 } 485 486 /** 487 * e1000_desc_unused - calculate if we have unused descriptors 488 **/ 489 static int e1000_desc_unused(struct e1000_ring *ring) 490 { 491 if (ring->next_to_clean > ring->next_to_use) 492 return ring->next_to_clean - ring->next_to_use - 1; 493 494 return ring->count + ring->next_to_clean - ring->next_to_use - 1; 495 } 496 497 /** 498 * e1000e_systim_to_hwtstamp - convert system time value to hw time stamp 499 * @adapter: board private structure 500 * @hwtstamps: time stamp structure to update 501 * @systim: unsigned 64bit system time value. 502 * 503 * Convert the system time value stored in the RX/TXSTMP registers into a 504 * hwtstamp which can be used by the upper level time stamping functions. 505 * 506 * The 'systim_lock' spinlock is used to protect the consistency of the 507 * system time value. This is needed because reading the 64 bit time 508 * value involves reading two 32 bit registers. The first read latches the 509 * value. 510 **/ 511 static void e1000e_systim_to_hwtstamp(struct e1000_adapter *adapter, 512 struct skb_shared_hwtstamps *hwtstamps, 513 u64 systim) 514 { 515 u64 ns; 516 unsigned long flags; 517 518 spin_lock_irqsave(&adapter->systim_lock, flags); 519 ns = timecounter_cyc2time(&adapter->tc, systim); 520 spin_unlock_irqrestore(&adapter->systim_lock, flags); 521 522 memset(hwtstamps, 0, sizeof(*hwtstamps)); 523 hwtstamps->hwtstamp = ns_to_ktime(ns); 524 } 525 526 /** 527 * e1000e_rx_hwtstamp - utility function which checks for Rx time stamp 528 * @adapter: board private structure 529 * @status: descriptor extended error and status field 530 * @skb: particular skb to include time stamp 531 * 532 * If the time stamp is valid, convert it into the timecounter ns value 533 * and store that result into the shhwtstamps structure which is passed 534 * up the network stack. 535 **/ 536 static void e1000e_rx_hwtstamp(struct e1000_adapter *adapter, u32 status, 537 struct sk_buff *skb) 538 { 539 struct e1000_hw *hw = &adapter->hw; 540 u64 rxstmp; 541 542 if (!(adapter->flags & FLAG_HAS_HW_TIMESTAMP) || 543 !(status & E1000_RXDEXT_STATERR_TST) || 544 !(er32(TSYNCRXCTL) & E1000_TSYNCRXCTL_VALID)) 545 return; 546 547 /* The Rx time stamp registers contain the time stamp. No other 548 * received packet will be time stamped until the Rx time stamp 549 * registers are read. Because only one packet can be time stamped 550 * at a time, the register values must belong to this packet and 551 * therefore none of the other additional attributes need to be 552 * compared. 553 */ 554 rxstmp = (u64)er32(RXSTMPL); 555 rxstmp |= (u64)er32(RXSTMPH) << 32; 556 e1000e_systim_to_hwtstamp(adapter, skb_hwtstamps(skb), rxstmp); 557 558 adapter->flags2 &= ~FLAG2_CHECK_RX_HWTSTAMP; 559 } 560 561 /** 562 * e1000_receive_skb - helper function to handle Rx indications 563 * @adapter: board private structure 564 * @staterr: descriptor extended error and status field as written by hardware 565 * @vlan: descriptor vlan field as written by hardware (no le/be conversion) 566 * @skb: pointer to sk_buff to be indicated to stack 567 **/ 568 static void e1000_receive_skb(struct e1000_adapter *adapter, 569 struct net_device *netdev, struct sk_buff *skb, 570 u32 staterr, __le16 vlan) 571 { 572 u16 tag = le16_to_cpu(vlan); 573 574 e1000e_rx_hwtstamp(adapter, staterr, skb); 575 576 skb->protocol = eth_type_trans(skb, netdev); 577 578 if (staterr & E1000_RXD_STAT_VP) 579 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), tag); 580 581 napi_gro_receive(&adapter->napi, skb); 582 } 583 584 /** 585 * e1000_rx_checksum - Receive Checksum Offload 586 * @adapter: board private structure 587 * @status_err: receive descriptor status and error fields 588 * @csum: receive descriptor csum field 589 * @sk_buff: socket buffer with received data 590 **/ 591 static void e1000_rx_checksum(struct e1000_adapter *adapter, u32 status_err, 592 struct sk_buff *skb) 593 { 594 u16 status = (u16)status_err; 595 u8 errors = (u8)(status_err >> 24); 596 597 skb_checksum_none_assert(skb); 598 599 /* Rx checksum disabled */ 600 if (!(adapter->netdev->features & NETIF_F_RXCSUM)) 601 return; 602 603 /* Ignore Checksum bit is set */ 604 if (status & E1000_RXD_STAT_IXSM) 605 return; 606 607 /* TCP/UDP checksum error bit or IP checksum error bit is set */ 608 if (errors & (E1000_RXD_ERR_TCPE | E1000_RXD_ERR_IPE)) { 609 /* let the stack verify checksum errors */ 610 adapter->hw_csum_err++; 611 return; 612 } 613 614 /* TCP/UDP Checksum has not been calculated */ 615 if (!(status & (E1000_RXD_STAT_TCPCS | E1000_RXD_STAT_UDPCS))) 616 return; 617 618 /* It must be a TCP or UDP packet with a valid checksum */ 619 skb->ip_summed = CHECKSUM_UNNECESSARY; 620 adapter->hw_csum_good++; 621 } 622 623 static void e1000e_update_rdt_wa(struct e1000_ring *rx_ring, unsigned int i) 624 { 625 struct e1000_adapter *adapter = rx_ring->adapter; 626 struct e1000_hw *hw = &adapter->hw; 627 s32 ret_val = __ew32_prepare(hw); 628 629 writel(i, rx_ring->tail); 630 631 if (unlikely(!ret_val && (i != readl(rx_ring->tail)))) { 632 u32 rctl = er32(RCTL); 633 634 ew32(RCTL, rctl & ~E1000_RCTL_EN); 635 e_err("ME firmware caused invalid RDT - resetting\n"); 636 schedule_work(&adapter->reset_task); 637 } 638 } 639 640 static void e1000e_update_tdt_wa(struct e1000_ring *tx_ring, unsigned int i) 641 { 642 struct e1000_adapter *adapter = tx_ring->adapter; 643 struct e1000_hw *hw = &adapter->hw; 644 s32 ret_val = __ew32_prepare(hw); 645 646 writel(i, tx_ring->tail); 647 648 if (unlikely(!ret_val && (i != readl(tx_ring->tail)))) { 649 u32 tctl = er32(TCTL); 650 651 ew32(TCTL, tctl & ~E1000_TCTL_EN); 652 e_err("ME firmware caused invalid TDT - resetting\n"); 653 schedule_work(&adapter->reset_task); 654 } 655 } 656 657 /** 658 * e1000_alloc_rx_buffers - Replace used receive buffers 659 * @rx_ring: Rx descriptor ring 660 **/ 661 static void e1000_alloc_rx_buffers(struct e1000_ring *rx_ring, 662 int cleaned_count, gfp_t gfp) 663 { 664 struct e1000_adapter *adapter = rx_ring->adapter; 665 struct net_device *netdev = adapter->netdev; 666 struct pci_dev *pdev = adapter->pdev; 667 union e1000_rx_desc_extended *rx_desc; 668 struct e1000_buffer *buffer_info; 669 struct sk_buff *skb; 670 unsigned int i; 671 unsigned int bufsz = adapter->rx_buffer_len; 672 673 i = rx_ring->next_to_use; 674 buffer_info = &rx_ring->buffer_info[i]; 675 676 while (cleaned_count--) { 677 skb = buffer_info->skb; 678 if (skb) { 679 skb_trim(skb, 0); 680 goto map_skb; 681 } 682 683 skb = __netdev_alloc_skb_ip_align(netdev, bufsz, gfp); 684 if (!skb) { 685 /* Better luck next round */ 686 adapter->alloc_rx_buff_failed++; 687 break; 688 } 689 690 buffer_info->skb = skb; 691 map_skb: 692 buffer_info->dma = dma_map_single(&pdev->dev, skb->data, 693 adapter->rx_buffer_len, 694 DMA_FROM_DEVICE); 695 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) { 696 dev_err(&pdev->dev, "Rx DMA map failed\n"); 697 adapter->rx_dma_failed++; 698 break; 699 } 700 701 rx_desc = E1000_RX_DESC_EXT(*rx_ring, i); 702 rx_desc->read.buffer_addr = cpu_to_le64(buffer_info->dma); 703 704 if (unlikely(!(i & (E1000_RX_BUFFER_WRITE - 1)))) { 705 /* Force memory writes to complete before letting h/w 706 * know there are new descriptors to fetch. (Only 707 * applicable for weak-ordered memory model archs, 708 * such as IA-64). 709 */ 710 wmb(); 711 if (adapter->flags2 & FLAG2_PCIM2PCI_ARBITER_WA) 712 e1000e_update_rdt_wa(rx_ring, i); 713 else 714 writel(i, rx_ring->tail); 715 } 716 i++; 717 if (i == rx_ring->count) 718 i = 0; 719 buffer_info = &rx_ring->buffer_info[i]; 720 } 721 722 rx_ring->next_to_use = i; 723 } 724 725 /** 726 * e1000_alloc_rx_buffers_ps - Replace used receive buffers; packet split 727 * @rx_ring: Rx descriptor ring 728 **/ 729 static void e1000_alloc_rx_buffers_ps(struct e1000_ring *rx_ring, 730 int cleaned_count, gfp_t gfp) 731 { 732 struct e1000_adapter *adapter = rx_ring->adapter; 733 struct net_device *netdev = adapter->netdev; 734 struct pci_dev *pdev = adapter->pdev; 735 union e1000_rx_desc_packet_split *rx_desc; 736 struct e1000_buffer *buffer_info; 737 struct e1000_ps_page *ps_page; 738 struct sk_buff *skb; 739 unsigned int i, j; 740 741 i = rx_ring->next_to_use; 742 buffer_info = &rx_ring->buffer_info[i]; 743 744 while (cleaned_count--) { 745 rx_desc = E1000_RX_DESC_PS(*rx_ring, i); 746 747 for (j = 0; j < PS_PAGE_BUFFERS; j++) { 748 ps_page = &buffer_info->ps_pages[j]; 749 if (j >= adapter->rx_ps_pages) { 750 /* all unused desc entries get hw null ptr */ 751 rx_desc->read.buffer_addr[j + 1] = 752 ~cpu_to_le64(0); 753 continue; 754 } 755 if (!ps_page->page) { 756 ps_page->page = alloc_page(gfp); 757 if (!ps_page->page) { 758 adapter->alloc_rx_buff_failed++; 759 goto no_buffers; 760 } 761 ps_page->dma = dma_map_page(&pdev->dev, 762 ps_page->page, 763 0, PAGE_SIZE, 764 DMA_FROM_DEVICE); 765 if (dma_mapping_error(&pdev->dev, 766 ps_page->dma)) { 767 dev_err(&adapter->pdev->dev, 768 "Rx DMA page map failed\n"); 769 adapter->rx_dma_failed++; 770 goto no_buffers; 771 } 772 } 773 /* Refresh the desc even if buffer_addrs 774 * didn't change because each write-back 775 * erases this info. 776 */ 777 rx_desc->read.buffer_addr[j + 1] = 778 cpu_to_le64(ps_page->dma); 779 } 780 781 skb = __netdev_alloc_skb_ip_align(netdev, adapter->rx_ps_bsize0, 782 gfp); 783 784 if (!skb) { 785 adapter->alloc_rx_buff_failed++; 786 break; 787 } 788 789 buffer_info->skb = skb; 790 buffer_info->dma = dma_map_single(&pdev->dev, skb->data, 791 adapter->rx_ps_bsize0, 792 DMA_FROM_DEVICE); 793 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) { 794 dev_err(&pdev->dev, "Rx DMA map failed\n"); 795 adapter->rx_dma_failed++; 796 /* cleanup skb */ 797 dev_kfree_skb_any(skb); 798 buffer_info->skb = NULL; 799 break; 800 } 801 802 rx_desc->read.buffer_addr[0] = cpu_to_le64(buffer_info->dma); 803 804 if (unlikely(!(i & (E1000_RX_BUFFER_WRITE - 1)))) { 805 /* Force memory writes to complete before letting h/w 806 * know there are new descriptors to fetch. (Only 807 * applicable for weak-ordered memory model archs, 808 * such as IA-64). 809 */ 810 wmb(); 811 if (adapter->flags2 & FLAG2_PCIM2PCI_ARBITER_WA) 812 e1000e_update_rdt_wa(rx_ring, i << 1); 813 else 814 writel(i << 1, rx_ring->tail); 815 } 816 817 i++; 818 if (i == rx_ring->count) 819 i = 0; 820 buffer_info = &rx_ring->buffer_info[i]; 821 } 822 823 no_buffers: 824 rx_ring->next_to_use = i; 825 } 826 827 /** 828 * e1000_alloc_jumbo_rx_buffers - Replace used jumbo receive buffers 829 * @rx_ring: Rx descriptor ring 830 * @cleaned_count: number of buffers to allocate this pass 831 **/ 832 833 static void e1000_alloc_jumbo_rx_buffers(struct e1000_ring *rx_ring, 834 int cleaned_count, gfp_t gfp) 835 { 836 struct e1000_adapter *adapter = rx_ring->adapter; 837 struct net_device *netdev = adapter->netdev; 838 struct pci_dev *pdev = adapter->pdev; 839 union e1000_rx_desc_extended *rx_desc; 840 struct e1000_buffer *buffer_info; 841 struct sk_buff *skb; 842 unsigned int i; 843 unsigned int bufsz = 256 - 16; /* for skb_reserve */ 844 845 i = rx_ring->next_to_use; 846 buffer_info = &rx_ring->buffer_info[i]; 847 848 while (cleaned_count--) { 849 skb = buffer_info->skb; 850 if (skb) { 851 skb_trim(skb, 0); 852 goto check_page; 853 } 854 855 skb = __netdev_alloc_skb_ip_align(netdev, bufsz, gfp); 856 if (unlikely(!skb)) { 857 /* Better luck next round */ 858 adapter->alloc_rx_buff_failed++; 859 break; 860 } 861 862 buffer_info->skb = skb; 863 check_page: 864 /* allocate a new page if necessary */ 865 if (!buffer_info->page) { 866 buffer_info->page = alloc_page(gfp); 867 if (unlikely(!buffer_info->page)) { 868 adapter->alloc_rx_buff_failed++; 869 break; 870 } 871 } 872 873 if (!buffer_info->dma) { 874 buffer_info->dma = dma_map_page(&pdev->dev, 875 buffer_info->page, 0, 876 PAGE_SIZE, 877 DMA_FROM_DEVICE); 878 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) { 879 adapter->alloc_rx_buff_failed++; 880 break; 881 } 882 } 883 884 rx_desc = E1000_RX_DESC_EXT(*rx_ring, i); 885 rx_desc->read.buffer_addr = cpu_to_le64(buffer_info->dma); 886 887 if (unlikely(++i == rx_ring->count)) 888 i = 0; 889 buffer_info = &rx_ring->buffer_info[i]; 890 } 891 892 if (likely(rx_ring->next_to_use != i)) { 893 rx_ring->next_to_use = i; 894 if (unlikely(i-- == 0)) 895 i = (rx_ring->count - 1); 896 897 /* Force memory writes to complete before letting h/w 898 * know there are new descriptors to fetch. (Only 899 * applicable for weak-ordered memory model archs, 900 * such as IA-64). 901 */ 902 wmb(); 903 if (adapter->flags2 & FLAG2_PCIM2PCI_ARBITER_WA) 904 e1000e_update_rdt_wa(rx_ring, i); 905 else 906 writel(i, rx_ring->tail); 907 } 908 } 909 910 static inline void e1000_rx_hash(struct net_device *netdev, __le32 rss, 911 struct sk_buff *skb) 912 { 913 if (netdev->features & NETIF_F_RXHASH) 914 skb_set_hash(skb, le32_to_cpu(rss), PKT_HASH_TYPE_L3); 915 } 916 917 /** 918 * e1000_clean_rx_irq - Send received data up the network stack 919 * @rx_ring: Rx descriptor ring 920 * 921 * the return value indicates whether actual cleaning was done, there 922 * is no guarantee that everything was cleaned 923 **/ 924 static bool e1000_clean_rx_irq(struct e1000_ring *rx_ring, int *work_done, 925 int work_to_do) 926 { 927 struct e1000_adapter *adapter = rx_ring->adapter; 928 struct net_device *netdev = adapter->netdev; 929 struct pci_dev *pdev = adapter->pdev; 930 struct e1000_hw *hw = &adapter->hw; 931 union e1000_rx_desc_extended *rx_desc, *next_rxd; 932 struct e1000_buffer *buffer_info, *next_buffer; 933 u32 length, staterr; 934 unsigned int i; 935 int cleaned_count = 0; 936 bool cleaned = false; 937 unsigned int total_rx_bytes = 0, total_rx_packets = 0; 938 939 i = rx_ring->next_to_clean; 940 rx_desc = E1000_RX_DESC_EXT(*rx_ring, i); 941 staterr = le32_to_cpu(rx_desc->wb.upper.status_error); 942 buffer_info = &rx_ring->buffer_info[i]; 943 944 while (staterr & E1000_RXD_STAT_DD) { 945 struct sk_buff *skb; 946 947 if (*work_done >= work_to_do) 948 break; 949 (*work_done)++; 950 dma_rmb(); /* read descriptor and rx_buffer_info after status DD */ 951 952 skb = buffer_info->skb; 953 buffer_info->skb = NULL; 954 955 prefetch(skb->data - NET_IP_ALIGN); 956 957 i++; 958 if (i == rx_ring->count) 959 i = 0; 960 next_rxd = E1000_RX_DESC_EXT(*rx_ring, i); 961 prefetch(next_rxd); 962 963 next_buffer = &rx_ring->buffer_info[i]; 964 965 cleaned = true; 966 cleaned_count++; 967 dma_unmap_single(&pdev->dev, buffer_info->dma, 968 adapter->rx_buffer_len, DMA_FROM_DEVICE); 969 buffer_info->dma = 0; 970 971 length = le16_to_cpu(rx_desc->wb.upper.length); 972 973 /* !EOP means multiple descriptors were used to store a single 974 * packet, if that's the case we need to toss it. In fact, we 975 * need to toss every packet with the EOP bit clear and the 976 * next frame that _does_ have the EOP bit set, as it is by 977 * definition only a frame fragment 978 */ 979 if (unlikely(!(staterr & E1000_RXD_STAT_EOP))) 980 adapter->flags2 |= FLAG2_IS_DISCARDING; 981 982 if (adapter->flags2 & FLAG2_IS_DISCARDING) { 983 /* All receives must fit into a single buffer */ 984 e_dbg("Receive packet consumed multiple buffers\n"); 985 /* recycle */ 986 buffer_info->skb = skb; 987 if (staterr & E1000_RXD_STAT_EOP) 988 adapter->flags2 &= ~FLAG2_IS_DISCARDING; 989 goto next_desc; 990 } 991 992 if (unlikely((staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK) && 993 !(netdev->features & NETIF_F_RXALL))) { 994 /* recycle */ 995 buffer_info->skb = skb; 996 goto next_desc; 997 } 998 999 /* adjust length to remove Ethernet CRC */ 1000 if (!(adapter->flags2 & FLAG2_CRC_STRIPPING)) { 1001 /* If configured to store CRC, don't subtract FCS, 1002 * but keep the FCS bytes out of the total_rx_bytes 1003 * counter 1004 */ 1005 if (netdev->features & NETIF_F_RXFCS) 1006 total_rx_bytes -= 4; 1007 else 1008 length -= 4; 1009 } 1010 1011 total_rx_bytes += length; 1012 total_rx_packets++; 1013 1014 /* code added for copybreak, this should improve 1015 * performance for small packets with large amounts 1016 * of reassembly being done in the stack 1017 */ 1018 if (length < copybreak) { 1019 struct sk_buff *new_skb = 1020 napi_alloc_skb(&adapter->napi, length); 1021 if (new_skb) { 1022 skb_copy_to_linear_data_offset(new_skb, 1023 -NET_IP_ALIGN, 1024 (skb->data - 1025 NET_IP_ALIGN), 1026 (length + 1027 NET_IP_ALIGN)); 1028 /* save the skb in buffer_info as good */ 1029 buffer_info->skb = skb; 1030 skb = new_skb; 1031 } 1032 /* else just continue with the old one */ 1033 } 1034 /* end copybreak code */ 1035 skb_put(skb, length); 1036 1037 /* Receive Checksum Offload */ 1038 e1000_rx_checksum(adapter, staterr, skb); 1039 1040 e1000_rx_hash(netdev, rx_desc->wb.lower.hi_dword.rss, skb); 1041 1042 e1000_receive_skb(adapter, netdev, skb, staterr, 1043 rx_desc->wb.upper.vlan); 1044 1045 next_desc: 1046 rx_desc->wb.upper.status_error &= cpu_to_le32(~0xFF); 1047 1048 /* return some buffers to hardware, one at a time is too slow */ 1049 if (cleaned_count >= E1000_RX_BUFFER_WRITE) { 1050 adapter->alloc_rx_buf(rx_ring, cleaned_count, 1051 GFP_ATOMIC); 1052 cleaned_count = 0; 1053 } 1054 1055 /* use prefetched values */ 1056 rx_desc = next_rxd; 1057 buffer_info = next_buffer; 1058 1059 staterr = le32_to_cpu(rx_desc->wb.upper.status_error); 1060 } 1061 rx_ring->next_to_clean = i; 1062 1063 cleaned_count = e1000_desc_unused(rx_ring); 1064 if (cleaned_count) 1065 adapter->alloc_rx_buf(rx_ring, cleaned_count, GFP_ATOMIC); 1066 1067 adapter->total_rx_bytes += total_rx_bytes; 1068 adapter->total_rx_packets += total_rx_packets; 1069 return cleaned; 1070 } 1071 1072 static void e1000_put_txbuf(struct e1000_ring *tx_ring, 1073 struct e1000_buffer *buffer_info) 1074 { 1075 struct e1000_adapter *adapter = tx_ring->adapter; 1076 1077 if (buffer_info->dma) { 1078 if (buffer_info->mapped_as_page) 1079 dma_unmap_page(&adapter->pdev->dev, buffer_info->dma, 1080 buffer_info->length, DMA_TO_DEVICE); 1081 else 1082 dma_unmap_single(&adapter->pdev->dev, buffer_info->dma, 1083 buffer_info->length, DMA_TO_DEVICE); 1084 buffer_info->dma = 0; 1085 } 1086 if (buffer_info->skb) { 1087 dev_kfree_skb_any(buffer_info->skb); 1088 buffer_info->skb = NULL; 1089 } 1090 buffer_info->time_stamp = 0; 1091 } 1092 1093 static void e1000_print_hw_hang(struct work_struct *work) 1094 { 1095 struct e1000_adapter *adapter = container_of(work, 1096 struct e1000_adapter, 1097 print_hang_task); 1098 struct net_device *netdev = adapter->netdev; 1099 struct e1000_ring *tx_ring = adapter->tx_ring; 1100 unsigned int i = tx_ring->next_to_clean; 1101 unsigned int eop = tx_ring->buffer_info[i].next_to_watch; 1102 struct e1000_tx_desc *eop_desc = E1000_TX_DESC(*tx_ring, eop); 1103 struct e1000_hw *hw = &adapter->hw; 1104 u16 phy_status, phy_1000t_status, phy_ext_status; 1105 u16 pci_status; 1106 1107 if (test_bit(__E1000_DOWN, &adapter->state)) 1108 return; 1109 1110 if (!adapter->tx_hang_recheck && (adapter->flags2 & FLAG2_DMA_BURST)) { 1111 /* May be block on write-back, flush and detect again 1112 * flush pending descriptor writebacks to memory 1113 */ 1114 ew32(TIDV, adapter->tx_int_delay | E1000_TIDV_FPD); 1115 /* execute the writes immediately */ 1116 e1e_flush(); 1117 /* Due to rare timing issues, write to TIDV again to ensure 1118 * the write is successful 1119 */ 1120 ew32(TIDV, adapter->tx_int_delay | E1000_TIDV_FPD); 1121 /* execute the writes immediately */ 1122 e1e_flush(); 1123 adapter->tx_hang_recheck = true; 1124 return; 1125 } 1126 adapter->tx_hang_recheck = false; 1127 1128 if (er32(TDH(0)) == er32(TDT(0))) { 1129 e_dbg("false hang detected, ignoring\n"); 1130 return; 1131 } 1132 1133 /* Real hang detected */ 1134 netif_stop_queue(netdev); 1135 1136 e1e_rphy(hw, MII_BMSR, &phy_status); 1137 e1e_rphy(hw, MII_STAT1000, &phy_1000t_status); 1138 e1e_rphy(hw, MII_ESTATUS, &phy_ext_status); 1139 1140 pci_read_config_word(adapter->pdev, PCI_STATUS, &pci_status); 1141 1142 /* detected Hardware unit hang */ 1143 e_err("Detected Hardware Unit Hang:\n" 1144 " TDH <%x>\n" 1145 " TDT <%x>\n" 1146 " next_to_use <%x>\n" 1147 " next_to_clean <%x>\n" 1148 "buffer_info[next_to_clean]:\n" 1149 " time_stamp <%lx>\n" 1150 " next_to_watch <%x>\n" 1151 " jiffies <%lx>\n" 1152 " next_to_watch.status <%x>\n" 1153 "MAC Status <%x>\n" 1154 "PHY Status <%x>\n" 1155 "PHY 1000BASE-T Status <%x>\n" 1156 "PHY Extended Status <%x>\n" 1157 "PCI Status <%x>\n", 1158 readl(tx_ring->head), readl(tx_ring->tail), tx_ring->next_to_use, 1159 tx_ring->next_to_clean, tx_ring->buffer_info[eop].time_stamp, 1160 eop, jiffies, eop_desc->upper.fields.status, er32(STATUS), 1161 phy_status, phy_1000t_status, phy_ext_status, pci_status); 1162 1163 e1000e_dump(adapter); 1164 1165 /* Suggest workaround for known h/w issue */ 1166 if ((hw->mac.type == e1000_pchlan) && (er32(CTRL) & E1000_CTRL_TFCE)) 1167 e_err("Try turning off Tx pause (flow control) via ethtool\n"); 1168 } 1169 1170 /** 1171 * e1000e_tx_hwtstamp_work - check for Tx time stamp 1172 * @work: pointer to work struct 1173 * 1174 * This work function polls the TSYNCTXCTL valid bit to determine when a 1175 * timestamp has been taken for the current stored skb. The timestamp must 1176 * be for this skb because only one such packet is allowed in the queue. 1177 */ 1178 static void e1000e_tx_hwtstamp_work(struct work_struct *work) 1179 { 1180 struct e1000_adapter *adapter = container_of(work, struct e1000_adapter, 1181 tx_hwtstamp_work); 1182 struct e1000_hw *hw = &adapter->hw; 1183 1184 if (er32(TSYNCTXCTL) & E1000_TSYNCTXCTL_VALID) { 1185 struct skb_shared_hwtstamps shhwtstamps; 1186 u64 txstmp; 1187 1188 txstmp = er32(TXSTMPL); 1189 txstmp |= (u64)er32(TXSTMPH) << 32; 1190 1191 e1000e_systim_to_hwtstamp(adapter, &shhwtstamps, txstmp); 1192 1193 skb_tstamp_tx(adapter->tx_hwtstamp_skb, &shhwtstamps); 1194 dev_kfree_skb_any(adapter->tx_hwtstamp_skb); 1195 adapter->tx_hwtstamp_skb = NULL; 1196 } else if (time_after(jiffies, adapter->tx_hwtstamp_start 1197 + adapter->tx_timeout_factor * HZ)) { 1198 dev_kfree_skb_any(adapter->tx_hwtstamp_skb); 1199 adapter->tx_hwtstamp_skb = NULL; 1200 adapter->tx_hwtstamp_timeouts++; 1201 e_warn("clearing Tx timestamp hang\n"); 1202 } else { 1203 /* reschedule to check later */ 1204 schedule_work(&adapter->tx_hwtstamp_work); 1205 } 1206 } 1207 1208 /** 1209 * e1000_clean_tx_irq - Reclaim resources after transmit completes 1210 * @tx_ring: Tx descriptor ring 1211 * 1212 * the return value indicates whether actual cleaning was done, there 1213 * is no guarantee that everything was cleaned 1214 **/ 1215 static bool e1000_clean_tx_irq(struct e1000_ring *tx_ring) 1216 { 1217 struct e1000_adapter *adapter = tx_ring->adapter; 1218 struct net_device *netdev = adapter->netdev; 1219 struct e1000_hw *hw = &adapter->hw; 1220 struct e1000_tx_desc *tx_desc, *eop_desc; 1221 struct e1000_buffer *buffer_info; 1222 unsigned int i, eop; 1223 unsigned int count = 0; 1224 unsigned int total_tx_bytes = 0, total_tx_packets = 0; 1225 unsigned int bytes_compl = 0, pkts_compl = 0; 1226 1227 i = tx_ring->next_to_clean; 1228 eop = tx_ring->buffer_info[i].next_to_watch; 1229 eop_desc = E1000_TX_DESC(*tx_ring, eop); 1230 1231 while ((eop_desc->upper.data & cpu_to_le32(E1000_TXD_STAT_DD)) && 1232 (count < tx_ring->count)) { 1233 bool cleaned = false; 1234 1235 dma_rmb(); /* read buffer_info after eop_desc */ 1236 for (; !cleaned; count++) { 1237 tx_desc = E1000_TX_DESC(*tx_ring, i); 1238 buffer_info = &tx_ring->buffer_info[i]; 1239 cleaned = (i == eop); 1240 1241 if (cleaned) { 1242 total_tx_packets += buffer_info->segs; 1243 total_tx_bytes += buffer_info->bytecount; 1244 if (buffer_info->skb) { 1245 bytes_compl += buffer_info->skb->len; 1246 pkts_compl++; 1247 } 1248 } 1249 1250 e1000_put_txbuf(tx_ring, buffer_info); 1251 tx_desc->upper.data = 0; 1252 1253 i++; 1254 if (i == tx_ring->count) 1255 i = 0; 1256 } 1257 1258 if (i == tx_ring->next_to_use) 1259 break; 1260 eop = tx_ring->buffer_info[i].next_to_watch; 1261 eop_desc = E1000_TX_DESC(*tx_ring, eop); 1262 } 1263 1264 tx_ring->next_to_clean = i; 1265 1266 netdev_completed_queue(netdev, pkts_compl, bytes_compl); 1267 1268 #define TX_WAKE_THRESHOLD 32 1269 if (count && netif_carrier_ok(netdev) && 1270 e1000_desc_unused(tx_ring) >= TX_WAKE_THRESHOLD) { 1271 /* Make sure that anybody stopping the queue after this 1272 * sees the new next_to_clean. 1273 */ 1274 smp_mb(); 1275 1276 if (netif_queue_stopped(netdev) && 1277 !(test_bit(__E1000_DOWN, &adapter->state))) { 1278 netif_wake_queue(netdev); 1279 ++adapter->restart_queue; 1280 } 1281 } 1282 1283 if (adapter->detect_tx_hung) { 1284 /* Detect a transmit hang in hardware, this serializes the 1285 * check with the clearing of time_stamp and movement of i 1286 */ 1287 adapter->detect_tx_hung = false; 1288 if (tx_ring->buffer_info[i].time_stamp && 1289 time_after(jiffies, tx_ring->buffer_info[i].time_stamp 1290 + (adapter->tx_timeout_factor * HZ)) && 1291 !(er32(STATUS) & E1000_STATUS_TXOFF)) 1292 schedule_work(&adapter->print_hang_task); 1293 else 1294 adapter->tx_hang_recheck = false; 1295 } 1296 adapter->total_tx_bytes += total_tx_bytes; 1297 adapter->total_tx_packets += total_tx_packets; 1298 return count < tx_ring->count; 1299 } 1300 1301 /** 1302 * e1000_clean_rx_irq_ps - Send received data up the network stack; packet split 1303 * @rx_ring: Rx descriptor ring 1304 * 1305 * the return value indicates whether actual cleaning was done, there 1306 * is no guarantee that everything was cleaned 1307 **/ 1308 static bool e1000_clean_rx_irq_ps(struct e1000_ring *rx_ring, int *work_done, 1309 int work_to_do) 1310 { 1311 struct e1000_adapter *adapter = rx_ring->adapter; 1312 struct e1000_hw *hw = &adapter->hw; 1313 union e1000_rx_desc_packet_split *rx_desc, *next_rxd; 1314 struct net_device *netdev = adapter->netdev; 1315 struct pci_dev *pdev = adapter->pdev; 1316 struct e1000_buffer *buffer_info, *next_buffer; 1317 struct e1000_ps_page *ps_page; 1318 struct sk_buff *skb; 1319 unsigned int i, j; 1320 u32 length, staterr; 1321 int cleaned_count = 0; 1322 bool cleaned = false; 1323 unsigned int total_rx_bytes = 0, total_rx_packets = 0; 1324 1325 i = rx_ring->next_to_clean; 1326 rx_desc = E1000_RX_DESC_PS(*rx_ring, i); 1327 staterr = le32_to_cpu(rx_desc->wb.middle.status_error); 1328 buffer_info = &rx_ring->buffer_info[i]; 1329 1330 while (staterr & E1000_RXD_STAT_DD) { 1331 if (*work_done >= work_to_do) 1332 break; 1333 (*work_done)++; 1334 skb = buffer_info->skb; 1335 dma_rmb(); /* read descriptor and rx_buffer_info after status DD */ 1336 1337 /* in the packet split case this is header only */ 1338 prefetch(skb->data - NET_IP_ALIGN); 1339 1340 i++; 1341 if (i == rx_ring->count) 1342 i = 0; 1343 next_rxd = E1000_RX_DESC_PS(*rx_ring, i); 1344 prefetch(next_rxd); 1345 1346 next_buffer = &rx_ring->buffer_info[i]; 1347 1348 cleaned = true; 1349 cleaned_count++; 1350 dma_unmap_single(&pdev->dev, buffer_info->dma, 1351 adapter->rx_ps_bsize0, DMA_FROM_DEVICE); 1352 buffer_info->dma = 0; 1353 1354 /* see !EOP comment in other Rx routine */ 1355 if (!(staterr & E1000_RXD_STAT_EOP)) 1356 adapter->flags2 |= FLAG2_IS_DISCARDING; 1357 1358 if (adapter->flags2 & FLAG2_IS_DISCARDING) { 1359 e_dbg("Packet Split buffers didn't pick up the full packet\n"); 1360 dev_kfree_skb_irq(skb); 1361 if (staterr & E1000_RXD_STAT_EOP) 1362 adapter->flags2 &= ~FLAG2_IS_DISCARDING; 1363 goto next_desc; 1364 } 1365 1366 if (unlikely((staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK) && 1367 !(netdev->features & NETIF_F_RXALL))) { 1368 dev_kfree_skb_irq(skb); 1369 goto next_desc; 1370 } 1371 1372 length = le16_to_cpu(rx_desc->wb.middle.length0); 1373 1374 if (!length) { 1375 e_dbg("Last part of the packet spanning multiple descriptors\n"); 1376 dev_kfree_skb_irq(skb); 1377 goto next_desc; 1378 } 1379 1380 /* Good Receive */ 1381 skb_put(skb, length); 1382 1383 { 1384 /* this looks ugly, but it seems compiler issues make 1385 * it more efficient than reusing j 1386 */ 1387 int l1 = le16_to_cpu(rx_desc->wb.upper.length[0]); 1388 1389 /* page alloc/put takes too long and effects small 1390 * packet throughput, so unsplit small packets and 1391 * save the alloc/put only valid in softirq (napi) 1392 * context to call kmap_* 1393 */ 1394 if (l1 && (l1 <= copybreak) && 1395 ((length + l1) <= adapter->rx_ps_bsize0)) { 1396 u8 *vaddr; 1397 1398 ps_page = &buffer_info->ps_pages[0]; 1399 1400 /* there is no documentation about how to call 1401 * kmap_atomic, so we can't hold the mapping 1402 * very long 1403 */ 1404 dma_sync_single_for_cpu(&pdev->dev, 1405 ps_page->dma, 1406 PAGE_SIZE, 1407 DMA_FROM_DEVICE); 1408 vaddr = kmap_atomic(ps_page->page); 1409 memcpy(skb_tail_pointer(skb), vaddr, l1); 1410 kunmap_atomic(vaddr); 1411 dma_sync_single_for_device(&pdev->dev, 1412 ps_page->dma, 1413 PAGE_SIZE, 1414 DMA_FROM_DEVICE); 1415 1416 /* remove the CRC */ 1417 if (!(adapter->flags2 & FLAG2_CRC_STRIPPING)) { 1418 if (!(netdev->features & NETIF_F_RXFCS)) 1419 l1 -= 4; 1420 } 1421 1422 skb_put(skb, l1); 1423 goto copydone; 1424 } /* if */ 1425 } 1426 1427 for (j = 0; j < PS_PAGE_BUFFERS; j++) { 1428 length = le16_to_cpu(rx_desc->wb.upper.length[j]); 1429 if (!length) 1430 break; 1431 1432 ps_page = &buffer_info->ps_pages[j]; 1433 dma_unmap_page(&pdev->dev, ps_page->dma, PAGE_SIZE, 1434 DMA_FROM_DEVICE); 1435 ps_page->dma = 0; 1436 skb_fill_page_desc(skb, j, ps_page->page, 0, length); 1437 ps_page->page = NULL; 1438 skb->len += length; 1439 skb->data_len += length; 1440 skb->truesize += PAGE_SIZE; 1441 } 1442 1443 /* strip the ethernet crc, problem is we're using pages now so 1444 * this whole operation can get a little cpu intensive 1445 */ 1446 if (!(adapter->flags2 & FLAG2_CRC_STRIPPING)) { 1447 if (!(netdev->features & NETIF_F_RXFCS)) 1448 pskb_trim(skb, skb->len - 4); 1449 } 1450 1451 copydone: 1452 total_rx_bytes += skb->len; 1453 total_rx_packets++; 1454 1455 e1000_rx_checksum(adapter, staterr, skb); 1456 1457 e1000_rx_hash(netdev, rx_desc->wb.lower.hi_dword.rss, skb); 1458 1459 if (rx_desc->wb.upper.header_status & 1460 cpu_to_le16(E1000_RXDPS_HDRSTAT_HDRSP)) 1461 adapter->rx_hdr_split++; 1462 1463 e1000_receive_skb(adapter, netdev, skb, staterr, 1464 rx_desc->wb.middle.vlan); 1465 1466 next_desc: 1467 rx_desc->wb.middle.status_error &= cpu_to_le32(~0xFF); 1468 buffer_info->skb = NULL; 1469 1470 /* return some buffers to hardware, one at a time is too slow */ 1471 if (cleaned_count >= E1000_RX_BUFFER_WRITE) { 1472 adapter->alloc_rx_buf(rx_ring, cleaned_count, 1473 GFP_ATOMIC); 1474 cleaned_count = 0; 1475 } 1476 1477 /* use prefetched values */ 1478 rx_desc = next_rxd; 1479 buffer_info = next_buffer; 1480 1481 staterr = le32_to_cpu(rx_desc->wb.middle.status_error); 1482 } 1483 rx_ring->next_to_clean = i; 1484 1485 cleaned_count = e1000_desc_unused(rx_ring); 1486 if (cleaned_count) 1487 adapter->alloc_rx_buf(rx_ring, cleaned_count, GFP_ATOMIC); 1488 1489 adapter->total_rx_bytes += total_rx_bytes; 1490 adapter->total_rx_packets += total_rx_packets; 1491 return cleaned; 1492 } 1493 1494 /** 1495 * e1000_consume_page - helper function 1496 **/ 1497 static void e1000_consume_page(struct e1000_buffer *bi, struct sk_buff *skb, 1498 u16 length) 1499 { 1500 bi->page = NULL; 1501 skb->len += length; 1502 skb->data_len += length; 1503 skb->truesize += PAGE_SIZE; 1504 } 1505 1506 /** 1507 * e1000_clean_jumbo_rx_irq - Send received data up the network stack; legacy 1508 * @adapter: board private structure 1509 * 1510 * the return value indicates whether actual cleaning was done, there 1511 * is no guarantee that everything was cleaned 1512 **/ 1513 static bool e1000_clean_jumbo_rx_irq(struct e1000_ring *rx_ring, int *work_done, 1514 int work_to_do) 1515 { 1516 struct e1000_adapter *adapter = rx_ring->adapter; 1517 struct net_device *netdev = adapter->netdev; 1518 struct pci_dev *pdev = adapter->pdev; 1519 union e1000_rx_desc_extended *rx_desc, *next_rxd; 1520 struct e1000_buffer *buffer_info, *next_buffer; 1521 u32 length, staterr; 1522 unsigned int i; 1523 int cleaned_count = 0; 1524 bool cleaned = false; 1525 unsigned int total_rx_bytes = 0, total_rx_packets = 0; 1526 struct skb_shared_info *shinfo; 1527 1528 i = rx_ring->next_to_clean; 1529 rx_desc = E1000_RX_DESC_EXT(*rx_ring, i); 1530 staterr = le32_to_cpu(rx_desc->wb.upper.status_error); 1531 buffer_info = &rx_ring->buffer_info[i]; 1532 1533 while (staterr & E1000_RXD_STAT_DD) { 1534 struct sk_buff *skb; 1535 1536 if (*work_done >= work_to_do) 1537 break; 1538 (*work_done)++; 1539 dma_rmb(); /* read descriptor and rx_buffer_info after status DD */ 1540 1541 skb = buffer_info->skb; 1542 buffer_info->skb = NULL; 1543 1544 ++i; 1545 if (i == rx_ring->count) 1546 i = 0; 1547 next_rxd = E1000_RX_DESC_EXT(*rx_ring, i); 1548 prefetch(next_rxd); 1549 1550 next_buffer = &rx_ring->buffer_info[i]; 1551 1552 cleaned = true; 1553 cleaned_count++; 1554 dma_unmap_page(&pdev->dev, buffer_info->dma, PAGE_SIZE, 1555 DMA_FROM_DEVICE); 1556 buffer_info->dma = 0; 1557 1558 length = le16_to_cpu(rx_desc->wb.upper.length); 1559 1560 /* errors is only valid for DD + EOP descriptors */ 1561 if (unlikely((staterr & E1000_RXD_STAT_EOP) && 1562 ((staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK) && 1563 !(netdev->features & NETIF_F_RXALL)))) { 1564 /* recycle both page and skb */ 1565 buffer_info->skb = skb; 1566 /* an error means any chain goes out the window too */ 1567 if (rx_ring->rx_skb_top) 1568 dev_kfree_skb_irq(rx_ring->rx_skb_top); 1569 rx_ring->rx_skb_top = NULL; 1570 goto next_desc; 1571 } 1572 #define rxtop (rx_ring->rx_skb_top) 1573 if (!(staterr & E1000_RXD_STAT_EOP)) { 1574 /* this descriptor is only the beginning (or middle) */ 1575 if (!rxtop) { 1576 /* this is the beginning of a chain */ 1577 rxtop = skb; 1578 skb_fill_page_desc(rxtop, 0, buffer_info->page, 1579 0, length); 1580 } else { 1581 /* this is the middle of a chain */ 1582 shinfo = skb_shinfo(rxtop); 1583 skb_fill_page_desc(rxtop, shinfo->nr_frags, 1584 buffer_info->page, 0, 1585 length); 1586 /* re-use the skb, only consumed the page */ 1587 buffer_info->skb = skb; 1588 } 1589 e1000_consume_page(buffer_info, rxtop, length); 1590 goto next_desc; 1591 } else { 1592 if (rxtop) { 1593 /* end of the chain */ 1594 shinfo = skb_shinfo(rxtop); 1595 skb_fill_page_desc(rxtop, shinfo->nr_frags, 1596 buffer_info->page, 0, 1597 length); 1598 /* re-use the current skb, we only consumed the 1599 * page 1600 */ 1601 buffer_info->skb = skb; 1602 skb = rxtop; 1603 rxtop = NULL; 1604 e1000_consume_page(buffer_info, skb, length); 1605 } else { 1606 /* no chain, got EOP, this buf is the packet 1607 * copybreak to save the put_page/alloc_page 1608 */ 1609 if (length <= copybreak && 1610 skb_tailroom(skb) >= length) { 1611 u8 *vaddr; 1612 vaddr = kmap_atomic(buffer_info->page); 1613 memcpy(skb_tail_pointer(skb), vaddr, 1614 length); 1615 kunmap_atomic(vaddr); 1616 /* re-use the page, so don't erase 1617 * buffer_info->page 1618 */ 1619 skb_put(skb, length); 1620 } else { 1621 skb_fill_page_desc(skb, 0, 1622 buffer_info->page, 0, 1623 length); 1624 e1000_consume_page(buffer_info, skb, 1625 length); 1626 } 1627 } 1628 } 1629 1630 /* Receive Checksum Offload */ 1631 e1000_rx_checksum(adapter, staterr, skb); 1632 1633 e1000_rx_hash(netdev, rx_desc->wb.lower.hi_dword.rss, skb); 1634 1635 /* probably a little skewed due to removing CRC */ 1636 total_rx_bytes += skb->len; 1637 total_rx_packets++; 1638 1639 /* eth type trans needs skb->data to point to something */ 1640 if (!pskb_may_pull(skb, ETH_HLEN)) { 1641 e_err("pskb_may_pull failed.\n"); 1642 dev_kfree_skb_irq(skb); 1643 goto next_desc; 1644 } 1645 1646 e1000_receive_skb(adapter, netdev, skb, staterr, 1647 rx_desc->wb.upper.vlan); 1648 1649 next_desc: 1650 rx_desc->wb.upper.status_error &= cpu_to_le32(~0xFF); 1651 1652 /* return some buffers to hardware, one at a time is too slow */ 1653 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) { 1654 adapter->alloc_rx_buf(rx_ring, cleaned_count, 1655 GFP_ATOMIC); 1656 cleaned_count = 0; 1657 } 1658 1659 /* use prefetched values */ 1660 rx_desc = next_rxd; 1661 buffer_info = next_buffer; 1662 1663 staterr = le32_to_cpu(rx_desc->wb.upper.status_error); 1664 } 1665 rx_ring->next_to_clean = i; 1666 1667 cleaned_count = e1000_desc_unused(rx_ring); 1668 if (cleaned_count) 1669 adapter->alloc_rx_buf(rx_ring, cleaned_count, GFP_ATOMIC); 1670 1671 adapter->total_rx_bytes += total_rx_bytes; 1672 adapter->total_rx_packets += total_rx_packets; 1673 return cleaned; 1674 } 1675 1676 /** 1677 * e1000_clean_rx_ring - Free Rx Buffers per Queue 1678 * @rx_ring: Rx descriptor ring 1679 **/ 1680 static void e1000_clean_rx_ring(struct e1000_ring *rx_ring) 1681 { 1682 struct e1000_adapter *adapter = rx_ring->adapter; 1683 struct e1000_buffer *buffer_info; 1684 struct e1000_ps_page *ps_page; 1685 struct pci_dev *pdev = adapter->pdev; 1686 unsigned int i, j; 1687 1688 /* Free all the Rx ring sk_buffs */ 1689 for (i = 0; i < rx_ring->count; i++) { 1690 buffer_info = &rx_ring->buffer_info[i]; 1691 if (buffer_info->dma) { 1692 if (adapter->clean_rx == e1000_clean_rx_irq) 1693 dma_unmap_single(&pdev->dev, buffer_info->dma, 1694 adapter->rx_buffer_len, 1695 DMA_FROM_DEVICE); 1696 else if (adapter->clean_rx == e1000_clean_jumbo_rx_irq) 1697 dma_unmap_page(&pdev->dev, buffer_info->dma, 1698 PAGE_SIZE, DMA_FROM_DEVICE); 1699 else if (adapter->clean_rx == e1000_clean_rx_irq_ps) 1700 dma_unmap_single(&pdev->dev, buffer_info->dma, 1701 adapter->rx_ps_bsize0, 1702 DMA_FROM_DEVICE); 1703 buffer_info->dma = 0; 1704 } 1705 1706 if (buffer_info->page) { 1707 put_page(buffer_info->page); 1708 buffer_info->page = NULL; 1709 } 1710 1711 if (buffer_info->skb) { 1712 dev_kfree_skb(buffer_info->skb); 1713 buffer_info->skb = NULL; 1714 } 1715 1716 for (j = 0; j < PS_PAGE_BUFFERS; j++) { 1717 ps_page = &buffer_info->ps_pages[j]; 1718 if (!ps_page->page) 1719 break; 1720 dma_unmap_page(&pdev->dev, ps_page->dma, PAGE_SIZE, 1721 DMA_FROM_DEVICE); 1722 ps_page->dma = 0; 1723 put_page(ps_page->page); 1724 ps_page->page = NULL; 1725 } 1726 } 1727 1728 /* there also may be some cached data from a chained receive */ 1729 if (rx_ring->rx_skb_top) { 1730 dev_kfree_skb(rx_ring->rx_skb_top); 1731 rx_ring->rx_skb_top = NULL; 1732 } 1733 1734 /* Zero out the descriptor ring */ 1735 memset(rx_ring->desc, 0, rx_ring->size); 1736 1737 rx_ring->next_to_clean = 0; 1738 rx_ring->next_to_use = 0; 1739 adapter->flags2 &= ~FLAG2_IS_DISCARDING; 1740 } 1741 1742 static void e1000e_downshift_workaround(struct work_struct *work) 1743 { 1744 struct e1000_adapter *adapter = container_of(work, 1745 struct e1000_adapter, 1746 downshift_task); 1747 1748 if (test_bit(__E1000_DOWN, &adapter->state)) 1749 return; 1750 1751 e1000e_gig_downshift_workaround_ich8lan(&adapter->hw); 1752 } 1753 1754 /** 1755 * e1000_intr_msi - Interrupt Handler 1756 * @irq: interrupt number 1757 * @data: pointer to a network interface device structure 1758 **/ 1759 static irqreturn_t e1000_intr_msi(int __always_unused irq, void *data) 1760 { 1761 struct net_device *netdev = data; 1762 struct e1000_adapter *adapter = netdev_priv(netdev); 1763 struct e1000_hw *hw = &adapter->hw; 1764 u32 icr = er32(ICR); 1765 1766 /* read ICR disables interrupts using IAM */ 1767 if (icr & E1000_ICR_LSC) { 1768 hw->mac.get_link_status = true; 1769 /* ICH8 workaround-- Call gig speed drop workaround on cable 1770 * disconnect (LSC) before accessing any PHY registers 1771 */ 1772 if ((adapter->flags & FLAG_LSC_GIG_SPEED_DROP) && 1773 (!(er32(STATUS) & E1000_STATUS_LU))) 1774 schedule_work(&adapter->downshift_task); 1775 1776 /* 80003ES2LAN workaround-- For packet buffer work-around on 1777 * link down event; disable receives here in the ISR and reset 1778 * adapter in watchdog 1779 */ 1780 if (netif_carrier_ok(netdev) && 1781 adapter->flags & FLAG_RX_NEEDS_RESTART) { 1782 /* disable receives */ 1783 u32 rctl = er32(RCTL); 1784 1785 ew32(RCTL, rctl & ~E1000_RCTL_EN); 1786 adapter->flags |= FLAG_RESTART_NOW; 1787 } 1788 /* guard against interrupt when we're going down */ 1789 if (!test_bit(__E1000_DOWN, &adapter->state)) 1790 mod_timer(&adapter->watchdog_timer, jiffies + 1); 1791 } 1792 1793 /* Reset on uncorrectable ECC error */ 1794 if ((icr & E1000_ICR_ECCER) && ((hw->mac.type == e1000_pch_lpt) || 1795 (hw->mac.type == e1000_pch_spt))) { 1796 u32 pbeccsts = er32(PBECCSTS); 1797 1798 adapter->corr_errors += 1799 pbeccsts & E1000_PBECCSTS_CORR_ERR_CNT_MASK; 1800 adapter->uncorr_errors += 1801 (pbeccsts & E1000_PBECCSTS_UNCORR_ERR_CNT_MASK) >> 1802 E1000_PBECCSTS_UNCORR_ERR_CNT_SHIFT; 1803 1804 /* Do the reset outside of interrupt context */ 1805 schedule_work(&adapter->reset_task); 1806 1807 /* return immediately since reset is imminent */ 1808 return IRQ_HANDLED; 1809 } 1810 1811 if (napi_schedule_prep(&adapter->napi)) { 1812 adapter->total_tx_bytes = 0; 1813 adapter->total_tx_packets = 0; 1814 adapter->total_rx_bytes = 0; 1815 adapter->total_rx_packets = 0; 1816 __napi_schedule(&adapter->napi); 1817 } 1818 1819 return IRQ_HANDLED; 1820 } 1821 1822 /** 1823 * e1000_intr - Interrupt Handler 1824 * @irq: interrupt number 1825 * @data: pointer to a network interface device structure 1826 **/ 1827 static irqreturn_t e1000_intr(int __always_unused irq, void *data) 1828 { 1829 struct net_device *netdev = data; 1830 struct e1000_adapter *adapter = netdev_priv(netdev); 1831 struct e1000_hw *hw = &adapter->hw; 1832 u32 rctl, icr = er32(ICR); 1833 1834 if (!icr || test_bit(__E1000_DOWN, &adapter->state)) 1835 return IRQ_NONE; /* Not our interrupt */ 1836 1837 /* IMS will not auto-mask if INT_ASSERTED is not set, and if it is 1838 * not set, then the adapter didn't send an interrupt 1839 */ 1840 if (!(icr & E1000_ICR_INT_ASSERTED)) 1841 return IRQ_NONE; 1842 1843 /* Interrupt Auto-Mask...upon reading ICR, 1844 * interrupts are masked. No need for the 1845 * IMC write 1846 */ 1847 1848 if (icr & E1000_ICR_LSC) { 1849 hw->mac.get_link_status = true; 1850 /* ICH8 workaround-- Call gig speed drop workaround on cable 1851 * disconnect (LSC) before accessing any PHY registers 1852 */ 1853 if ((adapter->flags & FLAG_LSC_GIG_SPEED_DROP) && 1854 (!(er32(STATUS) & E1000_STATUS_LU))) 1855 schedule_work(&adapter->downshift_task); 1856 1857 /* 80003ES2LAN workaround-- 1858 * For packet buffer work-around on link down event; 1859 * disable receives here in the ISR and 1860 * reset adapter in watchdog 1861 */ 1862 if (netif_carrier_ok(netdev) && 1863 (adapter->flags & FLAG_RX_NEEDS_RESTART)) { 1864 /* disable receives */ 1865 rctl = er32(RCTL); 1866 ew32(RCTL, rctl & ~E1000_RCTL_EN); 1867 adapter->flags |= FLAG_RESTART_NOW; 1868 } 1869 /* guard against interrupt when we're going down */ 1870 if (!test_bit(__E1000_DOWN, &adapter->state)) 1871 mod_timer(&adapter->watchdog_timer, jiffies + 1); 1872 } 1873 1874 /* Reset on uncorrectable ECC error */ 1875 if ((icr & E1000_ICR_ECCER) && ((hw->mac.type == e1000_pch_lpt) || 1876 (hw->mac.type == e1000_pch_spt))) { 1877 u32 pbeccsts = er32(PBECCSTS); 1878 1879 adapter->corr_errors += 1880 pbeccsts & E1000_PBECCSTS_CORR_ERR_CNT_MASK; 1881 adapter->uncorr_errors += 1882 (pbeccsts & E1000_PBECCSTS_UNCORR_ERR_CNT_MASK) >> 1883 E1000_PBECCSTS_UNCORR_ERR_CNT_SHIFT; 1884 1885 /* Do the reset outside of interrupt context */ 1886 schedule_work(&adapter->reset_task); 1887 1888 /* return immediately since reset is imminent */ 1889 return IRQ_HANDLED; 1890 } 1891 1892 if (napi_schedule_prep(&adapter->napi)) { 1893 adapter->total_tx_bytes = 0; 1894 adapter->total_tx_packets = 0; 1895 adapter->total_rx_bytes = 0; 1896 adapter->total_rx_packets = 0; 1897 __napi_schedule(&adapter->napi); 1898 } 1899 1900 return IRQ_HANDLED; 1901 } 1902 1903 static irqreturn_t e1000_msix_other(int __always_unused irq, void *data) 1904 { 1905 struct net_device *netdev = data; 1906 struct e1000_adapter *adapter = netdev_priv(netdev); 1907 struct e1000_hw *hw = &adapter->hw; 1908 1909 hw->mac.get_link_status = true; 1910 1911 /* guard against interrupt when we're going down */ 1912 if (!test_bit(__E1000_DOWN, &adapter->state)) { 1913 mod_timer(&adapter->watchdog_timer, jiffies + 1); 1914 ew32(IMS, E1000_IMS_OTHER); 1915 } 1916 1917 return IRQ_HANDLED; 1918 } 1919 1920 static irqreturn_t e1000_intr_msix_tx(int __always_unused irq, void *data) 1921 { 1922 struct net_device *netdev = data; 1923 struct e1000_adapter *adapter = netdev_priv(netdev); 1924 struct e1000_hw *hw = &adapter->hw; 1925 struct e1000_ring *tx_ring = adapter->tx_ring; 1926 1927 adapter->total_tx_bytes = 0; 1928 adapter->total_tx_packets = 0; 1929 1930 if (!e1000_clean_tx_irq(tx_ring)) 1931 /* Ring was not completely cleaned, so fire another interrupt */ 1932 ew32(ICS, tx_ring->ims_val); 1933 1934 if (!test_bit(__E1000_DOWN, &adapter->state)) 1935 ew32(IMS, adapter->tx_ring->ims_val); 1936 1937 return IRQ_HANDLED; 1938 } 1939 1940 static irqreturn_t e1000_intr_msix_rx(int __always_unused irq, void *data) 1941 { 1942 struct net_device *netdev = data; 1943 struct e1000_adapter *adapter = netdev_priv(netdev); 1944 struct e1000_ring *rx_ring = adapter->rx_ring; 1945 1946 /* Write the ITR value calculated at the end of the 1947 * previous interrupt. 1948 */ 1949 if (rx_ring->set_itr) { 1950 u32 itr = rx_ring->itr_val ? 1951 1000000000 / (rx_ring->itr_val * 256) : 0; 1952 1953 writel(itr, rx_ring->itr_register); 1954 rx_ring->set_itr = 0; 1955 } 1956 1957 if (napi_schedule_prep(&adapter->napi)) { 1958 adapter->total_rx_bytes = 0; 1959 adapter->total_rx_packets = 0; 1960 __napi_schedule(&adapter->napi); 1961 } 1962 return IRQ_HANDLED; 1963 } 1964 1965 /** 1966 * e1000_configure_msix - Configure MSI-X hardware 1967 * 1968 * e1000_configure_msix sets up the hardware to properly 1969 * generate MSI-X interrupts. 1970 **/ 1971 static void e1000_configure_msix(struct e1000_adapter *adapter) 1972 { 1973 struct e1000_hw *hw = &adapter->hw; 1974 struct e1000_ring *rx_ring = adapter->rx_ring; 1975 struct e1000_ring *tx_ring = adapter->tx_ring; 1976 int vector = 0; 1977 u32 ctrl_ext, ivar = 0; 1978 1979 adapter->eiac_mask = 0; 1980 1981 /* Workaround issue with spurious interrupts on 82574 in MSI-X mode */ 1982 if (hw->mac.type == e1000_82574) { 1983 u32 rfctl = er32(RFCTL); 1984 1985 rfctl |= E1000_RFCTL_ACK_DIS; 1986 ew32(RFCTL, rfctl); 1987 } 1988 1989 /* Configure Rx vector */ 1990 rx_ring->ims_val = E1000_IMS_RXQ0; 1991 adapter->eiac_mask |= rx_ring->ims_val; 1992 if (rx_ring->itr_val) 1993 writel(1000000000 / (rx_ring->itr_val * 256), 1994 rx_ring->itr_register); 1995 else 1996 writel(1, rx_ring->itr_register); 1997 ivar = E1000_IVAR_INT_ALLOC_VALID | vector; 1998 1999 /* Configure Tx vector */ 2000 tx_ring->ims_val = E1000_IMS_TXQ0; 2001 vector++; 2002 if (tx_ring->itr_val) 2003 writel(1000000000 / (tx_ring->itr_val * 256), 2004 tx_ring->itr_register); 2005 else 2006 writel(1, tx_ring->itr_register); 2007 adapter->eiac_mask |= tx_ring->ims_val; 2008 ivar |= ((E1000_IVAR_INT_ALLOC_VALID | vector) << 8); 2009 2010 /* set vector for Other Causes, e.g. link changes */ 2011 vector++; 2012 ivar |= ((E1000_IVAR_INT_ALLOC_VALID | vector) << 16); 2013 if (rx_ring->itr_val) 2014 writel(1000000000 / (rx_ring->itr_val * 256), 2015 hw->hw_addr + E1000_EITR_82574(vector)); 2016 else 2017 writel(1, hw->hw_addr + E1000_EITR_82574(vector)); 2018 adapter->eiac_mask |= E1000_IMS_OTHER; 2019 2020 /* Cause Tx interrupts on every write back */ 2021 ivar |= BIT(31); 2022 2023 ew32(IVAR, ivar); 2024 2025 /* enable MSI-X PBA support */ 2026 ctrl_ext = er32(CTRL_EXT) & ~E1000_CTRL_EXT_IAME; 2027 ctrl_ext |= E1000_CTRL_EXT_PBA_CLR | E1000_CTRL_EXT_EIAME; 2028 ew32(CTRL_EXT, ctrl_ext); 2029 e1e_flush(); 2030 } 2031 2032 void e1000e_reset_interrupt_capability(struct e1000_adapter *adapter) 2033 { 2034 if (adapter->msix_entries) { 2035 pci_disable_msix(adapter->pdev); 2036 kfree(adapter->msix_entries); 2037 adapter->msix_entries = NULL; 2038 } else if (adapter->flags & FLAG_MSI_ENABLED) { 2039 pci_disable_msi(adapter->pdev); 2040 adapter->flags &= ~FLAG_MSI_ENABLED; 2041 } 2042 } 2043 2044 /** 2045 * e1000e_set_interrupt_capability - set MSI or MSI-X if supported 2046 * 2047 * Attempt to configure interrupts using the best available 2048 * capabilities of the hardware and kernel. 2049 **/ 2050 void e1000e_set_interrupt_capability(struct e1000_adapter *adapter) 2051 { 2052 int err; 2053 int i; 2054 2055 switch (adapter->int_mode) { 2056 case E1000E_INT_MODE_MSIX: 2057 if (adapter->flags & FLAG_HAS_MSIX) { 2058 adapter->num_vectors = 3; /* RxQ0, TxQ0 and other */ 2059 adapter->msix_entries = kcalloc(adapter->num_vectors, 2060 sizeof(struct 2061 msix_entry), 2062 GFP_KERNEL); 2063 if (adapter->msix_entries) { 2064 struct e1000_adapter *a = adapter; 2065 2066 for (i = 0; i < adapter->num_vectors; i++) 2067 adapter->msix_entries[i].entry = i; 2068 2069 err = pci_enable_msix_range(a->pdev, 2070 a->msix_entries, 2071 a->num_vectors, 2072 a->num_vectors); 2073 if (err > 0) 2074 return; 2075 } 2076 /* MSI-X failed, so fall through and try MSI */ 2077 e_err("Failed to initialize MSI-X interrupts. Falling back to MSI interrupts.\n"); 2078 e1000e_reset_interrupt_capability(adapter); 2079 } 2080 adapter->int_mode = E1000E_INT_MODE_MSI; 2081 /* Fall through */ 2082 case E1000E_INT_MODE_MSI: 2083 if (!pci_enable_msi(adapter->pdev)) { 2084 adapter->flags |= FLAG_MSI_ENABLED; 2085 } else { 2086 adapter->int_mode = E1000E_INT_MODE_LEGACY; 2087 e_err("Failed to initialize MSI interrupts. Falling back to legacy interrupts.\n"); 2088 } 2089 /* Fall through */ 2090 case E1000E_INT_MODE_LEGACY: 2091 /* Don't do anything; this is the system default */ 2092 break; 2093 } 2094 2095 /* store the number of vectors being used */ 2096 adapter->num_vectors = 1; 2097 } 2098 2099 /** 2100 * e1000_request_msix - Initialize MSI-X interrupts 2101 * 2102 * e1000_request_msix allocates MSI-X vectors and requests interrupts from the 2103 * kernel. 2104 **/ 2105 static int e1000_request_msix(struct e1000_adapter *adapter) 2106 { 2107 struct net_device *netdev = adapter->netdev; 2108 int err = 0, vector = 0; 2109 2110 if (strlen(netdev->name) < (IFNAMSIZ - 5)) 2111 snprintf(adapter->rx_ring->name, 2112 sizeof(adapter->rx_ring->name) - 1, 2113 "%s-rx-0", netdev->name); 2114 else 2115 memcpy(adapter->rx_ring->name, netdev->name, IFNAMSIZ); 2116 err = request_irq(adapter->msix_entries[vector].vector, 2117 e1000_intr_msix_rx, 0, adapter->rx_ring->name, 2118 netdev); 2119 if (err) 2120 return err; 2121 adapter->rx_ring->itr_register = adapter->hw.hw_addr + 2122 E1000_EITR_82574(vector); 2123 adapter->rx_ring->itr_val = adapter->itr; 2124 vector++; 2125 2126 if (strlen(netdev->name) < (IFNAMSIZ - 5)) 2127 snprintf(adapter->tx_ring->name, 2128 sizeof(adapter->tx_ring->name) - 1, 2129 "%s-tx-0", netdev->name); 2130 else 2131 memcpy(adapter->tx_ring->name, netdev->name, IFNAMSIZ); 2132 err = request_irq(adapter->msix_entries[vector].vector, 2133 e1000_intr_msix_tx, 0, adapter->tx_ring->name, 2134 netdev); 2135 if (err) 2136 return err; 2137 adapter->tx_ring->itr_register = adapter->hw.hw_addr + 2138 E1000_EITR_82574(vector); 2139 adapter->tx_ring->itr_val = adapter->itr; 2140 vector++; 2141 2142 err = request_irq(adapter->msix_entries[vector].vector, 2143 e1000_msix_other, 0, netdev->name, netdev); 2144 if (err) 2145 return err; 2146 2147 e1000_configure_msix(adapter); 2148 2149 return 0; 2150 } 2151 2152 /** 2153 * e1000_request_irq - initialize interrupts 2154 * 2155 * Attempts to configure interrupts using the best available 2156 * capabilities of the hardware and kernel. 2157 **/ 2158 static int e1000_request_irq(struct e1000_adapter *adapter) 2159 { 2160 struct net_device *netdev = adapter->netdev; 2161 int err; 2162 2163 if (adapter->msix_entries) { 2164 err = e1000_request_msix(adapter); 2165 if (!err) 2166 return err; 2167 /* fall back to MSI */ 2168 e1000e_reset_interrupt_capability(adapter); 2169 adapter->int_mode = E1000E_INT_MODE_MSI; 2170 e1000e_set_interrupt_capability(adapter); 2171 } 2172 if (adapter->flags & FLAG_MSI_ENABLED) { 2173 err = request_irq(adapter->pdev->irq, e1000_intr_msi, 0, 2174 netdev->name, netdev); 2175 if (!err) 2176 return err; 2177 2178 /* fall back to legacy interrupt */ 2179 e1000e_reset_interrupt_capability(adapter); 2180 adapter->int_mode = E1000E_INT_MODE_LEGACY; 2181 } 2182 2183 err = request_irq(adapter->pdev->irq, e1000_intr, IRQF_SHARED, 2184 netdev->name, netdev); 2185 if (err) 2186 e_err("Unable to allocate interrupt, Error: %d\n", err); 2187 2188 return err; 2189 } 2190 2191 static void e1000_free_irq(struct e1000_adapter *adapter) 2192 { 2193 struct net_device *netdev = adapter->netdev; 2194 2195 if (adapter->msix_entries) { 2196 int vector = 0; 2197 2198 free_irq(adapter->msix_entries[vector].vector, netdev); 2199 vector++; 2200 2201 free_irq(adapter->msix_entries[vector].vector, netdev); 2202 vector++; 2203 2204 /* Other Causes interrupt vector */ 2205 free_irq(adapter->msix_entries[vector].vector, netdev); 2206 return; 2207 } 2208 2209 free_irq(adapter->pdev->irq, netdev); 2210 } 2211 2212 /** 2213 * e1000_irq_disable - Mask off interrupt generation on the NIC 2214 **/ 2215 static void e1000_irq_disable(struct e1000_adapter *adapter) 2216 { 2217 struct e1000_hw *hw = &adapter->hw; 2218 2219 ew32(IMC, ~0); 2220 if (adapter->msix_entries) 2221 ew32(EIAC_82574, 0); 2222 e1e_flush(); 2223 2224 if (adapter->msix_entries) { 2225 int i; 2226 2227 for (i = 0; i < adapter->num_vectors; i++) 2228 synchronize_irq(adapter->msix_entries[i].vector); 2229 } else { 2230 synchronize_irq(adapter->pdev->irq); 2231 } 2232 } 2233 2234 /** 2235 * e1000_irq_enable - Enable default interrupt generation settings 2236 **/ 2237 static void e1000_irq_enable(struct e1000_adapter *adapter) 2238 { 2239 struct e1000_hw *hw = &adapter->hw; 2240 2241 if (adapter->msix_entries) { 2242 ew32(EIAC_82574, adapter->eiac_mask & E1000_EIAC_MASK_82574); 2243 ew32(IMS, adapter->eiac_mask | E1000_IMS_LSC); 2244 } else if ((hw->mac.type == e1000_pch_lpt) || 2245 (hw->mac.type == e1000_pch_spt)) { 2246 ew32(IMS, IMS_ENABLE_MASK | E1000_IMS_ECCER); 2247 } else { 2248 ew32(IMS, IMS_ENABLE_MASK); 2249 } 2250 e1e_flush(); 2251 } 2252 2253 /** 2254 * e1000e_get_hw_control - get control of the h/w from f/w 2255 * @adapter: address of board private structure 2256 * 2257 * e1000e_get_hw_control sets {CTRL_EXT|SWSM}:DRV_LOAD bit. 2258 * For ASF and Pass Through versions of f/w this means that 2259 * the driver is loaded. For AMT version (only with 82573) 2260 * of the f/w this means that the network i/f is open. 2261 **/ 2262 void e1000e_get_hw_control(struct e1000_adapter *adapter) 2263 { 2264 struct e1000_hw *hw = &adapter->hw; 2265 u32 ctrl_ext; 2266 u32 swsm; 2267 2268 /* Let firmware know the driver has taken over */ 2269 if (adapter->flags & FLAG_HAS_SWSM_ON_LOAD) { 2270 swsm = er32(SWSM); 2271 ew32(SWSM, swsm | E1000_SWSM_DRV_LOAD); 2272 } else if (adapter->flags & FLAG_HAS_CTRLEXT_ON_LOAD) { 2273 ctrl_ext = er32(CTRL_EXT); 2274 ew32(CTRL_EXT, ctrl_ext | E1000_CTRL_EXT_DRV_LOAD); 2275 } 2276 } 2277 2278 /** 2279 * e1000e_release_hw_control - release control of the h/w to f/w 2280 * @adapter: address of board private structure 2281 * 2282 * e1000e_release_hw_control resets {CTRL_EXT|SWSM}:DRV_LOAD bit. 2283 * For ASF and Pass Through versions of f/w this means that the 2284 * driver is no longer loaded. For AMT version (only with 82573) i 2285 * of the f/w this means that the network i/f is closed. 2286 * 2287 **/ 2288 void e1000e_release_hw_control(struct e1000_adapter *adapter) 2289 { 2290 struct e1000_hw *hw = &adapter->hw; 2291 u32 ctrl_ext; 2292 u32 swsm; 2293 2294 /* Let firmware taken over control of h/w */ 2295 if (adapter->flags & FLAG_HAS_SWSM_ON_LOAD) { 2296 swsm = er32(SWSM); 2297 ew32(SWSM, swsm & ~E1000_SWSM_DRV_LOAD); 2298 } else if (adapter->flags & FLAG_HAS_CTRLEXT_ON_LOAD) { 2299 ctrl_ext = er32(CTRL_EXT); 2300 ew32(CTRL_EXT, ctrl_ext & ~E1000_CTRL_EXT_DRV_LOAD); 2301 } 2302 } 2303 2304 /** 2305 * e1000_alloc_ring_dma - allocate memory for a ring structure 2306 **/ 2307 static int e1000_alloc_ring_dma(struct e1000_adapter *adapter, 2308 struct e1000_ring *ring) 2309 { 2310 struct pci_dev *pdev = adapter->pdev; 2311 2312 ring->desc = dma_alloc_coherent(&pdev->dev, ring->size, &ring->dma, 2313 GFP_KERNEL); 2314 if (!ring->desc) 2315 return -ENOMEM; 2316 2317 return 0; 2318 } 2319 2320 /** 2321 * e1000e_setup_tx_resources - allocate Tx resources (Descriptors) 2322 * @tx_ring: Tx descriptor ring 2323 * 2324 * Return 0 on success, negative on failure 2325 **/ 2326 int e1000e_setup_tx_resources(struct e1000_ring *tx_ring) 2327 { 2328 struct e1000_adapter *adapter = tx_ring->adapter; 2329 int err = -ENOMEM, size; 2330 2331 size = sizeof(struct e1000_buffer) * tx_ring->count; 2332 tx_ring->buffer_info = vzalloc(size); 2333 if (!tx_ring->buffer_info) 2334 goto err; 2335 2336 /* round up to nearest 4K */ 2337 tx_ring->size = tx_ring->count * sizeof(struct e1000_tx_desc); 2338 tx_ring->size = ALIGN(tx_ring->size, 4096); 2339 2340 err = e1000_alloc_ring_dma(adapter, tx_ring); 2341 if (err) 2342 goto err; 2343 2344 tx_ring->next_to_use = 0; 2345 tx_ring->next_to_clean = 0; 2346 2347 return 0; 2348 err: 2349 vfree(tx_ring->buffer_info); 2350 e_err("Unable to allocate memory for the transmit descriptor ring\n"); 2351 return err; 2352 } 2353 2354 /** 2355 * e1000e_setup_rx_resources - allocate Rx resources (Descriptors) 2356 * @rx_ring: Rx descriptor ring 2357 * 2358 * Returns 0 on success, negative on failure 2359 **/ 2360 int e1000e_setup_rx_resources(struct e1000_ring *rx_ring) 2361 { 2362 struct e1000_adapter *adapter = rx_ring->adapter; 2363 struct e1000_buffer *buffer_info; 2364 int i, size, desc_len, err = -ENOMEM; 2365 2366 size = sizeof(struct e1000_buffer) * rx_ring->count; 2367 rx_ring->buffer_info = vzalloc(size); 2368 if (!rx_ring->buffer_info) 2369 goto err; 2370 2371 for (i = 0; i < rx_ring->count; i++) { 2372 buffer_info = &rx_ring->buffer_info[i]; 2373 buffer_info->ps_pages = kcalloc(PS_PAGE_BUFFERS, 2374 sizeof(struct e1000_ps_page), 2375 GFP_KERNEL); 2376 if (!buffer_info->ps_pages) 2377 goto err_pages; 2378 } 2379 2380 desc_len = sizeof(union e1000_rx_desc_packet_split); 2381 2382 /* Round up to nearest 4K */ 2383 rx_ring->size = rx_ring->count * desc_len; 2384 rx_ring->size = ALIGN(rx_ring->size, 4096); 2385 2386 err = e1000_alloc_ring_dma(adapter, rx_ring); 2387 if (err) 2388 goto err_pages; 2389 2390 rx_ring->next_to_clean = 0; 2391 rx_ring->next_to_use = 0; 2392 rx_ring->rx_skb_top = NULL; 2393 2394 return 0; 2395 2396 err_pages: 2397 for (i = 0; i < rx_ring->count; i++) { 2398 buffer_info = &rx_ring->buffer_info[i]; 2399 kfree(buffer_info->ps_pages); 2400 } 2401 err: 2402 vfree(rx_ring->buffer_info); 2403 e_err("Unable to allocate memory for the receive descriptor ring\n"); 2404 return err; 2405 } 2406 2407 /** 2408 * e1000_clean_tx_ring - Free Tx Buffers 2409 * @tx_ring: Tx descriptor ring 2410 **/ 2411 static void e1000_clean_tx_ring(struct e1000_ring *tx_ring) 2412 { 2413 struct e1000_adapter *adapter = tx_ring->adapter; 2414 struct e1000_buffer *buffer_info; 2415 unsigned long size; 2416 unsigned int i; 2417 2418 for (i = 0; i < tx_ring->count; i++) { 2419 buffer_info = &tx_ring->buffer_info[i]; 2420 e1000_put_txbuf(tx_ring, buffer_info); 2421 } 2422 2423 netdev_reset_queue(adapter->netdev); 2424 size = sizeof(struct e1000_buffer) * tx_ring->count; 2425 memset(tx_ring->buffer_info, 0, size); 2426 2427 memset(tx_ring->desc, 0, tx_ring->size); 2428 2429 tx_ring->next_to_use = 0; 2430 tx_ring->next_to_clean = 0; 2431 } 2432 2433 /** 2434 * e1000e_free_tx_resources - Free Tx Resources per Queue 2435 * @tx_ring: Tx descriptor ring 2436 * 2437 * Free all transmit software resources 2438 **/ 2439 void e1000e_free_tx_resources(struct e1000_ring *tx_ring) 2440 { 2441 struct e1000_adapter *adapter = tx_ring->adapter; 2442 struct pci_dev *pdev = adapter->pdev; 2443 2444 e1000_clean_tx_ring(tx_ring); 2445 2446 vfree(tx_ring->buffer_info); 2447 tx_ring->buffer_info = NULL; 2448 2449 dma_free_coherent(&pdev->dev, tx_ring->size, tx_ring->desc, 2450 tx_ring->dma); 2451 tx_ring->desc = NULL; 2452 } 2453 2454 /** 2455 * e1000e_free_rx_resources - Free Rx Resources 2456 * @rx_ring: Rx descriptor ring 2457 * 2458 * Free all receive software resources 2459 **/ 2460 void e1000e_free_rx_resources(struct e1000_ring *rx_ring) 2461 { 2462 struct e1000_adapter *adapter = rx_ring->adapter; 2463 struct pci_dev *pdev = adapter->pdev; 2464 int i; 2465 2466 e1000_clean_rx_ring(rx_ring); 2467 2468 for (i = 0; i < rx_ring->count; i++) 2469 kfree(rx_ring->buffer_info[i].ps_pages); 2470 2471 vfree(rx_ring->buffer_info); 2472 rx_ring->buffer_info = NULL; 2473 2474 dma_free_coherent(&pdev->dev, rx_ring->size, rx_ring->desc, 2475 rx_ring->dma); 2476 rx_ring->desc = NULL; 2477 } 2478 2479 /** 2480 * e1000_update_itr - update the dynamic ITR value based on statistics 2481 * @adapter: pointer to adapter 2482 * @itr_setting: current adapter->itr 2483 * @packets: the number of packets during this measurement interval 2484 * @bytes: the number of bytes during this measurement interval 2485 * 2486 * Stores a new ITR value based on packets and byte 2487 * counts during the last interrupt. The advantage of per interrupt 2488 * computation is faster updates and more accurate ITR for the current 2489 * traffic pattern. Constants in this function were computed 2490 * based on theoretical maximum wire speed and thresholds were set based 2491 * on testing data as well as attempting to minimize response time 2492 * while increasing bulk throughput. This functionality is controlled 2493 * by the InterruptThrottleRate module parameter. 2494 **/ 2495 static unsigned int e1000_update_itr(u16 itr_setting, int packets, int bytes) 2496 { 2497 unsigned int retval = itr_setting; 2498 2499 if (packets == 0) 2500 return itr_setting; 2501 2502 switch (itr_setting) { 2503 case lowest_latency: 2504 /* handle TSO and jumbo frames */ 2505 if (bytes / packets > 8000) 2506 retval = bulk_latency; 2507 else if ((packets < 5) && (bytes > 512)) 2508 retval = low_latency; 2509 break; 2510 case low_latency: /* 50 usec aka 20000 ints/s */ 2511 if (bytes > 10000) { 2512 /* this if handles the TSO accounting */ 2513 if (bytes / packets > 8000) 2514 retval = bulk_latency; 2515 else if ((packets < 10) || ((bytes / packets) > 1200)) 2516 retval = bulk_latency; 2517 else if ((packets > 35)) 2518 retval = lowest_latency; 2519 } else if (bytes / packets > 2000) { 2520 retval = bulk_latency; 2521 } else if (packets <= 2 && bytes < 512) { 2522 retval = lowest_latency; 2523 } 2524 break; 2525 case bulk_latency: /* 250 usec aka 4000 ints/s */ 2526 if (bytes > 25000) { 2527 if (packets > 35) 2528 retval = low_latency; 2529 } else if (bytes < 6000) { 2530 retval = low_latency; 2531 } 2532 break; 2533 } 2534 2535 return retval; 2536 } 2537 2538 static void e1000_set_itr(struct e1000_adapter *adapter) 2539 { 2540 u16 current_itr; 2541 u32 new_itr = adapter->itr; 2542 2543 /* for non-gigabit speeds, just fix the interrupt rate at 4000 */ 2544 if (adapter->link_speed != SPEED_1000) { 2545 current_itr = 0; 2546 new_itr = 4000; 2547 goto set_itr_now; 2548 } 2549 2550 if (adapter->flags2 & FLAG2_DISABLE_AIM) { 2551 new_itr = 0; 2552 goto set_itr_now; 2553 } 2554 2555 adapter->tx_itr = e1000_update_itr(adapter->tx_itr, 2556 adapter->total_tx_packets, 2557 adapter->total_tx_bytes); 2558 /* conservative mode (itr 3) eliminates the lowest_latency setting */ 2559 if (adapter->itr_setting == 3 && adapter->tx_itr == lowest_latency) 2560 adapter->tx_itr = low_latency; 2561 2562 adapter->rx_itr = e1000_update_itr(adapter->rx_itr, 2563 adapter->total_rx_packets, 2564 adapter->total_rx_bytes); 2565 /* conservative mode (itr 3) eliminates the lowest_latency setting */ 2566 if (adapter->itr_setting == 3 && adapter->rx_itr == lowest_latency) 2567 adapter->rx_itr = low_latency; 2568 2569 current_itr = max(adapter->rx_itr, adapter->tx_itr); 2570 2571 /* counts and packets in update_itr are dependent on these numbers */ 2572 switch (current_itr) { 2573 case lowest_latency: 2574 new_itr = 70000; 2575 break; 2576 case low_latency: 2577 new_itr = 20000; /* aka hwitr = ~200 */ 2578 break; 2579 case bulk_latency: 2580 new_itr = 4000; 2581 break; 2582 default: 2583 break; 2584 } 2585 2586 set_itr_now: 2587 if (new_itr != adapter->itr) { 2588 /* this attempts to bias the interrupt rate towards Bulk 2589 * by adding intermediate steps when interrupt rate is 2590 * increasing 2591 */ 2592 new_itr = new_itr > adapter->itr ? 2593 min(adapter->itr + (new_itr >> 2), new_itr) : new_itr; 2594 adapter->itr = new_itr; 2595 adapter->rx_ring->itr_val = new_itr; 2596 if (adapter->msix_entries) 2597 adapter->rx_ring->set_itr = 1; 2598 else 2599 e1000e_write_itr(adapter, new_itr); 2600 } 2601 } 2602 2603 /** 2604 * e1000e_write_itr - write the ITR value to the appropriate registers 2605 * @adapter: address of board private structure 2606 * @itr: new ITR value to program 2607 * 2608 * e1000e_write_itr determines if the adapter is in MSI-X mode 2609 * and, if so, writes the EITR registers with the ITR value. 2610 * Otherwise, it writes the ITR value into the ITR register. 2611 **/ 2612 void e1000e_write_itr(struct e1000_adapter *adapter, u32 itr) 2613 { 2614 struct e1000_hw *hw = &adapter->hw; 2615 u32 new_itr = itr ? 1000000000 / (itr * 256) : 0; 2616 2617 if (adapter->msix_entries) { 2618 int vector; 2619 2620 for (vector = 0; vector < adapter->num_vectors; vector++) 2621 writel(new_itr, hw->hw_addr + E1000_EITR_82574(vector)); 2622 } else { 2623 ew32(ITR, new_itr); 2624 } 2625 } 2626 2627 /** 2628 * e1000_alloc_queues - Allocate memory for all rings 2629 * @adapter: board private structure to initialize 2630 **/ 2631 static int e1000_alloc_queues(struct e1000_adapter *adapter) 2632 { 2633 int size = sizeof(struct e1000_ring); 2634 2635 adapter->tx_ring = kzalloc(size, GFP_KERNEL); 2636 if (!adapter->tx_ring) 2637 goto err; 2638 adapter->tx_ring->count = adapter->tx_ring_count; 2639 adapter->tx_ring->adapter = adapter; 2640 2641 adapter->rx_ring = kzalloc(size, GFP_KERNEL); 2642 if (!adapter->rx_ring) 2643 goto err; 2644 adapter->rx_ring->count = adapter->rx_ring_count; 2645 adapter->rx_ring->adapter = adapter; 2646 2647 return 0; 2648 err: 2649 e_err("Unable to allocate memory for queues\n"); 2650 kfree(adapter->rx_ring); 2651 kfree(adapter->tx_ring); 2652 return -ENOMEM; 2653 } 2654 2655 /** 2656 * e1000e_poll - NAPI Rx polling callback 2657 * @napi: struct associated with this polling callback 2658 * @weight: number of packets driver is allowed to process this poll 2659 **/ 2660 static int e1000e_poll(struct napi_struct *napi, int weight) 2661 { 2662 struct e1000_adapter *adapter = container_of(napi, struct e1000_adapter, 2663 napi); 2664 struct e1000_hw *hw = &adapter->hw; 2665 struct net_device *poll_dev = adapter->netdev; 2666 int tx_cleaned = 1, work_done = 0; 2667 2668 adapter = netdev_priv(poll_dev); 2669 2670 if (!adapter->msix_entries || 2671 (adapter->rx_ring->ims_val & adapter->tx_ring->ims_val)) 2672 tx_cleaned = e1000_clean_tx_irq(adapter->tx_ring); 2673 2674 adapter->clean_rx(adapter->rx_ring, &work_done, weight); 2675 2676 if (!tx_cleaned) 2677 work_done = weight; 2678 2679 /* If weight not fully consumed, exit the polling mode */ 2680 if (work_done < weight) { 2681 if (adapter->itr_setting & 3) 2682 e1000_set_itr(adapter); 2683 napi_complete_done(napi, work_done); 2684 if (!test_bit(__E1000_DOWN, &adapter->state)) { 2685 if (adapter->msix_entries) 2686 ew32(IMS, adapter->rx_ring->ims_val); 2687 else 2688 e1000_irq_enable(adapter); 2689 } 2690 } 2691 2692 return work_done; 2693 } 2694 2695 static int e1000_vlan_rx_add_vid(struct net_device *netdev, 2696 __always_unused __be16 proto, u16 vid) 2697 { 2698 struct e1000_adapter *adapter = netdev_priv(netdev); 2699 struct e1000_hw *hw = &adapter->hw; 2700 u32 vfta, index; 2701 2702 /* don't update vlan cookie if already programmed */ 2703 if ((adapter->hw.mng_cookie.status & 2704 E1000_MNG_DHCP_COOKIE_STATUS_VLAN) && 2705 (vid == adapter->mng_vlan_id)) 2706 return 0; 2707 2708 /* add VID to filter table */ 2709 if (adapter->flags & FLAG_HAS_HW_VLAN_FILTER) { 2710 index = (vid >> 5) & 0x7F; 2711 vfta = E1000_READ_REG_ARRAY(hw, E1000_VFTA, index); 2712 vfta |= BIT((vid & 0x1F)); 2713 hw->mac.ops.write_vfta(hw, index, vfta); 2714 } 2715 2716 set_bit(vid, adapter->active_vlans); 2717 2718 return 0; 2719 } 2720 2721 static int e1000_vlan_rx_kill_vid(struct net_device *netdev, 2722 __always_unused __be16 proto, u16 vid) 2723 { 2724 struct e1000_adapter *adapter = netdev_priv(netdev); 2725 struct e1000_hw *hw = &adapter->hw; 2726 u32 vfta, index; 2727 2728 if ((adapter->hw.mng_cookie.status & 2729 E1000_MNG_DHCP_COOKIE_STATUS_VLAN) && 2730 (vid == adapter->mng_vlan_id)) { 2731 /* release control to f/w */ 2732 e1000e_release_hw_control(adapter); 2733 return 0; 2734 } 2735 2736 /* remove VID from filter table */ 2737 if (adapter->flags & FLAG_HAS_HW_VLAN_FILTER) { 2738 index = (vid >> 5) & 0x7F; 2739 vfta = E1000_READ_REG_ARRAY(hw, E1000_VFTA, index); 2740 vfta &= ~BIT((vid & 0x1F)); 2741 hw->mac.ops.write_vfta(hw, index, vfta); 2742 } 2743 2744 clear_bit(vid, adapter->active_vlans); 2745 2746 return 0; 2747 } 2748 2749 /** 2750 * e1000e_vlan_filter_disable - helper to disable hw VLAN filtering 2751 * @adapter: board private structure to initialize 2752 **/ 2753 static void e1000e_vlan_filter_disable(struct e1000_adapter *adapter) 2754 { 2755 struct net_device *netdev = adapter->netdev; 2756 struct e1000_hw *hw = &adapter->hw; 2757 u32 rctl; 2758 2759 if (adapter->flags & FLAG_HAS_HW_VLAN_FILTER) { 2760 /* disable VLAN receive filtering */ 2761 rctl = er32(RCTL); 2762 rctl &= ~(E1000_RCTL_VFE | E1000_RCTL_CFIEN); 2763 ew32(RCTL, rctl); 2764 2765 if (adapter->mng_vlan_id != (u16)E1000_MNG_VLAN_NONE) { 2766 e1000_vlan_rx_kill_vid(netdev, htons(ETH_P_8021Q), 2767 adapter->mng_vlan_id); 2768 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE; 2769 } 2770 } 2771 } 2772 2773 /** 2774 * e1000e_vlan_filter_enable - helper to enable HW VLAN filtering 2775 * @adapter: board private structure to initialize 2776 **/ 2777 static void e1000e_vlan_filter_enable(struct e1000_adapter *adapter) 2778 { 2779 struct e1000_hw *hw = &adapter->hw; 2780 u32 rctl; 2781 2782 if (adapter->flags & FLAG_HAS_HW_VLAN_FILTER) { 2783 /* enable VLAN receive filtering */ 2784 rctl = er32(RCTL); 2785 rctl |= E1000_RCTL_VFE; 2786 rctl &= ~E1000_RCTL_CFIEN; 2787 ew32(RCTL, rctl); 2788 } 2789 } 2790 2791 /** 2792 * e1000e_vlan_strip_disable - helper to disable HW VLAN stripping 2793 * @adapter: board private structure to initialize 2794 **/ 2795 static void e1000e_vlan_strip_disable(struct e1000_adapter *adapter) 2796 { 2797 struct e1000_hw *hw = &adapter->hw; 2798 u32 ctrl; 2799 2800 /* disable VLAN tag insert/strip */ 2801 ctrl = er32(CTRL); 2802 ctrl &= ~E1000_CTRL_VME; 2803 ew32(CTRL, ctrl); 2804 } 2805 2806 /** 2807 * e1000e_vlan_strip_enable - helper to enable HW VLAN stripping 2808 * @adapter: board private structure to initialize 2809 **/ 2810 static void e1000e_vlan_strip_enable(struct e1000_adapter *adapter) 2811 { 2812 struct e1000_hw *hw = &adapter->hw; 2813 u32 ctrl; 2814 2815 /* enable VLAN tag insert/strip */ 2816 ctrl = er32(CTRL); 2817 ctrl |= E1000_CTRL_VME; 2818 ew32(CTRL, ctrl); 2819 } 2820 2821 static void e1000_update_mng_vlan(struct e1000_adapter *adapter) 2822 { 2823 struct net_device *netdev = adapter->netdev; 2824 u16 vid = adapter->hw.mng_cookie.vlan_id; 2825 u16 old_vid = adapter->mng_vlan_id; 2826 2827 if (adapter->hw.mng_cookie.status & E1000_MNG_DHCP_COOKIE_STATUS_VLAN) { 2828 e1000_vlan_rx_add_vid(netdev, htons(ETH_P_8021Q), vid); 2829 adapter->mng_vlan_id = vid; 2830 } 2831 2832 if ((old_vid != (u16)E1000_MNG_VLAN_NONE) && (vid != old_vid)) 2833 e1000_vlan_rx_kill_vid(netdev, htons(ETH_P_8021Q), old_vid); 2834 } 2835 2836 static void e1000_restore_vlan(struct e1000_adapter *adapter) 2837 { 2838 u16 vid; 2839 2840 e1000_vlan_rx_add_vid(adapter->netdev, htons(ETH_P_8021Q), 0); 2841 2842 for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID) 2843 e1000_vlan_rx_add_vid(adapter->netdev, htons(ETH_P_8021Q), vid); 2844 } 2845 2846 static void e1000_init_manageability_pt(struct e1000_adapter *adapter) 2847 { 2848 struct e1000_hw *hw = &adapter->hw; 2849 u32 manc, manc2h, mdef, i, j; 2850 2851 if (!(adapter->flags & FLAG_MNG_PT_ENABLED)) 2852 return; 2853 2854 manc = er32(MANC); 2855 2856 /* enable receiving management packets to the host. this will probably 2857 * generate destination unreachable messages from the host OS, but 2858 * the packets will be handled on SMBUS 2859 */ 2860 manc |= E1000_MANC_EN_MNG2HOST; 2861 manc2h = er32(MANC2H); 2862 2863 switch (hw->mac.type) { 2864 default: 2865 manc2h |= (E1000_MANC2H_PORT_623 | E1000_MANC2H_PORT_664); 2866 break; 2867 case e1000_82574: 2868 case e1000_82583: 2869 /* Check if IPMI pass-through decision filter already exists; 2870 * if so, enable it. 2871 */ 2872 for (i = 0, j = 0; i < 8; i++) { 2873 mdef = er32(MDEF(i)); 2874 2875 /* Ignore filters with anything other than IPMI ports */ 2876 if (mdef & ~(E1000_MDEF_PORT_623 | E1000_MDEF_PORT_664)) 2877 continue; 2878 2879 /* Enable this decision filter in MANC2H */ 2880 if (mdef) 2881 manc2h |= BIT(i); 2882 2883 j |= mdef; 2884 } 2885 2886 if (j == (E1000_MDEF_PORT_623 | E1000_MDEF_PORT_664)) 2887 break; 2888 2889 /* Create new decision filter in an empty filter */ 2890 for (i = 0, j = 0; i < 8; i++) 2891 if (er32(MDEF(i)) == 0) { 2892 ew32(MDEF(i), (E1000_MDEF_PORT_623 | 2893 E1000_MDEF_PORT_664)); 2894 manc2h |= BIT(1); 2895 j++; 2896 break; 2897 } 2898 2899 if (!j) 2900 e_warn("Unable to create IPMI pass-through filter\n"); 2901 break; 2902 } 2903 2904 ew32(MANC2H, manc2h); 2905 ew32(MANC, manc); 2906 } 2907 2908 /** 2909 * e1000_configure_tx - Configure Transmit Unit after Reset 2910 * @adapter: board private structure 2911 * 2912 * Configure the Tx unit of the MAC after a reset. 2913 **/ 2914 static void e1000_configure_tx(struct e1000_adapter *adapter) 2915 { 2916 struct e1000_hw *hw = &adapter->hw; 2917 struct e1000_ring *tx_ring = adapter->tx_ring; 2918 u64 tdba; 2919 u32 tdlen, tctl, tarc; 2920 2921 /* Setup the HW Tx Head and Tail descriptor pointers */ 2922 tdba = tx_ring->dma; 2923 tdlen = tx_ring->count * sizeof(struct e1000_tx_desc); 2924 ew32(TDBAL(0), (tdba & DMA_BIT_MASK(32))); 2925 ew32(TDBAH(0), (tdba >> 32)); 2926 ew32(TDLEN(0), tdlen); 2927 ew32(TDH(0), 0); 2928 ew32(TDT(0), 0); 2929 tx_ring->head = adapter->hw.hw_addr + E1000_TDH(0); 2930 tx_ring->tail = adapter->hw.hw_addr + E1000_TDT(0); 2931 2932 writel(0, tx_ring->head); 2933 if (adapter->flags2 & FLAG2_PCIM2PCI_ARBITER_WA) 2934 e1000e_update_tdt_wa(tx_ring, 0); 2935 else 2936 writel(0, tx_ring->tail); 2937 2938 /* Set the Tx Interrupt Delay register */ 2939 ew32(TIDV, adapter->tx_int_delay); 2940 /* Tx irq moderation */ 2941 ew32(TADV, adapter->tx_abs_int_delay); 2942 2943 if (adapter->flags2 & FLAG2_DMA_BURST) { 2944 u32 txdctl = er32(TXDCTL(0)); 2945 2946 txdctl &= ~(E1000_TXDCTL_PTHRESH | E1000_TXDCTL_HTHRESH | 2947 E1000_TXDCTL_WTHRESH); 2948 /* set up some performance related parameters to encourage the 2949 * hardware to use the bus more efficiently in bursts, depends 2950 * on the tx_int_delay to be enabled, 2951 * wthresh = 1 ==> burst write is disabled to avoid Tx stalls 2952 * hthresh = 1 ==> prefetch when one or more available 2953 * pthresh = 0x1f ==> prefetch if internal cache 31 or less 2954 * BEWARE: this seems to work but should be considered first if 2955 * there are Tx hangs or other Tx related bugs 2956 */ 2957 txdctl |= E1000_TXDCTL_DMA_BURST_ENABLE; 2958 ew32(TXDCTL(0), txdctl); 2959 } 2960 /* erratum work around: set txdctl the same for both queues */ 2961 ew32(TXDCTL(1), er32(TXDCTL(0))); 2962 2963 /* Program the Transmit Control Register */ 2964 tctl = er32(TCTL); 2965 tctl &= ~E1000_TCTL_CT; 2966 tctl |= E1000_TCTL_PSP | E1000_TCTL_RTLC | 2967 (E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT); 2968 2969 if (adapter->flags & FLAG_TARC_SPEED_MODE_BIT) { 2970 tarc = er32(TARC(0)); 2971 /* set the speed mode bit, we'll clear it if we're not at 2972 * gigabit link later 2973 */ 2974 #define SPEED_MODE_BIT BIT(21) 2975 tarc |= SPEED_MODE_BIT; 2976 ew32(TARC(0), tarc); 2977 } 2978 2979 /* errata: program both queues to unweighted RR */ 2980 if (adapter->flags & FLAG_TARC_SET_BIT_ZERO) { 2981 tarc = er32(TARC(0)); 2982 tarc |= 1; 2983 ew32(TARC(0), tarc); 2984 tarc = er32(TARC(1)); 2985 tarc |= 1; 2986 ew32(TARC(1), tarc); 2987 } 2988 2989 /* Setup Transmit Descriptor Settings for eop descriptor */ 2990 adapter->txd_cmd = E1000_TXD_CMD_EOP | E1000_TXD_CMD_IFCS; 2991 2992 /* only set IDE if we are delaying interrupts using the timers */ 2993 if (adapter->tx_int_delay) 2994 adapter->txd_cmd |= E1000_TXD_CMD_IDE; 2995 2996 /* enable Report Status bit */ 2997 adapter->txd_cmd |= E1000_TXD_CMD_RS; 2998 2999 ew32(TCTL, tctl); 3000 3001 hw->mac.ops.config_collision_dist(hw); 3002 3003 /* SPT Si errata workaround to avoid data corruption */ 3004 if (hw->mac.type == e1000_pch_spt) { 3005 u32 reg_val; 3006 3007 reg_val = er32(IOSFPC); 3008 reg_val |= E1000_RCTL_RDMTS_HEX; 3009 ew32(IOSFPC, reg_val); 3010 3011 reg_val = er32(TARC(0)); 3012 reg_val |= E1000_TARC0_CB_MULTIQ_3_REQ; 3013 ew32(TARC(0), reg_val); 3014 } 3015 } 3016 3017 /** 3018 * e1000_setup_rctl - configure the receive control registers 3019 * @adapter: Board private structure 3020 **/ 3021 #define PAGE_USE_COUNT(S) (((S) >> PAGE_SHIFT) + \ 3022 (((S) & (PAGE_SIZE - 1)) ? 1 : 0)) 3023 static void e1000_setup_rctl(struct e1000_adapter *adapter) 3024 { 3025 struct e1000_hw *hw = &adapter->hw; 3026 u32 rctl, rfctl; 3027 u32 pages = 0; 3028 3029 /* Workaround Si errata on PCHx - configure jumbo frame flow. 3030 * If jumbo frames not set, program related MAC/PHY registers 3031 * to h/w defaults 3032 */ 3033 if (hw->mac.type >= e1000_pch2lan) { 3034 s32 ret_val; 3035 3036 if (adapter->netdev->mtu > ETH_DATA_LEN) 3037 ret_val = e1000_lv_jumbo_workaround_ich8lan(hw, true); 3038 else 3039 ret_val = e1000_lv_jumbo_workaround_ich8lan(hw, false); 3040 3041 if (ret_val) 3042 e_dbg("failed to enable|disable jumbo frame workaround mode\n"); 3043 } 3044 3045 /* Program MC offset vector base */ 3046 rctl = er32(RCTL); 3047 rctl &= ~(3 << E1000_RCTL_MO_SHIFT); 3048 rctl |= E1000_RCTL_EN | E1000_RCTL_BAM | 3049 E1000_RCTL_LBM_NO | E1000_RCTL_RDMTS_HALF | 3050 (adapter->hw.mac.mc_filter_type << E1000_RCTL_MO_SHIFT); 3051 3052 /* Do not Store bad packets */ 3053 rctl &= ~E1000_RCTL_SBP; 3054 3055 /* Enable Long Packet receive */ 3056 if (adapter->netdev->mtu <= ETH_DATA_LEN) 3057 rctl &= ~E1000_RCTL_LPE; 3058 else 3059 rctl |= E1000_RCTL_LPE; 3060 3061 /* Some systems expect that the CRC is included in SMBUS traffic. The 3062 * hardware strips the CRC before sending to both SMBUS (BMC) and to 3063 * host memory when this is enabled 3064 */ 3065 if (adapter->flags2 & FLAG2_CRC_STRIPPING) 3066 rctl |= E1000_RCTL_SECRC; 3067 3068 /* Workaround Si errata on 82577 PHY - configure IPG for jumbos */ 3069 if ((hw->phy.type == e1000_phy_82577) && (rctl & E1000_RCTL_LPE)) { 3070 u16 phy_data; 3071 3072 e1e_rphy(hw, PHY_REG(770, 26), &phy_data); 3073 phy_data &= 0xfff8; 3074 phy_data |= BIT(2); 3075 e1e_wphy(hw, PHY_REG(770, 26), phy_data); 3076 3077 e1e_rphy(hw, 22, &phy_data); 3078 phy_data &= 0x0fff; 3079 phy_data |= BIT(14); 3080 e1e_wphy(hw, 0x10, 0x2823); 3081 e1e_wphy(hw, 0x11, 0x0003); 3082 e1e_wphy(hw, 22, phy_data); 3083 } 3084 3085 /* Setup buffer sizes */ 3086 rctl &= ~E1000_RCTL_SZ_4096; 3087 rctl |= E1000_RCTL_BSEX; 3088 switch (adapter->rx_buffer_len) { 3089 case 2048: 3090 default: 3091 rctl |= E1000_RCTL_SZ_2048; 3092 rctl &= ~E1000_RCTL_BSEX; 3093 break; 3094 case 4096: 3095 rctl |= E1000_RCTL_SZ_4096; 3096 break; 3097 case 8192: 3098 rctl |= E1000_RCTL_SZ_8192; 3099 break; 3100 case 16384: 3101 rctl |= E1000_RCTL_SZ_16384; 3102 break; 3103 } 3104 3105 /* Enable Extended Status in all Receive Descriptors */ 3106 rfctl = er32(RFCTL); 3107 rfctl |= E1000_RFCTL_EXTEN; 3108 ew32(RFCTL, rfctl); 3109 3110 /* 82571 and greater support packet-split where the protocol 3111 * header is placed in skb->data and the packet data is 3112 * placed in pages hanging off of skb_shinfo(skb)->nr_frags. 3113 * In the case of a non-split, skb->data is linearly filled, 3114 * followed by the page buffers. Therefore, skb->data is 3115 * sized to hold the largest protocol header. 3116 * 3117 * allocations using alloc_page take too long for regular MTU 3118 * so only enable packet split for jumbo frames 3119 * 3120 * Using pages when the page size is greater than 16k wastes 3121 * a lot of memory, since we allocate 3 pages at all times 3122 * per packet. 3123 */ 3124 pages = PAGE_USE_COUNT(adapter->netdev->mtu); 3125 if ((pages <= 3) && (PAGE_SIZE <= 16384) && (rctl & E1000_RCTL_LPE)) 3126 adapter->rx_ps_pages = pages; 3127 else 3128 adapter->rx_ps_pages = 0; 3129 3130 if (adapter->rx_ps_pages) { 3131 u32 psrctl = 0; 3132 3133 /* Enable Packet split descriptors */ 3134 rctl |= E1000_RCTL_DTYP_PS; 3135 3136 psrctl |= adapter->rx_ps_bsize0 >> E1000_PSRCTL_BSIZE0_SHIFT; 3137 3138 switch (adapter->rx_ps_pages) { 3139 case 3: 3140 psrctl |= PAGE_SIZE << E1000_PSRCTL_BSIZE3_SHIFT; 3141 /* fall-through */ 3142 case 2: 3143 psrctl |= PAGE_SIZE << E1000_PSRCTL_BSIZE2_SHIFT; 3144 /* fall-through */ 3145 case 1: 3146 psrctl |= PAGE_SIZE >> E1000_PSRCTL_BSIZE1_SHIFT; 3147 break; 3148 } 3149 3150 ew32(PSRCTL, psrctl); 3151 } 3152 3153 /* This is useful for sniffing bad packets. */ 3154 if (adapter->netdev->features & NETIF_F_RXALL) { 3155 /* UPE and MPE will be handled by normal PROMISC logic 3156 * in e1000e_set_rx_mode 3157 */ 3158 rctl |= (E1000_RCTL_SBP | /* Receive bad packets */ 3159 E1000_RCTL_BAM | /* RX All Bcast Pkts */ 3160 E1000_RCTL_PMCF); /* RX All MAC Ctrl Pkts */ 3161 3162 rctl &= ~(E1000_RCTL_VFE | /* Disable VLAN filter */ 3163 E1000_RCTL_DPF | /* Allow filtered pause */ 3164 E1000_RCTL_CFIEN); /* Dis VLAN CFIEN Filter */ 3165 /* Do not mess with E1000_CTRL_VME, it affects transmit as well, 3166 * and that breaks VLANs. 3167 */ 3168 } 3169 3170 ew32(RCTL, rctl); 3171 /* just started the receive unit, no need to restart */ 3172 adapter->flags &= ~FLAG_RESTART_NOW; 3173 } 3174 3175 /** 3176 * e1000_configure_rx - Configure Receive Unit after Reset 3177 * @adapter: board private structure 3178 * 3179 * Configure the Rx unit of the MAC after a reset. 3180 **/ 3181 static void e1000_configure_rx(struct e1000_adapter *adapter) 3182 { 3183 struct e1000_hw *hw = &adapter->hw; 3184 struct e1000_ring *rx_ring = adapter->rx_ring; 3185 u64 rdba; 3186 u32 rdlen, rctl, rxcsum, ctrl_ext; 3187 3188 if (adapter->rx_ps_pages) { 3189 /* this is a 32 byte descriptor */ 3190 rdlen = rx_ring->count * 3191 sizeof(union e1000_rx_desc_packet_split); 3192 adapter->clean_rx = e1000_clean_rx_irq_ps; 3193 adapter->alloc_rx_buf = e1000_alloc_rx_buffers_ps; 3194 } else if (adapter->netdev->mtu > ETH_FRAME_LEN + ETH_FCS_LEN) { 3195 rdlen = rx_ring->count * sizeof(union e1000_rx_desc_extended); 3196 adapter->clean_rx = e1000_clean_jumbo_rx_irq; 3197 adapter->alloc_rx_buf = e1000_alloc_jumbo_rx_buffers; 3198 } else { 3199 rdlen = rx_ring->count * sizeof(union e1000_rx_desc_extended); 3200 adapter->clean_rx = e1000_clean_rx_irq; 3201 adapter->alloc_rx_buf = e1000_alloc_rx_buffers; 3202 } 3203 3204 /* disable receives while setting up the descriptors */ 3205 rctl = er32(RCTL); 3206 if (!(adapter->flags2 & FLAG2_NO_DISABLE_RX)) 3207 ew32(RCTL, rctl & ~E1000_RCTL_EN); 3208 e1e_flush(); 3209 usleep_range(10000, 20000); 3210 3211 if (adapter->flags2 & FLAG2_DMA_BURST) { 3212 /* set the writeback threshold (only takes effect if the RDTR 3213 * is set). set GRAN=1 and write back up to 0x4 worth, and 3214 * enable prefetching of 0x20 Rx descriptors 3215 * granularity = 01 3216 * wthresh = 04, 3217 * hthresh = 04, 3218 * pthresh = 0x20 3219 */ 3220 ew32(RXDCTL(0), E1000_RXDCTL_DMA_BURST_ENABLE); 3221 ew32(RXDCTL(1), E1000_RXDCTL_DMA_BURST_ENABLE); 3222 3223 /* override the delay timers for enabling bursting, only if 3224 * the value was not set by the user via module options 3225 */ 3226 if (adapter->rx_int_delay == DEFAULT_RDTR) 3227 adapter->rx_int_delay = BURST_RDTR; 3228 if (adapter->rx_abs_int_delay == DEFAULT_RADV) 3229 adapter->rx_abs_int_delay = BURST_RADV; 3230 } 3231 3232 /* set the Receive Delay Timer Register */ 3233 ew32(RDTR, adapter->rx_int_delay); 3234 3235 /* irq moderation */ 3236 ew32(RADV, adapter->rx_abs_int_delay); 3237 if ((adapter->itr_setting != 0) && (adapter->itr != 0)) 3238 e1000e_write_itr(adapter, adapter->itr); 3239 3240 ctrl_ext = er32(CTRL_EXT); 3241 /* Auto-Mask interrupts upon ICR access */ 3242 ctrl_ext |= E1000_CTRL_EXT_IAME; 3243 ew32(IAM, 0xffffffff); 3244 ew32(CTRL_EXT, ctrl_ext); 3245 e1e_flush(); 3246 3247 /* Setup the HW Rx Head and Tail Descriptor Pointers and 3248 * the Base and Length of the Rx Descriptor Ring 3249 */ 3250 rdba = rx_ring->dma; 3251 ew32(RDBAL(0), (rdba & DMA_BIT_MASK(32))); 3252 ew32(RDBAH(0), (rdba >> 32)); 3253 ew32(RDLEN(0), rdlen); 3254 ew32(RDH(0), 0); 3255 ew32(RDT(0), 0); 3256 rx_ring->head = adapter->hw.hw_addr + E1000_RDH(0); 3257 rx_ring->tail = adapter->hw.hw_addr + E1000_RDT(0); 3258 3259 writel(0, rx_ring->head); 3260 if (adapter->flags2 & FLAG2_PCIM2PCI_ARBITER_WA) 3261 e1000e_update_rdt_wa(rx_ring, 0); 3262 else 3263 writel(0, rx_ring->tail); 3264 3265 /* Enable Receive Checksum Offload for TCP and UDP */ 3266 rxcsum = er32(RXCSUM); 3267 if (adapter->netdev->features & NETIF_F_RXCSUM) 3268 rxcsum |= E1000_RXCSUM_TUOFL; 3269 else 3270 rxcsum &= ~E1000_RXCSUM_TUOFL; 3271 ew32(RXCSUM, rxcsum); 3272 3273 /* With jumbo frames, excessive C-state transition latencies result 3274 * in dropped transactions. 3275 */ 3276 if (adapter->netdev->mtu > ETH_DATA_LEN) { 3277 u32 lat = 3278 ((er32(PBA) & E1000_PBA_RXA_MASK) * 1024 - 3279 adapter->max_frame_size) * 8 / 1000; 3280 3281 if (adapter->flags & FLAG_IS_ICH) { 3282 u32 rxdctl = er32(RXDCTL(0)); 3283 3284 ew32(RXDCTL(0), rxdctl | 0x3); 3285 } 3286 3287 pm_qos_update_request(&adapter->pm_qos_req, lat); 3288 } else { 3289 pm_qos_update_request(&adapter->pm_qos_req, 3290 PM_QOS_DEFAULT_VALUE); 3291 } 3292 3293 /* Enable Receives */ 3294 ew32(RCTL, rctl); 3295 } 3296 3297 /** 3298 * e1000e_write_mc_addr_list - write multicast addresses to MTA 3299 * @netdev: network interface device structure 3300 * 3301 * Writes multicast address list to the MTA hash table. 3302 * Returns: -ENOMEM on failure 3303 * 0 on no addresses written 3304 * X on writing X addresses to MTA 3305 */ 3306 static int e1000e_write_mc_addr_list(struct net_device *netdev) 3307 { 3308 struct e1000_adapter *adapter = netdev_priv(netdev); 3309 struct e1000_hw *hw = &adapter->hw; 3310 struct netdev_hw_addr *ha; 3311 u8 *mta_list; 3312 int i; 3313 3314 if (netdev_mc_empty(netdev)) { 3315 /* nothing to program, so clear mc list */ 3316 hw->mac.ops.update_mc_addr_list(hw, NULL, 0); 3317 return 0; 3318 } 3319 3320 mta_list = kzalloc(netdev_mc_count(netdev) * ETH_ALEN, GFP_ATOMIC); 3321 if (!mta_list) 3322 return -ENOMEM; 3323 3324 /* update_mc_addr_list expects a packed array of only addresses. */ 3325 i = 0; 3326 netdev_for_each_mc_addr(ha, netdev) 3327 memcpy(mta_list + (i++ * ETH_ALEN), ha->addr, ETH_ALEN); 3328 3329 hw->mac.ops.update_mc_addr_list(hw, mta_list, i); 3330 kfree(mta_list); 3331 3332 return netdev_mc_count(netdev); 3333 } 3334 3335 /** 3336 * e1000e_write_uc_addr_list - write unicast addresses to RAR table 3337 * @netdev: network interface device structure 3338 * 3339 * Writes unicast address list to the RAR table. 3340 * Returns: -ENOMEM on failure/insufficient address space 3341 * 0 on no addresses written 3342 * X on writing X addresses to the RAR table 3343 **/ 3344 static int e1000e_write_uc_addr_list(struct net_device *netdev) 3345 { 3346 struct e1000_adapter *adapter = netdev_priv(netdev); 3347 struct e1000_hw *hw = &adapter->hw; 3348 unsigned int rar_entries; 3349 int count = 0; 3350 3351 rar_entries = hw->mac.ops.rar_get_count(hw); 3352 3353 /* save a rar entry for our hardware address */ 3354 rar_entries--; 3355 3356 /* save a rar entry for the LAA workaround */ 3357 if (adapter->flags & FLAG_RESET_OVERWRITES_LAA) 3358 rar_entries--; 3359 3360 /* return ENOMEM indicating insufficient memory for addresses */ 3361 if (netdev_uc_count(netdev) > rar_entries) 3362 return -ENOMEM; 3363 3364 if (!netdev_uc_empty(netdev) && rar_entries) { 3365 struct netdev_hw_addr *ha; 3366 3367 /* write the addresses in reverse order to avoid write 3368 * combining 3369 */ 3370 netdev_for_each_uc_addr(ha, netdev) { 3371 int ret_val; 3372 3373 if (!rar_entries) 3374 break; 3375 ret_val = hw->mac.ops.rar_set(hw, ha->addr, rar_entries--); 3376 if (ret_val < 0) 3377 return -ENOMEM; 3378 count++; 3379 } 3380 } 3381 3382 /* zero out the remaining RAR entries not used above */ 3383 for (; rar_entries > 0; rar_entries--) { 3384 ew32(RAH(rar_entries), 0); 3385 ew32(RAL(rar_entries), 0); 3386 } 3387 e1e_flush(); 3388 3389 return count; 3390 } 3391 3392 /** 3393 * e1000e_set_rx_mode - secondary unicast, Multicast and Promiscuous mode set 3394 * @netdev: network interface device structure 3395 * 3396 * The ndo_set_rx_mode entry point is called whenever the unicast or multicast 3397 * address list or the network interface flags are updated. This routine is 3398 * responsible for configuring the hardware for proper unicast, multicast, 3399 * promiscuous mode, and all-multi behavior. 3400 **/ 3401 static void e1000e_set_rx_mode(struct net_device *netdev) 3402 { 3403 struct e1000_adapter *adapter = netdev_priv(netdev); 3404 struct e1000_hw *hw = &adapter->hw; 3405 u32 rctl; 3406 3407 if (pm_runtime_suspended(netdev->dev.parent)) 3408 return; 3409 3410 /* Check for Promiscuous and All Multicast modes */ 3411 rctl = er32(RCTL); 3412 3413 /* clear the affected bits */ 3414 rctl &= ~(E1000_RCTL_UPE | E1000_RCTL_MPE); 3415 3416 if (netdev->flags & IFF_PROMISC) { 3417 rctl |= (E1000_RCTL_UPE | E1000_RCTL_MPE); 3418 /* Do not hardware filter VLANs in promisc mode */ 3419 e1000e_vlan_filter_disable(adapter); 3420 } else { 3421 int count; 3422 3423 if (netdev->flags & IFF_ALLMULTI) { 3424 rctl |= E1000_RCTL_MPE; 3425 } else { 3426 /* Write addresses to the MTA, if the attempt fails 3427 * then we should just turn on promiscuous mode so 3428 * that we can at least receive multicast traffic 3429 */ 3430 count = e1000e_write_mc_addr_list(netdev); 3431 if (count < 0) 3432 rctl |= E1000_RCTL_MPE; 3433 } 3434 e1000e_vlan_filter_enable(adapter); 3435 /* Write addresses to available RAR registers, if there is not 3436 * sufficient space to store all the addresses then enable 3437 * unicast promiscuous mode 3438 */ 3439 count = e1000e_write_uc_addr_list(netdev); 3440 if (count < 0) 3441 rctl |= E1000_RCTL_UPE; 3442 } 3443 3444 ew32(RCTL, rctl); 3445 3446 if (netdev->features & NETIF_F_HW_VLAN_CTAG_RX) 3447 e1000e_vlan_strip_enable(adapter); 3448 else 3449 e1000e_vlan_strip_disable(adapter); 3450 } 3451 3452 static void e1000e_setup_rss_hash(struct e1000_adapter *adapter) 3453 { 3454 struct e1000_hw *hw = &adapter->hw; 3455 u32 mrqc, rxcsum; 3456 u32 rss_key[10]; 3457 int i; 3458 3459 netdev_rss_key_fill(rss_key, sizeof(rss_key)); 3460 for (i = 0; i < 10; i++) 3461 ew32(RSSRK(i), rss_key[i]); 3462 3463 /* Direct all traffic to queue 0 */ 3464 for (i = 0; i < 32; i++) 3465 ew32(RETA(i), 0); 3466 3467 /* Disable raw packet checksumming so that RSS hash is placed in 3468 * descriptor on writeback. 3469 */ 3470 rxcsum = er32(RXCSUM); 3471 rxcsum |= E1000_RXCSUM_PCSD; 3472 3473 ew32(RXCSUM, rxcsum); 3474 3475 mrqc = (E1000_MRQC_RSS_FIELD_IPV4 | 3476 E1000_MRQC_RSS_FIELD_IPV4_TCP | 3477 E1000_MRQC_RSS_FIELD_IPV6 | 3478 E1000_MRQC_RSS_FIELD_IPV6_TCP | 3479 E1000_MRQC_RSS_FIELD_IPV6_TCP_EX); 3480 3481 ew32(MRQC, mrqc); 3482 } 3483 3484 /** 3485 * e1000e_get_base_timinca - get default SYSTIM time increment attributes 3486 * @adapter: board private structure 3487 * @timinca: pointer to returned time increment attributes 3488 * 3489 * Get attributes for incrementing the System Time Register SYSTIML/H at 3490 * the default base frequency, and set the cyclecounter shift value. 3491 **/ 3492 s32 e1000e_get_base_timinca(struct e1000_adapter *adapter, u32 *timinca) 3493 { 3494 struct e1000_hw *hw = &adapter->hw; 3495 u32 incvalue, incperiod, shift; 3496 3497 /* Make sure clock is enabled on I217/I218/I219 before checking 3498 * the frequency 3499 */ 3500 if (((hw->mac.type == e1000_pch_lpt) || 3501 (hw->mac.type == e1000_pch_spt)) && 3502 !(er32(TSYNCTXCTL) & E1000_TSYNCTXCTL_ENABLED) && 3503 !(er32(TSYNCRXCTL) & E1000_TSYNCRXCTL_ENABLED)) { 3504 u32 fextnvm7 = er32(FEXTNVM7); 3505 3506 if (!(fextnvm7 & BIT(0))) { 3507 ew32(FEXTNVM7, fextnvm7 | BIT(0)); 3508 e1e_flush(); 3509 } 3510 } 3511 3512 switch (hw->mac.type) { 3513 case e1000_pch2lan: 3514 case e1000_pch_lpt: 3515 if (er32(TSYNCRXCTL) & E1000_TSYNCRXCTL_SYSCFI) { 3516 /* Stable 96MHz frequency */ 3517 incperiod = INCPERIOD_96MHz; 3518 incvalue = INCVALUE_96MHz; 3519 shift = INCVALUE_SHIFT_96MHz; 3520 adapter->cc.shift = shift + INCPERIOD_SHIFT_96MHz; 3521 } else { 3522 /* Stable 25MHz frequency */ 3523 incperiod = INCPERIOD_25MHz; 3524 incvalue = INCVALUE_25MHz; 3525 shift = INCVALUE_SHIFT_25MHz; 3526 adapter->cc.shift = shift; 3527 } 3528 break; 3529 case e1000_pch_spt: 3530 if (er32(TSYNCRXCTL) & E1000_TSYNCRXCTL_SYSCFI) { 3531 /* Stable 24MHz frequency */ 3532 incperiod = INCPERIOD_24MHz; 3533 incvalue = INCVALUE_24MHz; 3534 shift = INCVALUE_SHIFT_24MHz; 3535 adapter->cc.shift = shift; 3536 break; 3537 } 3538 return -EINVAL; 3539 case e1000_82574: 3540 case e1000_82583: 3541 /* Stable 25MHz frequency */ 3542 incperiod = INCPERIOD_25MHz; 3543 incvalue = INCVALUE_25MHz; 3544 shift = INCVALUE_SHIFT_25MHz; 3545 adapter->cc.shift = shift; 3546 break; 3547 default: 3548 return -EINVAL; 3549 } 3550 3551 *timinca = ((incperiod << E1000_TIMINCA_INCPERIOD_SHIFT) | 3552 ((incvalue << shift) & E1000_TIMINCA_INCVALUE_MASK)); 3553 3554 return 0; 3555 } 3556 3557 /** 3558 * e1000e_config_hwtstamp - configure the hwtstamp registers and enable/disable 3559 * @adapter: board private structure 3560 * 3561 * Outgoing time stamping can be enabled and disabled. Play nice and 3562 * disable it when requested, although it shouldn't cause any overhead 3563 * when no packet needs it. At most one packet in the queue may be 3564 * marked for time stamping, otherwise it would be impossible to tell 3565 * for sure to which packet the hardware time stamp belongs. 3566 * 3567 * Incoming time stamping has to be configured via the hardware filters. 3568 * Not all combinations are supported, in particular event type has to be 3569 * specified. Matching the kind of event packet is not supported, with the 3570 * exception of "all V2 events regardless of level 2 or 4". 3571 **/ 3572 static int e1000e_config_hwtstamp(struct e1000_adapter *adapter, 3573 struct hwtstamp_config *config) 3574 { 3575 struct e1000_hw *hw = &adapter->hw; 3576 u32 tsync_tx_ctl = E1000_TSYNCTXCTL_ENABLED; 3577 u32 tsync_rx_ctl = E1000_TSYNCRXCTL_ENABLED; 3578 u32 rxmtrl = 0; 3579 u16 rxudp = 0; 3580 bool is_l4 = false; 3581 bool is_l2 = false; 3582 u32 regval; 3583 3584 if (!(adapter->flags & FLAG_HAS_HW_TIMESTAMP)) 3585 return -EINVAL; 3586 3587 /* flags reserved for future extensions - must be zero */ 3588 if (config->flags) 3589 return -EINVAL; 3590 3591 switch (config->tx_type) { 3592 case HWTSTAMP_TX_OFF: 3593 tsync_tx_ctl = 0; 3594 break; 3595 case HWTSTAMP_TX_ON: 3596 break; 3597 default: 3598 return -ERANGE; 3599 } 3600 3601 switch (config->rx_filter) { 3602 case HWTSTAMP_FILTER_NONE: 3603 tsync_rx_ctl = 0; 3604 break; 3605 case HWTSTAMP_FILTER_PTP_V1_L4_SYNC: 3606 tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_L4_V1; 3607 rxmtrl = E1000_RXMTRL_PTP_V1_SYNC_MESSAGE; 3608 is_l4 = true; 3609 break; 3610 case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ: 3611 tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_L4_V1; 3612 rxmtrl = E1000_RXMTRL_PTP_V1_DELAY_REQ_MESSAGE; 3613 is_l4 = true; 3614 break; 3615 case HWTSTAMP_FILTER_PTP_V2_L2_SYNC: 3616 /* Also time stamps V2 L2 Path Delay Request/Response */ 3617 tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_L2_V2; 3618 rxmtrl = E1000_RXMTRL_PTP_V2_SYNC_MESSAGE; 3619 is_l2 = true; 3620 break; 3621 case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ: 3622 /* Also time stamps V2 L2 Path Delay Request/Response. */ 3623 tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_L2_V2; 3624 rxmtrl = E1000_RXMTRL_PTP_V2_DELAY_REQ_MESSAGE; 3625 is_l2 = true; 3626 break; 3627 case HWTSTAMP_FILTER_PTP_V2_L4_SYNC: 3628 /* Hardware cannot filter just V2 L4 Sync messages; 3629 * fall-through to V2 (both L2 and L4) Sync. 3630 */ 3631 case HWTSTAMP_FILTER_PTP_V2_SYNC: 3632 /* Also time stamps V2 Path Delay Request/Response. */ 3633 tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_L2_L4_V2; 3634 rxmtrl = E1000_RXMTRL_PTP_V2_SYNC_MESSAGE; 3635 is_l2 = true; 3636 is_l4 = true; 3637 break; 3638 case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ: 3639 /* Hardware cannot filter just V2 L4 Delay Request messages; 3640 * fall-through to V2 (both L2 and L4) Delay Request. 3641 */ 3642 case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ: 3643 /* Also time stamps V2 Path Delay Request/Response. */ 3644 tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_L2_L4_V2; 3645 rxmtrl = E1000_RXMTRL_PTP_V2_DELAY_REQ_MESSAGE; 3646 is_l2 = true; 3647 is_l4 = true; 3648 break; 3649 case HWTSTAMP_FILTER_PTP_V2_L4_EVENT: 3650 case HWTSTAMP_FILTER_PTP_V2_L2_EVENT: 3651 /* Hardware cannot filter just V2 L4 or L2 Event messages; 3652 * fall-through to all V2 (both L2 and L4) Events. 3653 */ 3654 case HWTSTAMP_FILTER_PTP_V2_EVENT: 3655 tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_EVENT_V2; 3656 config->rx_filter = HWTSTAMP_FILTER_PTP_V2_EVENT; 3657 is_l2 = true; 3658 is_l4 = true; 3659 break; 3660 case HWTSTAMP_FILTER_PTP_V1_L4_EVENT: 3661 /* For V1, the hardware can only filter Sync messages or 3662 * Delay Request messages but not both so fall-through to 3663 * time stamp all packets. 3664 */ 3665 case HWTSTAMP_FILTER_ALL: 3666 is_l2 = true; 3667 is_l4 = true; 3668 tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_ALL; 3669 config->rx_filter = HWTSTAMP_FILTER_ALL; 3670 break; 3671 default: 3672 return -ERANGE; 3673 } 3674 3675 adapter->hwtstamp_config = *config; 3676 3677 /* enable/disable Tx h/w time stamping */ 3678 regval = er32(TSYNCTXCTL); 3679 regval &= ~E1000_TSYNCTXCTL_ENABLED; 3680 regval |= tsync_tx_ctl; 3681 ew32(TSYNCTXCTL, regval); 3682 if ((er32(TSYNCTXCTL) & E1000_TSYNCTXCTL_ENABLED) != 3683 (regval & E1000_TSYNCTXCTL_ENABLED)) { 3684 e_err("Timesync Tx Control register not set as expected\n"); 3685 return -EAGAIN; 3686 } 3687 3688 /* enable/disable Rx h/w time stamping */ 3689 regval = er32(TSYNCRXCTL); 3690 regval &= ~(E1000_TSYNCRXCTL_ENABLED | E1000_TSYNCRXCTL_TYPE_MASK); 3691 regval |= tsync_rx_ctl; 3692 ew32(TSYNCRXCTL, regval); 3693 if ((er32(TSYNCRXCTL) & (E1000_TSYNCRXCTL_ENABLED | 3694 E1000_TSYNCRXCTL_TYPE_MASK)) != 3695 (regval & (E1000_TSYNCRXCTL_ENABLED | 3696 E1000_TSYNCRXCTL_TYPE_MASK))) { 3697 e_err("Timesync Rx Control register not set as expected\n"); 3698 return -EAGAIN; 3699 } 3700 3701 /* L2: define ethertype filter for time stamped packets */ 3702 if (is_l2) 3703 rxmtrl |= ETH_P_1588; 3704 3705 /* define which PTP packets get time stamped */ 3706 ew32(RXMTRL, rxmtrl); 3707 3708 /* Filter by destination port */ 3709 if (is_l4) { 3710 rxudp = PTP_EV_PORT; 3711 cpu_to_be16s(&rxudp); 3712 } 3713 ew32(RXUDP, rxudp); 3714 3715 e1e_flush(); 3716 3717 /* Clear TSYNCRXCTL_VALID & TSYNCTXCTL_VALID bit */ 3718 er32(RXSTMPH); 3719 er32(TXSTMPH); 3720 3721 return 0; 3722 } 3723 3724 /** 3725 * e1000_configure - configure the hardware for Rx and Tx 3726 * @adapter: private board structure 3727 **/ 3728 static void e1000_configure(struct e1000_adapter *adapter) 3729 { 3730 struct e1000_ring *rx_ring = adapter->rx_ring; 3731 3732 e1000e_set_rx_mode(adapter->netdev); 3733 3734 e1000_restore_vlan(adapter); 3735 e1000_init_manageability_pt(adapter); 3736 3737 e1000_configure_tx(adapter); 3738 3739 if (adapter->netdev->features & NETIF_F_RXHASH) 3740 e1000e_setup_rss_hash(adapter); 3741 e1000_setup_rctl(adapter); 3742 e1000_configure_rx(adapter); 3743 adapter->alloc_rx_buf(rx_ring, e1000_desc_unused(rx_ring), GFP_KERNEL); 3744 } 3745 3746 /** 3747 * e1000e_power_up_phy - restore link in case the phy was powered down 3748 * @adapter: address of board private structure 3749 * 3750 * The phy may be powered down to save power and turn off link when the 3751 * driver is unloaded and wake on lan is not enabled (among others) 3752 * *** this routine MUST be followed by a call to e1000e_reset *** 3753 **/ 3754 void e1000e_power_up_phy(struct e1000_adapter *adapter) 3755 { 3756 if (adapter->hw.phy.ops.power_up) 3757 adapter->hw.phy.ops.power_up(&adapter->hw); 3758 3759 adapter->hw.mac.ops.setup_link(&adapter->hw); 3760 } 3761 3762 /** 3763 * e1000_power_down_phy - Power down the PHY 3764 * 3765 * Power down the PHY so no link is implied when interface is down. 3766 * The PHY cannot be powered down if management or WoL is active. 3767 */ 3768 static void e1000_power_down_phy(struct e1000_adapter *adapter) 3769 { 3770 if (adapter->hw.phy.ops.power_down) 3771 adapter->hw.phy.ops.power_down(&adapter->hw); 3772 } 3773 3774 /** 3775 * e1000_flush_tx_ring - remove all descriptors from the tx_ring 3776 * 3777 * We want to clear all pending descriptors from the TX ring. 3778 * zeroing happens when the HW reads the regs. We assign the ring itself as 3779 * the data of the next descriptor. We don't care about the data we are about 3780 * to reset the HW. 3781 */ 3782 static void e1000_flush_tx_ring(struct e1000_adapter *adapter) 3783 { 3784 struct e1000_hw *hw = &adapter->hw; 3785 struct e1000_ring *tx_ring = adapter->tx_ring; 3786 struct e1000_tx_desc *tx_desc = NULL; 3787 u32 tdt, tctl, txd_lower = E1000_TXD_CMD_IFCS; 3788 u16 size = 512; 3789 3790 tctl = er32(TCTL); 3791 ew32(TCTL, tctl | E1000_TCTL_EN); 3792 tdt = er32(TDT(0)); 3793 BUG_ON(tdt != tx_ring->next_to_use); 3794 tx_desc = E1000_TX_DESC(*tx_ring, tx_ring->next_to_use); 3795 tx_desc->buffer_addr = tx_ring->dma; 3796 3797 tx_desc->lower.data = cpu_to_le32(txd_lower | size); 3798 tx_desc->upper.data = 0; 3799 /* flush descriptors to memory before notifying the HW */ 3800 wmb(); 3801 tx_ring->next_to_use++; 3802 if (tx_ring->next_to_use == tx_ring->count) 3803 tx_ring->next_to_use = 0; 3804 ew32(TDT(0), tx_ring->next_to_use); 3805 mmiowb(); 3806 usleep_range(200, 250); 3807 } 3808 3809 /** 3810 * e1000_flush_rx_ring - remove all descriptors from the rx_ring 3811 * 3812 * Mark all descriptors in the RX ring as consumed and disable the rx ring 3813 */ 3814 static void e1000_flush_rx_ring(struct e1000_adapter *adapter) 3815 { 3816 u32 rctl, rxdctl; 3817 struct e1000_hw *hw = &adapter->hw; 3818 3819 rctl = er32(RCTL); 3820 ew32(RCTL, rctl & ~E1000_RCTL_EN); 3821 e1e_flush(); 3822 usleep_range(100, 150); 3823 3824 rxdctl = er32(RXDCTL(0)); 3825 /* zero the lower 14 bits (prefetch and host thresholds) */ 3826 rxdctl &= 0xffffc000; 3827 3828 /* update thresholds: prefetch threshold to 31, host threshold to 1 3829 * and make sure the granularity is "descriptors" and not "cache lines" 3830 */ 3831 rxdctl |= (0x1F | BIT(8) | E1000_RXDCTL_THRESH_UNIT_DESC); 3832 3833 ew32(RXDCTL(0), rxdctl); 3834 /* momentarily enable the RX ring for the changes to take effect */ 3835 ew32(RCTL, rctl | E1000_RCTL_EN); 3836 e1e_flush(); 3837 usleep_range(100, 150); 3838 ew32(RCTL, rctl & ~E1000_RCTL_EN); 3839 } 3840 3841 /** 3842 * e1000_flush_desc_rings - remove all descriptors from the descriptor rings 3843 * 3844 * In i219, the descriptor rings must be emptied before resetting the HW 3845 * or before changing the device state to D3 during runtime (runtime PM). 3846 * 3847 * Failure to do this will cause the HW to enter a unit hang state which can 3848 * only be released by PCI reset on the device 3849 * 3850 */ 3851 3852 static void e1000_flush_desc_rings(struct e1000_adapter *adapter) 3853 { 3854 u16 hang_state; 3855 u32 fext_nvm11, tdlen; 3856 struct e1000_hw *hw = &adapter->hw; 3857 3858 /* First, disable MULR fix in FEXTNVM11 */ 3859 fext_nvm11 = er32(FEXTNVM11); 3860 fext_nvm11 |= E1000_FEXTNVM11_DISABLE_MULR_FIX; 3861 ew32(FEXTNVM11, fext_nvm11); 3862 /* do nothing if we're not in faulty state, or if the queue is empty */ 3863 tdlen = er32(TDLEN(0)); 3864 pci_read_config_word(adapter->pdev, PCICFG_DESC_RING_STATUS, 3865 &hang_state); 3866 if (!(hang_state & FLUSH_DESC_REQUIRED) || !tdlen) 3867 return; 3868 e1000_flush_tx_ring(adapter); 3869 /* recheck, maybe the fault is caused by the rx ring */ 3870 pci_read_config_word(adapter->pdev, PCICFG_DESC_RING_STATUS, 3871 &hang_state); 3872 if (hang_state & FLUSH_DESC_REQUIRED) 3873 e1000_flush_rx_ring(adapter); 3874 } 3875 3876 /** 3877 * e1000e_systim_reset - reset the timesync registers after a hardware reset 3878 * @adapter: board private structure 3879 * 3880 * When the MAC is reset, all hardware bits for timesync will be reset to the 3881 * default values. This function will restore the settings last in place. 3882 * Since the clock SYSTIME registers are reset, we will simply restore the 3883 * cyclecounter to the kernel real clock time. 3884 **/ 3885 static void e1000e_systim_reset(struct e1000_adapter *adapter) 3886 { 3887 struct ptp_clock_info *info = &adapter->ptp_clock_info; 3888 struct e1000_hw *hw = &adapter->hw; 3889 unsigned long flags; 3890 u32 timinca; 3891 s32 ret_val; 3892 3893 if (!(adapter->flags & FLAG_HAS_HW_TIMESTAMP)) 3894 return; 3895 3896 if (info->adjfreq) { 3897 /* restore the previous ptp frequency delta */ 3898 ret_val = info->adjfreq(info, adapter->ptp_delta); 3899 } else { 3900 /* set the default base frequency if no adjustment possible */ 3901 ret_val = e1000e_get_base_timinca(adapter, &timinca); 3902 if (!ret_val) 3903 ew32(TIMINCA, timinca); 3904 } 3905 3906 if (ret_val) { 3907 dev_warn(&adapter->pdev->dev, 3908 "Failed to restore TIMINCA clock rate delta: %d\n", 3909 ret_val); 3910 return; 3911 } 3912 3913 /* reset the systim ns time counter */ 3914 spin_lock_irqsave(&adapter->systim_lock, flags); 3915 timecounter_init(&adapter->tc, &adapter->cc, 3916 ktime_to_ns(ktime_get_real())); 3917 spin_unlock_irqrestore(&adapter->systim_lock, flags); 3918 3919 /* restore the previous hwtstamp configuration settings */ 3920 e1000e_config_hwtstamp(adapter, &adapter->hwtstamp_config); 3921 } 3922 3923 /** 3924 * e1000e_reset - bring the hardware into a known good state 3925 * 3926 * This function boots the hardware and enables some settings that 3927 * require a configuration cycle of the hardware - those cannot be 3928 * set/changed during runtime. After reset the device needs to be 3929 * properly configured for Rx, Tx etc. 3930 */ 3931 void e1000e_reset(struct e1000_adapter *adapter) 3932 { 3933 struct e1000_mac_info *mac = &adapter->hw.mac; 3934 struct e1000_fc_info *fc = &adapter->hw.fc; 3935 struct e1000_hw *hw = &adapter->hw; 3936 u32 tx_space, min_tx_space, min_rx_space; 3937 u32 pba = adapter->pba; 3938 u16 hwm; 3939 3940 /* reset Packet Buffer Allocation to default */ 3941 ew32(PBA, pba); 3942 3943 if (adapter->max_frame_size > (VLAN_ETH_FRAME_LEN + ETH_FCS_LEN)) { 3944 /* To maintain wire speed transmits, the Tx FIFO should be 3945 * large enough to accommodate two full transmit packets, 3946 * rounded up to the next 1KB and expressed in KB. Likewise, 3947 * the Rx FIFO should be large enough to accommodate at least 3948 * one full receive packet and is similarly rounded up and 3949 * expressed in KB. 3950 */ 3951 pba = er32(PBA); 3952 /* upper 16 bits has Tx packet buffer allocation size in KB */ 3953 tx_space = pba >> 16; 3954 /* lower 16 bits has Rx packet buffer allocation size in KB */ 3955 pba &= 0xffff; 3956 /* the Tx fifo also stores 16 bytes of information about the Tx 3957 * but don't include ethernet FCS because hardware appends it 3958 */ 3959 min_tx_space = (adapter->max_frame_size + 3960 sizeof(struct e1000_tx_desc) - ETH_FCS_LEN) * 2; 3961 min_tx_space = ALIGN(min_tx_space, 1024); 3962 min_tx_space >>= 10; 3963 /* software strips receive CRC, so leave room for it */ 3964 min_rx_space = adapter->max_frame_size; 3965 min_rx_space = ALIGN(min_rx_space, 1024); 3966 min_rx_space >>= 10; 3967 3968 /* If current Tx allocation is less than the min Tx FIFO size, 3969 * and the min Tx FIFO size is less than the current Rx FIFO 3970 * allocation, take space away from current Rx allocation 3971 */ 3972 if ((tx_space < min_tx_space) && 3973 ((min_tx_space - tx_space) < pba)) { 3974 pba -= min_tx_space - tx_space; 3975 3976 /* if short on Rx space, Rx wins and must trump Tx 3977 * adjustment 3978 */ 3979 if (pba < min_rx_space) 3980 pba = min_rx_space; 3981 } 3982 3983 ew32(PBA, pba); 3984 } 3985 3986 /* flow control settings 3987 * 3988 * The high water mark must be low enough to fit one full frame 3989 * (or the size used for early receive) above it in the Rx FIFO. 3990 * Set it to the lower of: 3991 * - 90% of the Rx FIFO size, and 3992 * - the full Rx FIFO size minus one full frame 3993 */ 3994 if (adapter->flags & FLAG_DISABLE_FC_PAUSE_TIME) 3995 fc->pause_time = 0xFFFF; 3996 else 3997 fc->pause_time = E1000_FC_PAUSE_TIME; 3998 fc->send_xon = true; 3999 fc->current_mode = fc->requested_mode; 4000 4001 switch (hw->mac.type) { 4002 case e1000_ich9lan: 4003 case e1000_ich10lan: 4004 if (adapter->netdev->mtu > ETH_DATA_LEN) { 4005 pba = 14; 4006 ew32(PBA, pba); 4007 fc->high_water = 0x2800; 4008 fc->low_water = fc->high_water - 8; 4009 break; 4010 } 4011 /* fall-through */ 4012 default: 4013 hwm = min(((pba << 10) * 9 / 10), 4014 ((pba << 10) - adapter->max_frame_size)); 4015 4016 fc->high_water = hwm & E1000_FCRTH_RTH; /* 8-byte granularity */ 4017 fc->low_water = fc->high_water - 8; 4018 break; 4019 case e1000_pchlan: 4020 /* Workaround PCH LOM adapter hangs with certain network 4021 * loads. If hangs persist, try disabling Tx flow control. 4022 */ 4023 if (adapter->netdev->mtu > ETH_DATA_LEN) { 4024 fc->high_water = 0x3500; 4025 fc->low_water = 0x1500; 4026 } else { 4027 fc->high_water = 0x5000; 4028 fc->low_water = 0x3000; 4029 } 4030 fc->refresh_time = 0x1000; 4031 break; 4032 case e1000_pch2lan: 4033 case e1000_pch_lpt: 4034 case e1000_pch_spt: 4035 fc->refresh_time = 0x0400; 4036 4037 if (adapter->netdev->mtu <= ETH_DATA_LEN) { 4038 fc->high_water = 0x05C20; 4039 fc->low_water = 0x05048; 4040 fc->pause_time = 0x0650; 4041 break; 4042 } 4043 4044 pba = 14; 4045 ew32(PBA, pba); 4046 fc->high_water = ((pba << 10) * 9 / 10) & E1000_FCRTH_RTH; 4047 fc->low_water = ((pba << 10) * 8 / 10) & E1000_FCRTL_RTL; 4048 break; 4049 } 4050 4051 /* Alignment of Tx data is on an arbitrary byte boundary with the 4052 * maximum size per Tx descriptor limited only to the transmit 4053 * allocation of the packet buffer minus 96 bytes with an upper 4054 * limit of 24KB due to receive synchronization limitations. 4055 */ 4056 adapter->tx_fifo_limit = min_t(u32, ((er32(PBA) >> 16) << 10) - 96, 4057 24 << 10); 4058 4059 /* Disable Adaptive Interrupt Moderation if 2 full packets cannot 4060 * fit in receive buffer. 4061 */ 4062 if (adapter->itr_setting & 0x3) { 4063 if ((adapter->max_frame_size * 2) > (pba << 10)) { 4064 if (!(adapter->flags2 & FLAG2_DISABLE_AIM)) { 4065 dev_info(&adapter->pdev->dev, 4066 "Interrupt Throttle Rate off\n"); 4067 adapter->flags2 |= FLAG2_DISABLE_AIM; 4068 e1000e_write_itr(adapter, 0); 4069 } 4070 } else if (adapter->flags2 & FLAG2_DISABLE_AIM) { 4071 dev_info(&adapter->pdev->dev, 4072 "Interrupt Throttle Rate on\n"); 4073 adapter->flags2 &= ~FLAG2_DISABLE_AIM; 4074 adapter->itr = 20000; 4075 e1000e_write_itr(adapter, adapter->itr); 4076 } 4077 } 4078 4079 if (hw->mac.type == e1000_pch_spt) 4080 e1000_flush_desc_rings(adapter); 4081 /* Allow time for pending master requests to run */ 4082 mac->ops.reset_hw(hw); 4083 4084 /* For parts with AMT enabled, let the firmware know 4085 * that the network interface is in control 4086 */ 4087 if (adapter->flags & FLAG_HAS_AMT) 4088 e1000e_get_hw_control(adapter); 4089 4090 ew32(WUC, 0); 4091 4092 if (mac->ops.init_hw(hw)) 4093 e_err("Hardware Error\n"); 4094 4095 e1000_update_mng_vlan(adapter); 4096 4097 /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */ 4098 ew32(VET, ETH_P_8021Q); 4099 4100 e1000e_reset_adaptive(hw); 4101 4102 /* restore systim and hwtstamp settings */ 4103 e1000e_systim_reset(adapter); 4104 4105 /* Set EEE advertisement as appropriate */ 4106 if (adapter->flags2 & FLAG2_HAS_EEE) { 4107 s32 ret_val; 4108 u16 adv_addr; 4109 4110 switch (hw->phy.type) { 4111 case e1000_phy_82579: 4112 adv_addr = I82579_EEE_ADVERTISEMENT; 4113 break; 4114 case e1000_phy_i217: 4115 adv_addr = I217_EEE_ADVERTISEMENT; 4116 break; 4117 default: 4118 dev_err(&adapter->pdev->dev, 4119 "Invalid PHY type setting EEE advertisement\n"); 4120 return; 4121 } 4122 4123 ret_val = hw->phy.ops.acquire(hw); 4124 if (ret_val) { 4125 dev_err(&adapter->pdev->dev, 4126 "EEE advertisement - unable to acquire PHY\n"); 4127 return; 4128 } 4129 4130 e1000_write_emi_reg_locked(hw, adv_addr, 4131 hw->dev_spec.ich8lan.eee_disable ? 4132 0 : adapter->eee_advert); 4133 4134 hw->phy.ops.release(hw); 4135 } 4136 4137 if (!netif_running(adapter->netdev) && 4138 !test_bit(__E1000_TESTING, &adapter->state)) 4139 e1000_power_down_phy(adapter); 4140 4141 e1000_get_phy_info(hw); 4142 4143 if ((adapter->flags & FLAG_HAS_SMART_POWER_DOWN) && 4144 !(adapter->flags & FLAG_SMART_POWER_DOWN)) { 4145 u16 phy_data = 0; 4146 /* speed up time to link by disabling smart power down, ignore 4147 * the return value of this function because there is nothing 4148 * different we would do if it failed 4149 */ 4150 e1e_rphy(hw, IGP02E1000_PHY_POWER_MGMT, &phy_data); 4151 phy_data &= ~IGP02E1000_PM_SPD; 4152 e1e_wphy(hw, IGP02E1000_PHY_POWER_MGMT, phy_data); 4153 } 4154 if (hw->mac.type == e1000_pch_spt && adapter->int_mode == 0) { 4155 u32 reg; 4156 4157 /* Fextnvm7 @ 0xe4[2] = 1 */ 4158 reg = er32(FEXTNVM7); 4159 reg |= E1000_FEXTNVM7_SIDE_CLK_UNGATE; 4160 ew32(FEXTNVM7, reg); 4161 /* Fextnvm9 @ 0x5bb4[13:12] = 11 */ 4162 reg = er32(FEXTNVM9); 4163 reg |= E1000_FEXTNVM9_IOSFSB_CLKGATE_DIS | 4164 E1000_FEXTNVM9_IOSFSB_CLKREQ_DIS; 4165 ew32(FEXTNVM9, reg); 4166 } 4167 4168 } 4169 4170 /** 4171 * e1000e_trigger_lsc - trigger an LSC interrupt 4172 * @adapter: 4173 * 4174 * Fire a link status change interrupt to start the watchdog. 4175 **/ 4176 static void e1000e_trigger_lsc(struct e1000_adapter *adapter) 4177 { 4178 struct e1000_hw *hw = &adapter->hw; 4179 4180 if (adapter->msix_entries) 4181 ew32(ICS, E1000_ICS_OTHER); 4182 else 4183 ew32(ICS, E1000_ICS_LSC); 4184 } 4185 4186 void e1000e_up(struct e1000_adapter *adapter) 4187 { 4188 /* hardware has been reset, we need to reload some things */ 4189 e1000_configure(adapter); 4190 4191 clear_bit(__E1000_DOWN, &adapter->state); 4192 4193 if (adapter->msix_entries) 4194 e1000_configure_msix(adapter); 4195 e1000_irq_enable(adapter); 4196 4197 netif_start_queue(adapter->netdev); 4198 4199 e1000e_trigger_lsc(adapter); 4200 } 4201 4202 static void e1000e_flush_descriptors(struct e1000_adapter *adapter) 4203 { 4204 struct e1000_hw *hw = &adapter->hw; 4205 4206 if (!(adapter->flags2 & FLAG2_DMA_BURST)) 4207 return; 4208 4209 /* flush pending descriptor writebacks to memory */ 4210 ew32(TIDV, adapter->tx_int_delay | E1000_TIDV_FPD); 4211 ew32(RDTR, adapter->rx_int_delay | E1000_RDTR_FPD); 4212 4213 /* execute the writes immediately */ 4214 e1e_flush(); 4215 4216 /* due to rare timing issues, write to TIDV/RDTR again to ensure the 4217 * write is successful 4218 */ 4219 ew32(TIDV, adapter->tx_int_delay | E1000_TIDV_FPD); 4220 ew32(RDTR, adapter->rx_int_delay | E1000_RDTR_FPD); 4221 4222 /* execute the writes immediately */ 4223 e1e_flush(); 4224 } 4225 4226 static void e1000e_update_stats(struct e1000_adapter *adapter); 4227 4228 /** 4229 * e1000e_down - quiesce the device and optionally reset the hardware 4230 * @adapter: board private structure 4231 * @reset: boolean flag to reset the hardware or not 4232 */ 4233 void e1000e_down(struct e1000_adapter *adapter, bool reset) 4234 { 4235 struct net_device *netdev = adapter->netdev; 4236 struct e1000_hw *hw = &adapter->hw; 4237 u32 tctl, rctl; 4238 4239 /* signal that we're down so the interrupt handler does not 4240 * reschedule our watchdog timer 4241 */ 4242 set_bit(__E1000_DOWN, &adapter->state); 4243 4244 netif_carrier_off(netdev); 4245 4246 /* disable receives in the hardware */ 4247 rctl = er32(RCTL); 4248 if (!(adapter->flags2 & FLAG2_NO_DISABLE_RX)) 4249 ew32(RCTL, rctl & ~E1000_RCTL_EN); 4250 /* flush and sleep below */ 4251 4252 netif_stop_queue(netdev); 4253 4254 /* disable transmits in the hardware */ 4255 tctl = er32(TCTL); 4256 tctl &= ~E1000_TCTL_EN; 4257 ew32(TCTL, tctl); 4258 4259 /* flush both disables and wait for them to finish */ 4260 e1e_flush(); 4261 usleep_range(10000, 20000); 4262 4263 e1000_irq_disable(adapter); 4264 4265 napi_synchronize(&adapter->napi); 4266 4267 del_timer_sync(&adapter->watchdog_timer); 4268 del_timer_sync(&adapter->phy_info_timer); 4269 4270 spin_lock(&adapter->stats64_lock); 4271 e1000e_update_stats(adapter); 4272 spin_unlock(&adapter->stats64_lock); 4273 4274 e1000e_flush_descriptors(adapter); 4275 4276 adapter->link_speed = 0; 4277 adapter->link_duplex = 0; 4278 4279 /* Disable Si errata workaround on PCHx for jumbo frame flow */ 4280 if ((hw->mac.type >= e1000_pch2lan) && 4281 (adapter->netdev->mtu > ETH_DATA_LEN) && 4282 e1000_lv_jumbo_workaround_ich8lan(hw, false)) 4283 e_dbg("failed to disable jumbo frame workaround mode\n"); 4284 4285 if (!pci_channel_offline(adapter->pdev)) { 4286 if (reset) 4287 e1000e_reset(adapter); 4288 else if (hw->mac.type == e1000_pch_spt) 4289 e1000_flush_desc_rings(adapter); 4290 } 4291 e1000_clean_tx_ring(adapter->tx_ring); 4292 e1000_clean_rx_ring(adapter->rx_ring); 4293 } 4294 4295 void e1000e_reinit_locked(struct e1000_adapter *adapter) 4296 { 4297 might_sleep(); 4298 while (test_and_set_bit(__E1000_RESETTING, &adapter->state)) 4299 usleep_range(1000, 2000); 4300 e1000e_down(adapter, true); 4301 e1000e_up(adapter); 4302 clear_bit(__E1000_RESETTING, &adapter->state); 4303 } 4304 4305 /** 4306 * e1000e_sanitize_systim - sanitize raw cycle counter reads 4307 * @hw: pointer to the HW structure 4308 * @systim: time value read, sanitized and returned 4309 * 4310 * Errata for 82574/82583 possible bad bits read from SYSTIMH/L: 4311 * check to see that the time is incrementing at a reasonable 4312 * rate and is a multiple of incvalue. 4313 **/ 4314 static u64 e1000e_sanitize_systim(struct e1000_hw *hw, u64 systim) 4315 { 4316 u64 time_delta, rem, temp; 4317 u64 systim_next; 4318 u32 incvalue; 4319 int i; 4320 4321 incvalue = er32(TIMINCA) & E1000_TIMINCA_INCVALUE_MASK; 4322 for (i = 0; i < E1000_MAX_82574_SYSTIM_REREADS; i++) { 4323 /* latch SYSTIMH on read of SYSTIML */ 4324 systim_next = (u64)er32(SYSTIML); 4325 systim_next |= (u64)er32(SYSTIMH) << 32; 4326 4327 time_delta = systim_next - systim; 4328 temp = time_delta; 4329 /* VMWare users have seen incvalue of zero, don't div / 0 */ 4330 rem = incvalue ? do_div(temp, incvalue) : (time_delta != 0); 4331 4332 systim = systim_next; 4333 4334 if ((time_delta < E1000_82574_SYSTIM_EPSILON) && (rem == 0)) 4335 break; 4336 } 4337 4338 return systim; 4339 } 4340 4341 /** 4342 * e1000e_cyclecounter_read - read raw cycle counter (used by time counter) 4343 * @cc: cyclecounter structure 4344 **/ 4345 static u64 e1000e_cyclecounter_read(const struct cyclecounter *cc) 4346 { 4347 struct e1000_adapter *adapter = container_of(cc, struct e1000_adapter, 4348 cc); 4349 struct e1000_hw *hw = &adapter->hw; 4350 u32 systimel, systimeh; 4351 u64 systim; 4352 /* SYSTIMH latching upon SYSTIML read does not work well. 4353 * This means that if SYSTIML overflows after we read it but before 4354 * we read SYSTIMH, the value of SYSTIMH has been incremented and we 4355 * will experience a huge non linear increment in the systime value 4356 * to fix that we test for overflow and if true, we re-read systime. 4357 */ 4358 systimel = er32(SYSTIML); 4359 systimeh = er32(SYSTIMH); 4360 /* Is systimel is so large that overflow is possible? */ 4361 if (systimel >= (u32)0xffffffff - E1000_TIMINCA_INCVALUE_MASK) { 4362 u32 systimel_2 = er32(SYSTIML); 4363 if (systimel > systimel_2) { 4364 /* There was an overflow, read again SYSTIMH, and use 4365 * systimel_2 4366 */ 4367 systimeh = er32(SYSTIMH); 4368 systimel = systimel_2; 4369 } 4370 } 4371 systim = (u64)systimel; 4372 systim |= (u64)systimeh << 32; 4373 4374 if (adapter->flags2 & FLAG2_CHECK_SYSTIM_OVERFLOW) 4375 systim = e1000e_sanitize_systim(hw, systim); 4376 4377 return systim; 4378 } 4379 4380 /** 4381 * e1000_sw_init - Initialize general software structures (struct e1000_adapter) 4382 * @adapter: board private structure to initialize 4383 * 4384 * e1000_sw_init initializes the Adapter private data structure. 4385 * Fields are initialized based on PCI device information and 4386 * OS network device settings (MTU size). 4387 **/ 4388 static int e1000_sw_init(struct e1000_adapter *adapter) 4389 { 4390 struct net_device *netdev = adapter->netdev; 4391 4392 adapter->rx_buffer_len = VLAN_ETH_FRAME_LEN + ETH_FCS_LEN; 4393 adapter->rx_ps_bsize0 = 128; 4394 adapter->max_frame_size = netdev->mtu + VLAN_ETH_HLEN + ETH_FCS_LEN; 4395 adapter->min_frame_size = ETH_ZLEN + ETH_FCS_LEN; 4396 adapter->tx_ring_count = E1000_DEFAULT_TXD; 4397 adapter->rx_ring_count = E1000_DEFAULT_RXD; 4398 4399 spin_lock_init(&adapter->stats64_lock); 4400 4401 e1000e_set_interrupt_capability(adapter); 4402 4403 if (e1000_alloc_queues(adapter)) 4404 return -ENOMEM; 4405 4406 /* Setup hardware time stamping cyclecounter */ 4407 if (adapter->flags & FLAG_HAS_HW_TIMESTAMP) { 4408 adapter->cc.read = e1000e_cyclecounter_read; 4409 adapter->cc.mask = CYCLECOUNTER_MASK(64); 4410 adapter->cc.mult = 1; 4411 /* cc.shift set in e1000e_get_base_tininca() */ 4412 4413 spin_lock_init(&adapter->systim_lock); 4414 INIT_WORK(&adapter->tx_hwtstamp_work, e1000e_tx_hwtstamp_work); 4415 } 4416 4417 /* Explicitly disable IRQ since the NIC can be in any state. */ 4418 e1000_irq_disable(adapter); 4419 4420 set_bit(__E1000_DOWN, &adapter->state); 4421 return 0; 4422 } 4423 4424 /** 4425 * e1000_intr_msi_test - Interrupt Handler 4426 * @irq: interrupt number 4427 * @data: pointer to a network interface device structure 4428 **/ 4429 static irqreturn_t e1000_intr_msi_test(int __always_unused irq, void *data) 4430 { 4431 struct net_device *netdev = data; 4432 struct e1000_adapter *adapter = netdev_priv(netdev); 4433 struct e1000_hw *hw = &adapter->hw; 4434 u32 icr = er32(ICR); 4435 4436 e_dbg("icr is %08X\n", icr); 4437 if (icr & E1000_ICR_RXSEQ) { 4438 adapter->flags &= ~FLAG_MSI_TEST_FAILED; 4439 /* Force memory writes to complete before acknowledging the 4440 * interrupt is handled. 4441 */ 4442 wmb(); 4443 } 4444 4445 return IRQ_HANDLED; 4446 } 4447 4448 /** 4449 * e1000_test_msi_interrupt - Returns 0 for successful test 4450 * @adapter: board private struct 4451 * 4452 * code flow taken from tg3.c 4453 **/ 4454 static int e1000_test_msi_interrupt(struct e1000_adapter *adapter) 4455 { 4456 struct net_device *netdev = adapter->netdev; 4457 struct e1000_hw *hw = &adapter->hw; 4458 int err; 4459 4460 /* poll_enable hasn't been called yet, so don't need disable */ 4461 /* clear any pending events */ 4462 er32(ICR); 4463 4464 /* free the real vector and request a test handler */ 4465 e1000_free_irq(adapter); 4466 e1000e_reset_interrupt_capability(adapter); 4467 4468 /* Assume that the test fails, if it succeeds then the test 4469 * MSI irq handler will unset this flag 4470 */ 4471 adapter->flags |= FLAG_MSI_TEST_FAILED; 4472 4473 err = pci_enable_msi(adapter->pdev); 4474 if (err) 4475 goto msi_test_failed; 4476 4477 err = request_irq(adapter->pdev->irq, e1000_intr_msi_test, 0, 4478 netdev->name, netdev); 4479 if (err) { 4480 pci_disable_msi(adapter->pdev); 4481 goto msi_test_failed; 4482 } 4483 4484 /* Force memory writes to complete before enabling and firing an 4485 * interrupt. 4486 */ 4487 wmb(); 4488 4489 e1000_irq_enable(adapter); 4490 4491 /* fire an unusual interrupt on the test handler */ 4492 ew32(ICS, E1000_ICS_RXSEQ); 4493 e1e_flush(); 4494 msleep(100); 4495 4496 e1000_irq_disable(adapter); 4497 4498 rmb(); /* read flags after interrupt has been fired */ 4499 4500 if (adapter->flags & FLAG_MSI_TEST_FAILED) { 4501 adapter->int_mode = E1000E_INT_MODE_LEGACY; 4502 e_info("MSI interrupt test failed, using legacy interrupt.\n"); 4503 } else { 4504 e_dbg("MSI interrupt test succeeded!\n"); 4505 } 4506 4507 free_irq(adapter->pdev->irq, netdev); 4508 pci_disable_msi(adapter->pdev); 4509 4510 msi_test_failed: 4511 e1000e_set_interrupt_capability(adapter); 4512 return e1000_request_irq(adapter); 4513 } 4514 4515 /** 4516 * e1000_test_msi - Returns 0 if MSI test succeeds or INTx mode is restored 4517 * @adapter: board private struct 4518 * 4519 * code flow taken from tg3.c, called with e1000 interrupts disabled. 4520 **/ 4521 static int e1000_test_msi(struct e1000_adapter *adapter) 4522 { 4523 int err; 4524 u16 pci_cmd; 4525 4526 if (!(adapter->flags & FLAG_MSI_ENABLED)) 4527 return 0; 4528 4529 /* disable SERR in case the MSI write causes a master abort */ 4530 pci_read_config_word(adapter->pdev, PCI_COMMAND, &pci_cmd); 4531 if (pci_cmd & PCI_COMMAND_SERR) 4532 pci_write_config_word(adapter->pdev, PCI_COMMAND, 4533 pci_cmd & ~PCI_COMMAND_SERR); 4534 4535 err = e1000_test_msi_interrupt(adapter); 4536 4537 /* re-enable SERR */ 4538 if (pci_cmd & PCI_COMMAND_SERR) { 4539 pci_read_config_word(adapter->pdev, PCI_COMMAND, &pci_cmd); 4540 pci_cmd |= PCI_COMMAND_SERR; 4541 pci_write_config_word(adapter->pdev, PCI_COMMAND, pci_cmd); 4542 } 4543 4544 return err; 4545 } 4546 4547 /** 4548 * e1000e_open - Called when a network interface is made active 4549 * @netdev: network interface device structure 4550 * 4551 * Returns 0 on success, negative value on failure 4552 * 4553 * The open entry point is called when a network interface is made 4554 * active by the system (IFF_UP). At this point all resources needed 4555 * for transmit and receive operations are allocated, the interrupt 4556 * handler is registered with the OS, the watchdog timer is started, 4557 * and the stack is notified that the interface is ready. 4558 **/ 4559 int e1000e_open(struct net_device *netdev) 4560 { 4561 struct e1000_adapter *adapter = netdev_priv(netdev); 4562 struct e1000_hw *hw = &adapter->hw; 4563 struct pci_dev *pdev = adapter->pdev; 4564 int err; 4565 4566 /* disallow open during test */ 4567 if (test_bit(__E1000_TESTING, &adapter->state)) 4568 return -EBUSY; 4569 4570 pm_runtime_get_sync(&pdev->dev); 4571 4572 netif_carrier_off(netdev); 4573 4574 /* allocate transmit descriptors */ 4575 err = e1000e_setup_tx_resources(adapter->tx_ring); 4576 if (err) 4577 goto err_setup_tx; 4578 4579 /* allocate receive descriptors */ 4580 err = e1000e_setup_rx_resources(adapter->rx_ring); 4581 if (err) 4582 goto err_setup_rx; 4583 4584 /* If AMT is enabled, let the firmware know that the network 4585 * interface is now open and reset the part to a known state. 4586 */ 4587 if (adapter->flags & FLAG_HAS_AMT) { 4588 e1000e_get_hw_control(adapter); 4589 e1000e_reset(adapter); 4590 } 4591 4592 e1000e_power_up_phy(adapter); 4593 4594 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE; 4595 if ((adapter->hw.mng_cookie.status & E1000_MNG_DHCP_COOKIE_STATUS_VLAN)) 4596 e1000_update_mng_vlan(adapter); 4597 4598 /* DMA latency requirement to workaround jumbo issue */ 4599 pm_qos_add_request(&adapter->pm_qos_req, PM_QOS_CPU_DMA_LATENCY, 4600 PM_QOS_DEFAULT_VALUE); 4601 4602 /* before we allocate an interrupt, we must be ready to handle it. 4603 * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt 4604 * as soon as we call pci_request_irq, so we have to setup our 4605 * clean_rx handler before we do so. 4606 */ 4607 e1000_configure(adapter); 4608 4609 err = e1000_request_irq(adapter); 4610 if (err) 4611 goto err_req_irq; 4612 4613 /* Work around PCIe errata with MSI interrupts causing some chipsets to 4614 * ignore e1000e MSI messages, which means we need to test our MSI 4615 * interrupt now 4616 */ 4617 if (adapter->int_mode != E1000E_INT_MODE_LEGACY) { 4618 err = e1000_test_msi(adapter); 4619 if (err) { 4620 e_err("Interrupt allocation failed\n"); 4621 goto err_req_irq; 4622 } 4623 } 4624 4625 /* From here on the code is the same as e1000e_up() */ 4626 clear_bit(__E1000_DOWN, &adapter->state); 4627 4628 napi_enable(&adapter->napi); 4629 4630 e1000_irq_enable(adapter); 4631 4632 adapter->tx_hang_recheck = false; 4633 netif_start_queue(netdev); 4634 4635 hw->mac.get_link_status = true; 4636 pm_runtime_put(&pdev->dev); 4637 4638 e1000e_trigger_lsc(adapter); 4639 4640 return 0; 4641 4642 err_req_irq: 4643 pm_qos_remove_request(&adapter->pm_qos_req); 4644 e1000e_release_hw_control(adapter); 4645 e1000_power_down_phy(adapter); 4646 e1000e_free_rx_resources(adapter->rx_ring); 4647 err_setup_rx: 4648 e1000e_free_tx_resources(adapter->tx_ring); 4649 err_setup_tx: 4650 e1000e_reset(adapter); 4651 pm_runtime_put_sync(&pdev->dev); 4652 4653 return err; 4654 } 4655 4656 /** 4657 * e1000e_close - Disables a network interface 4658 * @netdev: network interface device structure 4659 * 4660 * Returns 0, this is not allowed to fail 4661 * 4662 * The close entry point is called when an interface is de-activated 4663 * by the OS. The hardware is still under the drivers control, but 4664 * needs to be disabled. A global MAC reset is issued to stop the 4665 * hardware, and all transmit and receive resources are freed. 4666 **/ 4667 int e1000e_close(struct net_device *netdev) 4668 { 4669 struct e1000_adapter *adapter = netdev_priv(netdev); 4670 struct pci_dev *pdev = adapter->pdev; 4671 int count = E1000_CHECK_RESET_COUNT; 4672 4673 while (test_bit(__E1000_RESETTING, &adapter->state) && count--) 4674 usleep_range(10000, 20000); 4675 4676 WARN_ON(test_bit(__E1000_RESETTING, &adapter->state)); 4677 4678 pm_runtime_get_sync(&pdev->dev); 4679 4680 if (!test_bit(__E1000_DOWN, &adapter->state)) { 4681 e1000e_down(adapter, true); 4682 e1000_free_irq(adapter); 4683 4684 /* Link status message must follow this format */ 4685 pr_info("%s NIC Link is Down\n", adapter->netdev->name); 4686 } 4687 4688 napi_disable(&adapter->napi); 4689 4690 e1000e_free_tx_resources(adapter->tx_ring); 4691 e1000e_free_rx_resources(adapter->rx_ring); 4692 4693 /* kill manageability vlan ID if supported, but not if a vlan with 4694 * the same ID is registered on the host OS (let 8021q kill it) 4695 */ 4696 if (adapter->hw.mng_cookie.status & E1000_MNG_DHCP_COOKIE_STATUS_VLAN) 4697 e1000_vlan_rx_kill_vid(netdev, htons(ETH_P_8021Q), 4698 adapter->mng_vlan_id); 4699 4700 /* If AMT is enabled, let the firmware know that the network 4701 * interface is now closed 4702 */ 4703 if ((adapter->flags & FLAG_HAS_AMT) && 4704 !test_bit(__E1000_TESTING, &adapter->state)) 4705 e1000e_release_hw_control(adapter); 4706 4707 pm_qos_remove_request(&adapter->pm_qos_req); 4708 4709 pm_runtime_put_sync(&pdev->dev); 4710 4711 return 0; 4712 } 4713 4714 /** 4715 * e1000_set_mac - Change the Ethernet Address of the NIC 4716 * @netdev: network interface device structure 4717 * @p: pointer to an address structure 4718 * 4719 * Returns 0 on success, negative on failure 4720 **/ 4721 static int e1000_set_mac(struct net_device *netdev, void *p) 4722 { 4723 struct e1000_adapter *adapter = netdev_priv(netdev); 4724 struct e1000_hw *hw = &adapter->hw; 4725 struct sockaddr *addr = p; 4726 4727 if (!is_valid_ether_addr(addr->sa_data)) 4728 return -EADDRNOTAVAIL; 4729 4730 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len); 4731 memcpy(adapter->hw.mac.addr, addr->sa_data, netdev->addr_len); 4732 4733 hw->mac.ops.rar_set(&adapter->hw, adapter->hw.mac.addr, 0); 4734 4735 if (adapter->flags & FLAG_RESET_OVERWRITES_LAA) { 4736 /* activate the work around */ 4737 e1000e_set_laa_state_82571(&adapter->hw, 1); 4738 4739 /* Hold a copy of the LAA in RAR[14] This is done so that 4740 * between the time RAR[0] gets clobbered and the time it 4741 * gets fixed (in e1000_watchdog), the actual LAA is in one 4742 * of the RARs and no incoming packets directed to this port 4743 * are dropped. Eventually the LAA will be in RAR[0] and 4744 * RAR[14] 4745 */ 4746 hw->mac.ops.rar_set(&adapter->hw, adapter->hw.mac.addr, 4747 adapter->hw.mac.rar_entry_count - 1); 4748 } 4749 4750 return 0; 4751 } 4752 4753 /** 4754 * e1000e_update_phy_task - work thread to update phy 4755 * @work: pointer to our work struct 4756 * 4757 * this worker thread exists because we must acquire a 4758 * semaphore to read the phy, which we could msleep while 4759 * waiting for it, and we can't msleep in a timer. 4760 **/ 4761 static void e1000e_update_phy_task(struct work_struct *work) 4762 { 4763 struct e1000_adapter *adapter = container_of(work, 4764 struct e1000_adapter, 4765 update_phy_task); 4766 struct e1000_hw *hw = &adapter->hw; 4767 4768 if (test_bit(__E1000_DOWN, &adapter->state)) 4769 return; 4770 4771 e1000_get_phy_info(hw); 4772 4773 /* Enable EEE on 82579 after link up */ 4774 if (hw->phy.type >= e1000_phy_82579) 4775 e1000_set_eee_pchlan(hw); 4776 } 4777 4778 /** 4779 * e1000_update_phy_info - timre call-back to update PHY info 4780 * @data: pointer to adapter cast into an unsigned long 4781 * 4782 * Need to wait a few seconds after link up to get diagnostic information from 4783 * the phy 4784 **/ 4785 static void e1000_update_phy_info(unsigned long data) 4786 { 4787 struct e1000_adapter *adapter = (struct e1000_adapter *)data; 4788 4789 if (test_bit(__E1000_DOWN, &adapter->state)) 4790 return; 4791 4792 schedule_work(&adapter->update_phy_task); 4793 } 4794 4795 /** 4796 * e1000e_update_phy_stats - Update the PHY statistics counters 4797 * @adapter: board private structure 4798 * 4799 * Read/clear the upper 16-bit PHY registers and read/accumulate lower 4800 **/ 4801 static void e1000e_update_phy_stats(struct e1000_adapter *adapter) 4802 { 4803 struct e1000_hw *hw = &adapter->hw; 4804 s32 ret_val; 4805 u16 phy_data; 4806 4807 ret_val = hw->phy.ops.acquire(hw); 4808 if (ret_val) 4809 return; 4810 4811 /* A page set is expensive so check if already on desired page. 4812 * If not, set to the page with the PHY status registers. 4813 */ 4814 hw->phy.addr = 1; 4815 ret_val = e1000e_read_phy_reg_mdic(hw, IGP01E1000_PHY_PAGE_SELECT, 4816 &phy_data); 4817 if (ret_val) 4818 goto release; 4819 if (phy_data != (HV_STATS_PAGE << IGP_PAGE_SHIFT)) { 4820 ret_val = hw->phy.ops.set_page(hw, 4821 HV_STATS_PAGE << IGP_PAGE_SHIFT); 4822 if (ret_val) 4823 goto release; 4824 } 4825 4826 /* Single Collision Count */ 4827 hw->phy.ops.read_reg_page(hw, HV_SCC_UPPER, &phy_data); 4828 ret_val = hw->phy.ops.read_reg_page(hw, HV_SCC_LOWER, &phy_data); 4829 if (!ret_val) 4830 adapter->stats.scc += phy_data; 4831 4832 /* Excessive Collision Count */ 4833 hw->phy.ops.read_reg_page(hw, HV_ECOL_UPPER, &phy_data); 4834 ret_val = hw->phy.ops.read_reg_page(hw, HV_ECOL_LOWER, &phy_data); 4835 if (!ret_val) 4836 adapter->stats.ecol += phy_data; 4837 4838 /* Multiple Collision Count */ 4839 hw->phy.ops.read_reg_page(hw, HV_MCC_UPPER, &phy_data); 4840 ret_val = hw->phy.ops.read_reg_page(hw, HV_MCC_LOWER, &phy_data); 4841 if (!ret_val) 4842 adapter->stats.mcc += phy_data; 4843 4844 /* Late Collision Count */ 4845 hw->phy.ops.read_reg_page(hw, HV_LATECOL_UPPER, &phy_data); 4846 ret_val = hw->phy.ops.read_reg_page(hw, HV_LATECOL_LOWER, &phy_data); 4847 if (!ret_val) 4848 adapter->stats.latecol += phy_data; 4849 4850 /* Collision Count - also used for adaptive IFS */ 4851 hw->phy.ops.read_reg_page(hw, HV_COLC_UPPER, &phy_data); 4852 ret_val = hw->phy.ops.read_reg_page(hw, HV_COLC_LOWER, &phy_data); 4853 if (!ret_val) 4854 hw->mac.collision_delta = phy_data; 4855 4856 /* Defer Count */ 4857 hw->phy.ops.read_reg_page(hw, HV_DC_UPPER, &phy_data); 4858 ret_val = hw->phy.ops.read_reg_page(hw, HV_DC_LOWER, &phy_data); 4859 if (!ret_val) 4860 adapter->stats.dc += phy_data; 4861 4862 /* Transmit with no CRS */ 4863 hw->phy.ops.read_reg_page(hw, HV_TNCRS_UPPER, &phy_data); 4864 ret_val = hw->phy.ops.read_reg_page(hw, HV_TNCRS_LOWER, &phy_data); 4865 if (!ret_val) 4866 adapter->stats.tncrs += phy_data; 4867 4868 release: 4869 hw->phy.ops.release(hw); 4870 } 4871 4872 /** 4873 * e1000e_update_stats - Update the board statistics counters 4874 * @adapter: board private structure 4875 **/ 4876 static void e1000e_update_stats(struct e1000_adapter *adapter) 4877 { 4878 struct net_device *netdev = adapter->netdev; 4879 struct e1000_hw *hw = &adapter->hw; 4880 struct pci_dev *pdev = adapter->pdev; 4881 4882 /* Prevent stats update while adapter is being reset, or if the pci 4883 * connection is down. 4884 */ 4885 if (adapter->link_speed == 0) 4886 return; 4887 if (pci_channel_offline(pdev)) 4888 return; 4889 4890 adapter->stats.crcerrs += er32(CRCERRS); 4891 adapter->stats.gprc += er32(GPRC); 4892 adapter->stats.gorc += er32(GORCL); 4893 er32(GORCH); /* Clear gorc */ 4894 adapter->stats.bprc += er32(BPRC); 4895 adapter->stats.mprc += er32(MPRC); 4896 adapter->stats.roc += er32(ROC); 4897 4898 adapter->stats.mpc += er32(MPC); 4899 4900 /* Half-duplex statistics */ 4901 if (adapter->link_duplex == HALF_DUPLEX) { 4902 if (adapter->flags2 & FLAG2_HAS_PHY_STATS) { 4903 e1000e_update_phy_stats(adapter); 4904 } else { 4905 adapter->stats.scc += er32(SCC); 4906 adapter->stats.ecol += er32(ECOL); 4907 adapter->stats.mcc += er32(MCC); 4908 adapter->stats.latecol += er32(LATECOL); 4909 adapter->stats.dc += er32(DC); 4910 4911 hw->mac.collision_delta = er32(COLC); 4912 4913 if ((hw->mac.type != e1000_82574) && 4914 (hw->mac.type != e1000_82583)) 4915 adapter->stats.tncrs += er32(TNCRS); 4916 } 4917 adapter->stats.colc += hw->mac.collision_delta; 4918 } 4919 4920 adapter->stats.xonrxc += er32(XONRXC); 4921 adapter->stats.xontxc += er32(XONTXC); 4922 adapter->stats.xoffrxc += er32(XOFFRXC); 4923 adapter->stats.xofftxc += er32(XOFFTXC); 4924 adapter->stats.gptc += er32(GPTC); 4925 adapter->stats.gotc += er32(GOTCL); 4926 er32(GOTCH); /* Clear gotc */ 4927 adapter->stats.rnbc += er32(RNBC); 4928 adapter->stats.ruc += er32(RUC); 4929 4930 adapter->stats.mptc += er32(MPTC); 4931 adapter->stats.bptc += er32(BPTC); 4932 4933 /* used for adaptive IFS */ 4934 4935 hw->mac.tx_packet_delta = er32(TPT); 4936 adapter->stats.tpt += hw->mac.tx_packet_delta; 4937 4938 adapter->stats.algnerrc += er32(ALGNERRC); 4939 adapter->stats.rxerrc += er32(RXERRC); 4940 adapter->stats.cexterr += er32(CEXTERR); 4941 adapter->stats.tsctc += er32(TSCTC); 4942 adapter->stats.tsctfc += er32(TSCTFC); 4943 4944 /* Fill out the OS statistics structure */ 4945 netdev->stats.multicast = adapter->stats.mprc; 4946 netdev->stats.collisions = adapter->stats.colc; 4947 4948 /* Rx Errors */ 4949 4950 /* RLEC on some newer hardware can be incorrect so build 4951 * our own version based on RUC and ROC 4952 */ 4953 netdev->stats.rx_errors = adapter->stats.rxerrc + 4954 adapter->stats.crcerrs + adapter->stats.algnerrc + 4955 adapter->stats.ruc + adapter->stats.roc + adapter->stats.cexterr; 4956 netdev->stats.rx_length_errors = adapter->stats.ruc + 4957 adapter->stats.roc; 4958 netdev->stats.rx_crc_errors = adapter->stats.crcerrs; 4959 netdev->stats.rx_frame_errors = adapter->stats.algnerrc; 4960 netdev->stats.rx_missed_errors = adapter->stats.mpc; 4961 4962 /* Tx Errors */ 4963 netdev->stats.tx_errors = adapter->stats.ecol + adapter->stats.latecol; 4964 netdev->stats.tx_aborted_errors = adapter->stats.ecol; 4965 netdev->stats.tx_window_errors = adapter->stats.latecol; 4966 netdev->stats.tx_carrier_errors = adapter->stats.tncrs; 4967 4968 /* Tx Dropped needs to be maintained elsewhere */ 4969 4970 /* Management Stats */ 4971 adapter->stats.mgptc += er32(MGTPTC); 4972 adapter->stats.mgprc += er32(MGTPRC); 4973 adapter->stats.mgpdc += er32(MGTPDC); 4974 4975 /* Correctable ECC Errors */ 4976 if ((hw->mac.type == e1000_pch_lpt) || 4977 (hw->mac.type == e1000_pch_spt)) { 4978 u32 pbeccsts = er32(PBECCSTS); 4979 4980 adapter->corr_errors += 4981 pbeccsts & E1000_PBECCSTS_CORR_ERR_CNT_MASK; 4982 adapter->uncorr_errors += 4983 (pbeccsts & E1000_PBECCSTS_UNCORR_ERR_CNT_MASK) >> 4984 E1000_PBECCSTS_UNCORR_ERR_CNT_SHIFT; 4985 } 4986 } 4987 4988 /** 4989 * e1000_phy_read_status - Update the PHY register status snapshot 4990 * @adapter: board private structure 4991 **/ 4992 static void e1000_phy_read_status(struct e1000_adapter *adapter) 4993 { 4994 struct e1000_hw *hw = &adapter->hw; 4995 struct e1000_phy_regs *phy = &adapter->phy_regs; 4996 4997 if (!pm_runtime_suspended((&adapter->pdev->dev)->parent) && 4998 (er32(STATUS) & E1000_STATUS_LU) && 4999 (adapter->hw.phy.media_type == e1000_media_type_copper)) { 5000 int ret_val; 5001 5002 ret_val = e1e_rphy(hw, MII_BMCR, &phy->bmcr); 5003 ret_val |= e1e_rphy(hw, MII_BMSR, &phy->bmsr); 5004 ret_val |= e1e_rphy(hw, MII_ADVERTISE, &phy->advertise); 5005 ret_val |= e1e_rphy(hw, MII_LPA, &phy->lpa); 5006 ret_val |= e1e_rphy(hw, MII_EXPANSION, &phy->expansion); 5007 ret_val |= e1e_rphy(hw, MII_CTRL1000, &phy->ctrl1000); 5008 ret_val |= e1e_rphy(hw, MII_STAT1000, &phy->stat1000); 5009 ret_val |= e1e_rphy(hw, MII_ESTATUS, &phy->estatus); 5010 if (ret_val) 5011 e_warn("Error reading PHY register\n"); 5012 } else { 5013 /* Do not read PHY registers if link is not up 5014 * Set values to typical power-on defaults 5015 */ 5016 phy->bmcr = (BMCR_SPEED1000 | BMCR_ANENABLE | BMCR_FULLDPLX); 5017 phy->bmsr = (BMSR_100FULL | BMSR_100HALF | BMSR_10FULL | 5018 BMSR_10HALF | BMSR_ESTATEN | BMSR_ANEGCAPABLE | 5019 BMSR_ERCAP); 5020 phy->advertise = (ADVERTISE_PAUSE_ASYM | ADVERTISE_PAUSE_CAP | 5021 ADVERTISE_ALL | ADVERTISE_CSMA); 5022 phy->lpa = 0; 5023 phy->expansion = EXPANSION_ENABLENPAGE; 5024 phy->ctrl1000 = ADVERTISE_1000FULL; 5025 phy->stat1000 = 0; 5026 phy->estatus = (ESTATUS_1000_TFULL | ESTATUS_1000_THALF); 5027 } 5028 } 5029 5030 static void e1000_print_link_info(struct e1000_adapter *adapter) 5031 { 5032 struct e1000_hw *hw = &adapter->hw; 5033 u32 ctrl = er32(CTRL); 5034 5035 /* Link status message must follow this format for user tools */ 5036 pr_info("%s NIC Link is Up %d Mbps %s Duplex, Flow Control: %s\n", 5037 adapter->netdev->name, adapter->link_speed, 5038 adapter->link_duplex == FULL_DUPLEX ? "Full" : "Half", 5039 (ctrl & E1000_CTRL_TFCE) && (ctrl & E1000_CTRL_RFCE) ? "Rx/Tx" : 5040 (ctrl & E1000_CTRL_RFCE) ? "Rx" : 5041 (ctrl & E1000_CTRL_TFCE) ? "Tx" : "None"); 5042 } 5043 5044 static bool e1000e_has_link(struct e1000_adapter *adapter) 5045 { 5046 struct e1000_hw *hw = &adapter->hw; 5047 bool link_active = false; 5048 s32 ret_val = 0; 5049 5050 /* get_link_status is set on LSC (link status) interrupt or 5051 * Rx sequence error interrupt. get_link_status will stay 5052 * false until the check_for_link establishes link 5053 * for copper adapters ONLY 5054 */ 5055 switch (hw->phy.media_type) { 5056 case e1000_media_type_copper: 5057 if (hw->mac.get_link_status) { 5058 ret_val = hw->mac.ops.check_for_link(hw); 5059 link_active = !hw->mac.get_link_status; 5060 } else { 5061 link_active = true; 5062 } 5063 break; 5064 case e1000_media_type_fiber: 5065 ret_val = hw->mac.ops.check_for_link(hw); 5066 link_active = !!(er32(STATUS) & E1000_STATUS_LU); 5067 break; 5068 case e1000_media_type_internal_serdes: 5069 ret_val = hw->mac.ops.check_for_link(hw); 5070 link_active = adapter->hw.mac.serdes_has_link; 5071 break; 5072 default: 5073 case e1000_media_type_unknown: 5074 break; 5075 } 5076 5077 if ((ret_val == E1000_ERR_PHY) && (hw->phy.type == e1000_phy_igp_3) && 5078 (er32(CTRL) & E1000_PHY_CTRL_GBE_DISABLE)) { 5079 /* See e1000_kmrn_lock_loss_workaround_ich8lan() */ 5080 e_info("Gigabit has been disabled, downgrading speed\n"); 5081 } 5082 5083 return link_active; 5084 } 5085 5086 static void e1000e_enable_receives(struct e1000_adapter *adapter) 5087 { 5088 /* make sure the receive unit is started */ 5089 if ((adapter->flags & FLAG_RX_NEEDS_RESTART) && 5090 (adapter->flags & FLAG_RESTART_NOW)) { 5091 struct e1000_hw *hw = &adapter->hw; 5092 u32 rctl = er32(RCTL); 5093 5094 ew32(RCTL, rctl | E1000_RCTL_EN); 5095 adapter->flags &= ~FLAG_RESTART_NOW; 5096 } 5097 } 5098 5099 static void e1000e_check_82574_phy_workaround(struct e1000_adapter *adapter) 5100 { 5101 struct e1000_hw *hw = &adapter->hw; 5102 5103 /* With 82574 controllers, PHY needs to be checked periodically 5104 * for hung state and reset, if two calls return true 5105 */ 5106 if (e1000_check_phy_82574(hw)) 5107 adapter->phy_hang_count++; 5108 else 5109 adapter->phy_hang_count = 0; 5110 5111 if (adapter->phy_hang_count > 1) { 5112 adapter->phy_hang_count = 0; 5113 e_dbg("PHY appears hung - resetting\n"); 5114 schedule_work(&adapter->reset_task); 5115 } 5116 } 5117 5118 /** 5119 * e1000_watchdog - Timer Call-back 5120 * @data: pointer to adapter cast into an unsigned long 5121 **/ 5122 static void e1000_watchdog(unsigned long data) 5123 { 5124 struct e1000_adapter *adapter = (struct e1000_adapter *)data; 5125 5126 /* Do the rest outside of interrupt context */ 5127 schedule_work(&adapter->watchdog_task); 5128 5129 /* TODO: make this use queue_delayed_work() */ 5130 } 5131 5132 static void e1000_watchdog_task(struct work_struct *work) 5133 { 5134 struct e1000_adapter *adapter = container_of(work, 5135 struct e1000_adapter, 5136 watchdog_task); 5137 struct net_device *netdev = adapter->netdev; 5138 struct e1000_mac_info *mac = &adapter->hw.mac; 5139 struct e1000_phy_info *phy = &adapter->hw.phy; 5140 struct e1000_ring *tx_ring = adapter->tx_ring; 5141 struct e1000_hw *hw = &adapter->hw; 5142 u32 link, tctl; 5143 5144 if (test_bit(__E1000_DOWN, &adapter->state)) 5145 return; 5146 5147 link = e1000e_has_link(adapter); 5148 if ((netif_carrier_ok(netdev)) && link) { 5149 /* Cancel scheduled suspend requests. */ 5150 pm_runtime_resume(netdev->dev.parent); 5151 5152 e1000e_enable_receives(adapter); 5153 goto link_up; 5154 } 5155 5156 if ((e1000e_enable_tx_pkt_filtering(hw)) && 5157 (adapter->mng_vlan_id != adapter->hw.mng_cookie.vlan_id)) 5158 e1000_update_mng_vlan(adapter); 5159 5160 if (link) { 5161 if (!netif_carrier_ok(netdev)) { 5162 bool txb2b = true; 5163 5164 /* Cancel scheduled suspend requests. */ 5165 pm_runtime_resume(netdev->dev.parent); 5166 5167 /* update snapshot of PHY registers on LSC */ 5168 e1000_phy_read_status(adapter); 5169 mac->ops.get_link_up_info(&adapter->hw, 5170 &adapter->link_speed, 5171 &adapter->link_duplex); 5172 e1000_print_link_info(adapter); 5173 5174 /* check if SmartSpeed worked */ 5175 e1000e_check_downshift(hw); 5176 if (phy->speed_downgraded) 5177 netdev_warn(netdev, 5178 "Link Speed was downgraded by SmartSpeed\n"); 5179 5180 /* On supported PHYs, check for duplex mismatch only 5181 * if link has autonegotiated at 10/100 half 5182 */ 5183 if ((hw->phy.type == e1000_phy_igp_3 || 5184 hw->phy.type == e1000_phy_bm) && 5185 hw->mac.autoneg && 5186 (adapter->link_speed == SPEED_10 || 5187 adapter->link_speed == SPEED_100) && 5188 (adapter->link_duplex == HALF_DUPLEX)) { 5189 u16 autoneg_exp; 5190 5191 e1e_rphy(hw, MII_EXPANSION, &autoneg_exp); 5192 5193 if (!(autoneg_exp & EXPANSION_NWAY)) 5194 e_info("Autonegotiated half duplex but link partner cannot autoneg. Try forcing full duplex if link gets many collisions.\n"); 5195 } 5196 5197 /* adjust timeout factor according to speed/duplex */ 5198 adapter->tx_timeout_factor = 1; 5199 switch (adapter->link_speed) { 5200 case SPEED_10: 5201 txb2b = false; 5202 adapter->tx_timeout_factor = 16; 5203 break; 5204 case SPEED_100: 5205 txb2b = false; 5206 adapter->tx_timeout_factor = 10; 5207 break; 5208 } 5209 5210 /* workaround: re-program speed mode bit after 5211 * link-up event 5212 */ 5213 if ((adapter->flags & FLAG_TARC_SPEED_MODE_BIT) && 5214 !txb2b) { 5215 u32 tarc0; 5216 5217 tarc0 = er32(TARC(0)); 5218 tarc0 &= ~SPEED_MODE_BIT; 5219 ew32(TARC(0), tarc0); 5220 } 5221 5222 /* disable TSO for pcie and 10/100 speeds, to avoid 5223 * some hardware issues 5224 */ 5225 if (!(adapter->flags & FLAG_TSO_FORCE)) { 5226 switch (adapter->link_speed) { 5227 case SPEED_10: 5228 case SPEED_100: 5229 e_info("10/100 speed: disabling TSO\n"); 5230 netdev->features &= ~NETIF_F_TSO; 5231 netdev->features &= ~NETIF_F_TSO6; 5232 break; 5233 case SPEED_1000: 5234 netdev->features |= NETIF_F_TSO; 5235 netdev->features |= NETIF_F_TSO6; 5236 break; 5237 default: 5238 /* oops */ 5239 break; 5240 } 5241 } 5242 5243 /* enable transmits in the hardware, need to do this 5244 * after setting TARC(0) 5245 */ 5246 tctl = er32(TCTL); 5247 tctl |= E1000_TCTL_EN; 5248 ew32(TCTL, tctl); 5249 5250 /* Perform any post-link-up configuration before 5251 * reporting link up. 5252 */ 5253 if (phy->ops.cfg_on_link_up) 5254 phy->ops.cfg_on_link_up(hw); 5255 5256 netif_carrier_on(netdev); 5257 5258 if (!test_bit(__E1000_DOWN, &adapter->state)) 5259 mod_timer(&adapter->phy_info_timer, 5260 round_jiffies(jiffies + 2 * HZ)); 5261 } 5262 } else { 5263 if (netif_carrier_ok(netdev)) { 5264 adapter->link_speed = 0; 5265 adapter->link_duplex = 0; 5266 /* Link status message must follow this format */ 5267 pr_info("%s NIC Link is Down\n", adapter->netdev->name); 5268 netif_carrier_off(netdev); 5269 if (!test_bit(__E1000_DOWN, &adapter->state)) 5270 mod_timer(&adapter->phy_info_timer, 5271 round_jiffies(jiffies + 2 * HZ)); 5272 5273 /* 8000ES2LAN requires a Rx packet buffer work-around 5274 * on link down event; reset the controller to flush 5275 * the Rx packet buffer. 5276 */ 5277 if (adapter->flags & FLAG_RX_NEEDS_RESTART) 5278 adapter->flags |= FLAG_RESTART_NOW; 5279 else 5280 pm_schedule_suspend(netdev->dev.parent, 5281 LINK_TIMEOUT); 5282 } 5283 } 5284 5285 link_up: 5286 spin_lock(&adapter->stats64_lock); 5287 e1000e_update_stats(adapter); 5288 5289 mac->tx_packet_delta = adapter->stats.tpt - adapter->tpt_old; 5290 adapter->tpt_old = adapter->stats.tpt; 5291 mac->collision_delta = adapter->stats.colc - adapter->colc_old; 5292 adapter->colc_old = adapter->stats.colc; 5293 5294 adapter->gorc = adapter->stats.gorc - adapter->gorc_old; 5295 adapter->gorc_old = adapter->stats.gorc; 5296 adapter->gotc = adapter->stats.gotc - adapter->gotc_old; 5297 adapter->gotc_old = adapter->stats.gotc; 5298 spin_unlock(&adapter->stats64_lock); 5299 5300 /* If the link is lost the controller stops DMA, but 5301 * if there is queued Tx work it cannot be done. So 5302 * reset the controller to flush the Tx packet buffers. 5303 */ 5304 if (!netif_carrier_ok(netdev) && 5305 (e1000_desc_unused(tx_ring) + 1 < tx_ring->count)) 5306 adapter->flags |= FLAG_RESTART_NOW; 5307 5308 /* If reset is necessary, do it outside of interrupt context. */ 5309 if (adapter->flags & FLAG_RESTART_NOW) { 5310 schedule_work(&adapter->reset_task); 5311 /* return immediately since reset is imminent */ 5312 return; 5313 } 5314 5315 e1000e_update_adaptive(&adapter->hw); 5316 5317 /* Simple mode for Interrupt Throttle Rate (ITR) */ 5318 if (adapter->itr_setting == 4) { 5319 /* Symmetric Tx/Rx gets a reduced ITR=2000; 5320 * Total asymmetrical Tx or Rx gets ITR=8000; 5321 * everyone else is between 2000-8000. 5322 */ 5323 u32 goc = (adapter->gotc + adapter->gorc) / 10000; 5324 u32 dif = (adapter->gotc > adapter->gorc ? 5325 adapter->gotc - adapter->gorc : 5326 adapter->gorc - adapter->gotc) / 10000; 5327 u32 itr = goc > 0 ? (dif * 6000 / goc + 2000) : 8000; 5328 5329 e1000e_write_itr(adapter, itr); 5330 } 5331 5332 /* Cause software interrupt to ensure Rx ring is cleaned */ 5333 if (adapter->msix_entries) 5334 ew32(ICS, adapter->rx_ring->ims_val); 5335 else 5336 ew32(ICS, E1000_ICS_RXDMT0); 5337 5338 /* flush pending descriptors to memory before detecting Tx hang */ 5339 e1000e_flush_descriptors(adapter); 5340 5341 /* Force detection of hung controller every watchdog period */ 5342 adapter->detect_tx_hung = true; 5343 5344 /* With 82571 controllers, LAA may be overwritten due to controller 5345 * reset from the other port. Set the appropriate LAA in RAR[0] 5346 */ 5347 if (e1000e_get_laa_state_82571(hw)) 5348 hw->mac.ops.rar_set(hw, adapter->hw.mac.addr, 0); 5349 5350 if (adapter->flags2 & FLAG2_CHECK_PHY_HANG) 5351 e1000e_check_82574_phy_workaround(adapter); 5352 5353 /* Clear valid timestamp stuck in RXSTMPL/H due to a Rx error */ 5354 if (adapter->hwtstamp_config.rx_filter != HWTSTAMP_FILTER_NONE) { 5355 if ((adapter->flags2 & FLAG2_CHECK_RX_HWTSTAMP) && 5356 (er32(TSYNCRXCTL) & E1000_TSYNCRXCTL_VALID)) { 5357 er32(RXSTMPH); 5358 adapter->rx_hwtstamp_cleared++; 5359 } else { 5360 adapter->flags2 |= FLAG2_CHECK_RX_HWTSTAMP; 5361 } 5362 } 5363 5364 /* Reset the timer */ 5365 if (!test_bit(__E1000_DOWN, &adapter->state)) 5366 mod_timer(&adapter->watchdog_timer, 5367 round_jiffies(jiffies + 2 * HZ)); 5368 } 5369 5370 #define E1000_TX_FLAGS_CSUM 0x00000001 5371 #define E1000_TX_FLAGS_VLAN 0x00000002 5372 #define E1000_TX_FLAGS_TSO 0x00000004 5373 #define E1000_TX_FLAGS_IPV4 0x00000008 5374 #define E1000_TX_FLAGS_NO_FCS 0x00000010 5375 #define E1000_TX_FLAGS_HWTSTAMP 0x00000020 5376 #define E1000_TX_FLAGS_VLAN_MASK 0xffff0000 5377 #define E1000_TX_FLAGS_VLAN_SHIFT 16 5378 5379 static int e1000_tso(struct e1000_ring *tx_ring, struct sk_buff *skb, 5380 __be16 protocol) 5381 { 5382 struct e1000_context_desc *context_desc; 5383 struct e1000_buffer *buffer_info; 5384 unsigned int i; 5385 u32 cmd_length = 0; 5386 u16 ipcse = 0, mss; 5387 u8 ipcss, ipcso, tucss, tucso, hdr_len; 5388 int err; 5389 5390 if (!skb_is_gso(skb)) 5391 return 0; 5392 5393 err = skb_cow_head(skb, 0); 5394 if (err < 0) 5395 return err; 5396 5397 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb); 5398 mss = skb_shinfo(skb)->gso_size; 5399 if (protocol == htons(ETH_P_IP)) { 5400 struct iphdr *iph = ip_hdr(skb); 5401 iph->tot_len = 0; 5402 iph->check = 0; 5403 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr, iph->daddr, 5404 0, IPPROTO_TCP, 0); 5405 cmd_length = E1000_TXD_CMD_IP; 5406 ipcse = skb_transport_offset(skb) - 1; 5407 } else if (skb_is_gso_v6(skb)) { 5408 ipv6_hdr(skb)->payload_len = 0; 5409 tcp_hdr(skb)->check = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr, 5410 &ipv6_hdr(skb)->daddr, 5411 0, IPPROTO_TCP, 0); 5412 ipcse = 0; 5413 } 5414 ipcss = skb_network_offset(skb); 5415 ipcso = (void *)&(ip_hdr(skb)->check) - (void *)skb->data; 5416 tucss = skb_transport_offset(skb); 5417 tucso = (void *)&(tcp_hdr(skb)->check) - (void *)skb->data; 5418 5419 cmd_length |= (E1000_TXD_CMD_DEXT | E1000_TXD_CMD_TSE | 5420 E1000_TXD_CMD_TCP | (skb->len - (hdr_len))); 5421 5422 i = tx_ring->next_to_use; 5423 context_desc = E1000_CONTEXT_DESC(*tx_ring, i); 5424 buffer_info = &tx_ring->buffer_info[i]; 5425 5426 context_desc->lower_setup.ip_fields.ipcss = ipcss; 5427 context_desc->lower_setup.ip_fields.ipcso = ipcso; 5428 context_desc->lower_setup.ip_fields.ipcse = cpu_to_le16(ipcse); 5429 context_desc->upper_setup.tcp_fields.tucss = tucss; 5430 context_desc->upper_setup.tcp_fields.tucso = tucso; 5431 context_desc->upper_setup.tcp_fields.tucse = 0; 5432 context_desc->tcp_seg_setup.fields.mss = cpu_to_le16(mss); 5433 context_desc->tcp_seg_setup.fields.hdr_len = hdr_len; 5434 context_desc->cmd_and_length = cpu_to_le32(cmd_length); 5435 5436 buffer_info->time_stamp = jiffies; 5437 buffer_info->next_to_watch = i; 5438 5439 i++; 5440 if (i == tx_ring->count) 5441 i = 0; 5442 tx_ring->next_to_use = i; 5443 5444 return 1; 5445 } 5446 5447 static bool e1000_tx_csum(struct e1000_ring *tx_ring, struct sk_buff *skb, 5448 __be16 protocol) 5449 { 5450 struct e1000_adapter *adapter = tx_ring->adapter; 5451 struct e1000_context_desc *context_desc; 5452 struct e1000_buffer *buffer_info; 5453 unsigned int i; 5454 u8 css; 5455 u32 cmd_len = E1000_TXD_CMD_DEXT; 5456 5457 if (skb->ip_summed != CHECKSUM_PARTIAL) 5458 return false; 5459 5460 switch (protocol) { 5461 case cpu_to_be16(ETH_P_IP): 5462 if (ip_hdr(skb)->protocol == IPPROTO_TCP) 5463 cmd_len |= E1000_TXD_CMD_TCP; 5464 break; 5465 case cpu_to_be16(ETH_P_IPV6): 5466 /* XXX not handling all IPV6 headers */ 5467 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP) 5468 cmd_len |= E1000_TXD_CMD_TCP; 5469 break; 5470 default: 5471 if (unlikely(net_ratelimit())) 5472 e_warn("checksum_partial proto=%x!\n", 5473 be16_to_cpu(protocol)); 5474 break; 5475 } 5476 5477 css = skb_checksum_start_offset(skb); 5478 5479 i = tx_ring->next_to_use; 5480 buffer_info = &tx_ring->buffer_info[i]; 5481 context_desc = E1000_CONTEXT_DESC(*tx_ring, i); 5482 5483 context_desc->lower_setup.ip_config = 0; 5484 context_desc->upper_setup.tcp_fields.tucss = css; 5485 context_desc->upper_setup.tcp_fields.tucso = css + skb->csum_offset; 5486 context_desc->upper_setup.tcp_fields.tucse = 0; 5487 context_desc->tcp_seg_setup.data = 0; 5488 context_desc->cmd_and_length = cpu_to_le32(cmd_len); 5489 5490 buffer_info->time_stamp = jiffies; 5491 buffer_info->next_to_watch = i; 5492 5493 i++; 5494 if (i == tx_ring->count) 5495 i = 0; 5496 tx_ring->next_to_use = i; 5497 5498 return true; 5499 } 5500 5501 static int e1000_tx_map(struct e1000_ring *tx_ring, struct sk_buff *skb, 5502 unsigned int first, unsigned int max_per_txd, 5503 unsigned int nr_frags) 5504 { 5505 struct e1000_adapter *adapter = tx_ring->adapter; 5506 struct pci_dev *pdev = adapter->pdev; 5507 struct e1000_buffer *buffer_info; 5508 unsigned int len = skb_headlen(skb); 5509 unsigned int offset = 0, size, count = 0, i; 5510 unsigned int f, bytecount, segs; 5511 5512 i = tx_ring->next_to_use; 5513 5514 while (len) { 5515 buffer_info = &tx_ring->buffer_info[i]; 5516 size = min(len, max_per_txd); 5517 5518 buffer_info->length = size; 5519 buffer_info->time_stamp = jiffies; 5520 buffer_info->next_to_watch = i; 5521 buffer_info->dma = dma_map_single(&pdev->dev, 5522 skb->data + offset, 5523 size, DMA_TO_DEVICE); 5524 buffer_info->mapped_as_page = false; 5525 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) 5526 goto dma_error; 5527 5528 len -= size; 5529 offset += size; 5530 count++; 5531 5532 if (len) { 5533 i++; 5534 if (i == tx_ring->count) 5535 i = 0; 5536 } 5537 } 5538 5539 for (f = 0; f < nr_frags; f++) { 5540 const struct skb_frag_struct *frag; 5541 5542 frag = &skb_shinfo(skb)->frags[f]; 5543 len = skb_frag_size(frag); 5544 offset = 0; 5545 5546 while (len) { 5547 i++; 5548 if (i == tx_ring->count) 5549 i = 0; 5550 5551 buffer_info = &tx_ring->buffer_info[i]; 5552 size = min(len, max_per_txd); 5553 5554 buffer_info->length = size; 5555 buffer_info->time_stamp = jiffies; 5556 buffer_info->next_to_watch = i; 5557 buffer_info->dma = skb_frag_dma_map(&pdev->dev, frag, 5558 offset, size, 5559 DMA_TO_DEVICE); 5560 buffer_info->mapped_as_page = true; 5561 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) 5562 goto dma_error; 5563 5564 len -= size; 5565 offset += size; 5566 count++; 5567 } 5568 } 5569 5570 segs = skb_shinfo(skb)->gso_segs ? : 1; 5571 /* multiply data chunks by size of headers */ 5572 bytecount = ((segs - 1) * skb_headlen(skb)) + skb->len; 5573 5574 tx_ring->buffer_info[i].skb = skb; 5575 tx_ring->buffer_info[i].segs = segs; 5576 tx_ring->buffer_info[i].bytecount = bytecount; 5577 tx_ring->buffer_info[first].next_to_watch = i; 5578 5579 return count; 5580 5581 dma_error: 5582 dev_err(&pdev->dev, "Tx DMA map failed\n"); 5583 buffer_info->dma = 0; 5584 if (count) 5585 count--; 5586 5587 while (count--) { 5588 if (i == 0) 5589 i += tx_ring->count; 5590 i--; 5591 buffer_info = &tx_ring->buffer_info[i]; 5592 e1000_put_txbuf(tx_ring, buffer_info); 5593 } 5594 5595 return 0; 5596 } 5597 5598 static void e1000_tx_queue(struct e1000_ring *tx_ring, int tx_flags, int count) 5599 { 5600 struct e1000_adapter *adapter = tx_ring->adapter; 5601 struct e1000_tx_desc *tx_desc = NULL; 5602 struct e1000_buffer *buffer_info; 5603 u32 txd_upper = 0, txd_lower = E1000_TXD_CMD_IFCS; 5604 unsigned int i; 5605 5606 if (tx_flags & E1000_TX_FLAGS_TSO) { 5607 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D | 5608 E1000_TXD_CMD_TSE; 5609 txd_upper |= E1000_TXD_POPTS_TXSM << 8; 5610 5611 if (tx_flags & E1000_TX_FLAGS_IPV4) 5612 txd_upper |= E1000_TXD_POPTS_IXSM << 8; 5613 } 5614 5615 if (tx_flags & E1000_TX_FLAGS_CSUM) { 5616 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D; 5617 txd_upper |= E1000_TXD_POPTS_TXSM << 8; 5618 } 5619 5620 if (tx_flags & E1000_TX_FLAGS_VLAN) { 5621 txd_lower |= E1000_TXD_CMD_VLE; 5622 txd_upper |= (tx_flags & E1000_TX_FLAGS_VLAN_MASK); 5623 } 5624 5625 if (unlikely(tx_flags & E1000_TX_FLAGS_NO_FCS)) 5626 txd_lower &= ~(E1000_TXD_CMD_IFCS); 5627 5628 if (unlikely(tx_flags & E1000_TX_FLAGS_HWTSTAMP)) { 5629 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D; 5630 txd_upper |= E1000_TXD_EXTCMD_TSTAMP; 5631 } 5632 5633 i = tx_ring->next_to_use; 5634 5635 do { 5636 buffer_info = &tx_ring->buffer_info[i]; 5637 tx_desc = E1000_TX_DESC(*tx_ring, i); 5638 tx_desc->buffer_addr = cpu_to_le64(buffer_info->dma); 5639 tx_desc->lower.data = cpu_to_le32(txd_lower | 5640 buffer_info->length); 5641 tx_desc->upper.data = cpu_to_le32(txd_upper); 5642 5643 i++; 5644 if (i == tx_ring->count) 5645 i = 0; 5646 } while (--count > 0); 5647 5648 tx_desc->lower.data |= cpu_to_le32(adapter->txd_cmd); 5649 5650 /* txd_cmd re-enables FCS, so we'll re-disable it here as desired. */ 5651 if (unlikely(tx_flags & E1000_TX_FLAGS_NO_FCS)) 5652 tx_desc->lower.data &= ~(cpu_to_le32(E1000_TXD_CMD_IFCS)); 5653 5654 /* Force memory writes to complete before letting h/w 5655 * know there are new descriptors to fetch. (Only 5656 * applicable for weak-ordered memory model archs, 5657 * such as IA-64). 5658 */ 5659 wmb(); 5660 5661 tx_ring->next_to_use = i; 5662 } 5663 5664 #define MINIMUM_DHCP_PACKET_SIZE 282 5665 static int e1000_transfer_dhcp_info(struct e1000_adapter *adapter, 5666 struct sk_buff *skb) 5667 { 5668 struct e1000_hw *hw = &adapter->hw; 5669 u16 length, offset; 5670 5671 if (skb_vlan_tag_present(skb) && 5672 !((skb_vlan_tag_get(skb) == adapter->hw.mng_cookie.vlan_id) && 5673 (adapter->hw.mng_cookie.status & 5674 E1000_MNG_DHCP_COOKIE_STATUS_VLAN))) 5675 return 0; 5676 5677 if (skb->len <= MINIMUM_DHCP_PACKET_SIZE) 5678 return 0; 5679 5680 if (((struct ethhdr *)skb->data)->h_proto != htons(ETH_P_IP)) 5681 return 0; 5682 5683 { 5684 const struct iphdr *ip = (struct iphdr *)((u8 *)skb->data + 14); 5685 struct udphdr *udp; 5686 5687 if (ip->protocol != IPPROTO_UDP) 5688 return 0; 5689 5690 udp = (struct udphdr *)((u8 *)ip + (ip->ihl << 2)); 5691 if (ntohs(udp->dest) != 67) 5692 return 0; 5693 5694 offset = (u8 *)udp + 8 - skb->data; 5695 length = skb->len - offset; 5696 return e1000e_mng_write_dhcp_info(hw, (u8 *)udp + 8, length); 5697 } 5698 5699 return 0; 5700 } 5701 5702 static int __e1000_maybe_stop_tx(struct e1000_ring *tx_ring, int size) 5703 { 5704 struct e1000_adapter *adapter = tx_ring->adapter; 5705 5706 netif_stop_queue(adapter->netdev); 5707 /* Herbert's original patch had: 5708 * smp_mb__after_netif_stop_queue(); 5709 * but since that doesn't exist yet, just open code it. 5710 */ 5711 smp_mb(); 5712 5713 /* We need to check again in a case another CPU has just 5714 * made room available. 5715 */ 5716 if (e1000_desc_unused(tx_ring) < size) 5717 return -EBUSY; 5718 5719 /* A reprieve! */ 5720 netif_start_queue(adapter->netdev); 5721 ++adapter->restart_queue; 5722 return 0; 5723 } 5724 5725 static int e1000_maybe_stop_tx(struct e1000_ring *tx_ring, int size) 5726 { 5727 BUG_ON(size > tx_ring->count); 5728 5729 if (e1000_desc_unused(tx_ring) >= size) 5730 return 0; 5731 return __e1000_maybe_stop_tx(tx_ring, size); 5732 } 5733 5734 static netdev_tx_t e1000_xmit_frame(struct sk_buff *skb, 5735 struct net_device *netdev) 5736 { 5737 struct e1000_adapter *adapter = netdev_priv(netdev); 5738 struct e1000_ring *tx_ring = adapter->tx_ring; 5739 unsigned int first; 5740 unsigned int tx_flags = 0; 5741 unsigned int len = skb_headlen(skb); 5742 unsigned int nr_frags; 5743 unsigned int mss; 5744 int count = 0; 5745 int tso; 5746 unsigned int f; 5747 __be16 protocol = vlan_get_protocol(skb); 5748 5749 if (test_bit(__E1000_DOWN, &adapter->state)) { 5750 dev_kfree_skb_any(skb); 5751 return NETDEV_TX_OK; 5752 } 5753 5754 if (skb->len <= 0) { 5755 dev_kfree_skb_any(skb); 5756 return NETDEV_TX_OK; 5757 } 5758 5759 /* The minimum packet size with TCTL.PSP set is 17 bytes so 5760 * pad skb in order to meet this minimum size requirement 5761 */ 5762 if (skb_put_padto(skb, 17)) 5763 return NETDEV_TX_OK; 5764 5765 mss = skb_shinfo(skb)->gso_size; 5766 if (mss) { 5767 u8 hdr_len; 5768 5769 /* TSO Workaround for 82571/2/3 Controllers -- if skb->data 5770 * points to just header, pull a few bytes of payload from 5771 * frags into skb->data 5772 */ 5773 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb); 5774 /* we do this workaround for ES2LAN, but it is un-necessary, 5775 * avoiding it could save a lot of cycles 5776 */ 5777 if (skb->data_len && (hdr_len == len)) { 5778 unsigned int pull_size; 5779 5780 pull_size = min_t(unsigned int, 4, skb->data_len); 5781 if (!__pskb_pull_tail(skb, pull_size)) { 5782 e_err("__pskb_pull_tail failed.\n"); 5783 dev_kfree_skb_any(skb); 5784 return NETDEV_TX_OK; 5785 } 5786 len = skb_headlen(skb); 5787 } 5788 } 5789 5790 /* reserve a descriptor for the offload context */ 5791 if ((mss) || (skb->ip_summed == CHECKSUM_PARTIAL)) 5792 count++; 5793 count++; 5794 5795 count += DIV_ROUND_UP(len, adapter->tx_fifo_limit); 5796 5797 nr_frags = skb_shinfo(skb)->nr_frags; 5798 for (f = 0; f < nr_frags; f++) 5799 count += DIV_ROUND_UP(skb_frag_size(&skb_shinfo(skb)->frags[f]), 5800 adapter->tx_fifo_limit); 5801 5802 if (adapter->hw.mac.tx_pkt_filtering) 5803 e1000_transfer_dhcp_info(adapter, skb); 5804 5805 /* need: count + 2 desc gap to keep tail from touching 5806 * head, otherwise try next time 5807 */ 5808 if (e1000_maybe_stop_tx(tx_ring, count + 2)) 5809 return NETDEV_TX_BUSY; 5810 5811 if (skb_vlan_tag_present(skb)) { 5812 tx_flags |= E1000_TX_FLAGS_VLAN; 5813 tx_flags |= (skb_vlan_tag_get(skb) << 5814 E1000_TX_FLAGS_VLAN_SHIFT); 5815 } 5816 5817 first = tx_ring->next_to_use; 5818 5819 tso = e1000_tso(tx_ring, skb, protocol); 5820 if (tso < 0) { 5821 dev_kfree_skb_any(skb); 5822 return NETDEV_TX_OK; 5823 } 5824 5825 if (tso) 5826 tx_flags |= E1000_TX_FLAGS_TSO; 5827 else if (e1000_tx_csum(tx_ring, skb, protocol)) 5828 tx_flags |= E1000_TX_FLAGS_CSUM; 5829 5830 /* Old method was to assume IPv4 packet by default if TSO was enabled. 5831 * 82571 hardware supports TSO capabilities for IPv6 as well... 5832 * no longer assume, we must. 5833 */ 5834 if (protocol == htons(ETH_P_IP)) 5835 tx_flags |= E1000_TX_FLAGS_IPV4; 5836 5837 if (unlikely(skb->no_fcs)) 5838 tx_flags |= E1000_TX_FLAGS_NO_FCS; 5839 5840 /* if count is 0 then mapping error has occurred */ 5841 count = e1000_tx_map(tx_ring, skb, first, adapter->tx_fifo_limit, 5842 nr_frags); 5843 if (count) { 5844 if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) && 5845 (adapter->flags & FLAG_HAS_HW_TIMESTAMP) && 5846 !adapter->tx_hwtstamp_skb) { 5847 skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS; 5848 tx_flags |= E1000_TX_FLAGS_HWTSTAMP; 5849 adapter->tx_hwtstamp_skb = skb_get(skb); 5850 adapter->tx_hwtstamp_start = jiffies; 5851 schedule_work(&adapter->tx_hwtstamp_work); 5852 } else { 5853 skb_tx_timestamp(skb); 5854 } 5855 5856 netdev_sent_queue(netdev, skb->len); 5857 e1000_tx_queue(tx_ring, tx_flags, count); 5858 /* Make sure there is space in the ring for the next send. */ 5859 e1000_maybe_stop_tx(tx_ring, 5860 (MAX_SKB_FRAGS * 5861 DIV_ROUND_UP(PAGE_SIZE, 5862 adapter->tx_fifo_limit) + 2)); 5863 5864 if (!skb->xmit_more || 5865 netif_xmit_stopped(netdev_get_tx_queue(netdev, 0))) { 5866 if (adapter->flags2 & FLAG2_PCIM2PCI_ARBITER_WA) 5867 e1000e_update_tdt_wa(tx_ring, 5868 tx_ring->next_to_use); 5869 else 5870 writel(tx_ring->next_to_use, tx_ring->tail); 5871 5872 /* we need this if more than one processor can write 5873 * to our tail at a time, it synchronizes IO on 5874 *IA64/Altix systems 5875 */ 5876 mmiowb(); 5877 } 5878 } else { 5879 dev_kfree_skb_any(skb); 5880 tx_ring->buffer_info[first].time_stamp = 0; 5881 tx_ring->next_to_use = first; 5882 } 5883 5884 return NETDEV_TX_OK; 5885 } 5886 5887 /** 5888 * e1000_tx_timeout - Respond to a Tx Hang 5889 * @netdev: network interface device structure 5890 **/ 5891 static void e1000_tx_timeout(struct net_device *netdev) 5892 { 5893 struct e1000_adapter *adapter = netdev_priv(netdev); 5894 5895 /* Do the reset outside of interrupt context */ 5896 adapter->tx_timeout_count++; 5897 schedule_work(&adapter->reset_task); 5898 } 5899 5900 static void e1000_reset_task(struct work_struct *work) 5901 { 5902 struct e1000_adapter *adapter; 5903 adapter = container_of(work, struct e1000_adapter, reset_task); 5904 5905 /* don't run the task if already down */ 5906 if (test_bit(__E1000_DOWN, &adapter->state)) 5907 return; 5908 5909 if (!(adapter->flags & FLAG_RESTART_NOW)) { 5910 e1000e_dump(adapter); 5911 e_err("Reset adapter unexpectedly\n"); 5912 } 5913 e1000e_reinit_locked(adapter); 5914 } 5915 5916 /** 5917 * e1000_get_stats64 - Get System Network Statistics 5918 * @netdev: network interface device structure 5919 * @stats: rtnl_link_stats64 pointer 5920 * 5921 * Returns the address of the device statistics structure. 5922 **/ 5923 void e1000e_get_stats64(struct net_device *netdev, 5924 struct rtnl_link_stats64 *stats) 5925 { 5926 struct e1000_adapter *adapter = netdev_priv(netdev); 5927 5928 spin_lock(&adapter->stats64_lock); 5929 e1000e_update_stats(adapter); 5930 /* Fill out the OS statistics structure */ 5931 stats->rx_bytes = adapter->stats.gorc; 5932 stats->rx_packets = adapter->stats.gprc; 5933 stats->tx_bytes = adapter->stats.gotc; 5934 stats->tx_packets = adapter->stats.gptc; 5935 stats->multicast = adapter->stats.mprc; 5936 stats->collisions = adapter->stats.colc; 5937 5938 /* Rx Errors */ 5939 5940 /* RLEC on some newer hardware can be incorrect so build 5941 * our own version based on RUC and ROC 5942 */ 5943 stats->rx_errors = adapter->stats.rxerrc + 5944 adapter->stats.crcerrs + adapter->stats.algnerrc + 5945 adapter->stats.ruc + adapter->stats.roc + adapter->stats.cexterr; 5946 stats->rx_length_errors = adapter->stats.ruc + adapter->stats.roc; 5947 stats->rx_crc_errors = adapter->stats.crcerrs; 5948 stats->rx_frame_errors = adapter->stats.algnerrc; 5949 stats->rx_missed_errors = adapter->stats.mpc; 5950 5951 /* Tx Errors */ 5952 stats->tx_errors = adapter->stats.ecol + adapter->stats.latecol; 5953 stats->tx_aborted_errors = adapter->stats.ecol; 5954 stats->tx_window_errors = adapter->stats.latecol; 5955 stats->tx_carrier_errors = adapter->stats.tncrs; 5956 5957 /* Tx Dropped needs to be maintained elsewhere */ 5958 5959 spin_unlock(&adapter->stats64_lock); 5960 } 5961 5962 /** 5963 * e1000_change_mtu - Change the Maximum Transfer Unit 5964 * @netdev: network interface device structure 5965 * @new_mtu: new value for maximum frame size 5966 * 5967 * Returns 0 on success, negative on failure 5968 **/ 5969 static int e1000_change_mtu(struct net_device *netdev, int new_mtu) 5970 { 5971 struct e1000_adapter *adapter = netdev_priv(netdev); 5972 int max_frame = new_mtu + VLAN_ETH_HLEN + ETH_FCS_LEN; 5973 5974 /* Jumbo frame support */ 5975 if ((new_mtu > ETH_DATA_LEN) && 5976 !(adapter->flags & FLAG_HAS_JUMBO_FRAMES)) { 5977 e_err("Jumbo Frames not supported.\n"); 5978 return -EINVAL; 5979 } 5980 5981 /* Jumbo frame workaround on 82579 and newer requires CRC be stripped */ 5982 if ((adapter->hw.mac.type >= e1000_pch2lan) && 5983 !(adapter->flags2 & FLAG2_CRC_STRIPPING) && 5984 (new_mtu > ETH_DATA_LEN)) { 5985 e_err("Jumbo Frames not supported on this device when CRC stripping is disabled.\n"); 5986 return -EINVAL; 5987 } 5988 5989 while (test_and_set_bit(__E1000_RESETTING, &adapter->state)) 5990 usleep_range(1000, 2000); 5991 /* e1000e_down -> e1000e_reset dependent on max_frame_size & mtu */ 5992 adapter->max_frame_size = max_frame; 5993 e_info("changing MTU from %d to %d\n", netdev->mtu, new_mtu); 5994 netdev->mtu = new_mtu; 5995 5996 pm_runtime_get_sync(netdev->dev.parent); 5997 5998 if (netif_running(netdev)) 5999 e1000e_down(adapter, true); 6000 6001 /* NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN 6002 * means we reserve 2 more, this pushes us to allocate from the next 6003 * larger slab size. 6004 * i.e. RXBUFFER_2048 --> size-4096 slab 6005 * However with the new *_jumbo_rx* routines, jumbo receives will use 6006 * fragmented skbs 6007 */ 6008 6009 if (max_frame <= 2048) 6010 adapter->rx_buffer_len = 2048; 6011 else 6012 adapter->rx_buffer_len = 4096; 6013 6014 /* adjust allocation if LPE protects us, and we aren't using SBP */ 6015 if (max_frame <= (VLAN_ETH_FRAME_LEN + ETH_FCS_LEN)) 6016 adapter->rx_buffer_len = VLAN_ETH_FRAME_LEN + ETH_FCS_LEN; 6017 6018 if (netif_running(netdev)) 6019 e1000e_up(adapter); 6020 else 6021 e1000e_reset(adapter); 6022 6023 pm_runtime_put_sync(netdev->dev.parent); 6024 6025 clear_bit(__E1000_RESETTING, &adapter->state); 6026 6027 return 0; 6028 } 6029 6030 static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr, 6031 int cmd) 6032 { 6033 struct e1000_adapter *adapter = netdev_priv(netdev); 6034 struct mii_ioctl_data *data = if_mii(ifr); 6035 6036 if (adapter->hw.phy.media_type != e1000_media_type_copper) 6037 return -EOPNOTSUPP; 6038 6039 switch (cmd) { 6040 case SIOCGMIIPHY: 6041 data->phy_id = adapter->hw.phy.addr; 6042 break; 6043 case SIOCGMIIREG: 6044 e1000_phy_read_status(adapter); 6045 6046 switch (data->reg_num & 0x1F) { 6047 case MII_BMCR: 6048 data->val_out = adapter->phy_regs.bmcr; 6049 break; 6050 case MII_BMSR: 6051 data->val_out = adapter->phy_regs.bmsr; 6052 break; 6053 case MII_PHYSID1: 6054 data->val_out = (adapter->hw.phy.id >> 16); 6055 break; 6056 case MII_PHYSID2: 6057 data->val_out = (adapter->hw.phy.id & 0xFFFF); 6058 break; 6059 case MII_ADVERTISE: 6060 data->val_out = adapter->phy_regs.advertise; 6061 break; 6062 case MII_LPA: 6063 data->val_out = adapter->phy_regs.lpa; 6064 break; 6065 case MII_EXPANSION: 6066 data->val_out = adapter->phy_regs.expansion; 6067 break; 6068 case MII_CTRL1000: 6069 data->val_out = adapter->phy_regs.ctrl1000; 6070 break; 6071 case MII_STAT1000: 6072 data->val_out = adapter->phy_regs.stat1000; 6073 break; 6074 case MII_ESTATUS: 6075 data->val_out = adapter->phy_regs.estatus; 6076 break; 6077 default: 6078 return -EIO; 6079 } 6080 break; 6081 case SIOCSMIIREG: 6082 default: 6083 return -EOPNOTSUPP; 6084 } 6085 return 0; 6086 } 6087 6088 /** 6089 * e1000e_hwtstamp_ioctl - control hardware time stamping 6090 * @netdev: network interface device structure 6091 * @ifreq: interface request 6092 * 6093 * Outgoing time stamping can be enabled and disabled. Play nice and 6094 * disable it when requested, although it shouldn't cause any overhead 6095 * when no packet needs it. At most one packet in the queue may be 6096 * marked for time stamping, otherwise it would be impossible to tell 6097 * for sure to which packet the hardware time stamp belongs. 6098 * 6099 * Incoming time stamping has to be configured via the hardware filters. 6100 * Not all combinations are supported, in particular event type has to be 6101 * specified. Matching the kind of event packet is not supported, with the 6102 * exception of "all V2 events regardless of level 2 or 4". 6103 **/ 6104 static int e1000e_hwtstamp_set(struct net_device *netdev, struct ifreq *ifr) 6105 { 6106 struct e1000_adapter *adapter = netdev_priv(netdev); 6107 struct hwtstamp_config config; 6108 int ret_val; 6109 6110 if (copy_from_user(&config, ifr->ifr_data, sizeof(config))) 6111 return -EFAULT; 6112 6113 ret_val = e1000e_config_hwtstamp(adapter, &config); 6114 if (ret_val) 6115 return ret_val; 6116 6117 switch (config.rx_filter) { 6118 case HWTSTAMP_FILTER_PTP_V2_L4_SYNC: 6119 case HWTSTAMP_FILTER_PTP_V2_L2_SYNC: 6120 case HWTSTAMP_FILTER_PTP_V2_SYNC: 6121 case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ: 6122 case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ: 6123 case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ: 6124 /* With V2 type filters which specify a Sync or Delay Request, 6125 * Path Delay Request/Response messages are also time stamped 6126 * by hardware so notify the caller the requested packets plus 6127 * some others are time stamped. 6128 */ 6129 config.rx_filter = HWTSTAMP_FILTER_SOME; 6130 break; 6131 default: 6132 break; 6133 } 6134 6135 return copy_to_user(ifr->ifr_data, &config, 6136 sizeof(config)) ? -EFAULT : 0; 6137 } 6138 6139 static int e1000e_hwtstamp_get(struct net_device *netdev, struct ifreq *ifr) 6140 { 6141 struct e1000_adapter *adapter = netdev_priv(netdev); 6142 6143 return copy_to_user(ifr->ifr_data, &adapter->hwtstamp_config, 6144 sizeof(adapter->hwtstamp_config)) ? -EFAULT : 0; 6145 } 6146 6147 static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd) 6148 { 6149 switch (cmd) { 6150 case SIOCGMIIPHY: 6151 case SIOCGMIIREG: 6152 case SIOCSMIIREG: 6153 return e1000_mii_ioctl(netdev, ifr, cmd); 6154 case SIOCSHWTSTAMP: 6155 return e1000e_hwtstamp_set(netdev, ifr); 6156 case SIOCGHWTSTAMP: 6157 return e1000e_hwtstamp_get(netdev, ifr); 6158 default: 6159 return -EOPNOTSUPP; 6160 } 6161 } 6162 6163 static int e1000_init_phy_wakeup(struct e1000_adapter *adapter, u32 wufc) 6164 { 6165 struct e1000_hw *hw = &adapter->hw; 6166 u32 i, mac_reg, wuc; 6167 u16 phy_reg, wuc_enable; 6168 int retval; 6169 6170 /* copy MAC RARs to PHY RARs */ 6171 e1000_copy_rx_addrs_to_phy_ich8lan(hw); 6172 6173 retval = hw->phy.ops.acquire(hw); 6174 if (retval) { 6175 e_err("Could not acquire PHY\n"); 6176 return retval; 6177 } 6178 6179 /* Enable access to wakeup registers on and set page to BM_WUC_PAGE */ 6180 retval = e1000_enable_phy_wakeup_reg_access_bm(hw, &wuc_enable); 6181 if (retval) 6182 goto release; 6183 6184 /* copy MAC MTA to PHY MTA - only needed for pchlan */ 6185 for (i = 0; i < adapter->hw.mac.mta_reg_count; i++) { 6186 mac_reg = E1000_READ_REG_ARRAY(hw, E1000_MTA, i); 6187 hw->phy.ops.write_reg_page(hw, BM_MTA(i), 6188 (u16)(mac_reg & 0xFFFF)); 6189 hw->phy.ops.write_reg_page(hw, BM_MTA(i) + 1, 6190 (u16)((mac_reg >> 16) & 0xFFFF)); 6191 } 6192 6193 /* configure PHY Rx Control register */ 6194 hw->phy.ops.read_reg_page(&adapter->hw, BM_RCTL, &phy_reg); 6195 mac_reg = er32(RCTL); 6196 if (mac_reg & E1000_RCTL_UPE) 6197 phy_reg |= BM_RCTL_UPE; 6198 if (mac_reg & E1000_RCTL_MPE) 6199 phy_reg |= BM_RCTL_MPE; 6200 phy_reg &= ~(BM_RCTL_MO_MASK); 6201 if (mac_reg & E1000_RCTL_MO_3) 6202 phy_reg |= (((mac_reg & E1000_RCTL_MO_3) >> E1000_RCTL_MO_SHIFT) 6203 << BM_RCTL_MO_SHIFT); 6204 if (mac_reg & E1000_RCTL_BAM) 6205 phy_reg |= BM_RCTL_BAM; 6206 if (mac_reg & E1000_RCTL_PMCF) 6207 phy_reg |= BM_RCTL_PMCF; 6208 mac_reg = er32(CTRL); 6209 if (mac_reg & E1000_CTRL_RFCE) 6210 phy_reg |= BM_RCTL_RFCE; 6211 hw->phy.ops.write_reg_page(&adapter->hw, BM_RCTL, phy_reg); 6212 6213 wuc = E1000_WUC_PME_EN; 6214 if (wufc & (E1000_WUFC_MAG | E1000_WUFC_LNKC)) 6215 wuc |= E1000_WUC_APME; 6216 6217 /* enable PHY wakeup in MAC register */ 6218 ew32(WUFC, wufc); 6219 ew32(WUC, (E1000_WUC_PHY_WAKE | E1000_WUC_APMPME | 6220 E1000_WUC_PME_STATUS | wuc)); 6221 6222 /* configure and enable PHY wakeup in PHY registers */ 6223 hw->phy.ops.write_reg_page(&adapter->hw, BM_WUFC, wufc); 6224 hw->phy.ops.write_reg_page(&adapter->hw, BM_WUC, wuc); 6225 6226 /* activate PHY wakeup */ 6227 wuc_enable |= BM_WUC_ENABLE_BIT | BM_WUC_HOST_WU_BIT; 6228 retval = e1000_disable_phy_wakeup_reg_access_bm(hw, &wuc_enable); 6229 if (retval) 6230 e_err("Could not set PHY Host Wakeup bit\n"); 6231 release: 6232 hw->phy.ops.release(hw); 6233 6234 return retval; 6235 } 6236 6237 static void e1000e_flush_lpic(struct pci_dev *pdev) 6238 { 6239 struct net_device *netdev = pci_get_drvdata(pdev); 6240 struct e1000_adapter *adapter = netdev_priv(netdev); 6241 struct e1000_hw *hw = &adapter->hw; 6242 u32 ret_val; 6243 6244 pm_runtime_get_sync(netdev->dev.parent); 6245 6246 ret_val = hw->phy.ops.acquire(hw); 6247 if (ret_val) 6248 goto fl_out; 6249 6250 pr_info("EEE TX LPI TIMER: %08X\n", 6251 er32(LPIC) >> E1000_LPIC_LPIET_SHIFT); 6252 6253 hw->phy.ops.release(hw); 6254 6255 fl_out: 6256 pm_runtime_put_sync(netdev->dev.parent); 6257 } 6258 6259 static int e1000e_pm_freeze(struct device *dev) 6260 { 6261 struct net_device *netdev = pci_get_drvdata(to_pci_dev(dev)); 6262 struct e1000_adapter *adapter = netdev_priv(netdev); 6263 6264 netif_device_detach(netdev); 6265 6266 if (netif_running(netdev)) { 6267 int count = E1000_CHECK_RESET_COUNT; 6268 6269 while (test_bit(__E1000_RESETTING, &adapter->state) && count--) 6270 usleep_range(10000, 20000); 6271 6272 WARN_ON(test_bit(__E1000_RESETTING, &adapter->state)); 6273 6274 /* Quiesce the device without resetting the hardware */ 6275 e1000e_down(adapter, false); 6276 e1000_free_irq(adapter); 6277 e1000e_reset_interrupt_capability(adapter); 6278 } 6279 6280 /* Allow time for pending master requests to run */ 6281 e1000e_disable_pcie_master(&adapter->hw); 6282 6283 return 0; 6284 } 6285 6286 static int __e1000_shutdown(struct pci_dev *pdev, bool runtime) 6287 { 6288 struct net_device *netdev = pci_get_drvdata(pdev); 6289 struct e1000_adapter *adapter = netdev_priv(netdev); 6290 struct e1000_hw *hw = &adapter->hw; 6291 u32 ctrl, ctrl_ext, rctl, status; 6292 /* Runtime suspend should only enable wakeup for link changes */ 6293 u32 wufc = runtime ? E1000_WUFC_LNKC : adapter->wol; 6294 int retval = 0; 6295 6296 status = er32(STATUS); 6297 if (status & E1000_STATUS_LU) 6298 wufc &= ~E1000_WUFC_LNKC; 6299 6300 if (wufc) { 6301 e1000_setup_rctl(adapter); 6302 e1000e_set_rx_mode(netdev); 6303 6304 /* turn on all-multi mode if wake on multicast is enabled */ 6305 if (wufc & E1000_WUFC_MC) { 6306 rctl = er32(RCTL); 6307 rctl |= E1000_RCTL_MPE; 6308 ew32(RCTL, rctl); 6309 } 6310 6311 ctrl = er32(CTRL); 6312 ctrl |= E1000_CTRL_ADVD3WUC; 6313 if (!(adapter->flags2 & FLAG2_HAS_PHY_WAKEUP)) 6314 ctrl |= E1000_CTRL_EN_PHY_PWR_MGMT; 6315 ew32(CTRL, ctrl); 6316 6317 if (adapter->hw.phy.media_type == e1000_media_type_fiber || 6318 adapter->hw.phy.media_type == 6319 e1000_media_type_internal_serdes) { 6320 /* keep the laser running in D3 */ 6321 ctrl_ext = er32(CTRL_EXT); 6322 ctrl_ext |= E1000_CTRL_EXT_SDP3_DATA; 6323 ew32(CTRL_EXT, ctrl_ext); 6324 } 6325 6326 if (!runtime) 6327 e1000e_power_up_phy(adapter); 6328 6329 if (adapter->flags & FLAG_IS_ICH) 6330 e1000_suspend_workarounds_ich8lan(&adapter->hw); 6331 6332 if (adapter->flags2 & FLAG2_HAS_PHY_WAKEUP) { 6333 /* enable wakeup by the PHY */ 6334 retval = e1000_init_phy_wakeup(adapter, wufc); 6335 if (retval) 6336 return retval; 6337 } else { 6338 /* enable wakeup by the MAC */ 6339 ew32(WUFC, wufc); 6340 ew32(WUC, E1000_WUC_PME_EN); 6341 } 6342 } else { 6343 ew32(WUC, 0); 6344 ew32(WUFC, 0); 6345 6346 e1000_power_down_phy(adapter); 6347 } 6348 6349 if (adapter->hw.phy.type == e1000_phy_igp_3) { 6350 e1000e_igp3_phy_powerdown_workaround_ich8lan(&adapter->hw); 6351 } else if ((hw->mac.type == e1000_pch_lpt) || 6352 (hw->mac.type == e1000_pch_spt)) { 6353 if (!(wufc & (E1000_WUFC_EX | E1000_WUFC_MC | E1000_WUFC_BC))) 6354 /* ULP does not support wake from unicast, multicast 6355 * or broadcast. 6356 */ 6357 retval = e1000_enable_ulp_lpt_lp(hw, !runtime); 6358 6359 if (retval) 6360 return retval; 6361 } 6362 6363 /* Ensure that the appropriate bits are set in LPI_CTRL 6364 * for EEE in Sx 6365 */ 6366 if ((hw->phy.type >= e1000_phy_i217) && 6367 adapter->eee_advert && hw->dev_spec.ich8lan.eee_lp_ability) { 6368 u16 lpi_ctrl = 0; 6369 6370 retval = hw->phy.ops.acquire(hw); 6371 if (!retval) { 6372 retval = e1e_rphy_locked(hw, I82579_LPI_CTRL, 6373 &lpi_ctrl); 6374 if (!retval) { 6375 if (adapter->eee_advert & 6376 hw->dev_spec.ich8lan.eee_lp_ability & 6377 I82579_EEE_100_SUPPORTED) 6378 lpi_ctrl |= I82579_LPI_CTRL_100_ENABLE; 6379 if (adapter->eee_advert & 6380 hw->dev_spec.ich8lan.eee_lp_ability & 6381 I82579_EEE_1000_SUPPORTED) 6382 lpi_ctrl |= I82579_LPI_CTRL_1000_ENABLE; 6383 6384 retval = e1e_wphy_locked(hw, I82579_LPI_CTRL, 6385 lpi_ctrl); 6386 } 6387 } 6388 hw->phy.ops.release(hw); 6389 } 6390 6391 /* Release control of h/w to f/w. If f/w is AMT enabled, this 6392 * would have already happened in close and is redundant. 6393 */ 6394 e1000e_release_hw_control(adapter); 6395 6396 pci_clear_master(pdev); 6397 6398 /* The pci-e switch on some quad port adapters will report a 6399 * correctable error when the MAC transitions from D0 to D3. To 6400 * prevent this we need to mask off the correctable errors on the 6401 * downstream port of the pci-e switch. 6402 * 6403 * We don't have the associated upstream bridge while assigning 6404 * the PCI device into guest. For example, the KVM on power is 6405 * one of the cases. 6406 */ 6407 if (adapter->flags & FLAG_IS_QUAD_PORT) { 6408 struct pci_dev *us_dev = pdev->bus->self; 6409 u16 devctl; 6410 6411 if (!us_dev) 6412 return 0; 6413 6414 pcie_capability_read_word(us_dev, PCI_EXP_DEVCTL, &devctl); 6415 pcie_capability_write_word(us_dev, PCI_EXP_DEVCTL, 6416 (devctl & ~PCI_EXP_DEVCTL_CERE)); 6417 6418 pci_save_state(pdev); 6419 pci_prepare_to_sleep(pdev); 6420 6421 pcie_capability_write_word(us_dev, PCI_EXP_DEVCTL, devctl); 6422 } 6423 6424 return 0; 6425 } 6426 6427 /** 6428 * __e1000e_disable_aspm - Disable ASPM states 6429 * @pdev: pointer to PCI device struct 6430 * @state: bit-mask of ASPM states to disable 6431 * @locked: indication if this context holds pci_bus_sem locked. 6432 * 6433 * Some devices *must* have certain ASPM states disabled per hardware errata. 6434 **/ 6435 static void __e1000e_disable_aspm(struct pci_dev *pdev, u16 state, int locked) 6436 { 6437 struct pci_dev *parent = pdev->bus->self; 6438 u16 aspm_dis_mask = 0; 6439 u16 pdev_aspmc, parent_aspmc; 6440 6441 switch (state) { 6442 case PCIE_LINK_STATE_L0S: 6443 case PCIE_LINK_STATE_L0S | PCIE_LINK_STATE_L1: 6444 aspm_dis_mask |= PCI_EXP_LNKCTL_ASPM_L0S; 6445 /* fall-through - can't have L1 without L0s */ 6446 case PCIE_LINK_STATE_L1: 6447 aspm_dis_mask |= PCI_EXP_LNKCTL_ASPM_L1; 6448 break; 6449 default: 6450 return; 6451 } 6452 6453 pcie_capability_read_word(pdev, PCI_EXP_LNKCTL, &pdev_aspmc); 6454 pdev_aspmc &= PCI_EXP_LNKCTL_ASPMC; 6455 6456 if (parent) { 6457 pcie_capability_read_word(parent, PCI_EXP_LNKCTL, 6458 &parent_aspmc); 6459 parent_aspmc &= PCI_EXP_LNKCTL_ASPMC; 6460 } 6461 6462 /* Nothing to do if the ASPM states to be disabled already are */ 6463 if (!(pdev_aspmc & aspm_dis_mask) && 6464 (!parent || !(parent_aspmc & aspm_dis_mask))) 6465 return; 6466 6467 dev_info(&pdev->dev, "Disabling ASPM %s %s\n", 6468 (aspm_dis_mask & pdev_aspmc & PCI_EXP_LNKCTL_ASPM_L0S) ? 6469 "L0s" : "", 6470 (aspm_dis_mask & pdev_aspmc & PCI_EXP_LNKCTL_ASPM_L1) ? 6471 "L1" : ""); 6472 6473 #ifdef CONFIG_PCIEASPM 6474 if (locked) 6475 pci_disable_link_state_locked(pdev, state); 6476 else 6477 pci_disable_link_state(pdev, state); 6478 6479 /* Double-check ASPM control. If not disabled by the above, the 6480 * BIOS is preventing that from happening (or CONFIG_PCIEASPM is 6481 * not enabled); override by writing PCI config space directly. 6482 */ 6483 pcie_capability_read_word(pdev, PCI_EXP_LNKCTL, &pdev_aspmc); 6484 pdev_aspmc &= PCI_EXP_LNKCTL_ASPMC; 6485 6486 if (!(aspm_dis_mask & pdev_aspmc)) 6487 return; 6488 #endif 6489 6490 /* Both device and parent should have the same ASPM setting. 6491 * Disable ASPM in downstream component first and then upstream. 6492 */ 6493 pcie_capability_clear_word(pdev, PCI_EXP_LNKCTL, aspm_dis_mask); 6494 6495 if (parent) 6496 pcie_capability_clear_word(parent, PCI_EXP_LNKCTL, 6497 aspm_dis_mask); 6498 } 6499 6500 /** 6501 * e1000e_disable_aspm - Disable ASPM states. 6502 * @pdev: pointer to PCI device struct 6503 * @state: bit-mask of ASPM states to disable 6504 * 6505 * This function acquires the pci_bus_sem! 6506 * Some devices *must* have certain ASPM states disabled per hardware errata. 6507 **/ 6508 static void e1000e_disable_aspm(struct pci_dev *pdev, u16 state) 6509 { 6510 __e1000e_disable_aspm(pdev, state, 0); 6511 } 6512 6513 /** 6514 * e1000e_disable_aspm_locked Disable ASPM states. 6515 * @pdev: pointer to PCI device struct 6516 * @state: bit-mask of ASPM states to disable 6517 * 6518 * This function must be called with pci_bus_sem acquired! 6519 * Some devices *must* have certain ASPM states disabled per hardware errata. 6520 **/ 6521 static void e1000e_disable_aspm_locked(struct pci_dev *pdev, u16 state) 6522 { 6523 __e1000e_disable_aspm(pdev, state, 1); 6524 } 6525 6526 #ifdef CONFIG_PM 6527 static int __e1000_resume(struct pci_dev *pdev) 6528 { 6529 struct net_device *netdev = pci_get_drvdata(pdev); 6530 struct e1000_adapter *adapter = netdev_priv(netdev); 6531 struct e1000_hw *hw = &adapter->hw; 6532 u16 aspm_disable_flag = 0; 6533 6534 if (adapter->flags2 & FLAG2_DISABLE_ASPM_L0S) 6535 aspm_disable_flag = PCIE_LINK_STATE_L0S; 6536 if (adapter->flags2 & FLAG2_DISABLE_ASPM_L1) 6537 aspm_disable_flag |= PCIE_LINK_STATE_L1; 6538 if (aspm_disable_flag) 6539 e1000e_disable_aspm(pdev, aspm_disable_flag); 6540 6541 pci_set_master(pdev); 6542 6543 if (hw->mac.type >= e1000_pch2lan) 6544 e1000_resume_workarounds_pchlan(&adapter->hw); 6545 6546 e1000e_power_up_phy(adapter); 6547 6548 /* report the system wakeup cause from S3/S4 */ 6549 if (adapter->flags2 & FLAG2_HAS_PHY_WAKEUP) { 6550 u16 phy_data; 6551 6552 e1e_rphy(&adapter->hw, BM_WUS, &phy_data); 6553 if (phy_data) { 6554 e_info("PHY Wakeup cause - %s\n", 6555 phy_data & E1000_WUS_EX ? "Unicast Packet" : 6556 phy_data & E1000_WUS_MC ? "Multicast Packet" : 6557 phy_data & E1000_WUS_BC ? "Broadcast Packet" : 6558 phy_data & E1000_WUS_MAG ? "Magic Packet" : 6559 phy_data & E1000_WUS_LNKC ? 6560 "Link Status Change" : "other"); 6561 } 6562 e1e_wphy(&adapter->hw, BM_WUS, ~0); 6563 } else { 6564 u32 wus = er32(WUS); 6565 6566 if (wus) { 6567 e_info("MAC Wakeup cause - %s\n", 6568 wus & E1000_WUS_EX ? "Unicast Packet" : 6569 wus & E1000_WUS_MC ? "Multicast Packet" : 6570 wus & E1000_WUS_BC ? "Broadcast Packet" : 6571 wus & E1000_WUS_MAG ? "Magic Packet" : 6572 wus & E1000_WUS_LNKC ? "Link Status Change" : 6573 "other"); 6574 } 6575 ew32(WUS, ~0); 6576 } 6577 6578 e1000e_reset(adapter); 6579 6580 e1000_init_manageability_pt(adapter); 6581 6582 /* If the controller has AMT, do not set DRV_LOAD until the interface 6583 * is up. For all other cases, let the f/w know that the h/w is now 6584 * under the control of the driver. 6585 */ 6586 if (!(adapter->flags & FLAG_HAS_AMT)) 6587 e1000e_get_hw_control(adapter); 6588 6589 return 0; 6590 } 6591 6592 #ifdef CONFIG_PM_SLEEP 6593 static int e1000e_pm_thaw(struct device *dev) 6594 { 6595 struct net_device *netdev = pci_get_drvdata(to_pci_dev(dev)); 6596 struct e1000_adapter *adapter = netdev_priv(netdev); 6597 6598 e1000e_set_interrupt_capability(adapter); 6599 if (netif_running(netdev)) { 6600 u32 err = e1000_request_irq(adapter); 6601 6602 if (err) 6603 return err; 6604 6605 e1000e_up(adapter); 6606 } 6607 6608 netif_device_attach(netdev); 6609 6610 return 0; 6611 } 6612 6613 static int e1000e_pm_suspend(struct device *dev) 6614 { 6615 struct pci_dev *pdev = to_pci_dev(dev); 6616 6617 e1000e_flush_lpic(pdev); 6618 6619 e1000e_pm_freeze(dev); 6620 6621 return __e1000_shutdown(pdev, false); 6622 } 6623 6624 static int e1000e_pm_resume(struct device *dev) 6625 { 6626 struct pci_dev *pdev = to_pci_dev(dev); 6627 int rc; 6628 6629 rc = __e1000_resume(pdev); 6630 if (rc) 6631 return rc; 6632 6633 return e1000e_pm_thaw(dev); 6634 } 6635 #endif /* CONFIG_PM_SLEEP */ 6636 6637 static int e1000e_pm_runtime_idle(struct device *dev) 6638 { 6639 struct pci_dev *pdev = to_pci_dev(dev); 6640 struct net_device *netdev = pci_get_drvdata(pdev); 6641 struct e1000_adapter *adapter = netdev_priv(netdev); 6642 u16 eee_lp; 6643 6644 eee_lp = adapter->hw.dev_spec.ich8lan.eee_lp_ability; 6645 6646 if (!e1000e_has_link(adapter)) { 6647 adapter->hw.dev_spec.ich8lan.eee_lp_ability = eee_lp; 6648 pm_schedule_suspend(dev, 5 * MSEC_PER_SEC); 6649 } 6650 6651 return -EBUSY; 6652 } 6653 6654 static int e1000e_pm_runtime_resume(struct device *dev) 6655 { 6656 struct pci_dev *pdev = to_pci_dev(dev); 6657 struct net_device *netdev = pci_get_drvdata(pdev); 6658 struct e1000_adapter *adapter = netdev_priv(netdev); 6659 int rc; 6660 6661 rc = __e1000_resume(pdev); 6662 if (rc) 6663 return rc; 6664 6665 if (netdev->flags & IFF_UP) 6666 e1000e_up(adapter); 6667 6668 return rc; 6669 } 6670 6671 static int e1000e_pm_runtime_suspend(struct device *dev) 6672 { 6673 struct pci_dev *pdev = to_pci_dev(dev); 6674 struct net_device *netdev = pci_get_drvdata(pdev); 6675 struct e1000_adapter *adapter = netdev_priv(netdev); 6676 6677 if (netdev->flags & IFF_UP) { 6678 int count = E1000_CHECK_RESET_COUNT; 6679 6680 while (test_bit(__E1000_RESETTING, &adapter->state) && count--) 6681 usleep_range(10000, 20000); 6682 6683 WARN_ON(test_bit(__E1000_RESETTING, &adapter->state)); 6684 6685 /* Down the device without resetting the hardware */ 6686 e1000e_down(adapter, false); 6687 } 6688 6689 if (__e1000_shutdown(pdev, true)) { 6690 e1000e_pm_runtime_resume(dev); 6691 return -EBUSY; 6692 } 6693 6694 return 0; 6695 } 6696 #endif /* CONFIG_PM */ 6697 6698 static void e1000_shutdown(struct pci_dev *pdev) 6699 { 6700 e1000e_flush_lpic(pdev); 6701 6702 e1000e_pm_freeze(&pdev->dev); 6703 6704 __e1000_shutdown(pdev, false); 6705 } 6706 6707 #ifdef CONFIG_NET_POLL_CONTROLLER 6708 6709 static irqreturn_t e1000_intr_msix(int __always_unused irq, void *data) 6710 { 6711 struct net_device *netdev = data; 6712 struct e1000_adapter *adapter = netdev_priv(netdev); 6713 6714 if (adapter->msix_entries) { 6715 int vector, msix_irq; 6716 6717 vector = 0; 6718 msix_irq = adapter->msix_entries[vector].vector; 6719 disable_irq(msix_irq); 6720 e1000_intr_msix_rx(msix_irq, netdev); 6721 enable_irq(msix_irq); 6722 6723 vector++; 6724 msix_irq = adapter->msix_entries[vector].vector; 6725 disable_irq(msix_irq); 6726 e1000_intr_msix_tx(msix_irq, netdev); 6727 enable_irq(msix_irq); 6728 6729 vector++; 6730 msix_irq = adapter->msix_entries[vector].vector; 6731 disable_irq(msix_irq); 6732 e1000_msix_other(msix_irq, netdev); 6733 enable_irq(msix_irq); 6734 } 6735 6736 return IRQ_HANDLED; 6737 } 6738 6739 /** 6740 * e1000_netpoll 6741 * @netdev: network interface device structure 6742 * 6743 * Polling 'interrupt' - used by things like netconsole to send skbs 6744 * without having to re-enable interrupts. It's not called while 6745 * the interrupt routine is executing. 6746 */ 6747 static void e1000_netpoll(struct net_device *netdev) 6748 { 6749 struct e1000_adapter *adapter = netdev_priv(netdev); 6750 6751 switch (adapter->int_mode) { 6752 case E1000E_INT_MODE_MSIX: 6753 e1000_intr_msix(adapter->pdev->irq, netdev); 6754 break; 6755 case E1000E_INT_MODE_MSI: 6756 if (disable_hardirq(adapter->pdev->irq)) 6757 e1000_intr_msi(adapter->pdev->irq, netdev); 6758 enable_irq(adapter->pdev->irq); 6759 break; 6760 default: /* E1000E_INT_MODE_LEGACY */ 6761 if (disable_hardirq(adapter->pdev->irq)) 6762 e1000_intr(adapter->pdev->irq, netdev); 6763 enable_irq(adapter->pdev->irq); 6764 break; 6765 } 6766 } 6767 #endif 6768 6769 /** 6770 * e1000_io_error_detected - called when PCI error is detected 6771 * @pdev: Pointer to PCI device 6772 * @state: The current pci connection state 6773 * 6774 * This function is called after a PCI bus error affecting 6775 * this device has been detected. 6776 */ 6777 static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev, 6778 pci_channel_state_t state) 6779 { 6780 struct net_device *netdev = pci_get_drvdata(pdev); 6781 struct e1000_adapter *adapter = netdev_priv(netdev); 6782 6783 netif_device_detach(netdev); 6784 6785 if (state == pci_channel_io_perm_failure) 6786 return PCI_ERS_RESULT_DISCONNECT; 6787 6788 if (netif_running(netdev)) 6789 e1000e_down(adapter, true); 6790 pci_disable_device(pdev); 6791 6792 /* Request a slot slot reset. */ 6793 return PCI_ERS_RESULT_NEED_RESET; 6794 } 6795 6796 /** 6797 * e1000_io_slot_reset - called after the pci bus has been reset. 6798 * @pdev: Pointer to PCI device 6799 * 6800 * Restart the card from scratch, as if from a cold-boot. Implementation 6801 * resembles the first-half of the e1000e_pm_resume routine. 6802 */ 6803 static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev) 6804 { 6805 struct net_device *netdev = pci_get_drvdata(pdev); 6806 struct e1000_adapter *adapter = netdev_priv(netdev); 6807 struct e1000_hw *hw = &adapter->hw; 6808 u16 aspm_disable_flag = 0; 6809 int err; 6810 pci_ers_result_t result; 6811 6812 if (adapter->flags2 & FLAG2_DISABLE_ASPM_L0S) 6813 aspm_disable_flag = PCIE_LINK_STATE_L0S; 6814 if (adapter->flags2 & FLAG2_DISABLE_ASPM_L1) 6815 aspm_disable_flag |= PCIE_LINK_STATE_L1; 6816 if (aspm_disable_flag) 6817 e1000e_disable_aspm_locked(pdev, aspm_disable_flag); 6818 6819 err = pci_enable_device_mem(pdev); 6820 if (err) { 6821 dev_err(&pdev->dev, 6822 "Cannot re-enable PCI device after reset.\n"); 6823 result = PCI_ERS_RESULT_DISCONNECT; 6824 } else { 6825 pdev->state_saved = true; 6826 pci_restore_state(pdev); 6827 pci_set_master(pdev); 6828 6829 pci_enable_wake(pdev, PCI_D3hot, 0); 6830 pci_enable_wake(pdev, PCI_D3cold, 0); 6831 6832 e1000e_reset(adapter); 6833 ew32(WUS, ~0); 6834 result = PCI_ERS_RESULT_RECOVERED; 6835 } 6836 6837 pci_cleanup_aer_uncorrect_error_status(pdev); 6838 6839 return result; 6840 } 6841 6842 /** 6843 * e1000_io_resume - called when traffic can start flowing again. 6844 * @pdev: Pointer to PCI device 6845 * 6846 * This callback is called when the error recovery driver tells us that 6847 * its OK to resume normal operation. Implementation resembles the 6848 * second-half of the e1000e_pm_resume routine. 6849 */ 6850 static void e1000_io_resume(struct pci_dev *pdev) 6851 { 6852 struct net_device *netdev = pci_get_drvdata(pdev); 6853 struct e1000_adapter *adapter = netdev_priv(netdev); 6854 6855 e1000_init_manageability_pt(adapter); 6856 6857 if (netif_running(netdev)) 6858 e1000e_up(adapter); 6859 6860 netif_device_attach(netdev); 6861 6862 /* If the controller has AMT, do not set DRV_LOAD until the interface 6863 * is up. For all other cases, let the f/w know that the h/w is now 6864 * under the control of the driver. 6865 */ 6866 if (!(adapter->flags & FLAG_HAS_AMT)) 6867 e1000e_get_hw_control(adapter); 6868 } 6869 6870 static void e1000_print_device_info(struct e1000_adapter *adapter) 6871 { 6872 struct e1000_hw *hw = &adapter->hw; 6873 struct net_device *netdev = adapter->netdev; 6874 u32 ret_val; 6875 u8 pba_str[E1000_PBANUM_LENGTH]; 6876 6877 /* print bus type/speed/width info */ 6878 e_info("(PCI Express:2.5GT/s:%s) %pM\n", 6879 /* bus width */ 6880 ((hw->bus.width == e1000_bus_width_pcie_x4) ? "Width x4" : 6881 "Width x1"), 6882 /* MAC address */ 6883 netdev->dev_addr); 6884 e_info("Intel(R) PRO/%s Network Connection\n", 6885 (hw->phy.type == e1000_phy_ife) ? "10/100" : "1000"); 6886 ret_val = e1000_read_pba_string_generic(hw, pba_str, 6887 E1000_PBANUM_LENGTH); 6888 if (ret_val) 6889 strlcpy((char *)pba_str, "Unknown", sizeof(pba_str)); 6890 e_info("MAC: %d, PHY: %d, PBA No: %s\n", 6891 hw->mac.type, hw->phy.type, pba_str); 6892 } 6893 6894 static void e1000_eeprom_checks(struct e1000_adapter *adapter) 6895 { 6896 struct e1000_hw *hw = &adapter->hw; 6897 int ret_val; 6898 u16 buf = 0; 6899 6900 if (hw->mac.type != e1000_82573) 6901 return; 6902 6903 ret_val = e1000_read_nvm(hw, NVM_INIT_CONTROL2_REG, 1, &buf); 6904 le16_to_cpus(&buf); 6905 if (!ret_val && (!(buf & BIT(0)))) { 6906 /* Deep Smart Power Down (DSPD) */ 6907 dev_warn(&adapter->pdev->dev, 6908 "Warning: detected DSPD enabled in EEPROM\n"); 6909 } 6910 } 6911 6912 static netdev_features_t e1000_fix_features(struct net_device *netdev, 6913 netdev_features_t features) 6914 { 6915 struct e1000_adapter *adapter = netdev_priv(netdev); 6916 struct e1000_hw *hw = &adapter->hw; 6917 6918 /* Jumbo frame workaround on 82579 and newer requires CRC be stripped */ 6919 if ((hw->mac.type >= e1000_pch2lan) && (netdev->mtu > ETH_DATA_LEN)) 6920 features &= ~NETIF_F_RXFCS; 6921 6922 /* Since there is no support for separate Rx/Tx vlan accel 6923 * enable/disable make sure Tx flag is always in same state as Rx. 6924 */ 6925 if (features & NETIF_F_HW_VLAN_CTAG_RX) 6926 features |= NETIF_F_HW_VLAN_CTAG_TX; 6927 else 6928 features &= ~NETIF_F_HW_VLAN_CTAG_TX; 6929 6930 return features; 6931 } 6932 6933 static int e1000_set_features(struct net_device *netdev, 6934 netdev_features_t features) 6935 { 6936 struct e1000_adapter *adapter = netdev_priv(netdev); 6937 netdev_features_t changed = features ^ netdev->features; 6938 6939 if (changed & (NETIF_F_TSO | NETIF_F_TSO6)) 6940 adapter->flags |= FLAG_TSO_FORCE; 6941 6942 if (!(changed & (NETIF_F_HW_VLAN_CTAG_RX | NETIF_F_HW_VLAN_CTAG_TX | 6943 NETIF_F_RXCSUM | NETIF_F_RXHASH | NETIF_F_RXFCS | 6944 NETIF_F_RXALL))) 6945 return 0; 6946 6947 if (changed & NETIF_F_RXFCS) { 6948 if (features & NETIF_F_RXFCS) { 6949 adapter->flags2 &= ~FLAG2_CRC_STRIPPING; 6950 } else { 6951 /* We need to take it back to defaults, which might mean 6952 * stripping is still disabled at the adapter level. 6953 */ 6954 if (adapter->flags2 & FLAG2_DFLT_CRC_STRIPPING) 6955 adapter->flags2 |= FLAG2_CRC_STRIPPING; 6956 else 6957 adapter->flags2 &= ~FLAG2_CRC_STRIPPING; 6958 } 6959 } 6960 6961 netdev->features = features; 6962 6963 if (netif_running(netdev)) 6964 e1000e_reinit_locked(adapter); 6965 else 6966 e1000e_reset(adapter); 6967 6968 return 0; 6969 } 6970 6971 static const struct net_device_ops e1000e_netdev_ops = { 6972 .ndo_open = e1000e_open, 6973 .ndo_stop = e1000e_close, 6974 .ndo_start_xmit = e1000_xmit_frame, 6975 .ndo_get_stats64 = e1000e_get_stats64, 6976 .ndo_set_rx_mode = e1000e_set_rx_mode, 6977 .ndo_set_mac_address = e1000_set_mac, 6978 .ndo_change_mtu = e1000_change_mtu, 6979 .ndo_do_ioctl = e1000_ioctl, 6980 .ndo_tx_timeout = e1000_tx_timeout, 6981 .ndo_validate_addr = eth_validate_addr, 6982 6983 .ndo_vlan_rx_add_vid = e1000_vlan_rx_add_vid, 6984 .ndo_vlan_rx_kill_vid = e1000_vlan_rx_kill_vid, 6985 #ifdef CONFIG_NET_POLL_CONTROLLER 6986 .ndo_poll_controller = e1000_netpoll, 6987 #endif 6988 .ndo_set_features = e1000_set_features, 6989 .ndo_fix_features = e1000_fix_features, 6990 .ndo_features_check = passthru_features_check, 6991 }; 6992 6993 /** 6994 * e1000_probe - Device Initialization Routine 6995 * @pdev: PCI device information struct 6996 * @ent: entry in e1000_pci_tbl 6997 * 6998 * Returns 0 on success, negative on failure 6999 * 7000 * e1000_probe initializes an adapter identified by a pci_dev structure. 7001 * The OS initialization, configuring of the adapter private structure, 7002 * and a hardware reset occur. 7003 **/ 7004 static int e1000_probe(struct pci_dev *pdev, const struct pci_device_id *ent) 7005 { 7006 struct net_device *netdev; 7007 struct e1000_adapter *adapter; 7008 struct e1000_hw *hw; 7009 const struct e1000_info *ei = e1000_info_tbl[ent->driver_data]; 7010 resource_size_t mmio_start, mmio_len; 7011 resource_size_t flash_start, flash_len; 7012 static int cards_found; 7013 u16 aspm_disable_flag = 0; 7014 int bars, i, err, pci_using_dac; 7015 u16 eeprom_data = 0; 7016 u16 eeprom_apme_mask = E1000_EEPROM_APME; 7017 s32 ret_val = 0; 7018 7019 if (ei->flags2 & FLAG2_DISABLE_ASPM_L0S) 7020 aspm_disable_flag = PCIE_LINK_STATE_L0S; 7021 if (ei->flags2 & FLAG2_DISABLE_ASPM_L1) 7022 aspm_disable_flag |= PCIE_LINK_STATE_L1; 7023 if (aspm_disable_flag) 7024 e1000e_disable_aspm(pdev, aspm_disable_flag); 7025 7026 err = pci_enable_device_mem(pdev); 7027 if (err) 7028 return err; 7029 7030 pci_using_dac = 0; 7031 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64)); 7032 if (!err) { 7033 pci_using_dac = 1; 7034 } else { 7035 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)); 7036 if (err) { 7037 dev_err(&pdev->dev, 7038 "No usable DMA configuration, aborting\n"); 7039 goto err_dma; 7040 } 7041 } 7042 7043 bars = pci_select_bars(pdev, IORESOURCE_MEM); 7044 err = pci_request_selected_regions_exclusive(pdev, bars, 7045 e1000e_driver_name); 7046 if (err) 7047 goto err_pci_reg; 7048 7049 /* AER (Advanced Error Reporting) hooks */ 7050 pci_enable_pcie_error_reporting(pdev); 7051 7052 pci_set_master(pdev); 7053 /* PCI config space info */ 7054 err = pci_save_state(pdev); 7055 if (err) 7056 goto err_alloc_etherdev; 7057 7058 err = -ENOMEM; 7059 netdev = alloc_etherdev(sizeof(struct e1000_adapter)); 7060 if (!netdev) 7061 goto err_alloc_etherdev; 7062 7063 SET_NETDEV_DEV(netdev, &pdev->dev); 7064 7065 netdev->irq = pdev->irq; 7066 7067 pci_set_drvdata(pdev, netdev); 7068 adapter = netdev_priv(netdev); 7069 hw = &adapter->hw; 7070 adapter->netdev = netdev; 7071 adapter->pdev = pdev; 7072 adapter->ei = ei; 7073 adapter->pba = ei->pba; 7074 adapter->flags = ei->flags; 7075 adapter->flags2 = ei->flags2; 7076 adapter->hw.adapter = adapter; 7077 adapter->hw.mac.type = ei->mac; 7078 adapter->max_hw_frame_size = ei->max_hw_frame_size; 7079 adapter->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE); 7080 7081 mmio_start = pci_resource_start(pdev, 0); 7082 mmio_len = pci_resource_len(pdev, 0); 7083 7084 err = -EIO; 7085 adapter->hw.hw_addr = ioremap(mmio_start, mmio_len); 7086 if (!adapter->hw.hw_addr) 7087 goto err_ioremap; 7088 7089 if ((adapter->flags & FLAG_HAS_FLASH) && 7090 (pci_resource_flags(pdev, 1) & IORESOURCE_MEM) && 7091 (hw->mac.type < e1000_pch_spt)) { 7092 flash_start = pci_resource_start(pdev, 1); 7093 flash_len = pci_resource_len(pdev, 1); 7094 adapter->hw.flash_address = ioremap(flash_start, flash_len); 7095 if (!adapter->hw.flash_address) 7096 goto err_flashmap; 7097 } 7098 7099 /* Set default EEE advertisement */ 7100 if (adapter->flags2 & FLAG2_HAS_EEE) 7101 adapter->eee_advert = MDIO_EEE_100TX | MDIO_EEE_1000T; 7102 7103 /* construct the net_device struct */ 7104 netdev->netdev_ops = &e1000e_netdev_ops; 7105 e1000e_set_ethtool_ops(netdev); 7106 netdev->watchdog_timeo = 5 * HZ; 7107 netif_napi_add(netdev, &adapter->napi, e1000e_poll, 64); 7108 strlcpy(netdev->name, pci_name(pdev), sizeof(netdev->name)); 7109 7110 netdev->mem_start = mmio_start; 7111 netdev->mem_end = mmio_start + mmio_len; 7112 7113 adapter->bd_number = cards_found++; 7114 7115 e1000e_check_options(adapter); 7116 7117 /* setup adapter struct */ 7118 err = e1000_sw_init(adapter); 7119 if (err) 7120 goto err_sw_init; 7121 7122 memcpy(&hw->mac.ops, ei->mac_ops, sizeof(hw->mac.ops)); 7123 memcpy(&hw->nvm.ops, ei->nvm_ops, sizeof(hw->nvm.ops)); 7124 memcpy(&hw->phy.ops, ei->phy_ops, sizeof(hw->phy.ops)); 7125 7126 err = ei->get_variants(adapter); 7127 if (err) 7128 goto err_hw_init; 7129 7130 if ((adapter->flags & FLAG_IS_ICH) && 7131 (adapter->flags & FLAG_READ_ONLY_NVM) && 7132 (hw->mac.type < e1000_pch_spt)) 7133 e1000e_write_protect_nvm_ich8lan(&adapter->hw); 7134 7135 hw->mac.ops.get_bus_info(&adapter->hw); 7136 7137 adapter->hw.phy.autoneg_wait_to_complete = 0; 7138 7139 /* Copper options */ 7140 if (adapter->hw.phy.media_type == e1000_media_type_copper) { 7141 adapter->hw.phy.mdix = AUTO_ALL_MODES; 7142 adapter->hw.phy.disable_polarity_correction = 0; 7143 adapter->hw.phy.ms_type = e1000_ms_hw_default; 7144 } 7145 7146 if (hw->phy.ops.check_reset_block && hw->phy.ops.check_reset_block(hw)) 7147 dev_info(&pdev->dev, 7148 "PHY reset is blocked due to SOL/IDER session.\n"); 7149 7150 /* Set initial default active device features */ 7151 netdev->features = (NETIF_F_SG | 7152 NETIF_F_HW_VLAN_CTAG_RX | 7153 NETIF_F_HW_VLAN_CTAG_TX | 7154 NETIF_F_TSO | 7155 NETIF_F_TSO6 | 7156 NETIF_F_RXHASH | 7157 NETIF_F_RXCSUM | 7158 NETIF_F_HW_CSUM); 7159 7160 /* Set user-changeable features (subset of all device features) */ 7161 netdev->hw_features = netdev->features; 7162 netdev->hw_features |= NETIF_F_RXFCS; 7163 netdev->priv_flags |= IFF_SUPP_NOFCS; 7164 netdev->hw_features |= NETIF_F_RXALL; 7165 7166 if (adapter->flags & FLAG_HAS_HW_VLAN_FILTER) 7167 netdev->features |= NETIF_F_HW_VLAN_CTAG_FILTER; 7168 7169 netdev->vlan_features |= (NETIF_F_SG | 7170 NETIF_F_TSO | 7171 NETIF_F_TSO6 | 7172 NETIF_F_HW_CSUM); 7173 7174 netdev->priv_flags |= IFF_UNICAST_FLT; 7175 7176 if (pci_using_dac) { 7177 netdev->features |= NETIF_F_HIGHDMA; 7178 netdev->vlan_features |= NETIF_F_HIGHDMA; 7179 } 7180 7181 /* MTU range: 68 - max_hw_frame_size */ 7182 netdev->min_mtu = ETH_MIN_MTU; 7183 netdev->max_mtu = adapter->max_hw_frame_size - 7184 (VLAN_ETH_HLEN + ETH_FCS_LEN); 7185 7186 if (e1000e_enable_mng_pass_thru(&adapter->hw)) 7187 adapter->flags |= FLAG_MNG_PT_ENABLED; 7188 7189 /* before reading the NVM, reset the controller to 7190 * put the device in a known good starting state 7191 */ 7192 adapter->hw.mac.ops.reset_hw(&adapter->hw); 7193 7194 /* systems with ASPM and others may see the checksum fail on the first 7195 * attempt. Let's give it a few tries 7196 */ 7197 for (i = 0;; i++) { 7198 if (e1000_validate_nvm_checksum(&adapter->hw) >= 0) 7199 break; 7200 if (i == 2) { 7201 dev_err(&pdev->dev, "The NVM Checksum Is Not Valid\n"); 7202 err = -EIO; 7203 goto err_eeprom; 7204 } 7205 } 7206 7207 e1000_eeprom_checks(adapter); 7208 7209 /* copy the MAC address */ 7210 if (e1000e_read_mac_addr(&adapter->hw)) 7211 dev_err(&pdev->dev, 7212 "NVM Read Error while reading MAC address\n"); 7213 7214 memcpy(netdev->dev_addr, adapter->hw.mac.addr, netdev->addr_len); 7215 7216 if (!is_valid_ether_addr(netdev->dev_addr)) { 7217 dev_err(&pdev->dev, "Invalid MAC Address: %pM\n", 7218 netdev->dev_addr); 7219 err = -EIO; 7220 goto err_eeprom; 7221 } 7222 7223 init_timer(&adapter->watchdog_timer); 7224 adapter->watchdog_timer.function = e1000_watchdog; 7225 adapter->watchdog_timer.data = (unsigned long)adapter; 7226 7227 init_timer(&adapter->phy_info_timer); 7228 adapter->phy_info_timer.function = e1000_update_phy_info; 7229 adapter->phy_info_timer.data = (unsigned long)adapter; 7230 7231 INIT_WORK(&adapter->reset_task, e1000_reset_task); 7232 INIT_WORK(&adapter->watchdog_task, e1000_watchdog_task); 7233 INIT_WORK(&adapter->downshift_task, e1000e_downshift_workaround); 7234 INIT_WORK(&adapter->update_phy_task, e1000e_update_phy_task); 7235 INIT_WORK(&adapter->print_hang_task, e1000_print_hw_hang); 7236 7237 /* Initialize link parameters. User can change them with ethtool */ 7238 adapter->hw.mac.autoneg = 1; 7239 adapter->fc_autoneg = true; 7240 adapter->hw.fc.requested_mode = e1000_fc_default; 7241 adapter->hw.fc.current_mode = e1000_fc_default; 7242 adapter->hw.phy.autoneg_advertised = 0x2f; 7243 7244 /* Initial Wake on LAN setting - If APM wake is enabled in 7245 * the EEPROM, enable the ACPI Magic Packet filter 7246 */ 7247 if (adapter->flags & FLAG_APME_IN_WUC) { 7248 /* APME bit in EEPROM is mapped to WUC.APME */ 7249 eeprom_data = er32(WUC); 7250 eeprom_apme_mask = E1000_WUC_APME; 7251 if ((hw->mac.type > e1000_ich10lan) && 7252 (eeprom_data & E1000_WUC_PHY_WAKE)) 7253 adapter->flags2 |= FLAG2_HAS_PHY_WAKEUP; 7254 } else if (adapter->flags & FLAG_APME_IN_CTRL3) { 7255 if (adapter->flags & FLAG_APME_CHECK_PORT_B && 7256 (adapter->hw.bus.func == 1)) 7257 ret_val = e1000_read_nvm(&adapter->hw, 7258 NVM_INIT_CONTROL3_PORT_B, 7259 1, &eeprom_data); 7260 else 7261 ret_val = e1000_read_nvm(&adapter->hw, 7262 NVM_INIT_CONTROL3_PORT_A, 7263 1, &eeprom_data); 7264 } 7265 7266 /* fetch WoL from EEPROM */ 7267 if (ret_val) 7268 e_dbg("NVM read error getting WoL initial values: %d\n", ret_val); 7269 else if (eeprom_data & eeprom_apme_mask) 7270 adapter->eeprom_wol |= E1000_WUFC_MAG; 7271 7272 /* now that we have the eeprom settings, apply the special cases 7273 * where the eeprom may be wrong or the board simply won't support 7274 * wake on lan on a particular port 7275 */ 7276 if (!(adapter->flags & FLAG_HAS_WOL)) 7277 adapter->eeprom_wol = 0; 7278 7279 /* initialize the wol settings based on the eeprom settings */ 7280 adapter->wol = adapter->eeprom_wol; 7281 7282 /* make sure adapter isn't asleep if manageability is enabled */ 7283 if (adapter->wol || (adapter->flags & FLAG_MNG_PT_ENABLED) || 7284 (hw->mac.ops.check_mng_mode(hw))) 7285 device_wakeup_enable(&pdev->dev); 7286 7287 /* save off EEPROM version number */ 7288 ret_val = e1000_read_nvm(&adapter->hw, 5, 1, &adapter->eeprom_vers); 7289 7290 if (ret_val) { 7291 e_dbg("NVM read error getting EEPROM version: %d\n", ret_val); 7292 adapter->eeprom_vers = 0; 7293 } 7294 7295 /* init PTP hardware clock */ 7296 e1000e_ptp_init(adapter); 7297 7298 /* reset the hardware with the new settings */ 7299 e1000e_reset(adapter); 7300 7301 /* If the controller has AMT, do not set DRV_LOAD until the interface 7302 * is up. For all other cases, let the f/w know that the h/w is now 7303 * under the control of the driver. 7304 */ 7305 if (!(adapter->flags & FLAG_HAS_AMT)) 7306 e1000e_get_hw_control(adapter); 7307 7308 strlcpy(netdev->name, "eth%d", sizeof(netdev->name)); 7309 err = register_netdev(netdev); 7310 if (err) 7311 goto err_register; 7312 7313 /* carrier off reporting is important to ethtool even BEFORE open */ 7314 netif_carrier_off(netdev); 7315 7316 e1000_print_device_info(adapter); 7317 7318 if (pci_dev_run_wake(pdev)) 7319 pm_runtime_put_noidle(&pdev->dev); 7320 7321 return 0; 7322 7323 err_register: 7324 if (!(adapter->flags & FLAG_HAS_AMT)) 7325 e1000e_release_hw_control(adapter); 7326 err_eeprom: 7327 if (hw->phy.ops.check_reset_block && !hw->phy.ops.check_reset_block(hw)) 7328 e1000_phy_hw_reset(&adapter->hw); 7329 err_hw_init: 7330 kfree(adapter->tx_ring); 7331 kfree(adapter->rx_ring); 7332 err_sw_init: 7333 if ((adapter->hw.flash_address) && (hw->mac.type < e1000_pch_spt)) 7334 iounmap(adapter->hw.flash_address); 7335 e1000e_reset_interrupt_capability(adapter); 7336 err_flashmap: 7337 iounmap(adapter->hw.hw_addr); 7338 err_ioremap: 7339 free_netdev(netdev); 7340 err_alloc_etherdev: 7341 pci_release_mem_regions(pdev); 7342 err_pci_reg: 7343 err_dma: 7344 pci_disable_device(pdev); 7345 return err; 7346 } 7347 7348 /** 7349 * e1000_remove - Device Removal Routine 7350 * @pdev: PCI device information struct 7351 * 7352 * e1000_remove is called by the PCI subsystem to alert the driver 7353 * that it should release a PCI device. The could be caused by a 7354 * Hot-Plug event, or because the driver is going to be removed from 7355 * memory. 7356 **/ 7357 static void e1000_remove(struct pci_dev *pdev) 7358 { 7359 struct net_device *netdev = pci_get_drvdata(pdev); 7360 struct e1000_adapter *adapter = netdev_priv(netdev); 7361 bool down = test_bit(__E1000_DOWN, &adapter->state); 7362 7363 e1000e_ptp_remove(adapter); 7364 7365 /* The timers may be rescheduled, so explicitly disable them 7366 * from being rescheduled. 7367 */ 7368 if (!down) 7369 set_bit(__E1000_DOWN, &adapter->state); 7370 del_timer_sync(&adapter->watchdog_timer); 7371 del_timer_sync(&adapter->phy_info_timer); 7372 7373 cancel_work_sync(&adapter->reset_task); 7374 cancel_work_sync(&adapter->watchdog_task); 7375 cancel_work_sync(&adapter->downshift_task); 7376 cancel_work_sync(&adapter->update_phy_task); 7377 cancel_work_sync(&adapter->print_hang_task); 7378 7379 if (adapter->flags & FLAG_HAS_HW_TIMESTAMP) { 7380 cancel_work_sync(&adapter->tx_hwtstamp_work); 7381 if (adapter->tx_hwtstamp_skb) { 7382 dev_kfree_skb_any(adapter->tx_hwtstamp_skb); 7383 adapter->tx_hwtstamp_skb = NULL; 7384 } 7385 } 7386 7387 /* Don't lie to e1000_close() down the road. */ 7388 if (!down) 7389 clear_bit(__E1000_DOWN, &adapter->state); 7390 unregister_netdev(netdev); 7391 7392 if (pci_dev_run_wake(pdev)) 7393 pm_runtime_get_noresume(&pdev->dev); 7394 7395 /* Release control of h/w to f/w. If f/w is AMT enabled, this 7396 * would have already happened in close and is redundant. 7397 */ 7398 e1000e_release_hw_control(adapter); 7399 7400 e1000e_reset_interrupt_capability(adapter); 7401 kfree(adapter->tx_ring); 7402 kfree(adapter->rx_ring); 7403 7404 iounmap(adapter->hw.hw_addr); 7405 if ((adapter->hw.flash_address) && 7406 (adapter->hw.mac.type < e1000_pch_spt)) 7407 iounmap(adapter->hw.flash_address); 7408 pci_release_mem_regions(pdev); 7409 7410 free_netdev(netdev); 7411 7412 /* AER disable */ 7413 pci_disable_pcie_error_reporting(pdev); 7414 7415 pci_disable_device(pdev); 7416 } 7417 7418 /* PCI Error Recovery (ERS) */ 7419 static const struct pci_error_handlers e1000_err_handler = { 7420 .error_detected = e1000_io_error_detected, 7421 .slot_reset = e1000_io_slot_reset, 7422 .resume = e1000_io_resume, 7423 }; 7424 7425 static const struct pci_device_id e1000_pci_tbl[] = { 7426 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_COPPER), board_82571 }, 7427 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_FIBER), board_82571 }, 7428 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_QUAD_COPPER), board_82571 }, 7429 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_QUAD_COPPER_LP), 7430 board_82571 }, 7431 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_QUAD_FIBER), board_82571 }, 7432 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_SERDES), board_82571 }, 7433 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_SERDES_DUAL), board_82571 }, 7434 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_SERDES_QUAD), board_82571 }, 7435 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571PT_QUAD_COPPER), board_82571 }, 7436 7437 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82572EI), board_82572 }, 7438 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82572EI_COPPER), board_82572 }, 7439 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82572EI_FIBER), board_82572 }, 7440 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82572EI_SERDES), board_82572 }, 7441 7442 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82573E), board_82573 }, 7443 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82573E_IAMT), board_82573 }, 7444 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82573L), board_82573 }, 7445 7446 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82574L), board_82574 }, 7447 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82574LA), board_82574 }, 7448 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82583V), board_82583 }, 7449 7450 { PCI_VDEVICE(INTEL, E1000_DEV_ID_80003ES2LAN_COPPER_DPT), 7451 board_80003es2lan }, 7452 { PCI_VDEVICE(INTEL, E1000_DEV_ID_80003ES2LAN_COPPER_SPT), 7453 board_80003es2lan }, 7454 { PCI_VDEVICE(INTEL, E1000_DEV_ID_80003ES2LAN_SERDES_DPT), 7455 board_80003es2lan }, 7456 { PCI_VDEVICE(INTEL, E1000_DEV_ID_80003ES2LAN_SERDES_SPT), 7457 board_80003es2lan }, 7458 7459 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IFE), board_ich8lan }, 7460 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IFE_G), board_ich8lan }, 7461 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IFE_GT), board_ich8lan }, 7462 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IGP_AMT), board_ich8lan }, 7463 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IGP_C), board_ich8lan }, 7464 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IGP_M), board_ich8lan }, 7465 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IGP_M_AMT), board_ich8lan }, 7466 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_82567V_3), board_ich8lan }, 7467 7468 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IFE), board_ich9lan }, 7469 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IFE_G), board_ich9lan }, 7470 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IFE_GT), board_ich9lan }, 7471 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IGP_AMT), board_ich9lan }, 7472 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IGP_C), board_ich9lan }, 7473 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_BM), board_ich9lan }, 7474 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IGP_M), board_ich9lan }, 7475 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IGP_M_AMT), board_ich9lan }, 7476 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IGP_M_V), board_ich9lan }, 7477 7478 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_R_BM_LM), board_ich9lan }, 7479 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_R_BM_LF), board_ich9lan }, 7480 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_R_BM_V), board_ich9lan }, 7481 7482 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_D_BM_LM), board_ich10lan }, 7483 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_D_BM_LF), board_ich10lan }, 7484 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_D_BM_V), board_ich10lan }, 7485 7486 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_M_HV_LM), board_pchlan }, 7487 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_M_HV_LC), board_pchlan }, 7488 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_D_HV_DM), board_pchlan }, 7489 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_D_HV_DC), board_pchlan }, 7490 7491 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH2_LV_LM), board_pch2lan }, 7492 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH2_LV_V), board_pch2lan }, 7493 7494 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_LPT_I217_LM), board_pch_lpt }, 7495 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_LPT_I217_V), board_pch_lpt }, 7496 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_LPTLP_I218_LM), board_pch_lpt }, 7497 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_LPTLP_I218_V), board_pch_lpt }, 7498 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_I218_LM2), board_pch_lpt }, 7499 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_I218_V2), board_pch_lpt }, 7500 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_I218_LM3), board_pch_lpt }, 7501 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_I218_V3), board_pch_lpt }, 7502 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_SPT_I219_LM), board_pch_spt }, 7503 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_SPT_I219_V), board_pch_spt }, 7504 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_SPT_I219_LM2), board_pch_spt }, 7505 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_SPT_I219_V2), board_pch_spt }, 7506 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_LBG_I219_LM3), board_pch_spt }, 7507 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_SPT_I219_LM4), board_pch_spt }, 7508 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_SPT_I219_V4), board_pch_spt }, 7509 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_SPT_I219_LM5), board_pch_spt }, 7510 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_SPT_I219_V5), board_pch_spt }, 7511 7512 { 0, 0, 0, 0, 0, 0, 0 } /* terminate list */ 7513 }; 7514 MODULE_DEVICE_TABLE(pci, e1000_pci_tbl); 7515 7516 static const struct dev_pm_ops e1000_pm_ops = { 7517 #ifdef CONFIG_PM_SLEEP 7518 .suspend = e1000e_pm_suspend, 7519 .resume = e1000e_pm_resume, 7520 .freeze = e1000e_pm_freeze, 7521 .thaw = e1000e_pm_thaw, 7522 .poweroff = e1000e_pm_suspend, 7523 .restore = e1000e_pm_resume, 7524 #endif 7525 SET_RUNTIME_PM_OPS(e1000e_pm_runtime_suspend, e1000e_pm_runtime_resume, 7526 e1000e_pm_runtime_idle) 7527 }; 7528 7529 /* PCI Device API Driver */ 7530 static struct pci_driver e1000_driver = { 7531 .name = e1000e_driver_name, 7532 .id_table = e1000_pci_tbl, 7533 .probe = e1000_probe, 7534 .remove = e1000_remove, 7535 .driver = { 7536 .pm = &e1000_pm_ops, 7537 }, 7538 .shutdown = e1000_shutdown, 7539 .err_handler = &e1000_err_handler 7540 }; 7541 7542 /** 7543 * e1000_init_module - Driver Registration Routine 7544 * 7545 * e1000_init_module is the first routine called when the driver is 7546 * loaded. All it does is register with the PCI subsystem. 7547 **/ 7548 static int __init e1000_init_module(void) 7549 { 7550 pr_info("Intel(R) PRO/1000 Network Driver - %s\n", 7551 e1000e_driver_version); 7552 pr_info("Copyright(c) 1999 - 2015 Intel Corporation.\n"); 7553 7554 return pci_register_driver(&e1000_driver); 7555 } 7556 module_init(e1000_init_module); 7557 7558 /** 7559 * e1000_exit_module - Driver Exit Cleanup Routine 7560 * 7561 * e1000_exit_module is called just before the driver is removed 7562 * from memory. 7563 **/ 7564 static void __exit e1000_exit_module(void) 7565 { 7566 pci_unregister_driver(&e1000_driver); 7567 } 7568 module_exit(e1000_exit_module); 7569 7570 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>"); 7571 MODULE_DESCRIPTION("Intel(R) PRO/1000 Network Driver"); 7572 MODULE_LICENSE("GPL"); 7573 MODULE_VERSION(DRV_VERSION); 7574 7575 /* netdev.c */ 7576